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 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_ZFS_CONTEXT_H 27 #define _SYS_ZFS_CONTEXT_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 #define _SYS_MUTEX_H 36 #define _SYS_RWLOCK_H 37 #define _SYS_CONDVAR_H 38 #define _SYS_SYSTM_H 39 #define _SYS_DEBUG_H 40 #define _SYS_T_LOCK_H 41 #define _SYS_VNODE_H 42 #define _SYS_VFS_H 43 #define _SYS_SUNDDI_H 44 #define _SYS_CALLB_H 45 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <stddef.h> 49 #include <stdarg.h> 50 #include <fcntl.h> 51 #include <unistd.h> 52 #include <errno.h> 53 #include <string.h> 54 #include <strings.h> 55 #include <synch.h> 56 #include <thread.h> 57 #include <assert.h> 58 #include <alloca.h> 59 #include <umem.h> 60 #include <limits.h> 61 #include <atomic.h> 62 #include <dirent.h> 63 #include <time.h> 64 #include <sys/note.h> 65 #include <sys/types.h> 66 #include <sys/sysmacros.h> 67 #include <sys/bitmap.h> 68 #include <sys/resource.h> 69 #include <sys/byteorder.h> 70 #include <sys/list.h> 71 #include <sys/uio.h> 72 #include <sys/zfs_debug.h> 73 #include <sys/sdt.h> 74 #include <sys/kstat.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 #ifdef DTRACE_PROBE3 169 #undef DTRACE_PROBE3 170 #define DTRACE_PROBE3(a, b, c, d, e, f, g) ((void)0) 171 #endif /* DTRACE_PROBE3 */ 172 173 #ifdef DTRACE_PROBE4 174 #undef DTRACE_PROBE4 175 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) ((void)0) 176 #endif /* DTRACE_PROBE4 */ 177 178 /* 179 * Threads 180 */ 181 #define curthread ((void *)(uintptr_t)thr_self()) 182 183 typedef struct kthread kthread_t; 184 185 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 186 zk_thread_create(func, arg) 187 #define thread_exit() thr_exit(NULL) 188 189 extern kthread_t *zk_thread_create(void (*func)(), void *arg); 190 191 #define issig(why) (FALSE) 192 #define ISSIG(thr, why) (FALSE) 193 194 /* 195 * Mutexes 196 */ 197 typedef struct kmutex { 198 void *m_owner; 199 mutex_t m_lock; 200 } kmutex_t; 201 202 #define MUTEX_DEFAULT USYNC_THREAD 203 #undef MUTEX_HELD 204 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock) 205 206 /* 207 * Argh -- we have to get cheesy here because the kernel and userland 208 * have different signatures for the same routine. 209 */ 210 extern int _mutex_init(mutex_t *mp, int type, void *arg); 211 extern int _mutex_destroy(mutex_t *mp); 212 213 #define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp)) 214 #define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp)) 215 216 extern void zmutex_init(kmutex_t *mp); 217 extern void zmutex_destroy(kmutex_t *mp); 218 extern void mutex_enter(kmutex_t *mp); 219 extern void mutex_exit(kmutex_t *mp); 220 extern int mutex_tryenter(kmutex_t *mp); 221 extern void *mutex_owner(kmutex_t *mp); 222 223 /* 224 * RW locks 225 */ 226 typedef struct krwlock { 227 void *rw_owner; 228 rwlock_t rw_lock; 229 } krwlock_t; 230 231 typedef int krw_t; 232 233 #define RW_READER 0 234 #define RW_WRITER 1 235 #define RW_DEFAULT USYNC_THREAD 236 237 #undef RW_READ_HELD 238 #define RW_READ_HELD(x) _rw_read_held(&(x)->rw_lock) 239 240 #undef RW_WRITE_HELD 241 #define RW_WRITE_HELD(x) _rw_write_held(&(x)->rw_lock) 242 243 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 244 extern void rw_destroy(krwlock_t *rwlp); 245 extern void rw_enter(krwlock_t *rwlp, krw_t rw); 246 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 247 extern int rw_tryupgrade(krwlock_t *rwlp); 248 extern void rw_exit(krwlock_t *rwlp); 249 #define rw_downgrade(rwlp) do { } while (0) 250 251 /* 252 * Condition variables 253 */ 254 typedef cond_t kcondvar_t; 255 256 #define CV_DEFAULT USYNC_THREAD 257 258 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 259 extern void cv_destroy(kcondvar_t *cv); 260 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 261 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 262 extern void cv_signal(kcondvar_t *cv); 263 extern void cv_broadcast(kcondvar_t *cv); 264 265 /* 266 * kstat creation, installation and deletion 267 */ 268 extern kstat_t *kstat_create(char *, int, 269 char *, char *, uchar_t, ulong_t, uchar_t); 270 extern void kstat_install(kstat_t *); 271 extern void kstat_delete(kstat_t *); 272 273 /* 274 * Kernel memory 275 */ 276 #define KM_SLEEP UMEM_NOFAIL 277 #define KM_NOSLEEP UMEM_DEFAULT 278 #define KMC_NODEBUG UMC_NODEBUG 279 #define kmem_alloc(_s, _f) umem_alloc(_s, _f) 280 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 281 #define kmem_free(_b, _s) umem_free(_b, _s) 282 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 