2 * Implementation of SVID messages
4 * Author: Daniel Boulet
6 * Copyright 1993 Daniel Boulet and RTMX Inc.
8 * This system call was implemented by Daniel Boulet under contract from RTMX.
10 * Redistribution and use in source forms, with and without modification,
11 * are permitted provided that this entire comment appears intact.
13 * Redistribution in binary form may occur without any restrictions.
14 * Obviously, it would be nice if you gave credit where credit is due
15 * but requiring it would be too onerous.
17 * This software is provided ``AS IS'' without any warranties of any kind.
20 * Copyright (c) 2003-2005 McAfee, Inc.
21 * All rights reserved.
23 * This software was developed for the FreeBSD Project in part by McAfee
24 * Research, the Security Research Division of McAfee, Inc under DARPA/SPAWAR
25 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS research
28 * Redistribution and use in source and binary forms, with or without
29 * modification, are permitted provided that the following conditions
31 * 1. Redistributions of source code must retain the above copyright
32 * notice, this list of conditions and the following disclaimer.
33 * 2. Redistributions in binary form must reproduce the above copyright
34 * notice, this list of conditions and the following disclaimer in the
35 * documentation and/or other materials provided with the distribution.
37 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
40 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 #include <sys/cdefs.h>
51 __FBSDID("$FreeBSD$");
53 #include "opt_compat.h"
54 #include "opt_sysvipc.h"
56 #include <sys/param.h>
57 #include <sys/systm.h>
58 #include <sys/sysproto.h>
59 #include <sys/kernel.h>
63 #include <sys/mutex.h>
64 #include <sys/module.h>
65 #include <sys/mount.h>
67 #include <sys/racct.h>
69 #include <sys/syscall.h>
70 #include <sys/syscallsubr.h>
71 #include <sys/sysent.h>
72 #include <sys/sysctl.h>
73 #include <sys/malloc.h>
76 #include <security/mac/mac_framework.h>
78 FEATURE(sysv_msg, "System V message queues support");
80 static MALLOC_DEFINE(M_MSG, "msg", "SVID compatible message queues");
82 static int msginit(void);
83 static int msgunload(void);
84 static int sysvmsg_modload(struct module *, int, void *);
85 static void msq_remove(struct msqid_kernel *);
86 static struct prison *msg_find_prison(struct ucred *);
87 static int msq_prison_cansee(struct prison *, struct msqid_kernel *);
88 static int msg_prison_check(void *, void *);
89 static int msg_prison_set(void *, void *);
90 static int msg_prison_get(void *, void *);
91 static int msg_prison_remove(void *, void *);
92 static void msg_prison_cleanup(struct prison *);
96 #define DPRINTF(a) printf a
98 #define DPRINTF(a) (void)0
101 static void msg_freehdr(struct msg *msghdr);
104 #define MSGSSZ 8 /* Each segment must be 2^N long */
107 #define MSGSEG 2048 /* must be less than 32767 */
109 #define MSGMAX (MSGSSZ*MSGSEG)
111 #define MSGMNB 2048 /* max # of bytes in a queue */
121 * Based on the configuration parameters described in an SVR2 (yes, two)
122 * config(1m) man page.
124 * Each message is broken up and stored in segments that are msgssz bytes
125 * long. For efficiency reasons, this should be a power of two. Also,
126 * it doesn't make sense if it is less than 8 or greater than about 256.
127 * Consequently, msginit in kern/sysv_msg.c checks that msgssz is a power of
128 * two between 8 and 1024 inclusive (and panic's if it isn't).
130 struct msginfo msginfo = {
131 MSGMAX, /* max chars in a message */
132 MSGMNI, /* # of message queue identifiers */
133 MSGMNB, /* max chars in a queue */
134 MSGTQL, /* max messages in system */
135 MSGSSZ, /* size of a message segment */
136 /* (must be small power of 2 greater than 4) */
137 MSGSEG /* number of message segments */
141 * macros to convert between msqid_ds's and msqid's.
142 * (specific to this implementation)
144 #define MSQID(ix,ds) ((ix) & 0xffff | (((ds).msg_perm.seq << 16) & 0xffff0000))
145 #define MSQID_IX(id) ((id) & 0xffff)
146 #define MSQID_SEQ(id) (((id) >> 16) & 0xffff)
149 * The rest of this file is specific to this particular implementation.
153 short next; /* next segment in buffer */
154 /* -1 -> available */
155 /* 0..(MSGSEG-1) -> index of next segment */
158 #define MSG_LOCKED 01000 /* Is this msqid_ds locked? */
160 static int nfree_msgmaps; /* # of free map entries */
161 static short free_msgmaps; /* head of linked list of free map entries */
162 static struct msg *free_msghdrs;/* list of free msg headers */
163 static char *msgpool; /* MSGMAX byte long msg buffer pool */
164 static struct msgmap *msgmaps; /* MSGSEG msgmap structures */
165 static struct msg *msghdrs; /* MSGTQL msg headers */
166 static struct msqid_kernel *msqids; /* MSGMNI msqid_kernel struct's */
167 static struct mtx msq_mtx; /* global mutex for message queues. */
168 static unsigned msg_prison_slot;/* prison OSD slot */
170 static struct syscall_helper_data msg_syscalls[] = {
171 SYSCALL_INIT_HELPER(msgctl),
172 SYSCALL_INIT_HELPER(msgget),
173 SYSCALL_INIT_HELPER(msgsnd),
174 SYSCALL_INIT_HELPER(msgrcv),
175 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
176 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7)
177 SYSCALL_INIT_HELPER(msgsys),
178 SYSCALL_INIT_HELPER_COMPAT(freebsd7_msgctl),
183 #ifdef COMPAT_FREEBSD32
184 #include <compat/freebsd32/freebsd32.h>
185 #include <compat/freebsd32/freebsd32_ipc.h>
186 #include <compat/freebsd32/freebsd32_proto.h>
187 #include <compat/freebsd32/freebsd32_signal.h>
188 #include <compat/freebsd32/freebsd32_syscall.h>
189 #include <compat/freebsd32/freebsd32_util.h>
191 static struct syscall_helper_data msg32_syscalls[] = {
192 SYSCALL32_INIT_HELPER(freebsd32_msgctl),
193 SYSCALL32_INIT_HELPER(freebsd32_msgsnd),
194 SYSCALL32_INIT_HELPER(freebsd32_msgrcv),
195 SYSCALL32_INIT_HELPER_COMPAT(msgget),
196 SYSCALL32_INIT_HELPER(freebsd32_msgsys),
197 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
198 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7)
199 SYSCALL32_INIT_HELPER(freebsd7_freebsd32_msgctl),
211 osd_method_t methods[PR_MAXMETHOD] = {
212 [PR_METHOD_CHECK] = msg_prison_check,
213 [PR_METHOD_SET] = msg_prison_set,
214 [PR_METHOD_GET] = msg_prison_get,
215 [PR_METHOD_REMOVE] = msg_prison_remove,
218 msginfo.msgmax = msginfo.msgseg * msginfo.msgssz;
219 msgpool = malloc(msginfo.msgmax, M_MSG, M_WAITOK);
220 msgmaps = malloc(sizeof(struct msgmap) * msginfo.msgseg, M_MSG, M_WAITOK);
221 msghdrs = malloc(sizeof(struct msg) * msginfo.msgtql, M_MSG, M_WAITOK);
222 msqids = malloc(sizeof(struct msqid_kernel) * msginfo.msgmni, M_MSG,
226 * msginfo.msgssz should be a power of two for efficiency reasons.
