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4976 zfs should only avoid writing to a failing non-redundant top-level vdev
[unleashed.git] / usr / src / cmd / mdb / common / modules / zfs / zfs.c
blob763e560bac21e50a3d30e013a3f10ffe1c8e41ec
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
25 */
26
27 /* Portions Copyright 2010 Robert Milkowski */
28
29 #include <mdb/mdb_ctf.h>
30 #include <sys/zfs_context.h>
31 #include <sys/mdb_modapi.h>
32 #include <sys/dbuf.h>
33 #include <sys/dmu_objset.h>
34 #include <sys/dsl_dir.h>
35 #include <sys/dsl_pool.h>
36 #include <sys/metaslab_impl.h>
37 #include <sys/space_map.h>
38 #include <sys/list.h>
39 #include <sys/vdev_impl.h>
40 #include <sys/zap_leaf.h>
41 #include <sys/zap_impl.h>
42 #include <ctype.h>
43 #include <sys/zfs_acl.h>
44 #include <sys/sa_impl.h>
45
46 #ifdef _KERNEL
47 #define ZFS_OBJ_NAME "zfs"
48 extern int64_t mdb_gethrtime(void);
49 #else
50 #define ZFS_OBJ_NAME "libzpool.so.1"
51 #endif
52
53 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`"
54
55 #ifndef _KERNEL
56 int aok;
57 #endif
58
59 enum spa_flags {
60 SPA_FLAG_CONFIG = 1 << 0,
61 SPA_FLAG_VDEVS = 1 << 1,
62 SPA_FLAG_ERRORS = 1 << 2,
63 SPA_FLAG_METASLAB_GROUPS = 1 << 3,
64 SPA_FLAG_METASLABS = 1 << 4,
65 SPA_FLAG_HISTOGRAMS = 1 << 5
66 };
67
68 #define SPA_FLAG_ALL_VDEV \
69 (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \
70 SPA_FLAG_METASLABS | SPA_FLAG_HISTOGRAMS)
71
72 static int
73 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp,
74 const char *member, int len, void *buf)
75 {
76 mdb_ctf_id_t id;
77 ulong_t off;
78 char name[64];
79
80 if (idp == NULL) {
81 if (mdb_ctf_lookup_by_name(type, &id) == -1) {
82 mdb_warn("couldn't find type %s", type);
83 return (DCMD_ERR);
84 }
85 idp = &id;
86 } else {
87 type = name;
88 mdb_ctf_type_name(*idp, name, sizeof (name));
89 }
90
91 if (mdb_ctf_offsetof(*idp, member, &off) == -1) {
92 mdb_warn("couldn't find member %s of type %s\n", member, type);
93 return (DCMD_ERR);
94 }
95 if (off % 8 != 0) {
96 mdb_warn("member %s of type %s is unsupported bitfield",
97 member, type);
98 return (DCMD_ERR);
99 }
100 off /= 8;
101
102 if (mdb_vread(buf, len, addr + off) == -1) {
103 mdb_warn("failed to read %s from %s at %p",
104 member, type, addr + off);
105 return (DCMD_ERR);
106 }
107 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */
108
109 return (0);
110 }
111
112 #define GETMEMB(addr, structname, member, dest) \
113 getmember(addr, ZFS_STRUCT structname, NULL, #member, \
114 sizeof (dest), &(dest))
115
116 #define GETMEMBID(addr, ctfid, member, dest) \
117 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest))
118
119 static boolean_t
120 strisprint(const char *cp)
121 {
122 for (; *cp; cp++) {
123 if (!isprint(*cp))
124 return (B_FALSE);
125 }
126 return (B_TRUE);
127 }
128
129 #define NICENUM_BUFLEN 6
130
131 static int
132 snprintfrac(char *buf, int len,
133 uint64_t numerator, uint64_t denom, int frac_digits)
134 {
135 int mul = 1;
136 int whole, frac, i;
137
138 for (i = frac_digits; i; i--)
139 mul *= 10;
140 whole = numerator / denom;
141 frac = mul * numerator / denom - mul * whole;
142 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac));
143 }
144
145 static void
146 mdb_nicenum(uint64_t num, char *buf)
147 {
148 uint64_t n = num;
149 int index = 0;
150 char *u;
151
152 while (n >= 1024) {
153 n = (n + (1024 / 2)) / 1024; /* Round up or down */
154 index++;
155 }
156
157 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2];
158
159 if (index == 0) {
160 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu",
161 (u_longlong_t)n);
162 } else if (n < 10 && (num & (num - 1)) != 0) {
163 (void) snprintfrac(buf, NICENUM_BUFLEN,
164 num, 1ULL << 10 * index, 2);
165 strcat(buf, u);
166 } else if (n < 100 && (num & (num - 1)) != 0) {
167 (void) snprintfrac(buf, NICENUM_BUFLEN,
168 num, 1ULL << 10 * index, 1);
169 strcat(buf, u);
170 } else {
171 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s",
172 (u_longlong_t)n, u);
173 }
174 }
175
176 static int verbose;
177
178 static int
179 freelist_walk_init(mdb_walk_state_t *wsp)
180 {
181 if (wsp->walk_addr == NULL) {
182 mdb_warn("must supply starting address\n");
183 return (WALK_ERR);
184 }
185
186 wsp->walk_data = 0; /* Index into the freelist */
187 return (WALK_NEXT);
188 }
189
190 static int
191 freelist_walk_step(mdb_walk_state_t *wsp)
192 {
193 uint64_t entry;
194 uintptr_t number = (uintptr_t)wsp->walk_data;
195 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
196 "INVALID", "INVALID", "INVALID", "INVALID" };
197 int mapshift = SPA_MINBLOCKSHIFT;
198
199 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) {
200 mdb_warn("failed to read freelist entry %p", wsp->walk_addr);
201 return (WALK_DONE);
202 }
203 wsp->walk_addr += sizeof (entry);
204 wsp->walk_data = (void *)(number + 1);
205
206 if (SM_DEBUG_DECODE(entry)) {
207 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n",
208 number,
209 ddata[SM_DEBUG_ACTION_DECODE(entry)],
210 SM_DEBUG_TXG_DECODE(entry),
211 SM_DEBUG_SYNCPASS_DECODE(entry));
212 } else {
213 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c "
214 "size=%06llx", number,
215 SM_OFFSET_DECODE(entry) << mapshift,
216 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) <<
217 mapshift,
218 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
219 SM_RUN_DECODE(entry) << mapshift);
220 if (verbose)
221 mdb_printf(" (raw=%012llx)\n", entry);
222 mdb_printf("\n");
223 }
224 return (WALK_NEXT);
225 }
226
227 static int
228 mdb_dsl_dir_name(uintptr_t addr, char *buf)
229 {
230 static int gotid;
231 static mdb_ctf_id_t dd_id;
232 uintptr_t dd_parent;
233 char dd_myname[MAXNAMELEN];
234
235 if (!gotid) {
236 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir",
237 &dd_id) == -1) {
238 mdb_warn("couldn't find struct dsl_dir");
239 return (DCMD_ERR);
240 }
241 gotid = TRUE;
242 }
243 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) ||
244 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) {
245 return (DCMD_ERR);
246 }
247
248 if (dd_parent) {
249 if (mdb_dsl_dir_name(dd_parent, buf))
250 return (DCMD_ERR);
251 strcat(buf, "/");
252 }
253
254 if (dd_myname[0])
255 strcat(buf, dd_myname);
256 else
257 strcat(buf, "???");
258
259 return (0);
260 }
261
262 static int
263 objset_name(uintptr_t addr, char *buf)
264 {
265 static int gotid;
266 static mdb_ctf_id_t os_id, ds_id;
267 uintptr_t os_dsl_dataset;
268 char ds_snapname[MAXNAMELEN];
269 uintptr_t ds_dir;
270
271 buf[0] = '\0';
272
273 if (!gotid) {
274 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset",
275 &os_id) == -1) {
276 mdb_warn("couldn't find struct objset");
277 return (DCMD_ERR);
278 }
279 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset",
280 &ds_id) == -1) {
281 mdb_warn("couldn't find struct dsl_dataset");
282 return (DCMD_ERR);
283 }
284
285 gotid = TRUE;
286 }
287
288 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset))
289 return (DCMD_ERR);
290
291 if (os_dsl_dataset == 0) {
292 strcat(buf, "mos");
293 return (0);
294 }
295
296 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) ||
297 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) {
298 return (DCMD_ERR);
299 }
300
301 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf))
302 return (DCMD_ERR);
303
304 if (ds_snapname[0]) {
305 strcat(buf, "@");
306 strcat(buf, ds_snapname);
307 }
308 return (0);
309 }
310
311 static void
312 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val,
313 const char *prefix)
314 {
315 const char *cp;
316 size_t len = strlen(prefix);
317
318 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) {
319 if (strncmp(cp, prefix, len) == 0)
320 cp += len;
321 (void) strncpy(out, cp, size);
322 } else {
323 mdb_snprintf(out, size, "? (%d)", val);
324 }
325 }
326
327 /* ARGSUSED */
328 static int
329 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
330 {
331 /*
332 * This table can be approximately generated by running:
333 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2
334 */
335 static const char *params[] = {
336 "arc_reduce_dnlc_percent",
337 "arc_lotsfree_percent",
338 "zfs_dirty_data_max",
339 "zfs_dirty_data_sync",
340 "zfs_delay_max_ns",
341 "zfs_delay_min_dirty_percent",
342 "zfs_delay_scale",
343 "zfs_vdev_max_active",
344 "zfs_vdev_sync_read_min_active",
345 "zfs_vdev_sync_read_max_active",
346 "zfs_vdev_sync_write_min_active",
347 "zfs_vdev_sync_write_max_active",
348 "zfs_vdev_async_read_min_active",
349 "zfs_vdev_async_read_max_active",
350 "zfs_vdev_async_write_min_active",
351 "zfs_vdev_async_write_max_active",
352 "zfs_vdev_scrub_min_active",
353 "zfs_vdev_scrub_max_active",
354 "zfs_vdev_async_write_active_min_dirty_percent",
355 "zfs_vdev_async_write_active_max_dirty_percent",
356 "spa_asize_inflation",
357 "zfs_arc_max",
358 "zfs_arc_min",
359 "arc_shrink_shift",
360 "zfs_mdcomp_disable",
361 "zfs_prefetch_disable",
362 "zfetch_max_streams",
363 "zfetch_min_sec_reap",
364 "zfetch_block_cap",
365 "zfetch_array_rd_sz",
366 "zfs_default_bs",
367 "zfs_default_ibs",
368 "metaslab_aliquot",
369 "reference_tracking_enable",
370 "reference_history",
371 "spa_max_replication_override",
372 "spa_mode_global",
373 "zfs_flags",
374 "zfs_txg_timeout",
375 "zfs_vdev_cache_max",
376 "zfs_vdev_cache_size",
377 "zfs_vdev_cache_bshift",
378 "vdev_mirror_shift",
379 "zfs_scrub_limit",
380 "zfs_no_scrub_io",
381 "zfs_no_scrub_prefetch",
382 "zfs_vdev_aggregation_limit",
383 "fzap_default_block_shift",
384 "zfs_immediate_write_sz",
385 "zfs_read_chunk_size",
386 "zfs_nocacheflush",
387 "zil_replay_disable",
388 "metaslab_gang_bang",
389 "metaslab_df_alloc_threshold",
390 "metaslab_df_free_pct",
391 "zio_injection_enabled",
392 "zvol_immediate_write_sz",
393 };
394
395 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) {
396 int sz;
397 uint64_t val64;
398 uint32_t *val32p = (uint32_t *)&val64;
399
400 sz = mdb_readvar(&val64, params[i]);
401 if (sz == 4) {
402 mdb_printf("%s = 0x%x\n", params[i], *val32p);
403 } else if (sz == 8) {
404 mdb_printf("%s = 0x%llx\n", params[i], val64);
405 } else {
406 mdb_warn("variable %s not found", params[i]);
407 }
408 }
409
410 return (DCMD_OK);
411 }
412
413 /* ARGSUSED */
414 static int
415 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
416 {
417 mdb_ctf_id_t type_enum, checksum_enum, compress_enum;
418 char type[80], checksum[80], compress[80];
419 blkptr_t blk, *bp = &blk;
420 char buf[BP_SPRINTF_LEN];
421
422 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) {
423 mdb_warn("failed to read blkptr_t");
424 return (DCMD_ERR);
425 }
426
427 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 ||
428 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 ||
429 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) {
430 mdb_warn("Could not find blkptr enumerated types");
431 return (DCMD_ERR);
432 }
433
434 enum_lookup(type, sizeof (type), type_enum,
435 BP_GET_TYPE(bp), "DMU_OT_");
436 enum_lookup(checksum, sizeof (checksum), checksum_enum,
437 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_");
438 enum_lookup(compress, sizeof (compress), compress_enum,
439 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_");
440
441 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type,
442 checksum, compress);
443
444 mdb_printf("%s\n", buf);
445
446 return (DCMD_OK);
447 }
448
449 typedef struct mdb_dmu_buf_impl {
450 struct {
451 uint64_t db_object;
452 } db;
453 uintptr_t db_objset;
454 uint64_t db_level;
455 uint64_t db_blkid;
456 struct {
457 uint64_t rc_count;
458 } db_holds;
459 } mdb_dmu_buf_impl_t;
460
461 /* ARGSUSED */
462 static int
463 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
464 {
465 mdb_dmu_buf_impl_t db;
466 char objectname[32];
467 char blkidname[32];
468 char path[MAXNAMELEN];
