TUN-8456: Update quic-go to 0.45 and collect mtu and congestion control metrics

component-tests/test_tail.py

@@ -47,7 +47,12 @@ class TestTail:
             url = cfd_cli.get_management_wsurl("logs", config, config_path)
             async with connect(url, open_timeout=5, close_timeout=5) as websocket:
                 # send start_streaming
-                await websocket.send('{"type": "start_streaming"}')
+                await websocket.send(json.dumps({
+                    "type": "start_streaming",
+                    "filters": {
+                        "events": ["http"]
+                    }
+                }))
                 # send some http requests to the tunnel to trigger some logs
                 await generate_and_validate_http_events(websocket, config.get_url(), 10)
                 # send stop_streaming
@@ -99,7 +104,8 @@ class TestTail:
                 await websocket.send(json.dumps({
                     "type": "start_streaming",
                     "filters": {
-                        "sampling": 0.5
+                        "sampling": 0.5,
+                        "events": ["http"]
                     }
                 }))
                 # don't expect any http logs

go.mod

@@ -23,9 +23,9 @@ require (
 	github.com/miekg/dns v1.1.50
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.13.0
+	github.com/prometheus/client_golang v1.19.1
-	github.com/prometheus/client_model v0.2.0
+	github.com/prometheus/client_model v0.5.0
-	github.com/quic-go/quic-go v0.42.0
+	github.com/quic-go/quic-go v0.45.0
 	github.com/rs/zerolog v1.20.0
 	github.com/stretchr/testify v1.9.0
 	github.com/urfave/cli/v2 v2.3.0
@@ -38,7 +38,7 @@ require (
 	go.uber.org/automaxprocs v1.4.0
 	golang.org/x/crypto v0.23.0
 	golang.org/x/net v0.25.0
-	golang.org/x/sync v0.6.0
+	golang.org/x/sync v0.7.0
 	golang.org/x/sys v0.20.0
 	golang.org/x/term v0.20.0
 	google.golang.org/protobuf v1.34.1
@@ -80,16 +80,16 @@ require (
 	github.com/onsi/ginkgo/v2 v2.9.5 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/common v0.37.0 // indirect
+	github.com/prometheus/common v0.48.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	go.opentelemetry.io/otel/metric v1.26.0 // indirect
 	go.uber.org/mock v0.4.0 // indirect
-	golang.org/x/exp v0.0.0-20221205204356-47842c84f3db // indirect
+	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 // indirect
-	golang.org/x/mod v0.11.0 // indirect
+	golang.org/x/mod v0.17.0 // indirect
 	golang.org/x/oauth2 v0.17.0 // indirect
 	golang.org/x/text v0.15.0 // indirect
-	golang.org/x/tools v0.9.1 // indirect
+	golang.org/x/tools v0.21.0 // indirect
 	google.golang.org/appengine v1.6.8 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20240227224415-6ceb2ff114de // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240227224415-6ceb2ff114de // indirect

go.sum

@@ -1,61 +1,15 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
-cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
-cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
-cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
-cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
-cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
-cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
-cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
-cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
-cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
-cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
-cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
-cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
-cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v1.2.0 h1:Rt8g24XnyGTyglgET/PRUNlrUeu9F5L+7FilkXfZgs0=
 github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/apparentlymart/go-cidr v1.1.0 h1:2mAhrMoF+nhXqxTzSZMUzDHkLjmIHC+Zzn4tdgBZjnU=
 github.com/apparentlymart/go-cidr v1.1.0/go.mod h1:EBcsNrHc3zQeuaeCeCtQruQm+n9/YjEn/vI25Lg7Gwc=
-github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/coredns/caddy v1.1.1 h1:2eYKZT7i6yxIfGP3qLJoJ7HAsDJqYB+X68g4NYjSrE0=
 github.com/coredns/caddy v1.1.1/go.mod h1:A6ntJQlAWuQfFlsd9hvigKbo2WS0VUs2l1e2F+BawD4=
 github.com/coredns/coredns v1.10.0 h1:jCfuWsBjTs0dapkkhISfPCzn5LqvSRtrFtaf/Tjj4DI=
@@ -72,10 +26,6 @@ github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ3
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
-github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51 h1:0JZ+dUmQeA8IIVUMzysrX4/AKuQwWhV2dYQuPZdvdSQ=
 github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51/go.mod h1:Yg+htXGokKKdzcwhuNDwVvN+uBxDGXJ7G/VN1d8fa64=
 github.com/facebookgo/freeport v0.0.0-20150612182905-d4adf43b75b9 h1:wWke/RUCl7VRjQhwPlR/v0glZXNYzBHdNUzf/Am2Nmg=
@@ -105,19 +55,8 @@ github.com/go-chi/cors v1.2.1 h1:xEC8UT3Rlp2QuWNEr4Fs/c2EAGVKBwy/1vHx3bppil4=
 github.com/go-chi/cors v1.2.1/go.mod h1:sSbTewc+6wYHBBCW7ytsFSn836hqM7JxpglAy2Vzc58=
 github.com/go-errors/errors v1.4.2 h1:J6MZopCL4uSllY1OfXM374weqZFFItUbrImctkmUxIA=
 github.com/go-errors/errors v1.4.2/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3BopGUQ5a5Og=
-github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
-github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
-github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-jose/go-jose/v4 v4.0.1 h1:QVEPDE3OluqXBQZDcnNvQrInro2h0e4eqNbnZSWqS6U=
 github.com/go-jose/go-jose/v4 v4.0.1/go.mod h1:WVf9LFMHh/QVrmqrOfqun0C45tMe3RoiKJMPvgWwLfY=
-github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
-github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
-github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
-github.com/go-kit/log v0.2.0/go.mod h1:NwTd00d/i8cPZ3xOwwiv2PO5MOcx78fFErGNcVmBjv0=
-github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
-github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
-github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
-github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
 github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
@@ -133,7 +72,6 @@ github.com/go-playground/universal-translator v0.18.0/go.mod h1:UvRDBj+xPUEGrFYl
 github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI=
 github.com/go-playground/validator/v10 v10.11.1 h1:prmOlTVv+YjZjmRmNSF3VmspqJIxJWXmqUsHwfTRRkQ=
 github.com/go-playground/validator/v10 v10.11.1/go.mod h1:i+3WkQ1FvaUjjxh1kSvIA4dMGDBiPU55YFDl0WbKdWU=
-github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
 github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee/go.mod h1:L0fX3K22YWvt/FAX9NnzrNzcI4wNYi9Yku4O0LKYflo=
@@ -148,48 +86,15 @@ github.com/gobwas/ws v1.0.4/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/E
 github.com/goccy/go-json v0.9.11 h1:/pAaQDLHEoCq/5FFmSKBswWmK6H0e8g4159Kc/X/nqk=
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-github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3 h1:zN2lZNZRflqFyxVaTIU61KNKQ9C0055u9CAfpmqUvo4=
 github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3/go.mod h1:nPpo7qLxd6XL3hWJG/O60sR8ZKfMCiIoNap5GvD12KU=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
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@@ -197,23 +102,11 @@ github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeN
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@@ -221,30 +114,15 @@ github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.1 h1:/c3QmbOGMGTOumP2iT/rCwB7b0Q
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@@ -272,11 +150,8 @@ github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJ
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
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@@ -289,40 +164,21 @@ github.com/philhofer/fwd v1.1.1 h1:GdGcTjf5RNAxwS4QLsiMzJYj5KEvPJD3Abr261yRQXQ=
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@@ -332,12 +188,7 @@ github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQD
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@@ -351,16 +202,8 @@ github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVM
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@@ -381,153 +224,45 @@ go.uber.org/automaxprocs v1.4.0 h1:CpDZl6aOlLhReez+8S3eEotD7Jx0Os++lemPlMULQP0=
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@@ -537,9 +272,7 @@ golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9sn
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@@ -547,178 +280,49 @@ golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
-google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
 google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
-gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 nhooyr.io/websocket v1.8.7 h1:usjR2uOr/zjjkVMy0lW+PPohFok7PCow5sDjLgX4P4g=
 nhooyr.io/websocket v1.8.7/go.mod h1:B70DZP8IakI65RVQ51MsWP/8jndNma26DVA/nFSCgW0=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
 zombiezen.com/go/capnproto2 v2.18.0+incompatible h1:mwfXZniffG5mXokQGHUJWGnqIBggoPfT/CEwon9Yess=
 zombiezen.com/go/capnproto2 v2.18.0+incompatible/go.mod h1:XO5Pr2SbXgqZwn0m0Ru54QBqpOf4K5AYBO+8LAOBQEQ=

quic/metrics.go

@@ -30,6 +30,9 @@ var (
 		minRTT            *prometheus.GaugeVec
 		latestRTT         *prometheus.GaugeVec
 		smoothedRTT       *prometheus.GaugeVec
+		mtu               *prometheus.GaugeVec
+		congestionWindow  *prometheus.GaugeVec
+		congestionState   *prometheus.GaugeVec
 	}{
 		totalConnections: prometheus.NewCounter(
 			prometheus.CounterOpts{
@@ -146,6 +149,33 @@ var (
 			},
 			clientConnLabels,
 		),
+		mtu: prometheus.NewGaugeVec(
+			prometheus.GaugeOpts{
+				Namespace: namespace,
+				Subsystem: "client",
+				Name:      "mtu",
+				Help:      "Current maximum transmission unit (MTU) of a connection",
+			},
+			clientConnLabels,
+		),
+		congestionWindow: prometheus.NewGaugeVec(
+			prometheus.GaugeOpts{
+				Namespace: namespace,
+				Subsystem: "client",
+				Name:      "congestion_window",
+				Help:      "Current congestion window size",
+			},
+			clientConnLabels,
+		),
+		congestionState: prometheus.NewGaugeVec(
+			prometheus.GaugeOpts{
+				Namespace: namespace,
+				Subsystem: "client",
+				Name:      "congestion_state",
+				Help:      "Current congestion control state. See https://pkg.go.dev/github.com/quic-go/quic-go@v0.45.0/logging#CongestionState for what each value maps to",
+			},
+			clientConnLabels,
+		),
 	}
 
 	registerClient = sync.Once{}
@@ -179,6 +209,9 @@ func newClientCollector(index string, logger *zerolog.Logger) *clientCollector {
 			clientMetrics.minRTT,
 			clientMetrics.latestRTT,
 			clientMetrics.smoothedRTT,
+			clientMetrics.mtu,
+			clientMetrics.congestionWindow,
+			clientMetrics.congestionState,
 			packetTooBigDropped,
 		)
 	})
@@ -232,6 +265,19 @@ func (cc *clientCollector) updatedRTT(rtt *logging.RTTStats) {
 	clientMetrics.smoothedRTT.WithLabelValues(cc.index).Set(durationToPromGauge(rtt.SmoothedRTT()))
 }
 
+func (cc *clientCollector) updateCongestionWindow(size logging.ByteCount) {
+	clientMetrics.congestionWindow.WithLabelValues(cc.index).Set(float64(size))
+}
+
+func (cc *clientCollector) updatedCongestionState(state logging.CongestionState) {
+	clientMetrics.congestionState.WithLabelValues(cc.index).Set(float64(state))
+}
+
+func (cc *clientCollector) updateMTU(mtu logging.ByteCount) {
+	clientMetrics.mtu.WithLabelValues(cc.index).Set(float64(mtu))
+	cc.logger.Debug().Msgf("QUIC MTU updated to %d", mtu)
+}
+
 func (cc *clientCollector) collectPackets(size logging.ByteCount, frames []logging.Frame, counter, bandwidth *prometheus.CounterVec, direction direction) {
 	for _, frame := range frames {
 		switch f := frame.(type) {

quic/tracing.go

@@ -47,6 +47,8 @@ func newConnTracer(metricsCollector *clientCollector) *logging.ConnectionTracer
 		DroppedPacket:               tracer.DroppedPacket,
 		UpdatedMetrics:              tracer.UpdatedMetrics,
 		LostPacket:                  tracer.LostPacket,
+		UpdatedMTU:                  tracer.UpdatedMTU,
+		UpdatedCongestionState:      tracer.UpdatedCongestionState,
 	}
 }
 
@@ -76,6 +78,7 @@ func (ct *connTracer) LostPacket(level logging.EncryptionLevel, number logging.P
 
 func (ct *connTracer) UpdatedMetrics(rttStats *logging.RTTStats, cwnd, bytesInFlight logging.ByteCount, packetsInFlight int) {
 	ct.metricsCollector.updatedRTT(rttStats)
+	ct.metricsCollector.updateCongestionWindow(cwnd)
 }
 
 func (ct *connTracer) SentLongHeaderPacket(hdr *logging.ExtendedHeader, size logging.ByteCount, ecn logging.ECN, ack *logging.AckFrame, frames []logging.Frame) {
@@ -93,3 +96,11 @@ func (ct *connTracer) ReceivedLongHeaderPacket(hdr *logging.ExtendedHeader, size
 func (ct *connTracer) ReceivedShortHeaderPacket(hdr *logging.ShortHeader, size logging.ByteCount, ecn logging.ECN, frames []logging.Frame) {
 	ct.metricsCollector.receivedPackets(size, frames)
 }
+
+func (ct *connTracer) UpdatedMTU(mtu logging.ByteCount, done bool) {
+	ct.metricsCollector.updateMTU(mtu)
+}
+
+func (ct *connTracer) UpdatedCongestionState(state logging.CongestionState) {
+	ct.metricsCollector.updatedCongestionState(state)
+}

supervisor/tunnel.go

@@ -569,6 +569,13 @@ func (e *EdgeTunnelServer) serveQUIC(
 
 	tlsConfig.CurvePreferences = curvePref
 
+	// quic-go 0.44 increases the initial packet size to 1280 by default. That breaks anyone running tunnel through WARP
+	// because WARP MTU is 1280.
+	var initialPacketSize uint16 = 1252
+	if edgeAddr.IP.To4() == nil {
+		initialPacketSize = 1232
+	}
+
 	quicConfig := &quic.Config{
 		HandshakeIdleTimeout:       quicpogs.HandshakeIdleTimeout,
 		MaxIdleTimeout:             quicpogs.MaxIdleTimeout,
@@ -580,6 +587,7 @@ func (e *EdgeTunnelServer) serveQUIC(
 		DisablePathMTUDiscovery:    e.config.DisableQUICPathMTUDiscovery,
 		MaxConnectionReceiveWindow: e.config.QUICConnectionLevelFlowControlLimit,
 		MaxStreamReceiveWindow:     e.config.QUICStreamLevelFlowControlLimit,
+		InitialPacketSize:          initialPacketSize,
 	}
 
 	quicConn, err := connection.NewQUICConnection(

vendor/github.com/golang/protobuf/ptypes/timestamp/timestamp.pb.go

@@ -1,64 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: github.com/golang/protobuf/ptypes/timestamp/timestamp.proto
-
-package timestamp
-
-import (
-	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
-	reflect "reflect"
-)
-
-// Symbols defined in public import of google/protobuf/timestamp.proto.
-
-type Timestamp = timestamppb.Timestamp
-
-var File_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto protoreflect.FileDescriptor
-
-var file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_rawDesc = []byte{
-	0x0a, 0x3b, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x6c,
-	0x61, 0x6e, 0x67, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x70, 0x74, 0x79,
-	0x70, 0x65, 0x73, 0x2f, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x2f, 0x74, 0x69,
-	0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x1f, 0x67,
-	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x74,
-	0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x42, 0x37,
-	0x5a, 0x35, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f, 0x6c,
-	0x61, 0x6e, 0x67, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x70, 0x74, 0x79,
-	0x70, 0x65, 0x73, 0x2f, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x3b, 0x74, 0x69,
-	0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x50, 0x00, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
-	0x33,
-}
-
-var file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_goTypes = []interface{}{}
-var file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
-}
-
-func init() { file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_init() }
-func file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_init() {
-	if File_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto != nil {
-		return
-	}
-	type x struct{}
-	out := protoimpl.TypeBuilder{
-		File: protoimpl.DescBuilder{
-			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_rawDesc,
-			NumEnums:      0,
-			NumMessages:   0,
-			NumExtensions: 0,
-			NumServices:   0,
-		},
-		GoTypes:           file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_goTypes,
-		DependencyIndexes: file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_depIdxs,
-	}.Build()
-	File_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto = out.File
-	file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_rawDesc = nil
-	file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_goTypes = nil
-	file_github_com_golang_protobuf_ptypes_timestamp_timestamp_proto_depIdxs = nil
-}

vendor/github.com/prometheus/client_golang/prometheus/counter.go

@@ -20,6 +20,7 @@ import (
 	"time"
 
 	dto "github.com/prometheus/client_model/go"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 // Counter is a Metric that represents a single numerical value that only ever
@@ -59,6 +60,18 @@ type ExemplarAdder interface {
 // CounterOpts is an alias for Opts. See there for doc comments.
 type CounterOpts Opts
 
+// CounterVecOpts bundles the options to create a CounterVec metric.
+// It is mandatory to set CounterOpts, see there for mandatory fields. VariableLabels
+// is optional and can safely be left to its default value.
+type CounterVecOpts struct {
+	CounterOpts
+
+	// VariableLabels are used to partition the metric vector by the given set
+	// of labels. Each label value will be constrained with the optional Constraint
+	// function, if provided.
+	VariableLabels ConstrainableLabels
+}
+
 // NewCounter creates a new Counter based on the provided CounterOpts.
 //
 // The returned implementation also implements ExemplarAdder. It is safe to
@@ -78,8 +91,12 @@ func NewCounter(opts CounterOpts) Counter {
 		nil,
 		opts.ConstLabels,
 	)
-	result := &counter{desc: desc, labelPairs: desc.constLabelPairs, now: time.Now}
+	if opts.now == nil {
+		opts.now = time.Now
+	}
+	result := &counter{desc: desc, labelPairs: desc.constLabelPairs, now: opts.now}
 	result.init(result) // Init self-collection.
+	result.createdTs = timestamppb.New(opts.now())
 	return result
 }
 
@@ -94,10 +111,12 @@ type counter struct {
 	selfCollector
 	desc *Desc
 
+	createdTs  *timestamppb.Timestamp
 	labelPairs []*dto.LabelPair
 	exemplar   atomic.Value // Containing nil or a *dto.Exemplar.
 
-	now func() time.Time // To mock out time.Now() for testing.
+	// now is for testing purposes, by default it's time.Now.
+	now func() time.Time
 }
 
 func (c *counter) Desc() *Desc {
@@ -140,14 +159,14 @@ func (c *counter) get() float64 {
 }
 
 func (c *counter) Write(out *dto.Metric) error {
-	val := c.get()
+	// Read the Exemplar first and the value second. This is to avoid a race condition
-
+	// where users see an exemplar for a not-yet-existing observation.
 	var exemplar *dto.Exemplar
 	if e := c.exemplar.Load(); e != nil {
 		exemplar = e.(*dto.Exemplar)
 	}
-
+	val := c.get()
-	return populateMetric(CounterValue, val, c.labelPairs, exemplar, out)
+	return populateMetric(CounterValue, val, c.labelPairs, exemplar, out, c.createdTs)
 }
 
 func (c *counter) updateExemplar(v float64, l Labels) {
@@ -173,19 +192,31 @@ type CounterVec struct {
 // NewCounterVec creates a new CounterVec based on the provided CounterOpts and
 // partitioned by the given label names.
 func NewCounterVec(opts CounterOpts, labelNames []string) *CounterVec {
-	desc := NewDesc(
+	return V2.NewCounterVec(CounterVecOpts{
+		CounterOpts:    opts,
+		VariableLabels: UnconstrainedLabels(labelNames),
+	})
+}
+
+// NewCounterVec creates a new CounterVec based on the provided CounterVecOpts.
+func (v2) NewCounterVec(opts CounterVecOpts) *CounterVec {
+	desc := V2.NewDesc(
 		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
 		opts.Help,
-		labelNames,
+		opts.VariableLabels,
 		opts.ConstLabels,
 	)
+	if opts.now == nil {
+		opts.now = time.Now
+	}
 	return &CounterVec{
 		MetricVec: NewMetricVec(desc, func(lvs ...string) Metric {
-			if len(lvs) != len(desc.variableLabels) {
+			if len(lvs) != len(desc.variableLabels.names) {
-				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs))
+				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels.names, lvs))
 			}
-			result := &counter{desc: desc, labelPairs: MakeLabelPairs(desc, lvs), now: time.Now}
+			result := &counter{desc: desc, labelPairs: MakeLabelPairs(desc, lvs), now: opts.now}
 			result.init(result) // Init self-collection.
+			result.createdTs = timestamppb.New(opts.now())
 			return result
 		}),
 	}
@@ -245,7 +276,8 @@ func (v *CounterVec) GetMetricWith(labels Labels) (Counter, error) {
 // WithLabelValues works as GetMetricWithLabelValues, but panics where
 // GetMetricWithLabelValues would have returned an error. Not returning an
 // error allows shortcuts like
-//     myVec.WithLabelValues("404", "GET").Add(42)
+//
+//	myVec.WithLabelValues("404", "GET").Add(42)
 func (v *CounterVec) WithLabelValues(lvs ...string) Counter {
 	c, err := v.GetMetricWithLabelValues(lvs...)
 	if err != nil {
@@ -256,7 +288,8 @@ func (v *CounterVec) WithLabelValues(lvs ...string) Counter {
 
 // With works as GetMetricWith, but panics where GetMetricWithLabels would have
 // returned an error. Not returning an error allows shortcuts like
-//     myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42)
+//
+//	myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42)
 func (v *CounterVec) With(labels Labels) Counter {
 	c, err := v.GetMetricWith(labels)
 	if err != nil {

vendor/github.com/prometheus/client_golang/prometheus/desc.go

@@ -14,20 +14,16 @@
 package prometheus
 
 import (
-	"errors"
 	"fmt"
 	"sort"
 	"strings"
 
 	"github.com/cespare/xxhash/v2"
+	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/common/model"
+	"google.golang.org/protobuf/proto"
 
 	"github.com/prometheus/client_golang/prometheus/internal"
-
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	"github.com/prometheus/common/model"
-
-	dto "github.com/prometheus/client_model/go"
 )
 
 // Desc is the descriptor used by every Prometheus Metric. It is essentially
@@ -54,9 +50,9 @@ type Desc struct {
 	// constLabelPairs contains precalculated DTO label pairs based on
 	// the constant labels.
 	constLabelPairs []*dto.LabelPair
-	// variableLabels contains names of labels for which the metric
+	// variableLabels contains names of labels and normalization function for
-	// maintains variable values.
+	// which the metric maintains variable values.
-	variableLabels []string
+	variableLabels *compiledLabels
 	// id is a hash of the values of the ConstLabels and fqName. This
 	// must be unique among all registered descriptors and can therefore be
 	// used as an identifier of the descriptor.
@@ -80,10 +76,24 @@ type Desc struct {
 // For constLabels, the label values are constant. Therefore, they are fully
 // specified in the Desc. See the Collector example for a usage pattern.
 func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *Desc {
+	return V2.NewDesc(fqName, help, UnconstrainedLabels(variableLabels), constLabels)
+}
+
+// NewDesc allocates and initializes a new Desc. Errors are recorded in the Desc
+// and will be reported on registration time. variableLabels and constLabels can
+// be nil if no such labels should be set. fqName must not be empty.
+//
+// variableLabels only contain the label names and normalization functions. Their
+// label values are variable and therefore not part of the Desc. (They are managed
+// within the Metric.)
+//
+// For constLabels, the label values are constant. Therefore, they are fully
+// specified in the Desc. See the Collector example for a usage pattern.
+func (v2) NewDesc(fqName, help string, variableLabels ConstrainableLabels, constLabels Labels) *Desc {
 	d := &Desc{
 		fqName:         fqName,
 		help:           help,
-		variableLabels: variableLabels,
+		variableLabels: variableLabels.compile(),
 	}
 	if !model.IsValidMetricName(model.LabelValue(fqName)) {
 		d.err = fmt.Errorf("%q is not a valid metric name", fqName)
@@ -93,7 +103,7 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *
 	// their sorted label names) plus the fqName (at position 0).
 	labelValues := make([]string, 1, len(constLabels)+1)
 	labelValues[0] = fqName
-	labelNames := make([]string, 0, len(constLabels)+len(variableLabels))
+	labelNames := make([]string, 0, len(constLabels)+len(d.variableLabels.names))
 	labelNameSet := map[string]struct{}{}
 	// First add only the const label names and sort them...
 	for labelName := range constLabels {
@@ -118,16 +128,16 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *
 	// Now add the variable label names, but prefix them with something that
 	// cannot be in a regular label name. That prevents matching the label
 	// dimension with a different mix between preset and variable labels.
-	for _, labelName := range variableLabels {
+	for _, label := range d.variableLabels.names {
-		if !checkLabelName(labelName) {
+		if !checkLabelName(label) {
-			d.err = fmt.Errorf("%q is not a valid label name for metric %q", labelName, fqName)
+			d.err = fmt.Errorf("%q is not a valid label name for metric %q", label, fqName)
 			return d
 		}
-		labelNames = append(labelNames, "$"+labelName)
+		labelNames = append(labelNames, "$"+label)
-		labelNameSet[labelName] = struct{}{}
+		labelNameSet[label] = struct{}{}
 	}
 	if len(labelNames) != len(labelNameSet) {
-		d.err = errors.New("duplicate label names")
+		d.err = fmt.Errorf("duplicate label names in constant and variable labels for metric %q", fqName)
 		return d
 	}
 
@@ -179,11 +189,19 @@ func (d *Desc) String() string {
 			fmt.Sprintf("%s=%q", lp.GetName(), lp.GetValue()),
 		)
 	}
+	vlStrings := make([]string, 0, len(d.variableLabels.names))
+	for _, vl := range d.variableLabels.names {
+		if fn, ok := d.variableLabels.labelConstraints[vl]; ok && fn != nil {
+			vlStrings = append(vlStrings, fmt.Sprintf("c(%s)", vl))
+		} else {
+			vlStrings = append(vlStrings, vl)
+		}
+	}
 	return fmt.Sprintf(
-		"Desc{fqName: %q, help: %q, constLabels: {%s}, variableLabels: %v}",
+		"Desc{fqName: %q, help: %q, constLabels: {%s}, variableLabels: {%s}}",
 		d.fqName,
 		d.help,
 		strings.Join(lpStrings, ","),
-		d.variableLabels,
+		strings.Join(vlStrings, ","),
 	)
 }

vendor/github.com/prometheus/client_golang/prometheus/doc.go

@@ -21,55 +21,66 @@
 // All exported functions and methods are safe to be used concurrently unless
 // specified otherwise.
 //
-// A Basic Example
+// # A Basic Example
 //
 // As a starting point, a very basic usage example:
 //
-//    package main
+//	package main
 //
-//    import (
+//	import (
-//    	"log"
+//		"log"
-//    	"net/http"
+//		"net/http"
 //
-//    	"github.com/prometheus/client_golang/prometheus"
+//		"github.com/prometheus/client_golang/prometheus"
-//    	"github.com/prometheus/client_golang/prometheus/promhttp"
+//		"github.com/prometheus/client_golang/prometheus/promhttp"
-//    )
+//	)
 //
-//    var (
+//	type metrics struct {
-//    	cpuTemp = prometheus.NewGauge(prometheus.GaugeOpts{
+//		cpuTemp  prometheus.Gauge
-//    		Name: "cpu_temperature_celsius",
+//		hdFailures *prometheus.CounterVec
-//    		Help: "Current temperature of the CPU.",
+//	}
-//    	})
-//    	hdFailures = prometheus.NewCounterVec(
-//    		prometheus.CounterOpts{
-//    			Name: "hd_errors_total",
-//    			Help: "Number of hard-disk errors.",
-//    		},
-//    		[]string{"device"},
-//    	)
-//    )
 //
-//    func init() {
+//	func NewMetrics(reg prometheus.Registerer) *metrics {
-//    	// Metrics have to be registered to be exposed:
+//		m := &metrics{
-//    	prometheus.MustRegister(cpuTemp)
+//			cpuTemp: prometheus.NewGauge(prometheus.GaugeOpts{
-//    	prometheus.MustRegister(hdFailures)
+//				Name: "cpu_temperature_celsius",
-//    }
+//				Help: "Current temperature of the CPU.",
+//			}),
+//			hdFailures: prometheus.NewCounterVec(
+//				prometheus.CounterOpts{
+//					Name: "hd_errors_total",
+//					Help: "Number of hard-disk errors.",
+//				},
+//				[]string{"device"},
+//			),
+//		}
+//		reg.MustRegister(m.cpuTemp)
+//		reg.MustRegister(m.hdFailures)
+//		return m
+//	}
 //
-//    func main() {
+//	func main() {
-//    	cpuTemp.Set(65.3)
+//		// Create a non-global registry.
-//    	hdFailures.With(prometheus.Labels{"device":"/dev/sda"}).Inc()
+//		reg := prometheus.NewRegistry()
 //
-//    	// The Handler function provides a default handler to expose metrics
+//		// Create new metrics and register them using the custom registry.
-//    	// via an HTTP server. "/metrics" is the usual endpoint for that.
+//		m := NewMetrics(reg)
-//    	http.Handle("/metrics", promhttp.Handler())
+//		// Set values for the new created metrics.
-//    	log.Fatal(http.ListenAndServe(":8080", nil))
+//		m.cpuTemp.Set(65.3)
-//    }
+//		m.hdFailures.With(prometheus.Labels{"device":"/dev/sda"}).Inc()
 //
+//		// Expose metrics and custom registry via an HTTP server
+//		// using the HandleFor function. "/metrics" is the usual endpoint for that.
+//		http.Handle("/metrics", promhttp.HandlerFor(reg, promhttp.HandlerOpts{Registry: reg}))
+//		log.Fatal(http.ListenAndServe(":8080", nil))
+//	}
 //
 // This is a complete program that exports two metrics, a Gauge and a Counter,
 // the latter with a label attached to turn it into a (one-dimensional) vector.
+// It register the metrics using a custom registry and exposes them via an HTTP server
+// on the /metrics endpoint.
 //
-// Metrics
+// # Metrics
 //
 // The number of exported identifiers in this package might appear a bit
 // overwhelming. However, in addition to the basic plumbing shown in the example
@@ -100,7 +111,7 @@
 // To create instances of Metrics and their vector versions, you need a suitable
 // …Opts struct, i.e. GaugeOpts, CounterOpts, SummaryOpts, or HistogramOpts.
 //
-// Custom Collectors and constant Metrics
+// # Custom Collectors and constant Metrics
 //
 // While you could create your own implementations of Metric, most likely you
 // will only ever implement the Collector interface on your own. At a first
@@ -141,7 +152,7 @@
 // a metric, GaugeFunc, CounterFunc, or UntypedFunc might be interesting
 // shortcuts.
 //
-// Advanced Uses of the Registry
+// # Advanced Uses of the Registry
 //
 // While MustRegister is the by far most common way of registering a Collector,
 // sometimes you might want to handle the errors the registration might cause.
@@ -176,23 +187,23 @@
 // NewProcessCollector). With a custom registry, you are in control and decide
 // yourself about the Collectors to register.
 //
-// HTTP Exposition
+// # HTTP Exposition
 //
 // The Registry implements the Gatherer interface. The caller of the Gather
 // method can then expose the gathered metrics in some way. Usually, the metrics
 // are served via HTTP on the /metrics endpoint. That's happening in the example
 // above. The tools to expose metrics via HTTP are in the promhttp sub-package.
 //
-// Pushing to the Pushgateway
+// # Pushing to the Pushgateway
 //
 // Function for pushing to the Pushgateway can be found in the push sub-package.
 //
-// Graphite Bridge
+// # Graphite Bridge
 //
 // Functions and examples to push metrics from a Gatherer to Graphite can be
 // found in the graphite sub-package.
 //
-// Other Means of Exposition
+// # Other Means of Exposition
 //
 // More ways of exposing metrics can easily be added by following the approaches
 // of the existing implementations.

vendor/github.com/prometheus/client_golang/prometheus/expvar_collector.go

@@ -48,7 +48,7 @@ func (e *expvarCollector) Collect(ch chan<- Metric) {
 			continue
 		}
 		var v interface{}
-		labels := make([]string, len(desc.variableLabels))
+		labels := make([]string, len(desc.variableLabels.names))
 		if err := json.Unmarshal([]byte(expVar.String()), &v); err != nil {
 			ch <- NewInvalidMetric(desc, err)
 			continue

vendor/github.com/prometheus/client_golang/prometheus/gauge.go

@@ -55,6 +55,18 @@ type Gauge interface {
 // GaugeOpts is an alias for Opts. See there for doc comments.
 type GaugeOpts Opts
 
+// GaugeVecOpts bundles the options to create a GaugeVec metric.
+// It is mandatory to set GaugeOpts, see there for mandatory fields. VariableLabels
+// is optional and can safely be left to its default value.
+type GaugeVecOpts struct {
+	GaugeOpts
+
+	// VariableLabels are used to partition the metric vector by the given set
+	// of labels. Each label value will be constrained with the optional Constraint
+	// function, if provided.
+	VariableLabels ConstrainableLabels
+}
+
 // NewGauge creates a new Gauge based on the provided GaugeOpts.
 //
 // The returned implementation is optimized for a fast Set method. If you have a
@@ -123,7 +135,7 @@ func (g *gauge) Sub(val float64) {
 
 func (g *gauge) Write(out *dto.Metric) error {
 	val := math.Float64frombits(atomic.LoadUint64(&g.valBits))
-	return populateMetric(GaugeValue, val, g.labelPairs, nil, out)
+	return populateMetric(GaugeValue, val, g.labelPairs, nil, out, nil)
 }
 
 // GaugeVec is a Collector that bundles a set of Gauges that all share the same
@@ -138,16 +150,24 @@ type GaugeVec struct {
 // NewGaugeVec creates a new GaugeVec based on the provided GaugeOpts and
 // partitioned by the given label names.
 func NewGaugeVec(opts GaugeOpts, labelNames []string) *GaugeVec {
-	desc := NewDesc(
+	return V2.NewGaugeVec(GaugeVecOpts{
+		GaugeOpts:      opts,
+		VariableLabels: UnconstrainedLabels(labelNames),
+	})
+}
+
+// NewGaugeVec creates a new GaugeVec based on the provided GaugeVecOpts.
+func (v2) NewGaugeVec(opts GaugeVecOpts) *GaugeVec {
+	desc := V2.NewDesc(
 		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
 		opts.Help,
-		labelNames,
+		opts.VariableLabels,
 		opts.ConstLabels,
 	)
 	return &GaugeVec{
 		MetricVec: NewMetricVec(desc, func(lvs ...string) Metric {
-			if len(lvs) != len(desc.variableLabels) {
+			if len(lvs) != len(desc.variableLabels.names) {
-				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs))
+				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels.names, lvs))
 			}
 			result := &gauge{desc: desc, labelPairs: MakeLabelPairs(desc, lvs)}
 			result.init(result) // Init self-collection.
@@ -210,7 +230,8 @@ func (v *GaugeVec) GetMetricWith(labels Labels) (Gauge, error) {
 // WithLabelValues works as GetMetricWithLabelValues, but panics where
 // GetMetricWithLabelValues would have returned an error. Not returning an
 // error allows shortcuts like
-//     myVec.WithLabelValues("404", "GET").Add(42)
+//
+//	myVec.WithLabelValues("404", "GET").Add(42)
 func (v *GaugeVec) WithLabelValues(lvs ...string) Gauge {
 	g, err := v.GetMetricWithLabelValues(lvs...)
 	if err != nil {
@@ -221,7 +242,8 @@ func (v *GaugeVec) WithLabelValues(lvs ...string) Gauge {
 
 // With works as GetMetricWith, but panics where GetMetricWithLabels would have
 // returned an error. Not returning an error allows shortcuts like
-//     myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42)
+//
+//	myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Add(42)
 func (v *GaugeVec) With(labels Labels) Gauge {
 	g, err := v.GetMetricWith(labels)
 	if err != nil {

vendor/github.com/prometheus/client_golang/prometheus/go_collector_latest.go

@@ -23,11 +23,10 @@ import (
 	"strings"
 	"sync"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	dto "github.com/prometheus/client_model/go"
-
 	"github.com/prometheus/client_golang/prometheus/internal"
+
+	dto "github.com/prometheus/client_model/go"
+	"google.golang.org/protobuf/proto"
 )
 
 const (

vendor/github.com/prometheus/client_golang/prometheus/internal/almost_equal.go

@@ -0,0 +1,60 @@
+// Copyright (c) 2015 Björn Rabenstein
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// The code in this package is copy/paste to avoid a dependency. Hence this file
+// carries the copyright of the original repo.
+// https://github.com/beorn7/floats
+package internal
+
+import (
+	"math"
+)
+
+// minNormalFloat64 is the smallest positive normal value of type float64.
+var minNormalFloat64 = math.Float64frombits(0x0010000000000000)
+
+// AlmostEqualFloat64 returns true if a and b are equal within a relative error
+// of epsilon. See http://floating-point-gui.de/errors/comparison/ for the
+// details of the applied method.
+func AlmostEqualFloat64(a, b, epsilon float64) bool {
+	if a == b {
+		return true
+	}
+	absA := math.Abs(a)
+	absB := math.Abs(b)
+	diff := math.Abs(a - b)
+	if a == 0 || b == 0 || absA+absB < minNormalFloat64 {
+		return diff < epsilon*minNormalFloat64
+	}
+	return diff/math.Min(absA+absB, math.MaxFloat64) < epsilon
+}
+
+// AlmostEqualFloat64s is the slice form of AlmostEqualFloat64.
+func AlmostEqualFloat64s(a, b []float64, epsilon float64) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := range a {
+		if !AlmostEqualFloat64(a[i], b[i], epsilon) {
+			return false
+		}
+	}
+	return true
+}

vendor/github.com/prometheus/client_golang/prometheus/internal/difflib.go

@@ -14,7 +14,7 @@
 // It provides tools to compare sequences of strings and generate textual diffs.
 //
 // Maintaining `GetUnifiedDiffString` here because original repository
-// (https://github.com/pmezard/go-difflib) is no loger maintained.
+// (https://github.com/pmezard/go-difflib) is no longer maintained.
 package internal
 
 import (
@@ -201,12 +201,15 @@ func (m *SequenceMatcher) isBJunk(s string) bool {
 // If IsJunk is not defined:
 //
 // Return (i,j,k) such that a[i:i+k] is equal to b[j:j+k], where
-//     alo <= i <= i+k <= ahi
+//
-//     blo <= j <= j+k <= bhi
+//	alo <= i <= i+k <= ahi
+//	blo <= j <= j+k <= bhi
+//
 // and for all (i',j',k') meeting those conditions,
-//     k >= k'
+//
-//     i <= i'
+//	k >= k'
-//     and if i == i', j <= j'
+//	i <= i'
+//	and if i == i', j <= j'
 //
 // In other words, of all maximal matching blocks, return one that
 // starts earliest in a, and of all those maximal matching blocks that

vendor/github.com/prometheus/client_golang/prometheus/labels.go

@@ -25,12 +25,111 @@ import (
 // Labels represents a collection of label name -> value mappings. This type is
 // commonly used with the With(Labels) and GetMetricWith(Labels) methods of
 // metric vector Collectors, e.g.:
-//     myVec.With(Labels{"code": "404", "method": "GET"}).Add(42)
+//
+//	myVec.With(Labels{"code": "404", "method": "GET"}).Add(42)
 //
 // The other use-case is the specification of constant label pairs in Opts or to
 // create a Desc.
 type Labels map[string]string
 
+// LabelConstraint normalizes label values.
+type LabelConstraint func(string) string
+
+// ConstrainedLabels represents a label name and its constrain function
+// to normalize label values. This type is commonly used when constructing
+// metric vector Collectors.
+type ConstrainedLabel struct {
+	Name       string
+	Constraint LabelConstraint
+}
+
+// ConstrainableLabels is an interface that allows creating of labels that can
+// be optionally constrained.
+//
+//	prometheus.V2().NewCounterVec(CounterVecOpts{
+//	  CounterOpts: {...}, // Usual CounterOpts fields
+//	  VariableLabels: []ConstrainedLabels{
+//	    {Name: "A"},
+//	    {Name: "B", Constraint: func(v string) string { ... }},
+//	  },
+//	})
+type ConstrainableLabels interface {
+	compile() *compiledLabels
+	labelNames() []string
+}
+
+// ConstrainedLabels represents a collection of label name -> constrain function
+// to normalize label values. This type is commonly used when constructing
+// metric vector Collectors.
+type ConstrainedLabels []ConstrainedLabel
+
+func (cls ConstrainedLabels) compile() *compiledLabels {
+	compiled := &compiledLabels{
+		names:            make([]string, len(cls)),
+		labelConstraints: map[string]LabelConstraint{},
+	}
+
+	for i, label := range cls {
+		compiled.names[i] = label.Name
+		if label.Constraint != nil {
+			compiled.labelConstraints[label.Name] = label.Constraint
+		}
+	}
+
+	return compiled
+}
+
+func (cls ConstrainedLabels) labelNames() []string {
+	names := make([]string, len(cls))
+	for i, label := range cls {
+		names[i] = label.Name
+	}
+	return names
+}
+
+// UnconstrainedLabels represents collection of label without any constraint on
+// their value. Thus, it is simply a collection of label names.
+//
+//	UnconstrainedLabels([]string{ "A", "B" })
+//
+// is equivalent to
+//
+//	ConstrainedLabels {
+//	  { Name: "A" },
+//	  { Name: "B" },
+//	}
+type UnconstrainedLabels []string
+
+func (uls UnconstrainedLabels) compile() *compiledLabels {
+	return &compiledLabels{
+		names: uls,
+	}
+}
+
+func (uls UnconstrainedLabels) labelNames() []string {
+	return uls
+}
+
+type compiledLabels struct {
+	names            []string
+	labelConstraints map[string]LabelConstraint
+}
+
+func (cls *compiledLabels) compile() *compiledLabels {
+	return cls
+}
+
+func (cls *compiledLabels) labelNames() []string {
+	return cls.names
+}
+
+func (cls *compiledLabels) constrain(labelName, value string) string {
+	if fn, ok := cls.labelConstraints[labelName]; ok && fn != nil {
+		return fn(value)
+	}
+	return value
+}
+
 // reservedLabelPrefix is a prefix which is not legal in user-supplied
 // label names.
 const reservedLabelPrefix = "__"
@@ -66,6 +165,8 @@ func validateValuesInLabels(labels Labels, expectedNumberOfValues int) error {
 
 func validateLabelValues(vals []string, expectedNumberOfValues int) error {
 	if len(vals) != expectedNumberOfValues {
+		// The call below makes vals escape, copy them to avoid that.
+		vals := append([]string(nil), vals...)
 		return fmt.Errorf(
 			"%w: expected %d label values but got %d in %#v",
 			errInconsistentCardinality, expectedNumberOfValues,

vendor/github.com/prometheus/client_golang/prometheus/metric.go

@@ -20,11 +20,9 @@ import (
 	"strings"
 	"time"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	"github.com/prometheus/common/model"
-
 	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/common/model"
+	"google.golang.org/protobuf/proto"
 )
 
 var separatorByteSlice = []byte{model.SeparatorByte} // For convenient use with xxhash.
@@ -94,6 +92,9 @@ type Opts struct {
 	// machine_role metric). See also
 	// https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels-not-static-scraped-labels
 	ConstLabels Labels
+
+	// now is for testing purposes, by default it's time.Now.
+	now func() time.Time
 }
 
