update latest prometheus client dependency and its dependencies

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/mjl-/sherpadoc v0.0.12
 	github.com/mjl-/sherpaprom v0.0.2
 	github.com/mjl-/sherpats v0.0.4
-	github.com/prometheus/client_golang v1.14.0
+	github.com/prometheus/client_golang v1.17.0
 	go.etcd.io/bbolt v1.3.8
 	golang.org/x/crypto v0.15.0
 	golang.org/x/exp v0.0.0-20231108232855-2478ac86f678
@@ -22,15 +22,15 @@ require (
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/mjl-/xfmt v0.0.2 // indirect
-	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16 // indirect
-	github.com/prometheus/common v0.37.0 // indirect
+	github.com/prometheus/common v0.44.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
+	github.com/prometheus/procfs v0.11.1 // indirect
 	golang.org/x/mod v0.14.0 // indirect
 	golang.org/x/sys v0.14.0 // indirect
 	golang.org/x/tools v0.15.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
 )

go.sum

@@ -1,150 +1,30 @@
-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=
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 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
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 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
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-google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
-google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
-google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-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 v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
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-google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
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 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=
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-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 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 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-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=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/qr v0.2.0 h1:6vBLea5/NRMVTz8V66gipeLycZMl/+UlFmk8DvqQ6WY=
 rsc.io/qr v0.2.0/go.mod h1:IF+uZjkb9fqyeF/4tlBoynqmQxUoPfWEKh921coOuXs=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

vendor/github.com/cespare/xxhash/v2/README.md

@@ -3,8 +3,7 @@
 [![Go Reference](https://pkg.go.dev/badge/github.com/cespare/xxhash/v2.svg)](https://pkg.go.dev/github.com/cespare/xxhash/v2)
 [![Test](https://github.com/cespare/xxhash/actions/workflows/test.yml/badge.svg)](https://github.com/cespare/xxhash/actions/workflows/test.yml)
 
-xxhash is a Go implementation of the 64-bit
+xxhash is a Go implementation of the 64-bit [xxHash] algorithm, XXH64. This is a
-[xxHash](http://cyan4973.github.io/xxHash/) algorithm, XXH64. This is a
 high-quality hashing algorithm that is much faster than anything in the Go
 standard library.
 
@@ -25,8 +24,11 @@ func (*Digest) WriteString(string) (int, error)
 func (*Digest) Sum64() uint64
 ```
 
-This implementation provides a fast pure-Go implementation and an even faster
+The package is written with optimized pure Go and also contains even faster
-assembly implementation for amd64.
+assembly implementations for amd64 and arm64. If desired, the `purego` build tag
+opts into using the Go code even on those architectures.
+
+[xxHash]: http://cyan4973.github.io/xxHash/
 
 ## Compatibility
 
@@ -45,19 +47,20 @@ I recommend using the latest release of Go.
 Here are some quick benchmarks comparing the pure-Go and assembly
 implementations of Sum64.
 
-| input size | purego | asm |
+| input size | purego    | asm       |
-| --- | --- | --- |
+| ---------- | --------- | --------- |
-| 5 B   |  979.66 MB/s |  1291.17 MB/s  |
+| 4 B        |  1.3 GB/s |  1.2 GB/s |
-| 100 B | 7475.26 MB/s | 7973.40 MB/s  |
+| 16 B       |  2.9 GB/s |  3.5 GB/s |
-| 4 KB  | 17573.46 MB/s | 17602.65 MB/s |
+| 100 B      |  6.9 GB/s |  8.1 GB/s |
-| 10 MB | 17131.46 MB/s | 17142.16 MB/s |
+| 4 KB       | 11.7 GB/s | 16.7 GB/s |
+| 10 MB      | 12.0 GB/s | 17.3 GB/s |
 
-These numbers were generated on Ubuntu 18.04 with an Intel i7-8700K CPU using
+These numbers were generated on Ubuntu 20.04 with an Intel Xeon Platinum 8252C
-the following commands under Go 1.11.2:
+CPU using the following commands under Go 1.19.2:
 
 ```
-$ go test -tags purego -benchtime 10s -bench '/xxhash,direct,bytes'
+benchstat <(go test -tags purego -benchtime 500ms -count 15 -bench 'Sum64$')
-$ go test -benchtime 10s -bench '/xxhash,direct,bytes'
+benchstat <(go test -benchtime 500ms -count 15 -bench 'Sum64$')
 ```
 
 ## Projects using this package

vendor/github.com/cespare/xxhash/v2/testall.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -eu -o pipefail
+
+# Small convenience script for running the tests with various combinations of
+# arch/tags. This assumes we're running on amd64 and have qemu available.
+
+go test ./...
+go test -tags purego ./...
+GOARCH=arm64 go test
+GOARCH=arm64 go test -tags purego

vendor/github.com/cespare/xxhash/v2/xxhash.go

@@ -16,19 +16,11 @@ const (
 	prime5 uint64 = 2870177450012600261
 )
 
-// NOTE(caleb): I'm using both consts and vars of the primes. Using consts where
+// Store the primes in an array as well.
-// possible in the Go code is worth a small (but measurable) performance boost
+//
-// by avoiding some MOVQs. Vars are needed for the asm and also are useful for
+// The consts are used when possible in Go code to avoid MOVs but we need a
-// convenience in the Go code in a few places where we need to intentionally
+// contiguous array of the assembly code.
-// avoid constant arithmetic (e.g., v1 := prime1 + prime2 fails because the
+var primes = [...]uint64{prime1, prime2, prime3, prime4, prime5}
-// result overflows a uint64).
-var (
-	prime1v = prime1
-	prime2v = prime2
-	prime3v = prime3
-	prime4v = prime4
-	prime5v = prime5
-)
 
 // Digest implements hash.Hash64.
 type Digest struct {
@@ -50,10 +42,10 @@ func New() *Digest {
 
 // Reset clears the Digest's state so that it can be reused.
 func (d *Digest) Reset() {
-	d.v1 = prime1v + prime2
+	d.v1 = primes[0] + prime2
 	d.v2 = prime2
 	d.v3 = 0
-	d.v4 = -prime1v
+	d.v4 = -primes[0]
 	d.total = 0
 	d.n = 0
 }
@@ -69,21 +61,23 @@ func (d *Digest) Write(b []byte) (n int, err error) {
 	n = len(b)
 	d.total += uint64(n)
 
+	memleft := d.mem[d.n&(len(d.mem)-1):]
+
 	if d.n+n < 32 {
 		// This new data doesn't even fill the current block.
-		copy(d.mem[d.n:], b)
+		copy(memleft, b)
 		d.n += n
 		return
 	}
 
 	if d.n > 0 {
 		// Finish off the partial block.
-		copy(d.mem[d.n:], b)
+		c := copy(memleft, b)
 		d.v1 = round(d.v1, u64(d.mem[0:8]))
 		d.v2 = round(d.v2, u64(d.mem[8:16]))
 		d.v3 = round(d.v3, u64(d.mem[16:24]))
 		d.v4 = round(d.v4, u64(d.mem[24:32]))
-		b = b[32-d.n:]
+		b = b[c:]
 		d.n = 0
 	}
 
@@ -133,21 +127,20 @@ func (d *Digest) Sum64() uint64 {
 
 	h += d.total
 
-	i, end := 0, d.n
+	b := d.mem[:d.n&(len(d.mem)-1)]
-	for ; i+8 <= end; i += 8 {
+	for ; len(b) >= 8; b = b[8:] {
-		k1 := round(0, u64(d.mem[i:i+8]))
+		k1 := round(0, u64(b[:8]))
 		h ^= k1
 		h = rol27(h)*prime1 + prime4
 	}
-	if i+4 <= end {
+	if len(b) >= 4 {
-		h ^= uint64(u32(d.mem[i:i+4])) * prime1
+		h ^= uint64(u32(b[:4])) * prime1
 		h = rol23(h)*prime2 + prime3
-		i += 4
+		b = b[4:]
 	}
-	for i < end {
+	for ; len(b) > 0; b = b[1:] {
-		h ^= uint64(d.mem[i]) * prime5
+		h ^= uint64(b[0]) * prime5
 		h = rol11(h) * prime1
-		i++
 	}
 
 	h ^= h >> 33

vendor/github.com/cespare/xxhash/v2/xxhash_amd64.s

@@ -1,215 +1,209 @@
+//go:build !appengine && gc && !purego
 // +build !appengine
 // +build gc
 // +build !purego
 
 #include "textflag.h"
 
-// Register allocation:
+// Registers:
-// AX	h
+#define h      AX
-// SI	pointer to advance through b
+#define d      AX
-// DX	n
+#define p      SI // pointer to advance through b
-// BX	loop end
+#define n      DX
-// R8	v1, k1
+#define end    BX // loop end
-// R9	v2
+#define v1     R8
-// R10	v3
+#define v2     R9
-// R11	v4
+#define v3     R10
-// R12	tmp
+#define v4     R11
-// R13	prime1v
+#define x      R12
-// R14	prime2v
+#define prime1 R13
-// DI	prime4v
+#define prime2 R14
+#define prime4 DI
 
-// round reads from and advances the buffer pointer in SI.