227 * It is also pretty silly if msginfo.msgssz is less than 8
228 * or greater than about 256 so ...
232 while (i < 1024 && i != msginfo.msgssz)
234 if (i != msginfo.msgssz) {
235 DPRINTF(("msginfo.msgssz=%d (0x%x)\n", msginfo.msgssz,
237 panic("msginfo.msgssz not a small power of 2");
240 if (msginfo.msgseg > 32767) {
241 DPRINTF(("msginfo.msgseg=%d\n", msginfo.msgseg));
242 panic("msginfo.msgseg > 32767");
245 for (i = 0; i < msginfo.msgseg; i++) {
247 msgmaps[i-1].next = i;
248 msgmaps[i].next = -1; /* implies entry is available */
251 nfree_msgmaps = msginfo.msgseg;
253 for (i = 0; i < msginfo.msgtql; i++) {
254 msghdrs[i].msg_type = 0;
256 msghdrs[i-1].msg_next = &msghdrs[i];
257 msghdrs[i].msg_next = NULL;
259 mac_sysvmsg_init(&msghdrs[i]);
262 free_msghdrs = &msghdrs[0];
264 for (i = 0; i < msginfo.msgmni; i++) {
265 msqids[i].u.msg_qbytes = 0; /* implies entry is available */
266 msqids[i].u.msg_perm.seq = 0; /* reset to a known value */
267 msqids[i].u.msg_perm.mode = 0;
269 mac_sysvmsq_init(&msqids[i]);
272 mtx_init(&msq_mtx, "msq", NULL, MTX_DEF);
274 /* Set current prisons according to their allow.sysvipc. */
275 msg_prison_slot = osd_jail_register(NULL, methods);
276 rsv = osd_reserve(msg_prison_slot);
277 prison_lock(&prison0);
278 (void)osd_jail_set_reserved(&prison0, msg_prison_slot, rsv, &prison0);
279 prison_unlock(&prison0);
281 sx_slock(&allprison_lock);
282 TAILQ_FOREACH(pr, &allprison, pr_list) {
284 rsv = osd_reserve(msg_prison_slot);
286 if ((pr->pr_allow & PR_ALLOW_SYSVIPC) && pr->pr_ref > 0) {
287 (void)osd_jail_set_reserved(pr, msg_prison_slot, rsv,
294 osd_free_reserved(rsv);
295 sx_sunlock(&allprison_lock);
297 error = syscall_helper_register(msg_syscalls, SY_THR_STATIC_KLD);
300 #ifdef COMPAT_FREEBSD32
301 error = syscall32_helper_register(msg32_syscalls, SY_THR_STATIC_KLD);
311 struct msqid_kernel *msqkptr;
317 syscall_helper_unregister(msg_syscalls);
318 #ifdef COMPAT_FREEBSD32
319 syscall32_helper_unregister(msg32_syscalls);
322 for (msqid = 0; msqid < msginfo.msgmni; msqid++) {
323 msqkptr = &msqids[msqid];
324 if (msqkptr->u.msg_qbytes != 0 ||
325 (msqkptr->u.msg_perm.mode & MSG_LOCKED) != 0)
328 if (msqid != msginfo.msgmni)
331 if (msg_prison_slot != 0)
332 osd_jail_deregister(msg_prison_slot);
334 for (i = 0; i < msginfo.msgtql; i++)
335 mac_sysvmsg_destroy(&msghdrs[i]);
336 for (msqid = 0; msqid < msginfo.msgmni; msqid++)
337 mac_sysvmsq_destroy(&msqids[msqid]);
339 free(msgpool, M_MSG);
340 free(msgmaps, M_MSG);
341 free(msghdrs, M_MSG);
343 mtx_destroy(&msq_mtx);
349 sysvmsg_modload(struct module *module, int cmd, void *arg)
371 static moduledata_t sysvmsg_mod = {
377 DECLARE_MODULE(sysvmsg, sysvmsg_mod, SI_SUB_SYSV_MSG, SI_ORDER_FIRST);
378 MODULE_VERSION(sysvmsg, 1);
384 while (msghdr->msg_ts > 0) {
386 if (msghdr->msg_spot < 0 || msghdr->msg_spot >= msginfo.msgseg)
387 panic("msghdr->msg_spot out of range");
388 next = msgmaps[msghdr->msg_spot].next;
389 msgmaps[msghdr->msg_spot].next = free_msgmaps;
390 free_msgmaps = msghdr->msg_spot;
392 msghdr->msg_spot = next;
393 if (msghdr->msg_ts >= msginfo.msgssz)
394 msghdr->msg_ts -= msginfo.msgssz;
398 if (msghdr->msg_spot != -1)
399 panic("msghdr->msg_spot != -1");
400 msghdr->msg_next = free_msghdrs;
401 free_msghdrs = msghdr;
403 mac_sysvmsg_cleanup(msghdr);
408 msq_remove(struct msqid_kernel *msqkptr)
412 racct_sub_cred(msqkptr->cred, RACCT_NMSGQ, 1);
413 racct_sub_cred(msqkptr->cred, RACCT_MSGQQUEUED, msqkptr->u.msg_qnum);
414 racct_sub_cred(msqkptr->cred, RACCT_MSGQSIZE, msqkptr->u.msg_cbytes);
415 crfree(msqkptr->cred);
416 msqkptr->cred = NULL;
418 /* Free the message headers */
419 msghdr = msqkptr->u.msg_first;
420 while (msghdr != NULL) {
421 struct msg *msghdr_tmp;
423 /* Free the segments of each message */
424 msqkptr->u.msg_cbytes -= msghdr->msg_ts;
425 msqkptr->u.msg_qnum--;
427 msghdr = msghdr->msg_next;
428 msg_freehdr(msghdr_tmp);
431 if (msqkptr->u.msg_cbytes != 0)
432 panic("msg_cbytes is screwed up");
433 if (msqkptr->u.msg_qnum != 0)
434 panic("msg_qnum is screwed up");
436 msqkptr->u.msg_qbytes = 0; /* Mark it as free */
439 mac_sysvmsq_cleanup(msqkptr);
445 static struct prison *
446 msg_find_prison(struct ucred *cred)
448 struct prison *pr, *rpr;
450 pr = cred->cr_prison;
452 rpr = osd_jail_get(pr, msg_prison_slot);
458 msq_prison_cansee(struct prison *rpr, struct msqid_kernel *msqkptr)
