1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 /*
27 * FMD Transport Subsystem
28 *
29 * A transport module uses some underlying mechanism to transport events.
30 * This mechanism may use any underlying link-layer protocol and may support
31 * additional link-layer packets unrelated to FMA. Some appropriate link-
32 * layer mechanism to create the underlying connection is expected to be
33 * called prior to calling fmd_xprt_open() itself. Alternatively, a transport
34 * may be created in the suspended state by specifying the FMD_XPRT_SUSPENDED
35 * flag as part of the call to fmd_xprt_open(), and then may be resumed later.
36 * The underlying transport mechanism is *required* to provide ordering: that
37 * is, the sequences of bytes written across the transport must be read by
38 * the remote peer in the order that they are written, even across separate
39 * calls to fmdo_send(). As an example, the Internet TCP protocol would be
40 * a valid transport as it guarantees ordering, whereas the Internet UDP
41 * protocol would not because UDP datagrams may be delivered in any order
42 * as a result of delays introduced when datagrams pass through routers.
43 *
44 * Similar to sending events, a transport module receives events that are from
45 * its peer remote endpoint using some transport-specific mechanism that is
46 * unknown to FMD. As each event is received, the transport module is
47 * responsible for constructing a valid nvlist_t object from the data and then
48 * calling fmd_xprt_post() to post the event to the containing FMD's dispatch
49 * queue, making it available to all local modules that are not transport
50 * modules that have subscribed to the event.
51 *
52 * The following state machine is used for each transport. The initial state
53 * is either SYN, ACK, or RUN, depending on the flags specified to xprt_create.
54 *
55 * FMD_XPRT_ACCEPT !FMD_XPRT_ACCEPT
56 * | |
57 * waiting +--v--+ +--v--+ waiting
58 * for syn | SYN |--+ --+| ACK | for ack
59 * event +-----+ \ / +-----+ event
60 * | \ / |
61 * drop all +--v--+ X +--v--+ send subscriptions,
62 * events | ERR |<---+ +--->| SUB | recv subscriptions,
63 * +-----+ +-----+ wait for run event
64 * ^ |
65 * | +-----+ |
66 * +-----| RUN |<----+
67 * +--^--+
68 * |
69 * FMD_XPRT_RDONLY
70 *
71 * When fmd_xprt_open() is called without FMD_XPRT_ACCEPT, the Common Transport
72 * Layer enqueues a "syn" event for the module in its event queue and sets the
73 * state to ACK. In state ACK, we are waiting for the transport to get an
74 * "ack" event and call fmd_xprt_post() on this event. Other events will be
75 * discarded. If an "ack" is received, we transition to state SUB. If a
76 * configurable timeout occurs or if the "ack" is invalid (e.g. invalid version
77 * exchange), we transition to state ERR. Once in state ERR, no further
78 * operations are valid except fmd_xprt_close() and fmd_xprt_error() will
79 * return a non-zero value to the caller indicating the transport has failed.
80 *
81 * When fmd_xprt_open() is called with FMD_XPRT_ACCEPT, the Common Transport
82 * Layer assumes this transport is being used to accept a virtual connection
83 * from a remote peer that is sending a "syn", and sets the initial state to
84 * SYN. In this state, the transport waits for a "syn" event, validates it,
85 * and then transitions to state SUB if it is valid or state ERR if it is not.
86 *
87 * Once in state SUB, the transport module is expected to receive a sequence of
88 * zero or more "subscribe" events from the remote peer, followed by a "run"
89 * event. Once in state RUN, the transport is active and any events can be
90 * sent or received. The transport module is free to call fmd_xprt_close()
91 * from any state. The fmd_xprt_error() function will return zero if the
92 * transport is not in the ERR state, or non-zero if it is in the ERR state.
93 *
94 * Once the state machine reaches RUN, other FMA protocol events can be sent
95 * and received across the transport in addition to the various control events.
96 *
97 * Table of Common Transport Layer Control Events
98 * ==============================================
99 *
100 * FMA Class Payload
101 * --------- -------
102 * resource.fm.xprt.uuclose string (uuid of case)
103 * resource.fm.xprt.uuresolved string (uuid of case)
104 * resource.fm.xprt.updated string (uuid of case)
105 * resource.fm.xprt.subscribe string (class pattern)
106 * resource.fm.xprt.unsubscribe string (class pattern)
107 * resource.fm.xprt.unsuback string (class pattern)
108 * resource.fm.xprt.syn version information
109 * resource.fm.xprt.ack version information
110 * resource.fm.xprt.run version information
111 *
112 * Control events are used to add and delete proxy subscriptions on the remote
113 * transport peer module, and to set up connections. When a "syn" event is
114 * sent, FMD will include in the payload the highest version of the FMA event
115 * protocol that is supported by the sender. When a "syn" event is received,
116 * the receiving FMD will use the minimum of this version and its version of
117 * the protocol, and reply with this new minimum version in the "ack" event.
118 * The receiver will then use this new minimum for subsequent event semantics.
119 */
120
121 #include <sys/fm/protocol.h>
122 #include <strings.h>
123 #include <limits.h>
124
125 #include <fmd_alloc.h>
126 #include <fmd_error.h>
127 #include <fmd_conf.h>
128 #include <fmd_subr.h>
129 #include <fmd_string.h>
130 #include <fmd_protocol.h>
131 #include <fmd_thread.h>
132 #include <fmd_eventq.h>
133 #include <fmd_dispq.h>
134 #include <fmd_ctl.h>
135 #include <fmd_log.h>
136 #include <fmd_ustat.h>
137 #include <fmd_case.h>
138 #include <fmd_api.h>
139 #include <fmd_fmri.h>
140 #include <fmd_asru.h>
141 #include <fmd_xprt.h>
142
143 #include <fmd.h>
144
145 /*
146 * The states shown above in the transport state machine diagram are encoded
147 * using arrays of class patterns and a corresponding action function. These
148 * arrays are then passed to fmd_xprt_transition() to change transport states.
149 */
150
151 const fmd_xprt_rule_t _fmd_xprt_state_syn[] = {
152 { "resource.fm.xprt.syn", fmd_xprt_event_syn },
153 { "*", fmd_xprt_event_error },
154 { NULL, NULL }
155 };
156
157 const fmd_xprt_rule_t _fmd_xprt_state_ack[] = {
158 { "resource.fm.xprt.ack", fmd_xprt_event_ack },
159 { "*", fmd_xprt_event_error },
160 };
161
162 const fmd_xprt_rule_t _fmd_xprt_state_err[] = {
163 { "*", fmd_xprt_event_drop },
164 { NULL, NULL }
165 };
166
167 const fmd_xprt_rule_t _fmd_xprt_state_sub[] = {
168 { "resource.fm.xprt.subscribe", fmd_xprt_event_sub },
169 { "resource.fm.xprt.run", fmd_xprt_event_run },
170 { "resource.fm.xprt.*", fmd_xprt_event_error },
171 { "*", fmd_xprt_event_drop },
172 { NULL, NULL }
173 };
174
175 const fmd_xprt_rule_t _fmd_xprt_state_run[] = {
176 { "resource.fm.xprt.subscribe", fmd_xprt_event_sub },
177 { "resource.fm.xprt.unsubscribe", fmd_xprt_event_unsub },
178 { "resource.fm.xprt.unsuback", fmd_xprt_event_unsuback },
179 { "resource.fm.xprt.uuclose", fmd_xprt_event_uuclose },
180 { "resource.fm.xprt.uuresolved", fmd_xprt_event_uuresolved },
181 { "resource.fm.xprt.updated", fmd_xprt_event_updated },
182 { "resource.fm.xprt.*", fmd_xprt_event_error },
183 { NULL, NULL }
184 };
185
186 /*
187 * Template for per-transport statistics installed by fmd on behalf of each
188 * transport. These are used to initialize the per-transport xi_stats. For
189 * each statistic, the name is prepended with "fmd.xprt.%u", where %u is the
190 * transport ID (xi_id) and then are inserted into the per-module stats hash.
191 * The values in this array must match fmd_xprt_stat_t from <fmd_xprt.h>.
192 */
193 static const fmd_xprt_stat_t _fmd_xprt_stat_tmpl = {
194 {
195 { "dispatched", FMD_TYPE_UINT64, "total events dispatched to transport" },
196 { "dequeued", FMD_TYPE_UINT64, "total events dequeued by transport" },
197 { "prdequeued", FMD_TYPE_UINT64, "protocol events dequeued by transport" },
198 { "dropped", FMD_TYPE_UINT64, "total events dropped on queue overflow" },
199 { "wcnt", FMD_TYPE_UINT32, "count of events waiting on queue" },
200 { "wtime", FMD_TYPE_TIME, "total wait time on queue" },
201 { "wlentime", FMD_TYPE_TIME, "total wait length * time product" },
202 { "wlastupdate", FMD_TYPE_TIME, "hrtime of last wait queue update" },
203 { "dtime", FMD_TYPE_TIME, "total processing time after dequeue" },
204 { "dlastupdate", FMD_TYPE_TIME, "hrtime of last event dequeue completion" },
205 },
206 { "module", FMD_TYPE_STRING, "module that owns this transport" },
207 { "authority", FMD_TYPE_STRING, "authority associated with this transport" },
208 { "state", FMD_TYPE_STRING, "current transport state" },
209 { "received", FMD_TYPE_UINT64, "events received by transport" },
210 { "discarded", FMD_TYPE_UINT64, "bad events discarded by transport" },
211 { "retried", FMD_TYPE_UINT64, "retries requested of transport" },
212 { "replayed", FMD_TYPE_UINT64, "events replayed by transport" },
213 { "lost", FMD_TYPE_UINT64, "events lost by transport" },
214 { "timeouts", FMD_TYPE_UINT64, "events received by transport with ttl=0" },
215 { "subscriptions", FMD_TYPE_UINT64, "subscriptions registered to transport" },
216 };
217
218 static void
219 fmd_xprt_class_hash_create(fmd_xprt_class_hash_t *xch, fmd_eventq_t *eq)
220 {
221 uint_t hashlen = fmd.d_str_buckets;
222
223 xch->xch_queue = eq;
224 xch->xch_hashlen = hashlen;
225 xch->xch_hash = fmd_zalloc(sizeof (void *) * hashlen, FMD_SLEEP);
226 }
227
228 static void
229 fmd_xprt_class_hash_destroy(fmd_xprt_class_hash_t *xch)
230 {
231 fmd_eventq_t *eq = xch->xch_queue;
232 fmd_xprt_class_t *xcp, *ncp;
233 uint_t i;
234
235 for (i = 0; i < xch->xch_hashlen; i++) {
236 for (xcp = xch->xch_hash[i]; xcp != NULL; xcp = ncp) {
237 ncp = xcp->xc_next;
238
239 if (eq != NULL)
240 fmd_dispq_delete(fmd.d_disp, eq, xcp->xc_class);
241
242 fmd_strfree(xcp->xc_class);
243 fmd_free(xcp, sizeof (fmd_xprt_class_t));
244 }
245 }
246
247 fmd_free(xch->xch_hash, sizeof (void *) * xch->xch_hashlen);
248 }
249
250 /*
251 * Insert the specified class into the specified class hash, and return the
252 * reference count. A return value of one indicates this is the first insert.
