2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
5 * Copyright (c) 2016-2017 Robert N. M. Watson
8 * Portions of this software were developed by BAE Systems, the University of
9 * Cambridge Computer Laboratory, and Memorial University under DARPA/AFRL
10 * contract FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent
11 * Computing (TC) research program.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * POSIX message queue implementation.
39 * 1) A mqueue filesystem can be mounted, each message queue appears
40 * in mounted directory, user can change queue's permission and
41 * ownership, or remove a queue. Manually creating a file in the
42 * directory causes a message queue to be created in the kernel with
43 * default message queue attributes applied and same name used, this
44 * method is not advocated since mq_open syscall allows user to specify
45 * different attributes. Also the file system can be mounted multiple
46 * times at different mount points but shows same contents.
48 * 2) Standard POSIX message queue API. The syscalls do not use vfs layer,
49 * but directly operate on internal data structure, this allows user to
50 * use the IPC facility without having to mount mqueue file system.
53 #include <sys/cdefs.h>
54 #include "opt_capsicum.h"
56 #include <sys/param.h>
57 #include <sys/kernel.h>
58 #include <sys/systm.h>
59 #include <sys/limits.h>
60 #include <sys/malloc.h>
62 #include <sys/capsicum.h>
63 #include <sys/dirent.h>
64 #include <sys/event.h>
65 #include <sys/eventhandler.h>
66 #include <sys/fcntl.h>
68 #include <sys/filedesc.h>
71 #include <sys/module.h>
72 #include <sys/mount.h>
73 #include <sys/mqueue.h>
74 #include <sys/mutex.h>
75 #include <sys/namei.h>
76 #include <sys/posix4.h>
80 #include <sys/queue.h>
81 #include <sys/sysproto.h>
83 #include <sys/syscall.h>
84 #include <sys/syscallsubr.h>
85 #include <sys/sysent.h>
87 #include <sys/sysctl.h>
88 #include <sys/taskqueue.h>
89 #include <sys/unistd.h>
91 #include <sys/vnode.h>
92 #include <machine/atomic.h>
94 #include <security/audit/audit.h>
96 FEATURE(p1003_1b_mqueue, "POSIX P1003.1B message queues support");
99 * Limits and constants
101 #define MQFS_NAMELEN NAME_MAX
102 #define MQFS_DELEN (8 + MQFS_NAMELEN)
118 * mqfs_info: describes a mqfs instance
122 struct mqfs_node *mi_root;
123 struct unrhdr *mi_unrhdr;
127 LIST_ENTRY(mqfs_vdata) mv_link;
128 struct mqfs_node *mv_node;
129 struct vnode *mv_vnode;
134 * mqfs_node: describes a node (file or directory) within a mqfs
137 char mn_name[MQFS_NAMELEN+1];
138 struct mqfs_info *mn_info;
139 struct mqfs_node *mn_parent;
140 LIST_HEAD(,mqfs_node) mn_children;
141 LIST_ENTRY(mqfs_node) mn_sibling;
142 LIST_HEAD(,mqfs_vdata) mn_vnodes;
143 const void *mn_pr_root;
149 struct timespec mn_birth;
150 struct timespec mn_ctime;
151 struct timespec mn_atime;
152 struct timespec mn_mtime;
158 #define VTON(vp) (((struct mqfs_vdata *)((vp)->v_data))->mv_node)
159 #define VTOMQ(vp) ((struct mqueue *)(VTON(vp)->mn_data))
160 #define VFSTOMQFS(m) ((struct mqfs_info *)((m)->mnt_data))
161 #define FPTOMQ(fp) ((struct mqueue *)(((struct mqfs_node *) \
162 (fp)->f_data)->mn_data))
164 TAILQ_HEAD(msgq, mqueue_msg);
168 struct mqueue_notifier {
169 LIST_ENTRY(mqueue_notifier) nt_link;
170 struct sigevent nt_sigev;
172 struct proc *nt_proc;
185 struct selinfo mq_rsel;
186 struct selinfo mq_wsel;
187 struct mqueue_notifier *mq_notifier;
194 TAILQ_ENTRY(mqueue_msg) msg_link;
195 unsigned int msg_prio;
196 unsigned int msg_size;
197 /* following real data... */
200 static SYSCTL_NODE(_kern, OID_AUTO, mqueue, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
201 "POSIX real time message queue");
203 static int default_maxmsg = 10;
204 static int default_msgsize = 1024;
206 static int maxmsg = 100;
207 SYSCTL_INT(_kern_mqueue, OID_AUTO, maxmsg, CTLFLAG_RW,
208 &maxmsg, 0, "Default maximum messages in queue");
209 static int maxmsgsize = 16384;
210 SYSCTL_INT(_kern_mqueue, OID_AUTO, maxmsgsize, CTLFLAG_RW,
211 &maxmsgsize, 0, "Default maximum message size");
212 static int maxmq = 100;
213 SYSCTL_INT(_kern_mqueue, OID_AUTO, maxmq, CTLFLAG_RW,
214 &maxmq, 0, "maximum message queues");
215 static int curmq = 0;
216 SYSCTL_INT(_kern_mqueue, OID_AUTO, curmq, CTLFLAG_RW,
217 &curmq, 0, "current message queue number");
218 static int unloadable = 0;
219 static MALLOC_DEFINE(M_MQUEUEDATA, "mqdata", "mqueue data");
221 static eventhandler_tag exit_tag;
223 /* Only one instance per-system */
224 static struct mqfs_info mqfs_data;
225 static uma_zone_t mqnode_zone;
226 static uma_zone_t mqueue_zone;
227 static uma_zone_t mvdata_zone;
228 static uma_zone_t mqnoti_zone;
229 static struct vop_vector mqfs_vnodeops;
230 static struct fileops mqueueops;
231 static unsigned mqfs_osd_jail_slot;
234 * Directory structure construction and manipulation
237 static struct mqfs_node *mqfs_create_dir(struct mqfs_node *parent,
238 const char *name, int namelen, struct ucred *cred, int mode);
239 static struct mqfs_node *mqfs_create_link(struct mqfs_node *parent,
240 const char *name, int namelen, struct ucred *cred, int mode);
243 static struct mqfs_node *mqfs_create_file(struct mqfs_node *parent,
244 const char *name, int namelen, struct ucred *cred, int mode);
245 static int mqfs_destroy(struct mqfs_node *mn);
246 static void mqfs_fileno_alloc(struct mqfs_info *mi, struct mqfs_node *mn);
247 static void mqfs_fileno_free(struct mqfs_info *mi, struct mqfs_node *mn);
248 static int mqfs_allocv(struct mount *mp, struct vnode **vpp, struct mqfs_node *pn);
249 static int mqfs_prison_remove(void *obj, void *data);
252 * Message queue construction and maniplation
254 static struct mqueue *mqueue_alloc(const struct mq_attr *attr);
255 static void mqueue_free(struct mqueue *mq);
256 static int mqueue_send(struct mqueue *mq, const char *msg_ptr,
257 size_t msg_len, unsigned msg_prio, int waitok,
258 const struct timespec *abs_timeout);
259 static int mqueue_receive(struct mqueue *mq, char *msg_ptr,
260 size_t msg_len, unsigned *msg_prio, int waitok,
261 const struct timespec *abs_timeout);
262 static int _mqueue_send(struct mqueue *mq, struct mqueue_msg *msg,
264 static int _mqueue_recv(struct mqueue *mq, struct mqueue_msg **msg,
266 static void mqueue_send_notification(struct mqueue *mq);
267 static void mqueue_fdclose(struct thread *td, int fd, struct file *fp);
268 static void mq_proc_exit(void *arg, struct proc *p);
273 static void filt_mqdetach(struct knote *kn);
274 static int filt_mqread(struct knote *kn, long hint);
275 static int filt_mqwrite(struct knote *kn, long hint);
277 struct filterops mq_rfiltops = {
279 .f_detach = filt_mqdetach,
280 .f_event = filt_mqread,
282 struct filterops mq_wfiltops = {
284 .f_detach = filt_mqdetach,
285 .f_event = filt_mqwrite,
289 * Initialize fileno bitmap
292 mqfs_fileno_init(struct mqfs_info *mi)
296 up = new_unrhdr(1, INT_MAX, NULL);
301 * Tear down fileno bitmap
304 mqfs_fileno_uninit(struct mqfs_info *mi)
309 mi->mi_unrhdr = NULL;
314 * Allocate a file number
317 mqfs_fileno_alloc(struct mqfs_info *mi, struct mqfs_node *mn)
319 /* make sure our parent has a file number */
320 if (mn->mn_parent && !mn->mn_parent->mn_fileno)
321 mqfs_fileno_alloc(mi, mn->mn_parent);
323 switch (mn->mn_type) {
327 case mqfstype_symlink:
328 mn->mn_fileno = alloc_unr(mi->mi_unrhdr);
331 KASSERT(mn->mn_parent != NULL,
332 ("mqfstype_this node has no parent"));
333 mn->mn_fileno = mn->mn_parent->mn_fileno;
335 case mqfstype_parent:
336 KASSERT(mn->mn_parent != NULL,
337 ("mqfstype_parent node has no parent"));
338 if (mn->mn_parent == mi->mi_root) {
