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Btrfs: more inode indexed directory work 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
hifive-unleashed-5.1
Chris Mason 2007-04-05 10:38:44 -04:00 committed by David Woodhouse
parent bae45de03c
commit 5f26f772e5
4 changed files with 70 additions and 45 deletions
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4
fs/btrfs/ctree.h
View File

@ -921,6 +921,10 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
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 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 btrfs_match_dir_item_name(struct btrfs_root *root, struct btrfs_path *path,
const char *name, int name_len);
/* inode-map.c */

18
fs/btrfs/dir-item.c
View File

@ -80,6 +80,24 @@ int btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
return ret;
}
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;
key.objectid = dir;
key.flags = 0;
btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY);
key.offset = objectid;
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,
const char *name, int name_len)

3
fs/btrfs/extent-tree.c
View File

@ -224,6 +224,7 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
path = btrfs_alloc_path();
BUG_ON(!path);
btrfs_init_path(path);
ret = btrfs_search_slot(trans, extent_root, &key, path, -1, 1);
if (ret) {
printk("failed to find %Lu\n", key.objectid);
@ -363,8 +364,6 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
if (root->fs_info->last_insert.objectid > search_start)
search_start = root->fs_info->last_insert.objectid;
path = btrfs_alloc_path();
check_failed:
btrfs_init_path(path);
ins->objectid = search_start;

90
fs/btrfs/super.c
View File

@ -130,6 +130,13 @@ static int btrfs_unlink_trans(struct btrfs_trans_handle *trans,
struct btrfs_dir_item);
objectid = btrfs_dir_objectid(di);
ret = btrfs_del_item(trans, root, path);
BUG_ON(ret);
btrfs_release_path(root, path);
ret = btrfs_lookup_dir_index_item(trans, root, path, dir->i_ino,
objectid, -1);
BUG_ON(ret);
ret = btrfs_del_item(trans, root, path);
BUG_ON(ret);
dentry->d_inode->i_ctime = dir->i_ctime;
@ -138,7 +145,7 @@ err:
btrfs_free_path(path);
if (ret == 0) {
inode_dec_link_count(dentry->d_inode);
dir->i_size -= name_len;
dir->i_size -= name_len * 2;
mark_inode_dirty(dir);
}
return ret;
@ -168,8 +175,10 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
struct btrfs_path *path;
struct btrfs_key key;
struct btrfs_trans_handle *trans;
struct btrfs_disk_key *found_key;
struct btrfs_key found_key;
int found_type;
struct btrfs_leaf *leaf;
char *goodnames = "..";
path = btrfs_alloc_path();
BUG_ON(!path);
@ -178,46 +187,42 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
trans = btrfs_start_transaction(root, 1);
key.objectid = inode->i_ino;
key.offset = (u64)-1;
key.flags = 0;
btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0) {
err = ret;
goto out;
}
key.flags = (u32)-1;
while(1) {
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0) {
err = ret;
goto out;
}
BUG_ON(ret == 0);
if (path->slots[0] == 0) {
err = -ENOENT;
goto out;
}
path->slots[0]--;
leaf = btrfs_buffer_leaf(path->nodes[0]);
btrfs_disk_key_to_cpu(&found_key,
&leaf->items[path->slots[0]].key);
found_type = btrfs_key_type(&found_key);
if (found_key.objectid != inode->i_ino) {
err = -ENOENT;
goto out;
}
if ((found_type != BTRFS_DIR_ITEM_KEY &&
found_type != BTRFS_DIR_INDEX_KEY) ||
(!btrfs_match_dir_item_name(root, path, goodnames, 2) &&
!btrfs_match_dir_item_name(root, path, goodnames, 1))) {
err = -ENOTEMPTY;
goto out;
}
ret = btrfs_del_item(trans, root, path);
BUG_ON(ret);
BUG_ON(ret == 0);
BUG_ON(path->slots[0] == 0);
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) != inode->i_ino) {
err = -ENOENT;
goto out;
}
if (btrfs_disk_key_type(found_key) != BTRFS_DIR_ITEM_KEY ||
btrfs_disk_key_offset(found_key) != 2) {
err = -ENOTEMPTY;
goto out;
}
ret = btrfs_del_item(trans, root, path);
BUG_ON(ret);
btrfs_release_path(root, path);
key.offset = 1;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0) {
err = ret;
goto out;
}
if (ret > 0) {
err = -ENOTEMPTY;
goto out;
}
ret = btrfs_del_item(trans, root, path);
if (ret) {
err = ret;
goto out;
if (found_type == BTRFS_DIR_ITEM_KEY && found_key.offset == 1)
break;
btrfs_release_path(root, path);
}
ret = 0;
btrfs_release_path(root, path);
/* now the directory is empty */
@ -676,7 +681,7 @@ static int btrfs_add_link(struct btrfs_trans_handle *trans,
dentry->d_parent->d_inode->i_ino,
inode->i_ino, 0);
if (ret == 0) {
dentry->d_parent->d_inode->i_size += dentry->d_name.len;
dentry->d_parent->d_inode->i_size += dentry->d_name.len * 2;
ret = btrfs_update_inode(trans, btrfs_sb(inode->i_sb),
dentry->d_parent->d_inode);
}
@ -754,7 +759,7 @@ static int btrfs_make_empty_dir(struct btrfs_trans_handle *trans,
dir->i_ino, 1);
if (ret)
goto error;
inode->i_size = 3;
inode->i_size = 6;
ret = btrfs_update_inode(trans, root, inode);
error:
return ret;
@ -915,7 +920,6 @@ static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
if (create)
trans = btrfs_start_transaction(root, 1);
ret = btrfs_lookup_file_extent(trans, root, path,
inode->i_ino,
iblock << inode->i_blkbits, 0);