Christian Brauner ff2c570ef7
path: add cleanup helper
Add a simple cleanup helper so we can cleanup struct path easily.
No need for any extra machinery. Avoid DEFINE_FREE() as it causes a
local copy of struct path to be used. Just rely on path_put() directly
called from a cleanup helper.

Link: https://lore.kernel.org/r/20240607-vfs-listmount-reverse-v1-2-7877a2bfa5e5@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-06-28 09:52:05 +02:00

37 lines
854 B
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PATH_H
#define _LINUX_PATH_H
struct dentry;
struct vfsmount;
struct path {
struct vfsmount *mnt;
struct dentry *dentry;
} __randomize_layout;
extern void path_get(const struct path *);
extern void path_put(const struct path *);
static inline int path_equal(const struct path *path1, const struct path *path2)
{
return path1->mnt == path2->mnt && path1->dentry == path2->dentry;
}
static inline void path_put_init(struct path *path)
{
path_put(path);
*path = (struct path) { };
}
/*
* Cleanup macro for use with __free(path_put). Avoids dereference and
* copying @path unlike DEFINE_FREE(). path_put() will handle the empty
* path correctly just ensure @path is initialized:
*
* struct path path __free(path_put) = {};
*/
#define __free_path_put path_put
#endif /* _LINUX_PATH_H */