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4757 ZFS embedded-data block pointers ("zero block compression")
[unleashed.git] / usr / src / cmd / ztest / ztest.c
blobd4dac71db82217167c6e5a97932edf2ef7725397
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2013 by Delphix. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2013 Steven Hartland. All rights reserved.
26 */
27
28 /*
29 * The objective of this program is to provide a DMU/ZAP/SPA stress test
30 * that runs entirely in userland, is easy to use, and easy to extend.
31 *
32 * The overall design of the ztest program is as follows:
33 *
34 * (1) For each major functional area (e.g. adding vdevs to a pool,
35 * creating and destroying datasets, reading and writing objects, etc)
36 * we have a simple routine to test that functionality. These
37 * individual routines do not have to do anything "stressful".
38 *
39 * (2) We turn these simple functionality tests into a stress test by
40 * running them all in parallel, with as many threads as desired,
41 * and spread across as many datasets, objects, and vdevs as desired.
42 *
43 * (3) While all this is happening, we inject faults into the pool to
44 * verify that self-healing data really works.
45 *
46 * (4) Every time we open a dataset, we change its checksum and compression
47 * functions. Thus even individual objects vary from block to block
48 * in which checksum they use and whether they're compressed.
49 *
50 * (5) To verify that we never lose on-disk consistency after a crash,
51 * we run the entire test in a child of the main process.
52 * At random times, the child self-immolates with a SIGKILL.
53 * This is the software equivalent of pulling the power cord.
54 * The parent then runs the test again, using the existing
55 * storage pool, as many times as desired. If backwards compatibility
56 * testing is enabled ztest will sometimes run the "older" version
57 * of ztest after a SIGKILL.
58 *
59 * (6) To verify that we don't have future leaks or temporal incursions,
60 * many of the functional tests record the transaction group number
61 * as part of their data. When reading old data, they verify that
62 * the transaction group number is less than the current, open txg.
63 * If you add a new test, please do this if applicable.
64 *
65 * When run with no arguments, ztest runs for about five minutes and
66 * produces no output if successful. To get a little bit of information,
67 * specify -V. To get more information, specify -VV, and so on.
68 *
69 * To turn this into an overnight stress test, use -T to specify run time.
70 *
71 * You can ask more more vdevs [-v], datasets [-d], or threads [-t]
72 * to increase the pool capacity, fanout, and overall stress level.
73 *
74 * Use the -k option to set the desired frequency of kills.
75 *
76 * When ztest invokes itself it passes all relevant information through a
77 * temporary file which is mmap-ed in the child process. This allows shared
78 * memory to survive the exec syscall. The ztest_shared_hdr_t struct is always
79 * stored at offset 0 of this file and contains information on the size and
80 * number of shared structures in the file. The information stored in this file
81 * must remain backwards compatible with older versions of ztest so that
82 * ztest can invoke them during backwards compatibility testing (-B).
83 */
84
85 #include <sys/zfs_context.h>
86 #include <sys/spa.h>
87 #include <sys/dmu.h>
88 #include <sys/txg.h>
89 #include <sys/dbuf.h>
90 #include <sys/zap.h>
91 #include <sys/dmu_objset.h>
92 #include <sys/poll.h>
93 #include <sys/stat.h>
94 #include <sys/time.h>
95 #include <sys/wait.h>
96 #include <sys/mman.h>
97 #include <sys/resource.h>
98 #include <sys/zio.h>
99 #include <sys/zil.h>
100 #include <sys/zil_impl.h>
101 #include <sys/vdev_impl.h>
102 #include <sys/vdev_file.h>
103 #include <sys/spa_impl.h>
104 #include <sys/metaslab_impl.h>
105 #include <sys/dsl_prop.h>
106 #include <sys/dsl_dataset.h>
107 #include <sys/dsl_destroy.h>
108 #include <sys/dsl_scan.h>
109 #include <sys/zio_checksum.h>
110 #include <sys/refcount.h>
111 #include <sys/zfeature.h>
112 #include <sys/dsl_userhold.h>
113 #include <stdio.h>
114 #include <stdio_ext.h>
115 #include <stdlib.h>
116 #include <unistd.h>
117 #include <signal.h>
118 #include <umem.h>
119 #include <dlfcn.h>
120 #include <ctype.h>
121 #include <math.h>
122 #include <sys/fs/zfs.h>
123 #include <libnvpair.h>
124
125 static int ztest_fd_data = -1;
126 static int ztest_fd_rand = -1;
127
128 typedef struct ztest_shared_hdr {
129 uint64_t zh_hdr_size;
130 uint64_t zh_opts_size;
131 uint64_t zh_size;
132 uint64_t zh_stats_size;
133 uint64_t zh_stats_count;
134 uint64_t zh_ds_size;
135 uint64_t zh_ds_count;
136 } ztest_shared_hdr_t;
137
138 static ztest_shared_hdr_t *ztest_shared_hdr;
139
140 typedef struct ztest_shared_opts {
141 char zo_pool[MAXNAMELEN];
142 char zo_dir[MAXNAMELEN];
143 char zo_alt_ztest[MAXNAMELEN];
144 char zo_alt_libpath[MAXNAMELEN];
145 uint64_t zo_vdevs;
146 uint64_t zo_vdevtime;
147 size_t zo_vdev_size;
148 int zo_ashift;
149 int zo_mirrors;
150 int zo_raidz;
151 int zo_raidz_parity;
152 int zo_datasets;
153 int zo_threads;
154 uint64_t zo_passtime;
155 uint64_t zo_killrate;
156 int zo_verbose;
157 int zo_init;
158 uint64_t zo_time;
159 uint64_t zo_maxloops;
160 uint64_t zo_metaslab_gang_bang;
161 } ztest_shared_opts_t;
162
163 static const ztest_shared_opts_t ztest_opts_defaults = {
164 .zo_pool = { 'z', 't', 'e', 's', 't', '\0' },
165 .zo_dir = { '/', 't', 'm', 'p', '\0' },
166 .zo_alt_ztest = { '\0' },
167 .zo_alt_libpath = { '\0' },
168 .zo_vdevs = 5,
169 .zo_ashift = SPA_MINBLOCKSHIFT,
170 .zo_mirrors = 2,
171 .zo_raidz = 4,
172 .zo_raidz_parity = 1,
173 .zo_vdev_size = SPA_MINDEVSIZE,
174 .zo_datasets = 7,
175 .zo_threads = 23,
176 .zo_passtime = 60, /* 60 seconds */
177 .zo_killrate = 70, /* 70% kill rate */
178 .zo_verbose = 0,
179 .zo_init = 1,
180 .zo_time = 300, /* 5 minutes */
181 .zo_maxloops = 50, /* max loops during spa_freeze() */
182 .zo_metaslab_gang_bang = 32 << 10
183 };
184
185 extern uint64_t metaslab_gang_bang;
186 extern uint64_t metaslab_df_alloc_threshold;
187 extern uint64_t zfs_deadman_synctime_ms;
188
189 static ztest_shared_opts_t *ztest_shared_opts;
190 static ztest_shared_opts_t ztest_opts;
191
192 typedef struct ztest_shared_ds {
193 uint64_t zd_seq;
194 } ztest_shared_ds_t;
195
196 static ztest_shared_ds_t *ztest_shared_ds;
197 #define ZTEST_GET_SHARED_DS(d) (&ztest_shared_ds[d])
198
199 #define BT_MAGIC 0x123456789abcdefULL
200 #define MAXFAULTS() \
201 (MAX(zs->zs_mirrors, 1) * (ztest_opts.zo_raidz_parity + 1) - 1)
202
203 enum ztest_io_type {
204 ZTEST_IO_WRITE_TAG,
205 ZTEST_IO_WRITE_PATTERN,
206 ZTEST_IO_WRITE_ZEROES,
207 ZTEST_IO_TRUNCATE,
208 ZTEST_IO_SETATTR,
209 ZTEST_IO_REWRITE,
210 ZTEST_IO_TYPES
211 };
212
213 typedef struct ztest_block_tag {
214 uint64_t bt_magic;
215 uint64_t bt_objset;
216 uint64_t bt_object;
217 uint64_t bt_offset;
218 uint64_t bt_gen;
219 uint64_t bt_txg;
220 uint64_t bt_crtxg;
221 } ztest_block_tag_t;
222
223 typedef struct bufwad {
224 uint64_t bw_index;
225 uint64_t bw_txg;
226 uint64_t bw_data;
227 } bufwad_t;
228
229 /*
230 * XXX -- fix zfs range locks to be generic so we can use them here.
231 */
232 typedef enum {
233 RL_READER,
234 RL_WRITER,
235 RL_APPEND
236 } rl_type_t;
237
238 typedef struct rll {
239 void *rll_writer;
240 int rll_readers;
241 mutex_t rll_lock;
242 cond_t rll_cv;
243 } rll_t;
244
245 typedef struct rl {
246 uint64_t rl_object;
247 uint64_t rl_offset;
248 uint64_t rl_size;
249 rll_t *rl_lock;
250 } rl_t;
251
252 #define ZTEST_RANGE_LOCKS 64
253 #define ZTEST_OBJECT_LOCKS 64
254
255 /*
256 * Object descriptor. Used as a template for object lookup/create/remove.
257 */
258 typedef struct ztest_od {
259 uint64_t od_dir;
260 uint64_t od_object;
261 dmu_object_type_t od_type;
262 dmu_object_type_t od_crtype;
263 uint64_t od_blocksize;
264 uint64_t od_crblocksize;
265 uint64_t od_gen;
266 uint64_t od_crgen;
267 char od_name[MAXNAMELEN];
268 } ztest_od_t;
269
270 /*
271 * Per-dataset state.
272 */
273 typedef struct ztest_ds {
274 ztest_shared_ds_t *zd_shared;
275 objset_t *zd_os;
276 rwlock_t zd_zilog_lock;
277 zilog_t *zd_zilog;
278 ztest_od_t *zd_od; /* debugging aid */
279 char zd_name[MAXNAMELEN];
280 mutex_t zd_dirobj_lock;
281 rll_t zd_object_lock[ZTEST_OBJECT_LOCKS];
282 rll_t zd_range_lock[ZTEST_RANGE_LOCKS];
283 } ztest_ds_t;
284
285 /*
286 * Per-iteration state.
287 */
288 typedef void ztest_func_t(ztest_ds_t *zd, uint64_t id);
289
290 typedef struct ztest_info {
291 ztest_func_t *zi_func; /* test function */
292 uint64_t zi_iters; /* iterations per execution */
293 uint64_t *zi_interval; /* execute every <interval> seconds */
294 } ztest_info_t;
295
296 typedef struct ztest_shared_callstate {
297 uint64_t zc_count; /* per-pass count */
298 uint64_t zc_time; /* per-pass time */
299 uint64_t zc_next; /* next time to call this function */
300 } ztest_shared_callstate_t;
301
302 static ztest_shared_callstate_t *ztest_shared_callstate;
303 #define ZTEST_GET_SHARED_CALLSTATE(c) (&ztest_shared_callstate[c])
304
305 /*
306 * Note: these aren't static because we want dladdr() to work.
307 */
308 ztest_func_t ztest_dmu_read_write;
309 ztest_func_t ztest_dmu_write_parallel;
310 ztest_func_t ztest_dmu_object_alloc_free;
311 ztest_func_t ztest_dmu_commit_callbacks;
312 ztest_func_t ztest_zap;
313 ztest_func_t ztest_zap_parallel;
314 ztest_func_t ztest_zil_commit;
315 ztest_func_t ztest_zil_remount;
316 ztest_func_t ztest_dmu_read_write_zcopy;
317 ztest_func_t ztest_dmu_objset_create_destroy;
318 ztest_func_t ztest_dmu_prealloc;
319 ztest_func_t ztest_fzap;
320 ztest_func_t ztest_dmu_snapshot_create_destroy;
321 ztest_func_t ztest_dsl_prop_get_set;
322 ztest_func_t ztest_spa_prop_get_set;
323 ztest_func_t ztest_spa_create_destroy;
324 ztest_func_t ztest_fault_inject;
325 ztest_func_t ztest_ddt_repair;
326 ztest_func_t ztest_dmu_snapshot_hold;
327 ztest_func_t ztest_spa_rename;
328 ztest_func_t ztest_scrub;
329 ztest_func_t ztest_dsl_dataset_promote_busy;
330 ztest_func_t ztest_vdev_attach_detach;
331 ztest_func_t ztest_vdev_LUN_growth;
332 ztest_func_t ztest_vdev_add_remove;
333 ztest_func_t ztest_vdev_aux_add_remove;
334 ztest_func_t ztest_split_pool;
335 ztest_func_t ztest_reguid;
336 ztest_func_t ztest_spa_upgrade;
337
338 uint64_t zopt_always = 0ULL * NANOSEC; /* all the time */
339 uint64_t zopt_incessant = 1ULL * NANOSEC / 10; /* every 1/10 second */
340 uint64_t zopt_often = 1ULL * NANOSEC; /* every second */
341 uint64_t zopt_sometimes = 10ULL * NANOSEC; /* every 10 seconds */
342 uint64_t zopt_rarely = 60ULL * NANOSEC; /* every 60 seconds */
343
344 ztest_info_t ztest_info[] = {
345 { ztest_dmu_read_write, 1, &zopt_always },
346 { ztest_dmu_write_parallel, 10, &zopt_always },
347 { ztest_dmu_object_alloc_free, 1, &zopt_always },
348 { ztest_dmu_commit_callbacks, 1, &zopt_always },
349 { ztest_zap, 30, &zopt_always },
350 { ztest_zap_parallel, 100, &zopt_always },
351 { ztest_split_pool, 1, &zopt_always },
352 { ztest_zil_commit, 1, &zopt_incessant },
353 { ztest_zil_remount, 1, &zopt_sometimes },
354 { ztest_dmu_read_write_zcopy, 1, &zopt_often },
355 { ztest_dmu_objset_create_destroy, 1, &zopt_often },
356 { ztest_dsl_prop_get_set, 1, &zopt_often },
357 { ztest_spa_prop_get_set, 1, &zopt_sometimes },
358 #if 0
359 { ztest_dmu_prealloc, 1, &zopt_sometimes },
360 #endif
361 { ztest_fzap, 1, &zopt_sometimes },
362 { ztest_dmu_snapshot_create_destroy, 1, &zopt_sometimes },
363 { ztest_spa_create_destroy, 1, &zopt_sometimes },
364 { ztest_fault_inject, 1, &zopt_sometimes },
365 { ztest_ddt_repair, 1, &zopt_sometimes },
366 { ztest_dmu_snapshot_hold, 1, &zopt_sometimes },
367 { ztest_reguid, 1, &zopt_rarely },
368 { ztest_spa_rename, 1, &zopt_rarely },
369 { ztest_scrub, 1, &zopt_rarely },
370 { ztest_spa_upgrade, 1, &zopt_rarely },
371 { ztest_dsl_dataset_promote_busy, 1, &zopt_rarely },
372 { ztest_vdev_attach_detach, 1, &zopt_sometimes },
373 { ztest_vdev_LUN_growth, 1, &zopt_rarely },
374 { ztest_vdev_add_remove, 1,
375 &ztest_opts.zo_vdevtime },
376 { ztest_vdev_aux_add_remove, 1,
377 &ztest_opts.zo_vdevtime },
378 };
379
380 #define ZTEST_FUNCS (sizeof (ztest_info) / sizeof (ztest_info_t))
381
382 /*
383 * The following struct is used to hold a list of uncalled commit callbacks.
384 * The callbacks are ordered by txg number.
385 */
386 typedef struct ztest_cb_list {
387 mutex_t zcl_callbacks_lock;
388 list_t zcl_callbacks;
389 } ztest_cb_list_t;
390
391 /*
392 * Stuff we need to share writably between parent and child.
393 */
394 typedef struct ztest_shared {
395 boolean_t zs_do_init;
396 hrtime_t zs_proc_start;
397 hrtime_t zs_proc_stop;
398 hrtime_t zs_thread_start;
399 hrtime_t zs_thread_stop;
400 hrtime_t zs_thread_kill;
401 uint64_t zs_enospc_count;
402 uint64_t zs_vdev_next_leaf;
403 uint64_t zs_vdev_aux;
404 uint64_t zs_alloc;
405 uint64_t zs_space;
406 uint64_t zs_splits;
407 uint64_t zs_mirrors;
408 uint64_t zs_metaslab_sz;
409 uint64_t zs_metaslab_df_alloc_threshold;
410 uint64_t zs_guid;
411 } ztest_shared_t;
412
413 #define ID_PARALLEL -1ULL
414
415 static char ztest_dev_template[] = "%s/%s.%llua";
416 static char ztest_aux_template[] = "%s/%s.%s.%llu";
417 ztest_shared_t *ztest_shared;
418
419 static spa_t *ztest_spa = NULL;
420 static ztest_ds_t *ztest_ds;
421
422 static mutex_t ztest_vdev_lock;
423
424 /*
425 * The ztest_name_lock protects the pool and dataset namespace used by
426 * the individual tests. To modify the namespace, consumers must grab
427 * this lock as writer. Grabbing the lock as reader will ensure that the
428 * namespace does not change while the lock is held.
429 */
430 static rwlock_t ztest_name_lock;
431
432 static boolean_t ztest_dump_core = B_TRUE;
433 static boolean_t ztest_exiting;
434
435 /* Global commit callback list */
436 static ztest_cb_list_t zcl;
437
438 enum ztest_object {
439 ZTEST_META_DNODE = 0,
440 ZTEST_DIROBJ,
441 ZTEST_OBJECTS
442 };
443
444 static void usage(boolean_t) __NORETURN;
445
446 /*
447 * These libumem hooks provide a reasonable set of defaults for the allocator's
448 * debugging facilities.
449 */
450 const char *
451 _umem_debug_init()
452 {
453 return ("default,verbose"); /* $UMEM_DEBUG setting */
454 }
455
456 const char *
457 _umem_logging_init(void)
458 {
459 return ("fail,contents"); /* $UMEM_LOGGING setting */
460 }
461
462 #define FATAL_MSG_SZ 1024
463
464 char *fatal_msg;
465
466 static void
467 fatal(int do_perror, char *message, ...)
468 {
469 va_list args;
470 int save_errno = errno;
471 char buf[FATAL_MSG_SZ];
472
473 (void) fflush(stdout);
474
475 va_start(args, message);
476 (void) sprintf(buf, "ztest: ");
477 /* LINTED */
478 (void) vsprintf(buf + strlen(buf), message, args);
479 va_end(args);
480 if (do_perror) {
481 (void) snprintf(buf + strlen(buf), FATAL_MSG_SZ - strlen(buf),
482 ": %s", strerror(save_errno));
483 }
484 (void) fprintf(stderr, "%s\n", buf);
485 fatal_msg = buf; /* to ease debugging */
486 if (ztest_dump_core)
487 abort();
488 exit(3);
489 }
490
491 static int
492 str2shift(const char *buf)
493 {
494 const char *ends = "BKMGTPEZ";
495 int i;
496
497 if (buf[0] == '\0')
498 return (0);
499 for (i = 0; i < strlen(ends); i++) {
500 if (toupper(buf[0]) == ends[i])
501 break;
502 }
503 if (i == strlen(ends)) {
504 (void) fprintf(stderr, "ztest: invalid bytes suffix: %s\n",
505 buf);
506 usage(B_FALSE);
507 }
508 if (buf[1] == '\0' || (toupper(buf[1]) == 'B' && buf[2] == '\0')) {
509 return (10*i);
510 }
511 (void) fprintf(stderr, "ztest: invalid bytes suffix: %s\n", buf);
512 usage(B_FALSE);
513 /* NOTREACHED */
514 }
515
516 static uint64_t
517 nicenumtoull(const char *buf)
518 {
519 char *end;
520 uint64_t val;
521
522 val = strtoull(buf, &end, 0);
523 if (end == buf) {
524 (void) fprintf(stderr, "ztest: bad numeric value: %s\n", buf);
525 usage(B_FALSE);
526 } else if (end[0] == '.') {
527 double fval = strtod(buf, &end);
528 fval *= pow(2, str2shift(end));
529 if (fval > UINT64_MAX) {
530 (void) fprintf(stderr, "ztest: value too large: %s\n",
531 buf);
532 usage(B_FALSE);
533 }
534 val = (uint64_t)fval;
535 } else {
536 int shift = str2shift(end);
537 if (shift >= 64 || (val << shift) >> shift != val) {
538 (void) fprintf(stderr, "ztest: value too large: %s\n",
539 buf);
540 usage(B_FALSE);
541 }
542 val <<= shift;
543 }
544 return (val);
545 }
546
547 static void
548 usage(boolean_t requested)
549 {
550 const ztest_shared_opts_t *zo = &ztest_opts_defaults;
551
552 char nice_vdev_size[10];
553 char nice_gang_bang[10];
554 FILE *fp = requested ? stdout : stderr;
555
556 nicenum(zo->zo_vdev_size, nice_vdev_size);
557 nicenum(zo->zo_metaslab_gang_bang, nice_gang_bang);
558
559 (void) fprintf(fp, "Usage: %s\n"
560 "\t[-v vdevs (default: %llu)]\n"
561 "\t[-s size_of_each_vdev (default: %s)]\n"
562 "\t[-a alignment_shift (default: %d)] use 0 for random\n"
563 "\t[-m mirror_copies (default: %d)]\n"
564 "\t[-r raidz_disks (default: %d)]\n"
565 "\t[-R raidz_parity (default: %d)]\n"
566 "\t[-d datasets (default: %d)]\n"
567 "\t[-t threads (default: %d)]\n"
568 "\t[-g gang_block_threshold (default: %s)]\n"
569 "\t[-i init_count (default: %d)] initialize pool i times\n"
570 "\t[-k kill_percentage (default: %llu%%)]\n"
571 "\t[-p pool_name (default: %s)]\n"
572 "\t[-f dir (default: %s)] file directory for vdev files\n"
573 "\t[-V] verbose (use multiple times for ever more blather)\n"
574 "\t[-E] use existing pool instead of creating new one\n"
575 "\t[-T time (default: %llu sec)] total run time\n"
576 "\t[-F freezeloops (default: %llu)] max loops in spa_freeze()\n"
577 "\t[-P passtime (default: %llu sec)] time per pass\n"
578 "\t[-B alt_ztest (default: <none>)] alternate ztest path\n"
579 "\t[-h] (print help)\n"
580 "",
581 zo->zo_pool,
582 (u_longlong_t)zo->zo_vdevs, /* -v */
583 nice_vdev_size, /* -s */
584 zo->zo_ashift, /* -a */
585 zo->zo_mirrors, /* -m */
586 zo->zo_raidz, /* -r */
587 zo->zo_raidz_parity, /* -R */
588 zo->zo_datasets, /* -d */
589 zo->zo_threads, /* -t */
590 nice_gang_bang, /* -g */
591 zo->zo_init, /* -i */
592 (u_longlong_t)zo->zo_killrate, /* -k */
593 zo->zo_pool, /* -p */
594 zo->zo_dir, /* -f */
595 (u_longlong_t)zo->zo_time, /* -T */
596 (u_longlong_t)zo->zo_maxloops, /* -F */
597 (u_longlong_t)zo->zo_passtime);
598 exit(requested ? 0 : 1);
599 }
600
601 static void
602 process_options(int argc, char **argv)
603 {
604 char *path;
605 ztest_shared_opts_t *zo = &ztest_opts;
606
607 int opt;
608 uint64_t value;
609 char altdir[MAXNAMELEN] = { 0 };
610
611 bcopy(&ztest_opts_defaults, zo, sizeof (*zo));
612
613 while ((opt = getopt(argc, argv,
614 "v:s:a:m:r:R:d:t:g:i:k:p:f:VET:P:hF:B:")) != EOF) {
615 value = 0;
616 switch (opt) {
617 case 'v':
618 case 's':
619 case 'a':
620 case 'm':
621 case 'r':
622 case 'R':
623 case 'd':
624 case 't':
625 case 'g':
626 case 'i':
627 case 'k':
628 case 'T':
629 case 'P':
630 case 'F':
631 value = nicenumtoull(optarg);
632 }
633 switch (opt) {
634 case 'v':
635 zo->zo_vdevs = value;
636 break;
637 case 's':
638 zo->zo_vdev_size = MAX(SPA_MINDEVSIZE, value);
639 break;
640 case 'a':
641 zo->zo_ashift = value;
642 break;
643 case 'm':
644 zo->zo_mirrors = value;
645 break;
646 case 'r':
647 zo->zo_raidz = MAX(1, value);
648 break;
649 case 'R':
650 zo->zo_raidz_parity = MIN(MAX(value, 1), 3);
651 break;
652 case 'd':
653 zo->zo_datasets = MAX(1, value);
654 break;
655 case 't':
656 zo->zo_threads = MAX(1, value);
657 break;
658 case 'g':
659 zo->zo_metaslab_gang_bang = MAX(SPA_MINBLOCKSIZE << 1,
660 value);
661 break;
662 case 'i':
663 zo->zo_init = value;
664 break;
665 case 'k':
666 zo->zo_killrate = value;
667 break;
668 case 'p':
669 (void) strlcpy(zo->zo_pool, optarg,
670 sizeof (zo->zo_pool));
671 break;
672 case 'f':
673 path = realpath(optarg, NULL);
674 if (path == NULL) {
675 (void) fprintf(stderr, "error: %s: %s\n",
676 optarg, strerror(errno));
677 usage(B_FALSE);
678 } else {
679 (void) strlcpy(zo->zo_dir, path,
680 sizeof (zo->zo_dir));
681 }
682 break;
683 case 'V':
684 zo->zo_verbose++;
685 break;
686 case 'E':
687 zo->zo_init = 0;
688 break;
689 case 'T':
690 zo->zo_time = value;
691 break;
692 case 'P':
693 zo->zo_passtime = MAX(1, value);
694 break;
695 case 'F':
696 zo->zo_maxloops = MAX(1, value);
697 break;
698 case 'B':
699 (void) strlcpy(altdir, optarg, sizeof (altdir));
700 break;
701 case 'h':
702 usage(B_TRUE);
703 break;
704 case '?':
705 default:
706 usage(B_FALSE);
707 break;
708 }
709 }
710
711 zo->zo_raidz_parity = MIN(zo->zo_raidz_parity, zo->zo_raidz - 1);
712
713 zo->zo_vdevtime =
714 (zo->zo_vdevs > 0 ? zo->zo_time * NANOSEC / zo->zo_vdevs :
715 UINT64_MAX >> 2);
716
717 if (strlen(altdir) > 0) {
718 char *cmd;
719 char *realaltdir;
720 char *bin;
721 char *ztest;
722 char *isa;
723 int isalen;
724
725 cmd = umem_alloc(MAXPATHLEN, UMEM_NOFAIL);
726 realaltdir = umem_alloc(MAXPATHLEN, UMEM_NOFAIL);
727
728 VERIFY(NULL != realpath(getexecname(), cmd));
729 if (0 != access(altdir, F_OK)) {
730 ztest_dump_core = B_FALSE;
731 fatal(B_TRUE, "invalid alternate ztest path: %s",
732 altdir);
733 }
734 VERIFY(NULL != realpath(altdir, realaltdir));
735
736 /*
737 * 'cmd' should be of the form "<anything>/usr/bin/<isa>/ztest".
738 * We want to extract <isa> to determine if we should use
739 * 32 or 64 bit binaries.
740 */
741 bin = strstr(cmd, "/usr/bin/");
742 ztest = strstr(bin, "/ztest");
743 isa = bin + 9;
744 isalen = ztest - isa;
745 (void) snprintf(zo->zo_alt_ztest, sizeof (zo->zo_alt_ztest),
746 "%s/usr/bin/%.*s/ztest", realaltdir, isalen, isa);
747 (void) snprintf(zo->zo_alt_libpath, sizeof (zo->zo_alt_libpath),
748 "%s/usr/lib/%.*s", realaltdir, isalen, isa);
749
750 if (0 != access(zo->zo_alt_ztest, X_OK)) {
751 ztest_dump_core = B_FALSE;
752 fatal(B_TRUE, "invalid alternate ztest: %s",
753 zo->zo_alt_ztest);
754 } else if (0 != access(zo->zo_alt_libpath, X_OK)) {
755 ztest_dump_core = B_FALSE;
756 fatal(B_TRUE, "invalid alternate lib directory %s",
757 zo->zo_alt_libpath);
758 }
759
760 umem_free(cmd, MAXPATHLEN);
761 umem_free(realaltdir, MAXPATHLEN);
762 }
763 }
764
765 static void
766 ztest_kill(ztest_shared_t *zs)
767 {
768 zs->zs_alloc = metaslab_class_get_alloc(spa_normal_class(ztest_spa));
769 zs->zs_space = metaslab_class_get_space(spa_normal_class(ztest_spa));
770
771 /*
772 * Before we kill off ztest, make sure that the config is updated.
773 * See comment above spa_config_sync().
