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) 2011, 2016 by Delphix. All rights reserved.
25 * Copyright (c) 2017, Joyent, Inc. All rights reserved.
26 */
27
28 /* Portions Copyright 2010 Robert Milkowski */
29
30 #include <mdb/mdb_ctf.h>
31 #include <sys/zfs_context.h>
32 #include <sys/mdb_modapi.h>
33 #include <sys/dbuf.h>
34 #include <sys/dmu_objset.h>
35 #include <sys/dsl_dir.h>
36 #include <sys/dsl_pool.h>
37 #include <sys/metaslab_impl.h>
38 #include <sys/space_map.h>
39 #include <sys/list.h>
40 #include <sys/vdev_impl.h>
41 #include <sys/zap_leaf.h>
42 #include <sys/zap_impl.h>
43 #include <ctype.h>
44 #include <sys/zfs_acl.h>
45 #include <sys/sa_impl.h>
46 #include <sys/multilist.h>
47
48 #ifdef _KERNEL
49 #define ZFS_OBJ_NAME "zfs"
50 extern int64_t mdb_gethrtime(void);
51 #else
52 #define ZFS_OBJ_NAME "libzpool.so.1"
53 #endif
54
55 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`"
56
57 #ifndef _KERNEL
58 int aok;
59 #endif
60
61 enum spa_flags {
62 SPA_FLAG_CONFIG = 1 << 0,
63 SPA_FLAG_VDEVS = 1 << 1,
64 SPA_FLAG_ERRORS = 1 << 2,
65 SPA_FLAG_METASLAB_GROUPS = 1 << 3,
66 SPA_FLAG_METASLABS = 1 << 4,
67 SPA_FLAG_HISTOGRAMS = 1 << 5
68 };
69
70 /*
71 * If any of these flags are set, call spa_vdevs in spa_print
72 */
73 #define SPA_FLAG_ALL_VDEV \
74 (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \
75 SPA_FLAG_METASLABS)
76
77 static int
78 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp,
79 const char *member, int len, void *buf)
80 {
81 mdb_ctf_id_t id;
82 ulong_t off;
83 char name[64];
84
85 if (idp == NULL) {
86 if (mdb_ctf_lookup_by_name(type, &id) == -1) {
87 mdb_warn("couldn't find type %s", type);
88 return (DCMD_ERR);
89 }
90 idp = &id;
91 } else {
92 type = name;
93 mdb_ctf_type_name(*idp, name, sizeof (name));
94 }
95
96 if (mdb_ctf_offsetof(*idp, member, &off) == -1) {
97 mdb_warn("couldn't find member %s of type %s\n", member, type);
98 return (DCMD_ERR);
99 }
100 if (off % 8 != 0) {
101 mdb_warn("member %s of type %s is unsupported bitfield",
102 member, type);
103 return (DCMD_ERR);
104 }
105 off /= 8;
106
107 if (mdb_vread(buf, len, addr + off) == -1) {
108 mdb_warn("failed to read %s from %s at %p",
109 member, type, addr + off);
110 return (DCMD_ERR);
111 }
112 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */
113
114 return (0);
115 }
116
117 #define GETMEMB(addr, structname, member, dest) \
118 getmember(addr, ZFS_STRUCT structname, NULL, #member, \
119 sizeof (dest), &(dest))
120
121 #define GETMEMBID(addr, ctfid, member, dest) \
122 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest))
123
124 static boolean_t
125 strisprint(const char *cp)
126 {
127 for (; *cp; cp++) {
128 if (!isprint(*cp))
129 return (B_FALSE);
130 }
131 return (B_TRUE);
132 }
133
134 #define NICENUM_BUFLEN 6
135
136 static int
137 snprintfrac(char *buf, int len,
138 uint64_t numerator, uint64_t denom, int frac_digits)
139 {
140 int mul = 1;
141 int whole, frac, i;
142
143 for (i = frac_digits; i; i--)
144 mul *= 10;
145 whole = numerator / denom;
146 frac = mul * numerator / denom - mul * whole;
147 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac));
148 }
149
150 static void
151 mdb_nicenum(uint64_t num, char *buf)
152 {
153 uint64_t n = num;
154 int index = 0;
155 char *u;
156
157 while (n >= 1024) {
158 n = (n + (1024 / 2)) / 1024; /* Round up or down */
159 index++;
160 }
161
162 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2];
163
164 if (index == 0) {
165 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu",
166 (u_longlong_t)n);
167 } else if (n < 10 && (num & (num - 1)) != 0) {
168 (void) snprintfrac(buf, NICENUM_BUFLEN,
169 num, 1ULL << 10 * index, 2);
170 strcat(buf, u);
171 } else if (n < 100 && (num & (num - 1)) != 0) {
172 (void) snprintfrac(buf, NICENUM_BUFLEN,
173 num, 1ULL << 10 * index, 1);
174 strcat(buf, u);
175 } else {
176 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s",
177 (u_longlong_t)n, u);
178 }
179 }
180
181 static int verbose;
182
183 static int
184 freelist_walk_init(mdb_walk_state_t *wsp)
185 {
186 if (wsp->walk_addr == NULL) {
187 mdb_warn("must supply starting address\n");
188 return (WALK_ERR);
189 }
190
191 wsp->walk_data = 0; /* Index into the freelist */
192 return (WALK_NEXT);
193 }
194
195 static int
196 freelist_walk_step(mdb_walk_state_t *wsp)
197 {
198 uint64_t entry;
199 uintptr_t number = (uintptr_t)wsp->walk_data;
200 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
201 "INVALID", "INVALID", "INVALID", "INVALID" };
202 int mapshift = SPA_MINBLOCKSHIFT;
203
204 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) {
205 mdb_warn("failed to read freelist entry %p", wsp->walk_addr);
206 return (WALK_DONE);
207 }
208 wsp->walk_addr += sizeof (entry);
209 wsp->walk_data = (void *)(number + 1);
210
211 if (SM_DEBUG_DECODE(entry)) {
212 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n",
213 number,
214 ddata[SM_DEBUG_ACTION_DECODE(entry)],
215 SM_DEBUG_TXG_DECODE(entry),
216 SM_DEBUG_SYNCPASS_DECODE(entry));
217 } else {
218 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c "
219 "size=%06llx", number,
220 SM_OFFSET_DECODE(entry) << mapshift,
221 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) <<
222 mapshift,
223 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
224 SM_RUN_DECODE(entry) << mapshift);
225 if (verbose)
226 mdb_printf(" (raw=%012llx)\n", entry);
227 mdb_printf("\n");
228 }
229 return (WALK_NEXT);
230 }
231
232 static int
233 mdb_dsl_dir_name(uintptr_t addr, char *buf)
234 {
235 static int gotid;
236 static mdb_ctf_id_t dd_id;
237 uintptr_t dd_parent;
238 char dd_myname[ZFS_MAX_DATASET_NAME_LEN];
239
240 if (!gotid) {
241 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir",
242 &dd_id) == -1) {
243 mdb_warn("couldn't find struct dsl_dir");
244 return (DCMD_ERR);
245 }
246 gotid = TRUE;
247 }
248 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) ||
249 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) {
250 return (DCMD_ERR);
251 }
252
253 if (dd_parent) {
254 if (mdb_dsl_dir_name(dd_parent, buf))
255 return (DCMD_ERR);
256 strcat(buf, "/");
257 }
258
259 if (dd_myname[0])
260 strcat(buf, dd_myname);
261 else
262 strcat(buf, "???");
263
264 return (0);
265 }
266
267 static int
268 objset_name(uintptr_t addr, char *buf)
269 {
270 static int gotid;
271 static mdb_ctf_id_t os_id, ds_id;
272 uintptr_t os_dsl_dataset;
273 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN];
274 uintptr_t ds_dir;
275
276 buf[0] = '\0';
277
278 if (!gotid) {
279 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset",
280 &os_id) == -1) {
281 mdb_warn("couldn't find struct objset");
282 return (DCMD_ERR);
283 }
284 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset",
285 &ds_id) == -1) {
286 mdb_warn("couldn't find struct dsl_dataset");
287 return (DCMD_ERR);
288 }
289
290 gotid = TRUE;
291 }
292
293 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset))
294 return (DCMD_ERR);
295
296 if (os_dsl_dataset == 0) {
297 strcat(buf, "mos");
298 return (0);
299 }
300
301 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) ||
302 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) {
303 return (DCMD_ERR);
304 }
305
306 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf))
307 return (DCMD_ERR);
308
309 if (ds_snapname[0]) {
310 strcat(buf, "@");
311 strcat(buf, ds_snapname);
312 }
313 return (0);
314 }
315
316 static int
317 enum_lookup(char *type, int val, const char *prefix, size_t size, char *out)
318 {
319 const char *cp;
320 size_t len = strlen(prefix);
321 mdb_ctf_id_t enum_type;
322
323 if (mdb_ctf_lookup_by_name(type, &enum_type) != 0) {
324 mdb_warn("Could not find enum for %s", type);
325 return (-1);
326 }
327
328 if ((cp = mdb_ctf_enum_name(enum_type, val)) != NULL) {
329 if (strncmp(cp, prefix, len) == 0)
330 cp += len;
331 (void) strncpy(out, cp, size);
332 } else {
333 mdb_snprintf(out, size, "? (%d)", val);
334 }
335 return (0);
336 }
337
338 /* ARGSUSED */
339 static int
340 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
341 {
342 /*
343 * This table can be approximately generated by running:
344 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2
345 */
346 static const char *params[] = {
347 "arc_reduce_dnlc_percent",
348 "arc_lotsfree_percent",
349 "zfs_dirty_data_max",
350 "zfs_dirty_data_sync",
351 "zfs_delay_max_ns",
352 "zfs_delay_min_dirty_percent",
353 "zfs_delay_scale",
354 "zfs_vdev_max_active",
355 "zfs_vdev_sync_read_min_active",
356 "zfs_vdev_sync_read_max_active",
357 "zfs_vdev_sync_write_min_active",
358 "zfs_vdev_sync_write_max_active",
359 "zfs_vdev_async_read_min_active",
360 "zfs_vdev_async_read_max_active",
361 "zfs_vdev_async_write_min_active",
362 "zfs_vdev_async_write_max_active",
363 "zfs_vdev_scrub_min_active",
364 "zfs_vdev_scrub_max_active",
365 "zfs_vdev_async_write_active_min_dirty_percent",
366 "zfs_vdev_async_write_active_max_dirty_percent",
367 "spa_asize_inflation",
368 "zfs_arc_max",
369 "zfs_arc_min",
370 "arc_shrink_shift",
371 "zfs_mdcomp_disable",
372 "zfs_prefetch_disable",
373 "zfetch_max_streams",
374 "zfetch_min_sec_reap",
375 "zfetch_block_cap",
376 "zfetch_array_rd_sz",
377 "zfs_default_bs",
378 "zfs_default_ibs",
379 "metaslab_aliquot",
380 "reference_tracking_enable",
381 "reference_history",
382 "spa_max_replication_override",
383 "spa_mode_global",
384 "zfs_flags",
385 "zfs_txg_timeout",
386 "zfs_vdev_cache_max",
387 "zfs_vdev_cache_size",
388 "zfs_vdev_cache_bshift",
389 "vdev_mirror_shift",
390 "zfs_scrub_limit",
391 "zfs_no_scrub_io",
392 "zfs_no_scrub_prefetch",
393 "zfs_vdev_aggregation_limit",
394 "fzap_default_block_shift",
395 "zfs_immediate_write_sz",
396 "zfs_read_chunk_size",
397 "zfs_nocacheflush",
398 "zil_replay_disable",
399 "metaslab_gang_bang",
400 "metaslab_df_alloc_threshold",
401 "metaslab_df_free_pct",
402 "zio_injection_enabled",
403 "zvol_immediate_write_sz",
404 };
405
406 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) {
407 int sz;
408 uint64_t val64;
409 uint32_t *val32p = (uint32_t *)&val64;
410
411 sz = mdb_readvar(&val64, params[i]);
412 if (sz == 4) {
413 mdb_printf("%s = 0x%x\n", params[i], *val32p);
414 } else if (sz == 8) {
415 mdb_printf("%s = 0x%llx\n", params[i], val64);
416 } else {
417 mdb_warn("variable %s not found", params[i]);
418 }
419 }
420
421 return (DCMD_OK);
422 }
423
424 /* ARGSUSED */
425 static int
426 dva(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
427 {
428 dva_t dva;
429 if (mdb_vread(&dva, sizeof (dva_t), addr) == -1) {
430 mdb_warn("failed to read dva_t");
431 return (DCMD_ERR);
432 }
433 mdb_printf("<%llu:%llx:%llx>\n",
434 (u_longlong_t)DVA_GET_VDEV(&dva),
435 (u_longlong_t)DVA_GET_OFFSET(&dva),
436 (u_longlong_t)DVA_GET_ASIZE(&dva));
437
438 return (DCMD_OK);
439 }
440
441 /* ARGSUSED */
442 static int
443 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
444 {
445 char type[80], checksum[80], compress[80];
446 blkptr_t blk, *bp = &blk;
447 char buf[BP_SPRINTF_LEN];
448
449 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) {
450 mdb_warn("failed to read blkptr_t");
451 return (DCMD_ERR);
452 }
453
454 if (enum_lookup("enum dmu_object_type", BP_GET_TYPE(bp), "DMU_OT_",
455 sizeof (type), type) == -1 ||
456 enum_lookup("enum zio_checksum", BP_GET_CHECKSUM(bp),
457 "ZIO_CHECKSUM_", sizeof (checksum), checksum) == -1 ||
458 enum_lookup("enum zio_compress", BP_GET_COMPRESS(bp),
459 "ZIO_COMPRESS_", sizeof (compress), compress) == -1) {
460 mdb_warn("Could not find blkptr enumerated types");
461 return (DCMD_ERR);
462 }
463
464 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type,
465 checksum, compress);
466
467 mdb_printf("%s\n", buf);
468
469 return (DCMD_OK);
470 }
471
472 typedef struct mdb_dmu_buf_impl {
473 struct {
474 uint64_t db_object;
475 uintptr_t db_data;
476 } db;
477 uintptr_t db_objset;
478 uint64_t db_level;
479 uint64_t db_blkid;
480 struct {
481 uint64_t rc_count;
482 } db_holds;
483 } mdb_dmu_buf_impl_t;
484
485 /* ARGSUSED */
486 static int
487 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
488 {
489 mdb_dmu_buf_impl_t db;
490 char objectname[32];
491 char blkidname[32];
492 char path[ZFS_MAX_DATASET_NAME_LEN];
493 int ptr_width = (int)(sizeof (void *)) * 2;
494
495 if (DCMD_HDRSPEC(flags))
496 mdb_printf("%*s %8s %3s %9s %5s %s\n",
497 ptr_width, "addr", "object", "lvl", "blkid", "holds", "os");
498
499 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
500 addr, 0) == -1)
501 return (DCMD_ERR);
502
503 if (db.db.db_object == DMU_META_DNODE_OBJECT)
504 (void) strcpy(objectname, "mdn");
505 else
506 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx",
507 (u_longlong_t)db.db.db_object);
508
509 if (db.db_blkid == DMU_BONUS_BLKID)
510 (void) strcpy(blkidname, "bonus");
511 else
512 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx",
513 (u_longlong_t)db.db_blkid);
514
515 if (objset_name(db.db_objset, path)) {
516 return (DCMD_ERR);
517 }
518
519 mdb_printf("%*p %8s %3u %9s %5llu %s\n", ptr_width, addr,
520 objectname, (int)db.db_level, blkidname,
521 db.db_holds.rc_count, path);
522
523 return (DCMD_OK);
524 }
525
526 /* ARGSUSED */
527 static int
528 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
529 {
530 #define HISTOSZ 32
531 uintptr_t dbp;
532 dmu_buf_impl_t db;
533 dbuf_hash_table_t ht;
534 uint64_t bucket, ndbufs;
535 uint64_t histo[HISTOSZ];
536 uint64_t histo2[HISTOSZ];
537 int i, maxidx;
538
539 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) {
540 mdb_warn("failed to read 'dbuf_hash_table'");
541 return (DCMD_ERR);
542 }
543
544 for (i = 0; i < HISTOSZ; i++) {
545 histo[i] = 0;
546 histo2[i] = 0;
547 }
548
549 ndbufs = 0;
550 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) {
551 int len;
552
553 if (mdb_vread(&dbp, sizeof (void *),
554 (uintptr_t)(ht.hash_table+bucket)) == -1) {
555 mdb_warn("failed to read hash bucket %u at %p",
556 bucket, ht.hash_table+bucket);
557 return (DCMD_ERR);
558 }
559
560 len = 0;
561 while (dbp != 0) {
562 if (mdb_vread(&db, sizeof (dmu_buf_impl_t),
563 dbp) == -1) {
564 mdb_warn("failed to read dbuf at %p", dbp);
565 return (DCMD_ERR);
566 }
567 dbp = (uintptr_t)db.db_hash_next;
568 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--)
569 histo2[i]++;
570 len++;
571 ndbufs++;
572 }
573
574 if (len >= HISTOSZ)
575 len = HISTOSZ-1;
576 histo[len]++;
577 }
578
579 mdb_printf("hash table has %llu buckets, %llu dbufs "
580 "(avg %llu buckets/dbuf)\n",
581 ht.hash_table_mask+1, ndbufs,
582 (ht.hash_table_mask+1)/ndbufs);
583
584 mdb_printf("\n");
585 maxidx = 0;
586 for (i = 0; i < HISTOSZ; i++)
587 if (histo[i] > 0)
588 maxidx = i;
589 mdb_printf("hash chain length number of buckets\n");
590 for (i = 0; i <= maxidx; i++)
591 mdb_printf("%u %llu\n", i, histo[i]);
592
593 mdb_printf("\n");
594 maxidx = 0;
595 for (i = 0; i < HISTOSZ; i++)
596 if (histo2[i] > 0)
597 maxidx = i;
598 mdb_printf("hash chain depth number of dbufs\n");
599 for (i = 0; i <= maxidx; i++)
600 mdb_printf("%u or more %llu %llu%%\n",
601 i, histo2[i], histo2[i]*100/ndbufs);
602
603
604 return (DCMD_OK);
605 }
606
607 #define CHAIN_END 0xffff
608 /*
609 * ::zap_leaf [-v]
610 *
611 * Print a zap_leaf_phys_t, assumed to be 16k
612 */
613 /* ARGSUSED */
614 static int
615 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
616 {
617 char buf[16*1024];
618 int verbose = B_FALSE;
619 int four = B_FALSE;
620 dmu_buf_t l_dbuf;
621 zap_leaf_t l;
622 zap_leaf_phys_t *zlp = (void *)buf;
623 int i;
624
625 if (mdb_getopts(argc, argv,
626 'v', MDB_OPT_SETBITS, TRUE, &verbose,
627 '4', MDB_OPT_SETBITS, TRUE, &four,
628 NULL) != argc)
629 return (DCMD_USAGE);
630
631 l_dbuf.db_data = zlp;
632 l.l_dbuf = &l_dbuf;
633 l.l_bs = 14; /* assume 16k blocks */
634 if (four)
635 l.l_bs = 12;
636
637 if (!(flags & DCMD_ADDRSPEC)) {
638 return (DCMD_USAGE);
639 }
640
641 if (mdb_vread(buf, sizeof (buf), addr) == -1) {
642 mdb_warn("failed to read zap_leaf_phys_t at %p", addr);
643 return (DCMD_ERR);
644 }
645
646 if (zlp->l_hdr.lh_block_type != ZBT_LEAF ||
647 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) {
648 mdb_warn("This does not appear to be a zap_leaf_phys_t");
649 return (DCMD_ERR);
650 }
651
652 mdb_printf("zap_leaf_phys_t at %p:\n", addr);
653 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len);
654 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix);
655 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries);
656 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree,
657 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l)));
658 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist);
659 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags,
660 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ?
