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btrfs_rmdir 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-03-27 13:42:32 -04:00 committed by David Woodhouse
parent 9773a78868
commit 5f443fd280
1 changed files with 93 additions and 13 deletions
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106
fs/btrfs/super.c
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@ -81,11 +81,12 @@ static void btrfs_read_locked_inode(struct inode *inode)
return;
}
static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
static int btrfs_unlink_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *dir,
struct dentry *dentry)
{
struct btrfs_path path;
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
const char *name = dentry->d_name.name;
int name_len = dentry->d_name.len;
int ret;
@ -93,10 +94,6 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
struct btrfs_dir_item *di;
btrfs_init_path(&path);
root = btrfs_sb(dir->i_sb);
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
ret = btrfs_lookup_dir_item(trans, root, &path, dir->i_ino,
name, name_len, -1);
if (ret < 0)
@ -114,13 +111,98 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
dentry->d_inode->i_ctime = dir->i_ctime;
err:
btrfs_release_path(root, &path);
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
if (ret == 0)
inode_dec_link_count(dentry->d_inode);
return ret;
}
static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
{
struct btrfs_root *root;
struct btrfs_trans_handle *trans;
int ret;
root = btrfs_sb(dir->i_sb);
mutex_lock(&root->fs_info->fs_mutex);
trans = btrfs_start_transaction(root, 1);
ret = btrfs_unlink_trans(trans, root, dir, dentry);
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
return ret;
}
static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
int err;
int ret;
struct btrfs_root *root = btrfs_sb(dir->i_sb);
struct btrfs_path path;
struct btrfs_key key;
struct btrfs_trans_handle *trans;
struct btrfs_disk_key *found_key;
struct btrfs_leaf *leaf;
btrfs_init_path(&path);
mutex_lock(&root->fs_info->fs_mutex);
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;
}
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;
}
btrfs_release_path(root, &path);
/* now the directory is empty */
err = btrfs_unlink_trans(trans, root, dir, dentry);
if (!err) {
inode->i_size = 0;
}
out:
mutex_unlock(&root->fs_info->fs_mutex);
ret = btrfs_end_transaction(trans, root);
if (ret && !err)
err = ret;
return err;
}
static int btrfs_free_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *inode)
@ -191,9 +273,6 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
break;
if (btrfs_disk_key_type(found_key) != BTRFS_EXTENT_DATA_KEY)
break;
if (btrfs_disk_key_offset(found_key) < inode->i_size)
break;
/* FIXME: add extent truncation */
if (btrfs_disk_key_offset(found_key) < inode->i_size)
break;
fi = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]),
@ -209,7 +288,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
ret = btrfs_free_extent(trans, root, extent_start,
extent_num_blocks, 0);
BUG_ON(ret);
if (btrfs_disk_key_offset(found_key) == 0)
if (key.offset + 1 == 0)
break;
}
btrfs_release_path(root, &path);
@ -852,6 +931,7 @@ static struct inode_operations btrfs_dir_inode_operations = {
.create = btrfs_create,
.unlink = btrfs_unlink,
.mkdir = btrfs_mkdir,
.rmdir = btrfs_rmdir,
};
static struct file_operations btrfs_dir_file_operations = {