1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25#include <assert.h>
26#include <fcntl.h>
27#include <poll.h>
28#include <stdio.h>
29#include <stdlib.h>
30#include <string.h>
31#include <zlib.h>
32#include <sys/spa.h>
33#include <sys/stat.h>
34#include <sys/processor.h>
35#include <sys/zfs_context.h>
36#include <sys/rrwlock.h>
37#include <sys/zmod.h>
38#include <sys/utsname.h>
39#include <sys/systeminfo.h>
40
41/*
42 * Emulation of kernel services in userland.
43 */
44
45int aok;
46uint64_t physmem;
47vnode_t *rootdir = (vnode_t *)0xabcd1234;
48char hw_serial[HW_HOSTID_LEN];
49#ifdef illumos
50kmutex_t cpu_lock;
51#endif
52
53struct utsname utsname = {
54 "userland", "libzpool", "1", "1", "na"
55};
56
57/* this only exists to have its address taken */
58struct proc p0;
59
60/*
61 * =========================================================================
62 * threads
63 * =========================================================================
64 */
65/*ARGSUSED*/
66kthread_t *
67zk_thread_create(void (*func)(), void *arg)
68{
69 thread_t tid;
70
71 VERIFY(thr_create(0, 0, (void *(*)(void *))func, arg, THR_DETACHED,
72 &tid) == 0);
73
74 return ((void *)(uintptr_t)tid);
75}
76
77/*
78 * =========================================================================
79 * kstats
80 * =========================================================================
81 */
82/*ARGSUSED*/
83kstat_t *
84kstat_create(char *module, int instance, char *name, char *class,
85 uchar_t type, ulong_t ndata, uchar_t ks_flag)
86{
87 return (NULL);
88}
89
90/*ARGSUSED*/
91void
92kstat_install(kstat_t *ksp)
93{}
94
95/*ARGSUSED*/
96void
97kstat_delete(kstat_t *ksp)
98{}
99
100/*
101 * =========================================================================
102 * mutexes
103 * =========================================================================
104 */
105void
106zmutex_init(kmutex_t *mp)
107{
108 mp->m_owner = NULL;
109 mp->initialized = B_TRUE;
110 (void) _mutex_init(&mp->m_lock, USYNC_THREAD, NULL);
111}
112
113void
114zmutex_destroy(kmutex_t *mp)
115{
116 ASSERT(mp->initialized == B_TRUE);
117 ASSERT(mp->m_owner == NULL);
118 (void) _mutex_destroy(&(mp)->m_lock);
119 mp->m_owner = (void *)-1UL;
120 mp->initialized = B_FALSE;
121}
122
123int
124zmutex_owned(kmutex_t *mp)
125{
126 ASSERT(mp->initialized == B_TRUE);
127
128 return (mp->m_owner == curthread);
129}
130
131void
132mutex_enter(kmutex_t *mp)
133{
134 ASSERT(mp->initialized == B_TRUE);
135 ASSERT(mp->m_owner != (void *)-1UL);
136 ASSERT(mp->m_owner != curthread);
137 VERIFY(mutex_lock(&mp->m_lock) == 0);
138 ASSERT(mp->m_owner == NULL);
139 mp->m_owner = curthread;
140}
141
142int
143mutex_tryenter(kmutex_t *mp)
144{
145 ASSERT(mp->initialized == B_TRUE);
146 ASSERT(mp->m_owner != (void *)-1UL);
147 if (0 == mutex_trylock(&mp->m_lock)) {
148 ASSERT(mp->m_owner == NULL);
149 mp->m_owner = curthread;
150 return (1);
151 } else {
152 return (0);
153 }
154}
155
156void
157mutex_exit(kmutex_t *mp)
158{
159 ASSERT(mp->initialized == B_TRUE);
160 ASSERT(mutex_owner(mp) == curthread);
161 mp->m_owner = NULL;
162 VERIFY(mutex_unlock(&mp->m_lock) == 0);
163}
