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--- old/usr/src/cmd/mdb/common/modules/zfs/zfs.c
+++ new/usr/src/cmd/mdb/common/modules/zfs/zfs.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 23 * Use is subject to license terms.
24 24 */
25 25
26 26 #include <mdb/mdb_ctf.h>
27 27 #include <sys/zfs_context.h>
28 28 #include <sys/mdb_modapi.h>
29 29 #include <sys/dbuf.h>
30 30 #include <sys/dmu_objset.h>
31 31 #include <sys/dsl_dir.h>
32 32 #include <sys/dsl_pool.h>
33 33 #include <sys/metaslab_impl.h>
34 34 #include <sys/space_map.h>
35 35 #include <sys/list.h>
36 36 #include <sys/spa_impl.h>
37 37 #include <sys/vdev_impl.h>
38 38 #include <sys/zio_compress.h>
39 39
40 40 #ifndef _KERNEL
41 41 #include "../genunix/list.h"
42 42 #endif
43 43
44 44 #ifdef _KERNEL
45 45 #define ZFS_OBJ_NAME "zfs"
46 46 #else
47 47 #define ZFS_OBJ_NAME "libzpool.so.1"
48 48 #endif
49 49
50 50 static char *
51 51 local_strdup(const char *s)
52 52 {
53 53 char *s1 = mdb_alloc(strlen(s) + 1, UM_SLEEP);
54 54
55 55 (void) strcpy(s1, s);
56 56 return (s1);
57 57 }
58 58
59 59 static int
60 60 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp,
61 61 const char *member, int len, void *buf)
62 62 {
63 63 mdb_ctf_id_t id;
64 64 ulong_t off;
65 65 char name[64];
66 66
67 67 if (idp == NULL) {
68 68 if (mdb_ctf_lookup_by_name(type, &id) == -1) {
69 69 mdb_warn("couldn't find type %s", type);
70 70 return (DCMD_ERR);
71 71 }
72 72 idp = &id;
73 73 } else {
74 74 type = name;
75 75 mdb_ctf_type_name(*idp, name, sizeof (name));
76 76 }
77 77
78 78 if (mdb_ctf_offsetof(*idp, member, &off) == -1) {
79 79 mdb_warn("couldn't find member %s of type %s\n", member, type);
80 80 return (DCMD_ERR);
81 81 }
82 82 if (off % 8 != 0) {
83 83 mdb_warn("member %s of type %s is unsupported bitfield",
84 84 member, type);
85 85 return (DCMD_ERR);
86 86 }
87 87 off /= 8;
88 88
89 89 if (mdb_vread(buf, len, addr + off) == -1) {
90 90 mdb_warn("failed to read %s from %s at %p",
91 91 member, type, addr + off);
92 92 return (DCMD_ERR);
93 93 }
94 94 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */
95 95
96 96 return (0);
97 97 }
98 98
99 99 #define GETMEMB(addr, type, member, dest) \
100 100 getmember(addr, #type, NULL, #member, sizeof (dest), &(dest))
101 101
102 102 #define GETMEMBID(addr, ctfid, member, dest) \
103 103 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest))
104 104
105 105 static int
106 106 getrefcount(uintptr_t addr, mdb_ctf_id_t *id,
107 107 const char *member, uint64_t *rc)
108 108 {
109 109 static int gotid;
110 110 static mdb_ctf_id_t rc_id;
111 111 ulong_t off;
112 112
113 113 if (!gotid) {
114 114 if (mdb_ctf_lookup_by_name("struct refcount", &rc_id) == -1) {
115 115 mdb_warn("couldn't find struct refcount");
116 116 return (DCMD_ERR);
117 117 }
118 118 gotid = TRUE;
119 119 }
120 120
121 121 if (mdb_ctf_offsetof(*id, member, &off) == -1) {
122 122 char name[64];
123 123 mdb_ctf_type_name(*id, name, sizeof (name));
124 124 mdb_warn("couldn't find member %s of type %s\n", member, name);
125 125 return (DCMD_ERR);
126 126 }
127 127 off /= 8;
128 128
129 129 return (GETMEMBID(addr + off, &rc_id, rc_count, *rc));
130 130 }
131 131
132 132 static int
133 133 read_symbol(char *sym_name, void **bufp)
134 134 {
135 135 GElf_Sym sym;
136 136
137 137 if (mdb_lookup_by_obj(MDB_TGT_OBJ_EVERY, sym_name, &sym)) {
138 138 mdb_warn("can't find symbol %s", sym_name);
139 139 return (DCMD_ERR);
140 140 }
141 141
142 142 *bufp = mdb_alloc(sym.st_size, UM_SLEEP);
143 143
144 144 if (mdb_vread(*bufp, sym.st_size, sym.st_value) == -1) {
145 145 mdb_warn("can't read data for symbol %s", sym_name);
146 146 mdb_free(*bufp, sym.st_size);
147 147 return (DCMD_ERR);
148 148 }
149 149
150 150 return (DCMD_OK);
151 151 }
152 152
153 153 static int verbose;
154 154
155 155 static int
156 156 freelist_walk_init(mdb_walk_state_t *wsp)
157 157 {
158 158 if (wsp->walk_addr == NULL) {
159 159 mdb_warn("must supply starting address\n");
160 160 return (WALK_ERR);
161 161 }
162 162
163 163 wsp->walk_data = 0; /* Index into the freelist */
164 164 return (WALK_NEXT);
165 165 }
166 166
167 167 static int
168 168 freelist_walk_step(mdb_walk_state_t *wsp)
169 169 {
170 170 uint64_t entry;
171 171 uintptr_t number = (uintptr_t)wsp->walk_data;
172 172 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
173 173 "INVALID", "INVALID", "INVALID", "INVALID" };
174 174 int mapshift = SPA_MINBLOCKSHIFT;
175 175
176 176 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) {
177 177 mdb_warn("failed to read freelist entry %p", wsp->walk_addr);
178 178 return (WALK_DONE);
179 179 }
180 180 wsp->walk_addr += sizeof (entry);
181 181 wsp->walk_data = (void *)(number + 1);
182 182
183 183 if (SM_DEBUG_DECODE(entry)) {
184 184 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n",
185 185 number,
186 186 ddata[SM_DEBUG_ACTION_DECODE(entry)],
187 187 SM_DEBUG_TXG_DECODE(entry),
188 188 SM_DEBUG_SYNCPASS_DECODE(entry));
189 189 } else {
190 190 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c "
191 191 "size=%06llx", number,
192 192 SM_OFFSET_DECODE(entry) << mapshift,
193 193 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) <<
194 194 mapshift,
195 195 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
196 196 SM_RUN_DECODE(entry) << mapshift);
197 197 if (verbose)
198 198 mdb_printf(" (raw=%012llx)\n", entry);
199 199 mdb_printf("\n");
200 200 }
201 201 return (WALK_NEXT);
202 202 }
203 203
204 204
205 205 static int
206 206 dataset_name(uintptr_t addr, char *buf)
207 207 {
208 208 static int gotid;
209 209 static mdb_ctf_id_t dd_id;
210 210 uintptr_t dd_parent;
211 211 char dd_myname[MAXNAMELEN];
212 212
213 213 if (!gotid) {
214 214 if (mdb_ctf_lookup_by_name("struct dsl_dir",
215 215 &dd_id) == -1) {
216 216 mdb_warn("couldn't find struct dsl_dir");
217 217 return (DCMD_ERR);
218 218 }
219 219 gotid = TRUE;
220 220 }
221 221 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) ||
222 222 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) {
223 223 return (DCMD_ERR);
224 224 }
225 225
226 226 if (dd_parent) {
227 227 if (dataset_name(dd_parent, buf))
228 228 return (DCMD_ERR);
229 229 strcat(buf, "/");
230 230 }
231 231
232 232 if (dd_myname[0])
233 233 strcat(buf, dd_myname);
234 234 else
235 235 strcat(buf, "???");
236 236
237 237 return (0);
238 238 }
239 239
240 240 static int
241 241 objset_name(uintptr_t addr, char *buf)
242 242 {
243 243 static int gotid;
244 244 static mdb_ctf_id_t osi_id, ds_id;
245 245 uintptr_t os_dsl_dataset;
246 246 char ds_snapname[MAXNAMELEN];
247 247 uintptr_t ds_dir;
248 248
249 249 buf[0] = '\0';
250 250
251 251 if (!gotid) {
252 252 if (mdb_ctf_lookup_by_name("struct objset_impl",
253 253 &osi_id) == -1) {
254 254 mdb_warn("couldn't find struct objset_impl");
255 255 return (DCMD_ERR);
256 256 }
257 257 if (mdb_ctf_lookup_by_name("struct dsl_dataset",
258 258 &ds_id) == -1) {
259 259 mdb_warn("couldn't find struct dsl_dataset");
260 260 return (DCMD_ERR);
261 261 }
262 262
263 263 gotid = TRUE;
264 264 }
265 265
266 266 if (GETMEMBID(addr, &osi_id, os_dsl_dataset, os_dsl_dataset))
267 267 return (DCMD_ERR);
268 268
269 269 if (os_dsl_dataset == 0) {
270 270 strcat(buf, "mos");
271 271 return (0);
272 272 }
273 273
274 274 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) ||
275 275 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) {
276 276 return (DCMD_ERR);
277 277 }
278 278
279 279 if (ds_dir && dataset_name(ds_dir, buf))
280 280 return (DCMD_ERR);
281 281
282 282 if (ds_snapname[0]) {
283 283 strcat(buf, "@");
284 284 strcat(buf, ds_snapname);
285 285 }
286 286 return (0);
287 287 }
288 288
289 289 static void
290 290 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val,
291 291 const char *prefix)
292 292 {
293 293 const char *cp;
294 294 size_t len = strlen(prefix);
295 295
296 296 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) {
297 297 if (strncmp(cp, prefix, len) == 0)
298 298 cp += len;
299 299 (void) strncpy(out, cp, size);
300 300 } else {
301 301 mdb_snprintf(out, size, "? (%d)", val);
302 302 }
303 303 }
304 304
305 305 /* ARGSUSED */
306 306 static int
307 307 zio_pipeline(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
308 308 {
309 309 mdb_ctf_id_t pipe_enum;
310 310 int i;
311 311 char stage[1024];
312 312
313 313 if (mdb_ctf_lookup_by_name("enum zio_stage", &pipe_enum) == -1) {
314 314 mdb_warn("Could not find enum zio_stage");
315 315 return (DCMD_ERR);
316 316 }
317 317
318 318 for (i = 0; i < 32; i++) {
319 319 if (addr & (1U << i)) {
320 320 enum_lookup(stage, sizeof (stage), pipe_enum, i,
321 321 "ZIO_STAGE_");
322 322 mdb_printf(" %s\n", stage);
323 323 }
324 324 }
325 325
326 326 return (DCMD_OK);
327 327 }
328 328
329 329 /* ARGSUSED */
330 330 static int
331 331 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
