1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _UAPI_LINUX_IPC_H
3#define _UAPI_LINUX_IPC_H
4
5#include <linux/types.h>
6
7#define IPC_PRIVATE ((__kernel_key_t) 0)
8
9/* Obsolete, used only for backwards compatibility and libc5 compiles */
10struct ipc_perm
11{
12 __kernel_key_t key;
13 __kernel_uid_t uid;
14 __kernel_gid_t gid;
15 __kernel_uid_t cuid;
16 __kernel_gid_t cgid;
17 __kernel_mode_t mode;
18 unsigned short seq;
19};
20
21/* Include the definition of ipc64_perm */
22#include <asm/ipcbuf.h>
23
24/* resource get request flags */
25#define IPC_CREAT 00001000 /* create if key is nonexistent */
26#define IPC_EXCL 00002000 /* fail if key exists */
27#define IPC_NOWAIT 00004000 /* return error on wait */
28
29/* these fields are used by the DIPC package so the kernel as standard
30 should avoid using them if possible */
31
32#define IPC_DIPC 00010000 /* make it distributed */
33#define IPC_OWN 00020000 /* this machine is the DIPC owner */
34
35/*
36 * Control commands used with semctl, msgctl and shmctl
37 * see also specific commands in sem.h, msg.h and shm.h
38 */
39#define IPC_RMID 0 /* remove resource */
40#define IPC_SET 1 /* set ipc_perm options */
41#define IPC_STAT 2 /* get ipc_perm options */
42#define IPC_INFO 3 /* see ipcs */
43
44/*
45 * Version flags for semctl, msgctl, and shmctl commands
46 * These are passed as bitflags or-ed with the actual command
47 */
48#define IPC_OLD 0 /* Old version (no 32-bit UID support on many
49 architectures) */
50#define IPC_64 0x0100 /* New version (support 32-bit UIDs, bigger
51 message sizes, etc. */
52
53/*
54 * These are used to wrap system calls.
55 *
56 * See architecture code for ugly details..
57 */
58struct ipc_kludge {
59 struct msgbuf __user *msgp;
60 long msgtyp;
61};
62
63#define SEMOP 1
64#define SEMGET 2
65#define SEMCTL 3
66#define SEMTIMEDOP 4
67#define MSGSND 11
68#define MSGRCV 12
69#define MSGGET 13
70#define MSGCTL 14
71#define SHMAT 21
72#define SHMDT 22
73#define SHMGET 23
74#define SHMCTL 24
75
76/* Used by the DIPC package, try and avoid reusing it */
77#define DIPC 25
78
79#define IPCCALL(version,op) ((version)<<16 | (op))
80
81
82#endif /* _UAPI_LINUX_IPC_H */
83