461 if (msqkptr->cred == NULL ||
462 !(rpr == msqkptr->cred->cr_prison ||
463 prison_ischild(rpr, msqkptr->cred->cr_prison)))
468 #ifndef _SYS_SYSPROTO_H_
472 struct msqid_ds *buf;
478 register struct msgctl_args *uap;
480 int msqid = uap->msqid;
482 struct msqid_ds msqbuf;
485 DPRINTF(("call to msgctl(%d, %d, %p)\n", msqid, cmd, uap->buf));
486 if (cmd == IPC_SET &&
487 (error = copyin(uap->buf, &msqbuf, sizeof(msqbuf))) != 0)
489 error = kern_msgctl(td, msqid, cmd, &msqbuf);
490 if (cmd == IPC_STAT && error == 0)
491 error = copyout(&msqbuf, uap->buf, sizeof(struct msqid_ds));
496 kern_msgctl(td, msqid, cmd, msqbuf)
500 struct msqid_ds *msqbuf;
502 int rval, error, msqix;
503 register struct msqid_kernel *msqkptr;
506 rpr = msg_find_prison(td->td_ucred);
510 msqix = IPCID_TO_IX(msqid);
512 if (msqix < 0 || msqix >= msginfo.msgmni) {
513 DPRINTF(("msqid (%d) out of range (0<=msqid<%d)\n", msqix,
518 msqkptr = &msqids[msqix];
521 if (msqkptr->u.msg_qbytes == 0) {
522 DPRINTF(("no such msqid\n"));
526 if (msqkptr->u.msg_perm.seq != IPCID_TO_SEQ(msqid)) {
527 DPRINTF(("wrong sequence number\n"));
532 error = msq_prison_cansee(rpr, msqkptr);
534 DPRINTF(("requester can't see prison\n"));
539 error = mac_sysvmsq_check_msqctl(td->td_ucred, msqkptr, cmd);
554 if ((error = ipcperm(td, &msqkptr->u.msg_perm, IPC_M)))
559 * Check that the thread has MAC access permissions to
560 * individual msghdrs. Note: We need to do this in a
561 * separate loop because the actual loop alters the
562 * msq/msghdr info as it progresses, and there is no going
563 * back if half the way through we discover that the
564 * thread cannot free a certain msghdr. The msq will get
565 * into an inconsistent state.
567 for (msghdr = msqkptr->u.msg_first; msghdr != NULL;
568 msghdr = msghdr->msg_next) {
569 error = mac_sysvmsq_check_msgrmid(td->td_ucred, msghdr);
581 if ((error = ipcperm(td, &msqkptr->u.msg_perm, IPC_M)))
583 if (msqbuf->msg_qbytes > msqkptr->u.msg_qbytes) {
584 error = priv_check(td, PRIV_IPC_MSGSIZE);
588 if (msqbuf->msg_qbytes > msginfo.msgmnb) {
589 DPRINTF(("can't increase msg_qbytes beyond %d"
590 "(truncating)\n", msginfo.msgmnb));
591 msqbuf->msg_qbytes = msginfo.msgmnb; /* silently restrict qbytes to system limit */
593 if (msqbuf->msg_qbytes == 0) {
594 DPRINTF(("can't reduce msg_qbytes to 0\n"));
595 error = EINVAL; /* non-standard errno! */
598 msqkptr->u.msg_perm.uid = msqbuf->msg_perm.uid; /* change the owner */
599 msqkptr->u.msg_perm.gid = msqbuf->msg_perm.gid; /* change the owner */
600 msqkptr->u.msg_perm.mode = (msqkptr->u.msg_perm.mode & ~0777) |
601 (msqbuf->msg_perm.mode & 0777);
602 msqkptr->u.msg_qbytes = msqbuf->msg_qbytes;
603 msqkptr->u.msg_ctime = time_second;
607 if ((error = ipcperm(td, &msqkptr->u.msg_perm, IPC_R))) {
608 DPRINTF(("requester doesn't have read access\n"));
611 *msqbuf = msqkptr->u;
612 if (td->td_ucred->cr_prison != msqkptr->cred->cr_prison)
613 msqbuf->msg_perm.key = IPC_PRIVATE;
617 DPRINTF(("invalid command %d\n", cmd));
623 td->td_retval[0] = rval;
625 mtx_unlock(&msq_mtx);
629 #ifndef _SYS_SYSPROTO_H_
639 register struct msgget_args *uap;
641 int msqid, error = 0;
643 int msgflg = uap->msgflg;
644 struct ucred *cred = td->td_ucred;
645 register struct msqid_kernel *msqkptr = NULL;
647 DPRINTF(("msgget(0x%x, 0%o)\n", key, msgflg));
649 if (msg_find_prison(cred) == NULL)
653 if (key != IPC_PRIVATE) {
654 for (msqid = 0; msqid < msginfo.msgmni; msqid++) {
655 msqkptr = &msqids[msqid];
656 if (msqkptr->u.msg_qbytes != 0 &&
657 msqkptr->cred != NULL &&
658 msqkptr->cred->cr_prison == cred->cr_prison &&
659 msqkptr->u.msg_perm.key == key)
662 if (msqid < msginfo.msgmni) {
663 DPRINTF(("found public key\n"));
664 if ((msgflg & IPC_CREAT) && (msgflg & IPC_EXCL)) {
665 DPRINTF(("not exclusive\n"));
669 if ((error = ipcperm(td, &msqkptr->u.msg_perm,
671 DPRINTF(("requester doesn't have 0%o access\n",
676 error = mac_sysvmsq_check_msqget(cred, msqkptr);
684 DPRINTF(("need to allocate the msqid_ds\n"));
685 if (key == IPC_PRIVATE || (msgflg & IPC_CREAT)) {
686 for (msqid = 0; msqid < msginfo.msgmni; msqid++) {
688 * Look for an unallocated and unlocked msqid_ds.
689 * msqid_ds's can be locked by msgsnd or msgrcv while
690 * they are copying the message in/out. We can't
691 * re-use the entry until they release it.