+#define round(acc, x) \
-// It assumes that R13 has prime1v and R14 has prime2v.
+	IMULQ prime2, x   \
-#define round(r) \
+	ADDQ  x, acc      \
-	MOVQ  (SI), R12 \
+	ROLQ  $31, acc    \
-	ADDQ  $8, SI    \
+	IMULQ prime1, acc
-	IMULQ R14, R12  \
-	ADDQ  R12, r    \
-	ROLQ  $31, r    \
-	IMULQ R13, r
 
-// mergeRound applies a merge round on the two registers acc and val.
+// round0 performs the operation x = round(0, x).
-// It assumes that R13 has prime1v, R14 has prime2v, and DI has prime4v.
+#define round0(x) \
-#define mergeRound(acc, val) \
+	IMULQ prime2, x \
-	IMULQ R14, val \
+	ROLQ  $31, x    \
-	ROLQ  $31, val \
+	IMULQ prime1, x
-	IMULQ R13, val \
+
-	XORQ  val, acc \
+// mergeRound applies a merge round on the two registers acc and x.
-	IMULQ R13, acc \
+// It assumes that prime1, prime2, and prime4 have been loaded.
-	ADDQ  DI, acc
+#define mergeRound(acc, x) \
+	round0(x)         \
+	XORQ  x, acc      \
+	IMULQ prime1, acc \
+	ADDQ  prime4, acc
+
+// blockLoop processes as many 32-byte blocks as possible,
+// updating v1, v2, v3, and v4. It assumes that there is at least one block
+// to process.
+#define blockLoop() \
+loop:  \
+	MOVQ +0(p), x  \
+	round(v1, x)   \
+	MOVQ +8(p), x  \
+	round(v2, x)   \
+	MOVQ +16(p), x \
+	round(v3, x)   \
+	MOVQ +24(p), x \
+	round(v4, x)   \
+	ADDQ $32, p    \
+	CMPQ p, end    \
+	JLE  loop
 
 // func Sum64(b []byte) uint64
-TEXT ·Sum64(SB), NOSPLIT, $0-32
+TEXT ·Sum64(SB), NOSPLIT|NOFRAME, $0-32
 	// Load fixed primes.
-	MOVQ ·prime1v(SB), R13
+	MOVQ ·primes+0(SB), prime1
-	MOVQ ·prime2v(SB), R14
+	MOVQ ·primes+8(SB), prime2
-	MOVQ ·prime4v(SB), DI
+	MOVQ ·primes+24(SB), prime4
 
 	// Load slice.
-	MOVQ b_base+0(FP), SI
+	MOVQ b_base+0(FP), p
-	MOVQ b_len+8(FP), DX
+	MOVQ b_len+8(FP), n
-	LEAQ (SI)(DX*1), BX
+	LEAQ (p)(n*1), end
 
 	// The first loop limit will be len(b)-32.
-	SUBQ $32, BX
+	SUBQ $32, end
 
 	// Check whether we have at least one block.
-	CMPQ DX, $32
+	CMPQ n, $32
 	JLT  noBlocks
 
 	// Set up initial state (v1, v2, v3, v4).
-	MOVQ R13, R8
+	MOVQ prime1, v1
-	ADDQ R14, R8
+	ADDQ prime2, v1
-	MOVQ R14, R9
+	MOVQ prime2, v2
-	XORQ R10, R10
+	XORQ v3, v3
-	XORQ R11, R11
+	XORQ v4, v4
-	SUBQ R13, R11
+	SUBQ prime1, v4
 
-	// Loop until SI > BX.
+	blockLoop()
-blockLoop:
-	round(R8)
-	round(R9)
-	round(R10)
-	round(R11)
 
-	CMPQ SI, BX
+	MOVQ v1, h
-	JLE  blockLoop
+	ROLQ $1, h
+	MOVQ v2, x
+	ROLQ $7, x
+	ADDQ x, h
+	MOVQ v3, x
+	ROLQ $12, x
+	ADDQ x, h
+	MOVQ v4, x
+	ROLQ $18, x
+	ADDQ x, h
 
-	MOVQ R8, AX
+	mergeRound(h, v1)
-	ROLQ $1, AX
+	mergeRound(h, v2)
-	MOVQ R9, R12
+	mergeRound(h, v3)
-	ROLQ $7, R12
+	mergeRound(h, v4)
-	ADDQ R12, AX
-	MOVQ R10, R12
-	ROLQ $12, R12
-	ADDQ R12, AX
-	MOVQ R11, R12
-	ROLQ $18, R12
-	ADDQ R12, AX
-
-	mergeRound(AX, R8)
-	mergeRound(AX, R9)
-	mergeRound(AX, R10)
-	mergeRound(AX, R11)
 
 	JMP afterBlocks
 
 noBlocks:
-	MOVQ ·prime5v(SB), AX
+	MOVQ ·primes+32(SB), h
 
 afterBlocks:
-	ADDQ DX, AX
+	ADDQ n, h
 
-	// Right now BX has len(b)-32, and we want to loop until SI > len(b)-8.
+	ADDQ $24, end
-	ADDQ $24, BX
+	CMPQ p, end
+	JG   try4
 
-	CMPQ SI, BX
+loop8:
-	JG   fourByte
+	MOVQ  (p), x
+	ADDQ  $8, p
+	round0(x)
+	XORQ  x, h
+	ROLQ  $27, h
+	IMULQ prime1, h
+	ADDQ  prime4, h
 
-wordLoop:
+	CMPQ p, end
-	// Calculate k1.
+	JLE  loop8
-	MOVQ  (SI), R8
-	ADDQ  $8, SI
-	IMULQ R14, R8
-	ROLQ  $31, R8
-	IMULQ R13, R8
 
-	XORQ  R8, AX
+try4:
-	ROLQ  $27, AX
+	ADDQ $4, end
-	IMULQ R13, AX
+	CMPQ p, end
-	ADDQ  DI, AX
+	JG   try1
 
-	CMPQ SI, BX
+	MOVL  (p), x
-	JLE  wordLoop
+	ADDQ  $4, p
+	IMULQ prime1, x
+	XORQ  x, h
 
-fourByte:
+	ROLQ  $23, h
-	ADDQ $4, BX
+	IMULQ prime2, h
-	CMPQ SI, BX
+	ADDQ  ·primes+16(SB), h
-	JG   singles
 
-	MOVL  (SI), R8
+try1:
-	ADDQ  $4, SI
+	ADDQ $4, end
-	IMULQ R13, R8
+	CMPQ p, end
-	XORQ  R8, AX
-
-	ROLQ  $23, AX
-	IMULQ R14, AX
-	ADDQ  ·prime3v(SB), AX
-
-singles:
-	ADDQ $4, BX
-	CMPQ SI, BX
 	JGE  finalize
 
-singlesLoop:
+loop1:
-	MOVBQZX (SI), R12
+	MOVBQZX (p), x
-	ADDQ    $1, SI
+	ADDQ    $1, p
-	IMULQ   ·prime5v(SB), R12
+	IMULQ   ·primes+32(SB), x
-	XORQ    R12, AX
+	XORQ    x, h
+	ROLQ    $11, h
+	IMULQ   prime1, h
 
-	ROLQ  $11, AX
+	CMPQ p, end
-	IMULQ R13, AX
+	JL   loop1
-
-	CMPQ SI, BX
-	JL   singlesLoop
 
 finalize:
-	MOVQ  AX, R12
+	MOVQ  h, x
-	SHRQ  $33, R12
+	SHRQ  $33, x
-	XORQ  R12, AX
+	XORQ  x, h
-	IMULQ R14, AX
+	IMULQ prime2, h
-	MOVQ  AX, R12
+	MOVQ  h, x
-	SHRQ  $29, R12
+	SHRQ  $29, x
-	XORQ  R12, AX
+	XORQ  x, h
-	IMULQ ·prime3v(SB), AX
+	IMULQ ·primes+16(SB), h
-	MOVQ  AX, R12
+	MOVQ  h, x
-	SHRQ  $32, R12
+	SHRQ  $32, x
-	XORQ  R12, AX
+	XORQ  x, h
 
-	MOVQ AX, ret+24(FP)
+	MOVQ h, ret+24(FP)
 	RET
 
-// writeBlocks uses the same registers as above except that it uses AX to store
-// the d pointer.
