Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/zfs_context.h
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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 https://opensource.org/licenses/CDDL-1.0. 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/misc.h> 54 #include <sys/taskq.h> 55 #include <sys/param.h> 56 #include <sys/disp.h> 57 #include <sys/debug.h> 58 #include <sys/random.h> 59 #include <sys/string.h> 60 #include <sys/byteorder.h> 61 #include <sys/list.h> 62 #include <sys/time.h> 63 #include <sys/zone.h> 64 #include <sys/kstat.h> 65 #include <sys/zfs_debug.h> 66 #include <sys/sysevent.h> 67 #include <sys/sysevent/eventdefs.h> 68 #include <sys/zfs_delay.h> 69 #include <sys/sunddi.h> 70 #include <sys/ctype.h> 71 #include <sys/disp.h> 72 #include <sys/trace.h> 73 #include <sys/procfs_list.h> 74 #include <sys/mod.h> 75 #include <sys/uio_impl.h> 76 #include <sys/zfs_context_os.h> 77 #else /* _KERNEL || _STANDALONE */ 78 79 #define _SYS_MUTEX_H 80 #define _SYS_RWLOCK_H 81 #define _SYS_CONDVAR_H 82 #define _SYS_VNODE_H 83 #define _SYS_VFS_H 84 #define _SYS_SUNDDI_H 85 #define _SYS_CALLB_H 86 87 #include <stdio.h> 88 #include <stdlib.h> 89 #include <stddef.h> 90 #include <stdarg.h> 91 #include <fcntl.h> 92 #include <unistd.h> 93 #include <errno.h> 94 #include <string.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 __attribute__((format(printf, 2, 3))); 156 extern void vcmn_err(int, const char *, va_list) 157 __attribute__((format(printf, 2, 0))); 158 extern void panic(const char *, ...) 159 __attribute__((format(printf, 1, 2), noreturn)); 160 extern void vpanic(const char *, va_list) 161 __attribute__((format(printf, 1, 0), noreturn)); 162 163 #define fm_panic panic 164 165 /* 166 * DTrace SDT probes have different signatures in userland than they do in 167 * the kernel. If they're being used in kernel code, re-define them out of 168 * existence for their counterparts in libzpool. 169 * 170 * Here's an example of how to use the set-error probes in userland: 171 * zfs$target:::set-error /arg0 == EBUSY/ {stack();} 172 * 173 * Here's an example of how to use DTRACE_PROBE probes in userland: 174 * If there is a probe declared as follows: 175 * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn); 176 * Then you can use it as follows: 177 * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/ 178 * {printf("%u %p\n", arg1, arg2);} 179 */ 180 181 #ifdef DTRACE_PROBE 182 #undef DTRACE_PROBE 183 #endif /* DTRACE_PROBE */ 184 #define DTRACE_PROBE(a) 185 186 #ifdef DTRACE_PROBE1 187 #undef DTRACE_PROBE1 188 #endif /* DTRACE_PROBE1 */ 189 #define DTRACE_PROBE1(a, b, c) 190 191 #ifdef DTRACE_PROBE2 192 #undef DTRACE_PROBE2 193 #endif /* DTRACE_PROBE2 */ 194 #define DTRACE_PROBE2(a, b, c, d, e) 195 196 #ifdef DTRACE_PROBE3 197 #undef DTRACE_PROBE3 198 #endif /* DTRACE_PROBE3 */ 199 #define DTRACE_PROBE3(a, b, c, d, e, f, g) 200 201 #ifdef DTRACE_PROBE4 202 #undef DTRACE_PROBE4 203 #endif /* DTRACE_PROBE4 */ 204 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) 205 206 /* 207 * Tunables. 208 */ 209 typedef struct zfs_kernel_param { 210 const char *name; /* unused stub */ 211 } zfs_kernel_param_t; 212 213 #define ZFS_MODULE_PARAM(scope_prefix, name_prefix, name, type, perm, desc) 214 #define ZFS_MODULE_PARAM_ARGS void 215 #define ZFS_MODULE_PARAM_CALL(scope_prefix, name_prefix, name, setfunc, \ 216 getfunc, perm, desc) 217 218 /* 219 * Threads. 