xref: /titanic_50/usr/src/uts/common/os/log_sysevent.c (revision e5dc7eac9e55f81548c4f12c8a2879d42a35ad84)
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
5e04145d0Seschrock  * Common Development and Distribution License (the "License").
6e04145d0Seschrock  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
217c478bd9Sstevel@tonic-gate /*
22f6e214c7SGavin Maltby  * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
23*e5dc7eacSMarcel Telka  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  */
257c478bd9Sstevel@tonic-gate 
267c478bd9Sstevel@tonic-gate #include <sys/types.h>
277c478bd9Sstevel@tonic-gate #include <sys/errno.h>
287c478bd9Sstevel@tonic-gate #include <sys/stropts.h>
297c478bd9Sstevel@tonic-gate #include <sys/debug.h>
307c478bd9Sstevel@tonic-gate #include <sys/ddi.h>
317c478bd9Sstevel@tonic-gate #include <sys/sunddi.h>
327c478bd9Sstevel@tonic-gate #include <sys/vmem.h>
337c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h>
347c478bd9Sstevel@tonic-gate #include <sys/callb.h>
357c478bd9Sstevel@tonic-gate #include <sys/sysevent.h>
367c478bd9Sstevel@tonic-gate #include <sys/sysevent_impl.h>
377c478bd9Sstevel@tonic-gate #include <sys/modctl.h>
387c478bd9Sstevel@tonic-gate #include <sys/sysmacros.h>
397c478bd9Sstevel@tonic-gate #include <sys/disp.h>
407c478bd9Sstevel@tonic-gate #include <sys/autoconf.h>
417c478bd9Sstevel@tonic-gate #include <sys/atomic.h>
42e04145d0Seschrock #include <sys/sdt.h>
437c478bd9Sstevel@tonic-gate 
447c478bd9Sstevel@tonic-gate /* for doors */
457c478bd9Sstevel@tonic-gate #include <sys/pathname.h>
467c478bd9Sstevel@tonic-gate #include <sys/door.h>
477c478bd9Sstevel@tonic-gate #include <sys/kmem.h>
487c478bd9Sstevel@tonic-gate #include <sys/cpuvar.h>
497c478bd9Sstevel@tonic-gate #include <sys/fs/snode.h>
507c478bd9Sstevel@tonic-gate 
517c478bd9Sstevel@tonic-gate /*
527c478bd9Sstevel@tonic-gate  * log_sysevent.c - Provides the interfaces for kernel event publication
537c478bd9Sstevel@tonic-gate  *			to the sysevent event daemon (syseventd).
547c478bd9Sstevel@tonic-gate  */
557c478bd9Sstevel@tonic-gate 
567c478bd9Sstevel@tonic-gate /*
577c478bd9Sstevel@tonic-gate  * Debug stuff
587c478bd9Sstevel@tonic-gate  */
597c478bd9Sstevel@tonic-gate static int log_event_debug = 0;
607c478bd9Sstevel@tonic-gate #define	LOG_DEBUG(args)  if (log_event_debug) cmn_err args
617c478bd9Sstevel@tonic-gate #ifdef DEBUG
627c478bd9Sstevel@tonic-gate #define	LOG_DEBUG1(args)  if (log_event_debug > 1) cmn_err args
637c478bd9Sstevel@tonic-gate #else
647c478bd9Sstevel@tonic-gate #define	LOG_DEBUG1(args)
657c478bd9Sstevel@tonic-gate #endif
667c478bd9Sstevel@tonic-gate 
677c478bd9Sstevel@tonic-gate /*
687c478bd9Sstevel@tonic-gate  * Local static vars
697c478bd9Sstevel@tonic-gate  */
707c478bd9Sstevel@tonic-gate /* queue of event buffers sent to syseventd */
717c478bd9Sstevel@tonic-gate static log_eventq_t *log_eventq_sent = NULL;
727c478bd9Sstevel@tonic-gate 
737c478bd9Sstevel@tonic-gate /*
747c478bd9Sstevel@tonic-gate  * Count of event buffers in the queue
757c478bd9Sstevel@tonic-gate  */
767c478bd9Sstevel@tonic-gate int log_eventq_cnt = 0;
777c478bd9Sstevel@tonic-gate 
787c478bd9Sstevel@tonic-gate /* queue of event buffers awaiting delivery to syseventd */
797c478bd9Sstevel@tonic-gate static log_eventq_t *log_eventq_head = NULL;
807c478bd9Sstevel@tonic-gate static log_eventq_t *log_eventq_tail = NULL;
817c478bd9Sstevel@tonic-gate static uint64_t kernel_event_id = 0;
827c478bd9Sstevel@tonic-gate static int encoding = NV_ENCODE_NATIVE;
837c478bd9Sstevel@tonic-gate 
847c478bd9Sstevel@tonic-gate /* log event delivery flag */
857c478bd9Sstevel@tonic-gate #define	LOGEVENT_DELIVERY_OK	0	/* OK to deliver event buffers */
867c478bd9Sstevel@tonic-gate #define	LOGEVENT_DELIVERY_CONT	1	/* Continue to deliver event buffers */
877c478bd9Sstevel@tonic-gate #define	LOGEVENT_DELIVERY_HOLD	2	/* Hold delivering of event buffers */
887c478bd9Sstevel@tonic-gate 
897c478bd9Sstevel@tonic-gate /*
907c478bd9Sstevel@tonic-gate  * Tunable maximum event buffer queue size. Size depends on how many events
917c478bd9Sstevel@tonic-gate  * the queue must hold when syseventd is not available, for example during
927c478bd9Sstevel@tonic-gate  * system startup. Experience showed that more than 2000 events could be posted
937c478bd9Sstevel@tonic-gate  * due to correctable memory errors.
947c478bd9Sstevel@tonic-gate  */
957c478bd9Sstevel@tonic-gate int logevent_max_q_sz = 5000;
967c478bd9Sstevel@tonic-gate 
977c478bd9Sstevel@tonic-gate 
987c478bd9Sstevel@tonic-gate static int log_event_delivery = LOGEVENT_DELIVERY_HOLD;
99*e5dc7eacSMarcel Telka static char logevent_door_upcall_filename[MAXPATHLEN];
1007c478bd9Sstevel@tonic-gate 
1017c478bd9Sstevel@tonic-gate static door_handle_t event_door = NULL;		/* Door for upcalls */
102*e5dc7eacSMarcel Telka static kmutex_t event_door_mutex;		/* To protect event_door */
1037c478bd9Sstevel@tonic-gate 
1047c478bd9Sstevel@tonic-gate /*
1057c478bd9Sstevel@tonic-gate  * async thread-related variables
1067c478bd9Sstevel@tonic-gate  *
1077c478bd9Sstevel@tonic-gate  * eventq_head_mutex - synchronizes access to the kernel event queue
1087c478bd9Sstevel@tonic-gate  *
1097c478bd9Sstevel@tonic-gate  * eventq_sent_mutex - synchronizes access to the queue of event sents to
1107c478bd9Sstevel@tonic-gate  *			userlevel
1117c478bd9Sstevel@tonic-gate  *
1127c478bd9Sstevel@tonic-gate  * log_event_cv - condition variable signaled when an event has arrived or
1137c478bd9Sstevel@tonic-gate  *			userlevel ready to process event buffers
1147c478bd9Sstevel@tonic-gate  *
1157c478bd9Sstevel@tonic-gate  * async_thread - asynchronous event delivery thread to userlevel daemon.
1167c478bd9Sstevel@tonic-gate  *
1177c478bd9Sstevel@tonic-gate  * sysevent_upcall_status - status of the door upcall link
1187c478bd9Sstevel@tonic-gate  */
1197c478bd9Sstevel@tonic-gate static kmutex_t eventq_head_mutex;
1207c478bd9Sstevel@tonic-gate static kmutex_t eventq_sent_mutex;
1217c478bd9Sstevel@tonic-gate static kcondvar_t log_event_cv;
1227c478bd9Sstevel@tonic-gate static kthread_id_t async_thread = NULL;
1237c478bd9Sstevel@tonic-gate 
1247c478bd9Sstevel@tonic-gate static kmutex_t event_qfull_mutex;
1257c478bd9Sstevel@tonic-gate static kcondvar_t event_qfull_cv;
1267c478bd9Sstevel@tonic-gate static int event_qfull_blocked = 0;
1277c478bd9Sstevel@tonic-gate 
1287c478bd9Sstevel@tonic-gate static int sysevent_upcall_status = -1;
1297c478bd9Sstevel@tonic-gate static kmutex_t registered_channel_mutex;
1307c478bd9Sstevel@tonic-gate 
1317c478bd9Sstevel@tonic-gate /*
1327c478bd9Sstevel@tonic-gate  * Indicates the syseventd daemon has begun taking events
1337c478bd9Sstevel@tonic-gate  */
1347c478bd9Sstevel@tonic-gate int sysevent_daemon_init = 0;
1357c478bd9Sstevel@tonic-gate 
1367c478bd9Sstevel@tonic-gate /*
1377c478bd9Sstevel@tonic-gate  * Back-off delay when door_ki_upcall returns EAGAIN.  Typically
1387c478bd9Sstevel@tonic-gate  * caused by the server process doing a forkall().  Since all threads
1397c478bd9Sstevel@tonic-gate  * but the thread actually doing the forkall() need to be quiesced,
1407c478bd9Sstevel@tonic-gate  * the fork may take some time.  The min/max pause are in units
1417c478bd9Sstevel@tonic-gate  * of clock ticks.
1427c478bd9Sstevel@tonic-gate  */
1437c478bd9Sstevel@tonic-gate #define	LOG_EVENT_MIN_PAUSE	8
1447c478bd9Sstevel@tonic-gate #define	LOG_EVENT_MAX_PAUSE	128
1457c478bd9Sstevel@tonic-gate 
1467c478bd9Sstevel@tonic-gate static kmutex_t	event_pause_mutex;
1477c478bd9Sstevel@tonic-gate static kcondvar_t event_pause_cv;
1487c478bd9Sstevel@tonic-gate static int event_pause_state = 0;
1497c478bd9Sstevel@tonic-gate 
1507c478bd9Sstevel@tonic-gate /*ARGSUSED*/
1517c478bd9Sstevel@tonic-gate static void
log_event_busy_timeout(void * arg)1527c478bd9Sstevel@tonic-gate log_event_busy_timeout(void *arg)
1537c478bd9Sstevel@tonic-gate {
1547c478bd9Sstevel@tonic-gate 	mutex_enter(&event_pause_mutex);
1557c478bd9Sstevel@tonic-gate 	event_pause_state = 0;
1567c478bd9Sstevel@tonic-gate 	cv_signal(&event_pause_cv);
1577c478bd9Sstevel@tonic-gate 	mutex_exit(&event_pause_mutex);
1587c478bd9Sstevel@tonic-gate }
1597c478bd9Sstevel@tonic-gate 
1607c478bd9Sstevel@tonic-gate static void
log_event_pause(int nticks)1617c478bd9Sstevel@tonic-gate log_event_pause(int nticks)
1627c478bd9Sstevel@tonic-gate {
1637c478bd9Sstevel@tonic-gate 	timeout_id_t id;
1647c478bd9Sstevel@tonic-gate 
1657c478bd9Sstevel@tonic-gate 	/*
1667c478bd9Sstevel@tonic-gate 	 * Only one use of log_event_pause at a time
1677c478bd9Sstevel@tonic-gate 	 */
1687c478bd9Sstevel@tonic-gate 	ASSERT(event_pause_state == 0);
1697c478bd9Sstevel@tonic-gate 
1707c478bd9Sstevel@tonic-gate 	event_pause_state = 1;
1717c478bd9Sstevel@tonic-gate 	id = timeout(log_event_busy_timeout, NULL, nticks);
1727c478bd9Sstevel@tonic-gate 	if (id != 0) {
1737c478bd9Sstevel@tonic-gate 		mutex_enter(&event_pause_mutex);
1747c478bd9Sstevel@tonic-gate 		while (event_pause_state)
1757c478bd9Sstevel@tonic-gate 			cv_wait(&event_pause_cv, &event_pause_mutex);
1767c478bd9Sstevel@tonic-gate 		mutex_exit(&event_pause_mutex);
1777c478bd9Sstevel@tonic-gate 	}
1787c478bd9Sstevel@tonic-gate 	event_pause_state = 0;
1797c478bd9Sstevel@tonic-gate }
1807c478bd9Sstevel@tonic-gate 
1817c478bd9Sstevel@tonic-gate 
1827c478bd9Sstevel@tonic-gate /*
1837c478bd9Sstevel@tonic-gate  * log_event_upcall - Perform the upcall to syseventd for event buffer delivery.
1847c478bd9Sstevel@tonic-gate  * 			Check for rebinding errors
1857c478bd9Sstevel@tonic-gate  * 			This buffer is reused to by the syseventd door_return
1867c478bd9Sstevel@tonic-gate  *			to hold the result code
1877c478bd9Sstevel@tonic-gate  */
1887c478bd9Sstevel@tonic-gate static int
log_event_upcall(log_event_upcall_arg_t * arg)1897c478bd9Sstevel@tonic-gate log_event_upcall(log_event_upcall_arg_t *arg)
1907c478bd9Sstevel@tonic-gate {
1917c478bd9Sstevel@tonic-gate 	int error;
1927c478bd9Sstevel@tonic-gate 	size_t size;
1937c478bd9Sstevel@tonic-gate 	sysevent_t *ev;
1947c478bd9Sstevel@tonic-gate 	door_arg_t darg, save_arg;
1957c478bd9Sstevel@tonic-gate 	int retry;
1967c478bd9Sstevel@tonic-gate 	int neagain = 0;
1977c478bd9Sstevel@tonic-gate 	int neintr = 0;
1987c478bd9Sstevel@tonic-gate 	int nticks = LOG_EVENT_MIN_PAUSE;
1997c478bd9Sstevel@tonic-gate 
2007c478bd9Sstevel@tonic-gate 	/* Initialize door args */
2017c478bd9Sstevel@tonic-gate 	ev = (sysevent_t *)&arg->buf;
2027c478bd9Sstevel@tonic-gate 	size = sizeof (log_event_upcall_arg_t) + SE_PAYLOAD_SZ(ev);
2037c478bd9Sstevel@tonic-gate 
2047c478bd9Sstevel@tonic-gate 	darg.rbuf = (char *)arg;
2057c478bd9Sstevel@tonic-gate 	darg.data_ptr = (char *)arg;
2067c478bd9Sstevel@tonic-gate 	darg.rsize = size;
2077c478bd9Sstevel@tonic-gate 	darg.data_size = size;
2087c478bd9Sstevel@tonic-gate 	darg.desc_ptr = NULL;
2097c478bd9Sstevel@tonic-gate 	darg.desc_num = 0;
2107c478bd9Sstevel@tonic-gate 
2117c478bd9Sstevel@tonic-gate 	LOG_DEBUG1((CE_CONT, "log_event_upcall: 0x%llx\n",
2127c478bd9Sstevel@tonic-gate 	    (longlong_t)SE_SEQ((sysevent_t *)&arg->buf)));
2137c478bd9Sstevel@tonic-gate 
2147c478bd9Sstevel@tonic-gate 	save_arg = darg;
2157c478bd9Sstevel@tonic-gate 	for (retry = 0; ; retry++) {
216*e5dc7eacSMarcel Telka 
217*e5dc7eacSMarcel Telka 		mutex_enter(&event_door_mutex);
218*e5dc7eacSMarcel Telka 		if (event_door == NULL) {
219*e5dc7eacSMarcel Telka 			mutex_exit(&event_door_mutex);
220*e5dc7eacSMarcel Telka 
221*e5dc7eacSMarcel Telka 			return (EBADF);
222*e5dc7eacSMarcel Telka 		}
223*e5dc7eacSMarcel Telka 
224323a81d9Sjwadams 		if ((error = door_ki_upcall_limited(event_door, &darg, NULL,
225323a81d9Sjwadams 		    SIZE_MAX, 0)) == 0) {
226*e5dc7eacSMarcel Telka 			mutex_exit(&event_door_mutex);
2277c478bd9Sstevel@tonic-gate 			break;
2287c478bd9Sstevel@tonic-gate 		}
229*e5dc7eacSMarcel Telka 
230*e5dc7eacSMarcel Telka 		/*
231*e5dc7eacSMarcel Telka 		 * EBADF is handled outside the switch below because we need to
232*e5dc7eacSMarcel Telka 		 * hold event_door_mutex a bit longer
233*e5dc7eacSMarcel Telka 		 */
234*e5dc7eacSMarcel Telka 		if (error == EBADF) {
235*e5dc7eacSMarcel Telka 			/* Server died */
236*e5dc7eacSMarcel Telka 			door_ki_rele(event_door);
237*e5dc7eacSMarcel Telka 			event_door = NULL;
238*e5dc7eacSMarcel Telka 
239*e5dc7eacSMarcel Telka 			mutex_exit(&event_door_mutex);
240*e5dc7eacSMarcel Telka 			return (error);
241*e5dc7eacSMarcel Telka 		}
242*e5dc7eacSMarcel Telka 
243*e5dc7eacSMarcel Telka 		mutex_exit(&event_door_mutex);
244*e5dc7eacSMarcel Telka 
245*e5dc7eacSMarcel Telka 		/*
246*e5dc7eacSMarcel Telka 		 * The EBADF case is already handled above with event_door_mutex
247*e5dc7eacSMarcel Telka 		 * held
248*e5dc7eacSMarcel Telka 		 */
2497c478bd9Sstevel@tonic-gate 		switch (error) {
2507c478bd9Sstevel@tonic-gate 		case EINTR:
2517c478bd9Sstevel@tonic-gate 			neintr++;
2527c478bd9Sstevel@tonic-gate 			log_event_pause(2);
2537c478bd9Sstevel@tonic-gate 			darg = save_arg;
2547c478bd9Sstevel@tonic-gate 			break;
2557c478bd9Sstevel@tonic-gate 		case EAGAIN:
2567c478bd9Sstevel@tonic-gate 			/* cannot deliver upcall - process may be forking */
2577c478bd9Sstevel@tonic-gate 			neagain++;
2587c478bd9Sstevel@tonic-gate 			log_event_pause(nticks);
2597c478bd9Sstevel@tonic-gate 			nticks <<= 1;
2607c478bd9Sstevel@tonic-gate 			if (nticks > LOG_EVENT_MAX_PAUSE)
2617c478bd9Sstevel@tonic-gate 				nticks = LOG_EVENT_MAX_PAUSE;
2627c478bd9Sstevel@tonic-gate 			darg = save_arg;
2637c478bd9Sstevel@tonic-gate 			break;
2647c478bd9Sstevel@tonic-gate 		default:
2657c478bd9Sstevel@tonic-gate 			cmn_err(CE_CONT,
2667c478bd9Sstevel@tonic-gate 			    "log_event_upcall: door_ki_upcall error %d\n",
2677c478bd9Sstevel@tonic-gate 			    error);
2687c478bd9Sstevel@tonic-gate 			return (error);
2697c478bd9Sstevel@tonic-gate 		}
2707c478bd9Sstevel@tonic-gate 	}
2717c478bd9Sstevel@tonic-gate 
2727c478bd9Sstevel@tonic-gate 	if (neagain > 0 || neintr > 0) {
2737c478bd9Sstevel@tonic-gate 		LOG_DEBUG((CE_CONT, "upcall: eagain=%d eintr=%d nticks=%d\n",
2747c478bd9Sstevel@tonic-gate 		    neagain, neintr, nticks));
2757c478bd9Sstevel@tonic-gate 	}
2767c478bd9Sstevel@tonic-gate 
2777c478bd9Sstevel@tonic-gate 	LOG_DEBUG1((CE_CONT, "log_event_upcall:\n\t"
2787c478bd9Sstevel@tonic-gate 	    "error=%d rptr1=%p rptr2=%p dptr2=%p ret1=%x ret2=%x\n",
2797c478bd9Sstevel@tonic-gate 	    error, (void *)arg, (void *)darg.rbuf,
2807c478bd9Sstevel@tonic-gate 	    (void *)darg.data_ptr,
2817c478bd9Sstevel@tonic-gate 	    *((int *)(darg.rbuf)), *((int *)(darg.data_ptr))));
2827c478bd9Sstevel@tonic-gate 
2837c478bd9Sstevel@tonic-gate 	if (!error) {
2847c478bd9Sstevel@tonic-gate 		/*
2857c478bd9Sstevel@tonic-gate 		 * upcall was successfully executed. Check return code.