-
 // func writeBlocks(d *Digest, b []byte) int
-TEXT ·writeBlocks(SB), NOSPLIT, $0-40
+TEXT ·writeBlocks(SB), NOSPLIT|NOFRAME, $0-40
 	// Load fixed primes needed for round.
-	MOVQ ·prime1v(SB), R13
+	MOVQ ·primes+0(SB), prime1
-	MOVQ ·prime2v(SB), R14
+	MOVQ ·primes+8(SB), prime2
 
 	// Load slice.
-	MOVQ b_base+8(FP), SI
+	MOVQ b_base+8(FP), p
-	MOVQ b_len+16(FP), DX
+	MOVQ b_len+16(FP), n
-	LEAQ (SI)(DX*1), BX
+	LEAQ (p)(n*1), end
-	SUBQ $32, BX
+	SUBQ $32, end
 
 	// Load vN from d.
-	MOVQ d+0(FP), AX
+	MOVQ s+0(FP), d
-	MOVQ 0(AX), R8   // v1
+	MOVQ 0(d), v1
-	MOVQ 8(AX), R9   // v2
+	MOVQ 8(d), v2
-	MOVQ 16(AX), R10 // v3
+	MOVQ 16(d), v3
-	MOVQ 24(AX), R11 // v4
+	MOVQ 24(d), v4
 
 	// We don't need to check the loop condition here; this function is
 	// always called with at least one block of data to process.
-blockLoop:
+	blockLoop()
-	round(R8)
-	round(R9)
-	round(R10)
-	round(R11)
-
-	CMPQ SI, BX
-	JLE  blockLoop
 
 	// Copy vN back to d.
-	MOVQ R8, 0(AX)
+	MOVQ v1, 0(d)
-	MOVQ R9, 8(AX)
+	MOVQ v2, 8(d)
-	MOVQ R10, 16(AX)
+	MOVQ v3, 16(d)
-	MOVQ R11, 24(AX)
+	MOVQ v4, 24(d)
 
-	// The number of bytes written is SI minus the old base pointer.
+	// The number of bytes written is p minus the old base pointer.
-	SUBQ b_base+8(FP), SI
+	SUBQ b_base+8(FP), p
-	MOVQ SI, ret+32(FP)
+	MOVQ p, ret+32(FP)
 
 	RET

vendor/github.com/cespare/xxhash/v2/xxhash_arm64.s

@@ -0,0 +1,183 @@
+//go:build !appengine && gc && !purego
+// +build !appengine
+// +build gc
+// +build !purego
+
+#include "textflag.h"
+
+// Registers:
+#define digest	R1
+#define h	R2 // return value
+#define p	R3 // input pointer
+#define n	R4 // input length
+#define nblocks	R5 // n / 32
+#define prime1	R7
+#define prime2	R8
+#define prime3	R9
+#define prime4	R10
+#define prime5	R11
+#define v1	R12
+#define v2	R13
+#define v3	R14
+#define v4	R15
+#define x1	R20
+#define x2	R21
+#define x3	R22
+#define x4	R23
+
+#define round(acc, x) \
+	MADD prime2, acc, x, acc \
+	ROR  $64-31, acc         \
+	MUL  prime1, acc
+
+// round0 performs the operation x = round(0, x).
+#define round0(x) \
+	MUL prime2, x \
+	ROR $64-31, x \
+	MUL prime1, x
+
+#define mergeRound(acc, x) \
+	round0(x)                     \
+	EOR  x, acc                   \
+	MADD acc, prime4, prime1, acc
+
+// blockLoop processes as many 32-byte blocks as possible,
+// updating v1, v2, v3, and v4. It assumes that n >= 32.
+#define blockLoop() \
+	LSR     $5, n, nblocks  \
+	PCALIGN $16             \
+	loop:                   \
+	LDP.P   16(p), (x1, x2) \
+	LDP.P   16(p), (x3, x4) \
+	round(v1, x1)           \
+	round(v2, x2)           \
+	round(v3, x3)           \
+	round(v4, x4)           \
+	SUB     $1, nblocks     \
+	CBNZ    nblocks, loop
+
+// func Sum64(b []byte) uint64
+TEXT ·Sum64(SB), NOSPLIT|NOFRAME, $0-32
+	LDP b_base+0(FP), (p, n)
+
+	LDP  ·primes+0(SB), (prime1, prime2)
+	LDP  ·primes+16(SB), (prime3, prime4)
+	MOVD ·primes+32(SB), prime5
+
+	CMP  $32, n
+	CSEL LT, prime5, ZR, h // if n < 32 { h = prime5 } else { h = 0 }
+	BLT  afterLoop
+
+	ADD  prime1, prime2, v1
+	MOVD prime2, v2
+	MOVD $0, v3
+	NEG  prime1, v4
+
+	blockLoop()
+
+	ROR $64-1, v1, x1
+	ROR $64-7, v2, x2
+	ADD x1, x2
+	ROR $64-12, v3, x3
+	ROR $64-18, v4, x4
+	ADD x3, x4
+	ADD x2, x4, h
+
+	mergeRound(h, v1)
+	mergeRound(h, v2)
+	mergeRound(h, v3)
+	mergeRound(h, v4)
+
+afterLoop:
+	ADD n, h
+
+	TBZ   $4, n, try8
+	LDP.P 16(p), (x1, x2)
+
+	round0(x1)
+
+	// NOTE: here and below, sequencing the EOR after the ROR (using a
+	// rotated register) is worth a small but measurable speedup for small
+	// inputs.
+	ROR  $64-27, h
+	EOR  x1 @> 64-27, h, h
+	MADD h, prime4, prime1, h
+
+	round0(x2)
+	ROR  $64-27, h
+	EOR  x2 @> 64-27, h, h
+	MADD h, prime4, prime1, h
+
+try8:
+	TBZ    $3, n, try4
+	MOVD.P 8(p), x1
+
+	round0(x1)
+	ROR  $64-27, h
+	EOR  x1 @> 64-27, h, h
+	MADD h, prime4, prime1, h
+
+try4:
+	TBZ     $2, n, try2
+	MOVWU.P 4(p), x2
+
+	MUL  prime1, x2
+	ROR  $64-23, h
+	EOR  x2 @> 64-23, h, h
+	MADD h, prime3, prime2, h
+
+try2:
+	TBZ     $1, n, try1
+	MOVHU.P 2(p), x3
+	AND     $255, x3, x1
+	LSR     $8, x3, x2
+
+	MUL prime5, x1
+	ROR $64-11, h
+	EOR x1 @> 64-11, h, h
+	MUL prime1, h
+
+	MUL prime5, x2
+	ROR $64-11, h
+	EOR x2 @> 64-11, h, h
+	MUL prime1, h
+
+try1:
+	TBZ   $0, n, finalize
+	MOVBU (p), x4
+
+	MUL prime5, x4
+	ROR $64-11, h
+	EOR x4 @> 64-11, h, h
+	MUL prime1, h
+
+finalize:
+	EOR h >> 33, h
+	MUL prime2, h
+	EOR h >> 29, h
+	MUL prime3, h
+	EOR h >> 32, h
+
+	MOVD h, ret+24(FP)
+	RET
+
+// func writeBlocks(d *Digest, b []byte) int
+TEXT ·writeBlocks(SB), NOSPLIT|NOFRAME, $0-40
+	LDP ·primes+0(SB), (prime1, prime2)
+
+	// Load state. Assume v[1-4] are stored contiguously.
+	MOVD d+0(FP), digest
+	LDP  0(digest), (v1, v2)
+	LDP  16(digest), (v3, v4)
+
+	LDP b_base+8(FP), (p, n)
+
+	blockLoop()
+
+	// Store updated state.
