Print this page
2882 implement libzfs_core
2883 changing "canmount" property to "on" should not always remount dataset
2900 "zfs snapshot" should be able to create multiple, arbitrary snapshots at once
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Chris Siden <christopher.siden@delphix.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Reviewed by: Bill Pijewski <wdp@joyent.com>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>
| Split |
Close |
| Expand all |
| Collapse all |
--- old/usr/src/lib/libzpool/common/kernel.c
+++ new/usr/src/lib/libzpool/common/kernel.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 24 */
25 25
26 26 #include <assert.h>
27 27 #include <fcntl.h>
28 28 #include <poll.h>
29 29 #include <stdio.h>
30 30 #include <stdlib.h>
31 31 #include <string.h>
32 32 #include <zlib.h>
33 33 #include <sys/spa.h>
34 34 #include <sys/stat.h>
35 35 #include <sys/processor.h>
36 36 #include <sys/zfs_context.h>
37 37 #include <sys/zmod.h>
38 38 #include <sys/utsname.h>
39 39 #include <sys/systeminfo.h>
40 40
41 41 /*
42 42 * Emulation of kernel services in userland.
43 43 */
44 44
45 45 int aok;
46 46 uint64_t physmem;
47 47 vnode_t *rootdir = (vnode_t *)0xabcd1234;
48 48 char hw_serial[HW_HOSTID_LEN];
49 49 vmem_t *zio_arena = NULL;
50 50
51 51 struct utsname utsname = {
52 52 "userland", "libzpool", "1", "1", "na"
53 53 };
54 54
55 55 /* this only exists to have its address taken */
56 56 struct proc p0;
57 57
58 58 /*
59 59 * =========================================================================
60 60 * threads
61 61 * =========================================================================
62 62 */
63 63 /*ARGSUSED*/
64 64 kthread_t *
65 65 zk_thread_create(void (*func)(), void *arg)
66 66 {
67 67 thread_t tid;
68 68
69 69 VERIFY(thr_create(0, 0, (void *(*)(void *))func, arg, THR_DETACHED,
70 70 &tid) == 0);
71 71
72 72 return ((void *)(uintptr_t)tid);
73 73 }
74 74
75 75 /*
76 76 * =========================================================================
77 77 * kstats
78 78 * =========================================================================
79 79 */
80 80 /*ARGSUSED*/
81 81 kstat_t *
82 82 kstat_create(char *module, int instance, char *name, char *class,
83 83 uchar_t type, ulong_t ndata, uchar_t ks_flag)
84 84 {
85 85 return (NULL);
86 86 }
87 87
88 88 /*ARGSUSED*/
89 89 void
90 90 kstat_install(kstat_t *ksp)
91 91 {}
92 92
93 93 /*ARGSUSED*/
94 94 void
95 95 kstat_delete(kstat_t *ksp)
96 96 {}
97 97
98 98 /*
99 99 * =========================================================================
100 100 * mutexes
101 101 * =========================================================================
102 102 */
103 103 void
104 104 zmutex_init(kmutex_t *mp)
105 105 {
106 106 mp->m_owner = NULL;
107 107 mp->initialized = B_TRUE;
108 108 (void) _mutex_init(&mp->m_lock, USYNC_THREAD, NULL);
109 109 }
110 110
111 111 void
112 112 zmutex_destroy(kmutex_t *mp)
113 113 {
114 114 ASSERT(mp->initialized == B_TRUE);
115 115 ASSERT(mp->m_owner == NULL);
116 116 (void) _mutex_destroy(&(mp)->m_lock);
117 117 mp->m_owner = (void *)-1UL;
