1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2011, 2015 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
getmember(uintptr_t addr,const char * type,mdb_ctf_id_t * idp,const char * member,int len,void * buf)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
strisprint(const char * cp)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
snprintfrac(char * buf,int len,uint64_t numerator,uint64_t denom,int frac_digits)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
mdb_nicenum(uint64_t num,char * buf)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
freelist_walk_init(mdb_walk_state_t * wsp)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
freelist_walk_step(mdb_walk_state_t * wsp)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
mdb_dsl_dir_name(uintptr_t addr,char * buf)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[ZFS_MAX_DATASET_NAME_LEN];
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
objset_name(uintptr_t addr,char * buf)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[ZFS_MAX_DATASET_NAME_LEN];
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
enum_lookup(char * out,size_t size,mdb_ctf_id_t id,int val,const char * prefix)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
zfs_params(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)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
blkptr(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)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 uintptr_t db_data;
453 } db;
454 uintptr_t db_objset;
455 uint64_t db_level;
456 uint64_t db_blkid;
457 struct {
458 uint64_t rc_count;
459 } db_holds;
460 } mdb_dmu_buf_impl_t;
461
462 /* ARGSUSED */
463 static int
dbuf(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)464 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
465 {
466 mdb_dmu_buf_impl_t db;
467 char objectname[32];
468 char blkidname[32];
469 char path[ZFS_MAX_DATASET_NAME_LEN];
470
471 if (DCMD_HDRSPEC(flags))
472 mdb_printf(" addr object lvl blkid holds os\n");
473
474 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
475 addr, 0) == -1)
476 return (DCMD_ERR);
477
478 if (db.db.db_object == DMU_META_DNODE_OBJECT)
479 (void) strcpy(objectname, "mdn");
480 else
481 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx",
482 (u_longlong_t)db.db.db_object);
483
484 if (db.db_blkid == DMU_BONUS_BLKID)
485 (void) strcpy(blkidname, "bonus");
486 else
487 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx",
488 (u_longlong_t)db.db_blkid);
489
490 if (objset_name(db.db_objset, path)) {
491 return (DCMD_ERR);
492 }
493
494 mdb_printf("%p %8s %1u %9s %2llu %s\n", addr,
495 objectname, (int)db.db_level, blkidname,
496 db.db_holds.rc_count, path);
497
498 return (DCMD_OK);
499 }
500
501 /* ARGSUSED */
502 static int
dbuf_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)503 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
504 {
505 #define HISTOSZ 32
506 uintptr_t dbp;
507 dmu_buf_impl_t db;
508 dbuf_hash_table_t ht;
509 uint64_t bucket, ndbufs;
510 uint64_t histo[HISTOSZ];
511 uint64_t histo2[HISTOSZ];
512 int i, maxidx;
513
514 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) {
515 mdb_warn("failed to read 'dbuf_hash_table'");
516 return (DCMD_ERR);
517 }
518
519 for (i = 0; i < HISTOSZ; i++) {
520 histo[i] = 0;
521 histo2[i] = 0;
522 }
523
524 ndbufs = 0;
525 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) {
526 int len;
527
528 if (mdb_vread(&dbp, sizeof (void *),
529 (uintptr_t)(ht.hash_table+bucket)) == -1) {
530 mdb_warn("failed to read hash bucket %u at %p",
531 bucket, ht.hash_table+bucket);
532 return (DCMD_ERR);
533 }
534
535 len = 0;
536 while (dbp != 0) {
537 if (mdb_vread(&db, sizeof (dmu_buf_impl_t),
538 dbp) == -1) {
539 mdb_warn("failed to read dbuf at %p", dbp);
540 return (DCMD_ERR);
541 }
542 dbp = (uintptr_t)db.db_hash_next;
543 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--)
544 histo2[i]++;
545 len++;
546 ndbufs++;
547 }
548
549 if (len >= HISTOSZ)
550 len = HISTOSZ-1;
551 histo[len]++;
552 }
553
554 mdb_printf("hash table has %llu buckets, %llu dbufs "
555 "(avg %llu buckets/dbuf)\n",
556 ht.hash_table_mask+1, ndbufs,
557 (ht.hash_table_mask+1)/ndbufs);
558
559 mdb_printf("\n");
560 maxidx = 0;
561 for (i = 0; i < HISTOSZ; i++)
562 if (histo[i] > 0)
563 maxidx = i;
564 mdb_printf("hash chain length number of buckets\n");
565 for (i = 0; i <= maxidx; i++)
566 mdb_printf("%u %llu\n", i, histo[i]);
567
568 mdb_printf("\n");
569 maxidx = 0;
570 for (i = 0; i < HISTOSZ; i++)
571 if (histo2[i] > 0)
572 maxidx = i;
573 mdb_printf("hash chain depth number of dbufs\n");
574 for (i = 0; i <= maxidx; i++)
575 mdb_printf("%u or more %llu %llu%%\n",
576 i, histo2[i], histo2[i]*100/ndbufs);
577
578
579 return (DCMD_OK);
580 }
581
582 #define CHAIN_END 0xffff
583 /*
584 * ::zap_leaf [-v]
585 *
586 * Print a zap_leaf_phys_t, assumed to be 16k
587 */
588 /* ARGSUSED */
589 static int
zap_leaf(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)590 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
591 {
592 char buf[16*1024];
593 int verbose = B_FALSE;
594 int four = B_FALSE;
595 dmu_buf_t l_dbuf;
596 zap_leaf_t l;
597 zap_leaf_phys_t *zlp = (void *)buf;
598 int i;
599
600 if (mdb_getopts(argc, argv,
601 'v', MDB_OPT_SETBITS, TRUE, &verbose,
602 '4', MDB_OPT_SETBITS, TRUE, &four,
603 NULL) != argc)
604 return (DCMD_USAGE);
605
606 l_dbuf.db_data = zlp;
607 l.l_dbuf = &l_dbuf;
608 l.l_bs = 14; /* assume 16k blocks */
609 if (four)
610 l.l_bs = 12;
611
612 if (!(flags & DCMD_ADDRSPEC)) {
613 return (DCMD_USAGE);
614 }
615
616 if (mdb_vread(buf, sizeof (buf), addr) == -1) {
617 mdb_warn("failed to read zap_leaf_phys_t at %p", addr);
618 return (DCMD_ERR);
619 }
620
621 if (zlp->l_hdr.lh_block_type != ZBT_LEAF ||
622 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) {
623 mdb_warn("This does not appear to be a zap_leaf_phys_t");
624 return (DCMD_ERR);
625 }
626
627 mdb_printf("zap_leaf_phys_t at %p:\n", addr);
628 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len);
629 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix);
630 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries);
631 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree,
632 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l)));
633 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist);
634 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags,
635 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ?
636 "ENTRIES_CDSORTED" : "");
637
638 if (verbose) {
639 mdb_printf(" hash table:\n");
640 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) {
641 if (zlp->l_hash[i] != CHAIN_END)
642 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]);
643 }
644 }
645
646 mdb_printf(" chunks:\n");
647 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) {
648 /* LINTED: alignment */
649 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i);
650 switch (zlc->l_entry.le_type) {
651 case ZAP_CHUNK_FREE:
652 if (verbose) {
653 mdb_printf(" %u: free; lf_next = %u\n",
654 i, zlc->l_free.lf_next);
655 }
656 break;
657 case ZAP_CHUNK_ENTRY:
658 mdb_printf(" %u: entry\n", i);
659 if (verbose) {
660 mdb_printf(" le_next = %u\n",
661 zlc->l_entry.le_next);
662 }
663 mdb_printf(" le_name_chunk = %u\n",
664 zlc->l_entry.le_name_chunk);
665 mdb_printf(" le_name_numints = %u\n",
666 zlc->l_entry.le_name_numints);
667 mdb_printf(" le_value_chunk = %u\n",
668 zlc->l_entry.le_value_chunk);
669 mdb_printf(" le_value_intlen = %u\n",
670 zlc->l_entry.le_value_intlen);
671 mdb_printf(" le_value_numints = %u\n",
672 zlc->l_entry.le_value_numints);
673 mdb_printf(" le_cd = %u\n",
674 zlc->l_entry.le_cd);
675 mdb_printf(" le_hash = %llx\n",
676 zlc->l_entry.le_hash);
677 break;
678 case ZAP_CHUNK_ARRAY:
679 mdb_printf(" %u: array", i);
680 if (strisprint((char *)zlc->l_array.la_array))
681 mdb_printf(" \"%s\"", zlc->l_array.la_array);
682 mdb_printf("\n");
683 if (verbose) {
684 int j;
685 mdb_printf(" ");
686 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) {
687 mdb_printf("%02x ",
688 zlc->l_array.la_array[j]);
689 }
690 mdb_printf("\n");
691 }
692 if (zlc->l_array.la_next != CHAIN_END) {
693 mdb_printf(" lf_next = %u\n",
694 zlc->l_array.la_next);
695 }
696 break;
697 default:
698 mdb_printf(" %u: undefined type %u\n",
699 zlc->l_entry.le_type);
700 }
701 }
702
703 return (DCMD_OK);
704 }
705
706 typedef struct dbufs_data {
707 mdb_ctf_id_t id;
708 uint64_t objset;
709 uint64_t object;
710 uint64_t level;
711 uint64_t blkid;
712 char *osname;
713 } dbufs_data_t;
714
715 #define DBUFS_UNSET (0xbaddcafedeadbeefULL)
716
717 /* ARGSUSED */
718 static int
dbufs_cb(uintptr_t addr,const void * unknown,void * arg)719 dbufs_cb(uintptr_t addr, const void *unknown, void *arg)
720 {
721 dbufs_data_t *data = arg;
722 uintptr_t objset;
723 dmu_buf_t db;
724 uint8_t level;
725 uint64_t blkid;
726 char osname[ZFS_MAX_DATASET_NAME_LEN];
727
728 if (GETMEMBID(addr, &data->id, db_objset, objset) ||
729 GETMEMBID(addr, &data->id, db, db) ||
730 GETMEMBID(addr, &data->id, db_level, level) ||
731 GETMEMBID(addr, &data->id, db_blkid, blkid)) {
732 return (WALK_ERR);
733 }
734
735 if ((data->objset == DBUFS_UNSET || data->objset == objset) &&
736 (data->osname == NULL || (objset_name(objset, osname) == 0 &&
737 strcmp(data->osname, osname) == 0)) &&
738 (data->object == DBUFS_UNSET || data->object == db.db_object) &&
739 (data->level == DBUFS_UNSET || data->level == level) &&
740 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) {
741 mdb_printf("%#lr\n", addr);
742 }
743 return (WALK_NEXT);
744 }
745
746 /* ARGSUSED */
747 static int
dbufs(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)748 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
749 {
750 dbufs_data_t data;
751 char *object = NULL;
752 char *blkid = NULL;
753
754 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET;
755 data.osname = NULL;
756
757 if (mdb_getopts(argc, argv,
758 'O', MDB_OPT_UINT64, &data.objset,
759 'n', MDB_OPT_STR, &data.osname,
760 'o', MDB_OPT_STR, &object,
761 'l', MDB_OPT_UINT64, &data.level,
762 'b', MDB_OPT_STR, &blkid) != argc) {
763 return (DCMD_USAGE);
764 }
765
766 if (object) {
767 if (strcmp(object, "mdn") == 0) {
768 data.object = DMU_META_DNODE_OBJECT;
769 } else {
770 data.object = mdb_strtoull(object);
771 }
772 }
773
774 if (blkid) {
775 if (strcmp(blkid, "bonus") == 0) {
776 data.blkid = DMU_BONUS_BLKID;
777 } else {
778 data.blkid = mdb_strtoull(blkid);
779 }
780 }
781
782 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) {
783 mdb_warn("couldn't find struct dmu_buf_impl_t");
784 return (DCMD_ERR);
785 }
786
787 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) {
788 mdb_warn("can't walk dbufs");
789 return (DCMD_ERR);
790 }
791
792 return (DCMD_OK);
