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/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 <strings.h> 96 #include <pthread.h> 97 #include <setjmp.h> 98 #include <assert.h> 99 #include <umem.h> 100 #include <limits.h> 101 #include <atomic.h> 102 #include <dirent.h> 103 #include <time.h> 104 #include <ctype.h> 105 #include <signal.h> 106 #include <sys/mman.h> 107 #include <sys/note.h> 108 #include <sys/types.h> 109 #include <sys/cred.h> 110 #include <sys/sysmacros.h> 111 #include <sys/resource.h> 112 #include <sys/byteorder.h> 113 #include <sys/list.h> 114 #include <sys/mod.h> 115 #include <sys/uio.h> 116 #include <sys/zfs_debug.h> 117 #include <sys/kstat.h> 118 #include <sys/u8_textprep.h> 119 #include <sys/sysevent.h> 120 #include <sys/sysevent/eventdefs.h> 121 #include <sys/sunddi.h> 122 #include <sys/debug.h> 123 #include <sys/utsname.h> 124 #include <sys/trace_zfs.h> 125 126 #include <sys/zfs_context_os.h> 127 128 /* 129 * Stack 130 */ 131 132 #define noinline __attribute__((noinline)) 133 #define likely(x) __builtin_expect((x), 1) 134 #define unlikely(x) __builtin_expect((x), 0) 135 136 /* 137 * Debugging 138 */ 139 140 /* 141 * Note that we are not using the debugging levels. 142 */ 143 144 #define CE_CONT 0 /* continuation */ 145 #define CE_NOTE 1 /* notice */ 146 #define CE_WARN 2 /* warning */ 147 #define CE_PANIC 3 /* panic */ 148 #define CE_IGNORE 4 /* print nothing */ 149 150 /* 151 * ZFS debugging 152 */ 153 154 extern void dprintf_setup(int *argc, char **argv); 155 156 extern void cmn_err(int, const char *, ...); 157 extern void vcmn_err(int, const char *, va_list); 158 extern void panic(const char *, ...) __NORETURN; 159 extern void vpanic(const char *, va_list) __NORETURN; 160 161 #define fm_panic panic 162 163 extern int aok; 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 kpreempt(x) yield() 228 #define getcomm() "unknown" 229 230 #define thread_create_named(name, stk, stksize, func, arg, len, \ 231 pp, state, pri) \ 232 zk_thread_create(func, arg, stksize, state) 233 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 234 zk_thread_create(func, arg, stksize, state) 235 #define thread_exit() pthread_exit(NULL) 236 #define thread_join(t) pthread_join((pthread_t)(t), NULL) 237 238 #define newproc(f, a, cid, pri, ctp, pid) (ENOSYS) 239 240 /* in libzpool, p0 exists only to have its address taken */ 241 typedef struct proc { 242 uintptr_t this_is_never_used_dont_dereference_it; 243 } proc_t; 244 245 extern struct proc p0; 246 #define curproc (&p0) 247 248 #define PS_NONE -1 249 250 extern kthread_t *zk_thread_create(void (*func)(void *), void *arg, 251 size_t stksize, int state); 252 253 #define issig(why) (FALSE) 254 #define ISSIG(thr, why) (FALSE) 255 256 #define kpreempt_disable() ((void)0) 257 #define kpreempt_enable() ((void)0) 258 #define cond_resched() sched_yield() 259 260 /* 261 * Mutexes 262 */ 263 typedef struct kmutex { 264 pthread_mutex_t m_lock; 265 pthread_t m_owner; 266 } kmutex_t; 267 268 #define MUTEX_DEFAULT 0 269 #define MUTEX_NOLOCKDEP MUTEX_DEFAULT 270 #define MUTEX_HELD(mp) pthread_equal((mp)->m_owner, pthread_self()) 271 #define MUTEX_NOT_HELD(mp) !MUTEX_HELD(mp) 272 273 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie); 274 extern void mutex_destroy(kmutex_t *mp); 275 extern void mutex_enter(kmutex_t *mp); 276 extern void mutex_exit(kmutex_t *mp); 277 extern int mutex_tryenter(kmutex_t *mp); 278 279 #define NESTED_SINGLE 1 280 #define mutex_enter_nested(mp, class) mutex_enter(mp) 281 /* 282 * RW locks 283 */ 284 typedef struct krwlock { 285 pthread_rwlock_t rw_lock; 286 pthread_t rw_owner; 287 uint_t rw_readers; 288 } krwlock_t; 289 290 typedef int krw_t; 291 292 #define RW_READER 0 293 #define RW_WRITER 1 294 #define RW_DEFAULT RW_READER 295 #define RW_NOLOCKDEP RW_READER 296 297 #define