164
165void *
166mutex_owner(kmutex_t *mp)
167{
168 ASSERT(mp->initialized == B_TRUE);
169 return (mp->m_owner);
170}
171
172/*
173 * =========================================================================
174 * rwlocks
175 * =========================================================================
176 */
177/*ARGSUSED*/
178void
179rw_init(krwlock_t *rwlp, char *name, int type, void *arg)
180{
181 rwlock_init(&rwlp->rw_lock, USYNC_THREAD, NULL);
182 rwlp->rw_owner = NULL;
183 rwlp->initialized = B_TRUE;
184 rwlp->rw_count = 0;
185}
186
187void
188rw_destroy(krwlock_t *rwlp)
189{
190 ASSERT(rwlp->rw_count == 0);
191 rwlock_destroy(&rwlp->rw_lock);
192 rwlp->rw_owner = (void *)-1UL;
193 rwlp->initialized = B_FALSE;
194}
195
196void
197rw_enter(krwlock_t *rwlp, krw_t rw)
198{
199 //ASSERT(!RW_LOCK_HELD(rwlp));
200 ASSERT(rwlp->initialized == B_TRUE);
201 ASSERT(rwlp->rw_owner != (void *)-1UL);
202 ASSERT(rwlp->rw_owner != curthread);
203
204 if (rw == RW_READER) {
205 VERIFY(rw_rdlock(&rwlp->rw_lock) == 0);
206 ASSERT(rwlp->rw_count >= 0);
207 atomic_add_int(&rwlp->rw_count, 1);
208 } else {
209 VERIFY(rw_wrlock(&rwlp->rw_lock) == 0);
210 ASSERT(rwlp->rw_count == 0);
211 rwlp->rw_count = -1;
212 rwlp->rw_owner = curthread;
213 }
214}
215
216void
217rw_exit(krwlock_t *rwlp)
218{
219 ASSERT(rwlp->initialized == B_TRUE);
220 ASSERT(rwlp->rw_owner != (void *)-1UL);
221
222 if (rwlp->rw_owner == curthread) {
223 /* Write locked. */
224 ASSERT(rwlp->rw_count == -1);
225 rwlp->rw_count = 0;
226 rwlp->rw_owner = NULL;
227 } else {
228 /* Read locked. */
229 ASSERT(rwlp->rw_count > 0);
230 atomic_add_int(&rwlp->rw_count, -1);
231 }
232 VERIFY(rw_unlock(&rwlp->rw_lock) == 0);
233}
234
235int
236rw_tryenter(krwlock_t *rwlp, krw_t rw)
237{
238 int rv;
239
240 ASSERT(rwlp->initialized == B_TRUE);
241 ASSERT(rwlp->rw_owner != (void *)-1UL);
242 ASSERT(rwlp->rw_owner != curthread);
243
244 if (rw == RW_READER)
245 rv = rw_tryrdlock(&rwlp->rw_lock);
246 else
247 rv = rw_trywrlock(&rwlp->rw_lock);
248
249 if (rv == 0) {
250 ASSERT(rwlp->rw_owner == NULL);
251 if (rw == RW_READER) {
252 ASSERT(rwlp->rw_count >= 0);
253 atomic_add_int(&rwlp->rw_count, 1);
254 } else {
255 ASSERT(rwlp->rw_count == 0);
256 rwlp->rw_count = -1;
257 rwlp->rw_owner = curthread;
258 }
259 return (1);
260 }
261
262 return (0);
263}
264
265/*ARGSUSED*/
266int
267rw_tryupgrade(krwlock_t *rwlp)
268{
269 ASSERT(rwlp->initialized == B_TRUE);
270 ASSERT(rwlp->rw_owner != (void *)-1UL);
271
272 return (0);
273}
274
275int
276rw_lock_held(krwlock_t *rwlp)
277{
278
279 return (rwlp->rw_count != 0);
280}
281
282/*
283 * =========================================================================
284 * condition variables
285 * =========================================================================
286 */
287/*ARGSUSED*/
288void
289cv_init(kcondvar_t *cv, char *name, int type, void *arg)
290{
291 VERIFY(cond_init(cv, name, NULL) == 0);
292}
293
294void
295cv_destroy(kcondvar_t *cv)
296{
297 VERIFY(cond_destroy(cv) == 0);
298}
299
300void
301cv_wait(kcondvar_t *cv, kmutex_t *mp)
302{
303 ASSERT(mutex_owner(mp) == curthread);
304 mp->m_owner = NULL;
