1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22c99e4bdcSChris Kirby * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23*94dd93aeSGeorge Wilson * Copyright (c) 2012 by Delphix. All rights reserved. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #include <assert.h> 27c9431fa1Sahl #include <fcntl.h> 28fa9e4066Sahrens #include <poll.h> 29fa9e4066Sahrens #include <stdio.h> 30fa9e4066Sahrens #include <stdlib.h> 31c9431fa1Sahl #include <string.h> 32c9431fa1Sahl #include <zlib.h> 33fa9e4066Sahrens #include <sys/spa.h> 34c9431fa1Sahl #include <sys/stat.h> 35fa9e4066Sahrens #include <sys/processor.h> 36c9431fa1Sahl #include <sys/zfs_context.h> 37c9431fa1Sahl #include <sys/zmod.h> 3895173954Sek #include <sys/utsname.h> 395679c89fSjv #include <sys/systeminfo.h> 405ad82045Snd 41fa9e4066Sahrens /* 42fa9e4066Sahrens * Emulation of kernel services in userland. 43fa9e4066Sahrens */ 44fa9e4066Sahrens 45feef89cfSVictor Latushkin int aok; 46fa9e4066Sahrens uint64_t physmem; 47fa9e4066Sahrens vnode_t *rootdir = (vnode_t *)0xabcd1234; 485679c89fSjv char hw_serial[HW_HOSTID_LEN]; 49*94dd93aeSGeorge Wilson vmem_t *zio_arena = NULL; 5095173954Sek 5195173954Sek struct utsname utsname = { 5295173954Sek "userland", "libzpool", "1", "1", "na" 5395173954Sek }; 54fa9e4066Sahrens 5535a5a358SJonathan Adams /* this only exists to have its address taken */ 5635a5a358SJonathan Adams struct proc p0; 5735a5a358SJonathan Adams 58fa9e4066Sahrens /* 59fa9e4066Sahrens * ========================================================================= 60fa9e4066Sahrens * threads 61fa9e4066Sahrens * ========================================================================= 62fa9e4066Sahrens */ 63fa9e4066Sahrens /*ARGSUSED*/ 64fa9e4066Sahrens kthread_t * 65fa9e4066Sahrens zk_thread_create(void (*func)(), void *arg) 66fa9e4066Sahrens { 67fa9e4066Sahrens thread_t tid; 68fa9e4066Sahrens 69fa9e4066Sahrens VERIFY(thr_create(0, 0, (void *(*)(void *))func, arg, THR_DETACHED, 70fa9e4066Sahrens &tid) == 0); 71fa9e4066Sahrens 72fa9e4066Sahrens return ((void *)(uintptr_t)tid); 73fa9e4066Sahrens } 74fa9e4066Sahrens 7544cb6abcSbmc /* 7644cb6abcSbmc * ========================================================================= 7744cb6abcSbmc * kstats 7844cb6abcSbmc * ========================================================================= 7944cb6abcSbmc */ 8044cb6abcSbmc /*ARGSUSED*/ 8144cb6abcSbmc kstat_t * 8244cb6abcSbmc kstat_create(char *module, int instance, char *name, char *class, 8344cb6abcSbmc uchar_t type, ulong_t ndata, uchar_t ks_flag) 8444cb6abcSbmc { 8544cb6abcSbmc return (NULL); 8644cb6abcSbmc } 8744cb6abcSbmc 8844cb6abcSbmc /*ARGSUSED*/ 8944cb6abcSbmc void 9044cb6abcSbmc kstat_install(kstat_t *ksp) 9144cb6abcSbmc {} 9244cb6abcSbmc 9344cb6abcSbmc /*ARGSUSED*/ 9444cb6abcSbmc void 9544cb6abcSbmc kstat_delete(kstat_t *ksp) 9644cb6abcSbmc {} 9744cb6abcSbmc 98fa9e4066Sahrens /* 99fa9e4066Sahrens * ========================================================================= 100fa9e4066Sahrens * mutexes 101fa9e4066Sahrens * ========================================================================= 102fa9e4066Sahrens */ 103fa9e4066Sahrens void 104fa9e4066Sahrens zmutex_init(kmutex_t *mp) 105fa9e4066Sahrens { 106fa9e4066Sahrens mp->m_owner = NULL; 107c25056deSgw mp->initialized = B_TRUE; 108fa9e4066Sahrens (void) _mutex_init(&mp->m_lock, USYNC_THREAD, NULL); 109fa9e4066Sahrens } 110fa9e4066Sahrens 111fa9e4066Sahrens void 112fa9e4066Sahrens zmutex_destroy(kmutex_t *mp) 113fa9e4066Sahrens { 114c25056deSgw ASSERT(mp->initialized == B_TRUE); 115fa9e4066Sahrens ASSERT(mp->m_owner == NULL); 116fa9e4066Sahrens (void) _mutex_destroy(&(mp)->m_lock); 117fa9e4066Sahrens mp->m_owner = (void *)-1UL; 118c25056deSgw mp->initialized = B_FALSE; 119fa9e4066Sahrens } 120fa9e4066Sahrens 121fa9e4066Sahrens void 122fa9e4066Sahrens mutex_enter(kmutex_t *mp) 123fa9e4066Sahrens { 124c25056deSgw ASSERT(mp->initialized == B_TRUE); 125fa9e4066Sahrens ASSERT(mp->m_owner != (void *)-1UL); 126fa9e4066Sahrens ASSERT(mp->m_owner != curthread); 1275ad82045Snd VERIFY(mutex_lock(&mp->m_lock) == 0); 128fa9e4066Sahrens ASSERT(mp->m_owner == NULL); 129fa9e4066Sahrens mp->m_owner = curthread; 130fa9e4066Sahrens } 131fa9e4066Sahrens 132fa9e4066Sahrens int 133fa9e4066Sahrens mutex_tryenter(kmutex_t *mp) 134fa9e4066Sahrens { 135c25056deSgw ASSERT(mp->initialized == B_TRUE); 136fa9e4066Sahrens ASSERT(mp->m_owner != (void *)-1UL); 137fa9e4066Sahrens if (0 == mutex_trylock(&mp->m_lock)) { 138fa9e4066Sahrens ASSERT(mp->m_owner == NULL); 139fa9e4066Sahrens mp->m_owner = curthread; 140fa9e4066Sahrens return (1); 141fa9e4066Sahrens } else { 142fa9e4066Sahrens return (0); 143fa9e4066Sahrens } 144fa9e4066Sahrens } 145fa9e4066Sahrens 146fa9e4066Sahrens void 147fa9e4066Sahrens mutex_exit(kmutex_t *mp) 148fa9e4066Sahrens { 149c25056deSgw ASSERT(mp->initialized == B_TRUE); 150fa9e4066Sahrens ASSERT(mutex_owner(mp) == curthread); 151fa9e4066Sahrens mp->m_owner = NULL; 1525ad82045Snd VERIFY(mutex_unlock(&mp->m_lock) == 0); 153fa9e4066Sahrens } 154fa9e4066Sahrens 155fa9e4066Sahrens void * 156fa9e4066Sahrens mutex_owner(kmutex_t *mp) 157fa9e4066Sahrens { 158c25056deSgw ASSERT(mp->initialized == B_TRUE); 159fa9e4066Sahrens return (mp->m_owner); 160fa9e4066Sahrens } 161fa9e4066Sahrens 162fa9e4066Sahrens /* 163fa9e4066Sahrens * ========================================================================= 164fa9e4066Sahrens * rwlocks 165fa9e4066Sahrens * ========================================================================= 166fa9e4066Sahrens */ 167fa9e4066Sahrens /*ARGSUSED*/ 168fa9e4066Sahrens void 169fa9e4066Sahrens rw_init(krwlock_t *rwlp, char *name, int type, void *arg) 170fa9e4066Sahrens { 171fa9e4066Sahrens rwlock_init(&rwlp->rw_lock, USYNC_THREAD, NULL); 172fa9e4066Sahrens rwlp->rw_owner = NULL; 173c25056deSgw rwlp->initialized = B_TRUE; 174fa9e4066Sahrens } 175fa9e4066Sahrens 176fa9e4066Sahrens void 177fa9e4066Sahrens rw_destroy(krwlock_t *rwlp) 178fa9e4066Sahrens { 179fa9e4066Sahrens rwlock_destroy(&rwlp->rw_lock); 180fa9e4066Sahrens rwlp->rw_owner = (void *)-1UL; 181c25056deSgw rwlp->initialized = B_FALSE; 182fa9e4066Sahrens } 183fa9e4066Sahrens 184fa9e4066Sahrens void 185fa9e4066Sahrens rw_enter(krwlock_t *rwlp, krw_t rw) 186fa9e4066Sahrens { 187fa9e4066Sahrens ASSERT(!RW_LOCK_HELD(rwlp)); 188c25056deSgw ASSERT(rwlp->initialized == B_TRUE); 189fa9e4066Sahrens ASSERT(rwlp->rw_owner != (void *)-1UL); 190fa9e4066Sahrens ASSERT(rwlp->rw_owner != curthread); 191fa9e4066Sahrens 192fa9e4066Sahrens if (rw == RW_READER) 193745cd3c5Smaybee VERIFY(rw_rdlock(&rwlp->rw_lock) == 0); 194fa9e4066Sahrens else 195745cd3c5Smaybee VERIFY(rw_wrlock(&rwlp->rw_lock) == 0); 196fa9e4066Sahrens 197fa9e4066Sahrens rwlp->rw_owner = curthread; 198fa9e4066Sahrens } 199fa9e4066Sahrens 200fa9e4066Sahrens void 201fa9e4066Sahrens rw_exit(krwlock_t *rwlp) 202fa9e4066Sahrens { 203c25056deSgw ASSERT(rwlp->initialized == B_TRUE); 204fa9e4066Sahrens ASSERT(rwlp->rw_owner != (void *)-1UL); 205fa9e4066Sahrens 206fa9e4066Sahrens rwlp->rw_owner = NULL; 207745cd3c5Smaybee VERIFY(rw_unlock(&rwlp->rw_lock) == 0); 208fa9e4066Sahrens } 209fa9e4066Sahrens 210fa9e4066Sahrens int 211fa9e4066Sahrens rw_tryenter(krwlock_t *rwlp, krw_t rw) 212fa9e4066Sahrens { 213fa9e4066Sahrens int rv; 214fa9e4066Sahrens 215c25056deSgw ASSERT(rwlp->initialized == B_TRUE); 216fa9e4066Sahrens ASSERT(rwlp->rw_owner != (void *)-1UL); 217fa9e4066Sahrens 218fa9e4066Sahrens if (rw == RW_READER) 219fa9e4066Sahrens rv = rw_tryrdlock(&rwlp->rw_lock); 220fa9e4066Sahrens else 221fa9e4066Sahrens rv = rw_trywrlock(&rwlp->rw_lock); 222fa9e4066Sahrens 223fa9e4066Sahrens if (rv == 0) { 224fa9e4066Sahrens rwlp->rw_owner = curthread; 225fa9e4066Sahrens return (1); 226fa9e4066Sahrens } 227fa9e4066Sahrens 228fa9e4066Sahrens return (0); 229fa9e4066Sahrens } 230fa9e4066Sahrens 231fa9e4066Sahrens /*ARGSUSED*/ 232fa9e4066Sahrens int 233fa9e4066Sahrens rw_tryupgrade(krwlock_t *rwlp) 234fa9e4066Sahrens { 235c25056deSgw ASSERT(rwlp->initialized == B_TRUE); 236fa9e4066Sahrens ASSERT(rwlp->rw_owner != (void *)-1UL); 237fa9e4066Sahrens 238fa9e4066Sahrens return (0); 239fa9e4066Sahrens } 240fa9e4066Sahrens 241fa9e4066Sahrens /* 242fa9e4066Sahrens * ========================================================================= 243fa9e4066Sahrens * condition variables 244fa9e4066Sahrens * ========================================================================= 245fa9e4066Sahrens */ 246fa9e4066Sahrens /*ARGSUSED*/ 247fa9e4066Sahrens void 248fa9e4066Sahrens cv_init(kcondvar_t *cv, char *name, int type, void *arg) 249fa9e4066Sahrens { 2505ad82045Snd VERIFY(cond_init(cv, type, NULL) == 0); 251fa9e4066Sahrens } 252fa9e4066Sahrens 253fa9e4066Sahrens void 254fa9e4066Sahrens cv_destroy(kcondvar_t *cv) 255fa9e4066Sahrens { 2565ad82045Snd VERIFY(cond_destroy(cv) == 0); 257fa9e4066Sahrens } 258fa9e4066Sahrens 259fa9e4066Sahrens void 260fa9e4066Sahrens cv_wait(kcondvar_t *cv, kmutex_t *mp) 261fa9e4066Sahrens { 262fa9e4066Sahrens ASSERT(mutex_owner(mp) == curthread); 263fa9e4066Sahrens mp->m_owner = NULL; 2645ad82045Snd int ret = cond_wait(cv, &mp->m_lock); 2655ad82045Snd VERIFY(ret == 0 || ret == EINTR); 266fa9e4066Sahrens mp->m_owner = curthread; 267fa9e4066Sahrens } 268fa9e4066Sahrens 269fa9e4066Sahrens clock_t 270fa9e4066Sahrens cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime) 271fa9e4066Sahrens { 272fa9e4066Sahrens int error; 273fa9e4066Sahrens timestruc_t ts; 274fa9e4066Sahrens clock_t delta; 275fa9e4066Sahrens 276fa9e4066Sahrens top: 277d3d50737SRafael Vanoni delta = abstime - ddi_get_lbolt(); 278fa9e4066Sahrens if (delta <= 0) 279fa9e4066Sahrens return (-1); 280fa9e4066Sahrens 281fa9e4066Sahrens ts.tv_sec = delta / hz; 282fa9e4066Sahrens ts.tv_nsec = (delta % hz) * (NANOSEC / hz); 283fa9e4066Sahrens 284fa9e4066Sahrens ASSERT(mutex_owner(mp) == curthread); 285fa9e4066Sahrens mp->m_owner = NULL; 286fa9e4066Sahrens error = cond_reltimedwait(cv, &mp->m_lock, &ts); 287fa9e4066Sahrens mp->m_owner = curthread; 288fa9e4066Sahrens 289fa9e4066Sahrens if (error == ETIME) 290fa9e4066Sahrens return (-1); 291fa9e4066Sahrens 292fa9e4066Sahrens if (error == EINTR) 293fa9e4066Sahrens goto top; 294fa9e4066Sahrens 295fa9e4066Sahrens ASSERT(error == 0); 296fa9e4066Sahrens 297fa9e4066Sahrens return (1); 298fa9e4066Sahrens } 299fa9e4066Sahrens 300fa9e4066Sahrens void 301fa9e4066Sahrens cv_signal(kcondvar_t *cv) 302fa9e4066Sahrens { 3035ad82045Snd VERIFY(cond_signal(cv) == 0); 304fa9e4066Sahrens } 305fa9e4066Sahrens 306fa9e4066Sahrens void 307fa9e4066Sahrens cv_broadcast(kcondvar_t *cv) 308fa9e4066Sahrens { 3095ad82045Snd VERIFY(cond_broadcast(cv) == 0); 310fa9e4066Sahrens } 311fa9e4066Sahrens 312fa9e4066Sahrens /* 313fa9e4066Sahrens * ========================================================================= 314fa9e4066Sahrens * vnode operations 315fa9e4066Sahrens * ========================================================================= 316fa9e4066Sahrens */ 317fa9e4066Sahrens /* 318fa9e4066Sahrens * Note: for the xxxat() versions of these functions, we assume that the 319fa9e4066Sahrens * starting vp is always rootdir (which is true for spa_directory.c, the only 320fa9e4066Sahrens * ZFS consumer of these interfaces). We assert this is true, and then emulate 321fa9e4066Sahrens * them by adding '/' in front of the path. 322fa9e4066Sahrens */ 323fa9e4066Sahrens 324fa9e4066Sahrens /*ARGSUSED*/ 325fa9e4066Sahrens int 326fa9e4066Sahrens vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3) 327fa9e4066Sahrens { 328fa9e4066Sahrens int fd; 329fa9e4066Sahrens vnode_t *vp; 330fa9e4066Sahrens int old_umask; 331fa9e4066Sahrens char realpath[MAXPATHLEN]; 332fa9e4066Sahrens struct stat64 st; 333fa9e4066Sahrens 334fa9e4066Sahrens /* 335fa9e4066Sahrens * If we're accessing a real disk from userland, we need to use 336fa9e4066Sahrens * the character interface to avoid caching. This is particularly 337fa9e4066Sahrens * important if we're trying to look at a real in-kernel storage 338fa9e4066Sahrens * pool from userland, e.g. via zdb, because otherwise we won't 339fa9e4066Sahrens * see the changes occurring under the segmap cache. 340fa9e4066Sahrens * On the other hand, the stupid character device returns zero 341fa9e4066Sahrens * for its size. So -- gag -- we open the block device to get 342fa9e4066Sahrens * its size, and remember it for subsequent VOP_GETATTR(). 343fa9e4066Sahrens */ 344fa9e4066Sahrens if (strncmp(path, "/dev/", 5) == 0) { 345fa9e4066Sahrens char *dsk; 346fa9e4066Sahrens fd = open64(path, O_RDONLY); 347fa9e4066Sahrens if (fd == -1) 348fa9e4066Sahrens return (errno); 349fa9e4066Sahrens if (fstat64(fd, &st) == -1) { 350fa9e4066Sahrens close(fd); 351fa9e4066Sahrens return (errno); 352fa9e4066Sahrens } 353fa9e4066Sahrens close(fd); 354fa9e4066Sahrens (void) sprintf(realpath, "%s", path); 355fa9e4066Sahrens dsk = strstr(path, "/dsk/"); 356fa9e4066Sahrens if (dsk != NULL) 357fa9e4066Sahrens (void) sprintf(realpath + (dsk - path) + 1, "r%s", 358fa9e4066Sahrens dsk + 1); 359fa9e4066Sahrens } else { 360fa9e4066Sahrens (void) sprintf(realpath, "%s", path); 361fa9e4066Sahrens if (!