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