xref: /titanic_41/usr/src/lib/fm/libfmd_snmp/common/problem.c (revision 578ad12299c897d05b437dfe7972276d1e5d3610)
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 2009 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include <sys/fm/protocol.h>
28 #include <fm/fmd_adm.h>
29 #include <fm/fmd_snmp.h>
30 #include <net-snmp/net-snmp-config.h>
31 #include <net-snmp/net-snmp-includes.h>
32 #include <net-snmp/agent/net-snmp-agent-includes.h>
33 #include <pthread.h>
34 #include <stddef.h>
35 #include <errno.h>
36 #include <alloca.h>
37 #include <locale.h>
38 #include <libuutil.h>
39 #include <libnvpair.h>
40 #include "sunFM_impl.h"
41 #include "problem.h"
42 
43 /*
44  * We assume that the number of suspect fault events associated with a
45  * particular case will generally be sufficiently small that the overhead
46  * associated with indexing them in a tree would exceed the gain from
47  * not traversing the fault list for each request.
48  */
49 static uu_avl_pool_t	*problem_uuid_avl_pool;
50 static uu_avl_t		*problem_uuid_avl;
51 
52 #define	VALID_AVL_STATE	(problem_uuid_avl_pool != NULL &&	\
53 	problem_uuid_avl != NULL)
54 
55 #define	UPDATE_WAIT_MILLIS	10	/* poll interval in milliseconds */
56 
57 /*
58  * Update types.  Single-index and all are mutually exclusive.
59  */
60 #define	UCT_INDEX	0x1
61 #define	UCT_ALL		0x2
62 #define	UCT_FLAGS	0x3
63 
64 /*
65  * Locking strategy is described in module.c.
66  */
67 static int		valid_stamp;
68 static pthread_mutex_t	update_lock;
69 static pthread_cond_t	update_cv;
70 static volatile enum { US_QUIET, US_NEEDED, US_INPROGRESS } update_status;
71 
72 static Netsnmp_Node_Handler	sunFmProblemTable_handler;
73 static Netsnmp_Node_Handler	sunFmFaultEventTable_handler;
74 
75 static sunFmProblem_data_t *
problem_key_build(const char * uuid)76 problem_key_build(const char *uuid)
77 {
78 	static sunFmProblem_data_t	key;
79 
80 	key.d_aci_uuid = uuid;
81 
82 	return (&key);
83 }
84 
85 static sunFmProblem_data_t *
problem_lookup_uuid_exact(const char * uuid)86 problem_lookup_uuid_exact(const char *uuid)
87 {
88 	sunFmProblem_data_t	*key, *data;
89 
90 	key = problem_key_build(uuid);
91 
92 	DEBUGMSGTL((MODNAME_STR, "lookup_exact for uuid %s\n", uuid));
93 	data = uu_avl_find(problem_uuid_avl, key, NULL, NULL);
94 
95 	return (data);
96 }
97 
98 static sunFmProblem_data_t *
problem_lookup_uuid_next(const char * uuid)99 problem_lookup_uuid_next(const char *uuid)
100 {
101 	sunFmProblem_data_t	*key, *data;
102 	uu_avl_index_t		idx;
103 
104 	key = problem_key_build(uuid);
105 
106 	DEBUGMSGTL((MODNAME_STR, "lookup_next for uuid %s\n", uuid));
107 	(void) uu_avl_find(problem_uuid_avl, key, NULL, &idx);
108 
109 	data = uu_avl_nearest_next(problem_uuid_avl, idx);
110 
111 	DEBUGMSGTL((MODNAME_STR, "lookup_next: entry is %p\n", data));
112 
113 	return (data);
114 }
115 
116 static sunFmFaultEvent_data_t *
faultevent_lookup_index_exact(sunFmProblem_data_t * data,ulong_t index)117 faultevent_lookup_index_exact(sunFmProblem_data_t *data, ulong_t index)
118 {
119 	if (index > data->d_nsuspects)
120 		return (NULL);
121 
122 	if (data->d_suspects == NULL)
123 		return (NULL);
124 
125 	return (data->d_suspects[index - 1]);
126 }
127 
128 static sunFmFaultStatus_data_t
faultstatus_lookup_index_exact(sunFmProblem_data_t * data,ulong_t index)129 faultstatus_lookup_index_exact(sunFmProblem_data_t *data, ulong_t index)
130 {
131 	if (index > data->d_nsuspects)
132 		return (0);
133 
134 	if (data->d_statuses == NULL)
135 		return (0);
136 
137 	if (data->d_valid != valid_stamp)
138 		return (0);
139 
140 	return (data->d_statuses[index - 1]);
141 }
142 
143 /*ARGSUSED*/
144 static int
problem_update_one(const fmd_adm_caseinfo_t * acp,void * arg)145 problem_update_one(const fmd_adm_caseinfo_t *acp, void *arg)
146 {
147 	sunFmProblem_data_t		*data;
148 	nvlist_t			*nvl;
149 	int64_t				*diag_time;
150 	uint_t				nelem;
151 	uint32_t			nsusp;
152 	int				err;
153 
154 	DEBUGMSGTL((MODNAME_STR, "update_one\n"));
155 
156 	ASSERT(acp->aci_uuid != NULL);
157 
158 	if ((data = problem_lookup_uuid_exact(acp->aci_uuid)) == NULL) {
159 		uu_avl_index_t idx;
160 
161 		DEBUGMSGTL((MODNAME_STR, "found new problem %s\n",
162 		    acp->aci_uuid));
