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 | 7 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
d5719762 | 8 | *root, const char *name, int name_len, u64 dir, u64 |
e089f05c | 9 | objectid, u8 type) |
62e2749e CM |
10 | { |
11 | int ret = 0; | |
5caf2a00 | 12 | struct btrfs_path *path; |
62e2749e CM |
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); |
e20d96d6 | 21 | ret = btrfs_name_hash(name, name_len, &key.offset); |
62e2749e | 22 | BUG_ON(ret); |
5caf2a00 CM |
23 | path = btrfs_alloc_path(); |
24 | btrfs_init_path(path); | |
62e2749e | 25 | data_size = sizeof(*dir_item) + name_len; |
5caf2a00 | 26 | ret = btrfs_insert_empty_item(trans, root, path, &key, data_size); |
62e2749e CM |
27 | if (ret) |
28 | goto out; | |
29 | ||
5caf2a00 CM |
30 | dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), |
31 | path->slots[0], | |
62e2749e CM |
32 | struct btrfs_dir_item); |
33 | btrfs_set_dir_objectid(dir_item, objectid); | |
34 | btrfs_set_dir_type(dir_item, type); | |
35 | btrfs_set_dir_flags(dir_item, 0); | |
a8a2ee0c | 36 | btrfs_set_dir_name_len(dir_item, name_len); |
62e2749e | 37 | name_ptr = (char *)(dir_item + 1); |
5caf2a00 CM |
38 | btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len); |
39 | btrfs_mark_buffer_dirty(path->nodes[0]); | |
bae45de0 CM |
40 | btrfs_release_path(root, path); |
41 | ||
42 | btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY); | |
43 | key.offset = objectid; | |
44 | ret = btrfs_insert_empty_item(trans, root, path, &key, data_size); | |
45 | // FIXME clear the dirindex bit | |
46 | if (ret) | |
47 | goto out; | |
48 | ||
49 | dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), | |
50 | path->slots[0], | |
51 | struct btrfs_dir_item); | |
52 | btrfs_set_dir_objectid(dir_item, objectid); | |
53 | btrfs_set_dir_type(dir_item, type); | |
54 | btrfs_set_dir_flags(dir_item, 0); | |
55 | btrfs_set_dir_name_len(dir_item, name_len); | |
56 | name_ptr = (char *)(dir_item + 1); | |
57 | btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len); | |
58 | btrfs_mark_buffer_dirty(path->nodes[0]); | |
62e2749e | 59 | out: |
5caf2a00 CM |
60 | btrfs_release_path(root, path); |
61 | btrfs_free_path(path); | |
62e2749e CM |
62 | return ret; |
63 | } | |
64 | ||
e089f05c | 65 | int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
e20d96d6 CM |
66 | *root, struct btrfs_path *path, u64 dir, |
67 | const char *name, int name_len, int mod) | |
62e2749e | 68 | { |
1d4f6404 | 69 | int ret; |
62e2749e | 70 | struct btrfs_key key; |
1d4f6404 CM |
71 | int ins_len = mod < 0 ? -1 : 0; |
72 | int cow = mod != 0; | |
62e2749e CM |
73 | |
74 | key.objectid = dir; | |
75 | key.flags = 0; | |
1d4f6404 | 76 | btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); |
62e2749e CM |
77 | ret = btrfs_name_hash(name, name_len, &key.offset); |
78 | BUG_ON(ret); | |
e089f05c | 79 | ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); |
62e2749e CM |
80 | return ret; |
81 | } | |
82 | ||
5f26f772 CM |
83 | int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
84 | struct btrfs_root *root, | |
85 | struct btrfs_path *path, u64 dir, | |
86 | u64 objectid, int mod) | |
87 | { | |
88 | int ret; | |
89 | struct btrfs_key key; | |
90 | int ins_len = mod < 0 ? -1 : 0; | |
91 | int cow = mod != 0; | |
92 | ||
93 | key.objectid = dir; | |
94 | key.flags = 0; | |
95 | btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY); | |
96 | key.offset = objectid; | |
97 | ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); | |
98 | return ret; | |
99 | } | |
100 | ||
e089f05c | 101 | int btrfs_match_dir_item_name(struct btrfs_root *root, |
7f5c1516 CM |
102 | struct btrfs_path *path, |
103 | const char *name, int name_len) | |
62e2749e | 104 | { |
62e2749e CM |
105 | struct btrfs_dir_item *dir_item; |
106 | char *name_ptr; | |
a8a2ee0c | 107 | |
e20d96d6 CM |
108 | dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), |
109 | path->slots[0], | |
1d4f6404 | 110 | struct btrfs_dir_item); |
a8a2ee0c CM |
111 | if (btrfs_dir_name_len(dir_item) != name_len) |
112 | return 0; | |
62e2749e | 113 | name_ptr = (char *)(dir_item + 1); |
a8a2ee0c | 114 | if (memcmp(name_ptr, name, name_len)) |
1d4f6404 | 115 | return 0; |
1d4f6404 | 116 | return 1; |
62e2749e | 117 | } |