774 */
775 mutex_enter(&spa_namespace_lock);
776 spa_config_sync(ztest_spa, B_FALSE, B_FALSE);
777 mutex_exit(&spa_namespace_lock);
778
779 zfs_dbgmsg_print(FTAG);
780 (void) kill(getpid(), SIGKILL);
781 }
782
783 static uint64_t
784 ztest_random(uint64_t range)
785 {
786 uint64_t r;
787
788 ASSERT3S(ztest_fd_rand, >=, 0);
789
790 if (range == 0)
791 return (0);
792
793 if (read(ztest_fd_rand, &r, sizeof (r)) != sizeof (r))
794 fatal(1, "short read from /dev/urandom");
795
796 return (r % range);
797 }
798
799 /* ARGSUSED */
800 static void
801 ztest_record_enospc(const char *s)
802 {
803 ztest_shared->zs_enospc_count++;
804 }
805
806 static uint64_t
807 ztest_get_ashift(void)
808 {
809 if (ztest_opts.zo_ashift == 0)
810 return (SPA_MINBLOCKSHIFT + ztest_random(3));
811 return (ztest_opts.zo_ashift);
812 }
813
814 static nvlist_t *
815 make_vdev_file(char *path, char *aux, char *pool, size_t size, uint64_t ashift)
816 {
817 char pathbuf[MAXPATHLEN];
818 uint64_t vdev;
819 nvlist_t *file;
820
821 if (ashift == 0)
822 ashift = ztest_get_ashift();
823
824 if (path == NULL) {
825 path = pathbuf;
826
827 if (aux != NULL) {
828 vdev = ztest_shared->zs_vdev_aux;
829 (void) snprintf(path, sizeof (pathbuf),
830 ztest_aux_template, ztest_opts.zo_dir,
831 pool == NULL ? ztest_opts.zo_pool : pool,
832 aux, vdev);
833 } else {
834 vdev = ztest_shared->zs_vdev_next_leaf++;
835 (void) snprintf(path, sizeof (pathbuf),
836 ztest_dev_template, ztest_opts.zo_dir,
837 pool == NULL ? ztest_opts.zo_pool : pool, vdev);
838 }
839 }
840
841 if (size != 0) {
842 int fd = open(path, O_RDWR | O_CREAT | O_TRUNC, 0666);
843 if (fd == -1)
844 fatal(1, "can't open %s", path);
845 if (ftruncate(fd, size) != 0)
846 fatal(1, "can't ftruncate %s", path);
847 (void) close(fd);
848 }
849
850 VERIFY(nvlist_alloc(&file, NV_UNIQUE_NAME, 0) == 0);
851 VERIFY(nvlist_add_string(file, ZPOOL_CONFIG_TYPE, VDEV_TYPE_FILE) == 0);
852 VERIFY(nvlist_add_string(file, ZPOOL_CONFIG_PATH, path) == 0);
853 VERIFY(nvlist_add_uint64(file, ZPOOL_CONFIG_ASHIFT, ashift) == 0);
854
855 return (file);
856 }
857
858 static nvlist_t *
859 make_vdev_raidz(char *path, char *aux, char *pool, size_t size,
860 uint64_t ashift, int r)
861 {
862 nvlist_t *raidz, **child;
863 int c;
864
865 if (r < 2)
866 return (make_vdev_file(path, aux, pool, size, ashift));
867 child = umem_alloc(r * sizeof (nvlist_t *), UMEM_NOFAIL);
868
869 for (c = 0; c < r; c++)
870 child[c] = make_vdev_file(path, aux, pool, size, ashift);
871
872 VERIFY(nvlist_alloc(&raidz, NV_UNIQUE_NAME, 0) == 0);
873 VERIFY(nvlist_add_string(raidz, ZPOOL_CONFIG_TYPE,
874 VDEV_TYPE_RAIDZ) == 0);
875 VERIFY(nvlist_add_uint64(raidz, ZPOOL_CONFIG_NPARITY,
876 ztest_opts.zo_raidz_parity) == 0);
877 VERIFY(nvlist_add_nvlist_array(raidz, ZPOOL_CONFIG_CHILDREN,
878 child, r) == 0);
879
880 for (c = 0; c < r; c++)
881 nvlist_free(child[c]);
882
883 umem_free(child, r * sizeof (nvlist_t *));
884
885 return (raidz);
886 }
887
888 static nvlist_t *
889 make_vdev_mirror(char *path, char *aux, char *pool, size_t size,
890 uint64_t ashift, int r, int m)
891 {
892 nvlist_t *mirror, **child;
893 int c;
894
895 if (m < 1)
896 return (make_vdev_raidz(path, aux, pool, size, ashift, r));
897
898 child = umem_alloc(m * sizeof (nvlist_t *), UMEM_NOFAIL);
899
900 for (c = 0; c < m; c++)
901 child[c] = make_vdev_raidz(path, aux, pool, size, ashift, r);
902
903 VERIFY(nvlist_alloc(&mirror, NV_UNIQUE_NAME, 0) == 0);
904 VERIFY(nvlist_add_string(mirror, ZPOOL_CONFIG_TYPE,
905 VDEV_TYPE_MIRROR) == 0);
906 VERIFY(nvlist_add_nvlist_array(mirror, ZPOOL_CONFIG_CHILDREN,
907 child, m) == 0);
908
909 for (c = 0; c < m; c++)
910 nvlist_free(child[c]);
911
912 umem_free(child, m * sizeof (nvlist_t *));
913
914 return (mirror);
915 }
916
917 static nvlist_t *
918 make_vdev_root(char *path, char *aux, char *pool, size_t size, uint64_t ashift,
919 int log, int r, int m, int t)
920 {
921 nvlist_t *root, **child;
922 int c;
923
924 ASSERT(t > 0);
925
926 child = umem_alloc(t * sizeof (nvlist_t *), UMEM_NOFAIL);
927
928 for (c = 0; c < t; c++) {
929 child[c] = make_vdev_mirror(path, aux, pool, size, ashift,
930 r, m);
931 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
932 log) == 0);
933 }
934
935 VERIFY(nvlist_alloc(&root, NV_UNIQUE_NAME, 0) == 0);
936 VERIFY(nvlist_add_string(root, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT) == 0);
937 VERIFY(nvlist_add_nvlist_array(root, aux ? aux : ZPOOL_CONFIG_CHILDREN,
938 child, t) == 0);
939
940 for (c = 0; c < t; c++)
941 nvlist_free(child[c]);
942
943 umem_free(child, t * sizeof (nvlist_t *));
944
945 return (root);
946 }
947
948 /*
949 * Find a random spa version. Returns back a random spa version in the
950 * range [initial_version, SPA_VERSION_FEATURES].
951 */
952 static uint64_t
953 ztest_random_spa_version(uint64_t initial_version)
954 {
955 uint64_t version = initial_version;
956
957 if (version <= SPA_VERSION_BEFORE_FEATURES) {
958 version = version +
959 ztest_random(SPA_VERSION_BEFORE_FEATURES - version + 1);
960 }
961
962 if (version > SPA_VERSION_BEFORE_FEATURES)
963 version = SPA_VERSION_FEATURES;
964
965 ASSERT(SPA_VERSION_IS_SUPPORTED(version));
966 return (version);
967 }
968
969 static int
970 ztest_random_blocksize(void)
971 {
972 return (1 << (SPA_MINBLOCKSHIFT +
973 ztest_random(SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)));
974 }
975
976 static int
977 ztest_random_ibshift(void)
978 {
979 return (DN_MIN_INDBLKSHIFT +
980 ztest_random(DN_MAX_INDBLKSHIFT - DN_MIN_INDBLKSHIFT + 1));
981 }
982
983 static uint64_t
984 ztest_random_vdev_top(spa_t *spa, boolean_t log_ok)
985 {
986 uint64_t top;
987 vdev_t *rvd = spa->spa_root_vdev;
988 vdev_t *tvd;
989
990 ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0);
991
992 do {
993 top = ztest_random(rvd->vdev_children);
994 tvd = rvd->vdev_child[top];
995 } while (tvd->vdev_ishole || (tvd->vdev_islog && !log_ok) ||
996 tvd->vdev_mg == NULL || tvd->vdev_mg->mg_class == NULL);
997
998 return (top);
999 }
1000
1001 static uint64_t
1002 ztest_random_dsl_prop(zfs_prop_t prop)
1003 {
1004 uint64_t value;
1005
1006 do {
1007 value = zfs_prop_random_value(prop, ztest_random(-1ULL));
1008 } while (prop == ZFS_PROP_CHECKSUM && value == ZIO_CHECKSUM_OFF);
1009
1010 return (value);
1011 }
1012
1013 static int
1014 ztest_dsl_prop_set_uint64(char *osname, zfs_prop_t prop, uint64_t value,
1015 boolean_t inherit)
1016 {
1017 const char *propname = zfs_prop_to_name(prop);
1018 const char *valname;
1019 char setpoint[MAXPATHLEN];
1020 uint64_t curval;
1021 int error;
1022
1023 error = dsl_prop_set_int(osname, propname,
1024 (inherit ? ZPROP_SRC_NONE : ZPROP_SRC_LOCAL), value);
1025
1026 if (error == ENOSPC) {
1027 ztest_record_enospc(FTAG);
1028 return (error);
1029 }
1030 ASSERT0(error);
1031
1032 VERIFY0(dsl_prop_get_integer(osname, propname, &curval, setpoint));
1033
1034 if (ztest_opts.zo_verbose >= 6) {
1035 VERIFY(zfs_prop_index_to_string(prop, curval, &valname) == 0);
1036 (void) printf("%s %s = %s at '%s'\n",
1037 osname, propname, valname, setpoint);
1038 }
1039
1040 return (error);
1041 }
1042
1043 static int
1044 ztest_spa_prop_set_uint64(zpool_prop_t prop, uint64_t value)
1045 {
1046 spa_t *spa = ztest_spa;
1047 nvlist_t *props = NULL;
1048 int error;
1049
1050 VERIFY(nvlist_alloc(&props, NV_UNIQUE_NAME, 0) == 0);
1051 VERIFY(nvlist_add_uint64(props, zpool_prop_to_name(prop), value) == 0);
1052
1053 error = spa_prop_set(spa, props);
1054
1055 nvlist_free(props);
1056
1057 if (error == ENOSPC) {
1058 ztest_record_enospc(FTAG);
1059 return (error);
1060 }
1061 ASSERT0(error);
1062
1063 return (error);
1064 }
1065
1066 static void
1067 ztest_rll_init(rll_t *rll)
1068 {
1069 rll->rll_writer = NULL;
1070 rll->rll_readers = 0;
1071 VERIFY(_mutex_init(&rll->rll_lock, USYNC_THREAD, NULL) == 0);
1072 VERIFY(cond_init(&rll->rll_cv, USYNC_THREAD, NULL) == 0);
1073 }
1074
1075 static void
1076 ztest_rll_destroy(rll_t *rll)
1077 {
1078 ASSERT(rll->rll_writer == NULL);
1079 ASSERT(rll->rll_readers == 0);
1080 VERIFY(_mutex_destroy(&rll->rll_lock) == 0);
1081 VERIFY(cond_destroy(&rll->rll_cv) == 0);
1082 }
1083
1084 static void
1085 ztest_rll_lock(rll_t *rll, rl_type_t type)
1086 {
1087 VERIFY(mutex_lock(&rll->rll_lock) == 0);
1088
1089 if (type == RL_READER) {
1090 while (rll->rll_writer != NULL)
1091 (void) cond_wait(&rll->rll_cv, &rll->rll_lock);
1092 rll->rll_readers++;
1093 } else {
1094 while (rll->rll_writer != NULL || rll->rll_readers)
1095 (void) cond_wait(&rll->rll_cv, &rll->rll_lock);
1096 rll->rll_writer = curthread;
1097 }
1098
1099 VERIFY(mutex_unlock(&rll->rll_lock) == 0);
1100 }
1101
1102 static void
1103 ztest_rll_unlock(rll_t *rll)
1104 {
1105 VERIFY(mutex_lock(&rll->rll_lock) == 0);
1106
1107 if (rll->rll_writer) {
1108 ASSERT(rll->rll_readers == 0);
1109 rll->rll_writer = NULL;
1110 } else {
1111 ASSERT(rll->rll_readers != 0);
1112 ASSERT(rll->rll_writer == NULL);
1113 rll->rll_readers--;
1114 }
1115
1116 if (rll->rll_writer == NULL && rll->rll_readers == 0)
1117 VERIFY(cond_broadcast(&rll->rll_cv) == 0);
1118
1119 VERIFY(mutex_unlock(&rll->rll_lock) == 0);
1120 }
1121
1122 static void
1123 ztest_object_lock(ztest_ds_t *zd, uint64_t object, rl_type_t type)
1124 {
1125 rll_t *rll = &zd->zd_object_lock[object & (ZTEST_OBJECT_LOCKS - 1)];
1126
1127 ztest_rll_lock(rll, type);
1128 }
1129
1130 static void
1131 ztest_object_unlock(ztest_ds_t *zd, uint64_t object)
1132 {
1133 rll_t *rll = &zd->zd_object_lock[object & (ZTEST_OBJECT_LOCKS - 1)];
1134
1135 ztest_rll_unlock(rll);
1136 }
1137
1138 static rl_t *
1139 ztest_range_lock(ztest_ds_t *zd, uint64_t object, uint64_t offset,
1140 uint64_t size, rl_type_t type)
1141 {
1142 uint64_t hash = object ^ (offset % (ZTEST_RANGE_LOCKS + 1));
1143 rll_t *rll = &zd->zd_range_lock[hash & (ZTEST_RANGE_LOCKS - 1)];
1144 rl_t *rl;
1145
1146 rl = umem_alloc(sizeof (*rl), UMEM_NOFAIL);
1147 rl->rl_object = object;
1148 rl->rl_offset = offset;
1149 rl->rl_size = size;
1150 rl->rl_lock = rll;
1151
1152 ztest_rll_lock(rll, type);
1153
1154 return (rl);
1155 }
1156
1157 static void
1158 ztest_range_unlock(rl_t *rl)
1159 {
1160 rll_t *rll = rl->rl_lock;
1161
1162 ztest_rll_unlock(rll);
1163
1164 umem_free(rl, sizeof (*rl));
1165 }
1166
1167 static void
1168 ztest_zd_init(ztest_ds_t *zd, ztest_shared_ds_t *szd, objset_t *os)
1169 {
1170 zd->zd_os = os;
1171 zd->zd_zilog = dmu_objset_zil(os);
1172 zd->zd_shared = szd;
1173 dmu_objset_name(os, zd->zd_name);
1174
1175 if (zd->zd_shared != NULL)
1176 zd->zd_shared->zd_seq = 0;
1177
1178 VERIFY(rwlock_init(&zd->zd_zilog_lock, USYNC_THREAD, NULL) == 0);
1179 VERIFY(_mutex_init(&zd->zd_dirobj_lock, USYNC_THREAD, NULL) == 0);
1180
1181 for (int l = 0; l < ZTEST_OBJECT_LOCKS; l++)
1182 ztest_rll_init(&zd->zd_object_lock[l]);
1183
1184 for (int l = 0; l < ZTEST_RANGE_LOCKS; l++)
1185 ztest_rll_init(&zd->zd_range_lock[l]);
1186 }
1187
1188 static void
1189 ztest_zd_fini(ztest_ds_t *zd)
1190 {
1191 VERIFY(_mutex_destroy(&zd->zd_dirobj_lock) == 0);
1192
1193 for (int l = 0; l < ZTEST_OBJECT_LOCKS; l++)
1194 ztest_rll_destroy(&zd->zd_object_lock[l]);
1195
1196 for (int l = 0; l < ZTEST_RANGE_LOCKS; l++)
1197 ztest_rll_destroy(&zd->zd_range_lock[l]);
1198 }
1199
1200 #define TXG_MIGHTWAIT (ztest_random(10) == 0 ? TXG_NOWAIT : TXG_WAIT)
1201
1202 static uint64_t
1203 ztest_tx_assign(dmu_tx_t *tx, uint64_t txg_how, const char *tag)
1204 {
1205 uint64_t txg;
1206 int error;
1207
1208 /*
1209 * Attempt to assign tx to some transaction group.
1210 */
1211 error = dmu_tx_assign(tx, txg_how);
1212 if (error) {
1213 if (error == ERESTART) {
1214 ASSERT(txg_how == TXG_NOWAIT);
1215 dmu_tx_wait(tx);
1216 } else {
1217 ASSERT3U(error, ==, ENOSPC);
1218 ztest_record_enospc(tag);
1219 }
1220 dmu_tx_abort(tx);
1221 return (0);
1222 }
1223 txg = dmu_tx_get_txg(tx);
1224 ASSERT(txg != 0);
1225 return (txg);
1226 }
1227
1228 static void
1229 ztest_pattern_set(void *buf, uint64_t size, uint64_t value)
1230 {
1231 uint64_t *ip = buf;
1232 uint64_t *ip_end = (uint64_t *)((uintptr_t)buf + (uintptr_t)size);
1233
1234 while (ip < ip_end)
1235 *ip++ = value;
1236 }
1237
1238 static boolean_t
1239 ztest_pattern_match(void *buf, uint64_t size, uint64_t value)
1240 {
1241 uint64_t *ip = buf;
1242 uint64_t *ip_end = (uint64_t *)((uintptr_t)buf + (uintptr_t)size);
1243 uint64_t diff = 0;
1244
1245 while (ip < ip_end)
1246 diff |= (value - *ip++);
1247
1248 return (diff == 0);
1249 }
1250
1251 static void
1252 ztest_bt_generate(ztest_block_tag_t *bt, objset_t *os, uint64_t object,
1253 uint64_t offset, uint64_t gen, uint64_t txg, uint64_t crtxg)
1254 {
1255 bt->bt_magic = BT_MAGIC;
1256 bt->bt_objset = dmu_objset_id(os);
1257 bt->bt_object = object;
1258 bt->bt_offset = offset;
1259 bt->bt_gen = gen;
1260 bt->bt_txg = txg;
1261 bt->bt_crtxg = crtxg;
1262 }
1263
1264 static void
1265 ztest_bt_verify(ztest_block_tag_t *bt, objset_t *os, uint64_t object,
1266 uint64_t offset, uint64_t gen, uint64_t txg, uint64_t crtxg)
1267 {
1268 ASSERT3U(bt->bt_magic, ==, BT_MAGIC);
1269 ASSERT3U(bt->bt_objset, ==, dmu_objset_id(os));
1270 ASSERT3U(bt->bt_object, ==, object);
1271 ASSERT3U(bt->bt_offset, ==, offset);
1272 ASSERT3U(bt->bt_gen, <=, gen);
1273 ASSERT3U(bt->bt_txg, <=, txg);
1274 ASSERT3U(bt->bt_crtxg, ==, crtxg);
1275 }
1276
1277 static ztest_block_tag_t *
1278 ztest_bt_bonus(dmu_buf_t *db)
1279 {
1280 dmu_object_info_t doi;
1281 ztest_block_tag_t *bt;
1282
1283 dmu_object_info_from_db(db, &doi);
1284 ASSERT3U(doi.doi_bonus_size, <=, db->db_size);
1285 ASSERT3U(doi.doi_bonus_size, >=, sizeof (*bt));
1286 bt = (void *)((char *)db->db_data + doi.doi_bonus_size - sizeof (*bt));
1287
1288 return (bt);
1289 }
1290
1291 /*
1292 * ZIL logging ops
1293 */
1294
1295 #define lrz_type lr_mode
1296 #define lrz_blocksize lr_uid
1297 #define lrz_ibshift lr_gid
1298 #define lrz_bonustype lr_rdev
1299 #define lrz_bonuslen lr_crtime[1]
1300
1301 static void
1302 ztest_log_create(ztest_ds_t *zd, dmu_tx_t *tx, lr_create_t *lr)
1303 {
1304 char *name = (void *)(lr + 1); /* name follows lr */
1305 size_t namesize = strlen(name) + 1;
1306 itx_t *itx;
1307
1308 if (zil_replaying(zd->zd_zilog, tx))
1309 return;
1310
1311 itx = zil_itx_create(TX_CREATE, sizeof (*lr) + namesize);
1312 bcopy(&lr->lr_common + 1, &itx->itx_lr + 1,
1313 sizeof (*lr) + namesize - sizeof (lr_t));
1314
1315 zil_itx_assign(zd->zd_zilog, itx, tx);
1316 }
1317
1318 static void
1319 ztest_log_remove(ztest_ds_t *zd, dmu_tx_t *tx, lr_remove_t *lr, uint64_t object)
1320 {
1321 char *name = (void *)(lr + 1); /* name follows lr */
1322 size_t namesize = strlen(name) + 1;
1323 itx_t *itx;
1324
1325 if (zil_replaying(zd->zd_zilog, tx))
1326 return;
1327
1328 itx = zil_itx_create(TX_REMOVE, sizeof (*lr) + namesize);
1329 bcopy(&lr->lr_common + 1, &itx->itx_lr + 1,
1330 sizeof (*lr) + namesize - sizeof (lr_t));
1331
1332 itx->itx_oid = object;
1333 zil_itx_assign(zd->zd_zilog, itx, tx);
1334 }
1335
1336 static void
1337 ztest_log_write(ztest_ds_t *zd, dmu_tx_t *tx, lr_write_t *lr)
1338 {
1339 itx_t *itx;
1340 itx_wr_state_t write_state = ztest_random(WR_NUM_STATES);
1341
1342 if (zil_replaying(zd->zd_zilog, tx))
1343 return;
1344
1345 if (lr->lr_length > ZIL_MAX_LOG_DATA)
1346 write_state = WR_INDIRECT;
1347
1348 itx = zil_itx_create(TX_WRITE,
1349 sizeof (*lr) + (write_state == WR_COPIED ? lr->lr_length : 0));
1350
1351 if (write_state == WR_COPIED &&
1352 dmu_read(zd->zd_os, lr->lr_foid, lr->lr_offset, lr->lr_length,
1353 ((lr_write_t *)&itx->itx_lr) + 1, DMU_READ_NO_PREFETCH) != 0) {
1354 zil_itx_destroy(itx);
1355 itx = zil_itx_create(TX_WRITE, sizeof (*lr));
1356 write_state = WR_NEED_COPY;
1357 }
1358 itx->itx_private = zd;
1359 itx->itx_wr_state = write_state;
1360 itx->itx_sync = (ztest_random(8) == 0);
1361 itx->itx_sod += (write_state == WR_NEED_COPY ? lr->lr_length : 0);
1362
1363 bcopy(&lr->lr_common + 1, &itx->itx_lr + 1,
1364 sizeof (*lr) - sizeof (lr_t));
1365
1366 zil_itx_assign(zd->zd_zilog, itx, tx);
1367 }
1368
1369 static void
1370 ztest_log_truncate(ztest_ds_t *zd, dmu_tx_t *tx, lr_truncate_t *lr)
1371 {
1372 itx_t *itx;
1373
1374 if (zil_replaying(zd->zd_zilog, tx))
1375 return;
1376
1377 itx = zil_itx_create(TX_TRUNCATE, sizeof (*lr));
1378 bcopy(&lr->lr_common + 1, &itx->itx_lr + 1,
1379 sizeof (*lr) - sizeof (lr_t));
1380
1381 itx->itx_sync = B_FALSE;
1382 zil_itx_assign(zd->zd_zilog, itx, tx);
1383 }
1384
1385 static void
1386 ztest_log_setattr(ztest_ds_t *zd, dmu_tx_t *tx, lr_setattr_t *lr)
1387 {
1388 itx_t *itx;
1389
1390 if (zil_replaying(zd->zd_zilog, tx))
1391 return;
1392
1393 itx = zil_itx_create(TX_SETATTR, sizeof (*lr));
1394 bcopy(&lr->lr_common + 1, &itx->itx_lr + 1,
1395 sizeof (*lr) - sizeof (lr_t));
1396
1397 itx->itx_sync = B_FALSE;
1398 zil_itx_assign(zd->zd_zilog, itx, tx);
1399 }
1400
1401 /*
1402 * ZIL replay ops
1403 */
1404 static int
1405 ztest_replay_create(ztest_ds_t *zd, lr_create_t *lr, boolean_t byteswap)
1406 {
1407 char *name = (void *)(lr + 1); /* name follows lr */
1408 objset_t *os = zd->zd_os;
1409 ztest_block_tag_t *bbt;
1410 dmu_buf_t *db;
1411 dmu_tx_t *tx;
1412 uint64_t txg;
1413 int error = 0;
1414
1415 if (byteswap)
1416 byteswap_uint64_array(lr, sizeof (*lr));
1417
1418 ASSERT(lr->lr_doid == ZTEST_DIROBJ);
1419 ASSERT(name[0] != '\0');
1420
1421 tx = dmu_tx_create(os);
1422
1423 dmu_tx_hold_zap(tx, lr->lr_doid, B_TRUE, name);
1424
1425 if (lr->lrz_type == DMU_OT_ZAP_OTHER) {
1426 dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, B_TRUE, NULL);
1427 } else {
1428 dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
1429 }
1430
1431 txg = ztest_tx_assign(tx, TXG_WAIT, FTAG);
1432 if (txg == 0)
1433 return (ENOSPC);
1434
1435 ASSERT(dmu_objset_zil(os)->zl_replay == !!lr->lr_foid);
1436
1437 if (lr->lrz_type == DMU_OT_ZAP_OTHER) {
1438 if (lr->lr_foid == 0) {
1439 lr->lr_foid = zap_create(os,
1440 lr->lrz_type, lr->lrz_bonustype,
1441 lr->lrz_bonuslen, tx);
1442 } else {
1443 error = zap_create_claim(os, lr->lr_foid,
1444 lr->lrz_type, lr->lrz_bonustype,
1445 lr->lrz_bonuslen, tx);
1446 }
1447 } else {
1448 if (lr->lr_foid == 0) {
1449 lr->lr_foid = dmu_object_alloc(os,
1450 lr->lrz_type, 0, lr->lrz_bonustype,
1451 lr->lrz_bonuslen, tx);
1452 } else {
1453 error = dmu_object_claim(os, lr->lr_foid,
1454 lr->lrz_type, 0, lr->lrz_bonustype,
1455 lr->lrz_bonuslen, tx);
1456 }
1457 }
1458
1459 if (error) {
1460 ASSERT3U(error, ==, EEXIST);
1461 ASSERT(zd->zd_zilog->zl_replay);
1462 dmu_tx_commit(tx);
1463 return (error);
1464 }
1465
1466 ASSERT(lr->lr_foid != 0);
1467
1468 if (lr->lrz_type != DMU_OT_ZAP_OTHER)
1469 VERIFY3U(0, ==, dmu_object_set_blocksize(os, lr->lr_foid,
1470 lr->lrz_blocksize, lr->lrz_ibshift, tx));
1471
1472 VERIFY3U(0, ==, dmu_bonus_hold(os, lr->lr_foid, FTAG, &db));
1473 bbt = ztest_bt_bonus(db);
1474 dmu_buf_will_dirty(db, tx);
1475 ztest_bt_generate(bbt, os, lr->lr_foid, -1ULL, lr->lr_gen, txg, txg);
1476 dmu_buf_rele(db, FTAG);
1477
1478 VERIFY3U(0, ==, zap_add(os, lr->lr_doid, name, sizeof (uint64_t), 1,
1479 &lr->lr_foid, tx));
1480
1481 (void) ztest_log_create(zd, tx, lr);
1482
1483 dmu_tx_commit(tx);
1484
1485 return (0);
1486 }
1487
1488 static int
1489 ztest_replay_remove(ztest_ds_t *zd, lr_remove_t *lr, boolean_t byteswap)
1490 {
1491 char *name = (void *)(lr + 1); /* name follows lr */
1492 objset_t *os = zd->zd_os;
1493 dmu_object_info_t doi;
1494 dmu_tx_t *tx;
1495 uint64_t object, txg;
1496
1497 if (byteswap)
1498 byteswap_uint64_array(lr, sizeof (*lr));
1499
1500 ASSERT(lr->lr_doid == ZTEST_DIROBJ);
1501 ASSERT(name[0] != '\0');
1502
1503 VERIFY3U(0, ==,
1504 zap_lookup(os, lr->lr_doid, name, sizeof (object), 1, &object));
1505 ASSERT(object != 0);
1506
1507 ztest_object_lock(zd, object, RL_WRITER);
1508
1509 VERIFY3U(0, ==, dmu_object_info(os, object, &doi));
1510
1511 tx = dmu_tx_create(os);
1512
1513 dmu_tx_hold_zap(tx, lr->lr_doid, B_FALSE, name);
1514 dmu_tx_hold_free(tx, object, 0, DMU_OBJECT_END);
1515
1516 txg = ztest_tx_assign(tx, TXG_WAIT, FTAG);
1517 if (txg == 0) {
1518 ztest_object_unlock(zd, object);
1519 return (ENOSPC);
1520 }
1521
1522 if (doi.doi_type == DMU_OT_ZAP_OTHER) {
1523 VERIFY3U(0, ==, zap_destroy(os, object, tx));
1524 } else {
1525 VERIFY3U(0, ==, dmu_object_free(os, object, tx));
1526 }
1527
1528 VERIFY3U(0, ==, zap_remove(os, lr->lr_doid, name, tx));
1529
1530 (void) ztest_log_remove(zd, tx, lr, object);
1531
1532 dmu_tx_commit(tx);
1533
1534 ztest_object_unlock(zd, object);
1535
1536 return (0);
1537 }
1538
1539 static int
1540 ztest_replay_write(ztest_ds_t *zd, lr_write_t *lr, boolean_t byteswap)
1541 {
1542 objset_t *os = zd->zd_os;
1543 void *data = lr + 1; /* data follows lr */
1544 uint64_t offset, length;
1545 ztest_block_tag_t *bt = data;
1546 ztest_block_tag_t *bbt;
1547 uint64_t gen, txg, lrtxg, crtxg;
1548 dmu_object_info_t doi;
1549 dmu_tx_t *tx;
1550 dmu_buf_t *db;
1551 arc_buf_t *abuf = NULL;
1552 rl_t *rl;
1553
1554 if (byteswap)
1555 byteswap_uint64_array(lr, sizeof (*lr));
1556
1557 offset = lr->lr_offset;
1558 length = lr->lr_length;
1559
1560 /* If it's a dmu_sync() block, write the whole block */
1561 if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) {
1562 uint64_t blocksize = BP_GET_LSIZE(&lr->lr_blkptr);
1563 if (length < blocksize) {
1564 offset -= offset % blocksize;
1565 length = blocksize;
1566 }
1567 }
1568
1569 if (bt->bt_magic == BSWAP_64(BT_MAGIC))
1570 byteswap_uint64_array(bt, sizeof (*bt));
1571
1572 if (bt->bt_magic != BT_MAGIC)
1573 bt = NULL;
1574
1575 ztest_object_lock(zd, lr->lr_foid, RL_READER);
1576 rl = ztest_range_lock(zd, lr->lr_foid, offset, length, RL_WRITER);
1577
1578 VERIFY3U(0, ==, dmu_bonus_hold(os, lr->lr_foid, FTAG, &db));
1579
1580 dmu_object_info_from_db(db, &doi);
1581
1582 bbt = ztest_bt_bonus(db);
1583 ASSERT3U(bbt->bt_magic, ==, BT_MAGIC);
1584 gen = bbt->bt_gen;
1585 crtxg = bbt->bt_crtxg;
1586 lrtxg = lr->lr_common.lrc_txg;
1587
1588 tx = dmu_tx_create(os);
1589
1590 dmu_tx_hold_write(tx, lr->lr_foid, offset, length);
1591
1592 if (ztest_random(8) == 0 && length == doi.doi_data_block_size &&
1593 P2PHASE(offset, length) == 0)
1594 abuf = dmu_request_arcbuf(db, length);
1595
1596 txg = ztest_tx_assign(tx, TXG_WAIT, FTAG);
1597 if (txg == 0) {
1598 if (abuf != NULL)
1599 dmu_return_arcbuf(abuf);
1600 dmu_buf_rele(db, FTAG);
1601 ztest_range_unlock(rl);
1602 ztest_object_unlock(zd, lr->lr_foid);
1603 return (ENOSPC);
1604 }
1605
1606 if (bt != NULL) {
1607 /*
1608 * Usually, verify the old data before writing new data --
1609 * but not always, because we also want to verify correct
1610 * behavior when the data was not recently read into cache.
1611 */
1612 ASSERT(offset % doi.doi_data_block_size == 0);
1613 if (ztest_random(4) != 0) {
1614 int prefetch = ztest_random(2) ?
