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Commit | Line | Data |
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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> | |
13fe0198 | 37 | #include <sys/rrwlock.h> |
34dc7c2f | 38 | #include <sys/utsname.h> |
d603ed6c | 39 | #include <sys/time.h> |
d164b209 | 40 | #include <sys/systeminfo.h> |
34dc7c2f BB |
41 | |
42 | /* | |
43 | * Emulation of kernel services in userland. | |
44 | */ | |
45 | ||
428870ff | 46 | int aok; |
34dc7c2f BB |
47 | uint64_t physmem; |
48 | vnode_t *rootdir = (vnode_t *)0xabcd1234; | |
d164b209 | 49 | char hw_serial[HW_HOSTID_LEN]; |
34dc7c2f BB |
50 | |
51 | struct utsname utsname = { | |
52 | "userland", "libzpool", "1", "1", "na" | |
53 | }; | |
54 | ||
428870ff BB |
55 | /* this only exists to have its address taken */ |
56 | struct proc p0; | |
57 | ||
34dc7c2f BB |
58 | /* |
59 | * ========================================================================= | |
60 | * threads | |
61 | * ========================================================================= | |
62 | */ | |
1e33ac1e BB |
63 | |
64 | pthread_cond_t kthread_cond = PTHREAD_COND_INITIALIZER; | |
65 | pthread_mutex_t kthread_lock = PTHREAD_MUTEX_INITIALIZER; | |
66 | pthread_key_t kthread_key; | |
67 | int kthread_nr = 0; | |
68 | ||
69 | static void | |
70 | thread_init(void) | |
71 | { | |
72 | kthread_t *kt; | |
73 | ||
74 | VERIFY3S(pthread_key_create(&kthread_key, NULL), ==, 0); | |
75 | ||
76 | /* Create entry for primary kthread */ | |
77 | kt = umem_zalloc(sizeof(kthread_t), UMEM_NOFAIL); | |
78 | kt->t_tid = pthread_self(); | |
79 | kt->t_func = NULL; | |
80 | ||
81 | VERIFY3S(pthread_setspecific(kthread_key, kt), ==, 0); | |
82 | ||
83 | /* Only the main thread should be running at the moment */ | |
84 | ASSERT3S(kthread_nr, ==, 0); | |
85 | kthread_nr = 1; | |
86 | } | |
87 | ||
88 | static void | |
89 | thread_fini(void) | |
90 | { | |
91 | kthread_t *kt = curthread; | |
92 | ||
93 | ASSERT(pthread_equal(kt->t_tid, pthread_self())); | |
94 | ASSERT3P(kt->t_func, ==, NULL); | |
95 | ||
96 | umem_free(kt, sizeof(kthread_t)); | |
97 | ||
98 | /* Wait for all threads to exit via thread_exit() */ | |
99 | VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0); | |
100 | ||
101 | kthread_nr--; /* Main thread is exiting */ | |
102 | ||
103 | while (kthread_nr > 0) | |
104 | VERIFY3S(pthread_cond_wait(&kthread_cond, &kthread_lock), ==, | |
105 | 0); | |
106 | ||
107 | ASSERT3S(kthread_nr, ==, 0); | |
108 | VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0); | |
109 | ||
110 | VERIFY3S(pthread_key_delete(kthread_key), ==, 0); | |
111 | } | |
112 | ||
34dc7c2f | 113 | kthread_t * |
1e33ac1e BB |
114 | zk_thread_current(void) |
115 | { | |
116 | kthread_t *kt = pthread_getspecific(kthread_key); | |
117 | ||
118 | ASSERT3P(kt, !=, NULL); | |
119 | ||
120 | return kt; | |
121 | } | |
122 | ||
123 | void * | |
124 | zk_thread_helper(void *arg) | |
34dc7c2f | 125 | { |
1e33ac1e BB |
126 | kthread_t *kt = (kthread_t *) arg; |
127 | ||
128 | VERIFY3S(pthread_setspecific(kthread_key, kt), ==, 0); | |
34dc7c2f | 129 | |
1e33ac1e BB |
130 | VERIFY3S(pthread_mutex_lock(&kthread_lock), ==, 0); |
131 | kthread_nr++; | |
132 | VERIFY3S(pthread_mutex_unlock(&kthread_lock), ==, 0); | |
34dc7c2f | 133 | |
1e33ac1e BB |
134 | kt->t_tid = pthread_self(); |
135 | ((thread_func_arg_t) kt->t_func)(kt->t_arg); | |
136 | ||
137 | /* Unreachable, thread must exit with thread_exit() */ | |
138 | abort(); | |
139 | ||
140 | return NULL; | |
141 | } | |
142 | ||
143 | kthread_t * | |
144 | zk_thread_create(caddr_t stk, size_t stksize, thread_func_t func, void *arg, | |
0aebd4f9 | 145 | size_t len, proc_t *pp, int state, pri_t pri, int detachstate) |
1e33ac1e BB |
146 | { |
147 | kthread_t *kt; | |
148 | pthread_attr_t attr; | |
149 | size_t stack; | |
150 | ||
151 | ASSERT3S(state & ~TS_RUN, ==, 0); | |
152 | ||
153 | kt = umem_zalloc(sizeof(kthread_t), UMEM_NOFAIL); | |
154 | kt->t_func = func; | |
155 | kt->t_arg = arg; | |
156 | ||
157 | /* | |
158 | * The Solaris kernel stack size is 24k for x86/x86_64. | |
159 | * The Linux kernel stack size is 8k for x86/x86_64. | |
160 | * | |
161 | * We reduce the default stack size in userspace, to ensure | |
162 | * we observe stack overruns in user space as well as in | |
4b2f65b2 ED |
163 | * kernel space. In practice we can't set the userspace stack |
164 | * size to 8k because differences in stack usage between kernel | |
165 | * space and userspace could lead to spurious stack overflows | |
166 | * (especially when debugging is enabled). Nevertheless, we try | |
167 | * to set it to the lowest value that works (currently 8k*4). | |