253 * If an eventq is associated with the hash, insert a dispq subscription for it.
254 */
255 static uint_t
256 fmd_xprt_class_hash_insert(fmd_xprt_impl_t *xip,
257 fmd_xprt_class_hash_t *xch, const char *class)
258 {
259 uint_t h = fmd_strhash(class) % xch->xch_hashlen;
260 fmd_xprt_class_t *xcp;
261
262 ASSERT(MUTEX_HELD(&xip->xi_lock));
263
264 for (xcp = xch->xch_hash[h]; xcp != NULL; xcp = xcp->xc_next) {
265 if (strcmp(class, xcp->xc_class) == 0)
266 return (++xcp->xc_refs);
267 }
268
269 xcp = fmd_alloc(sizeof (fmd_xprt_class_t), FMD_SLEEP);
270 xcp->xc_class = fmd_strdup(class, FMD_SLEEP);
271 xcp->xc_next = xch->xch_hash[h];
272 xcp->xc_refs = 1;
273 xch->xch_hash[h] = xcp;
274
275 if (xch->xch_queue != NULL)
276 fmd_dispq_insert(fmd.d_disp, xch->xch_queue, class);
277
278 return (xcp->xc_refs);
279 }
280
281 /*
282 * Delete the specified class from the specified class hash, and return the
283 * reference count. A return value of zero indicates the class was deleted.
284 * If an eventq is associated with the hash, delete the dispq subscription.
285 */
286 static uint_t
287 fmd_xprt_class_hash_delete(fmd_xprt_impl_t *xip,
288 fmd_xprt_class_hash_t *xch, const char *class)
289 {
290 uint_t h = fmd_strhash(class) % xch->xch_hashlen;
291 fmd_xprt_class_t *xcp, **pp;
292
293 ASSERT(MUTEX_HELD(&xip->xi_lock));
294 pp = &xch->xch_hash[h];
295
296 for (xcp = *pp; xcp != NULL; xcp = xcp->xc_next) {
297 if (strcmp(class, xcp->xc_class) == 0)
298 break;
299 else
300 pp = &xcp->xc_next;
301 }
302
303 if (xcp == NULL)
304 return (-1U); /* explicitly permit an invalid delete */
305
306 if (--xcp->xc_refs != 0)
307 return (xcp->xc_refs);
308
309 ASSERT(xcp->xc_refs == 0);
310 *pp = xcp->xc_next;
311
312 fmd_strfree(xcp->xc_class);
313 fmd_free(xcp, sizeof (fmd_xprt_class_t));
314
315 if (xch->xch_queue != NULL)
316 fmd_dispq_delete(fmd.d_disp, xch->xch_queue, class);
317
318 return (0);
319 }
320
321 /*
322 * Queue subscribe events for the specified transport corresponding to all of
323 * the active module subscriptions. This is an extremely heavyweight operation
324 * that we expect to take place rarely (i.e. when loading a transport module
325 * or when it establishes a connection). We lock all of the known modules to
326 * prevent them from adding or deleting subscriptions, then snapshot their
327 * subscriptions, and then unlock all of the modules. We hold the modhash
328 * lock for the duration of this operation to prevent new modules from loading.
329 */
330 static void
331 fmd_xprt_subscribe_modhash(fmd_xprt_impl_t *xip, fmd_modhash_t *mhp)
332 {
333 fmd_xprt_t *xp = (fmd_xprt_t *)xip;
334 const fmd_conf_path_t *pap;
335 fmd_module_t *mp;
336 uint_t i, j;
337
338 (void) pthread_rwlock_rdlock(&mhp->mh_lock);
339
340 for (i = 0; i < mhp->mh_hashlen; i++) {
341 for (mp = mhp->mh_hash[i]; mp != NULL; mp = mp->mod_next)
342 fmd_module_lock(mp);
343 }
344
345 (void) pthread_mutex_lock(&xip->xi_lock);
346 ASSERT(!(xip->xi_flags & FMD_XPRT_SUBSCRIBER));
347 xip->xi_flags |= FMD_XPRT_SUBSCRIBER;
348 (void) pthread_mutex_unlock(&xip->xi_lock);
349
350 for (i = 0; i < mhp->mh_hashlen; i++) {
351 for (mp = mhp->mh_hash[i]; mp != NULL; mp = mp->mod_next) {
352 (void) fmd_conf_getprop(mp->mod_conf,
353 FMD_PROP_SUBSCRIPTIONS, &pap);
354 for (j = 0; j < pap->cpa_argc; j++)
355 fmd_xprt_subscribe(xp, pap->cpa_argv[j]);
356 }
357 }
358
359 for (i = 0; i < mhp->mh_hashlen; i++) {
360 for (mp = mhp->mh_hash[i]; mp != NULL; mp = mp->mod_next)
361 fmd_module_unlock(mp);
362 }
363
364 (void) pthread_rwlock_unlock(&mhp->mh_lock);
365 }
366
367 static void
368 fmd_xprt_transition(fmd_xprt_impl_t *xip,
369 const fmd_xprt_rule_t *state, const char *tag)
370 {
371 fmd_xprt_t *xp = (fmd_xprt_t *)xip;
372 fmd_event_t *e;
373 nvlist_t *nvl;
374 char *s;
375
376 TRACE((FMD_DBG_XPRT, "xprt %u -> %s\n", xip->xi_id, tag));
377
378 xip->xi_state = state;
379 s = fmd_strdup(tag, FMD_SLEEP);
380
381 (void) pthread_mutex_lock(&xip->xi_stats_lock);
382 fmd_strfree(xip->xi_stats->xs_state.fmds_value.str);
383 xip->xi_stats->xs_state.fmds_value.str = s;
384 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
385
386 /*
387 * If we've reached the SUB state, take out the big hammer and snapshot
388 * all of the subscriptions of all of the loaded modules. Then queue a
389 * run event for our remote peer indicating that it can enter RUN.
390 */
391 if (state == _fmd_xprt_state_sub) {
392 fmd_xprt_subscribe_modhash(xip, fmd.d_mod_hash);
393
394 /*
395 * For read-write transports, we always want to set up remote
396 * subscriptions to the bultin list.* events, regardless of
397 * whether any agents have subscribed to them.
398 */
399 if (xip->xi_flags & FMD_XPRT_RDWR) {
400 fmd_xprt_subscribe(xp, FM_LIST_SUSPECT_CLASS);
401 fmd_xprt_subscribe(xp, FM_LIST_ISOLATED_CLASS);
402 fmd_xprt_subscribe(xp, FM_LIST_UPDATED_CLASS);
403 fmd_xprt_subscribe(xp, FM_LIST_RESOLVED_CLASS);
404 fmd_xprt_subscribe(xp, FM_LIST_REPAIRED_CLASS);
405 }
406
407 nvl = fmd_protocol_xprt_ctl(xip->xi_queue->eq_mod,
408 "resource.fm.xprt.run", xip->xi_version);
409
410 (void) nvlist_lookup_string(nvl, FM_CLASS, &s);
411 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, s);
412 fmd_eventq_insert_at_time(xip->xi_queue, e);
413 }
414 }
415
416 static void
417 fmd_xprt_authupdate(fmd_xprt_impl_t *xip)
418 {
419 char *s = fmd_fmri_auth2str(xip->xi_auth);
420
421 (void) pthread_mutex_lock(&xip->xi_stats_lock);
422 fmd_strfree(xip->xi_stats->xs_authority.fmds_value.str);
423 xip->xi_stats->xs_authority.fmds_value.str = s;
424 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
425 }
426
427 static int
428 fmd_xprt_vmismatch(fmd_xprt_impl_t *xip, nvlist_t *nvl, uint_t *rversionp)
429 {
430 uint8_t rversion;
431
432 if (nvlist_lookup_uint8(nvl, FM_VERSION, &rversion) != 0) {
433 (void) pthread_mutex_lock(&xip->xi_stats_lock);
434 xip->xi_stats->xs_discarded.fmds_value.ui64++;
435 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
436
437 fmd_xprt_transition(xip, _fmd_xprt_state_err, "ERR");
438 return (1);
439 }
440
441 if (rversion > xip->xi_version) {
442 fmd_dprintf(FMD_DBG_XPRT, "xprt %u protocol mismatch: %u>%u\n",
443 xip->xi_id, rversion, xip->xi_version);
444
445 (void) pthread_mutex_lock(&xip->xi_stats_lock);
446 xip->xi_stats->xs_discarded.fmds_value.ui64++;
447 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
448
449 fmd_xprt_transition(xip, _fmd_xprt_state_err, "ERR");
450 return (1);
451 }
452
453 if (rversionp != NULL)
454 *rversionp = rversion;
455
456 return (0);
457 }
458
459 void
460 fmd_xprt_event_syn(fmd_xprt_impl_t *xip, nvlist_t *nvl)
461 {
462 fmd_event_t *e;
463 uint_t vers;
464 char *class;
465
466 if (fmd_xprt_vmismatch(xip, nvl, &vers))
467 return; /* transitioned to error state */
468
469 /*
470 * If the transport module didn't specify an authority, extract the
471 * one that is passed along with the xprt.syn event and use that.
472 */
473 if (xip->xi_auth == NULL &&
474 nvlist_lookup_nvlist(nvl, FM_RSRC_RESOURCE, &nvl) == 0 &&
475 nvlist_lookup_nvlist(nvl, FM_FMRI_AUTHORITY, &nvl) == 0) {
476 (void) nvlist_xdup(nvl, &xip->xi_auth, &fmd.d_nva);
477 fmd_xprt_authupdate(xip);
478 }
479
480 nvl = fmd_protocol_xprt_ctl(xip->xi_queue->eq_mod,
481 "resource.fm.xprt.ack", xip->xi_version);
482
483 (void) nvlist_lookup_string(nvl, FM_CLASS, &class);
484 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, class);
485 fmd_eventq_insert_at_time(xip->xi_queue, e);
486
487 xip->xi_version = MIN(FM_RSRC_XPRT_VERSION, vers);
488 fmd_xprt_transition(xip, _fmd_xprt_state_sub, "SUB");
489 }
490
491 void
492 fmd_xprt_event_ack(fmd_xprt_impl_t *xip, nvlist_t *nvl)
493 {
494 uint_t vers;
495
496 if (fmd_xprt_vmismatch(xip, nvl, &vers))
497 return; /* transitioned to error state */
498
499 /*
500 * If the transport module didn't specify an authority, extract the
501 * one that is passed along with the xprt.syn event and use that.
502 */
503 if (xip->xi_auth == NULL &&
504 nvlist_lookup_nvlist(nvl, FM_RSRC_RESOURCE, &nvl) == 0 &&
505 nvlist_lookup_nvlist(nvl, FM_FMRI_AUTHORITY, &nvl) == 0) {
506 (void) nvlist_xdup(nvl, &xip->xi_auth, &fmd.d_nva);
507 fmd_xprt_authupdate(xip);
508 }
509
510 xip->xi_version = MIN(FM_RSRC_XPRT_VERSION, vers);
511 fmd_xprt_transition(xip, _fmd_xprt_state_sub, "SUB");
512 }
513
514 /*
515 * Upon transition to RUN, we take every solved case and resend a list.suspect
516 * event for it to our remote peer. If a case transitions from solved to a
517 * future state (CLOSE_WAIT, CLOSED, or REPAIRED) while we are iterating over
518 * the case hash, we will get it as part of examining the resource cache, next.
