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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 */
10 struct 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  */
58 struct 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