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, 2014 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 #define _SYS_MUTEX_H 36 #define _SYS_RWLOCK_H 37 #define _SYS_CONDVAR_H 38 #define _SYS_SYSTM_H 39 #define _SYS_T_LOCK_H 40 #define _SYS_VNODE_H 41 #define _SYS_VFS_H 42 #define _SYS_SUNDDI_H 43 #define _SYS_CALLB_H 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <stddef.h> 48 #include <stdarg.h> 49 #include <fcntl.h> 50 #include <unistd.h> 51 #include <errno.h> 52 #include <string.h> 53 #include <strings.h> 54 #include <synch.h> 55 #include <thread.h> 56 #include <assert.h> 57 #include <alloca.h> 58 #include <umem.h> 59 #include <limits.h> 60 #include <atomic.h> 61 #include <dirent.h> 62 #include <time.h> 63 #include <procfs.h> 64 #include <pthread.h> 65 #include <sys/debug.h> 66 #include <libsysevent.h> 67 #include <sys/note.h> 68 #include <sys/types.h> 69 #include <sys/cred.h> 70 #include <sys/sysmacros.h> 71 #include <sys/bitmap.h> 72 #include <sys/resource.h> 73 #include <sys/byteorder.h> 74 #include <sys/list.h> 75 #include <sys/uio.h> 76 #include <sys/zfs_debug.h> 77 #include <sys/sdt.h> 78 #include <sys/kstat.h> 79 #include <sys/u8_textprep.h> 80 #include <sys/sysevent/eventdefs.h> 81 #include <sys/sysevent/dev.h> 82 #include <sys/sunddi.h> 83 #include <sys/debug.h> 84 #include "zfs.h" 85 86 /* 87 * Debugging 88 */ 89 90 /* 91 * Note that we are not using the debugging levels. 92 */ 93 94 #define CE_CONT 0 /* continuation */ 95 #define CE_NOTE 1 /* notice */ 96 #define CE_WARN 2 /* warning */ 97 #define CE_PANIC 3 /* panic */ 98 #define CE_IGNORE 4 /* print nothing */ 99 100 /* 101 * ZFS debugging 102 */ 103 104 #ifdef ZFS_DEBUG 105 extern void dprintf_setup(int *argc, char **argv); 106 #endif /* ZFS_DEBUG */ 107 108 extern void cmn_err(int, const char *, ...); 109 extern void vcmn_err(int, const char *, __va_list); 110 extern void panic(const char *, ...); 111 extern void vpanic(const char *, __va_list); 112 113 #define fm_panic panic 114 115 extern int aok; 116 117 /* 118 * DTrace SDT probes have different signatures in userland than they do in 119 * kernel. If they're being used in kernel code, re-define them out of 120 * existence for their counterparts in libzpool. 121 */ 122 123 #ifdef DTRACE_PROBE 124 #undef DTRACE_PROBE 125 #endif /* DTRACE_PROBE */ 126 #define DTRACE_PROBE(a) \ 127 ZFS_PROBE0(#a) 128 129 #ifdef DTRACE_PROBE1 130 #undef DTRACE_PROBE1 131 #endif /* DTRACE_PROBE1 */ 132 #define DTRACE_PROBE1(a, b, c) \ 133 ZFS_PROBE1(#a, (unsigned long)c) 134 135 #ifdef DTRACE_PROBE2 136 #undef DTRACE_PROBE2 137 #endif /* DTRACE_PROBE2 */ 138 #define DTRACE_PROBE2(a, b, c, d, e) \ 139 ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e) 140 141 #ifdef DTRACE_PROBE3 142 #undef DTRACE_PROBE3 143 #endif /* DTRACE_PROBE3 */ 144 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \ 145 ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g) 146 147 #ifdef DTRACE_PROBE4 148 #undef DTRACE_PROBE4 149 #endif /* DTRACE_PROBE4 */ 150 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \ 151 ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \ 152 (unsigned long)i) 153 154 /* 155 * We use the comma operator so that this macro can be used without much 156 * additional code. For example, "return (EINVAL);" becomes 157 * "return (SET_ERROR(EINVAL));". Note that the argument will be evaluated 158 * twice, so it should not have side effects (e.g. something like: 159 * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice). 