1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or https://opensource.org/licenses/CDDL-1.0.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
25 * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
26 * Copyright (c) 2014 Integros [integros.com]
27 * Copyright 2017 Joyent, Inc.
28 */
29
30 #include <sys/spa.h>
31 #include <sys/spa_impl.h>
32 #include <sys/zap.h>
33 #include <sys/dsl_synctask.h>
34 #include <sys/dmu_tx.h>
35 #include <sys/dmu_objset.h>
36 #include <sys/dsl_dataset.h>
37 #include <sys/dsl_dir.h>
38 #include <sys/cmn_err.h>
39 #include <sys/sunddi.h>
40 #include <sys/cred.h>
41 #include "zfs_comutil.h"
42 #include "zfs_gitrev.h"
43 #ifdef _KERNEL
44 #include <sys/zone.h>
45 #endif
46
47 /*
48 * Routines to manage the on-disk history log.
49 *
50 * The history log is stored as a dmu object containing
51 * <packed record length, record nvlist> tuples.
52 *
53 * Where "record nvlist" is an nvlist containing uint64_ts and strings, and
54 * "packed record length" is the packed length of the "record nvlist" stored
55 * as a little endian uint64_t.
56 *
57 * The log is implemented as a ring buffer, though the original creation
58 * of the pool ('zpool create') is never overwritten.
59 *
60 * The history log is tracked as object 'spa_t::spa_history'. The bonus buffer
61 * of 'spa_history' stores the offsets for logging/retrieving history as
62 * 'spa_history_phys_t'. 'sh_pool_create_len' is the ending offset in bytes of
63 * where the 'zpool create' record is stored. This allows us to never
64 * overwrite the original creation of the pool. 'sh_phys_max_off' is the
65 * physical ending offset in bytes of the log. This tells you the length of
66 * the buffer. 'sh_eof' is the logical EOF (in bytes). Whenever a record
67 * is added, 'sh_eof' is incremented by the size of the record.
68 * 'sh_eof' is never decremented. 'sh_bof' is the logical BOF (in bytes).
69 * This is where the consumer should start reading from after reading in
70 * the 'zpool create' portion of the log.
71 *
72 * 'sh_records_lost' keeps track of how many records have been overwritten
73 * and permanently lost.
74 */
75
76 /* convert a logical offset to physical */
77 static uint64_t
spa_history_log_to_phys(uint64_t log_off,spa_history_phys_t * shpp)78 spa_history_log_to_phys(uint64_t log_off, spa_history_phys_t *shpp)
79 {
80 uint64_t phys_len;
81
82 phys_len = shpp->sh_phys_max_off - shpp->sh_pool_create_len;
83 return ((log_off - shpp->sh_pool_create_len) % phys_len
84 + shpp->sh_pool_create_len);
85 }
86
87 void
spa_history_create_obj(spa_t * spa,dmu_tx_t * tx)88 spa_history_create_obj(spa_t *spa, dmu_tx_t *tx)
89 {
90 dmu_buf_t *dbp;
91 spa_history_phys_t *shpp;
92 objset_t *mos = spa->spa_meta_objset;
93
94 ASSERT0(spa->spa_history);
95 spa->spa_history = dmu_object_alloc(mos, DMU_OT_SPA_HISTORY,
96 SPA_OLD_MAXBLOCKSIZE, DMU_OT_SPA_HISTORY_OFFSETS,
97 sizeof (spa_history_phys_t), tx);
98
99 VERIFY0(zap_add(mos, DMU_POOL_DIRECTORY_OBJECT,
100 DMU_POOL_HISTORY, sizeof (uint64_t), 1,
101 &spa->spa_history, tx));
102
103 VERIFY0(dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp));
104 ASSERT3U(dbp->db_size, >=, sizeof (spa_history_phys_t));
105
106 shpp = dbp->db_data;
107 dmu_buf_will_dirty(dbp, tx);
108
109 /*
110 * Figure out maximum size of history log. We set it at
111 * 0.1% of pool size, with a max of 1G and min of 128KB.
