17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5b2eb1770Sudpa * Common Development and Distribution License (the "License"). 6b2eb1770Sudpa * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate /* 22*2c5b6df1Sdv142724 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 237c478bd9Sstevel@tonic-gate * Use is subject to license terms. 247c478bd9Sstevel@tonic-gate */ 257c478bd9Sstevel@tonic-gate 267c478bd9Sstevel@tonic-gate #ifndef _SYS_MSG_IMPL_H 277c478bd9Sstevel@tonic-gate #define _SYS_MSG_IMPL_H 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate #include <sys/ipc_impl.h> 327c478bd9Sstevel@tonic-gate #if defined(_KERNEL) || defined(_KMEMUSER) 337c478bd9Sstevel@tonic-gate #include <sys/msg.h> 347c478bd9Sstevel@tonic-gate #include <sys/t_lock.h> 357c478bd9Sstevel@tonic-gate #include <sys/list.h> 367c478bd9Sstevel@tonic-gate #endif 377c478bd9Sstevel@tonic-gate 387c478bd9Sstevel@tonic-gate #ifdef __cplusplus 397c478bd9Sstevel@tonic-gate extern "C" { 407c478bd9Sstevel@tonic-gate #endif 417c478bd9Sstevel@tonic-gate 427c478bd9Sstevel@tonic-gate /* 437c478bd9Sstevel@tonic-gate * Argument vectors for the various flavors of msgsys(). 447c478bd9Sstevel@tonic-gate */ 457c478bd9Sstevel@tonic-gate 467c478bd9Sstevel@tonic-gate #define MSGGET 0 477c478bd9Sstevel@tonic-gate #define MSGCTL 1 487c478bd9Sstevel@tonic-gate #define MSGRCV 2 497c478bd9Sstevel@tonic-gate #define MSGSND 3 507c478bd9Sstevel@tonic-gate #define MSGIDS 4 517c478bd9Sstevel@tonic-gate #define MSGSNAP 5 527c478bd9Sstevel@tonic-gate 537c478bd9Sstevel@tonic-gate #if defined(_KERNEL) || defined(_KMEMUSER) 547c478bd9Sstevel@tonic-gate 55*2c5b6df1Sdv142724 typedef struct msgq_wakeup { 56*2c5b6df1Sdv142724 list_node_t msgw_list; 57*2c5b6df1Sdv142724 long msgw_type; /* Message type request. */ 58*2c5b6df1Sdv142724 long msgw_snd_wake; /* Type of msg from msgsnd */ 59*2c5b6df1Sdv142724 kthread_t *msgw_thrd; /* Thread waiting */ 60*2c5b6df1Sdv142724 kcondvar_t msgw_wake_cv; /* waiting on this */ 61*2c5b6df1Sdv142724 } msgq_wakeup_t; 62*2c5b6df1Sdv142724 63*2c5b6df1Sdv142724 64*2c5b6df1Sdv142724 typedef struct msg_select { 65*2c5b6df1Sdv142724 msgq_wakeup_t *(*selection)(); 66*2c5b6df1Sdv142724 struct msg_select *next_selection; 67*2c5b6df1Sdv142724 } msg_select_t; 68*2c5b6df1Sdv142724 697c478bd9Sstevel@tonic-gate /* 707c478bd9Sstevel@tonic-gate * There is one msg structure for each message in the system. 717c478bd9Sstevel@tonic-gate */ 727c478bd9Sstevel@tonic-gate struct msg { 737c478bd9Sstevel@tonic-gate list_node_t msg_node; /* message list node */ 747c478bd9Sstevel@tonic-gate long msg_type; /* message type */ 757c478bd9Sstevel@tonic-gate size_t msg_size; /* message text size */ 767c478bd9Sstevel@tonic-gate void *msg_addr; /* message text address */ 777c478bd9Sstevel@tonic-gate long msg_flags; /* message flags */ 787c478bd9Sstevel@tonic-gate long msg_copycnt; /* current # of copyouts on message */ 797c478bd9Sstevel@tonic-gate }; 807c478bd9Sstevel@tonic-gate 817c478bd9Sstevel@tonic-gate /* 827c478bd9Sstevel@tonic-gate * Per message flags 837c478bd9Sstevel@tonic-gate */ 847c478bd9Sstevel@tonic-gate #define MSG_RCVCOPY 00001 /* msgrcv is copying out this message */ 857c478bd9Sstevel@tonic-gate #define MSG_UNLINKED 00002 /* msg has been unlinked from queue */ 867c478bd9Sstevel@tonic-gate 87b2eb1770Sudpa /* 88b2eb1770Sudpa * msg_rcv_cv is now an array of kcondvar_t for performance reason. 