4 #include <linux/list.h>
5 #include <uapi/linux/msg.h>
7 /* one msg_msg structure for each message */
9 struct list_head m_list;
11 size_t m_ts; /* message text size */
12 struct msg_msgseg *next;
14 /* the actual message follows immediately */
17 /* one msq_queue structure for each present queue on the system */
19 struct kern_ipc_perm q_perm;
20 time_t q_stime; /* last msgsnd time */
21 time_t q_rtime; /* last msgrcv time */
22 time_t q_ctime; /* last change time */
23 unsigned long q_cbytes; /* current number of bytes on queue */
24 unsigned long q_qnum; /* number of messages in queue */
25 unsigned long q_qbytes; /* max number of bytes on queue */
26 pid_t q_lspid; /* pid of last msgsnd */
27 pid_t q_lrpid; /* last receive pid */
29 struct list_head q_messages;
30 struct list_head q_receivers;
31 struct list_head q_senders;
34 /* Helper routines for sys_msgsnd and sys_msgrcv */
35 extern long do_msgsnd(int msqid, long mtype, void __user *mtext,
36 size_t msgsz, int msgflg);
37 extern long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp,
39 long (*msg_fill)(void __user *, struct msg_msg *,
42 #endif /* _LINUX_MSG_H */