332 332 {
333 333 /*
334 334 * This table can be approximately generated by running:
335 335 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2
336 336 */
337 337 static const char *params[] = {
338 338 "arc_reduce_dnlc_percent",
339 339 "zfs_arc_max",
340 340 "zfs_arc_min",
341 341 "arc_shrink_shift",
342 342 "zfs_mdcomp_disable",
343 343 "zfs_prefetch_disable",
344 344 "zfetch_max_streams",
345 345 "zfetch_min_sec_reap",
346 346 "zfetch_block_cap",
347 347 "zfetch_array_rd_sz",
348 348 "zfs_default_bs",
349 349 "zfs_default_ibs",
350 350 "metaslab_aliquot",
351 351 "reference_tracking_enable",
352 352 "reference_history",
353 353 "zio_taskq_threads",
354 354 "spa_max_replication_override",
355 355 "spa_mode",
356 356 "zfs_flags",
357 357 "zfs_txg_synctime",
358 358 "zfs_txg_timeout",
359 359 "zfs_write_limit_min",
360 360 "zfs_write_limit_max",
361 361 "zfs_write_limit_shift",
362 362 "zfs_write_limit_override",
363 363 "zfs_no_write_throttle",
364 364 "zfs_vdev_cache_max",
365 365 "zfs_vdev_cache_size",
366 366 "zfs_vdev_cache_bshift",
367 367 "vdev_mirror_shift",
368 368 "zfs_vdev_max_pending",
369 369 "zfs_vdev_min_pending",
370 370 "zfs_scrub_limit",
371 371 "zfs_vdev_time_shift",
372 372 "zfs_vdev_ramp_rate",
373 373 "zfs_vdev_aggregation_limit",
374 374 "fzap_default_block_shift",
375 375 "zfs_immediate_write_sz",
376 376 "zfs_read_chunk_size",
377 377 "zil_disable",
378 378 "zfs_nocacheflush",
379 379 "metaslab_gang_bang",
380 380 "zio_injection_enabled",
381 381 "zvol_immediate_write_sz",
382 382 };
383 383 int i;
384 384
385 385 for (i = 0; i < sizeof (params) / sizeof (params[0]); i++) {
386 386 int sz;
387 387 uint64_t val64;
388 388 uint32_t *val32p = (uint32_t *)&val64;
389 389
390 390 sz = mdb_readvar(&val64, params[i]);
391 391 if (sz == 4) {
392 392 mdb_printf("%s = 0x%x\n", params[i], *val32p);
393 393 } else if (sz == 8) {
394 394 mdb_printf("%s = 0x%llx\n", params[i], val64);
395 395 } else {
396 396 mdb_warn("variable %s not found", params[i]);
397 397 }
398 398 }
399 399
400 400 return (DCMD_OK);
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401 401 }
402 402
403 403 /* ARGSUSED */
404 404 static int
405 405 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
406 406 {
407 407 blkptr_t bp;
408 408 dmu_object_type_info_t *doti;
409 409 zio_compress_info_t *zct;
410 410 zio_checksum_info_t *zci;
411 + zio_crypt_info_t *zcc;
411 412 int i;
412 413 char buf[MAXPATHLEN];
413 414
414 415 if (mdb_vread(&bp, sizeof (blkptr_t), addr) == -1) {
415 416 mdb_warn("failed to read blkptr_t");
416 417 return (DCMD_ERR);
417 418 }
418 419
419 420 if (read_symbol("dmu_ot", (void **)&doti) != DCMD_OK)
420 421 return (DCMD_ERR);
421 422 for (i = 0; i < DMU_OT_NUMTYPES; i++) {
422 423 mdb_readstr(buf, sizeof (buf), (uintptr_t)doti[i].ot_name);
423 424 doti[i].ot_name = local_strdup(buf);
424 425 }
425 426
426 427 if (read_symbol("zio_checksum_table", (void **)&zci) != DCMD_OK)
427 428 return (DCMD_ERR);
428 429 for (i = 0; i < ZIO_CHECKSUM_FUNCTIONS; i++) {
429 430 mdb_readstr(buf, sizeof (buf), (uintptr_t)zci[i].ci_name);
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430 431 zci[i].ci_name = local_strdup(buf);
431 432 }
432 433
433 434 if (read_symbol("zio_compress_table", (void **)&zct) != DCMD_OK)
434 435 return (DCMD_ERR);
435 436 for (i = 0; i < ZIO_COMPRESS_FUNCTIONS; i++) {
436 437 mdb_readstr(buf, sizeof (buf), (uintptr_t)zct[i].ci_name);
437 438 zct[i].ci_name = local_strdup(buf);
438 439 }
439 440
441 + if (read_symbol("zio_crypt_table", (void **)&zcc) != DCMD_OK)
442 + return (DCMD_ERR);
443 + for (i = 0; i < ZIO_CRYPT_FUNCTIONS; i++) {
444 + mdb_readstr(buf, sizeof (buf), (uintptr_t)zcc[i].ci_name);
445 + zcc[i].ci_name = local_strdup(buf);
446 + }
447 +
440 448 /*
441 449 * Super-ick warning: This code is also duplicated in
442 450 * cmd/zdb.c . Yeah, I hate code replication, too.
443 451 */
444 452 for (i = 0; i < BP_GET_NDVAS(&bp); i++) {
445 453 dva_t *dva = &bp.blk_dva[i];
446 454
447 455 mdb_printf("DVA[%d]: vdev_id %lld / %llx\n", i,
448 456 DVA_GET_VDEV(dva), DVA_GET_OFFSET(dva));
449 457 mdb_printf("DVA[%d]: GANG: %-5s GRID: %04x\t"
450 458 "ASIZE: %llx\n", i, DVA_GET_GANG(dva) ? "TRUE" : "FALSE",
451 459 DVA_GET_GRID(dva), DVA_GET_ASIZE(dva));
452 460 mdb_printf("DVA[%d]: :%llu:%llx:%llx:%s%s%s%s\n", i,
453 461 DVA_GET_VDEV(dva), DVA_GET_OFFSET(dva), BP_GET_PSIZE(&bp),
454 462 BP_SHOULD_BYTESWAP(&bp) ? "e" : "",
455 463 !DVA_GET_GANG(dva) && BP_GET_LEVEL(&bp) != 0 ? "i" : "",
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456 464 DVA_GET_GANG(dva) ? "g" : "",
457 465 BP_GET_COMPRESS(&bp) != 0 ? "d" : "");
458 466 }
459 467 mdb_printf("LSIZE: %-16llx\t\tPSIZE: %llx\n",
460 468 BP_GET_LSIZE(&bp), BP_GET_PSIZE(&bp));
461 469 mdb_printf("ENDIAN: %6s\t\t\t\t\tTYPE: %s\n",
462 470 BP_GET_BYTEORDER(&bp) ? "LITTLE" : "BIG",
463 471 doti[BP_GET_TYPE(&bp)].ot_name);
464 472 mdb_printf("BIRTH: %-16llx LEVEL: %-2d\tFILL: %llx\n",
465 473 bp.blk_birth, BP_GET_LEVEL(&bp), bp.blk_fill);
466 - mdb_printf("CKFUNC: %-16s\t\tCOMP: %s\n",
474 + mdb_printf("CKFUNC: %-16s\tCOMP: %s\tCRYPT: %s\n",
467 475 zci[BP_GET_CHECKSUM(&bp)].ci_name,
468 - zct[BP_GET_COMPRESS(&bp)].ci_name);
476 + zct[BP_GET_COMPRESS(&bp)].ci_name,
477 + zcc[BP_GET_CRYPT(&bp)].ci_name);
469 478 mdb_printf("CKSUM: %llx:%llx:%llx:%llx\n",
470 479 bp.blk_cksum.zc_word[0],
471 480 bp.blk_cksum.zc_word[1],
472 481 bp.blk_cksum.zc_word[2],
473 482 bp.blk_cksum.zc_word[3]);
474 483
475 484 return (DCMD_OK);
476 485 }
477 486
478 487 /* ARGSUSED */
479 488 static int
480 489 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
481 490 {
482 491 mdb_ctf_id_t id;
483 492 dmu_buf_t db;
484 493 uintptr_t objset;
485 494 uint8_t level;
486 495 uint64_t blkid;
487 496 uint64_t holds;
488 497 char objectname[32];
489 498 char blkidname[32];
490 499 char path[MAXNAMELEN];
491 500
492 501 if (DCMD_HDRSPEC(flags)) {
493 502 mdb_printf(" addr object lvl blkid holds os\n");
494 503 }
495 504
496 505 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &id) == -1) {
497 506 mdb_warn("couldn't find struct dmu_buf_impl_t");
498 507 return (DCMD_ERR);
499 508 }
500 509
501 510 if (GETMEMBID(addr, &id, db_objset, objset) ||
502 511 GETMEMBID(addr, &id, db, db) ||
503 512 GETMEMBID(addr, &id, db_level, level) ||
504 513 GETMEMBID(addr, &id, db_blkid, blkid)) {
505 514 return (WALK_ERR);
506 515 }
507 516
508 517 if (getrefcount(addr, &id, "db_holds", &holds)) {
509 518 return (WALK_ERR);
510 519 }
511 520
512 521 if (db.db_object == DMU_META_DNODE_OBJECT)
513 522 (void) strcpy(objectname, "mdn");
514 523 else
515 524 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx",
516 525 (u_longlong_t)db.db_object);
517 526
518 527 if (blkid == DB_BONUS_BLKID)
519 528 (void) strcpy(blkidname, "bonus");
520 529 else
521 530 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx",
522 531 (u_longlong_t)blkid);
523 532
524 533 if (objset_name(objset, path)) {
525 534 return (WALK_ERR);
526 535 }
527 536
528 537 mdb_printf("%p %8s %1u %9s %2llu %s\n",
529 538 addr, objectname, level, blkidname, holds, path);
530 539
531 540 return (DCMD_OK);
532 541 }
533 542
534 543 /* ARGSUSED */
535 544 static int
536 545 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
537 546 {
538 547 #define HISTOSZ 32
539 548 uintptr_t dbp;
540 549 dmu_buf_impl_t db;
541 550 dbuf_hash_table_t ht;
542 551 uint64_t bucket, ndbufs;
543 552 uint64_t histo[HISTOSZ];
544 553 uint64_t histo2[HISTOSZ];
545 554 int i, maxidx;
546 555
547 556 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) {
548 557 mdb_warn("failed to read 'dbuf_hash_table'");
549 558 return (DCMD_ERR);
550 559 }
551 560
552 561 for (i = 0; i < HISTOSZ; i++) {
553 562 histo[i] = 0;
554 563 histo2[i] = 0;
555 564 }
556 565
557 566 ndbufs = 0;
558 567 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) {
559 568 int len;
560 569
561 570 if (mdb_vread(&dbp, sizeof (void *),
562 571 (uintptr_t)(ht.hash_table+bucket)) == -1) {
563 572 mdb_warn("failed to read hash bucket %u at %p",
564 573 bucket, ht.hash_table+bucket);
565 574 return (DCMD_ERR);
566 575 }
567 576
568 577 len = 0;
569 578 while (dbp != 0) {
570 579 if (mdb_vread(&db, sizeof (dmu_buf_impl_t),
571 580 dbp) == -1) {
572 581 mdb_warn("failed to read dbuf at %p", dbp);
573 582 return (DCMD_ERR);
574 583 }
575 584 dbp = (uintptr_t)db.db_hash_next;
576 585 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--)
577 586 histo2[i]++;
578 587 len++;
579 588 ndbufs++;
580 589 }
581 590
582 591 if (len >= HISTOSZ)
583 592 len = HISTOSZ-1;
584 593 histo[len]++;
585 594 }
586 595
587 596 mdb_printf("hash table has %llu buckets, %llu dbufs "
588 597 "(avg %llu buckets/dbuf)\n",
589 598 ht.hash_table_mask+1, ndbufs,
590 599 (ht.hash_table_mask+1)/ndbufs);
591 600
