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 */
24
25 /* Portions Copyright 2010 Robert Milkowski */
26
27 #include <mdb/mdb_ctf.h>
28 #include <sys/zfs_context.h>
29 #include <sys/mdb_modapi.h>
30 #include <sys/dbuf.h>
31 #include <sys/dmu_objset.h>
32 #include <sys/dsl_dir.h>
33 #include <sys/dsl_pool.h>
34 #include <sys/metaslab_impl.h>
35 #include <sys/space_map.h>
36 #include <sys/list.h>
37 #include <sys/spa_impl.h>
38 #include <sys/vdev_impl.h>
39 #include <sys/zap_leaf.h>
40 #include <sys/zap_impl.h>
41 #include <ctype.h>
42 #include <sys/zfs_acl.h>
43 #include <sys/sa_impl.h>
44
45 #ifdef _KERNEL
46 #define ZFS_OBJ_NAME "zfs"
47 #else
48 #define ZFS_OBJ_NAME "libzpool.so.1"
49 #endif
50
51 #ifndef _KERNEL
52 int aok;
53 #endif
54
55 static int
getmember(uintptr_t addr,const char * type,mdb_ctf_id_t * idp,const char * member,int len,void * buf)56 getmember(uintptr_t addr, const char *type, mdb_ctf_id_t *idp,
57 const char *member, int len, void *buf)
58 {
59 mdb_ctf_id_t id;
60 ulong_t off;
61 char name[64];
62
63 if (idp == NULL) {
64 if (mdb_ctf_lookup_by_name(type, &id) == -1) {
65 mdb_warn("couldn't find type %s", type);
66 return (DCMD_ERR);
67 }
68 idp = &id;
69 } else {
70 type = name;
71 mdb_ctf_type_name(*idp, name, sizeof (name));
72 }
73
74 if (mdb_ctf_offsetof(*idp, member, &off) == -1) {
75 mdb_warn("couldn't find member %s of type %s\n", member, type);
76 return (DCMD_ERR);
77 }
78 if (off % 8 != 0) {
79 mdb_warn("member %s of type %s is unsupported bitfield",
80 member, type);
81 return (DCMD_ERR);
82 }
83 off /= 8;
84
85 if (mdb_vread(buf, len, addr + off) == -1) {
86 mdb_warn("failed to read %s from %s at %p",
87 member, type, addr + off);
88 return (DCMD_ERR);
89 }
90 /* mdb_warn("read %s from %s at %p+%llx\n", member, type, addr, off); */
91
92 return (0);
93 }
94
95 #define GETMEMB(addr, type, member, dest) \
96 getmember(addr, #type, NULL, #member, sizeof (dest), &(dest))
97
98 #define GETMEMBID(addr, ctfid, member, dest) \
99 getmember(addr, NULL, ctfid, #member, sizeof (dest), &(dest))
100
101 static int
getrefcount(uintptr_t addr,mdb_ctf_id_t * id,const char * member,uint64_t * rc)102 getrefcount(uintptr_t addr, mdb_ctf_id_t *id,
103 const char *member, uint64_t *rc)
104 {
105 static int gotid;
106 static mdb_ctf_id_t rc_id;
107 ulong_t off;
108
109 if (!gotid) {
110 if (mdb_ctf_lookup_by_name("struct refcount", &rc_id) == -1) {
111 mdb_warn("couldn't find struct refcount");
112 return (DCMD_ERR);
113 }
114 gotid = TRUE;
115 }
116
117 if (mdb_ctf_offsetof(*id, member, &off) == -1) {
118 char name[64];
119 mdb_ctf_type_name(*id, name, sizeof (name));
120 mdb_warn("couldn't find member %s of type %s\n", member, name);
121 return (DCMD_ERR);
122 }
123 off /= 8;
124
125 return (GETMEMBID(addr + off, &rc_id, rc_count, *rc));
126 }
127
128 static boolean_t
strisprint(const char * cp)129 strisprint(const char *cp)
130 {
131 for (; *cp; cp++) {
132 if (!isprint(*cp))
133 return (B_FALSE);
134 }
135 return (B_TRUE);
136 }
137
138 static int verbose;
139
140 static int
freelist_walk_init(mdb_walk_state_t * wsp)141 freelist_walk_init(mdb_walk_state_t *wsp)
142 {
143 if (wsp->walk_addr == NULL) {
144 mdb_warn("must supply starting address\n");
145 return (WALK_ERR);
146 }
147
148 wsp->walk_data = 0; /* Index into the freelist */
149 return (WALK_NEXT);
150 }
151
152 static int
freelist_walk_step(mdb_walk_state_t * wsp)153 freelist_walk_step(mdb_walk_state_t *wsp)
154 {
155 uint64_t entry;
156 uintptr_t number = (uintptr_t)wsp->walk_data;
157 char *ddata[] = { "ALLOC", "FREE", "CONDENSE", "INVALID",
158 "INVALID", "INVALID", "INVALID", "INVALID" };
159 int mapshift = SPA_MINBLOCKSHIFT;
160
161 if (mdb_vread(&entry, sizeof (entry), wsp->walk_addr) == -1) {
162 mdb_warn("failed to read freelist entry %p", wsp->walk_addr);
163 return (WALK_DONE);
164 }
165 wsp->walk_addr += sizeof (entry);
166 wsp->walk_data = (void *)(number + 1);
167
168 if (SM_DEBUG_DECODE(entry)) {
169 mdb_printf("DEBUG: %3u %10s: txg=%llu pass=%llu\n",
170 number,
171 ddata[SM_DEBUG_ACTION_DECODE(entry)],
172 SM_DEBUG_TXG_DECODE(entry),
173 SM_DEBUG_SYNCPASS_DECODE(entry));
174 } else {
175 mdb_printf("Entry: %3u offsets=%08llx-%08llx type=%c "
176 "size=%06llx", number,
177 SM_OFFSET_DECODE(entry) << mapshift,
178 (SM_OFFSET_DECODE(entry) + SM_RUN_DECODE(entry)) <<
179 mapshift,
180 SM_TYPE_DECODE(entry) == SM_ALLOC ? 'A' : 'F',
181 SM_RUN_DECODE(entry) << mapshift);
182 if (verbose)
183 mdb_printf(" (raw=%012llx)\n", entry);
184 mdb_printf("\n");
185 }
186 return (WALK_NEXT);
187 }
188
189
190 static int
dataset_name(uintptr_t addr,char * buf)191 dataset_name(uintptr_t addr, char *buf)
192 {
193 static int gotid;
194 static mdb_ctf_id_t dd_id;
195 uintptr_t dd_parent;
196 char dd_myname[MAXNAMELEN];
197
198 if (!gotid) {
199 if (mdb_ctf_lookup_by_name("struct dsl_dir",
200 &dd_id) == -1) {
201 mdb_warn("couldn't find struct dsl_dir");
202 return (DCMD_ERR);
203 }
204 gotid = TRUE;
205 }
206 if (GETMEMBID(addr, &dd_id, dd_parent, dd_parent) ||
207 GETMEMBID(addr, &dd_id, dd_myname, dd_myname)) {
208 return (DCMD_ERR);
209 }
210
211 if (dd_parent) {
212 if (dataset_name(dd_parent, buf))
213 return (DCMD_ERR);
214 strcat(buf, "/");
215 }
216
217 if (dd_myname[0])
218 strcat(buf, dd_myname);
219 else
220 strcat(buf, "???");
221
222 return (0);
223 }
224
225 static int
objset_name(uintptr_t addr,char * buf)226 objset_name(uintptr_t addr, char *buf)
227 {
228 static int gotid;
229 static mdb_ctf_id_t os_id, ds_id;
230 uintptr_t os_dsl_dataset;
231 char ds_snapname[MAXNAMELEN];
232 uintptr_t ds_dir;
233
234 buf[0] = '\0';
235
236 if (!gotid) {
237 if (mdb_ctf_lookup_by_name("struct objset",
238 &os_id) == -1) {
239 mdb_warn("couldn't find struct objset");
240 return (DCMD_ERR);
241 }
242 if (mdb_ctf_lookup_by_name("struct dsl_dataset",
243 &ds_id) == -1) {
244 mdb_warn("couldn't find struct dsl_dataset");
245 return (DCMD_ERR);
246 }
247
248 gotid = TRUE;
249 }
250
251 if (GETMEMBID(addr, &os_id, os_dsl_dataset, os_dsl_dataset))
252 return (DCMD_ERR);
253
254 if (os_dsl_dataset == 0) {
255 strcat(buf, "mos");
256 return (0);
257 }
258
259 if (GETMEMBID(os_dsl_dataset, &ds_id, ds_snapname, ds_snapname) ||
260 GETMEMBID(os_dsl_dataset, &ds_id, ds_dir, ds_dir)) {
261 return (DCMD_ERR);
262 }
263
264 if (ds_dir && dataset_name(ds_dir, buf))
265 return (DCMD_ERR);
266
267 if (ds_snapname[0]) {
268 strcat(buf, "@");
269 strcat(buf, ds_snapname);
270 }
271 return (0);
272 }
273
274 static void
enum_lookup(char * out,size_t size,mdb_ctf_id_t id,int val,const char * prefix)275 enum_lookup(char *out, size_t size, mdb_ctf_id_t id, int val,
276 const char *prefix)
277 {
278 const char *cp;
279 size_t len = strlen(prefix);
280
281 if ((cp = mdb_ctf_enum_name(id, val)) != NULL) {
282 if (strncmp(cp, prefix, len) == 0)
283 cp += len;
284 (void) strncpy(out, cp, size);
285 } else {
286 mdb_snprintf(out, size, "? (%d)", val);
287 }
288 }
289
290 /* ARGSUSED */
291 static int
zfs_params(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)292 zfs_params(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
293 {
294 /*
295 * This table can be approximately generated by running:
296 * egrep "^[a-z0-9_]+ [a-z0-9_]+( =.*)?;" *.c | cut -d ' ' -f 2
297 */
298 static const char *params[] = {
299 "arc_reduce_dnlc_percent",
300 "zfs_arc_max",
301 "zfs_arc_min",
302 "arc_shrink_shift",
303 "zfs_mdcomp_disable",
304 "zfs_prefetch_disable",
305 "zfetch_max_streams",
306 "zfetch_min_sec_reap",
307 "zfetch_block_cap",
308 "zfetch_array_rd_sz",
309 "zfs_default_bs",
310 "zfs_default_ibs",
311 "metaslab_aliquot",
312 "reference_tracking_enable",
313 "reference_history",
314 "spa_max_replication_override",
315 "spa_mode_global",
316 "zfs_flags",
317 "zfs_txg_synctime",
318 "zfs_txg_timeout",
319 "zfs_write_limit_min",
320 "zfs_write_limit_max",
321 "zfs_write_limit_shift",
322 "zfs_write_limit_override",
323 "zfs_no_write_throttle",
324 "zfs_vdev_cache_max",
325 "zfs_vdev_cache_size",
326 "zfs_vdev_cache_bshift",
327 "vdev_mirror_shift",
328 "zfs_vdev_max_pending",
329 "zfs_vdev_min_pending",
330 "zfs_scrub_limit",
331 "zfs_no_scrub_io",
332 "zfs_no_scrub_prefetch",
333 "zfs_vdev_time_shift",
334 "zfs_vdev_ramp_rate",
335 "zfs_vdev_aggregation_limit",
336 "fzap_default_block_shift",
337 "zfs_immediate_write_sz",
338 "zfs_read_chunk_size",
339 "zfs_nocacheflush",
340 "zil_replay_disable",
341 "metaslab_gang_bang",
342 "metaslab_df_alloc_threshold",
343 "metaslab_df_free_pct",
344 "zio_injection_enabled",
345 "zvol_immediate_write_sz",
346 };
347
348 for (int i = 0; i < sizeof (params) / sizeof (params[0]); i++) {
349 int sz;
350 uint64_t val64;
351 uint32_t *val32p = (uint32_t *)&val64;
352
353 sz = mdb_readvar(&val64, params[i]);
354 if (sz == 4) {
355 mdb_printf("%s = 0x%x\n", params[i], *val32p);
356 } else if (sz == 8) {
357 mdb_printf("%s = 0x%llx\n", params[i], val64);
358 } else {
359 mdb_warn("variable %s not found", params[i]);
360 }
361 }
362
363 return (DCMD_OK);
364 }
365
366 /* ARGSUSED */
367 static int
blkptr(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)368 blkptr(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
369 {
370 mdb_ctf_id_t type_enum, checksum_enum, compress_enum;
371 char type[80], checksum[80], compress[80];
372 blkptr_t blk, *bp = &blk;
373 char buf[BP_SPRINTF_LEN];
374
375 if (mdb_vread(&blk, sizeof (blkptr_t), addr) == -1) {
376 mdb_warn("failed to read blkptr_t");
377 return (DCMD_ERR);
378 }
379
380 if (mdb_ctf_lookup_by_name("enum dmu_object_type", &type_enum) == -1 ||
381 mdb_ctf_lookup_by_name("enum zio_checksum", &checksum_enum) == -1 ||
382 mdb_ctf_lookup_by_name("enum zio_compress", &compress_enum) == -1) {
383 mdb_warn("Could not find blkptr enumerated types");
384 return (DCMD_ERR);
385 }
386
387 enum_lookup(type, sizeof (type), type_enum,
388 BP_GET_TYPE(bp), "DMU_OT_");
389 enum_lookup(checksum, sizeof (checksum), checksum_enum,
390 BP_GET_CHECKSUM(bp), "ZIO_CHECKSUM_");
391 enum_lookup(compress, sizeof (compress), compress_enum,
392 BP_GET_COMPRESS(bp), "ZIO_COMPRESS_");
393
394 SPRINTF_BLKPTR(mdb_snprintf, '\n', buf, bp, type, checksum, compress);
395
396 mdb_printf("%s\n", buf);
397
398 return (DCMD_OK);
399 }
400
401 /* ARGSUSED */
402 static int
dbuf(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)403 dbuf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
404 {
405 mdb_ctf_id_t id;
406 dmu_buf_t db;
407 uintptr_t objset;
408 uint8_t level;
409 uint64_t blkid;
410 uint64_t holds;
411 char objectname[32];
412 char blkidname[32];
413 char path[MAXNAMELEN];
414
415 if (DCMD_HDRSPEC(flags)) {
416 mdb_printf(" addr object lvl blkid holds os\n");
417 }
418