112 */
113 shpp->sh_phys_max_off =
114 metaslab_class_get_dspace(spa_normal_class(spa)) / 1000;
115 shpp->sh_phys_max_off = MIN(shpp->sh_phys_max_off, 1<<30);
116 shpp->sh_phys_max_off = MAX(shpp->sh_phys_max_off, 128<<10);
117
118 dmu_buf_rele(dbp, FTAG);
119 }
120
121 /*
122 * Change 'sh_bof' to the beginning of the next record.
123 */
124 static int
spa_history_advance_bof(spa_t * spa,spa_history_phys_t * shpp)125 spa_history_advance_bof(spa_t *spa, spa_history_phys_t *shpp)
126 {
127 objset_t *mos = spa->spa_meta_objset;
128 uint64_t firstread, reclen, phys_bof;
129 char buf[sizeof (reclen)];
130 int err;
131
132 phys_bof = spa_history_log_to_phys(shpp->sh_bof, shpp);
133 firstread = MIN(sizeof (reclen), shpp->sh_phys_max_off - phys_bof);
134
135 if ((err = dmu_read(mos, spa->spa_history, phys_bof, firstread,
136 buf, DMU_READ_PREFETCH)) != 0)
137 return (err);
138 if (firstread != sizeof (reclen)) {
139 if ((err = dmu_read(mos, spa->spa_history,
140 shpp->sh_pool_create_len, sizeof (reclen) - firstread,
141 buf + firstread, DMU_READ_PREFETCH)) != 0)
142 return (err);
143 }
144
145 reclen = LE_64(*((uint64_t *)buf));
146 shpp->sh_bof += reclen + sizeof (reclen);
147 shpp->sh_records_lost++;
148 return (0);
149 }
150
151 static int
spa_history_write(spa_t * spa,void * buf,uint64_t len,spa_history_phys_t * shpp,dmu_tx_t * tx)152 spa_history_write(spa_t *spa, void *buf, uint64_t len, spa_history_phys_t *shpp,
153 dmu_tx_t *tx)
154 {
155 uint64_t firstwrite, phys_eof;
156 objset_t *mos = spa->spa_meta_objset;
157 int err;
158
159 ASSERT(MUTEX_HELD(&spa->spa_history_lock));
160
161 /* see if we need to reset logical BOF */
162 while (shpp->sh_phys_max_off - shpp->sh_pool_create_len -
163 (shpp->sh_eof - shpp->sh_bof) <= len) {
164 if ((err = spa_history_advance_bof(spa, shpp)) != 0) {
165 return (err);
166 }
167 }
168
169 phys_eof = spa_history_log_to_phys(shpp->sh_eof, shpp);
170 firstwrite = MIN(len, shpp->sh_phys_max_off - phys_eof);
171 shpp->sh_eof += len;
172 dmu_write(mos, spa->spa_history, phys_eof, firstwrite, buf, tx,
173 DMU_READ_NO_PREFETCH);
174
175 len -= firstwrite;
176 if (len > 0) {
177 /* write out the rest at the beginning of physical file */
178 dmu_write(mos, spa->spa_history, shpp->sh_pool_create_len,
179 len, (char *)buf + firstwrite, tx, DMU_READ_NO_PREFETCH);
180 }
181
182 return (0);
183 }
184
185 /*
186 * Post a history sysevent.
187 *
188 * The nvlist_t* passed into this function will be transformed into a new
189 * nvlist where:
190 *
191 * 1. Nested nvlists will be flattened to a single level
192 * 2. Keys will have their names normalized (to remove any problematic
193 * characters, such as whitespace)
194 *
195 * The nvlist_t passed into this function will duplicated and should be freed
196 * by caller.