305 int ret = cond_wait(cv, &mp->m_lock);
306 VERIFY(ret == 0 || ret == EINTR);
307 mp->m_owner = curthread;
308}
309
310clock_t
311cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime)
312{
313 int error;
314 struct timespec ts;
315 struct timeval tv;
316 clock_t delta;
317
318 abstime += ddi_get_lbolt();
319top:
320 delta = abstime - ddi_get_lbolt();
321 if (delta <= 0)
322 return (-1);
323
324 if (gettimeofday(&tv, NULL) != 0)
325 assert(!"gettimeofday() failed");
326
327 ts.tv_sec = tv.tv_sec + delta / hz;
328 ts.tv_nsec = tv.tv_usec * 1000 + (delta % hz) * (NANOSEC / hz);
329 ASSERT(ts.tv_nsec >= 0);
330
331 if (ts.tv_nsec >= NANOSEC) {
332 ts.tv_sec++;
333 ts.tv_nsec -= NANOSEC;
334 }
335
336 ASSERT(mutex_owner(mp) == curthread);
337 mp->m_owner = NULL;
338 error = pthread_cond_timedwait(cv, &mp->m_lock, &ts);
339 mp->m_owner = curthread;
340
341 if (error == EINTR)
342 goto top;
343
344 if (error == ETIMEDOUT)
345 return (-1);
346
347 ASSERT(error == 0);
348
349 return (1);
350}
351
352void
353cv_signal(kcondvar_t *cv)
354{
355 VERIFY(cond_signal(cv) == 0);
356}
357
358void
359cv_broadcast(kcondvar_t *cv)
360{
361 VERIFY(cond_broadcast(cv) == 0);
362}
363
364/*
365 * =========================================================================
366 * vnode operations
367 * =========================================================================
368 */
369/*
370 * Note: for the xxxat() versions of these functions, we assume that the
371 * starting vp is always rootdir (which is true for spa_directory.c, the only
372 * ZFS consumer of these interfaces). We assert this is true, and then emulate
373 * them by adding '/' in front of the path.
374 */
375
376/*ARGSUSED*/
377int
378vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3)
379{
380 int fd;
381 vnode_t *vp;
382 int old_umask;
383 char realpath[MAXPATHLEN];
384 struct stat64 st;
385
386 /*
387 * If we're accessing a real disk from userland, we need to use
388 * the character interface to avoid caching. This is particularly
389 * important if we're trying to look at a real in-kernel storage
390 * pool from userland, e.g. via zdb, because otherwise we won't
391 * see the changes occurring under the segmap cache.
392 * On the other hand, the stupid character device returns zero
393 * for its size. So -- gag -- we open the block device to get
394 * its size, and remember it for subsequent VOP_GETATTR().
395 */
396 if (strncmp(path, "/dev/", 5) == 0) {
397 char *dsk;
398 fd = open64(path, O_RDONLY);
399 if (fd == -1)
400 return (errno);
401 if (fstat64(fd, &st) == -1) {
402 close(fd);
403 return (errno);
404 }
405 close(fd);
406 (void) sprintf(realpath, "%s", path);
407 dsk = strstr(path, "/dsk/");
408 if (dsk != NULL)
409 (void) sprintf(realpath + (dsk - path) + 1, "r%s",
410 dsk + 1);
411 } else {
412 (void) sprintf(realpath, "%s", path);
413 if (!(flags & FCREAT) && stat64(realpath, &st) == -1)
414 return (errno);
415 }
416
417 if (flags & FCREAT)
418 old_umask = umask(0);
419
420 /*
421 * The construct 'flags - FREAD' conveniently maps combinations of
422 * FREAD and FWRITE to the corresponding O_RDONLY, O_WRONLY, and O_RDWR.
