xref: /titanic_50/usr/src/cmd/fm/fmd/common/fmd_mdb.c (revision 2917a9c9c3eee6fcaedb239f5f68da01f4ed0da9)
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 2007 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include <sys/mdb_modapi.h>
30 
31 #include <fmd_trace.h>
32 #include <fmd_module.h>
33 #include <fmd_thread.h>
34 #include <fmd_ustat.h>
35 #include <fmd_event.h>
36 #include <fmd_case.h>
37 #include <fmd_buf.h>
38 #include <fmd_asru.h>
39 #include <fmd_ckpt.h>
40 #include <fmd_timerq.h>
41 #include <fmd_xprt.h>
42 
43 #include <fmd.h>
44 
45 typedef struct trwalk_state {
46 	struct trwalk_state *trw_next;
47 	fmd_tracebuf_t trw_data;
48 	pthread_t trw_tid;
49 	uintptr_t trw_base;
50 	const fmd_tracerec_t *trw_stop;
51 	fmd_tracerec_t *trw_xrec;
52 } trwalk_state_t;
53 
54 typedef struct hashwalk_data {
55 	uintptr_t *hw_hash;
56 	uint_t hw_hashlen;
57 	uint_t hw_hashidx;
58 	const char *hw_name;
59 	void *hw_data;
60 	size_t hw_size;
61 	size_t hw_next;
62 } hashwalk_data_t;
63 
64 static int
65 trwalk_init(mdb_walk_state_t *wsp)
66 {
67 	uintptr_t addr;
68 	fmd_thread_t thr;
69 	fmd_t F;
70 
71 	if (wsp->walk_addr != NULL) {
72 		mdb_warn("fmd_trace only supports global walks\n");
73 		return (WALK_ERR);
74 	}
75 
76 	if (mdb_readvar(&F, "fmd") != sizeof (F)) {
77 		mdb_warn("failed to read fmd meta-data");
78 		return (WALK_ERR);
79 	}
80 
81 	for (addr = (uintptr_t)F.d_thr_list.l_next; addr != NULL;
82 	    addr = (uintptr_t)thr.thr_list.l_next) {
83 
84 		size_t len, ptr_off, end_off;
85 		fmd_tracerec_t *buf;
86 		trwalk_state_t *t;
87 
88 		if (mdb_vread(&thr, sizeof (thr), addr) != sizeof (thr)) {
89 			mdb_warn("failed to read thread at %p "
90 			    "(some trace data will be unavailable)", addr);
91 			break;
92 		}
93 
94 		t = mdb_zalloc(sizeof (trwalk_state_t), UM_SLEEP);
95 		t->trw_next = wsp->walk_data;
96 		wsp->walk_data = t;
97 
98 		(void) mdb_vread(&t->trw_data,
99 		    sizeof (t->trw_data), (uintptr_t)thr.thr_trdata);
100 
101 		if (t->trw_data.tb_recs == 0)
102 			continue; /* no trace buffer allocated for thread */
103 
104 		len = t->trw_data.tb_recs * t->trw_data.tb_size;
105 		buf = mdb_alloc(len, UM_SLEEP);
106 
107 		t->trw_tid = thr.thr_tid;
108 		t->trw_base = (uintptr_t)t->trw_data.tb_buf;
109 
110 		if (mdb_vread(buf, len, t->trw_base) == -1) {
111 			mdb_warn("failed to read buffer for t%u", t->trw_tid);
112 			bzero(buf, len);
113 		}
114 
115 		end_off = (uintptr_t)t->trw_data.tb_end - t->trw_base;
116 		ptr_off = (uintptr_t)t->trw_data.tb_ptr - t->trw_base;
117 
118 		t->trw_data.tb_buf = buf;
119 		t->trw_data.tb_end = (void *)((uintptr_t)buf + end_off);
120 		t->trw_data.tb_ptr = (void *)((uintptr_t)buf + ptr_off);
121 
122 		if (t->trw_data.tb_ptr < t->trw_data.tb_buf ||
123 		    t->trw_data.tb_ptr > t->trw_data.tb_end) {
124 			mdb_warn("trace record ptr for t%u is corrupt "
125 			    "(some data may be unavailable)\n", t->trw_tid);
126 			t->trw_data.tb_ptr = t->trw_data.tb_buf;
127 		}
128 
129 		t->trw_stop = t->trw_data.tb_ptr;
130 		t->trw_xrec = mdb_alloc(
131 		    t->trw_data.tb_size + sizeof (uintptr_t), UM_SLEEP);
132 	}
133 
134 	return (WALK_NEXT);
135 }
136 
137 static fmd_tracerec_t *
138 trwalk_nextrec(trwalk_state_t *t)
139 {
140 	if (t->trw_stop == NULL)
141 		return (t->trw_data.tb_ptr);
142 
143 	if (t->trw_data.tb_ptr == t->trw_data.tb_buf)
144 		t->trw_data.tb_ptr = t->trw_data.tb_end;
145 	else
146 		t->trw_data.tb_ptr = (fmd_tracerec_t *)
147 		    ((uintptr_t)t->trw_data.tb_ptr - t->trw_data.tb_size);
148 
149 	if (t->trw_data.tb_ptr == t->trw_stop)
150 		t->trw_stop = NULL; /* mark buffer as empty */
151 
152 	return (t->trw_data.tb_ptr);
153 }
154 
155 static int
156 trwalk_step(mdb_walk_state_t *wsp)
157 {
158 	trwalk_state_t *t, *oldest_t;
159 	hrtime_t oldest_time = 0;
160 	fmd_tracerec_t *trp;
161 	int status;
162 
163 	for (t = wsp->walk_data; t != NULL; t = t->trw_next) {
164 		for (trp = t->trw_data.tb_ptr; t->trw_stop != NULL &&
165 		    trp->tr_time == 0; trp = trwalk_nextrec(t))
166 			continue;
167 
168 		if (t->trw_stop == NULL)
169 			continue; /* buffer has been emptied */
170 
171 		if (trp->tr_time > oldest_time) {
172 			oldest_time = trp->tr_time;
173 			oldest_t = t;
174 		}
175 	}
176 
177 	if (oldest_time == 0)
178 		return (WALK_DONE);
179 
180 	t = oldest_t;
181 	trp = t->trw_data.tb_ptr;
182 
183 	bcopy(trp, t->trw_xrec, t->trw_data.tb_size);
184 	t->trw_xrec->tr_depth = MIN(trp->tr_depth, t->trw_data.tb_frames);
185 	t->trw_xrec->tr_stack[t->trw_xrec->tr_depth] = t->trw_tid;
186 
187 	status = wsp->walk_callback((uintptr_t)trp - (uintptr_t)
188 	    t->trw_data.tb_buf + t->trw_base, t->trw_xrec, wsp->walk_cbdata);
189 
190 	(void) trwalk_nextrec(t);
191 	return (status);
192 }
193 
194 static void
195 trwalk_fini(mdb_walk_state_t *wsp)
196 {
197 	trwalk_state_t *t, *u;
198 
199 	for (t = wsp->walk_data; t != NULL; t = u) {
200 		u = t->trw_next;
201 		mdb_free(t->trw_data.tb_buf,
202 		    t->trw_data.tb_recs * t->trw_data.tb_size);
203 		mdb_free(t->trw_xrec, t->trw_data.tb_size + sizeof (uintptr_t));
204 		mdb_free(t, sizeof (trwalk_state_t));
205 	}
206 }
207 
208 /*ARGSUSED*/
209 static int
