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 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
25 */
26
27 /* Portions Copyright 2010 Robert Milkowski */
28
29 #include <mdb/mdb_ctf.h>
30 #include <sys/zfs_context.h>
31 #include <sys/mdb_modapi.h>
32 #include <sys/dbuf.h>
33 #include <sys/dmu_objset.h>
34 #include <sys/dsl_dir.h>
35 #include <sys/dsl_pool.h>
36 #include <sys/metaslab_impl.h>
37 #include <sys/space_map.h>
38 #include <sys/list.h>
39 #include <sys/vdev_impl.h>
40 #include <sys/zap_leaf.h>
41 #include <sys/zap_impl.h>
42 #include <ctype.h>
43 #include <sys/zfs_acl.h>
44 #include <sys/sa_impl.h>
45
46 #ifdef _KERNEL
47 #define ZFS_OBJ_NAME "zfs"
48 extern int64_t mdb_gethrtime(void);
49 #else
50 #define ZFS_OBJ_NAME "libzpool.so.1"
51 #endif
52
53 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`"
54
55 #ifndef _KERNEL
56 int aok;
57 #endif
58
59 enum spa_flags {
60 SPA_FLAG_CONFIG = 1 << 0,
61 SPA_FLAG_VDEVS = 1 << 1,
62 SPA_FLAG_ERRORS = 1 << 2,
63 SPA_FLAG_METASLAB_GROUPS = 1 << 3,
64 SPA_FLAG_METASLABS = 1 << 4,
65 SPA_FLAG_HISTOGRAMS = 1 << 5
66 };
67
68 #define SPA_FLAG_ALL_VDEV \
69 (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \
70 SPA_FLAG_METASLABS | SPA_FLAG_HISTOGRAMS)
71
72 static int
73 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp,
74 const char *member, int len, void *buf)
75 {
76 mdb_ctf_id_t id;
77 ulong_t off;
78 char name[64];
79
80 if (idp == NULL) {
81 if (mdb_ctf_lookup_by_name(type, &id) == -1) {
82 mdb_warn("couldn't find type %s", type);
83 return (DCMD_ERR);
84 }
85 idp = &id;
86 } else {
87 type = name;
88 mdb_ctf_type_name(*idp, name, sizeof (name));
89 }
90
91 if (mdb_ctf_offsetof(*idp, member, &off) == -1) {
92 mdb_warn("couldn't find member %s of type %s\n", member, type);
93 return (DCMD_ERR);
94 }
95 if (off % 8 != 0) {
96 mdb_warn("member %s of type %s is unsupported bitfield",
97 member, type);
98 return (DCMD_ERR);
99 }
100 off /= 8;
101
102 if (mdb_vread(buf, len, addr + off) == -1) {
103 mdb_warn("failed to read %s from %s at %p",
104 member, type, addr + off);
105 return (DCMD_ERR);
106 }
107 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */
108
109 return (0);
110 }
111
112 #define GETMEMB(addr, structname, member, dest) \
113 getmember(addr, ZFS_STRUCT structname, NULL, #member, \
114 sizeof (dest), &(dest))
115
116 #define GETMEMBID(addr, ctfid, member, dest) \
117 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest))
118
119 static boolean_t
120 strisprint(const char *cp)
121 {
122 for (; *cp; cp++) {
123 if (!isprint(*cp))
124 return (B_FALSE);
125 }
126 return (B_TRUE);
127 }
128
129 #define NICENUM_BUFLEN 6
130
131 static int
132 snprintfrac(char *buf, int len,
133 uint64_t numerator, uint64_t denom, int frac_digits)
134 {
135 int mul = 1;
136 int whole, frac, i;
137
138 for (i = frac_digits; i; i--)
139 mul *= 10;
140 whole = numerator / denom;
141 frac = mul * numerator / denom - mul * whole;
142 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac));
143 }
144
145 static void
146 mdb_nicenum(uint64_t num, char *buf)
147 {
148 uint64_t n = num;
149 int index = 0;
150 char *u;
151
152 while (n >= 1024) {
153 n = (n + (1024 / 2)) / 1024; /* Round up or down */
154 index++;
155 }
156
157 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2];
158
159 if (index == 0) {
160 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu",
161 (u_longlong_t)n);
162 } else if (n < 10 && (num & (num - 1)) != 0) {
163 (void) snprintfrac(buf, NICENUM_BUFLEN,
164 num, 1ULL << 10 * index, 2);
165 strcat(buf, u);
166 } else if (n < 100 && (num & (num - 1)) != 0) {
167 (void) snprintfrac(buf, NICENUM_BUFLEN,
168 num, 1ULL << 10 * index, 1);
169 strcat(buf, u);
170 } else {
171 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s",
172 (u_longlong_t)n, u);
173 }
174 }
175
176 static int verbose;
177
178 static int
179 freelist_walk_init(mdb_walk_state_t *wsp)
180 {
181 if (wsp->walk_addr == NULL) {
182 mdb_warn("must supply starting address\n");
183 return (WALK_ERR);
184 }
185
186 wsp->walk_data = 0; /* Index into the freelist */
187 return (WALK_NEXT);
188 }
189
190 static int
191 freelist_walk_step(mdb_walk_state_t *wsp)
192 {
193 uint64_t entry;
194 uintptr_t number = (uintptr_t)wsp->walk_data;
195 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
196 "INVALID", "INVALID", "INVALID", "INVALID" };
197 int mapshift = SPA_MINBLOCKSHIFT;
198
199 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) {
200 mdb_warn("failed to read freelist entry %p", wsp->walk_addr);
201 return (WALK_DONE);
202 }
203 wsp->walk_addr += sizeof (entry);
204 wsp->walk_data = (void *)(number + 1);
205
206 if (SM_DEBUG_DECODE(entry)) {
207 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n",
208 number,
209 ddata[SM_DEBUG_ACTION_DECODE(entry)],
210 SM_DEBUG_TXG_DECODE(entry),
211 SM_DEBUG_SYNCPASS_DECODE(entry));
212 } else {
213 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c "
214 "size=%06llx", number,
215 SM_OFFSET_DECODE(entry) << mapshift,
216 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) <<
217 mapshift,
218 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
219 SM_RUN_DECODE(entry) << mapshift);
220 if (verbose)
221 mdb_printf(" (raw=%012llx)\n", entry);
222 mdb_printf("\n");
223 }
224 return (WALK_NEXT);
225 }
226
227 static int
228 mdb_dsl_dir_name(uintptr_t addr, char *buf)
229 {
230 static int gotid;
231 static mdb_ctf_id_t dd_id;
232 uintptr_t dd_parent;
233 char dd_myname[MAXNAMELEN];
234
235 if (!gotid) {
236 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir",
237 &dd_id) == -1) {
238 mdb_warn("couldn't find struct dsl_dir");
239 return (DCMD_ERR);
240 }
241 gotid = TRUE;
242 }
243 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) ||
244 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) {
245 return (DCMD_ERR);
246 }
247
248 if (dd_parent) {
249 if (mdb_dsl_dir_name(dd_parent, buf))
250 return (DCMD_ERR);
251 strcat(buf, "/");
252 }
253
254 if (dd_myname[0])
255 strcat(buf, dd_myname);
256 else
257 strcat(buf, "???");
258
259 return (0);
260 }
261
262 static int
263 objset_name(uintptr_t addr, char *buf)
264 {
265 static int gotid;
266 static mdb_ctf_id_t os_id, ds_id;
267 uintptr_t os_dsl_dataset;
268 char ds_snapname[MAXNAMELEN];
269 uintptr_t ds_dir;
270
271 buf[0] = '\0';
272
273 if (!gotid) {
274 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset",
275 &os_id) == -1) {
276 mdb_warn("couldn't find struct objset");
277 return (DCMD_ERR);
278 }
279 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset",
280 &ds_id) == -1) {
281 mdb_warn("couldn't find struct dsl_dataset");
282 return (DCMD_ERR);
283 }
284
285 gotid = TRUE;
286 }
287
288 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset))
289 return (DCMD_ERR);
290
291 if (os_dsl_dataset == 0) {
292 strcat(buf, "mos");
293 return (0);
294 }
295
296 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) ||
297 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) {
298 return (DCMD_ERR);
299 }
300
301 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf))
302 return (DCMD_ERR);
303
304 if (ds_snapname[0]) {
305 strcat(buf, "@");
306 strcat(buf, ds_snapname);
307 }
308 return (0);
309 }
310
311 static void
312 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val,
313 const char *prefix)
314 {
315 const char *cp;
316 size_t len = strlen(prefix);
317
318 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) {
319 if (strncmp(cp, prefix, len) == 0)
320 cp += len;
321 (void) strncpy(out, cp, size);
322 } else {
323 mdb_snprintf(out, size, "? (%d)", val);
324 }
325 }
326
327 /* ARGSUSED */
328 static int
329 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
330 {
331 /*
332 * This table can be approximately generated by running:
333 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2
334 */
335 static const char *params[] = {
336 "arc_reduce_dnlc_percent",
337 "arc_lotsfree_percent",
338 "zfs_dirty_data_max",
339 "zfs_dirty_data_sync",
340 "zfs_delay_max_ns",
341 "zfs_delay_min_dirty_percent",
342 "zfs_delay_scale",
343 "zfs_vdev_max_active",
344 "zfs_vdev_sync_read_min_active",
345 "zfs_vdev_sync_read_max_active",
346 "zfs_vdev_sync_write_min_active",
347 "zfs_vdev_sync_write_max_active",
348 "zfs_vdev_async_read_min_active",
349 "zfs_vdev_async_read_max_active",
350 "zfs_vdev_async_write_min_active",
351 "zfs_vdev_async_write_max_active",
352 "zfs_vdev_scrub_min_active",
353 "zfs_vdev_scrub_max_active",
354 "zfs_vdev_async_write_active_min_dirty_percent",
355 "zfs_vdev_async_write_active_max_dirty_percent",
356 "spa_asize_inflation",
357 "zfs_arc_max",
358 "zfs_arc_min",
359 "arc_shrink_shift",
360 "zfs_mdcomp_disable",
361 "zfs_prefetch_disable",
362 "zfetch_max_streams",
363 "zfetch_min_sec_reap",
364 "zfetch_block_cap",
365 "zfetch_array_rd_sz",
366 "zfs_default_bs",
367 "zfs_default_ibs",
368 "metaslab_aliquot",
369 "reference_tracking_enable",
370 "reference_history",
371 "spa_max_replication_override",
372 "spa_mode_global",
373 "zfs_flags",
374 "zfs_txg_timeout",
375 "zfs_vdev_cache_max",
376 "zfs_vdev_cache_size",
377 "zfs_vdev_cache_bshift",
378 "vdev_mirror_shift",
379 "zfs_scrub_limit",
380 "zfs_no_scrub_io",
381 "zfs_no_scrub_prefetch",
382 "zfs_vdev_aggregation_limit",
383 "fzap_default_block_shift",
384 "zfs_immediate_write_sz",
385 "zfs_read_chunk_size",
386 "zfs_nocacheflush",
387 "zil_replay_disable",
388 "metaslab_gang_bang",
389 "metaslab_df_alloc_threshold",
390 "metaslab_df_free_pct",
391 "zio_injection_enabled",
392 "zvol_immediate_write_sz",
393 "zio_max_timeout_ms",
394 "zio_min_timeout_ms",
395 "zio_timeout_shift",
396 };
397
398 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) {
399 int sz;
400 uint64_t val64;
401 uint32_t *val32p = (uint32_t *)&val64;
402
403 sz = mdb_readvar(&val64, params[i]);
404 if (sz == 4) {
405 mdb_printf("%s = 0x%x\n", params[i], *val32p);
406 } else if (sz == 8) {
407 mdb_printf("%s = 0x%llx\n", params[i], val64);
408 } else {
409 mdb_warn("variable %s not found", params[i]);
410 }
411 }
412
413 return (DCMD_OK);
414 }
415
416 /* ARGSUSED */
417 static int
418 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
419 {
420 mdb_ctf_id_t type_enum, checksum_enum, compress_enum;
421 char type[80], checksum[80], compress[80];
422 blkptr_t blk, *bp = &blk;
423 char buf[BP_SPRINTF_LEN];
424
425 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) {
426 mdb_warn("failed to read blkptr_t");
427 return (DCMD_ERR);
428 }
429
430 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 ||
431 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 ||
432 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) {
433 mdb_warn("Could not find blkptr enumerated types");
434 return (DCMD_ERR);
435 }
436
437 enum_lookup(type, sizeof (type), type_enum,
438 BP_GET_TYPE(bp), "DMU_OT_");
439 enum_lookup(checksum, sizeof (checksum), checksum_enum,
440 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_");
441 enum_lookup(compress, sizeof (compress), compress_enum,
442 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_");
443
444 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type,
445 checksum, compress);
446
447 mdb_printf("%s\n", buf);
448
449 return (DCMD_OK);
450 }
451
452 typedef struct mdb_dmu_buf_impl {
453 struct {
454 uint64_t db_object;
455 } db;
456 uintptr_t db_objset;
457 uint64_t db_level;
458 uint64_t db_blkid;
459 struct {
460 uint64_t rc_count;
461 } db_holds;
462 } mdb_dmu_buf_impl_t;
463
464 /* ARGSUSED */
465 static int
466 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
467 {
468 mdb_dmu_buf_impl_t db;
469 char objectname[32];
470 char blkidname[32];
471 char path[MAXNAMELEN];
472
473 if (DCMD_HDRSPEC(flags))
474 mdb_printf(" addr object lvl blkid holds os\n");
