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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 * Copyright (c) 2012, 2018 by Delphix. All rights reserved. 25 * Copyright (c) 2012, Joyent, Inc. All rights reserved. 26 */ 27 28 #ifndef _SYS_ZFS_CONTEXT_H 29 #define _SYS_ZFS_CONTEXT_H 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 /* 36 * This code compiles in three different contexts. When __KERNEL__ is defined, 37 * the code uses "unix-like" kernel interfaces. When _STANDALONE is defined, the 38 * code is running in a reduced capacity environment of the boot loader which is 39 * generally a subset of both POSIX and kernel interfaces (with a few unique 40 * interfaces too). When neither are defined, it's in a userland POSIX or 41 * similar environment. 42 */ 43 #if defined(__KERNEL__) || defined(_STANDALONE) 44 #include <sys/types.h> 45 #include <sys/atomic.h> 46 #include <sys/sysmacros.h> 47 #include <sys/vmsystm.h> 48 #include <sys/condvar.h> 49 #include <sys/cmn_err.h> 50 #include <sys/kmem.h> 51 #include <sys/kmem_cache.h> 52 #include <sys/vmem.h> 53 #include <sys/taskq.h> 54 #include <sys/param.h> 55 #include <sys/disp.h> 56 #include <sys/debug.h> 57 #include <sys/random.h> 58 #include <sys/strings.h> 59 #include <sys/byteorder.h> 60 #include <sys/list.h> 61 #include <sys/time.h> 62 #include <sys/zone.h> 63 #include <sys/kstat.h> 64 #include <sys/zfs_debug.h> 65 #include <sys/sysevent.h> 66 #include <sys/sysevent/eventdefs.h> 67 #include <sys/zfs_delay.h> 68 #include <sys/sunddi.h> 69 #include <sys/ctype.h> 70 #include <sys/disp.h> 71 #include <sys/trace.h> 72 #include <sys/procfs_list.h> 73 #include <sys/mod.h> 74 #include <sys/uio_impl.h> 75 #include <sys/zfs_context_os.h> 76 #else /* _KERNEL || _STANDALONE */ 77 78 #define _SYS_MUTEX_H 79 #define _SYS_RWLOCK_H 80 #define _SYS_CONDVAR_H 81 #define _SYS_VNODE_H 82 #define _SYS_VFS_H 83 #define _SYS_SUNDDI_H 84 #define _SYS_CALLB_H 85 86 #include <stdio.h> 87 #include <stdlib.h> 88 #include <stddef.h> 89 #include <stdarg.h> 90 #include <fcntl.h> 91 #include <unistd.h> 92 #include <errno.h> 93 #include <string.h> 94 #include <strings.h> 95 #include <pthread.h> 96 #include <setjmp.h> 97 #include <assert.h> 98 #include <umem.h> 99 #include <limits.h> 100 #include <atomic.h> 101 #include <dirent.h> 102 #include <time.h> 103 #include <ctype.h> 104 #include <signal.h> 105 #include <sys/mman.h> 106 #include <sys/types.h> 107 #include <sys/cred.h> 108 #include <sys/sysmacros.h> 109 #include <sys/resource.h> 110 #include <sys/byteorder.h> 111 #include <sys/list.h> 112 #include <sys/mod.h> 113 #include <sys/uio.h> 114 #include <sys/zfs_debug.h> 115 #include <sys/kstat.h> 116 #include <sys/u8_textprep.h> 117 #include <sys/sysevent.h> 118 #include <sys/sysevent/eventdefs.h> 119 #include <sys/sunddi.h> 120 #include <sys/debug.h> 121 #include <sys/utsname.h> 122 #include <sys/trace_zfs.h> 123 124 #include <sys/zfs_context_os.h> 125 126 /* 127 * Stack 128 */ 129 130 #define noinline __attribute__((noinline)) 131 #define likely(x) __builtin_expect((x), 1) 132 #define unlikely(x) __builtin_expect((x), 0) 133 134 /* 135 * Debugging 136 */ 137 138 /* 139 * Note that we are not using the debugging levels. 