519 */
520 static void
521 fmd_xprt_send_case(fmd_case_t *cp, void *arg)
522 {
523 fmd_case_impl_t *cip = (fmd_case_impl_t *)cp;
524 fmd_xprt_impl_t *xip = arg;
525
526 fmd_event_t *e;
527 nvlist_t *nvl;
528 char *class;
529
530 if (cip->ci_state != FMD_CASE_SOLVED)
531 return;
532
533 nvl = fmd_case_mkevent(cp, FM_LIST_SUSPECT_CLASS);
534 (void) nvlist_lookup_string(nvl, FM_CLASS, &class);
535 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, class);
536
537 fmd_dprintf(FMD_DBG_XPRT, "re-send %s for %s to transport %u\n",
538 FM_LIST_SUSPECT_CLASS, cip->ci_uuid, xip->xi_id);
539
540 fmd_dispq_dispatch_gid(fmd.d_disp, e, class, xip->xi_queue->eq_sgid);
541 }
542
543 /*
544 * Similar to the above function, but for use with readonly transport. Puts
545 * the event on the module's queue such that it's fmdo_recv function can pick
546 * it up and send it if appropriate.
547 */
548 static void
549 fmd_xprt_send_case_ro(fmd_case_t *cp, void *arg)
550 {
551 fmd_case_impl_t *cip = (fmd_case_impl_t *)cp;
552 fmd_module_t *mp = arg;
553
554 fmd_event_t *e;
555 nvlist_t *nvl;
556 char *class;
557
558 if (cip->ci_state != FMD_CASE_SOLVED)
559 return;
560
561 nvl = fmd_case_mkevent(cp, FM_LIST_SUSPECT_CLASS);
562 (void) nvlist_lookup_string(nvl, FM_CLASS, &class);
563 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, class);
564
565 fmd_dprintf(FMD_DBG_XPRT, "re-send %s for %s to rdonly transport %s\n",
566 FM_LIST_SUSPECT_CLASS, cip->ci_uuid, mp->mod_name);
567
568 fmd_dispq_dispatch_gid(fmd.d_disp, e, class, mp->mod_queue->eq_sgid);
569 }
570
571 void
572 fmd_xprt_event_run(fmd_xprt_impl_t *xip, nvlist_t *nvl)
573 {
574 if (!fmd_xprt_vmismatch(xip, nvl, NULL)) {
575 fmd_xprt_transition(xip, _fmd_xprt_state_run, "RUN");
576 fmd_case_hash_apply(fmd.d_cases, fmd_xprt_send_case, xip);
577 }
578 }
579
580 void
581 fmd_xprt_event_sub(fmd_xprt_impl_t *xip, nvlist_t *nvl)
582 {
583 char *class;
584
585 if (fmd_xprt_vmismatch(xip, nvl, NULL))
586 return; /* transitioned to error state */
587
588 if (nvlist_lookup_string(nvl, FM_RSRC_XPRT_SUBCLASS, &class) != 0)
589 return; /* malformed protocol event */
590
591 (void) pthread_mutex_lock(&xip->xi_lock);
592 (void) fmd_xprt_class_hash_insert(xip, &xip->xi_lsub, class);
593 (void) pthread_mutex_unlock(&xip->xi_lock);
594
595 (void) pthread_mutex_lock(&xip->xi_stats_lock);
596 xip->xi_stats->xs_subscriptions.fmds_value.ui64++;
597 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
598 }
599
600 void
601 fmd_xprt_event_unsub(fmd_xprt_impl_t *xip, nvlist_t *nvl)
602 {
603 fmd_event_t *e;
604 char *class;
605
606 if (fmd_xprt_vmismatch(xip, nvl, NULL))
607 return; /* transitioned to error state */
608
609 if (nvlist_lookup_string(nvl, FM_RSRC_XPRT_SUBCLASS, &class) != 0)
610 return; /* malformed protocol event */
611
612 (void) pthread_mutex_lock(&xip->xi_lock);
613 (void) fmd_xprt_class_hash_delete(xip, &xip->xi_lsub, class);
614 (void) pthread_mutex_unlock(&xip->xi_lock);
615
616 (void) pthread_mutex_lock(&xip->xi_stats_lock);
617 xip->xi_stats->xs_subscriptions.fmds_value.ui64--;
618 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
619
620 nvl = fmd_protocol_xprt_sub(xip->xi_queue->eq_mod,
621 "resource.fm.xprt.unsuback", xip->xi_version, class);
622
623 (void) nvlist_lookup_string(nvl, FM_CLASS, &class);
624 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, class);
625 fmd_eventq_insert_at_time(xip->xi_queue, e);
626 }
627
628 void
629 fmd_xprt_event_unsuback(fmd_xprt_impl_t *xip, nvlist_t *nvl)
630 {
631 char *class;
632
633 if (fmd_xprt_vmismatch(xip, nvl, NULL))
634 return; /* transitioned to error state */
635
636 if (nvlist_lookup_string(nvl, FM_RSRC_XPRT_SUBCLASS, &class) != 0)
637 return; /* malformed protocol event */
638
639 (void) pthread_mutex_lock(&xip->xi_lock);
640 (void) fmd_xprt_class_hash_delete(xip, &xip->xi_usub, class);
641 (void) pthread_mutex_unlock(&xip->xi_lock);
642 }
643
644 /*
645 * on diagnosing side, receive a uuclose from the proxy.
646 */
647 void
648 fmd_xprt_event_uuclose(fmd_xprt_impl_t *xip, nvlist_t *nvl)
649 {
650 fmd_case_t *cp;
651 char *uuid;
652
653 if (fmd_xprt_vmismatch(xip, nvl, NULL))
654 return; /* transitioned to error state */
655
656 if (nvlist_lookup_string(nvl, FM_RSRC_XPRT_UUID, &uuid) == 0 &&
657 (cp = fmd_case_hash_lookup(fmd.d_cases, uuid)) != NULL) {
658 /*
659 * update resource cache status and transition case
660 */
661 fmd_case_close_status(cp);
662 fmd_case_transition(cp, FMD_CASE_CLOSE_WAIT, FMD_CF_ISOLATED);
663 fmd_case_rele(cp);
664 }
665 }
666
667 /*
668 * on diagnosing side, receive a uuresolved from the proxy.
669 */
670 void
671 fmd_xprt_event_uuresolved(fmd_xprt_impl_t *xip, nvlist_t *nvl)
672 {
673 fmd_case_t *cp;
674 char *uuid;
675
676 if (fmd_xprt_vmismatch(xip, nvl, NULL))
677 return; /* transitioned to error state */
678
679 if (nvlist_lookup_string(nvl, FM_RSRC_XPRT_UUID, &uuid) == 0 &&
680 (cp = fmd_case_hash_lookup(fmd.d_cases, uuid)) != NULL) {
681 fmd_case_impl_t *cip = (fmd_case_impl_t *)cp;
682
683 fmd_case_transition(cp, (cip->ci_state == FMD_CASE_REPAIRED) ?
684 FMD_CASE_RESOLVED : (cip->ci_state == FMD_CASE_CLOSED) ?
685 FMD_CASE_REPAIRED : FMD_CASE_CLOSE_WAIT, FMD_CF_RESOLVED);
686 fmd_case_rele(cp);
687 }
688 }
689
690 /*
691 * on diagnosing side, receive a repair/acquit from the proxy.
692 */
693 void
694 fmd_xprt_event_updated(fmd_xprt_impl_t *xip, nvlist_t *nvl)
695 {
696 fmd_case_t *cp;
697 char *uuid;
698
699 if (fmd_xprt_vmismatch(xip, nvl, NULL))
700 return; /* transitioned to error state */
701
702 if (nvlist_lookup_string(nvl, FM_RSRC_XPRT_UUID, &uuid) == 0 &&
703 (cp = fmd_case_hash_lookup(fmd.d_cases, uuid)) != NULL) {
704 uint8_t *statusp, *proxy_asrup = NULL;
705 uint_t nelem = 0;
706
707 /*
708 * Only update status with new repairs if "no remote repair"
709 * is not set. Do the case_update anyway though (as this will
710 * refresh the status on the proxy side).
711 */
712 if (!(xip->xi_flags & FMD_XPRT_NO_REMOTE_REPAIR)) {
713 if (nvlist_lookup_uint8_array(nvl,
714 FM_RSRC_XPRT_FAULT_STATUS, &statusp, &nelem) == 0 &&
715 nelem != 0) {
716 (void) nvlist_lookup_uint8_array(nvl,
717 FM_RSRC_XPRT_FAULT_HAS_ASRU, &proxy_asrup,
718 &nelem);
719 fmd_case_update_status(cp, statusp,
720 proxy_asrup, NULL);
721 }
722 fmd_case_update_containees(cp);
723 }
724 fmd_case_update(cp);
725 fmd_case_rele(cp);
726 }
727 }
728
729 void
730 fmd_xprt_event_error(fmd_xprt_impl_t *xip, nvlist_t *nvl)
731 {
732 char *class = "<unknown>";
733
734 (void) pthread_mutex_lock(&xip->xi_stats_lock);
735 xip->xi_stats->xs_discarded.fmds_value.ui64++;
736 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
737
738 (void) nvlist_lookup_string(nvl, FM_CLASS, &class);
739 TRACE((FMD_DBG_XPRT, "xprt %u bad event %s\n", xip->xi_id, class));
740
741 fmd_xprt_transition(xip, _fmd_xprt_state_err, "ERR");
742 }
743
744 void
745 fmd_xprt_event_drop(fmd_xprt_impl_t *xip, nvlist_t *nvl)
746 {
747 char *class = "<unknown>";
748
749 (void) pthread_mutex_lock(&xip->xi_stats_lock);
750 xip->xi_stats->xs_discarded.fmds_value.ui64++;
751 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
752
753 (void) nvlist_lookup_string(nvl, FM_CLASS, &class);
754 TRACE((FMD_DBG_XPRT, "xprt %u drop event %s\n", xip->xi_id, class));
755
756 }
757
758 fmd_xprt_t *
759 fmd_xprt_create(fmd_module_t *mp, uint_t flags, nvlist_t *auth, void *data)
760 {
761 fmd_xprt_impl_t *xip = fmd_zalloc(sizeof (fmd_xprt_impl_t), FMD_SLEEP);
762 fmd_stat_t *statv;
763 uint_t i, statc;
764
765 char buf[PATH_MAX];
766 fmd_event_t *e;
767 nvlist_t *nvl;
768 char *s;
769
770 (void) pthread_mutex_init(&xip->xi_lock, NULL);
771 (void) pthread_cond_init(&xip->xi_cv, NULL);
772 (void) pthread_mutex_init(&xip->xi_stats_lock, NULL);
773
774 xip->xi_auth = auth;
775 xip->xi_data = data;
776 xip->xi_version = FM_RSRC_XPRT_VERSION;
777 xip->xi_flags = flags;
778
779 /*
780 * Grab fmd.d_xprt_lock to block fmd_xprt_suspend_all() and then create
781 * a transport ID and make it visible in fmd.d_xprt_ids. If transports
782 * were previously suspended, set the FMD_XPRT_DSUSPENDED flag on us to
783 * ensure that this transport will not run until fmd_xprt_resume_all().