592 601 mdb_printf("\n");
593 602 maxidx = 0;
594 603 for (i = 0; i < HISTOSZ; i++)
595 604 if (histo[i] > 0)
596 605 maxidx = i;
597 606 mdb_printf("hash chain length number of buckets\n");
598 607 for (i = 0; i <= maxidx; i++)
599 608 mdb_printf("%u %llu\n", i, histo[i]);
600 609
601 610 mdb_printf("\n");
602 611 maxidx = 0;
603 612 for (i = 0; i < HISTOSZ; i++)
604 613 if (histo2[i] > 0)
605 614 maxidx = i;
606 615 mdb_printf("hash chain depth number of dbufs\n");
607 616 for (i = 0; i <= maxidx; i++)
608 617 mdb_printf("%u or more %llu %llu%%\n",
609 618 i, histo2[i], histo2[i]*100/ndbufs);
610 619
611 620
612 621 return (DCMD_OK);
613 622 }
614 623
615 624 typedef struct dbufs_data {
616 625 mdb_ctf_id_t id;
617 626 uint64_t objset;
618 627 uint64_t object;
619 628 uint64_t level;
620 629 uint64_t blkid;
621 630 char *osname;
622 631 } dbufs_data_t;
623 632
624 633 #define DBUFS_UNSET (0xbaddcafedeadbeefULL)
625 634
626 635 /* ARGSUSED */
627 636 static int
628 637 dbufs_cb(uintptr_t addr, const void *unknown, void *arg)
629 638 {
630 639 dbufs_data_t *data = arg;
631 640 uintptr_t objset;
632 641 dmu_buf_t db;
633 642 uint8_t level;
634 643 uint64_t blkid;
635 644 char osname[MAXNAMELEN];
636 645
637 646 if (GETMEMBID(addr, &data->id, db_objset, objset) ||
638 647 GETMEMBID(addr, &data->id, db, db) ||
639 648 GETMEMBID(addr, &data->id, db_level, level) ||
640 649 GETMEMBID(addr, &data->id, db_blkid, blkid)) {
641 650 return (WALK_ERR);
642 651 }
643 652
644 653 if ((data->objset == DBUFS_UNSET || data->objset == objset) &&
645 654 (data->osname == NULL || (objset_name(objset, osname) == 0 &&
646 655 strcmp(data->osname, osname) == 0)) &&
647 656 (data->object == DBUFS_UNSET || data->object == db.db_object) &&
648 657 (data->level == DBUFS_UNSET || data->level == level) &&
649 658 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) {
650 659 mdb_printf("%#lr\n", addr);
651 660 }
652 661 return (WALK_NEXT);
653 662 }
654 663
655 664 /* ARGSUSED */
656 665 static int
657 666 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
658 667 {
659 668 dbufs_data_t data;
660 669 char *object = NULL;
661 670 char *blkid = NULL;
662 671
663 672 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET;
664 673 data.osname = NULL;
665 674
666 675 if (mdb_getopts(argc, argv,
667 676 'O', MDB_OPT_UINT64, &data.objset,
668 677 'n', MDB_OPT_STR, &data.osname,
669 678 'o', MDB_OPT_STR, &object,
670 679 'l', MDB_OPT_UINT64, &data.level,
671 680 'b', MDB_OPT_STR, &blkid) != argc) {
672 681 return (DCMD_USAGE);
673 682 }
674 683
675 684 if (object) {
676 685 if (strcmp(object, "mdn") == 0) {
677 686 data.object = DMU_META_DNODE_OBJECT;
678 687 } else {
679 688 data.object = mdb_strtoull(object);
680 689 }
681 690 }
682 691
683 692 if (blkid) {
684 693 if (strcmp(blkid, "bonus") == 0) {
685 694 data.blkid = DB_BONUS_BLKID;
686 695 } else {
687 696 data.blkid = mdb_strtoull(blkid);
688 697 }
689 698 }
690 699
691 700 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &data.id) == -1) {
692 701 mdb_warn("couldn't find struct dmu_buf_impl_t");
693 702 return (DCMD_ERR);
694 703 }
695 704
696 705 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) {
697 706 mdb_warn("can't walk dbufs");
698 707 return (DCMD_ERR);
699 708 }
700 709
701 710 return (DCMD_OK);
702 711 }
703 712
704 713 typedef struct abuf_find_data {
705 714 dva_t dva;
706 715 mdb_ctf_id_t id;
707 716 } abuf_find_data_t;
708 717
709 718 /* ARGSUSED */
710 719 static int
711 720 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg)
712 721 {
713 722 abuf_find_data_t *data = arg;
714 723 dva_t dva;
715 724
716 725 if (GETMEMBID(addr, &data->id, b_dva, dva)) {
717 726 return (WALK_ERR);
718 727 }
719 728
720 729 if (dva.dva_word[0] == data->dva.dva_word[0] &&
721 730 dva.dva_word[1] == data->dva.dva_word[1]) {
722 731 mdb_printf("%#lr\n", addr);
723 732 }
724 733 return (WALK_NEXT);
725 734 }
726 735
727 736 /* ARGSUSED */
728 737 static int
729 738 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
730 739 {
731 740 abuf_find_data_t data;
732 741 GElf_Sym sym;
733 742 int i;
734 743 const char *syms[] = {
735 744 "ARC_mru",
736 745 "ARC_mru_ghost",
737 746 "ARC_mfu",
738 747 "ARC_mfu_ghost",
739 748 };
740 749
741 750 if (argc != 2)
742 751 return (DCMD_USAGE);
743 752
744 753 for (i = 0; i < 2; i ++) {
745 754 switch (argv[i].a_type) {
746 755 case MDB_TYPE_STRING:
747 756 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str);
748 757 break;
749 758 case MDB_TYPE_IMMEDIATE:
750 759 data.dva.dva_word[i] = argv[i].a_un.a_val;
751 760 break;
752 761 default:
753 762 return (DCMD_USAGE);
754 763 }
755 764 }
756 765
757 766 if (mdb_ctf_lookup_by_name("struct arc_buf_hdr", &data.id) == -1) {
758 767 mdb_warn("couldn't find struct arc_buf_hdr");
759 768 return (DCMD_ERR);
760 769 }
761 770
762 771 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) {
763 772 if (mdb_lookup_by_name(syms[i], &sym)) {
764 773 mdb_warn("can't find symbol %s", syms[i]);
765 774 return (DCMD_ERR);
766 775 }
767 776
768 777 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) {
769 778 mdb_warn("can't walk %s", syms[i]);
770 779 return (DCMD_ERR);
771 780 }
772 781 }
773 782
774 783 return (DCMD_OK);
775 784 }
776 785
777 786 /*ARGSUSED*/
778 787 static int
779 788 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
780 789 {
781 790 kstat_named_t *stats;
782 791 GElf_Sym sym;
783 792 int nstats, i;
784 793 uint_t opt_a = FALSE;
785 794 uint_t opt_b = FALSE;
786 795 uint_t shift = 0;
787 796 const char *suffix;
788 797
789 798 static const char *bytestats[] = {
790 799 "p", "c", "c_min", "c_max", "size", NULL
791 800 };
792 801
793 802 static const char *extras[] = {
794 803 "arc_no_grow", "arc_tempreserve",
795 804 "arc_meta_used", "arc_meta_limit", "arc_meta_max",
796 805 NULL
797 806 };
798 807
799 808 if (mdb_lookup_by_name("arc_stats", &sym) == -1) {
800 809 mdb_warn("failed to find 'arc_stats'");
801 810 return (DCMD_ERR);
802 811 }
803 812
804 813 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC);
805 814
806 815 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) {
807 816 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value);
808 817 return (DCMD_ERR);
809 818 }
810 819
811 820 nstats = sym.st_size / sizeof (kstat_named_t);
812 821
813 822 /* NB: -a / opt_a are ignored for backwards compatability */
814 823 if (mdb_getopts(argc, argv,
815 824 'a', MDB_OPT_SETBITS, TRUE, &opt_a,
816 825 'b', MDB_OPT_SETBITS, TRUE, &opt_b,
817 826 'k', MDB_OPT_SETBITS, 10, &shift,
818 827 'm', MDB_OPT_SETBITS, 20, &shift,
819 828 'g', MDB_OPT_SETBITS, 30, &shift,
820 829 NULL) != argc)
821 830 return (DCMD_USAGE);
822 831
823 832 if (!opt_b && !shift)
824 833 shift = 20;
825 834
826 835 switch (shift) {
827 836 case 0:
828 837 suffix = "B";
829 838 break;
830 839 case 10:
831 840 suffix = "KB";
832 841 break;
833 842 case 20:
834 843 suffix = "MB";
835 844 break;
836 845 case 30:
837 846 suffix = "GB";
838 847 break;
839 848 default:
840 849 suffix = "XX";
841 850 }
842 851
843 852 for (i = 0; i < nstats; i++) {
844 853 int j;
845 854 boolean_t bytes = B_FALSE;
846 855
847 856 for (j = 0; bytestats[j]; j++) {
848 857 if (strcmp(stats[i].name, bytestats[j]) == 0) {
849 858 bytes = B_TRUE;
850 859 break;
851 860 }
852 861 }
853 862
854 863 if (bytes) {
855 864 mdb_printf("%-25s = %9llu %s\n", stats[i].name,
856 865 stats[i].value.ui64 >> shift, suffix);
857 866 } else {
858 867 mdb_printf("%-25s = %9llu\n", stats[i].name,
859 868 stats[i].value.ui64);
860 869 }
861 870 }
862 871
863 872 for (i = 0; extras[i]; i++) {
864 873 uint64_t buf;
865 874
866 875 if (mdb_lookup_by_name(extras[i], &sym) == -1) {
867 876 mdb_warn("failed to find '%s'", extras[i]);
868 877 return (DCMD_ERR);
869 878 }
870 879
871 880 if (sym.st_size != sizeof (uint64_t) &&
872 881 sym.st_size != sizeof (uint32_t)) {
873 882 mdb_warn("expected scalar for variable '%s'\n",
874 883 extras[i]);
875 884 return (DCMD_ERR);
876 885 }
877 886
878 887 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) {
879 888 mdb_warn("couldn't read '%s'", extras[i]);
880 889 return (DCMD_ERR);
881 890 }
882 891
883 892 mdb_printf("%-25s = ", extras[i]);
884 893
885 894 /* NB: all the 64-bit extras happen to be byte counts */
886 895 if (sym.st_size == sizeof (uint64_t))
887 896 mdb_printf("%9llu %s\n", buf >> shift, suffix);
888 897
889 898 if (sym.st_size == sizeof (uint32_t))
890 899 mdb_printf("%9d\n", *((uint32_t *)&buf));
891 900 }
892 901 return (DCMD_OK);
893 902 }
894 903
895 904 /*
896 905 * ::spa
897 906 *
898 907 * -c Print configuration information as well
899 908 * -v Print vdev state
900 909 * -e Print vdev error stats
901 910 *
902 911 * Print a summarized spa_t. When given no arguments, prints out a table of all
903 912 * active pools on the system.