220 */ 221 typedef pthread_t kthread_t; 222 223 #define TS_RUN 0x00000002 224 #define TS_JOINABLE 0x00000004 225 226 #define curthread ((void *)(uintptr_t)pthread_self()) 227 #define getcomm() "unknown" 228 229 #define thread_create_named(name, stk, stksize, func, arg, len, \ 230 pp, state, pri) \ 231 zk_thread_create(func, arg, stksize, state) 232 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 233 zk_thread_create(func, arg, stksize, state) 234 #define thread_exit() pthread_exit(NULL) 235 #define thread_join(t) pthread_join((pthread_t)(t), NULL) 236 237 #define newproc(f, a, cid, pri, ctp, pid) (ENOSYS) 238 239 /* in libzpool, p0 exists only to have its address taken */ 240 typedef struct proc { 241 uintptr_t this_is_never_used_dont_dereference_it; 242 } proc_t; 243 244 extern struct proc p0; 245 #define curproc (&p0) 246 247 #define PS_NONE -1 248 249 extern kthread_t *zk_thread_create(void (*func)(void *), void *arg, 250 size_t stksize, int state); 251 252 #define issig(why) (FALSE) 253 #define ISSIG(thr, why) (FALSE) 254 255 #define KPREEMPT_SYNC (-1) 256 257 #define kpreempt(x) sched_yield() 258 #define kpreempt_disable() ((void)0) 259 #define kpreempt_enable() ((void)0) 260 261 /* 262 * Mutexes 263 */ 264 typedef struct kmutex { 265 pthread_mutex_t m_lock; 266 pthread_t m_owner; 267 } kmutex_t; 268 269 #define MUTEX_DEFAULT 0 270 #define MUTEX_NOLOCKDEP MUTEX_DEFAULT 271 #define MUTEX_HELD(mp) pthread_equal((mp)->m_owner, pthread_self()) 272 #define MUTEX_NOT_HELD(mp) !MUTEX_HELD(mp) 273 274 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie); 275 extern void mutex_destroy(kmutex_t *mp); 276 extern void mutex_enter(kmutex_t *mp); 277 extern void mutex_exit(kmutex_t *mp); 278 extern int mutex_tryenter(kmutex_t *mp); 279 280 #define NESTED_SINGLE 1 281 #define mutex_enter_nested(mp, class) mutex_enter(mp) 282 /* 283 * RW locks 284 */ 285 typedef struct krwlock { 286 pthread_rwlock_t rw_lock; 287 pthread_t rw_owner; 288 uint_t rw_readers; 289 } krwlock_t; 290 291 typedef int krw_t; 292 293 #define RW_READER 0 294 #define RW_WRITER 1 295 #define RW_DEFAULT RW_READER 296 #define RW_NOLOCKDEP RW_READER 297 298 #define RW_READ_HELD(rw) ((rw)->rw_readers > 0) 299 #define RW_WRITE_HELD(rw) pthread_equal((rw)->rw_owner, pthread_self()) 300 #define RW_LOCK_HELD(rw) (RW_READ_HELD(rw) || RW_WRITE_HELD(rw)) 301 302 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 303 extern void rw_destroy(krwlock_t *rwlp); 304 extern void rw_enter(krwlock_t *rwlp, krw_t rw); 305 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 306 extern int rw_tryupgrade(krwlock_t *rwlp); 307 extern void rw_exit(krwlock_t *rwlp); 308 #define rw_downgrade(rwlp) do { } while (0) 309 310 /* 311 * Credentials 312 */ 313 extern uid_t crgetuid(cred_t *cr); 314 extern uid_t crgetruid(cred_t *cr); 315 extern gid_t crgetgid(cred_t *cr); 316 extern int crgetngroups(cred_t *cr); 317 extern gid_t *crgetgroups(cred_t *cr); 318 319 /* 320 * Condition variables 321 */ 322 typedef pthread_cond_t kcondvar_t; 323 324 #define CV_DEFAULT 0 325 #define CALLOUT_FLAG_ABSOLUTE 0x2 326 327 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 328 extern void cv_destroy(kcondvar_t *cv); 329 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 330 extern int cv_wait_sig(kcondvar_t *cv, kmutex_t *mp); 331 extern int cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 332 extern int cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim, 333 hrtime_t res, int flag); 334 extern void cv_signal(kcondvar_t *cv); 335 extern void cv_broadcast(kcondvar_t *cv); 336 337 #define cv_timedwait_io(cv, mp, at) cv_timedwait(cv, mp, at) 338 #define cv_timedwait_idle(cv, mp, at) cv_timedwait(cv, mp, at) 339 #define cv_timedwait_sig(cv, mp, at) cv_timedwait(cv, mp, at) 340 #define cv_wait_io(cv, mp) cv_wait(cv, mp) 341 #define cv_wait_idle(cv, mp) cv_wait(cv, mp) 342 #define cv_wait_io_sig(cv, mp) cv_wait_sig(cv, mp) 343 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \ 344 cv_timedwait_hires(cv, mp, t, r, f) 345 #define cv_timedwait_idle_hires(cv, mp, t, r, f) \ 346 cv_timedwait_hires(cv, mp, t, r, f) 347 348 /* 349 * Thread-specific data 350 */ 351 #define tsd_get(k) pthread_getspecific(k) 352 #define tsd_set(k, v) pthread_setspecific(k, v) 353 #define tsd_create(kp, d) pthread_key_create((pthread_key_t *)kp, d) 354 #define tsd_destroy(kp) /* nothing */ 355 #ifdef __FreeBSD__ 356 typedef off_t loff_t; 357 #endif 358 359 /* 360 * kstat creation, installation and deletion 361 */ 362 extern kstat_t *kstat_create(const char *, int, 363 const char *, const char *, uchar_t, ulong_t, uchar_t); 364 extern void kstat_install(kstat_t *); 365 extern void kstat_delete(kstat_t *); 366 extern void kstat_set_raw_ops(kstat_t *ksp, 367 int (*headers)(char *buf, size_t size), 368 int (*data)(char *buf, size_t size, void *data), 369 void *(*addr)(kstat_t *ksp, loff_t index)); 370 371 /* 372 * procfs list manipulation 373 */ 374 375 typedef struct procfs_list { 376 void *pl_private; 377 kmutex_t pl_lock; 378 list_t pl_list; 379 uint64_t pl_next_id; 380 size_t pl_node_offset; 381 } procfs_list_t; 382 383 #ifndef __cplusplus 384 struct seq_file { }; 385 void seq_printf(struct seq_file *m, const char *fmt, ...); 386 387 typedef struct procfs_list_node { 388 list_node_t pln_link; 389 uint64_t pln_id; 390 } procfs_list_node_t; 391 392 void procfs_list_install(const char *module, 393 const char *submodule, 394 const char *name, 395 mode_t mode, 396 procfs_list_t *procfs_list, 397 int (*show)(struct seq_file *f, void *p), 398 int (*show_header)(struct seq_file *f), 399 int (*clear)(procfs_list_t *procfs_list), 400 size_t procfs_list_node_off); 401 void procfs_list_uninstall(procfs_list_t *procfs_list); 402 void procfs_list_destroy(procfs_list_t *procfs_list); 403 void procfs_list_add(procfs_list_t *procfs_list, void *p); 404 #endif 405 406 /* 407 * Kernel memory 408 */ 409 #define KM_SLEEP UMEM_NOFAIL 410 #define KM_PUSHPAGE KM_SLEEP 411 #define KM_NOSLEEP UMEM_DEFAULT 412 #define KM_NORMALPRI 0 /* not needed with UMEM_DEFAULT */ 413 #define KMC_NODEBUG UMC_NODEBUG 414 #define KMC_KVMEM 0x0 415 #define kmem_alloc(_s, _f) umem_alloc(_s, _f) 416 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 417 #define kmem_free(_b, _s) umem_free(_b, _s) 418 #define vmem_alloc(_s, _f) kmem_alloc(_s, _f) 419 #define vmem_zalloc(_s, _f) kmem_zalloc(_s, _f) 420 #define vmem_free(_b, _s) kmem_free(_b, _s) 421 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 422 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 423 #define kmem_cache_destroy(_c) umem_cache_destroy(_c) 424 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 425 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 426 #define kmem_debugging() 0 427 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c); 428 #define kmem_cache_set_move(_c, _cb) /* nothing */ 429 #define POINTER_INVALIDATE(_pp) /* nothing */ 430 #define POINTER_IS_VALID(_p) 0 431 432 typedef umem_cache_t kmem_cache_t; 433 434 typedef enum kmem_cbrc { 435 KMEM_CBRC_YES, 436 