475
476 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
477 addr, 0) == -1)
478 return (DCMD_ERR);
479
480 if (db.db.db_object == DMU_META_DNODE_OBJECT)
481 (void) strcpy(objectname, "mdn");
482 else
483 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx",
484 (u_longlong_t)db.db.db_object);
485
486 if (db.db_blkid == DMU_BONUS_BLKID)
487 (void) strcpy(blkidname, "bonus");
488 else
489 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx",
490 (u_longlong_t)db.db_blkid);
491
492 if (objset_name(db.db_objset, path)) {
493 return (DCMD_ERR);
494 }
495
496 mdb_printf("%p %8s %1u %9s %2llu %s\n", addr,
497 objectname, (int)db.db_level, blkidname,
498 db.db_holds.rc_count, path);
499
500 return (DCMD_OK);
501 }
502
503 /* ARGSUSED */
504 static int
505 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
506 {
507 #define HISTOSZ 32
508 uintptr_t dbp;
509 dmu_buf_impl_t db;
510 dbuf_hash_table_t ht;
511 uint64_t bucket, ndbufs;
512 uint64_t histo[HISTOSZ];
513 uint64_t histo2[HISTOSZ];
514 int i, maxidx;
515
516 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) {
517 mdb_warn("failed to read 'dbuf_hash_table'");
518 return (DCMD_ERR);
519 }
520
521 for (i = 0; i < HISTOSZ; i++) {
522 histo[i] = 0;
523 histo2[i] = 0;
524 }
525
526 ndbufs = 0;
527 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) {
528 int len;
529
530 if (mdb_vread(&dbp, sizeof (void *),
531 (uintptr_t)(ht.hash_table+bucket)) == -1) {
532 mdb_warn("failed to read hash bucket %u at %p",
533 bucket, ht.hash_table+bucket);
534 return (DCMD_ERR);
535 }
536
537 len = 0;
538 while (dbp != 0) {
539 if (mdb_vread(&db, sizeof (dmu_buf_impl_t),
540 dbp) == -1) {
541 mdb_warn("failed to read dbuf at %p", dbp);
542 return (DCMD_ERR);
543 }
544 dbp = (uintptr_t)db.db_hash_next;
545 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--)
546 histo2[i]++;
547 len++;
548 ndbufs++;
549 }
550
551 if (len >= HISTOSZ)
552 len = HISTOSZ-1;
553 histo[len]++;
554 }
555
556 mdb_printf("hash table has %llu buckets, %llu dbufs "
557 "(avg %llu buckets/dbuf)\n",
558 ht.hash_table_mask+1, ndbufs,
559 (ht.hash_table_mask+1)/ndbufs);
560
561 mdb_printf("\n");
562 maxidx = 0;
563 for (i = 0; i < HISTOSZ; i++)
564 if (histo[i] > 0)
565 maxidx = i;
566 mdb_printf("hash chain length number of buckets\n");
567 for (i = 0; i <= maxidx; i++)
568 mdb_printf("%u %llu\n", i, histo[i]);
569
570 mdb_printf("\n");
571 maxidx = 0;
572 for (i = 0; i < HISTOSZ; i++)
573 if (histo2[i] > 0)
574 maxidx = i;
575 mdb_printf("hash chain depth number of dbufs\n");
576 for (i = 0; i <= maxidx; i++)
577 mdb_printf("%u or more %llu %llu%%\n",
578 i, histo2[i], histo2[i]*100/ndbufs);
579
580
581 return (DCMD_OK);
582 }
583
584 #define CHAIN_END 0xffff
585 /*
586 * ::zap_leaf [-v]
587 *
588 * Print a zap_leaf_phys_t, assumed to be 16k
589 */
590 /* ARGSUSED */
591 static int
592 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
593 {
594 char buf[16*1024];
595 int verbose = B_FALSE;
596 int four = B_FALSE;
597 zap_leaf_t l;
598 zap_leaf_phys_t *zlp = (void *)buf;
599 int i;
600
601 if (mdb_getopts(argc, argv,
602 'v', MDB_OPT_SETBITS, TRUE, &verbose,
603 '4', MDB_OPT_SETBITS, TRUE, &four,
604 NULL) != argc)
605 return (DCMD_USAGE);
606
607 l.l_phys = zlp;
608 l.l_bs = 14; /* assume 16k blocks */
609 if (four)
610 l.l_bs = 12;
611
612 if (!(flags & DCMD_ADDRSPEC)) {
613 return (DCMD_USAGE);
614 }
615
616 if (mdb_vread(buf, sizeof (buf), addr) == -1) {
617 mdb_warn("failed to read zap_leaf_phys_t at %p", addr);
618 return (DCMD_ERR);
619 }
620
621 if (zlp->l_hdr.lh_block_type != ZBT_LEAF ||
622 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) {
623 mdb_warn("This does not appear to be a zap_leaf_phys_t");
624 return (DCMD_ERR);
625 }
626
627 mdb_printf("zap_leaf_phys_t at %p:\n", addr);
628 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len);
629 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix);
630 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries);
631 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree,
632 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l)));
633 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist);
634 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags,
635 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ?
636 "ENTRIES_CDSORTED" : "");
637
638 if (verbose) {
639 mdb_printf(" hash table:\n");
640 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) {
641 if (zlp->l_hash[i] != CHAIN_END)
642 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]);
643 }
644 }
645
646 mdb_printf(" chunks:\n");
647 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) {
648 /* LINTED: alignment */
649 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i);
650 switch (zlc->l_entry.le_type) {
651 case ZAP_CHUNK_FREE:
652 if (verbose) {
653 mdb_printf(" %u: free; lf_next = %u\n",
654 i, zlc->l_free.lf_next);
655 }
656 break;
657 case ZAP_CHUNK_ENTRY:
658 mdb_printf(" %u: entry\n", i);
659 if (verbose) {
660 mdb_printf(" le_next = %u\n",
661 zlc->l_entry.le_next);
662 }
663 mdb_printf(" le_name_chunk = %u\n",
664 zlc->l_entry.le_name_chunk);
665 mdb_printf(" le_name_numints = %u\n",
666 zlc->l_entry.le_name_numints);
667 mdb_printf(" le_value_chunk = %u\n",
668 zlc->l_entry.le_value_chunk);
669 mdb_printf(" le_value_intlen = %u\n",
670 zlc->l_entry.le_value_intlen);
671 mdb_printf(" le_value_numints = %u\n",
672 zlc->l_entry.le_value_numints);
673 mdb_printf(" le_cd = %u\n",
674 zlc->l_entry.le_cd);
675 mdb_printf(" le_hash = %llx\n",
676 zlc->l_entry.le_hash);
677 break;
678 case ZAP_CHUNK_ARRAY:
679 mdb_printf(" %u: array", i);
680 if (strisprint((char *)zlc->l_array.la_array))
681 mdb_printf(" \"%s\"", zlc->l_array.la_array);
682 mdb_printf("\n");
683 if (verbose) {
684 int j;
685 mdb_printf(" ");
686 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) {
687 mdb_printf("%02x ",
688 zlc->l_array.la_array[j]);
689 }
690 mdb_printf("\n");
691 }
692 if (zlc->l_array.la_next != CHAIN_END) {
693 mdb_printf(" lf_next = %u\n",
694 zlc->l_array.la_next);
695 }
696 break;
697 default:
698 mdb_printf(" %u: undefined type %u\n",
699 zlc->l_entry.le_type);
700 }
701 }
702
703 return (DCMD_OK);
704 }
705
706 typedef struct dbufs_data {
707 mdb_ctf_id_t id;
708 uint64_t objset;
709 uint64_t object;
710 uint64_t level;
711 uint64_t blkid;
712 char *osname;
713 } dbufs_data_t;
714
715 #define DBUFS_UNSET (0xbaddcafedeadbeefULL)
716
717 /* ARGSUSED */
718 static int
719 dbufs_cb(uintptr_t addr, const void *unknown, void *arg)
720 {
721 dbufs_data_t *data = arg;
722 uintptr_t objset;
723 dmu_buf_t db;
724 uint8_t level;
725 uint64_t blkid;
726 char osname[MAXNAMELEN];
727
728 if (GETMEMBID(addr, &data->id, db_objset, objset) ||
729 GETMEMBID(addr, &data->id, db, db) ||
730 GETMEMBID(addr, &data->id, db_level, level) ||
731 GETMEMBID(addr, &data->id, db_blkid, blkid)) {
732 return (WALK_ERR);
733 }
734
735 if ((data->objset == DBUFS_UNSET || data->objset == objset) &&
736 (data->osname == NULL || (objset_name(objset, osname) == 0 &&
737 strcmp(data->osname, osname) == 0)) &&
738 (data->object == DBUFS_UNSET || data->object == db.db_object) &&
739 (data->level == DBUFS_UNSET || data->level == level) &&
740 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) {
741 mdb_printf("%#lr\n", addr);
742 }
743 return (WALK_NEXT);
744 }
745
746 /* ARGSUSED */
747 static int
748 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
749 {
750 dbufs_data_t data;
751 char *object = NULL;
752 char *blkid = NULL;
753
754 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET;
755 data.osname = NULL;
756
757 if (mdb_getopts(argc, argv,
758 'O', MDB_OPT_UINT64, &data.objset,
759 'n', MDB_OPT_STR, &data.osname,
760 'o', MDB_OPT_STR, &object,
761 'l', MDB_OPT_UINT64, &data.level,
762 'b', MDB_OPT_STR, &blkid) != argc) {
763 return (DCMD_USAGE);
764 }
765
766 if (object) {
767 if (strcmp(object, "mdn") == 0) {
768 data.object = DMU_META_DNODE_OBJECT;
769 } else {
770 data.object = mdb_strtoull(object);
771 }
772 }
773
774 if (blkid) {
775 if (strcmp(blkid, "bonus") == 0) {
776 data.blkid = DMU_BONUS_BLKID;
777 } else {
778 data.blkid = mdb_strtoull(blkid);
779 }
780 }
781
782 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) {
783 mdb_warn("couldn't find struct dmu_buf_impl_t");
784 return (DCMD_ERR);
785 }
786
787 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) {
788 mdb_warn("can't walk dbufs");
789 return (DCMD_ERR);
790 }
791
792 return (DCMD_OK);
793 }
794
795 typedef struct abuf_find_data {
796 dva_t dva;
797 mdb_ctf_id_t id;
798 } abuf_find_data_t;
799
800 /* ARGSUSED */
801 static int
802 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg)
803 {
804 abuf_find_data_t *data = arg;
805 dva_t dva;
806
807 if (GETMEMBID(addr, &data->id, b_dva, dva)) {
808 return (WALK_ERR);
809 }
810
811 if (dva.dva_word[0] == data->dva.dva_word[0] &&
812 dva.dva_word[1] == data->dva.dva_word[1]) {
813 mdb_printf("%#lr\n", addr);
814 }
815 return (WALK_NEXT);
816 }
817
818 /* ARGSUSED */
819 static int
820 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
821 {
822 abuf_find_data_t data;
823 GElf_Sym sym;
824 int i;
825 const char *syms[] = {
826 "ARC_mru",
827 "ARC_mru_ghost",
828 "ARC_mfu",
829 "ARC_mfu_ghost",
830 };
831
832 if (argc != 2)
833 return (DCMD_USAGE);
834
835 for (i = 0; i < 2; i ++) {
836 switch (argv[i].a_type) {
837 case MDB_TYPE_STRING:
838 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str);
839 break;
840 case MDB_TYPE_IMMEDIATE:
841 data.dva.dva_word[i] = argv[i].a_un.a_val;
842 break;
843 default:
844 return (DCMD_USAGE);
845 }
846 }
847
848 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) {
849 mdb_warn("couldn't find struct arc_buf_hdr");
850 return (DCMD_ERR);
851 }
852
853 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) {
854 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) {
855 mdb_warn("can't find symbol %s", syms[i]);
856 return (DCMD_ERR);
857 }
858
859 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) {
860 mdb_warn("can't walk %s", syms[i]);
861 return (DCMD_ERR);
862 }
863 }
864
865 return (DCMD_OK);
866 }
867
868
869 typedef struct dbgmsg_arg {
870 boolean_t da_verbose;
871 boolean_t da_address;
872 } dbgmsg_arg_t;
873
874 /* ARGSUSED */
875 static int
876 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg)
877 {
878 static mdb_ctf_id_t id;
879 static boolean_t gotid;
880 static ulong_t off;
881
882 dbgmsg_arg_t *da = arg;
883 time_t timestamp;
884 char buf[1024];
885
886 if (!gotid) {
887 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) ==
888 -1) {
889 mdb_warn("couldn't find struct zfs_dbgmsg");
890 return (WALK_ERR);
891 }
892 gotid = TRUE;
893 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) {
894 mdb_warn("couldn't find zdm_msg");
895 return (WALK_ERR);
896 }
897 off /= 8;
898 }
899
900
901 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) {
902 return (WALK_ERR);
903 }
904
905 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) {
906 mdb_warn("failed to read zdm_msg at %p\n", addr + off);
907 return (DCMD_ERR);
908 }
909
910 if (da->da_address)
911 mdb_printf("%p ", addr);
912 if (da->da_verbose)
913 mdb_printf("%Y ", timestamp);
914
915 mdb_printf("%s\n", buf);
916
917 if (da->da_verbose)
918 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
919
920 return (WALK_NEXT);
921 }
922
923 /* ARGSUSED */
924 static int
925 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
926 {
927 GElf_Sym sym;
928 dbgmsg_arg_t da = { 0 };
929
930 if (mdb_getopts(argc, argv,
931 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose,
932 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address,
933 NULL) != argc)
934 return (DCMD_USAGE);
935
936 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) {