210 trprint_msg(uintptr_t addr, const fmd_tracerec_t *trp, uintptr_t tid)
211 {
212 	if (tid == 0)
213 		mdb_printf("%3lu ", trp->tr_stack[trp->tr_depth]);
214 	else if (trp->tr_stack[trp->tr_depth] != tid)
215 		return (WALK_NEXT);
216 
217 	mdb_printf("%016llx %04x %-5u %s\n",
218 	    trp->tr_time, 1 << trp->tr_tag, trp->tr_errno, trp->tr_msg);
219 
220 	return (WALK_NEXT);
221 }
222 
223 /*ARGSUSED*/
224 static int
225 trprint_cpp(uintptr_t addr, const fmd_tracerec_t *trp, uintptr_t tid)
226 {
227 	char file[64];
228 
229 	if (tid == 0)
230 		mdb_printf("%3lu ", trp->tr_stack[trp->tr_depth]);
231 	else if (trp->tr_stack[trp->tr_depth] != tid)
232 		return (WALK_NEXT);
233 
234 	if (mdb_readstr(file, sizeof (file), (uintptr_t)trp->tr_file) <= 0)
235 		(void) strcpy(file, "???");
236 
237 	mdb_printf("%016llx %04x %s: %u\n",
238 	    trp->tr_time, 1 << trp->tr_tag, file, trp->tr_line);
239 
240 	return (WALK_NEXT);
241 }
242 
243 static void
244 trprint_stack(const fmd_tracerec_t *trp)
245 {
246 	uint8_t i;
247 
248 	for (i = 0; i < trp->tr_depth; i++)
249 		mdb_printf("\t%a\n", trp->tr_stack[i]);
250 
251 	if (trp->tr_depth != 0)
252 		mdb_printf("\n");
253 }
254 
255 static int
256 trprint_msg_stack(uintptr_t addr, const fmd_tracerec_t *trp, uintptr_t tid)
257 {
258 	int status = trprint_msg(addr, trp, tid);
259 	trprint_stack(trp);
260 	return (status);
261 }
262 
263 static int
264 trprint_cpp_stack(uintptr_t addr, const fmd_tracerec_t *trp, uintptr_t tid)
265 {
266 	int status = trprint_cpp(addr, trp, tid);
267 	trprint_stack(trp);
268 	return (status);
269 }
270 
271 static int
272 fmd_trace(uintptr_t tid, uint_t flags, int argc, const mdb_arg_t *argv)
273 {
274 	int (*func)(uintptr_t, const fmd_tracerec_t *, uintptr_t);
275 	uint_t opt_c = FALSE, opt_s = FALSE;
276 
277 	if (mdb_getopts(argc, argv,
278 	    'c', MDB_OPT_SETBITS, TRUE, &opt_c,
279 	    's', MDB_OPT_SETBITS, TRUE, &opt_s, NULL) != argc)
280 		return (DCMD_USAGE);
281 
282 	if (!(flags & DCMD_ADDRSPEC)) {
283 		mdb_printf("TID ");
284 		tid = 0;
285 	}
286 
287 	if (opt_c) {
288 		mdb_printf("%-16s %-4s FILE:LINE\n", "TIME", "TAG");
289 		func = opt_s ? trprint_cpp_stack : trprint_cpp;
290 	} else {
291 		mdb_printf("%-16s %-4s %-5s MSG\n", "TIME", "TAG", "ERRNO");
292 		func = opt_s ? trprint_msg_stack : trprint_msg;
293 	}
294 
295 	if (mdb_walk("fmd_trace", (mdb_walk_cb_t)func, (void *)tid) == -1) {
296 		mdb_warn("failed to walk fmd_trace");
297 		return (DCMD_ERR);
298 	}
299 
300 	return (DCMD_OK);
301 }
302 
303 static int
304 hash_walk_init(mdb_walk_state_t *wsp, uintptr_t addr, uint_t hashlen,
305     const char *name, size_t size, size_t next)
306 {
307 	hashwalk_data_t *hwp = mdb_alloc(sizeof (hashwalk_data_t), UM_SLEEP);
308 	size_t len = sizeof (uintptr_t) * hashlen;
309 
310 	hwp->hw_hash = mdb_zalloc(len, UM_SLEEP);
311 	(void) mdb_vread(hwp->hw_hash, len, addr);
312 	hwp->hw_hashlen = hashlen;
313 	hwp->hw_hashidx = 0;
314 	hwp->hw_name = name;
315 	hwp->hw_data = mdb_zalloc(size, UM_SLEEP);
316 	hwp->hw_size = size;
317 	hwp->hw_next = next;
318 
319 	wsp->walk_addr = hwp->hw_hash[0];
320 	wsp->walk_data = hwp;
321 
322 	return (WALK_NEXT);
323 }
324 
325 static int
326 hash_walk_step(mdb_walk_state_t *wsp)
327 {
328 	hashwalk_data_t *hwp = wsp->walk_data;
329 	int rv;
330 
331 	while (wsp->walk_addr == NULL) {
332 		if (++hwp->hw_hashidx < hwp->hw_hashlen)
333 			wsp->walk_addr = hwp->hw_hash[hwp->hw_hashidx];
334 		else
335 			return (WALK_DONE);
336 	}
337 
338 	if (mdb_vread(hwp->hw_data, hwp->hw_size, wsp->walk_addr) == -1) {
339 		mdb_warn("failed to read %s at %p",
340 		    hwp->hw_name, wsp->walk_addr);
341 		return (WALK_ERR);
342 	}
343 
344 	rv = wsp->walk_callback(wsp->walk_addr, hwp->hw_data, wsp->walk_cbdata);
345 	wsp->walk_addr = *(uintptr_t *)((uintptr_t)hwp->hw_data + hwp->hw_next);
346 	return (rv);
347 }
348 
349 static void
350 hash_walk_fini(mdb_walk_state_t *wsp)
351 {
352 	hashwalk_data_t *hwp = wsp->walk_data;
353 
354 	mdb_free(hwp->hw_hash, sizeof (uintptr_t) * hwp->hw_hashlen);
355 	mdb_free(hwp->hw_data, hwp->hw_size);
356 	mdb_free(hwp, sizeof (hashwalk_data_t));
357 }
358 
359 static int
360 ustat_walk_init(mdb_walk_state_t *wsp)
361 {
362 	fmd_ustat_t us;
363 
364 	if (mdb_vread(&us, sizeof (us), wsp->walk_addr) != sizeof (us)) {
365 		mdb_warn("failed to read fmd_ustat_t at %p", wsp->walk_addr);
366 		return (WALK_ERR);
367 	}
368 
369 	return (hash_walk_init(wsp,
370 	    (uintptr_t)us.us_hash, us.us_hashlen, NULL, 0, 0));
371 }
372 
373 static int
374 ustat_walk_step(mdb_walk_state_t *wsp)
375 {
376 	hashwalk_data_t *hwp = wsp->walk_data;
377 	fmd_ustat_elem_t ue;
378 	fmd_stat_t s;
379 
380 	while (wsp->walk_addr == NULL) {
381 		if (++hwp->hw_hashidx < hwp->hw_hashlen)
382 			wsp->walk_addr = hwp->hw_hash[hwp->hw_hashidx];
383 		else
384 			return (WALK_DONE);
385 	}
386 
387 	if (mdb_vread(&ue, sizeof (ue), wsp->walk_addr) != sizeof (ue) ||
388 	    mdb_vread(&s, sizeof (s), (uintptr_t)ue.use_stat) != sizeof (s)) {
389 		mdb_warn("failed to read stat element at %p", wsp->walk_addr);
390 		return (WALK_ERR);
391 	}
392 
393 	wsp->walk_addr = (uintptr_t)ue.use_next;