118 118 mp->initialized = B_FALSE;
119 119 }
120 120
121 121 void
122 122 mutex_enter(kmutex_t *mp)
123 123 {
124 124 ASSERT(mp->initialized == B_TRUE);
125 125 ASSERT(mp->m_owner != (void *)-1UL);
126 126 ASSERT(mp->m_owner != curthread);
127 127 VERIFY(mutex_lock(&mp->m_lock) == 0);
128 128 ASSERT(mp->m_owner == NULL);
129 129 mp->m_owner = curthread;
130 130 }
131 131
132 132 int
133 133 mutex_tryenter(kmutex_t *mp)
134 134 {
135 135 ASSERT(mp->initialized == B_TRUE);
136 136 ASSERT(mp->m_owner != (void *)-1UL);
137 137 if (0 == mutex_trylock(&mp->m_lock)) {
138 138 ASSERT(mp->m_owner == NULL);
139 139 mp->m_owner = curthread;
140 140 return (1);
141 141 } else {
142 142 return (0);
143 143 }
144 144 }
145 145
146 146 void
147 147 mutex_exit(kmutex_t *mp)
148 148 {
149 149 ASSERT(mp->initialized == B_TRUE);
150 150 ASSERT(mutex_owner(mp) == curthread);
151 151 mp->m_owner = NULL;
152 152 VERIFY(mutex_unlock(&mp->m_lock) == 0);
153 153 }
154 154
155 155 void *
156 156 mutex_owner(kmutex_t *mp)
157 157 {
158 158 ASSERT(mp->initialized == B_TRUE);
159 159 return (mp->m_owner);
160 160 }
161 161
162 162 /*
163 163 * =========================================================================
164 164 * rwlocks
165 165 * =========================================================================
166 166 */
167 167 /*ARGSUSED*/
168 168 void
169 169 rw_init(krwlock_t *rwlp, char *name, int type, void *arg)
170 170 {
171 171 rwlock_init(&rwlp->rw_lock, USYNC_THREAD, NULL);
172 172 rwlp->rw_owner = NULL;
173 173 rwlp->initialized = B_TRUE;
174 174 }
175 175
176 176 void
177 177 rw_destroy(krwlock_t *rwlp)
178 178 {
179 179 rwlock_destroy(&rwlp->rw_lock);
180 180 rwlp->rw_owner = (void *)-1UL;
181 181 rwlp->initialized = B_FALSE;
182 182 }
183 183
184 184 void
185 185 rw_enter(krwlock_t *rwlp, krw_t rw)
186 186 {
187 187 ASSERT(!RW_LOCK_HELD(rwlp));
188 188 ASSERT(rwlp->initialized == B_TRUE);
189 189 ASSERT(rwlp->rw_owner != (void *)-1UL);
190 190 ASSERT(rwlp->rw_owner != curthread);
191 191
192 192 if (rw == RW_READER)
193 193 VERIFY(rw_rdlock(&rwlp->rw_lock) == 0);
194 194 else
195 195 VERIFY(rw_wrlock(&rwlp->rw_lock) == 0);
196 196
197 197 rwlp->rw_owner = curthread;
198 198 }
199 199
200 200 void
201 201 rw_exit(krwlock_t *rwlp)
202 202 {
203 203 ASSERT(rwlp->initialized == B_TRUE);
204 204 ASSERT(rwlp->rw_owner != (void *)-1UL);
205 205
206 206 rwlp->rw_owner = NULL;
207 207 VERIFY(rw_unlock(&rwlp->rw_lock) == 0);
208 208 }
209 209
210 210 int
211 211 rw_tryenter(krwlock_t *rwlp, krw_t rw)
212 212 {
213 213 int rv;
214 214
215 215 ASSERT(rwlp->initialized == B_TRUE);
216 216 ASSERT(rwlp->rw_owner != (void *)-1UL);
217 217
218 218 if (rw == RW_READER)
219 219 rv = rw_tryrdlock(&rwlp->rw_lock);
220 220 else
221 221 rv = rw_trywrlock(&rwlp->rw_lock);
222 222
223 223 if (rv == 0) {
224 224 rwlp->rw_owner = curthread;
225 225 return (1);
226 226 }
227 227
228 228 return (0);
229 229 }
230 230
231 231 /*ARGSUSED*/
232 232 int
233 233 rw_tryupgrade(krwlock_t *rwlp)
234 234 {
235 235 ASSERT(rwlp->initialized == B_TRUE);
236 236 ASSERT(rwlp->rw_owner != (void *)-1UL);
237 237
238 238 return (0);
