1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25 * Copyright (c) 2012, 2018 by Delphix. All rights reserved. 26 * Copyright (c) 2012, Joyent, Inc. All rights reserved. 27 */ 28 29 #ifndef _SYS_ZFS_CONTEXT_H 30 #define _SYS_ZFS_CONTEXT_H 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * This code compiles in three different contexts. When __KERNEL__ is defined, 38 * the code uses "unix-like" kernel interfaces. When _STANDALONE is defined, the 39 * code is running in a reduced capacity environment of the boot loader which is 40 * generally a subset of both POSIX and kernel interfaces (with a few unique 41 * interfaces too). When neither are defined, it's in a userland POSIX or 42 * similar environment. 43 */ 44 #if defined(__KERNEL__) || defined(_STANDALONE) 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/misc.h> 55 #include <sys/taskq.h> 56 #include <sys/param.h> 57 #include <sys/disp.h> 58 #include <sys/debug.h> 59 #include <sys/random.h> 60 #include <sys/string.h> 61 #include <sys/byteorder.h> 62 #include <sys/list.h> 63 #include <sys/time.h> 64 #include <sys/zone.h> 65 #include <sys/kstat.h> 66 #include <sys/zfs_debug.h> 67 #include <sys/sysevent.h> 68 #include <sys/sysevent/eventdefs.h> 69 #include <sys/zfs_delay.h> 70 #include <sys/sunddi.h> 71 #include <sys/ctype.h> 72 #include <sys/disp.h> 73 #include <sys/trace.h> 74 #include <sys/procfs_list.h> 75 #include <sys/mod.h> 76 #include <sys/uio_impl.h> 77 #include <sys/zfs_context_os.h> 78 #else /* _KERNEL || _STANDALONE */ 79 80 #define _SYS_MUTEX_H 81 #define _SYS_RWLOCK_H 82 #define _SYS_CONDVAR_H 83 #define _SYS_VNODE_H 84 #define _SYS_VFS_H 85 #define _SYS_SUNDDI_H 86 #define _SYS_CALLB_H 87 88 #include <stdio.h> 89 #include <stdlib.h> 90 #include <stddef.h> 91 #include <stdarg.h> 92 #include <fcntl.h> 93 #include <unistd.h> 94 #include <errno.h> 95 #include <string.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/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 __attribute__((format(printf, 2, 3))); 157 extern void vcmn_err(int, const char *, va_list) 158 __attribute__((format(printf, 2, 0))); 159 extern void panic(const char *, ...) 160 __attribute__((format(printf, 1, 2), noreturn)); 161 extern void vpanic(const char *, va_list) 162 __attribute__((format(printf, 1, 0), noreturn)); 163 164 #define fm_panic panic 165 166 /* 167 * DTrace SDT probes have different signatures in userland than they do in 168 * the kernel. If they're being used in kernel code, re-define them out of 169 * existence for their counterparts in libzpool. 170 * 171 * Here's an example of how to use the set-error probes in userland: 172 * zfs$target:::set-error /arg0 == EBUSY/ {stack();} 173 * 174 * Here's an example of how to use DTRACE_PROBE probes in userland: 175 * If there is a probe declared as follows: 176 * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn); 177 * Then you can use it as follows: 178 * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/ 179 * {printf("%u %p\n", arg1, arg2);} 180 */ 181 182 #ifdef DTRACE_PROBE 183 #undef DTRACE_PROBE 184 #endif /* DTRACE_PROBE */ 185 #define DTRACE_PROBE(a) 186 187 #ifdef DTRACE_PROBE1 188 #undef DTRACE_PROBE1 189 #endif /* DTRACE_PROBE1 */ 190 #define DTRACE_PROBE1(a, b, c) 191 192 #ifdef DTRACE_PROBE2 193 #undef DTRACE_PROBE2 194 #endif /* DTRACE_PROBE2 */ 195 #define DTRACE_PROBE2(a, b, c, d, e) 196 197 #ifdef DTRACE_PROBE3 198 #undef DTRACE_PROBE3 199 #endif /* DTRACE_PROBE3 */ 200 #define DTRACE_PROBE3(a, b, c, d, e, f, g) 201 202 #ifdef DTRACE_PROBE4 203 #undef DTRACE_PROBE4 204 #endif /* DTRACE_PROBE4 */ 205 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) 206 207 /* 208 * Tunables. 