1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
2 | #ifndef _UAPI_LINUX_OPENAT2_H |
3 | #define _UAPI_LINUX_OPENAT2_H |
4 | |
5 | #include <linux/types.h> |
6 | |
7 | /* |
8 | * Arguments for how openat2(2) should open the target path. If only @flags and |
9 | * @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 in |
12 | * -EINVAL rather than being silently ignored. @mode must be zero unless one of |
13 | * {O_CREAT, O_TMPFILE} are set. |
14 | * |
15 | * @flags: O_* flags. |
16 | * @mode: O_CREAT/O_TMPFILE file mode. |
17 | * @resolve: RESOLVE_* flags. |
18 | */ |
19 | struct 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 crossings |
27 | (includes bind-mounts). */ |
28 | #define RESOLVE_NO_MAGICLINKS 0x02 /* Block traversal through procfs-style |
29 | "magic-links". */ |
30 | #define RESOLVE_NO_SYMLINKS 0x04 /* Block traversal through all symlinks |
31 | (implies OEXT_NO_MAGICLINKS) */ |
32 | #define RESOLVE_BENEATH 0x08 /* Block "lexical" trickery like |
33 | "..", symlinks, and absolute |
34 | paths which escape the dirfd. */ |
35 | #define RESOLVE_IN_ROOT 0x10 /* Make all jumps to "/" and ".." |
36 | be scoped inside the dirfd |
37 | (similar to chroot(2)). */ |
38 | #define RESOLVE_CACHED 0x20 /* Only complete if resolution can be |
39 | completed through cached lookup. May |
40 | return -EAGAIN if that's not |
41 | possible. */ |
42 | |
43 | #endif /* _UAPI_LINUX_OPENAT2_H */ |
44 | |