394 
395 	return (wsp->walk_callback(
396 	    (uintptr_t)ue.use_stat, &s, wsp->walk_cbdata));
397 }
398 
399 static int
400 fmd_ustat(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
401 {
402 	if (!(flags & DCMD_ADDRSPEC))
403 		return (DCMD_USAGE);
404 
405 	if (mdb_pwalk_dcmd("fmd_ustat", "fmd_stat", argc, argv, addr) != 0) {
406 		mdb_warn("failed to walk fmd_ustat at %p", addr);
407 		return (DCMD_ERR);
408 	}
409 
410 	return (DCMD_OK);
411 }
412 
413 /*ARGSUSED*/
414 static int
415 fmd_stat(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
416 {
417 	char buf[512];
418 	fmd_stat_t s;
419 
420 	if (!(flags & DCMD_ADDRSPEC) || argc != 0)
421 		return (DCMD_USAGE);
422 
423 	if (DCMD_HDRSPEC(flags))
424 		mdb_printf("%<u>%-11s %-4s %-32s %s%</u>\n",
425 		    "ADDR", "TYPE", "NAME", "VALUE");
426 
427 	if (mdb_vread(&s, sizeof (s), addr) != sizeof (s)) {
428 		mdb_warn("failed to read statistic at %p", addr);
429 		return (DCMD_ERR);
430 	}
431 
432 	switch (s.fmds_type) {
433 	case FMD_TYPE_BOOL:
434 		mdb_printf("%-11p %-4s %-32s %s\n", addr, "bool",
435 		    s.fmds_name, s.fmds_value.bool ? "true" : "false");
436 		break;
437 	case FMD_TYPE_INT32:
438 		mdb_printf("%-11p %-4s %-32s %d\n", addr, "i32",
439 		    s.fmds_name, s.fmds_value.i32);
440 		break;
441 	case FMD_TYPE_UINT32:
442 		mdb_printf("%-11p %-4s %-32s %u\n", addr, "ui32",
443 		    s.fmds_name, s.fmds_value.i32);
444 		break;
445 	case FMD_TYPE_INT64:
446 		mdb_printf("%-11p %-4s %-32s %lld\n", addr, "i64",
447 		    s.fmds_name, s.fmds_value.i64);
448 		break;
449 	case FMD_TYPE_UINT64:
450 		mdb_printf("%-11p %-4s %-32s %llu\n", addr, "ui64",
451 		    s.fmds_name, s.fmds_value.ui64);
452 		break;
453 	case FMD_TYPE_STRING:
454 		if (mdb_readstr(buf, sizeof (buf),
455 		    (uintptr_t)s.fmds_value.str) < 0) {
456 			(void) mdb_snprintf(buf, sizeof (buf), "<%p>",
457 			    s.fmds_value.str);
458 		}
459 		mdb_printf("%-11p %-4s %-32s %s\n", addr, "str",
460 		    s.fmds_name, buf);
461 		break;
462 	case FMD_TYPE_TIME:
463 		mdb_printf("%-11p %-4s %-32s %llu\n", addr, "time",
464 		    s.fmds_name, s.fmds_value.ui64);
465 		break;
466 	case FMD_TYPE_SIZE:
467 		mdb_printf("%-11p %-4s %-32s %llu\n", addr, "size",
468 		    s.fmds_name, s.fmds_value.ui64);
469 		break;
470 	default:
471 		mdb_printf("%-11p %-4u %-32s ???\n", addr,
472 		    s.fmds_type, s.fmds_name);
473 		break;
474 	}
475 
476 	return (DCMD_OK);
477 }
478 
479 /*ARGSUSED*/
480 static int
481 fmd_event(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
482 {
483 	char type[16], name[16];
484 	fmd_event_impl_t ev;
485 
486 	if (argc != 0)
487 		return (DCMD_USAGE);
488 
489 	if (mdb_vread(&ev, sizeof (ev), addr) != sizeof (ev)) {
490 		mdb_warn("failed to read fmd_event at %p", addr);
491 		return (DCMD_ERR);
492 	}
493 
494 	if (DCMD_HDRSPEC(flags)) {
495 		mdb_printf("%<u>%-11s %-4s %-5s %-3s %-?s%</u>\n",
496 		    "ADDR", "TYPE", "STATE", "REF", "NVPAIR");
497 	}
498 
499 	switch (ev.ev_type) {
500 	case FMD_EVT_PROTOCOL:
501 		(void) strcpy(type, "PROT");
502 		break;
503 	case FMD_EVT_GC:
504 		(void) strcpy(type, "GC");
505 		break;
506 	case FMD_EVT_CLOSE:
507 		(void) strcpy(type, "CLSE");
508 		break;
509 	case FMD_EVT_TIMEOUT:
510 		(void) strcpy(type, "TIME");
511 		break;
512 	case FMD_EVT_STATS:
513 		(void) strcpy(type, "STAT");
514 		break;
515 	case FMD_EVT_PUBLISH:
516 		(void) strcpy(type, "PUBL");
517 		break;
518 	case FMD_EVT_TOPO:
519 		(void) strcpy(type, "TOPO");
520 		break;
521 	default:
522 		(void) mdb_snprintf(type, sizeof (type), "%u", ev.ev_type);
523 	}
524 
525 	switch (ev.ev_state) {
526 	case FMD_EVS_RECEIVED:
527 		(void) strcpy(name, "RECVD");
528 		break;
529 	case FMD_EVS_ACCEPTED:
530 		(void) strcpy(name, "ACCPT");
531 		break;
532 	case FMD_EVS_DISCARDED:
533 		(void) strcpy(name, "DSCRD");
534 		break;
535 	case FMD_EVS_DIAGNOSED:
536 		(void) strcpy(name, "DIAGN");
537 		break;
538 	default:
539 		(void) mdb_snprintf(name, sizeof (name), "%u", ev.ev_state);
540 	}
541 
542 	mdb_printf("%-11p %-4s %-5s %-3u %p\n",
543 	    addr, type, name, ev.ev_refs, ev.ev_nvl);
544 
545 	return (DCMD_OK);
546 }
547 
548 static int
549 thread_walk_init(mdb_walk_state_t *wsp)
550 {
551 	fmd_t F;
552 
553 	if (mdb_readvar(&F, "fmd") != sizeof (F)) {
554 		mdb_warn("failed to read fmd meta-data");
555 		return (WALK_ERR);
556 	}
557 
558 	wsp->walk_addr = (uintptr_t)F.d_thr_list.l_next;
559 	return (WALK_NEXT);
560 }
561 
562 static int
563 thread_walk_step(mdb_walk_state_t *wsp)
564 {
565 	uintptr_t addr = wsp->walk_addr;
566 	fmd_thread_t t;
567 
568 	if (addr == NULL)
569 		return (WALK_DONE);
570 
571 	if (mdb_vread(&t, sizeof (t), addr) != sizeof (t)) {
572 		mdb_warn("failed to read fmd_thread at %p", addr);
573 		return (WALK_ERR);
574 	}
575 
576 	wsp->walk_addr = (uintptr_t)t.thr_list.l_next;
577 	return (wsp->walk_callback(addr, &t, wsp->walk_cbdata));
578 }
579 
580 static int
581 fmd_thread(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
582 {
583 	fmd_thread_t thr;
584 
585 	if (!(flags & DCMD_ADDRSPEC))
586 		return (mdb_walk_dcmd("fmd_thread", "fmd_thread", argc, argv));
587 
588 	if (argc != 0)