197 *
198 */
199 static void
spa_history_log_notify(spa_t * spa,nvlist_t * nvl)200 spa_history_log_notify(spa_t *spa, nvlist_t *nvl)
201 {
202 nvlist_t *hist_nvl = fnvlist_alloc();
203 uint64_t uint64;
204 const char *string;
205
206 if (nvlist_lookup_string(nvl, ZPOOL_HIST_CMD, &string) == 0)
207 fnvlist_add_string(hist_nvl, ZFS_EV_HIST_CMD, string);
208
209 if (nvlist_lookup_string(nvl, ZPOOL_HIST_INT_NAME, &string) == 0)
210 fnvlist_add_string(hist_nvl, ZFS_EV_HIST_INT_NAME, string);
211
212 if (nvlist_lookup_string(nvl, ZPOOL_HIST_ZONE, &string) == 0)
213 fnvlist_add_string(hist_nvl, ZFS_EV_HIST_ZONE, string);
214
215 if (nvlist_lookup_string(nvl, ZPOOL_HIST_HOST, &string) == 0)
216 fnvlist_add_string(hist_nvl, ZFS_EV_HIST_HOST, string);
217
218 if (nvlist_lookup_string(nvl, ZPOOL_HIST_DSNAME, &string) == 0)
219 fnvlist_add_string(hist_nvl, ZFS_EV_HIST_DSNAME, string);
220
221 if (nvlist_lookup_string(nvl, ZPOOL_HIST_INT_STR, &string) == 0)
222 fnvlist_add_string(hist_nvl, ZFS_EV_HIST_INT_STR, string);
223
224 if (nvlist_lookup_string(nvl, ZPOOL_HIST_IOCTL, &string) == 0)
225 fnvlist_add_string(hist_nvl, ZFS_EV_HIST_IOCTL, string);
226
227 if (nvlist_lookup_string(nvl, ZPOOL_HIST_INT_NAME, &string) == 0)
228 fnvlist_add_string(hist_nvl, ZFS_EV_HIST_INT_NAME, string);
229
230 if (nvlist_lookup_uint64(nvl, ZPOOL_HIST_DSID, &uint64) == 0)
231 fnvlist_add_uint64(hist_nvl, ZFS_EV_HIST_DSID, uint64);
232
233 if (nvlist_lookup_uint64(nvl, ZPOOL_HIST_TXG, &uint64) == 0)
234 fnvlist_add_uint64(hist_nvl, ZFS_EV_HIST_TXG, uint64);
235
236 if (nvlist_lookup_uint64(nvl, ZPOOL_HIST_TIME, &uint64) == 0)
237 fnvlist_add_uint64(hist_nvl, ZFS_EV_HIST_TIME, uint64);
238
239 if (nvlist_lookup_uint64(nvl, ZPOOL_HIST_WHO, &uint64) == 0)
240 fnvlist_add_uint64(hist_nvl, ZFS_EV_HIST_WHO, uint64);
241
242 if (nvlist_lookup_uint64(nvl, ZPOOL_HIST_INT_EVENT, &uint64) == 0)
243 fnvlist_add_uint64(hist_nvl, ZFS_EV_HIST_INT_EVENT, uint64);
244
245 spa_event_notify(spa, NULL, hist_nvl, ESC_ZFS_HISTORY_EVENT);
246
247 nvlist_free(hist_nvl);
248 }
249
250 /*
251 * Write out a history event.
252 */
253 static void
spa_history_log_sync(void * arg,dmu_tx_t * tx)254 spa_history_log_sync(void *arg, dmu_tx_t *tx)
255 {
256 nvlist_t *nvl = arg;
257 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
258 objset_t *mos = spa->spa_meta_objset;
259 dmu_buf_t *dbp;
260 spa_history_phys_t *shpp;
261 size_t reclen;
262 uint64_t le_len;
263 char *record_packed = NULL;
264 int ret;
265
266 /*
267 * If we have an older pool that doesn't have a command
268 * history object, create it now.
