package debian import ( "errors" "sort" "strings" "time" "github.com/Masterminds/semver" "github.com/rs/zerolog/log" "code.dumpstack.io/tools/out-of-tree/cache" "code.dumpstack.io/tools/out-of-tree/config" "code.dumpstack.io/tools/out-of-tree/distro/debian/snapshot" "code.dumpstack.io/tools/out-of-tree/fs" ) type DebianKernelVersion struct { // linux-headers-4.17.0-2-amd64_4.17.14-1_amd64.deb // Package version, e.g. "4.17.14-1" // See tags in https://salsa.debian.org/kernel-team/linux Package string // ABI version, e.g. "4.17.0-2" ABI string } type DebianKernel struct { Version DebianKernelVersion Image snapshot.Package Headers []snapshot.Package Dependencies []snapshot.Package // FIXME There is a better way Internal struct { Invalid bool LastFetch time.Time } } func (dk DebianKernel) HasDependency(pkgname string) bool { for _, deppkg := range dk.Dependencies { if strings.Contains(deppkg.Name, pkgname) { return true } } return false } // use only for inline comparison func kver(ver string) *semver.Version { ver = strings.Replace(ver, "~", "-", -1) ver = strings.Replace(ver, "+", "-", -1) return semver.MustParse(ver) } var ( ErrNoBinaryPackages = errors.New("no binary packages found") ErrNoHeadersPackage = errors.New("no headers package found") ErrNoImagePackage = errors.New("no image package found") ) func GetDebianKernel(version string) (dk DebianKernel, err error) { dk.Version.Package = version regex := `^(linux-(image|headers)-[a-z+~0-9\.\-]*-(common|amd64|amd64-unsigned)|linux-kbuild-.*)$` filter := []string{ "rt-amd64", "cloud-amd64", "all-amd64", "dbg", } packages, err := snapshot.Packages("linux", version, regex, []string{"amd64", "all"}, filter) if err != nil { return } if len(packages) == 0 { err = ErrNoBinaryPackages return } var imageFound, headersFound bool for _, p := range packages { if strings.Contains(p.Name, "image") { imageFound = true dk.Image = p } else if strings.Contains(p.Name, "headers") { headersFound = true dk.Headers = append(dk.Headers, p) } else { dk.Dependencies = append(dk.Dependencies, p) } } if !imageFound { err = ErrNoImagePackage return } if !headersFound { err = ErrNoHeadersPackage return } s := strings.Replace(dk.Image.Name, "linux-image-", "", -1) dk.Version.ABI = strings.Replace(s, "-amd64", "", -1) return } // GetCachedKernel by deb package name func GetCachedKernel(deb string) (dk DebianKernel, err error) { c, err := NewCache(CachePath) if err != nil { log.Error().Err(err).Msg("cache") return } defer c.Close() versions, err := c.GetVersions() if err != nil { log.Error().Err(err).Msg("get source package versions from cache") return } for _, version := range versions { var tmpdk DebianKernel tmpdk, err = c.Get(version) if err != nil { continue } if deb == tmpdk.Image.Deb.Name { dk = tmpdk } for _, h := range tmpdk.Headers { if deb == h.Deb.Name { dk = tmpdk return } } } return } func kbuildVersion(versions []string, kpkgver string) string { sort.Slice(versions, func(i, j int) bool { return kver(versions[i]).GreaterThan(kver(versions[j])) }) for _, v := range versions { if v == kpkgver { return v } } ver := kver(kpkgver) // Not able to find the exact version, try similar for _, v := range versions { cver := kver(v) // It's certainly not fit for purpose if the major and // minor versions aren't the same if ver.Major() != cver.Major() { continue } if ver.Minor() != cver.Minor() { continue } // Use the first version that is newer than the kernel if ver.LessThan(cver) { continue } return v } return "" } func findKbuild(versions []string, kpkgver string) ( pkg snapshot.Package, err error) { version := kbuildVersion(versions, kpkgver) if version == "" { err = errors.New("cannot find kbuild version") return } packages, err := snapshot.Packages("linux-tools", version, `^linux-kbuild`, []string{"amd64"}, []string{"dbg"}) if err != nil { return } if len(packages) == 0 { err = errors.New("cannot find kbuild package") } pkg = packages[0] return } var ( CachePath string RefetchDays int = 14 ) func GetKernels() (kernels []DebianKernel, err error) { if CachePath == "" { CachePath = config.File("debian.cache") log.Debug().Msgf("Use default kernels cache path: %s", CachePath) if !fs.PathExists(CachePath) { log.Debug().Msgf("No cache, download") err = cache.DownloadDebianCache(CachePath) if err != nil { log.Debug().Err(err).Msg( "No remote cache, will take some time") } } } else { log.Debug().Msgf("Debian kernels cache path: %s", CachePath) } c, err := NewCache(CachePath) if err != nil { log.Error().Err(err).Msg("cache") return } defer c.Close() linuxToolsVersions, err := snapshot.SourcePackageVersions("linux-tools") if err != nil { log.Error().Err(err).Msg("get linux-tools source pkg versions") return } versions, err := snapshot.SourcePackageVersions("linux") if err != nil { log.Error().Err(err).Msg("get linux source package versions") return } err = c.PutVersions(versions) if err != nil { log.Error().Err(err).Msg("put source package versions to cache") return } for i, version := range versions { // TODO move this scope to function slog := log.With().Str("version", version).Logger() slog.Debug().Msgf("%03d/%03d", i, len(versions)) var dk DebianKernel dk, err = c.Get(version) if err == nil && !dk.Internal.Invalid { slog.Debug().Msgf("found in cache") kernels = append(kernels, dk) continue } if dk.Internal.Invalid { refetch := dk.Internal.LastFetch.AddDate(0, 0, RefetchDays) if refetch.After(time.Now()) { slog.Debug().Msgf("refetch at %v", RefetchDays) continue } } dk, err = GetDebianKernel(version) if err != nil { if err == ErrNoBinaryPackages { slog.Warn().Err(err).Msg("") } else { slog.Error().Err(err).Msg("get debian kernel") } dk.Internal.Invalid = true dk.Internal.LastFetch = time.Now() } if !dk.HasDependency("kbuild") { if !kver(dk.Version.Package).LessThan(kver("4.5-rc0")) { dk.Internal.Invalid = true dk.Internal.LastFetch = time.Now() } else { // Debian kernels prior to the 4.5 package // version did not have a kbuild built from // the linux source itself, but used the // linux-tools source package. kbuildpkg, err := findKbuild( linuxToolsVersions, dk.Version.Package, ) if err != nil { dk.Internal.Invalid = true dk.Internal.LastFetch = time.Now() } else { dk.Dependencies = append( dk.Dependencies, kbuildpkg, ) } } } err = c.Put(dk) if err != nil { slog.Error().Err(err).Msg("put to cache") return } slog.Debug().Msgf("%s cached", version) } return }