16f52b16cSGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 28a1ab315SDavid Howells #ifndef __ASM_GENERIC_MSGBUF_H 38a1ab315SDavid Howells #define __ASM_GENERIC_MSGBUF_H 48a1ab315SDavid Howells 58a1ab315SDavid Howells #include <asm/bitsperlong.h> 69ef0e004SMasahiro Yamada #include <asm/ipcbuf.h> 79ef0e004SMasahiro Yamada 88a1ab315SDavid Howells /* 98a1ab315SDavid Howells * generic msqid64_ds structure. 108a1ab315SDavid Howells * 118a1ab315SDavid Howells * Note extra padding because this structure is passed back and forth 128a1ab315SDavid Howells * between kernel and user space. 138a1ab315SDavid Howells * 148a1ab315SDavid Howells * msqid64_ds was originally meant to be architecture specific, but 158a1ab315SDavid Howells * everyone just ended up making identical copies without specific 168a1ab315SDavid Howells * optimizations, so we may just as well all use the same one. 178a1ab315SDavid Howells * 18caf5e32dSArnd Bergmann * 64 bit architectures use a 64-bit long time field here, while 19caf5e32dSArnd Bergmann * 32 bit architectures have a pair of unsigned long values. 20caf5e32dSArnd Bergmann * On big-endian systems, the lower half is in the wrong place. 218a1ab315SDavid Howells * 228a1ab315SDavid Howells * Pad space is left for: 238a1ab315SDavid Howells * - 2 miscellaneous 32-bit values 248a1ab315SDavid Howells */ 258a1ab315SDavid Howells 268a1ab315SDavid Howells struct msqid64_ds { 278a1ab315SDavid Howells struct ipc64_perm msg_perm; 28f991f015SArnd Bergmann #if __BITS_PER_LONG == 64 29caf5e32dSArnd Bergmann long msg_stime; /* last msgsnd time */ 30caf5e32dSArnd Bergmann long msg_rtime; /* last msgrcv time */ 31caf5e32dSArnd Bergmann long msg_ctime; /* last change time */ 32f991f015SArnd Bergmann #else 33f991f015SArnd Bergmann unsigned long msg_stime; /* last msgsnd time */ 34f991f015SArnd Bergmann unsigned long msg_stime_high; 35f991f015SArnd Bergmann unsigned long msg_rtime; /* last msgrcv time */ 36f991f015SArnd Bergmann unsigned long msg_rtime_high; 37f991f015SArnd Bergmann unsigned long msg_ctime; /* last change time */ 38f991f015SArnd Bergmann unsigned long msg_ctime_high; 398a1ab315SDavid Howells #endif 40f991f015SArnd Bergmann unsigned long msg_cbytes; /* current number of bytes on queue */ 41f991f015SArnd Bergmann unsigned long msg_qnum; /* number of messages in queue */ 42f991f015SArnd Bergmann unsigned long msg_qbytes; /* max number of bytes on queue */ 438a1ab315SDavid Howells __kernel_pid_t msg_lspid; /* pid of last msgsnd */ 448a1ab315SDavid Howells __kernel_pid_t msg_lrpid; /* last receive pid */ 45f991f015SArnd Bergmann unsigned long __unused4; 46f991f015SArnd Bergmann unsigned long __unused5; 478a1ab315SDavid Howells }; 488a1ab315SDavid Howells 498a1ab315SDavid Howells #endif /* __ASM_GENERIC_MSGBUF_H */ 50