419 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &id) == -1) {
420 mdb_warn("couldn't find struct dmu_buf_impl_t");
421 return (DCMD_ERR);
422 }
423
424 if (GETMEMBID(addr, &id, db_objset, objset) ||
425 GETMEMBID(addr, &id, db, db) ||
426 GETMEMBID(addr, &id, db_level, level) ||
427 GETMEMBID(addr, &id, db_blkid, blkid)) {
428 return (WALK_ERR);
429 }
430
431 if (getrefcount(addr, &id, "db_holds", &holds)) {
432 return (WALK_ERR);
433 }
434
435 if (db.db_object == DMU_META_DNODE_OBJECT)
436 (void) strcpy(objectname, "mdn");
437 else
438 (void) mdb_snprintf(objectname, sizeof (objectname), "%llx",
439 (u_longlong_t)db.db_object);
440
441 if (blkid == DMU_BONUS_BLKID)
442 (void) strcpy(blkidname, "bonus");
443 else
444 (void) mdb_snprintf(blkidname, sizeof (blkidname), "%llx",
445 (u_longlong_t)blkid);
446
447 if (objset_name(objset, path)) {
448 return (WALK_ERR);
449 }
450
451 mdb_printf("%p %8s %1u %9s %2llu %s\n",
452 addr, objectname, level, blkidname, holds, path);
453
454 return (DCMD_OK);
455 }
456
457 /* ARGSUSED */
458 static int
dbuf_stats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)459 dbuf_stats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
460 {
461 #define HISTOSZ 32
462 uintptr_t dbp;
463 dmu_buf_impl_t db;
464 dbuf_hash_table_t ht;
465 uint64_t bucket, ndbufs;
466 uint64_t histo[HISTOSZ];
467 uint64_t histo2[HISTOSZ];
468 int i, maxidx;
469
470 if (mdb_readvar(&ht, "dbuf_hash_table") == -1) {
471 mdb_warn("failed to read 'dbuf_hash_table'");
472 return (DCMD_ERR);
473 }
474
475 for (i = 0; i < HISTOSZ; i++) {
476 histo[i] = 0;
477 histo2[i] = 0;
478 }
479
480 ndbufs = 0;
481 for (bucket = 0; bucket < ht.hash_table_mask+1; bucket++) {
482 int len;
483
484 if (mdb_vread(&dbp, sizeof (void *),
485 (uintptr_t)(ht.hash_table+bucket)) == -1) {
486 mdb_warn("failed to read hash bucket %u at %p",
487 bucket, ht.hash_table+bucket);
488 return (DCMD_ERR);
489 }
490
491 len = 0;
492 while (dbp != 0) {
493 if (mdb_vread(&db, sizeof (dmu_buf_impl_t),
494 dbp) == -1) {
495 mdb_warn("failed to read dbuf at %p", dbp);
496 return (DCMD_ERR);
497 }
498 dbp = (uintptr_t)db.db_hash_next;
499 for (i = MIN(len, HISTOSZ - 1); i >= 0; i--)
500 histo2[i]++;
501 len++;
502 ndbufs++;
503 }
504
505 if (len >= HISTOSZ)
506 len = HISTOSZ-1;
507 histo[len]++;
508 }
509
510 mdb_printf("hash table has %llu buckets, %llu dbufs "
511 "(avg %llu buckets/dbuf)\n",
512 ht.hash_table_mask+1, ndbufs,
513 (ht.hash_table_mask+1)/ndbufs);
514
515 mdb_printf("\n");
516 maxidx = 0;
517 for (i = 0; i < HISTOSZ; i++)
518 if (histo[i] > 0)
519 maxidx = i;
520 mdb_printf("hash chain length number of buckets\n");
521 for (i = 0; i <= maxidx; i++)
522 mdb_printf("%u %llu\n", i, histo[i]);
523
524 mdb_printf("\n");
525 maxidx = 0;
526 for (i = 0; i < HISTOSZ; i++)
527 if (histo2[i] > 0)
528 maxidx = i;
529 mdb_printf("hash chain depth number of dbufs\n");
530 for (i = 0; i <= maxidx; i++)
531 mdb_printf("%u or more %llu %llu%%\n",
532 i, histo2[i], histo2[i]*100/ndbufs);
533
534
535 return (DCMD_OK);
536 }
537
538 #define CHAIN_END 0xffff
539 /*
540 * ::zap_leaf [-v]
541 *
542 * Print a zap_leaf_phys_t, assumed to be 16k
543 */
544 /* ARGSUSED */
545 static int
zap_leaf(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)546 zap_leaf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
547 {
548 char buf[16*1024];
549 int verbose = B_FALSE;
550 int four = B_FALSE;
551 zap_leaf_t l;
552 zap_leaf_phys_t *zlp = (void *)buf;
553 int i;
554
555 if (mdb_getopts(argc, argv,
556 'v', MDB_OPT_SETBITS, TRUE, &verbose,
557 '4', MDB_OPT_SETBITS, TRUE, &four,
558 NULL) != argc)
559 return (DCMD_USAGE);
560
561 l.l_phys = zlp;
562 l.l_bs = 14; /* assume 16k blocks */
563 if (four)
564 l.l_bs = 12;
565
566 if (!(flags & DCMD_ADDRSPEC)) {
567 return (DCMD_USAGE);
568 }
569
570 if (mdb_vread(buf, sizeof (buf), addr) == -1) {
571 mdb_warn("failed to read zap_leaf_phys_t at %p", addr);
572 return (DCMD_ERR);
573 }
574
575 if (zlp->l_hdr.lh_block_type != ZBT_LEAF ||
576 zlp->l_hdr.lh_magic != ZAP_LEAF_MAGIC) {
577 mdb_warn("This does not appear to be a zap_leaf_phys_t");
578 return (DCMD_ERR);
579 }
580
581 mdb_printf("zap_leaf_phys_t at %p:\n", addr);
582 mdb_printf(" lh_prefix_len = %u\n", zlp->l_hdr.lh_prefix_len);
583 mdb_printf(" lh_prefix = %llx\n", zlp->l_hdr.lh_prefix);
584 mdb_printf(" lh_nentries = %u\n", zlp->l_hdr.lh_nentries);
585 mdb_printf(" lh_nfree = %u\n", zlp->l_hdr.lh_nfree,
586 zlp->l_hdr.lh_nfree * 100 / (ZAP_LEAF_NUMCHUNKS(&l)));
587 mdb_printf(" lh_freelist = %u\n", zlp->l_hdr.lh_freelist);
588 mdb_printf(" lh_flags = %x (%s)\n", zlp->l_hdr.lh_flags,
589 zlp->l_hdr.lh_flags & ZLF_ENTRIES_CDSORTED ?
590 "ENTRIES_CDSORTED" : "");
591
592 if (verbose) {
593 mdb_printf(" hash table:\n");
594 for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) {
595 if (zlp->l_hash[i] != CHAIN_END)
596 mdb_printf(" %u: %u\n", i, zlp->l_hash[i]);
597 }
598 }
599
600 mdb_printf(" chunks:\n");
601 for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) {
602 /* LINTED: alignment */
603 zap_leaf_chunk_t *zlc = &ZAP_LEAF_CHUNK(&l, i);
604 switch (zlc->l_entry.le_type) {
605 case ZAP_CHUNK_FREE:
606 if (verbose) {
607 mdb_printf(" %u: free; lf_next = %u\n",
608 i, zlc->l_free.lf_next);
609 }
610 break;
611 case ZAP_CHUNK_ENTRY:
612 mdb_printf(" %u: entry\n", i);
613 if (verbose) {
614 mdb_printf(" le_next = %u\n",
615 zlc->l_entry.le_next);
616 }
617 mdb_printf(" le_name_chunk = %u\n",
618 zlc->l_entry.le_name_chunk);
619 mdb_printf(" le_name_numints = %u\n",
620 zlc->l_entry.le_name_numints);
621 mdb_printf(" le_value_chunk = %u\n",
622 zlc->l_entry.le_value_chunk);
623 mdb_printf(" le_value_intlen = %u\n",
624 zlc->l_entry.le_value_intlen);
625 mdb_printf(" le_value_numints = %u\n",
626 zlc->l_entry.le_value_numints);
627 mdb_printf(" le_cd = %u\n",
628 zlc->l_entry.le_cd);
629 mdb_printf(" le_hash = %llx\n",
630 zlc->l_entry.le_hash);
631 break;
632 case ZAP_CHUNK_ARRAY:
633 mdb_printf(" %u: array", i);
634 if (strisprint((char *)zlc->l_array.la_array))
635 mdb_printf(" \"%s\"", zlc->l_array.la_array);
636 mdb_printf("\n");
637 if (verbose) {
638 int j;
639 mdb_printf(" ");
640 for (j = 0; j < ZAP_LEAF_ARRAY_BYTES; j++) {
641 mdb_printf("%02x ",
642 zlc->l_array.la_array[j]);
643 }
644 mdb_printf("\n");
645 }
646 if (zlc->l_array.la_next != CHAIN_END) {
647 mdb_printf(" lf_next = %u\n",
648 zlc->l_array.la_next);
649 }
650 break;
651 default:
652 mdb_printf(" %u: undefined type %u\n",
653 zlc->l_entry.le_type);
654 }
655 }
656
657 return (DCMD_OK);
658 }
659
660 typedef struct dbufs_data {
661 mdb_ctf_id_t id;
662 uint64_t objset;
663 uint64_t object;
664 uint64_t level;
665 uint64_t blkid;
666 char *osname;
667 } dbufs_data_t;
668
669 #define DBUFS_UNSET (0xbaddcafedeadbeefULL)
670
671 /* ARGSUSED */
672 static int
dbufs_cb(uintptr_t addr,const void * unknown,void * arg)673 dbufs_cb(uintptr_t addr, const void *unknown, void *arg)
674 {
675 dbufs_data_t *data = arg;
676 uintptr_t objset;
677 dmu_buf_t db;
678 uint8_t level;
679 uint64_t blkid;
680 char osname[MAXNAMELEN];
681
682 if (GETMEMBID(addr, &data->id, db_objset, objset) ||
683 GETMEMBID(addr, &data->id, db, db) ||
684 GETMEMBID(addr, &data->id, db_level, level) ||
685 GETMEMBID(addr, &data->id, db_blkid, blkid)) {
686 return (WALK_ERR);
687 }
688
689 if ((data->objset == DBUFS_UNSET || data->objset == objset) &&
690 (data->osname == NULL || (objset_name(objset, osname) == 0 &&
691 strcmp(data->osname, osname) == 0)) &&
692 (data->object == DBUFS_UNSET || data->object == db.db_object) &&
693 (data->level == DBUFS_UNSET || data->level == level) &&
694 (data->blkid == DBUFS_UNSET || data->blkid == blkid)) {
695 mdb_printf("%#lr\n", addr);
696 }
697 return (WALK_NEXT);
698 }
699
700 /* ARGSUSED */
701 static int
dbufs(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)702 dbufs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
703 {
704 dbufs_data_t data;
705 char *object = NULL;
706 char *blkid = NULL;
707
708 data.objset = data.object = data.level = data.blkid = DBUFS_UNSET;
709 data.osname = NULL;
710
711 if (mdb_getopts(argc, argv,
712 'O', MDB_OPT_UINT64, &data.objset,
713 'n', MDB_OPT_STR, &data.osname,
714 'o', MDB_OPT_STR, &object,
715 'l', MDB_OPT_UINT64, &data.level,
716 'b', MDB_OPT_STR, &blkid) != argc) {
717 return (DCMD_USAGE);
718 }
719
720 if (object) {
721 if (strcmp(object, "mdn") == 0) {
722 data.object = DMU_META_DNODE_OBJECT;
723 } else {
724 data.object = mdb_strtoull(object);
725 }
726 }
727
728 if (blkid) {
729 if (strcmp(blkid, "bonus") == 0) {
730 data.blkid = DMU_BONUS_BLKID;
731 } else {
732 data.blkid = mdb_strtoull(blkid);
733 }
734 }
735
736 if (mdb_ctf_lookup_by_name("struct dmu_buf_impl", &data.id) == -1) {
737 mdb_warn("couldn't find struct dmu_buf_impl_t");
738 return (DCMD_ERR);
739 }
740
741 if (mdb_walk("dmu_buf_impl_t", dbufs_cb, &data) != 0) {
742 mdb_warn("can't walk dbufs");
743 return (DCMD_ERR);
744 }
745
746 return (DCMD_OK);
747 }
748
749 typedef struct abuf_find_data {
750 dva_t dva;
751 mdb_ctf_id_t id;
752 } abuf_find_data_t;
753
754 /* ARGSUSED */
755 static int
abuf_find_cb(uintptr_t addr,const void * unknown,void * arg)756 abuf_find_cb(uintptr_t addr, const void *unknown, void *arg)
757 {
758 abuf_find_data_t *data = arg;
759 dva_t dva;
760
761 if (GETMEMBID(addr, &data->id, b_dva, dva)) {
762 return (WALK_ERR);
763 }
764
765 if (dva.dva_word[0] == data->dva.dva_word[0] &&
766 dva.dva_word[1] == data->dva.dva_word[1]) {
767 mdb_printf("%#lr\n", addr);
768 }
769 return (WALK_NEXT);
770 }
771
772 /* ARGSUSED */
773 static int
abuf_find(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)774 abuf_find(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
775 {
776 abuf_find_data_t data;
777 GElf_Sym sym;
778 int i;
779 const char *syms[] = {
780 "ARC_mru",
781 "ARC_mru_ghost",
782 "ARC_mfu",
783 "ARC_mfu_ghost",
784 };
785
786 if (argc != 2)
787 return (DCMD_USAGE);
788
789 for (i = 0; i < 2; i ++) {
790 switch (argv[i].a_type) {
791 case MDB_TYPE_STRING:
792 data.dva.dva_word[i] = mdb_strtoull(argv[i].a_un.a_str);
793 break;
794 case MDB_TYPE_IMMEDIATE:
795 data.dva.dva_word[i] = argv[i].a_un.a_val;
796 break;
797 default:
798 return (DCMD_USAGE);
799 }
800 }
801
802 if (mdb_ctf_lookup_by_name("struct arc_buf_hdr", &data.id) == -1) {
803 mdb_warn("couldn't find struct arc_buf_hdr");
804 return (DCMD_ERR);
805 }
806
807 for (i = 0; i < sizeof (syms) / sizeof (syms[0]); i++) {
808 if (mdb_lookup_by_name(syms[i], &sym)) {
809 mdb_warn("can't find symbol %s", syms[i]);
810 return (DCMD_ERR);
811 }
812
813 if (mdb_pwalk("list", abuf_find_cb, &data, sym.st_value) != 0) {
814 mdb_warn("can't walk %s", syms[i]);