784 */
785 (void) pthread_mutex_lock(&fmd.d_xprt_lock);
786 xip->xi_id = fmd_idspace_alloc(fmd.d_xprt_ids, xip);
787
788 if (fmd.d_xprt_suspend != 0)
789 xip->xi_flags |= FMD_XPRT_DSUSPENDED;
790
791 (void) pthread_mutex_unlock(&fmd.d_xprt_lock);
792
793 /*
794 * If the module has not yet finished _fmd_init(), set the ISUSPENDED
795 * bit so that fmdo_send() is not called until _fmd_init() completes.
796 */
797 if (!(mp->mod_flags & FMD_MOD_INIT))
798 xip->xi_flags |= FMD_XPRT_ISUSPENDED;
799
800 /*
801 * Initialize the transport statistics that we keep on behalf of fmd.
802 * These are set up using a template defined at the top of this file.
803 * We rename each statistic with a prefix ensuring its uniqueness.
804 */
805 statc = sizeof (_fmd_xprt_stat_tmpl) / sizeof (fmd_stat_t);
806 statv = fmd_alloc(sizeof (_fmd_xprt_stat_tmpl), FMD_SLEEP);
807 bcopy(&_fmd_xprt_stat_tmpl, statv, sizeof (_fmd_xprt_stat_tmpl));
808
809 for (i = 0; i < statc; i++) {
810 (void) snprintf(statv[i].fmds_name,
811 sizeof (statv[i].fmds_name), "fmd.xprt.%u.%s", xip->xi_id,
812 ((fmd_stat_t *)&_fmd_xprt_stat_tmpl + i)->fmds_name);
813 }
814
815 xip->xi_stats = (fmd_xprt_stat_t *)fmd_ustat_insert(
816 mp->mod_ustat, FMD_USTAT_NOALLOC, statc, statv, NULL);
817
818 if (xip->xi_stats == NULL)
819 fmd_panic("failed to create xi_stats (%p)\n", (void *)statv);
820
821 xip->xi_stats->xs_module.fmds_value.str =
822 fmd_strdup(mp->mod_name, FMD_SLEEP);
823
824 if (xip->xi_auth != NULL)
825 fmd_xprt_authupdate(xip);
826
827 /*
828 * Create the outbound eventq for this transport and link to its stats.
829 * If any suspend bits were set above, suspend the eventq immediately.
830 */
831 xip->xi_queue = fmd_eventq_create(mp, &xip->xi_stats->xs_evqstat,
832 &xip->xi_stats_lock, mp->mod_stats->ms_xprtqlimit.fmds_value.ui32);
833
834 if (xip->xi_flags & FMD_XPRT_SMASK)
835 fmd_eventq_suspend(xip->xi_queue);
836
837 /*
838 * Create our subscription hashes: local subscriptions go to xi_queue,
839 * remote subscriptions are tracked only for protocol requests, and
840 * pending unsubscriptions are associated with the /dev/null eventq.
841 */
842 fmd_xprt_class_hash_create(&xip->xi_lsub, xip->xi_queue);
843 fmd_xprt_class_hash_create(&xip->xi_rsub, NULL);
844 fmd_xprt_class_hash_create(&xip->xi_usub, fmd.d_rmod->mod_queue);
845
846 /*
847 * Determine our initial state based upon the creation flags. If we're
848 * read-only, go directly to RUN. If we're accepting a new connection,
849 * wait for a SYN. Otherwise send a SYN and wait for an ACK.
850 */
851 if ((flags & FMD_XPRT_RDWR) == FMD_XPRT_RDONLY) {
852 /*
853 * Send the list.suspects across here for readonly transports.
854 * For read-write transport they will be sent on transition to
855 * RUN state in fmd_xprt_event_run().
856 */
857 fmd_case_hash_apply(fmd.d_cases, fmd_xprt_send_case_ro, mp);
858 fmd_xprt_transition(xip, _fmd_xprt_state_run, "RUN");
859 } else if (flags & FMD_XPRT_ACCEPT)
860 fmd_xprt_transition(xip, _fmd_xprt_state_syn, "SYN");
861 else
862 fmd_xprt_transition(xip, _fmd_xprt_state_ack, "ACK");
863
864 /*
865 * If client.xprtlog is set to TRUE, create a debugging log for the
866 * events received by the transport in var/fm/fmd/xprt/.
867 */
868 (void) fmd_conf_getprop(fmd.d_conf, "client.xprtlog", &i);
869 (void) fmd_conf_getprop(fmd.d_conf, "log.xprt", &s);
870
871 if (i) {
872 (void) snprintf(buf, sizeof (buf), "%s/%u.log", s, xip->xi_id);
873 xip->xi_log = fmd_log_open(fmd.d_rootdir, buf, FMD_LOG_XPRT);
874 }
875
876 ASSERT(fmd_module_locked(mp));
877 fmd_list_append(&mp->mod_transports, xip);
878
879 (void) pthread_mutex_lock(&mp->mod_stats_lock);
880 mp->mod_stats->ms_xprtopen.fmds_value.ui32++;
881 (void) pthread_mutex_unlock(&mp->mod_stats_lock);
882
883 /*
884 * If this is a read-only transport, return without creating a send
885 * queue thread and setting up any connection events in our queue.
886 */
887 if ((flags & FMD_XPRT_RDWR) == FMD_XPRT_RDONLY)
888 goto out;
889
890 /*
891 * Once the transport is fully initialized, create a send queue thread
892 * and start any connect events flowing to complete our initialization.
893 */
894 if ((xip->xi_thread = fmd_thread_create(mp,
895 (fmd_thread_f *)fmd_xprt_send, xip)) == NULL) {
896
897 fmd_error(EFMD_XPRT_THR,
898 "failed to create thread for transport %u", xip->xi_id);
899
900 fmd_xprt_destroy((fmd_xprt_t *)xip);
901 (void) fmd_set_errno(EFMD_XPRT_THR);
902 return (NULL);
903 }
904
905 /*
906 * If the transport is not being opened to accept an inbound connect,
907 * start an outbound connection by enqueuing a SYN event for our peer.
908 */
909 if (!(flags & FMD_XPRT_ACCEPT)) {
910 nvl = fmd_protocol_xprt_ctl(mp,
911 "resource.fm.xprt.syn", FM_RSRC_XPRT_VERSION);
912
913 (void) nvlist_lookup_string(nvl, FM_CLASS, &s);
914 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, s);
915 fmd_eventq_insert_at_time(xip->xi_queue, e);
916 }
917 out:
918 fmd_dprintf(FMD_DBG_XPRT, "opened transport %u\n", xip->xi_id);
919 return ((fmd_xprt_t *)xip);
920 }
921
922 void
923 fmd_xprt_destroy(fmd_xprt_t *xp)
924 {
925 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
926 fmd_module_t *mp = xip->xi_queue->eq_mod;
927 uint_t id = xip->xi_id;
928
929 fmd_case_impl_t *cip, *nip;
930 fmd_stat_t *sp;
931 uint_t i, n;
932
933 ASSERT(fmd_module_locked(mp));
934 fmd_list_delete(&mp->mod_transports, xip);
935
936 (void) pthread_mutex_lock(&mp->mod_stats_lock);
937 mp->mod_stats->ms_xprtopen.fmds_value.ui32--;
938 (void) pthread_mutex_unlock(&mp->mod_stats_lock);
939
940 (void) pthread_mutex_lock(&xip->xi_lock);
941
942 while (xip->xi_busy != 0)
943 (void) pthread_cond_wait(&xip->xi_cv, &xip->xi_lock);
944
945 /*
946 * Remove the transport from global visibility, cancel its send-side
947 * thread, join with it, and then remove the transport from module
948 * visibility. Once all this is done, destroy and free the transport.
949 */
950 (void) fmd_idspace_free(fmd.d_xprt_ids, xip->xi_id);
951
952 if (xip->xi_thread != NULL) {
953 fmd_eventq_abort(xip->xi_queue);
954 fmd_module_unlock(mp);
955 fmd_thread_destroy(xip->xi_thread, FMD_THREAD_JOIN);
956 fmd_module_lock(mp);
957 }
958
959 if (xip->xi_log != NULL)
960 fmd_log_rele(xip->xi_log);
961
962 /*
963 * Release every case handle in the module that was cached by this
964 * transport. This will result in these cases disappearing from the
965 * local case hash so that fmd_case_uuclose() and fmd_case_repaired()
966 * etc can no longer be used.
967 */
968 for (cip = fmd_list_next(&mp->mod_cases); cip != NULL; cip = nip) {
969 nip = fmd_list_next(cip);
970 if (cip->ci_xprt == xp)
971 fmd_case_discard((fmd_case_t *)cip, B_TRUE);
972 }
973
974 /*
975 * Destroy every class in the various subscription hashes and remove
976 * any corresponding subscriptions from the event dispatch queue.
977 */
978 fmd_xprt_class_hash_destroy(&xip->xi_lsub);
979 fmd_xprt_class_hash_destroy(&xip->xi_rsub);
980 fmd_xprt_class_hash_destroy(&xip->xi_usub);
981
982 /*
983 * Uniquify the stat names exactly as was done in fmd_xprt_create()
984 * before calling fmd_ustat_insert(), otherwise fmd_ustat_delete()
985 * won't find the entries in the hash table.
