Update dependencies

vendor/github.com/prometheus/procfs/Makefile

@@ -18,6 +18,8 @@ include Makefile.common
 	./ttar -C $(dir $*) -x -f $*.ttar
 	touch $@
 
+fixtures: fixtures/.unpacked
+
 update_fixtures:
 	rm -vf fixtures/.unpacked
 	./ttar -c -f fixtures.ttar fixtures/

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

@@ -78,12 +78,12 @@ ifneq ($(shell which gotestsum),)
 endif
 endif
 
-PROMU_VERSION ?= 0.5.0
+PROMU_VERSION ?= 0.12.0
 PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
 
 GOLANGCI_LINT :=
 GOLANGCI_LINT_OPTS ?=
-GOLANGCI_LINT_VERSION ?= v1.18.0
+GOLANGCI_LINT_VERSION ?= v1.39.0
 # 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))
@@ -118,7 +118,7 @@ endif
 %: common-% ;
 
 .PHONY: common-all
-common-all: precheck style check_license lint unused build test
+common-all: precheck style check_license lint yamllint unused build test
 
 .PHONY: common-style
 common-style:
@@ -198,6 +198,15 @@ else
 endif
 endif
 
+.PHONY: common-yamllint
+common-yamllint:
+	@echo ">> running yamllint on all YAML files in the repository"
+ifeq (, $(shell which yamllint))
+	@echo "yamllint not installed so skipping"
+else
+	yamllint .
+endif
+
 # For backward-compatibility.
 .PHONY: common-staticcheck
 common-staticcheck: lint
@@ -245,10 +254,12 @@ common-docker-publish: $(PUBLISH_DOCKER_ARCHS)
 $(PUBLISH_DOCKER_ARCHS): common-docker-publish-%:
 	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(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-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)"
 
 .PHONY: common-docker-manifest
 common-docker-manifest:

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

@@ -6,8 +6,8 @@ metrics from the pseudo-filesystems /proc and /sys.
 *WARNING*: This package is a work in progress. Its API may still break in
 backwards-incompatible ways without warnings. Use it at your own risk.
 
-[![GoDoc](https://godoc.org/github.com/prometheus/procfs?status.png)](https://godoc.org/github.com/prometheus/procfs)
-[![Build Status](https://travis-ci.org/prometheus/procfs.svg?branch=master)](https://travis-ci.org/prometheus/procfs)
+[![Go Reference](https://pkg.go.dev/badge/github.com/prometheus/procfs.svg)](https://pkg.go.dev/github.com/prometheus/procfs)
+[![CircleCI](https://circleci.com/gh/prometheus/procfs/tree/master.svg?style=svg)](https://circleci.com/gh/prometheus/procfs/tree/master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/prometheus/procfs)](https://goreportcard.com/report/github.com/prometheus/procfs)
 
 ## Usage

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

@@ -0,0 +1,6 @@
+# Reporting a security issue
+
+The Prometheus security policy, including how to report vulnerabilities, can be
+found here:
+
+https://prometheus.io/docs/operating/security/

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

@@ -36,7 +36,7 @@ type ARPEntry struct {
 func (fs FS) GatherARPEntries() ([]ARPEntry, error) {
 	data, err := ioutil.ReadFile(fs.proc.Path("net/arp"))
 	if err != nil {
-		return nil, fmt.Errorf("error reading arp %s: %s", fs.proc.Path("net/arp"), err)
+		return nil, fmt.Errorf("error reading arp %q: %w", fs.proc.Path("net/arp"), err)
 	}
 
 	return parseARPEntries(data)
@@ -59,7 +59,7 @@ 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: %s", err)
+				return []ARPEntry{}, fmt.Errorf("failed to parse ARP entry: %w", err)
 			}
 			entries = append(entries, entry)
 		} else {

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

@@ -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: %s", err)
+				return nil, fmt.Errorf("invalid value in buddyinfo: %w", err)
 			}
 		}
 

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

@@ -0,0 +1,30 @@
+// Copyright 2021 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 (
+	"strings"
+
+	"github.com/prometheus/procfs/internal/util"
+)
+
+// CmdLine returns the command line of the kernel.
+func (fs FS) CmdLine() ([]string, error) {
+	data, err := util.ReadFileNoStat(fs.proc.Path("cmdline"))
+	if err != nil {
+		return nil, err
+	}
+
+	return strings.Fields(string(data)), nil
+}

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

@@ -19,6 +19,7 @@ import (
 	"bufio"
 	"bytes"
 	"errors"
+	"fmt"
 	"regexp"
 	"strconv"
 	"strings"
@@ -77,7 +78,7 @@ func parseCPUInfoX86(info []byte) ([]CPUInfo, error) {
 	// find the first "processor" line
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
-		return nil, errors.New("invalid cpuinfo file: " + firstLine)
+		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	v, err := strconv.ParseUint(field[1], 0, 32)
@@ -192,7 +193,7 @@ func parseCPUInfoARM(info []byte) ([]CPUInfo, error) {
 	firstLine := firstNonEmptyLine(scanner)
 	match, _ := regexp.MatchString("^[Pp]rocessor", firstLine)
 	if !match || !strings.Contains(firstLine, ":") {
-		return nil, errors.New("invalid cpuinfo file: " + firstLine)
+		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	cpuinfo := []CPUInfo{}
@@ -256,7 +257,7 @@ func parseCPUInfoS390X(info []byte) ([]CPUInfo, error) {
 
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "vendor_id") || !strings.Contains(firstLine, ":") {
-		return nil, errors.New("invalid cpuinfo file: " + firstLine)
+		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	cpuinfo := []CPUInfo{}
@@ -281,7 +282,7 @@ func parseCPUInfoS390X(info []byte) ([]CPUInfo, error) {
 		if strings.HasPrefix(line, "processor") {
 			match := cpuinfoS390XProcessorRegexp.FindStringSubmatch(line)
 			if len(match) < 2 {
-				return nil, errors.New("Invalid line found in cpuinfo: " + line)
+				return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
 			}
 			cpu := commonCPUInfo
 			v, err := strconv.ParseUint(match[1], 0, 32)
@@ -313,6 +314,22 @@ func parseCPUInfoS390X(info []byte) ([]CPUInfo, error) {
 				return nil, err
 			}
 			cpuinfo[i].CPUMHz = v
+		case "physical id":
+			cpuinfo[i].PhysicalID = field[1]
+		case "core id":
+			cpuinfo[i].CoreID = field[1]
+		case "cpu cores":
+			v, err := strconv.ParseUint(field[1], 0, 32)
+			if err != nil {
+				return nil, err
+			}
+			cpuinfo[i].CPUCores = uint(v)
+		case "siblings":
+			v, err := strconv.ParseUint(field[1], 0, 32)
+			if err != nil {
+				return nil, err
+			}
+			cpuinfo[i].Siblings = uint(v)
 		}
 	}
 
@@ -325,7 +342,7 @@ 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, errors.New("invalid cpuinfo file: " + firstLine)
+		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	cpuinfo := []CPUInfo{}
@@ -367,7 +384,7 @@ func parseCPUInfoPPC(info []byte) ([]CPUInfo, error) {
 
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
-		return nil, errors.New("invalid cpuinfo file: " + firstLine)
+		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	v, err := strconv.ParseUint(field[1], 0, 32)
@@ -412,7 +429,7 @@ func parseCPUInfoRISCV(info []byte) ([]CPUInfo, error) {
 
 	firstLine := firstNonEmptyLine(scanner)
 	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
-		return nil, errors.New("invalid cpuinfo file: " + firstLine)
+		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
 	}
 	field := strings.SplitN(firstLine, ": ", 2)
 	v, err := strconv.ParseUint(field[1], 0, 32)

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

@@ -0,0 +1,19 @@
+// Copyright 2020 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.
+
+// +build linux
+// +build riscv riscv64
+
+package procfs
+
+var parseCPUInfo = parseCPUInfoRISCV

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

@@ -55,12 +55,12 @@ 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 %s: %s", path, err)
+		return nil, fmt.Errorf("error reading crypto %q: %w", path, err)
 	}
 
 	crypto, err := parseCrypto(bytes.NewReader(b))
 	if err != nil {
-		return nil, fmt.Errorf("error parsing crypto %s: %s", path, err)
+		return nil, fmt.Errorf("error parsing crypto %q: %w", path, err)
 	}
 
 	return crypto, nil

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

@@ -31,7 +31,7 @@
 //    		log.Fatalf("could not get process: %s", err)
 //    	}
 //
-//    	stat, err := p.NewStat()
+//    	stat, err := p.Stat()
 //    	if err != nil {
 //    		log.Fatalf("could not get process stat: %s", err)
 //    	}

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: %v", err)
+		return Fscacheinfo{}, fmt.Errorf("failed to parse Fscacheinfo: %w", err)
 	}
 
 	return *m, nil

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

@@ -39,10 +39,10 @@ type FS string
 func NewFS(mountPoint string) (FS, error) {
 	info, err := os.Stat(mountPoint)
 	if err != nil {
-		return "", fmt.Errorf("could not read %s: %s", mountPoint, err)
+		return "", fmt.Errorf("could not read %q: %w", mountPoint, err)
 	}
 	if !info.IsDir() {
-		return "", fmt.Errorf("mount point %s is not a directory", mountPoint)
+		return "", fmt.Errorf("mount point %q is not a directory", mountPoint)
 	}
 
 	return FS(mountPoint), 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: %s", string(loadavgBytes))
+		return nil, fmt.Errorf("malformed loadavg line: too few fields in loadavg string: %q", 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 '%s': %s", load, err)
+			return nil, fmt.Errorf("could not parse load %q: %w", load, err)
 		}
 	}
 	return &LoadAvg{