168 | * PTHREAD_STACK_MIN is the minimum stack required for a NULL | |
169 | * procedure in user space and is added in to the stack | |
170 | * requirements. | |
1e33ac1e BB |
171 | * |
172 | * Some buggy NPTL threading implementations include the | |
173 | * guard area within the stack size allocations. In | |
174 | * this case we allocate an extra page to account for the | |
175 | * guard area since we only have two pages of usable stack | |
176 | * on Linux. | |
177 | */ | |
178 | ||
79c6e4c4 | 179 | stack = PTHREAD_STACK_MIN + MAX(stksize, STACK_SIZE) * 4; |
1e33ac1e BB |
180 | |
181 | VERIFY3S(pthread_attr_init(&attr), ==, 0); | |
182 | VERIFY3S(pthread_attr_setstacksize(&attr, stack), ==, 0); | |
183 | VERIFY3S(pthread_attr_setguardsize(&attr, PAGESIZE), ==, 0); | |
0aebd4f9 | 184 | VERIFY3S(pthread_attr_setdetachstate(&attr, detachstate), ==, 0); |
1e33ac1e BB |
185 | |
186 | VERIFY3S(pthread_create(&kt->t_tid, &attr, &zk_thread_helper, kt), | |
187 | ==, 0); | |
188 | ||
189 | VERIFY3S(pthread_attr_destroy(&attr), ==, 0); | |
190 | ||
191 | return kt; | |
192 | } | |
193 | ||
194 | void | |
195 | zk_thread_exit(void) | |
196 | { | |
197 | kthread_t *kt = curthread; | |
198 | ||
199 | ASSERT(pthread_equal(kt->t_tid, pthread_self())); | |
200 | ||
201 | umem_free(kt, sizeof(kthread_t)); | |
202 | ||
203 | pthread_mutex_lock(&kthread_lock); | |
204 | kthread_nr--; | |
205 | pthread_mutex_unlock(&kthread_lock); | |
206 | ||
207 | pthread_cond_broadcast(&kthread_cond); | |
208 | pthread_exit((void *)TS_MAGIC); | |
209 | } | |
210 | ||
211 | void | |
212 | zk_thread_join(kt_did_t tid) | |
213 | { | |
214 | void *ret; | |
215 | ||
216 | pthread_join((pthread_t)tid, &ret); | |
217 | VERIFY3P(ret, ==, (void *)TS_MAGIC); | |
34dc7c2f BB |
218 | } |
219 | ||
220 | /* | |
221 | * ========================================================================= | |
222 | * kstats | |
223 | * ========================================================================= | |
224 | */ | |
225 | /*ARGSUSED*/ | |
226 | kstat_t * | |
227 | kstat_create(char *module, int instance, char *name, char *class, | |
228 | uchar_t type, ulong_t ndata, uchar_t ks_flag) | |
229 | { | |
230 | return (NULL); | |
231 | } | |
232 | ||
233 | /*ARGSUSED*/ | |
234 | void | |
235 | kstat_install(kstat_t *ksp) | |
236 | {} | |
237 | ||
238 | /*ARGSUSED*/ | |
239 | void | |
240 | kstat_delete(kstat_t *ksp) | |
241 | {} | |
242 | ||
1421c891 PS |
243 | /*ARGSUSED*/ |
244 | void | |
245 | kstat_set_raw_ops(kstat_t *ksp, | |
246 | int (*headers)(char *buf, size_t size), | |
247 | int (*data)(char *buf, size_t size, void *data), | |
248 | void *(*addr)(kstat_t *ksp, loff_t index)) | |
249 | {} | |
250 | ||
34dc7c2f BB |
251 | /* |
252 | * ========================================================================= | |
253 | * mutexes | |
254 | * ========================================================================= | |
255 | */ | |
1e33ac1e | 256 | |
34dc7c2f | 257 | void |
1e33ac1e | 258 | mutex_init(kmutex_t *mp, char *name, int type, void *cookie) |
34dc7c2f | 259 | { |
1e33ac1e BB |
260 | ASSERT3S(type, ==, MUTEX_DEFAULT); |
261 | ASSERT3P(cookie, ==, NULL); | |
262 | mp->m_owner = MTX_INIT; | |
263 | mp->m_magic = MTX_MAGIC; | |
264 | VERIFY3S(pthread_mutex_init(&mp->m_lock, NULL), ==, 0); | |
34dc7c2f BB |
265 | } |
266 | ||
267 | void | |
1e33ac1e | 268 | mutex_destroy(kmutex_t *mp) |
34dc7c2f | 269 | { |
1e33ac1e BB |
270 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
271 | ASSERT3P(mp->m_owner, ==, MTX_INIT); | |
272 | VERIFY3S(pthread_mutex_destroy(&(mp)->m_lock), ==, 0); | |
273 | mp->m_owner = MTX_DEST; | |
274 | mp->m_magic = 0; | |
34dc7c2f BB |
275 | } |
276 | ||
277 | void | |
278 | mutex_enter(kmutex_t *mp) | |
279 | { | |
1e33ac1e BB |
280 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
281 | ASSERT3P(mp->m_owner, !=, MTX_DEST); | |
282 | ASSERT3P(mp->m_owner, !=, curthread); | |
283 | VERIFY3S(pthread_mutex_lock(&mp->m_lock), ==, 0); | |
284 | ASSERT3P(mp->m_owner, ==, MTX_INIT); | |
34dc7c2f BB |
285 | mp->m_owner = curthread; |
286 | } | |
287 | ||
288 | int | |
289 | mutex_tryenter(kmutex_t *mp) | |
290 | { | |
1e33ac1e BB |
291 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
292 | ASSERT3P(mp->m_owner, !=, MTX_DEST); | |
293 | if (0 == pthread_mutex_trylock(&mp->m_lock)) { | |
294 | ASSERT3P(mp->m_owner, ==, MTX_INIT); | |
34dc7c2f BB |
295 | mp->m_owner = curthread; |
296 | return (1); | |
297 | } else { | |
298 | return (0); | |
299 | } | |
300 | } | |
301 | ||
302 | void | |
303 | mutex_exit(kmutex_t *mp) | |
304 | { | |
1e33ac1e BB |