2867c478bd9Sstevel@tonic-gate 		 */
2877c478bd9Sstevel@tonic-gate 		error = *((int *)(darg.rbuf));
2887c478bd9Sstevel@tonic-gate 	}
2897c478bd9Sstevel@tonic-gate 
2907c478bd9Sstevel@tonic-gate 	return (error);
2917c478bd9Sstevel@tonic-gate }
2927c478bd9Sstevel@tonic-gate 
2937c478bd9Sstevel@tonic-gate /*
2947c478bd9Sstevel@tonic-gate  * log_event_deliver - event delivery thread
2957c478bd9Sstevel@tonic-gate  *			Deliver all events on the event queue to syseventd.
2967c478bd9Sstevel@tonic-gate  *			If the daemon can not process events, stop event
2977c478bd9Sstevel@tonic-gate  *			delivery and wait for an indication from the
2987c478bd9Sstevel@tonic-gate  *			daemon to resume delivery.
2997c478bd9Sstevel@tonic-gate  *
3007c478bd9Sstevel@tonic-gate  *			Once all event buffers have been delivered, wait
3017c478bd9Sstevel@tonic-gate  *			until there are more to deliver.
3027c478bd9Sstevel@tonic-gate  */
3037c478bd9Sstevel@tonic-gate static void
log_event_deliver()3047c478bd9Sstevel@tonic-gate log_event_deliver()
3057c478bd9Sstevel@tonic-gate {
3067c478bd9Sstevel@tonic-gate 	log_eventq_t *q;
3077c478bd9Sstevel@tonic-gate 	int upcall_err;
3087c478bd9Sstevel@tonic-gate 	callb_cpr_t cprinfo;
3097c478bd9Sstevel@tonic-gate 
3107c478bd9Sstevel@tonic-gate 	CALLB_CPR_INIT(&cprinfo, &eventq_head_mutex, callb_generic_cpr,
3117c478bd9Sstevel@tonic-gate 	    "logevent");
3127c478bd9Sstevel@tonic-gate 
3137c478bd9Sstevel@tonic-gate 	/*
3147c478bd9Sstevel@tonic-gate 	 * eventq_head_mutex is exited (released) when there are no more
3157c478bd9Sstevel@tonic-gate 	 * events to process from the eventq in cv_wait().
3167c478bd9Sstevel@tonic-gate 	 */
3177c478bd9Sstevel@tonic-gate 	mutex_enter(&eventq_head_mutex);
3187c478bd9Sstevel@tonic-gate 
3197c478bd9Sstevel@tonic-gate 	for (;;) {
3207c478bd9Sstevel@tonic-gate 		LOG_DEBUG1((CE_CONT, "log_event_deliver: head = %p\n",
3217c478bd9Sstevel@tonic-gate 		    (void *)log_eventq_head));
3227c478bd9Sstevel@tonic-gate 
3237c478bd9Sstevel@tonic-gate 		upcall_err = 0;
3247c478bd9Sstevel@tonic-gate 		q = log_eventq_head;
3257c478bd9Sstevel@tonic-gate 
3267c478bd9Sstevel@tonic-gate 		while (q) {
3277c478bd9Sstevel@tonic-gate 			if (log_event_delivery == LOGEVENT_DELIVERY_HOLD) {
3287c478bd9Sstevel@tonic-gate 				upcall_err = EAGAIN;
3297c478bd9Sstevel@tonic-gate 				break;
3307c478bd9Sstevel@tonic-gate 			}
3317c478bd9Sstevel@tonic-gate 
332*e5dc7eacSMarcel Telka 			log_event_delivery = LOGEVENT_DELIVERY_OK;
333*e5dc7eacSMarcel Telka 
334*e5dc7eacSMarcel Telka 			/*
335*e5dc7eacSMarcel Telka 			 * Release event queue lock during upcall to
336*e5dc7eacSMarcel Telka 			 * syseventd
337*e5dc7eacSMarcel Telka 			 */
3387c478bd9Sstevel@tonic-gate 			mutex_exit(&eventq_head_mutex);
3397c478bd9Sstevel@tonic-gate 			if ((upcall_err = log_event_upcall(&q->arg)) != 0) {
3407c478bd9Sstevel@tonic-gate 				mutex_enter(&eventq_head_mutex);
3417c478bd9Sstevel@tonic-gate 				break;
3427c478bd9Sstevel@tonic-gate 			}
3437c478bd9Sstevel@tonic-gate 
3447c478bd9Sstevel@tonic-gate 			/*
3457c478bd9Sstevel@tonic-gate 			 * We may be able to add entries to
3467c478bd9Sstevel@tonic-gate 			 * the queue now.
3477c478bd9Sstevel@tonic-gate 			 */
3487c478bd9Sstevel@tonic-gate 			if (event_qfull_blocked > 0 &&
3497c478bd9Sstevel@tonic-gate 			    log_eventq_cnt < logevent_max_q_sz) {
3507c478bd9Sstevel@tonic-gate 				mutex_enter(&event_qfull_mutex);
3517c478bd9Sstevel@tonic-gate 				if (event_qfull_blocked > 0) {
3527c478bd9Sstevel@tonic-gate 					cv_signal(&event_qfull_cv);
3537c478bd9Sstevel@tonic-gate 				}
3547c478bd9Sstevel@tonic-gate 				mutex_exit(&event_qfull_mutex);
3557c478bd9Sstevel@tonic-gate 			}
3567c478bd9Sstevel@tonic-gate 
3577c478bd9Sstevel@tonic-gate 			mutex_enter(&eventq_head_mutex);
3587c478bd9Sstevel@tonic-gate 
3597c478bd9Sstevel@tonic-gate 			/*
3607c478bd9Sstevel@tonic-gate 			 * Daemon restart can cause entries to be moved from
3617c478bd9Sstevel@tonic-gate 			 * the sent queue and put back on the event queue.
3627c478bd9Sstevel@tonic-gate 			 * If this has occurred, replay event queue
3637c478bd9Sstevel@tonic-gate 			 * processing from the new queue head.
3647c478bd9Sstevel@tonic-gate 			 */
3657c478bd9Sstevel@tonic-gate 			if (q != log_eventq_head) {
3667c478bd9Sstevel@tonic-gate 				q = log_eventq_head;
3677c478bd9Sstevel@tonic-gate 				LOG_DEBUG((CE_CONT, "log_event_deliver: "
3687c478bd9Sstevel@tonic-gate 				    "door upcall/daemon restart race\n"));
3697c478bd9Sstevel@tonic-gate 			} else {
370*e5dc7eacSMarcel Telka 				log_eventq_t *next;
371*e5dc7eacSMarcel Telka 
3727c478bd9Sstevel@tonic-gate 				/*
3737c478bd9Sstevel@tonic-gate 				 * Move the event to the sent queue when a
3747c478bd9Sstevel@tonic-gate 				 * successful delivery has been made.
3757c478bd9Sstevel@tonic-gate 				 */
3767c478bd9Sstevel@tonic-gate 				mutex_enter(&eventq_sent_mutex);
3777c478bd9Sstevel@tonic-gate 				next = q->next;
3787c478bd9Sstevel@tonic-gate 				q->next = log_eventq_sent;
3797c478bd9Sstevel@tonic-gate 				log_eventq_sent = q;
3807c478bd9Sstevel@tonic-gate 				q = next;
3817c478bd9Sstevel@tonic-gate 				log_eventq_head = q;
3827c478bd9Sstevel@tonic-gate 				log_eventq_cnt--;
3837c478bd9Sstevel@tonic-gate 				if (q == NULL) {
3847c478bd9Sstevel@tonic-gate 					ASSERT(log_eventq_cnt == 0);
3857c478bd9Sstevel@tonic-gate 					log_eventq_tail = NULL;
3867c478bd9Sstevel@tonic-gate 				}
3877c478bd9Sstevel@tonic-gate 				mutex_exit(&eventq_sent_mutex);
3887c478bd9Sstevel@tonic-gate 			}
3897c478bd9Sstevel@tonic-gate 		}
3907c478bd9Sstevel@tonic-gate 
3917c478bd9Sstevel@tonic-gate 		switch (upcall_err) {
3927c478bd9Sstevel@tonic-gate 		case 0:
3937c478bd9Sstevel@tonic-gate 			/*
3947c478bd9Sstevel@tonic-gate 			 * Success. The queue is empty.
3957c478bd9Sstevel@tonic-gate 			 */
3967c478bd9Sstevel@tonic-gate 			sysevent_upcall_status = 0;
3977c478bd9Sstevel@tonic-gate 			break;
3987c478bd9Sstevel@tonic-gate 		case EAGAIN:
3997c478bd9Sstevel@tonic-gate 			/*
4007c478bd9Sstevel@tonic-gate 			 * Delivery is on hold (but functional).
4017c478bd9Sstevel@tonic-gate 			 */
4027c478bd9Sstevel@tonic-gate 			sysevent_upcall_status = 0;
4037c478bd9Sstevel@tonic-gate 			/*
4047c478bd9Sstevel@tonic-gate 			 * If the user has already signaled for delivery
4057c478bd9Sstevel@tonic-gate 			 * resumption, continue.  Otherwise, we wait until
4067c478bd9Sstevel@tonic-gate 			 * we are signaled to continue.
4077c478bd9Sstevel@tonic-gate 			 */
408*e5dc7eacSMarcel Telka 			if (log_event_delivery == LOGEVENT_DELIVERY_CONT)
4097c478bd9Sstevel@tonic-gate 				continue;
4107c478bd9Sstevel@tonic-gate 			log_event_delivery = LOGEVENT_DELIVERY_HOLD;
4117c478bd9Sstevel@tonic-gate 
4127c478bd9Sstevel@tonic-gate 			LOG_DEBUG1((CE_CONT, "log_event_deliver: EAGAIN\n"));
4137c478bd9Sstevel@tonic-gate 			break;
4147c478bd9Sstevel@tonic-gate 		default:
4157c478bd9Sstevel@tonic-gate 			LOG_DEBUG((CE_CONT, "log_event_deliver: "
4167c478bd9Sstevel@tonic-gate 			    "upcall err %d\n", upcall_err));
4177c478bd9Sstevel@tonic-gate 			sysevent_upcall_status = upcall_err;
4187c478bd9Sstevel@tonic-gate 			/*
4197c478bd9Sstevel@tonic-gate 			 * Signal everyone waiting that transport is down
4207c478bd9Sstevel@tonic-gate 			 */
4217c478bd9Sstevel@tonic-gate 			if (event_qfull_blocked > 0) {
4227c478bd9Sstevel@tonic-gate 				mutex_enter(&event_qfull_mutex);
4237c478bd9Sstevel@tonic-gate 				if (event_qfull_blocked > 0) {
4247c478bd9Sstevel@tonic-gate 					cv_broadcast(&event_qfull_cv);
4257c478bd9Sstevel@tonic-gate 				}
4267c478bd9Sstevel@tonic-gate 				mutex_exit(&event_qfull_mutex);
4277c478bd9Sstevel@tonic-gate 			}
4287c478bd9Sstevel@tonic-gate 			break;
4297c478bd9Sstevel@tonic-gate 		}
4307c478bd9Sstevel@tonic-gate 
4317c478bd9Sstevel@tonic-gate 		CALLB_CPR_SAFE_BEGIN(&cprinfo);
4327c478bd9Sstevel@tonic-gate 		cv_wait(&log_event_cv, &eventq_head_mutex);
4337c478bd9Sstevel@tonic-gate 		CALLB_CPR_SAFE_END(&cprinfo, &eventq_head_mutex);
4347c478bd9Sstevel@tonic-gate 	}
4357c478bd9Sstevel@tonic-gate 	/* NOTREACHED */
4367c478bd9Sstevel@tonic-gate }
4377c478bd9Sstevel@tonic-gate 
4387c478bd9Sstevel@tonic-gate /*
4397c478bd9Sstevel@tonic-gate  * log_event_init - Allocate and initialize log_event data structures.
4407c478bd9Sstevel@tonic-gate  */
4417c478bd9Sstevel@tonic-gate void
log_event_init()4427c478bd9Sstevel@tonic-gate log_event_init()
4437c478bd9Sstevel@tonic-gate {
444*e5dc7eacSMarcel Telka 	mutex_init(&event_door_mutex, NULL, MUTEX_DEFAULT, NULL);
445*e5dc7eacSMarcel Telka 
4467c478bd9Sstevel@tonic-gate 	mutex_init(&eventq_head_mutex, NULL, MUTEX_DEFAULT, NULL);
4477c478bd9Sstevel@tonic-gate 	mutex_init(&eventq_sent_mutex, NULL, MUTEX_DEFAULT, NULL);
4487c478bd9Sstevel@tonic-gate 	cv_init(&log_event_cv, NULL, CV_DEFAULT, NULL);
4497c478bd9Sstevel@tonic-gate 
4507c478bd9Sstevel@tonic-gate 	mutex_init(&event_qfull_mutex, NULL, MUTEX_DEFAULT, NULL);
4517c478bd9Sstevel@tonic-gate 	cv_init(&event_qfull_cv, NULL, CV_DEFAULT, NULL);
4527c478bd9Sstevel@tonic-gate 
4537c478bd9Sstevel@tonic-gate 	mutex_init(&event_pause_mutex, NULL, MUTEX_DEFAULT, NULL);
4547c478bd9Sstevel@tonic-gate 	cv_init(&event_pause_cv, NULL, CV_DEFAULT, NULL);
4557c478bd9Sstevel@tonic-gate 
4567c478bd9Sstevel@tonic-gate 	mutex_init(&registered_channel_mutex, NULL, MUTEX_DEFAULT, NULL);
4577c478bd9Sstevel@tonic-gate 	sysevent_evc_init();
4587c478bd9Sstevel@tonic-gate }
4597c478bd9Sstevel@tonic-gate 
4607c478bd9Sstevel@tonic-gate /*
4617c478bd9Sstevel@tonic-gate  * The following routines are used by kernel event publishers to
4627c478bd9Sstevel@tonic-gate  * allocate, append and free event buffers
4637c478bd9Sstevel@tonic-gate  */
4647c478bd9Sstevel@tonic-gate /*
4657c478bd9Sstevel@tonic-gate  * sysevent_alloc - Allocate new eventq struct.  This element contains
4667c478bd9Sstevel@tonic-gate  *			an event buffer that will be used in a subsequent
4677c478bd9Sstevel@tonic-gate  *			call to log_sysevent.
4687c478bd9Sstevel@tonic-gate  */
4697c478bd9Sstevel@tonic-gate sysevent_t *
sysevent_alloc(char * class,char * subclass,char * pub,int flag)4707c478bd9Sstevel@tonic-gate sysevent_alloc(char *class, char *subclass, char *pub, int flag)
4717c478bd9Sstevel@tonic-gate {
4727c478bd9Sstevel@tonic-gate 	int payload_sz;
4737c478bd9Sstevel@tonic-gate 	int class_sz, subclass_sz, pub_sz;
4747c478bd9Sstevel@tonic-gate 	int aligned_class_sz, aligned_subclass_sz, aligned_pub_sz;
4757c478bd9Sstevel@tonic-gate 	sysevent_t *ev;
4767c478bd9Sstevel@tonic-gate 	log_eventq_t *q;
4777c478bd9Sstevel@tonic-gate 
4787c478bd9Sstevel@tonic-gate 	ASSERT(class != NULL);
4797c478bd9Sstevel@tonic-gate 	ASSERT(subclass != NULL);
4807c478bd9Sstevel@tonic-gate 	ASSERT(pub != NULL);
4817c478bd9Sstevel@tonic-gate 
4827c478bd9Sstevel@tonic-gate 	/*
4837c478bd9Sstevel@tonic-gate 	 * Calculate and reserve space for the class, subclass and
4847c478bd9Sstevel@tonic-gate 	 * publisher strings in the event buffer
4857c478bd9Sstevel@tonic-gate 	 */
4867c478bd9Sstevel@tonic-gate 	class_sz = strlen(class) + 1;
4877c478bd9Sstevel@tonic-gate 	subclass_sz = strlen(subclass) + 1;
4887c478bd9Sstevel@tonic-gate 	pub_sz = strlen(pub) + 1;
4897c478bd9Sstevel@tonic-gate 
4907c478bd9Sstevel@tonic-gate 	ASSERT((class_sz <= MAX_CLASS_LEN) && (subclass_sz
4917c478bd9Sstevel@tonic-gate 	    <= MAX_SUBCLASS_LEN) && (pub_sz <= MAX_PUB_LEN));
4927c478bd9Sstevel@tonic-gate 
4937c478bd9Sstevel@tonic-gate 	/* String sizes must be 64-bit aligned in the event buffer */
4947c478bd9Sstevel@tonic-gate 	aligned_class_sz = SE_ALIGN(class_sz);
4957c478bd9Sstevel@tonic-gate 	aligned_subclass_sz = SE_ALIGN(subclass_sz);
4967c478bd9Sstevel@tonic-gate 	aligned_pub_sz = SE_ALIGN(pub_sz);
4977c478bd9Sstevel@tonic-gate 
4987c478bd9Sstevel@tonic-gate 	payload_sz = (aligned_class_sz - sizeof (uint64_t)) +
4997c478bd9Sstevel@tonic-gate 	    (aligned_subclass_sz - sizeof (uint64_t)) +
5007c478bd9Sstevel@tonic-gate 	    (aligned_pub_sz - sizeof (uint64_t)) - sizeof (uint64_t);
5017c478bd9Sstevel@tonic-gate 
5027c478bd9Sstevel@tonic-gate 	/*
5037c478bd9Sstevel@tonic-gate 	 * Allocate event buffer plus additional sysevent queue
5047c478bd9Sstevel@tonic-gate 	 * and payload overhead.