(flags & FCREAT) && stat64(realpath, &st) == -1) 362fa9e4066Sahrens return (errno); 363fa9e4066Sahrens } 364fa9e4066Sahrens 365fa9e4066Sahrens if (flags & FCREAT) 366fa9e4066Sahrens old_umask = umask(0); 367fa9e4066Sahrens 368fa9e4066Sahrens /* 369fa9e4066Sahrens * The construct 'flags - FREAD' conveniently maps combinations of 370fa9e4066Sahrens * FREAD and FWRITE to the corresponding O_RDONLY, O_WRONLY, and O_RDWR. 371fa9e4066Sahrens */ 372fa9e4066Sahrens fd = open64(realpath, flags - FREAD, mode); 373fa9e4066Sahrens 374fa9e4066Sahrens if (flags & FCREAT) 375fa9e4066Sahrens (void) umask(old_umask); 376fa9e4066Sahrens 377fa9e4066Sahrens if (fd == -1) 378fa9e4066Sahrens return (errno); 379fa9e4066Sahrens 380fa9e4066Sahrens if (fstat64(fd, &st) == -1) { 381fa9e4066Sahrens close(fd); 382fa9e4066Sahrens return (errno); 383fa9e4066Sahrens } 384fa9e4066Sahrens 385fa9e4066Sahrens (void) fcntl(fd, F_SETFD, FD_CLOEXEC); 386fa9e4066Sahrens 387fa9e4066Sahrens *vpp = vp = umem_zalloc(sizeof (vnode_t), UMEM_NOFAIL); 388fa9e4066Sahrens 389fa9e4066Sahrens vp->v_fd = fd; 390fa9e4066Sahrens vp->v_size = st.st_size; 391fa9e4066Sahrens vp->v_path = spa_strdup(path); 392fa9e4066Sahrens 393fa9e4066Sahrens return (0); 394fa9e4066Sahrens } 395fa9e4066Sahrens 396da6c28aaSamw /*ARGSUSED*/ 397fa9e4066Sahrens int 398fa9e4066Sahrens vn_openat(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, 399da6c28aaSamw int x3, vnode_t *startvp, int fd) 400fa9e4066Sahrens { 401fa9e4066Sahrens char *realpath = umem_alloc(strlen(path) + 2, UMEM_NOFAIL); 402fa9e4066Sahrens int ret; 403fa9e4066Sahrens 404fa9e4066Sahrens ASSERT(startvp == rootdir); 405fa9e4066Sahrens (void) sprintf(realpath, "/%s", path); 406fa9e4066Sahrens 407da6c28aaSamw /* fd ignored for now, need if want to simulate nbmand support */ 408fa9e4066Sahrens ret = vn_open(realpath, x1, flags, mode, vpp, x2, x3); 409fa9e4066Sahrens 410fa9e4066Sahrens umem_free(realpath, strlen(path) + 2); 411fa9e4066Sahrens 412fa9e4066Sahrens return (ret); 413fa9e4066Sahrens } 414fa9e4066Sahrens 415fa9e4066Sahrens /*ARGSUSED*/ 416fa9e4066Sahrens int 417fa9e4066Sahrens vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset, 418fa9e4066Sahrens int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp) 419fa9e4066Sahrens { 420fa9e4066Sahrens ssize_t iolen, split; 421fa9e4066Sahrens 422fa9e4066Sahrens if (uio == UIO_READ) { 423fa9e4066Sahrens iolen = pread64(vp->v_fd, addr, len, offset); 424fa9e4066Sahrens } else { 425fa9e4066Sahrens /* 426fa9e4066Sahrens * To simulate partial disk writes, we split writes into two 427fa9e4066Sahrens * system calls so that the process can be killed in between. 428fa9e4066Sahrens */ 429fa9e4066Sahrens split = (len > 0 ? rand() % len : 0); 430fa9e4066Sahrens iolen = pwrite64(vp->v_fd, addr, split, offset); 431fa9e4066Sahrens iolen += pwrite64(vp->v_fd, (char *)addr + split, 432fa9e4066Sahrens len - split, offset + split); 433fa9e4066Sahrens } 434fa9e4066Sahrens 435fa9e4066Sahrens if (iolen == -1) 436fa9e4066Sahrens return (errno); 437fa9e4066Sahrens if (residp) 438fa9e4066Sahrens *residp = len - iolen; 439fa9e4066Sahrens else if (iolen != len) 440fa9e4066Sahrens return (EIO); 441fa9e4066Sahrens return (0); 442fa9e4066Sahrens } 443fa9e4066Sahrens 444fa9e4066Sahrens void 445fa9e4066Sahrens vn_close(vnode_t *vp) 446fa9e4066Sahrens { 447fa9e4066Sahrens close(vp->v_fd); 448fa9e4066Sahrens spa_strfree(vp->v_path); 449fa9e4066Sahrens umem_free(vp, sizeof (vnode_t)); 450fa9e4066Sahrens } 451fa9e4066Sahrens 452095bcd66SGeorge Wilson /* 453095bcd66SGeorge Wilson * At a minimum we need to update the size since vdev_reopen() 454095bcd66SGeorge Wilson * will no longer call vn_openat(). 455095bcd66SGeorge Wilson */ 456095bcd66SGeorge Wilson int 457095bcd66SGeorge Wilson fop_getattr(vnode_t *vp, vattr_t *vap) 458095bcd66SGeorge Wilson { 459095bcd66SGeorge Wilson struct stat64 st; 460095bcd66SGeorge Wilson 461095bcd66SGeorge Wilson if (fstat64(vp->v_fd, &st) == -1) { 462095bcd66SGeorge Wilson close(vp->v_fd); 463095bcd66SGeorge Wilson return (errno); 464095bcd66SGeorge Wilson } 465095bcd66SGeorge Wilson 466095bcd66SGeorge Wilson vap->va_size = st.st_size; 467095bcd66SGeorge Wilson return (0); 468095bcd66SGeorge Wilson } 469095bcd66SGeorge Wilson 470fa9e4066Sahrens #ifdef ZFS_DEBUG 471fa9e4066Sahrens 472fa9e4066Sahrens /* 473fa9e4066Sahrens * ========================================================================= 474fa9e4066Sahrens * Figure out which debugging statements to print 475fa9e4066Sahrens * ========================================================================= 476fa9e4066Sahrens */ 477fa9e4066Sahrens 478fa9e4066Sahrens static char *dprintf_string; 479fa9e4066Sahrens static int dprintf_print_all; 480fa9e4066Sahrens 481fa9e4066Sahrens int 482fa9e4066Sahrens dprintf_find_string(const char *string) 483fa9e4066Sahrens { 484fa9e4066Sahrens char *tmp_str = dprintf_string; 485fa9e4066Sahrens int len = strlen(string); 486fa9e4066Sahrens 487fa9e4066Sahrens /* 488fa9e4066Sahrens * Find out if this is a string we want to print. 