89b2eb1770Sudpa * We use multiple condition variables (kcondvar_t) to avoid needing 90b2eb1770Sudpa * to wake all readers when sending a single message. 91b2eb1770Sudpa */ 92*2c5b6df1Sdv142724 93*2c5b6df1Sdv142724 #define MSG_NEG_INTERVAL 8 94*2c5b6df1Sdv142724 #define MSG_MAX_QNUM 64 95*2c5b6df1Sdv142724 #define MSG_MAX_QNUM_CV 65 96b2eb1770Sudpa 977c478bd9Sstevel@tonic-gate typedef struct kmsqid { 987c478bd9Sstevel@tonic-gate kipc_perm_t msg_perm; /* operation permission struct */ 997c478bd9Sstevel@tonic-gate list_t msg_list; /* list of messages on q */ 1007c478bd9Sstevel@tonic-gate msglen_t msg_cbytes; /* current # bytes on q */ 1017c478bd9Sstevel@tonic-gate msgqnum_t msg_qnum; /* # of messages on q */ 1027c478bd9Sstevel@tonic-gate msgqnum_t msg_qmax; /* max # of messages on q */ 1037c478bd9Sstevel@tonic-gate msglen_t msg_qbytes; /* max # of bytes on q */ 1047c478bd9Sstevel@tonic-gate pid_t msg_lspid; /* pid of last msgsnd */ 1057c478bd9Sstevel@tonic-gate pid_t msg_lrpid; /* pid of last msgrcv */ 1067c478bd9Sstevel@tonic-gate time_t msg_stime; /* last msgsnd time */ 1077c478bd9Sstevel@tonic-gate time_t msg_rtime; /* last msgrcv time */ 1087c478bd9Sstevel@tonic-gate time_t msg_ctime; /* last change time */ 109*2c5b6df1Sdv142724 uint_t msg_snd_cnt; /* # of waiting senders */ 110*2c5b6df1Sdv142724 uint_t msg_rcv_cnt; /* # of waiting receivers */ 111*2c5b6df1Sdv142724 uint64_t msg_lowest_type; /* Smallest type on queue */ 112*2c5b6df1Sdv142724 /* 113*2c5b6df1Sdv142724 * linked list of routines used to determine what to wake up next. 114*2c5b6df1Sdv142724 * msg_fnd_sndr: Routines for waking up readers waiting 115*2c5b6df1Sdv142724 * for a message from the sender. 116*2c5b6df1Sdv142724 * msg_fnd_rdr: Routines for waking up readers waiting 117*2c5b6df1Sdv142724 * for a copyout to finish. 118*2c5b6df1Sdv142724 */ 119*2c5b6df1Sdv142724 msg_select_t *msg_fnd_sndr; 120*2c5b6df1Sdv142724 msg_select_t *msg_fnd_rdr; 121*2c5b6df1Sdv142724 /* 122*2c5b6df1Sdv142724 * Various counts and queues for controlling the sleeping 123*2c5b6df1Sdv142724 * and waking up of processes that are waiting for various 124*2c5b6df1Sdv142724 * message queue events. 125*2c5b6df1Sdv142724 * 126*2c5b6df1Sdv142724 * msg_cpy_block: List of receiving threads that are blocked because 127*2c5b6df1Sdv142724 * the message of choice is being copied out. 128*2c5b6df1Sdv142724 * msg_wait_snd: List of receiving threads whose type specifier 129*2c5b6df1Sdv142724 * is positive or 0 but are blocked because there 130*2c5b6df1Sdv142724 * are no matches. 131*2c5b6df1Sdv142724 * msg_wait_snd_ngt: 132*2c5b6df1Sdv142724 * List of receiving threads whose type specifier is 133*2c5b6df1Sdv142724 * negative message type but are blocked because 134*2c5b6df1Sdv142724 * there are no types that qualify. 