1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5*ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6*ea8dc4b6Seschrock * 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 /* 22*ea8dc4b6Seschrock * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26fa9e4066Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27fa9e4066Sahrens 28fa9e4066Sahrens #include <assert.h> 29fa9e4066Sahrens #include <sys/zfs_context.h> 30fa9e4066Sahrens #include <poll.h> 31fa9e4066Sahrens #include <string.h> 32fa9e4066Sahrens #include <stdio.h> 33fa9e4066Sahrens #include <stdlib.h> 34fa9e4066Sahrens #include <fcntl.h> 35fa9e4066Sahrens #include <sys/stat.h> 36fa9e4066Sahrens #include <sys/spa.h> 37fa9e4066Sahrens #include <sys/processor.h> 38fa9e4066Sahrens 39fa9e4066Sahrens /* 40fa9e4066Sahrens * Emulation of kernel services in userland. 41fa9e4066Sahrens */ 42fa9e4066Sahrens 43fa9e4066Sahrens uint64_t physmem; 44fa9e4066Sahrens vnode_t *rootdir = (vnode_t *)0xabcd1234; 45*ea8dc4b6Seschrock int modrootloaded = 0; 46fa9e4066Sahrens 47fa9e4066Sahrens /* 48fa9e4066Sahrens * ========================================================================= 49fa9e4066Sahrens * threads 50fa9e4066Sahrens * ========================================================================= 51fa9e4066Sahrens */ 52fa9e4066Sahrens /*ARGSUSED*/ 53fa9e4066Sahrens kthread_t * 54fa9e4066Sahrens zk_thread_create(void (*func)(), void *arg) 55fa9e4066Sahrens { 56fa9e4066Sahrens thread_t tid; 57fa9e4066Sahrens 58fa9e4066Sahrens VERIFY(thr_create(0, 0, (void *(*)(void *))func, arg, THR_DETACHED, 59fa9e4066Sahrens &tid) == 0); 60fa9e4066Sahrens 61fa9e4066Sahrens return ((void *)(uintptr_t)tid); 62fa9e4066Sahrens } 63fa9e4066Sahrens 64fa9e4066Sahrens /* 65fa9e4066Sahrens * ========================================================================= 66fa9e4066Sahrens * mutexes 67fa9e4066Sahrens * ========================================================================= 68fa9e4066Sahrens */ 69fa9e4066Sahrens void 70fa9e4066Sahrens zmutex_init(kmutex_t *mp) 71fa9e4066Sahrens { 72fa9e4066Sahrens mp->m_owner = NULL; 73fa9e4066Sahrens (void) _mutex_init(&mp->m_lock, USYNC_THREAD, NULL); 74fa9e4066Sahrens } 75fa9e4066Sahrens 76fa9e4066Sahrens void 77fa9e4066Sahrens zmutex_destroy(kmutex_t *mp) 78fa9e4066Sahrens { 79fa9e4066Sahrens ASSERT(mp->m_owner == NULL); 80fa9e4066Sahrens (void) _mutex_destroy(&(mp)->m_lock); 81fa9e4066Sahrens mp->m_owner = (void *)-1UL; 82fa9e4066Sahrens } 83fa9e4066Sahrens 84fa9e4066Sahrens void 85fa9e4066Sahrens mutex_enter(kmutex_t *mp) 86fa9e4066Sahrens { 87fa9e4066Sahrens ASSERT(mp->m_owner != (void *)-1UL); 88fa9e4066Sahrens ASSERT(mp->m_owner != curthread); 89fa9e4066Sahrens (void) mutex_lock(&mp->m_lock); 90fa9e4066Sahrens ASSERT(mp->m_owner == NULL); 91fa9e4066Sahrens mp->m_owner = curthread; 92fa9e4066Sahrens } 93fa9e4066Sahrens 94fa9e4066Sahrens int 95fa9e4066Sahrens mutex_tryenter(kmutex_t *mp) 96fa9e4066Sahrens { 97fa9e4066Sahrens ASSERT(mp->m_owner != (void *)-1UL); 98fa9e4066Sahrens if (0 == mutex_trylock(&mp->m_lock)) { 99fa9e4066Sahrens ASSERT(mp->m_owner == NULL); 100fa9e4066Sahrens mp->m_owner = curthread; 101fa9e4066Sahrens return (1); 102fa9e4066Sahrens } else { 103fa9e4066Sahrens return (0); 104fa9e4066Sahrens } 105fa9e4066Sahrens } 106fa9e4066Sahrens 107fa9e4066Sahrens void 108fa9e4066Sahrens mutex_exit(kmutex_t *mp) 109fa9e4066Sahrens { 110fa9e4066Sahrens