489fa9e4066Sahrens * String format: file1.c,function_name1,file2.c,file3.c 490fa9e4066Sahrens */ 491fa9e4066Sahrens 492fa9e4066Sahrens while (tmp_str != NULL) { 493fa9e4066Sahrens if (strncmp(tmp_str, string, len) == 0 && 494fa9e4066Sahrens (tmp_str[len] == ',' || tmp_str[len] == '\0')) 495fa9e4066Sahrens return (1); 496fa9e4066Sahrens tmp_str = strchr(tmp_str, ','); 497fa9e4066Sahrens if (tmp_str != NULL) 498fa9e4066Sahrens tmp_str++; /* Get rid of , */ 499fa9e4066Sahrens } 500fa9e4066Sahrens return (0); 501fa9e4066Sahrens } 502fa9e4066Sahrens 503fa9e4066Sahrens void 504fa9e4066Sahrens dprintf_setup(int *argc, char **argv) 505fa9e4066Sahrens { 506fa9e4066Sahrens int i, j; 507fa9e4066Sahrens 508fa9e4066Sahrens /* 509fa9e4066Sahrens * Debugging can be specified two ways: by setting the 510fa9e4066Sahrens * environment variable ZFS_DEBUG, or by including a 511fa9e4066Sahrens * "debug=..." argument on the command line. The command 512fa9e4066Sahrens * line setting overrides the environment variable. 513fa9e4066Sahrens */ 514fa9e4066Sahrens 515fa9e4066Sahrens for (i = 1; i < *argc; i++) { 516fa9e4066Sahrens int len = strlen("debug="); 517fa9e4066Sahrens /* First look for a command line argument */ 518fa9e4066Sahrens if (strncmp("debug=", argv[i], len) == 0) { 519fa9e4066Sahrens dprintf_string = argv[i] + len; 520fa9e4066Sahrens /* Remove from args */ 521fa9e4066Sahrens for (j = i; j < *argc; j++) 522fa9e4066Sahrens argv[j] = argv[j+1]; 523fa9e4066Sahrens argv[j] = NULL; 524fa9e4066Sahrens (*argc)--; 525fa9e4066Sahrens } 526fa9e4066Sahrens } 527fa9e4066Sahrens 528fa9e4066Sahrens if (dprintf_string == NULL) { 529fa9e4066Sahrens /* Look for ZFS_DEBUG environment variable */ 530fa9e4066Sahrens dprintf_string = getenv("ZFS_DEBUG"); 531fa9e4066Sahrens } 532fa9e4066Sahrens 533fa9e4066Sahrens /* 534fa9e4066Sahrens * Are we just turning on all debugging? 535fa9e4066Sahrens */ 536fa9e4066Sahrens if (dprintf_find_string("on")) 537fa9e4066Sahrens dprintf_print_all = 1; 538fa9e4066Sahrens } 539fa9e4066Sahrens 540fa9e4066Sahrens /* 541fa9e4066Sahrens * ========================================================================= 542fa9e4066Sahrens * debug printfs 543fa9e4066Sahrens * ========================================================================= 544fa9e4066Sahrens */ 545fa9e4066Sahrens void 546fa9e4066Sahrens __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 547fa9e4066Sahrens { 548fa9e4066Sahrens const char *newfile; 549fa9e4066Sahrens va_list adx; 550fa9e4066Sahrens 551fa9e4066Sahrens /* 552fa9e4066Sahrens * Get rid of annoying "../common/" prefix to filename. 553fa9e4066Sahrens */ 554fa9e4066Sahrens newfile = strrchr(file, '/'); 555fa9e4066Sahrens if (newfile != NULL) { 556fa9e4066Sahrens newfile = newfile + 1; /* Get rid of leading / */ 557fa9e4066Sahrens } else { 558fa9e4066Sahrens newfile = file; 559fa9e4066Sahrens } 560fa9e4066Sahrens 561fa9e4066Sahrens if (dprintf_print_all || 562fa9e4066Sahrens dprintf_find_string(newfile) || 563fa9e4066Sahrens dprintf_find_string(func)) { 564fa9e4066Sahrens /* Print out just the function name if requested */ 565fa9e4066Sahrens flockfile(stdout); 566fa9e4066Sahrens if (dprintf_find_string("pid")) 567fa9e4066Sahrens (void) printf("%d ", getpid()); 568fa9e4066Sahrens if (dprintf_find_string("tid")) 569fa9e4066Sahrens (void) printf("%u ", thr_self()); 570fa9e4066Sahrens if (dprintf_find_string("cpu")) 571fa9e4066Sahrens (void) printf("%u ", getcpuid()); 572fa9e4066Sahrens if (dprintf_find_string("time")) 573fa9e4066Sahrens (void) printf("%llu ", gethrtime()); 574fa9e4066Sahrens if (dprintf_find_string("long")) 575fa9e4066Sahrens (void) printf("%s, line %d: ", newfile, line); 576fa9e4066Sahrens (void) printf("%s: ", func); 577fa9e4066Sahrens va_start(adx, fmt); 578fa9e4066Sahrens (void) vprintf(fmt, adx); 579fa9e4066Sahrens va_end(adx); 580fa9e4066Sahrens funlockfile(stdout); 581fa9e4066Sahrens } 582fa9e4066Sahrens } 583fa9e4066Sahrens 584fa9e4066Sahrens #endif /* ZFS_DEBUG */ 585fa9e4066Sahrens 586fa9e4066Sahrens /* 587fa9e4066Sahrens * ========================================================================= 588fa9e4066Sahrens * cmn_err() and panic() 589fa9e4066Sahrens * ========================================================================= 590fa9e4066Sahrens */ 591fa9e4066Sahrens static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; 592fa9e4066Sahrens static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; 593fa9e4066Sahrens 594fa9e4066Sahrens void 595fa9e4066Sahrens vpanic(const char *fmt, va_list adx) 596fa9e4066Sahrens { 597fa9e4066Sahrens (void) fprintf(stderr, "error: "); 598fa9e4066Sahrens (void) vfprintf(stderr, fmt, adx); 599fa9e4066Sahrens (void) fprintf(stderr, "\n"); 600fa9e4066Sahrens 601fa9e4066Sahrens abort(); /* think of it as a "user-level crash dump" */ 602fa9e4066Sahrens } 603fa9e4066Sahrens 604fa9e4066Sahrens void 605fa9e4066Sahrens panic(const char *fmt, ...) 