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34dc7c2f BB |
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 | /* | |
572e2857 | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
34dc7c2f BB |
23 | */ |
24 | ||
34dc7c2f BB |
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> | |
1e33ac1e | 32 | #include <sys/signal.h> |
34dc7c2f BB |
33 | #include <sys/spa.h> |
34 | #include <sys/stat.h> | |
35 | #include <sys/processor.h> | |
36 | #include <sys/zfs_context.h> | |
34dc7c2f | 37 | #include <sys/utsname.h> |
d603ed6c | 38 | #include <sys/time.h> |
d164b209 | 39 | #include <sys/systeminfo.h> |
34dc7c2f BB |
40 | |
41 | /* | |
42 | * Emulation of kernel services in userland. | |
43 | */ | |
44 | ||
428870ff | 45 | int aok; |
34dc7c2f BB |
46 | uint64_t physmem; |
47 | vnode_t *rootdir = (vnode_t *)0xabcd1234; | |
d164b209 | 48 | char hw_serial[HW_HOSTID_LEN]; |
34dc7c2f BB |
49 | |
50 | struct utsname utsname = { | |
51 | "userland", "libzpool", "1", "1", "na" | |
52 | }; | |
53 | ||
428870ff BB |
54 | /* this only exists to have its address taken */ |
55 | struct proc p0; | |
56 | ||
34dc7c2f BB |
57 | /* |
58 | * ========================================================================= | |
59 | * threads | |
60 | * ========================================================================= | |
61 | */ | |
1e33ac1e BB |
62 | |
63 | pthread_cond_t kthread_cond = PTHREAD_COND_INITIALIZER; | |
64 | pthread_mutex_t kthread_lock = PTHREAD_MUTEX_INITIALIZER; | |
65 | pthread_key_t kthread_key; | |
66 | int kthread_nr = 0; | |
67 | ||
68 | static void | |
69 | thread_init(void) | |
70 | { | |
71 | kthread_t *kt; | |
72 | ||
73 | VERIFY3S(pthread_key_create(&kthread_key, NULL), ==, 0); | |
74 | ||
75 | /* Create entry for primary kthread */ | |
76 | kt = umem_zalloc(sizeof(kthread_t), UMEM_NOFAIL); | |
77 | kt->t_tid = pthread_self(); | |
78 | kt->t_func = NULL; | |
79 | ||
80 | VERIFY3S(pthread_setspecific(kthread_key, kt), ==, 0); | |
81 | ||
82 | /* Only the main thread should be running at the moment */ | |
83 | ASSERT3S(kthread_nr, ==, 0); | |
84 | kthread_nr = 1; | |
85 | } | |
86 | ||
87 | static void | |
88 | thread_fini(void) | |
89 | { | |
90 | kthread_t *kt = curthread; | |
91 | ||
92 | ASSERT(pthread_equal(kt->t_tid, pthread_self())); | |
93 | ASSERT3P(kt->t_func, ==, NULL); | |
94 | ||
95 | umem_free(kt, sizeof(kthread_t)); | |
96 | ||
97 | /* Wait for all threads to exit via thread_exit() */ | |
98 | VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0); | |
99 | ||
100 | kthread_nr--; /* Main thread is exiting */ | |
101 | ||
102 | while (kthread_nr > 0) | |
103 | VERIFY3S(pthread_cond_wait(&kthread_cond, &kthread_lock), ==, | |
104 | 0); | |
105 | ||
106 | ASSERT3S(kthread_nr, ==, 0); | |
107 | VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0); | |
108 | ||
109 | VERIFY3S(pthread_key_delete(kthread_key), ==, 0); | |
110 | } | |
111 | ||
34dc7c2f | 112 | kthread_t * |
1e33ac1e BB |
113 | zk_thread_current(void) |
114 | { | |
115 | kthread_t *kt = pthread_getspecific(kthread_key); | |
116 | ||
117 | ASSERT3P(kt, !=, NULL); | |
118 | ||
119 | return kt; | |
120 | } | |
121 | ||
122 | void * | |
123 | zk_thread_helper(void *arg) | |
34dc7c2f | 124 | { |
1e33ac1e BB |
125 | kthread_t *kt = (kthread_t *) arg; |
126 | ||
127 | VERIFY3S(pthread_setspecific(kthread_key, kt), ==, 0); | |
34dc7c2f | 128 | |
1e33ac1e BB |
129 | VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0); |
130 | kthread_nr++; | |
131 | VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0); | |
34dc7c2f | 132 | |
1e33ac1e BB |
133 | kt->t_tid = pthread_self(); |
134 | ((thread_func_arg_t) kt->t_func)(kt->t_arg); | |
135 | ||
136 | /* Unreachable, thread must exit with thread_exit() */ | |
137 | abort(); | |
138 | ||
139 | return NULL; | |
140 | } | |
141 | ||
142 | kthread_t * | |
143 | zk_thread_create(caddr_t stk, size_t stksize, thread_func_t func, void *arg, | |
0aebd4f9 | 144 | size_t len, proc_t *pp, int state, pri_t pri, int detachstate) |
1e33ac1e BB |
145 | { |
146 | kthread_t *kt; | |
147 | pthread_attr_t attr; | |
148 | size_t stack; | |
149 | ||
150 | ASSERT3S(state & ~TS_RUN, ==, 0); | |
151 | ||
152 | kt = umem_zalloc(sizeof(kthread_t), UMEM_NOFAIL); | |
153 | kt->t_func = func; | |
154 | kt->t_arg = arg; | |
155 | ||
156 | /* | |
157 | * The Solaris kernel stack size is 24k for x86/x86_64. | |
158 | * The Linux kernel stack size is 8k for x86/x86_64. | |
159 | * | |
160 | * We reduce the default stack size in userspace, to ensure | |
161 | * we observe stack overruns in user space as well as in | |
4b2f65b2 ED |