269 */
270 mutex_enter(&spa->spa_history_lock);
271 if (!spa->spa_history)
272 spa_history_create_obj(spa, tx);
273 mutex_exit(&spa->spa_history_lock);
274
275 /*
276 * Get the offset of where we need to write via the bonus buffer.
277 * Update the offset when the write completes.
278 */
279 VERIFY0(dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp));
280 shpp = dbp->db_data;
281
282 dmu_buf_will_dirty(dbp, tx);
283
284 #ifdef ZFS_DEBUG
285 {
286 dmu_object_info_t doi;
287 dmu_object_info_from_db(dbp, &doi);
288 ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_SPA_HISTORY_OFFSETS);
289 }
290 #endif
291
292 fnvlist_add_string(nvl, ZPOOL_HIST_HOST, utsname()->nodename);
293
294 if (nvlist_exists(nvl, ZPOOL_HIST_CMD)) {
295 zfs_dbgmsg("command: %s",
296 fnvlist_lookup_string(nvl, ZPOOL_HIST_CMD));
297 } else if (nvlist_exists(nvl, ZPOOL_HIST_INT_NAME)) {
298 if (nvlist_exists(nvl, ZPOOL_HIST_DSNAME)) {
299 zfs_dbgmsg("txg %lld %s %s (id %llu) %s",
300 (longlong_t)fnvlist_lookup_uint64(nvl,
301 ZPOOL_HIST_TXG),
302 fnvlist_lookup_string(nvl, ZPOOL_HIST_INT_NAME),
303 fnvlist_lookup_string(nvl, ZPOOL_HIST_DSNAME),
304 (u_longlong_t)fnvlist_lookup_uint64(nvl,
305 ZPOOL_HIST_DSID),
306 fnvlist_lookup_string(nvl, ZPOOL_HIST_INT_STR));
307 } else {
308 zfs_dbgmsg("txg %lld %s %s",
309 (longlong_t)fnvlist_lookup_uint64(nvl,
310 ZPOOL_HIST_TXG),
311 fnvlist_lookup_string(nvl, ZPOOL_HIST_INT_NAME),
312 fnvlist_lookup_string(nvl, ZPOOL_HIST_INT_STR));
313 }
314 /*
315 * The history sysevent is posted only for internal history
316 * messages to show what has happened, not how it happened. For
317 * example, the following command:
318 *
319 * # zfs destroy -r tank/foo
320 *
321 * will result in one sysevent posted per dataset that is
322 * destroyed as a result of the command - which could be more
323 * than one event in total. By contrast, if the sysevent was
324 * posted as a result of the ZPOOL_HIST_CMD key being present
325 * it would result in only one sysevent being posted with the
326 * full command line arguments, requiring the consumer to know
327 * how to parse and understand zfs(8) command invocations.
328 */
329 spa_history_log_notify(spa, nvl);
330 } else if (nvlist_exists(nvl, ZPOOL_HIST_IOCTL)) {
331 zfs_dbgmsg("ioctl %s",
332 fnvlist_lookup_string(nvl, ZPOOL_HIST_IOCTL));
333 }
334
335 VERIFY3U(nvlist_pack(nvl, &record_packed, &reclen, NV_ENCODE_NATIVE,
336 KM_SLEEP), ==, 0);
337
338 mutex_enter(&spa->spa_history_lock);
339
340 /* write out the packed length as little endian */
341 le_len = LE_64((uint64_t)reclen);
342 ret = spa_history_write(spa, &le_len, sizeof (le_len), shpp, tx);
343 if (!ret)
344 ret = spa_history_write(spa, record_packed, reclen, shpp, tx);
345
346 /* The first command is the create, which we keep forever */
347 if (ret == 0 && shpp->sh_pool_create_len == 0 &&
348 nvlist_exists(nvl, ZPOOL_HIST_CMD)) {
349 shpp->sh_pool_create_len = shpp->sh_bof = shpp->sh_eof;
350 }
351
352 mutex_exit(&spa->spa_history_lock);
353 fnvlist_pack_free(record_packed, reclen);
354 dmu_buf_rele(dbp, FTAG);
355 fnvlist_free(nvl);
356 }
357
358 /*
359 * Write out a history event.