140 */ 141 142 #define CE_CONT 0 /* continuation */ 143 #define CE_NOTE 1 /* notice */ 144 #define CE_WARN 2 /* warning */ 145 #define CE_PANIC 3 /* panic */ 146 #define CE_IGNORE 4 /* print nothing */ 147 148 /* 149 * ZFS debugging 150 */ 151 152 extern void dprintf_setup(int *argc, char **argv); 153 154 extern void cmn_err(int, const char *, ...); 155 extern void vcmn_err(int, const char *, va_list); 156 extern void panic(const char *, ...) __NORETURN; 157 extern void vpanic(const char *, va_list) __NORETURN; 158 159 #define fm_panic panic 160 161 /* 162 * DTrace SDT probes have different signatures in userland than they do in 163 * the kernel. If they're being used in kernel code, re-define them out of 164 * existence for their counterparts in libzpool. 165 * 166 * Here's an example of how to use the set-error probes in userland: 167 * zfs$target:::set-error /arg0 == EBUSY/ {stack();} 168 * 169 * Here's an example of how to use DTRACE_PROBE probes in userland: 170 * If there is a probe declared as follows: 171 * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn); 172 * Then you can use it as follows: 173 * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/ 174 * {printf("%u %p\n", arg1, arg2);} 175 */ 176 177 #ifdef DTRACE_PROBE 178 #undef DTRACE_PROBE 179 #endif /* DTRACE_PROBE */ 180 #define DTRACE_PROBE(a) 181 182 #ifdef DTRACE_PROBE1 183 #undef DTRACE_PROBE1 184 #endif /* DTRACE_PROBE1 */ 185 #define DTRACE_PROBE1(a, b, c) 186 187 #ifdef DTRACE_PROBE2 188 #undef DTRACE_PROBE2 189 #endif /* DTRACE_PROBE2 */ 190 #define DTRACE_PROBE2(a, b, c, d, e) 191 192 #ifdef DTRACE_PROBE3 193 #undef DTRACE_PROBE3 194 #endif /* DTRACE_PROBE3 */ 195 #define DTRACE_PROBE3(a, b, c, d, e, f, g) 196 197 #ifdef DTRACE_PROBE4 198 #undef DTRACE_PROBE4 199 #endif /* DTRACE_PROBE4 */ 200 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) 201 202 /* 203 * Tunables. 204 */ 205 typedef struct zfs_kernel_param { 206 const char *name; /* unused stub */ 207 } zfs_kernel_param_t; 208 209 #define ZFS_MODULE_PARAM(scope_prefix, name_prefix, name, type, perm, desc) 210 #define ZFS_MODULE_PARAM_ARGS void 211 #define ZFS_MODULE_PARAM_CALL(scope_prefix, name_prefix, name, setfunc, \ 212 getfunc, perm, desc) 213 214 /* 215 * Threads. 216 */ 217 typedef pthread_t kthread_t; 218 219 #define TS_RUN 0x00000002 220 #define TS_JOINABLE 0x00000004 221 222 #define curthread ((void *)(uintptr_t)pthread_self()) 223 #define kpreempt(x) yield() 224 #define getcomm() "unknown" 225 226 #define thread_create_named(name, stk, stksize, func, arg, len, \ 227 pp, state, pri) \ 228 zk_thread_create(func, arg, stksize, state) 229 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 230 zk_thread_create(func, arg, stksize, state) 231 #define thread_exit() pthread_exit(NULL) 232 #define thread_join(t) pthread_join((pthread_t)(t), NULL) 233 234 #define newproc(f, a, cid, pri, ctp, pid) (ENOSYS) 235 236 /* in libzpool, p0 exists only to have its address taken */ 237 typedef struct proc { 238 uintptr_t this_is_never_used_dont_dereference_it; 239 } proc_t; 240 241 extern struct proc p0; 242 #define curproc (&p0) 243 244 #define PS_NONE -1 245 246 extern kthread_t *zk_thread_create(void (*func)(void *), void *arg, 247 size_t stksize, int state); 248 249 #define issig(why) (FALSE) 250 #define ISSIG(thr, why) (FALSE) 251 252 #define