1615 DMU_READ_PREFETCH : DMU_READ_NO_PREFETCH;
1616 ztest_block_tag_t rbt;
1617
1618 VERIFY(dmu_read(os, lr->lr_foid, offset,
1619 sizeof (rbt), &rbt, prefetch) == 0);
1620 if (rbt.bt_magic == BT_MAGIC) {
1621 ztest_bt_verify(&rbt, os, lr->lr_foid,
1622 offset, gen, txg, crtxg);
1623 }
1624 }
1625
1626 /*
1627 * Writes can appear to be newer than the bonus buffer because
1628 * the ztest_get_data() callback does a dmu_read() of the
1629 * open-context data, which may be different than the data
1630 * as it was when the write was generated.
1631 */
1632 if (zd->zd_zilog->zl_replay) {
1633 ztest_bt_verify(bt, os, lr->lr_foid, offset,
1634 MAX(gen, bt->bt_gen), MAX(txg, lrtxg),
1635 bt->bt_crtxg);
1636 }
1637
1638 /*
1639 * Set the bt's gen/txg to the bonus buffer's gen/txg
1640 * so that all of the usual ASSERTs will work.
1641 */
1642 ztest_bt_generate(bt, os, lr->lr_foid, offset, gen, txg, crtxg);
1643 }
1644
1645 if (abuf == NULL) {
1646 dmu_write(os, lr->lr_foid, offset, length, data, tx);
1647 } else {
1648 bcopy(data, abuf->b_data, length);
1649 dmu_assign_arcbuf(db, offset, abuf, tx);
1650 }
1651
1652 (void) ztest_log_write(zd, tx, lr);
1653
1654 dmu_buf_rele(db, FTAG);
1655
1656 dmu_tx_commit(tx);
1657
1658 ztest_range_unlock(rl);
1659 ztest_object_unlock(zd, lr->lr_foid);
1660
1661 return (0);
1662 }
1663
1664 static int
1665 ztest_replay_truncate(ztest_ds_t *zd, lr_truncate_t *lr, boolean_t byteswap)
1666 {
1667 objset_t *os = zd->zd_os;
1668 dmu_tx_t *tx;
1669 uint64_t txg;
1670 rl_t *rl;
1671
1672 if (byteswap)
1673 byteswap_uint64_array(lr, sizeof (*lr));
1674
1675 ztest_object_lock(zd, lr->lr_foid, RL_READER);
1676 rl = ztest_range_lock(zd, lr->lr_foid, lr->lr_offset, lr->lr_length,
1677 RL_WRITER);
1678
1679 tx = dmu_tx_create(os);
1680
1681 dmu_tx_hold_free(tx, lr->lr_foid, lr->lr_offset, lr->lr_length);
1682
1683 txg = ztest_tx_assign(tx, TXG_WAIT, FTAG);
1684 if (txg == 0) {
1685 ztest_range_unlock(rl);
1686 ztest_object_unlock(zd, lr->lr_foid);
1687 return (ENOSPC);
1688 }
1689
1690 VERIFY(dmu_free_range(os, lr->lr_foid, lr->lr_offset,
1691 lr->lr_length, tx) == 0);
1692
1693 (void) ztest_log_truncate(zd, tx, lr);
1694
1695 dmu_tx_commit(tx);
1696
1697 ztest_range_unlock(rl);
1698 ztest_object_unlock(zd, lr->lr_foid);
1699
1700 return (0);
1701 }
1702
1703 static int
1704 ztest_replay_setattr(ztest_ds_t *zd, lr_setattr_t *lr, boolean_t byteswap)
1705 {
1706 objset_t *os = zd->zd_os;
1707 dmu_tx_t *tx;
1708 dmu_buf_t *db;
1709 ztest_block_tag_t *bbt;
1710 uint64_t txg, lrtxg, crtxg;
1711
1712 if (byteswap)
1713 byteswap_uint64_array(lr, sizeof (*lr));
1714
1715 ztest_object_lock(zd, lr->lr_foid, RL_WRITER);
1716
1717 VERIFY3U(0, ==, dmu_bonus_hold(os, lr->lr_foid, FTAG, &db));
1718
1719 tx = dmu_tx_create(os);
1720 dmu_tx_hold_bonus(tx, lr->lr_foid);
1721
1722 txg = ztest_tx_assign(tx, TXG_WAIT, FTAG);
1723 if (txg == 0) {
1724 dmu_buf_rele(db, FTAG);
1725 ztest_object_unlock(zd, lr->lr_foid);
1726 return (ENOSPC);
1727 }
1728
1729 bbt = ztest_bt_bonus(db);
1730 ASSERT3U(bbt->bt_magic, ==, BT_MAGIC);
1731 crtxg = bbt->bt_crtxg;
1732 lrtxg = lr->lr_common.lrc_txg;
1733
1734 if (zd->zd_zilog->zl_replay) {
1735 ASSERT(lr->lr_size != 0);
1736 ASSERT(lr->lr_mode != 0);
1737 ASSERT(lrtxg != 0);
1738 } else {
1739 /*
1740 * Randomly change the size and increment the generation.
1741 */
1742 lr->lr_size = (ztest_random(db->db_size / sizeof (*bbt)) + 1) *
1743 sizeof (*bbt);
1744 lr->lr_mode = bbt->bt_gen + 1;
1745 ASSERT(lrtxg == 0);
1746 }
1747
1748 /*
1749 * Verify that the current bonus buffer is not newer than our txg.
1750 */
1751 ztest_bt_verify(bbt, os, lr->lr_foid, -1ULL, lr->lr_mode,
1752 MAX(txg, lrtxg), crtxg);
1753
1754 dmu_buf_will_dirty(db, tx);
1755
1756 ASSERT3U(lr->lr_size, >=, sizeof (*bbt));
1757 ASSERT3U(lr->lr_size, <=, db->db_size);
1758 VERIFY0(dmu_set_bonus(db, lr->lr_size, tx));
1759 bbt = ztest_bt_bonus(db);
1760
1761 ztest_bt_generate(bbt, os, lr->lr_foid, -1ULL, lr->lr_mode, txg, crtxg);
1762
1763 dmu_buf_rele(db, FTAG);
1764
1765 (void) ztest_log_setattr(zd, tx, lr);
1766
1767 dmu_tx_commit(tx);
1768
1769 ztest_object_unlock(zd, lr->lr_foid);
1770
1771 return (0);
1772 }
1773
1774 zil_replay_func_t *ztest_replay_vector[TX_MAX_TYPE] = {
1775 NULL, /* 0 no such transaction type */
1776 ztest_replay_create, /* TX_CREATE */
1777 NULL, /* TX_MKDIR */
1778 NULL, /* TX_MKXATTR */
1779 NULL, /* TX_SYMLINK */
1780 ztest_replay_remove, /* TX_REMOVE */
1781 NULL, /* TX_RMDIR */
1782 NULL, /* TX_LINK */
1783 NULL, /* TX_RENAME */
1784 ztest_replay_write, /* TX_WRITE */
1785 ztest_replay_truncate, /* TX_TRUNCATE */
1786 ztest_replay_setattr, /* TX_SETATTR */
1787 NULL, /* TX_ACL */
1788 NULL, /* TX_CREATE_ACL */
1789 NULL, /* TX_CREATE_ATTR */
1790 NULL, /* TX_CREATE_ACL_ATTR */
1791 NULL, /* TX_MKDIR_ACL */
1792 NULL, /* TX_MKDIR_ATTR */
1793 NULL, /* TX_MKDIR_ACL_ATTR */
1794 NULL, /* TX_WRITE2 */
1795 };
1796
1797 /*
1798 * ZIL get_data callbacks
1799 */
1800
1801 static void
1802 ztest_get_done(zgd_t *zgd, int error)
1803 {
1804 ztest_ds_t *zd = zgd->zgd_private;
1805 uint64_t object = zgd->zgd_rl->rl_object;
1806
1807 if (zgd->zgd_db)
1808 dmu_buf_rele(zgd->zgd_db, zgd);
1809
1810 ztest_range_unlock(zgd->zgd_rl);
1811 ztest_object_unlock(zd, object);
1812
1813 if (error == 0 && zgd->zgd_bp)
1814 zil_add_block(zgd->zgd_zilog, zgd->zgd_bp);
1815
1816 umem_free(zgd, sizeof (*zgd));
1817 }
1818
1819 static int
1820 ztest_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio)
1821 {
1822 ztest_ds_t *zd = arg;
1823 objset_t *os = zd->zd_os;
1824 uint64_t object = lr->lr_foid;
1825 uint64_t offset = lr->lr_offset;
1826 uint64_t size = lr->lr_length;
1827 blkptr_t *bp = &lr->lr_blkptr;
1828 uint64_t txg = lr->lr_common.lrc_txg;
1829 uint64_t crtxg;
1830 dmu_object_info_t doi;
1831 dmu_buf_t *db;
1832 zgd_t *zgd;
1833 int error;
1834
1835 ztest_object_lock(zd, object, RL_READER);
1836 error = dmu_bonus_hold(os, object, FTAG, &db);
1837 if (error) {
1838 ztest_object_unlock(zd, object);
1839 return (error);
1840 }
1841
1842 crtxg = ztest_bt_bonus(db)->bt_crtxg;
1843
1844 if (crtxg == 0 || crtxg > txg) {
1845 dmu_buf_rele(db, FTAG);
1846 ztest_object_unlock(zd, object);
1847 return (ENOENT);
1848 }
1849
1850 dmu_object_info_from_db(db, &doi);
1851 dmu_buf_rele(db, FTAG);
1852 db = NULL;
1853
1854 zgd = umem_zalloc(sizeof (*zgd), UMEM_NOFAIL);
1855 zgd->zgd_zilog = zd->zd_zilog;
1856 zgd->zgd_private = zd;
1857
1858 if (buf != NULL) { /* immediate write */
1859 zgd->zgd_rl = ztest_range_lock(zd, object, offset, size,
1860 RL_READER);
1861
1862 error = dmu_read(os, object, offset, size, buf,
1863 DMU_READ_NO_PREFETCH);
1864 ASSERT(error == 0);
1865 } else {
1866 size = doi.doi_data_block_size;
1867 if (ISP2(size)) {
1868 offset = P2ALIGN(offset, size);
1869 } else {
1870 ASSERT(offset < size);
1871 offset = 0;
1872 }
1873
1874 zgd->zgd_rl = ztest_range_lock(zd, object, offset, size,
1875 RL_READER);
1876
1877 error = dmu_buf_hold(os, object, offset, zgd, &db,
1878 DMU_READ_NO_PREFETCH);
1879
1880 if (error == 0) {
1881 blkptr_t *obp = dmu_buf_get_blkptr(db);
1882 if (obp) {
1883 ASSERT(BP_IS_HOLE(bp));
1884 *bp = *obp;
1885 }
1886
1887 zgd->zgd_db = db;
1888 zgd->zgd_bp = bp;
1889
1890 ASSERT(db->db_offset == offset);
1891 ASSERT(db->db_size == size);
1892
1893 error = dmu_sync(zio, lr->lr_common.lrc_txg,
1894 ztest_get_done, zgd);
1895
1896 if (error == 0)
1897 return (0);
1898 }
1899 }
1900
1901 ztest_get_done(zgd, error);
1902
1903 return (error);
1904 }
1905
1906 static void *
1907 ztest_lr_alloc(size_t lrsize, char *name)
1908 {
1909 char *lr;
1910 size_t namesize = name ? strlen(name) + 1 : 0;
1911
1912 lr = umem_zalloc(lrsize + namesize, UMEM_NOFAIL);
1913
1914 if (name)
1915 bcopy(name, lr + lrsize, namesize);
1916
1917 return (lr);
1918 }
1919
1920 void
1921 ztest_lr_free(void *lr, size_t lrsize, char *name)
1922 {
1923 size_t namesize = name ? strlen(name) + 1 : 0;
1924
1925 umem_free(lr, lrsize + namesize);
1926 }
1927
1928 /*
1929 * Lookup a bunch of objects. Returns the number of objects not found.
1930 */
1931 static int
1932 ztest_lookup(ztest_ds_t *zd, ztest_od_t *od, int count)
1933 {
1934 int missing = 0;
1935 int error;
1936
1937 ASSERT(_mutex_held(&zd->zd_dirobj_lock));
1938
1939 for (int i = 0; i < count; i++, od++) {
1940 od->od_object = 0;
1941 error = zap_lookup(zd->zd_os, od->od_dir, od->od_name,
1942 sizeof (uint64_t), 1, &od->od_object);
1943 if (error) {
1944 ASSERT(error == ENOENT);
1945 ASSERT(od->od_object == 0);
1946 missing++;
1947 } else {
1948 dmu_buf_t *db;
1949 ztest_block_tag_t *bbt;
1950 dmu_object_info_t doi;
1951
1952 ASSERT(od->od_object != 0);
1953 ASSERT(missing == 0); /* there should be no gaps */
1954
1955 ztest_object_lock(zd, od->od_object, RL_READER);
1956 VERIFY3U(0, ==, dmu_bonus_hold(zd->zd_os,
1957 od->od_object, FTAG, &db));
1958 dmu_object_info_from_db(db, &doi);
1959 bbt = ztest_bt_bonus(db);
1960 ASSERT3U(bbt->bt_magic, ==, BT_MAGIC);
1961 od->od_type = doi.doi_type;
1962 od->od_blocksize = doi.doi_data_block_size;
1963 od->od_gen = bbt->bt_gen;
1964 dmu_buf_rele(db, FTAG);
1965 ztest_object_unlock(zd, od->od_object);
1966 }
1967 }
1968
1969 return (missing);
1970 }
1971
1972 static int
1973 ztest_create(ztest_ds_t *zd, ztest_od_t *od, int count)
1974 {
1975 int missing = 0;
1976
1977 ASSERT(_mutex_held(&zd->zd_dirobj_lock));
1978
1979 for (int i = 0; i < count; i++, od++) {
1980 if (missing) {
1981 od->od_object = 0;
1982 missing++;
1983 continue;
1984 }
1985
1986 lr_create_t *lr = ztest_lr_alloc(sizeof (*lr), od->od_name);
1987
1988 lr->lr_doid = od->od_dir;
1989 lr->lr_foid = 0; /* 0 to allocate, > 0 to claim */
1990 lr->lrz_type = od->od_crtype;
1991 lr->lrz_blocksize = od->od_crblocksize;
1992 lr->lrz_ibshift = ztest_random_ibshift();
1993 lr->lrz_bonustype = DMU_OT_UINT64_OTHER;
1994 lr->lrz_bonuslen = dmu_bonus_max();
1995 lr->lr_gen = od->od_crgen;
1996 lr->lr_crtime[0] = time(NULL);
1997
1998 if (ztest_replay_create(zd, lr, B_FALSE) != 0) {
1999 ASSERT(missing == 0);
2000 od->od_object = 0;
2001 missing++;
2002 } else {
2003 od->od_object = lr->lr_foid;
2004 od->od_type = od->od_crtype;
2005 od->od_blocksize = od->od_crblocksize;
2006 od->od_gen = od->od_crgen;
2007 ASSERT(od->od_object != 0);
2008 }
2009
2010 ztest_lr_free(lr, sizeof (*lr), od->od_name);
2011 }
2012
2013 return (missing);
2014 }
2015
2016 static int
2017 ztest_remove(ztest_ds_t *zd, ztest_od_t *od, int count)
2018 {
2019 int missing = 0;
2020 int error;
2021
2022 ASSERT(_mutex_held(&zd->zd_dirobj_lock));
2023
2024 od += count - 1;
2025
2026 for (int i = count - 1; i >= 0; i--, od--) {
2027 if (missing) {
2028 missing++;
2029 continue;
2030 }
2031
2032 /*
2033 * No object was found.
2034 */
2035 if (od->od_object == 0)
2036 continue;
2037
2038 lr_remove_t *lr = ztest_lr_alloc(sizeof (*lr), od->od_name);
2039
2040 lr->lr_doid = od->od_dir;
2041
2042 if ((error = ztest_replay_remove(zd, lr, B_FALSE)) != 0) {
2043 ASSERT3U(error, ==, ENOSPC);
2044 missing++;
2045 } else {
2046 od->od_object = 0;
2047 }
2048 ztest_lr_free(lr, sizeof (*lr), od->od_name);
2049 }
2050
2051 return (missing);
2052 }
2053
2054 static int
2055 ztest_write(ztest_ds_t *zd, uint64_t object, uint64_t offset, uint64_t size,
2056 void *data)
2057 {
2058 lr_write_t *lr;
2059 int error;
2060
2061 lr = ztest_lr_alloc(sizeof (*lr) + size, NULL);
2062
2063 lr->lr_foid = object;
2064 lr->lr_offset = offset;
2065 lr->lr_length = size;
2066 lr->lr_blkoff = 0;
2067 BP_ZERO(&lr->lr_blkptr);
2068
2069 bcopy(data, lr + 1, size);
2070
2071 error = ztest_replay_write(zd, lr, B_FALSE);
2072
2073 ztest_lr_free(lr, sizeof (*lr) + size, NULL);
2074
2075 return (error);
2076 }
2077
2078 static int
2079 ztest_truncate(ztest_ds_t *zd, uint64_t object, uint64_t offset, uint64_t size)
2080 {
2081 lr_truncate_t *lr;
2082 int error;
2083
2084 lr = ztest_lr_alloc(sizeof (*lr), NULL);
2085
2086 lr->lr_foid = object;
2087 lr->lr_offset = offset;
2088 lr->lr_length = size;
2089
2090 error = ztest_replay_truncate(zd, lr, B_FALSE);
2091
2092 ztest_lr_free(lr, sizeof (*lr), NULL);
2093
2094 return (error);
2095 }
2096
2097 static int
2098 ztest_setattr(ztest_ds_t *zd, uint64_t object)
2099 {
2100 lr_setattr_t *lr;
2101 int error;
2102
2103 lr = ztest_lr_alloc(sizeof (*lr), NULL);
2104
2105 lr->lr_foid = object;
2106 lr->lr_size = 0;
2107 lr->lr_mode = 0;
2108
2109 error = ztest_replay_setattr(zd, lr, B_FALSE);
2110
2111 ztest_lr_free(lr, sizeof (*lr), NULL);
2112
2113 return (error);
2114 }
2115
2116 static void
2117 ztest_prealloc(ztest_ds_t *zd, uint64_t object, uint64_t offset, uint64_t size)
2118 {
2119 objset_t *os = zd->zd_os;
2120 dmu_tx_t *tx;
2121 uint64_t txg;
2122 rl_t *rl;
2123
2124 txg_wait_synced(dmu_objset_pool(os), 0);
2125
2126 ztest_object_lock(zd, object, RL_READER);
2127 rl = ztest_range_lock(zd, object, offset, size, RL_WRITER);
2128
2129 tx = dmu_tx_create(os);
2130
2131 dmu_tx_hold_write(tx, object, offset, size);
2132
2133 txg = ztest_tx_assign(tx, TXG_WAIT, FTAG);
2134
2135 if (txg != 0) {
2136 dmu_prealloc(os, object, offset, size, tx);
2137 dmu_tx_commit(tx);
2138 txg_wait_synced(dmu_objset_pool(os), txg);
2139 } else {
2140 (void) dmu_free_long_range(os, object, offset, size);
2141 }
2142
2143 ztest_range_unlock(rl);
2144 ztest_object_unlock(zd, object);
2145 }
2146
2147 static void
2148 ztest_io(ztest_ds_t *zd, uint64_t object, uint64_t offset)
2149 {
2150 int err;
2151 ztest_block_tag_t wbt;
2152 dmu_object_info_t doi;
2153 enum ztest_io_type io_type;
2154 uint64_t blocksize;
2155 void *data;
2156
2157 VERIFY(dmu_object_info(zd->zd_os, object, &doi) == 0);
2158 blocksize = doi.doi_data_block_size;
2159 data = umem_alloc(blocksize, UMEM_NOFAIL);
2160
2161 /*
2162 * Pick an i/o type at random, biased toward writing block tags.
2163 */
2164 io_type = ztest_random(ZTEST_IO_TYPES);
2165 if (ztest_random(2) == 0)
2166 io_type = ZTEST_IO_WRITE_TAG;
2167
2168 (void) rw_rdlock(&zd->zd_zilog_lock);
2169
2170 switch (io_type) {
2171
2172 case ZTEST_IO_WRITE_TAG:
2173 ztest_bt_generate(&wbt, zd->zd_os, object, offset, 0, 0, 0);
2174 (void) ztest_write(zd, object, offset, sizeof (wbt), &wbt);
2175 break;
2176
2177 case ZTEST_IO_WRITE_PATTERN:
2178 (void) memset(data, 'a' + (object + offset) % 5, blocksize);
2179 if (ztest_random(2) == 0) {
2180 /*
2181 * Induce fletcher2 collisions to ensure that
2182 * zio_ddt_collision() detects and resolves them
2183 * when using fletcher2-verify for deduplication.
2184 */
2185 ((uint64_t *)data)[0] ^= 1ULL << 63;
2186 ((uint64_t *)data)[4] ^= 1ULL << 63;
2187 }
2188 (void) ztest_write(zd, object, offset, blocksize, data);
2189 break;
2190
2191 case ZTEST_IO_WRITE_ZEROES:
2192 bzero(data, blocksize);
2193 (void) ztest_write(zd, object, offset, blocksize, data);
2194 break;
2195
2196 case ZTEST_IO_TRUNCATE:
2197 (void) ztest_truncate(zd, object, offset, blocksize);
2198 break;
2199
2200 case ZTEST_IO_SETATTR:
2201 (void) ztest_setattr(zd, object);
2202 break;
2203
2204 case ZTEST_IO_REWRITE:
2205 (void) rw_rdlock(&ztest_name_lock);
2206 err = ztest_dsl_prop_set_uint64(zd->zd_name,
2207 ZFS_PROP_CHECKSUM, spa_dedup_checksum(ztest_spa),
2208 B_FALSE);
2209 VERIFY(err == 0 || err == ENOSPC);
2210 err = ztest_dsl_prop_set_uint64(zd->zd_name,
2211 ZFS_PROP_COMPRESSION,
2212 ztest_random_dsl_prop(ZFS_PROP_COMPRESSION),
2213 B_FALSE);
2214 VERIFY(err == 0 || err == ENOSPC);
2215 (void) rw_unlock(&ztest_name_lock);
2216
2217 VERIFY0(dmu_read(zd->zd_os, object, offset, blocksize, data,
2218 DMU_READ_NO_PREFETCH));
2219
2220 (void) ztest_write(zd, object, offset, blocksize, data);
2221 break;
2222 }
2223
2224 (void) rw_unlock(&zd->zd_zilog_lock);
2225
2226 umem_free(data, blocksize);
2227 }
2228
2229 /*
2230 * Initialize an object description template.
2231 */
2232 static void
2233 ztest_od_init(ztest_od_t *od, uint64_t id, char *tag, uint64_t index,
2234 dmu_object_type_t type, uint64_t blocksize, uint64_t gen)
2235 {
2236 od->od_dir = ZTEST_DIROBJ;
2237 od->od_object = 0;
2238
2239 od->od_crtype = type;
2240 od->od_crblocksize = blocksize ? blocksize : ztest_random_blocksize();
2241 od->od_crgen = gen;
2242
2243 od->od_type = DMU_OT_NONE;
2244 od->od_blocksize = 0;
2245 od->od_gen = 0;
2246
2247 (void) snprintf(od->od_name, sizeof (od->od_name), "%s(%lld)[%llu]",
2248 tag, (int64_t)id, index);
2249 }
2250
2251 /*
2252 * Lookup or create the objects for a test using the od template.
2253 * If the objects do not all exist, or if 'remove' is specified,
2254 * remove any existing objects and create new ones. Otherwise,
2255 * use the existing objects.
2256 */
2257 static int
2258 ztest_object_init(ztest_ds_t *zd, ztest_od_t *od, size_t size, boolean_t remove)
2259 {
2260 int count = size / sizeof (*od);
2261 int rv = 0;
2262
2263 VERIFY(mutex_lock(&zd->zd_dirobj_lock) == 0);
2264 if ((ztest_lookup(zd, od, count) != 0 || remove) &&
2265 (ztest_remove(zd, od, count) != 0 ||
2266 ztest_create(zd, od, count) != 0))
2267 rv = -1;
2268 zd->zd_od = od;
2269 VERIFY(mutex_unlock(&zd->zd_dirobj_lock) == 0);
2270
2271 return (rv);
2272 }
2273
2274 /* ARGSUSED */
2275 void
2276 ztest_zil_commit(ztest_ds_t *zd, uint64_t id)
2277 {
2278 zilog_t *zilog = zd->zd_zilog;
2279
2280 (void) rw_rdlock(&zd->zd_zilog_lock);
2281
2282 zil_commit(zilog, ztest_random(ZTEST_OBJECTS));
2283
2284 /*
2285 * Remember the committed values in zd, which is in parent/child
2286 * shared memory. If we die, the next iteration of ztest_run()
2287 * will verify that the log really does contain this record.
2288 */
2289 mutex_enter(&zilog->zl_lock);
2290 ASSERT(zd->zd_shared != NULL);
2291 ASSERT3U(zd->zd_shared->zd_seq, <=, zilog->zl_commit_lr_seq);
2292 zd->zd_shared->zd_seq = zilog->zl_commit_lr_seq;
2293 mutex_exit(&zilog->zl_lock);
2294
2295 (void) rw_unlock(&zd->zd_zilog_lock);
2296 }
2297
2298 /*
2299 * This function is designed to simulate the operations that occur during a
2300 * mount/unmount operation. We hold the dataset across these operations in an
2301 * attempt to expose any implicit assumptions about ZIL management.
2302 */
2303 /* ARGSUSED */
2304 void
2305 ztest_zil_remount(ztest_ds_t *zd, uint64_t id)
2306 {
2307 objset_t *os = zd->zd_os;
2308
2309 /*
2310 * We grab the zd_dirobj_lock to ensure that no other thread is
2311 * updating the zil (i.e. adding in-memory log records) and the
2312 * zd_zilog_lock to block any I/O.
2313 */
2314 VERIFY0(mutex_lock(&zd->zd_dirobj_lock));
2315 (void) rw_wrlock(&zd->zd_zilog_lock);
2316
2317 /* zfsvfs_teardown() */
2318 zil_close(zd->zd_zilog);
2319
2320 /* zfsvfs_setup() */
2321 VERIFY(zil_open(os, ztest_get_data) == zd->zd_zilog);
2322 zil_replay(os, zd, ztest_replay_vector);
2323
2324 (void) rw_unlock(&zd->zd_zilog_lock);
2325 VERIFY(mutex_unlock(&zd->zd_dirobj_lock) == 0);
2326 }
2327
2328 /*
2329 * Verify that we can't destroy an active pool, create an existing pool,
2330 * or create a pool with a bad vdev spec.
2331 */
2332 /* ARGSUSED */
2333 void
2334 ztest_spa_create_destroy(ztest_ds_t *zd, uint64_t id)
2335 {
2336 ztest_shared_opts_t *zo = &ztest_opts;
2337 spa_t *spa;
2338 nvlist_t *nvroot;
2339
2340 /*
2341 * Attempt to create using a bad file.
2342 */
2343 nvroot = make_vdev_root("/dev/bogus", NULL, NULL, 0, 0, 0, 0, 0, 1);
2344 VERIFY3U(ENOENT, ==,
2345 spa_create("ztest_bad_file", nvroot, NULL, NULL));
2346 nvlist_free(nvroot);
2347
2348 /*
2349 * Attempt to create using a bad mirror.
2350 */
2351 nvroot = make_vdev_root("/dev/bogus", NULL, NULL, 0, 0, 0, 0, 2, 1);
2352 VERIFY3U(ENOENT, ==,
2353 spa_create("ztest_bad_mirror", nvroot, NULL, NULL));
2354 nvlist_free(nvroot);
2355
2356 /*
2357 * Attempt to create an existing pool. It shouldn't matter
2358 * what's in the nvroot; we should fail with EEXIST.
2359 */
2360 (void) rw_rdlock(&ztest_name_lock);
2361 nvroot = make_vdev_root("/dev/bogus", NULL, NULL, 0, 0, 0, 0, 0, 1);
2362 VERIFY3U(EEXIST, ==, spa_create(zo->zo_pool, nvroot, NULL, NULL));
2363 nvlist_free(nvroot);
2364 VERIFY3U(0, ==, spa_open(zo->zo_pool, &spa, FTAG));
2365 VERIFY3U(EBUSY, ==, spa_destroy(zo->zo_pool));
2366 spa_close(spa, FTAG);
2367
2368 (void) rw_unlock(&ztest_name_lock);
2369 }
2370
2371 /* ARGSUSED */
2372 void
2373 ztest_spa_upgrade(ztest_ds_t *zd, uint64_t id)
2374 {
2375 spa_t *spa;
2376 uint64_t initial_version = SPA_VERSION_INITIAL;
2377 uint64_t version, newversion;
2378 nvlist_t *nvroot, *props;
2379 char *name;
2380
2381 VERIFY0(mutex_lock(&ztest_vdev_lock));
2382 name = kmem_asprintf("%s_upgrade", ztest_opts.zo_pool);
2383
2384 /*
2385 * Clean up from previous runs.
2386 */
2387 (void) spa_destroy(name);
2388
2389 nvroot = make_vdev_root(NULL, NULL, name, ztest_opts.zo_vdev_size, 0,
2390 0, ztest_opts.zo_raidz, ztest_opts.zo_mirrors, 1);
2391
2392 /*
2393 * If we're configuring a RAIDZ device then make sure that the
2394 * the initial version is capable of supporting that feature.
2395 */
2396 switch (ztest_opts.zo_raidz_parity) {
2397 case 0:
2398 case 1:
2399 initial_version = SPA_VERSION_INITIAL;
2400 break;
2401 case 2:
2402 initial_version = SPA_VERSION_RAIDZ2;
2403 break;
2404 case 3:
2405 initial_version = SPA_VERSION_RAIDZ3;
2406 break;
2407 }
2408
2409 /*
2410 * Create a pool with a spa version that can be upgraded. Pick
2411 * a value between initial_version and SPA_VERSION_BEFORE_FEATURES.
