[PATCH V3 3/7] Btrfs-progs: fix wrong usage of btrfs subvolume list command

[Miao Xie <miaox@cn.fujitsu.com>]

Since the uuid output function has been implemented, we should update
the usage to tell the users.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
---
Changelog v1 -> v3:
- new patch
---
 cmds-subvolume.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index ffc5d95..cd4b5a7 100644
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -258,10 +258,11 @@ static int cmd_subvol_delete(int argc, char **argv)
 }
 
 static const char * const cmd_subvol_list_usage[] = {
-	"btrfs subvolume list [-ps] <path>",
+	"btrfs subvolume list [-pu] [-s 0|1] <path>",
 	"List subvolumes (and snapshots)",
 	"",
 	"-p           print parent ID",
+	"-u           print the uuid of subvolumes (and snapshots)",
 	"-s value     list snapshots with generation in ascending/descending order",
 	"             (1: ascending, 0: descending)",
 	NULL
-- 
1.7.6.5