339 mn->mn_fileno = mn->mn_parent->mn_fileno;
342 KASSERT(mn->mn_parent->mn_parent != NULL,
343 ("mqfstype_parent node has no grandparent"));
344 mn->mn_fileno = mn->mn_parent->mn_parent->mn_fileno;
348 ("mqfs_fileno_alloc() called for unknown type node: %d",
355 * Release a file number
358 mqfs_fileno_free(struct mqfs_info *mi, struct mqfs_node *mn)
360 switch (mn->mn_type) {
364 case mqfstype_symlink:
365 free_unr(mi->mi_unrhdr, mn->mn_fileno);
368 case mqfstype_parent:
369 /* ignore these, as they don't "own" their file number */
373 ("mqfs_fileno_free() called for unknown type node: %d",
379 static __inline struct mqfs_node *
382 return uma_zalloc(mqnode_zone, M_WAITOK | M_ZERO);
386 mqnode_free(struct mqfs_node *node)
388 uma_zfree(mqnode_zone, node);
392 mqnode_addref(struct mqfs_node *node)
394 atomic_add_int(&node->mn_refcount, 1);
398 mqnode_release(struct mqfs_node *node)
400 struct mqfs_info *mqfs;
403 mqfs = node->mn_info;
404 old = atomic_fetchadd_int(&node->mn_refcount, -1);
405 if (node->mn_type == mqfstype_dir ||
406 node->mn_type == mqfstype_root)
407 exp = 3; /* include . and .. */
411 int locked = sx_xlocked(&mqfs->mi_lock);
413 sx_xlock(&mqfs->mi_lock);
416 sx_xunlock(&mqfs->mi_lock);
421 * Add a node to a directory
424 mqfs_add_node(struct mqfs_node *parent, struct mqfs_node *node)
426 KASSERT(parent != NULL, ("%s(): parent is NULL", __func__));
427 KASSERT(parent->mn_info != NULL,
428 ("%s(): parent has no mn_info", __func__));
429 KASSERT(parent->mn_type == mqfstype_dir ||
430 parent->mn_type == mqfstype_root,
431 ("%s(): parent is not a directory", __func__));
433 node->mn_info = parent->mn_info;
434 node->mn_parent = parent;
435 LIST_INIT(&node->mn_children);
436 LIST_INIT(&node->mn_vnodes);
437 LIST_INSERT_HEAD(&parent->mn_children, node, mn_sibling);
438 mqnode_addref(parent);
442 static struct mqfs_node *
443 mqfs_create_node(const char *name, int namelen, struct ucred *cred, int mode,
446 struct mqfs_node *node;
448 node = mqnode_alloc();
449 strncpy(node->mn_name, name, namelen);
450 node->mn_pr_root = cred->cr_prison->pr_root;
451 node->mn_type = nodetype;
452 node->mn_refcount = 1;
453 vfs_timestamp(&node->mn_birth);
454 node->mn_ctime = node->mn_atime = node->mn_mtime
456 node->mn_uid = cred->cr_uid;
457 node->mn_gid = cred->cr_gid;
458 node->mn_mode = mode;
465 static struct mqfs_node *
466 mqfs_create_file(struct mqfs_node *parent, const char *name, int namelen,
467 struct ucred *cred, int mode)
469 struct mqfs_node *node;
471 node = mqfs_create_node(name, namelen, cred, mode, mqfstype_file);
472 if (mqfs_add_node(parent, node) != 0) {
480 * Add . and .. to a directory
483 mqfs_fixup_dir(struct mqfs_node *parent)
485 struct mqfs_node *dir;
487 dir = mqnode_alloc();
488 dir->mn_name[0] = '.';
489 dir->mn_type = mqfstype_this;
490 dir->mn_refcount = 1;
491 if (mqfs_add_node(parent, dir) != 0) {
496 dir = mqnode_alloc();
497 dir->mn_name[0] = dir->mn_name[1] = '.';
498 dir->mn_type = mqfstype_parent;
499 dir->mn_refcount = 1;
501 if (mqfs_add_node(parent, dir) != 0) {
514 static struct mqfs_node *
515 mqfs_create_dir(struct mqfs_node *parent, const char *name, int namelen,
516 struct ucred *cred, int mode)
518 struct mqfs_node *node;
520 node = mqfs_create_node(name, namelen, cred, mode, mqfstype_dir);
521 if (mqfs_add_node(parent, node) != 0) {
526 if (mqfs_fixup_dir(node) != 0) {
536 static struct mqfs_node *
537 mqfs_create_link(struct mqfs_node *parent, const char *name, int namelen,
538 struct ucred *cred, int mode)
540 struct mqfs_node *node;
542 node = mqfs_create_node(name, namelen, cred, mode, mqfstype_symlink);
543 if (mqfs_add_node(parent, node) != 0) {
553 * Destroy a node or a tree of nodes
556 mqfs_destroy(struct mqfs_node *node)
558 struct mqfs_node *parent;
560 KASSERT(node != NULL,
561 ("%s(): node is NULL", __func__));
562 KASSERT(node->mn_info != NULL,
563 ("%s(): node has no mn_info", __func__));
565 /* destroy children */
566 if (node->mn_type == mqfstype_dir || node->mn_type == mqfstype_root)
567 while (! LIST_EMPTY(&node->mn_children))
568 mqfs_destroy(LIST_FIRST(&node->mn_children));
570 /* unlink from parent */
571 if ((parent = node->mn_parent) != NULL) {
572 KASSERT(parent->mn_info == node->mn_info,
573 ("%s(): parent has different mn_info", __func__));
574 LIST_REMOVE(node, mn_sibling);
577 if (node->mn_fileno != 0)
578 mqfs_fileno_free(node->mn_info, node);
579 if (node->mn_data != NULL)
580 mqueue_free(node->mn_data);
586 * Mount a mqfs instance
589 mqfs_mount(struct mount *mp)
593 if (mp->mnt_flag & MNT_UPDATE)
596 mp->mnt_data = &mqfs_data;
598 mp->mnt_flag |= MNT_LOCAL;
603 vfs_mountedfrom(mp, "mqueue");
604 sbp->f_bsize = PAGE_SIZE;
605 sbp->f_iosize = PAGE_SIZE;
615 * Unmount a mqfs instance
618 mqfs_unmount(struct mount *mp, int mntflags)
622 error = vflush(mp, 0, (mntflags & MNT_FORCE) ? FORCECLOSE : 0,
628 * Return a root vnode
631 mqfs_root(struct mount *mp, int flags, struct vnode **vpp)
633 struct mqfs_info *mqfs;
636 mqfs = VFSTOMQFS(mp);
637 ret = mqfs_allocv(mp, vpp, mqfs->mi_root);
642 * Return filesystem stats
645 mqfs_statfs(struct mount *mp, struct statfs *sbp)
647 /* XXX update statistics */
652 * Initialize a mqfs instance
655 mqfs_init(struct vfsconf *vfc)
657 struct mqfs_node *root;
658 struct mqfs_info *mi;
659 osd_method_t methods[PR_MAXMETHOD] = {
660 [PR_METHOD_REMOVE] = mqfs_prison_remove,
663 mqnode_zone = uma_zcreate("mqnode", sizeof(struct mqfs_node),
664 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
665 mqueue_zone = uma_zcreate("mqueue", sizeof(struct mqueue),
666 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
667 mvdata_zone = uma_zcreate("mvdata",
668 sizeof(struct mqfs_vdata), NULL, NULL, NULL,
669 NULL, UMA_ALIGN_PTR, 0);
670 mqnoti_zone = uma_zcreate("mqnotifier", sizeof(struct mqueue_notifier),
671 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
673 sx_init(&mi->mi_lock, "mqfs lock");
674 /* set up the root diretory */
675 root = mqfs_create_node("/", 1, curthread->td_ucred, 01777,
678 LIST_INIT(&root->mn_children);
679 LIST_INIT(&root->mn_vnodes);
681 mqfs_fileno_init(mi);
682 mqfs_fileno_alloc(mi, root);
683 mqfs_fixup_dir(root);
684 exit_tag = EVENTHANDLER_REGISTER(process_exit, mq_proc_exit, NULL,
685 EVENTHANDLER_PRI_ANY);
686 mq_fdclose = mqueue_fdclose;
687 p31b_setcfg(CTL_P1003_1B_MESSAGE_PASSING, _POSIX_MESSAGE_PASSING);
688 mqfs_osd_jail_slot = osd_jail_register(NULL, methods);
693 * Destroy a mqfs instance
696 mqfs_uninit(struct vfsconf *vfc)
698 struct mqfs_info *mi;
702 osd_jail_deregister(mqfs_osd_jail_slot);
703 EVENTHANDLER_DEREGISTER(process_exit, exit_tag);
705 mqfs_destroy(mi->mi_root);
707 mqfs_fileno_uninit(mi);
708 sx_destroy(&mi->mi_lock);
709 uma_zdestroy(mqnode_zone);
710 uma_zdestroy(mqueue_zone);
711 uma_zdestroy(mvdata_zone);
712 uma_zdestroy(mqnoti_zone);
720 do_recycle(void *context, int pending __unused)
722 struct vnode *vp = (struct vnode *)context;
724 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
734 mqfs_allocv(struct mount *mp, struct vnode **vpp, struct mqfs_node *pn)
736 struct mqfs_vdata *vd;
737 struct mqfs_info *mqfs;
738 struct vnode *newvpp;
743 sx_xlock(&mqfs->mi_lock);
744 LIST_FOREACH(vd, &pn->mn_vnodes, mv_link) {
745 if (vd->mv_vnode->v_mount == mp) {
754 sx_xunlock(&mqfs->mi_lock);
755 error = vget(*vpp, LK_RETRY | LK_EXCLUSIVE);
759 sx_xunlock(&mqfs->mi_lock);
761 error = getnewvnode("mqueue", mp, &mqfs_vnodeops, &newvpp);
764 vn_lock(newvpp, LK_EXCLUSIVE | LK_RETRY);
765 error = insmntque(newvpp, mp);
769 sx_xlock(&mqfs->mi_lock);
771 * Check if it has already been allocated
772 * while we were blocked.