209 */ 210 typedef struct zfs_kernel_param { 211 const char *name; /* unused stub */ 212 } zfs_kernel_param_t; 213 214 #define ZFS_MODULE_PARAM(scope_prefix, name_prefix, name, type, perm, desc) 215 #define ZFS_MODULE_PARAM_ARGS void 216 #define ZFS_MODULE_PARAM_CALL(scope_prefix, name_prefix, name, setfunc, \ 217 getfunc, perm, desc) 218 219 /* 220 * Threads. 221 */ 222 typedef pthread_t kthread_t; 223 224 #define TS_RUN 0x00000002 225 #define TS_JOINABLE 0x00000004 226 227 #define curthread ((void *)(uintptr_t)pthread_self()) 228 #define getcomm() "unknown" 229 230 #define thread_create_named(name, stk, stksize, func, arg, len, \ 231 pp, state, pri) \ 232 zk_thread_create(name, func, arg, stksize, state) 233 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 234 zk_thread_create(#func, 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(const char *name, void (*func)(void *), 251 void *arg, size_t stksize, int state); 252 253 #define issig() (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 int mutex_enter_check_return(kmutex_t *mp); 278 extern void mutex_exit(kmutex_t *mp); 279 extern int mutex_tryenter(kmutex_t *mp); 280 281 #define NESTED_SINGLE 1 282 #define mutex_enter_nested(mp, class) mutex_enter(mp) 283 #define mutex_enter_interruptible(mp) mutex_enter_check_return(mp) 284 /* 285 * RW locks 286 */ 287 typedef struct krwlock { 288 pthread_rwlock_t rw_lock; 289 pthread_t rw_owner; 290 uint_t rw_readers; 291 } krwlock_t; 292 293 typedef int krw_t; 294 295 #define RW_READER 0 296 #define RW_WRITER 1 297 #define RW_DEFAULT RW_READER 298 #define RW_NOLOCKDEP RW_READER 299 300 #define RW_READ_HELD(rw) ((rw)->rw_readers > 0) 301 #define RW_WRITE_HELD(rw) pthread_equal((rw)->rw_owner, pthread_self()) 302 #define RW_LOCK_HELD(rw) (RW_READ_HELD(rw) || RW_WRITE_HELD(rw)) 303 304 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 305 extern void rw_destroy(krwlock_t *rwlp); 306 extern void rw_enter(krwlock_t *rwlp, krw_t rw); 307 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 308 extern int rw_tryupgrade(krwlock_t *rwlp); 309 extern void rw_exit(krwlock_t *rwlp); 310 #define rw_downgrade(rwlp) do { } while (0) 311 312 /* 313 * Credentials 314 */ 315 extern uid_t crgetuid(cred_t *cr); 316 extern uid_t crgetruid(cred_t *cr); 317 extern gid_t crgetgid(cred_t *cr); 318 extern int crgetngroups(cred_t *cr); 319 extern gid_t *crgetgroups(cred_t *cr); 320 321 /* 322 * Condition variables 323 */ 324 typedef pthread_cond_t kcondvar_t; 325 326 #define CV_DEFAULT 0 327 #define CALLOUT_FLAG_ABSOLUTE 0x2 328 329 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 330 extern void cv_destroy(kcondvar_t *cv); 331 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 332 extern int cv_wait_sig(kcondvar_t *cv, kmutex_t *mp); 333 extern int cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 334 extern int cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim, 335 hrtime_t res, int flag); 336 extern void cv_signal(kcondvar_t *cv); 337 extern void cv_broadcast(kcondvar_t *cv); 338 339 #define cv_timedwait_io(cv, mp, at) cv_timedwait(cv, mp, at) 340 #define cv_timedwait_idle(cv, mp, at) cv_timedwait(cv, mp, at) 341 #define cv_timedwait_sig(cv, mp, at) cv_timedwait(cv, mp, at) 342 #define