589 		return (DCMD_USAGE);
590 
591 	if (mdb_vread(&thr, sizeof (thr), addr) != sizeof (thr)) {
592 		mdb_warn("failed to read fmd_thread at %p", addr);
593 		return (DCMD_ERR);
594 	}
595 
596 	if (DCMD_HDRSPEC(flags)) {
597 		mdb_printf("%<u>%-11s %-11s %-8s %-16s%</u>\n",
598 		    "ADDR", "MOD", "TID", "FUNC");
599 	}
600 
601 	mdb_printf("%-11p %-11p %-8u %a\n",
602 	    addr, thr.thr_mod, thr.thr_tid, thr.thr_func);
603 
604 	return (DCMD_OK);
605 }
606 
607 static int
608 mod_walk_init(mdb_walk_state_t *wsp)
609 {
610 	fmd_t F;
611 
612 	if (mdb_readvar(&F, "fmd") != sizeof (F)) {
613 		mdb_warn("failed to read fmd meta-data");
614 		return (WALK_ERR);
615 	}
616 
617 	wsp->walk_addr = (uintptr_t)F.d_mod_list.l_next;
618 	return (WALK_NEXT);
619 }
620 
621 static int
622 mod_walk_step(mdb_walk_state_t *wsp)
623 {
624 	uintptr_t addr = wsp->walk_addr;
625 	fmd_module_t m;
626 
627 	if (addr == NULL)
628 		return (WALK_DONE);
629 
630 	if (mdb_vread(&m, sizeof (m), addr) != sizeof (m)) {
631 		mdb_warn("failed to read fmd_module at %p", addr);
632 		return (WALK_ERR);
633 	}
634 
635 	wsp->walk_addr = (uintptr_t)m.mod_list.l_next;
636 	return (wsp->walk_callback(addr, &m, wsp->walk_cbdata));
637 }
638 
639 static int
640 fmd_module(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
641 {
642 	fmd_module_t mod;
643 	char name[256];
644 
645 	if (!(flags & DCMD_ADDRSPEC))
646 		return (mdb_walk_dcmd("fmd_module", "fmd_module", argc, argv));
647 
648 	if (argc != 0)
649 		return (DCMD_USAGE);
650 
651 	if (mdb_vread(&mod, sizeof (mod), addr) != sizeof (mod)) {
652 		mdb_warn("failed to read fmd_module at %p", addr);
653 		return (DCMD_ERR);
654 	}
655 
656 	if (DCMD_HDRSPEC(flags)) {
657 		mdb_printf("%<u>%-11s %-16s %-11s %-4s %-?s %-16s%</u>\n",
658 		    "ADDR", "OPS", "DATA", "FLAG", "USTAT", "NAME");
659 	}
660 
661 	if (mdb_readstr(name, sizeof (name), (uintptr_t)mod.mod_name) <= 0)
662 		(void) mdb_snprintf(name, sizeof (name), "<%p>", mod.mod_name);
663 
664 	mdb_printf("%-11p %-16a %-11p 0x%02x %-?p %s\n", addr,
665 	    mod.mod_ops, mod.mod_data, mod.mod_flags, mod.mod_ustat, name);
666 
667 	return (DCMD_OK);
668 }
669 
670 static int
671 case_walk_init(mdb_walk_state_t *wsp)
672 {
673 	fmd_module_t mod;
674 	fmd_case_hash_t ch;
675 	fmd_t F;
676 
677 	if (wsp->walk_addr != NULL) {
678 		if (mdb_vread(&mod, sizeof (mod), wsp->walk_addr) == -1) {
679 			mdb_warn("failed to read module at %p", wsp->walk_addr);
680 			return (WALK_ERR);
681 		}
682 
683 		wsp->walk_addr = (uintptr_t)mod.mod_cases.l_next;
684 		return (WALK_NEXT);
685 	}
686 
687 	if (mdb_readvar(&F, "fmd") != sizeof (F) ||
688 	    mdb_vread(&ch, sizeof (ch), (uintptr_t)F.d_cases) != sizeof (ch)) {
689 		mdb_warn("failed to read fmd meta-data");
690 		return (WALK_ERR);
691 	}
692 
693 	return (hash_walk_init(wsp, (uintptr_t)ch.ch_hash, ch.ch_hashlen,
694 	    "fmd_case", sizeof (fmd_case_impl_t),
695 	    OFFSETOF(fmd_case_impl_t, ci_next)));
696 }
697 
698 static int
699 case_walk_step(mdb_walk_state_t *wsp)
700 {
701 	uintptr_t addr = wsp->walk_addr;
702 	fmd_case_impl_t ci;
703 
704 	if (wsp->walk_data != NULL)
705 		return (hash_walk_step(wsp));
706 
707 	if (addr == NULL)
708 		return (WALK_DONE);
709 
710 	if (mdb_vread(&ci, sizeof (ci), addr) != sizeof (ci)) {
711 		mdb_warn("failed to read fmd_case at %p", addr);
712 		return (WALK_ERR);
713 	}
714 
715 	wsp->walk_addr = (uintptr_t)ci.ci_list.l_next;
716 	return (wsp->walk_callback(addr, &ci, wsp->walk_cbdata));
717 }
718 
719 static void
720 case_walk_fini(mdb_walk_state_t *wsp)
721 {
722 	if (wsp->walk_data != NULL)
723 		hash_walk_fini(wsp);
724 }
725 
726 static int
727 fmd_case(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
728 {
729 	char uuid[48], name[16];
730 	fmd_case_impl_t ci;
731 
732 	if (!(flags & DCMD_ADDRSPEC)) {
733 		if (mdb_walk_dcmd("fmd_case", "fmd_case", argc, argv) != 0) {
734 			mdb_warn("failed to walk fmd_case hash");
735 			return (DCMD_ERR);
736 		}
737 		return (DCMD_OK);
738 	}
739 
740 	if (mdb_vread(&ci, sizeof (ci), addr) != sizeof (ci)) {
741 		mdb_warn("failed to read fmd_case at %p", addr);
742 		return (DCMD_ERR);
743 	}
744 
745 	if (DCMD_HDRSPEC(flags)) {
746 		mdb_printf("%<u>%-11s %-5s %-3s %-?s %-36s%</u>\n",
747 		    "ADDR", "STATE", "REF", "DATA", "UUID");
748 	}
749 
750 	if (mdb_readstr(uuid, sizeof (uuid), (uintptr_t)ci.ci_uuid) <= 0)
751 		(void) mdb_snprintf(uuid, sizeof (uuid), "<%p>", ci.ci_uuid);
752 
753 	switch (ci.ci_state) {
754 	case FMD_CASE_UNSOLVED:
755 		(void) strcpy(name, "UNSLV");
756 		break;
757 	case FMD_CASE_SOLVED:
758 		(void) strcpy(name, "SOLVE");
759 		break;
760 	case FMD_CASE_CLOSE_WAIT:
761 		(void) strcpy(name, "CWAIT");
762 		break;
763 	case FMD_CASE_CLOSED:
764 		(void) strcpy(name, "CLOSE");
765 		break;
766 	case FMD_CASE_REPAIRED:
767 		(void) strcpy(name, "RPAIR");
768 		break;
769 	default:
770 		(void) mdb_snprintf(name, sizeof (name), "%u", ci.ci_state);
771 	}
772 
773 	mdb_printf("%-11p %-5s %-3u %-?p %s\n",
774 	    addr, name, ci.ci_refs, ci.ci_data, uuid);
775 
776 	return (DCMD_OK);
777 }
778 
779 static int
780 buf_walk_init(mdb_walk_state_t *wsp)
781 {
