1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2#ifndef __ASM_GENERIC_IPCBUF_H
 3#define __ASM_GENERIC_IPCBUF_H
 4
 5/*
 6 * The generic ipc64_perm structure:
 7 * Note extra padding because this structure is passed back and forth
 8 * between kernel and user space.
 9 *
10 * ipc64_perm was originally meant to be architecture specific, but
11 * everyone just ended up making identical copies without specific
12 * optimizations, so we may just as well all use the same one.
13 *
14 * Pad space is left for:
15 * - 32-bit mode_t on architectures that only had 16 bit
16 * - 32-bit seq
17 * - 2 miscellaneous 32-bit values
18 */
19
20struct ipc64_perm {
21	__kernel_key_t		key;
22	__kernel_uid32_t	uid;
23	__kernel_gid32_t	gid;
24	__kernel_uid32_t	cuid;
25	__kernel_gid32_t	cgid;
26	__kernel_mode_t		mode;
27				/* pad if mode_t is u16: */
28	unsigned char		__pad1[4 - sizeof(__kernel_mode_t)];
29	unsigned short		seq;
30	unsigned short		__pad2;
31	__kernel_ulong_t	__unused1;
32	__kernel_ulong_t	__unused2;
33};
34
35#endif /* __ASM_GENERIC_IPCBUF_H */