diff options
Diffstat (limited to 'include/linux/msg.h')
| -rw-r--r-- | include/linux/msg.h | 88 |
1 files changed, 9 insertions, 79 deletions
diff --git a/include/linux/msg.h b/include/linux/msg.h index 56abf1558fd..f3f302f9c19 100644 --- a/include/linux/msg.h +++ b/include/linux/msg.h @@ -1,85 +1,15 @@ #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> +#include <uapi/linux/msg.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; + struct list_head m_list; + long m_type; + size_t m_ts; /* message text size */ + struct msg_msgseg *next; void *security; /* the actual message follows immediately */ }; @@ -104,9 +34,9 @@ struct msg_queue { /* 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__ */ +extern long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, + int msgflg, + long (*msg_fill)(void __user *, struct msg_msg *, + size_t)); #endif /* _LINUX_MSG_H */ |