469
470 if (DCMD_HDRSPEC(flags))
471 mdb_printf(" addr object lvl blkid holds os\n");
472
473 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
474 addr, 0) == -1)
475 return (DCMD_ERR);
476
477 if (db.db.db_object == DMU_META_DNODE_OBJECT)
478 (void) strcpy(objectname, "mdn");
479 else
480 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx",
481 (u_longlong_t)db.db.db_object);
482
483 if (db.db_blkid == DMU_BONUS_BLKID)
484 (void) strcpy(blkidname, "bonus");
485 else
486 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx",
487 (u_longlong_t)db.db_blkid);
488
489 if (objset_name(db.db_objset, path)) {
490 return (DCMD_ERR);
491 }
492
493 mdb_printf("%p %8s %1u %9s %2llu %s\n", addr,
494 objectname, (int)db.db_level, blkidname,
495 db.db_holds.rc_count, path);
496
497 return (DCMD_OK);
498 }
499
500 /* ARGSUSED */
501 static int
502 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
503 {
504 #define HISTOSZ 32
505 uintptr_t dbp;
506 dmu_buf_impl_t db;
507 dbuf_hash_table_t ht;
508 uint64_t bucket, ndbufs;
509 uint64_t histo[HISTOSZ];
510 uint64_t histo2[HISTOSZ];
511 int i, maxidx;
512
513 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) {
514 mdb_warn("failed to read 'dbuf_hash_table'");
515 return (DCMD_ERR);
516 }
517
518 for (i = 0; i < HISTOSZ; i++) {
519 histo[i] = 0;
520 histo2[i] = 0;
521 }
522
523 ndbufs = 0;
524 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) {
525 int len;
526
527 if (mdb_vread(&dbp, sizeof (void *),
528 (uintptr_t)(ht.hash_table+bucket)) == -1) {
529 mdb_warn("failed to read hash bucket %u at %p",
530 bucket, ht.hash_table+bucket);
531 return (DCMD_ERR);
532 }
533
534 len = 0;
535 while (dbp != 0) {
536 if (mdb_vread(&db, sizeof (dmu_buf_impl_t),
537 dbp) == -1) {
538 mdb_warn("failed to read dbuf at %p", dbp);
539 return (DCMD_ERR);
540 }
541 dbp = (uintptr_t)db.db_hash_next;
542 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--)
543 histo2[i]++;
544 len++;
545 ndbufs++;
546 }
547
548 if (len >= HISTOSZ)
549 len = HISTOSZ-1;
550 histo[len]++;
551 }
552
553 mdb_printf("hash table has %llu buckets, %llu dbufs "
554 "(avg %llu buckets/dbuf)\n",
555 ht.hash_table_mask+1, ndbufs,
556 (ht.hash_table_mask+1)/ndbufs);
557
558 mdb_printf("\n");
559 maxidx = 0;
560 for (i = 0; i < HISTOSZ; i++)
561 if (histo[i] > 0)
562 maxidx = i;
563 mdb_printf("hash chain length number of buckets\n");
564 for (i = 0; i <= maxidx; i++)
565 mdb_printf("%u %llu\n", i, histo[i]);
566
567 mdb_printf("\n");
568 maxidx = 0;
569 for (i = 0; i < HISTOSZ; i++)
570 if (histo2[i] > 0)
571 maxidx = i;
572 mdb_printf("hash chain depth number of dbufs\n");
573 for (i = 0; i <= maxidx; i++)
574 mdb_printf("%u or more %llu %llu%%\n",
575 i, histo2[i], histo2[i]*100/ndbufs);
576
577
578 return (DCMD_OK);
579 }
580
581 #define CHAIN_END 0xffff
582 /*
583 * ::zap_leaf [-v]
584 *
585 * Print a zap_leaf_phys_t, assumed to be 16k
586 */
587 /* ARGSUSED */
588 static int
589 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
590 {
591 char buf[16*1024];
592 int verbose = B_FALSE;
593 int four = B_FALSE;
594 zap_leaf_t l;
595 zap_leaf_phys_t *zlp = (void *)buf;
596 int i;
597
598 if (mdb_getopts(argc, argv,
599 'v', MDB_OPT_SETBITS, TRUE, &verbose,
600 '4', MDB_OPT_SETBITS, TRUE, &four,
601 NULL) != argc)
602 return (DCMD_USAGE);
603
604 l.l_phys = zlp;
605 l.l_bs = 14; /* assume 16k blocks */
606 if (four)
607 l.l_bs = 12;
608
609 if (!(flags & DCMD_ADDRSPEC)) {
610 return (DCMD_USAGE);
611 }
612
613 if (mdb_vread(buf, sizeof (buf), addr) == -1) {
614 mdb_warn("failed to read zap_leaf_phys_t at %p", addr);
615 return (DCMD_ERR);
616 }
617
618 if (zlp->l_hdr.lh_block_type != ZBT_LEAF ||
619 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) {
620 mdb_warn("This does not appear to be a zap_leaf_phys_t");
621 return (DCMD_ERR);
622 }
623
624 mdb_printf("zap_leaf_phys_t at %p:\n", addr);
625 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len);
626 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix);
627 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries);
628 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree,
629 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l)));
630 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist);
631 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags,
632 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ?
633 "ENTRIES_CDSORTED" : "");
634
635 if (verbose) {
636 mdb_printf(" hash table:\n");
637 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) {
638 if (zlp->l_hash[i] != CHAIN_END)
639 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]);
640 }
641 }
642
643 mdb_printf(" chunks:\n");
644 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) {
645 /* LINTED: alignment */
646 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i);
647 switch (zlc->l_entry.le_type) {
648 case ZAP_CHUNK_FREE:
649 if (verbose) {
650 mdb_printf(" %u: free; lf_next = %u\n",
651 i, zlc->l_free.lf_next);
652 }
653 break;
654 case ZAP_CHUNK_ENTRY:
655 mdb_printf(" %u: entry\n", i);
656 if (verbose) {
657 mdb_printf(" le_next = %u\n",
658 zlc->l_entry.le_next);
659 }
660 mdb_printf(" le_name_chunk = %u\n",
661 zlc->l_entry.le_name_chunk);
662 mdb_printf(" le_name_numints = %u\n",
663 zlc->l_entry.le_name_numints);
664 mdb_printf(" le_value_chunk = %u\n",
665 zlc->l_entry.le_value_chunk);
666 mdb_printf(" le_value_intlen = %u\n",
667 zlc->l_entry.le_value_intlen);
668 mdb_printf(" le_value_numints = %u\n",
669 zlc->l_entry.le_value_numints);
670 mdb_printf(" le_cd = %u\n",
671 zlc->l_entry.le_cd);
672 mdb_printf(" le_hash = %llx\n",
673 zlc->l_entry.le_hash);
674 break;
675 case ZAP_CHUNK_ARRAY:
676 mdb_printf(" %u: array", i);
677 if (strisprint((char *)zlc->l_array.la_array))
678 mdb_printf(" \"%s\"", zlc->l_array.la_array);
679 mdb_printf("\n");
680 if (verbose) {
681 int j;
682 mdb_printf(" ");
683 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) {
684 mdb_printf("%02x ",
685 zlc->l_array.la_array[j]);
686 }
687 mdb_printf("\n");
688 }
689 if (zlc->l_array.la_next != CHAIN_END) {
690 mdb_printf(" lf_next = %u\n",
691 zlc->l_array.la_next);
692 }
693 break;
694 default:
695 mdb_printf(" %u: undefined type %u\n",
696 zlc->l_entry.le_type);
697 }
698 }
699
700 return (DCMD_OK);
701 }
702
703 typedef struct dbufs_data {
704 mdb_ctf_id_t id;
705 uint64_t objset;
706 uint64_t object;
707 uint64_t level;
708 uint64_t blkid;
709 char *osname;
710 } dbufs_data_t;
711
712 #define DBUFS_UNSET (0xbaddcafedeadbeefULL)
713
714 /* ARGSUSED */
715 static int
716 dbufs_cb(uintptr_t addr, const void *unknown, void *arg)
717 {
718 dbufs_data_t *data = arg;
719 uintptr_t objset;
720 dmu_buf_t db;
721 uint8_t level;
722 uint64_t blkid;
723 char osname[MAXNAMELEN];
724
725 if (GETMEMBID(addr, &data->id, db_objset, objset) ||
726 GETMEMBID(addr, &data->id, db, db) ||
727 GETMEMBID(addr, &data->id, db_level, level) ||
728 GETMEMBID(addr, &data->id, db_blkid, blkid)) {
729 return (WALK_ERR);
730 }
731
732 if ((data->objset == DBUFS_UNSET || data->objset == objset) &&
733 (data->osname == NULL || (objset_name(objset, osname) == 0 &&
734 strcmp(data->osname, osname) == 0)) &&
735 (data->object == DBUFS_UNSET || data->object == db.db_object) &&
736 (data->level == DBUFS_UNSET || data->level == level) &&
737 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) {
738 mdb_printf("%#lr\n", addr);
739 }
740 return (WALK_NEXT);
741 }
742
743 /* ARGSUSED */
744 static int
745 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
746 {
747 dbufs_data_t data;
748 char *object = NULL;
749 char *blkid = NULL;
750
751 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET;
752 data.osname = NULL;
753
754 if (mdb_getopts(argc, argv,
755 'O', MDB_OPT_UINT64, &data.objset,
756 'n', MDB_OPT_STR, &data.osname,
757 'o', MDB_OPT_STR, &object,
758 'l', MDB_OPT_UINT64, &data.level,
759 'b', MDB_OPT_STR, &blkid) != argc) {
760 return (DCMD_USAGE);
761 }
762
763 if (object) {
764 if (strcmp(object, "mdn") == 0) {
765 data.object = DMU_META_DNODE_OBJECT;
766 } else {
767 data.object = mdb_strtoull(object);
768 }
769 }
770
771 if (blkid) {
772 if (strcmp(blkid, "bonus") == 0) {
773 data.blkid = DMU_BONUS_BLKID;
774 } else {
775 data.blkid = mdb_strtoull(blkid);
776 }
777 }
778
779 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) {
780 mdb_warn("couldn't find struct dmu_buf_impl_t");
781 return (DCMD_ERR);
782 }
783
784 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) {
785 mdb_warn("can't walk dbufs");
786 return (DCMD_ERR);
787 }
788
789 return (DCMD_OK);
790 }
791
792 typedef struct abuf_find_data {
793 dva_t dva;
794 mdb_ctf_id_t id;
795 } abuf_find_data_t;
796
797 /* ARGSUSED */
798 static int
799 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg)
800 {
801 abuf_find_data_t *data = arg;
802 dva_t dva;
803
804 if (GETMEMBID(addr, &data->id, b_dva, dva)) {
805 return (WALK_ERR);
806 }
807
808 if (dva.dva_word[0] == data->dva.dva_word[0] &&
809 dva.dva_word[1] == data->dva.dva_word[1]) {
810 mdb_printf("%#lr\n", addr);
811 }
812 return (WALK_NEXT);
813 }
814
815 /* ARGSUSED */
816 static int
817 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
818 {
819 abuf_find_data_t data;
820 GElf_Sym sym;
821 int i;
822 const char *syms[] = {
823 "ARC_mru",
824 "ARC_mru_ghost",
825 "ARC_mfu",
826 "ARC_mfu_ghost",
827 };
828
829 if (argc != 2)
830 return (DCMD_USAGE);
831
832 for (i = 0; i < 2; i ++) {
833 switch (argv[i].a_type) {
834 case MDB_TYPE_STRING:
835 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str);
836 break;
837 case MDB_TYPE_IMMEDIATE:
838 data.dva.dva_word[i] = argv[i].a_un.a_val;
839 break;
840 default:
841 return (DCMD_USAGE);
842 }
843 }
844
845 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) {
846 mdb_warn("couldn't find struct arc_buf_hdr");
847 return (DCMD_ERR);
848 }
849
850 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) {
851 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) {
852 mdb_warn("can't find symbol %s", syms[i]);
853 return (DCMD_ERR);
854 }
855
856 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) {
857 mdb_warn("can't walk %s", syms[i]);
858 return (DCMD_ERR);
859 }
860 }
861
862 return (DCMD_OK);
863 }
864
865
866 typedef struct dbgmsg_arg {
867 boolean_t da_verbose;
868 boolean_t da_address;
869 } dbgmsg_arg_t;
870
871 /* ARGSUSED */
872 static int
873 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg)
874 {
875 static mdb_ctf_id_t id;
876 static boolean_t gotid;
877 static ulong_t off;
878
879 dbgmsg_arg_t *da = arg;
880 time_t timestamp;
881 char buf[1024];
882
883 if (!gotid) {
884 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) ==
885 -1) {
886 mdb_warn("couldn't find struct zfs_dbgmsg");
887 return (WALK_ERR);
888 }
889 gotid = TRUE;
890 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) {
891 mdb_warn("couldn't find zdm_msg");
892 return (WALK_ERR);
893 }
894 off /= 8;
895 }
896
897
898 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) {
899 return (WALK_ERR);
900 }
901
902 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) {
903 mdb_warn("failed to read zdm_msg at %p\n", addr + off);
904 return (DCMD_ERR);
905 }
906
907 if (da->da_address)
908 mdb_printf("%p ", addr);
909 if (da->da_verbose)
910 mdb_printf("%Y ", timestamp);
911
912 mdb_printf("%s\n", buf);
913
914 if (da->da_verbose)
915 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
916
917 return (WALK_NEXT);
918 }
919
920 /* ARGSUSED */
921 static int
922 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
923 {
924 GElf_Sym sym;
925 dbgmsg_arg_t da = { 0 };
926
927 if (mdb_getopts(argc, argv,
928 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose,
929 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address,
930 NULL) != argc)
931 return (DCMD_USAGE);
