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 int ptr_width = (int)(sizeof (void *)) * 2;
471
472 if (DCMD_HDRSPEC(flags))
473 mdb_printf("%*s %8s %3s %9s %5s %s\n",
474 ptr_width, "addr", "object", "lvl", "blkid", "holds", "os");
475
476 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
477 addr, 0) == -1)
478 return (DCMD_ERR);
479
480 if (db.db.db_object == DMU_META_DNODE_OBJECT)
481 (void) strcpy(objectname, "mdn");
482 else
483 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx",
484 (u_longlong_t)db.db.db_object);
485
486 if (db.db_blkid == DMU_BONUS_BLKID)
487 (void) strcpy(blkidname, "bonus");
488 else
489 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx",
490 (u_longlong_t)db.db_blkid);
491
492 if (objset_name(db.db_objset, path)) {
493 return (DCMD_ERR);
494 }
495
496 mdb_printf("%*p %8s %3u %9s %5llu %s\n", ptr_width, addr,
497 objectname, (int)db.db_level, blkidname,
498 db.db_holds.rc_count, path);
499
500 return (DCMD_OK);
501 }
502
503 /* ARGSUSED */
504 static int
dbuf_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)505 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
506 {
507 #define HISTOSZ 32
508 uintptr_t dbp;
509 dmu_buf_impl_t db;
510 dbuf_hash_table_t ht;
511 uint64_t bucket, ndbufs;
512 uint64_t histo[HISTOSZ];
513 uint64_t histo2[HISTOSZ];
514 int i, maxidx;
515
516 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) {
517 mdb_warn("failed to read 'dbuf_hash_table'");
518 return (DCMD_ERR);
519 }
520
521 for (i = 0; i < HISTOSZ; i++) {
522 histo[i] = 0;
523 histo2[i] = 0;
524 }
525
526 ndbufs = 0;
527 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) {
528 int len;
529
530 if (mdb_vread(&dbp, sizeof (void *),
531 (uintptr_t)(ht.hash_table+bucket)) == -1) {
532 mdb_warn("failed to read hash bucket %u at %p",
533 bucket, ht.hash_table+bucket);
534 return (DCMD_ERR);
535 }
536
537 len = 0;
538 while (dbp != 0) {
539 if (mdb_vread(&db, sizeof (dmu_buf_impl_t),
540 dbp) == -1) {
541 mdb_warn("failed to read dbuf at %p", dbp);
542 return (DCMD_ERR);
543 }
544 dbp = (uintptr_t)db.db_hash_next;
545 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--)
546 histo2[i]++;
547 len++;
548 ndbufs++;
549 }
550
551 if (len >= HISTOSZ)
552 len = HISTOSZ-1;
553 histo[len]++;
554 }
555
556 mdb_printf("hash table has %llu buckets, %llu dbufs "
557 "(avg %llu buckets/dbuf)\n",
558 ht.hash_table_mask+1, ndbufs,
559 (ht.hash_table_mask+1)/ndbufs);
560
561 mdb_printf("\n");
562 maxidx = 0;
563 for (i = 0; i < HISTOSZ; i++)
564 if (histo[i] > 0)
565 maxidx = i;
566 mdb_printf("hash chain length number of buckets\n");
567 for (i = 0; i <= maxidx; i++)
568 mdb_printf("%u %llu\n", i, histo[i]);
569
570 mdb_printf("\n");
571 maxidx = 0;
572 for (i = 0; i < HISTOSZ; i++)
573 if (histo2[i] > 0)
574 maxidx = i;
575 mdb_printf("hash chain depth number of dbufs\n");
576 for (i = 0; i <= maxidx; i++)
577 mdb_printf("%u or more %llu %llu%%\n",
578 i, histo2[i], histo2[i]*100/ndbufs);
579
580
581 return (DCMD_OK);
582 }
583
584 #define CHAIN_END 0xffff
585 /*
586 * ::zap_leaf [-v]
587 *
588 * Print a zap_leaf_phys_t, assumed to be 16k
589 */
590 /* ARGSUSED */
591 static int
zap_leaf(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)592 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
593 {
594 char buf[16*1024];
595 int verbose = B_FALSE;
596 int four = B_FALSE;
597 dmu_buf_t l_dbuf;
598 zap_leaf_t l;
599 zap_leaf_phys_t *zlp = (void *)buf;
600 int i;
601
602 if (mdb_getopts(argc, argv,
603 'v', MDB_OPT_SETBITS, TRUE, &verbose,
604 '4', MDB_OPT_SETBITS, TRUE, &four,
605 NULL) != argc)
606 return (DCMD_USAGE);
607
608 l_dbuf.db_data = zlp;
609 l.l_dbuf = &l_dbuf;
610 l.l_bs = 14; /* assume 16k blocks */
611 if (four)
612 l.l_bs = 12;
613
614 if (!(flags & DCMD_ADDRSPEC)) {
615 return (DCMD_USAGE);
616 }
617
618 if (mdb_vread(buf, sizeof (buf), addr) == -1) {
619 mdb_warn("failed to read zap_leaf_phys_t at %p", addr);
620 return (DCMD_ERR);
621 }
622
623 if (zlp->l_hdr.lh_block_type != ZBT_LEAF ||
624 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) {
625 mdb_warn("This does not appear to be a zap_leaf_phys_t");
626 return (DCMD_ERR);
627 }
628
629 mdb_printf("zap_leaf_phys_t at %p:\n", addr);
630 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len);
631 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix);
632 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries);
633 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree,
634 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l)));
635 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist);
636 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags,
637 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ?
638 "ENTRIES_CDSORTED" : "");
639
640 if (verbose) {
641 mdb_printf(" hash table:\n");
642 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) {
643 if (zlp->l_hash[i] != CHAIN_END)
644 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]);
645 }
646 }
647
648 mdb_printf(" chunks:\n");
649 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) {
650 /* LINTED: alignment */
651 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i);
652 switch (zlc->l_entry.le_type) {
653 case ZAP_CHUNK_FREE:
654 if (verbose) {
655 mdb_printf(" %u: free; lf_next = %u\n",
656 i, zlc->l_free.lf_next);
657 }
658 break;
659 case ZAP_CHUNK_ENTRY:
660 mdb_printf(" %u: entry\n", i);
661 if (verbose) {
662 mdb_printf(" le_next = %u\n",
663 zlc->l_entry.le_next);
664 }
665 mdb_printf(" le_name_chunk = %u\n",
666 zlc->l_entry.le_name_chunk);
667 mdb_printf(" le_name_numints = %u\n",
668 zlc->l_entry.le_name_numints);
669 mdb_printf(" le_value_chunk = %u\n",
670 zlc->l_entry.le_value_chunk);
671 mdb_printf(" le_value_intlen = %u\n",
672 zlc->l_entry.le_value_intlen);
673 mdb_printf(" le_value_numints = %u\n",
674 zlc->l_entry.le_value_numints);
675 mdb_printf(" le_cd = %u\n",
676 zlc->l_entry.le_cd);
677 mdb_printf(" le_hash = %llx\n",
678 zlc->l_entry.le_hash);
679 break;
680 case ZAP_CHUNK_ARRAY:
681 mdb_printf(" %u: array", i);
682 if (strisprint((char *)zlc->l_array.la_array))
683 mdb_printf(" \"%s\"", zlc->l_array.la_array);
684 mdb_printf("\n");
685 if (verbose) {
686 int j;
687 mdb_printf(" ");
688 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) {
689 mdb_printf("%02x ",
690 zlc->l_array.la_array[j]);
691 }
692 mdb_printf("\n");
693 }
694 if (zlc->l_array.la_next != CHAIN_END) {
695 mdb_printf(" lf_next = %u\n",
696 zlc->l_array.la_next);
697 }
698 break;
699 default:
700 mdb_printf(" %u: undefined type %u\n",
701 zlc->l_entry.le_type);
702 }
703 }
704
705 return (DCMD_OK);
706 }
707
708 typedef struct dbufs_data {
709 mdb_ctf_id_t id;
710 uint64_t objset;
711 uint64_t object;
712 uint64_t level;
713 uint64_t blkid;
714 char *osname;
715 } dbufs_data_t;
716
717 #define DBUFS_UNSET (0xbaddcafedeadbeefULL)
718
719 /* ARGSUSED */
720 static int
dbufs_cb(uintptr_t addr,const void * unknown,void * arg)721 dbufs_cb(uintptr_t addr, const void *unknown, void *arg)
722 {
723 dbufs_data_t *data = arg;
724 uintptr_t objset;
725 dmu_buf_t db;
726 uint8_t level;
727 uint64_t blkid;
728 char osname[ZFS_MAX_DATASET_NAME_LEN];
729
730 if (GETMEMBID(addr, &data->id, db_objset, objset) ||
731 GETMEMBID(addr, &data->id, db, db) ||
732 GETMEMBID(addr, &data->id, db_level, level) ||
733 GETMEMBID(addr, &data->id, db_blkid, blkid)) {
734 return (WALK_ERR);
735 }
736
737 if ((data->objset == DBUFS_UNSET || data->objset == objset) &&
738 (data->osname == NULL || (objset_name(objset, osname) == 0 &&
739 strcmp(data->osname, osname) == 0)) &&
740 (data->object == DBUFS_UNSET || data->object == db.db_object) &&
741 (data->level == DBUFS_UNSET || data->level == level) &&
742 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) {
743 mdb_printf("%#lr\n", addr);
744 }
745 return (WALK_NEXT);
746 }
747
748 /* ARGSUSED */
749 static int
dbufs(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)750 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
751 {
752 dbufs_data_t data;
753 char *object = NULL;
754 char *blkid = NULL;
755
756 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET;
757 data.osname = NULL;
758
759 if (mdb_getopts(argc, argv,
760 'O', MDB_OPT_UINT64, &data.objset,
761 'n', MDB_OPT_STR, &data.osname,
762 'o', MDB_OPT_STR, &object,
763 'l', MDB_OPT_UINT64, &data.level,
764 'b', MDB_OPT_STR, &blkid) != argc) {
765 return (DCMD_USAGE);
766 }
767
768 if (object) {
769 if (strcmp(object, "mdn") == 0) {
770 data.object = DMU_META_DNODE_OBJECT;
771 } else {
772 data.object = mdb_strtoull(object);
773 }
774 }
775
776 if (blkid) {
777 if (strcmp(blkid, "bonus") == 0) {
778 data.blkid = DMU_BONUS_BLKID;
779 } else {
780 data.blkid = mdb_strtoull(blkid);
781 }
782 }
783
784 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) {
785 mdb_warn("couldn't find struct dmu_buf_impl_t");
786 return (DCMD_ERR);
787 }
788
789 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) {
790 mdb_warn("can't walk dbufs");
791 return (DCMD_ERR);
792 }
793
794 return (DCMD_OK);
795 }
796
797 typedef struct abuf_find_data {
798 dva_t dva;
799 mdb_ctf_id_t id;
800 } abuf_find_data_t;
801
802 /* ARGSUSED */
803 static int
abuf_find_cb(uintptr_t addr,const void * unknown,void * arg)804 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg)
805 {
806 abuf_find_data_t *data = arg;
807 dva_t dva;
808
809 if (GETMEMBID(addr, &data->id, b_dva, dva)) {
810 return (WALK_ERR);
811 }
812
813 if (dva.dva_word[0] == data->dva.dva_word[0] &&
814 dva.dva_word[1] == data->dva.dva_word[1]) {
815 mdb_printf("%#lr\n", addr);
816 }
817 return (WALK_NEXT);
818 }
819
820 /* ARGSUSED */
821 static int
abuf_find(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)822 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
823 {
824 abuf_find_data_t data;
825 GElf_Sym sym;
826 int i;
827 const char *syms[] = {
828 "ARC_mru",
829 "ARC_mru_ghost",
830 "ARC_mfu",
831 "ARC_mfu_ghost",
