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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef __ASM_GENERIC_MSGBUF_H3#define __ASM_GENERIC_MSGBUF_H4 5#include <asm/bitsperlong.h>6#include <asm/ipcbuf.h>7 8/*9 * generic msqid64_ds structure.10 *11 * Note extra padding because this structure is passed back and forth12 * between kernel and user space.13 *14 * msqid64_ds was originally meant to be architecture specific, but15 * everyone just ended up making identical copies without specific16 * optimizations, so we may just as well all use the same one.17 *18 * 64 bit architectures use a 64-bit long time field here, while19 * 32 bit architectures have a pair of unsigned long values.20 * On big-endian systems, the lower half is in the wrong place.21 *22 * Pad space is left for:23 * - 2 miscellaneous 32-bit values24 */25 26struct msqid64_ds {27 struct ipc64_perm msg_perm;28#if __BITS_PER_LONG == 6429 long msg_stime; /* last msgsnd time */30 long msg_rtime; /* last msgrcv time */31 long msg_ctime; /* last change time */32#else33 unsigned long msg_stime; /* last msgsnd time */34 unsigned long msg_stime_high;35 unsigned long msg_rtime; /* last msgrcv time */36 unsigned long msg_rtime_high;37 unsigned long msg_ctime; /* last change time */38 unsigned long msg_ctime_high;39#endif40 unsigned long msg_cbytes; /* current number of bytes on queue */41 unsigned long msg_qnum; /* number of messages in queue */42 unsigned long msg_qbytes; /* max number of bytes on queue */43 __kernel_pid_t msg_lspid; /* pid of last msgsnd */44 __kernel_pid_t msg_lrpid; /* last receive pid */45 unsigned long __unused4;46 unsigned long __unused5;47};48 49#endif /* __ASM_GENERIC_MSGBUF_H */50