160 */ 161 #define SET_ERROR(err) (ZFS_SET_ERROR(err), err) 162 163 /* 164 * Threads 165 */ 166 #define curthread ((void *)(uintptr_t)thr_self()) 167 168 #define kpreempt(x) yield() 169 170 typedef struct kthread kthread_t; 171 172 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 173 zk_thread_create(func, arg) 174 #define thread_exit() thr_exit(NULL) 175 #define thread_join(t) panic("libzpool cannot join threads") 176 177 #define newproc(f, a, cid, pri, ctp, pid) (ENOSYS) 178 179 /* in libzpool, p0 exists only to have its address taken */ 180 struct proc { 181 uintptr_t this_is_never_used_dont_dereference_it; 182 }; 183 184 extern struct proc p0; 185 #define curproc (&p0) 186 187 #define PS_NONE -1 188 189 extern kthread_t *zk_thread_create(void (*func)(), void *arg); 190 191 #define issig(why) (FALSE) 192 #define ISSIG(thr, why) (FALSE) 193 194 /* 195 * Mutexes 196 */ 197 typedef struct kmutex { 198 void *m_owner; 199 boolean_t initialized; 200 mutex_t m_lock; 201 } kmutex_t; 202 203 #define MUTEX_DEFAULT USYNC_THREAD 204 #undef MUTEX_HELD 205 #undef MUTEX_NOT_HELD 206 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock) 207 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m)) 208 209 /* 210 * Argh -- we have to get cheesy here because the kernel and userland 211 * have different signatures for the same routine. 212 */ 213 extern int _mutex_init(mutex_t *mp, int type, void *arg); 214 extern int _mutex_destroy(mutex_t *mp); 215 216 #define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp)) 217 #define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp)) 218 219 extern void zmutex_init(kmutex_t *mp); 220 extern void zmutex_destroy(kmutex_t *mp); 221 extern void mutex_enter(kmutex_t *mp); 222 extern void mutex_exit(kmutex_t *mp); 223 extern int mutex_tryenter(kmutex_t *mp); 224 extern void *mutex_owner(kmutex_t *mp); 225 226 /* 227 * RW locks 228 */ 229 typedef struct krwlock { 230 void *rw_owner; 231 boolean_t initialized; 232 rwlock_t rw_lock; 233 } krwlock_t; 234 235 typedef int krw_t; 236 237 #define RW_READER 0 238 #define RW_WRITER 1 239 #define RW_DEFAULT USYNC_THREAD 240 241 #undef RW_READ_HELD 242 #define RW_READ_HELD(x) _rw_read_held(&(x)->rw_lock) 243 244 #undef RW_WRITE_HELD 245 #define RW_WRITE_HELD(x) _rw_write_held(&(x)->rw_lock) 246 247 #undef RW_LOCK_HELD 248 #define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x)) 249 250 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 251 extern void rw_destroy(krwlock_t *rwlp); 252 extern void rw_enter(krwlock_t *rwlp, krw_t rw); 253 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 254 extern int rw_tryupgrade(krwlock_t *rwlp); 255 extern void rw_exit(krwlock_t *rwlp); 256 #define rw_downgrade(rwlp) do { } while (0) 257 258 extern uid_t crgetuid(cred_t *cr); 259 extern uid_t crgetruid(cred_t *cr); 260 extern gid_t crgetgid(cred_t *cr); 261 extern int crgetngroups(cred_t *cr); 262 extern gid_t *crgetgroups(cred_t *cr); 263 264 /* 265 * Condition variables 266 */ 267 typedef cond_t kcondvar_t; 268 269 #define CV_DEFAULT USYNC_THREAD 270 271 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 272 extern void cv_destroy(kcondvar_t *cv); 273 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 274 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 275 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim, 276 hrtime_t res, int flag); 277 extern void cv_signal(kcondvar_t *cv); 278 extern void cv_broadcast(kcondvar_t *cv); 279 280 /* 281 * Thread-specific data 282 */ 283 #define tsd_get(k) pthread_getspecific(k) 284 #define tsd_set(k, v) pthread_setspecific(k, v) 285 #define tsd_create(kp, d) pthread_key_create(kp, d) 286 #define tsd_destroy(kp) /* nothing */ 287 288 /* 289 * kstat creation, installation and deletion 290 */ 291 extern kstat_t *kstat_create(const char *, int, 292 const char *, const char *, uchar_t, ulong_t, uchar_t); 293 extern void kstat_install(kstat_t *); 294 extern void kstat_delete(kstat_t *); 295 extern void kstat_waitq_enter(kstat_io_t *); 296 extern void kstat_waitq_exit(kstat_io_t *); 297 extern void kstat_runq_enter(kstat_io_t *); 298 extern void kstat_runq_exit(kstat_io_t *); 299 extern void kstat_waitq_to_runq(kstat_io_t *); 300 extern void kstat_runq_back_to_waitq(kstat_io_t *); 301 302 /* 303 * Kernel memory 304 */ 305 #define KM_SLEEP UMEM_NOFAIL 306 #define KM_PUSHPAGE KM_SLEEP 307 #define KM_NOSLEEP UMEM_DEFAULT 308 #define KMC_NODEBUG UMC_NODEBUG 309 #define KMC_NOTOUCH 0 /* not needed for