793 }
794
795 typedef struct abuf_find_data {
796 dva_t dva;
797 mdb_ctf_id_t id;
798 } abuf_find_data_t;
799
800 /* ARGSUSED */
801 static int
abuf_find_cb(uintptr_t addr,const void * unknown,void * arg)802 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg)
803 {
804 abuf_find_data_t *data = arg;
805 dva_t dva;
806
807 if (GETMEMBID(addr, &data->id, b_dva, dva)) {
808 return (WALK_ERR);
809 }
810
811 if (dva.dva_word[0] == data->dva.dva_word[0] &&
812 dva.dva_word[1] == data->dva.dva_word[1]) {
813 mdb_printf("%#lr\n", addr);
814 }
815 return (WALK_NEXT);
816 }
817
818 /* ARGSUSED */
819 static int
abuf_find(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)820 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
821 {
822 abuf_find_data_t data;
823 GElf_Sym sym;
824 int i;
825 const char *syms[] = {
826 "ARC_mru",
827 "ARC_mru_ghost",
828 "ARC_mfu",
829 "ARC_mfu_ghost",
830 };
831
832 if (argc != 2)
833 return (DCMD_USAGE);
834
835 for (i = 0; i < 2; i ++) {
836 switch (argv[i].a_type) {
837 case MDB_TYPE_STRING:
838 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str);
839 break;
840 case MDB_TYPE_IMMEDIATE:
841 data.dva.dva_word[i] = argv[i].a_un.a_val;
842 break;
843 default:
844 return (DCMD_USAGE);
845 }
846 }
847
848 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) {
849 mdb_warn("couldn't find struct arc_buf_hdr");
850 return (DCMD_ERR);
851 }
852
853 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) {
854 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) {
855 mdb_warn("can't find symbol %s", syms[i]);
856 return (DCMD_ERR);
857 }
858
859 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) {
860 mdb_warn("can't walk %s", syms[i]);
861 return (DCMD_ERR);
862 }
863 }
864
865 return (DCMD_OK);
866 }
867
868
869 typedef struct dbgmsg_arg {
870 boolean_t da_verbose;
871 boolean_t da_address;
872 } dbgmsg_arg_t;
873
874 /* ARGSUSED */
875 static int
dbgmsg_cb(uintptr_t addr,const void * unknown,void * arg)876 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg)
877 {
878 static mdb_ctf_id_t id;
879 static boolean_t gotid;
880 static ulong_t off;
881
882 dbgmsg_arg_t *da = arg;
883 time_t timestamp;
884 char buf[1024];
885
886 if (!gotid) {
887 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) ==
888 -1) {
889 mdb_warn("couldn't find struct zfs_dbgmsg");
890 return (WALK_ERR);
891 }
892 gotid = TRUE;
893 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) {
894 mdb_warn("couldn't find zdm_msg");
895 return (WALK_ERR);
896 }
897 off /= 8;
898 }
899
900
901 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) {
902 return (WALK_ERR);
903 }
904
905 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) {
906 mdb_warn("failed to read zdm_msg at %p\n", addr + off);
907 return (DCMD_ERR);
908 }
909
910 if (da->da_address)
911 mdb_printf("%p ", addr);
912 if (da->da_verbose)
913 mdb_printf("%Y ", timestamp);
914
915 mdb_printf("%s\n", buf);
916
917 if (da->da_verbose)
918 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
919
920 return (WALK_NEXT);
921 }
922
923 /* ARGSUSED */
924 static int
dbgmsg(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)925 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
926 {
927 GElf_Sym sym;
928 dbgmsg_arg_t da = { 0 };
929
930 if (mdb_getopts(argc, argv,
931 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose,
932 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address,
933 NULL) != argc)
934 return (DCMD_USAGE);
935
936 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) {
937 mdb_warn("can't find zfs_dbgmsgs");
938 return (DCMD_ERR);
939 }
940
941 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) {
942 mdb_warn("can't walk zfs_dbgmsgs");
943 return (DCMD_ERR);
944 }
945
946 return (DCMD_OK);
947 }
948
949 /*ARGSUSED*/
950 static int
arc_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)951 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
952 {
953 kstat_named_t *stats;
954 GElf_Sym sym;
955 int nstats, i;
956 uint_t opt_a = FALSE;
957 uint_t opt_b = FALSE;
958 uint_t shift = 0;
959 const char *suffix;
960
961 static const char *bytestats[] = {
962 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size",
963 "arc_meta_used", "arc_meta_limit", "arc_meta_max",
964 "arc_meta_min", "hdr_size", "data_size", "metadata_size",
965 "other_size", "anon_size", "anon_evictable_data",
966 "anon_evictable_metadata", "mru_size", "mru_evictable_data",
967 "mru_evictable_metadata", "mru_ghost_size",
968 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata",
969 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata",
970 "mfu_ghost_size", "mfu_ghost_evictable_data",
971 "mfu_ghost_evictable_metadata", "evict_l2_cached",
972 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes",
973 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size",
974 NULL
975 };
976
977 static const char *extras[] = {
978 "arc_no_grow", "arc_tempreserve",
979 NULL
980 };
981
982 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) {
983 mdb_warn("failed to find 'arc_stats'");
984 return (DCMD_ERR);
985 }
986
987 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC);
988
989 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) {
990 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value);
991 return (DCMD_ERR);
992 }
993
994 nstats = sym.st_size / sizeof (kstat_named_t);
995
996 /* NB: -a / opt_a are ignored for backwards compatability */
997 if (mdb_getopts(argc, argv,
998 'a', MDB_OPT_SETBITS, TRUE, &opt_a,
999 'b', MDB_OPT_SETBITS, TRUE, &opt_b,
1000 'k', MDB_OPT_SETBITS, 10, &shift,
1001 'm', MDB_OPT_SETBITS, 20, &shift,
1002 'g', MDB_OPT_SETBITS, 30, &shift,
1003 NULL) != argc)
1004 return (DCMD_USAGE);
1005
1006 if (!opt_b && !shift)
1007 shift = 20;
1008
1009 switch (shift) {
1010 case 0:
1011 suffix = "B";
1012 break;
1013 case 10:
1014 suffix = "KB";
1015 break;
1016 case 20:
1017 suffix = "MB";
1018 break;
1019 case 30:
1020 suffix = "GB";
1021 break;
1022 default:
1023 suffix = "XX";
1024 }
1025
1026 for (i = 0; i < nstats; i++) {
1027 int j;
1028 boolean_t bytes = B_FALSE;
1029
1030 for (j = 0; bytestats[j]; j++) {
1031 if (strcmp(stats[i].name, bytestats[j]) == 0) {
1032 bytes = B_TRUE;
1033 break;
1034 }
1035 }
1036
1037 if (bytes) {
1038 mdb_printf("%-25s = %9llu %s\n", stats[i].name,
1039 stats[i].value.ui64 >> shift, suffix);
1040 } else {
1041 mdb_printf("%-25s = %9llu\n", stats[i].name,
1042 stats[i].value.ui64);
1043 }
1044 }
1045
1046 for (i = 0; extras[i]; i++) {
1047 uint64_t buf;
1048
1049 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) {
1050 mdb_warn("failed to find '%s'", extras[i]);
1051 return (DCMD_ERR);
1052 }
1053
1054 if (sym.st_size != sizeof (uint64_t) &&
1055 sym.st_size != sizeof (uint32_t)) {
1056 mdb_warn("expected scalar for variable '%s'\n",
1057 extras[i]);
1058 return (DCMD_ERR);
1059 }
1060
1061 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) {
1062 mdb_warn("couldn't read '%s'", extras[i]);
1063 return (DCMD_ERR);
1064 }
1065
1066 mdb_printf("%-25s = ", extras[i]);
1067
1068 /* NB: all the 64-bit extras happen to be byte counts */
1069 if (sym.st_size == sizeof (uint64_t))
1070 mdb_printf("%9llu %s\n", buf >> shift, suffix);
1071
1072 if (sym.st_size == sizeof (uint32_t))
1073 mdb_printf("%9d\n", *((uint32_t *)&buf));
1074 }
1075 return (DCMD_OK);
1076 }
1077
1078 typedef struct mdb_spa_print {
1079 pool_state_t spa_state;
1080 char spa_name[ZFS_MAX_DATASET_NAME_LEN];
1081 } mdb_spa_print_t;
1082
1083 /*
1084 * ::spa
1085 *
1086 * -c Print configuration information as well
1087 * -v Print vdev state
1088 * -e Print vdev error stats
1089 * -m Print vdev metaslab info
1090 * -M print vdev metaslab group info
1091 * -h Print histogram info (must be combined with -m or -M)
1092 *
1093 * Print a summarized spa_t. When given no arguments, prints out a table of all
1094 * active pools on the system.
1095 */
1096 /* ARGSUSED */
1097 static int
spa_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1098 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1099 {
1100 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED",
1101 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" };
1102 const char *state;
1103 int spa_flags = 0;
1104
1105 if (mdb_getopts(argc, argv,
1106 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags,
1107 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags,
1108 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1109 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1110 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1111 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1112 NULL) != argc)
1113 return (DCMD_USAGE);
1114
1115 if (!(flags & DCMD_ADDRSPEC)) {
1116 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) {
1117 mdb_warn("can't walk spa");
1118 return (DCMD_ERR);
1119 }
1120
1121 return (DCMD_OK);
1122 }
1123
1124 if (flags & DCMD_PIPE_OUT) {
1125 mdb_printf("%#lr\n", addr);
1126 return (DCMD_OK);
1127 }
1128
1129 if (DCMD_HDRSPEC(flags))
1130 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE",
1131 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME");
1132
1133 mdb_spa_print_t spa;
1134 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1)
1135 return (DCMD_ERR);
1136
1137 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL)
1138 state = "UNKNOWN";
1139 else
1140 state = statetab[spa.spa_state];
1141
1142 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name);
1143
1144 if (spa_flags & SPA_FLAG_CONFIG) {
1145 mdb_printf("\n");
1146 mdb_inc_indent(4);
1147 if (mdb_call_dcmd("spa_config", addr, flags, 0,
1148 NULL) != DCMD_OK)
1149 return (DCMD_ERR);
1150 mdb_dec_indent(4);
1151 }
1152
1153 if (spa_flags & SPA_FLAG_ALL_VDEV) {
1154 mdb_arg_t v;
1155 char opts[100] = "-";
1156 int args =
1157 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1;
1158
1159 if (spa_flags & SPA_FLAG_ERRORS)
1160 strcat(opts, "e");
1161 if (spa_flags & SPA_FLAG_METASLABS)
1162 strcat(opts, "m");
1163 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1164 strcat(opts, "M");
1165 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1166 strcat(opts, "h");
1167
1168 v.a_type = MDB_TYPE_STRING;
1169 v.a_un.a_str = opts;
1170
1171 mdb_printf("\n");
1172 mdb_inc_indent(4);
1173 if (mdb_call_dcmd("spa_vdevs", addr, flags, args,
1174 &v) != DCMD_OK)
1175 return (DCMD_ERR);
1176 mdb_dec_indent(4);
1177 }
1178
1179 return (DCMD_OK);
1180 }
1181
1182 typedef struct mdb_spa_config_spa {
1183 uintptr_t spa_config;
1184 } mdb_spa_config_spa_t;
1185
1186 /*
1187 * ::spa_config
1188 *
1189 * Given a spa_t, print the configuration information stored in spa_config.
1190 * Since it's just an nvlist, format it as an indented list of name=value pairs.
1191 * We simply read the value of spa_config and pass off to ::nvlist.
