|
| 1 | +package build |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "fmt" |
| 6 | + "io/ioutil" |
| 7 | + "net/http" |
| 8 | + "regexp" |
| 9 | + "strings" |
| 10 | + "text/template" |
| 11 | + |
| 12 | + "github.com/chaos-mesh/chaos-driver/buildkit/build/kernelrelease" |
| 13 | +) |
| 14 | + |
| 15 | +func init() { |
| 16 | + Targets["debian"] = &debian{} |
| 17 | +} |
| 18 | + |
| 19 | +// debian is a driverkit target. |
| 20 | +type debian struct { |
| 21 | +} |
| 22 | + |
| 23 | +// Script compiles the script to build the kernel module and/or the eBPF probe. |
| 24 | +func (v debian) Script(release string, buildDir string, _ uint16) (string, error) { |
| 25 | + t := template.New("debian-build-template") |
| 26 | + parsed, err := t.Parse(debianTemplate) |
| 27 | + if err != nil { |
| 28 | + return "", err |
| 29 | + } |
| 30 | + |
| 31 | + kr := kernelrelease.FromString(release) |
| 32 | + |
| 33 | + kurls, err := fetchDebianKernelURLS(kr) |
| 34 | + if err != nil { |
| 35 | + return "", err |
| 36 | + } |
| 37 | + |
| 38 | + urls, err := getResolvingURLS(kurls) |
| 39 | + if err != nil { |
| 40 | + return "", err |
| 41 | + } |
| 42 | + |
| 43 | + td := debianTemplateData{ |
| 44 | + DriverBuildDir: buildDir, |
| 45 | + KernelDownloadURLS: urls, |
| 46 | + KernelLocalVersion: kr.FullExtraversion, |
| 47 | + } |
| 48 | + |
| 49 | + buf := bytes.NewBuffer(nil) |
| 50 | + err = parsed.Execute(buf, td) |
| 51 | + if err != nil { |
| 52 | + return "", err |
| 53 | + } |
| 54 | + return buf.String(), nil |
| 55 | +} |
| 56 | + |
| 57 | +func fetchDebianKernelURLS(kr kernelrelease.KernelRelease) ([]string, error) { |
| 58 | + kbuildURL, err := debianKbuildURLFromRelease(kr) |
| 59 | + if err != nil { |
| 60 | + return nil, err |
| 61 | + } |
| 62 | + |
| 63 | + urls, err := debianHeadersURLFromRelease(kr) |
| 64 | + if err != nil { |
| 65 | + return nil, err |
| 66 | + } |
| 67 | + urls = append(urls, kbuildURL) |
| 68 | + |
| 69 | + return urls, nil |
| 70 | +} |
| 71 | + |
| 72 | +type debianTemplateData struct { |
| 73 | + DriverBuildDir string |
| 74 | + KernelDownloadURLS []string |
| 75 | + KernelLocalVersion string |
| 76 | +} |
| 77 | + |
| 78 | +const debianTemplate = ` |
| 79 | +#!/bin/bash |
| 80 | +set -xeuo pipefail |
| 81 | +
|
| 82 | +rm -rf /tmp/debian-build |
| 83 | +mkdir /tmp/debian-build |
| 84 | +cp -r {{ .DriverBuildDir }}/* /tmp/debian-build/ |
| 85 | +cd /tmp/debian-build |
| 86 | +
|
| 87 | +# Fetch the kernel |
| 88 | +mkdir /tmp/kernel-download |
| 89 | +cd /tmp/kernel-download |
| 90 | +
|
| 91 | +{{ range $url := .KernelDownloadURLS }} |
| 92 | +curl --silent -o kernel.deb -SL {{ $url }} |
| 93 | +ar x kernel.deb |
| 94 | +tar -xvf data.tar.xz |
| 95 | +{{ end }} |
| 96 | +
|
| 97 | +ls -la /tmp/kernel-download |
| 98 | +cd /tmp/kernel-download/ |
| 99 | +cp -r usr/* /usr |
| 100 | +cp -r lib/* /lib |
| 101 | +cd /usr/src |
| 102 | +sourcedir=$(find . -type d -name "linux-headers-*amd64" | head -n 1 | xargs readlink -f) |
| 103 | +ls -la $sourcedir |
| 104 | +
|
| 105 | +cd /tmp/debian-build |
| 106 | +
|
| 107 | +# Build the kernel module |
| 108 | +make KBUILD_PATH=$sourcedir all |
| 109 | +cp /tmp/debian-build/chaos_driver.ko {{ .DriverBuildDir }}/chaos_driver.ko |
| 110 | +` |
| 111 | + |
| 112 | +func debianHeadersURLFromRelease(kr kernelrelease.KernelRelease) ([]string, error) { |
| 113 | + baseURLS := []string{ |
| 114 | + "http://security-cdn.debian.org/pool/main/l/linux/", |
| 115 | + "http://security-cdn.debian.org/pool/updates/main/l/linux/", |
| 116 | + "https://mirrors.edge.kernel.org/debian/pool/main/l/linux/", |
