package mount import ( "sort" "strings" "github.com/sirupsen/logrus" ) // GetMounts retrieves a list of mounts for the current running process. func GetMounts() ([]*Info, error) { return parseMountTable() } // Mounted determines if a specified mountpoint has been mounted. // On Linux it looks at /proc/self/mountinfo. func Mounted(mountpoint string) (bool, error) { entries, err := parseMountTable() if err != nil { return false, err } // Search the table for the mountpoint for _, e := range entries { if e.Mountpoint == mountpoint { return true, nil } } return false, nil } // Mount will mount filesystem according to the specified configuration, on the // condition that the target path is *not* already mounted. Options must be // specified like the mount or fstab unix commands: "opt1=val1,opt2=val2". See // flags.go for supported option flags. func Mount(device, target, mType, options string) error { flag, _ := parseOptions(options) if flag&REMOUNT != REMOUNT { if mounted, err := Mounted(target); err != nil || mounted { return err } } return ForceMount(device, target, mType, options) } // ForceMount will mount a filesystem according to the specified configuration, // *regardless* if the target path is not already mounted. Options must be // specified like the mount or fstab unix commands: "opt1=val1,opt2=val2". See // flags.go for supported option flags. func ForceMount(device, target, mType, options string) error { flag, data := parseOptions(options) return mount(device, target, mType, uintptr(flag), data) } // Unmount lazily unmounts a filesystem on supported platforms, otherwise // does a normal unmount. func Unmount(target string) error { if mounted, err := Mounted(target); err != nil || !mounted { return err } return unmount(target, mntDetach) } // RecursiveUnmount unmounts the target and all mounts underneath, starting with // the deepsest mount first. func RecursiveUnmount(target string) error { mounts, err := GetMounts() if err != nil { return err } // Make the deepest mount be first sort.Sort(sort.Reverse(byMountpoint(mounts))) for i, m := range mounts { if !strings.HasPrefix(m.Mountpoint, target) { continue } logrus.Debugf("Trying to unmount %s", m.Mountpoint) err = Unmount(m.Mountpoint) if err != nil && i == len(mounts)-1 { if mounted, err := Mounted(m.Mountpoint); err != nil || mounted { return err } // Ignore errors for submounts and continue trying to unmount others // The final unmount should fail if there ane any submounts remaining } else if err != nil { logrus.Errorf("Failed to unmount %s: %v", m.Mountpoint, err) } else if err == nil { logrus.Debugf("Unmounted %s", m.Mountpoint) } } return nil }