774 LIST_FOREACH(vd, &pn->mn_vnodes, mv_link) {
775 if (vd->mv_vnode->v_mount == mp) {
777 sx_xunlock(&mqfs->mi_lock);
787 vd = uma_zalloc(mvdata_zone, M_WAITOK);
791 TASK_INIT(&vd->mv_task, 0, do_recycle, *vpp);
792 LIST_INSERT_HEAD(&pn->mn_vnodes, vd, mv_link);
794 switch (pn->mn_type) {
796 (*vpp)->v_vflag = VV_ROOT;
800 case mqfstype_parent:
801 (*vpp)->v_type = VDIR;
804 (*vpp)->v_type = VREG;
806 case mqfstype_symlink:
807 (*vpp)->v_type = VLNK;
810 KASSERT(0, ("mqfs_allocf called for null node\n"));
812 panic("%s has unexpected type: %d", pn->mn_name, pn->mn_type);
814 sx_xunlock(&mqfs->mi_lock);
819 * Search a directory entry
821 static struct mqfs_node *
822 mqfs_search(struct mqfs_node *pd, const char *name, int len, struct ucred *cred)
824 struct mqfs_node *pn;
827 sx_assert(&pd->mn_info->mi_lock, SX_LOCKED);
828 pr_root = cred->cr_prison->pr_root;
829 LIST_FOREACH(pn, &pd->mn_children, mn_sibling) {
830 /* Only match names within the same prison root directory */
831 if ((pn->mn_pr_root == NULL || pn->mn_pr_root == pr_root) &&
832 strncmp(pn->mn_name, name, len) == 0 &&
833 pn->mn_name[len] == '\0')
840 * Look up a file or directory.
843 mqfs_lookupx(struct vop_cachedlookup_args *ap)
845 struct componentname *cnp;
846 struct vnode *dvp, **vpp;
847 struct mqfs_node *pd;
848 struct mqfs_node *pn;
849 struct mqfs_info *mqfs;
850 int nameiop, flags, error, namelen;
857 pname = cnp->cn_nameptr;
858 namelen = cnp->cn_namelen;
860 flags = cnp->cn_flags;
861 nameiop = cnp->cn_nameiop;
867 if (dvp->v_type != VDIR)
870 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_thread);
874 /* shortcut: check if the name is too long */
875 if (cnp->cn_namelen >= MQFS_NAMELEN)
879 if (namelen == 1 && pname[0] == '.') {
880 if ((flags & ISLASTCN) && nameiop != LOOKUP)
889 if (cnp->cn_flags & ISDOTDOT) {
890 if (dvp->v_vflag & VV_ROOT)
892 if ((flags & ISLASTCN) && nameiop != LOOKUP)
895 KASSERT(pd->mn_parent, ("non-root directory has no parent"));
897 error = mqfs_allocv(dvp->v_mount, vpp, pn);
898 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
903 sx_xlock(&mqfs->mi_lock);
904 pn = mqfs_search(pd, pname, namelen, cnp->cn_cred);
907 sx_xunlock(&mqfs->mi_lock);
912 if (nameiop == DELETE && (flags & ISLASTCN)) {
913 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
927 error = mqfs_allocv(dvp->v_mount, vpp, pn);
929 if (error == 0 && cnp->cn_flags & MAKEENTRY)
930 cache_enter(dvp, *vpp, cnp);
936 /* will create a new entry in the directory ? */
937 if ((nameiop == CREATE || nameiop == RENAME) && (flags & LOCKPARENT)
938 && (flags & ISLASTCN)) {
939 error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
942 cnp->cn_flags |= SAVENAME;
943 return (EJUSTRETURN);
949 struct vop_lookup_args {
950 struct vop_generic_args a_gen;
952 struct vnode **a_vpp;
953 struct componentname *a_cnp;
958 * vnode lookup operation
961 mqfs_lookup(struct vop_cachedlookup_args *ap)
965 rc = mqfs_lookupx(ap);
970 struct vop_create_args {
972 struct vnode **a_vpp;
973 struct componentname *a_cnp;
979 * vnode creation operation
982 mqfs_create(struct vop_create_args *ap)
984 struct mqfs_info *mqfs = VFSTOMQFS(ap->a_dvp->v_mount);
985 struct componentname *cnp = ap->a_cnp;
986 struct mqfs_node *pd;
987 struct mqfs_node *pn;
991 pd = VTON(ap->a_dvp);
992 if (pd->mn_type != mqfstype_root && pd->mn_type != mqfstype_dir)
994 mq = mqueue_alloc(NULL);
997 sx_xlock(&mqfs->mi_lock);
998 if ((cnp->cn_flags & HASBUF) == 0)
999 panic("%s: no name", __func__);
1000 pn = mqfs_create_file(pd, cnp->cn_nameptr, cnp->cn_namelen,
1001 cnp->cn_cred, ap->a_vap->va_mode);
1003 sx_xunlock(&mqfs->mi_lock);
1007 sx_xunlock(&mqfs->mi_lock);
1008 error = mqfs_allocv(ap->a_dvp->v_mount, ap->a_vpp, pn);
1024 int do_unlink(struct mqfs_node *pn, struct ucred *ucred)
1026 struct mqfs_node *parent;
1027 struct mqfs_vdata *vd;
1030 sx_assert(&pn->mn_info->mi_lock, SX_LOCKED);
1032 if (ucred->cr_uid != pn->mn_uid &&
1033 (error = priv_check_cred(ucred, PRIV_MQ_ADMIN)) != 0)
1035 else if (!pn->mn_deleted) {
1036 parent = pn->mn_parent;
1037 pn->mn_parent = NULL;
1039 LIST_REMOVE(pn, mn_sibling);
1040 LIST_FOREACH(vd, &pn->mn_vnodes, mv_link) {
1041 cache_purge(vd->mv_vnode);
1042 vhold(vd->mv_vnode);
1043 taskqueue_enqueue(taskqueue_thread, &vd->mv_task);
1046 mqnode_release(parent);
1053 struct vop_remove_args {
1054 struct vnode *a_dvp;
1056 struct componentname *a_cnp;
1061 * vnode removal operation
1064 mqfs_remove(struct vop_remove_args *ap)
1066 struct mqfs_info *mqfs = VFSTOMQFS(ap->a_dvp->v_mount);
1067 struct mqfs_node *pn;
1070 if (ap->a_vp->v_type == VDIR)
1072 pn = VTON(ap->a_vp);
1073 sx_xlock(&mqfs->mi_lock);
1074 error = do_unlink(pn, ap->a_cnp->cn_cred);
1075 sx_xunlock(&mqfs->mi_lock);
1080 struct vop_inactive_args {
1082 struct thread *a_td;
1087 mqfs_inactive(struct vop_inactive_args *ap)
1089 struct mqfs_node *pn = VTON(ap->a_vp);
1097 struct vop_reclaim_args {
1098 struct vop_generic_args a_gen;
1104 mqfs_reclaim(struct vop_reclaim_args *ap)
1106 struct mqfs_info *mqfs = VFSTOMQFS(ap->a_vp->v_mount);
1107 struct vnode *vp = ap->a_vp;
1108 struct mqfs_node *pn;
1109 struct mqfs_vdata *vd;
1113 sx_xlock(&mqfs->mi_lock);
1115 LIST_REMOVE(vd, mv_link);
1116 uma_zfree(mvdata_zone, vd);
1118 sx_xunlock(&mqfs->mi_lock);
1123 struct vop_open_args {
1124 struct vop_generic_args a_gen;
1127 struct ucred *a_cred;
1128 struct thread *a_td;
1134 mqfs_open(struct vop_open_args *ap)
1140 struct vop_close_args {
1141 struct vop_generic_args a_gen;
1144 struct ucred *a_cred;
1145 struct thread *a_td;
1150 mqfs_close(struct vop_close_args *ap)
1156 struct vop_access_args {
1157 struct vop_generic_args a_gen;
1159 accmode_t a_accmode;
1160 struct ucred *a_cred;
1161 struct thread *a_td;
1166 * Verify permissions
1169 mqfs_access(struct vop_access_args *ap)
1171 struct vnode *vp = ap->a_vp;
1175 error = VOP_GETATTR(vp, &vattr, ap->a_cred);
1178 error = vaccess(vp->v_type, vattr.va_mode, vattr.va_uid, vattr.va_gid,
1179 ap->a_accmode, ap->a_cred);
1184 struct vop_getattr_args {
1185 struct vop_generic_args a_gen;
1187 struct vattr *a_vap;
1188 struct ucred *a_cred;
1193 * Get file attributes
1196 mqfs_getattr(struct vop_getattr_args *ap)
1198 struct vnode *vp = ap->a_vp;
1199 struct mqfs_node *pn = VTON(vp);
1200 struct vattr *vap = ap->a_vap;
1203 vap->va_type = vp->v_type;
1204 vap->va_mode = pn->mn_mode;
1206 vap->va_uid = pn->mn_uid;
1207 vap->va_gid = pn->mn_gid;
1208 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
1209 vap->va_fileid = pn->mn_fileno;
1211 vap->va_blocksize = PAGE_SIZE;
1212 vap->va_bytes = vap->va_size = 0;
1213 vap->va_atime = pn->mn_atime;
1214 vap->va_mtime = pn->mn_mtime;
1215 vap->va_ctime = pn->mn_ctime;
1216 vap->va_birthtime = pn->mn_birth;
1219 vap->va_rdev = NODEV;
1221 vap->va_filerev = 0;
1226 struct vop_setattr_args {
1227 struct vop_generic_args a_gen;
1229 struct vattr *a_vap;
1230 struct ucred *a_cred;
1237 mqfs_setattr(struct vop_setattr_args *ap)
1239 struct mqfs_node *pn;
1250 if ((vap->va_type != VNON) ||
1251 (vap->va_nlink != VNOVAL) ||
1252 (vap->va_fsid != VNOVAL) ||
1253 (vap->va_fileid != VNOVAL) ||
1254 (vap->va_blocksize != VNOVAL) ||
1255 (vap->va_flags != VNOVAL && vap->va_flags != 0) ||
1256 (vap->va_rdev != VNOVAL) ||
1257 ((int)vap->va_bytes != VNOVAL) ||
1258 (vap->va_gen != VNOVAL)) {
1265 if (vap->va_uid == (uid_t)VNOVAL)
1269 if (vap->va_gid == (gid_t)VNOVAL)
1274 if (uid != pn->mn_uid || gid != pn->mn_gid) {
1276 * To modify the ownership of a file, must possess VADMIN
1279 if ((error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td)))
1283 * XXXRW: Why is there a privilege check here: shouldn't the
1284 * check in VOP_ACCESS() be enough? Also, are the group bits
1285 * below definitely right?