 // BuildFQName joins the given three name components by "_". Empty name
@@ -187,7 +188,7 @@ func (m *withExemplarsMetric) Write(pb *dto.Metric) error {
 			} else {
 				// The +Inf bucket should be explicitly added if there is an exemplar for it, similar to non-const histogram logic in https://github.com/prometheus/client_golang/blob/main/prometheus/histogram.go#L357-L365.
 				b := &dto.Bucket{
-					CumulativeCount: proto.Uint64(pb.Histogram.Bucket[len(pb.Histogram.GetBucket())-1].GetCumulativeCount()),
+					CumulativeCount: proto.Uint64(pb.Histogram.GetSampleCount()),
 					UpperBound:      proto.Float64(math.Inf(1)),
 					Exemplar:        e,
 				}

vendor/github.com/prometheus/client_golang/prometheus/process_collector_other.go

@@ -11,8 +11,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !windows && !js
+//go:build !windows && !js && !wasip1
-// +build !windows,!js
+// +build !windows,!js,!wasip1
 
 package prometheus
 

vendor/github.com/prometheus/client_golang/prometheus/process_collector_wasip1.go

@@ -0,0 +1,26 @@
+// Copyright 2023 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build wasip1
+// +build wasip1
+
+package prometheus
+
+func canCollectProcess() bool {
+	return false
+}
+
+func (*processCollector) processCollect(chan<- Metric) {
+	// noop on this platform
+	return
+}

vendor/github.com/prometheus/client_golang/prometheus/promauto/auto.go

@@ -14,114 +14,114 @@
 // Package promauto provides alternative constructors for the fundamental
 // Prometheus metric types and their …Vec and …Func variants. The difference to
 // their counterparts in the prometheus package is that the promauto
-// constructors return Collectors that are already registered with a
+// constructors register the Collectors with a registry before returning them.
-// registry. There are two sets of constructors. The constructors in the first
+// There are two sets of constructors. The constructors in the first set are
-// set are top-level functions, while the constructors in the other set are
+// top-level functions, while the constructors in the other set are methods of
-// methods of the Factory type. The top-level function return Collectors
+// the Factory type. The top-level functions return Collectors registered with
-// registered with the global registry (prometheus.DefaultRegisterer), while the
+// the global registry (prometheus.DefaultRegisterer), while the methods return
-// methods return Collectors registered with the registry the Factory was
+// Collectors registered with the registry the Factory was constructed with. All
-// constructed with. All constructors panic if the registration fails.
+// constructors panic if the registration fails.
 //
 // The following example is a complete program to create a histogram of normally
 // distributed random numbers from the math/rand package:
 //
-//      package main
+//	package main
 //
-//      import (
+//	import (
-//              "math/rand"
+//		"math/rand"
-//              "net/http"
+//		"net/http"
 //
-//              "github.com/prometheus/client_golang/prometheus"
+//		"github.com/prometheus/client_golang/prometheus"
-//              "github.com/prometheus/client_golang/prometheus/promauto"
+//		"github.com/prometheus/client_golang/prometheus/promauto"
-//              "github.com/prometheus/client_golang/prometheus/promhttp"
+//		"github.com/prometheus/client_golang/prometheus/promhttp"
-//      )
+//	)
 //
-//      var histogram = promauto.NewHistogram(prometheus.HistogramOpts{
+//	var histogram = promauto.NewHistogram(prometheus.HistogramOpts{
-//              Name:    "random_numbers",
+//		Name:    "random_numbers",
-//              Help:    "A histogram of normally distributed random numbers.",
+//		Help:    "A histogram of normally distributed random numbers.",
-//              Buckets: prometheus.LinearBuckets(-3, .1, 61),
+//		Buckets: prometheus.LinearBuckets(-3, .1, 61),
-//      })
+//	})
 //
-//      func Random() {
+//	func Random() {
-//              for {
+//		for {
-//                      histogram.Observe(rand.NormFloat64())
+//			histogram.Observe(rand.NormFloat64())
-//              }
+//		}
-//      }
+//	}
 //
-//      func main() {
+//	func main() {
-//              go Random()
+//		go Random()
-//              http.Handle("/metrics", promhttp.Handler())
+//		http.Handle("/metrics", promhttp.Handler())
-//              http.ListenAndServe(":1971", nil)
+//		http.ListenAndServe(":1971", nil)
-//      }
+//	}
 //
 // Prometheus's version of a minimal hello-world program:
 //
-//      package main
+//	package main
 //
-//      import (
+//	import (
-//      	"fmt"
+//		"fmt"
-//      	"net/http"
+//		"net/http"
 //
-//      	"github.com/prometheus/client_golang/prometheus"
+//		"github.com/prometheus/client_golang/prometheus"
-//      	"github.com/prometheus/client_golang/prometheus/promauto"
+//		"github.com/prometheus/client_golang/prometheus/promauto"
-//      	"github.com/prometheus/client_golang/prometheus/promhttp"
+//		"github.com/prometheus/client_golang/prometheus/promhttp"
-//      )
+//	)
 //
-//      func main() {
+//	func main() {
-//      	http.Handle("/", promhttp.InstrumentHandlerCounter(
+//		http.Handle("/", promhttp.InstrumentHandlerCounter(
-//      		promauto.NewCounterVec(
+//			promauto.NewCounterVec(
-//      			prometheus.CounterOpts{
+//				prometheus.CounterOpts{
-//      				Name: "hello_requests_total",
+//					Name: "hello_requests_total",
-//      				Help: "Total number of hello-world requests by HTTP code.",
+//					Help: "Total number of hello-world requests by HTTP code.",
-//      			},
+//				},
-//      			[]string{"code"},
+//				[]string{"code"},
-//      		),
+//			),
-//      		http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+//			http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-//      			fmt.Fprint(w, "Hello, world!")
+//				fmt.Fprint(w, "Hello, world!")
-//      		}),
+//			}),
-//      	))
+//		))
-//      	http.Handle("/metrics", promhttp.Handler())
+//		http.Handle("/metrics", promhttp.Handler())
-//      	http.ListenAndServe(":1971", nil)
+//		http.ListenAndServe(":1971", nil)
-//      }
+//	}
 //
 // A Factory is created with the With(prometheus.Registerer) function, which
-// enables two usage pattern. With(prometheus.Registerer) can be called once per
+// enables two usage patterns. With(prometheus.Registerer) can be called once per
 // line:
 //
-//        var (
+//	var (
-//        	reg           = prometheus.NewRegistry()
+//		reg           = prometheus.NewRegistry()
-//        	randomNumbers = promauto.With(reg).NewHistogram(prometheus.HistogramOpts{
+//		randomNumbers = promauto.With(reg).NewHistogram(prometheus.HistogramOpts{
-//        		Name:    "random_numbers",
+//			Name:    "random_numbers",
-//        		Help:    "A histogram of normally distributed random numbers.",
+//			Help:    "A histogram of normally distributed random numbers.",
-//        		Buckets: prometheus.LinearBuckets(-3, .1, 61),
+//			Buckets: prometheus.LinearBuckets(-3, .1, 61),
-//        	})
+//		})
-//        	requestCount = promauto.With(reg).NewCounterVec(
+//		requestCount = promauto.With(reg).NewCounterVec(
-//        		prometheus.CounterOpts{
+//			prometheus.CounterOpts{
-//        			Name: "http_requests_total",
+//				Name: "http_requests_total",
-//        			Help: "Total number of HTTP requests by status code and method.",
+//				Help: "Total number of HTTP requests by status code and method.",
-//        		},
+//			},
-//        		[]string{"code", "method"},
+//			[]string{"code", "method"},
-//        	)
+//		)
-//        )
+//	)
 //
 // Or it can be used to create a Factory once to be used multiple times:
 //
-//        var (
+//	var (
-//        	reg           = prometheus.NewRegistry()
+//		reg           = prometheus.NewRegistry()
-//        	factory       = promauto.With(reg)
+//		factory       = promauto.With(reg)
-//        	randomNumbers = factory.NewHistogram(prometheus.HistogramOpts{
+//		randomNumbers = factory.NewHistogram(prometheus.HistogramOpts{
-//        		Name:    "random_numbers",
+//			Name:    "random_numbers",
-//        		Help:    "A histogram of normally distributed random numbers.",
+//			Help:    "A histogram of normally distributed random numbers.",
-//        		Buckets: prometheus.LinearBuckets(-3, .1, 61),
+//			Buckets: prometheus.LinearBuckets(-3, .1, 61),
-//        	})
+//		})
-//        	requestCount = factory.NewCounterVec(
+//		requestCount = factory.NewCounterVec(
-//        		prometheus.CounterOpts{
+//			prometheus.CounterOpts{
-//        			Name: "http_requests_total",
+//				Name: "http_requests_total",
-//        			Help: "Total number of HTTP requests by status code and method.",
+//				Help: "Total number of HTTP requests by status code and method.",
-//        		},
+//			},
-//        		[]string{"code", "method"},
+//			[]string{"code", "method"},
-//        	)
+//		)
-//        )
+//	)
 //
 // This appears very handy. So why are these constructors locked away in a
 // separate package?
@@ -153,7 +153,7 @@
 // importing a package.
 //
 // A separate package allows conservative users to entirely ignore it. And
-// whoever wants to use it, will do so explicitly, with an opportunity to read
+// whoever wants to use it will do so explicitly, with an opportunity to read
 // this warning.
 //
 // Enjoy promauto responsibly!

vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go

@@ -37,6 +37,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -47,9 +48,10 @@ import (
 )
 
 const (
-	contentTypeHeader     = "Content-Type"
+	contentTypeHeader      = "Content-Type"
-	contentEncodingHeader = "Content-Encoding"
+	contentEncodingHeader  = "Content-Encoding"
-	acceptEncodingHeader  = "Accept-Encoding"
+	acceptEncodingHeader   = "Accept-Encoding"
+	processStartTimeHeader = "Process-Start-Time-Unix"
 )
 
 var gzipPool = sync.Pool{
@@ -121,6 +123,9 @@ func HandlerForTransactional(reg prometheus.TransactionalGatherer, opts HandlerO
 	}
 
 	h := http.HandlerFunc(func(rsp http.ResponseWriter, req *http.Request) {
+		if !opts.ProcessStartTime.IsZero() {
+			rsp.Header().Set(processStartTimeHeader, strconv.FormatInt(opts.ProcessStartTime.Unix(), 10))
+		}
 		if inFlightSem != nil {
 			select {
 			case inFlightSem <- struct{}{}: // All good, carry on.
@@ -366,6 +371,14 @@ type HandlerOpts struct {
 	// (which changes the identity of the resulting series on the Prometheus
 	// server).
 	EnableOpenMetrics bool
+	// ProcessStartTime allows setting process start timevalue that will be exposed
+	// with "Process-Start-Time-Unix" response header along with the metrics
+	// payload. This allow callers to have efficient transformations to cumulative
+	// counters (e.g. OpenTelemetry) or generally _created timestamp estimation per
+	// scrape target.
+	// NOTE: This feature is experimental and not covered by OpenMetrics or Prometheus
+	// exposition format.
+	ProcessStartTime time.Time
 }
 
 // gzipAccepted returns whether the client will accept gzip-encoded content.

vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go

@@ -68,17 +68,17 @@ func InstrumentRoundTripperCounter(counter *prometheus.CounterVec, next http.Rou
 		o.apply(rtOpts)
 	}
 
-	code, method := checkLabels(counter)
+	// Curry the counter with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(counter.MustCurryWith(rtOpts.emptyDynamicLabels()))
 
 	return func(r *http.Request) (*http.Response, error) {
 		resp, err := next.RoundTrip(r)
 		if err == nil {
-			exemplarAdd(
+			l := labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)
-				counter.With(labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)),
+			for label, resolve := range rtOpts.extraLabelsFromCtx {
-				1,
+				l[label] = resolve(resp.Request.Context())
-				rtOpts.getExemplarFn(r.Context()),
+			}
-			)
+			addWithExemplar(counter.With(l), 1, rtOpts.getExemplarFn(r.Context()))
-			counter.With(labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)).Inc()
 		}
 		return resp, err
 	}
@@ -111,17 +111,18 @@ func InstrumentRoundTripperDuration(obs prometheus.ObserverVec, next http.RoundT
 		o.apply(rtOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(rtOpts.emptyDynamicLabels()))
 
 	return func(r *http.Request) (*http.Response, error) {
 		start := time.Now()
 		resp, err := next.RoundTrip(r)
 		if err == nil {
-			exemplarObserve(
+			l := labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)
-				obs.With(labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)),
+			for label, resolve := range rtOpts.extraLabelsFromCtx {
-				time.Since(start).Seconds(),
+				l[label] = resolve(resp.Request.Context())
-				rtOpts.getExemplarFn(r.Context()),
+			}
-			)
+			observeWithExemplar(obs.With(l), time.Since(start).Seconds(), rtOpts.getExemplarFn(r.Context()))
 		}
 		return resp, err
 	}

vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go

@@ -28,7 +28,9 @@ import (
 // magicString is used for the hacky label test in checkLabels. Remove once fixed.
 const magicString = "zZgWfBxLqvG8kc8IMv3POi2Bb0tZI3vAnBx+gBaFi9FyPzB/CzKUer1yufDa"
 
-func exemplarObserve(obs prometheus.Observer, val float64, labels map[string]string) {
+// observeWithExemplar is a wrapper for [prometheus.ExemplarAdder.ExemplarObserver],
+// which falls back to [prometheus.Observer.Observe] if no labels are provided.
+func observeWithExemplar(obs prometheus.Observer, val float64, labels map[string]string) {
 	if labels == nil {
 		obs.Observe(val)
 		return
@@ -36,7 +38,9 @@ func exemplarObserve(obs prometheus.Observer, val float64, labels map[string]str
 	obs.(prometheus.ExemplarObserver).ObserveWithExemplar(val, labels)
 }
 
-func exemplarAdd(obs prometheus.Counter, val float64, labels map[string]string) {
+// addWithExemplar is a wrapper for [prometheus.ExemplarAdder.AddWithExemplar],
+// which falls back to [prometheus.Counter.Add] if no labels are provided.
+func addWithExemplar(obs prometheus.Counter, val float64, labels map[string]string) {
 	if labels == nil {
 		obs.Add(val)
 		return
@@ -83,7 +87,8 @@ func InstrumentHandlerDuration(obs prometheus.ObserverVec, next http.Handler, op
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(hOpts.emptyDynamicLabels()))
 
 	if code {
 		return func(w http.ResponseWriter, r *http.Request) {
@@ -91,23 +96,22 @@ func InstrumentHandlerDuration(obs prometheus.ObserverVec, next http.Handler, op
 			d := newDelegator(w, nil)
 			next.ServeHTTP(d, r)
 
-			exemplarObserve(
+			l := labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)
-				obs.With(labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)),
+			for label, resolve := range hOpts.extraLabelsFromCtx {
-				time.Since(now).Seconds(),
+				l[label] = resolve(r.Context())
-				hOpts.getExemplarFn(r.Context()),
+			}
-			)
+			observeWithExemplar(obs.With(l), time.Since(now).Seconds(), hOpts.getExemplarFn(r.Context()))
 		}
 	}
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		now := time.Now()
 		next.ServeHTTP(w, r)
-
+		l := labels(code, method, r.Method, 0, hOpts.extraMethods...)
-		exemplarObserve(
+		for label, resolve := range hOpts.extraLabelsFromCtx {
-			obs.With(labels(code, method, r.Method, 0, hOpts.extraMethods...)),
+			l[label] = resolve(r.Context())
-			time.Since(now).Seconds(),
+		}
-			hOpts.getExemplarFn(r.Context()),
+		observeWithExemplar(obs.With(l), time.Since(now).Seconds(), hOpts.getExemplarFn(r.Context()))
-		)
 	}
 }
 
@@ -134,28 +138,30 @@ func InstrumentHandlerCounter(counter *prometheus.CounterVec, next http.Handler,
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(counter)
+	// Curry the counter with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(counter.MustCurryWith(hOpts.emptyDynamicLabels()))
 
 	if code {
 		return func(w http.ResponseWriter, r *http.Request) {
 			d := newDelegator(w, nil)
 			next.ServeHTTP(d, r)
 
-			exemplarAdd(
+			l := labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)
-				counter.With(labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)),
+			for label, resolve := range hOpts.extraLabelsFromCtx {
-				1,
+				l[label] = resolve(r.Context())
-				hOpts.getExemplarFn(r.Context()),
+			}
-			)
+			addWithExemplar(counter.With(l), 1, hOpts.getExemplarFn(r.Context()))
 		}
 	}
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		next.ServeHTTP(w, r)
-		exemplarAdd(
+
-			counter.With(labels(code, method, r.Method, 0, hOpts.extraMethods...)),
+		l := labels(code, method, r.Method, 0, hOpts.extraMethods...)
-			1,
+		for label, resolve := range hOpts.extraLabelsFromCtx {
-			hOpts.getExemplarFn(r.Context()),
+			l[label] = resolve(r.Context())
-		)
+		}
+		addWithExemplar(counter.With(l), 1, hOpts.getExemplarFn(r.Context()))
 	}
 }
 
@@ -187,16 +193,17 @@ func InstrumentHandlerTimeToWriteHeader(obs prometheus.ObserverVec, next http.Ha
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(hOpts.emptyDynamicLabels()))
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		now := time.Now()
 		d := newDelegator(w, func(status int) {
-			exemplarObserve(
+			l := labels(code, method, r.Method, status, hOpts.extraMethods...)
-				obs.With(labels(code, method, r.Method, status, hOpts.extraMethods...)),
+			for label, resolve := range hOpts.extraLabelsFromCtx {
-				time.Since(now).Seconds(),
+				l[label] = resolve(r.Context())
-				hOpts.getExemplarFn(r.Context()),
+			}
-			)
+			observeWithExemplar(obs.With(l), time.Since(now).Seconds(), hOpts.getExemplarFn(r.Context()))
 		})
 		next.ServeHTTP(d, r)
 	}
@@ -227,28 +234,32 @@ func InstrumentHandlerRequestSize(obs prometheus.ObserverVec, next http.Handler,
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(hOpts.emptyDynamicLabels()))
+
 	if code {
 		return func(w http.ResponseWriter, r *http.Request) {
 			d := newDelegator(w, nil)
 			next.ServeHTTP(d, r)
 			size := computeApproximateRequestSize(r)
-			exemplarObserve(
+
-				obs.With(labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)),
+			l := labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)
-				float64(size),
+			for label, resolve := range hOpts.extraLabelsFromCtx {
-				hOpts.getExemplarFn(r.Context()),
+				l[label] = resolve(r.Context())
-			)
+			}
+			observeWithExemplar(obs.With(l), float64(size), hOpts.getExemplarFn(r.Context()))
 		}
 	}
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		next.ServeHTTP(w, r)
 		size := computeApproximateRequestSize(r)
-		exemplarObserve(
+
-			obs.With(labels(code, method, r.Method, 0, hOpts.extraMethods...)),
+		l := labels(code, method, r.Method, 0, hOpts.extraMethods...)
-			float64(size),
+		for label, resolve := range hOpts.extraLabelsFromCtx {
-			hOpts.getExemplarFn(r.Context()),
+			l[label] = resolve(r.Context())
-		)
+		}
+		observeWithExemplar(obs.With(l), float64(size), hOpts.getExemplarFn(r.Context()))
 	}
 }
 
@@ -277,16 +288,18 @@ func InstrumentHandlerResponseSize(obs prometheus.ObserverVec, next http.Handler
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(hOpts.emptyDynamicLabels()))
 
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		d := newDelegator(w, nil)
 		next.ServeHTTP(d, r)
-		exemplarObserve(
+
-			obs.With(labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)),
+		l := labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)
-			float64(d.Written()),
+		for label, resolve := range hOpts.extraLabelsFromCtx {
-			hOpts.getExemplarFn(r.Context()),
+			l[label] = resolve(r.Context())
-		)
+		}
+		observeWithExemplar(obs.With(l), float64(d.Written()), hOpts.getExemplarFn(r.Context()))
 	})
 }
 
@@ -376,16 +389,13 @@ func isLabelCurried(c prometheus.Collector, label string) bool {
 	return true
 }
 
-// emptyLabels is a one-time allocation for non-partitioned metrics to avoid
-// unnecessary allocations on each request.
-var emptyLabels = prometheus.Labels{}
-
 func labels(code, method bool, reqMethod string, status int, extraMethods ...string) prometheus.Labels {
-	if !(code || method) {
-		return emptyLabels
-	}
 	labels := prometheus.Labels{}
 
+	if !(code || method) {
+		return labels
+	}
+
 	if code {
 		labels["code"] = sanitizeCode(status)
 	}

vendor/github.com/prometheus/client_golang/prometheus/promhttp/option.go

@@ -24,14 +24,32 @@ type Option interface {
 	apply(*options)
 }
 
+// LabelValueFromCtx are used to compute the label value from request context.
+// Context can be filled with values from request through middleware.
+type LabelValueFromCtx func(ctx context.Context) string
+
 // options store options for both a handler or round tripper.
 type options struct {
-	extraMethods  []string
+	extraMethods       []string
-	getExemplarFn func(requestCtx context.Context) prometheus.Labels
+	getExemplarFn      func(requestCtx context.Context) prometheus.Labels
+	extraLabelsFromCtx map[string]LabelValueFromCtx
 }
 
 func defaultOptions() *options {
-	return &options{getExemplarFn: func(ctx context.Context) prometheus.Labels { return nil }}
+	return &options{
+		getExemplarFn:      func(ctx context.Context) prometheus.Labels { return nil },
+		extraLabelsFromCtx: map[string]LabelValueFromCtx{},
+	}
+}
+
+func (o *options) emptyDynamicLabels() prometheus.Labels {
+	labels := prometheus.Labels{}
+
+	for label := range o.extraLabelsFromCtx {
+		labels[label] = ""
+	}
+
+	return labels
 }
 
 type optionApplyFunc func(*options)
@@ -48,11 +66,19 @@ func WithExtraMethods(methods ...string) Option {
 	})
 }
 
-// WithExemplarFromContext adds allows to put a hook to all counter and histogram metrics.
+// WithExemplarFromContext allows to inject function that will get exemplar from context that will be put to counter and histogram metrics.
-// If the hook function returns non-nil labels, exemplars will be added for that request, otherwise metric
+// If the function returns nil labels or the metric does not support exemplars, no exemplar will be added (noop), but
-// will get instrumented without exemplar.
+// metric will continue to observe/increment.
 func WithExemplarFromContext(getExemplarFn func(requestCtx context.Context) prometheus.Labels) Option {
 	return optionApplyFunc(func(o *options) {
 		o.getExemplarFn = getExemplarFn
 	})
 }
+
+// WithLabelFromCtx registers a label for dynamic resolution with access to context.
+// See the example for ExampleInstrumentHandlerWithLabelResolver for example usage
+func WithLabelFromCtx(name string, valueFn LabelValueFromCtx) Option {
+	return optionApplyFunc(func(o *options) {
+		o.extraLabelsFromCtx[name] = valueFn
+	})
+}

vendor/github.com/prometheus/client_golang/prometheus/registry.go

@@ -21,18 +21,17 @@ import (
 	"path/filepath"
 	"runtime"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 	"unicode/utf8"
 
-	"github.com/cespare/xxhash/v2"
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	"github.com/prometheus/common/expfmt"
-
-	dto "github.com/prometheus/client_model/go"
-
 	"github.com/prometheus/client_golang/prometheus/internal"
+
+	"github.com/cespare/xxhash/v2"
+	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/common/expfmt"
+	"google.golang.org/protobuf/proto"
 )
 
 const (
@@ -252,9 +251,12 @@ func (errs MultiError) MaybeUnwrap() error {
 }
 
 // Registry registers Prometheus collectors, collects their metrics, and gathers
-// them into MetricFamilies for exposition. It implements both Registerer and
+// them into MetricFamilies for exposition. It implements Registerer, Gatherer,
-// Gatherer. The zero value is not usable. Create instances with NewRegistry or
+// and Collector. The zero value is not usable. Create instances with
-// NewPedanticRegistry.
+// NewRegistry or NewPedanticRegistry.
+//
+// Registry implements Collector to allow it to be used for creating groups of
+// metrics. See the Grouping example for how this can be done.
 type Registry struct {
 	mtx                   sync.RWMutex
 	collectorsByID        map[uint64]Collector // ID is a hash of the descIDs.
@@ -546,7 +548,7 @@ func (r *Registry) Gather() ([]*dto.MetricFamily, error) {
 			goroutineBudget--
 			runtime.Gosched()
 		}
-		// Once both checkedMetricChan and uncheckdMetricChan are closed
+		// Once both checkedMetricChan and uncheckedMetricChan are closed
 		// and drained, the contraption above will nil out cmc and umc,
 		// and then we can leave the collect loop here.
 		if cmc == nil && umc == nil {
@@ -556,6 +558,31 @@ func (r *Registry) Gather() ([]*dto.MetricFamily, error) {
 	return internal.NormalizeMetricFamilies(metricFamiliesByName), errs.MaybeUnwrap()
 }
 
+// Describe implements Collector.
+func (r *Registry) Describe(ch chan<- *Desc) {
+	r.mtx.RLock()
+	defer r.mtx.RUnlock()
+
+	// Only report the checked Collectors; unchecked collectors don't report any
+	// Desc.
+	for _, c := range r.collectorsByID {
+		c.Describe(ch)
+	}
+}
+
+// Collect implements Collector.
+func (r *Registry) Collect(ch chan<- Metric) {
+	r.mtx.RLock()
+	defer r.mtx.RUnlock()
+
+	for _, c := range r.collectorsByID {
+		c.Collect(ch)
+	}
+	for _, c := range r.uncheckedCollectors {
+		c.Collect(ch)
+	}
+}
+
 // WriteToTextfile calls Gather on the provided Gatherer, encodes the result in the
 // Prometheus text format, and writes it to a temporary file. Upon success, the
 // temporary file is renamed to the provided filename.
@@ -905,6 +932,10 @@ func checkMetricConsistency(
 		h.WriteString(lp.GetValue())
 		h.Write(separatorByteSlice)
 	}
+	if dtoMetric.TimestampMs != nil {
+		h.WriteString(strconv.FormatInt(*(dtoMetric.TimestampMs), 10))
+		h.Write(separatorByteSlice)
+	}
 	hSum := h.Sum64()
 	if _, exists := metricHashes[hSum]; exists {
 		return fmt.Errorf(
@@ -932,7 +963,7 @@ func checkDescConsistency(
 	// Is the desc consistent with the content of the metric?
 	lpsFromDesc := make([]*dto.LabelPair, len(desc.constLabelPairs), len(dtoMetric.Label))
 	copy(lpsFromDesc, desc.constLabelPairs)
-	for _, l := range desc.variableLabels {
+	for _, l := range desc.variableLabels.names {
 		lpsFromDesc = append(lpsFromDesc, &dto.LabelPair{
 			Name: proto.String(l),
 		})

vendor/github.com/prometheus/client_golang/prometheus/summary.go

@@ -22,11 +22,11 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/beorn7/perks/quantile"
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-
 	dto "github.com/prometheus/client_model/go"
+
+	"github.com/beorn7/perks/quantile"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 // quantileLabel is used for the label that defines the quantile in a
@@ -146,6 +146,21 @@ type SummaryOpts struct {
 	// is the internal buffer size of the underlying package
 	// "github.com/bmizerany/perks/quantile").
 	BufCap uint32
+
+	// now is for testing purposes, by default it's time.Now.
+	now func() time.Time
+}
+
+// SummaryVecOpts bundles the options to create a SummaryVec metric.
+// It is mandatory to set SummaryOpts, see there for mandatory fields. VariableLabels
+// is optional and can safely be left to its default value.
+type SummaryVecOpts struct {
+	SummaryOpts
+
+	// VariableLabels are used to partition the metric vector by the given set
+	// of labels. Each label value will be constrained with the optional Constraint
+	// function, if provided.
+	VariableLabels ConstrainableLabels
 }
 
 // Problem with the sliding-window decay algorithm... The Merge method of
@@ -177,11 +192,11 @@ func NewSummary(opts SummaryOpts) Summary {
 }
 
 func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary {
-	if len(desc.variableLabels) != len(labelValues) {
+	if len(desc.variableLabels.names) != len(labelValues) {
-		panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues))
+		panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels.names, labelValues))
 	}
 
-	for _, n := range desc.variableLabels {
+	for _, n := range desc.variableLabels.names {
 		if n == quantileLabel {
 			panic(errQuantileLabelNotAllowed)
 		}
@@ -211,6 +226,9 @@ func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary {
 		opts.BufCap = DefBufCap
 	}
 
+	if opts.now == nil {
+		opts.now = time.Now
+	}
 	if len(opts.Objectives) == 0 {
 		// Use the lock-free implementation of a Summary without objectives.
 		s := &noObjectivesSummary{
@@ -219,6 +237,7 @@ func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary {
 			counts:     [2]*summaryCounts{{}, {}},
 		}
 		s.init(s) // Init self-collection.
+		s.createdTs = timestamppb.New(opts.now())
 		return s
 	}
 
@@ -234,7 +253,7 @@ func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary {
 		coldBuf:        make([]float64, 0, opts.BufCap),
 		streamDuration: opts.MaxAge / time.Duration(opts.AgeBuckets),
 	}
-	s.headStreamExpTime = time.Now().Add(s.streamDuration)
+	s.headStreamExpTime = opts.now().Add(s.streamDuration)
 	s.hotBufExpTime = s.headStreamExpTime
 
 	for i := uint32(0); i < opts.AgeBuckets; i++ {
@@ -248,6 +267,7 @@ func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary {
 	sort.Float64s(s.sortedObjectives)
 
 	s.init(s) // Init self-collection.
+	s.createdTs = timestamppb.New(opts.now())
 	return s
 }
 
@@ -275,6 +295,8 @@ type summary struct {
 	headStream                       *quantile.Stream
 	headStreamIdx                    int
 	headStreamExpTime, hotBufExpTime time.Time
+
+	createdTs *timestamppb.Timestamp
 }
 
 func (s *summary) Desc() *Desc {
@@ -296,7 +318,9 @@ func (s *summary) Observe(v float64) {
 }
 
 func (s *summary) Write(out *dto.Metric) error {
-	sum := &dto.Summary{}
+	sum := &dto.Summary{
+		CreatedTimestamp: s.createdTs,
+	}
 	qs := make([]*dto.Quantile, 0, len(s.objectives))
 
 	s.bufMtx.Lock()
@@ -429,6 +453,8 @@ type noObjectivesSummary struct {
 	counts [2]*summaryCounts
 
 	labelPairs []*dto.LabelPair
+
+	createdTs *timestamppb.Timestamp
 }
 
 func (s *noObjectivesSummary) Desc() *Desc {
@@ -479,8 +505,9 @@ func (s *noObjectivesSummary) Write(out *dto.Metric) error {
 	}
 
 	sum := &dto.Summary{
-		SampleCount: proto.Uint64(count),
+		SampleCount:      proto.Uint64(count),
-		SampleSum:   proto.Float64(math.Float64frombits(atomic.LoadUint64(&coldCounts.sumBits))),
+		SampleSum:        proto.Float64(math.Float64frombits(atomic.LoadUint64(&coldCounts.sumBits))),
+		CreatedTimestamp: s.createdTs,
 	}
 
 	out.Summary = sum
@@ -530,20 +557,28 @@ type SummaryVec struct {
 // it is handled by the Prometheus server internally, “quantile” is an illegal
 // label name. NewSummaryVec will panic if this label name is used.
 func NewSummaryVec(opts SummaryOpts, labelNames []string) *SummaryVec {
-	for _, ln := range labelNames {
+	return V2.NewSummaryVec(SummaryVecOpts{
+		SummaryOpts:    opts,
+		VariableLabels: UnconstrainedLabels(labelNames),
+	})
+}
+
+// NewSummaryVec creates a new SummaryVec based on the provided SummaryVecOpts.
+func (v2) NewSummaryVec(opts SummaryVecOpts) *SummaryVec {
+	for _, ln := range opts.VariableLabels.labelNames() {
 		if ln == quantileLabel {
 			panic(errQuantileLabelNotAllowed)
 		}
 	}
-	desc := NewDesc(
+	desc := V2.NewDesc(
 		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
 		opts.Help,
-		labelNames,
+		opts.VariableLabels,
 		opts.ConstLabels,
 	)
 	return &SummaryVec{
 		MetricVec: NewMetricVec(desc, func(lvs ...string) Metric {
-			return newSummary(desc, opts, lvs...)
+			return newSummary(desc, opts.SummaryOpts, lvs...)
 		}),
 	}
 }
@@ -603,7 +638,8 @@ func (v *SummaryVec) GetMetricWith(labels Labels) (Observer, error) {
 // WithLabelValues works as GetMetricWithLabelValues, but panics where
 // GetMetricWithLabelValues would have returned an error. Not returning an
 // error allows shortcuts like
-//     myVec.WithLabelValues("404", "GET").Observe(42.21)
+//
+//	myVec.WithLabelValues("404", "GET").Observe(42.21)
 func (v *SummaryVec) WithLabelValues(lvs ...string) Observer {
 	s, err := v.GetMetricWithLabelValues(lvs...)
 	if err != nil {
@@ -614,7 +650,8 @@ func (v *SummaryVec) WithLabelValues(lvs ...string) Observer {
 
 // With works as GetMetricWith, but panics where GetMetricWithLabels would have
 // returned an error. Not returning an error allows shortcuts like
-//     myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Observe(42.21)
+//
+//	myVec.With(prometheus.Labels{"code": "404", "method": "GET"}).Observe(42.21)
 func (v *SummaryVec) With(labels Labels) Observer {
 	s, err := v.GetMetricWith(labels)
 	if err != nil {
@@ -660,6 +697,7 @@ type constSummary struct {
 	sum        float64
 	quantiles  map[float64]float64
 	labelPairs []*dto.LabelPair
+	createdTs  *timestamppb.Timestamp
 }
 
 func (s *constSummary) Desc() *Desc {
@@ -667,7 +705,9 @@ func (s *constSummary) Desc() *Desc {
 }
 
 func (s *constSummary) Write(out *dto.Metric) error {
-	sum := &dto.Summary{}
+	sum := &dto.Summary{
+		CreatedTimestamp: s.createdTs,
+	}
 	qs := make([]*dto.Quantile, 0, len(s.quantiles))
 
 	sum.SampleCount = proto.Uint64(s.count)
@@ -701,7 +741,8 @@ func (s *constSummary) Write(out *dto.Metric) error {
 //
 // quantiles maps ranks to quantile values. For example, a median latency of
 // 0.23s and a 99th percentile latency of 0.56s would be expressed as:
-//     map[float64]float64{0.5: 0.23, 0.99: 0.56}
+//
+//	map[float64]float64{0.5: 0.23, 0.99: 0.56}
 //
 // NewConstSummary returns an error if the length of labelValues is not
 // consistent with the variable labels in Desc or if Desc is invalid.
@@ -715,7 +756,7 @@ func NewConstSummary(
 	if desc.err != nil {
 		return nil, desc.err
 	}
-	if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil {
+	if err := validateLabelValues(labelValues, len(desc.variableLabels.names)); err != nil {
 		return nil, err
 	}
 	return &constSummary{

vendor/github.com/prometheus/client_golang/prometheus/timer.go

@@ -23,13 +23,24 @@ type Timer struct {
 }
 
 // NewTimer creates a new Timer. The provided Observer is used to observe a
-// duration in seconds. Timer is usually used to time a function call in the
+// duration in seconds. If the Observer implements ExemplarObserver, passing exemplar
+// later on will be also supported.
+// Timer is usually used to time a function call in the
 // following way:
-//    func TimeMe() {
+//
-//        timer := NewTimer(myHistogram)
+//	func TimeMe() {
-//        defer timer.ObserveDuration()
+//	    timer := NewTimer(myHistogram)
-//        // Do actual work.
+//	    defer timer.ObserveDuration()
-//    }
+//	    // Do actual work.
+//	}
+//
+// or
+//
+//	func TimeMeWithExemplar() {
+//		    timer := NewTimer(myHistogram)
+//		    defer timer.ObserveDurationWithExemplar(exemplar)
+//		    // Do actual work.
+//		}
 func NewTimer(o Observer) *Timer {
 	return &Timer{
 		begin:    time.Now(),
@@ -52,3 +63,19 @@ func (t *Timer) ObserveDuration() time.Duration {
 	}
 	return d
 }
+
+// ObserveDurationWithExemplar is like ObserveDuration, but it will also
+// observe exemplar with the duration unless exemplar is nil or provided Observer can't
+// be casted to ExemplarObserver.
+func (t *Timer) ObserveDurationWithExemplar(exemplar Labels) time.Duration {
+	d := time.Since(t.begin)
+	eo, ok := t.observer.(ExemplarObserver)
+	if ok && exemplar != nil {
+		eo.ObserveWithExemplar(d.Seconds(), exemplar)
+		return d
+	}
+	if t.observer != nil {
+		t.observer.Observe(d.Seconds())
+	}
+	return d
+}

vendor/github.com/prometheus/client_golang/prometheus/value.go

@@ -14,18 +14,17 @@
 package prometheus
 
 import (
+	"errors"
 	"fmt"
 	"sort"
 	"time"
 	"unicode/utf8"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	"google.golang.org/protobuf/types/known/timestamppb"
-
 	"github.com/prometheus/client_golang/prometheus/internal"
 
 	dto "github.com/prometheus/client_model/go"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 // ValueType is an enumeration of metric types that represent a simple value.
@@ -93,7 +92,7 @@ func (v *valueFunc) Desc() *Desc {
 }
 
 func (v *valueFunc) Write(out *dto.Metric) error {
-	return populateMetric(v.valType, v.function(), v.labelPairs, nil, out)
+	return populateMetric(v.valType, v.function(), v.labelPairs, nil, out, nil)
 }
 
 // NewConstMetric returns a metric with one fixed value that cannot be
@@ -107,12 +106,12 @@ func NewConstMetric(desc *Desc, valueType ValueType, value float64, labelValues
 	if desc.err != nil {
 		return nil, desc.err
 	}
-	if err := validateLabelValues(labelValues, len(desc.variableLabels)); err != nil {
+	if err := validateLabelValues(labelValues, len(desc.variableLabels.names)); err != nil {
 		return nil, err
 	}
 
 	metric := &dto.Metric{}
-	if err := populateMetric(valueType, value, MakeLabelPairs(desc, labelValues), nil, metric); err != nil {
+	if err := populateMetric(valueType, value, MakeLabelPairs(desc, labelValues), nil, metric, nil); err != nil {
 		return nil, err
 	}
 
@@ -132,6 +131,43 @@ func MustNewConstMetric(desc *Desc, valueType ValueType, value float64, labelVal
 	return m
 }
 
+// NewConstMetricWithCreatedTimestamp does the same thing as NewConstMetric, but generates Counters
+// with created timestamp set and returns an error for other metric types.
+func NewConstMetricWithCreatedTimestamp(desc *Desc, valueType ValueType, value float64, ct time.Time, labelValues ...string) (Metric, error) {
+	if desc.err != nil {
+		return nil, desc.err
+	}
+	if err := validateLabelValues(labelValues, len(desc.variableLabels.names)); err != nil {
+		return nil, err
+	}
+	switch valueType {
+	case CounterValue:
+		break
+	default:
+		return nil, errors.New("created timestamps are only supported for counters")
+	}
+
+	metric := &dto.Metric{}
+	if err := populateMetric(valueType, value, MakeLabelPairs(desc, labelValues), nil, metric, timestamppb.New(ct)); err != nil {
+		return nil, err
+	}
+
+	return &constMetric{
+		desc:   desc,
+		metric: metric,
+	}, nil
+}
+
+// MustNewConstMetricWithCreatedTimestamp is a version of NewConstMetricWithCreatedTimestamp that panics where
+// NewConstMetricWithCreatedTimestamp would have returned an error.
+func MustNewConstMetricWithCreatedTimestamp(desc *Desc, valueType ValueType, value float64, ct time.Time, labelValues ...string) Metric {
+	m, err := NewConstMetricWithCreatedTimestamp(desc, valueType, value, ct, labelValues...)
+	if err != nil {
+		panic(err)
+	}
+	return m
+}
+
 type constMetric struct {
 	desc   *Desc
 	metric *dto.Metric
@@ -155,11 +191,12 @@ func populateMetric(
 	labelPairs []*dto.LabelPair,
 	e *dto.Exemplar,
 	m *dto.Metric,
+	ct *timestamppb.Timestamp,
 ) error {
 	m.Label = labelPairs
 	switch t {
 	case CounterValue:
-		m.Counter = &dto.Counter{Value: proto.Float64(v), Exemplar: e}
+		m.Counter = &dto.Counter{Value: proto.Float64(v), Exemplar: e, CreatedTimestamp: ct}
 	case GaugeValue:
 		m.Gauge = &dto.Gauge{Value: proto.Float64(v)}
 	case UntypedValue:
@@ -178,19 +215,19 @@ func populateMetric(
 // This function is only needed for custom Metric implementations. See MetricVec
 // example.
 func MakeLabelPairs(desc *Desc, labelValues []string) []*dto.LabelPair {
-	totalLen := len(desc.variableLabels) + len(desc.constLabelPairs)
+	totalLen := len(desc.variableLabels.names) + len(desc.constLabelPairs)
 	if totalLen == 0 {
 		// Super fast path.
 		return nil
 	}
-	if len(desc.variableLabels) == 0 {
+	if len(desc.variableLabels.names) == 0 {
 		// Moderately fast path.
 		return desc.constLabelPairs
 	}
 	labelPairs := make([]*dto.LabelPair, 0, totalLen)
-	for i, n := range desc.variableLabels {
+	for i, l := range desc.variableLabels.names {
 		labelPairs = append(labelPairs, &dto.LabelPair{
-			Name:  proto.String(n),
+			Name:  proto.String(l),
 			Value: proto.String(labelValues[i]),
 		})
 	}

vendor/github.com/prometheus/client_golang/prometheus/vec.go

@@ -72,6 +72,8 @@ func NewMetricVec(desc *Desc, newMetric func(lvs ...string) Metric) *MetricVec {
 // with a performance overhead (for creating and processing the Labels map).
 // See also the CounterVec example.
 func (m *MetricVec) DeleteLabelValues(lvs ...string) bool {
+	lvs = constrainLabelValues(m.desc, lvs, m.curry)
+
 	h, err := m.hashLabelValues(lvs)
 	if err != nil {
 		return false
@@ -91,6 +93,9 @@ func (m *MetricVec) DeleteLabelValues(lvs ...string) bool {
 // This method is used for the same purpose as DeleteLabelValues(...string). See
 // there for pros and cons of the two methods.
 func (m *MetricVec) Delete(labels Labels) bool {
+	labels, closer := constrainLabels(m.desc, labels)
+	defer closer()
+
 	h, err := m.hashLabels(labels)
 	if err != nil {
 		return false
@@ -106,6 +111,9 @@ func (m *MetricVec) Delete(labels Labels) bool {
 // Note that curried labels will never be matched if deleting from the curried vector.
 // To match curried labels with DeletePartialMatch, it must be called on the base vector.
 func (m *MetricVec) DeletePartialMatch(labels Labels) int {
+	labels, closer := constrainLabels(m.desc, labels)
+	defer closer()
+
 	return m.metricMap.deleteByLabels(labels, m.curry)
 }
 
