-#include <stdio.h>
-#include <stdlib.h>
-#include "kerncompat.h"
-#include "radix-tree.h"
+#include <linux/module.h>
#include "ctree.h"
#include "disk-io.h"
#include "hash.h"
+#include "transaction.h"
-int btrfs_insert_dir_item(struct btrfs_root *root, char *name, int name_len,
- u64 dir, u64 objectid, u8 type)
+int insert_with_overflow(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, struct btrfs_path *path, struct btrfs_key
+ *cpu_key, u32 data_size)
+{
+ int overflow;
+ int ret;
+
+ ret = btrfs_insert_empty_item(trans, root, path, cpu_key, data_size);
+ overflow = btrfs_key_overflow(cpu_key);
+
+ while(ret == -EEXIST && overflow < BTRFS_KEY_OVERFLOW_MAX) {
+ overflow++;
+ btrfs_set_key_overflow(cpu_key, overflow);
+ btrfs_release_path(root, path);
+ ret = btrfs_insert_empty_item(trans, root, path, cpu_key,
+ data_size);
+ }
+ return ret;
+}
+
+int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, const char *name, int name_len, u64 dir,
+ struct btrfs_key *location, u8 type)
{
int ret = 0;
- struct btrfs_path path;
+ struct btrfs_path *path;
struct btrfs_dir_item *dir_item;
char *name_ptr;
struct btrfs_key key;
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);
+ path = btrfs_alloc_path();
+ btrfs_init_path(path);
data_size = sizeof(*dir_item) + name_len;
- ret = btrfs_insert_empty_item(root, &path, &key, data_size);
+ ret = insert_with_overflow(trans, root, path, &key, data_size);
+ if (ret)
+ goto out;
+
+ dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
+ path->slots[0],
+ struct btrfs_dir_item);
+ btrfs_cpu_key_to_disk(&dir_item->location, location);
+ 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);
+
+ btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
+
+ /* FIXME, use some real flag for selecting the extra index */
+ if (root == root->fs_info->tree_root)
+ goto out;
+
+ btrfs_release_path(root, path);
+
+ btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY);
+ key.offset = location->objectid;
+ ret = insert_with_overflow(trans, root, path, &key, data_size);
+ // FIXME clear the dirindex bit
if (ret)
goto out;
- dir_item = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0],
+ dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
+ path->slots[0],
struct btrfs_dir_item);
- btrfs_set_dir_objectid(dir_item, objectid);
+ btrfs_cpu_key_to_disk(&dir_item->location, location);
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);
+ btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len);
+ btrfs_mark_buffer_dirty(path->nodes[0]);
out:
- btrfs_release_path(root, &path);
+ btrfs_release_path(root, path);
+ btrfs_free_path(path);
return ret;
}
-int btrfs_lookup_dir_item(struct btrfs_root *root, struct btrfs_path *path,
- u64 dir, char *name, int name_len, int mod)
+int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
+ *root, struct btrfs_path *path, u64 dir,
+ const char *name, int name_len, int mod)
{
int ret;
struct btrfs_key key;
int ins_len = mod < 0 ? -1 : 0;
int cow = mod != 0;
+ struct btrfs_disk_key *found_key;
+ struct btrfs_leaf *leaf;
+ u32 overflow;
key.objectid = dir;
key.flags = 0;
btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
+ btrfs_set_key_overflow(&key, BTRFS_KEY_OVERFLOW_MAX - 1);
ret = btrfs_name_hash(name, name_len, &key.offset);
BUG_ON(ret);
- ret = btrfs_search_slot(root, &key, path, ins_len, cow);
- return ret;
+ while(1) {
+ ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
+ if (ret < 0)
+ return ret;
+ if (ret > 0) {
+ if (path->slots[0] == 0)
+ return 1;
+ path->slots[0]--;
+ }
+ leaf = btrfs_buffer_leaf(path->nodes[0]);
+ found_key = &leaf->items[path->slots[0]].key;
+
+ if (btrfs_disk_key_objectid(found_key) != dir ||
+ btrfs_disk_key_type(found_key) != BTRFS_DIR_ITEM_KEY ||
+ btrfs_disk_key_offset(found_key) != key.offset)
+ return 1;
+
+ if (btrfs_match_dir_item_name(root, path, name, name_len))
+ return 0;
+
+ overflow = btrfs_disk_key_overflow(found_key);
+ if (overflow == 0)
+ return 1;
+ btrfs_set_key_overflow(&key, overflow - 1);
+ btrfs_release_path(root, path);
+ }
+ return 1;
+}
+
+int btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_path *path, u64 dir,
+ u64 objectid, int mod)
+{
+ int ret;
+ struct btrfs_key key;
+ int ins_len = mod < 0 ? -1 : 0;
+ int cow = mod != 0;
+ struct btrfs_disk_key *found_key;
+ struct btrfs_leaf *leaf;
+
+ key.objectid = dir;
+ key.flags = 0;
+ btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY);
+ btrfs_set_key_overflow(&key, BTRFS_KEY_OVERFLOW_MAX - 1);
+ key.offset = objectid;
+ ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
+ if (ret < 0)
+ return ret;
+ if (ret > 0) {
+ if (path->slots[0] == 0)
+ return 1;
+ path->slots[0]--;
+ }
+ leaf = btrfs_buffer_leaf(path->nodes[0]);
+ found_key = &leaf->items[path->slots[0]].key;
+
+ if (btrfs_disk_key_objectid(found_key) != dir ||
+ btrfs_disk_key_type(found_key) != BTRFS_DIR_INDEX_KEY)
+ return 1;
+ if (btrfs_disk_key_offset(found_key) == objectid)
+ return 0;
+ return 1;
}
-int btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
- char *name, int name_len)
+int btrfs_match_dir_item_name(struct btrfs_root *root,
+ struct btrfs_path *path,
+ const 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],
+ dir_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
+ path->slots[0],
struct btrfs_dir_item);
if (btrfs_dir_name_len(dir_item) != name_len)
return 0;
projects / linux-2.6-block.git / blobdiff