RW_READ_HELD(rw) ((rw)->rw_readers > 0) 298 #define RW_WRITE_HELD(rw) pthread_equal((rw)->rw_owner, pthread_self()) 299 #define RW_LOCK_HELD(rw) (RW_READ_HELD(rw) || RW_WRITE_HELD(rw)) 300 301 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 302 extern void rw_destroy(krwlock_t *rwlp); 303 extern void rw_enter(krwlock_t *rwlp, krw_t rw); 304 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 305 extern int rw_tryupgrade(krwlock_t *rwlp); 306 extern void rw_exit(krwlock_t *rwlp); 307 #define rw_downgrade(rwlp) do { } while (0) 308 309 /* 310 * Credentials 311 */ 312 extern uid_t crgetuid(cred_t *cr); 313 extern uid_t crgetruid(cred_t *cr); 314 extern gid_t crgetgid(cred_t *cr); 315 extern int crgetngroups(cred_t *cr); 316 extern gid_t *crgetgroups(cred_t *cr); 317 318 /* 319 * Condition variables 320 */ 321 typedef pthread_cond_t kcondvar_t; 322 323 #define CV_DEFAULT 0 324 #define CALLOUT_FLAG_ABSOLUTE 0x2 325 326 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 327 extern void cv_destroy(kcondvar_t *cv); 328 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 329 extern int cv_wait_sig(kcondvar_t *cv, kmutex_t *mp); 330 extern int cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 331 extern int cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim, 332 hrtime_t res, int flag); 333 extern void cv_signal(kcondvar_t *cv); 334 extern void cv_broadcast(kcondvar_t *cv); 335 336 #define cv_timedwait_io(cv, mp, at) cv_timedwait(cv, mp, at) 337 #define cv_timedwait_idle(cv, mp, at) cv_timedwait(cv, mp, at) 338 #define cv_timedwait_sig(cv, mp, at) cv_timedwait(cv, mp, at) 339 #define cv_wait_io(cv, mp) cv_wait(cv, mp) 340 #define cv_wait_idle(cv, mp) cv_wait(cv, mp) 341 #define cv_wait_io_sig(cv, mp) cv_wait_sig(cv, mp) 342 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \ 343 cv_timedwait_hires(cv, mp, t, r, f) 344 #define cv_timedwait_idle_hires(cv, mp, t, r, f) \ 345 cv_timedwait_hires(cv, mp, t, r, f) 346 347 /* 348 * Thread-specific data 349 */ 350 #define tsd_get(k) pthread_getspecific(k) 351 #define tsd_set(k, v) pthread_setspecific(k, v) 352 #define tsd_create(kp, d) pthread_key_create((pthread_key_t *)kp, d) 353 #define tsd_destroy(kp) /* nothing */ 354 #ifdef __FreeBSD__ 355 typedef off_t loff_t; 356 #endif 357 358 /* 359 * kstat creation, installation and deletion 360 */ 361 extern kstat_t *kstat_create(const char *, int, 362 const char *, const char *, uchar_t, ulong_t, uchar_t); 363 extern void kstat_install(kstat_t *); 364 extern void kstat_delete(kstat_t *); 365 extern void kstat_set_raw_ops(kstat_t *ksp, 366 int (*headers)(char *buf, size_t size), 367 int (*data)(char *buf, size_t size, void *data), 368 void *(*addr)(kstat_t *ksp, loff_t index)); 369 370 /* 371 * procfs list manipulation 372 */ 373 374 typedef struct procfs_list { 375 void *pl_private; 376 kmutex_t pl_lock; 377 list_t pl_list; 378 uint64_t pl_next_id; 379 size_t pl_node_offset; 380 } procfs_list_t; 381 382 #ifndef __cplusplus 383 struct seq_file { }; 384 void seq_printf(struct seq_file *m, const char *fmt, ...); 385 386 typedef struct procfs_list_node { 387 list_node_t pln_link; 388 uint64_t pln_id; 389 } procfs_list_node_t; 390 391 void procfs_list_install(const char *module, 392 const char *submodule, 393 const char *name, 394 mode_t mode, 395 procfs_list_t *procfs_list, 396 int (*show)(struct seq_file *f, void *p), 397 int (*show_header)(struct seq_file *f), 398 int (*clear)(procfs_list_t *procfs_list), 399 size_t procfs_list_node_off); 400 void procfs_list_uninstall(procfs_list_t *procfs_list); 401 void procfs_list_destroy(procfs_list_t *procfs_list); 402 void procfs_list_add(procfs_list_t *procfs_list, void *p); 403 #endif 404 405 /* 406 * Kernel memory 407 */ 408 #define KM_SLEEP UMEM_NOFAIL 409 #define KM_PUSHPAGE KM_SLEEP 410 #define KM_NOSLEEP UMEM_DEFAULT 411 #define KM_NORMALPRI 0 /* not needed with UMEM_DEFAULT */ 412 #define KMC_NODEBUG UMC_NODEBUG 413 #define KMC_KVMEM 0x0 414 #define kmem_alloc(_s, _f) umem_alloc(_s, _f) 415 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 416 #define kmem_free(_b, _s) umem_free(_b, _s) 417 #define vmem_alloc(_s, _f) kmem_alloc(_s, _f) 418 #define vmem_zalloc(_s, _f) kmem_zalloc(_s, _f) 419 #define vmem_free(_b, _s) kmem_free(_b, _s) 420 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 421 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 422 #define kmem_cache_destroy(_c) umem_cache_destroy(_c) 423 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 424 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 425 #define kmem_debugging() 0 426 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c); 427 #define kmem_cache_set_move(_c, _cb) /* nothing */ 428 #define POINTER_INVALIDATE(_pp) /* nothing */ 429 #define POINTER_IS_VALID(_p) 0 430 431 typedef umem_cache_t kmem_cache_t; 432 433 typedef enum kmem_cbrc { 434 KMEM_CBRC_YES, 435 KMEM_CBRC_NO, 436 KMEM_CBRC_LATER, 437 KMEM_CBRC_DONT_NEED, 438 KMEM_CBRC_DONT_KNOW 439 } kmem_cbrc_t; 440 441 /* 442 * Task queues 443 */ 444 445 #define TASKQ_NAMELEN 31 446 447 typedef uintptr_t taskqid_t; 448 typedef void (task_func_t)(void *); 449 450 typedef struct taskq_ent { 451 struct taskq_ent *tqent_next; 452 struct taskq_ent *tqent_prev; 453 task_func_t *tqent_func; 454 void *tqent_arg; 455 uintptr_t tqent_flags; 456 } taskq_ent_t; 457 458 typedef struct taskq { 459 char tq_name[TASKQ_NAMELEN + 1]; 460 kmutex_t tq_lock; 461 krwlock_t tq_threadlock; 462 kcondvar_t tq_dispatch_cv; 463 kcondvar_t tq_wait_cv; 464 kthread_t **tq_threadlist; 465 int tq_flags; 466 int tq_active; 467 int tq_nthreads; 468 int tq_nalloc; 469 int tq_minalloc; 470 int tq_maxalloc; 471 kcondvar_t tq_maxalloc_cv; 472 int tq_maxalloc_wait; 473 taskq_ent_t *tq_freelist; 474 taskq_ent_t tq_task; 475 } taskq_t; 476 477 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */ 478 479 #define TASKQ_PREPOPULATE 0x0001 480 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 481 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 482 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */ 483 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */ 484 485 #define TQ_SLEEP KM_SLEEP /* Can block for memory */ 486 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 487 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 488 #define TQ_FRONT 0x08 /* Queue in front */ 489 490 #define TASKQID_INVALID ((taskqid_t)0) 491 492 extern taskq_t *system_taskq; 493 extern taskq_t *system_delay_taskq; 494 495 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 496 #define taskq_create_proc(a, b, c, d, e, p, f) \ 497 (taskq_create(a, b, c, d, e, f)) 498 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \ 499 (taskq_create(a, b, maxclsyspri, d, e, f)) 500 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 501 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t, 502 clock_t); 503 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, 504 taskq_ent_t *); 505 extern int taskq_empty_ent(taskq_ent_t *); 506 extern void taskq_init_ent(taskq_ent_t *); 507 extern void taskq_destroy(taskq_t *); 508 extern void taskq_wait(taskq_t *); 509 extern void taskq_wait_id(taskq_t *, taskqid_t); 510 extern void taskq_wait_outstanding(taskq_t *, taskqid_t); 511 extern int taskq_member(taskq_t *, kthread_t *); 512 extern taskq_t *taskq_of_curthread(void); 513 extern int taskq_cancel_id(taskq_t *, taskqid_t); 514 extern void system_taskq_init(void); 515 extern void system_taskq_fini(void); 516 517 #define XVA_MAPSIZE 3 518 #define XVA_MAGIC 0x78766174 519 520 extern char *vn_dumpdir; 521 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */ 522 523 typedef struct xoptattr { 524 