360 */
361 int
spa_history_log(spa_t * spa,const char * msg)362 spa_history_log(spa_t *spa, const char *msg)
363 {
364 int err;
365 nvlist_t *nvl = fnvlist_alloc();
366
367 fnvlist_add_string(nvl, ZPOOL_HIST_CMD, msg);
368 err = spa_history_log_nvl(spa, nvl);
369 fnvlist_free(nvl);
370 return (err);
371 }
372
373 int
spa_history_log_nvl(spa_t * spa,nvlist_t * nvl)374 spa_history_log_nvl(spa_t *spa, nvlist_t *nvl)
375 {
376 int err = 0;
377 dmu_tx_t *tx;
378 nvlist_t *nvarg, *in_nvl = NULL;
379
380 if (spa_version(spa) < SPA_VERSION_ZPOOL_HISTORY || !spa_writeable(spa))
381 return (SET_ERROR(EINVAL));
382
383 err = nvlist_lookup_nvlist(nvl, ZPOOL_HIST_INPUT_NVL, &in_nvl);
384 if (err == 0) {
385 (void) nvlist_remove_all(in_nvl, ZPOOL_HIDDEN_ARGS);
386 }
387
388 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
389 err = dmu_tx_assign(tx, DMU_TX_WAIT);
390 if (err) {
391 dmu_tx_abort(tx);
392 return (err);
393 }
394
395 ASSERT3UF(tx->tx_txg, <=, spa_final_dirty_txg(spa),
396 "Logged %s after final txg was set!", "nvlist");
397
398 VERIFY0(nvlist_dup(nvl, &nvarg, KM_SLEEP));
399 if (spa_history_zone() != NULL) {
400 fnvlist_add_string(nvarg, ZPOOL_HIST_ZONE,
401 spa_history_zone());
402 }
403 fnvlist_add_uint64(nvarg, ZPOOL_HIST_WHO, crgetruid(CRED()));
404
405 /*
406 * Since the history is recorded asynchronously, the effective time is
407 * now, which may be considerably before the change is made on disk.
408 */
409 fnvlist_add_uint64(nvarg, ZPOOL_HIST_TIME, gethrestime_sec());
410
411 /* Kick this off asynchronously; errors are ignored. */
412 dsl_sync_task_nowait(spa_get_dsl(spa), spa_history_log_sync, nvarg, tx);
413 dmu_tx_commit(tx);
414
415 /* spa_history_log_sync will free nvl */
416 return (err);
417 }
418
419 /*
420 * Read out the command history.
421 */
422 int
spa_history_get(spa_t * spa,uint64_t * offp,uint64_t * len,char * buf)423 spa_history_get(spa_t *spa, uint64_t *offp, uint64_t *len, char *buf)
424 {
425 objset_t *mos = spa->spa_meta_objset;
426 dmu_buf_t *dbp;
427 uint64_t read_len, phys_read_off, phys_eof;
428 uint64_t leftover = 0;
429 spa_history_phys_t *shpp;
430 int err;
431
432 /*
433 * If the command history doesn't exist (older pool),
434 * that's ok, just return ENOENT.
435 */
436 if (!spa->spa_history)
437 return (SET_ERROR(ENOENT));
438
439 /*
440 * The history is logged asynchronously, so when they request
441 * the first chunk of history, make sure everything has been
442 * synced to disk so that we get it.