@@ -144,11 +152,11 @@ func (m *MetricVec) CurryWith(labels Labels) (*MetricVec, error) {
 		oldCurry = m.curry
 		iCurry   int
 	)
-	for i, label := range m.desc.variableLabels {
+	for i, labelName := range m.desc.variableLabels.names {
-		val, ok := labels[label]
+		val, ok := labels[labelName]
 		if iCurry < len(oldCurry) && oldCurry[iCurry].index == i {
 			if ok {
-				return nil, fmt.Errorf("label name %q is already curried", label)
+				return nil, fmt.Errorf("label name %q is already curried", labelName)
 			}
 			newCurry = append(newCurry, oldCurry[iCurry])
 			iCurry++
@@ -156,7 +164,10 @@ func (m *MetricVec) CurryWith(labels Labels) (*MetricVec, error) {
 			if !ok {
 				continue // Label stays uncurried.
 			}
-			newCurry = append(newCurry, curriedLabelValue{i, val})
+			newCurry = append(newCurry, curriedLabelValue{
+				i,
+				m.desc.variableLabels.constrain(labelName, val),
+			})
 		}
 	}
 	if l := len(oldCurry) + len(labels) - len(newCurry); l > 0 {
@@ -199,6 +210,7 @@ func (m *MetricVec) CurryWith(labels Labels) (*MetricVec, error) {
 // a wrapper around MetricVec, implementing a vector for a specific Metric
 // implementation, for example GaugeVec.
 func (m *MetricVec) GetMetricWithLabelValues(lvs ...string) (Metric, error) {
+	lvs = constrainLabelValues(m.desc, lvs, m.curry)
 	h, err := m.hashLabelValues(lvs)
 	if err != nil {
 		return nil, err
@@ -224,6 +236,9 @@ func (m *MetricVec) GetMetricWithLabelValues(lvs ...string) (Metric, error) {
 // around MetricVec, implementing a vector for a specific Metric implementation,
 // for example GaugeVec.
 func (m *MetricVec) GetMetricWith(labels Labels) (Metric, error) {
+	labels, closer := constrainLabels(m.desc, labels)
+	defer closer()
+
 	h, err := m.hashLabels(labels)
 	if err != nil {
 		return nil, err
@@ -233,7 +248,7 @@ func (m *MetricVec) GetMetricWith(labels Labels) (Metric, error) {
 }
 
 func (m *MetricVec) hashLabelValues(vals []string) (uint64, error) {
-	if err := validateLabelValues(vals, len(m.desc.variableLabels)-len(m.curry)); err != nil {
+	if err := validateLabelValues(vals, len(m.desc.variableLabels.names)-len(m.curry)); err != nil {
 		return 0, err
 	}
 
@@ -242,7 +257,7 @@ func (m *MetricVec) hashLabelValues(vals []string) (uint64, error) {
 		curry         = m.curry
 		iVals, iCurry int
 	)
-	for i := 0; i < len(m.desc.variableLabels); i++ {
+	for i := 0; i < len(m.desc.variableLabels.names); i++ {
 		if iCurry < len(curry) && curry[iCurry].index == i {
 			h = m.hashAdd(h, curry[iCurry].value)
 			iCurry++
@@ -256,7 +271,7 @@ func (m *MetricVec) hashLabelValues(vals []string) (uint64, error) {
 }
 
 func (m *MetricVec) hashLabels(labels Labels) (uint64, error) {
-	if err := validateValuesInLabels(labels, len(m.desc.variableLabels)-len(m.curry)); err != nil {
+	if err := validateValuesInLabels(labels, len(m.desc.variableLabels.names)-len(m.curry)); err != nil {
 		return 0, err
 	}
 
@@ -265,17 +280,17 @@ func (m *MetricVec) hashLabels(labels Labels) (uint64, error) {
 		curry  = m.curry
 		iCurry int
 	)
-	for i, label := range m.desc.variableLabels {
+	for i, labelName := range m.desc.variableLabels.names {
-		val, ok := labels[label]
+		val, ok := labels[labelName]
 		if iCurry < len(curry) && curry[iCurry].index == i {
 			if ok {
-				return 0, fmt.Errorf("label name %q is already curried", label)
+				return 0, fmt.Errorf("label name %q is already curried", labelName)
 			}
 			h = m.hashAdd(h, curry[iCurry].value)
 			iCurry++
 		} else {
 			if !ok {
-				return 0, fmt.Errorf("label name %q missing in label map", label)
+				return 0, fmt.Errorf("label name %q missing in label map", labelName)
 			}
 			h = m.hashAdd(h, val)
 		}
@@ -453,7 +468,7 @@ func valueMatchesVariableOrCurriedValue(targetValue string, index int, values []
 func matchPartialLabels(desc *Desc, values []string, labels Labels, curry []curriedLabelValue) bool {
 	for l, v := range labels {
 		// Check if the target label exists in our metrics and get the index.
-		varLabelIndex, validLabel := indexOf(l, desc.variableLabels)
+		varLabelIndex, validLabel := indexOf(l, desc.variableLabels.names)
 		if validLabel {
 			// Check the value of that label against the target value.
 			// We don't consider curried values in partial matches.
@@ -597,7 +612,7 @@ func matchLabels(desc *Desc, values []string, labels Labels, curry []curriedLabe
 		return false
 	}
 	iCurry := 0
-	for i, k := range desc.variableLabels {
+	for i, k := range desc.variableLabels.names {
 		if iCurry < len(curry) && curry[iCurry].index == i {
 			if values[i] != curry[iCurry].value {
 				return false
@@ -615,7 +630,7 @@ func matchLabels(desc *Desc, values []string, labels Labels, curry []curriedLabe
 func extractLabelValues(desc *Desc, labels Labels, curry []curriedLabelValue) []string {
 	labelValues := make([]string, len(labels)+len(curry))
 	iCurry := 0
-	for i, k := range desc.variableLabels {
+	for i, k := range desc.variableLabels.names {
 		if iCurry < len(curry) && curry[iCurry].index == i {
 			labelValues[i] = curry[iCurry].value
 			iCurry++
@@ -640,3 +655,55 @@ func inlineLabelValues(lvs []string, curry []curriedLabelValue) []string {
 	}
 	return labelValues
 }
+
+var labelsPool = &sync.Pool{
+	New: func() interface{} {
+		return make(Labels)
+	},
+}
+
+func constrainLabels(desc *Desc, labels Labels) (Labels, func()) {
+	if len(desc.variableLabels.labelConstraints) == 0 {
+		// Fast path when there's no constraints
+		return labels, func() {}
+	}
+
+	constrainedLabels := labelsPool.Get().(Labels)
+	for l, v := range labels {
+		constrainedLabels[l] = desc.variableLabels.constrain(l, v)
+	}
+
+	return constrainedLabels, func() {
+		for k := range constrainedLabels {
+			delete(constrainedLabels, k)
+		}
+		labelsPool.Put(constrainedLabels)
+	}
+}
+
+func constrainLabelValues(desc *Desc, lvs []string, curry []curriedLabelValue) []string {
+	if len(desc.variableLabels.labelConstraints) == 0 {
+		// Fast path when there's no constraints
+		return lvs
+	}
+
+	constrainedValues := make([]string, len(lvs))
+	var iCurry, iLVs int
+	for i := 0; i < len(lvs)+len(curry); i++ {
+		if iCurry < len(curry) && curry[iCurry].index == i {
+			iCurry++
+			continue
+		}
+
+		if i < len(desc.variableLabels.names) {
+			constrainedValues[iLVs] = desc.variableLabels.constrain(
+				desc.variableLabels.names[i],
+				lvs[iLVs],
+			)
+		} else {
+			constrainedValues[iLVs] = lvs[iLVs]
+		}
+		iLVs++
+	}
+	return constrainedValues
+}

vendor/github.com/prometheus/client_golang/prometheus/vnext.go

@@ -0,0 +1,23 @@
+// Copyright 2022 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+type v2 struct{}
+
+// V2 is a struct that can be referenced to access experimental API that might
+// be present in v2 of client golang someday. It offers extended functionality
+// of v1 with slightly changed API. It is acceptable to use some pieces from v1
+// and e.g `prometheus.NewGauge` and some from v2 e.g. `prometheus.V2.NewDesc`
+// in the same codebase.
+var V2 = v2{}

vendor/github.com/prometheus/client_golang/prometheus/wrap.go

@@ -17,12 +17,10 @@ import (
 	"fmt"
 	"sort"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
+	"github.com/prometheus/client_golang/prometheus/internal"
-	"github.com/golang/protobuf/proto"
 
 	dto "github.com/prometheus/client_model/go"
-
+	"google.golang.org/protobuf/proto"
-	"github.com/prometheus/client_golang/prometheus/internal"
 )
 
 // WrapRegistererWith returns a Registerer wrapping the provided
@@ -206,7 +204,7 @@ func wrapDesc(desc *Desc, prefix string, labels Labels) *Desc {
 		constLabels[ln] = lv
 	}
 	// NewDesc will do remaining validations.
-	newDesc := NewDesc(prefix+desc.fqName, desc.help, desc.variableLabels, constLabels)
+	newDesc := V2.NewDesc(prefix+desc.fqName, desc.help, desc.variableLabels, constLabels)
 	// Propagate errors if there was any. This will override any errer
 	// created by NewDesc above, i.e. earlier errors get precedence.
 	if desc.err != nil {

vendor/github.com/prometheus/common/expfmt/decode.go

@@ -14,6 +14,7 @@
 package expfmt
 
 import (
+	"bufio"
 	"fmt"
 	"io"
 	"math"
@@ -21,8 +22,8 @@ import (
 	"net/http"
 
 	dto "github.com/prometheus/client_model/go"
+	"google.golang.org/protobuf/encoding/protodelim"
 
-	"github.com/matttproud/golang_protobuf_extensions/pbutil"
 	"github.com/prometheus/common/model"
 )
 
@@ -44,7 +45,7 @@ func ResponseFormat(h http.Header) Format {
 
 	mediatype, params, err := mime.ParseMediaType(ct)
 	if err != nil {
-		return FmtUnknown
+		return fmtUnknown
 	}
 
 	const textType = "text/plain"
@@ -52,28 +53,28 @@ func ResponseFormat(h http.Header) Format {
 	switch mediatype {
 	case ProtoType:
 		if p, ok := params["proto"]; ok && p != ProtoProtocol {
-			return FmtUnknown
+			return fmtUnknown
 		}
 		if e, ok := params["encoding"]; ok && e != "delimited" {
-			return FmtUnknown
+			return fmtUnknown
 		}
-		return FmtProtoDelim
+		return fmtProtoDelim
 
 	case textType:
 		if v, ok := params["version"]; ok && v != TextVersion {
-			return FmtUnknown
+			return fmtUnknown
 		}
-		return FmtText
+		return fmtText
 	}
 
-	return FmtUnknown
+	return fmtUnknown
 }
 
 // NewDecoder returns a new decoder based on the given input format.
 // If the input format does not imply otherwise, a text format decoder is returned.
 func NewDecoder(r io.Reader, format Format) Decoder {
-	switch format {
+	switch format.FormatType() {
-	case FmtProtoDelim:
+	case TypeProtoDelim:
 		return &protoDecoder{r: r}
 	}
 	return &textDecoder{r: r}
@@ -86,8 +87,10 @@ type protoDecoder struct {
 
 // Decode implements the Decoder interface.
 func (d *protoDecoder) Decode(v *dto.MetricFamily) error {
-	_, err := pbutil.ReadDelimited(d.r, v)
+	opts := protodelim.UnmarshalOptions{
-	if err != nil {
+		MaxSize: -1,
+	}
+	if err := opts.UnmarshalFrom(bufio.NewReader(d.r), v); err != nil {
 		return err
 	}
 	if !model.IsValidMetricName(model.LabelValue(v.GetName())) {
@@ -115,32 +118,31 @@ func (d *protoDecoder) Decode(v *dto.MetricFamily) error {
 // textDecoder implements the Decoder interface for the text protocol.
 type textDecoder struct {
 	r    io.Reader
-	p    TextParser
+	fams map[string]*dto.MetricFamily
-	fams []*dto.MetricFamily
+	err  error
 }
 
 // Decode implements the Decoder interface.
 func (d *textDecoder) Decode(v *dto.MetricFamily) error {
-	// TODO(fabxc): Wrap this as a line reader to make streaming safer.
+	if d.err == nil {
-	if len(d.fams) == 0 {
+		// Read all metrics in one shot.
-		// No cached metric families, read everything and parse metrics.
+		var p TextParser
-		fams, err := d.p.TextToMetricFamilies(d.r)
+		d.fams, d.err = p.TextToMetricFamilies(d.r)
-		if err != nil {
+		// If we don't get an error, store io.EOF for the end.
-			return err
+		if d.err == nil {
-		}
+			d.err = io.EOF
-		if len(fams) == 0 {
-			return io.EOF
-		}
-		d.fams = make([]*dto.MetricFamily, 0, len(fams))
-		for _, f := range fams {
-			d.fams = append(d.fams, f)
 		}
 	}
-
+	// Pick off one MetricFamily per Decode until there's nothing left.
-	*v = *d.fams[0]
+	for key, fam := range d.fams {
-	d.fams = d.fams[1:]
+		v.Name = fam.Name
-
+		v.Help = fam.Help
-	return nil
+		v.Type = fam.Type
+		v.Metric = fam.Metric
+		delete(d.fams, key)
+		return nil
+	}
+	return d.err
 }
 
 // SampleDecoder wraps a Decoder to extract samples from the metric families

vendor/github.com/prometheus/common/expfmt/encode.go

@@ -18,9 +18,11 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/golang/protobuf/proto" //nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
+	"google.golang.org/protobuf/encoding/protodelim"
-	"github.com/matttproud/golang_protobuf_extensions/pbutil"
+	"google.golang.org/protobuf/encoding/prototext"
+
 	"github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg"
+	"github.com/prometheus/common/model"
 
 	dto "github.com/prometheus/client_model/go"
 )
@@ -60,23 +62,32 @@ func (ec encoderCloser) Close() error {
 // as the support is still experimental. To include the option to negotiate
 // FmtOpenMetrics, use NegotiateOpenMetrics.
 func Negotiate(h http.Header) Format {
+	escapingScheme := Format(fmt.Sprintf("; escaping=%s", Format(model.NameEscapingScheme.String())))
 	for _, ac := range goautoneg.ParseAccept(h.Get(hdrAccept)) {
+		if escapeParam := ac.Params[model.EscapingKey]; escapeParam != "" {
+			switch Format(escapeParam) {
+			case model.AllowUTF8, model.EscapeUnderscores, model.EscapeDots, model.EscapeValues:
+				escapingScheme = Format(fmt.Sprintf("; escaping=%s", escapeParam))
+			default:
+				// If the escaping parameter is unknown, ignore it.
+			}
+		}
 		ver := ac.Params["version"]
 		if ac.Type+"/"+ac.SubType == ProtoType && ac.Params["proto"] == ProtoProtocol {
 			switch ac.Params["encoding"] {
 			case "delimited":
-				return FmtProtoDelim
+				return fmtProtoDelim + escapingScheme
 			case "text":
-				return FmtProtoText
+				return fmtProtoText + escapingScheme
 			case "compact-text":
-				return FmtProtoCompact
+				return fmtProtoCompact + escapingScheme
 			}
 		}
 		if ac.Type == "text" && ac.SubType == "plain" && (ver == TextVersion || ver == "") {
-			return FmtText
+			return fmtText + escapingScheme
 		}
 	}
-	return FmtText
+	return fmtText + escapingScheme
 }
 
 // NegotiateIncludingOpenMetrics works like Negotiate but includes
@@ -84,26 +95,40 @@ func Negotiate(h http.Header) Format {
 // temporary and will disappear once FmtOpenMetrics is fully supported and as
 // such may be negotiated by the normal Negotiate function.
 func NegotiateIncludingOpenMetrics(h http.Header) Format {
+	escapingScheme := Format(fmt.Sprintf("; escaping=%s", Format(model.NameEscapingScheme.String())))
 	for _, ac := range goautoneg.ParseAccept(h.Get(hdrAccept)) {
+		if escapeParam := ac.Params[model.EscapingKey]; escapeParam != "" {
+			switch Format(escapeParam) {
+			case model.AllowUTF8, model.EscapeUnderscores, model.EscapeDots, model.EscapeValues:
+				escapingScheme = Format(fmt.Sprintf("; escaping=%s", escapeParam))
+			default:
+				// If the escaping parameter is unknown, ignore it.
+			}
+		}
 		ver := ac.Params["version"]
 		if ac.Type+"/"+ac.SubType == ProtoType && ac.Params["proto"] == ProtoProtocol {
 			switch ac.Params["encoding"] {
 			case "delimited":
-				return FmtProtoDelim
+				return fmtProtoDelim + escapingScheme
 			case "text":
-				return FmtProtoText
+				return fmtProtoText + escapingScheme
 			case "compact-text":
-				return FmtProtoCompact
+				return fmtProtoCompact + escapingScheme
 			}
 		}
 		if ac.Type == "text" && ac.SubType == "plain" && (ver == TextVersion || ver == "") {
-			return FmtText
+			return fmtText + escapingScheme
 		}
-		if ac.Type+"/"+ac.SubType == OpenMetricsType && (ver == OpenMetricsVersion || ver == "") {
+		if ac.Type+"/"+ac.SubType == OpenMetricsType && (ver == OpenMetricsVersion_0_0_1 || ver == OpenMetricsVersion_1_0_0 || ver == "") {
-			return FmtOpenMetrics
+			switch ver {
+			case OpenMetricsVersion_1_0_0:
+				return fmtOpenMetrics_1_0_0 + escapingScheme
+			default:
+				return fmtOpenMetrics_0_0_1 + escapingScheme
+			}
 		}
 	}
-	return FmtText
+	return fmtText + escapingScheme
 }
 
 // NewEncoder returns a new encoder based on content type negotiation. All
@@ -112,44 +137,48 @@ func NegotiateIncludingOpenMetrics(h http.Header) Format {
 // for FmtOpenMetrics, but a future (breaking) release will add the Close method
 // to the Encoder interface directly. The current version of the Encoder
 // interface is kept for backwards compatibility.
+// In cases where the Format does not allow for UTF-8 names, the global
+// NameEscapingScheme will be applied.
 func NewEncoder(w io.Writer, format Format) Encoder {
-	switch format {
+	escapingScheme := format.ToEscapingScheme()
-	case FmtProtoDelim:
+
+	switch format.FormatType() {
+	case TypeProtoDelim:
 		return encoderCloser{
 			encode: func(v *dto.MetricFamily) error {
-				_, err := pbutil.WriteDelimited(w, v)
+				_, err := protodelim.MarshalTo(w, v)
 				return err
 			},
 			close: func() error { return nil },
 		}
-	case FmtProtoCompact:
+	case TypeProtoCompact:
 		return encoderCloser{
 			encode: func(v *dto.MetricFamily) error {
-				_, err := fmt.Fprintln(w, v.String())
+				_, err := fmt.Fprintln(w, model.EscapeMetricFamily(v, escapingScheme).String())
 				return err
 			},
 			close: func() error { return nil },
 		}
-	case FmtProtoText:
+	case TypeProtoText:
 		return encoderCloser{
 			encode: func(v *dto.MetricFamily) error {
-				_, err := fmt.Fprintln(w, proto.MarshalTextString(v))
+				_, err := fmt.Fprintln(w, prototext.Format(model.EscapeMetricFamily(v, escapingScheme)))
 				return err
 			},
 			close: func() error { return nil },
 		}
-	case FmtText:
+	case TypeTextPlain:
 		return encoderCloser{
 			encode: func(v *dto.MetricFamily) error {
-				_, err := MetricFamilyToText(w, v)
+				_, err := MetricFamilyToText(w, model.EscapeMetricFamily(v, escapingScheme))
 				return err
 			},
 			close: func() error { return nil },
 		}
-	case FmtOpenMetrics:
+	case TypeOpenMetrics:
 		return encoderCloser{
 			encode: func(v *dto.MetricFamily) error {
-				_, err := MetricFamilyToOpenMetrics(w, v)
+				_, err := MetricFamilyToOpenMetrics(w, model.EscapeMetricFamily(v, escapingScheme))
 				return err
 			},
 			close: func() error {

vendor/github.com/prometheus/common/expfmt/expfmt.go

@@ -14,28 +14,154 @@
 // Package expfmt contains tools for reading and writing Prometheus metrics.
 package expfmt
 
+import (
+	"strings"
+
+	"github.com/prometheus/common/model"
+)
+
 // Format specifies the HTTP content type of the different wire protocols.
 type Format string
 
-// Constants to assemble the Content-Type values for the different wire protocols.
+// Constants to assemble the Content-Type values for the different wire
+// protocols. The Content-Type strings here are all for the legacy exposition
+// formats, where valid characters for metric names and label names are limited.
+// Support for arbitrary UTF-8 characters in those names is already partially
+// implemented in this module (see model.ValidationScheme), but to actually use
+// it on the wire, new content-type strings will have to be agreed upon and
+// added here.
 const (
-	TextVersion        = "0.0.4"
+	TextVersion              = "0.0.4"
-	ProtoType          = `application/vnd.google.protobuf`
+	ProtoType                = `application/vnd.google.protobuf`
-	ProtoProtocol      = `io.prometheus.client.MetricFamily`
+	ProtoProtocol            = `io.prometheus.client.MetricFamily`
-	ProtoFmt           = ProtoType + "; proto=" + ProtoProtocol + ";"
+	protoFmt                 = ProtoType + "; proto=" + ProtoProtocol + ";"
-	OpenMetricsType    = `application/openmetrics-text`
+	OpenMetricsType          = `application/openmetrics-text`
-	OpenMetricsVersion = "0.0.1"
+	OpenMetricsVersion_0_0_1 = "0.0.1"
+	OpenMetricsVersion_1_0_0 = "1.0.0"
 
-	// The Content-Type values for the different wire protocols.
+	// The Content-Type values for the different wire protocols. Note that these
-	FmtUnknown      Format = `<unknown>`
+	// values are now unexported. If code was relying on comparisons to these
-	FmtText         Format = `text/plain; version=` + TextVersion + `; charset=utf-8`
+	// constants, instead use FormatType().
-	FmtProtoDelim   Format = ProtoFmt + ` encoding=delimited`
+	fmtUnknown           Format = `<unknown>`
-	FmtProtoText    Format = ProtoFmt + ` encoding=text`
+	fmtText              Format = `text/plain; version=` + TextVersion + `; charset=utf-8`
-	FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text`
+	fmtProtoDelim        Format = protoFmt + ` encoding=delimited`
-	FmtOpenMetrics  Format = OpenMetricsType + `; version=` + OpenMetricsVersion + `; charset=utf-8`
+	fmtProtoText         Format = protoFmt + ` encoding=text`
+	fmtProtoCompact      Format = protoFmt + ` encoding=compact-text`
+	fmtOpenMetrics_1_0_0 Format = OpenMetricsType + `; version=` + OpenMetricsVersion_1_0_0 + `; charset=utf-8`
+	fmtOpenMetrics_0_0_1 Format = OpenMetricsType + `; version=` + OpenMetricsVersion_0_0_1 + `; charset=utf-8`
 )
 
 const (
 	hdrContentType = "Content-Type"
 	hdrAccept      = "Accept"
 )
+
+// FormatType is a Go enum representing the overall category for the given
+// Format. As the number of Format permutations increases, doing basic string
+// comparisons are not feasible, so this enum captures the most useful
+// high-level attribute of the Format string.
+type FormatType int
+
+const (
+	TypeUnknown = iota
+	TypeProtoCompact
+	TypeProtoDelim
+	TypeProtoText
+	TypeTextPlain
+	TypeOpenMetrics
+)
+
+// NewFormat generates a new Format from the type provided. Mostly used for
+// tests, most Formats should be generated as part of content negotiation in
+// encode.go.
+func NewFormat(t FormatType) Format {
+	switch t {
+	case TypeProtoCompact:
+		return fmtProtoCompact
+	case TypeProtoDelim:
+		return fmtProtoDelim
+	case TypeProtoText:
+		return fmtProtoText
+	case TypeTextPlain:
+		return fmtText
+	case TypeOpenMetrics:
+		return fmtOpenMetrics_1_0_0
+	default:
+		return fmtUnknown
+	}
+}
+
+// FormatType deduces an overall FormatType for the given format.
+func (f Format) FormatType() FormatType {
+	toks := strings.Split(string(f), ";")
+	if len(toks) < 2 {
+		return TypeUnknown
+	}
+
+	params := make(map[string]string)
+	for i, t := range toks {
+		if i == 0 {
+			continue
+		}
+		args := strings.Split(t, "=")
+		if len(args) != 2 {
+			continue
+		}
+		params[strings.TrimSpace(args[0])] = strings.TrimSpace(args[1])
+	}
+
+	switch strings.TrimSpace(toks[0]) {
+	case ProtoType:
+		if params["proto"] != ProtoProtocol {
+			return TypeUnknown
+		}
+		switch params["encoding"] {
+		case "delimited":
+			return TypeProtoDelim
+		case "text":
+			return TypeProtoText
+		case "compact-text":
+			return TypeProtoCompact
+		default:
+			return TypeUnknown
+		}
+	case OpenMetricsType:
+		if params["charset"] != "utf-8" {
+			return TypeUnknown
+		}
+		return TypeOpenMetrics
+	case "text/plain":
+		v, ok := params["version"]
+		if !ok {
+			return TypeTextPlain
+		}
+		if v == TextVersion {
+			return TypeTextPlain
+		}
+		return TypeUnknown
+	default:
+		return TypeUnknown
+	}
+}
+
+// ToEscapingScheme returns an EscapingScheme depending on the Format. Iff the
+// Format contains a escaping=allow-utf-8 term, it will select NoEscaping. If a valid
+// "escaping" term exists, that will be used. Otherwise, the global default will
+// be returned.
+func (format Format) ToEscapingScheme() model.EscapingScheme {
+	for _, p := range strings.Split(string(format), ";") {
+		toks := strings.Split(p, "=")
+		if len(toks) != 2 {
+			continue
+		}
+		key, value := strings.TrimSpace(toks[0]), strings.TrimSpace(toks[1])
+		if key == model.EscapingKey {
+			scheme, err := model.ToEscapingScheme(value)
+			if err != nil {
+				return model.NameEscapingScheme
+			}
+			return scheme
+		}
+	}
+	return model.NameEscapingScheme
+}

vendor/github.com/prometheus/common/expfmt/fuzz.go

@@ -21,8 +21,8 @@ import "bytes"
 
 // Fuzz text metric parser with with github.com/dvyukov/go-fuzz:
 //
-//     go-fuzz-build github.com/prometheus/common/expfmt
+//	go-fuzz-build github.com/prometheus/common/expfmt
-//     go-fuzz -bin expfmt-fuzz.zip -workdir fuzz
+//	go-fuzz -bin expfmt-fuzz.zip -workdir fuzz
 //
 // Further input samples should go in the folder fuzz/corpus.
 func Fuzz(in []byte) int {

vendor/github.com/prometheus/common/expfmt/openmetrics_create.go

@@ -35,6 +35,18 @@ import (
 // sanity checks. If the input contains duplicate metrics or invalid metric or
 // label names, the conversion will result in invalid text format output.
 //
+// If metric names conform to the legacy validation pattern, they will be placed
+// outside the brackets in the traditional way, like `foo{}`. If the metric name
+// fails the legacy validation check, it will be placed quoted inside the
+// brackets: `{"foo"}`. As stated above, the input is assumed to be santized and
+// no error will be thrown in this case.
+//
+// Similar to metric names, if label names conform to the legacy validation
+// pattern, they will be unquoted as normal, like `foo{bar="baz"}`. If the label
+// name fails the legacy validation check, it will be quoted:
+// `foo{"bar"="baz"}`. As stated above, the input is assumed to be santized and
+// no error will be thrown in this case.
+//
 // This function fulfills the type 'expfmt.encoder'.
 //
 // Note that OpenMetrics requires a final `# EOF` line. Since this function acts
@@ -46,20 +58,20 @@ import (
 // missing features and peculiarities to avoid complications when switching from
 // Prometheus to OpenMetrics or vice versa:
 //
-// - Counters are expected to have the `_total` suffix in their metric name. In
+//   - Counters are expected to have the `_total` suffix in their metric name. In
-//   the output, the suffix will be truncated from the `# TYPE` and `# HELP`
+//     the output, the suffix will be truncated from the `# TYPE` and `# HELP`
-//   line. A counter with a missing `_total` suffix is not an error. However,
+//     line. A counter with a missing `_total` suffix is not an error. However,
-//   its type will be set to `unknown` in that case to avoid invalid OpenMetrics
+//     its type will be set to `unknown` in that case to avoid invalid OpenMetrics
-//   output.
+//     output.
 //
-// - No support for the following (optional) features: `# UNIT` line, `_created`
+//   - No support for the following (optional) features: `# UNIT` line, `_created`
-//   line, info type, stateset type, gaugehistogram type.
+//     line, info type, stateset type, gaugehistogram type.
 //
-// - The size of exemplar labels is not checked (i.e. it's possible to create
+//   - The size of exemplar labels is not checked (i.e. it's possible to create
-//   exemplars that are larger than allowed by the OpenMetrics specification).
+//     exemplars that are larger than allowed by the OpenMetrics specification).
 //
-// - The value of Counters is not checked. (OpenMetrics doesn't allow counters
+//   - The value of Counters is not checked. (OpenMetrics doesn't allow counters
-//   with a `NaN` value.)
+//     with a `NaN` value.)
 func MetricFamilyToOpenMetrics(out io.Writer, in *dto.MetricFamily) (written int, err error) {
 	name := in.GetName()
 	if name == "" {
@@ -98,7 +110,7 @@ func MetricFamilyToOpenMetrics(out io.Writer, in *dto.MetricFamily) (written int
 		if err != nil {
 			return
 		}
-		n, err = w.WriteString(shortName)
+		n, err = writeName(w, shortName)
 		written += n
 		if err != nil {
 			return
@@ -124,7 +136,7 @@ func MetricFamilyToOpenMetrics(out io.Writer, in *dto.MetricFamily) (written int
 	if err != nil {
 		return
 	}
-	n, err = w.WriteString(shortName)
+	n, err = writeName(w, shortName)
 	written += n
 	if err != nil {
 		return
@@ -303,21 +315,9 @@ func writeOpenMetricsSample(
 	floatValue float64, intValue uint64, useIntValue bool,
 	exemplar *dto.Exemplar,
 ) (int, error) {
-	var written int
+	written := 0
-	n, err := w.WriteString(name)
+	n, err := writeOpenMetricsNameAndLabelPairs(
-	written += n
+		w, name+suffix, metric.Label, additionalLabelName, additionalLabelValue,
-	if err != nil {
-		return written, err
-	}
-	if suffix != "" {
-		n, err = w.WriteString(suffix)
-		written += n
-		if err != nil {
-			return written, err
-		}
-	}
-	n, err = writeOpenMetricsLabelPairs(
-		w, metric.Label, additionalLabelName, additionalLabelValue,
 	)
 	written += n
 	if err != nil {
@@ -365,27 +365,58 @@ func writeOpenMetricsSample(
 	return written, nil
 }
 
-// writeOpenMetricsLabelPairs works like writeOpenMetrics but formats the float
+// writeOpenMetricsNameAndLabelPairs works like writeOpenMetricsSample but
-// in OpenMetrics style.
+// formats the float in OpenMetrics style.
-func writeOpenMetricsLabelPairs(
+func writeOpenMetricsNameAndLabelPairs(
 	w enhancedWriter,
+	name string,
 	in []*dto.LabelPair,
 	additionalLabelName string, additionalLabelValue float64,
 ) (int, error) {
-	if len(in) == 0 && additionalLabelName == "" {
-		return 0, nil
-	}
 	var (
-		written   int
+		written            int
-		separator byte = '{'
+		separator          byte = '{'
+		metricInsideBraces      = false
 	)
+
+	if name != "" {
+		// If the name does not pass the legacy validity check, we must put the
+		// metric name inside the braces, quoted.
+		if !model.IsValidLegacyMetricName(model.LabelValue(name)) {
+			metricInsideBraces = true
+			err := w.WriteByte(separator)
+			written++
+			if err != nil {
+				return written, err
+			}
+			separator = ','
+		}
+
+		n, err := writeName(w, name)
+		written += n
+		if err != nil {
+			return written, err
+		}
+	}
+
+	if len(in) == 0 && additionalLabelName == "" {
+		if metricInsideBraces {
+			err := w.WriteByte('}')
+			written++
+			if err != nil {
+				return written, err
+			}
+		}
+		return written, nil
+	}
+
 	for _, lp := range in {
 		err := w.WriteByte(separator)
 		written++
 		if err != nil {
 			return written, err
 		}
-		n, err := w.WriteString(lp.GetName())
+		n, err := writeName(w, lp.GetName())
 		written += n
 		if err != nil {
 			return written, err
@@ -451,7 +482,7 @@ func writeExemplar(w enhancedWriter, e *dto.Exemplar) (int, error) {
 	if err != nil {
 		return written, err
 	}
-	n, err = writeOpenMetricsLabelPairs(w, e.Label, "", 0)
+	n, err = writeOpenMetricsNameAndLabelPairs(w, "", e.Label, "", 0)
 	written += n
 	if err != nil {
 		return written, err

vendor/github.com/prometheus/common/expfmt/text_create.go

@@ -17,7 +17,6 @@ import (
 	"bufio"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math"
 	"strconv"
 	"strings"
@@ -44,7 +43,7 @@ const (
 var (
 	bufPool = sync.Pool{
 		New: func() interface{} {
-			return bufio.NewWriter(ioutil.Discard)
+			return bufio.NewWriter(io.Discard)
 		},
 	}
 	numBufPool = sync.Pool{
@@ -63,6 +62,18 @@ var (
 // contains duplicate metrics or invalid metric or label names, the conversion
 // will result in invalid text format output.
 //
+// If metric names conform to the legacy validation pattern, they will be placed
+// outside the brackets in the traditional way, like `foo{}`. If the metric name
+// fails the legacy validation check, it will be placed quoted inside the
+// brackets: `{"foo"}`. As stated above, the input is assumed to be santized and
+// no error will be thrown in this case.
+//
+// Similar to metric names, if label names conform to the legacy validation
+// pattern, they will be unquoted as normal, like `foo{bar="baz"}`. If the label
+// name fails the legacy validation check, it will be quoted:
+// `foo{"bar"="baz"}`. As stated above, the input is assumed to be santized and
+// no error will be thrown in this case.
+//
 // This method fulfills the type 'prometheus.encoder'.
 func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (written int, err error) {
 	// Fail-fast checks.
@@ -99,7 +110,7 @@ func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (written int, err e
 		if err != nil {
 			return
 		}
-		n, err = w.WriteString(name)
+		n, err = writeName(w, name)
 		written += n
 		if err != nil {
 			return
@@ -125,7 +136,7 @@ func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (written int, err e
 	if err != nil {
 		return
 	}
-	n, err = w.WriteString(name)
+	n, err = writeName(w, name)
 	written += n
 	if err != nil {
 		return
@@ -281,21 +292,9 @@ func writeSample(
 	additionalLabelName string, additionalLabelValue float64,
 	value float64,
 ) (int, error) {
-	var written int
+	written := 0
-	n, err := w.WriteString(name)
+	n, err := writeNameAndLabelPairs(
-	written += n
+		w, name+suffix, metric.Label, additionalLabelName, additionalLabelValue,
-	if err != nil {
-		return written, err
-	}
-	if suffix != "" {
-		n, err = w.WriteString(suffix)
-		written += n
-		if err != nil {
-			return written, err
-		}
-	}
-	n, err = writeLabelPairs(
-		w, metric.Label, additionalLabelName, additionalLabelValue,
 	)
 	written += n
 	if err != nil {
@@ -331,32 +330,64 @@ func writeSample(
 	return written, nil
 }
 
-// writeLabelPairs converts a slice of LabelPair proto messages plus the
+// writeNameAndLabelPairs converts a slice of LabelPair proto messages plus the
-// explicitly given additional label pair into text formatted as required by the
+// explicitly given metric name and additional label pair into text formatted as
-// text format and writes it to 'w'. An empty slice in combination with an empty
+// required by the text format and writes it to 'w'. An empty slice in
-// string 'additionalLabelName' results in nothing being written. Otherwise, the
+// combination with an empty string 'additionalLabelName' results in nothing
-// label pairs are written, escaped as required by the text format, and enclosed
+// being written. Otherwise, the label pairs are written, escaped as required by
-// in '{...}'. The function returns the number of bytes written and any error
+// the text format, and enclosed in '{...}'. The function returns the number of
-// encountered.
+// bytes written and any error encountered. If the metric name is not
-func writeLabelPairs(
+// legacy-valid, it will be put inside the brackets as well. Legacy-invalid
+// label names will also be quoted.
+func writeNameAndLabelPairs(
 	w enhancedWriter,
+	name string,
 	in []*dto.LabelPair,
 	additionalLabelName string, additionalLabelValue float64,
 ) (int, error) {
-	if len(in) == 0 && additionalLabelName == "" {
-		return 0, nil
-	}
 	var (
-		written   int
+		written            int
-		separator byte = '{'
+		separator          byte = '{'
+		metricInsideBraces      = false
 	)
+
+	if name != "" {
+		// If the name does not pass the legacy validity check, we must put the
+		// metric name inside the braces.
+		if !model.IsValidLegacyMetricName(model.LabelValue(name)) {
+			metricInsideBraces = true
+			err := w.WriteByte(separator)
+			written++
+			if err != nil {
+				return written, err
+			}
+			separator = ','
+		}
+		n, err := writeName(w, name)
+		written += n
+		if err != nil {
+			return written, err
+		}
+	}
+
+	if len(in) == 0 && additionalLabelName == "" {
+		if metricInsideBraces {
+			err := w.WriteByte('}')
+			written++
+			if err != nil {
+				return written, err
+			}
+		}
+		return written, nil
+	}
+
 	for _, lp := range in {
 		err := w.WriteByte(separator)
 		written++
 		if err != nil {
 			return written, err
 		}
-		n, err := w.WriteString(lp.GetName())
+		n, err := writeName(w, lp.GetName())
 		written += n
 		if err != nil {
 			return written, err
@@ -463,3 +494,27 @@ func writeInt(w enhancedWriter, i int64) (int, error) {
 	numBufPool.Put(bp)
 	return written, err
 }
+
+// writeName writes a string as-is if it complies with the legacy naming
+// scheme, or escapes it in double quotes if not.
+func writeName(w enhancedWriter, name string) (int, error) {
+	if model.IsValidLegacyMetricName(model.LabelValue(name)) {
+		return w.WriteString(name)
+	}
+	var written int
+	var err error
+	err = w.WriteByte('"')
+	written++
+	if err != nil {
+		return written, err
+	}
+	var n int
+	n, err = writeEscapedString(w, name, true)
+	written += n
+	if err != nil {
+		return written, err
+	}
+	err = w.WriteByte('"')
+	written++
+	return written, err
+}

vendor/github.com/prometheus/common/expfmt/text_parse.go

@@ -16,6 +16,7 @@ package expfmt
 import (
 	"bufio"
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"math"
@@ -24,7 +25,8 @@ import (
 
 	dto "github.com/prometheus/client_model/go"
 
-	"github.com/golang/protobuf/proto" //nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
+	"google.golang.org/protobuf/proto"
+
 	"github.com/prometheus/common/model"
 )
 
@@ -112,7 +114,7 @@ func (p *TextParser) TextToMetricFamilies(in io.Reader) (map[string]*dto.MetricF
 	// stream. Turn this error into something nicer and more
 	// meaningful. (io.EOF is often used as a signal for the legitimate end
 	// of an input stream.)
-	if p.err == io.EOF {
+	if p.err != nil && errors.Is(p.err, io.EOF) {
 		p.parseError("unexpected end of input stream")
 	}
 	return p.metricFamiliesByName, p.err
@@ -142,9 +144,13 @@ func (p *TextParser) reset(in io.Reader) {
 func (p *TextParser) startOfLine() stateFn {
 	p.lineCount++
 	if p.skipBlankTab(); p.err != nil {
-		// End of input reached. This is the only case where
+		// This is the only place that we expect to see io.EOF,
-		// that is not an error but a signal that we are done.
+		// which is not an error but the signal that we are done.
-		p.err = nil
+		// Any other error that happens to align with the start of
+		// a line is still an error.
+		if errors.Is(p.err, io.EOF) {
+			p.err = nil
+		}
 		return nil
 	}
 	switch p.currentByte {

vendor/github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg/autoneg.go

@@ -11,18 +11,18 @@ Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
 
-    Redistributions of source code must retain the above copyright
+	Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
+	notice, this list of conditions and the following disclaimer.
 
-    Redistributions in binary form must reproduce the above copyright
+	Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
+	notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
+	the documentation and/or other materials provided with the
-    distribution.
+	distribution.
 