305 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
306 | ASSERT3P(mutex_owner(mp), ==, curthread); | |
307 | mp->m_owner = MTX_INIT; | |
308 | VERIFY3S(pthread_mutex_unlock(&mp->m_lock), ==, 0); | |
34dc7c2f BB |
309 | } |
310 | ||
311 | void * | |
312 | mutex_owner(kmutex_t *mp) | |
313 | { | |
1e33ac1e | 314 | ASSERT3U(mp->m_magic, ==, MTX_MAGIC); |
34dc7c2f BB |
315 | return (mp->m_owner); |
316 | } | |
317 | ||
1e33ac1e BB |
318 | int |
319 | mutex_held(kmutex_t *mp) | |
320 | { | |
321 | return (mp->m_owner == curthread); | |
322 | } | |
323 | ||
34dc7c2f BB |
324 | /* |
325 | * ========================================================================= | |
326 | * rwlocks | |
327 | * ========================================================================= | |
328 | */ | |
1e33ac1e | 329 | |
34dc7c2f BB |
330 | void |
331 | rw_init(krwlock_t *rwlp, char *name, int type, void *arg) | |
332 | { | |
1e33ac1e BB |
333 | ASSERT3S(type, ==, RW_DEFAULT); |
334 | ASSERT3P(arg, ==, NULL); | |
335 | VERIFY3S(pthread_rwlock_init(&rwlp->rw_lock, NULL), ==, 0); | |
336 | rwlp->rw_owner = RW_INIT; | |
337 | rwlp->rw_wr_owner = RW_INIT; | |
338 | rwlp->rw_readers = 0; | |
339 | rwlp->rw_magic = RW_MAGIC; | |
34dc7c2f BB |
340 | } |
341 | ||
342 | void | |
343 | rw_destroy(krwlock_t *rwlp) | |
344 | { | |
1e33ac1e BB |
345 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
346 | ||
347 | VERIFY3S(pthread_rwlock_destroy(&rwlp->rw_lock), ==, 0); | |
348 | rwlp->rw_magic = 0; | |
34dc7c2f BB |
349 | } |
350 | ||
351 | void | |
352 | rw_enter(krwlock_t *rwlp, krw_t rw) | |
353 | { | |
1e33ac1e BB |
354 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
355 | ASSERT3P(rwlp->rw_owner, !=, curthread); | |
356 | ASSERT3P(rwlp->rw_wr_owner, !=, curthread); | |
34dc7c2f | 357 | |
1e33ac1e BB |
358 | if (rw == RW_READER) { |
359 | VERIFY3S(pthread_rwlock_rdlock(&rwlp->rw_lock), ==, 0); | |
360 | ASSERT3P(rwlp->rw_wr_owner, ==, RW_INIT); | |
361 | ||
362 | atomic_inc_uint(&rwlp->rw_readers); | |
363 | } else { | |
364 | VERIFY3S(pthread_rwlock_wrlock(&rwlp->rw_lock), ==, 0); | |
365 | ASSERT3P(rwlp->rw_wr_owner, ==, RW_INIT); | |
366 | ASSERT3U(rwlp->rw_readers, ==, 0); | |
367 | ||
368 | rwlp->rw_wr_owner = curthread; | |
369 | } | |
34dc7c2f BB |
370 | |
371 | rwlp->rw_owner = curthread; | |
372 | } | |
373 | ||
374 | void | |
375 | rw_exit(krwlock_t *rwlp) | |
376 | { | |
1e33ac1e BB |
377 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
378 | ASSERT(RW_LOCK_HELD(rwlp)); | |
379 | ||
380 | if (RW_READ_HELD(rwlp)) | |
381 | atomic_dec_uint(&rwlp->rw_readers); | |
382 | else | |
383 | rwlp->rw_wr_owner = RW_INIT; | |
34dc7c2f | 384 | |
1e33ac1e BB |
385 | rwlp->rw_owner = RW_INIT; |
386 | VERIFY3S(pthread_rwlock_unlock(&rwlp->rw_lock), ==, 0); | |
34dc7c2f BB |
387 | } |
388 | ||
389 | int | |
390 | rw_tryenter(krwlock_t *rwlp, krw_t rw) | |
391 | { | |
392 | int rv; | |
393 | ||
1e33ac1e | 394 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
34dc7c2f BB |
395 | |
396 | if (rw == RW_READER) | |
1e33ac1e | 397 | rv = pthread_rwlock_tryrdlock(&rwlp->rw_lock); |
34dc7c2f | 398 | else |
1e33ac1e | 399 | rv = pthread_rwlock_trywrlock(&rwlp->rw_lock); |
34dc7c2f BB |
400 | |
401 | if (rv == 0) { | |
1e33ac1e BB |
402 | ASSERT3P(rwlp->rw_wr_owner, ==, RW_INIT); |
403 | ||
404 | if (rw == RW_READER) | |
405 | atomic_inc_uint(&rwlp->rw_readers); | |
406 | else { | |
407 | ASSERT3U(rwlp->rw_readers, ==, 0); | |
408 | rwlp->rw_wr_owner = curthread; | |
409 | } | |
410 | ||
34dc7c2f BB |
411 | rwlp->rw_owner = curthread; |
412 | return (1); | |
413 | } | |
414 | ||
1e33ac1e BB |
415 | VERIFY3S(rv, ==, EBUSY); |
416 | ||
34dc7c2f BB |
417 | return (0); |
418 | } | |
419 | ||
34dc7c2f BB |
420 | int |
421 | rw_tryupgrade(krwlock_t *rwlp) | |
422 | { | |
1e33ac1e | 423 | ASSERT3U(rwlp->rw_magic, ==, RW_MAGIC); |
34dc7c2f BB |
424 | |
425 | return (0); | |
426 | } | |
427 | ||
428 | /* | |
429 | * ========================================================================= | |
430 | * condition variables | |
431 | * ========================================================================= | |
432 | */ | |
1e33ac1e | 433 | |
34dc7c2f BB |
434 | void |
435 | cv_init(kcondvar_t *cv, char *name, int type, void *arg) | |
436 | { | |
1e33ac1e BB |
437 | ASSERT3S(type, ==, CV_DEFAULT); |
438 | cv->cv_magic = CV_MAGIC; | |
439 | VERIFY3S(pthread_cond_init(&cv->cv, NULL), ==, 0); | |
34dc7c2f BB |
440 | } |
441 | ||
442 | void | |
443 | cv_destroy(kcondvar_t *cv) | |
444 | { | |
1e33ac1e BB |
445 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
446 | VERIFY3S(pthread_cond_destroy(&cv->cv), ==, 0); | |
447 | cv->cv_magic = 0; | |
34dc7c2f BB |