162 | * kernel space. In practice we can't set the userspace stack |
163 | * size to 8k because differences in stack usage between kernel | |
164 | * space and userspace could lead to spurious stack overflows | |
165 | * (especially when debugging is enabled). Nevertheless, we try | |
166 | * to set it to the lowest value that works (currently 8k*4). | |
167 | * PTHREAD_STACK_MIN is the minimum stack required for a NULL | |
168 | * procedure in user space and is added in to the stack | |
169 | * requirements. | |
1e33ac1e BB |
170 | * |
171 | * Some buggy NPTL threading implementations include the | |
172 | * guard area within the stack size allocations. In | |
173 | * this case we allocate an extra page to account for the | |
174 | * guard area since we only have two pages of usable stack | |
175 | * on Linux. | |
176 | */ | |
177 | ||
79c6e4c4 | 178 | stack = PTHREAD_STACK_MIN + MAX(stksize, STACK_SIZE) * 4; |
1e33ac1e BB |
179 | |
180 | VERIFY3S(pthread_attr_init(&attr), ==, 0); | |
181 | VERIFY3S(pthread_attr_setstacksize(&attr, stack), ==, 0); | |
182 | VERIFY3S(pthread_attr_setguardsize(&attr, PAGESIZE), ==, 0); | |
0aebd4f9 | 183 | VERIFY3S(pthread_attr_setdetachstate(&attr, detachstate), ==, 0); |
1e33ac1e BB |
184 | |
185 | VERIFY3S(pthread_create(&kt->t_tid, &attr, &zk_thread_helper, kt), | |
186 | ==, 0); | |
187 | ||
188 | VERIFY3S(pthread_attr_destroy(&attr), ==, 0); | |
189 | ||
190 | return kt; | |
191 | } | |
192 | ||
193 | void | |
194 | zk_thread_exit(void) | |
195 | { | |
196 | kthread_t *kt = curthread; | |
197 | ||
198 | ASSERT(pthread_equal(kt->t_tid, pthread_self())); | |
199 | ||
200 | umem_free(kt, sizeof(kthread_t)); | |
201 | ||
202 | pthread_mutex_lock(&kthread_lock); | |
203 | kthread_nr--; | |
204 | pthread_mutex_unlock(&kthread_lock); | |
205 | ||
206 | pthread_cond_broadcast(&kthread_cond); | |
207 | pthread_exit((void *)TS_MAGIC); | |
208 | } | |
209 | ||
210 | void | |
211 | zk_thread_join(kt_did_t tid) | |
212 | { | |
213 | void *ret; | |
214 | ||
215 | pthread_join((pthread_t)tid, &ret); | |
216 | VERIFY3P(ret, ==, (void *)TS_MAGIC); | |
34dc7c2f BB |
217 | } |
218 | ||
219 | /* | |
220 | * ========================================================================= | |
221 | * kstats | |
222 | * ========================================================================= | |
223 | */ | |
224 | /*ARGSUSED*/ | |
225 | kstat_t * | |
226 | kstat_create(char *module, int instance, char *name, char *class, | |
227 | uchar_t type, ulong_t ndata, uchar_t ks_flag) | |
228 | { | |
229 | return (NULL); | |
230 | } | |
231 | ||
232 | /*ARGSUSED*/ | |
233 | void | |
234 | kstat_install(kstat_t *ksp) | |
235 | {} | |
236 | ||
237 | /*ARGSUSED*/ | |
238 | void | |
239 | kstat_delete(kstat_t *ksp) | |
240 | {} | |
241 | ||
242 | /* | |
243 | * ========================================================================= | |
244 | * mutexes | |
245 | * ========================================================================= | |
246 | */ | |
1e33ac1e | 247 | |
34dc7c2f | 248 | void |
1e33ac1e | 249 | mutex_init(kmutex_t *mp, char *name, int type, void *cookie) |
34dc7c2f | 250 | { |
1e33ac1e BB |
251 | ASSERT3S(type, ==, MUTEX_DEFAULT); |
252 | ASSERT3P(cookie, ==, NULL); | |
253 | mp->m_owner = MTX_INIT; | |
254 | mp->m_magic = MTX_MAGIC; | |
255 | VERIFY3S(pthread_mutex_init(&mp->m_lock, NULL), ==, 0); | |
34dc7c2f BB |
256 | } |
257 | ||
258 | void | |
1e33ac1e | 259 | mutex_destroy(kmutex_t *mp) |
34dc7c2f | 260 | { |
1e33ac1e BB |
261 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
262 | ASSERT3P(mp->m_owner, ==, MTX_INIT); | |
263 | VERIFY3S(pthread_mutex_destroy(&(mp)->m_lock), ==, 0); | |
264 | mp->m_owner = MTX_DEST; | |
265 | mp->m_magic = 0; | |
34dc7c2f BB |
266 | } |
267 | ||
268 | void | |
269 | mutex_enter(kmutex_t *mp) | |
270 | { | |
1e33ac1e BB |
271 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
272 | ASSERT3P(mp->m_owner, !=, MTX_DEST); | |
273 | ASSERT3P(mp->m_owner, !=, curthread); | |
274 | VERIFY3S(pthread_mutex_lock(&mp->m_lock), ==, 0); | |
275 | ASSERT3P(mp->m_owner, ==, MTX_INIT); | |
34dc7c2f BB |
276 | mp->m_owner = curthread; |
277 | } | |
278 | ||
279 | int | |
280 | mutex_tryenter(kmutex_t *mp) | |
281 | { | |
1e33ac1e BB |
282 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
283 | ASSERT3P(mp->m_owner, !=, MTX_DEST); | |
284 | if (0 == pthread_mutex_trylock(&mp->m_lock)) { | |
285 | ASSERT3P(mp->m_owner, ==, MTX_INIT); | |
34dc7c2f BB |
286 | mp->m_owner = curthread; |
287 | return (1); | |
288 | } else { | |
289 | return (0); | |
290 | } | |
291 | } | |
292 | ||
293 | void | |
294 | mutex_exit(kmutex_t *mp) | |