832 };
833
834 if (argc != 2)
835 return (DCMD_USAGE);
836
837 for (i = 0; i < 2; i ++) {
838 switch (argv[i].a_type) {
839 case MDB_TYPE_STRING:
840 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str);
841 break;
842 case MDB_TYPE_IMMEDIATE:
843 data.dva.dva_word[i] = argv[i].a_un.a_val;
844 break;
845 default:
846 return (DCMD_USAGE);
847 }
848 }
849
850 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) {
851 mdb_warn("couldn't find struct arc_buf_hdr");
852 return (DCMD_ERR);
853 }
854
855 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) {
856 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) {
857 mdb_warn("can't find symbol %s", syms[i]);
858 return (DCMD_ERR);
859 }
860
861 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) {
862 mdb_warn("can't walk %s", syms[i]);
863 return (DCMD_ERR);
864 }
865 }
866
867 return (DCMD_OK);
868 }
869
870
871 typedef struct dbgmsg_arg {
872 boolean_t da_verbose;
873 boolean_t da_address;
874 } dbgmsg_arg_t;
875
876 /* ARGSUSED */
877 static int
dbgmsg_cb(uintptr_t addr,const void * unknown,void * arg)878 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg)
879 {
880 static mdb_ctf_id_t id;
881 static boolean_t gotid;
882 static ulong_t off;
883
884 dbgmsg_arg_t *da = arg;
885 time_t timestamp;
886 char buf[1024];
887
888 if (!gotid) {
889 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) ==
890 -1) {
891 mdb_warn("couldn't find struct zfs_dbgmsg");
892 return (WALK_ERR);
893 }
894 gotid = TRUE;
895 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) {
896 mdb_warn("couldn't find zdm_msg");
897 return (WALK_ERR);
898 }
899 off /= 8;
900 }
901
902
903 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) {
904 return (WALK_ERR);
905 }
906
907 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) {
908 mdb_warn("failed to read zdm_msg at %p\n", addr + off);
909 return (DCMD_ERR);
910 }
911
912 if (da->da_address)
913 mdb_printf("%p ", addr);
914 if (da->da_verbose)
915 mdb_printf("%Y ", timestamp);
916
917 mdb_printf("%s\n", buf);
918
919 if (da->da_verbose)
920 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
921
922 return (WALK_NEXT);
923 }
924
925 /* ARGSUSED */
926 static int
dbgmsg(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)927 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
928 {
929 GElf_Sym sym;
930 dbgmsg_arg_t da = { 0 };
931
932 if (mdb_getopts(argc, argv,
933 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose,
934 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address,
935 NULL) != argc)
936 return (DCMD_USAGE);
937
938 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) {
939 mdb_warn("can't find zfs_dbgmsgs");
940 return (DCMD_ERR);
941 }
942
943 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) {
944 mdb_warn("can't walk zfs_dbgmsgs");
945 return (DCMD_ERR);
946 }
947
948 return (DCMD_OK);
949 }
950
951 /*ARGSUSED*/
952 static int
arc_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)953 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
954 {
955 kstat_named_t *stats;
956 GElf_Sym sym;
957 int nstats, i;
958 uint_t opt_a = FALSE;
959 uint_t opt_b = FALSE;
960 uint_t shift = 0;
961 const char *suffix;
962
963 static const char *bytestats[] = {
964 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size",
965 "arc_meta_used", "arc_meta_limit", "arc_meta_max",
966 "arc_meta_min", "hdr_size", "data_size", "metadata_size",
967 "other_size", "anon_size", "anon_evictable_data",
968 "anon_evictable_metadata", "mru_size", "mru_evictable_data",
969 "mru_evictable_metadata", "mru_ghost_size",
970 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata",
971 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata",
972 "mfu_ghost_size", "mfu_ghost_evictable_data",
973 "mfu_ghost_evictable_metadata", "evict_l2_cached",
974 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes",
975 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size",
976 NULL
977 };
978
979 static const char *extras[] = {
980 "arc_no_grow", "arc_tempreserve",
981 NULL
982 };
983
984 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) {
985 mdb_warn("failed to find 'arc_stats'");
986 return (DCMD_ERR);
987 }
988
989 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC);
990
991 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) {
992 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value);
993 return (DCMD_ERR);
994 }
995
996 nstats = sym.st_size / sizeof (kstat_named_t);
997
998 /* NB: -a / opt_a are ignored for backwards compatability */
999 if (mdb_getopts(argc, argv,
1000 'a', MDB_OPT_SETBITS, TRUE, &opt_a,
1001 'b', MDB_OPT_SETBITS, TRUE, &opt_b,
1002 'k', MDB_OPT_SETBITS, 10, &shift,
1003 'm', MDB_OPT_SETBITS, 20, &shift,
1004 'g', MDB_OPT_SETBITS, 30, &shift,
1005 NULL) != argc)
1006 return (DCMD_USAGE);
1007
1008 if (!opt_b && !shift)
1009 shift = 20;
1010
1011 switch (shift) {
1012 case 0:
1013 suffix = "B";
1014 break;
1015 case 10:
1016 suffix = "KB";
1017 break;
1018 case 20:
1019 suffix = "MB";
1020 break;
1021 case 30:
1022 suffix = "GB";
1023 break;
1024 default:
1025 suffix = "XX";
1026 }
1027
1028 for (i = 0; i < nstats; i++) {
1029 int j;
1030 boolean_t bytes = B_FALSE;
1031
1032 for (j = 0; bytestats[j]; j++) {
1033 if (strcmp(stats[i].name, bytestats[j]) == 0) {
1034 bytes = B_TRUE;
1035 break;
1036 }
1037 }
1038
1039 if (bytes) {
1040 mdb_printf("%-25s = %9llu %s\n", stats[i].name,
1041 stats[i].value.ui64 >> shift, suffix);
1042 } else {
1043 mdb_printf("%-25s = %9llu\n", stats[i].name,
1044 stats[i].value.ui64);
1045 }
1046 }
1047
1048 for (i = 0; extras[i]; i++) {
1049 uint64_t buf;
1050
1051 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) {
1052 mdb_warn("failed to find '%s'", extras[i]);
1053 return (DCMD_ERR);
1054 }
1055
1056 if (sym.st_size != sizeof (uint64_t) &&
1057 sym.st_size != sizeof (uint32_t)) {
1058 mdb_warn("expected scalar for variable '%s'\n",
1059 extras[i]);
1060 return (DCMD_ERR);
1061 }
1062
1063 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) {
1064 mdb_warn("couldn't read '%s'", extras[i]);
1065 return (DCMD_ERR);
1066 }
1067
1068 mdb_printf("%-25s = ", extras[i]);
1069
1070 /* NB: all the 64-bit extras happen to be byte counts */
1071 if (sym.st_size == sizeof (uint64_t))
1072 mdb_printf("%9llu %s\n", buf >> shift, suffix);
1073
1074 if (sym.st_size == sizeof (uint32_t))
1075 mdb_printf("%9d\n", *((uint32_t *)&buf));
1076 }
1077 return (DCMD_OK);
1078 }
1079
1080 typedef struct mdb_spa_print {
1081 pool_state_t spa_state;
1082 char spa_name[ZFS_MAX_DATASET_NAME_LEN];
1083 } mdb_spa_print_t;
1084
1085 /*
1086 * ::spa
1087 *
1088 * -c Print configuration information as well
1089 * -v Print vdev state
1090 * -e Print vdev error stats
1091 * -m Print vdev metaslab info
1092 * -M print vdev metaslab group info
1093 * -h Print histogram info (must be combined with -m or -M)
1094 *
1095 * Print a summarized spa_t. When given no arguments, prints out a table of all
1096 * active pools on the system.
1097 */
1098 /* ARGSUSED */
1099 static int
spa_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1100 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1101 {
1102 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED",
1103 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" };
1104 const char *state;
1105 int spa_flags = 0;
1106
1107 if (mdb_getopts(argc, argv,
1108 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags,
1109 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags,
1110 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1111 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1112 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1113 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1114 NULL) != argc)
1115 return (DCMD_USAGE);
1116
1117 if (!(flags & DCMD_ADDRSPEC)) {
1118 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) {
1119 mdb_warn("can't walk spa");
1120 return (DCMD_ERR);
1121 }
1122
1123 return (DCMD_OK);
1124 }
1125
1126 if (flags & DCMD_PIPE_OUT) {
1127 mdb_printf("%#lr\n", addr);
1128 return (DCMD_OK);
1129 }
1130
1131 if (DCMD_HDRSPEC(flags))
1132 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE",
1133 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME");
1134
1135 mdb_spa_print_t spa;
1136 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1)
1137 return (DCMD_ERR);
1138
1139 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL)
1140 state = "UNKNOWN";
1141 else
1142 state = statetab[spa.spa_state];
1143
1144 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name);
1145
1146 if (spa_flags & SPA_FLAG_CONFIG) {
1147 mdb_printf("\n");
1148 mdb_inc_indent(4);
1149 if (mdb_call_dcmd("spa_config", addr, flags, 0,
1150 NULL) != DCMD_OK)
1151 return (DCMD_ERR);
1152 mdb_dec_indent(4);
1153 }
1154
1155 if (spa_flags & SPA_FLAG_ALL_VDEV) {
1156 mdb_arg_t v;
1157 char opts[100] = "-";
1158 int args =
1159 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1;
1160
1161 if (spa_flags & SPA_FLAG_ERRORS)
1162 strcat(opts, "e");
1163 if (spa_flags & SPA_FLAG_METASLABS)
1164 strcat(opts, "m");
1165 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1166 strcat(opts, "M");
1167 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1168 strcat(opts, "h");
1169
1170 v.a_type = MDB_TYPE_STRING;
1171 v.a_un.a_str = opts;
1172
1173 mdb_printf("\n");
1174 mdb_inc_indent(4);
1175 if (mdb_call_dcmd("spa_vdevs", addr, flags, args,
1176 &v) != DCMD_OK)
1177 return (DCMD_ERR);
1178 mdb_dec_indent(4);
1179 }
1180
1181 return (DCMD_OK);
1182 }
1183
1184 typedef struct mdb_spa_config_spa {
1185 uintptr_t spa_config;
1186 } mdb_spa_config_spa_t;
1187
1188 /*
1189 * ::spa_config
1190 *
1191 * Given a spa_t, print the configuration information stored in spa_config.
1192 * Since it's just an nvlist, format it as an indented list of name=value pairs.
1193 * We simply read the value of spa_config and pass off to ::nvlist.
