mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
7ca7e564e0
This patch introduces ipcs storage into IDRs. The main changes are:
. This ipc_ids structure is changed: the entries array is changed into a
root idr structure.
. The grow_ary() routine is removed: it is not needed anymore when adding
an ipc structure, since we are now using the IDR facility.
. The ipc_rmid() routine interface is changed:
. there is no need for this routine to return the pointer passed in as
argument: it is now declared as a void
. since the id is now part of the kern_ipc_perm structure, no need to
have it as an argument to the routine
Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
#ifndef _LINUX_MSG_H
|
|
#define _LINUX_MSG_H
|
|
|
|
#include <linux/ipc.h>
|
|
|
|
/* ipcs ctl commands */
|
|
#define MSG_STAT 11
|
|
#define MSG_INFO 12
|
|
|
|
/* msgrcv options */
|
|
#define MSG_NOERROR 010000 /* no error if message is too big */
|
|
#define MSG_EXCEPT 020000 /* recv any msg except of specified type.*/
|
|
|
|
/* Obsolete, used only for backwards compatibility and libc5 compiles */
|
|
struct msqid_ds {
|
|
struct ipc_perm msg_perm;
|
|
struct msg *msg_first; /* first message on queue,unused */
|
|
struct msg *msg_last; /* last message in queue,unused */
|
|
__kernel_time_t msg_stime; /* last msgsnd time */
|
|
__kernel_time_t msg_rtime; /* last msgrcv time */
|
|
__kernel_time_t msg_ctime; /* last change time */
|
|
unsigned long msg_lcbytes; /* Reuse junk fields for 32 bit */
|
|
unsigned long msg_lqbytes; /* ditto */
|
|
unsigned short msg_cbytes; /* current number of bytes on queue */
|
|
unsigned short msg_qnum; /* number of messages in queue */
|
|
unsigned short msg_qbytes; /* max number of bytes on queue */
|
|
__kernel_ipc_pid_t msg_lspid; /* pid of last msgsnd */
|
|
__kernel_ipc_pid_t msg_lrpid; /* last receive pid */
|
|
};
|
|
|
|
/* Include the definition of msqid64_ds */
|
|
#include <asm/msgbuf.h>
|
|
|
|
/* message buffer for msgsnd and msgrcv calls */
|
|
struct msgbuf {
|
|
long mtype; /* type of message */
|
|
char mtext[1]; /* message text */
|
|
};
|
|
|
|
/* buffer for msgctl calls IPC_INFO, MSG_INFO */
|
|
struct msginfo {
|
|
int msgpool;
|
|
int msgmap;
|
|
int msgmax;
|
|
int msgmnb;
|
|
int msgmni;
|
|
int msgssz;
|
|
int msgtql;
|
|
unsigned short msgseg;
|
|
};
|
|
|
|
#define MSGMNI 16 /* <= IPCMNI */ /* max # of msg queue identifiers */
|
|
#define MSGMAX 8192 /* <= INT_MAX */ /* max size of message (bytes) */
|
|
#define MSGMNB 16384 /* <= INT_MAX */ /* default max size of a message queue */
|
|
|
|
/* unused */
|
|
#define MSGPOOL (MSGMNI*MSGMNB/1024) /* size in kilobytes of message pool */
|
|
#define MSGTQL MSGMNB /* number of system message headers */
|
|
#define MSGMAP MSGMNB /* number of entries in message map */
|
|
#define MSGSSZ 16 /* message segment size */
|
|
#define __MSGSEG ((MSGPOOL*1024)/ MSGSSZ) /* max no. of segments */
|
|
#define MSGSEG (__MSGSEG <= 0xffff ? __MSGSEG : 0xffff)
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/list.h>
|
|
|
|
/* one msg_msg structure for each message */
|
|
struct msg_msg {
|
|
struct list_head m_list;
|
|
long m_type;
|
|
int m_ts; /* message text size */
|
|
struct msg_msgseg* next;
|
|
void *security;
|
|
/* the actual message follows immediately */
|
|
};
|
|
|
|
/* one msq_queue structure for each present queue on the system */
|
|
struct msg_queue {
|
|
struct kern_ipc_perm q_perm;
|
|
time_t q_stime; /* last msgsnd time */
|
|
time_t q_rtime; /* last msgrcv time */
|
|
time_t q_ctime; /* last change time */
|
|
unsigned long q_cbytes; /* current number of bytes on queue */
|
|
unsigned long q_qnum; /* number of messages in queue */
|
|
unsigned long q_qbytes; /* max number of bytes on queue */
|
|
pid_t q_lspid; /* pid of last msgsnd */
|
|
pid_t q_lrpid; /* last receive pid */
|
|
|
|
struct list_head q_messages;
|
|
struct list_head q_receivers;
|
|
struct list_head q_senders;
|
|
};
|
|
|
|
/* Helper routines for sys_msgsnd and sys_msgrcv */
|
|
extern long do_msgsnd(int msqid, long mtype, void __user *mtext,
|
|
size_t msgsz, int msgflg);
|
|
extern long do_msgrcv(int msqid, long *pmtype, void __user *mtext,
|
|
size_t msgsz, long msgtyp, int msgflg);
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_MSG_H */
|