| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | |
| 24 | struct 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 */ |