693 msqkptr = &msqids[msqid];
694 if (msqkptr->u.msg_qbytes == 0 &&
695 (msqkptr->u.msg_perm.mode & MSG_LOCKED) == 0)
698 if (msqid == msginfo.msgmni) {
699 DPRINTF(("no more msqid_ds's available\n"));
705 PROC_LOCK(td->td_proc);
706 error = racct_add(td->td_proc, RACCT_NMSGQ, 1);
707 PROC_UNLOCK(td->td_proc);
714 DPRINTF(("msqid %d is available\n", msqid));
715 msqkptr->u.msg_perm.key = key;
716 msqkptr->u.msg_perm.cuid = cred->cr_uid;
717 msqkptr->u.msg_perm.uid = cred->cr_uid;
718 msqkptr->u.msg_perm.cgid = cred->cr_gid;
719 msqkptr->u.msg_perm.gid = cred->cr_gid;
720 msqkptr->u.msg_perm.mode = (msgflg & 0777);
721 msqkptr->cred = crhold(cred);
722 /* Make sure that the returned msqid is unique */
723 msqkptr->u.msg_perm.seq = (msqkptr->u.msg_perm.seq + 1) & 0x7fff;
724 msqkptr->u.msg_first = NULL;
725 msqkptr->u.msg_last = NULL;
726 msqkptr->u.msg_cbytes = 0;
727 msqkptr->u.msg_qnum = 0;
728 msqkptr->u.msg_qbytes = msginfo.msgmnb;
729 msqkptr->u.msg_lspid = 0;
730 msqkptr->u.msg_lrpid = 0;
731 msqkptr->u.msg_stime = 0;
732 msqkptr->u.msg_rtime = 0;
733 msqkptr->u.msg_ctime = time_second;
735 mac_sysvmsq_create(cred, msqkptr);
738 DPRINTF(("didn't find it and wasn't asked to create it\n"));
744 /* Construct the unique msqid */
745 td->td_retval[0] = IXSEQ_TO_IPCID(msqid, msqkptr->u.msg_perm);
747 mtx_unlock(&msq_mtx);
751 #ifndef _SYS_SYSPROTO_H_
760 kern_msgsnd(td, msqid, msgp, msgsz, msgflg, mtype)
763 const void *msgp; /* XXX msgp is actually mtext. */
768 int msqix, segs_needed, error = 0;
769 register struct msqid_kernel *msqkptr;
770 register struct msg *msghdr;
777 rpr = msg_find_prison(td->td_ucred);
782 msqix = IPCID_TO_IX(msqid);
784 if (msqix < 0 || msqix >= msginfo.msgmni) {
785 DPRINTF(("msqid (%d) out of range (0<=msqid<%d)\n", msqix,
791 msqkptr = &msqids[msqix];
792 if (msqkptr->u.msg_qbytes == 0) {
793 DPRINTF(("no such message queue id\n"));
797 if (msqkptr->u.msg_perm.seq != IPCID_TO_SEQ(msqid)) {
798 DPRINTF(("wrong sequence number\n"));
803 if ((error = msq_prison_cansee(rpr, msqkptr))) {
804 DPRINTF(("requester can't see prison\n"));
808 if ((error = ipcperm(td, &msqkptr->u.msg_perm, IPC_W))) {
809 DPRINTF(("requester doesn't have write access\n"));
814 error = mac_sysvmsq_check_msqsnd(td->td_ucred, msqkptr);
821 PROC_LOCK(td->td_proc);
822 if (racct_add(td->td_proc, RACCT_MSGQQUEUED, 1)) {
823 PROC_UNLOCK(td->td_proc);
828 if (racct_add(td->td_proc, RACCT_MSGQSIZE, msgsz)) {
829 racct_sub(td->td_proc, RACCT_MSGQQUEUED, 1);
830 PROC_UNLOCK(td->td_proc);
834 PROC_UNLOCK(td->td_proc);
838 segs_needed = howmany(msgsz, msginfo.msgssz);
839 DPRINTF(("msgsz=%zu, msgssz=%d, segs_needed=%d\n", msgsz,
840 msginfo.msgssz, segs_needed));
842 int need_more_resources = 0;
846 * (inside this loop in case msg_qbytes changes while we sleep)
849 if (msgsz > msqkptr->u.msg_qbytes) {
850 DPRINTF(("msgsz > msqkptr->u.msg_qbytes\n"));
855 if (msqkptr->u.msg_perm.mode & MSG_LOCKED) {
856 DPRINTF(("msqid is locked\n"));
857 need_more_resources = 1;
859 if (msgsz + msqkptr->u.msg_cbytes > msqkptr->u.msg_qbytes) {
860 DPRINTF(("msgsz + msg_cbytes > msg_qbytes\n"));
861 need_more_resources = 1;
863 if (segs_needed > nfree_msgmaps) {
864 DPRINTF(("segs_needed > nfree_msgmaps\n"));
865 need_more_resources = 1;
867 if (free_msghdrs == NULL) {
868 DPRINTF(("no more msghdrs\n"));
869 need_more_resources = 1;
872 if (need_more_resources) {
875 if ((msgflg & IPC_NOWAIT) != 0) {
876 DPRINTF(("need more resources but caller "
877 "doesn't want to wait\n"));
882 if ((msqkptr->u.msg_perm.mode & MSG_LOCKED) != 0) {
883 DPRINTF(("we don't own the msqid_ds\n"));
886 /* Force later arrivals to wait for our
888 DPRINTF(("we own the msqid_ds\n"));
889 msqkptr->u.msg_perm.mode |= MSG_LOCKED;
892 DPRINTF(("msgsnd: goodnight\n"));
893 error = msleep(msqkptr, &msq_mtx, (PZERO - 4) | PCATCH,
895 DPRINTF(("msgsnd: good morning, error=%d\n", error));
897 msqkptr->u.msg_perm.mode &= ~MSG_LOCKED;
898 if (error == EWOULDBLOCK) {
899 DPRINTF(("msgsnd: timed out\n"));
903 DPRINTF(("msgsnd: interrupted system call\n"));
909 * Make sure that the msq queue still exists
912 if (msqkptr->u.msg_qbytes == 0) {
913 DPRINTF(("msqid deleted\n"));
919 DPRINTF(("got all the resources that we need\n"));
925 * We have the resources that we need.
929 if (msqkptr->u.msg_perm.mode & MSG_LOCKED)
930 panic("msg_perm.mode & MSG_LOCKED");
931 if (segs_needed > nfree_msgmaps)
932 panic("segs_needed > nfree_msgmaps");
933 if (msgsz + msqkptr->u.msg_cbytes > msqkptr->u.msg_qbytes)
934 panic("msgsz + msg_cbytes > msg_qbytes");
935 if (free_msghdrs == NULL)
936 panic("no more msghdrs");
939 * Re-lock the msqid_ds in case we page-fault when copying in the
943 if ((msqkptr->u.msg_perm.mode & MSG_LOCKED) != 0)
944 panic("msqid_ds is already locked");
945 msqkptr->u.msg_perm.mode |= MSG_LOCKED;
948 * Allocate a message header
951 msghdr = free_msghdrs;
952 free_msghdrs = msghdr->msg_next;
953 msghdr->msg_spot = -1;
954 msghdr->msg_ts = msgsz;
955 msghdr->msg_type = mtype;
958 * XXXMAC: Should the mac_sysvmsq_check_msgmsq check follow here
959 * immediately? Or, should it be checked just before the msg is
960 * enqueued in the msgq (as it is done now)?