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

@@ -22,8 +22,12 @@ import (
 )
 
 var (
-	statusLineRE   = regexp.MustCompile(`(\d+) blocks .*\[(\d+)/(\d+)\] \[[U_]+\]`)
-	recoveryLineRE = regexp.MustCompile(`\((\d+)/\d+\)`)
+	statusLineRE         = regexp.MustCompile(`(\d+) blocks .*\[(\d+)/(\d+)\] \[([U_]+)\]`)
+	recoveryLineBlocksRE = regexp.MustCompile(`\((\d+)/\d+\)`)
+	recoveryLinePctRE    = regexp.MustCompile(`= (.+)%`)
+	recoveryLineFinishRE = regexp.MustCompile(`finish=(.+)min`)
+	recoveryLineSpeedRE  = regexp.MustCompile(`speed=(.+)[A-Z]`)
+	componentDeviceRE    = regexp.MustCompile(`(.*)\[\d+\]`)
 )
 
 // MDStat holds info parsed from /proc/mdstat.
@@ -38,12 +42,22 @@ type MDStat struct {
 	DisksTotal int64
 	// Number of failed disks.
 	DisksFailed int64
+	// Number of "down" disks. (the _ indicator in the status line)
+	DisksDown int64
 	// Spare disks in the device.
 	DisksSpare int64
 	// Number of blocks the device holds.
 	BlocksTotal int64
 	// Number of blocks on the device that are in sync.
 	BlocksSynced int64
+	// progress percentage of current sync
+	BlocksSyncedPct float64
+	// estimated finishing time for current sync (in minutes)
+	BlocksSyncedFinishTime float64
+	// current sync speed (in Kilobytes/sec)
+	BlocksSyncedSpeed float64
+	// Name of md component devices
+	Devices []string
 }
 
 // MDStat parses an mdstat-file (/proc/mdstat) and returns a slice of
@@ -56,7 +70,7 @@ func (fs FS) MDStat() ([]MDStat, error) {
 	}
 	mdstat, err := parseMDStat(data)
 	if err != nil {
-		return nil, fmt.Errorf("error parsing mdstat %s: %s", fs.proc.Path("mdstat"), err)
+		return nil, fmt.Errorf("error parsing mdstat %q: %w", fs.proc.Path("mdstat"), err)
 	}
 	return mdstat, nil
 }
@@ -82,19 +96,16 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 		state := deviceFields[2]  // active or inactive
 
 		if len(lines) <= i+3 {
-			return nil, fmt.Errorf(
-				"error parsing %s: too few lines for md device",
-				mdName,
-			)
+			return nil, fmt.Errorf("error parsing %q: too few lines for md device", mdName)
 		}
 
 		// Failed disks have the suffix (F) & Spare disks have the suffix (S).
 		fail := int64(strings.Count(line, "(F)"))
 		spare := int64(strings.Count(line, "(S)"))
-		active, total, size, err := evalStatusLine(lines[i], lines[i+1])
+		active, total, down, size, err := evalStatusLine(lines[i], lines[i+1])
 
 		if err != nil {
-			return nil, fmt.Errorf("error parsing md device lines: %s", err)
+			return nil, fmt.Errorf("error parsing md device lines: %w", err)
 		}
 
 		syncLineIdx := i + 2
@@ -105,6 +116,9 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 		// If device is syncing at the moment, get the number of currently
 		// synced bytes, otherwise that number equals the size of the device.
 		syncedBlocks := size
+		speed := float64(0)
+		finish := float64(0)
+		pct := float64(0)
 		recovering := strings.Contains(lines[syncLineIdx], "recovery")
 		resyncing := strings.Contains(lines[syncLineIdx], "resync")
 		checking := strings.Contains(lines[syncLineIdx], "check")
@@ -124,74 +138,125 @@ func parseMDStat(mdStatData []byte) ([]MDStat, error) {
 				strings.Contains(lines[syncLineIdx], "DELAYED") {
 				syncedBlocks = 0
 			} else {
-				syncedBlocks, err = evalRecoveryLine(lines[syncLineIdx])
+				syncedBlocks, pct, finish, speed, err = evalRecoveryLine(lines[syncLineIdx])
 				if err != nil {
-					return nil, fmt.Errorf("error parsing sync line in md device %s: %s", mdName, err)
+					return nil, fmt.Errorf("error parsing sync line in md device %q: %w", mdName, err)
 				}
 			}
 		}
 
 		mdStats = append(mdStats, MDStat{
-			Name:          mdName,
-			ActivityState: state,
-			DisksActive:   active,
-			DisksFailed:   fail,
-			DisksSpare:    spare,
-			DisksTotal:    total,
-			BlocksTotal:   size,
-			BlocksSynced:  syncedBlocks,
+			Name:                   mdName,
+			ActivityState:          state,
+			DisksActive:            active,
+			DisksFailed:            fail,
+			DisksDown:              down,
+			DisksSpare:             spare,
+			DisksTotal:             total,
+			BlocksTotal:            size,
+			BlocksSynced:           syncedBlocks,
+			BlocksSyncedPct:        pct,
+			BlocksSyncedFinishTime: finish,
+			BlocksSyncedSpeed:      speed,
+			Devices:                evalComponentDevices(deviceFields),
 		})
 	}
 
 	return mdStats, nil
 }
 
-func evalStatusLine(deviceLine, statusLine string) (active, total, size int64, err error) {
+func evalStatusLine(deviceLine, statusLine string) (active, total, down, size int64, err error) {
 
 	sizeStr := strings.Fields(statusLine)[0]
 	size, err = strconv.ParseInt(sizeStr, 10, 64)
 	if err != nil {
-		return 0, 0, 0, fmt.Errorf("unexpected statusLine %s: %s", statusLine, err)
+		return 0, 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err)
 	}
 
 	if strings.Contains(deviceLine, "raid0") || strings.Contains(deviceLine, "linear") {
 		// In the device deviceLine, only disks have a number associated with them in [].
 		total = int64(strings.Count(deviceLine, "["))
-		return total, total, size, nil
+		return total, total, 0, size, nil
 	}
 
 	if strings.Contains(deviceLine, "inactive") {
-		return 0, 0, size, nil
+		return 0, 0, 0, size, nil
 	}
 
 	matches := statusLineRE.FindStringSubmatch(statusLine)
-	if len(matches) != 4 {
-		return 0, 0, 0, fmt.Errorf("couldn't find all the substring matches: %s", statusLine)
+	if len(matches) != 5 {
+		return 0, 0, 0, 0, fmt.Errorf("couldn't find all the substring matches: %s", statusLine)
 	}
 
 	total, err = strconv.ParseInt(matches[2], 10, 64)
 	if err != nil {
-		return 0, 0, 0, fmt.Errorf("unexpected statusLine %s: %s", statusLine, err)
+		return 0, 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err)
 	}
 
 	active, err = strconv.ParseInt(matches[3], 10, 64)
 	if err != nil {
-		return 0, 0, 0, fmt.Errorf("unexpected statusLine %s: %s", statusLine, err)
+		return 0, 0, 0, 0, fmt.Errorf("unexpected statusLine %q: %w", statusLine, err)
 	}
+	down = int64(strings.Count(matches[4], "_"))
 
-	return active, total, size, nil
+	return active, total, down, size, nil
 }
 
-func evalRecoveryLine(recoveryLine string) (syncedBlocks int64, err error) {
-	matches := recoveryLineRE.FindStringSubmatch(recoveryLine)
+func evalRecoveryLine(recoveryLine string) (syncedBlocks int64, pct float64, finish float64, speed float64, err error) {
+	matches := recoveryLineBlocksRE.FindStringSubmatch(recoveryLine)
 	if len(matches) != 2 {
-		return 0, fmt.Errorf("unexpected recoveryLine: %s", recoveryLine)
+		return 0, 0, 0, 0, fmt.Errorf("unexpected recoveryLine: %s", recoveryLine)
 	}
 
 	syncedBlocks, err = strconv.ParseInt(matches[1], 10, 64)
 	if err != nil {
-		return 0, fmt.Errorf("%s in recoveryLine: %s", err, recoveryLine)
+		return 0, 0, 0, 0, fmt.Errorf("error parsing int from recoveryLine %q: %w", recoveryLine, err)
 	}
 