5057c478bd9Sstevel@tonic-gate 	 */
5067c478bd9Sstevel@tonic-gate 	q = kmem_zalloc(sizeof (log_eventq_t) + payload_sz, flag);
5077c478bd9Sstevel@tonic-gate 	if (q == NULL) {
5087c478bd9Sstevel@tonic-gate 		return (NULL);
5097c478bd9Sstevel@tonic-gate 	}
5107c478bd9Sstevel@tonic-gate 
5117c478bd9Sstevel@tonic-gate 	/* Initialize the event buffer data */
5127c478bd9Sstevel@tonic-gate 	ev = (sysevent_t *)&q->arg.buf;
5137c478bd9Sstevel@tonic-gate 	SE_VERSION(ev) = SYS_EVENT_VERSION;
5147c478bd9Sstevel@tonic-gate 	bcopy(class, SE_CLASS_NAME(ev), class_sz);
5157c478bd9Sstevel@tonic-gate 
5167c478bd9Sstevel@tonic-gate 	SE_SUBCLASS_OFF(ev) = SE_ALIGN(offsetof(sysevent_impl_t, se_class_name))
5177c478bd9Sstevel@tonic-gate 		+ aligned_class_sz;
5187c478bd9Sstevel@tonic-gate 	bcopy(subclass, SE_SUBCLASS_NAME(ev), subclass_sz);
5197c478bd9Sstevel@tonic-gate 
5207c478bd9Sstevel@tonic-gate 	SE_PUB_OFF(ev) = SE_SUBCLASS_OFF(ev) + aligned_subclass_sz;
5217c478bd9Sstevel@tonic-gate 	bcopy(pub, SE_PUB_NAME(ev), pub_sz);
5227c478bd9Sstevel@tonic-gate 
5237c478bd9Sstevel@tonic-gate 	SE_ATTR_PTR(ev) = UINT64_C(0);
5247c478bd9Sstevel@tonic-gate 	SE_PAYLOAD_SZ(ev) = payload_sz;
5257c478bd9Sstevel@tonic-gate 
5267c478bd9Sstevel@tonic-gate 	return (ev);
5277c478bd9Sstevel@tonic-gate }
5287c478bd9Sstevel@tonic-gate 
5297c478bd9Sstevel@tonic-gate /*
5307c478bd9Sstevel@tonic-gate  * sysevent_free - Free event buffer and any attribute data.
5317c478bd9Sstevel@tonic-gate  */
5327c478bd9Sstevel@tonic-gate void
sysevent_free(sysevent_t * ev)5337c478bd9Sstevel@tonic-gate sysevent_free(sysevent_t *ev)
5347c478bd9Sstevel@tonic-gate {
5357c478bd9Sstevel@tonic-gate 	log_eventq_t *q;
5367c478bd9Sstevel@tonic-gate 	nvlist_t *nvl;
5377c478bd9Sstevel@tonic-gate 
5387c478bd9Sstevel@tonic-gate 	ASSERT(ev != NULL);
5397c478bd9Sstevel@tonic-gate 	q = (log_eventq_t *)((caddr_t)ev - offsetof(log_eventq_t, arg.buf));
5407c478bd9Sstevel@tonic-gate 	nvl = (nvlist_t *)(uintptr_t)SE_ATTR_PTR(ev);
5417c478bd9Sstevel@tonic-gate 
5427c478bd9Sstevel@tonic-gate 	if (nvl != NULL) {
5437c478bd9Sstevel@tonic-gate 		size_t size = 0;
5447c478bd9Sstevel@tonic-gate 		(void) nvlist_size(nvl, &size, encoding);
5457c478bd9Sstevel@tonic-gate 		SE_PAYLOAD_SZ(ev) -= size;
5467c478bd9Sstevel@tonic-gate 		nvlist_free(nvl);
5477c478bd9Sstevel@tonic-gate 	}
5487c478bd9Sstevel@tonic-gate 	kmem_free(q, sizeof (log_eventq_t) + SE_PAYLOAD_SZ(ev));
5497c478bd9Sstevel@tonic-gate }
5507c478bd9Sstevel@tonic-gate 
5517c478bd9Sstevel@tonic-gate /*
5527c478bd9Sstevel@tonic-gate  * free_packed_event - Free packed event buffer
5537c478bd9Sstevel@tonic-gate  */
5547c478bd9Sstevel@tonic-gate static void
free_packed_event(sysevent_t * ev)5557c478bd9Sstevel@tonic-gate free_packed_event(sysevent_t *ev)
5567c478bd9Sstevel@tonic-gate {
5577c478bd9Sstevel@tonic-gate 	log_eventq_t *q;
5587c478bd9Sstevel@tonic-gate 
5597c478bd9Sstevel@tonic-gate 	ASSERT(ev != NULL);
5607c478bd9Sstevel@tonic-gate 	q = (log_eventq_t *)((caddr_t)ev - offsetof(log_eventq_t, arg.buf));
5617c478bd9Sstevel@tonic-gate 
5627c478bd9Sstevel@tonic-gate 	kmem_free(q, sizeof (log_eventq_t) + SE_PAYLOAD_SZ(ev));
5637c478bd9Sstevel@tonic-gate }
5647c478bd9Sstevel@tonic-gate 
5657c478bd9Sstevel@tonic-gate /*
5667c478bd9Sstevel@tonic-gate  * sysevent_add_attr - Add new attribute element to an event attribute list
5677c478bd9Sstevel@tonic-gate  *			If attribute list is NULL, start a new list.
5687c478bd9Sstevel@tonic-gate  */
5697c478bd9Sstevel@tonic-gate int
sysevent_add_attr(sysevent_attr_list_t ** ev_attr_list,char * name,sysevent_value_t * se_value,int flag)5707c478bd9Sstevel@tonic-gate sysevent_add_attr(sysevent_attr_list_t **ev_attr_list, char *name,
5717c478bd9Sstevel@tonic-gate 	sysevent_value_t *se_value, int flag)
5727c478bd9Sstevel@tonic-gate {
5737c478bd9Sstevel@tonic-gate 	int error;
5747c478bd9Sstevel@tonic-gate 	nvlist_t **nvlp = (nvlist_t **)ev_attr_list;
5757c478bd9Sstevel@tonic-gate 
5767c478bd9Sstevel@tonic-gate 	if (nvlp == NULL || se_value == NULL) {
5777c478bd9Sstevel@tonic-gate 		return (SE_EINVAL);
5787c478bd9Sstevel@tonic-gate 	}
5797c478bd9Sstevel@tonic-gate 
5807c478bd9Sstevel@tonic-gate 	/*
5817c478bd9Sstevel@tonic-gate 	 * attr_sz is composed of the value data size + the name data size +
5827c478bd9Sstevel@tonic-gate 	 * any header data.  64-bit aligned.
5837c478bd9Sstevel@tonic-gate 	 */
5847c478bd9Sstevel@tonic-gate 	if (strlen(name) >= MAX_ATTR_NAME) {
5857c478bd9Sstevel@tonic-gate 		return (SE_EINVAL);
5867c478bd9Sstevel@tonic-gate 	}
5877c478bd9Sstevel@tonic-gate 
5887c478bd9Sstevel@tonic-gate 	/*
5897c478bd9Sstevel@tonic-gate 	 * Allocate nvlist
5907c478bd9Sstevel@tonic-gate 	 */
5917c478bd9Sstevel@tonic-gate 	if ((*nvlp == NULL) &&
5927c478bd9Sstevel@tonic-gate 	    (nvlist_alloc(nvlp, NV_UNIQUE_NAME_TYPE, flag) != 0))
5937c478bd9Sstevel@tonic-gate 		return (SE_ENOMEM);
5947c478bd9Sstevel@tonic-gate 
5957c478bd9Sstevel@tonic-gate 	/* add the attribute */
5967c478bd9Sstevel@tonic-gate 	switch (se_value->value_type) {
5977c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_BYTE:
5987c478bd9Sstevel@tonic-gate 		error = nvlist_add_byte(*ev_attr_list, name,
5997c478bd9Sstevel@tonic-gate 		    se_value->value.sv_byte);
6007c478bd9Sstevel@tonic-gate 		break;
6017c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_INT16:
6027c478bd9Sstevel@tonic-gate 		error = nvlist_add_int16(*ev_attr_list, name,
6037c478bd9Sstevel@tonic-gate 		    se_value->value.sv_int16);
6047c478bd9Sstevel@tonic-gate 		break;
6057c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_UINT16:
6067c478bd9Sstevel@tonic-gate 		error = nvlist_add_uint16(*ev_attr_list, name,
6077c478bd9Sstevel@tonic-gate 		    se_value->value.sv_uint16);
6087c478bd9Sstevel@tonic-gate 		break;
6097c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_INT32:
6107c478bd9Sstevel@tonic-gate 		error = nvlist_add_int32(*ev_attr_list, name,
6117c478bd9Sstevel@tonic-gate 		    se_value->value.sv_int32);
6127c478bd9Sstevel@tonic-gate 		break;
6137c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_UINT32:
6147c478bd9Sstevel@tonic-gate 		error = nvlist_add_uint32(*ev_attr_list, name,
6157c478bd9Sstevel@tonic-gate 		    se_value->value.sv_uint32);
6167c478bd9Sstevel@tonic-gate 		break;
6177c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_INT64:
6187c478bd9Sstevel@tonic-gate 		error = nvlist_add_int64(*ev_attr_list, name,
6197c478bd9Sstevel@tonic-gate 		    se_value->value.sv_int64);
6207c478bd9Sstevel@tonic-gate 		break;
6217c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_UINT64:
6227c478bd9Sstevel@tonic-gate 		error = nvlist_add_uint64(*ev_attr_list, name,
6237c478bd9Sstevel@tonic-gate 		    se_value->value.sv_uint64);
6247c478bd9Sstevel@tonic-gate 		break;
6257c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_STRING:
6267c478bd9Sstevel@tonic-gate 		if (strlen((char *)se_value->value.sv_string) >= MAX_STRING_SZ)
6277c478bd9Sstevel@tonic-gate 			return (SE_EINVAL);
6287c478bd9Sstevel@tonic-gate 		error = nvlist_add_string(*ev_attr_list, name,
6297c478bd9Sstevel@tonic-gate 		    se_value->value.sv_string);
6307c478bd9Sstevel@tonic-gate 		break;
6317c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_BYTES:
6327c478bd9Sstevel@tonic-gate 		if (se_value->value.sv_bytes.size > MAX_BYTE_ARRAY)
6337c478bd9Sstevel@tonic-gate 			return (SE_EINVAL);
6347c478bd9Sstevel@tonic-gate 		error = nvlist_add_byte_array(*ev_attr_list, name,
6357c478bd9Sstevel@tonic-gate 		    se_value->value.sv_bytes.data,
6367c478bd9Sstevel@tonic-gate 		    se_value->value.sv_bytes.size);
6377c478bd9Sstevel@tonic-gate 		break;
6387c478bd9Sstevel@tonic-gate 	case SE_DATA_TYPE_TIME:
6397c478bd9Sstevel@tonic-gate 		error = nvlist_add_hrtime(*ev_attr_list, name,
6407c478bd9Sstevel@tonic-gate 		    se_value->value.sv_time);
6417c478bd9Sstevel@tonic-gate 		break;
6427c478bd9Sstevel@tonic-gate 	default:
6437c478bd9Sstevel@tonic-gate 		return (SE_EINVAL);
6447c478bd9Sstevel@tonic-gate 	}
6457c478bd9Sstevel@tonic-gate 
6467c478bd9Sstevel@tonic-gate 	return (error ? SE_ENOMEM : 0);
6477c478bd9Sstevel@tonic-gate }
6487c478bd9Sstevel@tonic-gate 
6497c478bd9Sstevel@tonic-gate /*
6507c478bd9Sstevel@tonic-gate  * sysevent_free_attr - Free an attribute list not associated with an
6517c478bd9Sstevel@tonic-gate  *			event buffer.
6527c478bd9Sstevel@tonic-gate  */
6537c478bd9Sstevel@tonic-gate void
sysevent_free_attr(sysevent_attr_list_t * ev_attr_list)6547c478bd9Sstevel@tonic-gate sysevent_free_attr(sysevent_attr_list_t *ev_attr_list)
6557c478bd9Sstevel@tonic-gate {
6567c478bd9Sstevel@tonic-gate 	nvlist_free((nvlist_t *)ev_attr_list);
6577c478bd9Sstevel@tonic-gate }
6587c478bd9Sstevel@tonic-gate 
6597c478bd9Sstevel@tonic-gate /*
6607c478bd9Sstevel@tonic-gate  * sysevent_attach_attributes - Attach an attribute list to an event buffer.
6617c478bd9Sstevel@tonic-gate  *
6627c478bd9Sstevel@tonic-gate  *	This data will be re-packed into contiguous memory when the event
6637c478bd9Sstevel@tonic-gate  *	buffer is posted to log_sysevent.
6647c478bd9Sstevel@tonic-gate  */
6657c478bd9Sstevel@tonic-gate int
sysevent_attach_attributes(sysevent_t * ev,sysevent_attr_list_t * ev_attr_list)6667c478bd9Sstevel@tonic-gate sysevent_attach_attributes(sysevent_t *ev, sysevent_attr_list_t *ev_attr_list)
6677c478bd9Sstevel@tonic-gate {
6687c478bd9Sstevel@tonic-gate 	size_t size = 0;
6697c478bd9Sstevel@tonic-gate 
6707c478bd9Sstevel@tonic-gate 	if (SE_ATTR_PTR(ev) != UINT64_C(0)) {
6717c478bd9Sstevel@tonic-gate 		return (SE_EINVAL);
6727c478bd9Sstevel@tonic-gate 	}
6737c478bd9Sstevel@tonic-gate 
6747c478bd9Sstevel@tonic-gate 	SE_ATTR_PTR(ev) = (uintptr_t)ev_attr_list;
6757c478bd9Sstevel@tonic-gate 	(void) nvlist_size((nvlist_t *)ev_attr_list, &size, encoding);
6767c478bd9Sstevel@tonic-gate 	SE_PAYLOAD_SZ(ev) += size;
6777c478bd9Sstevel@tonic-gate 	SE_FLAG(ev) = 0;
6787c478bd9Sstevel@tonic-gate 
6797c478bd9Sstevel@tonic-gate 	return (0);
6807c478bd9Sstevel@tonic-gate }
6817c478bd9Sstevel@tonic-gate 
6827c478bd9Sstevel@tonic-gate /*
6837c478bd9Sstevel@tonic-gate  * sysevent_detach_attributes - Detach but don't free attribute list from the
6847c478bd9Sstevel@tonic-gate  *				event buffer.
6857c478bd9Sstevel@tonic-gate  */
6867c478bd9Sstevel@tonic-gate void
sysevent_detach_attributes(sysevent_t * ev)6877c478bd9Sstevel@tonic-gate sysevent_detach_attributes(sysevent_t *ev)
6887c478bd9Sstevel@tonic-gate {
6897c478bd9Sstevel@tonic-gate 	size_t size = 0;
6907c478bd9Sstevel@tonic-gate 	nvlist_t *nvl;
6917c478bd9Sstevel@tonic-gate 
6927c478bd9Sstevel@tonic-gate 	if ((nvl = (nvlist_t *)(uintptr_t)SE_ATTR_PTR(ev)) == NULL) {
6937c478bd9Sstevel@tonic-gate 		return;
6947c478bd9Sstevel@tonic-gate 	}
6957c478bd9Sstevel@tonic-gate 
6967c478bd9Sstevel@tonic-gate 	SE_ATTR_PTR(ev) = UINT64_C(0);
6977c478bd9Sstevel@tonic-gate 	(void) nvlist_size(nvl, &size, encoding);
6987c478bd9Sstevel@tonic-gate 	SE_PAYLOAD_SZ(ev) -= size;
6997c478bd9Sstevel@tonic-gate 	ASSERT(SE_PAYLOAD_SZ(ev) >= 0);
7007c478bd9Sstevel@tonic-gate }
7017c478bd9Sstevel@tonic-gate 
7027c478bd9Sstevel@tonic-gate /*
7037c478bd9Sstevel@tonic-gate  * sysevent_attr_name - Get name of attribute
7047c478bd9Sstevel@tonic-gate  */
7057c478bd9Sstevel@tonic-gate char *
sysevent_attr_name(sysevent_attr_t * attr)7067c478bd9Sstevel@tonic-gate sysevent_attr_name(sysevent_attr_t *attr)
7077c478bd9Sstevel@tonic-gate {
7087c478bd9Sstevel@tonic-gate 	if (attr == NULL) {
7097c478bd9Sstevel@tonic-gate 		return (NULL);
7107c478bd9Sstevel@tonic-gate 	}
7117c478bd9Sstevel@tonic-gate 
7127c478bd9Sstevel@tonic-gate 	return (nvpair_name(attr));
7137c478bd9Sstevel@tonic-gate }
7147c478bd9Sstevel@tonic-gate 
7157c478bd9Sstevel@tonic-gate /*
7167c478bd9Sstevel@tonic-gate  * sysevent_attr_type - Get type of attribute
7177c478bd9Sstevel@tonic-gate  */
7187c478bd9Sstevel@tonic-gate int
sysevent_attr_type(sysevent_attr_t * attr)7197c478bd9Sstevel@tonic-gate sysevent_attr_type(sysevent_attr_t *attr)
7207c478bd9Sstevel@tonic-gate {
7217c478bd9Sstevel@tonic-gate 	/*
7227c478bd9Sstevel@tonic-gate 	 * The SE_DATA_TYPE_* are typedef'ed to be the
7237c478bd9Sstevel@tonic-gate 	 * same value as DATA_TYPE_*
7247c478bd9Sstevel@tonic-gate 	 */
7257c478bd9Sstevel@tonic-gate 	return (nvpair_type((nvpair_t *)attr));
7267c478bd9Sstevel@tonic-gate }
7277c478bd9Sstevel@tonic-gate 
7287c478bd9Sstevel@tonic-gate /*
7297c478bd9Sstevel@tonic-gate  * Repack event buffer into contiguous memory
7307c478bd9Sstevel@tonic-gate  */
7317c478bd9Sstevel@tonic-gate static sysevent_t *
se_repack(sysevent_t * ev,int flag)7327c478bd9Sstevel@tonic-gate se_repack(sysevent_t *ev, int flag)
7337c478bd9Sstevel@tonic-gate {
7347c478bd9Sstevel@tonic-gate 	size_t copy_len;
7357c478bd9Sstevel@tonic-gate 	caddr_t attr;
7367c478bd9Sstevel@tonic-gate 	size_t size;
7377c478bd9Sstevel@tonic-gate 	uint64_t attr_offset;
7387c478bd9Sstevel@tonic-gate 	sysevent_t *copy;
7397c478bd9Sstevel@tonic-gate 	log_eventq_t *qcopy;
7407c478bd9Sstevel@tonic-gate 	sysevent_attr_list_t *nvl;
7417c478bd9Sstevel@tonic-gate 
7427c478bd9Sstevel@tonic-gate 	copy_len = sizeof (log_eventq_t) + SE_PAYLOAD_SZ(ev);
7437c478bd9Sstevel@tonic-gate 	qcopy = kmem_zalloc(copy_len, flag);
7447c478bd9Sstevel@tonic-gate 	if (qcopy == NULL) {
7457c478bd9Sstevel@tonic-gate 		return (NULL);
7467c478bd9Sstevel@tonic-gate 	}
7477c478bd9Sstevel@tonic-gate 	copy = (sysevent_t *)&qcopy->arg.buf;
7487c478bd9Sstevel@tonic-gate 
7497c478bd9Sstevel@tonic-gate 	/*
7507c478bd9Sstevel@tonic-gate 	 * Copy event header, class, subclass and publisher names
7517c478bd9Sstevel@tonic-gate 	 * Set the attribute offset (in number of bytes) to contiguous
7527c478bd9Sstevel@tonic-gate 	 * memory after the header.