163 		if ((data = SNMP_MALLOC_TYPEDEF(sunFmProblem_data_t)) == NULL) {
164 			(void) snmp_log(LOG_ERR, MODNAME_STR ": Out of memory "
165 			    "for new problem data at %s:%d\n", __FILE__,
166 			    __LINE__);
167 			return (0);
168 		}
169 		if ((err = nvlist_dup(acp->aci_event, &data->d_aci_event, 0))
170 		    != 0) {
171 			(void) snmp_log(LOG_ERR, MODNAME_STR ": Problem data "
172 			    "setup failed: %s\n", strerror(err));
173 			SNMP_FREE(data);
174 			return (0);
175 		}
176 
177 		data->d_aci_uuid = data->d_aci_code = data->d_aci_url = "-";
178 		(void) nvlist_lookup_string(data->d_aci_event, FM_SUSPECT_UUID,
179 		    (char **)&data->d_aci_uuid);
180 		(void) nvlist_lookup_string(data->d_aci_event,
181 		    FM_SUSPECT_DIAG_CODE, (char **)&data->d_aci_code);
182 		data->d_aci_url = strdup(acp->aci_url);
183 
184 		if (nvlist_lookup_nvlist(data->d_aci_event, FM_SUSPECT_DE,
185 		    &nvl) == 0)
186 			if ((data->d_diag_engine = sunFm_nvl2str(nvl)) == NULL)
187 				data->d_diag_engine = "-";
188 
189 		if (nvlist_lookup_int64_array(data->d_aci_event,
190 		    FM_SUSPECT_DIAG_TIME, &diag_time, &nelem) == 0 &&
191 		    nelem >= 2) {
192 			data->d_diag_time.tv_sec = (long)diag_time[0];
193 			data->d_diag_time.tv_usec = (long)diag_time[1];
194 		}
195 
196 		(void) nvlist_lookup_uint32(data->d_aci_event,
197 		    FM_SUSPECT_FAULT_SZ, &nsusp);
198 		data->d_nsuspects = (ulong_t)nsusp;
199 
200 		(void) nvlist_lookup_nvlist_array(data->d_aci_event,
201 		    FM_SUSPECT_FAULT_LIST, &data->d_suspects, &nelem);
202 
203 		ASSERT(nelem == data->d_nsuspects);
204 
205 		(void) nvlist_lookup_uint8_array(data->d_aci_event,
206 		    FM_SUSPECT_FAULT_STATUS, &data->d_statuses, &nelem);
207 
208 		ASSERT(nelem == data->d_nsuspects);
209 
210 		uu_avl_node_init(data, &data->d_uuid_avl,
211 		    problem_uuid_avl_pool);
212 		(void) uu_avl_find(problem_uuid_avl, data, NULL, &idx);
213 		uu_avl_insert(problem_uuid_avl, data, idx);
214 
215 		data->d_valid = valid_stamp;
216 
217 		DEBUGMSGTL((MODNAME_STR, "completed new problem %s@%p\n",
218 		    data->d_aci_uuid, data));
219 	} else {
220 		uint8_t *statuses;
221 		int i;
222 
223 		(void) nvlist_lookup_uint8_array(acp->aci_event,
224 		    FM_SUSPECT_FAULT_STATUS, &statuses, &nelem);
225 
226 		ASSERT(nelem == data->d_nsuspects);
227 
228 		for (i = 0; i < nelem; i++)
229 			data->d_statuses[i] = statuses[i];
230 
231 		data->d_valid = valid_stamp;
232 	}
233 
234 	/*
235 	 * We don't touch problems we've seen before; they shouldn't change
236 	 * in any way we care about, since they've already been solved.  The
237 	 * state, however, could change, and if we later expose that to the
238 	 * client we need to update it here.
239 	 */
240 
241 	return (0);
242 }
243 
244 static int
problem_update(sunFmProblem_update_ctx_t * update_ctx)245 problem_update(sunFmProblem_update_ctx_t *update_ctx)
246 {
247 	fmd_adm_t *adm;
248 
249 	ASSERT(update_ctx != NULL);
250 	ASSERT((update_ctx->uc_type & (UCT_INDEX|UCT_ALL)) !=
251 	    (UCT_INDEX|UCT_ALL));
252 	ASSERT((update_ctx->uc_type & ~UCT_FLAGS) == 0);
253 	ASSERT(VALID_AVL_STATE);
254 
255 	if ((adm = fmd_adm_open(update_ctx->uc_host, update_ctx->uc_prog,
256 	    update_ctx->uc_version)) == NULL) {
257 		(void) snmp_log(LOG_ERR, MODNAME_STR ": Communication with fmd "
258 		    "failed: %s\n", strerror(errno));
259 		return (SNMP_ERR_RESOURCEUNAVAILABLE);
260 	}
261 
262 	++valid_stamp;
263 	if (fmd_adm_case_iter(adm, SNMP_URL_MSG, problem_update_one,
264 	    update_ctx) != 0) {
265 		(void) snmp_log(LOG_ERR, MODNAME_STR ": fmd case information "
266 		    "update failed: %s\n", fmd_adm_errmsg(adm));
267 		fmd_adm_close(adm);
268 		return (SNMP_ERR_RESOURCEUNAVAILABLE);
269 	}
270 
271 	DEBUGMSGTL((MODNAME_STR, "case iteration completed\n"));
272 
273 	fmd_adm_close(adm);
274 	return (SNMP_ERR_NOERROR);
275 }
276 
277 /*ARGSUSED*/
278 static void
update_thread(void * arg)279 update_thread(void *arg)
280 {
281 	/*
282 	 * The current problem_update implementation offers minimal savings
283 	 * for the use of index-only updates; therefore we always do a full
284 	 * update.  If it becomes advantageous to limit updates to a single
285 	 * index, the contexts can be queued by the handler instead.