423 */
424 fd = open64(realpath, flags - FREAD, mode);
425
426 if (flags & FCREAT)
427 (void) umask(old_umask);
428
429 if (fd == -1)
430 return (errno);
431
432 if (fstat64(fd, &st) == -1) {
433 close(fd);
434 return (errno);
435 }
436
437 (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
438
439 *vpp = vp = umem_zalloc(sizeof (vnode_t), UMEM_NOFAIL);
440
441 vp->v_fd = fd;
442 vp->v_size = st.st_size;
443 vp->v_path = spa_strdup(path);
444
445 return (0);
446}
447
448/*ARGSUSED*/
449int
450vn_openat(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2,
451 int x3, vnode_t *startvp, int fd)
452{
453 char *realpath = umem_alloc(strlen(path) + 2, UMEM_NOFAIL);
454 int ret;
455
456 ASSERT(startvp == rootdir);
457 (void) sprintf(realpath, "/%s", path);
458
459 /* fd ignored for now, need if want to simulate nbmand support */
460 ret = vn_open(realpath, x1, flags, mode, vpp, x2, x3);
461
462 umem_free(realpath, strlen(path) + 2);
463
464 return (ret);
465}
466
467/*ARGSUSED*/
468int
469vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset,
470 int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp)
471{
472 ssize_t iolen, split;
473
474 if (uio == UIO_READ) {
475 iolen = pread64(vp->v_fd, addr, len, offset);
476 } else {
477 /*
478 * To simulate partial disk writes, we split writes into two
479 * system calls so that the process can be killed in between.
480 */
481 int sectors = len >> SPA_MINBLOCKSHIFT;
482 split = (sectors > 0 ? rand() % sectors : 0) <<
483 SPA_MINBLOCKSHIFT;
484 iolen = pwrite64(vp->v_fd, addr, split, offset);
485 iolen += pwrite64(vp->v_fd, (char *)addr + split,
486 len - split, offset + split);
487 }
488
489 if (iolen == -1)
490 return (errno);
491 if (residp)
492 *residp = len - iolen;
493 else if (iolen != len)
494 return (EIO);
495 return (0);
496}
497
498void
499vn_close(vnode_t *vp, int openflag, cred_t *cr, kthread_t *td)
500{
501 close(vp->v_fd);
502 spa_strfree(vp->v_path);
503 umem_free(vp, sizeof (vnode_t));
504}
505
506/*
507 * At a minimum we need to update the size since vdev_reopen()
508 * will no longer call vn_openat().
509 */
510int
511fop_getattr(vnode_t *vp, vattr_t *vap)
512{
513 struct stat64 st;
514
515 if (fstat64(vp->v_fd, &st) == -1) {
516 close(vp->v_fd);
517 return (errno);
518 }
519
520 vap->va_size = st.st_size;
521 return (0);
522}
523
524#ifdef ZFS_DEBUG
525
526/*
527 * =========================================================================
528 * Figure out which debugging statements to print
529 * =========================================================================
530 */
531
532static char *dprintf_string;
533static int dprintf_print_all;
534
535int
536dprintf_find_string(const char *string)
537{
538 char *tmp_str = dprintf_string;
539 int len = strlen(string);
540
541 /*
542 * Find out if this is a string we want to print.
543 * String format: file1.c,function_name1,file2.c,file3.c
544 */
545
546 while (tmp_str != NULL) {
547 if (strncmp(tmp_str, string, len) == 0 &&
548 (tmp_str[len] == ',' || tmp_str[len] == '\0'))
549 return (1);
550 tmp_str = strchr(tmp_str, ',');
551 if (tmp_str != NULL)
552 tmp_str++; /* Get rid of , */
553 }
554 return (0);
555}
556
557void
558dprintf_setup(int *argc, char **argv)
559{
560 int i, j;
561
562 /*
563 * Debugging can be specified two ways: by setting the
564 * environment variable ZFS_DEBUG, or by including a
565 * "debug=..." argument on the command line. The command
566 * line setting overrides the environment variable.
567 */
568
569 for (i = 1; i < *argc; i++) {
570 int len = strlen("debug=");
571 /* First look for a command line argument */
572 if (strncmp("debug=", argv[i], len) == 0) {
573 dprintf_string = argv[i] + len;
574 /* Remove from args */
575 for (j = i; j < *argc; j++)
576 argv[j] = argv[j+1];
577 argv[j] = NULL;
578 (*argc)--;
579 }
580 }
581
582 if (dprintf_string == NULL) {
583 /* Look for ZFS_DEBUG environment variable */
584 dprintf_string = getenv("ZFS_DEBUG");
585 }
586
587 /*
588 * Are we just turning on all debugging?