KMEM_CBRC_NO, 437 KMEM_CBRC_LATER, 438 KMEM_CBRC_DONT_NEED, 439 KMEM_CBRC_DONT_KNOW 440 } kmem_cbrc_t; 441 442 /* 443 * Task queues 444 */ 445 446 #define TASKQ_NAMELEN 31 447 448 typedef uintptr_t taskqid_t; 449 typedef void (task_func_t)(void *); 450 451 typedef struct taskq_ent { 452 struct taskq_ent *tqent_next; 453 struct taskq_ent *tqent_prev; 454 task_func_t *tqent_func; 455 void *tqent_arg; 456 uintptr_t tqent_flags; 457 } taskq_ent_t; 458 459 typedef struct taskq { 460 char tq_name[TASKQ_NAMELEN + 1]; 461 kmutex_t tq_lock; 462 krwlock_t tq_threadlock; 463 kcondvar_t tq_dispatch_cv; 464 kcondvar_t tq_wait_cv; 465 kthread_t **tq_threadlist; 466 int tq_flags; 467 int tq_active; 468 int tq_nthreads; 469 int tq_nalloc; 470 int tq_minalloc; 471 int tq_maxalloc; 472 kcondvar_t tq_maxalloc_cv; 473 int tq_maxalloc_wait; 474 taskq_ent_t *tq_freelist; 475 taskq_ent_t tq_task; 476 } taskq_t; 477 478 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */ 479 480 #define TASKQ_PREPOPULATE 0x0001 481 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 482 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 483 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */ 484 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */ 485 486 #define TQ_SLEEP KM_SLEEP /* Can block for memory */ 487 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 488 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 489 #define TQ_FRONT 0x08 /* Queue in front */ 490 491 #define TASKQID_INVALID ((taskqid_t)0) 492 493 extern taskq_t *system_taskq; 494 extern taskq_t *system_delay_taskq; 495 496 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 497 #define taskq_create_proc(a, b, c, d, e, p, f) \ 498 (taskq_create(a, b, c, d, e, f)) 499 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \ 500 ((void) sizeof (dc), taskq_create(a, b, maxclsyspri, d, e, f)) 501 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 502 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t, 503 clock_t); 504 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, 505 taskq_ent_t *); 506 extern int taskq_empty_ent(taskq_ent_t *); 507 extern void taskq_init_ent(taskq_ent_t *); 508 extern void taskq_destroy(taskq_t *); 509 extern void taskq_wait(taskq_t *); 510 extern void taskq_wait_id(taskq_t *, taskqid_t); 511 extern void taskq_wait_outstanding(taskq_t *, taskqid_t); 512 extern int taskq_member(taskq_t *, kthread_t *); 513 extern taskq_t *taskq_of_curthread(void); 514 extern int taskq_cancel_id(taskq_t *, taskqid_t); 515 extern void system_taskq_init(void); 516 extern void system_taskq_fini(void); 517 518 #define XVA_MAPSIZE 3 519 #define XVA_MAGIC 0x78766174 520 521 extern char *vn_dumpdir; 522 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */ 523 524 typedef struct xoptattr { 525 inode_timespec_t xoa_createtime; /* Create time of file */ 526 uint8_t xoa_archive; 527 uint8_t xoa_system; 528 uint8_t xoa_readonly; 529 uint8_t xoa_hidden; 530 uint8_t xoa_nounlink; 531 uint8_t xoa_immutable; 532 uint8_t xoa_appendonly; 533 uint8_t xoa_nodump; 534 uint8_t xoa_settable; 535 uint8_t xoa_opaque; 536 uint8_t xoa_av_quarantined; 537 uint8_t xoa_av_modified; 538 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ]; 539 uint8_t xoa_reparse; 540 uint8_t xoa_offline; 541 uint8_t xoa_sparse; 542 } xoptattr_t; 543 544 typedef struct vattr { 545 uint_t va_mask; /* bit-mask of attributes */ 546 u_offset_t va_size; /* file size in bytes */ 547 } vattr_t; 548 549 550 typedef struct