286 	 */
287 	sunFmProblem_update_ctx_t	uc;
288 
289 	uc.uc_host = NULL;
290 	uc.uc_prog = FMD_ADM_PROGRAM;
291 	uc.uc_version = FMD_ADM_VERSION;
292 
293 	uc.uc_index = NULL;
294 	uc.uc_type = UCT_ALL;
295 
296 	for (;;) {
297 		(void) pthread_mutex_lock(&update_lock);
298 		update_status = US_QUIET;
299 		while (update_status == US_QUIET)
300 			(void) pthread_cond_wait(&update_cv, &update_lock);
301 		update_status = US_INPROGRESS;
302 		(void) pthread_mutex_unlock(&update_lock);
303 		(void) problem_update(&uc);
304 	}
305 }
306 
307 static void
request_update(void)308 request_update(void)
309 {
310 	(void) pthread_mutex_lock(&update_lock);
311 	if (update_status != US_QUIET) {
312 		(void) pthread_mutex_unlock(&update_lock);
313 		return;
314 	}
315 	update_status = US_NEEDED;
316 	(void) pthread_cond_signal(&update_cv);
317 	(void) pthread_mutex_unlock(&update_lock);
318 }
319 
320 /*ARGSUSED*/
321 static int
problem_compare_uuid(const void * l,const void * r,void * private)322 problem_compare_uuid(const void *l, const void *r, void *private)
323 {
324 	sunFmProblem_data_t	*l_data = (sunFmProblem_data_t *)l;
325 	sunFmProblem_data_t	*r_data = (sunFmProblem_data_t *)r;
326 
327 	ASSERT(l_data != NULL && r_data != NULL);
328 
329 	return (strcmp(l_data->d_aci_uuid, r_data->d_aci_uuid));
330 }
331 
332 int
sunFmProblemTable_init(void)333 sunFmProblemTable_init(void)
334 {
335 	static oid sunFmProblemTable_oid[] = { SUNFMPROBLEMTABLE_OID };
336 	netsnmp_table_registration_info *table_info;
337 	netsnmp_handler_registration *handler;
338 	int err;
339 
340 	if ((err = pthread_mutex_init(&update_lock, NULL)) != 0) {
341 		(void) snmp_log(LOG_ERR, MODNAME_STR ": mutex_init failure: "
342 		    "%s\n", strerror(err));
343 		return (MIB_REGISTRATION_FAILED);
344 	}
345 	if ((err = pthread_cond_init(&update_cv, NULL)) != 0) {
346 		(void) snmp_log(LOG_ERR, MODNAME_STR ": cond_init failure: "
347 		    "%s\n", strerror(err));
348 		return (MIB_REGISTRATION_FAILED);
349 	}
350 
351 	if ((err = pthread_create(NULL, NULL, (void *(*)(void *))update_thread,
352 	    NULL)) != 0) {
353 		(void) snmp_log(LOG_ERR, MODNAME_STR ": error creating update "
354 		    "thread: %s\n", strerror(err));
355 		return (MIB_REGISTRATION_FAILED);
356 	}
357 
358 	if ((table_info =
359 	    SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info)) == NULL)
360 		return (MIB_REGISTRATION_FAILED);
361 
362 	if ((handler = netsnmp_create_handler_registration("sunFmProblemTable",
363 	    sunFmProblemTable_handler, sunFmProblemTable_oid,
364 	    OID_LENGTH(sunFmProblemTable_oid), HANDLER_CAN_RONLY)) == NULL) {
365 		SNMP_FREE(table_info);
366 		return (MIB_REGISTRATION_FAILED);
367 	}
368 
369 	/*
370 	 * The Net-SNMP template uses add_indexes here, but that
371 	 * function is unsafe because it does not check for failure.
372 	 */
373 	if (netsnmp_table_helper_add_index(table_info, ASN_OCTET_STR) == NULL) {
374 		SNMP_FREE(table_info);
375 		SNMP_FREE(handler);
376 		return (MIB_REGISTRATION_FAILED);
377 	}
378 
379 	table_info->min_column = SUNFMPROBLEM_COLMIN;
380 	table_info->max_column = SUNFMPROBLEM_COLMAX;
381 
382 	if ((problem_uuid_avl_pool = uu_avl_pool_create("problem_uuid",
383 	    sizeof (sunFmProblem_data_t),
384 	    offsetof(sunFmProblem_data_t, d_uuid_avl), problem_compare_uuid,
385 	    UU_AVL_DEBUG)) == NULL) {
386 		(void) snmp_log(LOG_ERR, MODNAME_STR ": problem_uuid avl pool "
387 		    "creation failed: %s\n", uu_strerror(uu_error()));
388 		snmp_free_varbind(table_info->indexes);
389 		SNMP_FREE(table_info);
390 		SNMP_FREE(handler);
391 		return (MIB_REGISTRATION_FAILED);
392 	}
393 
394 	if ((problem_uuid_avl = uu_avl_create(problem_uuid_avl_pool, NULL,
395 	    UU_AVL_DEBUG)) == NULL) {
396 		(void) snmp_log(LOG_ERR, MODNAME_STR ": problem_uuid avl "
397 		    "creation failed: %s\n", uu_strerror(uu_error()));
398 		snmp_free_varbind(table_info->indexes);
399 		SNMP_FREE(table_info);
400 		SNMP_FREE(handler);
401 		uu_avl_pool_destroy(problem_uuid_avl_pool);
402 		return (MIB_REGISTRATION_FAILED);
403 	}
404 
405 	if ((err = netsnmp_register_table(handler, table_info)) !=
406 	    MIB_REGISTERED_OK) {
407 		snmp_free_varbind(table_info->indexes);
408 		SNMP_FREE(table_info);
409 		SNMP_FREE(handler);
410 		uu_avl_destroy(problem_uuid_avl);
411 		uu_avl_pool_destroy(problem_uuid_avl_pool);
412 		return (err);
413 	}
414 
415 	return (MIB_REGISTERED_OK);
416 }
417 
418 int
sunFmFaultEventTable_init(void)419 sunFmFaultEventTable_init(void)
420 {
421 	static oid sunFmFaultEventTable_oid[] = { SUNFMFAULTEVENTTABLE_OID };
422 	netsnmp_table_registration_info *table_info;
423 	netsnmp_handler_registration *handler;
424 	int err;
425 
426 	if ((table_info =
427 	    SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info)) == NULL)
428 		return (MIB_REGISTRATION_FAILED);
429 
430 	if ((handler =
431 	    netsnmp_create_handler_registration("sunFmFaultEventTable",
432 	    sunFmFaultEventTable_handler, sunFmFaultEventTable_oid,
433 	    OID_LENGTH(sunFmFaultEventTable_oid), HANDLER_CAN_RONLY)) == NULL) {
434 		SNMP_FREE(table_info);
435 		return (MIB_REGISTRATION_FAILED);
436 	}
437 
438 	/*
439 	 * The Net-SNMP template uses add_indexes here, but that
440 	 * function is unsafe because it does not check for failure.
