[Libguestfs] [PATCH 1/3] mllib: add checking for btrfs subvolume

This is needed to skip btrfs subvolumes from output of list_filesystems where device is needed. --- mllib/common_utils.ml | 10 ++++++++++ mllib/common_utils.mli | 3 +++ 2 files changed, 13 insertions(+) diff --git a/mllib/common_utils.ml b/mllib/common_utils.ml index 77b9acd..30fc5cd 100644 --- a/mllib/common_utils.ml +++ b/mllib/common_utils.ml @@ -922,3 +922,13 @@ let inspect_mount_root g ?mount_opts_fn root = let inspect_mount_root_ro = inspect_mount_root ~mount_opts_fn:(fun _ -> "ro") + +let is_btrfs_subvolume g fs = + let device = g#mountable_device fs in + let subvol = + try + g#mountable_subvolume fs + with Guestfs.Error msg as exn -> + if g#last_errno () = Guestfs.Errno.errno_EINVAL then "" + else raise exn in + device <> "" && subvol <> "" diff --git a/mllib/common_utils.mli b/mllib/common_utils.mli index 5b0b9bb..d2ed30c 100644 --- a/mllib/common_utils.mli +++ b/mllib/common_utils.mli @@ -330,3 +330,6 @@ val inspect_mount_root : Guestfs.guestfs -> ?mount_opts_fn:(string -> string) -> val inspect_mount_root_ro : Guestfs.guestfs -> string -> unit (** Like [inspect_mount_root], but mounting every mount point as read-only. *) + +val is_btrfs_subvolume : Guestfs.guestfs -> string -> bool +(** Checks if a filesystem is a btrfs subvolume. *) -- 1.8.3.1