2412 */
2413 do {
2414 version = ztest_random_spa_version(initial_version);
2415 } while (version > SPA_VERSION_BEFORE_FEATURES);
2416
2417 props = fnvlist_alloc();
2418 fnvlist_add_uint64(props,
2419 zpool_prop_to_name(ZPOOL_PROP_VERSION), version);
2420 VERIFY0(spa_create(name, nvroot, props, NULL));
2421 fnvlist_free(nvroot);
2422 fnvlist_free(props);
2423
2424 VERIFY0(spa_open(name, &spa, FTAG));
2425 VERIFY3U(spa_version(spa), ==, version);
2426 newversion = ztest_random_spa_version(version + 1);
2427
2428 if (ztest_opts.zo_verbose >= 4) {
2429 (void) printf("upgrading spa version from %llu to %llu\n",
2430 (u_longlong_t)version, (u_longlong_t)newversion);
2431 }
2432
2433 spa_upgrade(spa, newversion);
2434 VERIFY3U(spa_version(spa), >, version);
2435 VERIFY3U(spa_version(spa), ==, fnvlist_lookup_uint64(spa->spa_config,
2436 zpool_prop_to_name(ZPOOL_PROP_VERSION)));
2437 spa_close(spa, FTAG);
2438
2439 strfree(name);
2440 VERIFY0(mutex_unlock(&ztest_vdev_lock));
2441 }
2442
2443 static vdev_t *
2444 vdev_lookup_by_path(vdev_t *vd, const char *path)
2445 {
2446 vdev_t *mvd;
2447
2448 if (vd->vdev_path != NULL && strcmp(path, vd->vdev_path) == 0)
2449 return (vd);
2450
2451 for (int c = 0; c < vd->vdev_children; c++)
2452 if ((mvd = vdev_lookup_by_path(vd->vdev_child[c], path)) !=
2453 NULL)
2454 return (mvd);
2455
2456 return (NULL);
2457 }
2458
2459 /*
2460 * Find the first available hole which can be used as a top-level.
2461 */
2462 int
2463 find_vdev_hole(spa_t *spa)
2464 {
2465 vdev_t *rvd = spa->spa_root_vdev;
2466 int c;
2467
2468 ASSERT(spa_config_held(spa, SCL_VDEV, RW_READER) == SCL_VDEV);
2469
2470 for (c = 0; c < rvd->vdev_children; c++) {
2471 vdev_t *cvd = rvd->vdev_child[c];
2472
2473 if (cvd->vdev_ishole)
2474 break;
2475 }
2476 return (c);
2477 }
2478
2479 /*
2480 * Verify that vdev_add() works as expected.
2481 */
2482 /* ARGSUSED */
2483 void
2484 ztest_vdev_add_remove(ztest_ds_t *zd, uint64_t id)
2485 {
2486 ztest_shared_t *zs = ztest_shared;
2487 spa_t *spa = ztest_spa;
2488 uint64_t leaves;
2489 uint64_t guid;
2490 nvlist_t *nvroot;
2491 int error;
2492
2493 VERIFY(mutex_lock(&ztest_vdev_lock) == 0);
2494 leaves = MAX(zs->zs_mirrors + zs->zs_splits, 1) * ztest_opts.zo_raidz;
2495
2496 spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
2497
2498 ztest_shared->zs_vdev_next_leaf = find_vdev_hole(spa) * leaves;
2499
2500 /*
2501 * If we have slogs then remove them 1/4 of the time.
2502 */
2503 if (spa_has_slogs(spa) && ztest_random(4) == 0) {
2504 /*
2505 * Grab the guid from the head of the log class rotor.
2506 */
2507 guid = spa_log_class(spa)->mc_rotor->mg_vd->vdev_guid;
2508
2509 spa_config_exit(spa, SCL_VDEV, FTAG);
2510
2511 /*
2512 * We have to grab the zs_name_lock as writer to
2513 * prevent a race between removing a slog (dmu_objset_find)
2514 * and destroying a dataset. Removing the slog will
2515 * grab a reference on the dataset which may cause
2516 * dmu_objset_destroy() to fail with EBUSY thus
2517 * leaving the dataset in an inconsistent state.
2518 */
2519 VERIFY(rw_wrlock(&ztest_name_lock) == 0);
2520 error = spa_vdev_remove(spa, guid, B_FALSE);
2521 VERIFY(rw_unlock(&ztest_name_lock) == 0);
2522
2523 if (error && error != EEXIST)
2524 fatal(0, "spa_vdev_remove() = %d", error);
2525 } else {
2526 spa_config_exit(spa, SCL_VDEV, FTAG);
2527
2528 /*
2529 * Make 1/4 of the devices be log devices.
2530 */
2531 nvroot = make_vdev_root(NULL, NULL, NULL,
2532 ztest_opts.zo_vdev_size, 0,
2533 ztest_random(4) == 0, ztest_opts.zo_raidz,
2534 zs->zs_mirrors, 1);
2535
2536 error = spa_vdev_add(spa, nvroot);
2537 nvlist_free(nvroot);
2538
2539 if (error == ENOSPC)
2540 ztest_record_enospc("spa_vdev_add");
2541 else if (error != 0)
2542 fatal(0, "spa_vdev_add() = %d", error);
2543 }
2544
2545 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
2546 }
2547
2548 /*
2549 * Verify that adding/removing aux devices (l2arc, hot spare) works as expected.
2550 */
2551 /* ARGSUSED */
2552 void
2553 ztest_vdev_aux_add_remove(ztest_ds_t *zd, uint64_t id)
2554 {
2555 ztest_shared_t *zs = ztest_shared;
2556 spa_t *spa = ztest_spa;
2557 vdev_t *rvd = spa->spa_root_vdev;
2558 spa_aux_vdev_t *sav;
2559 char *aux;
2560 uint64_t guid = 0;
2561 int error;
2562
2563 if (ztest_random(2) == 0) {
2564 sav = &spa->spa_spares;
2565 aux = ZPOOL_CONFIG_SPARES;
2566 } else {
2567 sav = &spa->spa_l2cache;
2568 aux = ZPOOL_CONFIG_L2CACHE;
2569 }
2570
2571 VERIFY(mutex_lock(&ztest_vdev_lock) == 0);
2572
2573 spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
2574
2575 if (sav->sav_count != 0 && ztest_random(4) == 0) {
2576 /*
2577 * Pick a random device to remove.
2578 */
2579 guid = sav->sav_vdevs[ztest_random(sav->sav_count)]->vdev_guid;
2580 } else {
2581 /*
2582 * Find an unused device we can add.
2583 */
2584 zs->zs_vdev_aux = 0;
2585 for (;;) {
2586 char path[MAXPATHLEN];
2587 int c;
2588 (void) snprintf(path, sizeof (path), ztest_aux_template,
2589 ztest_opts.zo_dir, ztest_opts.zo_pool, aux,
2590 zs->zs_vdev_aux);
2591 for (c = 0; c < sav->sav_count; c++)
2592 if (strcmp(sav->sav_vdevs[c]->vdev_path,
2593 path) == 0)
2594 break;
2595 if (c == sav->sav_count &&
2596 vdev_lookup_by_path(rvd, path) == NULL)
2597 break;
2598 zs->zs_vdev_aux++;
2599 }
2600 }
2601
2602 spa_config_exit(spa, SCL_VDEV, FTAG);
2603
2604 if (guid == 0) {
2605 /*
2606 * Add a new device.
2607 */
2608 nvlist_t *nvroot = make_vdev_root(NULL, aux, NULL,
2609 (ztest_opts.zo_vdev_size * 5) / 4, 0, 0, 0, 0, 1);
2610 error = spa_vdev_add(spa, nvroot);
2611 if (error != 0)
2612 fatal(0, "spa_vdev_add(%p) = %d", nvroot, error);
2613 nvlist_free(nvroot);
2614 } else {
2615 /*
2616 * Remove an existing device. Sometimes, dirty its
2617 * vdev state first to make sure we handle removal
2618 * of devices that have pending state changes.
2619 */
2620 if (ztest_random(2) == 0)
2621 (void) vdev_online(spa, guid, 0, NULL);
2622
2623 error = spa_vdev_remove(spa, guid, B_FALSE);
2624 if (error != 0 && error != EBUSY)
2625 fatal(0, "spa_vdev_remove(%llu) = %d", guid, error);
2626 }
2627
2628 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
2629 }
2630
2631 /*
2632 * split a pool if it has mirror tlvdevs
2633 */
2634 /* ARGSUSED */
2635 void
2636 ztest_split_pool(ztest_ds_t *zd, uint64_t id)
2637 {
2638 ztest_shared_t *zs = ztest_shared;
2639 spa_t *spa = ztest_spa;
2640 vdev_t *rvd = spa->spa_root_vdev;
2641 nvlist_t *tree, **child, *config, *split, **schild;
2642 uint_t c, children, schildren = 0, lastlogid = 0;
2643 int error = 0;
2644
2645 VERIFY(mutex_lock(&ztest_vdev_lock) == 0);
2646
2647 /* ensure we have a useable config; mirrors of raidz aren't supported */
2648 if (zs->zs_mirrors < 3 || ztest_opts.zo_raidz > 1) {
2649 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
2650 return;
2651 }
2652
2653 /* clean up the old pool, if any */
2654 (void) spa_destroy("splitp");
2655
2656 spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
2657
2658 /* generate a config from the existing config */
2659 mutex_enter(&spa->spa_props_lock);
2660 VERIFY(nvlist_lookup_nvlist(spa->spa_config, ZPOOL_CONFIG_VDEV_TREE,
2661 &tree) == 0);
2662 mutex_exit(&spa->spa_props_lock);
2663
2664 VERIFY(nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN, &child,
2665 &children) == 0);
2666
2667 schild = malloc(rvd->vdev_children * sizeof (nvlist_t *));
2668 for (c = 0; c < children; c++) {
2669 vdev_t *tvd = rvd->vdev_child[c];
2670 nvlist_t **mchild;
2671 uint_t mchildren;
2672
2673 if (tvd->vdev_islog || tvd->vdev_ops == &vdev_hole_ops) {
2674 VERIFY(nvlist_alloc(&schild[schildren], NV_UNIQUE_NAME,
2675 0) == 0);
2676 VERIFY(nvlist_add_string(schild[schildren],
2677 ZPOOL_CONFIG_TYPE, VDEV_TYPE_HOLE) == 0);
2678 VERIFY(nvlist_add_uint64(schild[schildren],
2679 ZPOOL_CONFIG_IS_HOLE, 1) == 0);
2680 if (lastlogid == 0)
2681 lastlogid = schildren;
2682 ++schildren;
2683 continue;
2684 }
2685 lastlogid = 0;
2686 VERIFY(nvlist_lookup_nvlist_array(child[c],
2687 ZPOOL_CONFIG_CHILDREN, &mchild, &mchildren) == 0);
2688 VERIFY(nvlist_dup(mchild[0], &schild[schildren++], 0) == 0);
2689 }
2690
2691 /* OK, create a config that can be used to split */
2692 VERIFY(nvlist_alloc(&split, NV_UNIQUE_NAME, 0) == 0);
2693 VERIFY(nvlist_add_string(split, ZPOOL_CONFIG_TYPE,
2694 VDEV_TYPE_ROOT) == 0);
2695 VERIFY(nvlist_add_nvlist_array(split, ZPOOL_CONFIG_CHILDREN, schild,
2696 lastlogid != 0 ? lastlogid : schildren) == 0);
2697
2698 VERIFY(nvlist_alloc(&config, NV_UNIQUE_NAME, 0) == 0);
2699 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, split) == 0);
2700
2701 for (c = 0; c < schildren; c++)
2702 nvlist_free(schild[c]);
2703 free(schild);
2704 nvlist_free(split);
2705
2706 spa_config_exit(spa, SCL_VDEV, FTAG);
2707
2708 (void) rw_wrlock(&ztest_name_lock);
2709 error = spa_vdev_split_mirror(spa, "splitp", config, NULL, B_FALSE);
2710 (void) rw_unlock(&ztest_name_lock);
2711
2712 nvlist_free(config);
2713
2714 if (error == 0) {
2715 (void) printf("successful split - results:\n");
2716 mutex_enter(&spa_namespace_lock);
2717 show_pool_stats(spa);
2718 show_pool_stats(spa_lookup("splitp"));
2719 mutex_exit(&spa_namespace_lock);
2720 ++zs->zs_splits;
2721 --zs->zs_mirrors;
2722 }
2723 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
2724
2725 }
2726
2727 /*
2728 * Verify that we can attach and detach devices.
2729 */
2730 /* ARGSUSED */
2731 void
2732 ztest_vdev_attach_detach(ztest_ds_t *zd, uint64_t id)
2733 {
2734 ztest_shared_t *zs = ztest_shared;
2735 spa_t *spa = ztest_spa;
2736 spa_aux_vdev_t *sav = &spa->spa_spares;
2737 vdev_t *rvd = spa->spa_root_vdev;
2738 vdev_t *oldvd, *newvd, *pvd;
2739 nvlist_t *root;
2740 uint64_t leaves;
2741 uint64_t leaf, top;
2742 uint64_t ashift = ztest_get_ashift();
2743 uint64_t oldguid, pguid;
2744 uint64_t oldsize, newsize;
2745 char oldpath[MAXPATHLEN], newpath[MAXPATHLEN];
2746 int replacing;
2747 int oldvd_has_siblings = B_FALSE;
2748 int newvd_is_spare = B_FALSE;
2749 int oldvd_is_log;
2750 int error, expected_error;
2751
2752 VERIFY(mutex_lock(&ztest_vdev_lock) == 0);
2753 leaves = MAX(zs->zs_mirrors, 1) * ztest_opts.zo_raidz;
2754
2755 spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER);
2756
2757 /*
2758 * Decide whether to do an attach or a replace.
2759 */
2760 replacing = ztest_random(2);
2761
2762 /*
2763 * Pick a random top-level vdev.
2764 */
2765 top = ztest_random_vdev_top(spa, B_TRUE);
2766
2767 /*
2768 * Pick a random leaf within it.
2769 */
2770 leaf = ztest_random(leaves);
2771
2772 /*
2773 * Locate this vdev.
2774 */
2775 oldvd = rvd->vdev_child[top];
2776 if (zs->zs_mirrors >= 1) {
2777 ASSERT(oldvd->vdev_ops == &vdev_mirror_ops);
2778 ASSERT(oldvd->vdev_children >= zs->zs_mirrors);
2779 oldvd = oldvd->vdev_child[leaf / ztest_opts.zo_raidz];
2780 }
2781 if (ztest_opts.zo_raidz > 1) {
2782 ASSERT(oldvd->vdev_ops == &vdev_raidz_ops);
2783 ASSERT(oldvd->vdev_children == ztest_opts.zo_raidz);
2784 oldvd = oldvd->vdev_child[leaf % ztest_opts.zo_raidz];
2785 }
2786
2787 /*
2788 * If we're already doing an attach or replace, oldvd may be a
2789 * mirror vdev -- in which case, pick a random child.
2790 */
2791 while (oldvd->vdev_children != 0) {
2792 oldvd_has_siblings = B_TRUE;
2793 ASSERT(oldvd->vdev_children >= 2);
2794 oldvd = oldvd->vdev_child[ztest_random(oldvd->vdev_children)];
2795 }
2796
2797 oldguid = oldvd->vdev_guid;
2798 oldsize = vdev_get_min_asize(oldvd);
2799 oldvd_is_log = oldvd->vdev_top->vdev_islog;
2800 (void) strcpy(oldpath, oldvd->vdev_path);
2801 pvd = oldvd->vdev_parent;
2802 pguid = pvd->vdev_guid;
2803
2804 /*
2805 * If oldvd has siblings, then half of the time, detach it.
2806 */
2807 if (oldvd_has_siblings && ztest_random(2) == 0) {
2808 spa_config_exit(spa, SCL_VDEV, FTAG);
2809 error = spa_vdev_detach(spa, oldguid, pguid, B_FALSE);
2810 if (error != 0 && error != ENODEV && error != EBUSY &&
2811 error != ENOTSUP)
2812 fatal(0, "detach (%s) returned %d", oldpath, error);
2813 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
2814 return;
2815 }
2816
2817 /*
2818 * For the new vdev, choose with equal probability between the two
2819 * standard paths (ending in either 'a' or 'b') or a random hot spare.
2820 */
2821 if (sav->sav_count != 0 && ztest_random(3) == 0) {
2822 newvd = sav->sav_vdevs[ztest_random(sav->sav_count)];
2823 newvd_is_spare = B_TRUE;
2824 (void) strcpy(newpath, newvd->vdev_path);
2825 } else {
2826 (void) snprintf(newpath, sizeof (newpath), ztest_dev_template,
2827 ztest_opts.zo_dir, ztest_opts.zo_pool,
2828 top * leaves + leaf);
2829 if (ztest_random(2) == 0)
2830 newpath[strlen(newpath) - 1] = 'b';
2831 newvd = vdev_lookup_by_path(rvd, newpath);
2832 }
2833
2834 if (newvd) {
2835 newsize = vdev_get_min_asize(newvd);
2836 } else {
2837 /*
2838 * Make newsize a little bigger or smaller than oldsize.
2839 * If it's smaller, the attach should fail.
2840 * If it's larger, and we're doing a replace,
2841 * we should get dynamic LUN growth when we're done.
2842 */
2843 newsize = 10 * oldsize / (9 + ztest_random(3));
2844 }
2845
2846 /*
2847 * If pvd is not a mirror or root, the attach should fail with ENOTSUP,
2848 * unless it's a replace; in that case any non-replacing parent is OK.
2849 *
2850 * If newvd is already part of the pool, it should fail with EBUSY.
2851 *
2852 * If newvd is too small, it should fail with EOVERFLOW.
2853 */
2854 if (pvd->vdev_ops != &vdev_mirror_ops &&
2855 pvd->vdev_ops != &vdev_root_ops && (!replacing ||
2856 pvd->vdev_ops == &vdev_replacing_ops ||
2857 pvd->vdev_ops == &vdev_spare_ops))
2858 expected_error = ENOTSUP;
2859 else if (newvd_is_spare && (!replacing || oldvd_is_log))
2860 expected_error = ENOTSUP;
2861 else if (newvd == oldvd)
2862 expected_error = replacing ? 0 : EBUSY;
2863 else if (vdev_lookup_by_path(rvd, newpath) != NULL)
2864 expected_error = EBUSY;
2865 else if (newsize < oldsize)
2866 expected_error = EOVERFLOW;
2867 else if (ashift > oldvd->vdev_top->vdev_ashift)
2868 expected_error = EDOM;
2869 else
2870 expected_error = 0;
2871
2872 spa_config_exit(spa, SCL_VDEV, FTAG);
2873
2874 /*
2875 * Build the nvlist describing newpath.
2876 */
2877 root = make_vdev_root(newpath, NULL, NULL, newvd == NULL ? newsize : 0,
2878 ashift, 0, 0, 0, 1);
2879
2880 error = spa_vdev_attach(spa, oldguid, root, replacing);
2881
2882 nvlist_free(root);
2883
2884 /*
2885 * If our parent was the replacing vdev, but the replace completed,
2886 * then instead of failing with ENOTSUP we may either succeed,
2887 * fail with ENODEV, or fail with EOVERFLOW.
2888 */
2889 if (expected_error == ENOTSUP &&
2890 (error == 0 || error == ENODEV || error == EOVERFLOW))
2891 expected_error = error;
2892
2893 /*
2894 * If someone grew the LUN, the replacement may be too small.
2895 */
2896 if (error == EOVERFLOW || error == EBUSY)
2897 expected_error = error;
2898
2899 /* XXX workaround 6690467 */
2900 if (error != expected_error && expected_error != EBUSY) {
2901 fatal(0, "attach (%s %llu, %s %llu, %d) "
2902 "returned %d, expected %d",
2903 oldpath, oldsize, newpath,
2904 newsize, replacing, error, expected_error);
2905 }
2906
2907 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
2908 }
2909
2910 /*
2911 * Callback function which expands the physical size of the vdev.
2912 */
2913 vdev_t *
2914 grow_vdev(vdev_t *vd, void *arg)
2915 {
2916 spa_t *spa = vd->vdev_spa;
2917 size_t *newsize = arg;
2918 size_t fsize;
2919 int fd;
2920
2921 ASSERT(spa_config_held(spa, SCL_STATE, RW_READER) == SCL_STATE);
2922 ASSERT(vd->vdev_ops->vdev_op_leaf);
2923
2924 if ((fd = open(vd->vdev_path, O_RDWR)) == -1)
2925 return (vd);
2926
2927 fsize = lseek(fd, 0, SEEK_END);
2928 (void) ftruncate(fd, *newsize);
2929
2930 if (ztest_opts.zo_verbose >= 6) {
2931 (void) printf("%s grew from %lu to %lu bytes\n",
2932 vd->vdev_path, (ulong_t)fsize, (ulong_t)*newsize);
2933 }
2934 (void) close(fd);
2935 return (NULL);
2936 }
2937
2938 /*
2939 * Callback function which expands a given vdev by calling vdev_online().
2940 */
2941 /* ARGSUSED */
2942 vdev_t *
2943 online_vdev(vdev_t *vd, void *arg)
2944 {
2945 spa_t *spa = vd->vdev_spa;
2946 vdev_t *tvd = vd->vdev_top;
2947 uint64_t guid = vd->vdev_guid;
2948 uint64_t generation = spa->spa_config_generation + 1;
2949 vdev_state_t newstate = VDEV_STATE_UNKNOWN;
2950 int error;
2951
2952 ASSERT(spa_config_held(spa, SCL_STATE, RW_READER) == SCL_STATE);
2953 ASSERT(vd->vdev_ops->vdev_op_leaf);
2954
2955 /* Calling vdev_online will initialize the new metaslabs */
2956 spa_config_exit(spa, SCL_STATE, spa);
2957 error = vdev_online(spa, guid, ZFS_ONLINE_EXPAND, &newstate);
2958 spa_config_enter(spa, SCL_STATE, spa, RW_READER);
2959
2960 /*
2961 * If vdev_online returned an error or the underlying vdev_open
2962 * failed then we abort the expand. The only way to know that
2963 * vdev_open fails is by checking the returned newstate.
2964 */
2965 if (error || newstate != VDEV_STATE_HEALTHY) {
2966 if (ztest_opts.zo_verbose >= 5) {
2967 (void) printf("Unable to expand vdev, state %llu, "
2968 "error %d\n", (u_longlong_t)newstate, error);
2969 }
2970 return (vd);
2971 }
2972 ASSERT3U(newstate, ==, VDEV_STATE_HEALTHY);
2973
2974 /*
2975 * Since we dropped the lock we need to ensure that we're
2976 * still talking to the original vdev. It's possible this
2977 * vdev may have been detached/replaced while we were
2978 * trying to online it.
2979 */
2980 if (generation != spa->spa_config_generation) {
2981 if (ztest_opts.zo_verbose >= 5) {
2982 (void) printf("vdev configuration has changed, "
2983 "guid %llu, state %llu, expected gen %llu, "
2984 "got gen %llu\n",
2985 (u_longlong_t)guid,
2986 (u_longlong_t)tvd->vdev_state,
2987 (u_longlong_t)generation,
2988 (u_longlong_t)spa->spa_config_generation);
2989 }
2990 return (vd);
2991 }
2992 return (NULL);
2993 }
2994
2995 /*
2996 * Traverse the vdev tree calling the supplied function.
2997 * We continue to walk the tree until we either have walked all
2998 * children or we receive a non-NULL return from the callback.
2999 * If a NULL callback is passed, then we just return back the first
3000 * leaf vdev we encounter.
3001 */
3002 vdev_t *
3003 vdev_walk_tree(vdev_t *vd, vdev_t *(*func)(vdev_t *, void *), void *arg)
3004 {
3005 if (vd->vdev_ops->vdev_op_leaf) {
3006 if (func == NULL)
3007 return (vd);
3008 else
3009 return (func(vd, arg));
3010 }
3011
3012 for (uint_t c = 0; c < vd->vdev_children; c++) {
3013 vdev_t *cvd = vd->vdev_child[c];
3014 if ((cvd = vdev_walk_tree(cvd, func, arg)) != NULL)
3015 return (cvd);
3016 }
3017 return (NULL);
3018 }
3019
3020 /*
3021 * Verify that dynamic LUN growth works as expected.
3022 */
3023 /* ARGSUSED */
3024 void
3025 ztest_vdev_LUN_growth(ztest_ds_t *zd, uint64_t id)
3026 {
3027 spa_t *spa = ztest_spa;
3028 vdev_t *vd, *tvd;
3029 metaslab_class_t *mc;
3030 metaslab_group_t *mg;
3031 size_t psize, newsize;
3032 uint64_t top;
3033 uint64_t old_class_space, new_class_space, old_ms_count, new_ms_count;
3034
3035 VERIFY(mutex_lock(&ztest_vdev_lock) == 0);
3036 spa_config_enter(spa, SCL_STATE, spa, RW_READER);
3037
3038 top = ztest_random_vdev_top(spa, B_TRUE);
3039
3040 tvd = spa->spa_root_vdev->vdev_child[top];
3041 mg = tvd->vdev_mg;
3042 mc = mg->mg_class;
3043 old_ms_count = tvd->vdev_ms_count;
3044 old_class_space = metaslab_class_get_space(mc);
3045
3046 /*
3047 * Determine the size of the first leaf vdev associated with
3048 * our top-level device.
3049 */
3050 vd = vdev_walk_tree(tvd, NULL, NULL);
3051 ASSERT3P(vd, !=, NULL);
3052 ASSERT(vd->vdev_ops->vdev_op_leaf);
3053
3054 psize = vd->vdev_psize;
3055
3056 /*
3057 * We only try to expand the vdev if it's healthy, less than 4x its
3058 * original size, and it has a valid psize.
3059 */
3060 if (tvd->vdev_state != VDEV_STATE_HEALTHY ||
3061 psize == 0 || psize >= 4 * ztest_opts.zo_vdev_size) {
3062 spa_config_exit(spa, SCL_STATE, spa);
3063 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
3064 return;
3065 }
3066 ASSERT(psize > 0);
3067 newsize = psize + psize / 8;
3068 ASSERT3U(newsize, >, psize);
3069
3070 if (ztest_opts.zo_verbose >= 6) {
3071 (void) printf("Expanding LUN %s from %lu to %lu\n",
3072 vd->vdev_path, (ulong_t)psize, (ulong_t)newsize);
3073 }
3074
3075 /*
3076 * Growing the vdev is a two step process:
3077 * 1). expand the physical size (i.e. relabel)
3078 * 2). online the vdev to create the new metaslabs
3079 */
3080 if (vdev_walk_tree(tvd, grow_vdev, &newsize) != NULL ||
3081 vdev_walk_tree(tvd, online_vdev, NULL) != NULL ||
3082 tvd->vdev_state != VDEV_STATE_HEALTHY) {
3083 if (ztest_opts.zo_verbose >= 5) {
3084 (void) printf("Could not expand LUN because "
3085 "the vdev configuration changed.\n");
3086 }
3087 spa_config_exit(spa, SCL_STATE, spa);
3088 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
3089 return;
3090 }
3091
3092 spa_config_exit(spa, SCL_STATE, spa);
3093
3094 /*
3095 * Expanding the LUN will update the config asynchronously,
3096 * thus we must wait for the async thread to complete any
3097 * pending tasks before proceeding.
3098 */
3099 for (;;) {
3100 boolean_t done;
3101 mutex_enter(&spa->spa_async_lock);
3102 done = (spa->spa_async_thread == NULL && !spa->spa_async_tasks);
3103 mutex_exit(&spa->spa_async_lock);
3104 if (done)
3105 break;
3106 txg_wait_synced(spa_get_dsl(spa), 0);
3107 (void) poll(NULL, 0, 100);
3108 }
3109
3110 spa_config_enter(spa, SCL_STATE, spa, RW_READER);
3111
3112 tvd = spa->spa_root_vdev->vdev_child[top];
3113 new_ms_count = tvd->vdev_ms_count;
3114 new_class_space = metaslab_class_get_space(mc);
3115
3116 if (tvd->vdev_mg != mg || mg->mg_class != mc) {
3117 if (ztest_opts.zo_verbose >= 5) {
3118 (void) printf("Could not verify LUN expansion due to "
3119 "intervening vdev offline or remove.\n");
3120 }
3121 spa_config_exit(spa, SCL_STATE, spa);
3122 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
3123 return;
3124 }
3125
3126 /*
3127 * Make sure we were able to grow the vdev.
3128 */
3129 if (new_ms_count <= old_ms_count)
3130 fatal(0, "LUN expansion failed: ms_count %llu <= %llu\n",
3131 old_ms_count, new_ms_count);
3132
3133 /*
3134 * Make sure we were able to grow the pool.
3135 */
3136 if (new_class_space <= old_class_space)
3137 fatal(0, "LUN expansion failed: class_space %llu <= %llu\n",
3138 old_class_space, new_class_space);
3139
3140 if (ztest_opts.zo_verbose >= 5) {
3141 char oldnumbuf[6], newnumbuf[6];
3142
3143 nicenum(old_class_space, oldnumbuf);
3144 nicenum(new_class_space, newnumbuf);
3145 (void) printf("%s grew from %s to %s\n",
3146 spa->spa_name, oldnumbuf, newnumbuf);
3147 }
3148
3149 spa_config_exit(spa, SCL_STATE, spa);
3150 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
3151 }
3152
3153 /*
3154 * Verify that dmu_objset_{create,destroy,open,close} work as expected.
3155 */
3156 /* ARGSUSED */
3157 static void
3158 ztest_objset_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx)
3159 {
3160 /*
3161 * Create the objects common to all ztest datasets.
3162 */
3163 VERIFY(zap_create_claim(os, ZTEST_DIROBJ,
3164 DMU_OT_ZAP_OTHER, DMU_OT_NONE, 0, tx) == 0);
3165 }
3166
3167 static int
3168 ztest_dataset_create(char *dsname)
3169 {
3170 uint64_t zilset = ztest_random(100);
3171 int err = dmu_objset_create(dsname, DMU_OST_OTHER, 0,
3172 ztest_objset_create_cb, NULL);
3173
3174 if (err || zilset < 80)
3175 return (err);
3176
3177 if (ztest_opts.zo_verbose >= 6)
3178 (void) printf("Setting dataset %s to sync always\n", dsname);
3179 return (ztest_dsl_prop_set_uint64(dsname, ZFS_PROP_SYNC,
3180 ZFS_SYNC_ALWAYS, B_FALSE));
3181 }
3182
3183 /* ARGSUSED */
3184 static int
3185 ztest_objset_destroy_cb(const char *name, void *arg)
3186 {
3187 objset_t *os;
3188 dmu_object_info_t doi;
3189 int error;
3190
3191 /*
3192 * Verify that the dataset contains a directory object.
3193 */
3194 VERIFY0(dmu_objset_own(name, DMU_OST_OTHER, B_TRUE, FTAG, &os));
3195 error = dmu_object_info(os, ZTEST_DIROBJ, &doi);
3196 if (error != ENOENT) {
3197 /* We could have crashed in the middle of destroying it */
3198 ASSERT0(error);
3199 ASSERT3U(doi.doi_type, ==, DMU_OT_ZAP_OTHER);
3200 ASSERT3S(doi.doi_physical_blocks_512, >=, 0);
3201 }
3202 dmu_objset_disown(os, FTAG);
3203
3204 /*
3205 * Destroy the dataset.