441 	 */
442 	if (netsnmp_table_helper_add_index(table_info, ASN_OCTET_STR) == NULL) {
443 		SNMP_FREE(table_info);
444 		SNMP_FREE(handler);
445 		return (MIB_REGISTRATION_FAILED);
446 	}
447 	if (netsnmp_table_helper_add_index(table_info, ASN_UNSIGNED) == NULL) {
448 		snmp_free_varbind(table_info->indexes);
449 		SNMP_FREE(table_info);
450 		SNMP_FREE(handler);
451 		return (MIB_REGISTRATION_FAILED);
452 	}
453 
454 	table_info->min_column = SUNFMFAULTEVENT_COLMIN;
455 	table_info->max_column = SUNFMFAULTEVENT_COLMAX;
456 
457 	if ((err = netsnmp_register_table(handler, table_info)) !=
458 	    MIB_REGISTERED_OK) {
459 		snmp_free_varbind(table_info->indexes);
460 		SNMP_FREE(table_info);
461 		SNMP_FREE(handler);
462 		return (err);
463 	}
464 
465 	return (MIB_REGISTERED_OK);
466 }
467 
468 /*
469  * Returns the problem data for the problem whose uuid is next according
470  * to ASN.1 lexical ordering after the request in table_info.  Indexes are
471  * updated to reflect the OID of the value being returned.  This allows
472  * us to implement GETNEXT.
473  */
474 static sunFmProblem_data_t *
sunFmProblemTable_nextpr(netsnmp_handler_registration * reginfo,netsnmp_table_request_info * table_info)475 sunFmProblemTable_nextpr(netsnmp_handler_registration *reginfo,
476     netsnmp_table_request_info *table_info)
477 {
478 	sunFmProblem_data_t	*data;
479 	char			*uuid = "";
480 
481 	if (table_info->number_indexes < 1) {
482 		oid tmpoid[MAX_OID_LEN];
483 
484 		DEBUGMSGTL((MODNAME_STR, "nextpr: no indexes given\n"));
485 
486 		snmp_free_varbind(table_info->indexes);
487 		table_info->indexes =
488 		    SNMP_MALLOC_TYPEDEF(netsnmp_variable_list);
489 		(void) snmp_set_var_typed_value(table_info->indexes,
490 		    ASN_OCTET_STR, (const uchar_t *)uuid, 0);
491 		(void) memcpy(tmpoid, reginfo->rootoid,
492 		    reginfo->rootoid_len * sizeof (oid));
493 		tmpoid[reginfo->rootoid_len] = 1;
494 		tmpoid[reginfo->rootoid_len + 1] = table_info->colnum;
495 		if (build_oid_segment(table_info->indexes) != SNMPERR_SUCCESS) {
496 			snmp_free_varbind(table_info->indexes);
497 			return (NULL);
498 		}
499 		table_info->number_indexes = 1;
500 		table_info->index_oid_len = table_info->indexes->name_length;
501 		(void) memcpy(table_info->index_oid, table_info->indexes->name,
502 		    table_info->indexes->name_length);
503 
504 		DEBUGMSGTL((MODNAME_STR, "nextpr: built fake index:\n"));
505 		DEBUGMSGVAR((MODNAME_STR, table_info->indexes));
506 		DEBUGMSG((MODNAME_STR, "\n"));
507 	} else {
508 		/*
509 		 * Construct the next possible UUID to look for.  We can
510 		 * simply increment the least significant byte of the last
511 		 * UUID because (a) that preserves SNMP lex order and (b)
512 		 * the characters that may appear in a UUID do not include
513 		 * 127 nor 255.
514 		 */
515 		uuid = alloca(table_info->indexes->val_len + 1);
516 		(void) strlcpy(uuid,
517 		    (const char *)table_info->indexes->val.string,
518 		    table_info->indexes->val_len + 1);
519 		++uuid[table_info->indexes->val_len - 1];
520 
521 		DEBUGMSGTL((MODNAME_STR, "nextpr: received index:\n"));
522 		DEBUGMSGVAR((MODNAME_STR, table_info->indexes));
523 		DEBUGMSG((MODNAME_STR, "\n"));
524 	}
525 
526 	if ((data = problem_lookup_uuid_next(uuid)) == NULL) {
527 		DEBUGMSGTL((MODNAME_STR, "nextpr: next match not found for "
528 		    "%s; trying next column\n", uuid));
529 		if (table_info->colnum >=
530 		    netsnmp_find_table_registration_info(reginfo)->max_column) {
531 			snmp_free_varbind(table_info->indexes);
532 			table_info->indexes = NULL;
533 			table_info->number_indexes = 0;
534 			DEBUGMSGTL((MODNAME_STR, "nextpr: out of columns\n"));
535 			return (NULL);
536 		}
537 		table_info->colnum++;
538 		DEBUGMSGTL((MODNAME_STR, "nextpr: search for col %u empty "
539 		    "uuid\n", table_info->colnum));
540 
541 		if ((data = problem_lookup_uuid_next("")) == NULL) {
542 			DEBUGMSGTL((MODNAME_STR, "nextpr: next match not found "
543 			    "for empty uuid; stopping\n"));
544 			snmp_free_varbind(table_info->indexes);
545 			table_info->indexes = NULL;
546 			table_info->number_indexes = 0;
547 			return (NULL);
548 		}
549 	}
550 
551 	(void) snmp_set_var_typed_value(table_info->indexes, ASN_OCTET_STR,
552 	    (uchar_t *)data->d_aci_uuid, strlen(data->d_aci_uuid));
553 	table_info->number_indexes = 1;
554 
555 	DEBUGMSGTL((MODNAME_STR, "matching data is %s@%p\n", data->d_aci_uuid,
556 	    data));
557 
558 	return (data);
559 }
560 
561 /*
562  * Returns the problem data corresponding to the request in table_info.