7537c478bd9Sstevel@tonic-gate 	 */
7547c478bd9Sstevel@tonic-gate 
7557c478bd9Sstevel@tonic-gate 	attr_offset = SE_ATTR_OFF(ev);
7567c478bd9Sstevel@tonic-gate 
7577c478bd9Sstevel@tonic-gate 	ASSERT((caddr_t)copy + attr_offset <= (caddr_t)copy + copy_len);
7587c478bd9Sstevel@tonic-gate 
7597c478bd9Sstevel@tonic-gate 	bcopy(ev, copy, attr_offset);
7607c478bd9Sstevel@tonic-gate 
7617c478bd9Sstevel@tonic-gate 	/* Check if attribute list exists */
7627c478bd9Sstevel@tonic-gate 	if ((nvl = (nvlist_t *)(uintptr_t)SE_ATTR_PTR(ev)) == NULL) {
7637c478bd9Sstevel@tonic-gate 		return (copy);
7647c478bd9Sstevel@tonic-gate 	}
7657c478bd9Sstevel@tonic-gate 
7667c478bd9Sstevel@tonic-gate 	/*
7677c478bd9Sstevel@tonic-gate 	 * Copy attribute data to contiguous memory
7687c478bd9Sstevel@tonic-gate 	 */
7697c478bd9Sstevel@tonic-gate 	attr = (char *)copy + attr_offset;
7707c478bd9Sstevel@tonic-gate 	(void) nvlist_size(nvl, &size, encoding);
7717c478bd9Sstevel@tonic-gate 	if (nvlist_pack(nvl, &attr, &size, encoding, flag) != 0) {
7727c478bd9Sstevel@tonic-gate 		kmem_free(qcopy, copy_len);
7737c478bd9Sstevel@tonic-gate 		return (NULL);
7747c478bd9Sstevel@tonic-gate 	}
7757c478bd9Sstevel@tonic-gate 	SE_ATTR_PTR(copy) = UINT64_C(0);
7767c478bd9Sstevel@tonic-gate 	SE_FLAG(copy) = SE_PACKED_BUF;
7777c478bd9Sstevel@tonic-gate 
7787c478bd9Sstevel@tonic-gate 	return (copy);
7797c478bd9Sstevel@tonic-gate }
7807c478bd9Sstevel@tonic-gate 
7817c478bd9Sstevel@tonic-gate /*
7827c478bd9Sstevel@tonic-gate  * The sysevent registration provides a persistent and reliable database
7837c478bd9Sstevel@tonic-gate  * for channel information for sysevent channel publishers and
7847c478bd9Sstevel@tonic-gate  * subscribers.
7857c478bd9Sstevel@tonic-gate  *
7867c478bd9Sstevel@tonic-gate  * A channel is created and maintained by the kernel upon the first
7877c478bd9Sstevel@tonic-gate  * SE_OPEN_REGISTRATION operation to log_sysevent_register().  Channel
7887c478bd9Sstevel@tonic-gate  * event subscription information is updated as publishers or subscribers
7897c478bd9Sstevel@tonic-gate  * perform subsequent operations (SE_BIND_REGISTRATION, SE_REGISTER,
7907c478bd9Sstevel@tonic-gate  * SE_UNREGISTER and SE_UNBIND_REGISTRATION).
7917c478bd9Sstevel@tonic-gate  *
7927c478bd9Sstevel@tonic-gate  * For consistency, id's are assigned for every publisher or subscriber
7937c478bd9Sstevel@tonic-gate  * bound to a particular channel.  The id's are used to constrain resources
7947c478bd9Sstevel@tonic-gate  * and perform subscription lookup.
7957c478bd9Sstevel@tonic-gate  *
7967c478bd9Sstevel@tonic-gate  * Associated with each channel is a hashed list of the current subscriptions
7977c478bd9Sstevel@tonic-gate  * based upon event class and subclasses.  A subscription contains a class name,
7987c478bd9Sstevel@tonic-gate  * list of possible subclasses and an array of subscriber ids.  Subscriptions
7997c478bd9Sstevel@tonic-gate  * are updated for every SE_REGISTER or SE_UNREGISTER operation.
8007c478bd9Sstevel@tonic-gate  *
8017c478bd9Sstevel@tonic-gate  * Channels are closed once the last subscriber or publisher performs a
8027c478bd9Sstevel@tonic-gate  * SE_CLOSE_REGISTRATION operation.  All resources associated with the named
8037c478bd9Sstevel@tonic-gate  * channel are freed upon last close.
8047c478bd9Sstevel@tonic-gate  *
8057c478bd9Sstevel@tonic-gate  * Locking:
8067c478bd9Sstevel@tonic-gate  *	Every operation to log_sysevent() is protected by a single lock,
8077c478bd9Sstevel@tonic-gate  *	registered_channel_mutex.  It is expected that the granularity of
8087c478bd9Sstevel@tonic-gate  *	a single lock is sufficient given the frequency that updates will
8097c478bd9Sstevel@tonic-gate  *	occur.
8107c478bd9Sstevel@tonic-gate  *
8117c478bd9Sstevel@tonic-gate  *	If this locking strategy proves to be too contentious, a per-hash
8127c478bd9Sstevel@tonic-gate  *	or per-channel locking strategy may be implemented.
8137c478bd9Sstevel@tonic-gate  */
8147c478bd9Sstevel@tonic-gate 
8157c478bd9Sstevel@tonic-gate 
8167c478bd9Sstevel@tonic-gate #define	CHANN_HASH(channel_name)	(hash_func(channel_name) \
8177c478bd9Sstevel@tonic-gate 					% CHAN_HASH_SZ)
8187c478bd9Sstevel@tonic-gate 
8197c478bd9Sstevel@tonic-gate sysevent_channel_descriptor_t *registered_channels[CHAN_HASH_SZ];
8207c478bd9Sstevel@tonic-gate static int channel_cnt;
8217c478bd9Sstevel@tonic-gate static void remove_all_class(sysevent_channel_descriptor_t *chan,
8227c478bd9Sstevel@tonic-gate 	uint32_t sub_id);
8237c478bd9Sstevel@tonic-gate 
8247c478bd9Sstevel@tonic-gate static uint32_t
hash_func(const char * s)8257c478bd9Sstevel@tonic-gate hash_func(const char *s)
8267c478bd9Sstevel@tonic-gate {
8277c478bd9Sstevel@tonic-gate 	uint32_t result = 0;
8287c478bd9Sstevel@tonic-gate 	uint_t g;
8297c478bd9Sstevel@tonic-gate 
8307c478bd9Sstevel@tonic-gate 	while (*s != '\0') {
8317c478bd9Sstevel@tonic-gate 		result <<= 4;
8327c478bd9Sstevel@tonic-gate 		result += (uint32_t)*s++;
8337c478bd9Sstevel@tonic-gate 		g = result & 0xf0000000;
8347c478bd9Sstevel@tonic-gate 		if (g != 0) {
8357c478bd9Sstevel@tonic-gate 			result ^= g >> 24;
8367c478bd9Sstevel@tonic-gate 			result ^= g;
8377c478bd9Sstevel@tonic-gate 		}
8387c478bd9Sstevel@tonic-gate 	}
8397c478bd9Sstevel@tonic-gate 
8407c478bd9Sstevel@tonic-gate 	return (result);
8417c478bd9Sstevel@tonic-gate }
8427c478bd9Sstevel@tonic-gate 
8437c478bd9Sstevel@tonic-gate static sysevent_channel_descriptor_t *
get_channel(char * channel_name)8447c478bd9Sstevel@tonic-gate get_channel(char *channel_name)
8457c478bd9Sstevel@tonic-gate {
8467c478bd9Sstevel@tonic-gate 	int hash_index;
8477c478bd9Sstevel@tonic-gate 	sysevent_channel_descriptor_t *chan_list;
8487c478bd9Sstevel@tonic-gate 
8497c478bd9Sstevel@tonic-gate 	if (channel_name == NULL)
8507c478bd9Sstevel@tonic-gate 		return (NULL);
8517c478bd9Sstevel@tonic-gate 
8527c478bd9Sstevel@tonic-gate 	/* Find channel descriptor */
8537c478bd9Sstevel@tonic-gate 	hash_index = CHANN_HASH(channel_name);
8547c478bd9Sstevel@tonic-gate 	chan_list = registered_channels[hash_index];
8557c478bd9Sstevel@tonic-gate 	while (chan_list != NULL) {
8567c478bd9Sstevel@tonic-gate 		if (strcmp(chan_list->scd_channel_name, channel_name) == 0) {
8577c478bd9Sstevel@tonic-gate 			break;
8587c478bd9Sstevel@tonic-gate 		} else {
8597c478bd9Sstevel@tonic-gate 			chan_list = chan_list->scd_next;
8607c478bd9Sstevel@tonic-gate 		}
8617c478bd9Sstevel@tonic-gate 	}
8627c478bd9Sstevel@tonic-gate 
8637c478bd9Sstevel@tonic-gate 	return (chan_list);
8647c478bd9Sstevel@tonic-gate }
8657c478bd9Sstevel@tonic-gate 
8667c478bd9Sstevel@tonic-gate static class_lst_t *
create_channel_registration(sysevent_channel_descriptor_t * chan,char * event_class,int index)8677c478bd9Sstevel@tonic-gate create_channel_registration(sysevent_channel_descriptor_t *chan,
8687c478bd9Sstevel@tonic-gate     char *event_class, int index)
8697c478bd9Sstevel@tonic-gate {
8707c478bd9Sstevel@tonic-gate 	size_t class_len;
8717c478bd9Sstevel@tonic-gate 	class_lst_t *c_list;
8727c478bd9Sstevel@tonic-gate 
8737c478bd9Sstevel@tonic-gate 	class_len = strlen(event_class) + 1;
8747c478bd9Sstevel@tonic-gate 	c_list = kmem_zalloc(sizeof (class_lst_t), KM_SLEEP);
8757c478bd9Sstevel@tonic-gate 	c_list->cl_name = kmem_zalloc(class_len, KM_SLEEP);
8767c478bd9Sstevel@tonic-gate 	bcopy(event_class, c_list->cl_name, class_len);
8777c478bd9Sstevel@tonic-gate 
8787c478bd9Sstevel@tonic-gate 	c_list->cl_subclass_list =
8797c478bd9Sstevel@tonic-gate 	    kmem_zalloc(sizeof (subclass_lst_t), KM_SLEEP);
8807c478bd9Sstevel@tonic-gate 	c_list->cl_subclass_list->sl_name =
8817c478bd9Sstevel@tonic-gate 	    kmem_zalloc(sizeof (EC_SUB_ALL), KM_SLEEP);
8827c478bd9Sstevel@tonic-gate 	bcopy(EC_SUB_ALL, c_list->cl_subclass_list->sl_name,
8837c478bd9Sstevel@tonic-gate 	    sizeof (EC_SUB_ALL));
8847c478bd9Sstevel@tonic-gate 
8857c478bd9Sstevel@tonic-gate 	c_list->cl_next = chan->scd_class_list_tbl[index];
8867c478bd9Sstevel@tonic-gate 	chan->scd_class_list_tbl[index] = c_list;
8877c478bd9Sstevel@tonic-gate 
8887c478bd9Sstevel@tonic-gate 	return (c_list);
8897c478bd9Sstevel@tonic-gate }
8907c478bd9Sstevel@tonic-gate 
8917c478bd9Sstevel@tonic-gate static void
free_channel_registration(sysevent_channel_descriptor_t * chan)8927c478bd9Sstevel@tonic-gate free_channel_registration(sysevent_channel_descriptor_t *chan)
8937c478bd9Sstevel@tonic-gate {
8947c478bd9Sstevel@tonic-gate 	int i;
8957c478bd9Sstevel@tonic-gate 	class_lst_t *clist, *next_clist;
8967c478bd9Sstevel@tonic-gate 	subclass_lst_t *sclist, *next_sc;
8977c478bd9Sstevel@tonic-gate 
8987c478bd9Sstevel@tonic-gate 	for (i = 0; i <= CLASS_HASH_SZ; ++i) {
8997c478bd9Sstevel@tonic-gate 
9007c478bd9Sstevel@tonic-gate 		clist = chan->scd_class_list_tbl[i];
9017c478bd9Sstevel@tonic-gate 		while (clist != NULL) {
9027c478bd9Sstevel@tonic-gate 			sclist = clist->cl_subclass_list;
9037c478bd9Sstevel@tonic-gate 			while (sclist != NULL) {
9047c478bd9Sstevel@tonic-gate 				kmem_free(sclist->sl_name,
9057c478bd9Sstevel@tonic-gate 				    strlen(sclist->sl_name) + 1);
9067c478bd9Sstevel@tonic-gate 				next_sc = sclist->sl_next;
9077c478bd9Sstevel@tonic-gate 				kmem_free(sclist, sizeof (subclass_lst_t));
9087c478bd9Sstevel@tonic-gate 				sclist = next_sc;
9097c478bd9Sstevel@tonic-gate 			}
9107c478bd9Sstevel@tonic-gate 			kmem_free(clist->cl_name,
9117c478bd9Sstevel@tonic-gate 			    strlen(clist->cl_name) + 1);
9127c478bd9Sstevel@tonic-gate 			next_clist = clist->cl_next;
9137c478bd9Sstevel@tonic-gate 			kmem_free(clist, sizeof (class_lst_t));
9147c478bd9Sstevel@tonic-gate 			clist = next_clist;
9157c478bd9Sstevel@tonic-gate 		}
9167c478bd9Sstevel@tonic-gate 	}
9177c478bd9Sstevel@tonic-gate 	chan->scd_class_list_tbl[0] = NULL;
9187c478bd9Sstevel@tonic-gate }
9197c478bd9Sstevel@tonic-gate 
9207c478bd9Sstevel@tonic-gate static int
open_channel(char * channel_name)9217c478bd9Sstevel@tonic-gate open_channel(char *channel_name)
9227c478bd9Sstevel@tonic-gate {
9237c478bd9Sstevel@tonic-gate 	int hash_index;
9247c478bd9Sstevel@tonic-gate 	sysevent_channel_descriptor_t *chan, *chan_list;
9257c478bd9Sstevel@tonic-gate 
9267c478bd9Sstevel@tonic-gate 
9277c478bd9Sstevel@tonic-gate 	if (channel_cnt > MAX_CHAN) {
9287c478bd9Sstevel@tonic-gate 		return (-1);
9297c478bd9Sstevel@tonic-gate 	}
9307c478bd9Sstevel@tonic-gate 
9317c478bd9Sstevel@tonic-gate 	/* Find channel descriptor */
9327c478bd9Sstevel@tonic-gate 	hash_index = CHANN_HASH(channel_name);
9337c478bd9Sstevel@tonic-gate 	chan_list = registered_channels[hash_index];
9347c478bd9Sstevel@tonic-gate 	while (chan_list != NULL) {
9357c478bd9Sstevel@tonic-gate 		if (strcmp(chan_list->scd_channel_name, channel_name) == 0) {
9367c478bd9Sstevel@tonic-gate 			chan_list->scd_ref_cnt++;
9377c478bd9Sstevel@tonic-gate 			kmem_free(channel_name, strlen(channel_name) + 1);
9387c478bd9Sstevel@tonic-gate 			return (0);
9397c478bd9Sstevel@tonic-gate 		} else {
9407c478bd9Sstevel@tonic-gate 			chan_list = chan_list->scd_next;
9417c478bd9Sstevel@tonic-gate 		}
9427c478bd9Sstevel@tonic-gate 	}
9437c478bd9Sstevel@tonic-gate 
9447c478bd9Sstevel@tonic-gate 
9457c478bd9Sstevel@tonic-gate 	/* New channel descriptor */
9467c478bd9Sstevel@tonic-gate 	chan = kmem_zalloc(sizeof (sysevent_channel_descriptor_t), KM_SLEEP);
9477c478bd9Sstevel@tonic-gate 	chan->scd_channel_name = channel_name;
9487c478bd9Sstevel@tonic-gate 
9497c478bd9Sstevel@tonic-gate 	/*
9507c478bd9Sstevel@tonic-gate 	 * Create subscriber ids in the range [1, MAX_SUBSCRIBERS).