448 | } |
449 | ||
450 | void | |
451 | cv_wait(kcondvar_t *cv, kmutex_t *mp) | |
452 | { | |
1e33ac1e BB |
453 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
454 | ASSERT3P(mutex_owner(mp), ==, curthread); | |
455 | mp->m_owner = MTX_INIT; | |
456 | int ret = pthread_cond_wait(&cv->cv, &mp->m_lock); | |
457 | if (ret != 0) | |
458 | VERIFY3S(ret, ==, EINTR); | |
34dc7c2f BB |
459 | mp->m_owner = curthread; |
460 | } | |
461 | ||
462 | clock_t | |
463 | cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime) | |
464 | { | |
465 | int error; | |
1e33ac1e | 466 | struct timeval tv; |
34dc7c2f BB |
467 | timestruc_t ts; |
468 | clock_t delta; | |
469 | ||
1e33ac1e BB |
470 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
471 | ||
34dc7c2f | 472 | top: |
428870ff | 473 | delta = abstime - ddi_get_lbolt(); |
34dc7c2f BB |
474 | if (delta <= 0) |
475 | return (-1); | |
476 | ||
1e33ac1e BB |
477 | VERIFY(gettimeofday(&tv, NULL) == 0); |
478 | ||
479 | ts.tv_sec = tv.tv_sec + delta / hz; | |
480 | ts.tv_nsec = tv.tv_usec * 1000 + (delta % hz) * (NANOSEC / hz); | |
481 | if (ts.tv_nsec >= NANOSEC) { | |
482 | ts.tv_sec++; | |
483 | ts.tv_nsec -= NANOSEC; | |
484 | } | |
34dc7c2f | 485 | |
1e33ac1e BB |
486 | ASSERT3P(mutex_owner(mp), ==, curthread); |
487 | mp->m_owner = MTX_INIT; | |
488 | error = pthread_cond_timedwait(&cv->cv, &mp->m_lock, &ts); | |
34dc7c2f BB |
489 | mp->m_owner = curthread; |
490 | ||
1e33ac1e | 491 | if (error == ETIMEDOUT) |
34dc7c2f BB |
492 | return (-1); |
493 | ||
494 | if (error == EINTR) | |
495 | goto top; | |
496 | ||
1e33ac1e | 497 | VERIFY3S(error, ==, 0); |
34dc7c2f BB |
498 | |
499 | return (1); | |
500 | } | |
501 | ||
502 | void | |
503 | cv_signal(kcondvar_t *cv) | |
504 | { | |
1e33ac1e BB |
505 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
506 | VERIFY3S(pthread_cond_signal(&cv->cv), ==, 0); | |
34dc7c2f BB |
507 | } |
508 | ||
509 | void | |
510 | cv_broadcast(kcondvar_t *cv) | |
511 | { | |
1e33ac1e BB |
512 | ASSERT3U(cv->cv_magic, ==, CV_MAGIC); |
513 | VERIFY3S(pthread_cond_broadcast(&cv->cv), ==, 0); | |
34dc7c2f BB |
514 | } |
515 | ||
516 | /* | |
517 | * ========================================================================= | |
518 | * vnode operations | |
519 | * ========================================================================= | |
520 | */ | |
521 | /* | |
522 | * Note: for the xxxat() versions of these functions, we assume that the | |
523 | * starting vp is always rootdir (which is true for spa_directory.c, the only | |
524 | * ZFS consumer of these interfaces). We assert this is true, and then emulate | |
525 | * them by adding '/' in front of the path. | |
526 | */ | |
527 | ||
528 | /*ARGSUSED*/ | |
529 | int | |
530 | vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3) | |
531 | { | |
532 | int fd; | |
533 | vnode_t *vp; | |
a4914d38 | 534 | int old_umask = 0; |
5ae4e2c2 | 535 | char *realpath; |
34dc7c2f | 536 | struct stat64 st; |
4d58b69d | 537 | int err; |
34dc7c2f | 538 | |
5ae4e2c2 BB |
539 | realpath = umem_alloc(MAXPATHLEN, UMEM_NOFAIL); |
540 | ||
34dc7c2f BB |
541 | /* |
542 | * If we're accessing a real disk from userland, we need to use | |
543 | * the character interface to avoid caching. This is particularly | |
544 | * important if we're trying to look at a real in-kernel storage | |
545 | * pool from userland, e.g. via zdb, because otherwise we won't | |
546 | * see the changes occurring under the segmap cache. | |
547 | * On the other hand, the stupid character device returns zero | |
548 | * for its size. So -- gag -- we open the block device to get | |
549 | * its size, and remember it for subsequent VOP_GETATTR(). | |
550 | */ | |
d603ed6c | 551 | #if defined(__sun__) || defined(__sun) |
34dc7c2f | 552 | if (strncmp(path, "/dev/", 5) == 0) { |
d603ed6c BB |
553 | #else |
554 | if (0) { | |
555 | #endif | |
34dc7c2f BB |
556 | char *dsk; |
557 | fd = open64(path, O_RDONLY); | |
5ae4e2c2 BB |
558 | if (fd == -1) { |
559 | err = errno; | |
560 | free(realpath); | |
561 | return (err); | |
562 | } | |
34dc7c2f | 563 | if (fstat64(fd, &st) == -1) { |
5ae4e2c2 | 564 | err = errno; |
34dc7c2f | 565 | close(fd); |
5ae4e2c2 BB |
566 | free(realpath); |
567 | return (err); | |
34dc7c2f BB |
568 | } |
569 | close(fd); | |
570 | (void) sprintf(realpath, "%s", path); | |
571 | dsk = strstr(path, "/dsk/"); | |
572 | if (dsk != NULL) | |
573 | (void) sprintf(realpath + (dsk - path) + 1, "r%s", | |
574 | dsk + 1); | |
575 | } else { | |
576 | (void) sprintf(realpath, "%s", path); | |
5ae4e2c2 BB |
577 | if (!(flags & FCREAT) && stat64(realpath, &st) == -1) { |
578 | err = errno; | |