239 239 }
240 240
241 241 /*
242 242 * =========================================================================
243 243 * condition variables
244 244 * =========================================================================
245 245 */
246 246 /*ARGSUSED*/
247 247 void
248 248 cv_init(kcondvar_t *cv, char *name, int type, void *arg)
249 249 {
250 250 VERIFY(cond_init(cv, type, NULL) == 0);
251 251 }
252 252
253 253 void
254 254 cv_destroy(kcondvar_t *cv)
255 255 {
256 256 VERIFY(cond_destroy(cv) == 0);
257 257 }
258 258
259 259 void
260 260 cv_wait(kcondvar_t *cv, kmutex_t *mp)
261 261 {
262 262 ASSERT(mutex_owner(mp) == curthread);
263 263 mp->m_owner = NULL;
264 264 int ret = cond_wait(cv, &mp->m_lock);
265 265 VERIFY(ret == 0 || ret == EINTR);
266 266 mp->m_owner = curthread;
267 267 }
268 268
269 269 clock_t
270 270 cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime)
271 271 {
272 272 int error;
273 273 timestruc_t ts;
274 274 clock_t delta;
275 275
276 276 top:
277 277 delta = abstime - ddi_get_lbolt();
278 278 if (delta <= 0)
279 279 return (-1);
280 280
281 281 ts.tv_sec = delta / hz;
282 282 ts.tv_nsec = (delta % hz) * (NANOSEC / hz);
283 283
284 284 ASSERT(mutex_owner(mp) == curthread);
285 285 mp->m_owner = NULL;
286 286 error = cond_reltimedwait(cv, &mp->m_lock, &ts);
287 287 mp->m_owner = curthread;
288 288
289 289 if (error == ETIME)
290 290 return (-1);
291 291
292 292 if (error == EINTR)
293 293 goto top;
294 294
295 295 ASSERT(error == 0);
296 296
297 297 return (1);
298 298 }
299 299
300 300 void
301 301 cv_signal(kcondvar_t *cv)
302 302 {
303 303 VERIFY(cond_signal(cv) == 0);
304 304 }
305 305
306 306 void
307 307 cv_broadcast(kcondvar_t *cv)
308 308 {
309 309 VERIFY(cond_broadcast(cv) == 0);
310 310 }
311 311
312 312 /*
313 313 * =========================================================================
314 314 * vnode operations
315 315 * =========================================================================
316 316 */
317 317 /*
318 318 * Note: for the xxxat() versions of these functions, we assume that the
319 319 * starting vp is always rootdir (which is true for spa_directory.c, the only
320 320 * ZFS consumer of these interfaces). We assert this is true, and then emulate
321 321 * them by adding '/' in front of the path.
322 322 */
323 323
324 324 /*ARGSUSED*/
325 325 int
326 326 vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3)
327 327 {
328 328 int fd;
329 329 vnode_t *vp;
330 330 int old_umask;
331 331 char realpath[MAXPATHLEN];
332 332 struct stat64 st;
333 333
334 334 /*
335 335 * If we're accessing a real disk from userland, we need to use
336 336 * the character interface to avoid caching. This is particularly
337 337 * important if we're trying to look at a real in-kernel storage
338 338 * pool from userland, e.g. via zdb, because otherwise we won't
339 339 * see the changes occurring under the segmap cache.
340 340 * On the other hand, the stupid character device returns zero
341 341 * for its size. So -- gag -- we open the block device to get
342 342 * its size, and remember it for subsequent VOP_GETATTR().
