btrfs-progs: Introduce function to fix super block total bytes

Recent kernel (starting from v4.6) will refuse to mount if super block
total bytes is smaller than all devices' size.

This makes end user unable to do anything to their otherwise quite
healthy fs.

To fix such problem, introduce repair function to fix it on an unmounted
filesystem.

Reported-by: Asif Youssuff <yoasif@gmail.com>
Reported-by: Rich Rauenzahn <rrauenza@gmail.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/volumes.h b/volumes.h
index 89bd4aa8..d5bb5f86 100644
--- a/volumes.h
+++ b/volumes.h
@@ -247,4 +247,5 @@ u64 btrfs_stripe_length(struct btrfs_fs_info *fs_info,
 			struct btrfs_chunk *chunk);
 int btrfs_fix_device_size(struct btrfs_fs_info *fs_info,
 			  struct btrfs_device *device);
+int btrfs_fix_super_size(struct btrfs_fs_info *fs_info);
 #endif