962 mac_sysvmsg_create(td->td_ucred, msqkptr, msghdr);
966 * Allocate space for the message
969 while (segs_needed > 0) {
970 if (nfree_msgmaps <= 0)
971 panic("not enough msgmaps");
972 if (free_msgmaps == -1)
973 panic("nil free_msgmaps");
976 panic("next too low #1");
977 if (next >= msginfo.msgseg)
978 panic("next out of range #1");
979 DPRINTF(("allocating segment %d to message\n", next));
980 free_msgmaps = msgmaps[next].next;
982 msgmaps[next].next = msghdr->msg_spot;
983 msghdr->msg_spot = next;
988 * Validate the message type
991 if (msghdr->msg_type < 1) {
993 msqkptr->u.msg_perm.mode &= ~MSG_LOCKED;
995 DPRINTF(("mtype (%ld) < 1\n", msghdr->msg_type));
1001 * Copy in the message body
1004 next = msghdr->msg_spot;
1007 if (msgsz > msginfo.msgssz)
1008 tlen = msginfo.msgssz;
1012 panic("next too low #2");
1013 if (next >= msginfo.msgseg)
1014 panic("next out of range #2");
1015 mtx_unlock(&msq_mtx);
1016 if ((error = copyin(msgp, &msgpool[next * msginfo.msgssz],
1019 DPRINTF(("error %d copying in message segment\n",
1021 msg_freehdr(msghdr);
1022 msqkptr->u.msg_perm.mode &= ~MSG_LOCKED;
1028 msgp = (const char *)msgp + tlen;
1029 next = msgmaps[next].next;
1032 panic("didn't use all the msg segments");
1035 * We've got the message. Unlock the msqid_ds.
1038 msqkptr->u.msg_perm.mode &= ~MSG_LOCKED;
1041 * Make sure that the msqid_ds is still allocated.
1044 if (msqkptr->u.msg_qbytes == 0) {
1045 msg_freehdr(msghdr);
1053 * Note: Since the task/thread allocates the msghdr and usually
1054 * primes it with its own MAC label, for a majority of policies, it
1055 * won't be necessary to check whether the msghdr has access
1056 * permissions to the msgq. The mac_sysvmsq_check_msqsnd check would
1057 * suffice in that case. However, this hook may be required where
1058 * individual policies derive a non-identical label for the msghdr
1059 * from the current thread label and may want to check the msghdr
1060 * enqueue permissions, along with read/write permissions to the
1063 error = mac_sysvmsq_check_msgmsq(td->td_ucred, msghdr, msqkptr);
1065 msg_freehdr(msghdr);
1072 * Put the message into the queue
1074 if (msqkptr->u.msg_first == NULL) {
1075 msqkptr->u.msg_first = msghdr;
1076 msqkptr->u.msg_last = msghdr;
1078 msqkptr->u.msg_last->msg_next = msghdr;
1079 msqkptr->u.msg_last = msghdr;
1081 msqkptr->u.msg_last->msg_next = NULL;
1083 msqkptr->u.msg_cbytes += msghdr->msg_ts;
1084 msqkptr->u.msg_qnum++;
1085 msqkptr->u.msg_lspid = td->td_proc->p_pid;
1086 msqkptr->u.msg_stime = time_second;
1089 td->td_retval[0] = 0;
1092 if (racct_enable && error != 0) {
1093 PROC_LOCK(td->td_proc);
1094 racct_sub(td->td_proc, RACCT_MSGQQUEUED, 1);
1095 racct_sub(td->td_proc, RACCT_MSGQSIZE, saved_msgsz);
1096 PROC_UNLOCK(td->td_proc);
1100 mtx_unlock(&msq_mtx);
1107 register struct msgsnd_args *uap;
1112 DPRINTF(("call to msgsnd(%d, %p, %zu, %d)\n", uap->msqid, uap->msgp,
1113 uap->msgsz, uap->msgflg));
1115 if ((error = copyin(uap->msgp, &mtype, sizeof(mtype))) != 0) {
1116 DPRINTF(("error %d copying the message type\n", error));
1119 return (kern_msgsnd(td, uap->msqid,
1120 (const char *)uap->msgp + sizeof(mtype),
1121 uap->msgsz, uap->msgflg, mtype));
1124 #ifndef _SYS_SYSPROTO_H_
1125 struct msgrcv_args {
1134 kern_msgrcv(td, msqid, msgp, msgsz, msgtyp, msgflg, mtype)
1137 void *msgp; /* XXX msgp is actually mtext. */
1144 register struct msqid_kernel *msqkptr;
1145 register struct msg *msghdr;
1147 int msqix, error = 0;
1150 rpr = msg_find_prison(td->td_ucred);
1154 msqix = IPCID_TO_IX(msqid);
1156 if (msqix < 0 || msqix >= msginfo.msgmni) {
1157 DPRINTF(("msqid (%d) out of range (0<=msqid<%d)\n", msqix,
1162 msqkptr = &msqids[msqix];
1164 if (msqkptr->u.msg_qbytes == 0) {
1165 DPRINTF(("no such message queue id\n"));
1169 if (msqkptr->u.msg_perm.seq != IPCID_TO_SEQ(msqid)) {
1170 DPRINTF(("wrong sequence number\n"));
1175 if ((error = msq_prison_cansee(rpr, msqkptr))) {
1176 DPRINTF(("requester can't see prison\n"));
1180 if ((error = ipcperm(td, &msqkptr->u.msg_perm, IPC_R))) {
1181 DPRINTF(("requester doesn't have read access\n"));
1186 error = mac_sysvmsq_check_msqrcv(td->td_ucred, msqkptr);
1192 while (msghdr == NULL) {
1194 msghdr = msqkptr->u.msg_first;
1195 if (msghdr != NULL) {
1196 if (msgsz < msghdr->msg_ts &&
1197 (msgflg & MSG_NOERROR) == 0) {
1198 DPRINTF(("first message on the queue "
1199 "is too big (want %zu, got %d)\n",
1200 msgsz, msghdr->msg_ts));
1205 error = mac_sysvmsq_check_msgrcv(td->td_ucred,
1210 if (msqkptr->u.msg_first == msqkptr->u.msg_last) {
1211 msqkptr->u.msg_first = NULL;
1212 msqkptr->u.msg_last = NULL;
1214 msqkptr->u.msg_first = msghdr->msg_next;
1215 if (msqkptr->u.msg_first == NULL)
1216 panic("msg_first/last screwed up #1");
1220 struct msg *previous;
1224 prev = &(msqkptr->u.msg_first);
1225 while ((msghdr = *prev) != NULL) {
1227 * Is this message's type an exact match or is
1228 * this message's type less than or equal to
1229 * the absolute value of a negative msgtyp?
