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btrfs: handle extent reference errors in do_relocation 

We can already deal with errors appropriately from do_relocation, simply
handle any errors that come from changing the refs at this point
cleanly.  We have to abort the transaction if we fail here as we've
modified metadata at this point.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2021-03-12 15:25:25 -05:00 committed by David Sterba
parent 253e258c34
commit eb6b7fb4b5
1 changed files with 5 additions and 4 deletions
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9
fs/btrfs/relocation.c
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@ -2437,10 +2437,11 @@ static int do_relocation(struct btrfs_trans_handle *trans,
btrfs_init_tree_ref(&ref, node->level,
btrfs_header_owner(upper->eb));
ret = btrfs_inc_extent_ref(trans, &ref);
BUG_ON(ret);
ret = btrfs_drop_subtree(trans, root, eb, upper->eb);
BUG_ON(ret);
if (!ret)
ret = btrfs_drop_subtree(trans, root, eb,
upper->eb);
if (ret)
btrfs_abort_transaction(trans, ret);
}
next:
if (!upper->pending)