-    Neither the name of the Open Knowledge Foundation Ltd. nor the
+	Neither the name of the Open Knowledge Foundation Ltd. nor the
-    names of its contributors may be used to endorse or promote
+	names of its contributors may be used to endorse or promote
-    products derived from this software without specific prior written
+	products derived from this software without specific prior written
-    permission.
+	permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
@@ -35,8 +35,6 @@ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
 */
 package goautoneg
 

vendor/github.com/prometheus/common/model/alert.go

@@ -90,13 +90,13 @@ func (a *Alert) Validate() error {
 		return fmt.Errorf("start time must be before end time")
 	}
 	if err := a.Labels.Validate(); err != nil {
-		return fmt.Errorf("invalid label set: %s", err)
+		return fmt.Errorf("invalid label set: %w", err)
 	}
 	if len(a.Labels) == 0 {
 		return fmt.Errorf("at least one label pair required")
 	}
 	if err := a.Annotations.Validate(); err != nil {
-		return fmt.Errorf("invalid annotations: %s", err)
+		return fmt.Errorf("invalid annotations: %w", err)
 	}
 	return nil
 }

vendor/github.com/prometheus/common/model/labels.go

@@ -97,17 +97,25 @@ var LabelNameRE = regexp.MustCompile("^[a-zA-Z_][a-zA-Z0-9_]*$")
 // therewith.
 type LabelName string
 
-// IsValid is true iff the label name matches the pattern of LabelNameRE. This
+// IsValid returns true iff name matches the pattern of LabelNameRE for legacy
-// method, however, does not use LabelNameRE for the check but a much faster
+// names, and iff it's valid UTF-8 if NameValidationScheme is set to
-// hardcoded implementation.
+// UTF8Validation. For the legacy matching, it does not use LabelNameRE for the
+// check but a much faster hardcoded implementation.
 func (ln LabelName) IsValid() bool {
 	if len(ln) == 0 {
 		return false
 	}
-	for i, b := range ln {
+	switch NameValidationScheme {
-		if !((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || (b >= '0' && b <= '9' && i > 0)) {
+	case LegacyValidation:
-			return false
+		for i, b := range ln {
+			if !((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || (b >= '0' && b <= '9' && i > 0)) {
+				return false
+			}
 		}
+	case UTF8Validation:
+		return utf8.ValidString(string(ln))
+	default:
+		panic(fmt.Sprintf("Invalid name validation scheme requested: %d", NameValidationScheme))
 	}
 	return true
 }
@@ -164,7 +172,7 @@ func (l LabelNames) String() string {
 // A LabelValue is an associated value for a LabelName.
 type LabelValue string
 
-// IsValid returns true iff the string is a valid UTF8.
+// IsValid returns true iff the string is a valid UTF-8.
 func (lv LabelValue) IsValid() bool {
 	return utf8.ValidString(string(lv))
 }

vendor/github.com/prometheus/common/model/metadata.go

@@ -0,0 +1,28 @@
+// Copyright 2023 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+// MetricType represents metric type values.
+type MetricType string
+
+const (
+	MetricTypeCounter        = MetricType("counter")
+	MetricTypeGauge          = MetricType("gauge")
+	MetricTypeHistogram      = MetricType("histogram")
+	MetricTypeGaugeHistogram = MetricType("gaugehistogram")
+	MetricTypeSummary        = MetricType("summary")
+	MetricTypeInfo           = MetricType("info")
+	MetricTypeStateset       = MetricType("stateset")
+	MetricTypeUnknown        = MetricType("unknown")
+)

vendor/github.com/prometheus/common/model/metric.go

@@ -18,15 +18,84 @@ import (
 	"regexp"
 	"sort"
 	"strings"
+	"unicode/utf8"
+
+	dto "github.com/prometheus/client_model/go"
+	"google.golang.org/protobuf/proto"
 )
 
 var (
-	// MetricNameRE is a regular expression matching valid metric
+	// NameValidationScheme determines the method of name validation to be used by
-	// names. Note that the IsValidMetricName function performs the same
+	// all calls to IsValidMetricName() and LabelName IsValid(). Setting UTF-8 mode
-	// check but faster than a match with this regular expression.
+	// in isolation from other components that don't support UTF-8 may result in
-	MetricNameRE = regexp.MustCompile(`^[a-zA-Z_:][a-zA-Z0-9_:]*$`)
+	// bugs or other undefined behavior. This value is intended to be set by
+	// UTF-8-aware binaries as part of their startup. To avoid need for locking,
+	// this value should be set once, ideally in an init(), before multiple
+	// goroutines are started.
+	NameValidationScheme = LegacyValidation
+
+	// NameEscapingScheme defines the default way that names will be
+	// escaped when presented to systems that do not support UTF-8 names. If the
+	// Content-Type "escaping" term is specified, that will override this value.
+	NameEscapingScheme = ValueEncodingEscaping
 )
 
+// ValidationScheme is a Go enum for determining how metric and label names will
+// be validated by this library.
+type ValidationScheme int
+
+const (
+	// LegacyValidation is a setting that requirets that metric and label names
+	// conform to the original Prometheus character requirements described by
+	// MetricNameRE and LabelNameRE.
+	LegacyValidation ValidationScheme = iota
+
+	// UTF8Validation only requires that metric and label names be valid UTF-8
+	// strings.
+	UTF8Validation
+)
+
+type EscapingScheme int
+
+const (
+	// NoEscaping indicates that a name will not be escaped. Unescaped names that
+	// do not conform to the legacy validity check will use a new exposition
+	// format syntax that will be officially standardized in future versions.
+	NoEscaping EscapingScheme = iota
+
+	// UnderscoreEscaping replaces all legacy-invalid characters with underscores.
+	UnderscoreEscaping
+
+	// DotsEscaping is similar to UnderscoreEscaping, except that dots are
+	// converted to `_dot_` and pre-existing underscores are converted to `__`.
+	DotsEscaping
+
+	// ValueEncodingEscaping prepends the name with `U__` and replaces all invalid
+	// characters with the unicode value, surrounded by underscores. Single
+	// underscores are replaced with double underscores.
+	ValueEncodingEscaping
+)
+
+const (
+	// EscapingKey is the key in an Accept or Content-Type header that defines how
+	// metric and label names that do not conform to the legacy character
+	// requirements should be escaped when being scraped by a legacy prometheus
+	// system. If a system does not explicitly pass an escaping parameter in the
+	// Accept header, the default NameEscapingScheme will be used.
+	EscapingKey = "escaping"
+
+	// Possible values for Escaping Key:
+	AllowUTF8         = "allow-utf-8" // No escaping required.
+	EscapeUnderscores = "underscores"
+	EscapeDots        = "dots"
+	EscapeValues      = "values"
+)
+
+// MetricNameRE is a regular expression matching valid metric
+// names. Note that the IsValidMetricName function performs the same
+// check but faster than a match with this regular expression.
+var MetricNameRE = regexp.MustCompile(`^[a-zA-Z_:][a-zA-Z0-9_:]*$`)
+
 // A Metric is similar to a LabelSet, but the key difference is that a Metric is
 // a singleton and refers to one and only one stream of samples.
 type Metric LabelSet
@@ -86,17 +155,302 @@ func (m Metric) FastFingerprint() Fingerprint {
 	return LabelSet(m).FastFingerprint()
 }
 
-// IsValidMetricName returns true iff name matches the pattern of MetricNameRE.
+// IsValidMetricName returns true iff name matches the pattern of MetricNameRE
+// for legacy names, and iff it's valid UTF-8 if the UTF8Validation scheme is
+// selected.
+func IsValidMetricName(n LabelValue) bool {
+	switch NameValidationScheme {
+	case LegacyValidation:
+		return IsValidLegacyMetricName(n)
+	case UTF8Validation:
+		if len(n) == 0 {
+			return false
+		}
+		return utf8.ValidString(string(n))
+	default:
+		panic(fmt.Sprintf("Invalid name validation scheme requested: %d", NameValidationScheme))
+	}
+}
+
+// IsValidLegacyMetricName is similar to IsValidMetricName but always uses the
+// legacy validation scheme regardless of the value of NameValidationScheme.
 // This function, however, does not use MetricNameRE for the check but a much
 // faster hardcoded implementation.
-func IsValidMetricName(n LabelValue) bool {
+func IsValidLegacyMetricName(n LabelValue) bool {
 	if len(n) == 0 {
 		return false
 	}
 	for i, b := range n {
-		if !((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || b == ':' || (b >= '0' && b <= '9' && i > 0)) {
+		if !isValidLegacyRune(b, i) {
 			return false
 		}
 	}
 	return true
 }
+
+// EscapeMetricFamily escapes the given metric names and labels with the given
+// escaping scheme. Returns a new object that uses the same pointers to fields
+// when possible and creates new escaped versions so as not to mutate the
+// input.
+func EscapeMetricFamily(v *dto.MetricFamily, scheme EscapingScheme) *dto.MetricFamily {
+	if v == nil {
+		return nil
+	}
+
+	if scheme == NoEscaping {
+		return v
+	}
+
+	out := &dto.MetricFamily{
+		Help: v.Help,
+		Type: v.Type,
+	}
+
+	// If the name is nil, copy as-is, don't try to escape.
+	if v.Name == nil || IsValidLegacyMetricName(LabelValue(v.GetName())) {
+		out.Name = v.Name
+	} else {
+		out.Name = proto.String(EscapeName(v.GetName(), scheme))
+	}
+	for _, m := range v.Metric {
+		if !metricNeedsEscaping(m) {
+			out.Metric = append(out.Metric, m)
+			continue
+		}
+
+		escaped := &dto.Metric{
+			Gauge:       m.Gauge,
+			Counter:     m.Counter,
+			Summary:     m.Summary,
+			Untyped:     m.Untyped,
+			Histogram:   m.Histogram,
+			TimestampMs: m.TimestampMs,
+		}
+
+		for _, l := range m.Label {
+			if l.GetName() == MetricNameLabel {
+				if l.Value == nil || IsValidLegacyMetricName(LabelValue(l.GetValue())) {
+					escaped.Label = append(escaped.Label, l)
+					continue
+				}
+				escaped.Label = append(escaped.Label, &dto.LabelPair{
+					Name:  proto.String(MetricNameLabel),
+					Value: proto.String(EscapeName(l.GetValue(), scheme)),
+				})
+				continue
+			}
+			if l.Name == nil || IsValidLegacyMetricName(LabelValue(l.GetName())) {
+				escaped.Label = append(escaped.Label, l)
+				continue
+			}
+			escaped.Label = append(escaped.Label, &dto.LabelPair{
+				Name:  proto.String(EscapeName(l.GetName(), scheme)),
+				Value: l.Value,
+			})
+		}
+		out.Metric = append(out.Metric, escaped)
+	}
+	return out
+}
+
+func metricNeedsEscaping(m *dto.Metric) bool {
+	for _, l := range m.Label {
+		if l.GetName() == MetricNameLabel && !IsValidLegacyMetricName(LabelValue(l.GetValue())) {
+			return true
+		}
+		if !IsValidLegacyMetricName(LabelValue(l.GetName())) {
+			return true
+		}
+	}
+	return false
+}
+
+const (
+	lowerhex = "0123456789abcdef"
+)
+
+// EscapeName escapes the incoming name according to the provided escaping
+// scheme. Depending on the rules of escaping, this may cause no change in the
+// string that is returned. (Especially NoEscaping, which by definition is a
+// noop). This function does not do any validation of the name.
+func EscapeName(name string, scheme EscapingScheme) string {
+	if len(name) == 0 {
+		return name
+	}
+	var escaped strings.Builder
+	switch scheme {
+	case NoEscaping:
+		return name
+	case UnderscoreEscaping:
+		if IsValidLegacyMetricName(LabelValue(name)) {
+			return name
+		}
+		for i, b := range name {
+			if isValidLegacyRune(b, i) {
+				escaped.WriteRune(b)
+			} else {
+				escaped.WriteRune('_')
+			}
+		}
+		return escaped.String()
+	case DotsEscaping:
+		// Do not early return for legacy valid names, we still escape underscores.
+		for i, b := range name {
+			if b == '_' {
+				escaped.WriteString("__")
+			} else if b == '.' {
+				escaped.WriteString("_dot_")
+			} else if isValidLegacyRune(b, i) {
+				escaped.WriteRune(b)
+			} else {
+				escaped.WriteRune('_')
+			}
+		}
+		return escaped.String()
+	case ValueEncodingEscaping:
+		if IsValidLegacyMetricName(LabelValue(name)) {
+			return name
+		}
+		escaped.WriteString("U__")
+		for i, b := range name {
+			if isValidLegacyRune(b, i) {
+				escaped.WriteRune(b)
+			} else if !utf8.ValidRune(b) {
+				escaped.WriteString("_FFFD_")
+			} else if b < 0x100 {
+				escaped.WriteRune('_')
+				for s := 4; s >= 0; s -= 4 {
+					escaped.WriteByte(lowerhex[b>>uint(s)&0xF])
+				}
+				escaped.WriteRune('_')
+			} else if b < 0x10000 {
+				escaped.WriteRune('_')
+				for s := 12; s >= 0; s -= 4 {
+					escaped.WriteByte(lowerhex[b>>uint(s)&0xF])
+				}
+				escaped.WriteRune('_')
+			}
+		}
+		return escaped.String()
+	default:
+		panic(fmt.Sprintf("invalid escaping scheme %d", scheme))
+	}
+}
+
+// lower function taken from strconv.atoi
+func lower(c byte) byte {
+	return c | ('x' - 'X')
+}
+
+// UnescapeName unescapes the incoming name according to the provided escaping
+// scheme if possible. Some schemes are partially or totally non-roundtripable.
+// If any error is enountered, returns the original input.
+func UnescapeName(name string, scheme EscapingScheme) string {
+	if len(name) == 0 {
+		return name
+	}
+	switch scheme {
+	case NoEscaping:
+		return name
+	case UnderscoreEscaping:
+		// It is not possible to unescape from underscore replacement.
+		return name
+	case DotsEscaping:
+		name = strings.ReplaceAll(name, "_dot_", ".")
+		name = strings.ReplaceAll(name, "__", "_")
+		return name
+	case ValueEncodingEscaping:
+		escapedName, found := strings.CutPrefix(name, "U__")
+		if !found {
+			return name
+		}
+
+		var unescaped strings.Builder
+	TOP:
+		for i := 0; i < len(escapedName); i++ {
+			// All non-underscores are treated normally.
+			if escapedName[i] != '_' {
+				unescaped.WriteByte(escapedName[i])
+				continue
+			}
+			i++
+			if i >= len(escapedName) {
+				return name
+			}
+			// A double underscore is a single underscore.
+			if escapedName[i] == '_' {
+				unescaped.WriteByte('_')
+				continue
+			}
+			// We think we are in a UTF-8 code, process it.
+			var utf8Val uint
+			for j := 0; i < len(escapedName); j++ {
+				// This is too many characters for a utf8 value.
+				if j > 4 {
+					return name
+				}
+				// Found a closing underscore, convert to a rune, check validity, and append.
+				if escapedName[i] == '_' {
+					utf8Rune := rune(utf8Val)
+					if !utf8.ValidRune(utf8Rune) {
+						return name
+					}
+					unescaped.WriteRune(utf8Rune)
+					continue TOP
+				}
+				r := lower(escapedName[i])
+				utf8Val *= 16
+				if r >= '0' && r <= '9' {
+					utf8Val += uint(r) - '0'
+				} else if r >= 'a' && r <= 'f' {
+					utf8Val += uint(r) - 'a' + 10
+				} else {
+					return name
+				}
+				i++
+			}
+			// Didn't find closing underscore, invalid.
+			return name
+		}
+		return unescaped.String()
+	default:
+		panic(fmt.Sprintf("invalid escaping scheme %d", scheme))
+	}
+}
+
+func isValidLegacyRune(b rune, i int) bool {
+	return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_' || b == ':' || (b >= '0' && b <= '9' && i > 0)
+}
+
+func (e EscapingScheme) String() string {
+	switch e {
+	case NoEscaping:
+		return AllowUTF8
+	case UnderscoreEscaping:
+		return EscapeUnderscores
+	case DotsEscaping:
+		return EscapeDots
+	case ValueEncodingEscaping:
+		return EscapeValues
+	default:
+		panic(fmt.Sprintf("unknown format scheme %d", e))
+	}
+}
+
+func ToEscapingScheme(s string) (EscapingScheme, error) {
+	if s == "" {
+		return NoEscaping, fmt.Errorf("got empty string instead of escaping scheme")
+	}
+	switch s {
+	case AllowUTF8:
+		return NoEscaping, nil
+	case EscapeUnderscores:
+		return UnderscoreEscaping, nil
+	case EscapeDots:
+		return DotsEscaping, nil
+	case EscapeValues:
+		return ValueEncodingEscaping, nil
+	default:
+		return NoEscaping, fmt.Errorf("unknown format scheme " + s)
+	}
+}

vendor/github.com/prometheus/common/model/signature.go

@@ -22,10 +22,8 @@ import (
 // when calculating their combined hash value (aka signature aka fingerprint).
 const SeparatorByte byte = 255
 
-var (
+// cache the signature of an empty label set.
-	// cache the signature of an empty label set.
+var emptyLabelSignature = hashNew()
-	emptyLabelSignature = hashNew()
-)
 
 // LabelsToSignature returns a quasi-unique signature (i.e., fingerprint) for a
 // given label set. (Collisions are possible but unlikely if the number of label

vendor/github.com/prometheus/common/model/silence.go

@@ -81,7 +81,7 @@ func (s *Silence) Validate() error {
 	}
 	for _, m := range s.Matchers {
 		if err := m.Validate(); err != nil {
-			return fmt.Errorf("invalid matcher: %s", err)
+			return fmt.Errorf("invalid matcher: %w", err)
 		}
 	}
 	if s.StartsAt.IsZero() {

vendor/github.com/prometheus/common/model/time.go

@@ -18,7 +18,6 @@ import (
 	"errors"
 	"fmt"
 	"math"
-	"regexp"
 	"strconv"
 	"strings"
 	"time"
@@ -183,54 +182,78 @@ func (d *Duration) Type() string {
 	return "duration"
 }
 
-var durationRE = regexp.MustCompile("^(([0-9]+)y)?(([0-9]+)w)?(([0-9]+)d)?(([0-9]+)h)?(([0-9]+)m)?(([0-9]+)s)?(([0-9]+)ms)?$")
+func isdigit(c byte) bool { return c >= '0' && c <= '9' }
+
+// Units are required to go in order from biggest to smallest.
+// This guards against confusion from "1m1d" being 1 minute + 1 day, not 1 month + 1 day.
+var unitMap = map[string]struct {
+	pos  int
+	mult uint64
+}{
+	"ms": {7, uint64(time.Millisecond)},
+	"s":  {6, uint64(time.Second)},
+	"m":  {5, uint64(time.Minute)},
+	"h":  {4, uint64(time.Hour)},
+	"d":  {3, uint64(24 * time.Hour)},
+	"w":  {2, uint64(7 * 24 * time.Hour)},
+	"y":  {1, uint64(365 * 24 * time.Hour)},
+}
 
 // ParseDuration parses a string into a time.Duration, assuming that a year
 // always has 365d, a week always has 7d, and a day always has 24h.
-func ParseDuration(durationStr string) (Duration, error) {
+func ParseDuration(s string) (Duration, error) {
-	switch durationStr {
+	switch s {
 	case "0":
 		// Allow 0 without a unit.
 		return 0, nil
 	case "":
 		return 0, errors.New("empty duration string")
 	}
-	matches := durationRE.FindStringSubmatch(durationStr)
-	if matches == nil {
-		return 0, fmt.Errorf("not a valid duration string: %q", durationStr)
-	}
-	var dur time.Duration
 
-	// Parse the match at pos `pos` in the regex and use `mult` to turn that
+	orig := s
-	// into ms, then add that value to the total parsed duration.
+	var dur uint64
-	var overflowErr error
+	lastUnitPos := 0
-	m := func(pos int, mult time.Duration) {
+
-		if matches[pos] == "" {
+	for s != "" {
-			return
+		if !isdigit(s[0]) {
+			return 0, fmt.Errorf("not a valid duration string: %q", orig)
 		}
-		n, _ := strconv.Atoi(matches[pos])
+		// Consume [0-9]*
+		i := 0
+		for ; i < len(s) && isdigit(s[i]); i++ {
+		}
+		v, err := strconv.ParseUint(s[:i], 10, 0)
+		if err != nil {
+			return 0, fmt.Errorf("not a valid duration string: %q", orig)
+		}
+		s = s[i:]
 
+		// Consume unit.
+		for i = 0; i < len(s) && !isdigit(s[i]); i++ {
+		}
+		if i == 0 {
+			return 0, fmt.Errorf("not a valid duration string: %q", orig)
+		}
+		u := s[:i]
+		s = s[i:]
+		unit, ok := unitMap[u]
+		if !ok {
+			return 0, fmt.Errorf("unknown unit %q in duration %q", u, orig)
+		}
+		if unit.pos <= lastUnitPos { // Units must go in order from biggest to smallest.
+			return 0, fmt.Errorf("not a valid duration string: %q", orig)
+		}
+		lastUnitPos = unit.pos
 		// Check if the provided duration overflows time.Duration (> ~ 290years).
-		if n > int((1<<63-1)/mult/time.Millisecond) {
+		if v > 1<<63/unit.mult {
-			overflowErr = errors.New("duration out of range")
+			return 0, errors.New("duration out of range")
 		}
-		d := time.Duration(n) * time.Millisecond
+		dur += v * unit.mult
-		dur += d * mult
+		if dur > 1<<63-1 {
-
+			return 0, errors.New("duration out of range")
-		if dur < 0 {
-			overflowErr = errors.New("duration out of range")
 		}
 	}
-
+	return Duration(dur), nil
-	m(2, 1000*60*60*24*365) // y
-	m(4, 1000*60*60*24*7)   // w
-	m(6, 1000*60*60*24)     // d
-	m(8, 1000*60*60)        // h
-	m(10, 1000*60)          // m
-	m(12, 1000)             // s
-	m(14, 1)                // ms
-
-	return Duration(dur), overflowErr
 }
 
 func (d Duration) String() string {

vendor/github.com/prometheus/common/model/value.go

@@ -16,104 +16,26 @@ package model
 import (
 	"encoding/json"
 	"fmt"
-	"math"
 	"sort"
 	"strconv"
 	"strings"
 )
 
-var (
+// ZeroSample is the pseudo zero-value of Sample used to signal a
-	// ZeroSamplePair is the pseudo zero-value of SamplePair used to signal a
+// non-existing sample. It is a Sample with timestamp Earliest, value 0.0,
-	// non-existing sample pair. It is a SamplePair with timestamp Earliest and
+// and metric nil. Note that the natural zero value of Sample has a timestamp
-	// value 0.0. Note that the natural zero value of SamplePair has a timestamp
+// of 0, which is possible to appear in a real Sample and thus not suitable
-	// of 0, which is possible to appear in a real SamplePair and thus not
+// to signal a non-existing Sample.
-	// suitable to signal a non-existing SamplePair.
+var ZeroSample = Sample{Timestamp: Earliest}
-	ZeroSamplePair = SamplePair{Timestamp: Earliest}
 
-	// ZeroSample is the pseudo zero-value of Sample used to signal a
+// Sample is a sample pair associated with a metric. A single sample must either
-	// non-existing sample. It is a Sample with timestamp Earliest, value 0.0,
+// define Value or Histogram but not both. Histogram == nil implies the Value
-	// and metric nil. Note that the natural zero value of Sample has a timestamp
+// field is used, otherwise it should be ignored.
-	// of 0, which is possible to appear in a real Sample and thus not suitable
-	// to signal a non-existing Sample.
-	ZeroSample = Sample{Timestamp: Earliest}
-)
-
-// A SampleValue is a representation of a value for a given sample at a given
-// time.
-type SampleValue float64
-
-// MarshalJSON implements json.Marshaler.
-func (v SampleValue) MarshalJSON() ([]byte, error) {
-	return json.Marshal(v.String())
-}
-
-// UnmarshalJSON implements json.Unmarshaler.
-func (v *SampleValue) UnmarshalJSON(b []byte) error {
-	if len(b) < 2 || b[0] != '"' || b[len(b)-1] != '"' {
-		return fmt.Errorf("sample value must be a quoted string")
-	}
-	f, err := strconv.ParseFloat(string(b[1:len(b)-1]), 64)
-	if err != nil {
-		return err
-	}
-	*v = SampleValue(f)
-	return nil
-}
-
-// Equal returns true if the value of v and o is equal or if both are NaN. Note
-// that v==o is false if both are NaN. If you want the conventional float
-// behavior, use == to compare two SampleValues.
-func (v SampleValue) Equal(o SampleValue) bool {
-	if v == o {
-		return true
-	}
-	return math.IsNaN(float64(v)) && math.IsNaN(float64(o))
-}
-
-func (v SampleValue) String() string {
-	return strconv.FormatFloat(float64(v), 'f', -1, 64)
-}
-
-// SamplePair pairs a SampleValue with a Timestamp.
-type SamplePair struct {
-	Timestamp Time
-	Value     SampleValue
-}
-
-// MarshalJSON implements json.Marshaler.
-func (s SamplePair) MarshalJSON() ([]byte, error) {
-	t, err := json.Marshal(s.Timestamp)
-	if err != nil {
-		return nil, err
-	}
-	v, err := json.Marshal(s.Value)
-	if err != nil {
-		return nil, err
-	}
-	return []byte(fmt.Sprintf("[%s,%s]", t, v)), nil
-}
-
-// UnmarshalJSON implements json.Unmarshaler.
-func (s *SamplePair) UnmarshalJSON(b []byte) error {
-	v := [...]json.Unmarshaler{&s.Timestamp, &s.Value}
-	return json.Unmarshal(b, &v)
-}
-
-// Equal returns true if this SamplePair and o have equal Values and equal
-// Timestamps. The semantics of Value equality is defined by SampleValue.Equal.
-func (s *SamplePair) Equal(o *SamplePair) bool {
-	return s == o || (s.Value.Equal(o.Value) && s.Timestamp.Equal(o.Timestamp))
-}
-
-func (s SamplePair) String() string {
-	return fmt.Sprintf("%s @[%s]", s.Value, s.Timestamp)
-}
-
-// Sample is a sample pair associated with a metric.
 type Sample struct {
-	Metric    Metric      `json:"metric"`
+	Metric    Metric           `json:"metric"`
-	Value     SampleValue `json:"value"`
+	Value     SampleValue      `json:"value"`
-	Timestamp Time        `json:"timestamp"`
+	Timestamp Time             `json:"timestamp"`
+	Histogram *SampleHistogram `json:"histogram"`
 }
 
 // Equal compares first the metrics, then the timestamp, then the value. The
@@ -129,11 +51,19 @@ func (s *Sample) Equal(o *Sample) bool {
 	if !s.Timestamp.Equal(o.Timestamp) {
 		return false
 	}
-
+	if s.Histogram != nil {
+		return s.Histogram.Equal(o.Histogram)
+	}
 	return s.Value.Equal(o.Value)
 }
 
 func (s Sample) String() string {
+	if s.Histogram != nil {
+		return fmt.Sprintf("%s => %s", s.Metric, SampleHistogramPair{
+			Timestamp: s.Timestamp,
+			Histogram: s.Histogram,
+		})
+	}
 	return fmt.Sprintf("%s => %s", s.Metric, SamplePair{
 		Timestamp: s.Timestamp,
 		Value:     s.Value,
@@ -142,6 +72,19 @@ func (s Sample) String() string {
 
 // MarshalJSON implements json.Marshaler.
 func (s Sample) MarshalJSON() ([]byte, error) {
+	if s.Histogram != nil {
+		v := struct {
+			Metric    Metric              `json:"metric"`
+			Histogram SampleHistogramPair `json:"histogram"`
+		}{
+			Metric: s.Metric,
+			Histogram: SampleHistogramPair{
+				Timestamp: s.Timestamp,
+				Histogram: s.Histogram,
+			},
+		}
+		return json.Marshal(&v)
+	}
 	v := struct {
 		Metric Metric     `json:"metric"`
 		Value  SamplePair `json:"value"`
@@ -152,21 +95,25 @@ func (s Sample) MarshalJSON() ([]byte, error) {
 			Value:     s.Value,
 		},
 	}
-
 	return json.Marshal(&v)
 }
 
 // UnmarshalJSON implements json.Unmarshaler.
 func (s *Sample) UnmarshalJSON(b []byte) error {
 	v := struct {
-		Metric Metric     `json:"metric"`
+		Metric    Metric              `json:"metric"`
-		Value  SamplePair `json:"value"`
+		Value     SamplePair          `json:"value"`
+		Histogram SampleHistogramPair `json:"histogram"`
 	}{
 		Metric: s.Metric,
 		Value: SamplePair{
 			Timestamp: s.Timestamp,
 			Value:     s.Value,
 		},
+		Histogram: SampleHistogramPair{
+			Timestamp: s.Timestamp,
+			Histogram: s.Histogram,
+		},
 	}
 
 	if err := json.Unmarshal(b, &v); err != nil {
@@ -174,8 +121,13 @@ func (s *Sample) UnmarshalJSON(b []byte) error {
 	}
 
 	s.Metric = v.Metric
-	s.Timestamp = v.Value.Timestamp
+	if v.Histogram.Histogram != nil {
-	s.Value = v.Value.Value
+		s.Timestamp = v.Histogram.Timestamp
+		s.Histogram = v.Histogram.Histogram
+	} else {
+		s.Timestamp = v.Value.Timestamp
+		s.Value = v.Value.Value
+	}
 
 	return nil
 }
@@ -221,80 +173,76 @@ func (s Samples) Equal(o Samples) bool {
 
 // SampleStream is a stream of Values belonging to an attached COWMetric.
 type SampleStream struct {
-	Metric Metric       `json:"metric"`
+	Metric     Metric                `json:"metric"`
-	Values []SamplePair `json:"values"`
+	Values     []SamplePair          `json:"values"`
+	Histograms []SampleHistogramPair `json:"histograms"`
 }
 
 func (ss SampleStream) String() string {
-	vals := make([]string, len(ss.Values))
+	valuesLength := len(ss.Values)
+	vals := make([]string, valuesLength+len(ss.Histograms))
 	for i, v := range ss.Values {
 		vals[i] = v.String()
 	}
+	for i, v := range ss.Histograms {
+		vals[i+valuesLength] = v.String()
+	}
 	return fmt.Sprintf("%s =>\n%s", ss.Metric, strings.Join(vals, "\n"))
 }
 
-// Value is a generic interface for values resulting from a query evaluation.
+func (ss SampleStream) MarshalJSON() ([]byte, error) {
-type Value interface {
+	if len(ss.Histograms) > 0 && len(ss.Values) > 0 {
-	Type() ValueType
+		v := struct {
-	String() string
+			Metric     Metric                `json:"metric"`
+			Values     []SamplePair          `json:"values"`
+			Histograms []SampleHistogramPair `json:"histograms"`
+		}{
+			Metric:     ss.Metric,
+			Values:     ss.Values,
+			Histograms: ss.Histograms,
+		}
+		return json.Marshal(&v)
+	} else if len(ss.Histograms) > 0 {
+		v := struct {
+			Metric     Metric                `json:"metric"`
+			Histograms []SampleHistogramPair `json:"histograms"`
+		}{
+			Metric:     ss.Metric,
+			Histograms: ss.Histograms,
+		}
+		return json.Marshal(&v)
+	} else {
+		v := struct {
+			Metric Metric       `json:"metric"`
+			Values []SamplePair `json:"values"`
+		}{
+			Metric: ss.Metric,
+			Values: ss.Values,
+		}
+		return json.Marshal(&v)
+	}
 }
 
-func (Matrix) Type() ValueType  { return ValMatrix }
+func (ss *SampleStream) UnmarshalJSON(b []byte) error {
-func (Vector) Type() ValueType  { return ValVector }
+	v := struct {
-func (*Scalar) Type() ValueType { return ValScalar }
+		Metric     Metric                `json:"metric"`
-func (*String) Type() ValueType { return ValString }
+		Values     []SamplePair          `json:"values"`
+		Histograms []SampleHistogramPair `json:"histograms"`
+	}{
+		Metric:     ss.Metric,
+		Values:     ss.Values,
+		Histograms: ss.Histograms,
+	}
 
-type ValueType int
+	if err := json.Unmarshal(b, &v); err != nil {
-
-const (
-	ValNone ValueType = iota
-	ValScalar
-	ValVector
-	ValMatrix
-	ValString
-)
-
-// MarshalJSON implements json.Marshaler.
-func (et ValueType) MarshalJSON() ([]byte, error) {
-	return json.Marshal(et.String())
-}
-
-func (et *ValueType) UnmarshalJSON(b []byte) error {
-	var s string
-	if err := json.Unmarshal(b, &s); err != nil {
 		return err
 	}
-	switch s {
-	case "<ValNone>":
-		*et = ValNone
-	case "scalar":
-		*et = ValScalar
-	case "vector":
-		*et = ValVector
-	case "matrix":
-		*et = ValMatrix
-	case "string":
-		*et = ValString
-	default:
-		return fmt.Errorf("unknown value type %q", s)
-	}
-	return nil
-}
 
-func (e ValueType) String() string {
+	ss.Metric = v.Metric
-	switch e {
+	ss.Values = v.Values
-	case ValNone:
+	ss.Histograms = v.Histograms
-		return "<ValNone>"
+
-	case ValScalar:
+	return nil
-		return "scalar"
-	case ValVector:
-		return "vector"
-	case ValMatrix:
-		return "matrix"
-	case ValString:
-		return "string"
-	}
-	panic("ValueType.String: unhandled value type")
 }
 
 // Scalar is a scalar value evaluated at the set timestamp.
@@ -324,7 +272,7 @@ func (s *Scalar) UnmarshalJSON(b []byte) error {
 
 	value, err := strconv.ParseFloat(f, 64)
 	if err != nil {
-		return fmt.Errorf("error parsing sample value: %s", err)
+		return fmt.Errorf("error parsing sample value: %w", err)
 	}
 	s.Value = SampleValue(value)
 	return nil

vendor/github.com/prometheus/common/model/value_float.go

@@ -0,0 +1,98 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"encoding/json"
+	"fmt"
+	"math"
+	"strconv"
+)
+
+// ZeroSamplePair is the pseudo zero-value of SamplePair used to signal a
+// non-existing sample pair. It is a SamplePair with timestamp Earliest and
+// value 0.0. Note that the natural zero value of SamplePair has a timestamp
+// of 0, which is possible to appear in a real SamplePair and thus not
+// suitable to signal a non-existing SamplePair.
+var ZeroSamplePair = SamplePair{Timestamp: Earliest}
+
+// A SampleValue is a representation of a value for a given sample at a given
+// time.
+type SampleValue float64
+
+// MarshalJSON implements json.Marshaler.
+func (v SampleValue) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.String())
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (v *SampleValue) UnmarshalJSON(b []byte) error {
+	if len(b) < 2 || b[0] != '"' || b[len(b)-1] != '"' {
+		return fmt.Errorf("sample value must be a quoted string")
+	}
+	f, err := strconv.ParseFloat(string(b[1:len(b)-1]), 64)
+	if err != nil {
+		return err
+	}
+	*v = SampleValue(f)
+	return nil
+}
+
+// Equal returns true if the value of v and o is equal or if both are NaN. Note
+// that v==o is false if both are NaN. If you want the conventional float
+// behavior, use == to compare two SampleValues.
+func (v SampleValue) Equal(o SampleValue) bool {
+	if v == o {
+		return true
+	}
+	return math.IsNaN(float64(v)) && math.IsNaN(float64(o))
+}
+
+func (v SampleValue) String() string {
+	return strconv.FormatFloat(float64(v), 'f', -1, 64)
+}
+
+// SamplePair pairs a SampleValue with a Timestamp.
+type SamplePair struct {
+	Timestamp Time
+	Value     SampleValue
+}
+
+func (s SamplePair) MarshalJSON() ([]byte, error) {
+	t, err := json.Marshal(s.Timestamp)
+	if err != nil {
+		return nil, err
+	}
+	v, err := json.Marshal(s.Value)
+	if err != nil {
+		return nil, err
+	}
+	return []byte(fmt.Sprintf("[%s,%s]", t, v)), nil
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (s *SamplePair) UnmarshalJSON(b []byte) error {
+	v := [...]json.Unmarshaler{&s.Timestamp, &s.Value}
+	return json.Unmarshal(b, &v)
+}
+
+// Equal returns true if this SamplePair and o have equal Values and equal
+// Timestamps. The semantics of Value equality is defined by SampleValue.Equal.
+func (s *SamplePair) Equal(o *SamplePair) bool {
+	return s == o || (s.Value.Equal(o.Value) && s.Timestamp.Equal(o.Timestamp))
+}
+
+func (s SamplePair) String() string {
+	return fmt.Sprintf("%s @[%s]", s.Value, s.Timestamp)
+}

vendor/github.com/prometheus/common/model/value_histogram.go

@@ -0,0 +1,178 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"encoding/json"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type FloatString float64
+
+func (v FloatString) String() string {
+	return strconv.FormatFloat(float64(v), 'f', -1, 64)
+}
+
+func (v FloatString) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.String())
+}
+
+func (v *FloatString) UnmarshalJSON(b []byte) error {
+	if len(b) < 2 || b[0] != '"' || b[len(b)-1] != '"' {
+		return fmt.Errorf("float value must be a quoted string")
+	}
+	f, err := strconv.ParseFloat(string(b[1:len(b)-1]), 64)
+	if err != nil {
+		return err
+	}
+	*v = FloatString(f)
+	return nil
+}
+
+type HistogramBucket struct {
+	Boundaries int32
+	Lower      FloatString
+	Upper      FloatString
+	Count      FloatString
+}
+
+func (s HistogramBucket) MarshalJSON() ([]byte, error) {
+	b, err := json.Marshal(s.Boundaries)
+	if err != nil {
+		return nil, err
+	}
+	l, err := json.Marshal(s.Lower)
+	if err != nil {
+		return nil, err
+	}
+	u, err := json.Marshal(s.Upper)
+	if err != nil {
+		return nil, err
+	}
+	c, err := json.Marshal(s.Count)
+	if err != nil {
+		return nil, err
+	}
+	return []byte(fmt.Sprintf("[%s,%s,%s,%s]", b, l, u, c)), nil
+}
+
+func (s *HistogramBucket) UnmarshalJSON(buf []byte) error {
+	tmp := []interface{}{&s.Boundaries, &s.Lower, &s.Upper, &s.Count}
+	wantLen := len(tmp)
+	if err := json.Unmarshal(buf, &tmp); err != nil {
+		return err
+	}
+	if gotLen := len(tmp); gotLen != wantLen {
+		return fmt.Errorf("wrong number of fields: %d != %d", gotLen, wantLen)
+	}
+	return nil
+}
+
+func (s *HistogramBucket) Equal(o *HistogramBucket) bool {
+	return s == o || (s.Boundaries == o.Boundaries && s.Lower == o.Lower && s.Upper == o.Upper && s.Count == o.Count)
+}
+
+func (b HistogramBucket) String() string {
+	var sb strings.Builder
+	lowerInclusive := b.Boundaries == 1 || b.Boundaries == 3
+	upperInclusive := b.Boundaries == 0 || b.Boundaries == 3
+	if lowerInclusive {
+		sb.WriteRune('[')
+	} else {
+		sb.WriteRune('(')
+	}
+	fmt.Fprintf(&sb, "%g,%g", b.Lower, b.Upper)
+	if upperInclusive {
+		sb.WriteRune(']')
+	} else {
+		sb.WriteRune(')')
+	}
+	fmt.Fprintf(&sb, ":%v", b.Count)
+	return sb.String()
+}
+
+type HistogramBuckets []*HistogramBucket
+
+func (s HistogramBuckets) Equal(o HistogramBuckets) bool {
+	if len(s) != len(o) {
+		return false
+	}
+
+	for i, bucket := range s {
+		if !bucket.Equal(o[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+type SampleHistogram struct {
+	Count   FloatString      `json:"count"`
+	Sum     FloatString      `json:"sum"`
+	Buckets HistogramBuckets `json:"buckets"`
+}
+
+func (s SampleHistogram) String() string {
+	return fmt.Sprintf("Count: %f, Sum: %f, Buckets: %v", s.Count, s.Sum, s.Buckets)
+}
+
+func (s *SampleHistogram) Equal(o *SampleHistogram) bool {
+	return s == o || (s.Count == o.Count && s.Sum == o.Sum && s.Buckets.Equal(o.Buckets))
+}
+
+type SampleHistogramPair struct {
+	Timestamp Time
+	// Histogram should never be nil, it's only stored as pointer for efficiency.
+	Histogram *SampleHistogram
+}
+
+func (s SampleHistogramPair) MarshalJSON() ([]byte, error) {
+	if s.Histogram == nil {
+		return nil, fmt.Errorf("histogram is nil")
+	}
+	t, err := json.Marshal(s.Timestamp)
+	if err != nil {
+		return nil, err
+	}
+	v, err := json.Marshal(s.Histogram)
+	if err != nil {
+		return nil, err
+	}
+	return []byte(fmt.Sprintf("[%s,%s]", t, v)), nil
+}
+
+func (s *SampleHistogramPair) UnmarshalJSON(buf []byte) error {
+	tmp := []interface{}{&s.Timestamp, &s.Histogram}
+	wantLen := len(tmp)
+	if err := json.Unmarshal(buf, &tmp); err != nil {
+		return err
+	}
+	if gotLen := len(tmp); gotLen != wantLen {
+		return fmt.Errorf("wrong number of fields: %d != %d", gotLen, wantLen)
+	}
+	if s.Histogram == nil {
+		return fmt.Errorf("histogram is null")
+	}
+	return nil
+}
+
+func (s SampleHistogramPair) String() string {
+	return fmt.Sprintf("%s @[%s]", s.Histogram, s.Timestamp)
+}
+
+func (s *SampleHistogramPair) Equal(o *SampleHistogramPair) bool {
+	return s == o || (s.Histogram.Equal(o.Histogram) && s.Timestamp.Equal(o.Timestamp))
+}

vendor/github.com/prometheus/common/model/value_type.go

@@ -0,0 +1,83 @@
+// Copyright 2013 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package model
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+// Value is a generic interface for values resulting from a query evaluation.
+type Value interface {
+	Type() ValueType
+	String() string
+}
+
+func (Matrix) Type() ValueType  { return ValMatrix }
+func (Vector) Type() ValueType  { return ValVector }
+func (*Scalar) Type() ValueType { return ValScalar }
+func (*String) Type() ValueType { return ValString }
+
+type ValueType int
+
+const (
+	ValNone ValueType = iota
+	ValScalar
+	ValVector
+	ValMatrix
+	ValString
+)
+
+// MarshalJSON implements json.Marshaler.
+func (et ValueType) MarshalJSON() ([]byte, error) {
+	return json.Marshal(et.String())
+}
+
+func (et *ValueType) UnmarshalJSON(b []byte) error {
+	var s string
+	if err := json.Unmarshal(b, &s); err != nil {
+		return err
+	}
+	switch s {
+	case "<ValNone>":
+		*et = ValNone
+	case "scalar":
+		*et = ValScalar
+	case "vector":
+		*et = ValVector
+	case "matrix":
+		*et = ValMatrix
+	case "string":
+		*et = ValString
+	default:
+		return fmt.Errorf("unknown value type %q", s)
+	}
+	return nil
+}
+
+func (e ValueType) String() string {
+	switch e {
+	case ValNone:
+		return "<ValNone>"
+	case ValScalar:
+		return "scalar"
+	case ValVector:
+		return "vector"
+	case ValMatrix:
+		return "matrix"
+	case ValString:
+		return "string"
+	}
+	panic("ValueType.String: unhandled value type")
+}

vendor/github.com/prometheus/procfs/.golangci.yml

@@ -2,6 +2,7 @@
 linters:
   enable:
   - godot
+  - misspell
   - revive
 
 linter-settings:
@@ -10,3 +11,5 @@ linter-settings:
     exclude:
     # Ignore "See: URL"
     - 'See:'
+  misspell:
+    locale: US

vendor/github.com/prometheus/procfs/Makefile.common

@@ -49,25 +49,28 @@ endif
 GOTEST := $(GO) test
 GOTEST_DIR :=
 ifneq ($(CIRCLE_JOB),)
-ifneq ($(shell which gotestsum),)
+ifneq ($(shell command -v gotestsum > /dev/null),)
 	GOTEST_DIR := test-results
 	GOTEST := gotestsum --junitfile $(GOTEST_DIR)/unit-tests.xml --
 endif
 endif
 