1230 * Note that the second half of this test can
1231 * NEVER be true if msgtyp is positive since
1232 * msg_type is always positive!
1235 if (msgtyp == msghdr->msg_type ||
1236 msghdr->msg_type <= -msgtyp) {
1237 DPRINTF(("found message type %ld, "
1239 msghdr->msg_type, msgtyp));
1240 if (msgsz < msghdr->msg_ts &&
1241 (msgflg & MSG_NOERROR) == 0) {
1242 DPRINTF(("requested message "
1243 "on the queue is too big "
1244 "(want %zu, got %hu)\n",
1245 msgsz, msghdr->msg_ts));
1250 error = mac_sysvmsq_check_msgrcv(
1251 td->td_ucred, msghdr);
1255 *prev = msghdr->msg_next;
1256 if (msghdr == msqkptr->u.msg_last) {
1257 if (previous == NULL) {
1259 &msqkptr->u.msg_first)
1260 panic("msg_first/last screwed up #2");
1261 msqkptr->u.msg_first =
1263 msqkptr->u.msg_last =
1267 &msqkptr->u.msg_first)
1268 panic("msg_first/last screwed up #3");
1269 msqkptr->u.msg_last =
1276 prev = &(msghdr->msg_next);
1281 * We've either extracted the msghdr for the appropriate
1282 * message or there isn't one.
1283 * If there is one then bail out of this loop.
1290 * Hmph! No message found. Does the user want to wait?
1293 if ((msgflg & IPC_NOWAIT) != 0) {
1294 DPRINTF(("no appropriate message found (msgtyp=%ld)\n",
1296 /* The SVID says to return ENOMSG. */
1302 * Wait for something to happen
1305 DPRINTF(("msgrcv: goodnight\n"));
1306 error = msleep(msqkptr, &msq_mtx, (PZERO - 4) | PCATCH,
1308 DPRINTF(("msgrcv: good morning (error=%d)\n", error));
1311 DPRINTF(("msgrcv: interrupted system call\n"));
1317 * Make sure that the msq queue still exists
1320 if (msqkptr->u.msg_qbytes == 0 ||
1321 msqkptr->u.msg_perm.seq != IPCID_TO_SEQ(msqid)) {
1322 DPRINTF(("msqid deleted\n"));
1329 * Return the message to the user.
1331 * First, do the bookkeeping (before we risk being interrupted).
1334 msqkptr->u.msg_cbytes -= msghdr->msg_ts;
1335 msqkptr->u.msg_qnum--;
1336 msqkptr->u.msg_lrpid = td->td_proc->p_pid;
1337 msqkptr->u.msg_rtime = time_second;
1339 racct_sub_cred(msqkptr->cred, RACCT_MSGQQUEUED, 1);
1340 racct_sub_cred(msqkptr->cred, RACCT_MSGQSIZE, msghdr->msg_ts);
1343 * Make msgsz the actual amount that we'll be returning.
1344 * Note that this effectively truncates the message if it is too long
1345 * (since msgsz is never increased).
1348 DPRINTF(("found a message, msgsz=%zu, msg_ts=%hu\n", msgsz,
1350 if (msgsz > msghdr->msg_ts)
1351 msgsz = msghdr->msg_ts;
1352 *mtype = msghdr->msg_type;
1355 * Return the segments to the user
1358 next = msghdr->msg_spot;
1359 for (len = 0; len < msgsz; len += msginfo.msgssz) {
1362 if (msgsz - len > msginfo.msgssz)
1363 tlen = msginfo.msgssz;
1367 panic("next too low #3");
1368 if (next >= msginfo.msgseg)
1369 panic("next out of range #3");
1370 mtx_unlock(&msq_mtx);
1371 error = copyout(&msgpool[next * msginfo.msgssz], msgp, tlen);
1374 DPRINTF(("error (%d) copying out message segment\n",
1376 msg_freehdr(msghdr);
1380 msgp = (char *)msgp + tlen;
1381 next = msgmaps[next].next;
1385 * Done, return the actual number of bytes copied out.
1388 msg_freehdr(msghdr);
1390 td->td_retval[0] = msgsz;
1392 mtx_unlock(&msq_mtx);
1399 register struct msgrcv_args *uap;
1404 DPRINTF(("call to msgrcv(%d, %p, %zu, %ld, %d)\n", uap->msqid,
1405 uap->msgp, uap->msgsz, uap->msgtyp, uap->msgflg));
1407 if ((error = kern_msgrcv(td, uap->msqid,
1408 (char *)uap->msgp + sizeof(mtype), uap->msgsz,
1409 uap->msgtyp, uap->msgflg, &mtype)) != 0)
1411 if ((error = copyout(&mtype, uap->msgp, sizeof(mtype))) != 0)
1412 DPRINTF(("error %d copying the message type\n", error));
1417 sysctl_msqids(SYSCTL_HANDLER_ARGS)
1419 struct msqid_kernel tmsqk;
1420 struct prison *pr, *rpr;
1423 pr = req->td->td_ucred->cr_prison;
1424 rpr = msg_find_prison(req->td->td_ucred);
1426 for (i = 0; i < msginfo.msgmni; i++) {
1428 if (msqids[i].u.msg_qbytes == 0 || rpr == NULL ||
1429 msq_prison_cansee(rpr, &msqids[i]) != 0)
1430 bzero(&tmsqk, sizeof(tmsqk));
1433 if (tmsqk.cred->cr_prison != pr)
1434 tmsqk.u.msg_perm.key = IPC_PRIVATE;
1436 mtx_unlock(&msq_mtx);
1437 error = SYSCTL_OUT(req, &tmsqk, sizeof(tmsqk));
1444 SYSCTL_INT(_kern_ipc, OID_AUTO, msgmax, CTLFLAG_RD, &msginfo.msgmax, 0,
1445 "Maximum message size");
1446 SYSCTL_INT(_kern_ipc, OID_AUTO, msgmni, CTLFLAG_RDTUN, &msginfo.msgmni, 0,
1447 "Number of message queue identifiers");
1448 SYSCTL_INT(_kern_ipc, OID_AUTO, msgmnb, CTLFLAG_RDTUN, &msginfo.msgmnb, 0,
1449 "Maximum number of bytes in a queue");
1450 SYSCTL_INT(_kern_ipc, OID_AUTO, msgtql, CTLFLAG_RDTUN, &msginfo.msgtql, 0,
1451 "Maximum number of messages in the system");
1452 SYSCTL_INT(_kern_ipc, OID_AUTO, msgssz, CTLFLAG_RDTUN, &msginfo.msgssz, 0,
1453 "Size of a message segment");
1454 SYSCTL_INT(_kern_ipc, OID_AUTO, msgseg, CTLFLAG_RDTUN, &msginfo.msgseg, 0,
1455 "Number of message segments");
1456 SYSCTL_PROC(_kern_ipc, OID_AUTO, msqids,
1457 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE,
1458 NULL, 0, sysctl_msqids, "", "Message queue IDs");
1461 msg_prison_check(void *obj, void *data)
1463 struct prison *pr = obj;
1464 struct prison *prpr;
1465 struct vfsoptlist *opts = data;
1469 * sysvmsg is a jailsys integer.