3206 */
3207 if (strchr(name, '@') != NULL) {
3208 VERIFY0(dsl_destroy_snapshot(name, B_FALSE));
3209 } else {
3210 VERIFY0(dsl_destroy_head(name));
3211 }
3212 return (0);
3213 }
3214
3215 static boolean_t
3216 ztest_snapshot_create(char *osname, uint64_t id)
3217 {
3218 char snapname[MAXNAMELEN];
3219 int error;
3220
3221 (void) snprintf(snapname, sizeof (snapname), "%llu", (u_longlong_t)id);
3222
3223 error = dmu_objset_snapshot_one(osname, snapname);
3224 if (error == ENOSPC) {
3225 ztest_record_enospc(FTAG);
3226 return (B_FALSE);
3227 }
3228 if (error != 0 && error != EEXIST) {
3229 fatal(0, "ztest_snapshot_create(%s@%s) = %d", osname,
3230 snapname, error);
3231 }
3232 return (B_TRUE);
3233 }
3234
3235 static boolean_t
3236 ztest_snapshot_destroy(char *osname, uint64_t id)
3237 {
3238 char snapname[MAXNAMELEN];
3239 int error;
3240
3241 (void) snprintf(snapname, MAXNAMELEN, "%s@%llu", osname,
3242 (u_longlong_t)id);
3243
3244 error = dsl_destroy_snapshot(snapname, B_FALSE);
3245 if (error != 0 && error != ENOENT)
3246 fatal(0, "ztest_snapshot_destroy(%s) = %d", snapname, error);
3247 return (B_TRUE);
3248 }
3249
3250 /* ARGSUSED */
3251 void
3252 ztest_dmu_objset_create_destroy(ztest_ds_t *zd, uint64_t id)
3253 {
3254 ztest_ds_t zdtmp;
3255 int iters;
3256 int error;
3257 objset_t *os, *os2;
3258 char name[MAXNAMELEN];
3259 zilog_t *zilog;
3260
3261 (void) rw_rdlock(&ztest_name_lock);
3262
3263 (void) snprintf(name, MAXNAMELEN, "%s/temp_%llu",
3264 ztest_opts.zo_pool, (u_longlong_t)id);
3265
3266 /*
3267 * If this dataset exists from a previous run, process its replay log
3268 * half of the time. If we don't replay it, then dmu_objset_destroy()
3269 * (invoked from ztest_objset_destroy_cb()) should just throw it away.
3270 */
3271 if (ztest_random(2) == 0 &&
3272 dmu_objset_own(name, DMU_OST_OTHER, B_FALSE, FTAG, &os) == 0) {
3273 ztest_zd_init(&zdtmp, NULL, os);
3274 zil_replay(os, &zdtmp, ztest_replay_vector);
3275 ztest_zd_fini(&zdtmp);
3276 dmu_objset_disown(os, FTAG);
3277 }
3278
3279 /*
3280 * There may be an old instance of the dataset we're about to
3281 * create lying around from a previous run. If so, destroy it
3282 * and all of its snapshots.
3283 */
3284 (void) dmu_objset_find(name, ztest_objset_destroy_cb, NULL,
3285 DS_FIND_CHILDREN | DS_FIND_SNAPSHOTS);
3286
3287 /*
3288 * Verify that the destroyed dataset is no longer in the namespace.
3289 */
3290 VERIFY3U(ENOENT, ==, dmu_objset_own(name, DMU_OST_OTHER, B_TRUE,
3291 FTAG, &os));
3292
3293 /*
3294 * Verify that we can create a new dataset.
3295 */
3296 error = ztest_dataset_create(name);
3297 if (error) {
3298 if (error == ENOSPC) {
3299 ztest_record_enospc(FTAG);
3300 (void) rw_unlock(&ztest_name_lock);
3301 return;
3302 }
3303 fatal(0, "dmu_objset_create(%s) = %d", name, error);
3304 }
3305
3306 VERIFY0(dmu_objset_own(name, DMU_OST_OTHER, B_FALSE, FTAG, &os));
3307
3308 ztest_zd_init(&zdtmp, NULL, os);
3309
3310 /*
3311 * Open the intent log for it.
3312 */
3313 zilog = zil_open(os, ztest_get_data);
3314
3315 /*
3316 * Put some objects in there, do a little I/O to them,
3317 * and randomly take a couple of snapshots along the way.
3318 */
3319 iters = ztest_random(5);
3320 for (int i = 0; i < iters; i++) {
3321 ztest_dmu_object_alloc_free(&zdtmp, id);
3322 if (ztest_random(iters) == 0)
3323 (void) ztest_snapshot_create(name, i);
3324 }
3325
3326 /*
3327 * Verify that we cannot create an existing dataset.
3328 */
3329 VERIFY3U(EEXIST, ==,
3330 dmu_objset_create(name, DMU_OST_OTHER, 0, NULL, NULL));
3331
3332 /*
3333 * Verify that we can hold an objset that is also owned.
3334 */
3335 VERIFY3U(0, ==, dmu_objset_hold(name, FTAG, &os2));
3336 dmu_objset_rele(os2, FTAG);
3337
3338 /*
3339 * Verify that we cannot own an objset that is already owned.
3340 */
3341 VERIFY3U(EBUSY, ==,
3342 dmu_objset_own(name, DMU_OST_OTHER, B_FALSE, FTAG, &os2));
3343
3344 zil_close(zilog);
3345 dmu_objset_disown(os, FTAG);
3346 ztest_zd_fini(&zdtmp);
3347
3348 (void) rw_unlock(&ztest_name_lock);
3349 }
3350
3351 /*
3352 * Verify that dmu_snapshot_{create,destroy,open,close} work as expected.
3353 */
3354 void
3355 ztest_dmu_snapshot_create_destroy(ztest_ds_t *zd, uint64_t id)
3356 {
3357 (void) rw_rdlock(&ztest_name_lock);
3358 (void) ztest_snapshot_destroy(zd->zd_name, id);
3359 (void) ztest_snapshot_create(zd->zd_name, id);
3360 (void) rw_unlock(&ztest_name_lock);
3361 }
3362
3363 /*
3364 * Cleanup non-standard snapshots and clones.
3365 */
3366 void
3367 ztest_dsl_dataset_cleanup(char *osname, uint64_t id)
3368 {
3369 char snap1name[MAXNAMELEN];
3370 char clone1name[MAXNAMELEN];
3371 char snap2name[MAXNAMELEN];
3372 char clone2name[MAXNAMELEN];
3373 char snap3name[MAXNAMELEN];
3374 int error;
3375
3376 (void) snprintf(snap1name, MAXNAMELEN, "%s@s1_%llu", osname, id);
3377 (void) snprintf(clone1name, MAXNAMELEN, "%s/c1_%llu", osname, id);
3378 (void) snprintf(snap2name, MAXNAMELEN, "%s@s2_%llu", clone1name, id);
3379 (void) snprintf(clone2name, MAXNAMELEN, "%s/c2_%llu", osname, id);
3380 (void) snprintf(snap3name, MAXNAMELEN, "%s@s3_%llu", clone1name, id);
3381
3382 error = dsl_destroy_head(clone2name);
3383 if (error && error != ENOENT)
3384 fatal(0, "dsl_destroy_head(%s) = %d", clone2name, error);
3385 error = dsl_destroy_snapshot(snap3name, B_FALSE);
3386 if (error && error != ENOENT)
3387 fatal(0, "dsl_destroy_snapshot(%s) = %d", snap3name, error);
3388 error = dsl_destroy_snapshot(snap2name, B_FALSE);
3389 if (error && error != ENOENT)
3390 fatal(0, "dsl_destroy_snapshot(%s) = %d", snap2name, error);
3391 error = dsl_destroy_head(clone1name);
3392 if (error && error != ENOENT)
3393 fatal(0, "dsl_destroy_head(%s) = %d", clone1name, error);
3394 error = dsl_destroy_snapshot(snap1name, B_FALSE);
3395 if (error && error != ENOENT)
3396 fatal(0, "dsl_destroy_snapshot(%s) = %d", snap1name, error);
3397 }
3398
3399 /*
3400 * Verify dsl_dataset_promote handles EBUSY
3401 */
3402 void
3403 ztest_dsl_dataset_promote_busy(ztest_ds_t *zd, uint64_t id)
3404 {
3405 objset_t *os;
3406 char snap1name[MAXNAMELEN];
3407 char clone1name[MAXNAMELEN];
3408 char snap2name[MAXNAMELEN];
3409 char clone2name[MAXNAMELEN];
3410 char snap3name[MAXNAMELEN];
3411 char *osname = zd->zd_name;
3412 int error;
3413
3414 (void) rw_rdlock(&ztest_name_lock);
3415
3416 ztest_dsl_dataset_cleanup(osname, id);
3417
3418 (void) snprintf(snap1name, MAXNAMELEN, "%s@s1_%llu", osname, id);
3419 (void) snprintf(clone1name, MAXNAMELEN, "%s/c1_%llu", osname, id);
3420 (void) snprintf(snap2name, MAXNAMELEN, "%s@s2_%llu", clone1name, id);
3421 (void) snprintf(clone2name, MAXNAMELEN, "%s/c2_%llu", osname, id);
3422 (void) snprintf(snap3name, MAXNAMELEN, "%s@s3_%llu", clone1name, id);
3423
3424 error = dmu_objset_snapshot_one(osname, strchr(snap1name, '@') + 1);
3425 if (error && error != EEXIST) {
3426 if (error == ENOSPC) {
3427 ztest_record_enospc(FTAG);
3428 goto out;
3429 }
3430 fatal(0, "dmu_take_snapshot(%s) = %d", snap1name, error);
3431 }
3432
3433 error = dmu_objset_clone(clone1name, snap1name);
3434 if (error) {
3435 if (error == ENOSPC) {
3436 ztest_record_enospc(FTAG);
3437 goto out;
3438 }
3439 fatal(0, "dmu_objset_create(%s) = %d", clone1name, error);
3440 }
3441
3442 error = dmu_objset_snapshot_one(clone1name, strchr(snap2name, '@') + 1);
3443 if (error && error != EEXIST) {
3444 if (error == ENOSPC) {
3445 ztest_record_enospc(FTAG);
3446 goto out;
3447 }
3448 fatal(0, "dmu_open_snapshot(%s) = %d", snap2name, error);
3449 }
3450
3451 error = dmu_objset_snapshot_one(clone1name, strchr(snap3name, '@') + 1);
3452 if (error && error != EEXIST) {
3453 if (error == ENOSPC) {
3454 ztest_record_enospc(FTAG);
3455 goto out;
3456 }
3457 fatal(0, "dmu_open_snapshot(%s) = %d", snap3name, error);
3458 }
3459
3460 error = dmu_objset_clone(clone2name, snap3name);
3461 if (error) {
3462 if (error == ENOSPC) {
3463 ztest_record_enospc(FTAG);
3464 goto out;
3465 }
3466 fatal(0, "dmu_objset_create(%s) = %d", clone2name, error);
3467 }
3468
3469 error = dmu_objset_own(snap2name, DMU_OST_ANY, B_TRUE, FTAG, &os);
3470 if (error)
3471 fatal(0, "dmu_objset_own(%s) = %d", snap2name, error);
3472 error = dsl_dataset_promote(clone2name, NULL);
3473 if (error == ENOSPC) {
3474 dmu_objset_disown(os, FTAG);
3475 ztest_record_enospc(FTAG);
3476 goto out;
3477 }
3478 if (error != EBUSY)
3479 fatal(0, "dsl_dataset_promote(%s), %d, not EBUSY", clone2name,
3480 error);
3481 dmu_objset_disown(os, FTAG);
3482
3483 out:
3484 ztest_dsl_dataset_cleanup(osname, id);
3485
3486 (void) rw_unlock(&ztest_name_lock);
3487 }
3488
3489 /*
3490 * Verify that dmu_object_{alloc,free} work as expected.
3491 */
3492 void
3493 ztest_dmu_object_alloc_free(ztest_ds_t *zd, uint64_t id)
3494 {
3495 ztest_od_t od[4];
3496 int batchsize = sizeof (od) / sizeof (od[0]);
3497
3498 for (int b = 0; b < batchsize; b++)
3499 ztest_od_init(&od[b], id, FTAG, b, DMU_OT_UINT64_OTHER, 0, 0);
3500
3501 /*
3502 * Destroy the previous batch of objects, create a new batch,
3503 * and do some I/O on the new objects.
3504 */
3505 if (ztest_object_init(zd, od, sizeof (od), B_TRUE) != 0)
3506 return;
3507
3508 while (ztest_random(4 * batchsize) != 0)
3509 ztest_io(zd, od[ztest_random(batchsize)].od_object,
3510 ztest_random(ZTEST_RANGE_LOCKS) << SPA_MAXBLOCKSHIFT);
3511 }
3512
3513 /*
3514 * Verify that dmu_{read,write} work as expected.
3515 */
3516 void
3517 ztest_dmu_read_write(ztest_ds_t *zd, uint64_t id)
3518 {
3519 objset_t *os = zd->zd_os;
3520 ztest_od_t od[2];
3521 dmu_tx_t *tx;
3522 int i, freeit, error;
3523 uint64_t n, s, txg;
3524 bufwad_t *packbuf, *bigbuf, *pack, *bigH, *bigT;
3525 uint64_t packobj, packoff, packsize, bigobj, bigoff, bigsize;
3526 uint64_t chunksize = (1000 + ztest_random(1000)) * sizeof (uint64_t);
3527 uint64_t regions = 997;
3528 uint64_t stride = 123456789ULL;
3529 uint64_t width = 40;
3530 int free_percent = 5;
3531
3532 /*
3533 * This test uses two objects, packobj and bigobj, that are always
3534 * updated together (i.e. in the same tx) so that their contents are
3535 * in sync and can be compared. Their contents relate to each other
3536 * in a simple way: packobj is a dense array of 'bufwad' structures,
3537 * while bigobj is a sparse array of the same bufwads. Specifically,
3538 * for any index n, there are three bufwads that should be identical:
3539 *
3540 * packobj, at offset n * sizeof (bufwad_t)
3541 * bigobj, at the head of the nth chunk
3542 * bigobj, at the tail of the nth chunk
3543 *
3544 * The chunk size is arbitrary. It doesn't have to be a power of two,
3545 * and it doesn't have any relation to the object blocksize.
3546 * The only requirement is that it can hold at least two bufwads.
3547 *
3548 * Normally, we write the bufwad to each of these locations.
3549 * However, free_percent of the time we instead write zeroes to
3550 * packobj and perform a dmu_free_range() on bigobj. By comparing
3551 * bigobj to packobj, we can verify that the DMU is correctly
3552 * tracking which parts of an object are allocated and free,
3553 * and that the contents of the allocated blocks are correct.
3554 */
3555
3556 /*
3557 * Read the directory info. If it's the first time, set things up.
3558 */
3559 ztest_od_init(&od[0], id, FTAG, 0, DMU_OT_UINT64_OTHER, 0, chunksize);
3560 ztest_od_init(&od[1], id, FTAG, 1, DMU_OT_UINT64_OTHER, 0, chunksize);
3561
3562 if (ztest_object_init(zd, od, sizeof (od), B_FALSE) != 0)
3563 return;
3564
3565 bigobj = od[0].od_object;
3566 packobj = od[1].od_object;
3567 chunksize = od[0].od_gen;
3568 ASSERT(chunksize == od[1].od_gen);
3569
3570 /*
3571 * Prefetch a random chunk of the big object.
3572 * Our aim here is to get some async reads in flight
3573 * for blocks that we may free below; the DMU should
3574 * handle this race correctly.
3575 */
3576 n = ztest_random(regions) * stride + ztest_random(width);
3577 s = 1 + ztest_random(2 * width - 1);
3578 dmu_prefetch(os, bigobj, n * chunksize, s * chunksize);
3579
3580 /*
3581 * Pick a random index and compute the offsets into packobj and bigobj.
3582 */
3583 n = ztest_random(regions) * stride + ztest_random(width);
3584 s = 1 + ztest_random(width - 1);
3585
3586 packoff = n * sizeof (bufwad_t);
3587 packsize = s * sizeof (bufwad_t);
3588
3589 bigoff = n * chunksize;
3590 bigsize = s * chunksize;
3591
3592 packbuf = umem_alloc(packsize, UMEM_NOFAIL);
3593 bigbuf = umem_alloc(bigsize, UMEM_NOFAIL);
3594
3595 /*
3596 * free_percent of the time, free a range of bigobj rather than
3597 * overwriting it.
3598 */
3599 freeit = (ztest_random(100) < free_percent);
3600
3601 /*
3602 * Read the current contents of our objects.
3603 */
3604 error = dmu_read(os, packobj, packoff, packsize, packbuf,
3605 DMU_READ_PREFETCH);
3606 ASSERT0(error);
3607 error = dmu_read(os, bigobj, bigoff, bigsize, bigbuf,
3608 DMU_READ_PREFETCH);
3609 ASSERT0(error);
3610
3611 /*
3612 * Get a tx for the mods to both packobj and bigobj.
3613 */
3614 tx = dmu_tx_create(os);
3615
3616 dmu_tx_hold_write(tx, packobj, packoff, packsize);
3617
3618 if (freeit)
3619 dmu_tx_hold_free(tx, bigobj, bigoff, bigsize);
3620 else
3621 dmu_tx_hold_write(tx, bigobj, bigoff, bigsize);
3622
3623 /* This accounts for setting the checksum/compression. */
3624 dmu_tx_hold_bonus(tx, bigobj);
3625
3626 txg = ztest_tx_assign(tx, TXG_MIGHTWAIT, FTAG);
3627 if (txg == 0) {
3628 umem_free(packbuf, packsize);
3629 umem_free(bigbuf, bigsize);
3630 return;
3631 }
3632
3633 enum zio_checksum cksum;
3634 do {
3635 cksum = (enum zio_checksum)
3636 ztest_random_dsl_prop(ZFS_PROP_CHECKSUM);
3637 } while (cksum >= ZIO_CHECKSUM_LEGACY_FUNCTIONS);
3638 dmu_object_set_checksum(os, bigobj, cksum, tx);
3639
3640 enum zio_compress comp;
3641 do {
3642 comp = (enum zio_compress)
3643 ztest_random_dsl_prop(ZFS_PROP_COMPRESSION);
3644 } while (comp >= ZIO_COMPRESS_LEGACY_FUNCTIONS);
3645 dmu_object_set_compress(os, bigobj, comp, tx);
3646
3647 /*
3648 * For each index from n to n + s, verify that the existing bufwad
3649 * in packobj matches the bufwads at the head and tail of the
3650 * corresponding chunk in bigobj. Then update all three bufwads
3651 * with the new values we want to write out.
3652 */
3653 for (i = 0; i < s; i++) {
3654 /* LINTED */
3655 pack = (bufwad_t *)((char *)packbuf + i * sizeof (bufwad_t));
3656 /* LINTED */
3657 bigH = (bufwad_t *)((char *)bigbuf + i * chunksize);
3658 /* LINTED */
3659 bigT = (bufwad_t *)((char *)bigH + chunksize) - 1;
3660
3661 ASSERT((uintptr_t)bigH - (uintptr_t)bigbuf < bigsize);
3662 ASSERT((uintptr_t)bigT - (uintptr_t)bigbuf < bigsize);
3663
3664 if (pack->bw_txg > txg)
3665 fatal(0, "future leak: got %llx, open txg is %llx",
3666 pack->bw_txg, txg);
3667
3668 if (pack->bw_data != 0 && pack->bw_index != n + i)
3669 fatal(0, "wrong index: got %llx, wanted %llx+%llx",
3670 pack->bw_index, n, i);
3671
3672 if (bcmp(pack, bigH, sizeof (bufwad_t)) != 0)
3673 fatal(0, "pack/bigH mismatch in %p/%p", pack, bigH);
3674
3675 if (bcmp(pack, bigT, sizeof (bufwad_t)) != 0)
3676 fatal(0, "pack/bigT mismatch in %p/%p", pack, bigT);
3677
3678 if (freeit) {
3679 bzero(pack, sizeof (bufwad_t));
3680 } else {
3681 pack->bw_index = n + i;
3682 pack->bw_txg = txg;
3683 pack->bw_data = 1 + ztest_random(-2ULL);
3684 }
3685 *bigH = *pack;
3686 *bigT = *pack;
3687 }
3688
3689 /*
3690 * We've verified all the old bufwads, and made new ones.
3691 * Now write them out.
3692 */
3693 dmu_write(os, packobj, packoff, packsize, packbuf, tx);
3694
3695 if (freeit) {
3696 if (ztest_opts.zo_verbose >= 7) {
3697 (void) printf("freeing offset %llx size %llx"
3698 " txg %llx\n",
3699 (u_longlong_t)bigoff,
3700 (u_longlong_t)bigsize,
3701 (u_longlong_t)txg);
3702 }
3703 VERIFY(0 == dmu_free_range(os, bigobj, bigoff, bigsize, tx));
3704 } else {
3705 if (ztest_opts.zo_verbose >= 7) {
3706 (void) printf("writing offset %llx size %llx"
3707 " txg %llx\n",
3708 (u_longlong_t)bigoff,
3709 (u_longlong_t)bigsize,
3710 (u_longlong_t)txg);
3711 }
3712 dmu_write(os, bigobj, bigoff, bigsize, bigbuf, tx);
3713 }
3714
3715 dmu_tx_commit(tx);
3716
3717 /*
3718 * Sanity check the stuff we just wrote.
3719 */
3720 {
3721 void *packcheck = umem_alloc(packsize, UMEM_NOFAIL);
3722 void *bigcheck = umem_alloc(bigsize, UMEM_NOFAIL);
3723
3724 VERIFY(0 == dmu_read(os, packobj, packoff,
3725 packsize, packcheck, DMU_READ_PREFETCH));
3726 VERIFY(0 == dmu_read(os, bigobj, bigoff,
3727 bigsize, bigcheck, DMU_READ_PREFETCH));
3728
3729 ASSERT(bcmp(packbuf, packcheck, packsize) == 0);
3730 ASSERT(bcmp(bigbuf, bigcheck, bigsize) == 0);
3731
3732 umem_free(packcheck, packsize);
3733 umem_free(bigcheck, bigsize);
3734 }
3735
3736 umem_free(packbuf, packsize);
3737 umem_free(bigbuf, bigsize);
3738 }
3739
3740 void
3741 compare_and_update_pbbufs(uint64_t s, bufwad_t *packbuf, bufwad_t *bigbuf,
3742 uint64_t bigsize, uint64_t n, uint64_t chunksize, uint64_t txg)
3743 {
3744 uint64_t i;
3745 bufwad_t *pack;
3746 bufwad_t *bigH;
3747 bufwad_t *bigT;
3748
3749 /*
3750 * For each index from n to n + s, verify that the existing bufwad
3751 * in packobj matches the bufwads at the head and tail of the
3752 * corresponding chunk in bigobj. Then update all three bufwads
3753 * with the new values we want to write out.
3754 */
3755 for (i = 0; i < s; i++) {
3756 /* LINTED */
3757 pack = (bufwad_t *)((char *)packbuf + i * sizeof (bufwad_t));
3758 /* LINTED */
3759 bigH = (bufwad_t *)((char *)bigbuf + i * chunksize);
3760 /* LINTED */
3761 bigT = (bufwad_t *)((char *)bigH + chunksize) - 1;
3762
3763 ASSERT((uintptr_t)bigH - (uintptr_t)bigbuf < bigsize);
3764 ASSERT((uintptr_t)bigT - (uintptr_t)bigbuf < bigsize);
3765
3766 if (pack->bw_txg > txg)
3767 fatal(0, "future leak: got %llx, open txg is %llx",
3768 pack->bw_txg, txg);
3769
3770 if (pack->bw_data != 0 && pack->bw_index != n + i)
3771 fatal(0, "wrong index: got %llx, wanted %llx+%llx",
3772 pack->bw_index, n, i);
3773
3774 if (bcmp(pack, bigH, sizeof (bufwad_t)) != 0)
3775 fatal(0, "pack/bigH mismatch in %p/%p", pack, bigH);
3776
3777 if (bcmp(pack, bigT, sizeof (bufwad_t)) != 0)
3778 fatal(0, "pack/bigT mismatch in %p/%p", pack, bigT);
3779
3780 pack->bw_index = n + i;
3781 pack->bw_txg = txg;
3782 pack->bw_data = 1 + ztest_random(-2ULL);
3783
3784 *bigH = *pack;
3785 *bigT = *pack;
3786 }
3787 }
3788
3789 void
3790 ztest_dmu_read_write_zcopy(ztest_ds_t *zd, uint64_t id)
3791 {
3792 objset_t *os = zd->zd_os;
3793 ztest_od_t od[2];
3794 dmu_tx_t *tx;
3795 uint64_t i;
3796 int error;
3797 uint64_t n, s, txg;
3798 bufwad_t *packbuf, *bigbuf;
3799 uint64_t packobj, packoff, packsize, bigobj, bigoff, bigsize;
3800 uint64_t blocksize = ztest_random_blocksize();
3801 uint64_t chunksize = blocksize;
3802 uint64_t regions = 997;
3803 uint64_t stride = 123456789ULL;
3804 uint64_t width = 9;
3805 dmu_buf_t *bonus_db;
3806 arc_buf_t **bigbuf_arcbufs;
3807 dmu_object_info_t doi;
3808
3809 /*
3810 * This test uses two objects, packobj and bigobj, that are always
3811 * updated together (i.e. in the same tx) so that their contents are
3812 * in sync and can be compared. Their contents relate to each other
3813 * in a simple way: packobj is a dense array of 'bufwad' structures,
3814 * while bigobj is a sparse array of the same bufwads. Specifically,
3815 * for any index n, there are three bufwads that should be identical:
3816 *
3817 * packobj, at offset n * sizeof (bufwad_t)
3818 * bigobj, at the head of the nth chunk
3819 * bigobj, at the tail of the nth chunk
3820 *
3821 * The chunk size is set equal to bigobj block size so that
3822 * dmu_assign_arcbuf() can be tested for object updates.
3823 */
3824
3825 /*
3826 * Read the directory info. If it's the first time, set things up.
3827 */
3828 ztest_od_init(&od[0], id, FTAG, 0, DMU_OT_UINT64_OTHER, blocksize, 0);
3829 ztest_od_init(&od[1], id, FTAG, 1, DMU_OT_UINT64_OTHER, 0, chunksize);
3830
3831 if (ztest_object_init(zd, od, sizeof (od), B_FALSE) != 0)
3832 return;
3833
3834 bigobj = od[0].od_object;
3835 packobj = od[1].od_object;
3836 blocksize = od[0].od_blocksize;
3837 chunksize = blocksize;
3838 ASSERT(chunksize == od[1].od_gen);
3839
3840 VERIFY(dmu_object_info(os, bigobj, &doi) == 0);
3841 VERIFY(ISP2(doi.doi_data_block_size));
3842 VERIFY(chunksize == doi.doi_data_block_size);
3843 VERIFY(chunksize >= 2 * sizeof (bufwad_t));
3844
3845 /*
3846 * Pick a random index and compute the offsets into packobj and bigobj.
3847 */
3848 n = ztest_random(regions) * stride + ztest_random(width);
3849 s = 1 + ztest_random(width - 1);
3850
3851 packoff = n * sizeof (bufwad_t);
3852 packsize = s * sizeof (bufwad_t);
3853
3854 bigoff = n * chunksize;
3855 bigsize = s * chunksize;
3856
3857 packbuf = umem_zalloc(packsize, UMEM_NOFAIL);
3858 bigbuf = umem_zalloc(bigsize, UMEM_NOFAIL);
3859
3860 VERIFY3U(0, ==, dmu_bonus_hold(os, bigobj, FTAG, &bonus_db));
3861
3862 bigbuf_arcbufs = umem_zalloc(2 * s * sizeof (arc_buf_t *), UMEM_NOFAIL);
3863
3864 /*
3865 * Iteration 0 test zcopy for DB_UNCACHED dbufs.
3866 * Iteration 1 test zcopy to already referenced dbufs.
3867 * Iteration 2 test zcopy to dirty dbuf in the same txg.
3868 * Iteration 3 test zcopy to dbuf dirty in previous txg.
3869 * Iteration 4 test zcopy when dbuf is no longer dirty.
3870 * Iteration 5 test zcopy when it can't be done.
3871 * Iteration 6 one more zcopy write.
3872 */
3873 for (i = 0; i < 7; i++) {
3874 uint64_t j;
3875 uint64_t off;
3876
3877 /*
3878 * In iteration 5 (i == 5) use arcbufs
3879 * that don't match bigobj blksz to test
3880 * dmu_assign_arcbuf() when it can't directly
3881 * assign an arcbuf to a dbuf.
3882 */
3883 for (j = 0; j < s; j++) {
3884 if (i != 5) {
3885 bigbuf_arcbufs[j] =
3886 dmu_request_arcbuf(bonus_db, chunksize);
3887 } else {
3888 bigbuf_arcbufs[2 * j] =
3889 dmu_request_arcbuf(bonus_db, chunksize / 2);
3890 bigbuf_arcbufs[2 * j + 1] =
3891 dmu_request_arcbuf(bonus_db, chunksize / 2);
3892 }
3893 }
3894
3895 /*
3896 * Get a tx for the mods to both packobj and bigobj.
3897 */
3898 tx = dmu_tx_create(os);
3899
3900 dmu_tx_hold_write(tx, packobj, packoff, packsize);
3901 dmu_tx_hold_write(tx, bigobj, bigoff, bigsize);
3902
3903 txg = ztest_tx_assign(tx, TXG_MIGHTWAIT, FTAG);
3904 if (txg == 0) {
3905 umem_free(packbuf, packsize);
3906 umem_free(bigbuf, bigsize);
3907 for (j = 0; j < s; j++) {
3908 if (i != 5) {
3909 dmu_return_arcbuf(bigbuf_arcbufs[j]);
3910 } else {
3911 dmu_return_arcbuf(
3912 bigbuf_arcbufs[2 * j]);
3913 dmu_return_arcbuf(
3914 bigbuf_arcbufs[2 * j + 1]);
3915 }
3916 }
3917 umem_free(bigbuf_arcbufs, 2 * s * sizeof (arc_buf_t *));
3918 dmu_buf_rele(bonus_db, FTAG);
3919 return;
3920 }
3921
3922 /*
3923 * 50% of the time don't read objects in the 1st iteration to
3924 * test dmu_assign_arcbuf() for the case when there're no
3925 * existing dbufs for the specified offsets.