ASSERT(mutex_owner(mp) == curthread); 111fa9e4066Sahrens mp->m_owner = NULL; 112fa9e4066Sahrens (void) mutex_unlock(&mp->m_lock); 113fa9e4066Sahrens } 114fa9e4066Sahrens 115fa9e4066Sahrens void * 116fa9e4066Sahrens mutex_owner(kmutex_t *mp) 117fa9e4066Sahrens { 118fa9e4066Sahrens return (mp->m_owner); 119fa9e4066Sahrens } 120fa9e4066Sahrens 121fa9e4066Sahrens /* 122fa9e4066Sahrens * ========================================================================= 123fa9e4066Sahrens * rwlocks 124fa9e4066Sahrens * ========================================================================= 125fa9e4066Sahrens */ 126fa9e4066Sahrens /*ARGSUSED*/ 127fa9e4066Sahrens void 128fa9e4066Sahrens rw_init(krwlock_t *rwlp, char *name, int type, void *arg) 129fa9e4066Sahrens { 130fa9e4066Sahrens rwlock_init(&rwlp->rw_lock, USYNC_THREAD, NULL); 131fa9e4066Sahrens rwlp->rw_owner = NULL; 132fa9e4066Sahrens } 133fa9e4066Sahrens 134fa9e4066Sahrens void 135fa9e4066Sahrens rw_destroy(krwlock_t *rwlp) 136fa9e4066Sahrens { 137fa9e4066Sahrens rwlock_destroy(&rwlp->rw_lock); 138fa9e4066Sahrens rwlp->rw_owner = (void *)-1UL; 139fa9e4066Sahrens } 140fa9e4066Sahrens 141fa9e4066Sahrens void 142fa9e4066Sahrens rw_enter(krwlock_t *rwlp, krw_t rw) 143fa9e4066Sahrens { 144fa9e4066Sahrens ASSERT(!RW_LOCK_HELD(rwlp)); 145fa9e4066Sahrens ASSERT(rwlp->rw_owner != (void *)-1UL); 146fa9e4066Sahrens ASSERT(rwlp->rw_owner != curthread); 147fa9e4066Sahrens 148fa9e4066Sahrens if (rw == RW_READER) 149fa9e4066Sahrens (void) rw_rdlock(&rwlp->rw_lock); 150fa9e4066Sahrens else 151fa9e4066Sahrens (void) rw_wrlock(&rwlp->rw_lock); 152fa9e4066Sahrens 153fa9e4066Sahrens rwlp->rw_owner = curthread; 154fa9e4066Sahrens } 155fa9e4066Sahrens 156fa9e4066Sahrens void 157fa9e4066Sahrens rw_exit(krwlock_t *rwlp) 158fa9e4066Sahrens { 159fa9e4066Sahrens ASSERT(rwlp->rw_owner != (void *)-1UL); 160fa9e4066Sahrens 161fa9e4066Sahrens rwlp->rw_owner = NULL; 162fa9e4066Sahrens (void) rw_unlock(&rwlp->rw_lock); 163fa9e4066Sahrens } 164fa9e4066Sahrens 165fa9e4066Sahrens int 166fa9e4066Sahrens rw_tryenter(krwlock_t *rwlp, krw_t rw) 167fa9e4066Sahrens { 168fa9e4066Sahrens int rv; 169fa9e4066Sahrens 170fa9e4066Sahrens ASSERT(rwlp->rw_owner != (void *)-1UL); 171fa9e4066Sahrens 172fa9e4066Sahrens if (rw == RW_READER) 173fa9e4066Sahrens rv = rw_tryrdlock(&rwlp->rw_lock); 174fa9e4066Sahrens else 175fa9e4066Sahrens rv = rw_trywrlock(&rwlp->rw_lock); 176fa9e4066Sahrens 177fa9e4066Sahrens if (rv == 0) { 178fa9e4066Sahrens rwlp->rw_owner = curthread; 179fa9e4066Sahrens return (1); 180fa9e4066Sahrens } 181fa9e4066Sahrens 182fa9e4066Sahrens return (0); 183fa9e4066Sahrens } 184fa9e4066Sahrens 185fa9e4066Sahrens /*ARGSUSED*/ 186fa9e4066Sahrens int 187fa9e4066Sahrens rw_tryupgrade(krwlock_t *rwlp) 188fa9e4066Sahrens { 189fa9e4066Sahrens ASSERT(rwlp->rw_owner != (void *)-1UL); 190fa9e4066Sahrens 191fa9e4066Sahrens return (0); 192fa9e4066Sahrens } 193fa9e4066Sahrens 194fa9e4066Sahrens /* 195fa9e4066Sahrens * ========================================================================= 196fa9e4066Sahrens * condition variables 197fa9e4066Sahrens * ========================================================================= 198fa9e4066Sahrens */ 199fa9e4066Sahrens /*ARGSUSED*/ 200fa9e4066Sahrens void 201fa9e4066Sahrens cv_init(kcondvar_t *cv, char *name, int type, void *arg) 202fa9e4066Sahrens { 203fa9e4066Sahrens (void) cond_init(cv, type, NULL); 204fa9e4066Sahrens } 205fa9e4066Sahrens 