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