diff options
Diffstat (limited to 'vendor/github.com')
8 files changed, 131 insertions, 42 deletions
diff --git a/vendor/github.com/containers/storage/drivers/chown_unix.go b/vendor/github.com/containers/storage/drivers/chown_unix.go index 84c5b1bd7..65756d8ec 100644 --- a/vendor/github.com/containers/storage/drivers/chown_unix.go +++ b/vendor/github.com/containers/storage/drivers/chown_unix.go @@ -21,12 +21,12 @@ type inode struct { type platformChowner struct { mutex sync.Mutex - inodes map[inode]bool + inodes map[inode]string } func newLChowner() *platformChowner { return &platformChowner{ - inodes: make(map[inode]bool), + inodes: make(map[inode]string), } } @@ -40,15 +40,33 @@ func (c *platformChowner) LChown(path string, info os.FileInfo, toHost, toContai Dev: uint64(st.Dev), Ino: uint64(st.Ino), } + c.mutex.Lock() - _, found := c.inodes[i] + + oldTarget, found := c.inodes[i] if !found { - c.inodes[i] = true + c.inodes[i] = path + } + + // If we are dealing with a file with multiple links then keep the lock until the file is + // chowned to avoid a race where we link to the old version if the file is copied up. + if found || st.Nlink > 1 { + defer c.mutex.Unlock() + } else { + c.mutex.Unlock() } - c.mutex.Unlock() if found { - return nil + // If the dev/inode was already chowned then create a link to the old target instead + // of chowning it again. This is necessary when the underlying file system breaks + // inodes on copy-up (as it is with overlay with index=off) to maintain the original + // link and correct file ownership. + + // The target already exists so remove it before creating the link to the new target. + if err := os.Remove(path); err != nil { + return err + } + return os.Link(oldTarget, path) } // Map an on-disk UID/GID pair from host to container diff --git a/vendor/github.com/containers/storage/drivers/driver_linux.go b/vendor/github.com/containers/storage/drivers/driver_linux.go index 0fe3eea7a..7c527d279 100644 --- a/vendor/github.com/containers/storage/drivers/driver_linux.go +++ b/vendor/github.com/containers/storage/drivers/driver_linux.go @@ -1,3 +1,4 @@ +//go:build linux // +build linux package graphdriver @@ -162,11 +163,32 @@ func (c *defaultChecker) IsMounted(path string) bool { return m } +// isMountPoint checks that the given path is a mount point +func isMountPoint(mountPath string) (bool, error) { + // it is already the root + if mountPath == "/" { + return true, nil + } + + var s1, s2 unix.Stat_t + if err := unix.Stat(mountPath, &s1); err != nil { + return true, err + } + if err := unix.Stat(filepath.Dir(mountPath), &s2); err != nil { + return true, err + } + return s1.Dev != s2.Dev, nil +} + // Mounted checks if the given path is mounted as the fs type func Mounted(fsType FsMagic, mountPath string) (bool, error) { var buf unix.Statfs_t + if err := unix.Statfs(mountPath, &buf); err != nil { return false, err } - return FsMagic(buf.Type) == fsType, nil + if FsMagic(buf.Type) != fsType { + return false, nil + } + return isMountPoint(mountPath) } diff --git a/vendor/github.com/containers/storage/pkg/idtools/idtools_supported.go b/vendor/github.com/containers/storage/pkg/idtools/idtools_supported.go index 6e6e3b22b..c96465369 100644 --- a/vendor/github.com/containers/storage/pkg/idtools/idtools_supported.go +++ b/vendor/github.com/containers/storage/pkg/idtools/idtools_supported.go @@ -1,8 +1,10 @@ +//go:build linux && cgo && libsubid // +build linux,cgo,libsubid package idtools import ( + "os/user" "unsafe" "github.com/pkg/errors" @@ -32,19 +34,34 @@ import "C" func readSubid(username string, isUser