1287 if (((ap->a_cred->cr_uid != pn->mn_uid) || uid != pn->mn_uid ||
1288 (gid != pn->mn_gid && !groupmember(gid, ap->a_cred))) &&
1289 (error = priv_check(td, PRIV_MQ_ADMIN)) != 0)
1296 if (vap->va_mode != (mode_t)VNOVAL) {
1297 if ((ap->a_cred->cr_uid != pn->mn_uid) &&
1298 (error = priv_check(td, PRIV_MQ_ADMIN)))
1300 pn->mn_mode = vap->va_mode;
1304 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
1305 /* See the comment in ufs_vnops::ufs_setattr(). */
1306 if ((error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td)) &&
1307 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
1308 (error = VOP_ACCESS(vp, VWRITE, ap->a_cred, td))))
1310 if (vap->va_atime.tv_sec != VNOVAL) {
1311 pn->mn_atime = vap->va_atime;
1313 if (vap->va_mtime.tv_sec != VNOVAL) {
1314 pn->mn_mtime = vap->va_mtime;
1319 vfs_timestamp(&pn->mn_ctime);
1325 struct vop_read_args {
1326 struct vop_generic_args a_gen;
1330 struct ucred *a_cred;
1338 mqfs_read(struct vop_read_args *ap)
1341 struct vnode *vp = ap->a_vp;
1342 struct uio *uio = ap->a_uio;
1346 if (vp->v_type != VREG)
1350 snprintf(buf, sizeof(buf),
1351 "QSIZE:%-10ld MAXMSG:%-10ld CURMSG:%-10ld MSGSIZE:%-10ld\n",
1356 buf[sizeof(buf)-1] = '\0';
1358 error = uiomove_frombuf(buf, len, uio);
1363 struct vop_readdir_args {
1364 struct vop_generic_args a_gen;
1367 struct ucred *a_cred;
1375 * Return directory entries.
1378 mqfs_readdir(struct vop_readdir_args *ap)
1381 struct mqfs_info *mi;
1382 struct mqfs_node *pd;
1383 struct mqfs_node *pn;
1384 struct dirent entry;
1386 const void *pr_root;
1387 int *tmp_ncookies = NULL;
1392 mi = VFSTOMQFS(vp->v_mount);
1396 if (vp->v_type != VDIR)
1399 if (uio->uio_offset < 0)
1402 if (ap->a_ncookies != NULL) {
1403 tmp_ncookies = ap->a_ncookies;
1404 *ap->a_ncookies = 0;
1405 ap->a_ncookies = NULL;
1411 pr_root = ap->a_cred->cr_prison->pr_root;
1412 sx_xlock(&mi->mi_lock);
1414 LIST_FOREACH(pn, &pd->mn_children, mn_sibling) {
1415 entry.d_reclen = sizeof(entry);
1418 * Only show names within the same prison root directory
1419 * (or not associated with a prison, e.g. "." and "..").
1421 if (pn->mn_pr_root != NULL && pn->mn_pr_root != pr_root)
1424 mqfs_fileno_alloc(mi, pn);
1425 entry.d_fileno = pn->mn_fileno;
1426 entry.d_off = offset + entry.d_reclen;
1427 for (i = 0; i < MQFS_NAMELEN - 1 && pn->mn_name[i] != '\0'; ++i)
1428 entry.d_name[i] = pn->mn_name[i];
1430 switch (pn->mn_type) {
1434 case mqfstype_parent:
1435 entry.d_type = DT_DIR;
1438 entry.d_type = DT_REG;
1440 case mqfstype_symlink:
1441 entry.d_type = DT_LNK;
1444 panic("%s has unexpected node type: %d", pn->mn_name,
1447 dirent_terminate(&entry);
1448 if (entry.d_reclen > uio->uio_resid)
1450 if (offset >= uio->uio_offset) {
1451 error = vfs_read_dirent(ap, &entry, offset);
1455 offset += entry.d_reclen;
1457 sx_xunlock(&mi->mi_lock);
1459 uio->uio_offset = offset;
1461 if (tmp_ncookies != NULL)
1462 ap->a_ncookies = tmp_ncookies;
1470 struct vop_mkdir_args {
1471 struct vnode *a_dvp;
1472 struvt vnode **a_vpp;
1473 struvt componentname *a_cnp;
1474 struct vattr *a_vap;
1479 * Create a directory.
1482 mqfs_mkdir(struct vop_mkdir_args *ap)
1484 struct mqfs_info *mqfs = VFSTOMQFS(ap->a_dvp->v_mount);
1485 struct componentname *cnp = ap->a_cnp;
1486 struct mqfs_node *pd = VTON(ap->a_dvp);
1487 struct mqfs_node *pn;
1490 if (pd->mn_type != mqfstype_root && pd->mn_type != mqfstype_dir)
1492 sx_xlock(&mqfs->mi_lock);
1493 if ((cnp->cn_flags & HASBUF) == 0)
1494 panic("%s: no name", __func__);
1495 pn = mqfs_create_dir(pd, cnp->cn_nameptr, cnp->cn_namelen,
1496 ap->a_vap->cn_cred, ap->a_vap->va_mode);
1499 sx_xunlock(&mqfs->mi_lock);
1503 error = mqfs_allocv(ap->a_dvp->v_mount, ap->a_vpp, pn);
1510 struct vop_rmdir_args {
1511 struct vnode *a_dvp;
1513 struct componentname *a_cnp;
1518 * Remove a directory.
1521 mqfs_rmdir(struct vop_rmdir_args *ap)
1523 struct mqfs_info *mqfs = VFSTOMQFS(ap->a_dvp->v_mount);
1524 struct mqfs_node *pn = VTON(ap->a_vp);
1525 struct mqfs_node *pt;
1527 if (pn->mn_type != mqfstype_dir)
1530 sx_xlock(&mqfs->mi_lock);
1531 if (pn->mn_deleted) {
1532 sx_xunlock(&mqfs->mi_lock);
1536 pt = LIST_FIRST(&pn->mn_children);
1537 pt = LIST_NEXT(pt, mn_sibling);
1538 pt = LIST_NEXT(pt, mn_sibling);
1540 sx_xunlock(&mqfs->mi_lock);
1544 pn->mn_parent = NULL;
1546 LIST_REMOVE(pn, mn_sibling);
1549 sx_xunlock(&mqfs->mi_lock);
1550 cache_purge(ap->a_vp);
1557 * See if this prison root is obsolete, and clean up associated queues if it is.
1560 mqfs_prison_remove(void *obj, void *data __unused)
1562 const struct prison *pr = obj;
1564 struct mqfs_node *pn, *tpn;
1565 struct vnode *pr_root;
1567 pr_root = pr->pr_root;
1568 if (pr->pr_parent->pr_root == pr_root)
1570 TAILQ_FOREACH(tpr, &allprison, pr_list) {
1571 if (tpr != pr && tpr->pr_root == pr_root)
1575 * No jails are rooted in this directory anymore,
1576 * so no queues should be either.