589 */
590 if (dprintf_find_string("on"))
591 dprintf_print_all = 1;
592}
593
594/*
595 * =========================================================================
596 * debug printfs
597 * =========================================================================
598 */
599void
600__dprintf(const char *file, const char *func, int line, const char *fmt, ...)
601{
602 const char *newfile;
603 va_list adx;
604
605 /*
606 * Get rid of annoying "../common/" prefix to filename.
607 */
608 newfile = strrchr(file, '/');
609 if (newfile != NULL) {
610 newfile = newfile + 1; /* Get rid of leading / */
611 } else {
612 newfile = file;
613 }
614
615 if (dprintf_print_all ||
616 dprintf_find_string(newfile) ||
617 dprintf_find_string(func)) {
618 /* Print out just the function name if requested */
619 flockfile(stdout);
620 if (dprintf_find_string("pid"))
621 (void) printf("%d ", getpid());
622 if (dprintf_find_string("tid"))
623 (void) printf("%u ", thr_self());
624#if 0
625 if (dprintf_find_string("cpu"))
626 (void) printf("%u ", getcpuid());
627#endif
628 if (dprintf_find_string("time"))
629 (void) printf("%llu ", gethrtime());
630 if (dprintf_find_string("long"))
631 (void) printf("%s, line %d: ", newfile, line);
632 (void) printf("%s: ", func);
633 va_start(adx, fmt);
634 (void) vprintf(fmt, adx);
635 va_end(adx);
636 funlockfile(stdout);
637 }
638}
639
640#endif /* ZFS_DEBUG */
641
642/*
643 * =========================================================================
644 * cmn_err() and panic()
645 * =========================================================================
646 */
647static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" };
648static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" };
649
650void
651vpanic(const char *fmt, va_list adx)
652{
653 (void) fprintf(stderr, "error: ");
654 (void) vfprintf(stderr, fmt, adx);
655 (void) fprintf(stderr, "\n");
656
657 abort(); /* think of it as a "user-level crash dump" */
658}
659
660void
661panic(const char *fmt, ...)
662{
663 va_list adx;
664
665 va_start(adx, fmt);
666 vpanic(fmt, adx);
667 va_end(adx);
668}
669
670void
671vcmn_err(int ce, const char *fmt, va_list adx)
672{
673 if (ce == CE_PANIC)
674 vpanic(fmt, adx);
675 if (ce != CE_NOTE) { /* suppress noise in userland stress testing */
676 (void) fprintf(stderr, "%s", ce_prefix[ce]);
677 (void) vfprintf(stderr, fmt, adx);
678 (void) fprintf(stderr, "%s", ce_suffix[ce]);
679 }
680}
681
682/*PRINTFLIKE2*/
683void
684cmn_err(int ce, const char *fmt, ...)
685{
686 va_list adx;
687
688 va_start(adx, fmt);
689 vcmn_err(ce, fmt, adx);
690 va_end(adx);
691}
692
693/*
694 * =========================================================================
695 * kobj interfaces
696 * =========================================================================
697 */
698struct _buf *
699kobj_open_file(char *name)
700{
701 struct _buf *file;
702 vnode_t *vp;
703
704 /* set vp as the _fd field of the file */
705 if (vn_openat(name, UIO_SYSSPACE, FREAD, 0, &vp, 0, 0, rootdir,
706 -1) != 0)
707 return ((void *)-1UL);
708
709 file = umem_zalloc(sizeof (struct _buf), UMEM_NOFAIL);
710 file->_fd = (intptr_t)vp;
711 return (file);
712}
713
714int
715kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off)
716{
717 ssize_t resid;
718
719 vn_rdwr(UIO_READ, (vnode_t *)file->_fd, buf, size, (offset_t)off,
720 UIO_SYSSPACE, 0, 0, 0, &resid);
721
722 return (size - resid);
723}
724
725void
726kobj_close_file(struct _buf *file)
727{
728 vn_close((vnode_t *)file->_fd, 0, NULL, NULL);
729 umem_free(file, sizeof (struct _buf));
730}
731
732int
733kobj_get_filesize(struct _buf *file, uint64_t *size)
734{
735 struct stat64 st;
736 vnode_t *vp = (vnode_t *)file->_fd;
737
738 if (fstat64(vp->v_fd, &st) == -1) {
739 vn_close(vp, 0, NULL, NULL);
740 return (errno);
741 }
742 *size = st.st_size;
743 return (0);
744}
745
746/*
747 * =========================================================================
748 * misc routines
749 * =========================================================================
750 */
751
752void
753delay(clock_t ticks)
754{
755 poll(0, 0, ticks * (1000 / hz));
756}
757
758#if 0
759/*
760 * Find highest one bit set.
