65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/*
|
|
* Copyright (C) 2007 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License v2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#include "ctree.h"
|
|
#include "disk-io.h"
|
|
#include "transaction.h"
|
|
|
|
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 objectid)
|
|
{
|
|
struct btrfs_key key;
|
|
int ret;
|
|
key.objectid = objectid;
|
|
btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
|
|
key.offset = 0;
|
|
|
|
ret = btrfs_insert_empty_item(trans, root, path, &key,
|
|
sizeof(struct btrfs_inode_item));
|
|
if (ret == 0 && objectid > root->highest_inode)
|
|
root->highest_inode = objectid;
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_path *path,
|
|
struct btrfs_key *location, int mod)
|
|
{
|
|
int ins_len = mod < 0 ? -1 : 0;
|
|
int cow = mod != 0;
|
|
int ret;
|
|
int slot;
|
|
struct extent_buffer *leaf;
|
|
struct btrfs_key found_key;
|
|
|
|
ret = btrfs_search_slot(trans, root, location, path, ins_len, cow);
|
|
if (ret > 0 && btrfs_key_type(location) == BTRFS_ROOT_ITEM_KEY &&
|
|
location->offset == (u64)-1 && path->slots[0] != 0) {
|
|
slot = path->slots[0] - 1;
|
|
leaf = path->nodes[0];
|
|
btrfs_item_key_to_cpu(leaf, &found_key, slot);
|
|
if (found_key.objectid == location->objectid &&
|
|
btrfs_key_type(&found_key) == btrfs_key_type(location)) {
|
|
path->slots[0]--;
|
|
return 0;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|