1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2#ifndef __ASM_GENERIC_MSGBUF_H
 3#define __ASM_GENERIC_MSGBUF_H
 4
 5#include <asm/bitsperlong.h>
 6/*
 7 * generic msqid64_ds structure.
 8 *
 9 * Note extra padding because this structure is passed back and forth
10 * between kernel and user space.
11 *
12 * msqid64_ds was originally meant to be architecture specific, but
13 * everyone just ended up making identical copies without specific
14 * optimizations, so we may just as well all use the same one.
15 *
16 * 64 bit architectures typically define a 64 bit __kernel_time_t,
17 * so they do not need the first three padding words.
18 * On big-endian systems, the padding is in the wrong place.
19 *
20 * Pad space is left for:
21 * - 2 miscellaneous 32-bit values
22 */
23
24struct msqid64_ds {
25	struct ipc64_perm msg_perm;
26#if __BITS_PER_LONG == 64
27	__kernel_time_t msg_stime;	/* last msgsnd time */
28	__kernel_time_t msg_rtime;	/* last msgrcv time */
29	__kernel_time_t msg_ctime;	/* last change time */
30#else
31	unsigned long	msg_stime;	/* last msgsnd time */
32	unsigned long	msg_stime_high;
33	unsigned long	msg_rtime;	/* last msgrcv time */
34	unsigned long	msg_rtime_high;
35	unsigned long	msg_ctime;	/* last change time */
36	unsigned long	msg_ctime_high;
37#endif
38	unsigned long	msg_cbytes;	/* current number of bytes on queue */
39	unsigned long	msg_qnum;	/* number of messages in queue */
40	unsigned long	 msg_qbytes;	/* max number of bytes on queue */
41	__kernel_pid_t msg_lspid;	/* pid of last msgsnd */
42	__kernel_pid_t msg_lrpid;	/* last receive pid */
43	unsigned long	 __unused4;
44	unsigned long	 __unused5;
45};
46
47#endif /* __ASM_GENERIC_MSGBUF_H */