Commit | Line | Data |
---|---|---|
2e635a27 | 1 | #include <linux/module.h> |
62e2749e CM |
2 | #include "ctree.h" |
3 | #include "disk-io.h" | |
4 | #include "hash.h" | |
e089f05c | 5 | #include "transaction.h" |
62e2749e | 6 | |
e089f05c CM |
7 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
8 | *root, char *name, int name_len, u64 dir, u64 | |
9 | objectid, u8 type) | |
62e2749e CM |
10 | { |
11 | int ret = 0; | |
12 | struct btrfs_path path; | |
13 | struct btrfs_dir_item *dir_item; | |
14 | char *name_ptr; | |
15 | struct btrfs_key key; | |
16 | u32 data_size; | |
17 | ||
18 | key.objectid = dir; | |
19 | key.flags = 0; | |
1d4f6404 | 20 | btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); |
2e635a27 CM |
21 | if (name_len == 1 && *name == '.') |
22 | key.offset = 1; | |
23 | else if (name_len == 2 && name[0] == '.' && name[1] == '.') | |
24 | key.offset = 2; | |
25 | else | |
26 | ret = btrfs_name_hash(name, name_len, &key.offset); | |
62e2749e CM |
27 | BUG_ON(ret); |
28 | btrfs_init_path(&path); | |
29 | data_size = sizeof(*dir_item) + name_len; | |
e089f05c | 30 | ret = btrfs_insert_empty_item(trans, root, &path, &key, data_size); |
62e2749e CM |
31 | if (ret) |
32 | goto out; | |
33 | ||
34 | dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0], | |
35 | struct btrfs_dir_item); | |
36 | btrfs_set_dir_objectid(dir_item, objectid); | |
37 | btrfs_set_dir_type(dir_item, type); | |
38 | btrfs_set_dir_flags(dir_item, 0); | |
a8a2ee0c | 39 | btrfs_set_dir_name_len(dir_item, name_len); |
62e2749e CM |
40 | name_ptr = (char *)(dir_item + 1); |
41 | memcpy(name_ptr, name, name_len); | |
42 | out: | |
43 | btrfs_release_path(root, &path); | |
44 | return ret; | |
45 | } | |
46 | ||
e089f05c CM |
47 | int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
48 | *root, struct btrfs_path *path, u64 dir, char *name, | |
49 | int name_len, int mod) | |
62e2749e | 50 | { |
1d4f6404 | 51 | int ret; |
62e2749e | 52 | struct btrfs_key key; |
1d4f6404 CM |
53 | int ins_len = mod < 0 ? -1 : 0; |
54 | int cow = mod != 0; | |
62e2749e CM |
55 | |
56 | key.objectid = dir; | |
57 | key.flags = 0; | |
1d4f6404 | 58 | btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); |
62e2749e CM |
59 | ret = btrfs_name_hash(name, name_len, &key.offset); |
60 | BUG_ON(ret); | |
e089f05c | 61 | ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); |
62e2749e CM |
62 | return ret; |
63 | } | |
64 | ||
e089f05c CM |
65 | int btrfs_match_dir_item_name(struct btrfs_root *root, |
66 | struct btrfs_path *path, char | |
67 | *name, int name_len) | |
62e2749e | 68 | { |
62e2749e CM |
69 | struct btrfs_dir_item *dir_item; |
70 | char *name_ptr; | |
a8a2ee0c | 71 | |
1d4f6404 CM |
72 | dir_item = btrfs_item_ptr(&path->nodes[0]->leaf, path->slots[0], |
73 | struct btrfs_dir_item); | |
a8a2ee0c CM |
74 | if (btrfs_dir_name_len(dir_item) != name_len) |
75 | return 0; | |
62e2749e | 76 | name_ptr = (char *)(dir_item + 1); |
a8a2ee0c | 77 | if (memcmp(name_ptr, name, name_len)) |
1d4f6404 | 78 | return 0; |
1d4f6404 | 79 | return 1; |
62e2749e | 80 | } |