Commit b68dc2a9 authored Aug 29, 2011 by Mark Fasheh Committed by David Sterba Mar 22, 2012

btrfs: Don't BUG_ON errors from update_ref_for_cow()



__btrfs_cow_block(), the only caller of update_ref_for_cow() will BUG_ON()
any error return.  Instead, we can go read-only fs as update_ref_for_cow()
manipulates disk data in a way which doesn't look like it's easily rolled
back.

Signed-off-by: Mark Fasheh <mfasheh@suse.de>

parent e5df9573

fs/btrfs/ctree.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -474,7 +474,10 @@ static noinline int __btrfs_cow_block(struct btrfs_trans_handle *trans,
		BTRFS_FSID_SIZE);

		ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);
		BUG_ON(ret);
		if (ret) {
		btrfs_std_error(root->fs_info, ret);
		return ret;
		}

		if (root->ref_cows)
		btrfs_reloc_cow_block(trans, root, buf, cow);