17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate * with the License.
87c478bd9Sstevel@tonic-gate *
97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate * and limitations under the License.
137c478bd9Sstevel@tonic-gate *
147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate *
207c478bd9Sstevel@tonic-gate * CDDL HEADER END
217c478bd9Sstevel@tonic-gate */
227c478bd9Sstevel@tonic-gate /*
237c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate #include <unistd.h>
287c478bd9Sstevel@tonic-gate #include <stdlib.h>
297c478bd9Sstevel@tonic-gate #include <string.h>
307c478bd9Sstevel@tonic-gate #include <strings.h>
317c478bd9Sstevel@tonic-gate #include <stdio.h>
327c478bd9Sstevel@tonic-gate #include <limits.h>
337c478bd9Sstevel@tonic-gate #include <thread.h>
347c478bd9Sstevel@tonic-gate #include <wait.h>
357c478bd9Sstevel@tonic-gate #include <synch.h>
367c478bd9Sstevel@tonic-gate #include <errno.h>
377c478bd9Sstevel@tonic-gate #include <locale.h>
387c478bd9Sstevel@tonic-gate #include <sys/stat.h>
397c478bd9Sstevel@tonic-gate #include <sys/mnttab.h>
407c478bd9Sstevel@tonic-gate #include <sys/sunddi.h>
417c478bd9Sstevel@tonic-gate #include <sys/modctl.h>
427c478bd9Sstevel@tonic-gate #include <sys/sysevent.h>
437c478bd9Sstevel@tonic-gate #include <sys/sysevent_impl.h>
447c478bd9Sstevel@tonic-gate
457c478bd9Sstevel@tonic-gate #include <libsysevent.h>
467c478bd9Sstevel@tonic-gate
477c478bd9Sstevel@tonic-gate #include "message_reg_mod.h"
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate /*
507c478bd9Sstevel@tonic-gate * SLM for sysevent event subscribers
517c478bd9Sstevel@tonic-gate */
527c478bd9Sstevel@tonic-gate
537c478bd9Sstevel@tonic-gate extern char *root_dir;
547c478bd9Sstevel@tonic-gate extern void syseventd_print(int level, char *format, ...);
557c478bd9Sstevel@tonic-gate extern void syseventd_err_print(char *format, ...);
567c478bd9Sstevel@tonic-gate
577c478bd9Sstevel@tonic-gate sysevent_handle_t *sysevent_hp;
587c478bd9Sstevel@tonic-gate
597c478bd9Sstevel@tonic-gate typedef struct ev_queue {
607c478bd9Sstevel@tonic-gate struct ev_queue *evq_next;
617c478bd9Sstevel@tonic-gate sysevent_t *evq_ev;
627c478bd9Sstevel@tonic-gate } ev_queue_t;
637c478bd9Sstevel@tonic-gate
647c478bd9Sstevel@tonic-gate static mutex_t evq_lock;
657c478bd9Sstevel@tonic-gate static cond_t evq_cv;
667c478bd9Sstevel@tonic-gate static ev_queue_t *event_q = NULL;
677c478bd9Sstevel@tonic-gate static int cleanup;
687c478bd9Sstevel@tonic-gate static thread_t deliver_thr_id;
697c478bd9Sstevel@tonic-gate
707c478bd9Sstevel@tonic-gate static int
init_channel()717c478bd9Sstevel@tonic-gate init_channel()
727c478bd9Sstevel@tonic-gate {
737c478bd9Sstevel@tonic-gate /*
747c478bd9Sstevel@tonic-gate * This functionality is not supported in the mini-root
757c478bd9Sstevel@tonic-gate * environment, ie install. If root_dir is set, implying
767c478bd9Sstevel@tonic-gate * install, we quietly fail.
