163ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall#ifndef _UAPI_LINUX_MSG_H 263ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall#define _UAPI_LINUX_MSG_H 363ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall 463ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall#include <linux/ipc.h> 563ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall 663ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall/* ipcs ctl commands */ 763ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall#define MSG_STAT 11 863ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall#define MSG_INFO 12 963ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall 1063ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall/* msgrcv options */ 1163ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall#define MSG_NOERROR 010000 /* no error if message is too big */ 1263ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall#define MSG_EXCEPT 020000 /* recv any msg except of specified type.*/ 1363ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall#define MSG_COPY 040000 /* copy (not remove) all queue messages */ 1463ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall 1563ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall/* Obsolete, used only for backwards compatibility and libc5 compiles */ 1663ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hallstruct msqid_ds { 1763ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall struct ipc_perm msg_perm; 1863ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall struct msg *msg_first; /* first message on queue,unused */ 1963ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall struct msg *msg_last; /* last message in queue,unused */ 2063ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall __kernel_time_t msg_stime; /* last msgsnd time */ 2163ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall __kernel_time_t msg_rtime; /* last msgrcv time */ 2263ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall __kernel_time_t msg_ctime; /* last change time */ 2363ed38dc52b27c5b39b11717d0c7736e1756db42Jesse Hall unsigned long msg_lcbytes; /* Reuse junk fields for 32 bit */ 24c0d184b8c1002098138f65e5cd2d9b1fb3da8bb1Jesse Hall unsigned long msg_lqbytes; /* ditto */ 252d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall unsigned short msg_cbytes; /* current number of bytes on queue */ 262d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall unsigned short msg_qnum; /* number of messages in queue */ 272d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall unsigned short msg_qbytes; /* max number of bytes on queue */ 282d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall __kernel_ipc_pid_t msg_lspid; /* pid of last msgsnd */ 292d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall __kernel_ipc_pid_t msg_lrpid; /* last receive pid */ 302d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall}; 312d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall 322d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall/* Include the definition of msqid64_ds */ 332d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#include <asm/msgbuf.h> 342d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall 352d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall/* message buffer for msgsnd and msgrcv calls */ 362d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hallstruct msgbuf { 372d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall __kernel_long_t mtype; /* type of message */ 382d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall char mtext[1]; /* message text */ 392d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall}; 402d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall 412d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall/* buffer for msgctl calls IPC_INFO, MSG_INFO */ 422d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hallstruct msginfo { 432d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall int msgpool; 442d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall int msgmap; 452d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall int msgmax; 462d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall int msgmnb; 472d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall int msgmni; 482d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall int msgssz; 492d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall int msgtql; 502d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall unsigned short msgseg; 512d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall}; 522d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall 532d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall/* 542d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall * Scaling factor to compute msgmni: 552d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall * the memory dedicated to msg queues (msgmni * msgmnb) should occupy 562d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall * at most 1/MSG_MEM_SCALE of the lowmem (see the formula in ipc/msg.c): 572d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall * up to 8MB : msgmni = 16 (MSGMNI) 582d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall * 4 GB : msgmni = 8K 592d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall * more than 16 GB : msgmni = 32K (IPCMNI) 602d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall */ 612d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSG_MEM_SCALE 32 622d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall 632d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSGMNI 16 /* <= IPCMNI */ /* max # of msg queue identifiers */ 642d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSGMAX 8192 /* <= INT_MAX */ /* max size of message (bytes) */ 652d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSGMNB 16384 /* <= INT_MAX */ /* default max size of a message queue */ 662d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall 672d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall/* unused */ 682d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSGPOOL (MSGMNI * MSGMNB / 1024) /* size in kbytes of message pool */ 692d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSGTQL MSGMNB /* number of system message headers */ 702d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSGMAP MSGMNB /* number of entries in message map */ 712d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSGSSZ 16 /* message segment size */ 722d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define __MSGSEG ((MSGPOOL * 1024) / MSGSSZ) /* max no. of segments */ 732d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#define MSGSEG (__MSGSEG <= 0xffff ? __MSGSEG : 0xffff) 742d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall 752d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall 762d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall#endif /* _UAPI_LINUX_MSG_H */ 772d9faafa2318c05f8991beff9cc683d72cbabd07Jesse Hall