1578 sx_xlock(&mqfs_data.mi_lock);
1579 LIST_FOREACH_SAFE(pn, &mqfs_data.mi_root->mn_children,
1581 if (pn->mn_pr_root == pr_root)
1582 (void)do_unlink(pn, curthread->td_ucred);
1584 sx_xunlock(&mqfs_data.mi_lock);
1589 * Allocate a message queue
1591 static struct mqueue *
1592 mqueue_alloc(const struct mq_attr *attr)
1598 mq = uma_zalloc(mqueue_zone, M_WAITOK | M_ZERO);
1599 TAILQ_INIT(&mq->mq_msgq);
1601 mq->mq_maxmsg = attr->mq_maxmsg;
1602 mq->mq_msgsize = attr->mq_msgsize;
1604 mq->mq_maxmsg = default_maxmsg;
1605 mq->mq_msgsize = default_msgsize;
1607 mtx_init(&mq->mq_mutex, "mqueue lock", NULL, MTX_DEF);
1608 knlist_init_mtx(&mq->mq_rsel.si_note, &mq->mq_mutex);
1609 knlist_init_mtx(&mq->mq_wsel.si_note, &mq->mq_mutex);
1610 atomic_add_int(&curmq, 1);
1615 * Destroy a message queue
1618 mqueue_free(struct mqueue *mq)
1620 struct mqueue_msg *msg;
1622 while ((msg = TAILQ_FIRST(&mq->mq_msgq)) != NULL) {
1623 TAILQ_REMOVE(&mq->mq_msgq, msg, msg_link);
1624 free(msg, M_MQUEUEDATA);
1627 mtx_destroy(&mq->mq_mutex);
1628 seldrain(&mq->mq_rsel);
1629 seldrain(&mq->mq_wsel);
1630 knlist_destroy(&mq->mq_rsel.si_note);
1631 knlist_destroy(&mq->mq_wsel.si_note);
1632 uma_zfree(mqueue_zone, mq);
1633 atomic_add_int(&curmq, -1);
1637 * Load a message from user space
1639 static struct mqueue_msg *
1640 mqueue_loadmsg(const char *msg_ptr, size_t msg_size, int msg_prio)
1642 struct mqueue_msg *msg;
1646 len = sizeof(struct mqueue_msg) + msg_size;
1647 msg = malloc(len, M_MQUEUEDATA, M_WAITOK);
1648 error = copyin(msg_ptr, ((char *)msg) + sizeof(struct mqueue_msg),
1651 free(msg, M_MQUEUEDATA);
1654 msg->msg_size = msg_size;
1655 msg->msg_prio = msg_prio;
1661 * Save a message to user space
1664 mqueue_savemsg(struct mqueue_msg *msg, char *msg_ptr, int *msg_prio)
1668 error = copyout(((char *)msg) + sizeof(*msg), msg_ptr,
1670 if (error == 0 && msg_prio != NULL)
1671 error = copyout(&msg->msg_prio, msg_prio, sizeof(int));
1676 * Free a message's memory
1678 static __inline void
1679 mqueue_freemsg(struct mqueue_msg *msg)
1681 free(msg, M_MQUEUEDATA);
1685 * Send a message. if waitok is false, thread will not be
1686 * blocked if there is no data in queue, otherwise, absolute
1687 * time will be checked.
1690 mqueue_send(struct mqueue *mq, const char *msg_ptr,
1691 size_t msg_len, unsigned msg_prio, int waitok,
1692 const struct timespec *abs_timeout)
1694 struct mqueue_msg *msg;
1695 struct timespec ts, ts2;
1699 if (msg_prio >= MQ_PRIO_MAX)
1701 if (msg_len > mq->mq_msgsize)
1703 msg = mqueue_loadmsg(msg_ptr, msg_len, msg_prio);
1707 /* O_NONBLOCK case */
1709 error = _mqueue_send(mq, msg, -1);
1715 /* we allow a null timeout (wait forever) */
1716 if (abs_timeout == NULL) {
1717 error = _mqueue_send(mq, msg, 0);
1723 /* send it before checking time */
1724 error = _mqueue_send(mq, msg, -1);
1728 if (error != EAGAIN)
1731 if (abs_timeout->tv_nsec >= 1000000000 || abs_timeout->tv_nsec < 0) {
1737 timespecsub(abs_timeout, &ts, &ts2);
1738 if (ts2.tv_sec < 0 || (ts2.tv_sec == 0 && ts2.tv_nsec <= 0)) {
1742 TIMESPEC_TO_TIMEVAL(&tv, &ts2);
1743 error = _mqueue_send(mq, msg, tvtohz(&tv));
1744 if (error != ETIMEDOUT)
1750 mqueue_freemsg(msg);
1755 * Common routine to send a message
1758 _mqueue_send(struct mqueue *mq, struct mqueue_msg *msg, int timo)
1760 struct mqueue_msg *msg2;
1763 mtx_lock(&mq->mq_mutex);
1764 while (mq->mq_curmsgs >= mq->mq_maxmsg && error == 0) {
1766 mtx_unlock(&mq->mq_mutex);
1770 error = msleep(&mq->mq_senders, &mq->mq_mutex,
1771 PCATCH, "mqsend", timo);
1773 if (error == EAGAIN)
1776 if (mq->mq_curmsgs >= mq->mq_maxmsg) {
1777 mtx_unlock(&mq->mq_mutex);
1781 if (TAILQ_EMPTY(&mq->mq_msgq)) {
1782 TAILQ_INSERT_HEAD(&mq->mq_msgq, msg, msg_link);
1784 if (msg->msg_prio <= TAILQ_LAST(&mq->mq_msgq, msgq)->msg_prio) {
1785 TAILQ_INSERT_TAIL(&mq->mq_msgq, msg, msg_link);
1787 TAILQ_FOREACH(msg2, &mq->mq_msgq, msg_link) {
1788 if (msg2->msg_prio < msg->msg_prio)
1791 TAILQ_INSERT_BEFORE(msg2, msg, msg_link);
1795 mq->mq_totalbytes += msg->msg_size;
1796 if (mq->mq_receivers)
1797 wakeup_one(&mq->mq_receivers);
1798 else if (mq->mq_notifier != NULL)
1799 mqueue_send_notification(mq);
1800 if (mq->mq_flags & MQ_RSEL) {
1801 mq->mq_flags &= ~MQ_RSEL;
1802 selwakeup(&mq->mq_rsel);
1804 KNOTE_LOCKED(&mq->mq_rsel.si_note, 0);
1805 mtx_unlock(&mq->mq_mutex);
1810 * Send realtime a signal to process which registered itself
1811 * successfully by mq_notify.
1814 mqueue_send_notification(struct mqueue *mq)
1816 struct mqueue_notifier *nt;
1821 mtx_assert(&mq->mq_mutex, MA_OWNED);
1822 nt = mq->mq_notifier;
1823 if (nt->nt_sigev.sigev_notify != SIGEV_NONE) {
1825 error = sigev_findtd(p, &nt->nt_sigev, &td);
1827 mq->mq_notifier = NULL;
1830 if (!KSI_ONQ(&nt->nt_ksi)) {
1831 ksiginfo_set_sigev(&nt->nt_ksi, &nt->nt_sigev);
1832 tdsendsignal(p, td, nt->nt_ksi.ksi_signo, &nt->nt_ksi);
1836 mq->mq_notifier = NULL;
1840 * Get a message. if waitok is false, thread will not be
1841 * blocked if there is no data in queue, otherwise, absolute
1842 * time will be checked.
