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, 2018 by Delphix. All rights reserved.
25 * Copyright 2020 Joyent, Inc.
26 * Copyright 2024 Oxide Computer Company
27 */
28
29 /* Portions Copyright 2010 Robert Milkowski */
30
31 /*
32 * ZFS_MDB lets dmu.h know that we don't have dmu_ot, and we will define our
33 * own macros to access the target's dmu_ot. Therefore it must be defined
34 * before including any ZFS headers. Note that we don't define
35 * DMU_OT_IS_ENCRYPTED_IMPL() or DMU_OT_BYTESWAP_IMPL(), therefore using them
36 * will result in a compilation error. If they are needed in the future, we
37 * can implement them similarly to mdb_dmu_ot_is_encrypted_impl().
38 */
39 #define ZFS_MDB
40 #define DMU_OT_IS_ENCRYPTED_IMPL(ot) mdb_dmu_ot_is_encrypted_impl(ot)
41
42 #include <mdb/mdb_ctf.h>
43 #include <sys/zfs_context.h>
44 #include <sys/mdb_modapi.h>
45 #include <sys/dbuf.h>
46 #include <sys/dmu_objset.h>
47 #include <sys/dsl_dir.h>
48 #include <sys/dsl_pool.h>
49 #include <sys/metaslab_impl.h>
50 #include <sys/space_map.h>
51 #include <sys/list.h>
52 #include <sys/vdev_impl.h>
53 #include <sys/zap_leaf.h>
54 #include <sys/zap_impl.h>
55 #include <ctype.h>
56 #include <sys/zfs_acl.h>
57 #include <sys/sa_impl.h>
58 #include <sys/multilist.h>
59 #include <sys/btree.h>
60
61 #ifdef _KERNEL
62 #define ZFS_OBJ_NAME "zfs"
63 extern int64_t mdb_gethrtime(void);
64 #else
65 #define ZFS_OBJ_NAME "libzpool.so.1"
66 #endif
67
68 #define ZFS_STRUCT "struct " ZFS_OBJ_NAME "`"
69
70 #ifndef _KERNEL
71 int aok;
72 #endif
73
74 enum spa_flags {
75 SPA_FLAG_CONFIG = 1 << 0,
76 SPA_FLAG_VDEVS = 1 << 1,
77 SPA_FLAG_ERRORS = 1 << 2,
78 SPA_FLAG_METASLAB_GROUPS = 1 << 3,
79 SPA_FLAG_METASLABS = 1 << 4,
80 SPA_FLAG_HISTOGRAMS = 1 << 5
81 };
82
83 /*
84 * If any of these flags are set, call spa_vdevs in spa_print
85 */
86 #define SPA_FLAG_ALL_VDEV \
87 (SPA_FLAG_VDEVS | SPA_FLAG_ERRORS | SPA_FLAG_METASLAB_GROUPS | \
88 SPA_FLAG_METASLABS)
89
90 static int
getmember(uintptr_t addr,const char * type,mdb_ctf_id_t * idp,const char * member,int len,void * buf)91 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp,
92 const char *member, int len, void *buf)
93 {
94 mdb_ctf_id_t id;
95 ulong_t off;
96 char name[64];
97
98 if (idp == NULL) {
99 if (mdb_ctf_lookup_by_name(type, &id) == -1) {
100 mdb_warn("couldn't find type %s", type);
101 return (DCMD_ERR);
102 }
103 idp = &id;
104 } else {
105 type = name;
106 mdb_ctf_type_name(*idp, name, sizeof (name));
107 }
108
109 if (mdb_ctf_offsetof(*idp, member, &off) == -1) {
110 mdb_warn("couldn't find member %s of type %s\n", member, type);
111 return (DCMD_ERR);
112 }
113 if (off % 8 != 0) {
114 mdb_warn("member %s of type %s is unsupported bitfield",
115 member, type);
116 return (DCMD_ERR);
117 }
118 off /= 8;
119
120 if (mdb_vread(buf, len, addr + off) == -1) {
121 mdb_warn("failed to read %s from %s at %p",
122 member, type, addr + off);
123 return (DCMD_ERR);
124 }
125 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */
126
127 return (0);
128 }
129
130 #define GETMEMB(addr, structname, member, dest) \
131 getmember(addr, ZFS_STRUCT structname, NULL, #member, \
132 sizeof (dest), &(dest))
133
134 #define GETMEMBID(addr, ctfid, member, dest) \
135 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest))
136
137 static boolean_t
strisprint(const char * cp)138 strisprint(const char *cp)
139 {
140 for (; *cp; cp++) {
141 if (!isprint(*cp))
142 return (B_FALSE);
143 }
144 return (B_TRUE);
145 }
146
147 /*
148 * <addr>::sm_entries <buffer length in bytes>
149 *
150 * Treat the buffer specified by the given address as a buffer that contains
151 * space map entries. Iterate over the specified number of entries and print
152 * them in both encoded and decoded form.
153 */
154 /* ARGSUSED */
155 static int
sm_entries(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)156 sm_entries(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
157 {
158 uint64_t bufsz = 0;
159 boolean_t preview = B_FALSE;
160
161 if (!(flags & DCMD_ADDRSPEC))
162 return (DCMD_USAGE);
163
164 if (argc < 1) {
165 preview = B_TRUE;
166 bufsz = 2;
167 } else if (argc != 1) {
168 return (DCMD_USAGE);
169 } else {
170 switch (argv[0].a_type) {
171 case MDB_TYPE_STRING:
172 bufsz = mdb_strtoull(argv[0].a_un.a_str);
173 break;
174 case MDB_TYPE_IMMEDIATE:
175 bufsz = argv[0].a_un.a_val;
176 break;
177 default:
178 return (DCMD_USAGE);
179 }
180 }
181
182 char *actions[] = { "ALLOC", "FREE", "INVALID" };
183 for (uintptr_t bufend = addr + bufsz; addr < bufend;
184 addr += sizeof (uint64_t)) {
185 uint64_t nwords;
186 uint64_t start_addr = addr;
187
188 uint64_t word = 0;
189 if (mdb_vread(&word, sizeof (word), addr) == -1) {
190 mdb_warn("failed to read space map entry %p", addr);
191 return (DCMD_ERR);
192 }
193
194 if (SM_PREFIX_DECODE(word) == SM_DEBUG_PREFIX) {
195 (void) mdb_printf("\t [%6llu] %s: txg %llu, "
196 "pass %llu\n",
197 (u_longlong_t)(addr),
198 actions[SM_DEBUG_ACTION_DECODE(word)],
199 (u_longlong_t)SM_DEBUG_TXG_DECODE(word),
200 (u_longlong_t)SM_DEBUG_SYNCPASS_DECODE(word));
201 continue;
202 }
203
204 char entry_type;
205 uint64_t raw_offset, raw_run, vdev_id = SM_NO_VDEVID;
206
207 if (SM_PREFIX_DECODE(word) != SM2_PREFIX) {
208 entry_type = (SM_TYPE_DECODE(word) == SM_ALLOC) ?
209 'A' : 'F';
210 raw_offset = SM_OFFSET_DECODE(word);
211 raw_run = SM_RUN_DECODE(word);
212 nwords = 1;
213 } else {
214 ASSERT3U(SM_PREFIX_DECODE(word), ==, SM2_PREFIX);
215
216 raw_run = SM2_RUN_DECODE(word);
217 vdev_id = SM2_VDEV_DECODE(word);
218
219 /* it is a two-word entry so we read another word */
220 addr += sizeof (uint64_t);
221 if (addr >= bufend) {
222 mdb_warn("buffer ends in the middle of a two "
223 "word entry\n", addr);
224 return (DCMD_ERR);
225 }
226
227 if (mdb_vread(&word, sizeof (word), addr) == -1) {
228 mdb_warn("failed to read space map entry %p",
229 addr);
230 return (DCMD_ERR);
231 }
232
233 entry_type = (SM2_TYPE_DECODE(word) == SM_ALLOC) ?
234 'A' : 'F';
235 raw_offset = SM2_OFFSET_DECODE(word);
236 nwords = 2;
237 }
238
239 (void) mdb_printf("\t [%6llx] %c range:"
240 " %010llx-%010llx size: %06llx vdev: %06llu words: %llu\n",
241 (u_longlong_t)start_addr,
242 entry_type, (u_longlong_t)raw_offset,
243 (u_longlong_t)(raw_offset + raw_run),
244 (u_longlong_t)raw_run,
245 (u_longlong_t)vdev_id, (u_longlong_t)nwords);
246
247 if (preview)
248 break;
249 }
250 return (DCMD_OK);
251 }
252
253 static int
mdb_dsl_dir_name(uintptr_t addr,char * buf)254 mdb_dsl_dir_name(uintptr_t addr, char *buf)
255 {
256 static int gotid;
257 static mdb_ctf_id_t dd_id;
258 uintptr_t dd_parent;
259 char dd_myname[ZFS_MAX_DATASET_NAME_LEN];
260
261 if (!gotid) {
262 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dir",
263 &dd_id) == -1) {
264 mdb_warn("couldn't find struct dsl_dir");
265 return (DCMD_ERR);
266 }
267 gotid = TRUE;
268 }
269 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) ||
270 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) {
271 return (DCMD_ERR);
272 }
273
274 if (dd_parent) {
275 if (mdb_dsl_dir_name(dd_parent, buf))
276 return (DCMD_ERR);
277 strcat(buf, "/");
278 }
279
280 if (dd_myname[0])
281 strcat(buf, dd_myname);
282 else
283 strcat(buf, "???");
284
285 return (0);
286 }
287
288 static int
objset_name(uintptr_t addr,char * buf)289 objset_name(uintptr_t addr, char *buf)
290 {
291 static int gotid;
292 static mdb_ctf_id_t os_id, ds_id;
293 uintptr_t os_dsl_dataset;
294 char ds_snapname[ZFS_MAX_DATASET_NAME_LEN];
295 uintptr_t ds_dir;
296
297 buf[0] = '\0';
298
299 if (!gotid) {
300 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "objset",
301 &os_id) == -1) {
302 mdb_warn("couldn't find struct objset");
303 return (DCMD_ERR);
304 }
305 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dsl_dataset",
306 &ds_id) == -1) {
307 mdb_warn("couldn't find struct dsl_dataset");
308 return (DCMD_ERR);
309 }
310
311 gotid = TRUE;
312 }
313
314 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset))
315 return (DCMD_ERR);
316
317 if (os_dsl_dataset == 0) {
318 strcat(buf, "mos");
319 return (0);
320 }
321
322 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) ||
323 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) {
324 return (DCMD_ERR);
325 }
326
327 if (ds_dir && mdb_dsl_dir_name(ds_dir, buf))
328 return (DCMD_ERR);
329
330 if (ds_snapname[0]) {
331 strcat(buf, "@");
332 strcat(buf, ds_snapname);
333 }
334 return (0);
335 }
336
337 static int
enum_lookup(char * type,int val,const char * prefix,size_t size,char * out)338 enum_lookup(char *type, int val, const char *prefix, size_t size, char *out)
339 {
340 const char *cp;
341 size_t len = strlen(prefix);
342 mdb_ctf_id_t enum_type;
343
344 if (mdb_ctf_lookup_by_name(type, &enum_type) != 0) {
345 mdb_warn("Could not find enum for %s", type);
346 return (-1);
347 }
348
349 if ((cp = mdb_ctf_enum_name(enum_type, val)) != NULL) {
350 if (strncmp(cp, prefix, len) == 0)
351 cp += len;
352 (void) strncpy(out, cp, size);
353 } else {
354 mdb_snprintf(out, size, "? (%d)", val);
355 }
356 return (0);
357 }
358
359 /* ARGSUSED */
360 static int
zfs_params(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)361 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
362 {
363 /*
364 * This table can be approximately generated by running:
365 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2
366 */
367 static const char *params[] = {
368 "arc_lotsfree_percent",
369 "arc_pages_pp_reserve",
370 "arc_reduce_dnlc_percent",
371 "arc_swapfs_reserve",
372 "arc_zio_arena_free_shift",
373 "dbuf_cache_hiwater_pct",
374 "dbuf_cache_lowater_pct",
375 "dbuf_cache_max_bytes",
376 "dbuf_cache_max_shift",
377 "ddt_zap_indirect_blockshift",
378 "ddt_zap_leaf_blockshift",
379 "ditto_same_vdev_distance_shift",
380 "dmu_find_threads",
381 "dmu_rescan_dnode_threshold",
382 "dsl_scan_delay_completion",
383 "fzap_default_block_shift",
384 "l2arc_feed_again",
385 "l2arc_feed_min_ms",
386 "l2arc_feed_secs",
387 "l2arc_headroom",
388 "l2arc_headroom_boost",
389 "l2arc_noprefetch",
390 "l2arc_norw",
391 "l2arc_write_boost",
392 "l2arc_write_max",
393 "metaslab_aliquot",
394 "metaslab_bias_enabled",
395 "metaslab_debug_load",
396 "metaslab_debug_unload",
397 "metaslab_df_alloc_threshold",
398 "metaslab_df_free_pct",
399 "metaslab_fragmentation_factor_enabled",
400 "metaslab_force_ganging",
401 "metaslab_lba_weighting_enabled",
402 "metaslab_load_pct",
403 "metaslab_min_alloc_size",
404 "metaslab_ndf_clump_shift",
405 "metaslab_preload_enabled",
406 "metaslab_preload_limit",
407 "metaslab_trace_enabled",
408 "metaslab_trace_max_entries",
409 "metaslab_unload_delay",
410 "metaslabs_per_vdev",
411 "reference_history",
412 "reference_tracking_enable",
413 "send_holes_without_birth_time",
414 "spa_asize_inflation",
415 "spa_load_verify_data",
416 "spa_load_verify_maxinflight",
417 "spa_load_verify_metadata",
418 "spa_max_replication_override",
419 "spa_min_slop",
420 "spa_mode_global",
421 "spa_slop_shift",
422 "space_map_blksz",
423 "vdev_mirror_shift",
424 "zfetch_max_distance",
425 "zfs_abd_chunk_size",
426 "zfs_abd_scatter_enabled",
427 "zfs_arc_average_blocksize",
428 "zfs_arc_evict_batch_limit",
429 "zfs_arc_grow_retry",
430 "zfs_arc_max",
431 "zfs_arc_meta_limit",
432 "zfs_arc_meta_min",
433 "zfs_arc_min",
434 "zfs_arc_p_min_shift",
435 "zfs_arc_shrink_shift",
436 "zfs_async_block_max_blocks",
437 "zfs_ccw_retry_interval",
438 "zfs_commit_timeout_pct",
439 "zfs_compressed_arc_enabled",
440 "zfs_condense_indirect_commit_entry_delay_ticks",
441 "zfs_condense_indirect_vdevs_enable",
442 "zfs_condense_max_obsolete_bytes",
443 "zfs_condense_min_mapping_bytes",
444 "zfs_condense_pct",
445 "zfs_dbgmsg_maxsize",
446 "zfs_deadman_checktime_ms",
447 "zfs_deadman_enabled",
448 "zfs_deadman_synctime_ms",
449 "zfs_dedup_prefetch",
450 "zfs_default_bs",
451 "zfs_default_ibs",
452 "zfs_delay_max_ns",
453 "zfs_delay_min_dirty_percent",
454 "zfs_delay_resolution_ns",
455 "zfs_delay_scale",
456 "zfs_dirty_data_max",
457 "zfs_dirty_data_max_max",
458 "zfs_dirty_data_max_percent",
459 "zfs_dirty_data_sync",
460 "zfs_flags",
461 "zfs_free_bpobj_enabled",
462 "zfs_free_leak_on_eio",
463 "zfs_free_min_time_ms",
464 "zfs_fsync_sync_cnt",
465 "zfs_immediate_write_sz",
466 "zfs_indirect_condense_obsolete_pct",
467 "zfs_lua_check_instrlimit_interval",
468 "zfs_lua_max_instrlimit",
469 "zfs_lua_max_memlimit",
470 "zfs_max_recordsize",
471 "zfs_mdcomp_disable",
472 "zfs_metaslab_condense_block_threshold",
473 "zfs_metaslab_fragmentation_threshold",
474 "zfs_metaslab_segment_weight_enabled",
475 "zfs_metaslab_switch_threshold",
476 "zfs_mg_fragmentation_threshold",
477 "zfs_mg_noalloc_threshold",
478 "zfs_multilist_num_sublists",
479 "zfs_no_scrub_io",
480 "zfs_no_scrub_prefetch",
481 "zfs_nocacheflush",
482 "zfs_nopwrite_enabled",
483 "zfs_object_remap_one_indirect_delay_ticks",
484 "zfs_obsolete_min_time_ms",
485 "zfs_pd_bytes_max",
486 "zfs_per_txg_dirty_frees_percent",
487 "zfs_prefetch_disable",
488 "zfs_read_chunk_size",
489 "zfs_recover",
490 "zfs_recv_queue_length",
491 "zfs_redundant_metadata_most_ditto_level",
492 "zfs_remap_blkptr_enable",
493 "zfs_remove_max_copy_bytes",
494 "zfs_remove_max_segment",
495 "zfs_resilver_delay",
496 "zfs_resilver_min_time_ms",
497 "zfs_scan_idle",
498 "zfs_scan_min_time_ms",
499 "zfs_scrub_delay",
500 "zfs_scrub_limit",
501 "zfs_send_corrupt_data",
502 "zfs_send_queue_length",
503 "zfs_send_set_freerecords_bit",
504 "zfs_sync_pass_deferred_free",
505 "zfs_sync_pass_dont_compress",
506 "zfs_sync_pass_rewrite",
507 "zfs_sync_taskq_batch_pct",
508 "zfs_top_maxinflight",
509 "zfs_txg_timeout",
510 "zfs_vdev_aggregation_limit",
511 "zfs_vdev_async_read_max_active",
512 "zfs_vdev_async_read_min_active",
513 "zfs_vdev_async_write_active_max_dirty_percent",
514 "zfs_vdev_async_write_active_min_dirty_percent",
515 "zfs_vdev_async_write_max_active",
516 "zfs_vdev_async_write_min_active",
517 "zfs_vdev_cache_bshift",
518 "zfs_vdev_cache_max",
519 "zfs_vdev_cache_size",
520 "zfs_vdev_max_active",
521 "zfs_vdev_queue_depth_pct",
522 "zfs_vdev_read_gap_limit",
523 "zfs_vdev_removal_max_active",
524 "zfs_vdev_removal_min_active",
525 "zfs_vdev_scrub_max_active",
526 "zfs_vdev_scrub_min_active",
527 "zfs_vdev_sync_read_max_active",
528 "zfs_vdev_sync_read_min_active",
529 "zfs_vdev_sync_write_max_active",
530 "zfs_vdev_sync_write_min_active",
531 "zfs_vdev_write_gap_limit",
532 "zfs_write_implies_delete_child",
533 "zfs_zil_clean_taskq_maxalloc",
534 "zfs_zil_clean_taskq_minalloc",
535 "zfs_zil_clean_taskq_nthr_pct",
536 "zil_replay_disable",
537 "zil_slog_bulk",
538 "zio_buf_debug_limit",
539 "zio_dva_throttle_enabled",
540 "zio_injection_enabled",
541 "zvol_immediate_write_sz",
542 "zvol_maxphys",
543 "zvol_unmap_enabled",
544 "zvol_unmap_sync_enabled",
545 "zfs_max_dataset_nesting",
546 };
547
548 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) {
549 int sz;
550 uint64_t val64;
551 uint32_t *val32p = (uint32_t *)&val64;
552
553 sz = mdb_readvar(&val64, params[i]);
554 if (sz == 4) {
555 mdb_printf("%s = 0x%x\n", params[i], *val32p);
556 } else if (sz == 8) {
557 mdb_printf("%s = 0x%llx\n", params[i], val64);
558 } else {
559 mdb_warn("variable %s not found", params[i]);
560 }
561 }
562
563 return (DCMD_OK);
564 }
565
566 /* ARGSUSED */
567 static int
dva(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)568 dva(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
569 {
570 dva_t dva;
571 if (mdb_vread(&dva, sizeof (dva_t), addr) == -1) {
572 mdb_warn("failed to read dva_t");
573 return (DCMD_ERR);
574 }
575 mdb_printf("<%llu:%llx:%llx>\n",
576 (u_longlong_t)DVA_GET_VDEV(&dva),
577 (u_longlong_t)DVA_GET_OFFSET(&dva),
578 (u_longlong_t)DVA_GET_ASIZE(&dva));
579
580 return (DCMD_OK);
581 }
582
583 typedef struct mdb_dmu_object_type_info {
584 boolean_t ot_encrypt;
585 } mdb_dmu_object_type_info_t;
586
587 static boolean_t
mdb_dmu_ot_is_encrypted_impl(dmu_object_type_t ot)588 mdb_dmu_ot_is_encrypted_impl(dmu_object_type_t ot)
589 {
590 mdb_dmu_object_type_info_t mdoti;
591 GElf_Sym sym;
592 size_t sz = mdb_ctf_sizeof_by_name("dmu_object_type_info_t");
593
594 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "dmu_ot", &sym)) {
595 mdb_warn("failed to find " ZFS_OBJ_NAME "`dmu_ot");
596 return (B_FALSE);
597 }
598
599 if (mdb_ctf_vread(&mdoti, "dmu_object_type_info_t",
600 "mdb_dmu_object_type_info_t", sym.st_value + sz * ot, 0) != 0) {
601 return (B_FALSE);
602 }
603
604 return (mdoti.ot_encrypt);
605 }
606
607 /* ARGSUSED */
608 static int
blkptr(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)609 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
610 {
611 char type[80], checksum[80], compress[80];
612 blkptr_t blk, *bp = &blk;
613 char buf[BP_SPRINTF_LEN];
614
615 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) {
616 mdb_warn("failed to read blkptr_t");
617 return (DCMD_ERR);
618 }
619
620 if (enum_lookup("enum dmu_object_type", BP_GET_TYPE(bp), "DMU_OT_",
621 sizeof (type), type) == -1 ||
622 enum_lookup("enum zio_checksum", BP_GET_CHECKSUM(bp),
623 "ZIO_CHECKSUM_", sizeof (checksum), checksum) == -1 ||
624 enum_lookup("enum zio_compress", BP_GET_COMPRESS(bp),
625 "ZIO_COMPRESS_", sizeof (compress), compress) == -1) {
626 mdb_warn("Could not find blkptr enumerated types");
627 return (DCMD_ERR);
628 }
629
630 SNPRINTF_BLKPTR(mdb_snprintf, '\n', buf, sizeof (buf), bp, type,
631 checksum, compress);
632
633 mdb_printf("%s\n", buf);
634
635 return (DCMD_OK);
636 }
637
638 typedef struct mdb_dmu_buf_impl {
639 struct {
640 uint64_t db_object;
641 uintptr_t db_data;
642 } db;
643 uintptr_t db_objset;
644 uint64_t db_level;
645 uint64_t db_blkid;
646 struct {
647 uint64_t rc_count;
648 } db_holds;
649 } mdb_dmu_buf_impl_t;
650
651 /* ARGSUSED */
652 static int
dbuf(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)653 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
654 {
655 mdb_dmu_buf_impl_t db;
656 char objectname[32];
657 char blkidname[32];
658 char path[ZFS_MAX_DATASET_NAME_LEN];
659 int ptr_width = (int)(sizeof (void *)) * 2;
660
661 if (DCMD_HDRSPEC(flags))
662 mdb_printf("%*s %8s %3s %9s %5s %s\n",
663 ptr_width, "addr", "object", "lvl", "blkid", "holds", "os");
664
665 if (mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
666 addr, 0) == -1)
667 return (DCMD_ERR);
668
669 if (db.db.db_object == DMU_META_DNODE_OBJECT)
670 (void) strcpy(objectname, "mdn");
671 else
672 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx",
673 (u_longlong_t)db.db.db_object);
674
675 if (db.db_blkid == DMU_BONUS_BLKID)
676 (void) strcpy(blkidname, "bonus");
677 else
678 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx",
679 (u_longlong_t)db.db_blkid);
680
681 if (objset_name(db.db_objset, path)) {
682 return (DCMD_ERR);
683 }
684
685 mdb_printf("%*p %8s %3u %9s %5llu %s\n", ptr_width, addr,
686 objectname, (int)db.db_level, blkidname,
687 db.db_holds.rc_count, path);
688
689 return (DCMD_OK);
690 }
691
692 /* ARGSUSED */
693 static int
dbuf_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)694 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
695 {
696 #define HISTOSZ 32
697 uintptr_t dbp;
698 dmu_buf_impl_t db;
699 dbuf_hash_table_t ht;
700 uint64_t bucket, ndbufs;
701 uint64_t histo[HISTOSZ];
702 uint64_t histo2[HISTOSZ];
703 int i, maxidx;
704
705 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) {
706 mdb_warn("failed to read 'dbuf_hash_table'");
707 return (DCMD_ERR);
708 }
709
710 for (i = 0; i < HISTOSZ; i++) {
711 histo[i] = 0;
712 histo2[i] = 0;
713 }
714
715 ndbufs = 0;
716 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) {
717 int len;
718
719 if (mdb_vread(&dbp, sizeof (void *),
720 (uintptr_t)(ht.hash_table+bucket)) == -1) {
721 mdb_warn("failed to read hash bucket %u at %p",
722 bucket, ht.hash_table+bucket);
723 return (DCMD_ERR);
724 }
725
726 len = 0;
727 while (dbp != 0) {
728 if (mdb_vread(&db, sizeof (dmu_buf_impl_t),
729 dbp) == -1) {
730 mdb_warn("failed to read dbuf at %p", dbp);
731 return (DCMD_ERR);
732 }
733 dbp = (uintptr_t)db.db_hash_next;
734 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--)
735 histo2[i]++;
736 len++;
737 ndbufs++;
738 }
739
740 if (len >= HISTOSZ)
741 len = HISTOSZ-1;
742 histo[len]++;
743 }
744
745 mdb_printf("hash table has %llu buckets, %llu dbufs "
746 "(avg %llu buckets/dbuf)\n",
747 ht.hash_table_mask+1, ndbufs,
748 (ht.hash_table_mask+1)/ndbufs);
749
750 mdb_printf("\n");
751 maxidx = 0;
752 for (i = 0; i < HISTOSZ; i++)
753 if (histo[i] > 0)
754 maxidx = i;
755 mdb_printf("hash chain length number of buckets\n");
756 for (i = 0; i <= maxidx; i++)
757 mdb_printf("%u %llu\n", i, histo[i]);
758
759 mdb_printf("\n");
760 maxidx = 0;
761 for (i = 0; i < HISTOSZ; i++)
762 if (histo2[i] > 0)
763 maxidx = i;
764 mdb_printf("hash chain depth number of dbufs\n");
765 for (i = 0; i <= maxidx; i++)
766 mdb_printf("%u or more %llu %llu%%\n",
767 i, histo2[i], histo2[i]*100/ndbufs);
768
769
770 return (DCMD_OK);
771 }
772
773 #define CHAIN_END 0xffff
774 /*
775 * ::zap_leaf [-v]
776 *
777 * Print a zap_leaf_phys_t, assumed to be 16k
778 */
779 /* ARGSUSED */
780 static int
zap_leaf(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)781 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
782 {
783 char buf[16*1024];
784 int verbose = B_FALSE;
785 int four = B_FALSE;
786 dmu_buf_t l_dbuf;
787 zap_leaf_t l;
788 zap_leaf_phys_t *zlp = (void *)buf;
789 int i;
790
791 if (mdb_getopts(argc, argv,
792 'v', MDB_OPT_SETBITS, TRUE, &verbose,
793 '4', MDB_OPT_SETBITS, TRUE, &four,
794 NULL) != argc)
795 return (DCMD_USAGE);
796
797 l_dbuf.db_data = zlp;
798 l.l_dbuf = &l_dbuf;
799 l.l_bs = 14; /* assume 16k blocks */
800 if (four)
801 l.l_bs = 12;
802
803 if (!(flags & DCMD_ADDRSPEC)) {
804 return (DCMD_USAGE);
805 }
806
807 if (mdb_vread(buf, sizeof (buf), addr) == -1) {
808 mdb_warn("failed to read zap_leaf_phys_t at %p", addr);
809 return (DCMD_ERR);
810 }
811
812 if (zlp->l_hdr.lh_block_type != ZBT_LEAF ||
813 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) {
814 mdb_warn("This does not appear to be a zap_leaf_phys_t");
815 return (DCMD_ERR);
816 }
817
818 mdb_printf("zap_leaf_phys_t at %p:\n", addr);
819 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len);
820 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix);
821 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries);
822 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree,
823 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l)));
824 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist);
825 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags,
826 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ?
