diff options
| author | Anand Jain <anand.jain@oracle.com> | 2017-08-01 18:35:08 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-10-30 12:27:55 +0100 |
| commit | ee87cf5ed9fe8e41d057f5f5c7f49c18b6d3f94c (patch) | |
| tree | 800bed282b3056062e3a160e093765c38bc096c9 /fs/btrfs/disk-io.c | |
| parent | 718dc5fade1a97cff58aa6581d05c0ab8a9fcf1d (diff) | |
btrfs: copy fsid to super_block s_uuid
We didn't copy fsid to struct super_block.s_uuid so Overlay disables
index feature with btrfs as the lower FS.
kernel: overlayfs: fs on '/lower' does not support file handles, falling back to index=off.
Fix this by publishing the fsid through struct super_block.s_uuid.
[ dsterba: I think that setting s_uuid is the last missing bit. Overlay
needs the file handle encoding support from the lower filesystem, which
is supported. Filling the whole filesystem id is correct, the subvolume
id is encoded in the file handle buffer from inside btrfs_encode_fh. ]
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index dfdab849037b..0a98567f8cfc 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2901,6 +2901,7 @@ int open_ctree(struct super_block *sb, sb->s_blocksize = sectorsize; sb->s_blocksize_bits = blksize_bits(sectorsize); + memcpy(&sb->s_uuid, fs_info->fsid, BTRFS_FSID_SIZE); mutex_lock(&fs_info->chunk_mutex); ret = btrfs_read_sys_array(fs_info); |