661 "ENTRIES_CDSORTED" : "");
662
663 if (verbose) {
664 mdb_printf(" hash table:\n");
665 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) {
666 if (zlp->l_hash[i] != CHAIN_END)
667 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]);
668 }
669 }
670
671 mdb_printf(" chunks:\n");
672 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) {
673 /* LINTED: alignment */
674 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i);
675 switch (zlc->l_entry.le_type) {
676 case ZAP_CHUNK_FREE:
677 if (verbose) {
678 mdb_printf(" %u: free; lf_next = %u\n",
679 i, zlc->l_free.lf_next);
680 }
681 break;
682 case ZAP_CHUNK_ENTRY:
683 mdb_printf(" %u: entry\n", i);
684 if (verbose) {
685 mdb_printf(" le_next = %u\n",
686 zlc->l_entry.le_next);
687 }
688 mdb_printf(" le_name_chunk = %u\n",
689 zlc->l_entry.le_name_chunk);
690 mdb_printf(" le_name_numints = %u\n",
691 zlc->l_entry.le_name_numints);
692 mdb_printf(" le_value_chunk = %u\n",
693 zlc->l_entry.le_value_chunk);
694 mdb_printf(" le_value_intlen = %u\n",
695 zlc->l_entry.le_value_intlen);
696 mdb_printf(" le_value_numints = %u\n",
697 zlc->l_entry.le_value_numints);
698 mdb_printf(" le_cd = %u\n",
699 zlc->l_entry.le_cd);
700 mdb_printf(" le_hash = %llx\n",
701 zlc->l_entry.le_hash);
702 break;
703 case ZAP_CHUNK_ARRAY:
704 mdb_printf(" %u: array", i);
705 if (strisprint((char *)zlc->l_array.la_array))
706 mdb_printf(" \"%s\"", zlc->l_array.la_array);
707 mdb_printf("\n");
708 if (verbose) {
709 int j;
710 mdb_printf(" ");
711 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) {
712 mdb_printf("%02x ",
713 zlc->l_array.la_array[j]);
714 }
715 mdb_printf("\n");
716 }
717 if (zlc->l_array.la_next != CHAIN_END) {
718 mdb_printf(" lf_next = %u\n",
719 zlc->l_array.la_next);
720 }
721 break;
722 default:
723 mdb_printf(" %u: undefined type %u\n",
724 zlc->l_entry.le_type);
725 }
726 }
727
728 return (DCMD_OK);
729 }
730
731 typedef struct dbufs_data {
732 mdb_ctf_id_t id;
733 uint64_t objset;
734 uint64_t object;
735 uint64_t level;
736 uint64_t blkid;
737 char *osname;
738 } dbufs_data_t;
739
740 #define DBUFS_UNSET (0xbaddcafedeadbeefULL)
741
742 /* ARGSUSED */
743 static int
744 dbufs_cb(uintptr_t addr, const void *unknown, void *arg)
745 {
746 dbufs_data_t *data = arg;
747 uintptr_t objset;
748 dmu_buf_t db;
749 uint8_t level;
750 uint64_t blkid;
751 char osname[ZFS_MAX_DATASET_NAME_LEN];
752
753 if (GETMEMBID(addr, &data->id, db_objset, objset) ||
754 GETMEMBID(addr, &data->id, db, db) ||
755 GETMEMBID(addr, &data->id, db_level, level) ||
756 GETMEMBID(addr, &data->id, db_blkid, blkid)) {
757 return (WALK_ERR);
758 }
759
760 if ((data->objset == DBUFS_UNSET || data->objset == objset) &&
761 (data->osname == NULL || (objset_name(objset, osname) == 0 &&
762 strcmp(data->osname, osname) == 0)) &&
763 (data->object == DBUFS_UNSET || data->object == db.db_object) &&
764 (data->level == DBUFS_UNSET || data->level == level) &&
765 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) {
766 mdb_printf("%#lr\n", addr);
767 }
768 return (WALK_NEXT);
769 }
770
771 /* ARGSUSED */
772 static int
773 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
774 {
775 dbufs_data_t data;
776 char *object = NULL;
777 char *blkid = NULL;
778
779 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET;
780 data.osname = NULL;
781
782 if (mdb_getopts(argc, argv,
783 'O', MDB_OPT_UINT64, &data.objset,
784 'n', MDB_OPT_STR, &data.osname,
785 'o', MDB_OPT_STR, &object,
786 'l', MDB_OPT_UINT64, &data.level,
787 'b', MDB_OPT_STR, &blkid) != argc) {
788 return (DCMD_USAGE);
789 }
790
791 if (object) {
792 if (strcmp(object, "mdn") == 0) {
793 data.object = DMU_META_DNODE_OBJECT;
794 } else {
795 data.object = mdb_strtoull(object);
796 }
797 }
798
799 if (blkid) {
800 if (strcmp(blkid, "bonus") == 0) {
801 data.blkid = DMU_BONUS_BLKID;
802 } else {
803 data.blkid = mdb_strtoull(blkid);
804 }
805 }
806
807 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) {
808 mdb_warn("couldn't find struct dmu_buf_impl_t");
809 return (DCMD_ERR);
810 }
811
812 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) {
813 mdb_warn("can't walk dbufs");
814 return (DCMD_ERR);
815 }
816
817 return (DCMD_OK);
818 }
819
820 typedef struct abuf_find_data {
821 dva_t dva;
822 mdb_ctf_id_t id;
823 } abuf_find_data_t;
824
825 /* ARGSUSED */
826 static int
827 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg)
828 {
829 abuf_find_data_t *data = arg;
830 dva_t dva;
831
832 if (GETMEMBID(addr, &data->id, b_dva, dva)) {
833 return (WALK_ERR);
834 }
835
836 if (dva.dva_word[0] == data->dva.dva_word[0] &&
837 dva.dva_word[1] == data->dva.dva_word[1]) {
838 mdb_printf("%#lr\n", addr);
839 }
840 return (WALK_NEXT);
841 }
842
843 /* ARGSUSED */
844 static int
845 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
846 {
847 abuf_find_data_t data;
848 GElf_Sym sym;
849 int i;
850 const char *syms[] = {
851 "ARC_mru",
852 "ARC_mru_ghost",
853 "ARC_mfu",
854 "ARC_mfu_ghost",
855 };
856
857 if (argc != 2)
858 return (DCMD_USAGE);
859
860 for (i = 0; i < 2; i ++) {
861 switch (argv[i].a_type) {
862 case MDB_TYPE_STRING:
863 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str);
864 break;
865 case MDB_TYPE_IMMEDIATE:
866 data.dva.dva_word[i] = argv[i].a_un.a_val;
867 break;
868 default:
869 return (DCMD_USAGE);
870 }
871 }
872
873 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) {
874 mdb_warn("couldn't find struct arc_buf_hdr");
875 return (DCMD_ERR);
876 }
877
878 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) {
879 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) {
880 mdb_warn("can't find symbol %s", syms[i]);
881 return (DCMD_ERR);
882 }
883
884 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) {
885 mdb_warn("can't walk %s", syms[i]);
886 return (DCMD_ERR);
887 }
888 }
889
890 return (DCMD_OK);
891 }
892
893
894 typedef struct dbgmsg_arg {
895 boolean_t da_verbose;
896 boolean_t da_address;
897 } dbgmsg_arg_t;
898
899 /* ARGSUSED */
900 static int
901 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg)
902 {
903 static mdb_ctf_id_t id;
904 static boolean_t gotid;
905 static ulong_t off;
906
907 dbgmsg_arg_t *da = arg;
908 time_t timestamp;
909 char buf[1024];
910
911 if (!gotid) {
912 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) ==
913 -1) {
914 mdb_warn("couldn't find struct zfs_dbgmsg");
915 return (WALK_ERR);
916 }
917 gotid = TRUE;
918 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) {
919 mdb_warn("couldn't find zdm_msg");
920 return (WALK_ERR);
921 }
922 off /= 8;
923 }
924
925
926 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) {
927 return (WALK_ERR);
928 }
929
930 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) {
931 mdb_warn("failed to read zdm_msg at %p\n", addr + off);
932 return (DCMD_ERR);
933 }
934
935 if (da->da_address)
936 mdb_printf("%p ", addr);
937 if (da->da_verbose)
938 mdb_printf("%Y ", timestamp);
939
940 mdb_printf("%s\n", buf);
941
942 if (da->da_verbose)
943 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
944
945 return (WALK_NEXT);
946 }
947
948 /* ARGSUSED */
949 static int
950 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
951 {
952 GElf_Sym sym;
953 dbgmsg_arg_t da = { 0 };
954
955 if (mdb_getopts(argc, argv,
956 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose,
957 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address,
958 NULL) != argc)
959 return (DCMD_USAGE);
960
961 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) {
962 mdb_warn("can't find zfs_dbgmsgs");
963 return (DCMD_ERR);
964 }
965
966 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) {
967 mdb_warn("can't walk zfs_dbgmsgs");
968 return (DCMD_ERR);
969 }
970
971 return (DCMD_OK);
972 }
973
974 /*ARGSUSED*/
975 static int
976 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
977 {
978 kstat_named_t *stats;
979 GElf_Sym sym;
980 int nstats, i;
981 uint_t opt_a = FALSE;
982 uint_t opt_b = FALSE;
983 uint_t shift = 0;
984 const char *suffix;
985
986 static const char *bytestats[] = {
987 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size",
988 "arc_meta_used", "arc_meta_limit", "arc_meta_max",
989 "arc_meta_min", "hdr_size", "data_size", "metadata_size",
990 "other_size", "anon_size", "anon_evictable_data",
991 "anon_evictable_metadata", "mru_size", "mru_evictable_data",
992 "mru_evictable_metadata", "mru_ghost_size",
993 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata",
994 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata",
995 "mfu_ghost_size", "mfu_ghost_evictable_data",
996 "mfu_ghost_evictable_metadata", "evict_l2_cached",
997 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes",
998 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size",
999 "compressed_size", "uncompressed_size", "overhead_size",
1000 NULL
1001 };
1002
1003 static const char *extras[] = {
1004 "arc_no_grow", "arc_tempreserve",
1005 NULL
1006 };
1007
1008 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) {
1009 mdb_warn("failed to find 'arc_stats'");
1010 return (DCMD_ERR);
1011 }
1012
1013 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC);
1014
1015 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) {
1016 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value);
1017 return (DCMD_ERR);
1018 }
1019
1020 nstats = sym.st_size / sizeof (kstat_named_t);
1021
1022 /* NB: -a / opt_a are ignored for backwards compatability */
1023 if (mdb_getopts(argc, argv,
1024 'a', MDB_OPT_SETBITS, TRUE, &opt_a,
1025 'b', MDB_OPT_SETBITS, TRUE, &opt_b,
1026 'k', MDB_OPT_SETBITS, 10, &shift,
1027 'm', MDB_OPT_SETBITS, 20, &shift,
1028 'g', MDB_OPT_SETBITS, 30, &shift,
1029 NULL) != argc)
1030 return (DCMD_USAGE);
1031
1032 if (!opt_b && !shift)
1033 shift = 20;
1034
1035 switch (shift) {
1036 case 0:
1037 suffix = "B";
1038 break;
1039 case 10:
1040 suffix = "KB";
1041 break;
1042 case 20:
1043 suffix = "MB";
1044 break;
1045 case 30:
1046 suffix = "GB";
1047 break;
1048 default:
1049 suffix = "XX";
1050 }
1051
1052 for (i = 0; i < nstats; i++) {
1053 int j;
1054 boolean_t bytes = B_FALSE;
1055
1056 for (j = 0; bytestats[j]; j++) {
1057 if (strcmp(stats[i].name, bytestats[j]) == 0) {
1058 bytes = B_TRUE;
1059 break;
1060 }
1061 }
1062
1063 if (bytes) {
1064 mdb_printf("%-25s = %9llu %s\n", stats[i].name,
1065 stats[i].value.ui64 >> shift, suffix);
1066 } else {
1067 mdb_printf("%-25s = %9llu\n", stats[i].name,
1068 stats[i].value.ui64);
1069 }
1070 }
1071
1072 for (i = 0; extras[i]; i++) {
1073 uint64_t buf;
1074
1075 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) {
1076 mdb_warn("failed to find '%s'", extras[i]);
1077 return (DCMD_ERR);
1078 }
1079
1080 if (sym.st_size != sizeof (uint64_t) &&
1081 sym.st_size != sizeof (uint32_t)) {
1082 mdb_warn("expected scalar for variable '%s'\n",
1083 extras[i]);
1084 return (DCMD_ERR);
1085 }
1086
1087 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) {
1088 mdb_warn("couldn't read '%s'", extras[i]);
1089 return (DCMD_ERR);
1090 }
1091
1092 mdb_printf("%-25s = ", extras[i]);
1093
1094 /* NB: all the 64-bit extras happen to be byte counts */
1095 if (sym.st_size == sizeof (uint64_t))
1096 mdb_printf("%9llu %s\n", buf >> shift, suffix);
1097
1098 if (sym.st_size == sizeof (uint32_t))
1099 mdb_printf("%9d\n", *((uint32_t *)&buf));
1100 }
1101 return (DCMD_OK);
1102 }
1103
1104 typedef struct mdb_spa_print {
1105 pool_state_t spa_state;
1106 char spa_name[ZFS_MAX_DATASET_NAME_LEN];
1107 uintptr_t spa_normal_class;
1108 } mdb_spa_print_t;
1109
1110
1111 const char histo_stars[] = "****************************************";
1112 const int histo_width = sizeof (histo_stars) - 1;
1113
1114 static void
1115 dump_histogram(const uint64_t *histo, int size, int offset)
1116 {
1117 int i;
1118 int minidx = size - 1;
1119 int maxidx = 0;
1120 uint64_t max = 0;
1121
1122 for (i = 0; i < size; i++) {
1123 if (histo[i] > max)
1124 max = histo[i];
1125 if (histo[i] > 0 && i > maxidx)
1126 maxidx = i;
1127 if (histo[i] > 0 && i < minidx)
1128 minidx = i;
1129 }
1130
1131 if (max < histo_width)
1132 max = histo_width;
1133
1134 for (i = minidx; i <= maxidx; i++) {
1135 mdb_printf("%3u: %6llu %s\n",
1136 i + offset, (u_longlong_t)histo[i],
1137 &histo_stars[(max - histo[i]) * histo_width / max]);
1138 }
1139 }
1140
1141 typedef struct mdb_metaslab_class {
1142 uint64_t mc_histogram[RANGE_TREE_HISTOGRAM_SIZE];
1143 } mdb_metaslab_class_t;
1144
1145 /*
1146 * spa_class_histogram(uintptr_t class_addr)
1147 *
1148 * Prints free space histogram for a device class
1149 *
1150 * Returns DCMD_OK, or DCMD_ERR.