827 "ENTRIES_CDSORTED" : "");
828
829 if (verbose) {
830 mdb_printf(" hash table:\n");
831 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) {
832 if (zlp->l_hash[i] != CHAIN_END)
833 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]);
834 }
835 }
836
837 mdb_printf(" chunks:\n");
838 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) {
839 /* LINTED: alignment */
840 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i);
841 switch (zlc->l_entry.le_type) {
842 case ZAP_CHUNK_FREE:
843 if (verbose) {
844 mdb_printf(" %u: free; lf_next = %u\n",
845 i, zlc->l_free.lf_next);
846 }
847 break;
848 case ZAP_CHUNK_ENTRY:
849 mdb_printf(" %u: entry\n", i);
850 if (verbose) {
851 mdb_printf(" le_next = %u\n",
852 zlc->l_entry.le_next);
853 }
854 mdb_printf(" le_name_chunk = %u\n",
855 zlc->l_entry.le_name_chunk);
856 mdb_printf(" le_name_numints = %u\n",
857 zlc->l_entry.le_name_numints);
858 mdb_printf(" le_value_chunk = %u\n",
859 zlc->l_entry.le_value_chunk);
860 mdb_printf(" le_value_intlen = %u\n",
861 zlc->l_entry.le_value_intlen);
862 mdb_printf(" le_value_numints = %u\n",
863 zlc->l_entry.le_value_numints);
864 mdb_printf(" le_cd = %u\n",
865 zlc->l_entry.le_cd);
866 mdb_printf(" le_hash = %llx\n",
867 zlc->l_entry.le_hash);
868 break;
869 case ZAP_CHUNK_ARRAY:
870 mdb_printf(" %u: array", i);
871 if (strisprint((char *)zlc->l_array.la_array))
872 mdb_printf(" \"%s\"", zlc->l_array.la_array);
873 mdb_printf("\n");
874 if (verbose) {
875 int j;
876 mdb_printf(" ");
877 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) {
878 mdb_printf("%02x ",
879 zlc->l_array.la_array[j]);
880 }
881 mdb_printf("\n");
882 }
883 if (zlc->l_array.la_next != CHAIN_END) {
884 mdb_printf(" lf_next = %u\n",
885 zlc->l_array.la_next);
886 }
887 break;
888 default:
889 mdb_printf(" %u: undefined type %u\n",
890 zlc->l_entry.le_type);
891 }
892 }
893
894 return (DCMD_OK);
895 }
896
897 typedef struct dbufs_data {
898 mdb_ctf_id_t id;
899 uint64_t objset;
900 uint64_t object;
901 uint64_t level;
902 uint64_t blkid;
903 char *osname;
904 } dbufs_data_t;
905
906 #define DBUFS_UNSET (0xbaddcafedeadbeefULL)
907
908 /* ARGSUSED */
909 static int
dbufs_cb(uintptr_t addr,const void * unknown,void * arg)910 dbufs_cb(uintptr_t addr, const void *unknown, void *arg)
911 {
912 dbufs_data_t *data = arg;
913 uintptr_t objset;
914 dmu_buf_t db;
915 uint8_t level;
916 uint64_t blkid;
917 char osname[ZFS_MAX_DATASET_NAME_LEN];
918
919 if (GETMEMBID(addr, &data->id, db_objset, objset) ||
920 GETMEMBID(addr, &data->id, db, db) ||
921 GETMEMBID(addr, &data->id, db_level, level) ||
922 GETMEMBID(addr, &data->id, db_blkid, blkid)) {
923 return (WALK_ERR);
924 }
925
926 if ((data->objset == DBUFS_UNSET || data->objset == objset) &&
927 (data->osname == NULL || (objset_name(objset, osname) == 0 &&
928 strcmp(data->osname, osname) == 0)) &&
929 (data->object == DBUFS_UNSET || data->object == db.db_object) &&
930 (data->level == DBUFS_UNSET || data->level == level) &&
931 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) {
932 mdb_printf("%#lr\n", addr);
933 }
934 return (WALK_NEXT);
935 }
936
937 /* ARGSUSED */
938 static int
dbufs(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)939 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
940 {
941 dbufs_data_t data;
942 char *object = NULL;
943 char *blkid = NULL;
944
945 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET;
946 data.osname = NULL;
947
948 if (mdb_getopts(argc, argv,
949 'O', MDB_OPT_UINT64, &data.objset,
950 'n', MDB_OPT_STR, &data.osname,
951 'o', MDB_OPT_STR, &object,
952 'l', MDB_OPT_UINT64, &data.level,
953 'b', MDB_OPT_STR, &blkid,
954 NULL) != argc) {
955 return (DCMD_USAGE);
956 }
957
958 if (object) {
959 if (strcmp(object, "mdn") == 0) {
960 data.object = DMU_META_DNODE_OBJECT;
961 } else {
962 data.object = mdb_strtoull(object);
963 }
964 }
965
966 if (blkid) {
967 if (strcmp(blkid, "bonus") == 0) {
968 data.blkid = DMU_BONUS_BLKID;
969 } else {
970 data.blkid = mdb_strtoull(blkid);
971 }
972 }
973
974 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "dmu_buf_impl", &data.id) == -1) {
975 mdb_warn("couldn't find struct dmu_buf_impl_t");
976 return (DCMD_ERR);
977 }
978
979 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) {
980 mdb_warn("can't walk dbufs");
981 return (DCMD_ERR);
982 }
983
984 return (DCMD_OK);
985 }
986
987 typedef struct abuf_find_data {
988 dva_t dva;
989 mdb_ctf_id_t id;
990 } abuf_find_data_t;
991
992 /* ARGSUSED */
993 static int
abuf_find_cb(uintptr_t addr,const void * unknown,void * arg)994 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg)
995 {
996 abuf_find_data_t *data = arg;
997 dva_t dva;
998
999 if (GETMEMBID(addr, &data->id, b_dva, dva)) {
1000 return (WALK_ERR);
1001 }
1002
1003 if (dva.dva_word[0] == data->dva.dva_word[0] &&
1004 dva.dva_word[1] == data->dva.dva_word[1]) {
1005 mdb_printf("%#lr\n", addr);
1006 }
1007 return (WALK_NEXT);
1008 }
1009
1010 typedef struct mdb_arc_state {
1011 uintptr_t arcs_list[ARC_BUFC_NUMTYPES];
1012 } mdb_arc_state_t;
1013
1014 /* ARGSUSED */
1015 static int
abuf_find(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1016 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1017 {
1018 abuf_find_data_t data;
1019 GElf_Sym sym;
1020 int i, j;
1021 const char *syms[] = {
1022 "ARC_mru",
1023 "ARC_mru_ghost",
1024 "ARC_mfu",
1025 "ARC_mfu_ghost",
1026 };
1027
1028 if (argc != 2)
1029 return (DCMD_USAGE);
1030
1031 for (i = 0; i < 2; i ++) {
1032 switch (argv[i].a_type) {
1033 case MDB_TYPE_STRING:
1034 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str);
1035 break;
1036 case MDB_TYPE_IMMEDIATE:
1037 data.dva.dva_word[i] = argv[i].a_un.a_val;
1038 break;
1039 default:
1040 return (DCMD_USAGE);
1041 }
1042 }
1043
1044 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "arc_buf_hdr", &data.id) == -1) {
1045 mdb_warn("couldn't find struct arc_buf_hdr");
1046 return (DCMD_ERR);
1047 }
1048
1049 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) {
1050 mdb_arc_state_t mas;
1051
1052 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, syms[i], &sym)) {
1053 mdb_warn("can't find symbol %s", syms[i]);
1054 return (DCMD_ERR);
1055 }
1056
1057 if (mdb_ctf_vread(&mas, "arc_state_t", "mdb_arc_state_t",
1058 sym.st_value, 0) != 0) {
1059 mdb_warn("can't read arcs_list of %s", syms[i]);
1060 return (DCMD_ERR);
1061 }
1062
1063 for (j = 0; j < ARC_BUFC_NUMTYPES; j++) {
1064 uintptr_t addr = mas.arcs_list[j];
1065
1066 if (addr == 0)
1067 continue;
1068
1069 if (mdb_pwalk("multilist", abuf_find_cb, &data,
1070 addr) != 0) {
1071 mdb_warn("can't walk %s", syms[i]);
1072 return (DCMD_ERR);
1073 }
1074 }
1075 }
1076
1077 return (DCMD_OK);
1078 }
1079
1080
1081 typedef struct dbgmsg_arg {
1082 boolean_t da_verbose;
1083 boolean_t da_verbose_hr;
1084 boolean_t da_address;
1085 } dbgmsg_arg_t;
1086
1087 /* ARGSUSED */
1088 static int
dbgmsg_cb(uintptr_t addr,const void * unknown,void * arg)1089 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg)
1090 {
1091 static mdb_ctf_id_t id;
1092 static boolean_t gotid;
1093 static ulong_t off;
1094
1095 dbgmsg_arg_t *da = arg;
1096 time_t timestamp;
1097 hrtime_t hrtime;
1098 char buf[1024];
1099
1100 if (!gotid) {
1101 if (mdb_ctf_lookup_by_name(ZFS_STRUCT "zfs_dbgmsg", &id) ==
1102 -1) {
1103 mdb_warn("couldn't find struct zfs_dbgmsg");
1104 return (WALK_ERR);
1105 }
1106 gotid = TRUE;
1107 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) {
1108 mdb_warn("couldn't find zdm_msg");
1109 return (WALK_ERR);
1110 }
1111 off /= 8;
1112 }
1113
1114
1115 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) {
1116 return (WALK_ERR);
1117 }
1118
1119 if (da->da_verbose_hr) {
1120 if (GETMEMBID(addr, &id, zdm_hrtime, hrtime)) {
1121 return (WALK_ERR);
1122 }
1123 }
1124
1125 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) {
1126 mdb_warn("failed to read zdm_msg at %p\n", addr + off);
1127 return (DCMD_ERR);
1128 }
1129
1130 if (da->da_address)
1131 mdb_printf("%p ", addr);
1132 if (da->da_verbose)
1133 mdb_printf("%Y ", timestamp);
1134 if (da->da_verbose_hr)
1135 mdb_printf("%016x ", hrtime);
1136
1137 mdb_printf("%s\n", buf);
1138
1139 if (da->da_verbose || da->da_verbose_hr)
1140 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
1141
1142 return (WALK_NEXT);
1143 }
1144
1145 /* ARGSUSED */
1146 static int
dbgmsg(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1147 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1148 {
1149 GElf_Sym sym;
1150 dbgmsg_arg_t da = { 0 };
1151
1152 if (mdb_getopts(argc, argv,
1153 'v', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose,
1154 'r', MDB_OPT_SETBITS, B_TRUE, &da.da_verbose_hr,
1155 'a', MDB_OPT_SETBITS, B_TRUE, &da.da_address,
1156 NULL) != argc)
1157 return (DCMD_USAGE);
1158
1159 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "zfs_dbgmsgs", &sym)) {
1160 mdb_warn("can't find zfs_dbgmsgs");
1161 return (DCMD_ERR);
1162 }
1163
1164 if (mdb_pwalk("list", dbgmsg_cb, &da, sym.st_value) != 0) {
1165 mdb_warn("can't walk zfs_dbgmsgs");
1166 return (DCMD_ERR);
1167 }
1168
1169 return (DCMD_OK);
1170 }
1171
1172 /*ARGSUSED*/
1173 static int
arc_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1174 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1175 {
1176 kstat_named_t *stats;
1177 GElf_Sym sym;
1178 int nstats, i;
1179 uint_t opt_a = FALSE;
1180 uint_t opt_b = FALSE;
1181 uint_t shift = 0;
1182 const char *suffix;
1183
1184 static const char *bytestats[] = {
1185 "p", "c", "c_min", "c_max", "size", "duplicate_buffers_size",
1186 "arc_meta_used", "arc_meta_limit", "arc_meta_max",
1187 "arc_meta_min", "hdr_size", "data_size", "metadata_size",
1188 "other_size", "anon_size", "anon_evictable_data",
1189 "anon_evictable_metadata", "mru_size", "mru_evictable_data",
1190 "mru_evictable_metadata", "mru_ghost_size",
1191 "mru_ghost_evictable_data", "mru_ghost_evictable_metadata",
1192 "mfu_size", "mfu_evictable_data", "mfu_evictable_metadata",
1193 "mfu_ghost_size", "mfu_ghost_evictable_data",
1194 "mfu_ghost_evictable_metadata", "evict_l2_cached",
1195 "evict_l2_eligible", "evict_l2_ineligible", "l2_read_bytes",
1196 "l2_write_bytes", "l2_size", "l2_asize", "l2_hdr_size",
1197 "compressed_size", "uncompressed_size", "overhead_size",
1198 NULL
1199 };
1200
1201 static const char *extras[] = {
1202 "arc_no_grow", "arc_tempreserve",
1203 NULL
1204 };
1205
1206 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "arc_stats", &sym) == -1) {
1207 mdb_warn("failed to find 'arc_stats'");
1208 return (DCMD_ERR);
1209 }
1210
1211 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC);
1212
1213 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) {
1214 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value);
1215 return (DCMD_ERR);
1216 }
1217
1218 nstats = sym.st_size / sizeof (kstat_named_t);
1219
1220 /* NB: -a / opt_a are ignored for backwards compatability */
1221 if (mdb_getopts(argc, argv,
1222 'a', MDB_OPT_SETBITS, TRUE, &opt_a,
1223 'b', MDB_OPT_SETBITS, TRUE, &opt_b,
1224 'k', MDB_OPT_SETBITS, 10, &shift,
1225 'm', MDB_OPT_SETBITS, 20, &shift,
1226 'g', MDB_OPT_SETBITS, 30, &shift,
1227 NULL) != argc)
1228 return (DCMD_USAGE);
1229
1230 if (!opt_b && !shift)
1231 shift = 20;
1232
1233 switch (shift) {
1234 case 0:
1235 suffix = "B";
1236 break;
1237 case 10:
1238 suffix = "KB";
1239 break;
1240 case 20:
1241 suffix = "MB";
1242 break;
1243 case 30:
1244 suffix = "GB";
1245 break;
1246 default:
1247 suffix = "XX";
1248 }
1249
1250 for (i = 0; i < nstats; i++) {
1251 int j;
1252 boolean_t bytes = B_FALSE;
1253
1254 for (j = 0; bytestats[j]; j++) {
1255 if (strcmp(stats[i].name, bytestats[j]) == 0) {
1256 bytes = B_TRUE;
1257 break;
1258 }
1259 }
1260
1261 if (bytes) {
1262 mdb_printf("%-25s = %9llu %s\n", stats[i].name,
1263 stats[i].value.ui64 >> shift, suffix);
1264 } else {
1265 mdb_printf("%-25s = %9llu\n", stats[i].name,
1266 stats[i].value.ui64);
1267 }
1268 }
1269
1270 for (i = 0; extras[i]; i++) {
1271 uint64_t buf;
1272
1273 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, extras[i], &sym) == -1) {
1274 mdb_warn("failed to find '%s'", extras[i]);
1275 return (DCMD_ERR);
1276 }
1277
1278 if (sym.st_size != sizeof (uint64_t) &&
1279 sym.st_size != sizeof (uint32_t)) {
1280 mdb_warn("expected scalar for variable '%s'\n",
1281 extras[i]);
1282 return (DCMD_ERR);
1283 }
1284
1285 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) {
1286 mdb_warn("couldn't read '%s'", extras[i]);
1287 return (DCMD_ERR);
1288 }
1289
1290 mdb_printf("%-25s = ", extras[i]);
1291
1292 /* NB: all the 64-bit extras happen to be byte counts */
1293 if (sym.st_size == sizeof (uint64_t))
1294 mdb_printf("%9llu %s\n", buf >> shift, suffix);
1295
1296 if (sym.st_size == sizeof (uint32_t))
1297 mdb_printf("%9d\n", *((uint32_t *)&buf));
1298 }
1299 return (DCMD_OK);
1300 }
1301
1302 typedef struct mdb_spa_print {
1303 pool_state_t spa_state;
1304 char spa_name[ZFS_MAX_DATASET_NAME_LEN];
1305 uintptr_t spa_normal_class;
1306 } mdb_spa_print_t;
1307
1308
1309 const char histo_stars[] = "****************************************";
1310 const int histo_width = sizeof (histo_stars) - 1;
1311
1312 static void
dump_histogram(const uint64_t * histo,int size,int offset)1313 dump_histogram(const uint64_t *histo, int size, int offset)
1314 {
1315 int i;
1316 int minidx = size - 1;
1317 int maxidx = 0;
1318 uint64_t max = 0;
1319
1320 for (i = 0; i < size; i++) {
1321 if (histo[i] > max)
1322 max = histo[i];
1323 if (histo[i] > 0 && i > maxidx)
1324 maxidx = i;
1325 if (histo[i] > 0 && i < minidx)
1326 minidx = i;
1327 }
1328
1329 if (max < histo_width)
1330 max = histo_width;
1331
1332 for (i = minidx; i <= maxidx; i++) {
1333 mdb_printf("%3u: %6llu %s\n",
1334 i + offset, (u_longlong_t)histo[i],
1335 &histo_stars[(max - histo[i]) * histo_width / max]);
1336 }
1337 }
1338
1339 typedef struct mdb_metaslab_class {
1340 uint64_t mc_histogram[RANGE_TREE_HISTOGRAM_SIZE];
1341 } mdb_metaslab_class_t;
1342
1343 /*
1344 * spa_class_histogram(uintptr_t class_addr)
1345 *
1346 * Prints free space histogram for a device class
1347 *
1348 * Returns DCMD_OK, or DCMD_ERR.