295 | { | |
1e33ac1e BB |
296 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
297 | ASSERT3P(mutex_owner(mp), ==, curthread); | |
298 | mp->m_owner = MTX_INIT; | |
299 | VERIFY3S(pthread_mutex_unlock(&mp->m_lock), ==, 0); | |
34dc7c2f BB |
300 | } |
301 | ||
302 | void * | |
303 | mutex_owner(kmutex_t *mp) | |
304 | { | |
1e33ac1e | 305 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
34dc7c2f BB |
306 | return (mp->m_owner); |
307 | } | |
308 | ||
1e33ac1e BB |
309 | int |
310 | mutex_held(kmutex_t *mp) | |
311 | { | |
312 | return (mp->m_owner == curthread); | |
313 | } | |
314 | ||
34dc7c2f BB |
315 | /* |
316 | * ========================================================================= | |
317 | * rwlocks | |
318 | * ========================================================================= | |
319 | */ | |
1e33ac1e | 320 | |
34dc7c2f BB |
321 | void |
322 | rw_init(krwlock_t *rwlp, char *name, int type, void *arg) | |
323 | { | |
1e33ac1e BB |
324 | ASSERT3S(type, ==, RW_DEFAULT); |
325 | ASSERT3P(arg, ==, NULL); | |
326 | VERIFY3S(pthread_rwlock_init(&rwlp->rw_lock, NULL), ==, 0); | |
327 | rwlp->rw_owner = RW_INIT; | |
328 | rwlp->rw_wr_owner = RW_INIT; | |
329 | rwlp->rw_readers = 0; | |
330 | rwlp->rw_magic = RW_MAGIC; | |
34dc7c2f BB |
331 | } |
332 | ||
333 | void | |
334 | rw_destroy(krwlock_t *rwlp) | |
335 | { | |
1e33ac1e BB |
336 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
337 | ||
338 | VERIFY3S(pthread_rwlock_destroy(&rwlp->rw_lock), ==, 0); | |
339 | rwlp->rw_magic = 0; | |
34dc7c2f BB |
340 | } |
341 | ||
342 | void | |
343 | rw_enter(krwlock_t *rwlp, krw_t rw) | |
344 | { | |
1e33ac1e BB |
345 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
346 | ASSERT3P(rwlp->rw_owner, !=, curthread); | |
347 | ASSERT3P(rwlp->rw_wr_owner, !=, curthread); | |
34dc7c2f | 348 | |
1e33ac1e BB |
349 | if (rw == RW_READER) { |
350 | VERIFY3S(pthread_rwlock_rdlock(&rwlp->rw_lock), ==, 0); | |
351 | ASSERT3P(rwlp->rw_wr_owner, ==, RW_INIT); | |
352 | ||
353 | atomic_inc_uint(&rwlp->rw_readers); | |
354 | } else { | |
355 | VERIFY3S(pthread_rwlock_wrlock(&rwlp->rw_lock), ==, 0); | |
356 | ASSERT3P(rwlp->rw_wr_owner, ==, RW_INIT); | |
357 | ASSERT3U(rwlp->rw_readers, ==, 0); | |
358 | ||
359 | rwlp->rw_wr_owner = curthread; | |
360 | } | |
34dc7c2f BB |
361 | |
362 | rwlp->rw_owner = curthread; | |
363 | } | |
364 | ||
365 | void | |
366 | rw_exit(krwlock_t *rwlp) | |
367 | { | |
1e33ac1e BB |
368 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
369 | ASSERT(RW_LOCK_HELD(rwlp)); | |
370 | ||
371 | if (RW_READ_HELD(rwlp)) | |
372 | atomic_dec_uint(&rwlp->rw_readers); | |
373 | else | |
374 | rwlp->rw_wr_owner = RW_INIT; | |
34dc7c2f | 375 | |
1e33ac1e BB |
376 | rwlp->rw_owner = RW_INIT; |
377 | VERIFY3S(pthread_rwlock_unlock(&rwlp->rw_lock), ==, 0); | |
34dc7c2f BB |
378 | } |
379 | ||
380 | int | |
381 | rw_tryenter(krwlock_t *rwlp, krw_t rw) | |
382 | { | |
383 | int rv; | |
384 | ||
1e33ac1e | 385 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
34dc7c2f BB |
386 | |
387 | if (rw == RW_READER) | |
1e33ac1e | 388 | rv = pthread_rwlock_tryrdlock(&rwlp->rw_lock); |
34dc7c2f | 389 | else |
1e33ac1e | 390 | rv = pthread_rwlock_trywrlock(&rwlp->rw_lock); |
34dc7c2f BB |
391 | |
392 | if (rv == 0) { | |
1e33ac1e BB |
393 | ASSERT3P(rwlp->rw_wr_owner, ==, RW_INIT); |
394 | ||
395 | if (rw == RW_READER) | |
396 | atomic_inc_uint(&rwlp->rw_readers); | |
397 | else { | |
398 | ASSERT3U(rwlp->rw_readers, ==, 0); | |
399 | rwlp->rw_wr_owner = curthread; | |
400 | } | |
401 | ||
34dc7c2f BB |
402 | rwlp->rw_owner = curthread; |
403 | return (1); | |
404 | } | |
405 | ||
1e33ac1e BB |
406 | VERIFY3S(rv, ==, EBUSY); |
407 | ||
34dc7c2f BB |
408 | return (0); |
409 | } | |
410 | ||
34dc7c2f BB |
411 | int |
412 | rw_tryupgrade(krwlock_t *rwlp) | |
413 | { | |
1e33ac1e | 414 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
34dc7c2f BB |
415 | |
416 | return (0); | |
417 | } | |
418 | ||
419 | /* | |
420 | * ========================================================================= | |
421 | * condition variables | |
422 | * ========================================================================= | |
423 | */ | |
1e33ac1e | 424 | |
34dc7c2f BB |
425 | void |
426 | cv_init(kcondvar_t *cv, char *name, int type, void *arg) | |
427 | { | |
1e33ac1e BB |
428 | ASSERT3S(type, ==, CV_DEFAULT); |
429 | cv->cv_magic = CV_MAGIC; | |
430 | VERIFY3S(pthread_cond_init(&cv->cv, NULL), ==, 0); | |
34dc7c2f BB |
431 | } |
432 | ||
433 | void | |
434 | cv_destroy(kcondvar_t *cv) | |
435 | { | |
1e33ac1e BB |
436 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