815 return (DCMD_ERR);
816 }
817 }
818
819 return (DCMD_OK);
820 }
821
822 /* ARGSUSED */
823 static int
dbgmsg_cb(uintptr_t addr,const void * unknown,void * arg)824 dbgmsg_cb(uintptr_t addr, const void *unknown, void *arg)
825 {
826 static mdb_ctf_id_t id;
827 static boolean_t gotid;
828 static ulong_t off;
829
830 int *verbosep = arg;
831 time_t timestamp;
832 char buf[1024];
833
834 if (!gotid) {
835 if (mdb_ctf_lookup_by_name("struct zfs_dbgmsg", &id) == -1) {
836 mdb_warn("couldn't find struct zfs_dbgmsg");
837 return (WALK_ERR);
838 }
839 gotid = TRUE;
840 if (mdb_ctf_offsetof(id, "zdm_msg", &off) == -1) {
841 mdb_warn("couldn't find zdm_msg");
842 return (WALK_ERR);
843 }
844 off /= 8;
845 }
846
847
848 if (GETMEMBID(addr, &id, zdm_timestamp, timestamp)) {
849 return (WALK_ERR);
850 }
851
852 if (mdb_readstr(buf, sizeof (buf), addr + off) == -1) {
853 mdb_warn("failed to read zdm_msg at %p\n", addr + off);
854 return (DCMD_ERR);
855 }
856
857 if (*verbosep)
858 mdb_printf("%Y ", timestamp);
859
860 mdb_printf("%s\n", buf);
861
862 if (*verbosep)
863 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
864
865 return (WALK_NEXT);
866 }
867
868 /* ARGSUSED */
869 static int
dbgmsg(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)870 dbgmsg(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
871 {
872 GElf_Sym sym;
873 int verbose = FALSE;
874
875 if (mdb_getopts(argc, argv,
876 'v', MDB_OPT_SETBITS, TRUE, &verbose,
877 NULL) != argc)
878 return (DCMD_USAGE);
879
880 if (mdb_lookup_by_name("zfs_dbgmsgs", &sym)) {
881 mdb_warn("can't find zfs_dbgmsgs");
882 return (DCMD_ERR);
883 }
884
885 if (mdb_pwalk("list", dbgmsg_cb, &verbose, sym.st_value) != 0) {
886 mdb_warn("can't walk zfs_dbgmsgs");
887 return (DCMD_ERR);
888 }
889
890 return (DCMD_OK);
891 }
892
893 /*ARGSUSED*/
894 static int
arc_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)895 arc_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
896 {
897 kstat_named_t *stats;
898 GElf_Sym sym;
899 int nstats, i;
900 uint_t opt_a = FALSE;
901 uint_t opt_b = FALSE;
902 uint_t shift = 0;
903 const char *suffix;
904
905 static const char *bytestats[] = {
906 "p", "c", "c_min", "c_max", "size", NULL
907 };
908
909 static const char *extras[] = {
910 "arc_no_grow", "arc_tempreserve",
911 "arc_meta_used", "arc_meta_limit", "arc_meta_max",
912 NULL
913 };
914
915 if (mdb_lookup_by_name("arc_stats", &sym) == -1) {
916 mdb_warn("failed to find 'arc_stats'");
917 return (DCMD_ERR);
918 }
919
920 stats = mdb_zalloc(sym.st_size, UM_SLEEP | UM_GC);
921
922 if (mdb_vread(stats, sym.st_size, sym.st_value) == -1) {
923 mdb_warn("couldn't read 'arc_stats' at %p", sym.st_value);
924 return (DCMD_ERR);
925 }
926
927 nstats = sym.st_size / sizeof (kstat_named_t);
928
929 /* NB: -a / opt_a are ignored for backwards compatability */
930 if (mdb_getopts(argc, argv,
931 'a', MDB_OPT_SETBITS, TRUE, &opt_a,
932 'b', MDB_OPT_SETBITS, TRUE, &opt_b,
933 'k', MDB_OPT_SETBITS, 10, &shift,
934 'm', MDB_OPT_SETBITS, 20, &shift,
935 'g', MDB_OPT_SETBITS, 30, &shift,
936 NULL) != argc)
937 return (DCMD_USAGE);
938
939 if (!opt_b && !shift)
940 shift = 20;
941
942 switch (shift) {
943 case 0:
944 suffix = "B";
945 break;
946 case 10:
947 suffix = "KB";
948 break;
949 case 20:
950 suffix = "MB";
951 break;
952 case 30:
953 suffix = "GB";
954 break;
955 default:
956 suffix = "XX";
957 }
958
959 for (i = 0; i < nstats; i++) {
960 int j;
961 boolean_t bytes = B_FALSE;
962
963 for (j = 0; bytestats[j]; j++) {
964 if (strcmp(stats[i].name, bytestats[j]) == 0) {
965 bytes = B_TRUE;
966 break;
967 }
968 }
969
970 if (bytes) {
971 mdb_printf("%-25s = %9llu %s\n", stats[i].name,
972 stats[i].value.ui64 >> shift, suffix);
973 } else {
974 mdb_printf("%-25s = %9llu\n", stats[i].name,
975 stats[i].value.ui64);
976 }
977 }
978
979 for (i = 0; extras[i]; i++) {
980 uint64_t buf;
981
982 if (mdb_lookup_by_name(extras[i], &sym) == -1) {
983 mdb_warn("failed to find '%s'", extras[i]);
984 return (DCMD_ERR);
985 }
986
987 if (sym.st_size != sizeof (uint64_t) &&
988 sym.st_size != sizeof (uint32_t)) {
989 mdb_warn("expected scalar for variable '%s'\n",
990 extras[i]);
991 return (DCMD_ERR);
992 }
993
994 if (mdb_vread(&buf, sym.st_size, sym.st_value) == -1) {
995 mdb_warn("couldn't read '%s'", extras[i]);
996 return (DCMD_ERR);
997 }
998
999 mdb_printf("%-25s = ", extras[i]);
1000
1001 /* NB: all the 64-bit extras happen to be byte counts */
1002 if (sym.st_size == sizeof (uint64_t))
1003 mdb_printf("%9llu %s\n", buf >> shift, suffix);
1004
1005 if (sym.st_size == sizeof (uint32_t))
1006 mdb_printf("%9d\n", *((uint32_t *)&buf));
1007 }
1008 return (DCMD_OK);
1009 }
1010
1011 /*
1012 * ::spa
1013 *
1014 * -c Print configuration information as well
1015 * -v Print vdev state
1016 * -e Print vdev error stats
1017 *
1018 * Print a summarized spa_t. When given no arguments, prints out a table of all
1019 * active pools on the system.
1020 */
1021 /* ARGSUSED */
1022 static int
spa_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1023 spa_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1024 {
1025 spa_t spa;
1026 const char *statetab[] = { "ACTIVE", "EXPORTED", "DESTROYED",
1027 "SPARE", "L2CACHE", "UNINIT", "UNAVAIL", "POTENTIAL" };
1028 const char *state;
1029 int config = FALSE;
1030 int vdevs = FALSE;
1031 int errors = FALSE;
1032
1033 if (mdb_getopts(argc, argv,
1034 'c', MDB_OPT_SETBITS, TRUE, &config,
1035 'v', MDB_OPT_SETBITS, TRUE, &vdevs,
1036 'e', MDB_OPT_SETBITS, TRUE, &errors,
1037 NULL) != argc)
1038 return (DCMD_USAGE);
1039
1040 if (!(flags & DCMD_ADDRSPEC)) {
1041 if (mdb_walk_dcmd("spa", "spa", argc, argv) == -1) {
1042 mdb_warn("can't walk spa");
1043 return (DCMD_ERR);
1044 }
1045
1046 return (DCMD_OK);
1047 }
1048
1049 if (flags & DCMD_PIPE_OUT) {
1050 mdb_printf("%#lr\n", addr);
1051 return (DCMD_OK);
1052 }
1053
1054 if (DCMD_HDRSPEC(flags))
1055 mdb_printf("%<u>%-?s %9s %-*s%</u>\n", "ADDR", "STATE",
1056 sizeof (uintptr_t) == 4 ? 60 : 52, "NAME");
1057
1058 if (mdb_vread(&spa, sizeof (spa), addr) == -1) {
1059 mdb_warn("failed to read spa_t at %p", addr);
1060 return (DCMD_ERR);
1061 }
1062
1063 if (spa.spa_state < 0 || spa.spa_state > POOL_STATE_UNAVAIL)
1064 state = "UNKNOWN";
1065 else
1066 state = statetab[spa.spa_state];
1067
1068 mdb_printf("%0?p %9s %s\n", addr, state, spa.spa_name);
1069
1070 if (config) {
1071 mdb_printf("\n");
1072 mdb_inc_indent(4);
1073 if (mdb_call_dcmd("spa_config", addr, flags, 0,
1074 NULL) != DCMD_OK)
1075 return (DCMD_ERR);
1076 mdb_dec_indent(4);
1077 }
1078
1079 if (vdevs || errors) {
1080 mdb_arg_t v;
1081
1082 v.a_type = MDB_TYPE_STRING;
1083 v.a_un.a_str = "-e";
1084
1085 mdb_printf("\n");
1086 mdb_inc_indent(4);
1087 if (mdb_call_dcmd("spa_vdevs", addr, flags, errors ? 1 : 0,
1088 &v) != DCMD_OK)
1089 return (DCMD_ERR);
1090 mdb_dec_indent(4);
1091 }
1092
1093 return (DCMD_OK);
1094 }
1095
1096 /*
1097 * ::spa_config
1098 *
1099 * Given a spa_t, print the configuration information stored in spa_config.
1100 * Since it's just an nvlist, format it as an indented list of name=value pairs.
1101 * We simply read the value of spa_config and pass off to ::nvlist.
1102 */
1103 /* ARGSUSED */
1104 static int
spa_print_config(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1105 spa_print_config(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1106 {
1107 spa_t spa;
1108
1109 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1110 return (DCMD_USAGE);
1111
1112 if (mdb_vread(&spa, sizeof (spa), addr) == -1) {
1113 mdb_warn("failed to read spa_t at %p", addr);
1114 return (DCMD_ERR);
1115 }
1116
1117 if (spa.spa_config == NULL) {
1118 mdb_printf("(none)\n");
1119 return (DCMD_OK);
1120 }
1121
1122 return (mdb_call_dcmd("nvlist", (uintptr_t)spa.spa_config, flags,
1123 0, NULL));
1124 }
1125
1126 /*
1127 * ::vdev
1128 *
1129 * Print out a summarized vdev_t, in the following form:
1130 *
1131 * ADDR STATE AUX DESC
1132 * fffffffbcde23df0 HEALTHY - /dev/dsk/c0t0d0
1133 *
1134 * If '-r' is specified, recursively visit all children.
1135 *
1136 * With '-e', the statistics associated with the vdev are printed as well.
1137 */
1138 static int
do_print_vdev(uintptr_t addr,int flags,int depth,int stats,int recursive)1139 do_print_vdev(uintptr_t addr, int flags, int depth, int stats,
1140 int recursive)
1141 {
1142 vdev_t vdev;
1143 char desc[MAXNAMELEN];
1144 int c, children;
1145 uintptr_t *child;
1146 const char *state, *aux;
1147
1148 if (mdb_vread(&vdev, sizeof (vdev), (uintptr_t)addr) == -1) {
1149 mdb_warn("failed to read vdev_t at %p\n", (uintptr_t)addr);
1150 return (DCMD_ERR);
1151 }
1152
1153 if (flags & DCMD_PIPE_OUT) {
1154 mdb_printf("%#lr", addr);
1155 } else {
1156 if (vdev.vdev_path != NULL) {
1157 if (mdb_readstr(desc, sizeof (desc),
1158 (uintptr_t)vdev.vdev_path) == -1) {
1159 mdb_warn("failed to read vdev_path at %p\n",
1160 vdev.vdev_path);
1161 return (DCMD_ERR);
1162 }
1163 } else if (vdev.vdev_ops != NULL) {
1164 vdev_ops_t ops;
1165 if (mdb_vread(&ops, sizeof (ops),
1166 (uintptr_t)vdev.vdev_ops) == -1) {
1167 mdb_warn("failed to read vdev_ops at %p\n",
1168 vdev.vdev_ops);
1169 return (DCMD_ERR);
1170 }
1171 (void) strcpy(desc, ops.vdev_op_type);
1172 } else {
1173 (void) strcpy(desc, "<unknown>");
1174 }
1175
1176 if (depth == 0 && DCMD_HDRSPEC(flags))
1177 mdb_printf("%<u>%-?s %-9s %-12s %-*s%</u>\n",
1178 "ADDR", "STATE", "AUX",
1179 sizeof (uintptr_t) == 4 ? 43 : 35,
1180 "DESCRIPTION");
1181
1182 mdb_printf("%0?p ", addr);
1183
1184 switch (vdev.vdev_state) {
1185 case VDEV_STATE_CLOSED:
1186 state = "CLOSED";
1187 break;
1188 case VDEV_STATE_OFFLINE:
1189 state = "OFFLINE";
1190 break;
1191 case VDEV_STATE_CANT_OPEN:
1192 state = "CANT_OPEN";
1193 break;
1194 case VDEV_STATE_DEGRADED:
1195 state = "DEGRADED";
1196 break;
1197 case VDEV_STATE_HEALTHY:
1198 state = "HEALTHY";
1199 break;
1200 case VDEV_STATE_REMOVED:
1201 state = "REMOVED";
1202 break;
1203 case VDEV_STATE_FAULTED:
1204 state = "FAULTED";
1205 break;
1206 default:
1207 state = "UNKNOWN";
1208 break;
1209 }
1210
1211 switch (vdev.vdev_stat.vs_aux) {
1212 case VDEV_AUX_NONE:
1213 aux = "-";
1214 break;
1215 case VDEV_AUX_OPEN_FAILED:
1216 aux = "OPEN_FAILED";
1217 break;
1218 case VDEV_AUX_CORRUPT_DATA:
1219 aux = "CORRUPT_DATA";
1220 break;
1221 case VDEV_AUX_NO_REPLICAS:
1222 aux = "NO_REPLICAS";
1223 break;
1224 case VDEV_AUX_BAD_GUID_SUM:
1225 aux = "BAD_GUID_SUM";
1226 break;
1227 case VDEV_AUX_TOO_SMALL:
1228 aux = "TOO_SMALL";
1229 break;
1230 case VDEV_AUX_BAD_LABEL:
1231 aux = "BAD_LABEL";
1232 break;
1233 case VDEV_AUX_VERSION_NEWER:
1234 aux = "VERS_NEWER";
1235 break;
1236 case VDEV_AUX_VERSION_OLDER:
1237 aux = "VERS_OLDER";