1349 */
1350 static int
spa_class_histogram(uintptr_t class_addr)1351 spa_class_histogram(uintptr_t class_addr)
1352 {
1353 mdb_metaslab_class_t mc;
1354 if (mdb_ctf_vread(&mc, "metaslab_class_t",
1355 "mdb_metaslab_class_t", class_addr, 0) == -1)
1356 return (DCMD_ERR);
1357
1358 mdb_inc_indent(4);
1359 dump_histogram(mc.mc_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1360 mdb_dec_indent(4);
1361 return (DCMD_OK);
1362 }
1363
1364 /*
1365 * ::spa
1366 *
1367 * -c Print configuration information as well
1368 * -v Print vdev state
1369 * -e Print vdev error stats
1370 * -m Print vdev metaslab info
1371 * -M print vdev metaslab group info
1372 * -h Print histogram info (must be combined with -m or -M)
1373 *
1374 * Print a summarized spa_t. When given no arguments, prints out a table of all
1375 * active pools on the system.
1376 */
1377 /* ARGSUSED */
1378 static int
spa_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1379 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1380 {
1381 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED",
1382 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" };
1383 const char *state;
1384 int spa_flags = 0;
1385
1386 if (mdb_getopts(argc, argv,
1387 'c', MDB_OPT_SETBITS, SPA_FLAG_CONFIG, &spa_flags,
1388 'v', MDB_OPT_SETBITS, SPA_FLAG_VDEVS, &spa_flags,
1389 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1390 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1391 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1392 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1393 NULL) != argc)
1394 return (DCMD_USAGE);
1395
1396 if (!(flags & DCMD_ADDRSPEC)) {
1397 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) {
1398 mdb_warn("can't walk spa");
1399 return (DCMD_ERR);
1400 }
1401
1402 return (DCMD_OK);
1403 }
1404
1405 if (flags & DCMD_PIPE_OUT) {
1406 mdb_printf("%#lr\n", addr);
1407 return (DCMD_OK);
1408 }
1409
1410 if (DCMD_HDRSPEC(flags))
1411 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE",
1412 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME");
1413
1414 mdb_spa_print_t spa;
1415 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_print_t", addr, 0) == -1)
1416 return (DCMD_ERR);
1417
1418 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL)
1419 state = "UNKNOWN";
1420 else
1421 state = statetab[spa.spa_state];
1422
1423 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name);
1424 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1425 spa_class_histogram(spa.spa_normal_class);
1426
1427 if (spa_flags & SPA_FLAG_CONFIG) {
1428 mdb_printf("\n");
1429 mdb_inc_indent(4);
1430 if (mdb_call_dcmd("spa_config", addr, flags, 0,
1431 NULL) != DCMD_OK)
1432 return (DCMD_ERR);
1433 mdb_dec_indent(4);
1434 }
1435
1436 if (spa_flags & SPA_FLAG_ALL_VDEV) {
1437 mdb_arg_t v;
1438 char opts[100] = "-";
1439 int args =
1440 (spa_flags | SPA_FLAG_VDEVS) == SPA_FLAG_VDEVS ? 0 : 1;
1441
1442 if (spa_flags & SPA_FLAG_ERRORS)
1443 strcat(opts, "e");
1444 if (spa_flags & SPA_FLAG_METASLABS)
1445 strcat(opts, "m");
1446 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
1447 strcat(opts, "M");
1448 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1449 strcat(opts, "h");
1450
1451 v.a_type = MDB_TYPE_STRING;
1452 v.a_un.a_str = opts;
1453
1454 mdb_printf("\n");
1455 mdb_inc_indent(4);
1456 if (mdb_call_dcmd("spa_vdevs", addr, flags, args,
1457 &v) != DCMD_OK)
1458 return (DCMD_ERR);
1459 mdb_dec_indent(4);
1460 }
1461
1462 return (DCMD_OK);
1463 }
1464
1465 typedef struct mdb_spa_config_spa {
1466 uintptr_t spa_config;
1467 } mdb_spa_config_spa_t;
1468
1469 /*
1470 * ::spa_config
1471 *
1472 * Given a spa_t, print the configuration information stored in spa_config.
1473 * Since it's just an nvlist, format it as an indented list of name=value pairs.
1474 * We simply read the value of spa_config and pass off to ::nvlist.
1475 */
1476 /* ARGSUSED */
1477 static int
spa_print_config(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1478 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1479 {
1480 mdb_spa_config_spa_t spa;
1481
1482 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1483 return (DCMD_USAGE);
1484
1485 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_config_spa_t",
1486 addr, 0) == -1)
1487 return (DCMD_ERR);
1488
1489 if (spa.spa_config == 0) {
1490 mdb_printf("(none)\n");
1491 return (DCMD_OK);
1492 }
1493
1494 return (mdb_call_dcmd("nvlist", spa.spa_config, flags,
1495 0, NULL));
1496 }
1497
1498 typedef struct mdb_range_tree {
1499 struct {
1500 uint64_t bt_num_elems;
1501 uint64_t bt_num_nodes;
1502 } rt_root;
1503 uint64_t rt_space;
1504 range_seg_type_t rt_type;
1505 uint8_t rt_shift;
1506 uint64_t rt_start;
1507 } mdb_range_tree_t;
1508
1509 typedef struct mdb_metaslab_group {
1510 uint64_t mg_fragmentation;
1511 uint64_t mg_histogram[RANGE_TREE_HISTOGRAM_SIZE];
1512 uintptr_t mg_vd;
1513 } mdb_metaslab_group_t;
1514
1515 typedef struct mdb_metaslab {
1516 uint64_t ms_id;
1517 uint64_t ms_start;
1518 uint64_t ms_size;
1519 int64_t ms_deferspace;
1520 uint64_t ms_fragmentation;
1521 uint64_t ms_weight;
1522 uintptr_t ms_allocating[TXG_SIZE];
1523 uintptr_t ms_checkpointing;
1524 uintptr_t ms_freeing;
1525 uintptr_t ms_freed;
1526 uintptr_t ms_allocatable;
1527 uintptr_t ms_unflushed_frees;
1528 uintptr_t ms_unflushed_allocs;
1529 uintptr_t ms_sm;
1530 } mdb_metaslab_t;
1531
1532 typedef struct mdb_space_map_phys_t {
1533 int64_t smp_alloc;
1534 uint64_t smp_histogram[SPACE_MAP_HISTOGRAM_SIZE];
1535 } mdb_space_map_phys_t;
1536
1537 typedef struct mdb_space_map {
1538 uint64_t sm_size;
1539 uint8_t sm_shift;
1540 uintptr_t sm_phys;
1541 } mdb_space_map_t;
1542
1543 typedef struct mdb_vdev {
1544 uint64_t vdev_id;
1545 uint64_t vdev_state;
1546 uintptr_t vdev_ops;
1547 struct {
1548 uint64_t vs_aux;
1549 uint64_t vs_ops[VS_ZIO_TYPES];
1550 uint64_t vs_bytes[VS_ZIO_TYPES];
1551 uint64_t vs_read_errors;
1552 uint64_t vs_write_errors;
1553 uint64_t vs_checksum_errors;
1554 } vdev_stat;
1555 uintptr_t vdev_child;
1556 uint64_t vdev_children;
1557 uint64_t vdev_ms_count;
1558 uintptr_t vdev_mg;
1559 uintptr_t vdev_ms;
1560 uintptr_t vdev_path;
1561 } mdb_vdev_t;
1562
1563 typedef struct mdb_vdev_ops {
1564 char vdev_op_type[16];
1565 } mdb_vdev_ops_t;
1566
1567 static int
metaslab_stats(mdb_vdev_t * vd,int spa_flags)1568 metaslab_stats(mdb_vdev_t *vd, int spa_flags)
1569 {
1570 mdb_inc_indent(4);
1571 mdb_printf("%<u>%-?s %6s %20s %10s %10s %10s%</u>\n", "ADDR", "ID",
1572 "OFFSET", "FREE", "FRAG", "UCMU");
1573
1574 uintptr_t *vdev_ms = mdb_alloc(vd->vdev_ms_count * sizeof (vdev_ms),
1575 UM_SLEEP | UM_GC);
1576 if (mdb_vread(vdev_ms, vd->vdev_ms_count * sizeof (uintptr_t),
1577 vd->vdev_ms) == -1) {
1578 mdb_warn("failed to read vdev_ms at %p\n", vd->vdev_ms);
1579 return (DCMD_ERR);
1580 }
1581
1582 for (int m = 0; m < vd->vdev_ms_count; m++) {
1583 mdb_metaslab_t ms;
1584 mdb_space_map_t sm = { 0 };
1585 mdb_space_map_phys_t smp = { 0 };
1586 mdb_range_tree_t rt;
1587 uint64_t uallocs, ufrees, raw_free, raw_uchanges_mem;
1588 char free[MDB_NICENUM_BUFLEN];
1589 char uchanges_mem[MDB_NICENUM_BUFLEN];
1590
1591 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1592 vdev_ms[m], 0) == -1)
1593 return (DCMD_ERR);
1594
1595 if (ms.ms_sm != 0 &&
1596 mdb_ctf_vread(&sm, "space_map_t", "mdb_space_map_t",
1597 ms.ms_sm, 0) == -1)
1598 return (DCMD_ERR);
1599
1600 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t",
1601 ms.ms_unflushed_frees, 0) == -1)
1602 return (DCMD_ERR);
1603 ufrees = rt.rt_space;
1604 raw_uchanges_mem = rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE;
1605
1606 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t",
1607 ms.ms_unflushed_allocs, 0) == -1)
1608 return (DCMD_ERR);
1609 uallocs = rt.rt_space;
1610 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE;
1611 mdb_nicenum(raw_uchanges_mem, uchanges_mem);
1612
1613 raw_free = ms.ms_size;
1614 if (ms.ms_sm != 0 && sm.sm_phys != 0) {
1615 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
1616 "mdb_space_map_phys_t", sm.sm_phys, 0);
1617 raw_free -= smp.smp_alloc;
1618 }
1619 raw_free += ufrees - uallocs;
1620 mdb_nicenum(raw_free, free);
1621
1622 mdb_printf("%0?p %6llu %20llx %10s ", vdev_ms[m], ms.ms_id,
1623 ms.ms_start, free);
1624 if (ms.ms_fragmentation == ZFS_FRAG_INVALID)
1625 mdb_printf("%9s ", "-");
1626 else
1627 mdb_printf("%9llu%% ", ms.ms_fragmentation);
1628 mdb_printf("%10s\n", uchanges_mem);
1629
1630 if ((spa_flags & SPA_FLAG_HISTOGRAMS) && ms.ms_sm != 0 &&
1631 sm.sm_phys != 0) {
1632 dump_histogram(smp.smp_histogram,
1633 SPACE_MAP_HISTOGRAM_SIZE, sm.sm_shift);
1634 }
1635 }
1636 mdb_dec_indent(4);
1637 return (DCMD_OK);
1638 }
1639
1640 static int
metaslab_group_stats(mdb_vdev_t * vd,int spa_flags)1641 metaslab_group_stats(mdb_vdev_t *vd, int spa_flags)
1642 {
1643 mdb_metaslab_group_t mg;
1644 if (mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t",
1645 vd->vdev_mg, 0) == -1) {
1646 mdb_warn("failed to read vdev_mg at %p\n", vd->vdev_mg);
1647 return (DCMD_ERR);
1648 }
1649
1650 mdb_inc_indent(4);
1651 mdb_printf("%<u>%-?s %7s %9s%</u>\n", "ADDR", "FRAG", "UCMU");
1652
1653 if (mg.mg_fragmentation == ZFS_FRAG_INVALID)
1654 mdb_printf("%0?p %6s\n", vd->vdev_mg, "-");
1655 else
1656 mdb_printf("%0?p %6llu%%", vd->vdev_mg, mg.mg_fragmentation);
1657
1658
1659 uintptr_t *vdev_ms = mdb_alloc(vd->vdev_ms_count * sizeof (vdev_ms),
1660 UM_SLEEP | UM_GC);
1661 if (mdb_vread(vdev_ms, vd->vdev_ms_count * sizeof (uintptr_t),
1662 vd->vdev_ms) == -1) {
1663 mdb_warn("failed to read vdev_ms at %p\n", vd->vdev_ms);
1664 return (DCMD_ERR);
1665 }
1666
1667 uint64_t raw_uchanges_mem = 0;
1668 char uchanges_mem[MDB_NICENUM_BUFLEN];
1669 for (int m = 0; m < vd->vdev_ms_count; m++) {
1670 mdb_metaslab_t ms;
1671 mdb_range_tree_t rt;
1672
1673 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
1674 vdev_ms[m], 0) == -1)
1675 return (DCMD_ERR);
1676
1677 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t",
1678 ms.ms_unflushed_frees, 0) == -1)
1679 return (DCMD_ERR);
1680 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE;
1681
1682 if (mdb_ctf_vread(&rt, "range_tree_t", "mdb_range_tree_t",
1683 ms.ms_unflushed_allocs, 0) == -1)
1684 return (DCMD_ERR);
1685 raw_uchanges_mem += rt.rt_root.bt_num_nodes * BTREE_LEAF_SIZE;
1686 }
1687 mdb_nicenum(raw_uchanges_mem, uchanges_mem);
1688 mdb_printf("%10s\n", uchanges_mem);
1689
1690 if (spa_flags & SPA_FLAG_HISTOGRAMS)
1691 dump_histogram(mg.mg_histogram, RANGE_TREE_HISTOGRAM_SIZE, 0);
1692 mdb_dec_indent(4);
1693 return (DCMD_OK);
1694 }
1695
1696 /*
1697 * ::vdev
1698 *
1699 * Print out a summarized vdev_t, in the following form:
1700 *
1701 * ADDR STATE AUX DESC
1702 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0
1703 *
1704 * If '-r' is specified, recursively visit all children.
1705 *
1706 * With '-e', the statistics associated with the vdev are printed as well.
1707 */
1708 static int
do_print_vdev(uintptr_t addr,int flags,int depth,boolean_t recursive,int spa_flags)1709 do_print_vdev(uintptr_t addr, int flags, int depth, boolean_t recursive,
1710 int spa_flags)
1711 {
1712 mdb_vdev_t vd;
1713 if (mdb_ctf_vread(&vd, "vdev_t", "mdb_vdev_t",
1714 (uintptr_t)addr, 0) == -1)
1715 return (DCMD_ERR);
1716
1717 if (flags & DCMD_PIPE_OUT) {
1718 mdb_printf("%#lr\n", addr);
1719 } else {
1720 char desc[MAXNAMELEN];
1721 if (vd.vdev_path != 0) {
1722 if (mdb_readstr(desc, sizeof (desc),
1723 (uintptr_t)vd.vdev_path) == -1) {
1724 mdb_warn("failed to read vdev_path at %p\n",
1725 vd.vdev_path);
1726 return (DCMD_ERR);
1727 }
1728 } else if (vd.vdev_ops != 0) {
1729 vdev_ops_t ops;
1730 if (mdb_vread(&ops, sizeof (ops),
1731 (uintptr_t)vd.vdev_ops) == -1) {
1732 mdb_warn("failed to read vdev_ops at %p\n",
1733 vd.vdev_ops);
1734 return (DCMD_ERR);
1735 }
1736 (void) strcpy(desc, ops.vdev_op_type);
1737 } else {
1738 (void) strcpy(desc, "<unknown>");
1739 }
1740
1741 if (depth == 0 && DCMD_HDRSPEC(flags))
1742 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n",
1743 "ADDR", "STATE", "AUX",
1744 sizeof (uintptr_t) == 4 ? 43 : 35,
1745 "DESCRIPTION");
1746
1747 mdb_printf("%0?p ", addr);
1748
1749 const char *state, *aux;
1750 switch (vd.vdev_state) {
1751 case VDEV_STATE_CLOSED:
1752 state = "CLOSED";
1753 break;
1754 case VDEV_STATE_OFFLINE:
1755 state = "OFFLINE";
1756 break;
1757 case VDEV_STATE_CANT_OPEN:
1758 state = "CANT_OPEN";
1759 break;
1760 case VDEV_STATE_DEGRADED:
1761 state = "DEGRADED";
1762 break;
1763 case VDEV_STATE_HEALTHY:
1764 state = "HEALTHY";
1765 break;
1766 case VDEV_STATE_REMOVED:
1767 state = "REMOVED";
1768 break;
1769 case VDEV_STATE_FAULTED:
1770 state = "FAULTED";
1771 break;
1772 default:
1773 state = "UNKNOWN";
1774 break;
1775 }
1776
1777 switch (vd.vdev_stat.vs_aux) {
1778 case VDEV_AUX_NONE:
1779 aux = "-";
1780 break;
1781 case VDEV_AUX_OPEN_FAILED:
1782 aux = "OPEN_FAILED";
1783 break;
1784 case VDEV_AUX_CORRUPT_DATA:
1785 aux = "CORRUPT_DATA";
1786 break;
1787 case VDEV_AUX_NO_REPLICAS:
1788 aux = "NO_REPLICAS";
1789 break;
1790 case VDEV_AUX_BAD_GUID_SUM:
1791 aux = "BAD_GUID_SUM";
1792 break;
1793 case VDEV_AUX_TOO_SMALL:
1794 aux = "TOO_SMALL";
1795 break;
1796 case VDEV_AUX_BAD_LABEL:
1797 aux = "BAD_LABEL";
1798 break;
1799 case VDEV_AUX_VERSION_NEWER:
1800 aux = "VERS_NEWER";
1801 break;
1802 case VDEV_AUX_VERSION_OLDER:
1803 aux = "VERS_OLDER";
1804 break;
1805 case VDEV_AUX_UNSUP_FEAT:
1806 aux = "UNSUP_FEAT";
1807 break;
1808 case VDEV_AUX_SPARED:
1809 aux = "SPARED";
1810 break;
1811 case VDEV_AUX_ERR_EXCEEDED:
1812 aux = "ERR_EXCEEDED";
1813 break;
1814 case VDEV_AUX_IO_FAILURE:
1815 aux = "IO_FAILURE";
1816 break;
1817 case VDEV_AUX_BAD_LOG:
1818 aux = "BAD_LOG";
1819 break;
1820 case VDEV_AUX_EXTERNAL:
1821 aux = "EXTERNAL";
1822 break;
1823 case VDEV_AUX_SPLIT_POOL:
1824 aux = "SPLIT_POOL";
1825 break;
1826 case VDEV_AUX_CHILDREN_OFFLINE:
1827 aux = "CHILDREN_OFFLINE";
1828 break;
1829 default:
1830 aux = "UNKNOWN";
1831 break;
1832 }
1833
1834 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc);
1835
1836 if (spa_flags & SPA_FLAG_ERRORS) {
1837 int i;
1838
1839 mdb_inc_indent(4);
1840 mdb_printf("\n");
1841 mdb_printf("%<u> %12s %12s %12s %12s "
1842 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM",
1843 "IOCTL");
1844 mdb_printf("OPS ");
1845 for (i = 1; i < VS_ZIO_TYPES; i++)
1846 mdb_printf("%11#llx%s",
1847 vd.vdev_stat.vs_ops[i],
1848 i == VS_ZIO_TYPES - 1 ? "" : " ");
1849 mdb_printf("\n");
1850 mdb_printf("BYTES ");
1851 for (i = 1; i < VS_ZIO_TYPES; i++)
1852 mdb_printf("%11#llx%s",
1853 vd.vdev_stat.vs_bytes[i],
1854 i == VS_ZIO_TYPES - 1 ? "" : " ");
1855
1856
1857 mdb_printf("\n");
1858 mdb_printf("EREAD %10#llx\n",
1859 vd.vdev_stat.vs_read_errors);
1860 mdb_printf("EWRITE %10#llx\n",
1861 vd.vdev_stat.vs_write_errors);
1862 mdb_printf("ECKSUM %10#llx\n",
1863 vd.vdev_stat.vs_checksum_errors);
1864 mdb_dec_indent(4);
1865 mdb_printf("\n");
1866 }
1867
1868 if ((spa_flags & SPA_FLAG_METASLAB_GROUPS) &&
1869 vd.vdev_mg != 0) {
1870 metaslab_group_stats(&vd, spa_flags);
1871 }
1872 if ((spa_flags & SPA_FLAG_METASLABS) && vd.vdev_ms != 0) {
1873 metaslab_stats(&vd, spa_flags);
1874 }
1875 }
1876
1877 uint64_t children = vd.vdev_children;
1878 if (children == 0 || !recursive)
1879 return (DCMD_OK);
1880
1881 uintptr_t *child = mdb_alloc(children * sizeof (child),
1882 UM_SLEEP | UM_GC);
1883 if (mdb_vread(child, children * sizeof (void *), vd.vdev_child) == -1) {
1884 mdb_warn("failed to read vdev children at %p", vd.vdev_child);
1885 return (DCMD_ERR);
1886 }
1887
1888 for (uint64_t c = 0; c < children; c++) {
1889 if (do_print_vdev(child[c], flags, depth + 2, recursive,
1890 spa_flags)) {
1891 return (DCMD_ERR);
1892 }
1893 }
1894
1895 return (DCMD_OK);
1896 }
1897
1898 static int
vdev_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1899 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1900 {
1901 uint64_t depth = 0;
1902 boolean_t recursive = B_FALSE;
1903 int spa_flags = 0;
1904
1905 if (mdb_getopts(argc, argv,
1906 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
1907 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
1908 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
1909 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
1910 'r', MDB_OPT_SETBITS, TRUE, &recursive,
1911 'd', MDB_OPT_UINT64, &depth, NULL) != argc)
1912 return (DCMD_USAGE);
1913
1914 if (!(flags & DCMD_ADDRSPEC)) {
1915 mdb_warn("no vdev_t address given\n");
1916 return (DCMD_ERR);
1917 }
1918
1919 return (do_print_vdev(addr, flags, (int)depth, recursive, spa_flags));
1920 }
1921
1922 typedef struct mdb_metaslab_alloc_trace {
1923 uintptr_t mat_mg;
1924 uintptr_t mat_msp;
1925 uint64_t mat_size;
1926 uint64_t mat_weight;
1927 uint64_t mat_offset;
1928 uint32_t mat_dva_id;
1929 int mat_allocator;
1930 } mdb_metaslab_alloc_trace_t;
1931
1932 static void
metaslab_print_weight(uint64_t weight)1933 metaslab_print_weight(uint64_t weight)
1934 {
1935 char buf[100];
1936
1937 if (WEIGHT_IS_SPACEBASED(weight)) {
1938 mdb_nicenum(
1939 weight & ~(METASLAB_ACTIVE_MASK | METASLAB_WEIGHT_TYPE),
1940 buf);
1941 } else {
1942 char size[MDB_NICENUM_BUFLEN];
1943 mdb_nicenum(1ULL << WEIGHT_GET_INDEX(weight), size);
1944 (void) mdb_snprintf(buf, sizeof (buf), "%llu x %s",
1945 WEIGHT_GET_COUNT(weight), size);
1946 }
1947 mdb_printf("%11s ", buf);
1948 }
1949
1950 /* ARGSUSED */
1951 static int
metaslab_weight(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1952 metaslab_weight(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1953 {
1954 uint64_t weight = 0;
1955 char active;
1956
1957 if (argc == 0 && (flags & DCMD_ADDRSPEC)) {
1958 if (mdb_vread(&weight, sizeof (uint64_t), addr) == -1) {
1959 mdb_warn("failed to read weight at %p\n", addr);
1960 return (DCMD_ERR);
1961 }
1962 } else if (argc == 1 && !(flags & DCMD_ADDRSPEC)) {
1963 weight = (argv[0].a_type == MDB_TYPE_IMMEDIATE) ?