782 	fmd_buf_hash_t bh;
783 
784 	if (mdb_vread(&bh, sizeof (bh), wsp->walk_addr) != sizeof (bh)) {
785 		mdb_warn("failed to read fmd_buf_hash_t at %p", wsp->walk_addr);
786 		return (WALK_ERR);
787 	}
788 
789 	return (hash_walk_init(wsp, (uintptr_t)bh.bh_hash, bh.bh_hashlen,
790 	    "fmd_buf", sizeof (fmd_buf_t), OFFSETOF(fmd_buf_t, buf_next)));
791 }
792 
793 /*ARGSUSED*/
794 static int
795 fmd_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
796 {
797 	char name[256];
798 	fmd_buf_t b;
799 
800 	if (argc != 0 || !(flags & DCMD_ADDRSPEC))
801 		return (DCMD_USAGE);
802 
803 	if (mdb_vread(&b, sizeof (b), addr) != sizeof (b)) {
804 		mdb_warn("failed to read fmd_buf at %p", addr);
805 		return (DCMD_ERR);
806 	}
807 
808 	if (DCMD_HDRSPEC(flags)) {
809 		mdb_printf("%<u>%-11s %-32s %-5s %-?s %s%</u>\n",
810 		    "ADDR", "NAME", "FLAGS", "DATA", "SIZE");
811 	}
812 
813 	if (mdb_readstr(name, sizeof (name), (uintptr_t)b.buf_name) <= 0)
814 		(void) mdb_snprintf(name, sizeof (name), "<%p>", b.buf_name);
815 
816 	mdb_printf("%-11p %-32s %-#5x %-?p %lu\n",
817 	    addr, name, b.buf_flags, b.buf_data, b.buf_size);
818 
819 	return (DCMD_OK);
820 }
821 
822 static int
823 serd_walk_init(mdb_walk_state_t *wsp)
824 {
825 	fmd_serd_hash_t sh;
826 
827 	if (mdb_vread(&sh, sizeof (sh), wsp->walk_addr) != sizeof (sh)) {
828 		mdb_warn("failed to read fmd_serd_hash at %p", wsp->walk_addr);
829 		return (WALK_ERR);
830 	}
831 
832 	return (hash_walk_init(wsp, (uintptr_t)sh.sh_hash, sh.sh_hashlen,
833 	    "fmd_serd_eng", sizeof (fmd_serd_eng_t),
834 	    OFFSETOF(fmd_serd_eng_t, sg_next)));
835 }
836 
837 /*ARGSUSED*/
838 static int
839 fmd_serd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
840 {
841 	char name[256];
842 	fmd_serd_eng_t sg;
843 
844 	if (argc != 0 || !(flags & DCMD_ADDRSPEC))
845 		return (DCMD_USAGE);
846 
847 	if (mdb_vread(&sg, sizeof (sg), addr) != sizeof (sg)) {
848 		mdb_warn("failed to read fmd_serd_eng at %p", addr);
849 		return (DCMD_ERR);
850 	}
851 
852 	if (DCMD_HDRSPEC(flags)) {
853 		mdb_printf("%<u>%-11s %-32s %-3s F >%-2s %-16s%</u>\n",
854 		    "ADDR", "NAME", "CNT", "N", "T");
855 	}
856 
857 	if (mdb_readstr(name, sizeof (name), (uintptr_t)sg.sg_name) <= 0)
858 		(void) mdb_snprintf(name, sizeof (name), "<%p>", sg.sg_name);
859 
860 	mdb_printf("%-11p %-32s %-3u %c >%-2u %lluns\n",
861 	    addr, name, sg.sg_count, (sg.sg_flags & FMD_SERD_FIRED) ? 'F' : ' ',
862 	    sg.sg_n, (u_longlong_t)sg.sg_t);
863 
864 	return (DCMD_OK);
865 }
866 
867 static int
868 asru_walk_init(mdb_walk_state_t *wsp)
869 {
870 	fmd_asru_hash_t ah;
871 	fmd_t F;
872 
873 	if (wsp->walk_addr == NULL && mdb_readvar(&F, "fmd") != sizeof (F)) {
874 		mdb_warn("failed to read fmd meta-data");
875 		return (WALK_ERR);
876 	}
877 
878 	if (wsp->walk_addr == NULL)
879 		wsp->walk_addr = (uintptr_t)F.d_asrus;
880 
881 	if (mdb_vread(&ah, sizeof (ah), wsp->walk_addr) != sizeof (ah)) {
882 		mdb_warn("failed to read asru_hash at %p", wsp->walk_addr);
883 		return (WALK_ERR);
884 	}
885 
886 	return (hash_walk_init(wsp, (uintptr_t)ah.ah_hash, ah.ah_hashlen,
887 	    "fmd_asru", sizeof (fmd_asru_t), OFFSETOF(fmd_asru_t, asru_next)));
888 }
889 
890 static int
891 fmd_asru(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
892 {
893 	char uuid[48], name[256];
894 	fmd_asru_t a;
895 
896 	if (!(flags & DCMD_ADDRSPEC)) {
897 		if (mdb_walk_dcmd("fmd_asru", "fmd_asru", argc, argv) != 0) {
898 			mdb_warn("failed to walk fmd_asru hash");
899 			return (DCMD_ERR);
900 		}
901 		return (DCMD_OK);
902 	}
903 
904 	if (mdb_vread(&a, sizeof (a), addr) != sizeof (a)) {
905 		mdb_warn("failed to read fmd_asru at %p", addr);
906 		return (DCMD_ERR);
907 	}
908 
909 	if (DCMD_HDRSPEC(flags))
910 		mdb_printf("%<u>%-8s %-36s %s%</u>\n", "ADDR", "UUID", "NAME");
911 
912 	if (mdb_readstr(uuid, sizeof (uuid), (uintptr_t)a.asru_uuid) <= 0)
913 		(void) mdb_snprintf(uuid, sizeof (uuid), "<%p>", a.asru_uuid);
914 	if (mdb_readstr(name, sizeof (name), (uintptr_t)a.asru_name) <= 0)
915 		(void) mdb_snprintf(name, sizeof (name), "<%p>", a.asru_name);
916 
917 	mdb_printf("%-8p %-36s %s\n", addr, uuid, name);
918 	return (DCMD_OK);
919 }
920 
921 /*ARGSUSED*/
922 static int
923 fcf_hdr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
924 {
925 	fcf_hdr_t h;
926 
927 	if (argc != 0)
928 		return (DCMD_USAGE);
929 
930 	if (!(flags & DCMD_ADDRSPEC))
931 		addr = 0; /* assume base of file in file target */
932 
933 	if (mdb_vread(&h, sizeof (h), addr) != sizeof (h)) {
934 		mdb_warn("failed to read header at %p", addr);
935 		return (DCMD_ERR);
936 	}
937 
938 	mdb_printf("fcfh_ident.id_magic = 0x%x, %c, %c, %c\n",
939 	    h.fcfh_ident[FCF_ID_MAG0], h.fcfh_ident[FCF_ID_MAG1],
940 	    h.fcfh_ident[FCF_ID_MAG2], h.fcfh_ident[FCF_ID_MAG3]);
941 
942 	switch (h.fcfh_ident[FCF_ID_MODEL]) {
943 	case FCF_MODEL_ILP32:
944 		mdb_printf("fcfh_ident.id_model = ILP32\n");
945 		break;
946 	case FCF_MODEL_LP64:
947 		mdb_printf("fcfh_ident.id_model = LP64\n");
948 		break;
949 	default:
950 		mdb_printf("fcfh_ident.id_model = 0x%x\n",
951 		    h.fcfh_ident[FCF_ID_MODEL]);
952 	}
953 
954 	switch (h.fcfh_ident[FCF_ID_ENCODING]) {