437 | VERIFY3S(pthread_cond_destroy(&cv->cv), ==, 0); | |
438 | cv->cv_magic = 0; | |
34dc7c2f BB |
439 | } |
440 | ||
441 | void | |
442 | cv_wait(kcondvar_t *cv, kmutex_t *mp) | |
443 | { | |
1e33ac1e BB |
444 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
445 | ASSERT3P(mutex_owner(mp), ==, curthread); | |
446 | mp->m_owner = MTX_INIT; | |
447 | int ret = pthread_cond_wait(&cv->cv, &mp->m_lock); | |
448 | if (ret != 0) | |
449 | VERIFY3S(ret, ==, EINTR); | |
34dc7c2f BB |
450 | mp->m_owner = curthread; |
451 | } | |
452 | ||
453 | clock_t | |
454 | cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime) | |
455 | { | |
456 | int error; | |
1e33ac1e | 457 | struct timeval tv; |
34dc7c2f BB |
458 | timestruc_t ts; |
459 | clock_t delta; | |
460 | ||
1e33ac1e BB |
461 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
462 | ||
34dc7c2f | 463 | top: |
428870ff | 464 | delta = abstime - ddi_get_lbolt(); |
34dc7c2f BB |
465 | if (delta <= 0) |
466 | return (-1); | |
467 | ||
1e33ac1e BB |
468 | VERIFY(gettimeofday(&tv, NULL) == 0); |
469 | ||
470 | ts.tv_sec = tv.tv_sec + delta / hz; | |
471 | ts.tv_nsec = tv.tv_usec * 1000 + (delta % hz) * (NANOSEC / hz); | |
472 | if (ts.tv_nsec >= NANOSEC) { | |
473 | ts.tv_sec++; | |
474 | ts.tv_nsec -= NANOSEC; | |
475 | } | |
34dc7c2f | 476 | |
1e33ac1e BB |
477 | ASSERT3P(mutex_owner(mp), ==, curthread); |
478 | mp->m_owner = MTX_INIT; | |
479 | error = pthread_cond_timedwait(&cv->cv, &mp->m_lock, &ts); | |
34dc7c2f BB |
480 | mp->m_owner = curthread; |
481 | ||
1e33ac1e | 482 | if (error == ETIMEDOUT) |
34dc7c2f BB |
483 | return (-1); |
484 | ||
485 | if (error == EINTR) | |
486 | goto top; | |
487 | ||
1e33ac1e | 488 | VERIFY3S(error, ==, 0); |
34dc7c2f BB |
489 | |
490 | return (1); | |
491 | } | |
492 | ||
493 | void | |
494 | cv_signal(kcondvar_t *cv) | |
495 | { | |
1e33ac1e BB |
496 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
497 | VERIFY3S(pthread_cond_signal(&cv->cv), ==, 0); | |
34dc7c2f BB |
498 | } |
499 | ||
500 | void | |
501 | cv_broadcast(kcondvar_t *cv) | |
502 | { | |
1e33ac1e BB |
503 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
504 | VERIFY3S(pthread_cond_broadcast(&cv->cv), ==, 0); | |
34dc7c2f BB |
505 | } |
506 | ||
507 | /* | |
508 | * ========================================================================= | |
509 | * vnode operations | |
510 | * ========================================================================= | |
511 | */ | |
512 | /* | |
513 | * Note: for the xxxat() versions of these functions, we assume that the | |
514 | * starting vp is always rootdir (which is true for spa_directory.c, the only | |
515 | * ZFS consumer of these interfaces). We assert this is true, and then emulate | |
516 | * them by adding '/' in front of the path. | |
517 | */ | |
518 | ||
519 | /*ARGSUSED*/ | |
520 | int | |
521 | vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3) | |
522 | { | |
523 | int fd; | |
524 | vnode_t *vp; | |
a4914d38 | 525 | int old_umask = 0; |
5ae4e2c2 | 526 | char *realpath; |
34dc7c2f | 527 | struct stat64 st; |
4d58b69d | 528 | int err; |
34dc7c2f | 529 | |
5ae4e2c2 BB |
530 | realpath = umem_alloc(MAXPATHLEN, UMEM_NOFAIL); |
531 | ||
34dc7c2f BB |
532 | /* |
533 | * If we're accessing a real disk from userland, we need to use | |
534 | * the character interface to avoid caching. This is particularly | |
535 | * important if we're trying to look at a real in-kernel storage | |
536 | * pool from userland, e.g. via zdb, because otherwise we won't | |
537 | * see the changes occurring under the segmap cache. | |
538 | * On the other hand, the stupid character device returns zero | |
539 | * for its size. So -- gag -- we open the block device to get | |
540 | * its size, and remember it for subsequent VOP_GETATTR(). | |
541 | */ | |
d603ed6c | 542 | #if defined(__sun__) || defined(__sun) |
34dc7c2f | 543 | if (strncmp(path, "/dev/", 5) == 0) { |
d603ed6c BB |
544 | #else |
545 | if (0) { | |
546 | #endif | |
34dc7c2f BB |
547 | char *dsk; |
548 | fd = open64(path, O_RDONLY); | |
5ae4e2c2 BB |
549 | if (fd == -1) { |
550 | err = errno; | |
551 | free(realpath); | |
552 | return (err); | |
553 | } | |
34dc7c2f | 554 | if (fstat64(fd, &st) == -1) { |
5ae4e2c2 | 555 | err = errno; |
34dc7c2f | 556 | close(fd); |
5ae4e2c2 BB |
557 | free(realpath); |
558 | return (err); | |
34dc7c2f BB |
559 | } |
560 | close(fd); | |
561 | (void) sprintf(realpath, "%s", path); | |
562 | dsk = strstr(path, "/dsk/"); | |
563 | if (dsk != NULL) | |
564 | (void) sprintf(realpath + (dsk - path) + 1, "r%s", | |
565 | dsk + 1); | |
566 | } else { | |
