| Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame^] | 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 | } |