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