kpreempt_disable() ((void)0) 253 #define kpreempt_enable() ((void)0) 254 #define cond_resched() sched_yield() 255 256 /* 257 * Mutexes 258 */ 259 typedef struct kmutex { 260 pthread_mutex_t m_lock; 261 pthread_t m_owner; 262 } kmutex_t; 263 264 #define MUTEX_DEFAULT 0 265 #define MUTEX_NOLOCKDEP MUTEX_DEFAULT 266 #define MUTEX_HELD(mp) pthread_equal((mp)->m_owner, pthread_self()) 267 #define MUTEX_NOT_HELD(mp) !MUTEX_HELD(mp) 268 269 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie); 270 extern void mutex_destroy(kmutex_t *mp); 271 extern void mutex_enter(kmutex_t *mp); 272 extern void mutex_exit(kmutex_t *mp); 273 extern int mutex_tryenter(kmutex_t *mp); 274 275 #define NESTED_SINGLE 1 276 #define mutex_enter_nested(mp, class) mutex_enter(mp) 277 /* 278 * RW locks 279 */ 280 typedef struct krwlock { 281 pthread_rwlock_t rw_lock; 282 pthread_t rw_owner; 283 uint_t rw_readers; 284 } krwlock_t; 285 286 typedef int krw_t; 287 288 #define RW_READER 0 289 #define RW_WRITER 1 290 #define RW_DEFAULT RW_READER 291 #define RW_NOLOCKDEP RW_READER 292 293 #define RW_READ_HELD(rw) ((rw)->rw_readers > 0) 294 #define RW_WRITE_HELD(rw) pthread_equal((rw)->rw_owner, pthread_self()) 295 #define RW_LOCK_HELD(rw) (RW_READ_HELD(rw) || RW_WRITE_HELD(rw)) 296 297 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 298 extern void rw_destroy(krwlock_t *rwlp); 299 extern void rw_enter(krwlock_t *rwlp, krw_t rw); 300 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 301 extern int rw_tryupgrade(krwlock_t *rwlp); 302 extern void rw_exit(krwlock_t *rwlp); 303 #define rw_downgrade(rwlp) do { } while (0) 304 305 /* 306 * Credentials 307 */ 308 extern uid_t crgetuid(cred_t *cr); 309 extern uid_t crgetruid(cred_t *cr); 310 extern gid_t crgetgid(cred_t *cr); 311 extern int crgetngroups(cred_t *cr); 312 extern gid_t *crgetgroups(cred_t *cr); 313 314 /* 315 * Condition variables 316 */ 317 typedef pthread_cond_t kcondvar_t; 318 319 #define CV_DEFAULT 0 320 #define CALLOUT_FLAG_ABSOLUTE 0x2 321 322 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 323 extern void cv_destroy(kcondvar_t *cv); 324 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 325 extern int cv_wait_sig(kcondvar_t *cv, kmutex_t *mp); 326 extern int cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 327 extern int cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim, 328 hrtime_t res, int flag); 329 extern void cv_signal(kcondvar_t *cv); 330 extern void cv_broadcast(kcondvar_t *cv); 331 332 #define cv_timedwait_io(cv, mp, at) cv_timedwait(cv, mp, at) 333 #define cv_timedwait_idle(cv, mp, at) cv_timedwait(cv, mp, at) 334 #define cv_timedwait_sig(cv, mp, at) cv_timedwait(cv, mp, at) 335 #define cv_wait_io(cv, mp) cv_wait(cv, mp) 336 #define cv_wait_idle(cv, mp) cv_wait(cv, mp) 337 #define cv_wait_io_sig(cv, mp) cv_wait_sig(cv, mp) 338 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \ 339 cv_timedwait_hires(cv, mp, t, r, f) 340 #define cv_timedwait_idle_hires(cv, mp, t, r, f) \ 341 cv_timedwait_hires(cv, mp, t, r, f) 342 343 /* 344 * Thread-specific data 345 */ 346 #define tsd_get(k) pthread_getspecific(k) 347 #define tsd_set(k, v) pthread_setspecific(k, v) 348 #define tsd_create(kp, d) pthread_key_create((pthread_key_t *)kp, d) 349 #define tsd_destroy(kp) /* nothing */ 350 #ifdef __FreeBSD__ 351 typedef off_t loff_t; 352 #endif 353 354 /* 355 * kstat creation, installation and deletion 356 */ 357 extern kstat_t *kstat_create(const char *, int, 358 const char *, const char *, uchar_t, ulong_t, uchar_t); 359 extern void kstat_install(kstat_t *); 360 extern void kstat_delete(kstat_t *); 361 extern void kstat_set_raw_ops(kstat_t *ksp, 362 int (*headers)(char *buf, size_t size), 363 int (*data)(char *buf, size_t size, void *data), 364 void *(*addr)(kstat_t *ksp, loff_t index)); 365 366 /* 367 * procfs list manipulation 368 */ 369 370 typedef struct procfs_list { 371 void *pl_private; 372 kmutex_t pl_lock; 373 list_t pl_list; 374 uint64_t pl_next_id; 375 size_t pl_node_offset; 376 } procfs_list_t; 377 378 #ifndef __cplusplus 379 struct seq_file { }; 380 void seq_printf(struct seq_file *m, const char *fmt, ...); 381 382 typedef struct procfs_list_node { 383 list_node_t pln_link; 384 uint64_t pln_id; 385 } procfs_list_node_t; 386 387 void procfs_list_install(const char *module, 388 const char *submodule, 389 const char *name, 390 mode_t mode, 391 procfs_list_t *procfs_list, 392 int (*show)(struct seq_file *f, void *p), 393 int (*show_header)(struct seq_file *f), 394 int (*clear)(procfs_list_t *procfs_list), 395 size_t procfs_list_node_off); 396 void procfs_list_uninstall(procfs_list_t *procfs_list); 397 void procfs_list_destroy(procfs_list_t *procfs_list); 398 void procfs_list_add(procfs_list_t *procfs_list, void *p); 399 #endif 400 401 /* 402 * Kernel memory 403 */ 404 #define KM_SLEEP UMEM_NOFAIL 405 #define KM_PUSHPAGE KM_SLEEP 406 #define KM_NOSLEEP UMEM_DEFAULT 407 #define KM_NORMALPRI 0 /* not needed with UMEM_DEFAULT */ 408 #define KMC_NODEBUG UMC_NODEBUG 409 #define KMC_KVMEM 0x0 410 #define kmem_alloc(_s, _f) umem_alloc(_s, _f) 411 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 412 #define kmem_free(_b, _s) umem_free(_b, _s) 413 #define vmem_alloc(_s, _f) kmem_alloc(_s, _f) 414 #define vmem_zalloc(_s, _f) kmem_zalloc(_s, _f) 415 #define vmem_free(_b, _s) kmem_free(_b, _s) 416 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 417 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 418 #define kmem_cache_destroy(_c) umem_cache_destroy(_c) 419 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 420 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 421 #define kmem_debugging() 0 422 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c); 423 #define kmem_cache_set_move(_c, _cb) /* nothing */ 424 #define POINTER_INVALIDATE(_pp) /* nothing */ 425 #define POINTER_IS_VALID(_p) 0 426 427 typedef umem_cache_t kmem_cache_t; 428 429 typedef enum kmem_cbrc { 430 KMEM_CBRC_YES, 431 KMEM_CBRC_NO, 432 KMEM_CBRC_LATER, 433 KMEM_CBRC_DONT_NEED, 434 KMEM_CBRC_DONT_KNOW 435 } kmem_cbrc_t; 436 437 /* 438 * Task queues 439 */ 440 441 #define TASKQ_NAMELEN 31 442 443 typedef uintptr_t taskqid_t; 444 typedef void (task_func_t)(void *); 445 446 typedef struct taskq_ent { 447 struct taskq_ent *tqent_next; 448 struct taskq_ent *tqent_prev; 449 task_func_t *tqent_func; 450 void *tqent_arg; 451 uintptr_t tqent_flags; 452 } taskq_ent_t; 453 454 typedef struct taskq { 455 char tq_name[TASKQ_NAMELEN + 1]; 456 kmutex_t tq_lock; 457 krwlock_t tq_threadlock; 458 kcondvar_t tq_dispatch_cv; 459 kcondvar_t tq_wait_cv; 