206fa9e4066Sahrens void 207fa9e4066Sahrens cv_destroy(kcondvar_t *cv) 208fa9e4066Sahrens { 209fa9e4066Sahrens (void) cond_destroy(cv); 210fa9e4066Sahrens } 211fa9e4066Sahrens 212fa9e4066Sahrens void 213fa9e4066Sahrens cv_wait(kcondvar_t *cv, kmutex_t *mp) 214fa9e4066Sahrens { 215fa9e4066Sahrens ASSERT(mutex_owner(mp) == curthread); 216fa9e4066Sahrens mp->m_owner = NULL; 217fa9e4066Sahrens (void) cond_wait(cv, &mp->m_lock); 218fa9e4066Sahrens mp->m_owner = curthread; 219fa9e4066Sahrens } 220fa9e4066Sahrens 221fa9e4066Sahrens clock_t 222fa9e4066Sahrens cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime) 223fa9e4066Sahrens { 224fa9e4066Sahrens int error; 225fa9e4066Sahrens timestruc_t ts; 226fa9e4066Sahrens clock_t delta; 227fa9e4066Sahrens 228fa9e4066Sahrens top: 229fa9e4066Sahrens delta = abstime - lbolt; 230fa9e4066Sahrens if (delta <= 0) 231fa9e4066Sahrens return (-1); 232fa9e4066Sahrens 233fa9e4066Sahrens ts.tv_sec = delta / hz; 234fa9e4066Sahrens ts.tv_nsec = (delta % hz) * (NANOSEC / hz); 235fa9e4066Sahrens 236fa9e4066Sahrens ASSERT(mutex_owner(mp) == curthread); 237fa9e4066Sahrens mp->m_owner = NULL; 238fa9e4066Sahrens error = cond_reltimedwait(cv, &mp->m_lock, &ts); 239fa9e4066Sahrens mp->m_owner = curthread; 240fa9e4066Sahrens 241fa9e4066Sahrens if (error == ETIME) 242fa9e4066Sahrens return (-1); 243fa9e4066Sahrens 244fa9e4066Sahrens if (error == EINTR) 245fa9e4066Sahrens goto top; 246fa9e4066Sahrens 247fa9e4066Sahrens ASSERT(error == 0); 248fa9e4066Sahrens 249fa9e4066Sahrens return (1); 250fa9e4066Sahrens } 251fa9e4066Sahrens 252fa9e4066Sahrens void 253fa9e4066Sahrens cv_signal(kcondvar_t *cv) 254fa9e4066Sahrens { 255fa9e4066Sahrens (void) cond_signal(cv); 256fa9e4066Sahrens } 257fa9e4066Sahrens 258fa9e4066Sahrens void 259fa9e4066Sahrens cv_broadcast(kcondvar_t *cv) 260fa9e4066Sahrens { 261fa9e4066Sahrens (void) cond_broadcast(cv); 262fa9e4066Sahrens } 263fa9e4066Sahrens 264fa9e4066Sahrens /* 265fa9e4066Sahrens * ========================================================================= 266fa9e4066Sahrens * vnode operations 267fa9e4066Sahrens * ========================================================================= 268fa9e4066Sahrens */ 269fa9e4066Sahrens /* 270fa9e4066Sahrens * Note: for the xxxat() versions of these functions, we assume that the 271fa9e4066Sahrens * starting vp is always rootdir (which is true for spa_directory.c, the only 272fa9e4066Sahrens * ZFS consumer of these interfaces). We assert this is true, and then emulate 273fa9e4066Sahrens * them by adding '/' in front of the path. 274fa9e4066Sahrens */ 275fa9e4066Sahrens 276fa9e4066Sahrens /*ARGSUSED*/ 277fa9e4066Sahrens int 278fa9e4066Sahrens vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3) 279fa9e4066Sahrens { 280fa9e4066Sahrens int fd; 281fa9e4066Sahrens vnode_t *vp; 282fa9e4066Sahrens int old_umask; 283fa9e4066Sahrens char realpath[MAXPATHLEN]; 284fa9e4066Sahrens struct stat64 st; 285fa9e4066Sahrens 286fa9e4066Sahrens /* 287fa9e4066Sahrens * If we're accessing a real disk from userland, we need to use 288fa9e4066Sahrens * the character interface to avoid caching. This is particularly 289fa9e4066Sahrens * important if we're trying to look at a real in-kernel storage 290fa9e4066Sahrens * pool from userland, e.g. via zdb, because otherwise we won't 291fa9e4066Sahrens * see the changes occurring under the segmap cache. 