-PROMU_VERSION ?= 0.13.0
+PROMU_VERSION ?= 0.15.0
 PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
 
+SKIP_GOLANGCI_LINT :=
 GOLANGCI_LINT :=
 GOLANGCI_LINT_OPTS ?=
-GOLANGCI_LINT_VERSION ?= v1.45.2
+GOLANGCI_LINT_VERSION ?= v1.54.2
 # golangci-lint only supports linux, darwin and windows platforms on i386/amd64.
 # windows isn't included here because of the path separator being different.
 ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux darwin))
 	ifeq ($(GOHOSTARCH),$(filter $(GOHOSTARCH),amd64 i386))
 		# If we're in CI and there is an Actions file, that means the linter
 		# is being run in Actions, so we don't need to run it here.
-		ifeq (,$(CIRCLE_JOB))
+		ifneq (,$(SKIP_GOLANGCI_LINT))
+			GOLANGCI_LINT :=
+		else ifeq (,$(CIRCLE_JOB))
 			GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint
 		else ifeq (,$(wildcard .github/workflows/golangci-lint.yml))
 			GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint
@@ -88,6 +91,8 @@ BUILD_DOCKER_ARCHS = $(addprefix common-docker-,$(DOCKER_ARCHS))
 PUBLISH_DOCKER_ARCHS = $(addprefix common-docker-publish-,$(DOCKER_ARCHS))
 TAG_DOCKER_ARCHS = $(addprefix common-docker-tag-latest-,$(DOCKER_ARCHS))
 
+SANITIZED_DOCKER_IMAGE_TAG := $(subst +,-,$(DOCKER_IMAGE_TAG))
+
 ifeq ($(GOHOSTARCH),amd64)
         ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux freebsd darwin windows))
                 # Only supported on amd64
@@ -173,7 +178,7 @@ endif
 .PHONY: common-yamllint
 common-yamllint:
 	@echo ">> running yamllint on all YAML files in the repository"
-ifeq (, $(shell which yamllint))
+ifeq (, $(shell command -v yamllint > /dev/null))
 	@echo "yamllint not installed so skipping"
 else
 	yamllint .
@@ -202,7 +207,7 @@ common-tarball: promu
 .PHONY: common-docker $(BUILD_DOCKER_ARCHS)
 common-docker: $(BUILD_DOCKER_ARCHS)
 $(BUILD_DOCKER_ARCHS): common-docker-%:
-	docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" \
+	docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" \
 		-f $(DOCKERFILE_PATH) \
 		--build-arg ARCH="$*" \
 		--build-arg OS="linux" \
@@ -211,19 +216,19 @@ $(BUILD_DOCKER_ARCHS): common-docker-%:
 .PHONY: common-docker-publish $(PUBLISH_DOCKER_ARCHS)
 common-docker-publish: $(PUBLISH_DOCKER_ARCHS)
 $(PUBLISH_DOCKER_ARCHS): common-docker-publish-%:
-	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)"
+	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)"
 
 DOCKER_MAJOR_VERSION_TAG = $(firstword $(subst ., ,$(shell cat VERSION)))
 .PHONY: common-docker-tag-latest $(TAG_DOCKER_ARCHS)
 common-docker-tag-latest: $(TAG_DOCKER_ARCHS)
 $(TAG_DOCKER_ARCHS): common-docker-tag-latest-%:
-	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest"
+	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest"
-	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)"
+	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)"
 
 .PHONY: common-docker-manifest
 common-docker-manifest:
-	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(DOCKER_IMAGE_TAG))
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(SANITIZED_DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(SANITIZED_DOCKER_IMAGE_TAG))
-	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)"
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(SANITIZED_DOCKER_IMAGE_TAG)"
 
 .PHONY: promu
 promu: $(PROMU)

vendor/github.com/prometheus/procfs/README.md

@@ -51,11 +51,11 @@ ensure the `fixtures` directory is up to date by removing the existing directory
 extracting the ttar file using `make fixtures/.unpacked` or just `make test`.
 
 ```bash
-rm -rf fixtures
+rm -rf testdata/fixtures
 make test
 ```
 
 Next, make the required changes to the extracted files in the `fixtures` directory.  When
 the changes are complete, run `make update_fixtures` to create a new `fixtures.ttar` file
 based on the updated `fixtures` directory.  And finally, verify the changes using
-`git diff fixtures.ttar`.
+`git diff testdata/fixtures.ttar`.

vendor/github.com/prometheus/procfs/arp.go

@@ -55,7 +55,7 @@ type ARPEntry struct {
 func (fs FS) GatherARPEntries() ([]ARPEntry, error) {
 	data, err := os.ReadFile(fs.proc.Path("net/arp"))
 	if err != nil {
-		return nil, fmt.Errorf("error reading arp %q: %w", fs.proc.Path("net/arp"), err)
+		return nil, fmt.Errorf("%s: error reading arp %s: %w", ErrFileRead, fs.proc.Path("net/arp"), err)
 	}
 
 	return parseARPEntries(data)
@@ -78,11 +78,11 @@ func parseARPEntries(data []byte) ([]ARPEntry, error) {
 		} else if width == expectedDataWidth {
 			entry, err := parseARPEntry(columns)
 			if err != nil {
-				return []ARPEntry{}, fmt.Errorf("failed to parse ARP entry: %w", err)
+				return []ARPEntry{}, fmt.Errorf("%s: Failed to parse ARP entry: %v: %w", ErrFileParse, entry, err)
 			}
 			entries = append(entries, entry)
 		} else {
-			return []ARPEntry{}, fmt.Errorf("%d columns were detected, but %d were expected", width, expectedDataWidth)
+			return []ARPEntry{}, fmt.Errorf("%s: %d columns found, but expected %d: %w", ErrFileParse, width, expectedDataWidth, err)
 		}
 
 	}

vendor/github.com/prometheus/procfs/buddyinfo.go

@@ -55,7 +55,7 @@ func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) {
 		parts := strings.Fields(line)
 
 		if len(parts) < 4 {
-			return nil, fmt.Errorf("invalid number of fields when parsing buddyinfo")
+			return nil, fmt.Errorf("%w: Invalid number of fields, found: %v", ErrFileParse, parts)
 		}
 
 		node := strings.TrimRight(parts[1], ",")
@@ -66,7 +66,7 @@ func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) {
 			bucketCount = arraySize
 		} else {
 			if bucketCount != arraySize {
-				return nil, fmt.Errorf("mismatch in number of buddyinfo buckets, previous count %d, new count %d", bucketCount, arraySize)
+				return nil, fmt.Errorf("%w: mismatch in number of buddyinfo buckets, previous count %d, new count %d", ErrFileParse, bucketCount, arraySize)
 			}
 		}
 
@@ -74,7 +74,7 @@ func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) {
 		for i := 0; i < arraySize; i++ {
 			sizes[i], err = strconv.ParseFloat(parts[i+4], 64)
 			if err != nil {
-				return nil, fmt.Errorf("invalid value in buddyinfo: %w", err)
+				return nil, fmt.Errorf("%s: Invalid valid in buddyinfo: %f: %w", ErrFileParse, sizes[i], err)
 			}
 		}
 

vendor/github.com/prometheus/procfs/cpuinfo.go

@@ -79,7 +79,7 @@ func parseCPUInfoX86(info []byte) ([]CPUInfo, error) {
 	// find the first "processor" line
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
-		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
+		return nil, fmt.Errorf("%w: Cannot parse  line: %q", ErrFileParse, firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	v, err := strconv.ParseUint(field[1], 0, 32)
@@ -192,9 +192,10 @@ func parseCPUInfoARM(info []byte) ([]CPUInfo, error) {
 	scanner := bufio.NewScanner(bytes.NewReader(info))
 
 	firstLine := firstNonEmptyLine(scanner)
-	match, _ := regexp.MatchString("^[Pp]rocessor", firstLine)
+	match, err := regexp.MatchString("^[Pp]rocessor", firstLine)
 	if !match || !strings.Contains(firstLine, ":") {
-		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
+		return nil, fmt.Errorf("%s: Cannot parse line: %q: %w", ErrFileParse, firstLine, err)
+
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	cpuinfo := []CPUInfo{}
@@ -258,7 +259,7 @@ func parseCPUInfoS390X(info []byte) ([]CPUInfo, error) {
 
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "vendor_id") || !strings.Contains(firstLine, ":") {
-		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
+		return nil, fmt.Errorf("%w: Cannot parse line: %q", ErrFileParse, firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	cpuinfo := []CPUInfo{}
@@ -283,7 +284,7 @@ func parseCPUInfoS390X(info []byte) ([]CPUInfo, error) {
 		if strings.HasPrefix(line, "processor") {
 			match := cpuinfoS390XProcessorRegexp.FindStringSubmatch(line)
 			if len(match) < 2 {
-				return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
+				return nil, fmt.Errorf("%w: %q", ErrFileParse, firstLine)
 			}
 			cpu := commonCPUInfo
 			v, err := strconv.ParseUint(match[1], 0, 32)
@@ -343,7 +344,7 @@ func parseCPUInfoMips(info []byte) ([]CPUInfo, error) {
 	// find the first "processor" line
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "system type") || !strings.Contains(firstLine, ":") {
-		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
+		return nil, fmt.Errorf("%w: %q", ErrFileParse, firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	cpuinfo := []CPUInfo{}
@@ -380,12 +381,48 @@ func parseCPUInfoMips(info []byte) ([]CPUInfo, error) {
 	return cpuinfo, nil
 }
 
+func parseCPUInfoLoong(info []byte) ([]CPUInfo, error) {
+	scanner := bufio.NewScanner(bytes.NewReader(info))
+	// find the first "processor" line
+	firstLine := firstNonEmptyLine(scanner)
+	if !strings.HasPrefix(firstLine, "system type") || !strings.Contains(firstLine, ":") {
+		return nil, errors.New("invalid cpuinfo file: " + firstLine)
+	}
+	field := strings.SplitN(firstLine, ": ", 2)
+	cpuinfo := []CPUInfo{}
+	systemType := field[1]
+	i := 0
+	for scanner.Scan() {
+		line := scanner.Text()
+		if !strings.Contains(line, ":") {
+			continue
+		}
+		field := strings.SplitN(line, ": ", 2)
+		switch strings.TrimSpace(field[0]) {
+		case "processor":
+			v, err := strconv.ParseUint(field[1], 0, 32)
+			if err != nil {
+				return nil, err
+			}
+			i = int(v)
+			cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor
+			cpuinfo[i].Processor = uint(v)
+			cpuinfo[i].VendorID = systemType
+		case "CPU Family":
+			cpuinfo[i].CPUFamily = field[1]
+		case "Model Name":
+			cpuinfo[i].ModelName = field[1]
+		}
+	}
+	return cpuinfo, nil
+}
+
 func parseCPUInfoPPC(info []byte) ([]CPUInfo, error) {
 	scanner := bufio.NewScanner(bytes.NewReader(info))
 
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
-		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
+		return nil, fmt.Errorf("%w: %q", ErrFileParse, firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	v, err := strconv.ParseUint(field[1], 0, 32)
@@ -430,7 +467,7 @@ func parseCPUInfoRISCV(info []byte) ([]CPUInfo, error) {
 
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
-		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
+		return nil, fmt.Errorf("%w: %q", ErrFileParse, firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	v, err := strconv.ParseUint(field[1], 0, 32)

vendor/github.com/prometheus/procfs/cpuinfo_loong64.go

@@ -0,0 +1,19 @@
+// Copyright 2022 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build linux
+// +build linux
+
+package procfs
+
+var parseCPUInfo = parseCPUInfoLoong

vendor/github.com/prometheus/procfs/cpuinfo_others.go

@@ -11,8 +11,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build linux && !386 && !amd64 && !arm && !arm64 && !mips && !mips64 && !mips64le && !mipsle && !ppc64 && !ppc64le && !riscv64 && !s390x
+//go:build linux && !386 && !amd64 && !arm && !arm64 && !loong64 && !mips && !mips64 && !mips64le && !mipsle && !ppc64 && !ppc64le && !riscv64 && !s390x
-// +build linux,!386,!amd64,!arm,!arm64,!mips,!mips64,!mips64le,!mipsle,!ppc64,!ppc64le,!riscv64,!s390x
+// +build linux,!386,!amd64,!arm,!arm64,!loong64,!mips,!mips64,!mips64le,!mipsle,!ppc64,!ppc64le,!riscv64,!s390x
 
 package procfs
 

vendor/github.com/prometheus/procfs/crypto.go

@@ -55,12 +55,13 @@ func (fs FS) Crypto() ([]Crypto, error) {
 	path := fs.proc.Path("crypto")
 	b, err := util.ReadFileNoStat(path)
 	if err != nil {
-		return nil, fmt.Errorf("error reading crypto %q: %w", path, err)
+		return nil, fmt.Errorf("%s: Cannot read file %v: %w", ErrFileRead, b, err)
+
 	}
 
 	crypto, err := parseCrypto(bytes.NewReader(b))
 	if err != nil {
-		return nil, fmt.Errorf("error parsing crypto %q: %w", path, err)
+		return nil, fmt.Errorf("%s: Cannot parse %v: %w", ErrFileParse, crypto, err)
 	}
 
 	return crypto, nil
@@ -83,7 +84,7 @@ func parseCrypto(r io.Reader) ([]Crypto, error) {
 
 		kv := strings.Split(text, ":")
 		if len(kv) != 2 {
-			return nil, fmt.Errorf("malformed crypto line: %q", text)
+			return nil, fmt.Errorf("%w: Cannot parae line: %q", ErrFileParse, text)
 		}
 
 		k := strings.TrimSpace(kv[0])

vendor/github.com/prometheus/procfs/doc.go

@@ -16,30 +16,29 @@
 //
 // Example:
 //
-//    package main
+//	package main
 //
-//    import (
+//	import (
-//    	"fmt"
+//		"fmt"
-//    	"log"
+//		"log"
 //
-//    	"github.com/prometheus/procfs"
+//		"github.com/prometheus/procfs"
-//    )
+//	)
 //
-//    func main() {
+//	func main() {
-//    	p, err := procfs.Self()
+//		p, err := procfs.Self()
-//    	if err != nil {
+//		if err != nil {
-//    		log.Fatalf("could not get process: %s", err)
+//			log.Fatalf("could not get process: %s", err)
-//    	}
+//		}
 //
-//    	stat, err := p.Stat()
+//		stat, err := p.Stat()
-//    	if err != nil {
+//		if err != nil {
-//    		log.Fatalf("could not get process stat: %s", err)
+//			log.Fatalf("could not get process stat: %s", err)
-//    	}
+//		}
-//
-//    	fmt.Printf("command:  %s\n", stat.Comm)
-//    	fmt.Printf("cpu time: %fs\n", stat.CPUTime())
-//    	fmt.Printf("vsize:    %dB\n", stat.VirtualMemory())
-//    	fmt.Printf("rss:      %dB\n", stat.ResidentMemory())
-//    }
 //
+//		fmt.Printf("command:  %s\n", stat.Comm)
+//		fmt.Printf("cpu time: %fs\n", stat.CPUTime())
+//		fmt.Printf("vsize:    %dB\n", stat.VirtualMemory())
+//		fmt.Printf("rss:      %dB\n", stat.ResidentMemory())
+//	}
 package procfs

vendor/github.com/prometheus/procfs/fs.go

@@ -20,7 +20,8 @@ import (
 // FS represents the pseudo-filesystem sys, which provides an interface to
 // kernel data structures.
 type FS struct {
-	proc fs.FS
+	proc   fs.FS
+	isReal bool
 }
 
 // DefaultMountPoint is the common mount point of the proc filesystem.
@@ -39,5 +40,11 @@ func NewFS(mountPoint string) (FS, error) {
 	if err != nil {
 		return FS{}, err
 	}
-	return FS{fs}, nil
+
+	isReal, err := isRealProc(mountPoint)
+	if err != nil {
+		return FS{}, err
+	}
+
+	return FS{fs, isReal}, nil
 }

vendor/github.com/prometheus/procfs/fs_statfs_notype.go

@@ -0,0 +1,23 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build !freebsd && !linux
+// +build !freebsd,!linux
+
+package procfs
+
+// isRealProc returns true on architectures that don't have a Type argument
+// in their Statfs_t struct
+func isRealProc(mountPoint string) (bool, error) {
+	return true, nil
+}

vendor/github.com/prometheus/procfs/fs_statfs_type.go

@@ -0,0 +1,33 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build freebsd || linux
+// +build freebsd linux
+
+package procfs
+
+import (
+	"syscall"
+)
+
+// isRealProc determines whether supplied mountpoint is really a proc filesystem.
+func isRealProc(mountPoint string) (bool, error) {
+	stat := syscall.Statfs_t{}
+	err := syscall.Statfs(mountPoint, &stat)
+	if err != nil {
+		return false, err
+	}
+
+	// 0x9fa0 is PROC_SUPER_MAGIC: https://elixir.bootlin.com/linux/v6.1/source/include/uapi/linux/magic.h#L87
+	return stat.Type == 0x9fa0, nil
+}

vendor/github.com/prometheus/procfs/fscache.go

@@ -236,7 +236,7 @@ func (fs FS) Fscacheinfo() (Fscacheinfo, error) {
 
 	m, err := parseFscacheinfo(bytes.NewReader(b))
 	if err != nil {
-		return Fscacheinfo{}, fmt.Errorf("failed to parse Fscacheinfo: %w", err)
+		return Fscacheinfo{}, fmt.Errorf("%s: Cannot parse %v: %w", ErrFileParse, m, err)
 	}
 
 	return *m, nil
@@ -245,7 +245,7 @@ func (fs FS) Fscacheinfo() (Fscacheinfo, error) {
 func setFSCacheFields(fields []string, setFields ...*uint64) error {
 	var err error
 	if len(fields) < len(setFields) {
-		return fmt.Errorf("Insufficient number of fields, expected %v, got %v", len(setFields), len(fields))
+		return fmt.Errorf("%s: Expected %d, but got %d: %w", ErrFileParse, len(setFields), len(fields), err)
 	}
 
 	for i := range setFields {
@@ -263,7 +263,7 @@ func parseFscacheinfo(r io.Reader) (*Fscacheinfo, error) {
 	for s.Scan() {
 		fields := strings.Fields(s.Text())
 		if len(fields) < 2 {
-			return nil, fmt.Errorf("malformed Fscacheinfo line: %q", s.Text())
+			return nil, fmt.Errorf("%w: malformed Fscacheinfo line: %q", ErrFileParse, s.Text())
 		}
 
 		switch fields[0] {

vendor/github.com/prometheus/procfs/internal/util/parse.go

@@ -64,6 +64,21 @@ func ParsePInt64s(ss []string) ([]*int64, error) {
 	return us, nil
 }
 
+// Parses a uint64 from given hex in string.
+func ParseHexUint64s(ss []string) ([]*uint64, error) {
+	us := make([]*uint64, 0, len(ss))
+	for _, s := range ss {
+		u, err := strconv.ParseUint(s, 16, 64)
+		if err != nil {
+			return nil, err
+		}
+
+		us = append(us, &u)
+	}
+
+	return us, nil
+}
+
 // ReadUintFromFile reads a file and attempts to parse a uint64 from it.
 func ReadUintFromFile(path string) (uint64, error) {
 	data, err := os.ReadFile(path)

vendor/github.com/prometheus/procfs/ipvs.go

@@ -221,15 +221,16 @@ func parseIPPort(s string) (net.IP, uint16, error) {
 	case 46:
 		ip = net.ParseIP(s[1:40])
 		if ip == nil {
-			return nil, 0, fmt.Errorf("invalid IPv6 address: %s", s[1:40])
+			return nil, 0, fmt.Errorf("%s: Invalid IPv6 addr %s: %w", ErrFileParse, s[1:40], err)
 		}
 	default:
-		return nil, 0, fmt.Errorf("unexpected IP:Port: %s", s)
+		return nil, 0, fmt.Errorf("%s: Unexpected IP:Port %s: %w", ErrFileParse, s, err)
 	}
 
 	portString := s[len(s)-4:]
 	if len(portString) != 4 {
-		return nil, 0, fmt.Errorf("unexpected port string format: %s", portString)
+		return nil, 0,
+			fmt.Errorf("%s: Unexpected port string format %s: %w", ErrFileParse, portString, err)
 	}
 	port, err := strconv.ParseUint(portString, 16, 16)
 	if err != nil {

vendor/github.com/prometheus/procfs/loadavg.go

@@ -44,14 +44,14 @@ func parseLoad(loadavgBytes []byte) (*LoadAvg, error) {
 	loads := make([]float64, 3)
 	parts := strings.Fields(string(loadavgBytes))
 	if len(parts) < 3 {
-		return nil, fmt.Errorf("malformed loadavg line: too few fields in loadavg string: %q", string(loadavgBytes))
+		return nil, fmt.Errorf("%w: Malformed line %q", ErrFileParse, string(loadavgBytes))
 	}
 
 	var err error
 	for i, load := range parts[0:3] {
 		loads[i], err = strconv.ParseFloat(load, 64)
 		if err != nil {
-			return nil, fmt.Errorf("could not parse load %q: %w", load, err)
+			return nil, fmt.Errorf("%s: Cannot parse load: %f: %w", ErrFileParse, loads[i], err)
 		}
 	}
 	return &LoadAvg{

vendor/github.com/prometheus/procfs/mdstat.go

@@ -70,7 +70,7 @@ func (fs FS) MDStat() ([]MDStat, error) {
 	}
 	mdstat, err := parseMDStat(data)
 	if err != nil {
-		return nil, fmt.Errorf("error parsing mdstat %q: %w", fs.proc.Path("mdstat"), err)
+		return nil, fmt.Errorf("%s: Cannot parse %v: %w", ErrFileParse, fs.proc.Path("mdstat"), err)
 	}
 	return mdstat, nil
 }
@@ -90,13 +90,13 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 
 		deviceFields := strings.Fields(line)
 		if len(deviceFields) < 3 {
-			return nil, fmt.Errorf("not enough fields in mdline (expected at least 3): %s", line)
+			return nil, fmt.Errorf("%s: Expected 3+ lines, got %q", ErrFileParse, line)
 		}
 		mdName := deviceFields[0] // mdx
 		state := deviceFields[2]  // active or inactive
 
 		if len(lines) <= i+3 {
-			return nil, fmt.Errorf("error parsing %q: too few lines for md device", mdName)
+			return nil, fmt.Errorf("%w: Too few lines for md device: %q", ErrFileParse, mdName)
 		}
 
 		// Failed disks have the suffix (F) & Spare disks have the suffix (S).
@@ -105,7 +105,7 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 		active, total, down, size, err := evalStatusLine(lines[i], lines[i+1])
 
 		if err != nil {
-			return nil, fmt.Errorf("error parsing md device lines: %w", err)
+			return nil, fmt.Errorf("%s: Cannot parse md device lines: %v: %w", ErrFileParse, active, err)
 		}
 
 		syncLineIdx := i + 2
@@ -140,7 +140,7 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 			} else {
 				syncedBlocks, pct, finish, speed, err = evalRecoveryLine(lines[syncLineIdx])
 				if err != nil {
-					return nil, fmt.Errorf("error parsing sync line in md device %q: %w", mdName, err)
+					return nil, fmt.Errorf("%s: Cannot parse sync line in md device: %q: %w", ErrFileParse, mdName, err)
 				}
 			}
 		}
@@ -168,13 +168,13 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 func evalStatusLine(deviceLine, statusLine string) (active, total, down, size int64, err error) {
 	statusFields := strings.Fields(statusLine)
 	if len(statusFields) < 1 {
-		return 0, 0, 0, 0, fmt.Errorf("unexpected statusLine %q", statusLine)
+		return 0, 0, 0, 0, fmt.Errorf("%s: Unexpected statusline %q: %w", ErrFileParse, statusLine, err)
 	}
 
 	sizeStr := statusFields[0]
 	size, err = strconv.ParseInt(sizeStr, 10, 64)
 	if err != nil {
-		return 0, 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err)
+		return 0, 0, 0, 0, fmt.Errorf("%s: Unexpected statusline %q: %w", ErrFileParse, statusLine, err)
 	}
 
 	if strings.Contains(deviceLine, "raid0") || strings.Contains(deviceLine, "linear") {
@@ -189,17 +189,17 @@ func evalStatusLine(deviceLine, statusLine string) (active, total, down, size in
 
 	matches := statusLineRE.FindStringSubmatch(statusLine)
 	if len(matches) != 5 {
-		return 0, 0, 0, 0, fmt.Errorf("couldn't find all the substring matches: %s", statusLine)
+		return 0, 0, 0, 0, fmt.Errorf("%s: Could not fild all substring matches %s: %w", ErrFileParse, statusLine, err)
 	}
 
 	total, err = strconv.ParseInt(matches[2], 10, 64)
 	if err != nil {
-		return 0, 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err)
+		return 0, 0, 0, 0, fmt.Errorf("%s: Unexpected statusline %q: %w", ErrFileParse, statusLine, err)
 	}
 
 	active, err = strconv.ParseInt(matches[3], 10, 64)
 	if err != nil {
-		return 0, 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err)
+		return 0, 0, 0, 0, fmt.Errorf("%s: Unexpected active %d: %w", ErrFileParse, active, err)
 	}
 	down = int64(strings.Count(matches[4], "_"))
 
@@ -209,42 +209,42 @@ func evalStatusLine(deviceLine, statusLine string) (active, total, down, size in
 func evalRecoveryLine(recoveryLine string) (syncedBlocks int64, pct float64, finish float64, speed float64, err error) {
 	matches := recoveryLineBlocksRE.FindStringSubmatch(recoveryLine)
 	if len(matches) != 2 {
-		return 0, 0, 0, 0, fmt.Errorf("unexpected recoveryLine: %s", recoveryLine)
+		return 0, 0, 0, 0, fmt.Errorf("%s: Unexpected recoveryLine %s: %w", ErrFileParse, recoveryLine, err)
 	}
 
 	syncedBlocks, err = strconv.ParseInt(matches[1], 10, 64)
 	if err != nil {
-		return 0, 0, 0, 0, fmt.Errorf("error parsing int from recoveryLine %q: %w", recoveryLine, err)
+		return 0, 0, 0, 0, fmt.Errorf("%s: Unexpected parsing of recoveryLine %q: %w", ErrFileParse, recoveryLine, err)
 	}
 
 	// Get percentage complete
 	matches = recoveryLinePctRE.FindStringSubmatch(recoveryLine)
 	if len(matches) != 2 {
-		return syncedBlocks, 0, 0, 0, fmt.Errorf("unexpected recoveryLine matching percentage: %s", recoveryLine)
+		return syncedBlocks, 0, 0, 0, fmt.Errorf("%w: Unexpected recoveryLine matching percentage %s", ErrFileParse, recoveryLine)
 	}
 	pct, err = strconv.ParseFloat(strings.TrimSpace(matches[1]), 64)
 	if err != nil {
-		return syncedBlocks, 0, 0, 0, fmt.Errorf("error parsing float from recoveryLine %q: %w", recoveryLine, err)
+		return syncedBlocks, 0, 0, 0, fmt.Errorf("%w: Error parsing float from recoveryLine %q", ErrFileParse, recoveryLine)
 	}
 
 	// Get time expected left to complete
 	matches = recoveryLineFinishRE.FindStringSubmatch(recoveryLine)
 	if len(matches) != 2 {
-		return syncedBlocks, pct, 0, 0, fmt.Errorf("unexpected recoveryLine matching est. finish time: %s", recoveryLine)
+		return syncedBlocks, pct, 0, 0, fmt.Errorf("%w: Unexpected recoveryLine matching est. finish time: %s", ErrFileParse, recoveryLine)
 	}
 	finish, err = strconv.ParseFloat(matches[1], 64)
 	if err != nil {
-		return syncedBlocks, pct, 0, 0, fmt.Errorf("error parsing float from recoveryLine %q: %w", recoveryLine, err)
+		return syncedBlocks, pct, 0, 0, fmt.Errorf("%w: Unable to parse float from recoveryLine: %q", ErrFileParse, recoveryLine)
 	}
 
 	// Get recovery speed
 	matches = recoveryLineSpeedRE.FindStringSubmatch(recoveryLine)
 	if len(matches) != 2 {
-		return syncedBlocks, pct, finish, 0, fmt.Errorf("unexpected recoveryLine matching speed: %s", recoveryLine)
+		return syncedBlocks, pct, finish, 0, fmt.Errorf("%w: Unexpected recoveryLine value: %s", ErrFileParse, recoveryLine)
 	}
 	speed, err = strconv.ParseFloat(matches[1], 64)
 	if err != nil {
-		return syncedBlocks, pct, finish, 0, fmt.Errorf("error parsing float from recoveryLine %q: %w", recoveryLine, err)
+		return syncedBlocks, pct, finish, 0, fmt.Errorf("%s: Error parsing float from recoveryLine: %q: %w", ErrFileParse, recoveryLine, err)
 	}
 
 	return syncedBlocks, pct, finish, speed, nil

vendor/github.com/prometheus/procfs/meminfo.go

@@ -152,7 +152,7 @@ func (fs FS) Meminfo() (Meminfo, error) {
 
 	m, err := parseMemInfo(bytes.NewReader(b))
 	if err != nil {
-		return Meminfo{}, fmt.Errorf("failed to parse meminfo: %w", err)
+		return Meminfo{}, fmt.Errorf("%s: %w", ErrFileParse, err)
 	}
 
 	return *m, nil
@@ -165,7 +165,7 @@ func parseMemInfo(r io.Reader) (*Meminfo, error) {
 		// Each line has at least a name and value; we ignore the unit.
 		fields := strings.Fields(s.Text())
 		if len(fields) < 2 {
-			return nil, fmt.Errorf("malformed meminfo line: %q", s.Text())
+			return nil, fmt.Errorf("%w: Malformed line %q", ErrFileParse, s.Text())
 		}
 
 		v, err := strconv.ParseUint(fields[1], 0, 64)

vendor/github.com/prometheus/procfs/mountinfo.go

@@ -78,11 +78,11 @@ func parseMountInfoString(mountString string) (*MountInfo, error) {
 	mountInfo := strings.Split(mountString, " ")
 	mountInfoLength := len(mountInfo)
 	if mountInfoLength < 10 {
-		return nil, fmt.Errorf("couldn't find enough fields in mount string: %s", mountString)
+		return nil, fmt.Errorf("%w: Too few fields in mount string: %s", ErrFileParse, mountString)
 	}
 
 	if mountInfo[mountInfoLength-4] != "-" {
-		return nil, fmt.Errorf("couldn't find separator in expected field: %s", mountInfo[mountInfoLength-4])
+		return nil, fmt.Errorf("%w: couldn't find separator in expected field: %s", ErrFileParse, mountInfo[mountInfoLength-4])
 	}
 
 	mount := &MountInfo{
@@ -98,18 +98,18 @@ func parseMountInfoString(mountString string) (*MountInfo, error) {
 
 	mount.MountID, err = strconv.Atoi(mountInfo[0])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse mount ID")
+		return nil, fmt.Errorf("%w: mount ID: %q", ErrFileParse, mount.MountID)
 	}
 	mount.ParentID, err = strconv.Atoi(mountInfo[1])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse parent ID")
+		return nil, fmt.Errorf("%w: parent ID: %q", ErrFileParse, mount.ParentID)
 	}
 	// Has optional fields, which is a space separated list of values.
 	// Example: shared:2 master:7
 	if mountInfo[6] != "" {
 		mount.OptionalFields, err = mountOptionsParseOptionalFields(mountInfo[6 : mountInfoLength-4])
 		if err != nil {
-			return nil, err
+			return nil, fmt.Errorf("%s: %w", ErrFileParse, err)
 		}
 	}
 	return mount, nil

vendor/github.com/prometheus/procfs/mountstats.go

@@ -44,6 +44,14 @@ const (
 
 	fieldTransport11TCPLen = 13
 	fieldTransport11UDPLen = 10
+
+	// kernel version >= 4.14 MaxLen
+	// See: https://elixir.bootlin.com/linux/v6.4.8/source/net/sunrpc/xprtrdma/xprt_rdma.h#L393
+	fieldTransport11RDMAMaxLen = 28
+
+	// kernel version <= 4.2 MinLen
+	// See: https://elixir.bootlin.com/linux/v4.2.8/source/net/sunrpc/xprtrdma/xprt_rdma.h#L331
+	fieldTransport11RDMAMinLen = 20
 )
 
 // A Mount is a device mount parsed from /proc/[pid]/mountstats.
@@ -186,6 +194,8 @@ type NFSOperationStats struct {
 	CumulativeTotalResponseMilliseconds uint64
 	// Duration from when a request was enqueued to when it was completely handled.
 	CumulativeTotalRequestMilliseconds uint64
+	// The average time from the point the client sends RPC requests until it receives the response.
+	AverageRTTMilliseconds float64
 	// The count of operations that complete with tk_status < 0.  These statuses usually indicate error conditions.
 	Errors uint64
 }
@@ -231,6 +241,33 @@ type NFSTransportStats struct {
 	// A running counter, incremented on each request as the current size of the
 	// pending queue.
 	CumulativePendingQueue uint64
+
+	// Stats below only available with stat version 1.1.
+	// Transport over RDMA
+
+	// accessed when sending a call
+	ReadChunkCount   uint64
+	WriteChunkCount  uint64
+	ReplyChunkCount  uint64
+	TotalRdmaRequest uint64
+
+	// rarely accessed error counters
+	PullupCopyCount      uint64
+	HardwayRegisterCount uint64
+	FailedMarshalCount   uint64
+	BadReplyCount        uint64
+	MrsRecovered         uint64
+	MrsOrphaned          uint64
+	MrsAllocated         uint64
+	EmptySendctxQ        uint64
+
+	// accessed when receiving a reply
+	TotalRdmaReply    uint64
+	FixupCopyCount    uint64
+	ReplyWaitsForSend uint64
+	LocalInvNeeded    uint64
+	NomsgCallCount    uint64
+	BcallCount        uint64
 }
 
 // parseMountStats parses a /proc/[pid]/mountstats file and returns a slice
@@ -264,7 +301,7 @@ func parseMountStats(r io.Reader) ([]*Mount, error) {
 		if len(ss) > deviceEntryLen {
 			// Only NFSv3 and v4 are supported for parsing statistics
 			if m.Type != nfs3Type && m.Type != nfs4Type {
-				return nil, fmt.Errorf("cannot parse MountStats for fstype %q", m.Type)
+				return nil, fmt.Errorf("%w: Cannot parse MountStats for %q", ErrFileParse, m.Type)
 			}
 
 			statVersion := strings.TrimPrefix(ss[8], statVersionPrefix)
@@ -284,10 +321,11 @@ func parseMountStats(r io.Reader) ([]*Mount, error) {
 }
 
 // parseMount parses an entry in /proc/[pid]/mountstats in the format:
-//   device [device] mounted on [mount] with fstype [type]
+//
+//	device [device] mounted on [mount] with fstype [type]
 func parseMount(ss []string) (*Mount, error) {
 	if len(ss) < deviceEntryLen {
-		return nil, fmt.Errorf("invalid device entry: %v", ss)
+		return nil, fmt.Errorf("%w: Invalid device %q", ErrFileParse, ss)
 	}
 
 	// Check for specific words appearing at specific indices to ensure
@@ -305,7 +343,7 @@ func parseMount(ss []string) (*Mount, error) {
 
 	for _, f := range format {
 		if ss[f.i] != f.s {
-			return nil, fmt.Errorf("invalid device entry: %v", ss)
+			return nil, fmt.Errorf("%w: Invalid device %q", ErrFileParse, ss)
 		}
 	}
 
@@ -342,7 +380,7 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e
 		switch ss[0] {
 		case fieldOpts:
 			if len(ss) < 2 {
-				return nil, fmt.Errorf("not enough information for NFS stats: %v", ss)
+				return nil, fmt.Errorf("%w: Incomplete information for NFS stats: %v", ErrFileParse, ss)
 			}
 			if stats.Opts == nil {
 				stats.Opts = map[string]string{}
@@ -357,7 +395,7 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e
 			}
 		case fieldAge:
 			if len(ss) < 2 {
-				return nil, fmt.Errorf("not enough information for NFS stats: %v", ss)
+				return nil, fmt.Errorf("%w: Incomplete information for NFS stats: %v", ErrFileParse, ss)
 			}
 			// Age integer is in seconds
 			d, err := time.ParseDuration(ss[1] + "s")
@@ -368,7 +406,7 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e
 			stats.Age = d
 		case fieldBytes:
 			if len(ss) < 2 {
-				return nil, fmt.Errorf("not enough information for NFS stats: %v", ss)
+				return nil, fmt.Errorf("%w: Incomplete information for NFS stats: %v", ErrFileParse, ss)
 			}
 			bstats, err := parseNFSBytesStats(ss[1:])
 			if err != nil {
@@ -378,7 +416,7 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e
 			stats.Bytes = *bstats
 		case fieldEvents:
 			if len(ss) < 2 {
-				return nil, fmt.Errorf("not enough information for NFS stats: %v", ss)
+				return nil, fmt.Errorf("%w: Incomplete information for NFS events: %v", ErrFileParse, ss)
 			}
 			estats, err := parseNFSEventsStats(ss[1:])
 			if err != nil {
@@ -388,7 +426,7 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e
 			stats.Events = *estats
 		case fieldTransport:
 			if len(ss) < 3 {
-				return nil, fmt.Errorf("not enough information for NFS transport stats: %v", ss)
+				return nil, fmt.Errorf("%w: Incomplete information for NFS transport stats: %v", ErrFileParse, ss)
 			}
 
 			tstats, err := parseNFSTransportStats(ss[1:], statVersion)
@@ -427,7 +465,7 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e
 // integer fields.
 func parseNFSBytesStats(ss []string) (*NFSBytesStats, error) {
 	if len(ss) != fieldBytesLen {
-		return nil, fmt.Errorf("invalid NFS bytes stats: %v", ss)
+		return nil, fmt.Errorf("%w: Invalid NFS bytes stats: %v", ErrFileParse, ss)
 	}
 
 	ns := make([]uint64, 0, fieldBytesLen)
@@ -456,7 +494,7 @@ func parseNFSBytesStats(ss []string) (*NFSBytesStats, error) {
 // integer fields.
 func parseNFSEventsStats(ss []string) (*NFSEventsStats, error) {
 	if len(ss) != fieldEventsLen {
-		return nil, fmt.Errorf("invalid NFS events stats: %v", ss)
+		return nil, fmt.Errorf("%w: invalid NFS events stats: %v", ErrFileParse, ss)
 	}
 
 	ns := make([]uint64, 0, fieldEventsLen)
@@ -520,7 +558,7 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) {
 		}
 
 		if len(ss) < minFields {
-			return nil, fmt.Errorf("invalid NFS per-operations stats: %v", ss)
+			return nil, fmt.Errorf("%w: invalid NFS per-operations stats: %v", ErrFileParse, ss)
 		}
 
 		// Skip string operation name for integers
@@ -533,7 +571,6 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) {
 
 			ns = append(ns, n)
 		}
-
 		opStats := NFSOperationStats{
 			Operation:                           strings.TrimSuffix(ss[0], ":"),
 			Requests:                            ns[0],
@@ -545,6 +582,9 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) {
 			CumulativeTotalResponseMilliseconds: ns[6],
 			CumulativeTotalRequestMilliseconds:  ns[7],
 		}
+		if ns[0] != 0 {
+			opStats.AverageRTTMilliseconds = float64(ns[6]) / float64(ns[0])
+		}
 
 		if len(ns) > 8 {
 			opStats.Errors = ns[8]
@@ -571,10 +611,10 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats
 		} else if protocol == "udp" {
 			expectedLength = fieldTransport10UDPLen
 		} else {
-			return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.0 statement: %v", protocol, ss)
+			return nil, fmt.Errorf("%w: Invalid NFS protocol \"%s\" in stats 1.0 statement: %v", ErrFileParse, protocol, ss)
 		}
 		if len(ss) != expectedLength {
-			return nil, fmt.Errorf("invalid NFS transport stats 1.0 statement: %v", ss)
+			return nil, fmt.Errorf("%w: Invalid NFS transport stats 1.0 statement: %v", ErrFileParse, ss)
 		}
 	case statVersion11:
 		var expectedLength int
@@ -582,14 +622,17 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats
 			expectedLength = fieldTransport11TCPLen
 		} else if protocol == "udp" {
 			expectedLength = fieldTransport11UDPLen
+		} else if protocol == "rdma" {
+			expectedLength = fieldTransport11RDMAMinLen
 		} else {
-			return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.1 statement: %v", protocol, ss)
+			return nil, fmt.Errorf("%w: invalid NFS protocol \"%s\" in stats 1.1 statement: %v", ErrFileParse, protocol, ss)
 		}
-		if len(ss) != expectedLength {
+		if (len(ss) != expectedLength && (protocol == "tcp" || protocol == "udp")) ||
-			return nil, fmt.Errorf("invalid NFS transport stats 1.1 statement: %v", ss)
+			(protocol == "rdma" && len(ss) < expectedLength) {
+			return nil, fmt.Errorf("%w: invalid NFS transport stats 1.1 statement: %v, protocol: %v", ErrFileParse, ss, protocol)
 		}
 	default:
-		return nil, fmt.Errorf("unrecognized NFS transport stats version: %q", statVersion)
+		return nil, fmt.Errorf("%s: Unrecognized NFS transport stats version: %q, protocol: %v", ErrFileParse, statVersion, protocol)
 	}
 