+	STP (v1, v2), 0(digest)
+	STP (v3, v4), 16(digest)
+
+	BIC  $31, n
+	MOVD n, ret+32(FP)
+	RET

vendor/github.com/cespare/xxhash/v2/xxhash_asm.go

@@ -1,3 +1,5 @@
+//go:build (amd64 || arm64) && !appengine && gc && !purego
+// +build amd64 arm64
 // +build !appengine
 // +build gc
 // +build !purego

vendor/github.com/cespare/xxhash/v2/xxhash_other.go

@@ -1,4 +1,5 @@
-// +build !amd64 appengine !gc purego
+//go:build (!amd64 && !arm64) || appengine || !gc || purego
+// +build !amd64,!arm64 appengine !gc purego
 
 package xxhash
 
@@ -14,10 +15,10 @@ func Sum64(b []byte) uint64 {
 	var h uint64
 
 	if n >= 32 {
-		v1 := prime1v + prime2
+		v1 := primes[0] + prime2
 		v2 := prime2
 		v3 := uint64(0)
-		v4 := -prime1v
+		v4 := -primes[0]
 		for len(b) >= 32 {
 			v1 = round(v1, u64(b[0:8:len(b)]))
 			v2 = round(v2, u64(b[8:16:len(b)]))
@@ -36,19 +37,18 @@ func Sum64(b []byte) uint64 {
 
 	h += uint64(n)
 
-	i, end := 0, len(b)
+	for ; len(b) >= 8; b = b[8:] {
-	for ; i+8 <= end; i += 8 {
+		k1 := round(0, u64(b[:8]))
-		k1 := round(0, u64(b[i:i+8:len(b)]))
 		h ^= k1
 		h = rol27(h)*prime1 + prime4
 	}
-	if i+4 <= end {
+	if len(b) >= 4 {
-		h ^= uint64(u32(b[i:i+4:len(b)])) * prime1
+		h ^= uint64(u32(b[:4])) * prime1
 		h = rol23(h)*prime2 + prime3
-		i += 4
+		b = b[4:]
 	}
-	for ; i < end; i++ {
+	for ; len(b) > 0; b = b[1:] {
-		h ^= uint64(b[i]) * prime5
+		h ^= uint64(b[0]) * prime5
 		h = rol11(h) * prime1
 	}
 

vendor/github.com/cespare/xxhash/v2/xxhash_safe.go

@@ -1,3 +1,4 @@
+//go:build appengine
 // +build appengine
 
 // This file contains the safe implementations of otherwise unsafe-using code.

vendor/github.com/cespare/xxhash/v2/xxhash_unsafe.go

@@ -1,3 +1,4 @@
+//go:build !appengine
 // +build !appengine
 
 // This file encapsulates usage of unsafe.
@@ -11,7 +12,7 @@ import (
 
 // In the future it's possible that compiler optimizations will make these
 // XxxString functions unnecessary by realizing that calls such as
-// Sum64([]byte(s)) don't need to copy s. See https://golang.org/issue/2205.
+// Sum64([]byte(s)) don't need to copy s. See https://go.dev/issue/2205.
 // If that happens, even if we keep these functions they can be replaced with
 // the trivial safe code.
 

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 {
@@ -147,8 +166,7 @@ func (c *counter) Write(out *dto.Metric) error {
 		exemplar = e.(*dto.Exemplar)
 	}
 	val := c.get()
-
+	return populateMetric(CounterValue, val, c.labelPairs, exemplar, out, c.createdTs)
-	return populateMetric(CounterValue, val, c.labelPairs, exemplar, out)
 }
 
 func (c *counter) updateExemplar(v float64, l Labels) {
@@ -174,19 +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
 		}),
 	}

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

@@ -37,35 +37,35 @@
 //
 //	type metrics struct {
 //		cpuTemp  prometheus.Gauge
-//	  hdFailures *prometheus.CounterVec
+//		hdFailures *prometheus.CounterVec
 //	}
 //
 //	func NewMetrics(reg prometheus.Registerer) *metrics {
-//	  m := &metrics{
+//		m := &metrics{
-//	    cpuTemp: prometheus.NewGauge(prometheus.GaugeOpts{
+//			cpuTemp: prometheus.NewGauge(prometheus.GaugeOpts{
-//	      Name: "cpu_temperature_celsius",
+//				Name: "cpu_temperature_celsius",
-//	      Help: "Current temperature of the CPU.",
+//				Help: "Current temperature of the CPU.",
-//	    }),
+//			}),
-//	    hdFailures: prometheus.NewCounterVec(
+//			hdFailures: prometheus.NewCounterVec(
-//	      prometheus.CounterOpts{
+//				prometheus.CounterOpts{
-//	        Name: "hd_errors_total",
+//					Name: "hd_errors_total",
-//	        Help: "Number of hard-disk errors.",
+//					Help: "Number of hard-disk errors.",
-//	      },
+//				},
-//	      []string{"device"},
+//				[]string{"device"},
-//	    ),
+//			),
-//	  }
+//		}
-//	  reg.MustRegister(m.cpuTemp)
+//		reg.MustRegister(m.cpuTemp)
-//	  reg.MustRegister(m.hdFailures)
+//		reg.MustRegister(m.hdFailures)
-//	  return m
+//		return m
 //	}
 //
 //	func main() {
-//	  // Create a non-global registry.
+//		// Create a non-global registry.
-//	  reg := prometheus.NewRegistry()
+//		reg := prometheus.NewRegistry()
 //
-//	  // Create new metrics and register them using the custom registry.
+//		// Create new metrics and register them using the custom registry.
-//	  m := NewMetrics(reg)
+//		m := NewMetrics(reg)
-//	  // Set values for the new created metrics.
+//		// Set values for the new created metrics.
 //		m.cpuTemp.Set(65.3)
 //		m.hdFailures.With(prometheus.Labels{"device":"/dev/sda"}).Inc()
 //

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.

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/histogram.go

@@ -22,10 +22,10 @@ import (
 	"sync/atomic"
 	"time"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-
 	dto "github.com/prometheus/client_model/go"
+
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 // nativeHistogramBounds for the frac of observed values. Only relevant for
@@ -392,7 +392,7 @@ type HistogramOpts struct {
 	// zero, it is replaced by default buckets. The default buckets are
 	// DefBuckets if no buckets for a native histogram (see below) are used,
 	// otherwise the default is no buckets. (In other words, if you want to
-	// use both reguler buckets and buckets for a native histogram, you have
+	// use both regular buckets and buckets for a native histogram, you have
 	// to define the regular buckets here explicitly.)
 	Buckets []float64
 
@@ -402,7 +402,7 @@ type HistogramOpts struct {
 	// Histogram by a Prometheus server with that feature enabled (requires
 	// Prometheus v2.40+). Sparse buckets are exponential buckets covering
 	// the whole float64 range (with the exception of the “zero” bucket, see
-	// SparseBucketsZeroThreshold below). From any one bucket to the next,
+	// NativeHistogramZeroThreshold below). From any one bucket to the next,
 	// the width of the bucket grows by a constant
 	// factor. NativeHistogramBucketFactor provides an upper bound for this
 	// factor (exception see below). The smaller
@@ -414,8 +414,8 @@ type HistogramOpts struct {
 	// and 2, same as between 2 and 4, and 4 and 8, etc.).
 	//
 	// Details about the actually used factor: The factor is calculated as
-	// 2^(2^n), where n is an integer number between (and including) -8 and
+	// 2^(2^-n), where n is an integer number between (and including) -4 and
-	// 4. n is chosen so that the resulting factor is the largest that is
+	// 8. n is chosen so that the resulting factor is the largest that is
 	// still smaller or equal to NativeHistogramBucketFactor. Note that the
 	// smallest possible factor is therefore approx. 1.00271 (i.e. 2^(2^-8)
 	// ). If NativeHistogramBucketFactor is greater than 1 but smaller than
@@ -429,12 +429,12 @@ type HistogramOpts struct {
 	// a major version bump.
 	NativeHistogramBucketFactor float64
 	// All observations with an absolute value of less or equal
-	// NativeHistogramZeroThreshold are accumulated into a “zero”
+	// NativeHistogramZeroThreshold are accumulated into a “zero” bucket.
-	// bucket. For best results, this should be close to a bucket
+	// For best results, this should be close to a bucket boundary. This is
-	// boundary. This is usually the case if picking a power of two. If
+	// usually the case if picking a power of two. If
 	// NativeHistogramZeroThreshold is left at zero,
-	// DefSparseBucketsZeroThreshold is used as the threshold. To configure
+	// DefNativeHistogramZeroThreshold is used as the threshold. To
-	// a zero bucket with an actual threshold of zero (i.e. only
+	// configure a zero bucket with an actual threshold of zero (i.e. only
 	// observations of precisely zero will go into the zero bucket), set
 	// NativeHistogramZeroThreshold to the NativeHistogramZeroThresholdZero
 	// constant (or any negative float value).