579 | free(realpath); | |
580 | return (err); | |
581 | } | |
34dc7c2f BB |
582 | } |
583 | ||
d603ed6c BB |
584 | if (!(flags & FCREAT) && S_ISBLK(st.st_mode)) { |
585 | #ifdef __linux__ | |
586 | flags |= O_DIRECT; | |
587 | #endif | |
588 | /* We shouldn't be writing to block devices in userspace */ | |
589 | VERIFY(!(flags & FWRITE)); | |
590 | } | |
591 | ||
34dc7c2f BB |
592 | if (flags & FCREAT) |
593 | old_umask = umask(0); | |
594 | ||
595 | /* | |
596 | * The construct 'flags - FREAD' conveniently maps combinations of | |
597 | * FREAD and FWRITE to the corresponding O_RDONLY, O_WRONLY, and O_RDWR. | |
598 | */ | |
599 | fd = open64(realpath, flags - FREAD, mode); | |
5ae4e2c2 | 600 | free(realpath); |
34dc7c2f BB |
601 | |
602 | if (flags & FCREAT) | |
603 | (void) umask(old_umask); | |
604 | ||
605 | if (fd == -1) | |
606 | return (errno); | |
607 | ||
8d4e8140 | 608 | if (fstat64_blk(fd, &st) == -1) { |
4d58b69d | 609 | err = errno; |
34dc7c2f | 610 | close(fd); |
4d58b69d | 611 | return (err); |
34dc7c2f BB |
612 | } |
613 | ||
614 | (void) fcntl(fd, F_SETFD, FD_CLOEXEC); | |
615 | ||
616 | *vpp = vp = umem_zalloc(sizeof (vnode_t), UMEM_NOFAIL); | |
617 | ||
618 | vp->v_fd = fd; | |
619 | vp->v_size = st.st_size; | |
620 | vp->v_path = spa_strdup(path); | |
621 | ||
622 | return (0); | |
623 | } | |
624 | ||
625 | /*ARGSUSED*/ | |
626 | int | |
627 | vn_openat(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, | |
628 | int x3, vnode_t *startvp, int fd) | |
629 | { | |
630 | char *realpath = umem_alloc(strlen(path) + 2, UMEM_NOFAIL); | |
631 | int ret; | |
632 | ||
633 | ASSERT(startvp == rootdir); | |
634 | (void) sprintf(realpath, "/%s", path); | |
635 | ||
636 | /* fd ignored for now, need if want to simulate nbmand support */ | |
637 | ret = vn_open(realpath, x1, flags, mode, vpp, x2, x3); | |
638 | ||
639 | umem_free(realpath, strlen(path) + 2); | |
640 | ||
641 | return (ret); | |
642 | } | |
643 | ||
644 | /*ARGSUSED*/ | |
645 | int | |
646 | vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset, | |
647 | int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp) | |
648 | { | |
4d58b69d | 649 | ssize_t rc, done = 0, split; |
34dc7c2f BB |
650 | |
651 | if (uio == UIO_READ) { | |
4d58b69d | 652 | rc = pread64(vp->v_fd, addr, len, offset); |
34dc7c2f BB |
653 | } else { |
654 | /* | |
655 | * To simulate partial disk writes, we split writes into two | |
656 | * system calls so that the process can be killed in between. | |
657 | */ | |
9ae529ec CS |
658 | int sectors = len >> SPA_MINBLOCKSHIFT; |
659 | split = (sectors > 0 ? rand() % sectors : 0) << | |
660 | SPA_MINBLOCKSHIFT; | |
4d58b69d RC |
661 | rc = pwrite64(vp->v_fd, addr, split, offset); |
662 | if (rc != -1) { | |
663 | done = rc; | |
664 | rc = pwrite64(vp->v_fd, (char *)addr + split, | |
665 | len - split, offset + split); | |
666 | } | |
34dc7c2f BB |
667 | } |
668 | ||
d603ed6c BB |
669 | #ifdef __linux__ |
670 | if (rc == -1 && errno == EINVAL) { | |
671 | /* | |
672 | * Under Linux, this most likely means an alignment issue | |
673 | * (memory or disk) due to O_DIRECT, so we abort() in order to | |
674 | * catch the offender. | |
675 | */ | |
676 | abort(); | |
677 | } | |
678 | #endif | |
4d58b69d | 679 | if (rc == -1) |
34dc7c2f | 680 | return (errno); |
4d58b69d RC |
681 | |
682 | done += rc; | |
683 | ||
34dc7c2f | 684 | if (residp) |
4d58b69d RC |
685 | *residp = len - done; |
686 | else if (done != len) | |
34dc7c2f BB |
687 | return (EIO); |
688 | return (0); | |
689 | } | |
690 | ||
691 | void | |
692 | vn_close(vnode_t *vp) | |
693 | { | |
694 | close(vp->v_fd); | |
695 | spa_strfree(vp->v_path); | |
696 | umem_free(vp, sizeof (vnode_t)); | |
697 | } | |
698 | ||
428870ff BB |
699 | /* |
700 | * At a minimum we need to update the size since vdev_reopen() | |
701 | * will no longer call vn_openat(). | |
702 | */ | |
703 | int | |
704 | fop_getattr(vnode_t *vp, vattr_t *vap) | |
705 | { | |
706 | struct stat64 st; | |
8d4e8140 | 707 | int err; |
428870ff | 708 | |
8d4e8140 RC |
709 | if (fstat64_blk(vp->v_fd, &st) == -1) { |
710 | err = errno; | |
428870ff | 711 | close(vp->v_fd); |
8d4e8140 | 712 | return (err); |
428870ff BB |
713 | } |
714 | ||
715 | vap->va_size = st.st_size; | |
716 | return (0); | |
717 | } | |
718 | ||
34dc7c2f BB |
719 | /* |
720 | * ========================================================================= | |
721 | * Figure out which debugging statements to print | |
722 | * ========================================================================= | |
723 | */ | |
724 | ||
725 | static char *dprintf_string; | |
726 | static int dprintf_print_all; | |
727 | ||
728 | int | |