cv_wait_io(cv, mp) cv_wait(cv, mp) 343 #define cv_wait_idle(cv, mp) cv_wait(cv, mp) 344 #define cv_wait_io_sig(cv, mp) cv_wait_sig(cv, mp) 345 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \ 346 cv_timedwait_hires(cv, mp, t, r, f) 347 #define cv_timedwait_idle_hires(cv, mp, t, r, f) \ 348 cv_timedwait_hires(cv, mp, t, r, f) 349 350 /* 351 * Thread-specific data 352 */ 353 #define tsd_get(k) pthread_getspecific(k) 354 #define tsd_set(k, v) pthread_setspecific(k, v) 355 #define tsd_create(kp, d) pthread_key_create((pthread_key_t *)kp, d) 356 #define tsd_destroy(kp) /* nothing */ 357 #ifdef __FreeBSD__ 358 typedef off_t loff_t; 359 #endif 360 361 /* 362 * kstat creation, installation and deletion 363 */ 364 extern kstat_t *kstat_create(const char *, int, 365 const char *, const char *, uchar_t, ulong_t, uchar_t); 366 extern void kstat_install(kstat_t *); 367 extern void kstat_delete(kstat_t *); 368 extern void kstat_set_raw_ops(kstat_t *ksp, 369 int (*headers)(char *buf, size_t size), 370 int (*data)(char *buf, size_t size, void *data), 371 void *(*addr)(kstat_t *ksp, loff_t index)); 372 373 /* 374 * procfs list manipulation 375 */ 376 377 typedef struct procfs_list { 378 void *pl_private; 379 kmutex_t pl_lock; 380 list_t pl_list; 381 uint64_t pl_next_id; 382 size_t pl_node_offset; 383 } procfs_list_t; 384 385 #ifndef __cplusplus 386 struct seq_file { }; 387 void seq_printf(struct seq_file *m, const char *fmt, ...); 388 389 typedef struct procfs_list_node { 390 list_node_t pln_link; 391 uint64_t pln_id; 392 } procfs_list_node_t; 393 394 void procfs_list_install(const char *module, 395 const char *submodule, 396 const char *name, 397 mode_t mode, 398 procfs_list_t *procfs_list, 399 int (*show)(struct seq_file *f, void *p), 400 int (*show_header)(struct seq_file *f), 401 int (*clear)(procfs_list_t *procfs_list), 402 size_t procfs_list_node_off); 403 void procfs_list_uninstall(procfs_list_t *procfs_list); 404 void procfs_list_destroy(procfs_list_t *procfs_list); 405 void procfs_list_add(procfs_list_t *procfs_list, void *p); 406 #endif 407 408 /* 409 * Kernel memory 410 */ 411 #define KM_SLEEP UMEM_NOFAIL 412 #define KM_PUSHPAGE KM_SLEEP 413 #define KM_NOSLEEP UMEM_DEFAULT 414 #define KM_NORMALPRI 0 /* not needed with UMEM_DEFAULT */ 415 #define KMC_NODEBUG UMC_NODEBUG 416 #define KMC_KVMEM 0x0 417 #define KMC_RECLAIMABLE 0x0 418 #define kmem_alloc(_s, _f) umem_alloc(_s, _f) 419 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 420 #define kmem_free(_b, _s) umem_free(_b, _s) 421 #define vmem_alloc(_s, _f) kmem_alloc(_s, _f) 422 #define vmem_zalloc(_s, _f) kmem_zalloc(_s, _f) 423 #define vmem_free(_b, _s) kmem_free(_b, _s) 424 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 425 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 426 #define kmem_cache_destroy(_c) umem_cache_destroy(_c) 427 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 428 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 429 #define kmem_debugging() 0 430 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c); 431 #define kmem_cache_set_move(_c, _cb) /* nothing */ 432 #define POINTER_INVALIDATE(_pp) /* nothing */ 433 #define POINTER_IS_VALID(_p) 0 434 435 typedef umem_cache_t kmem_cache_t; 436 437 typedef enum kmem_cbrc { 438 KMEM_CBRC_YES, 439 KMEM_CBRC_NO, 440 KMEM_CBRC_LATER, 441 KMEM_CBRC_DONT_NEED, 442 KMEM_CBRC_DONT_KNOW 443 } kmem_cbrc_t; 444 445 /* 446 * Task queues 447 */ 448 449 #define TASKQ_NAMELEN 31 450 451 typedef uintptr_t