[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / msg.h

#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; 
};

/*
 * Scaling factor to compute msgmni:
 * the memory dedicated to msg queues (msgmni * msgmnb) should occupy
 * at most 1/MSG_MEM_SCALE of the lowmem (see the formula in ipc/msg.c):
 * up to 8MB       : msgmni = 16 (MSGMNI)
 * 4 GB            : msgmni = 8K
 * more than 16 GB : msgmni = 32K (IPCMNI)
 */
#define MSG_MEM_SCALE 32

#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 kbytes 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 */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_MSG_H
	2	#define _LINUX_MSG_H
	3
	4	#include <linux/ipc.h>
1da177e4 LT	5
	6	/* ipcs ctl commands */
	7	#define MSG_STAT 11
	8	#define MSG_INFO 12
	9
	10	/* msgrcv options */
	11	#define MSG_NOERROR 010000 /* no error if message is too big */
	12	#define MSG_EXCEPT 020000 /* recv any msg except of specified type.*/
	13
	14	/* Obsolete, used only for backwards compatibility and libc5 compiles */
	15	struct msqid_ds {
	16	struct ipc_perm msg_perm;
	17	struct msg msg_first; / first message on queue,unused */
	18	struct msg msg_last; / last message in queue,unused */
	19	__kernel_time_t msg_stime; /* last msgsnd time */
	20	__kernel_time_t msg_rtime; /* last msgrcv time */
	21	__kernel_time_t msg_ctime; /* last change time */
	22	unsigned long msg_lcbytes; /* Reuse junk fields for 32 bit */
	23	unsigned long msg_lqbytes; /* ditto */
	24	unsigned short msg_cbytes; /* current number of bytes on queue */
	25	unsigned short msg_qnum; /* number of messages in queue */
	26	unsigned short msg_qbytes; /* max number of bytes on queue */
	27	__kernel_ipc_pid_t msg_lspid; /* pid of last msgsnd */
	28	__kernel_ipc_pid_t msg_lrpid; /* last receive pid */
	29	};
	30
	31	/* Include the definition of msqid64_ds */
	32	#include <asm/msgbuf.h>
	33
	34	/* message buffer for msgsnd and msgrcv calls */
	35	struct msgbuf {
	36	long mtype; /* type of message */
	37	char mtext[1]; /* message text */
	38	};
	39
	40	/* buffer for msgctl calls IPC_INFO, MSG_INFO */
	41	struct msginfo {
	42	int msgpool;
	43	int msgmap;
	44	int msgmax;
	45	int msgmnb;
	46	int msgmni;
	47	int msgssz;
	48	int msgtql;
	49	unsigned short msgseg;
	50	};
	51
f7bf3df8 ND	52	/*
	53	* Scaling factor to compute msgmni:
	54	* the memory dedicated to msg queues (msgmni * msgmnb) should occupy
	55	* at most 1/MSG_MEM_SCALE of the lowmem (see the formula in ipc/msg.c):
	56	* up to 8MB : msgmni = 16 (MSGMNI)
	57	* 4 GB : msgmni = 8K
	58	* more than 16 GB : msgmni = 32K (IPCMNI)
	59	*/
	60	#define MSG_MEM_SCALE 32
	61
1da177e4 LT	62	#define MSGMNI 16 /* <= IPCMNI / / max # of msg queue identifiers */
	63	#define MSGMAX 8192 /* <= INT_MAX / / max size of message (bytes) */
	64	#define MSGMNB 16384 /* <= INT_MAX / / default max size of a message queue */
	65
	66	/* unused */
68aa0a20	67	#define MSGPOOL (MSGMNI * MSGMNB / 1024) /* size in kbytes of message pool */
1da177e4 LT	68	#define MSGTQL MSGMNB /* number of system message headers */
	69	#define MSGMAP MSGMNB /* number of entries in message map */
	70	#define MSGSSZ 16 /* message segment size */
68aa0a20	71	#define __MSGSEG ((MSGPOOL * 1024) / MSGSSZ) /* max no. of segments */
1da177e4 LT	72	#define MSGSEG (__MSGSEG <= 0xffff ? __MSGSEG : 0xffff)
	73
	74	#ifdef __KERNEL__
77597ad6	75	#include <linux/list.h>
1da177e4 LT	76
	77	/* one msg_msg structure for each message */
	78	struct msg_msg {
	79	struct list_head m_list;
	80	long m_type;
	81	int m_ts; /* message text size */
	82	struct msg_msgseg* next;
	83	void *security;
	84	/* the actual message follows immediately */
	85	};
	86
	87	/* one msq_queue structure for each present queue on the system */
	88	struct msg_queue {
	89	struct kern_ipc_perm q_perm;
	90	time_t q_stime; /* last msgsnd time */
	91	time_t q_rtime; /* last msgrcv time */
	92	time_t q_ctime; /* last change time */
	93	unsigned long q_cbytes; /* current number of bytes on queue */
	94	unsigned long q_qnum; /* number of messages in queue */
	95	unsigned long q_qbytes; /* max number of bytes on queue */
	96	pid_t q_lspid; /* pid of last msgsnd */
	97	pid_t q_lrpid; /* last receive pid */
	98
	99	struct list_head q_messages;
	100	struct list_head q_receivers;
	101	struct list_head q_senders;
	102	};
	103
651971cb	104	/* Helper routines for sys_msgsnd and sys_msgrcv */
	105	extern long do_msgsnd(int msqid, long mtype, void __user *mtext,
	106	size_t msgsz, int msgflg);
	107	extern long do_msgrcv(int msqid, long pmtype, void __user mtext,
	108	size_t msgsz, long msgtyp, int msgflg);
	109
1da177e4 LT	110	#endif /* __KERNEL__ */
	111
	112	#endif /* _LINUX_MSG_H */