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Commit | Line | Data |
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62e2749e CM |
1 | #include <stdio.h> |
2 | #include <stdlib.h> | |
3 | #include "kerncompat.h" | |
4 | #include "radix-tree.h" | |
5 | #include "ctree.h" | |
6 | #include "disk-io.h" | |
7 | #include "hash.h" | |
8 | ||
9 | int btrfs_insert_dir_item(struct btrfs_root *root, char *name, int name_len, | |
10 | u64 dir, u64 objectid, u8 type) | |
11 | { | |
12 | int ret = 0; | |
13 | struct btrfs_path path; | |
14 | struct btrfs_dir_item *dir_item; | |
15 | char *name_ptr; | |
16 | struct btrfs_key key; | |
17 | u32 data_size; | |
18 | ||
19 | key.objectid = dir; | |
20 | key.flags = 0; | |
21 | ret = btrfs_name_hash(name, name_len, &key.offset); | |
22 | BUG_ON(ret); | |
23 | btrfs_init_path(&path); | |
24 | data_size = sizeof(*dir_item) + name_len; | |
25 | ret = btrfs_insert_empty_item(root, &path, &key, data_size); | |
26 | if (ret) | |
27 | goto out; | |
28 | ||
29 | dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0], | |
30 | struct btrfs_dir_item); | |
31 | btrfs_set_dir_objectid(dir_item, objectid); | |
32 | btrfs_set_dir_type(dir_item, type); | |
33 | btrfs_set_dir_flags(dir_item, 0); | |
34 | name_ptr = (char *)(dir_item + 1); | |
35 | memcpy(name_ptr, name, name_len); | |
36 | out: | |
37 | btrfs_release_path(root, &path); | |
38 | return ret; | |
39 | } | |
40 | ||
41 | int btrfs_del_dir_item(struct btrfs_root *root, u64 dir, char *name, | |
42 | int name_len) | |
43 | { | |
44 | int ret = 0; | |
45 | struct btrfs_path path; | |
46 | struct btrfs_key key; | |
47 | ||
48 | key.objectid = dir; | |
49 | key.flags = 0; | |
50 | ret = btrfs_name_hash(name, name_len, &key.offset); | |
51 | BUG_ON(ret); | |
52 | btrfs_init_path(&path); | |
53 | ret = btrfs_search_slot(root, &key, &path, 0, 1); | |
54 | if (ret) | |
55 | goto out; | |
56 | ret = btrfs_del_item(root, &path); | |
57 | out: | |
58 | btrfs_release_path(root, &path); | |
59 | return ret; | |
60 | } | |
61 | ||
62 | int btrfs_lookup_dir_item(struct btrfs_root *root, u64 dir, char *name, | |
63 | int name_len, u64 *objectid) | |
64 | { | |
65 | int ret = 0; | |
66 | struct btrfs_path path; | |
67 | struct btrfs_dir_item *dir_item; | |
68 | char *name_ptr; | |
69 | struct btrfs_key key; | |
70 | u32 item_len; | |
71 | struct btrfs_item *item; | |
72 | ||
73 | key.objectid = dir; | |
74 | key.flags = 0; | |
75 | ret = btrfs_name_hash(name, name_len, &key.offset); | |
76 | BUG_ON(ret); | |
77 | btrfs_init_path(&path); | |
78 | ret = btrfs_search_slot(root, &key, &path, 0, 0); | |
79 | if (ret) | |
80 | goto out; | |
81 | ||
82 | dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0], | |
83 | struct btrfs_dir_item); | |
84 | ||
85 | item = path.nodes[0]->leaf.items + path.slots[0]; | |
86 | item_len = btrfs_item_size(item); | |
87 | if (item_len != name_len + sizeof(struct btrfs_dir_item)) { | |
88 | BUG(); | |
89 | ret = 1; | |
90 | goto out; | |
91 | } | |
92 | name_ptr = (char *)(dir_item + 1); | |
93 | if (memcmp(name_ptr, name, name_len)) { | |
94 | BUG(); | |
95 | ret = 1; | |
96 | goto out; | |
97 | } | |
98 | *objectid = btrfs_dir_objectid(dir_item); | |
99 | out: | |
100 | btrfs_release_path(root, &path); | |
101 | return ret; | |
102 | } |