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