443 */
444 if (*offp == 0 && spa_writeable(spa))
445 txg_wait_synced(spa_get_dsl(spa), 0);
446
447 if ((err = dmu_bonus_hold(mos, spa->spa_history, FTAG, &dbp)) != 0)
448 return (err);
449 shpp = dbp->db_data;
450
451 #ifdef ZFS_DEBUG
452 {
453 dmu_object_info_t doi;
454 dmu_object_info_from_db(dbp, &doi);
455 ASSERT3U(doi.doi_bonus_type, ==, DMU_OT_SPA_HISTORY_OFFSETS);
456 }
457 #endif
458
459 mutex_enter(&spa->spa_history_lock);
460 phys_eof = spa_history_log_to_phys(shpp->sh_eof, shpp);
461
462 if (*offp < shpp->sh_pool_create_len) {
463 /* read in just the zpool create history */
464 phys_read_off = *offp;
465 read_len = MIN(*len, shpp->sh_pool_create_len -
466 phys_read_off);
467 } else {
468 /*
469 * Need to reset passed in offset to BOF if the passed in
470 * offset has since been overwritten.
471 */
472 *offp = MAX(*offp, shpp->sh_bof);
473 phys_read_off = spa_history_log_to_phys(*offp, shpp);
474
475 /*
476 * Read up to the minimum of what the user passed down or
477 * the EOF (physical or logical). If we hit physical EOF,
478 * use 'leftover' to read from the physical BOF.
479 */
480 if (phys_read_off <= phys_eof) {
481 read_len = MIN(*len, phys_eof - phys_read_off);
482 } else {
483 read_len = MIN(*len,
484 shpp->sh_phys_max_off - phys_read_off);
485 if (phys_read_off + *len > shpp->sh_phys_max_off) {
486 leftover = MIN(*len - read_len,
487 phys_eof - shpp->sh_pool_create_len);
488 }
489 }
490 }
491
492 /* offset for consumer to use next */
493 *offp += read_len + leftover;
494
495 /* tell the consumer how much you actually read */
496 *len = read_len + leftover;
497
498 if (read_len == 0) {
499 mutex_exit(&spa->spa_history_lock);
500 dmu_buf_rele(dbp, FTAG);
501 return (0);
502 }
503
504 err = dmu_read(mos, spa->spa_history, phys_read_off, read_len, buf,
505 DMU_READ_PREFETCH);
506 if (leftover && err == 0) {
507 err = dmu_read(mos, spa->spa_history, shpp->sh_pool_create_len,
508 leftover, buf + read_len, DMU_READ_PREFETCH);
509 }
510 mutex_exit(&spa->spa_history_lock);
511
512 dmu_buf_rele(dbp, FTAG);
513 return (err);
514 }
515
516 /*
517 * The nvlist will be consumed by this call.
518 */
519 static void
log_internal(nvlist_t * nvl,const char * operation,spa_t * spa,dmu_tx_t * tx,const char * fmt,va_list adx)520 log_internal(nvlist_t *nvl, const char *operation, spa_t *spa,
521 dmu_tx_t *tx, const char *fmt, va_list adx)
522 {
523 char *msg;
524
525 /*
526 * If this is part of creating a pool, not everything is
527 * initialized yet, so don't bother logging the internal events.
528 * Likewise if the pool is not writeable.
529 */
530 if (spa_is_initializing(spa) || !spa_writeable(spa)) {
531 fnvlist_free(nvl);
532 return;
533 }
534
535 ASSERT3UF(tx->tx_txg, <=, spa_final_dirty_txg(spa),
536 "Logged after final txg was set: %s %s", operation, fmt);
537
538 msg = kmem_vasprintf(fmt, adx);
539 fnvlist_add_string(nvl, ZPOOL_HIST_INT_STR, msg);
540 kmem_strfree(msg);
541
542 fnvlist_add_string(nvl, ZPOOL_HIST_INT_NAME, operation);
543 fnvlist_add_uint64(nvl, ZPOOL_HIST_TXG, tx->tx_txg);
544 fnvlist_add_uint64(nvl, ZPOOL_HIST_TIME, gethrestime_sec());
545
546 if (dmu_tx_is_syncing(tx)) {
547 spa_history_log_sync(nvl, tx);
548 } else {
549 dsl_sync_task_nowait(spa_get_dsl(spa),
550 spa_history_log_sync, nvl, tx);
551 }
552 /* spa_history_log_sync() will free nvl */
553 }
554
555 void
spa_history_log_internal(spa_t * spa,const char * operation,dmu_tx_t * tx,const char * fmt,...)556 spa_history_log_internal(spa_t *spa, const char *operation,
557 dmu_tx_t *tx, const char *fmt, ...)