1845 mqueue_receive(struct mqueue *mq, char *msg_ptr,
1846 size_t msg_len, unsigned *msg_prio, int waitok,
1847 const struct timespec *abs_timeout)
1849 struct mqueue_msg *msg;
1850 struct timespec ts, ts2;
1854 if (msg_len < mq->mq_msgsize)
1857 /* O_NONBLOCK case */
1859 error = _mqueue_recv(mq, &msg, -1);
1865 /* we allow a null timeout (wait forever). */
1866 if (abs_timeout == NULL) {
1867 error = _mqueue_recv(mq, &msg, 0);
1873 /* try to get a message before checking time */
1874 error = _mqueue_recv(mq, &msg, -1);
1878 if (error != EAGAIN)
1881 if (abs_timeout->tv_nsec >= 1000000000 || abs_timeout->tv_nsec < 0) {
1888 timespecsub(abs_timeout, &ts, &ts2);
1889 if (ts2.tv_sec < 0 || (ts2.tv_sec == 0 && ts2.tv_nsec <= 0)) {
1893 TIMESPEC_TO_TIMEVAL(&tv, &ts2);
1894 error = _mqueue_recv(mq, &msg, tvtohz(&tv));
1897 if (error != ETIMEDOUT)
1902 error = mqueue_savemsg(msg, msg_ptr, msg_prio);
1904 curthread->td_retval[0] = msg->msg_size;
1905 curthread->td_retval[1] = 0;
1907 mqueue_freemsg(msg);
1912 * Common routine to receive a message
1915 _mqueue_recv(struct mqueue *mq, struct mqueue_msg **msg, int timo)
1919 mtx_lock(&mq->mq_mutex);
1920 while ((*msg = TAILQ_FIRST(&mq->mq_msgq)) == NULL && error == 0) {
1922 mtx_unlock(&mq->mq_mutex);
1926 error = msleep(&mq->mq_receivers, &mq->mq_mutex,
1927 PCATCH, "mqrecv", timo);
1929 if (error == EAGAIN)
1934 TAILQ_REMOVE(&mq->mq_msgq, *msg, msg_link);
1936 mq->mq_totalbytes -= (*msg)->msg_size;
1938 wakeup_one(&mq->mq_senders);
1939 if (mq->mq_flags & MQ_WSEL) {
1940 mq->mq_flags &= ~MQ_WSEL;
1941 selwakeup(&mq->mq_wsel);
1943 KNOTE_LOCKED(&mq->mq_wsel.si_note, 0);
1945 if (mq->mq_notifier != NULL && mq->mq_receivers == 0 &&
1946 !TAILQ_EMPTY(&mq->mq_msgq)) {
1947 mqueue_send_notification(mq);
1949 mtx_unlock(&mq->mq_mutex);
1953 static __inline struct mqueue_notifier *
1954 notifier_alloc(void)
1956 return (uma_zalloc(mqnoti_zone, M_WAITOK | M_ZERO));
1959 static __inline void
1960 notifier_free(struct mqueue_notifier *p)
1962 uma_zfree(mqnoti_zone, p);
1965 static struct mqueue_notifier *
1966 notifier_search(struct proc *p, int fd)
1968 struct mqueue_notifier *nt;
1970 LIST_FOREACH(nt, &p->p_mqnotifier, nt_link) {
1971 if (nt->nt_ksi.ksi_mqd == fd)
1977 static __inline void
1978 notifier_insert(struct proc *p, struct mqueue_notifier *nt)
1980 LIST_INSERT_HEAD(&p->p_mqnotifier, nt, nt_link);
1983 static __inline void
1984 notifier_delete(struct proc *p, struct mqueue_notifier *nt)
1986 LIST_REMOVE(nt, nt_link);
1991 notifier_remove(struct proc *p, struct mqueue *mq, int fd)
1993 struct mqueue_notifier *nt;
1995 mtx_assert(&mq->mq_mutex, MA_OWNED);
1997 nt = notifier_search(p, fd);
1999 if (mq->mq_notifier == nt)
2000 mq->mq_notifier = NULL;
2001 sigqueue_take(&nt->nt_ksi);
2002 notifier_delete(p, nt);
2008 kern_kmq_open(struct thread *td, const char *upath, int flags, mode_t mode,
2009 const struct mq_attr *attr)
2011 char path[MQFS_NAMELEN + 1];
2012 struct mqfs_node *pn;
2013 struct pwddesc *pdp;
2016 int fd, error, len, cmode;
2018 AUDIT_ARG_FFLAGS(flags);
2019 AUDIT_ARG_MODE(mode);
2021 pdp = td->td_proc->p_pd;
2022 cmode = (((mode & ~pdp->pd_cmask) & ALLPERMS) & ~S_ISTXT);
2024 if ((flags & O_CREAT) != 0 && attr != NULL) {
2025 if (attr->mq_maxmsg <= 0 || attr->mq_maxmsg > maxmsg)
2027 if (attr->mq_msgsize <= 0 || attr->mq_msgsize > maxmsgsize)
2031 error = copyinstr(upath, path, MQFS_NAMELEN + 1, NULL);
2036 * The first character of name must be a slash (/) character
2037 * and the remaining characters of name cannot include any slash
2041 if (len < 2 || path[0] != '/' || strchr(path + 1, '/') != NULL)
2044 * "." and ".." are magic directories, populated on the fly, and cannot
2045 * be opened as queues.
2047 if (strcmp(path, "/.") == 0 || strcmp(path, "/..") == 0)
2049 AUDIT_ARG_UPATH1_CANON(path);
2051 error = falloc(td, &fp, &fd, O_CLOEXEC);
2055 sx_xlock(&mqfs_data.mi_lock);
2056 pn = mqfs_search(mqfs_data.mi_root, path + 1, len - 1, td->td_ucred);
2058 if (!(flags & O_CREAT)) {
2061 mq = mqueue_alloc(attr);
2065 pn = mqfs_create_file(mqfs_data.mi_root,
2066 path + 1, len - 1, td->td_ucred,
2079 if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) {
2082 accmode_t accmode = 0;
2088 error = vaccess(VREG, pn->mn_mode, pn->mn_uid,
2089 pn->mn_gid, accmode, td->td_ucred);
2094 sx_xunlock(&mqfs_data.mi_lock);
2095 fdclose(td, fp, fd);
2101 sx_xunlock(&mqfs_data.mi_lock);
2103 finit(fp, flags & (FREAD | FWRITE | O_NONBLOCK), DTYPE_MQUEUE, pn,
2106 td->td_retval[0] = fd;
2112 * Syscall to open a message queue.
2115 sys_kmq_open(struct thread *td, struct kmq_open_args *uap)
2117 struct mq_attr attr;
2120 if ((uap->flags & O_ACCMODE) == O_ACCMODE || uap->flags & O_EXEC)
2122 flags = FFLAGS(uap->flags);
2123 if ((flags & O_CREAT) != 0 && uap->attr != NULL) {
2124 error = copyin(uap->attr, &attr, sizeof(attr));
2128 return (kern_kmq_open(td, uap->path, flags, uap->mode,
2129 uap->attr != NULL ? &attr : NULL));
2133 * Syscall to unlink a message queue.
2136 sys_kmq_unlink(struct thread *td, struct kmq_unlink_args *uap)
2138 char path[MQFS_NAMELEN+1];
2139 struct mqfs_node *pn;
2142 error = copyinstr(uap->path, path, MQFS_NAMELEN + 1, NULL);
2147 if (len < 2 || path[0] != '/' || strchr(path + 1, '/') != NULL)
2149 if (strcmp(path, "/.") == 0 || strcmp(path, "/..") == 0)
2151 AUDIT_ARG_UPATH1_CANON(path);
2153 sx_xlock(&mqfs_data.mi_lock);
2154 pn = mqfs_search(mqfs_data.mi_root, path + 1, len - 1, td->td_ucred);
2156 error = do_unlink(pn, td->td_ucred);
2159 sx_xunlock(&mqfs_data.mi_lock);
2163 typedef int (*_fgetf)(struct thread *, int, cap_rights_t *, struct file **);
2166 * Get message queue by giving file slot
2169 _getmq(struct thread *td, int fd, cap_rights_t *rightsp, _fgetf func,
2170 struct file **fpp, struct mqfs_node **ppn, struct mqueue **pmq)
2172 struct mqfs_node *pn;
2175 error = func(td, fd, rightsp, fpp);
2178 if (&mqueueops != (*fpp)->f_ops) {
2182 pn = (*fpp)->f_data;
2191 getmq(struct thread *td, int fd, struct file **fpp, struct mqfs_node **ppn,
2192 struct mqueue **pmq)
2195 return _getmq(td, fd, &cap_event_rights, fget,
2200 getmq_read(struct thread *td, int fd, struct file **fpp,
2201 struct mqfs_node **ppn, struct mqueue **pmq)
2204 return _getmq(td, fd, &cap_read_rights, fget_read,
2209 getmq_write(struct thread *td, int fd, struct file **fpp,
2210 struct mqfs_node **ppn, struct mqueue **pmq)
2213 return _getmq(td, fd, &cap_write_rights, fget_write,
2218 kern_kmq_setattr(struct thread *td, int mqd, const struct mq_attr *attr,
2219 struct mq_attr *oattr)
2227 if (attr != NULL && (attr->mq_flags & ~O_NONBLOCK) != 0)
2229 error = getmq(td, mqd, &fp, NULL, &mq);
2232 oattr->mq_maxmsg = mq->mq_maxmsg;