955 	case FCF_ENCODE_LSB:
956 		mdb_printf("fcfh_ident.id_encoding = LSB\n");
957 		break;
958 	case FCF_ENCODE_MSB:
959 		mdb_printf("fcfh_ident.id_encoding = MSB\n");
960 		break;
961 	default:
962 		mdb_printf("fcfh_ident.id_encoding = 0x%x\n",
963 		    h.fcfh_ident[FCF_ID_ENCODING]);
964 	}
965 
966 	mdb_printf("fcfh_ident.id_version = %u\n",
967 	    h.fcfh_ident[FCF_ID_VERSION]);
968 
969 	mdb_printf("fcfh_flags = 0x%x\n", h.fcfh_flags);
970 	mdb_printf("fcfh_hdrsize = %u\n", h.fcfh_hdrsize);
971 	mdb_printf("fcfh_secsize = %u\n", h.fcfh_secsize);
972 	mdb_printf("fcfh_secnum = %u\n", h.fcfh_secnum);
973 	mdb_printf("fcfh_secoff = %llu\n", h.fcfh_secoff);
974 	mdb_printf("fcfh_filesz = %llu\n", h.fcfh_filesz);
975 	mdb_printf("fcfh_cgen = %llu\n", h.fcfh_cgen);
976 
977 	return (DCMD_OK);
978 }
979 
980 /*ARGSUSED*/
981 static int
982 fcf_sec_one(uintptr_t addr, void *ignored, uint_t *secp)
983 {
984 	static int fcf_sec(uintptr_t, uint_t, int, const mdb_arg_t *);
985 
986 	mdb_printf("%3d ", (*secp)++);
987 	(void) fcf_sec(addr, DCMD_ADDRSPEC | DCMD_LOOP, 0, NULL);
988 	return (WALK_NEXT);
989 }
990 
991 /*ARGSUSED*/
992 static int
993 fcf_sec(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
994 {
995 	static const char *const types[] = {
996 		"none",		/* FCF_SECT_NONE */
997 		"strtab",	/* FCF_SECT_STRTAB */
998 		"module",	/* FCF_SECT_MODULE */
999 		"case",		/* FCF_SECT_CASE */
1000 		"bufs",		/* FCF_SECT_BUFS */
1001 		"buffer",	/* FCF_SECT_BUFFER */
1002 		"serd",		/* FCF_SECT_SERD */
1003 		"events",	/* FCF_SECT_EVENTS */
1004 		"nvlists",	/* FCF_SECT_NVLISTS */
1005 	};
1006 
1007 	uint_t sec = 0;
1008 	fcf_sec_t s;
1009 
1010 	if (!(flags & DCMD_ADDRSPEC))
1011 		mdb_printf("%<u>%-3s ", "NDX");
1012 
1013 	if (!(flags & DCMD_ADDRSPEC) || DCMD_HDRSPEC(flags)) {
1014 		mdb_printf("%<u>%?s %-10s %-5s %-5s %-5s %-6s %-5s%</u>\n",
1015 		    "ADDR", "TYPE", "ALIGN", "FLAGS", "ENTSZ", "OFF", "SIZE");
1016 	}
1017 
1018 	if (!(flags & DCMD_ADDRSPEC)) {
1019 		if (mdb_walk("fcf_sec", (mdb_walk_cb_t)fcf_sec_one, &sec) < 0) {
1020 			mdb_warn("failed to walk fcf_sec");
1021 			return (DCMD_ERR);
1022 		}
1023 		return (DCMD_OK);
1024 	}
1025 
1026 	if (argc != 0)
1027 		return (DCMD_USAGE);
1028 
1029 	if (mdb_vread(&s, sizeof (s), addr) != sizeof (s)) {
1030 		mdb_warn("failed to read section header at %p", addr);
1031 		return (DCMD_ERR);
1032 	}
1033 
1034 	mdb_printf("%?p ", addr);
1035 
1036 	if (s.fcfs_type < sizeof (types) / sizeof (types[0]))
1037 		mdb_printf("%-10s ", types[s.fcfs_type]);
1038 	else
1039 		mdb_printf("%-10u ", s.fcfs_type);
1040 
1041 	mdb_printf("%-5u %-#5x %-#5x %-6llx %-#5llx\n", s.fcfs_align,
1042 	    s.fcfs_flags, s.fcfs_entsize, s.fcfs_offset, s.fcfs_size);
1043 
1044 	return (DCMD_OK);
1045 }
1046 
1047 static int
1048 fcf_sec_walk_init(mdb_walk_state_t *wsp)
1049 {
1050 	fcf_hdr_t h, *hp;
1051 	size_t size;
1052 
1053 	if (mdb_vread(&h, sizeof (h), wsp->walk_addr) != sizeof (h)) {
1054 		mdb_warn("failed to read FCF header at %p", wsp->walk_addr);
1055 		return (WALK_ERR);
1056 	}
1057 
1058 	size = sizeof (fcf_hdr_t) + sizeof (fcf_sec_t) * h.fcfh_secnum;
1059 	hp = mdb_alloc(size, UM_SLEEP);
1060 
1061 	if (mdb_vread(hp, size, wsp->walk_addr) != size) {
1062 		mdb_warn("failed to read FCF sections at %p", wsp->walk_addr);
1063 		mdb_free(hp, size);
1064 		return (WALK_ERR);
1065 	}
1066 
1067 	wsp->walk_data = hp;
1068 	wsp->walk_arg = 0;
1069 
1070 	return (WALK_NEXT);
1071 }
1072 
1073 static int
1074 fcf_sec_walk_step(mdb_walk_state_t *wsp)
1075 {
1076 	uint_t i = (uint_t)wsp->walk_arg;
1077 	size_t off = sizeof (fcf_hdr_t) + sizeof (fcf_sec_t) * i;
1078 	fcf_hdr_t *hp = wsp->walk_data;
1079 	fcf_sec_t *sp = (fcf_sec_t *)((uintptr_t)hp + off);
1080 
1081 	if (i >= hp->fcfh_secnum)
1082 		return (WALK_DONE);
1083 
1084 	wsp->walk_arg = (void *)(i + 1);
1085 	return (wsp->walk_callback(wsp->walk_addr + off, sp, wsp->walk_cbdata));
1086 }
1087 
1088 static void
1089 fcf_sec_walk_fini(mdb_walk_state_t *wsp)
1090 {
1091 	fcf_hdr_t *hp = wsp->walk_data;
1092 	mdb_free(hp, sizeof (fcf_hdr_t) + sizeof (fcf_sec_t) * hp->fcfh_secnum);
1093 }
1094 
1095 /*ARGSUSED*/
1096 static int
1097 fcf_case(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1098 {
1099 	fcf_case_t fcfc;
1100 
1101 	if (argc != 0)
1102 		return (DCMD_USAGE);
1103 
1104 	if (mdb_vread(&fcfc, sizeof (fcfc), addr) != sizeof (fcfc)) {
1105 		mdb_warn("failed to read case at %p", addr);
1106 		return (DCMD_ERR);
1107 	}
1108 
1109 	mdb_printf("fcfc_uuid = 0x%x\n", fcfc.fcfc_uuid);
1110 	mdb_printf("fcfc_state = %u\n", fcfc.fcfc_state);
1111 	mdb_printf("fcfc_bufs = %u\n", fcfc.fcfc_bufs);
1112 	mdb_printf("fcfc_events = %u\n", fcfc.fcfc_events);
1113 	mdb_printf("fcfc_suspects = %u\n", fcfc.fcfc_suspects);
1114 
1115 	return (DCMD_OK);
1116 }
1117 
1118 /*ARGSUSED*/
1119 static int
1120 fcf_event(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1121 {
1122 	fcf_event_t fcfe;
1123 
1124 	if (argc != 0)
1125 		return (DCMD_USAGE);
1126 
1127 	if (mdb_vread(&fcfe, sizeof (fcfe), addr) != sizeof (fcfe)) {
1128 		mdb_warn("failed to read event at %p", addr);
1129 		return (DCMD_ERR);