904 913 */
905 914 /* ARGSUSED */
906 915 static int
907 916 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
908 917 {
909 918 spa_t spa;
910 919 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED",
911 920 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" };
912 921 const char *state;
913 922 int config = FALSE;
914 923 int vdevs = FALSE;
915 924 int errors = FALSE;
916 925
917 926 if (mdb_getopts(argc, argv,
918 927 'c', MDB_OPT_SETBITS, TRUE, &config,
919 928 'v', MDB_OPT_SETBITS, TRUE, &vdevs,
920 929 'e', MDB_OPT_SETBITS, TRUE, &errors,
921 930 NULL) != argc)
922 931 return (DCMD_USAGE);
923 932
924 933 if (!(flags & DCMD_ADDRSPEC)) {
925 934 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) {
926 935 mdb_warn("can't walk spa");
927 936 return (DCMD_ERR);
928 937 }
929 938
930 939 return (DCMD_OK);
931 940 }
932 941
933 942 if (flags & DCMD_PIPE_OUT) {
934 943 mdb_printf("%#lr\n", addr);
935 944 return (DCMD_OK);
936 945 }
937 946
938 947 if (DCMD_HDRSPEC(flags))
939 948 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE",
940 949 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME");
941 950
942 951 if (mdb_vread(&spa, sizeof (spa), addr) == -1) {
943 952 mdb_warn("failed to read spa_t at %p", addr);
944 953 return (DCMD_ERR);
945 954 }
946 955
947 956 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL)
948 957 state = "UNKNOWN";
949 958 else
950 959 state = statetab[spa.spa_state];
951 960
952 961 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name);
953 962
954 963 if (config) {
955 964 mdb_printf("\n");
956 965 mdb_inc_indent(4);
957 966 if (mdb_call_dcmd("spa_config", addr, flags, 0,
958 967 NULL) != DCMD_OK)
959 968 return (DCMD_ERR);
960 969 mdb_dec_indent(4);
961 970 }
962 971
963 972 if (vdevs || errors) {
964 973 mdb_arg_t v;
965 974
966 975 v.a_type = MDB_TYPE_STRING;
967 976 v.a_un.a_str = "-e";
968 977
969 978 mdb_printf("\n");
970 979 mdb_inc_indent(4);
971 980 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0,
972 981 &v) != DCMD_OK)
973 982 return (DCMD_ERR);
974 983 mdb_dec_indent(4);
975 984 }
976 985
977 986 return (DCMD_OK);
978 987 }
979 988
980 989 /*
981 990 * ::spa_config
982 991 *
983 992 * Given a spa_t, print the configuration information stored in spa_config.
984 993 * Since it's just an nvlist, format it as an indented list of name=value pairs.
985 994 * We simply read the value of spa_config and pass off to ::nvlist.
986 995 */
987 996 /* ARGSUSED */
988 997 static int
989 998 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
990 999 {
991 1000 spa_t spa;
992 1001
993 1002 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
994 1003 return (DCMD_USAGE);
995 1004
996 1005 if (mdb_vread(&spa, sizeof (spa), addr) == -1) {
997 1006 mdb_warn("failed to read spa_t at %p", addr);
998 1007 return (DCMD_ERR);
999 1008 }
1000 1009
1001 1010 if (spa.spa_config == NULL) {
1002 1011 mdb_printf("(none)\n");
1003 1012 return (DCMD_OK);
1004 1013 }
1005 1014
1006 1015 return (mdb_call_dcmd("nvlist", (uintptr_t)spa.spa_config, flags,
1007 1016 0, NULL));
1008 1017 }
1009 1018
1010 1019 /*
1011 1020 * ::vdev
1012 1021 *
1013 1022 * Print out a summarized vdev_t, in the following form:
1014 1023 *
1015 1024 * ADDR STATE AUX DESC
1016 1025 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0
1017 1026 *
1018 1027 * If '-r' is specified, recursively visit all children.
1019 1028 *
1020 1029 * With '-e', the statistics associated with the vdev are printed as well.
1021 1030 */
1022 1031 static int
1023 1032 do_print_vdev(uintptr_t addr, int flags, int depth, int stats,
1024 1033 int recursive)
1025 1034 {
1026 1035 vdev_t vdev;
1027 1036 char desc[MAXNAMELEN];
1028 1037 int c, children;
1029 1038 uintptr_t *child;
1030 1039 const char *state, *aux;
1031 1040
1032 1041 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) {
1033 1042 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr);
1034 1043 return (DCMD_ERR);
1035 1044 }
1036 1045
1037 1046 if (flags & DCMD_PIPE_OUT) {
1038 1047 mdb_printf("%#lr", addr);
1039 1048 } else {
1040 1049 if (vdev.vdev_path != NULL) {
1041 1050 if (mdb_readstr(desc, sizeof (desc),
1042 1051 (uintptr_t)vdev.vdev_path) == -1) {
1043 1052 mdb_warn("failed to read vdev_path at %p\n",
1044 1053 vdev.vdev_path);
1045 1054 return (DCMD_ERR);
1046 1055 }
1047 1056 } else if (vdev.vdev_ops != NULL) {
1048 1057 vdev_ops_t ops;
1049 1058 if (mdb_vread(&ops, sizeof (ops),
1050 1059 (uintptr_t)vdev.vdev_ops) == -1) {
1051 1060 mdb_warn("failed to read vdev_ops at %p\n",
1052 1061 vdev.vdev_ops);
1053 1062 return (DCMD_ERR);
1054 1063 }
1055 1064 (void) strcpy(desc, ops.vdev_op_type);
1056 1065 } else {
1057 1066 (void) strcpy(desc, "<unknown>");
1058 1067 }
1059 1068
1060 1069 if (depth == 0 && DCMD_HDRSPEC(flags))
1061 1070 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n",
1062 1071 "ADDR", "STATE", "AUX",
1063 1072 sizeof (uintptr_t) == 4 ? 43 : 35,
1064 1073 "DESCRIPTION");
1065 1074
1066 1075 mdb_printf("%0?p ", addr);
1067 1076
1068 1077 switch (vdev.vdev_state) {
1069 1078 case VDEV_STATE_CLOSED:
1070 1079 state = "CLOSED";
1071 1080 break;
1072 1081 case VDEV_STATE_OFFLINE:
1073 1082 state = "OFFLINE";
1074 1083 break;
1075 1084 case VDEV_STATE_CANT_OPEN:
1076 1085 state = "CANT_OPEN";
1077 1086 break;
1078 1087 case VDEV_STATE_DEGRADED:
1079 1088 state = "DEGRADED";
1080 1089 break;
1081 1090 case VDEV_STATE_HEALTHY:
1082 1091 state = "HEALTHY";
1083 1092 break;
1084 1093 case VDEV_STATE_REMOVED:
1085 1094 state = "REMOVED";
1086 1095 break;
1087 1096 case VDEV_STATE_FAULTED:
1088 1097 state = "FAULTED";
1089 1098 break;
1090 1099 default:
1091 1100 state = "UNKNOWN";
1092 1101 break;
1093 1102 }
1094 1103
1095 1104 switch (vdev.vdev_stat.vs_aux) {
1096 1105 case VDEV_AUX_NONE:
1097 1106 aux = "-";
1098 1107 break;
1099 1108 case VDEV_AUX_OPEN_FAILED:
1100 1109 aux = "OPEN_FAILED";
1101 1110 break;
1102 1111 case VDEV_AUX_CORRUPT_DATA:
1103 1112 aux = "CORRUPT_DATA";
1104 1113 break;
1105 1114 case VDEV_AUX_NO_REPLICAS:
1106 1115 aux = "NO_REPLICAS";
1107 1116 break;
1108 1117 case VDEV_AUX_BAD_GUID_SUM:
1109 1118 aux = "BAD_GUID_SUM";
1110 1119 break;
1111 1120 case VDEV_AUX_TOO_SMALL:
1112 1121 aux = "TOO_SMALL";
1113 1122 break;
1114 1123 case VDEV_AUX_BAD_LABEL:
1115 1124 aux = "BAD_LABEL";
1116 1125 break;
1117 1126 case VDEV_AUX_VERSION_NEWER:
1118 1127 aux = "VERS_NEWER";
1119 1128 break;
1120 1129 case VDEV_AUX_VERSION_OLDER:
1121 1130 aux = "VERS_OLDER";
1122 1131 break;
1123 1132 case VDEV_AUX_SPARED:
1124 1133 aux = "SPARED";
1125 1134 break;
1126 1135 case VDEV_AUX_ERR_EXCEEDED:
1127 1136 aux = "ERR_EXCEEDED";
1128 1137 break;
1129 1138 case VDEV_AUX_IO_FAILURE:
1130 1139 aux = "IO_FAILURE";
1131 1140 break;
1132 1141 case VDEV_AUX_BAD_LOG:
1133 1142 aux = "BAD_LOG";
1134 1143 break;
1135 1144 default:
1136 1145 aux = "UNKNOWN";
1137 1146 break;
1138 1147 }
1139 1148
1140 1149 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc);
1141 1150
1142 1151 if (stats) {
1143 1152 vdev_stat_t *vs = &vdev.vdev_stat;
1144 1153 int i;
1145 1154
1146 1155 mdb_inc_indent(4);
1147 1156 mdb_printf("\n");
1148 1157 mdb_printf("%<u> %12s %12s %12s %12s "
1149 1158 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM",
1150 1159 "IOCTL");
1151 1160 mdb_printf("OPS ");
1152 1161 for (i = 1; i < ZIO_TYPES; i++)
1153 1162 mdb_printf("%11#llx%s", vs->vs_ops[i],
1154 1163 i == ZIO_TYPES - 1 ? "" : " ");
1155 1164 mdb_printf("\n");
1156 1165 mdb_printf("BYTES ");
1157 1166 for (i = 1; i < ZIO_TYPES; i++)
