mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
58 lines
1.9 KiB
OCaml
58 lines
1.9 KiB
OCaml
(* guestfs-inspection
|
|
* Copyright (C) 2009-2025 Red Hat Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*)
|
|
|
|
open Unix
|
|
|
|
open Utils
|
|
|
|
(* Convert a non-canonical LV path like /dev/mapper/vg-lv or /dev/dm-0
|
|
* to a canonical one.
|
|
*
|
|
* This is harder than it should be. A LV device like /dev/VG/LV is
|
|
* really a symlink to a device-mapper device like /dev/dm-0. However
|
|
* at the device-mapper (kernel) level, nothing is really known about
|
|
* LVM (a userspace concept). Therefore we use a convoluted method to
|
|
* determine this, by listing out known LVs and checking whether the
|
|
* rdev (major/minor) of the device we are passed matches any of them.
|
|
*
|
|
* Note use of 'stat' instead of 'lstat' so that symlinks are fully
|
|
* resolved.
|
|
*)
|
|
let lv_canonical device =
|
|
let stat1 =
|
|
try Some (stat device)
|
|
with Unix_error (ENOENT, _, _) -> None in
|
|
match stat1 with
|
|
| None -> None
|
|
| Some stat1 ->
|
|
let lvs = Lvm.lvs () in
|
|
try
|
|
Some (
|
|
List.find (
|
|
fun lv ->
|
|
let stat2 =
|
|
try Some (stat lv)
|
|
with Unix_error (ENOENT, _, _) -> None in
|
|
match stat2 with
|
|
| Some stat2 -> stat1.st_rdev = stat2.st_rdev
|
|
| None -> false
|
|
) lvs
|
|
)
|
|
with
|
|
| Not_found -> None
|