606fa9e4066Sahrens { 607fa9e4066Sahrens va_list adx; 608fa9e4066Sahrens 609fa9e4066Sahrens va_start(adx, fmt); 610fa9e4066Sahrens vpanic(fmt, adx); 611fa9e4066Sahrens va_end(adx); 612fa9e4066Sahrens } 613fa9e4066Sahrens 614fa9e4066Sahrens void 6150125049cSahrens vcmn_err(int ce, const char *fmt, va_list adx) 616fa9e4066Sahrens { 617fa9e4066Sahrens if (ce == CE_PANIC) 618fa9e4066Sahrens vpanic(fmt, adx); 619fa9e4066Sahrens if (ce != CE_NOTE) { /* suppress noise in userland stress testing */ 620fa9e4066Sahrens (void) fprintf(stderr, "%s", ce_prefix[ce]); 621fa9e4066Sahrens (void) vfprintf(stderr, fmt, adx); 622fa9e4066Sahrens (void) fprintf(stderr, "%s", ce_suffix[ce]); 623fa9e4066Sahrens } 6240125049cSahrens } 6250125049cSahrens 6260125049cSahrens /*PRINTFLIKE2*/ 6270125049cSahrens void 6280125049cSahrens cmn_err(int ce, const char *fmt, ...) 6290125049cSahrens { 6300125049cSahrens va_list adx; 6310125049cSahrens 6320125049cSahrens va_start(adx, fmt); 6330125049cSahrens vcmn_err(ce, fmt, adx); 634fa9e4066Sahrens va_end(adx); 635fa9e4066Sahrens } 636fa9e4066Sahrens 637ea8dc4b6Seschrock /* 638ea8dc4b6Seschrock * ========================================================================= 639ea8dc4b6Seschrock * kobj interfaces 640ea8dc4b6Seschrock * ========================================================================= 641ea8dc4b6Seschrock */ 642ea8dc4b6Seschrock struct _buf * 643ea8dc4b6Seschrock kobj_open_file(char *name) 644ea8dc4b6Seschrock { 645ea8dc4b6Seschrock struct _buf *file; 646ea8dc4b6Seschrock vnode_t *vp; 647ea8dc4b6Seschrock 648ea8dc4b6Seschrock /* set vp as the _fd field of the file */ 649da6c28aaSamw if (vn_openat(name, UIO_SYSSPACE, FREAD, 0, &vp, 0, 0, rootdir, 650da6c28aaSamw -1) != 0) 651ea8dc4b6Seschrock return ((void *)-1UL); 652ea8dc4b6Seschrock 653ea8dc4b6Seschrock file = umem_zalloc(sizeof (struct _buf), UMEM_NOFAIL); 654ea8dc4b6Seschrock file->_fd = (intptr_t)vp; 655ea8dc4b6Seschrock return (file); 656ea8dc4b6Seschrock } 657ea8dc4b6Seschrock 658ea8dc4b6Seschrock int 659ea8dc4b6Seschrock kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off) 660ea8dc4b6Seschrock { 661ea8dc4b6Seschrock ssize_t resid; 662ea8dc4b6Seschrock 663ea8dc4b6Seschrock vn_rdwr(UIO_READ, (vnode_t *)file->_fd, buf, size, (offset_t)off, 664ea8dc4b6Seschrock UIO_SYSSPACE, 0, 0, 0, &resid); 665ea8dc4b6Seschrock 666b1b8ab34Slling return (size - resid); 667ea8dc4b6Seschrock } 668ea8dc4b6Seschrock 669ea8dc4b6Seschrock void 670ea8dc4b6Seschrock kobj_close_file(struct _buf *file) 671ea8dc4b6Seschrock { 672ea8dc4b6Seschrock vn_close((vnode_t *)file->_fd); 673ea8dc4b6Seschrock umem_free(file, sizeof (struct _buf)); 674ea8dc4b6Seschrock } 675ea8dc4b6Seschrock 676ea8dc4b6Seschrock int 677b1b8ab34Slling kobj_get_filesize(struct _buf *file, uint64_t *size) 678ea8dc4b6Seschrock { 679ea8dc4b6Seschrock struct stat64 st; 680b1b8ab34Slling vnode_t *vp = (vnode_t *)file->_fd; 681b1b8ab34Slling 682ea8dc4b6Seschrock if (fstat64(vp->v_fd, &st) == -1) { 683ea8dc4b6Seschrock vn_close(vp); 684ea8dc4b6Seschrock return (errno); 685ea8dc4b6Seschrock } 686b1b8ab34Slling *size = st.st_size; 687ea8dc4b6Seschrock return (0); 688ea8dc4b6Seschrock } 689ea8dc4b6Seschrock 690fa9e4066Sahrens /* 691fa9e4066Sahrens * ========================================================================= 692fa9e4066Sahrens * misc routines 693fa9e4066Sahrens * ========================================================================= 694fa9e4066Sahrens */ 695fa9e4066Sahrens 696fa9e4066Sahrens void 697fa9e4066Sahrens delay(clock_t ticks) 698fa9e4066Sahrens { 699fa9e4066Sahrens poll(0, 0, ticks * (1000 / hz)); 700fa9e4066Sahrens } 701fa9e4066Sahrens 702fa9e4066Sahrens /* 703fa9e4066Sahrens * Find highest one bit set. 704fa9e4066Sahrens * Returns bit number + 1 of highest bit that is set, otherwise returns 0. 705fa9e4066Sahrens * High order bit is 31 (or 63 in _LP64 kernel). 