343 343 */
344 344 if (strncmp(path, "/dev/", 5) == 0) {
345 345 char *dsk;
346 346 fd = open64(path, O_RDONLY);
347 347 if (fd == -1)
348 348 return (errno);
349 349 if (fstat64(fd, &st) == -1) {
350 350 close(fd);
351 351 return (errno);
352 352 }
353 353 close(fd);
354 354 (void) sprintf(realpath, "%s", path);
355 355 dsk = strstr(path, "/dsk/");
356 356 if (dsk != NULL)
357 357 (void) sprintf(realpath + (dsk - path) + 1, "r%s",
358 358 dsk + 1);
359 359 } else {
360 360 (void) sprintf(realpath, "%s", path);
361 361 if (!(flags & FCREAT) && stat64(realpath, &st) == -1)
362 362 return (errno);
363 363 }
364 364
365 365 if (flags & FCREAT)
366 366 old_umask = umask(0);
367 367
368 368 /*
369 369 * The construct 'flags - FREAD' conveniently maps combinations of
370 370 * FREAD and FWRITE to the corresponding O_RDONLY, O_WRONLY, and O_RDWR.
371 371 */
372 372 fd = open64(realpath, flags - FREAD, mode);
373 373
374 374 if (flags & FCREAT)
375 375 (void) umask(old_umask);
376 376
377 377 if (fd == -1)
378 378 return (errno);
379 379
380 380 if (fstat64(fd, &st) == -1) {
381 381 close(fd);
382 382 return (errno);
383 383 }
384 384
385 385 (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
386 386
387 387 *vpp = vp = umem_zalloc(sizeof (vnode_t), UMEM_NOFAIL);
388 388
389 389 vp->v_fd = fd;
390 390 vp->v_size = st.st_size;
391 391 vp->v_path = spa_strdup(path);
392 392
393 393 return (0);
394 394 }
395 395
396 396 /*ARGSUSED*/
397 397 int
398 398 vn_openat(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2,
399 399 int x3, vnode_t *startvp, int fd)
400 400 {
401 401 char *realpath = umem_alloc(strlen(path) + 2, UMEM_NOFAIL);
402 402 int ret;
403 403
404 404 ASSERT(startvp == rootdir);
405 405 (void) sprintf(realpath, "/%s", path);
406 406
407 407 /* fd ignored for now, need if want to simulate nbmand support */
408 408 ret = vn_open(realpath, x1, flags, mode, vpp, x2, x3);
409 409
410 410 umem_free(realpath, strlen(path) + 2);
411 411
412 412 return (ret);
413 413 }
414 414
415 415 /*ARGSUSED*/
416 416 int
417 417 vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset,
418 418 int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp)
419 419 {
420 420 ssize_t iolen, split;
421 421
422 422 if (uio == UIO_READ) {
423 423 iolen = pread64(vp->v_fd, addr, len, offset);
424 424 } else {
425 425 /*
426 426 * To simulate partial disk writes, we split writes into two
427 427 * system calls so that the process can be killed in between.
428 428 */
429 429 int sectors = len >> SPA_MINBLOCKSHIFT;
430 430 split = (sectors > 0 ? rand() % sectors : 0) <<
431 431 SPA_MINBLOCKSHIFT;
432 432 iolen = pwrite64(vp->v_fd, addr, split, offset);
433 433 iolen += pwrite64(vp->v_fd, (char *)addr + split,
434 434 len - split, offset + split);
435 435 }
436 436
437 437 if (iolen == -1)
438 438 return (errno);
439 439 if (residp)
440 440 *residp = len - iolen;
441 441 else if (iolen != len)
442 442 return (EIO);
443 443 return (0);
444 444 }
445 445
446 446 void
447 447 vn_close(vnode_t *vp)
448 448 {
449 449 close(vp->v_fd);
450 450 spa_strfree(vp->v_path);
451 451 umem_free(vp, sizeof (vnode_t));
452 452 }
453 453
454 454 /*
455 455 * At a minimum we need to update the size since vdev_reopen()
456 456 * will no longer call vn_openat().
457 457 */
458 458 int
459 459 fop_getattr(vnode_t *vp, vattr_t *vap)
460 460 {
461 461 struct stat64 st;
462 462
463 463 if (fstat64(vp->v_fd, &st) == -1) {
464 464 close(vp->v_fd);
465 465 return (errno);
466 466 }
467 467
468 468 vap->va_size = st.st_size;
469 469 return (0);
470 470 }
471 471
472 472 #ifdef ZFS_DEBUG
473 473
474 474 /*
475 475 * =========================================================================
476 476 * Figure out which debugging statements to print
477 477 * =========================================================================
478 478 */
479 479
480 480 static char *dprintf_string;
481 481 static int dprintf_print_all;
482 482
483 483 int
484 484 dprintf_find_string(const char *string)
485 485 {
486 486 char *tmp_str = dprintf_string;
487 487 int len = strlen(string);
488 488
489 489 /*
490 490 * Find out if this is a string we want to print.