761 * Returns bit number + 1 of highest bit that is set, otherwise returns 0.
762 * High order bit is 31 (or 63 in _LP64 kernel).
763 */
764int
765highbit(ulong_t i)
766{
767 register int h = 1;
768
769 if (i == 0)
770 return (0);
771#ifdef _LP64
772 if (i & 0xffffffff00000000ul) {
773 h += 32; i >>= 32;
774 }
775#endif
776 if (i & 0xffff0000) {
777 h += 16; i >>= 16;
778 }
779 if (i & 0xff00) {
780 h += 8; i >>= 8;
781 }
782 if (i & 0xf0) {
783 h += 4; i >>= 4;
784 }
785 if (i & 0xc) {
786 h += 2; i >>= 2;
787 }
788 if (i & 0x2) {
789 h += 1;
790 }
791 return (h);
792}
793#endif
794
795static int random_fd = -1, urandom_fd = -1;
796
797static int
798random_get_bytes_common(uint8_t *ptr, size_t len, int fd)
799{
800 size_t resid = len;
801 ssize_t bytes;
802
803 ASSERT(fd != -1);
804
805 while (resid != 0) {
806 bytes = read(fd, ptr, resid);
807 ASSERT3S(bytes, >=, 0);
808 ptr += bytes;
809 resid -= bytes;
810 }
811
812 return (0);
813}
814
815int
816random_get_bytes(uint8_t *ptr, size_t len)
817{
818 return (random_get_bytes_common(ptr, len, random_fd));
819}
820
821int
822random_get_pseudo_bytes(uint8_t *ptr, size_t len)
823{
824 return (random_get_bytes_common(ptr, len, urandom_fd));
825}
826
827int
828ddi_strtoul(const char *hw_serial, char **nptr, int base, unsigned long *result)
829{
830 char *end;
831
832 *result = strtoul(hw_serial, &end, base);
833 if (*result == 0)
834 return (errno);
835 return (0);
836}
837
838int
839ddi_strtoull(const char *str, char **nptr, int base, u_longlong_t *result)
840{
841 char *end;
842
843 *result = strtoull(str, &end, base);
844 if (*result == 0)
845 return (errno);
846 return (0);
847}
848
849#ifdef illumos
850/* ARGSUSED */
851cyclic_id_t
852cyclic_add(cyc_handler_t *hdlr, cyc_time_t *when)
853{
854 return (1);
855}
856
857/* ARGSUSED */
858void
859cyclic_remove(cyclic_id_t id)
860{
861}
862
863/* ARGSUSED */
864int
865cyclic_reprogram(cyclic_id_t id, hrtime_t expiration)
866{
867 return (1);
868}
869#endif
870
871/*
872 * =========================================================================
873 * kernel emulation setup & teardown
874 * =========================================================================
875 */
876static int
877umem_out_of_memory(void)
878{
879 char errmsg[] = "out of memory -- generating core dump\n";
880
881 write(fileno(stderr), errmsg, sizeof (errmsg));
882 abort();
883 return (0);
884}
885
886void
887kernel_init(int mode)
888{
889 extern uint_t rrw_tsd_key;
890
891 umem_nofail_callback(umem_out_of_memory);
892
893 physmem = sysconf(_SC_PHYS_PAGES);
894
895 dprintf("physmem = %llu pages (%.2f GB)\n", physmem,
896 (double)physmem * sysconf(_SC_PAGE_SIZE) / (1ULL << 30));
897
898 (void) snprintf(hw_serial, sizeof (hw_serial), "%lu",
899 (mode & FWRITE) ? (unsigned long)gethostid() : 0);
900
901 VERIFY((random_fd = open("/dev/random", O_RDONLY)) != -1);
902 VERIFY((urandom_fd = open("/dev/urandom", O_RDONLY)) != -1);
903
904 system_taskq_init();
905
906#ifdef illumos
907 mutex_init(&cpu_lock, NULL, MUTEX_DEFAULT, NULL);