986 */
987 n = sizeof (_fmd_xprt_stat_tmpl) / sizeof (fmd_stat_t);
988 sp = fmd_alloc(sizeof (_fmd_xprt_stat_tmpl), FMD_SLEEP);
989 bcopy(&_fmd_xprt_stat_tmpl, sp, sizeof (_fmd_xprt_stat_tmpl));
990 for (i = 0; i < n; i++) {
991 (void) snprintf(sp[i].fmds_name,
992 sizeof (sp[i].fmds_name), "fmd.xprt.%u.%s", xip->xi_id,
993 ((fmd_stat_t *)&_fmd_xprt_stat_tmpl + i)->fmds_name);
994 }
995 fmd_ustat_delete(mp->mod_ustat, n, sp);
996 fmd_free(sp, sizeof (_fmd_xprt_stat_tmpl));
997
998 fmd_free(xip->xi_stats, sizeof (fmd_xprt_stat_t));
999 fmd_eventq_destroy(xip->xi_queue);
1000 nvlist_free(xip->xi_auth);
1001 fmd_free(xip, sizeof (fmd_xprt_impl_t));
1002
1003 fmd_dprintf(FMD_DBG_XPRT, "closed transport %u\n", id);
1004 }
1005
1006 void
1007 fmd_xprt_xsuspend(fmd_xprt_t *xp, uint_t flags)
1008 {
1009 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1010 uint_t oflags;
1011
1012 ASSERT((flags & ~FMD_XPRT_SMASK) == 0);
1013 (void) pthread_mutex_lock(&xip->xi_lock);
1014
1015 oflags = xip->xi_flags;
1016 xip->xi_flags |= flags;
1017
1018 if (!(oflags & FMD_XPRT_SMASK) && (xip->xi_flags & FMD_XPRT_SMASK) != 0)
1019 fmd_eventq_suspend(xip->xi_queue);
1020
1021 (void) pthread_cond_broadcast(&xip->xi_cv);
1022
1023 while (xip->xi_busy != 0)
1024 (void) pthread_cond_wait(&xip->xi_cv, &xip->xi_lock);
1025
1026 (void) pthread_mutex_unlock(&xip->xi_lock);
1027 }
1028
1029 void
1030 fmd_xprt_xresume(fmd_xprt_t *xp, uint_t flags)
1031 {
1032 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1033 uint_t oflags;
1034
1035 ASSERT((flags & ~FMD_XPRT_SMASK) == 0);
1036 (void) pthread_mutex_lock(&xip->xi_lock);
1037
1038 oflags = xip->xi_flags;
1039 xip->xi_flags &= ~flags;
1040
1041 if ((oflags & FMD_XPRT_SMASK) != 0 && !(xip->xi_flags & FMD_XPRT_SMASK))
1042 fmd_eventq_resume(xip->xi_queue);
1043
1044 (void) pthread_cond_broadcast(&xip->xi_cv);
1045 (void) pthread_mutex_unlock(&xip->xi_lock);
1046 }
1047
1048 void
1049 fmd_xprt_send(fmd_xprt_t *xp)
1050 {
1051 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1052 fmd_module_t *mp = xip->xi_queue->eq_mod;
1053 fmd_event_t *ep;
1054 int err;
1055
1056 while ((ep = fmd_eventq_delete(xip->xi_queue)) != NULL) {
1057 if (FMD_EVENT_TTL(ep) == 0) {
1058 fmd_event_rele(ep);
1059 continue;
1060 }
1061
1062 fmd_dprintf(FMD_DBG_XPRT, "xprt %u sending %s\n",
1063 xip->xi_id, (char *)FMD_EVENT_DATA(ep));
1064
1065 err = mp->mod_ops->mop_transport(mp, xp, ep);
1066 fmd_eventq_done(xip->xi_queue);
1067
1068 if (err == FMD_SEND_RETRY) {
1069 fmd_eventq_insert_at_time(xip->xi_queue, ep);
1070 (void) pthread_mutex_lock(&xip->xi_stats_lock);
1071 xip->xi_stats->xs_retried.fmds_value.ui64++;
1072 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
1073 }
1074
1075 if (err != FMD_SEND_SUCCESS && err != FMD_SEND_RETRY) {
1076 (void) pthread_mutex_lock(&xip->xi_stats_lock);
1077 xip->xi_stats->xs_lost.fmds_value.ui64++;
1078 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
1079 }
1080
1081 fmd_event_rele(ep);
1082 }
1083 }
1084
1085 /*
1086 * This function creates a local suspect list. This is used when a suspect list
1087 * is created directly by an external source like fminject.
1088 */
1089 static void
1090 fmd_xprt_list_suspect_local(fmd_xprt_t *xp, nvlist_t *nvl)
1091 {
1092 nvlist_t **nvlp;
1093 nvlist_t *de_fmri, *de_fmri_dup = NULL;
1094 int64_t *diag_time;
1095 char *code = NULL;
1096 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1097 fmd_case_t *cp;
1098 uint_t nelem = 0, nelem2 = 0, i;
1099 boolean_t injected;
1100
1101 fmd_module_lock(xip->xi_queue->eq_mod);
1102 cp = fmd_case_create(xip->xi_queue->eq_mod, NULL, NULL);
1103 if (cp == NULL) {
1104 fmd_module_unlock(xip->xi_queue->eq_mod);
1105 return;
1106 }
1107
1108 /*
1109 * copy diag_code if present
1110 */
1111 (void) nvlist_lookup_string(nvl, FM_SUSPECT_DIAG_CODE, &code);
1112 if (code != NULL) {
1113 fmd_case_impl_t *cip = (fmd_case_impl_t *)cp;
1114
1115 cip->ci_precanned = 1;
1116 fmd_case_setcode(cp, code);
1117 }
1118
1119 /*
1120 * copy suspects
1121 */
1122 (void) nvlist_lookup_nvlist_array(nvl, FM_SUSPECT_FAULT_LIST, &nvlp,
1123 &nelem);
1124 for (i = 0; i < nelem; i++) {
1125 nvlist_t *flt_copy, *asru = NULL, *fru = NULL, *rsrc = NULL;
1126 topo_hdl_t *thp;
1127 char *loc = NULL;
1128 int err;
1129
1130 thp = fmd_fmri_topo_hold(TOPO_VERSION);
1131 (void) nvlist_xdup(nvlp[i], &flt_copy, &fmd.d_nva);
1132 (void) nvlist_lookup_nvlist(nvlp[i], FM_FAULT_RESOURCE, &rsrc);
1133
1134 /*
1135 * If no fru specified, get it from topo
1136 */
1137 if (nvlist_lookup_nvlist(nvlp[i], FM_FAULT_FRU, &fru) != 0 &&
1138 rsrc && topo_fmri_fru(thp, rsrc, &fru, &err) == 0)
1139 (void) nvlist_add_nvlist(flt_copy, FM_FAULT_FRU, fru);
1140 /*
1141 * If no asru specified, get it from topo
1142 */
1143 if (nvlist_lookup_nvlist(nvlp[i], FM_FAULT_ASRU, &asru) != 0 &&
1144 rsrc && topo_fmri_asru(thp, rsrc, &asru, &err) == 0)
1145 (void) nvlist_add_nvlist(flt_copy, FM_FAULT_ASRU, asru);
1146 /*
1147 * If no location specified, get it from topo
1148 */
1149 if (nvlist_lookup_string(nvlp[i], FM_FAULT_LOCATION,
1150 &loc) != 0) {
1151 if (fru && topo_fmri_label(thp, fru, &loc, &err) == 0)
1152 (void) nvlist_add_string(flt_copy,
1153 FM_FAULT_LOCATION, loc);
1154 else if (rsrc && topo_fmri_label(thp, rsrc, &loc,
1155 &err) == 0)
1156 (void) nvlist_add_string(flt_copy,
1157 FM_FAULT_LOCATION, loc);
1158 if (loc)
1159 topo_hdl_strfree(thp, loc);
1160 }
1161 nvlist_free(fru);
1162 nvlist_free(asru);
1163 nvlist_free(rsrc);
1164 fmd_fmri_topo_rele(thp);
1165 fmd_case_insert_suspect(cp, flt_copy);
1166 }
1167
1168 /*
1169 * copy diag_time if present
1170 */
1171 if (nvlist_lookup_int64_array(nvl, FM_SUSPECT_DIAG_TIME, &diag_time,
1172 &nelem2) == 0 && nelem2 >= 2)
1173 fmd_case_settime(cp, diag_time[0], diag_time[1]);
1174
1175 /*
1176 * copy DE fmri if present
1177 */
1178 if (nvlist_lookup_nvlist(nvl, FM_SUSPECT_DE, &de_fmri) == 0) {
1179 (void) nvlist_xdup(de_fmri, &de_fmri_dup, &fmd.d_nva);
1180 fmd_case_set_de_fmri(cp, de_fmri_dup);
1181 }
1182
1183 /*
1184 * copy injected if present
1185 */
1186 if (nvlist_lookup_boolean_value(nvl, FM_SUSPECT_INJECTED,
1187 &injected) == 0 && injected)
1188 fmd_case_set_injected(cp);
1189
1190 fmd_case_transition(cp, FMD_CASE_SOLVED, FMD_CF_SOLVED);
1191 fmd_module_unlock(xip->xi_queue->eq_mod);
1192 }
1193
1194 /*
1195 * This function is called to create a proxy case on receipt of a list.suspect
1196 * from the diagnosing side of the transport.
1197 */
1198 static void
1199 fmd_xprt_list_suspect(fmd_xprt_t *xp, nvlist_t *nvl)
1200 {
1201 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1202 nvlist_t **nvlp;
1203 uint_t nelem = 0, nelem2 = 0, i;
1204 int64_t *diag_time;
1205 topo_hdl_t *thp;
1206 char *class;
1207 nvlist_t *rsrc, *asru, *de_fmri, *de_fmri_dup = NULL;
1208 nvlist_t *flt_copy;
1209 int err;
1210 nvlist_t **asrua;
1211 uint8_t *proxy_asru = NULL;
1212 int got_proxy_asru = 0;
1213 int got_hc_rsrc = 0;
1214 int got_hc_asru = 0;
1215 int got_present_rsrc = 0;
1216 uint8_t *diag_asru = NULL;
1217 char *scheme;
1218 uint8_t *statusp;
1219 char *uuid, *code;
1220 fmd_case_t *cp;
1221 fmd_case_impl_t *cip;
1222 int need_update = 0;
1223 boolean_t injected;
1224
1225 if (nvlist_lookup_string(nvl, FM_SUSPECT_UUID, &uuid) != 0)
1226 return;
1227 if (nvlist_lookup_string(nvl, FM_SUSPECT_DIAG_CODE, &code) != 0)
1228 return;
1229 (void) nvlist_lookup_nvlist_array(nvl, FM_SUSPECT_FAULT_LIST, &nvlp,
1230 &nelem);
1231
1232 /*
1233 * In order to implement FMD_XPRT_HCONLY and FMD_XPRT_HC_PRESENT_ONLY
1234 * etc we first scan the suspects to see if
1235 * - there was an asru in the received fault
1236 * - there was an hc-scheme resource in the received fault
1237 * - any hc-scheme resource in the received fault is present in the
1238 * local topology
1239 * - any hc-scheme resource in the received fault has an asru in the
1240 * local topology
1241 */
1242 if (nelem > 0) {
1243 asrua = fmd_zalloc(sizeof (nvlist_t *) * nelem, FMD_SLEEP);
1244 proxy_asru = fmd_zalloc(sizeof (uint8_t) * nelem, FMD_SLEEP);
1245 diag_asru = fmd_zalloc(sizeof (uint8_t) * nelem, FMD_SLEEP);
1246 thp = fmd_fmri_topo_hold(TOPO_VERSION);
1247 for (i = 0; i < nelem; i++) {
1248 if (nvlist_lookup_nvlist(nvlp[i], FM_FAULT_ASRU,
1249 &asru) == 0 && asru != NULL)
1250 diag_asru[i] = 1;
1251 if (nvlist_lookup_string(nvlp[i], FM_CLASS,
1252 &class) != 0 || strncmp(class, "fault", 5) != 0)
1253 continue;
1254 /*
1255 * If there is an hc-scheme asru, use that to find the
1256 * real asru. Otherwise if there is an hc-scheme
1257 * resource, work out the old asru from that.
1258 * This order is to allow a two stage evaluation
1259 * of the asru where a fault in the diagnosing side
1260 * is in a component not visible to the proxy side,
1261 * but prevents a component that is visible from
1262 * working. So the diagnosing side sets the asru to
1263 * the latter component (in hc-scheme as the diagnosing
1264 * side doesn't know about the proxy side's virtual
1265 * schemes), and then the proxy side can convert that
1266 * to a suitable virtual scheme asru.
