Chris Mason | 6cbd557 | 2007-06-12 09:07:21 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
Chris Mason | 2e635a2 | 2007-03-21 11:12:56 -0400 | [diff] [blame] | 19 | #include <linux/module.h> |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 20 | #include "ctree.h" |
| 21 | #include "disk-io.h" |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 22 | #include "transaction.h" |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 23 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 24 | int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 25 | *root, u64 objectid, struct btrfs_inode_item |
| 26 | *inode_item) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 27 | { |
Chris Mason | 5caf2a0 | 2007-04-02 11:20:42 -0400 | [diff] [blame] | 28 | struct btrfs_path *path; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 29 | struct btrfs_key key; |
| 30 | int ret; |
| 31 | key.objectid = objectid; |
| 32 | key.flags = 0; |
| 33 | btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); |
| 34 | key.offset = 0; |
| 35 | |
Chris Mason | 5caf2a0 | 2007-04-02 11:20:42 -0400 | [diff] [blame] | 36 | path = btrfs_alloc_path(); |
| 37 | BUG_ON(!path); |
| 38 | btrfs_init_path(path); |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 39 | ret = btrfs_insert_item(trans, root, &key, inode_item, |
| 40 | sizeof(*inode_item)); |
Chris Mason | 5caf2a0 | 2007-04-02 11:20:42 -0400 | [diff] [blame] | 41 | btrfs_release_path(root, path); |
| 42 | btrfs_free_path(path); |
Chris Mason | 1b05da2 | 2007-04-10 12:13:09 -0400 | [diff] [blame] | 43 | if (ret == 0 && objectid > root->highest_inode) |
| 44 | root->highest_inode = objectid; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 45 | return ret; |
| 46 | } |
| 47 | |
Chris Mason | e089f05 | 2007-03-16 16:20:31 -0400 | [diff] [blame] | 48 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 49 | *root, struct btrfs_path *path, |
| 50 | struct btrfs_key *location, int mod) |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 51 | { |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 52 | int ins_len = mod < 0 ? -1 : 0; |
| 53 | int cow = mod != 0; |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 54 | int ret; |
| 55 | int slot; |
| 56 | struct btrfs_leaf *leaf; |
| 57 | struct btrfs_key found_key; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 58 | |
Chris Mason | d6e4a42 | 2007-04-06 15:37:36 -0400 | [diff] [blame] | 59 | ret = btrfs_search_slot(trans, root, location, path, ins_len, cow); |
| 60 | if (ret > 0 && btrfs_key_type(location) == BTRFS_ROOT_ITEM_KEY && |
| 61 | location->offset == (u64)-1 && path->slots[0] != 0) { |
| 62 | slot = path->slots[0] - 1; |
| 63 | leaf = btrfs_buffer_leaf(path->nodes[0]); |
| 64 | btrfs_disk_key_to_cpu(&found_key, &leaf->items[slot].key); |
| 65 | if (found_key.objectid == location->objectid && |
| 66 | btrfs_key_type(&found_key) == btrfs_key_type(location)) { |
| 67 | path->slots[0]--; |
| 68 | return 0; |
| 69 | } |
| 70 | } |
| 71 | return ret; |
Chris Mason | 1e1d270 | 2007-03-15 19:03:33 -0400 | [diff] [blame] | 72 | } |