@@ -447,26 +447,46 @@ type HistogramOpts struct {
 	// Histogram are sufficiently wide-spread. In particular, this could be
 	// used as a DoS attack vector. Where the observed values depend on
 	// external inputs, it is highly recommended to set a
-	// NativeHistogramMaxBucketNumber.)  Once the set
+	// NativeHistogramMaxBucketNumber.) Once the set
 	// NativeHistogramMaxBucketNumber is exceeded, the following strategy is
-	// enacted: First, if the last reset (or the creation) of the histogram
+	// enacted:
-	// is at least NativeHistogramMinResetDuration ago, then the whole
+	//  - First, if the last reset (or the creation) of the histogram is at
-	// histogram is reset to its initial state (including regular
+	//    least NativeHistogramMinResetDuration ago, then the whole
-	// buckets). If less time has passed, or if
+	//    histogram is reset to its initial state (including regular
-	// NativeHistogramMinResetDuration is zero, no reset is
+	//    buckets).
-	// performed. Instead, the zero threshold is increased sufficiently to
+	//  - If less time has passed, or if NativeHistogramMinResetDuration is
-	// reduce the number of buckets to or below
+	//    zero, no reset is performed. Instead, the zero threshold is
-	// NativeHistogramMaxBucketNumber, but not to more than
+	//    increased sufficiently to reduce the number of buckets to or below
-	// NativeHistogramMaxZeroThreshold. Thus, if
+	//    NativeHistogramMaxBucketNumber, but not to more than
-	// NativeHistogramMaxZeroThreshold is already at or below the current
+	//    NativeHistogramMaxZeroThreshold. Thus, if
-	// zero threshold, nothing happens at this step. After that, if the
+	//    NativeHistogramMaxZeroThreshold is already at or below the current
-	// number of buckets still exceeds NativeHistogramMaxBucketNumber, the
+	//    zero threshold, nothing happens at this step.
-	// resolution of the histogram is reduced by doubling the width of the
+	//  - After that, if the number of buckets still exceeds
-	// sparse buckets (up to a growth factor between one bucket to the next
+	//    NativeHistogramMaxBucketNumber, the resolution of the histogram is
-	// of 2^(2^4) = 65536, see above).
+	//    reduced by doubling the width of the sparse buckets (up to a
+	//    growth factor between one bucket to the next of 2^(2^4) = 65536,
+	//    see above).
+	//  - Any increased zero threshold or reduced resolution is reset back
+	//    to their original values once NativeHistogramMinResetDuration has
+	//    passed (since the last reset or the creation of the histogram).
 	NativeHistogramMaxBucketNumber  uint32
 	NativeHistogramMinResetDuration time.Duration
 	NativeHistogramMaxZeroThreshold float64
+
+	// now is for testing purposes, by default it's time.Now.
+	now func() time.Time
+}
+
+// HistogramVecOpts bundles the options to create a HistogramVec metric.
+// It is mandatory to set HistogramOpts, see there for mandatory fields. VariableLabels
+// is optional and can safely be left to its default value.
+type HistogramVecOpts struct {
+	HistogramOpts
+
+	// 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
 }
 
 // NewHistogram creates a new Histogram based on the provided HistogramOpts. It
@@ -488,11 +508,11 @@ func NewHistogram(opts HistogramOpts) Histogram {
 }
 
 func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogram {
-	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 == bucketLabel {
 			panic(errBucketLabelNotAllowed)
 		}
@@ -503,6 +523,10 @@ func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogr
 		}
 	}
 
+	if opts.now == nil {
+		opts.now = time.Now
+	}
+
 	h := &histogram{
 		desc:                            desc,
 		upperBounds:                     opts.Buckets,
@@ -510,8 +534,8 @@ func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogr
 		nativeHistogramMaxBuckets:       opts.NativeHistogramMaxBucketNumber,
 		nativeHistogramMaxZeroThreshold: opts.NativeHistogramMaxZeroThreshold,
 		nativeHistogramMinResetDuration: opts.NativeHistogramMinResetDuration,
-		lastResetTime:                   time.Now(),
+		lastResetTime:                   opts.now(),
-		now:                             time.Now,
+		now:                             opts.now,
 	}
 	if len(h.upperBounds) == 0 && opts.NativeHistogramBucketFactor <= 1 {
 		h.upperBounds = DefBuckets
@@ -544,16 +568,12 @@ func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogr
 	}
 	// Finally we know the final length of h.upperBounds and can make buckets
 	// for both counts as well as exemplars:
-	h.counts[0] = &histogramCounts{
+	h.counts[0] = &histogramCounts{buckets: make([]uint64, len(h.upperBounds))}
-		buckets:                          make([]uint64, len(h.upperBounds)),
+	atomic.StoreUint64(&h.counts[0].nativeHistogramZeroThresholdBits, math.Float64bits(h.nativeHistogramZeroThreshold))
-		nativeHistogramZeroThresholdBits: math.Float64bits(h.nativeHistogramZeroThreshold),
+	atomic.StoreInt32(&h.counts[0].nativeHistogramSchema, h.nativeHistogramSchema)
-		nativeHistogramSchema:            h.nativeHistogramSchema,
+	h.counts[1] = &histogramCounts{buckets: make([]uint64, len(h.upperBounds))}
-	}
+	atomic.StoreUint64(&h.counts[1].nativeHistogramZeroThresholdBits, math.Float64bits(h.nativeHistogramZeroThreshold))
-	h.counts[1] = &histogramCounts{
+	atomic.StoreInt32(&h.counts[1].nativeHistogramSchema, h.nativeHistogramSchema)
-		buckets:                          make([]uint64, len(h.upperBounds)),
-		nativeHistogramZeroThresholdBits: math.Float64bits(h.nativeHistogramZeroThreshold),
-		nativeHistogramSchema:            h.nativeHistogramSchema,
-	}
 	h.exemplars = make([]atomic.Value, len(h.upperBounds)+1)
 
 	h.init(h) // Init self-collection.
@@ -632,8 +652,8 @@ func (hc *histogramCounts) observe(v float64, bucket int, doSparse bool) {
 			if frac == 0.5 {
 				key--
 			}
-			div := 1 << -schema
+			offset := (1 << -schema) - 1
-			key = (key + div - 1) / div
+			key = (key + offset) >> -schema
 		}
 		if isInf {
 			key++
@@ -694,9 +714,11 @@ type histogram struct {
 	nativeHistogramMaxZeroThreshold float64
 	nativeHistogramMaxBuckets       uint32
 	nativeHistogramMinResetDuration time.Duration
-	lastResetTime                   time.Time // Protected by mtx.
+	// lastResetTime is protected by mtx. It is also used as created timestamp.
+	lastResetTime time.Time
 
-	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 (h *histogram) Desc() *Desc {
@@ -735,9 +757,10 @@ func (h *histogram) Write(out *dto.Metric) error {
 	waitForCooldown(count, coldCounts)
 
 	his := &dto.Histogram{
-		Bucket:      make([]*dto.Bucket, len(h.upperBounds)),
+		Bucket:           make([]*dto.Bucket, len(h.upperBounds)),
-		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: timestamppb.New(h.lastResetTime),
 	}
 	out.Histogram = his
 	out.Label = h.labelPairs
@@ -775,6 +798,16 @@ func (h *histogram) Write(out *dto.Metric) error {
 		his.ZeroCount = proto.Uint64(zeroBucket)
 		his.NegativeSpan, his.NegativeDelta = makeBuckets(&coldCounts.nativeHistogramBucketsNegative)
 		his.PositiveSpan, his.PositiveDelta = makeBuckets(&coldCounts.nativeHistogramBucketsPositive)
+
+		// Add a no-op span to a histogram without observations and with
+		// a zero threshold of zero. Otherwise, a native histogram would
+		// look like a classic histogram to scrapers.
+		if *his.ZeroThreshold == 0 && *his.ZeroCount == 0 && len(his.PositiveSpan) == 0 && len(his.NegativeSpan) == 0 {
+			his.PositiveSpan = []*dto.BucketSpan{{
+				Offset: proto.Int32(0),
+				Length: proto.Uint32(0),
+			}}
+		}
 	}
 	addAndResetCounts(hotCounts, coldCounts)
 	return nil
@@ -810,7 +843,7 @@ func (h *histogram) observe(v float64, bucket int) {
 	}
 }
 
-// limitSparsebuckets applies a strategy to limit the number of populated sparse
+// limitBuckets applies a strategy to limit the number of populated sparse
 // buckets. It's generally best effort, and there are situations where the
 // number can go higher (if even the lowest resolution isn't enough to reduce
 // the number sufficiently, or if the provided counts aren't fully updated yet
@@ -847,20 +880,23 @@ func (h *histogram) limitBuckets(counts *histogramCounts, value float64, bucket
 	h.doubleBucketWidth(hotCounts, coldCounts)
 }
 
-// maybeReset resests the whole histogram if at least h.nativeHistogramMinResetDuration
+// maybeReset resets the whole histogram if at least h.nativeHistogramMinResetDuration
 // has been passed. It returns true if the histogram has been reset. The caller
 // must have locked h.mtx.
