btrfs-progs: Add open_ctree check for uuid changing

Now open_ctree will exit if it found the superblock is marked
CHANGING_FSID, except given IGNORE_FSID open ctree flags.

Kernel will do the same thing later.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
[removed the chunk tree flag, reworded the error message]
Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 2 insertions, 0 deletions

diff --git a/disk-io.h b/disk-io.h
index 4caebeb1..19f333ed 100644
--- a/disk-io.h
+++ b/disk-io.h
@@ -49,6 +49,8 @@ enum btrfs_open_ctree_flags {
 	 * tree bits.
 	 * Like split PARTIAL into SKIP_CSUM/SKIP_EXTENT
 	 */
+
+	OPEN_CTREE_IGNORE_FSID_MISMATCH	= (1 << 10)
 };
 
 static inline u64 btrfs_sb_offset(int mirror)