937 mdb_warn("can't find zfs_dbgmsgs");
938 return (DCMD_ERR);
939 }
940
941 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) {
942 mdb_warn("can't walk zfs_dbgmsgs");
943 return (DCMD_ERR);
944 }
945
946 return (DCMD_OK);
947 }
948
949 /*ARGSUSED*/
950 static int
951 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
952 {
953 kstat_named_t *stats;
954 GElf_Sym sym;
955 int nstats, i;
956 uint_t opt_a = FALSE;
957 uint_t opt_b = FALSE;
958 uint_t shift = 0;
959 const char *suffix;
960
961 static const char *bytestats[] = {
962 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size",
963 "arc_meta_used", "arc_meta_limit", "arc_meta_max",
964 NULL
965 };
966
967 static const char *extras[] = {
968 "arc_no_grow", "arc_tempreserve",
969 NULL
970 };
971
972 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) {
973 mdb_warn("failed to find 'arc_stats'");
974 return (DCMD_ERR);
975 }
976
977 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC);
978
979 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) {
980 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value);
981 return (DCMD_ERR);
982 }
983
984 nstats = sym.st_size / sizeof (kstat_named_t);
985
986 /* NB: -a / opt_a are ignored for backwards compatability */
987 if (mdb_getopts(argc, argv,
988 'a', MDB_OPT_SETBITS, TRUE, &opt_a,
989 'b', MDB_OPT_SETBITS, TRUE, &opt_b,
990 'k', MDB_OPT_SETBITS, 10, &shift,
991 'm', MDB_OPT_SETBITS, 20, &shift,
992 'g', MDB_OPT_SETBITS, 30, &shift,
993 NULL) != argc)
994 return (DCMD_USAGE);
995
996 if (!opt_b && !shift)
997 shift = 20;
998
999 switch (shift) {
1000 case 0:
1001 suffix = "B";
1002 break;
1003 case 10:
1004 suffix = "KB";
1005 break;
1006 case 20:
1007 suffix = "MB";
1008 break;
1009 case 30:
1010 suffix = "GB";
1011 break;
1012 default:
1013 suffix = "XX";
1014 }
1015
1016 for (i = 0; i < nstats; i++) {
1017 int j;
1018 boolean_t bytes = B_FALSE;
1019
1020 for (j = 0; bytestats[j]; j++) {
1021 if (strcmp(stats[i].name, bytestats[j]) == 0) {
1022 bytes = B_TRUE;
1023 break;
1024 }
1025 }
1026
1027 if (bytes) {
1028 mdb_printf("%-25s = %9llu %s\n", stats[i].name,
1029 stats[i].value.ui64 >> shift, suffix);
1030 } else {
1031 mdb_printf("%-25s = %9llu\n", stats[i].name,
1032 stats[i].value.ui64);
1033 }
1034 }
1035
1036 for (i = 0; extras[i]; i++) {
1037 uint64_t buf;
1038
1039 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) {
1040 mdb_warn("failed to find '%s'", extras[i]);
1041 return (DCMD_ERR);
1042 }
1043
1044 if (sym.st_size != sizeof (uint64_t) &&
1045 sym.st_size != sizeof (uint32_t)) {
1046 mdb_warn("expected scalar for variable '%s'\n",
1047 extras[i]);
1048 return (DCMD_ERR);
1049 }
1050
1051 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) {
1052 mdb_warn("couldn't read '%s'", extras[i]);
1053 return (DCMD_ERR);
1054 }
1055
1056 mdb_printf("%-25s = ", extras[i]);
1057
1058 /* NB: all the 64-bit extras happen to be byte counts */
1059 if (sym.st_size == sizeof (uint64_t))
1060 mdb_printf("%9llu %s\n", buf >> shift, suffix);
1061
1062 if (sym.st_size == sizeof (uint32_t))
1063 mdb_printf("%9d\n", *((uint32_t *)&buf));
1064 }
1065 return (DCMD_OK);
1066 }
1067
1068 typedef struct mdb_spa_print {
1069 pool_state_t spa_state;
1070 char spa_name[MAXNAMELEN];
1071 } mdb_spa_print_t;
1072
1073 /*
1074 * ::spa
1075 *
1076 * -c Print configuration information as well
1077 * -v Print vdev state
1078 * -e Print vdev error stats
1079 * -m Print vdev metaslab info
1080 * -M print vdev metaslab group info
1081 * -h Print histogram info (must be combined with -m or -M)
1082 *
1083 * Print a summarized spa_t. When given no arguments, prints out a table of all
1084 * active pools on the system.
1085 */
1086 /* ARGSUSED */
1087 static int
1088 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1089 {
1090 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED",
1091 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" };
1092 const char *state;
1093 int spa_flags = 0;
1094
1095 if (mdb_getopts(argc, argv,
1096 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags,
1097 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags,
1098 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1099 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1100 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1101 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1102 NULL) != argc)
1103 return (DCMD_USAGE);
1104
1105 if (!(flags & DCMD_ADDRSPEC)) {
1106 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) {
1107 mdb_warn("can't walk spa");
1108 return (DCMD_ERR);
1109 }
1110
1111 return (DCMD_OK);
1112 }
1113
1114 if (flags & DCMD_PIPE_OUT) {
1115 mdb_printf("%#lr\n", addr);
1116 return (DCMD_OK);
1117 }
1118
1119 if (DCMD_HDRSPEC(flags))
1120 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE",
1121 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME");
1122
1123 mdb_spa_print_t spa;
1124 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1)
1125 return (DCMD_ERR);
1126
1127 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL)
1128 state = "UNKNOWN";
1129 else
1130 state = statetab[spa.spa_state];
1131
1132 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name);
1133
1134 if (spa_flags & SPA_FLAG_CONFIG) {
1135 mdb_printf("\n");
1136 mdb_inc_indent(4);
1137 if (mdb_call_dcmd("spa_config", addr, flags, 0,
1138 NULL) != DCMD_OK)
1139 return (DCMD_ERR);
1140 mdb_dec_indent(4);
1141 }
1142
1143 if (spa_flags & SPA_FLAG_ALL_VDEV) {
1144 mdb_arg_t v;
1145 char opts[100] = "-";
1146 int args =
1147 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1;
1148
1149 if (spa_flags & SPA_FLAG_ERRORS)
1150 strcat(opts, "e");
1151 if (spa_flags & SPA_FLAG_METASLABS)
1152 strcat(opts, "m");
1153 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1154 strcat(opts, "M");
1155 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1156 strcat(opts, "h");
1157
1158 v.a_type = MDB_TYPE_STRING;
1159 v.a_un.a_str = opts;
1160
1161 mdb_printf("\n");
1162 mdb_inc_indent(4);
1163 if (mdb_call_dcmd("spa_vdevs", addr, flags, args,
1164 &v) != DCMD_OK)
1165 return (DCMD_ERR);
1166 mdb_dec_indent(4);
1167 }
1168
1169 return (DCMD_OK);
1170 }
1171
1172 typedef struct mdb_spa_config_spa {
1173 uintptr_t spa_config;
1174 } mdb_spa_config_spa_t;
1175
1176 /*
1177 * ::spa_config
1178 *
1179 * Given a spa_t, print the configuration information stored in spa_config.
1180 * Since it's just an nvlist, format it as an indented list of name=value pairs.
1181 * We simply read the value of spa_config and pass off to ::nvlist.
1182 */
1183 /* ARGSUSED */
1184 static int
1185 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1186 {
1187 mdb_spa_config_spa_t spa;
1188
1189 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1190 return (DCMD_USAGE);
1191
1192 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t",
1193 addr, 0) == -1)
1194 return (DCMD_ERR);
1195
1196 if (spa.spa_config == 0) {
1197 mdb_printf("(none)\n");
1198 return (DCMD_OK);
1199 }
1200
1201 return (mdb_call_dcmd("nvlist", spa.spa_config, flags,
1202 0, NULL));
1203 }
1204
1205 const char histo_stars[] = "****************************************";
1206 const int histo_width = sizeof (histo_stars) - 1;
1207
1208 static void
1209 dump_histogram(const uint64_t *histo, int size, int offset)
1210 {
1211 int i;
1212 int minidx = size - 1;
1213 int maxidx = 0;
1214 uint64_t max = 0;
1215
1216 for (i = 0; i < size; i++) {
1217 if (histo[i] > max)
1218 max = histo[i];
1219 if (histo[i] > 0 && i > maxidx)
1220 maxidx = i;
1221 if (histo[i] > 0 && i < minidx)
1222 minidx = i;
1223 }
1224
1225 if (max < histo_width)
1226 max = histo_width;
1227
1228 for (i = minidx; i <= maxidx; i++) {
1229 mdb_printf("%3u: %6llu %s\n",
1230 i + offset, (u_longlong_t)histo[i],
1231 &histo_stars[(max - histo[i]) * histo_width / max]);
1232 }
1233 }
1234
1235 typedef struct mdb_range_tree {
1236 uint64_t rt_space;
1237 } mdb_range_tree_t;
1238
1239 typedef struct mdb_metaslab_group {
1240 uint64_t mg_fragmentation;
1241 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE];
1242 } mdb_metaslab_group_t;
1243
1244 typedef struct mdb_metaslab {
1245 uint64_t ms_id;
1246 uint64_t ms_start;
1247 uint64_t ms_size;
1248 uint64_t ms_fragmentation;
1249 uintptr_t ms_alloctree[TXG_SIZE];
1250 uintptr_t ms_freetree[TXG_SIZE];
1251 uintptr_t ms_tree;
1252 uintptr_t ms_sm;
1253 } mdb_metaslab_t;
1254
1255 typedef struct mdb_space_map_phys_t {
1256 uint64_t smp_alloc;
1257 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE];
1258 } mdb_space_map_phys_t;
1259
1260 typedef struct mdb_space_map {
1261 uint64_t sm_size;
1262 uint8_t sm_shift;
1263 uint64_t sm_alloc;
1264 uintptr_t sm_phys;
1265 } mdb_space_map_t;
1266
1267 typedef struct mdb_vdev {
1268 uintptr_t vdev_ms;
1269 uint64_t vdev_ms_count;
1270 vdev_stat_t vdev_stat;
1271 } mdb_vdev_t;
1272
1273 static int
1274 metaslab_stats(uintptr_t addr, int spa_flags)
1275 {
1276 mdb_vdev_t vdev;
1277 uintptr_t *vdev_ms;
1278
1279 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t",
1280 (uintptr_t)addr, 0) == -1) {
1281 mdb_warn("failed to read vdev at %p\n", addr);
1282 return (DCMD_ERR);
1283 }
1284
1285 mdb_inc_indent(4);
1286 mdb_printf("%<u>%-?s %6s %20s %10s %9s%</u>\n", "ADDR", "ID",
1287 "OFFSET", "FREE", "FRAGMENTATION");
1288
1289 vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *),
1290 UM_SLEEP | UM_GC);
1291 if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *),
1292 (uintptr_t)vdev.vdev_ms) == -1) {
1293 mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms);
1294 return (DCMD_ERR);
1295 }
1296
1297 for (int m = 0; m < vdev.vdev_ms_count; m++) {
1298 mdb_metaslab_t ms;
1299 mdb_space_map_t sm = { 0 };
1300 char free[NICENUM_BUFLEN];
1301
1302 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1303 (uintptr_t)vdev_ms[m], 0) == -1)
1304 return (DCMD_ERR);
1305
1306 if (ms.ms_sm != NULL &&
1307 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t",
1308 ms.ms_sm, 0) == -1)
1309 return (DCMD_ERR);
1310
1311 mdb_nicenum(ms.ms_size - sm.sm_alloc, free);
1312
1313 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id,
1314 ms.ms_start, free);
1315 if (ms.ms_fragmentation == ZFS_FRAG_INVALID)
1316 mdb_printf("%9s\n", "-");
1317 else
1318 mdb_printf("%9llu%%\n", ms.ms_fragmentation);
1319
1320 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != NULL) {
1321 mdb_space_map_phys_t smp;
1322
1323 if (sm.sm_phys == NULL)
1324 continue;
1325
1326 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1327 "mdb_space_map_phys_t", sm.sm_phys, 0);
1328
1329 dump_histogram(smp.smp_histogram,
1330 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift);
1331 }
1332 }
1333 mdb_dec_indent(4);
1334 return (DCMD_OK);
1335 }
1336
1337 static int
1338 metaslab_group_stats(uintptr_t addr, int spa_flags)
1339 {
1340 mdb_metaslab_group_t mg;
1341 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t",
1342 (uintptr_t)addr, 0) == -1) {
1343 mdb_warn("failed to read vdev_mg at %p\n", addr);
1344 return (DCMD_ERR);
1345 }
1346
1347 mdb_inc_indent(4);
1348 mdb_printf("%<u>%-?s %15s%</u>\n", "ADDR", "FRAGMENTATION");
1349 if (mg.mg_fragmentation == ZFS_FRAG_INVALID)
1350 mdb_printf("%0?p %15s\n", addr, "-");
1351 else
1352 mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation);
1353
1354 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1355 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1356 mdb_dec_indent(4);
1357 return (DCMD_OK);
1358 }
1359
1360 /*
1361 * ::vdev
1362 *
1363 * Print out a summarized vdev_t, in the following form:
1364 *
1365 * ADDR STATE AUX DESC
1366 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0
1367 *
1368 * If '-r' is specified, recursively visit all children.