1194 */
1195 /* ARGSUSED */
1196 static int
spa_print_config(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1197 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1198 {
1199 mdb_spa_config_spa_t spa;
1200
1201 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1202 return (DCMD_USAGE);
1203
1204 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t",
1205 addr, 0) == -1)
1206 return (DCMD_ERR);
1207
1208 if (spa.spa_config == 0) {
1209 mdb_printf("(none)\n");
1210 return (DCMD_OK);
1211 }
1212
1213 return (mdb_call_dcmd("nvlist", spa.spa_config, flags,
1214 0, NULL));
1215 }
1216
1217 const char histo_stars[] = "****************************************";
1218 const int histo_width = sizeof (histo_stars) - 1;
1219
1220 static void
dump_histogram(const uint64_t * histo,int size,int offset)1221 dump_histogram(const uint64_t *histo, int size, int offset)
1222 {
1223 int i;
1224 int minidx = size - 1;
1225 int maxidx = 0;
1226 uint64_t max = 0;
1227
1228 for (i = 0; i < size; i++) {
1229 if (histo[i] > max)
1230 max = histo[i];
1231 if (histo[i] > 0 && i > maxidx)
1232 maxidx = i;
1233 if (histo[i] > 0 && i < minidx)
1234 minidx = i;
1235 }
1236
1237 if (max < histo_width)
1238 max = histo_width;
1239
1240 for (i = minidx; i <= maxidx; i++) {
1241 mdb_printf("%3u: %6llu %s\n",
1242 i + offset, (u_longlong_t)histo[i],
1243 &histo_stars[(max - histo[i]) * histo_width / max]);
1244 }
1245 }
1246
1247 typedef struct mdb_range_tree {
1248 uint64_t rt_space;
1249 } mdb_range_tree_t;
1250
1251 typedef struct mdb_metaslab_group {
1252 uint64_t mg_fragmentation;
1253 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE];
1254 } mdb_metaslab_group_t;
1255
1256 typedef struct mdb_metaslab {
1257 uint64_t ms_id;
1258 uint64_t ms_start;
1259 uint64_t ms_size;
1260 uint64_t ms_fragmentation;
1261 uintptr_t ms_alloctree[TXG_SIZE];
1262 uintptr_t ms_freetree[TXG_SIZE];
1263 uintptr_t ms_tree;
1264 uintptr_t ms_sm;
1265 } mdb_metaslab_t;
1266
1267 typedef struct mdb_space_map_phys_t {
1268 uint64_t smp_alloc;
1269 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE];
1270 } mdb_space_map_phys_t;
1271
1272 typedef struct mdb_space_map {
1273 uint64_t sm_size;
1274 uint8_t sm_shift;
1275 uint64_t sm_alloc;
1276 uintptr_t sm_phys;
1277 } mdb_space_map_t;
1278
1279 typedef struct mdb_vdev {
1280 uintptr_t vdev_ms;
1281 uint64_t vdev_ms_count;
1282 vdev_stat_t vdev_stat;
1283 } mdb_vdev_t;
1284
1285 static int
metaslab_stats(uintptr_t addr,int spa_flags)1286 metaslab_stats(uintptr_t addr, int spa_flags)
1287 {
1288 mdb_vdev_t vdev;
1289 uintptr_t *vdev_ms;
1290
1291 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t",
1292 (uintptr_t)addr, 0) == -1) {
1293 mdb_warn("failed to read vdev at %p\n", addr);
1294 return (DCMD_ERR);
1295 }
1296
1297 mdb_inc_indent(4);
1298 mdb_printf("%<u>%-?s %6s %20s %10s %9s%</u>\n", "ADDR", "ID",
1299 "OFFSET", "FREE", "FRAGMENTATION");
1300
1301 vdev_ms = mdb_alloc(vdev.vdev_ms_count * sizeof (void *),
1302 UM_SLEEP | UM_GC);
1303 if (mdb_vread(vdev_ms, vdev.vdev_ms_count * sizeof (void *),
1304 (uintptr_t)vdev.vdev_ms) == -1) {
1305 mdb_warn("failed to read vdev_ms at %p\n", vdev.vdev_ms);
1306 return (DCMD_ERR);
1307 }
1308
1309 for (int m = 0; m < vdev.vdev_ms_count; m++) {
1310 mdb_metaslab_t ms;
1311 mdb_space_map_t sm = { 0 };
1312 char free[NICENUM_BUFLEN];
1313
1314 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1315 (uintptr_t)vdev_ms[m], 0) == -1)
1316 return (DCMD_ERR);
1317
1318 if (ms.ms_sm != NULL &&
1319 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t",
1320 ms.ms_sm, 0) == -1)
1321 return (DCMD_ERR);
1322
1323 mdb_nicenum(ms.ms_size - sm.sm_alloc, free);
1324
1325 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id,
1326 ms.ms_start, free);
1327 if (ms.ms_fragmentation == ZFS_FRAG_INVALID)
1328 mdb_printf("%9s\n", "-");
1329 else
1330 mdb_printf("%9llu%%\n", ms.ms_fragmentation);
1331
1332 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != NULL) {
1333 mdb_space_map_phys_t smp;
1334
1335 if (sm.sm_phys == NULL)
1336 continue;
1337
1338 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1339 "mdb_space_map_phys_t", sm.sm_phys, 0);
1340
1341 dump_histogram(smp.smp_histogram,
1342 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift);
1343 }
1344 }
1345 mdb_dec_indent(4);
1346 return (DCMD_OK);
1347 }
1348
1349 static int
metaslab_group_stats(uintptr_t addr,int spa_flags)1350 metaslab_group_stats(uintptr_t addr, int spa_flags)
1351 {
1352 mdb_metaslab_group_t mg;
1353 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t",
1354 (uintptr_t)addr, 0) == -1) {
1355 mdb_warn("failed to read vdev_mg at %p\n", addr);
1356 return (DCMD_ERR);
1357 }
1358
1359 mdb_inc_indent(4);
1360 mdb_printf("%<u>%-?s %15s%</u>\n", "ADDR", "FRAGMENTATION");
1361 if (mg.mg_fragmentation == ZFS_FRAG_INVALID)
1362 mdb_printf("%0?p %15s\n", addr, "-");
1363 else
1364 mdb_printf("%0?p %15llu%%\n", addr, mg.mg_fragmentation);
1365
1366 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1367 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1368 mdb_dec_indent(4);
1369 return (DCMD_OK);
1370 }
1371
1372 /*
1373 * ::vdev
1374 *
1375 * Print out a summarized vdev_t, in the following form:
1376 *
1377 * ADDR STATE AUX DESC
1378 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0
1379 *
1380 * If '-r' is specified, recursively visit all children.
1381 *
1382 * With '-e', the statistics associated with the vdev are printed as well.
1383 */
1384 static int
do_print_vdev(uintptr_t addr,int flags,int depth,boolean_t recursive,int spa_flags)1385 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive,
1386 int spa_flags)
1387 {
1388 vdev_t vdev;
1389 char desc[MAXNAMELEN];
1390 int c, children;
1391 uintptr_t *child;
1392 const char *state, *aux;
1393
1394 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) {
1395 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr);
1396 return (DCMD_ERR);
1397 }
1398
1399 if (flags & DCMD_PIPE_OUT) {
1400 mdb_printf("%#lr\n", addr);
1401 } else {
1402 if (vdev.vdev_path != NULL) {
1403 if (mdb_readstr(desc, sizeof (desc),
1404 (uintptr_t)vdev.vdev_path) == -1) {
1405 mdb_warn("failed to read vdev_path at %p\n",
1406 vdev.vdev_path);
1407 return (DCMD_ERR);
1408 }
1409 } else if (vdev.vdev_ops != NULL) {
1410 vdev_ops_t ops;
1411 if (mdb_vread(&ops, sizeof (ops),
1412 (uintptr_t)vdev.vdev_ops) == -1) {
1413 mdb_warn("failed to read vdev_ops at %p\n",
1414 vdev.vdev_ops);
1415 return (DCMD_ERR);
1416 }
1417 (void) strcpy(desc, ops.vdev_op_type);
1418 } else {
1419 (void) strcpy(desc, "<unknown>");
1420 }
1421
1422 if (depth == 0 && DCMD_HDRSPEC(flags))
1423 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n",
1424 "ADDR", "STATE", "AUX",
1425 sizeof (uintptr_t) == 4 ? 43 : 35,
1426 "DESCRIPTION");
1427
1428 mdb_printf("%0?p ", addr);
1429
1430 switch (vdev.vdev_state) {
1431 case VDEV_STATE_CLOSED:
1432 state = "CLOSED";
1433 break;
1434 case VDEV_STATE_OFFLINE:
1435 state = "OFFLINE";
1436 break;
1437 case VDEV_STATE_CANT_OPEN:
1438 state = "CANT_OPEN";
1439 break;
1440 case VDEV_STATE_DEGRADED:
1441 state = "DEGRADED";
1442 break;
1443 case VDEV_STATE_HEALTHY:
1444 state = "HEALTHY";
1445 break;
1446 case VDEV_STATE_REMOVED:
1447 state = "REMOVED";
1448 break;
1449 case VDEV_STATE_FAULTED:
1450 state = "FAULTED";
1451 break;
1452 default:
1453 state = "UNKNOWN";
1454 break;
1455 }
1456
1457 switch (vdev.vdev_stat.vs_aux) {
1458 case VDEV_AUX_NONE:
1459 aux = "-";
1460 break;
1461 case VDEV_AUX_OPEN_FAILED:
1462 aux = "OPEN_FAILED";
1463 break;
1464 case VDEV_AUX_CORRUPT_DATA:
1465 aux = "CORRUPT_DATA";
1466 break;
1467 case VDEV_AUX_NO_REPLICAS:
1468 aux = "NO_REPLICAS";
1469 break;
1470 case VDEV_AUX_BAD_GUID_SUM:
1471 aux = "BAD_GUID_SUM";
1472 break;
1473 case VDEV_AUX_TOO_SMALL:
1474 aux = "TOO_SMALL";
1475 break;
1476 case VDEV_AUX_BAD_LABEL:
1477 aux = "BAD_LABEL";
1478 break;
1479 case VDEV_AUX_VERSION_NEWER:
1480 aux = "VERS_NEWER";
1481 break;
1482 case VDEV_AUX_VERSION_OLDER:
1483 aux = "VERS_OLDER";
1484 break;
1485 case VDEV_AUX_UNSUP_FEAT:
1486 aux = "UNSUP_FEAT";
1487 break;
1488 case VDEV_AUX_SPARED:
1489 aux = "SPARED";
1490 break;
1491 case VDEV_AUX_ERR_EXCEEDED:
1492 aux = "ERR_EXCEEDED";
1493 break;
1494 case VDEV_AUX_IO_FAILURE:
1495 aux = "IO_FAILURE";
1496 break;
1497 case VDEV_AUX_BAD_LOG:
1498 aux = "BAD_LOG";
1499 break;
1500 case VDEV_AUX_EXTERNAL:
1501 aux = "EXTERNAL";
1502 break;
1503 case VDEV_AUX_SPLIT_POOL:
1504 aux = "SPLIT_POOL";
1505 break;
1506 default:
1507 aux = "UNKNOWN";
1508 break;
1509 }
1510
1511 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc);
1512
1513 if (spa_flags & SPA_FLAG_ERRORS) {
1514 vdev_stat_t *vs = &vdev.vdev_stat;
1515 int i;
1516
1517 mdb_inc_indent(4);
1518 mdb_printf("\n");
1519 mdb_printf("%<u> %12s %12s %12s %12s "
1520 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM",
1521 "IOCTL");
1522 mdb_printf("OPS ");
1523 for (i = 1; i < ZIO_TYPES; i++)
1524 mdb_printf("%11#llx%s", vs->vs_ops[i],
1525 i == ZIO_TYPES - 1 ? "" : " ");
1526 mdb_printf("\n");
1527 mdb_printf("BYTES ");
1528 for (i = 1; i < ZIO_TYPES; i++)
1529 mdb_printf("%11#llx%s", vs->vs_bytes[i],
1530 i == ZIO_TYPES - 1 ? "" : " ");
1531
1532
1533 mdb_printf("\n");
1534 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors);
1535 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors);
1536 mdb_printf("ECKSUM %10#llx\n",
1537 vs->vs_checksum_errors);
1538 mdb_dec_indent(4);
1539 mdb_printf("\n");
1540 }
1541
1542 if (spa_flags & SPA_FLAG_METASLAB_GROUPS &&
1543 vdev.vdev_mg != NULL) {
1544 metaslab_group_stats((uintptr_t)vdev.vdev_mg,
1545 spa_flags);
1546 }
1547 if (spa_flags & SPA_FLAG_METASLABS && vdev.vdev_ms != NULL) {
1548 metaslab_stats((uintptr_t)addr, spa_flags);
1549 }
1550 }
1551
1552 children = vdev.vdev_children;
1553
1554 if (children == 0 || !recursive)
1555 return (DCMD_OK);
1556
1557 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC);
1558 if (mdb_vread(child, children * sizeof (void *),
1559 (uintptr_t)vdev.vdev_child) == -1) {
1560 mdb_warn("failed to read vdev children at %p", vdev.vdev_child);
1561 return (DCMD_ERR);
1562 }
1563
1564 for (c = 0; c < children; c++) {
1565 if (do_print_vdev(child[c], flags, depth + 2, recursive,
1566 spa_flags)) {
1567 return (DCMD_ERR);
1568 }
1569 }
1570
1571 return (DCMD_OK);
1572 }
1573
1574 static int
vdev_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1575 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1576 {
1577 uint64_t depth = 0;
1578 boolean_t recursive = B_FALSE;
1579 int spa_flags = 0;
1580
1581 if (mdb_getopts(argc, argv,