xvattr { 551 vattr_t xva_vattr; /* Embedded vattr structure */ 552 uint32_t xva_magic; /* Magic Number */ 553 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */ 554 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */ 555 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */ 556 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */ 557 xoptattr_t xva_xoptattrs; /* Optional attributes */ 558 } xvattr_t; 559 560 typedef struct vsecattr { 561 uint_t vsa_mask; /* See below */ 562 int vsa_aclcnt; /* ACL entry count */ 563 void *vsa_aclentp; /* pointer to ACL entries */ 564 int vsa_dfaclcnt; /* default ACL entry count */ 565 void *vsa_dfaclentp; /* pointer to default ACL entries */ 566 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */ 567 } vsecattr_t; 568 569 #define AT_MODE 0x00002 570 #define AT_UID 0x00004 571 #define AT_GID 0x00008 572 #define AT_FSID 0x00010 573 #define AT_NODEID 0x00020 574 #define AT_NLINK 0x00040 575 #define AT_SIZE 0x00080 576 #define AT_ATIME 0x00100 577 #define AT_MTIME 0x00200 578 #define AT_CTIME 0x00400 579 #define AT_RDEV 0x00800 580 #define AT_BLKSIZE 0x01000 581 #define AT_NBLOCKS 0x02000 582 #define AT_SEQ 0x08000 583 #define AT_XVATTR 0x10000 584 585 #define CRCREAT 0 586 587 #define F_FREESP 11 588 #define FIGNORECASE 0x80000 /* request case-insensitive lookups */ 589 590 /* 591 * Random stuff 592 */ 593 #define ddi_get_lbolt() (gethrtime() >> 23) 594 #define ddi_get_lbolt64() (gethrtime() >> 23) 595 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 596 597 #define ddi_time_before(a, b) (a < b) 598 #define ddi_time_after(a, b) ddi_time_before(b, a) 599 #define ddi_time_before_eq(a, b) (!ddi_time_after(a, b)) 600 #define ddi_time_after_eq(a, b) ddi_time_before_eq(b, a) 601 602 #define ddi_time_before64(a, b) (a < b) 603 #define ddi_time_after64(a, b) ddi_time_before64(b, a) 604 #define ddi_time_before_eq64(a, b) (!ddi_time_after64(a, b)) 605 #define ddi_time_after_eq64(a, b) ddi_time_before_eq64(b, a) 606 607 extern void delay(clock_t ticks); 608 609 #define SEC_TO_TICK(sec) ((sec) * hz) 610 #define MSEC_TO_TICK(msec) (howmany((hrtime_t)(msec) * hz, MILLISEC)) 611 #define USEC_TO_TICK(usec) (howmany((hrtime_t)(usec) * hz, MICROSEC)) 612 #define NSEC_TO_TICK(nsec) (howmany((hrtime_t)(nsec) * hz, NANOSEC)) 613 614 #define max_ncpus 64 615 #define boot_ncpus (sysconf(_SC_NPROCESSORS_ONLN)) 616 617 /* 618 * Process priorities as defined by setpriority(2) and getpriority(2). 619 */ 620 #define minclsyspri 19 621 #define maxclsyspri -20 622 #define defclsyspri 0 623 624 #define CPU_SEQID ((uintptr_t)pthread_self() & (max_ncpus - 1)) 625 #define CPU_SEQID_UNSTABLE CPU_SEQID 626 627 #define kcred NULL 628 #define CRED() NULL 629 630 #define ptob(x) ((x) * PAGESIZE) 631 632 #define NN_DIVISOR_1000 (1U << 0) 633 #define NN_NUMBUF_SZ (6) 634 635 extern uint64_t physmem; 636 extern const char *random_path; 637 extern const char *urandom_path; 638 639 extern int highbit64(uint64_t i); 640 extern int lowbit64(uint64_t i); 641 extern int random_get_bytes(uint8_t *ptr, size_t len); 642 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 643 644 static __inline__ uint32_t 645 random_in_range(uint32_t range) 646 { 647 uint32_t r; 648 649 ASSERT(range != 0); 650 651 if (range == 1) 652 return (0); 653 654 (void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r)); 655 656 return (r % range); 657 } 658 659 extern void kernel_init(int mode); 660 extern void kernel_fini(void); 661 extern void