1151 */
1152 static int
1153 spa_class_histogram(uintptr_t class_addr)
1154 {
1155 mdb_metaslab_class_t mc;
1156 if (mdb_ctf_vread(&mc, "metaslab_class_t",
1157 "mdb_metaslab_class_t", class_addr, 0) == -1)
1158 return (DCMD_ERR);
1159
1160 mdb_inc_indent(4);
1161 dump_histogram(mc.mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1162 mdb_dec_indent(4);
1163 return (DCMD_OK);
1164 }
1165
1166 /*
1167 * ::spa
1168 *
1169 * -c Print configuration information as well
1170 * -v Print vdev state
1171 * -e Print vdev error stats
1172 * -m Print vdev metaslab info
1173 * -M print vdev metaslab group info
1174 * -h Print histogram info (must be combined with -m or -M)
1175 *
1176 * Print a summarized spa_t. When given no arguments, prints out a table of all
1177 * active pools on the system.
1178 */
1179 /* ARGSUSED */
1180 static int
1181 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1182 {
1183 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED",
1184 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" };
1185 const char *state;
1186 int spa_flags = 0;
1187
1188 if (mdb_getopts(argc, argv,
1189 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags,
1190 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags,
1191 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1192 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1193 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1194 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1195 NULL) != argc)
1196 return (DCMD_USAGE);
1197
1198 if (!(flags & DCMD_ADDRSPEC)) {
1199 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) {
1200 mdb_warn("can't walk spa");
1201 return (DCMD_ERR);
1202 }
1203
1204 return (DCMD_OK);
1205 }
1206
1207 if (flags & DCMD_PIPE_OUT) {
1208 mdb_printf("%#lr\n", addr);
1209 return (DCMD_OK);
1210 }
1211
1212 if (DCMD_HDRSPEC(flags))
1213 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE",
1214 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME");
1215
1216 mdb_spa_print_t spa;
1217 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1)
1218 return (DCMD_ERR);
1219
1220 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL)
1221 state = "UNKNOWN";
1222 else
1223 state = statetab[spa.spa_state];
1224
1225 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name);
1226 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1227 spa_class_histogram(spa.spa_normal_class);
1228
1229 if (spa_flags & SPA_FLAG_CONFIG) {
1230 mdb_printf("\n");
1231 mdb_inc_indent(4);
1232 if (mdb_call_dcmd("spa_config", addr, flags, 0,
1233 NULL) != DCMD_OK)
1234 return (DCMD_ERR);
1235 mdb_dec_indent(4);
1236 }
1237
1238 if (spa_flags & SPA_FLAG_ALL_VDEV) {
1239 mdb_arg_t v;
1240 char opts[100] = "-";
1241 int args =
1242 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1;
1243
1244 if (spa_flags & SPA_FLAG_ERRORS)
1245 strcat(opts, "e");
1246 if (spa_flags & SPA_FLAG_METASLABS)
1247 strcat(opts, "m");
1248 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1249 strcat(opts, "M");
1250 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1251 strcat(opts, "h");
1252
1253 v.a_type = MDB_TYPE_STRING;
1254 v.a_un.a_str = opts;
1255
1256 mdb_printf("\n");
1257 mdb_inc_indent(4);
1258 if (mdb_call_dcmd("spa_vdevs", addr, flags, args,
1259 &v) != DCMD_OK)
1260 return (DCMD_ERR);
1261 mdb_dec_indent(4);
1262 }
1263
1264 return (DCMD_OK);
1265 }
1266
1267 typedef struct mdb_spa_config_spa {
1268 uintptr_t spa_config;
1269 } mdb_spa_config_spa_t;
1270
1271 /*
1272 * ::spa_config
1273 *
1274 * Given a spa_t, print the configuration information stored in spa_config.
1275 * Since it's just an nvlist, format it as an indented list of name=value pairs.
1276 * We simply read the value of spa_config and pass off to ::nvlist.
1277 */
1278 /* ARGSUSED */
1279 static int
1280 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1281 {
1282 mdb_spa_config_spa_t spa;
1283
1284 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1285 return (DCMD_USAGE);
1286
1287 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t",
1288 addr, 0) == -1)
1289 return (DCMD_ERR);
1290
1291 if (spa.spa_config == 0) {
1292 mdb_printf("(none)\n");
1293 return (DCMD_OK);
1294 }
1295
1296 return (mdb_call_dcmd("nvlist", spa.spa_config, flags,
1297 0, NULL));
1298 }
1299
1300
1301
1302 typedef struct mdb_range_tree {
1303 uint64_t rt_space;
1304 } mdb_range_tree_t;
1305
1306 typedef struct mdb_metaslab_group {
1307 uint64_t mg_fragmentation;
1308 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE];
1309 uintptr_t mg_vd;
1310 } mdb_metaslab_group_t;
1311
1312 typedef struct mdb_metaslab {
1313 uint64_t ms_id;
1314 uint64_t ms_start;
1315 uint64_t ms_size;
1316 int64_t ms_deferspace;
1317 uint64_t ms_fragmentation;
1318 uint64_t ms_weight;
1319 uintptr_t ms_alloctree[TXG_SIZE];
1320 uintptr_t ms_freeingtree;
1321 uintptr_t ms_freedtree;
1322 uintptr_t ms_tree;
1323 uintptr_t ms_sm;
1324 } mdb_metaslab_t;
1325
1326 typedef struct mdb_space_map_phys_t {
1327 uint64_t smp_alloc;
1328 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE];
1329 } mdb_space_map_phys_t;
1330
1331 typedef struct mdb_space_map {
1332 uint64_t sm_size;
1333 uint8_t sm_shift;
1334 uint64_t sm_alloc;
1335 uintptr_t sm_phys;
1336 } mdb_space_map_t;
1337
1338 typedef struct mdb_vdev {
1339 uintptr_t vdev_path;
1340 uintptr_t vdev_ms;
1341 uintptr_t vdev_ops;
1342 uint64_t vdev_ms_count;
1343 uint64_t vdev_id;
1344 vdev_stat_t vdev_stat;
1345 } mdb_vdev_t;
1346
1347 typedef struct mdb_vdev_ops {
1348 char vdev_op_type[16];
1349 } mdb_vdev_ops_t;
1350
1351 static int
1352 metaslab_stats(uintptr_t addr, int spa_flags)
1353 {
1354 mdb_vdev_t vdev;
1355 uintptr_t *vdev_ms;
1356
1357 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t",
1358 (uintptr_t)addr, 0) == -1) {
1359 mdb_warn("failed to read vdev at %p\n", addr);
1360 return (DCMD_ERR);
1361 }
1362
1363 mdb_inc_indent(4);
1364 mdb_printf("%<u>%-?s %6s %20s %10s %9s%</u>\n", "ADDR", "ID",
1365 "OFFSET", "FREE", "FRAGMENTATION");
1366
1367 vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *),
1368 UM_SLEEP | UM_GC);
1369 if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *),
1370 (uintptr_t)vdev.vdev_ms) == -1) {
1371 mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms);
1372 return (DCMD_ERR);
1373 }
1374
1375 for (int m = 0; m < vdev.vdev_ms_count; m++) {
1376 mdb_metaslab_t ms;
1377 mdb_space_map_t sm = { 0 };
1378 char free[NICENUM_BUFLEN];
1379
1380 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1381 (uintptr_t)vdev_ms[m], 0) == -1)
1382 return (DCMD_ERR);
1383
1384 if (ms.ms_sm != NULL &&
1385 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t",
1386 ms.ms_sm, 0) == -1)
1387 return (DCMD_ERR);
1388
1389 mdb_nicenum(ms.ms_size - sm.sm_alloc, free);
1390
1391 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id,
1392 ms.ms_start, free);
1393 if (ms.ms_fragmentation == ZFS_FRAG_INVALID)
1394 mdb_printf("%9s\n", "-");
1395 else
1396 mdb_printf("%9llu%%\n", ms.ms_fragmentation);
1397
1398 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != NULL) {
1399 mdb_space_map_phys_t smp;
1400
1401 if (sm.sm_phys == NULL)
1402 continue;
1403
1404 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1405 "mdb_space_map_phys_t", sm.sm_phys, 0);
1406
1407 dump_histogram(smp.smp_histogram,
1408 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift);
1409 }
1410 }
1411 mdb_dec_indent(4);
1412 return (DCMD_OK);
1413 }
1414
1415 static int
1416 metaslab_group_stats(uintptr_t addr, int spa_flags)
1417 {
1418 mdb_metaslab_group_t mg;
1419 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t",
1420 (uintptr_t)addr, 0) == -1) {
1421 mdb_warn("failed to read vdev_mg at %p\n", addr);
1422 return (DCMD_ERR);
1423 }
1424
1425 mdb_inc_indent(4);
1426 mdb_printf("%<u>%-?s %15s%</u>\n", "ADDR", "FRAGMENTATION");
1427 if (mg.mg_fragmentation == ZFS_FRAG_INVALID)
1428 mdb_printf("%0?p %15s\n", addr, "-");
1429 else
1430 mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation);
1431
1432 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1433 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1434 mdb_dec_indent(4);
1435 return (DCMD_OK);
1436 }
1437
1438 /*
1439 * ::vdev
1440 *
1441 * Print out a summarized vdev_t, in the following form:
1442 *
1443 * ADDR STATE AUX DESC
1444 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0
1445 *
1446 * If '-r' is specified, recursively visit all children.
1447 *
1448 * With '-e', the statistics associated with the vdev are printed as well.
1449 */
1450 static int
1451 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive,
1452 int spa_flags)
1453 {
1454 vdev_t vdev;
1455 char desc[MAXNAMELEN];
1456 int c, children;
1457 uintptr_t *child;
1458 const char *state, *aux;
1459
1460 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) {
1461 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr);
1462 return (DCMD_ERR);
1463 }
1464
1465 if (flags & DCMD_PIPE_OUT) {
1466 mdb_printf("%#lr\n", addr);
1467 } else {
1468 if (vdev.vdev_path != NULL) {
1469 if (mdb_readstr(desc, sizeof (desc),
1470 (uintptr_t)vdev.vdev_path) == -1) {
1471 mdb_warn("failed to read vdev_path at %p\n",
1472 vdev.vdev_path);
1473 return (DCMD_ERR);
1474 }
1475 } else if (vdev.vdev_ops != NULL) {
1476 vdev_ops_t ops;
1477 if (mdb_vread(&ops, sizeof (ops),
1478 (uintptr_t)vdev.vdev_ops) == -1) {
1479 mdb_warn("failed to read vdev_ops at %p\n",
1480 vdev.vdev_ops);
1481 return (DCMD_ERR);
1482 }
1483 (void) strcpy(desc, ops.vdev_op_type);
1484 } else {
1485 (void) strcpy(desc, "<unknown>");
1486 }
1487
1488 if (depth == 0 && DCMD_HDRSPEC(flags))
1489 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n",
1490 "ADDR", "STATE", "AUX",
1491 sizeof (uintptr_t) == 4 ? 43 : 35,
1492 "DESCRIPTION");
1493
1494 mdb_printf("%0?p ", addr);
1495
1496 switch (vdev.vdev_state) {
1497 case VDEV_STATE_CLOSED:
1498 state = "CLOSED";
1499 break;
1500 case VDEV_STATE_OFFLINE:
1501 state = "OFFLINE";
1502 break;
1503 case VDEV_STATE_CANT_OPEN:
1504 state = "CANT_OPEN";
1505 break;
1506 case VDEV_STATE_DEGRADED:
1507 state = "DEGRADED";
1508 break;
1509 case VDEV_STATE_HEALTHY:
1510 state = "HEALTHY";
1511 break;
1512 case VDEV_STATE_REMOVED:
1513 state = "REMOVED";
1514 break;
1515 case VDEV_STATE_FAULTED:
1516 state = "FAULTED";
1517 break;
1518 default:
1519 state = "UNKNOWN";
1520 break;
1521 }
1522
1523 switch (vdev.vdev_stat.vs_aux) {
1524 case VDEV_AUX_NONE:
1525 aux = "-";
1526 break;
1527 case VDEV_AUX_OPEN_FAILED:
1528 aux = "OPEN_FAILED";
1529 break;
1530 case VDEV_AUX_CORRUPT_DATA:
1531 aux = "CORRUPT_DATA";
1532 break;
1533 case VDEV_AUX_NO_REPLICAS:
1534 aux = "NO_REPLICAS";
1535 break;
1536 case VDEV_AUX_BAD_GUID_SUM:
1537 aux = "BAD_GUID_SUM";
1538 break;
1539 case VDEV_AUX_TOO_SMALL:
1540 aux = "TOO_SMALL";
1541 break;
1542 case VDEV_AUX_BAD_LABEL:
1543 aux = "BAD_LABEL";
1544 break;
1545 case VDEV_AUX_VERSION_NEWER:
1546 aux = "VERS_NEWER";
1547 break;
1548 case VDEV_AUX_VERSION_OLDER:
1549 aux = "VERS_OLDER";
1550 break;
1551 case VDEV_AUX_UNSUP_FEAT:
1552 aux = "UNSUP_FEAT";
1553 break;
1554 case VDEV_AUX_SPARED:
1555 aux = "SPARED";
1556 break;
1557 case VDEV_AUX_ERR_EXCEEDED:
1558 aux = "ERR_EXCEEDED";
1559 break;
1560 case VDEV_AUX_IO_FAILURE:
1561 aux = "IO_FAILURE";
1562 break;
1563 case VDEV_AUX_BAD_LOG:
1564 aux = "BAD_LOG";
1565 break;
1566 case VDEV_AUX_EXTERNAL:
1567 aux = "EXTERNAL";
1568 break;
1569 case VDEV_AUX_SPLIT_POOL:
1570 aux = "SPLIT_POOL";
1571 break;
1572 case VDEV_AUX_CHILDREN_OFFLINE:
1573 aux = "CHILDREN_OFFLINE";
1574 break;
1575 default:
1576 aux = "UNKNOWN";
1577 break;
1578 }
1579
1580 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc);
1581
1582 if (spa_flags & SPA_FLAG_ERRORS) {
1583 vdev_stat_t *vs = &vdev.vdev_stat;
1584 int i;
1585
1586 mdb_inc_indent(4);
1587 mdb_printf("\n");
1588 mdb_printf("%<u> %12s %12s %12s %12s "
1589 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM",
1590 "IOCTL");
1591 mdb_printf("OPS ");
1592 for (i = 1; i < ZIO_TYPES; i++)
1593 mdb_printf("%11#llx%s", vs->vs_ops[i],
1594 i == ZIO_TYPES - 1 ? "" : " ");
1595 mdb_printf("\n");
1596 mdb_printf("BYTES ");
1597 for (i = 1; i < ZIO_TYPES; i++)
1598 mdb_printf("%11#llx%s", vs->vs_bytes[i],
1599 i == ZIO_TYPES - 1 ? "" : " ");
1600
1601
1602 mdb_printf("\n");
1603 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors);
1604 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors);
1605 mdb_printf("ECKSUM %10#llx\n",
1606 vs->vs_checksum_errors);
1607 mdb_dec_indent(4);
1608 mdb_printf("\n");
1609 }
1610
1611 if (spa_flags & SPA_FLAG_METASLAB_GROUPS &&
1612 vdev.vdev_mg != NULL) {
1613 metaslab_group_stats((uintptr_t)vdev.vdev_mg,
1614 spa_flags);
1615 }
1616 if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) {
1617 metaslab_stats((uintptr_t)addr, spa_flags);
1618 }
1619 }
1620
1621 children = vdev.vdev_children;
1622
1623 if (children == 0 || !recursive)
1624 return (DCMD_OK);
1625
1626 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC);
1627 if (mdb_vread(child, children * sizeof (void *),
1628 (uintptr_t)vdev.vdev_child) == -1) {
1629 mdb_warn("failed to read vdev children at %p", vdev.vdev_child);
1630 return (DCMD_ERR);
1631 }
1632
1633 for (c = 0; c < children; c++) {
1634 if (do_print_vdev(child[c], flags, depth + 2, recursive,
1635 spa_flags)) {
1636 return (DCMD_ERR);
1637 }
1638 }
1639
1640 return (DCMD_OK);
1641 }
1642
1643 static int
1644 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1645 {
1646 uint64_t depth = 0;
1647 boolean_t recursive = B_FALSE;
1648 int spa_flags = 0;
1649
1650 if (mdb_getopts(argc, argv,
1651 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1652 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1653 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1654 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1655 'r', MDB_OPT_SETBITS, TRUE, &recursive,
1656 'd', MDB_OPT_UINT64, &depth, NULL) != argc)
1657 return (DCMD_USAGE);
1658
1659 if (!(flags & DCMD_ADDRSPEC)) {
1660 mdb_warn("no vdev_t address given\n");
1661 return (DCMD_ERR);
1662 }
1663
1664 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags));
1665 }
1666
1667 typedef struct mdb_metaslab_alloc_trace {
1668 uintptr_t mat_mg;
1669 uintptr_t mat_msp;
1670 uint64_t mat_size;
1671 uint64_t mat_weight;
1672 uint64_t mat_offset;
1673 uint32_t mat_dva_id;
1674 } mdb_metaslab_alloc_trace_t;
1675
1676 static void
1677 metaslab_print_weight(uint64_t weight)
1678 {
1679 char buf[100];
1680
1681 if (WEIGHT_IS_SPACEBASED(weight)) {
1682 mdb_nicenum(
1683 weight & ~(METASLAB_ACTIVE_MASK | METASLAB_WEIGHT_TYPE),
1684 buf);
1685 } else {
1686 char size[NICENUM_BUFLEN];
1687 mdb_nicenum(1ULL << WEIGHT_GET_INDEX(weight), size);
1688 (void) mdb_snprintf(buf, sizeof (buf), "%llu x %s",
1689 WEIGHT_GET_COUNT(weight), size);
1690 }
1691 mdb_printf("%11s ", buf);
1692 }
1693
1694 /* ARGSUSED */
1695 static int
1696 metaslab_weight(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1697 {
1698 uint64_t weight = 0;
1699 char active;
1700
1701 if (argc == 0 && (flags & DCMD_ADDRSPEC)) {
1702 if (mdb_vread(&weight, sizeof (uint64_t), addr) == -1) {
1703 mdb_warn("failed to read weight at %p\n", addr);
1704 return (DCMD_ERR);
1705 }
1706 } else if (argc == 1 && !(flags & DCMD_ADDRSPEC)) {
1707 weight = (argv[0].a_type == MDB_TYPE_IMMEDIATE) ?