292fa9e4066Sahrens * On the other hand, the stupid character device returns zero 293fa9e4066Sahrens * for its size. So -- gag -- we open the block device to get 294fa9e4066Sahrens * its size, and remember it for subsequent VOP_GETATTR(). 295fa9e4066Sahrens */ 296fa9e4066Sahrens if (strncmp(path, "/dev/", 5) == 0) { 297fa9e4066Sahrens char *dsk; 298fa9e4066Sahrens fd = open64(path, O_RDONLY); 299fa9e4066Sahrens if (fd == -1) 300fa9e4066Sahrens return (errno); 301fa9e4066Sahrens if (fstat64(fd, &st) == -1) { 302fa9e4066Sahrens close(fd); 303fa9e4066Sahrens return (errno); 304fa9e4066Sahrens } 305fa9e4066Sahrens close(fd); 306fa9e4066Sahrens (void) sprintf(realpath, "%s", path); 307fa9e4066Sahrens dsk = strstr(path, "/dsk/"); 308fa9e4066Sahrens if (dsk != NULL) 309fa9e4066Sahrens (void) sprintf(realpath + (dsk - path) + 1, "r%s", 310fa9e4066Sahrens dsk + 1); 311fa9e4066Sahrens } else { 312fa9e4066Sahrens (void) sprintf(realpath, "%s", path); 313fa9e4066Sahrens if (!(flags & FCREAT) && stat64(realpath, &st) == -1) 314fa9e4066Sahrens return (errno); 315fa9e4066Sahrens } 316fa9e4066Sahrens 317fa9e4066Sahrens if (flags & FCREAT) 318fa9e4066Sahrens old_umask = umask(0); 319fa9e4066Sahrens 320fa9e4066Sahrens /* 321fa9e4066Sahrens * The construct 'flags - FREAD' conveniently maps combinations of 322fa9e4066Sahrens * FREAD and FWRITE to the corresponding O_RDONLY, O_WRONLY, and O_RDWR. 323fa9e4066Sahrens */ 324fa9e4066Sahrens fd = open64(realpath, flags - FREAD, mode); 325fa9e4066Sahrens 326fa9e4066Sahrens if (flags & FCREAT) 327fa9e4066Sahrens (void) umask(old_umask); 328fa9e4066Sahrens 329fa9e4066Sahrens if (fd == -1) 330fa9e4066Sahrens return (errno); 331fa9e4066Sahrens 332fa9e4066Sahrens if (fstat64(fd, &st) == -1) { 333fa9e4066Sahrens close(fd); 334fa9e4066Sahrens return (errno); 335fa9e4066Sahrens } 336fa9e4066Sahrens 337fa9e4066Sahrens (void) fcntl(fd, F_SETFD, FD_CLOEXEC); 338fa9e4066Sahrens 339fa9e4066Sahrens *vpp = vp = umem_zalloc(sizeof (vnode_t), UMEM_NOFAIL); 340fa9e4066Sahrens 341fa9e4066Sahrens vp->v_fd = fd; 342fa9e4066Sahrens vp->v_size = st.st_size; 343fa9e4066Sahrens vp->v_path = spa_strdup(path); 344fa9e4066Sahrens 345fa9e4066Sahrens return (0); 346fa9e4066Sahrens } 347fa9e4066Sahrens 348fa9e4066Sahrens int 349fa9e4066Sahrens vn_openat(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, 350fa9e4066Sahrens int x3, vnode_t *startvp) 351fa9e4066Sahrens { 352fa9e4066Sahrens char *realpath = umem_alloc(strlen(path) + 2, UMEM_NOFAIL); 353fa9e4066Sahrens int ret; 354fa9e4066Sahrens 355fa9e4066Sahrens ASSERT(startvp == rootdir); 356fa9e4066Sahrens (void) sprintf(realpath, "/%s", path); 357fa9e4066Sahrens 358fa9e4066Sahrens ret = vn_open(realpath, x1, flags, mode, vpp, x2, x3); 359fa9e4066Sahrens 360fa9e4066Sahrens umem_free(realpath, strlen(path) + 2); 361fa9e4066Sahrens 362fa9e4066Sahrens return (ret); 363fa9e4066Sahrens } 364fa9e4066Sahrens 365fa9e4066Sahrens /*ARGSUSED*/ 366fa9e4066Sahrens int 367fa9e4066Sahrens vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset, 368fa9e4066Sahrens int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp) 369fa9e4066Sahrens { 370fa9e4066Sahrens ssize_t iolen, split; 371fa9e4066Sahrens 372fa9e4066Sahrens if (uio == UIO_READ) { 373fa9e4066Sahrens iolen = pread64(vp->v_fd, addr, len, offset); 374fa9e4066Sahrens } else { 375fa9e4066Sahrens /* 376fa9e4066Sahrens * To simulate partial disk writes, we split writes into two 377fa9e4066Sahrens * system calls so that the process can be killed in between. 