1582 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1583 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1584 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1585 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1586 'r', MDB_OPT_SETBITS, TRUE, &recursive,
1587 'd', MDB_OPT_UINT64, &depth, NULL) != argc)
1588 return (DCMD_USAGE);
1589
1590 if (!(flags & DCMD_ADDRSPEC)) {
1591 mdb_warn("no vdev_t address given\n");
1592 return (DCMD_ERR);
1593 }
1594
1595 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags));
1596 }
1597
1598 typedef struct metaslab_walk_data {
1599 uint64_t mw_numvdevs;
1600 uintptr_t *mw_vdevs;
1601 int mw_curvdev;
1602 uint64_t mw_nummss;
1603 uintptr_t *mw_mss;
1604 int mw_curms;
1605 } metaslab_walk_data_t;
1606
1607 static int
metaslab_walk_step(mdb_walk_state_t * wsp)1608 metaslab_walk_step(mdb_walk_state_t *wsp)
1609 {
1610 metaslab_walk_data_t *mw = wsp->walk_data;
1611 metaslab_t ms;
1612 uintptr_t msp;
1613
1614 if (mw->mw_curvdev >= mw->mw_numvdevs)
1615 return (WALK_DONE);
1616
1617 if (mw->mw_mss == NULL) {
1618 uintptr_t mssp;
1619 uintptr_t vdevp;
1620
1621 ASSERT(mw->mw_curms == 0);
1622 ASSERT(mw->mw_nummss == 0);
1623
1624 vdevp = mw->mw_vdevs[mw->mw_curvdev];
1625 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) ||
1626 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) {
1627 return (WALK_ERR);
1628 }
1629
1630 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*),
1631 UM_SLEEP | UM_GC);
1632 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*),
1633 mssp) == -1) {
1634 mdb_warn("failed to read vdev_ms at %p", mssp);
1635 return (WALK_ERR);
1636 }
1637 }
1638
1639 if (mw->mw_curms >= mw->mw_nummss) {
1640 mw->mw_mss = NULL;
1641 mw->mw_curms = 0;
1642 mw->mw_nummss = 0;
1643 mw->mw_curvdev++;
1644 return (WALK_NEXT);
1645 }
1646
1647 msp = mw->mw_mss[mw->mw_curms];
1648 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) {
1649 mdb_warn("failed to read metaslab_t at %p", msp);
1650 return (WALK_ERR);
1651 }
1652
1653 mw->mw_curms++;
1654
1655 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata));
1656 }
1657
1658 /* ARGSUSED */
1659 static int
metaslab_walk_init(mdb_walk_state_t * wsp)1660 metaslab_walk_init(mdb_walk_state_t *wsp)
1661 {
1662 metaslab_walk_data_t *mw;
1663 uintptr_t root_vdevp;
1664 uintptr_t childp;
1665
1666 if (wsp->walk_addr == NULL) {
1667 mdb_warn("must supply address of spa_t\n");
1668 return (WALK_ERR);
1669 }
1670
1671 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC);
1672
1673 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) ||
1674 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) ||
1675 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) {
1676 return (DCMD_ERR);
1677 }
1678
1679 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *),
1680 UM_SLEEP | UM_GC);
1681 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *),
1682 childp) == -1) {
1683 mdb_warn("failed to read root vdev children at %p", childp);
1684 return (DCMD_ERR);
1685 }
1686
1687 wsp->walk_data = mw;
1688
1689 return (WALK_NEXT);
1690 }
1691
1692 typedef struct mdb_spa {
1693 uintptr_t spa_dsl_pool;
1694 uintptr_t spa_root_vdev;
1695 } mdb_spa_t;
1696
1697 typedef struct mdb_dsl_pool {
1698 uintptr_t dp_root_dir;
1699 } mdb_dsl_pool_t;
1700
1701 typedef struct mdb_dsl_dir {
1702 uintptr_t dd_dbuf;
1703 int64_t dd_space_towrite[TXG_SIZE];
1704 } mdb_dsl_dir_t;
1705
1706 typedef struct mdb_dsl_dir_phys {
1707 uint64_t dd_used_bytes;
1708 uint64_t dd_compressed_bytes;
1709 uint64_t dd_uncompressed_bytes;
1710 } mdb_dsl_dir_phys_t;
1711
1712 typedef struct space_data {
1713 uint64_t ms_alloctree[TXG_SIZE];
1714 uint64_t ms_freetree[TXG_SIZE];
1715 uint64_t ms_tree;
1716 uint64_t avail;
1717 uint64_t nowavail;
1718 } space_data_t;
1719
1720 /* ARGSUSED */
1721 static int
space_cb(uintptr_t addr,const void * unknown,void * arg)1722 space_cb(uintptr_t addr, const void *unknown, void *arg)
1723 {
1724 space_data_t *sd = arg;
1725 mdb_metaslab_t ms;
1726 mdb_range_tree_t rt;
1727 mdb_space_map_t sm = { 0 };
1728 mdb_space_map_phys_t smp = { 0 };
1729 int i;
1730
1731 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1732 addr, 0) == -1)
1733 return (WALK_ERR);
1734
1735 for (i = 0; i < TXG_SIZE; i++) {
1736 if (mdb_ctf_vread(&rt, "range_tree_t",
1737 "mdb_range_tree_t", ms.ms_alloctree[i], 0) == -1)
1738 return (WALK_ERR);
1739
1740 sd->ms_alloctree[i] += rt.rt_space;
1741
1742 if (mdb_ctf_vread(&rt, "range_tree_t",
1743 "mdb_range_tree_t", ms.ms_freetree[i], 0) == -1)
1744 return (WALK_ERR);
1745
1746 sd->ms_freetree[i] += rt.rt_space;
1747 }
1748
1749 if (mdb_ctf_vread(&rt, "range_tree_t",
1750 "mdb_range_tree_t", ms.ms_tree, 0) == -1)
1751 return (WALK_ERR);
1752
1753 if (ms.ms_sm != NULL &&
1754 mdb_ctf_vread(&sm, "space_map_t",
1755 "mdb_space_map_t", ms.ms_sm, 0) == -1)
1756 return (WALK_ERR);
1757
1758 if (sm.sm_phys != NULL) {
1759 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1760 "mdb_space_map_phys_t", sm.sm_phys, 0);
1761 }
1762
1763 sd->ms_tree += rt.rt_space;
1764 sd->avail += sm.sm_size - sm.sm_alloc;
1765 sd->nowavail += sm.sm_size - smp.smp_alloc;
1766
1767 return (WALK_NEXT);
1768 }
1769
1770 /*
1771 * ::spa_space [-b]
1772 *
1773 * Given a spa_t, print out it's on-disk space usage and in-core
1774 * estimates of future usage. If -b is given, print space in bytes.
1775 * Otherwise print in megabytes.
1776 */
1777 /* ARGSUSED */
1778 static int
spa_space(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1779 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1780 {
1781 mdb_spa_t spa;
1782 mdb_dsl_pool_t dp;
1783 mdb_dsl_dir_t dd;
1784 mdb_dmu_buf_impl_t db;
1785 mdb_dsl_dir_phys_t dsp;
1786 space_data_t sd;
1787 int shift = 20;
1788 char *suffix = "M";
1789 int bytes = B_FALSE;
1790
1791 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) !=
1792 argc)
1793 return (DCMD_USAGE);
1794 if (!(flags & DCMD_ADDRSPEC))
1795 return (DCMD_USAGE);
1796
1797 if (bytes) {
1798 shift = 0;
1799 suffix = "";
1800 }
1801
1802 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t",
1803 addr, 0) == -1 ||
1804 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t",
1805 spa.spa_dsl_pool, 0) == -1 ||
1806 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t",
1807 dp.dp_root_dir, 0) == -1 ||
1808 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
1809 dd.dd_dbuf, 0) == -1 ||
1810 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys",
1811 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) {
1812 return (DCMD_ERR);
1813 }
1814
1815 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n",
1816 dd.dd_space_towrite[0] >> shift, suffix,
1817 dd.dd_space_towrite[1] >> shift, suffix,
1818 dd.dd_space_towrite[2] >> shift, suffix,
1819 dd.dd_space_towrite[3] >> shift, suffix);
1820
1821 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n",
1822 dsp.dd_used_bytes >> shift, suffix);
1823 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n",
1824 dsp.dd_compressed_bytes >> shift, suffix);
1825 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n",
1826 dsp.dd_uncompressed_bytes >> shift, suffix);
1827
1828 bzero(&sd, sizeof (sd));
1829 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) {
1830 mdb_warn("can't walk metaslabs");
1831 return (DCMD_ERR);
1832 }
1833
1834 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n",
1835 sd.ms_alloctree[0] >> shift, suffix,
1836 sd.ms_alloctree[1] >> shift, suffix,
1837 sd.ms_alloctree[2] >> shift, suffix,
1838 sd.ms_alloctree[3] >> shift, suffix);
1839 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n",
1840 sd.ms_freetree[0] >> shift, suffix,
1841 sd.ms_freetree[1] >> shift, suffix,
1842 sd.ms_freetree[2] >> shift, suffix,
1843 sd.ms_freetree[3] >> shift, suffix);
1844 mdb_printf("ms_tree = %llu%s\n", sd.ms_tree >> shift, suffix);
1845 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix);
1846 mdb_printf("current syncing avail = %llu%s\n",
1847 sd.nowavail >> shift, suffix);
1848
1849 return (DCMD_OK);
1850 }
1851
1852 typedef struct mdb_spa_aux_vdev {
1853 int sav_count;
1854 uintptr_t sav_vdevs;
1855 } mdb_spa_aux_vdev_t;
1856
1857 typedef struct mdb_spa_vdevs {
1858 uintptr_t spa_root_vdev;
1859 mdb_spa_aux_vdev_t spa_l2cache;
1860 mdb_spa_aux_vdev_t spa_spares;
1861 } mdb_spa_vdevs_t;
1862
1863 static int
spa_print_aux(mdb_spa_aux_vdev_t * sav,uint_t flags,mdb_arg_t * v,const char * name)1864 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v,
1865 const char *name)
1866 {
1867 uintptr_t *aux;
1868 size_t len;
1869 int ret, i;
1870
1871 /*
1872 * Iterate over aux vdevs and print those out as well. This is a
1873 * little annoying because we don't have a root vdev to pass to ::vdev.
1874 * Instead, we print a single line and then call it for each child
1875 * vdev.
1876 */
1877 if (sav->sav_count != 0) {
1878 v[1].a_type = MDB_TYPE_STRING;
1879 v[1].a_un.a_str = "-d";
1880 v[2].a_type = MDB_TYPE_IMMEDIATE;
1881 v[2].a_un.a_val = 2;
1882
1883 len = sav->sav_count * sizeof (uintptr_t);
1884 aux = mdb_alloc(len, UM_SLEEP);
1885 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) {
1886 mdb_free(aux, len);
1887 mdb_warn("failed to read l2cache vdevs at %p",
1888 sav->sav_vdevs);
1889 return (DCMD_ERR);
1890 }
1891
1892 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name);
1893
1894 for (i = 0; i < sav->sav_count; i++) {
1895 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v);
1896 if (ret != DCMD_OK) {
1897 mdb_free(aux, len);
1898 return (ret);
1899 }
1900 }
1901
1902 mdb_free(aux, len);
1903 }
1904
1905 return (0);
1906 }
1907
1908 /*
1909 * ::spa_vdevs
1910 *
1911 * -e Include error stats
1912 * -m Include metaslab information
1913 * -M Include metaslab group information
1914 * -h Include histogram information (requires -m or -M)
1915 *
1916 * Print out a summarized list of vdevs for the given spa_t.
1917 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as
1918 * iterating over the cache devices.
1919 */
1920 /* ARGSUSED */
1921 static int
spa_vdevs(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1922 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1923 {
1924 mdb_arg_t v[3];
1925 int ret;
1926 char opts[100] = "-r";
1927 int spa_flags = 0;
1928
1929 if (mdb_getopts(argc, argv,
1930 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1931 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1932 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1933 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1934 NULL) != argc)
1935 return (DCMD_USAGE);
1936
1937 if (!(flags & DCMD_ADDRSPEC))
1938 return (DCMD_USAGE);
1939
1940 mdb_spa_vdevs_t spa;
1941 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1)
1942 return (DCMD_ERR);
1943
1944 /*
1945 * Unitialized spa_t structures can have a NULL root vdev.