567 | (void) sprintf(realpath, "%s", path); | |
5ae4e2c2 BB |
568 | if (!(flags & FCREAT) && stat64(realpath, &st) == -1) { |
569 | err = errno; | |
570 | free(realpath); | |
571 | return (err); | |
572 | } | |
34dc7c2f BB |
573 | } |
574 | ||
d603ed6c BB |
575 | if (!(flags & FCREAT) && S_ISBLK(st.st_mode)) { |
576 | #ifdef __linux__ | |
577 | flags |= O_DIRECT; | |
578 | #endif | |
579 | /* We shouldn't be writing to block devices in userspace */ | |
580 | VERIFY(!(flags & FWRITE)); | |
581 | } | |
582 | ||
34dc7c2f BB |
583 | if (flags & FCREAT) |
584 | old_umask = umask(0); | |
585 | ||
586 | /* | |
587 | * The construct 'flags - FREAD' conveniently maps combinations of | |
588 | * FREAD and FWRITE to the corresponding O_RDONLY, O_WRONLY, and O_RDWR. | |
589 | */ | |
590 | fd = open64(realpath, flags - FREAD, mode); | |
5ae4e2c2 | 591 | free(realpath); |
34dc7c2f BB |
592 | |
593 | if (flags & FCREAT) | |
594 | (void) umask(old_umask); | |
595 | ||
596 | if (fd == -1) | |
597 | return (errno); | |
598 | ||
8d4e8140 | 599 | if (fstat64_blk(fd, &st) == -1) { |
4d58b69d | 600 | err = errno; |
34dc7c2f | 601 | close(fd); |
4d58b69d | 602 | return (err); |
34dc7c2f BB |
603 | } |
604 | ||
605 | (void) fcntl(fd, F_SETFD, FD_CLOEXEC); | |
606 | ||
607 | *vpp = vp = umem_zalloc(sizeof (vnode_t), UMEM_NOFAIL); | |
608 | ||
609 | vp->v_fd = fd; | |
610 | vp->v_size = st.st_size; | |
611 | vp->v_path = spa_strdup(path); | |
612 | ||
613 | return (0); | |
614 | } | |
615 | ||
616 | /*ARGSUSED*/ | |
617 | int | |
618 | vn_openat(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, | |
619 | int x3, vnode_t *startvp, int fd) | |
620 | { | |
621 | char *realpath = umem_alloc(strlen(path) + 2, UMEM_NOFAIL); | |
622 | int ret; | |
623 | ||
624 | ASSERT(startvp == rootdir); | |
625 | (void) sprintf(realpath, "/%s", path); | |
626 | ||
627 | /* fd ignored for now, need if want to simulate nbmand support */ | |
628 | ret = vn_open(realpath, x1, flags, mode, vpp, x2, x3); | |
629 | ||
630 | umem_free(realpath, strlen(path) + 2); | |
631 | ||
632 | return (ret); | |
633 | } | |
634 | ||
635 | /*ARGSUSED*/ | |
636 | int | |
637 | vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset, | |
638 | int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp) | |
639 | { | |
4d58b69d | 640 | ssize_t rc, done = 0, split; |
34dc7c2f BB |
641 | |
642 | if (uio == UIO_READ) { | |
4d58b69d | 643 | rc = pread64(vp->v_fd, addr, len, offset); |
34dc7c2f BB |
644 | } else { |
645 | /* | |
646 | * To simulate partial disk writes, we split writes into two | |
647 | * system calls so that the process can be killed in between. | |
648 | */ | |
9ae529ec CS |
649 | int sectors = len >> SPA_MINBLOCKSHIFT; |
650 | split = (sectors > 0 ? rand() % sectors : 0) << | |
651 | SPA_MINBLOCKSHIFT; | |
4d58b69d RC |
652 | rc = pwrite64(vp->v_fd, addr, split, offset); |
653 | if (rc != -1) { | |
654 | done = rc; | |
655 | rc = pwrite64(vp->v_fd, (char *)addr + split, | |
656 | len - split, offset + split); | |
657 | } | |
34dc7c2f BB |
658 | } |
659 | ||
d603ed6c BB |
660 | #ifdef __linux__ |
661 | if (rc == -1 && errno == EINVAL) { | |
662 | /* | |
663 | * Under Linux, this most likely means an alignment issue | |
664 | * (memory or disk) due to O_DIRECT, so we abort() in order to | |
665 | * catch the offender. | |
666 | */ | |
667 | abort(); | |
668 | } | |
669 | #endif | |
4d58b69d | 670 | if (rc == -1) |
34dc7c2f | 671 | return (errno); |
4d58b69d RC |
672 | |
673 | done += rc; | |
674 | ||
34dc7c2f | 675 | if (residp) |
4d58b69d RC |
676 | *residp = len - done; |
677 | else if (done != len) | |
34dc7c2f BB |
678 | return (EIO); |
679 | return (0); | |
680 | } | |
681 | ||
682 | void | |
683 | vn_close(vnode_t *vp) | |
684 | { | |
685 | close(vp->v_fd); | |
686 | spa_strfree(vp->v_path); | |
687 | umem_free(vp, sizeof (vnode_t)); | |
688 | } | |
689 | ||
428870ff BB |
690 | /* |
691 | * At a minimum we need to update the size since vdev_reopen() | |
692 | * will no longer call vn_openat(). | |
693 | */ | |
694 | int | |
695 | fop_getattr(vnode_t *vp, vattr_t *vap) | |
696 | { | |
697 | struct stat64 st; | |
8d4e8140 | 698 | int err; |
428870ff | 699 | |
8d4e8140 RC |
700 | if (fstat64_blk(vp->v_fd, &st) == -1) { |
701 | err = errno; | |
428870ff | 702 | close(vp->v_fd); |
8d4e8140 | 703 | return (err); |
428870ff BB |
704 | } |
705 | ||
706 | vap->va_size = st.st_size; | |
707 | return (0); | |
708 | } | |
709 | ||
34dc7c2f BB |
710 | /* |
711 | * ========================================================================= | |
712 | * Figure out which debugging statements to print | |