1158 1167 mdb_printf("%11#llx%s", vs->vs_bytes[i],
1159 1168 i == ZIO_TYPES - 1 ? "" : " ");
1160 1169
1161 1170
1162 1171 mdb_printf("\n");
1163 1172 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors);
1164 1173 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors);
1165 1174 mdb_printf("ECKSUM %10#llx\n",
1166 1175 vs->vs_checksum_errors);
1167 1176 mdb_dec_indent(4);
1168 1177 }
1169 1178
1170 1179 if (stats)
1171 1180 mdb_printf("\n");
1172 1181 }
1173 1182
1174 1183 children = vdev.vdev_children;
1175 1184
1176 1185 if (children == 0 || !recursive)
1177 1186 return (DCMD_OK);
1178 1187
1179 1188 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC);
1180 1189 if (mdb_vread(child, children * sizeof (void *),
1181 1190 (uintptr_t)vdev.vdev_child) == -1) {
1182 1191 mdb_warn("failed to read vdev children at %p", vdev.vdev_child);
1183 1192 return (DCMD_ERR);
1184 1193 }
1185 1194
1186 1195 for (c = 0; c < children; c++) {
1187 1196 if (do_print_vdev(child[c], flags, depth + 2, stats,
1188 1197 recursive))
1189 1198 return (DCMD_ERR);
1190 1199 }
1191 1200
1192 1201 return (DCMD_OK);
1193 1202 }
1194 1203
1195 1204 static int
1196 1205 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1197 1206 {
1198 1207 int recursive = FALSE;
1199 1208 int stats = FALSE;
1200 1209 uint64_t depth = 0;
1201 1210
1202 1211 if (mdb_getopts(argc, argv,
1203 1212 'r', MDB_OPT_SETBITS, TRUE, &recursive,
1204 1213 'e', MDB_OPT_SETBITS, TRUE, &stats,
1205 1214 'd', MDB_OPT_UINT64, &depth,
1206 1215 NULL) != argc)
1207 1216 return (DCMD_USAGE);
1208 1217
1209 1218 if (!(flags & DCMD_ADDRSPEC)) {
1210 1219 mdb_warn("no vdev_t address given\n");
1211 1220 return (DCMD_ERR);
1212 1221 }
1213 1222
1214 1223 return (do_print_vdev(addr, flags, (int)depth, stats, recursive));
1215 1224 }
1216 1225
1217 1226 typedef struct metaslab_walk_data {
1218 1227 uint64_t mw_numvdevs;
1219 1228 uintptr_t *mw_vdevs;
1220 1229 int mw_curvdev;
1221 1230 uint64_t mw_nummss;
1222 1231 uintptr_t *mw_mss;
1223 1232 int mw_curms;
1224 1233 } metaslab_walk_data_t;
1225 1234
1226 1235 static int
1227 1236 metaslab_walk_step(mdb_walk_state_t *wsp)
1228 1237 {
1229 1238 metaslab_walk_data_t *mw = wsp->walk_data;
1230 1239 metaslab_t ms;
1231 1240 uintptr_t msp;
1232 1241
1233 1242 if (mw->mw_curvdev >= mw->mw_numvdevs)
1234 1243 return (WALK_DONE);
1235 1244
1236 1245 if (mw->mw_mss == NULL) {
1237 1246 uintptr_t mssp;
1238 1247 uintptr_t vdevp;
1239 1248
1240 1249 ASSERT(mw->mw_curms == 0);
1241 1250 ASSERT(mw->mw_nummss == 0);
1242 1251
1243 1252 vdevp = mw->mw_vdevs[mw->mw_curvdev];
1244 1253 if (GETMEMB(vdevp, struct vdev, vdev_ms, mssp) ||
1245 1254 GETMEMB(vdevp, struct vdev, vdev_ms_count, mw->mw_nummss)) {
1246 1255 return (WALK_ERR);
1247 1256 }
1248 1257
1249 1258 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*),
1250 1259 UM_SLEEP | UM_GC);
1251 1260 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*),
1252 1261 mssp) == -1) {
1253 1262 mdb_warn("failed to read vdev_ms at %p", mssp);
1254 1263 return (WALK_ERR);
1255 1264 }
1256 1265 }
1257 1266
1258 1267 if (mw->mw_curms >= mw->mw_nummss) {
1259 1268 mw->mw_mss = NULL;
1260 1269 mw->mw_curms = 0;
1261 1270 mw->mw_nummss = 0;
1262 1271 mw->mw_curvdev++;
1263 1272 return (WALK_NEXT);
1264 1273 }
1265 1274
1266 1275 msp = mw->mw_mss[mw->mw_curms];
1267 1276 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) {
1268 1277 mdb_warn("failed to read metaslab_t at %p", msp);
1269 1278 return (WALK_ERR);
1270 1279 }
1271 1280
1272 1281 mw->mw_curms++;
1273 1282
1274 1283 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata));
1275 1284 }
1276 1285
1277 1286 /* ARGSUSED */
1278 1287 static int
1279 1288 metaslab_walk_init(mdb_walk_state_t *wsp)
1280 1289 {
1281 1290 metaslab_walk_data_t *mw;
1282 1291 uintptr_t root_vdevp;
1283 1292 uintptr_t childp;
1284 1293
1285 1294 if (wsp->walk_addr == NULL) {
1286 1295 mdb_warn("must supply address of spa_t\n");
1287 1296 return (WALK_ERR);
1288 1297 }
1289 1298
1290 1299 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC);
1291 1300
1292 1301 if (GETMEMB(wsp->walk_addr, struct spa, spa_root_vdev, root_vdevp) ||
1293 1302 GETMEMB(root_vdevp, struct vdev, vdev_children, mw->mw_numvdevs) ||
1294 1303 GETMEMB(root_vdevp, struct vdev, vdev_child, childp)) {
1295 1304 return (DCMD_ERR);
1296 1305 }
1297 1306
1298 1307 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *),
1299 1308 UM_SLEEP | UM_GC);
1300 1309 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *),
1301 1310 childp) == -1) {
1302 1311 mdb_warn("failed to read root vdev children at %p", childp);
1303 1312 return (DCMD_ERR);
1304 1313 }
1305 1314
1306 1315 wsp->walk_data = mw;
1307 1316
1308 1317 return (WALK_NEXT);
1309 1318 }
1310 1319
1311 1320 typedef struct mdb_spa {
1312 1321 uintptr_t spa_dsl_pool;
1313 1322 uintptr_t spa_root_vdev;
1314 1323 } mdb_spa_t;
1315 1324
1316 1325 typedef struct mdb_dsl_dir {
1317 1326 uintptr_t dd_phys;
1318 1327 int64_t dd_space_towrite[TXG_SIZE];
1319 1328 } mdb_dsl_dir_t;
1320 1329
1321 1330 typedef struct mdb_dsl_dir_phys {
1322 1331 uint64_t dd_used_bytes;
1323 1332 uint64_t dd_compressed_bytes;
1324 1333 uint64_t dd_uncompressed_bytes;
1325 1334 } mdb_dsl_dir_phys_t;
1326 1335
1327 1336 typedef struct mdb_vdev {
1328 1337 uintptr_t vdev_parent;
1329 1338 uintptr_t vdev_ms;
1330 1339 uint64_t vdev_ms_count;
1331 1340 vdev_stat_t vdev_stat;
1332 1341 } mdb_vdev_t;
1333 1342
1334 1343 typedef struct mdb_metaslab {
1335 1344 space_map_t ms_allocmap[TXG_SIZE];
1336 1345 space_map_t ms_freemap[TXG_SIZE];
1337 1346 space_map_t ms_map;
1338 1347 space_map_obj_t ms_smo;
1339 1348 space_map_obj_t ms_smo_syncing;
1340 1349 } mdb_metaslab_t;
1341 1350
1342 1351 typedef struct space_data {
1343 1352 uint64_t ms_allocmap[TXG_SIZE];
1344 1353 uint64_t ms_freemap[TXG_SIZE];
1345 1354 uint64_t ms_map;
1346 1355 uint64_t avail;
1347 1356 uint64_t nowavail;
1348 1357 } space_data_t;
1349 1358
1350 1359 /* ARGSUSED */
1351 1360 static int
1352 1361 space_cb(uintptr_t addr, const void *unknown, void *arg)
1353 1362 {
1354 1363 space_data_t *sd = arg;
1355 1364 mdb_metaslab_t ms;
1356 1365
1357 1366 if (GETMEMB(addr, struct metaslab, ms_allocmap, ms.ms_allocmap) ||
1358 1367 GETMEMB(addr, struct metaslab, ms_freemap, ms.ms_freemap) ||
1359 1368 GETMEMB(addr, struct metaslab, ms_map, ms.ms_map) ||
1360 1369 GETMEMB(addr, struct metaslab, ms_smo, ms.ms_smo) ||
1361 1370 GETMEMB(addr, struct metaslab, ms_smo_syncing, ms.ms_smo_syncing)) {
1362 1371 return (WALK_ERR);
1363 1372 }
1364 1373
1365 1374 sd->ms_allocmap[0] += ms.ms_allocmap[0].sm_space;
1366 1375 sd->ms_allocmap[1] += ms.ms_allocmap[1].sm_space;
1367 1376 sd->ms_allocmap[2] += ms.ms_allocmap[2].sm_space;
1368 1377 sd->ms_allocmap[3] += ms.ms_allocmap[3].sm_space;
1369 1378 sd->ms_freemap[0] += ms.ms_freemap[0].sm_space;
1370 1379 sd->ms_freemap[1] += ms.ms_freemap[1].sm_space;
1371 1380 sd->ms_freemap[2] += ms.ms_freemap[2].sm_space;
1372 1381 sd->ms_freemap[3] += ms.ms_freemap[3].sm_space;
1373 1382 sd->ms_map += ms.ms_map.sm_space;
1374 1383 sd->avail += ms.ms_map.sm_size - ms.ms_smo.smo_alloc;
1375 1384 sd->nowavail += ms.ms_map.sm_size - ms.ms_smo_syncing.smo_alloc;
1376 1385
1377 1386 return (WALK_NEXT);
1378 1387 }
1379 1388
1380 1389 /*
1381 1390 * ::spa_space [-b]
1382 1391 *
1383 1392 * Given a spa_t, print out it's on-disk space usage and in-core
1384 1393 * estimates of future usage. If -b is given, print space in bytes.
1385 1394 * Otherwise print in megabytes.