1369 *
1370 * With '-e', the statistics associated with the vdev are printed as well.
1371 */
1372 static int
1373 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive,
1374 int spa_flags)
1375 {
1376 vdev_t vdev;
1377 char desc[MAXNAMELEN];
1378 int c, children;
1379 uintptr_t *child;
1380 const char *state, *aux;
1381
1382 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) {
1383 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr);
1384 return (DCMD_ERR);
1385 }
1386
1387 if (flags & DCMD_PIPE_OUT) {
1388 mdb_printf("%#lr\n", addr);
1389 } else {
1390 if (vdev.vdev_path != NULL) {
1391 if (mdb_readstr(desc, sizeof (desc),
1392 (uintptr_t)vdev.vdev_path) == -1) {
1393 mdb_warn("failed to read vdev_path at %p\n",
1394 vdev.vdev_path);
1395 return (DCMD_ERR);
1396 }
1397 } else if (vdev.vdev_ops != NULL) {
1398 vdev_ops_t ops;
1399 if (mdb_vread(&ops, sizeof (ops),
1400 (uintptr_t)vdev.vdev_ops) == -1) {
1401 mdb_warn("failed to read vdev_ops at %p\n",
1402 vdev.vdev_ops);
1403 return (DCMD_ERR);
1404 }
1405 (void) strcpy(desc, ops.vdev_op_type);
1406 } else {
1407 (void) strcpy(desc, "<unknown>");
1408 }
1409
1410 if (depth == 0 && DCMD_HDRSPEC(flags))
1411 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n",
1412 "ADDR", "STATE", "AUX",
1413 sizeof (uintptr_t) == 4 ? 43 : 35,
1414 "DESCRIPTION");
1415
1416 mdb_printf("%0?p ", addr);
1417
1418 switch (vdev.vdev_state) {
1419 case VDEV_STATE_CLOSED:
1420 state = "CLOSED";
1421 break;
1422 case VDEV_STATE_OFFLINE:
1423 state = "OFFLINE";
1424 break;
1425 case VDEV_STATE_CANT_OPEN:
1426 state = "CANT_OPEN";
1427 break;
1428 case VDEV_STATE_DEGRADED:
1429 state = "DEGRADED";
1430 break;
1431 case VDEV_STATE_HEALTHY:
1432 state = "HEALTHY";
1433 break;
1434 case VDEV_STATE_REMOVED:
1435 state = "REMOVED";
1436 break;
1437 case VDEV_STATE_FAULTED:
1438 state = "FAULTED";
1439 break;
1440 default:
1441 state = "UNKNOWN";
1442 break;
1443 }
1444
1445 switch (vdev.vdev_stat.vs_aux) {
1446 case VDEV_AUX_NONE:
1447 aux = "-";
1448 break;
1449 case VDEV_AUX_OPEN_FAILED:
1450 aux = "OPEN_FAILED";
1451 break;
1452 case VDEV_AUX_CORRUPT_DATA:
1453 aux = "CORRUPT_DATA";
1454 break;
1455 case VDEV_AUX_NO_REPLICAS:
1456 aux = "NO_REPLICAS";
1457 break;
1458 case VDEV_AUX_BAD_GUID_SUM:
1459 aux = "BAD_GUID_SUM";
1460 break;
1461 case VDEV_AUX_TOO_SMALL:
1462 aux = "TOO_SMALL";
1463 break;
1464 case VDEV_AUX_BAD_LABEL:
1465 aux = "BAD_LABEL";
1466 break;
1467 case VDEV_AUX_VERSION_NEWER:
1468 aux = "VERS_NEWER";
1469 break;
1470 case VDEV_AUX_VERSION_OLDER:
1471 aux = "VERS_OLDER";
1472 break;
1473 case VDEV_AUX_UNSUP_FEAT:
1474 aux = "UNSUP_FEAT";
1475 break;
1476 case VDEV_AUX_SPARED:
1477 aux = "SPARED";
1478 break;
1479 case VDEV_AUX_ERR_EXCEEDED:
1480 aux = "ERR_EXCEEDED";
1481 break;
1482 case VDEV_AUX_IO_FAILURE:
1483 aux = "IO_FAILURE";
1484 break;
1485 case VDEV_AUX_BAD_LOG:
1486 aux = "BAD_LOG";
1487 break;
1488 case VDEV_AUX_EXTERNAL:
1489 aux = "EXTERNAL";
1490 break;
1491 case VDEV_AUX_SPLIT_POOL:
1492 aux = "SPLIT_POOL";
1493 break;
1494 default:
1495 aux = "UNKNOWN";
1496 break;
1497 }
1498
1499 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc);
1500
1501 if (spa_flags & SPA_FLAG_ERRORS) {
1502 vdev_stat_t *vs = &vdev.vdev_stat;
1503 int i;
1504
1505 mdb_inc_indent(4);
1506 mdb_printf("\n");
1507 mdb_printf("%<u> %12s %12s %12s %12s "
1508 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM",
1509 "IOCTL");
1510 mdb_printf("OPS ");
1511 for (i = 1; i < ZIO_TYPES; i++)
1512 mdb_printf("%11#llx%s", vs->vs_ops[i],
1513 i == ZIO_TYPES - 1 ? "" : " ");
1514 mdb_printf("\n");
1515 mdb_printf("BYTES ");
1516 for (i = 1; i < ZIO_TYPES; i++)
1517 mdb_printf("%11#llx%s", vs->vs_bytes[i],
1518 i == ZIO_TYPES - 1 ? "" : " ");
1519
1520
1521 mdb_printf("\n");
1522 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors);
1523 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors);
1524 mdb_printf("ECKSUM %10#llx\n",
1525 vs->vs_checksum_errors);
1526 mdb_dec_indent(4);
1527 mdb_printf("\n");
1528 }
1529
1530 if (spa_flags & SPA_FLAG_METASLAB_GROUPS &&
1531 vdev.vdev_mg != NULL) {
1532 metaslab_group_stats((uintptr_t)vdev.vdev_mg,
1533 spa_flags);
1534 }
1535 if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) {
1536 metaslab_stats((uintptr_t)addr, spa_flags);
1537 }
1538 }
1539
1540 children = vdev.vdev_children;
1541
1542 if (children == 0 || !recursive)
1543 return (DCMD_OK);
1544
1545 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC);
1546 if (mdb_vread(child, children * sizeof (void *),
1547 (uintptr_t)vdev.vdev_child) == -1) {
1548 mdb_warn("failed to read vdev children at %p", vdev.vdev_child);
1549 return (DCMD_ERR);
1550 }
1551
1552 for (c = 0; c < children; c++) {
1553 if (do_print_vdev(child[c], flags, depth + 2, recursive,
1554 spa_flags)) {
1555 return (DCMD_ERR);
1556 }
1557 }
1558
1559 return (DCMD_OK);
1560 }
1561
1562 static int
1563 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1564 {
1565 uint64_t depth = 0;
1566 boolean_t recursive = B_FALSE;
1567 int spa_flags = 0;
1568
1569 if (mdb_getopts(argc, argv,
1570 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1571 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1572 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1573 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1574 'r', MDB_OPT_SETBITS, TRUE, &recursive,
1575 'd', MDB_OPT_UINT64, &depth, NULL) != argc)
1576 return (DCMD_USAGE);
1577
1578 if (!(flags & DCMD_ADDRSPEC)) {
1579 mdb_warn("no vdev_t address given\n");
1580 return (DCMD_ERR);
1581 }
1582
1583 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags));
1584 }
1585
1586 typedef struct metaslab_walk_data {
1587 uint64_t mw_numvdevs;
1588 uintptr_t *mw_vdevs;
1589 int mw_curvdev;
1590 uint64_t mw_nummss;
1591 uintptr_t *mw_mss;
1592 int mw_curms;
1593 } metaslab_walk_data_t;
1594
1595 static int
1596 metaslab_walk_step(mdb_walk_state_t *wsp)
1597 {
1598 metaslab_walk_data_t *mw = wsp->walk_data;
1599 metaslab_t ms;
1600 uintptr_t msp;
1601
1602 if (mw->mw_curvdev >= mw->mw_numvdevs)
1603 return (WALK_DONE);
1604
1605 if (mw->mw_mss == NULL) {
1606 uintptr_t mssp;
1607 uintptr_t vdevp;
1608
1609 ASSERT(mw->mw_curms == 0);
1610 ASSERT(mw->mw_nummss == 0);
1611
1612 vdevp = mw->mw_vdevs[mw->mw_curvdev];
1613 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) ||
1614 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) {
1615 return (WALK_ERR);
1616 }
1617
1618 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*),
1619 UM_SLEEP | UM_GC);
1620 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*),
1621 mssp) == -1) {
1622 mdb_warn("failed to read vdev_ms at %p", mssp);
1623 return (WALK_ERR);
1624 }
1625 }
1626
1627 if (mw->mw_curms >= mw->mw_nummss) {
1628 mw->mw_mss = NULL;
1629 mw->mw_curms = 0;
1630 mw->mw_nummss = 0;
1631 mw->mw_curvdev++;
1632 return (WALK_NEXT);
1633 }
1634
1635 msp = mw->mw_mss[mw->mw_curms];
1636 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) {
1637 mdb_warn("failed to read metaslab_t at %p", msp);
1638 return (WALK_ERR);
1639 }
1640
1641 mw->mw_curms++;
1642
1643 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata));
1644 }
1645
1646 /* ARGSUSED */
1647 static int
1648 metaslab_walk_init(mdb_walk_state_t *wsp)
1649 {
1650 metaslab_walk_data_t *mw;
1651 uintptr_t root_vdevp;
1652 uintptr_t childp;
1653
1654 if (wsp->walk_addr == NULL) {
1655 mdb_warn("must supply address of spa_t\n");
1656 return (WALK_ERR);
1657 }
1658
1659 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC);
1660
1661 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) ||
1662 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) ||
1663 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) {
1664 return (DCMD_ERR);
1665 }
1666
1667 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *),
1668 UM_SLEEP | UM_GC);
1669 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *),
1670 childp) == -1) {
1671 mdb_warn("failed to read root vdev children at %p", childp);
1672 return (DCMD_ERR);
1673 }
1674
1675 wsp->walk_data = mw;
1676
1677 return (WALK_NEXT);
1678 }
1679
1680 typedef struct mdb_spa {
1681 uintptr_t spa_dsl_pool;
1682 uintptr_t spa_root_vdev;
1683 } mdb_spa_t;
1684
1685 typedef struct mdb_dsl_dir {
1686 uintptr_t dd_phys;
1687 int64_t dd_space_towrite[TXG_SIZE];
1688 } mdb_dsl_dir_t;
1689
1690 typedef struct mdb_dsl_dir_phys {
1691 uint64_t dd_used_bytes;
1692 uint64_t dd_compressed_bytes;
1693 uint64_t dd_uncompressed_bytes;
1694 } mdb_dsl_dir_phys_t;
1695
1696 typedef struct space_data {
1697 uint64_t ms_alloctree[TXG_SIZE];
1698 uint64_t ms_freetree[TXG_SIZE];
1699 uint64_t ms_tree;
1700 uint64_t avail;
1701 uint64_t nowavail;
1702 } space_data_t;
1703
1704 /* ARGSUSED */
1705 static int
1706 space_cb(uintptr_t addr, const void *unknown, void *arg)
1707 {
1708 space_data_t *sd = arg;
1709 mdb_metaslab_t ms;
1710 mdb_range_tree_t rt;
1711 mdb_space_map_t sm = { 0 };
1712 mdb_space_map_phys_t smp = { 0 };
1713 int i;
1714
1715 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1716 addr, 0) == -1)
1717 return (WALK_ERR);
1718
1719 for (i = 0; i < TXG_SIZE; i++) {
1720 if (mdb_ctf_vread(&rt, "range_tree_t",
1721 "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1)
1722 return (WALK_ERR);
1723
1724 sd->ms_alloctree[i] += rt.rt_space;
1725
1726 if (mdb_ctf_vread(&rt, "range_tree_t",
1727 "mdb_range_tree_t", ms.ms_freetree[i], 0) == -1)
1728 return (WALK_ERR);
1729
1730 sd->ms_freetree[i] += rt.rt_space;
1731 }
1732
1733 if (mdb_ctf_vread(&rt, "range_tree_t",
1734 "mdb_range_tree_t", ms.ms_tree, 0) == -1)
1735 return (WALK_ERR);
1736
1737 if (ms.ms_sm != NULL &&
1738 mdb_ctf_vread(&sm, "space_map_t",
1739 "mdb_space_map_t", ms.ms_sm, 0) == -1)
1740 return (WALK_ERR);
1741
1742 if (sm.sm_phys != NULL) {
1743 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1744 "mdb_space_map_phys_t", sm.sm_phys, 0);
1745 }
1746
1747 sd->ms_tree += rt.rt_space;
1748 sd->avail += sm.sm_size - sm.sm_alloc;
1749 sd->nowavail += sm.sm_size - smp.smp_alloc;
1750
1751 return (WALK_NEXT);
1752 }
1753
1754 /*
1755 * ::spa_space [-b]
1756 *
1757 * Given a spa_t, print out it's on-disk space usage and in-core
1758 * estimates of future usage. If -b is given, print space in bytes.
