mirror of
https://github.com/torvalds/linux.git
synced 2024-11-05 03:21:32 +00:00
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "kerncompat.h"
|
|
#include "radix-tree.h"
|
|
#include "ctree.h"
|
|
#include "disk-io.h"
|
|
#include "hash.h"
|
|
#include "transaction.h"
|
|
|
|
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, char *name, int name_len, u64 dir, u64
|
|
objectid, u8 type)
|
|
{
|
|
int ret = 0;
|
|
struct btrfs_path path;
|
|
struct btrfs_dir_item *dir_item;
|
|
char *name_ptr;
|
|
struct btrfs_key key;
|
|
u32 data_size;
|
|
|
|
key.objectid = dir;
|
|
key.flags = 0;
|
|
btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
|
|
ret = btrfs_name_hash(name, name_len, &key.offset);
|
|
BUG_ON(ret);
|
|
btrfs_init_path(&path);
|
|
data_size = sizeof(*dir_item) + name_len;
|
|
ret = btrfs_insert_empty_item(trans, root, &path, &key, data_size);
|
|
if (ret)
|
|
goto out;
|
|
|
|
dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0],
|
|
struct btrfs_dir_item);
|
|
btrfs_set_dir_objectid(dir_item, objectid);
|
|
btrfs_set_dir_type(dir_item, type);
|
|
btrfs_set_dir_flags(dir_item, 0);
|
|
btrfs_set_dir_name_len(dir_item, name_len);
|
|
name_ptr = (char *)(dir_item + 1);
|
|
memcpy(name_ptr, name, name_len);
|
|
out:
|
|
btrfs_release_path(root, &path);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_path *path, u64 dir, char *name,
|
|
int name_len, int mod)
|
|
{
|
|
int ret;
|
|
struct btrfs_key key;
|
|
int ins_len = mod < 0 ? -1 : 0;
|
|
int cow = mod != 0;
|
|
|
|
key.objectid = dir;
|
|
key.flags = 0;
|
|
btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
|
|
ret = btrfs_name_hash(name, name_len, &key.offset);
|
|
BUG_ON(ret);
|
|
ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
|
|
return ret;
|
|
}
|
|
|
|
int btrfs_match_dir_item_name(struct btrfs_root *root,
|
|
struct btrfs_path *path, char
|
|
*name, int name_len)
|
|
{
|
|
struct btrfs_dir_item *dir_item;
|
|
char *name_ptr;
|
|
|
|
dir_item = btrfs_item_ptr(&path->nodes[0]->leaf, path->slots[0],
|
|
struct btrfs_dir_item);
|
|
if (btrfs_dir_name_len(dir_item) != name_len)
|
|
return 0;
|
|
name_ptr = (char *)(dir_item + 1);
|
|
if (memcmp(name_ptr, name, name_len))
|
|
return 0;
|
|
return 1;
|
|
}
|