random_init(void); 662 extern void random_fini(void); 663 664 struct spa; 665 extern void show_pool_stats(struct spa *); 666 extern int set_global_var(char const *arg); 667 668 typedef struct callb_cpr { 669 kmutex_t *cc_lockp; 670 } callb_cpr_t; 671 672 #define CALLB_CPR_INIT(cp, lockp, func, name) { \ 673 (cp)->cc_lockp = lockp; \ 674 } 675 676 #define CALLB_CPR_SAFE_BEGIN(cp) { \ 677 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 678 } 679 680 #define CALLB_CPR_SAFE_END(cp, lockp) { \ 681 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 682 } 683 684 #define CALLB_CPR_EXIT(cp) { \ 685 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 686 mutex_exit((cp)->cc_lockp); \ 687 } 688 689 #define zone_dataset_visible(x, y) (1) 690 #define INGLOBALZONE(z) (1) 691 extern uint32_t zone_get_hostid(void *zonep); 692 693 extern char *kmem_vasprintf(const char *fmt, va_list adx); 694 extern char *kmem_asprintf(const char *fmt, ...); 695 #define kmem_strfree(str) kmem_free((str), strlen(str) + 1) 696 #define kmem_strdup(s) strdup(s) 697 698 #ifndef __cplusplus 699 extern int kmem_scnprintf(char *restrict str, size_t size, 700 const char *restrict fmt, ...); 701 #endif 702 703 /* 704 * Hostname information 705 */ 706 extern int ddi_strtoull(const char *str, char **nptr, int base, 707 u_longlong_t *result); 708 709 typedef struct utsname utsname_t; 710 extern utsname_t *utsname(void); 711 712 /* ZFS Boot Related stuff. */ 713 714 struct _buf { 715 intptr_t _fd; 716 }; 717 718 struct bootstat { 719 uint64_t st_size; 720 }; 721 722 typedef struct ace_object { 723 uid_t a_who; 724 uint32_t a_access_mask; 725 uint16_t a_flags; 726 uint16_t a_type; 727 uint8_t a_obj_type[16]; 728 uint8_t a_inherit_obj_type[16]; 729 } ace_object_t; 730 731 732 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05 733 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06 734 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07 735 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08 736 737 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr); 738 extern int zfs_secpolicy_rename_perms(const char *from, const char *to, 739 cred_t *cr); 740 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr); 741 extern int secpolicy_zfs(const cred_t *cr); 742 extern int secpolicy_zfs_proc(const cred_t *cr, proc_t *proc); 743 extern zoneid_t getzoneid(void); 744 745 /* SID stuff */ 746 typedef struct ksiddomain { 747 uint_t kd_ref; 748 uint_t kd_len; 749 char *kd_name; 750 } ksiddomain_t; 751 752 ksiddomain_t *ksid_lookupdomain(const char *); 753 void ksiddomain_rele(ksiddomain_t *); 754 755 #define DDI_SLEEP KM_SLEEP 756 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \ 757 sysevent_post_event(_c, _d, _b, "libzpool", _e, _f) 758 759 #define zfs_sleep_until(wakeup) \ 760 do { \ 761 hrtime_t delta = wakeup - gethrtime(); \ 762 struct timespec ts; \ 763 ts.tv_sec = delta / NANOSEC; \ 764 ts.tv_nsec = delta % NANOSEC; \ 765 (void) nanosleep(&ts, NULL); \ 766 } while (0) 767 768 typedef int fstrans_cookie_t; 769 770 extern fstrans_cookie_t spl_fstrans_mark(void); 771 extern void spl_fstrans_unmark(fstrans_cookie_t); 772 extern int __spl_pf_fstrans_check(void); 773 extern int kmem_cache_reap_active(void); 774 775 776 /* 777 * Kernel modules 778 */ 779 #define __init 780 #define __exit 781 782 #endif /* _KERNEL || _STANDALONE */ 783 784 #ifdef __cplusplus 785 }; 786 #endif 787 788 #endif /* _SYS_ZFS_CONTEXT_H */
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