-func (h *histogram) maybeReset(hot, cold *histogramCounts, coldIdx uint64, value float64, bucket int) bool {
+func (h *histogram) maybeReset(
+	hot, cold *histogramCounts, coldIdx uint64, value float64, bucket int,
+) bool {
 	// We are using the possibly mocked h.now() rather than
 	// time.Since(h.lastResetTime) to enable testing.
-	if h.nativeHistogramMinResetDuration == 0 || h.now().Sub(h.lastResetTime) < h.nativeHistogramMinResetDuration {
+	if h.nativeHistogramMinResetDuration == 0 ||
+		h.now().Sub(h.lastResetTime) < h.nativeHistogramMinResetDuration {
 		return false
 	}
 	// Completely reset coldCounts.
 	h.resetCounts(cold)
 	// Repeat the latest observation to not lose it completely.
 	cold.observe(value, bucket, true)
-	// Make coldCounts the new hot counts while ressetting countAndHotIdx.
+	// Make coldCounts the new hot counts while resetting countAndHotIdx.
 	n := atomic.SwapUint64(&h.countAndHotIdx, (coldIdx<<63)+1)
 	count := n & ((1 << 63) - 1)
 	waitForCooldown(count, hot)
@@ -1034,15 +1070,23 @@ type HistogramVec struct {
 // NewHistogramVec creates a new HistogramVec based on the provided HistogramOpts and
 // partitioned by the given label names.
 func NewHistogramVec(opts HistogramOpts, labelNames []string) *HistogramVec {
-	desc := NewDesc(
+	return V2.NewHistogramVec(HistogramVecOpts{
+		HistogramOpts:  opts,
+		VariableLabels: UnconstrainedLabels(labelNames),
+	})
+}
+
+// NewHistogramVec creates a new HistogramVec based on the provided HistogramVecOpts.
+func (v2) NewHistogramVec(opts HistogramVecOpts) *HistogramVec {
+	desc := V2.NewDesc(
 		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
 		opts.Help,
-		labelNames,
+		opts.VariableLabels,
 		opts.ConstLabels,
 	)
 	return &HistogramVec{
 		MetricVec: NewMetricVec(desc, func(lvs ...string) Metric {
-			return newHistogram(desc, opts, lvs...)
+			return newHistogram(desc, opts.HistogramOpts, lvs...)
 		}),
 	}
 }
@@ -1161,6 +1205,7 @@ type constHistogram struct {
 	sum        float64
 	buckets    map[float64]uint64
 	labelPairs []*dto.LabelPair
+	createdTs  *timestamppb.Timestamp
 }
 
 func (h *constHistogram) Desc() *Desc {
@@ -1168,7 +1213,9 @@ func (h *constHistogram) Desc() *Desc {
 }
 
 func (h *constHistogram) Write(out *dto.Metric) error {
-	his := &dto.Histogram{}
+	his := &dto.Histogram{
+		CreatedTimestamp: h.createdTs,
+	}
 
 	buckets := make([]*dto.Bucket, 0, len(h.buckets))
 
@@ -1215,7 +1262,7 @@ func NewConstHistogram(
 	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 &constHistogram{
@@ -1309,7 +1356,7 @@ func makeBuckets(buckets *sync.Map) ([]*dto.BucketSpan, []int64) {
 		// Multiple spans with only small gaps in between are probably
 		// encoded more efficiently as one larger span with a few empty
 		// buckets. Needs some research to find the sweet spot. For now,
-		// we assume that gaps of one ore two buckets should not create
+		// we assume that gaps of one or two buckets should not create
 		// a new span.
 		iDelta := int32(i - nextI)
 		if n == 0 || iDelta > 2 {

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 (

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

@@ -32,6 +32,104 @@ import (
 // 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 = "__"

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

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

@@ -17,7 +17,7 @@
 // constructors register the Collectors with a registry before returning them.
 // There are two sets of constructors. The constructors in the first set are
 // top-level functions, while the constructors in the other set are methods of
-// the Factory type. The top-level function return Collectors registered with
+// the Factory type. The top-level functions return Collectors registered with
 // the global registry (prometheus.DefaultRegisterer), while the methods return
 // Collectors registered with the registry the Factory was constructed with. All
 // constructors panic if the registration fails.
@@ -28,30 +28,30 @@
 //	package main
 //
 //	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{
-//	        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() {
-//	        for {
+//		for {
-//	                histogram.Observe(rand.NormFloat64())
+//			histogram.Observe(rand.NormFloat64())
-//	        }
+//		}
 //	}
 //
 //	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:
@@ -85,7 +85,7 @@
 //	}
 //
 // 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 (
@@ -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

@@ -68,16 +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 {
-			addWithExemplar(
+			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()))
 		}
 		return resp, err
 	}
@@ -110,17 +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 {
-			observeWithExemplar(
+			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

@@ -87,7 +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) {
@@ -95,23 +96,22 @@ func InstrumentHandlerDuration(obs prometheus.ObserverVec, next http.Handler, op
 			d := newDelegator(w, nil)
 			next.ServeHTTP(d, r)
 
-			observeWithExemplar(
+			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...)
-		observeWithExemplar(
+		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()))
-		)
 	}
 }
 
@@ -138,28 +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)
 
-			addWithExemplar(
+			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)
-		addWithExemplar(
+
-			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()))
 	}
 }
 
@@ -191,16 +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) {
-			observeWithExemplar(
+			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)
 	}
@@ -231,28 +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)
-			observeWithExemplar(
+
-				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)
-		observeWithExemplar(
+
-			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()))
 	}
 }
 
@@ -281,16 +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)
-		observeWithExemplar(
+
-			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()))
 	})
 }
 
@@ -380,16 +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 (
@@ -549,7 +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 {
@@ -933,6 +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(
@@ -960,7 +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...)
 		}),
 	}
 }
@@ -662,6 +697,7 @@ type constSummary struct {
 	sum        float64
 	quantiles  map[float64]float64
 	labelPairs []*dto.LabelPair
+	createdTs  *timestamppb.Timestamp
 }
 
 func (s *constSummary) Desc() *Desc {
@@ -669,7 +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)
@@ -718,7 +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

@@ -23,7 +23,9 @@ 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() {
@@ -31,6 +33,14 @@ type Timer struct {
 //	    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(),
@@ -53,3 +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

@@ -115,32 +115,31 @@ 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 +18,9 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/golang/protobuf/proto" //nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
 	"github.com/matttproud/golang_protobuf_extensions/pbutil"
 	"github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg"
+	"google.golang.org/protobuf/encoding/prototext"
 
 	dto "github.com/prometheus/client_model/go"
 )
@@ -99,8 +99,11 @@ func NegotiateIncludingOpenMetrics(h http.Header) Format {
 		if ac.Type == "text" && ac.SubType == "plain" && (ver == TextVersion || ver == "") {
 			return FmtText
 		}
-		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
+			if ver == OpenMetricsVersion_1_0_0 {
+				return FmtOpenMetrics_1_0_0
+			}
+			return FmtOpenMetrics_0_0_1
 		}
 	}
 	return FmtText
@@ -133,7 +136,7 @@ func NewEncoder(w io.Writer, format Format) Encoder {
 	case FmtProtoText:
 		return encoderCloser{
 			encode: func(v *dto.MetricFamily) error {
-				_, err := fmt.Fprintln(w, proto.MarshalTextString(v))
+				_, err := fmt.Fprintln(w, prototext.Format(v))
 				return err
 			},
 			close: func() error { return nil },
@@ -146,7 +149,7 @@ func NewEncoder(w io.Writer, format Format) Encoder {
 			},
 			close: func() error { return nil },
 		}
-	case FmtOpenMetrics:
+	case FmtOpenMetrics_0_0_1, FmtOpenMetrics_1_0_0:
 		return encoderCloser{
 			encode: func(v *dto.MetricFamily) error {
 				_, err := MetricFamilyToOpenMetrics(w, v)

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

@@ -19,20 +19,22 @@ type Format string
 
 // Constants to assemble the Content-Type values for the different wire protocols.
 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.
