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moby--moby/daemon/volumes_linux.go
John Howard 71eadd4176 Windows: Fix PR13278 compile break
Signed-off-by: John Howard <jhoward@microsoft.com>
2015-06-08 13:47:09 -07:00

102 lines
2.4 KiB
Go

// +build !windows
package daemon
import (
"os"
"path/filepath"
"sort"
"strings"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/daemon/execdriver"
"github.com/docker/docker/pkg/system"
)
// copyOwnership copies the permissions and uid:gid of the source file
// into the destination file
func copyOwnership(source, destination string) error {
stat, err := system.Stat(source)
if err != nil {
return err
}
if err := os.Chown(destination, int(stat.Uid()), int(stat.Gid())); err != nil {
return err
}
return os.Chmod(destination, os.FileMode(stat.Mode()))
}
func (container *Container) setupMounts() ([]execdriver.Mount, error) {
var mounts []execdriver.Mount
for _, m := range container.MountPoints {
path, err := m.Setup()
if err != nil {
return nil, err
}
mounts = append(mounts, execdriver.Mount{
Source: path,
Destination: m.Destination,
Writable: m.RW,
})
}
mounts = sortMounts(mounts)
return append(mounts, container.networkMounts()...), nil
}
func sortMounts(m []execdriver.Mount) []execdriver.Mount {
sort.Sort(mounts(m))
return m
}
type mounts []execdriver.Mount
func (m mounts) Len() int {
return len(m)
}
func (m mounts) Less(i, j int) bool {
return m.parts(i) < m.parts(j)
}
func (m mounts) Swap(i, j int) {
m[i], m[j] = m[j], m[i]
}
func (m mounts) parts(i int) int {
return len(strings.Split(filepath.Clean(m[i].Destination), string(os.PathSeparator)))
}
// migrateVolume moves the contents of a volume created pre Docker 1.7
// to the location expected by the local driver. Steps:
// 1. Save old directory that includes old volume's config json file.
// 2. Move virtual directory with content to where the local driver expects it to be.
// 3. Remove the backup of the old volume config.
func (daemon *Daemon) migrateVolume(id, vfs string) error {
volumeInfo := filepath.Join(daemon.root, defaultVolumesPathName, id)
backup := filepath.Join(daemon.root, defaultVolumesPathName, id+".back")
var err error
if err = os.Rename(volumeInfo, backup); err != nil {
return err
}
defer func() {
// Put old configuration back in place in case one of the next steps fails.
if err != nil {
os.Rename(backup, volumeInfo)
}
}()
if err = os.Rename(vfs, volumeInfo); err != nil {
return err
}
if err = os.RemoveAll(backup); err != nil {
logrus.Errorf("Unable to remove volume info backup directory %s: %v", backup, err)
}
return nil
}