1192 */
1193 /* ARGSUSED */
1194 static int
spa_print_config(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1195 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1196 {
1197 mdb_spa_config_spa_t spa;
1198
1199 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1200 return (DCMD_USAGE);
1201
1202 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t",
1203 addr, 0) == -1)
1204 return (DCMD_ERR);
1205
1206 if (spa.spa_config == 0) {
1207 mdb_printf("(none)\n");
1208 return (DCMD_OK);
1209 }
1210
1211 return (mdb_call_dcmd("nvlist", spa.spa_config, flags,
1212 0, NULL));
1213 }
1214
1215 const char histo_stars[] = "****************************************";
1216 const int histo_width = sizeof (histo_stars) - 1;
1217
1218 static void
dump_histogram(const uint64_t * histo,int size,int offset)1219 dump_histogram(const uint64_t *histo, int size, int offset)
1220 {
1221 int i;
1222 int minidx = size - 1;
1223 int maxidx = 0;
1224 uint64_t max = 0;
1225
1226 for (i = 0; i < size; i++) {
1227 if (histo[i] > max)
1228 max = histo[i];
1229 if (histo[i] > 0 && i > maxidx)
1230 maxidx = i;
1231 if (histo[i] > 0 && i < minidx)
1232 minidx = i;
1233 }
1234
1235 if (max < histo_width)
1236 max = histo_width;
1237
1238 for (i = minidx; i <= maxidx; i++) {
1239 mdb_printf("%3u: %6llu %s\n",
1240 i + offset, (u_longlong_t)histo[i],
1241 &histo_stars[(max - histo[i]) * histo_width / max]);
1242 }
1243 }
1244
1245 typedef struct mdb_range_tree {
1246 uint64_t rt_space;
1247 } mdb_range_tree_t;
1248
1249 typedef struct mdb_metaslab_group {
1250 uint64_t mg_fragmentation;
1251 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE];
1252 } mdb_metaslab_group_t;
1253
1254 typedef struct mdb_metaslab {
1255 uint64_t ms_id;
1256 uint64_t ms_start;
1257 uint64_t ms_size;
1258 uint64_t ms_fragmentation;
1259 uintptr_t ms_alloctree[TXG_SIZE];
1260 uintptr_t ms_freetree[TXG_SIZE];
1261 uintptr_t ms_tree;
1262 uintptr_t ms_sm;
1263 } mdb_metaslab_t;
1264
1265 typedef struct mdb_space_map_phys_t {
1266 uint64_t smp_alloc;
1267 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE];
1268 } mdb_space_map_phys_t;
1269
1270 typedef struct mdb_space_map {
1271 uint64_t sm_size;
1272 uint8_t sm_shift;
1273 uint64_t sm_alloc;
1274 uintptr_t sm_phys;
1275 } mdb_space_map_t;
1276
1277 typedef struct mdb_vdev {
1278 uintptr_t vdev_ms;
1279 uint64_t vdev_ms_count;
1280 vdev_stat_t vdev_stat;
1281 } mdb_vdev_t;
1282
1283 static int
metaslab_stats(uintptr_t addr,int spa_flags)1284 metaslab_stats(uintptr_t addr, int spa_flags)
1285 {
1286 mdb_vdev_t vdev;
1287 uintptr_t *vdev_ms;
1288
1289 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t",
1290 (uintptr_t)addr, 0) == -1) {
1291 mdb_warn("failed to read vdev at %p\n", addr);
1292 return (DCMD_ERR);
1293 }
1294
1295 mdb_inc_indent(4);
1296 mdb_printf("%<u>%-?s %6s %20s %10s %9s%</u>\n", "ADDR", "ID",
1297 "OFFSET", "FREE", "FRAGMENTATION");
1298
1299 vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *),
1300 UM_SLEEP | UM_GC);
1301 if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *),
1302 (uintptr_t)vdev.vdev_ms) == -1) {
1303 mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms);
1304 return (DCMD_ERR);
1305 }
1306
1307 for (int m = 0; m < vdev.vdev_ms_count; m++) {
1308 mdb_metaslab_t ms;
1309 mdb_space_map_t sm = { 0 };
1310 char free[NICENUM_BUFLEN];
1311
1312 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1313 (uintptr_t)vdev_ms[m], 0) == -1)
1314 return (DCMD_ERR);
1315
1316 if (ms.ms_sm != NULL &&
1317 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t",
1318 ms.ms_sm, 0) == -1)
1319 return (DCMD_ERR);
1320
1321 mdb_nicenum(ms.ms_size - sm.sm_alloc, free);
1322
1323 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id,
1324 ms.ms_start, free);
1325 if (ms.ms_fragmentation == ZFS_FRAG_INVALID)
1326 mdb_printf("%9s\n", "-");
1327 else
1328 mdb_printf("%9llu%%\n", ms.ms_fragmentation);
1329
1330 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != NULL) {
1331 mdb_space_map_phys_t smp;
1332
1333 if (sm.sm_phys == NULL)
1334 continue;
1335
1336 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1337 "mdb_space_map_phys_t", sm.sm_phys, 0);
1338
1339 dump_histogram(smp.smp_histogram,
1340 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift);
1341 }
1342 }
1343 mdb_dec_indent(4);
1344 return (DCMD_OK);
1345 }
1346
1347 static int
metaslab_group_stats(uintptr_t addr,int spa_flags)1348 metaslab_group_stats(uintptr_t addr, int spa_flags)
1349 {
1350 mdb_metaslab_group_t mg;
1351 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t",
1352 (uintptr_t)addr, 0) == -1) {
1353 mdb_warn("failed to read vdev_mg at %p\n", addr);
1354 return (DCMD_ERR);
1355 }
1356
1357 mdb_inc_indent(4);
1358 mdb_printf("%<u>%-?s %15s%</u>\n", "ADDR", "FRAGMENTATION");
1359 if (mg.mg_fragmentation == ZFS_FRAG_INVALID)
1360 mdb_printf("%0?p %15s\n", addr, "-");
1361 else
1362 mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation);
1363
1364 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1365 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1366 mdb_dec_indent(4);
1367 return (DCMD_OK);
1368 }
1369
1370 /*
1371 * ::vdev
1372 *
1373 * Print out a summarized vdev_t, in the following form:
1374 *
1375 * ADDR STATE AUX DESC
1376 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0
1377 *
1378 * If '-r' is specified, recursively visit all children.
1379 *
1380 * With '-e', the statistics associated with the vdev are printed as well.
1381 */
1382 static int
do_print_vdev(uintptr_t addr,int flags,int depth,boolean_t recursive,int spa_flags)1383 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive,
1384 int spa_flags)
1385 {
1386 vdev_t vdev;
1387 char desc[MAXNAMELEN];
1388 int c, children;
1389 uintptr_t *child;
1390 const char *state, *aux;
1391
1392 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) {
1393 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr);
1394 return (DCMD_ERR);
1395 }
1396
1397 if (flags & DCMD_PIPE_OUT) {
1398 mdb_printf("%#lr\n", addr);
1399 } else {
1400 if (vdev.vdev_path != NULL) {
1401 if (mdb_readstr(desc, sizeof (desc),
1402 (uintptr_t)vdev.vdev_path) == -1) {
1403 mdb_warn("failed to read vdev_path at %p\n",
1404 vdev.vdev_path);
1405 return (DCMD_ERR);
1406 }
1407 } else if (vdev.vdev_ops != NULL) {
1408 vdev_ops_t ops;
1409 if (mdb_vread(&ops, sizeof (ops),
1410 (uintptr_t)vdev.vdev_ops) == -1) {
1411 mdb_warn("failed to read vdev_ops at %p\n",
1412 vdev.vdev_ops);
1413 return (DCMD_ERR);
1414 }
1415 (void) strcpy(desc, ops.vdev_op_type);
1416 } else {
1417 (void) strcpy(desc, "<unknown>");
1418 }
1419
1420 if (depth == 0 && DCMD_HDRSPEC(flags))
1421 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n",
1422 "ADDR", "STATE", "AUX",
1423 sizeof (uintptr_t) == 4 ? 43 : 35,
1424 "DESCRIPTION");
1425
1426 mdb_printf("%0?p ", addr);
1427
1428 switch (vdev.vdev_state) {
1429 case VDEV_STATE_CLOSED:
1430 state = "CLOSED";
1431 break;
1432 case VDEV_STATE_OFFLINE:
1433 state = "OFFLINE";
1434 break;
1435 case VDEV_STATE_CANT_OPEN:
1436 state = "CANT_OPEN";
1437 break;
1438 case VDEV_STATE_DEGRADED:
1439 state = "DEGRADED";
1440 break;
1441 case VDEV_STATE_HEALTHY:
1442 state = "HEALTHY";
1443 break;
1444 case VDEV_STATE_REMOVED:
1445 state = "REMOVED";
1446 break;
1447 case VDEV_STATE_FAULTED:
1448 state = "FAULTED";
1449 break;
1450 default:
1451 state = "UNKNOWN";
1452 break;
1453 }
1454
1455 switch (vdev.vdev_stat.vs_aux) {
1456 case VDEV_AUX_NONE:
1457 aux = "-";
1458 break;
1459 case VDEV_AUX_OPEN_FAILED:
1460 aux = "OPEN_FAILED";
1461 break;
1462 case VDEV_AUX_CORRUPT_DATA:
1463 aux = "CORRUPT_DATA";
1464 break;
1465 case VDEV_AUX_NO_REPLICAS:
1466 aux = "NO_REPLICAS";
1467 break;
1468 case VDEV_AUX_BAD_GUID_SUM:
1469 aux = "BAD_GUID_SUM";
1470 break;
1471 case VDEV_AUX_TOO_SMALL:
1472 aux = "TOO_SMALL";
1473 break;
1474 case VDEV_AUX_BAD_LABEL:
1475 aux = "BAD_LABEL";
1476 break;
1477 case VDEV_AUX_VERSION_NEWER:
1478 aux = "VERS_NEWER";
1479 break;
1480 case VDEV_AUX_VERSION_OLDER:
1481 aux = "VERS_OLDER";
1482 break;
1483 case VDEV_AUX_UNSUP_FEAT:
1484 aux = "UNSUP_FEAT";
1485 break;
1486 case VDEV_AUX_SPARED:
1487 aux = "SPARED";
1488 break;
1489 case VDEV_AUX_ERR_EXCEEDED:
1490 aux = "ERR_EXCEEDED";
1491 break;
1492 case VDEV_AUX_IO_FAILURE:
1493 aux = "IO_FAILURE";
1494 break;
1495 case VDEV_AUX_BAD_LOG:
1496 aux = "BAD_LOG";
1497 break;
1498 case VDEV_AUX_EXTERNAL:
1499 aux = "EXTERNAL";
1500 break;
1501 case VDEV_AUX_SPLIT_POOL:
1502 aux = "SPLIT_POOL";
1503 break;
1504 default:
1505 aux = "UNKNOWN";
1506 break;
1507 }
1508
1509 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc);
1510
1511 if (spa_flags & SPA_FLAG_ERRORS) {
1512 vdev_stat_t *vs = &vdev.vdev_stat;
1513 int i;
1514
1515 mdb_inc_indent(4);
1516 mdb_printf("\n");
1517 mdb_printf("%<u> %12s %12s %12s %12s "
1518 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM",
1519 "IOCTL");
1520 mdb_printf("OPS ");
1521 for (i = 1; i < ZIO_TYPES; i++)
1522 mdb_printf("%11#llx%s", vs->vs_ops[i],
1523 i == ZIO_TYPES - 1 ? "" : " ");
1524 mdb_printf("\n");
1525 mdb_printf("BYTES ");
1526 for (i = 1; i < ZIO_TYPES; i++)
1527 mdb_printf("%11#llx%s", vs->vs_bytes[i],
1528 i == ZIO_TYPES - 1 ? "" : " ");
1529
1530
1531 mdb_printf("\n");
1532 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors);
1533 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors);
1534 mdb_printf("ECKSUM %10#llx\n",
1535 vs->vs_checksum_errors);
1536 mdb_dec_indent(4);
1537 mdb_printf("\n");
1538 }
1539
1540 if (spa_flags & SPA_FLAG_METASLAB_GROUPS &&
1541 vdev.vdev_mg != NULL) {
1542 metaslab_group_stats((uintptr_t)vdev.vdev_mg,
1543 spa_flags);
1544 }
1545 if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) {
1546 metaslab_stats((uintptr_t)addr, spa_flags);
1547 }
1548 }
1549
1550 children = vdev.vdev_children;
1551
1552 if (children == 0 || !recursive)
1553 return (DCMD_OK);
1554
1555 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC);
1556 if (mdb_vread(child, children * sizeof (void *),
1557 (uintptr_t)vdev.vdev_child) == -1) {
1558 mdb_warn("failed to read vdev children at %p", vdev.vdev_child);
1559 return (DCMD_ERR);
1560 }
1561
1562 for (c = 0; c < children; c++) {
1563 if (do_print_vdev(child[c], flags, depth + 2, recursive,
