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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>
This commit is contained in:
Mark Fasheh 2011-08-29 14:30:39 -07:00 committed by David Sterba
parent e5df957328
commit b68dc2a93e
1 changed files with 4 additions and 1 deletions
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5
fs/btrfs/ctree.c
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@ -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);