1 #include <linux/module.h>
4 #include "print-tree.h"
6 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid,
7 struct btrfs_root_item *item, struct btrfs_key *key)
9 struct btrfs_path path;
10 struct btrfs_key search_key;
15 search_key.objectid = objectid;
16 search_key.flags = (u32)-1;
17 search_key.offset = (u32)-1;
19 btrfs_init_path(&path);
20 ret = btrfs_search_slot(NULL, root, &search_key, &path, 0, 0);
24 l = &path.nodes[0]->leaf;
25 BUG_ON(path.slots[0] == 0);
26 slot = path.slots[0] - 1;
27 if (btrfs_disk_key_objectid(&l->items[slot].key) != objectid) {
31 memcpy(item, btrfs_item_ptr(l, slot, struct btrfs_root_item),
33 btrfs_disk_key_to_cpu(key, &l->items[slot].key);
34 btrfs_release_path(root, &path);
40 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
41 *root, struct btrfs_key *key, struct btrfs_root_item
44 struct btrfs_path path;
49 btrfs_init_path(&path);
50 ret = btrfs_search_slot(trans, root, key, &path, 0, 1);
54 l = &path.nodes[0]->leaf;
56 memcpy(btrfs_item_ptr(l, slot, struct btrfs_root_item), item,
59 btrfs_release_path(root, &path);
63 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
64 *root, struct btrfs_key *key, struct btrfs_root_item
68 ret = btrfs_insert_item(trans, root, key, item, sizeof(*item));
73 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
74 struct btrfs_key *key)
76 struct btrfs_path path;
79 btrfs_init_path(&path);
80 ret = btrfs_search_slot(trans, root, key, &path, -1, 1);
84 ret = btrfs_del_item(trans, root, &path);
86 btrfs_release_path(root, &path);