460 kthread_t **tq_threadlist; 461 int tq_flags; 462 int tq_active; 463 int tq_nthreads; 464 int tq_nalloc; 465 int tq_minalloc; 466 int tq_maxalloc; 467 kcondvar_t tq_maxalloc_cv; 468 int tq_maxalloc_wait; 469 taskq_ent_t *tq_freelist; 470 taskq_ent_t tq_task; 471 } taskq_t; 472 473 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */ 474 475 #define TASKQ_PREPOPULATE 0x0001 476 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 477 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 478 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */ 479 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */ 480 481 #define TQ_SLEEP KM_SLEEP /* Can block for memory */ 482 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 483 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 484 #define TQ_FRONT 0x08 /* Queue in front */ 485 486 #define TASKQID_INVALID ((taskqid_t)0) 487 488 extern taskq_t *system_taskq; 489 extern taskq_t *system_delay_taskq; 490 491 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 492 #define taskq_create_proc(a, b, c, d, e, p, f) \ 493 (taskq_create(a, b, c, d, e, f)) 494 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \ 495 (taskq_create(a, b, maxclsyspri, d, e, f)) 496 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 497 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t, 498 clock_t); 499 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, 500 taskq_ent_t *); 501 extern int taskq_empty_ent(taskq_ent_t *); 502 extern void taskq_init_ent(taskq_ent_t *); 503 extern void taskq_destroy(taskq_t *); 504 extern void taskq_wait(taskq_t *); 505 extern void taskq_wait_id(taskq_t *, taskqid_t); 506 extern void taskq_wait_outstanding(taskq_t *, taskqid_t); 507 extern int taskq_member(taskq_t *, kthread_t *); 508 extern taskq_t *taskq_of_curthread(void); 509 extern int taskq_cancel_id(taskq_t *, taskqid_t); 510 extern void system_taskq_init(void); 511 extern void system_taskq_fini(void); 512 513 #define XVA_MAPSIZE 3 514 #define XVA_MAGIC 0x78766174 515 516 extern char *vn_dumpdir; 517 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */ 518 519 typedef struct xoptattr { 520 inode_timespec_t xoa_createtime; /* Create time of file */ 521 uint8_t xoa_archive; 522 uint8_t xoa_system; 523 uint8_t xoa_readonly; 524 uint8_t xoa_hidden; 525 uint8_t xoa_nounlink; 526 uint8_t xoa_immutable; 527 uint8_t xoa_appendonly; 528 uint8_t xoa_nodump; 529 uint8_t xoa_settable; 530 uint8_t xoa_opaque; 531 uint8_t xoa_av_quarantined; 532 uint8_t xoa_av_modified; 533 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ]; 534 uint8_t xoa_reparse; 535 uint8_t xoa_offline; 536 uint8_t xoa_sparse; 537 } xoptattr_t; 538 539 typedef struct vattr { 540 uint_t va_mask; /* bit-mask of attributes */ 541 u_offset_t va_size; /* file size in bytes */ 542 } vattr_t; 543 544 545 typedef struct xvattr { 546 vattr_t xva_vattr; /* Embedded vattr structure */ 547 uint32_t xva_magic; /* Magic Number */ 548 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */ 549 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */ 550 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */ 551 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */ 552 xoptattr_t xva_xoptattrs; /* Optional attributes */ 553 } xvattr_t; 554 555 typedef