1267 */
1268 if (nvlist_lookup_nvlist(nvlp[i], FM_FAULT_ASRU,
1269 &asru) == 0 && asru != NULL &&
1270 nvlist_lookup_string(asru, FM_FMRI_SCHEME,
1271 &scheme) == 0 &&
1272 strcmp(scheme, FM_FMRI_SCHEME_HC) == 0) {
1273 got_hc_asru = 1;
1274 if (xip->xi_flags & FMD_XPRT_EXTERNAL)
1275 continue;
1276 if (topo_fmri_present(thp, asru, &err) != 0)
1277 got_present_rsrc = 1;
1278 if (topo_fmri_asru(thp, asru, &asrua[i],
1279 &err) == 0) {
1280 proxy_asru[i] =
1281 FMD_PROXY_ASRU_FROM_ASRU;
1282 got_proxy_asru = 1;
1283 }
1284 } else if (nvlist_lookup_nvlist(nvlp[i],
1285 FM_FAULT_RESOURCE, &rsrc) == 0 && rsrc != NULL &&
1286 nvlist_lookup_string(rsrc, FM_FMRI_SCHEME,
1287 &scheme) == 0 &&
1288 strcmp(scheme, FM_FMRI_SCHEME_HC) == 0) {
1289 got_hc_rsrc = 1;
1290 if (xip->xi_flags & FMD_XPRT_EXTERNAL)
1291 continue;
1292 if (topo_fmri_present(thp, rsrc, &err) != 0)
1293 got_present_rsrc = 1;
1294 if (topo_fmri_asru(thp, rsrc, &asrua[i],
1295 &err) == 0) {
1296 proxy_asru[i] =
1297 FMD_PROXY_ASRU_FROM_RSRC;
1298 got_proxy_asru = 1;
1299 }
1300 }
1301 }
1302 fmd_fmri_topo_rele(thp);
1303 }
1304
1305 /*
1306 * If we're set up only to report hc-scheme faults, and
1307 * there aren't any, then just drop the event.
1308 */
1309 if (got_hc_rsrc == 0 && got_hc_asru == 0 &&
1310 (xip->xi_flags & FMD_XPRT_HCONLY)) {
1311 if (nelem > 0) {
1312 fmd_free(proxy_asru, sizeof (uint8_t) * nelem);
1313 fmd_free(diag_asru, sizeof (uint8_t) * nelem);
1314 fmd_free(asrua, sizeof (nvlist_t *) * nelem);
1315 }
1316 return;
1317 }
1318
1319 /*
1320 * If we're set up only to report locally present hc-scheme
1321 * faults, and there aren't any, then just drop the event.
1322 */
1323 if (got_present_rsrc == 0 &&
1324 (xip->xi_flags & FMD_XPRT_HC_PRESENT_ONLY)) {
1325 if (nelem > 0) {
1326 for (i = 0; i < nelem; i++)
1327 nvlist_free(asrua[i]);
1328 fmd_free(proxy_asru, sizeof (uint8_t) * nelem);
1329 fmd_free(diag_asru, sizeof (uint8_t) * nelem);
1330 fmd_free(asrua, sizeof (nvlist_t *) * nelem);
1331 }
1332 return;
1333 }
1334
1335 /*
1336 * If fmd_case_recreate() returns NULL, UUID is already known.
1337 */
1338 fmd_module_lock(xip->xi_queue->eq_mod);
1339 if ((cp = fmd_case_recreate(xip->xi_queue->eq_mod, xp,
1340 FMD_CASE_UNSOLVED, uuid, code)) == NULL) {
1341 if (nelem > 0) {
1342 for (i = 0; i < nelem; i++)
1343 nvlist_free(asrua[i]);
1344 fmd_free(proxy_asru, sizeof (uint8_t) * nelem);
1345 fmd_free(diag_asru, sizeof (uint8_t) * nelem);
1346 fmd_free(asrua, sizeof (nvlist_t *) * nelem);
1347 }
1348 fmd_module_unlock(xip->xi_queue->eq_mod);
1349 return;
1350 }
1351
1352 cip = (fmd_case_impl_t *)cp;
1353 cip->ci_diag_asru = diag_asru;
1354 cip->ci_proxy_asru = proxy_asru;
1355 for (i = 0; i < nelem; i++) {
1356 (void) nvlist_xdup(nvlp[i], &flt_copy, &fmd.d_nva);
1357 if (proxy_asru[i] != FMD_PROXY_ASRU_NOT_NEEDED) {
1358 /*
1359 * Copy suspects, but remove/replace asru first. Also if
1360 * the original asru was hc-scheme use that as resource.
1361 */
1362 if (proxy_asru[i] == FMD_PROXY_ASRU_FROM_ASRU) {
1363 (void) nvlist_remove(flt_copy,
1364 FM_FAULT_RESOURCE, DATA_TYPE_NVLIST);
1365 (void) nvlist_lookup_nvlist(flt_copy,
1366 FM_FAULT_ASRU, &asru);
1367 (void) nvlist_add_nvlist(flt_copy,
1368 FM_FAULT_RESOURCE, asru);
1369 }
1370 (void) nvlist_remove(flt_copy, FM_FAULT_ASRU,
1371 DATA_TYPE_NVLIST);
1372 (void) nvlist_add_nvlist(flt_copy, FM_FAULT_ASRU,
1373 asrua[i]);
1374 nvlist_free(asrua[i]);
1375 } else if (got_hc_asru == 0 &&
1376 nvlist_lookup_nvlist(flt_copy, FM_FAULT_ASRU,
1377 &asru) == 0 && asru != NULL) {
1378 /*
1379 * If we have an asru from diag side, but it's not
1380 * in hc scheme, then we can't be sure what it
1381 * represents, so mark as no retire.
1382 */
1383 (void) nvlist_add_boolean_value(flt_copy,
1384 FM_SUSPECT_RETIRE, B_FALSE);
1385 }
1386 fmd_case_insert_suspect(cp, flt_copy);
1387 }
1388 /*
1389 * copy diag_time
1390 */
1391 if (nvlist_lookup_int64_array(nvl, FM_SUSPECT_DIAG_TIME, &diag_time,
1392 &nelem2) == 0 && nelem2 >= 2)
1393 fmd_case_settime(cp, diag_time[0], diag_time[1]);
1394 /*
1395 * copy DE fmri
1396 */
1397 if (nvlist_lookup_nvlist(nvl, FM_SUSPECT_DE, &de_fmri) == 0) {
1398 (void) nvlist_xdup(de_fmri, &de_fmri_dup, &fmd.d_nva);
1399 fmd_case_set_de_fmri(cp, de_fmri_dup);
1400 }
1401
1402 /*
1403 * copy injected if present
1404 */
1405 if (nvlist_lookup_boolean_value(nvl, FM_SUSPECT_INJECTED,
1406 &injected) == 0 && injected)
1407 fmd_case_set_injected(cp);
1408
1409 /*
1410 * Transition to solved. This will log the suspect list and create
1411 * the resource cache entries.
1412 */
1413 fmd_case_transition(cp, FMD_CASE_SOLVED, FMD_CF_SOLVED);
1414
1415 /*
1416 * Update status if it is not simply "all faulty" (can happen if
1417 * list.suspects are being re-sent when the transport has reconnected).
1418 */
1419 (void) nvlist_lookup_uint8_array(nvl, FM_SUSPECT_FAULT_STATUS, &statusp,
1420 &nelem);
1421 for (i = 0; i < nelem; i++) {
1422 if ((statusp[i] & (FM_SUSPECT_FAULTY | FM_SUSPECT_UNUSABLE |
1423 FM_SUSPECT_NOT_PRESENT | FM_SUSPECT_DEGRADED)) !=
1424 FM_SUSPECT_FAULTY)
1425 need_update = 1;
1426 }
1427 if (need_update) {
1428 fmd_case_update_status(cp, statusp, cip->ci_proxy_asru,
1429 cip->ci_diag_asru);
1430 fmd_case_update_containees(cp);
1431 fmd_case_update(cp);
1432 }
1433
1434 /*
1435 * if asru on proxy side, send an update back to the diagnosing side to
1436 * update UNUSABLE/DEGRADED.
1437 */
1438 if (got_proxy_asru)
1439 fmd_case_xprt_updated(cp);
1440
1441 if (nelem > 0)
1442 fmd_free(asrua, sizeof (nvlist_t *) * nelem);
1443 fmd_module_unlock(xip->xi_queue->eq_mod);
1444 }
1445
1446 void
1447 fmd_xprt_recv(fmd_xprt_t *xp, nvlist_t *nvl, hrtime_t hrt, boolean_t logonly)
1448 {
1449 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1450 const fmd_xprt_rule_t *xrp;
1451 fmd_t *dp = &fmd;
1452
1453 fmd_event_t *e;
1454 char *class, *uuid;
1455 boolean_t isproto, isereport, isireport, ishvireport, issysevent;
1456
1457 uint64_t *tod;
1458 uint8_t ttl;
1459 uint_t n;
1460 fmd_case_t *cp;
1461
1462 /*
1463 * Grab the transport lock and set the busy flag to indicate we are
1464 * busy receiving an event. If [DI]SUSPEND is pending, wait until fmd
1465 * resumes the transport before continuing on with the receive.
1466 */
1467 (void) pthread_mutex_lock(&xip->xi_lock);
1468
1469 while (xip->xi_flags & (FMD_XPRT_DSUSPENDED | FMD_XPRT_ISUSPENDED)) {
1470
1471 if (fmd.d_signal != 0) {
1472 (void) pthread_mutex_unlock(&xip->xi_lock);
1473 return; /* fmd_destroy() is in progress */
1474 }
1475
1476 (void) pthread_cond_wait(&xip->xi_cv, &xip->xi_lock);
1477 }
1478
1479 xip->xi_busy++;
1480 ASSERT(xip->xi_busy != 0);
1481
1482 (void) pthread_mutex_unlock(&xip->xi_lock);
1483
1484 (void) pthread_mutex_lock(&xip->xi_stats_lock);
1485 xip->xi_stats->xs_received.fmds_value.ui64++;
1486 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
1487
1488 if (nvlist_lookup_string(nvl, FM_CLASS, &class) != 0) {
1489 fmd_error(EFMD_XPRT_PAYLOAD, "discarding nvlist %p: missing "
1490 "required \"%s\" payload element", (void *)nvl, FM_CLASS);
1491
1492 (void) pthread_mutex_lock(&xip->xi_stats_lock);
1493 xip->xi_stats->xs_discarded.fmds_value.ui64++;
1494 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
1495
1496 nvlist_free(nvl);
1497 goto done;
1498 }
1499
1500 fmd_dprintf(FMD_DBG_XPRT, "xprt %u %s %s\n", xip->xi_id,
1501 ((logonly == FMD_B_TRUE) ? "logging" : "posting"), class);
1502
1503 isereport = (strncmp(class, FM_EREPORT_CLASS ".",
1504 sizeof (FM_EREPORT_CLASS)) == 0) ? FMD_B_TRUE : FMD_B_FALSE;
1505
1506 isireport = (strncmp(class, FM_IREPORT_CLASS ".",
1507 sizeof (FM_IREPORT_CLASS)) == 0) ? FMD_B_TRUE : FMD_B_FALSE;
1508
1509 issysevent = (strncmp(class, SYSEVENT_RSRC_CLASS,
1510 sizeof (SYSEVENT_RSRC_CLASS) - 1)) == 0 ? FMD_B_TRUE : FMD_B_FALSE;
1511
1512 if (isireport) {
1513 char *pri;
1514
1515 if (nvlist_lookup_string(nvl, FM_IREPORT_PRIORITY, &pri) == 0 &&
1516 strncmp(pri, "high", 5) == 0) {
1517 ishvireport = 1;
1518 } else {
1519 ishvireport = 0;
1520 }
1521 }
1522
1523 /*
1524 * The logonly flag should only be set for ereports.