1964 argv[0].a_un.a_val : mdb_strtoull(argv[0].a_un.a_str);
1965 } else {
1966 return (DCMD_USAGE);
1967 }
1968
1969 if (DCMD_HDRSPEC(flags)) {
1970 mdb_printf("%<u>%-6s %9s %9s%</u>\n",
1971 "ACTIVE", "ALGORITHM", "WEIGHT");
1972 }
1973
1974 if (weight & METASLAB_WEIGHT_PRIMARY)
1975 active = 'P';
1976 else if (weight & METASLAB_WEIGHT_SECONDARY)
1977 active = 'S';
1978 else
1979 active = '-';
1980 mdb_printf("%6c %8s ", active,
1981 WEIGHT_IS_SPACEBASED(weight) ? "SPACE" : "SEGMENT");
1982 metaslab_print_weight(weight);
1983 mdb_printf("\n");
1984
1985 return (DCMD_OK);
1986 }
1987
1988 /* ARGSUSED */
1989 static int
metaslab_trace(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1990 metaslab_trace(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1991 {
1992 mdb_metaslab_alloc_trace_t mat;
1993 mdb_metaslab_group_t mg = { 0 };
1994 char result_type[100];
1995
1996 if (mdb_ctf_vread(&mat, "metaslab_alloc_trace_t",
1997 "mdb_metaslab_alloc_trace_t", addr, 0) == -1) {
1998 return (DCMD_ERR);
1999 }
2000
2001 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) {
2002 mdb_printf("%<u>%6s %6s %8s %11s %11s %18s %18s%</u>\n",
2003 "MSID", "DVA", "ASIZE", "ALLOCATOR", "WEIGHT", "RESULT",
2004 "VDEV");
2005 }
2006
2007 if (mat.mat_msp != 0) {
2008 mdb_metaslab_t ms;
2009
2010 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
2011 mat.mat_msp, 0) == -1) {
2012 return (DCMD_ERR);
2013 }
2014 mdb_printf("%6llu ", ms.ms_id);
2015 } else {
2016 mdb_printf("%6s ", "-");
2017 }
2018
2019 mdb_printf("%6d %8llx %11llx ", mat.mat_dva_id, mat.mat_size,
2020 mat.mat_allocator);
2021
2022 metaslab_print_weight(mat.mat_weight);
2023
2024 if ((int64_t)mat.mat_offset < 0) {
2025 if (enum_lookup("enum trace_alloc_type", mat.mat_offset,
2026 "TRACE_", sizeof (result_type), result_type) == -1) {
2027 mdb_warn("Could not find enum for trace_alloc_type");
2028 return (DCMD_ERR);
2029 }
2030 mdb_printf("%18s ", result_type);
2031 } else {
2032 mdb_printf("%<b>%18llx%</b> ", mat.mat_offset);
2033 }
2034
2035 if (mat.mat_mg != 0 &&
2036 mdb_ctf_vread(&mg, "metaslab_group_t", "mdb_metaslab_group_t",
2037 mat.mat_mg, 0) == -1) {
2038 return (DCMD_ERR);
2039 }
2040
2041 if (mg.mg_vd != 0) {
2042 mdb_vdev_t vdev;
2043 char desc[MAXNAMELEN];
2044
2045 if (mdb_ctf_vread(&vdev, "vdev_t", "mdb_vdev_t",
2046 mg.mg_vd, 0) == -1) {
2047 return (DCMD_ERR);
2048 }
2049
2050 if (vdev.vdev_path != 0) {
2051 char path[MAXNAMELEN];
2052
2053 if (mdb_readstr(path, sizeof (path),
2054 vdev.vdev_path) == -1) {
2055 mdb_warn("failed to read vdev_path at %p\n",
2056 vdev.vdev_path);
2057 return (DCMD_ERR);
2058 }
2059 char *slash;
2060 if ((slash = strrchr(path, '/')) != NULL) {
2061 strcpy(desc, slash + 1);
2062 } else {
2063 strcpy(desc, path);
2064 }
2065 } else if (vdev.vdev_ops != 0) {
2066 mdb_vdev_ops_t ops;
2067 if (mdb_ctf_vread(&ops, "vdev_ops_t", "mdb_vdev_ops_t",
2068 vdev.vdev_ops, 0) == -1) {
2069 mdb_warn("failed to read vdev_ops at %p\n",
2070 vdev.vdev_ops);
2071 return (DCMD_ERR);
2072 }
2073 (void) mdb_snprintf(desc, sizeof (desc),
2074 "%s-%llu", ops.vdev_op_type, vdev.vdev_id);
2075 } else {
2076 (void) strcpy(desc, "<unknown>");
2077 }
2078 mdb_printf("%18s\n", desc);
2079 }
2080
2081 return (DCMD_OK);
2082 }
2083
2084 typedef struct metaslab_walk_data {
2085 uint64_t mw_numvdevs;
2086 uintptr_t *mw_vdevs;
2087 int mw_curvdev;
2088 uint64_t mw_nummss;
2089 uintptr_t *mw_mss;
2090 int mw_curms;
2091 } metaslab_walk_data_t;
2092
2093 static int
metaslab_walk_step(mdb_walk_state_t * wsp)2094 metaslab_walk_step(mdb_walk_state_t *wsp)
2095 {
2096 metaslab_walk_data_t *mw = wsp->walk_data;
2097 metaslab_t ms;
2098 uintptr_t msp;
2099
2100 if (mw->mw_curvdev >= mw->mw_numvdevs)
2101 return (WALK_DONE);
2102
2103 if (mw->mw_mss == NULL) {
2104 uintptr_t mssp;
2105 uintptr_t vdevp;
2106
2107 ASSERT(mw->mw_curms == 0);
2108 ASSERT(mw->mw_nummss == 0);
2109
2110 vdevp = mw->mw_vdevs[mw->mw_curvdev];
2111 if (GETMEMB(vdevp, "vdev", vdev_ms, mssp) ||
2112 GETMEMB(vdevp, "vdev", vdev_ms_count, mw->mw_nummss)) {
2113 return (WALK_ERR);
2114 }
2115
2116 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*),
2117 UM_SLEEP | UM_GC);
2118 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*),
2119 mssp) == -1) {
2120 mdb_warn("failed to read vdev_ms at %p", mssp);
2121 return (WALK_ERR);
2122 }
2123 }
2124
2125 if (mw->mw_curms >= mw->mw_nummss) {
2126 mw->mw_mss = NULL;
2127 mw->mw_curms = 0;
2128 mw->mw_nummss = 0;
2129 mw->mw_curvdev++;
2130 return (WALK_NEXT);
2131 }
2132
2133 msp = mw->mw_mss[mw->mw_curms];
2134 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) {
2135 mdb_warn("failed to read metaslab_t at %p", msp);
2136 return (WALK_ERR);
2137 }
2138
2139 mw->mw_curms++;
2140
2141 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata));
2142 }
2143
2144 static int
metaslab_walk_init(mdb_walk_state_t * wsp)2145 metaslab_walk_init(mdb_walk_state_t *wsp)
2146 {
2147 metaslab_walk_data_t *mw;
2148 uintptr_t root_vdevp;
2149 uintptr_t childp;
2150
2151 if (wsp->walk_addr == 0) {
2152 mdb_warn("must supply address of spa_t\n");
2153 return (WALK_ERR);
2154 }
2155
2156 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC);
2157
2158 if (GETMEMB(wsp->walk_addr, "spa", spa_root_vdev, root_vdevp) ||
2159 GETMEMB(root_vdevp, "vdev", vdev_children, mw->mw_numvdevs) ||
2160 GETMEMB(root_vdevp, "vdev", vdev_child, childp)) {
2161 return (DCMD_ERR);
2162 }
2163
2164 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *),
2165 UM_SLEEP | UM_GC);
2166 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *),
2167 childp) == -1) {
2168 mdb_warn("failed to read root vdev children at %p", childp);
2169 return (DCMD_ERR);
2170 }
2171
2172 wsp->walk_data = mw;
2173
2174 return (WALK_NEXT);
2175 }
2176
2177 typedef struct mdb_spa {
2178 uintptr_t spa_dsl_pool;
2179 uintptr_t spa_root_vdev;
2180 } mdb_spa_t;
2181
2182 typedef struct mdb_dsl_pool {
2183 uintptr_t dp_root_dir;
2184 } mdb_dsl_pool_t;
2185
2186 typedef struct mdb_dsl_dir {
2187 uintptr_t dd_dbuf;
2188 int64_t dd_space_towrite[TXG_SIZE];
2189 } mdb_dsl_dir_t;
2190
2191 typedef struct mdb_dsl_dir_phys {
2192 uint64_t dd_used_bytes;
2193 uint64_t dd_compressed_bytes;
2194 uint64_t dd_uncompressed_bytes;
2195 } mdb_dsl_dir_phys_t;
2196
2197 typedef struct space_data {
2198 uint64_t ms_allocating[TXG_SIZE];
2199 uint64_t ms_checkpointing;
2200 uint64_t ms_freeing;
2201 uint64_t ms_freed;
2202 uint64_t ms_unflushed_frees;
2203 uint64_t ms_unflushed_allocs;
2204 uint64_t ms_allocatable;
2205 int64_t ms_deferspace;
2206 uint64_t avail;
2207 } space_data_t;
2208
2209 /* ARGSUSED */
2210 static int
space_cb(uintptr_t addr,const void * unknown,void * arg)2211 space_cb(uintptr_t addr, const void *unknown, void *arg)
2212 {
2213 space_data_t *sd = arg;
2214 mdb_metaslab_t ms;
2215 mdb_range_tree_t rt;
2216 mdb_space_map_t sm = { 0 };
2217 mdb_space_map_phys_t smp = { 0 };
2218 uint64_t uallocs, ufrees;
2219 int i;
2220
2221 if (mdb_ctf_vread(&ms, "metaslab_t", "mdb_metaslab_t",
2222 addr, 0) == -1)
2223 return (WALK_ERR);
2224
2225 for (i = 0; i < TXG_SIZE; i++) {
2226 if (mdb_ctf_vread(&rt, "range_tree_t",
2227 "mdb_range_tree_t", ms.ms_allocating[i], 0) == -1)
2228 return (WALK_ERR);
2229 sd->ms_allocating[i] += rt.rt_space;
2230 }
2231
2232 if (mdb_ctf_vread(&rt, "range_tree_t",
2233 "mdb_range_tree_t", ms.ms_checkpointing, 0) == -1)
2234 return (WALK_ERR);
2235 sd->ms_checkpointing += rt.rt_space;
2236
2237 if (mdb_ctf_vread(&rt, "range_tree_t",
2238 "mdb_range_tree_t", ms.ms_freeing, 0) == -1)
2239 return (WALK_ERR);
2240 sd->ms_freeing += rt.rt_space;
2241
2242 if (mdb_ctf_vread(&rt, "range_tree_t",
2243 "mdb_range_tree_t", ms.ms_freed, 0) == -1)
2244 return (WALK_ERR);
2245 sd->ms_freed += rt.rt_space;
2246
2247 if (mdb_ctf_vread(&rt, "range_tree_t",
2248 "mdb_range_tree_t", ms.ms_allocatable, 0) == -1)
2249 return (WALK_ERR);
2250 sd->ms_allocatable += rt.rt_space;
2251
2252 if (mdb_ctf_vread(&rt, "range_tree_t",
2253 "mdb_range_tree_t", ms.ms_unflushed_frees, 0) == -1)
2254 return (WALK_ERR);
2255 sd->ms_unflushed_frees += rt.rt_space;
2256 ufrees = rt.rt_space;
2257
2258 if (mdb_ctf_vread(&rt, "range_tree_t",
2259 "mdb_range_tree_t", ms.ms_unflushed_allocs, 0) == -1)
2260 return (WALK_ERR);
2261 sd->ms_unflushed_allocs += rt.rt_space;
2262 uallocs = rt.rt_space;
2263
2264 if (ms.ms_sm != 0 &&
2265 mdb_ctf_vread(&sm, "space_map_t",
2266 "mdb_space_map_t", ms.ms_sm, 0) == -1)
2267 return (WALK_ERR);
2268
2269 if (sm.sm_phys != 0) {
2270 (void) mdb_ctf_vread(&smp, "space_map_phys_t",
2271 "mdb_space_map_phys_t", sm.sm_phys, 0);
2272 }
2273
2274 sd->ms_deferspace += ms.ms_deferspace;
2275 sd->avail += sm.sm_size - smp.smp_alloc + ufrees - uallocs;
2276
2277 return (WALK_NEXT);
2278 }
2279
2280 /*
2281 * ::spa_space [-b]
2282 *
2283 * Given a spa_t, print out it's on-disk space usage and in-core
2284 * estimates of future usage. If -b is given, print space in bytes.
2285 * Otherwise print in megabytes.
2286 */
2287 /* ARGSUSED */
2288 static int
spa_space(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2289 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2290 {
2291 mdb_spa_t spa;
2292 mdb_dsl_pool_t dp;
2293 mdb_dsl_dir_t dd;
2294 mdb_dmu_buf_impl_t db;
2295 mdb_dsl_dir_phys_t dsp;
2296 space_data_t sd;
2297 int shift = 20;
2298 char *suffix = "M";
2299 int bytes = B_FALSE;
2300
2301 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bytes, NULL) !=
2302 argc)
2303 return (DCMD_USAGE);
2304 if (!(flags & DCMD_ADDRSPEC))
2305 return (DCMD_USAGE);
2306
2307 if (bytes) {
2308 shift = 0;
2309 suffix = "";
2310 }
2311
2312 if (mdb_ctf_vread(&spa, ZFS_STRUCT "spa", "mdb_spa_t",
2313 addr, 0) == -1 ||
2314 mdb_ctf_vread(&dp, ZFS_STRUCT "dsl_pool", "mdb_dsl_pool_t",
2315 spa.spa_dsl_pool, 0) == -1 ||
2316 mdb_ctf_vread(&dd, ZFS_STRUCT "dsl_dir", "mdb_dsl_dir_t",
2317 dp.dp_root_dir, 0) == -1 ||
2318 mdb_ctf_vread(&db, ZFS_STRUCT "dmu_buf_impl", "mdb_dmu_buf_impl_t",
2319 dd.dd_dbuf, 0) == -1 ||
2320 mdb_ctf_vread(&dsp, ZFS_STRUCT "dsl_dir_phys",
2321 "mdb_dsl_dir_phys_t", db.db.db_data, 0) == -1) {
2322 return (DCMD_ERR);
2323 }
2324
2325 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n",
2326 dd.dd_space_towrite[0] >> shift, suffix,
2327 dd.dd_space_towrite[1] >> shift, suffix,
2328 dd.dd_space_towrite[2] >> shift, suffix,
2329 dd.dd_space_towrite[3] >> shift, suffix);
2330
2331 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n",
2332 dsp.dd_used_bytes >> shift, suffix);
2333 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n",
2334 dsp.dd_compressed_bytes >> shift, suffix);
2335 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n",
2336 dsp.dd_uncompressed_bytes >> shift, suffix);
2337
2338 bzero(&sd, sizeof (sd));
2339 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) {
2340 mdb_warn("can't walk metaslabs");
2341 return (DCMD_ERR);
2342 }
2343
2344 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n",
2345 sd.ms_allocating[0] >> shift, suffix,
2346 sd.ms_allocating[1] >> shift, suffix,
2347 sd.ms_allocating[2] >> shift, suffix,
2348 sd.ms_allocating[3] >> shift, suffix);
2349 mdb_printf("ms_checkpointing = %llu%s\n",
2350 sd.ms_checkpointing >> shift, suffix);
2351 mdb_printf("ms_freeing = %llu%s\n",
2352 sd.ms_freeing >> shift, suffix);
2353 mdb_printf("ms_freed = %llu%s\n",
2354 sd.ms_freed >> shift, suffix);
2355 mdb_printf("ms_unflushed_frees = %llu%s\n",
2356 sd.ms_unflushed_frees >> shift, suffix);
2357 mdb_printf("ms_unflushed_allocs = %llu%s\n",
2358 sd.ms_unflushed_allocs >> shift, suffix);
2359 mdb_printf("ms_allocatable = %llu%s\n",
2360 sd.ms_allocatable >> shift, suffix);
2361 mdb_printf("ms_deferspace = %llu%s\n",
2362 sd.ms_deferspace >> shift, suffix);
2363 mdb_printf("current avail = %llu%s\n",
2364 sd.avail >> shift, suffix);
2365
2366 return (DCMD_OK);
2367 }
2368
2369 typedef struct mdb_spa_aux_vdev {
2370 int sav_count;
2371 uintptr_t sav_vdevs;
2372 } mdb_spa_aux_vdev_t;
2373
2374 typedef struct mdb_spa_vdevs {
2375 uintptr_t spa_root_vdev;
2376 mdb_spa_aux_vdev_t spa_l2cache;
2377 mdb_spa_aux_vdev_t spa_spares;
2378 } mdb_spa_vdevs_t;
2379
2380 static int
spa_print_aux(mdb_spa_aux_vdev_t * sav,uint_t flags,mdb_arg_t * v,const char * name)2381 spa_print_aux(mdb_spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v,
2382 const char *name)
2383 {
2384 uintptr_t *aux;
2385 size_t len;
2386 int ret, i;
2387
2388 /*
2389 * Iterate over aux vdevs and print those out as well. This is a
2390 * little annoying because we don't have a root vdev to pass to ::vdev.
2391 * Instead, we print a single line and then call it for each child
2392 * vdev.
2393 */
2394 if (sav->sav_count != 0) {
2395 v[1].a_type = MDB_TYPE_STRING;
2396 v[1].a_un.a_str = "-d";
2397 v[2].a_type = MDB_TYPE_IMMEDIATE;
2398 v[2].a_un.a_val = 2;
2399
2400 len = sav->sav_count * sizeof (uintptr_t);
2401 aux = mdb_alloc(len, UM_SLEEP);
2402 if (mdb_vread(aux, len, sav->sav_vdevs) == -1) {
2403 mdb_free(aux, len);
2404 mdb_warn("failed to read l2cache vdevs at %p",
2405 sav->sav_vdevs);
2406 return (DCMD_ERR);
2407 }
2408
2409 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name);
2410
2411 for (i = 0; i < sav->sav_count; i++) {
2412 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v);
2413 if (ret != DCMD_OK) {
2414 mdb_free(aux, len);
2415 return (ret);
2416 }
2417 }
2418
2419 mdb_free(aux, len);
2420 }
2421
2422 return (0);
2423 }
2424
2425 /*
2426 * ::spa_vdevs
2427 *
2428 * -e Include error stats
2429 * -m Include metaslab information
2430 * -M Include metaslab group information
2431 * -h Include histogram information (requires -m or -M)
2432 *
2433 * Print out a summarized list of vdevs for the given spa_t.
2434 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as
2435 * iterating over the cache devices.