-	return syncedBlocks, nil
+	// Get percentage complete
+	matches = recoveryLinePctRE.FindStringSubmatch(recoveryLine)
+	if len(matches) != 2 {
+		return syncedBlocks, 0, 0, 0, fmt.Errorf("unexpected recoveryLine matching percentage: %s", 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)
+	}
+
+	// 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)
+	}
+	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)
+	}
+
+	// Get recovery speed
+	matches = recoveryLineSpeedRE.FindStringSubmatch(recoveryLine)
+	if len(matches) != 2 {
+		return syncedBlocks, pct, finish, 0, fmt.Errorf("unexpected recoveryLine matching speed: %s", 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, speed, nil
+}
+
+func evalComponentDevices(deviceFields []string) []string {
+	mdComponentDevices := make([]string, 0)
+	if len(deviceFields) > 3 {
+		for _, field := range deviceFields[4:] {
+			match := componentDeviceRE.FindStringSubmatch(field)
+			if match == nil {
+				continue
+			}
+			mdComponentDevices = append(mdComponentDevices, match[1])
+		}
+	}
+
+	return mdComponentDevices
 }

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

@@ -28,9 +28,9 @@ import (
 type Meminfo struct {
 	// Total usable ram (i.e. physical ram minus a few reserved
 	// bits and the kernel binary code)
-	MemTotal uint64
+	MemTotal *uint64
 	// The sum of LowFree+HighFree
-	MemFree uint64
+	MemFree *uint64
 	// An estimate of how much memory is available for starting
 	// new applications, without swapping. Calculated from
 	// MemFree, SReclaimable, the size of the file LRU lists, and
@@ -39,59 +39,59 @@ type Meminfo struct {
 	// well, and that not all reclaimable slab will be
 	// reclaimable, due to items being in use. The impact of those
 	// factors will vary from system to system.
-	MemAvailable uint64
+	MemAvailable *uint64
 	// Relatively temporary storage for raw disk blocks shouldn't
 	// get tremendously large (20MB or so)
-	Buffers uint64
-	Cached  uint64
+	Buffers *uint64
+	Cached  *uint64
 	// Memory that once was swapped out, is swapped back in but
 	// still also is in the swapfile (if memory is needed it
 	// doesn't need to be swapped out AGAIN because it is already
 	// in the swapfile. This saves I/O)
-	SwapCached uint64
+	SwapCached *uint64
 	// Memory that has been used more recently and usually not
 	// reclaimed unless absolutely necessary.
-	Active uint64
+	Active *uint64
 	// Memory which has been less recently used.  It is more
 	// eligible to be reclaimed for other purposes
-	Inactive     uint64
-	ActiveAnon   uint64
-	InactiveAnon uint64
-	ActiveFile   uint64
-	InactiveFile uint64
-	Unevictable  uint64
-	Mlocked      uint64
+	Inactive     *uint64
+	ActiveAnon   *uint64
+	InactiveAnon *uint64
+	ActiveFile   *uint64
+	InactiveFile *uint64
+	Unevictable  *uint64
+	Mlocked      *uint64
 	// total amount of swap space available
-	SwapTotal uint64
+	SwapTotal *uint64
 	// Memory which has been evicted from RAM, and is temporarily
 	// on the disk
-	SwapFree uint64
+	SwapFree *uint64
 	// Memory which is waiting to get written back to the disk
-	Dirty uint64
+	Dirty *uint64
 	// Memory which is actively being written back to the disk
-	Writeback uint64
+	Writeback *uint64
 	// Non-file backed pages mapped into userspace page tables
-	AnonPages uint64
+	AnonPages *uint64
 	// files which have been mapped, such as libraries
-	Mapped uint64
-	Shmem  uint64
+	Mapped *uint64
+	Shmem  *uint64
 	// in-kernel data structures cache
-	Slab uint64
+	Slab *uint64
 	// Part of Slab, that might be reclaimed, such as caches
-	SReclaimable uint64
+	SReclaimable *uint64
 	// Part of Slab, that cannot be reclaimed on memory pressure
-	SUnreclaim  uint64
-	KernelStack uint64
+	SUnreclaim  *uint64
+	KernelStack *uint64
 	// amount of memory dedicated to the lowest level of page
 	// tables.
-	PageTables uint64
+	PageTables *uint64
 	// NFS pages sent to the server, but not yet committed to
 	// stable storage
-	NFSUnstable uint64
+	NFSUnstable *uint64
 	// Memory used for block device "bounce buffers"
-	Bounce uint64
+	Bounce *uint64
 	// Memory used by FUSE for temporary writeback buffers
-	WritebackTmp uint64
+	WritebackTmp *uint64
 	// Based on the overcommit ratio ('vm.overcommit_ratio'),
 	// this is the total amount of  memory currently available to
 	// be allocated on the system. This limit is only adhered to
@@ -105,7 +105,7 @@ type Meminfo struct {
 	// yield a CommitLimit of 7.3G.
 	// For more details, see the memory overcommit documentation
 	// in vm/overcommit-accounting.
-	CommitLimit uint64
+	CommitLimit *uint64
 	// The amount of memory presently allocated on the system.
 	// The committed memory is a sum of all of the memory which
 	// has been allocated by processes, even if it has not been
@@ -119,27 +119,27 @@ type Meminfo struct {
 	// This is useful if one needs to guarantee that processes will
 	// not fail due to lack of memory once that memory has been
 	// successfully allocated.
-	CommittedAS uint64
+	CommittedAS *uint64
 	// total size of vmalloc memory area
-	VmallocTotal uint64
+	VmallocTotal *uint64
 	// amount of vmalloc area which is used
-	VmallocUsed uint64
+	VmallocUsed *uint64
 	// largest contiguous block of vmalloc area which is free
-	VmallocChunk      uint64
-	HardwareCorrupted uint64
-	AnonHugePages     uint64
-	ShmemHugePages    uint64
-	ShmemPmdMapped    uint64
-	CmaTotal          uint64
-	CmaFree           uint64
-	HugePagesTotal    uint64
-	HugePagesFree     uint64
-	HugePagesRsvd     uint64
-	HugePagesSurp     uint64
-	Hugepagesize      uint64
-	DirectMap4k       uint64
-	DirectMap2M       uint64
-	DirectMap1G       uint64
+	VmallocChunk      *uint64
+	HardwareCorrupted *uint64
+	AnonHugePages     *uint64
+	ShmemHugePages    *uint64
+	ShmemPmdMapped    *uint64
+	CmaTotal          *uint64
+	CmaFree           *uint64
+	HugePagesTotal    *uint64
+	HugePagesFree     *uint64
+	HugePagesRsvd     *uint64
+	HugePagesSurp     *uint64
+	Hugepagesize      *uint64
+	DirectMap4k       *uint64
+	DirectMap2M       *uint64
+	DirectMap1G       *uint64
 }
 
 // Meminfo returns an information about current kernel/system memory statistics.
@@ -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: %v", err)
+		return Meminfo{}, fmt.Errorf("failed to parse meminfo: %w", err)
 	}
 
 	return *m, nil
@@ -175,101 +175,101 @@ func parseMemInfo(r io.Reader) (*Meminfo, error) {
 
 		switch fields[0] {
 		case "MemTotal:":
-			m.MemTotal = v
+			m.MemTotal = &v
 		case "MemFree:":
-			m.MemFree = v
+			m.MemFree = &v
 		case "MemAvailable:":
-			m.MemAvailable = v
+			m.MemAvailable = &v
 		case "Buffers:":
-			m.Buffers = v
+			m.Buffers = &v
 		case "Cached:":
-			m.Cached = v
+			m.Cached = &v
 		case "SwapCached:":
-			m.SwapCached = v
+			m.SwapCached = &v
 		case "Active:":
-			m.Active = v
+			m.Active = &v
 		case "Inactive:":
-			m.Inactive = v
+			m.Inactive = &v
 		case "Active(anon):":
-			m.ActiveAnon = v
+			m.ActiveAnon = &v
 		case "Inactive(anon):":
-			m.InactiveAnon = v
+			m.InactiveAnon = &v
 		case "Active(file):":
-			m.ActiveFile = v
+			m.ActiveFile = &v
 		case "Inactive(file):":
-			m.InactiveFile = v
+			m.InactiveFile = &v
 		case "Unevictable:":
-			m.Unevictable = v
+			m.Unevictable = &v
 		case "Mlocked:":
-			m.Mlocked = v
+			m.Mlocked = &v
 		case "SwapTotal:":
-			m.SwapTotal = v
+			m.SwapTotal = &v
 		case "SwapFree:":
-			m.SwapFree = v
+			m.SwapFree = &v
 		case "Dirty:":
-			m.Dirty = v
+			m.Dirty = &v
 		case "Writeback:":
-			m.Writeback = v
+			m.Writeback = &v
 		case "AnonPages:":
-			m.AnonPages = v
+			m.AnonPages = &v
 		case "Mapped:":
-			m.Mapped = v
+			m.Mapped = &v
 		case "Shmem:":
-			m.Shmem = v
+			m.Shmem = &v
 		case "Slab:":
-			m.Slab = v
+			m.Slab = &v
 		case "SReclaimable:":
-			m.SReclaimable = v
+			m.SReclaimable = &v
 		case "SUnreclaim:":
-			m.SUnreclaim = v
+			m.SUnreclaim = &v
 		case "KernelStack:":
-			m.KernelStack = v
+			m.KernelStack = &v
 		case "PageTables:":
-			m.PageTables = v
+			m.PageTables = &v
 		case "NFS_Unstable:":
-			m.NFSUnstable = v
+			m.NFSUnstable = &v
 		case "Bounce:":
-			m.Bounce = v
+			m.Bounce = &v
 		case "WritebackTmp:":
-			m.WritebackTmp = v
+			m.WritebackTmp = &v
 		case "CommitLimit:":
-			m.CommitLimit = v
+			m.CommitLimit = &v
 		case "Committed_AS:":
-			m.CommittedAS = v
+			m.CommittedAS = &v
 		case "VmallocTotal:":
-			m.VmallocTotal = v
+			m.VmallocTotal = &v
 		case "VmallocUsed:":
-			m.VmallocUsed = v
+			m.VmallocUsed = &v
 		case "VmallocChunk:":
-			m.VmallocChunk = v
+			m.VmallocChunk = &v
 		case "HardwareCorrupted:":
-			m.HardwareCorrupted = v
+			m.HardwareCorrupted = &v
 		case "AnonHugePages:":
-			m.AnonHugePages = v
+			m.AnonHugePages = &v
 		case "ShmemHugePages:":
-			m.ShmemHugePages = v
+			m.ShmemHugePages = &v
 		case "ShmemPmdMapped:":
-			m.ShmemPmdMapped = v
+			m.ShmemPmdMapped = &v
 		case "CmaTotal:":
-			m.CmaTotal = v
+			m.CmaTotal = &v
 		case "CmaFree:":
-			m.CmaFree = v
+			m.CmaFree = &v
 		case "HugePages_Total:":
-			m.HugePagesTotal = v
+			m.HugePagesTotal = &v
 		case "HugePages_Free:":
-			m.HugePagesFree = v
+			m.HugePagesFree = &v
 		case "HugePages_Rsvd:":
-			m.HugePagesRsvd = v
+			m.HugePagesRsvd = &v
 		case "HugePages_Surp:":
-			m.HugePagesSurp = v
+			m.HugePagesSurp = &v
 		case "Hugepagesize:":
-			m.Hugepagesize = v
+			m.Hugepagesize = &v
 		case "DirectMap4k:":
-			m.DirectMap4k = v
+			m.DirectMap4k = &v
 		case "DirectMap2M:":
-			m.DirectMap2M = v
+			m.DirectMap2M = &v
 		case "DirectMap1G:":
-			m.DirectMap1G = v
+			m.DirectMap1G = &v
 		}
 	}
 

