diff options
author | Chris Mason <chris.mason@fusionio.com> | 2013-05-07 15:00:13 (GMT) |
---|---|---|
committer | Chris Mason <chris.mason@fusionio.com> | 2013-05-07 15:00:13 (GMT) |
commit | 667e7d94a1683661cff5fe9a0fa0d7f8fdd2c007 (patch) | |
tree | cfb87693ac910d328ab82b4723c43ebd2433f9b9 | |
parent | 1104a8855109a4051d74977f819a13b4516aa11e (diff) | |
download | linux-fsl-qoriq-667e7d94a1683661cff5fe9a0fa0d7f8fdd2c007.tar.xz |
Btrfs: allow superblock mismatch from older mkfs
We've added new checks to make sure the super block crc is correct
during mount. A fresh filesystem from an older mkfs won't have the
crc set. This adds a warning when it finds a newly created filesystem
but doesn't fail the mount.
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
-rw-r--r-- | fs/btrfs/disk-io.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index bc423f7..4e9ebe1 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -383,6 +383,11 @@ static int btrfs_check_super_csum(char *raw_disk_sb) if (memcmp(raw_disk_sb, result, csum_size)) ret = 1; + + if (ret && btrfs_super_generation(disk_sb) < 10) { + printk(KERN_WARNING "btrfs: super block crcs don't match, older mkfs detected\n"); + ret = 0; + } } if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) { |