-	FmtUnknown      Format = `<unknown>`
+	FmtUnknown           Format = `<unknown>`
-	FmtText         Format = `text/plain; version=` + TextVersion + `; charset=utf-8`
+	FmtText              Format = `text/plain; version=` + TextVersion + `; charset=utf-8`
-	FmtProtoDelim   Format = ProtoFmt + ` encoding=delimited`
+	FmtProtoDelim        Format = ProtoFmt + ` encoding=delimited`
-	FmtProtoText    Format = ProtoFmt + ` encoding=text`
+	FmtProtoText         Format = ProtoFmt + ` encoding=text`
-	FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text`
+	FmtProtoCompact      Format = ProtoFmt + ` encoding=compact-text`
-	FmtOpenMetrics  Format = OpenMetricsType + `; version=` + OpenMetricsVersion + `; charset=utf-8`
+	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 (

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

@@ -46,20 +46,20 @@ 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 == "" {

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{

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

@@ -24,8 +24,8 @@ import (
 
 	dto "github.com/prometheus/client_model/go"
 
-	"github.com/golang/protobuf/proto" //nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
 	"github.com/prometheus/common/model"
+	"google.golang.org/protobuf/proto"
 )
 
 // A stateFn is a function that represents a state in a state machine. By
@@ -142,9 +142,13 @@ 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 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/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

@@ -16,20 +16,12 @@ package model
 import (
 	"encoding/json"
 	"fmt"
-	"math"
 	"sort"
 	"strconv"
 	"strings"
 )
 
 var (
-	// 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.
-	ZeroSamplePair = SamplePair{Timestamp: Earliest}
-
 	// ZeroSample is the pseudo zero-value of Sample used to signal a
 	// non-existing sample. It is a Sample with timestamp Earliest, value 0.0,
 	// and metric nil. Note that the natural zero value of Sample has a timestamp
@@ -38,82 +30,14 @@ var (
 	ZeroSample = Sample{Timestamp: Earliest}
 )
 
-// A SampleValue is a representation of a value for a given sample at a given
+// Sample is a sample pair associated with a metric. A single sample must either
-// time.
+// define Value or Histogram but not both. Histogram == nil implies the Value
-type SampleValue float64
+// field is used, otherwise it should be ignored.
-
-// 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 +53,19 @@ 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 +74,19 @@ 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 +97,25 @@ 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 +123,13 @@ 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 +175,76 @@ 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.

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

@@ -0,0 +1,100 @@
+// 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"
+)
+
+var (
+	// 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.
+	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 ?= v1.53.3
 # 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 netbsd || openbsd || solaris || windows || nostatfs
+// +build netbsd openbsd solaris windows nostatfs
+
+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 !netbsd && !openbsd && !solaris && !windows && !nostatfs
+// +build !netbsd,!openbsd,!solaris,!windows,!nostatfs
+
+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

@@ -186,6 +186,8 @@ 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
 }
@@ -264,7 +266,7 @@ 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 +286,11 @@ 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 +308,7 @@ 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 +345,7 @@ 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 +360,7 @@ 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 +371,7 @@ 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 +381,7 @@ 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 +391,7 @@ 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 +430,7 @@ 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 +459,7 @@ 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 +523,7 @@ 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 +536,6 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) {
 
 			ns = append(ns, n)
 		}
-
 		opStats := NFSOperationStats{
 			Operation:                           strings.TrimSuffix(ss[0], ":"),
 			Requests:                            ns[0],
@@ -545,6 +547,9 @@ 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 +576,10 @@ 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
@@ -583,13 +588,13 @@ func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats
 		} else if protocol == "udp" {
 			expectedLength = fieldTransport11UDPLen
 		} 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 {
-			return nil, fmt.Errorf("invalid NFS transport stats 1.1 statement: %v", ss)
+			return nil, fmt.Errorf("%w: invalid NFS transport stats 1.1 statement: %v", ErrFileParse, ss)
 		}
 	default:
-		return nil, fmt.Errorf("unrecognized NFS transport stats version: %q", statVersion)
+		return nil, fmt.Errorf("%s: Unrecognized NFS transport stats version: %q", ErrFileParse, statVersion)
 	}
 
 	// Allocate enough for v1.1 stats since zero value for v1.1 stats will be okay

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

@@ -111,7 +111,7 @@ 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

@@ -65,7 +65,7 @@ type ProcMap struct {
 func parseDevice(s string) (uint64, error) {
 	toks := strings.Split(s, ":")
 	if len(toks) < 2 {
-		return 0, fmt.Errorf("unexpected number of fields")
+		return 0, fmt.Errorf("%w: unexpected number of fields, expected: 2, got: %q", ErrFileParse, len(toks))
 	}
 
 	major, err := strconv.ParseUint(toks[0], 16, 0)
@@ -95,7 +95,7 @@ func parseAddress(s string) (uintptr, error) {
 func parseAddresses(s string) (uintptr, uintptr, error) {
 	toks := strings.Split(s, "-")
 	if len(toks) < 2 {
-		return 0, 0, fmt.Errorf("invalid address")
+		return 0, 0, fmt.Errorf("%w: invalid address", ErrFileParse)
 	}
 
 	saddr, err := parseAddress(toks[0])
@@ -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"
 
@@ -76,6 +77,9 @@ 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 +100,10 @@ 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
@@ -161,10 +165,38 @@ 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
+}

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]}

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

@@ -57,7 +57,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 	)
 
 	if !scanner.Scan() {
-		return Softirqs{}, fmt.Errorf("softirqs empty")
+		return Softirqs{}, fmt.Errorf("%w: softirqs empty", ErrFileRead)
 	}
 
 	for scanner.Scan() {
@@ -74,7 +74,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.Hi = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.Hi[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (HI%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (HI%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "TIMER:":
@@ -82,7 +82,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.Timer = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.Timer[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (TIMER%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (TIMER%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "NET_TX:":
@@ -90,7 +90,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.NetTx = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.NetTx[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (NET_TX%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (NET_TX%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "NET_RX:":
@@ -98,7 +98,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.NetRx = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.NetRx[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (NET_RX%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (NET_RX%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "BLOCK:":
@@ -106,7 +106,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.Block = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.Block[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (BLOCK%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (BLOCK%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "IRQ_POLL:":
@@ -114,7 +114,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.IRQPoll = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.IRQPoll[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (IRQ_POLL%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (IRQ_POLL%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "TASKLET:":
@@ -122,7 +122,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.Tasklet = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.Tasklet[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (TASKLET%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (TASKLET%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "SCHED:":
@@ -130,7 +130,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.Sched = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.Sched[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (SCHED%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (SCHED%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "HRTIMER:":
@@ -138,7 +138,7 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.HRTimer = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.HRTimer[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (HRTIMER%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (HRTIMER%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "RCU:":
@@ -146,14 +146,14 @@ func parseSoftirqs(r io.Reader) (Softirqs, error) {
 			softirqs.RCU = make([]uint64, len(perCPU))
 			for i, count := range perCPU {
 				if softirqs.RCU[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Softirqs{}, fmt.Errorf("couldn't parse %q (RCU%d): %w", count, i, err)
+					return Softirqs{}, fmt.Errorf("%s: couldn't parse %q (RCU%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		}
 	}
 
 	if err := scanner.Err(); err != nil {
-		return Softirqs{}, fmt.Errorf("couldn't parse softirqs: %w", err)
+		return Softirqs{}, fmt.Errorf("%s: couldn't parse softirqs: %w", ErrFileParse, err)
 	}
 
 	return softirqs, scanner.Err()

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

@@ -62,7 +62,7 @@ type Stat struct {
 	// Summed up cpu statistics.
 	CPUTotal CPUStat
 	// Per-CPU statistics.
-	CPU []CPUStat
+	CPU map[int64]CPUStat
 	// Number of times interrupts were handled, which contains numbered and unnumbered IRQs.
 	IRQTotal uint64
 	// Number of times a numbered IRQ was triggered.
@@ -93,10 +93,10 @@ func parseCPUStat(line string) (CPUStat, int64, error) {
 		&cpuStat.Guest, &cpuStat.GuestNice)
 
 	if err != nil && err != io.EOF {
-		return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu): %w", line, err)
+		return CPUStat{}, -1, fmt.Errorf("%s: couldn't parse %q (cpu): %w", ErrFileParse, line, err)
 	}
 	if count == 0 {
-		return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu): 0 elements parsed", line)
+		return CPUStat{}, -1, fmt.Errorf("%w: couldn't parse %q (cpu): 0 elements parsed", ErrFileParse, line)
 	}
 
 	cpuStat.User /= userHZ
@@ -116,7 +116,7 @@ func parseCPUStat(line string) (CPUStat, int64, error) {
 
 	cpuID, err := strconv.ParseInt(cpu[3:], 10, 64)
 	if err != nil {
-		return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu/cpuid): %w", line, err)
+		return CPUStat{}, -1, fmt.Errorf("%s: couldn't parse %q (cpu/cpuid): %w", ErrFileParse, line, err)
 	}
 
 	return cpuStat, cpuID, nil
@@ -136,7 +136,7 @@ func parseSoftIRQStat(line string) (SoftIRQStat, uint64, error) {
 		&softIRQStat.Hrtimer, &softIRQStat.Rcu)
 
 	if err != nil {
-		return SoftIRQStat{}, 0, fmt.Errorf("couldn't parse %q (softirq): %w", line, err)
+		return SoftIRQStat{}, 0, fmt.Errorf("%s: couldn't parse %q (softirq): %w", ErrFileParse, line, err)
 	}
 
 	return softIRQStat, total, nil
@@ -170,10 +170,27 @@ func (fs FS) Stat() (Stat, error) {
 	if err != nil {
 		return Stat{}, err
 	}
+	procStat, err := parseStat(bytes.NewReader(data), fileName)
+	if err != nil {
+		return Stat{}, err
+	}
+	return procStat, nil
+}
 
-	stat := Stat{}
+// parseStat parses the metrics from /proc/[pid]/stat.