563  * All request parameters are unmodified.
564  */
565 /*ARGSUSED*/
566 static sunFmProblem_data_t *
sunFmProblemTable_pr(netsnmp_handler_registration * reginfo,netsnmp_table_request_info * table_info)567 sunFmProblemTable_pr(netsnmp_handler_registration *reginfo,
568     netsnmp_table_request_info *table_info)
569 {
570 	char			*uuid;
571 
572 	ASSERT(table_info->number_indexes >= 1);
573 
574 	uuid = alloca(table_info->indexes->val_len + 1);
575 	(void) strlcpy(uuid, (const char *)table_info->indexes->val.string,
576 	    table_info->indexes->val_len + 1);
577 
578 	return (problem_lookup_uuid_exact(uuid));
579 }
580 
581 /*
582  * Returns the ASN.1 lexicographically first fault event after the one
583  * identified by table_info.  Indexes are updated to reflect the OID
584  * of the data returned.  This allows us to implement GETNEXT.
585  */
586 static sunFmFaultEvent_data_t *
sunFmFaultEventTable_nextfe(netsnmp_handler_registration * reginfo,netsnmp_table_request_info * table_info,sunFmFaultStatus_data_t * statusp)587 sunFmFaultEventTable_nextfe(netsnmp_handler_registration *reginfo,
588     netsnmp_table_request_info *table_info, sunFmFaultStatus_data_t *statusp)
589 {
590 	sunFmProblem_data_t	*data;
591 	sunFmFaultEvent_data_t	*rv;
592 	netsnmp_variable_list	*var;
593 	ulong_t			index;
594 
595 	for (;;) {
596 		switch (table_info->number_indexes) {
597 		case 2:
598 		default:
599 			DEBUGMSGTL((MODNAME_STR, "nextfe: 2 indices:\n"));
600 			DEBUGMSGVAR((MODNAME_STR, table_info->indexes));
601 			DEBUGMSG((MODNAME_STR, "\n"));
602 			DEBUGMSGVAR((MODNAME_STR,
603 			    table_info->indexes->next_variable));
604 			DEBUGMSG((MODNAME_STR, "\n"));
605 			index = *(ulong_t *)
606 			    table_info->indexes->next_variable->val.integer + 1;
607 
608 			if ((data = sunFmProblemTable_pr(reginfo,
609 			    table_info)) != NULL &&
610 			    (*statusp = faultstatus_lookup_index_exact(data,
611 			    index)) != 0 &&
612 			    (rv = faultevent_lookup_index_exact(data, index)) !=
613 			    NULL) {
614 				(void) snmp_set_var_typed_value(
615 				    table_info->indexes->next_variable,
616 				    ASN_UNSIGNED, (uchar_t *)&index,
617 				    sizeof (index));
618 				return (rv);
619 			}
620 
621 			if (sunFmProblemTable_nextpr(reginfo, table_info) ==
622 			    NULL)
623 				return (NULL);
624 			break;
625 		case 1:
626 			if ((data = sunFmProblemTable_pr(reginfo,
627 			    table_info)) != NULL) {
628 				oid tmpoid[MAX_OID_LEN];
629 				index = 0;
630 
631 				DEBUGMSGTL((MODNAME_STR, "nextfe: 1 index:\n"));
632 				DEBUGMSGVAR((MODNAME_STR, table_info->indexes));
633 				DEBUGMSG((MODNAME_STR, "\n"));
634 				var =
635 				    SNMP_MALLOC_TYPEDEF(netsnmp_variable_list);
636 				(void) snmp_set_var_typed_value(var,
637 				    ASN_UNSIGNED, (uchar_t *)&index,
638 				    sizeof (index));
639 				(void) memcpy(tmpoid, reginfo->rootoid,
640 				    reginfo->rootoid_len * sizeof (oid));
641 				tmpoid[reginfo->rootoid_len] = 1;
642 				tmpoid[reginfo->rootoid_len + 1] =
643 				    table_info->colnum;
644 				if (build_oid_segment(var) != SNMPERR_SUCCESS) {
645 					snmp_free_varbind(var);
646 					return (NULL);
647 				}
648 				snmp_free_varbind(
649 				    table_info->indexes->next_variable);
650 				table_info->indexes->next_variable = var;
651 				table_info->number_indexes = 2;
652 				DEBUGMSGTL((MODNAME_STR, "nextfe: built fake "
653 				    "index:\n"));
654 				DEBUGMSGVAR((MODNAME_STR, table_info->indexes));
655 				DEBUGMSG((MODNAME_STR, "\n"));
656 				DEBUGMSGVAR((MODNAME_STR,
657 				    table_info->indexes->next_variable));
658 				DEBUGMSG((MODNAME_STR, "\n"));
659 			} else {
660 				if (sunFmProblemTable_nextpr(reginfo,
661 				    table_info) == NULL)
662 					return (NULL);
663 			}
664 			break;
665 		case 0:
666 			if (sunFmProblemTable_nextpr(reginfo, table_info) ==
667 			    NULL)
668 				return (NULL);
669 			break;
670 		}
671 	}
672 }
673 
674 static sunFmFaultEvent_data_t *
sunFmFaultEventTable_fe(netsnmp_handler_registration * reginfo,netsnmp_table_request_info * table_info,sunFmFaultStatus_data_t * statusp)675 sunFmFaultEventTable_fe(netsnmp_handler_registration *reginfo,
676     netsnmp_table_request_info *table_info, sunFmFaultStatus_data_t *statusp)