taskqid_t; 452 typedef void (task_func_t)(void *); 453 454 typedef struct taskq_ent { 455 struct taskq_ent *tqent_next; 456 struct taskq_ent *tqent_prev; 457 task_func_t *tqent_func; 458 void *tqent_arg; 459 uintptr_t tqent_flags; 460 } taskq_ent_t; 461 462 typedef struct taskq { 463 char tq_name[TASKQ_NAMELEN + 1]; 464 kmutex_t tq_lock; 465 krwlock_t tq_threadlock; 466 kcondvar_t tq_dispatch_cv; 467 kcondvar_t tq_wait_cv; 468 kthread_t **tq_threadlist; 469 int tq_flags; 470 int tq_active; 471 int tq_nthreads; 472 int tq_nalloc; 473 int tq_minalloc; 474 int tq_maxalloc; 475 kcondvar_t tq_maxalloc_cv; 476 int tq_maxalloc_wait; 477 taskq_ent_t *tq_freelist; 478 taskq_ent_t tq_task; 479 } taskq_t; 480 481 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */ 482 483 #define TASKQ_PREPOPULATE 0x0001 484 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 485 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 486 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */ 487 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */ 488 489 #define TQ_SLEEP KM_SLEEP /* Can block for memory */ 490 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 491 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 492 #define TQ_FRONT 0x08 /* Queue in front */ 493 494 #define TASKQID_INVALID ((taskqid_t)0) 495 496 extern taskq_t *system_taskq; 497 extern taskq_t *system_delay_taskq; 498 499 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 500 extern taskq_t *taskq_create_synced(const char *, int, pri_t, int, int, uint_t, 501 kthread_t ***); 502 #define taskq_create_proc(a, b, c, d, e, p, f) \ 503 (taskq_create(a, b, c, d, e, f)) 504 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \ 505 ((void) sizeof (dc), taskq_create(a, b, maxclsyspri, d, e, f)) 506 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 507 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t, 508 clock_t); 509 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, 510 taskq_ent_t *); 511 extern int taskq_empty_ent(taskq_ent_t *); 512 extern void taskq_init_ent(taskq_ent_t *); 513 extern void taskq_destroy(taskq_t *); 514 extern void taskq_wait(taskq_t *); 515 extern void taskq_wait_id(taskq_t *, taskqid_t); 516 extern void taskq_wait_outstanding(taskq_t *, taskqid_t); 517 extern int taskq_member(taskq_t *, kthread_t *); 518 extern taskq_t *taskq_of_curthread(void); 519 extern int taskq_cancel_id(taskq_t *, taskqid_t); 520 extern void system_taskq_init(void); 521 extern void system_taskq_fini(void); 522 523 #define XVA_MAPSIZE 3 524 #define XVA_MAGIC 0x78766174 525 526 extern char *vn_dumpdir; 527 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */ 528 529 typedef struct xoptattr { 530 inode_timespec_t xoa_createtime; /* Create time of file */ 531 uint8_t xoa_archive; 532 uint8_t xoa_system; 533 uint8_t xoa_readonly; 534 uint8_t xoa_hidden; 535 uint8_t xoa_nounlink; 536 uint8_t xoa_immutable; 537 uint8_t xoa_appendonly; 538 uint8_t xoa_nodump; 539 uint8_t xoa_settable; 540 uint8_t xoa_opaque; 541 uint8_t xoa_av_quarantined; 542 uint8_t xoa_av_modified; 543 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ]; 544 uint8_t xoa_reparse; 545 uint8_t xoa_offline; 546 uint8_t xoa_sparse; 547 } xoptattr_t; 548 549 typedef struct vattr { 550 uint_t va_mask; /* bit-mask of attributes */ 551 u_offset_t va_size; /* file size in bytes */ 552 } vattr_t; 553 554 555 typedef struct xvattr { 556 vattr_t xva_vattr; /* Embedded vattr structure */ 557 