131 lines
2.8 KiB
C
131 lines
2.8 KiB
C
#ifndef _LINUX_IPC_H
|
|
#define _LINUX_IPC_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#define IPC_PRIVATE ((__kernel_key_t) 0)
|
|
|
|
/* Obsolete, used only for backwards compatibility and libc5 compiles */
|
|
struct ipc_perm
|
|
{
|
|
__kernel_key_t key;
|
|
__kernel_uid_t uid;
|
|
__kernel_gid_t gid;
|
|
__kernel_uid_t cuid;
|
|
__kernel_gid_t cgid;
|
|
__kernel_mode_t mode;
|
|
unsigned short seq;
|
|
};
|
|
|
|
/* Include the definition of ipc64_perm */
|
|
#include <asm/ipcbuf.h>
|
|
|
|
/* resource get request flags */
|
|
#define IPC_CREAT 00001000 /* create if key is nonexistent */
|
|
#define IPC_EXCL 00002000 /* fail if key exists */
|
|
#define IPC_NOWAIT 00004000 /* return error on wait */
|
|
|
|
/* these fields are used by the DIPC package so the kernel as standard
|
|
should avoid using them if possible */
|
|
|
|
#define IPC_DIPC 00010000 /* make it distributed */
|
|
#define IPC_OWN 00020000 /* this machine is the DIPC owner */
|
|
|
|
/*
|
|
* Control commands used with semctl, msgctl and shmctl
|
|
* see also specific commands in sem.h, msg.h and shm.h
|
|
*/
|
|
#define IPC_RMID 0 /* remove resource */
|
|
#define IPC_SET 1 /* set ipc_perm options */
|
|
#define IPC_STAT 2 /* get ipc_perm options */
|
|
#define IPC_INFO 3 /* see ipcs */
|
|
|
|
/*
|
|
* Version flags for semctl, msgctl, and shmctl commands
|
|
* These are passed as bitflags or-ed with the actual command
|
|
*/
|
|
#define IPC_OLD 0 /* Old version (no 32-bit UID support on many
|
|
architectures) */
|
|
#define IPC_64 0x0100 /* New version (support 32-bit UIDs, bigger
|
|
message sizes, etc. */
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/kref.h>
|
|
|
|
#define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
|
|
|
|
/* used by in-kernel data structures */
|
|
struct kern_ipc_perm
|
|
{
|
|
spinlock_t lock;
|
|
int deleted;
|
|
key_t key;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
uid_t cuid;
|
|
gid_t cgid;
|
|
mode_t mode;
|
|
unsigned long seq;
|
|
void *security;
|
|
};
|
|
|
|
struct ipc_ids;
|
|
struct ipc_namespace {
|
|
struct kref kref;
|
|
struct ipc_ids *ids[3];
|
|
|
|
int sem_ctls[4];
|
|
int used_sems;
|
|
|
|
int msg_ctlmax;
|
|
int msg_ctlmnb;
|
|
int msg_ctlmni;
|
|
|
|
size_t shm_ctlmax;
|
|
size_t shm_ctlall;
|
|
int shm_ctlmni;
|
|
int shm_tot;
|
|
};
|
|
|
|
extern struct ipc_namespace init_ipc_ns;
|
|
|
|
#ifdef CONFIG_SYSVIPC
|
|
#define INIT_IPC_NS(ns) .ns = &init_ipc_ns,
|
|
extern struct ipc_namespace *copy_ipcs(unsigned long flags,
|
|
struct ipc_namespace *ns);
|
|
#else
|
|
#define INIT_IPC_NS(ns)
|
|
static inline struct ipc_namespace *copy_ipcs(unsigned long flags,
|
|
struct ipc_namespace *ns)
|
|
{
|
|
return ns;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_IPC_NS
|
|
extern void free_ipc_ns(struct kref *kref);
|
|
#endif
|
|
|
|
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
|
|
{
|
|
#ifdef CONFIG_IPC_NS
|
|
if (ns)
|
|
kref_get(&ns->kref);
|
|
#endif
|
|
return ns;
|
|
}
|
|
|
|
static inline void put_ipc_ns(struct ipc_namespace *ns)
|
|
{
|
|
#ifdef CONFIG_IPC_NS
|
|
kref_put(&ns->kref, free_ipc_ns);
|
|
#endif
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_IPC_H */
|
|
|
|
|