1946 */
1947 if (spa.spa_root_vdev == NULL) {
1948 mdb_printf("no associated vdevs\n");
1949 return (DCMD_OK);
1950 }
1951
1952 if (spa_flags & SPA_FLAG_ERRORS)
1953 strcat(opts, "e");
1954 if (spa_flags & SPA_FLAG_METASLABS)
1955 strcat(opts, "m");
1956 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1957 strcat(opts, "M");
1958 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1959 strcat(opts, "h");
1960
1961 v[0].a_type = MDB_TYPE_STRING;
1962 v[0].a_un.a_str = opts;
1963
1964 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev,
1965 flags, 1, v);
1966 if (ret != DCMD_OK)
1967 return (ret);
1968
1969 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 ||
1970 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0)
1971 return (DCMD_ERR);
1972
1973 return (DCMD_OK);
1974 }
1975
1976 /*
1977 * ::zio
1978 *
1979 * Print a summary of zio_t and all its children. This is intended to display a
1980 * zio tree, and hence we only pick the most important pieces of information for
1981 * the main summary. More detailed information can always be found by doing a
1982 * '::print zio' on the underlying zio_t. The columns we display are:
1983 *
1984 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED
1985 *
1986 * The 'address' column is indented by one space for each depth level as we
1987 * descend down the tree.
1988 */
1989
1990 #define ZIO_MAXINDENT 7
1991 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT)
1992 #define ZIO_WALK_SELF 0
1993 #define ZIO_WALK_CHILD 1
1994 #define ZIO_WALK_PARENT 2
1995
1996 typedef struct zio_print_args {
1997 int zpa_current_depth;
1998 int zpa_min_depth;
1999 int zpa_max_depth;
2000 int zpa_type;
2001 uint_t zpa_flags;
2002 } zio_print_args_t;
2003
2004 typedef struct mdb_zio {
2005 enum zio_type io_type;
2006 enum zio_stage io_stage;
2007 uintptr_t io_waiter;
2008 uintptr_t io_spa;
2009 struct {
2010 struct {
2011 uintptr_t list_next;
2012 } list_head;
2013 } io_parent_list;
2014 int io_error;
2015 } mdb_zio_t;
2016
2017 typedef struct mdb_zio_timestamp {
2018 hrtime_t io_timestamp;
2019 } mdb_zio_timestamp_t;
2020
2021 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg);
2022
2023 static int
zio_print_cb(uintptr_t addr,zio_print_args_t * zpa)2024 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa)
2025 {
2026 mdb_ctf_id_t type_enum, stage_enum;
2027 int indent = zpa->zpa_current_depth;
2028 const char *type, *stage;
2029 uintptr_t laddr;
2030 mdb_zio_t zio;
2031 mdb_zio_timestamp_t zio_timestamp = { 0 };
2032
2033 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1)
2034 return (WALK_ERR);
2035 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio",
2036 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET);
2037
2038 if (indent > ZIO_MAXINDENT)
2039 indent = ZIO_MAXINDENT;
2040
2041 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 ||
2042 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) {
2043 mdb_warn("failed to lookup zio enums");
2044 return (WALK_ERR);
2045 }
2046
2047 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL)
2048 type += sizeof ("ZIO_TYPE_") - 1;
2049 else
2050 type = "?";
2051
2052 if (zio.io_error == 0) {
2053 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage);
2054 if (stage != NULL)
2055 stage += sizeof ("ZIO_STAGE_") - 1;
2056 else
2057 stage = "?";
2058 } else {
2059 stage = "FAILED";
2060 }
2061
2062 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) {
2063 if (zpa->zpa_flags & DCMD_PIPE_OUT) {
2064 mdb_printf("%?p\n", addr);
2065 } else {
2066 mdb_printf("%*s%-*p %-5s %-16s ", indent, "",
2067 ZIO_MAXWIDTH - indent, addr, type, stage);
2068 if (zio.io_waiter != 0)
2069 mdb_printf("%-16lx ", zio.io_waiter);
2070 else
2071 mdb_printf("%-16s ", "-");
2072 #ifdef _KERNEL
2073 if (zio_timestamp.io_timestamp != 0) {
2074 mdb_printf("%llums", (mdb_gethrtime() -
2075 zio_timestamp.io_timestamp) /
2076 1000000);
2077 } else {
2078 mdb_printf("%-12s ", "-");
2079 }
2080 #else
2081 mdb_printf("%-12s ", "-");
2082 #endif
2083 mdb_printf("\n");
2084 }
2085 }
2086
2087 if (zpa->zpa_current_depth >= zpa->zpa_max_depth)
2088 return (WALK_NEXT);
2089
2090 if (zpa->zpa_type == ZIO_WALK_PARENT)
2091 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2092 "io_parent_list");
2093 else
2094 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2095 "io_child_list");
2096
2097 zpa->zpa_current_depth++;
2098 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) {
2099 mdb_warn("failed to walk zio_t children at %p\n", laddr);
2100 return (WALK_ERR);
2101 }
2102 zpa->zpa_current_depth--;
2103
2104 return (WALK_NEXT);
2105 }
2106
2107 /* ARGSUSED */
2108 static int
zio_child_cb(uintptr_t addr,const void * unknown,void * arg)2109 zio_child_cb(uintptr_t addr, const void *unknown, void *arg)
2110 {
2111 zio_link_t zl;
2112 uintptr_t ziop;
2113 zio_print_args_t *zpa = arg;
2114
2115 if (mdb_vread(&zl, sizeof (zl), addr) == -1) {
2116 mdb_warn("failed to read zio_link_t at %p", addr);
2117 return (WALK_ERR);
2118 }
2119
2120 if (zpa->zpa_type == ZIO_WALK_PARENT)
2121 ziop = (uintptr_t)zl.zl_parent;
2122 else
2123 ziop = (uintptr_t)zl.zl_child;
2124
2125 return (zio_print_cb(ziop, zpa));
2126 }
2127
2128 /* ARGSUSED */
2129 static int
zio_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2130 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2131 {
2132 zio_print_args_t zpa = { 0 };
2133
2134 if (!(flags & DCMD_ADDRSPEC))
2135 return (DCMD_USAGE);
2136
2137 if (mdb_getopts(argc, argv,
2138 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth,
2139 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type,
2140 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type,
2141 NULL) != argc)
2142 return (DCMD_USAGE);
2143
2144 zpa.zpa_flags = flags;
2145 if (zpa.zpa_max_depth != 0) {
2146 if (zpa.zpa_type == ZIO_WALK_SELF)
2147 zpa.zpa_type = ZIO_WALK_CHILD;
2148 } else if (zpa.zpa_type != ZIO_WALK_SELF) {
2149 zpa.zpa_min_depth = 1;
2150 zpa.zpa_max_depth = 1;
2151 }
2152
2153 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) {
2154 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n",
2155 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER",
2156 "TIME_ELAPSED");
2157 }
2158
2159 if (zio_print_cb(addr, &zpa) != WALK_NEXT)
2160 return (DCMD_ERR);
2161
2162 return (DCMD_OK);
2163 }
2164
2165 /*
2166 * [addr]::zio_state
2167 *
2168 * Print a summary of all zio_t structures on the system, or for a particular
2169 * pool. This is equivalent to '::walk zio_root | ::zio'.
2170 */
2171 /*ARGSUSED*/
2172 static int
zio_state(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2173 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2174 {
2175 /*
2176 * MDB will remember the last address of the pipeline, so if we don't
2177 * zero this we'll end up trying to walk zio structures for a
2178 * non-existent spa_t.
2179 */
2180 if (!(flags & DCMD_ADDRSPEC))
2181 addr = 0;
2182
2183 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr));
2184 }
2185
2186 typedef struct txg_list_walk_data {
2187 uintptr_t lw_head[TXG_SIZE];
2188 int lw_txgoff;
2189 int lw_maxoff;
2190 size_t lw_offset;
2191 void *lw_obj;
2192 } txg_list_walk_data_t;
2193
2194 static int
txg_list_walk_init_common(mdb_walk_state_t * wsp,int txg,int maxoff)2195 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff)
2196 {
2197 txg_list_walk_data_t *lwd;
2198 txg_list_t list;
2199 int i;
2200
2201 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC);
2202 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) {
2203 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr);
2204 return (WALK_ERR);
2205 }
2206
2207 for (i = 0; i < TXG_SIZE; i++)
2208 lwd->lw_head[i] = (uintptr_t)list.tl_head[i];
2209 lwd->lw_offset = list.tl_offset;
2210 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t),
2211 UM_SLEEP | UM_GC);
2212 lwd->lw_txgoff = txg;
2213 lwd->lw_maxoff = maxoff;
2214
2215 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2216 wsp->walk_data = lwd;
2217
2218 return (WALK_NEXT);
2219 }
2220
2221 static int
txg_list_walk_init(mdb_walk_state_t * wsp)2222 txg_list_walk_init(mdb_walk_state_t *wsp)
2223 {
2224 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1));
2225 }
2226
2227 static int
txg_list0_walk_init(mdb_walk_state_t * wsp)2228 txg_list0_walk_init(mdb_walk_state_t *wsp)
2229 {
2230 return (txg_list_walk_init_common(wsp, 0, 0));
2231 }
2232
2233 static int
txg_list1_walk_init(mdb_walk_state_t * wsp)2234 txg_list1_walk_init(mdb_walk_state_t *wsp)
2235 {
2236 return (txg_list_walk_init_common(wsp, 1, 1));
2237 }
2238
2239 static int
txg_list2_walk_init(mdb_walk_state_t * wsp)2240 txg_list2_walk_init(mdb_walk_state_t *wsp)
2241 {
2242 return (txg_list_walk_init_common(wsp, 2, 2));
2243 }
2244
2245 static int
txg_list3_walk_init(mdb_walk_state_t * wsp)2246 txg_list3_walk_init(mdb_walk_state_t *wsp)
2247 {
2248 return (txg_list_walk_init_common(wsp, 3, 3));
2249 }
2250
2251 static int
txg_list_walk_step(mdb_walk_state_t * wsp)2252 txg_list_walk_step(mdb_walk_state_t *wsp)
2253 {
2254 txg_list_walk_data_t *lwd = wsp->walk_data;
2255 uintptr_t addr;
2256 txg_node_t *node;
2257 int status;
2258
2259 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) {
2260 lwd->lw_txgoff++;
2261 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2262 }
2263
2264 if (wsp->walk_addr == NULL)
2265 return (WALK_DONE);
2266
2267 addr = wsp->walk_addr - lwd->lw_offset;
2268
2269 if (mdb_vread(lwd->lw_obj,
2270 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) {
2271 mdb_warn("failed to read list element at %#lx", addr);
2272 return (WALK_ERR);
2273 }
2274
2275 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata);
2276 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset);
2277 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff];
2278
2279 return (status);
2280 }
2281
2282 /*
2283 * ::walk spa
2284 *
2285 * Walk all named spa_t structures in the namespace. This is nothing more than
2286 * a layered avl walk.
2287 */
2288 static int
spa_walk_init(mdb_walk_state_t * wsp)2289 spa_walk_init(mdb_walk_state_t *wsp)
2290 {
2291 GElf_Sym sym;
2292
2293 if (wsp->walk_addr != NULL) {
2294 mdb_warn("spa walk only supports global walks\n");
2295 return (WALK_ERR);
2296 }
2297
2298 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) {
2299 mdb_warn("failed to find symbol 'spa_namespace_avl'");
2300 return (WALK_ERR);
2301 }
2302
2303 wsp->walk_addr = (uintptr_t)sym.st_value;
2304
2305 if (mdb_layered_walk("avl", wsp) == -1) {
2306 mdb_warn("failed to walk 'avl'\n");
2307 return (WALK_ERR);
2308 }
2309
2310 return (WALK_NEXT);
2311 }
2312
2313 static int
spa_walk_step(mdb_walk_state_t * wsp)2314 spa_walk_step(mdb_walk_state_t *wsp)
2315 {
2316 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata));
2317 }
2318
2319 /*
2320 * [addr]::walk zio
2321 *
2322 * Walk all active zio_t structures on the system. This is simply a layered
2323 * walk on top of ::walk zio_cache, with the optional ability to limit the
2324 * structures to a particular pool.
