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btrfs: send: remove BUG_ON from name_cache_delete

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If cleaning the name cache fails, we could try to proceed at the cost of
some memory leak. This is not expected to happen often.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
David Sterba 2014-02-03 19:24:40 +01:00 committed by Josef Bacik
parent 4d1a63b21b
commit 57fb8910c2
1 changed files with 9 additions and 2 deletions
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11
fs/btrfs/send.c
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@ -1890,13 +1890,20 @@ static void name_cache_delete(struct send_ctx *sctx,
nce_head = radix_tree_lookup(&sctx->name_cache,
(unsigned long)nce->ino);
BUG_ON(!nce_head);
if (!nce_head) {
btrfs_err(sctx->send_root->fs_info,
"name_cache_delete lookup failed ino %llu cache size %d, leaking memory",
nce->ino, sctx->name_cache_size);
}
list_del(&nce->radix_list);
list_del(&nce->list);
sctx->name_cache_size--;
if (list_empty(nce_head)) {
/*
* We may not get to the final release of nce_head if the lookup fails
*/
if (nce_head && list_empty(nce_head)) {
radix_tree_delete(&sctx->name_cache, (unsigned long)nce->ino);
kfree(nce_head);
}