[lxc-devel] [PATCH] show additional info if btrfs subvolume deletion fails (issue #315)

[S.Çağlar Onur]

Unprivileged users require "-o user_subvol_rm_allowed" mount option for btrfs.
Make the INFO level message to ERROR to make it clear, which now says following;

[caglar at qop:~] lxc-destroy -n rubik
lxc_container: Is the rootfs mounted with -o user_subvol_rm_allowed?
lxc_container: Error destroying rootfs for rubik
Destroying rubik failed

Signed-off-by: S.Çağlar Onur <caglar at 10ur.org>
---
 src/lxc/bdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lxc/bdev.c b/src/lxc/bdev.c
index e4b32a1..4fc10f2 100644
--- a/src/lxc/bdev.c
+++ b/src/lxc/bdev.c
@@ -1552,7 +1552,7 @@ static int btrfs_do_destroy_subvol(const char *path)
 	ret = ioctl(fd, BTRFS_IOC_SNAP_DESTROY, &args);
 	INFO("btrfs: snapshot destroy ioctl returned %d for %s", ret, path);
 	if (ret < 0 && errno == EPERM)
-		INFO("Is the rootfs mounted with -o user_subvol_rm_allowed?");
+		ERROR("Is the rootfs mounted with -o user_subvol_rm_allowed?");
 
 	free(newfull);
 	close(fd);
-- 
1.9.1