1525 */
1526 if (logonly == FMD_B_TRUE && isereport == FMD_B_FALSE) {
1527 fmd_error(EFMD_XPRT_INVAL, "discarding nvlist %p: "
1528 "logonly flag is not valid for class %s",
1529 (void *)nvl, class);
1530
1531 (void) pthread_mutex_lock(&xip->xi_stats_lock);
1532 xip->xi_stats->xs_discarded.fmds_value.ui64++;
1533 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
1534
1535 nvlist_free(nvl);
1536 goto done;
1537 }
1538
1539 /*
1540 * If a time-to-live value is present in the event and is zero, drop
1541 * the event and bump xs_timeouts. Otherwise decrement the TTL value.
1542 */
1543 if (nvlist_lookup_uint8(nvl, FMD_EVN_TTL, &ttl) == 0) {
1544 if (ttl == 0) {
1545 fmd_dprintf(FMD_DBG_XPRT, "xprt %u nvlist %p (%s) "
1546 "timeout: event received with ttl=0\n",
1547 xip->xi_id, (void *)nvl, class);
1548
1549 (void) pthread_mutex_lock(&xip->xi_stats_lock);
1550 xip->xi_stats->xs_timeouts.fmds_value.ui64++;
1551 (void) pthread_mutex_unlock(&xip->xi_stats_lock);
1552
1553 nvlist_free(nvl);
1554 goto done;
1555 }
1556 (void) nvlist_remove(nvl, FMD_EVN_TTL, DATA_TYPE_UINT8);
1557 (void) nvlist_add_uint8(nvl, FMD_EVN_TTL, ttl - 1);
1558 }
1559
1560 /*
1561 * If we are using the native system clock, the underlying transport
1562 * code can provide a tighter event time bound by telling us when the
1563 * event was enqueued. If we're using simulated clocks, this time
1564 * has no meaning to us, so just reset the value to use HRT_NOW.
1565 */
1566 if (dp->d_clockops != &fmd_timeops_native)
1567 hrt = FMD_HRT_NOW;
1568
1569 /*
1570 * If an event's class is in the FMD_CTL_CLASS family, then create a
1571 * control event. If a FMD_EVN_TOD member is found, create a protocol
1572 * event using this time. Otherwise create a protocol event using hrt.
1573 */
1574 isproto = (strncmp(class, FMD_CTL_CLASS, FMD_CTL_CLASS_LEN) == 0) ?
1575 FMD_B_FALSE : FMD_B_TRUE;
1576 if (isproto == FMD_B_FALSE)
1577 e = fmd_event_create(FMD_EVT_CTL, hrt, nvl, fmd_ctl_init(nvl));
1578 else if (nvlist_lookup_uint64_array(nvl, FMD_EVN_TOD, &tod, &n) != 0)
1579 e = fmd_event_create(FMD_EVT_PROTOCOL, hrt, nvl, class);
1580 else {
1581 e = fmd_event_recreate(FMD_EVT_PROTOCOL,
1582 NULL, nvl, class, NULL, 0, 0);
1583 }
1584
1585 /*
1586 * If the debug log is enabled, create a temporary event, log it to the
1587 * debug log, and then reset the underlying state of the event.
1588 */
1589 if (xip->xi_log != NULL) {
1590 fmd_event_impl_t *ep = (fmd_event_impl_t *)e;
1591
1592 fmd_log_append(xip->xi_log, e, NULL);
1593
1594 ep->ev_flags |= FMD_EVF_VOLATILE;
1595 ep->ev_off = 0;
1596 ep->ev_len = 0;
1597
1598 if (ep->ev_log != NULL) {
1599 fmd_log_rele(ep->ev_log);
1600 ep->ev_log = NULL;
1601 }
1602 }
1603
1604 /*
1605 * Iterate over the rules for the current state trying to match the
1606 * event class to one of our special rules. If a rule is matched, the
1607 * event is consumed and not dispatched to other modules. If the rule
1608 * set ends without matching an event, we fall through to dispatching.
1609 */
1610 for (xrp = xip->xi_state; xrp->xr_class != NULL; xrp++) {
1611 if (fmd_event_match(e, FMD_EVT_PROTOCOL, xrp->xr_class)) {
1612 fmd_event_hold(e);
1613 xrp->xr_func(xip, nvl);
1614 fmd_event_rele(e);
1615 goto done;
1616 }
1617 }
1618
1619 /*
1620 * Record ereports and ireports in the log. This code will
1621 * be replaced later with a per-transport intent log instead.
1622 */
1623 if (isereport == FMD_B_TRUE || isireport == FMD_B_TRUE ||
1624 issysevent == B_TRUE) {
1625 pthread_rwlock_t *lockp;
1626 fmd_log_t *lp;
1627
1628 if (isereport == FMD_B_TRUE) {
1629 lp = fmd.d_errlog;
1630 lockp = &fmd.d_log_lock;
1631 } else {
1632 if (ishvireport || issysevent) {
1633 lp = fmd.d_hvilog;
1634 lockp = &fmd.d_hvilog_lock;
1635 } else {
1636 lp = fmd.d_ilog;
1637 lockp = &fmd.d_ilog_lock;
1638 }
1639 }
1640
1641 (void) pthread_rwlock_rdlock(lockp);
1642 fmd_log_append(lp, e, NULL);
1643 (void) pthread_rwlock_unlock(lockp);
1644 }
1645
1646 /*
1647 * If a list.suspect event is received, create a case for the specified
1648 * UUID in the case hash, with the transport module as its owner.
1649 */
1650 if (fmd_event_match(e, FMD_EVT_PROTOCOL, FM_LIST_SUSPECT_CLASS)) {
1651 if (xip->xi_flags & FMD_XPRT_CACHE_AS_LOCAL)
1652 fmd_xprt_list_suspect_local(xp, nvl);
1653 else
1654 fmd_xprt_list_suspect(xp, nvl);
1655 fmd_event_hold(e);
1656 fmd_event_rele(e);
1657 goto done;
1658 }
1659
1660 /*
1661 * If a list.updated or list.repaired event is received, update the
1662 * resource cache status and the local case.
1663 */
1664 if (fmd_event_match(e, FMD_EVT_PROTOCOL, FM_LIST_REPAIRED_CLASS) ||
1665 fmd_event_match(e, FMD_EVT_PROTOCOL, FM_LIST_UPDATED_CLASS)) {
1666 uint8_t *statusp;
1667 uint_t nelem = 0;
1668
1669 (void) nvlist_lookup_uint8_array(nvl, FM_SUSPECT_FAULT_STATUS,
1670 &statusp, &nelem);
1671 fmd_module_lock(xip->xi_queue->eq_mod);
1672 if (nvlist_lookup_string(nvl, FM_SUSPECT_UUID, &uuid) == 0 &&
1673 (cp = fmd_case_hash_lookup(fmd.d_cases, uuid)) != NULL) {
1674 fmd_case_impl_t *cip = (fmd_case_impl_t *)cp;
1675 if (cip->ci_xprt != NULL) {
1676 fmd_case_update_status(cp, statusp,
1677 cip->ci_proxy_asru, cip->ci_diag_asru);
1678 fmd_case_update_containees(cp);
1679 fmd_case_update(cp);
1680 }
1681 fmd_case_rele(cp);
1682 }
1683 fmd_module_unlock(xip->xi_queue->eq_mod);
1684 fmd_event_hold(e);
1685 fmd_event_rele(e);
1686 goto done;
1687 }
1688
1689 /*
1690 * If a list.isolated event is received, update resource cache status
1691 */
1692 if (fmd_event_match(e, FMD_EVT_PROTOCOL, FM_LIST_ISOLATED_CLASS)) {
1693 uint8_t *statusp;
1694 uint_t nelem = 0;
1695
1696 (void) nvlist_lookup_uint8_array(nvl, FM_SUSPECT_FAULT_STATUS,
1697 &statusp, &nelem);
1698 fmd_module_lock(xip->xi_queue->eq_mod);
1699 if (nvlist_lookup_string(nvl, FM_SUSPECT_UUID, &uuid) == 0 &&
1700 (cp = fmd_case_hash_lookup(fmd.d_cases, uuid)) != NULL) {
1701 fmd_case_impl_t *cip = (fmd_case_impl_t *)cp;
1702 if (cip->ci_xprt != NULL)
1703 fmd_case_update_status(cp, statusp,
1704 cip->ci_proxy_asru, cip->ci_diag_asru);
1705 fmd_case_rele(cp);
1706 }
1707 fmd_module_unlock(xip->xi_queue->eq_mod);
1708 fmd_event_hold(e);
1709 fmd_event_rele(e);
1710 goto done;
1711 }
1712
1713 /*
1714 * If a list.resolved event is received, resolve the local case.
1715 */
1716 if (fmd_event_match(e, FMD_EVT_PROTOCOL, FM_LIST_RESOLVED_CLASS)) {
1717 fmd_module_lock(xip->xi_queue->eq_mod);
1718 if (nvlist_lookup_string(nvl, FM_SUSPECT_UUID, &uuid) == 0 &&
1719 (cp = fmd_case_hash_lookup(fmd.d_cases, uuid)) != NULL) {
1720 fmd_case_impl_t *cip = (fmd_case_impl_t *)cp;
1721 if (cip->ci_xprt != NULL)
1722 fmd_case_transition(cp, (cip->ci_state ==
1723 FMD_CASE_REPAIRED) ? FMD_CASE_RESOLVED :
1724 (cip->ci_state == FMD_CASE_CLOSED) ?
1725 FMD_CASE_REPAIRED : FMD_CASE_CLOSE_WAIT,
1726 FMD_CF_RESOLVED);
1727 fmd_case_rele(cp);
1728 }
1729 fmd_module_unlock(xip->xi_queue->eq_mod);
1730 fmd_event_hold(e);
1731 fmd_event_rele(e);
1732 goto done;
1733 }
1734
1735 if (logonly == FMD_B_TRUE || (xip->xi_flags & FMD_XPRT_EXTERNAL)) {
1736 /*
1737 * Don't proxy ereports on an EXTERNAL transport - we won't
1738 * know how to diagnose them with the wrong topology. Note
1739 * that here (and above) we have to hold/release the event in
1740 * order for it to be freed.