uint32_t xva_magic; /* Magic Number */ 558 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */ 559 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */ 560 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */ 561 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */ 562 xoptattr_t xva_xoptattrs; /* Optional attributes */ 563 } xvattr_t; 564 565 typedef struct vsecattr { 566 uint_t vsa_mask; /* See below */ 567 int vsa_aclcnt; /* ACL entry count */ 568 void *vsa_aclentp; /* pointer to ACL entries */ 569 int vsa_dfaclcnt; /* default ACL entry count */ 570 void *vsa_dfaclentp; /* pointer to default ACL entries */ 571 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */ 572 } vsecattr_t; 573 574 #define AT_MODE 0x00002 575 #define AT_UID 0x00004 576 #define AT_GID 0x00008 577 #define AT_FSID 0x00010 578 #define AT_NODEID 0x00020 579 #define AT_NLINK 0x00040 580 #define AT_SIZE 0x00080 581 #define AT_ATIME 0x00100 582 #define AT_MTIME 0x00200 583 #define AT_CTIME 0x00400 584 #define AT_RDEV 0x00800 585 #define AT_BLKSIZE 0x01000 586 #define AT_NBLOCKS 0x02000 587 #define AT_SEQ 0x08000 588 #define AT_XVATTR 0x10000 589 590 #define CRCREAT 0 591 592 #define F_FREESP 11 593 #define FIGNORECASE 0x80000 /* request case-insensitive lookups */ 594 595 /* 596 * Random stuff 597 */ 598 #define ddi_get_lbolt() (gethrtime() >> 23) 599 #define ddi_get_lbolt64() (gethrtime() >> 23) 600 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 601 602 #define ddi_time_before(a, b) (a < b) 603 #define ddi_time_after(a, b) ddi_time_before(b, a) 604 #define ddi_time_before_eq(a, b) (!ddi_time_after(a, b)) 605 #define ddi_time_after_eq(a, b) ddi_time_before_eq(b, a) 606 607 #define ddi_time_before64(a, b) (a < b) 608 #define ddi_time_after64(a, b) ddi_time_before64(b, a) 609 #define ddi_time_before_eq64(a, b) (!ddi_time_after64(a, b)) 610 #define ddi_time_after_eq64(a, b) ddi_time_before_eq64(b, a) 611 612 extern void delay(clock_t ticks); 613 614 #define SEC_TO_TICK(sec) ((sec) * hz) 615 #define MSEC_TO_TICK(msec) (howmany((hrtime_t)(msec) * hz, MILLISEC)) 616 #define USEC_TO_TICK(usec) (howmany((hrtime_t)(usec) * hz, MICROSEC)) 617 #define NSEC_TO_TICK(nsec) (howmany((hrtime_t)(nsec) * hz, NANOSEC)) 618 619 #define max_ncpus 64 620 #define boot_ncpus (sysconf(_SC_NPROCESSORS_ONLN)) 621 622 /* 623 * Process priorities as defined by setpriority(2) and getpriority(2). 624 */ 625 #define minclsyspri 19 626 #define defclsyspri 0 627 /* Write issue taskq priority. */ 628 #define wtqclsyspri -19 629 #define maxclsyspri -20 630 631 #define CPU_SEQID ((uintptr_t)pthread_self() & (max_ncpus - 1)) 632 #define CPU_SEQID_UNSTABLE CPU_SEQID 633 634 #define kcred NULL 635 #define CRED() NULL 636 637 #define crhold(cr) ((void)cr) 638 #define crfree(cr) ((void)cr) 639 640 #define ptob(x) ((x) * PAGESIZE) 641 642 #define NN_DIVISOR_1000 (1U << 0) 643 #define NN_NUMBUF_SZ (6) 644 645 extern uint64_t physmem; 646 extern const char *random_path; 647 extern const char *urandom_path; 648 649 extern int highbit64(uint64_t i); 650 extern int lowbit64(uint64_t i); 651 extern int random_get_bytes(uint8_t *ptr, size_t len); 652 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 653 654 static __inline__ uint32_t 655 random_in_range(uint32_t range) 656 { 657 uint32_t r; 658 659 ASSERT(range != 0); 660 661 if (range == 1) 662 return (0); 663 664 (void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r)); 665 666 return (r % range); 667 } 668 