Btrfs: more inode indexed directory work

Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/ctree.h

@@ -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 */

fs/btrfs/dir-item.c

@@ -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)

fs/btrfs/extent-tree.c

@@ -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;

fs/btrfs/super.c

@@ -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 @@ static int btrfs_unlink_trans(struct btrfs_trans_handle *trans,
 	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);
+	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);
-	BUG_ON(path->slots[0] == 0);
+		if (path->slots[0] == 0) {
+			err = -ENOENT;
+			goto out;
+		}
 		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) {
+		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 (btrfs_disk_key_type(found_key) != BTRFS_DIR_ITEM_KEY ||
-	    btrfs_disk_key_offset(found_key) != 2) {
+		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);
+
+		if (found_type == BTRFS_DIR_ITEM_KEY && found_key.offset == 1)
+			break;
 		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;
 	}
+	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);