1564 spa_flags)) {
1565 return (DCMD_ERR);
1566 }
1567 }
1568
1569 return (DCMD_OK);
1570 }
1571
1572 static int
vdev_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1573 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1574 {
1575 uint64_t depth = 0;
1576 boolean_t recursive = B_FALSE;
1577 int spa_flags = 0;
1578
1579 if (mdb_getopts(argc, argv,
1580 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1581 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1582 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1583 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1584 'r', MDB_OPT_SETBITS, TRUE, &recursive,
1585 'd', MDB_OPT_UINT64, &depth, NULL) != argc)
1586 return (DCMD_USAGE);
1587
1588 if (!(flags & DCMD_ADDRSPEC)) {
1589 mdb_warn("no vdev_t address given\n");
1590 return (DCMD_ERR);
1591 }
1592
1593 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags));
1594 }
1595
1596 typedef struct metaslab_walk_data {
1597 uint64_t mw_numvdevs;
1598 uintptr_t *mw_vdevs;
1599 int mw_curvdev;
1600 uint64_t mw_nummss;
1601 uintptr_t *mw_mss;
1602 int mw_curms;
1603 } metaslab_walk_data_t;
1604
1605 static int
metaslab_walk_step(mdb_walk_state_t * wsp)1606 metaslab_walk_step(mdb_walk_state_t *wsp)
1607 {
1608 metaslab_walk_data_t *mw = wsp->walk_data;
1609 metaslab_t ms;
1610 uintptr_t msp;
1611
1612 if (mw->mw_curvdev >= mw->mw_numvdevs)
1613 return (WALK_DONE);
1614
1615 if (mw->mw_mss == NULL) {
1616 uintptr_t mssp;
1617 uintptr_t vdevp;
1618
1619 ASSERT(mw->mw_curms == 0);
1620 ASSERT(mw->mw_nummss == 0);
1621
1622 vdevp = mw->mw_vdevs[mw->mw_curvdev];
1623 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) ||
1624 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) {
1625 return (WALK_ERR);
1626 }
1627
1628 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*),
1629 UM_SLEEP | UM_GC);
1630 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*),
1631 mssp) == -1) {
1632 mdb_warn("failed to read vdev_ms at %p", mssp);
1633 return (WALK_ERR);
1634 }
1635 }
1636
1637 if (mw->mw_curms >= mw->mw_nummss) {
1638 mw->mw_mss = NULL;
1639 mw->mw_curms = 0;
1640 mw->mw_nummss = 0;
1641 mw->mw_curvdev++;
1642 return (WALK_NEXT);
1643 }
1644
1645 msp = mw->mw_mss[mw->mw_curms];
1646 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) {
1647 mdb_warn("failed to read metaslab_t at %p", msp);
1648 return (WALK_ERR);
1649 }
1650
1651 mw->mw_curms++;
1652
1653 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata));
1654 }
1655
1656 /* ARGSUSED */
1657 static int
metaslab_walk_init(mdb_walk_state_t * wsp)1658 metaslab_walk_init(mdb_walk_state_t *wsp)
1659 {
1660 metaslab_walk_data_t *mw;
1661 uintptr_t root_vdevp;
1662 uintptr_t childp;
1663
1664 if (wsp->walk_addr == NULL) {
1665 mdb_warn("must supply address of spa_t\n");
1666 return (WALK_ERR);
1667 }
1668
1669 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC);
1670
1671 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) ||
1672 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) ||
1673 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) {
1674 return (DCMD_ERR);
1675 }
1676
1677 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *),
1678 UM_SLEEP | UM_GC);
1679 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *),
1680 childp) == -1) {
1681 mdb_warn("failed to read root vdev children at %p", childp);
1682 return (DCMD_ERR);
1683 }
1684
1685 wsp->walk_data = mw;
1686
1687 return (WALK_NEXT);
1688 }
1689
1690 typedef struct mdb_spa {
1691 uintptr_t spa_dsl_pool;
1692 uintptr_t spa_root_vdev;
1693 } mdb_spa_t;
1694
1695 typedef struct mdb_dsl_pool {
1696 uintptr_t dp_root_dir;
1697 } mdb_dsl_pool_t;
1698
1699 typedef struct mdb_dsl_dir {
1700 uintptr_t dd_dbuf;
1701 int64_t dd_space_towrite[TXG_SIZE];
1702 } mdb_dsl_dir_t;
1703
1704 typedef struct mdb_dsl_dir_phys {
1705 uint64_t dd_used_bytes;
1706 uint64_t dd_compressed_bytes;
1707 uint64_t dd_uncompressed_bytes;
1708 } mdb_dsl_dir_phys_t;
1709
1710 typedef struct space_data {
1711 uint64_t ms_alloctree[TXG_SIZE];
1712 uint64_t ms_freetree[TXG_SIZE];
1713 uint64_t ms_tree;
1714 uint64_t avail;
1715 uint64_t nowavail;
1716 } space_data_t;
1717
1718 /* ARGSUSED */
1719 static int
space_cb(uintptr_t addr,const void * unknown,void * arg)1720 space_cb(uintptr_t addr, const void *unknown, void *arg)
1721 {
1722 space_data_t *sd = arg;
1723 mdb_metaslab_t ms;
1724 mdb_range_tree_t rt;
1725 mdb_space_map_t sm = { 0 };
1726 mdb_space_map_phys_t smp = { 0 };
1727 int i;
1728
1729 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1730 addr, 0) == -1)
1731 return (WALK_ERR);
1732
1733 for (i = 0; i < TXG_SIZE; i++) {
1734 if (mdb_ctf_vread(&rt, "range_tree_t",
1735 "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1)
1736 return (WALK_ERR);
1737
1738 sd->ms_alloctree[i] += rt.rt_space;
1739
1740 if (mdb_ctf_vread(&rt, "range_tree_t",
1741 "mdb_range_tree_t", ms.ms_freetree[i], 0) == -1)
1742 return (WALK_ERR);
1743
1744 sd->ms_freetree[i] += rt.rt_space;
1745 }
1746
1747 if (mdb_ctf_vread(&rt, "range_tree_t",
1748 "mdb_range_tree_t", ms.ms_tree, 0) == -1)
1749 return (WALK_ERR);
1750
1751 if (ms.ms_sm != NULL &&
1752 mdb_ctf_vread(&sm, "space_map_t",
1753 "mdb_space_map_t", ms.ms_sm, 0) == -1)
1754 return (WALK_ERR);
1755
1756 if (sm.sm_phys != NULL) {
1757 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1758 "mdb_space_map_phys_t", sm.sm_phys, 0);
1759 }
1760
1761 sd->ms_tree += rt.rt_space;
1762 sd->avail += sm.sm_size - sm.sm_alloc;
1763 sd->nowavail += sm.sm_size - smp.smp_alloc;
1764
1765 return (WALK_NEXT);
1766 }
1767
1768 /*
1769 * ::spa_space [-b]
1770 *
1771 * Given a spa_t, print out it's on-disk space usage and in-core
1772 * estimates of future usage. If -b is given, print space in bytes.
1773 * Otherwise print in megabytes.
1774 */
1775 /* ARGSUSED */
1776 static int
spa_space(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1777 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1778 {
1779 mdb_spa_t spa;
1780 mdb_dsl_pool_t dp;
1781 mdb_dsl_dir_t dd;
1782 mdb_dmu_buf_impl_t db;
1783 mdb_dsl_dir_phys_t dsp;
1784 space_data_t sd;
1785 int shift = 20;
1786 char *suffix = "M";
1787 int bytes = B_FALSE;
1788
1789 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) !=
1790 argc)
1791 return (DCMD_USAGE);
1792 if (!(flags & DCMD_ADDRSPEC))
1793 return (DCMD_USAGE);
1794
1795 if (bytes) {
1796 shift = 0;
1797 suffix = "";
1798 }
1799
1800 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t",
1801 addr, 0) == -1 ||
1802 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t",
1803 spa.spa_dsl_pool, 0) == -1 ||
1804 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t",
1805 dp.dp_root_dir, 0) == -1 ||
1806 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
1807 dd.dd_dbuf, 0) == -1 ||
1808 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys",
1809 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) {
1810 return (DCMD_ERR);
1811 }
1812
1813 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n",
1814 dd.dd_space_towrite[0] >> shift, suffix,
1815 dd.dd_space_towrite[1] >> shift, suffix,
1816 dd.dd_space_towrite[2] >> shift, suffix,
1817 dd.dd_space_towrite[3] >> shift, suffix);
1818
1819 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n",
1820 dsp.dd_used_bytes >> shift, suffix);
1821 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n",
1822 dsp.dd_compressed_bytes >> shift, suffix);
1823 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n",
1824 dsp.dd_uncompressed_bytes >> shift, suffix);
1825
1826 bzero(&sd, sizeof (sd));
1827 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) {
1828 mdb_warn("can't walk metaslabs");
1829 return (DCMD_ERR);
1830 }
1831
1832 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n",
1833 sd.ms_alloctree[0] >> shift, suffix,
1834 sd.ms_alloctree[1] >> shift, suffix,
1835 sd.ms_alloctree[2] >> shift, suffix,
1836 sd.ms_alloctree[3] >> shift, suffix);
1837 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n",
1838 sd.ms_freetree[0] >> shift, suffix,
1839 sd.ms_freetree[1] >> shift, suffix,
1840 sd.ms_freetree[2] >> shift, suffix,
1841 sd.ms_freetree[3] >> shift, suffix);
1842 mdb_printf("ms_tree = %llu%s\n", sd.ms_tree >> shift, suffix);
1843 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix);
1844 mdb_printf("current syncing avail = %llu%s\n",
1845 sd.nowavail >> shift, suffix);
1846
1847 return (DCMD_OK);
1848 }
1849
1850 typedef struct mdb_spa_aux_vdev {
1851 int sav_count;
1852 uintptr_t sav_vdevs;
1853 } mdb_spa_aux_vdev_t;
1854
1855 typedef struct mdb_spa_vdevs {
1856 uintptr_t spa_root_vdev;
1857 mdb_spa_aux_vdev_t spa_l2cache;
1858 mdb_spa_aux_vdev_t spa_spares;
1859 } mdb_spa_vdevs_t;
1860
1861 static int
spa_print_aux(mdb_spa_aux_vdev_t * sav,uint_t flags,mdb_arg_t * v,const char * name)1862 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v,
1863 const char *name)
1864 {
1865 uintptr_t *aux;
1866 size_t len;
1867 int ret, i;
1868
1869 /*
1870 * Iterate over aux vdevs and print those out as well. This is a
1871 * little annoying because we don't have a root vdev to pass to ::vdev.
1872 * Instead, we print a single line and then call it for each child
1873 * vdev.
1874 */
1875 if (sav->sav_count != 0) {
1876 v[1].a_type = MDB_TYPE_STRING;
1877 v[1].a_un.a_str = "-d";
1878 v[2].a_type = MDB_TYPE_IMMEDIATE;
1879 v[2].a_un.a_val = 2;
1880
1881 len = sav->sav_count * sizeof (uintptr_t);
1882 aux = mdb_alloc(len, UM_SLEEP);
1883 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) {
1884 mdb_free(aux, len);
1885 mdb_warn("failed to read l2cache vdevs at %p",
1886 sav->sav_vdevs);
1887 return (DCMD_ERR);
1888 }
1889
1890 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name);
1891
1892 for (i = 0; i < sav->sav_count; i++) {
1893 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v);
1894 if (ret != DCMD_OK) {
1895 mdb_free(aux, len);
1896 return (ret);
1897 }
1898 }
1899
1900 mdb_free(aux, len);
1901 }
1902
1903 return (0);
1904 }
1905
1906 /*
1907 * ::spa_vdevs
1908 *
1909 * -e Include error stats
1910 * -m Include metaslab information
1911 * -M Include metaslab group information
1912 * -h Include histogram information (requires -m or -M)
1913 *
1914 * Print out a summarized list of vdevs for the given spa_t.