1238 break;
1239 case VDEV_AUX_SPARED:
1240 aux = "SPARED";
1241 break;
1242 case VDEV_AUX_ERR_EXCEEDED:
1243 aux = "ERR_EXCEEDED";
1244 break;
1245 case VDEV_AUX_IO_FAILURE:
1246 aux = "IO_FAILURE";
1247 break;
1248 case VDEV_AUX_BAD_LOG:
1249 aux = "BAD_LOG";
1250 break;
1251 case VDEV_AUX_EXTERNAL:
1252 aux = "EXTERNAL";
1253 break;
1254 case VDEV_AUX_SPLIT_POOL:
1255 aux = "SPLIT_POOL";
1256 break;
1257 default:
1258 aux = "UNKNOWN";
1259 break;
1260 }
1261
1262 mdb_printf("%-9s %-12s %*s%s\n", state, aux, depth, "", desc);
1263
1264 if (stats) {
1265 vdev_stat_t *vs = &vdev.vdev_stat;
1266 int i;
1267
1268 mdb_inc_indent(4);
1269 mdb_printf("\n");
1270 mdb_printf("%<u> %12s %12s %12s %12s "
1271 "%12s%</u>\n", "READ", "WRITE", "FREE", "CLAIM",
1272 "IOCTL");
1273 mdb_printf("OPS ");
1274 for (i = 1; i < ZIO_TYPES; i++)
1275 mdb_printf("%11#llx%s", vs->vs_ops[i],
1276 i == ZIO_TYPES - 1 ? "" : " ");
1277 mdb_printf("\n");
1278 mdb_printf("BYTES ");
1279 for (i = 1; i < ZIO_TYPES; i++)
1280 mdb_printf("%11#llx%s", vs->vs_bytes[i],
1281 i == ZIO_TYPES - 1 ? "" : " ");
1282
1283
1284 mdb_printf("\n");
1285 mdb_printf("EREAD %10#llx\n", vs->vs_read_errors);
1286 mdb_printf("EWRITE %10#llx\n", vs->vs_write_errors);
1287 mdb_printf("ECKSUM %10#llx\n",
1288 vs->vs_checksum_errors);
1289 mdb_dec_indent(4);
1290 }
1291
1292 if (stats)
1293 mdb_printf("\n");
1294 }
1295
1296 children = vdev.vdev_children;
1297
1298 if (children == 0 || !recursive)
1299 return (DCMD_OK);
1300
1301 child = mdb_alloc(children * sizeof (void *), UM_SLEEP | UM_GC);
1302 if (mdb_vread(child, children * sizeof (void *),
1303 (uintptr_t)vdev.vdev_child) == -1) {
1304 mdb_warn("failed to read vdev children at %p", vdev.vdev_child);
1305 return (DCMD_ERR);
1306 }
1307
1308 for (c = 0; c < children; c++) {
1309 if (do_print_vdev(child[c], flags, depth + 2, stats,
1310 recursive))
1311 return (DCMD_ERR);
1312 }
1313
1314 return (DCMD_OK);
1315 }
1316
1317 static int
vdev_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1318 vdev_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1319 {
1320 int recursive = FALSE;
1321 int stats = FALSE;
1322 uint64_t depth = 0;
1323
1324 if (mdb_getopts(argc, argv,
1325 'r', MDB_OPT_SETBITS, TRUE, &recursive,
1326 'e', MDB_OPT_SETBITS, TRUE, &stats,
1327 'd', MDB_OPT_UINT64, &depth,
1328 NULL) != argc)
1329 return (DCMD_USAGE);
1330
1331 if (!(flags & DCMD_ADDRSPEC)) {
1332 mdb_warn("no vdev_t address given\n");
1333 return (DCMD_ERR);
1334 }
1335
1336 return (do_print_vdev(addr, flags, (int)depth, stats, recursive));
1337 }
1338
1339 typedef struct metaslab_walk_data {
1340 uint64_t mw_numvdevs;
1341 uintptr_t *mw_vdevs;
1342 int mw_curvdev;
1343 uint64_t mw_nummss;
1344 uintptr_t *mw_mss;
1345 int mw_curms;
1346 } metaslab_walk_data_t;
1347
1348 static int
metaslab_walk_step(mdb_walk_state_t * wsp)1349 metaslab_walk_step(mdb_walk_state_t *wsp)
1350 {
1351 metaslab_walk_data_t *mw = wsp->walk_data;
1352 metaslab_t ms;
1353 uintptr_t msp;
1354
1355 if (mw->mw_curvdev >= mw->mw_numvdevs)
1356 return (WALK_DONE);
1357
1358 if (mw->mw_mss == NULL) {
1359 uintptr_t mssp;
1360 uintptr_t vdevp;
1361
1362 ASSERT(mw->mw_curms == 0);
1363 ASSERT(mw->mw_nummss == 0);
1364
1365 vdevp = mw->mw_vdevs[mw->mw_curvdev];
1366 if (GETMEMB(vdevp, struct vdev, vdev_ms, mssp) ||
1367 GETMEMB(vdevp, struct vdev, vdev_ms_count, mw->mw_nummss)) {
1368 return (WALK_ERR);
1369 }
1370
1371 mw->mw_mss = mdb_alloc(mw->mw_nummss * sizeof (void*),
1372 UM_SLEEP | UM_GC);
1373 if (mdb_vread(mw->mw_mss, mw->mw_nummss * sizeof (void*),
1374 mssp) == -1) {
1375 mdb_warn("failed to read vdev_ms at %p", mssp);
1376 return (WALK_ERR);
1377 }
1378 }
1379
1380 if (mw->mw_curms >= mw->mw_nummss) {
1381 mw->mw_mss = NULL;
1382 mw->mw_curms = 0;
1383 mw->mw_nummss = 0;
1384 mw->mw_curvdev++;
1385 return (WALK_NEXT);
1386 }
1387
1388 msp = mw->mw_mss[mw->mw_curms];
1389 if (mdb_vread(&ms, sizeof (metaslab_t), msp) == -1) {
1390 mdb_warn("failed to read metaslab_t at %p", msp);
1391 return (WALK_ERR);
1392 }
1393
1394 mw->mw_curms++;
1395
1396 return (wsp->walk_callback(msp, &ms, wsp->walk_cbdata));
1397 }
1398
1399 /* ARGSUSED */
1400 static int
metaslab_walk_init(mdb_walk_state_t * wsp)1401 metaslab_walk_init(mdb_walk_state_t *wsp)
1402 {
1403 metaslab_walk_data_t *mw;
1404 uintptr_t root_vdevp;
1405 uintptr_t childp;
1406
1407 if (wsp->walk_addr == NULL) {
1408 mdb_warn("must supply address of spa_t\n");
1409 return (WALK_ERR);
1410 }
1411
1412 mw = mdb_zalloc(sizeof (metaslab_walk_data_t), UM_SLEEP | UM_GC);
1413
1414 if (GETMEMB(wsp->walk_addr, struct spa, spa_root_vdev, root_vdevp) ||
1415 GETMEMB(root_vdevp, struct vdev, vdev_children, mw->mw_numvdevs) ||
1416 GETMEMB(root_vdevp, struct vdev, vdev_child, childp)) {
1417 return (DCMD_ERR);
1418 }
1419
1420 mw->mw_vdevs = mdb_alloc(mw->mw_numvdevs * sizeof (void *),
1421 UM_SLEEP | UM_GC);
1422 if (mdb_vread(mw->mw_vdevs, mw->mw_numvdevs * sizeof (void *),
1423 childp) == -1) {
1424 mdb_warn("failed to read root vdev children at %p", childp);
1425 return (DCMD_ERR);
1426 }
1427
1428 wsp->walk_data = mw;
1429
1430 return (WALK_NEXT);
1431 }
1432
1433 typedef struct mdb_spa {
1434 uintptr_t spa_dsl_pool;
1435 uintptr_t spa_root_vdev;
1436 } mdb_spa_t;
1437
1438 typedef struct mdb_dsl_dir {
1439 uintptr_t dd_phys;
1440 int64_t dd_space_towrite[TXG_SIZE];
1441 } mdb_dsl_dir_t;
1442
1443 typedef struct mdb_dsl_dir_phys {
1444 uint64_t dd_used_bytes;
1445 uint64_t dd_compressed_bytes;
1446 uint64_t dd_uncompressed_bytes;
1447 } mdb_dsl_dir_phys_t;
1448
1449 typedef struct mdb_vdev {
1450 uintptr_t vdev_parent;
1451 uintptr_t vdev_ms;
1452 uint64_t vdev_ms_count;
1453 vdev_stat_t vdev_stat;
1454 } mdb_vdev_t;
1455
1456 typedef struct mdb_metaslab {
1457 space_map_t ms_allocmap[TXG_SIZE];
1458 space_map_t ms_freemap[TXG_SIZE];
1459 space_map_t ms_map;
1460 space_map_obj_t ms_smo;
1461 space_map_obj_t ms_smo_syncing;
1462 } mdb_metaslab_t;
1463
1464 typedef struct space_data {
1465 uint64_t ms_allocmap[TXG_SIZE];
1466 uint64_t ms_freemap[TXG_SIZE];
1467 uint64_t ms_map;
1468 uint64_t avail;
1469 uint64_t nowavail;
1470 } space_data_t;
1471
1472 /* ARGSUSED */
1473 static int
space_cb(uintptr_t addr,const void * unknown,void * arg)1474 space_cb(uintptr_t addr, const void *unknown, void *arg)
1475 {
1476 space_data_t *sd = arg;
1477 mdb_metaslab_t ms;
1478
1479 if (GETMEMB(addr, struct metaslab, ms_allocmap, ms.ms_allocmap) ||
1480 GETMEMB(addr, struct metaslab, ms_freemap, ms.ms_freemap) ||
1481 GETMEMB(addr, struct metaslab, ms_map, ms.ms_map) ||
1482 GETMEMB(addr, struct metaslab, ms_smo, ms.ms_smo) ||
1483 GETMEMB(addr, struct metaslab, ms_smo_syncing, ms.ms_smo_syncing)) {
1484 return (WALK_ERR);
1485 }
1486
1487 sd->ms_allocmap[0] += ms.ms_allocmap[0].sm_space;
1488 sd->ms_allocmap[1] += ms.ms_allocmap[1].sm_space;
1489 sd->ms_allocmap[2] += ms.ms_allocmap[2].sm_space;
1490 sd->ms_allocmap[3] += ms.ms_allocmap[3].sm_space;
1491 sd->ms_freemap[0] += ms.ms_freemap[0].sm_space;
1492 sd->ms_freemap[1] += ms.ms_freemap[1].sm_space;
1493 sd->ms_freemap[2] += ms.ms_freemap[2].sm_space;
1494 sd->ms_freemap[3] += ms.ms_freemap[3].sm_space;
1495 sd->ms_map += ms.ms_map.sm_space;
1496 sd->avail += ms.ms_map.sm_size - ms.ms_smo.smo_alloc;
1497 sd->nowavail += ms.ms_map.sm_size - ms.ms_smo_syncing.smo_alloc;
1498
1499 return (WALK_NEXT);
1500 }
1501
1502 /*
1503 * ::spa_space [-b]
1504 *
1505 * Given a spa_t, print out it's on-disk space usage and in-core
1506 * estimates of future usage. If -b is given, print space in bytes.
1507 * Otherwise print in megabytes.
1508 */
1509 /* ARGSUSED */
1510 static int
spa_space(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1511 spa_space(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1512 {
1513 mdb_spa_t spa;
1514 uintptr_t dp_root_dir;
1515 mdb_dsl_dir_t dd;
1516 mdb_dsl_dir_phys_t dsp;
1517 uint64_t children;
1518 uintptr_t childaddr;
1519 space_data_t sd;
1520 int shift = 20;
1521 char *suffix = "M";
1522 int bits = FALSE;
1523
1524 if (mdb_getopts(argc, argv, 'b', MDB_OPT_SETBITS, TRUE, &bits, NULL) !=
1525 argc)
1526 return (DCMD_USAGE);
1527 if (!(flags & DCMD_ADDRSPEC))
1528 return (DCMD_USAGE);
1529
1530 if (bits) {
1531 shift = 0;
1532 suffix = "";
1533 }
1534
1535 if (GETMEMB(addr, struct spa, spa_dsl_pool, spa.spa_dsl_pool) ||
1536 GETMEMB(addr, struct spa, spa_root_vdev, spa.spa_root_vdev) ||
1537 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_children, children) ||
1538 GETMEMB(spa.spa_root_vdev, struct vdev, vdev_child, childaddr) ||
1539 GETMEMB(spa.spa_dsl_pool, struct dsl_pool,
1540 dp_root_dir, dp_root_dir) ||
1541 GETMEMB(dp_root_dir, struct dsl_dir, dd_phys, dd.dd_phys) ||
1542 GETMEMB(dp_root_dir, struct dsl_dir,
1543 dd_space_towrite, dd.dd_space_towrite) ||
1544 GETMEMB(dd.dd_phys, struct dsl_dir_phys,
1545 dd_used_bytes, dsp.dd_used_bytes) ||
1546 GETMEMB(dd.dd_phys, struct dsl_dir_phys,
1547 dd_compressed_bytes, dsp.dd_compressed_bytes) ||
1548 GETMEMB(dd.dd_phys, struct dsl_dir_phys,
1549 dd_uncompressed_bytes, dsp.dd_uncompressed_bytes)) {
1550 return (DCMD_ERR);
1551 }
1552
1553 mdb_printf("dd_space_towrite = %llu%s %llu%s %llu%s %llu%s\n",
1554 dd.dd_space_towrite[0] >> shift, suffix,
1555 dd.dd_space_towrite[1] >> shift, suffix,
1556 dd.dd_space_towrite[2] >> shift, suffix,
1557 dd.dd_space_towrite[3] >> shift, suffix);
1558
1559 mdb_printf("dd_phys.dd_used_bytes = %llu%s\n",
1560 dsp.dd_used_bytes >> shift, suffix);
1561 mdb_printf("dd_phys.dd_compressed_bytes = %llu%s\n",
1562 dsp.dd_compressed_bytes >> shift, suffix);
1563 mdb_printf("dd_phys.dd_uncompressed_bytes = %llu%s\n",
1564 dsp.dd_uncompressed_bytes >> shift, suffix);
1565
1566 bzero(&sd, sizeof (sd));
1567 if (mdb_pwalk("metaslab", space_cb, &sd, addr) != 0) {
1568 mdb_warn("can't walk metaslabs");
1569 return (DCMD_ERR);
1570 }
1571
1572 mdb_printf("ms_allocmap = %llu%s %llu%s %llu%s %llu%s\n",
1573 sd.ms_allocmap[0] >> shift, suffix,
1574 sd.ms_allocmap[1] >> shift, suffix,
1575 sd.ms_allocmap[2] >> shift, suffix,
1576 sd.ms_allocmap[3] >> shift, suffix);
1577 mdb_printf("ms_freemap = %llu%s %llu%s %llu%s %llu%s\n",
1578 sd.ms_freemap[0] >> shift, suffix,
1579 sd.ms_freemap[1] >> shift, suffix,
1580 sd.ms_freemap[2] >> shift, suffix,
1581 sd.ms_freemap[3] >> shift, suffix);
1582 mdb_printf("ms_map = %llu%s\n", sd.ms_map >> shift, suffix);
1583 mdb_printf("last synced avail = %llu%s\n", sd.avail >> shift, suffix);
1584 mdb_printf("current syncing avail = %llu%s\n",
1585 sd.nowavail >> shift, suffix);
1586
1587 return (DCMD_OK);
1588 }
1589
1590 /*
1591 * ::spa_verify
1592 *
1593 * Given a spa_t, verify that that the pool is self-consistent.