283 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 284 #define kmem_cache_destroy(_c) umem_cache_destroy(_c) 285 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 286 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 287 #define kmem_debugging() 0 288 #define kmem_cache_reap_now(c) 289 290 typedef umem_cache_t kmem_cache_t; 291 292 /* 293 * Task queues 294 */ 295 typedef struct taskq taskq_t; 296 typedef uintptr_t taskqid_t; 297 typedef void (task_func_t)(void *); 298 299 #define TASKQ_PREPOPULATE 0x0001 300 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 301 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 302 303 #define TQ_SLEEP KM_SLEEP /* Can block for memory */ 304 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 305 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 306 307 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 308 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 309 extern void taskq_destroy(taskq_t *); 310 extern void taskq_wait(taskq_t *); 311 extern int taskq_member(taskq_t *, void *); 312 313 /* 314 * vnodes 315 */ 316 typedef struct vnode { 317 uint64_t v_size; 318 int v_fd; 319 char *v_path; 320 } vnode_t; 321 322 typedef struct vattr { 323 uint_t va_mask; /* bit-mask of attributes */ 324 u_offset_t va_size; /* file size in bytes */ 325 } vattr_t; 326 327 #define AT_TYPE 0x0001 328 #define AT_MODE 0x0002 329 #define AT_UID 0x0004 330 #define AT_GID 0x0008 331 #define AT_FSID 0x0010 332 #define AT_NODEID 0x0020 333 #define AT_NLINK 0x0040 334 #define AT_SIZE 0x0080 335 #define AT_ATIME 0x0100 336 #define AT_MTIME 0x0200 337 #define AT_CTIME 0x0400 338 #define AT_RDEV 0x0800 339 #define AT_BLKSIZE 0x1000 340 #define AT_NBLOCKS 0x2000 341 #define AT_SEQ 0x8000 342 343 #define CRCREAT 0 344 345 #define VOP_CLOSE(vp, f, c, o, cr) 0 346 #define VOP_PUTPAGE(vp, of, sz, fl, cr) 0 347 #define VOP_GETATTR(vp, vap, fl, cr) ((vap)->va_size = (vp)->v_size, 0) 348 349 #define VOP_FSYNC(vp, f, cr) fsync((vp)->v_fd) 350 351 #define VN_RELE(vp) vn_close(vp) 352 353 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp, 354 int x2, int x3); 355 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp, 356 int x2, int x3, vnode_t *vp); 357 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, 358 offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp); 359 extern void vn_close(vnode_t *vp); 360 361 #define vn_remove(path, x1, x2) remove(path) 362 #define vn_rename(from, to, seg) rename((from), (to)) 363 #define vn_is_readonly(vp) B_FALSE 364 365 extern vnode_t *rootdir; 366 367 #include <sys/file.h> /* for FREAD, FWRITE, etc */ 368 369 /* 370 * Random stuff 371 */ 372 #define lbolt (gethrtime() >> 23) 373 #define lbolt64 (gethrtime() >> 23) 374 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 375 376 extern void delay(clock_t ticks); 377 378 #define gethrestime_sec() time(NULL) 379 380 #define max_ncpus 64 381 382 #define minclsyspri 60 383 #define maxclsyspri 99 384 385 #define CPU_SEQID (thr_self() & (max_ncpus - 1)) 386 387 #define kcred NULL 388 #define CRED() NULL 389 390 extern uint64_t physmem; 391 392 extern int highbit(ulong_t i); 393 extern int random_get_bytes(uint8_t *ptr, size_t len); 394 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 395 396 extern void kernel_init(int); 397 extern void kernel_fini(void); 398 399 struct spa; 400 extern void nicenum(uint64_t num, char *buf); 401 extern void show_pool_stats(struct spa *); 402 403 typedef struct callb_cpr { 404 kmutex_t *cc_lockp; 405 } callb_cpr_t; 406 407 #define CALLB_CPR_INIT(cp, lockp, func, name) { \ 408 (cp)->cc_lockp = lockp; \ 409 } 410 411 #define CALLB_CPR_SAFE_BEGIN(cp) { \ 412 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 413 } 414 415 #define CALLB_CPR_SAFE_END(cp, lockp) { \ 416 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 417 } 418 419 #define CALLB_CPR_EXIT(cp) { \ 420 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 421 mutex_exit((cp)->cc_lockp); \ 422 } 423 424 #define zone_dataset_visible(x, y) (1) 425 #define INGLOBALZONE(z) (1) 426 427 #ifdef __cplusplus 428 } 429 #endif 430 431 /* ZFS Boot Related stuff. */ 432 433 struct _buf { 434 intptr_t _fd; 435 }; 436 437 struct bootstat { 438 uint64_t st_size; 439 }; 440 441 extern struct _buf *kobj_open_file(char *name); 442 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size, 443 unsigned off); 444 extern void kobj_close_file(struct _buf *file); 445 extern int kobj_fstat(intptr_t, struct bootstat *); 446 447 448 #endif /* _SYS_ZFS_CONTEXT_H */ 449