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

@@ -338,12 +338,12 @@ func parseMountStatsNFS(s *bufio.Scanner, statVersion string) (*MountStatsNFS, e
 		if len(ss) == 0 {
 			break
 		}
-		if len(ss) < 2 {
-			return nil, fmt.Errorf("not enough information for NFS stats: %v", ss)
-		}
 
 		switch ss[0] {
 		case fieldOpts:
+			if len(ss) < 2 {
+				return nil, fmt.Errorf("not enough information for NFS stats: %v", ss)
+			}
 			if stats.Opts == nil {
 				stats.Opts = map[string]string{}
 			}
@@ -356,6 +356,9 @@ 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)
+			}
 			// Age integer is in seconds
 			d, err := time.ParseDuration(ss[1] + "s")
 			if err != nil {
@@ -364,6 +367,9 @@ 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)
+			}
 			bstats, err := parseNFSBytesStats(ss[1:])
 			if err != nil {
 				return nil, err
@@ -371,6 +377,9 @@ 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)
+			}
 			estats, err := parseNFSEventsStats(ss[1:])
 			if err != nil {
 				return nil, err

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

@@ -55,7 +55,7 @@ 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: %v", path, err)
+		return nil, fmt.Errorf("failed to read conntrack stats from %q: %w", path, err)
 	}
 
 	return stat, nil
@@ -147,7 +147,7 @@ func parseConntrackStatEntry(fields []string) (*ConntrackStatEntry, error) {
 func parseConntrackStatField(field string) (uint64, error) {
 	val, err := strconv.ParseUint(field, 16, 64)
 	if err != nil {
-		return 0, fmt.Errorf("couldn't parse \"%s\" field: %s", field, err)
+		return 0, fmt.Errorf("couldn't parse %q field: %w", field, err)
 	}
 	return val, err
 }

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

@@ -0,0 +1,226 @@
+// Copyright 2020 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"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+)
+
+const (
+	// readLimit is used by io.LimitReader while reading the content of the
+	// /proc/net/udp{,6} files. The number of lines inside such a file is dynamic
+	// as each line represents a single used socket.
+	// In theory, the number of available sockets is 65535 (2^16 - 1) per IP.
+	// With e.g. 150 Byte per line and the maximum number of 65535,
+	// the reader needs to handle 150 Byte * 65535 =~ 10 MB for a single IP.
+	readLimit = 4294967296 // Byte -> 4 GiB
+)
+
+// this contains generic data structures for both udp and tcp sockets
+type (
+	// NetIPSocket represents the contents of /proc/net/{t,u}dp{,6} file without the header.
+	NetIPSocket []*netIPSocketLine
+
+	// NetIPSocketSummary provides already computed values like the total queue lengths or
+	// the total number of used sockets. In contrast to NetIPSocket it does not collect
+	// the parsed lines into a slice.
+	NetIPSocketSummary struct {
+		// TxQueueLength shows the total queue length of all parsed tx_queue lengths.
+		TxQueueLength uint64
+		// RxQueueLength shows the total queue length of all parsed rx_queue lengths.
+		RxQueueLength uint64
+		// UsedSockets shows the total number of parsed lines representing the
+		// number of used sockets.
+		UsedSockets uint64
+	}
+
+	// netIPSocketLine represents the fields parsed from a single line
+	// in /proc/net/{t,u}dp{,6}. Fields which are not used by IPSocket are skipped.
+	// For the proc file format details, see https://linux.die.net/man/5/proc.
+	netIPSocketLine struct {
+		Sl        uint64
+		LocalAddr net.IP
+		LocalPort uint64
+		RemAddr   net.IP
+		RemPort   uint64
+		St        uint64
+		TxQueue   uint64
+		RxQueue   uint64
+		UID       uint64
+		Inode     uint64
+	}
+)
+
+func newNetIPSocket(file string) (NetIPSocket, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var netIPSocket NetIPSocket
+
+	lr := io.LimitReader(f, readLimit)
+	s := bufio.NewScanner(lr)
+	s.Scan() // skip first line with headers
+	for s.Scan() {
+		fields := strings.Fields(s.Text())
+		line, err := parseNetIPSocketLine(fields)
+		if err != nil {
+			return nil, err
+		}
+		netIPSocket = append(netIPSocket, line)
+	}
+	if err := s.Err(); err != nil {
+		return nil, err
+	}
+	return netIPSocket, nil
+}
+
+// newNetIPSocketSummary creates a new NetIPSocket{,6} from the contents of the given file.
+func newNetIPSocketSummary(file string) (*NetIPSocketSummary, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var netIPSocketSummary NetIPSocketSummary
+
+	lr := io.LimitReader(f, readLimit)
+	s := bufio.NewScanner(lr)
+	s.Scan() // skip first line with headers
+	for s.Scan() {
+		fields := strings.Fields(s.Text())
+		line, err := parseNetIPSocketLine(fields)
+		if err != nil {
+			return nil, err
+		}
+		netIPSocketSummary.TxQueueLength += line.TxQueue
+		netIPSocketSummary.RxQueueLength += line.RxQueue
+		netIPSocketSummary.UsedSockets++
+	}
+	if err := s.Err(); err != nil {
+		return nil, err
+	}
+	return &netIPSocketSummary, nil
+}
+
+// the /proc/net/{t,u}dp{,6} files are network byte order for ipv4 and for ipv6 the address is four words consisting of four bytes each. In each of those four words the four bytes are written in reverse order.
+
+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)
+	}
+	switch len(byteIP) {
+	case 4:
+		return net.IP{byteIP[3], byteIP[2], byteIP[1], byteIP[0]}, nil
+	case 16:
+		i := net.IP{
+			byteIP[3], byteIP[2], byteIP[1], byteIP[0],
+			byteIP[7], byteIP[6], byteIP[5], byteIP[4],
+			byteIP[11], byteIP[10], byteIP[9], byteIP[8],
+			byteIP[15], byteIP[14], byteIP[13], byteIP[12],
+		}
+		return i, nil
+	default:
+		return nil, fmt.Errorf("Unable to parse IP %s", hexIP)
+	}
+}
+
+// parseNetIPSocketLine parses a single line, represented by a list of fields.
+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",
+			strings.Join(fields, " "),
+		)
+	}
+	var err error // parse 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])
+	}
+
+	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)
+	}
+	// 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])
+	}
+	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)
+	}
+
+	// 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])
+	}
+	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)
+	}
+
+	// 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)
+	}
+
+	// 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",
+			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)
+	}
+	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)
+	}
+
+	// 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)
+	}
+
+	// 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 line, nil
+}