378fa9e4066Sahrens */ 379fa9e4066Sahrens split = (len > 0 ? rand() % len : 0); 380fa9e4066Sahrens iolen = pwrite64(vp->v_fd, addr, split, offset); 381fa9e4066Sahrens iolen += pwrite64(vp->v_fd, (char *)addr + split, 382fa9e4066Sahrens len - split, offset + split); 383fa9e4066Sahrens } 384fa9e4066Sahrens 385fa9e4066Sahrens if (iolen == -1) 386fa9e4066Sahrens return (errno); 387fa9e4066Sahrens if (residp) 388fa9e4066Sahrens *residp = len - iolen; 389fa9e4066Sahrens else if (iolen != len) 390fa9e4066Sahrens return (EIO); 391fa9e4066Sahrens return (0); 392fa9e4066Sahrens } 393fa9e4066Sahrens 394fa9e4066Sahrens void 395fa9e4066Sahrens vn_close(vnode_t *vp) 396fa9e4066Sahrens { 397fa9e4066Sahrens close(vp->v_fd); 398fa9e4066Sahrens spa_strfree(vp->v_path); 399fa9e4066Sahrens umem_free(vp, sizeof (vnode_t)); 400fa9e4066Sahrens } 401fa9e4066Sahrens 402fa9e4066Sahrens #ifdef ZFS_DEBUG 403fa9e4066Sahrens 404fa9e4066Sahrens /* 405fa9e4066Sahrens * ========================================================================= 406fa9e4066Sahrens * Figure out which debugging statements to print 407fa9e4066Sahrens * ========================================================================= 408fa9e4066Sahrens */ 409fa9e4066Sahrens 410fa9e4066Sahrens static char *dprintf_string; 411fa9e4066Sahrens static int dprintf_print_all; 412fa9e4066Sahrens 413fa9e4066Sahrens int 414fa9e4066Sahrens dprintf_find_string(const char *string) 415fa9e4066Sahrens { 416fa9e4066Sahrens char *tmp_str = dprintf_string; 417fa9e4066Sahrens int len = strlen(string); 418fa9e4066Sahrens 419fa9e4066Sahrens /* 420fa9e4066Sahrens * Find out if this is a string we want to print. 421fa9e4066Sahrens * String format: file1.c,function_name1,file2.c,file3.c 422fa9e4066Sahrens */ 423fa9e4066Sahrens 424fa9e4066Sahrens while (tmp_str != NULL) { 425fa9e4066Sahrens if (strncmp(tmp_str, string, len) == 0 && 426fa9e4066Sahrens (tmp_str[len] == ',' || tmp_str[len] == '\0')) 427fa9e4066Sahrens return (1); 428fa9e4066Sahrens tmp_str = strchr(tmp_str, ','); 429fa9e4066Sahrens if (tmp_str != NULL) 430fa9e4066Sahrens tmp_str++; /* Get rid of , */ 431fa9e4066Sahrens } 432fa9e4066Sahrens return (0); 433fa9e4066Sahrens } 434fa9e4066Sahrens 435fa9e4066Sahrens void 436fa9e4066Sahrens dprintf_setup(int *argc, char **argv) 437fa9e4066Sahrens { 438fa9e4066Sahrens int i, j; 439fa9e4066Sahrens 440fa9e4066Sahrens /* 441fa9e4066Sahrens * Debugging can be specified two ways: by setting the 442fa9e4066Sahrens * environment variable ZFS_DEBUG, or by including a 443fa9e4066Sahrens * "debug=..." argument on the command line. The command 444fa9e4066Sahrens * line setting overrides the environment variable. 445fa9e4066Sahrens */ 446fa9e4066Sahrens 447fa9e4066Sahrens for (i = 1; i < *argc; i++) { 448fa9e4066Sahrens int len = strlen("debug="); 449fa9e4066Sahrens /* First look for a command line argument */ 450fa9e4066Sahrens if (strncmp("debug=", argv[i], len) == 0) { 451fa9e4066Sahrens dprintf_string = argv[i] + len; 452fa9e4066Sahrens /* Remove from args */ 453fa9e4066Sahrens for (j = i; j < *argc; j++) 454fa9e4066Sahrens argv[j] = argv[j+1]; 455fa9e4066Sahrens argv[j] = NULL; 456fa9e4066Sahrens (*argc)--; 457fa9e4066Sahrens } 458fa9e4066Sahrens } 459fa9e4066Sahrens 460fa9e4066Sahrens if (dprintf_string == NULL) { 461fa9e4066Sahrens /* Look for ZFS_DEBUG environment variable */ 462fa9e4066Sahrens dprintf_string = getenv("ZFS_DEBUG"); 463fa9e4066Sahrens } 464fa9e4066Sahrens 465fa9e4066Sahrens /* 466fa9e4066Sahrens * Are we just turning on all debugging? 