491 491 * String format: file1.c,function_name1,file2.c,file3.c
492 492 */
493 493
494 494 while (tmp_str != NULL) {
495 495 if (strncmp(tmp_str, string, len) == 0 &&
496 496 (tmp_str[len] == ',' || tmp_str[len] == '\0'))
497 497 return (1);
498 498 tmp_str = strchr(tmp_str, ',');
499 499 if (tmp_str != NULL)
500 500 tmp_str++; /* Get rid of , */
501 501 }
502 502 return (0);
503 503 }
504 504
505 505 void
506 506 dprintf_setup(int *argc, char **argv)
507 507 {
508 508 int i, j;
509 509
510 510 /*
511 511 * Debugging can be specified two ways: by setting the
512 512 * environment variable ZFS_DEBUG, or by including a
513 513 * "debug=..." argument on the command line. The command
514 514 * line setting overrides the environment variable.
515 515 */
516 516
517 517 for (i = 1; i < *argc; i++) {
518 518 int len = strlen("debug=");
519 519 /* First look for a command line argument */
520 520 if (strncmp("debug=", argv[i], len) == 0) {
521 521 dprintf_string = argv[i] + len;
522 522 /* Remove from args */
523 523 for (j = i; j < *argc; j++)
524 524 argv[j] = argv[j+1];
525 525 argv[j] = NULL;
526 526 (*argc)--;
527 527 }
528 528 }
529 529
530 530 if (dprintf_string == NULL) {
531 531 /* Look for ZFS_DEBUG environment variable */
532 532 dprintf_string = getenv("ZFS_DEBUG");
533 533 }
534 534
535 535 /*
536 536 * Are we just turning on all debugging?
537 537 */
538 538 if (dprintf_find_string("on"))
539 539 dprintf_print_all = 1;
540 540 }
541 541
542 542 /*
543 543 * =========================================================================
544 544 * debug printfs
545 545 * =========================================================================
546 546 */
547 547 void
548 548 __dprintf(const char *file, const char *func, int line, const char *fmt, ...)
549 549 {
550 550 const char *newfile;
551 551 va_list adx;
552 552
553 553 /*
554 554 * Get rid of annoying "../common/" prefix to filename.
555 555 */
556 556 newfile = strrchr(file, '/');
557 557 if (newfile != NULL) {
558 558 newfile = newfile + 1; /* Get rid of leading / */
559 559 } else {
560 560 newfile = file;
561 561 }
562 562
563 563 if (dprintf_print_all ||
564 564 dprintf_find_string(newfile) ||
565 565 dprintf_find_string(func)) {
566 566 /* Print out just the function name if requested */
567 567 flockfile(stdout);
568 568 if (dprintf_find_string("pid"))
569 569 (void) printf("%d ", getpid());
570 570 if (dprintf_find_string("tid"))
571 571 (void) printf("%u ", thr_self());
572 572 if (dprintf_find_string("cpu"))
573 573 (void) printf("%u ", getcpuid());
574 574 if (dprintf_find_string("time"))
575 575 (void) printf("%llu ", gethrtime());
576 576 if (dprintf_find_string("long"))
577 577 (void) printf("%s, line %d: ", newfile, line);
578 578 (void) printf("%s: ", func);
579 579 va_start(adx, fmt);
580 580 (void) vprintf(fmt, adx);
581 581 va_end(adx);
582 582 funlockfile(stdout);
583 583 }
584 584 }
585 585
586 586 #endif /* ZFS_DEBUG */
587 587
588 588 /*
589 589 * =========================================================================
590 590 * cmn_err() and panic()
591 591 * =========================================================================
592 592 */
593 593 static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" };
594 594 static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" };
595 595
596 596 void
597 597 vpanic(const char *fmt, va_list adx)
598 598 {
599 599 (void) fprintf(stderr, "error: ");
600 600 (void) vfprintf(stderr, fmt, adx);
601 601 (void) fprintf(stderr, "\n");
602 602
603 603 abort(); /* think of it as a "user-level crash dump" */
604 604 }
605 605
606 606 void
607 607 panic(const char *fmt, ...)