1470 * It must be "disable" if the parent jail is disabled.
1472 error = vfs_copyopt(opts, "sysvmsg", &jsys, sizeof(jsys));
1473 if (error != ENOENT) {
1477 case JAIL_SYS_DISABLE:
1480 case JAIL_SYS_INHERIT:
1481 prison_lock(pr->pr_parent);
1482 prpr = osd_jail_get(pr->pr_parent, msg_prison_slot);
1483 prison_unlock(pr->pr_parent);
1496 msg_prison_set(void *obj, void *data)
1498 struct prison *pr = obj;
1499 struct prison *tpr, *orpr, *nrpr, *trpr;
1500 struct vfsoptlist *opts = data;
1505 * sysvmsg controls which jail is the root of the associated msgs (this
1506 * jail or same as the parent), or if the feature is available at all.
1508 if (vfs_copyopt(opts, "sysvmsg", &jsys, sizeof(jsys)) == ENOENT)
1509 jsys = vfs_flagopt(opts, "allow.sysvipc", NULL, 0)
1511 : vfs_flagopt(opts, "allow.nosysvipc", NULL, 0)
1514 if (jsys == JAIL_SYS_DISABLE) {
1516 orpr = osd_jail_get(pr, msg_prison_slot);
1518 osd_jail_del(pr, msg_prison_slot);
1522 msg_prison_cleanup(pr);
1523 /* Disable all child jails as well. */
1524 FOREACH_PRISON_DESCENDANT(pr, tpr, descend) {
1526 trpr = osd_jail_get(tpr, msg_prison_slot);
1528 osd_jail_del(tpr, msg_prison_slot);
1531 msg_prison_cleanup(tpr);
1538 } else if (jsys != -1) {
1539 if (jsys == JAIL_SYS_NEW)
1542 prison_lock(pr->pr_parent);
1543 nrpr = osd_jail_get(pr->pr_parent, msg_prison_slot);
1544 prison_unlock(pr->pr_parent);
1546 rsv = osd_reserve(msg_prison_slot);
1548 orpr = osd_jail_get(pr, msg_prison_slot);
1550 (void)osd_jail_set_reserved(pr, msg_prison_slot, rsv,
1553 osd_free_reserved(rsv);
1557 msg_prison_cleanup(pr);
1559 /* Change child jails matching the old root, */
1560 FOREACH_PRISON_DESCENDANT(pr, tpr, descend) {
1562 trpr = osd_jail_get(tpr,
1565 (void)osd_jail_set(tpr,
1566 msg_prison_slot, nrpr);
1569 msg_prison_cleanup(tpr);
1583 msg_prison_get(void *obj, void *data)
1585 struct prison *pr = obj;
1587 struct vfsoptlist *opts = data;
1590 /* Set sysvmsg based on the jail's root prison. */
1592 rpr = osd_jail_get(pr, msg_prison_slot);
1594 jsys = rpr == NULL ? JAIL_SYS_DISABLE
1595 : rpr == pr ? JAIL_SYS_NEW : JAIL_SYS_INHERIT;
1596 error = vfs_setopt(opts, "sysvmsg", &jsys, sizeof(jsys));
1597 if (error == ENOENT)
1603 msg_prison_remove(void *obj, void *data __unused)
1605 struct prison *pr = obj;
1609 rpr = osd_jail_get(pr, msg_prison_slot);
1612 msg_prison_cleanup(pr);
1617 msg_prison_cleanup(struct prison *pr)
1619 struct msqid_kernel *msqkptr;
1622 /* Remove any msqs that belong to this jail. */
1624 for (i = 0; i < msginfo.msgmni; i++) {
1625 msqkptr = &msqids[i];
1626 if (msqkptr->u.msg_qbytes != 0 &&
1627 msqkptr->cred != NULL && msqkptr->cred->cr_prison == pr)
1628 msq_remove(msqkptr);
1630 mtx_unlock(&msq_mtx);
1633 SYSCTL_JAIL_PARAM_SYS_NODE(sysvmsg, CTLFLAG_RW, "SYSV message queues");
1635 #ifdef COMPAT_FREEBSD32
1637 freebsd32_msgsys(struct thread *td, struct freebsd32_msgsys_args *uap)
1640 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
1641 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7)
1642 switch (uap->which) {
1644 return (freebsd7_freebsd32_msgctl(td,
1645 (struct freebsd7_freebsd32_msgctl_args *)&uap->a2));
1647 return (freebsd32_msgsnd(td,
1648 (struct freebsd32_msgsnd_args *)&uap->a2));
1650 return (freebsd32_msgrcv(td,
1651 (struct freebsd32_msgrcv_args *)&uap->a2));
1653 return (sys_msgsys(td, (struct msgsys_args *)uap));
1656 return (nosys(td, NULL));
1660 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
1661 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7)
1663 freebsd7_freebsd32_msgctl(struct thread *td,
1664 struct freebsd7_freebsd32_msgctl_args *uap)
1666 struct msqid_ds msqbuf;
1667 struct msqid_ds32_old msqbuf32;
1670 if (uap->cmd == IPC_SET) {
1671 error = copyin(uap->buf, &msqbuf32, sizeof(msqbuf32));
1674 freebsd32_ipcperm_old_in(&msqbuf32.msg_perm, &msqbuf.msg_perm);
1675 PTRIN_CP(msqbuf32, msqbuf, msg_first);
1676 PTRIN_CP(msqbuf32, msqbuf, msg_last);
1677 CP(msqbuf32, msqbuf, msg_cbytes);
1678 CP(msqbuf32, msqbuf, msg_qnum);
1679 CP(msqbuf32, msqbuf, msg_qbytes);
1680 CP(msqbuf32, msqbuf, msg_lspid);
1681 CP(msqbuf32, msqbuf, msg_lrpid);
1682 CP(msqbuf32, msqbuf, msg_stime);
1683 CP(msqbuf32, msqbuf, msg_rtime);
1684 CP(msqbuf32, msqbuf, msg_ctime);
1686 error = kern_msgctl(td, uap->msqid, uap->cmd, &msqbuf);
1689 if (uap->cmd == IPC_STAT) {
1690 bzero(&msqbuf32, sizeof(msqbuf32));
1691 freebsd32_ipcperm_old_out(&msqbuf.msg_perm, &msqbuf32.msg_perm);
1692 PTROUT_CP(msqbuf, msqbuf32, msg_first);