777c478bd9Sstevel@tonic-gate */
787c478bd9Sstevel@tonic-gate if (strcmp(root_dir, "") != 0) {
797c478bd9Sstevel@tonic-gate return (EACCES);
807c478bd9Sstevel@tonic-gate }
817c478bd9Sstevel@tonic-gate
827c478bd9Sstevel@tonic-gate /*
837c478bd9Sstevel@tonic-gate * Initialize the private sysevent handle
847c478bd9Sstevel@tonic-gate */
857c478bd9Sstevel@tonic-gate sysevent_hp = sysevent_open_channel(SYSEVENTD_CHAN);
867c478bd9Sstevel@tonic-gate if (sysevent_hp == NULL) {
877c478bd9Sstevel@tonic-gate if (errno == EACCES) {
887c478bd9Sstevel@tonic-gate syseventd_print(3, "sysevent_reg_mod: "
897c478bd9Sstevel@tonic-gate "sysevent_open_channel failed with %s init "
907c478bd9Sstevel@tonic-gate "deferred\n", strerror(errno));
917c478bd9Sstevel@tonic-gate return (errno);
927c478bd9Sstevel@tonic-gate } else {
937c478bd9Sstevel@tonic-gate syseventd_err_print(INIT_SUB_OPEN_CHAN_ERR,
947c478bd9Sstevel@tonic-gate strerror(errno));
957c478bd9Sstevel@tonic-gate return (errno);
967c478bd9Sstevel@tonic-gate }
977c478bd9Sstevel@tonic-gate }
987c478bd9Sstevel@tonic-gate
997c478bd9Sstevel@tonic-gate if (sysevent_bind_publisher(sysevent_hp) != 0) {
1007c478bd9Sstevel@tonic-gate /*
1017c478bd9Sstevel@tonic-gate * Only one publisher allowed on the syseventd channel,
1027c478bd9Sstevel@tonic-gate * cleanup previously allocated syseventd channel publishers
1037c478bd9Sstevel@tonic-gate */
1047c478bd9Sstevel@tonic-gate if (errno == EBUSY) {
1057c478bd9Sstevel@tonic-gate sysevent_cleanup_publishers(sysevent_hp);
1067c478bd9Sstevel@tonic-gate if (sysevent_bind_publisher(sysevent_hp) == 0)
1077c478bd9Sstevel@tonic-gate return (0);
1087c478bd9Sstevel@tonic-gate }
1097c478bd9Sstevel@tonic-gate
1107c478bd9Sstevel@tonic-gate syseventd_err_print(INIT_SUB_BIND_PUB_ERR,
1117c478bd9Sstevel@tonic-gate strerror(errno));
1127c478bd9Sstevel@tonic-gate sysevent_close_channel(sysevent_hp);
1137c478bd9Sstevel@tonic-gate sysevent_hp = NULL;
1147c478bd9Sstevel@tonic-gate return (errno);
1157c478bd9Sstevel@tonic-gate }
1167c478bd9Sstevel@tonic-gate
1177c478bd9Sstevel@tonic-gate return (0);
1187c478bd9Sstevel@tonic-gate }
1197c478bd9Sstevel@tonic-gate
1207c478bd9Sstevel@tonic-gate static int
deliver_event(sysevent_t * ev,int flag)1217c478bd9Sstevel@tonic-gate deliver_event(sysevent_t *ev, int flag)
1227c478bd9Sstevel@tonic-gate {
1237c478bd9Sstevel@tonic-gate int ret, ev_size;
1247c478bd9Sstevel@tonic-gate ev_queue_t *new_evq, *tmp_evq;
1257c478bd9Sstevel@tonic-gate
1267c478bd9Sstevel@tonic-gate /* Not initialized */
1277c478bd9Sstevel@tonic-gate if (sysevent_hp == NULL) {
1287c478bd9Sstevel@tonic-gate
1297c478bd9Sstevel@tonic-gate ret = init_channel();
1307c478bd9Sstevel@tonic-gate if (ret != 0) {
1317c478bd9Sstevel@tonic-gate if (ret == EBUSY && flag != SE_NO_RETRY) {
1327c478bd9Sstevel@tonic-gate return (EAGAIN);
1337c478bd9Sstevel@tonic-gate } else if (ret == EACCES) {
1347c478bd9Sstevel@tonic-gate return (0);
1357c478bd9Sstevel@tonic-gate } else {
1367c478bd9Sstevel@tonic-gate syseventd_err_print(INIT_SUB_OPEN_CHAN_ERR,
1377c478bd9Sstevel@tonic-gate strerror(ret));
1387c478bd9Sstevel@tonic-gate return (0);