713 | * ========================================================================= | |
714 | */ | |
715 | ||
716 | static char *dprintf_string; | |
717 | static int dprintf_print_all; | |
718 | ||
719 | int | |
720 | dprintf_find_string(const char *string) | |
721 | { | |
722 | char *tmp_str = dprintf_string; | |
723 | int len = strlen(string); | |
724 | ||
725 | /* | |
726 | * Find out if this is a string we want to print. | |
727 | * String format: file1.c,function_name1,file2.c,file3.c | |
728 | */ | |
729 | ||
730 | while (tmp_str != NULL) { | |
731 | if (strncmp(tmp_str, string, len) == 0 && | |
732 | (tmp_str[len] == ',' || tmp_str[len] == '\0')) | |
733 | return (1); | |
734 | tmp_str = strchr(tmp_str, ','); | |
735 | if (tmp_str != NULL) | |
736 | tmp_str++; /* Get rid of , */ | |
737 | } | |
738 | return (0); | |
739 | } | |
740 | ||
741 | void | |
742 | dprintf_setup(int *argc, char **argv) | |
743 | { | |
744 | int i, j; | |
745 | ||
746 | /* | |
747 | * Debugging can be specified two ways: by setting the | |
748 | * environment variable ZFS_DEBUG, or by including a | |
749 | * "debug=..." argument on the command line. The command | |
750 | * line setting overrides the environment variable. | |
751 | */ | |
752 | ||
753 | for (i = 1; i < *argc; i++) { | |
754 | int len = strlen("debug="); | |
755 | /* First look for a command line argument */ | |
756 | if (strncmp("debug=", argv[i], len) == 0) { | |
757 | dprintf_string = argv[i] + len; | |
758 | /* Remove from args */ | |
759 | for (j = i; j < *argc; j++) | |
760 | argv[j] = argv[j+1]; | |
761 | argv[j] = NULL; | |
762 | (*argc)--; | |
763 | } | |
764 | } | |
765 | ||
766 | if (dprintf_string == NULL) { | |
767 | /* Look for ZFS_DEBUG environment variable */ | |
768 | dprintf_string = getenv("ZFS_DEBUG"); | |
769 | } | |
770 | ||
771 | /* | |
772 | * Are we just turning on all debugging? | |
773 | */ | |
774 | if (dprintf_find_string("on")) | |
775 | dprintf_print_all = 1; | |
776 | } | |
777 | ||
778 | /* | |
779 | * ========================================================================= | |
780 | * debug printfs | |
781 | * ========================================================================= | |
782 | */ | |
783 | void | |
784 | __dprintf(const char *file, const char *func, int line, const char *fmt, ...) | |
785 | { | |
786 | const char *newfile; | |
787 | va_list adx; | |
788 | ||
789 | /* | |
790 | * Get rid of annoying "../common/" prefix to filename. | |
791 | */ | |
792 | newfile = strrchr(file, '/'); | |
793 | if (newfile != NULL) { | |
794 | newfile = newfile + 1; /* Get rid of leading / */ | |
795 | } else { | |
796 | newfile = file; | |
797 | } | |
798 | ||
799 | if (dprintf_print_all || | |
800 | dprintf_find_string(newfile) || | |
801 | dprintf_find_string(func)) { | |
802 | /* Print out just the function name if requested */ | |
803 | flockfile(stdout); | |
804 | if (dprintf_find_string("pid")) | |
805 | (void) printf("%d ", getpid()); | |
806 | if (dprintf_find_string("tid")) | |
1e33ac1e | 807 | (void) printf("%u ", (uint_t) pthread_self()); |
34dc7c2f BB |
808 | if (dprintf_find_string("cpu")) |
809 | (void) printf("%u ", getcpuid()); | |
810 | if (dprintf_find_string("time")) | |
811 | (void) printf("%llu ", gethrtime()); | |
812 | if (dprintf_find_string("long")) | |
813 | (void) printf("%s, line %d: ", newfile, line); | |
814 | (void) printf("%s: ", func); | |
815 | va_start(adx, fmt); | |
816 | (void) vprintf(fmt, adx); | |
817 | va_end(adx); | |
818 | funlockfile(stdout); | |
819 | } | |
820 | } | |
821 | ||
34dc7c2f BB |
822 | /* |
823 | * ========================================================================= | |
824 | * cmn_err() and panic() | |
825 | * ========================================================================= | |
826 | */ | |
827 | static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; | |
828 | static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; | |
829 | ||
830 | void | |
831 | vpanic(const char *fmt, va_list adx) | |
832 | { | |
833 | (void) fprintf(stderr, "error: "); | |
834 | (void) vfprintf(stderr, fmt, adx); | |
835 | (void) fprintf(stderr, "\n"); | |
836 | ||
837 | abort(); /* think of it as a "user-level crash dump" */ | |
838 | } | |
839 | ||
840 | void | |
841 | panic(const char *fmt, ...) | |
842 | { | |
843 | va_list adx; | |
844 | ||
845 | va_start(adx, fmt); | |
846 | vpanic(fmt, adx); | |
847 | va_end(adx); | |
848 | } | |
849 | ||
850 | void | |
851 | vcmn_err(int ce, const char *fmt, va_list adx) | |
852 | { | |
853 | if (ce == CE_PANIC) | |
854 | vpanic(fmt, adx); | |
855 | if (ce != CE_NOTE) { /* suppress noise in userland stress testing */ | |