1741 */
1742 fmd_event_hold(e);
1743 fmd_event_rele(e);
1744 } else if (isproto == FMD_B_TRUE)
1745 fmd_dispq_dispatch(dp->d_disp, e, class);
1746 else
1747 fmd_modhash_dispatch(dp->d_mod_hash, e);
1748 done:
1749 (void) pthread_mutex_lock(&xip->xi_lock);
1750
1751 ASSERT(xip->xi_busy != 0);
1752 xip->xi_busy--;
1753
1754 (void) pthread_cond_broadcast(&xip->xi_cv);
1755 (void) pthread_mutex_unlock(&xip->xi_lock);
1756 }
1757
1758 void
1759 fmd_xprt_uuclose(fmd_xprt_t *xp, const char *uuid)
1760 {
1761 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1762
1763 fmd_event_t *e;
1764 nvlist_t *nvl;
1765 char *s;
1766
1767 if ((xip->xi_flags & FMD_XPRT_RDWR) == FMD_XPRT_RDONLY)
1768 return; /* read-only transports do not proxy uuclose */
1769
1770 TRACE((FMD_DBG_XPRT, "xprt %u closing case %s\n", xip->xi_id, uuid));
1771
1772 nvl = fmd_protocol_xprt_uuclose(xip->xi_queue->eq_mod,
1773 "resource.fm.xprt.uuclose", xip->xi_version, uuid);
1774
1775 (void) nvlist_lookup_string(nvl, FM_CLASS, &s);
1776 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, s);
1777 fmd_eventq_insert_at_time(xip->xi_queue, e);
1778 }
1779
1780 /*
1781 * On proxy side, send back uuresolved request to diagnosing side
1782 */
1783 void
1784 fmd_xprt_uuresolved(fmd_xprt_t *xp, const char *uuid)
1785 {
1786 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1787
1788 fmd_event_t *e;
1789 nvlist_t *nvl;
1790 char *s;
1791
1792 if ((xip->xi_flags & FMD_XPRT_RDWR) == FMD_XPRT_RDONLY)
1793 return; /* read-only transports do not proxy uuresolved */
1794
1795 TRACE((FMD_DBG_XPRT, "xprt %u resolving case %s\n", xip->xi_id, uuid));
1796
1797 nvl = fmd_protocol_xprt_uuresolved(xip->xi_queue->eq_mod,
1798 "resource.fm.xprt.uuresolved", xip->xi_version, uuid);
1799
1800 (void) nvlist_lookup_string(nvl, FM_CLASS, &s);
1801 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, s);
1802 fmd_eventq_insert_at_time(xip->xi_queue, e);
1803 }
1804
1805 /*
1806 * On proxy side, send back repair/acquit/etc request to diagnosing side
1807 */
1808 void
1809 fmd_xprt_updated(fmd_xprt_t *xp, const char *uuid, uint8_t *statusp,
1810 uint8_t *has_asrup, uint_t nelem)
1811 {
1812 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1813
1814 fmd_event_t *e;
1815 nvlist_t *nvl;
1816 char *s;
1817
1818 if ((xip->xi_flags & FMD_XPRT_RDWR) == FMD_XPRT_RDONLY)
1819 return; /* read-only transports do not support remote repairs */
1820
1821 TRACE((FMD_DBG_XPRT, "xprt %u updating case %s\n", xip->xi_id, uuid));
1822
1823 nvl = fmd_protocol_xprt_updated(xip->xi_queue->eq_mod,
1824 "resource.fm.xprt.updated", xip->xi_version, uuid, statusp,
1825 has_asrup, nelem);
1826
1827 (void) nvlist_lookup_string(nvl, FM_CLASS, &s);
1828 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, s);
1829 fmd_eventq_insert_at_time(xip->xi_queue, e);
1830 }
1831
1832 /*
1833 * Insert the specified class into our remote subscription hash. If the class
1834 * is already present, bump the reference count; otherwise add it to the hash
1835 * and then enqueue an event for our remote peer to proxy our subscription.
1836 */
1837 void
1838 fmd_xprt_subscribe(fmd_xprt_t *xp, const char *class)
1839 {
1840 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1841
1842 uint_t refs;
1843 nvlist_t *nvl;
1844 fmd_event_t *e;
1845 char *s;
1846
1847 if ((xip->xi_flags & FMD_XPRT_RDWR) == FMD_XPRT_RDONLY)
1848 return; /* read-only transports do not proxy subscriptions */
1849
1850 if (!(xip->xi_flags & FMD_XPRT_SUBSCRIBER))
1851 return; /* transport is not yet an active subscriber */
1852
1853 (void) pthread_mutex_lock(&xip->xi_lock);
1854 refs = fmd_xprt_class_hash_insert(xip, &xip->xi_rsub, class);
1855 (void) pthread_mutex_unlock(&xip->xi_lock);
1856
1857 if (refs > 1)
1858 return; /* we've already asked our peer for this subscription */
1859
1860 fmd_dprintf(FMD_DBG_XPRT,
1861 "xprt %u subscribing to %s\n", xip->xi_id, class);
1862
1863 nvl = fmd_protocol_xprt_sub(xip->xi_queue->eq_mod,
1864 "resource.fm.xprt.subscribe", xip->xi_version, class);
1865
1866 (void) nvlist_lookup_string(nvl, FM_CLASS, &s);
1867 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, s);
1868 fmd_eventq_insert_at_time(xip->xi_queue, e);
1869 }
1870
1871 /*
1872 * Delete the specified class from the remote subscription hash. If the
1873 * reference count drops to zero, ask our remote peer to unsubscribe by proxy.
1874 */
1875 void
1876 fmd_xprt_unsubscribe(fmd_xprt_t *xp, const char *class)
1877 {
1878 fmd_xprt_impl_t *xip = (fmd_xprt_impl_t *)xp;
1879
1880 uint_t refs;
1881 nvlist_t *nvl;
1882 fmd_event_t *e;
1883 char *s;
1884
1885 if ((xip->xi_flags & FMD_XPRT_RDWR) == FMD_XPRT_RDONLY)
1886 return; /* read-only transports do not proxy subscriptions */
1887
1888 if (!(xip->xi_flags & FMD_XPRT_SUBSCRIBER))
1889 return; /* transport is not yet an active subscriber */
1890
1891 /*
1892 * If the subscription reference count drops to zero in xi_rsub, insert
1893 * an entry into the xi_usub hash indicating we await an unsuback event.
1894 */
1895 (void) pthread_mutex_lock(&xip->xi_lock);
1896
1897 if ((refs = fmd_xprt_class_hash_delete(xip, &xip->xi_rsub, class)) == 0)
1898 (void) fmd_xprt_class_hash_insert(xip, &xip->xi_usub, class);
1899
1900 (void) pthread_mutex_unlock(&xip->xi_lock);
1901
1902 if (refs != 0)
1903 return; /* other subscriptions for this class still active */
1904
1905 fmd_dprintf(FMD_DBG_XPRT,
1906 "xprt %u unsubscribing from %s\n", xip->xi_id, class);
1907
1908 nvl = fmd_protocol_xprt_sub(xip->xi_queue->eq_mod,
1909 "resource.fm.xprt.unsubscribe", xip->xi_version, class);
1910
1911 (void) nvlist_lookup_string(nvl, FM_CLASS, &s);
1912 e = fmd_event_create(FMD_EVT_PROTOCOL, FMD_HRT_NOW, nvl, s);
1913 fmd_eventq_insert_at_time(xip->xi_queue, e);
1914 }
1915
1916 static void
1917 fmd_xprt_subscribe_xid(fmd_idspace_t *ids, id_t id, void *class)
1918 {
1919 fmd_xprt_t *xp;
1920
1921 if ((xp = fmd_idspace_hold(ids, id)) != NULL) {
1922 fmd_xprt_subscribe(xp, class);
1923 fmd_idspace_rele(ids, id);
1924 }
1925 }
1926
1927 void
1928 fmd_xprt_subscribe_all(const char *class)
1929 {
1930 fmd_idspace_t *ids = fmd.d_xprt_ids;
1931
1932 if (ids->ids_count != 0)
1933 fmd_idspace_apply(ids, fmd_xprt_subscribe_xid, (void *)class);
1934 }
1935
1936 static void
1937 fmd_xprt_unsubscribe_xid(fmd_idspace_t *ids, id_t id, void *class)
1938 {
1939 fmd_xprt_t *xp;
1940
1941 if ((xp = fmd_idspace_hold(ids, id)) != NULL) {
1942 fmd_xprt_unsubscribe(xp, class);
1943 fmd_idspace_rele(ids, id);
1944 }
1945 }
1946
1947 void
1948 fmd_xprt_unsubscribe_all(const char *class)
1949 {
1950 fmd_idspace_t *ids = fmd.d_xprt_ids;
1951
1952 if (ids->ids_count != 0)
1953 fmd_idspace_apply(ids, fmd_xprt_unsubscribe_xid, (void *)class);
1954 }
1955
1956 /*ARGSUSED*/
1957 static void
1958 fmd_xprt_suspend_xid(fmd_idspace_t *ids, id_t id, void *arg)
1959 {
1960 fmd_xprt_t *xp;
1961
1962 if ((xp = fmd_idspace_hold(ids, id)) != NULL) {
1963 fmd_xprt_xsuspend(xp, FMD_XPRT_DSUSPENDED);
1964 fmd_idspace_rele(ids, id);
1965 }
1966 }
1967
1968 void
1969 fmd_xprt_suspend_all(void)
1970 {
1971 fmd_idspace_t *ids = fmd.d_xprt_ids;
1972
1973 (void) pthread_mutex_lock(&fmd.d_xprt_lock);
1974
1975 if (fmd.d_xprt_suspend++ != 0) {
1976 (void) pthread_mutex_unlock(&fmd.d_xprt_lock);
1977 return; /* already suspended */
1978 }
1979
1980 if (ids->ids_count != 0)
1981 fmd_idspace_apply(ids, fmd_xprt_suspend_xid, NULL);
1982
1983 (void) pthread_mutex_unlock(&fmd.d_xprt_lock);
1984 }
1985
1986 /*ARGSUSED*/
1987 static void
1988 fmd_xprt_resume_xid(fmd_idspace_t *ids, id_t id, void *arg)
1989 {
1990 fmd_xprt_t *xp;
1991
1992 if ((xp = fmd_idspace_hold(ids, id)) != NULL) {
1993 fmd_xprt_xresume(xp, FMD_XPRT_DSUSPENDED);
1994 fmd_idspace_rele(ids, id);
1995 }
1996 }
1997
1998 void
1999 fmd_xprt_resume_all(void)
2000 {
2001 fmd_idspace_t *ids = fmd.d_xprt_ids;
2002
2003 (void) pthread_mutex_lock(&fmd.d_xprt_lock);
2004
2005 if (fmd.d_xprt_suspend == 0)
2006 fmd_panic("fmd_xprt_suspend/resume_all mismatch\n");
2007
2008 if (--fmd.d_xprt_suspend != 0) {
2009 (void) pthread_mutex_unlock(&fmd.d_xprt_lock);
2010 return; /* not ready to be resumed */
2011 }
2012
2013 if (ids->ids_count != 0)
2014 fmd_idspace_apply(ids, fmd_xprt_resume_xid, NULL);
2015
2016 (void) pthread_mutex_unlock(&fmd.d_xprt_lock);
2017 }