bool) (ranges, error) { var ret ranges + uidstr := "" + if username == "ALL" { return nil, errors.New("username ALL not supported") } + if u, err := user.Lookup(username); err == nil { + uidstr = u.Uid + } + cUsername := C.CString(username) defer C.free(unsafe.Pointer(cUsername)) + cuidstr := C.CString(uidstr) + defer C.free(unsafe.Pointer(cuidstr)) + var nRanges C.int var cRanges *C.struct_subid_range if isUser { nRanges = C.subid_get_uid_ranges(cUsername, &cRanges) + if nRanges <= 0 { + nRanges = C.subid_get_uid_ranges(cuidstr, &cRanges) + } } else { nRanges = C.subid_get_gid_ranges(cUsername, &cRanges) + if nRanges <= 0 { + nRanges = C.subid_get_gid_ranges(cuidstr, &cRanges) + } } if nRanges < 0 { return nil, errors.New("cannot read subids") diff --git a/vendor/github.com/containers/storage/pkg/lockfile/lockfile_unix.go b/vendor/github.com/containers/storage/pkg/lockfile/lockfile_unix.go index fc080acbe..aa843920f 100644 --- a/vendor/github.com/containers/storage/pkg/lockfile/lockfile_unix.go +++ b/vendor/github.com/containers/storage/pkg/lockfile/lockfile_unix.go @@ -1,15 +1,19 @@ +//go:build linux || solaris || darwin || freebsd // +build linux solaris darwin freebsd package lockfile import ( + "bytes" + cryptorand "crypto/rand" + "encoding/binary" "fmt" "os" "path/filepath" "sync" + "sync/atomic" "time" - "github.com/containers/storage/pkg/stringid" "github.com/containers/storage/pkg/system" "github.com/pkg/errors" "golang.org/x/sys/unix" @@ -23,13 +27,44 @@ type lockfile struct { counter int64 file string fd uintptr - lw string + lw []byte // "last writer"-unique value valid as of the last .Touch() or .Modified(), generated by newLastWriterID() locktype int16 locked bool ro bool recursive bool } +const lastWriterIDSize = 64 // This must be the same as len(stringid.GenerateRandomID) +var lastWriterIDCounter uint64 // Private state for newLastWriterID + +// newLastWriterID returns a new "last writer" ID. +// The value must be different on every call, and also differ from values +// generated by other processes. +func newLastWriterID() []byte { + // The ID is (PID, time, per-process counter, random) + // PID + time represents both a unique process across reboots, + // and a specific time within the process; the per-process counter + // is an extra safeguard for in-process concurrency. + // The random part disambiguates across process namespaces + // (where PID values might collide), serves as a general-purpose + // extra safety, _and_ is used to pad the output to lastWriterIDSize, + // because other versions of this code exist and they don't work + // efficiently if the size of the value changes. + pid := os.Getpid() + tm := time.Now().UnixNano() + counter := atomic.AddUint64(&lastWriterIDCounter, 1) + + res := make([]byte, lastWriterIDSize) + binary.LittleEndian.PutUint64(res[0:8], uint64(tm)) + binary.LittleEndian.PutUint64(res[8:16], counter) + binary.LittleEndian.PutUint32(res[16:20], uint32(pid)) + if n, err := cryptorand.Read(res[20:lastWriterIDSize]); err != nil || n != lastWriterIDSize-20 { + panic(err) // This shouldn't happen + } + + return res +} + // openLock opens the file at path and returns the corresponding file // descriptor. Note that the path is opened read-only when ro is set. If ro // is unset, openLock will open the path read-write and create the file if @@ -89,7 +124,7 @@ func createLockerForPath(path string, ro bool) (Locker, error) { stateMutex: &sync.Mutex{}, rwMutex: &sync.RWMutex{}, file: path, - lw: stringid.GenerateRandomID(), + lw: newLastWriterID(), locktype: int16(locktype), locked: false, ro: ro}, nil @@ -212,13 +247,12 @@ func (l *lockfile) Touch() error { panic("attempted to update last-writer in lockfile without the write lock") } defer l.stateMutex.Unlock() - l.lw = stringid.GenerateRandomID() - id := []byte(l.lw) - n, err := unix.Pwrite(int(l.fd), id, 0) + l.lw = newLastWriterID() + n, err := unix.Pwrite(int(l.fd), l.lw, 0) if err != nil { return err } - if n != len(id) { + if n != len(l.lw) { return unix.ENOSPC } return nil @@ -228,21 +262,21 @@ func (l *lockfile) Touch() error { // was loaded. func (l *lockfile) Modified() (bool, error) { l.stateMutex.Lock() - id := []byte(l.lw) if !l.locked { panic("attempted to check last-writer in lockfile without locking it first") } defer l.stateMutex.Unlock() - n, err := unix.Pread(int(l.fd), id, 0) + currentLW := make([]byte, len(l.lw)) + n, err := unix.Pread(int(l.fd), currentLW, 0) if err != nil { return true, err } - if n != len(id) { + if n != len(l.lw) { return true, nil } - lw := l.lw - l.lw = string(id) - return l.lw != lw, nil + oldLW := l.lw + l.lw = currentLW + return !bytes.Equal(currentLW, oldLW), nil } // IsReadWriteLock indicates if the lock file is a read-write lock. diff --git a/vendor/github.com/containers/storage/pkg/stringid/stringid.go b/vendor/github.com/containers/storage/pkg/stringid/stringid.go index a0c7c42a0..4c434f0e5 100644 --- a/vendor/github.com/containers/storage/pkg/stringid/stringid.go +++ b/vendor/github.com/containers/storage/pkg/stringid/stringid.go @@ -12,6 +12,7 @@ import ( "regexp" "strconv" "strings" + "sync" "time" ) @@ -20,6 +21,9 @@ const shortLen = 12 var ( validShortID = regexp.MustCompile("^[a-f0-9]{12}$") validHex = regexp.MustCompile(`^[a-f0-9]{64}$`) + + rngLock sync.Mutex + rng *rand.Rand // A RNG with seeding properties we control. It can only be accessed with randLock held. ) // IsShortID determines if an arbitrary string *looks like* a short ID. @@ -67,7 +71,9 @@ func GenerateRandomID() string { // secure sources of random. // It helps you to save entropy. func GenerateNonCryptoID() string { - return generateID(readerFunc(rand.Read)) + rngLock.Lock() + defer rngLock.Unlock() + return generateID(readerFunc(rng.Read)) } // ValidateID checks whether an ID string is a valid image ID. @@ -79,7 +85,7 @@ func ValidateID(id string) error { } func init() { - // safely set the seed globally so we generate random ids. Tries to use a + // Initialize a private RNG so we generate random ids. Tries to use a // crypto seed before falling back to time. var seed int64 if cryptoseed, err := cryptorand.Int(cryptorand.Reader, big.NewInt(math.MaxInt64)); err != nil { @@ -89,7 +95,7 @@ func init() { seed = cryptoseed.Int64() } - rand.Seed(seed) + rng = rand.New(rand.NewSource(seed)) } type readerFunc func(p []byte) (int, error) diff --git a/vendor/github.com/containers/storage/pkg/system/meminfo_unsupported.go b/vendor/github.com/containers/storage/pkg/system/meminfo_unsupported.go index 8d14fe9f8..0f9feb1d2 100644 --- a/vendor/github.com/containers/storage/pkg/system/meminfo_unsupported.go +++ b/vendor/github.com/containers/storage/pkg/system/meminfo_unsupported.go @@ -1,5 +1,8 @@ -//go:build !linux && !windows && !solaris && !freebsd -// +build !linux,!windows,!solaris,!freebsd +//go:build !linux && !windows && !solaris && !