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 | #include <asm/ipcbuf.h> |
7 | |
8 | /* |
9 | * generic msqid64_ds structure. |
10 | * |
11 | * Note extra padding because this structure is passed back and forth |
12 | * between kernel and user space. |
13 | * |
14 | * msqid64_ds was originally meant to be architecture specific, but |
15 | * everyone just ended up making identical copies without specific |
16 | * 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, while |
19 | * 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 values |
24 | */ |
25 | |
26 | struct msqid64_ds { |
27 | struct ipc64_perm msg_perm; |
28 | #if __BITS_PER_LONG == 64 |
29 | long msg_stime; /* last msgsnd time */ |
30 | long msg_rtime; /* last msgrcv time */ |
31 | long msg_ctime; /* last change time */ |
32 | #else |
33 | 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 | #endif |
40 | 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 | |