1915 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as
1916 * iterating over the cache devices.
1917 */
1918 /* ARGSUSED */
1919 static int
spa_vdevs(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1920 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1921 {
1922 mdb_arg_t v[3];
1923 int ret;
1924 char opts[100] = "-r";
1925 int spa_flags = 0;
1926
1927 if (mdb_getopts(argc, argv,
1928 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1929 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1930 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1931 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1932 NULL) != argc)
1933 return (DCMD_USAGE);
1934
1935 if (!(flags & DCMD_ADDRSPEC))
1936 return (DCMD_USAGE);
1937
1938 mdb_spa_vdevs_t spa;
1939 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1)
1940 return (DCMD_ERR);
1941
1942 /*
1943 * Unitialized spa_t structures can have a NULL root vdev.
1944 */
1945 if (spa.spa_root_vdev == NULL) {
1946 mdb_printf("no associated vdevs\n");
1947 return (DCMD_OK);
1948 }
1949
1950 if (spa_flags & SPA_FLAG_ERRORS)
1951 strcat(opts, "e");
1952 if (spa_flags & SPA_FLAG_METASLABS)
1953 strcat(opts, "m");
1954 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1955 strcat(opts, "M");
1956 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1957 strcat(opts, "h");
1958
1959 v[0].a_type = MDB_TYPE_STRING;
1960 v[0].a_un.a_str = opts;
1961
1962 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev,
1963 flags, 1, v);
1964 if (ret != DCMD_OK)
1965 return (ret);
1966
1967 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 ||
1968 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0)
1969 return (DCMD_ERR);
1970
1971 return (DCMD_OK);
1972 }
1973
1974 /*
1975 * ::zio
1976 *
1977 * Print a summary of zio_t and all its children. This is intended to display a
1978 * zio tree, and hence we only pick the most important pieces of information for
1979 * the main summary. More detailed information can always be found by doing a
1980 * '::print zio' on the underlying zio_t. The columns we display are:
1981 *
1982 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED
1983 *
1984 * The 'address' column is indented by one space for each depth level as we
1985 * descend down the tree.
1986 */
1987
1988 #define ZIO_MAXINDENT 7
1989 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT)
1990 #define ZIO_WALK_SELF 0
1991 #define ZIO_WALK_CHILD 1
1992 #define ZIO_WALK_PARENT 2
1993
1994 typedef struct zio_print_args {
1995 int zpa_current_depth;
1996 int zpa_min_depth;
1997 int zpa_max_depth;
1998 int zpa_type;
1999 uint_t zpa_flags;
2000 } zio_print_args_t;
2001
2002 typedef struct mdb_zio {
2003 enum zio_type io_type;
2004 enum zio_stage io_stage;
2005 uintptr_t io_waiter;
2006 uintptr_t io_spa;
2007 struct {
2008 struct {
2009 uintptr_t list_next;
2010 } list_head;
2011 } io_parent_list;
2012 int io_error;
2013 } mdb_zio_t;
2014
2015 typedef struct mdb_zio_timestamp {
2016 hrtime_t io_timestamp;
2017 } mdb_zio_timestamp_t;
2018
2019 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg);
2020
2021 static int
zio_print_cb(uintptr_t addr,zio_print_args_t * zpa)2022 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa)
2023 {
2024 mdb_ctf_id_t type_enum, stage_enum;
2025 int indent = zpa->zpa_current_depth;
2026 const char *type, *stage;
2027 uintptr_t laddr;
2028 mdb_zio_t zio;
2029 mdb_zio_timestamp_t zio_timestamp = { 0 };
2030
2031 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1)
2032 return (WALK_ERR);
2033 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio",
2034 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET);
2035
2036 if (indent > ZIO_MAXINDENT)
2037 indent = ZIO_MAXINDENT;
2038
2039 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 ||
2040 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) {
2041 mdb_warn("failed to lookup zio enums");
2042 return (WALK_ERR);
2043 }
2044
2045 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL)
2046 type += sizeof ("ZIO_TYPE_") - 1;
2047 else
2048 type = "?";
2049
2050 if (zio.io_error == 0) {
2051 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage);
2052 if (stage != NULL)
2053 stage += sizeof ("ZIO_STAGE_") - 1;
2054 else
2055 stage = "?";
2056 } else {
2057 stage = "FAILED";
2058 }
2059
2060 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) {
2061 if (zpa->zpa_flags & DCMD_PIPE_OUT) {
2062 mdb_printf("%?p\n", addr);
2063 } else {
2064 mdb_printf("%*s%-*p %-5s %-16s ", indent, "",
2065 ZIO_MAXWIDTH - indent, addr, type, stage);
2066 if (zio.io_waiter != 0)
2067 mdb_printf("%-16lx ", zio.io_waiter);
2068 else
2069 mdb_printf("%-16s ", "-");
2070 #ifdef _KERNEL
2071 if (zio_timestamp.io_timestamp != 0) {
2072 mdb_printf("%llums", (mdb_gethrtime() -
2073 zio_timestamp.io_timestamp) /
2074 1000000);
2075 } else {
2076 mdb_printf("%-12s ", "-");
2077 }
2078 #else
2079 mdb_printf("%-12s ", "-");
2080 #endif
2081 mdb_printf("\n");
2082 }
2083 }
2084
2085 if (zpa->zpa_current_depth >= zpa->zpa_max_depth)
2086 return (WALK_NEXT);
2087
2088 if (zpa->zpa_type == ZIO_WALK_PARENT)
2089 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2090 "io_parent_list");
2091 else
2092 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2093 "io_child_list");
2094
2095 zpa->zpa_current_depth++;
2096 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) {
2097 mdb_warn("failed to walk zio_t children at %p\n", laddr);
2098 return (WALK_ERR);
2099 }
2100 zpa->zpa_current_depth--;
2101
2102 return (WALK_NEXT);
2103 }
2104
2105 /* ARGSUSED */
2106 static int
zio_child_cb(uintptr_t addr,const void * unknown,void * arg)2107 zio_child_cb(uintptr_t addr, const void *unknown, void *arg)
2108 {
2109 zio_link_t zl;
2110 uintptr_t ziop;
2111 zio_print_args_t *zpa = arg;
2112
2113 if (mdb_vread(&zl, sizeof (zl), addr) == -1) {
2114 mdb_warn("failed to read zio_link_t at %p", addr);
2115 return (WALK_ERR);
2116 }
2117
2118 if (zpa->zpa_type == ZIO_WALK_PARENT)
2119 ziop = (uintptr_t)zl.zl_parent;
2120 else
2121 ziop = (uintptr_t)zl.zl_child;
2122
2123 return (zio_print_cb(ziop, zpa));
2124 }
2125
2126 /* ARGSUSED */
2127 static int
zio_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2128 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2129 {
2130 zio_print_args_t zpa = { 0 };
2131
2132 if (!(flags & DCMD_ADDRSPEC))
2133 return (DCMD_USAGE);
2134
2135 if (mdb_getopts(argc, argv,
2136 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth,
2137 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type,
2138 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type,
2139 NULL) != argc)
2140 return (DCMD_USAGE);
2141
2142 zpa.zpa_flags = flags;
2143 if (zpa.zpa_max_depth != 0) {
2144 if (zpa.zpa_type == ZIO_WALK_SELF)
2145 zpa.zpa_type = ZIO_WALK_CHILD;
2146 } else if (zpa.zpa_type != ZIO_WALK_SELF) {
2147 zpa.zpa_min_depth = 1;
2148 zpa.zpa_max_depth = 1;
2149 }
2150
2151 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) {
2152 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n",
2153 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER",
2154 "TIME_ELAPSED");
2155 }
2156
2157 if (zio_print_cb(addr, &zpa) != WALK_NEXT)
2158 return (DCMD_ERR);
2159
2160 return (DCMD_OK);
2161 }
2162
2163 /*
2164 * [addr]::zio_state
2165 *
2166 * Print a summary of all zio_t structures on the system, or for a particular
2167 * pool. This is equivalent to '::walk zio_root | ::zio'.
2168 */
2169 /*ARGSUSED*/
2170 static int
zio_state(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2171 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2172 {
2173 /*
2174 * MDB will remember the last address of the pipeline, so if we don't
2175 * zero this we'll end up trying to walk zio structures for a
2176 * non-existent spa_t.
2177 */
2178 if (!(flags & DCMD_ADDRSPEC))
2179 addr = 0;
2180
2181 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr));
2182 }
2183
2184 typedef struct txg_list_walk_data {
2185 uintptr_t lw_head[TXG_SIZE];
2186 int lw_txgoff;
2187 int lw_maxoff;
2188 size_t lw_offset;
2189 void *lw_obj;
2190 } txg_list_walk_data_t;
2191
2192 static int
txg_list_walk_init_common(mdb_walk_state_t * wsp,int txg,int maxoff)2193 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff)
2194 {
2195 txg_list_walk_data_t *lwd;
2196 txg_list_t list;
2197 int i;
2198
2199 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC);
2200 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) {
2201 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr);
2202 return (WALK_ERR);
2203 }
2204
2205 for (i = 0; i < TXG_SIZE; i++)
2206 lwd->lw_head[i] = (uintptr_t)list.tl_head[i];
2207 lwd->lw_offset = list.tl_offset;
2208 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t),
2209 UM_SLEEP | UM_GC);
2210 lwd->lw_txgoff = txg;
2211 lwd->lw_maxoff = maxoff;
2212
2213 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2214 wsp->walk_data = lwd;
2215
2216 return (WALK_NEXT);
2217 }
2218
2219 static int
txg_list_walk_init(mdb_walk_state_t * wsp)2220 txg_list_walk_init(mdb_walk_state_t *wsp)
2221 {
2222 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1));
2223 }
2224
2225 static int
txg_list0_walk_init(mdb_walk_state_t * wsp)2226 txg_list0_walk_init(mdb_walk_state_t *wsp)
2227 {
2228 return (txg_list_walk_init_common(wsp, 0, 0));
2229 }
2230
2231 static int
txg_list1_walk_init(mdb_walk_state_t * wsp)2232 txg_list1_walk_init(mdb_walk_state_t *wsp)
2233 {
2234 return (txg_list_walk_init_common(wsp, 1, 1));
2235 }
2236
2237 static int
txg_list2_walk_init(mdb_walk_state_t * wsp)2238 txg_list2_walk_init(mdb_walk_state_t *wsp)
2239 {
2240 return (txg_list_walk_init_common(wsp, 2, 2));
2241 }
2242
2243 static int
txg_list3_walk_init(mdb_walk_state_t * wsp)2244 txg_list3_walk_init(mdb_walk_state_t *wsp)
2245 {
2246 return (txg_list_walk_init_common(wsp, 3, 3));
2247 }
2248
2249 static int
txg_list_walk_step(mdb_walk_state_t * wsp)2250 txg_list_walk_step(mdb_walk_state_t *wsp)
2251 {
2252 txg_list_walk_data_t *lwd = wsp->walk_data;
2253 uintptr_t addr;
2254 txg_node_t *node;
2255 int status;
2256
2257 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) {
2258 lwd->lw_txgoff++;
2259 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2260 }
2261
2262 if (wsp->walk_addr == NULL)
2263 return (WALK_DONE);
2264
2265 addr = wsp->walk_addr - lwd->lw_offset;
2266
2267 if (mdb_vread(lwd->lw_obj,
2268 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) {
2269 mdb_warn("failed to read list element at %#lx", addr);
2270 return (WALK_ERR);
2271 }
2272
2273 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata);
2274 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset);
2275 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff];
2276
2277 return (status);
2278 }
2279
2280 /*
2281 * ::walk spa
2282 *
2283 * Walk all named spa_t structures in the namespace. This is nothing more than
2284 * a layered avl walk.