1708 argv[0].a_un.a_val : mdb_strtoull(argv[0].a_un.a_str);
1709 } else {
1710 return (DCMD_USAGE);
1711 }
1712
1713 if (DCMD_HDRSPEC(flags)) {
1714 mdb_printf("%<u>%-6s %9s %9s%</u>\n",
1715 "ACTIVE", "ALGORITHM", "WEIGHT");
1716 }
1717
1718 if (weight & METASLAB_WEIGHT_PRIMARY)
1719 active = 'P';
1720 else if (weight & METASLAB_WEIGHT_SECONDARY)
1721 active = 'S';
1722 else
1723 active = '-';
1724 mdb_printf("%6c %8s ", active,
1725 WEIGHT_IS_SPACEBASED(weight) ? "SPACE" : "SEGMENT");
1726 metaslab_print_weight(weight);
1727 mdb_printf("\n");
1728
1729 return (DCMD_OK);
1730 }
1731
1732 /* ARGSUSED */
1733 static int
1734 metaslab_trace(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1735 {
1736 mdb_metaslab_alloc_trace_t mat;
1737 mdb_metaslab_group_t mg = { 0 };
1738 char result_type[100];
1739
1740 if (mdb_ctf_vread(&mat, "metaslab_alloc_trace_t",
1741 "mdb_metaslab_alloc_trace_t", addr, 0) == -1) {
1742 return (DCMD_ERR);
1743 }
1744
1745 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) {
1746 mdb_printf("%<u>%6s %6s %8s %11s %18s %18s%</u>\n",
1747 "MSID", "DVA", "ASIZE", "WEIGHT", "RESULT", "VDEV");
1748 }
1749
1750 if (mat.mat_msp != NULL) {
1751 mdb_metaslab_t ms;
1752
1753 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1754 mat.mat_msp, 0) == -1) {
1755 return (DCMD_ERR);
1756 }
1757 mdb_printf("%6llu ", ms.ms_id);
1758 } else {
1759 mdb_printf("%6s ", "-");
1760 }
1761
1762 mdb_printf("%6d %8llx ", mat.mat_dva_id, mat.mat_size);
1763
1764 metaslab_print_weight(mat.mat_weight);
1765
1766 if ((int64_t)mat.mat_offset < 0) {
1767 if (enum_lookup("enum trace_alloc_type", mat.mat_offset,
1768 "TRACE_", sizeof (result_type), result_type) == -1) {
1769 mdb_warn("Could not find enum for trace_alloc_type");
1770 return (DCMD_ERR);
1771 }
1772 mdb_printf("%18s ", result_type);
1773 } else {
1774 mdb_printf("%<b>%18llx%</b> ", mat.mat_offset);
1775 }
1776
1777 if (mat.mat_mg != NULL &&
1778 mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t",
1779 mat.mat_mg, 0) == -1) {
1780 return (DCMD_ERR);
1781 }
1782
1783 if (mg.mg_vd != NULL) {
1784 mdb_vdev_t vdev;
1785 char desc[MAXNAMELEN];
1786
1787 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t",
1788 mg.mg_vd, 0) == -1) {
1789 return (DCMD_ERR);
1790 }
1791
1792 if (vdev.vdev_path != NULL) {
1793 char path[MAXNAMELEN];
1794
1795 if (mdb_readstr(path, sizeof (path),
1796 vdev.vdev_path) == -1) {
1797 mdb_warn("failed to read vdev_path at %p\n",
1798 vdev.vdev_path);
1799 return (DCMD_ERR);
1800 }
1801 char *slash;
1802 if ((slash = strrchr(path, '/')) != NULL) {
1803 strcpy(desc, slash + 1);
1804 } else {
1805 strcpy(desc, path);
1806 }
1807 } else if (vdev.vdev_ops != NULL) {
1808 mdb_vdev_ops_t ops;
1809 if (mdb_ctf_vread(&ops, "vdev_ops_t", "mdb_vdev_ops_t",
1810 vdev.vdev_ops, 0) == -1) {
1811 mdb_warn("failed to read vdev_ops at %p\n",
1812 vdev.vdev_ops);
1813 return (DCMD_ERR);
1814 }
1815 (void) mdb_snprintf(desc, sizeof (desc),
1816 "%s-%llu", ops.vdev_op_type, vdev.vdev_id);
1817 } else {
1818 (void) strcpy(desc, "<unknown>");
1819 }
1820 mdb_printf("%18s\n", desc);
1821 }
1822
1823 return (DCMD_OK);
1824 }
1825
1826 typedef struct metaslab_walk_data {
1827 uint64_t mw_numvdevs;
1828 uintptr_t *mw_vdevs;
1829 int mw_curvdev;
1830 uint64_t mw_nummss;
1831 uintptr_t *mw_mss;
1832 int mw_curms;
1833 } metaslab_walk_data_t;
1834
1835 static int
1836 metaslab_walk_step(mdb_walk_state_t *wsp)
1837 {
1838 metaslab_walk_data_t *mw = wsp->walk_data;
1839 metaslab_t ms;
1840 uintptr_t msp;
1841
1842 if (mw->mw_curvdev >= mw->mw_numvdevs)
1843 return (WALK_DONE);
1844
1845 if (mw->mw_mss == NULL) {
1846 uintptr_t mssp;
1847 uintptr_t vdevp;
1848
1849 ASSERT(mw->mw_curms == 0);
1850 ASSERT(mw->mw_nummss == 0);
1851
1852 vdevp = mw->mw_vdevs[mw->mw_curvdev];
1853 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) ||
1854 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) {
1855 return (WALK_ERR);
1856 }
1857
1858 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*),
1859 UM_SLEEP | UM_GC);
1860 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*),
1861 mssp) == -1) {
1862 mdb_warn("failed to read vdev_ms at %p", mssp);
1863 return (WALK_ERR);
1864 }
1865 }
1866
1867 if (mw->mw_curms >= mw->mw_nummss) {
1868 mw->mw_mss = NULL;
1869 mw->mw_curms = 0;
1870 mw->mw_nummss = 0;
1871 mw->mw_curvdev++;
1872 return (WALK_NEXT);
1873 }
1874
1875 msp = mw->mw_mss[mw->mw_curms];
1876 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) {
1877 mdb_warn("failed to read metaslab_t at %p", msp);
1878 return (WALK_ERR);
1879 }
1880
1881 mw->mw_curms++;
1882
1883 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata));
1884 }
1885
1886 static int
1887 metaslab_walk_init(mdb_walk_state_t *wsp)
1888 {
1889 metaslab_walk_data_t *mw;
1890 uintptr_t root_vdevp;
1891 uintptr_t childp;
1892
1893 if (wsp->walk_addr == NULL) {
1894 mdb_warn("must supply address of spa_t\n");
1895 return (WALK_ERR);
1896 }
1897
1898 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC);
1899
1900 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) ||
1901 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) ||
1902 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) {
1903 return (DCMD_ERR);
1904 }
1905
1906 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *),
1907 UM_SLEEP | UM_GC);
1908 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *),
1909 childp) == -1) {
1910 mdb_warn("failed to read root vdev children at %p", childp);
1911 return (DCMD_ERR);
1912 }
1913
1914 wsp->walk_data = mw;
1915
1916 return (WALK_NEXT);
1917 }
1918
1919 typedef struct mdb_spa {
1920 uintptr_t spa_dsl_pool;
1921 uintptr_t spa_root_vdev;
1922 } mdb_spa_t;
1923
1924 typedef struct mdb_dsl_pool {
1925 uintptr_t dp_root_dir;
1926 } mdb_dsl_pool_t;
1927
1928 typedef struct mdb_dsl_dir {
1929 uintptr_t dd_dbuf;
1930 int64_t dd_space_towrite[TXG_SIZE];
1931 } mdb_dsl_dir_t;
1932
1933 typedef struct mdb_dsl_dir_phys {
1934 uint64_t dd_used_bytes;
1935 uint64_t dd_compressed_bytes;
1936 uint64_t dd_uncompressed_bytes;
1937 } mdb_dsl_dir_phys_t;
1938
1939 typedef struct space_data {
1940 uint64_t ms_alloctree[TXG_SIZE];
1941 uint64_t ms_freeingtree;
1942 uint64_t ms_freedtree;
1943 uint64_t ms_tree;
1944 int64_t ms_deferspace;
1945 uint64_t avail;
1946 uint64_t nowavail;
1947 } space_data_t;
1948
1949 /* ARGSUSED */
1950 static int
1951 space_cb(uintptr_t addr, const void *unknown, void *arg)
1952 {
1953 space_data_t *sd = arg;
1954 mdb_metaslab_t ms;
1955 mdb_range_tree_t rt;
1956 mdb_space_map_t sm = { 0 };
1957 mdb_space_map_phys_t smp = { 0 };
1958 int i;
1959
1960 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1961 addr, 0) == -1)
1962 return (WALK_ERR);
1963
1964 for (i = 0; i < TXG_SIZE; i++) {
1965 if (mdb_ctf_vread(&rt, "range_tree_t",
1966 "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1)
1967 return (WALK_ERR);
1968
1969 sd->ms_alloctree[i] += rt.rt_space;
1970
1971 }
1972
1973 if (mdb_ctf_vread(&rt, "range_tree_t",
1974 "mdb_range_tree_t", ms.ms_freeingtree, 0) == -1)
1975 return (WALK_ERR);
1976 sd->ms_freeingtree += rt.rt_space;
1977
1978 if (mdb_ctf_vread(&rt, "range_tree_t",
1979 "mdb_range_tree_t", ms.ms_freedtree, 0) == -1)
1980 return (WALK_ERR);
1981 sd->ms_freedtree += rt.rt_space;
1982
1983 if (mdb_ctf_vread(&rt, "range_tree_t",
1984 "mdb_range_tree_t", ms.ms_tree, 0) == -1)
1985 return (WALK_ERR);
1986 sd->ms_tree += rt.rt_space;
1987
1988 if (ms.ms_sm != NULL &&
1989 mdb_ctf_vread(&sm, "space_map_t",
1990 "mdb_space_map_t", ms.ms_sm, 0) == -1)
1991 return (WALK_ERR);
1992
1993 if (sm.sm_phys != NULL) {
1994 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1995 "mdb_space_map_phys_t", sm.sm_phys, 0);
1996 }
1997
1998 sd->ms_deferspace += ms.ms_deferspace;
1999 sd->avail += sm.sm_size - sm.sm_alloc;
2000 sd->nowavail += sm.sm_size - smp.smp_alloc;
2001
2002 return (WALK_NEXT);
2003 }
2004
2005 /*
2006 * ::spa_space [-b]
2007 *
2008 * Given a spa_t, print out it's on-disk space usage and in-core
2009 * estimates of future usage. If -b is given, print space in bytes.
2010 * Otherwise print in megabytes.
2011 */
2012 /* ARGSUSED */
2013 static int
2014 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2015 {
2016 mdb_spa_t spa;
2017 mdb_dsl_pool_t dp;
2018 mdb_dsl_dir_t dd;
2019 mdb_dmu_buf_impl_t db;
2020 mdb_dsl_dir_phys_t dsp;
2021 space_data_t sd;
2022 int shift = 20;
2023 char *suffix = "M";
2024 int bytes = B_FALSE;
2025
2026 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) !=
2027 argc)
2028 return (DCMD_USAGE);
2029 if (!(flags & DCMD_ADDRSPEC))
2030 return (DCMD_USAGE);
2031
2032 if (bytes) {
2033 shift = 0;
2034 suffix = "";
2035 }
2036
2037 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t",
2038 addr, 0) == -1 ||
2039 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t",
2040 spa.spa_dsl_pool, 0) == -1 ||
2041 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t",
2042 dp.dp_root_dir, 0) == -1 ||
2043 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
2044 dd.dd_dbuf, 0) == -1 ||
2045 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys",
2046 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) {
2047 return (DCMD_ERR);
2048 }
2049
2050 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n",
2051 dd.dd_space_towrite[0] >> shift, suffix,
2052 dd.dd_space_towrite[1] >> shift, suffix,
2053 dd.dd_space_towrite[2] >> shift, suffix,
2054 dd.dd_space_towrite[3] >> shift, suffix);
2055
2056 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n",
2057 dsp.dd_used_bytes >> shift, suffix);
2058 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n",
2059 dsp.dd_compressed_bytes >> shift, suffix);
2060 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n",
2061 dsp.dd_uncompressed_bytes >> shift, suffix);
2062
2063 bzero(&sd, sizeof (sd));
2064 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) {
2065 mdb_warn("can't walk metaslabs");
2066 return (DCMD_ERR);
2067 }
2068
2069 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n",
2070 sd.ms_alloctree[0] >> shift, suffix,
2071 sd.ms_alloctree[1] >> shift, suffix,
2072 sd.ms_alloctree[2] >> shift, suffix,
2073 sd.ms_alloctree[3] >> shift, suffix);
2074 mdb_printf("ms_freeingtree = %llu%s\n",
2075 sd.ms_freeingtree >> shift, suffix);
2076 mdb_printf("ms_freedtree = %llu%s\n",
2077 sd.ms_freedtree >> shift, suffix);
2078 mdb_printf("ms_tree = %llu%s\n",
2079 sd.ms_tree >> shift, suffix);
2080 mdb_printf("ms_deferspace = %llu%s\n",
2081 sd.ms_deferspace >> shift, suffix);
2082 mdb_printf("last synced avail = %llu%s\n",
2083 sd.avail >> shift, suffix);
2084 mdb_printf("current syncing avail = %llu%s\n",
2085 sd.nowavail >> shift, suffix);
2086
2087 return (DCMD_OK);
2088 }
2089
2090 typedef struct mdb_spa_aux_vdev {
2091 int sav_count;
2092 uintptr_t sav_vdevs;
2093 } mdb_spa_aux_vdev_t;
2094
2095 typedef struct mdb_spa_vdevs {
2096 uintptr_t spa_root_vdev;
2097 mdb_spa_aux_vdev_t spa_l2cache;
2098 mdb_spa_aux_vdev_t spa_spares;
2099 } mdb_spa_vdevs_t;
2100
2101 static int
2102 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v,
2103 const char *name)
2104 {
2105 uintptr_t *aux;
2106 size_t len;
2107 int ret, i;
2108
2109 /*
2110 * Iterate over aux vdevs and print those out as well. This is a
2111 * little annoying because we don't have a root vdev to pass to ::vdev.
2112 * Instead, we print a single line and then call it for each child
2113 * vdev.