 	// Allocate enough for v1.1 stats since zero value for v1.1 stats will be okay
@@ -599,7 +642,9 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats
 	// Note: slice length must be set to length of v1.1 stats to avoid a panic when
 	// only v1.0 stats are present.
 	// See: https://github.com/prometheus/node_exporter/issues/571.
-	ns := make([]uint64, fieldTransport11TCPLen)
+	//
+	// Note: NFS Over RDMA slice length is fieldTransport11RDMAMaxLen
+	ns := make([]uint64, fieldTransport11RDMAMaxLen+3)
 	for i, s := range ss {
 		n, err := strconv.ParseUint(s, 10, 64)
 		if err != nil {
@@ -617,9 +662,14 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats
 	// we set them to 0 here.
 	if protocol == "udp" {
 		ns = append(ns[:2], append(make([]uint64, 3), ns[2:]...)...)
+	} else if protocol == "tcp" {
+		ns = append(ns[:fieldTransport11TCPLen], make([]uint64, fieldTransport11RDMAMaxLen-fieldTransport11TCPLen+3)...)
+	} else if protocol == "rdma" {
+		ns = append(ns[:fieldTransport10TCPLen], append(make([]uint64, 3), ns[fieldTransport10TCPLen:]...)...)
 	}
 
 	return &NFSTransportStats{
+		// NFS xprt over tcp or udp
 		Protocol:                 protocol,
 		Port:                     ns[0],
 		Bind:                     ns[1],
@@ -631,8 +681,32 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats
 		BadTransactionIDs:        ns[7],
 		CumulativeActiveRequests: ns[8],
 		CumulativeBacklog:        ns[9],
-		MaximumRPCSlotsUsed:      ns[10],
+
-		CumulativeSendingQueue:   ns[11],
+		// NFS xprt over tcp or udp
-		CumulativePendingQueue:   ns[12],
+		// And statVersion 1.1
+		MaximumRPCSlotsUsed:    ns[10],
+		CumulativeSendingQueue: ns[11],
+		CumulativePendingQueue: ns[12],
+
+		// NFS xprt over rdma
+		// And stat Version 1.1
+		ReadChunkCount:       ns[13],
+		WriteChunkCount:      ns[14],
+		ReplyChunkCount:      ns[15],
+		TotalRdmaRequest:     ns[16],
+		PullupCopyCount:      ns[17],
+		HardwayRegisterCount: ns[18],
+		FailedMarshalCount:   ns[19],
+		BadReplyCount:        ns[20],
+		MrsRecovered:         ns[21],
+		MrsOrphaned:          ns[22],
+		MrsAllocated:         ns[23],
+		EmptySendctxQ:        ns[24],
+		TotalRdmaReply:       ns[25],
+		FixupCopyCount:       ns[26],
+		ReplyWaitsForSend:    ns[27],
+		LocalInvNeeded:       ns[28],
+		NomsgCallCount:       ns[29],
+		BcallCount:           ns[30],
 	}, nil
 }

vendor/github.com/prometheus/procfs/net_conntrackstat.go

@@ -18,7 +18,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"strconv"
 	"strings"
 
 	"github.com/prometheus/procfs/internal/util"
@@ -28,9 +27,13 @@ import (
 // and contains netfilter conntrack statistics at one CPU core.
 type ConntrackStatEntry struct {
 	Entries       uint64
+	Searched      uint64
 	Found         uint64
+	New           uint64
 	Invalid       uint64
 	Ignore        uint64
+	Delete        uint64
+	DeleteList    uint64
 	Insert        uint64
 	InsertFailed  uint64
 	Drop          uint64
@@ -55,7 +58,7 @@ func readConntrackStat(path string) ([]ConntrackStatEntry, error) {
 
 	stat, err := parseConntrackStat(bytes.NewReader(b))
 	if err != nil {
-		return nil, fmt.Errorf("failed to read conntrack stats from %q: %w", path, err)
+		return nil, fmt.Errorf("%s: Cannot read file: %v: %w", ErrFileRead, path, err)
 	}
 
 	return stat, nil
@@ -81,73 +84,35 @@ func parseConntrackStat(r io.Reader) ([]ConntrackStatEntry, error) {
 
 // Parses a ConntrackStatEntry from given array of fields.
 func parseConntrackStatEntry(fields []string) (*ConntrackStatEntry, error) {
-	if len(fields) != 17 {
+	entries, err := util.ParseHexUint64s(fields)
-		return nil, fmt.Errorf("invalid conntrackstat entry, missing fields")
-	}
-	entry := &ConntrackStatEntry{}
-
-	entries, err := parseConntrackStatField(fields[0])
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("%s: Cannot parse entry: %d: %w", ErrFileParse, entries, err)
 	}
-	entry.Entries = entries
+	numEntries := len(entries)
-
+	if numEntries < 16 || numEntries > 17 {
-	found, err := parseConntrackStatField(fields[2])
+		return nil,
-	if err != nil {
+			fmt.Errorf("%w: invalid conntrackstat entry, invalid number of fields: %d", ErrFileParse, numEntries)
-		return nil, err
 	}
-	entry.Found = found
 
-	invalid, err := parseConntrackStatField(fields[4])
+	stats := &ConntrackStatEntry{
-	if err != nil {
+		Entries:      *entries[0],
-		return nil, err
+		Searched:     *entries[1],
+		Found:        *entries[2],
+		New:          *entries[3],
+		Invalid:      *entries[4],
+		Ignore:       *entries[5],
+		Delete:       *entries[6],
+		DeleteList:   *entries[7],
+		Insert:       *entries[8],
+		InsertFailed: *entries[9],
+		Drop:         *entries[10],
+		EarlyDrop:    *entries[11],
 	}
-	entry.Invalid = invalid
 
-	ignore, err := parseConntrackStatField(fields[5])
+	// Ignore missing search_restart on Linux < 2.6.35.
-	if err != nil {
+	if numEntries == 17 {
-		return nil, err
+		stats.SearchRestart = *entries[16]
 	}
-	entry.Ignore = ignore
 
-	insert, err := parseConntrackStatField(fields[8])
+	return stats, nil
-	if err != nil {
-		return nil, err
-	}
-	entry.Insert = insert
-
-	insertFailed, err := parseConntrackStatField(fields[9])
-	if err != nil {
-		return nil, err
-	}
-	entry.InsertFailed = insertFailed
-
-	drop, err := parseConntrackStatField(fields[10])
-	if err != nil {
-		return nil, err
-	}
-	entry.Drop = drop
-
-	earlyDrop, err := parseConntrackStatField(fields[11])
-	if err != nil {
-		return nil, err
-	}
-	entry.EarlyDrop = earlyDrop
-
-	searchRestart, err := parseConntrackStatField(fields[16])
-	if err != nil {
-		return nil, err
-	}
-	entry.SearchRestart = searchRestart
-
-	return entry, nil
-}
-
-// Parses a uint64 from given hex in string.
-func parseConntrackStatField(field string) (uint64, error) {
-	val, err := strconv.ParseUint(field, 16, 64)
-	if err != nil {
-		return 0, fmt.Errorf("couldn't parse %q field: %w", field, err)
-	}
-	return val, err
 }

vendor/github.com/prometheus/procfs/net_ip_socket.go

@@ -130,7 +130,7 @@ func parseIP(hexIP string) (net.IP, error) {
 	var byteIP []byte
 	byteIP, err := hex.DecodeString(hexIP)
 	if err != nil {
-		return nil, fmt.Errorf("cannot parse address field in socket line %q", hexIP)
+		return nil, fmt.Errorf("%s: Cannot parse socket field in %q: %w", ErrFileParse, hexIP, err)
 	}
 	switch len(byteIP) {
 	case 4:
@@ -144,7 +144,7 @@ func parseIP(hexIP string) (net.IP, error) {
 		}
 		return i, nil
 	default:
-		return nil, fmt.Errorf("Unable to parse IP %s", hexIP)
+		return nil, fmt.Errorf("%s: Unable to parse IP %s: %w", ErrFileParse, hexIP, nil)
 	}
 }
 
@@ -153,7 +153,8 @@ func parseNetIPSocketLine(fields []string) (*netIPSocketLine, error) {
 	line := &netIPSocketLine{}
 	if len(fields) < 10 {
 		return nil, fmt.Errorf(
-			"cannot parse net socket line as it has less then 10 columns %q",
+			"%w: Less than 10 columns found %q",
+			ErrFileParse,
 			strings.Join(fields, " "),
 		)
 	}
@@ -162,64 +163,65 @@ func parseNetIPSocketLine(fields []string) (*netIPSocketLine, error) {
 	// sl
 	s := strings.Split(fields[0], ":")
 	if len(s) != 2 {
-		return nil, fmt.Errorf("cannot parse sl field in socket line %q", fields[0])
+		return nil, fmt.Errorf("%w: Unable to parse sl field in line %q", ErrFileParse, fields[0])
 	}
 
 	if line.Sl, err = strconv.ParseUint(s[0], 0, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse sl value in socket line: %w", err)
+		return nil, fmt.Errorf("%s: Unable to parse sl field in %q: %w", ErrFileParse, line.Sl, err)
 	}
 	// local_address
 	l := strings.Split(fields[1], ":")
 	if len(l) != 2 {
-		return nil, fmt.Errorf("cannot parse local_address field in socket line %q", fields[1])
+		return nil, fmt.Errorf("%w: Unable to parse local_address field in %q", ErrFileParse, fields[1])
 	}
 	if line.LocalAddr, err = parseIP(l[0]); err != nil {
 		return nil, err
 	}
 	if line.LocalPort, err = strconv.ParseUint(l[1], 16, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse local_address port value in socket line: %w", err)
+		return nil, fmt.Errorf("%s: Unable to parse local_address port value line %q: %w", ErrFileParse, line.LocalPort, err)
 	}
 
 	// remote_address
 	r := strings.Split(fields[2], ":")
 	if len(r) != 2 {
-		return nil, fmt.Errorf("cannot parse rem_address field in socket line %q", fields[1])
+		return nil, fmt.Errorf("%w: Unable to parse rem_address field in %q", ErrFileParse, fields[1])
 	}
 	if line.RemAddr, err = parseIP(r[0]); err != nil {
 		return nil, err
 	}
 	if line.RemPort, err = strconv.ParseUint(r[1], 16, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse rem_address port value in socket line: %w", err)
+		return nil, fmt.Errorf("%s: Cannot parse rem_address port value in %q: %w", ErrFileParse, line.RemPort, err)
 	}
 
 	// st
 	if line.St, err = strconv.ParseUint(fields[3], 16, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse st value in socket line: %w", err)
+		return nil, fmt.Errorf("%s: Cannot parse st value in %q: %w", ErrFileParse, line.St, err)
 	}
 
 	// tx_queue and rx_queue
 	q := strings.Split(fields[4], ":")
 	if len(q) != 2 {
 		return nil, fmt.Errorf(
-			"cannot parse tx/rx queues in socket line as it has a missing colon %q",
+			"%w: Missing colon for tx/rx queues in socket line %q",
+			ErrFileParse,
 			fields[4],
 		)
 	}
 	if line.TxQueue, err = strconv.ParseUint(q[0], 16, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse tx_queue value in socket line: %w", err)
+		return nil, fmt.Errorf("%s: Cannot parse tx_queue value in %q: %w", ErrFileParse, line.TxQueue, err)
 	}
 	if line.RxQueue, err = strconv.ParseUint(q[1], 16, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse rx_queue value in socket line: %w", err)
+		return nil, fmt.Errorf("%s: Cannot parse trx_queue value in %q: %w", ErrFileParse, line.RxQueue, err)
 	}
 
 	// uid
 	if line.UID, err = strconv.ParseUint(fields[7], 0, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse uid value in socket line: %w", err)
+		return nil, fmt.Errorf("%s: Cannot parse UID value in %q: %w", ErrFileParse, line.UID, err)
 	}
 
 	// inode
 	if line.Inode, err = strconv.ParseUint(fields[9], 0, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse inode value in socket line: %w", err)
+		return nil, fmt.Errorf("%s: Cannot parse inode value in %q: %w", ErrFileParse, line.Inode, err)
 	}
 
 	return line, nil

vendor/github.com/prometheus/procfs/net_protocols.go

@@ -131,7 +131,7 @@ func (ps NetProtocolStats) parseLine(rawLine string) (*NetProtocolStatLine, erro
 	} else if fields[6] == disabled {
 		line.Slab = false
 	} else {
-		return nil, fmt.Errorf("unable to parse capability for protocol: %s", line.Name)
+		return nil, fmt.Errorf("%w: capability for protocol: %s", ErrFileParse, line.Name)
 	}
 	line.ModuleName = fields[7]
 
@@ -173,7 +173,7 @@ func (pc *NetProtocolCapabilities) parseCapabilities(capabilities []string) erro
 		} else if capabilities[i] == "n" {
 			*capabilityFields[i] = false
 		} else {
-			return fmt.Errorf("unable to parse capability block for protocol: position %d", i)
+			return fmt.Errorf("%w: capability block for protocol: position %d", ErrFileParse, i)
 		}
 	}
 	return nil

vendor/github.com/prometheus/procfs/net_route.go

@@ -0,0 +1,143 @@
+// Copyright 2023 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+
+	"github.com/prometheus/procfs/internal/util"
+)
+
+const (
+	blackholeRepresentation string = "*"
+	blackholeIfaceName      string = "blackhole"
+	routeLineColumns        int    = 11
+)
+
+// A NetRouteLine represents one line from net/route.
+type NetRouteLine struct {
+	Iface       string
+	Destination uint32
+	Gateway     uint32
+	Flags       uint32
+	RefCnt      uint32
+	Use         uint32
+	Metric      uint32
+	Mask        uint32
+	MTU         uint32
+	Window      uint32
+	IRTT        uint32
+}
+
+func (fs FS) NetRoute() ([]NetRouteLine, error) {
+	return readNetRoute(fs.proc.Path("net", "route"))
+}
+
+func readNetRoute(path string) ([]NetRouteLine, error) {
+	b, err := util.ReadFileNoStat(path)
+	if err != nil {
+		return nil, err
+	}
+
+	routelines, err := parseNetRoute(bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("failed to read net route from %s: %w", path, err)
+	}
+	return routelines, nil
+}
+
+func parseNetRoute(r io.Reader) ([]NetRouteLine, error) {
+	var routelines []NetRouteLine
+
+	scanner := bufio.NewScanner(r)
+	scanner.Scan()
+	for scanner.Scan() {
+		fields := strings.Fields(scanner.Text())
+		routeline, err := parseNetRouteLine(fields)
+		if err != nil {
+			return nil, err
+		}
+		routelines = append(routelines, *routeline)
+	}
+	return routelines, nil
+}
+
+func parseNetRouteLine(fields []string) (*NetRouteLine, error) {
+	if len(fields) != routeLineColumns {
+		return nil, fmt.Errorf("invalid routeline, num of digits: %d", len(fields))
+	}
+	iface := fields[0]
+	if iface == blackholeRepresentation {
+		iface = blackholeIfaceName
+	}
+	destination, err := strconv.ParseUint(fields[1], 16, 32)
+	if err != nil {
+		return nil, err
+	}
+	gateway, err := strconv.ParseUint(fields[2], 16, 32)
+	if err != nil {
+		return nil, err
+	}
+	flags, err := strconv.ParseUint(fields[3], 10, 32)
+	if err != nil {
+		return nil, err
+	}
+	refcnt, err := strconv.ParseUint(fields[4], 10, 32)
+	if err != nil {
+		return nil, err
+	}
+	use, err := strconv.ParseUint(fields[5], 10, 32)
+	if err != nil {
+		return nil, err
+	}
+	metric, err := strconv.ParseUint(fields[6], 10, 32)
+	if err != nil {
+		return nil, err
+	}
+	mask, err := strconv.ParseUint(fields[7], 16, 32)
+	if err != nil {
+		return nil, err
+	}
+	mtu, err := strconv.ParseUint(fields[8], 10, 32)
+	if err != nil {
+		return nil, err
+	}
+	window, err := strconv.ParseUint(fields[9], 10, 32)
+	if err != nil {
+		return nil, err
+	}
+	irtt, err := strconv.ParseUint(fields[10], 10, 32)
+	if err != nil {
+		return nil, err
+	}
+	routeline := &NetRouteLine{
+		Iface:       iface,
+		Destination: uint32(destination),
+		Gateway:     uint32(gateway),
+		Flags:       uint32(flags),
+		RefCnt:      uint32(refcnt),
+		Use:         uint32(use),
+		Metric:      uint32(metric),
+		Mask:        uint32(mask),
+		MTU:         uint32(mtu),
+		Window:      uint32(window),
+		IRTT:        uint32(irtt),
+	}
+	return routeline, nil
+}

vendor/github.com/prometheus/procfs/net_sockstat.go

@@ -16,7 +16,6 @@ package procfs
 import (
 	"bufio"
 	"bytes"
-	"errors"
 	"fmt"
 	"io"
 	"strings"
@@ -70,7 +69,7 @@ func readSockstat(name string) (*NetSockstat, error) {
 
 	stat, err := parseSockstat(bytes.NewReader(b))
 	if err != nil {
-		return nil, fmt.Errorf("failed to read sockstats from %q: %w", name, err)
+		return nil, fmt.Errorf("%s: sockstats from %q: %w", ErrFileRead, name, err)
 	}
 
 	return stat, nil
@@ -84,13 +83,13 @@ func parseSockstat(r io.Reader) (*NetSockstat, error) {
 		// Expect a minimum of a protocol and one key/value pair.
 		fields := strings.Split(s.Text(), " ")
 		if len(fields) < 3 {
-			return nil, fmt.Errorf("malformed sockstat line: %q", s.Text())
+			return nil, fmt.Errorf("%w: Malformed sockstat line: %q", ErrFileParse, s.Text())
 		}
 
 		// The remaining fields are key/value pairs.
 		kvs, err := parseSockstatKVs(fields[1:])
 		if err != nil {
-			return nil, fmt.Errorf("error parsing sockstat key/value pairs from %q: %w", s.Text(), err)
+			return nil, fmt.Errorf("%s: sockstat key/value pairs from %q: %w", ErrFileParse, s.Text(), err)
 		}
 
 		// The first field is the protocol. We must trim its colon suffix.
@@ -119,7 +118,7 @@ func parseSockstat(r io.Reader) (*NetSockstat, error) {
 // parseSockstatKVs parses a string slice into a map of key/value pairs.
 func parseSockstatKVs(kvs []string) (map[string]int, error) {
 	if len(kvs)%2 != 0 {
-		return nil, errors.New("odd number of fields in key/value pairs")
+		return nil, fmt.Errorf("%w:: Odd number of fields in key/value pairs %q", ErrFileParse, kvs)
 	}
 
 	// Iterate two values at a time to gather key/value pairs.

vendor/github.com/prometheus/procfs/net_softnet.go

@@ -27,8 +27,9 @@ import (
 // For the proc file format details,
 // See:
 // * Linux 2.6.23 https://elixir.bootlin.com/linux/v2.6.23/source/net/core/dev.c#L2343
-// * Linux 4.17 https://elixir.bootlin.com/linux/v4.17/source/net/core/net-procfs.c#L162
+// * Linux 2.6.39 https://elixir.bootlin.com/linux/v2.6.39/source/net/core/dev.c#L4086
-// and https://elixir.bootlin.com/linux/v4.17/source/include/linux/netdevice.h#L2810.
+// * Linux 4.18 https://elixir.bootlin.com/linux/v4.18/source/net/core/net-procfs.c#L162
+// * Linux 5.14 https://elixir.bootlin.com/linux/v5.14/source/net/core/net-procfs.c#L169
 
 // SoftnetStat contains a single row of data from /proc/net/softnet_stat.
 type SoftnetStat struct {
@@ -38,6 +39,18 @@ type SoftnetStat struct {
 	Dropped uint32
 	// Number of times processing packets ran out of quota.
 	TimeSqueezed uint32
+	// Number of collision occur while obtaining device lock while transmitting.
+	CPUCollision uint32
+	// Number of times cpu woken up received_rps.
+	ReceivedRps uint32
+	// number of times flow limit has been reached.
+	FlowLimitCount uint32
+	// Softnet backlog status.
+	SoftnetBacklogLen uint32
+	// CPU id owning this softnet_data.
+	Index uint32
+	// softnet_data's Width.
+	Width int
 }
 
 var softNetProcFile = "net/softnet_stat"
@@ -51,7 +64,7 @@ func (fs FS) NetSoftnetStat() ([]SoftnetStat, error) {
 
 	entries, err := parseSoftnet(bytes.NewReader(b))
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse /proc/net/softnet_stat: %w", err)
+		return nil, fmt.Errorf("%s: /proc/net/softnet_stat: %w", ErrFileParse, err)
 	}
 
 	return entries, nil
@@ -63,25 +76,65 @@ func parseSoftnet(r io.Reader) ([]SoftnetStat, error) {
 	s := bufio.NewScanner(r)
 
 	var stats []SoftnetStat
+	cpuIndex := 0
 	for s.Scan() {
 		columns := strings.Fields(s.Text())
 		width := len(columns)
+		softnetStat := SoftnetStat{}
 
 		if width < minColumns {
-			return nil, fmt.Errorf("%d columns were detected, but at least %d were expected", width, minColumns)
+			return nil, fmt.Errorf("%w: detected %d columns, but expected at least %d", ErrFileParse, width, minColumns)
 		}
 
-		// We only parse the first three columns at the moment.
+		// Linux 2.6.23 https://elixir.bootlin.com/linux/v2.6.23/source/net/core/dev.c#L2347
-		us, err := parseHexUint32s(columns[0:3])
+		if width >= minColumns {
-		if err != nil {
+			us, err := parseHexUint32s(columns[0:9])
-			return nil, err
+			if err != nil {
+				return nil, err
+			}
+
+			softnetStat.Processed = us[0]
+			softnetStat.Dropped = us[1]
+			softnetStat.TimeSqueezed = us[2]
+			softnetStat.CPUCollision = us[8]
 		}
 
-		stats = append(stats, SoftnetStat{
+		// Linux 2.6.39 https://elixir.bootlin.com/linux/v2.6.39/source/net/core/dev.c#L4086
-			Processed:    us[0],
+		if width >= 10 {
-			Dropped:      us[1],
+			us, err := parseHexUint32s(columns[9:10])
-			TimeSqueezed: us[2],
+			if err != nil {
-		})
+				return nil, err
+			}
+
+			softnetStat.ReceivedRps = us[0]
+		}
+
+		// Linux 4.18 https://elixir.bootlin.com/linux/v4.18/source/net/core/net-procfs.c#L162
+		if width >= 11 {
+			us, err := parseHexUint32s(columns[10:11])
+			if err != nil {
+				return nil, err
+			}
+
+			softnetStat.FlowLimitCount = us[0]
+		}
+
+		// Linux 5.14 https://elixir.bootlin.com/linux/v5.14/source/net/core/net-procfs.c#L169
+		if width >= 13 {
+			us, err := parseHexUint32s(columns[11:13])
+			if err != nil {
+				return nil, err
+			}
+
+			softnetStat.SoftnetBacklogLen = us[0]
+			softnetStat.Index = us[1]
+		} else {
+			// For older kernels, create the Index based on the scan line number.
+			softnetStat.Index = uint32(cpuIndex)
+		}
+		softnetStat.Width = width
+		stats = append(stats, softnetStat)
+		cpuIndex++
 	}
 
 	return stats, nil

vendor/github.com/prometheus/procfs/net_unix.go

@@ -108,14 +108,14 @@ func parseNetUNIX(r io.Reader) (*NetUNIX, error) {
 		line := s.Text()
 		item, err := nu.parseLine(line, hasInode, minFields)
 		if err != nil {
-			return nil, fmt.Errorf("failed to parse /proc/net/unix data %q: %w", line, err)
+			return nil, fmt.Errorf("%s: /proc/net/unix encountered data %q: %w", ErrFileParse, line, err)
 		}
 
 		nu.Rows = append(nu.Rows, item)
 	}
 
 	if err := s.Err(); err != nil {
-		return nil, fmt.Errorf("failed to scan /proc/net/unix data: %w", err)
+		return nil, fmt.Errorf("%s: /proc/net/unix encountered data: %w", ErrFileParse, err)
 	}
 
 	return &nu, nil
@@ -126,7 +126,7 @@ func (u *NetUNIX) parseLine(line string, hasInode bool, min int) (*NetUNIXLine,
 
 	l := len(fields)
 	if l < min {
-		return nil, fmt.Errorf("expected at least %d fields but got %d", min, l)
+		return nil, fmt.Errorf("%w: expected at least %d fields but got %d", ErrFileParse, min, l)
 	}
 
 	// Field offsets are as follows:
@@ -136,29 +136,29 @@ func (u *NetUNIX) parseLine(line string, hasInode bool, min int) (*NetUNIXLine,
 
 	users, err := u.parseUsers(fields[1])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse ref count %q: %w", fields[1], err)
+		return nil, fmt.Errorf("%s: ref count %q: %w", ErrFileParse, fields[1], err)
 	}
 
 	flags, err := u.parseFlags(fields[3])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse flags %q: %w", fields[3], err)
+		return nil, fmt.Errorf("%s: Unable to parse flags %q: %w", ErrFileParse, fields[3], err)
 	}
 
 	typ, err := u.parseType(fields[4])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse type %q: %w", fields[4], err)
+		return nil, fmt.Errorf("%s: Failed to parse type %q: %w", ErrFileParse, fields[4], err)
 	}
 
 	state, err := u.parseState(fields[5])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse state %q: %w", fields[5], err)
+		return nil, fmt.Errorf("%s: Failed to parse state %q: %w", ErrFileParse, fields[5], err)
 	}
 
 	var inode uint64
 	if hasInode {
 		inode, err = u.parseInode(fields[6])
 		if err != nil {
-			return nil, fmt.Errorf("failed to parse inode %q: %w", fields[6], err)
+			return nil, fmt.Errorf("%s failed to parse inode %q: %w", ErrFileParse, fields[6], err)
 		}
 	}
 

vendor/github.com/prometheus/procfs/net_wireless.go

@@ -0,0 +1,182 @@
+// Copyright 2023 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+
+	"github.com/prometheus/procfs/internal/util"
+)
+
+// Wireless models the content of /proc/net/wireless.
+type Wireless struct {
+	Name string
+
+	// Status is the current 4-digit hex value status of the interface.
+	Status uint64
+
+	// QualityLink is the link quality.
+	QualityLink int
+
+	// QualityLevel is the signal gain (dBm).
+	QualityLevel int
+
+	// QualityNoise is the signal noise baseline (dBm).
+	QualityNoise int
+
+	// DiscardedNwid is the number of discarded packets with wrong nwid/essid.
+	DiscardedNwid int
+
+	// DiscardedCrypt is the number of discarded packets with wrong code/decode (WEP).
+	DiscardedCrypt int
+
+	// DiscardedFrag is the number of discarded packets that can't perform MAC reassembly.
+	DiscardedFrag int
+
+	// DiscardedRetry is the number of discarded packets that reached max MAC retries.
+	DiscardedRetry int
+
+	// DiscardedMisc is the number of discarded packets for other reasons.
+	DiscardedMisc int
+
+	// MissedBeacon is the number of missed beacons/superframe.
+	MissedBeacon int
+}
+
+// Wireless returns kernel wireless statistics.
+func (fs FS) Wireless() ([]*Wireless, error) {
+	b, err := util.ReadFileNoStat(fs.proc.Path("net/wireless"))
+	if err != nil {
+		return nil, err
+	}
+
+	m, err := parseWireless(bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("%s: wireless: %w", ErrFileParse, err)
+	}
+
+	return m, nil
+}
+
+// parseWireless parses the contents of /proc/net/wireless.
+/*
+Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
+face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22
+ eth1: 0000    5.  -256.  -10.       0      1      0     3      0        0
+ eth2: 0000    5.  -256.  -20.       0      2      0     4      0        0
+*/
+func parseWireless(r io.Reader) ([]*Wireless, error) {
+	var (
+		interfaces []*Wireless
+		scanner    = bufio.NewScanner(r)
+	)
+
+	for n := 0; scanner.Scan(); n++ {
+		// Skip the 2 header lines.
+		if n < 2 {
+			continue
+		}
+
+		line := scanner.Text()
+
+		parts := strings.Split(line, ":")
+		if len(parts) != 2 {
+			return nil, fmt.Errorf("%w: expected 2 parts after splitting line by ':', got %d for line %q", ErrFileParse, len(parts), line)
+		}
+
+		name := strings.TrimSpace(parts[0])
+		stats := strings.Fields(parts[1])
+
+		if len(stats) < 10 {
+			return nil, fmt.Errorf("%w: invalid number of fields in line %d, expected 10+, got %d: %q", ErrFileParse, n, len(stats), line)
+		}
+
+		status, err := strconv.ParseUint(stats[0], 16, 16)
+		if err != nil {
+			return nil, fmt.Errorf("%w: invalid status in line %d: %q", ErrFileParse, n, line)
+		}
+
+		qlink, err := strconv.Atoi(strings.TrimSuffix(stats[1], "."))
+		if err != nil {
+			return nil, fmt.Errorf("%s: parse Quality:link as integer %q: %w", ErrFileParse, qlink, err)
+		}
+
+		qlevel, err := strconv.Atoi(strings.TrimSuffix(stats[2], "."))
+		if err != nil {
+			return nil, fmt.Errorf("%s: Quality:level as integer %q: %w", ErrFileParse, qlevel, err)
+		}
+
+		qnoise, err := strconv.Atoi(strings.TrimSuffix(stats[3], "."))
+		if err != nil {
+			return nil, fmt.Errorf("%s: Quality:noise as integer %q: %w", ErrFileParse, qnoise, err)
+		}
+
+		dnwid, err := strconv.Atoi(stats[4])
+		if err != nil {
+			return nil, fmt.Errorf("%s: Discarded:nwid as integer %q: %w", ErrFileParse, dnwid, err)
+		}
+
+		dcrypt, err := strconv.Atoi(stats[5])
+		if err != nil {
+			return nil, fmt.Errorf("%s: Discarded:crypt as integer %q: %w", ErrFileParse, dcrypt, err)
+		}
+
+		dfrag, err := strconv.Atoi(stats[6])
+		if err != nil {
+			return nil, fmt.Errorf("%s: Discarded:frag as integer %q: %w", ErrFileParse, dfrag, err)
+		}
+
+		dretry, err := strconv.Atoi(stats[7])
+		if err != nil {
+			return nil, fmt.Errorf("%s: Discarded:retry as integer %q: %w", ErrFileParse, dretry, err)
+		}
+
+		dmisc, err := strconv.Atoi(stats[8])
+		if err != nil {
+			return nil, fmt.Errorf("%s: Discarded:misc as integer %q: %w", ErrFileParse, dmisc, err)
+		}
+
+		mbeacon, err := strconv.Atoi(stats[9])
+		if err != nil {
+			return nil, fmt.Errorf("%s: Missed:beacon as integer %q: %w", ErrFileParse, mbeacon, err)
+		}
+
+		w := &Wireless{
+			Name:           name,
+			Status:         status,
+			QualityLink:    qlink,
+			QualityLevel:   qlevel,
+			QualityNoise:   qnoise,
+			DiscardedNwid:  dnwid,
+			DiscardedCrypt: dcrypt,
+			DiscardedFrag:  dfrag,
+			DiscardedRetry: dretry,
+			DiscardedMisc:  dmisc,
+			MissedBeacon:   mbeacon,
+		}
+
+		interfaces = append(interfaces, w)
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("%s: Failed to scan /proc/net/wireless: %w", ErrFileRead, err)
+	}
+
+	return interfaces, nil
+}

vendor/github.com/prometheus/procfs/net_xfrm.go

@@ -115,7 +115,7 @@ func (fs FS) NewXfrmStat() (XfrmStat, error) {
 		fields := strings.Fields(s.Text())
 
 		if len(fields) != 2 {
-			return XfrmStat{}, fmt.Errorf("couldn't parse %q line %q", file.Name(), s.Text())
+			return XfrmStat{}, fmt.Errorf("%w: %q line %q", ErrFileParse, file.Name(), s.Text())
 		}
 
 		name := fields[0]

vendor/github.com/prometheus/procfs/netstat.go

@@ -37,32 +37,46 @@ func (fs FS) NetStat() ([]NetStat, error) {
 	var netStatsTotal []NetStat
 
 	for _, filePath := range statFiles {
-		file, err := os.Open(filePath)
+		procNetstat, err := parseNetstat(filePath)
 		if err != nil {
 			return nil, err
 		}
+		procNetstat.Filename = filepath.Base(filePath)
 
-		netStatFile := NetStat{
+		netStatsTotal = append(netStatsTotal, procNetstat)
-			Filename: filepath.Base(filePath),
-			Stats:    make(map[string][]uint64),
-		}
-		scanner := bufio.NewScanner(file)
-		scanner.Scan()
-		// First string is always a header for stats
-		var headers []string
-		headers = append(headers, strings.Fields(scanner.Text())...)
-
-		// Other strings represent per-CPU counters
-		for scanner.Scan() {
-			for num, counter := range strings.Fields(scanner.Text()) {
-				value, err := strconv.ParseUint(counter, 16, 64)
-				if err != nil {
-					return nil, err
-				}
-				netStatFile.Stats[headers[num]] = append(netStatFile.Stats[headers[num]], value)
-			}
-		}
-		netStatsTotal = append(netStatsTotal, netStatFile)
 	}
 	return netStatsTotal, nil
 }
+
+// parseNetstat parses the metrics from `/proc/net/stat/` file
+// and returns a NetStat structure.
+func parseNetstat(filePath string) (NetStat, error) {
+	netStat := NetStat{
+		Stats: make(map[string][]uint64),
+	}
+	file, err := os.Open(filePath)
+	if err != nil {
+		return netStat, err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	scanner.Scan()
+
+	// First string is always a header for stats
+	var headers []string
+	headers = append(headers, strings.Fields(scanner.Text())...)
+
+	// Other strings represent per-CPU counters
+	for scanner.Scan() {
+		for num, counter := range strings.Fields(scanner.Text()) {
+			value, err := strconv.ParseUint(counter, 16, 64)
+			if err != nil {
+				return NetStat{}, err
+			}
+			netStat.Stats[headers[num]] = append(netStat.Stats[headers[num]], value)
+		}
+	}
+
+	return netStat, nil
+}

vendor/github.com/prometheus/procfs/proc.go

@@ -15,13 +15,13 @@ package procfs
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"os"
 	"strconv"
 	"strings"
 
-	"github.com/prometheus/procfs/internal/fs"
 	"github.com/prometheus/procfs/internal/util"
 )
 
@@ -30,12 +30,18 @@ type Proc struct {
 	// The process ID.
 	PID int
 
-	fs fs.FS
+	fs FS
 }
 
 // Procs represents a list of Proc structs.
 type Procs []Proc
 
+var (
+	ErrFileParse  = errors.New("Error Parsing File")
+	ErrFileRead   = errors.New("Error Reading File")
+	ErrMountPoint = errors.New("Error Accessing Mount point")
+)
+
 func (p Procs) Len() int           { return len(p) }
 func (p Procs) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
 func (p Procs) Less(i, j int) bool { return p[i].PID < p[j].PID }
@@ -43,7 +49,7 @@ func (p Procs) Less(i, j int) bool { return p[i].PID < p[j].PID }
 // Self returns a process for the current process read via /proc/self.
 func Self() (Proc, error) {
 	fs, err := NewFS(DefaultMountPoint)
-	if err != nil {
+	if err != nil || errors.Unwrap(err) == ErrMountPoint {
 		return Proc{}, err
 	}
 	return fs.Self()
@@ -92,7 +98,7 @@ func (fs FS) Proc(pid int) (Proc, error) {
 	if _, err := os.Stat(fs.proc.Path(strconv.Itoa(pid))); err != nil {
 		return Proc{}, err
 	}
-	return Proc{PID: pid, fs: fs.proc}, nil
+	return Proc{PID: pid, fs: fs}, nil
 }
 
 // AllProcs returns a list of all currently available processes.
@@ -105,7 +111,7 @@ func (fs FS) AllProcs() (Procs, error) {
 
 	names, err := d.Readdirnames(-1)
 	if err != nil {
-		return Procs{}, fmt.Errorf("could not read %q: %w", d.Name(), err)
+		return Procs{}, fmt.Errorf("%s: Cannot read file: %v: %w", ErrFileRead, names, err)
 	}
 
 	p := Procs{}
@@ -114,7 +120,7 @@ func (fs FS) AllProcs() (Procs, error) {
 		if err != nil {
 			continue
 		}
-		p = append(p, Proc{PID: int(pid), fs: fs.proc})
+		p = append(p, Proc{PID: int(pid), fs: fs})
 	}
 
 	return p, nil
@@ -206,7 +212,7 @@ func (p Proc) FileDescriptors() ([]uintptr, error) {
 	for i, n := range names {
 		fd, err := strconv.ParseInt(n, 10, 32)
 		if err != nil {
-			return nil, fmt.Errorf("could not parse fd %q: %w", n, err)
+			return nil, fmt.Errorf("%s: Cannot parse line: %v: %w", ErrFileParse, i, err)
 		}
 		fds[i] = uintptr(fd)
 	}
@@ -237,6 +243,19 @@ func (p Proc) FileDescriptorTargets() ([]string, error) {
 // FileDescriptorsLen returns the number of currently open file descriptors of
 // a process.
 func (p Proc) FileDescriptorsLen() (int, error) {
+	// Use fast path if available (Linux v6.2): https://github.com/torvalds/linux/commit/f1f1f2569901
+	if p.fs.isReal {
+		stat, err := os.Stat(p.path("fd"))
+		if err != nil {
+			return 0, err
+		}
+
+		size := stat.Size()
+		if size > 0 {
+			return int(size), nil
+		}
+	}
+
 	fds, err := p.fileDescriptors()
 	if err != nil {
 		return 0, err
@@ -278,14 +297,14 @@ func (p Proc) fileDescriptors() ([]string, error) {
 
 	names, err := d.Readdirnames(-1)
 	if err != nil {
-		return nil, fmt.Errorf("could not read %q: %w", d.Name(), err)
+		return nil, fmt.Errorf("%s: Cannot read file: %v: %w", ErrFileRead, names, err)
 	}
 
 	return names, nil
 }
 
 func (p Proc) path(pa ...string) string {
-	return p.fs.Path(append([]string{strconv.Itoa(p.PID)}, pa...)...)
+	return p.fs.proc.Path(append([]string{strconv.Itoa(p.PID)}, pa...)...)
 }
 
 // FileDescriptorsInfo retrieves information about all file descriptors of

vendor/github.com/prometheus/procfs/proc_cgroup.go

@@ -23,7 +23,7 @@ import (
 	"github.com/prometheus/procfs/internal/util"
 )
 
-// Cgroup models one line from /proc/[pid]/cgroup. Each Cgroup struct describes the the placement of a PID inside a
+// Cgroup models one line from /proc/[pid]/cgroup. Each Cgroup struct describes the placement of a PID inside a
 // specific control hierarchy. The kernel has two cgroup APIs, v1 and v2. v1 has one hierarchy per available resource
 // controller, while v2 has one unified hierarchy shared by all controllers. Regardless of v1 or v2, all hierarchies
 // contain all running processes, so the question answerable with a Cgroup struct is 'where is this process in
@@ -51,7 +51,7 @@ func parseCgroupString(cgroupStr string) (*Cgroup, error) {
 
 	fields := strings.SplitN(cgroupStr, ":", 3)
 	if len(fields) < 3 {
-		return nil, fmt.Errorf("at least 3 fields required, found %d fields in cgroup string: %s", len(fields), cgroupStr)
+		return nil, fmt.Errorf("%w: 3+ fields required, found %d fields in cgroup string: %s", ErrFileParse, len(fields), cgroupStr)
 	}
 
 	cgroup := &Cgroup{
@@ -60,7 +60,7 @@ func parseCgroupString(cgroupStr string) (*Cgroup, error) {
 	}
 	cgroup.HierarchyID, err = strconv.Atoi(fields[0])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse hierarchy ID")
+		return nil, fmt.Errorf("%w: hierarchy ID: %q", ErrFileParse, cgroup.HierarchyID)
 	}
 	if fields[1] != "" {
 		ssNames := strings.Split(fields[1], ",")

vendor/github.com/prometheus/procfs/proc_cgroups.go

@@ -46,7 +46,7 @@ func parseCgroupSummaryString(CgroupSummaryStr string) (*CgroupSummary, error) {
 	fields := strings.Fields(CgroupSummaryStr)
 	// require at least 4 fields
 	if len(fields) < 4 {
-		return nil, fmt.Errorf("at least 4 fields required, found %d fields in cgroup info string: %s", len(fields), CgroupSummaryStr)
+		return nil, fmt.Errorf("%w: 4+ fields required, found %d fields in cgroup info string: %s", ErrFileParse, len(fields), CgroupSummaryStr)
 	}
 
 	CgroupSummary := &CgroupSummary{
@@ -54,15 +54,15 @@ func parseCgroupSummaryString(CgroupSummaryStr string) (*CgroupSummary, error) {
 	}
 	CgroupSummary.Hierarchy, err = strconv.Atoi(fields[1])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse hierarchy ID")
+		return nil, fmt.Errorf("%w: Unable to parse hierarchy ID from %q", ErrFileParse, fields[1])
 	}
 	CgroupSummary.Cgroups, err = strconv.Atoi(fields[2])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse Cgroup Num")
+		return nil, fmt.Errorf("%w: Unable to parse Cgroup Num from %q", ErrFileParse, fields[2])
 	}
 	CgroupSummary.Enabled, err = strconv.Atoi(fields[3])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse Enabled")
+		return nil, fmt.Errorf("%w: Unable to parse Enabled from %q", ErrFileParse, fields[3])
 	}
 	return CgroupSummary, nil
 }

vendor/github.com/prometheus/procfs/proc_fdinfo.go

@@ -26,6 +26,7 @@ var (
 	rPos          = regexp.MustCompile(`^pos:\s+(\d+)$`)
 	rFlags        = regexp.MustCompile(`^flags:\s+(\d+)$`)
 	rMntID        = regexp.MustCompile(`^mnt_id:\s+(\d+)$`)
+	rIno          = regexp.MustCompile(`^ino:\s+(\d+)$`)
 	rInotify      = regexp.MustCompile(`^inotify`)
 	rInotifyParts = regexp.MustCompile(`^inotify\s+wd:([0-9a-f]+)\s+ino:([0-9a-f]+)\s+sdev:([0-9a-f]+)(?:\s+mask:([0-9a-f]+))?`)
 )
@@ -40,6 +41,8 @@ type ProcFDInfo struct {
 	Flags string
 	// Mount point ID
 	MntID string
+	// Inode number
+	Ino string
 	// List of inotify lines (structured) in the fdinfo file (kernel 3.8+ only)
 	InotifyInfos []InotifyInfo
 }
@@ -51,7 +54,7 @@ func (p Proc) FDInfo(fd string) (*ProcFDInfo, error) {
 		return nil, err
 	}
 
-	var text, pos, flags, mntid string
+	var text, pos, flags, mntid, ino string
 	var inotify []InotifyInfo
 
 	scanner := bufio.NewScanner(bytes.NewReader(data))
@@ -63,6 +66,8 @@ func (p Proc) FDInfo(fd string) (*ProcFDInfo, error) {
 			flags = rFlags.FindStringSubmatch(text)[1]
 		} else if rMntID.MatchString(text) {
 			mntid = rMntID.FindStringSubmatch(text)[1]
+		} else if rIno.MatchString(text) {
+			ino = rIno.FindStringSubmatch(text)[1]
 		} else if rInotify.MatchString(text) {
 			newInotify, err := parseInotifyInfo(text)
 			if err != nil {
@@ -77,6 +82,7 @@ func (p Proc) FDInfo(fd string) (*ProcFDInfo, error) {
 		Pos:          pos,
 		Flags:        flags,
 		MntID:        mntid,
+		Ino:          ino,
 		InotifyInfos: inotify,
 	}
 