932
933 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) {
934 mdb_warn("can't find zfs_dbgmsgs");
935 return (DCMD_ERR);
936 }
937
938 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) {
939 mdb_warn("can't walk zfs_dbgmsgs");
940 return (DCMD_ERR);
941 }
942
943 return (DCMD_OK);
944 }
945
946 /*ARGSUSED*/
947 static int
948 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
949 {
950 kstat_named_t *stats;
951 GElf_Sym sym;
952 int nstats, i;
953 uint_t opt_a = FALSE;
954 uint_t opt_b = FALSE;
955 uint_t shift = 0;
956 const char *suffix;
957
958 static const char *bytestats[] = {
959 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size",
960 "arc_meta_used", "arc_meta_limit", "arc_meta_max",
961 NULL
962 };
963
964 static const char *extras[] = {
965 "arc_no_grow", "arc_tempreserve",
966 NULL
967 };
968
969 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) {
970 mdb_warn("failed to find 'arc_stats'");
971 return (DCMD_ERR);
972 }
973
974 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC);
975
976 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) {
977 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value);
978 return (DCMD_ERR);
979 }
980
981 nstats = sym.st_size / sizeof (kstat_named_t);
982
983 /* NB: -a / opt_a are ignored for backwards compatability */
984 if (mdb_getopts(argc, argv,
985 'a', MDB_OPT_SETBITS, TRUE, &opt_a,
986 'b', MDB_OPT_SETBITS, TRUE, &opt_b,
987 'k', MDB_OPT_SETBITS, 10, &shift,
988 'm', MDB_OPT_SETBITS, 20, &shift,
989 'g', MDB_OPT_SETBITS, 30, &shift,
990 NULL) != argc)
991 return (DCMD_USAGE);
992
993 if (!opt_b && !shift)
994 shift = 20;
995
996 switch (shift) {
997 case 0:
998 suffix = "B";
999 break;
1000 case 10:
1001 suffix = "KB";
1002 break;
1003 case 20:
1004 suffix = "MB";
1005 break;
1006 case 30:
1007 suffix = "GB";
1008 break;
1009 default:
1010 suffix = "XX";
1011 }
1012
1013 for (i = 0; i < nstats; i++) {
1014 int j;
1015 boolean_t bytes = B_FALSE;
1016
1017 for (j = 0; bytestats[j]; j++) {
1018 if (strcmp(stats[i].name, bytestats[j]) == 0) {
1019 bytes = B_TRUE;
1020 break;
1021 }
1022 }
1023
1024 if (bytes) {
1025 mdb_printf("%-25s = %9llu %s\n", stats[i].name,
1026 stats[i].value.ui64 >> shift, suffix);
1027 } else {
1028 mdb_printf("%-25s = %9llu\n", stats[i].name,
1029 stats[i].value.ui64);
1030 }
1031 }
1032
1033 for (i = 0; extras[i]; i++) {
1034 uint64_t buf;
1035
1036 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) {
1037 mdb_warn("failed to find '%s'", extras[i]);
1038 return (DCMD_ERR);
1039 }
1040
1041 if (sym.st_size != sizeof (uint64_t) &&
1042 sym.st_size != sizeof (uint32_t)) {
1043 mdb_warn("expected scalar for variable '%s'\n",
1044 extras[i]);
1045 return (DCMD_ERR);
1046 }
1047
1048 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) {
1049 mdb_warn("couldn't read '%s'", extras[i]);
1050 return (DCMD_ERR);
1051 }
1052
1053 mdb_printf("%-25s = ", extras[i]);
1054
1055 /* NB: all the 64-bit extras happen to be byte counts */
1056 if (sym.st_size == sizeof (uint64_t))
1057 mdb_printf("%9llu %s\n", buf >> shift, suffix);
1058
1059 if (sym.st_size == sizeof (uint32_t))
1060 mdb_printf("%9d\n", *((uint32_t *)&buf));
1061 }
1062 return (DCMD_OK);
1063 }
1064
1065 typedef struct mdb_spa_print {
1066 pool_state_t spa_state;
1067 char spa_name[MAXNAMELEN];
1068 } mdb_spa_print_t;
1069
1070 /*
1071 * ::spa
1072 *
1073 * -c Print configuration information as well
1074 * -v Print vdev state
1075 * -e Print vdev error stats
1076 * -m Print vdev metaslab info
1077 * -M print vdev metaslab group info
1078 * -h Print histogram info (must be combined with -m or -M)
1079 *
1080 * Print a summarized spa_t. When given no arguments, prints out a table of all
1081 * active pools on the system.
1082 */
1083 /* ARGSUSED */
1084 static int
1085 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1086 {
1087 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED",
1088 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" };
1089 const char *state;
1090 int spa_flags = 0;
1091
1092 if (mdb_getopts(argc, argv,
1093 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags,
1094 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags,
1095 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1096 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1097 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1098 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1099 NULL) != argc)
1100 return (DCMD_USAGE);
1101
1102 if (!(flags & DCMD_ADDRSPEC)) {
1103 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) {
1104 mdb_warn("can't walk spa");
1105 return (DCMD_ERR);
1106 }
1107
1108 return (DCMD_OK);
1109 }
1110
1111 if (flags & DCMD_PIPE_OUT) {
1112 mdb_printf("%#lr\n", addr);
1113 return (DCMD_OK);
1114 }
1115
1116 if (DCMD_HDRSPEC(flags))
1117 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE",
1118 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME");
1119
1120 mdb_spa_print_t spa;
1121 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1)
1122 return (DCMD_ERR);
1123
1124 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL)
1125 state = "UNKNOWN";
1126 else
1127 state = statetab[spa.spa_state];
1128
1129 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name);
1130
1131 if (spa_flags & SPA_FLAG_CONFIG) {
1132 mdb_printf("\n");
1133 mdb_inc_indent(4);
1134 if (mdb_call_dcmd("spa_config", addr, flags, 0,
1135 NULL) != DCMD_OK)
1136 return (DCMD_ERR);
1137 mdb_dec_indent(4);
1138 }
1139
1140 if (spa_flags & SPA_FLAG_ALL_VDEV) {
1141 mdb_arg_t v;
1142 char opts[100] = "-";
1143 int args =
1144 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1;
1145
1146 if (spa_flags & SPA_FLAG_ERRORS)
1147 strcat(opts, "e");
1148 if (spa_flags & SPA_FLAG_METASLABS)
1149 strcat(opts, "m");
1150 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1151 strcat(opts, "M");
1152 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1153 strcat(opts, "h");
1154
1155 v.a_type = MDB_TYPE_STRING;
1156 v.a_un.a_str = opts;
1157
1158 mdb_printf("\n");
1159 mdb_inc_indent(4);
1160 if (mdb_call_dcmd("spa_vdevs", addr, flags, args,
1161 &v) != DCMD_OK)
1162 return (DCMD_ERR);
1163 mdb_dec_indent(4);
1164 }
1165
1166 return (DCMD_OK);
1167 }
1168
1169 typedef struct mdb_spa_config_spa {
1170 uintptr_t spa_config;
1171 } mdb_spa_config_spa_t;
1172
1173 /*
1174 * ::spa_config
1175 *
1176 * Given a spa_t, print the configuration information stored in spa_config.
1177 * Since it's just an nvlist, format it as an indented list of name=value pairs.
1178 * We simply read the value of spa_config and pass off to ::nvlist.
1179 */
1180 /* ARGSUSED */
1181 static int
1182 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1183 {
1184 mdb_spa_config_spa_t spa;
1185
1186 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1187 return (DCMD_USAGE);
1188
1189 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t",
1190 addr, 0) == -1)
1191 return (DCMD_ERR);
1192
1193 if (spa.spa_config == 0) {
1194 mdb_printf("(none)\n");
1195 return (DCMD_OK);
1196 }
1197
1198 return (mdb_call_dcmd("nvlist", spa.spa_config, flags,
1199 0, NULL));
1200 }
1201
1202 const char histo_stars[] = "****************************************";
1203 const int histo_width = sizeof (histo_stars) - 1;
1204
1205 static void
1206 dump_histogram(const uint64_t *histo, int size, int offset)
1207 {
1208 int i;
1209 int minidx = size - 1;
1210 int maxidx = 0;
1211 uint64_t max = 0;
1212
1213 for (i = 0; i < size; i++) {
1214 if (histo[i] > max)
1215 max = histo[i];
1216 if (histo[i] > 0 && i > maxidx)
1217 maxidx = i;
1218 if (histo[i] > 0 && i < minidx)
1219 minidx = i;
1220 }
1221
1222 if (max < histo_width)
1223 max = histo_width;
1224
1225 for (i = minidx; i <= maxidx; i++) {
1226 mdb_printf("%3u: %6llu %s\n",
1227 i + offset, (u_longlong_t)histo[i],
1228 &histo_stars[(max - histo[i]) * histo_width / max]);
1229 }
1230 }
1231
1232 typedef struct mdb_range_tree {
1233 uint64_t rt_space;
1234 } mdb_range_tree_t;
1235
1236 typedef struct mdb_metaslab_group {
1237 uint64_t mg_fragmentation;
1238 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE];
1239 } mdb_metaslab_group_t;
1240
1241 typedef struct mdb_metaslab {
1242 uint64_t ms_id;
1243 uint64_t ms_start;
1244 uint64_t ms_size;
1245 uint64_t ms_fragmentation;
1246 uintptr_t ms_alloctree[TXG_SIZE];
1247 uintptr_t ms_freetree[TXG_SIZE];
1248 uintptr_t ms_tree;
1249 uintptr_t ms_sm;
1250 } mdb_metaslab_t;
1251
1252 typedef struct mdb_space_map_phys_t {
1253 uint64_t smp_alloc;
1254 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE];
1255 } mdb_space_map_phys_t;
1256
1257 typedef struct mdb_space_map {
1258 uint64_t sm_size;
1259 uint8_t sm_shift;
1260 uint64_t sm_alloc;
1261 uintptr_t sm_phys;
1262 } mdb_space_map_t;
1263
1264 typedef struct mdb_vdev {
1265 uintptr_t vdev_ms;
1266 uint64_t vdev_ms_count;
1267 vdev_stat_t vdev_stat;
1268 } mdb_vdev_t;
1269
1270 static int
1271 metaslab_stats(uintptr_t addr, int spa_flags)
1272 {
1273 mdb_vdev_t vdev;
1274 uintptr_t *vdev_ms;
1275
1276 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t",
1277 (uintptr_t)addr, 0) == -1) {
1278 mdb_warn("failed to read vdev at %p\n", addr);
1279 return (DCMD_ERR);
1280 }
1281
1282 mdb_inc_indent(4);
1283 mdb_printf("%<u>%-?s %6s %20s %10s %9s%</u>\n", "ADDR", "ID",
1284 "OFFSET", "FREE", "FRAGMENTATION");
1285
1286 vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *),
1287 UM_SLEEP | UM_GC);
1288 if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *),
1289 (uintptr_t)vdev.vdev_ms) == -1) {
1290 mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms);
1291 return (DCMD_ERR);
1292 }
1293
1294 for (int m = 0; m < vdev.vdev_ms_count; m++) {
1295 mdb_metaslab_t ms;
1296 mdb_space_map_t sm = { 0 };
1297 char free[NICENUM_BUFLEN];
1298
1299 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1300 (uintptr_t)vdev_ms[m], 0) == -1)
1301 return (DCMD_ERR);
1302
1303 if (ms.ms_sm != NULL &&
1304 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t",
1305 ms.ms_sm, 0) == -1)
1306 return (DCMD_ERR);
1307
1308 mdb_nicenum(ms.ms_size - sm.sm_alloc, free);
1309
1310 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id,
1311 ms.ms_start, free);
1312 if (ms.ms_fragmentation == ZFS_FRAG_INVALID)
1313 mdb_printf("%9s\n", "-");
1314 else
1315 mdb_printf("%9llu%%\n", ms.ms_fragmentation);
1316
1317 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != NULL) {
1318 mdb_space_map_phys_t smp;
1319
1320 if (sm.sm_phys == NULL)
1321 continue;
1322
1323 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1324 "mdb_space_map_phys_t", sm.sm_phys, 0);
1325
1326 dump_histogram(smp.smp_histogram,
1327 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift);
1328 }
1329 }
1330 mdb_dec_indent(4);
1331 return (DCMD_OK);
1332 }
1333
1334 static int
1335 metaslab_group_stats(uintptr_t addr, int spa_flags)
1336 {
1337 mdb_metaslab_group_t mg;
1338 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t",
1339 (uintptr_t)addr, 0) == -1) {
1340 mdb_warn("failed to read vdev_mg at %p\n", addr);
1341 return (DCMD_ERR);
1342 }
1343
1344 mdb_inc_indent(4);
1345 mdb_printf("%<u>%-?s %15s%</u>\n", "ADDR", "FRAGMENTATION");
1346 if (mg.mg_fragmentation == ZFS_FRAG_INVALID)
1347 mdb_printf("%0?p %15s\n", addr, "-");
1348 else
1349 mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation);
1350
1351 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1352 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1353 mdb_dec_indent(4);
1354 return (DCMD_OK);
1355 }
1356
1357 /*
1358 * ::vdev
1359 *
1360 * Print out a summarized vdev_t, in the following form:
1361 *
1362 * ADDR STATE AUX DESC
1363 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0
1364 *
1365 * If '-r' is specified, recursively visit all children.