2114 */
2115 if (sav->sav_count != 0) {
2116 v[1].a_type = MDB_TYPE_STRING;
2117 v[1].a_un.a_str = "-d";
2118 v[2].a_type = MDB_TYPE_IMMEDIATE;
2119 v[2].a_un.a_val = 2;
2120
2121 len = sav->sav_count * sizeof (uintptr_t);
2122 aux = mdb_alloc(len, UM_SLEEP);
2123 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) {
2124 mdb_free(aux, len);
2125 mdb_warn("failed to read l2cache vdevs at %p",
2126 sav->sav_vdevs);
2127 return (DCMD_ERR);
2128 }
2129
2130 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name);
2131
2132 for (i = 0; i < sav->sav_count; i++) {
2133 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v);
2134 if (ret != DCMD_OK) {
2135 mdb_free(aux, len);
2136 return (ret);
2137 }
2138 }
2139
2140 mdb_free(aux, len);
2141 }
2142
2143 return (0);
2144 }
2145
2146 /*
2147 * ::spa_vdevs
2148 *
2149 * -e Include error stats
2150 * -m Include metaslab information
2151 * -M Include metaslab group information
2152 * -h Include histogram information (requires -m or -M)
2153 *
2154 * Print out a summarized list of vdevs for the given spa_t.
2155 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as
2156 * iterating over the cache devices.
2157 */
2158 /* ARGSUSED */
2159 static int
2160 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2161 {
2162 mdb_arg_t v[3];
2163 int ret;
2164 char opts[100] = "-r";
2165 int spa_flags = 0;
2166
2167 if (mdb_getopts(argc, argv,
2168 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
2169 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
2170 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
2171 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
2172 NULL) != argc)
2173 return (DCMD_USAGE);
2174
2175 if (!(flags & DCMD_ADDRSPEC))
2176 return (DCMD_USAGE);
2177
2178 mdb_spa_vdevs_t spa;
2179 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1)
2180 return (DCMD_ERR);
2181
2182 /*
2183 * Unitialized spa_t structures can have a NULL root vdev.
2184 */
2185 if (spa.spa_root_vdev == NULL) {
2186 mdb_printf("no associated vdevs\n");
2187 return (DCMD_OK);
2188 }
2189
2190 if (spa_flags & SPA_FLAG_ERRORS)
2191 strcat(opts, "e");
2192 if (spa_flags & SPA_FLAG_METASLABS)
2193 strcat(opts, "m");
2194 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
2195 strcat(opts, "M");
2196 if (spa_flags & SPA_FLAG_HISTOGRAMS)
2197 strcat(opts, "h");
2198
2199 v[0].a_type = MDB_TYPE_STRING;
2200 v[0].a_un.a_str = opts;
2201
2202 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev,
2203 flags, 1, v);
2204 if (ret != DCMD_OK)
2205 return (ret);
2206
2207 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 ||
2208 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0)
2209 return (DCMD_ERR);
2210
2211 return (DCMD_OK);
2212 }
2213
2214 /*
2215 * ::zio
2216 *
2217 * Print a summary of zio_t and all its children. This is intended to display a
2218 * zio tree, and hence we only pick the most important pieces of information for
2219 * the main summary. More detailed information can always be found by doing a
2220 * '::print zio' on the underlying zio_t. The columns we display are:
2221 *
2222 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED
2223 *
2224 * The 'address' column is indented by one space for each depth level as we
2225 * descend down the tree.
2226 */
2227
2228 #define ZIO_MAXINDENT 7
2229 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT)
2230 #define ZIO_WALK_SELF 0
2231 #define ZIO_WALK_CHILD 1
2232 #define ZIO_WALK_PARENT 2
2233
2234 typedef struct zio_print_args {
2235 int zpa_current_depth;
2236 int zpa_min_depth;
2237 int zpa_max_depth;
2238 int zpa_type;
2239 uint_t zpa_flags;
2240 } zio_print_args_t;
2241
2242 typedef struct mdb_zio {
2243 enum zio_type io_type;
2244 enum zio_stage io_stage;
2245 uintptr_t io_waiter;
2246 uintptr_t io_spa;
2247 struct {
2248 struct {
2249 uintptr_t list_next;
2250 } list_head;
2251 } io_parent_list;
2252 int io_error;
2253 } mdb_zio_t;
2254
2255 typedef struct mdb_zio_timestamp {
2256 hrtime_t io_timestamp;
2257 } mdb_zio_timestamp_t;
2258
2259 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg);
2260
2261 static int
2262 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa)
2263 {
2264 mdb_ctf_id_t type_enum, stage_enum;
2265 int indent = zpa->zpa_current_depth;
2266 const char *type, *stage;
2267 uintptr_t laddr;
2268 mdb_zio_t zio;
2269 mdb_zio_timestamp_t zio_timestamp = { 0 };
2270
2271 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1)
2272 return (WALK_ERR);
2273 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio",
2274 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET);
2275
2276 if (indent > ZIO_MAXINDENT)
2277 indent = ZIO_MAXINDENT;
2278
2279 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 ||
2280 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) {
2281 mdb_warn("failed to lookup zio enums");
2282 return (WALK_ERR);
2283 }
2284
2285 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL)
2286 type += sizeof ("ZIO_TYPE_") - 1;
2287 else
2288 type = "?";
2289
2290 if (zio.io_error == 0) {
2291 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage);
2292 if (stage != NULL)
2293 stage += sizeof ("ZIO_STAGE_") - 1;
2294 else
2295 stage = "?";
2296 } else {
2297 stage = "FAILED";
2298 }
2299
2300 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) {
2301 if (zpa->zpa_flags & DCMD_PIPE_OUT) {
2302 mdb_printf("%?p\n", addr);
2303 } else {
2304 mdb_printf("%*s%-*p %-5s %-16s ", indent, "",
2305 ZIO_MAXWIDTH - indent, addr, type, stage);
2306 if (zio.io_waiter != 0)
2307 mdb_printf("%-16lx ", zio.io_waiter);
2308 else
2309 mdb_printf("%-16s ", "-");
2310 #ifdef _KERNEL
2311 if (zio_timestamp.io_timestamp != 0) {
2312 mdb_printf("%llums", (mdb_gethrtime() -
2313 zio_timestamp.io_timestamp) /
2314 1000000);
2315 } else {
2316 mdb_printf("%-12s ", "-");
2317 }
2318 #else
2319 mdb_printf("%-12s ", "-");
2320 #endif
2321 mdb_printf("\n");
2322 }
2323 }
2324
2325 if (zpa->zpa_current_depth >= zpa->zpa_max_depth)
2326 return (WALK_NEXT);
2327
2328 if (zpa->zpa_type == ZIO_WALK_PARENT)
2329 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2330 "io_parent_list");
2331 else
2332 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2333 "io_child_list");
2334
2335 zpa->zpa_current_depth++;
2336 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) {
2337 mdb_warn("failed to walk zio_t children at %p\n", laddr);
2338 return (WALK_ERR);
2339 }
2340 zpa->zpa_current_depth--;
2341
2342 return (WALK_NEXT);
2343 }
2344
2345 /* ARGSUSED */
2346 static int
2347 zio_child_cb(uintptr_t addr, const void *unknown, void *arg)
2348 {
2349 zio_link_t zl;
2350 uintptr_t ziop;
2351 zio_print_args_t *zpa = arg;
2352
2353 if (mdb_vread(&zl, sizeof (zl), addr) == -1) {
2354 mdb_warn("failed to read zio_link_t at %p", addr);
2355 return (WALK_ERR);
2356 }
2357
2358 if (zpa->zpa_type == ZIO_WALK_PARENT)
2359 ziop = (uintptr_t)zl.zl_parent;
2360 else
2361 ziop = (uintptr_t)zl.zl_child;
2362
2363 return (zio_print_cb(ziop, zpa));
2364 }
2365
2366 /* ARGSUSED */
2367 static int
2368 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2369 {
2370 zio_print_args_t zpa = { 0 };
2371
2372 if (!(flags & DCMD_ADDRSPEC))
2373 return (DCMD_USAGE);
2374
2375 if (mdb_getopts(argc, argv,
2376 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth,
2377 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type,
2378 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type,
2379 NULL) != argc)
2380 return (DCMD_USAGE);
2381
2382 zpa.zpa_flags = flags;
2383 if (zpa.zpa_max_depth != 0) {
2384 if (zpa.zpa_type == ZIO_WALK_SELF)
2385 zpa.zpa_type = ZIO_WALK_CHILD;
2386 } else if (zpa.zpa_type != ZIO_WALK_SELF) {
2387 zpa.zpa_min_depth = 1;
2388 zpa.zpa_max_depth = 1;
2389 }
2390
2391 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) {
2392 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n",
2393 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER",
2394 "TIME_ELAPSED");
2395 }
2396
2397 if (zio_print_cb(addr, &zpa) != WALK_NEXT)
2398 return (DCMD_ERR);
2399
2400 return (DCMD_OK);
2401 }
2402
2403 /*
2404 * [addr]::zio_state
2405 *
2406 * Print a summary of all zio_t structures on the system, or for a particular
2407 * pool. This is equivalent to '::walk zio_root | ::zio'.
2408 */
2409 /*ARGSUSED*/
2410 static int
2411 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2412 {
2413 /*
2414 * MDB will remember the last address of the pipeline, so if we don't
2415 * zero this we'll end up trying to walk zio structures for a
2416 * non-existent spa_t.
2417 */
2418 if (!(flags & DCMD_ADDRSPEC))
2419 addr = 0;
2420
2421 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr));
2422 }
2423
2424 typedef struct mdb_multilist {
2425 uint64_t ml_num_sublists;
2426 uintptr_t ml_sublists;
2427 } mdb_multilist_t;
2428
2429 typedef struct multilist_walk_data {
2430 uint64_t mwd_idx;
2431 mdb_multilist_t mwd_ml;
2432 } multilist_walk_data_t;
2433
2434 /* ARGSUSED */
2435 static int
2436 multilist_print_cb(uintptr_t addr, const void *unknown, void *arg)
2437 {
2438 mdb_printf("%#lr\n", addr);
2439 return (WALK_NEXT);
2440 }
2441
2442 static int
2443 multilist_walk_step(mdb_walk_state_t *wsp)
2444 {
2445 multilist_walk_data_t *mwd = wsp->walk_data;
2446
2447 if (mwd->mwd_idx >= mwd->mwd_ml.ml_num_sublists)
2448 return (WALK_DONE);
2449
2450 wsp->walk_addr = mwd->mwd_ml.ml_sublists +
2451 mdb_ctf_sizeof_by_name("multilist_sublist_t") * mwd->mwd_idx +
2452 mdb_ctf_offsetof_by_name("multilist_sublist_t", "mls_list");
2453
2454 mdb_pwalk("list", multilist_print_cb, (void*)NULL, wsp->walk_addr);
2455 mwd->mwd_idx++;
2456
2457 return (WALK_NEXT);
2458 }
2459
2460 static int
2461 multilist_walk_init(mdb_walk_state_t *wsp)
2462 {
2463 multilist_walk_data_t *mwd;
2464
2465 if (wsp->walk_addr == NULL) {
2466 mdb_warn("must supply address of multilist_t\n");
2467 return (WALK_ERR);
2468 }
2469
2470 mwd = mdb_zalloc(sizeof (multilist_walk_data_t), UM_SLEEP | UM_GC);
2471 if (mdb_ctf_vread(&mwd->mwd_ml, "multilist_t", "mdb_multilist_t",
2472 wsp->walk_addr, 0) == -1) {
2473 return (WALK_ERR);
2474 }
2475
2476 if (mwd->mwd_ml.ml_num_sublists == 0 ||
2477 mwd->mwd_ml.ml_sublists == NULL) {
2478 mdb_warn("invalid or uninitialized multilist at %#lx\n",
2479 wsp->walk_addr);
2480 return (WALK_ERR);
2481 }
2482
2483 wsp->walk_data = mwd;
2484 return (WALK_NEXT);
2485 }
2486
2487 typedef struct mdb_txg_list {
2488 size_t tl_offset;
2489 uintptr_t tl_head[TXG_SIZE];
2490 } mdb_txg_list_t;
2491
2492 typedef struct txg_list_walk_data {
2493 uintptr_t lw_head[TXG_SIZE];
2494 int lw_txgoff;
2495 int lw_maxoff;
2496 size_t lw_offset;
2497 void *lw_obj;
2498 } txg_list_walk_data_t;
2499
2500 static int
2501 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff)
2502 {
2503 txg_list_walk_data_t *lwd;
2504 mdb_txg_list_t list;
2505 int i;
2506
2507 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC);
2508 if (mdb_ctf_vread(&list, "txg_list_t", "mdb_txg_list_t", wsp->walk_addr,
2509 0) == -1) {
2510 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr);
2511 return (WALK_ERR);
2512 }
2513
2514 for (i = 0; i < TXG_SIZE; i++)
2515 lwd->lw_head[i] = list.tl_head[i];
2516 lwd->lw_offset = list.tl_offset;
2517 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t),
2518 UM_SLEEP | UM_GC);
2519 lwd->lw_txgoff = txg;
2520 lwd->lw_maxoff = maxoff;
2521
2522 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2523 wsp->walk_data = lwd;
2524
2525 return (WALK_NEXT);
2526 }
2527
2528 static int
2529 txg_list_walk_init(mdb_walk_state_t *wsp)
2530 {
2531 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1));
2532 }
2533
2534 static int
2535 txg_list0_walk_init(mdb_walk_state_t *wsp)
2536 {
2537 return (txg_list_walk_init_common(wsp, 0, 0));
2538 }
2539
2540 static int
2541 txg_list1_walk_init(mdb_walk_state_t *wsp)
2542 {
2543 return (txg_list_walk_init_common(wsp, 1, 1));
2544 }
2545
2546 static int
2547 txg_list2_walk_init(mdb_walk_state_t *wsp)
2548 {
2549 return (txg_list_walk_init_common(wsp, 2, 2));
2550 }
2551
2552 static int
2553 txg_list3_walk_init(mdb_walk_state_t *wsp)
2554 {
2555 return (txg_list_walk_init_common(wsp, 3, 3));
2556 }
2557
2558 static int
2559 txg_list_walk_step(mdb_walk_state_t *wsp)
2560 {
2561 txg_list_walk_data_t *lwd = wsp->walk_data;
2562 uintptr_t addr;
2563 txg_node_t *node;
2564 int status;
2565
2566 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) {
2567 lwd->lw_txgoff++;
2568 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2569 }
2570
2571 if (wsp->walk_addr == NULL)
2572 return (WALK_DONE);
2573
2574 addr = wsp->walk_addr - lwd->lw_offset;
2575
2576 if (mdb_vread(lwd->lw_obj,
2577 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) {
2578 mdb_warn("failed to read list element at %#lx", addr);
2579 return (WALK_ERR);
2580 }
2581
2582 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata);
2583 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset);
2584 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff];
2585
2586 return (status);
2587 }
2588
2589 /*
2590 * ::walk spa
2591 *
2592 * Walk all named spa_t structures in the namespace. This is nothing more than
2593 * a layered avl walk.
2594 */
2595 static int
2596 spa_walk_init(mdb_walk_state_t *wsp)
2597 {
2598 GElf_Sym sym;
2599
2600 if (wsp->walk_addr != NULL) {
2601 mdb_warn("spa walk only supports global walks\n");
2602 return (WALK_ERR);
2603 }
2604
2605 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) {
2606 mdb_warn("failed to find symbol 'spa_namespace_avl'");
2607 return (WALK_ERR);
2608 }
2609
2610 wsp->walk_addr = (uintptr_t)sym.st_value;
2611
2612 if (mdb_layered_walk("avl", wsp) == -1) {
2613 mdb_warn("failed to walk 'avl'\n");
2614 return (WALK_ERR);
2615 }
2616
2617 return (WALK_NEXT);
2618 }
2619
2620 static int
2621 spa_walk_step(mdb_walk_state_t *wsp)
2622 {
2623 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata));
2624 }
2625
2626 /*
2627 * [addr]::walk zio
2628 *
2629 * Walk all active zio_t structures on the system. This is simply a layered
2630 * walk on top of ::walk zio_cache, with the optional ability to limit the
2631 * structures to a particular pool.
2632 */
2633 static int
2634 zio_walk_init(mdb_walk_state_t *wsp)
2635 {
2636 wsp->walk_data = (void *)wsp->walk_addr;
2637
2638 if (mdb_layered_walk("zio_cache", wsp) == -1) {
2639 mdb_warn("failed to walk 'zio_cache'\n");
2640 return (WALK_ERR);
2641 }
2642
2643 return (WALK_NEXT);
2644 }
2645
2646 static int
2647 zio_walk_step(mdb_walk_state_t *wsp)
2648 {
2649 mdb_zio_t zio;
2650 uintptr_t spa = (uintptr_t)wsp->walk_data;
2651
2652 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2653 wsp->walk_addr, 0) == -1)
2654 return (WALK_ERR);
2655
2656 if (spa != 0 && spa != zio.io_spa)
2657 return (WALK_NEXT);
2658
2659 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2660 }
2661
2662 /*
2663 * [addr]::walk zio_root
2664 *
2665 * Walk only root zio_t structures, optionally for a particular spa_t.