@@ -111,7 +117,7 @@ func parseInotifyInfo(line string) (*InotifyInfo, error) {
 		}
 		return i, nil
 	}
-	return nil, fmt.Errorf("invalid inode entry: %q", line)
+	return nil, fmt.Errorf("%w: invalid inode entry: %q", ErrFileParse, line)
 }
 
 // ProcFDInfos represents a list of ProcFDInfo structs.

vendor/github.com/prometheus/procfs/proc_interrupts.go

@@ -0,0 +1,98 @@
+// Copyright 2022 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+
+	"github.com/prometheus/procfs/internal/util"
+)
+
+// Interrupt represents a single interrupt line.
+type Interrupt struct {
+	// Info is the type of interrupt.
+	Info string
+	// Devices is the name of the device that is located at that IRQ
+	Devices string
+	// Values is the number of interrupts per CPU.
+	Values []string
+}
+
+// Interrupts models the content of /proc/interrupts. Key is the IRQ number.
+// - https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/s2-proc-interrupts
+// - https://raspberrypi.stackexchange.com/questions/105802/explanation-of-proc-interrupts-output
+type Interrupts map[string]Interrupt
+
+// Interrupts creates a new instance from a given Proc instance.
+func (p Proc) Interrupts() (Interrupts, error) {
+	data, err := util.ReadFileNoStat(p.path("interrupts"))
+	if err != nil {
+		return nil, err
+	}
+	return parseInterrupts(bytes.NewReader(data))
+}
+
+func parseInterrupts(r io.Reader) (Interrupts, error) {
+	var (
+		interrupts = Interrupts{}
+		scanner    = bufio.NewScanner(r)
+	)
+
+	if !scanner.Scan() {
+		return nil, errors.New("interrupts empty")
+	}
+	cpuNum := len(strings.Fields(scanner.Text())) // one header per cpu
+
+	for scanner.Scan() {
+		parts := strings.Fields(scanner.Text())
+		if len(parts) == 0 { // skip empty lines
+			continue
+		}
+		if len(parts) < 2 {
+			return nil, fmt.Errorf("%w: Not enough fields in interrupts (expected 2+ fields but got %d): %s", ErrFileParse, len(parts), parts)
+		}
+		intName := parts[0][:len(parts[0])-1] // remove trailing :
+
+		if len(parts) == 2 {
+			interrupts[intName] = Interrupt{
+				Info:    "",
+				Devices: "",
+				Values: []string{
+					parts[1],
+				},
+			}
+			continue
+		}
+
+		intr := Interrupt{
+			Values: parts[1 : cpuNum+1],
+		}
+
+		if _, err := strconv.Atoi(intName); err == nil { // numeral interrupt
+			intr.Info = parts[cpuNum+1]
+			intr.Devices = strings.Join(parts[cpuNum+2:], " ")
+		} else {
+			intr.Info = strings.Join(parts[cpuNum+1:], " ")
+		}
+		interrupts[intName] = intr
+	}
+
+	return interrupts, scanner.Err()
+}

vendor/github.com/prometheus/procfs/proc_limits.go

@@ -103,7 +103,7 @@ func (p Proc) Limits() (ProcLimits, error) {
 		//fields := limitsMatch.Split(s.Text(), limitsFields)
 		fields := limitsMatch.FindStringSubmatch(s.Text())
 		if len(fields) != limitsFields {
-			return ProcLimits{}, fmt.Errorf("couldn't parse %q line %q", f.Name(), s.Text())
+			return ProcLimits{}, fmt.Errorf("%w: couldn't parse %q line %q", ErrFileParse, f.Name(), s.Text())
 		}
 
 		switch fields[1] {
@@ -154,7 +154,7 @@ func parseUint(s string) (uint64, error) {
 	}
 	i, err := strconv.ParseUint(s, 10, 64)
 	if err != nil {
-		return 0, fmt.Errorf("couldn't parse value %q: %w", s, err)
+		return 0, fmt.Errorf("%s: couldn't parse value %q: %w", ErrFileParse, s, err)
 	}
 	return i, nil
 }

vendor/github.com/prometheus/procfs/proc_maps.go

@@ -63,17 +63,17 @@ type ProcMap struct {
 // parseDevice parses the device token of a line and converts it to a dev_t
 // (mkdev) like structure.
 func parseDevice(s string) (uint64, error) {
-	toks := strings.Split(s, ":")
+	i := strings.Index(s, ":")
-	if len(toks) < 2 {
+	if i == -1 {
-		return 0, fmt.Errorf("unexpected number of fields")
+		return 0, fmt.Errorf("%w: expected separator `:` in %s", ErrFileParse, s)
 	}
 
-	major, err := strconv.ParseUint(toks[0], 16, 0)
+	major, err := strconv.ParseUint(s[0:i], 16, 0)
 	if err != nil {
 		return 0, err
 	}
 
-	minor, err := strconv.ParseUint(toks[1], 16, 0)
+	minor, err := strconv.ParseUint(s[i+1:], 16, 0)
 	if err != nil {
 		return 0, err
 	}
@@ -93,17 +93,17 @@ func parseAddress(s string) (uintptr, error) {
 
 // parseAddresses parses the start-end address.
 func parseAddresses(s string) (uintptr, uintptr, error) {
-	toks := strings.Split(s, "-")
+	idx := strings.Index(s, "-")
-	if len(toks) < 2 {
+	if idx == -1 {
-		return 0, 0, fmt.Errorf("invalid address")
+		return 0, 0, fmt.Errorf("%w: expected separator `-` in %s", ErrFileParse, s)
 	}
 
-	saddr, err := parseAddress(toks[0])
+	saddr, err := parseAddress(s[0:idx])
 	if err != nil {
 		return 0, 0, err
 	}
 
-	eaddr, err := parseAddress(toks[1])
+	eaddr, err := parseAddress(s[idx+1:])
 	if err != nil {
 		return 0, 0, err
 	}
@@ -114,7 +114,7 @@ func parseAddresses(s string) (uintptr, uintptr, error) {
 // parsePermissions parses a token and returns any that are set.
 func parsePermissions(s string) (*ProcMapPermissions, error) {
 	if len(s) < 4 {
-		return nil, fmt.Errorf("invalid permissions token")
+		return nil, fmt.Errorf("%w: invalid permissions token", ErrFileParse)
 	}
 
 	perms := ProcMapPermissions{}
@@ -141,7 +141,7 @@ func parsePermissions(s string) (*ProcMapPermissions, error) {
 func parseProcMap(text string) (*ProcMap, error) {
 	fields := strings.Fields(text)
 	if len(fields) < 5 {
-		return nil, fmt.Errorf("truncated procmap entry")
+		return nil, fmt.Errorf("%w: truncated procmap entry", ErrFileParse)
 	}
 
 	saddr, eaddr, err := parseAddresses(fields[0])

vendor/github.com/prometheus/procfs/proc_netstat.go

@@ -33,139 +33,140 @@ type ProcNetstat struct {
 }
 
 type TcpExt struct { // nolint:revive
-	SyncookiesSent            float64
+	SyncookiesSent            *float64
-	SyncookiesRecv            float64
+	SyncookiesRecv            *float64
-	SyncookiesFailed          float64
+	SyncookiesFailed          *float64
-	EmbryonicRsts             float64
+	EmbryonicRsts             *float64
-	PruneCalled               float64
+	PruneCalled               *float64
-	RcvPruned                 float64
+	RcvPruned                 *float64
-	OfoPruned                 float64
+	OfoPruned                 *float64
-	OutOfWindowIcmps          float64
+	OutOfWindowIcmps          *float64
-	LockDroppedIcmps          float64
+	LockDroppedIcmps          *float64
-	ArpFilter                 float64
+	ArpFilter                 *float64
-	TW                        float64
+	TW                        *float64
-	TWRecycled                float64
+	TWRecycled                *float64
-	TWKilled                  float64
+	TWKilled                  *float64
-	PAWSActive                float64
+	PAWSActive                *float64
-	PAWSEstab                 float64
+	PAWSEstab                 *float64
-	DelayedACKs               float64
+	DelayedACKs               *float64
-	DelayedACKLocked          float64
+	DelayedACKLocked          *float64
-	DelayedACKLost            float64
+	DelayedACKLost            *float64
-	ListenOverflows           float64
+	ListenOverflows           *float64
-	ListenDrops               float64
+	ListenDrops               *float64
-	TCPHPHits                 float64
+	TCPHPHits                 *float64
-	TCPPureAcks               float64
+	TCPPureAcks               *float64
-	TCPHPAcks                 float64
+	TCPHPAcks                 *float64
-	TCPRenoRecovery           float64
+	TCPRenoRecovery           *float64
-	TCPSackRecovery           float64
+	TCPSackRecovery           *float64
-	TCPSACKReneging           float64
+	TCPSACKReneging           *float64
-	TCPSACKReorder            float64
+	TCPSACKReorder            *float64
-	TCPRenoReorder            float64
+	TCPRenoReorder            *float64
-	TCPTSReorder              float64
+	TCPTSReorder              *float64
-	TCPFullUndo               float64
+	TCPFullUndo               *float64
-	TCPPartialUndo            float64
+	TCPPartialUndo            *float64
-	TCPDSACKUndo              float64
+	TCPDSACKUndo              *float64
-	TCPLossUndo               float64
+	TCPLossUndo               *float64
-	TCPLostRetransmit         float64
+	TCPLostRetransmit         *float64
-	TCPRenoFailures           float64
+	TCPRenoFailures           *float64
-	TCPSackFailures           float64
+	TCPSackFailures           *float64
-	TCPLossFailures           float64
+	TCPLossFailures           *float64
-	TCPFastRetrans            float64
+	TCPFastRetrans            *float64
-	TCPSlowStartRetrans       float64
+	TCPSlowStartRetrans       *float64
-	TCPTimeouts               float64
+	TCPTimeouts               *float64
-	TCPLossProbes             float64
+	TCPLossProbes             *float64
-	TCPLossProbeRecovery      float64
+	TCPLossProbeRecovery      *float64
-	TCPRenoRecoveryFail       float64
+	TCPRenoRecoveryFail       *float64
-	TCPSackRecoveryFail       float64
+	TCPSackRecoveryFail       *float64
-	TCPRcvCollapsed           float64
+	TCPRcvCollapsed           *float64
-	TCPDSACKOldSent           float64
+	TCPDSACKOldSent           *float64
-	TCPDSACKOfoSent           float64
+	TCPDSACKOfoSent           *float64
-	TCPDSACKRecv              float64
+	TCPDSACKRecv              *float64
-	TCPDSACKOfoRecv           float64
+	TCPDSACKOfoRecv           *float64
-	TCPAbortOnData            float64
+	TCPAbortOnData            *float64
-	TCPAbortOnClose           float64
+	TCPAbortOnClose           *float64
-	TCPAbortOnMemory          float64
+	TCPAbortOnMemory          *float64
-	TCPAbortOnTimeout         float64
+	TCPAbortOnTimeout         *float64
-	TCPAbortOnLinger          float64
+	TCPAbortOnLinger          *float64
-	TCPAbortFailed            float64
+	TCPAbortFailed            *float64
-	TCPMemoryPressures        float64
+	TCPMemoryPressures        *float64
-	TCPMemoryPressuresChrono  float64
+	TCPMemoryPressuresChrono  *float64
-	TCPSACKDiscard            float64
+	TCPSACKDiscard            *float64
-	TCPDSACKIgnoredOld        float64
+	TCPDSACKIgnoredOld        *float64
-	TCPDSACKIgnoredNoUndo     float64
+	TCPDSACKIgnoredNoUndo     *float64
-	TCPSpuriousRTOs           float64
+	TCPSpuriousRTOs           *float64
-	TCPMD5NotFound            float64
+	TCPMD5NotFound            *float64
-	TCPMD5Unexpected          float64
+	TCPMD5Unexpected          *float64
-	TCPMD5Failure             float64
+	TCPMD5Failure             *float64
-	TCPSackShifted            float64
+	TCPSackShifted            *float64
-	TCPSackMerged             float64
+	TCPSackMerged             *float64
-	TCPSackShiftFallback      float64
+	TCPSackShiftFallback      *float64
-	TCPBacklogDrop            float64
+	TCPBacklogDrop            *float64
-	PFMemallocDrop            float64
+	PFMemallocDrop            *float64
-	TCPMinTTLDrop             float64
+	TCPMinTTLDrop             *float64
-	TCPDeferAcceptDrop        float64
+	TCPDeferAcceptDrop        *float64
-	IPReversePathFilter       float64
+	IPReversePathFilter       *float64
-	TCPTimeWaitOverflow       float64
+	TCPTimeWaitOverflow       *float64
-	TCPReqQFullDoCookies      float64
+	TCPReqQFullDoCookies      *float64
-	TCPReqQFullDrop           float64
+	TCPReqQFullDrop           *float64
-	TCPRetransFail            float64
+	TCPRetransFail            *float64
-	TCPRcvCoalesce            float64
+	TCPRcvCoalesce            *float64
-	TCPOFOQueue               float64
+	TCPRcvQDrop               *float64
-	TCPOFODrop                float64
+	TCPOFOQueue               *float64
-	TCPOFOMerge               float64
+	TCPOFODrop                *float64
-	TCPChallengeACK           float64
+	TCPOFOMerge               *float64
-	TCPSYNChallenge           float64
+	TCPChallengeACK           *float64
-	TCPFastOpenActive         float64
+	TCPSYNChallenge           *float64
-	TCPFastOpenActiveFail     float64
+	TCPFastOpenActive         *float64
-	TCPFastOpenPassive        float64
+	TCPFastOpenActiveFail     *float64
-	TCPFastOpenPassiveFail    float64
+	TCPFastOpenPassive        *float64
-	TCPFastOpenListenOverflow float64
+	TCPFastOpenPassiveFail    *float64
-	TCPFastOpenCookieReqd     float64
+	TCPFastOpenListenOverflow *float64
-	TCPFastOpenBlackhole      float64
+	TCPFastOpenCookieReqd     *float64
-	TCPSpuriousRtxHostQueues  float64
+	TCPFastOpenBlackhole      *float64
-	BusyPollRxPackets         float64
+	TCPSpuriousRtxHostQueues  *float64
-	TCPAutoCorking            float64
+	BusyPollRxPackets         *float64
-	TCPFromZeroWindowAdv      float64
+	TCPAutoCorking            *float64
-	TCPToZeroWindowAdv        float64
+	TCPFromZeroWindowAdv      *float64
-	TCPWantZeroWindowAdv      float64
+	TCPToZeroWindowAdv        *float64
-	TCPSynRetrans             float64
+	TCPWantZeroWindowAdv      *float64
-	TCPOrigDataSent           float64
+	TCPSynRetrans             *float64
-	TCPHystartTrainDetect     float64
+	TCPOrigDataSent           *float64
-	TCPHystartTrainCwnd       float64
+	TCPHystartTrainDetect     *float64
-	TCPHystartDelayDetect     float64
+	TCPHystartTrainCwnd       *float64
-	TCPHystartDelayCwnd       float64
+	TCPHystartDelayDetect     *float64
-	TCPACKSkippedSynRecv      float64
+	TCPHystartDelayCwnd       *float64
-	TCPACKSkippedPAWS         float64
+	TCPACKSkippedSynRecv      *float64
-	TCPACKSkippedSeq          float64
+	TCPACKSkippedPAWS         *float64
-	TCPACKSkippedFinWait2     float64
+	TCPACKSkippedSeq          *float64
-	TCPACKSkippedTimeWait     float64
+	TCPACKSkippedFinWait2     *float64
-	TCPACKSkippedChallenge    float64
+	TCPACKSkippedTimeWait     *float64
-	TCPWinProbe               float64
+	TCPACKSkippedChallenge    *float64
-	TCPKeepAlive              float64
+	TCPWinProbe               *float64
-	TCPMTUPFail               float64
+	TCPKeepAlive              *float64
-	TCPMTUPSuccess            float64
+	TCPMTUPFail               *float64
-	TCPWqueueTooBig           float64
+	TCPMTUPSuccess            *float64
+	TCPWqueueTooBig           *float64
 }
 
 type IpExt struct { // nolint:revive
-	InNoRoutes      float64
+	InNoRoutes      *float64
-	InTruncatedPkts float64
+	InTruncatedPkts *float64
-	InMcastPkts     float64
+	InMcastPkts     *float64
-	OutMcastPkts    float64
+	OutMcastPkts    *float64
-	InBcastPkts     float64
+	InBcastPkts     *float64
-	OutBcastPkts    float64
+	OutBcastPkts    *float64
-	InOctets        float64
+	InOctets        *float64
-	OutOctets       float64
+	OutOctets       *float64
-	InMcastOctets   float64
+	InMcastOctets   *float64
-	OutMcastOctets  float64
+	OutMcastOctets  *float64
-	InBcastOctets   float64
+	InBcastOctets   *float64
-	OutBcastOctets  float64
+	OutBcastOctets  *float64
-	InCsumErrors    float64
+	InCsumErrors    *float64
-	InNoECTPkts     float64
+	InNoECTPkts     *float64
-	InECT1Pkts      float64
+	InECT1Pkts      *float64
-	InECT0Pkts      float64
+	InECT0Pkts      *float64
-	InCEPkts        float64
+	InCEPkts        *float64
-	ReasmOverlaps   float64
+	ReasmOverlaps   *float64
 }
 
 func (p Proc) Netstat() (ProcNetstat, error) {
@@ -174,14 +175,14 @@ func (p Proc) Netstat() (ProcNetstat, error) {
 	if err != nil {
 		return ProcNetstat{PID: p.PID}, err
 	}
-	procNetstat, err := parseNetstat(bytes.NewReader(data), filename)
+	procNetstat, err := parseProcNetstat(bytes.NewReader(data), filename)
 	procNetstat.PID = p.PID
 	return procNetstat, err
 }
 
-// parseNetstat parses the metrics from proc/<pid>/net/netstat file
+// parseProcNetstat parses the metrics from proc/<pid>/net/netstat file
 // and returns a ProcNetstat structure.
-func parseNetstat(r io.Reader, fileName string) (ProcNetstat, error) {
+func parseProcNetstat(r io.Reader, fileName string) (ProcNetstat, error) {
 	var (
 		scanner     = bufio.NewScanner(r)
 		procNetstat = ProcNetstat{}
@@ -194,8 +195,8 @@ func parseNetstat(r io.Reader, fileName string) (ProcNetstat, error) {
 		// Remove trailing :.
 		protocol := strings.TrimSuffix(nameParts[0], ":")
 		if len(nameParts) != len(valueParts) {
-			return procNetstat, fmt.Errorf("mismatch field count mismatch in %s: %s",
+			return procNetstat, fmt.Errorf("%w: mismatch field count mismatch in %s: %s",
-				fileName, protocol)
+				ErrFileParse, fileName, protocol)
 		}
 		for i := 1; i < len(nameParts); i++ {
 			value, err := strconv.ParseFloat(valueParts[i], 64)
@@ -208,230 +209,232 @@ func parseNetstat(r io.Reader, fileName string) (ProcNetstat, error) {
 			case "TcpExt":
 				switch key {
 				case "SyncookiesSent":
-					procNetstat.TcpExt.SyncookiesSent = value
+					procNetstat.TcpExt.SyncookiesSent = &value
 				case "SyncookiesRecv":
-					procNetstat.TcpExt.SyncookiesRecv = value
+					procNetstat.TcpExt.SyncookiesRecv = &value
 				case "SyncookiesFailed":
-					procNetstat.TcpExt.SyncookiesFailed = value
+					procNetstat.TcpExt.SyncookiesFailed = &value
 				case "EmbryonicRsts":
-					procNetstat.TcpExt.EmbryonicRsts = value
+					procNetstat.TcpExt.EmbryonicRsts = &value
 				case "PruneCalled":
-					procNetstat.TcpExt.PruneCalled = value
+					procNetstat.TcpExt.PruneCalled = &value
 				case "RcvPruned":
-					procNetstat.TcpExt.RcvPruned = value
+					procNetstat.TcpExt.RcvPruned = &value
 				case "OfoPruned":
-					procNetstat.TcpExt.OfoPruned = value
+					procNetstat.TcpExt.OfoPruned = &value
 				case "OutOfWindowIcmps":
-					procNetstat.TcpExt.OutOfWindowIcmps = value
+					procNetstat.TcpExt.OutOfWindowIcmps = &value
 				case "LockDroppedIcmps":
-					procNetstat.TcpExt.LockDroppedIcmps = value
+					procNetstat.TcpExt.LockDroppedIcmps = &value
 				case "ArpFilter":
-					procNetstat.TcpExt.ArpFilter = value
+					procNetstat.TcpExt.ArpFilter = &value
 				case "TW":
-					procNetstat.TcpExt.TW = value
+					procNetstat.TcpExt.TW = &value
 				case "TWRecycled":
-					procNetstat.TcpExt.TWRecycled = value
+					procNetstat.TcpExt.TWRecycled = &value
 				case "TWKilled":
-					procNetstat.TcpExt.TWKilled = value
+					procNetstat.TcpExt.TWKilled = &value
 				case "PAWSActive":
-					procNetstat.TcpExt.PAWSActive = value
+					procNetstat.TcpExt.PAWSActive = &value
 				case "PAWSEstab":
-					procNetstat.TcpExt.PAWSEstab = value
+					procNetstat.TcpExt.PAWSEstab = &value
 				case "DelayedACKs":
-					procNetstat.TcpExt.DelayedACKs = value
+					procNetstat.TcpExt.DelayedACKs = &value
 				case "DelayedACKLocked":
-					procNetstat.TcpExt.DelayedACKLocked = value
+					procNetstat.TcpExt.DelayedACKLocked = &value
 				case "DelayedACKLost":
-					procNetstat.TcpExt.DelayedACKLost = value
+					procNetstat.TcpExt.DelayedACKLost = &value
 				case "ListenOverflows":
-					procNetstat.TcpExt.ListenOverflows = value
+					procNetstat.TcpExt.ListenOverflows = &value
 				case "ListenDrops":
-					procNetstat.TcpExt.ListenDrops = value
+					procNetstat.TcpExt.ListenDrops = &value
 				case "TCPHPHits":
-					procNetstat.TcpExt.TCPHPHits = value
+					procNetstat.TcpExt.TCPHPHits = &value
 				case "TCPPureAcks":
-					procNetstat.TcpExt.TCPPureAcks = value
+					procNetstat.TcpExt.TCPPureAcks = &value
 				case "TCPHPAcks":
-					procNetstat.TcpExt.TCPHPAcks = value
+					procNetstat.TcpExt.TCPHPAcks = &value
 				case "TCPRenoRecovery":
-					procNetstat.TcpExt.TCPRenoRecovery = value
+					procNetstat.TcpExt.TCPRenoRecovery = &value
 				case "TCPSackRecovery":
-					procNetstat.TcpExt.TCPSackRecovery = value
+					procNetstat.TcpExt.TCPSackRecovery = &value
 				case "TCPSACKReneging":
-					procNetstat.TcpExt.TCPSACKReneging = value
+					procNetstat.TcpExt.TCPSACKReneging = &value
 				case "TCPSACKReorder":
-					procNetstat.TcpExt.TCPSACKReorder = value
+					procNetstat.TcpExt.TCPSACKReorder = &value
 				case "TCPRenoReorder":
-					procNetstat.TcpExt.TCPRenoReorder = value
+					procNetstat.TcpExt.TCPRenoReorder = &value
 				case "TCPTSReorder":
-					procNetstat.TcpExt.TCPTSReorder = value
+					procNetstat.TcpExt.TCPTSReorder = &value
 				case "TCPFullUndo":
-					procNetstat.TcpExt.TCPFullUndo = value
+					procNetstat.TcpExt.TCPFullUndo = &value
 				case "TCPPartialUndo":
-					procNetstat.TcpExt.TCPPartialUndo = value
+					procNetstat.TcpExt.TCPPartialUndo = &value
 				case "TCPDSACKUndo":
-					procNetstat.TcpExt.TCPDSACKUndo = value
+					procNetstat.TcpExt.TCPDSACKUndo = &value
 				case "TCPLossUndo":
-					procNetstat.TcpExt.TCPLossUndo = value
+					procNetstat.TcpExt.TCPLossUndo = &value
 				case "TCPLostRetransmit":
-					procNetstat.TcpExt.TCPLostRetransmit = value
+					procNetstat.TcpExt.TCPLostRetransmit = &value
 				case "TCPRenoFailures":
-					procNetstat.TcpExt.TCPRenoFailures = value
+					procNetstat.TcpExt.TCPRenoFailures = &value
 				case "TCPSackFailures":
-					procNetstat.TcpExt.TCPSackFailures = value
+					procNetstat.TcpExt.TCPSackFailures = &value
 				case "TCPLossFailures":
-					procNetstat.TcpExt.TCPLossFailures = value
+					procNetstat.TcpExt.TCPLossFailures = &value
 				case "TCPFastRetrans":
-					procNetstat.TcpExt.TCPFastRetrans = value
+					procNetstat.TcpExt.TCPFastRetrans = &value
 				case "TCPSlowStartRetrans":
-					procNetstat.TcpExt.TCPSlowStartRetrans = value
+					procNetstat.TcpExt.TCPSlowStartRetrans = &value
 				case "TCPTimeouts":
-					procNetstat.TcpExt.TCPTimeouts = value
+					procNetstat.TcpExt.TCPTimeouts = &value
 				case "TCPLossProbes":
-					procNetstat.TcpExt.TCPLossProbes = value
+					procNetstat.TcpExt.TCPLossProbes = &value
 				case "TCPLossProbeRecovery":
-					procNetstat.TcpExt.TCPLossProbeRecovery = value
+					procNetstat.TcpExt.TCPLossProbeRecovery = &value
 				case "TCPRenoRecoveryFail":
-					procNetstat.TcpExt.TCPRenoRecoveryFail = value
+					procNetstat.TcpExt.TCPRenoRecoveryFail = &value
 				case "TCPSackRecoveryFail":
-					procNetstat.TcpExt.TCPSackRecoveryFail = value
+					procNetstat.TcpExt.TCPSackRecoveryFail = &value
 				case "TCPRcvCollapsed":
-					procNetstat.TcpExt.TCPRcvCollapsed = value
+					procNetstat.TcpExt.TCPRcvCollapsed = &value
 				case "TCPDSACKOldSent":
-					procNetstat.TcpExt.TCPDSACKOldSent = value
+					procNetstat.TcpExt.TCPDSACKOldSent = &value
 				case "TCPDSACKOfoSent":
-					procNetstat.TcpExt.TCPDSACKOfoSent = value
+					procNetstat.TcpExt.TCPDSACKOfoSent = &value
 				case "TCPDSACKRecv":
-					procNetstat.TcpExt.TCPDSACKRecv = value
+					procNetstat.TcpExt.TCPDSACKRecv = &value
 				case "TCPDSACKOfoRecv":
-					procNetstat.TcpExt.TCPDSACKOfoRecv = value
+					procNetstat.TcpExt.TCPDSACKOfoRecv = &value
 				case "TCPAbortOnData":
-					procNetstat.TcpExt.TCPAbortOnData = value
+					procNetstat.TcpExt.TCPAbortOnData = &value
 				case "TCPAbortOnClose":
-					procNetstat.TcpExt.TCPAbortOnClose = value
+					procNetstat.TcpExt.TCPAbortOnClose = &value
 				case "TCPDeferAcceptDrop":
-					procNetstat.TcpExt.TCPDeferAcceptDrop = value
+					procNetstat.TcpExt.TCPDeferAcceptDrop = &value
 				case "IPReversePathFilter":
-					procNetstat.TcpExt.IPReversePathFilter = value
+					procNetstat.TcpExt.IPReversePathFilter = &value
 				case "TCPTimeWaitOverflow":
-					procNetstat.TcpExt.TCPTimeWaitOverflow = value
+					procNetstat.TcpExt.TCPTimeWaitOverflow = &value
 				case "TCPReqQFullDoCookies":
-					procNetstat.TcpExt.TCPReqQFullDoCookies = value
+					procNetstat.TcpExt.TCPReqQFullDoCookies = &value
 				case "TCPReqQFullDrop":
-					procNetstat.TcpExt.TCPReqQFullDrop = value
+					procNetstat.TcpExt.TCPReqQFullDrop = &value
 				case "TCPRetransFail":
-					procNetstat.TcpExt.TCPRetransFail = value
+					procNetstat.TcpExt.TCPRetransFail = &value
 				case "TCPRcvCoalesce":
-					procNetstat.TcpExt.TCPRcvCoalesce = value
+					procNetstat.TcpExt.TCPRcvCoalesce = &value
+				case "TCPRcvQDrop":
+					procNetstat.TcpExt.TCPRcvQDrop = &value
 				case "TCPOFOQueue":
-					procNetstat.TcpExt.TCPOFOQueue = value
+					procNetstat.TcpExt.TCPOFOQueue = &value
 				case "TCPOFODrop":
-					procNetstat.TcpExt.TCPOFODrop = value
+					procNetstat.TcpExt.TCPOFODrop = &value
 				case "TCPOFOMerge":
-					procNetstat.TcpExt.TCPOFOMerge = value
+					procNetstat.TcpExt.TCPOFOMerge = &value
 				case "TCPChallengeACK":
-					procNetstat.TcpExt.TCPChallengeACK = value
+					procNetstat.TcpExt.TCPChallengeACK = &value
 				case "TCPSYNChallenge":
-					procNetstat.TcpExt.TCPSYNChallenge = value
+					procNetstat.TcpExt.TCPSYNChallenge = &value
 				case "TCPFastOpenActive":
-					procNetstat.TcpExt.TCPFastOpenActive = value
+					procNetstat.TcpExt.TCPFastOpenActive = &value
 				case "TCPFastOpenActiveFail":
-					procNetstat.TcpExt.TCPFastOpenActiveFail = value
+					procNetstat.TcpExt.TCPFastOpenActiveFail = &value
 				case "TCPFastOpenPassive":
-					procNetstat.TcpExt.TCPFastOpenPassive = value
+					procNetstat.TcpExt.TCPFastOpenPassive = &value
 				case "TCPFastOpenPassiveFail":
-					procNetstat.TcpExt.TCPFastOpenPassiveFail = value
+					procNetstat.TcpExt.TCPFastOpenPassiveFail = &value
 				case "TCPFastOpenListenOverflow":
-					procNetstat.TcpExt.TCPFastOpenListenOverflow = value
+					procNetstat.TcpExt.TCPFastOpenListenOverflow = &value
 				case "TCPFastOpenCookieReqd":
-					procNetstat.TcpExt.TCPFastOpenCookieReqd = value
+					procNetstat.TcpExt.TCPFastOpenCookieReqd = &value
 				case "TCPFastOpenBlackhole":
-					procNetstat.TcpExt.TCPFastOpenBlackhole = value
+					procNetstat.TcpExt.TCPFastOpenBlackhole = &value
 				case "TCPSpuriousRtxHostQueues":
-					procNetstat.TcpExt.TCPSpuriousRtxHostQueues = value
+					procNetstat.TcpExt.TCPSpuriousRtxHostQueues = &value
 				case "BusyPollRxPackets":
-					procNetstat.TcpExt.BusyPollRxPackets = value
+					procNetstat.TcpExt.BusyPollRxPackets = &value
 				case "TCPAutoCorking":
-					procNetstat.TcpExt.TCPAutoCorking = value
+					procNetstat.TcpExt.TCPAutoCorking = &value
 				case "TCPFromZeroWindowAdv":
-					procNetstat.TcpExt.TCPFromZeroWindowAdv = value
+					procNetstat.TcpExt.TCPFromZeroWindowAdv = &value
 				case "TCPToZeroWindowAdv":
-					procNetstat.TcpExt.TCPToZeroWindowAdv = value
+					procNetstat.TcpExt.TCPToZeroWindowAdv = &value
 				case "TCPWantZeroWindowAdv":
-					procNetstat.TcpExt.TCPWantZeroWindowAdv = value
+					procNetstat.TcpExt.TCPWantZeroWindowAdv = &value
 				case "TCPSynRetrans":
-					procNetstat.TcpExt.TCPSynRetrans = value
+					procNetstat.TcpExt.TCPSynRetrans = &value
 				case "TCPOrigDataSent":
-					procNetstat.TcpExt.TCPOrigDataSent = value
+					procNetstat.TcpExt.TCPOrigDataSent = &value
 				case "TCPHystartTrainDetect":
-					procNetstat.TcpExt.TCPHystartTrainDetect = value
+					procNetstat.TcpExt.TCPHystartTrainDetect = &value
 				case "TCPHystartTrainCwnd":
-					procNetstat.TcpExt.TCPHystartTrainCwnd = value
+					procNetstat.TcpExt.TCPHystartTrainCwnd = &value
 				case "TCPHystartDelayDetect":
-					procNetstat.TcpExt.TCPHystartDelayDetect = value
+					procNetstat.TcpExt.TCPHystartDelayDetect = &value
 				case "TCPHystartDelayCwnd":
-					procNetstat.TcpExt.TCPHystartDelayCwnd = value
+					procNetstat.TcpExt.TCPHystartDelayCwnd = &value
 				case "TCPACKSkippedSynRecv":
-					procNetstat.TcpExt.TCPACKSkippedSynRecv = value
+					procNetstat.TcpExt.TCPACKSkippedSynRecv = &value
 				case "TCPACKSkippedPAWS":
-					procNetstat.TcpExt.TCPACKSkippedPAWS = value
+					procNetstat.TcpExt.TCPACKSkippedPAWS = &value
 				case "TCPACKSkippedSeq":
-					procNetstat.TcpExt.TCPACKSkippedSeq = value
+					procNetstat.TcpExt.TCPACKSkippedSeq = &value
 				case "TCPACKSkippedFinWait2":
-					procNetstat.TcpExt.TCPACKSkippedFinWait2 = value
+					procNetstat.TcpExt.TCPACKSkippedFinWait2 = &value
 				case "TCPACKSkippedTimeWait":
-					procNetstat.TcpExt.TCPACKSkippedTimeWait = value
+					procNetstat.TcpExt.TCPACKSkippedTimeWait = &value
 				case "TCPACKSkippedChallenge":
-					procNetstat.TcpExt.TCPACKSkippedChallenge = value
+					procNetstat.TcpExt.TCPACKSkippedChallenge = &value
 				case "TCPWinProbe":
-					procNetstat.TcpExt.TCPWinProbe = value
+					procNetstat.TcpExt.TCPWinProbe = &value
 				case "TCPKeepAlive":
-					procNetstat.TcpExt.TCPKeepAlive = value
+					procNetstat.TcpExt.TCPKeepAlive = &value
 				case "TCPMTUPFail":
-					procNetstat.TcpExt.TCPMTUPFail = value
+					procNetstat.TcpExt.TCPMTUPFail = &value
 				case "TCPMTUPSuccess":
-					procNetstat.TcpExt.TCPMTUPSuccess = value
+					procNetstat.TcpExt.TCPMTUPSuccess = &value
 				case "TCPWqueueTooBig":
-					procNetstat.TcpExt.TCPWqueueTooBig = value
+					procNetstat.TcpExt.TCPWqueueTooBig = &value
 				}
 			case "IpExt":
 				switch key {
 				case "InNoRoutes":
-					procNetstat.IpExt.InNoRoutes = value
+					procNetstat.IpExt.InNoRoutes = &value
 				case "InTruncatedPkts":
-					procNetstat.IpExt.InTruncatedPkts = value
+					procNetstat.IpExt.InTruncatedPkts = &value
 				case "InMcastPkts":
-					procNetstat.IpExt.InMcastPkts = value
+					procNetstat.IpExt.InMcastPkts = &value
 				case "OutMcastPkts":
-					procNetstat.IpExt.OutMcastPkts = value
+					procNetstat.IpExt.OutMcastPkts = &value
 				case "InBcastPkts":
-					procNetstat.IpExt.InBcastPkts = value
+					procNetstat.IpExt.InBcastPkts = &value
 				case "OutBcastPkts":
-					procNetstat.IpExt.OutBcastPkts = value
+					procNetstat.IpExt.OutBcastPkts = &value
 				case "InOctets":
-					procNetstat.IpExt.InOctets = value
+					procNetstat.IpExt.InOctets = &value
 				case "OutOctets":
-					procNetstat.IpExt.OutOctets = value
+					procNetstat.IpExt.OutOctets = &value
 				case "InMcastOctets":
-					procNetstat.IpExt.InMcastOctets = value
+					procNetstat.IpExt.InMcastOctets = &value
 				case "OutMcastOctets":
-					procNetstat.IpExt.OutMcastOctets = value
+					procNetstat.IpExt.OutMcastOctets = &value
 				case "InBcastOctets":
-					procNetstat.IpExt.InBcastOctets = value
+					procNetstat.IpExt.InBcastOctets = &value
 				case "OutBcastOctets":
-					procNetstat.IpExt.OutBcastOctets = value
+					procNetstat.IpExt.OutBcastOctets = &value
 				case "InCsumErrors":
-					procNetstat.IpExt.InCsumErrors = value
+					procNetstat.IpExt.InCsumErrors = &value
 				case "InNoECTPkts":
-					procNetstat.IpExt.InNoECTPkts = value
+					procNetstat.IpExt.InNoECTPkts = &value
 				case "InECT1Pkts":
-					procNetstat.IpExt.InECT1Pkts = value
+					procNetstat.IpExt.InECT1Pkts = &value
 				case "InECT0Pkts":
-					procNetstat.IpExt.InECT0Pkts = value
+					procNetstat.IpExt.InECT0Pkts = &value
 				case "InCEPkts":
-					procNetstat.IpExt.InCEPkts = value
+					procNetstat.IpExt.InCEPkts = &value
 				case "ReasmOverlaps":
-					procNetstat.IpExt.ReasmOverlaps = value
+					procNetstat.IpExt.ReasmOverlaps = &value
 				}
 			}
 		}

vendor/github.com/prometheus/procfs/proc_ns.go

@@ -40,7 +40,7 @@ func (p Proc) Namespaces() (Namespaces, error) {
 
 	names, err := d.Readdirnames(-1)
 	if err != nil {
-		return nil, fmt.Errorf("failed to read contents of ns dir: %w", err)
+		return nil, fmt.Errorf("%s: failed to read contents of ns dir: %w", ErrFileRead, err)
 	}
 
 	ns := make(Namespaces, len(names))
@@ -52,13 +52,13 @@ func (p Proc) Namespaces() (Namespaces, error) {
 
 		fields := strings.SplitN(target, ":", 2)
 		if len(fields) != 2 {
-			return nil, fmt.Errorf("failed to parse namespace type and inode from %q", target)
+			return nil, fmt.Errorf("%w: namespace type and inode from %q", ErrFileParse, target)
 		}
 
 		typ := fields[0]
 		inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32)
 		if err != nil {
-			return nil, fmt.Errorf("failed to parse inode from %q: %w", fields[1], err)
+			return nil, fmt.Errorf("%s: inode from %q: %w", ErrFileParse, fields[1], err)
 		}
 
 		ns[name] = Namespace{typ, uint32(inode)}

vendor/github.com/prometheus/procfs/proc_psi.go

@@ -61,14 +61,14 @@ type PSIStats struct {
 func (fs FS) PSIStatsForResource(resource string) (PSIStats, error) {
 	data, err := util.ReadFileNoStat(fs.proc.Path(fmt.Sprintf("%s/%s", "pressure", resource)))
 	if err != nil {
-		return PSIStats{}, fmt.Errorf("psi_stats: unavailable for %q: %w", resource, err)
+		return PSIStats{}, fmt.Errorf("%s: psi_stats: unavailable for %q: %w", ErrFileRead, resource, err)
 	}
 
-	return parsePSIStats(resource, bytes.NewReader(data))
+	return parsePSIStats(bytes.NewReader(data))
 }
 
 // parsePSIStats parses the specified file for pressure stall information.
-func parsePSIStats(resource string, r io.Reader) (PSIStats, error) {
+func parsePSIStats(r io.Reader) (PSIStats, error) {
 	psiStats := PSIStats{}
 
 	scanner := bufio.NewScanner(r)

vendor/github.com/prometheus/procfs/proc_smaps.go

@@ -135,12 +135,12 @@ func (s *ProcSMapsRollup) parseLine(line string) error {
 	}
 	vBytes := vKBytes * 1024
 
-	s.addValue(k, v, vKBytes, vBytes)
+	s.addValue(k, vBytes)
 
 	return nil
 }
 
-func (s *ProcSMapsRollup) addValue(k string, vString string, vUint uint64, vUintBytes uint64) {
+func (s *ProcSMapsRollup) addValue(k string, vUintBytes uint64) {
 	switch k {
 	case "Rss":
 		s.Rss += vUintBytes

vendor/github.com/prometheus/procfs/proc_snmp.go

@@ -37,100 +37,100 @@ type ProcSnmp struct {
 }
 
 type Ip struct { // nolint:revive
-	Forwarding      float64
+	Forwarding      *float64
-	DefaultTTL      float64
+	DefaultTTL      *float64
-	InReceives      float64
+	InReceives      *float64
-	InHdrErrors     float64
+	InHdrErrors     *float64
-	InAddrErrors    float64
+	InAddrErrors    *float64
-	ForwDatagrams   float64
+	ForwDatagrams   *float64
-	InUnknownProtos float64
+	InUnknownProtos *float64
-	InDiscards      float64
+	InDiscards      *float64
-	InDelivers      float64
+	InDelivers      *float64
-	OutRequests     float64
+	OutRequests     *float64
-	OutDiscards     float64
+	OutDiscards     *float64
-	OutNoRoutes     float64
+	OutNoRoutes     *float64
-	ReasmTimeout    float64
+	ReasmTimeout    *float64
-	ReasmReqds      float64
+	ReasmReqds      *float64
-	ReasmOKs        float64
+	ReasmOKs        *float64
-	ReasmFails      float64
+	ReasmFails      *float64
-	FragOKs         float64
+	FragOKs         *float64
-	FragFails       float64
+	FragFails       *float64
-	FragCreates     float64
+	FragCreates     *float64
 }
 