inode_timespec_t xoa_createtime; /* Create time of file */ 525 uint8_t xoa_archive; 526 uint8_t xoa_system; 527 uint8_t xoa_readonly; 528 uint8_t xoa_hidden; 529 uint8_t xoa_nounlink; 530 uint8_t xoa_immutable; 531 uint8_t xoa_appendonly; 532 uint8_t xoa_nodump; 533 uint8_t xoa_settable; 534 uint8_t xoa_opaque; 535 uint8_t xoa_av_quarantined; 536 uint8_t xoa_av_modified; 537 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ]; 538 uint8_t xoa_reparse; 539 uint8_t xoa_offline; 540 uint8_t xoa_sparse; 541 } xoptattr_t; 542 543 typedef struct vattr { 544 uint_t va_mask; /* bit-mask of attributes */ 545 u_offset_t va_size; /* file size in bytes */ 546 } vattr_t; 547 548 549 typedef struct xvattr { 550 vattr_t xva_vattr; /* Embedded vattr structure */ 551 uint32_t xva_magic; /* Magic Number */ 552 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */ 553 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */ 554 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */ 555 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */ 556 xoptattr_t xva_xoptattrs; /* Optional attributes */ 557 } xvattr_t; 558 559 typedef struct vsecattr { 560 uint_t vsa_mask; /* See below */ 561 int vsa_aclcnt; /* ACL entry count */ 562 void *vsa_aclentp; /* pointer to ACL entries */ 563 int vsa_dfaclcnt; /* default ACL entry count */ 564 void *vsa_dfaclentp; /* pointer to default ACL entries */ 565 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */ 566 } vsecattr_t; 567 568 #define AT_MODE 0x00002 569 #define AT_UID 0x00004 570 #define AT_GID 0x00008 571 #define AT_FSID 0x00010 572 #define AT_NODEID 0x00020 573 #define AT_NLINK 0x00040 574 #define AT_SIZE 0x00080 575 #define AT_ATIME 0x00100 576 #define AT_MTIME 0x00200 577 #define AT_CTIME 0x00400 578 #define AT_RDEV 0x00800 579 #define AT_BLKSIZE 0x01000 580 #define AT_NBLOCKS 0x02000 581 #define AT_SEQ 0x08000 582 #define AT_XVATTR 0x10000 583 584 #define CRCREAT 0 585 586 #define F_FREESP 11 587 #define FIGNORECASE 0x80000 /* request case-insensitive lookups */ 588 589 /* 590 * Random stuff 591 */ 592 #define ddi_get_lbolt() (gethrtime() >> 23) 593 #define ddi_get_lbolt64() (gethrtime() >> 23) 594 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 595 596 #define ddi_time_before(a, b) (a < b) 597 #define ddi_time_after(a, b) ddi_time_before(b, a) 598 #define ddi_time_before_eq(a, b) (!ddi_time_after(a, b)) 599 #define ddi_time_after_eq(a, b) ddi_time_before_eq(b, a) 600 601 #define ddi_time_before64(a, b) (a < b) 602 #define ddi_time_after64(a, b) ddi_time_before64(b, a) 603 #define ddi_time_before_eq64(a, b) (!ddi_time_after64(a, b)) 604 #define ddi_time_after_eq64(a, b) ddi_time_before_eq64(b, a) 605 606 extern void delay(clock_t ticks); 607 608 #define SEC_TO_TICK(sec) ((sec) * hz) 609 #define MSEC_TO_TICK(msec) (howmany((hrtime_t)(msec) * hz, MILLISEC)) 610 #define USEC_TO_TICK(usec) (howmany((hrtime_t)(usec) * hz, MICROSEC)) 611 #define NSEC_TO_TICK(nsec) (howmany((hrtime_t)(nsec) * hz, NANOSEC)) 612 613 #define max_ncpus 64 614 #define boot_ncpus (sysconf(_SC_NPROCESSORS_ONLN)) 615 616 /* 617 * Process priorities as defined by setpriority(2) and getpriority(2). 618 */ 619 #define minclsyspri 19 620 #define maxclsyspri -20 621 #define defclsyspri 0 622 623 #define CPU_SEQID ((uintptr_t)pthread_self() & (max_ncpus - 1)) 624 #define CPU_SEQID_UNSTABLE CPU_SEQID 625 626 #define kcred NULL 627 #define CRED() NULL 628 629 #define ptob(x) ((x) * PAGESIZE) 630 631 #define NN_DIVISOR_1000 (1U << 0) 632 #define NN_NUMBUF_SZ (6) 633 634 extern uint64_t physmem; 635 extern const char *random_path; 636 extern const char *urandom_path; 637 638 extern int highbit64(uint64_t i); 639 extern int lowbit64(uint64_t i); 640 extern int random_get_bytes(uint8_t *ptr, size_t len); 641 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 642 643 