729 | dprintf_find_string(const char *string) | |
730 | { | |
731 | char *tmp_str = dprintf_string; | |
732 | int len = strlen(string); | |
733 | ||
734 | /* | |
735 | * Find out if this is a string we want to print. | |
736 | * String format: file1.c,function_name1,file2.c,file3.c | |
737 | */ | |
738 | ||
739 | while (tmp_str != NULL) { | |
740 | if (strncmp(tmp_str, string, len) == 0 && | |
741 | (tmp_str[len] == ',' || tmp_str[len] == '\0')) | |
742 | return (1); | |
743 | tmp_str = strchr(tmp_str, ','); | |
744 | if (tmp_str != NULL) | |
745 | tmp_str++; /* Get rid of , */ | |
746 | } | |
747 | return (0); | |
748 | } | |
749 | ||
750 | void | |
751 | dprintf_setup(int *argc, char **argv) | |
752 | { | |
753 | int i, j; | |
754 | ||
755 | /* | |
756 | * Debugging can be specified two ways: by setting the | |
757 | * environment variable ZFS_DEBUG, or by including a | |
758 | * "debug=..." argument on the command line. The command | |
759 | * line setting overrides the environment variable. | |
760 | */ | |
761 | ||
762 | for (i = 1; i < *argc; i++) { | |
763 | int len = strlen("debug="); | |
764 | /* First look for a command line argument */ | |
765 | if (strncmp("debug=", argv[i], len) == 0) { | |
766 | dprintf_string = argv[i] + len; | |
767 | /* Remove from args */ | |
768 | for (j = i; j < *argc; j++) | |
769 | argv[j] = argv[j+1]; | |
770 | argv[j] = NULL; | |
771 | (*argc)--; | |
772 | } | |
773 | } | |
774 | ||
775 | if (dprintf_string == NULL) { | |
776 | /* Look for ZFS_DEBUG environment variable */ | |
777 | dprintf_string = getenv("ZFS_DEBUG"); | |
778 | } | |
779 | ||
780 | /* | |
781 | * Are we just turning on all debugging? | |
782 | */ | |
783 | if (dprintf_find_string("on")) | |
784 | dprintf_print_all = 1; | |
785 | } | |
786 | ||
787 | /* | |
788 | * ========================================================================= | |
789 | * debug printfs | |
790 | * ========================================================================= | |
791 | */ | |
792 | void | |
793 | __dprintf(const char *file, const char *func, int line, const char *fmt, ...) | |
794 | { | |
795 | const char *newfile; | |
796 | va_list adx; | |
797 | ||
798 | /* | |
799 | * Get rid of annoying "../common/" prefix to filename. | |
800 | */ | |
801 | newfile = strrchr(file, '/'); | |
802 | if (newfile != NULL) { | |
803 | newfile = newfile + 1; /* Get rid of leading / */ | |
804 | } else { | |
805 | newfile = file; | |
806 | } | |
807 | ||
808 | if (dprintf_print_all || | |
809 | dprintf_find_string(newfile) || | |
810 | dprintf_find_string(func)) { | |
811 | /* Print out just the function name if requested */ | |
812 | flockfile(stdout); | |
813 | if (dprintf_find_string("pid")) | |
814 | (void) printf("%d ", getpid()); | |
815 | if (dprintf_find_string("tid")) | |
1e33ac1e | 816 | (void) printf("%u ", (uint_t) pthread_self()); |
34dc7c2f BB |
817 | if (dprintf_find_string("cpu")) |
818 | (void) printf("%u ", getcpuid()); | |
819 | if (dprintf_find_string("time")) | |
820 | (void) printf("%llu ", gethrtime()); | |
821 | if (dprintf_find_string("long")) | |
822 | (void) printf("%s, line %d: ", newfile, line); | |
823 | (void) printf("%s: ", func); | |
824 | va_start(adx, fmt); | |
825 | (void) vprintf(fmt, adx); | |
826 | va_end(adx); | |
827 | funlockfile(stdout); | |
828 | } | |
829 | } | |
830 | ||
34dc7c2f BB |
831 | /* |
832 | * ========================================================================= | |
833 | * cmn_err() and panic() | |
834 | * ========================================================================= | |
835 | */ | |
836 | static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; | |
837 | static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; | |
838 | ||
839 | void | |
840 | vpanic(const char *fmt, va_list adx) | |
841 | { | |
842 | (void) fprintf(stderr, "error: "); | |
843 | (void) vfprintf(stderr, fmt, adx); | |
844 | (void) fprintf(stderr, "\n"); | |
845 | ||
846 | abort(); /* think of it as a "user-level crash dump" */ | |
847 | } | |
848 | ||
849 | void | |
850 | panic(const char *fmt, ...) | |
851 | { | |
852 | va_list adx; | |
853 | ||
854 | va_start(adx, fmt); | |
855 | vpanic(fmt, adx); | |
856 | va_end(adx); | |
857 | } | |
858 | ||
859 | void | |
860 | vcmn_err(int ce, const char *fmt, va_list adx) | |
861 | { | |
862 | if (ce == CE_PANIC) | |
863 | vpanic(fmt, adx); | |
864 | if (ce != CE_NOTE) { /* suppress noise in userland stress testing */ | |
865 | (void) fprintf(stderr, "%s", ce_prefix[ce]); | |
866 | (void) vfprintf(stderr, fmt, adx); | |
867 | (void) fprintf(stderr, "%s", ce_suffix[ce]); | |
868 | } | |
869 | } | |
870 | ||
871 | /*PRINTFLIKE2*/ | |