677 {
678 	sunFmProblem_data_t	*data;
679 
680 	ASSERT(table_info->number_indexes == 2);
681 
682 	if ((data = sunFmProblemTable_pr(reginfo, table_info)) == NULL)
683 		return (NULL);
684 
685 	*statusp = faultstatus_lookup_index_exact(data,
686 	    *(ulong_t *)table_info->indexes->next_variable->val.integer);
687 	if (*statusp == 0)
688 		return (NULL);
689 	return (faultevent_lookup_index_exact(data,
690 	    *(ulong_t *)table_info->indexes->next_variable->val.integer));
691 }
692 
693 /*ARGSUSED*/
694 static void
sunFmProblemTable_return(unsigned int reg,void * arg)695 sunFmProblemTable_return(unsigned int reg, void *arg)
696 {
697 	netsnmp_delegated_cache		*cache = (netsnmp_delegated_cache *)arg;
698 	netsnmp_request_info		*request;
699 	netsnmp_agent_request_info	*reqinfo;
700 	netsnmp_handler_registration	*reginfo;
701 	netsnmp_table_request_info	*table_info;
702 	sunFmProblem_data_t		*data;
703 
704 	ASSERT(netsnmp_handler_check_cache(cache) != NULL);
705 
706 	(void) pthread_mutex_lock(&update_lock);
707 	if (update_status != US_QUIET) {
708 		struct timeval			tv;
709 
710 		tv.tv_sec = UPDATE_WAIT_MILLIS / 1000;
711 		tv.tv_usec = (UPDATE_WAIT_MILLIS % 1000) * 1000;
712 
713 		(void) snmp_alarm_register_hr(tv, 0, sunFmProblemTable_return,
714 		    cache);
715 		(void) pthread_mutex_unlock(&update_lock);
716 		return;
717 	}
718 
719 	request = cache->requests;
720 	reqinfo = cache->reqinfo;
721 	reginfo = cache->reginfo;
722 
723 	table_info = netsnmp_extract_table_info(request);
724 	request->delegated = 0;
725 
726 	ASSERT(table_info->colnum >= SUNFMPROBLEM_COLMIN);
727 	ASSERT(table_info->colnum <= SUNFMPROBLEM_COLMAX);
728 
729 	/*
730 	 * table_info->colnum contains the column number requested.
731 	 * table_info->indexes contains a linked list of snmp variable
732 	 * bindings for the indexes of the table.  Values in the list
733 	 * have been set corresponding to the indexes of the
734 	 * request.  We have other guarantees as well:
735 	 *
736 	 * - The column number is always within range.
737 	 * - If we have no index data, table_info->index_oid_len is 0.
738 	 * - We will never receive requests outside our table nor
739 	 *   those with the first subid anything other than 1 (Entry)
740 	 *   nor those without a column number.  This is true even
741 	 *   for GETNEXT requests.
742 	 */
743 
744 	switch (reqinfo->mode) {
745 	case MODE_GET:
746 		if ((data = sunFmProblemTable_pr(reginfo, table_info)) ==
747 		    NULL) {
748 			netsnmp_free_delegated_cache(cache);
749 			(void) pthread_mutex_unlock(&update_lock);
750 			return;
751 		}
752 		break;
753 	case MODE_GETNEXT:
754 	case MODE_GETBULK:
755 		if ((data = sunFmProblemTable_nextpr(reginfo, table_info)) ==
756 		    NULL) {
757 			netsnmp_free_delegated_cache(cache);
758 			(void) pthread_mutex_unlock(&update_lock);
759 			return;
760 		}
761 		break;
762 	default:
763 		(void) snmp_log(LOG_ERR, MODNAME_STR ": Unsupported request "
764 		    "mode %d\n", reqinfo->mode);
765 		netsnmp_free_delegated_cache(cache);
766 		(void) pthread_mutex_unlock(&update_lock);
767 		return;
768 	}
769 
770 	switch (table_info->colnum) {
771 	case SUNFMPROBLEM_COL_UUID:
772 	{
773 		(void) netsnmp_table_build_result(reginfo, request, table_info,
774 		    ASN_OCTET_STR, (uchar_t *)data->d_aci_uuid,
775 		    strlen(data->d_aci_uuid));
776 		break;
777 	}
778 	case SUNFMPROBLEM_COL_CODE:
779 	{
780 		(void) netsnmp_table_build_result(reginfo, request, table_info,
781 		    ASN_OCTET_STR, (uchar_t *)data->d_aci_code,
782 		    strlen(data->d_aci_code));
783 		break;
784 	}
785 	case SUNFMPROBLEM_COL_URL:
786 	{
787 		(void) netsnmp_table_build_result(reginfo, request, table_info,
788 		    ASN_OCTET_STR, (uchar_t *)data->d_aci_url,
789 		    strlen(data->d_aci_url));
790 		break;
791 	}
792 	case SUNFMPROBLEM_COL_DIAGENGINE:
793 	{
794 		(void) netsnmp_table_build_result(reginfo, request, table_info,
795 		    ASN_OCTET_STR, (uchar_t *)data->d_diag_engine,
796 		    strlen(data->d_diag_engine));
797 		break;
798 	}
799 	case SUNFMPROBLEM_COL_DIAGTIME:
800 	{
801 		/*
802 		 * The date_n_time function is not Y2038-safe; this may
803 		 * need to be updated when a suitable Y2038-safe Net-SNMP
804 		 * API is available.