1386 1395 */
1387 1396 /* ARGSUSED */
1388 1397 static int
1389 1398 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1390 1399 {
1391 1400 mdb_spa_t spa;
1392 1401 uintptr_t dp_root_dir;
1393 1402 mdb_dsl_dir_t dd;
1394 1403 mdb_dsl_dir_phys_t dsp;
1395 1404 uint64_t children;
1396 1405 uintptr_t childaddr;
1397 1406 space_data_t sd;
1398 1407 int shift = 20;
1399 1408 char *suffix = "M";
1400 1409 int bits = FALSE;
1401 1410
1402 1411 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bits, NULL) !=
1403 1412 argc)
1404 1413 return (DCMD_USAGE);
1405 1414 if (!(flags & DCMD_ADDRSPEC))
1406 1415 return (DCMD_USAGE);
1407 1416
1408 1417 if (bits) {
1409 1418 shift = 0;
1410 1419 suffix = "";
1411 1420 }
1412 1421
1413 1422 if (GETMEMB(addr, struct spa, spa_dsl_pool, spa.spa_dsl_pool) ||
1414 1423 GETMEMB(addr, struct spa, spa_root_vdev, spa.spa_root_vdev) ||
1415 1424 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_children, children) ||
1416 1425 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_child, childaddr) ||
1417 1426 GETMEMB(spa.spa_dsl_pool, struct dsl_pool,
1418 1427 dp_root_dir, dp_root_dir) ||
1419 1428 GETMEMB(dp_root_dir, struct dsl_dir, dd_phys, dd.dd_phys) ||
1420 1429 GETMEMB(dp_root_dir, struct dsl_dir,
1421 1430 dd_space_towrite, dd.dd_space_towrite) ||
1422 1431 GETMEMB(dd.dd_phys, struct dsl_dir_phys,
1423 1432 dd_used_bytes, dsp.dd_used_bytes) ||
1424 1433 GETMEMB(dd.dd_phys, struct dsl_dir_phys,
1425 1434 dd_compressed_bytes, dsp.dd_compressed_bytes) ||
1426 1435 GETMEMB(dd.dd_phys, struct dsl_dir_phys,
1427 1436 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) {
1428 1437 return (DCMD_ERR);
1429 1438 }
1430 1439
1431 1440 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n",
1432 1441 dd.dd_space_towrite[0] >> shift, suffix,
1433 1442 dd.dd_space_towrite[1] >> shift, suffix,
1434 1443 dd.dd_space_towrite[2] >> shift, suffix,
1435 1444 dd.dd_space_towrite[3] >> shift, suffix);
1436 1445
1437 1446 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n",
1438 1447 dsp.dd_used_bytes >> shift, suffix);
1439 1448 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n",
1440 1449 dsp.dd_compressed_bytes >> shift, suffix);
1441 1450 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n",
1442 1451 dsp.dd_uncompressed_bytes >> shift, suffix);
1443 1452
1444 1453 bzero(&sd, sizeof (sd));
1445 1454 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) {
1446 1455 mdb_warn("can't walk metaslabs");
1447 1456 return (DCMD_ERR);
1448 1457 }
1449 1458
1450 1459 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n",
1451 1460 sd.ms_allocmap[0] >> shift, suffix,
1452 1461 sd.ms_allocmap[1] >> shift, suffix,
1453 1462 sd.ms_allocmap[2] >> shift, suffix,
1454 1463 sd.ms_allocmap[3] >> shift, suffix);
1455 1464 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n",
1456 1465 sd.ms_freemap[0] >> shift, suffix,
1457 1466 sd.ms_freemap[1] >> shift, suffix,
1458 1467 sd.ms_freemap[2] >> shift, suffix,
1459 1468 sd.ms_freemap[3] >> shift, suffix);
1460 1469 mdb_printf("ms_map = %llu%s\n", sd.ms_map >> shift, suffix);
1461 1470 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix);
1462 1471 mdb_printf("current syncing avail = %llu%s\n",
1463 1472 sd.nowavail >> shift, suffix);
1464 1473
1465 1474 return (DCMD_OK);
1466 1475 }
1467 1476
1468 1477 /*
1469 1478 * ::spa_verify
1470 1479 *
1471 1480 * Given a spa_t, verify that that the pool is self-consistent.
1472 1481 * Currently, it only checks to make sure that the vdev tree exists.
1473 1482 */
1474 1483 /* ARGSUSED */
1475 1484 static int
1476 1485 spa_verify(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1477 1486 {
1478 1487 spa_t spa;
1479 1488
1480 1489 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1481 1490 return (DCMD_USAGE);
1482 1491
1483 1492 if (mdb_vread(&spa, sizeof (spa), addr) == -1) {
1484 1493 mdb_warn("failed to read spa_t at %p", addr);
1485 1494 return (DCMD_ERR);
1486 1495 }
1487 1496
1488 1497 if (spa.spa_root_vdev == NULL) {
1489 1498 mdb_printf("no vdev tree present\n");
1490 1499 return (DCMD_OK);
1491 1500 }
1492 1501
1493 1502 return (DCMD_OK);
1494 1503 }
1495 1504
1496 1505 static int
1497 1506 spa_print_aux(spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v,
1498 1507 const char *name)
1499 1508 {
1500 1509 uintptr_t *aux;
1501 1510 size_t len;
1502 1511 int ret, i;
1503 1512
1504 1513 /*
1505 1514 * Iterate over aux vdevs and print those out as well. This is a
1506 1515 * little annoying because we don't have a root vdev to pass to ::vdev.
1507 1516 * Instead, we print a single line and then call it for each child
1508 1517 * vdev.
1509 1518 */
1510 1519 if (sav->sav_count != 0) {
1511 1520 v[1].a_type = MDB_TYPE_STRING;
1512 1521 v[1].a_un.a_str = "-d";
1513 1522 v[2].a_type = MDB_TYPE_IMMEDIATE;
1514 1523 v[2].a_un.a_val = 2;
1515 1524
1516 1525 len = sav->sav_count * sizeof (uintptr_t);
1517 1526 aux = mdb_alloc(len, UM_SLEEP);
1518 1527 if (mdb_vread(aux, len,
1519 1528 (uintptr_t)sav->sav_vdevs) == -1) {
1520 1529 mdb_free(aux, len);
1521 1530 mdb_warn("failed to read l2cache vdevs at %p",
1522 1531 sav->sav_vdevs);
1523 1532 return (DCMD_ERR);
1524 1533 }
1525 1534
1526 1535 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name);
1527 1536
1528 1537 for (i = 0; i < sav->sav_count; i++) {
1529 1538 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v);
1530 1539 if (ret != DCMD_OK) {
1531 1540 mdb_free(aux, len);
1532 1541 return (ret);
1533 1542 }
1534 1543 }
1535 1544
1536 1545 mdb_free(aux, len);
1537 1546 }
1538 1547
1539 1548 return (0);
1540 1549 }
1541 1550
1542 1551 /*
1543 1552 * ::spa_vdevs
1544 1553 *
1545 1554 * -e Include error stats
1546 1555 *
1547 1556 * Print out a summarized list of vdevs for the given spa_t.
1548 1557 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as
1549 1558 * iterating over the cache devices.
1550 1559 */
1551 1560 /* ARGSUSED */
1552 1561 static int
1553 1562 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1554 1563 {
1555 1564 spa_t spa;
1556 1565 mdb_arg_t v[3];
1557 1566 int errors = FALSE;
1558 1567 int ret;
1559 1568
1560 1569 if (mdb_getopts(argc, argv,
1561 1570 'e', MDB_OPT_SETBITS, TRUE, &errors,
1562 1571 NULL) != argc)
1563 1572 return (DCMD_USAGE);
1564 1573
1565 1574 if (!(flags & DCMD_ADDRSPEC))
1566 1575 return (DCMD_USAGE);
1567 1576
1568 1577 if (mdb_vread(&spa, sizeof (spa), addr) == -1) {
1569 1578 mdb_warn("failed to read spa_t at %p", addr);
1570 1579 return (DCMD_ERR);
1571 1580 }
1572 1581
1573 1582 /*
1574 1583 * Unitialized spa_t structures can have a NULL root vdev.
1575 1584 */
1576 1585 if (spa.spa_root_vdev == NULL) {
1577 1586 mdb_printf("no associated vdevs\n");
1578 1587 return (DCMD_OK);
1579 1588 }
1580 1589
1581 1590 v[0].a_type = MDB_TYPE_STRING;
1582 1591 v[0].a_un.a_str = errors ? "-re" : "-r";
1583 1592
1584 1593 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev,
1585 1594 flags, 1, v);
1586 1595 if (ret != DCMD_OK)
1587 1596 return (ret);
1588 1597
1589 1598 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 ||
1590 1599 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0)
1591 1600 return (DCMD_ERR);
1592 1601
1593 1602 return (DCMD_OK);
1594 1603 }
1595 1604
1596 1605 /*
1597 1606 * ::zio
1598 1607 *
1599 1608 * Print a summary of zio_t and all its children. This is intended to display a
1600 1609 * zio tree, and hence we only pick the most important pieces of information for
1601 1610 * the main summary. More detailed information can always be found by doing a
1602 1611 * '::print zio' on the underlying zio_t. The columns we display are:
1603 1612 *
1604 1613 * ADDRESS TYPE STAGE WAITER
1605 1614 *
1606 1615 * The 'address' column is indented by one space for each depth level as we
1607 1616 * descend down the tree.
1608 1617 */
1609 1618
1610 1619 #define ZIO_MAXINDENT 24
1611 1620 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT)
1612 1621 #define ZIO_WALK_SELF 0
1613 1622 #define ZIO_WALK_CHILD 1
1614 1623 #define ZIO_WALK_PARENT 2
1615 1624
1616 1625 typedef struct zio_print_args {
1617 1626 int zpa_current_depth;
1618 1627 int zpa_min_depth;
1619 1628 int zpa_max_depth;
1620 1629 int zpa_type;
1621 1630 uint_t zpa_flags;
1622 1631 } zio_print_args_t;
1623 1632
1624 1633 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg);
1625 1634
1626 1635 static int
1627 1636 zio_print_cb(uintptr_t addr, const void *data, void *priv)
1628 1637 {
1629 1638 const zio_t *zio = data;
1630 1639 zio_print_args_t *zpa = priv;
1631 1640 mdb_ctf_id_t type_enum, stage_enum;
1632 1641 int indent = zpa->zpa_current_depth;
1633 1642 const char *type, *stage;
1634 1643 uintptr_t laddr;
1635 1644
1636 1645 if (indent > ZIO_MAXINDENT)
1637 1646 indent = ZIO_MAXINDENT;
1638 1647
1639 1648 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 ||
1640 1649 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) {
1641 1650 mdb_warn("failed to lookup zio enums");
1642 1651 return (WALK_ERR);
1643 1652 }
1644 1653
1645 1654 if ((type = mdb_ctf_enum_name(type_enum, zio->io_type)) != NULL)
1646 1655 type += sizeof ("ZIO_TYPE_") - 1;
1647 1656 else
1648 1657 type = "?";
1649 1658
1650 1659 if ((stage = mdb_ctf_enum_name(stage_enum, zio->io_stage)) != NULL)
1651 1660 stage += sizeof ("ZIO_STAGE_") - 1;
1652 1661 else
1653 1662 stage = "?";
1654 1663
1655 1664 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) {
1656 1665 if (zpa->zpa_flags & DCMD_PIPE_OUT) {
1657 1666 mdb_printf("%?p\n", addr);
1658 1667 } else {
1659 1668 mdb_printf("%*s%-*p %-5s %-16s ", indent, "",
1660 1669 ZIO_MAXWIDTH - indent, addr, type, stage);
1661 1670 if (zio->io_waiter)
1662 1671 mdb_printf("%?p\n", zio->io_waiter);
1663 1672 else
1664 1673 mdb_printf("-\n");
1665 1674 }
1666 1675 }
1667 1676
1668 1677 if (zpa->zpa_current_depth >= zpa->zpa_max_depth)
1669 1678 return (WALK_NEXT);
1670 1679
1671 1680 if (zpa->zpa_type == ZIO_WALK_PARENT)
1672 1681 laddr = addr + OFFSETOF(zio_t, io_parent_list);
1673 1682 else
1674 1683 laddr = addr + OFFSETOF(zio_t, io_child_list);
1675 1684
1676 1685 zpa->zpa_current_depth++;
1677 1686 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) {
1678 1687 mdb_warn("failed to walk zio_t children at %p\n", laddr);
1679 1688 return (WALK_ERR);
1680 1689 }
1681 1690 zpa->zpa_current_depth--;
1682 1691
1683 1692 return (WALK_NEXT);
1684 1693 }
1685 1694
1686 1695 /* ARGSUSED */
1687 1696 static int
1688 1697 zio_child_cb(uintptr_t addr, const void *unknown, void *arg)
1689 1698 {
1690 1699 zio_link_t zl;
1691 1700 zio_t zio;
1692 1701 uintptr_t ziop;
1693 1702 zio_print_args_t *zpa = arg;
1694 1703
1695 1704 if (mdb_vread(&zl, sizeof (zl), addr) == -1) {
1696 1705 mdb_warn("failed to read zio_link_t at %p", addr);
1697 1706 return (WALK_ERR);
1698 1707 }
1699 1708
1700 1709 if (zpa->zpa_type == ZIO_WALK_PARENT)
1701 1710 ziop = (uintptr_t)zl.zl_parent;
1702 1711 else
1703 1712 ziop = (uintptr_t)zl.zl_child;
1704 1713
1705 1714 if (mdb_vread(&zio, sizeof (zio_t), ziop) == -1) {
1706 1715 mdb_warn("failed to read zio_t at %p", ziop);
1707 1716 return (WALK_ERR);
1708 1717 }
1709 1718
1710 1719 return (zio_print_cb(ziop, &zio, arg));
1711 1720 }
1712 1721
1713 1722 /* ARGSUSED */
1714 1723 static int
1715 1724 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1716 1725 {
1717 1726 zio_t zio;
1718 1727 zio_print_args_t zpa = { 0 };
1719 1728
1720 1729 if (!(flags & DCMD_ADDRSPEC))
1721 1730 return (DCMD_USAGE);
1722 1731
1723 1732 if (mdb_getopts(argc, argv,
1724 1733 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth,
1725 1734 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type,
1726 1735 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type,
1727 1736 NULL) != argc)
1728 1737 return (DCMD_USAGE);
1729 1738
1730 1739 zpa.zpa_flags = flags;
1731 1740 if (zpa.zpa_max_depth != 0) {
1732 1741 if (zpa.zpa_type == ZIO_WALK_SELF)
1733 1742 zpa.zpa_type = ZIO_WALK_CHILD;
1734 1743 } else if (zpa.zpa_type != ZIO_WALK_SELF) {
1735 1744 zpa.zpa_min_depth = 1;
1736 1745 zpa.zpa_max_depth = 1;
1737 1746 }
1738 1747
1739 1748 if (mdb_vread(&zio, sizeof (zio_t), addr) == -1) {
1740 1749 mdb_warn("failed to read zio_t at %p", addr);
1741 1750 return (DCMD_ERR);
1742 1751 }
1743 1752
1744 1753 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags))
1745 1754 mdb_printf("%<u>%-*s %-5s %-16s %-?s%</u>\n", ZIO_MAXWIDTH,
1746 1755 "ADDRESS", "TYPE", "STAGE", "WAITER");
1747 1756
1748 1757 if (zio_print_cb(addr, &zio, &zpa) != WALK_NEXT)
1749 1758 return (DCMD_ERR);
1750 1759
1751 1760 return (DCMD_OK);
1752 1761 }
1753 1762
1754 1763 /*
1755 1764 * [addr]::zio_state
1756 1765 *
1757 1766 * Print a summary of all zio_t structures on the system, or for a particular
1758 1767 * pool. This is equivalent to '::walk zio_root | ::zio'.