467fa9e4066Sahrens */ 468fa9e4066Sahrens if (dprintf_find_string("on")) 469fa9e4066Sahrens dprintf_print_all = 1; 470fa9e4066Sahrens } 471fa9e4066Sahrens 472fa9e4066Sahrens /* 473fa9e4066Sahrens * ========================================================================= 474fa9e4066Sahrens * debug printfs 475fa9e4066Sahrens * ========================================================================= 476fa9e4066Sahrens */ 477fa9e4066Sahrens void 478fa9e4066Sahrens __dprintf(const char *file, const char *func, int line, const char *fmt, ...) 479fa9e4066Sahrens { 480fa9e4066Sahrens const char *newfile; 481fa9e4066Sahrens va_list adx; 482fa9e4066Sahrens 483fa9e4066Sahrens /* 484fa9e4066Sahrens * Get rid of annoying "../common/" prefix to filename. 485fa9e4066Sahrens */ 486fa9e4066Sahrens newfile = strrchr(file, '/'); 487fa9e4066Sahrens if (newfile != NULL) { 488fa9e4066Sahrens newfile = newfile + 1; /* Get rid of leading / */ 489fa9e4066Sahrens } else { 490fa9e4066Sahrens newfile = file; 491fa9e4066Sahrens } 492fa9e4066Sahrens 493fa9e4066Sahrens if (dprintf_print_all || 494fa9e4066Sahrens dprintf_find_string(newfile) || 495fa9e4066Sahrens dprintf_find_string(func)) { 496fa9e4066Sahrens /* Print out just the function name if requested */ 497fa9e4066Sahrens flockfile(stdout); 498fa9e4066Sahrens if (dprintf_find_string("pid")) 499fa9e4066Sahrens (void) printf("%d ", getpid()); 500fa9e4066Sahrens if (dprintf_find_string("tid")) 501fa9e4066Sahrens (void) printf("%u ", thr_self()); 502fa9e4066Sahrens if (dprintf_find_string("cpu")) 503fa9e4066Sahrens (void) printf("%u ", getcpuid()); 504fa9e4066Sahrens if (dprintf_find_string("time")) 505fa9e4066Sahrens (void) printf("%llu ", gethrtime()); 506fa9e4066Sahrens if (dprintf_find_string("long")) 507fa9e4066Sahrens (void) printf("%s, line %d: ", newfile, line); 508fa9e4066Sahrens (void) printf("%s: ", func); 509fa9e4066Sahrens va_start(adx, fmt); 510fa9e4066Sahrens (void) vprintf(fmt, adx); 511fa9e4066Sahrens va_end(adx); 512fa9e4066Sahrens funlockfile(stdout); 513fa9e4066Sahrens } 514fa9e4066Sahrens } 515fa9e4066Sahrens 516fa9e4066Sahrens #endif /* ZFS_DEBUG */ 517fa9e4066Sahrens 518fa9e4066Sahrens /* 519fa9e4066Sahrens * ========================================================================= 520fa9e4066Sahrens * cmn_err() and panic() 521fa9e4066Sahrens * ========================================================================= 522fa9e4066Sahrens */ 523fa9e4066Sahrens static char ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; 524fa9e4066Sahrens static char ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; 525fa9e4066Sahrens 526fa9e4066Sahrens void 527fa9e4066Sahrens vpanic(const char *fmt, va_list adx) 528fa9e4066Sahrens { 529fa9e4066Sahrens (void) fprintf(stderr, "error: "); 530fa9e4066Sahrens (void) vfprintf(stderr, fmt, adx); 531fa9e4066Sahrens (void) fprintf(stderr, "\n"); 532fa9e4066Sahrens 533fa9e4066Sahrens abort(); /* think of it as a "user-level crash dump" */ 534fa9e4066Sahrens } 535fa9e4066Sahrens 536fa9e4066Sahrens void 537fa9e4066Sahrens panic(const char *fmt, ...) 538fa9e4066Sahrens { 539fa9e4066Sahrens va_list adx; 540fa9e4066Sahrens 541fa9e4066Sahrens va_start(adx, fmt); 542fa9e4066Sahrens vpanic(fmt, adx); 543fa9e4066Sahrens va_end(adx); 544fa9e4066Sahrens } 545fa9e4066Sahrens 546fa9e4066Sahrens /*PRINTFLIKE2*/ 547fa9e4066Sahrens void 548fa9e4066Sahrens cmn_err(int ce, const char *fmt, ...) 