1594 * Currently, it only checks to make sure that the vdev tree exists.
1595 */
1596 /* ARGSUSED */
1597 static int
spa_verify(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1598 spa_verify(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1599 {
1600 spa_t spa;
1601
1602 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
1603 return (DCMD_USAGE);
1604
1605 if (mdb_vread(&spa, sizeof (spa), addr) == -1) {
1606 mdb_warn("failed to read spa_t at %p", addr);
1607 return (DCMD_ERR);
1608 }
1609
1610 if (spa.spa_root_vdev == NULL) {
1611 mdb_printf("no vdev tree present\n");
1612 return (DCMD_OK);
1613 }
1614
1615 return (DCMD_OK);
1616 }
1617
1618 static int
spa_print_aux(spa_aux_vdev_t * sav,uint_t flags,mdb_arg_t * v,const char * name)1619 spa_print_aux(spa_aux_vdev_t *sav, uint_t flags, mdb_arg_t *v,
1620 const char *name)
1621 {
1622 uintptr_t *aux;
1623 size_t len;
1624 int ret, i;
1625
1626 /*
1627 * Iterate over aux vdevs and print those out as well. This is a
1628 * little annoying because we don't have a root vdev to pass to ::vdev.
1629 * Instead, we print a single line and then call it for each child
1630 * vdev.
1631 */
1632 if (sav->sav_count != 0) {
1633 v[1].a_type = MDB_TYPE_STRING;
1634 v[1].a_un.a_str = "-d";
1635 v[2].a_type = MDB_TYPE_IMMEDIATE;
1636 v[2].a_un.a_val = 2;
1637
1638 len = sav->sav_count * sizeof (uintptr_t);
1639 aux = mdb_alloc(len, UM_SLEEP);
1640 if (mdb_vread(aux, len,
1641 (uintptr_t)sav->sav_vdevs) == -1) {
1642 mdb_free(aux, len);
1643 mdb_warn("failed to read l2cache vdevs at %p",
1644 sav->sav_vdevs);
1645 return (DCMD_ERR);
1646 }
1647
1648 mdb_printf("%-?s %-9s %-12s %s\n", "-", "-", "-", name);
1649
1650 for (i = 0; i < sav->sav_count; i++) {
1651 ret = mdb_call_dcmd("vdev", aux[i], flags, 3, v);
1652 if (ret != DCMD_OK) {
1653 mdb_free(aux, len);
1654 return (ret);
1655 }
1656 }
1657
1658 mdb_free(aux, len);
1659 }
1660
1661 return (0);
1662 }
1663
1664 /*
1665 * ::spa_vdevs
1666 *
1667 * -e Include error stats
1668 *
1669 * Print out a summarized list of vdevs for the given spa_t.
1670 * This is accomplished by invoking "::vdev -re" on the root vdev, as well as
1671 * iterating over the cache devices.
1672 */
1673 /* ARGSUSED */
1674 static int
spa_vdevs(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1675 spa_vdevs(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1676 {
1677 spa_t spa;
1678 mdb_arg_t v[3];
1679 int errors = FALSE;
1680 int ret;
1681
1682 if (mdb_getopts(argc, argv,
1683 'e', MDB_OPT_SETBITS, TRUE, &errors,
1684 NULL) != argc)
1685 return (DCMD_USAGE);
1686
1687 if (!(flags & DCMD_ADDRSPEC))
1688 return (DCMD_USAGE);
1689
1690 if (mdb_vread(&spa, sizeof (spa), addr) == -1) {
1691 mdb_warn("failed to read spa_t at %p", addr);
1692 return (DCMD_ERR);
1693 }
1694
1695 /*
1696 * Unitialized spa_t structures can have a NULL root vdev.
1697 */
1698 if (spa.spa_root_vdev == NULL) {
1699 mdb_printf("no associated vdevs\n");
1700 return (DCMD_OK);
1701 }
1702
1703 v[0].a_type = MDB_TYPE_STRING;
1704 v[0].a_un.a_str = errors ? "-re" : "-r";
1705
1706 ret = mdb_call_dcmd("vdev", (uintptr_t)spa.spa_root_vdev,
1707 flags, 1, v);
1708 if (ret != DCMD_OK)
1709 return (ret);
1710
1711 if (spa_print_aux(&spa.spa_l2cache, flags, v, "cache") != 0 ||
1712 spa_print_aux(&spa.spa_spares, flags, v, "spares") != 0)
1713 return (DCMD_ERR);
1714
1715 return (DCMD_OK);
1716 }
1717
1718 /*
1719 * ::zio
1720 *
1721 * Print a summary of zio_t and all its children. This is intended to display a
1722 * zio tree, and hence we only pick the most important pieces of information for
1723 * the main summary. More detailed information can always be found by doing a
1724 * '::print zio' on the underlying zio_t. The columns we display are:
1725 *
1726 * ADDRESS TYPE STAGE WAITER
1727 *
1728 * The 'address' column is indented by one space for each depth level as we
1729 * descend down the tree.
1730 */
1731
1732 #define ZIO_MAXINDENT 24
1733 #define ZIO_MAXWIDTH (sizeof (uintptr_t) * 2 + ZIO_MAXINDENT)
1734 #define ZIO_WALK_SELF 0
1735 #define ZIO_WALK_CHILD 1
1736 #define ZIO_WALK_PARENT 2
1737
1738 typedef struct zio_print_args {
1739 int zpa_current_depth;
1740 int zpa_min_depth;
1741 int zpa_max_depth;
1742 int zpa_type;
1743 uint_t zpa_flags;
1744 } zio_print_args_t;
1745
1746 static int zio_child_cb(uintptr_t addr, const void *unknown, void *arg);
1747
1748 static int
zio_print_cb(uintptr_t addr,const void * data,void * priv)1749 zio_print_cb(uintptr_t addr, const void *data, void *priv)
1750 {
1751 const zio_t *zio = data;
1752 zio_print_args_t *zpa = priv;
1753 mdb_ctf_id_t type_enum, stage_enum;
1754 int indent = zpa->zpa_current_depth;
1755 const char *type, *stage;
1756 uintptr_t laddr;
1757
1758 if (indent > ZIO_MAXINDENT)
1759 indent = ZIO_MAXINDENT;
1760
1761 if (mdb_ctf_lookup_by_name("enum zio_type", &type_enum) == -1 ||
1762 mdb_ctf_lookup_by_name("enum zio_stage", &stage_enum) == -1) {
1763 mdb_warn("failed to lookup zio enums");
1764 return (WALK_ERR);
1765 }
1766
1767 if ((type = mdb_ctf_enum_name(type_enum, zio->io_type)) != NULL)
1768 type += sizeof ("ZIO_TYPE_") - 1;
1769 else
1770 type = "?";
1771
1772 if ((stage = mdb_ctf_enum_name(stage_enum, zio->io_stage)) != NULL)
1773 stage += sizeof ("ZIO_STAGE_") - 1;
1774 else
1775 stage = "?";
1776
1777 if (zpa->zpa_current_depth >= zpa->zpa_min_depth) {
1778 if (zpa->zpa_flags & DCMD_PIPE_OUT) {
1779 mdb_printf("%?p\n", addr);
1780 } else {
1781 mdb_printf("%*s%-*p %-5s %-16s ", indent, "",
1782 ZIO_MAXWIDTH - indent, addr, type, stage);
1783 if (zio->io_waiter)
1784 mdb_printf("%?p\n", zio->io_waiter);
1785 else
1786 mdb_printf("-\n");
1787 }
1788 }
1789
1790 if (zpa->zpa_current_depth >= zpa->zpa_max_depth)
1791 return (WALK_NEXT);
1792
1793 if (zpa->zpa_type == ZIO_WALK_PARENT)
1794 laddr = addr + OFFSETOF(zio_t, io_parent_list);
1795 else
1796 laddr = addr + OFFSETOF(zio_t, io_child_list);
1797
1798 zpa->zpa_current_depth++;
1799 if (mdb_pwalk("list", zio_child_cb, zpa, laddr) != 0) {
1800 mdb_warn("failed to walk zio_t children at %p\n", laddr);
1801 return (WALK_ERR);
1802 }
1803 zpa->zpa_current_depth--;
1804
1805 return (WALK_NEXT);
1806 }
1807
1808 /* ARGSUSED */
1809 static int
zio_child_cb(uintptr_t addr,const void * unknown,void * arg)1810 zio_child_cb(uintptr_t addr, const void *unknown, void *arg)
1811 {
1812 zio_link_t zl;
1813 zio_t zio;
1814 uintptr_t ziop;
1815 zio_print_args_t *zpa = arg;
1816
1817 if (mdb_vread(&zl, sizeof (zl), addr) == -1) {
1818 mdb_warn("failed to read zio_link_t at %p", addr);
1819 return (WALK_ERR);
1820 }
1821
1822 if (zpa->zpa_type == ZIO_WALK_PARENT)
1823 ziop = (uintptr_t)zl.zl_parent;
1824 else
1825 ziop = (uintptr_t)zl.zl_child;
1826
1827 if (mdb_vread(&zio, sizeof (zio_t), ziop) == -1) {
1828 mdb_warn("failed to read zio_t at %p", ziop);
1829 return (WALK_ERR);
1830 }
1831
1832 return (zio_print_cb(ziop, &zio, arg));
1833 }
1834
1835 /* ARGSUSED */
1836 static int
zio_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1837 zio_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1838 {
1839 zio_t zio;
1840 zio_print_args_t zpa = { 0 };
1841
1842 if (!(flags & DCMD_ADDRSPEC))
1843 return (DCMD_USAGE);
1844
1845 if (mdb_getopts(argc, argv,
1846 'r', MDB_OPT_SETBITS, INT_MAX, &zpa.zpa_max_depth,
1847 'c', MDB_OPT_SETBITS, ZIO_WALK_CHILD, &zpa.zpa_type,
1848 'p', MDB_OPT_SETBITS, ZIO_WALK_PARENT, &zpa.zpa_type,
1849 NULL) != argc)
1850 return (DCMD_USAGE);
1851
1852 zpa.zpa_flags = flags;
1853 if (zpa.zpa_max_depth != 0) {
1854 if (zpa.zpa_type == ZIO_WALK_SELF)
1855 zpa.zpa_type = ZIO_WALK_CHILD;
1856 } else if (zpa.zpa_type != ZIO_WALK_SELF) {
1857 zpa.zpa_min_depth = 1;
1858 zpa.zpa_max_depth = 1;
1859 }
1860
1861 if (mdb_vread(&zio, sizeof (zio_t), addr) == -1) {
1862 mdb_warn("failed to read zio_t at %p", addr);
1863 return (DCMD_ERR);
1864 }
1865
1866 if (!(flags & DCMD_PIPE_OUT) && DCMD_HDRSPEC(flags))
1867 mdb_printf("%<u>%-*s %-5s %-16s %-?s%</u>\n", ZIO_MAXWIDTH,
1868 "ADDRESS", "TYPE", "STAGE", "WAITER");
1869
1870 if (zio_print_cb(addr, &zio, &zpa) != WALK_NEXT)
1871 return (DCMD_ERR);
1872
1873 return (DCMD_OK);
1874 }
1875
1876 /*
1877 * [addr]::zio_state
1878 *
1879 * Print a summary of all zio_t structures on the system, or for a particular
1880 * pool. This is equivalent to '::walk zio_root | ::zio'.
1881 */
1882 /*ARGSUSED*/
1883 static int
zio_state(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)1884 zio_state(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
1885 {
1886 /*
1887 * MDB will remember the last address of the pipeline, so if we don't
1888 * zero this we'll end up trying to walk zio structures for a
1889 * non-existent spa_t.
1890 */
1891 if (!(flags & DCMD_ADDRSPEC))
1892 addr = 0;
1893
1894 return (mdb_pwalk_dcmd("zio_root", "zio", argc, argv, addr));
1895 }
1896
1897 typedef struct txg_list_walk_data {
1898 uintptr_t lw_head[TXG_SIZE];
1899 int lw_txgoff;
1900 int lw_maxoff;
1901 size_t lw_offset;
1902 void *lw_obj;
1903 } txg_list_walk_data_t;
1904
1905 static int
txg_list_walk_init_common(mdb_walk_state_t * wsp,int txg,int maxoff)1906 txg_list_walk_init_common(mdb_walk_state_t *wsp, int txg, int maxoff)
1907 {
1908 txg_list_walk_data_t *lwd;
1909 txg_list_t list;
1910 int i;
1911
1912 lwd = mdb_alloc(sizeof (txg_list_walk_data_t), UM_SLEEP | UM_GC);
1913 if (mdb_vread(&list, sizeof (txg_list_t), wsp->walk_addr) == -1) {
1914 mdb_warn("failed to read txg_list_t at %#lx", wsp->walk_addr);
1915 return (WALK_ERR);
1916 }
1917
1918 for (i = 0; i < TXG_SIZE; i++)
1919 lwd->lw_head[i] = (uintptr_t)list.tl_head[i];
1920 lwd->lw_offset = list.tl_offset;
1921 lwd->lw_obj = mdb_alloc(lwd->lw_offset + sizeof (txg_node_t),
1922 UM_SLEEP | UM_GC);
1923 lwd->lw_txgoff = txg;
1924 lwd->lw_maxoff = maxoff;
1925
1926 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
1927 wsp->walk_data = lwd;
1928
1929 return (WALK_NEXT);
1930 }
1931
1932 static int
txg_list_walk_init(mdb_walk_state_t * wsp)1933 txg_list_walk_init(mdb_walk_state_t *wsp)
1934 {
1935 return (txg_list_walk_init_common(wsp, 0, TXG_SIZE-1));
1936 }
1937
1938 static int
txg_list0_walk_init(mdb_walk_state_t * wsp)1939 txg_list0_walk_init(mdb_walk_state_t *wsp)
1940 {
1941 return (txg_list_walk_init_common(wsp, 0, 0));
1942 }
1943
1944 static int
txg_list1_walk_init(mdb_walk_state_t * wsp)1945 txg_list1_walk_init(mdb_walk_state_t *wsp)
1946 {
1947 return (txg_list_walk_init_common(wsp, 1, 1));
1948 }
1949
1950 static int
txg_list2_walk_init(mdb_walk_state_t * wsp)1951 txg_list2_walk_init(mdb_walk_state_t *wsp)
1952 {
1953 return (txg_list_walk_init_common(wsp, 2, 2));
1954 }
1955
1956 static int
txg_list3_walk_init(mdb_walk_state_t * wsp)1957 txg_list3_walk_init(mdb_walk_state_t *wsp)
1958 {
1959 return (txg_list_walk_init_common(wsp, 3, 3));
1960 }
1961
1962 static int
txg_list_walk_step(mdb_walk_state_t * wsp)1963 txg_list_walk_step(mdb_walk_state_t *wsp)
1964 {
1965 txg_list_walk_data_t *lwd = wsp->walk_data;
1966 uintptr_t addr;
1967 txg_node_t *node;
1968 int status;
1969
1970 while (wsp->walk_addr == NULL && lwd->lw_txgoff < lwd->lw_maxoff) {
1971 lwd->lw_txgoff++;
1972 wsp->walk_addr = lwd->lw_head[lwd->lw_txgoff];
1973 }
1974
1975 if (wsp->walk_addr == NULL)
1976 return (WALK_DONE);
1977
1978 addr = wsp->walk_addr - lwd->lw_offset;
1979
1980 if (mdb_vread(lwd->lw_obj,
1981 lwd->lw_offset + sizeof (txg_node_t), addr) == -1) {
1982 mdb_warn("failed to read list element at %#lx", addr);
1983 return (WALK_ERR);
1984 }
1985
1986 status = wsp->walk_callback(addr, lwd->lw_obj, wsp->walk_cbdata);
1987 node = (txg_node_t *)((uintptr_t)lwd->lw_obj + lwd->lw_offset);
1988 wsp->walk_addr = (uintptr_t)node->tn_next[lwd->lw_txgoff];
1989
1990 return (status);
1991 }
1992
1993 /*
1994 * ::walk spa
1995 *
1996 * Walk all named spa_t structures in the namespace. This is nothing more than
1997 * a layered avl walk.