(freebsd && cgo) +// +build !linux +// +build !windows +// +build !solaris +// +build !freebsd !cgo package system diff --git a/vendor/github.com/containers/storage/store.go b/vendor/github.com/containers/storage/store.go index 6bc104f19..4b074eea2 100644 --- a/vendor/github.com/containers/storage/store.go +++ b/vendor/github.com/containers/storage/store.go @@ -21,7 +21,6 @@ import ( "github.com/containers/storage/pkg/idtools" "github.com/containers/storage/pkg/ioutils" "github.com/containers/storage/pkg/parsers" - "github.com/containers/storage/pkg/stringid" "github.com/containers/storage/pkg/stringutils" "github.com/containers/storage/pkg/system" "github.com/containers/storage/types" @@ -1016,9 +1015,6 @@ func (s *store) PutLayer(id, parent string, names []string, mountLabel string, w if err := rcstore.ReloadIfChanged(); err != nil { return nil, -1, err } - if id == "" { - id = stringid.GenerateRandomID() - } if options == nil { options = &LayerOptions{} } @@ -1097,10 +1093,6 @@ func (s *store) CreateLayer(id, parent string, names []string, mountLabel string } func (s *store) CreateImage(id string, names []string, layer, metadata string, options *ImageOptions) (*Image, error) { - if id == "" { - id = stringid.GenerateRandomID() - } - if layer != "" { lstore, err := s.LayerStore() if err != nil { @@ -1279,9 +1271,6 @@ func (s *store) CreateContainer(id string, names []string, image, layer, metadat if err != nil { return nil, err } - if id == "" { - id = stringid.GenerateRandomID() - } var imageTopLayer *Layer imageID := "" @@ -1337,14 +1326,14 @@ func (s *store) CreateContainer(id string, names []string, image, layer, metadat } } if cimage == nil { - return nil, errors.Wrapf(ErrImageUnknown, "error locating image with ID %q", id) + return nil, errors.Wrapf(ErrImageUnknown, "error locating image with ID %q", image) } imageID = cimage.ID } if options.AutoUserNs { var err error - options.UIDMap, options.GIDMap, err = s.getAutoUserNS(id, &options.AutoUserNsOpts, cimage) + options.UIDMap, options.GIDMap, err = s.getAutoUserNS(&options.AutoUserNsOpts, cimage) if err != nil { return nil, err } diff --git a/vendor/github.com/containers/storage/userns.go b/vendor/github.com/containers/storage/userns.go index 523c92dc8..13ebd4021 100644 --- a/vendor/github.com/containers/storage/userns.go +++ b/vendor/github.com/containers/storage/userns.go @@ -124,7 +124,7 @@ func parseMountedFiles(containerMount, passwdFile, groupFile string) uint32 { // getMaxSizeFromImage returns the maximum ID used by the specified image. // The layer stores must be already locked. -func (s *store) getMaxSizeFromImage(id string, image *Image, passwdFile, groupFile string) (uint32, error) { +func (s *store) getMaxSizeFromImage(image *Image, passwdFile, groupFile string) (uint32, error) { lstore, err := s.LayerStore() if err != nil { return 0, err @@ -183,7 +183,7 @@ outer: // We need to create a temporary layer so we can mount it and lookup the // maximum IDs used. - clayer, err := rlstore.Create(id, topLayer, nil, "", nil, layerOptions, false) + clayer, err := rlstore.Create("", topLayer, nil, "", nil, layerOptions, false) if err != nil { return 0, err } @@ -211,7 +211,7 @@ outer: } // getAutoUserNS creates an automatic user namespace -func (s *store) getAutoUserNS(id string, options *types.AutoUserNsOptions, image *Image) ([]idtools.IDMap, []idtools.IDMap, error) { +func (s *store) getAutoUserNS(options *types.AutoUserNsOptions, image *Image) ([]idtools.IDMap, []idtools.IDMap, error) { requestedSize := uint32(0) initialSize := uint32(1) if options.Size > 0 { @@ -250,7 +250,7 @@ func (s *store) getAutoUserNS(id string, options *types.AutoUserNsOptions, image size = s.autoNsMinSize } if image != nil { - sizeFromImage, err := s.getMaxSizeFromImage(id, image, options.PasswdFile, options.GroupFile) + sizeFromImage, err := s.getMaxSizeFromImage(image, options.PasswdFile, options.GroupFile) if err != nil { return nil, nil, err } |