706fa9e4066Sahrens */ 707fa9e4066Sahrens int 708fa9e4066Sahrens highbit(ulong_t i) 709fa9e4066Sahrens { 710fa9e4066Sahrens register int h = 1; 711fa9e4066Sahrens 712fa9e4066Sahrens if (i == 0) 713fa9e4066Sahrens return (0); 714fa9e4066Sahrens #ifdef _LP64 715fa9e4066Sahrens if (i & 0xffffffff00000000ul) { 716fa9e4066Sahrens h += 32; i >>= 32; 717fa9e4066Sahrens } 718fa9e4066Sahrens #endif 719fa9e4066Sahrens if (i & 0xffff0000) { 720fa9e4066Sahrens h += 16; i >>= 16; 721fa9e4066Sahrens } 722fa9e4066Sahrens if (i & 0xff00) { 723fa9e4066Sahrens h += 8; i >>= 8; 724fa9e4066Sahrens } 725fa9e4066Sahrens if (i & 0xf0) { 726fa9e4066Sahrens h += 4; i >>= 4; 727fa9e4066Sahrens } 728fa9e4066Sahrens if (i & 0xc) { 729fa9e4066Sahrens h += 2; i >>= 2; 730fa9e4066Sahrens } 731fa9e4066Sahrens if (i & 0x2) { 732fa9e4066Sahrens h += 1; 733fa9e4066Sahrens } 734fa9e4066Sahrens return (h); 735fa9e4066Sahrens } 736fa9e4066Sahrens 73717f17c2dSbonwick static int random_fd = -1, urandom_fd = -1; 73817f17c2dSbonwick 739fa9e4066Sahrens static int 74017f17c2dSbonwick random_get_bytes_common(uint8_t *ptr, size_t len, int fd) 741fa9e4066Sahrens { 742fa9e4066Sahrens size_t resid = len; 743fa9e4066Sahrens ssize_t bytes; 744fa9e4066Sahrens 745fa9e4066Sahrens ASSERT(fd != -1); 746fa9e4066Sahrens 747fa9e4066Sahrens while (resid != 0) { 748fa9e4066Sahrens bytes = read(fd, ptr, resid); 74917f17c2dSbonwick ASSERT3S(bytes, >=, 0); 750fa9e4066Sahrens ptr += bytes; 751fa9e4066Sahrens resid -= bytes; 752fa9e4066Sahrens } 753fa9e4066Sahrens 754fa9e4066Sahrens return (0); 755fa9e4066Sahrens } 756fa9e4066Sahrens 757fa9e4066Sahrens int 758fa9e4066Sahrens random_get_bytes(uint8_t *ptr, size_t len) 759fa9e4066Sahrens { 76017f17c2dSbonwick return (random_get_bytes_common(ptr, len, random_fd)); 761fa9e4066Sahrens } 762fa9e4066Sahrens 763fa9e4066Sahrens int 764fa9e4066Sahrens random_get_pseudo_bytes(uint8_t *ptr, size_t len) 765fa9e4066Sahrens { 76617f17c2dSbonwick return (random_get_bytes_common(ptr, len, urandom_fd)); 767fa9e4066Sahrens } 768fa9e4066Sahrens 76995173954Sek int 77095173954Sek ddi_strtoul(const char *hw_serial, char **nptr, int base, unsigned long *result) 77195173954Sek { 77295173954Sek char *end; 77395173954Sek 77495173954Sek *result = strtoul(hw_serial, &end, base); 77595173954Sek if (*result == 0) 77695173954Sek return (errno); 77795173954Sek return (0); 77895173954Sek } 77995173954Sek 7800a586ceaSMark Shellenbaum int 7810a586ceaSMark Shellenbaum ddi_strtoull(const char *str, char **nptr, int base, u_longlong_t *result) 7820a586ceaSMark Shellenbaum { 7830a586ceaSMark Shellenbaum char *end; 7840a586ceaSMark Shellenbaum 7850a586ceaSMark Shellenbaum *result = strtoull(str, &end, base); 7860a586ceaSMark Shellenbaum if (*result == 0) 7870a586ceaSMark Shellenbaum return (errno); 7880a586ceaSMark Shellenbaum return (0); 7890a586ceaSMark Shellenbaum } 7900a586ceaSMark Shellenbaum 791fa9e4066Sahrens /* 792fa9e4066Sahrens * ========================================================================= 793fa9e4066Sahrens * kernel emulation setup & teardown 794fa9e4066Sahrens * ========================================================================= 795fa9e4066Sahrens */ 796fa9e4066Sahrens static int 797fa9e4066Sahrens umem_out_of_memory(void) 798fa9e4066Sahrens { 799fa9e4066Sahrens char errmsg[] = "out of memory -- generating core dump\n"; 800fa9e4066Sahrens 801fa9e4066Sahrens write(fileno(stderr), errmsg, sizeof (errmsg)); 802fa9e4066Sahrens abort(); 803fa9e4066Sahrens return (0); 804fa9e4066Sahrens } 805fa9e4066Sahrens 806fa9e4066Sahrens void 807fa9e4066Sahrens kernel_init(int mode) 808fa9e4066Sahrens { 809fa9e4066Sahrens umem_nofail_callback(umem_out_of_memory); 810fa9e4066Sahrens 811fa9e4066Sahrens physmem = sysconf(_SC_PHYS_PAGES); 812fa9e4066Sahrens 813fa9e4066Sahrens dprintf("physmem = %llu pages (%.2f GB)\n", physmem, 814fa9e4066Sahrens (double)physmem * sysconf(_SC_PAGE_SIZE) / (1ULL << 30)); 815fa9e4066Sahrens 8163ad6c7f9SVictor Latushkin (void) snprintf(hw_serial, sizeof (hw_serial), "%ld", 8173ad6c7f9SVictor Latushkin (mode & FWRITE) ? gethostid() : 0); 81895173954Sek 81917f17c2dSbonwick VERIFY((random_fd = open("/dev/random", O_RDONLY)) != -1); 82017f17c2dSbonwick VERIFY((urandom_fd = open("/dev/urandom", O_RDONLY)) != -1); 82117f17c2dSbonwick 82288b7b0f2SMatthew Ahrens system_taskq_init(); 82388b7b0f2SMatthew Ahrens 824fa9e4066Sahrens spa_init(mode); 825fa9e4066Sahrens } 826fa9e4066Sahrens 827fa9e4066Sahrens void 828fa9e4066Sahrens kernel_fini(void) 829fa9e4066Sahrens { 830fa9e4066Sahrens spa_fini(); 83117f17c2dSbonwick 832d20e665cSRicardo M. Correia system_taskq_fini(); 833d20e665cSRicardo M. Correia 83417f17c2dSbonwick close(random_fd); 83517f17c2dSbonwick close(urandom_fd); 83617f17c2dSbonwick 83717f17c2dSbonwick random_fd = -1; 83817f17c2dSbonwick urandom_fd = -1; 839fa9e4066Sahrens } 840c9431fa1Sahl 841c9431fa1Sahl int 842c9431fa1Sahl z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen) 843c9431fa1Sahl { 844c9431fa1Sahl int ret; 845c9431fa1Sahl uLongf len = *dstlen; 846c9431fa1Sahl 847c9431fa1Sahl if ((ret = uncompress(dst, &len, src, srclen)) == Z_OK) 848c9431fa1Sahl *dstlen = (size_t)len; 849c9431fa1Sahl 850c9431fa1Sahl return (ret); 