1759 * Otherwise print in megabytes.
1760 */
1761 /* ARGSUSED */
1762 static int
1763 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1764 {
1765 mdb_spa_t spa;
1766 uintptr_t dp_root_dir;
1767 mdb_dsl_dir_t dd;
1768 mdb_dsl_dir_phys_t dsp;
1769 uint64_t children;
1770 uintptr_t childaddr;
1771 space_data_t sd;
1772 int shift = 20;
1773 char *suffix = "M";
1774 int bytes = B_FALSE;
1775
1776 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) !=
1777 argc)
1778 return (DCMD_USAGE);
1779 if (!(flags & DCMD_ADDRSPEC))
1780 return (DCMD_USAGE);
1781
1782 if (bytes) {
1783 shift = 0;
1784 suffix = "";
1785 }
1786
1787 if (GETMEMB(addr, "spa", spa_dsl_pool, spa.spa_dsl_pool) ||
1788 GETMEMB(addr, "spa", spa_root_vdev, spa.spa_root_vdev) ||
1789 GETMEMB(spa.spa_root_vdev, "vdev", vdev_children, children) ||
1790 GETMEMB(spa.spa_root_vdev, "vdev", vdev_child, childaddr) ||
1791 GETMEMB(spa.spa_dsl_pool, "dsl_pool",
1792 dp_root_dir, dp_root_dir) ||
1793 GETMEMB(dp_root_dir, "dsl_dir", dd_phys, dd.dd_phys) ||
1794 GETMEMB(dp_root_dir, "dsl_dir",
1795 dd_space_towrite, dd.dd_space_towrite) ||
1796 GETMEMB(dd.dd_phys, "dsl_dir_phys",
1797 dd_used_bytes, dsp.dd_used_bytes) ||
1798 GETMEMB(dd.dd_phys, "dsl_dir_phys",
1799 dd_compressed_bytes, dsp.dd_compressed_bytes) ||
1800 GETMEMB(dd.dd_phys, "dsl_dir_phys",
1801 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) {
1802 return (DCMD_ERR);
1803 }
1804
1805 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n",
1806 dd.dd_space_towrite[0] >> shift, suffix,
1807 dd.dd_space_towrite[1] >> shift, suffix,
1808 dd.dd_space_towrite[2] >> shift, suffix,
1809 dd.dd_space_towrite[3] >> shift, suffix);
1810
1811 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n",
1812 dsp.dd_used_bytes >> shift, suffix);
1813 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n",
1814 dsp.dd_compressed_bytes >> shift, suffix);
1815 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n",
1816 dsp.dd_uncompressed_bytes >> shift, suffix);
1817
1818 bzero(&sd, sizeof (sd));
1819 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) {
1820 mdb_warn("can't walk metaslabs");
1821 return (DCMD_ERR);
1822 }
1823
1824 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n",
1825 sd.ms_alloctree[0] >> shift, suffix,
1826 sd.ms_alloctree[1] >> shift, suffix,
1827 sd.ms_alloctree[2] >> shift, suffix,
1828 sd.ms_alloctree[3] >> shift, suffix);
1829 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n",
1830 sd.ms_freetree[0] >> shift, suffix,
1831 sd.ms_freetree[1] >> shift, suffix,
1832 sd.ms_freetree[2] >> shift, suffix,
1833 sd.ms_freetree[3] >> shift, suffix);
1834 mdb_printf("ms_tree = %llu%s\n", sd.ms_tree >> shift, suffix);
1835 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix);
1836 mdb_printf("current syncing avail = %llu%s\n",
1837 sd.nowavail >> shift, suffix);
1838
1839 return (DCMD_OK);
1840 }
1841
1842 typedef struct mdb_spa_aux_vdev {
1843 int sav_count;
1844 uintptr_t sav_vdevs;
1845 } mdb_spa_aux_vdev_t;
1846
1847 typedef struct mdb_spa_vdevs {
1848 uintptr_t spa_root_vdev;
1849 mdb_spa_aux_vdev_t spa_l2cache;
1850 mdb_spa_aux_vdev_t spa_spares;
1851 } mdb_spa_vdevs_t;
1852
1853 static int
1854 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v,
1855 const char *name)
1856 {
1857 uintptr_t *aux;
1858 size_t len;
1859 int ret, i;
1860
1861 /*
1862 * Iterate over aux vdevs and print those out as well. This is a
1863 * little annoying because we don't have a root vdev to pass to ::vdev.
1864 * Instead, we print a single line and then call it for each child
1865 * vdev.
1866 */
1867 if (sav->sav_count != 0) {
1868 v[1].a_type = MDB_TYPE_STRING;
1869 v[1].a_un.a_str = "-d";
1870 v[2].a_type = MDB_TYPE_IMMEDIATE;
1871 v[2].a_un.a_val = 2;
1872
1873 len = sav->sav_count * sizeof (uintptr_t);
1874 aux = mdb_alloc(len, UM_SLEEP);
1875 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) {
1876 mdb_free(aux, len);
1877 mdb_warn("failed to read l2cache vdevs at %p",
1878 sav->sav_vdevs);
1879 return (DCMD_ERR);
1880 }
1881
1882 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name);
1883
1884 for (i = 0; i < sav->sav_count; i++) {
1885 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v);
1886 if (ret != DCMD_OK) {
1887 mdb_free(aux, len);
1888 return (ret);
1889 }
1890 }
1891
1892 mdb_free(aux, len);
1893 }
1894
1895 return (0);
1896 }
1897
1898 /*
1899 * ::spa_vdevs
1900 *
1901 * -e Include error stats
1902 * -m Include metaslab information
1903 * -M Include metaslab group information
1904 * -h Include histogram information (requires -m or -M)
1905 *
1906 * Print out a summarized list of vdevs for the given spa_t.
1907 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as
1908 * iterating over the cache devices.
1909 */
1910 /* ARGSUSED */
1911 static int
1912 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1913 {
1914 mdb_arg_t v[3];
1915 int ret;
1916 char opts[100] = "-r";
1917 int spa_flags = 0;
1918
1919 if (mdb_getopts(argc, argv,
1920 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1921 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1922 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1923 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1924 NULL) != argc)
1925 return (DCMD_USAGE);
1926
1927 if (!(flags & DCMD_ADDRSPEC))
1928 return (DCMD_USAGE);
1929
1930 mdb_spa_vdevs_t spa;
1931 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1)
1932 return (DCMD_ERR);
1933
1934 /*
1935 * Unitialized spa_t structures can have a NULL root vdev.
1936 */
1937 if (spa.spa_root_vdev == NULL) {
1938 mdb_printf("no associated vdevs\n");
1939 return (DCMD_OK);
1940 }
1941
1942 if (spa_flags & SPA_FLAG_ERRORS)
1943 strcat(opts, "e");
1944 if (spa_flags & SPA_FLAG_METASLABS)
1945 strcat(opts, "m");
1946 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1947 strcat(opts, "M");
1948 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1949 strcat(opts, "h");
1950
1951 v[0].a_type = MDB_TYPE_STRING;
1952 v[0].a_un.a_str = opts;
1953
1954 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev,
1955 flags, 1, v);
1956 if (ret != DCMD_OK)
1957 return (ret);
1958
1959 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 ||
1960 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0)
1961 return (DCMD_ERR);
1962
1963 return (DCMD_OK);
1964 }
1965
1966 /*
1967 * ::zio
1968 *
1969 * Print a summary of zio_t and all its children. This is intended to display a
1970 * zio tree, and hence we only pick the most important pieces of information for
1971 * the main summary. More detailed information can always be found by doing a
1972 * '::print zio' on the underlying zio_t. The columns we display are:
1973 *
1974 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED
1975 *
1976 * The 'address' column is indented by one space for each depth level as we
1977 * descend down the tree.
1978 */
1979
1980 #define ZIO_MAXINDENT 7
1981 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT)
1982 #define ZIO_WALK_SELF 0
1983 #define ZIO_WALK_CHILD 1
1984 #define ZIO_WALK_PARENT 2
1985
1986 typedef struct zio_print_args {
1987 int zpa_current_depth;
1988 int zpa_min_depth;
1989 int zpa_max_depth;
1990 int zpa_type;
1991 uint_t zpa_flags;
1992 } zio_print_args_t;
1993
1994 typedef struct mdb_zio {
1995 enum zio_type io_type;
1996 enum zio_stage io_stage;
1997 uintptr_t io_waiter;
1998 uintptr_t io_spa;
1999 struct {
2000 struct {
2001 uintptr_t list_next;
2002 } list_head;
2003 } io_parent_list;
2004 int io_error;
2005 } mdb_zio_t;
2006
2007 typedef struct mdb_zio_timestamp {
2008 hrtime_t io_timestamp;
2009 } mdb_zio_timestamp_t;
2010
2011 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg);
2012
2013 static int
2014 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa)
2015 {
2016 mdb_ctf_id_t type_enum, stage_enum;
2017 int indent = zpa->zpa_current_depth;
2018 const char *type, *stage;
2019 uintptr_t laddr;
2020 mdb_zio_t zio;
2021 mdb_zio_timestamp_t zio_timestamp = { 0 };
2022
2023 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1)
2024 return (WALK_ERR);
2025 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio",
2026 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET);
2027
2028 if (indent > ZIO_MAXINDENT)
2029 indent = ZIO_MAXINDENT;
2030
2031 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 ||
2032 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) {
2033 mdb_warn("failed to lookup zio enums");
2034 return (WALK_ERR);
2035 }
2036
2037 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL)
2038 type += sizeof ("ZIO_TYPE_") - 1;
2039 else
2040 type = "?";
2041
2042 if (zio.io_error == 0) {
2043 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage);
2044 if (stage != NULL)
2045 stage += sizeof ("ZIO_STAGE_") - 1;
2046 else
2047 stage = "?";
2048 } else {
2049 stage = "FAILED";
2050 }
2051
2052 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) {
2053 if (zpa->zpa_flags & DCMD_PIPE_OUT) {
2054 mdb_printf("%?p\n", addr);
2055 } else {
2056 mdb_printf("%*s%-*p %-5s %-16s ", indent, "",
2057 ZIO_MAXWIDTH - indent, addr, type, stage);
2058 if (zio.io_waiter != 0)
2059 mdb_printf("%-16lx ", zio.io_waiter);
2060 else
2061 mdb_printf("%-16s ", "-");
2062 #ifdef _KERNEL
2063 if (zio_timestamp.io_timestamp != 0) {
2064 mdb_printf("%llums", (mdb_gethrtime() -
2065 zio_timestamp.io_timestamp) /
2066 1000000);
2067 } else {
2068 mdb_printf("%-12s ", "-");
2069 }
2070 #else
2071 mdb_printf("%-12s ", "-");
2072 #endif
2073 mdb_printf("\n");
2074 }
2075 }
2076
2077 if (zpa->zpa_current_depth >= zpa->zpa_max_depth)
2078 return (WALK_NEXT);
2079
2080 if (zpa->zpa_type == ZIO_WALK_PARENT)
2081 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2082 "io_parent_list");
2083 else
2084 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2085 "io_child_list");
2086
2087 zpa->zpa_current_depth++;
2088 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) {
2089 mdb_warn("failed to walk zio_t children at %p\n", laddr);
2090 return (WALK_ERR);
2091 }
2092 zpa->zpa_current_depth--;
2093
2094 return (WALK_NEXT);
2095 }
2096
2097 /* ARGSUSED */
2098 static int
2099 zio_child_cb(uintptr_t addr, const void *unknown, void *arg)
2100 {
2101 zio_link_t zl;
2102 uintptr_t ziop;
2103 zio_print_args_t *zpa = arg;
2104
2105 if (mdb_vread(&zl, sizeof (zl), addr) == -1) {
2106 mdb_warn("failed to read zio_link_t at %p", addr);
2107 return (WALK_ERR);
2108 }
2109
2110 if (zpa->zpa_type == ZIO_WALK_PARENT)
2111 ziop = (uintptr_t)zl.zl_parent;
2112 else
2113 ziop = (uintptr_t)zl.zl_child;
2114
2115 return (zio_print_cb(ziop, zpa));
2116 }
2117
2118 /* ARGSUSED */
2119 static int
2120 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2121 {
2122 zio_print_args_t zpa = { 0 };
2123
2124 if (!(flags & DCMD_ADDRSPEC))
2125 return (DCMD_USAGE);
2126
2127 if (mdb_getopts(argc, argv,
2128 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth,
2129 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type,
2130 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type,
2131 NULL) != argc)
2132 return (DCMD_USAGE);
2133
2134 zpa.zpa_flags = flags;
2135 if (zpa.zpa_max_depth != 0) {
2136 if (zpa.zpa_type == ZIO_WALK_SELF)
2137 zpa.zpa_type = ZIO_WALK_CHILD;
2138 } else if (zpa.zpa_type != ZIO_WALK_SELF) {
2139 zpa.zpa_min_depth = 1;
2140 zpa.zpa_max_depth = 1;
2141 }
2142
2143 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) {
2144 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n",
2145 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER",
2146 "TIME_ELAPSED");
2147 }
2148
2149 if (zio_print_cb(addr, &zpa) != WALK_NEXT)
2150 return (DCMD_ERR);
2151
2152 return (DCMD_OK);
2153 }
2154
2155 /*
2156 * [addr]::zio_state
2157 *
2158 * Print a summary of all zio_t structures on the system, or for a particular
2159 * pool. This is equivalent to '::walk zio_root | ::zio'.