9517c478bd9Sstevel@tonic-gate 	 * Subscriber id 0 is never allocated, but is used as a reserved id
9527c478bd9Sstevel@tonic-gate 	 * by libsysevent
9537c478bd9Sstevel@tonic-gate 	 */
9547c478bd9Sstevel@tonic-gate 	if ((chan->scd_subscriber_cache = vmem_create(channel_name, (void *)1,
9557c478bd9Sstevel@tonic-gate 	    MAX_SUBSCRIBERS + 1, 1, NULL, NULL, NULL, 0,
9567c478bd9Sstevel@tonic-gate 	    VM_NOSLEEP | VMC_IDENTIFIER)) == NULL) {
9577c478bd9Sstevel@tonic-gate 		kmem_free(chan, sizeof (sysevent_channel_descriptor_t));
9587c478bd9Sstevel@tonic-gate 		return (-1);
9597c478bd9Sstevel@tonic-gate 	}
9607c478bd9Sstevel@tonic-gate 	if ((chan->scd_publisher_cache = vmem_create(channel_name, (void *)1,
9617c478bd9Sstevel@tonic-gate 	    MAX_PUBLISHERS + 1, 1, NULL, NULL, NULL, 0,
9627c478bd9Sstevel@tonic-gate 	    VM_NOSLEEP | VMC_IDENTIFIER)) == NULL) {
9637c478bd9Sstevel@tonic-gate 		vmem_destroy(chan->scd_subscriber_cache);
9647c478bd9Sstevel@tonic-gate 		kmem_free(chan, sizeof (sysevent_channel_descriptor_t));
9657c478bd9Sstevel@tonic-gate 		return (-1);
9667c478bd9Sstevel@tonic-gate 	}
9677c478bd9Sstevel@tonic-gate 
9687c478bd9Sstevel@tonic-gate 	chan->scd_ref_cnt = 1;
9697c478bd9Sstevel@tonic-gate 
9707c478bd9Sstevel@tonic-gate 	(void) create_channel_registration(chan, EC_ALL, 0);
9717c478bd9Sstevel@tonic-gate 
9727c478bd9Sstevel@tonic-gate 	if (registered_channels[hash_index] != NULL)
9737c478bd9Sstevel@tonic-gate 		chan->scd_next = registered_channels[hash_index];
9747c478bd9Sstevel@tonic-gate 
9757c478bd9Sstevel@tonic-gate 	registered_channels[hash_index] = chan;
9767c478bd9Sstevel@tonic-gate 
9777c478bd9Sstevel@tonic-gate 	++channel_cnt;
9787c478bd9Sstevel@tonic-gate 
9797c478bd9Sstevel@tonic-gate 	return (0);
9807c478bd9Sstevel@tonic-gate }
9817c478bd9Sstevel@tonic-gate 
9827c478bd9Sstevel@tonic-gate static void
close_channel(char * channel_name)9837c478bd9Sstevel@tonic-gate close_channel(char *channel_name)
9847c478bd9Sstevel@tonic-gate {
9857c478bd9Sstevel@tonic-gate 	int hash_index;
9867c478bd9Sstevel@tonic-gate 	sysevent_channel_descriptor_t *chan, *prev_chan;
9877c478bd9Sstevel@tonic-gate 
9887c478bd9Sstevel@tonic-gate 	/* Find channel descriptor */
9897c478bd9Sstevel@tonic-gate 	hash_index = CHANN_HASH(channel_name);
9907c478bd9Sstevel@tonic-gate 	prev_chan = chan = registered_channels[hash_index];
9917c478bd9Sstevel@tonic-gate 
9927c478bd9Sstevel@tonic-gate 	while (chan != NULL) {
9937c478bd9Sstevel@tonic-gate 		if (strcmp(chan->scd_channel_name, channel_name) == 0) {
9947c478bd9Sstevel@tonic-gate 			break;
9957c478bd9Sstevel@tonic-gate 		} else {
9967c478bd9Sstevel@tonic-gate 			prev_chan = chan;
9977c478bd9Sstevel@tonic-gate 			chan = chan->scd_next;
9987c478bd9Sstevel@tonic-gate 		}
9997c478bd9Sstevel@tonic-gate 	}
10007c478bd9Sstevel@tonic-gate 
10017c478bd9Sstevel@tonic-gate 	if (chan == NULL)
10027c478bd9Sstevel@tonic-gate 		return;
10037c478bd9Sstevel@tonic-gate 
10047c478bd9Sstevel@tonic-gate 	chan->scd_ref_cnt--;
10057c478bd9Sstevel@tonic-gate 	if (chan->scd_ref_cnt > 0)
10067c478bd9Sstevel@tonic-gate 		return;
10077c478bd9Sstevel@tonic-gate 
10087c478bd9Sstevel@tonic-gate 	free_channel_registration(chan);
10097c478bd9Sstevel@tonic-gate 	vmem_destroy(chan->scd_subscriber_cache);
10107c478bd9Sstevel@tonic-gate 	vmem_destroy(chan->scd_publisher_cache);
10117c478bd9Sstevel@tonic-gate 	kmem_free(chan->scd_channel_name,
10127c478bd9Sstevel@tonic-gate 	    strlen(chan->scd_channel_name) + 1);
10137c478bd9Sstevel@tonic-gate 	if (registered_channels[hash_index] == chan)
10147c478bd9Sstevel@tonic-gate 		registered_channels[hash_index] = chan->scd_next;
10157c478bd9Sstevel@tonic-gate 	else
10167c478bd9Sstevel@tonic-gate 		prev_chan->scd_next = chan->scd_next;
10177c478bd9Sstevel@tonic-gate 	kmem_free(chan, sizeof (sysevent_channel_descriptor_t));
10187c478bd9Sstevel@tonic-gate 	--channel_cnt;
10197c478bd9Sstevel@tonic-gate }
10207c478bd9Sstevel@tonic-gate 
10217c478bd9Sstevel@tonic-gate static id_t
bind_common(sysevent_channel_descriptor_t * chan,int type)10227c478bd9Sstevel@tonic-gate bind_common(sysevent_channel_descriptor_t *chan, int type)
10237c478bd9Sstevel@tonic-gate {
10247c478bd9Sstevel@tonic-gate 	id_t id;
10257c478bd9Sstevel@tonic-gate 
10267c478bd9Sstevel@tonic-gate 	if (type == SUBSCRIBER) {
10277c478bd9Sstevel@tonic-gate 		id = (id_t)(uintptr_t)vmem_alloc(chan->scd_subscriber_cache, 1,
10287c478bd9Sstevel@tonic-gate 		    VM_NOSLEEP | VM_NEXTFIT);
10297c478bd9Sstevel@tonic-gate 		if (id <= 0 || id > MAX_SUBSCRIBERS)
10307c478bd9Sstevel@tonic-gate 			return (0);
10317c478bd9Sstevel@tonic-gate 		chan->scd_subscriber_ids[id] = 1;
10327c478bd9Sstevel@tonic-gate 	} else {
10337c478bd9Sstevel@tonic-gate 		id = (id_t)(uintptr_t)vmem_alloc(chan->scd_publisher_cache, 1,
10347c478bd9Sstevel@tonic-gate 		    VM_NOSLEEP | VM_NEXTFIT);
10357c478bd9Sstevel@tonic-gate 		if (id <= 0 || id > MAX_PUBLISHERS)
10367c478bd9Sstevel@tonic-gate 			return (0);
10377c478bd9Sstevel@tonic-gate 		chan->scd_publisher_ids[id] = 1;
10387c478bd9Sstevel@tonic-gate 	}
10397c478bd9Sstevel@tonic-gate 
10407c478bd9Sstevel@tonic-gate 	return (id);
10417c478bd9Sstevel@tonic-gate }
10427c478bd9Sstevel@tonic-gate 
10437c478bd9Sstevel@tonic-gate static int
unbind_common(sysevent_channel_descriptor_t * chan,int type,id_t id)10447c478bd9Sstevel@tonic-gate unbind_common(sysevent_channel_descriptor_t *chan, int type, id_t id)
10457c478bd9Sstevel@tonic-gate {
10467c478bd9Sstevel@tonic-gate 	if (type == SUBSCRIBER) {
10477c478bd9Sstevel@tonic-gate 		if (id <= 0 || id > MAX_SUBSCRIBERS)
10487c478bd9Sstevel@tonic-gate 			return (0);
10497c478bd9Sstevel@tonic-gate 		if (chan->scd_subscriber_ids[id] == 0)
10507c478bd9Sstevel@tonic-gate 			return (0);
10517c478bd9Sstevel@tonic-gate 		(void) remove_all_class(chan, id);
10527c478bd9Sstevel@tonic-gate 		chan->scd_subscriber_ids[id] = 0;
10537c478bd9Sstevel@tonic-gate 		vmem_free(chan->scd_subscriber_cache, (void *)(uintptr_t)id, 1);
10547c478bd9Sstevel@tonic-gate 	} else {
10557c478bd9Sstevel@tonic-gate 		if (id <= 0 || id > MAX_PUBLISHERS)
10567c478bd9Sstevel@tonic-gate 			return (0);
10577c478bd9Sstevel@tonic-gate 		if (chan->scd_publisher_ids[id] == 0)
10587c478bd9Sstevel@tonic-gate 			return (0);
10597c478bd9Sstevel@tonic-gate 		chan->scd_publisher_ids[id] = 0;
10607c478bd9Sstevel@tonic-gate 		vmem_free(chan->scd_publisher_cache, (void *)(uintptr_t)id, 1);
10617c478bd9Sstevel@tonic-gate 	}
10627c478bd9Sstevel@tonic-gate 
10637c478bd9Sstevel@tonic-gate 	return (1);
10647c478bd9Sstevel@tonic-gate }
10657c478bd9Sstevel@tonic-gate 
10667c478bd9Sstevel@tonic-gate static void
release_id(sysevent_channel_descriptor_t * chan,int type,id_t id)10677c478bd9Sstevel@tonic-gate release_id(sysevent_channel_descriptor_t *chan, int type, id_t id)
10687c478bd9Sstevel@tonic-gate {
10697c478bd9Sstevel@tonic-gate 	if (unbind_common(chan, type, id))
10707c478bd9Sstevel@tonic-gate 		close_channel(chan->scd_channel_name);
10717c478bd9Sstevel@tonic-gate }
10727c478bd9Sstevel@tonic-gate 
10737c478bd9Sstevel@tonic-gate static subclass_lst_t *
find_subclass(class_lst_t * c_list,char * subclass)10747c478bd9Sstevel@tonic-gate find_subclass(class_lst_t *c_list, char *subclass)
10757c478bd9Sstevel@tonic-gate {
10767c478bd9Sstevel@tonic-gate 	subclass_lst_t *sc_list;
10777c478bd9Sstevel@tonic-gate 
10787c478bd9Sstevel@tonic-gate 	if (c_list == NULL)
10797c478bd9Sstevel@tonic-gate 		return (NULL);
10807c478bd9Sstevel@tonic-gate 
10817c478bd9Sstevel@tonic-gate 	sc_list = c_list->cl_subclass_list;
10827c478bd9Sstevel@tonic-gate 
10837c478bd9Sstevel@tonic-gate 	while (sc_list != NULL) {
10847c478bd9Sstevel@tonic-gate 		if (strcmp(sc_list->sl_name, subclass) == 0) {
10857c478bd9Sstevel@tonic-gate 			return (sc_list);
10867c478bd9Sstevel@tonic-gate 		}
10877c478bd9Sstevel@tonic-gate 		sc_list = sc_list->sl_next;
10887c478bd9Sstevel@tonic-gate 	}
10897c478bd9Sstevel@tonic-gate 
10907c478bd9Sstevel@tonic-gate 	return (NULL);
10917c478bd9Sstevel@tonic-gate }
10927c478bd9Sstevel@tonic-gate 
10937c478bd9Sstevel@tonic-gate static void
insert_subclass(class_lst_t * c_list,char ** subclass_names,int subclass_num,uint32_t sub_id)10947c478bd9Sstevel@tonic-gate insert_subclass(class_lst_t *c_list, char **subclass_names,
10957c478bd9Sstevel@tonic-gate 	int subclass_num, uint32_t sub_id)
10967c478bd9Sstevel@tonic-gate {
10977c478bd9Sstevel@tonic-gate 	int i, subclass_sz;
10987c478bd9Sstevel@tonic-gate 	subclass_lst_t *sc_list;
10997c478bd9Sstevel@tonic-gate 
11007c478bd9Sstevel@tonic-gate 	for (i = 0; i < subclass_num; ++i) {
11017c478bd9Sstevel@tonic-gate 		if ((sc_list = find_subclass(c_list, subclass_names[i]))
11027c478bd9Sstevel@tonic-gate 		    != NULL) {
11037c478bd9Sstevel@tonic-gate 			sc_list->sl_num[sub_id] = 1;
11047c478bd9Sstevel@tonic-gate 		} else {
11057c478bd9Sstevel@tonic-gate 
11067c478bd9Sstevel@tonic-gate 			sc_list = kmem_zalloc(sizeof (subclass_lst_t),
11077c478bd9Sstevel@tonic-gate 			    KM_SLEEP);
11087c478bd9Sstevel@tonic-gate 			subclass_sz = strlen(subclass_names[i]) + 1;
11097c478bd9Sstevel@tonic-gate 			sc_list->sl_name = kmem_zalloc(subclass_sz, KM_SLEEP);
11107c478bd9Sstevel@tonic-gate 			bcopy(subclass_names[i], sc_list->sl_name,
11117c478bd9Sstevel@tonic-gate 			    subclass_sz);
11127c478bd9Sstevel@tonic-gate 
11137c478bd9Sstevel@tonic-gate 			sc_list->sl_num[sub_id] = 1;
11147c478bd9Sstevel@tonic-gate 
11157c478bd9Sstevel@tonic-gate 			sc_list->sl_next = c_list->cl_subclass_list;
11167c478bd9Sstevel@tonic-gate 			c_list->cl_subclass_list = sc_list;
11177c478bd9Sstevel@tonic-gate 		}
11187c478bd9Sstevel@tonic-gate 	}
11197c478bd9Sstevel@tonic-gate }
11207c478bd9Sstevel@tonic-gate 
11217c478bd9Sstevel@tonic-gate static class_lst_t *
find_class(sysevent_channel_descriptor_t * chan,char * class_name)11227c478bd9Sstevel@tonic-gate find_class(sysevent_channel_descriptor_t *chan, char *class_name)
11237c478bd9Sstevel@tonic-gate {
11247c478bd9Sstevel@tonic-gate 	class_lst_t *c_list;
11257c478bd9Sstevel@tonic-gate 
11267c478bd9Sstevel@tonic-gate 	c_list = chan->scd_class_list_tbl[CLASS_HASH(class_name)];
11277c478bd9Sstevel@tonic-gate 	while (c_list != NULL) {
11287c478bd9Sstevel@tonic-gate 		if (strcmp(class_name, c_list->cl_name) == 0)
11297c478bd9Sstevel@tonic-gate 			break;
11307c478bd9Sstevel@tonic-gate 		c_list = c_list->cl_next;
11317c478bd9Sstevel@tonic-gate 	}
11327c478bd9Sstevel@tonic-gate 
11337c478bd9Sstevel@tonic-gate 	return (c_list);
11347c478bd9Sstevel@tonic-gate }
11357c478bd9Sstevel@tonic-gate 
11367c478bd9Sstevel@tonic-gate static void
remove_all_class(sysevent_channel_descriptor_t * chan,uint32_t sub_id)11377c478bd9Sstevel@tonic-gate remove_all_class(sysevent_channel_descriptor_t *chan, uint32_t sub_id)
11387c478bd9Sstevel@tonic-gate {
11397c478bd9Sstevel@tonic-gate 	int i;
11407c478bd9Sstevel@tonic-gate 	class_lst_t *c_list;
11417c478bd9Sstevel@tonic-gate 	subclass_lst_t *sc_list;
11427c478bd9Sstevel@tonic-gate 
11437c478bd9Sstevel@tonic-gate 	for (i = 0; i <= CLASS_HASH_SZ; ++i) {
11447c478bd9Sstevel@tonic-gate 
11457c478bd9Sstevel@tonic-gate 		c_list = chan->scd_class_list_tbl[i];
11467c478bd9Sstevel@tonic-gate 		while (c_list != NULL) {
11477c478bd9Sstevel@tonic-gate 			sc_list = c_list->cl_subclass_list;
11487c478bd9Sstevel@tonic-gate 			while (sc_list != NULL) {
11497c478bd9Sstevel@tonic-gate 				sc_list->sl_num[sub_id] = 0;
11507c478bd9Sstevel@tonic-gate 				sc_list = sc_list->sl_next;
11517c478bd9Sstevel@tonic-gate 			}
11527c478bd9Sstevel@tonic-gate 			c_list = c_list->cl_next;
11537c478bd9Sstevel@tonic-gate 		}
11547c478bd9Sstevel@tonic-gate 	}
11557c478bd9Sstevel@tonic-gate }
11567c478bd9Sstevel@tonic-gate 
11577c478bd9Sstevel@tonic-gate static void
remove_class(sysevent_channel_descriptor_t * chan,uint32_t sub_id,char * class_name)11587c478bd9Sstevel@tonic-gate remove_class(sysevent_channel_descriptor_t *chan, uint32_t sub_id,
11597c478bd9Sstevel@tonic-gate 	char *class_name)
11607c478bd9Sstevel@tonic-gate {
11617c478bd9Sstevel@tonic-gate 	class_lst_t *c_list;
11627c478bd9Sstevel@tonic-gate 	subclass_lst_t *sc_list;
11637c478bd9Sstevel@tonic-gate 
11647c478bd9Sstevel@tonic-gate 	if (strcmp(class_name, EC_ALL) == 0) {
11657c478bd9Sstevel@tonic-gate 		remove_all_class(chan, sub_id);
11667c478bd9Sstevel@tonic-gate 		return;
11677c478bd9Sstevel@tonic-gate 	}
11687c478bd9Sstevel@tonic-gate 
11697c478bd9Sstevel@tonic-gate 	if ((c_list = find_class(chan, class_name)) == NULL) {
11707c478bd9Sstevel@tonic-gate 		return;
11717c478bd9Sstevel@tonic-gate 	}
11727c478bd9Sstevel@tonic-gate 
11737c478bd9Sstevel@tonic-gate 	sc_list = c_list->cl_subclass_list;
11747c478bd9Sstevel@tonic-gate 	while (sc_list != NULL) {
11757c478bd9Sstevel@tonic-gate 		sc_list->sl_num[sub_id] = 0;
11767c478bd9Sstevel@tonic-gate 		sc_list = sc_list->sl_next;
11777c478bd9Sstevel@tonic-gate 	}
11787c478bd9Sstevel@tonic-gate }
11797c478bd9Sstevel@tonic-gate 
11807c478bd9Sstevel@tonic-gate static int
insert_class(sysevent_channel_descriptor_t * chan,char * event_class,char ** event_subclass_lst,int subclass_num,uint32_t sub_id)11817c478bd9Sstevel@tonic-gate insert_class(sysevent_channel_descriptor_t *chan, char *event_class,
11827c478bd9Sstevel@tonic-gate 	char **event_subclass_lst, int subclass_num, uint32_t sub_id)
11837c478bd9Sstevel@tonic-gate {