908#endif
909
910 spa_init(mode);
911
912 tsd_create(&rrw_tsd_key, rrw_tsd_destroy);
913}
914
915void
916kernel_fini(void)
917{
918 spa_fini();
919
920 system_taskq_fini();
921
922 close(random_fd);
923 close(urandom_fd);
924
925 random_fd = -1;
926 urandom_fd = -1;
927}
928
929int
930z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen)
931{
932 int ret;
933 uLongf len = *dstlen;
934
935 if ((ret = uncompress(dst, &len, src, srclen)) == Z_OK)
936 *dstlen = (size_t)len;
937
938 return (ret);
939}
940
941int
942z_compress_level(void *dst, size_t *dstlen, const void *src, size_t srclen,
943 int level)
944{
945 int ret;
946 uLongf len = *dstlen;
947
948 if ((ret = compress2(dst, &len, src, srclen, level)) == Z_OK)
949 *dstlen = (size_t)len;
950
951 return (ret);
952}
953
954uid_t
955crgetuid(cred_t *cr)
956{
957 return (0);
958}
959
960uid_t
961crgetruid(cred_t *cr)
962{
963 return (0);
964}
965
966gid_t
967crgetgid(cred_t *cr)
968{
969 return (0);
970}
971
972int
973crgetngroups(cred_t *cr)
974{
975 return (0);
976}
977
978gid_t *
979crgetgroups(cred_t *cr)
980{
981 return (NULL);
982}
983
984int
985zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr)
986{
987 return (0);
988}
989
990int
991zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr)
992{
993 return (0);
994}
995
996int
997zfs_secpolicy_destroy_perms(const char *name, cred_t *cr)
998{
999 return (0);
1000}
1001
1002ksiddomain_t *
1003ksid_lookupdomain(const char *dom)
1004{
1005 ksiddomain_t *kd;
1006
1007 kd = umem_zalloc(sizeof (ksiddomain_t), UMEM_NOFAIL);
1008 kd->kd_name = spa_strdup(dom);
1009 return (kd);
1010}
1011
1012void
1013ksiddomain_rele(ksiddomain_t *ksid)
1014{
1015 spa_strfree(ksid->kd_name);
1016 umem_free(ksid, sizeof (ksiddomain_t));
1017}
1018
1019/*
1020 * Do not change the length of the returned string; it must be freed
1021 * with strfree().
1022 */
1023char *
1024kmem_asprintf(const char *fmt, ...)
1025{
1026 int size;
1027 va_list adx;
1028 char *buf;
1029
1030 va_start(adx, fmt);
1031 size = vsnprintf(NULL, 0, fmt, adx) + 1;
1032 va_end(adx);
1033
1034 buf = kmem_alloc(size, KM_SLEEP);
1035
1036 va_start(adx, fmt);
1037 size = vsnprintf(buf, size, fmt, adx);
1038 va_end(adx);
1039
1040 return (buf);
1041}
1042
1043/* ARGSUSED */
1044int
1045zfs_onexit_fd_hold(int fd, minor_t *minorp)
1046{
1047 *minorp = 0;
1048 return (0);
1049}
1050
1051/* ARGSUSED */
1052void
1053zfs_onexit_fd_rele(int fd)
1054{
1055}
1056
1057/* ARGSUSED */
1058int
1059zfs_onexit_add_cb(minor_t minor, void (*func)(void *), void *data,
1060 uint64_t *action_handle)
1061{
1062 return (0);
1063}
1064
1065/* ARGSUSED */
1066int
1067zfs_onexit_del_cb(minor_t minor, uint64_t action_handle, boolean_t fire)
1068{
1069 return (0);
1070}
1071
1072/* ARGSUSED */
1073int
1074zfs_onexit_cb_data(minor_t minor, uint64_t action_handle, void **data)
1075{
1076 return (0);
1077}
1078
1079#ifdef __FreeBSD__
1080/* ARGSUSED */
1081int
1082zvol_create_minors(const char *name)
1083{
1084 return (0);
1085}
1086#endif