1366 *
1367 * With '-e', the statistics associated with the vdev are printed as well.
1368 */
1369 static int
1370 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive,
1371 int spa_flags)
1372 {
1373 vdev_t vdev;
1374 char desc[MAXNAMELEN];
1375 int c, children;
1376 uintptr_t *child;
1377 const char *state, *aux;
1378
1379 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) {
1380 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr);
1381 return (DCMD_ERR);
1382 }
1383
1384 if (flags & DCMD_PIPE_OUT) {
1385 mdb_printf("%#lr\n", addr);
1386 } else {
1387 if (vdev.vdev_path != NULL) {
1388 if (mdb_readstr(desc, sizeof (desc),
1389 (uintptr_t)vdev.vdev_path) == -1) {
1390 mdb_warn("failed to read vdev_path at %p\n",
1391 vdev.vdev_path);
1392 return (DCMD_ERR);
1393 }
1394 } else if (vdev.vdev_ops != NULL) {
1395 vdev_ops_t ops;
1396 if (mdb_vread(&ops, sizeof (ops),
1397 (uintptr_t)vdev.vdev_ops) == -1) {
1398 mdb_warn("failed to read vdev_ops at %p\n",
1399 vdev.vdev_ops);
1400 return (DCMD_ERR);
1401 }
1402 (void) strcpy(desc, ops.vdev_op_type);
1403 } else {
1404 (void) strcpy(desc, "<unknown>");
1405 }
1406
1407 if (depth == 0 && DCMD_HDRSPEC(flags))
1408 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n",
1409 "ADDR", "STATE", "AUX",
1410 sizeof (uintptr_t) == 4 ? 43 : 35,
1411 "DESCRIPTION");
1412
1413 mdb_printf("%0?p ", addr);
1414
1415 switch (vdev.vdev_state) {
1416 case VDEV_STATE_CLOSED:
1417 state = "CLOSED";
1418 break;
1419 case VDEV_STATE_OFFLINE:
1420 state = "OFFLINE";
1421 break;
1422 case VDEV_STATE_CANT_OPEN:
1423 state = "CANT_OPEN";
1424 break;
1425 case VDEV_STATE_DEGRADED:
1426 state = "DEGRADED";
1427 break;
1428 case VDEV_STATE_HEALTHY:
1429 state = "HEALTHY";
1430 break;
1431 case VDEV_STATE_REMOVED:
1432 state = "REMOVED";
1433 break;
1434 case VDEV_STATE_FAULTED:
1435 state = "FAULTED";
1436 break;
1437 default:
1438 state = "UNKNOWN";
1439 break;
1440 }
1441
1442 switch (vdev.vdev_stat.vs_aux) {
1443 case VDEV_AUX_NONE:
1444 aux = "-";
1445 break;
1446 case VDEV_AUX_OPEN_FAILED:
1447 aux = "OPEN_FAILED";
1448 break;
1449 case VDEV_AUX_CORRUPT_DATA:
1450 aux = "CORRUPT_DATA";
1451 break;
1452 case VDEV_AUX_NO_REPLICAS:
1453 aux = "NO_REPLICAS";
1454 break;
1455 case VDEV_AUX_BAD_GUID_SUM:
1456 aux = "BAD_GUID_SUM";
1457 break;
1458 case VDEV_AUX_TOO_SMALL:
1459 aux = "TOO_SMALL";
1460 break;
1461 case VDEV_AUX_BAD_LABEL:
1462 aux = "BAD_LABEL";
1463 break;
1464 case VDEV_AUX_VERSION_NEWER:
1465 aux = "VERS_NEWER";
1466 break;
1467 case VDEV_AUX_VERSION_OLDER:
1468 aux = "VERS_OLDER";
1469 break;
1470 case VDEV_AUX_UNSUP_FEAT:
1471 aux = "UNSUP_FEAT";
1472 break;
1473 case VDEV_AUX_SPARED:
1474 aux = "SPARED";
1475 break;
1476 case VDEV_AUX_ERR_EXCEEDED:
1477 aux = "ERR_EXCEEDED";
1478 break;
1479 case VDEV_AUX_IO_FAILURE:
1480 aux = "IO_FAILURE";
1481 break;
1482 case VDEV_AUX_BAD_LOG:
1483 aux = "BAD_LOG";
1484 break;
1485 case VDEV_AUX_EXTERNAL:
1486 aux = "EXTERNAL";
1487 break;
1488 case VDEV_AUX_SPLIT_POOL:
1489 aux = "SPLIT_POOL";
1490 break;
1491 default:
1492 aux = "UNKNOWN";
1493 break;
1494 }
1495
1496 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc);
1497
1498 if (spa_flags & SPA_FLAG_ERRORS) {
1499 vdev_stat_t *vs = &vdev.vdev_stat;
1500 int i;
1501
1502 mdb_inc_indent(4);
1503 mdb_printf("\n");
1504 mdb_printf("%<u> %12s %12s %12s %12s "
1505 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM",
1506 "IOCTL");
1507 mdb_printf("OPS ");
1508 for (i = 1; i < ZIO_TYPES; i++)
1509 mdb_printf("%11#llx%s", vs->vs_ops[i],
1510 i == ZIO_TYPES - 1 ? "" : " ");
1511 mdb_printf("\n");
1512 mdb_printf("BYTES ");
1513 for (i = 1; i < ZIO_TYPES; i++)
1514 mdb_printf("%11#llx%s", vs->vs_bytes[i],
1515 i == ZIO_TYPES - 1 ? "" : " ");
1516
1517
1518 mdb_printf("\n");
1519 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors);
1520 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors);
1521 mdb_printf("ECKSUM %10#llx\n",
1522 vs->vs_checksum_errors);
1523 mdb_dec_indent(4);
1524 mdb_printf("\n");
1525 }
1526
1527 if (spa_flags & SPA_FLAG_METASLAB_GROUPS &&
1528 vdev.vdev_mg != NULL) {
1529 metaslab_group_stats((uintptr_t)vdev.vdev_mg,
1530 spa_flags);
1531 }
1532 if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) {
1533 metaslab_stats((uintptr_t)addr, spa_flags);
1534 }
1535 }
1536
1537 children = vdev.vdev_children;
1538
1539 if (children == 0 || !recursive)
1540 return (DCMD_OK);
1541
1542 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC);
1543 if (mdb_vread(child, children * sizeof (void *),
1544 (uintptr_t)vdev.vdev_child) == -1) {
1545 mdb_warn("failed to read vdev children at %p", vdev.vdev_child);
1546 return (DCMD_ERR);
1547 }
1548
1549 for (c = 0; c < children; c++) {
1550 if (do_print_vdev(child[c], flags, depth + 2, recursive,
1551 spa_flags)) {
1552 return (DCMD_ERR);
1553 }
1554 }
1555
1556 return (DCMD_OK);
1557 }
1558
1559 static int
1560 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1561 {
1562 uint64_t depth = 0;
1563 boolean_t recursive = B_FALSE;
1564 int spa_flags = 0;
1565
1566 if (mdb_getopts(argc, argv,
1567 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1568 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1569 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1570 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1571 'r', MDB_OPT_SETBITS, TRUE, &recursive,
1572 'd', MDB_OPT_UINT64, &depth, NULL) != argc)
1573 return (DCMD_USAGE);
1574
1575 if (!(flags & DCMD_ADDRSPEC)) {
1576 mdb_warn("no vdev_t address given\n");
1577 return (DCMD_ERR);
1578 }
1579
1580 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags));
1581 }
1582
1583 typedef struct metaslab_walk_data {
1584 uint64_t mw_numvdevs;
1585 uintptr_t *mw_vdevs;
1586 int mw_curvdev;
1587 uint64_t mw_nummss;
1588 uintptr_t *mw_mss;
1589 int mw_curms;
1590 } metaslab_walk_data_t;
1591
1592 static int
1593 metaslab_walk_step(mdb_walk_state_t *wsp)
1594 {
1595 metaslab_walk_data_t *mw = wsp->walk_data;
1596 metaslab_t ms;
1597 uintptr_t msp;
1598
1599 if (mw->mw_curvdev >= mw->mw_numvdevs)
1600 return (WALK_DONE);
1601
1602 if (mw->mw_mss == NULL) {
1603 uintptr_t mssp;
1604 uintptr_t vdevp;
1605
1606 ASSERT(mw->mw_curms == 0);
1607 ASSERT(mw->mw_nummss == 0);
1608
1609 vdevp = mw->mw_vdevs[mw->mw_curvdev];
1610 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) ||
1611 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) {
1612 return (WALK_ERR);
1613 }
1614
1615 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*),
1616 UM_SLEEP | UM_GC);
1617 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*),
1618 mssp) == -1) {
1619 mdb_warn("failed to read vdev_ms at %p", mssp);
1620 return (WALK_ERR);
1621 }
1622 }
1623
1624 if (mw->mw_curms >= mw->mw_nummss) {
1625 mw->mw_mss = NULL;
1626 mw->mw_curms = 0;
1627 mw->mw_nummss = 0;
1628 mw->mw_curvdev++;
1629 return (WALK_NEXT);
1630 }
1631
1632 msp = mw->mw_mss[mw->mw_curms];
1633 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) {
1634 mdb_warn("failed to read metaslab_t at %p", msp);
1635 return (WALK_ERR);
1636 }
1637
1638 mw->mw_curms++;
1639
1640 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata));
1641 }
1642
1643 /* ARGSUSED */
1644 static int
1645 metaslab_walk_init(mdb_walk_state_t *wsp)
1646 {
1647 metaslab_walk_data_t *mw;
1648 uintptr_t root_vdevp;
1649 uintptr_t childp;
1650
1651 if (wsp->walk_addr == NULL) {
1652 mdb_warn("must supply address of spa_t\n");
1653 return (WALK_ERR);
1654 }
1655
1656 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC);
1657
1658 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) ||
1659 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) ||
1660 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) {
1661 return (DCMD_ERR);
1662 }
1663
1664 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *),
1665 UM_SLEEP | UM_GC);
1666 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *),
1667 childp) == -1) {
1668 mdb_warn("failed to read root vdev children at %p", childp);
1669 return (DCMD_ERR);
1670 }
1671
1672 wsp->walk_data = mw;
1673
1674 return (WALK_NEXT);
1675 }
1676
1677 typedef struct mdb_spa {
1678 uintptr_t spa_dsl_pool;
1679 uintptr_t spa_root_vdev;
1680 } mdb_spa_t;
1681
1682 typedef struct mdb_dsl_dir {
1683 uintptr_t dd_phys;
1684 int64_t dd_space_towrite[TXG_SIZE];
1685 } mdb_dsl_dir_t;
1686
1687 typedef struct mdb_dsl_dir_phys {
1688 uint64_t dd_used_bytes;
1689 uint64_t dd_compressed_bytes;
1690 uint64_t dd_uncompressed_bytes;
1691 } mdb_dsl_dir_phys_t;
1692
1693 typedef struct space_data {
1694 uint64_t ms_alloctree[TXG_SIZE];
1695 uint64_t ms_freetree[TXG_SIZE];
1696 uint64_t ms_tree;
1697 uint64_t avail;
1698 uint64_t nowavail;
1699 } space_data_t;
1700
1701 /* ARGSUSED */
1702 static int
1703 space_cb(uintptr_t addr, const void *unknown, void *arg)
1704 {
1705 space_data_t *sd = arg;
1706 mdb_metaslab_t ms;
1707 mdb_range_tree_t rt;
1708 mdb_space_map_t sm = { 0 };
1709 mdb_space_map_phys_t smp = { 0 };
1710 int i;
1711
1712 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1713 addr, 0) == -1)
1714 return (WALK_ERR);
1715
1716 for (i = 0; i < TXG_SIZE; i++) {
1717 if (mdb_ctf_vread(&rt, "range_tree_t",
1718 "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1)
1719 return (WALK_ERR);
1720
1721 sd->ms_alloctree[i] += rt.rt_space;
1722
1723 if (mdb_ctf_vread(&rt, "range_tree_t",
1724 "mdb_range_tree_t", ms.ms_freetree[i], 0) == -1)
1725 return (WALK_ERR);
1726
1727 sd->ms_freetree[i] += rt.rt_space;
1728 }
1729
1730 if (mdb_ctf_vread(&rt, "range_tree_t",
1731 "mdb_range_tree_t", ms.ms_tree, 0) == -1)
1732 return (WALK_ERR);
1733
1734 if (ms.ms_sm != NULL &&
1735 mdb_ctf_vread(&sm, "space_map_t",
1736 "mdb_space_map_t", ms.ms_sm, 0) == -1)
1737 return (WALK_ERR);
1738
1739 if (sm.sm_phys != NULL) {
1740 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1741 "mdb_space_map_phys_t", sm.sm_phys, 0);
1742 }
1743
1744 sd->ms_tree += rt.rt_space;
1745 sd->avail += sm.sm_size - sm.sm_alloc;
1746 sd->nowavail += sm.sm_size - smp.smp_alloc;
1747
1748 return (WALK_NEXT);
1749 }
1750
1751 /*
1752 * ::spa_space [-b]
1753 *
1754 * Given a spa_t, print out it's on-disk space usage and in-core
1755 * estimates of future usage. If -b is given, print space in bytes.