3926 */
3927 if (i != 0 || ztest_random(2) != 0) {
3928 error = dmu_read(os, packobj, packoff,
3929 packsize, packbuf, DMU_READ_PREFETCH);
3930 ASSERT0(error);
3931 error = dmu_read(os, bigobj, bigoff, bigsize,
3932 bigbuf, DMU_READ_PREFETCH);
3933 ASSERT0(error);
3934 }
3935 compare_and_update_pbbufs(s, packbuf, bigbuf, bigsize,
3936 n, chunksize, txg);
3937
3938 /*
3939 * We've verified all the old bufwads, and made new ones.
3940 * Now write them out.
3941 */
3942 dmu_write(os, packobj, packoff, packsize, packbuf, tx);
3943 if (ztest_opts.zo_verbose >= 7) {
3944 (void) printf("writing offset %llx size %llx"
3945 " txg %llx\n",
3946 (u_longlong_t)bigoff,
3947 (u_longlong_t)bigsize,
3948 (u_longlong_t)txg);
3949 }
3950 for (off = bigoff, j = 0; j < s; j++, off += chunksize) {
3951 dmu_buf_t *dbt;
3952 if (i != 5) {
3953 bcopy((caddr_t)bigbuf + (off - bigoff),
3954 bigbuf_arcbufs[j]->b_data, chunksize);
3955 } else {
3956 bcopy((caddr_t)bigbuf + (off - bigoff),
3957 bigbuf_arcbufs[2 * j]->b_data,
3958 chunksize / 2);
3959 bcopy((caddr_t)bigbuf + (off - bigoff) +
3960 chunksize / 2,
3961 bigbuf_arcbufs[2 * j + 1]->b_data,
3962 chunksize / 2);
3963 }
3964
3965 if (i == 1) {
3966 VERIFY(dmu_buf_hold(os, bigobj, off,
3967 FTAG, &dbt, DMU_READ_NO_PREFETCH) == 0);
3968 }
3969 if (i != 5) {
3970 dmu_assign_arcbuf(bonus_db, off,
3971 bigbuf_arcbufs[j], tx);
3972 } else {
3973 dmu_assign_arcbuf(bonus_db, off,
3974 bigbuf_arcbufs[2 * j], tx);
3975 dmu_assign_arcbuf(bonus_db,
3976 off + chunksize / 2,
3977 bigbuf_arcbufs[2 * j + 1], tx);
3978 }
3979 if (i == 1) {
3980 dmu_buf_rele(dbt, FTAG);
3981 }
3982 }
3983 dmu_tx_commit(tx);
3984
3985 /*
3986 * Sanity check the stuff we just wrote.
3987 */
3988 {
3989 void *packcheck = umem_alloc(packsize, UMEM_NOFAIL);
3990 void *bigcheck = umem_alloc(bigsize, UMEM_NOFAIL);
3991
3992 VERIFY(0 == dmu_read(os, packobj, packoff,
3993 packsize, packcheck, DMU_READ_PREFETCH));
3994 VERIFY(0 == dmu_read(os, bigobj, bigoff,
3995 bigsize, bigcheck, DMU_READ_PREFETCH));
3996
3997 ASSERT(bcmp(packbuf, packcheck, packsize) == 0);
3998 ASSERT(bcmp(bigbuf, bigcheck, bigsize) == 0);
3999
4000 umem_free(packcheck, packsize);
4001 umem_free(bigcheck, bigsize);
4002 }
4003 if (i == 2) {
4004 txg_wait_open(dmu_objset_pool(os), 0);
4005 } else if (i == 3) {
4006 txg_wait_synced(dmu_objset_pool(os), 0);
4007 }
4008 }
4009
4010 dmu_buf_rele(bonus_db, FTAG);
4011 umem_free(packbuf, packsize);
4012 umem_free(bigbuf, bigsize);
4013 umem_free(bigbuf_arcbufs, 2 * s * sizeof (arc_buf_t *));
4014 }
4015
4016 /* ARGSUSED */
4017 void
4018 ztest_dmu_write_parallel(ztest_ds_t *zd, uint64_t id)
4019 {
4020 ztest_od_t od[1];
4021 uint64_t offset = (1ULL << (ztest_random(20) + 43)) +
4022 (ztest_random(ZTEST_RANGE_LOCKS) << SPA_MAXBLOCKSHIFT);
4023
4024 /*
4025 * Have multiple threads write to large offsets in an object
4026 * to verify that parallel writes to an object -- even to the
4027 * same blocks within the object -- doesn't cause any trouble.
4028 */
4029 ztest_od_init(&od[0], ID_PARALLEL, FTAG, 0, DMU_OT_UINT64_OTHER, 0, 0);
4030
4031 if (ztest_object_init(zd, od, sizeof (od), B_FALSE) != 0)
4032 return;
4033
4034 while (ztest_random(10) != 0)
4035 ztest_io(zd, od[0].od_object, offset);
4036 }
4037
4038 void
4039 ztest_dmu_prealloc(ztest_ds_t *zd, uint64_t id)
4040 {
4041 ztest_od_t od[1];
4042 uint64_t offset = (1ULL << (ztest_random(4) + SPA_MAXBLOCKSHIFT)) +
4043 (ztest_random(ZTEST_RANGE_LOCKS) << SPA_MAXBLOCKSHIFT);
4044 uint64_t count = ztest_random(20) + 1;
4045 uint64_t blocksize = ztest_random_blocksize();
4046 void *data;
4047
4048 ztest_od_init(&od[0], id, FTAG, 0, DMU_OT_UINT64_OTHER, blocksize, 0);
4049
4050 if (ztest_object_init(zd, od, sizeof (od), !ztest_random(2)) != 0)
4051 return;
4052
4053 if (ztest_truncate(zd, od[0].od_object, offset, count * blocksize) != 0)
4054 return;
4055
4056 ztest_prealloc(zd, od[0].od_object, offset, count * blocksize);
4057
4058 data = umem_zalloc(blocksize, UMEM_NOFAIL);
4059
4060 while (ztest_random(count) != 0) {
4061 uint64_t randoff = offset + (ztest_random(count) * blocksize);
4062 if (ztest_write(zd, od[0].od_object, randoff, blocksize,
4063 data) != 0)
4064 break;
4065 while (ztest_random(4) != 0)
4066 ztest_io(zd, od[0].od_object, randoff);
4067 }
4068
4069 umem_free(data, blocksize);
4070 }
4071
4072 /*
4073 * Verify that zap_{create,destroy,add,remove,update} work as expected.
4074 */
4075 #define ZTEST_ZAP_MIN_INTS 1
4076 #define ZTEST_ZAP_MAX_INTS 4
4077 #define ZTEST_ZAP_MAX_PROPS 1000
4078
4079 void
4080 ztest_zap(ztest_ds_t *zd, uint64_t id)
4081 {
4082 objset_t *os = zd->zd_os;
4083 ztest_od_t od[1];
4084 uint64_t object;
4085 uint64_t txg, last_txg;
4086 uint64_t value[ZTEST_ZAP_MAX_INTS];
4087 uint64_t zl_ints, zl_intsize, prop;
4088 int i, ints;
4089 dmu_tx_t *tx;
4090 char propname[100], txgname[100];
4091 int error;
4092 char *hc[2] = { "s.acl.h", ".s.open.h.hyLZlg" };
4093
4094 ztest_od_init(&od[0], id, FTAG, 0, DMU_OT_ZAP_OTHER, 0, 0);
4095
4096 if (ztest_object_init(zd, od, sizeof (od), !ztest_random(2)) != 0)
4097 return;
4098
4099 object = od[0].od_object;
4100
4101 /*
4102 * Generate a known hash collision, and verify that
4103 * we can lookup and remove both entries.
4104 */
4105 tx = dmu_tx_create(os);
4106 dmu_tx_hold_zap(tx, object, B_TRUE, NULL);
4107 txg = ztest_tx_assign(tx, TXG_MIGHTWAIT, FTAG);
4108 if (txg == 0)
4109 return;
4110 for (i = 0; i < 2; i++) {
4111 value[i] = i;
4112 VERIFY3U(0, ==, zap_add(os, object, hc[i], sizeof (uint64_t),
4113 1, &value[i], tx));
4114 }
4115 for (i = 0; i < 2; i++) {
4116 VERIFY3U(EEXIST, ==, zap_add(os, object, hc[i],
4117 sizeof (uint64_t), 1, &value[i], tx));
4118 VERIFY3U(0, ==,
4119 zap_length(os, object, hc[i], &zl_intsize, &zl_ints));
4120 ASSERT3U(zl_intsize, ==, sizeof (uint64_t));
4121 ASSERT3U(zl_ints, ==, 1);
4122 }
4123 for (i = 0; i < 2; i++) {
4124 VERIFY3U(0, ==, zap_remove(os, object, hc[i], tx));
4125 }
4126 dmu_tx_commit(tx);
4127
4128 /*
4129 * Generate a buch of random entries.
4130 */
4131 ints = MAX(ZTEST_ZAP_MIN_INTS, object % ZTEST_ZAP_MAX_INTS);
4132
4133 prop = ztest_random(ZTEST_ZAP_MAX_PROPS);
4134 (void) sprintf(propname, "prop_%llu", (u_longlong_t)prop);
4135 (void) sprintf(txgname, "txg_%llu", (u_longlong_t)prop);
4136 bzero(value, sizeof (value));
4137 last_txg = 0;
4138
4139 /*
4140 * If these zap entries already exist, validate their contents.
4141 */
4142 error = zap_length(os, object, txgname, &zl_intsize, &zl_ints);
4143 if (error == 0) {
4144 ASSERT3U(zl_intsize, ==, sizeof (uint64_t));
4145 ASSERT3U(zl_ints, ==, 1);
4146
4147 VERIFY(zap_lookup(os, object, txgname, zl_intsize,
4148 zl_ints, &last_txg) == 0);
4149
4150 VERIFY(zap_length(os, object, propname, &zl_intsize,
4151 &zl_ints) == 0);
4152
4153 ASSERT3U(zl_intsize, ==, sizeof (uint64_t));
4154 ASSERT3U(zl_ints, ==, ints);
4155
4156 VERIFY(zap_lookup(os, object, propname, zl_intsize,
4157 zl_ints, value) == 0);
4158
4159 for (i = 0; i < ints; i++) {
4160 ASSERT3U(value[i], ==, last_txg + object + i);
4161 }
4162 } else {
4163 ASSERT3U(error, ==, ENOENT);
4164 }
4165
4166 /*
4167 * Atomically update two entries in our zap object.
4168 * The first is named txg_%llu, and contains the txg
4169 * in which the property was last updated. The second
4170 * is named prop_%llu, and the nth element of its value
4171 * should be txg + object + n.
4172 */
4173 tx = dmu_tx_create(os);
4174 dmu_tx_hold_zap(tx, object, B_TRUE, NULL);
4175 txg = ztest_tx_assign(tx, TXG_MIGHTWAIT, FTAG);
4176 if (txg == 0)
4177 return;
4178
4179 if (last_txg > txg)
4180 fatal(0, "zap future leak: old %llu new %llu", last_txg, txg);
4181
4182 for (i = 0; i < ints; i++)
4183 value[i] = txg + object + i;
4184
4185 VERIFY3U(0, ==, zap_update(os, object, txgname, sizeof (uint64_t),
4186 1, &txg, tx));
4187 VERIFY3U(0, ==, zap_update(os, object, propname, sizeof (uint64_t),
4188 ints, value, tx));
4189
4190 dmu_tx_commit(tx);
4191
4192 /*
4193 * Remove a random pair of entries.
4194 */
4195 prop = ztest_random(ZTEST_ZAP_MAX_PROPS);
4196 (void) sprintf(propname, "prop_%llu", (u_longlong_t)prop);
4197 (void) sprintf(txgname, "txg_%llu", (u_longlong_t)prop);
4198
4199 error = zap_length(os, object, txgname, &zl_intsize, &zl_ints);
4200
4201 if (error == ENOENT)
4202 return;
4203
4204 ASSERT0(error);
4205
4206 tx = dmu_tx_create(os);
4207 dmu_tx_hold_zap(tx, object, B_TRUE, NULL);
4208 txg = ztest_tx_assign(tx, TXG_MIGHTWAIT, FTAG);
4209 if (txg == 0)
4210 return;
4211 VERIFY3U(0, ==, zap_remove(os, object, txgname, tx));
4212 VERIFY3U(0, ==, zap_remove(os, object, propname, tx));
4213 dmu_tx_commit(tx);
4214 }
4215
4216 /*
4217 * Testcase to test the upgrading of a microzap to fatzap.
4218 */
4219 void
4220 ztest_fzap(ztest_ds_t *zd, uint64_t id)
4221 {
4222 objset_t *os = zd->zd_os;
4223 ztest_od_t od[1];
4224 uint64_t object, txg;
4225
4226 ztest_od_init(&od[0], id, FTAG, 0, DMU_OT_ZAP_OTHER, 0, 0);
4227
4228 if (ztest_object_init(zd, od, sizeof (od), !ztest_random(2)) != 0)
4229 return;
4230
4231 object = od[0].od_object;
4232
4233 /*
4234 * Add entries to this ZAP and make sure it spills over
4235 * and gets upgraded to a fatzap. Also, since we are adding
4236 * 2050 entries we should see ptrtbl growth and leaf-block split.
4237 */
4238 for (int i = 0; i < 2050; i++) {
4239 char name[MAXNAMELEN];
4240 uint64_t value = i;
4241 dmu_tx_t *tx;
4242 int error;
4243
4244 (void) snprintf(name, sizeof (name), "fzap-%llu-%llu",
4245 id, value);
4246
4247 tx = dmu_tx_create(os);
4248 dmu_tx_hold_zap(tx, object, B_TRUE, name);
4249 txg = ztest_tx_assign(tx, TXG_MIGHTWAIT, FTAG);
4250 if (txg == 0)
4251 return;
4252 error = zap_add(os, object, name, sizeof (uint64_t), 1,
4253 &value, tx);
4254 ASSERT(error == 0 || error == EEXIST);
4255 dmu_tx_commit(tx);
4256 }
4257 }
4258
4259 /* ARGSUSED */
4260 void
4261 ztest_zap_parallel(ztest_ds_t *zd, uint64_t id)
4262 {
4263 objset_t *os = zd->zd_os;
4264 ztest_od_t od[1];
4265 uint64_t txg, object, count, wsize, wc, zl_wsize, zl_wc;
4266 dmu_tx_t *tx;
4267 int i, namelen, error;
4268 int micro = ztest_random(2);
4269 char name[20], string_value[20];
4270 void *data;
4271
4272 ztest_od_init(&od[0], ID_PARALLEL, FTAG, micro, DMU_OT_ZAP_OTHER, 0, 0);
4273
4274 if (ztest_object_init(zd, od, sizeof (od), B_FALSE) != 0)
4275 return;
4276
4277 object = od[0].od_object;
4278
4279 /*
4280 * Generate a random name of the form 'xxx.....' where each
4281 * x is a random printable character and the dots are dots.
4282 * There are 94 such characters, and the name length goes from
4283 * 6 to 20, so there are 94^3 * 15 = 12,458,760 possible names.
4284 */
4285 namelen = ztest_random(sizeof (name) - 5) + 5 + 1;
4286
4287 for (i = 0; i < 3; i++)
4288 name[i] = '!' + ztest_random('~' - '!' + 1);
4289 for (; i < namelen - 1; i++)
4290 name[i] = '.';
4291 name[i] = '\0';
4292
4293 if ((namelen & 1) || micro) {
4294 wsize = sizeof (txg);
4295 wc = 1;
4296 data = &txg;
4297 } else {
4298 wsize = 1;
4299 wc = namelen;
4300 data = string_value;
4301 }
4302
4303 count = -1ULL;
4304 VERIFY0(zap_count(os, object, &count));
4305 ASSERT(count != -1ULL);
4306
4307 /*
4308 * Select an operation: length, lookup, add, update, remove.
4309 */
4310 i = ztest_random(5);
4311
4312 if (i >= 2) {
4313 tx = dmu_tx_create(os);
4314 dmu_tx_hold_zap(tx, object, B_TRUE, NULL);
4315 txg = ztest_tx_assign(tx, TXG_MIGHTWAIT, FTAG);
4316 if (txg == 0)
4317 return;
4318 bcopy(name, string_value, namelen);
4319 } else {
4320 tx = NULL;
4321 txg = 0;
4322 bzero(string_value, namelen);
4323 }
4324
4325 switch (i) {
4326
4327 case 0:
4328 error = zap_length(os, object, name, &zl_wsize, &zl_wc);
4329 if (error == 0) {
4330 ASSERT3U(wsize, ==, zl_wsize);
4331 ASSERT3U(wc, ==, zl_wc);
4332 } else {
4333 ASSERT3U(error, ==, ENOENT);
4334 }
4335 break;
4336
4337 case 1:
4338 error = zap_lookup(os, object, name, wsize, wc, data);
4339 if (error == 0) {
4340 if (data == string_value &&
4341 bcmp(name, data, namelen) != 0)
4342 fatal(0, "name '%s' != val '%s' len %d",
4343 name, data, namelen);
4344 } else {
4345 ASSERT3U(error, ==, ENOENT);
4346 }
4347 break;
4348
4349 case 2:
4350 error = zap_add(os, object, name, wsize, wc, data, tx);
4351 ASSERT(error == 0 || error == EEXIST);
4352 break;
4353
4354 case 3:
4355 VERIFY(zap_update(os, object, name, wsize, wc, data, tx) == 0);
4356 break;
4357
4358 case 4:
4359 error = zap_remove(os, object, name, tx);
4360 ASSERT(error == 0 || error == ENOENT);
4361 break;
4362 }
4363
4364 if (tx != NULL)
4365 dmu_tx_commit(tx);
4366 }
4367
4368 /*
4369 * Commit callback data.
4370 */
4371 typedef struct ztest_cb_data {
4372 list_node_t zcd_node;
4373 uint64_t zcd_txg;
4374 int zcd_expected_err;
4375 boolean_t zcd_added;
4376 boolean_t zcd_called;
4377 spa_t *zcd_spa;
4378 } ztest_cb_data_t;
4379
4380 /* This is the actual commit callback function */
4381 static void
4382 ztest_commit_callback(void *arg, int error)
4383 {
4384 ztest_cb_data_t *data = arg;
4385 uint64_t synced_txg;
4386
4387 VERIFY(data != NULL);
4388 VERIFY3S(data->zcd_expected_err, ==, error);
4389 VERIFY(!data->zcd_called);
4390
4391 synced_txg = spa_last_synced_txg(data->zcd_spa);
4392 if (data->zcd_txg > synced_txg)
4393 fatal(0, "commit callback of txg %" PRIu64 " called prematurely"
4394 ", last synced txg = %" PRIu64 "\n", data->zcd_txg,
4395 synced_txg);
4396
4397 data->zcd_called = B_TRUE;
4398
4399 if (error == ECANCELED) {
4400 ASSERT0(data->zcd_txg);
4401 ASSERT(!data->zcd_added);
4402
4403 /*
4404 * The private callback data should be destroyed here, but
4405 * since we are going to check the zcd_called field after
4406 * dmu_tx_abort(), we will destroy it there.
4407 */
4408 return;
4409 }
4410
4411 /* Was this callback added to the global callback list? */
4412 if (!data->zcd_added)
4413 goto out;
4414
4415 ASSERT3U(data->zcd_txg, !=, 0);
4416
4417 /* Remove our callback from the list */
4418 (void) mutex_lock(&zcl.zcl_callbacks_lock);
4419 list_remove(&zcl.zcl_callbacks, data);
4420 (void) mutex_unlock(&zcl.zcl_callbacks_lock);
4421
4422 out:
4423 umem_free(data, sizeof (ztest_cb_data_t));
4424 }
4425
4426 /* Allocate and initialize callback data structure */
4427 static ztest_cb_data_t *
4428 ztest_create_cb_data(objset_t *os, uint64_t txg)
4429 {
4430 ztest_cb_data_t *cb_data;
4431
4432 cb_data = umem_zalloc(sizeof (ztest_cb_data_t), UMEM_NOFAIL);
4433
4434 cb_data->zcd_txg = txg;
4435 cb_data->zcd_spa = dmu_objset_spa(os);
4436
4437 return (cb_data);
4438 }
4439
4440 /*
4441 * If a number of txgs equal to this threshold have been created after a commit
4442 * callback has been registered but not called, then we assume there is an
4443 * implementation bug.
4444 */
4445 #define ZTEST_COMMIT_CALLBACK_THRESH (TXG_CONCURRENT_STATES + 2)
4446
4447 /*
4448 * Commit callback test.
4449 */
4450 void
4451 ztest_dmu_commit_callbacks(ztest_ds_t *zd, uint64_t id)
4452 {
4453 objset_t *os = zd->zd_os;
4454 ztest_od_t od[1];
4455 dmu_tx_t *tx;
4456 ztest_cb_data_t *cb_data[3], *tmp_cb;
4457 uint64_t old_txg, txg;
4458 int i, error;
4459
4460 ztest_od_init(&od[0], id, FTAG, 0, DMU_OT_UINT64_OTHER, 0, 0);
4461
4462 if (ztest_object_init(zd, od, sizeof (od), B_FALSE) != 0)
4463 return;
4464
4465 tx = dmu_tx_create(os);
4466
4467 cb_data[0] = ztest_create_cb_data(os, 0);
4468 dmu_tx_callback_register(tx, ztest_commit_callback, cb_data[0]);
4469
4470 dmu_tx_hold_write(tx, od[0].od_object, 0, sizeof (uint64_t));
4471
4472 /* Every once in a while, abort the transaction on purpose */
4473 if (ztest_random(100) == 0)
4474 error = -1;
4475
4476 if (!error)
4477 error = dmu_tx_assign(tx, TXG_NOWAIT);
4478
4479 txg = error ? 0 : dmu_tx_get_txg(tx);
4480
4481 cb_data[0]->zcd_txg = txg;
4482 cb_data[1] = ztest_create_cb_data(os, txg);
4483 dmu_tx_callback_register(tx, ztest_commit_callback, cb_data[1]);
4484
4485 if (error) {
4486 /*
4487 * It's not a strict requirement to call the registered
4488 * callbacks from inside dmu_tx_abort(), but that's what
4489 * it's supposed to happen in the current implementation
4490 * so we will check for that.
4491 */
4492 for (i = 0; i < 2; i++) {
4493 cb_data[i]->zcd_expected_err = ECANCELED;
4494 VERIFY(!cb_data[i]->zcd_called);
4495 }
4496
4497 dmu_tx_abort(tx);
4498
4499 for (i = 0; i < 2; i++) {
4500 VERIFY(cb_data[i]->zcd_called);
4501 umem_free(cb_data[i], sizeof (ztest_cb_data_t));
4502 }
4503
4504 return;
4505 }
4506
4507 cb_data[2] = ztest_create_cb_data(os, txg);
4508 dmu_tx_callback_register(tx, ztest_commit_callback, cb_data[2]);
4509
4510 /*
4511 * Read existing data to make sure there isn't a future leak.
4512 */
4513 VERIFY(0 == dmu_read(os, od[0].od_object, 0, sizeof (uint64_t),
4514 &old_txg, DMU_READ_PREFETCH));
4515
4516 if (old_txg > txg)
4517 fatal(0, "future leak: got %" PRIu64 ", open txg is %" PRIu64,
4518 old_txg, txg);
4519
4520 dmu_write(os, od[0].od_object, 0, sizeof (uint64_t), &txg, tx);
4521
4522 (void) mutex_lock(&zcl.zcl_callbacks_lock);
4523
4524 /*
4525 * Since commit callbacks don't have any ordering requirement and since
4526 * it is theoretically possible for a commit callback to be called
4527 * after an arbitrary amount of time has elapsed since its txg has been
4528 * synced, it is difficult to reliably determine whether a commit
4529 * callback hasn't been called due to high load or due to a flawed
4530 * implementation.
4531 *
4532 * In practice, we will assume that if after a certain number of txgs a
4533 * commit callback hasn't been called, then most likely there's an
4534 * implementation bug..
4535 */
4536 tmp_cb = list_head(&zcl.zcl_callbacks);
4537 if (tmp_cb != NULL &&
4538 (txg - ZTEST_COMMIT_CALLBACK_THRESH) > tmp_cb->zcd_txg) {
4539 fatal(0, "Commit callback threshold exceeded, oldest txg: %"
4540 PRIu64 ", open txg: %" PRIu64 "\n", tmp_cb->zcd_txg, txg);
4541 }
4542
4543 /*
4544 * Let's find the place to insert our callbacks.
4545 *
4546 * Even though the list is ordered by txg, it is possible for the
4547 * insertion point to not be the end because our txg may already be
4548 * quiescing at this point and other callbacks in the open txg
4549 * (from other objsets) may have sneaked in.
4550 */
4551 tmp_cb = list_tail(&zcl.zcl_callbacks);
4552 while (tmp_cb != NULL && tmp_cb->zcd_txg > txg)
4553 tmp_cb = list_prev(&zcl.zcl_callbacks, tmp_cb);
4554
4555 /* Add the 3 callbacks to the list */
4556 for (i = 0; i < 3; i++) {
4557 if (tmp_cb == NULL)
4558 list_insert_head(&zcl.zcl_callbacks, cb_data[i]);
4559 else
4560 list_insert_after(&zcl.zcl_callbacks, tmp_cb,
4561 cb_data[i]);
4562
4563 cb_data[i]->zcd_added = B_TRUE;
4564 VERIFY(!cb_data[i]->zcd_called);
4565
4566 tmp_cb = cb_data[i];
4567 }
4568
4569 (void) mutex_unlock(&zcl.zcl_callbacks_lock);
4570
4571 dmu_tx_commit(tx);
4572 }
4573
4574 /* ARGSUSED */
4575 void
4576 ztest_dsl_prop_get_set(ztest_ds_t *zd, uint64_t id)
4577 {
4578 zfs_prop_t proplist[] = {
4579 ZFS_PROP_CHECKSUM,
4580 ZFS_PROP_COMPRESSION,
4581 ZFS_PROP_COPIES,
4582 ZFS_PROP_DEDUP
4583 };
4584
4585 (void) rw_rdlock(&ztest_name_lock);
4586
4587 for (int p = 0; p < sizeof (proplist) / sizeof (proplist[0]); p++)
4588 (void) ztest_dsl_prop_set_uint64(zd->zd_name, proplist[p],
4589 ztest_random_dsl_prop(proplist[p]), (int)ztest_random(2));
4590
4591 (void) rw_unlock(&ztest_name_lock);
4592 }
4593
4594 /* ARGSUSED */
4595 void
4596 ztest_spa_prop_get_set(ztest_ds_t *zd, uint64_t id)
4597 {
4598 nvlist_t *props = NULL;
4599
4600 (void) rw_rdlock(&ztest_name_lock);
4601
4602 (void) ztest_spa_prop_set_uint64(ZPOOL_PROP_DEDUPDITTO,
4603 ZIO_DEDUPDITTO_MIN + ztest_random(ZIO_DEDUPDITTO_MIN));
4604
4605 VERIFY0(spa_prop_get(ztest_spa, &props));
4606
4607 if (ztest_opts.zo_verbose >= 6)
4608 dump_nvlist(props, 4);
4609
4610 nvlist_free(props);
4611
4612 (void) rw_unlock(&ztest_name_lock);
4613 }
4614
4615 static int
4616 user_release_one(const char *snapname, const char *holdname)
4617 {
4618 nvlist_t *snaps, *holds;
4619 int error;
4620
4621 snaps = fnvlist_alloc();
4622 holds = fnvlist_alloc();
4623 fnvlist_add_boolean(holds, holdname);
4624 fnvlist_add_nvlist(snaps, snapname, holds);
4625 fnvlist_free(holds);
4626 error = dsl_dataset_user_release(snaps, NULL);
4627 fnvlist_free(snaps);
4628 return (error);
4629 }
4630
4631 /*
4632 * Test snapshot hold/release and deferred destroy.
4633 */
4634 void
4635 ztest_dmu_snapshot_hold(ztest_ds_t *zd, uint64_t id)
4636 {
4637 int error;
4638 objset_t *os = zd->zd_os;
4639 objset_t *origin;
4640 char snapname[100];
4641 char fullname[100];
4642 char clonename[100];
4643 char tag[100];
4644 char osname[MAXNAMELEN];
4645 nvlist_t *holds;
4646
4647 (void) rw_rdlock(&ztest_name_lock);
4648
4649 dmu_objset_name(os, osname);
4650
4651 (void) snprintf(snapname, sizeof (snapname), "sh1_%llu", id);
4652 (void) snprintf(fullname, sizeof (fullname), "%s@%s", osname, snapname);
4653 (void) snprintf(clonename, sizeof (clonename),
4654 "%s/ch1_%llu", osname, id);
4655 (void) snprintf(tag, sizeof (tag), "tag_%llu", id);
4656
4657 /*
4658 * Clean up from any previous run.
4659 */
4660 error = dsl_destroy_head(clonename);
4661 if (error != ENOENT)
4662 ASSERT0(error);
4663 error = user_release_one(fullname, tag);
4664 if (error != ESRCH && error != ENOENT)
4665 ASSERT0(error);
4666 error = dsl_destroy_snapshot(fullname, B_FALSE);
4667 if (error != ENOENT)
4668 ASSERT0(error);
4669
4670 /*
4671 * Create snapshot, clone it, mark snap for deferred destroy,
4672 * destroy clone, verify snap was also destroyed.
4673 */
4674 error = dmu_objset_snapshot_one(osname, snapname);
4675 if (error) {
4676 if (error == ENOSPC) {
4677 ztest_record_enospc("dmu_objset_snapshot");
4678 goto out;
4679 }
4680 fatal(0, "dmu_objset_snapshot(%s) = %d", fullname, error);
4681 }
4682
4683 error = dmu_objset_clone(clonename, fullname);
4684 if (error) {
4685 if (error == ENOSPC) {
4686 ztest_record_enospc("dmu_objset_clone");
4687 goto out;
4688 }
4689 fatal(0, "dmu_objset_clone(%s) = %d", clonename, error);
4690 }
4691
4692 error = dsl_destroy_snapshot(fullname, B_TRUE);
4693 if (error) {
4694 fatal(0, "dsl_destroy_snapshot(%s, B_TRUE) = %d",
4695 fullname, error);
4696 }
4697
4698 error = dsl_destroy_head(clonename);
4699 if (error)
4700 fatal(0, "dsl_destroy_head(%s) = %d", clonename, error);
4701
4702 error = dmu_objset_hold(fullname, FTAG, &origin);
4703 if (error != ENOENT)
4704 fatal(0, "dmu_objset_hold(%s) = %d", fullname, error);
4705
4706 /*
4707 * Create snapshot, add temporary hold, verify that we can't
4708 * destroy a held snapshot, mark for deferred destroy,
4709 * release hold, verify snapshot was destroyed.