2436 */
2437 /* ARGSUSED */
2438 static int
spa_vdevs(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2439 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2440 {
2441 mdb_arg_t v[3];
2442 int ret;
2443 char opts[100] = "-r";
2444 int spa_flags = 0;
2445
2446 if (mdb_getopts(argc, argv,
2447 'e', MDB_OPT_SETBITS, SPA_FLAG_ERRORS, &spa_flags,
2448 'm', MDB_OPT_SETBITS, SPA_FLAG_METASLABS, &spa_flags,
2449 'M', MDB_OPT_SETBITS, SPA_FLAG_METASLAB_GROUPS, &spa_flags,
2450 'h', MDB_OPT_SETBITS, SPA_FLAG_HISTOGRAMS, &spa_flags,
2451 NULL) != argc)
2452 return (DCMD_USAGE);
2453
2454 if (!(flags & DCMD_ADDRSPEC))
2455 return (DCMD_USAGE);
2456
2457 mdb_spa_vdevs_t spa;
2458 if (mdb_ctf_vread(&spa, "spa_t", "mdb_spa_vdevs_t", addr, 0) == -1)
2459 return (DCMD_ERR);
2460
2461 /*
2462 * Unitialized spa_t structures can have a NULL root vdev.
2463 */
2464 if (spa.spa_root_vdev == 0) {
2465 mdb_printf("no associated vdevs\n");
2466 return (DCMD_OK);
2467 }
2468
2469 if (spa_flags & SPA_FLAG_ERRORS)
2470 strcat(opts, "e");
2471 if (spa_flags & SPA_FLAG_METASLABS)
2472 strcat(opts, "m");
2473 if (spa_flags & SPA_FLAG_METASLAB_GROUPS)
2474 strcat(opts, "M");
2475 if (spa_flags & SPA_FLAG_HISTOGRAMS)
2476 strcat(opts, "h");
2477
2478 v[0].a_type = MDB_TYPE_STRING;
2479 v[0].a_un.a_str = opts;
2480
2481 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev,
2482 flags, 1, v);
2483 if (ret != DCMD_OK)
2484 return (ret);
2485
2486 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 ||
2487 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0)
2488 return (DCMD_ERR);
2489
2490 return (DCMD_OK);
2491 }
2492
2493 /*
2494 * ::zio
2495 *
2496 * Print a summary of zio_t and all its children. This is intended to display a
2497 * zio tree, and hence we only pick the most important pieces of information for
2498 * the main summary. More detailed information can always be found by doing a
2499 * '::print zio' on the underlying zio_t. The columns we display are:
2500 *
2501 * ADDRESS TYPE STAGE WAITER TIME_ELAPSED
2502 *
2503 * The 'address' column is indented by one space for each depth level as we
2504 * descend down the tree.
2505 */
2506
2507 #define ZIO_MAXINDENT 7
2508 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT)
2509 #define ZIO_WALK_SELF 0
2510 #define ZIO_WALK_CHILD 1
2511 #define ZIO_WALK_PARENT 2
2512
2513 typedef struct zio_print_args {
2514 int zpa_current_depth;
2515 int zpa_min_depth;
2516 int zpa_max_depth;
2517 int zpa_type;
2518 uint_t zpa_flags;
2519 } zio_print_args_t;
2520
2521 typedef struct mdb_zio {
2522 enum zio_type io_type;
2523 enum zio_stage io_stage;
2524 uintptr_t io_waiter;
2525 uintptr_t io_spa;
2526 struct {
2527 struct {
2528 uintptr_t list_next;
2529 } list_head;
2530 } io_parent_list;
2531 int io_error;
2532 } mdb_zio_t;
2533
2534 typedef struct mdb_zio_timestamp {
2535 hrtime_t io_timestamp;
2536 } mdb_zio_timestamp_t;
2537
2538 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg);
2539
2540 static int
zio_print_cb(uintptr_t addr,zio_print_args_t * zpa)2541 zio_print_cb(uintptr_t addr, zio_print_args_t *zpa)
2542 {
2543 mdb_ctf_id_t type_enum, stage_enum;
2544 int indent = zpa->zpa_current_depth;
2545 const char *type, *stage;
2546 uintptr_t laddr;
2547 mdb_zio_t zio;
2548 mdb_zio_timestamp_t zio_timestamp = { 0 };
2549
2550 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t", addr, 0) == -1)
2551 return (WALK_ERR);
2552 (void) mdb_ctf_vread(&zio_timestamp, ZFS_STRUCT "zio",
2553 "mdb_zio_timestamp_t", addr, MDB_CTF_VREAD_QUIET);
2554
2555 if (indent > ZIO_MAXINDENT)
2556 indent = ZIO_MAXINDENT;
2557
2558 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 ||
2559 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) {
2560 mdb_warn("failed to lookup zio enums");
2561 return (WALK_ERR);
2562 }
2563
2564 if ((type = mdb_ctf_enum_name(type_enum, zio.io_type)) != NULL)
2565 type += sizeof ("ZIO_TYPE_") - 1;
2566 else
2567 type = "?";
2568
2569 if (zio.io_error == 0) {
2570 stage = mdb_ctf_enum_name(stage_enum, zio.io_stage);
2571 if (stage != NULL)
2572 stage += sizeof ("ZIO_STAGE_") - 1;
2573 else
2574 stage = "?";
2575 } else {
2576 stage = "FAILED";
2577 }
2578
2579 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) {
2580 if (zpa->zpa_flags & DCMD_PIPE_OUT) {
2581 mdb_printf("%?p\n", addr);
2582 } else {
2583 mdb_printf("%*s%-*p %-5s %-16s ", indent, "",
2584 ZIO_MAXWIDTH - indent, addr, type, stage);
2585 if (zio.io_waiter != 0)
2586 mdb_printf("%-16lx ", zio.io_waiter);
2587 else
2588 mdb_printf("%-16s ", "-");
2589 #ifdef _KERNEL
2590 if (zio_timestamp.io_timestamp != 0) {
2591 mdb_printf("%llums", (mdb_gethrtime() -
2592 zio_timestamp.io_timestamp) /
2593 1000000);
2594 } else {
2595 mdb_printf("%-12s ", "-");
2596 }
2597 #else
2598 mdb_printf("%-12s ", "-");
2599 #endif
2600 mdb_printf("\n");
2601 }
2602 }
2603
2604 if (zpa->zpa_current_depth >= zpa->zpa_max_depth)
2605 return (WALK_NEXT);
2606
2607 if (zpa->zpa_type == ZIO_WALK_PARENT)
2608 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2609 "io_parent_list");
2610 else
2611 laddr = addr + mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio",
2612 "io_child_list");
2613
2614 zpa->zpa_current_depth++;
2615 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) {
2616 mdb_warn("failed to walk zio_t children at %p\n", laddr);
2617 return (WALK_ERR);
2618 }
2619 zpa->zpa_current_depth--;
2620
2621 return (WALK_NEXT);
2622 }
2623
2624 /* ARGSUSED */
2625 static int
zio_child_cb(uintptr_t addr,const void * unknown,void * arg)2626 zio_child_cb(uintptr_t addr, const void *unknown, void *arg)
2627 {
2628 zio_link_t zl;
2629 uintptr_t ziop;
2630 zio_print_args_t *zpa = arg;
2631
2632 if (mdb_vread(&zl, sizeof (zl), addr) == -1) {
2633 mdb_warn("failed to read zio_link_t at %p", addr);
2634 return (WALK_ERR);
2635 }
2636
2637 if (zpa->zpa_type == ZIO_WALK_PARENT)
2638 ziop = (uintptr_t)zl.zl_parent;
2639 else
2640 ziop = (uintptr_t)zl.zl_child;
2641
2642 return (zio_print_cb(ziop, zpa));
2643 }
2644
2645 /* ARGSUSED */
2646 static int
zio_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2647 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2648 {
2649 zio_print_args_t zpa = { 0 };
2650
2651 if (!(flags & DCMD_ADDRSPEC))
2652 return (DCMD_USAGE);
2653
2654 if (mdb_getopts(argc, argv,
2655 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth,
2656 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type,
2657 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type,
2658 NULL) != argc)
2659 return (DCMD_USAGE);
2660
2661 zpa.zpa_flags = flags;
2662 if (zpa.zpa_max_depth != 0) {
2663 if (zpa.zpa_type == ZIO_WALK_SELF)
2664 zpa.zpa_type = ZIO_WALK_CHILD;
2665 } else if (zpa.zpa_type != ZIO_WALK_SELF) {
2666 zpa.zpa_min_depth = 1;
2667 zpa.zpa_max_depth = 1;
2668 }
2669
2670 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags)) {
2671 mdb_printf("%<u>%-*s %-5s %-16s %-16s %-12s%</u>\n",
2672 ZIO_MAXWIDTH, "ADDRESS", "TYPE", "STAGE", "WAITER",
2673 "TIME_ELAPSED");
2674 }
2675
2676 if (zio_print_cb(addr, &zpa) != WALK_NEXT)
2677 return (DCMD_ERR);
2678
2679 return (DCMD_OK);
2680 }
2681
2682 /*
2683 * [addr]::zio_state
2684 *
2685 * Print a summary of all zio_t structures on the system, or for a particular
2686 * pool. This is equivalent to '::walk zio_root | ::zio'.
2687 */
2688 /*ARGSUSED*/
2689 static int
zio_state(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2690 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2691 {
2692 /*
2693 * MDB will remember the last address of the pipeline, so if we don't
2694 * zero this we'll end up trying to walk zio structures for a
2695 * non-existent spa_t.
2696 */
2697 if (!(flags & DCMD_ADDRSPEC))
2698 addr = 0;
2699
2700 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr));
2701 }
2702
2703
2704 typedef struct mdb_zfs_btree_hdr {
2705 uintptr_t bth_parent;
2706 boolean_t bth_core;
2707 /*
2708 * For both leaf and core nodes, represents the number of elements in
2709 * the node. For core nodes, they will have bth_count + 1 children.
2710 */
2711 uint32_t bth_count;
2712 } mdb_zfs_btree_hdr_t;
2713
2714 typedef struct mdb_zfs_btree_core {
2715 mdb_zfs_btree_hdr_t btc_hdr;
2716 uintptr_t btc_children[BTREE_CORE_ELEMS + 1];
2717 uint8_t btc_elems[];
2718 } mdb_zfs_btree_core_t;
2719
2720 typedef struct mdb_zfs_btree_leaf {
2721 mdb_zfs_btree_hdr_t btl_hdr;
2722 uint8_t btl_elems[];
2723 } mdb_zfs_btree_leaf_t;
2724
2725 typedef struct mdb_zfs_btree {
2726 uintptr_t bt_root;
2727 size_t bt_elem_size;
2728 } mdb_zfs_btree_t;
2729
2730 typedef struct btree_walk_data {
2731 mdb_zfs_btree_t bwd_btree;
2732 mdb_zfs_btree_hdr_t *bwd_node;
2733 uint64_t bwd_offset; // In units of bt_node_size
2734 } btree_walk_data_t;
2735
2736 static uintptr_t
btree_leftmost_child(uintptr_t addr,mdb_zfs_btree_hdr_t * buf)2737 btree_leftmost_child(uintptr_t addr, mdb_zfs_btree_hdr_t *buf)
2738 {
2739 size_t size = offsetof(zfs_btree_core_t, btc_children) +
2740 sizeof (uintptr_t);
2741 for (;;) {
2742 if (mdb_vread(buf, size, addr) == -1) {
2743 mdb_warn("failed to read at %p\n", addr);
2744 return ((uintptr_t)0ULL);
2745 }
2746 if (!buf->bth_core)
2747 return (addr);
2748 mdb_zfs_btree_core_t *node = (mdb_zfs_btree_core_t *)buf;
2749 addr = node->btc_children[0];
2750 }
2751 }
2752
2753 static int
btree_walk_step(mdb_walk_state_t * wsp)2754 btree_walk_step(mdb_walk_state_t *wsp)
2755 {
2756 btree_walk_data_t *bwd = wsp->walk_data;
2757 size_t elem_size = bwd->bwd_btree.bt_elem_size;
2758 if (wsp->walk_addr == 0ULL)
2759 return (WALK_DONE);
2760
2761 if (!bwd->bwd_node->bth_core) {
2762 /*
2763 * For the first element in a leaf node, read in the full
2764 * leaf, since we only had part of it read in before.
2765 */
2766 if (bwd->bwd_offset == 0) {
2767 if (mdb_vread(bwd->bwd_node, BTREE_LEAF_SIZE,
2768 wsp->walk_addr) == -1) {
2769 mdb_warn("failed to read at %p\n",
2770 wsp->walk_addr);
2771 return (WALK_ERR);
2772 }
2773 }
2774
2775 int status = wsp->walk_callback((uintptr_t)(wsp->walk_addr +
2776 offsetof(mdb_zfs_btree_leaf_t, btl_elems) +
2777 bwd->bwd_offset * elem_size), bwd->bwd_node,
2778 wsp->walk_cbdata);
2779 if (status != WALK_NEXT)
2780 return (status);
2781 bwd->bwd_offset++;
2782
2783 /* Find the next element, if we're at the end of the leaf. */
2784 while (bwd->bwd_offset == bwd->bwd_node->bth_count) {
2785 uintptr_t par = bwd->bwd_node->bth_parent;
2786 uintptr_t cur = wsp->walk_addr;
2787 wsp->walk_addr = par;
2788 if (par == 0ULL)
2789 return (WALK_NEXT);
2790
2791 size_t size = sizeof (zfs_btree_core_t) +
2792 BTREE_CORE_ELEMS * elem_size;
2793 if (mdb_vread(bwd->bwd_node, size, wsp->walk_addr) ==
2794 -1) {
2795 mdb_warn("failed to read at %p\n",
2796 wsp->walk_addr);
2797 return (WALK_ERR);
2798 }
2799 mdb_zfs_btree_core_t *node =
2800 (mdb_zfs_btree_core_t *)bwd->bwd_node;
2801 int i;
2802 for (i = 0; i <= bwd->bwd_node->bth_count; i++) {
2803 if (node->btc_children[i] == cur)
2804 break;
2805 }
2806 if (i > bwd->bwd_node->bth_count) {
2807 mdb_warn("btree parent/child mismatch at "
2808 "%#lx\n", cur);
2809 return (WALK_ERR);
2810 }
2811 bwd->bwd_offset = i;
2812 }
2813 return (WALK_NEXT);
2814 }
2815
2816 if (!bwd->bwd_node->bth_core) {
2817 mdb_warn("Invalid btree node at %#lx\n", wsp->walk_addr);
2818 return (WALK_ERR);
2819 }
2820 mdb_zfs_btree_core_t *node = (mdb_zfs_btree_core_t *)bwd->bwd_node;
2821 int status = wsp->walk_callback((uintptr_t)(wsp->walk_addr +
2822 offsetof(mdb_zfs_btree_core_t, btc_elems) + bwd->bwd_offset *
2823 elem_size), bwd->bwd_node, wsp->walk_cbdata);
2824 if (status != WALK_NEXT)
2825 return (status);
2826
2827 uintptr_t new_child = node->btc_children[bwd->bwd_offset + 1];
2828 wsp->walk_addr = btree_leftmost_child(new_child, bwd->bwd_node);
2829 if (wsp->walk_addr == 0ULL)
2830 return (WALK_ERR);
2831
2832 bwd->bwd_offset = 0;
2833 return (WALK_NEXT);
2834 }
2835
2836 static int
btree_walk_init(mdb_walk_state_t * wsp)2837 btree_walk_init(mdb_walk_state_t *wsp)
2838 {
2839 btree_walk_data_t *bwd;
2840
2841 if (wsp->walk_addr == 0ULL) {
2842 mdb_warn("must supply address of zfs_btree_t\n");
2843 return (WALK_ERR);
2844 }
2845
2846 bwd = mdb_zalloc(sizeof (btree_walk_data_t), UM_SLEEP);
2847 if (mdb_ctf_vread(&bwd->bwd_btree, "zfs_btree_t", "mdb_zfs_btree_t",
2848 wsp->walk_addr, 0) == -1) {
2849 mdb_free(bwd, sizeof (*bwd));
2850 return (WALK_ERR);
2851 }
2852
2853 if (bwd->bwd_btree.bt_elem_size == 0) {
2854 mdb_warn("invalid or uninitialized btree at %#lx\n",
2855 wsp->walk_addr);
2856 mdb_free(bwd, sizeof (*bwd));
2857 return (WALK_ERR);
2858 }
2859
2860 size_t size = MAX(BTREE_LEAF_SIZE, sizeof (zfs_btree_core_t) +
2861 BTREE_CORE_ELEMS * bwd->bwd_btree.bt_elem_size);
2862 bwd->bwd_node = mdb_zalloc(size, UM_SLEEP);
2863
2864 uintptr_t node = (uintptr_t)bwd->bwd_btree.bt_root;
2865 if (node == 0ULL) {
2866 wsp->walk_addr = 0ULL;
2867 wsp->walk_data = bwd;
2868 return (WALK_NEXT);
2869 }
2870 node = btree_leftmost_child(node, bwd->bwd_node);
2871 if (node == 0ULL) {
2872 mdb_free(bwd->bwd_node, size);
2873 mdb_free(bwd, sizeof (*bwd));
2874 return (WALK_ERR);
2875 }
2876 bwd->bwd_offset = 0;
2877
2878 wsp->walk_addr = node;
2879 wsp->walk_data = bwd;
2880 return (WALK_NEXT);
2881 }
2882
2883 static void
btree_walk_fini(mdb_walk_state_t * wsp)2884 btree_walk_fini(mdb_walk_state_t *wsp)
2885 {
2886 btree_walk_data_t *bwd = (btree_walk_data_t *)wsp->walk_data;
2887
2888 if (bwd == NULL)
2889 return;
2890
2891 size_t size = MAX(BTREE_LEAF_SIZE, sizeof (zfs_btree_core_t) +
2892 BTREE_CORE_ELEMS * bwd->bwd_btree.bt_elem_size);
2893 if (bwd->bwd_node != NULL)
2894 mdb_free(bwd->bwd_node, size);
2895
2896 mdb_free(bwd, sizeof (*bwd));
2897 }
2898
2899 typedef struct mdb_multilist {
2900 uint64_t ml_num_sublists;
2901 uintptr_t ml_sublists;
2902 } mdb_multilist_t;
2903
2904 static int
multilist_walk_step(mdb_walk_state_t * wsp)2905 multilist_walk_step(mdb_walk_state_t *wsp)
2906 {
2907 return (wsp->walk_callback(wsp->walk_addr, wsp->walk_layer,
2908 wsp->walk_cbdata));
2909 }
2910
2911 static int
multilist_walk_init(mdb_walk_state_t * wsp)2912 multilist_walk_init(mdb_walk_state_t *wsp)
2913 {
2914 mdb_multilist_t ml;
2915 ssize_t sublist_sz;
2916 int list_offset;
2917 size_t i;
2918
2919 if (wsp->walk_addr == 0) {
2920 mdb_warn("must supply address of multilist_t\n");
2921 return (WALK_ERR);
2922 }
2923
2924 if (mdb_ctf_vread(&ml, "multilist_t", "mdb_multilist_t",
2925 wsp->walk_addr, 0) == -1) {
2926 return (WALK_ERR);
2927 }
2928
2929 if (ml.ml_num_sublists == 0 || ml.ml_sublists == 0) {
2930 mdb_warn("invalid or uninitialized multilist at %#lx\n",
2931 wsp->walk_addr);
2932 return (WALK_ERR);
2933 }
2934
2935 /* mdb_ctf_sizeof_by_name() will print an error for us */
2936 sublist_sz = mdb_ctf_sizeof_by_name("multilist_sublist_t");
2937 if (sublist_sz == -1)
2938 return (WALK_ERR);
2939
2940 /* mdb_ctf_offsetof_by_name will print an error for us */
2941 list_offset = mdb_ctf_offsetof_by_name("multilist_sublist_t",
2942 "mls_list");
2943 if (list_offset == -1)
2944 return (WALK_ERR);
2945
2946 for (i = 0; i < ml.ml_num_sublists; i++) {
2947 wsp->walk_addr = ml.ml_sublists + i * sublist_sz + list_offset;
2948
2949 if (mdb_layered_walk("list", wsp) == -1) {
2950 mdb_warn("can't walk multilist sublist");
2951 return (WALK_ERR);
2952 }
2953 }
2954
2955 return (WALK_NEXT);
2956 }
2957
2958 typedef struct mdb_txg_list {
2959 size_t tl_offset;
2960 uintptr_t tl_head[TXG_SIZE];
2961 } mdb_txg_list_t;
2962
2963 typedef struct txg_list_walk_data {
2964 uintptr_t lw_head[TXG_SIZE];
2965 int lw_txgoff;
2966 int lw_maxoff;
2967 size_t lw_offset;
2968 void *lw_obj;
2969 } txg_list_walk_data_t;
2970
2971 static int
txg_list_walk_init_common(mdb_walk_state_t * wsp,int txg,int maxoff)2972 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff)
2973 {
2974 txg_list_walk_data_t *lwd;
2975 mdb_txg_list_t list;
2976 int i;
2977
2978 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC);
2979 if (mdb_ctf_vread(&list, "txg_list_t", "mdb_txg_list_t", wsp->walk_addr,
2980 0) == -1) {
2981 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr);
2982 return (WALK_ERR);
2983 }
2984
2985 for (i = 0; i < TXG_SIZE; i++)
2986 lwd->lw_head[i] = list.tl_head[i];
2987 lwd->lw_offset = list.tl_offset;
2988 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t),
2989 UM_SLEEP | UM_GC);
2990 lwd->lw_txgoff = txg;
2991 lwd->lw_maxoff = maxoff;
2992
2993 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
2994 wsp->walk_data = lwd;
2995
2996 return (WALK_NEXT);
2997 }
2998
2999 static int
txg_list_walk_init(mdb_walk_state_t * wsp)3000 txg_list_walk_init(mdb_walk_state_t *wsp)
3001 {
3002 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1));
3003 }
3004
3005 static int
txg_list0_walk_init(mdb_walk_state_t * wsp)3006 txg_list0_walk_init(mdb_walk_state_t *wsp)
3007 {
3008 return (txg_list_walk_init_common(wsp, 0, 0));
3009 }
3010
3011 static int
txg_list1_walk_init(mdb_walk_state_t * wsp)3012 txg_list1_walk_init(mdb_walk_state_t *wsp)
3013 {
3014 return (txg_list_walk_init_common(wsp, 1, 1));
3015 }
3016
3017 static int
txg_list2_walk_init(mdb_walk_state_t * wsp)3018 txg_list2_walk_init(mdb_walk_state_t *wsp)
3019 {
3020 return (txg_list_walk_init_common(wsp, 2, 2));
3021 }
3022
3023 static int
txg_list3_walk_init(mdb_walk_state_t * wsp)3024 txg_list3_walk_init(mdb_walk_state_t *wsp)
3025 {
3026 return (txg_list_walk_init_common(wsp, 3, 3));
3027 }
3028
3029 static int
txg_list_walk_step(mdb_walk_state_t * wsp)3030 txg_list_walk_step(mdb_walk_state_t *wsp)
3031 {
3032 txg_list_walk_data_t *lwd = wsp->walk_data;
3033 uintptr_t addr;
3034 txg_node_t *node;
3035 int status;
3036
3037 while (wsp->walk_addr == 0 && lwd->lw_txgoff < lwd->lw_maxoff) {
3038 lwd->lw_txgoff++;
3039 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
3040 }
3041
3042 if (wsp->walk_addr == 0)
3043 return (WALK_DONE);
3044
3045 addr = wsp->walk_addr - lwd->lw_offset;
3046
3047 if (mdb_vread(lwd->lw_obj,
3048 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) {
3049 mdb_warn("failed to read list element at %#lx", addr);
3050 return (WALK_ERR);
3051 }
3052
3053 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata);
3054 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset);
3055 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff];
3056
3057 return (status);
3058 }
3059
3060 /*
3061 * ::walk spa
3062 *
3063 * Walk all named spa_t structures in the namespace. This is nothing more than
3064 * a layered avl walk.