| 117 | + } |
| 118 | + |
| 119 | + for _, u := range baseURLS { |
| 120 | + urls, err := fetchDebianHeadersURLFromRelease(u, kr) |
| 121 | + |
| 122 | + if err == nil { |
| 123 | + return urls, err |
| 124 | + } |
| 125 | + } |
| 126 | + |
| 127 | + return nil, fmt.Errorf("kernel headers not found") |
| 128 | +} |
| 129 | + |
| 130 | +func fetchDebianHeadersURLFromRelease(baseURL string, kr kernelrelease.KernelRelease) ([]string, error) { |
| 131 | + rmatch := `href="(linux-headers-%s\.%s\.%s-%s-(%s)_.*(amd64|all)\.deb)"` |
| 132 | + |
| 133 | + // match for kernel versions like 4.19.0-6-amd64 |
| 134 | + extraVersionPartial := strings.TrimSuffix(kr.FullExtraversion, "-amd64") |
| 135 | + matchExtraGroup := "amd64" |
| 136 | + matchExtraGroupCommon := "common" |
| 137 | + |
| 138 | + // match for kernel versions like 4.19.0-6-cloud-amd64 |
| 139 | + if strings.Contains(kr.FullExtraversion, "-cloud") { |
| 140 | + extraVersionPartial = strings.TrimSuffix(extraVersionPartial, "-cloud") |
| 141 | + matchExtraGroup = "cloud-amd64" |
| 142 | + } |
| 143 | + |
| 144 | + // download index |
| 145 | + resp, err := http.Get(baseURL) |
| 146 | + if err != nil { |
| 147 | + return nil, err |
| 148 | + } |
| 149 | + defer resp.Body.Close() |
| 150 | + body, err := ioutil.ReadAll(resp.Body) |
| 151 | + if err != nil { |
| 152 | + return nil, err |
| 153 | + } |
| 154 | + bodyStr := string(body) |
| 155 | + |
| 156 | + // look for kernel headers |
| 157 | + fullregex := fmt.Sprintf(rmatch, kr.Version, kr.PatchLevel, kr.Sublevel, extraVersionPartial, matchExtraGroup) |
| 158 | + pattern := regexp.MustCompile(fullregex) |
| 159 | + matches := pattern.FindStringSubmatch(bodyStr) |
| 160 | + if len(matches) < 1 { |
| 161 | + return nil, fmt.Errorf("kernel headers not found") |
| 162 | + } |
| 163 | + |
| 164 | + // look for kernel headers common |
| 165 | + fullregexCommon := fmt.Sprintf(rmatch, kr.Version, kr.PatchLevel, kr.Sublevel, extraVersionPartial, matchExtraGroupCommon) |
| 166 | + patternCommon := regexp.MustCompile(fullregexCommon) |
| 167 | + matchesCommon := patternCommon.FindStringSubmatch(bodyStr) |
| 168 | + if len(matchesCommon) < 1 { |
| 169 | + return nil, fmt.Errorf("kernel headers common not found") |
| 170 | + } |
| 171 | + |
| 172 | + foundURLS := []string{fmt.Sprintf("%s%s", baseURL, matches[1])} |
| 173 | + foundURLS = append(foundURLS, fmt.Sprintf("%s%s", baseURL, matchesCommon[1])) |
| 174 | + |
| 175 | + return foundURLS, nil |
| 176 | +} |
| 177 | + |
| 178 | +func debianKbuildURLFromRelease(kr kernelrelease.KernelRelease) (string, error) { |
| 179 | + rmatch := `href="(linux-kbuild-%s\.%s.*amd64\.deb)"` |
| 180 | + kbuildPattern := regexp.MustCompile(fmt.Sprintf(rmatch, kr.Version, kr.PatchLevel)) |
| 181 | + baseURL := "http://mirrors.kernel.org/debian/pool/main/l/linux/" |
| 182 | + if kr.Version == "3" { |
| 183 | + baseURL = "http://mirrors.kernel.org/debian/pool/main/l/linux-tools/" |
| 184 | + } |
| 185 | + |
| 186 | + resp, err := http.Get(baseURL) |
| 187 | + if err != nil { |
| 188 | + return "", err |
| 189 | + } |
| 190 | + defer resp.Body.Close() |
| 191 | + body, err := ioutil.ReadAll(resp.Body) |
| 192 | + if err != nil { |
| 193 | + return "", err |
| 194 | + } |
| 195 | + match := kbuildPattern.FindStringSubmatch(string(body)) |
| 196 | + |
| 197 | + if len(match) != 2 { |
| 198 | + return "", fmt.Errorf("kbuild not found") |
| 199 | + } |
| 200 | + |
| 201 | + return fmt.Sprintf("%s%s", baseURL, match[1]), nil |
| 202 | +} |
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