// Init returns a new AUFS driver.
// An error is returned if AUFS is not supported.
func Init(root string, options []string, uidMaps, gidMaps []idtools.IDMap) (graphdriver.Driver, error) {
// Try to load the aufs kernel module
if err := supportsAufs(); err != nil {
return nil, graphdriver.ErrNotSupported
}
fsMagic, err := graphdriver.GetFSMagic(root)
if err != nil {
return nil, err
}
if fsName, ok := graphdriver.FsNames[fsMagic]; ok {
backingFs = fsName
}
for _, magic := range incompatibleFsMagic {
if fsMagic == magic {
return nil, graphdriver.ErrIncompatibleFS
}
}
paths := []string{
"mnt",
"diff",
"layers",
}
a := &Driver{
root: root,
active: make(map[string]*data),
uidMaps: uidMaps,
gidMaps: gidMaps,
}
rootUID, rootGID, err := idtools.GetRootUIDGID(uidMaps, gidMaps)
if err != nil {
return nil, err
}
// Create the root aufs driver dir and return
// if it already exists
// If not populate the dir structure
if err := idtools.MkdirAllAs(root, 0755, rootUID, rootGID); err != nil {
if os.IsExist(err) {
return a, nil
}
return nil, err
}
if err := mountpk.MakePrivate(root); err != nil {
return nil, err
}
// Populate the dir structure
for _, p := range paths {
if err := idtools.MkdirAllAs(path.Join(root, p), 0755, rootUID, rootGID); err != nil {
return nil, err
}
}
return a, nil
}
func Init(home string, options []string) (graphdriver.Driver, error) {
fsMagic, err := graphdriver.GetFSMagic(home)
if err != nil {
return nil, err
}
if fsName, ok := graphdriver.FsNames[fsMagic]; ok {
backingFs = fsName
}
deviceSet, err := NewDeviceSet(home, true, options)
if err != nil {
return nil, err
}
if err := mount.MakePrivate(home); err != nil {
return nil, err
}
d := &Driver{
DeviceSet: deviceSet,
home: home,
}
return graphdriver.NaiveDiffDriver(d), nil
}
func Init(home string, options []string) (graphdriver.Driver, error) {
rootdir := path.Dir(home)
var buf syscall.Statfs_t
if err := syscall.Statfs(rootdir, &buf); err != nil {
return nil, err
}
if graphdriver.FsMagic(buf.Type) != graphdriver.FsMagicBtrfs {
return nil, graphdriver.ErrPrerequisites
}
if err := os.MkdirAll(home, 0700); err != nil {
return nil, err
}
if err := mount.MakePrivate(home); err != nil {
return nil, err
}
driver := &Driver{
home: home,
}
return graphdriver.NaiveDiffDriver(driver), nil
}
func Init(home string, options []string) (graphdriver.Driver, error) {
deviceSet, err := NewDeviceSet(home, true, options)
if err != nil {
return nil, err
}
if err := mount.MakePrivate(home); err != nil {
return nil, err
}
d := &Driver{
DeviceSet: deviceSet,
home: home,
}
return graphdriver.NaiveDiffDriver(d), nil
}