1397c478bd9Sstevel@tonic-gate }
1407c478bd9Sstevel@tonic-gate }
1417c478bd9Sstevel@tonic-gate /* Check for stale syseventd subscribers */
1427c478bd9Sstevel@tonic-gate sysevent_cleanup_subscribers(sysevent_hp);
1437c478bd9Sstevel@tonic-gate syseventd_print(3, "sysevent_reg_mod: init successful");
1447c478bd9Sstevel@tonic-gate }
1457c478bd9Sstevel@tonic-gate
1467c478bd9Sstevel@tonic-gate /* Queue event for delivery to all subscribers */
1477c478bd9Sstevel@tonic-gate new_evq = (ev_queue_t *)calloc(1, sizeof (ev_queue_t));
1487c478bd9Sstevel@tonic-gate if (new_evq == NULL) {
1497c478bd9Sstevel@tonic-gate return (EAGAIN);
1507c478bd9Sstevel@tonic-gate }
1517c478bd9Sstevel@tonic-gate ev_size = sysevent_get_size(ev);
1527c478bd9Sstevel@tonic-gate new_evq->evq_ev = (sysevent_t *)malloc(ev_size);
1537c478bd9Sstevel@tonic-gate if (new_evq->evq_ev == NULL) {
1547c478bd9Sstevel@tonic-gate free(new_evq);
1557c478bd9Sstevel@tonic-gate return (EAGAIN);
1567c478bd9Sstevel@tonic-gate }
1577c478bd9Sstevel@tonic-gate bcopy(ev, new_evq->evq_ev, ev_size);
1587c478bd9Sstevel@tonic-gate
1597c478bd9Sstevel@tonic-gate (void) mutex_lock(&evq_lock);
1607c478bd9Sstevel@tonic-gate if (event_q == NULL) {
1617c478bd9Sstevel@tonic-gate event_q = new_evq;
1627c478bd9Sstevel@tonic-gate } else {
1637c478bd9Sstevel@tonic-gate tmp_evq = event_q;
1647c478bd9Sstevel@tonic-gate while (tmp_evq->evq_next != NULL)
1657c478bd9Sstevel@tonic-gate tmp_evq = tmp_evq->evq_next;
1667c478bd9Sstevel@tonic-gate tmp_evq->evq_next = new_evq;
1677c478bd9Sstevel@tonic-gate }
1687c478bd9Sstevel@tonic-gate syseventd_print(3, "sysevent_reg_mod: queue event 0X%llx\n",
1697c478bd9Sstevel@tonic-gate sysevent_get_seq(ev));
1707c478bd9Sstevel@tonic-gate
1717c478bd9Sstevel@tonic-gate (void) cond_signal(&evq_cv);
1727c478bd9Sstevel@tonic-gate (void) mutex_unlock(&evq_lock);
1737c478bd9Sstevel@tonic-gate
1747c478bd9Sstevel@tonic-gate return (0);
1757c478bd9Sstevel@tonic-gate }
1767c478bd9Sstevel@tonic-gate
177*5b784b07SToomas Soome void *
subscriber_deliver_thr(void * arg __unused)178*5b784b07SToomas Soome subscriber_deliver_thr(void *arg __unused)
1797c478bd9Sstevel@tonic-gate {
1807c478bd9Sstevel@tonic-gate ev_queue_t *evqp;
1817c478bd9Sstevel@tonic-gate
1827c478bd9Sstevel@tonic-gate (void) mutex_lock(&evq_lock);
1837c478bd9Sstevel@tonic-gate for (;;) {
1847c478bd9Sstevel@tonic-gate while (event_q == NULL && cleanup == 0) {
1857c478bd9Sstevel@tonic-gate (void) cond_wait(&evq_cv, &evq_lock);
1867c478bd9Sstevel@tonic-gate }
1877c478bd9Sstevel@tonic-gate
1887c478bd9Sstevel@tonic-gate /* Send events on to all current subscribers */
1897c478bd9Sstevel@tonic-gate evqp = event_q;
1907c478bd9Sstevel@tonic-gate while (evqp) {
1917c478bd9Sstevel@tonic-gate (void) mutex_unlock(&evq_lock);
1927c478bd9Sstevel@tonic-gate syseventd_print(3, "sysevent_reg_mod: sending event "
1937c478bd9Sstevel@tonic-gate "0X%llx\n", sysevent_get_seq(evqp->evq_ev));
1947c478bd9Sstevel@tonic-gate if (sysevent_send_event(sysevent_hp,
1957c478bd9Sstevel@tonic-gate evqp->evq_ev) != 0) {
1967c478bd9Sstevel@tonic-gate syseventd_print(3, "sysevent_reg_mod: "