872 | void | |
873 | cmn_err(int ce, const char *fmt, ...) | |
874 | { | |
875 | va_list adx; | |
876 | ||
877 | va_start(adx, fmt); | |
878 | vcmn_err(ce, fmt, adx); | |
879 | va_end(adx); | |
880 | } | |
881 | ||
882 | /* | |
883 | * ========================================================================= | |
884 | * kobj interfaces | |
885 | * ========================================================================= | |
886 | */ | |
887 | struct _buf * | |
888 | kobj_open_file(char *name) | |
889 | { | |
890 | struct _buf *file; | |
891 | vnode_t *vp; | |
892 | ||
893 | /* set vp as the _fd field of the file */ | |
894 | if (vn_openat(name, UIO_SYSSPACE, FREAD, 0, &vp, 0, 0, rootdir, | |
895 | -1) != 0) | |
896 | return ((void *)-1UL); | |
897 | ||
898 | file = umem_zalloc(sizeof (struct _buf), UMEM_NOFAIL); | |
899 | file->_fd = (intptr_t)vp; | |
900 | return (file); | |
901 | } | |
902 | ||
903 | int | |
904 | kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off) | |
905 | { | |
906 | ssize_t resid; | |
907 | ||
908 | vn_rdwr(UIO_READ, (vnode_t *)file->_fd, buf, size, (offset_t)off, | |
909 | UIO_SYSSPACE, 0, 0, 0, &resid); | |
910 | ||
911 | return (size - resid); | |
912 | } | |
913 | ||
914 | void | |
915 | kobj_close_file(struct _buf *file) | |
916 | { | |
917 | vn_close((vnode_t *)file->_fd); | |
918 | umem_free(file, sizeof (struct _buf)); | |
919 | } | |
920 | ||
921 | int | |
922 | kobj_get_filesize(struct _buf *file, uint64_t *size) | |
923 | { | |
924 | struct stat64 st; | |
925 | vnode_t *vp = (vnode_t *)file->_fd; | |
926 | ||
927 | if (fstat64(vp->v_fd, &st) == -1) { | |
928 | vn_close(vp); | |
929 | return (errno); | |
930 | } | |
931 | *size = st.st_size; | |
932 | return (0); | |
933 | } | |
934 | ||
935 | /* | |
936 | * ========================================================================= | |
937 | * misc routines | |
938 | * ========================================================================= | |
939 | */ | |
940 | ||
941 | void | |
942 | delay(clock_t ticks) | |
943 | { | |
944 | poll(0, 0, ticks * (1000 / hz)); | |
945 | } | |
946 | ||
947 | /* | |
948 | * Find highest one bit set. | |
949 | * Returns bit number + 1 of highest bit that is set, otherwise returns 0. | |
950 | * High order bit is 31 (or 63 in _LP64 kernel). | |
951 | */ | |
952 | int | |
953 | highbit(ulong_t i) | |
954 | { | |
955 | register int h = 1; | |
956 | ||
957 | if (i == 0) | |
958 | return (0); | |
959 | #ifdef _LP64 | |
960 | if (i & 0xffffffff00000000ul) { | |
961 | h += 32; i >>= 32; | |
962 | } | |
963 | #endif | |
964 | if (i & 0xffff0000) { | |
965 | h += 16; i >>= 16; | |
966 | } | |
967 | if (i & 0xff00) { | |
968 | h += 8; i >>= 8; | |
969 | } | |
970 | if (i & 0xf0) { | |
971 | h += 4; i >>= 4; | |
972 | } | |
973 | if (i & 0xc) { | |
974 | h += 2; i >>= 2; | |
975 | } | |
976 | if (i & 0x2) { | |
977 | h += 1; | |
978 | } | |
979 | return (h); | |
980 | } | |
981 | ||
982 | static int random_fd = -1, urandom_fd = -1; | |
983 | ||
984 | static int | |
985 | random_get_bytes_common(uint8_t *ptr, size_t len, int fd) | |
986 | { | |
987 | size_t resid = len; | |
988 | ssize_t bytes; | |
989 | ||
990 | ASSERT(fd != -1); | |
991 | ||
992 | while (resid != 0) { | |
993 | bytes = read(fd, ptr, resid); | |
994 | ASSERT3S(bytes, >=, 0); | |
995 | ptr += bytes; | |
996 | resid -= bytes; | |
997 | } | |
998 | ||
999 | return (0); | |
1000 | } | |
1001 | ||
1002 | int | |
1003 | random_get_bytes(uint8_t *ptr, size_t len) | |
1004 | { | |
1005 | return (random_get_bytes_common(ptr, len, random_fd)); | |
1006 | } | |
1007 | ||
1008 | int | |
1009 | random_get_pseudo_bytes(uint8_t *ptr, size_t len) | |
1010 | { | |
1011 | return (random_get_bytes_common(ptr, len, urandom_fd)); | |
1012 | } | |
1013 | ||
1014 | int | |
1015 | ddi_strtoul(const char *hw_serial, char **nptr, int base, unsigned long *result) | |
1016 | { | |
1017 | char *end; | |
1018 | ||
1019 | *result = strtoul(hw_serial, &end, base); | |
1020 | if (*result == 0) | |
1021 | return (errno); | |
1022 | return (0); | |
1023 | } | |
1024 | ||
428870ff BB |
1025 | int |
1026 | ddi_strtoull(const char *str, char **nptr, int base, u_longlong_t *result) | |
1027 | { | |
1028 | char *end; | |
1029 | ||
1030 | *result = strtoull(str, &end, base); | |
1031 | if (*result == 0) | |
1032 | return (errno); | |
1033 | return (0); | |
1034 | } | |
1035 | ||
34dc7c2f BB |
1036 | /* |
1037 | * ========================================================================= | |
1038 | * kernel emulation setup & teardown | |
1039 | * ========================================================================= | |
1040 | */ | |
