[PATCH 2/4] Btrfs-progs: fix irrelevant string in the subvol path

[Anand jain <Anand.Jain@oracle.com>]

From: Anand Jain <anand.jain@oracle.com>

btrfs su list -a /btrfs/sv1
ID 256 gen 6 top level 5 path <FS_TREE>/sv1
ID 258 gen 6 top level 5 path <FS_TREE>/ss1

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 cmds-subvolume.c |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index a33c352..f8beecc 100644
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -306,7 +306,7 @@ static int cmd_subvol_list(int argc, char **argv)
 	u64 top_id;
 	int ret;
 	int c;
-	char *subvol;
+	char *subvol, *mnt = NULL;
 	int is_tab_result = 0;
 	int is_list_all = 0;
 	struct option long_options[] = {
@@ -398,9 +398,18 @@ static int cmd_subvol_list(int argc, char **argv)
 		return 13;
 	}
 
-	fd = open_file_or_dir(subvol);
+	ret = find_mount_root(subvol, &mnt);
+	if (ret < 0) {
+		fprintf(stderr, "ERROR: find_mount_root failed on %s: "
+				"%s\n", subvol,
+			strerror(-ret));
+		return 12;
+	}
+
+	fd = open_file_or_dir(mnt);
 	if (fd < 0) {
 		fprintf(stderr, "ERROR: can't access '%s'\n", subvol);
+		free(mnt);
 		return 12;
 	}
 
@@ -412,6 +421,8 @@ static int cmd_subvol_list(int argc, char **argv)
 
 	ret = btrfs_list_subvols(fd, filter_set, comparer_set,
 				is_tab_result);
+
+	free(mnt);
 	if (ret)
 		return 19;
 	return 0;
-- 
1.7.1