135*2c5b6df1Sdv142724 */ 1367c478bd9Sstevel@tonic-gate kcondvar_t msg_snd_cv; 137*2c5b6df1Sdv142724 list_t msg_cpy_block; 138*2c5b6df1Sdv142724 list_t msg_wait_snd[MSG_MAX_QNUM_CV]; 139*2c5b6df1Sdv142724 list_t msg_wait_snd_ngt[MSG_MAX_QNUM_CV]; 140*2c5b6df1Sdv142724 int msg_ngt_cnt; /* # of negative receivers blocked */ 141*2c5b6df1Sdv142724 char msg_neg_copy; /* Neg type copy underway */ 1427c478bd9Sstevel@tonic-gate } kmsqid_t; 1437c478bd9Sstevel@tonic-gate 1447c478bd9Sstevel@tonic-gate #endif /* _KERNEL */ 1457c478bd9Sstevel@tonic-gate 1467c478bd9Sstevel@tonic-gate #if defined(_SYSCALL32) 1477c478bd9Sstevel@tonic-gate /* 1487c478bd9Sstevel@tonic-gate * LP64 view of the ILP32 msgbuf structure 1497c478bd9Sstevel@tonic-gate */ 1507c478bd9Sstevel@tonic-gate struct ipcmsgbuf32 { 1517c478bd9Sstevel@tonic-gate int32_t mtype; /* message type */ 1527c478bd9Sstevel@tonic-gate char mtext[1]; /* message text */ 1537c478bd9Sstevel@tonic-gate }; 1547c478bd9Sstevel@tonic-gate 1557c478bd9Sstevel@tonic-gate /* 1567c478bd9Sstevel@tonic-gate * LP64 view of the ILP32 msgsnap_head and msgsnap_mhead structures 1577c478bd9Sstevel@tonic-gate */ 1587c478bd9Sstevel@tonic-gate struct msgsnap_head32 { 1597c478bd9Sstevel@tonic-gate size32_t msgsnap_size; /* bytes consumed/required in the buffer */ 1607c478bd9Sstevel@tonic-gate size32_t msgsnap_nmsg; /* number of messages in the buffer */ 1617c478bd9Sstevel@tonic-gate }; 1627c478bd9Sstevel@tonic-gate 1637c478bd9Sstevel@tonic-gate struct msgsnap_mhead32 { 1647c478bd9Sstevel@tonic-gate size32_t msgsnap_mlen; /* number of bytes in message that follows */ 1657c478bd9Sstevel@tonic-gate int32_t msgsnap_mtype; /* message type */ 1667c478bd9Sstevel@tonic-gate }; 1677c478bd9Sstevel@tonic-gate 1687c478bd9Sstevel@tonic-gate /* 1697c478bd9Sstevel@tonic-gate * LP64 view of the ILP32 msqid_ds structure 1707c478bd9Sstevel@tonic-gate */ 1717c478bd9Sstevel@tonic-gate struct msqid_ds32 { 1727c478bd9Sstevel@tonic-gate struct ipc_perm32 msg_perm; /* operation permission struct */ 1737c478bd9Sstevel@tonic-gate caddr32_t msg_first; /* ptr to first message on q */ 1747c478bd9Sstevel@tonic-gate caddr32_t msg_last; /* ptr to last message on q */ 1757c478bd9Sstevel@tonic-gate uint32_t msg_cbytes; /* current # bytes on q */ 1767c478bd9Sstevel@tonic-gate uint32_t msg_qnum; /* # of messages on q */ 1777c478bd9Sstevel@tonic-gate uint32_t msg_qbytes; /* max # of bytes on q */ 1787c478bd9Sstevel@tonic-gate pid32_t msg_lspid; /* pid of last msgsnd */ 1797c478bd9Sstevel@tonic-gate pid32_t msg_lrpid; /* pid of last msgrcv */ 1807c478bd9Sstevel@tonic-gate time32_t msg_stime; /* last msgsnd time */ 1817c478bd9Sstevel@tonic-gate int32_t msg_pad1; /* reserved for time_t expansion */ 1827c478bd9Sstevel@tonic-gate time32_t msg_rtime; /* last msgrcv time */ 1837c478bd9Sstevel@tonic-gate int32_t msg_pad2; /* time_t expansion */ 1847c478bd9Sstevel@tonic-gate time32_t msg_ctime; /* last change time */ 1857c478bd9Sstevel@tonic-gate int32_t msg_pad3; /* time expansion */ 1867c478bd9Sstevel@tonic-gate int16_t msg_cv; 1877c478bd9Sstevel@tonic-gate int16_t msg_qnum_cv; 1887c478bd9Sstevel@tonic-gate int32_t msg_pad4[3]; /* reserve area */ 1897c478bd9Sstevel@tonic-gate }; 1907c478bd9Sstevel@tonic-gate #endif /* _SYSCALL32 */ 1917c478bd9Sstevel@tonic-gate 1927c478bd9Sstevel@tonic-gate #ifdef __cplusplus 1937c478bd9Sstevel@tonic-gate } 1947c478bd9Sstevel@tonic-gate #endif 1957c478bd9Sstevel@tonic-gate 1967c478bd9Sstevel@tonic-gate #endif /* _SYS_MSG_IMPL_H */ 197