| package zfs |
| |
| import ( |
| "fmt" |
| "strings" |
| |
| "github.com/docker/docker/daemon/graphdriver" |
| "github.com/sirupsen/logrus" |
| "golang.org/x/sys/unix" |
| ) |
| |
| func checkRootdirFs(rootdir string) error { |
| var buf unix.Statfs_t |
| if err := unix.Statfs(rootdir, &buf); err != nil { |
| return fmt.Errorf("Failed to access '%s': %s", rootdir, err) |
| } |
| |
| // on FreeBSD buf.Fstypename contains ['z', 'f', 's', 0 ... ] |
| if (buf.Fstypename[0] != 122) || (buf.Fstypename[1] != 102) || (buf.Fstypename[2] != 115) || (buf.Fstypename[3] != 0) { |
| logrus.Debugf("[zfs] no zfs dataset found for rootdir '%s'", rootdir) |
| return graphdriver.ErrPrerequisites |
| } |
| |
| return nil |
| } |
| |
| func getMountpoint(id string) string { |
| maxlen := 12 |
| |
| // we need to preserve filesystem suffix |
| suffix := strings.SplitN(id, "-", 2) |
| |
| if len(suffix) > 1 { |
| return id[:maxlen] + "-" + suffix[1] |
| } |
| |
| return id[:maxlen] |
| } |