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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef _UAPI_LINUX_OPENAT2_H3#define _UAPI_LINUX_OPENAT2_H4 5#include <linux/types.h>6 7/*8 * Arguments for how openat2(2) should open the target path. If only @flags and9 * @mode are non-zero, then openat2(2) operates very similarly to openat(2).10 *11 * However, unlike openat(2), unknown or invalid bits in @flags result in12 * -EINVAL rather than being silently ignored. @mode must be zero unless one of13 * {O_CREAT, O_TMPFILE} are set.14 *15 * @flags: O_* flags.16 * @mode: O_CREAT/O_TMPFILE file mode.17 * @resolve: RESOLVE_* flags.18 */19struct open_how {20 __u64 flags;21 __u64 mode;22 __u64 resolve;23};24 25/* how->resolve flags for openat2(2). */26#define RESOLVE_NO_XDEV 0x01 /* Block mount-point crossings27 (includes bind-mounts). */28#define RESOLVE_NO_MAGICLINKS 0x02 /* Block traversal through procfs-style29 "magic-links". */30#define RESOLVE_NO_SYMLINKS 0x04 /* Block traversal through all symlinks31 (implies OEXT_NO_MAGICLINKS) */32#define RESOLVE_BENEATH 0x08 /* Block "lexical" trickery like33 "..", symlinks, and absolute34 paths which escape the dirfd. */35#define RESOLVE_IN_ROOT 0x10 /* Make all jumps to "/" and ".."36 be scoped inside the dirfd37 (similar to chroot(2)). */38#define RESOLVE_CACHED 0x20 /* Only complete if resolution can be39 completed through cached lookup. May40 return -EAGAIN if that's not41 possible. */42 43#endif /* _UAPI_LINUX_OPENAT2_H */44