Btrfs: directory testing code and dir item fixes
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 2a888e9..8043b2e 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -18,6 +18,7 @@
key.objectid = dir;
key.flags = 0;
+ btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
ret = btrfs_name_hash(name, name_len, &key.offset);
BUG_ON(ret);
btrfs_init_path(&path);
@@ -38,65 +39,40 @@
return ret;
}
-int btrfs_del_dir_item(struct btrfs_root *root, u64 dir, char *name,
- int name_len)
+int btrfs_lookup_dir_item(struct btrfs_root *root, struct btrfs_path *path,
+ u64 dir, char *name, int name_len, int mod)
{
- int ret = 0;
- struct btrfs_path path;
+ int ret;
struct btrfs_key key;
+ int ins_len = mod < 0 ? -1 : 0;
+ int cow = mod != 0;
key.objectid = dir;
key.flags = 0;
+ btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
ret = btrfs_name_hash(name, name_len, &key.offset);
BUG_ON(ret);
- btrfs_init_path(&path);
- ret = btrfs_search_slot(root, &key, &path, 0, 1);
- if (ret)
- goto out;
- ret = btrfs_del_item(root, &path);
-out:
- btrfs_release_path(root, &path);
+ ret = btrfs_search_slot(root, &key, path, ins_len, cow);
return ret;
}
-int btrfs_lookup_dir_item(struct btrfs_root *root, u64 dir, char *name,
- int name_len, u64 *objectid)
+int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
+ char *name, int name_len)
{
- int ret = 0;
- struct btrfs_path path;
+ struct btrfs_item *item;
struct btrfs_dir_item *dir_item;
char *name_ptr;
- struct btrfs_key key;
u32 item_len;
- struct btrfs_item *item;
-
- key.objectid = dir;
- key.flags = 0;
- ret = btrfs_name_hash(name, name_len, &key.offset);
- BUG_ON(ret);
- btrfs_init_path(&path);
- ret = btrfs_search_slot(root, &key, &path, 0, 0);
- if (ret)
- goto out;
-
- dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0],
- struct btrfs_dir_item);
-
- item = path.nodes[0]->leaf.items + path.slots[0];
+ item = path->nodes[0]->leaf.items + path->slots[0];
item_len = btrfs_item_size(item);
if (item_len != name_len + sizeof(struct btrfs_dir_item)) {
- BUG();
- ret = 1;
- goto out;
+ return 0;
}
+ dir_item = btrfs_item_ptr(&path->nodes[0]->leaf, path->slots[0],
+ struct btrfs_dir_item);
name_ptr = (char *)(dir_item + 1);
if (memcmp(name_ptr, name, name_len)) {
- BUG();
- ret = 1;
- goto out;
+ return 0;
}
- *objectid = btrfs_dir_objectid(dir_item);
-out:
- btrfs_release_path(root, &path);
- return ret;
+ return 1;
}