2325 */
2326 static int
zio_walk_init(mdb_walk_state_t * wsp)2327 zio_walk_init(mdb_walk_state_t *wsp)
2328 {
2329 wsp->walk_data = (void *)wsp->walk_addr;
2330
2331 if (mdb_layered_walk("zio_cache", wsp) == -1) {
2332 mdb_warn("failed to walk 'zio_cache'\n");
2333 return (WALK_ERR);
2334 }
2335
2336 return (WALK_NEXT);
2337 }
2338
2339 static int
zio_walk_step(mdb_walk_state_t * wsp)2340 zio_walk_step(mdb_walk_state_t *wsp)
2341 {
2342 mdb_zio_t zio;
2343 uintptr_t spa = (uintptr_t)wsp->walk_data;
2344
2345 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2346 wsp->walk_addr, 0) == -1)
2347 return (WALK_ERR);
2348
2349 if (spa != 0 && spa != zio.io_spa)
2350 return (WALK_NEXT);
2351
2352 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2353 }
2354
2355 /*
2356 * [addr]::walk zio_root
2357 *
2358 * Walk only root zio_t structures, optionally for a particular spa_t.
2359 */
2360 static int
zio_walk_root_step(mdb_walk_state_t * wsp)2361 zio_walk_root_step(mdb_walk_state_t *wsp)
2362 {
2363 mdb_zio_t zio;
2364 uintptr_t spa = (uintptr_t)wsp->walk_data;
2365
2366 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
2367 wsp->walk_addr, 0) == -1)
2368 return (WALK_ERR);
2369
2370 if (spa != 0 && spa != zio.io_spa)
2371 return (WALK_NEXT);
2372
2373 /* If the parent list is not empty, ignore */
2374 if (zio.io_parent_list.list_head.list_next !=
2375 wsp->walk_addr +
2376 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") +
2377 mdb_ctf_offsetof_by_name("struct list", "list_head"))
2378 return (WALK_NEXT);
2379
2380 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2381 }
2382
2383 /*
2384 * ::zfs_blkstats
2385 *
2386 * -v print verbose per-level information
2387 *
2388 */
2389 static int
zfs_blkstats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2390 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2391 {
2392 boolean_t verbose = B_FALSE;
2393 zfs_all_blkstats_t stats;
2394 dmu_object_type_t t;
2395 zfs_blkstat_t *tzb;
2396 uint64_t ditto;
2397 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10];
2398 /* +10 in case it grew */
2399
2400 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) {
2401 mdb_warn("failed to read 'dmu_ot'");
2402 return (DCMD_ERR);
2403 }
2404
2405 if (mdb_getopts(argc, argv,
2406 'v', MDB_OPT_SETBITS, TRUE, &verbose,
2407 NULL) != argc)
2408 return (DCMD_USAGE);
2409
2410 if (!(flags & DCMD_ADDRSPEC))
2411 return (DCMD_USAGE);
2412
2413 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) ||
2414 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) ||
2415 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) {
2416 mdb_warn("failed to read data at %p;", addr);
2417 mdb_printf("maybe no stats? run \"zpool scrub\" first.");
2418 return (DCMD_ERR);
2419 }
2420
2421 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL];
2422 if (tzb->zb_gangs != 0) {
2423 mdb_printf("Ganged blocks: %llu\n",
2424 (longlong_t)tzb->zb_gangs);
2425 }
2426
2427 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev +
2428 tzb->zb_ditto_3_of_3_samevdev;
2429 if (ditto != 0) {
2430 mdb_printf("Dittoed blocks on same vdev: %llu\n",
2431 (longlong_t)ditto);
2432 }
2433
2434 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2435 "\t avg\t comp\t%%Total\tType\n");
2436
2437 for (t = 0; t <= DMU_OT_TOTAL; t++) {
2438 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN];
2439 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN];
2440 char avg[NICENUM_BUFLEN];
2441 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN];
2442 char typename[64];
2443 int l;
2444
2445
2446 if (t == DMU_OT_DEFERRED)
2447 strcpy(typename, "deferred free");
2448 else if (t == DMU_OT_OTHER)
2449 strcpy(typename, "other");
2450 else if (t == DMU_OT_TOTAL)
2451 strcpy(typename, "Total");
2452 else if (mdb_readstr(typename, sizeof (typename),
2453 (uintptr_t)dmu_ot[t].ot_name) == -1) {
2454 mdb_warn("failed to read type name");
2455 return (DCMD_ERR);
2456 }
2457
2458 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0)
2459 continue;
2460
2461 for (l = -1; l < DN_MAX_LEVELS; l++) {
2462 int level = (l == -1 ? DN_MAX_LEVELS : l);
2463 zfs_blkstat_t *zb = &stats.zab_type[level][t];
2464
2465 if (zb->zb_asize == 0)
2466 continue;
2467
2468 /*
2469 * Don't print each level unless requested.
2470 */
2471 if (!verbose && level != DN_MAX_LEVELS)
2472 continue;
2473
2474 /*
2475 * If all the space is level 0, don't print the
2476 * level 0 separately.
2477 */
2478 if (level == 0 && zb->zb_asize ==
2479 stats.zab_type[DN_MAX_LEVELS][t].zb_asize)
2480 continue;
2481
2482 mdb_nicenum(zb->zb_count, csize);
2483 mdb_nicenum(zb->zb_lsize, lsize);
2484 mdb_nicenum(zb->zb_psize, psize);
2485 mdb_nicenum(zb->zb_asize, asize);
2486 mdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2487 (void) snprintfrac(comp, NICENUM_BUFLEN,
2488 zb->zb_lsize, zb->zb_psize, 2);
2489 (void) snprintfrac(pct, NICENUM_BUFLEN,
2490 100 * zb->zb_asize, tzb->zb_asize, 2);
2491
2492 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s"
2493 "\t%5s\t%6s\t",
2494 csize, lsize, psize, asize, avg, comp, pct);
2495
2496 if (level == DN_MAX_LEVELS)
2497 mdb_printf("%s\n", typename);
2498 else
2499 mdb_printf(" L%d %s\n",
2500 level, typename);
2501 }
2502 }
2503
2504 return (DCMD_OK);
2505 }
2506
2507 typedef struct mdb_reference {
2508 uintptr_t ref_holder;
2509 uintptr_t ref_removed;
2510 uint64_t ref_number;
2511 } mdb_reference_t;
2512
2513 /* ARGSUSED */
2514 static int
reference_cb(uintptr_t addr,const void * ignored,void * arg)2515 reference_cb(uintptr_t addr, const void *ignored, void *arg)
2516 {
2517 mdb_reference_t ref;
2518 boolean_t holder_is_str = B_FALSE;
2519 char holder_str[128];
2520 boolean_t removed = (boolean_t)arg;
2521
2522 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr,
2523 0) == -1)
2524 return (DCMD_ERR);
2525
2526 if (mdb_readstr(holder_str, sizeof (holder_str),
2527 ref.ref_holder) != -1)
2528 holder_is_str = strisprint(holder_str);
2529
2530 if (removed)
2531 mdb_printf("removed ");
2532 mdb_printf("reference ");
2533 if (ref.ref_number != 1)
2534 mdb_printf("with count=%llu ", ref.ref_number);
2535 mdb_printf("with tag %lx", ref.ref_holder);
2536 if (holder_is_str)
2537 mdb_printf(" \"%s\"", holder_str);
2538 mdb_printf(", held at:\n");
2539
2540 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
2541
2542 if (removed) {
2543 mdb_printf("removed at:\n");
2544 (void) mdb_call_dcmd("whatis", ref.ref_removed,
2545 DCMD_ADDRSPEC, 0, NULL);
2546 }
2547
2548 mdb_printf("\n");
2549
2550 return (WALK_NEXT);
2551 }
2552
2553 typedef struct mdb_refcount {
2554 uint64_t rc_count;
2555 } mdb_refcount_t;
2556
2557 typedef struct mdb_refcount_removed {
2558 uint64_t rc_removed_count;
2559 } mdb_refcount_removed_t;
2560
2561 typedef struct mdb_refcount_tracked {
2562 boolean_t rc_tracked;
2563 } mdb_refcount_tracked_t;
2564
2565 /* ARGSUSED */
2566 static int
refcount(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2567 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2568 {
2569 mdb_refcount_t rc;
2570 mdb_refcount_removed_t rcr;
2571 mdb_refcount_tracked_t rct;
2572 int off;
2573 boolean_t released = B_FALSE;
2574
2575 if (!(flags & DCMD_ADDRSPEC))
2576 return (DCMD_USAGE);
2577
2578 if (mdb_getopts(argc, argv,
2579 'r', MDB_OPT_SETBITS, B_TRUE, &released,
2580 NULL) != argc)
2581 return (DCMD_USAGE);
2582
2583 if (mdb_ctf_vread(&rc, "refcount_t", "mdb_refcount_t", addr,
2584 0) == -1)
2585 return (DCMD_ERR);
2586
2587 if (mdb_ctf_vread(&rcr, "refcount_t", "mdb_refcount_removed_t", addr,
2588 MDB_CTF_VREAD_QUIET) == -1) {
2589 mdb_printf("refcount_t at %p has %llu holds (untracked)\n",
2590 addr, (longlong_t)rc.rc_count);
2591 return (DCMD_OK);
2592 }
2593
2594 if (mdb_ctf_vread(&rct, "refcount_t", "mdb_refcount_tracked_t", addr,
2595 MDB_CTF_VREAD_QUIET) == -1) {
2596 /* If this is an old target, it might be tracked. */
2597 rct.rc_tracked = B_TRUE;
2598 }
2599
2600 mdb_printf("refcount_t at %p has %llu current holds, "
2601 "%llu recently released holds\n",
2602 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count);
2603
2604 if (rct.rc_tracked && rc.rc_count > 0)
2605 mdb_printf("current holds:\n");
2606 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_list");
2607 if (off == -1)
2608 return (DCMD_ERR);
2609 mdb_pwalk("list", reference_cb, (void*)B_FALSE, addr + off);
2610
2611 if (released && rcr.rc_removed_count > 0) {
2612 mdb_printf("released holds:\n");
2613
2614 off = mdb_ctf_offsetof_by_name("refcount_t", "rc_removed");
2615 if (off == -1)
2616 return (DCMD_ERR);
2617 mdb_pwalk("list", reference_cb, (void*)B_TRUE, addr + off);
2618 }
2619
2620 return (DCMD_OK);
2621 }
2622
2623 /* ARGSUSED */
2624 static int
sa_attr_table(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2625 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2626 {
2627 sa_attr_table_t *table;
2628 sa_os_t sa_os;
2629 char *name;
2630 int i;
2631
2632 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) {
2633 mdb_warn("failed to read sa_os at %p", addr);
2634 return (DCMD_ERR);
2635 }
2636
2637 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2638 UM_SLEEP | UM_GC);
2639 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC);
2640
2641 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2642 (uintptr_t)sa_os.sa_attr_table) == -1) {
2643 mdb_warn("failed to read sa_os at %p", addr);
2644 return (DCMD_ERR);
2645 }
2646
2647 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n",
2648 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME");
2649 for (i = 0; i != sa_os.sa_num_attrs; i++) {
2650 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name);
2651 mdb_printf("%5x %8x %8x %8x %-s\n",
2652 (int)table[i].sa_attr, (int)table[i].sa_registered,
2653 (int)table[i].sa_length, table[i].sa_byteswap, name);
2654 }
2655
2656 return (DCMD_OK);
2657 }
2658
2659 static int
sa_get_off_table(uintptr_t addr,uint32_t ** off_tab,int attr_count)2660 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count)
2661 {
2662 uintptr_t idx_table;
2663
2664 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) {
2665 mdb_printf("can't find offset table in sa_idx_tab\n");
2666 return (-1);
2667 }
2668
2669 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t),
2670 UM_SLEEP | UM_GC);
2671
2672 if (mdb_vread(*off_tab,
2673 attr_count * sizeof (uint32_t), idx_table) == -1) {
2674 mdb_warn("failed to attribute offset table %p", idx_table);
2675 return (-1);
2676 }
2677
2678 return (DCMD_OK);
2679 }
2680
2681 /*ARGSUSED*/
2682 static int
sa_attr_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2683 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2684 {
