fs/btrfs/orphan.c

Source file repositories/reference/linux-study-clean/fs/btrfs/orphan.c

File Facts

System
Linux kernel
Corpus path
fs/btrfs/orphan.c
Extension
.c
Size
1007 bytes
Lines
49
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2008 Red Hat.  All rights reserved.
 */

#include "ctree.h"
#include "orphan.h"

int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 offset)
{
	BTRFS_PATH_AUTO_FREE(path);
	struct btrfs_key key;

	key.objectid = BTRFS_ORPHAN_OBJECTID;
	key.type = BTRFS_ORPHAN_ITEM_KEY;
	key.offset = offset;

	path = btrfs_alloc_path();
	if (!path)
		return -ENOMEM;

	return btrfs_insert_empty_item(trans, root, path, &key, 0);
}

int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, u64 offset)
{
	BTRFS_PATH_AUTO_FREE(path);
	struct btrfs_key key;
	int ret = 0;

	key.objectid = BTRFS_ORPHAN_OBJECTID;
	key.type = BTRFS_ORPHAN_ITEM_KEY;
	key.offset = offset;

	path = btrfs_alloc_path();
	if (!path)
		return -ENOMEM;

	ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
	if (ret < 0)
		return ret;
	if (ret)
		return -ENOENT;

	return btrfs_del_item(trans, root, path);
}

Annotation

Implementation Notes