Chris Mason | 3768f36 | 2007-03-13 16:47:54 -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 "print-tree.h" |
| 8 | |
| 9 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, |
| 10 | struct btrfs_root_item *item, struct btrfs_key *key) |
| 11 | { |
| 12 | struct btrfs_path path; |
| 13 | struct btrfs_key search_key; |
| 14 | struct btrfs_leaf *l; |
| 15 | int ret; |
| 16 | int slot; |
| 17 | |
| 18 | search_key.objectid = objectid; |
| 19 | search_key.flags = (u32)-1; |
| 20 | search_key.offset = (u32)-1; |
| 21 | |
| 22 | btrfs_init_path(&path); |
| 23 | ret = btrfs_search_slot(root, &search_key, &path, 0, 0); |
| 24 | if (ret < 0) |
| 25 | goto out; |
| 26 | BUG_ON(ret == 0); |
| 27 | l = &path.nodes[0]->leaf; |
| 28 | BUG_ON(path.slots[0] == 0); |
| 29 | slot = path.slots[0] - 1; |
Chris Mason | 62e2749 | 2007-03-15 12:56:47 -0400 | [diff] [blame^] | 30 | if (btrfs_disk_key_objectid(&l->items[slot].key) != objectid) { |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 31 | ret = 1; |
| 32 | goto out; |
| 33 | } |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 34 | memcpy(item, btrfs_item_ptr(l, slot, struct btrfs_root_item), |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 35 | sizeof(*item)); |
| 36 | btrfs_disk_key_to_cpu(key, &l->items[slot].key); |
| 37 | btrfs_release_path(root, &path); |
| 38 | ret = 0; |
| 39 | out: |
| 40 | return ret; |
| 41 | } |
| 42 | |
| 43 | int btrfs_update_root(struct btrfs_root *root, struct btrfs_key *key, |
| 44 | struct btrfs_root_item *item) |
| 45 | { |
| 46 | struct btrfs_path path; |
| 47 | struct btrfs_leaf *l; |
| 48 | int ret; |
| 49 | int slot; |
| 50 | |
| 51 | btrfs_init_path(&path); |
| 52 | ret = btrfs_search_slot(root, key, &path, 0, 1); |
| 53 | if (ret < 0) |
| 54 | goto out; |
| 55 | BUG_ON(ret != 0); |
| 56 | l = &path.nodes[0]->leaf; |
| 57 | slot = path.slots[0]; |
Chris Mason | 123abc8 | 2007-03-14 14:14:43 -0400 | [diff] [blame] | 58 | memcpy(btrfs_item_ptr(l, slot, struct btrfs_root_item), item, |
Chris Mason | 3768f36 | 2007-03-13 16:47:54 -0400 | [diff] [blame] | 59 | sizeof(*item)); |
| 60 | out: |
| 61 | btrfs_release_path(root, &path); |
| 62 | return ret; |
| 63 | } |
| 64 | |
| 65 | int btrfs_insert_root(struct btrfs_root *root, struct btrfs_key *key, |
| 66 | struct btrfs_root_item *item) |
| 67 | { |
| 68 | int ret; |
| 69 | ret = btrfs_insert_item(root, key, item, sizeof(*item)); |
| 70 | BUG_ON(ret); |
| 71 | return ret; |
| 72 | } |
| 73 | |
| 74 | int btrfs_del_root(struct btrfs_root *root, struct btrfs_key *key) |
| 75 | { |
| 76 | struct btrfs_path path; |
| 77 | int ret; |
| 78 | |
| 79 | btrfs_init_path(&path); |
| 80 | ret = btrfs_search_slot(root, key, &path, -1, 1); |
| 81 | if (ret < 0) |
| 82 | goto out; |
| 83 | BUG_ON(ret != 0); |
| 84 | ret = btrfs_del_item(root, &path); |
| 85 | out: |
| 86 | btrfs_release_path(root, &path); |
| 87 | return ret; |
| 88 | } |