11847c478bd9Sstevel@tonic-gate 	class_lst_t *c_list;
11857c478bd9Sstevel@tonic-gate 
11867c478bd9Sstevel@tonic-gate 	if (strcmp(event_class, EC_ALL) == 0) {
11877c478bd9Sstevel@tonic-gate 		insert_subclass(chan->scd_class_list_tbl[0],
11887c478bd9Sstevel@tonic-gate 		    event_subclass_lst, 1, sub_id);
11897c478bd9Sstevel@tonic-gate 		return (0);
11907c478bd9Sstevel@tonic-gate 	}
11917c478bd9Sstevel@tonic-gate 
11927c478bd9Sstevel@tonic-gate 	if (strlen(event_class) + 1 > MAX_CLASS_LEN)
11937c478bd9Sstevel@tonic-gate 		return (-1);
11947c478bd9Sstevel@tonic-gate 
11957c478bd9Sstevel@tonic-gate 	/* New class, add to the registration cache */
11967c478bd9Sstevel@tonic-gate 	if ((c_list = find_class(chan, event_class)) == NULL) {
11977c478bd9Sstevel@tonic-gate 		c_list = create_channel_registration(chan, event_class,
11987c478bd9Sstevel@tonic-gate 		    CLASS_HASH(event_class));
11997c478bd9Sstevel@tonic-gate 	}
12007c478bd9Sstevel@tonic-gate 
12017c478bd9Sstevel@tonic-gate 	/* Update the subclass list */
12027c478bd9Sstevel@tonic-gate 	insert_subclass(c_list, event_subclass_lst, subclass_num, sub_id);
12037c478bd9Sstevel@tonic-gate 
12047c478bd9Sstevel@tonic-gate 	return (0);
12057c478bd9Sstevel@tonic-gate }
12067c478bd9Sstevel@tonic-gate 
12077c478bd9Sstevel@tonic-gate static int
add_registration(sysevent_channel_descriptor_t * chan,uint32_t sub_id,char * nvlbuf,size_t nvlsize)12087c478bd9Sstevel@tonic-gate add_registration(sysevent_channel_descriptor_t *chan, uint32_t sub_id,
12097c478bd9Sstevel@tonic-gate 	char *nvlbuf, size_t nvlsize)
12107c478bd9Sstevel@tonic-gate {
12117c478bd9Sstevel@tonic-gate 	uint_t num_elem;
12127c478bd9Sstevel@tonic-gate 	char *event_class;
12137c478bd9Sstevel@tonic-gate 	char **event_list;
12147c478bd9Sstevel@tonic-gate 	nvlist_t *nvl;
12157c478bd9Sstevel@tonic-gate 	nvpair_t *nvpair = NULL;
12167c478bd9Sstevel@tonic-gate 
12177c478bd9Sstevel@tonic-gate 	if (nvlist_unpack(nvlbuf, nvlsize, &nvl, KM_SLEEP) != 0)
12187c478bd9Sstevel@tonic-gate 		return (-1);
12197c478bd9Sstevel@tonic-gate 
12207c478bd9Sstevel@tonic-gate 	if ((nvpair = nvlist_next_nvpair(nvl, nvpair)) == NULL) {
12217c478bd9Sstevel@tonic-gate 		nvlist_free(nvl);
12227c478bd9Sstevel@tonic-gate 		return (-1);
12237c478bd9Sstevel@tonic-gate 	}
12247c478bd9Sstevel@tonic-gate 
12257c478bd9Sstevel@tonic-gate 	if ((event_class = nvpair_name(nvpair)) == NULL) {
12267c478bd9Sstevel@tonic-gate 		nvlist_free(nvl);
12277c478bd9Sstevel@tonic-gate 		return (-1);
12287c478bd9Sstevel@tonic-gate 	}
12297c478bd9Sstevel@tonic-gate 	if (nvpair_value_string_array(nvpair, &event_list,
12307c478bd9Sstevel@tonic-gate 	    &num_elem) != 0) {
12317c478bd9Sstevel@tonic-gate 		nvlist_free(nvl);
12327c478bd9Sstevel@tonic-gate 		return (-1);
12337c478bd9Sstevel@tonic-gate 	}
12347c478bd9Sstevel@tonic-gate 
12357c478bd9Sstevel@tonic-gate 	if (insert_class(chan, event_class, event_list, num_elem, sub_id) < 0) {
12367c478bd9Sstevel@tonic-gate 		nvlist_free(nvl);
12377c478bd9Sstevel@tonic-gate 		return (-1);
12387c478bd9Sstevel@tonic-gate 	}
12397c478bd9Sstevel@tonic-gate 
12407c478bd9Sstevel@tonic-gate 	nvlist_free(nvl);
12417c478bd9Sstevel@tonic-gate 
12427c478bd9Sstevel@tonic-gate 	return (0);
12437c478bd9Sstevel@tonic-gate }
12447c478bd9Sstevel@tonic-gate 
12457c478bd9Sstevel@tonic-gate /*
12467c478bd9Sstevel@tonic-gate  * get_registration - Return the requested class hash chain
12477c478bd9Sstevel@tonic-gate  */
12487c478bd9Sstevel@tonic-gate static int
get_registration(sysevent_channel_descriptor_t * chan,char * databuf,uint32_t * bufsz,uint32_t class_index)12497c478bd9Sstevel@tonic-gate get_registration(sysevent_channel_descriptor_t *chan, char *databuf,
12507c478bd9Sstevel@tonic-gate 	uint32_t *bufsz, uint32_t class_index)
12517c478bd9Sstevel@tonic-gate {
12527c478bd9Sstevel@tonic-gate 	int num_classes = 0;
12537c478bd9Sstevel@tonic-gate 	char *nvlbuf = NULL;
12547c478bd9Sstevel@tonic-gate 	size_t nvlsize;
12557c478bd9Sstevel@tonic-gate 	nvlist_t *nvl;
12567c478bd9Sstevel@tonic-gate 	class_lst_t *clist;
12577c478bd9Sstevel@tonic-gate 	subclass_lst_t *sc_list;
12587c478bd9Sstevel@tonic-gate 
12597c478bd9Sstevel@tonic-gate 	if (class_index < 0 || class_index > CLASS_HASH_SZ)
12607c478bd9Sstevel@tonic-gate 		return (EINVAL);
12617c478bd9Sstevel@tonic-gate 
12627c478bd9Sstevel@tonic-gate 	if ((clist = chan->scd_class_list_tbl[class_index]) == NULL) {
12637c478bd9Sstevel@tonic-gate 		return (ENOENT);
12647c478bd9Sstevel@tonic-gate 	}
12657c478bd9Sstevel@tonic-gate 
12667c478bd9Sstevel@tonic-gate 	if (nvlist_alloc(&nvl, 0, 0) != 0) {
12677c478bd9Sstevel@tonic-gate 		return (EFAULT);
12687c478bd9Sstevel@tonic-gate 	}
12697c478bd9Sstevel@tonic-gate 
12707c478bd9Sstevel@tonic-gate 	while (clist != NULL) {
12717c478bd9Sstevel@tonic-gate 		if (nvlist_add_string(nvl, CLASS_NAME, clist->cl_name)
12727c478bd9Sstevel@tonic-gate 		    != 0) {
12737c478bd9Sstevel@tonic-gate 			nvlist_free(nvl);
12747c478bd9Sstevel@tonic-gate 			return (EFAULT);
12757c478bd9Sstevel@tonic-gate 		}
12767c478bd9Sstevel@tonic-gate 
12777c478bd9Sstevel@tonic-gate 		sc_list = clist->cl_subclass_list;
12787c478bd9Sstevel@tonic-gate 		while (sc_list != NULL) {
12797c478bd9Sstevel@tonic-gate 			if (nvlist_add_byte_array(nvl, sc_list->sl_name,
12807c478bd9Sstevel@tonic-gate 			    sc_list->sl_num, MAX_SUBSCRIBERS) != 0) {
12817c478bd9Sstevel@tonic-gate 				nvlist_free(nvl);
12827c478bd9Sstevel@tonic-gate 				return (EFAULT);
12837c478bd9Sstevel@tonic-gate 			}
12847c478bd9Sstevel@tonic-gate 			sc_list = sc_list->sl_next;
12857c478bd9Sstevel@tonic-gate 		}
12867c478bd9Sstevel@tonic-gate 		num_classes++;
12877c478bd9Sstevel@tonic-gate 		clist = clist->cl_next;
12887c478bd9Sstevel@tonic-gate 	}
12897c478bd9Sstevel@tonic-gate 
12907c478bd9Sstevel@tonic-gate 	if (num_classes == 0) {
12917c478bd9Sstevel@tonic-gate 		nvlist_free(nvl);
12927c478bd9Sstevel@tonic-gate 		return (ENOENT);
12937c478bd9Sstevel@tonic-gate 	}
12947c478bd9Sstevel@tonic-gate 
12957c478bd9Sstevel@tonic-gate 	if (nvlist_pack(nvl, &nvlbuf, &nvlsize, NV_ENCODE_NATIVE,
12967c478bd9Sstevel@tonic-gate 	    KM_SLEEP)
12977c478bd9Sstevel@tonic-gate 	    != 0) {
12987c478bd9Sstevel@tonic-gate 		nvlist_free(nvl);
12997c478bd9Sstevel@tonic-gate 		return (EFAULT);
13007c478bd9Sstevel@tonic-gate 	}
13017c478bd9Sstevel@tonic-gate 
13027c478bd9Sstevel@tonic-gate 	nvlist_free(nvl);
13037c478bd9Sstevel@tonic-gate 
13047c478bd9Sstevel@tonic-gate 	if (nvlsize > *bufsz) {
13057c478bd9Sstevel@tonic-gate 		kmem_free(nvlbuf, nvlsize);
13067c478bd9Sstevel@tonic-gate 		*bufsz = nvlsize;
13077c478bd9Sstevel@tonic-gate 		return (EAGAIN);
13087c478bd9Sstevel@tonic-gate 	}
13097c478bd9Sstevel@tonic-gate 
13107c478bd9Sstevel@tonic-gate 	bcopy(nvlbuf, databuf, nvlsize);
13117c478bd9Sstevel@tonic-gate 	kmem_free(nvlbuf, nvlsize);
13127c478bd9Sstevel@tonic-gate 
13137c478bd9Sstevel@tonic-gate 	return (0);
13147c478bd9Sstevel@tonic-gate }
13157c478bd9Sstevel@tonic-gate 
13167c478bd9Sstevel@tonic-gate /*
13177c478bd9Sstevel@tonic-gate  * log_sysevent_register - Register event subscriber for a particular
13187c478bd9Sstevel@tonic-gate  *		event channel.
13197c478bd9Sstevel@tonic-gate  */
13207c478bd9Sstevel@tonic-gate int
log_sysevent_register(char * channel_name,char * udatabuf,se_pubsub_t * udata)13217c478bd9Sstevel@tonic-gate log_sysevent_register(char *channel_name, char *udatabuf, se_pubsub_t *udata)
13227c478bd9Sstevel@tonic-gate {
13237c478bd9Sstevel@tonic-gate 	int error = 0;
13247c478bd9Sstevel@tonic-gate 	char *kchannel, *databuf = NULL;
13257c478bd9Sstevel@tonic-gate 	size_t bufsz;
13267c478bd9Sstevel@tonic-gate 	se_pubsub_t kdata;
13277c478bd9Sstevel@tonic-gate 	sysevent_channel_descriptor_t *chan;
13287c478bd9Sstevel@tonic-gate 
13297c478bd9Sstevel@tonic-gate 	if (copyin(udata, &kdata, sizeof (se_pubsub_t)) == -1) {
13307c478bd9Sstevel@tonic-gate 		return (EFAULT);
13317c478bd9Sstevel@tonic-gate 	}
13327c478bd9Sstevel@tonic-gate 	if (kdata.ps_channel_name_len == 0) {
13337c478bd9Sstevel@tonic-gate 		return (EINVAL);
13347c478bd9Sstevel@tonic-gate 	}
13357c478bd9Sstevel@tonic-gate 	kchannel = kmem_alloc(kdata.ps_channel_name_len, KM_SLEEP);
13367c478bd9Sstevel@tonic-gate 	if (copyin(channel_name, kchannel, kdata.ps_channel_name_len) == -1) {
13377c478bd9Sstevel@tonic-gate 		kmem_free(kchannel, kdata.ps_channel_name_len);
13387c478bd9Sstevel@tonic-gate 		return (EFAULT);
13397c478bd9Sstevel@tonic-gate 	}
13407c478bd9Sstevel@tonic-gate 	bufsz = kdata.ps_buflen;
13417c478bd9Sstevel@tonic-gate 	if (bufsz > 0) {
13427c478bd9Sstevel@tonic-gate 		databuf = kmem_alloc(bufsz, KM_SLEEP);
13437c478bd9Sstevel@tonic-gate 		if (copyin(udatabuf, databuf, bufsz) == -1) {
13447c478bd9Sstevel@tonic-gate 			kmem_free(kchannel, kdata.ps_channel_name_len);
13457c478bd9Sstevel@tonic-gate 			kmem_free(databuf, bufsz);
13467c478bd9Sstevel@tonic-gate 			return (EFAULT);
13477c478bd9Sstevel@tonic-gate 		}
13487c478bd9Sstevel@tonic-gate 	}
13497c478bd9Sstevel@tonic-gate 
13507c478bd9Sstevel@tonic-gate 	mutex_enter(&registered_channel_mutex);
13517c478bd9Sstevel@tonic-gate 	if (kdata.ps_op != SE_OPEN_REGISTRATION &&
13527c478bd9Sstevel@tonic-gate 	    kdata.ps_op != SE_CLOSE_REGISTRATION) {
13537c478bd9Sstevel@tonic-gate 		chan = get_channel(kchannel);
13547c478bd9Sstevel@tonic-gate 		if (chan == NULL) {
13557c478bd9Sstevel@tonic-gate 			mutex_exit(&registered_channel_mutex);
13567c478bd9Sstevel@tonic-gate 			kmem_free(kchannel, kdata.ps_channel_name_len);
13577c478bd9Sstevel@tonic-gate 			if (bufsz > 0)
13587c478bd9Sstevel@tonic-gate 				kmem_free(databuf, bufsz);
13597c478bd9Sstevel@tonic-gate 			return (ENOENT);
13607c478bd9Sstevel@tonic-gate 		}
13617c478bd9Sstevel@tonic-gate 	}
13627c478bd9Sstevel@tonic-gate 
13637c478bd9Sstevel@tonic-gate 	switch (kdata.ps_op) {
13647c478bd9Sstevel@tonic-gate 	case SE_OPEN_REGISTRATION:
13657c478bd9Sstevel@tonic-gate 		if (open_channel(kchannel) != 0) {
13667c478bd9Sstevel@tonic-gate 			error = ENOMEM;
13677c478bd9Sstevel@tonic-gate 			if (bufsz > 0)
13687c478bd9Sstevel@tonic-gate 				kmem_free(databuf, bufsz);
13697c478bd9Sstevel@tonic-gate 			kmem_free(kchannel, kdata.ps_channel_name_len);
13707c478bd9Sstevel@tonic-gate 		}
13717c478bd9Sstevel@tonic-gate 
13727c478bd9Sstevel@tonic-gate 		mutex_exit(&registered_channel_mutex);
13737c478bd9Sstevel@tonic-gate 		return (error);
13747c478bd9Sstevel@tonic-gate 	case SE_CLOSE_REGISTRATION:
13757c478bd9Sstevel@tonic-gate 		close_channel(kchannel);
13767c478bd9Sstevel@tonic-gate 		break;
13777c478bd9Sstevel@tonic-gate 	case SE_BIND_REGISTRATION:
13787c478bd9Sstevel@tonic-gate 		if ((kdata.ps_id = bind_common(chan, kdata.ps_type)) <= 0)
13797c478bd9Sstevel@tonic-gate 			error = EBUSY;
13807c478bd9Sstevel@tonic-gate 		break;
13817c478bd9Sstevel@tonic-gate 	case SE_UNBIND_REGISTRATION:
13827c478bd9Sstevel@tonic-gate 		(void) unbind_common(chan, kdata.ps_type, (id_t)kdata.ps_id);
13837c478bd9Sstevel@tonic-gate 		break;
13847c478bd9Sstevel@tonic-gate 	case SE_REGISTER:
13857c478bd9Sstevel@tonic-gate 		if (bufsz == 0) {
13867c478bd9Sstevel@tonic-gate 			error = EINVAL;
13877c478bd9Sstevel@tonic-gate 			break;
13887c478bd9Sstevel@tonic-gate 		}
13897c478bd9Sstevel@tonic-gate 		if (add_registration(chan, kdata.ps_id, databuf, bufsz) == -1)
13907c478bd9Sstevel@tonic-gate 			error = EINVAL;
13917c478bd9Sstevel@tonic-gate 		break;
13927c478bd9Sstevel@tonic-gate 	case SE_UNREGISTER:
13937c478bd9Sstevel@tonic-gate 		if (bufsz == 0) {
13947c478bd9Sstevel@tonic-gate 			error = EINVAL;
13957c478bd9Sstevel@tonic-gate 			break;
13967c478bd9Sstevel@tonic-gate 		}
13977c478bd9Sstevel@tonic-gate 		remove_class(chan, kdata.ps_id, databuf);
13987c478bd9Sstevel@tonic-gate 		break;
13997c478bd9Sstevel@tonic-gate 	case SE_CLEANUP:
14007c478bd9Sstevel@tonic-gate 		/* Cleanup the indicated subscriber or publisher */
14017c478bd9Sstevel@tonic-gate 		release_id(chan, kdata.ps_type, kdata.ps_id);
14027c478bd9Sstevel@tonic-gate 		break;
14037c478bd9Sstevel@tonic-gate 	case SE_GET_REGISTRATION:
14047c478bd9Sstevel@tonic-gate 		error = get_registration(chan, databuf,
14057c478bd9Sstevel@tonic-gate 		    &kdata.ps_buflen, kdata.ps_id);
14067c478bd9Sstevel@tonic-gate 		break;
14077c478bd9Sstevel@tonic-gate 	default:
14087c478bd9Sstevel@tonic-gate 		error = ENOTSUP;
14097c478bd9Sstevel@tonic-gate 	}
14107c478bd9Sstevel@tonic-gate 
14117c478bd9Sstevel@tonic-gate 	mutex_exit(&registered_channel_mutex);
14127c478bd9Sstevel@tonic-gate 
14137c478bd9Sstevel@tonic-gate 	kmem_free(kchannel, kdata.ps_channel_name_len);
14147c478bd9Sstevel@tonic-gate 
14157c478bd9Sstevel@tonic-gate 	if (bufsz > 0) {
14167c478bd9Sstevel@tonic-gate 		if (copyout(databuf, udatabuf, bufsz) == -1)
14177c478bd9Sstevel@tonic-gate 			error = EFAULT;
14187c478bd9Sstevel@tonic-gate 		kmem_free(databuf, bufsz);
14197c478bd9Sstevel@tonic-gate 	}
14207c478bd9Sstevel@tonic-gate 
14217c478bd9Sstevel@tonic-gate 	if (copyout(&kdata, udata, sizeof (se_pubsub_t)) == -1)
14227c478bd9Sstevel@tonic-gate 		return (EFAULT);
14237c478bd9Sstevel@tonic-gate 
14247c478bd9Sstevel@tonic-gate 	return (error);
14257c478bd9Sstevel@tonic-gate }
14267c478bd9Sstevel@tonic-gate 
14277c478bd9Sstevel@tonic-gate /*
14287c478bd9Sstevel@tonic-gate  * log_sysevent_copyout_data - Copyout event data to userland.