2233 oattr->mq_msgsize = mq->mq_msgsize;
2234 oattr->mq_curmsgs = mq->mq_curmsgs;
2237 oflag = flag = fp->f_flag;
2238 flag &= ~O_NONBLOCK;
2239 flag |= (attr->mq_flags & O_NONBLOCK);
2240 } while (atomic_cmpset_int(&fp->f_flag, oflag, flag) == 0);
2243 oattr->mq_flags = (O_NONBLOCK & oflag);
2249 sys_kmq_setattr(struct thread *td, struct kmq_setattr_args *uap)
2251 struct mq_attr attr, oattr;
2254 if (uap->attr != NULL) {
2255 error = copyin(uap->attr, &attr, sizeof(attr));
2259 error = kern_kmq_setattr(td, uap->mqd, uap->attr != NULL ? &attr : NULL,
2261 if (error == 0 && uap->oattr != NULL) {
2262 bzero(oattr.__reserved, sizeof(oattr.__reserved));
2263 error = copyout(&oattr, uap->oattr, sizeof(oattr));
2269 sys_kmq_timedreceive(struct thread *td, struct kmq_timedreceive_args *uap)
2273 struct timespec *abs_timeout, ets;
2277 AUDIT_ARG_FD(uap->mqd);
2278 error = getmq_read(td, uap->mqd, &fp, NULL, &mq);
2281 if (uap->abs_timeout != NULL) {
2282 error = copyin(uap->abs_timeout, &ets, sizeof(ets));
2288 waitok = !(fp->f_flag & O_NONBLOCK);
2289 error = mqueue_receive(mq, uap->msg_ptr, uap->msg_len,
2290 uap->msg_prio, waitok, abs_timeout);
2297 sys_kmq_timedsend(struct thread *td, struct kmq_timedsend_args *uap)
2301 struct timespec *abs_timeout, ets;
2304 AUDIT_ARG_FD(uap->mqd);
2305 error = getmq_write(td, uap->mqd, &fp, NULL, &mq);
2308 if (uap->abs_timeout != NULL) {
2309 error = copyin(uap->abs_timeout, &ets, sizeof(ets));
2315 waitok = !(fp->f_flag & O_NONBLOCK);
2316 error = mqueue_send(mq, uap->msg_ptr, uap->msg_len,
2317 uap->msg_prio, waitok, abs_timeout);
2324 kern_kmq_notify(struct thread *td, int mqd, struct sigevent *sigev)
2326 struct filedesc *fdp;
2329 struct file *fp, *fp2;
2330 struct mqueue_notifier *nt, *newnt = NULL;
2334 if (sigev != NULL) {
2335 if (sigev->sigev_notify != SIGEV_SIGNAL &&
2336 sigev->sigev_notify != SIGEV_THREAD_ID &&
2337 sigev->sigev_notify != SIGEV_NONE)
2339 if ((sigev->sigev_notify == SIGEV_SIGNAL ||
2340 sigev->sigev_notify == SIGEV_THREAD_ID) &&
2341 !_SIG_VALID(sigev->sigev_signo))
2345 fdp = td->td_proc->p_fd;
2346 error = getmq(td, mqd, &fp, NULL, &mq);
2350 FILEDESC_SLOCK(fdp);
2351 fp2 = fget_locked(fdp, mqd);
2353 FILEDESC_SUNLOCK(fdp);
2358 error = cap_check(cap_rights(fdp, mqd), &cap_event_rights);
2360 FILEDESC_SUNLOCK(fdp);
2365 FILEDESC_SUNLOCK(fdp);
2369 mtx_lock(&mq->mq_mutex);
2370 FILEDESC_SUNLOCK(fdp);
2371 if (sigev != NULL) {
2372 if (mq->mq_notifier != NULL) {
2376 nt = notifier_search(p, mqd);
2378 if (newnt == NULL) {
2380 mtx_unlock(&mq->mq_mutex);
2381 newnt = notifier_alloc();
2387 sigqueue_take(&nt->nt_ksi);
2388 if (newnt != NULL) {
2389 notifier_free(newnt);
2395 ksiginfo_init(&nt->nt_ksi);
2396 nt->nt_ksi.ksi_flags |= KSI_INS | KSI_EXT;
2397 nt->nt_ksi.ksi_code = SI_MESGQ;
2399 nt->nt_ksi.ksi_mqd = mqd;
2400 notifier_insert(p, nt);
2402 nt->nt_sigev = *sigev;
2403 mq->mq_notifier = nt;
2406 * if there is no receivers and message queue
2407 * is not empty, we should send notification
2408 * as soon as possible.
2410 if (mq->mq_receivers == 0 &&
2411 !TAILQ_EMPTY(&mq->mq_msgq))
2412 mqueue_send_notification(mq);
2415 notifier_remove(p, mq, mqd);
2417 mtx_unlock(&mq->mq_mutex);
2422 notifier_free(newnt);
2427 sys_kmq_notify(struct thread *td, struct kmq_notify_args *uap)
2429 struct sigevent ev, *evp;
2432 if (uap->sigev == NULL) {
2435 error = copyin(uap->sigev, &ev, sizeof(ev));
2440 return (kern_kmq_notify(td, uap->mqd, evp));
2444 mqueue_fdclose(struct thread *td, int fd, struct file *fp)
2448 struct filedesc *fdp;
2450 fdp = td->td_proc->p_fd;
2451 FILEDESC_LOCK_ASSERT(fdp);
2454 if (fp->f_ops == &mqueueops) {
2456 mtx_lock(&mq->mq_mutex);
2457 notifier_remove(td->td_proc, mq, fd);
2459 /* have to wakeup thread in same process */
2460 if (mq->mq_flags & MQ_RSEL) {
2461 mq->mq_flags &= ~MQ_RSEL;
2462 selwakeup(&mq->mq_rsel);
2464 if (mq->mq_flags & MQ_WSEL) {
2465 mq->mq_flags &= ~MQ_WSEL;
2466 selwakeup(&mq->mq_wsel);
2468 mtx_unlock(&mq->mq_mutex);
2473 mq_proc_exit(void *arg __unused, struct proc *p)
2475 struct filedesc *fdp;
2481 FILEDESC_SLOCK(fdp);
2482 for (i = 0; i < fdp->fd_nfiles; ++i) {
2483 fp = fget_locked(fdp, i);
2484 if (fp != NULL && fp->f_ops == &mqueueops) {
2486 mtx_lock(&mq->mq_mutex);
2487 notifier_remove(p, FPTOMQ(fp), i);
2488 mtx_unlock(&mq->mq_mutex);
2491 FILEDESC_SUNLOCK(fdp);
2492 KASSERT(LIST_EMPTY(&p->p_mqnotifier), ("mq notifiers left"));
2496 mqf_poll(struct file *fp, int events, struct ucred *active_cred,
2499 struct mqueue *mq = FPTOMQ(fp);
2502 mtx_lock(&mq->mq_mutex);
2503 if (events & (POLLIN | POLLRDNORM)) {
2504 if (mq->mq_curmsgs) {
2505 revents |= events & (POLLIN | POLLRDNORM);
2507 mq->mq_flags |= MQ_RSEL;
2508 selrecord(td, &mq->mq_rsel);
2511 if (events & POLLOUT) {
2512 if (mq->mq_curmsgs < mq->mq_maxmsg)
2515 mq->mq_flags |= MQ_WSEL;
2516 selrecord(td, &mq->mq_wsel);
2519 mtx_unlock(&mq->mq_mutex);
2524 mqf_close(struct file *fp, struct thread *td)
2526 struct mqfs_node *pn;
2528 fp->f_ops = &badfileops;
2531 sx_xlock(&mqfs_data.mi_lock);
2533 sx_xunlock(&mqfs_data.mi_lock);
2538 mqf_stat(struct file *fp, struct stat *st, struct ucred *active_cred,
2541 struct mqfs_node *pn = fp->f_data;
2543 bzero(st, sizeof *st);
2544 sx_xlock(&mqfs_data.mi_lock);
2545 st->st_atim = pn->mn_atime;
2546 st->st_mtim = pn->mn_mtime;
2547 st->st_ctim = pn->mn_ctime;
2548 st->st_birthtim = pn->mn_birth;
2549 st->st_uid = pn->mn_uid;
2550 st->st_gid = pn->mn_gid;
2551 st->st_mode = S_IFIFO | pn->mn_mode;
2552 sx_xunlock(&mqfs_data.mi_lock);
2557 mqf_chmod(struct file *fp, mode_t mode, struct ucred *active_cred,
2560 struct mqfs_node *pn;
2565 sx_xlock(&mqfs_data.mi_lock);
2566 error = vaccess(VREG, pn->mn_mode, pn->mn_uid, pn->mn_gid, VADMIN,
2570 pn->mn_mode = mode & ACCESSPERMS;
2572 sx_xunlock(&mqfs_data.mi_lock);
2577 mqf_chown(struct file *fp, uid_t uid, gid_t gid, struct ucred *active_cred,
2580 struct mqfs_node *pn;
2585 sx_xlock(&mqfs_data.mi_lock);
2586 if (uid == (uid_t)-1)
2588 if (gid == (gid_t)-1)
2590 if (((uid != pn->mn_uid && uid != active_cred->cr_uid) ||
2591 (gid != pn->mn_gid && !groupmember(gid, active_cred))) &&
2592 (error = priv_check_cred(active_cred, PRIV_VFS_CHOWN)))
2597 sx_xunlock(&mqfs_data.mi_lock);
2602 mqf_kqfilter(struct file *fp, struct knote *kn)
2604 struct mqueue *mq = FPTOMQ(fp);
2607 if (kn->kn_filter == EVFILT_READ) {
2608 kn->kn_fop = &mq_rfiltops;
2609 knlist_add(&mq->mq_rsel.si_note, kn, 0);
2610 } else if (kn->kn_filter == EVFILT_WRITE) {
2611 kn->kn_fop = &mq_wfiltops;
2612 knlist_add(&mq->mq_wsel.si_note, kn, 0);
2619 filt_mqdetach(struct knote *kn)
2621 struct mqueue *mq = FPTOMQ(kn->kn_fp);
2623 if (kn->kn_filter == EVFILT_READ)