1041 | static int | |
1042 | umem_out_of_memory(void) | |
1043 | { | |
1044 | char errmsg[] = "out of memory -- generating core dump\n"; | |
1045 | ||
0e5b68e0 | 1046 | (void) fprintf(stderr, "%s", errmsg); |
34dc7c2f BB |
1047 | abort(); |
1048 | return (0); | |
1049 | } | |
1050 | ||
1051 | void | |
1052 | kernel_init(int mode) | |
1053 | { | |
13fe0198 MA |
1054 | extern uint_t rrw_tsd_key; |
1055 | ||
34dc7c2f BB |
1056 | umem_nofail_callback(umem_out_of_memory); |
1057 | ||
1058 | physmem = sysconf(_SC_PHYS_PAGES); | |
1059 | ||
1060 | dprintf("physmem = %llu pages (%.2f GB)\n", physmem, | |
1061 | (double)physmem * sysconf(_SC_PAGE_SIZE) / (1ULL << 30)); | |
1062 | ||
428870ff BB |
1063 | (void) snprintf(hw_serial, sizeof (hw_serial), "%ld", |
1064 | (mode & FWRITE) ? gethostid() : 0); | |
34dc7c2f BB |
1065 | |
1066 | VERIFY((random_fd = open("/dev/random", O_RDONLY)) != -1); | |
1067 | VERIFY((urandom_fd = open("/dev/urandom", O_RDONLY)) != -1); | |
1068 | ||
1e33ac1e | 1069 | thread_init(); |
b128c09f BB |
1070 | system_taskq_init(); |
1071 | ||
34dc7c2f | 1072 | spa_init(mode); |
13fe0198 MA |
1073 | |
1074 | tsd_create(&rrw_tsd_key, rrw_tsd_destroy); | |
34dc7c2f BB |
1075 | } |
1076 | ||
1077 | void | |
1078 | kernel_fini(void) | |
1079 | { | |
1080 | spa_fini(); | |
1081 | ||
428870ff | 1082 | system_taskq_fini(); |
1e33ac1e | 1083 | thread_fini(); |
428870ff | 1084 | |
34dc7c2f BB |
1085 | close(random_fd); |
1086 | close(urandom_fd); | |
1087 | ||
1088 | random_fd = -1; | |
1089 | urandom_fd = -1; | |
1090 | } | |
1091 | ||
34dc7c2f BB |
1092 | uid_t |
1093 | crgetuid(cred_t *cr) | |
1094 | { | |
1095 | return (0); | |
1096 | } | |
1097 | ||
6f1ffb06 MA |
1098 | uid_t |
1099 | crgetruid(cred_t *cr) | |
1100 | { | |
1101 | return (0); | |
1102 | } | |
1103 | ||
34dc7c2f BB |
1104 | gid_t |
1105 | crgetgid(cred_t *cr) | |
1106 | { | |
1107 | return (0); | |
1108 | } | |
1109 | ||
1110 | int | |
1111 | crgetngroups(cred_t *cr) | |
1112 | { | |
1113 | return (0); | |
1114 | } | |
1115 | ||
1116 | gid_t * | |
1117 | crgetgroups(cred_t *cr) | |
1118 | { | |
1119 | return (NULL); | |
1120 | } | |
1121 | ||
1122 | int | |
1123 | zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) | |
1124 | { | |
1125 | return (0); | |
1126 | } | |
1127 | ||
1128 | int | |
1129 | zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) | |
1130 | { | |
1131 | return (0); | |
1132 | } | |
1133 | ||
1134 | int | |
1135 | zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) | |
1136 | { | |
1137 | return (0); | |
1138 | } | |
1139 | ||
1140 | ksiddomain_t * | |
1141 | ksid_lookupdomain(const char *dom) | |
1142 | { | |
1143 | ksiddomain_t *kd; | |
1144 | ||
1145 | kd = umem_zalloc(sizeof (ksiddomain_t), UMEM_NOFAIL); | |
1146 | kd->kd_name = spa_strdup(dom); | |
1147 | return (kd); | |
1148 | } | |
1149 | ||
1150 | void | |
1151 | ksiddomain_rele(ksiddomain_t *ksid) | |
1152 | { | |
1153 | spa_strfree(ksid->kd_name); | |
1154 | umem_free(ksid, sizeof (ksiddomain_t)); | |
1155 | } | |
428870ff | 1156 | |
428870ff | 1157 | char * |
00b46022 | 1158 | kmem_vasprintf(const char *fmt, va_list adx) |
428870ff | 1159 | { |
00b46022 BB |
1160 | char *buf = NULL; |
1161 | va_list adx_copy; | |
428870ff | 1162 | |
00b46022 BB |
1163 | va_copy(adx_copy, adx); |
1164 | VERIFY(vasprintf(&buf, fmt, adx_copy) != -1); | |
1165 | va_end(adx_copy); | |
428870ff | 1166 | |
00b46022 BB |
1167 | return (buf); |
1168 | } | |
1169 | ||
1170 | char * | |
1171 | kmem_asprintf(const char *fmt, ...) | |
1172 | { | |
1173 | char *buf = NULL; | |
1174 | va_list adx; | |
428870ff BB |
1175 | |
1176 | va_start(adx, fmt); | |
00b46022 | 1177 | VERIFY(vasprintf(&buf, fmt, adx) != -1); |
428870ff BB |
1178 | va_end(adx); |
1179 | ||
1180 | return (buf); | |
1181 | } | |
572e2857 BB |
1182 | |
1183 | /* ARGSUSED */ | |
1184 | int | |
1185 | zfs_onexit_fd_hold(int fd, minor_t *minorp) | |
1186 | { | |
1187 | *minorp = 0; | |
1188 | return (0); | |
1189 | } | |
1190 | ||
1191 | /* ARGSUSED */ | |
1192 | void | |
1193 | zfs_onexit_fd_rele(int fd) | |
1194 | { | |
1195 | } | |
1196 | ||
1197 | /* ARGSUSED */ | |
1198 | int | |
1199 | zfs_onexit_add_cb(minor_t minor, void (*func)(void *), void *data, | |
1200 | uint64_t *action_handle) | |
1201 | { | |
1202 | return (0); | |
1203 | } | |
1204 | ||
1205 | /* ARGSUSED */ | |
1206 | int | |
1207 | zfs_onexit_del_cb(minor_t minor, uint64_t action_handle, boolean_t fire) | |
1208 | { | |
1209 | return (0); | |
1210 | } | |
1211 | ||
1212 | /* ARGSUSED */ | |
1213 | int | |
1214 | zfs_onexit_cb_data(minor_t minor, uint64_t action_handle, void **data) | |
1215 | { | |
1216 | return (0); | |
1217 | } |