2160 */
2161 /*ARGSUSED*/
2162 static int
2163 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2164 {
2165 /*
2166 * MDB will remember the last address of the pipeline, so if we don't
2167 * zero this we'll end up trying to walk zio structures for a
2168 * non-existent spa_t.
2169 */
2170 if (!(flags & DCMD_ADDRSPEC))
2171 addr = 0;
2172
2173 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr));
2174 }
2175
2176 typedef struct txg_list_walk_data {
2177 uintptr_t lw_head[TXG_SIZE];
2178 int lw_txgoff;
2179 int lw_maxoff;
2180 size_t lw_offset;
2181 void *lw_obj;
2182 } txg_list_walk_data_t;
2183
2184 static int
2185 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff)
2186 {
2187 txg_list_walk_data_t *lwd;
2188 txg_list_t list;
2189 int i;
2190
2191 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC);
2192 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) {
2193 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr);
2194 return (WALK_ERR);
2195 }
2196
2197 for (i = 0; i < TXG_SIZE; i++)
2198 lwd->lw_head[i] = (uintptr_t)list.tl_head[i];
2199 lwd->lw_offset = list.tl_offset;
2200 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t),
2201 UM_SLEEP | UM_GC);
2202 lwd->lw_txgoff = txg;
2203 lwd->lw_maxoff = maxoff;
2204
2205 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2206 wsp->walk_data = lwd;
2207
2208 return (WALK_NEXT);
2209 }
2210
2211 static int
2212 txg_list_walk_init(mdb_walk_state_t *wsp)
2213 {
2214 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1));
2215 }
2216
2217 static int
2218 txg_list0_walk_init(mdb_walk_state_t *wsp)
2219 {
2220 return (txg_list_walk_init_common(wsp, 0, 0));
2221 }
2222
2223 static int
2224 txg_list1_walk_init(mdb_walk_state_t *wsp)
2225 {
2226 return (txg_list_walk_init_common(wsp, 1, 1));
2227 }
2228
2229 static int
2230 txg_list2_walk_init(mdb_walk_state_t *wsp)
2231 {
2232 return (txg_list_walk_init_common(wsp, 2, 2));
2233 }
2234
2235 static int
2236 txg_list3_walk_init(mdb_walk_state_t *wsp)
2237 {
2238 return (txg_list_walk_init_common(wsp, 3, 3));
2239 }
2240
2241 static int
2242 txg_list_walk_step(mdb_walk_state_t *wsp)
2243 {
2244 txg_list_walk_data_t *lwd = wsp->walk_data;
2245 uintptr_t addr;
2246 txg_node_t *node;
2247 int status;
2248
2249 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) {
2250 lwd->lw_txgoff++;
2251 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2252 }
2253
2254 if (wsp->walk_addr == NULL)
2255 return (WALK_DONE);
2256
2257 addr = wsp->walk_addr - lwd->lw_offset;
2258
2259 if (mdb_vread(lwd->lw_obj,
2260 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) {
2261 mdb_warn("failed to read list element at %#lx", addr);
2262 return (WALK_ERR);
2263 }
2264
2265 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata);
2266 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset);
2267 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff];
2268
2269 return (status);
2270 }
2271
2272 /*
2273 * ::walk spa
2274 *
2275 * Walk all named spa_t structures in the namespace. This is nothing more than
2276 * a layered avl walk.
2277 */
2278 static int
2279 spa_walk_init(mdb_walk_state_t *wsp)
2280 {
2281 GElf_Sym sym;
2282
2283 if (wsp->walk_addr != NULL) {
2284 mdb_warn("spa walk only supports global walks\n");
2285 return (WALK_ERR);
2286 }
2287
2288 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) {
2289 mdb_warn("failed to find symbol 'spa_namespace_avl'");
2290 return (WALK_ERR);
2291 }
2292
2293 wsp->walk_addr = (uintptr_t)sym.st_value;
2294
2295 if (mdb_layered_walk("avl", wsp) == -1) {
2296 mdb_warn("failed to walk 'avl'\n");
2297 return (WALK_ERR);
2298 }
2299
2300 return (WALK_NEXT);
2301 }
2302
2303 static int
2304 spa_walk_step(mdb_walk_state_t *wsp)
2305 {
2306 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata));
2307 }
2308
2309 /*
2310 * [addr]::walk zio
2311 *
2312 * Walk all active zio_t structures on the system. This is simply a layered
2313 * walk on top of ::walk zio_cache, with the optional ability to limit the
2314 * structures to a particular pool.
2315 */
2316 static int
2317 zio_walk_init(mdb_walk_state_t *wsp)
2318 {
2319 wsp->walk_data = (void *)wsp->walk_addr;
2320
2321 if (mdb_layered_walk("zio_cache", wsp) == -1) {
2322 mdb_warn("failed to walk 'zio_cache'\n");
2323 return (WALK_ERR);
2324 }
2325
2326 return (WALK_NEXT);
2327 }
2328
2329 static int
2330 zio_walk_step(mdb_walk_state_t *wsp)
2331 {
2332 mdb_zio_t zio;
2333 uintptr_t spa = (uintptr_t)wsp->walk_data;
2334
2335 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2336 wsp->walk_addr, 0) == -1)
2337 return (WALK_ERR);
2338
2339 if (spa != 0 && spa != zio.io_spa)
2340 return (WALK_NEXT);
2341
2342 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2343 }
2344
2345 /*
2346 * [addr]::walk zio_root
2347 *
2348 * Walk only root zio_t structures, optionally for a particular spa_t.
2349 */
2350 static int
2351 zio_walk_root_step(mdb_walk_state_t *wsp)
2352 {
2353 mdb_zio_t zio;
2354 uintptr_t spa = (uintptr_t)wsp->walk_data;
2355
2356 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2357 wsp->walk_addr, 0) == -1)
2358 return (WALK_ERR);
2359
2360 if (spa != 0 && spa != zio.io_spa)
2361 return (WALK_NEXT);
2362
2363 /* If the parent list is not empty, ignore */
2364 if (zio.io_parent_list.list_head.list_next !=
2365 wsp->walk_addr +
2366 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") +
2367 mdb_ctf_offsetof_by_name("struct list", "list_head"))
2368 return (WALK_NEXT);
2369
2370 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2371 }
2372
2373 /*
2374 * ::zfs_blkstats
2375 *
2376 * -v print verbose per-level information
2377 *
2378 */
2379 static int
2380 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2381 {
2382 boolean_t verbose = B_FALSE;
2383 zfs_all_blkstats_t stats;
2384 dmu_object_type_t t;
2385 zfs_blkstat_t *tzb;
2386 uint64_t ditto;
2387 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10];
2388 /* +10 in case it grew */
2389
2390 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) {
2391 mdb_warn("failed to read 'dmu_ot'");
2392 return (DCMD_ERR);
2393 }
2394
2395 if (mdb_getopts(argc, argv,
2396 'v', MDB_OPT_SETBITS, TRUE, &verbose,
2397 NULL) != argc)
2398 return (DCMD_USAGE);
2399
2400 if (!(flags & DCMD_ADDRSPEC))
2401 return (DCMD_USAGE);
2402
2403 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) ||
2404 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) ||
2405 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) {
2406 mdb_warn("failed to read data at %p;", addr);
2407 mdb_printf("maybe no stats? run \"zpool scrub\" first.");
2408 return (DCMD_ERR);
2409 }
2410
2411 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL];
2412 if (tzb->zb_gangs != 0) {
2413 mdb_printf("Ganged blocks: %llu\n",
2414 (longlong_t)tzb->zb_gangs);
2415 }
2416
2417 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev +
2418 tzb->zb_ditto_3_of_3_samevdev;
2419 if (ditto != 0) {
2420 mdb_printf("Dittoed blocks on same vdev: %llu\n",
2421 (longlong_t)ditto);
2422 }
2423
2424 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2425 "\t avg\t comp\t%%Total\tType\n");
2426
2427 for (t = 0; t <= DMU_OT_TOTAL; t++) {
2428 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN];
2429 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN];
2430 char avg[NICENUM_BUFLEN];
2431 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN];
2432 char typename[64];
2433 int l;
2434
2435
2436 if (t == DMU_OT_DEFERRED)
2437 strcpy(typename, "deferred free");
2438 else if (t == DMU_OT_OTHER)
2439 strcpy(typename, "other");
2440 else if (t == DMU_OT_TOTAL)
2441 strcpy(typename, "Total");
2442 else if (mdb_readstr(typename, sizeof (typename),
2443 (uintptr_t)dmu_ot[t].ot_name) == -1) {
2444 mdb_warn("failed to read type name");
2445 return (DCMD_ERR);
2446 }
2447
2448 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0)
2449 continue;
2450
2451 for (l = -1; l < DN_MAX_LEVELS; l++) {
2452 int level = (l == -1 ? DN_MAX_LEVELS : l);
2453 zfs_blkstat_t *zb = &stats.zab_type[level][t];
2454
2455 if (zb->zb_asize == 0)
2456 continue;
2457
2458 /*
2459 * Don't print each level unless requested.
2460 */
2461 if (!verbose && level != DN_MAX_LEVELS)
2462 continue;
2463
2464 /*
2465 * If all the space is level 0, don't print the
2466 * level 0 separately.