1998 */
1999 static int
spa_walk_init(mdb_walk_state_t * wsp)2000 spa_walk_init(mdb_walk_state_t *wsp)
2001 {
2002 GElf_Sym sym;
2003
2004 if (wsp->walk_addr != NULL) {
2005 mdb_warn("spa walk only supports global walks\n");
2006 return (WALK_ERR);
2007 }
2008
2009 if (mdb_lookup_by_obj(ZFS_OBJ_NAME, "spa_namespace_avl", &sym) == -1) {
2010 mdb_warn("failed to find symbol 'spa_namespace_avl'");
2011 return (WALK_ERR);
2012 }
2013
2014 wsp->walk_addr = (uintptr_t)sym.st_value;
2015
2016 if (mdb_layered_walk("avl", wsp) == -1) {
2017 mdb_warn("failed to walk 'avl'\n");
2018 return (WALK_ERR);
2019 }
2020
2021 return (WALK_NEXT);
2022 }
2023
2024 static int
spa_walk_step(mdb_walk_state_t * wsp)2025 spa_walk_step(mdb_walk_state_t *wsp)
2026 {
2027 spa_t spa;
2028
2029 if (mdb_vread(&spa, sizeof (spa), wsp->walk_addr) == -1) {
2030 mdb_warn("failed to read spa_t at %p", wsp->walk_addr);
2031 return (WALK_ERR);
2032 }
2033
2034 return (wsp->walk_callback(wsp->walk_addr, &spa, wsp->walk_cbdata));
2035 }
2036
2037 /*
2038 * [addr]::walk zio
2039 *
2040 * Walk all active zio_t structures on the system. This is simply a layered
2041 * walk on top of ::walk zio_cache, with the optional ability to limit the
2042 * structures to a particular pool.
2043 */
2044 static int
zio_walk_init(mdb_walk_state_t * wsp)2045 zio_walk_init(mdb_walk_state_t *wsp)
2046 {
2047 wsp->walk_data = (void *)wsp->walk_addr;
2048
2049 if (mdb_layered_walk("zio_cache", wsp) == -1) {
2050 mdb_warn("failed to walk 'zio_cache'\n");
2051 return (WALK_ERR);
2052 }
2053
2054 return (WALK_NEXT);
2055 }
2056
2057 static int
zio_walk_step(mdb_walk_state_t * wsp)2058 zio_walk_step(mdb_walk_state_t *wsp)
2059 {
2060 zio_t zio;
2061
2062 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) {
2063 mdb_warn("failed to read zio_t at %p", wsp->walk_addr);
2064 return (WALK_ERR);
2065 }
2066
2067 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa)
2068 return (WALK_NEXT);
2069
2070 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2071 }
2072
2073 /*
2074 * [addr]::walk zio_root
2075 *
2076 * Walk only root zio_t structures, optionally for a particular spa_t.
2077 */
2078 static int
zio_walk_root_step(mdb_walk_state_t * wsp)2079 zio_walk_root_step(mdb_walk_state_t *wsp)
2080 {
2081 zio_t zio;
2082
2083 if (mdb_vread(&zio, sizeof (zio), wsp->walk_addr) == -1) {
2084 mdb_warn("failed to read zio_t at %p", wsp->walk_addr);
2085 return (WALK_ERR);
2086 }
2087
2088 if (wsp->walk_data != NULL && wsp->walk_data != zio.io_spa)
2089 return (WALK_NEXT);
2090
2091 /* If the parent list is not empty, ignore */
2092 if (zio.io_parent_list.list_head.list_next !=
2093 &((zio_t *)wsp->walk_addr)->io_parent_list.list_head)
2094 return (WALK_NEXT);
2095
2096 return (wsp->walk_callback(wsp->walk_addr, &zio, wsp->walk_cbdata));
2097 }
2098
2099 #define NICENUM_BUFLEN 6
2100
2101 static int
snprintfrac(char * buf,int len,uint64_t numerator,uint64_t denom,int frac_digits)2102 snprintfrac(char *buf, int len,
2103 uint64_t numerator, uint64_t denom, int frac_digits)
2104 {
2105 int mul = 1;
2106 int whole, frac, i;
2107
2108 for (i = frac_digits; i; i--)
2109 mul *= 10;
2110 whole = numerator / denom;
2111 frac = mul * numerator / denom - mul * whole;
2112 return (mdb_snprintf(buf, len, "%u.%0*u", whole, frac_digits, frac));
2113 }
2114
2115 static void
mdb_nicenum(uint64_t num,char * buf)2116 mdb_nicenum(uint64_t num, char *buf)
2117 {
2118 uint64_t n = num;
2119 int index = 0;
2120 char *u;
2121
2122 while (n >= 1024) {
2123 n = (n + (1024 / 2)) / 1024; /* Round up or down */
2124 index++;
2125 }
2126
2127 u = &" \0K\0M\0G\0T\0P\0E\0"[index*2];
2128
2129 if (index == 0) {
2130 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu",
2131 (u_longlong_t)n);
2132 } else if (n < 10 && (num & (num - 1)) != 0) {
2133 (void) snprintfrac(buf, NICENUM_BUFLEN,
2134 num, 1ULL << 10 * index, 2);
2135 strcat(buf, u);
2136 } else if (n < 100 && (num & (num - 1)) != 0) {
2137 (void) snprintfrac(buf, NICENUM_BUFLEN,
2138 num, 1ULL << 10 * index, 1);
2139 strcat(buf, u);
2140 } else {
2141 (void) mdb_snprintf(buf, NICENUM_BUFLEN, "%llu%s",
2142 (u_longlong_t)n, u);
2143 }
2144 }
2145
2146 /*
2147 * ::zfs_blkstats
2148 *
2149 * -v print verbose per-level information
2150 *
2151 */
2152 static int
zfs_blkstats(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2153 zfs_blkstats(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2154 {
2155 boolean_t verbose = B_FALSE;
2156 zfs_all_blkstats_t stats;
2157 dmu_object_type_t t;
2158 zfs_blkstat_t *tzb;
2159 uint64_t ditto;
2160 dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES + 10];
2161 /* +10 in case it grew */
2162
2163 if (mdb_readvar(&dmu_ot, "dmu_ot") == -1) {
2164 mdb_warn("failed to read 'dmu_ot'");
2165 return (DCMD_ERR);
2166 }
2167
2168 if (mdb_getopts(argc, argv,
2169 'v', MDB_OPT_SETBITS, TRUE, &verbose,
2170 NULL) != argc)
2171 return (DCMD_USAGE);
2172
2173 if (!(flags & DCMD_ADDRSPEC))
2174 return (DCMD_USAGE);
2175
2176 if (GETMEMB(addr, struct spa, spa_dsl_pool, addr) ||
2177 GETMEMB(addr, struct dsl_pool, dp_blkstats, addr) ||
2178 mdb_vread(&stats, sizeof (zfs_all_blkstats_t), addr) == -1) {
2179 mdb_warn("failed to read data at %p;", addr);
2180 mdb_printf("maybe no stats? run \"zpool scrub\" first.");
2181 return (DCMD_ERR);
2182 }
2183
2184 tzb = &stats.zab_type[DN_MAX_LEVELS][DMU_OT_NUMTYPES];
2185 if (tzb->zb_gangs != 0) {
2186 mdb_printf("Ganged blocks: %llu\n",
2187 (longlong_t)tzb->zb_gangs);
2188 }
2189
2190 ditto = tzb->zb_ditto_2_of_2_samevdev + tzb->zb_ditto_2_of_3_samevdev +
2191 tzb->zb_ditto_3_of_3_samevdev;
2192 if (ditto != 0) {
2193 mdb_printf("Dittoed blocks on same vdev: %llu\n",
2194 (longlong_t)ditto);
2195 }
2196
2197 mdb_printf("\nBlocks\tLSIZE\tPSIZE\tASIZE"
2198 "\t avg\t comp\t%%Total\tType\n");
2199
2200 for (t = 0; t <= DMU_OT_NUMTYPES; t++) {
2201 char csize[NICENUM_BUFLEN], lsize[NICENUM_BUFLEN];
2202 char psize[NICENUM_BUFLEN], asize[NICENUM_BUFLEN];
2203 char avg[NICENUM_BUFLEN];
2204 char comp[NICENUM_BUFLEN], pct[NICENUM_BUFLEN];
2205 char typename[64];
2206 int l;
2207
2208
2209 if (t == DMU_OT_DEFERRED)
2210 strcpy(typename, "deferred free");
2211 else if (t == DMU_OT_TOTAL)
2212 strcpy(typename, "Total");
2213 else if (mdb_readstr(typename, sizeof (typename),
2214 (uintptr_t)dmu_ot[t].ot_name) == -1) {
2215 mdb_warn("failed to read type name");
2216 return (DCMD_ERR);
2217 }
2218
2219 if (stats.zab_type[DN_MAX_LEVELS][t].zb_asize == 0)
2220 continue;
2221
2222 for (l = -1; l < DN_MAX_LEVELS; l++) {
2223 int level = (l == -1 ? DN_MAX_LEVELS : l);
2224 zfs_blkstat_t *zb = &stats.zab_type[level][t];
2225
2226 if (zb->zb_asize == 0)
2227 continue;
2228
2229 /*
2230 * Don't print each level unless requested.
2231 */
2232 if (!verbose && level != DN_MAX_LEVELS)
2233 continue;
2234
2235 /*
2236 * If all the space is level 0, don't print the
2237 * level 0 separately.
