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