549fa9e4066Sahrens { 550fa9e4066Sahrens va_list adx; 551fa9e4066Sahrens 552fa9e4066Sahrens va_start(adx, fmt); 553fa9e4066Sahrens if (ce == CE_PANIC) 554fa9e4066Sahrens vpanic(fmt, adx); 555fa9e4066Sahrens if (ce != CE_NOTE) { /* suppress noise in userland stress testing */ 556fa9e4066Sahrens (void) fprintf(stderr, "%s", ce_prefix[ce]); 557fa9e4066Sahrens (void) vfprintf(stderr, fmt, adx); 558fa9e4066Sahrens (void) fprintf(stderr, "%s", ce_suffix[ce]); 559fa9e4066Sahrens } 560fa9e4066Sahrens va_end(adx); 561fa9e4066Sahrens } 562fa9e4066Sahrens 563*ea8dc4b6Seschrock /* 564*ea8dc4b6Seschrock * ========================================================================= 565*ea8dc4b6Seschrock * kobj interfaces 566*ea8dc4b6Seschrock * ========================================================================= 567*ea8dc4b6Seschrock */ 568*ea8dc4b6Seschrock struct _buf * 569*ea8dc4b6Seschrock kobj_open_file(char *name) 570*ea8dc4b6Seschrock { 571*ea8dc4b6Seschrock struct _buf *file; 572*ea8dc4b6Seschrock vnode_t *vp; 573*ea8dc4b6Seschrock 574*ea8dc4b6Seschrock /* set vp as the _fd field of the file */ 575*ea8dc4b6Seschrock if (vn_openat(name, UIO_SYSSPACE, FREAD, 0, &vp, 0, 0, rootdir) != 0) 576*ea8dc4b6Seschrock return ((void *)-1UL); 577*ea8dc4b6Seschrock 578*ea8dc4b6Seschrock file = umem_zalloc(sizeof (struct _buf), UMEM_NOFAIL); 579*ea8dc4b6Seschrock file->_fd = (intptr_t)vp; 580*ea8dc4b6Seschrock return (file); 581*ea8dc4b6Seschrock } 582*ea8dc4b6Seschrock 583*ea8dc4b6Seschrock int 584*ea8dc4b6Seschrock kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off) 585*ea8dc4b6Seschrock { 586*ea8dc4b6Seschrock ssize_t resid; 587*ea8dc4b6Seschrock 588*ea8dc4b6Seschrock vn_rdwr(UIO_READ, (vnode_t *)file->_fd, buf, size, (offset_t)off, 589*ea8dc4b6Seschrock UIO_SYSSPACE, 0, 0, 0, &resid); 590*ea8dc4b6Seschrock 591*ea8dc4b6Seschrock return (0); 592*ea8dc4b6Seschrock } 593*ea8dc4b6Seschrock 594*ea8dc4b6Seschrock void 595*ea8dc4b6Seschrock kobj_close_file(struct _buf *file) 596*ea8dc4b6Seschrock { 597*ea8dc4b6Seschrock vn_close((vnode_t *)file->_fd); 598*ea8dc4b6Seschrock umem_free(file, sizeof (struct _buf)); 599*ea8dc4b6Seschrock } 600*ea8dc4b6Seschrock 601*ea8dc4b6Seschrock int 602*ea8dc4b6Seschrock kobj_fstat(intptr_t fd, struct bootstat *bst) 603*ea8dc4b6Seschrock { 604*ea8dc4b6Seschrock struct stat64 st; 605*ea8dc4b6Seschrock vnode_t *vp = (vnode_t *)fd; 606*ea8dc4b6Seschrock if (fstat64(vp->v_fd, &st) == -1) { 607*ea8dc4b6Seschrock vn_close(vp); 608*ea8dc4b6Seschrock return (errno); 609*ea8dc4b6Seschrock } 610*ea8dc4b6Seschrock bst->st_size = (uint64_t)st.st_size; 611*ea8dc4b6Seschrock return (0); 612*ea8dc4b6Seschrock } 613*ea8dc4b6Seschrock 614fa9e4066Sahrens /* 615fa9e4066Sahrens * ========================================================================= 616fa9e4066Sahrens * misc routines 617fa9e4066Sahrens * ========================================================================= 618fa9e4066Sahrens */ 619fa9e4066Sahrens 620fa9e4066Sahrens void 621fa9e4066Sahrens delay(clock_t ticks) 622fa9e4066Sahrens { 623fa9e4066Sahrens poll(0, 0, ticks * (1000 / hz)); 624fa9e4066Sahrens } 625fa9e4066Sahrens 626fa9e4066Sahrens /* 627fa9e4066Sahrens * Find highest one bit set. 628fa9e4066Sahrens * Returns bit number + 1 of highest bit that is set, otherwise returns 0. 629fa9e4066Sahrens * High order bit is 31 (or 63 in _LP64 kernel). 630fa9e4066Sahrens */ 631fa9e4066Sahrens int 632fa9e4066Sahrens highbit(ulong_t i) 633fa9e4066Sahrens { 634fa9e4066Sahrens register int h = 1; 635fa9e4066Sahrens 636fa9e4066Sahrens if (i == 0) 637fa9e4066Sahrens return (0); 638fa9e4066Sahrens #ifdef _LP64 639fa9e4066Sahrens if (i & 0xffffffff00000000ul) { 640fa9e4066Sahrens h += 32; i >>= 32; 641fa9e4066Sahrens } 642fa9e4066Sahrens #endif 643fa9e4066Sahrens if (i & 0xffff0000) { 644fa9e4066Sahrens h += 16; i >>= 16; 645fa9e4066Sahrens } 646fa9e4066Sahrens if (i & 0xff00) { 647fa9e4066Sahrens h += 8; i >>= 8; 648fa9e4066Sahrens } 649fa9e4066Sahrens if (i & 0xf0) { 650fa9e4066Sahrens h += 4; i >>= 4; 651fa9e4066Sahrens } 652fa9e4066Sahrens if (i & 0xc) { 653fa9e4066Sahrens h += 2; i >>= 2; 654fa9e4066Sahrens } 655fa9e4066Sahrens if (i & 0x2) { 656fa9e4066Sahrens h += 1; 657fa9e4066Sahrens } 658fa9e4066Sahrens return (h); 659fa9e4066Sahrens } 660fa9e4066Sahrens 661fa9e4066Sahrens static int 662fa9e4066Sahrens random_get_bytes_common(uint8_t *ptr, size_t len, char *devname) 663fa9e4066Sahrens { 664fa9e4066Sahrens int fd = open(devname, O_RDONLY); 665fa9e4066Sahrens size_t resid = len; 666fa9e4066Sahrens ssize_t bytes; 667fa9e4066Sahrens 668fa9e4066Sahrens ASSERT(fd != -1); 669fa9e4066Sahrens 670fa9e4066Sahrens while (resid != 0) { 671fa9e4066Sahrens bytes = read(fd, ptr, resid); 672fa9e4066Sahrens ASSERT(bytes >= 0); 673fa9e4066Sahrens ptr += bytes; 674fa9e4066Sahrens resid -= bytes; 675fa9e4066Sahrens } 676fa9e4066Sahrens 677fa9e4066Sahrens close(fd); 678fa9e4066Sahrens 679fa9e4066Sahrens return (0); 680fa9e4066Sahrens } 681fa9e4066Sahrens 682fa9e4066Sahrens int 683fa9e4066Sahrens random_get_bytes(uint8_t *ptr, size_t len) 684fa9e4066Sahrens { 685fa9e4066Sahrens return (random_get_bytes_common(ptr, len, "/dev/random")); 686fa9e4066Sahrens } 687fa9e4066Sahrens 688fa9e4066Sahrens int 689fa9e4066Sahrens random_get_pseudo_bytes(uint8_t *ptr, size_t len) 690fa9e4066Sahrens { 691fa9e4066Sahrens return (random_get_bytes_common(ptr, len, "/dev/urandom")); 692fa9e4066Sahrens } 693fa9e4066Sahrens 694fa9e4066Sahrens /* 695fa9e4066Sahrens * ========================================================================= 696fa9e4066Sahrens * kernel emulation setup & teardown 697fa9e4066Sahrens * ========================================================================= 698fa9e4066Sahrens */ 699fa9e4066Sahrens static int 700fa9e4066Sahrens umem_out_of_memory(void) 701fa9e4066Sahrens { 702fa9e4066Sahrens char errmsg[] = "out of memory -- generating core dump\n"; 703fa9e4066Sahrens 704fa9e4066Sahrens write(fileno(stderr), errmsg, sizeof (errmsg)); 705fa9e4066Sahrens abort(); 706fa9e4066Sahrens return (0); 707fa9e4066Sahrens } 708fa9e4066Sahrens 709fa9e4066Sahrens void 710fa9e4066Sahrens kernel_init(int mode) 711fa9e4066Sahrens { 712fa9e4066Sahrens umem_nofail_callback(umem_out_of_memory); 713fa9e4066Sahrens 714fa9e4066Sahrens physmem = sysconf(_SC_PHYS_PAGES); 715fa9e4066Sahrens 716fa9e4066Sahrens dprintf("physmem = %llu pages (%.2f GB)\n", physmem, 717fa9e4066Sahrens (double)physmem * sysconf(_SC_PAGE_SIZE) / (1ULL << 30)); 718fa9e4066Sahrens 719fa9e4066Sahrens spa_init(mode); 720fa9e4066Sahrens } 721fa9e4066Sahrens 722fa9e4066Sahrens void 723fa9e4066Sahrens kernel_fini(void) 724fa9e4066Sahrens { 725fa9e4066Sahrens spa_fini(); 726fa9e4066Sahrens } 727