2685 uint32_t *offset_tab;
2686 int attr_count;
2687 uint64_t attr_id;
2688 uintptr_t attr_addr;
2689 uintptr_t bonus_tab, spill_tab;
2690 uintptr_t db_bonus, db_spill;
2691 uintptr_t os, os_sa;
2692 uintptr_t db_data;
2693
2694 if (argc != 1)
2695 return (DCMD_USAGE);
2696
2697 if (argv[0].a_type == MDB_TYPE_STRING)
2698 attr_id = mdb_strtoull(argv[0].a_un.a_str);
2699 else
2700 return (DCMD_USAGE);
2701
2702 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) ||
2703 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) ||
2704 GETMEMB(addr, "sa_handle", sa_os, os) ||
2705 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) ||
2706 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) {
2707 mdb_printf("Can't find necessary information in sa_handle "
2708 "in sa_handle\n");
2709 return (DCMD_ERR);
2710 }
2711
2712 if (GETMEMB(os, "objset", os_sa, os_sa)) {
2713 mdb_printf("Can't find os_sa in objset\n");
2714 return (DCMD_ERR);
2715 }
2716
2717 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) {
2718 mdb_printf("Can't find sa_num_attrs\n");
2719 return (DCMD_ERR);
2720 }
2721
2722 if (attr_id > attr_count) {
2723 mdb_printf("attribute id number is out of range\n");
2724 return (DCMD_ERR);
2725 }
2726
2727 if (bonus_tab) {
2728 if (sa_get_off_table(bonus_tab, &offset_tab,
2729 attr_count) == -1) {
2730 return (DCMD_ERR);
2731 }
2732
2733 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) {
2734 mdb_printf("can't find db_data in bonus dbuf\n");
2735 return (DCMD_ERR);
2736 }
2737 }
2738
2739 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) &&
2740 spill_tab == NULL) {
2741 mdb_printf("Attribute does not exist\n");
2742 return (DCMD_ERR);
2743 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) {
2744 if (sa_get_off_table(spill_tab, &offset_tab,
2745 attr_count) == -1) {
2746 return (DCMD_ERR);
2747 }
2748 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) {
2749 mdb_printf("can't find db_data in spill dbuf\n");
2750 return (DCMD_ERR);
2751 }
2752 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) {
2753 mdb_printf("Attribute does not exist\n");
2754 return (DCMD_ERR);
2755 }
2756 }
2757 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]);
2758 mdb_printf("%p\n", attr_addr);
2759 return (DCMD_OK);
2760 }
2761
2762 /* ARGSUSED */
2763 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)2764 zfs_ace_print_common(uintptr_t addr, uint_t flags,
2765 uint64_t id, uint32_t access_mask, uint16_t ace_flags,
2766 uint16_t ace_type, int verbose)
2767 {
2768 if (DCMD_HDRSPEC(flags) && !verbose)
2769 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n",
2770 "ADDR", "FLAGS", "MASK", "TYPE", "ID");
2771
2772 if (!verbose) {
2773 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr,
2774 ace_flags, access_mask, ace_type, id);
2775 return (DCMD_OK);
2776 }
2777
2778 switch (ace_flags & ACE_TYPE_FLAGS) {
2779 case ACE_OWNER:
2780 mdb_printf("owner@:");
2781 break;
2782 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
2783 mdb_printf("group@:");
2784 break;
2785 case ACE_EVERYONE:
2786 mdb_printf("everyone@:");
2787 break;
2788 case ACE_IDENTIFIER_GROUP:
2789 mdb_printf("group:%llx:", (u_longlong_t)id);
2790 break;
2791 case 0: /* User entry */
2792 mdb_printf("user:%llx:", (u_longlong_t)id);
2793 break;
2794 }
2795
2796 /* print out permission mask */
2797 if (access_mask & ACE_READ_DATA)
2798 mdb_printf("r");
2799 else
2800 mdb_printf("-");
2801 if (access_mask & ACE_WRITE_DATA)
2802 mdb_printf("w");
2803 else
2804 mdb_printf("-");
2805 if (access_mask & ACE_EXECUTE)
2806 mdb_printf("x");
2807 else
2808 mdb_printf("-");
2809 if (access_mask & ACE_APPEND_DATA)
2810 mdb_printf("p");
2811 else
2812 mdb_printf("-");
2813 if (access_mask & ACE_DELETE)
2814 mdb_printf("d");
2815 else
2816 mdb_printf("-");
2817 if (access_mask & ACE_DELETE_CHILD)
2818 mdb_printf("D");
2819 else
2820 mdb_printf("-");
2821 if (access_mask & ACE_READ_ATTRIBUTES)
2822 mdb_printf("a");
2823 else
2824 mdb_printf("-");
2825 if (access_mask & ACE_WRITE_ATTRIBUTES)
2826 mdb_printf("A");
2827 else
2828 mdb_printf("-");
2829 if (access_mask & ACE_READ_NAMED_ATTRS)
2830 mdb_printf("R");
2831 else
2832 mdb_printf("-");
2833 if (access_mask & ACE_WRITE_NAMED_ATTRS)
2834 mdb_printf("W");
2835 else
2836 mdb_printf("-");
2837 if (access_mask & ACE_READ_ACL)
2838 mdb_printf("c");
2839 else
2840 mdb_printf("-");
2841 if (access_mask & ACE_WRITE_ACL)
2842 mdb_printf("C");
2843 else
2844 mdb_printf("-");
2845 if (access_mask & ACE_WRITE_OWNER)
2846 mdb_printf("o");
2847 else
2848 mdb_printf("-");
2849 if (access_mask & ACE_SYNCHRONIZE)
2850 mdb_printf("s");
2851 else
2852 mdb_printf("-");
2853
2854 mdb_printf(":");
2855
2856 /* Print out inheritance flags */
2857 if (ace_flags & ACE_FILE_INHERIT_ACE)
2858 mdb_printf("f");
2859 else
2860 mdb_printf("-");
2861 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE)
2862 mdb_printf("d");
2863 else
2864 mdb_printf("-");
2865 if (ace_flags & ACE_INHERIT_ONLY_ACE)
2866 mdb_printf("i");
2867 else
2868 mdb_printf("-");
2869 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE)
2870 mdb_printf("n");
2871 else
2872 mdb_printf("-");
2873 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)
2874 mdb_printf("S");
2875 else
2876 mdb_printf("-");
2877 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG)
2878 mdb_printf("F");
2879 else
2880 mdb_printf("-");
2881 if (ace_flags & ACE_INHERITED_ACE)
2882 mdb_printf("I");
2883 else
2884 mdb_printf("-");
2885
2886 switch (ace_type) {
2887 case ACE_ACCESS_ALLOWED_ACE_TYPE:
2888 mdb_printf(":allow\n");
2889 break;
2890 case ACE_ACCESS_DENIED_ACE_TYPE:
2891 mdb_printf(":deny\n");
2892 break;
2893 case ACE_SYSTEM_AUDIT_ACE_TYPE:
2894 mdb_printf(":audit\n");
2895 break;
2896 case ACE_SYSTEM_ALARM_ACE_TYPE:
2897 mdb_printf(":alarm\n");
2898 break;
2899 default:
2900 mdb_printf(":?\n");
2901 }
2902 return (DCMD_OK);
2903 }
2904
2905 /* ARGSUSED */
2906 static int
zfs_ace_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2907 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2908 {
2909 zfs_ace_t zace;
2910 int verbose = FALSE;
2911 uint64_t id;
2912
2913 if (!(flags & DCMD_ADDRSPEC))
2914 return (DCMD_USAGE);
2915
2916 if (mdb_getopts(argc, argv,
2917 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2918 return (DCMD_USAGE);
2919
2920 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) {
2921 mdb_warn("failed to read zfs_ace_t");
2922 return (DCMD_ERR);
2923 }
2924
2925 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 ||
2926 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2927 id = zace.z_fuid;
2928 else
2929 id = -1;
2930
2931 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask,
2932 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose));
2933 }
2934
2935 /* ARGSUSED */
2936 static int
zfs_ace0_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2937 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2938 {
2939 ace_t ace;
2940 uint64_t id;
2941 int verbose = FALSE;
2942
2943 if (!(flags & DCMD_ADDRSPEC))
2944 return (DCMD_USAGE);
2945
2946 if (mdb_getopts(argc, argv,
2947 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2948 return (DCMD_USAGE);
2949
2950 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) {
2951 mdb_warn("failed to read ace_t");
2952 return (DCMD_ERR);
2953 }
2954
2955 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 ||
2956 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2957 id = ace.a_who;
2958 else
2959 id = -1;
2960
2961 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask,
2962 ace.a_flags, ace.a_type, verbose));
2963 }
2964
2965 typedef struct acl_dump_args {
2966 int a_argc;
2967 const mdb_arg_t *a_argv;
2968 uint16_t a_version;
2969 int a_flags;
2970 } acl_dump_args_t;
2971
2972 /* ARGSUSED */
2973 static int
acl_aces_cb(uintptr_t addr,const void * unknown,void * arg)2974 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg)
2975 {
2976 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2977
2978 if (acl_args->a_version == 1) {
2979 if (mdb_call_dcmd("zfs_ace", addr,
2980 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2981 acl_args->a_argv) != DCMD_OK) {
2982 return (WALK_ERR);
2983 }
2984 } else {
2985 if (mdb_call_dcmd("zfs_ace0", addr,
2986 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2987 acl_args->a_argv) != DCMD_OK) {
2988 return (WALK_ERR);
2989 }
2990 }
2991 acl_args->a_flags = DCMD_LOOP;
2992 return (WALK_NEXT);
2993 }
2994
2995 /* ARGSUSED */
2996 static int
acl_cb(uintptr_t addr,const void * unknown,void * arg)2997 acl_cb(uintptr_t addr, const void *unknown, void *arg)
2998 {
2999 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
3000
3001 if (acl_args->a_version == 1) {
3002 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb,
3003 arg, addr) != 0) {
3004 mdb_warn("can't walk ACEs");
3005 return (DCMD_ERR);
3006 }
3007 } else {
3008 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb,
3009 arg, addr) != 0) {
3010 mdb_warn("can't walk ACEs");
3011 return (DCMD_ERR);
3012 }
3013 }
3014 return (WALK_NEXT);
3015 }
3016
3017 /* ARGSUSED */
3018 static int
zfs_acl_dump(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3019 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3020 {
3021 zfs_acl_t zacl;
3022 int verbose = FALSE;
3023 acl_dump_args_t acl_args;
3024
3025 if (!(flags & DCMD_ADDRSPEC))
3026 return (DCMD_USAGE);
3027
3028 if (mdb_getopts(argc, argv,
3029 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3030 return (DCMD_USAGE);
3031
3032 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) {
3033 mdb_warn("failed to read zfs_acl_t");
3034 return (DCMD_ERR);
3035 }
3036
3037 acl_args.a_argc = argc;
3038 acl_args.a_argv = argv;
3039 acl_args.a_version = zacl.z_version;
3040 acl_args.a_flags = DCMD_LOOPFIRST;
3041
3042 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) {
3043 mdb_warn("can't walk ACL");
3044 return (DCMD_ERR);
3045 }
3046
3047 return (DCMD_OK);
3048 }
3049
3050 /* ARGSUSED */
3051 static int
zfs_acl_node_walk_init(mdb_walk_state_t * wsp)3052 zfs_acl_node_walk_init(mdb_walk_state_t *wsp)
3053 {
3054 if (wsp->walk_addr == NULL) {
3055 mdb_warn("must supply address of zfs_acl_node_t\n");
3056 return (WALK_ERR);
3057 }
3058
3059 wsp->walk_addr +=
3060 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl");
3061
3062 if (mdb_layered_walk("list", wsp) == -1) {
3063 mdb_warn("failed to walk 'list'\n");
3064 return (WALK_ERR);
3065 }
3066
3067 return (WALK_NEXT);
3068 }
3069
3070 static int