14297c478bd9Sstevel@tonic-gate  *			This is called from modctl(MODEVENTS, MODEVENTS_GETDATA)
14307c478bd9Sstevel@tonic-gate  *			The buffer size is always sufficient.
14317c478bd9Sstevel@tonic-gate  */
14327c478bd9Sstevel@tonic-gate int
log_sysevent_copyout_data(sysevent_id_t * eid,size_t ubuflen,caddr_t ubuf)14337c478bd9Sstevel@tonic-gate log_sysevent_copyout_data(sysevent_id_t *eid, size_t ubuflen, caddr_t ubuf)
14347c478bd9Sstevel@tonic-gate {
14357c478bd9Sstevel@tonic-gate 	int error = ENOENT;
14367c478bd9Sstevel@tonic-gate 	log_eventq_t *q;
14377c478bd9Sstevel@tonic-gate 	sysevent_t *ev;
14387c478bd9Sstevel@tonic-gate 	sysevent_id_t eid_copy;
14397c478bd9Sstevel@tonic-gate 
14407c478bd9Sstevel@tonic-gate 	/*
14417c478bd9Sstevel@tonic-gate 	 * Copy eid
14427c478bd9Sstevel@tonic-gate 	 */
14437c478bd9Sstevel@tonic-gate 	if (copyin(eid, &eid_copy, sizeof (sysevent_id_t)) == -1) {
14447c478bd9Sstevel@tonic-gate 		return (EFAULT);
14457c478bd9Sstevel@tonic-gate 	}
14467c478bd9Sstevel@tonic-gate 
14477c478bd9Sstevel@tonic-gate 	mutex_enter(&eventq_sent_mutex);
14487c478bd9Sstevel@tonic-gate 	q = log_eventq_sent;
14497c478bd9Sstevel@tonic-gate 
14507c478bd9Sstevel@tonic-gate 	/*
14517c478bd9Sstevel@tonic-gate 	 * Search for event buffer on the sent queue with matching
14527c478bd9Sstevel@tonic-gate 	 * event identifier
14537c478bd9Sstevel@tonic-gate 	 */
14547c478bd9Sstevel@tonic-gate 	while (q) {
14557c478bd9Sstevel@tonic-gate 		ev = (sysevent_t *)&q->arg.buf;
14567c478bd9Sstevel@tonic-gate 
14577c478bd9Sstevel@tonic-gate 		if (SE_TIME(ev) != eid_copy.eid_ts ||
14587c478bd9Sstevel@tonic-gate 		    SE_SEQ(ev) != eid_copy.eid_seq) {
14597c478bd9Sstevel@tonic-gate 			q = q->next;
14607c478bd9Sstevel@tonic-gate 			continue;
14617c478bd9Sstevel@tonic-gate 		}
14627c478bd9Sstevel@tonic-gate 
14637c478bd9Sstevel@tonic-gate 		if (ubuflen < SE_SIZE(ev)) {
14647c478bd9Sstevel@tonic-gate 			error = EFAULT;
14657c478bd9Sstevel@tonic-gate 			break;
14667c478bd9Sstevel@tonic-gate 		}
14677c478bd9Sstevel@tonic-gate 		if (copyout(ev, ubuf, SE_SIZE(ev)) != 0) {
14687c478bd9Sstevel@tonic-gate 			error = EFAULT;
14697c478bd9Sstevel@tonic-gate 			LOG_DEBUG((CE_NOTE, "Unable to retrieve system event "
14707c478bd9Sstevel@tonic-gate 			    "0x%" PRIx64 " from queue: EFAULT\n",
14717c478bd9Sstevel@tonic-gate 			    eid->eid_seq));
14727c478bd9Sstevel@tonic-gate 		} else {
14737c478bd9Sstevel@tonic-gate 			error = 0;
14747c478bd9Sstevel@tonic-gate 		}
14757c478bd9Sstevel@tonic-gate 		break;
14767c478bd9Sstevel@tonic-gate 	}
14777c478bd9Sstevel@tonic-gate 
14787c478bd9Sstevel@tonic-gate 	mutex_exit(&eventq_sent_mutex);
14797c478bd9Sstevel@tonic-gate 
14807c478bd9Sstevel@tonic-gate 	return (error);
14817c478bd9Sstevel@tonic-gate }
14827c478bd9Sstevel@tonic-gate 
14837c478bd9Sstevel@tonic-gate /*
14847c478bd9Sstevel@tonic-gate  * log_sysevent_free_data - Free kernel copy of the event buffer identified
14857c478bd9Sstevel@tonic-gate  *			by eid (must have already been sent).  Called from
14867c478bd9Sstevel@tonic-gate  *			modctl(MODEVENTS, MODEVENTS_FREEDATA).
14877c478bd9Sstevel@tonic-gate  */
14887c478bd9Sstevel@tonic-gate int
log_sysevent_free_data(sysevent_id_t * eid)14897c478bd9Sstevel@tonic-gate log_sysevent_free_data(sysevent_id_t *eid)
14907c478bd9Sstevel@tonic-gate {
14917c478bd9Sstevel@tonic-gate 	int error = ENOENT;
14927c478bd9Sstevel@tonic-gate 	sysevent_t *ev;
14937c478bd9Sstevel@tonic-gate 	log_eventq_t *q, *prev = NULL;
14947c478bd9Sstevel@tonic-gate 	sysevent_id_t eid_copy;
14957c478bd9Sstevel@tonic-gate 
14967c478bd9Sstevel@tonic-gate 	/*
14977c478bd9Sstevel@tonic-gate 	 * Copy eid
14987c478bd9Sstevel@tonic-gate 	 */
14997c478bd9Sstevel@tonic-gate 	if (copyin(eid, &eid_copy, sizeof (sysevent_id_t)) == -1) {
15007c478bd9Sstevel@tonic-gate 		return (EFAULT);
15017c478bd9Sstevel@tonic-gate 	}
15027c478bd9Sstevel@tonic-gate 
15037c478bd9Sstevel@tonic-gate 	mutex_enter(&eventq_sent_mutex);
15047c478bd9Sstevel@tonic-gate 	q = log_eventq_sent;
15057c478bd9Sstevel@tonic-gate 
15067c478bd9Sstevel@tonic-gate 	/*
15077c478bd9Sstevel@tonic-gate 	 * Look for the event to be freed on the sent queue.  Due to delayed
15087c478bd9Sstevel@tonic-gate 	 * processing of the event, it may not be on the sent queue yet.
15097c478bd9Sstevel@tonic-gate 	 * It is up to the user to retry the free operation to ensure that the
15107c478bd9Sstevel@tonic-gate 	 * event is properly freed.
15117c478bd9Sstevel@tonic-gate 	 */
15127c478bd9Sstevel@tonic-gate 	while (q) {
15137c478bd9Sstevel@tonic-gate 		ev = (sysevent_t *)&q->arg.buf;
15147c478bd9Sstevel@tonic-gate 
15157c478bd9Sstevel@tonic-gate 		if (SE_TIME(ev) != eid_copy.eid_ts ||
15167c478bd9Sstevel@tonic-gate 		    SE_SEQ(ev) != eid_copy.eid_seq) {
15177c478bd9Sstevel@tonic-gate 			prev = q;
15187c478bd9Sstevel@tonic-gate 			q = q->next;
15197c478bd9Sstevel@tonic-gate 			continue;
15207c478bd9Sstevel@tonic-gate 		}
15217c478bd9Sstevel@tonic-gate 		/*
15227c478bd9Sstevel@tonic-gate 		 * Take it out of log_eventq_sent and free it
15237c478bd9Sstevel@tonic-gate 		 */
15247c478bd9Sstevel@tonic-gate 		if (prev) {
15257c478bd9Sstevel@tonic-gate 			prev->next = q->next;
15267c478bd9Sstevel@tonic-gate 		} else {
15277c478bd9Sstevel@tonic-gate 			log_eventq_sent = q->next;
15287c478bd9Sstevel@tonic-gate 		}
15297c478bd9Sstevel@tonic-gate 		free_packed_event(ev);
15307c478bd9Sstevel@tonic-gate 		error = 0;
15317c478bd9Sstevel@tonic-gate 		break;
15327c478bd9Sstevel@tonic-gate 	}
15337c478bd9Sstevel@tonic-gate 
15347c478bd9Sstevel@tonic-gate 	mutex_exit(&eventq_sent_mutex);
15357c478bd9Sstevel@tonic-gate 
15367c478bd9Sstevel@tonic-gate 	return (error);
15377c478bd9Sstevel@tonic-gate }
15387c478bd9Sstevel@tonic-gate 
15397c478bd9Sstevel@tonic-gate /*
15407c478bd9Sstevel@tonic-gate  * log_sysevent_flushq - Begin or resume event buffer delivery.  If neccessary,
15417c478bd9Sstevel@tonic-gate  *			create log_event_deliver thread or wake it up
15427c478bd9Sstevel@tonic-gate  */
15437c478bd9Sstevel@tonic-gate /*ARGSUSED*/
15447c478bd9Sstevel@tonic-gate void
log_sysevent_flushq(int cmd,uint_t flag)15457c478bd9Sstevel@tonic-gate log_sysevent_flushq(int cmd, uint_t flag)
15467c478bd9Sstevel@tonic-gate {
15477c478bd9Sstevel@tonic-gate 	mutex_enter(&eventq_head_mutex);
15487c478bd9Sstevel@tonic-gate 
15497c478bd9Sstevel@tonic-gate 	/*
15507c478bd9Sstevel@tonic-gate 	 * Start the event delivery thread
15517c478bd9Sstevel@tonic-gate 	 * Mark the upcall status as active since we should
15527c478bd9Sstevel@tonic-gate 	 * now be able to begin emptying the queue normally.
15537c478bd9Sstevel@tonic-gate 	 */
15547c478bd9Sstevel@tonic-gate 	if (!async_thread) {
15557c478bd9Sstevel@tonic-gate 		sysevent_upcall_status = 0;
15567c478bd9Sstevel@tonic-gate 		sysevent_daemon_init = 1;
15577c478bd9Sstevel@tonic-gate 		setup_ddi_poststartup();
15587c478bd9Sstevel@tonic-gate 		async_thread = thread_create(NULL, 0, log_event_deliver,
15597c478bd9Sstevel@tonic-gate 		    NULL, 0, &p0, TS_RUN, minclsyspri);
15607c478bd9Sstevel@tonic-gate 	}
15617c478bd9Sstevel@tonic-gate 
15627c478bd9Sstevel@tonic-gate 	log_event_delivery = LOGEVENT_DELIVERY_CONT;
15637c478bd9Sstevel@tonic-gate 	cv_signal(&log_event_cv);
15647c478bd9Sstevel@tonic-gate 	mutex_exit(&eventq_head_mutex);
15657c478bd9Sstevel@tonic-gate }
15667c478bd9Sstevel@tonic-gate 
15677c478bd9Sstevel@tonic-gate /*
15687c478bd9Sstevel@tonic-gate  * log_sysevent_filename - Called by syseventd via
15697c478bd9Sstevel@tonic-gate  *			modctl(MODEVENTS, MODEVENTS_SET_DOOR_UPCALL_FILENAME)
15707c478bd9Sstevel@tonic-gate  *			to subsequently bind the event_door.
15717c478bd9Sstevel@tonic-gate  *
15727c478bd9Sstevel@tonic-gate  *			This routine is called everytime syseventd (re)starts
15737c478bd9Sstevel@tonic-gate  *			and must therefore replay any events buffers that have
15747c478bd9Sstevel@tonic-gate  *			been sent but not freed.
15757c478bd9Sstevel@tonic-gate  *
15767c478bd9Sstevel@tonic-gate  *			Event buffer delivery begins after a call to
15777c478bd9Sstevel@tonic-gate  *			log_sysevent_flushq().
15787c478bd9Sstevel@tonic-gate  */
15797c478bd9Sstevel@tonic-gate int
log_sysevent_filename(char * file)15807c478bd9Sstevel@tonic-gate log_sysevent_filename(char *file)
15817c478bd9Sstevel@tonic-gate {
1582*e5dc7eacSMarcel Telka 	mutex_enter(&event_door_mutex);
1583*e5dc7eacSMarcel Telka 
1584*e5dc7eacSMarcel Telka 	(void) strlcpy(logevent_door_upcall_filename, file,
1585*e5dc7eacSMarcel Telka 	    sizeof (logevent_door_upcall_filename));
1586*e5dc7eacSMarcel Telka 
15877c478bd9Sstevel@tonic-gate 	/* Unbind old event door */
1588*e5dc7eacSMarcel Telka 	if (event_door != NULL)
15897c478bd9Sstevel@tonic-gate 		door_ki_rele(event_door);
1590*e5dc7eacSMarcel Telka 	/* Establish door connection with user event daemon (syseventd) */
1591*e5dc7eacSMarcel Telka 	if (door_ki_open(logevent_door_upcall_filename, &event_door) != 0)
15927c478bd9Sstevel@tonic-gate 		event_door = NULL;
1593*e5dc7eacSMarcel Telka 
1594*e5dc7eacSMarcel Telka 	mutex_exit(&event_door_mutex);
15957c478bd9Sstevel@tonic-gate 
15967c478bd9Sstevel@tonic-gate 	/*
15977c478bd9Sstevel@tonic-gate 	 * We are called when syseventd restarts. Move all sent, but
15987c478bd9Sstevel@tonic-gate 	 * not committed events from log_eventq_sent to log_eventq_head.
15997c478bd9Sstevel@tonic-gate 	 * Do it in proper order to maintain increasing event id.