1130 	}
1131 
1132 	mdb_printf("fcfe_todsec = %llu (%Y)\n",
1133 	    fcfe.fcfe_todsec, (time_t)fcfe.fcfe_todsec);
1134 	mdb_printf("fcfe_todnsec = %llu\n", fcfe.fcfe_todnsec);
1135 	mdb_printf("fcfe_major = %u\n", fcfe.fcfe_major);
1136 	mdb_printf("fcfe_minor = %u\n", fcfe.fcfe_minor);
1137 	mdb_printf("fcfe_inode = %llu\n", fcfe.fcfe_inode);
1138 	mdb_printf("fcfe_offset = %llu\n", fcfe.fcfe_offset);
1139 
1140 	return (DCMD_OK);
1141 }
1142 
1143 /*ARGSUSED*/
1144 static int
1145 fcf_serd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1146 {
1147 	fcf_serd_t fcfd;
1148 
1149 	if (argc != 0)
1150 		return (DCMD_USAGE);
1151 
1152 	if (mdb_vread(&fcfd, sizeof (fcfd), addr) != sizeof (fcfd)) {
1153 		mdb_warn("failed to read serd at %p", addr);
1154 		return (DCMD_ERR);
1155 	}
1156 
1157 	mdb_printf("fcfd_name = 0x%x\n", fcfd.fcfd_name);
1158 	mdb_printf("fcfd_events = %u\n", fcfd.fcfd_events);
1159 	mdb_printf("fcfd_n = >%u\n", fcfd.fcfd_n);
1160 	mdb_printf("fcfd_t = %lluns\n", fcfd.fcfd_t);
1161 
1162 	return (DCMD_OK);
1163 }
1164 
1165 static int
1166 tmq_walk_init(mdb_walk_state_t *wsp)
1167 {
1168 	fmd_timerq_t tmq;
1169 	fmd_t F;
1170 
1171 	if (wsp->walk_addr == NULL && mdb_readvar(&F, "fmd") != sizeof (F)) {
1172 		mdb_warn("failed to read fmd meta-data");
1173 		return (WALK_ERR);
1174 	}
1175 
1176 	if (wsp->walk_addr == NULL)
1177 		wsp->walk_addr = (uintptr_t)F.d_timers;
1178 
1179 	if (mdb_vread(&tmq, sizeof (tmq), wsp->walk_addr) != sizeof (tmq)) {
1180 		mdb_warn("failed to read timerq at %p", wsp->walk_addr);
1181 		return (WALK_ERR);
1182 	}
1183 
1184 	wsp->walk_addr = (uintptr_t)tmq.tmq_list.l_next;
1185 	return (WALK_NEXT);
1186 }
1187 
1188 static int
1189 tmq_walk_step(mdb_walk_state_t *wsp)
1190 {
1191 	uintptr_t addr = wsp->walk_addr;
1192 	fmd_timer_t tmr;
1193 
1194 	if (addr == NULL)
1195 		return (WALK_DONE);
1196 
1197 	if (mdb_vread(&tmr, sizeof (tmr), addr) != sizeof (tmr)) {
1198 		mdb_warn("failed to read fmd_timer at %p", addr);
1199 		return (WALK_ERR);
1200 	}
1201 
1202 	wsp->walk_addr = (uintptr_t)tmr.tmr_list.l_next;
1203 	return (wsp->walk_callback(addr, &tmr, wsp->walk_cbdata));
1204 }
1205 
1206 static int
1207 fmd_timer(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1208 {
1209 	char name[32], func[MDB_SYM_NAMLEN];
1210 	fmd_timer_t t;
1211 
1212 	if (!(flags & DCMD_ADDRSPEC)) {
1213 		if (mdb_walk_dcmd("fmd_timerq", "fmd_timer", argc, argv) != 0) {
1214 			mdb_warn("failed to walk fmd_timerq");
1215 			return (DCMD_ERR);
1216 		}
1217 		return (DCMD_OK);
1218 	}
1219 
1220 	if (mdb_vread(&t, sizeof (t), addr) != sizeof (t)) {
1221 		mdb_warn("failed to read fmd_timer at %p", addr);
1222 		return (DCMD_ERR);
1223 	}
1224 
1225 	if (DCMD_HDRSPEC(flags)) {
1226 		mdb_printf("%<u>%-8s %-20s %-4s %-18s %-8s %s%</u>\n",
1227 		    "ADDR", "MODULE", "ID", "HRTIME", "ARG", "FUNC");
1228 	}
1229 
1230 	if (mdb_readstr(name, sizeof (name), (uintptr_t)
1231 	    t.tmr_ids + OFFSETOF(fmd_idspace_t, ids_name)) <= 0)
1232 		(void) mdb_snprintf(name, sizeof (name), "<%p>", t.tmr_ids);
1233 
1234 	if (mdb_lookup_by_addr((uintptr_t)t.tmr_func, MDB_SYM_FUZZY,
1235 	    func, sizeof (func), NULL) != 0)
1236 		(void) mdb_snprintf(func, sizeof (func), "<%p>", t.tmr_func);
1237 
1238 	mdb_printf("%-8p %-20s %4d 0x%-16llx %-8p %s\n",
1239 	    addr, name, t.tmr_id, t.tmr_hrt, t.tmr_arg, func);
1240 	return (DCMD_OK);
1241 }
1242 
1243 static int
1244 xprt_walk_init(mdb_walk_state_t *wsp)
1245 {
1246 	fmd_module_t m;
1247 
1248 	if (wsp->walk_addr == NULL) {
1249 		mdb_warn("transport walker requires fmd_module_t address\n");
1250 		return (WALK_ERR);
1251 	}
1252 
1253 	if (mdb_vread(&m, sizeof (m), wsp->walk_addr) != sizeof (m)) {
1254 		mdb_warn("failed to read module at %p", wsp->walk_addr);
1255 		return (WALK_ERR);
1256 	}
1257 
1258 	wsp->walk_addr = (uintptr_t)m.mod_transports.l_next;
1259 	return (WALK_NEXT);
1260 }
1261 
1262 static int
1263 xprt_walk_step(mdb_walk_state_t *wsp)
1264 {
1265 	uintptr_t addr = wsp->walk_addr;
1266 	fmd_xprt_impl_t xi;
1267 
1268 	if (addr == NULL)
1269 		return (WALK_DONE);
1270 
1271 	if (mdb_vread(&xi, sizeof (xi), addr) != sizeof (xi)) {
1272 		mdb_warn("failed to read fmd_xprt at %p", addr);
1273 		return (WALK_ERR);
1274 	}
1275 
1276 	wsp->walk_addr = (uintptr_t)xi.xi_list.l_next;
1277 	return (wsp->walk_callback(addr, &xi, wsp->walk_cbdata));
1278 }
1279 
1280 static int
1281 xpc_walk_init(mdb_walk_state_t *wsp)
1282 {
1283 	fmd_xprt_class_hash_t xch;
1284 
1285 	if (mdb_vread(&xch, sizeof (xch), wsp->walk_addr) != sizeof (xch)) {
1286 		mdb_warn("failed to read fmd_xprt_class_hash at %p",
1287 		    wsp->walk_addr);
1288 		return (WALK_ERR);
1289 	}
1290 
1291 	return (hash_walk_init(wsp, (uintptr_t)xch.xch_hash, xch.xch_hashlen,
1292 	    "fmd_xprt_class", sizeof (fmd_xprt_class_t),
1293 	    OFFSETOF(fmd_xprt_class_t, xc_next)));
1294 }
1295 
1296 /*ARGSUSED*/
1297 static int
1298 fmd_xprt_class(uintptr_t addr, const void *data, void *arg)
1299 {
1300 	const fmd_xprt_class_t *xcp = data;
1301 	char name[1024];
1302 
1303 	if (mdb_readstr(name, sizeof (name), (uintptr_t)xcp->xc_class) <= 0)