805 		 */
806 		size_t	dt_size;
807 		time_t	dt_time = (time_t)data->d_diag_time.tv_sec;
808 		uchar_t	*dt = date_n_time(&dt_time, &dt_size);
809 
810 		(void) netsnmp_table_build_result(reginfo, request, table_info,
811 		    ASN_OCTET_STR, dt, dt_size);
812 		break;
813 	}
814 	case SUNFMPROBLEM_COL_SUSPECTCOUNT:
815 	{
816 		(void) netsnmp_table_build_result(reginfo, request, table_info,
817 		    ASN_UNSIGNED, (uchar_t *)&data->d_nsuspects,
818 		    sizeof (data->d_nsuspects));
819 		break;
820 	}
821 	default:
822 		break;
823 	}
824 
825 	netsnmp_free_delegated_cache(cache);
826 	(void) pthread_mutex_unlock(&update_lock);
827 }
828 
829 static int
sunFmProblemTable_handler(netsnmp_mib_handler * handler,netsnmp_handler_registration * reginfo,netsnmp_agent_request_info * reqinfo,netsnmp_request_info * requests)830 sunFmProblemTable_handler(netsnmp_mib_handler *handler,
831     netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *reqinfo,
832     netsnmp_request_info *requests)
833 {
834 	netsnmp_request_info		*request;
835 	struct timeval			tv;
836 
837 	tv.tv_sec = UPDATE_WAIT_MILLIS / 1000;
838 	tv.tv_usec = (UPDATE_WAIT_MILLIS % 1000) * 1000;
839 
840 	request_update();
841 
842 	for (request = requests; request; request = request->next) {
843 		if (request->processed != 0)
844 			continue;
845 
846 		if (netsnmp_extract_table_info(request) == NULL)
847 			continue;
848 
849 		request->delegated = 1;
850 		(void) snmp_alarm_register_hr(tv, 0,
851 		    sunFmProblemTable_return,
852 		    (void *) netsnmp_create_delegated_cache(handler, reginfo,
853 		    reqinfo, request, NULL));
854 	}
855 
856 	return (SNMP_ERR_NOERROR);
857 }
858 
859 /*ARGSUSED*/
860 static void
sunFmFaultEventTable_return(unsigned int reg,void * arg)861 sunFmFaultEventTable_return(unsigned int reg, void *arg)
862 {
863 	netsnmp_delegated_cache		*cache = (netsnmp_delegated_cache *)arg;
864 	netsnmp_request_info		*request;
865 	netsnmp_agent_request_info	*reqinfo;
866 	netsnmp_handler_registration	*reginfo;
867 	netsnmp_table_request_info	*table_info;
868 	sunFmProblem_data_t		*pdata;
869 	sunFmFaultEvent_data_t		*data;
870 	sunFmFaultStatus_data_t		status;
871 
872 	ASSERT(netsnmp_handler_check_cache(cache) != NULL);
873 
874 	(void) pthread_mutex_lock(&update_lock);
875 	if (update_status != US_QUIET) {
876 		struct timeval			tv;
877 
878 		tv.tv_sec = UPDATE_WAIT_MILLIS / 1000;
879 		tv.tv_usec = (UPDATE_WAIT_MILLIS % 1000) * 1000;
880 
881 		(void) snmp_alarm_register_hr(tv, 0,
882 		    sunFmFaultEventTable_return, cache);
883 		(void) pthread_mutex_unlock(&update_lock);
884 		return;
885 	}
886 
887 	request = cache->requests;
888 	reqinfo = cache->reqinfo;
889 	reginfo = cache->reginfo;
890 
891 	table_info = netsnmp_extract_table_info(request);
892 	request->delegated = 0;
893 
894 	ASSERT(table_info->colnum >= SUNFMFAULTEVENT_COLMIN);
895 	ASSERT(table_info->colnum <= SUNFMFAULTEVENT_COLMAX);
896 
897 	/*
898 	 * table_info->colnum contains the column number requested.
899 	 * table_info->indexes contains a linked list of snmp variable
900 	 * bindings for the indexes of the table.  Values in the list
901 	 * have been set corresponding to the indexes of the
902 	 * request.  We have other guarantees as well:
903 	 *
904 	 * - The column number is always within range.
905 	 * - If we have no index data, table_info->index_oid_len is 0.
906 	 * - We will never receive requests outside our table nor
907 	 *   those with the first subid anything other than 1 (Entry)
908 	 *   nor those without a column number.  This is true even
909 	 *   for GETNEXT requests.
