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authorMiao Xie <miaox@cn.fujitsu.com>2010-02-02 08:46:44 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-13 13:20:11 -0700
commit4c324840d6c06406e1f05e12952c050c4e84ce95 (patch)
tree9ada20732625bc8b1fbfa6a9fda5e58f3290e5c0
parentcaf32f2c7d0f78eead8cb38a86dfa1bff6ded600 (diff)
Btrfs: remove BUG_ON() due to mounting bad filesystem
commit d7ce5843bb28ada6845ab2ae8510ba3f12d33154 upstream. Mounting a bad filesystem caused a BUG_ON(). The following is steps to reproduce it. # mkfs.btrfs /dev/sda2 # mount /dev/sda2 /mnt # mkfs.btrfs /dev/sda1 /dev/sda2 (the program says that /dev/sda2 was mounted, and then exits. ) # umount /mnt # mount /dev/sda1 /mnt At the third step, mkfs.btrfs exited in the way of make filesystem. So the initialization of the filesystem didn't finish. So the filesystem was bad, and it caused BUG_ON() when mounting it. But BUG_ON() should be called by the wrong code, not user's operation, so I think it is a bug of btrfs. This patch fixes it. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com> Acked-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--fs/btrfs/disk-io.c7
-rw-r--r--fs/btrfs/relocation.c3
2 files changed, 8 insertions, 2 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 87b25543d7d1..2b59201b955c 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1982,7 +1982,12 @@ struct btrfs_root *open_ctree(struct super_block *sb,
if (!(sb->s_flags & MS_RDONLY)) {
ret = btrfs_recover_relocation(tree_root);
- BUG_ON(ret);
+ if (ret < 0) {
+ printk(KERN_WARNING
+ "btrfs: failed to recover relocation\n");
+ err = -EINVAL;
+ goto fail_trans_kthread;
+ }
}
location.objectid = BTRFS_FS_TREE_OBJECTID;
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index ed3e4a2ec2c8..ab7ab5318745 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3764,7 +3764,8 @@ out:
BTRFS_DATA_RELOC_TREE_OBJECTID);
if (IS_ERR(fs_root))
err = PTR_ERR(fs_root);
- btrfs_orphan_cleanup(fs_root);
+ else
+ btrfs_orphan_cleanup(fs_root);
}
return err;
}