2624 knlist_remove(&mq->mq_rsel.si_note, kn, 0);
2625 else if (kn->kn_filter == EVFILT_WRITE)
2626 knlist_remove(&mq->mq_wsel.si_note, kn, 0);
2628 panic("filt_mqdetach");
2632 filt_mqread(struct knote *kn, long hint)
2634 struct mqueue *mq = FPTOMQ(kn->kn_fp);
2636 mtx_assert(&mq->mq_mutex, MA_OWNED);
2637 return (mq->mq_curmsgs != 0);
2641 filt_mqwrite(struct knote *kn, long hint)
2643 struct mqueue *mq = FPTOMQ(kn->kn_fp);
2645 mtx_assert(&mq->mq_mutex, MA_OWNED);
2646 return (mq->mq_curmsgs < mq->mq_maxmsg);
2650 mqf_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
2653 kif->kf_type = KF_TYPE_MQUEUE;
2657 static struct fileops mqueueops = {
2658 .fo_read = invfo_rdwr,
2659 .fo_write = invfo_rdwr,
2660 .fo_truncate = invfo_truncate,
2661 .fo_ioctl = invfo_ioctl,
2662 .fo_poll = mqf_poll,
2663 .fo_kqfilter = mqf_kqfilter,
2664 .fo_stat = mqf_stat,
2665 .fo_close = mqf_close,
2666 .fo_chmod = mqf_chmod,
2667 .fo_chown = mqf_chown,
2668 .fo_sendfile = invfo_sendfile,
2669 .fo_fill_kinfo = mqf_fill_kinfo,
2670 .fo_flags = DFLAG_PASSABLE,
2673 static struct vop_vector mqfs_vnodeops = {
2674 .vop_default = &default_vnodeops,
2675 .vop_access = mqfs_access,
2676 .vop_cachedlookup = mqfs_lookup,
2677 .vop_lookup = vfs_cache_lookup,
2678 .vop_reclaim = mqfs_reclaim,
2679 .vop_create = mqfs_create,
2680 .vop_remove = mqfs_remove,
2681 .vop_inactive = mqfs_inactive,
2682 .vop_open = mqfs_open,
2683 .vop_close = mqfs_close,
2684 .vop_getattr = mqfs_getattr,
2685 .vop_setattr = mqfs_setattr,
2686 .vop_read = mqfs_read,
2687 .vop_write = VOP_EOPNOTSUPP,
2688 .vop_readdir = mqfs_readdir,
2689 .vop_mkdir = VOP_EOPNOTSUPP,
2690 .vop_rmdir = VOP_EOPNOTSUPP
2692 VFS_VOP_VECTOR_REGISTER(mqfs_vnodeops);
2694 static struct vfsops mqfs_vfsops = {
2695 .vfs_init = mqfs_init,
2696 .vfs_uninit = mqfs_uninit,
2697 .vfs_mount = mqfs_mount,
2698 .vfs_unmount = mqfs_unmount,
2699 .vfs_root = mqfs_root,
2700 .vfs_statfs = mqfs_statfs,
2703 static struct vfsconf mqueuefs_vfsconf = {
2704 .vfc_version = VFS_VERSION,
2705 .vfc_name = "mqueuefs",
2706 .vfc_vfsops = &mqfs_vfsops,
2708 .vfc_flags = VFCF_SYNTHETIC
2711 static struct syscall_helper_data mq_syscalls[] = {
2712 SYSCALL_INIT_HELPER(kmq_open),
2713 SYSCALL_INIT_HELPER_F(kmq_setattr, SYF_CAPENABLED),
2714 SYSCALL_INIT_HELPER_F(kmq_timedsend, SYF_CAPENABLED),
2715 SYSCALL_INIT_HELPER_F(kmq_timedreceive, SYF_CAPENABLED),
2716 SYSCALL_INIT_HELPER_F(kmq_notify, SYF_CAPENABLED),
2717 SYSCALL_INIT_HELPER(kmq_unlink),
2721 #ifdef COMPAT_FREEBSD32
2722 #include <compat/freebsd32/freebsd32.h>
2723 #include <compat/freebsd32/freebsd32_proto.h>
2724 #include <compat/freebsd32/freebsd32_signal.h>
2725 #include <compat/freebsd32/freebsd32_syscall.h>
2726 #include <compat/freebsd32/freebsd32_util.h>
2729 mq_attr_from32(const struct mq_attr32 *from, struct mq_attr *to)
2732 to->mq_flags = from->mq_flags;
2733 to->mq_maxmsg = from->mq_maxmsg;
2734 to->mq_msgsize = from->mq_msgsize;
2735 to->mq_curmsgs = from->mq_curmsgs;
2739 mq_attr_to32(const struct mq_attr *from, struct mq_attr32 *to)
2742 to->mq_flags = from->mq_flags;
2743 to->mq_maxmsg = from->mq_maxmsg;
2744 to->mq_msgsize = from->mq_msgsize;
2745 to->mq_curmsgs = from->mq_curmsgs;
2749 freebsd32_kmq_open(struct thread *td, struct freebsd32_kmq_open_args *uap)
2751 struct mq_attr attr;
2752 struct mq_attr32 attr32;
2755 if ((uap->flags & O_ACCMODE) == O_ACCMODE || uap->flags & O_EXEC)
2757 flags = FFLAGS(uap->flags);
2758 if ((flags & O_CREAT) != 0 && uap->attr != NULL) {
2759 error = copyin(uap->attr, &attr32, sizeof(attr32));
2762 mq_attr_from32(&attr32, &attr);
2764 return (kern_kmq_open(td, uap->path, flags, uap->mode,
2765 uap->attr != NULL ? &attr : NULL));
2769 freebsd32_kmq_setattr(struct thread *td, struct freebsd32_kmq_setattr_args *uap)
2771 struct mq_attr attr, oattr;
2772 struct mq_attr32 attr32, oattr32;
2775 if (uap->attr != NULL) {
2776 error = copyin(uap->attr, &attr32, sizeof(attr32));
2779 mq_attr_from32(&attr32, &attr);
2781 error = kern_kmq_setattr(td, uap->mqd, uap->attr != NULL ? &attr : NULL,
2783 if (error == 0 && uap->oattr != NULL) {
2784 mq_attr_to32(&oattr, &oattr32);
2785 bzero(oattr32.__reserved, sizeof(oattr32.__reserved));
2786 error = copyout(&oattr32, uap->oattr, sizeof(oattr32));
2792 freebsd32_kmq_timedsend(struct thread *td,
2793 struct freebsd32_kmq_timedsend_args *uap)
2797 struct timespec32 ets32;
2798 struct timespec *abs_timeout, ets;
2802 AUDIT_ARG_FD(uap->mqd);
2803 error = getmq_write(td, uap->mqd, &fp, NULL, &mq);
2806 if (uap->abs_timeout != NULL) {
2807 error = copyin(uap->abs_timeout, &ets32, sizeof(ets32));
2810 CP(ets32, ets, tv_sec);
2811 CP(ets32, ets, tv_nsec);
2815 waitok = !(fp->f_flag & O_NONBLOCK);
2816 error = mqueue_send(mq, uap->msg_ptr, uap->msg_len,
2817 uap->msg_prio, waitok, abs_timeout);
2824 freebsd32_kmq_timedreceive(struct thread *td,
2825 struct freebsd32_kmq_timedreceive_args *uap)
2829 struct timespec32 ets32;
2830 struct timespec *abs_timeout, ets;
2833 AUDIT_ARG_FD(uap->mqd);
2834 error = getmq_read(td, uap->mqd, &fp, NULL, &mq);
2837 if (uap->abs_timeout != NULL) {
2838 error = copyin(uap->abs_timeout, &ets32, sizeof(ets32));
2841 CP(ets32, ets, tv_sec);
2842 CP(ets32, ets, tv_nsec);
2846 waitok = !(fp->f_flag & O_NONBLOCK);
2847 error = mqueue_receive(mq, uap->msg_ptr, uap->msg_len,
2848 uap->msg_prio, waitok, abs_timeout);
2855 freebsd32_kmq_notify(struct thread *td, struct freebsd32_kmq_notify_args *uap)
2857 struct sigevent ev, *evp;
2858 struct sigevent32 ev32;
2861 if (uap->sigev == NULL) {
2864 error = copyin(uap->sigev, &ev32, sizeof(ev32));
2867 error = convert_sigevent32(&ev32, &ev);
2872 return (kern_kmq_notify(td, uap->mqd, evp));
2875 static struct syscall_helper_data mq32_syscalls[] = {
2876 SYSCALL32_INIT_HELPER(freebsd32_kmq_open),
2877 SYSCALL32_INIT_HELPER_F(freebsd32_kmq_setattr, SYF_CAPENABLED),
2878 SYSCALL32_INIT_HELPER_F(freebsd32_kmq_timedsend, SYF_CAPENABLED),
2879 SYSCALL32_INIT_HELPER_F(freebsd32_kmq_timedreceive, SYF_CAPENABLED),
2880 SYSCALL32_INIT_HELPER_F(freebsd32_kmq_notify, SYF_CAPENABLED),
2881 SYSCALL32_INIT_HELPER_COMPAT(kmq_unlink),
2891 error = syscall_helper_register(mq_syscalls, SY_THR_STATIC_KLD);
2894 #ifdef COMPAT_FREEBSD32
2895 error = syscall32_helper_register(mq32_syscalls, SY_THR_STATIC_KLD);
2906 #ifdef COMPAT_FREEBSD32
2907 syscall32_helper_unregister(mq32_syscalls);
2909 syscall_helper_unregister(mq_syscalls);
2914 mq_modload(struct module *module, int cmd, void *arg)
2918 error = vfs_modevent(module, cmd, arg);
2937 static moduledata_t mqueuefs_mod = {
2942 DECLARE_MODULE(mqueuefs, mqueuefs_mod, SI_SUB_VFS, SI_ORDER_MIDDLE);
2943 MODULE_VERSION(mqueuefs, 1);