910 	 */
911 
912 	switch (reqinfo->mode) {
913 	case MODE_GET:
914 		if ((data = sunFmFaultEventTable_fe(reginfo, table_info,
915 		    &status)) == NULL) {
916 			netsnmp_free_delegated_cache(cache);
917 			(void) pthread_mutex_unlock(&update_lock);
918 			return;
919 		}
920 		break;
921 	case MODE_GETNEXT:
922 	case MODE_GETBULK:
923 		if ((data = sunFmFaultEventTable_nextfe(reginfo, table_info,
924 		    &status)) == NULL) {
925 			netsnmp_free_delegated_cache(cache);
926 			(void) pthread_mutex_unlock(&update_lock);
927 			return;
928 		}
929 		break;
930 	default:
931 		(void) snmp_log(LOG_ERR, MODNAME_STR ": Unsupported request "
932 		    "mode %d\n", reqinfo->mode);
933 		netsnmp_free_delegated_cache(cache);
934 		(void) pthread_mutex_unlock(&update_lock);
935 		return;
936 	}
937 
938 	switch (table_info->colnum) {
939 	case SUNFMFAULTEVENT_COL_PROBLEMUUID:
940 	{
941 		if ((pdata = sunFmProblemTable_pr(reginfo, table_info))
942 		    == NULL) {
943 			(void) netsnmp_table_build_result(reginfo, request,
944 			    table_info, ASN_OCTET_STR, NULL, 0);
945 			break;
946 		}
947 		(void) netsnmp_table_build_result(reginfo, request, table_info,
948 		    ASN_OCTET_STR, (uchar_t *)pdata->d_aci_uuid,
949 		    strlen(pdata->d_aci_uuid));
950 		break;
951 	}
952 	case SUNFMFAULTEVENT_COL_CLASS:
953 	{
954 		char	*class = "-";
955 
956 		(void) nvlist_lookup_string(data, FM_CLASS, &class);
957 		(void) netsnmp_table_build_result(reginfo, request, table_info,
958 		    ASN_OCTET_STR, (uchar_t *)class, strlen(class));
959 		break;
960 	}
961 	case SUNFMFAULTEVENT_COL_CERTAINTY:
962 	{
963 		uint8_t	pct = 0;
964 		ulong_t	pl;
965 
966 		(void) nvlist_lookup_uint8(data, FM_FAULT_CERTAINTY,
967 		    &pct);
968 		pl = (ulong_t)pct;
969 		(void) netsnmp_table_build_result(reginfo, request, table_info,
970 		    ASN_UNSIGNED, (uchar_t *)&pl, sizeof (pl));
971 		break;
972 	}
973 	case SUNFMFAULTEVENT_COL_ASRU:
974 	{
975 		nvlist_t	*asru = NULL;
976 		char		*fmri, *str;
977 
978 		(void) nvlist_lookup_nvlist(data, FM_FAULT_ASRU, &asru);
979 		if ((str = sunFm_nvl2str(asru)) == NULL)
980 			fmri = "-";
981 		else
982 			fmri = str;
983 
984 		(void) netsnmp_table_build_result(reginfo, request, table_info,
985 		    ASN_OCTET_STR, (uchar_t *)fmri, strlen(fmri));
986 		free(str);
987 		break;
988 	}
989 	case SUNFMFAULTEVENT_COL_FRU:
990 	{
991 		nvlist_t	*fru = NULL;
992 		char		*fmri, *str;
993 
994 		(void) nvlist_lookup_nvlist(data, FM_FAULT_FRU, &fru);
995 		if ((str = sunFm_nvl2str(fru)) == NULL)
996 			fmri = "-";
997 		else
998 			fmri = str;
999 
1000 		(void) netsnmp_table_build_result(reginfo, request, table_info,
1001 		    ASN_OCTET_STR, (uchar_t *)fmri, strlen(fmri));
1002 		free(str);
1003 		break;
1004 	}
1005 	case SUNFMFAULTEVENT_COL_RESOURCE:
1006 	{
1007 		nvlist_t	*rsrc = NULL;
1008 		char		*fmri, *str;
1009 
1010 		(void) nvlist_lookup_nvlist(data, FM_FAULT_RESOURCE, &rsrc);
1011 		if ((str = sunFm_nvl2str(rsrc)) == NULL)
1012 			fmri = "-";
1013 		else
1014 			fmri = str;
1015 
1016 		(void) netsnmp_table_build_result(reginfo, request, table_info,
1017 		    ASN_OCTET_STR, (uchar_t *)fmri, strlen(fmri));
1018 		free(str);
1019 		break;
1020 	}
1021 	case SUNFMFAULTEVENT_COL_STATUS:
1022 	{
1023 		ulong_t	pl = SUNFMFAULTEVENT_STATE_OTHER;
1024 
1025 		if (status & FM_SUSPECT_FAULTY)
1026 			pl = SUNFMFAULTEVENT_STATE_FAULTY;
1027 		else if (status & FM_SUSPECT_NOT_PRESENT)
1028 			pl = SUNFMFAULTEVENT_STATE_REMOVED;
1029 		else if (status & FM_SUSPECT_REPLACED)
1030 			pl = SUNFMFAULTEVENT_STATE_REPLACED;
1031 		else if (status & FM_SUSPECT_REPAIRED)
1032 			pl = SUNFMFAULTEVENT_STATE_REPAIRED;
1033 		else if (status & FM_SUSPECT_ACQUITTED)
1034 			pl = SUNFMFAULTEVENT_STATE_ACQUITTED;
1035 		(void) netsnmp_table_build_result(reginfo, request, table_info,
1036 		    ASN_INTEGER, (uchar_t *)&pl, sizeof (pl));
1037 		break;
1038 	}
1039 	case SUNFMFAULTEVENT_COL_LOCATION:
1040 	{
1041 		char	*location = "-";
1042 
1043 		(void) nvlist_lookup_string(data, FM_FAULT_LOCATION, &location);
1044 		(void) netsnmp_table_build_result(reginfo, request, table_info,
1045 		    ASN_OCTET_STR, (uchar_t *)location, strlen(location));
1046 		break;
1047 	}
1048 	default:
1049 		break;
1050 	}
1051 
1052 	netsnmp_free_delegated_cache(cache);
1053 	(void) pthread_mutex_unlock(&update_lock);
1054 }
1055 
1056 static int
sunFmFaultEventTable_handler(netsnmp_mib_handler * handler,netsnmp_handler_registration * reginfo,netsnmp_agent_request_info * reqinfo,netsnmp_request_info * requests)1057 sunFmFaultEventTable_handler(netsnmp_mib_handler *handler,
1058     netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *reqinfo,
1059     netsnmp_request_info *requests)
1060 {
1061 	netsnmp_request_info		*request;
1062 	struct timeval			tv;
1063 
1064 	tv.tv_sec = UPDATE_WAIT_MILLIS / 1000;
1065 	tv.tv_usec = (UPDATE_WAIT_MILLIS % 1000) * 1000;
1066 
1067 	request_update();
1068 
1069 	for (request = requests; request; request = request->next) {
1070 		if (request->processed != 0)
1071 			continue;
1072 
1073 		if (netsnmp_extract_table_info(request) == NULL)
1074 			continue;
1075 
1076 		request->delegated = 1;
1077 		(void) snmp_alarm_register_hr(tv, 0,
1078 		    sunFmFaultEventTable_return,
1079 		    (void *) netsnmp_create_delegated_cache(handler, reginfo,
1080 		    reqinfo, request, NULL));
1081 	}
1082 
1083 	return (SNMP_ERR_NOERROR);
1084 }
1085