2467 */
2468 if (level == 0 && zb->zb_asize ==
2469 stats.zab_type[DN_MAX_LEVELS][t].zb_asize)
2470 continue;
2471
2472 mdb_nicenum(zb->zb_count, csize);
2473 mdb_nicenum(zb->zb_lsize, lsize);
2474 mdb_nicenum(zb->zb_psize, psize);
2475 mdb_nicenum(zb->zb_asize, asize);
2476 mdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2477 (void) snprintfrac(comp, NICENUM_BUFLEN,
2478 zb->zb_lsize, zb->zb_psize, 2);
2479 (void) snprintfrac(pct, NICENUM_BUFLEN,
2480 100 * zb->zb_asize, tzb->zb_asize, 2);
2481
2482 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s"
2483 "\t%5s\t%6s\t",
2484 csize, lsize, psize, asize, avg, comp, pct);
2485
2486 if (level == DN_MAX_LEVELS)
2487 mdb_printf("%s\n", typename);
2488 else
2489 mdb_printf(" L%d %s\n",
2490 level, typename);
2491 }
2492 }
2493
2494 return (DCMD_OK);
2495 }
2496
2497 typedef struct mdb_reference {
2498 uintptr_t ref_holder;
2499 uintptr_t ref_removed;
2500 uint64_t ref_number;
2501 } mdb_reference_t;
2502
2503 /* ARGSUSED */
2504 static int
2505 reference_cb(uintptr_t addr, const void *ignored, void *arg)
2506 {
2507 mdb_reference_t ref;
2508 boolean_t holder_is_str = B_FALSE;
2509 char holder_str[128];
2510 boolean_t removed = (boolean_t)arg;
2511
2512 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr,
2513 0) == -1)
2514 return (DCMD_ERR);
2515
2516 if (mdb_readstr(holder_str, sizeof (holder_str),
2517 ref.ref_holder) != -1)
2518 holder_is_str = strisprint(holder_str);
2519
2520 if (removed)
2521 mdb_printf("removed ");
2522 mdb_printf("reference ");
2523 if (ref.ref_number != 1)
2524 mdb_printf("with count=%llu ", ref.ref_number);
2525 mdb_printf("with tag %lx", ref.ref_holder);
2526 if (holder_is_str)
2527 mdb_printf(" \"%s\"", holder_str);
2528 mdb_printf(", held at:\n");
2529
2530 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
2531
2532 if (removed) {
2533 mdb_printf("removed at:\n");
2534 (void) mdb_call_dcmd("whatis", ref.ref_removed,
2535 DCMD_ADDRSPEC, 0, NULL);
2536 }
2537
2538 mdb_printf("\n");
2539
2540 return (WALK_NEXT);
2541 }
2542
2543 typedef struct mdb_refcount {
2544 uint64_t rc_count;
2545 } mdb_refcount_t;
2546
2547 typedef struct mdb_refcount_removed {
2548 uint64_t rc_removed_count;
2549 } mdb_refcount_removed_t;
2550
2551 typedef struct mdb_refcount_tracked {
2552 boolean_t rc_tracked;
2553 } mdb_refcount_tracked_t;
2554
2555 /* ARGSUSED */
2556 static int
2557 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2558 {
2559 mdb_refcount_t rc;
2560 mdb_refcount_removed_t rcr;
2561 mdb_refcount_tracked_t rct;
2562 int off;
2563 boolean_t released = B_FALSE;
2564
2565 if (!(flags & DCMD_ADDRSPEC))
2566 return (DCMD_USAGE);
2567
2568 if (mdb_getopts(argc, argv,
2569 'r', MDB_OPT_SETBITS, B_TRUE, &released,
2570 NULL) != argc)
2571 return (DCMD_USAGE);
2572
2573 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr,
2574 0) == -1)
2575 return (DCMD_ERR);
2576
2577 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr,
2578 MDB_CTF_VREAD_QUIET) == -1) {
2579 mdb_printf("refcount_t at %p has %llu holds (untracked)\n",
2580 addr, (longlong_t)rc.rc_count);
2581 return (DCMD_OK);
2582 }
2583
2584 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr,
2585 MDB_CTF_VREAD_QUIET) == -1) {
2586 /* If this is an old target, it might be tracked. */
2587 rct.rc_tracked = B_TRUE;
2588 }
2589
2590 mdb_printf("refcount_t at %p has %llu current holds, "
2591 "%llu recently released holds\n",
2592 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count);
2593
2594 if (rct.rc_tracked && rc.rc_count > 0)
2595 mdb_printf("current holds:\n");
2596 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list");
2597 if (off == -1)
2598 return (DCMD_ERR);
2599 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off);
2600
2601 if (released && rcr.rc_removed_count > 0) {
2602 mdb_printf("released holds:\n");
2603
2604 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed");
2605 if (off == -1)
2606 return (DCMD_ERR);
2607 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off);
2608 }
2609
2610 return (DCMD_OK);
2611 }
2612
2613 /* ARGSUSED */
2614 static int
2615 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2616 {
2617 sa_attr_table_t *table;
2618 sa_os_t sa_os;
2619 char *name;
2620 int i;
2621
2622 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) {
2623 mdb_warn("failed to read sa_os at %p", addr);
2624 return (DCMD_ERR);
2625 }
2626
2627 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2628 UM_SLEEP | UM_GC);
2629 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC);
2630
2631 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2632 (uintptr_t)sa_os.sa_attr_table) == -1) {
2633 mdb_warn("failed to read sa_os at %p", addr);
2634 return (DCMD_ERR);
2635 }
2636
2637 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n",
2638 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME");
2639 for (i = 0; i != sa_os.sa_num_attrs; i++) {
2640 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name);
2641 mdb_printf("%5x %8x %8x %8x %-s\n",
2642 (int)table[i].sa_attr, (int)table[i].sa_registered,
2643 (int)table[i].sa_length, table[i].sa_byteswap, name);
2644 }
2645
2646 return (DCMD_OK);
2647 }
2648
2649 static int
2650 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count)
2651 {
2652 uintptr_t idx_table;
2653
2654 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) {
2655 mdb_printf("can't find offset table in sa_idx_tab\n");
2656 return (-1);
2657 }
2658
2659 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t),
2660 UM_SLEEP | UM_GC);
2661
2662 if (mdb_vread(*off_tab,
2663 attr_count * sizeof (uint32_t), idx_table) == -1) {
2664 mdb_warn("failed to attribute offset table %p", idx_table);
2665 return (-1);
2666 }
2667
2668 return (DCMD_OK);
2669 }
2670
2671 /*ARGSUSED*/
2672 static int
2673 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2674 {
2675 uint32_t *offset_tab;
2676 int attr_count;
2677 uint64_t attr_id;
2678 uintptr_t attr_addr;
2679 uintptr_t bonus_tab, spill_tab;
2680 uintptr_t db_bonus, db_spill;
2681 uintptr_t os, os_sa;
2682 uintptr_t db_data;
2683
2684 if (argc != 1)
2685 return (DCMD_USAGE);
2686
2687 if (argv[0].a_type == MDB_TYPE_STRING)
2688 attr_id = mdb_strtoull(argv[0].a_un.a_str);
2689 else
2690 return (DCMD_USAGE);
2691
2692 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) ||
2693 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) ||
2694 GETMEMB(addr, "sa_handle", sa_os, os) ||
2695 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) ||
2696 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) {
2697 mdb_printf("Can't find necessary information in sa_handle "
2698 "in sa_handle\n");
2699 return (DCMD_ERR);
2700 }
2701
2702 if (GETMEMB(os, "objset", os_sa, os_sa)) {
2703 mdb_printf("Can't find os_sa in objset\n");
2704 return (DCMD_ERR);
2705 }
2706
2707 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) {
2708 mdb_printf("Can't find sa_num_attrs\n");
2709 return (DCMD_ERR);
2710 }
2711
2712 if (attr_id > attr_count) {
2713 mdb_printf("attribute id number is out of range\n");
2714 return (DCMD_ERR);
2715 }
2716
2717 if (bonus_tab) {
2718 if (sa_get_off_table(bonus_tab, &offset_tab,
2719 attr_count) == -1) {
2720 return (DCMD_ERR);
2721 }
2722
2723 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) {
2724 mdb_printf("can't find db_data in bonus dbuf\n");
2725 return (DCMD_ERR);
2726 }
2727 }
2728
2729 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) &&
2730 spill_tab == NULL) {
2731 mdb_printf("Attribute does not exist\n");
2732 return (DCMD_ERR);
2733 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) {
2734 if (sa_get_off_table(spill_tab, &offset_tab,
2735 attr_count) == -1) {
2736 return (DCMD_ERR);
2737 }
2738 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) {
2739 mdb_printf("can't find db_data in spill dbuf\n");
2740 return (DCMD_ERR);
2741 }
2742 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) {
2743 mdb_printf("Attribute does not exist\n");
2744 return (DCMD_ERR);
2745 }
2746 }
2747 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]);
2748 mdb_printf("%p\n", attr_addr);
2749 return (DCMD_OK);
2750 }
2751
2752 /* ARGSUSED */
2753 static int
2754 zfs_ace_print_common(uintptr_t addr, uint_t flags,
2755 uint64_t id, uint32_t access_mask, uint16_t ace_flags,
2756 uint16_t ace_type, int verbose)
2757 {
2758 if (DCMD_HDRSPEC(flags) && !verbose)
2759 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n",
2760 "ADDR", "FLAGS", "MASK", "TYPE", "ID");
2761
2762 if (!verbose) {
2763 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr,
2764 ace_flags, access_mask, ace_type, id);
2765 return (DCMD_OK);
2766 }
2767
2768 switch (ace_flags & ACE_TYPE_FLAGS) {
2769 case ACE_OWNER:
2770 mdb_printf("owner@:");
2771 break;
2772 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
2773 mdb_printf("group@:");
2774 break;
2775 case ACE_EVERYONE:
2776 mdb_printf("everyone@:");
2777 break;
2778 case ACE_IDENTIFIER_GROUP:
2779 mdb_printf("group:%llx:", (u_longlong_t)id);
2780 break;
2781 case 0: /* User entry */
2782 mdb_printf("user:%llx:", (u_longlong_t)id);
2783 break;
2784 }
2785
2786 /* print out permission mask */
2787 if (access_mask & ACE_READ_DATA)
2788 mdb_printf("r");
2789 else
2790 mdb_printf("-");
2791 if (access_mask & ACE_WRITE_DATA)
2792 mdb_printf("w");
2793 else
2794 mdb_printf("-");
2795 if (access_mask & ACE_EXECUTE)
2796 mdb_printf("x");
2797 else
2798 mdb_printf("-");
2799 if (access_mask & ACE_APPEND_DATA)
2800 mdb_printf("p");
2801 else
2802 mdb_printf("-");
2803 if (access_mask & ACE_DELETE)
2804 mdb_printf("d");
2805 else
2806 mdb_printf("-");
2807 if (access_mask & ACE_DELETE_CHILD)
2808 mdb_printf("D");
2809 else
2810 mdb_printf("-");
2811 if (access_mask & ACE_READ_ATTRIBUTES)
2812 mdb_printf("a");
2813 else
2814 mdb_printf("-");
2815 if (access_mask & ACE_WRITE_ATTRIBUTES)
2816 mdb_printf("A");
2817 else
2818 mdb_printf("-");
2819 if (access_mask & ACE_READ_NAMED_ATTRS)
2820 mdb_printf("R");
2821 else
2822 mdb_printf("-");
2823 if (access_mask & ACE_WRITE_NAMED_ATTRS)
2824 mdb_printf("W");
2825 else
2826 mdb_printf("-");
2827 if (access_mask & ACE_READ_ACL)
2828 mdb_printf("c");
2829 else
2830 mdb_printf("-");
2831 if (access_mask & ACE_WRITE_ACL)
2832 mdb_printf("C");
2833 else
2834 mdb_printf("-");
2835 if (access_mask & ACE_WRITE_OWNER)
2836 mdb_printf("o");
2837 else
2838 mdb_printf("-");
2839 if (access_mask & ACE_SYNCHRONIZE)
2840 mdb_printf("s");
2841 else
2842 mdb_printf("-");
2843
2844 mdb_printf(":");
2845
2846 /* Print out inheritance flags */
2847 if (ace_flags & ACE_FILE_INHERIT_ACE)
2848 mdb_printf("f");
2849 else
2850 mdb_printf("-");
2851 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE)
2852 mdb_printf("d");
2853 else
2854 mdb_printf("-");
2855 if (ace_flags & ACE_INHERIT_ONLY_ACE)
2856 mdb_printf("i");
2857 else
2858 mdb_printf("-");
2859 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE)
2860 mdb_printf("n");
2861 else
2862 mdb_printf("-");
2863 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)
2864 mdb_printf("S");
2865 else
2866 mdb_printf("-");
2867 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG)
2868 mdb_printf("F");
2869 else
2870 mdb_printf("-");
2871 if (ace_flags & ACE_INHERITED_ACE)
2872 mdb_printf("I");
2873 else
2874 mdb_printf("-");
2875
2876 switch (ace_type) {
2877 case ACE_ACCESS_ALLOWED_ACE_TYPE:
2878 mdb_printf(":allow\n");
2879 break;
2880 case ACE_ACCESS_DENIED_ACE_TYPE:
2881 mdb_printf(":deny\n");
2882 break;
2883 case ACE_SYSTEM_AUDIT_ACE_TYPE:
2884 mdb_printf(":audit\n");
2885 break;
2886 case ACE_SYSTEM_ALARM_ACE_TYPE:
2887 mdb_printf(":alarm\n");
2888 break;
2889 default:
2890 mdb_printf(":?\n");
2891 }
2892 return (DCMD_OK);
2893 }
2894
2895 /* ARGSUSED */
2896 static int
2897 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2898 {
2899 zfs_ace_t zace;
2900 int verbose = FALSE;
2901 uint64_t id;
2902
2903 if (!(flags & DCMD_ADDRSPEC))
2904 return (DCMD_USAGE);
2905
2906 if (mdb_getopts(argc, argv,
2907 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2908 return (DCMD_USAGE);
2909
2910 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) {
2911 mdb_warn("failed to read zfs_ace_t");
2912 return (DCMD_ERR);
2913 }
2914
2915 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 ||
2916 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2917 id = zace.z_fuid;
2918 else
2919 id = -1;
2920
2921 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask,
2922 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose));
2923 }
2924
2925 /* ARGSUSED */
2926 static int
2927 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2928 {
2929 ace_t ace;
2930 uint64_t id;
2931 int verbose = FALSE;
2932
2933 if (!(flags & DCMD_ADDRSPEC))
2934 return (DCMD_USAGE);
2935
2936 if (mdb_getopts(argc, argv,
2937 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2938 return (DCMD_USAGE);
2939
2940 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) {
2941 mdb_warn("failed to read ace_t");
2942 return (DCMD_ERR);
2943 }
2944
2945 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 ||