3065 */
3066 static int
spa_walk_init(mdb_walk_state_t * wsp)3067 spa_walk_init(mdb_walk_state_t *wsp)
3068 {
3069 GElf_Sym sym;
3070
3071 if (wsp->walk_addr != 0) {
3072 mdb_warn("spa walk only supports global walks\n");
3073 return (WALK_ERR);
3074 }
3075
3076 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) {
3077 mdb_warn("failed to find symbol 'spa_namespace_avl'");
3078 return (WALK_ERR);
3079 }
3080
3081 wsp->walk_addr = (uintptr_t)sym.st_value;
3082
3083 if (mdb_layered_walk("avl", wsp) == -1) {
3084 mdb_warn("failed to walk 'avl'\n");
3085 return (WALK_ERR);
3086 }
3087
3088 return (WALK_NEXT);
3089 }
3090
3091 static int
spa_walk_step(mdb_walk_state_t * wsp)3092 spa_walk_step(mdb_walk_state_t *wsp)
3093 {
3094 return (wsp->walk_callback(wsp->walk_addr, NULL, wsp->walk_cbdata));
3095 }
3096
3097 /*
3098 * [addr]::walk zio
3099 *
3100 * Walk all active zio_t structures on the system. This is simply a layered
3101 * walk on top of ::walk zio_cache, with the optional ability to limit the
3102 * structures to a particular pool.
3103 */
3104 static int
zio_walk_init(mdb_walk_state_t * wsp)3105 zio_walk_init(mdb_walk_state_t *wsp)
3106 {
3107 wsp->walk_data = (void *)wsp->walk_addr;
3108
3109 if (mdb_layered_walk("zio_cache", wsp) == -1) {
3110 mdb_warn("failed to walk 'zio_cache'\n");
3111 return (WALK_ERR);
3112 }
3113
3114 return (WALK_NEXT);
3115 }
3116
3117 static int
zio_walk_step(mdb_walk_state_t * wsp)3118 zio_walk_step(mdb_walk_state_t *wsp)
3119 {
3120 mdb_zio_t zio;
3121 uintptr_t spa = (uintptr_t)wsp->walk_data;
3122
3123 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
3124 wsp->walk_addr, 0) == -1)
3125 return (WALK_ERR);
3126
3127 if (spa != 0 && spa != zio.io_spa)
3128 return (WALK_NEXT);
3129
3130 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
3131 }
3132
3133 /*
3134 * [addr]::walk zio_root
3135 *
3136 * Walk only root zio_t structures, optionally for a particular spa_t.
3137 */
3138 static int
zio_walk_root_step(mdb_walk_state_t * wsp)3139 zio_walk_root_step(mdb_walk_state_t *wsp)
3140 {
3141 mdb_zio_t zio;
3142 uintptr_t spa = (uintptr_t)wsp->walk_data;
3143
3144 if (mdb_ctf_vread(&zio, ZFS_STRUCT "zio", "mdb_zio_t",
3145 wsp->walk_addr, 0) == -1)
3146 return (WALK_ERR);
3147
3148 if (spa != 0 && spa != zio.io_spa)
3149 return (WALK_NEXT);
3150
3151 /* If the parent list is not empty, ignore */
3152 if (zio.io_parent_list.list_head.list_next !=
3153 wsp->walk_addr +
3154 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zio", "io_parent_list") +
3155 mdb_ctf_offsetof_by_name("struct list", "list_head"))
3156 return (WALK_NEXT);
3157
3158 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
3159 }
3160
3161 /*
3162 * ::zfs_blkstats
3163 *
3164 * -v print verbose per-level information
3165 *
3166 */
3167 static int
zfs_blkstats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3168 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3169 {
3170 boolean_t verbose = B_FALSE;
3171 zfs_all_blkstats_t stats;
3172 dmu_object_type_t t;
3173 zfs_blkstat_t *tzb;
3174 uint64_t ditto;
3175
3176 if (mdb_getopts(argc, argv,
3177 'v', MDB_OPT_SETBITS, TRUE, &verbose,
3178 NULL) != argc)
3179 return (DCMD_USAGE);
3180
3181 if (!(flags & DCMD_ADDRSPEC))
3182 return (DCMD_USAGE);
3183
3184 if (GETMEMB(addr, "spa", spa_dsl_pool, addr) ||
3185 GETMEMB(addr, "dsl_pool", dp_blkstats, addr) ||
3186 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) {
3187 mdb_warn("failed to read data at %p;", addr);
3188 mdb_printf("maybe no stats? run \"zpool scrub\" first.");
3189 return (DCMD_ERR);
3190 }
3191
3192 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_TOTAL];
3193 if (tzb->zb_gangs != 0) {
3194 mdb_printf("Ganged blocks: %llu\n",
3195 (longlong_t)tzb->zb_gangs);
3196 }
3197
3198 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev +
3199 tzb->zb_ditto_3_of_3_samevdev;
3200 if (ditto != 0) {
3201 mdb_printf("Dittoed blocks on same vdev: %llu\n",
3202 (longlong_t)ditto);
3203 }
3204
3205 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
3206 "\t avg\t comp\t%%Total\tType\n");
3207
3208 for (t = 0; t <= DMU_OT_TOTAL; t++) {
3209 char csize[MDB_NICENUM_BUFLEN], lsize[MDB_NICENUM_BUFLEN];
3210 char psize[MDB_NICENUM_BUFLEN], asize[MDB_NICENUM_BUFLEN];
3211 char avg[MDB_NICENUM_BUFLEN];
3212 char comp[MDB_NICENUM_BUFLEN], pct[MDB_NICENUM_BUFLEN];
3213 char typename[64];
3214 int l;
3215
3216
3217 if (t == DMU_OT_DEFERRED)
3218 strcpy(typename, "deferred free");
3219 else if (t == DMU_OT_OTHER)
3220 strcpy(typename, "other");
3221 else if (t == DMU_OT_TOTAL)
3222 strcpy(typename, "Total");
3223 else if (enum_lookup("enum dmu_object_type",
3224 t, "DMU_OT_", sizeof (typename), typename) == -1) {
3225 mdb_warn("failed to read type name");
3226 return (DCMD_ERR);
3227 }
3228
3229 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0)
3230 continue;
3231
3232 for (l = -1; l < DN_MAX_LEVELS; l++) {
3233 int level = (l == -1 ? DN_MAX_LEVELS : l);
3234 zfs_blkstat_t *zb = &stats.zab_type[level][t];
3235
3236 if (zb->zb_asize == 0)
3237 continue;
3238
3239 /*
3240 * Don't print each level unless requested.
3241 */
3242 if (!verbose && level != DN_MAX_LEVELS)
3243 continue;
3244
3245 /*
3246 * If all the space is level 0, don't print the
3247 * level 0 separately.
3248 */
3249 if (level == 0 && zb->zb_asize ==
3250 stats.zab_type[DN_MAX_LEVELS][t].zb_asize)
3251 continue;
3252
3253 mdb_nicenum(zb->zb_count, csize);
3254 mdb_nicenum(zb->zb_lsize, lsize);
3255 mdb_nicenum(zb->zb_psize, psize);
3256 mdb_nicenum(zb->zb_asize, asize);
3257 mdb_nicenum(zb->zb_asize / zb->zb_count, avg);
3258 (void) mdb_snprintfrac(comp, MDB_NICENUM_BUFLEN,
3259 zb->zb_lsize, zb->zb_psize, 2);
3260 (void) mdb_snprintfrac(pct, MDB_NICENUM_BUFLEN,
3261 100 * zb->zb_asize, tzb->zb_asize, 2);
3262
3263 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s"
3264 "\t%5s\t%6s\t",
3265 csize, lsize, psize, asize, avg, comp, pct);
3266
3267 if (level == DN_MAX_LEVELS)
3268 mdb_printf("%s\n", typename);
3269 else
3270 mdb_printf(" L%d %s\n",
3271 level, typename);
3272 }
3273 }
3274
3275 return (DCMD_OK);
3276 }
3277
3278 typedef struct mdb_reference {
3279 uintptr_t ref_holder;
3280 uintptr_t ref_removed;
3281 uint64_t ref_number;
3282 } mdb_reference_t;
3283
3284 /* ARGSUSED */
3285 static int
reference_cb(uintptr_t addr,const void * ignored,void * arg)3286 reference_cb(uintptr_t addr, const void *ignored, void *arg)
3287 {
3288 mdb_reference_t ref;
3289 boolean_t holder_is_str = B_FALSE;
3290 char holder_str[128];
3291 boolean_t removed = (boolean_t)arg;
3292
3293 if (mdb_ctf_vread(&ref, "reference_t", "mdb_reference_t", addr,
3294 0) == -1)
3295 return (DCMD_ERR);
3296
3297 if (mdb_readstr(holder_str, sizeof (holder_str),
3298 ref.ref_holder) != -1)
3299 holder_is_str = strisprint(holder_str);
3300
3301 if (removed)
3302 mdb_printf("removed ");
3303 mdb_printf("reference ");
3304 if (ref.ref_number != 1)
3305 mdb_printf("with count=%llu ", ref.ref_number);
3306 mdb_printf("with tag %lx", ref.ref_holder);
3307 if (holder_is_str)
3308 mdb_printf(" \"%s\"", holder_str);
3309 mdb_printf(", held at:\n");
3310
3311 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
3312
3313 if (removed) {
3314 mdb_printf("removed at:\n");
3315 (void) mdb_call_dcmd("whatis", ref.ref_removed,
3316 DCMD_ADDRSPEC, 0, NULL);
3317 }
3318
3319 mdb_printf("\n");
3320
3321 return (WALK_NEXT);
3322 }
3323
3324 typedef struct mdb_zfs_refcount {
3325 uint64_t rc_count;
3326 } mdb_zfs_refcount_t;
3327
3328 typedef struct mdb_zfs_refcount_removed {
3329 uint_t rc_removed_count;
3330 } mdb_zfs_refcount_removed_t;
3331
3332 typedef struct mdb_zfs_refcount_tracked {
3333 boolean_t rc_tracked;
3334 } mdb_zfs_refcount_tracked_t;
3335
3336 /* ARGSUSED */
3337 static int
zfs_refcount(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3338 zfs_refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3339 {
3340 mdb_zfs_refcount_t rc;
3341 mdb_zfs_refcount_removed_t rcr;
3342 mdb_zfs_refcount_tracked_t rct;
3343 int off;
3344 boolean_t released = B_FALSE;
3345
3346 if (!(flags & DCMD_ADDRSPEC))
3347 return (DCMD_USAGE);
3348
3349 if (mdb_getopts(argc, argv,
3350 'r', MDB_OPT_SETBITS, B_TRUE, &released,
3351 NULL) != argc)
3352 return (DCMD_USAGE);
3353
3354 if (mdb_ctf_vread(&rc, "zfs_refcount_t", "mdb_zfs_refcount_t", addr,
3355 0) == -1)
3356 return (DCMD_ERR);
3357
3358 if (mdb_ctf_vread(&rcr, "zfs_refcount_t", "mdb_zfs_refcount_removed_t",
3359 addr, MDB_CTF_VREAD_QUIET) == -1) {
3360 mdb_printf("zfs_refcount_t at %p has %llu holds (untracked)\n",
3361 addr, (longlong_t)rc.rc_count);
3362 return (DCMD_OK);
3363 }
3364
3365 if (mdb_ctf_vread(&rct, "zfs_refcount_t", "mdb_zfs_refcount_tracked_t",
3366 addr, MDB_CTF_VREAD_QUIET) == -1) {
3367 /* If this is an old target, it might be tracked. */
3368 rct.rc_tracked = B_TRUE;
3369 }
3370
3371 mdb_printf("zfs_refcount_t at %p has %llu current holds, "
3372 "%llu recently released holds\n",
3373 addr, (longlong_t)rc.rc_count, (longlong_t)rcr.rc_removed_count);
3374
3375 if (rct.rc_tracked && rc.rc_count > 0)
3376 mdb_printf("current holds:\n");
3377 off = mdb_ctf_offsetof_by_name("zfs_refcount_t", "rc_tree");
3378 if (off == -1)
3379 return (DCMD_ERR);
3380 mdb_pwalk("avl", reference_cb, (void *)B_FALSE, addr + off);
3381
3382 if (released && rcr.rc_removed_count > 0) {
3383 mdb_printf("released holds:\n");
3384
3385 off = mdb_ctf_offsetof_by_name("zfs_refcount_t", "rc_removed");
3386 if (off == -1)
3387 return (DCMD_ERR);
3388 mdb_pwalk("list", reference_cb, (void *)B_TRUE, addr + off);
3389 }
3390
3391 return (DCMD_OK);
3392 }
3393
3394 /* ARGSUSED */
3395 static int
sa_attr_table(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3396 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3397 {
3398 sa_attr_table_t *table;
3399 sa_os_t sa_os;
3400 char *name;
3401 int i;
3402
3403 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) {
3404 mdb_warn("failed to read sa_os at %p", addr);
3405 return (DCMD_ERR);
3406 }
3407
3408 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
3409 UM_SLEEP | UM_GC);
3410 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC);
3411
3412 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
3413 (uintptr_t)sa_os.sa_attr_table) == -1) {
3414 mdb_warn("failed to read sa_os at %p", addr);
3415 return (DCMD_ERR);
3416 }
3417
3418 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n",
3419 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME");
3420 for (i = 0; i != sa_os.sa_num_attrs; i++) {
3421 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name);
3422 mdb_printf("%5x %8x %8x %8x %-s\n",
3423 (int)table[i].sa_attr, (int)table[i].sa_registered,
3424 (int)table[i].sa_length, table[i].sa_byteswap, name);
3425 }
3426
3427 return (DCMD_OK);
3428 }
3429
3430 static int
sa_get_off_table(uintptr_t addr,uint32_t ** off_tab,int attr_count)3431 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count)
3432 {
3433 uintptr_t idx_table;
3434
3435 if (GETMEMB(addr, "sa_idx_tab", sa_idx_tab, idx_table)) {
3436 mdb_printf("can't find offset table in sa_idx_tab\n");
3437 return (-1);
3438 }
3439
3440 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t),
3441 UM_SLEEP | UM_GC);
3442
3443 if (mdb_vread(*off_tab,
3444 attr_count * sizeof (uint32_t), idx_table) == -1) {
3445 mdb_warn("failed to attribute offset table %p", idx_table);
3446 return (-1);
3447 }
3448
3449 return (DCMD_OK);
3450 }
3451
3452 /*ARGSUSED*/
3453 static int
sa_attr_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3454 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3455 {
3456 uint32_t *offset_tab;
3457 int attr_count;
3458 uint64_t attr_id;
3459 uintptr_t attr_addr;
3460 uintptr_t bonus_tab, spill_tab;
3461 uintptr_t db_bonus, db_spill;
3462 uintptr_t os, os_sa;
3463 uintptr_t db_data;
3464
3465 if (argc != 1)
3466 return (DCMD_USAGE);
3467
3468 if (argv[0].a_type == MDB_TYPE_STRING)
3469 attr_id = mdb_strtoull(argv[0].a_un.a_str);
3470 else
3471 return (DCMD_USAGE);
3472
3473 if (GETMEMB(addr, "sa_handle", sa_bonus_tab, bonus_tab) ||
3474 GETMEMB(addr, "sa_handle", sa_spill_tab, spill_tab) ||
3475 GETMEMB(addr, "sa_handle", sa_os, os) ||
3476 GETMEMB(addr, "sa_handle", sa_bonus, db_bonus) ||
3477 GETMEMB(addr, "sa_handle", sa_spill, db_spill)) {
3478 mdb_printf("Can't find necessary information in sa_handle "
3479 "in sa_handle\n");
3480 return (DCMD_ERR);
3481 }
3482
3483 if (GETMEMB(os, "objset", os_sa, os_sa)) {
3484 mdb_printf("Can't find os_sa in objset\n");
3485 return (DCMD_ERR);
3486 }
3487
3488 if (GETMEMB(os_sa, "sa_os", sa_num_attrs, attr_count)) {
3489 mdb_printf("Can't find sa_num_attrs\n");
3490 return (DCMD_ERR);
3491 }
3492
3493 if (attr_id > attr_count) {
3494 mdb_printf("attribute id number is out of range\n");
3495 return (DCMD_ERR);
3496 }
3497
3498 if (bonus_tab) {
3499 if (sa_get_off_table(bonus_tab, &offset_tab,
3500 attr_count) == -1) {
3501 return (DCMD_ERR);
3502 }
3503
3504 if (GETMEMB(db_bonus, "dmu_buf", db_data, db_data)) {
3505 mdb_printf("can't find db_data in bonus dbuf\n");
3506 return (DCMD_ERR);
3507 }
3508 }
3509
3510 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) &&
3511 spill_tab == 0) {
3512 mdb_printf("Attribute does not exist\n");
3513 return (DCMD_ERR);
3514 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) {
3515 if (sa_get_off_table(spill_tab, &offset_tab,
3516 attr_count) == -1) {
3517 return (DCMD_ERR);
3518 }
3519 if (GETMEMB(db_spill, "dmu_buf", db_data, db_data)) {
3520 mdb_printf("can't find db_data in spill dbuf\n");
3521 return (DCMD_ERR);
3522 }
3523 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) {
3524 mdb_printf("Attribute does not exist\n");
3525 return (DCMD_ERR);
3526 }
3527 }
3528 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]);
3529 mdb_printf("%p\n", attr_addr);
3530 return (DCMD_OK);
3531 }
3532
3533 /* ARGSUSED */
3534 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)3535 zfs_ace_print_common(uintptr_t addr, uint_t flags,
3536 uint64_t id, uint32_t access_mask, uint16_t ace_flags,
3537 uint16_t ace_type, int verbose)
3538 {
3539 if (DCMD_HDRSPEC(flags) && !verbose)
3540 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n",
3541 "ADDR", "FLAGS", "MASK", "TYPE", "ID");
3542
3543 if (!verbose) {
3544 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr,
3545 ace_flags, access_mask, ace_type, id);
3546 return (DCMD_OK);
3547 }
3548
3549 switch (ace_flags & ACE_TYPE_FLAGS) {
3550 case ACE_OWNER:
3551 mdb_printf("owner@:");
3552 break;
3553 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
3554 mdb_printf("group@:");
3555 break;
3556 case ACE_EVERYONE:
3557 mdb_printf("everyone@:");
3558 break;
3559 case ACE_IDENTIFIER_GROUP:
3560 mdb_printf("group:%llx:", (u_longlong_t)id);
3561 break;
3562 case 0: /* User entry */
3563 mdb_printf("user:%llx:", (u_longlong_t)id);
3564 break;
3565 }
3566
3567 /* print out permission mask */
3568 if (access_mask & ACE_READ_DATA)
3569 mdb_printf("r");
3570 else
3571 mdb_printf("-");
3572 if (access_mask & ACE_WRITE_DATA)
3573 mdb_printf("w");
3574 else
3575 mdb_printf("-");
3576 if (access_mask & ACE_EXECUTE)
3577 mdb_printf("x");
3578 else
3579 mdb_printf("-");
3580 if (access_mask & ACE_APPEND_DATA)
3581 mdb_printf("p");
3582 else
3583 mdb_printf("-");
3584 if (access_mask & ACE_DELETE)
3585 mdb_printf("d");
3586 else
3587 mdb_printf("-");
3588 if (access_mask & ACE_DELETE_CHILD)
3589 mdb_printf("D");
3590 else
3591 mdb_printf("-");
3592 if (access_mask & ACE_READ_ATTRIBUTES)
3593 mdb_printf("a");
3594 else
3595 mdb_printf("-");
3596 if (access_mask & ACE_WRITE_ATTRIBUTES)
3597 mdb_printf("A");
3598 else
3599 mdb_printf("-");
3600 if (access_mask & ACE_READ_NAMED_ATTRS)
3601 mdb_printf("R");
3602 else
3603 mdb_printf("-");
3604 if (access_mask & ACE_WRITE_NAMED_ATTRS)
3605 mdb_printf("W");
3606 else
3607 mdb_printf("-");
3608 if (access_mask & ACE_READ_ACL)
3609 mdb_printf("c");
3610 else
3611 mdb_printf("-");
3612 if (access_mask & ACE_WRITE_ACL)
3613 mdb_printf("C");
3614 else
3615 mdb_printf("-");
3616 if (access_mask & ACE_WRITE_OWNER)
3617 mdb_printf("o");
3618 else
3619 mdb_printf("-");
3620 if (access_mask & ACE_SYNCHRONIZE)
3621 mdb_printf("s");
3622 else
3623 mdb_printf("-");
3624
3625 mdb_printf(":");
3626
3627 /* Print out inheritance flags */
3628 if (ace_flags & ACE_FILE_INHERIT_ACE)
3629 mdb_printf("f");
3630 else
3631 mdb_printf("-");
3632 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE)
3633 mdb_printf("d");
3634 else
3635 mdb_printf("-");
3636 if (ace_flags & ACE_INHERIT_ONLY_ACE)
3637 mdb_printf("i");
3638 else
3639 mdb_printf("-");
3640 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE)
3641 mdb_printf("n");
3642 else
3643 mdb_printf("-");
3644 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)
3645 mdb_printf("S");
3646 else
3647 mdb_printf("-");
3648 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG)
3649 mdb_printf("F");
3650 else
3651 mdb_printf("-");
3652 if (ace_flags & ACE_INHERITED_ACE)
3653 mdb_printf("I");
3654 else
3655 mdb_printf("-");
3656
3657 switch (ace_type) {
3658 case ACE_ACCESS_ALLOWED_ACE_TYPE:
3659 mdb_printf(":allow\n");
3660 break;
3661 case ACE_ACCESS_DENIED_ACE_TYPE:
3662 mdb_printf(":deny\n");
3663 break;
3664 case ACE_SYSTEM_AUDIT_ACE_TYPE:
3665 mdb_printf(":audit\n");
3666 break;
3667 case ACE_SYSTEM_ALARM_ACE_TYPE:
3668 mdb_printf(":alarm\n");
