From e56a951e01bf55f49533c47ad2ce61dbd613a3f3 Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Tue, 17 Mar 2015 14:34:16 +0800 Subject: [PATCH] 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.html Signed-off-by: Liu Bo Reviewed-by: Omar Sandoval Reviewed-by: David Sterba Signed-off-by: Chris Mason --- fs/btrfs/disk-io.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 23c49ab2de4c..568cc4e3d80e 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -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)) { -- 2.39.2