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