4710 */
4711 error = dmu_objset_snapshot_one(osname, snapname);
4712 if (error) {
4713 if (error == ENOSPC) {
4714 ztest_record_enospc("dmu_objset_snapshot");
4715 goto out;
4716 }
4717 fatal(0, "dmu_objset_snapshot(%s) = %d", fullname, error);
4718 }
4719
4720 holds = fnvlist_alloc();
4721 fnvlist_add_string(holds, fullname, tag);
4722 error = dsl_dataset_user_hold(holds, 0, NULL);
4723 fnvlist_free(holds);
4724
4725 if (error == ENOSPC) {
4726 ztest_record_enospc("dsl_dataset_user_hold");
4727 goto out;
4728 } else if (error) {
4729 fatal(0, "dsl_dataset_user_hold(%s, %s) = %u",
4730 fullname, tag, error);
4731 }
4732
4733 error = dsl_destroy_snapshot(fullname, B_FALSE);
4734 if (error != EBUSY) {
4735 fatal(0, "dsl_destroy_snapshot(%s, B_FALSE) = %d",
4736 fullname, error);
4737 }
4738
4739 error = dsl_destroy_snapshot(fullname, B_TRUE);
4740 if (error) {
4741 fatal(0, "dsl_destroy_snapshot(%s, B_TRUE) = %d",
4742 fullname, error);
4743 }
4744
4745 error = user_release_one(fullname, tag);
4746 if (error)
4747 fatal(0, "user_release_one(%s, %s) = %d", fullname, tag, error);
4748
4749 VERIFY3U(dmu_objset_hold(fullname, FTAG, &origin), ==, ENOENT);
4750
4751 out:
4752 (void) rw_unlock(&ztest_name_lock);
4753 }
4754
4755 /*
4756 * Inject random faults into the on-disk data.
4757 */
4758 /* ARGSUSED */
4759 void
4760 ztest_fault_inject(ztest_ds_t *zd, uint64_t id)
4761 {
4762 ztest_shared_t *zs = ztest_shared;
4763 spa_t *spa = ztest_spa;
4764 int fd;
4765 uint64_t offset;
4766 uint64_t leaves;
4767 uint64_t bad = 0x1990c0ffeedecade;
4768 uint64_t top, leaf;
4769 char path0[MAXPATHLEN];
4770 char pathrand[MAXPATHLEN];
4771 size_t fsize;
4772 int bshift = SPA_MAXBLOCKSHIFT + 2; /* don't scrog all labels */
4773 int iters = 1000;
4774 int maxfaults;
4775 int mirror_save;
4776 vdev_t *vd0 = NULL;
4777 uint64_t guid0 = 0;
4778 boolean_t islog = B_FALSE;
4779
4780 VERIFY(mutex_lock(&ztest_vdev_lock) == 0);
4781 maxfaults = MAXFAULTS();
4782 leaves = MAX(zs->zs_mirrors, 1) * ztest_opts.zo_raidz;
4783 mirror_save = zs->zs_mirrors;
4784 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
4785
4786 ASSERT(leaves >= 1);
4787
4788 /*
4789 * Grab the name lock as reader. There are some operations
4790 * which don't like to have their vdevs changed while
4791 * they are in progress (i.e. spa_change_guid). Those
4792 * operations will have grabbed the name lock as writer.
4793 */
4794 (void) rw_rdlock(&ztest_name_lock);
4795
4796 /*
4797 * We need SCL_STATE here because we're going to look at vd0->vdev_tsd.
4798 */
4799 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
4800
4801 if (ztest_random(2) == 0) {
4802 /*
4803 * Inject errors on a normal data device or slog device.
4804 */
4805 top = ztest_random_vdev_top(spa, B_TRUE);
4806 leaf = ztest_random(leaves) + zs->zs_splits;
4807
4808 /*
4809 * Generate paths to the first leaf in this top-level vdev,
4810 * and to the random leaf we selected. We'll induce transient
4811 * write failures and random online/offline activity on leaf 0,
4812 * and we'll write random garbage to the randomly chosen leaf.
4813 */
4814 (void) snprintf(path0, sizeof (path0), ztest_dev_template,
4815 ztest_opts.zo_dir, ztest_opts.zo_pool,
4816 top * leaves + zs->zs_splits);
4817 (void) snprintf(pathrand, sizeof (pathrand), ztest_dev_template,
4818 ztest_opts.zo_dir, ztest_opts.zo_pool,
4819 top * leaves + leaf);
4820
4821 vd0 = vdev_lookup_by_path(spa->spa_root_vdev, path0);
4822 if (vd0 != NULL && vd0->vdev_top->vdev_islog)
4823 islog = B_TRUE;
4824
4825 /*
4826 * If the top-level vdev needs to be resilvered
4827 * then we only allow faults on the device that is
4828 * resilvering.
4829 */
4830 if (vd0 != NULL && maxfaults != 1 &&
4831 (!vdev_resilver_needed(vd0->vdev_top, NULL, NULL) ||
4832 vd0->vdev_resilver_txg != 0)) {
4833 /*
4834 * Make vd0 explicitly claim to be unreadable,
4835 * or unwriteable, or reach behind its back
4836 * and close the underlying fd. We can do this if
4837 * maxfaults == 0 because we'll fail and reexecute,
4838 * and we can do it if maxfaults >= 2 because we'll
4839 * have enough redundancy. If maxfaults == 1, the
4840 * combination of this with injection of random data
4841 * corruption below exceeds the pool's fault tolerance.
4842 */
4843 vdev_file_t *vf = vd0->vdev_tsd;
4844
4845 if (vf != NULL && ztest_random(3) == 0) {
4846 (void) close(vf->vf_vnode->v_fd);
4847 vf->vf_vnode->v_fd = -1;
4848 } else if (ztest_random(2) == 0) {
4849 vd0->vdev_cant_read = B_TRUE;
4850 } else {
4851 vd0->vdev_cant_write = B_TRUE;
4852 }
4853 guid0 = vd0->vdev_guid;
4854 }
4855 } else {
4856 /*
4857 * Inject errors on an l2cache device.
4858 */
4859 spa_aux_vdev_t *sav = &spa->spa_l2cache;
4860
4861 if (sav->sav_count == 0) {
4862 spa_config_exit(spa, SCL_STATE, FTAG);
4863 (void) rw_unlock(&ztest_name_lock);
4864 return;
4865 }
4866 vd0 = sav->sav_vdevs[ztest_random(sav->sav_count)];
4867 guid0 = vd0->vdev_guid;
4868 (void) strcpy(path0, vd0->vdev_path);
4869 (void) strcpy(pathrand, vd0->vdev_path);
4870
4871 leaf = 0;
4872 leaves = 1;
4873 maxfaults = INT_MAX; /* no limit on cache devices */
4874 }
4875
4876 spa_config_exit(spa, SCL_STATE, FTAG);
4877 (void) rw_unlock(&ztest_name_lock);
4878
4879 /*
4880 * If we can tolerate two or more faults, or we're dealing
4881 * with a slog, randomly online/offline vd0.
4882 */
4883 if ((maxfaults >= 2 || islog) && guid0 != 0) {
4884 if (ztest_random(10) < 6) {
4885 int flags = (ztest_random(2) == 0 ?
4886 ZFS_OFFLINE_TEMPORARY : 0);
4887
4888 /*
4889 * We have to grab the zs_name_lock as writer to
4890 * prevent a race between offlining a slog and
4891 * destroying a dataset. Offlining the slog will
4892 * grab a reference on the dataset which may cause
4893 * dmu_objset_destroy() to fail with EBUSY thus
4894 * leaving the dataset in an inconsistent state.
4895 */
4896 if (islog)
4897 (void) rw_wrlock(&ztest_name_lock);
4898
4899 VERIFY(vdev_offline(spa, guid0, flags) != EBUSY);
4900
4901 if (islog)
4902 (void) rw_unlock(&ztest_name_lock);
4903 } else {
4904 /*
4905 * Ideally we would like to be able to randomly
4906 * call vdev_[on|off]line without holding locks
4907 * to force unpredictable failures but the side
4908 * effects of vdev_[on|off]line prevent us from
4909 * doing so. We grab the ztest_vdev_lock here to
4910 * prevent a race between injection testing and
4911 * aux_vdev removal.
4912 */
4913 VERIFY(mutex_lock(&ztest_vdev_lock) == 0);
4914 (void) vdev_online(spa, guid0, 0, NULL);
4915 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
4916 }
4917 }
4918
4919 if (maxfaults == 0)
4920 return;
4921
4922 /*
4923 * We have at least single-fault tolerance, so inject data corruption.
4924 */
4925 fd = open(pathrand, O_RDWR);
4926
4927 if (fd == -1) /* we hit a gap in the device namespace */
4928 return;
4929
4930 fsize = lseek(fd, 0, SEEK_END);
4931
4932 while (--iters != 0) {
4933 offset = ztest_random(fsize / (leaves << bshift)) *
4934 (leaves << bshift) + (leaf << bshift) +
4935 (ztest_random(1ULL << (bshift - 1)) & -8ULL);
4936
4937 if (offset >= fsize)
4938 continue;
4939
4940 VERIFY(mutex_lock(&ztest_vdev_lock) == 0);
4941 if (mirror_save != zs->zs_mirrors) {
4942 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
4943 (void) close(fd);
4944 return;
4945 }
4946
4947 if (pwrite(fd, &bad, sizeof (bad), offset) != sizeof (bad))
4948 fatal(1, "can't inject bad word at 0x%llx in %s",
4949 offset, pathrand);
4950
4951 VERIFY(mutex_unlock(&ztest_vdev_lock) == 0);
4952
4953 if (ztest_opts.zo_verbose >= 7)
4954 (void) printf("injected bad word into %s,"
4955 " offset 0x%llx\n", pathrand, (u_longlong_t)offset);
4956 }
4957
4958 (void) close(fd);
4959 }
4960
4961 /*
4962 * Verify that DDT repair works as expected.
4963 */
4964 void
4965 ztest_ddt_repair(ztest_ds_t *zd, uint64_t id)
4966 {
4967 ztest_shared_t *zs = ztest_shared;
4968 spa_t *spa = ztest_spa;
4969 objset_t *os = zd->zd_os;
4970 ztest_od_t od[1];
4971 uint64_t object, blocksize, txg, pattern, psize;
4972 enum zio_checksum checksum = spa_dedup_checksum(spa);
4973 dmu_buf_t *db;
4974 dmu_tx_t *tx;
4975 void *buf;
4976 blkptr_t blk;
4977 int copies = 2 * ZIO_DEDUPDITTO_MIN;
4978
4979 blocksize = ztest_random_blocksize();
4980 blocksize = MIN(blocksize, 2048); /* because we write so many */
4981
4982 ztest_od_init(&od[0], id, FTAG, 0, DMU_OT_UINT64_OTHER, blocksize, 0);
4983
4984 if (ztest_object_init(zd, od, sizeof (od), B_FALSE) != 0)
4985 return;
4986
4987 /*
4988 * Take the name lock as writer to prevent anyone else from changing
4989 * the pool and dataset properies we need to maintain during this test.
4990 */
4991 (void) rw_wrlock(&ztest_name_lock);
4992
4993 if (ztest_dsl_prop_set_uint64(zd->zd_name, ZFS_PROP_DEDUP, checksum,
4994 B_FALSE) != 0 ||
4995 ztest_dsl_prop_set_uint64(zd->zd_name, ZFS_PROP_COPIES, 1,
4996 B_FALSE) != 0) {
4997 (void) rw_unlock(&ztest_name_lock);
4998 return;
4999 }
5000
5001 object = od[0].od_object;
5002 blocksize = od[0].od_blocksize;
5003 pattern = zs->zs_guid ^ dmu_objset_fsid_guid(os);
5004
5005 ASSERT(object != 0);
5006
5007 tx = dmu_tx_create(os);
5008 dmu_tx_hold_write(tx, object, 0, copies * blocksize);
5009 txg = ztest_tx_assign(tx, TXG_WAIT, FTAG);
5010 if (txg == 0) {
5011 (void) rw_unlock(&ztest_name_lock);
5012 return;
5013 }
5014
5015 /*
5016 * Write all the copies of our block.
5017 */
5018 for (int i = 0; i < copies; i++) {
5019 uint64_t offset = i * blocksize;
5020 int error = dmu_buf_hold(os, object, offset, FTAG, &db,
5021 DMU_READ_NO_PREFETCH);
5022 if (error != 0) {
5023 fatal(B_FALSE, "dmu_buf_hold(%p, %llu, %llu) = %u",
5024 os, (long long)object, (long long) offset, error);
5025 }
5026 ASSERT(db->db_offset == offset);
5027 ASSERT(db->db_size == blocksize);
5028 ASSERT(ztest_pattern_match(db->db_data, db->db_size, pattern) ||
5029 ztest_pattern_match(db->db_data, db->db_size, 0ULL));
5030 dmu_buf_will_fill(db, tx);
5031 ztest_pattern_set(db->db_data, db->db_size, pattern);
5032 dmu_buf_rele(db, FTAG);
5033 }
5034
5035 dmu_tx_commit(tx);
5036 txg_wait_synced(spa_get_dsl(spa), txg);
5037
5038 /*
5039 * Find out what block we got.
5040 */
5041 VERIFY0(dmu_buf_hold(os, object, 0, FTAG, &db,
5042 DMU_READ_NO_PREFETCH));
5043 blk = *((dmu_buf_impl_t *)db)->db_blkptr;
5044 dmu_buf_rele(db, FTAG);
5045
5046 /*
5047 * Damage the block. Dedup-ditto will save us when we read it later.
5048 */
5049 psize = BP_GET_PSIZE(&blk);
5050 buf = zio_buf_alloc(psize);
5051 ztest_pattern_set(buf, psize, ~pattern);
5052
5053 (void) zio_wait(zio_rewrite(NULL, spa, 0, &blk,
5054 buf, psize, NULL, NULL, ZIO_PRIORITY_SYNC_WRITE,
5055 ZIO_FLAG_CANFAIL | ZIO_FLAG_INDUCE_DAMAGE, NULL));
5056
5057 zio_buf_free(buf, psize);
5058
5059 (void) rw_unlock(&ztest_name_lock);
5060 }
5061
5062 /*
5063 * Scrub the pool.
5064 */
5065 /* ARGSUSED */
5066 void
5067 ztest_scrub(ztest_ds_t *zd, uint64_t id)
5068 {
5069 spa_t *spa = ztest_spa;
5070
5071 (void) spa_scan(spa, POOL_SCAN_SCRUB);
5072 (void) poll(NULL, 0, 100); /* wait a moment, then force a restart */
5073 (void) spa_scan(spa, POOL_SCAN_SCRUB);
5074 }
5075
5076 /*
5077 * Change the guid for the pool.
5078 */
5079 /* ARGSUSED */
5080 void
5081 ztest_reguid(ztest_ds_t *zd, uint64_t id)
5082 {
5083 spa_t *spa = ztest_spa;
5084 uint64_t orig, load;
5085 int error;
5086
5087 orig = spa_guid(spa);
5088 load = spa_load_guid(spa);
5089
5090 (void) rw_wrlock(&ztest_name_lock);
5091 error = spa_change_guid(spa);
5092 (void) rw_unlock(&ztest_name_lock);
5093
5094 if (error != 0)
5095 return;
5096
5097 if (ztest_opts.zo_verbose >= 4) {
5098 (void) printf("Changed guid old %llu -> %llu\n",
5099 (u_longlong_t)orig, (u_longlong_t)spa_guid(spa));
5100 }
5101
5102 VERIFY3U(orig, !=, spa_guid(spa));
5103 VERIFY3U(load, ==, spa_load_guid(spa));
5104 }
5105
5106 /*
5107 * Rename the pool to a different name and then rename it back.
5108 */
5109 /* ARGSUSED */
5110 void
5111 ztest_spa_rename(ztest_ds_t *zd, uint64_t id)
5112 {
5113 char *oldname, *newname;
5114 spa_t *spa;
5115
5116 (void) rw_wrlock(&ztest_name_lock);
5117
5118 oldname = ztest_opts.zo_pool;
5119 newname = umem_alloc(strlen(oldname) + 5, UMEM_NOFAIL);
5120 (void) strcpy(newname, oldname);
5121 (void) strcat(newname, "_tmp");
5122
5123 /*
5124 * Do the rename
5125 */
5126 VERIFY3U(0, ==, spa_rename(oldname, newname));
5127
5128 /*
5129 * Try to open it under the old name, which shouldn't exist
5130 */
5131 VERIFY3U(ENOENT, ==, spa_open(oldname, &spa, FTAG));
5132
5133 /*
5134 * Open it under the new name and make sure it's still the same spa_t.
5135 */
5136 VERIFY3U(0, ==, spa_open(newname, &spa, FTAG));
5137
5138 ASSERT(spa == ztest_spa);
5139 spa_close(spa, FTAG);
5140
5141 /*
5142 * Rename it back to the original
5143 */
5144 VERIFY3U(0, ==, spa_rename(newname, oldname));
5145
5146 /*
5147 * Make sure it can still be opened
5148 */
5149 VERIFY3U(0, ==, spa_open(oldname, &spa, FTAG));
5150
5151 ASSERT(spa == ztest_spa);
5152 spa_close(spa, FTAG);
5153
5154 umem_free(newname, strlen(newname) + 1);
5155
5156 (void) rw_unlock(&ztest_name_lock);
5157 }
5158
5159 /*
5160 * Verify pool integrity by running zdb.
5161 */
5162 static void
5163 ztest_run_zdb(char *pool)
5164 {
5165 int status;
5166 char zdb[MAXPATHLEN + MAXNAMELEN + 20];
5167 char zbuf[1024];
5168 char *bin;
5169 char *ztest;
5170 char *isa;
5171 int isalen;
5172 FILE *fp;
5173
5174 (void) realpath(getexecname(), zdb);
5175
5176 /* zdb lives in /usr/sbin, while ztest lives in /usr/bin */
5177 bin = strstr(zdb, "/usr/bin/");
5178 ztest = strstr(bin, "/ztest");
5179 isa = bin + 8;
5180 isalen = ztest - isa;
5181 isa = strdup(isa);
5182 /* LINTED */
5183 (void) sprintf(bin,
5184 "/usr/sbin%.*s/zdb -bcc%s%s -d -U %s %s",
5185 isalen,
5186 isa,
5187 ztest_opts.zo_verbose >= 3 ? "s" : "",
5188 ztest_opts.zo_verbose >= 4 ? "v" : "",
5189 spa_config_path,
5190 pool);
5191 free(isa);
5192
5193 if (ztest_opts.zo_verbose >= 5)
5194 (void) printf("Executing %s\n", strstr(zdb, "zdb "));
5195
5196 fp = popen(zdb, "r");
5197
5198 while (fgets(zbuf, sizeof (zbuf), fp) != NULL)
5199 if (ztest_opts.zo_verbose >= 3)
5200 (void) printf("%s", zbuf);
5201
5202 status = pclose(fp);
5203
5204 if (status == 0)
5205 return;
5206
5207 ztest_dump_core = 0;
5208 if (WIFEXITED(status))
5209 fatal(0, "'%s' exit code %d", zdb, WEXITSTATUS(status));
5210 else
5211 fatal(0, "'%s' died with signal %d", zdb, WTERMSIG(status));
5212 }
5213
5214 static void
5215 ztest_walk_pool_directory(char *header)
5216 {
5217 spa_t *spa = NULL;
5218
5219 if (ztest_opts.zo_verbose >= 6)
5220 (void) printf("%s\n", header);
5221
5222 mutex_enter(&spa_namespace_lock);
5223 while ((spa = spa_next(spa)) != NULL)
5224 if (ztest_opts.zo_verbose >= 6)
5225 (void) printf("\t%s\n", spa_name(spa));
5226 mutex_exit(&spa_namespace_lock);
5227 }
5228
5229 static void
5230 ztest_spa_import_export(char *oldname, char *newname)
5231 {
5232 nvlist_t *config, *newconfig;
5233 uint64_t pool_guid;
5234 spa_t *spa;
5235 int error;
5236
5237 if (ztest_opts.zo_verbose >= 4) {
5238 (void) printf("import/export: old = %s, new = %s\n",
5239 oldname, newname);
5240 }
5241
5242 /*
5243 * Clean up from previous runs.
5244 */
5245 (void) spa_destroy(newname);
5246
5247 /*
5248 * Get the pool's configuration and guid.
5249 */
5250 VERIFY3U(0, ==, spa_open(oldname, &spa, FTAG));
5251
5252 /*
5253 * Kick off a scrub to tickle scrub/export races.
5254 */
5255 if (ztest_random(2) == 0)
5256 (void) spa_scan(spa, POOL_SCAN_SCRUB);
5257
5258 pool_guid = spa_guid(spa);
5259 spa_close(spa, FTAG);
5260
5261 ztest_walk_pool_directory("pools before export");
5262
5263 /*
5264 * Export it.
5265 */
5266 VERIFY3U(0, ==, spa_export(oldname, &config, B_FALSE, B_FALSE));
5267
5268 ztest_walk_pool_directory("pools after export");
5269
5270 /*
5271 * Try to import it.
5272 */
5273 newconfig = spa_tryimport(config);
5274 ASSERT(newconfig != NULL);
5275 nvlist_free(newconfig);
5276
5277 /*
5278 * Import it under the new name.
5279 */
5280 error = spa_import(newname, config, NULL, 0);
5281 if (error != 0) {
5282 dump_nvlist(config, 0);
5283 fatal(B_FALSE, "couldn't import pool %s as %s: error %u",
5284 oldname, newname, error);
5285 }
5286
5287 ztest_walk_pool_directory("pools after import");
5288
5289 /*
5290 * Try to import it again -- should fail with EEXIST.
5291 */
5292 VERIFY3U(EEXIST, ==, spa_import(newname, config, NULL, 0));
5293
5294 /*
5295 * Try to import it under a different name -- should fail with EEXIST.
5296 */
5297 VERIFY3U(EEXIST, ==, spa_import(oldname, config, NULL, 0));
5298
5299 /*
5300 * Verify that the pool is no longer visible under the old name.
5301 */
5302 VERIFY3U(ENOENT, ==, spa_open(oldname, &spa, FTAG));
5303
5304 /*
5305 * Verify that we can open and close the pool using the new name.
5306 */
5307 VERIFY3U(0, ==, spa_open(newname, &spa, FTAG));
5308 ASSERT(pool_guid == spa_guid(spa));
5309 spa_close(spa, FTAG);
5310
5311 nvlist_free(config);
5312 }
5313
5314 static void
5315 ztest_resume(spa_t *spa)
5316 {
5317 if (spa_suspended(spa) && ztest_opts.zo_verbose >= 6)
5318 (void) printf("resuming from suspended state\n");
5319 spa_vdev_state_enter(spa, SCL_NONE);
5320 vdev_clear(spa, NULL);
5321 (void) spa_vdev_state_exit(spa, NULL, 0);
5322 (void) zio_resume(spa);
5323 }
5324
5325 static void *
5326 ztest_resume_thread(void *arg)
5327 {
5328 spa_t *spa = arg;
5329
5330 while (!ztest_exiting) {
5331 if (spa_suspended(spa))
5332 ztest_resume(spa);
5333 (void) poll(NULL, 0, 100);
5334 }
5335 return (NULL);
5336 }
5337
5338 static void *
5339 ztest_deadman_thread(void *arg)
5340 {
5341 ztest_shared_t *zs = arg;
5342 spa_t *spa = ztest_spa;
5343 hrtime_t delta, total = 0;
5344
5345 for (;;) {
5346 delta = zs->zs_thread_stop - zs->zs_thread_start +
5347 MSEC2NSEC(zfs_deadman_synctime_ms);
5348
5349 (void) poll(NULL, 0, (int)NSEC2MSEC(delta));
5350
5351 /*
5352 * If the pool is suspended then fail immediately. Otherwise,
5353 * check to see if the pool is making any progress. If
5354 * vdev_deadman() discovers that there hasn't been any recent
5355 * I/Os then it will end up aborting the tests.
5356 */
5357 if (spa_suspended(spa) || spa->spa_root_vdev == NULL) {
5358 fatal(0, "aborting test after %llu seconds because "
5359 "pool has transitioned to a suspended state.",
5360 zfs_deadman_synctime_ms / 1000);
5361 return (NULL);
5362 }
5363 vdev_deadman(spa->spa_root_vdev);
5364
5365 total += zfs_deadman_synctime_ms/1000;
5366 (void) printf("ztest has been running for %lld seconds\n",
5367 total);
5368 }
5369 }
5370
5371 static void
5372 ztest_execute(int test, ztest_info_t *zi, uint64_t id)
5373 {
5374 ztest_ds_t *zd = &ztest_ds[id % ztest_opts.zo_datasets];
5375 ztest_shared_callstate_t *zc = ZTEST_GET_SHARED_CALLSTATE(test);
5376 hrtime_t functime = gethrtime();
5377
5378 for (int i = 0; i < zi->zi_iters; i++)
5379 zi->zi_func(zd, id);
5380
5381 functime = gethrtime() - functime;
5382
5383 atomic_add_64(&zc->zc_count, 1);
5384 atomic_add_64(&zc->zc_time, functime);
5385
5386 if (ztest_opts.zo_verbose >= 4) {
5387 Dl_info dli;
5388 (void) dladdr((void *)zi->zi_func, &dli);
5389 (void) printf("%6.2f sec in %s\n",
5390 (double)functime / NANOSEC, dli.dli_sname);
5391 }
5392 }
5393
5394 static void *
5395 ztest_thread(void *arg)
5396 {
5397 int rand;
5398 uint64_t id = (uintptr_t)arg;
5399 ztest_shared_t *zs = ztest_shared;
5400 uint64_t call_next;
5401 hrtime_t now;
5402 ztest_info_t *zi;
5403 ztest_shared_callstate_t *zc;
5404
5405 while ((now = gethrtime()) < zs->zs_thread_stop) {
5406 /*
5407 * See if it's time to force a crash.
5408 */
5409 if (now > zs->zs_thread_kill)
5410 ztest_kill(zs);
5411
5412 /*
5413 * If we're getting ENOSPC with some regularity, stop.
5414 */
5415 if (zs->zs_enospc_count > 10)
5416 break;
5417
5418 /*
5419 * Pick a random function to execute.
5420 */
5421 rand = ztest_random(ZTEST_FUNCS);
5422 zi = &ztest_info[rand];
5423 zc = ZTEST_GET_SHARED_CALLSTATE(rand);
5424 call_next = zc->zc_next;
5425
5426 if (now >= call_next &&
5427 atomic_cas_64(&zc->zc_next, call_next, call_next +
5428 ztest_random(2 * zi->zi_interval[0] + 1)) == call_next) {
5429 ztest_execute(rand, zi, id);
5430 }
5431 }
5432
5433 return (NULL);
5434 }
5435
5436 static void
5437 ztest_dataset_name(char *dsname, char *pool, int d)
5438 {
5439 (void) snprintf(dsname, MAXNAMELEN, "%s/ds_%d", pool, d);
5440 }
5441
5442 static void
5443 ztest_dataset_destroy(int d)
5444 {
5445 char name[MAXNAMELEN];
5446
5447 ztest_dataset_name(name, ztest_opts.zo_pool, d);
5448
5449 if (ztest_opts.zo_verbose >= 3)
5450 (void) printf("Destroying %s to free up space\n", name);
5451
5452 /*
5453 * Cleanup any non-standard clones and snapshots. In general,
5454 * ztest thread t operates on dataset (t % zopt_datasets),
5455 * so there may be more than one thing to clean up.
5456 */
5457 for (int t = d; t < ztest_opts.zo_threads;
5458 t += ztest_opts.zo_datasets) {
5459 ztest_dsl_dataset_cleanup(name, t);
5460 }
5461
5462 (void) dmu_objset_find(name, ztest_objset_destroy_cb, NULL,
5463 DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
5464 }
5465
5466 static void
5467 ztest_dataset_dirobj_verify(ztest_ds_t *zd)
5468 {
5469 uint64_t usedobjs, dirobjs, scratch;
5470
5471 /*
5472 * ZTEST_DIROBJ is the object directory for the entire dataset.
5473 * Therefore, the number of objects in use should equal the
5474 * number of ZTEST_DIROBJ entries, +1 for ZTEST_DIROBJ itself.
5475 * If not, we have an object leak.
5476 *
5477 * Note that we can only check this in ztest_dataset_open(),
5478 * when the open-context and syncing-context values agree.
5479 * That's because zap_count() returns the open-context value,
5480 * while dmu_objset_space() returns the rootbp fill count.
5481 */
5482 VERIFY3U(0, ==, zap_count(zd->zd_os, ZTEST_DIROBJ, &dirobjs));
5483 dmu_objset_space(zd->zd_os, &scratch, &scratch, &usedobjs, &scratch);
5484 ASSERT3U(dirobjs + 1, ==, usedobjs);
5485 }
5486
5487 static int
5488 ztest_dataset_open(int d)
5489 {
5490 ztest_ds_t *zd = &ztest_ds[d];
5491 uint64_t committed_seq = ZTEST_GET_SHARED_DS(d)->zd_seq;
5492 objset_t *os;
5493 zilog_t *zilog;
5494 char name[MAXNAMELEN];
5495 int error;
5496
5497 ztest_dataset_name(name, ztest_opts.zo_pool, d);
5498
5499 (void) rw_rdlock(&ztest_name_lock);
5500
5501 error = ztest_dataset_create(name);
5502 if (error == ENOSPC) {
5503 (void) rw_unlock(&ztest_name_lock);
5504 ztest_record_enospc(FTAG);
5505 return (error);
5506 }
5507 ASSERT(error == 0 || error == EEXIST);
5508
5509 VERIFY0(dmu_objset_own(name, DMU_OST_OTHER, B_FALSE, zd, &os));
5510 (void) rw_unlock(&ztest_name_lock);
5511
5512 ztest_zd_init(zd, ZTEST_GET_SHARED_DS(d), os);
5513
5514 zilog = zd->zd_zilog;
5515
5516 if (zilog->zl_header->zh_claim_lr_seq != 0 &&
5517 zilog->zl_header->zh_claim_lr_seq < committed_seq)
5518 fatal(0, "missing log records: claimed %llu < committed %llu",
5519 zilog->zl_header->zh_claim_lr_seq, committed_seq);
5520
5521 ztest_dataset_dirobj_verify(zd);
5522
5523 zil_replay(os, zd, ztest_replay_vector);
5524
5525 ztest_dataset_dirobj_verify(zd);
5526
5527 if (ztest_opts.zo_verbose >= 6)
5528 (void) printf("%s replay %llu blocks, %llu records, seq %llu\n",
5529 zd->zd_name,
5530 (u_longlong_t)zilog->zl_parse_blk_count,
5531 (u_longlong_t)zilog->zl_parse_lr_count,
5532 (u_longlong_t)zilog->zl_replaying_seq);
5533
5534 zilog = zil_open(os, ztest_get_data);
5535
5536 if (zilog->zl_replaying_seq != 0 &&
5537 zilog->zl_replaying_seq < committed_seq)
5538 fatal(0, "missing log records: replayed %llu < committed %llu",
5539 zilog->zl_replaying_seq, committed_seq);
5540
5541 return (0);
5542 }
5543
5544 static void
5545 ztest_dataset_close(int d)
5546 {
5547 ztest_ds_t *zd = &ztest_ds[d];
5548
5549 zil_close(zd->zd_zilog);
5550 dmu_objset_disown(zd->zd_os, zd);
5551
5552 ztest_zd_fini(zd);
5553 }
5554
5555 /*
5556 * Kick off threads to run tests on all datasets in parallel.
