119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
// +build !windows
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package daemon
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import (
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"os"
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"path/filepath"
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"sort"
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"strings"
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"github.com/docker/docker/daemon/execdriver"
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"github.com/docker/docker/pkg/system"
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"github.com/docker/docker/volume"
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"github.com/docker/docker/volume/local"
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)
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// copyOwnership copies the permissions and uid:gid of the source file
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// into the destination file
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func copyOwnership(source, destination string) error {
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stat, err := system.Stat(source)
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if err != nil {
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return err
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}
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if err := os.Chown(destination, int(stat.Uid()), int(stat.Gid())); err != nil {
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return err
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}
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return os.Chmod(destination, os.FileMode(stat.Mode()))
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}
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func (container *Container) setupMounts() ([]execdriver.Mount, error) {
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var mounts []execdriver.Mount
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for _, m := range container.MountPoints {
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path, err := m.Setup()
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if err != nil {
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return nil, err
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}
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mounts = append(mounts, execdriver.Mount{
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Source: path,
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Destination: m.Destination,
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Writable: m.RW,
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})
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}
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mounts = sortMounts(mounts)
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return append(mounts, container.networkMounts()...), nil
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}
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func sortMounts(m []execdriver.Mount) []execdriver.Mount {
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sort.Sort(mounts(m))
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return m
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}
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type mounts []execdriver.Mount
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func (m mounts) Len() int {
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return len(m)
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}
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func (m mounts) Less(i, j int) bool {
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return m.parts(i) < m.parts(j)
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}
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func (m mounts) Swap(i, j int) {
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m[i], m[j] = m[j], m[i]
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}
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func (m mounts) parts(i int) int {
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return len(strings.Split(filepath.Clean(m[i].Destination), string(os.PathSeparator)))
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}
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// migrateVolume links the contents of a volume created pre Docker 1.7
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// into the location expected by the local driver.
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// It creates a symlink from DOCKER_ROOT/vfs/dir/VOLUME_ID to DOCKER_ROOT/volumes/VOLUME_ID/_container_data.
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// It preserves the volume json configuration generated pre Docker 1.7 to be able to
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// downgrade from Docker 1.7 to Docker 1.6 without losing volume compatibility.
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func migrateVolume(id, vfs string) error {
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l, err := getVolumeDriver(volume.DefaultDriverName)
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if err != nil {
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return err
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}
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newDataPath := l.(*local.Root).DataPath(id)
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fi, err := os.Stat(newDataPath)
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if err != nil && !os.IsNotExist(err) {
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return err
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}
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if fi != nil && fi.IsDir() {
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return nil
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}
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return os.Symlink(vfs, newDataPath)
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}
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// validVolumeLayout checks whether the volume directory layout
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// is valid to work with Docker post 1.7 or not.
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func validVolumeLayout(files []os.FileInfo) bool {
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if len(files) == 1 && files[0].Name() == local.VolumeDataPathName && files[0].IsDir() {
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return true
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}
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if len(files) != 2 {
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return false
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}
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for _, f := range files {
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if f.Name() == "config.json" ||
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(f.Name() == local.VolumeDataPathName && f.Mode()&os.ModeSymlink == os.ModeSymlink) {
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// Old volume configuration, we ignore it
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continue
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}
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return false
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}
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return true
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}
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