851c9431fa1Sahl } 852c9431fa1Sahl 853c9431fa1Sahl int 854c9431fa1Sahl z_compress_level(void *dst, size_t *dstlen, const void *src, size_t srclen, 855c9431fa1Sahl int level) 856c9431fa1Sahl { 857c9431fa1Sahl int ret; 858c9431fa1Sahl uLongf len = *dstlen; 859c9431fa1Sahl 860c9431fa1Sahl if ((ret = compress2(dst, &len, src, srclen, level)) == Z_OK) 861c9431fa1Sahl *dstlen = (size_t)len; 862c9431fa1Sahl 863c9431fa1Sahl return (ret); 864c9431fa1Sahl } 865ecd6cf80Smarks 866ecd6cf80Smarks uid_t 867ecd6cf80Smarks crgetuid(cred_t *cr) 868ecd6cf80Smarks { 869ecd6cf80Smarks return (0); 870ecd6cf80Smarks } 871ecd6cf80Smarks 872ecd6cf80Smarks gid_t 873ecd6cf80Smarks crgetgid(cred_t *cr) 874ecd6cf80Smarks { 875ecd6cf80Smarks return (0); 876ecd6cf80Smarks } 877ecd6cf80Smarks 878ecd6cf80Smarks int 879ecd6cf80Smarks crgetngroups(cred_t *cr) 880ecd6cf80Smarks { 881ecd6cf80Smarks return (0); 882ecd6cf80Smarks } 883ecd6cf80Smarks 884ecd6cf80Smarks gid_t * 885ecd6cf80Smarks crgetgroups(cred_t *cr) 886ecd6cf80Smarks { 887ecd6cf80Smarks return (NULL); 888ecd6cf80Smarks } 889ecd6cf80Smarks 890ecd6cf80Smarks int 891ecd6cf80Smarks zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr) 892ecd6cf80Smarks { 893ecd6cf80Smarks return (0); 894ecd6cf80Smarks } 895ecd6cf80Smarks 896ecd6cf80Smarks int 897ecd6cf80Smarks zfs_secpolicy_rename_perms(const char *from, const char *to, cred_t *cr) 898ecd6cf80Smarks { 899ecd6cf80Smarks return (0); 900ecd6cf80Smarks } 901ecd6cf80Smarks 902ecd6cf80Smarks int 903ecd6cf80Smarks zfs_secpolicy_destroy_perms(const char *name, cred_t *cr) 904ecd6cf80Smarks { 905ecd6cf80Smarks return (0); 906ecd6cf80Smarks } 907e0d35c44Smarks 908e0d35c44Smarks ksiddomain_t * 909e0d35c44Smarks ksid_lookupdomain(const char *dom) 910e0d35c44Smarks { 911e0d35c44Smarks ksiddomain_t *kd; 912e0d35c44Smarks 913e0d35c44Smarks kd = umem_zalloc(sizeof (ksiddomain_t), UMEM_NOFAIL); 914e0d35c44Smarks kd->kd_name = spa_strdup(dom); 915e0d35c44Smarks return (kd); 916e0d35c44Smarks } 917e0d35c44Smarks 918e0d35c44Smarks void 919e0d35c44Smarks ksiddomain_rele(ksiddomain_t *ksid) 920e0d35c44Smarks { 921e0d35c44Smarks spa_strfree(ksid->kd_name); 922e0d35c44Smarks umem_free(ksid, sizeof (ksiddomain_t)); 923e0d35c44Smarks } 924ae46e4c7SMatthew Ahrens 925ae46e4c7SMatthew Ahrens /* 926ae46e4c7SMatthew Ahrens * Do not change the length of the returned string; it must be freed 927ae46e4c7SMatthew Ahrens * with strfree(). 928ae46e4c7SMatthew Ahrens */ 929ae46e4c7SMatthew Ahrens char * 930ae46e4c7SMatthew Ahrens kmem_asprintf(const char *fmt, ...) 931ae46e4c7SMatthew Ahrens { 932ae46e4c7SMatthew Ahrens int size; 933ae46e4c7SMatthew Ahrens va_list adx; 934ae46e4c7SMatthew Ahrens char *buf; 935ae46e4c7SMatthew Ahrens 936ae46e4c7SMatthew Ahrens va_start(adx, fmt); 937ae46e4c7SMatthew Ahrens size = vsnprintf(NULL, 0, fmt, adx) + 1; 938ae46e4c7SMatthew Ahrens va_end(adx); 939ae46e4c7SMatthew Ahrens 940ae46e4c7SMatthew Ahrens buf = kmem_alloc(size, KM_SLEEP); 941ae46e4c7SMatthew Ahrens 942ae46e4c7SMatthew Ahrens va_start(adx, fmt); 943ae46e4c7SMatthew Ahrens size = vsnprintf(buf, size, fmt, adx); 944ae46e4c7SMatthew Ahrens va_end(adx); 945ae46e4c7SMatthew Ahrens 946ae46e4c7SMatthew Ahrens return (buf); 947ae46e4c7SMatthew Ahrens } 948c99e4bdcSChris Kirby 949c99e4bdcSChris Kirby /* ARGSUSED */ 950c99e4bdcSChris Kirby int 951a7f53a56SChris Kirby zfs_onexit_fd_hold(int fd, minor_t *minorp) 952a7f53a56SChris Kirby { 953a7f53a56SChris Kirby *minorp = 0; 954a7f53a56SChris Kirby return (0); 955a7f53a56SChris Kirby } 956a7f53a56SChris Kirby 957a7f53a56SChris Kirby /* ARGSUSED */ 958a7f53a56SChris Kirby void 959a7f53a56SChris Kirby zfs_onexit_fd_rele(int fd) 960a7f53a56SChris Kirby { 961a7f53a56SChris Kirby } 962a7f53a56SChris Kirby 963a7f53a56SChris Kirby /* ARGSUSED */ 964a7f53a56SChris Kirby int 965a7f53a56SChris Kirby zfs_onexit_add_cb(minor_t minor, void (*func)(void *), void *data, 966c99e4bdcSChris Kirby uint64_t *action_handle) 967c99e4bdcSChris Kirby { 968c99e4bdcSChris Kirby return (0); 969c99e4bdcSChris Kirby } 970c99e4bdcSChris Kirby 971c99e4bdcSChris Kirby /* ARGSUSED */ 972c99e4bdcSChris Kirby int 973a7f53a56SChris Kirby zfs_onexit_del_cb(minor_t minor, uint64_t action_handle, boolean_t fire) 974c99e4bdcSChris Kirby { 975c99e4bdcSChris Kirby return (0); 976c99e4bdcSChris Kirby } 977c99e4bdcSChris Kirby 978c99e4bdcSChris Kirby /* ARGSUSED */ 979c99e4bdcSChris Kirby int 980a7f53a56SChris Kirby zfs_onexit_cb_data(minor_t minor, uint64_t action_handle, void **data) 981c99e4bdcSChris Kirby { 982c99e4bdcSChris Kirby return (0); 983c99e4bdcSChris Kirby } 984