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

@@ -0,0 +1,180 @@
+// Copyright 2020 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"
+	"strconv"
+	"strings"
+
+	"github.com/prometheus/procfs/internal/util"
+)
+
+// NetProtocolStats stores the contents from /proc/net/protocols
+type NetProtocolStats map[string]NetProtocolStatLine
+
+// NetProtocolStatLine contains a single line parsed from /proc/net/protocols. We
+// only care about the first six columns as the rest are not likely to change
+// and only serve to provide a set of capabilities for each protocol.
+type NetProtocolStatLine struct {
+	Name         string // 0 The name of the protocol
+	Size         uint64 // 1 The size, in bytes, of a given protocol structure. e.g. sizeof(struct tcp_sock) or sizeof(struct unix_sock)
+	Sockets      int64  // 2 Number of sockets in use by this protocol
+	Memory       int64  // 3 Number of 4KB pages allocated by all sockets of this protocol
+	Pressure     int    // 4 This is either yes, no, or NI (not implemented). For the sake of simplicity we treat NI as not experiencing memory pressure.
+	MaxHeader    uint64 // 5 Protocol specific max header size
+	Slab         bool   // 6 Indicates whether or not memory is allocated from the SLAB
+	ModuleName   string // 7 The name of the module that implemented this protocol or "kernel" if not from a module
+	Capabilities NetProtocolCapabilities
+}
+
+// NetProtocolCapabilities contains a list of capabilities for each protocol
+type NetProtocolCapabilities struct {
+	Close               bool // 8
+	Connect             bool // 9
+	Disconnect          bool // 10
+	Accept              bool // 11
+	IoCtl               bool // 12
+	Init                bool // 13
+	Destroy             bool // 14
+	Shutdown            bool // 15
+	SetSockOpt          bool // 16
+	GetSockOpt          bool // 17
+	SendMsg             bool // 18
+	RecvMsg             bool // 19
+	SendPage            bool // 20
+	Bind                bool // 21
+	BacklogRcv          bool // 22
+	Hash                bool // 23
+	UnHash              bool // 24
+	GetPort             bool // 25
+	EnterMemoryPressure bool // 26
+}
+
+// NetProtocols reads stats from /proc/net/protocols and returns a map of
+// PortocolStatLine entries. As of this writing no official Linux Documentation
+// exists, however the source is fairly self-explanatory and the format seems
+// stable since its introduction in 2.6.12-rc2
+// Linux 2.6.12-rc2 - https://elixir.bootlin.com/linux/v2.6.12-rc2/source/net/core/sock.c#L1452
+// Linux 5.10 - https://elixir.bootlin.com/linux/v5.10.4/source/net/core/sock.c#L3586
+func (fs FS) NetProtocols() (NetProtocolStats, error) {
+	data, err := util.ReadFileNoStat(fs.proc.Path("net/protocols"))
+	if err != nil {
+		return NetProtocolStats{}, err
+	}
+	return parseNetProtocols(bufio.NewScanner(bytes.NewReader(data)))
+}
+
+func parseNetProtocols(s *bufio.Scanner) (NetProtocolStats, error) {
+	nps := NetProtocolStats{}
+
+	// Skip the header line
+	s.Scan()
+
+	for s.Scan() {
+		line, err := nps.parseLine(s.Text())
+		if err != nil {
+			return NetProtocolStats{}, err
+		}
+
+		nps[line.Name] = *line
+	}
+	return nps, nil
+}
+
+func (ps NetProtocolStats) parseLine(rawLine string) (*NetProtocolStatLine, error) {
+	line := &NetProtocolStatLine{Capabilities: NetProtocolCapabilities{}}
+	var err error
+	const enabled = "yes"
+	const disabled = "no"
+
+	fields := strings.Fields(rawLine)
+	line.Name = fields[0]
+	line.Size, err = strconv.ParseUint(fields[1], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.Sockets, err = strconv.ParseInt(fields[2], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	line.Memory, err = strconv.ParseInt(fields[3], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	if fields[4] == enabled {
+		line.Pressure = 1
+	} else if fields[4] == disabled {
+		line.Pressure = 0
+	} else {
+		line.Pressure = -1
+	}
+	line.MaxHeader, err = strconv.ParseUint(fields[5], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	if fields[6] == enabled {
+		line.Slab = true
+	} else if fields[6] == disabled {
+		line.Slab = false
+	} else {
+		return nil, fmt.Errorf("unable to parse capability for protocol: %s", line.Name)
+	}
+	line.ModuleName = fields[7]
+
+	err = line.Capabilities.parseCapabilities(fields[8:])
+	if err != nil {
+		return nil, err
+	}
+
+	return line, nil
+}
+
+func (pc *NetProtocolCapabilities) parseCapabilities(capabilities []string) error {
+	// The capabilities are all bools so we can loop over to map them
+	capabilityFields := [...]*bool{
+		&pc.Close,
+		&pc.Connect,
+		&pc.Disconnect,
+		&pc.Accept,
+		&pc.IoCtl,
+		&pc.Init,
+		&pc.Destroy,
+		&pc.Shutdown,
+		&pc.SetSockOpt,
+		&pc.GetSockOpt,
+		&pc.SendMsg,
+		&pc.RecvMsg,
+		&pc.SendPage,
+		&pc.Bind,
+		&pc.BacklogRcv,
+		&pc.Hash,
+		&pc.UnHash,
+		&pc.GetPort,
+		&pc.EnterMemoryPressure,
+	}
+
+	for i := 0; i < len(capabilities); i++ {
+		if capabilities[i] == "y" {
+			*capabilityFields[i] = true
+		} else if capabilities[i] == "n" {
+			*capabilityFields[i] = false
+		} else {
+			return fmt.Errorf("unable to parse capability block for protocol: position %d", i)
+		}
+	}
+	return nil
+}

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

@@ -70,7 +70,7 @@ 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: %v", name, err)
+		return nil, fmt.Errorf("failed to read sockstats from %q: %w", name, err)
 	}
 
 	return stat, nil
@@ -90,7 +90,7 @@ func parseSockstat(r io.Reader) (*NetSockstat, error) {
 		// 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: %v", s.Text(), err)
+			return nil, fmt.Errorf("error parsing sockstat key/value pairs from %q: %w", s.Text(), err)
 		}
 
 		// The first field is the protocol. We must trim its colon suffix.

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

@@ -51,7 +51,7 @@ 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: %v", err)
+		return nil, fmt.Errorf("failed to parse /proc/net/softnet_stat: %w", err)
 	}
 
 	return entries, nil

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

@@ -0,0 +1,64 @@
+// Copyright 2020 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
+
+type (
+	// NetTCP represents the contents of /proc/net/tcp{,6} file without the header.
+	NetTCP []*netIPSocketLine
+
+	// NetTCPSummary provides already computed values like the total queue lengths or
+	// the total number of used sockets. In contrast to NetTCP it does not collect
+	// the parsed lines into a slice.
+	NetTCPSummary NetIPSocketSummary
+)
+
+// NetTCP returns the IPv4 kernel/networking statistics for TCP datagrams
+// read from /proc/net/tcp.
+func (fs FS) NetTCP() (NetTCP, error) {
+	return newNetTCP(fs.proc.Path("net/tcp"))
+}
+
+// NetTCP6 returns the IPv6 kernel/networking statistics for TCP datagrams
+// read from /proc/net/tcp6.
+func (fs FS) NetTCP6() (NetTCP, error) {
+	return newNetTCP(fs.proc.Path("net/tcp6"))
+}
+
+// NetTCPSummary returns already computed statistics like the total queue lengths
+// for TCP datagrams read from /proc/net/tcp.
+func (fs FS) NetTCPSummary() (*NetTCPSummary, error) {
+	return newNetTCPSummary(fs.proc.Path("net/tcp"))
+}
+
+// NetTCP6Summary returns already computed statistics like the total queue lengths
+// for TCP datagrams read from /proc/net/tcp6.
+func (fs FS) NetTCP6Summary() (*NetTCPSummary, error) {
+	return newNetTCPSummary(fs.proc.Path("net/tcp6"))
+}
+
+// newNetTCP creates a new NetTCP{,6} from the contents of the given file.
+func newNetTCP(file string) (NetTCP, error) {
+	n, err := newNetIPSocket(file)
+	n1 := NetTCP(n)
+	return n1, err
+}
+
+func newNetTCPSummary(file string) (*NetTCPSummary, error) {
+	n, err := newNetIPSocketSummary(file)
+	if n == nil {
+		return nil, err
+	}
+	n1 := NetTCPSummary(*n)
+	return &n1, err
+}

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

@@ -13,58 +13,14 @@
 
 package procfs
 
-import (
-	"bufio"
-	"encoding/hex"
-	"fmt"
-	"io"
-	"net"
-	"os"
-	"strconv"
-	"strings"
-)
-
-const (
-	// readLimit is used by io.LimitReader while reading the content of the
-	// /proc/net/udp{,6} files. The number of lines inside such a file is dynamic
-	// as each line represents a single used socket.
-	// In theory, the number of available sockets is 65535 (2^16 - 1) per IP.
-	// With e.g. 150 Byte per line and the maximum number of 65535,
-	// the reader needs to handle 150 Byte * 65535 =~ 10 MB for a single IP.
-	readLimit = 4294967296 // Byte -> 4 GiB
-)
-
 type (
 	// NetUDP represents the contents of /proc/net/udp{,6} file without the header.
-	NetUDP []*netUDPLine
+	NetUDP []*netIPSocketLine
 