2285 */
2286 static int
spa_walk_init(mdb_walk_state_t * wsp)2287 spa_walk_init(mdb_walk_state_t *wsp)
2288 {
2289 GElf_Sym sym;
2290
2291 if (wsp->walk_addr != NULL) {
2292 mdb_warn("spa walk only supports global walks\n");
2293 return (WALK_ERR);
2294 }
2295
2296 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) {
2297 mdb_warn("failed to find symbol 'spa_namespace_avl'");
2298 return (WALK_ERR);
2299 }
2300
2301 wsp->walk_addr = (uintptr_t)sym.st_value;
2302
2303 if (mdb_layered_walk("avl", wsp) == -1) {
2304 mdb_warn("failed to walk 'avl'\n");
2305 return (WALK_ERR);
2306 }
2307
2308 return (WALK_NEXT);
2309 }
2310
2311 static int
spa_walk_step(mdb_walk_state_t * wsp)2312 spa_walk_step(mdb_walk_state_t *wsp)
2313 {
2314 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata));
2315 }
2316
2317 /*
2318 * [addr]::walk zio
2319 *
2320 * Walk all active zio_t structures on the system. This is simply a layered
2321 * walk on top of ::walk zio_cache, with the optional ability to limit the
2322 * structures to a particular pool.
2323 */
2324 static int
zio_walk_init(mdb_walk_state_t * wsp)2325 zio_walk_init(mdb_walk_state_t *wsp)
2326 {
2327 wsp->walk_data = (void *)wsp->walk_addr;
2328
2329 if (mdb_layered_walk("zio_cache", wsp) == -1) {
2330 mdb_warn("failed to walk 'zio_cache'\n");
2331 return (WALK_ERR);
2332 }
2333
2334 return (WALK_NEXT);
2335 }
2336
2337 static int
zio_walk_step(mdb_walk_state_t * wsp)2338 zio_walk_step(mdb_walk_state_t *wsp)
2339 {
2340 mdb_zio_t zio;
2341 uintptr_t spa = (uintptr_t)wsp->walk_data;
2342
2343 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2344 wsp->walk_addr, 0) == -1)
2345 return (WALK_ERR);
2346
2347 if (spa != 0 && spa != zio.io_spa)
2348 return (WALK_NEXT);
2349
2350 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2351 }
2352
2353 /*
2354 * [addr]::walk zio_root
2355 *
2356 * Walk only root zio_t structures, optionally for a particular spa_t.
2357 */
2358 static int
zio_walk_root_step(mdb_walk_state_t * wsp)2359 zio_walk_root_step(mdb_walk_state_t *wsp)
2360 {
2361 mdb_zio_t zio;
2362 uintptr_t spa = (uintptr_t)wsp->walk_data;
2363
2364 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2365 wsp->walk_addr, 0) == -1)
2366 return (WALK_ERR);
2367
2368 if (spa != 0 && spa != zio.io_spa)
2369 return (WALK_NEXT);
2370
2371 /* If the parent list is not empty, ignore */
2372 if (zio.io_parent_list.list_head.list_next !=
2373 wsp->walk_addr +
2374 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") +
2375 mdb_ctf_offsetof_by_name("struct list", "list_head"))
2376 return (WALK_NEXT);
2377
2378 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2379 }
2380
2381 /*
2382 * ::zfs_blkstats
2383 *
2384 * -v print verbose per-level information
2385 *
2386 */
2387 static int
zfs_blkstats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2388 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2389 {
2390 boolean_t verbose = B_FALSE;
2391 zfs_all_blkstats_t stats;
2392 dmu_object_type_t t;
2393 zfs_blkstat_t *tzb;
2394 uint64_t ditto;
2395 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10];
2396 /* +10 in case it grew */
2397
2398 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) {
2399 mdb_warn("failed to read 'dmu_ot'");
2400 return (DCMD_ERR);
2401 }
2402
2403 if (mdb_getopts(argc, argv,
2404 'v', MDB_OPT_SETBITS, TRUE, &verbose,
2405 NULL) != argc)
2406 return (DCMD_USAGE);
2407
2408 if (!(flags & DCMD_ADDRSPEC))
2409 return (DCMD_USAGE);
2410
2411 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) ||
2412 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) ||
2413 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) {
2414 mdb_warn("failed to read data at %p;", addr);
2415 mdb_printf("maybe no stats? run \"zpool scrub\" first.");
2416 return (DCMD_ERR);
2417 }
2418
2419 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL];
2420 if (tzb->zb_gangs != 0) {
2421 mdb_printf("Ganged blocks: %llu\n",
2422 (longlong_t)tzb->zb_gangs);
2423 }
2424
2425 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev +
2426 tzb->zb_ditto_3_of_3_samevdev;
2427 if (ditto != 0) {
2428 mdb_printf("Dittoed blocks on same vdev: %llu\n",
2429 (longlong_t)ditto);
2430 }
2431
2432 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2433 "\t avg\t comp\t%%Total\tType\n");
2434
2435 for (t = 0; t <= DMU_OT_TOTAL; t++) {
2436 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN];
2437 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN];
2438 char avg[NICENUM_BUFLEN];
2439 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN];
2440 char typename[64];
2441 int l;
2442
2443
2444 if (t == DMU_OT_DEFERRED)
2445 strcpy(typename, "deferred free");
2446 else if (t == DMU_OT_OTHER)
2447 strcpy(typename, "other");
2448 else if (t == DMU_OT_TOTAL)
2449 strcpy(typename, "Total");
2450 else if (mdb_readstr(typename, sizeof (typename),
2451 (uintptr_t)dmu_ot[t].ot_name) == -1) {
2452 mdb_warn("failed to read type name");
2453 return (DCMD_ERR);
2454 }
2455
2456 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0)
2457 continue;
2458
2459 for (l = -1; l < DN_MAX_LEVELS; l++) {
2460 int level = (l == -1 ? DN_MAX_LEVELS : l);
2461 zfs_blkstat_t *zb = &stats.zab_type[level][t];
2462
2463 if (zb->zb_asize == 0)
2464 continue;
2465
2466 /*
2467 * Don't print each level unless requested.
2468 */
2469 if (!verbose && level != DN_MAX_LEVELS)
2470 continue;
2471
2472 /*
2473 * If all the space is level 0, don't print the
2474 * level 0 separately.
2475 */
2476 if (level == 0 && zb->zb_asize ==
2477 stats.zab_type[DN_MAX_LEVELS][t].zb_asize)
2478 continue;
2479
2480 mdb_nicenum(zb->zb_count, csize);
2481 mdb_nicenum(zb->zb_lsize, lsize);
2482 mdb_nicenum(zb->zb_psize, psize);
2483 mdb_nicenum(zb->zb_asize, asize);
2484 mdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2485 (void) snprintfrac(comp, NICENUM_BUFLEN,
2486 zb->zb_lsize, zb->zb_psize, 2);
2487 (void) snprintfrac(pct, NICENUM_BUFLEN,
2488 100 * zb->zb_asize, tzb->zb_asize, 2);
2489
2490 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s"
2491 "\t%5s\t%6s\t",
2492 csize, lsize, psize, asize, avg, comp, pct);
2493
2494 if (level == DN_MAX_LEVELS)
2495 mdb_printf("%s\n", typename);
2496 else
2497 mdb_printf(" L%d %s\n",
2498 level, typename);
2499 }
2500 }
2501
2502 return (DCMD_OK);
2503 }
2504
2505 typedef struct mdb_reference {
2506 uintptr_t ref_holder;
2507 uintptr_t ref_removed;
2508 uint64_t ref_number;
2509 } mdb_reference_t;
2510
2511 /* ARGSUSED */
2512 static int
reference_cb(uintptr_t addr,const void * ignored,void * arg)2513 reference_cb(uintptr_t addr, const void *ignored, void *arg)
2514 {
2515 mdb_reference_t ref;
2516 boolean_t holder_is_str = B_FALSE;
2517 char holder_str[128];
2518 boolean_t removed = (boolean_t)arg;
2519
2520 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr,
2521 0) == -1)
2522 return (DCMD_ERR);
2523
2524 if (mdb_readstr(holder_str, sizeof (holder_str),
2525 ref.ref_holder) != -1)
2526 holder_is_str = strisprint(holder_str);
2527
2528 if (removed)
2529 mdb_printf("removed ");
2530 mdb_printf("reference ");
2531 if (ref.ref_number != 1)
2532 mdb_printf("with count=%llu ", ref.ref_number);
2533 mdb_printf("with tag %lx", ref.ref_holder);
2534 if (holder_is_str)
2535 mdb_printf(" \"%s\"", holder_str);
2536 mdb_printf(", held at:\n");
2537
2538 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
2539
2540 if (removed) {
2541 mdb_printf("removed at:\n");
2542 (void) mdb_call_dcmd("whatis", ref.ref_removed,
2543 DCMD_ADDRSPEC, 0, NULL);
2544 }
2545
2546 mdb_printf("\n");
2547
2548 return (WALK_NEXT);
2549 }
2550
2551 typedef struct mdb_refcount {
2552 uint64_t rc_count;
2553 } mdb_refcount_t;
2554
2555 typedef struct mdb_refcount_removed {
2556 uint64_t rc_removed_count;
2557 } mdb_refcount_removed_t;
2558
2559 typedef struct mdb_refcount_tracked {
2560 boolean_t rc_tracked;
2561 } mdb_refcount_tracked_t;
2562
2563 /* ARGSUSED */
2564 static int
refcount(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2565 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2566 {
2567 mdb_refcount_t rc;
2568 mdb_refcount_removed_t rcr;
2569 mdb_refcount_tracked_t rct;
2570 int off;
2571 boolean_t released = B_FALSE;
2572
2573 if (!(flags & DCMD_ADDRSPEC))
2574 return (DCMD_USAGE);
2575
2576 if (mdb_getopts(argc, argv,
2577 'r', MDB_OPT_SETBITS, B_TRUE, &released,
2578 NULL) != argc)
2579 return (DCMD_USAGE);
2580
2581 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr,
2582 0) == -1)
2583 return (DCMD_ERR);
2584
2585 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr,
2586 MDB_CTF_VREAD_QUIET) == -1) {
2587 mdb_printf("refcount_t at %p has %llu holds (untracked)\n",
2588 addr, (longlong_t)rc.rc_count);
2589 return (DCMD_OK);
2590 }
2591
2592 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr,
2593 MDB_CTF_VREAD_QUIET) == -1) {
2594 /* If this is an old target, it might be tracked. */
2595 rct.rc_tracked = B_TRUE;
2596 }
2597
2598 mdb_printf("refcount_t at %p has %llu current holds, "
2599 "%llu recently released holds\n",
2600 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count);
2601
2602 if (rct.rc_tracked && rc.rc_count > 0)
2603 mdb_printf("current holds:\n");
2604 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list");
2605 if (off == -1)
2606 return (DCMD_ERR);
2607 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off);
2608
2609 if (released && rcr.rc_removed_count > 0) {
2610 mdb_printf("released holds:\n");
2611
2612 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed");
2613 if (off == -1)
2614 return (DCMD_ERR);
2615 mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off);
2616 }
2617
2618 return (DCMD_OK);
2619 }
2620
2621 /* ARGSUSED */
2622 static int
sa_attr_table(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2623 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2624 {
2625 sa_attr_table_t *table;
2626 sa_os_t sa_os;
2627 char *name;
2628 int i;
2629
2630 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) {
2631 mdb_warn("failed to read sa_os at %p", addr);
2632 return (DCMD_ERR);
2633 }
2634
2635 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2636 UM_SLEEP | UM_GC);
2637 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC);
2638
2639 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2640 (uintptr_t)sa_os.sa_attr_table) == -1) {
2641 mdb_warn("failed to read sa_os at %p", addr);
2642 return (DCMD_ERR);
2643 }
2644
2645 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n",
2646 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME");
2647 for (i = 0; i != sa_os.sa_num_attrs; i++) {
2648 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name);
2649 mdb_printf("%5x %8x %8x %8x %-s\n",
2650 (int)table[i].sa_attr, (int)table[i].sa_registered,
2651 (int)table[i].sa_length, table[i].sa_byteswap, name);
2652 }
2653
2654 return (DCMD_OK);
2655 }
2656
2657 static int
sa_get_off_table(uintptr_t addr,uint32_t ** off_tab,int attr_count)2658 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count)