zfs_acl_node_walk_step(mdb_walk_state_t * wsp)3071 zfs_acl_node_walk_step(mdb_walk_state_t *wsp)
3072 {
3073 zfs_acl_node_t aclnode;
3074
3075 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t),
3076 wsp->walk_addr) == -1) {
3077 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr);
3078 return (WALK_ERR);
3079 }
3080
3081 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata));
3082 }
3083
3084 typedef struct ace_walk_data {
3085 int ace_count;
3086 int ace_version;
3087 } ace_walk_data_t;
3088
3089 static int
zfs_aces_walk_init_common(mdb_walk_state_t * wsp,int version,int ace_count,uintptr_t ace_data)3090 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version,
3091 int ace_count, uintptr_t ace_data)
3092 {
3093 ace_walk_data_t *ace_walk_data;
3094
3095 if (wsp->walk_addr == NULL) {
3096 mdb_warn("must supply address of zfs_acl_node_t\n");
3097 return (WALK_ERR);
3098 }
3099
3100 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC);
3101
3102 ace_walk_data->ace_count = ace_count;
3103 ace_walk_data->ace_version = version;
3104
3105 wsp->walk_addr = ace_data;
3106 wsp->walk_data = ace_walk_data;
3107
3108 return (WALK_NEXT);
3109 }
3110
3111 static int
zfs_acl_node_aces_walk_init_common(mdb_walk_state_t * wsp,int version)3112 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version)
3113 {
3114 static int gotid;
3115 static mdb_ctf_id_t acl_id;
3116 int z_ace_count;
3117 uintptr_t z_acldata;
3118
3119 if (!gotid) {
3120 if (mdb_ctf_lookup_by_name("struct zfs_acl_node",
3121 &acl_id) == -1) {
3122 mdb_warn("couldn't find struct zfs_acl_node");
3123 return (DCMD_ERR);
3124 }
3125 gotid = TRUE;
3126 }
3127
3128 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) {
3129 return (DCMD_ERR);
3130 }
3131 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) {
3132 return (DCMD_ERR);
3133 }
3134
3135 return (zfs_aces_walk_init_common(wsp, version,
3136 z_ace_count, z_acldata));
3137 }
3138
3139 /* ARGSUSED */
3140 static int
zfs_acl_node_aces_walk_init(mdb_walk_state_t * wsp)3141 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp)
3142 {
3143 return (zfs_acl_node_aces_walk_init_common(wsp, 1));
3144 }
3145
3146 /* ARGSUSED */
3147 static int
zfs_acl_node_aces0_walk_init(mdb_walk_state_t * wsp)3148 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp)
3149 {
3150 return (zfs_acl_node_aces_walk_init_common(wsp, 0));
3151 }
3152
3153 static int
zfs_aces_walk_step(mdb_walk_state_t * wsp)3154 zfs_aces_walk_step(mdb_walk_state_t *wsp)
3155 {
3156 ace_walk_data_t *ace_data = wsp->walk_data;
3157 zfs_ace_t zace;
3158 ace_t *acep;
3159 int status;
3160 int entry_type;
3161 int allow_type;
3162 uintptr_t ptr;
3163
3164 if (ace_data->ace_count == 0)
3165 return (WALK_DONE);
3166
3167 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) {
3168 mdb_warn("failed to read zfs_ace_t at %#lx",
3169 wsp->walk_addr);
3170 return (WALK_ERR);
3171 }
3172
3173 switch (ace_data->ace_version) {
3174 case 0:
3175 acep = (ace_t *)&zace;
3176 entry_type = acep->a_flags & ACE_TYPE_FLAGS;
3177 allow_type = acep->a_type;
3178 break;
3179 case 1:
3180 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS;
3181 allow_type = zace.z_hdr.z_type;
3182 break;
3183 default:
3184 return (WALK_ERR);
3185 }
3186
3187 ptr = (uintptr_t)wsp->walk_addr;
3188 switch (entry_type) {
3189 case ACE_OWNER:
3190 case ACE_EVERYONE:
3191 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
3192 ptr += ace_data->ace_version == 0 ?
3193 sizeof (ace_t) : sizeof (zfs_ace_hdr_t);
3194 break;
3195 case ACE_IDENTIFIER_GROUP:
3196 default:
3197 switch (allow_type) {
3198 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
3199 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
3200 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
3201 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
3202 ptr += ace_data->ace_version == 0 ?
3203 sizeof (ace_t) : sizeof (zfs_object_ace_t);
3204 break;
3205 default:
3206 ptr += ace_data->ace_version == 0 ?
3207 sizeof (ace_t) : sizeof (zfs_ace_t);
3208 break;
3209 }
3210 }
3211
3212 ace_data->ace_count--;
3213 status = wsp->walk_callback(wsp->walk_addr,
3214 (void *)(uintptr_t)&zace, wsp->walk_cbdata);
3215
3216 wsp->walk_addr = ptr;
3217 return (status);
3218 }
3219
3220 typedef struct mdb_zfs_rrwlock {
3221 uintptr_t rr_writer;
3222 boolean_t rr_writer_wanted;
3223 } mdb_zfs_rrwlock_t;
3224
3225 static uint_t rrw_key;
3226
3227 /* ARGSUSED */
3228 static int
rrwlock(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3229 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3230 {
3231 mdb_zfs_rrwlock_t rrw;
3232
3233 if (rrw_key == 0) {
3234 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1)
3235 return (DCMD_ERR);
3236 }
3237
3238 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr,
3239 0) == -1)
3240 return (DCMD_ERR);
3241
3242 if (rrw.rr_writer != 0) {
3243 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer);
3244 return (DCMD_OK);
3245 }
3246
3247 if (rrw.rr_writer_wanted) {
3248 mdb_printf("writer wanted\n");
3249 }
3250
3251 mdb_printf("anonymous references:\n");
3252 (void) mdb_call_dcmd("refcount", addr +
3253 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"),
3254 DCMD_ADDRSPEC, 0, NULL);
3255
3256 mdb_printf("linked references:\n");
3257 (void) mdb_call_dcmd("refcount", addr +
3258 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"),
3259 DCMD_ADDRSPEC, 0, NULL);
3260
3261 /*
3262 * XXX This should find references from
3263 * "::walk thread | ::tsd -v <rrw_key>", but there is no support
3264 * for programmatic consumption of dcmds, so this would be
3265 * difficult, potentially requiring reimplementing ::tsd (both
3266 * user and kernel versions) in this MDB module.
3267 */
3268
3269 return (DCMD_OK);
3270 }
3271
3272 /*
3273 * MDB module linkage information:
3274 *
3275 * We declare a list of structures describing our dcmds, and a function
3276 * named _mdb_init to return a pointer to our module information.
3277 */
3278
3279 static const mdb_dcmd_t dcmds[] = {
3280 { "arc", "[-bkmg]", "print ARC variables", arc_print },
3281 { "blkptr", ":", "print blkptr_t", blkptr },
3282 { "dbuf", ":", "print dmu_buf_impl_t", dbuf },
3283 { "dbuf_stats", ":", "dbuf stats", dbuf_stats },
3284 { "dbufs",
3285 "\t[-O objset_t*] [-n objset_name | \"mos\"] "
3286 "[-o object | \"mdn\"] \n"
3287 "\t[-l level] [-b blkid | \"bonus\"]",
3288 "find dmu_buf_impl_t's that match specified criteria", dbufs },
3289 { "abuf_find", "dva_word[0] dva_word[1]",
3290 "find arc_buf_hdr_t of a specified DVA",
3291 abuf_find },
3292 { "spa", "?[-cevmMh]\n"
3293 "\t-c display spa config\n"
3294 "\t-e display vdev statistics\n"
3295 "\t-v display vdev information\n"
3296 "\t-m display metaslab statistics\n"
3297 "\t-M display metaslab group statistics\n"
3298 "\t-h display histogram (requires -m or -M)\n",
3299 "spa_t summary", spa_print },
3300 { "spa_config", ":", "print spa_t configuration", spa_print_config },
3301 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space },
3302 { "spa_vdevs", ":[-emMh]\n"
3303 "\t-e display vdev statistics\n"
3304 "\t-m dispaly metaslab statistics\n"
3305 "\t-M display metaslab group statistic\n"
3306 "\t-h display histogram (requires -m or -M)\n",
3307 "given a spa_t, print vdev summary", spa_vdevs },
3308 { "vdev", ":[-re]\n"
3309 "\t-r display recursively\n"
3310 "\t-e display statistics\n"
3311 "\t-m display metaslab statistics\n"
3312 "\t-M display metaslab group statistics\n"
3313 "\t-h display histogram (requires -m or -M)\n",
3314 "vdev_t summary", vdev_print },
3315 { "zio", ":[-cpr]\n"
3316 "\t-c display children\n"
3317 "\t-p display parents\n"
3318 "\t-r display recursively",
3319 "zio_t summary", zio_print },
3320 { "zio_state", "?", "print out all zio_t structures on system or "
3321 "for a particular pool", zio_state },
3322 { "zfs_blkstats", ":[-v]",
3323 "given a spa_t, print block type stats from last scrub",
3324 zfs_blkstats },
3325 { "zfs_params", "", "print zfs tunable parameters", zfs_params },
3326 { "refcount", ":[-r]\n"
3327 "\t-r display recently removed references",
3328 "print refcount_t holders", refcount },
3329 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf },
3330 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t",
3331 zfs_acl_dump },
3332 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print },
3333 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print },
3334 { "sa_attr_table", ":", "print SA attribute table from sa_os_t",
3335 sa_attr_table},
3336 { "sa_attr", ": attr_id",
3337 "print SA attribute address when given sa_handle_t", sa_attr_print},
3338 { "zfs_dbgmsg", ":[-va]",
3339 "print zfs debug log", dbgmsg},
3340 { "rrwlock", ":",
3341 "print rrwlock_t, including readers", rrwlock},
3342 { NULL }
3343 };
3344
3345 static const mdb_walker_t walkers[] = {
3346 { "zms_freelist", "walk ZFS metaslab freelist",
3347 freelist_walk_init, freelist_walk_step, NULL },
3348 { "txg_list", "given any txg_list_t *, walk all entries in all txgs",
3349 txg_list_walk_init, txg_list_walk_step, NULL },
3350 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0",
3351 txg_list0_walk_init, txg_list_walk_step, NULL },
3352 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1",
3353 txg_list1_walk_init, txg_list_walk_step, NULL },
3354 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2",
3355 txg_list2_walk_init, txg_list_walk_step, NULL },
3356 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3",
3357 txg_list3_walk_init, txg_list_walk_step, NULL },
3358 { "zio", "walk all zio structures, optionally for a particular spa_t",
3359 zio_walk_init, zio_walk_step, NULL },
3360 { "zio_root",
3361 "walk all root zio_t structures, optionally for a particular spa_t",
3362 zio_walk_init, zio_walk_root_step, NULL },
3363 { "spa", "walk all spa_t entries in the namespace",
3364 spa_walk_init, spa_walk_step, NULL },
3365 { "metaslab", "given a spa_t *, walk all metaslab_t structures",
3366 metaslab_walk_init, metaslab_walk_step, NULL },
3367 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes",
3368 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL },
3369 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs",
3370 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL },
3371 { "zfs_acl_node_aces0",
3372 "given a zfs_acl_node_t, walk all ACEs as ace_t",
3373 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL },
3374 { NULL }
3375 };
3376
3377 static const mdb_modinfo_t modinfo = {
3378 MDB_API_VERSION, dcmds, walkers
3379 };
3380
3381 const mdb_modinfo_t *
_mdb_init(void)3382 _mdb_init(void)
3383 {
3384 return (&modinfo);
3385 }
3386