2666 */
2667 static int
2668 zio_walk_root_step(mdb_walk_state_t *wsp)
2669 {
2670 mdb_zio_t zio;
2671 uintptr_t spa = (uintptr_t)wsp->walk_data;
2672
2673 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2674 wsp->walk_addr, 0) == -1)
2675 return (WALK_ERR);
2676
2677 if (spa != 0 && spa != zio.io_spa)
2678 return (WALK_NEXT);
2679
2680 /* If the parent list is not empty, ignore */
2681 if (zio.io_parent_list.list_head.list_next !=
2682 wsp->walk_addr +
2683 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") +
2684 mdb_ctf_offsetof_by_name("struct list", "list_head"))
2685 return (WALK_NEXT);
2686
2687 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2688 }
2689
2690 /*
2691 * ::zfs_blkstats
2692 *
2693 * -v print verbose per-level information
2694 *
2695 */
2696 static int
2697 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2698 {
2699 boolean_t verbose = B_FALSE;
2700 zfs_all_blkstats_t stats;
2701 dmu_object_type_t t;
2702 zfs_blkstat_t *tzb;
2703 uint64_t ditto;
2704 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10];
2705 /* +10 in case it grew */
2706
2707 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) {
2708 mdb_warn("failed to read 'dmu_ot'");
2709 return (DCMD_ERR);
2710 }
2711
2712 if (mdb_getopts(argc, argv,
2713 'v', MDB_OPT_SETBITS, TRUE, &verbose,
2714 NULL) != argc)
2715 return (DCMD_USAGE);
2716
2717 if (!(flags & DCMD_ADDRSPEC))
2718 return (DCMD_USAGE);
2719
2720 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) ||
2721 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) ||
2722 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) {
2723 mdb_warn("failed to read data at %p;", addr);
2724 mdb_printf("maybe no stats? run \"zpool scrub\" first.");
2725 return (DCMD_ERR);
2726 }
2727
2728 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL];
2729 if (tzb->zb_gangs != 0) {
2730 mdb_printf("Ganged blocks: %llu\n",
2731 (longlong_t)tzb->zb_gangs);
2732 }
2733
2734 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev +
2735 tzb->zb_ditto_3_of_3_samevdev;
2736 if (ditto != 0) {
2737 mdb_printf("Dittoed blocks on same vdev: %llu\n",
2738 (longlong_t)ditto);
2739 }
2740
2741 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2742 "\t avg\t comp\t%%Total\tType\n");
2743
2744 for (t = 0; t <= DMU_OT_TOTAL; t++) {
2745 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN];
2746 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN];
2747 char avg[NICENUM_BUFLEN];
2748 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN];
2749 char typename[64];
2750 int l;
2751
2752
2753 if (t == DMU_OT_DEFERRED)
2754 strcpy(typename, "deferred free");
2755 else if (t == DMU_OT_OTHER)
2756 strcpy(typename, "other");
2757 else if (t == DMU_OT_TOTAL)
2758 strcpy(typename, "Total");
2759 else if (mdb_readstr(typename, sizeof (typename),
2760 (uintptr_t)dmu_ot[t].ot_name) == -1) {
2761 mdb_warn("failed to read type name");
2762 return (DCMD_ERR);
2763 }
2764
2765 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0)
2766 continue;
2767
2768 for (l = -1; l < DN_MAX_LEVELS; l++) {
2769 int level = (l == -1 ? DN_MAX_LEVELS : l);
2770 zfs_blkstat_t *zb = &stats.zab_type[level][t];
2771
2772 if (zb->zb_asize == 0)
2773 continue;
2774
2775 /*
2776 * Don't print each level unless requested.
2777 */
2778 if (!verbose && level != DN_MAX_LEVELS)
2779 continue;
2780
2781 /*
2782 * If all the space is level 0, don't print the
2783 * level 0 separately.
2784 */
2785 if (level == 0 && zb->zb_asize ==
2786 stats.zab_type[DN_MAX_LEVELS][t].zb_asize)
2787 continue;
2788
2789 mdb_nicenum(zb->zb_count, csize);
2790 mdb_nicenum(zb->zb_lsize, lsize);
2791 mdb_nicenum(zb->zb_psize, psize);
2792 mdb_nicenum(zb->zb_asize, asize);
2793 mdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2794 (void) snprintfrac(comp, NICENUM_BUFLEN,
2795 zb->zb_lsize, zb->zb_psize, 2);
2796 (void) snprintfrac(pct, NICENUM_BUFLEN,
2797 100 * zb->zb_asize, tzb->zb_asize, 2);
2798
2799 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s"
2800 "\t%5s\t%6s\t",
2801 csize, lsize, psize, asize, avg, comp, pct);
2802
2803 if (level == DN_MAX_LEVELS)
2804 mdb_printf("%s\n", typename);
2805 else
2806 mdb_printf(" L%d %s\n",
2807 level, typename);
2808 }
2809 }
2810
2811 return (DCMD_OK);
2812 }
2813
2814 typedef struct mdb_reference {
2815 uintptr_t ref_holder;
2816 uintptr_t ref_removed;
2817 uint64_t ref_number;
2818 } mdb_reference_t;
2819
2820 /* ARGSUSED */
2821 static int
2822 reference_cb(uintptr_t addr, const void *ignored, void *arg)
2823 {
2824 mdb_reference_t ref;
2825 boolean_t holder_is_str = B_FALSE;
2826 char holder_str[128];
2827 boolean_t removed = (boolean_t)arg;
2828
2829 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr,
2830 0) == -1)
2831 return (DCMD_ERR);
2832
2833 if (mdb_readstr(holder_str, sizeof (holder_str),
2834 ref.ref_holder) != -1)
2835 holder_is_str = strisprint(holder_str);
2836
2837 if (removed)
2838 mdb_printf("removed ");
2839 mdb_printf("reference ");
2840 if (ref.ref_number != 1)
2841 mdb_printf("with count=%llu ", ref.ref_number);
2842 mdb_printf("with tag %lx", ref.ref_holder);
2843 if (holder_is_str)
2844 mdb_printf(" \"%s\"", holder_str);
2845 mdb_printf(", held at:\n");
2846
2847 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
2848
2849 if (removed) {
2850 mdb_printf("removed at:\n");
2851 (void) mdb_call_dcmd("whatis", ref.ref_removed,
2852 DCMD_ADDRSPEC, 0, NULL);
2853 }
2854
2855 mdb_printf("\n");
2856
2857 return (WALK_NEXT);
2858 }
2859
2860 typedef struct mdb_refcount {
2861 uint64_t rc_count;
2862 } mdb_refcount_t;
2863
2864 typedef struct mdb_refcount_removed {
2865 uint64_t rc_removed_count;
2866 } mdb_refcount_removed_t;
2867
2868 typedef struct mdb_refcount_tracked {
2869 boolean_t rc_tracked;
2870 } mdb_refcount_tracked_t;
2871
2872 /* ARGSUSED */
2873 static int
2874 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2875 {
2876 mdb_refcount_t rc;
2877 mdb_refcount_removed_t rcr;
2878 mdb_refcount_tracked_t rct;
2879 int off;
2880 boolean_t released = B_FALSE;
2881
2882 if (!(flags & DCMD_ADDRSPEC))
2883 return (DCMD_USAGE);
2884
2885 if (mdb_getopts(argc, argv,
2886 'r', MDB_OPT_SETBITS, B_TRUE, &released,
2887 NULL) != argc)
2888 return (DCMD_USAGE);
2889
2890 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr,
2891 0) == -1)
2892 return (DCMD_ERR);
2893
2894 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr,
2895 MDB_CTF_VREAD_QUIET) == -1) {
2896 mdb_printf("refcount_t at %p has %llu holds (untracked)\n",
2897 addr, (longlong_t)rc.rc_count);
2898 return (DCMD_OK);
2899 }
2900
2901 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr,
2902 MDB_CTF_VREAD_QUIET) == -1) {
2903 /* If this is an old target, it might be tracked. */
2904 rct.rc_tracked = B_TRUE;
2905 }
2906
2907 mdb_printf("refcount_t at %p has %llu current holds, "
2908 "%llu recently released holds\n",
2909 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count);
2910
2911 if (rct.rc_tracked && rc.rc_count > 0)
2912 mdb_printf("current holds:\n");
2913 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list");
2914 if (off == -1)
2915 return (DCMD_ERR);
2916 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off);
2917
2918 if (released && rcr.rc_removed_count > 0) {
2919 mdb_printf("released holds:\n");
2920
2921 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed");
2922 if (off == -1)
2923 return (DCMD_ERR);
2924 mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off);
2925 }
2926
2927 return (DCMD_OK);
2928 }
2929
2930 /* ARGSUSED */
2931 static int
2932 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2933 {
2934 sa_attr_table_t *table;
2935 sa_os_t sa_os;
2936 char *name;
2937 int i;
2938
2939 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) {
2940 mdb_warn("failed to read sa_os at %p", addr);
2941 return (DCMD_ERR);
2942 }
2943
2944 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2945 UM_SLEEP | UM_GC);
2946 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC);
2947
2948 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2949 (uintptr_t)sa_os.sa_attr_table) == -1) {
2950 mdb_warn("failed to read sa_os at %p", addr);
2951 return (DCMD_ERR);
2952 }
2953
2954 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n",
2955 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME");
2956 for (i = 0; i != sa_os.sa_num_attrs; i++) {
2957 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name);
2958 mdb_printf("%5x %8x %8x %8x %-s\n",
2959 (int)table[i].sa_attr, (int)table[i].sa_registered,
2960 (int)table[i].sa_length, table[i].sa_byteswap, name);
2961 }
2962
2963 return (DCMD_OK);
2964 }
2965
2966 static int
2967 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count)
2968 {
2969 uintptr_t idx_table;
2970
2971 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) {
2972 mdb_printf("can't find offset table in sa_idx_tab\n");
2973 return (-1);
2974 }
2975
2976 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t),
2977 UM_SLEEP | UM_GC);
2978
2979 if (mdb_vread(*off_tab,
2980 attr_count * sizeof (uint32_t), idx_table) == -1) {
2981 mdb_warn("failed to attribute offset table %p", idx_table);
2982 return (-1);
2983 }
2984
2985 return (DCMD_OK);
2986 }
2987
2988 /*ARGSUSED*/
2989 static int
2990 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2991 {
2992 uint32_t *offset_tab;
2993 int attr_count;
2994 uint64_t attr_id;
2995 uintptr_t attr_addr;
2996 uintptr_t bonus_tab, spill_tab;
2997 uintptr_t db_bonus, db_spill;
2998 uintptr_t os, os_sa;
2999 uintptr_t db_data;
3000
3001 if (argc != 1)
3002 return (DCMD_USAGE);
3003
3004 if (argv[0].a_type == MDB_TYPE_STRING)
3005 attr_id = mdb_strtoull(argv[0].a_un.a_str);
3006 else
3007 return (DCMD_USAGE);
3008
3009 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) ||
3010 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) ||
3011 GETMEMB(addr, "sa_handle", sa_os, os) ||
3012 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) ||
3013 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) {
3014 mdb_printf("Can't find necessary information in sa_handle "
3015 "in sa_handle\n");
3016 return (DCMD_ERR);
3017 }
3018
3019 if (GETMEMB(os, "objset", os_sa, os_sa)) {
3020 mdb_printf("Can't find os_sa in objset\n");
3021 return (DCMD_ERR);
3022 }
3023
3024 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) {
3025 mdb_printf("Can't find sa_num_attrs\n");
3026 return (DCMD_ERR);
3027 }
3028
3029 if (attr_id > attr_count) {
3030 mdb_printf("attribute id number is out of range\n");
3031 return (DCMD_ERR);
3032 }
3033
3034 if (bonus_tab) {
3035 if (sa_get_off_table(bonus_tab, &offset_tab,
3036 attr_count) == -1) {
3037 return (DCMD_ERR);
3038 }
3039
3040 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) {
3041 mdb_printf("can't find db_data in bonus dbuf\n");
3042 return (DCMD_ERR);
3043 }
3044 }
3045
3046 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) &&
3047 spill_tab == NULL) {
3048 mdb_printf("Attribute does not exist\n");
3049 return (DCMD_ERR);
3050 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) {
3051 if (sa_get_off_table(spill_tab, &offset_tab,
3052 attr_count) == -1) {
3053 return (DCMD_ERR);
3054 }
3055 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) {
3056 mdb_printf("can't find db_data in spill dbuf\n");
3057 return (DCMD_ERR);
3058 }
3059 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) {
3060 mdb_printf("Attribute does not exist\n");
3061 return (DCMD_ERR);
3062 }
3063 }
3064 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]);
3065 mdb_printf("%p\n", attr_addr);
3066 return (DCMD_OK);
3067 }
3068
3069 /* ARGSUSED */
3070 static int
3071 zfs_ace_print_common(uintptr_t addr, uint_t flags,
3072 uint64_t id, uint32_t access_mask, uint16_t ace_flags,
3073 uint16_t ace_type, int verbose)
3074 {
3075 if (DCMD_HDRSPEC(flags) && !verbose)
3076 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n",
3077 "ADDR", "FLAGS", "MASK", "TYPE", "ID");
3078
3079 if (!verbose) {
3080 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr,
3081 ace_flags, access_mask, ace_type, id);
3082 return (DCMD_OK);
3083 }
3084
3085 switch (ace_flags & ACE_TYPE_FLAGS) {
3086 case ACE_OWNER:
3087 mdb_printf("owner@:");
3088 break;
3089 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
3090 mdb_printf("group@:");
3091 break;
3092 case ACE_EVERYONE:
3093 mdb_printf("everyone@:");
3094 break;
3095 case ACE_IDENTIFIER_GROUP:
3096 mdb_printf("group:%llx:", (u_longlong_t)id);
3097 break;
3098 case 0: /* User entry */
3099 mdb_printf("user:%llx:", (u_longlong_t)id);
3100 break;
3101 }
3102
3103 /* print out permission mask */
3104 if (access_mask & ACE_READ_DATA)
3105 mdb_printf("r");
3106 else
3107 mdb_printf("-");
3108 if (access_mask & ACE_WRITE_DATA)
3109 mdb_printf("w");
3110 else
3111 mdb_printf("-");
3112 if (access_mask & ACE_EXECUTE)
3113 mdb_printf("x");
3114 else
3115 mdb_printf("-");
3116 if (access_mask & ACE_APPEND_DATA)
3117 mdb_printf("p");
3118 else
3119 mdb_printf("-");
3120 if (access_mask & ACE_DELETE)
3121 mdb_printf("d");
3122 else
3123 mdb_printf("-");
3124 if (access_mask & ACE_DELETE_CHILD)
3125 mdb_printf("D");
3126 else
3127 mdb_printf("-");
3128 if (access_mask & ACE_READ_ATTRIBUTES)
3129 mdb_printf("a");
3130 else
3131 mdb_printf("-");
3132 if (access_mask & ACE_WRITE_ATTRIBUTES)
3133 mdb_printf("A");
3134 else
3135 mdb_printf("-");
3136 if (access_mask & ACE_READ_NAMED_ATTRS)
3137 mdb_printf("R");
3138 else
3139 mdb_printf("-");
3140 if (access_mask & ACE_WRITE_NAMED_ATTRS)
3141 mdb_printf("W");
3142 else
3143 mdb_printf("-");
3144 if (access_mask & ACE_READ_ACL)
3145 mdb_printf("c");
3146 else
3147 mdb_printf("-");
3148 if (access_mask & ACE_WRITE_ACL)
3149 mdb_printf("C");
3150 else
3151 mdb_printf("-");
3152 if (access_mask & ACE_WRITE_OWNER)
3153 mdb_printf("o");
3154 else
3155 mdb_printf("-");
3156 if (access_mask & ACE_SYNCHRONIZE)
3157 mdb_printf("s");
3158 else
3159 mdb_printf("-");
3160
3161 mdb_printf(":");
3162
3163 /* Print out inheritance flags */
3164 if (ace_flags & ACE_FILE_INHERIT_ACE)
3165 mdb_printf("f");
3166 else
3167 mdb_printf("-");
3168 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE)
3169 mdb_printf("d");
3170 else
3171 mdb_printf("-");
3172 if (ace_flags & ACE_INHERIT_ONLY_ACE)
3173 mdb_printf("i");
3174 else
3175 mdb_printf("-");
3176 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE)
3177 mdb_printf("n");
3178 else
3179 mdb_printf("-");
3180 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)
3181 mdb_printf("S");
3182 else
3183 mdb_printf("-");
3184 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG)
3185 mdb_printf("F");
3186 else
3187 mdb_printf("-");
3188 if (ace_flags & ACE_INHERITED_ACE)
3189 mdb_printf("I");