3669 break;
3670 default:
3671 mdb_printf(":?\n");
3672 }
3673 return (DCMD_OK);
3674 }
3675
3676 /* ARGSUSED */
3677 static int
zfs_ace_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3678 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3679 {
3680 zfs_ace_t zace;
3681 int verbose = FALSE;
3682 uint64_t id;
3683
3684 if (!(flags & DCMD_ADDRSPEC))
3685 return (DCMD_USAGE);
3686
3687 if (mdb_getopts(argc, argv,
3688 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3689 return (DCMD_USAGE);
3690
3691 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) {
3692 mdb_warn("failed to read zfs_ace_t");
3693 return (DCMD_ERR);
3694 }
3695
3696 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 ||
3697 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
3698 id = zace.z_fuid;
3699 else
3700 id = -1;
3701
3702 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask,
3703 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose));
3704 }
3705
3706 /* ARGSUSED */
3707 static int
zfs_ace0_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3708 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3709 {
3710 ace_t ace;
3711 uint64_t id;
3712 int verbose = FALSE;
3713
3714 if (!(flags & DCMD_ADDRSPEC))
3715 return (DCMD_USAGE);
3716
3717 if (mdb_getopts(argc, argv,
3718 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
3719 return (DCMD_USAGE);
3720
3721 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) {
3722 mdb_warn("failed to read ace_t");
3723 return (DCMD_ERR);
3724 }
3725
3726 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 ||
3727 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
3728 id = ace.a_who;
3729 else
3730 id = -1;
3731
3732 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask,
3733 ace.a_flags, ace.a_type, verbose));
3734 }
3735
3736 typedef struct acl_dump_args {
3737 int a_argc;
3738 const mdb_arg_t *a_argv;
3739 uint16_t a_version;
3740 int a_flags;
3741 } acl_dump_args_t;
3742
3743 /* ARGSUSED */
3744 static int
acl_aces_cb(uintptr_t addr,const void * unknown,void * arg)3745 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg)
3746 {
3747 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
3748
3749 if (acl_args->a_version == 1) {
3750 if (mdb_call_dcmd("zfs_ace", addr,
3751 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
3752 acl_args->a_argv) != DCMD_OK) {
3753 return (WALK_ERR);
3754 }
3755 } else {
3756 if (mdb_call_dcmd("zfs_ace0", addr,
3757 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
3758 acl_args->a_argv) != DCMD_OK) {
3759 return (WALK_ERR);
3760 }
3761 }
3762 acl_args->a_flags = DCMD_LOOP;
3763 return (WALK_NEXT);
3764 }
3765
3766 /* ARGSUSED */
3767 static int
acl_cb(uintptr_t addr,const void * unknown,void * arg)3768 acl_cb(uintptr_t addr, const void *unknown, void *arg)
3769 {
3770 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
3771
3772 if (acl_args->a_version == 1) {
3773 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb,
3774 arg, addr) != 0) {
3775 mdb_warn("can't walk ACEs");
3776 return (DCMD_ERR);
3777 }
3778 } else {
3779 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb,
3780 arg, addr) != 0) {
3781 mdb_warn("can't walk ACEs");
3782 return (DCMD_ERR);
3783 }
3784 }
3785 return (WALK_NEXT);
3786 }
3787
3788 /* ARGSUSED */
3789 static int
zfs_acl_dump(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)3790 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
3791 {
3792 zfs_acl_t zacl;
3793 int verbose = FALSE;
3794 acl_dump_args_t acl_args;
3795
3796 if (!(flags & DCMD_ADDRSPEC))
3797 return (DCMD_USAGE);
3798
3799 if (mdb_getopts(argc, argv,
3800 'v', MDB_OPT_SETBITS, TRUE, &verbose, NULL) != argc)
3801 return (DCMD_USAGE);
3802
3803 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) {
3804 mdb_warn("failed to read zfs_acl_t");
3805 return (DCMD_ERR);
3806 }
3807
3808 acl_args.a_argc = argc;
3809 acl_args.a_argv = argv;
3810 acl_args.a_version = zacl.z_version;
3811 acl_args.a_flags = DCMD_LOOPFIRST;
3812
3813 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) {
3814 mdb_warn("can't walk ACL");
3815 return (DCMD_ERR);
3816 }
3817
3818 return (DCMD_OK);
3819 }
3820
3821 /* ARGSUSED */
3822 static int
zfs_acl_node_walk_init(mdb_walk_state_t * wsp)3823 zfs_acl_node_walk_init(mdb_walk_state_t *wsp)
3824 {
3825 if (wsp->walk_addr == 0) {
3826 mdb_warn("must supply address of zfs_acl_node_t\n");
3827 return (WALK_ERR);
3828 }
3829
3830 wsp->walk_addr +=
3831 mdb_ctf_offsetof_by_name(ZFS_STRUCT "zfs_acl", "z_acl");
3832
3833 if (mdb_layered_walk("list", wsp) == -1) {
3834 mdb_warn("failed to walk 'list'\n");
3835 return (WALK_ERR);
3836 }
3837
3838 return (WALK_NEXT);
3839 }
3840
3841 static int
zfs_acl_node_walk_step(mdb_walk_state_t * wsp)3842 zfs_acl_node_walk_step(mdb_walk_state_t *wsp)
3843 {
3844 zfs_acl_node_t aclnode;
3845
3846 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t),
3847 wsp->walk_addr) == -1) {
3848 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr);
3849 return (WALK_ERR);
3850 }
3851
3852 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata));
3853 }
3854
3855 typedef struct ace_walk_data {
3856 int ace_count;
3857 int ace_version;
3858 } ace_walk_data_t;
3859
3860 static int
zfs_aces_walk_init_common(mdb_walk_state_t * wsp,int version,int ace_count,uintptr_t ace_data)3861 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version,
3862 int ace_count, uintptr_t ace_data)
3863 {
3864 ace_walk_data_t *ace_walk_data;
3865
3866 if (wsp->walk_addr == 0) {
3867 mdb_warn("must supply address of zfs_acl_node_t\n");
3868 return (WALK_ERR);
3869 }
3870
3871 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC);
3872
3873 ace_walk_data->ace_count = ace_count;
3874 ace_walk_data->ace_version = version;
3875
3876 wsp->walk_addr = ace_data;
3877 wsp->walk_data = ace_walk_data;
3878
3879 return (WALK_NEXT);
3880 }
3881
3882 static int
zfs_acl_node_aces_walk_init_common(mdb_walk_state_t * wsp,int version)3883 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version)
3884 {
3885 static int gotid;
3886 static mdb_ctf_id_t acl_id;
3887 int z_ace_count;
3888 uintptr_t z_acldata;
3889
3890 if (!gotid) {
3891 if (mdb_ctf_lookup_by_name("struct zfs_acl_node",
3892 &acl_id) == -1) {
3893 mdb_warn("couldn't find struct zfs_acl_node");
3894 return (DCMD_ERR);
3895 }
3896 gotid = TRUE;
3897 }
3898
3899 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) {
3900 return (DCMD_ERR);
3901 }
3902 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) {
3903 return (DCMD_ERR);
3904 }
3905
3906 return (zfs_aces_walk_init_common(wsp, version,
3907 z_ace_count, z_acldata));
3908 }
3909
3910 /* ARGSUSED */
3911 static int
zfs_acl_node_aces_walk_init(mdb_walk_state_t * wsp)3912 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp)
3913 {
3914 return (zfs_acl_node_aces_walk_init_common(wsp, 1));
3915 }
3916
3917 /* ARGSUSED */
3918 static int
zfs_acl_node_aces0_walk_init(mdb_walk_state_t * wsp)3919 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp)
3920 {
3921 return (zfs_acl_node_aces_walk_init_common(wsp, 0));
3922 }
3923
3924 static int
zfs_aces_walk_step(mdb_walk_state_t * wsp)3925 zfs_aces_walk_step(mdb_walk_state_t *wsp)
3926 {
3927 ace_walk_data_t *ace_data = wsp->walk_data;
3928 zfs_ace_t zace;
3929 ace_t *acep;
3930 int status;
3931 int entry_type;
3932 int allow_type;
3933 uintptr_t ptr;
3934
3935 if (ace_data->ace_count == 0)
3936 return (WALK_DONE);
3937
3938 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) {
3939 mdb_warn("failed to read zfs_ace_t at %#lx",
3940 wsp->walk_addr);
3941 return (WALK_ERR);
3942 }
3943
3944 switch (ace_data->ace_version) {
3945 case 0:
3946 acep = (ace_t *)&zace;
3947 entry_type = acep->a_flags & ACE_TYPE_FLAGS;
3948 allow_type = acep->a_type;
3949 break;
3950 case 1:
3951 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS;
3952 allow_type = zace.z_hdr.z_type;
3953 break;
3954 default:
3955 return (WALK_ERR);
3956 }
3957
3958 ptr = (uintptr_t)wsp->walk_addr;
3959 switch (entry_type) {
3960 case ACE_OWNER:
3961 case ACE_EVERYONE:
3962 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
3963 ptr += ace_data->ace_version == 0 ?
3964 sizeof (ace_t) : sizeof (zfs_ace_hdr_t);
3965 break;
3966 case ACE_IDENTIFIER_GROUP:
3967 default:
3968 switch (allow_type) {
3969 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
3970 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
3971 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
3972 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
3973 ptr += ace_data->ace_version == 0 ?
3974 sizeof (ace_t) : sizeof (zfs_object_ace_t);
3975 break;
3976 default:
3977 ptr += ace_data->ace_version == 0 ?
3978 sizeof (ace_t) : sizeof (zfs_ace_t);
3979 break;
3980 }
3981 }
3982
3983 ace_data->ace_count--;
3984 status = wsp->walk_callback(wsp->walk_addr,
3985 (void *)(uintptr_t)&zace, wsp->walk_cbdata);
3986
3987 wsp->walk_addr = ptr;
3988 return (status);
3989 }
3990
3991 typedef struct mdb_zfs_rrwlock {
3992 uintptr_t rr_writer;
3993 boolean_t rr_writer_wanted;
3994 } mdb_zfs_rrwlock_t;
3995
3996 static uint_t rrw_key;
3997
3998 /* ARGSUSED */
3999 static int
rrwlock(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)4000 rrwlock(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
4001 {
4002 mdb_zfs_rrwlock_t rrw;
4003
4004 if (rrw_key == 0) {
4005 if (mdb_ctf_readsym(&rrw_key, "uint_t", "rrw_tsd_key", 0) == -1)
4006 return (DCMD_ERR);
4007 }
4008
4009 if (mdb_ctf_vread(&rrw, "rrwlock_t", "mdb_zfs_rrwlock_t", addr,
4010 0) == -1)
4011 return (DCMD_ERR);
4012
4013 if (rrw.rr_writer != 0) {
4014 mdb_printf("write lock held by thread %lx\n", rrw.rr_writer);
4015 return (DCMD_OK);
4016 }
4017
4018 if (rrw.rr_writer_wanted) {
4019 mdb_printf("writer wanted\n");
4020 }
4021
4022 mdb_printf("anonymous references:\n");
4023 (void) mdb_call_dcmd("zfs_refcount", addr +
4024 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_anon_rcount"),
4025 DCMD_ADDRSPEC, 0, NULL);
4026
4027 mdb_printf("linked references:\n");
4028 (void) mdb_call_dcmd("zfs_refcount", addr +
4029 mdb_ctf_offsetof_by_name(ZFS_STRUCT "rrwlock", "rr_linked_rcount"),
4030 DCMD_ADDRSPEC, 0, NULL);
4031
4032 /*
4033 * XXX This should find references from
4034 * "::walk thread | ::tsd -v <rrw_key>", but there is no support
4035 * for programmatic consumption of dcmds, so this would be
4036 * difficult, potentially requiring reimplementing ::tsd (both
4037 * user and kernel versions) in this MDB module.
4038 */
4039
4040 return (DCMD_OK);
4041 }
4042
4043 typedef struct mdb_arc_buf_hdr_t {
4044 uint16_t b_psize;
4045 uint16_t b_lsize;
4046 struct {
4047 uint32_t b_bufcnt;
4048 uintptr_t b_state;
4049 } b_l1hdr;
4050 } mdb_arc_buf_hdr_t;
4051
4052 enum arc_cflags {
4053 ARC_CFLAG_VERBOSE = 1 << 0,
4054 ARC_CFLAG_ANON = 1 << 1,
4055 ARC_CFLAG_MRU = 1 << 2,
4056 ARC_CFLAG_MFU = 1 << 3,
4057 ARC_CFLAG_BUFS = 1 << 4,
4058 };
4059
4060 typedef struct arc_compression_stats_data {
4061 GElf_Sym anon_sym; /* ARC_anon symbol */
4062 GElf_Sym mru_sym; /* ARC_mru symbol */
4063 GElf_Sym mrug_sym; /* ARC_mru_ghost symbol */
4064 GElf_Sym mfu_sym; /* ARC_mfu symbol */
4065 GElf_Sym mfug_sym; /* ARC_mfu_ghost symbol */
4066 GElf_Sym l2c_sym; /* ARC_l2c_only symbol */
4067 uint64_t *anon_c_hist; /* histogram of compressed sizes in anon */
4068 uint64_t *anon_u_hist; /* histogram of uncompressed sizes in anon */
4069 uint64_t *anon_bufs; /* histogram of buffer counts in anon state */
4070 uint64_t *mru_c_hist; /* histogram of compressed sizes in mru */
4071 uint64_t *mru_u_hist; /* histogram of uncompressed sizes in mru */
4072 uint64_t *mru_bufs; /* histogram of buffer counts in mru */
4073 uint64_t *mfu_c_hist; /* histogram of compressed sizes in mfu */
4074 uint64_t *mfu_u_hist; /* histogram of uncompressed sizes in mfu */
4075 uint64_t *mfu_bufs; /* histogram of buffer counts in mfu */
4076 uint64_t *all_c_hist; /* histogram of compressed anon + mru + mfu */
4077 uint64_t *all_u_hist; /* histogram of uncompressed anon + mru + mfu */
4078 uint64_t *all_bufs; /* histogram of buffer counts in all states */
4079 int arc_cflags; /* arc compression flags, specified by user */
4080 int hist_nbuckets; /* number of buckets in each histogram */
4081
4082 ulong_t l1hdr_off; /* offset of b_l1hdr in arc_buf_hdr_t */
4083 } arc_compression_stats_data_t;
4084
4085 int
highbit64(uint64_t i)4086 highbit64(uint64_t i)
4087 {
4088 int h = 1;
4089
4090 if (i == 0)
4091 return (0);
4092 if (i & 0xffffffff00000000ULL) {
4093 h += 32; i >>= 32;
4094 }
4095 if (i & 0xffff0000) {
4096 h += 16; i >>= 16;
4097 }
4098 if (i & 0xff00) {
4099 h += 8; i >>= 8;
4100 }
4101 if (i & 0xf0) {
4102 h += 4; i >>= 4;
4103 }
4104 if (i & 0xc) {
4105 h += 2; i >>= 2;
4106 }
4107 if (i & 0x2) {
4108 h += 1;
4109 }
4110 return (h);
4111 }
4112
4113 /* ARGSUSED */
4114 static int
arc_compression_stats_cb(uintptr_t addr,const void * unknown,void * arg)4115 arc_compression_stats_cb(uintptr_t addr, const void *unknown, void *arg)
4116 {
4117 arc_compression_stats_data_t *data = arg;
4118 arc_flags_t flags;
4119 mdb_arc_buf_hdr_t hdr;
4120 int cbucket, ubucket, bufcnt;
4121
4122 /*
4123 * mdb_ctf_vread() uses the sizeof the target type (e.g.
4124 * sizeof (arc_buf_hdr_t) in the target) to read in the entire contents
4125 * of the target type into a buffer and then copy the values of the
4126 * desired members from the mdb typename (e.g. mdb_arc_buf_hdr_t) from
4127 * this buffer. Unfortunately, the way arc_buf_hdr_t is used by zfs,
4128 * the actual size allocated by the kernel for arc_buf_hdr_t is often
4129 * smaller than `sizeof (arc_buf_hdr_t)` (see the definitions of
4130 * l1arc_buf_hdr_t and arc_buf_hdr_t in
4131 * usr/src/uts/common/fs/zfs/arc.c). Attempting to read the entire
4132 * contents of arc_buf_hdr_t from the target (as mdb_ctf_vread() does)
4133 * can cause an error if the allocated size is indeed smaller--it's
4134 * possible that the 'missing' trailing members of arc_buf_hdr_t
4135 * (l1arc_buf_hdr_t and/or arc_buf_hdr_crypt_t) may fall into unmapped
4136 * memory.
4137 *
4138 * We use the GETMEMB macro instead which performs an mdb_vread()
4139 * but only reads enough of the target to retrieve the desired struct
4140 * member instead of the entire struct.
4141 */
4142 if (GETMEMB(addr, "arc_buf_hdr", b_flags, flags) == -1)
4143 return (WALK_ERR);
4144
4145 /*
4146 * We only count headers that have data loaded in the kernel.
4147 * This means an L1 header must be present as well as the data
4148 * that corresponds to the L1 header. If there's no L1 header,
4149 * we can skip the arc_buf_hdr_t completely. If it's present, we
4150 * must look at the ARC state (b_l1hdr.b_state) to determine if
4151 * the data is present.
4152 */
4153 if ((flags & ARC_FLAG_HAS_L1HDR) == 0)
4154 return (WALK_NEXT);
4155
4156 if (GETMEMB(addr, "arc_buf_hdr", b_psize, hdr.b_psize) == -1 ||
4157 GETMEMB(addr, "arc_buf_hdr", b_lsize, hdr.b_lsize) == -1 ||
4158 GETMEMB(addr + data->l1hdr_off, "l1arc_buf_hdr", b_bufcnt,
4159 hdr.b_l1hdr.b_bufcnt) == -1 ||
4160 GETMEMB(addr + data->l1hdr_off, "l1arc_buf_hdr", b_state,
4161 hdr.b_l1hdr.b_state) == -1)
4162 return (WALK_ERR);
4163
4164 /*
4165 * Headers in the ghost states, or the l2c_only state don't have
4166 * arc buffers linked off of them. Thus, their compressed size
4167 * is meaningless, so we skip these from the stats.
4168 */
4169 if (hdr.b_l1hdr.b_state == data->mrug_sym.st_value ||
4170 hdr.b_l1hdr.b_state == data->mfug_sym.st_value ||
4171 hdr.b_l1hdr.b_state == data->l2c_sym.st_value) {
4172 return (WALK_NEXT);
4173 }
4174
4175 /*
4176 * The physical size (compressed) and logical size
4177 * (uncompressed) are in units of SPA_MINBLOCKSIZE. By default,
4178 * we use the log2 of this value (rounded down to the nearest
4179 * integer) to determine the bucket to assign this header to.
4180 * Thus, the histogram is logarithmic with respect to the size
4181 * of the header. For example, the following is a mapping of the
4182 * bucket numbers and the range of header sizes they correspond to:
4183 *
4184 * 0: 0 byte headers
4185 * 1: 512 byte headers
4186 * 2: [1024 - 2048) byte headers
4187 * 3: [2048 - 4096) byte headers
4188 * 4: [4096 - 8192) byte headers
4189 * 5: [8192 - 16394) byte headers
4190 * 6: [16384 - 32768) byte headers
4191 * 7: [32768 - 65536) byte headers
4192 * 8: [65536 - 131072) byte headers
4193 * 9: 131072 byte headers
4194 *
4195 * If the ARC_CFLAG_VERBOSE flag was specified, we use the
4196 * physical and logical sizes directly. Thus, the histogram will
4197 * no longer be logarithmic; instead it will be linear with
4198 * respect to the size of the header. The following is a mapping
4199 * of the first many bucket numbers and the header size they
4200 * correspond to:
4201 *
4202 * 0: 0 byte headers
4203 * 1: 512 byte headers
4204 * 2: 1024 byte headers
4205 * 3: 1536 byte headers
4206 * 4: 2048 byte headers
4207 * 5: 2560 byte headers
4208 * 6: 3072 byte headers
4209 *
4210 * And so on. Keep in mind that a range of sizes isn't used in
4211 * the case of linear scale because the headers can only
4212 * increment or decrement in sizes of 512 bytes. So, it's not
4213 * possible for a header to be sized in between whats listed
4214 * above.
4215 *
4216 * Also, the above mapping values were calculated assuming a
4217 * SPA_MINBLOCKSHIFT of 512 bytes and a SPA_MAXBLOCKSIZE of 128K.