 	// NetUDPSummary provides already computed values like the total queue lengths or
 	// the total number of used sockets. In contrast to NetUDP it does not collect
 	// the parsed lines into a slice.
-	NetUDPSummary struct {
-		// TxQueueLength shows the total queue length of all parsed tx_queue lengths.
-		TxQueueLength uint64
-		// RxQueueLength shows the total queue length of all parsed rx_queue lengths.
-		RxQueueLength uint64
-		// UsedSockets shows the total number of parsed lines representing the
-		// number of used sockets.
-		UsedSockets uint64
-	}
-
-	// netUDPLine represents the fields parsed from a single line
-	// in /proc/net/udp{,6}. Fields which are not used by UDP are skipped.
-	// For the proc file format details, see https://linux.die.net/man/5/proc.
-	netUDPLine struct {
-		Sl        uint64
-		LocalAddr net.IP
-		LocalPort uint64
-		RemAddr   net.IP
-		RemPort   uint64
-		St        uint64
-		TxQueue   uint64
-		RxQueue   uint64
-		UID       uint64
-	}
+	NetUDPSummary NetIPSocketSummary
 )
 
 // NetUDP returns the IPv4 kernel/networking statistics for UDP datagrams
@@ -93,137 +49,16 @@ func (fs FS) NetUDP6Summary() (*NetUDPSummary, error) {
 
 // newNetUDP creates a new NetUDP{,6} from the contents of the given file.
 func newNetUDP(file string) (NetUDP, error) {
-	f, err := os.Open(file)
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-
-	netUDP := NetUDP{}
-
-	lr := io.LimitReader(f, readLimit)
-	s := bufio.NewScanner(lr)
-	s.Scan() // skip first line with headers
-	for s.Scan() {
-		fields := strings.Fields(s.Text())
-		line, err := parseNetUDPLine(fields)
-		if err != nil {
-			return nil, err
-		}
-		netUDP = append(netUDP, line)
-	}
-	if err := s.Err(); err != nil {
-		return nil, err
-	}
-	return netUDP, nil
+	n, err := newNetIPSocket(file)
+	n1 := NetUDP(n)
+	return n1, err
 }
 
-// newNetUDPSummary creates a new NetUDP{,6} from the contents of the given file.
 func newNetUDPSummary(file string) (*NetUDPSummary, error) {
-	f, err := os.Open(file)
-	if err != nil {
+	n, err := newNetIPSocketSummary(file)
+	if n == nil {
 		return nil, err
 	}
-	defer f.Close()
-
-	netUDPSummary := &NetUDPSummary{}
-
-	lr := io.LimitReader(f, readLimit)
-	s := bufio.NewScanner(lr)
-	s.Scan() // skip first line with headers
-	for s.Scan() {
-		fields := strings.Fields(s.Text())
-		line, err := parseNetUDPLine(fields)
-		if err != nil {
-			return nil, err
-		}
-		netUDPSummary.TxQueueLength += line.TxQueue
-		netUDPSummary.RxQueueLength += line.RxQueue
-		netUDPSummary.UsedSockets++
-	}
-	if err := s.Err(); err != nil {
-		return nil, err
-	}
-	return netUDPSummary, nil
-}
-
-// parseNetUDPLine parses a single line, represented by a list of fields.
-func parseNetUDPLine(fields []string) (*netUDPLine, error) {
-	line := &netUDPLine{}
-	if len(fields) < 8 {
-		return nil, fmt.Errorf(
-			"cannot parse net udp socket line as it has less then 8 columns: %s",
-			strings.Join(fields, " "),
-		)
-	}
-	var err error // parse error
-
-	// sl
-	s := strings.Split(fields[0], ":")
-	if len(s) != 2 {
-		return nil, fmt.Errorf(
-			"cannot parse sl field in udp socket line: %s", fields[0])
-	}
-
-	if line.Sl, err = strconv.ParseUint(s[0], 0, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse sl value in udp socket line: %s", err)
-	}
-	// local_address
-	l := strings.Split(fields[1], ":")
-	if len(l) != 2 {
-		return nil, fmt.Errorf(
-			"cannot parse local_address field in udp socket line: %s", fields[1])
-	}
-	if line.LocalAddr, err = hex.DecodeString(l[0]); err != nil {
-		return nil, fmt.Errorf(
-			"cannot parse local_address value in udp socket line: %s", err)
-	}
-	if line.LocalPort, err = strconv.ParseUint(l[1], 16, 64); err != nil {
-		return nil, fmt.Errorf(
-			"cannot parse local_address port value in udp socket line: %s", err)
-	}
-
-	// remote_address
-	r := strings.Split(fields[2], ":")
-	if len(r) != 2 {
-		return nil, fmt.Errorf(
-			"cannot parse rem_address field in udp socket line: %s", fields[1])
-	}
-	if line.RemAddr, err = hex.DecodeString(r[0]); err != nil {
-		return nil, fmt.Errorf(
-			"cannot parse rem_address value in udp socket line: %s", err)
-	}
-	if line.RemPort, err = strconv.ParseUint(r[1], 16, 64); err != nil {
-		return nil, fmt.Errorf(
-			"cannot parse rem_address port value in udp socket line: %s", err)
-	}
-
-	// st
-	if line.St, err = strconv.ParseUint(fields[3], 16, 64); err != nil {
-		return nil, fmt.Errorf(
-			"cannot parse st value in udp socket line: %s", 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 udp socket line as it has a missing colon: %s",
-			fields[4],
-		)
-	}
-	if line.TxQueue, err = strconv.ParseUint(q[0], 16, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse tx_queue value in udp socket line: %s", err)
-	}
-	if line.RxQueue, err = strconv.ParseUint(q[1], 16, 64); err != nil {
-		return nil, fmt.Errorf("cannot parse rx_queue value in udp socket line: %s", err)
-	}
-
-	// uid
-	if line.UID, err = strconv.ParseUint(fields[7], 0, 64); err != nil {
-		return nil, fmt.Errorf(
-			"cannot parse uid value in udp socket line: %s", err)
-	}
-
-	return line, nil
+	n1 := NetUDPSummary(*n)
+	return &n1, err
 }

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: %v", line, err)
+			return nil, fmt.Errorf("failed to parse /proc/net/unix data %q: %w", 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: %v", err)
+		return nil, fmt.Errorf("failed to scan /proc/net/unix data: %w", err)
 	}
 
 	return &nu, nil
@@ -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(%s): %v", fields[1], err)
+		return nil, fmt.Errorf("failed to parse ref count %q: %w", fields[1], err)
 	}
 
 	flags, err := u.parseFlags(fields[3])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse flags(%s): %v", fields[3], err)
+		return nil, fmt.Errorf("failed to parse flags %q: %w", fields[3], err)
 	}
 
 	typ, err := u.parseType(fields[4])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse type(%s): %v", fields[4], err)
+		return nil, fmt.Errorf("failed to parse type %q: %w", fields[4], err)
 	}
 
 	state, err := u.parseState(fields[5])
 	if err != nil {
-		return nil, fmt.Errorf("failed to parse state(%s): %v", fields[5], err)
+		return nil, fmt.Errorf("failed to parse state %q: %w", 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(%s): %v", fields[6], err)
+			return nil, fmt.Errorf("failed to parse inode %q: %w", fields[6], err)
 		}
 	}
 

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

@@ -0,0 +1,68 @@
+// Copyright 2020 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"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+// NetStat contains statistics for all the counters from one file
+type NetStat struct {
+	Filename string
+	Stats    map[string][]uint64
+}
+
+// NetStat retrieves stats from /proc/net/stat/
+func (fs FS) NetStat() ([]NetStat, error) {
+	statFiles, err := filepath.Glob(fs.proc.Path("net/stat/*"))
+	if err != nil {
+		return nil, err
+	}
+
+	var netStatsTotal []NetStat
+
+	for _, filePath := range statFiles {
+		file, err := os.Open(filePath)
+		if err != nil {
+			return nil, err
+		}
+
+		netStatFile := NetStat{
+			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, 32)
+				if err != nil {
+					return nil, err
+				}
+				netStatFile.Stats[headers[num]] = append(netStatFile.Stats[headers[num]], value)
+			}
+		}
+		netStatsTotal = append(netStatsTotal, netStatFile)
+	}
+	return netStatsTotal, nil
+}

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

@@ -105,7 +105,7 @@ func (fs FS) AllProcs() (Procs, error) {
 
 	names, err := d.Readdirnames(-1)
 	if err != nil {
-		return Procs{}, fmt.Errorf("could not read %s: %s", d.Name(), err)
+		return Procs{}, fmt.Errorf("could not read %q: %w", d.Name(), err)
 	}
 
 	p := Procs{}
@@ -206,7 +206,7 @@ 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 %s: %s", n, err)
+			return nil, fmt.Errorf("could not parse fd %q: %w", n, err)
 		}
 		fds[i] = uintptr(fd)
 	}
@@ -278,7 +278,7 @@ func (p Proc) fileDescriptors() ([]string, error) {
 
 	names, err := d.Readdirnames(-1)
 	if err != nil {
-		return nil, fmt.Errorf("could not read %s: %s", d.Name(), err)
+		return nil, fmt.Errorf("could not read %q: %w", d.Name(), err)
 	}
 
 	return names, nil

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

@@ -49,7 +49,7 @@ type Cgroup struct {
 func parseCgroupString(cgroupStr string) (*Cgroup, error) {
 	var err error
 
-	fields := strings.Split(cgroupStr, ":")
+	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)
 	}
@@ -90,7 +90,7 @@ func parseCgroups(data []byte) ([]Cgroup, error) {
 // control hierarchy running on this system. On every system (v1 and v2), all hierarchies contain all processes,
 // so the len of the returned struct is equal to the number of active hierarchies on this system
 func (p Proc) Cgroups() ([]Cgroup, error) {
-	data, err := util.ReadFileNoStat(fmt.Sprintf("/proc/%d/cgroup", p.PID))
+	data, err := util.ReadFileNoStat(p.path("cgroup"))
 	if err != nil {
 		return nil, err
 	}

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

@@ -16,7 +16,7 @@ package procfs
 import (
 	"bufio"
 	"bytes"
-	"errors"
+	"fmt"
 	"regexp"
 
 	"github.com/prometheus/procfs/internal/util"
@@ -112,7 +112,7 @@ func parseInotifyInfo(line string) (*InotifyInfo, error) {
 		}
 		return i, nil
 	}
-	return nil, errors.New("invalid inode entry: " + line)
+	return nil, fmt.Errorf("invalid inode entry: %q", line)
 }
 
 // ProcFDInfos represents a list of ProcFDInfo structs.