608 608 {
609 609 va_list adx;
610 610
611 611 va_start(adx, fmt);
612 612 vpanic(fmt, adx);
613 613 va_end(adx);
614 614 }
615 615
616 616 void
617 617 vcmn_err(int ce, const char *fmt, va_list adx)
618 618 {
619 619 if (ce == CE_PANIC)
620 620 vpanic(fmt, adx);
621 621 if (ce != CE_NOTE) { /* suppress noise in userland stress testing */
622 622 (void) fprintf(stderr, "%s", ce_prefix[ce]);
623 623 (void) vfprintf(stderr, fmt, adx);
624 624 (void) fprintf(stderr, "%s", ce_suffix[ce]);
625 625 }
626 626 }
627 627
628 628 /*PRINTFLIKE2*/
629 629 void
630 630 cmn_err(int ce, const char *fmt, ...)
631 631 {
632 632 va_list adx;
633 633
634 634 va_start(adx, fmt);
635 635 vcmn_err(ce, fmt, adx);
636 636 va_end(adx);
637 637 }
638 638
639 639 /*
640 640 * =========================================================================
641 641 * kobj interfaces
642 642 * =========================================================================
643 643 */
644 644 struct _buf *
645 645 kobj_open_file(char *name)
646 646 {
647 647 struct _buf *file;
648 648 vnode_t *vp;
649 649
650 650 /* set vp as the _fd field of the file */
651 651 if (vn_openat(name, UIO_SYSSPACE, FREAD, 0, &vp, 0, 0, rootdir,
652 652 -1) != 0)
653 653 return ((void *)-1UL);
654 654
655 655 file = umem_zalloc(sizeof (struct _buf), UMEM_NOFAIL);
656 656 file->_fd = (intptr_t)vp;
657 657 return (file);
658 658 }
659 659
660 660 int
661 661 kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off)
662 662 {
663 663 ssize_t resid;
664 664
665 665 vn_rdwr(UIO_READ, (vnode_t *)file->_fd, buf, size, (offset_t)off,
666 666 UIO_SYSSPACE, 0, 0, 0, &resid);
667 667
668 668 return (size - resid);
669 669 }
670 670
671 671 void
672 672 kobj_close_file(struct _buf *file)
673 673 {
674 674 vn_close((vnode_t *)file->_fd);
675 675 umem_free(file, sizeof (struct _buf));
676 676 }
677 677
678 678 int
679 679 kobj_get_filesize(struct _buf *file, uint64_t *size)
680 680 {
681 681 struct stat64 st;
682 682 vnode_t *vp = (vnode_t *)file->_fd;
683 683
684 684 if (fstat64(vp->v_fd, &st) == -1) {
685 685 vn_close(vp);
686 686 return (errno);
687 687 }
688 688 *size = st.st_size;
689 689 return (0);
690 690 }
691 691
692 692 /*
693 693 * =========================================================================
694 694 * misc routines
695 695 * =========================================================================
696 696 */
697 697
698 698 void
699 699 delay(clock_t ticks)
700 700 {
701 701 poll(0, 0, ticks * (1000 / hz));
702 702 }
703 703
704 704 /*
705 705 * Find highest one bit set.
706 706 * Returns bit number + 1 of highest bit that is set, otherwise returns 0.
707 707 * High order bit is 31 (or 63 in _LP64 kernel).
