Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_MSG_H |
| 2 | #define _LINUX_MSG_H |
| 3 | |
David Woodhouse | 77597ad | 2006-04-25 14:26:46 +0100 | [diff] [blame] | 4 | #include <linux/list.h> |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 5 | #include <uapi/linux/msg.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | |
| 7 | /* one msg_msg structure for each message */ |
| 8 | struct msg_msg { |
| 9 | struct list_head m_list; |
| 10 | long m_type; |
| 11 | int m_ts; /* message text size */ |
| 12 | struct msg_msgseg* next; |
| 13 | void *security; |
| 14 | /* the actual message follows immediately */ |
| 15 | }; |
| 16 | |
| 17 | /* one msq_queue structure for each present queue on the system */ |
| 18 | struct msg_queue { |
| 19 | struct kern_ipc_perm q_perm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
| 28 | |
| 29 | struct list_head q_messages; |
| 30 | struct list_head q_receivers; |
| 31 | struct list_head q_senders; |
| 32 | }; |
| 33 | |
suzuki | 651971c | 2006-12-06 20:37:48 -0800 | [diff] [blame] | 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); |
Stanislav Kinsbursky | f9dd87f | 2013-01-04 15:34:52 -0800 | [diff] [blame^] | 37 | extern long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, |
| 38 | int msgflg, |
| 39 | long (*msg_fill)(void __user *, struct msg_msg *, size_t)); |
suzuki | 651971c | 2006-12-06 20:37:48 -0800 | [diff] [blame] | 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #endif /* _LINUX_MSG_H */ |