1756 * Otherwise print in megabytes.
1757 */
1758 /* ARGSUSED */
1759 static int
1760 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1761 {
1762 mdb_spa_t spa;
1763 uintptr_t dp_root_dir;
1764 mdb_dsl_dir_t dd;
1765 mdb_dsl_dir_phys_t dsp;
1766 uint64_t children;
1767 uintptr_t childaddr;
1768 space_data_t sd;
1769 int shift = 20;
1770 char *suffix = "M";
1771 int bytes = B_FALSE;
1772
1773 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) !=
1774 argc)
1775 return (DCMD_USAGE);
1776 if (!(flags & DCMD_ADDRSPEC))
1777 return (DCMD_USAGE);
1778
1779 if (bytes) {
1780 shift = 0;
1781 suffix = "";
1782 }
1783
1784 if (GETMEMB(addr, "spa", spa_dsl_pool, spa.spa_dsl_pool) ||
1785 GETMEMB(addr, "spa", spa_root_vdev, spa.spa_root_vdev) ||
1786 GETMEMB(spa.spa_root_vdev, "vdev", vdev_children, children) ||
1787 GETMEMB(spa.spa_root_vdev, "vdev", vdev_child, childaddr) ||
1788 GETMEMB(spa.spa_dsl_pool, "dsl_pool",
1789 dp_root_dir, dp_root_dir) ||
1790 GETMEMB(dp_root_dir, "dsl_dir", dd_phys, dd.dd_phys) ||
1791 GETMEMB(dp_root_dir, "dsl_dir",
1792 dd_space_towrite, dd.dd_space_towrite) ||
1793 GETMEMB(dd.dd_phys, "dsl_dir_phys",
1794 dd_used_bytes, dsp.dd_used_bytes) ||
1795 GETMEMB(dd.dd_phys, "dsl_dir_phys",
1796 dd_compressed_bytes, dsp.dd_compressed_bytes) ||
1797 GETMEMB(dd.dd_phys, "dsl_dir_phys",
1798 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) {
1799 return (DCMD_ERR);
1800 }
1801
1802 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n",
1803 dd.dd_space_towrite[0] >> shift, suffix,
1804 dd.dd_space_towrite[1] >> shift, suffix,
1805 dd.dd_space_towrite[2] >> shift, suffix,
1806 dd.dd_space_towrite[3] >> shift, suffix);
1807
1808 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n",
1809 dsp.dd_used_bytes >> shift, suffix);
1810 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n",
1811 dsp.dd_compressed_bytes >> shift, suffix);
1812 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n",
1813 dsp.dd_uncompressed_bytes >> shift, suffix);
1814
1815 bzero(&sd, sizeof (sd));
1816 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) {
1817 mdb_warn("can't walk metaslabs");
1818 return (DCMD_ERR);
1819 }
1820
1821 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n",
1822 sd.ms_alloctree[0] >> shift, suffix,
1823 sd.ms_alloctree[1] >> shift, suffix,
1824 sd.ms_alloctree[2] >> shift, suffix,
1825 sd.ms_alloctree[3] >> shift, suffix);
1826 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n",
1827 sd.ms_freetree[0] >> shift, suffix,
1828 sd.ms_freetree[1] >> shift, suffix,
1829 sd.ms_freetree[2] >> shift, suffix,
1830 sd.ms_freetree[3] >> shift, suffix);
1831 mdb_printf("ms_tree = %llu%s\n", sd.ms_tree >> shift, suffix);
1832 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix);
1833 mdb_printf("current syncing avail = %llu%s\n",
1834 sd.nowavail >> shift, suffix);
1835
1836 return (DCMD_OK);
1837 }
1838
1839 typedef struct mdb_spa_aux_vdev {
1840 int sav_count;
1841 uintptr_t sav_vdevs;
1842 } mdb_spa_aux_vdev_t;
1843
1844 typedef struct mdb_spa_vdevs {
1845 uintptr_t spa_root_vdev;
1846 mdb_spa_aux_vdev_t spa_l2cache;
1847 mdb_spa_aux_vdev_t spa_spares;
1848 } mdb_spa_vdevs_t;
1849
1850 static int
1851 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v,
1852 const char *name)
1853 {
1854 uintptr_t *aux;
1855 size_t len;
1856 int ret, i;
1857
1858 /*
1859 * Iterate over aux vdevs and print those out as well. This is a
1860 * little annoying because we don't have a root vdev to pass to ::vdev.
1861 * Instead, we print a single line and then call it for each child
1862 * vdev.
1863 */
1864 if (sav->sav_count != 0) {
1865 v[1].a_type = MDB_TYPE_STRING;
1866 v[1].a_un.a_str = "-d";
1867 v[2].a_type = MDB_TYPE_IMMEDIATE;
1868 v[2].a_un.a_val = 2;
1869
1870 len = sav->sav_count * sizeof (uintptr_t);
1871 aux = mdb_alloc(len, UM_SLEEP);
1872 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) {
1873 mdb_free(aux, len);
1874 mdb_warn("failed to read l2cache vdevs at %p",
1875 sav->sav_vdevs);
1876 return (DCMD_ERR);
1877 }
1878
1879 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name);
1880
1881 for (i = 0; i < sav->sav_count; i++) {
1882 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v);
1883 if (ret != DCMD_OK) {
1884 mdb_free(aux, len);
1885 return (ret);
1886 }
1887 }
1888
1889 mdb_free(aux, len);
1890 }
1891
1892 return (0);
1893 }
1894
1895 /*
1896 * ::spa_vdevs
1897 *
1898 * -e Include error stats
1899 * -m Include metaslab information
1900 * -M Include metaslab group information
1901 * -h Include histogram information (requires -m or -M)
1902 *
1903 * Print out a summarized list of vdevs for the given spa_t.
1904 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as
1905 * iterating over the cache devices.
1906 */
1907 /* ARGSUSED */
1908 static int
1909 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1910 {
1911 mdb_arg_t v[3];
1912 int ret;
1913 char opts[100] = "-r";
1914 int spa_flags = 0;
1915
1916 if (mdb_getopts(argc, argv,
1917 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1918 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1919 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1920 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1921 NULL) != argc)
1922 return (DCMD_USAGE);
1923
1924 if (!(flags & DCMD_ADDRSPEC))
1925 return (DCMD_USAGE);
1926
1927 mdb_spa_vdevs_t spa;
1928 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1)
1929 return (DCMD_ERR);
1930
1931 /*
1932 * Unitialized spa_t structures can have a NULL root vdev.
1933 */
1934 if (spa.spa_root_vdev == NULL) {
1935 mdb_printf("no associated vdevs\n");
1936 return (DCMD_OK);
1937 }
1938
1939 if (spa_flags & SPA_FLAG_ERRORS)
1940 strcat(opts, "e");
1941 if (spa_flags & SPA_FLAG_METASLABS)
1942 strcat(opts, "m");
1943 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1944 strcat(opts, "M");
1945 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1946 strcat(opts, "h");
1947
1948 v[0].a_type = MDB_TYPE_STRING;
1949 v[0].a_un.a_str = opts;
1950
1951 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev,
1952 flags, 1, v);
1953 if (ret != DCMD_OK)
1954 return (ret);
1955
1956 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 ||
1957 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0)
1958 return (DCMD_ERR);
1959
1960 return (DCMD_OK);
1961 }
1962
1963 /*
1964 * ::zio
1965 *
1966 * Print a summary of zio_t and all its children. This is intended to display a
1967 * zio tree, and hence we only pick the most important pieces of information for
1968 * the main summary. More detailed information can always be found by doing a
1969 * '::print zio' on the underlying zio_t. The columns we display are:
1970 *
1971 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED
1972 *
1973 * The 'address' column is indented by one space for each depth level as we
1974 * descend down the tree.
1975 */
1976
1977 #define ZIO_MAXINDENT 7
1978 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT)
1979 #define ZIO_WALK_SELF 0
1980 #define ZIO_WALK_CHILD 1
1981 #define ZIO_WALK_PARENT 2
1982
1983 typedef struct zio_print_args {
1984 int zpa_current_depth;
1985 int zpa_min_depth;
1986 int zpa_max_depth;
1987 int zpa_type;
1988 uint_t zpa_flags;
1989 } zio_print_args_t;
1990
1991 typedef struct mdb_zio {
1992 enum zio_type io_type;
1993 enum zio_stage io_stage;
1994 uintptr_t io_waiter;
1995 uintptr_t io_spa;
1996 struct {
1997 struct {
1998 uintptr_t list_next;
1999 } list_head;
2000 } io_parent_list;
2001 int io_error;
2002 } mdb_zio_t;
2003
2004 typedef struct mdb_zio_timestamp {
2005 hrtime_t io_timestamp;
2006 } mdb_zio_timestamp_t;
2007
2008 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg);
2009
2010 static int
2011 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa)
2012 {
2013 mdb_ctf_id_t type_enum, stage_enum;
2014 int indent = zpa->zpa_current_depth;
2015 const char *type, *stage;
2016 uintptr_t laddr;
2017 mdb_zio_t zio;
2018 mdb_zio_timestamp_t zio_timestamp = { 0 };
2019
2020 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1)
2021 return (WALK_ERR);
2022 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio",
2023 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET);
2024
2025 if (indent > ZIO_MAXINDENT)
2026 indent = ZIO_MAXINDENT;
2027
2028 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 ||
2029 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) {
2030 mdb_warn("failed to lookup zio enums");
2031 return (WALK_ERR);
2032 }
2033
2034 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL)
2035 type += sizeof ("ZIO_TYPE_") - 1;
2036 else
2037 type = "?";
2038
2039 if (zio.io_error == 0) {
2040 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage);
2041 if (stage != NULL)
2042 stage += sizeof ("ZIO_STAGE_") - 1;
2043 else
2044 stage = "?";
2045 } else {
2046 stage = "FAILED";
2047 }
2048
2049 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) {
2050 if (zpa->zpa_flags & DCMD_PIPE_OUT) {
2051 mdb_printf("%?p\n", addr);
2052 } else {
2053 mdb_printf("%*s%-*p %-5s %-16s ", indent, "",
2054 ZIO_MAXWIDTH - indent, addr, type, stage);
2055 if (zio.io_waiter != 0)
2056 mdb_printf("%-16lx ", zio.io_waiter);
2057 else
2058 mdb_printf("%-16s ", "-");
2059 #ifdef _KERNEL
2060 if (zio_timestamp.io_timestamp != 0) {
2061 mdb_printf("%llums", (mdb_gethrtime() -
2062 zio_timestamp.io_timestamp) /
2063 1000000);
2064 } else {
2065 mdb_printf("%-12s ", "-");
2066 }
2067 #else
2068 mdb_printf("%-12s ", "-");
2069 #endif
2070 mdb_printf("\n");
2071 }
2072 }
2073
2074 if (zpa->zpa_current_depth >= zpa->zpa_max_depth)
2075 return (WALK_NEXT);
2076
2077 if (zpa->zpa_type == ZIO_WALK_PARENT)
2078 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2079 "io_parent_list");
2080 else
2081 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2082 "io_child_list");
2083
2084 zpa->zpa_current_depth++;
2085 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) {
2086 mdb_warn("failed to walk zio_t children at %p\n", laddr);
2087 return (WALK_ERR);
2088 }
2089 zpa->zpa_current_depth--;
2090
2091 return (WALK_NEXT);
2092 }
2093
2094 /* ARGSUSED */
2095 static int
2096 zio_child_cb(uintptr_t addr, const void *unknown, void *arg)
2097 {
2098 zio_link_t zl;
2099 uintptr_t ziop;
2100 zio_print_args_t *zpa = arg;
2101
2102 if (mdb_vread(&zl, sizeof (zl), addr) == -1) {
2103 mdb_warn("failed to read zio_link_t at %p", addr);
2104 return (WALK_ERR);
2105 }
2106
2107 if (zpa->zpa_type == ZIO_WALK_PARENT)
2108 ziop = (uintptr_t)zl.zl_parent;
2109 else
2110 ziop = (uintptr_t)zl.zl_child;
2111
2112 return (zio_print_cb(ziop, zpa));
2113 }
2114
2115 /* ARGSUSED */
2116 static int
2117 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2118 {
2119 zio_print_args_t zpa = { 0 };
2120
2121 if (!(flags & DCMD_ADDRSPEC))
2122 return (DCMD_USAGE);
2123
2124 if (mdb_getopts(argc, argv,
2125 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth,
2126 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type,
2127 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type,
2128 NULL) != argc)
2129 return (DCMD_USAGE);
2130
2131 zpa.zpa_flags = flags;
2132 if (zpa.zpa_max_depth != 0) {
2133 if (zpa.zpa_type == ZIO_WALK_SELF)
2134 zpa.zpa_type = ZIO_WALK_CHILD;
2135 } else if (zpa.zpa_type != ZIO_WALK_SELF) {
2136 zpa.zpa_min_depth = 1;
2137 zpa.zpa_max_depth = 1;
2138 }
2139
2140 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) {
2141 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n",
2142 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER",
2143 "TIME_ELAPSED");
2144 }
2145
2146 if (zio_print_cb(addr, &zpa) != WALK_NEXT)
2147 return (DCMD_ERR);
2148
2149 return (DCMD_OK);
2150 }
2151
2152 /*
2153 * [addr]::zio_state
2154 *
2155 * Print a summary of all zio_t structures on the system, or for a particular
2156 * pool. This is equivalent to '::walk zio_root | ::zio'.