2238 */
2239 if (level == 0 && zb->zb_asize ==
2240 stats.zab_type[DN_MAX_LEVELS][t].zb_asize)
2241 continue;
2242
2243 mdb_nicenum(zb->zb_count, csize);
2244 mdb_nicenum(zb->zb_lsize, lsize);
2245 mdb_nicenum(zb->zb_psize, psize);
2246 mdb_nicenum(zb->zb_asize, asize);
2247 mdb_nicenum(zb->zb_asize / zb->zb_count, avg);
2248 (void) snprintfrac(comp, NICENUM_BUFLEN,
2249 zb->zb_lsize, zb->zb_psize, 2);
2250 (void) snprintfrac(pct, NICENUM_BUFLEN,
2251 100 * zb->zb_asize, tzb->zb_asize, 2);
2252
2253 mdb_printf("%6s\t%5s\t%5s\t%5s\t%5s"
2254 "\t%5s\t%6s\t",
2255 csize, lsize, psize, asize, avg, comp, pct);
2256
2257 if (level == DN_MAX_LEVELS)
2258 mdb_printf("%s\n", typename);
2259 else
2260 mdb_printf(" L%d %s\n",
2261 level, typename);
2262 }
2263 }
2264
2265 return (DCMD_OK);
2266 }
2267
2268 /* ARGSUSED */
2269 static int
reference_cb(uintptr_t addr,const void * ignored,void * arg)2270 reference_cb(uintptr_t addr, const void *ignored, void *arg)
2271 {
2272 static int gotid;
2273 static mdb_ctf_id_t ref_id;
2274 uintptr_t ref_holder;
2275 uintptr_t ref_removed;
2276 uint64_t ref_number;
2277 boolean_t holder_is_str = B_FALSE;
2278 char holder_str[128];
2279 boolean_t removed = (boolean_t)arg;
2280
2281 if (!gotid) {
2282 if (mdb_ctf_lookup_by_name("struct reference", &ref_id) == -1) {
2283 mdb_warn("couldn't find struct reference");
2284 return (WALK_ERR);
2285 }
2286 gotid = TRUE;
2287 }
2288
2289 if (GETMEMBID(addr, &ref_id, ref_holder, ref_holder) ||
2290 GETMEMBID(addr, &ref_id, ref_removed, ref_removed) ||
2291 GETMEMBID(addr, &ref_id, ref_number, ref_number))
2292 return (WALK_ERR);
2293
2294 if (mdb_readstr(holder_str, sizeof (holder_str), ref_holder) != -1)
2295 holder_is_str = strisprint(holder_str);
2296
2297 if (removed)
2298 mdb_printf("removed ");
2299 mdb_printf("reference ");
2300 if (ref_number != 1)
2301 mdb_printf("with count=%llu ", ref_number);
2302 mdb_printf("with tag %p", (void*)ref_holder);
2303 if (holder_is_str)
2304 mdb_printf(" \"%s\"", holder_str);
2305 mdb_printf(", held at:\n");
2306
2307 (void) mdb_call_dcmd("whatis", addr, DCMD_ADDRSPEC, 0, NULL);
2308
2309 if (removed) {
2310 mdb_printf("removed at:\n");
2311 (void) mdb_call_dcmd("whatis", ref_removed,
2312 DCMD_ADDRSPEC, 0, NULL);
2313 }
2314
2315 mdb_printf("\n");
2316
2317 return (WALK_NEXT);
2318 }
2319
2320 /* ARGSUSED */
2321 static int
refcount(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2322 refcount(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2323 {
2324 uint64_t rc_count, rc_removed_count;
2325 uintptr_t rc_list, rc_removed;
2326 static int gotid;
2327 static mdb_ctf_id_t rc_id;
2328 ulong_t off;
2329
2330 if (!(flags & DCMD_ADDRSPEC))
2331 return (DCMD_USAGE);
2332
2333 if (!gotid) {
2334 if (mdb_ctf_lookup_by_name("struct refcount", &rc_id) == -1) {
2335 mdb_warn("couldn't find struct refcount");
2336 return (DCMD_ERR);
2337 }
2338 gotid = TRUE;
2339 }
2340
2341 if (GETMEMBID(addr, &rc_id, rc_count, rc_count) ||
2342 GETMEMBID(addr, &rc_id, rc_removed_count, rc_removed_count))
2343 return (DCMD_ERR);
2344
2345 mdb_printf("refcount_t at %p has %llu current holds, "
2346 "%llu recently released holds\n",
2347 addr, (longlong_t)rc_count, (longlong_t)rc_removed_count);
2348
2349 if (rc_count > 0)
2350 mdb_printf("current holds:\n");
2351 if (mdb_ctf_offsetof(rc_id, "rc_list", &off) == -1)
2352 return (DCMD_ERR);
2353 rc_list = addr + off/NBBY;
2354 mdb_pwalk("list", reference_cb, (void*)B_FALSE, rc_list);
2355
2356 if (rc_removed_count > 0)
2357 mdb_printf("released holds:\n");
2358 if (mdb_ctf_offsetof(rc_id, "rc_removed", &off) == -1)
2359 return (DCMD_ERR);
2360 rc_removed = addr + off/NBBY;
2361 mdb_pwalk("list", reference_cb, (void*)B_TRUE, rc_removed);
2362
2363 return (DCMD_OK);
2364 }
2365
2366 /* ARGSUSED */
2367 static int
sa_attr_table(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2368 sa_attr_table(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2369 {
2370 sa_attr_table_t *table;
2371 sa_os_t sa_os;
2372 char *name;
2373 int i;
2374
2375 if (mdb_vread(&sa_os, sizeof (sa_os_t), addr) == -1) {
2376 mdb_warn("failed to read sa_os at %p", addr);
2377 return (DCMD_ERR);
2378 }
2379
2380 table = mdb_alloc(sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2381 UM_SLEEP | UM_GC);
2382 name = mdb_alloc(MAXPATHLEN, UM_SLEEP | UM_GC);
2383
2384 if (mdb_vread(table, sizeof (sa_attr_table_t) * sa_os.sa_num_attrs,
2385 (uintptr_t)sa_os.sa_attr_table) == -1) {
2386 mdb_warn("failed to read sa_os at %p", addr);
2387 return (DCMD_ERR);
2388 }
2389
2390 mdb_printf("%<u>%-10s %-10s %-10s %-10s %s%</u>\n",
2391 "ATTR ID", "REGISTERED", "LENGTH", "BSWAP", "NAME");
2392 for (i = 0; i != sa_os.sa_num_attrs; i++) {
2393 mdb_readstr(name, MAXPATHLEN, (uintptr_t)table[i].sa_name);
2394 mdb_printf("%5x %8x %8x %8x %-s\n",
2395 (int)table[i].sa_attr, (int)table[i].sa_registered,
2396 (int)table[i].sa_length, table[i].sa_byteswap, name);
2397 }
2398
2399 return (DCMD_OK);
2400 }
2401
2402 static int
sa_get_off_table(uintptr_t addr,uint32_t ** off_tab,int attr_count)2403 sa_get_off_table(uintptr_t addr, uint32_t **off_tab, int attr_count)
2404 {
2405 uintptr_t idx_table;
2406
2407 if (GETMEMB(addr, struct sa_idx_tab, sa_idx_tab, idx_table)) {
2408 mdb_printf("can't find offset table in sa_idx_tab\n");
2409 return (-1);
2410 }
2411
2412 *off_tab = mdb_alloc(attr_count * sizeof (uint32_t),
2413 UM_SLEEP | UM_GC);
2414
2415 if (mdb_vread(*off_tab,
2416 attr_count * sizeof (uint32_t), idx_table) == -1) {
2417 mdb_warn("failed to attribute offset table %p", idx_table);
2418 return (-1);
2419 }
2420
2421 return (DCMD_OK);
2422 }
2423
2424 /*ARGSUSED*/
2425 static int
sa_attr_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2426 sa_attr_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2427 {
2428 uint32_t *offset_tab;
2429 int attr_count;
2430 uint64_t attr_id;
2431 uintptr_t attr_addr;
2432 uintptr_t bonus_tab, spill_tab;
2433 uintptr_t db_bonus, db_spill;
2434 uintptr_t os, os_sa;
2435 uintptr_t db_data;
2436
2437 if (argc != 1)
2438 return (DCMD_USAGE);
2439
2440 if (argv[0].a_type == MDB_TYPE_STRING)
2441 attr_id = mdb_strtoull(argv[0].a_un.a_str);
2442 else
2443 return (DCMD_USAGE);
2444
2445 if (GETMEMB(addr, struct sa_handle, sa_bonus_tab, bonus_tab) ||
2446 GETMEMB(addr, struct sa_handle, sa_spill_tab, spill_tab) ||
2447 GETMEMB(addr, struct sa_handle, sa_os, os) ||
2448 GETMEMB(addr, struct sa_handle, sa_bonus, db_bonus) ||
2449 GETMEMB(addr, struct sa_handle, sa_spill, db_spill)) {
2450 mdb_printf("Can't find necessary information in sa_handle "
2451 "in sa_handle\n");
2452 return (DCMD_ERR);
2453 }
2454
2455 if (GETMEMB(os, struct objset, os_sa, os_sa)) {
2456 mdb_printf("Can't find os_sa in objset\n");
2457 return (DCMD_ERR);
2458 }
2459
2460 if (GETMEMB(os_sa, struct sa_os, sa_num_attrs, attr_count)) {
2461 mdb_printf("Can't find sa_num_attrs\n");
2462 return (DCMD_ERR);
2463 }
2464
2465 if (attr_id > attr_count) {
2466 mdb_printf("attribute id number is out of range\n");
2467 return (DCMD_ERR);
2468 }
2469
2470 if (bonus_tab) {
2471 if (sa_get_off_table(bonus_tab, &offset_tab,
2472 attr_count) == -1) {
2473 return (DCMD_ERR);
2474 }
2475
2476 if (GETMEMB(db_bonus, struct dmu_buf, db_data, db_data)) {
2477 mdb_printf("can't find db_data in bonus dbuf\n");
2478 return (DCMD_ERR);
2479 }
2480 }
2481
2482 if (bonus_tab && !TOC_ATTR_PRESENT(offset_tab[attr_id]) &&
2483 spill_tab == NULL) {
2484 mdb_printf("Attribute does not exist\n");
2485 return (DCMD_ERR);
2486 } else if (!TOC_ATTR_PRESENT(offset_tab[attr_id]) && spill_tab) {
2487 if (sa_get_off_table(spill_tab, &offset_tab,
2488 attr_count) == -1) {
2489 return (DCMD_ERR);
2490 }
2491 if (GETMEMB(db_spill, struct dmu_buf, db_data, db_data)) {
2492 mdb_printf("can't find db_data in spill dbuf\n");
2493 return (DCMD_ERR);
2494 }
2495 if (!TOC_ATTR_PRESENT(offset_tab[attr_id])) {
2496 mdb_printf("Attribute does not exist\n");
2497 return (DCMD_ERR);
2498 }
2499 }
2500 attr_addr = db_data + TOC_OFF(offset_tab[attr_id]);
2501 mdb_printf("%p\n", attr_addr);
2502 return (DCMD_OK);
2503 }
2504
2505 /* ARGSUSED */
2506 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)2507 zfs_ace_print_common(uintptr_t addr, uint_t flags,
2508 uint64_t id, uint32_t access_mask, uint16_t ace_flags,
2509 uint16_t ace_type, int verbose)
2510 {
2511 if (DCMD_HDRSPEC(flags) && !verbose)
2512 mdb_printf("%<u>%-?s %-8s %-8s %-8s %s%</u>\n",
2513 "ADDR", "FLAGS", "MASK", "TYPE", "ID");
2514
2515 if (!verbose) {
2516 mdb_printf("%0?p %-8x %-8x %-8x %-llx\n", addr,
2517 ace_flags, access_mask, ace_type, id);
2518 return (DCMD_OK);
2519 }
2520
2521 switch (ace_flags & ACE_TYPE_FLAGS) {
2522 case ACE_OWNER:
2523 mdb_printf("owner@:");
2524 break;
2525 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
2526 mdb_printf("group@:");
2527 break;
2528 case ACE_EVERYONE:
2529 mdb_printf("everyone@:");
2530 break;
2531 case ACE_IDENTIFIER_GROUP:
2532 mdb_printf("group:%llx:", (u_longlong_t)id);
2533 break;
2534 case 0: /* User entry */
2535 mdb_printf("user:%llx:", (u_longlong_t)id);
2536 break;
2537 }
2538
2539 /* print out permission mask */
2540 if (access_mask & ACE_READ_DATA)
2541 mdb_printf("r");
2542 else
2543 mdb_printf("-");
2544 if (access_mask & ACE_WRITE_DATA)
2545 mdb_printf("w");
2546 else
2547 mdb_printf("-");
2548 if (access_mask & ACE_EXECUTE)
2549 mdb_printf("x");
2550 else
2551 mdb_printf("-");
2552 if (access_mask & ACE_APPEND_DATA)
2553 mdb_printf("p");
2554 else
2555 mdb_printf("-");
2556 if (access_mask & ACE_DELETE)
2557 mdb_printf("d");
2558 else
2559 mdb_printf("-");
2560 if (access_mask & ACE_DELETE_CHILD)
2561 mdb_printf("D");
2562 else
2563 mdb_printf("-");
2564 if (access_mask & ACE_READ_ATTRIBUTES)
2565 mdb_printf("a");
2566 else
2567 mdb_printf("-");
2568 if (access_mask & ACE_WRITE_ATTRIBUTES)
2569 mdb_printf("A");
2570 else
2571 mdb_printf("-");
2572 if (access_mask & ACE_READ_NAMED_ATTRS)
2573 mdb_printf("R");
2574 else
2575 mdb_printf("-");
2576 if (access_mask & ACE_WRITE_NAMED_ATTRS)
2577 mdb_printf("W");
2578 else
2579 mdb_printf("-");
2580 if (access_mask & ACE_READ_ACL)
2581 mdb_printf("c");
2582 else
2583 mdb_printf("-");
2584 if (access_mask & ACE_WRITE_ACL)
2585 mdb_printf("C");
2586 else
2587 mdb_printf("-");
2588 if (access_mask & ACE_WRITE_OWNER)
2589 mdb_printf("o");
2590 else
2591 mdb_printf("-");
2592 if (access_mask & ACE_SYNCHRONIZE)
2593 mdb_printf("s");
2594 else
2595 mdb_printf("-");
2596
2597 mdb_printf(":");
2598
2599 /* Print out inheritance flags */
2600 if (ace_flags & ACE_FILE_INHERIT_ACE)
2601 mdb_printf("f");
2602 else
2603 mdb_printf("-");
2604 if (ace_flags & ACE_DIRECTORY_INHERIT_ACE)
2605 mdb_printf("d");
2606 else
2607 mdb_printf("-");
2608 if (ace_flags & ACE_INHERIT_ONLY_ACE)
2609 mdb_printf("i");
2610 else
2611 mdb_printf("-");
2612 if (ace_flags & ACE_NO_PROPAGATE_INHERIT_ACE)
2613 mdb_printf("n");
2614 else
2615 mdb_printf("-");
2616 if (ace_flags & ACE_SUCCESSFUL_ACCESS_ACE_FLAG)
2617 mdb_printf("S");
2618 else
2619 mdb_printf("-");
2620 if (ace_flags & ACE_FAILED_ACCESS_ACE_FLAG)
2621 mdb_printf("F");
2622 else
2623 mdb_printf("-");
2624 if (ace_flags & ACE_INHERITED_ACE)
2625 mdb_printf("I");
2626 else
2627 mdb_printf("-");
2628
2629 switch (ace_type) {
2630 case ACE_ACCESS_ALLOWED_ACE_TYPE:
2631 mdb_printf(":allow\n");
2632 break;
2633 case ACE_ACCESS_DENIED_ACE_TYPE:
2634 mdb_printf(":deny\n");
2635 break;
2636 case ACE_SYSTEM_AUDIT_ACE_TYPE:
2637 mdb_printf(":audit\n");
2638 break;
2639 case ACE_SYSTEM_ALARM_ACE_TYPE:
2640 mdb_printf(":alarm\n");
2641 break;
2642 default:
2643 mdb_printf(":?\n");
2644 }
2645 return (DCMD_OK);
2646 }
2647
2648 /* ARGSUSED */
2649 static int
zfs_ace_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2650 zfs_ace_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2651 {
2652 zfs_ace_t zace;
2653 int verbose = FALSE;
2654 uint64_t id;
2655
2656 if (!(flags & DCMD_ADDRSPEC))
2657 return (DCMD_USAGE);
2658
2659 if (mdb_getopts(argc, argv,
2660 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2661 return (DCMD_USAGE);
2662
2663 if (mdb_vread(&zace, sizeof (zfs_ace_t), addr) == -1) {
2664 mdb_warn("failed to read zfs_ace_t");
2665 return (DCMD_ERR);
2666 }
2667
2668 if ((zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == 0 ||
2669 (zace.z_hdr.z_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2670 id = zace.z_fuid;
2671 else
2672 id = -1;