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

@@ -26,55 +26,55 @@ import (
 // http://man7.org/linux/man-pages/man2/getrlimit.2.html.
 type ProcLimits struct {
 	// CPU time limit in seconds.
-	CPUTime int64
+	CPUTime uint64
 	// Maximum size of files that the process may create.
-	FileSize int64
+	FileSize uint64
 	// Maximum size of the process's data segment (initialized data,
 	// uninitialized data, and heap).
-	DataSize int64
+	DataSize uint64
 	// Maximum size of the process stack in bytes.
-	StackSize int64
+	StackSize uint64
 	// Maximum size of a core file.
-	CoreFileSize int64
+	CoreFileSize uint64
 	// Limit of the process's resident set in pages.
-	ResidentSet int64
+	ResidentSet uint64
 	// Maximum number of processes that can be created for the real user ID of
 	// the calling process.
-	Processes int64
+	Processes uint64
 	// Value one greater than the maximum file descriptor number that can be
 	// opened by this process.
-	OpenFiles int64
+	OpenFiles uint64
 	// Maximum number of bytes of memory that may be locked into RAM.
-	LockedMemory int64
+	LockedMemory uint64
 	// Maximum size of the process's virtual memory address space in bytes.
-	AddressSpace int64
+	AddressSpace uint64
 	// Limit on the combined number of flock(2) locks and fcntl(2) leases that
 	// this process may establish.
-	FileLocks int64
+	FileLocks uint64
 	// Limit of signals that may be queued for the real user ID of the calling
 	// process.
-	PendingSignals int64
+	PendingSignals uint64
 	// Limit on the number of bytes that can be allocated for POSIX message
 	// queues for the real user ID of the calling process.
-	MsqqueueSize int64
+	MsqqueueSize uint64
 	// Limit of the nice priority set using setpriority(2) or nice(2).
-	NicePriority int64
+	NicePriority uint64
 	// Limit of the real-time priority set using sched_setscheduler(2) or
 	// sched_setparam(2).
-	RealtimePriority int64
+	RealtimePriority uint64
 	// Limit (in microseconds) on the amount of CPU time that a process
 	// scheduled under a real-time scheduling policy may consume without making
 	// a blocking system call.
-	RealtimeTimeout int64
+	RealtimeTimeout uint64
 }
 
 const (
-	limitsFields    = 3
+	limitsFields    = 4
 	limitsUnlimited = "unlimited"
 )
 
 var (
-	limitsDelimiter = regexp.MustCompile("  +")
+	limitsMatch = regexp.MustCompile(`(Max \w+\s{0,1}?\w*\s{0,1}\w*)\s{2,}(\w+)\s+(\w+)`)
 )
 
 // NewLimits returns the current soft limits of the process.
@@ -96,46 +96,49 @@ func (p Proc) Limits() (ProcLimits, error) {
 		l = ProcLimits{}
 		s = bufio.NewScanner(f)
 	)
+
+	s.Scan() // Skip limits header
+
 	for s.Scan() {
-		fields := limitsDelimiter.Split(s.Text(), limitsFields)
+		//fields := limitsMatch.Split(s.Text(), limitsFields)
+		fields := limitsMatch.FindStringSubmatch(s.Text())
 		if len(fields) != limitsFields {
-			return ProcLimits{}, fmt.Errorf(
-				"couldn't parse %s line %s", f.Name(), s.Text())
+			return ProcLimits{}, fmt.Errorf("couldn't parse %q line %q", f.Name(), s.Text())
 		}
 
-		switch fields[0] {
+		switch fields[1] {
 		case "Max cpu time":
-			l.CPUTime, err = parseInt(fields[1])
+			l.CPUTime, err = parseUint(fields[2])
 		case "Max file size":
-			l.FileSize, err = parseInt(fields[1])
+			l.FileSize, err = parseUint(fields[2])
 		case "Max data size":
-			l.DataSize, err = parseInt(fields[1])
+			l.DataSize, err = parseUint(fields[2])
 		case "Max stack size":
-			l.StackSize, err = parseInt(fields[1])
+			l.StackSize, err = parseUint(fields[2])
 		case "Max core file size":
-			l.CoreFileSize, err = parseInt(fields[1])
+			l.CoreFileSize, err = parseUint(fields[2])
 		case "Max resident set":
-			l.ResidentSet, err = parseInt(fields[1])
+			l.ResidentSet, err = parseUint(fields[2])
 		case "Max processes":
-			l.Processes, err = parseInt(fields[1])
+			l.Processes, err = parseUint(fields[2])
 		case "Max open files":
-			l.OpenFiles, err = parseInt(fields[1])
+			l.OpenFiles, err = parseUint(fields[2])
 		case "Max locked memory":
-			l.LockedMemory, err = parseInt(fields[1])
+			l.LockedMemory, err = parseUint(fields[2])
 		case "Max address space":
-			l.AddressSpace, err = parseInt(fields[1])
+			l.AddressSpace, err = parseUint(fields[2])
 		case "Max file locks":
-			l.FileLocks, err = parseInt(fields[1])
+			l.FileLocks, err = parseUint(fields[2])
 		case "Max pending signals":
-			l.PendingSignals, err = parseInt(fields[1])
+			l.PendingSignals, err = parseUint(fields[2])
 		case "Max msgqueue size":
-			l.MsqqueueSize, err = parseInt(fields[1])
+			l.MsqqueueSize, err = parseUint(fields[2])
 		case "Max nice priority":
-			l.NicePriority, err = parseInt(fields[1])
+			l.NicePriority, err = parseUint(fields[2])
 		case "Max realtime priority":
-			l.RealtimePriority, err = parseInt(fields[1])
+			l.RealtimePriority, err = parseUint(fields[2])
 		case "Max realtime timeout":
-			l.RealtimeTimeout, err = parseInt(fields[1])
+			l.RealtimeTimeout, err = parseUint(fields[2])
 		}
 		if err != nil {
 			return ProcLimits{}, err
@@ -145,13 +148,13 @@ func (p Proc) Limits() (ProcLimits, error) {
 	return l, s.Err()
 }
 
-func parseInt(s string) (int64, error) {
+func parseUint(s string) (uint64, error) {
 	if s == limitsUnlimited {
-		return -1, nil
+		return 18446744073709551615, nil
 	}
-	i, err := strconv.ParseInt(s, 10, 64)
+	i, err := strconv.ParseUint(s, 10, 64)
 	if err != nil {
-		return 0, fmt.Errorf("couldn't parse value %s: %s", s, err)
+		return 0, fmt.Errorf("couldn't parse value %q: %w", s, err)
 	}
 	return i, nil
 }

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: %v", err)
+		return nil, fmt.Errorf("failed to read contents of ns dir: %w", 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 '%v'", target)
+			return nil, fmt.Errorf("failed to parse namespace type and inode from %q", 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 '%v': %v", fields[1], err)
+			return nil, fmt.Errorf("failed to parse inode from %q: %w", fields[1], err)
 		}
 
 		ns[name] = Namespace{typ, uint32(inode)}

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

@@ -59,7 +59,7 @@ 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 %s", resource)
+		return PSIStats{}, fmt.Errorf("psi_stats: unavailable for %q: %w", resource, err)
 	}
 
 	return parsePSIStats(resource, bytes.NewReader(data))

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

@@ -100,6 +100,15 @@ type ProcStat struct {
 	VSize uint
 	// Resident set size in pages.
 	RSS int
+	// Soft limit in bytes on the rss of the process.
+	RSSLimit uint64
+	// 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
+	// Scheduling policy.
+	Policy uint
+	// Aggregated block I/O delays, measured in clock ticks (centiseconds).
+	DelayAcctBlkIOTicks uint64
 
 	proc fs.FS
 }
@@ -119,7 +128,8 @@ func (p Proc) Stat() (ProcStat, error) {
 	}
 
 	var (
-		ignore int
+		ignoreInt64  int64
+		ignoreUint64 uint64
 
 		s = ProcStat{PID: p.PID, proc: p.fs}
 		l = bytes.Index(data, []byte("("))
@@ -127,10 +137,7 @@ func (p Proc) Stat() (ProcStat, error) {
 	)
 
 	if l < 0 || r < 0 {
-		return ProcStat{}, fmt.Errorf(
-			"unexpected format, couldn't extract comm: %s",
-			data,
-		)
+		return ProcStat{}, fmt.Errorf("unexpected format, couldn't extract comm %q", data)
 	}
 
 	s.Comm = string(data[l+1 : r])
@@ -154,10 +161,28 @@ func (p Proc) Stat() (ProcStat, error) {
 		&s.Priority,
 		&s.Nice,
 		&s.NumThreads,
-		&ignore,
+		&ignoreInt64,
 		&s.Starttime,
 		&s.VSize,
 		&s.RSS,
+		&s.RSSLimit,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreUint64,
+		&ignoreInt64,
+		&ignoreInt64,
+		&s.RTPriority,
+		&s.Policy,
+		&s.DelayAcctBlkIOTicks,
 	)
 	if err != nil {
 		return ProcStat{}, err