856 | (void) fprintf(stderr, "%s", ce_prefix[ce]); | |
857 | (void) vfprintf(stderr, fmt, adx); | |
858 | (void) fprintf(stderr, "%s", ce_suffix[ce]); | |
859 | } | |
860 | } | |
861 | ||
862 | /*PRINTFLIKE2*/ | |
863 | void | |
864 | cmn_err(int ce, const char *fmt, ...) | |
865 | { | |
866 | va_list adx; | |
867 | ||
868 | va_start(adx, fmt); | |
869 | vcmn_err(ce, fmt, adx); | |
870 | va_end(adx); | |
871 | } | |
872 | ||
873 | /* | |
874 | * ========================================================================= | |
875 | * kobj interfaces | |
876 | * ========================================================================= | |
877 | */ | |
878 | struct _buf * | |
879 | kobj_open_file(char *name) | |
880 | { | |
881 | struct _buf *file; | |
882 | vnode_t *vp; | |
883 | ||
884 | /* set vp as the _fd field of the file */ | |
885 | if (vn_openat(name, UIO_SYSSPACE, FREAD, 0, &vp, 0, 0, rootdir, | |
886 | -1) != 0) | |
887 | return ((void *)-1UL); | |
888 | ||
889 | file = umem_zalloc(sizeof (struct _buf), UMEM_NOFAIL); | |
890 | file->_fd = (intptr_t)vp; | |
891 | return (file); | |
892 | } | |
893 | ||
894 | int | |
895 | kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off) | |
896 | { | |
897 | ssize_t resid; | |
898 | ||
899 | vn_rdwr(UIO_READ, (vnode_t *)file->_fd, buf, size, (offset_t)off, | |
900 | UIO_SYSSPACE, 0, 0, 0, &resid); | |
901 | ||
902 | return (size - resid); | |
903 | } | |
904 | ||
905 | void | |
906 | kobj_close_file(struct _buf *file) | |
907 | { | |
908 | vn_close((vnode_t *)file->_fd); | |
909 | umem_free(file, sizeof (struct _buf)); | |
910 | } | |
911 | ||
912 | int | |
913 | kobj_get_filesize(struct _buf *file, uint64_t *size) | |
914 | { | |
915 | struct stat64 st; | |
916 | vnode_t *vp = (vnode_t *)file->_fd; | |
917 | ||
918 | if (fstat64(vp->v_fd, &st) == -1) { | |
919 | vn_close(vp); | |
920 | return (errno); | |
921 | } | |
922 | *size = st.st_size; | |
923 | return (0); | |
924 | } | |
925 | ||
926 | /* | |
927 | * ========================================================================= | |
928 | * misc routines | |
929 | * ========================================================================= | |
930 | */ | |
931 | ||
932 | void | |
933 | delay(clock_t ticks) | |
934 | { | |
935 | poll(0, 0, ticks * (1000 / hz)); | |
936 | } | |
937 | ||
938 | /* | |
939 | * Find highest one bit set. | |
940 | * Returns bit number + 1 of highest bit that is set, otherwise returns 0. | |
941 | * High order bit is 31 (or 63 in _LP64 kernel). | |
942 | */ | |
943 | int | |
944 | highbit(ulong_t i) | |
945 | { | |
946 | register int h = 1; | |
947 | ||
948 | if (i == 0) | |
949 | return (0); | |
950 | #ifdef _LP64 | |
951 | if (i & 0xffffffff00000000ul) { | |
952 | h += 32; i >>= 32; | |
953 | } | |
954 | #endif | |
955 | if (i & 0xffff0000) { | |
956 | h += 16; i >>= 16; | |
957 | } | |
958 | if (i & 0xff00) { | |
959 | h += 8; i >>= 8; | |
960 | } | |
961 | if (i & 0xf0) { | |
962 | h += 4; i >>= 4; | |
963 | } | |
964 | if (i & 0xc) { | |
965 | h += 2; i >>= 2; | |
966 | } | |
967 | if (i & 0x2) { | |
968 | h += 1; | |
969 | } | |
970 | return (h); | |
971 | } | |
972 | ||
973 | static int random_fd = -1, urandom_fd = -1; | |
974 | ||
975 | static int | |
976 | random_get_bytes_common(uint8_t *ptr, size_t len, int fd) | |
977 | { | |
978 | size_t resid = len; | |
979 | ssize_t bytes; | |
980 | ||
981 | ASSERT(fd != -1); | |
982 | ||
983 | while (resid != 0) { | |
984 | bytes = read(fd, ptr, resid); | |
985 | ASSERT3S(bytes, >=, 0); | |
986 | ptr += bytes; | |
987 | resid -= bytes; | |
988 | } | |
989 | ||
990 | return (0); | |
991 | } | |
992 | ||
993 | int | |
994 | random_get_bytes(uint8_t *ptr, size_t len) | |
995 | { | |
996 | return (random_get_bytes_common(ptr, len, random_fd)); | |
997 | } | |
998 | ||
999 | int | |
1000 | random_get_pseudo_bytes(uint8_t *ptr, size_t len) | |
1001 | { | |
1002 | return (random_get_bytes_common(ptr, len, urandom_fd)); | |
1003 | } | |
1004 | ||
1005 | int | |
1006 | ddi_strtoul(const char *hw_serial, char **nptr, int base, unsigned long *result) | |
1007 | { | |
1008 | char *end; | |
1009 | ||
1010 | *result = strtoul(hw_serial, &end, base); | |
1011 | if (*result == 0) | |
1012 | return (errno); | |
1013 | return (0); | |
1014 | } | |
1015 | ||
428870ff BB |
1016 | int |
1017 | ddi_strtoull(const char *str, char **nptr, int base, u_longlong_t *result) | |
1018 | { | |
1019 | char *end; | |
1020 | ||
1021 | *result = strtoull(str, &end, base); | |
1022 | if (*result == 0) | |
1023 | return (errno); | |
1024 | return (0); | |
1025 | } | |
1026 | ||
34dc7c2f BB |
