/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_OPENAT2_H
#define _LINUX_OPENAT2_H
#include <linux/types.h>
/*
* Arguments for how openat2(2) should open the target path. If only @flags and
* @mode are non-zero, then openat2(2) operates very similarly to openat(2).
*
* However, unlike openat(2), unknown or invalid bits in @flags result in
* -EINVAL rather than being silently ignored. @mode must be zero unless one of
* {O_CREAT, O_TMPFILE} are set.
*
* @flags: O_* flags.
* @mode: O_CREAT/O_TMPFILE file mode.
* @resolve: RESOLVE_* flags.
*/
struct open_how {
__u64 flags;
__u64 mode;
__u64 resolve;
};
/* how->resolve flags for openat2(2). */
#define RESOLVE_NO_XDEV 0x01 /* Block mount-point crossings
(includes bind-mounts). */
#define RESOLVE_NO_MAGICLINKS 0x02 /* Block traversal through procfs-style
"magic-links". */
#define RESOLVE_NO_SYMLINKS 0x04 /* Block traversal through all symlinks
(implies OEXT_NO_MAGICLINKS) */
#define RESOLVE_BENEATH 0x08 /* Block "lexical" trickery like
"..", symlinks, and absolute
paths which escape the dirfd. */
#define RESOLVE_IN_ROOT 0x10 /* Make all jumps to "/" and ".."
be scoped inside the dirfd
(similar to chroot(2)). */
#define RESOLVE_CACHED 0x20 /* Only complete if resolution can be
completed through cached lookup. May
return -EAGAIN if that's not
possible. */
#endif /* _LINUX_OPENAT2_H */
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