708 708 */
709 709 int
710 710 highbit(ulong_t i)
711 711 {
712 712 register int h = 1;
713 713
714 714 if (i == 0)
715 715 return (0);
716 716 #ifdef _LP64
717 717 if (i & 0xffffffff00000000ul) {
718 718 h += 32; i >>= 32;
719 719 }
720 720 #endif
721 721 if (i & 0xffff0000) {
722 722 h += 16; i >>= 16;
723 723 }
724 724 if (i & 0xff00) {
725 725 h += 8; i >>= 8;
726 726 }
727 727 if (i & 0xf0) {
728 728 h += 4; i >>= 4;
729 729 }
730 730 if (i & 0xc) {
731 731 h += 2; i >>= 2;
732 732 }
733 733 if (i & 0x2) {
734 734 h += 1;
735 735 }
736 736 return (h);
737 737 }
738 738
739 739 static int random_fd = -1, urandom_fd = -1;
740 740
741 741 static int
742 742 random_get_bytes_common(uint8_t *ptr, size_t len, int fd)
743 743 {
744 744 size_t resid = len;
745 745 ssize_t bytes;
746 746
747 747 ASSERT(fd != -1);
748 748
749 749 while (resid != 0) {
750 750 bytes = read(fd, ptr, resid);
751 751 ASSERT3S(bytes, >=, 0);
752 752 ptr += bytes;
753 753 resid -= bytes;
754 754 }
755 755
756 756 return (0);
757 757 }
758 758
759 759 int
760 760 random_get_bytes(uint8_t *ptr, size_t len)
761 761 {
762 762 return (random_get_bytes_common(ptr, len, random_fd));
763 763 }
764 764
765 765 int
766 766 random_get_pseudo_bytes(uint8_t *ptr, size_t len)
767 767 {
768 768 return (random_get_bytes_common(ptr, len, urandom_fd));
769 769 }
770 770
771 771 int
772 772 ddi_strtoul(const char *hw_serial, char **nptr, int base, unsigned long *result)
773 773 {
774 774 char *end;
775 775
776 776 *result = strtoul(hw_serial, &end, base);
777 777 if (*result == 0)
778 778 return (errno);
779 779 return (0);
780 780 }
781 781
782 782 int
783 783 ddi_strtoull(const char *str, char **nptr, int base, u_longlong_t *result)
784 784 {
785 785 char *end;
786 786
787 787 *result = strtoull(str, &end, base);
788 788 if (*result == 0)
789 789 return (errno);
790 790 return (0);
791 791 }
792 792
793 793 /*
794 794 * =========================================================================
795 795 * kernel emulation setup & teardown
796 796 * =========================================================================
797 797 */
798 798 static int
799 799 umem_out_of_memory(void)
800 800 {
801 801 char errmsg[] = "out of memory -- generating core dump\n";
802 802
803 803 write(fileno(stderr), errmsg, sizeof (errmsg));
804 804 abort();
805 805 return (0);
806 806 }
807 807
808 808 void
809 809 kernel_init(int mode)
810 810 {
811 811 umem_nofail_callback(umem_out_of_memory);
812 812
813 813 physmem = sysconf(_SC_PHYS_PAGES);
814 814
815 815 dprintf("physmem = %llu pages (%.2f GB)\n", physmem,
816 816 (double)physmem * sysconf(_SC_PAGE_SIZE) / (1ULL << 30));
817 817
818 818 (void) snprintf(hw_serial, sizeof (hw_serial), "%ld",
819 819 (mode & FWRITE) ? gethostid() : 0);
820 820
821 821 VERIFY((random_fd = open("/dev/random", O_RDONLY)) != -1);
822 822 VERIFY((urandom_fd = open("/dev/urandom", O_RDONLY)) != -1);
823 823
824 824 system_taskq_init();
825 825
826 826 spa_init(mode);
827 827 }
828 828
829 829 void
830 830 kernel_fini(void)
831 831 {
832 832 spa_fini();
833 833
834 834 system_taskq_fini();
835 835
836 836 close(random_fd);
837 837 close(urandom_fd);
838 838
839 839 random_fd = -1;
840 840 urandom_fd = -1;
841 841 }
842 842
843 843 int