2157 */
2158 /*ARGSUSED*/
2159 static int
2160 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2161 {
2162 /*
2163 * MDB will remember the last address of the pipeline, so if we don't
2164 * zero this we'll end up trying to walk zio structures for a
2165 * non-existent spa_t.
2166 */
2167 if (!(flags & DCMD_ADDRSPEC))
2168 addr = 0;
2169
2170 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr));
2171 }
2172
2173 typedef struct txg_list_walk_data {
2174 uintptr_t lw_head[TXG_SIZE];
2175 int lw_txgoff;
2176 int lw_maxoff;
2177 size_t lw_offset;
2178 void *lw_obj;
2179 } txg_list_walk_data_t;
2180
2181 static int
2182 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff)
2183 {
2184 txg_list_walk_data_t *lwd;
2185 txg_list_t list;
2186 int i;
2187
2188 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC);
2189 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) {
2190 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr);
2191 return (WALK_ERR);
2192 }
2193
2194 for (i = 0; i < TXG_SIZE; i++)
2195 lwd->lw_head[i] = (uintptr_t)list.tl_head[i];
2196 lwd->lw_offset = list.tl_offset;
2197 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t),
2198 UM_SLEEP | UM_GC);
2199 lwd->lw_txgoff = txg;
2200 lwd->lw_maxoff = maxoff;
2201
2202 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2203 wsp->walk_data = lwd;
2204
2205 return (WALK_NEXT);
2206 }
2207
2208 static int
2209 txg_list_walk_init(mdb_walk_state_t *wsp)
2210 {
2211 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1));
2212 }
2213
2214 static int
2215 txg_list0_walk_init(mdb_walk_state_t *wsp)
2216 {
2217 return (txg_list_walk_init_common(wsp, 0, 0));
2218 }
2219
2220 static int
2221 txg_list1_walk_init(mdb_walk_state_t *wsp)
2222 {
2223 return (txg_list_walk_init_common(wsp, 1, 1));
2224 }
2225
2226 static int
2227 txg_list2_walk_init(mdb_walk_state_t *wsp)
2228 {
2229 return (txg_list_walk_init_common(wsp, 2, 2));
2230 }
2231
2232 static int
2233 txg_list3_walk_init(mdb_walk_state_t *wsp)
2234 {
2235 return (txg_list_walk_init_common(wsp, 3, 3));
2236 }
2237
2238 static int
2239 txg_list_walk_step(mdb_walk_state_t *wsp)
2240 {
2241 txg_list_walk_data_t *lwd = wsp->walk_data;
2242 uintptr_t addr;
2243 txg_node_t *node;
2244 int status;
2245
2246 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) {
2247 lwd->lw_txgoff++;
2248 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2249 }
2250
2251 if (wsp->walk_addr == NULL)
2252 return (WALK_DONE);
2253
2254 addr = wsp->walk_addr - lwd->lw_offset;
2255
2256 if (mdb_vread(lwd->lw_obj,
2257 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) {
2258 mdb_warn("failed to read list element at %#lx", addr);
2259 return (WALK_ERR);
2260 }
2261
2262 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata);
2263 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset);
2264 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff];
2265
2266 return (status);
2267 }
2268
2269 /*
2270 * ::walk spa
2271 *
2272 * Walk all named spa_t structures in the namespace. This is nothing more than
2273 * a layered avl walk.
2274 */
2275 static int
2276 spa_walk_init(mdb_walk_state_t *wsp)
2277 {
2278 GElf_Sym sym;
2279
2280 if (wsp->walk_addr != NULL) {
2281 mdb_warn("spa walk only supports global walks\n");
2282 return (WALK_ERR);
2283 }
2284
2285 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) {
2286 mdb_warn("failed to find symbol 'spa_namespace_avl'");
2287 return (WALK_ERR);
2288 }
2289
2290 wsp->walk_addr = (uintptr_t)sym.st_value;
2291
2292 if (mdb_layered_walk("avl", wsp) == -1) {
2293 mdb_warn("failed to walk 'avl'\n");
2294 return (WALK_ERR);
2295 }
2296
2297 return (WALK_NEXT);
2298 }
2299
2300 static int
2301 spa_walk_step(mdb_walk_state_t *wsp)
2302 {
2303 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata));
2304 }
2305
2306 /*
2307 * [addr]::walk zio
2308 *
2309 * Walk all active zio_t structures on the system. This is simply a layered
2310 * walk on top of ::walk zio_cache, with the optional ability to limit the
2311 * structures to a particular pool.
2312 */
2313 static int
2314 zio_walk_init(mdb_walk_state_t *wsp)
2315 {
2316 wsp->walk_data = (void *)wsp->walk_addr;
2317
2318 if (mdb_layered_walk("zio_cache", wsp) == -1) {
2319 mdb_warn("failed to walk 'zio_cache'\n");
2320 return (WALK_ERR);
2321 }
2322
2323 return (WALK_NEXT);
2324 }
2325
2326 static int
2327 zio_walk_step(mdb_walk_state_t *wsp)
2328 {
2329 mdb_zio_t zio;
2330 uintptr_t spa = (uintptr_t)wsp->walk_data;
2331
2332 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2333 wsp->walk_addr, 0) == -1)
2334 return (WALK_ERR);
2335
2336 if (spa != 0 && spa != zio.io_spa)
2337 return (WALK_NEXT);
2338
2339 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2340 }
2341
2342 /*
2343 * [addr]::walk zio_root
2344 *
2345 * Walk only root zio_t structures, optionally for a particular spa_t.
2346 */
2347 static int
2348 zio_walk_root_step(mdb_walk_state_t *wsp)
2349 {
2350 mdb_zio_t zio;
2351 uintptr_t spa = (uintptr_t)wsp->walk_data;
2352
2353 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2354 wsp->walk_addr, 0) == -1)
2355 return (WALK_ERR);
2356
2357 if (spa != 0 && spa != zio.io_spa)
2358 return (WALK_NEXT);
2359
2360 /* If the parent list is not empty, ignore */
2361 if (zio.io_parent_list.list_head.list_next !=
2362 wsp->walk_addr +
2363 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") +
2364 mdb_ctf_offsetof_by_name("struct list", "list_head"))
2365 return (WALK_NEXT);
2366
2367 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2368 }
2369
2370 /*
2371 * ::zfs_blkstats
2372 *
2373 * -v print verbose per-level information
2374 *
2375 */
2376 static int
2377 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2378 {
2379 boolean_t verbose = B_FALSE;
2380 zfs_all_blkstats_t stats;
2381 dmu_object_type_t t;
2382 zfs_blkstat_t *tzb;
2383 uint64_t ditto;
2384 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10];
2385 /* +10 in case it grew */
2386
2387 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) {
2388 mdb_warn("failed to read 'dmu_ot'");
2389 return (DCMD_ERR);
2390 }
2391
2392 if (mdb_getopts(argc, argv,
2393 'v', MDB_OPT_SETBITS, TRUE, &verbose,
2394 NULL) != argc)
2395 return (DCMD_USAGE);
2396
2397 if (!(flags & DCMD_ADDRSPEC))
2398 return (DCMD_USAGE);
2399
2400 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) ||
2401 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) ||
2402 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) {
2403 mdb_warn("failed to read data at %p;", addr);
2404 mdb_printf("maybe no stats? run \"zpool scrub\" first.");
2405 return (DCMD_ERR);
2406 }
2407
2408 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL];
2409 if (tzb->zb_gangs != 0) {
2410 mdb_printf("Ganged blocks: %llu\n",
2411 (longlong_t)tzb->zb_gangs);
2412 }
2413
2414 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev +
2415 tzb->zb_ditto_3_of_3_samevdev;
2416 if (ditto != 0) {
2417 mdb_printf("Dittoed blocks on same vdev: %llu\n",
2418 (longlong_t)ditto);
2419 }
2420
2421 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2422 "\t avg\t comp\t%%Total\tType\n");
2423
2424 for (t = 0; t <= DMU_OT_TOTAL; t++) {
2425 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN];
2426 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN];
2427 char avg[NICENUM_BUFLEN];
2428 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN];
2429 char typename[64];
2430 int l;
2431
2432
2433 if (t == DMU_OT_DEFERRED)
2434 strcpy(typename, "deferred free");
2435 else if (t == DMU_OT_OTHER)
2436 strcpy(typename, "other");
2437 else if (t == DMU_OT_TOTAL)
2438 strcpy(typename, "Total");
2439 else if (mdb_readstr(typename, sizeof (typename),
2440 (uintptr_t)dmu_ot[t].ot_name) == -1) {
2441 mdb_warn("failed to read type name");
2442 return (DCMD_ERR);
2443 }
2444
2445 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0)
2446 continue;
2447
2448 for (l = -1; l < DN_MAX_LEVELS; l++) {
2449 int level = (l == -1 ? DN_MAX_LEVELS : l);
2450 zfs_blkstat_t *zb = &stats.zab_type[level][t];
2451
2452 if (zb->zb_asize == 0)
2453 continue;
2454
2455 /*
2456 * Don't print each level unless requested.
2457 */
2458 if (!verbose && level != DN_MAX_LEVELS)
2459 continue;
2460
2461 /*
2462 * If all the space is level 0, don't print the
2463 * level 0 separately.
2464 */
2465 if (level == 0 && zb->zb_asize ==
2466 stats.zab_type[DN_MAX_LEVELS][t].zb_asize)
2467 continue;
2468
2469 mdb_nicenum(zb->zb_count, csize);
2470 mdb_nicenum(zb->zb_lsize, lsize);
2471 mdb_nicenum(zb->zb_psize, psize);
2472 mdb_nicenum(zb->zb_asize, asize);
2473 mdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2474 (void) snprintfrac(comp, NICENUM_BUFLEN,
2475 zb->zb_lsize, zb->zb_psize, 2);
2476 (void) snprintfrac(pct, NICENUM_BUFLEN,
2477 100 * zb->zb_asize, tzb->zb_asize, 2);
2478
2479 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s"
2480 "\t%5s\t%6s\t",
2481 csize, lsize, psize, asize, avg, comp, pct);
2482
2483 if (level == DN_MAX_LEVELS)
2484 mdb_printf("%s\n", typename);
2485 else
2486 mdb_printf(" L%d %s\n",
2487 level, typename);
2488 }
2489 }
2490
2491 return (DCMD_OK);
2492 }
2493
2494 typedef struct mdb_reference {
2495 uintptr_t ref_holder;
2496 uintptr_t ref_removed;
2497 uint64_t ref_number;
2498 } mdb_reference_t;
2499
2500 /* ARGSUSED */
2501 static int
2502 reference_cb(uintptr_t addr, const void *ignored, void *arg)
2503 {
2504 mdb_reference_t ref;
2505 boolean_t holder_is_str = B_FALSE;
2506 char holder_str[128];
2507 boolean_t removed = (boolean_t)arg;
2508
2509 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr,
2510 0) == -1)
2511 return (DCMD_ERR);
2512
2513 if (mdb_readstr(holder_str, sizeof (holder_str),
2514 ref.ref_holder) != -1)
2515 holder_is_str = strisprint(holder_str);
2516
2517 if (removed)
2518 mdb_printf("removed ");
2519 mdb_printf("reference ");
2520 if (ref.ref_number != 1)
2521 mdb_printf("with count=%llu ", ref.ref_number);
2522 mdb_printf("with tag %lx", ref.ref_holder);
2523 if (holder_is_str)
2524 mdb_printf(" \"%s\"", holder_str);
2525 mdb_printf(", held at:\n");
2526
2527 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
2528
2529 if (removed) {
2530 mdb_printf("removed at:\n");
2531 (void) mdb_call_dcmd("whatis", ref.ref_removed,
2532 DCMD_ADDRSPEC, 0, NULL);
2533 }
2534
2535 mdb_printf("\n");
2536
2537 return (WALK_NEXT);
2538 }
2539
2540 typedef struct mdb_refcount {
2541 uint64_t rc_count;
2542 } mdb_refcount_t;
2543
2544 typedef struct mdb_refcount_removed {
2545 uint64_t rc_removed_count;
2546 } mdb_refcount_removed_t;
2547
2548 typedef struct mdb_refcount_tracked {
2549 boolean_t rc_tracked;
2550 } mdb_refcount_tracked_t;
2551
2552 /* ARGSUSED */
2553 static int
2554 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2555 {
2556 mdb_refcount_t rc;
2557 mdb_refcount_removed_t rcr;
2558 mdb_refcount_tracked_t rct;
2559 int off;
2560 boolean_t released = B_FALSE;
2561
2562 if (!(flags & DCMD_ADDRSPEC))
2563 return (DCMD_USAGE);
2564
2565 if (mdb_getopts(argc, argv,
2566 'r', MDB_OPT_SETBITS, B_TRUE, &released,
2567 NULL) != argc)
2568 return (DCMD_USAGE);
2569
2570 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr,
2571 0) == -1)
2572 return (DCMD_ERR);
2573
2574 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr,
2575 MDB_CTF_VREAD_QUIET) == -1) {
2576 mdb_printf("refcount_t at %p has %llu holds (untracked)\n",
2577 addr, (longlong_t)rc.rc_count);
2578 return (DCMD_OK);
2579 }
2580
2581 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr,
2582 MDB_CTF_VREAD_QUIET) == -1) {
2583 /* If this is an old target, it might be tracked. */
2584 rct.rc_tracked = B_TRUE;
2585 }
2586
2587 mdb_printf("refcount_t at %p has %llu current holds, "
2588 "%llu recently released holds\n",
2589 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count);
2590
2591 if (rct.rc_tracked && rc.rc_count > 0)
2592 mdb_printf("current holds:\n");
2593 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list");
2594 if (off == -1)
2595 return (DCMD_ERR);
2596 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off);
2597
2598 if (released && rcr.rc_removed_count > 0) {
2599 mdb_printf("released holds:\n");
2600
2601 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed");
2602 if (off == -1)
2603 return (DCMD_ERR);
2604 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off);
2605 }
2606
2607 return (DCMD_OK);
2608 }
2609
2610 /* ARGSUSED */
2611 static int
2612 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2613 {
2614 sa_attr_table_t *table;
2615 sa_os_t sa_os;
2616 char *name;
2617 int i;
2618
2619 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) {
2620 mdb_warn("failed to read sa_os at %p", addr);
2621 return (DCMD_ERR);
2622 }
2623
2624 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2625 UM_SLEEP | UM_GC);
2626 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC);
2627
2628 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2629 (uintptr_t)sa_os.sa_attr_table) == -1) {
2630 mdb_warn("failed to read sa_os at %p", addr);
2631 return (DCMD_ERR);
2632 }
2633
2634 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n",
2635 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME");
2636 for (i = 0; i != sa_os.sa_num_attrs; i++) {
2637 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name);
2638 mdb_printf("%5x %8x %8x %8x %-s\n",
2639 (int)table[i].sa_attr, (int)table[i].sa_registered,
2640 (int)table[i].sa_length, table[i].sa_byteswap, name);
2641 }
2642
2643 return (DCMD_OK);
2644 }
2645
2646 static int
2647 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count)
2648 {
2649 uintptr_t idx_table;
2650
2651 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) {
2652 mdb_printf("can't find offset table in sa_idx_tab\n");
2653 return (-1);
2654 }
2655
2656 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t),
2657 UM_SLEEP | UM_GC);
2658
2659 if (mdb_vread(*off_tab,
2660 attr_count * sizeof (uint32_t), idx_table) == -1) {
2661 mdb_warn("failed to attribute offset table %p", idx_table);
2662 return (-1);
2663 }
2664
2665 return (DCMD_OK);
2666 }
2667
2668 /*ARGSUSED*/
2669 static int
2670 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2671 {
2672 uint32_t *offset_tab;
2673 int attr_count;
2674 uint64_t attr_id;
2675 uintptr_t attr_addr;
2676 uintptr_t bonus_tab, spill_tab;
2677 uintptr_t db_bonus, db_spill;
2678 uintptr_t os, os_sa;
2679 uintptr_t db_data;
2680
2681 if (argc != 1)
2682 return (DCMD_USAGE);
2683
2684 if (argv[0].a_type == MDB_TYPE_STRING)
2685 attr_id = mdb_strtoull(argv[0].a_un.a_str);
2686 else
2687 return (DCMD_USAGE);
2688
2689 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) ||
2690 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) ||
2691 GETMEMB(addr, "sa_handle", sa_os, os) ||
2692 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) ||
2693 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) {
2694 mdb_printf("Can't find necessary information in sa_handle "
2695 "in sa_handle\n");
2696 return (DCMD_ERR);
2697 }
2698
2699 if (GETMEMB(os, "objset", os_sa, os_sa)) {
2700 mdb_printf("Can't find os_sa in objset\n");
2701 return (DCMD_ERR);
2702 }
2703
2704 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) {
2705 mdb_printf("Can't find sa_num_attrs\n");
2706 return (DCMD_ERR);
2707 }
2708
2709 if (attr_id > attr_count) {
2710 mdb_printf("attribute id number is out of range\n");
2711 return (DCMD_ERR);
2712 }
2713
2714 if (bonus_tab) {
2715 if (sa_get_off_table(bonus_tab, &offset_tab,
2716 attr_count) == -1) {
2717 return (DCMD_ERR);
2718 }
2719
2720 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) {
2721 mdb_printf("can't find db_data in bonus dbuf\n");
2722 return (DCMD_ERR);
2723 }
2724 }
2725
2726 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) &&
2727 spill_tab == NULL) {
2728 mdb_printf("Attribute does not exist\n");
2729 return (DCMD_ERR);
2730 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) {
2731 if (sa_get_off_table(spill_tab, &offset_tab,
2732 attr_count) == -1) {
2733 return (DCMD_ERR);
2734 }
2735 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) {
2736 mdb_printf("can't find db_data in spill dbuf\n");
2737 return (DCMD_ERR);
2738 }
2739 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) {
2740 mdb_printf("Attribute does not exist\n");
2741 return (DCMD_ERR);
2742 }
2743 }
2744 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]);
2745 mdb_printf("%p\n", attr_addr);
2746 return (DCMD_OK);
2747 }
2748
2749 /* ARGSUSED */
2750 static int
2751 zfs_ace_print_common(uintptr_t addr, uint_t flags,
2752 uint64_t id, uint32_t access_mask, uint16_t ace_flags,
2753 uint16_t ace_type, int verbose)
2754 {
2755 if (DCMD_HDRSPEC(flags) && !verbose)
2756 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n",
2757 "ADDR", "FLAGS", "MASK", "TYPE", "ID");
2758
2759 if (!verbose) {
2760 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr,
2761 ace_flags, access_mask, ace_type, id);
2762 return (DCMD_OK);
2763 }
2764
2765 switch (ace_flags & ACE_TYPE_FLAGS) {
2766 case ACE_OWNER:
2767 mdb_printf("owner@:");
2768 break;
2769 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
2770 mdb_printf("group@:");
2771 break;
2772 case ACE_EVERYONE:
2773 mdb_printf("everyone@:");
2774 break;
2775 case ACE_IDENTIFIER_GROUP:
2776 mdb_printf("group:%llx:", (u_longlong_t)id);
2777 break;
2778 case 0: /* User entry */
2779 mdb_printf("user:%llx:", (u_longlong_t)id);
2780 break;
2781 }
2782
2783 /* print out permission mask */
2784 if (access_mask & ACE_READ_DATA)
2785 mdb_printf("r");
2786 else
2787 mdb_printf("-");
2788 if (access_mask & ACE_WRITE_DATA)
2789 mdb_printf("w");
2790 else
2791 mdb_printf("-");
2792 if (access_mask & ACE_EXECUTE)
2793 mdb_printf("x");
2794 else
2795 mdb_printf("-");
2796 if (access_mask & ACE_APPEND_DATA)
2797 mdb_printf("p");
2798 else
2799 mdb_printf("-");
2800 if (access_mask & ACE_DELETE)
2801 mdb_printf("d");
2802 else
2803 mdb_printf("-");
2804 if (access_mask & ACE_DELETE_CHILD)
2805 mdb_printf("D");
2806 else
2807 mdb_printf("-");
2808 if (access_mask & ACE_READ_ATTRIBUTES)
2809 mdb_printf("a");
2810 else
2811 mdb_printf("-");
2812 if (access_mask & ACE_WRITE_ATTRIBUTES)
2813 mdb_printf("A");
2814 else
2815 mdb_printf("-");
2816 if (access_mask & ACE_READ_NAMED_ATTRS)
2817 mdb_printf("R");
2818 else
2819 mdb_printf("-");
2820 if (access_mask & ACE_WRITE_NAMED_ATTRS)
2821 mdb_printf("W");
2822 else
2823 mdb_printf("-");
2824 if (access_mask & ACE_READ_ACL)
2825 mdb_printf("c");
2826 else
2827 mdb_printf("-");
2828 if (access_mask & ACE_WRITE_ACL)
2829 mdb_printf("C");
2830 else
2831 mdb_printf("-");
2832 if (access_mask & ACE_WRITE_OWNER)
2833 mdb_printf("o");
2834 else
2835 mdb_printf("-");
2836 if (access_mask & ACE_SYNCHRONIZE)
2837 mdb_printf("s");
2838 else
2839 mdb_printf("-");
2840
2841 mdb_printf(":");
2842
2843 /* Print out inheritance flags */
2844 if (ace_flags & ACE_FILE_INHERIT_ACE)
2845 mdb_printf("f");
2846 else
2847 mdb_printf("-");
2848 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE)
2849 mdb_printf("d");
2850 else
2851 mdb_printf("-");
2852 if (ace_flags & ACE_INHERIT_ONLY_ACE)
2853 mdb_printf("i");
2854 else
2855 mdb_printf("-");
2856 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE)
2857 mdb_printf("n");
2858 else
2859 mdb_printf("-");
2860 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)
2861 mdb_printf("S");
2862 else
2863 mdb_printf("-");
2864 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG)
2865 mdb_printf("F");
2866 else
2867 mdb_printf("-");
2868 if (ace_flags & ACE_INHERITED_ACE)
2869 mdb_printf("I");
2870 else
2871 mdb_printf("-");
2872
2873 switch (ace_type) {
2874 case ACE_ACCESS_ALLOWED_ACE_TYPE:
2875 mdb_printf(":allow\n");
2876 break;
2877 case ACE_ACCESS_DENIED_ACE_TYPE:
2878 mdb_printf(":deny\n");
2879 break;
2880 case ACE_SYSTEM_AUDIT_ACE_TYPE:
2881 mdb_printf(":audit\n");
2882 break;
2883 case ACE_SYSTEM_ALARM_ACE_TYPE:
2884 mdb_printf(":alarm\n");
2885 break;
2886 default:
2887 mdb_printf(":?\n");
2888 }
2889 return (DCMD_OK);
2890 }
2891
2892 /* ARGSUSED */
2893 static int
2894 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2895 {
2896 zfs_ace_t zace;
2897 int verbose = FALSE;
2898 uint64_t id;
2899
2900 if (!(flags & DCMD_ADDRSPEC))
2901 return (DCMD_USAGE);
2902
2903 if (mdb_getopts(argc, argv,
2904 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2905 return (DCMD_USAGE);
2906
2907 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) {
2908 mdb_warn("failed to read zfs_ace_t");
2909 return (DCMD_ERR);
2910 }
2911
2912 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 ||
2913 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2914 id = zace.z_fuid;
2915 else
2916 id = -1;
2917
2918 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask,
2919 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose));
2920 }
2921
2922 /* ARGSUSED */
2923 static int
2924 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2925 {
2926 ace_t ace;
2927 uint64_t id;
2928 int verbose = FALSE;
2929
2930 if (!(flags & DCMD_ADDRSPEC))
2931 return (DCMD_USAGE);
2932
2933 if (mdb_getopts(argc, argv,
2934 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2935 return (DCMD_USAGE);
2936
2937 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) {
2938 mdb_warn("failed to read ace_t");
2939 return (DCMD_ERR);
2940 }
2941
2942 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 ||
2943 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2944 id = ace.a_who;
2945 else
2946 id = -1;
2947
2948 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask,
2949 ace.a_flags, ace.a_type, verbose));
2950 }
2951
2952 typedef struct acl_dump_args {
2953 int a_argc;
2954 const mdb_arg_t *a_argv;
2955 uint16_t a_version;
2956 int a_flags;
2957 } acl_dump_args_t;
2958
2959 /* ARGSUSED */
2960 static int
2961 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg)
2962 {
2963 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2964
2965 if (acl_args->a_version == 1) {
2966 if (mdb_call_dcmd("zfs_ace", addr,
2967 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2968 acl_args->a_argv) != DCMD_OK) {
2969 return (WALK_ERR);
2970 }
2971 } else {
2972 if (mdb_call_dcmd("zfs_ace0", addr,
2973 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2974 acl_args->a_argv) != DCMD_OK) {
2975 return (WALK_ERR);
2976 }
2977 }
2978 acl_args->a_flags = DCMD_LOOP;
2979 return (WALK_NEXT);
2980 }
2981
2982 /* ARGSUSED */
2983 static int
2984 acl_cb(uintptr_t addr, const void *unknown, void *arg)
2985 {
2986 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2987
2988 if (acl_args->a_version == 1) {
2989 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb,
2990 arg, addr) != 0) {
2991 mdb_warn("can't walk ACEs");
2992 return (DCMD_ERR);
2993 }
2994 } else {
2995 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb,
2996 arg, addr) != 0) {
2997 mdb_warn("can't walk ACEs");
2998 return (DCMD_ERR);
2999 }
3000 }
3001 return (WALK_NEXT);
3002 }
3003
3004 /* ARGSUSED */
3005 static int
3006 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3007 {
3008 zfs_acl_t zacl;
3009 int verbose = FALSE;
3010 acl_dump_args_t acl_args;
3011
3012 if (!(flags & DCMD_ADDRSPEC))
3013 return (DCMD_USAGE);
3014
3015 if (mdb_getopts(argc, argv,
3016 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3017 return (DCMD_USAGE);
3018
3019 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) {
3020 mdb_warn("failed to read zfs_acl_t");
3021 return (DCMD_ERR);
3022 }
3023
3024 acl_args.a_argc = argc;
3025 acl_args.a_argv = argv;
3026 acl_args.a_version = zacl.z_version;
3027 acl_args.a_flags = DCMD_LOOPFIRST;
3028
3029 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) {
3030 mdb_warn("can't walk ACL");
3031 return (DCMD_ERR);
3032 }
3033
3034 return (DCMD_OK);
3035 }
3036
3037 /* ARGSUSED */
3038 static int
3039 zfs_acl_node_walk_init(mdb_walk_state_t *wsp)
3040 {
3041 if (wsp->walk_addr == NULL) {
3042 mdb_warn("must supply address of zfs_acl_node_t\n");
3043 return (WALK_ERR);
3044 }
3045
3046 wsp->walk_addr +=
3047 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl");
3048
3049 if (mdb_layered_walk("list", wsp) == -1) {
3050 mdb_warn("failed to walk 'list'\n");
3051 return (WALK_ERR);
3052 }
3053
3054 return (WALK_NEXT);
3055 }
3056
3057 static int
3058 zfs_acl_node_walk_step(mdb_walk_state_t *wsp)
3059 {
3060 zfs_acl_node_t aclnode;
3061
3062 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t),
3063 wsp->walk_addr) == -1) {
3064 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr);
3065 return (WALK_ERR);
3066 }
3067
3068 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata));
3069 }
3070
3071 typedef struct ace_walk_data {
3072 int ace_count;
3073 int ace_version;
3074 } ace_walk_data_t;
3075
3076 static int
3077 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version,
3078 int ace_count, uintptr_t ace_data)
3079 {
3080 ace_walk_data_t *ace_walk_data;
3081
3082 if (wsp->walk_addr == NULL) {
3083 mdb_warn("must supply address of zfs_acl_node_t\n");
3084 return (WALK_ERR);
3085 }
3086
3087 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC);
3088
3089 ace_walk_data->ace_count = ace_count;
3090 ace_walk_data->ace_version = version;
3091
3092 wsp->walk_addr = ace_data;
3093 wsp->walk_data = ace_walk_data;
3094
3095 return (WALK_NEXT);
3096 }
3097
3098 static int
3099 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version)
3100 {
3101 static int gotid;
3102 static mdb_ctf_id_t acl_id;
3103 int z_ace_count;
3104 uintptr_t z_acldata;
3105
3106 if (!gotid) {
3107 if (mdb_ctf_lookup_by_name("struct zfs_acl_node",
3108 &acl_id) == -1) {
3109 mdb_warn("couldn't find struct zfs_acl_node");
3110 return (DCMD_ERR);
3111 }
3112 gotid = TRUE;
3113 }
3114
3115 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) {
3116 return (DCMD_ERR);
3117 }
3118 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) {
3119 return (DCMD_ERR);
3120 }
3121
3122 return (zfs_aces_walk_init_common(wsp, version,
3123 z_ace_count, z_acldata));
3124 }
3125
3126 /* ARGSUSED */
3127 static int
3128 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp)
3129 {
3130 return (zfs_acl_node_aces_walk_init_common(wsp, 1));
3131 }
3132
3133 /* ARGSUSED */
3134 static int
3135 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp)
3136 {
3137 return (zfs_acl_node_aces_walk_init_common(wsp, 0));
3138 }
3139
3140 static int
3141 zfs_aces_walk_step(mdb_walk_state_t *wsp)
3142 {
3143 ace_walk_data_t *ace_data = wsp->walk_data;
3144 zfs_ace_t zace;
3145 ace_t *acep;
3146 int status;
3147 int entry_type;
3148 int allow_type;
3149 uintptr_t ptr;
3150
3151 if (ace_data->ace_count == 0)
3152 return (WALK_DONE);
3153
3154 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) {
3155 mdb_warn("failed to read zfs_ace_t at %#lx",
3156 wsp->walk_addr);
3157 return (WALK_ERR);
3158 }
3159
3160 switch (ace_data->ace_version) {
3161 case 0:
3162 acep = (ace_t *)&zace;
3163 entry_type = acep->a_flags & ACE_TYPE_FLAGS;
3164 allow_type = acep->a_type;
3165 break;
3166 case 1:
3167 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS;
3168 allow_type = zace.z_hdr.z_type;
3169 break;
3170 default:
3171 return (WALK_ERR);
3172 }
3173
3174 ptr = (uintptr_t)wsp->walk_addr;
3175 switch (entry_type) {
3176 case ACE_OWNER:
3177 case ACE_EVERYONE:
3178 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
3179 ptr += ace_data->ace_version == 0 ?
3180 sizeof (ace_t) : sizeof (zfs_ace_hdr_t);
3181 break;
3182 case ACE_IDENTIFIER_GROUP:
3183 default:
3184 switch (allow_type) {
3185 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
3186 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
3187 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
3188 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
3189 ptr += ace_data->ace_version == 0 ?
3190 sizeof (ace_t) : sizeof (zfs_object_ace_t);
3191 break;
3192 default:
3193 ptr += ace_data->ace_version == 0 ?
3194 sizeof (ace_t) : sizeof (zfs_ace_t);
3195 break;
3196 }
3197 }
3198
3199 ace_data->ace_count--;
3200 status = wsp->walk_callback(wsp->walk_addr,
3201 (void *)(uintptr_t)&zace, wsp->walk_cbdata);
3202
3203 wsp->walk_addr = ptr;
3204 return (status);
3205 }
3206
3207 typedef struct mdb_zfs_rrwlock {
3208 uintptr_t rr_writer;
3209 boolean_t rr_writer_wanted;
3210 } mdb_zfs_rrwlock_t;
3211
3212 static uint_t rrw_key;
3213
3214 /* ARGSUSED */
3215 static int
3216 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3217 {
3218 mdb_zfs_rrwlock_t rrw;
3219
3220 if (rrw_key == 0) {
3221 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1)
3222 return (DCMD_ERR);
3223 }
3224
3225 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr,
3226 0) == -1)
3227 return (DCMD_ERR);
3228
3229 if (rrw.rr_writer != 0) {
3230 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer);
3231 return (DCMD_OK);
3232 }
3233
3234 if (rrw.rr_writer_wanted) {
3235 mdb_printf("writer wanted\n");
3236 }
3237
3238 mdb_printf("anonymous references:\n");
3239 (void) mdb_call_dcmd("refcount", addr +
3240 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"),
3241 DCMD_ADDRSPEC, 0, NULL);
3242
3243 mdb_printf("linked references:\n");
3244 (void) mdb_call_dcmd("refcount", addr +
3245 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"),
3246 DCMD_ADDRSPEC, 0, NULL);
3247
3248 /*
3249 * XXX This should find references from
3250 * "::walk thread | ::tsd -v <rrw_key>", but there is no support
3251 * for programmatic consumption of dcmds, so this would be
3252 * difficult, potentially requiring reimplementing ::tsd (both
3253 * user and kernel versions) in this MDB module.
3254 */
3255
3256 return (DCMD_OK);
3257 }
3258
3259 /*
3260 * MDB module linkage information:
3261 *
3262 * We declare a list of structures describing our dcmds, and a function
3263 * named _mdb_init to return a pointer to our module information.
3264 */
3265
3266 static const mdb_dcmd_t dcmds[] = {
3267 { "arc", "[-bkmg]", "print ARC variables", arc_print },
3268 { "blkptr", ":", "print blkptr_t", blkptr },
3269 { "dbuf", ":", "print dmu_buf_impl_t", dbuf },
3270 { "dbuf_stats", ":", "dbuf stats", dbuf_stats },
3271 { "dbufs",
3272 "\t[-O objset_t*] [-n objset_name | \"mos\"] "
3273 "[-o object | \"mdn\"] \n"
3274 "\t[-l level] [-b blkid | \"bonus\"]",
3275 "find dmu_buf_impl_t's that match specified criteria", dbufs },
3276 { "abuf_find", "dva_word[0] dva_word[1]",
3277 "find arc_buf_hdr_t of a specified DVA",
3278 abuf_find },
3279 { "spa", "?[-cevmMh]\n"
3280 "\t-c display spa config\n"
3281 "\t-e display vdev statistics\n"
3282 "\t-v display vdev information\n"
3283 "\t-m display metaslab statistics\n"
3284 "\t-M display metaslab group statistics\n"
3285 "\t-h display histogram (requires -m or -M)\n",
3286 "spa_t summary", spa_print },
3287 { "spa_config", ":", "print spa_t configuration", spa_print_config },
3288 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space },
3289 { "spa_vdevs", ":[-emMh]\n"
3290 "\t-e display vdev statistics\n"
3291 "\t-m dispaly metaslab statistics\n"
3292 "\t-M display metaslab group statistic\n"
3293 "\t-h display histogram (requires -m or -M)\n",
3294 "given a spa_t, print vdev summary", spa_vdevs },
3295 { "vdev", ":[-re]\n"
3296 "\t-r display recursively\n"
3297 "\t-e display statistics\n"
3298 "\t-m display metaslab statistics\n"
3299 "\t-M display metaslab group statistics\n"
3300 "\t-h display histogram (requires -m or -M)\n",
3301 "vdev_t summary", vdev_print },
3302 { "zio", ":[-cpr]\n"
3303 "\t-c display children\n"
3304 "\t-p display parents\n"
3305 "\t-r display recursively",
3306 "zio_t summary", zio_print },
3307 { "zio_state", "?", "print out all zio_t structures on system or "
3308 "for a particular pool", zio_state },
3309 { "zfs_blkstats", ":[-v]",
3310 "given a spa_t, print block type stats from last scrub",
3311 zfs_blkstats },
3312 { "zfs_params", "", "print zfs tunable parameters", zfs_params },
3313 { "refcount", ":[-r]\n"
3314 "\t-r display recently removed references",
3315 "print refcount_t holders", refcount },
3316 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf },
3317 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t",
3318 zfs_acl_dump },
3319 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print },
3320 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print },
3321 { "sa_attr_table", ":", "print SA attribute table from sa_os_t",
3322 sa_attr_table},
3323 { "sa_attr", ": attr_id",
3324 "print SA attribute address when given sa_handle_t", sa_attr_print},
3325 { "zfs_dbgmsg", ":[-va]",
3326 "print zfs debug log", dbgmsg},
3327 { "rrwlock", ":",
3328 "print rrwlock_t, including readers", rrwlock},
3329 { NULL }
3330 };
3331
3332 static const mdb_walker_t walkers[] = {
3333 { "zms_freelist", "walk ZFS metaslab freelist",
3334 freelist_walk_init, freelist_walk_step, NULL },
3335 { "txg_list", "given any txg_list_t *, walk all entries in all txgs",
3336 txg_list_walk_init, txg_list_walk_step, NULL },
3337 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0",
3338 txg_list0_walk_init, txg_list_walk_step, NULL },
3339 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1",
3340 txg_list1_walk_init, txg_list_walk_step, NULL },
3341 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2",
3342 txg_list2_walk_init, txg_list_walk_step, NULL },
3343 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3",
3344 txg_list3_walk_init, txg_list_walk_step, NULL },
3345 { "zio", "walk all zio structures, optionally for a particular spa_t",
3346 zio_walk_init, zio_walk_step, NULL },
3347 { "zio_root",
3348 "walk all root zio_t structures, optionally for a particular spa_t",
3349 zio_walk_init, zio_walk_root_step, NULL },
3350 { "spa", "walk all spa_t entries in the namespace",
3351 spa_walk_init, spa_walk_step, NULL },
3352 { "metaslab", "given a spa_t *, walk all metaslab_t structures",
3353 metaslab_walk_init, metaslab_walk_step, NULL },
3354 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes",
3355 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL },
3356 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs",
3357 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL },
3358 { "zfs_acl_node_aces0",
3359 "given a zfs_acl_node_t, walk all ACEs as ace_t",
3360 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL },
3361 { NULL }
3362 };
3363
3364 static const mdb_modinfo_t modinfo = {
3365 MDB_API_VERSION, dcmds, walkers
3366 };
3367
3368 const mdb_modinfo_t *
3369 _mdb_init(void)
3370 {
3371 return (&modinfo);
3372 }
Unleashed OS