[PATCH 4.13 138/160] Btrfs: fix overlap of fs_info::flags values

From: Greg Kroah-Hartman
Date: Tue Oct 10 2017 - 16:13:40 EST


4.13-stable review patch. If anyone has any objections, please let me know.

------------------

From: Tsutomu Itoh <t-itoh@xxxxxxxxxxxxxx>

commit 69ad59767d094752c23c0fc180a79532fde073d0 upstream.

Because the values of BTRFS_FS_EXCL_OP and BTRFS_FS_QUOTA_OVERRIDE overlap,
we should change the value.

First, BTRFS_FS_EXCL_OP was set to 14.

commit 171938e52807 ("btrfs: track exclusive filesystem operation in flags")

Next, the value of BTRFS_FS_QUOTA_OVERRIDE was set to 14.

commit f29efe292198 ("btrfs: add quota override flag to enable quota override for CAP_SYS_RESOURCE")

As a result, the value 14 overlapped, by accident.
This problem is solved by defining the value of BTRFS_FS_EXCL_OP as 16,
the flags are internal.

Fixes: f29efe292198 ("btrfs: add quota override flag to enable quota override for CAP_SYS_RESOURCE")
Signed-off-by: Tsutomu Itoh <t-itoh@xxxxxxxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
[ minimize the change, update only BTRFS_FS_EXCL_OP ]
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
fs/btrfs/ctree.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -723,7 +723,7 @@ struct btrfs_delayed_root;
* Indicate that a whole-filesystem exclusive operation is running
* (device replace, resize, device add/delete, balance)
*/
-#define BTRFS_FS_EXCL_OP 14
+#define BTRFS_FS_EXCL_OP 16

struct btrfs_fs_info {
u8 fsid[BTRFS_FSID_SIZE];