1027 | /* |
1028 | * ========================================================================= | |
1029 | * kernel emulation setup & teardown | |
1030 | * ========================================================================= | |
1031 | */ | |
1032 | static int | |
1033 | umem_out_of_memory(void) | |
1034 | { | |
1035 | char errmsg[] = "out of memory -- generating core dump\n"; | |
1036 | ||
0e5b68e0 | 1037 | (void) fprintf(stderr, "%s", errmsg); |
34dc7c2f BB |
1038 | abort(); |
1039 | return (0); | |
1040 | } | |
1041 | ||
1042 | void | |
1043 | kernel_init(int mode) | |
1044 | { | |
1045 | umem_nofail_callback(umem_out_of_memory); | |
1046 | ||
1047 | physmem = sysconf(_SC_PHYS_PAGES); | |
1048 | ||
1049 | dprintf("physmem = %llu pages (%.2f GB)\n", physmem, | |
1050 | (double)physmem * sysconf(_SC_PAGE_SIZE) / (1ULL << 30)); | |
1051 | ||
428870ff BB |
1052 | (void) snprintf(hw_serial, sizeof (hw_serial), "%ld", |
1053 | (mode & FWRITE) ? gethostid() : 0); | |
34dc7c2f BB |
1054 | |
1055 | VERIFY((random_fd = open("/dev/random", O_RDONLY)) != -1); | |
1056 | VERIFY((urandom_fd = open("/dev/urandom", O_RDONLY)) != -1); | |
1057 | ||
1e33ac1e | 1058 | thread_init(); |
b128c09f BB |
1059 | system_taskq_init(); |
1060 | ||
34dc7c2f BB |
1061 | spa_init(mode); |
1062 | } | |
1063 | ||
1064 | void | |
1065 | kernel_fini(void) | |
1066 | { | |
1067 | spa_fini(); | |
1068 | ||
428870ff | 1069 | system_taskq_fini(); |
1e33ac1e | 1070 | thread_fini(); |
428870ff | 1071 | |
34dc7c2f BB |
1072 | close(random_fd); |
1073 | close(urandom_fd); | |
1074 | ||
1075 | random_fd = -1; | |
1076 | urandom_fd = -1; | |
1077 | } | |
1078 | ||
34dc7c2f BB |
1079 | uid_t |
1080 | crgetuid(cred_t *cr) | |
1081 | { | |
1082 | return (0); | |
1083 | } | |
1084 | ||
1085 | gid_t | |
1086 | crgetgid(cred_t *cr) | |
1087 | { | |
1088 | return (0); | |
1089 | } | |
1090 | ||
1091 | int | |
1092 | crgetngroups(cred_t *cr) | |
1093 | { | |
1094 | return (0); | |
1095 | } | |
1096 | ||
1097 | gid_t * | |
1098 | crgetgroups(cred_t *cr) | |
1099 | { | |
1100 | return (NULL); | |
1101 | } | |
1102 | ||
1103 | int | |
1104 | zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) | |
1105 | { | |
1106 | return (0); | |
1107 | } | |
1108 | ||
1109 | int | |
1110 | zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) | |
1111 | { | |
1112 | return (0); | |
1113 | } | |
1114 | ||
1115 | int | |
1116 | zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) | |
1117 | { | |
1118 | return (0); | |
1119 | } | |
1120 | ||
1121 | ksiddomain_t * | |
1122 | ksid_lookupdomain(const char *dom) | |
1123 | { | |
1124 | ksiddomain_t *kd; | |
1125 | ||
1126 | kd = umem_zalloc(sizeof (ksiddomain_t), UMEM_NOFAIL); | |
1127 | kd->kd_name = spa_strdup(dom); | |
1128 | return (kd); | |
1129 | } | |
1130 | ||
1131 | void | |
1132 | ksiddomain_rele(ksiddomain_t *ksid) | |
1133 | { | |
1134 | spa_strfree(ksid->kd_name); | |
1135 | umem_free(ksid, sizeof (ksiddomain_t)); | |
1136 | } | |
428870ff | 1137 | |
428870ff | 1138 | char * |
00b46022 | 1139 | kmem_vasprintf(const char *fmt, va_list adx) |
428870ff | 1140 | { |
00b46022 BB |
1141 | char *buf = NULL; |
1142 | va_list adx_copy; | |
428870ff | 1143 | |
00b46022 BB |
1144 | va_copy(adx_copy, adx); |
1145 | VERIFY(vasprintf(&buf, fmt, adx_copy) != -1); | |
1146 | va_end(adx_copy); | |
428870ff | 1147 | |
00b46022 BB |
1148 | return (buf); |
1149 | } | |
1150 | ||
1151 | char * | |
1152 | kmem_asprintf(const char *fmt, ...) | |
1153 | { | |
1154 | char *buf = NULL; | |
1155 | va_list adx; | |
428870ff BB |
1156 | |
1157 | va_start(adx, fmt); | |
00b46022 | 1158 | VERIFY(vasprintf(&buf, fmt, adx) != -1); |
428870ff BB |
1159 | va_end(adx); |
1160 | ||
1161 | return (buf); | |
1162 | } | |
572e2857 BB |
1163 | |
1164 | /* ARGSUSED */ | |
1165 | int | |
1166 | zfs_onexit_fd_hold(int fd, minor_t *minorp) | |
1167 | { | |
1168 | *minorp = 0; | |
1169 | return (0); | |
1170 | } | |
1171 | ||
1172 | /* ARGSUSED */ | |
1173 | void | |
1174 | zfs_onexit_fd_rele(int fd) | |
1175 | { | |
1176 | } | |
1177 | ||
1178 | /* ARGSUSED */ | |
1179 | int | |
1180 | zfs_onexit_add_cb(minor_t minor, void (*func)(void *), void *data, | |
1181 | uint64_t *action_handle) | |
1182 | { | |
1183 | return (0); | |
1184 | } | |
1185 | ||
1186 | /* ARGSUSED */ | |
1187 | int | |
1188 | zfs_onexit_del_cb(minor_t minor, uint64_t action_handle, boolean_t fire) | |
1189 | { | |
1190 | return (0); | |
1191 | } | |
1192 | ||
1193 | /* ARGSUSED */ | |
1194 | int | |
1195 | zfs_onexit_cb_data(minor_t minor, uint64_t action_handle, void **data) | |
1196 | { | |
1197 | return (0); | |
1198 | } |