558 {
559 dmu_tx_t *htx = tx;
560 va_list adx;
561
562 /* create a tx if we didn't get one */
563 if (tx == NULL) {
564 htx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
565 if (dmu_tx_assign(htx, DMU_TX_WAIT) != 0) {
566 dmu_tx_abort(htx);
567 return;
568 }
569 }
570
571 va_start(adx, fmt);
572 log_internal(fnvlist_alloc(), operation, spa, htx, fmt, adx);
573 va_end(adx);
574
575 /* if we didn't get a tx from the caller, commit the one we made */
576 if (tx == NULL)
577 dmu_tx_commit(htx);
578 }
579
580 void
spa_history_log_internal_ds(dsl_dataset_t * ds,const char * operation,dmu_tx_t * tx,const char * fmt,...)581 spa_history_log_internal_ds(dsl_dataset_t *ds, const char *operation,
582 dmu_tx_t *tx, const char *fmt, ...)
583 {
584 va_list adx;
585 char namebuf[ZFS_MAX_DATASET_NAME_LEN];
586 nvlist_t *nvl = fnvlist_alloc();
587
588 ASSERT(tx != NULL);
589
590 dsl_dataset_name(ds, namebuf);
591 fnvlist_add_string(nvl, ZPOOL_HIST_DSNAME, namebuf);
592 fnvlist_add_uint64(nvl, ZPOOL_HIST_DSID, ds->ds_object);
593
594 va_start(adx, fmt);
595 log_internal(nvl, operation, dsl_dataset_get_spa(ds), tx, fmt, adx);
596 va_end(adx);
597 }
598
599 void
spa_history_log_internal_dd(dsl_dir_t * dd,const char * operation,dmu_tx_t * tx,const char * fmt,...)600 spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
601 dmu_tx_t *tx, const char *fmt, ...)
602 {
603 va_list adx;
604 char namebuf[ZFS_MAX_DATASET_NAME_LEN];
605 nvlist_t *nvl = fnvlist_alloc();
606
607 ASSERT(tx != NULL);
608
609 dsl_dir_name(dd, namebuf);
610 fnvlist_add_string(nvl, ZPOOL_HIST_DSNAME, namebuf);
611 fnvlist_add_uint64(nvl, ZPOOL_HIST_DSID,
612 dsl_dir_phys(dd)->dd_head_dataset_obj);
613
614 va_start(adx, fmt);
615 log_internal(nvl, operation, dd->dd_pool->dp_spa, tx, fmt, adx);
616 va_end(adx);
617 }
618
619 void
spa_history_log_version(spa_t * spa,const char * operation,dmu_tx_t * tx)620 spa_history_log_version(spa_t *spa, const char *operation, dmu_tx_t *tx)
621 {
622 utsname_t *u = utsname();
623
624 spa_history_log_internal(spa, operation, tx,
625 "pool version %llu; software version %s; uts %s %s %s %s",
626 (u_longlong_t)spa_version(spa), ZFS_META_GITREV,
627 u->nodename, u->release, u->version, u->machine);
628 }
629
630 #ifndef _KERNEL
631 const char *
spa_history_zone(void)632 spa_history_zone(void)
633 {
634 return (NULL);
635 }
636 #endif
637
638 #if defined(_KERNEL)
639 EXPORT_SYMBOL(spa_history_create_obj);
640 EXPORT_SYMBOL(spa_history_get);
641 EXPORT_SYMBOL(spa_history_log);
642 EXPORT_SYMBOL(spa_history_log_internal);
643 EXPORT_SYMBOL(spa_history_log_version);
644 #endif
645