1 #ifndef _LINUX_IPC_H
2 #define _LINUX_IPC_H
3
4 #include <linux/types.h>
5
6 #define IPC_PRIVATE ((__kernel_key_t) 0)
7
8 /* Obsolete, used only for backwards compatibility and libc5 compiles */
9 struct ipc_perm
10 {
11 __kernel_key_t key;
12 __kernel_uid_t uid;
13 __kernel_gid_t gid;
14 __kernel_uid_t cuid;
15 __kernel_gid_t cgid;
16 __kernel_mode_t mode;
17 unsigned short seq;
18 };
19
20 /* Include the definition of ipc64_perm */
21 #include <asm/ipcbuf.h>
22
23 /* resource get request flags */
24 #define IPC_CREAT 00001000 /* create if key is nonexistent */
25 #define IPC_EXCL 00002000 /* fail if key exists */
26 #define IPC_NOWAIT 00004000 /* return error on wait */
27
28 /* these fields are used by the DIPC package so the kernel as standard
29 should avoid using them if possible */
30
31 #define IPC_DIPC 00010000 /* make it distributed */
32 #define IPC_OWN 00020000 /* this machine is the DIPC owner */
33
34 /*
35 * Control commands used with semctl, msgctl and shmctl
36 * see also specific commands in sem.h, msg.h and shm.h
37 */
38 #define IPC_RMID 0 /* remove resource */
39 #define IPC_SET 1 /* set ipc_perm options */
40 #define IPC_STAT 2 /* get ipc_perm options */
41 #define IPC_INFO 3 /* see ipcs */
42
43 /*
44 * Version flags for semctl, msgctl, and shmctl commands
45 * These are passed as bitflags or-ed with the actual command
46 */
47 #define IPC_OLD 0 /* Old version (no 32-bit UID support on many
48 architectures) */
49 #define IPC_64 0x0100 /* New version (support 32-bit UIDs, bigger
50 message sizes, etc. */
51
52 /*
53 * These are used to wrap system calls.
54 *
55 * See architecture code for ugly details..
56 */
57 struct ipc_kludge {
58 struct msgbuf __user *msgp;
59 long msgtyp;
60 };
61
62 #define SEMOP 1
63 #define SEMGET 2
64 #define SEMCTL 3
65 #define SEMTIMEDOP 4
66 #define MSGSND 11
67 #define MSGRCV 12
68 #define MSGGET 13
69 #define MSGCTL 14
70 #define SHMAT 21
71 #define SHMDT 22
72 #define SHMGET 23
73 #define SHMCTL 24
74
75 /* Used by the DIPC package, try and avoid reusing it */
76 #define DIPC 25
77
78 #define IPCCALL(version,op) ((version)<<16 | (op))
79
80 #ifdef __KERNEL__
81
82 #include <linux/kref.h>
83 #include <linux/spinlock.h>
84
85 #define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
86
87 /* used by in-kernel data structures */
88 struct kern_ipc_perm
89 {
90 spinlock_t lock;
91 int deleted;
92 int id;
93 key_t key;
94 uid_t uid;
95 gid_t gid;
96 uid_t cuid;
97 gid_t cgid;
98 mode_t mode;
99 unsigned long seq;
100 void *security;
101 };
102
103 #endif /* __KERNEL__ */
104
105 #endif /* _LINUX_IPC_H */
106
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