2946 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2947 id = ace.a_who;
2948 else
2949 id = -1;
2950
2951 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask,
2952 ace.a_flags, ace.a_type, verbose));
2953 }
2954
2955 typedef struct acl_dump_args {
2956 int a_argc;
2957 const mdb_arg_t *a_argv;
2958 uint16_t a_version;
2959 int a_flags;
2960 } acl_dump_args_t;
2961
2962 /* ARGSUSED */
2963 static int
2964 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg)
2965 {
2966 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2967
2968 if (acl_args->a_version == 1) {
2969 if (mdb_call_dcmd("zfs_ace", addr,
2970 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2971 acl_args->a_argv) != DCMD_OK) {
2972 return (WALK_ERR);
2973 }
2974 } else {
2975 if (mdb_call_dcmd("zfs_ace0", addr,
2976 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2977 acl_args->a_argv) != DCMD_OK) {
2978 return (WALK_ERR);
2979 }
2980 }
2981 acl_args->a_flags = DCMD_LOOP;
2982 return (WALK_NEXT);
2983 }
2984
2985 /* ARGSUSED */
2986 static int
2987 acl_cb(uintptr_t addr, const void *unknown, void *arg)
2988 {
2989 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2990
2991 if (acl_args->a_version == 1) {
2992 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb,
2993 arg, addr) != 0) {
2994 mdb_warn("can't walk ACEs");
2995 return (DCMD_ERR);
2996 }
2997 } else {
2998 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb,
2999 arg, addr) != 0) {
3000 mdb_warn("can't walk ACEs");
3001 return (DCMD_ERR);
3002 }
3003 }
3004 return (WALK_NEXT);
3005 }
3006
3007 /* ARGSUSED */
3008 static int
3009 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3010 {
3011 zfs_acl_t zacl;
3012 int verbose = FALSE;
3013 acl_dump_args_t acl_args;
3014
3015 if (!(flags & DCMD_ADDRSPEC))
3016 return (DCMD_USAGE);
3017
3018 if (mdb_getopts(argc, argv,
3019 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3020 return (DCMD_USAGE);
3021
3022 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) {
3023 mdb_warn("failed to read zfs_acl_t");
3024 return (DCMD_ERR);
3025 }
3026
3027 acl_args.a_argc = argc;
3028 acl_args.a_argv = argv;
3029 acl_args.a_version = zacl.z_version;
3030 acl_args.a_flags = DCMD_LOOPFIRST;
3031
3032 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) {
3033 mdb_warn("can't walk ACL");
3034 return (DCMD_ERR);
3035 }
3036
3037 return (DCMD_OK);
3038 }
3039
3040 /* ARGSUSED */
3041 static int
3042 zfs_acl_node_walk_init(mdb_walk_state_t *wsp)
3043 {
3044 if (wsp->walk_addr == NULL) {
3045 mdb_warn("must supply address of zfs_acl_node_t\n");
3046 return (WALK_ERR);
3047 }
3048
3049 wsp->walk_addr +=
3050 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl");
3051
3052 if (mdb_layered_walk("list", wsp) == -1) {
3053 mdb_warn("failed to walk 'list'\n");
3054 return (WALK_ERR);
3055 }
3056
3057 return (WALK_NEXT);
3058 }
3059
3060 static int
3061 zfs_acl_node_walk_step(mdb_walk_state_t *wsp)
3062 {
3063 zfs_acl_node_t aclnode;
3064
3065 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t),
3066 wsp->walk_addr) == -1) {
3067 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr);
3068 return (WALK_ERR);
3069 }
3070
3071 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata));
3072 }
3073
3074 typedef struct ace_walk_data {
3075 int ace_count;
3076 int ace_version;
3077 } ace_walk_data_t;
3078
3079 static int
3080 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version,
3081 int ace_count, uintptr_t ace_data)
3082 {
3083 ace_walk_data_t *ace_walk_data;
3084
3085 if (wsp->walk_addr == NULL) {
3086 mdb_warn("must supply address of zfs_acl_node_t\n");
3087 return (WALK_ERR);
3088 }
3089
3090 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC);
3091
3092 ace_walk_data->ace_count = ace_count;
3093 ace_walk_data->ace_version = version;
3094
3095 wsp->walk_addr = ace_data;
3096 wsp->walk_data = ace_walk_data;
3097
3098 return (WALK_NEXT);
3099 }
3100
3101 static int
3102 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version)
3103 {
3104 static int gotid;
3105 static mdb_ctf_id_t acl_id;
3106 int z_ace_count;
3107 uintptr_t z_acldata;
3108
3109 if (!gotid) {
3110 if (mdb_ctf_lookup_by_name("struct zfs_acl_node",
3111 &acl_id) == -1) {
3112 mdb_warn("couldn't find struct zfs_acl_node");
3113 return (DCMD_ERR);
3114 }
3115 gotid = TRUE;
3116 }
3117
3118 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) {
3119 return (DCMD_ERR);
3120 }
3121 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) {
3122 return (DCMD_ERR);
3123 }
3124
3125 return (zfs_aces_walk_init_common(wsp, version,
3126 z_ace_count, z_acldata));
3127 }
3128
3129 /* ARGSUSED */
3130 static int
3131 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp)
3132 {
3133 return (zfs_acl_node_aces_walk_init_common(wsp, 1));
3134 }
3135
3136 /* ARGSUSED */
3137 static int
3138 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp)
3139 {
3140 return (zfs_acl_node_aces_walk_init_common(wsp, 0));
3141 }
3142
3143 static int
3144 zfs_aces_walk_step(mdb_walk_state_t *wsp)
3145 {
3146 ace_walk_data_t *ace_data = wsp->walk_data;
3147 zfs_ace_t zace;
3148 ace_t *acep;
3149 int status;
3150 int entry_type;
3151 int allow_type;
3152 uintptr_t ptr;
3153
3154 if (ace_data->ace_count == 0)
3155 return (WALK_DONE);
3156
3157 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) {
3158 mdb_warn("failed to read zfs_ace_t at %#lx",
3159 wsp->walk_addr);
3160 return (WALK_ERR);
3161 }
3162
3163 switch (ace_data->ace_version) {
3164 case 0:
3165 acep = (ace_t *)&zace;
3166 entry_type = acep->a_flags & ACE_TYPE_FLAGS;
3167 allow_type = acep->a_type;
3168 break;
3169 case 1:
3170 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS;
3171 allow_type = zace.z_hdr.z_type;
3172 break;
3173 default:
3174 return (WALK_ERR);
3175 }
3176
3177 ptr = (uintptr_t)wsp->walk_addr;
3178 switch (entry_type) {
3179 case ACE_OWNER:
3180 case ACE_EVERYONE:
3181 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
3182 ptr += ace_data->ace_version == 0 ?
3183 sizeof (ace_t) : sizeof (zfs_ace_hdr_t);
3184 break;
3185 case ACE_IDENTIFIER_GROUP:
3186 default:
3187 switch (allow_type) {
3188 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
3189 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
3190 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
3191 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
3192 ptr += ace_data->ace_version == 0 ?
3193 sizeof (ace_t) : sizeof (zfs_object_ace_t);
3194 break;
3195 default:
3196 ptr += ace_data->ace_version == 0 ?
3197 sizeof (ace_t) : sizeof (zfs_ace_t);
3198 break;
3199 }
3200 }
3201
3202 ace_data->ace_count--;
3203 status = wsp->walk_callback(wsp->walk_addr,
3204 (void *)(uintptr_t)&zace, wsp->walk_cbdata);
3205
3206 wsp->walk_addr = ptr;
3207 return (status);
3208 }
3209
3210 typedef struct mdb_zfs_rrwlock {
3211 uintptr_t rr_writer;
3212 boolean_t rr_writer_wanted;
3213 } mdb_zfs_rrwlock_t;
3214
3215 static uint_t rrw_key;
3216
3217 /* ARGSUSED */
3218 static int
3219 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3220 {
3221 mdb_zfs_rrwlock_t rrw;
3222
3223 if (rrw_key == 0) {
3224 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1)
3225 return (DCMD_ERR);
3226 }
3227
3228 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr,
3229 0) == -1)
3230 return (DCMD_ERR);
3231
3232 if (rrw.rr_writer != 0) {
3233 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer);
3234 return (DCMD_OK);
3235 }
3236
3237 if (rrw.rr_writer_wanted) {
3238 mdb_printf("writer wanted\n");
3239 }
3240
3241 mdb_printf("anonymous references:\n");
3242 (void) mdb_call_dcmd("refcount", addr +
3243 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"),
3244 DCMD_ADDRSPEC, 0, NULL);
3245
3246 mdb_printf("linked references:\n");
3247 (void) mdb_call_dcmd("refcount", addr +
3248 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"),
3249 DCMD_ADDRSPEC, 0, NULL);
3250
3251 /*
3252 * XXX This should find references from
3253 * "::walk thread | ::tsd -v <rrw_key>", but there is no support
3254 * for programmatic consumption of dcmds, so this would be
3255 * difficult, potentially requiring reimplementing ::tsd (both
3256 * user and kernel versions) in this MDB module.
3257 */
3258
3259 return (DCMD_OK);
3260 }
3261
3262 /*
3263 * MDB module linkage information:
3264 *
3265 * We declare a list of structures describing our dcmds, and a function
3266 * named _mdb_init to return a pointer to our module information.
3267 */
3268
3269 static const mdb_dcmd_t dcmds[] = {
3270 { "arc", "[-bkmg]", "print ARC variables", arc_print },
3271 { "blkptr", ":", "print blkptr_t", blkptr },
3272 { "dbuf", ":", "print dmu_buf_impl_t", dbuf },
3273 { "dbuf_stats", ":", "dbuf stats", dbuf_stats },
3274 { "dbufs",
3275 "\t[-O objset_t*] [-n objset_name | \"mos\"] "
3276 "[-o object | \"mdn\"] \n"
3277 "\t[-l level] [-b blkid | \"bonus\"]",
3278 "find dmu_buf_impl_t's that match specified criteria", dbufs },
3279 { "abuf_find", "dva_word[0] dva_word[1]",
3280 "find arc_buf_hdr_t of a specified DVA",
3281 abuf_find },
3282 { "spa", "?[-cevmMh]\n"
3283 "\t-c display spa config\n"
3284 "\t-e display vdev statistics\n"
3285 "\t-v display vdev information\n"
3286 "\t-m display metaslab statistics\n"
3287 "\t-M display metaslab group statistics\n"
3288 "\t-h display histogram (requires -m or -M)\n",
3289 "spa_t summary", spa_print },
3290 { "spa_config", ":", "print spa_t configuration", spa_print_config },
3291 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space },
3292 { "spa_vdevs", ":[-emMh]\n"
3293 "\t-e display vdev statistics\n"
3294 "\t-m dispaly metaslab statistics\n"
3295 "\t-M display metaslab group statistic\n"
3296 "\t-h display histogram (requires -m or -M)\n",
3297 "given a spa_t, print vdev summary", spa_vdevs },
3298 { "vdev", ":[-re]\n"
3299 "\t-r display recursively\n"
3300 "\t-e display statistics\n"
3301 "\t-m display metaslab statistics\n"
3302 "\t-M display metaslab group statistics\n"
3303 "\t-h display histogram (requires -m or -M)\n",
3304 "vdev_t summary", vdev_print },
3305 { "zio", ":[-cpr]\n"
3306 "\t-c display children\n"
3307 "\t-p display parents\n"
3308 "\t-r display recursively",
3309 "zio_t summary", zio_print },
3310 { "zio_state", "?", "print out all zio_t structures on system or "
3311 "for a particular pool", zio_state },
3312 { "zfs_blkstats", ":[-v]",
3313 "given a spa_t, print block type stats from last scrub",
3314 zfs_blkstats },
3315 { "zfs_params", "", "print zfs tunable parameters", zfs_params },
3316 { "refcount", ":[-r]\n"
3317 "\t-r display recently removed references",
3318 "print refcount_t holders", refcount },
3319 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf },
3320 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t",
3321 zfs_acl_dump },
3322 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print },
3323 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print },
3324 { "sa_attr_table", ":", "print SA attribute table from sa_os_t",
3325 sa_attr_table},
3326 { "sa_attr", ": attr_id",
3327 "print SA attribute address when given sa_handle_t", sa_attr_print},
3328 { "zfs_dbgmsg", ":[-va]",
3329 "print zfs debug log", dbgmsg},
3330 { "rrwlock", ":",
3331 "print rrwlock_t, including readers", rrwlock},
3332 { NULL }
3333 };
3334
3335 static const mdb_walker_t walkers[] = {
3336 { "zms_freelist", "walk ZFS metaslab freelist",
3337 freelist_walk_init, freelist_walk_step, NULL },
3338 { "txg_list", "given any txg_list_t *, walk all entries in all txgs",
3339 txg_list_walk_init, txg_list_walk_step, NULL },
3340 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0",
3341 txg_list0_walk_init, txg_list_walk_step, NULL },
3342 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1",
3343 txg_list1_walk_init, txg_list_walk_step, NULL },
3344 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2",
3345 txg_list2_walk_init, txg_list_walk_step, NULL },
3346 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3",
3347 txg_list3_walk_init, txg_list_walk_step, NULL },
3348 { "zio", "walk all zio structures, optionally for a particular spa_t",
3349 zio_walk_init, zio_walk_step, NULL },
3350 { "zio_root",
3351 "walk all root zio_t structures, optionally for a particular spa_t",
3352 zio_walk_init, zio_walk_root_step, NULL },
3353 { "spa", "walk all spa_t entries in the namespace",
3354 spa_walk_init, spa_walk_step, NULL },
3355 { "metaslab", "given a spa_t *, walk all metaslab_t structures",
3356 metaslab_walk_init, metaslab_walk_step, NULL },
3357 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes",
3358 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL },
3359 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs",
3360 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL },
3361 { "zfs_acl_node_aces0",
3362 "given a zfs_acl_node_t, walk all ACEs as ace_t",
3363 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL },
3364 { NULL }
3365 };
3366
3367 static const mdb_modinfo_t modinfo = {
3368 MDB_API_VERSION, dcmds, walkers
3369 };
3370
3371 const mdb_modinfo_t *
3372 _mdb_init(void)
3373 {
3374 return (&modinfo);
3375 }