844 844 z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen)
845 845 {
846 846 int ret;
847 847 uLongf len = *dstlen;
848 848
849 849 if ((ret = uncompress(dst, &len, src, srclen)) == Z_OK)
850 850 *dstlen = (size_t)len;
851 851
852 852 return (ret);
853 853 }
854 854
855 855 int
856 856 z_compress_level(void *dst, size_t *dstlen, const void *src, size_t srclen,
857 857 int level)
858 858 {
859 859 int ret;
860 860 uLongf len = *dstlen;
861 861
862 862 if ((ret = compress2(dst, &len, src, srclen, level)) == Z_OK)
863 863 *dstlen = (size_t)len;
|
↓ open down ↓ |
863 lines elided |
↑ open up ↑ |
864 864
865 865 return (ret);
866 866 }
867 867
868 868 uid_t
869 869 crgetuid(cred_t *cr)
870 870 {
871 871 return (0);
872 872 }
873 873
874 +uid_t
875 +crgetruid(cred_t *cr)
876 +{
877 + return (0);
878 +}
879 +
874 880 gid_t
875 881 crgetgid(cred_t *cr)
876 882 {
877 883 return (0);
878 884 }
879 885
880 886 int
881 887 crgetngroups(cred_t *cr)
882 888 {
883 889 return (0);
884 890 }
885 891
886 892 gid_t *
887 893 crgetgroups(cred_t *cr)
888 894 {
889 895 return (NULL);
890 896 }
891 897
892 898 int
893 899 zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
894 900 {
895 901 return (0);
896 902 }
897 903
898 904 int
899 905 zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
900 906 {
901 907 return (0);
902 908 }
903 909
904 910 int
905 911 zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
906 912 {
907 913 return (0);
908 914 }
909 915
910 916 ksiddomain_t *
911 917 ksid_lookupdomain(const char *dom)
912 918 {
913 919 ksiddomain_t *kd;
914 920
915 921 kd = umem_zalloc(sizeof (ksiddomain_t), UMEM_NOFAIL);
916 922 kd->kd_name = spa_strdup(dom);
917 923 return (kd);
918 924 }
919 925
920 926 void
921 927 ksiddomain_rele(ksiddomain_t *ksid)
922 928 {
923 929 spa_strfree(ksid->kd_name);
924 930 umem_free(ksid, sizeof (ksiddomain_t));
925 931 }
926 932
927 933 /*
928 934 * Do not change the length of the returned string; it must be freed
929 935 * with strfree().
930 936 */
931 937 char *
932 938 kmem_asprintf(const char *fmt, ...)
933 939 {
934 940 int size;
935 941 va_list adx;
936 942 char *buf;
937 943
938 944 va_start(adx, fmt);
939 945 size = vsnprintf(NULL, 0, fmt, adx) + 1;
940 946 va_end(adx);
941 947
942 948 buf = kmem_alloc(size, KM_SLEEP);
943 949
944 950 va_start(adx, fmt);
945 951 size = vsnprintf(buf, size, fmt, adx);
946 952 va_end(adx);
947 953
948 954 return (buf);
949 955 }
950 956
951 957 /* ARGSUSED */
952 958 int
953 959 zfs_onexit_fd_hold(int fd, minor_t *minorp)
954 960 {
955 961 *minorp = 0;
956 962 return (0);
957 963 }
958 964
959 965 /* ARGSUSED */
960 966 void
961 967 zfs_onexit_fd_rele(int fd)
962 968 {
963 969 }
964 970
965 971 /* ARGSUSED */
966 972 int
967 973 zfs_onexit_add_cb(minor_t minor, void (*func)(void *), void *data,
968 974 uint64_t *action_handle)
969 975 {
970 976 return (0);
971 977 }
972 978
973 979 /* ARGSUSED */
974 980 int
975 981 zfs_onexit_del_cb(minor_t minor, uint64_t action_handle, boolean_t fire)
976 982 {
977 983 return (0);
978 984 }
979 985
980 986 /* ARGSUSED */
981 987 int
982 988 zfs_onexit_cb_data(minor_t minor, uint64_t action_handle, void **data)
983 989 {
984 990 return (0);
985 991 }
|
↓ open down ↓ |
102 lines elided |
↑ open up ↑ |
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX