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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_ZFS_CONTEXT_H 28 #define _SYS_ZFS_CONTEXT_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #define _SYS_MUTEX_H 37 #define _SYS_RWLOCK_H 38 #define _SYS_CONDVAR_H 39 #define _SYS_SYSTM_H 40 #define _SYS_DEBUG_H 41 #define _SYS_T_LOCK_H 42 #define _SYS_VNODE_H 43 #define _SYS_VFS_H 44 #define _SYS_SUNDDI_H 45 #define _SYS_CALLB_H 46 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <stddef.h> 50 #include <stdarg.h> 51 #include <fcntl.h> 52 #include <unistd.h> 53 #include <errno.h> 54 #include <string.h> 55 #include <strings.h> 56 #include <synch.h> 57 #include <thread.h> 58 #include <assert.h> 59 #include <alloca.h> 60 #include <umem.h> 61 #include <limits.h> 62 #include <atomic.h> 63 #include <dirent.h> 64 #include <time.h> 65 #include <sys/note.h> 66 #include <sys/types.h> 67 #include <sys/sysmacros.h> 68 #include <sys/bitmap.h> 69 #include <sys/resource.h> 70 #include <sys/byteorder.h> 71 #include <sys/list.h> 72 #include <sys/uio.h> 73 #include <sys/zfs_debug.h> 74 #include <sys/sdt.h> 75 76 /* 77 * Debugging 78 */ 79 80 /* 81 * Note that we are not using the debugging levels. 82 */ 83 84 #define CE_CONT 0 /* continuation */ 85 #define CE_NOTE 1 /* notice */ 86 #define CE_WARN 2 /* warning */ 87 #define CE_PANIC 3 /* panic */ 88 #define CE_IGNORE 4 /* print nothing */ 89 90 /* 91 * ZFS debugging 92 */ 93 94 #ifdef ZFS_DEBUG 95 extern void dprintf_setup(int *argc, char **argv); 96 #endif /* ZFS_DEBUG */ 97 98 extern void cmn_err(int, const char *, ...); 99 extern void panic(const char *, ...); 100 extern void vpanic(const char *, __va_list); 101 102 /* This definition is copied from assert.h. */ 103 #if defined(__STDC__) 104 #if __STDC_VERSION__ - 0 >= 199901L 105 #define verify(EX) (void)((EX) || \ 106 (__assert_c99(#EX, __FILE__, __LINE__, __func__), 0)) 107 #else 108 #define verify(EX) (void)((EX) || (__assert(#EX, __FILE__, __LINE__), 0)) 109 #endif /* __STDC_VERSION__ - 0 >= 199901L */ 110 #else 111 #define verify(EX) (void)((EX) || (_assert("EX", __FILE__, __LINE__), 0)) 112 #endif /* __STDC__ */ 113 114 115 #define VERIFY verify 116 #define ASSERT assert 117 118 extern void __assert(const char *, const char *, int); 119 120 #ifdef lint 121 #define VERIFY3_IMPL(x, y, z, t) if (x == z) ((void)0) 122 #else 123 /* BEGIN CSTYLED */ 124 #define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \ 125 const TYPE __left = (TYPE)(LEFT); \ 126 const TYPE __right = (TYPE)(RIGHT); \ 127 if (!(__left OP __right)) { \ 128 char *__buf = alloca(256); \ 129 (void) snprintf(__buf, 256, "%s %s %s (0x%llx %s 0x%llx)", \ 130 #LEFT, #OP, #RIGHT, \ 131 (u_longlong_t)__left, #OP, (u_longlong_t)__right); \ 132 __assert(__buf, __FILE__, __LINE__); \ 133 } \ 134 _NOTE(CONSTCOND) } while (0) 135 /* END CSTYLED */ 136 #endif /* lint */ 137 138 #define VERIFY3S(x, y, z) VERIFY3_IMPL(x, y, z, int64_t) 139 #define VERIFY3U(x, y, z) VERIFY3_IMPL(x, y, z, uint64_t) 140 #define VERIFY3P(x, y, z) VERIFY3_IMPL(x, y, z, uintptr_t) 141 142 #ifdef NDEBUG 143 #define ASSERT3S(x, y, z) ((void)0) 144 #define ASSERT3U(x, y, z) ((void)0) 145 #define ASSERT3P(x, y, z) ((void)0) 146 #else 147 #define ASSERT3S(x, y, z) VERIFY3S(x, y, z) 148 #define ASSERT3U(x, y, z) VERIFY3U(x, y, z) 149 #define ASSERT3P(x, y, z) VERIFY3P(x, y, z) 150 #endif 151 152 /* 153 * Dtrace SDT probes have different signatures in userland than they do in 154 * kernel. If they're being used in kernel code, re-define them out of 155 * existence for their counterparts in libzpool. 156 */ 157 158 #ifdef DTRACE_PROBE1 159 #undef DTRACE_PROBE1 160 #define DTRACE_PROBE1(a, b, c) ((void)0) 161 #endif /* DTRACE_PROBE1 */ 162 163 #ifdef DTRACE_PROBE2 164 #undef DTRACE_PROBE2 165 #define DTRACE_PROBE2(a, b, c, d, e) ((void)0) 166 #endif /* DTRACE_PROBE2 */ 167 168 /* 169 * Threads 170 */ 171 #define curthread ((void *)(uintptr_t)thr_self()) 172 173 typedef struct kthread kthread_t; 174 175 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 176 zk_thread_create(func, arg) 177 #define thread_exit() thr_exit(0) 178 179 extern kthread_t *zk_thread_create(void (*func)(), void *arg); 180 181 #define issig(why) (FALSE) 182 #define ISSIG(thr, why) (FALSE) 183 184 /* 185 * Mutexes 186 */ 187 typedef struct kmutex { 188 void *m_owner; 189 mutex_t m_lock; 190 } kmutex_t; 191 192 #define MUTEX_DEFAULT USYNC_THREAD 193 #undef MUTEX_HELD 194 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock) 195 196 /* 197 * Argh -- we have to get cheesy here because the kernel and userland 198 * have different signatures for the same routine. 199 */ 200 extern int _mutex_init(mutex_t *mp, int type, void *arg); 201 extern int _mutex_destroy(mutex_t *mp); 202 203 #define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp)) 204 #define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp)) 205 206 extern void zmutex_init(kmutex_t *mp); 207 extern void zmutex_destroy(kmutex_t *mp); 208 extern void mutex_enter(kmutex_t *mp); 209 extern void mutex_exit(kmutex_t *mp); 210 extern int mutex_tryenter(kmutex_t *mp); 211 extern void *mutex_owner(kmutex_t *mp); 212 213 /* 214 * RW locks 215 */ 216 typedef struct krwlock { 217 void *rw_owner; 218 rwlock_t rw_lock; 219 } krwlock_t; 220 221 typedef int krw_t; 222 223 #define RW_READER 0 224 #define RW_WRITER 1 225 #define RW_DEFAULT USYNC_THREAD 226 227 #undef RW_READ_HELD 228 #define RW_READ_HELD(x) _rw_read_held(&(x)->rw_lock) 229 230 #undef RW_WRITE_HELD 231 #define RW_WRITE_HELD(x) _rw_write_held(&(x)->rw_lock) 232 233 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 234 extern void rw_destroy(krwlock_t *rwlp); 235 extern void rw_enter(krwlock_t *rwlp, krw_t rw); 236 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 237 extern int rw_tryupgrade(krwlock_t *rwlp); 238 extern void rw_exit(krwlock_t *rwlp); 239 #define rw_downgrade(rwlp) do { } while (0) 240 241 /* 242 * Condition variables 243 */ 244 typedef cond_t kcondvar_t; 245 246 #define CV_DEFAULT USYNC_THREAD 247 248 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 249 extern void cv_destroy(kcondvar_t *cv); 250 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 251 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 252 extern void cv_signal(kcondvar_t *cv); 253 extern void cv_broadcast(kcondvar_t *cv); 254 255 /* 256 * Kernel memory 257 */ 258 #define KM_SLEEP UMEM_NOFAIL 259 #define KM_NOSLEEP UMEM_DEFAULT 260 #define KMC_NODEBUG UMC_NODEBUG 261 #define kmem_alloc(_s, _f) umem_alloc(_s, _f) 262 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 263 #define kmem_free(_b, _s) umem_free(_b, _s) 264 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 265 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 266 #define kmem_cache_destroy(_c) umem_cache_destroy(_c) 267 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 268 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 269 #define kmem_debugging() 0 270 #define kmem_cache_reap_now(c) 271 272 typedef umem_cache_t kmem_cache_t; 273 274 /* 275 * Task queues 276 */ 277 typedef struct taskq taskq_t; 278 typedef uintptr_t taskqid_t; 279 typedef void (task_func_t)(void *); 280 281 #define TASKQ_PREPOPULATE 0x0001 282 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 283 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 284 285 #define TQ_SLEEP KM_SLEEP /* Can block for memory */ 286 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 287 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 288 289 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 290 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 291 extern void taskq_destroy(taskq_t *); 292 extern void taskq_wait(taskq_t *); 293 extern int taskq_member(taskq_t *, void *); 294 295 /* 296 * vnodes 297 */ 298 typedef struct vnode { 299 uint64_t v_size; 300 int v_fd; 301 char *v_path; 302 } vnode_t; 303 304 typedef struct vattr { 305 uint_t va_mask; /* bit-mask of attributes */ 306 u_offset_t va_size; /* file size in bytes */ 307 } vattr_t; 308 309 #define AT_TYPE 0x0001 310 #define AT_MODE 0x0002 311 #define AT_UID 0x0004 312 #define AT_GID 0x0008 313 #define AT_FSID 0x0010 314 #define AT_NODEID 0x0020 315 #define AT_NLINK 0x0040 316 #define AT_SIZE 0x0080 317 #define AT_ATIME 0x0100 318 #define AT_MTIME 0x0200 319 #define AT_CTIME 0x0400 320 #define AT_RDEV 0x0800 321 #define AT_BLKSIZE 0x1000 322 #define AT_NBLOCKS 0x2000 323 #define AT_SEQ 0x8000 324 325 #define CRCREAT 0 326 327 #define VOP_CLOSE(vp, f, c, o, cr) 0 328 #define VOP_PUTPAGE(vp, of, sz, fl, cr) 0 329 #define VOP_GETATTR(vp, vap, fl, cr) ((vap)->va_size = (vp)->v_size, 0) 330 331 #define VOP_FSYNC(vp, f, cr) fsync((vp)->v_fd) 332 333 #define VN_RELE(vp) vn_close(vp) 334 335 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp, 336 int x2, int x3); 337 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp, 338 int x2, int x3, vnode_t *vp); 339 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, 340 offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp); 341 extern void vn_close(vnode_t *vp); 342 343 #define vn_remove(path, x1, x2) remove(path) 344 #define vn_rename(from, to, seg) rename((from), (to)) 345 346 extern vnode_t *rootdir; 347 348 #include <sys/file.h> /* for FREAD, FWRITE, etc */ 349 350 /* 351 * Random stuff 352 */ 353 #define lbolt (gethrtime() >> 23) 354 #define lbolt64 (gethrtime() >> 23) 355 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 356 357 extern void delay(clock_t ticks); 358 359 #define gethrestime_sec() time(NULL) 360 361 #define max_ncpus 64 362 363 #define minclsyspri 60 364 #define maxclsyspri 99 365 366 #define CPU_SEQID (thr_self() & (max_ncpus - 1)) 367 368 #define kcred NULL 369 #define CRED() NULL 370 371 extern uint64_t physmem; 372 373 extern int highbit(ulong_t i); 374 extern int random_get_bytes(uint8_t *ptr, size_t len); 375 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 376 377 extern void kernel_init(int); 378 extern void kernel_fini(void); 379 380 struct spa; 381 extern void nicenum(uint64_t num, char *buf); 382 extern void show_pool_stats(struct spa *); 383 384 typedef struct callb_cpr { 385 kmutex_t *cc_lockp; 386 } callb_cpr_t; 387 388 #define CALLB_CPR_INIT(cp, lockp, func, name) { \ 389 (cp)->cc_lockp = lockp; \ 390 } 391 392 #define CALLB_CPR_SAFE_BEGIN(cp) { \ 393 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 394 } 395 396 #define CALLB_CPR_SAFE_END(cp, lockp) { \ 397 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 398 } 399 400 #define CALLB_CPR_EXIT(cp) { \ 401 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 402 mutex_exit((cp)->cc_lockp); \ 403 } 404 405 #define zone_dataset_visible(x, y) (1) 406 #define INGLOBALZONE(z) (1) 407 408 #ifdef __cplusplus 409 } 410 #endif 411 412 #endif /* _SYS_ZFS_CONTEXT_H */ 413