3190 else
3191 mdb_printf("-");
3192
3193 switch (ace_type) {
3194 case ACE_ACCESS_ALLOWED_ACE_TYPE:
3195 mdb_printf(":allow\n");
3196 break;
3197 case ACE_ACCESS_DENIED_ACE_TYPE:
3198 mdb_printf(":deny\n");
3199 break;
3200 case ACE_SYSTEM_AUDIT_ACE_TYPE:
3201 mdb_printf(":audit\n");
3202 break;
3203 case ACE_SYSTEM_ALARM_ACE_TYPE:
3204 mdb_printf(":alarm\n");
3205 break;
3206 default:
3207 mdb_printf(":?\n");
3208 }
3209 return (DCMD_OK);
3210 }
3211
3212 /* ARGSUSED */
3213 static int
3214 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3215 {
3216 zfs_ace_t zace;
3217 int verbose = FALSE;
3218 uint64_t id;
3219
3220 if (!(flags & DCMD_ADDRSPEC))
3221 return (DCMD_USAGE);
3222
3223 if (mdb_getopts(argc, argv,
3224 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3225 return (DCMD_USAGE);
3226
3227 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) {
3228 mdb_warn("failed to read zfs_ace_t");
3229 return (DCMD_ERR);
3230 }
3231
3232 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 ||
3233 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
3234 id = zace.z_fuid;
3235 else
3236 id = -1;
3237
3238 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask,
3239 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose));
3240 }
3241
3242 /* ARGSUSED */
3243 static int
3244 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3245 {
3246 ace_t ace;
3247 uint64_t id;
3248 int verbose = FALSE;
3249
3250 if (!(flags & DCMD_ADDRSPEC))
3251 return (DCMD_USAGE);
3252
3253 if (mdb_getopts(argc, argv,
3254 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3255 return (DCMD_USAGE);
3256
3257 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) {
3258 mdb_warn("failed to read ace_t");
3259 return (DCMD_ERR);
3260 }
3261
3262 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 ||
3263 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
3264 id = ace.a_who;
3265 else
3266 id = -1;
3267
3268 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask,
3269 ace.a_flags, ace.a_type, verbose));
3270 }
3271
3272 typedef struct acl_dump_args {
3273 int a_argc;
3274 const mdb_arg_t *a_argv;
3275 uint16_t a_version;
3276 int a_flags;
3277 } acl_dump_args_t;
3278
3279 /* ARGSUSED */
3280 static int
3281 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg)
3282 {
3283 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
3284
3285 if (acl_args->a_version == 1) {
3286 if (mdb_call_dcmd("zfs_ace", addr,
3287 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
3288 acl_args->a_argv) != DCMD_OK) {
3289 return (WALK_ERR);
3290 }
3291 } else {
3292 if (mdb_call_dcmd("zfs_ace0", addr,
3293 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
3294 acl_args->a_argv) != DCMD_OK) {
3295 return (WALK_ERR);
3296 }
3297 }
3298 acl_args->a_flags = DCMD_LOOP;
3299 return (WALK_NEXT);
3300 }
3301
3302 /* ARGSUSED */
3303 static int
3304 acl_cb(uintptr_t addr, const void *unknown, void *arg)
3305 {
3306 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
3307
3308 if (acl_args->a_version == 1) {
3309 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb,
3310 arg, addr) != 0) {
3311 mdb_warn("can't walk ACEs");
3312 return (DCMD_ERR);
3313 }
3314 } else {
3315 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb,
3316 arg, addr) != 0) {
3317 mdb_warn("can't walk ACEs");
3318 return (DCMD_ERR);
3319 }
3320 }
3321 return (WALK_NEXT);
3322 }
3323
3324 /* ARGSUSED */
3325 static int
3326 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3327 {
3328 zfs_acl_t zacl;
3329 int verbose = FALSE;
3330 acl_dump_args_t acl_args;
3331
3332 if (!(flags & DCMD_ADDRSPEC))
3333 return (DCMD_USAGE);
3334
3335 if (mdb_getopts(argc, argv,
3336 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3337 return (DCMD_USAGE);
3338
3339 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) {
3340 mdb_warn("failed to read zfs_acl_t");
3341 return (DCMD_ERR);
3342 }
3343
3344 acl_args.a_argc = argc;
3345 acl_args.a_argv = argv;
3346 acl_args.a_version = zacl.z_version;
3347 acl_args.a_flags = DCMD_LOOPFIRST;
3348
3349 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) {
3350 mdb_warn("can't walk ACL");
3351 return (DCMD_ERR);
3352 }
3353
3354 return (DCMD_OK);
3355 }
3356
3357 /* ARGSUSED */
3358 static int
3359 zfs_acl_node_walk_init(mdb_walk_state_t *wsp)
3360 {
3361 if (wsp->walk_addr == NULL) {
3362 mdb_warn("must supply address of zfs_acl_node_t\n");
3363 return (WALK_ERR);
3364 }
3365
3366 wsp->walk_addr +=
3367 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl");
3368
3369 if (mdb_layered_walk("list", wsp) == -1) {
3370 mdb_warn("failed to walk 'list'\n");
3371 return (WALK_ERR);
3372 }
3373
3374 return (WALK_NEXT);
3375 }
3376
3377 static int
3378 zfs_acl_node_walk_step(mdb_walk_state_t *wsp)
3379 {
3380 zfs_acl_node_t aclnode;
3381
3382 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t),
3383 wsp->walk_addr) == -1) {
3384 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr);
3385 return (WALK_ERR);
3386 }
3387
3388 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata));
3389 }
3390
3391 typedef struct ace_walk_data {
3392 int ace_count;
3393 int ace_version;
3394 } ace_walk_data_t;
3395
3396 static int
3397 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version,
3398 int ace_count, uintptr_t ace_data)
3399 {
3400 ace_walk_data_t *ace_walk_data;
3401
3402 if (wsp->walk_addr == NULL) {
3403 mdb_warn("must supply address of zfs_acl_node_t\n");
3404 return (WALK_ERR);
3405 }
3406
3407 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC);
3408
3409 ace_walk_data->ace_count = ace_count;
3410 ace_walk_data->ace_version = version;
3411
3412 wsp->walk_addr = ace_data;
3413 wsp->walk_data = ace_walk_data;
3414
3415 return (WALK_NEXT);
3416 }
3417
3418 static int
3419 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version)
3420 {
3421 static int gotid;
3422 static mdb_ctf_id_t acl_id;
3423 int z_ace_count;
3424 uintptr_t z_acldata;
3425
3426 if (!gotid) {
3427 if (mdb_ctf_lookup_by_name("struct zfs_acl_node",
3428 &acl_id) == -1) {
3429 mdb_warn("couldn't find struct zfs_acl_node");
3430 return (DCMD_ERR);
3431 }
3432 gotid = TRUE;
3433 }
3434
3435 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) {
3436 return (DCMD_ERR);
3437 }
3438 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) {
3439 return (DCMD_ERR);
3440 }
3441
3442 return (zfs_aces_walk_init_common(wsp, version,
3443 z_ace_count, z_acldata));
3444 }
3445
3446 /* ARGSUSED */
3447 static int
3448 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp)
3449 {
3450 return (zfs_acl_node_aces_walk_init_common(wsp, 1));
3451 }
3452
3453 /* ARGSUSED */
3454 static int
3455 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp)
3456 {
3457 return (zfs_acl_node_aces_walk_init_common(wsp, 0));
3458 }
3459
3460 static int
3461 zfs_aces_walk_step(mdb_walk_state_t *wsp)
3462 {
3463 ace_walk_data_t *ace_data = wsp->walk_data;
3464 zfs_ace_t zace;
3465 ace_t *acep;
3466 int status;
3467 int entry_type;
3468 int allow_type;
3469 uintptr_t ptr;
3470
3471 if (ace_data->ace_count == 0)
3472 return (WALK_DONE);
3473
3474 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) {
3475 mdb_warn("failed to read zfs_ace_t at %#lx",
3476 wsp->walk_addr);
3477 return (WALK_ERR);
3478 }
3479
3480 switch (ace_data->ace_version) {
3481 case 0:
3482 acep = (ace_t *)&zace;
3483 entry_type = acep->a_flags & ACE_TYPE_FLAGS;
3484 allow_type = acep->a_type;
3485 break;
3486 case 1:
3487 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS;
3488 allow_type = zace.z_hdr.z_type;
3489 break;
3490 default:
3491 return (WALK_ERR);
3492 }
3493
3494 ptr = (uintptr_t)wsp->walk_addr;
3495 switch (entry_type) {
3496 case ACE_OWNER:
3497 case ACE_EVERYONE:
3498 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
3499 ptr += ace_data->ace_version == 0 ?
3500 sizeof (ace_t) : sizeof (zfs_ace_hdr_t);
3501 break;
3502 case ACE_IDENTIFIER_GROUP:
3503 default:
3504 switch (allow_type) {
3505 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
3506 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
3507 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
3508 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
3509 ptr += ace_data->ace_version == 0 ?
3510 sizeof (ace_t) : sizeof (zfs_object_ace_t);
3511 break;
3512 default:
3513 ptr += ace_data->ace_version == 0 ?
3514 sizeof (ace_t) : sizeof (zfs_ace_t);
3515 break;
3516 }
3517 }
3518
3519 ace_data->ace_count--;
3520 status = wsp->walk_callback(wsp->walk_addr,
3521 (void *)(uintptr_t)&zace, wsp->walk_cbdata);
3522
3523 wsp->walk_addr = ptr;
3524 return (status);
3525 }
3526
3527 typedef struct mdb_zfs_rrwlock {
3528 uintptr_t rr_writer;
3529 boolean_t rr_writer_wanted;
3530 } mdb_zfs_rrwlock_t;
3531
3532 static uint_t rrw_key;
3533
3534 /* ARGSUSED */
3535 static int
3536 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3537 {
3538 mdb_zfs_rrwlock_t rrw;
3539
3540 if (rrw_key == 0) {
3541 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1)
3542 return (DCMD_ERR);
3543 }
3544
3545 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr,
3546 0) == -1)
3547 return (DCMD_ERR);
3548
3549 if (rrw.rr_writer != 0) {
3550 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer);
3551 return (DCMD_OK);
3552 }
3553
3554 if (rrw.rr_writer_wanted) {
3555 mdb_printf("writer wanted\n");
3556 }
3557
3558 mdb_printf("anonymous references:\n");
3559 (void) mdb_call_dcmd("refcount", addr +
3560 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"),
3561 DCMD_ADDRSPEC, 0, NULL);
3562
3563 mdb_printf("linked references:\n");
3564 (void) mdb_call_dcmd("refcount", addr +
3565 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"),
3566 DCMD_ADDRSPEC, 0, NULL);
3567
3568 /*
3569 * XXX This should find references from
3570 * "::walk thread | ::tsd -v <rrw_key>", but there is no support
3571 * for programmatic consumption of dcmds, so this would be
3572 * difficult, potentially requiring reimplementing ::tsd (both
3573 * user and kernel versions) in this MDB module.
3574 */
3575
3576 return (DCMD_OK);
3577 }
3578
3579 typedef struct mdb_arc_buf_hdr_t {
3580 uint16_t b_psize;
3581 uint16_t b_lsize;
3582 struct {
3583 uint32_t b_bufcnt;
3584 uintptr_t b_state;
3585 } b_l1hdr;
3586 } mdb_arc_buf_hdr_t;
3587
3588 enum arc_cflags {
3589 ARC_CFLAG_VERBOSE = 1 << 0,
3590 ARC_CFLAG_ANON = 1 << 1,
3591 ARC_CFLAG_MRU = 1 << 2,
3592 ARC_CFLAG_MFU = 1 << 3,
3593 ARC_CFLAG_BUFS = 1 << 4,
3594 };
3595
3596 typedef struct arc_compression_stats_data {
3597 GElf_Sym anon_sym; /* ARC_anon symbol */
3598 GElf_Sym mru_sym; /* ARC_mru symbol */
3599 GElf_Sym mrug_sym; /* ARC_mru_ghost symbol */
3600 GElf_Sym mfu_sym; /* ARC_mfu symbol */
3601 GElf_Sym mfug_sym; /* ARC_mfu_ghost symbol */
3602 GElf_Sym l2c_sym; /* ARC_l2c_only symbol */
3603 uint64_t *anon_c_hist; /* histogram of compressed sizes in anon */
3604 uint64_t *anon_u_hist; /* histogram of uncompressed sizes in anon */
3605 uint64_t *anon_bufs; /* histogram of buffer counts in anon state */
3606 uint64_t *mru_c_hist; /* histogram of compressed sizes in mru */
3607 uint64_t *mru_u_hist; /* histogram of uncompressed sizes in mru */
3608 uint64_t *mru_bufs; /* histogram of buffer counts in mru */
3609 uint64_t *mfu_c_hist; /* histogram of compressed sizes in mfu */
3610 uint64_t *mfu_u_hist; /* histogram of uncompressed sizes in mfu */
3611 uint64_t *mfu_bufs; /* histogram of buffer counts in mfu */
3612 uint64_t *all_c_hist; /* histogram of compressed anon + mru + mfu */
3613 uint64_t *all_u_hist; /* histogram of uncompressed anon + mru + mfu */
3614 uint64_t *all_bufs; /* histogram of buffer counts in all states */
3615 int arc_cflags; /* arc compression flags, specified by user */
3616 int hist_nbuckets; /* number of buckets in each histogram */
3617 } arc_compression_stats_data_t;
3618
3619 int
3620 highbit64(uint64_t i)
3621 {
3622 int h = 1;
3623
3624 if (i == 0)
3625 return (0);
3626 if (i & 0xffffffff00000000ULL) {
3627 h += 32; i >>= 32;
3628 }
3629 if (i & 0xffff0000) {
3630 h += 16; i >>= 16;
3631 }
3632 if (i & 0xff00) {
3633 h += 8; i >>= 8;
3634 }
3635 if (i & 0xf0) {
3636 h += 4; i >>= 4;
3637 }
3638 if (i & 0xc) {
3639 h += 2; i >>= 2;
3640 }
3641 if (i & 0x2) {
3642 h += 1;
3643 }
3644 return (h);
3645 }
3646
3647 /* ARGSUSED */
3648 static int
3649 arc_compression_stats_cb(uintptr_t addr, const void *unknown, void *arg)
3650 {
3651 arc_compression_stats_data_t *data = arg;
3652 mdb_arc_buf_hdr_t hdr;
3653 int cbucket, ubucket, bufcnt;
3654
3655 if (mdb_ctf_vread(&hdr, "arc_buf_hdr_t", "mdb_arc_buf_hdr_t",
3656 addr, 0) == -1) {
3657 return (WALK_ERR);
3658 }
3659
3660 /*
3661 * Headers in the ghost states, or the l2c_only state don't have
3662 * arc buffers linked off of them. Thus, their compressed size
3663 * is meaningless, so we skip these from the stats.
3664 */
3665 if (hdr.b_l1hdr.b_state == data->mrug_sym.st_value ||
3666 hdr.b_l1hdr.b_state == data->mfug_sym.st_value ||
3667 hdr.b_l1hdr.b_state == data->l2c_sym.st_value) {
3668 return (WALK_NEXT);
3669 }
3670
3671 /*
3672 * The physical size (compressed) and logical size
3673 * (uncompressed) are in units of SPA_MINBLOCKSIZE. By default,
3674 * we use the log2 of this value (rounded down to the nearest
3675 * integer) to determine the bucket to assign this header to.
3676 * Thus, the histogram is logarithmic with respect to the size
3677 * of the header. For example, the following is a mapping of the
3678 * bucket numbers and the range of header sizes they correspond to:
3679 *
3680 * 0: 0 byte headers
3681 * 1: 512 byte headers
3682 * 2: [1024 - 2048) byte headers
3683 * 3: [2048 - 4096) byte headers
3684 * 4: [4096 - 8192) byte headers
3685 * 5: [8192 - 16394) byte headers
3686 * 6: [16384 - 32768) byte headers
3687 * 7: [32768 - 65536) byte headers
3688 * 8: [65536 - 131072) byte headers
3689 * 9: 131072 byte headers
3690 *
3691 * If the ARC_CFLAG_VERBOSE flag was specified, we use the
3692 * physical and logical sizes directly. Thus, the histogram will
3693 * no longer be logarithmic; instead it will be linear with
3694 * respect to the size of the header. The following is a mapping
3695 * of the first many bucket numbers and the header size they
3696 * correspond to:
3697 *
3698 * 0: 0 byte headers
3699 * 1: 512 byte headers
3700 * 2: 1024 byte headers
3701 * 3: 1536 byte headers
3702 * 4: 2048 byte headers
3703 * 5: 2560 byte headers
3704 * 6: 3072 byte headers
3705 *
3706 * And so on. Keep in mind that a range of sizes isn't used in
3707 * the case of linear scale because the headers can only
3708 * increment or decrement in sizes of 512 bytes. So, it's not
3709 * possible for a header to be sized in between whats listed
3710 * above.