-type Icmp struct {
+type Icmp struct { // nolint:revive
-	InMsgs           float64
+	InMsgs           *float64
-	InErrors         float64
+	InErrors         *float64
-	InCsumErrors     float64
+	InCsumErrors     *float64
-	InDestUnreachs   float64
+	InDestUnreachs   *float64
-	InTimeExcds      float64
+	InTimeExcds      *float64
-	InParmProbs      float64
+	InParmProbs      *float64
-	InSrcQuenchs     float64
+	InSrcQuenchs     *float64
-	InRedirects      float64
+	InRedirects      *float64
-	InEchos          float64
+	InEchos          *float64
-	InEchoReps       float64
+	InEchoReps       *float64
-	InTimestamps     float64
+	InTimestamps     *float64
-	InTimestampReps  float64
+	InTimestampReps  *float64
-	InAddrMasks      float64
+	InAddrMasks      *float64
-	InAddrMaskReps   float64
+	InAddrMaskReps   *float64
-	OutMsgs          float64
+	OutMsgs          *float64
-	OutErrors        float64
+	OutErrors        *float64
-	OutDestUnreachs  float64
+	OutDestUnreachs  *float64
-	OutTimeExcds     float64
+	OutTimeExcds     *float64
-	OutParmProbs     float64
+	OutParmProbs     *float64
-	OutSrcQuenchs    float64
+	OutSrcQuenchs    *float64
-	OutRedirects     float64
+	OutRedirects     *float64
-	OutEchos         float64
+	OutEchos         *float64
-	OutEchoReps      float64
+	OutEchoReps      *float64
-	OutTimestamps    float64
+	OutTimestamps    *float64
-	OutTimestampReps float64
+	OutTimestampReps *float64
-	OutAddrMasks     float64
+	OutAddrMasks     *float64
-	OutAddrMaskReps  float64
+	OutAddrMaskReps  *float64
 }
 
 type IcmpMsg struct {
-	InType3  float64
+	InType3  *float64
-	OutType3 float64
+	OutType3 *float64
 }
 
 type Tcp struct { // nolint:revive
-	RtoAlgorithm float64
+	RtoAlgorithm *float64
-	RtoMin       float64
+	RtoMin       *float64
-	RtoMax       float64
+	RtoMax       *float64
-	MaxConn      float64
+	MaxConn      *float64
-	ActiveOpens  float64
+	ActiveOpens  *float64
-	PassiveOpens float64
+	PassiveOpens *float64
-	AttemptFails float64
+	AttemptFails *float64
-	EstabResets  float64
+	EstabResets  *float64
-	CurrEstab    float64
+	CurrEstab    *float64
-	InSegs       float64
+	InSegs       *float64
-	OutSegs      float64
+	OutSegs      *float64
-	RetransSegs  float64
+	RetransSegs  *float64
-	InErrs       float64
+	InErrs       *float64
-	OutRsts      float64
+	OutRsts      *float64
-	InCsumErrors float64
+	InCsumErrors *float64
 }
 
 type Udp struct { // nolint:revive
-	InDatagrams  float64
+	InDatagrams  *float64
-	NoPorts      float64
+	NoPorts      *float64
-	InErrors     float64
+	InErrors     *float64
-	OutDatagrams float64
+	OutDatagrams *float64
-	RcvbufErrors float64
+	RcvbufErrors *float64
-	SndbufErrors float64
+	SndbufErrors *float64
-	InCsumErrors float64
+	InCsumErrors *float64
-	IgnoredMulti float64
+	IgnoredMulti *float64
 }
 
 type UdpLite struct { // nolint:revive
-	InDatagrams  float64
+	InDatagrams  *float64
-	NoPorts      float64
+	NoPorts      *float64
-	InErrors     float64
+	InErrors     *float64
-	OutDatagrams float64
+	OutDatagrams *float64
-	RcvbufErrors float64
+	RcvbufErrors *float64
-	SndbufErrors float64
+	SndbufErrors *float64
-	InCsumErrors float64
+	InCsumErrors *float64
-	IgnoredMulti float64
+	IgnoredMulti *float64
 }
 
 func (p Proc) Snmp() (ProcSnmp, error) {
@@ -159,8 +159,8 @@ func parseSnmp(r io.Reader, fileName string) (ProcSnmp, error) {
 		// Remove trailing :.
 		protocol := strings.TrimSuffix(nameParts[0], ":")
 		if len(nameParts) != len(valueParts) {
-			return procSnmp, fmt.Errorf("mismatch field count mismatch in %s: %s",
+			return procSnmp, fmt.Errorf("%w: mismatch field count mismatch in %s: %s",
-				fileName, protocol)
+				ErrFileParse, fileName, protocol)
 		}
 		for i := 1; i < len(nameParts); i++ {
 			value, err := strconv.ParseFloat(valueParts[i], 64)
@@ -173,178 +173,178 @@ func parseSnmp(r io.Reader, fileName string) (ProcSnmp, error) {
 			case "Ip":
 				switch key {
 				case "Forwarding":
-					procSnmp.Ip.Forwarding = value
+					procSnmp.Ip.Forwarding = &value
 				case "DefaultTTL":
-					procSnmp.Ip.DefaultTTL = value
+					procSnmp.Ip.DefaultTTL = &value
 				case "InReceives":
-					procSnmp.Ip.InReceives = value
+					procSnmp.Ip.InReceives = &value
 				case "InHdrErrors":
-					procSnmp.Ip.InHdrErrors = value
+					procSnmp.Ip.InHdrErrors = &value
 				case "InAddrErrors":
-					procSnmp.Ip.InAddrErrors = value
+					procSnmp.Ip.InAddrErrors = &value
 				case "ForwDatagrams":
-					procSnmp.Ip.ForwDatagrams = value
+					procSnmp.Ip.ForwDatagrams = &value
 				case "InUnknownProtos":
-					procSnmp.Ip.InUnknownProtos = value
+					procSnmp.Ip.InUnknownProtos = &value
 				case "InDiscards":
-					procSnmp.Ip.InDiscards = value
+					procSnmp.Ip.InDiscards = &value
 				case "InDelivers":
-					procSnmp.Ip.InDelivers = value
+					procSnmp.Ip.InDelivers = &value
 				case "OutRequests":
-					procSnmp.Ip.OutRequests = value
+					procSnmp.Ip.OutRequests = &value
 				case "OutDiscards":
-					procSnmp.Ip.OutDiscards = value
+					procSnmp.Ip.OutDiscards = &value
 				case "OutNoRoutes":
-					procSnmp.Ip.OutNoRoutes = value
+					procSnmp.Ip.OutNoRoutes = &value
 				case "ReasmTimeout":
-					procSnmp.Ip.ReasmTimeout = value
+					procSnmp.Ip.ReasmTimeout = &value
 				case "ReasmReqds":
-					procSnmp.Ip.ReasmReqds = value
+					procSnmp.Ip.ReasmReqds = &value
 				case "ReasmOKs":
-					procSnmp.Ip.ReasmOKs = value
+					procSnmp.Ip.ReasmOKs = &value
 				case "ReasmFails":
-					procSnmp.Ip.ReasmFails = value
+					procSnmp.Ip.ReasmFails = &value
 				case "FragOKs":
-					procSnmp.Ip.FragOKs = value
+					procSnmp.Ip.FragOKs = &value
 				case "FragFails":
-					procSnmp.Ip.FragFails = value
+					procSnmp.Ip.FragFails = &value
 				case "FragCreates":
-					procSnmp.Ip.FragCreates = value
+					procSnmp.Ip.FragCreates = &value
 				}
 			case "Icmp":
 				switch key {
 				case "InMsgs":
-					procSnmp.Icmp.InMsgs = value
+					procSnmp.Icmp.InMsgs = &value
 				case "InErrors":
-					procSnmp.Icmp.InErrors = value
+					procSnmp.Icmp.InErrors = &value
 				case "InCsumErrors":
-					procSnmp.Icmp.InCsumErrors = value
+					procSnmp.Icmp.InCsumErrors = &value
 				case "InDestUnreachs":
-					procSnmp.Icmp.InDestUnreachs = value
+					procSnmp.Icmp.InDestUnreachs = &value
 				case "InTimeExcds":
-					procSnmp.Icmp.InTimeExcds = value
+					procSnmp.Icmp.InTimeExcds = &value
 				case "InParmProbs":
-					procSnmp.Icmp.InParmProbs = value
+					procSnmp.Icmp.InParmProbs = &value
 				case "InSrcQuenchs":
-					procSnmp.Icmp.InSrcQuenchs = value
+					procSnmp.Icmp.InSrcQuenchs = &value
 				case "InRedirects":
-					procSnmp.Icmp.InRedirects = value
+					procSnmp.Icmp.InRedirects = &value
 				case "InEchos":
-					procSnmp.Icmp.InEchos = value
+					procSnmp.Icmp.InEchos = &value
 				case "InEchoReps":
-					procSnmp.Icmp.InEchoReps = value
+					procSnmp.Icmp.InEchoReps = &value
 				case "InTimestamps":
-					procSnmp.Icmp.InTimestamps = value
+					procSnmp.Icmp.InTimestamps = &value
 				case "InTimestampReps":
-					procSnmp.Icmp.InTimestampReps = value
+					procSnmp.Icmp.InTimestampReps = &value
 				case "InAddrMasks":
-					procSnmp.Icmp.InAddrMasks = value
+					procSnmp.Icmp.InAddrMasks = &value
 				case "InAddrMaskReps":
-					procSnmp.Icmp.InAddrMaskReps = value
+					procSnmp.Icmp.InAddrMaskReps = &value
 				case "OutMsgs":
-					procSnmp.Icmp.OutMsgs = value
+					procSnmp.Icmp.OutMsgs = &value
 				case "OutErrors":
-					procSnmp.Icmp.OutErrors = value
+					procSnmp.Icmp.OutErrors = &value
 				case "OutDestUnreachs":
-					procSnmp.Icmp.OutDestUnreachs = value
+					procSnmp.Icmp.OutDestUnreachs = &value
 				case "OutTimeExcds":
-					procSnmp.Icmp.OutTimeExcds = value
+					procSnmp.Icmp.OutTimeExcds = &value
 				case "OutParmProbs":
-					procSnmp.Icmp.OutParmProbs = value
+					procSnmp.Icmp.OutParmProbs = &value
 				case "OutSrcQuenchs":
-					procSnmp.Icmp.OutSrcQuenchs = value
+					procSnmp.Icmp.OutSrcQuenchs = &value
 				case "OutRedirects":
-					procSnmp.Icmp.OutRedirects = value
+					procSnmp.Icmp.OutRedirects = &value
 				case "OutEchos":
-					procSnmp.Icmp.OutEchos = value
+					procSnmp.Icmp.OutEchos = &value
 				case "OutEchoReps":
-					procSnmp.Icmp.OutEchoReps = value
+					procSnmp.Icmp.OutEchoReps = &value
 				case "OutTimestamps":
-					procSnmp.Icmp.OutTimestamps = value
+					procSnmp.Icmp.OutTimestamps = &value
 				case "OutTimestampReps":
-					procSnmp.Icmp.OutTimestampReps = value
+					procSnmp.Icmp.OutTimestampReps = &value
 				case "OutAddrMasks":
-					procSnmp.Icmp.OutAddrMasks = value
+					procSnmp.Icmp.OutAddrMasks = &value
 				case "OutAddrMaskReps":
-					procSnmp.Icmp.OutAddrMaskReps = value
+					procSnmp.Icmp.OutAddrMaskReps = &value
 				}
 			case "IcmpMsg":
 				switch key {
 				case "InType3":
-					procSnmp.IcmpMsg.InType3 = value
+					procSnmp.IcmpMsg.InType3 = &value
 				case "OutType3":
-					procSnmp.IcmpMsg.OutType3 = value
+					procSnmp.IcmpMsg.OutType3 = &value
 				}
 			case "Tcp":
 				switch key {
 				case "RtoAlgorithm":
-					procSnmp.Tcp.RtoAlgorithm = value
+					procSnmp.Tcp.RtoAlgorithm = &value
 				case "RtoMin":
-					procSnmp.Tcp.RtoMin = value
+					procSnmp.Tcp.RtoMin = &value
 				case "RtoMax":
-					procSnmp.Tcp.RtoMax = value
+					procSnmp.Tcp.RtoMax = &value
 				case "MaxConn":
-					procSnmp.Tcp.MaxConn = value
+					procSnmp.Tcp.MaxConn = &value
 				case "ActiveOpens":
-					procSnmp.Tcp.ActiveOpens = value
+					procSnmp.Tcp.ActiveOpens = &value
 				case "PassiveOpens":
-					procSnmp.Tcp.PassiveOpens = value
+					procSnmp.Tcp.PassiveOpens = &value
 				case "AttemptFails":
-					procSnmp.Tcp.AttemptFails = value
+					procSnmp.Tcp.AttemptFails = &value
 				case "EstabResets":
-					procSnmp.Tcp.EstabResets = value
+					procSnmp.Tcp.EstabResets = &value
 				case "CurrEstab":
-					procSnmp.Tcp.CurrEstab = value
+					procSnmp.Tcp.CurrEstab = &value
 				case "InSegs":
-					procSnmp.Tcp.InSegs = value
+					procSnmp.Tcp.InSegs = &value
 				case "OutSegs":
-					procSnmp.Tcp.OutSegs = value
+					procSnmp.Tcp.OutSegs = &value
 				case "RetransSegs":
-					procSnmp.Tcp.RetransSegs = value
+					procSnmp.Tcp.RetransSegs = &value
 				case "InErrs":
-					procSnmp.Tcp.InErrs = value
+					procSnmp.Tcp.InErrs = &value
 				case "OutRsts":
-					procSnmp.Tcp.OutRsts = value
+					procSnmp.Tcp.OutRsts = &value
 				case "InCsumErrors":
-					procSnmp.Tcp.InCsumErrors = value
+					procSnmp.Tcp.InCsumErrors = &value
 				}
 			case "Udp":
 				switch key {
 				case "InDatagrams":
-					procSnmp.Udp.InDatagrams = value
+					procSnmp.Udp.InDatagrams = &value
 				case "NoPorts":
-					procSnmp.Udp.NoPorts = value
+					procSnmp.Udp.NoPorts = &value
 				case "InErrors":
-					procSnmp.Udp.InErrors = value
+					procSnmp.Udp.InErrors = &value
 				case "OutDatagrams":
-					procSnmp.Udp.OutDatagrams = value
+					procSnmp.Udp.OutDatagrams = &value
 				case "RcvbufErrors":
-					procSnmp.Udp.RcvbufErrors = value
+					procSnmp.Udp.RcvbufErrors = &value
 				case "SndbufErrors":
-					procSnmp.Udp.SndbufErrors = value
+					procSnmp.Udp.SndbufErrors = &value
 				case "InCsumErrors":
-					procSnmp.Udp.InCsumErrors = value
+					procSnmp.Udp.InCsumErrors = &value
 				case "IgnoredMulti":
-					procSnmp.Udp.IgnoredMulti = value
+					procSnmp.Udp.IgnoredMulti = &value
 				}
 			case "UdpLite":
 				switch key {
 				case "InDatagrams":
-					procSnmp.UdpLite.InDatagrams = value
+					procSnmp.UdpLite.InDatagrams = &value
 				case "NoPorts":
-					procSnmp.UdpLite.NoPorts = value
+					procSnmp.UdpLite.NoPorts = &value
 				case "InErrors":
-					procSnmp.UdpLite.InErrors = value
+					procSnmp.UdpLite.InErrors = &value
 				case "OutDatagrams":
-					procSnmp.UdpLite.OutDatagrams = value
+					procSnmp.UdpLite.OutDatagrams = &value
 				case "RcvbufErrors":
-					procSnmp.UdpLite.RcvbufErrors = value
+					procSnmp.UdpLite.RcvbufErrors = &value
 				case "SndbufErrors":
-					procSnmp.UdpLite.SndbufErrors = value
+					procSnmp.UdpLite.SndbufErrors = &value
 				case "InCsumErrors":
-					procSnmp.UdpLite.InCsumErrors = value
+					procSnmp.UdpLite.InCsumErrors = &value
 				case "IgnoredMulti":
-					procSnmp.UdpLite.IgnoredMulti = value
+					procSnmp.UdpLite.IgnoredMulti = &value
 				}
 			}
 		}

vendor/github.com/prometheus/procfs/proc_snmp6.go

@@ -36,106 +36,106 @@ type ProcSnmp6 struct {
 }
 
 type Ip6 struct { // nolint:revive
-	InReceives       float64
+	InReceives       *float64
-	InHdrErrors      float64
+	InHdrErrors      *float64
-	InTooBigErrors   float64
+	InTooBigErrors   *float64
-	InNoRoutes       float64
+	InNoRoutes       *float64
-	InAddrErrors     float64
+	InAddrErrors     *float64
-	InUnknownProtos  float64
+	InUnknownProtos  *float64
-	InTruncatedPkts  float64
+	InTruncatedPkts  *float64
-	InDiscards       float64
+	InDiscards       *float64
-	InDelivers       float64
+	InDelivers       *float64
-	OutForwDatagrams float64
+	OutForwDatagrams *float64
-	OutRequests      float64
+	OutRequests      *float64
-	OutDiscards      float64
+	OutDiscards      *float64
-	OutNoRoutes      float64
+	OutNoRoutes      *float64
-	ReasmTimeout     float64
+	ReasmTimeout     *float64
-	ReasmReqds       float64
+	ReasmReqds       *float64
-	ReasmOKs         float64
+	ReasmOKs         *float64
-	ReasmFails       float64
+	ReasmFails       *float64
-	FragOKs          float64
+	FragOKs          *float64
-	FragFails        float64
+	FragFails        *float64
-	FragCreates      float64
+	FragCreates      *float64
-	InMcastPkts      float64
+	InMcastPkts      *float64
-	OutMcastPkts     float64
+	OutMcastPkts     *float64
-	InOctets         float64
+	InOctets         *float64
-	OutOctets        float64
+	OutOctets        *float64
-	InMcastOctets    float64
+	InMcastOctets    *float64
-	OutMcastOctets   float64
+	OutMcastOctets   *float64
-	InBcastOctets    float64
+	InBcastOctets    *float64
-	OutBcastOctets   float64
+	OutBcastOctets   *float64
-	InNoECTPkts      float64
+	InNoECTPkts      *float64
-	InECT1Pkts       float64
+	InECT1Pkts       *float64
-	InECT0Pkts       float64
+	InECT0Pkts       *float64
-	InCEPkts         float64
+	InCEPkts         *float64
 }
 
 type Icmp6 struct {
-	InMsgs                    float64
+	InMsgs                    *float64
-	InErrors                  float64
+	InErrors                  *float64
-	OutMsgs                   float64
+	OutMsgs                   *float64
-	OutErrors                 float64
+	OutErrors                 *float64
-	InCsumErrors              float64
+	InCsumErrors              *float64
-	InDestUnreachs            float64
+	InDestUnreachs            *float64
-	InPktTooBigs              float64
+	InPktTooBigs              *float64
-	InTimeExcds               float64
+	InTimeExcds               *float64
-	InParmProblems            float64
+	InParmProblems            *float64
-	InEchos                   float64
+	InEchos                   *float64
-	InEchoReplies             float64
+	InEchoReplies             *float64
-	InGroupMembQueries        float64
+	InGroupMembQueries        *float64
-	InGroupMembResponses      float64
+	InGroupMembResponses      *float64
-	InGroupMembReductions     float64
+	InGroupMembReductions     *float64
-	InRouterSolicits          float64
+	InRouterSolicits          *float64
-	InRouterAdvertisements    float64
+	InRouterAdvertisements    *float64
-	InNeighborSolicits        float64
+	InNeighborSolicits        *float64
-	InNeighborAdvertisements  float64
+	InNeighborAdvertisements  *float64
-	InRedirects               float64
+	InRedirects               *float64
-	InMLDv2Reports            float64
+	InMLDv2Reports            *float64
-	OutDestUnreachs           float64
+	OutDestUnreachs           *float64
-	OutPktTooBigs             float64
+	OutPktTooBigs             *float64
-	OutTimeExcds              float64
+	OutTimeExcds              *float64
-	OutParmProblems           float64
+	OutParmProblems           *float64
-	OutEchos                  float64
+	OutEchos                  *float64
-	OutEchoReplies            float64
+	OutEchoReplies            *float64
-	OutGroupMembQueries       float64
+	OutGroupMembQueries       *float64
-	OutGroupMembResponses     float64
+	OutGroupMembResponses     *float64
-	OutGroupMembReductions    float64
+	OutGroupMembReductions    *float64
-	OutRouterSolicits         float64
+	OutRouterSolicits         *float64
-	OutRouterAdvertisements   float64
+	OutRouterAdvertisements   *float64
-	OutNeighborSolicits       float64
+	OutNeighborSolicits       *float64
-	OutNeighborAdvertisements float64
+	OutNeighborAdvertisements *float64
-	OutRedirects              float64
+	OutRedirects              *float64
-	OutMLDv2Reports           float64
+	OutMLDv2Reports           *float64
-	InType1                   float64
+	InType1                   *float64
-	InType134                 float64
+	InType134                 *float64
-	InType135                 float64
+	InType135                 *float64
-	InType136                 float64
+	InType136                 *float64
-	InType143                 float64
+	InType143                 *float64
-	OutType133                float64
+	OutType133                *float64
-	OutType135                float64
+	OutType135                *float64
-	OutType136                float64
+	OutType136                *float64
-	OutType143                float64
+	OutType143                *float64
 }
 
 type Udp6 struct { // nolint:revive
-	InDatagrams  float64
+	InDatagrams  *float64
-	NoPorts      float64
+	NoPorts      *float64
-	InErrors     float64
+	InErrors     *float64
-	OutDatagrams float64
+	OutDatagrams *float64
-	RcvbufErrors float64
+	RcvbufErrors *float64
-	SndbufErrors float64
+	SndbufErrors *float64
-	InCsumErrors float64
+	InCsumErrors *float64
-	IgnoredMulti float64
+	IgnoredMulti *float64
 }
 
 type UdpLite6 struct { // nolint:revive
-	InDatagrams  float64
+	InDatagrams  *float64
-	NoPorts      float64
+	NoPorts      *float64
-	InErrors     float64
+	InErrors     *float64
-	OutDatagrams float64
+	OutDatagrams *float64
-	RcvbufErrors float64
+	RcvbufErrors *float64
-	SndbufErrors float64
+	SndbufErrors *float64
-	InCsumErrors float64
+	InCsumErrors *float64
 }
 
 func (p Proc) Snmp6() (ProcSnmp6, error) {
@@ -182,197 +182,197 @@ func parseSNMP6Stats(r io.Reader) (ProcSnmp6, error) {
 			case "Ip6":
 				switch key {
 				case "InReceives":
-					procSnmp6.Ip6.InReceives = value
+					procSnmp6.Ip6.InReceives = &value
 				case "InHdrErrors":
-					procSnmp6.Ip6.InHdrErrors = value
+					procSnmp6.Ip6.InHdrErrors = &value
 				case "InTooBigErrors":
-					procSnmp6.Ip6.InTooBigErrors = value
+					procSnmp6.Ip6.InTooBigErrors = &value
 				case "InNoRoutes":
-					procSnmp6.Ip6.InNoRoutes = value
+					procSnmp6.Ip6.InNoRoutes = &value
 				case "InAddrErrors":
-					procSnmp6.Ip6.InAddrErrors = value
+					procSnmp6.Ip6.InAddrErrors = &value
 				case "InUnknownProtos":
-					procSnmp6.Ip6.InUnknownProtos = value
+					procSnmp6.Ip6.InUnknownProtos = &value
 				case "InTruncatedPkts":
-					procSnmp6.Ip6.InTruncatedPkts = value
+					procSnmp6.Ip6.InTruncatedPkts = &value
 				case "InDiscards":
-					procSnmp6.Ip6.InDiscards = value
+					procSnmp6.Ip6.InDiscards = &value
 				case "InDelivers":
-					procSnmp6.Ip6.InDelivers = value
+					procSnmp6.Ip6.InDelivers = &value
 				case "OutForwDatagrams":
-					procSnmp6.Ip6.OutForwDatagrams = value
+					procSnmp6.Ip6.OutForwDatagrams = &value
 				case "OutRequests":
-					procSnmp6.Ip6.OutRequests = value
+					procSnmp6.Ip6.OutRequests = &value
 				case "OutDiscards":
-					procSnmp6.Ip6.OutDiscards = value
+					procSnmp6.Ip6.OutDiscards = &value
 				case "OutNoRoutes":
-					procSnmp6.Ip6.OutNoRoutes = value
+					procSnmp6.Ip6.OutNoRoutes = &value
 				case "ReasmTimeout":
-					procSnmp6.Ip6.ReasmTimeout = value
+					procSnmp6.Ip6.ReasmTimeout = &value
 				case "ReasmReqds":
-					procSnmp6.Ip6.ReasmReqds = value
+					procSnmp6.Ip6.ReasmReqds = &value
 				case "ReasmOKs":
-					procSnmp6.Ip6.ReasmOKs = value
+					procSnmp6.Ip6.ReasmOKs = &value
 				case "ReasmFails":
-					procSnmp6.Ip6.ReasmFails = value
+					procSnmp6.Ip6.ReasmFails = &value
 				case "FragOKs":
-					procSnmp6.Ip6.FragOKs = value
+					procSnmp6.Ip6.FragOKs = &value
 				case "FragFails":
-					procSnmp6.Ip6.FragFails = value
+					procSnmp6.Ip6.FragFails = &value
 				case "FragCreates":
-					procSnmp6.Ip6.FragCreates = value
+					procSnmp6.Ip6.FragCreates = &value
 				case "InMcastPkts":
-					procSnmp6.Ip6.InMcastPkts = value
+					procSnmp6.Ip6.InMcastPkts = &value
 				case "OutMcastPkts":
-					procSnmp6.Ip6.OutMcastPkts = value
+					procSnmp6.Ip6.OutMcastPkts = &value
 				case "InOctets":
-					procSnmp6.Ip6.InOctets = value
+					procSnmp6.Ip6.InOctets = &value
 				case "OutOctets":
-					procSnmp6.Ip6.OutOctets = value
+					procSnmp6.Ip6.OutOctets = &value
 				case "InMcastOctets":
-					procSnmp6.Ip6.InMcastOctets = value
+					procSnmp6.Ip6.InMcastOctets = &value
 				case "OutMcastOctets":
-					procSnmp6.Ip6.OutMcastOctets = value
+					procSnmp6.Ip6.OutMcastOctets = &value
 				case "InBcastOctets":
-					procSnmp6.Ip6.InBcastOctets = value
+					procSnmp6.Ip6.InBcastOctets = &value
 				case "OutBcastOctets":
-					procSnmp6.Ip6.OutBcastOctets = value
+					procSnmp6.Ip6.OutBcastOctets = &value
 				case "InNoECTPkts":
-					procSnmp6.Ip6.InNoECTPkts = value
+					procSnmp6.Ip6.InNoECTPkts = &value
 				case "InECT1Pkts":
-					procSnmp6.Ip6.InECT1Pkts = value
+					procSnmp6.Ip6.InECT1Pkts = &value
 				case "InECT0Pkts":
-					procSnmp6.Ip6.InECT0Pkts = value
+					procSnmp6.Ip6.InECT0Pkts = &value
 				case "InCEPkts":
-					procSnmp6.Ip6.InCEPkts = value
+					procSnmp6.Ip6.InCEPkts = &value
 
 				}
 			case "Icmp6":
 				switch key {
 				case "InMsgs":
-					procSnmp6.Icmp6.InMsgs = value
+					procSnmp6.Icmp6.InMsgs = &value
 				case "InErrors":
-					procSnmp6.Icmp6.InErrors = value
+					procSnmp6.Icmp6.InErrors = &value
 				case "OutMsgs":
-					procSnmp6.Icmp6.OutMsgs = value
+					procSnmp6.Icmp6.OutMsgs = &value
 				case "OutErrors":
-					procSnmp6.Icmp6.OutErrors = value
+					procSnmp6.Icmp6.OutErrors = &value
 				case "InCsumErrors":
-					procSnmp6.Icmp6.InCsumErrors = value
+					procSnmp6.Icmp6.InCsumErrors = &value
 				case "InDestUnreachs":
-					procSnmp6.Icmp6.InDestUnreachs = value
+					procSnmp6.Icmp6.InDestUnreachs = &value
 				case "InPktTooBigs":
-					procSnmp6.Icmp6.InPktTooBigs = value
+					procSnmp6.Icmp6.InPktTooBigs = &value
 				case "InTimeExcds":
-					procSnmp6.Icmp6.InTimeExcds = value
+					procSnmp6.Icmp6.InTimeExcds = &value
 				case "InParmProblems":
-					procSnmp6.Icmp6.InParmProblems = value
+					procSnmp6.Icmp6.InParmProblems = &value
 				case "InEchos":
-					procSnmp6.Icmp6.InEchos = value
+					procSnmp6.Icmp6.InEchos = &value
 				case "InEchoReplies":
-					procSnmp6.Icmp6.InEchoReplies = value
+					procSnmp6.Icmp6.InEchoReplies = &value
 				case "InGroupMembQueries":
-					procSnmp6.Icmp6.InGroupMembQueries = value
+					procSnmp6.Icmp6.InGroupMembQueries = &value
 				case "InGroupMembResponses":
-					procSnmp6.Icmp6.InGroupMembResponses = value
+					procSnmp6.Icmp6.InGroupMembResponses = &value
 				case "InGroupMembReductions":
-					procSnmp6.Icmp6.InGroupMembReductions = value
+					procSnmp6.Icmp6.InGroupMembReductions = &value
 				case "InRouterSolicits":
-					procSnmp6.Icmp6.InRouterSolicits = value
+					procSnmp6.Icmp6.InRouterSolicits = &value
 				case "InRouterAdvertisements":
-					procSnmp6.Icmp6.InRouterAdvertisements = value
+					procSnmp6.Icmp6.InRouterAdvertisements = &value
 				case "InNeighborSolicits":
-					procSnmp6.Icmp6.InNeighborSolicits = value
+					procSnmp6.Icmp6.InNeighborSolicits = &value
 				case "InNeighborAdvertisements":
-					procSnmp6.Icmp6.InNeighborAdvertisements = value
+					procSnmp6.Icmp6.InNeighborAdvertisements = &value
 				case "InRedirects":
-					procSnmp6.Icmp6.InRedirects = value
+					procSnmp6.Icmp6.InRedirects = &value
 				case "InMLDv2Reports":
-					procSnmp6.Icmp6.InMLDv2Reports = value
+					procSnmp6.Icmp6.InMLDv2Reports = &value
 				case "OutDestUnreachs":
-					procSnmp6.Icmp6.OutDestUnreachs = value
+					procSnmp6.Icmp6.OutDestUnreachs = &value
 				case "OutPktTooBigs":
-					procSnmp6.Icmp6.OutPktTooBigs = value
+					procSnmp6.Icmp6.OutPktTooBigs = &value
 				case "OutTimeExcds":
-					procSnmp6.Icmp6.OutTimeExcds = value
+					procSnmp6.Icmp6.OutTimeExcds = &value
 				case "OutParmProblems":
-					procSnmp6.Icmp6.OutParmProblems = value
+					procSnmp6.Icmp6.OutParmProblems = &value
 				case "OutEchos":
-					procSnmp6.Icmp6.OutEchos = value
+					procSnmp6.Icmp6.OutEchos = &value
 				case "OutEchoReplies":
-					procSnmp6.Icmp6.OutEchoReplies = value
+					procSnmp6.Icmp6.OutEchoReplies = &value
 				case "OutGroupMembQueries":
-					procSnmp6.Icmp6.OutGroupMembQueries = value
+					procSnmp6.Icmp6.OutGroupMembQueries = &value
 				case "OutGroupMembResponses":
-					procSnmp6.Icmp6.OutGroupMembResponses = value
+					procSnmp6.Icmp6.OutGroupMembResponses = &value
 				case "OutGroupMembReductions":
-					procSnmp6.Icmp6.OutGroupMembReductions = value
+					procSnmp6.Icmp6.OutGroupMembReductions = &value
 				case "OutRouterSolicits":
-					procSnmp6.Icmp6.OutRouterSolicits = value
+					procSnmp6.Icmp6.OutRouterSolicits = &value
 				case "OutRouterAdvertisements":
-					procSnmp6.Icmp6.OutRouterAdvertisements = value
+					procSnmp6.Icmp6.OutRouterAdvertisements = &value
 				case "OutNeighborSolicits":
-					procSnmp6.Icmp6.OutNeighborSolicits = value
+					procSnmp6.Icmp6.OutNeighborSolicits = &value
 				case "OutNeighborAdvertisements":
-					procSnmp6.Icmp6.OutNeighborAdvertisements = value
+					procSnmp6.Icmp6.OutNeighborAdvertisements = &value
 				case "OutRedirects":
-					procSnmp6.Icmp6.OutRedirects = value
+					procSnmp6.Icmp6.OutRedirects = &value
 				case "OutMLDv2Reports":
-					procSnmp6.Icmp6.OutMLDv2Reports = value
+					procSnmp6.Icmp6.OutMLDv2Reports = &value
 				case "InType1":
-					procSnmp6.Icmp6.InType1 = value
+					procSnmp6.Icmp6.InType1 = &value
 				case "InType134":
-					procSnmp6.Icmp6.InType134 = value
+					procSnmp6.Icmp6.InType134 = &value
 				case "InType135":
-					procSnmp6.Icmp6.InType135 = value
+					procSnmp6.Icmp6.InType135 = &value
 				case "InType136":
-					procSnmp6.Icmp6.InType136 = value
+					procSnmp6.Icmp6.InType136 = &value
 				case "InType143":
-					procSnmp6.Icmp6.InType143 = value
+					procSnmp6.Icmp6.InType143 = &value
 				case "OutType133":
-					procSnmp6.Icmp6.OutType133 = value
+					procSnmp6.Icmp6.OutType133 = &value
 				case "OutType135":
-					procSnmp6.Icmp6.OutType135 = value
+					procSnmp6.Icmp6.OutType135 = &value
 				case "OutType136":
-					procSnmp6.Icmp6.OutType136 = value
+					procSnmp6.Icmp6.OutType136 = &value
 				case "OutType143":
-					procSnmp6.Icmp6.OutType143 = value
+					procSnmp6.Icmp6.OutType143 = &value
 				}
 			case "Udp6":
 				switch key {
 				case "InDatagrams":
-					procSnmp6.Udp6.InDatagrams = value
+					procSnmp6.Udp6.InDatagrams = &value
 				case "NoPorts":
-					procSnmp6.Udp6.NoPorts = value
+					procSnmp6.Udp6.NoPorts = &value
 				case "InErrors":
-					procSnmp6.Udp6.InErrors = value
+					procSnmp6.Udp6.InErrors = &value
 				case "OutDatagrams":
-					procSnmp6.Udp6.OutDatagrams = value
+					procSnmp6.Udp6.OutDatagrams = &value
 				case "RcvbufErrors":
-					procSnmp6.Udp6.RcvbufErrors = value
+					procSnmp6.Udp6.RcvbufErrors = &value
 				case "SndbufErrors":
-					procSnmp6.Udp6.SndbufErrors = value
+					procSnmp6.Udp6.SndbufErrors = &value
 				case "InCsumErrors":
-					procSnmp6.Udp6.InCsumErrors = value
+					procSnmp6.Udp6.InCsumErrors = &value
 				case "IgnoredMulti":
-					procSnmp6.Udp6.IgnoredMulti = value
+					procSnmp6.Udp6.IgnoredMulti = &value
 				}
 			case "UdpLite6":
 				switch key {
 				case "InDatagrams":
-					procSnmp6.UdpLite6.InDatagrams = value
+					procSnmp6.UdpLite6.InDatagrams = &value
 				case "NoPorts":
-					procSnmp6.UdpLite6.NoPorts = value
+					procSnmp6.UdpLite6.NoPorts = &value
 				case "InErrors":
-					procSnmp6.UdpLite6.InErrors = value
+					procSnmp6.UdpLite6.InErrors = &value
 				case "OutDatagrams":
-					procSnmp6.UdpLite6.OutDatagrams = value
+					procSnmp6.UdpLite6.OutDatagrams = &value
 				case "RcvbufErrors":
-					procSnmp6.UdpLite6.RcvbufErrors = value
+					procSnmp6.UdpLite6.RcvbufErrors = &value
 				case "SndbufErrors":
-					procSnmp6.UdpLite6.SndbufErrors = value
+					procSnmp6.UdpLite6.SndbufErrors = &value
 				case "InCsumErrors":
-					procSnmp6.UdpLite6.InCsumErrors = value
+					procSnmp6.UdpLite6.InCsumErrors = &value
 				}
 			}
 		}

vendor/github.com/prometheus/procfs/proc_stat.go

@@ -18,7 +18,6 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/prometheus/procfs/internal/fs"
 	"github.com/prometheus/procfs/internal/util"
 )
 
@@ -102,6 +101,8 @@ type ProcStat struct {
 	RSS int
 	// Soft limit in bytes on the rss of the process.
 	RSSLimit uint64
+	// CPU number last executed on.
+	Processor uint
 	// Real-time scheduling priority, a number in the range 1 to 99 for processes
 	// scheduled under a real-time policy, or 0, for non-real-time processes.
 	RTPriority uint
@@ -110,7 +111,7 @@ type ProcStat struct {
 	// Aggregated block I/O delays, measured in clock ticks (centiseconds).
 	DelayAcctBlkIOTicks uint64
 
-	proc fs.FS
+	proc FS
 }
 
 // NewStat returns the current status information of the process.
@@ -137,7 +138,7 @@ func (p Proc) Stat() (ProcStat, error) {
 	)
 
 	if l < 0 || r < 0 {
-		return ProcStat{}, fmt.Errorf("unexpected format, couldn't extract comm %q", data)
+		return ProcStat{}, fmt.Errorf("%w: unexpected format, couldn't extract comm %q", ErrFileParse, data)
 	}
 
 	s.Comm = string(data[l+1 : r])
@@ -184,7 +185,7 @@ func (p Proc) Stat() (ProcStat, error) {
 		&ignoreUint64,
 		&ignoreUint64,
 		&ignoreInt64,
-		&ignoreInt64,
+		&s.Processor,
 		&s.RTPriority,
 		&s.Policy,
 		&s.DelayAcctBlkIOTicks,
@@ -208,8 +209,7 @@ func (s ProcStat) ResidentMemory() int {
 
 // StartTime returns the unix timestamp of the process in seconds.
 func (s ProcStat) StartTime() (float64, error) {
-	fs := FS{proc: s.proc}
+	stat, err := s.proc.Stat()
-	stat, err := fs.Stat()
 	if err != nil {
 		return 0, err
 	}

vendor/github.com/prometheus/procfs/proc_status.go

@@ -15,6 +15,7 @@ package procfs
 
 import (
 	"bytes"
+	"sort"
 	"strconv"
 	"strings"
 
@@ -22,7 +23,7 @@ import (
 )
 
 // ProcStatus provides status information about the process,
-// read from /proc/[pid]/stat.
+// read from /proc/[pid]/status.
 type ProcStatus struct {
 	// The process ID.
 	PID int
@@ -31,6 +32,8 @@ type ProcStatus struct {
 
 	// Thread group ID.
 	TGID int
+	// List of Pid namespace.
+	NSpids []uint64
 
 	// Peak virtual memory size.
 	VmPeak uint64 // nolint:revive
@@ -76,6 +79,9 @@ type ProcStatus struct {
 	UIDs [4]string
 	// GIDs of the process (Real, effective, saved set, and filesystem GIDs)
 	GIDs [4]string
+
+	// CpusAllowedList: List of cpu cores processes are allowed to run on.
+	CpusAllowedList []uint64
 }
 
 // NewStatus returns the current status information of the process.
@@ -96,10 +102,10 @@ func (p Proc) NewStatus() (ProcStatus, error) {
 		kv := strings.SplitN(line, ":", 2)
 
 		// removes spaces
-		k := string(strings.TrimSpace(kv[0]))
+		k := strings.TrimSpace(kv[0])
-		v := string(strings.TrimSpace(kv[1]))
+		v := strings.TrimSpace(kv[1])
 		// removes "kB"
-		v = string(bytes.Trim([]byte(v), " kB"))
+		v = strings.TrimSuffix(v, " kB")
 
 		// value to int when possible
 		// we can skip error check here, 'cause vKBytes is not used when value is a string
@@ -123,6 +129,8 @@ func (s *ProcStatus) fillStatus(k string, vString string, vUint uint64, vUintByt
 		copy(s.UIDs[:], strings.Split(vString, "\t"))
 	case "Gid":
 		copy(s.GIDs[:], strings.Split(vString, "\t"))
+	case "NSpid":
+		s.NSpids = calcNSPidsList(vString)
 	case "VmPeak":
 		s.VmPeak = vUintBytes
 	case "VmSize":
@@ -161,10 +169,53 @@ func (s *ProcStatus) fillStatus(k string, vString string, vUint uint64, vUintByt
 		s.VoluntaryCtxtSwitches = vUint
 	case "nonvoluntary_ctxt_switches":
 		s.NonVoluntaryCtxtSwitches = vUint
+	case "Cpus_allowed_list":
+		s.CpusAllowedList = calcCpusAllowedList(vString)
 	}
+
 }
 
 // TotalCtxtSwitches returns the total context switch.
 func (s ProcStatus) TotalCtxtSwitches() uint64 {
 	return s.VoluntaryCtxtSwitches + s.NonVoluntaryCtxtSwitches
 }
+
+func calcCpusAllowedList(cpuString string) []uint64 {
+	s := strings.Split(cpuString, ",")
+
+	var g []uint64
+
+	for _, cpu := range s {
+		// parse cpu ranges, example: 1-3=[1,2,3]
+		if l := strings.Split(strings.TrimSpace(cpu), "-"); len(l) > 1 {
+			startCPU, _ := strconv.ParseUint(l[0], 10, 64)
+			endCPU, _ := strconv.ParseUint(l[1], 10, 64)
+
+			for i := startCPU; i <= endCPU; i++ {
+				g = append(g, i)
+			}
+		} else if len(l) == 1 {
+			cpu, _ := strconv.ParseUint(l[0], 10, 64)
+			g = append(g, cpu)
+		}
+
+	}
+
+	sort.Slice(g, func(i, j int) bool { return g[i] < g[j] })
+	return g
+}
+
+func calcNSPidsList(nspidsString string) []uint64 {
+	s := strings.Split(nspidsString, " ")
+	var nspids []uint64
+
+	for _, nspid := range s {
+		nspid, _ := strconv.ParseUint(nspid, 10, 64)
+		if nspid == 0 {
+			continue
+		}
+		nspids = append(nspids, nspid)
+	}
+
+	return nspids
+}

vendor/github.com/prometheus/procfs/proc_sys.go

@@ -44,7 +44,7 @@ func (fs FS) SysctlInts(sysctl string) ([]int, error) {
 		vp := util.NewValueParser(f)
 		values[i] = vp.Int()
 		if err := vp.Err(); err != nil {
-			return nil, fmt.Errorf("field %d in sysctl %s is not a valid int: %w", i, sysctl, err)
+			return nil, fmt.Errorf("%s: field %d in sysctl %s is not a valid int: %w", ErrFileParse, i, sysctl, err)
 		}
 	}
 	return values, nil

vendor/github.com/prometheus/procfs/slab.go

@@ -68,7 +68,7 @@ func parseV21SlabEntry(line string) (*Slab, error) {
 	l := slabSpace.ReplaceAllString(line, " ")
 	s := strings.Split(l, " ")
 	if len(s) != 16 {
-		return nil, fmt.Errorf("unable to parse: %q", line)
+		return nil, fmt.Errorf("%w: unable to parse: %q", ErrFileParse, line)
 	}
 	var err error
 	i := &Slab{Name: s[0]}