1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _ASM_SHMBUF_H
3 #define _ASM_SHMBUF_H
4
5 /*
6 * The shmid64_ds structure for the MIPS architecture.
7 * Note extra padding because this structure is passed back and forth
8 * between kernel and user space.
9 *
10 * As MIPS was lacking proper padding after shm_?time, we use 48 bits
11 * of the padding at the end to store a few additional bits of the time.
12 * libc implementations need to take care to convert this into a proper
13 * data structure when moving to 64-bit time_t.
14 */
15
16 #ifdef __mips64
17 struct shmid64_ds {
18 struct ipc64_perm shm_perm; /* operation perms */
19 size_t shm_segsz; /* size of segment (bytes) */
20 __kernel_time_t shm_atime; /* last attach time */
21 __kernel_time_t shm_dtime; /* last detach time */
22 __kernel_time_t shm_ctime; /* last change time */
23 __kernel_pid_t shm_cpid; /* pid of creator */
24 __kernel_pid_t shm_lpid; /* pid of last operator */
25 unsigned long shm_nattch; /* no. of current attaches */
26 unsigned long __unused1;
27 unsigned long __unused2;
28 };
29 #else
30 struct shmid64_ds {
31 struct ipc64_perm shm_perm; /* operation perms */
32 size_t shm_segsz; /* size of segment (bytes) */
33 unsigned long shm_atime; /* last attach time */
34 unsigned long shm_dtime; /* last detach time */
35 unsigned long shm_ctime; /* last change time */
36 __kernel_pid_t shm_cpid; /* pid of creator */
37 __kernel_pid_t shm_lpid; /* pid of last operator */
38 unsigned long shm_nattch; /* no. of current attaches */
39 unsigned short shm_atime_high;
40 unsigned short shm_dtime_high;
41 unsigned short shm_ctime_high;
42 unsigned short __unused1;
43 };
44 #endif
45
46 struct shminfo64 {
47 unsigned long shmmax;
48 unsigned long shmmin;
49 unsigned long shmmni;
50 unsigned long shmseg;
51 unsigned long shmall;
52 unsigned long __unused1;
53 unsigned long __unused2;
54 unsigned long __unused3;
55 unsigned long __unused4;
56 };
57
58 #endif /* _ASM_SHMBUF_H */