static __inline__ uint32_t 644 random_in_range(uint32_t range) 645 { 646 uint32_t r; 647 648 ASSERT(range != 0); 649 650 if (range == 1) 651 return (0); 652 653 (void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r)); 654 655 return (r % range); 656 } 657 658 extern void kernel_init(int mode); 659 extern void kernel_fini(void); 660 extern void random_init(void); 661 extern void random_fini(void); 662 663 struct spa; 664 extern void show_pool_stats(struct spa *); 665 extern int set_global_var(char const *arg); 666 667 typedef struct callb_cpr { 668 kmutex_t *cc_lockp; 669 } callb_cpr_t; 670 671 #define CALLB_CPR_INIT(cp, lockp, func, name) { \ 672 (cp)->cc_lockp = lockp; \ 673 } 674 675 #define CALLB_CPR_SAFE_BEGIN(cp) { \ 676 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 677 } 678 679 #define CALLB_CPR_SAFE_END(cp, lockp) { \ 680 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 681 } 682 683 #define CALLB_CPR_EXIT(cp) { \ 684 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 685 mutex_exit((cp)->cc_lockp); \ 686 } 687 688 #define zone_dataset_visible(x, y) (1) 689 #define INGLOBALZONE(z) (1) 690 extern uint32_t zone_get_hostid(void *zonep); 691 692 extern char *kmem_vasprintf(const char *fmt, va_list adx); 693 extern char *kmem_asprintf(const char *fmt, ...); 694 #define kmem_strfree(str) kmem_free((str), strlen(str) + 1) 695 #define kmem_strdup(s) strdup(s) 696 697 /* 698 * Hostname information 699 */ 700 extern char hw_serial[]; /* for userland-emulated hostid access */ 701 extern int ddi_strtoul(const char *str, char **nptr, int base, 702 unsigned long *result); 703 704 extern int ddi_strtoull(const char *str, char **nptr, int base, 705 u_longlong_t *result); 706 707 typedef struct utsname utsname_t; 708 extern utsname_t *utsname(void); 709 710 /* ZFS Boot Related stuff. */ 711 712 struct _buf { 713 intptr_t _fd; 714 }; 715 716 struct bootstat { 717 uint64_t st_size; 718 }; 719 720 typedef struct ace_object { 721 uid_t a_who; 722 uint32_t a_access_mask; 723 uint16_t a_flags; 724 uint16_t a_type; 725 uint8_t a_obj_type[16]; 726 uint8_t a_inherit_obj_type[16]; 727 } ace_object_t; 728 729 730 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05 731 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06 732 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07 733 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08 734 735 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr); 736 extern int zfs_secpolicy_rename_perms(const char *from, const char *to, 737 cred_t *cr); 738 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr); 739 extern int secpolicy_zfs(const cred_t *cr); 740 extern int secpolicy_zfs_proc(const cred_t *cr, proc_t *proc); 741 extern zoneid_t getzoneid(void); 742 743 /* SID stuff */ 744 typedef struct ksiddomain { 745 uint_t kd_ref; 746 uint_t kd_len; 747 char *kd_name; 748 } ksiddomain_t; 749 750 ksiddomain_t *ksid_lookupdomain(const char *); 751 void ksiddomain_rele(ksiddomain_t *); 752 753 #define DDI_SLEEP KM_SLEEP 754 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \ 755 sysevent_post_event(_c, _d, _b, "libzpool", _e, _f) 756 757 #define zfs_sleep_until(wakeup) \ 758 do { \ 759 hrtime_t delta = wakeup - gethrtime(); \ 760 struct timespec ts; \ 761 ts.tv_sec = delta / NANOSEC; \ 762 ts.tv_nsec = delta % NANOSEC; \ 763 (void) nanosleep(&ts, NULL); \ 764 } while (0) 765 766 typedef int fstrans_cookie_t; 767 768 extern fstrans_cookie_t spl_fstrans_mark(void); 769 extern void spl_fstrans_unmark(fstrans_cookie_t); 770 extern int __spl_pf_fstrans_check(void); 771 extern int kmem_cache_reap_active(void); 772 773 774 /* 775 * Kernel modules 776 */ 777 #define __init 778 #define __exit 779 780 #endif /* _KERNEL || _STANDALONE */ 781 782 #ifdef __cplusplus 783 }; 784 #endif 785 786 #endif /* _SYS_ZFS_CONTEXT_H */ 787