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

@@ -95,24 +95,27 @@ func (fs FS) Schedstat() (*Schedstat, error) {
 	return stats, nil
 }
 
-func parseProcSchedstat(contents string) (stats ProcSchedstat, err error) {
+func parseProcSchedstat(contents string) (ProcSchedstat, error) {
+	var (
+		stats ProcSchedstat
+		err   error
+	)
 	match := procLineRE.FindStringSubmatch(contents)
 
 	if match != nil {
 		stats.RunningNanoseconds, err = strconv.ParseUint(match[1], 10, 64)
 		if err != nil {
-			return
+			return stats, err
 		}
 
 		stats.WaitingNanoseconds, err = strconv.ParseUint(match[2], 10, 64)
 		if err != nil {
-			return
+			return stats, err
 		}
 
 		stats.RunTimeslices, err = strconv.ParseUint(match[3], 10, 64)
-		return
+		return stats, err
 	}
 
-	err = errors.New("could not parse schedstat")
-	return
+	return stats, errors.New("could not parse schedstat")
 }

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

@@ -0,0 +1,151 @@
+// Copyright 2020 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"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/prometheus/procfs/internal/util"
+)
+
+var (
+	slabSpace  = regexp.MustCompile(`\s+`)
+	slabVer    = regexp.MustCompile(`slabinfo -`)
+	slabHeader = regexp.MustCompile(`# name`)
+)
+
+// Slab represents a slab pool in the kernel.
+type Slab struct {
+	Name         string
+	ObjActive    int64
+	ObjNum       int64
+	ObjSize      int64
+	ObjPerSlab   int64
+	PagesPerSlab int64
+	// tunables
+	Limit        int64
+	Batch        int64
+	SharedFactor int64
+	SlabActive   int64
+	SlabNum      int64
+	SharedAvail  int64
+}
+
+// SlabInfo represents info for all slabs.
+type SlabInfo struct {
+	Slabs []*Slab
+}
+
+func shouldParseSlab(line string) bool {
+	if slabVer.MatchString(line) {
+		return false
+	}
+	if slabHeader.MatchString(line) {
+		return false
+	}
+	return true
+}
+
+// parseV21SlabEntry is used to parse a line from /proc/slabinfo version 2.1.
+func parseV21SlabEntry(line string) (*Slab, error) {
+	// First cleanup whitespace.
+	l := slabSpace.ReplaceAllString(line, " ")
+	s := strings.Split(l, " ")
+	if len(s) != 16 {
+		return nil, fmt.Errorf("unable to parse: %q", line)
+	}
+	var err error
+	i := &Slab{Name: s[0]}
+	i.ObjActive, err = strconv.ParseInt(s[1], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.ObjNum, err = strconv.ParseInt(s[2], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.ObjSize, err = strconv.ParseInt(s[3], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.ObjPerSlab, err = strconv.ParseInt(s[4], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.PagesPerSlab, err = strconv.ParseInt(s[5], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.Limit, err = strconv.ParseInt(s[8], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.Batch, err = strconv.ParseInt(s[9], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.SharedFactor, err = strconv.ParseInt(s[10], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.SlabActive, err = strconv.ParseInt(s[13], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.SlabNum, err = strconv.ParseInt(s[14], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	i.SharedAvail, err = strconv.ParseInt(s[15], 10, 64)
+	if err != nil {
+		return nil, err
+	}
+	return i, nil
+}
+
+// parseSlabInfo21 is used to parse a slabinfo 2.1 file.
+func parseSlabInfo21(r *bytes.Reader) (SlabInfo, error) {
+	scanner := bufio.NewScanner(r)
+	s := SlabInfo{Slabs: []*Slab{}}
+	for scanner.Scan() {
+		line := scanner.Text()
+		if !shouldParseSlab(line) {
+			continue
+		}
+		slab, err := parseV21SlabEntry(line)
+		if err != nil {
+			return s, err
+		}
+		s.Slabs = append(s.Slabs, slab)
+	}
+	return s, nil
+}
+
+// SlabInfo reads data from /proc/slabinfo
+func (fs FS) SlabInfo() (SlabInfo, error) {
+	// TODO: Consider passing options to allow for parsing different
+	// slabinfo versions. However, slabinfo 2.1 has been stable since
+	// kernel 2.6.10 and later.
+	data, err := util.ReadFileNoStat(fs.proc.Path("slabinfo"))
+	if err != nil {
+		return SlabInfo{}, err
+	}
+
+	return parseSlabInfo21(bytes.NewReader(data))
+}

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

@@ -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 %s (cpu): %s", line, err)
+		return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu): %w", line, err)
 	}
 	if count == 0 {
-		return CPUStat{}, -1, fmt.Errorf("couldn't parse %s (cpu): 0 elements parsed", line)
+		return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu): 0 elements parsed", 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 %s (cpu/cpuid): %s", line, err)
+		return CPUStat{}, -1, fmt.Errorf("couldn't parse %q (cpu/cpuid): %w", 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 %s (softirq): %s", line, err)
+		return SoftIRQStat{}, 0, fmt.Errorf("couldn't parse %q (softirq): %w", line, err)
 	}
 
 	return softIRQStat, total, nil
@@ -184,34 +184,34 @@ 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 %s (btime): %s", parts[1], err)
+				return Stat{}, fmt.Errorf("couldn't parse %q (btime): %w", 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 %s (intr): %s", parts[1], err)
+				return Stat{}, fmt.Errorf("couldn't parse %q (intr): %w", 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 %s (intr%d): %s", count, i, err)
+					return Stat{}, fmt.Errorf("couldn't parse %q (intr%d): %w", 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 %s (ctxt): %s", parts[1], err)
+				return Stat{}, fmt.Errorf("couldn't parse %q (ctxt): %w", 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 %s (processes): %s", parts[1], err)
+				return Stat{}, fmt.Errorf("couldn't parse %q (processes): %w", 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 %s (procs_running): %s", parts[1], err)
+				return Stat{}, fmt.Errorf("couldn't parse %q (procs_running): %w", 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 %s (procs_blocked): %s", parts[1], err)
+				return Stat{}, fmt.Errorf("couldn't parse %q (procs_blocked): %w", parts[1], err)
 			}
 		case parts[0] == "softirq":
 			softIRQStats, total, err := parseSoftIRQStat(line)
@@ -237,7 +237,7 @@ func (fs FS) Stat() (Stat, error) {
 	}
 
 	if err := scanner.Err(); err != nil {
-		return Stat{}, fmt.Errorf("couldn't parse %s: %s", fileName, err)
+		return Stat{}, fmt.Errorf("couldn't parse %q: %w", fileName, err)
 	}
 
 	return stat, nil

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

@@ -112,8 +112,7 @@ func (fs FS) NewXfrmStat() (XfrmStat, error) {
 		fields := strings.Fields(s.Text())
 
 		if len(fields) != 2 {
-			return XfrmStat{}, fmt.Errorf(
-				"couldn't parse %s line %s", file.Name(), s.Text())
+			return XfrmStat{}, fmt.Errorf("couldn't parse %q line %q", file.Name(), s.Text())
 		}
 
 		name := fields[0]

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

@@ -74,11 +74,11 @@ var nodeZoneRE = regexp.MustCompile(`(\d+), zone\s+(\w+)`)
 func (fs FS) Zoneinfo() ([]Zoneinfo, error) {
 	data, err := ioutil.ReadFile(fs.proc.Path("zoneinfo"))
 	if err != nil {
-		return nil, fmt.Errorf("error reading zoneinfo %s: %s", fs.proc.Path("zoneinfo"), err)
+		return nil, fmt.Errorf("error reading zoneinfo %q: %w", fs.proc.Path("zoneinfo"), err)
 	}
 	zoneinfo, err := parseZoneinfo(data)
 	if err != nil {
-		return nil, fmt.Errorf("error parsing zoneinfo %s: %s", fs.proc.Path("zoneinfo"), err)
+		return nil, fmt.Errorf("error parsing zoneinfo %q: %w", fs.proc.Path("zoneinfo"), err)
 	}
 	return zoneinfo, nil
 }
@@ -99,7 +99,6 @@ func parseZoneinfo(zoneinfoData []byte) ([]Zoneinfo, error) {
 				continue
 			}
 			if strings.HasPrefix(strings.TrimSpace(line), "per-node stats") {
-				zoneinfoElement.Zone = ""
 				continue
 			}
 			parts := strings.Fields(strings.TrimSpace(line))