669 extern void kernel_init(int mode); 670 extern void kernel_fini(void); 671 extern void random_init(void); 672 extern void random_fini(void); 673 674 struct spa; 675 extern void show_pool_stats(struct spa *); 676 extern int set_global_var(char const *arg); 677 678 typedef struct callb_cpr { 679 kmutex_t *cc_lockp; 680 } callb_cpr_t; 681 682 #define CALLB_CPR_INIT(cp, lockp, func, name) { \ 683 (cp)->cc_lockp = lockp; \ 684 } 685 686 #define CALLB_CPR_SAFE_BEGIN(cp) { \ 687 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 688 } 689 690 #define CALLB_CPR_SAFE_END(cp, lockp) { \ 691 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 692 } 693 694 #define CALLB_CPR_EXIT(cp) { \ 695 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 696 mutex_exit((cp)->cc_lockp); \ 697 } 698 699 #define zone_dataset_visible(x, y) (1) 700 #define INGLOBALZONE(z) (1) 701 extern uint32_t zone_get_hostid(void *zonep); 702 703 extern char *kmem_vasprintf(const char *fmt, va_list adx); 704 extern char *kmem_asprintf(const char *fmt, ...); 705 #define kmem_strfree(str) kmem_free((str), strlen(str) + 1) 706 #define kmem_strdup(s) strdup(s) 707 708 #ifndef __cplusplus 709 extern int kmem_scnprintf(char *restrict str, size_t size, 710 const char *restrict fmt, ...); 711 #endif 712 713 /* 714 * Hostname information 715 */ 716 extern int ddi_strtoull(const char *str, char **nptr, int base, 717 u_longlong_t *result); 718 719 typedef struct utsname utsname_t; 720 extern utsname_t *utsname(void); 721 722 /* ZFS Boot Related stuff. */ 723 724 struct _buf { 725 intptr_t _fd; 726 }; 727 728 struct bootstat { 729 uint64_t st_size; 730 }; 731 732 typedef struct ace_object { 733 uid_t a_who; 734 uint32_t a_access_mask; 735 uint16_t a_flags; 736 uint16_t a_type; 737 uint8_t a_obj_type[16]; 738 uint8_t a_inherit_obj_type[16]; 739 } ace_object_t; 740 741 742 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05 743 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06 744 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07 745 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08 746 747 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr); 748 extern int zfs_secpolicy_rename_perms(const char *from, const char *to, 749 cred_t *cr); 750 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr); 751 extern int secpolicy_zfs(const cred_t *cr); 752 extern zoneid_t getzoneid(void); 753 754 /* SID stuff */ 755 typedef struct ksiddomain { 756 uint_t kd_ref; 757 uint_t kd_len; 758 char *kd_name; 759 } ksiddomain_t; 760 761 ksiddomain_t *ksid_lookupdomain(const char *); 762 void ksiddomain_rele(ksiddomain_t *); 763 764 #define DDI_SLEEP KM_SLEEP 765 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \ 766 sysevent_post_event(_c, _d, _b, "libzpool", _e, _f) 767 768 #define zfs_sleep_until(wakeup) \ 769 do { \ 770 hrtime_t delta = wakeup - gethrtime(); \ 771 struct timespec ts; \ 772 ts.tv_sec = delta / NANOSEC; \ 773 ts.tv_nsec = delta % NANOSEC; \ 774 (void) nanosleep(&ts, NULL); \ 775 } while (0) 776 777 typedef int fstrans_cookie_t; 778 779 extern fstrans_cookie_t spl_fstrans_mark(void); 780 extern void spl_fstrans_unmark(fstrans_cookie_t); 781 extern int __spl_pf_fstrans_check(void); 782 extern int kmem_cache_reap_active(void); 783 784 785 /* 786 * Kernel modules 787 */ 788 #define __init 789 #define __exit 790 791 #endif /* _KERNEL || _STANDALONE */ 792 793 #ifdef __cplusplus 794 }; 795 #endif 796 797 #endif /* _SYS_ZFS_CONTEXT_H */ 798