16007c478bd9Sstevel@tonic-gate 	 */
16017c478bd9Sstevel@tonic-gate 	mutex_enter(&eventq_head_mutex);
16027c478bd9Sstevel@tonic-gate 
16037c478bd9Sstevel@tonic-gate 	mutex_enter(&eventq_sent_mutex);
16047c478bd9Sstevel@tonic-gate 	while (log_eventq_sent) {
16057c478bd9Sstevel@tonic-gate 		log_eventq_t *tmp = log_eventq_sent->next;
16067c478bd9Sstevel@tonic-gate 		log_eventq_sent->next = log_eventq_head;
16077c478bd9Sstevel@tonic-gate 		if (log_eventq_head == NULL) {
16087c478bd9Sstevel@tonic-gate 			ASSERT(log_eventq_cnt == 0);
16097c478bd9Sstevel@tonic-gate 			log_eventq_tail = log_eventq_sent;
16107c478bd9Sstevel@tonic-gate 			log_eventq_tail->next = NULL;
16117c478bd9Sstevel@tonic-gate 		} else if (log_eventq_head == log_eventq_tail) {
16127c478bd9Sstevel@tonic-gate 			ASSERT(log_eventq_cnt == 1);
16137c478bd9Sstevel@tonic-gate 			ASSERT(log_eventq_head->next == NULL);
16147c478bd9Sstevel@tonic-gate 			ASSERT(log_eventq_tail->next == NULL);
16157c478bd9Sstevel@tonic-gate 		}
16167c478bd9Sstevel@tonic-gate 		log_eventq_head = log_eventq_sent;
16177c478bd9Sstevel@tonic-gate 		log_eventq_sent = tmp;
16187c478bd9Sstevel@tonic-gate 		log_eventq_cnt++;
16197c478bd9Sstevel@tonic-gate 	}
16207c478bd9Sstevel@tonic-gate 	mutex_exit(&eventq_sent_mutex);
16217c478bd9Sstevel@tonic-gate 	mutex_exit(&eventq_head_mutex);
16227c478bd9Sstevel@tonic-gate 
16237c478bd9Sstevel@tonic-gate 	return (0);
16247c478bd9Sstevel@tonic-gate }
16257c478bd9Sstevel@tonic-gate 
16267c478bd9Sstevel@tonic-gate /*
16277c478bd9Sstevel@tonic-gate  * queue_sysevent - queue an event buffer
16287c478bd9Sstevel@tonic-gate  */
16297c478bd9Sstevel@tonic-gate static int
queue_sysevent(sysevent_t * ev,sysevent_id_t * eid,int flag)16307c478bd9Sstevel@tonic-gate queue_sysevent(sysevent_t *ev, sysevent_id_t *eid, int flag)
16317c478bd9Sstevel@tonic-gate {
16327c478bd9Sstevel@tonic-gate 	log_eventq_t *q;
16337c478bd9Sstevel@tonic-gate 
16347c478bd9Sstevel@tonic-gate 	ASSERT(flag == SE_SLEEP || flag == SE_NOSLEEP);
16357c478bd9Sstevel@tonic-gate 
1636e04145d0Seschrock 	DTRACE_SYSEVENT2(post, evch_bind_t *, NULL, sysevent_impl_t *, ev);
1637e04145d0Seschrock 
16387c478bd9Sstevel@tonic-gate restart:
16397c478bd9Sstevel@tonic-gate 
16407c478bd9Sstevel@tonic-gate 	/* Max Q size exceeded */
16417c478bd9Sstevel@tonic-gate 	mutex_enter(&event_qfull_mutex);
16427c478bd9Sstevel@tonic-gate 	if (sysevent_daemon_init && log_eventq_cnt >= logevent_max_q_sz) {
16437c478bd9Sstevel@tonic-gate 		/*
16447c478bd9Sstevel@tonic-gate 		 * If queue full and transport down, return no transport
16457c478bd9Sstevel@tonic-gate 		 */
16467c478bd9Sstevel@tonic-gate 		if (sysevent_upcall_status != 0) {
16477c478bd9Sstevel@tonic-gate 			mutex_exit(&event_qfull_mutex);
16487c478bd9Sstevel@tonic-gate 			free_packed_event(ev);
16497c478bd9Sstevel@tonic-gate 			eid->eid_seq = UINT64_C(0);
16507c478bd9Sstevel@tonic-gate 			eid->eid_ts = INT64_C(0);
16517c478bd9Sstevel@tonic-gate 			return (SE_NO_TRANSPORT);
16527c478bd9Sstevel@tonic-gate 		}
16537c478bd9Sstevel@tonic-gate 		if (flag == SE_NOSLEEP) {
16547c478bd9Sstevel@tonic-gate 			mutex_exit(&event_qfull_mutex);
16557c478bd9Sstevel@tonic-gate 			free_packed_event(ev);
16567c478bd9Sstevel@tonic-gate 			eid->eid_seq = UINT64_C(0);
16577c478bd9Sstevel@tonic-gate 			eid->eid_ts = INT64_C(0);
16587c478bd9Sstevel@tonic-gate 			return (SE_EQSIZE);
16597c478bd9Sstevel@tonic-gate 		}
16607c478bd9Sstevel@tonic-gate 		event_qfull_blocked++;
16617c478bd9Sstevel@tonic-gate 		cv_wait(&event_qfull_cv, &event_qfull_mutex);
16627c478bd9Sstevel@tonic-gate 		event_qfull_blocked--;
16637c478bd9Sstevel@tonic-gate 		mutex_exit(&event_qfull_mutex);
16647c478bd9Sstevel@tonic-gate 		goto restart;
16657c478bd9Sstevel@tonic-gate 	}
16667c478bd9Sstevel@tonic-gate 	mutex_exit(&event_qfull_mutex);
16677c478bd9Sstevel@tonic-gate 
16687c478bd9Sstevel@tonic-gate 	mutex_enter(&eventq_head_mutex);
16697c478bd9Sstevel@tonic-gate 
16707c478bd9Sstevel@tonic-gate 	/* Time stamp and assign ID */
16717c478bd9Sstevel@tonic-gate 	SE_SEQ(ev) = eid->eid_seq = atomic_add_64_nv(&kernel_event_id,
16727c478bd9Sstevel@tonic-gate 	    (uint64_t)1);
16737c478bd9Sstevel@tonic-gate 	SE_TIME(ev) = eid->eid_ts = gethrtime();
16747c478bd9Sstevel@tonic-gate 
16757c478bd9Sstevel@tonic-gate 	LOG_DEBUG1((CE_CONT, "log_sysevent: class=%d type=%d id=0x%llx\n",
16767c478bd9Sstevel@tonic-gate 	    SE_CLASS(ev), SE_SUBCLASS(ev), (longlong_t)SE_SEQ(ev)));
16777c478bd9Sstevel@tonic-gate 
16787c478bd9Sstevel@tonic-gate 	/*
16797c478bd9Sstevel@tonic-gate 	 * Put event on eventq
16807c478bd9Sstevel@tonic-gate 	 */
16817c478bd9Sstevel@tonic-gate 	q = (log_eventq_t *)((caddr_t)ev - offsetof(log_eventq_t, arg.buf));
16827c478bd9Sstevel@tonic-gate 	q->next = NULL;
16837c478bd9Sstevel@tonic-gate 	if (log_eventq_head == NULL) {
16847c478bd9Sstevel@tonic-gate 		ASSERT(log_eventq_cnt == 0);
16857c478bd9Sstevel@tonic-gate 		log_eventq_head = q;
16867c478bd9Sstevel@tonic-gate 		log_eventq_tail = q;
16877c478bd9Sstevel@tonic-gate 	} else {
16887c478bd9Sstevel@tonic-gate 		if (log_eventq_head == log_eventq_tail) {
16897c478bd9Sstevel@tonic-gate 			ASSERT(log_eventq_cnt == 1);
16907c478bd9Sstevel@tonic-gate 			ASSERT(log_eventq_head->next == NULL);
16917c478bd9Sstevel@tonic-gate 			ASSERT(log_eventq_tail->next == NULL);
16927c478bd9Sstevel@tonic-gate 		}
16937c478bd9Sstevel@tonic-gate 		log_eventq_tail->next = q;
16947c478bd9Sstevel@tonic-gate 		log_eventq_tail = q;
16957c478bd9Sstevel@tonic-gate 	}
16967c478bd9Sstevel@tonic-gate 	log_eventq_cnt++;
16977c478bd9Sstevel@tonic-gate 
16987c478bd9Sstevel@tonic-gate 	/* Signal event delivery thread */
16997c478bd9Sstevel@tonic-gate 	if (log_eventq_cnt == 1) {
17007c478bd9Sstevel@tonic-gate 		cv_signal(&log_event_cv);
17017c478bd9Sstevel@tonic-gate 	}
17027c478bd9Sstevel@tonic-gate 	mutex_exit(&eventq_head_mutex);
17037c478bd9Sstevel@tonic-gate 
17047c478bd9Sstevel@tonic-gate 	return (0);
17057c478bd9Sstevel@tonic-gate }
17067c478bd9Sstevel@tonic-gate 
17077c478bd9Sstevel@tonic-gate /*
17087c478bd9Sstevel@tonic-gate  * log_sysevent - kernel system event logger.
17097c478bd9Sstevel@tonic-gate  *
17107c478bd9Sstevel@tonic-gate  * Returns SE_ENOMEM if buf allocation failed or SE_EQSIZE if the
17117c478bd9Sstevel@tonic-gate  * maximum event queue size will be exceeded
17127c478bd9Sstevel@tonic-gate  * Returns 0 for successfully queued event buffer
17137c478bd9Sstevel@tonic-gate  */
17147c478bd9Sstevel@tonic-gate int
log_sysevent(sysevent_t * ev,int flag,sysevent_id_t * eid)17157c478bd9Sstevel@tonic-gate log_sysevent(sysevent_t *ev, int flag, sysevent_id_t *eid)
17167c478bd9Sstevel@tonic-gate {
17177c478bd9Sstevel@tonic-gate 	sysevent_t *ev_copy;
17187c478bd9Sstevel@tonic-gate 	int rval;
17197c478bd9Sstevel@tonic-gate 
17207c478bd9Sstevel@tonic-gate 	ASSERT(flag == SE_SLEEP || flag == SE_NOSLEEP);
17217c478bd9Sstevel@tonic-gate 	ASSERT(!(flag == SE_SLEEP && servicing_interrupt()));
17227c478bd9Sstevel@tonic-gate 
17237c478bd9Sstevel@tonic-gate 	ev_copy = se_repack(ev, flag);
17247c478bd9Sstevel@tonic-gate 	if (ev_copy == NULL) {
17257c478bd9Sstevel@tonic-gate 		ASSERT(flag == SE_NOSLEEP);
17267c478bd9Sstevel@tonic-gate 		return (SE_ENOMEM);
17277c478bd9Sstevel@tonic-gate 	}
17287c478bd9Sstevel@tonic-gate 	rval = queue_sysevent(ev_copy, eid, flag);
17297c478bd9Sstevel@tonic-gate 	ASSERT(rval == 0 || rval == SE_ENOMEM || rval == SE_EQSIZE ||
17307c478bd9Sstevel@tonic-gate 	    rval == SE_NO_TRANSPORT);
17317c478bd9Sstevel@tonic-gate 	ASSERT(!(flag == SE_SLEEP && (rval == SE_EQSIZE || rval == SE_ENOMEM)));
17327c478bd9Sstevel@tonic-gate 	return (rval);
17337c478bd9Sstevel@tonic-gate }
17347c478bd9Sstevel@tonic-gate 
17357c478bd9Sstevel@tonic-gate /*
17367c478bd9Sstevel@tonic-gate  * log_usr_sysevent - user system event logger
17377c478bd9Sstevel@tonic-gate  *			Private to devfsadm and accessible only via
17387c478bd9Sstevel@tonic-gate  *			modctl(MODEVENTS, MODEVENTS_POST_EVENT)
17397c478bd9Sstevel@tonic-gate  */
17407c478bd9Sstevel@tonic-gate int
log_usr_sysevent(sysevent_t * ev,int ev_size,sysevent_id_t * eid)17417c478bd9Sstevel@tonic-gate log_usr_sysevent(sysevent_t *ev, int ev_size, sysevent_id_t *eid)
17427c478bd9Sstevel@tonic-gate {
17437c478bd9Sstevel@tonic-gate 	int ret, copy_sz;
17447c478bd9Sstevel@tonic-gate 	sysevent_t *ev_copy;
17457c478bd9Sstevel@tonic-gate 	sysevent_id_t new_eid;
17467c478bd9Sstevel@tonic-gate 	log_eventq_t *qcopy;
17477c478bd9Sstevel@tonic-gate 
17487c478bd9Sstevel@tonic-gate 	copy_sz = ev_size + offsetof(log_eventq_t, arg) +
17497c478bd9Sstevel@tonic-gate 	    offsetof(log_event_upcall_arg_t, buf);
17507c478bd9Sstevel@tonic-gate 	qcopy = kmem_zalloc(copy_sz, KM_SLEEP);
17517c478bd9Sstevel@tonic-gate 	ev_copy = (sysevent_t *)&qcopy->arg.buf;
17527c478bd9Sstevel@tonic-gate 
17537c478bd9Sstevel@tonic-gate 	/*
17547c478bd9Sstevel@tonic-gate 	 * Copy event
17557c478bd9Sstevel@tonic-gate 	 */
17567c478bd9Sstevel@tonic-gate 	if (copyin(ev, ev_copy, ev_size) == -1) {
17577c478bd9Sstevel@tonic-gate 		kmem_free(qcopy, copy_sz);
17587c478bd9Sstevel@tonic-gate 		return (EFAULT);
17597c478bd9Sstevel@tonic-gate 	}
17607c478bd9Sstevel@tonic-gate 
17617c478bd9Sstevel@tonic-gate 	if ((ret = queue_sysevent(ev_copy, &new_eid, SE_NOSLEEP)) != 0) {
17627c478bd9Sstevel@tonic-gate 		if (ret == SE_ENOMEM || ret == SE_EQSIZE)
17637c478bd9Sstevel@tonic-gate 			return (EAGAIN);
17647c478bd9Sstevel@tonic-gate 		else
17657c478bd9Sstevel@tonic-gate 			return (EIO);
17667c478bd9Sstevel@tonic-gate 	}
17677c478bd9Sstevel@tonic-gate 
17687c478bd9Sstevel@tonic-gate 	if (copyout(&new_eid, eid, sizeof (sysevent_id_t)) == -1) {
17697c478bd9Sstevel@tonic-gate 		return (EFAULT);
17707c478bd9Sstevel@tonic-gate 	}
17717c478bd9Sstevel@tonic-gate 
17727c478bd9Sstevel@tonic-gate 	return (0);
17737c478bd9Sstevel@tonic-gate }
17747c478bd9Sstevel@tonic-gate 
17757c478bd9Sstevel@tonic-gate 
17767c478bd9Sstevel@tonic-gate 
17777c478bd9Sstevel@tonic-gate int
ddi_log_sysevent(dev_info_t * dip,char * vendor,char * class,char * subclass,nvlist_t * attr_list,sysevent_id_t * eidp,int sleep_flag)17787c478bd9Sstevel@tonic-gate ddi_log_sysevent(
17797c478bd9Sstevel@tonic-gate 	dev_info_t		*dip,
17807c478bd9Sstevel@tonic-gate 	char			*vendor,
17817c478bd9Sstevel@tonic-gate 	char			*class,
17827c478bd9Sstevel@tonic-gate 	char			*subclass,
17837c478bd9Sstevel@tonic-gate 	nvlist_t		*attr_list,
17847c478bd9Sstevel@tonic-gate 	sysevent_id_t		*eidp,
17857c478bd9Sstevel@tonic-gate 	int			sleep_flag)
17867c478bd9Sstevel@tonic-gate {
17877c478bd9Sstevel@tonic-gate 	sysevent_attr_list_t	*list = (sysevent_attr_list_t *)attr_list;
17887c478bd9Sstevel@tonic-gate 	char			pubstr[32];
17897c478bd9Sstevel@tonic-gate 	sysevent_t		*event;
17907c478bd9Sstevel@tonic-gate 	sysevent_id_t		eid;
17917c478bd9Sstevel@tonic-gate 	const char		*drvname;
17927c478bd9Sstevel@tonic-gate 	char			*publisher;
17937c478bd9Sstevel@tonic-gate 	int			se_flag;
17947c478bd9Sstevel@tonic-gate 	int			rval;
17957c478bd9Sstevel@tonic-gate 	int			n;
17967c478bd9Sstevel@tonic-gate 
17977c478bd9Sstevel@tonic-gate 	if (sleep_flag == DDI_SLEEP && servicing_interrupt()) {
17987c478bd9Sstevel@tonic-gate 		cmn_err(CE_NOTE, "!ddi_log_syevent: driver %s%d - cannot queue "
17997c478bd9Sstevel@tonic-gate 		    "event from interrupt context with sleep semantics\n",
18007c478bd9Sstevel@tonic-gate 		    ddi_driver_name(dip), ddi_get_instance(dip));
18017c478bd9Sstevel@tonic-gate 		return (DDI_ECONTEXT);
18027c478bd9Sstevel@tonic-gate 	}
18037c478bd9Sstevel@tonic-gate 
18047c478bd9Sstevel@tonic-gate 	drvname = ddi_driver_name(dip);
18057c478bd9Sstevel@tonic-gate 	n = strlen(vendor) + strlen(drvname) + 7;
18067c478bd9Sstevel@tonic-gate 	if (n < sizeof (pubstr)) {
18077c478bd9Sstevel@tonic-gate 		publisher = pubstr;
18087c478bd9Sstevel@tonic-gate 	} else {
18097c478bd9Sstevel@tonic-gate 		publisher = kmem_alloc(n,
18107c478bd9Sstevel@tonic-gate 		    (sleep_flag == DDI_SLEEP) ? KM_SLEEP : KM_NOSLEEP);
18117c478bd9Sstevel@tonic-gate 		if (publisher == NULL) {
18127c478bd9Sstevel@tonic-gate 			return (DDI_ENOMEM);
18137c478bd9Sstevel@tonic-gate 		}
18147c478bd9Sstevel@tonic-gate 	}
18157c478bd9Sstevel@tonic-gate 	(void) strcpy(publisher, vendor);
18167c478bd9Sstevel@tonic-gate 	(void) strcat(publisher, ":kern:");
18177c478bd9Sstevel@tonic-gate 	(void) strcat(publisher, drvname);
18187c478bd9Sstevel@tonic-gate 
18197c478bd9Sstevel@tonic-gate 	se_flag = (sleep_flag == DDI_SLEEP) ? SE_SLEEP : SE_NOSLEEP;
18207c478bd9Sstevel@tonic-gate 	event = sysevent_alloc(class, subclass, publisher, se_flag);
18217c478bd9Sstevel@tonic-gate 
18227c478bd9Sstevel@tonic-gate 	if (publisher != pubstr) {
18237c478bd9Sstevel@tonic-gate 		kmem_free(publisher, n);
18247c478bd9Sstevel@tonic-gate 	}
18257c478bd9Sstevel@tonic-gate 
18267c478bd9Sstevel@tonic-gate 	if (event == NULL) {
18277c478bd9Sstevel@tonic-gate 		return (DDI_ENOMEM);
18287c478bd9Sstevel@tonic-gate 	}
18297c478bd9Sstevel@tonic-gate 
18307c478bd9Sstevel@tonic-gate 	if (list) {
18317c478bd9Sstevel@tonic-gate 		(void) sysevent_attach_attributes(event, list);
18327c478bd9Sstevel@tonic-gate 	}
18337c478bd9Sstevel@tonic-gate 
18347c478bd9Sstevel@tonic-gate 	rval = log_sysevent(event, se_flag, &eid);
18357c478bd9Sstevel@tonic-gate 	if (list) {
18367c478bd9Sstevel@tonic-gate 		sysevent_detach_attributes(event);
18377c478bd9Sstevel@tonic-gate 	}
18387c478bd9Sstevel@tonic-gate 	sysevent_free(event);
18397c478bd9Sstevel@tonic-gate 	if (rval == 0) {
18407c478bd9Sstevel@tonic-gate 		if (eidp) {
18417c478bd9Sstevel@tonic-gate 			eidp->eid_seq = eid.eid_seq;
18427c478bd9Sstevel@tonic-gate 			eidp->eid_ts = eid.eid_ts;
18437c478bd9Sstevel@tonic-gate 		}
18447c478bd9Sstevel@tonic-gate 		return (DDI_SUCCESS);
18457c478bd9Sstevel@tonic-gate 	}
18467c478bd9Sstevel@tonic-gate 	if (rval == SE_NO_TRANSPORT)
18477c478bd9Sstevel@tonic-gate 		return (DDI_ETRANSPORT);
18487c478bd9Sstevel@tonic-gate 
18497c478bd9Sstevel@tonic-gate 	ASSERT(rval == SE_ENOMEM || rval == SE_EQSIZE);
18507c478bd9Sstevel@tonic-gate 	return ((rval == SE_ENOMEM) ? DDI_ENOMEM : DDI_EBUSY);
18517c478bd9Sstevel@tonic-gate }
18527c478bd9Sstevel@tonic-gate 
18537c478bd9Sstevel@tonic-gate uint64_t
log_sysevent_new_id(void)1854f6e214c7SGavin Maltby log_sysevent_new_id(void)
18557c478bd9Sstevel@tonic-gate {
18567c478bd9Sstevel@tonic-gate 	return (atomic_add_64_nv(&kernel_event_id, (uint64_t)1));
18577c478bd9Sstevel@tonic-gate }
1858