Commit e56a951e authored by Liu Bo's avatar Liu Bo Committed by Chris Mason

Btrfs: Remove the check for old-style mkfs

This was used to make sure that a fresh btrfs from an older mkfs.btrfs,
but it also allows us to mount a buggy btrfs if this btrfs has the right
superblock head part but has something wrong with chunk tree part[1], and
after that we can hit BUG_ON()s set in the code to prevent something
impossible.

Since David has released "Btrfs progs v3.19-rc2", just remove the check,
if anyone who wants to make a fresh btrfs, please use the latest one.

[1]: http://www.spinics.net/lists/linux-btrfs/msg42358.htmlSigned-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
Reviewed-by: default avatarOmar Sandoval <osandov@osandov.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.cz>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent 727b9784
......@@ -419,12 +419,6 @@ 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)) {
......
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