4218 */
4219
4220 if (data->arc_cflags & ARC_CFLAG_VERBOSE) {
4221 cbucket = hdr.b_psize;
4222 ubucket = hdr.b_lsize;
4223 } else {
4224 cbucket = highbit64(hdr.b_psize);
4225 ubucket = highbit64(hdr.b_lsize);
4226 }
4227
4228 bufcnt = hdr.b_l1hdr.b_bufcnt;
4229 if (bufcnt >= data->hist_nbuckets)
4230 bufcnt = data->hist_nbuckets - 1;
4231
4232 /* Ensure we stay within the bounds of the histogram array */
4233 ASSERT3U(cbucket, <, data->hist_nbuckets);
4234 ASSERT3U(ubucket, <, data->hist_nbuckets);
4235
4236 if (hdr.b_l1hdr.b_state == data->anon_sym.st_value) {
4237 data->anon_c_hist[cbucket]++;
4238 data->anon_u_hist[ubucket]++;
4239 data->anon_bufs[bufcnt]++;
4240 } else if (hdr.b_l1hdr.b_state == data->mru_sym.st_value) {
4241 data->mru_c_hist[cbucket]++;
4242 data->mru_u_hist[ubucket]++;
4243 data->mru_bufs[bufcnt]++;
4244 } else if (hdr.b_l1hdr.b_state == data->mfu_sym.st_value) {
4245 data->mfu_c_hist[cbucket]++;
4246 data->mfu_u_hist[ubucket]++;
4247 data->mfu_bufs[bufcnt]++;
4248 }
4249
4250 data->all_c_hist[cbucket]++;
4251 data->all_u_hist[ubucket]++;
4252 data->all_bufs[bufcnt]++;
4253
4254 return (WALK_NEXT);
4255 }
4256
4257 /* ARGSUSED */
4258 static int
arc_compression_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)4259 arc_compression_stats(uintptr_t addr, uint_t flags, int argc,
4260 const mdb_arg_t *argv)
4261 {
4262 arc_compression_stats_data_t data = { 0 };
4263 unsigned int max_shifted = SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT;
4264 unsigned int hist_size;
4265 char range[32];
4266 int rc = DCMD_OK;
4267 int off;
4268
4269 if (mdb_getopts(argc, argv,
4270 'v', MDB_OPT_SETBITS, ARC_CFLAG_VERBOSE, &data.arc_cflags,
4271 'a', MDB_OPT_SETBITS, ARC_CFLAG_ANON, &data.arc_cflags,
4272 'b', MDB_OPT_SETBITS, ARC_CFLAG_BUFS, &data.arc_cflags,
4273 'r', MDB_OPT_SETBITS, ARC_CFLAG_MRU, &data.arc_cflags,
4274 'f', MDB_OPT_SETBITS, ARC_CFLAG_MFU, &data.arc_cflags,
4275 NULL) != argc)
4276 return (DCMD_USAGE);
4277
4278 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_anon", &data.anon_sym) ||
4279 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru", &data.mru_sym) ||
4280 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mru_ghost", &data.mrug_sym) ||
4281 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu", &data.mfu_sym) ||
4282 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_mfu_ghost", &data.mfug_sym) ||
4283 mdb_lookup_by_obj(ZFS_OBJ_NAME, "ARC_l2c_only", &data.l2c_sym)) {
4284 mdb_warn("can't find arc state symbol");
4285 return (DCMD_ERR);
4286 }
4287
4288 /*
4289 * Determine the maximum expected size for any header, and use
4290 * this to determine the number of buckets needed for each
4291 * histogram. If ARC_CFLAG_VERBOSE is specified, this value is
4292 * used directly; otherwise the log2 of the maximum size is
4293 * used. Thus, if using a log2 scale there's a maximum of 10
4294 * possible buckets, while the linear scale (when using
4295 * ARC_CFLAG_VERBOSE) has a maximum of 257 buckets.
4296 */
4297 if (data.arc_cflags & ARC_CFLAG_VERBOSE)
4298 data.hist_nbuckets = max_shifted + 1;
4299 else
4300 data.hist_nbuckets = highbit64(max_shifted) + 1;
4301
4302 hist_size = sizeof (uint64_t) * data.hist_nbuckets;
4303
4304 data.anon_c_hist = mdb_zalloc(hist_size, UM_SLEEP);
4305 data.anon_u_hist = mdb_zalloc(hist_size, UM_SLEEP);
4306 data.anon_bufs = mdb_zalloc(hist_size, UM_SLEEP);
4307
4308 data.mru_c_hist = mdb_zalloc(hist_size, UM_SLEEP);
4309 data.mru_u_hist = mdb_zalloc(hist_size, UM_SLEEP);
4310 data.mru_bufs = mdb_zalloc(hist_size, UM_SLEEP);
4311
4312 data.mfu_c_hist = mdb_zalloc(hist_size, UM_SLEEP);
4313 data.mfu_u_hist = mdb_zalloc(hist_size, UM_SLEEP);
4314 data.mfu_bufs = mdb_zalloc(hist_size, UM_SLEEP);
4315
4316 data.all_c_hist = mdb_zalloc(hist_size, UM_SLEEP);
4317 data.all_u_hist = mdb_zalloc(hist_size, UM_SLEEP);
4318 data.all_bufs = mdb_zalloc(hist_size, UM_SLEEP);
4319
4320 if ((off = mdb_ctf_offsetof_by_name(ZFS_STRUCT "arc_buf_hdr",
4321 "b_l1hdr")) == -1) {
4322 mdb_warn("could not get offset of b_l1hdr from arc_buf_hdr_t");
4323 rc = DCMD_ERR;
4324 goto out;
4325 }
4326 data.l1hdr_off = off;
4327
4328 if (mdb_walk("arc_buf_hdr_t_full", arc_compression_stats_cb,
4329 &data) != 0) {
4330 mdb_warn("can't walk arc_buf_hdr's");
4331 rc = DCMD_ERR;
4332 goto out;
4333 }
4334
4335 if (data.arc_cflags & ARC_CFLAG_VERBOSE) {
4336 rc = mdb_snprintf(range, sizeof (range),
4337 "[n*%llu, (n+1)*%llu)", SPA_MINBLOCKSIZE,
4338 SPA_MINBLOCKSIZE);
4339 } else {
4340 rc = mdb_snprintf(range, sizeof (range),
4341 "[2^(n-1)*%llu, 2^n*%llu)", SPA_MINBLOCKSIZE,
4342 SPA_MINBLOCKSIZE);
4343 }
4344
4345 if (rc < 0) {
4346 /* snprintf failed, abort the dcmd */
4347 rc = DCMD_ERR;
4348 goto out;
4349 } else {
4350 /* snprintf succeeded above, reset return code */
4351 rc = DCMD_OK;
4352 }
4353
4354 if (data.arc_cflags & ARC_CFLAG_ANON) {
4355 if (data.arc_cflags & ARC_CFLAG_BUFS) {
4356 mdb_printf("Histogram of the number of anon buffers "
4357 "that are associated with an arc hdr.\n");
4358 dump_histogram(data.anon_bufs, data.hist_nbuckets, 0);
4359 mdb_printf("\n");
4360 }
4361 mdb_printf("Histogram of compressed anon buffers.\n"
4362 "Each bucket represents buffers of size: %s.\n", range);
4363 dump_histogram(data.anon_c_hist, data.hist_nbuckets, 0);
4364 mdb_printf("\n");
4365
4366 mdb_printf("Histogram of uncompressed anon buffers.\n"
4367 "Each bucket represents buffers of size: %s.\n", range);
4368 dump_histogram(data.anon_u_hist, data.hist_nbuckets, 0);
4369 mdb_printf("\n");
4370 }
4371
4372 if (data.arc_cflags & ARC_CFLAG_MRU) {
4373 if (data.arc_cflags & ARC_CFLAG_BUFS) {
4374 mdb_printf("Histogram of the number of mru buffers "
4375 "that are associated with an arc hdr.\n");
4376 dump_histogram(data.mru_bufs, data.hist_nbuckets, 0);
4377 mdb_printf("\n");
4378 }
4379 mdb_printf("Histogram of compressed mru buffers.\n"
4380 "Each bucket represents buffers of size: %s.\n", range);
4381 dump_histogram(data.mru_c_hist, data.hist_nbuckets, 0);
4382 mdb_printf("\n");
4383
4384 mdb_printf("Histogram of uncompressed mru buffers.\n"
4385 "Each bucket represents buffers of size: %s.\n", range);
4386 dump_histogram(data.mru_u_hist, data.hist_nbuckets, 0);
4387 mdb_printf("\n");
4388 }
4389
4390 if (data.arc_cflags & ARC_CFLAG_MFU) {
4391 if (data.arc_cflags & ARC_CFLAG_BUFS) {
4392 mdb_printf("Histogram of the number of mfu buffers "
4393 "that are associated with an arc hdr.\n");
4394 dump_histogram(data.mfu_bufs, data.hist_nbuckets, 0);
4395 mdb_printf("\n");
4396 }
4397
4398 mdb_printf("Histogram of compressed mfu buffers.\n"
4399 "Each bucket represents buffers of size: %s.\n", range);
4400 dump_histogram(data.mfu_c_hist, data.hist_nbuckets, 0);
4401 mdb_printf("\n");
4402
4403 mdb_printf("Histogram of uncompressed mfu buffers.\n"
4404 "Each bucket represents buffers of size: %s.\n", range);
4405 dump_histogram(data.mfu_u_hist, data.hist_nbuckets, 0);
4406 mdb_printf("\n");
4407 }
4408
4409 if (data.arc_cflags & ARC_CFLAG_BUFS) {
4410 mdb_printf("Histogram of all buffers that "
4411 "are associated with an arc hdr.\n");
4412 dump_histogram(data.all_bufs, data.hist_nbuckets, 0);
4413 mdb_printf("\n");
4414 }
4415
4416 mdb_printf("Histogram of all compressed buffers.\n"
4417 "Each bucket represents buffers of size: %s.\n", range);
4418 dump_histogram(data.all_c_hist, data.hist_nbuckets, 0);
4419 mdb_printf("\n");
4420
4421 mdb_printf("Histogram of all uncompressed buffers.\n"
4422 "Each bucket represents buffers of size: %s.\n", range);
4423 dump_histogram(data.all_u_hist, data.hist_nbuckets, 0);
4424
4425 out:
4426 mdb_free(data.anon_c_hist, hist_size);
4427 mdb_free(data.anon_u_hist, hist_size);
4428 mdb_free(data.anon_bufs, hist_size);
4429
4430 mdb_free(data.mru_c_hist, hist_size);
4431 mdb_free(data.mru_u_hist, hist_size);
4432 mdb_free(data.mru_bufs, hist_size);
4433
4434 mdb_free(data.mfu_c_hist, hist_size);
4435 mdb_free(data.mfu_u_hist, hist_size);
4436 mdb_free(data.mfu_bufs, hist_size);
4437
4438 mdb_free(data.all_c_hist, hist_size);
4439 mdb_free(data.all_u_hist, hist_size);
4440 mdb_free(data.all_bufs, hist_size);
4441
4442 return (rc);
4443 }
4444
4445 typedef struct mdb_range_seg64 {
4446 uint64_t rs_start;
4447 uint64_t rs_end;
4448 } mdb_range_seg64_t;
4449
4450 typedef struct mdb_range_seg32 {
4451 uint32_t rs_start;
4452 uint32_t rs_end;
4453 } mdb_range_seg32_t;
4454
4455 /* ARGSUSED */
4456 static int
range_tree_cb(uintptr_t addr,const void * unknown,void * arg)4457 range_tree_cb(uintptr_t addr, const void *unknown, void *arg)
4458 {
4459 mdb_range_tree_t *rt = (mdb_range_tree_t *)arg;
4460 uint64_t start, end;
4461
4462 if (rt->rt_type == RANGE_SEG64) {
4463 mdb_range_seg64_t rs;
4464
4465 if (mdb_ctf_vread(&rs, ZFS_STRUCT "range_seg64",
4466 "mdb_range_seg64_t", addr, 0) == -1)
4467 return (DCMD_ERR);
4468 start = rs.rs_start;
4469 end = rs.rs_end;
4470 } else {
4471 ASSERT3U(rt->rt_type, ==, RANGE_SEG32);
4472 mdb_range_seg32_t rs;
4473
4474 if (mdb_ctf_vread(&rs, ZFS_STRUCT "range_seg32",
4475 "mdb_range_seg32_t", addr, 0) == -1)
4476 return (DCMD_ERR);
4477 start = ((uint64_t)rs.rs_start << rt->rt_shift) + rt->rt_start;
4478 end = ((uint64_t)rs.rs_end << rt->rt_shift) + rt->rt_start;
4479 }
4480
4481 mdb_printf("\t[%llx %llx) (length %llx)\n", start, end, end - start);
4482
4483 return (0);
4484 }
4485
4486 /* ARGSUSED */
4487 static int
range_tree(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)4488 range_tree(uintptr_t addr, uint_t flags, int argc,
4489 const mdb_arg_t *argv)
4490 {
4491 mdb_range_tree_t rt;
4492 uintptr_t btree_addr;
4493
4494 if (!(flags & DCMD_ADDRSPEC))
4495 return (DCMD_USAGE);
4496
4497 if (mdb_ctf_vread(&rt, ZFS_STRUCT "range_tree", "mdb_range_tree_t",
4498 addr, 0) == -1)
4499 return (DCMD_ERR);
4500
4501 mdb_printf("%p: range tree of %llu entries, %llu bytes\n",
4502 addr, rt.rt_root.bt_num_elems, rt.rt_space);
4503
4504 btree_addr = addr +
4505 mdb_ctf_offsetof_by_name(ZFS_STRUCT "range_tree", "rt_root");
4506
4507 if (mdb_pwalk("zfs_btree", range_tree_cb, &rt, btree_addr) != 0) {
4508 mdb_warn("can't walk range_tree segments");
4509 return (DCMD_ERR);
4510 }
4511 return (DCMD_OK);
4512 }
4513
4514 typedef struct mdb_spa_log_sm {
4515 uint64_t sls_sm_obj;
4516 uint64_t sls_txg;
4517 uint64_t sls_nblocks;
4518 uint64_t sls_mscount;
4519 } mdb_spa_log_sm_t;
4520
4521 /* ARGSUSED */
4522 static int
logsm_stats_cb(uintptr_t addr,const void * unknown,void * arg)4523 logsm_stats_cb(uintptr_t addr, const void *unknown, void *arg)
4524 {
4525 mdb_spa_log_sm_t sls;
4526 if (mdb_ctf_vread(&sls, ZFS_STRUCT "spa_log_sm", "mdb_spa_log_sm_t",
4527 addr, 0) == -1)
4528 return (WALK_ERR);
4529
4530 mdb_printf("%7lld %7lld %7lld %7lld\n",
4531 sls.sls_txg, sls.sls_nblocks, sls.sls_mscount, sls.sls_sm_obj);
4532
4533 return (WALK_NEXT);
4534 }
4535 typedef struct mdb_log_summary_entry {
4536 uint64_t lse_start;
4537 uint64_t lse_blkcount;
4538 uint64_t lse_mscount;
4539 } mdb_log_summary_entry_t;
4540
4541 /* ARGSUSED */
4542 static int
logsm_summary_cb(uintptr_t addr,const void * unknown,void * arg)4543 logsm_summary_cb(uintptr_t addr, const void *unknown, void *arg)
4544 {
4545 mdb_log_summary_entry_t lse;
4546 if (mdb_ctf_vread(&lse, ZFS_STRUCT "log_summary_entry",
4547 "mdb_log_summary_entry_t", addr, 0) == -1)
4548 return (WALK_ERR);
4549
4550 mdb_printf("%7lld %7lld %7lld\n",
4551 lse.lse_start, lse.lse_blkcount, lse.lse_mscount);
4552 return (WALK_NEXT);
4553 }
4554
4555 /* ARGSUSED */
4556 static int
logsm_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)4557 logsm_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
4558 {
4559 if (!(flags & DCMD_ADDRSPEC))
4560 return (DCMD_USAGE);
4561
4562 uintptr_t sls_avl_addr = addr +
4563 mdb_ctf_offsetof_by_name(ZFS_STRUCT "spa", "spa_sm_logs_by_txg");
4564 uintptr_t summary_addr = addr +
4565 mdb_ctf_offsetof_by_name(ZFS_STRUCT "spa", "spa_log_summary");
4566
4567 mdb_printf("Log Entries:\n");
4568 mdb_printf("%7s %7s %7s %7s\n", "txg", "blk", "ms", "obj");
4569 if (mdb_pwalk("avl", logsm_stats_cb, NULL, sls_avl_addr) != 0)
4570 return (DCMD_ERR);
4571
4572 mdb_printf("\nSummary Entries:\n");
4573 mdb_printf("%7s %7s %7s\n", "txg", "blk", "ms");
4574 if (mdb_pwalk("list", logsm_summary_cb, NULL, summary_addr) != 0)
4575 return (DCMD_ERR);
4576
4577 return (DCMD_OK);
4578 }
4579
4580 /*
4581 * MDB module linkage information:
4582 *
4583 * We declare a list of structures describing our dcmds, and a function
4584 * named _mdb_init to return a pointer to our module information.
4585 */
4586
4587 static const mdb_dcmd_t dcmds[] = {
4588 { "arc", "[-bkmg]", "print ARC variables", arc_print },
4589 { "blkptr", ":", "print blkptr_t", blkptr },
4590 { "dva", ":", "print dva_t", dva },
4591 { "dbuf", ":", "print dmu_buf_impl_t", dbuf },
4592 { "dbuf_stats", ":", "dbuf stats", dbuf_stats },
4593 { "dbufs",
4594 "\t[-O objset_t*] [-n objset_name | \"mos\"] "
4595 "[-o object | \"mdn\"] \n"
4596 "\t[-l level] [-b blkid | \"bonus\"]",
4597 "find dmu_buf_impl_t's that match specified criteria", dbufs },
4598 { "abuf_find", "dva_word[0] dva_word[1]",
4599 "find arc_buf_hdr_t of a specified DVA",
4600 abuf_find },
4601 { "logsm_stats", ":", "print log space map statistics of a spa_t",
4602 logsm_stats},
4603 { "spa", "?[-cevmMh]\n"
4604 "\t-c display spa config\n"
4605 "\t-e display vdev statistics\n"
4606 "\t-v display vdev information\n"
4607 "\t-m display metaslab statistics\n"
4608 "\t-M display metaslab group statistics\n"
4609 "\t-h display histogram (requires -m or -M)\n",
4610 "spa_t summary", spa_print },
4611 { "spa_config", ":", "print spa_t configuration", spa_print_config },
4612 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space },
4613 { "spa_vdevs", ":[-emMh]\n"
4614 "\t-e display vdev statistics\n"
4615 "\t-m dispaly metaslab statistics\n"
4616 "\t-M display metaslab group statistic\n"
4617 "\t-h display histogram (requires -m or -M)\n",
4618 "given a spa_t, print vdev summary", spa_vdevs },
4619 { "sm_entries", "<buffer length in bytes>",
4620 "print out space map entries from a buffer decoded",
4621 sm_entries},
4622 { "vdev", ":[-remMh]\n"
4623 "\t-r display recursively\n"
4624 "\t-e display statistics\n"
4625 "\t-m display metaslab statistics (top level vdev only)\n"
4626 "\t-M display metaslab group statistics (top level vdev only)\n"
4627 "\t-h display histogram (requires -m or -M)\n",
4628 "vdev_t summary", vdev_print },
4629 { "zio", ":[-cpr]\n"
4630 "\t-c display children\n"
4631 "\t-p display parents\n"
4632 "\t-r display recursively",
4633 "zio_t summary", zio_print },
4634 { "zio_state", "?", "print out all zio_t structures on system or "
4635 "for a particular pool", zio_state },
4636 { "zfs_blkstats", ":[-v]",
4637 "given a spa_t, print block type stats from last scrub",
4638 zfs_blkstats },
4639 { "zfs_params", "", "print zfs tunable parameters", zfs_params },
4640 { "zfs_refcount", ":[-r]\n"
4641 "\t-r display recently removed references",
4642 "print zfs_refcount_t holders", zfs_refcount },
4643 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf },
4644 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t",
4645 zfs_acl_dump },
4646 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print },
4647 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print },
4648 { "sa_attr_table", ":", "print SA attribute table from sa_os_t",
4649 sa_attr_table},
4650 { "sa_attr", ": attr_id",
4651 "print SA attribute address when given sa_handle_t", sa_attr_print},
4652 { "zfs_dbgmsg", ":[-var]",
4653 "print zfs debug log", dbgmsg},
4654 { "rrwlock", ":",
4655 "print rrwlock_t, including readers", rrwlock},
4656 { "metaslab_weight", "weight",
4657 "print metaslab weight", metaslab_weight},
4658 { "metaslab_trace", ":",
4659 "print metaslab allocation trace records", metaslab_trace},
4660 { "arc_compression_stats", ":[-vabrf]\n"
4661 "\t-v verbose, display a linearly scaled histogram\n"
4662 "\t-a display ARC_anon state statistics individually\n"
4663 "\t-r display ARC_mru state statistics individually\n"
4664 "\t-f display ARC_mfu state statistics individually\n"
4665 "\t-b display histogram of buffer counts\n",
4666 "print a histogram of compressed arc buffer sizes",
4667 arc_compression_stats},
4668 { "range_tree", ":",
4669 "print entries in range_tree_t", range_tree},
4670 { NULL }
4671 };
4672
4673 static const mdb_walker_t walkers[] = {
4674 { "txg_list", "given any txg_list_t *, walk all entries in all txgs",
4675 txg_list_walk_init, txg_list_walk_step, NULL },
4676 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0",
4677 txg_list0_walk_init, txg_list_walk_step, NULL },
4678 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1",
4679 txg_list1_walk_init, txg_list_walk_step, NULL },
4680 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2",
4681 txg_list2_walk_init, txg_list_walk_step, NULL },
4682 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3",
4683 txg_list3_walk_init, txg_list_walk_step, NULL },
4684 { "zio", "walk all zio structures, optionally for a particular spa_t",
4685 zio_walk_init, zio_walk_step, NULL },
4686 { "zio_root",
4687 "walk all root zio_t structures, optionally for a particular spa_t",
4688 zio_walk_init, zio_walk_root_step, NULL },
4689 { "spa", "walk all spa_t entries in the namespace",
4690 spa_walk_init, spa_walk_step, NULL },
4691 { "metaslab", "given a spa_t *, walk all metaslab_t structures",
4692 metaslab_walk_init, metaslab_walk_step, NULL },
4693 { "multilist", "given a multilist_t *, walk all list_t structures",
4694 multilist_walk_init, multilist_walk_step, NULL },
4695 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes",
4696 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL },
4697 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs",
4698 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL },
4699 { "zfs_acl_node_aces0",
4700 "given a zfs_acl_node_t, walk all ACEs as ace_t",
4701 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL },
4702 { "zfs_btree", "given a zfs_btree_t *, walk all entries",
4703 btree_walk_init, btree_walk_step, btree_walk_fini },
4704 { NULL }
4705 };
4706
4707 static const mdb_modinfo_t modinfo = {
4708 MDB_API_VERSION, dcmds, walkers
4709 };
4710
4711 const mdb_modinfo_t *
_mdb_init(void)4712 _mdb_init(void)
4713 {
4714 return (&modinfo);
4715 }
4716