1759 1768 */
1760 1769 /*ARGSUSED*/
1761 1770 static int
1762 1771 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1763 1772 {
1764 1773 /*
1765 1774 * MDB will remember the last address of the pipeline, so if we don't
1766 1775 * zero this we'll end up trying to walk zio structures for a
1767 1776 * non-existent spa_t.
1768 1777 */
1769 1778 if (!(flags & DCMD_ADDRSPEC))
1770 1779 addr = 0;
1771 1780
1772 1781 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr));
1773 1782 }
1774 1783
1775 1784 typedef struct txg_list_walk_data {
1776 1785 uintptr_t lw_head[TXG_SIZE];
1777 1786 int lw_txgoff;
1778 1787 int lw_maxoff;
1779 1788 size_t lw_offset;
1780 1789 void *lw_obj;
1781 1790 } txg_list_walk_data_t;
1782 1791
1783 1792 static int
1784 1793 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff)
1785 1794 {
1786 1795 txg_list_walk_data_t *lwd;
1787 1796 txg_list_t list;
1788 1797 int i;
1789 1798
1790 1799 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC);
1791 1800 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) {
1792 1801 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr);
1793 1802 return (WALK_ERR);
1794 1803 }
1795 1804
1796 1805 for (i = 0; i < TXG_SIZE; i++)
1797 1806 lwd->lw_head[i] = (uintptr_t)list.tl_head[i];
1798 1807 lwd->lw_offset = list.tl_offset;
1799 1808 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t),
1800 1809 UM_SLEEP | UM_GC);
1801 1810 lwd->lw_txgoff = txg;
1802 1811 lwd->lw_maxoff = maxoff;
1803 1812
1804 1813 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
1805 1814 wsp->walk_data = lwd;
1806 1815
1807 1816 return (WALK_NEXT);
1808 1817 }
1809 1818
1810 1819 static int
1811 1820 txg_list_walk_init(mdb_walk_state_t *wsp)
1812 1821 {
1813 1822 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1));
1814 1823 }
1815 1824
1816 1825 static int
1817 1826 txg_list0_walk_init(mdb_walk_state_t *wsp)
1818 1827 {
1819 1828 return (txg_list_walk_init_common(wsp, 0, 0));
1820 1829 }
1821 1830
1822 1831 static int
1823 1832 txg_list1_walk_init(mdb_walk_state_t *wsp)
1824 1833 {
1825 1834 return (txg_list_walk_init_common(wsp, 1, 1));
1826 1835 }
1827 1836
1828 1837 static int
1829 1838 txg_list2_walk_init(mdb_walk_state_t *wsp)
1830 1839 {
1831 1840 return (txg_list_walk_init_common(wsp, 2, 2));
1832 1841 }
1833 1842
1834 1843 static int
1835 1844 txg_list3_walk_init(mdb_walk_state_t *wsp)
1836 1845 {
1837 1846 return (txg_list_walk_init_common(wsp, 3, 3));
1838 1847 }
1839 1848
1840 1849 static int
1841 1850 txg_list_walk_step(mdb_walk_state_t *wsp)
1842 1851 {
1843 1852 txg_list_walk_data_t *lwd = wsp->walk_data;
1844 1853 uintptr_t addr;
1845 1854 txg_node_t *node;
1846 1855 int status;
1847 1856
1848 1857 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) {
1849 1858 lwd->lw_txgoff++;
1850 1859 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
1851 1860 }
1852 1861
1853 1862 if (wsp->walk_addr == NULL)
1854 1863 return (WALK_DONE);
1855 1864
1856 1865 addr = wsp->walk_addr - lwd->lw_offset;
1857 1866
1858 1867 if (mdb_vread(lwd->lw_obj,
1859 1868 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) {
1860 1869 mdb_warn("failed to read list element at %#lx", addr);
1861 1870 return (WALK_ERR);
1862 1871 }
1863 1872
1864 1873 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata);
1865 1874 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset);
1866 1875 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff];
1867 1876
1868 1877 return (status);
1869 1878 }
1870 1879
1871 1880 /*
1872 1881 * ::walk spa
1873 1882 *
1874 1883 * Walk all named spa_t structures in the namespace. This is nothing more than
1875 1884 * a layered avl walk.
1876 1885 */
1877 1886 static int
1878 1887 spa_walk_init(mdb_walk_state_t *wsp)
1879 1888 {
1880 1889 GElf_Sym sym;
1881 1890
1882 1891 if (wsp->walk_addr != NULL) {
1883 1892 mdb_warn("spa walk only supports global walks\n");
1884 1893 return (WALK_ERR);
1885 1894 }
1886 1895
1887 1896 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) {
1888 1897 mdb_warn("failed to find symbol 'spa_namespace_avl'");
1889 1898 return (WALK_ERR);
1890 1899 }
1891 1900
1892 1901 wsp->walk_addr = (uintptr_t)sym.st_value;
1893 1902
1894 1903 if (mdb_layered_walk("avl", wsp) == -1) {
1895 1904 mdb_warn("failed to walk 'avl'\n");
1896 1905 return (WALK_ERR);
1897 1906 }
1898 1907
1899 1908 return (WALK_NEXT);
1900 1909 }
1901 1910
1902 1911 static int
1903 1912 spa_walk_step(mdb_walk_state_t *wsp)
1904 1913 {
1905 1914 spa_t spa;
1906 1915
1907 1916 if (mdb_vread(&spa, sizeof (spa), wsp->walk_addr) == -1) {
1908 1917 mdb_warn("failed to read spa_t at %p", wsp->walk_addr);
1909 1918 return (WALK_ERR);
1910 1919 }
1911 1920
1912 1921 return (wsp->walk_callback(wsp->walk_addr, &spa, wsp->walk_cbdata));
1913 1922 }
1914 1923
1915 1924 /*
1916 1925 * [addr]::walk zio
1917 1926 *
1918 1927 * Walk all active zio_t structures on the system. This is simply a layered
1919 1928 * walk on top of ::walk zio_cache, with the optional ability to limit the
1920 1929 * structures to a particular pool.
1921 1930 */
1922 1931 static int
1923 1932 zio_walk_init(mdb_walk_state_t *wsp)
1924 1933 {
1925 1934 wsp->walk_data = (void *)wsp->walk_addr;
1926 1935
1927 1936 if (mdb_layered_walk("zio_cache", wsp) == -1) {
1928 1937 mdb_warn("failed to walk 'zio_cache'\n");
1929 1938 return (WALK_ERR);
1930 1939 }
1931 1940
1932 1941 return (WALK_NEXT);
1933 1942 }
1934 1943
1935 1944 static int
1936 1945 zio_walk_step(mdb_walk_state_t *wsp)
1937 1946 {
1938 1947 zio_t zio;
1939 1948
1940 1949 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) {
1941 1950 mdb_warn("failed to read zio_t at %p", wsp->walk_addr);
1942 1951 return (WALK_ERR);
1943 1952 }
1944 1953
1945 1954 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa)
1946 1955 return (WALK_NEXT);
1947 1956
1948 1957 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
1949 1958 }
1950 1959
1951 1960 /*
1952 1961 * [addr]::walk zio_root
1953 1962 *
1954 1963 * Walk only root zio_t structures, optionally for a particular spa_t.