struct vsecattr { 556 uint_t vsa_mask; /* See below */ 557 int vsa_aclcnt; /* ACL entry count */ 558 void *vsa_aclentp; /* pointer to ACL entries */ 559 int vsa_dfaclcnt; /* default ACL entry count */ 560 void *vsa_dfaclentp; /* pointer to default ACL entries */ 561 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */ 562 } vsecattr_t; 563 564 #define AT_MODE 0x00002 565 #define AT_UID 0x00004 566 #define AT_GID 0x00008 567 #define AT_FSID 0x00010 568 #define AT_NODEID 0x00020 569 #define AT_NLINK 0x00040 570 #define AT_SIZE 0x00080 571 #define AT_ATIME 0x00100 572 #define AT_MTIME 0x00200 573 #define AT_CTIME 0x00400 574 #define AT_RDEV 0x00800 575 #define AT_BLKSIZE 0x01000 576 #define AT_NBLOCKS 0x02000 577 #define AT_SEQ 0x08000 578 #define AT_XVATTR 0x10000 579 580 #define CRCREAT 0 581 582 #define F_FREESP 11 583 #define FIGNORECASE 0x80000 /* request case-insensitive lookups */ 584 585 /* 586 * Random stuff 587 */ 588 #define ddi_get_lbolt() (gethrtime() >> 23) 589 #define ddi_get_lbolt64() (gethrtime() >> 23) 590 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 591 592 #define ddi_time_before(a, b) (a < b) 593 #define ddi_time_after(a, b) ddi_time_before(b, a) 594 #define ddi_time_before_eq(a, b) (!ddi_time_after(a, b)) 595 #define ddi_time_after_eq(a, b) ddi_time_before_eq(b, a) 596 597 #define ddi_time_before64(a, b) (a < b) 598 #define ddi_time_after64(a, b) ddi_time_before64(b, a) 599 #define ddi_time_before_eq64(a, b) (!ddi_time_after64(a, b)) 600 #define ddi_time_after_eq64(a, b) ddi_time_before_eq64(b, a) 601 602 extern void delay(clock_t ticks); 603 604 #define SEC_TO_TICK(sec) ((sec) * hz) 605 #define MSEC_TO_TICK(msec) (howmany((hrtime_t)(msec) * hz, MILLISEC)) 606 #define USEC_TO_TICK(usec) (howmany((hrtime_t)(usec) * hz, MICROSEC)) 607 #define NSEC_TO_TICK(nsec) (howmany((hrtime_t)(nsec) * hz, NANOSEC)) 608 609 #define max_ncpus 64 610 #define boot_ncpus (sysconf(_SC_NPROCESSORS_ONLN)) 611 612 /* 613 * Process priorities as defined by setpriority(2) and getpriority(2). 614 */ 615 #define minclsyspri 19 616 #define maxclsyspri -20 617 #define defclsyspri 0 618 619 #define CPU_SEQID ((uintptr_t)pthread_self() & (max_ncpus - 1)) 620 #define CPU_SEQID_UNSTABLE CPU_SEQID 621 622 #define kcred NULL 623 #define CRED() NULL 624 625 #define ptob(x) ((x) * PAGESIZE) 626 627 #define NN_DIVISOR_1000 (1U << 0) 628 #define NN_NUMBUF_SZ (6) 629 630 extern uint64_t physmem; 631 extern const char *random_path; 632 extern const char *urandom_path; 633 634 extern int highbit64(uint64_t i); 635 extern int lowbit64(uint64_t i); 636 extern int random_get_bytes(uint8_t *ptr, size_t len); 637 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 638 639 static __inline__ uint32_t 640 random_in_range(uint32_t range) 641 { 642 uint32_t r; 643 644 ASSERT(range != 0); 645 646 if (range == 1) 647 return (0); 648 649 (void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r)); 650 651 return (r % range); 652 } 653 654 extern void kernel_init(int mode); 655 extern void kernel_fini(void); 656 extern void random_init(void); 657 extern void random_fini(void); 658 659 struct spa; 660 extern void show_pool_stats(struct spa *); 661 extern int set_global_var(char const *arg); 662 663 typedef struct callb_cpr { 664 kmutex_t *cc_lockp; 665 } callb_cpr_t; 666 667 #define CALLB_CPR_INIT(cp, lockp, func, name) { \ 668 (cp)->cc_lockp = lockp; \ 669 } 670 671 #define CALLB_CPR_SAFE_BEGIN(cp) { \ 672 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 673 } 674 675 #define CALLB_CPR_SAFE_END(cp, lockp) { \ 676 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 677 } 678 679 #define CALLB_CPR_EXIT(cp) { \ 680 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 681 mutex_exit((cp)->cc_lockp); \ 682 } 683 684 #define zone_dataset_visible(x, y) (1) 685 #define INGLOBALZONE(z) (1) 686 extern uint32_t zone_get_hostid(void *zonep); 687 688 extern char *kmem_vasprintf(const char *fmt, va_list adx); 689 extern char *kmem_asprintf(const char *fmt, ...); 690 #define kmem_strfree(str) kmem_free((str), strlen(str) + 1) 691 #define kmem_strdup(s) strdup(s) 692 693 /* 694 * Hostname information 695 */ 696 extern char hw_serial[]; /* for userland-emulated hostid access */ 697 extern int ddi_strtoul(const char *str, char **nptr, int base, 698 unsigned long *result); 699 700 extern int ddi_strtoull(const char *str, char **nptr, int base, 701 u_longlong_t *result); 702 703 typedef struct utsname utsname_t; 704 extern utsname_t *utsname(void); 705 706 /* ZFS Boot Related stuff. */ 707 708 struct _buf { 709 intptr_t _fd; 710 }; 711 712 struct bootstat { 713 uint64_t st_size; 714 }; 715 716 typedef struct ace_object { 717 uid_t a_who; 718 uint32_t a_access_mask; 719 uint16_t a_flags; 720 uint16_t a_type; 721 uint8_t a_obj_type[16]; 722 uint8_t a_inherit_obj_type[16]; 723 } ace_object_t; 724 725 726 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05 727 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06 728 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07 729 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08 730 731 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr); 732 extern int zfs_secpolicy_rename_perms(const char *from, const char *to, 733 cred_t *cr); 734 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr); 735 extern int secpolicy_zfs(const cred_t *cr); 736 extern int secpolicy_zfs_proc(const cred_t *cr, proc_t *proc); 737 extern zoneid_t getzoneid(void); 738 739 /* SID stuff */ 740 typedef struct ksiddomain { 741 uint_t kd_ref; 742 uint_t kd_len; 743 char *kd_name; 744 } ksiddomain_t; 745 746 ksiddomain_t *ksid_lookupdomain(const char *); 747 void ksiddomain_rele(ksiddomain_t *); 748 749 #define DDI_SLEEP KM_SLEEP 750 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \ 751 sysevent_post_event(_c, _d, _b, "libzpool", _e, _f) 752 753 #define zfs_sleep_until(wakeup) \ 754 do { \ 755 hrtime_t delta = wakeup - gethrtime(); \ 756 struct timespec ts; \ 757 ts.tv_sec = delta / NANOSEC; \ 758 ts.tv_nsec = delta % NANOSEC; \ 759 (void) nanosleep(&ts, NULL); \ 760 } while (0) 761 762 typedef int fstrans_cookie_t; 763 764 extern fstrans_cookie_t spl_fstrans_mark(void); 765 extern void spl_fstrans_unmark(fstrans_cookie_t); 766 extern int __spl_pf_fstrans_check(void); 767 extern int kmem_cache_reap_active(void); 768 769 #define ____cacheline_aligned 770 771 /* 772 * Kernel modules 773 */ 774 #define __init 775 #define __exit 776 777 #endif /* _KERNEL || _STANDALONE */ 778 779 #ifdef __cplusplus 780 }; 781 #endif 782 783 #endif /* _SYS_ZFS_CONTEXT_H */ 784