2673
2674 return (zfs_ace_print_common(addr, flags, id, zace.z_hdr.z_access_mask,
2675 zace.z_hdr.z_flags, zace.z_hdr.z_type, verbose));
2676 }
2677
2678 /* ARGSUSED */
2679 static int
zfs_ace0_print(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2680 zfs_ace0_print(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2681 {
2682 ace_t ace;
2683 uint64_t id;
2684 int verbose = FALSE;
2685
2686 if (!(flags & DCMD_ADDRSPEC))
2687 return (DCMD_USAGE);
2688
2689 if (mdb_getopts(argc, argv,
2690 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2691 return (DCMD_USAGE);
2692
2693 if (mdb_vread(&ace, sizeof (ace_t), addr) == -1) {
2694 mdb_warn("failed to read ace_t");
2695 return (DCMD_ERR);
2696 }
2697
2698 if ((ace.a_flags & ACE_TYPE_FLAGS) == 0 ||
2699 (ace.a_flags & ACE_TYPE_FLAGS) == ACE_IDENTIFIER_GROUP)
2700 id = ace.a_who;
2701 else
2702 id = -1;
2703
2704 return (zfs_ace_print_common(addr, flags, id, ace.a_access_mask,
2705 ace.a_flags, ace.a_type, verbose));
2706 }
2707
2708 typedef struct acl_dump_args {
2709 int a_argc;
2710 const mdb_arg_t *a_argv;
2711 uint16_t a_version;
2712 int a_flags;
2713 } acl_dump_args_t;
2714
2715 /* ARGSUSED */
2716 static int
acl_aces_cb(uintptr_t addr,const void * unknown,void * arg)2717 acl_aces_cb(uintptr_t addr, const void *unknown, void *arg)
2718 {
2719 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2720
2721 if (acl_args->a_version == 1) {
2722 if (mdb_call_dcmd("zfs_ace", addr,
2723 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2724 acl_args->a_argv) != DCMD_OK) {
2725 return (WALK_ERR);
2726 }
2727 } else {
2728 if (mdb_call_dcmd("zfs_ace0", addr,
2729 DCMD_ADDRSPEC|acl_args->a_flags, acl_args->a_argc,
2730 acl_args->a_argv) != DCMD_OK) {
2731 return (WALK_ERR);
2732 }
2733 }
2734 acl_args->a_flags = DCMD_LOOP;
2735 return (WALK_NEXT);
2736 }
2737
2738 /* ARGSUSED */
2739 static int
acl_cb(uintptr_t addr,const void * unknown,void * arg)2740 acl_cb(uintptr_t addr, const void *unknown, void *arg)
2741 {
2742 acl_dump_args_t *acl_args = (acl_dump_args_t *)arg;
2743
2744 if (acl_args->a_version == 1) {
2745 if (mdb_pwalk("zfs_acl_node_aces", acl_aces_cb,
2746 arg, addr) != 0) {
2747 mdb_warn("can't walk ACEs");
2748 return (DCMD_ERR);
2749 }
2750 } else {
2751 if (mdb_pwalk("zfs_acl_node_aces0", acl_aces_cb,
2752 arg, addr) != 0) {
2753 mdb_warn("can't walk ACEs");
2754 return (DCMD_ERR);
2755 }
2756 }
2757 return (WALK_NEXT);
2758 }
2759
2760 /* ARGSUSED */
2761 static int
zfs_acl_dump(uintptr_t addr,uint_t flags,int argc,const mdb_arg_t * argv)2762 zfs_acl_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
2763 {
2764 zfs_acl_t zacl;
2765 int verbose = FALSE;
2766 acl_dump_args_t acl_args;
2767
2768 if (!(flags & DCMD_ADDRSPEC))
2769 return (DCMD_USAGE);
2770
2771 if (mdb_getopts(argc, argv,
2772 'v', MDB_OPT_SETBITS, TRUE, &verbose, TRUE, NULL) != argc)
2773 return (DCMD_USAGE);
2774
2775 if (mdb_vread(&zacl, sizeof (zfs_acl_t), addr) == -1) {
2776 mdb_warn("failed to read zfs_acl_t");
2777 return (DCMD_ERR);
2778 }
2779
2780 acl_args.a_argc = argc;
2781 acl_args.a_argv = argv;
2782 acl_args.a_version = zacl.z_version;
2783 acl_args.a_flags = DCMD_LOOPFIRST;
2784
2785 if (mdb_pwalk("zfs_acl_node", acl_cb, &acl_args, addr) != 0) {
2786 mdb_warn("can't walk ACL");
2787 return (DCMD_ERR);
2788 }
2789
2790 return (DCMD_OK);
2791 }
2792
2793 /* ARGSUSED */
2794 static int
zfs_acl_node_walk_init(mdb_walk_state_t * wsp)2795 zfs_acl_node_walk_init(mdb_walk_state_t *wsp)
2796 {
2797 if (wsp->walk_addr == NULL) {
2798 mdb_warn("must supply address of zfs_acl_node_t\n");
2799 return (WALK_ERR);
2800 }
2801
2802 wsp->walk_addr += OFFSETOF(zfs_acl_t, z_acl);
2803
2804 if (mdb_layered_walk("list", wsp) == -1) {
2805 mdb_warn("failed to walk 'list'\n");
2806 return (WALK_ERR);
2807 }
2808
2809 return (WALK_NEXT);
2810 }
2811
2812 static int
zfs_acl_node_walk_step(mdb_walk_state_t * wsp)2813 zfs_acl_node_walk_step(mdb_walk_state_t *wsp)
2814 {
2815 zfs_acl_node_t aclnode;
2816
2817 if (mdb_vread(&aclnode, sizeof (zfs_acl_node_t),
2818 wsp->walk_addr) == -1) {
2819 mdb_warn("failed to read zfs_acl_node at %p", wsp->walk_addr);
2820 return (WALK_ERR);
2821 }
2822
2823 return (wsp->walk_callback(wsp->walk_addr, &aclnode, wsp->walk_cbdata));
2824 }
2825
2826 typedef struct ace_walk_data {
2827 int ace_count;
2828 int ace_version;
2829 } ace_walk_data_t;
2830
2831 static int
zfs_aces_walk_init_common(mdb_walk_state_t * wsp,int version,int ace_count,uintptr_t ace_data)2832 zfs_aces_walk_init_common(mdb_walk_state_t *wsp, int version,
2833 int ace_count, uintptr_t ace_data)
2834 {
2835 ace_walk_data_t *ace_walk_data;
2836
2837 if (wsp->walk_addr == NULL) {
2838 mdb_warn("must supply address of zfs_acl_node_t\n");
2839 return (WALK_ERR);
2840 }
2841
2842 ace_walk_data = mdb_alloc(sizeof (ace_walk_data_t), UM_SLEEP | UM_GC);
2843
2844 ace_walk_data->ace_count = ace_count;
2845 ace_walk_data->ace_version = version;
2846
2847 wsp->walk_addr = ace_data;
2848 wsp->walk_data = ace_walk_data;
2849
2850 return (WALK_NEXT);
2851 }
2852
2853 static int
zfs_acl_node_aces_walk_init_common(mdb_walk_state_t * wsp,int version)2854 zfs_acl_node_aces_walk_init_common(mdb_walk_state_t *wsp, int version)
2855 {
2856 static int gotid;
2857 static mdb_ctf_id_t acl_id;
2858 int z_ace_count;
2859 uintptr_t z_acldata;
2860
2861 if (!gotid) {
2862 if (mdb_ctf_lookup_by_name("struct zfs_acl_node",
2863 &acl_id) == -1) {
2864 mdb_warn("couldn't find struct zfs_acl_node");
2865 return (DCMD_ERR);
2866 }
2867 gotid = TRUE;
2868 }
2869
2870 if (GETMEMBID(wsp->walk_addr, &acl_id, z_ace_count, z_ace_count)) {
2871 return (DCMD_ERR);
2872 }
2873 if (GETMEMBID(wsp->walk_addr, &acl_id, z_acldata, z_acldata)) {
2874 return (DCMD_ERR);
2875 }
2876
2877 return (zfs_aces_walk_init_common(wsp, version,
2878 z_ace_count, z_acldata));
2879 }
2880
2881 /* ARGSUSED */
2882 static int
zfs_acl_node_aces_walk_init(mdb_walk_state_t * wsp)2883 zfs_acl_node_aces_walk_init(mdb_walk_state_t *wsp)
2884 {
2885 return (zfs_acl_node_aces_walk_init_common(wsp, 1));
2886 }
2887
2888 /* ARGSUSED */
2889 static int
zfs_acl_node_aces0_walk_init(mdb_walk_state_t * wsp)2890 zfs_acl_node_aces0_walk_init(mdb_walk_state_t *wsp)
2891 {
2892 return (zfs_acl_node_aces_walk_init_common(wsp, 0));
2893 }
2894
2895 static int
zfs_aces_walk_step(mdb_walk_state_t * wsp)2896 zfs_aces_walk_step(mdb_walk_state_t *wsp)
2897 {
2898 ace_walk_data_t *ace_data = wsp->walk_data;
2899 zfs_ace_t zace;
2900 ace_t *acep;
2901 int status;
2902 int entry_type;
2903 int allow_type;
2904 uintptr_t ptr;
2905
2906 if (ace_data->ace_count == 0)
2907 return (WALK_DONE);
2908
2909 if (mdb_vread(&zace, sizeof (zfs_ace_t), wsp->walk_addr) == -1) {
2910 mdb_warn("failed to read zfs_ace_t at %#lx",
2911 wsp->walk_addr);
2912 return (WALK_ERR);
2913 }
2914
2915 switch (ace_data->ace_version) {
2916 case 0:
2917 acep = (ace_t *)&zace;
2918 entry_type = acep->a_flags & ACE_TYPE_FLAGS;
2919 allow_type = acep->a_type;
2920 break;
2921 case 1:
2922 entry_type = zace.z_hdr.z_flags & ACE_TYPE_FLAGS;
2923 allow_type = zace.z_hdr.z_type;
2924 break;
2925 default:
2926 return (WALK_ERR);
2927 }
2928
2929 ptr = (uintptr_t)wsp->walk_addr;
2930 switch (entry_type) {
2931 case ACE_OWNER:
2932 case ACE_EVERYONE:
2933 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
2934 ptr += ace_data->ace_version == 0 ?
2935 sizeof (ace_t) : sizeof (zfs_ace_hdr_t);
2936 break;
2937 case ACE_IDENTIFIER_GROUP:
2938 default:
2939 switch (allow_type) {
2940 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
2941 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
2942 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
2943 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
2944 ptr += ace_data->ace_version == 0 ?
2945 sizeof (ace_t) : sizeof (zfs_object_ace_t);
2946 break;
2947 default:
2948 ptr += ace_data->ace_version == 0 ?
2949 sizeof (ace_t) : sizeof (zfs_ace_t);
2950 break;
2951 }
2952 }
2953
2954 ace_data->ace_count--;
2955 status = wsp->walk_callback(wsp->walk_addr,
2956 (void *)(uintptr_t)&zace, wsp->walk_cbdata);
2957
2958 wsp->walk_addr = ptr;
2959 return (status);
2960 }
2961
2962 /*
2963 * MDB module linkage information:
2964 *
2965 * We declare a list of structures describing our dcmds, and a function
2966 * named _mdb_init to return a pointer to our module information.
2967 */
2968
2969 static const mdb_dcmd_t dcmds[] = {
2970 { "arc", "[-bkmg]", "print ARC variables", arc_print },
2971 { "blkptr", ":", "print blkptr_t", blkptr },
2972 { "dbuf", ":", "print dmu_buf_impl_t", dbuf },
2973 { "dbuf_stats", ":", "dbuf stats", dbuf_stats },
2974 { "dbufs",
2975 "\t[-O objset_t*] [-n objset_name | \"mos\"] "
2976 "[-o object | \"mdn\"] \n"
2977 "\t[-l level] [-b blkid | \"bonus\"]",
2978 "find dmu_buf_impl_t's that match specified criteria", dbufs },
2979 { "abuf_find", "dva_word[0] dva_word[1]",
2980 "find arc_buf_hdr_t of a specified DVA",
2981 abuf_find },
2982 { "spa", "?[-cv]", "spa_t summary", spa_print },
2983 { "spa_config", ":", "print spa_t configuration", spa_print_config },
2984 { "spa_verify", ":", "verify spa_t consistency", spa_verify },
2985 { "spa_space", ":[-b]", "print spa_t on-disk space usage", spa_space },
2986 { "spa_vdevs", ":", "given a spa_t, print vdev summary", spa_vdevs },
2987 { "vdev", ":[-re]\n"
2988 "\t-r display recursively\n"
2989 "\t-e print statistics",
2990 "vdev_t summary", vdev_print },
2991 { "zio", ":[cpr]\n"
2992 "\t-c display children\n"
2993 "\t-p display parents\n"
2994 "\t-r display recursively",
2995 "zio_t summary", zio_print },
2996 { "zio_state", "?", "print out all zio_t structures on system or "
2997 "for a particular pool", zio_state },
2998 { "zfs_blkstats", ":[-v]",
2999 "given a spa_t, print block type stats from last scrub",
3000 zfs_blkstats },
3001 { "zfs_params", "", "print zfs tunable parameters", zfs_params },
3002 { "refcount", "", "print refcount_t holders", refcount },
3003 { "zap_leaf", "", "print zap_leaf_phys_t", zap_leaf },
3004 { "zfs_aces", ":[-v]", "print all ACEs from a zfs_acl_t",
3005 zfs_acl_dump },
3006 { "zfs_ace", ":[-v]", "print zfs_ace", zfs_ace_print },
3007 { "zfs_ace0", ":[-v]", "print zfs_ace0", zfs_ace0_print },
3008 { "sa_attr_table", ":", "print SA attribute table from sa_os_t",
3009 sa_attr_table},
3010 { "sa_attr", ": attr_id",
3011 "print SA attribute address when given sa_handle_t", sa_attr_print},
3012 { "zfs_dbgmsg", ":[-v]",
3013 "print zfs debug log", dbgmsg},
3014 { NULL }
3015 };
3016
3017 static const mdb_walker_t walkers[] = {
3018 { "zms_freelist", "walk ZFS metaslab freelist",
3019 freelist_walk_init, freelist_walk_step, NULL },
3020 { "txg_list", "given any txg_list_t *, walk all entries in all txgs",
3021 txg_list_walk_init, txg_list_walk_step, NULL },
3022 { "txg_list0", "given any txg_list_t *, walk all entries in txg 0",
3023 txg_list0_walk_init, txg_list_walk_step, NULL },
3024 { "txg_list1", "given any txg_list_t *, walk all entries in txg 1",
3025 txg_list1_walk_init, txg_list_walk_step, NULL },
3026 { "txg_list2", "given any txg_list_t *, walk all entries in txg 2",
3027 txg_list2_walk_init, txg_list_walk_step, NULL },
3028 { "txg_list3", "given any txg_list_t *, walk all entries in txg 3",
3029 txg_list3_walk_init, txg_list_walk_step, NULL },
3030 { "zio", "walk all zio structures, optionally for a particular spa_t",
3031 zio_walk_init, zio_walk_step, NULL },
3032 { "zio_root", "walk all root zio_t structures, optionally for a "
3033 "particular spa_t",
3034 zio_walk_init, zio_walk_root_step, NULL },
3035 { "spa", "walk all spa_t entries in the namespace",
3036 spa_walk_init, spa_walk_step, NULL },
3037 { "metaslab", "given a spa_t *, walk all metaslab_t structures",
3038 metaslab_walk_init, metaslab_walk_step, NULL },
3039 { "zfs_acl_node", "given a zfs_acl_t, walk all zfs_acl_nodes",
3040 zfs_acl_node_walk_init, zfs_acl_node_walk_step, NULL },
3041 { "zfs_acl_node_aces", "given a zfs_acl_node_t, walk all ACEs",
3042 zfs_acl_node_aces_walk_init, zfs_aces_walk_step, NULL },
3043 { "zfs_acl_node_aces0",
3044 "given a zfs_acl_node_t, walk all ACEs as ace_t",
3045 zfs_acl_node_aces0_walk_init, zfs_aces_walk_step, NULL },
3046 { NULL }
3047 };
3048
3049 static const mdb_modinfo_t modinfo = {
3050 MDB_API_VERSION, dcmds, walkers
3051 };
3052
3053 const mdb_modinfo_t *
_mdb_init(void)3054 _mdb_init(void)
3055 {
3056 return (&modinfo);
3057 }
3058