+func parseStat(r io.Reader, fileName string) (Stat, error) {
+	var (
+		scanner = bufio.NewScanner(r)
+		stat    = Stat{
+			CPU: make(map[int64]CPUStat),
+		}
+		err error
+	)
+
+	// Increase default scanner buffer to handle very long `intr` lines.
+	buf := make([]byte, 0, 8*1024)
+	scanner.Buffer(buf, 1024*1024)
 
-	scanner := bufio.NewScanner(bytes.NewReader(data))
 	for scanner.Scan() {
 		line := scanner.Text()
 		parts := strings.Fields(scanner.Text())
@@ -184,34 +201,34 @@ func (fs FS) Stat() (Stat, error) {
 		switch {
 		case parts[0] == "btime":
 			if stat.BootTime, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
-				return Stat{}, fmt.Errorf("couldn't parse %q (btime): %w", parts[1], err)
+				return Stat{}, fmt.Errorf("%s: couldn't parse %q (btime): %w", ErrFileParse, parts[1], err)
 			}
 		case parts[0] == "intr":
 			if stat.IRQTotal, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
-				return Stat{}, fmt.Errorf("couldn't parse %q (intr): %w", parts[1], err)
+				return Stat{}, fmt.Errorf("%s: couldn't parse %q (intr): %w", ErrFileParse, parts[1], err)
 			}
 			numberedIRQs := parts[2:]
 			stat.IRQ = make([]uint64, len(numberedIRQs))
 			for i, count := range numberedIRQs {
 				if stat.IRQ[i], err = strconv.ParseUint(count, 10, 64); err != nil {
-					return Stat{}, fmt.Errorf("couldn't parse %q (intr%d): %w", count, i, err)
+					return Stat{}, fmt.Errorf("%s: couldn't parse %q (intr%d): %w", ErrFileParse, count, i, err)
 				}
 			}
 		case parts[0] == "ctxt":
 			if stat.ContextSwitches, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
-				return Stat{}, fmt.Errorf("couldn't parse %q (ctxt): %w", parts[1], err)
+				return Stat{}, fmt.Errorf("%s: couldn't parse %q (ctxt): %w", ErrFileParse, parts[1], err)
 			}
 		case parts[0] == "processes":
 			if stat.ProcessCreated, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
-				return Stat{}, fmt.Errorf("couldn't parse %q (processes): %w", parts[1], err)
+				return Stat{}, fmt.Errorf("%s: couldn't parse %q (processes): %w", ErrFileParse, parts[1], err)
 			}
 		case parts[0] == "procs_running":
 			if stat.ProcessesRunning, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
-				return Stat{}, fmt.Errorf("couldn't parse %q (procs_running): %w", parts[1], err)
+				return Stat{}, fmt.Errorf("%s: couldn't parse %q (procs_running): %w", ErrFileParse, parts[1], err)
 			}
 		case parts[0] == "procs_blocked":
 			if stat.ProcessesBlocked, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
-				return Stat{}, fmt.Errorf("couldn't parse %q (procs_blocked): %w", parts[1], err)
+				return Stat{}, fmt.Errorf("%s: couldn't parse %q (procs_blocked): %w", ErrFileParse, parts[1], err)
 			}
 		case parts[0] == "softirq":
 			softIRQStats, total, err := parseSoftIRQStat(line)
@@ -228,16 +245,13 @@ func (fs FS) Stat() (Stat, error) {
 			if cpuID == -1 {
 				stat.CPUTotal = cpuStat
 			} else {
-				for int64(len(stat.CPU)) <= cpuID {
-					stat.CPU = append(stat.CPU, CPUStat{})
-				}
 				stat.CPU[cpuID] = cpuStat
 			}
 		}
 	}
 
 	if err := scanner.Err(); err != nil {
-		return Stat{}, fmt.Errorf("couldn't parse %q: %w", fileName, err)
+		return Stat{}, fmt.Errorf("%s: couldn't parse %q: %w", ErrFileParse, fileName, err)
 	}
 
 	return stat, nil

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

@@ -64,7 +64,7 @@ func parseSwapString(swapString string) (*Swap, error) {
 	swapFields := strings.Fields(swapString)
 	swapLength := len(swapFields)
 	if swapLength < 5 {
-		return nil, fmt.Errorf("too few fields in swap string: %s", swapString)
+		return nil, fmt.Errorf("%w: too few fields in swap string: %s", ErrFileParse, swapString)
 	}
 
 	swap := &Swap{
@@ -74,15 +74,15 @@ func parseSwapString(swapString string) (*Swap, error) {
 
 	swap.Size, err = strconv.Atoi(swapFields[2])
 	if err != nil {
-		return nil, fmt.Errorf("invalid swap size: %s", swapFields[2])
+		return nil, fmt.Errorf("%s: invalid swap size: %s: %w", ErrFileParse, swapFields[2], err)
 	}
 	swap.Used, err = strconv.Atoi(swapFields[3])
 	if err != nil {
-		return nil, fmt.Errorf("invalid swap used: %s", swapFields[3])
+		return nil, fmt.Errorf("%s: invalid swap used: %s: %w", ErrFileParse, swapFields[3], err)
 	}
 	swap.Priority, err = strconv.Atoi(swapFields[4])
 	if err != nil {
-		return nil, fmt.Errorf("invalid swap priority: %s", swapFields[4])
+		return nil, fmt.Errorf("%s: invalid swap priority: %s: %w", ErrFileParse, swapFields[4], err)
 	}
 
 	return swap, nil

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

@@ -0,0 +1,80 @@
+// 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 (
+	"fmt"
+	"os"
+	"strconv"
+
+	fsi "github.com/prometheus/procfs/internal/fs"
+)
+
+// Provide access to /proc/PID/task/TID files, for thread specific values. Since
+// such files have the same structure as /proc/PID/ ones, the data structures
+// and the parsers for the latter may be reused.
+
+// AllThreads returns a list of all currently available threads under /proc/PID.
+func AllThreads(pid int) (Procs, error) {
+	fs, err := NewFS(DefaultMountPoint)
+	if err != nil {
+		return Procs{}, err
+	}
+	return fs.AllThreads(pid)
+}
+
+// AllThreads returns a list of all currently available threads for PID.
+func (fs FS) AllThreads(pid int) (Procs, error) {
+	taskPath := fs.proc.Path(strconv.Itoa(pid), "task")
+	d, err := os.Open(taskPath)
+	if err != nil {
+		return Procs{}, err
+	}
+	defer d.Close()
+
+	names, err := d.Readdirnames(-1)
+	if err != nil {
+		return Procs{}, fmt.Errorf("%s: could not read %q: %w", ErrFileRead, d.Name(), err)
+	}
+
+	t := Procs{}
+	for _, n := range names {
+		tid, err := strconv.ParseInt(n, 10, 64)
+		if err != nil {
+			continue
+		}
+
+		t = append(t, Proc{PID: int(tid), fs: FS{fsi.FS(taskPath), fs.isReal}})
+	}
+
+	return t, nil
+}
+
+// Thread returns a process for a given PID, TID.
+func (fs FS) Thread(pid, tid int) (Proc, error) {
+	taskPath := fs.proc.Path(strconv.Itoa(pid), "task")
+	if _, err := os.Stat(taskPath); err != nil {
+		return Proc{}, err
+	}
+	return Proc{PID: tid, fs: FS{fsi.FS(taskPath), fs.isReal}}, nil
+}
+
+// Thread returns a process for a given TID of Proc.
+func (proc Proc) Thread(tid int) (Proc, error) {
+	tfs := FS{fsi.FS(proc.path("task")), proc.fs.isReal}
+	if _, err := os.Stat(tfs.proc.Path(strconv.Itoa(tid))); err != nil {
+		return Proc{}, err
+	}
+	return Proc{PID: tid, fs: tfs}, nil
+}