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#include <stdio.h>
#include <stdlib.h>
#include "kerncompat.h"
#include "radix-tree.h"
#include "ctree.h"
#include "disk-io.h"
#include "hash.h"
int btrfs_insert_dir_item(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;
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(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);
name_ptr = (char *)(dir_item + 1);
memcpy(name_ptr, name, name_len);
out:
btrfs_release_path(root, &path);
return ret;
}
int btrfs_del_dir_item(struct btrfs_root *root, u64 dir, char *name,
int name_len)
{
int ret = 0;
struct btrfs_path path;
struct btrfs_key key;
key.objectid = dir;
key.flags = 0;
ret = btrfs_name_hash(name, name_len, &key.offset);
BUG_ON(ret);
btrfs_init_path(&path);
ret = btrfs_search_slot(root, &key, &path, 0, 1);
if (ret)
goto out;
ret = btrfs_del_item(root, &path);
out:
btrfs_release_path(root, &path);
return ret;
}
int btrfs_lookup_dir_item(struct btrfs_root *root, u64 dir, char *name,
int name_len, u64 *objectid)
{
int ret = 0;
struct btrfs_path path;
struct btrfs_dir_item *dir_item;
char *name_ptr;
struct btrfs_key key;
u32 item_len;
struct btrfs_item *item;
key.objectid = dir;
key.flags = 0;
ret = btrfs_name_hash(name, name_len, &key.offset);
BUG_ON(ret);
btrfs_init_path(&path);
ret = btrfs_search_slot(root, &key, &path, 0, 0);
if (ret)
goto out;
dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0],
struct btrfs_dir_item);
item = path.nodes[0]->leaf.items + path.slots[0];
item_len = btrfs_item_size(item);
if (item_len != name_len + sizeof(struct btrfs_dir_item)) {
BUG();
ret = 1;
goto out;
}
name_ptr = (char *)(dir_item + 1);
if (memcmp(name_ptr, name, name_len)) {
BUG();
ret = 1;
goto out;
}
*objectid = btrfs_dir_objectid(dir_item);
out:
btrfs_release_path(root, &path);
return ret;
}
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