1977c478bd9Sstevel@tonic-gate "failed to send event\n");
1987c478bd9Sstevel@tonic-gate }
1997c478bd9Sstevel@tonic-gate syseventd_print(3, "sysevent_reg_mod: event sent "
2007c478bd9Sstevel@tonic-gate "0X%llx\n", sysevent_get_seq(evqp->evq_ev));
2017c478bd9Sstevel@tonic-gate (void) mutex_lock(&evq_lock);
2027c478bd9Sstevel@tonic-gate event_q = evqp->evq_next;
2037c478bd9Sstevel@tonic-gate free(evqp->evq_ev);
2047c478bd9Sstevel@tonic-gate free(evqp);
2057c478bd9Sstevel@tonic-gate evqp = event_q;
2067c478bd9Sstevel@tonic-gate }
2077c478bd9Sstevel@tonic-gate if (cleanup) {
2087c478bd9Sstevel@tonic-gate syseventd_print(3, "sysevent_reg_mod: deliver "
2097c478bd9Sstevel@tonic-gate "thread exiting\n");
2107c478bd9Sstevel@tonic-gate (void) mutex_unlock(&evq_lock);
2117c478bd9Sstevel@tonic-gate (void) thr_exit(NULL);
2127c478bd9Sstevel@tonic-gate /* NOTREACHED */
2137c478bd9Sstevel@tonic-gate }
2147c478bd9Sstevel@tonic-gate }
2157c478bd9Sstevel@tonic-gate
2167c478bd9Sstevel@tonic-gate /* NOTREACHED */
2177c478bd9Sstevel@tonic-gate }
2187c478bd9Sstevel@tonic-gate
2197c478bd9Sstevel@tonic-gate static struct slm_mod_ops sysevent_reg_mod_ops = {
2207c478bd9Sstevel@tonic-gate SE_MAJOR_VERSION, SE_MINOR_VERSION, SE_MAX_RETRY_LIMIT, deliver_event};
2217c478bd9Sstevel@tonic-gate
2227c478bd9Sstevel@tonic-gate struct slm_mod_ops *
slm_init()2237c478bd9Sstevel@tonic-gate slm_init()
2247c478bd9Sstevel@tonic-gate {
2257c478bd9Sstevel@tonic-gate cleanup = 0;
2267c478bd9Sstevel@tonic-gate sysevent_hp = NULL;
2277c478bd9Sstevel@tonic-gate
2287c478bd9Sstevel@tonic-gate (void) init_channel();
2297c478bd9Sstevel@tonic-gate
2307c478bd9Sstevel@tonic-gate (void) mutex_init(&evq_lock, USYNC_THREAD, NULL);
2317c478bd9Sstevel@tonic-gate (void) cond_init(&evq_cv, USYNC_THREAD, NULL);
2327c478bd9Sstevel@tonic-gate
233c7cb3c8bSToomas Soome if (thr_create(NULL, 0, (void *(*)(void *))subscriber_deliver_thr,
2347c478bd9Sstevel@tonic-gate NULL, 0, &deliver_thr_id) != 0) {
2357c478bd9Sstevel@tonic-gate syseventd_err_print(INIT_SUB_THR_CREATE_ERR, strerror(errno));
2367c478bd9Sstevel@tonic-gate return (NULL);
2377c478bd9Sstevel@tonic-gate }
2387c478bd9Sstevel@tonic-gate
2397c478bd9Sstevel@tonic-gate return (&sysevent_reg_mod_ops);
2407c478bd9Sstevel@tonic-gate }
2417c478bd9Sstevel@tonic-gate
2427c478bd9Sstevel@tonic-gate void
slm_fini()2437c478bd9Sstevel@tonic-gate slm_fini()
2447c478bd9Sstevel@tonic-gate {
2457c478bd9Sstevel@tonic-gate (void) mutex_lock(&evq_lock);
2467c478bd9Sstevel@tonic-gate cleanup = 1;
2477c478bd9Sstevel@tonic-gate (void) cond_signal(&evq_cv);
2487c478bd9Sstevel@tonic-gate (void) mutex_unlock(&evq_lock);
2497c478bd9Sstevel@tonic-gate
2507c478bd9Sstevel@tonic-gate /* Wait for delivery threads to exit */
2517c478bd9Sstevel@tonic-gate (void) thr_join(deliver_thr_id, NULL, NULL);
2527c478bd9Sstevel@tonic-gate
2537c478bd9Sstevel@tonic-gate (void) mutex_destroy(&evq_lock);
2547c478bd9Sstevel@tonic-gate (void) cond_destroy(&evq_cv);
2557c478bd9Sstevel@tonic-gate
2567c478bd9Sstevel@tonic-gate sysevent_close_channel(sysevent_hp);
2577c478bd9Sstevel@tonic-gate sysevent_hp = NULL;
2587c478bd9Sstevel@tonic-gate }
259