3711 *
3712 * Also, the above mapping values were calculated assuming a
3713 * SPA_MINBLOCKSHIFT of 512 bytes and a SPA_MAXBLOCKSIZE of 128K.
3714 */
3715
3716 if (data->arc_cflags & ARC_CFLAG_VERBOSE) {
3717 cbucket = hdr.b_psize;
3718 ubucket = hdr.b_lsize;
3719 } else {
3720 cbucket = highbit64(hdr.b_psize);
3721 ubucket = highbit64(hdr.b_lsize);
3722 }
3723
3724 bufcnt = hdr.b_l1hdr.b_bufcnt;
3725 if (bufcnt >= data->hist_nbuckets)
3726 bufcnt = data->hist_nbuckets - 1;
3727
3728 /* Ensure we stay within the bounds of the histogram array */
3729 ASSERT3U(cbucket, <, data->hist_nbuckets);
3730 ASSERT3U(ubucket, <, data->hist_nbuckets);
3731
3732 if (hdr.b_l1hdr.b_state == data->anon_sym.st_value) {
3733 data->anon_c_hist[cbucket]++;
3734 data->anon_u_hist[ubucket]++;
3735 data->anon_bufs[bufcnt]++;
3736 } else if (hdr.b_l1hdr.b_state == data->mru_sym.st_value) {
3737 data->mru_c_hist[cbucket]++;
3738 data->mru_u_hist[ubucket]++;
3739 data->mru_bufs[bufcnt]++;
3740 } else if (hdr.b_l1hdr.b_state == data->mfu_sym.st_value) {
3741 data->mfu_c_hist[cbucket]++;
3742 data->mfu_u_hist[ubucket]++;
3743 data->mfu_bufs[bufcnt]++;
3744 }
3745
3746 data->all_c_hist[cbucket]++;
3747 data->all_u_hist[ubucket]++;
3748 data->all_bufs[bufcnt]++;
3749
3750 return (WALK_NEXT);
3751 }
3752
3753 /* ARGSUSED */
3754 static int
3755 arc_compression_stats(uintptr_t addr, uint_t flags, int argc,
3756 const mdb_arg_t *argv)
3757 {
3758 arc_compression_stats_data_t data = { 0 };
3759 unsigned int max_shifted = SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT;
3760 unsigned int hist_size;
3761 char range[32];
3762 int rc = DCMD_OK;
3763
3764 if (mdb_getopts(argc, argv,
3765 'v', MDB_OPT_SETBITS, ARC_CFLAG_VERBOSE, &data.arc_cflags,
3766 'a', MDB_OPT_SETBITS, ARC_CFLAG_ANON, &data.arc_cflags,
3767 'b', MDB_OPT_SETBITS, ARC_CFLAG_BUFS, &data.arc_cflags,
3768 'r', MDB_OPT_SETBITS, ARC_CFLAG_MRU, &data.arc_cflags,
3769 'f', MDB_OPT_SETBITS, ARC_CFLAG_MFU, &data.arc_cflags) != argc)
3770 return (DCMD_USAGE);
3771
3772 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_anon", &data.anon_sym) ||
3773 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru", &data.mru_sym) ||
3774 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru_ghost", &data.mrug_sym) ||
3775 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu", &data.mfu_sym) ||
3776 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu_ghost", &data.mfug_sym) ||
3777 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_l2c_only", &data.l2c_sym)) {
3778 mdb_warn("can't find arc state symbol");
3779 return (DCMD_ERR);
3780 }
3781
3782 /*
3783 * Determine the maximum expected size for any header, and use
3784 * this to determine the number of buckets needed for each
3785 * histogram. If ARC_CFLAG_VERBOSE is specified, this value is
3786 * used directly; otherwise the log2 of the maximum size is
3787 * used. Thus, if using a log2 scale there's a maximum of 10
3788 * possible buckets, while the linear scale (when using
3789 * ARC_CFLAG_VERBOSE) has a maximum of 257 buckets.
3790 */
3791 if (data.arc_cflags & ARC_CFLAG_VERBOSE)
3792 data.hist_nbuckets = max_shifted + 1;
3793 else
3794 data.hist_nbuckets = highbit64(max_shifted) + 1;
3795
3796 hist_size = sizeof (uint64_t) * data.hist_nbuckets;
3797
3798 data.anon_c_hist = mdb_zalloc(hist_size, UM_SLEEP);
3799 data.anon_u_hist = mdb_zalloc(hist_size, UM_SLEEP);
3800 data.anon_bufs = mdb_zalloc(hist_size, UM_SLEEP);
3801
3802 data.mru_c_hist = mdb_zalloc(hist_size, UM_SLEEP);
3803 data.mru_u_hist = mdb_zalloc(hist_size, UM_SLEEP);
3804 data.mru_bufs = mdb_zalloc(hist_size, UM_SLEEP);
3805
3806 data.mfu_c_hist = mdb_zalloc(hist_size, UM_SLEEP);
3807 data.mfu_u_hist = mdb_zalloc(hist_size, UM_SLEEP);
3808 data.mfu_bufs = mdb_zalloc(hist_size, UM_SLEEP);
3809
3810 data.all_c_hist = mdb_zalloc(hist_size, UM_SLEEP);
3811 data.all_u_hist = mdb_zalloc(hist_size, UM_SLEEP);
3812 data.all_bufs = mdb_zalloc(hist_size, UM_SLEEP);
3813
3814 if (mdb_walk("arc_buf_hdr_t_full", arc_compression_stats_cb,
3815 &data) != 0) {
3816 mdb_warn("can't walk arc_buf_hdr's");
3817 rc = DCMD_ERR;
3818 goto out;
3819 }
3820
3821 if (data.arc_cflags & ARC_CFLAG_VERBOSE) {
3822 rc = mdb_snprintf(range, sizeof (range),
3823 "[n*%llu, (n+1)*%llu)", SPA_MINBLOCKSIZE,
3824 SPA_MINBLOCKSIZE);
3825 } else {
3826 rc = mdb_snprintf(range, sizeof (range),
3827 "[2^(n-1)*%llu, 2^n*%llu)", SPA_MINBLOCKSIZE,
3828 SPA_MINBLOCKSIZE);
3829 }
3830
3831 if (rc < 0) {
3832 /* snprintf failed, abort the dcmd */
3833 rc = DCMD_ERR;
3834 goto out;
3835 } else {
3836 /* snprintf succeeded above, reset return code */
3837 rc = DCMD_OK;
3838 }
3839
3840 if (data.arc_cflags & ARC_CFLAG_ANON) {
3841 if (data.arc_cflags & ARC_CFLAG_BUFS) {
3842 mdb_printf("Histogram of the number of anon buffers "
3843 "that are associated with an arc hdr.\n");
3844 dump_histogram(data.anon_bufs, data.hist_nbuckets, 0);
3845 mdb_printf("\n");
3846 }
3847 mdb_printf("Histogram of compressed anon buffers.\n"
3848 "Each bucket represents buffers of size: %s.\n", range);
3849 dump_histogram(data.anon_c_hist, data.hist_nbuckets, 0);
3850 mdb_printf("\n");
3851
3852 mdb_printf("Histogram of uncompressed anon buffers.\n"
3853 "Each bucket represents buffers of size: %s.\n", range);
3854 dump_histogram(data.anon_u_hist, data.hist_nbuckets, 0);
3855 mdb_printf("\n");
3856 }
3857
3858 if (data.arc_cflags & ARC_CFLAG_MRU) {
3859 if (data.arc_cflags & ARC_CFLAG_BUFS) {
3860 mdb_printf("Histogram of the number of mru buffers "
3861 "that are associated with an arc hdr.\n");
3862 dump_histogram(data.mru_bufs, data.hist_nbuckets, 0);
3863 mdb_printf("\n");
3864 }
3865 mdb_printf("Histogram of compressed mru buffers.\n"
3866 "Each bucket represents buffers of size: %s.\n", range);
3867 dump_histogram(data.mru_c_hist, data.hist_nbuckets, 0);
3868 mdb_printf("\n");
3869
3870 mdb_printf("Histogram of uncompressed mru buffers.\n"
3871 "Each bucket represents buffers of size: %s.\n", range);
3872 dump_histogram(data.mru_u_hist, data.hist_nbuckets, 0);
3873 mdb_printf("\n");
3874 }
3875
3876 if (data.arc_cflags & ARC_CFLAG_MFU) {
3877 if (data.arc_cflags & ARC_CFLAG_BUFS) {
3878 mdb_printf("Histogram of the number of mfu buffers "
3879 "that are associated with an arc hdr.\n");
3880 dump_histogram(data.mfu_bufs, data.hist_nbuckets, 0);
3881 mdb_printf("\n");
3882 }
3883
3884 mdb_printf("Histogram of compressed mfu buffers.\n"
3885 "Each bucket represents buffers of size: %s.\n", range);
3886 dump_histogram(data.mfu_c_hist, data.hist_nbuckets, 0);
3887 mdb_printf("\n");
3888
3889 mdb_printf("Histogram of uncompressed mfu buffers.\n"
3890 "Each bucket represents buffers of size: %s.\n", range);
3891 dump_histogram(data.mfu_u_hist, data.hist_nbuckets, 0);
3892 mdb_printf("\n");
3893 }
3894
3895 if (data.arc_cflags & ARC_CFLAG_BUFS) {
3896 mdb_printf("Histogram of all buffers that "
3897 "are associated with an arc hdr.\n");
3898 dump_histogram(data.all_bufs, data.hist_nbuckets, 0);
3899 mdb_printf("\n");
3900 }
3901
3902 mdb_printf("Histogram of all compressed buffers.\n"
3903 "Each bucket represents buffers of size: %s.\n", range);
3904 dump_histogram(data.all_c_hist, data.hist_nbuckets, 0);
3905 mdb_printf("\n");
3906
3907 mdb_printf("Histogram of all uncompressed buffers.\n"
3908 "Each bucket represents buffers of size: %s.\n", range);
3909 dump_histogram(data.all_u_hist, data.hist_nbuckets, 0);
3910
3911 out:
3912 mdb_free(data.anon_c_hist, hist_size);
3913 mdb_free(data.anon_u_hist, hist_size);
3914 mdb_free(data.anon_bufs, hist_size);
3915
3916 mdb_free(data.mru_c_hist, hist_size);
3917 mdb_free(data.mru_u_hist, hist_size);
3918 mdb_free(data.mru_bufs, hist_size);
3919
3920 mdb_free(data.mfu_c_hist, hist_size);
3921 mdb_free(data.mfu_u_hist, hist_size);
3922 mdb_free(data.mfu_bufs, hist_size);
3923
3924 mdb_free(data.all_c_hist, hist_size);
3925 mdb_free(data.all_u_hist, hist_size);
3926 mdb_free(data.all_bufs, hist_size);
3927
3928 return (rc);
3929 }
3930
3931 /*
3932 * MDB module linkage information:
3933 *
3934 * We declare a list of structures describing our dcmds, and a function
3935 * named _mdb_init to return a pointer to our module information.
3936 */
3937
3938 static const mdb_dcmd_t dcmds[] = {
3939 { "arc", "[-bkmg]", "print ARC variables", arc_print },
3940 { "blkptr", ":", "print blkptr_t", blkptr },
3941 { "dva", ":", "print dva_t", dva },
3942 { "dbuf", ":", "print dmu_buf_impl_t", dbuf },
3943 { "dbuf_stats", ":", "dbuf stats", dbuf_stats },
3944 { "dbufs",
3945 "\t[-O objset_t*] [-n objset_name | \"mos\"] "
3946 "[-o object | \"mdn\"] \n"
3947 "\t[-l level] [-b blkid | \"bonus\"]",
3948 "find dmu_buf_impl_t's that match specified criteria", dbufs },
3949 { "abuf_find", "dva_word[0] dva_word[1]",
3950 "find arc_buf_hdr_t of a specified DVA",
3951 abuf_find },
3952 { "spa", "?[-cevmMh]\n"
3953 "\t-c display spa config\n"
3954 "\t-e display vdev statistics\n"
3955 "\t-v display vdev information\n"
3956 "\t-m display metaslab statistics\n"
3957 "\t-M display metaslab group statistics\n"
3958 "\t-h display histogram (requires -m or -M)\n",
3959 "spa_t summary", spa_print },
3960 { "spa_config", ":", "print spa_t configuration", spa_print_config },
3961 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space },
3962 { "spa_vdevs", ":[-emMh]\n"
3963 "\t-e display vdev statistics\n"
3964 "\t-m dispaly metaslab statistics\n"
3965 "\t-M display metaslab group statistic\n"
3966 "\t-h display histogram (requires -m or -M)\n",
3967 "given a spa_t, print vdev summary", spa_vdevs },
3968 { "vdev", ":[-remMh]\n"
3969 "\t-r display recursively\n"
3970 "\t-e display statistics\n"
3971 "\t-m display metaslab statistics (top level vdev only)\n"
3972 "\t-M display metaslab group statistics (top level vdev only)\n"
3973 "\t-h display histogram (requires -m or -M)\n",
3974 "vdev_t summary", vdev_print },
3975 { "zio", ":[-cpr]\n"
3976 "\t-c display children\n"
3977 "\t-p display parents\n"
3978 "\t-r display recursively",
3979 "zio_t summary", zio_print },
3980 { "zio_state", "?", "print out all zio_t structures on system or "
3981 "for a particular pool", zio_state },
3982 { "zfs_blkstats", ":[-v]",
3983 "given a spa_t, print block type stats from last scrub",
3984 zfs_blkstats },
3985 { "zfs_params", "", "print zfs tunable parameters", zfs_params },
3986 { "refcount", ":[-r]\n"
3987 "\t-r display recently removed references",
3988 "print refcount_t holders", refcount },
3989 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf },
3990 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t",
3991 zfs_acl_dump },
3992 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print },
3993 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print },
3994 { "sa_attr_table", ":", "print SA attribute table from sa_os_t",
3995 sa_attr_table},
3996 { "sa_attr", ": attr_id",
3997 "print SA attribute address when given sa_handle_t", sa_attr_print},
3998 { "zfs_dbgmsg", ":[-va]",
3999 "print zfs debug log", dbgmsg},
4000 { "rrwlock", ":",
4001 "print rrwlock_t, including readers", rrwlock},
4002 { "metaslab_weight", "weight",
4003 "print metaslab weight", metaslab_weight},
4004 { "metaslab_trace", ":",
4005 "print metaslab allocation trace records", metaslab_trace},
4006 { "arc_compression_stats", ":[-vabrf]\n"
4007 "\t-v verbose, display a linearly scaled histogram\n"
4008 "\t-a display ARC_anon state statistics individually\n"
4009 "\t-r display ARC_mru state statistics individually\n"
4010 "\t-f display ARC_mfu state statistics individually\n"
4011 "\t-b display histogram of buffer counts\n",
4012 "print a histogram of compressed arc buffer sizes",
4013 arc_compression_stats},
4014 { NULL }
4015 };
4016
4017 static const mdb_walker_t walkers[] = {
4018 { "zms_freelist", "walk ZFS metaslab freelist",
4019 freelist_walk_init, freelist_walk_step, NULL },
4020 { "txg_list", "given any txg_list_t *, walk all entries in all txgs",
4021 txg_list_walk_init, txg_list_walk_step, NULL },
4022 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0",
4023 txg_list0_walk_init, txg_list_walk_step, NULL },
4024 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1",
4025 txg_list1_walk_init, txg_list_walk_step, NULL },
4026 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2",
4027 txg_list2_walk_init, txg_list_walk_step, NULL },
4028 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3",
4029 txg_list3_walk_init, txg_list_walk_step, NULL },
4030 { "zio", "walk all zio structures, optionally for a particular spa_t",
4031 zio_walk_init, zio_walk_step, NULL },
4032 { "zio_root",
4033 "walk all root zio_t structures, optionally for a particular spa_t",
4034 zio_walk_init, zio_walk_root_step, NULL },
4035 { "spa", "walk all spa_t entries in the namespace",
4036 spa_walk_init, spa_walk_step, NULL },
4037 { "metaslab", "given a spa_t *, walk all metaslab_t structures",
4038 metaslab_walk_init, metaslab_walk_step, NULL },
4039 { "multilist", "given a multilist_t *, walk all list_t structures",
4040 multilist_walk_init, multilist_walk_step, NULL },
4041 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes",
4042 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL },
4043 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs",
4044 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL },
4045 { "zfs_acl_node_aces0",
4046 "given a zfs_acl_node_t, walk all ACEs as ace_t",
4047 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL },
4048 { NULL }
4049 };
4050
4051 static const mdb_modinfo_t modinfo = {
4052 MDB_API_VERSION, dcmds, walkers
4053 };
4054
4055 const mdb_modinfo_t *
4056 _mdb_init(void)
4057 {
4058 return (&modinfo);
4059 }