2659 {
2660 uintptr_t idx_table;
2661
2662 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) {
2663 mdb_printf("can't find offset table in sa_idx_tab\n");
2664 return (-1);
2665 }
2666
2667 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t),
2668 UM_SLEEP | UM_GC);
2669
2670 if (mdb_vread(*off_tab,
2671 attr_count * sizeof (uint32_t), idx_table) == -1) {
2672 mdb_warn("failed to attribute offset table %p", idx_table);
2673 return (-1);
2674 }
2675
2676 return (DCMD_OK);
2677 }
2678
2679 /*ARGSUSED*/
2680 static int
sa_attr_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2681 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2682 {
2683 uint32_t *offset_tab;
2684 int attr_count;
2685 uint64_t attr_id;
2686 uintptr_t attr_addr;
2687 uintptr_t bonus_tab, spill_tab;
2688 uintptr_t db_bonus, db_spill;
2689 uintptr_t os, os_sa;
2690 uintptr_t db_data;
2691
2692 if (argc != 1)
2693 return (DCMD_USAGE);
2694
2695 if (argv[0].a_type == MDB_TYPE_STRING)
2696 attr_id = mdb_strtoull(argv[0].a_un.a_str);
2697 else
2698 return (DCMD_USAGE);
2699
2700 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) ||
2701 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) ||
2702 GETMEMB(addr, "sa_handle", sa_os, os) ||
2703 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) ||
2704 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) {
2705 mdb_printf("Can't find necessary information in sa_handle "
2706 "in sa_handle\n");
2707 return (DCMD_ERR);
2708 }
2709
2710 if (GETMEMB(os, "objset", os_sa, os_sa)) {
2711 mdb_printf("Can't find os_sa in objset\n");
2712 return (DCMD_ERR);
2713 }
2714
2715 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) {
2716 mdb_printf("Can't find sa_num_attrs\n");
2717 return (DCMD_ERR);
2718 }
2719
2720 if (attr_id > attr_count) {
2721 mdb_printf("attribute id number is out of range\n");
2722 return (DCMD_ERR);
2723 }
2724
2725 if (bonus_tab) {
2726 if (sa_get_off_table(bonus_tab, &offset_tab,
2727 attr_count) == -1) {
2728 return (DCMD_ERR);
2729 }
2730
2731 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) {
2732 mdb_printf("can't find db_data in bonus dbuf\n");
2733 return (DCMD_ERR);
2734 }
2735 }
2736
2737 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) &&
2738 spill_tab == NULL) {
2739 mdb_printf("Attribute does not exist\n");
2740 return (DCMD_ERR);
2741 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) {
2742 if (sa_get_off_table(spill_tab, &offset_tab,
2743 attr_count) == -1) {
2744 return (DCMD_ERR);
2745 }
2746 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) {
2747 mdb_printf("can't find db_data in spill dbuf\n");
2748 return (DCMD_ERR);
2749 }
2750 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) {
2751 mdb_printf("Attribute does not exist\n");
2752 return (DCMD_ERR);
2753 }
2754 }
2755 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]);
2756 mdb_printf("%p\n", attr_addr);
2757 return (DCMD_OK);
2758 }
2759
2760 /* ARGSUSED */
2761 static int
zfs_ace_print_common(uintptr_t addr,uint_t flags,uint64_t id,uint32_t access_mask,uint16_t ace_flags,uint16_t ace_type,int verbose)2762 zfs_ace_print_common(uintptr_t addr, uint_t flags,
2763 uint64_t id, uint32_t access_mask, uint16_t ace_flags,
2764 uint16_t ace_type, int verbose)
2765 {
2766 if (DCMD_HDRSPEC(flags) && !verbose)
2767 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n",
2768 "ADDR", "FLAGS", "MASK", "TYPE", "ID");
2769
2770 if (!verbose) {
2771 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr,
2772 ace_flags, access_mask, ace_type, id);
2773 return (DCMD_OK);
2774 }
2775
2776 switch (ace_flags & ACE_TYPE_FLAGS) {
2777 case ACE_OWNER:
2778 mdb_printf("owner@:");
2779 break;
2780 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
2781 mdb_printf("group@:");
2782 break;
2783 case ACE_EVERYONE:
2784 mdb_printf("everyone@:");
2785 break;
2786 case ACE_IDENTIFIER_GROUP:
2787 mdb_printf("group:%llx:", (u_longlong_t)id);
2788 break;
2789 case 0: /* User entry */
2790 mdb_printf("user:%llx:", (u_longlong_t)id);
2791 break;
2792 }
2793
2794 /* print out permission mask */
2795 if (access_mask & ACE_READ_DATA)
2796 mdb_printf("r");
2797 else
2798 mdb_printf("-");
2799 if (access_mask & ACE_WRITE_DATA)
2800 mdb_printf("w");
2801 else
2802 mdb_printf("-");
2803 if (access_mask & ACE_EXECUTE)
2804 mdb_printf("x");
2805 else
2806 mdb_printf("-");
2807 if (access_mask & ACE_APPEND_DATA)
2808 mdb_printf("p");
2809 else
2810 mdb_printf("-");
2811 if (access_mask & ACE_DELETE)
2812 mdb_printf("d");
2813 else
2814 mdb_printf("-");
2815 if (access_mask & ACE_DELETE_CHILD)
2816 mdb_printf("D");
2817 else
2818 mdb_printf("-");
2819 if (access_mask & ACE_READ_ATTRIBUTES)
2820 mdb_printf("a");
2821 else
2822 mdb_printf("-");
2823 if (access_mask & ACE_WRITE_ATTRIBUTES)
2824 mdb_printf("A");
2825 else
2826 mdb_printf("-");
2827 if (access_mask & ACE_READ_NAMED_ATTRS)
2828 mdb_printf("R");
2829 else
2830 mdb_printf("-");
2831 if (access_mask & ACE_WRITE_NAMED_ATTRS)
2832 mdb_printf("W");
2833 else
2834 mdb_printf("-");
2835 if (access_mask & ACE_READ_ACL)
2836 mdb_printf("c");
2837 else
2838 mdb_printf("-");
2839 if (access_mask & ACE_WRITE_ACL)
2840 mdb_printf("C");
2841 else
2842 mdb_printf("-");
2843 if (access_mask & ACE_WRITE_OWNER)
2844 mdb_printf("o");
2845 else
2846 mdb_printf("-");
2847 if (access_mask & ACE_SYNCHRONIZE)
2848 mdb_printf("s");
2849 else
2850 mdb_printf("-");
2851
2852 mdb_printf(":");
2853
2854 /* Print out inheritance flags */
2855 if (ace_flags & ACE_FILE_INHERIT_ACE)
2856 mdb_printf("f");
2857 else
2858 mdb_printf("-");
2859 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE)
2860 mdb_printf("d");
2861 else
2862 mdb_printf("-");
2863 if (ace_flags & ACE_INHERIT_ONLY_ACE)
2864 mdb_printf("i");
2865 else
2866 mdb_printf("-");
2867 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE)
2868 mdb_printf("n");
2869 else
2870 mdb_printf("-");
2871 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)
2872 mdb_printf("S");
2873 else
2874 mdb_printf("-");
2875 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG)
2876 mdb_printf("F");
2877 else
2878 mdb_printf("-");
2879 if (ace_flags & ACE_INHERITED_ACE)
2880 mdb_printf("I");
2881 else
2882 mdb_printf("-");
2883
2884 switch (ace_type) {
2885 case ACE_ACCESS_ALLOWED_ACE_TYPE:
2886 mdb_printf(":allow\n");
2887 break;
2888 case ACE_ACCESS_DENIED_ACE_TYPE:
2889 mdb_printf(":deny\n");
2890 break;
2891 case ACE_SYSTEM_AUDIT_ACE_TYPE:
2892 mdb_printf(":audit\n");
2893 break;
2894 case ACE_SYSTEM_ALARM_ACE_TYPE:
2895 mdb_printf(":alarm\n");
2896 break;
2897 default:
2898 mdb_printf(":?\n");
2899 }
2900 return (DCMD_OK);
2901 }
2902
2903 /* ARGSUSED */
2904 static int
zfs_ace_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2905 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2906 {
2907 zfs_ace_t zace;
2908 int verbose = FALSE;
2909 uint64_t id;
2910
2911 if (!(flags & DCMD_ADDRSPEC))
2912 return (DCMD_USAGE);
2913
2914 if (mdb_getopts(argc, argv,
2915 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2916 return (DCMD_USAGE);
2917
2918 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) {
2919 mdb_warn("failed to read zfs_ace_t");
2920 return (DCMD_ERR);
2921 }
2922
2923 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 ||
2924 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2925 id = zace.z_fuid;
2926 else
2927 id = -1;
2928
2929 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask,
2930 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose));
2931 }
2932
2933 /* ARGSUSED */
2934 static int
zfs_ace0_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2935 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2936 {
2937 ace_t ace;
2938 uint64_t id;
2939 int verbose = FALSE;
2940
2941 if (!(flags & DCMD_ADDRSPEC))
2942 return (DCMD_USAGE);
2943
2944 if (mdb_getopts(argc, argv,
2945 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2946 return (DCMD_USAGE);
2947
2948 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) {
2949 mdb_warn("failed to read ace_t");
2950 return (DCMD_ERR);
2951 }
2952
2953 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 ||
2954 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2955 id = ace.a_who;
2956 else
2957 id = -1;
2958
2959 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask,
2960 ace.a_flags, ace.a_type, verbose));
2961 }
2962
2963 typedef struct acl_dump_args {
2964 int a_argc;
2965 const mdb_arg_t *a_argv;
2966 uint16_t a_version;
2967 int a_flags;
2968 } acl_dump_args_t;
2969
2970 /* ARGSUSED */
2971 static int
acl_aces_cb(uintptr_t addr,const void * unknown,void * arg)2972 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg)
2973 {
2974 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2975
2976 if (acl_args->a_version == 1) {
2977 if (mdb_call_dcmd("zfs_ace", addr,
2978 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2979 acl_args->a_argv) != DCMD_OK) {
2980 return (WALK_ERR);
2981 }
2982 } else {
2983 if (mdb_call_dcmd("zfs_ace0", addr,
2984 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2985 acl_args->a_argv) != DCMD_OK) {
2986 return (WALK_ERR);
2987 }
2988 }
2989 acl_args->a_flags = DCMD_LOOP;
2990 return (WALK_NEXT);
2991 }
2992
2993 /* ARGSUSED */
2994 static int
acl_cb(uintptr_t addr,const void * unknown,void * arg)2995 acl_cb(uintptr_t addr, const void *unknown, void *arg)
2996 {
2997 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2998
2999 if (acl_args->a_version == 1) {
3000 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb,
3001 arg, addr) != 0) {
3002 mdb_warn("can't walk ACEs");
3003 return (DCMD_ERR);
3004 }
3005 } else {
3006 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb,
3007 arg, addr) != 0) {
3008 mdb_warn("can't walk ACEs");
3009 return (DCMD_ERR);
3010 }
3011 }
3012 return (WALK_NEXT);
3013 }
3014
3015 /* ARGSUSED */
3016 static int
zfs_acl_dump(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3017 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3018 {
3019 zfs_acl_t zacl;
3020 int verbose = FALSE;
3021 acl_dump_args_t acl_args;
3022
3023 if (!(flags & DCMD_ADDRSPEC))
3024 return (DCMD_USAGE);
3025
3026 if (mdb_getopts(argc, argv,
3027 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3028 return (DCMD_USAGE);
3029
3030 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) {
3031 mdb_warn("failed to read zfs_acl_t");
3032 return (DCMD_ERR);
3033 }
3034
3035 acl_args.a_argc = argc;
3036 acl_args.a_argv = argv;
3037 acl_args.a_version = zacl.z_version;
3038 acl_args.a_flags = DCMD_LOOPFIRST;
3039
3040 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) {
3041 mdb_warn("can't walk ACL");
3042 return (DCMD_ERR);
3043 }
3044
3045 return (DCMD_OK);
3046 }
3047
3048 /* ARGSUSED */
3049 static int
zfs_acl_node_walk_init(mdb_walk_state_t * wsp)3050 zfs_acl_node_walk_init(mdb_walk_state_t *wsp)
3051 {
3052 if (wsp->walk_addr == NULL) {
3053 mdb_warn("must supply address of zfs_acl_node_t\n");