5557 */
5558 static void
5559 ztest_run(ztest_shared_t *zs)
5560 {
5561 thread_t *tid;
5562 spa_t *spa;
5563 objset_t *os;
5564 thread_t resume_tid;
5565 int error;
5566
5567 ztest_exiting = B_FALSE;
5568
5569 /*
5570 * Initialize parent/child shared state.
5571 */
5572 VERIFY(_mutex_init(&ztest_vdev_lock, USYNC_THREAD, NULL) == 0);
5573 VERIFY(rwlock_init(&ztest_name_lock, USYNC_THREAD, NULL) == 0);
5574
5575 zs->zs_thread_start = gethrtime();
5576 zs->zs_thread_stop =
5577 zs->zs_thread_start + ztest_opts.zo_passtime * NANOSEC;
5578 zs->zs_thread_stop = MIN(zs->zs_thread_stop, zs->zs_proc_stop);
5579 zs->zs_thread_kill = zs->zs_thread_stop;
5580 if (ztest_random(100) < ztest_opts.zo_killrate) {
5581 zs->zs_thread_kill -=
5582 ztest_random(ztest_opts.zo_passtime * NANOSEC);
5583 }
5584
5585 (void) _mutex_init(&zcl.zcl_callbacks_lock, USYNC_THREAD, NULL);
5586
5587 list_create(&zcl.zcl_callbacks, sizeof (ztest_cb_data_t),
5588 offsetof(ztest_cb_data_t, zcd_node));
5589
5590 /*
5591 * Open our pool.
5592 */
5593 kernel_init(FREAD | FWRITE);
5594 VERIFY0(spa_open(ztest_opts.zo_pool, &spa, FTAG));
5595 spa->spa_debug = B_TRUE;
5596 ztest_spa = spa;
5597
5598 VERIFY0(dmu_objset_own(ztest_opts.zo_pool,
5599 DMU_OST_ANY, B_TRUE, FTAG, &os));
5600 zs->zs_guid = dmu_objset_fsid_guid(os);
5601 dmu_objset_disown(os, FTAG);
5602
5603 spa->spa_dedup_ditto = 2 * ZIO_DEDUPDITTO_MIN;
5604
5605 /*
5606 * We don't expect the pool to suspend unless maxfaults == 0,
5607 * in which case ztest_fault_inject() temporarily takes away
5608 * the only valid replica.
5609 */
5610 if (MAXFAULTS() == 0)
5611 spa->spa_failmode = ZIO_FAILURE_MODE_WAIT;
5612 else
5613 spa->spa_failmode = ZIO_FAILURE_MODE_PANIC;
5614
5615 /*
5616 * Create a thread to periodically resume suspended I/O.
5617 */
5618 VERIFY(thr_create(0, 0, ztest_resume_thread, spa, THR_BOUND,
5619 &resume_tid) == 0);
5620
5621 /*
5622 * Create a deadman thread to abort() if we hang.
5623 */
5624 VERIFY(thr_create(0, 0, ztest_deadman_thread, zs, THR_BOUND,
5625 NULL) == 0);
5626
5627 /*
5628 * Verify that we can safely inquire about about any object,
5629 * whether it's allocated or not. To make it interesting,
5630 * we probe a 5-wide window around each power of two.
5631 * This hits all edge cases, including zero and the max.
5632 */
5633 for (int t = 0; t < 64; t++) {
5634 for (int d = -5; d <= 5; d++) {
5635 error = dmu_object_info(spa->spa_meta_objset,
5636 (1ULL << t) + d, NULL);
5637 ASSERT(error == 0 || error == ENOENT ||
5638 error == EINVAL);
5639 }
5640 }
5641
5642 /*
5643 * If we got any ENOSPC errors on the previous run, destroy something.
5644 */
5645 if (zs->zs_enospc_count != 0) {
5646 int d = ztest_random(ztest_opts.zo_datasets);
5647 ztest_dataset_destroy(d);
5648 }
5649 zs->zs_enospc_count = 0;
5650
5651 tid = umem_zalloc(ztest_opts.zo_threads * sizeof (thread_t),
5652 UMEM_NOFAIL);
5653
5654 if (ztest_opts.zo_verbose >= 4)
5655 (void) printf("starting main threads...\n");
5656
5657 /*
5658 * Kick off all the tests that run in parallel.
5659 */
5660 for (int t = 0; t < ztest_opts.zo_threads; t++) {
5661 if (t < ztest_opts.zo_datasets &&
5662 ztest_dataset_open(t) != 0)
5663 return;
5664 VERIFY(thr_create(0, 0, ztest_thread, (void *)(uintptr_t)t,
5665 THR_BOUND, &tid[t]) == 0);
5666 }
5667
5668 /*
5669 * Wait for all of the tests to complete. We go in reverse order
5670 * so we don't close datasets while threads are still using them.
5671 */
5672 for (int t = ztest_opts.zo_threads - 1; t >= 0; t--) {
5673 VERIFY(thr_join(tid[t], NULL, NULL) == 0);
5674 if (t < ztest_opts.zo_datasets)
5675 ztest_dataset_close(t);
5676 }
5677
5678 txg_wait_synced(spa_get_dsl(spa), 0);
5679
5680 zs->zs_alloc = metaslab_class_get_alloc(spa_normal_class(spa));
5681 zs->zs_space = metaslab_class_get_space(spa_normal_class(spa));
5682 zfs_dbgmsg_print(FTAG);
5683
5684 umem_free(tid, ztest_opts.zo_threads * sizeof (thread_t));
5685
5686 /* Kill the resume thread */
5687 ztest_exiting = B_TRUE;
5688 VERIFY(thr_join(resume_tid, NULL, NULL) == 0);
5689 ztest_resume(spa);
5690
5691 /*
5692 * Right before closing the pool, kick off a bunch of async I/O;
5693 * spa_close() should wait for it to complete.
5694 */
5695 for (uint64_t object = 1; object < 50; object++)
5696 dmu_prefetch(spa->spa_meta_objset, object, 0, 1ULL << 20);
5697
5698 spa_close(spa, FTAG);
5699
5700 /*
5701 * Verify that we can loop over all pools.
5702 */
5703 mutex_enter(&spa_namespace_lock);
5704 for (spa = spa_next(NULL); spa != NULL; spa = spa_next(spa))
5705 if (ztest_opts.zo_verbose > 3)
5706 (void) printf("spa_next: found %s\n", spa_name(spa));
5707 mutex_exit(&spa_namespace_lock);
5708
5709 /*
5710 * Verify that we can export the pool and reimport it under a
5711 * different name.
5712 */
5713 if (ztest_random(2) == 0) {
5714 char name[MAXNAMELEN];
5715 (void) snprintf(name, MAXNAMELEN, "%s_import",
5716 ztest_opts.zo_pool);
5717 ztest_spa_import_export(ztest_opts.zo_pool, name);
5718 ztest_spa_import_export(name, ztest_opts.zo_pool);
5719 }
5720
5721 kernel_fini();
5722
5723 list_destroy(&zcl.zcl_callbacks);
5724
5725 (void) _mutex_destroy(&zcl.zcl_callbacks_lock);
5726
5727 (void) rwlock_destroy(&ztest_name_lock);
5728 (void) _mutex_destroy(&ztest_vdev_lock);
5729 }
5730
5731 static void
5732 ztest_freeze(void)
5733 {
5734 ztest_ds_t *zd = &ztest_ds[0];
5735 spa_t *spa;
5736 int numloops = 0;
5737
5738 if (ztest_opts.zo_verbose >= 3)
5739 (void) printf("testing spa_freeze()...\n");
5740
5741 kernel_init(FREAD | FWRITE);
5742 VERIFY3U(0, ==, spa_open(ztest_opts.zo_pool, &spa, FTAG));
5743 VERIFY3U(0, ==, ztest_dataset_open(0));
5744 spa->spa_debug = B_TRUE;
5745 ztest_spa = spa;
5746
5747 /*
5748 * Force the first log block to be transactionally allocated.
5749 * We have to do this before we freeze the pool -- otherwise
5750 * the log chain won't be anchored.
5751 */
5752 while (BP_IS_HOLE(&zd->zd_zilog->zl_header->zh_log)) {
5753 ztest_dmu_object_alloc_free(zd, 0);
5754 zil_commit(zd->zd_zilog, 0);
5755 }
5756
5757 txg_wait_synced(spa_get_dsl(spa), 0);
5758
5759 /*
5760 * Freeze the pool. This stops spa_sync() from doing anything,
5761 * so that the only way to record changes from now on is the ZIL.
5762 */
5763 spa_freeze(spa);
5764
5765 /*
5766 * Run tests that generate log records but don't alter the pool config
5767 * or depend on DSL sync tasks (snapshots, objset create/destroy, etc).
5768 * We do a txg_wait_synced() after each iteration to force the txg
5769 * to increase well beyond the last synced value in the uberblock.
5770 * The ZIL should be OK with that.
5771 */
5772 while (ztest_random(10) != 0 &&
5773 numloops++ < ztest_opts.zo_maxloops) {
5774 ztest_dmu_write_parallel(zd, 0);
5775 ztest_dmu_object_alloc_free(zd, 0);
5776 txg_wait_synced(spa_get_dsl(spa), 0);
5777 }
5778
5779 /*
5780 * Commit all of the changes we just generated.
5781 */
5782 zil_commit(zd->zd_zilog, 0);
5783 txg_wait_synced(spa_get_dsl(spa), 0);
5784
5785 /*
5786 * Close our dataset and close the pool.
5787 */
5788 ztest_dataset_close(0);
5789 spa_close(spa, FTAG);
5790 kernel_fini();
5791
5792 /*
5793 * Open and close the pool and dataset to induce log replay.
5794 */
5795 kernel_init(FREAD | FWRITE);
5796 VERIFY3U(0, ==, spa_open(ztest_opts.zo_pool, &spa, FTAG));
5797 ASSERT(spa_freeze_txg(spa) == UINT64_MAX);
5798 VERIFY3U(0, ==, ztest_dataset_open(0));
5799 ztest_dataset_close(0);
5800
5801 spa->spa_debug = B_TRUE;
5802 ztest_spa = spa;
5803 txg_wait_synced(spa_get_dsl(spa), 0);
5804 ztest_reguid(NULL, 0);
5805
5806 spa_close(spa, FTAG);
5807 kernel_fini();
5808 }
5809
5810 void
5811 print_time(hrtime_t t, char *timebuf)
5812 {
5813 hrtime_t s = t / NANOSEC;
5814 hrtime_t m = s / 60;
5815 hrtime_t h = m / 60;
5816 hrtime_t d = h / 24;
5817
5818 s -= m * 60;
5819 m -= h * 60;
5820 h -= d * 24;
5821
5822 timebuf[0] = '\0';
5823
5824 if (d)
5825 (void) sprintf(timebuf,
5826 "%llud%02lluh%02llum%02llus", d, h, m, s);
5827 else if (h)
5828 (void) sprintf(timebuf, "%lluh%02llum%02llus", h, m, s);
5829 else if (m)
5830 (void) sprintf(timebuf, "%llum%02llus", m, s);
5831 else
5832 (void) sprintf(timebuf, "%llus", s);
5833 }
5834
5835 static nvlist_t *
5836 make_random_props()
5837 {
5838 nvlist_t *props;
5839
5840 VERIFY(nvlist_alloc(&props, NV_UNIQUE_NAME, 0) == 0);
5841 if (ztest_random(2) == 0)
5842 return (props);
5843 VERIFY(nvlist_add_uint64(props, "autoreplace", 1) == 0);
5844
5845 return (props);
5846 }
5847
5848 /*
5849 * Create a storage pool with the given name and initial vdev size.
5850 * Then test spa_freeze() functionality.
5851 */
5852 static void
5853 ztest_init(ztest_shared_t *zs)
5854 {
5855 spa_t *spa;
5856 nvlist_t *nvroot, *props;
5857
5858 VERIFY(_mutex_init(&ztest_vdev_lock, USYNC_THREAD, NULL) == 0);
5859 VERIFY(rwlock_init(&ztest_name_lock, USYNC_THREAD, NULL) == 0);
5860
5861 kernel_init(FREAD | FWRITE);
5862
5863 /*
5864 * Create the storage pool.
5865 */
5866 (void) spa_destroy(ztest_opts.zo_pool);
5867 ztest_shared->zs_vdev_next_leaf = 0;
5868 zs->zs_splits = 0;
5869 zs->zs_mirrors = ztest_opts.zo_mirrors;
5870 nvroot = make_vdev_root(NULL, NULL, NULL, ztest_opts.zo_vdev_size, 0,
5871 0, ztest_opts.zo_raidz, zs->zs_mirrors, 1);
5872 props = make_random_props();
5873 for (int i = 0; i < SPA_FEATURES; i++) {
5874 char buf[1024];
5875 (void) snprintf(buf, sizeof (buf), "feature@%s",
5876 spa_feature_table[i].fi_uname);
5877 VERIFY3U(0, ==, nvlist_add_uint64(props, buf, 0));
5878 }
5879 VERIFY3U(0, ==, spa_create(ztest_opts.zo_pool, nvroot, props, NULL));
5880 nvlist_free(nvroot);
5881
5882 VERIFY3U(0, ==, spa_open(ztest_opts.zo_pool, &spa, FTAG));
5883 zs->zs_metaslab_sz =
5884 1ULL << spa->spa_root_vdev->vdev_child[0]->vdev_ms_shift;
5885
5886 spa_close(spa, FTAG);
5887
5888 kernel_fini();
5889
5890 ztest_run_zdb(ztest_opts.zo_pool);
5891
5892 ztest_freeze();
5893
5894 ztest_run_zdb(ztest_opts.zo_pool);
5895
5896 (void) rwlock_destroy(&ztest_name_lock);
5897 (void) _mutex_destroy(&ztest_vdev_lock);
5898 }
5899
5900 static void
5901 setup_data_fd(void)
5902 {
5903 static char ztest_name_data[] = "/tmp/ztest.data.XXXXXX";
5904
5905 ztest_fd_data = mkstemp(ztest_name_data);
5906 ASSERT3S(ztest_fd_data, >=, 0);
5907 (void) unlink(ztest_name_data);
5908 }
5909
5910
5911 static int
5912 shared_data_size(ztest_shared_hdr_t *hdr)
5913 {
5914 int size;
5915
5916 size = hdr->zh_hdr_size;
5917 size += hdr->zh_opts_size;
5918 size += hdr->zh_size;
5919 size += hdr->zh_stats_size * hdr->zh_stats_count;
5920 size += hdr->zh_ds_size * hdr->zh_ds_count;
5921
5922 return (size);
5923 }
5924
5925 static void
5926 setup_hdr(void)
5927 {
5928 int size;
5929 ztest_shared_hdr_t *hdr;
5930
5931 hdr = (void *)mmap(0, P2ROUNDUP(sizeof (*hdr), getpagesize()),
5932 PROT_READ | PROT_WRITE, MAP_SHARED, ztest_fd_data, 0);
5933 ASSERT(hdr != MAP_FAILED);
5934
5935 VERIFY3U(0, ==, ftruncate(ztest_fd_data, sizeof (ztest_shared_hdr_t)));
5936
5937 hdr->zh_hdr_size = sizeof (ztest_shared_hdr_t);
5938 hdr->zh_opts_size = sizeof (ztest_shared_opts_t);
5939 hdr->zh_size = sizeof (ztest_shared_t);
5940 hdr->zh_stats_size = sizeof (ztest_shared_callstate_t);
5941 hdr->zh_stats_count = ZTEST_FUNCS;
5942 hdr->zh_ds_size = sizeof (ztest_shared_ds_t);
5943 hdr->zh_ds_count = ztest_opts.zo_datasets;
5944
5945 size = shared_data_size(hdr);
5946 VERIFY3U(0, ==, ftruncate(ztest_fd_data, size));
5947
5948 (void) munmap((caddr_t)hdr, P2ROUNDUP(sizeof (*hdr), getpagesize()));
5949 }
5950
5951 static void
5952 setup_data(void)
5953 {
5954 int size, offset;
5955 ztest_shared_hdr_t *hdr;
5956 uint8_t *buf;
5957
5958 hdr = (void *)mmap(0, P2ROUNDUP(sizeof (*hdr), getpagesize()),
5959 PROT_READ, MAP_SHARED, ztest_fd_data, 0);
5960 ASSERT(hdr != MAP_FAILED);
5961
5962 size = shared_data_size(hdr);
5963
5964 (void) munmap((caddr_t)hdr, P2ROUNDUP(sizeof (*hdr), getpagesize()));
5965 hdr = ztest_shared_hdr = (void *)mmap(0, P2ROUNDUP(size, getpagesize()),
5966 PROT_READ | PROT_WRITE, MAP_SHARED, ztest_fd_data, 0);
5967 ASSERT(hdr != MAP_FAILED);
5968 buf = (uint8_t *)hdr;
5969
5970 offset = hdr->zh_hdr_size;
5971 ztest_shared_opts = (void *)&buf[offset];
5972 offset += hdr->zh_opts_size;
5973 ztest_shared = (void *)&buf[offset];
5974 offset += hdr->zh_size;
5975 ztest_shared_callstate = (void *)&buf[offset];
5976 offset += hdr->zh_stats_size * hdr->zh_stats_count;
5977 ztest_shared_ds = (void *)&buf[offset];
5978 }
5979
5980 static boolean_t
5981 exec_child(char *cmd, char *libpath, boolean_t ignorekill, int *statusp)
5982 {
5983 pid_t pid;
5984 int status;
5985 char *cmdbuf = NULL;
5986
5987 pid = fork();
5988
5989 if (cmd == NULL) {
5990 cmdbuf = umem_alloc(MAXPATHLEN, UMEM_NOFAIL);
5991 (void) strlcpy(cmdbuf, getexecname(), MAXPATHLEN);
5992 cmd = cmdbuf;
5993 }
5994
5995 if (pid == -1)
5996 fatal(1, "fork failed");
5997
5998 if (pid == 0) { /* child */
5999 char *emptyargv[2] = { cmd, NULL };
6000 char fd_data_str[12];
6001
6002 struct rlimit rl = { 1024, 1024 };
6003 (void) setrlimit(RLIMIT_NOFILE, &rl);
6004
6005 (void) close(ztest_fd_rand);
6006 VERIFY3U(11, >=,
6007 snprintf(fd_data_str, 12, "%d", ztest_fd_data));
6008 VERIFY0(setenv("ZTEST_FD_DATA", fd_data_str, 1));
6009
6010 (void) enable_extended_FILE_stdio(-1, -1);
6011 if (libpath != NULL)
6012 VERIFY(0 == setenv("LD_LIBRARY_PATH", libpath, 1));
6013 (void) execv(cmd, emptyargv);
6014 ztest_dump_core = B_FALSE;
6015 fatal(B_TRUE, "exec failed: %s", cmd);
6016 }
6017
6018 if (cmdbuf != NULL) {
6019 umem_free(cmdbuf, MAXPATHLEN);
6020 cmd = NULL;
6021 }
6022
6023 while (waitpid(pid, &status, 0) != pid)
6024 continue;
6025 if (statusp != NULL)
6026 *statusp = status;
6027
6028 if (WIFEXITED(status)) {
6029 if (WEXITSTATUS(status) != 0) {
6030 (void) fprintf(stderr, "child exited with code %d\n",
6031 WEXITSTATUS(status));
6032 exit(2);
6033 }
6034 return (B_FALSE);
6035 } else if (WIFSIGNALED(status)) {
6036 if (!ignorekill || WTERMSIG(status) != SIGKILL) {
6037 (void) fprintf(stderr, "child died with signal %d\n",
6038 WTERMSIG(status));
6039 exit(3);
6040 }
6041 return (B_TRUE);
6042 } else {
6043 (void) fprintf(stderr, "something strange happened to child\n");
6044 exit(4);
6045 /* NOTREACHED */
6046 }
6047 }
6048
6049 static void
6050 ztest_run_init(void)
6051 {
6052 ztest_shared_t *zs = ztest_shared;
6053
6054 ASSERT(ztest_opts.zo_init != 0);
6055
6056 /*
6057 * Blow away any existing copy of zpool.cache
6058 */
6059 (void) remove(spa_config_path);
6060
6061 /*
6062 * Create and initialize our storage pool.
6063 */
6064 for (int i = 1; i <= ztest_opts.zo_init; i++) {
6065 bzero(zs, sizeof (ztest_shared_t));
6066 if (ztest_opts.zo_verbose >= 3 &&
6067 ztest_opts.zo_init != 1) {
6068 (void) printf("ztest_init(), pass %d\n", i);
6069 }
6070 ztest_init(zs);
6071 }
6072 }
6073
6074 int
6075 main(int argc, char **argv)
6076 {
6077 int kills = 0;
6078 int iters = 0;
6079 int older = 0;
6080 int newer = 0;
6081 ztest_shared_t *zs;
6082 ztest_info_t *zi;
6083 ztest_shared_callstate_t *zc;
6084 char timebuf[100];
6085 char numbuf[6];
6086 spa_t *spa;
6087 char *cmd;
6088 boolean_t hasalt;
6089 char *fd_data_str = getenv("ZTEST_FD_DATA");
6090
6091 (void) setvbuf(stdout, NULL, _IOLBF, 0);
6092
6093 dprintf_setup(&argc, argv);
6094 zfs_deadman_synctime_ms = 300000;
6095
6096 ztest_fd_rand = open("/dev/urandom", O_RDONLY);
6097 ASSERT3S(ztest_fd_rand, >=, 0);
6098
6099 if (!fd_data_str) {
6100 process_options(argc, argv);
6101
6102 setup_data_fd();
6103 setup_hdr();
6104 setup_data();
6105 bcopy(&ztest_opts, ztest_shared_opts,
6106 sizeof (*ztest_shared_opts));
6107 } else {
6108 ztest_fd_data = atoi(fd_data_str);
6109 setup_data();
6110 bcopy(ztest_shared_opts, &ztest_opts, sizeof (ztest_opts));
6111 }
6112 ASSERT3U(ztest_opts.zo_datasets, ==, ztest_shared_hdr->zh_ds_count);
6113
6114 /* Override location of zpool.cache */
6115 VERIFY3U(asprintf((char **)&spa_config_path, "%s/zpool.cache",
6116 ztest_opts.zo_dir), !=, -1);
6117
6118 ztest_ds = umem_alloc(ztest_opts.zo_datasets * sizeof (ztest_ds_t),
6119 UMEM_NOFAIL);
6120 zs = ztest_shared;
6121
6122 if (fd_data_str) {
6123 metaslab_gang_bang = ztest_opts.zo_metaslab_gang_bang;
6124 metaslab_df_alloc_threshold =
6125 zs->zs_metaslab_df_alloc_threshold;
6126
6127 if (zs->zs_do_init)
6128 ztest_run_init();
6129 else
6130 ztest_run(zs);
6131 exit(0);
6132 }
6133
6134 hasalt = (strlen(ztest_opts.zo_alt_ztest) != 0);
6135
6136 if (ztest_opts.zo_verbose >= 1) {
6137 (void) printf("%llu vdevs, %d datasets, %d threads,"
6138 " %llu seconds...\n",
6139 (u_longlong_t)ztest_opts.zo_vdevs,
6140 ztest_opts.zo_datasets,
6141 ztest_opts.zo_threads,
6142 (u_longlong_t)ztest_opts.zo_time);
6143 }
6144
6145 cmd = umem_alloc(MAXNAMELEN, UMEM_NOFAIL);
6146 (void) strlcpy(cmd, getexecname(), MAXNAMELEN);
6147
6148 zs->zs_do_init = B_TRUE;
6149 if (strlen(ztest_opts.zo_alt_ztest) != 0) {
6150 if (ztest_opts.zo_verbose >= 1) {
6151 (void) printf("Executing older ztest for "
6152 "initialization: %s\n", ztest_opts.zo_alt_ztest);
6153 }
6154 VERIFY(!exec_child(ztest_opts.zo_alt_ztest,
6155 ztest_opts.zo_alt_libpath, B_FALSE, NULL));
6156 } else {
6157 VERIFY(!exec_child(NULL, NULL, B_FALSE, NULL));
6158 }
6159 zs->zs_do_init = B_FALSE;
6160
6161 zs->zs_proc_start = gethrtime();
6162 zs->zs_proc_stop = zs->zs_proc_start + ztest_opts.zo_time * NANOSEC;
6163
6164 for (int f = 0; f < ZTEST_FUNCS; f++) {
6165 zi = &ztest_info[f];
6166 zc = ZTEST_GET_SHARED_CALLSTATE(f);
6167 if (zs->zs_proc_start + zi->zi_interval[0] > zs->zs_proc_stop)
6168 zc->zc_next = UINT64_MAX;
6169 else
6170 zc->zc_next = zs->zs_proc_start +
6171 ztest_random(2 * zi->zi_interval[0] + 1);
6172 }
6173
6174 /*
6175 * Run the tests in a loop. These tests include fault injection
6176 * to verify that self-healing data works, and forced crashes
6177 * to verify that we never lose on-disk consistency.
6178 */
6179 while (gethrtime() < zs->zs_proc_stop) {
6180 int status;
6181 boolean_t killed;
6182
6183 /*
6184 * Initialize the workload counters for each function.
6185 */
6186 for (int f = 0; f < ZTEST_FUNCS; f++) {
6187 zc = ZTEST_GET_SHARED_CALLSTATE(f);
6188 zc->zc_count = 0;
6189 zc->zc_time = 0;
6190 }
6191
6192 /* Set the allocation switch size */
6193 zs->zs_metaslab_df_alloc_threshold =
6194 ztest_random(zs->zs_metaslab_sz / 4) + 1;
6195
6196 if (!hasalt || ztest_random(2) == 0) {
6197 if (hasalt && ztest_opts.zo_verbose >= 1) {
6198 (void) printf("Executing newer ztest: %s\n",
6199 cmd);
6200 }
6201 newer++;
6202 killed = exec_child(cmd, NULL, B_TRUE, &status);
6203 } else {
6204 if (hasalt && ztest_opts.zo_verbose >= 1) {
6205 (void) printf("Executing older ztest: %s\n",
6206 ztest_opts.zo_alt_ztest);
6207 }
6208 older++;
6209 killed = exec_child(ztest_opts.zo_alt_ztest,
6210 ztest_opts.zo_alt_libpath, B_TRUE, &status);
6211 }
6212
6213 if (killed)
6214 kills++;
6215 iters++;
6216
6217 if (ztest_opts.zo_verbose >= 1) {
6218 hrtime_t now = gethrtime();
6219
6220 now = MIN(now, zs->zs_proc_stop);
6221 print_time(zs->zs_proc_stop - now, timebuf);
6222 nicenum(zs->zs_space, numbuf);
6223
6224 (void) printf("Pass %3d, %8s, %3llu ENOSPC, "
6225 "%4.1f%% of %5s used, %3.0f%% done, %8s to go\n",
6226 iters,
6227 WIFEXITED(status) ? "Complete" : "SIGKILL",
6228 (u_longlong_t)zs->zs_enospc_count,
6229 100.0 * zs->zs_alloc / zs->zs_space,
6230 numbuf,
6231 100.0 * (now - zs->zs_proc_start) /
6232 (ztest_opts.zo_time * NANOSEC), timebuf);
6233 }
6234
6235 if (ztest_opts.zo_verbose >= 2) {
6236 (void) printf("\nWorkload summary:\n\n");
6237 (void) printf("%7s %9s %s\n",
6238 "Calls", "Time", "Function");
6239 (void) printf("%7s %9s %s\n",
6240 "-----", "----", "--------");
6241 for (int f = 0; f < ZTEST_FUNCS; f++) {
6242 Dl_info dli;
6243
6244 zi = &ztest_info[f];
6245 zc = ZTEST_GET_SHARED_CALLSTATE(f);
6246 print_time(zc->zc_time, timebuf);
6247 (void) dladdr((void *)zi->zi_func, &dli);
6248 (void) printf("%7llu %9s %s\n",
6249 (u_longlong_t)zc->zc_count, timebuf,
6250 dli.dli_sname);
6251 }
6252 (void) printf("\n");
6253 }
6254
6255 /*
6256 * It's possible that we killed a child during a rename test,
6257 * in which case we'll have a 'ztest_tmp' pool lying around
6258 * instead of 'ztest'. Do a blind rename in case this happened.
6259 */
6260 kernel_init(FREAD);
6261 if (spa_open(ztest_opts.zo_pool, &spa, FTAG) == 0) {
6262 spa_close(spa, FTAG);
6263 } else {
6264 char tmpname[MAXNAMELEN];
6265 kernel_fini();
6266 kernel_init(FREAD | FWRITE);
6267 (void) snprintf(tmpname, sizeof (tmpname), "%s_tmp",
6268 ztest_opts.zo_pool);
6269 (void) spa_rename(tmpname, ztest_opts.zo_pool);
6270 }
6271 kernel_fini();
6272
6273 ztest_run_zdb(ztest_opts.zo_pool);
6274 }
6275
6276 if (ztest_opts.zo_verbose >= 1) {
6277 if (hasalt) {
6278 (void) printf("%d runs of older ztest: %s\n", older,
6279 ztest_opts.zo_alt_ztest);
6280 (void) printf("%d runs of newer ztest: %s\n", newer,
6281 cmd);
6282 }
6283 (void) printf("%d killed, %d completed, %.0f%% kill rate\n",
6284 kills, iters - kills, (100.0 * kills) / MAX(1, iters));
6285 }
6286
6287 umem_free(cmd, MAXNAMELEN);
6288
6289 return (0);
6290 }
Unleashed OS