1304 		(void) mdb_snprintf(name, sizeof (name), "<%p>", xcp->xc_class);
1305 
1306 	mdb_printf("%-8p %-4u %s\n", addr, xcp->xc_refs, name);
1307 	return (WALK_NEXT);
1308 }
1309 
1310 static int
1311 fmd_xprt(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1312 {
1313 	uint_t opt_s = FALSE, opt_l = FALSE, opt_r = FALSE, opt_u = FALSE;
1314 	fmd_xprt_impl_t xi;
1315 
1316 	if (mdb_getopts(argc, argv,
1317 	    'l', MDB_OPT_SETBITS, TRUE, &opt_l,
1318 	    'r', MDB_OPT_SETBITS, TRUE, &opt_r,
1319 	    's', MDB_OPT_SETBITS, TRUE, &opt_s,
1320 	    'u', MDB_OPT_SETBITS, TRUE, &opt_u, NULL) != argc)
1321 		return (DCMD_USAGE);
1322 
1323 	if (!(flags & DCMD_ADDRSPEC)) {
1324 		if (mdb_walk_dcmd("fmd_xprt", "fmd_xprt", argc, argv) != 0) {
1325 			mdb_warn("failed to walk fmd_xprt");
1326 			return (DCMD_ERR);
1327 		}
1328 		return (DCMD_OK);
1329 	}
1330 
1331 	if (mdb_vread(&xi, sizeof (xi), addr) != sizeof (xi)) {
1332 		mdb_warn("failed to read fmd_xprt at %p", addr);
1333 		return (DCMD_ERR);
1334 	}
1335 
1336 	if (DCMD_HDRSPEC(flags)) {
1337 		mdb_printf("%<u>%-8s %-4s %-4s %-5s %s%</u>\n",
1338 		    "ADDR", "ID", "VERS", "FLAGS", "STATE");
1339 	}
1340 
1341 	mdb_printf("%-8p %-4d %-4u %-5x %a\n",
1342 	    addr, xi.xi_id, xi.xi_version, xi.xi_flags, xi.xi_state);
1343 
1344 	if (opt_l | opt_s) {
1345 		(void) mdb_inc_indent(4);
1346 		mdb_printf("Local subscriptions requested by peer:\n");
1347 		mdb_printf("%<u>%-8s %-4s %s%</u>\n", "ADDR", "REFS", "CLASS");
1348 		(void) mdb_pwalk("fmd_xprt_class", fmd_xprt_class, &xi,
1349 		    addr + OFFSETOF(fmd_xprt_impl_t, xi_lsub));
1350 		(void) mdb_dec_indent(4);
1351 	}
1352 
1353 	if (opt_r | opt_s) {
1354 		(void) mdb_inc_indent(4);
1355 		mdb_printf("Remote subscriptions requested of peer:\n");
1356 		mdb_printf("%<u>%-8s %-4s %s%</u>\n", "ADDR", "REFS", "CLASS");
1357 		(void) mdb_pwalk("fmd_xprt_class", fmd_xprt_class, &xi,
1358 		    addr + OFFSETOF(fmd_xprt_impl_t, xi_rsub));
1359 		(void) mdb_dec_indent(4);
1360 	}
1361 
1362 	if (opt_u | opt_s) {
1363 		(void) mdb_inc_indent(4);
1364 		mdb_printf("Pending unsubscription acknowledgements:\n");
1365 		mdb_printf("%<u>%-8s %-4s %s%</u>\n", "ADDR", "REFS", "CLASS");
1366 		(void) mdb_pwalk("fmd_xprt_class", fmd_xprt_class, &xi,
1367 		    addr + OFFSETOF(fmd_xprt_impl_t, xi_usub));
1368 		(void) mdb_dec_indent(4);
1369 	}
1370 
1371 	return (DCMD_OK);
1372 }
1373 
1374 static const mdb_dcmd_t dcmds[] = {
1375 	{ "fcf_case", "?", "print a FCF case", fcf_case },
1376 	{ "fcf_event", "?", "print a FCF event", fcf_event },
1377 	{ "fcf_hdr", "?", "print a FCF header", fcf_hdr },
1378 	{ "fcf_sec", ":", "print a FCF section header", fcf_sec },
1379 	{ "fcf_serd", "?", "print a FCF serd engine", fcf_serd },
1380 	{ "fmd_trace", "?[-cs]", "display thread trace buffer(s)", fmd_trace },
1381 	{ "fmd_ustat", ":", "display statistics collection", fmd_ustat },
1382 	{ "fmd_stat", ":", "display statistic structure", fmd_stat },
1383 	{ "fmd_event", NULL, "display event structure", fmd_event },
1384 	{ "fmd_thread", "?", "display thread or list of threads", fmd_thread },
1385 	{ "fmd_module", "?", "display module or list of modules", fmd_module },
1386 	{ "fmd_case", ":", "display case file structure", fmd_case },
1387 	{ "fmd_buf", ":", "display buffer structure", fmd_buf },
1388 	{ "fmd_serd", ":", "display serd engine structure", fmd_serd },
1389 	{ "fmd_asru", "?", "display asru resource structure", fmd_asru },
1390 	{ "fmd_timer", "?", "display pending timer(s)", fmd_timer },
1391 	{ "fmd_xprt", "?[-lrsu]", "display event transport(s)", fmd_xprt },
1392 	{ NULL }
1393 };
1394 
1395 static const mdb_walker_t walkers[] = {
1396 	{ "fcf_sec", "walk FCF section header table given header address",
1397 		fcf_sec_walk_init, fcf_sec_walk_step, fcf_sec_walk_fini },
1398 	{ "fmd_trace", "walk per-thread trace buffers",
1399 		trwalk_init, trwalk_step, trwalk_fini },
1400 	{ "fmd_ustat", "walk per-collection statistics",
1401 		ustat_walk_init, ustat_walk_step, hash_walk_fini },
1402 	{ "fmd_thread", "walk list of all fmd_thread_t's",
1403 		thread_walk_init, thread_walk_step, NULL },
1404 	{ "fmd_module", "walk list of all fmd_module_t's",
1405 		mod_walk_init, mod_walk_step, NULL },
1406 	{ "fmd_case", "walk per-module case objects",
1407 		case_walk_init, case_walk_step, case_walk_fini },
1408 	{ "fmd_buf", "walk per-buf_hash buffers",
1409 		buf_walk_init, hash_walk_step, hash_walk_fini },
1410 	{ "fmd_serd", "walk per-serd_hash engines",
1411 		serd_walk_init, hash_walk_step, hash_walk_fini },
1412 	{ "fmd_asru", "walk asru resource hash",
1413 		asru_walk_init, hash_walk_step, hash_walk_fini },
1414 	{ "fmd_timerq", "walk timer queue",
1415 		tmq_walk_init, tmq_walk_step, NULL },
1416 	{ "fmd_xprt", "walk per-module list of transports",
1417 		xprt_walk_init, xprt_walk_step, NULL },
1418 	{ "fmd_xprt_class", "walk hash table of subscription classes",
1419 		xpc_walk_init, hash_walk_step, hash_walk_fini },
1420 	{ NULL, NULL, NULL, NULL, NULL }
1421 };
1422 
1423 static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers };
1424 
1425 const mdb_modinfo_t *
1426 _mdb_init(void)
1427 {
1428 	return (&modinfo);
1429 }
1430