1693 PTROUT_CP(msqbuf, msqbuf32, msg_last);
1694 CP(msqbuf, msqbuf32, msg_cbytes);
1695 CP(msqbuf, msqbuf32, msg_qnum);
1696 CP(msqbuf, msqbuf32, msg_qbytes);
1697 CP(msqbuf, msqbuf32, msg_lspid);
1698 CP(msqbuf, msqbuf32, msg_lrpid);
1699 CP(msqbuf, msqbuf32, msg_stime);
1700 CP(msqbuf, msqbuf32, msg_rtime);
1701 CP(msqbuf, msqbuf32, msg_ctime);
1702 error = copyout(&msqbuf32, uap->buf, sizeof(struct msqid_ds32));
1709 freebsd32_msgctl(struct thread *td, struct freebsd32_msgctl_args *uap)
1711 struct msqid_ds msqbuf;
1712 struct msqid_ds32 msqbuf32;
1715 if (uap->cmd == IPC_SET) {
1716 error = copyin(uap->buf, &msqbuf32, sizeof(msqbuf32));
1719 freebsd32_ipcperm_in(&msqbuf32.msg_perm, &msqbuf.msg_perm);
1720 PTRIN_CP(msqbuf32, msqbuf, msg_first);
1721 PTRIN_CP(msqbuf32, msqbuf, msg_last);
1722 CP(msqbuf32, msqbuf, msg_cbytes);
1723 CP(msqbuf32, msqbuf, msg_qnum);
1724 CP(msqbuf32, msqbuf, msg_qbytes);
1725 CP(msqbuf32, msqbuf, msg_lspid);
1726 CP(msqbuf32, msqbuf, msg_lrpid);
1727 CP(msqbuf32, msqbuf, msg_stime);
1728 CP(msqbuf32, msqbuf, msg_rtime);
1729 CP(msqbuf32, msqbuf, msg_ctime);
1731 error = kern_msgctl(td, uap->msqid, uap->cmd, &msqbuf);
1734 if (uap->cmd == IPC_STAT) {
1735 freebsd32_ipcperm_out(&msqbuf.msg_perm, &msqbuf32.msg_perm);
1736 PTROUT_CP(msqbuf, msqbuf32, msg_first);
1737 PTROUT_CP(msqbuf, msqbuf32, msg_last);
1738 CP(msqbuf, msqbuf32, msg_cbytes);
1739 CP(msqbuf, msqbuf32, msg_qnum);
1740 CP(msqbuf, msqbuf32, msg_qbytes);
1741 CP(msqbuf, msqbuf32, msg_lspid);
1742 CP(msqbuf, msqbuf32, msg_lrpid);
1743 CP(msqbuf, msqbuf32, msg_stime);
1744 CP(msqbuf, msqbuf32, msg_rtime);
1745 CP(msqbuf, msqbuf32, msg_ctime);
1746 error = copyout(&msqbuf32, uap->buf, sizeof(struct msqid_ds32));
1752 freebsd32_msgsnd(struct thread *td, struct freebsd32_msgsnd_args *uap)
1759 msgp = PTRIN(uap->msgp);
1760 if ((error = copyin(msgp, &mtype32, sizeof(mtype32))) != 0)
1763 return (kern_msgsnd(td, uap->msqid,
1764 (const char *)msgp + sizeof(mtype32),
1765 uap->msgsz, uap->msgflg, mtype));
1769 freebsd32_msgrcv(struct thread *td, struct freebsd32_msgrcv_args *uap)
1776 msgp = PTRIN(uap->msgp);
1777 if ((error = kern_msgrcv(td, uap->msqid,
1778 (char *)msgp + sizeof(mtype32), uap->msgsz,
1779 uap->msgtyp, uap->msgflg, &mtype)) != 0)
1781 mtype32 = (int32_t)mtype;
1782 return (copyout(&mtype32, msgp, sizeof(mtype32)));
1786 #if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
1787 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7)
1789 /* XXX casting to (sy_call_t *) is bogus, as usual. */
1790 static sy_call_t *msgcalls[] = {
1791 (sy_call_t *)freebsd7_msgctl, (sy_call_t *)sys_msgget,
1792 (sy_call_t *)sys_msgsnd, (sy_call_t *)sys_msgrcv
1796 * Entry point for all MSG calls.
1801 /* XXX actually varargs. */
1802 struct msgsys_args /* {
1813 if (uap->which < 0 || uap->which >= nitems(msgcalls))
1815 error = (*msgcalls[uap->which])(td, &uap->a2);
1820 #define CP(src, dst, fld) do { (dst).fld = (src).fld; } while (0)
1823 #ifndef _SYS_SYSPROTO_H_
1824 struct freebsd7_msgctl_args {
1827 struct msqid_ds_old *buf;
1831 freebsd7_msgctl(td, uap)
1833 struct freebsd7_msgctl_args *uap;
1835 struct msqid_ds_old msqold;
1836 struct msqid_ds msqbuf;
1839 DPRINTF(("call to freebsd7_msgctl(%d, %d, %p)\n", uap->msqid, uap->cmd,
1841 if (uap->cmd == IPC_SET) {
1842 error = copyin(uap->buf, &msqold, sizeof(msqold));
1845 ipcperm_old2new(&msqold.msg_perm, &msqbuf.msg_perm);
1846 CP(msqold, msqbuf, msg_first);
1847 CP(msqold, msqbuf, msg_last);
1848 CP(msqold, msqbuf, msg_cbytes);
1849 CP(msqold, msqbuf, msg_qnum);
1850 CP(msqold, msqbuf, msg_qbytes);
1851 CP(msqold, msqbuf, msg_lspid);
1852 CP(msqold, msqbuf, msg_lrpid);
1853 CP(msqold, msqbuf, msg_stime);
1854 CP(msqold, msqbuf, msg_rtime);
1855 CP(msqold, msqbuf, msg_ctime);
1857 error = kern_msgctl(td, uap->msqid, uap->cmd, &msqbuf);
1860 if (uap->cmd == IPC_STAT) {
1861 bzero(&msqold, sizeof(msqold));
1862 ipcperm_new2old(&msqbuf.msg_perm, &msqold.msg_perm);
1863 CP(msqbuf, msqold, msg_first);
1864 CP(msqbuf, msqold, msg_last);
1865 CP(msqbuf, msqold, msg_cbytes);
1866 CP(msqbuf, msqold, msg_qnum);
1867 CP(msqbuf, msqold, msg_qbytes);
1868 CP(msqbuf, msqold, msg_lspid);
1869 CP(msqbuf, msqold, msg_lrpid);
1870 CP(msqbuf, msqold, msg_stime);
1871 CP(msqbuf, msqold, msg_rtime);
1872 CP(msqbuf, msqold, msg_ctime);
1873 error = copyout(&msqold, uap->buf, sizeof(struct msqid_ds_old));
1880 #endif /* COMPAT_FREEBSD4 || COMPAT_FREEBSD5 || COMPAT_FREEBSD6 ||