1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef __ASM_GENERIC_MSGBUF_H 3*4882a593Smuzhiyun #define __ASM_GENERIC_MSGBUF_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <asm/bitsperlong.h> 6*4882a593Smuzhiyun #include <asm/ipcbuf.h> 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun /* 9*4882a593Smuzhiyun * generic msqid64_ds structure. 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun * Note extra padding because this structure is passed back and forth 12*4882a593Smuzhiyun * between kernel and user space. 13*4882a593Smuzhiyun * 14*4882a593Smuzhiyun * msqid64_ds was originally meant to be architecture specific, but 15*4882a593Smuzhiyun * everyone just ended up making identical copies without specific 16*4882a593Smuzhiyun * optimizations, so we may just as well all use the same one. 17*4882a593Smuzhiyun * 18*4882a593Smuzhiyun * 64 bit architectures use a 64-bit long time field here, while 19*4882a593Smuzhiyun * 32 bit architectures have a pair of unsigned long values. 20*4882a593Smuzhiyun * On big-endian systems, the lower half is in the wrong place. 21*4882a593Smuzhiyun * 22*4882a593Smuzhiyun * Pad space is left for: 23*4882a593Smuzhiyun * - 2 miscellaneous 32-bit values 24*4882a593Smuzhiyun */ 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun struct msqid64_ds { 27*4882a593Smuzhiyun struct ipc64_perm msg_perm; 28*4882a593Smuzhiyun #if __BITS_PER_LONG == 64 29*4882a593Smuzhiyun long msg_stime; /* last msgsnd time */ 30*4882a593Smuzhiyun long msg_rtime; /* last msgrcv time */ 31*4882a593Smuzhiyun long msg_ctime; /* last change time */ 32*4882a593Smuzhiyun #else 33*4882a593Smuzhiyun unsigned long msg_stime; /* last msgsnd time */ 34*4882a593Smuzhiyun unsigned long msg_stime_high; 35*4882a593Smuzhiyun unsigned long msg_rtime; /* last msgrcv time */ 36*4882a593Smuzhiyun unsigned long msg_rtime_high; 37*4882a593Smuzhiyun unsigned long msg_ctime; /* last change time */ 38*4882a593Smuzhiyun unsigned long msg_ctime_high; 39*4882a593Smuzhiyun #endif 40*4882a593Smuzhiyun unsigned long msg_cbytes; /* current number of bytes on queue */ 41*4882a593Smuzhiyun unsigned long msg_qnum; /* number of messages in queue */ 42*4882a593Smuzhiyun unsigned long msg_qbytes; /* max number of bytes on queue */ 43*4882a593Smuzhiyun __kernel_pid_t msg_lspid; /* pid of last msgsnd */ 44*4882a593Smuzhiyun __kernel_pid_t msg_lrpid; /* last receive pid */ 45*4882a593Smuzhiyun unsigned long __unused4; 46*4882a593Smuzhiyun unsigned long __unused5; 47*4882a593Smuzhiyun }; 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun #endif /* __ASM_GENERIC_MSGBUF_H */ 50