3054 return (WALK_ERR);
3055 }
3056
3057 wsp->walk_addr +=
3058 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl");
3059
3060 if (mdb_layered_walk("list", wsp) == -1) {
3061 mdb_warn("failed to walk 'list'\n");
3062 return (WALK_ERR);
3063 }
3064
3065 return (WALK_NEXT);
3066 }
3067
3068 static int
zfs_acl_node_walk_step(mdb_walk_state_t * wsp)3069 zfs_acl_node_walk_step(mdb_walk_state_t *wsp)
3070 {
3071 zfs_acl_node_t aclnode;
3072
3073 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t),
3074 wsp->walk_addr) == -1) {
3075 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr);
3076 return (WALK_ERR);
3077 }
3078
3079 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata));
3080 }
3081
3082 typedef struct ace_walk_data {
3083 int ace_count;
3084 int ace_version;
3085 } ace_walk_data_t;
3086
3087 static int
zfs_aces_walk_init_common(mdb_walk_state_t * wsp,int version,int ace_count,uintptr_t ace_data)3088 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version,
3089 int ace_count, uintptr_t ace_data)
3090 {
3091 ace_walk_data_t *ace_walk_data;
3092
3093 if (wsp->walk_addr == NULL) {
3094 mdb_warn("must supply address of zfs_acl_node_t\n");
3095 return (WALK_ERR);
3096 }
3097
3098 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC);
3099
3100 ace_walk_data->ace_count = ace_count;
3101 ace_walk_data->ace_version = version;
3102
3103 wsp->walk_addr = ace_data;
3104 wsp->walk_data = ace_walk_data;
3105
3106 return (WALK_NEXT);
3107 }
3108
3109 static int
zfs_acl_node_aces_walk_init_common(mdb_walk_state_t * wsp,int version)3110 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version)
3111 {
3112 static int gotid;
3113 static mdb_ctf_id_t acl_id;
3114 int z_ace_count;
3115 uintptr_t z_acldata;
3116
3117 if (!gotid) {
3118 if (mdb_ctf_lookup_by_name("struct zfs_acl_node",
3119 &acl_id) == -1) {
3120 mdb_warn("couldn't find struct zfs_acl_node");
3121 return (DCMD_ERR);
3122 }
3123 gotid = TRUE;
3124 }
3125
3126 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) {
3127 return (DCMD_ERR);
3128 }
3129 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) {
3130 return (DCMD_ERR);
3131 }
3132
3133 return (zfs_aces_walk_init_common(wsp, version,
3134 z_ace_count, z_acldata));
3135 }
3136
3137 /* ARGSUSED */
3138 static int
zfs_acl_node_aces_walk_init(mdb_walk_state_t * wsp)3139 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp)
3140 {
3141 return (zfs_acl_node_aces_walk_init_common(wsp, 1));
3142 }
3143
3144 /* ARGSUSED */
3145 static int
zfs_acl_node_aces0_walk_init(mdb_walk_state_t * wsp)3146 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp)
3147 {
3148 return (zfs_acl_node_aces_walk_init_common(wsp, 0));
3149 }
3150
3151 static int
zfs_aces_walk_step(mdb_walk_state_t * wsp)3152 zfs_aces_walk_step(mdb_walk_state_t *wsp)
3153 {
3154 ace_walk_data_t *ace_data = wsp->walk_data;
3155 zfs_ace_t zace;
3156 ace_t *acep;
3157 int status;
3158 int entry_type;
3159 int allow_type;
3160 uintptr_t ptr;
3161
3162 if (ace_data->ace_count == 0)
3163 return (WALK_DONE);
3164
3165 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) {
3166 mdb_warn("failed to read zfs_ace_t at %#lx",
3167 wsp->walk_addr);
3168 return (WALK_ERR);
3169 }
3170
3171 switch (ace_data->ace_version) {
3172 case 0:
3173 acep = (ace_t *)&zace;
3174 entry_type = acep->a_flags & ACE_TYPE_FLAGS;
3175 allow_type = acep->a_type;
3176 break;
3177 case 1:
3178 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS;
3179 allow_type = zace.z_hdr.z_type;
3180 break;
3181 default:
3182 return (WALK_ERR);
3183 }
3184
3185 ptr = (uintptr_t)wsp->walk_addr;
3186 switch (entry_type) {
3187 case ACE_OWNER:
3188 case ACE_EVERYONE:
3189 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
3190 ptr += ace_data->ace_version == 0 ?
3191 sizeof (ace_t) : sizeof (zfs_ace_hdr_t);
3192 break;
3193 case ACE_IDENTIFIER_GROUP:
3194 default:
3195 switch (allow_type) {
3196 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
3197 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
3198 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
3199 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
3200 ptr += ace_data->ace_version == 0 ?
3201 sizeof (ace_t) : sizeof (zfs_object_ace_t);
3202 break;
3203 default:
3204 ptr += ace_data->ace_version == 0 ?
3205 sizeof (ace_t) : sizeof (zfs_ace_t);
3206 break;
3207 }
3208 }
3209
3210 ace_data->ace_count--;
3211 status = wsp->walk_callback(wsp->walk_addr,
3212 (void *)(uintptr_t)&zace, wsp->walk_cbdata);
3213
3214 wsp->walk_addr = ptr;
3215 return (status);
3216 }
3217
3218 typedef struct mdb_zfs_rrwlock {
3219 uintptr_t rr_writer;
3220 boolean_t rr_writer_wanted;
3221 } mdb_zfs_rrwlock_t;
3222
3223 static uint_t rrw_key;
3224
3225 /* ARGSUSED */
3226 static int
rrwlock(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3227 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3228 {
3229 mdb_zfs_rrwlock_t rrw;
3230
3231 if (rrw_key == 0) {
3232 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1)
3233 return (DCMD_ERR);
3234 }
3235
3236 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr,
3237 0) == -1)
3238 return (DCMD_ERR);
3239
3240 if (rrw.rr_writer != 0) {
3241 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer);
3242 return (DCMD_OK);
3243 }
3244
3245 if (rrw.rr_writer_wanted) {
3246 mdb_printf("writer wanted\n");
3247 }
3248
3249 mdb_printf("anonymous references:\n");
3250 (void) mdb_call_dcmd("refcount", addr +
3251 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"),
3252 DCMD_ADDRSPEC, 0, NULL);
3253
3254 mdb_printf("linked references:\n");
3255 (void) mdb_call_dcmd("refcount", addr +
3256 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"),
3257 DCMD_ADDRSPEC, 0, NULL);
3258
3259 /*
3260 * XXX This should find references from
3261 * "::walk thread | ::tsd -v <rrw_key>", but there is no support
3262 * for programmatic consumption of dcmds, so this would be
3263 * difficult, potentially requiring reimplementing ::tsd (both
3264 * user and kernel versions) in this MDB module.
3265 */
3266
3267 return (DCMD_OK);
3268 }
3269
3270 /*
3271 * MDB module linkage information:
3272 *
3273 * We declare a list of structures describing our dcmds, and a function
3274 * named _mdb_init to return a pointer to our module information.
3275 */
3276
3277 static const mdb_dcmd_t dcmds[] = {
3278 { "arc", "[-bkmg]", "print ARC variables", arc_print },
3279 { "blkptr", ":", "print blkptr_t", blkptr },
3280 { "dbuf", ":", "print dmu_buf_impl_t", dbuf },
3281 { "dbuf_stats", ":", "dbuf stats", dbuf_stats },
3282 { "dbufs",
3283 "\t[-O objset_t*] [-n objset_name | \"mos\"] "
3284 "[-o object | \"mdn\"] \n"
3285 "\t[-l level] [-b blkid | \"bonus\"]",
3286 "find dmu_buf_impl_t's that match specified criteria", dbufs },
3287 { "abuf_find", "dva_word[0] dva_word[1]",
3288 "find arc_buf_hdr_t of a specified DVA",
3289 abuf_find },
3290 { "spa", "?[-cevmMh]\n"
3291 "\t-c display spa config\n"
3292 "\t-e display vdev statistics\n"
3293 "\t-v display vdev information\n"
3294 "\t-m display metaslab statistics\n"
3295 "\t-M display metaslab group statistics\n"
3296 "\t-h display histogram (requires -m or -M)\n",
3297 "spa_t summary", spa_print },
3298 { "spa_config", ":", "print spa_t configuration", spa_print_config },
3299 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space },
3300 { "spa_vdevs", ":[-emMh]\n"
3301 "\t-e display vdev statistics\n"
3302 "\t-m dispaly metaslab statistics\n"
3303 "\t-M display metaslab group statistic\n"
3304 "\t-h display histogram (requires -m or -M)\n",
3305 "given a spa_t, print vdev summary", spa_vdevs },
3306 { "vdev", ":[-re]\n"
3307 "\t-r display recursively\n"
3308 "\t-e display statistics\n"
3309 "\t-m display metaslab statistics\n"
3310 "\t-M display metaslab group statistics\n"
3311 "\t-h display histogram (requires -m or -M)\n",
3312 "vdev_t summary", vdev_print },
3313 { "zio", ":[-cpr]\n"
3314 "\t-c display children\n"
3315 "\t-p display parents\n"
3316 "\t-r display recursively",
3317 "zio_t summary", zio_print },
3318 { "zio_state", "?", "print out all zio_t structures on system or "
3319 "for a particular pool", zio_state },
3320 { "zfs_blkstats", ":[-v]",
3321 "given a spa_t, print block type stats from last scrub",
3322 zfs_blkstats },
3323 { "zfs_params", "", "print zfs tunable parameters", zfs_params },
3324 { "refcount", ":[-r]\n"
3325 "\t-r display recently removed references",
3326 "print refcount_t holders", refcount },
3327 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf },
3328 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t",
3329 zfs_acl_dump },
3330 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print },
3331 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print },
3332 { "sa_attr_table", ":", "print SA attribute table from sa_os_t",
3333 sa_attr_table},
3334 { "sa_attr", ": attr_id",
3335 "print SA attribute address when given sa_handle_t", sa_attr_print},
3336 { "zfs_dbgmsg", ":[-va]",
3337 "print zfs debug log", dbgmsg},
3338 { "rrwlock", ":",
3339 "print rrwlock_t, including readers", rrwlock},
3340 { NULL }
3341 };
3342
3343 static const mdb_walker_t walkers[] = {
3344 { "zms_freelist", "walk ZFS metaslab freelist",
3345 freelist_walk_init, freelist_walk_step, NULL },
3346 { "txg_list", "given any txg_list_t *, walk all entries in all txgs",
3347 txg_list_walk_init, txg_list_walk_step, NULL },
3348 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0",
3349 txg_list0_walk_init, txg_list_walk_step, NULL },
3350 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1",
3351 txg_list1_walk_init, txg_list_walk_step, NULL },
3352 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2",
3353 txg_list2_walk_init, txg_list_walk_step, NULL },
3354 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3",
3355 txg_list3_walk_init, txg_list_walk_step, NULL },
3356 { "zio", "walk all zio structures, optionally for a particular spa_t",
3357 zio_walk_init, zio_walk_step, NULL },
3358 { "zio_root",
3359 "walk all root zio_t structures, optionally for a particular spa_t",
3360 zio_walk_init, zio_walk_root_step, NULL },
3361 { "spa", "walk all spa_t entries in the namespace",
3362 spa_walk_init, spa_walk_step, NULL },
3363 { "metaslab", "given a spa_t *, walk all metaslab_t structures",
3364 metaslab_walk_init, metaslab_walk_step, NULL },
3365 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes",
3366 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL },
3367 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs",
3368 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL },
3369 { "zfs_acl_node_aces0",
3370 "given a zfs_acl_node_t, walk all ACEs as ace_t",
3371 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL },
3372 { NULL }
3373 };
3374
3375 static const mdb_modinfo_t modinfo = {
3376 MDB_API_VERSION, dcmds, walkers
3377 };
3378
3379 const mdb_modinfo_t *
_mdb_init(void)3380 _mdb_init(void)
3381 {
3382 return (&modinfo);
3383 }
3384