1955 1964 */
1956 1965 static int
1957 1966 zio_walk_root_step(mdb_walk_state_t *wsp)
1958 1967 {
1959 1968 zio_t zio;
1960 1969
1961 1970 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) {
1962 1971 mdb_warn("failed to read zio_t at %p", wsp->walk_addr);
1963 1972 return (WALK_ERR);
1964 1973 }
1965 1974
1966 1975 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa)
1967 1976 return (WALK_NEXT);
1968 1977
1969 1978 /* If the parent list is not empty, ignore */
1970 1979 if (zio.io_parent_list.list_head.list_next !=
1971 1980 &((zio_t *)wsp->walk_addr)->io_parent_list.list_head)
1972 1981 return (WALK_NEXT);
1973 1982
1974 1983 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
1975 1984 }
1976 1985
1977 1986 #define NICENUM_BUFLEN 6
1978 1987
1979 1988 static int
1980 1989 snprintfrac(char *buf, int len,
1981 1990 uint64_t numerator, uint64_t denom, int frac_digits)
1982 1991 {
1983 1992 int mul = 1;
1984 1993 int whole, frac, i;
1985 1994
1986 1995 for (i = frac_digits; i; i--)
1987 1996 mul *= 10;
1988 1997 whole = numerator / denom;
1989 1998 frac = mul * numerator / denom - mul * whole;
1990 1999 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac));
1991 2000 }
1992 2001
1993 2002 static void
1994 2003 mdb_nicenum(uint64_t num, char *buf)
1995 2004 {
1996 2005 uint64_t n = num;
1997 2006 int index = 0;
1998 2007 char *u;
1999 2008
2000 2009 while (n >= 1024) {
2001 2010 n = (n + (1024 / 2)) / 1024; /* Round up or down */
2002 2011 index++;
2003 2012 }
2004 2013
2005 2014 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2];
2006 2015
2007 2016 if (index == 0) {
2008 2017 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu",
2009 2018 (u_longlong_t)n);
2010 2019 } else if (n < 10 && (num & (num - 1)) != 0) {
2011 2020 (void) snprintfrac(buf, NICENUM_BUFLEN,
2012 2021 num, 1ULL << 10 * index, 2);
2013 2022 strcat(buf, u);
2014 2023 } else if (n < 100 && (num & (num - 1)) != 0) {
2015 2024 (void) snprintfrac(buf, NICENUM_BUFLEN,
2016 2025 num, 1ULL << 10 * index, 1);
2017 2026 strcat(buf, u);
2018 2027 } else {
2019 2028 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s",
2020 2029 (u_longlong_t)n, u);
2021 2030 }
2022 2031 }
2023 2032
2024 2033 /*
2025 2034 * ::zfs_blkstats
2026 2035 *
2027 2036 * -v print verbose per-level information
2028 2037 *
2029 2038 */
2030 2039 static int
2031 2040 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2032 2041 {
2033 2042 boolean_t verbose = B_FALSE;
2034 2043 zfs_all_blkstats_t stats;
2035 2044 dmu_object_type_t t;
2036 2045 zfs_blkstat_t *tzb;
2037 2046 uint64_t ditto;
2038 2047 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10];
2039 2048 /* +10 in case it grew */
2040 2049
2041 2050 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) {
2042 2051 mdb_warn("failed to read 'dmu_ot'");
2043 2052 return (DCMD_ERR);
2044 2053 }
2045 2054
2046 2055 if (mdb_getopts(argc, argv,
2047 2056 'v', MDB_OPT_SETBITS, TRUE, &verbose,
2048 2057 NULL) != argc)
2049 2058 return (DCMD_USAGE);
2050 2059
2051 2060 if (!(flags & DCMD_ADDRSPEC))
2052 2061 return (DCMD_USAGE);
2053 2062
2054 2063 if (GETMEMB(addr, struct spa, spa_dsl_pool, addr) ||
2055 2064 GETMEMB(addr, struct dsl_pool, dp_blkstats, addr) ||
2056 2065 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) {
2057 2066 mdb_warn("failed to read data at %p;", addr);
2058 2067 mdb_printf("maybe no stats? run \"zpool scrub\" first.");
2059 2068 return (DCMD_ERR);
2060 2069 }
2061 2070
2062 2071 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_NUMTYPES];
2063 2072 if (tzb->zb_gangs != 0) {
2064 2073 mdb_printf("Ganged blocks: %llu\n",
2065 2074 (longlong_t)tzb->zb_gangs);
2066 2075 }
2067 2076
2068 2077 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev +
2069 2078 tzb->zb_ditto_3_of_3_samevdev;
2070 2079 if (ditto != 0) {
2071 2080 mdb_printf("Dittoed blocks on same vdev: %llu\n",
2072 2081 (longlong_t)ditto);
2073 2082 }
2074 2083
2075 2084 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2076 2085 "\t avg\t comp\t%%Total\tType\n");
2077 2086
2078 2087 for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
2079 2088 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN];
2080 2089 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN];
2081 2090 char avg[NICENUM_BUFLEN];
2082 2091 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN];
2083 2092 char typename[64];
2084 2093 int l;
2085 2094
2086 2095
2087 2096 if (t == DMU_OT_DEFERRED)
2088 2097 strcpy(typename, "deferred free");
2089 2098 else if (t == DMU_OT_TOTAL)
2090 2099 strcpy(typename, "Total");
2091 2100 else if (mdb_readstr(typename, sizeof (typename),
2092 2101 (uintptr_t)dmu_ot[t].ot_name) == -1) {
2093 2102 mdb_warn("failed to read type name");
2094 2103 return (DCMD_ERR);
2095 2104 }
2096 2105
2097 2106 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0)
2098 2107 continue;
2099 2108
2100 2109 for (l = -1; l < DN_MAX_LEVELS; l++) {
2101 2110 int level = (l == -1 ? DN_MAX_LEVELS : l);
2102 2111 zfs_blkstat_t *zb = &stats.zab_type[level][t];
2103 2112
2104 2113 if (zb->zb_asize == 0)
2105 2114 continue;
2106 2115
2107 2116 /*
2108 2117 * Don't print each level unless requested.
2109 2118 */
2110 2119 if (!verbose && level != DN_MAX_LEVELS)
2111 2120 continue;
2112 2121
2113 2122 /*
2114 2123 * If all the space is level 0, don't print the
2115 2124 * level 0 separately.
2116 2125 */
2117 2126 if (level == 0 && zb->zb_asize ==
2118 2127 stats.zab_type[DN_MAX_LEVELS][t].zb_asize)
2119 2128 continue;
2120 2129
2121 2130 mdb_nicenum(zb->zb_count, csize);
2122 2131 mdb_nicenum(zb->zb_lsize, lsize);
2123 2132 mdb_nicenum(zb->zb_psize, psize);
2124 2133 mdb_nicenum(zb->zb_asize, asize);
2125 2134 mdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2126 2135 (void) snprintfrac(comp, NICENUM_BUFLEN,
2127 2136 zb->zb_lsize, zb->zb_psize, 2);
2128 2137 (void) snprintfrac(pct, NICENUM_BUFLEN,
2129 2138 100 * zb->zb_asize, tzb->zb_asize, 2);
2130 2139
2131 2140 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s"
2132 2141 "\t%5s\t%6s\t",
2133 2142 csize, lsize, psize, asize, avg, comp, pct);
2134 2143
2135 2144 if (level == DN_MAX_LEVELS)
2136 2145 mdb_printf("%s\n", typename);
2137 2146 else
2138 2147 mdb_printf(" L%d %s\n",
2139 2148 level, typename);
2140 2149 }
2141 2150 }
2142 2151
2143 2152 return (DCMD_OK);
2144 2153 }
2145 2154
2146 2155 /*
2147 2156 * MDB module linkage information:
2148 2157 *
2149 2158 * We declare a list of structures describing our dcmds, and a function
2150 2159 * named _mdb_init to return a pointer to our module information.
2151 2160 */
2152 2161
2153 2162 static const mdb_dcmd_t dcmds[] = {
2154 2163 { "arc", "[-bkmg]", "print ARC variables", arc_print },
2155 2164 { "blkptr", ":", "print blkptr_t", blkptr },
2156 2165 { "dbuf", ":", "print dmu_buf_impl_t", dbuf },
2157 2166 { "dbuf_stats", ":", "dbuf stats", dbuf_stats },
2158 2167 { "dbufs",
2159 2168 "\t[-O objset_impl_t*] [-n objset_name | \"mos\"] "
2160 2169 "[-o object | \"mdn\"] \n"
2161 2170 "\t[-l level] [-b blkid | \"bonus\"]",
2162 2171 "find dmu_buf_impl_t's that match specified criteria", dbufs },
2163 2172 { "abuf_find", "dva_word[0] dva_word[1]",
2164 2173 "find arc_buf_hdr_t of a specified DVA",
2165 2174 abuf_find },
2166 2175 { "spa", "?[-cv]", "spa_t summary", spa_print },
2167 2176 { "spa_config", ":", "print spa_t configuration", spa_print_config },
2168 2177 { "spa_verify", ":", "verify spa_t consistency", spa_verify },
2169 2178 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space },
2170 2179 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs },
2171 2180 { "vdev", ":[-re]\n"
2172 2181 "\t-r display recursively\n"
2173 2182 "\t-e print statistics",
2174 2183 "vdev_t summary", vdev_print },
2175 2184 { "zio", ":[cpr]\n"
2176 2185 "\t-c display children\n"
2177 2186 "\t-p display parents\n"
2178 2187 "\t-r display recursively",
2179 2188 "zio_t summary", zio_print },
2180 2189 { "zio_state", "?", "print out all zio_t structures on system or "
2181 2190 "for a particular pool", zio_state },
2182 2191 { "zio_pipeline", ":", "decode a zio pipeline", zio_pipeline },
2183 2192 { "zfs_blkstats", ":[-v]",
2184 2193 "given a spa_t, print block type stats from last scrub",
2185 2194 zfs_blkstats },
2186 2195 { "zfs_params", "", "print zfs tunable parameters", zfs_params },
2187 2196 { NULL }
2188 2197 };
2189 2198
2190 2199 static const mdb_walker_t walkers[] = {
2191 2200 /*
2192 2201 * In userland, there is no generic provider of list_t walkers, so we
2193 2202 * need to add it.
2194 2203 */
2195 2204 #ifndef _KERNEL
2196 2205 { LIST_WALK_NAME, LIST_WALK_DESC,
2197 2206 list_walk_init, list_walk_step, list_walk_fini },
2198 2207 #endif
2199 2208 { "zms_freelist", "walk ZFS metaslab freelist",
2200 2209 freelist_walk_init, freelist_walk_step, NULL },
2201 2210 { "txg_list", "given any txg_list_t *, walk all entries in all txgs",
2202 2211 txg_list_walk_init, txg_list_walk_step, NULL },
2203 2212 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0",
2204 2213 txg_list0_walk_init, txg_list_walk_step, NULL },
2205 2214 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1",
2206 2215 txg_list1_walk_init, txg_list_walk_step, NULL },
2207 2216 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2",
2208 2217 txg_list2_walk_init, txg_list_walk_step, NULL },
2209 2218 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3",
2210 2219 txg_list3_walk_init, txg_list_walk_step, NULL },
2211 2220 { "zio", "walk all zio structures, optionally for a particular spa_t",
2212 2221 zio_walk_init, zio_walk_step, NULL },
2213 2222 { "zio_root", "walk all root zio_t structures, optionally for a "
2214 2223 "particular spa_t",
2215 2224 zio_walk_init, zio_walk_root_step, NULL },
2216 2225 { "spa", "walk all spa_t entries in the namespace",
2217 2226 spa_walk_init, spa_walk_step, NULL },
2218 2227 { "metaslab", "given a spa_t *, walk all metaslab_t structures",
2219 2228 metaslab_walk_init, metaslab_walk_step, NULL },
2220 2229 { NULL }
2221 2230 };
2222 2231
2223 2232 static const mdb_modinfo_t modinfo = {
2224 2233 MDB_API_VERSION, dcmds, walkers
2225 2234 };
2226 2235
2227 2236 const mdb_modinfo_t *
2228 2237 _mdb_init(void)
2229 2238 {
2230 2239 return (&modinfo);
2231 2240 }
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