userland caches */ 310 #define kmem_alloc(_s, _f) umem_alloc(_s, _f) 311 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 312 #define kmem_free(_b, _s) umem_free(_b, _s) 313 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 314 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 315 #define kmem_cache_destroy(_c) umem_cache_destroy(_c) 316 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 317 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 318 #define kmem_debugging() 0 319 #define kmem_cache_reap_now(_c) /* nothing */ 320 #define kmem_cache_set_move(_c, _cb) /* nothing */ 321 #define vmem_qcache_reap(_v) /* nothing */ 322 #define POINTER_INVALIDATE(_pp) /* nothing */ 323 #define POINTER_IS_VALID(_p) 0 324 325 extern vmem_t *zio_arena; 326 327 typedef umem_cache_t kmem_cache_t; 328 329 typedef enum kmem_cbrc { 330 KMEM_CBRC_YES, 331 KMEM_CBRC_NO, 332 KMEM_CBRC_LATER, 333 KMEM_CBRC_DONT_NEED, 334 KMEM_CBRC_DONT_KNOW 335 } kmem_cbrc_t; 336 337 /* 338 * Task queues 339 */ 340 typedef struct taskq taskq_t; 341 typedef uintptr_t taskqid_t; 342 typedef void (task_func_t)(void *); 343 344 typedef struct taskq_ent { 345 struct taskq_ent *tqent_next; 346 struct taskq_ent *tqent_prev; 347 task_func_t *tqent_func; 348 void *tqent_arg; 349 uintptr_t tqent_flags; 350 } taskq_ent_t; 351 352 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */ 353 354 #define TASKQ_PREPOPULATE 0x0001 355 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 356 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 357 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */ 358 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */ 359 360 #define TQ_SLEEP KM_SLEEP /* Can block for memory */ 361 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 362 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 363 #define TQ_FRONT 0x08 /* Queue in front */ 364 365 366 extern taskq_t *system_taskq; 367 368 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 369 #define taskq_create_proc(a, b, c, d, e, p, f) \ 370 (taskq_create(a, b, c, d, e, f)) 371 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \ 372 (taskq_create(a, b, maxclsyspri, d, e, f)) 373 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 374 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, 375 taskq_ent_t *); 376 extern void taskq_destroy(taskq_t *); 377 extern void taskq_wait(taskq_t *); 378 extern int taskq_member(taskq_t *, void *); 379 extern void system_taskq_init(void); 380 extern void system_taskq_fini(void); 381 382 #define XVA_MAPSIZE 3 383 #define XVA_MAGIC 0x78766174 384 385 /* 386 * vnodes 387 */ 388 typedef struct vnode { 389 uint64_t v_size; 390 int v_fd; 391 char *v_path; 392 int v_dump_fd; 393 } vnode_t; 394 395 extern char *vn_dumpdir; 396 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */ 397 398 typedef struct xoptattr { 399 timestruc_t xoa_createtime; /* Create time of file */ 400 uint8_t xoa_archive; 401 uint8_t xoa_system; 402 uint8_t xoa_readonly; 403 uint8_t xoa_hidden; 404 uint8_t xoa_nounlink; 405 uint8_t xoa_immutable; 406 uint8_t xoa_appendonly; 407 uint8_t xoa_nodump; 408 uint8_t xoa_settable; 409 uint8_t xoa_opaque; 410 uint8_t xoa_av_quarantined; 411 uint8_t xoa_av_modified; 412 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ]; 413 uint8_t xoa_reparse; 414 uint8_t xoa_offline; 415 uint8_t xoa_sparse; 416 } xoptattr_t; 417 418 typedef struct vattr { 419 uint_t va_mask; /* bit-mask of attributes */ 420 u_offset_t va_size; /* file size in bytes */ 421 } vattr_t; 422 423 424 typedef struct xvattr { 425 vattr_t xva_vattr; /* Embedded vattr structure */ 426 uint32_t xva_magic; /* Magic Number */ 427 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */ 428 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */ 429 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */ 430 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */ 431 xoptattr_t xva_xoptattrs; /* Optional attributes */ 432 } xvattr_t; 433 434 typedef struct vsecattr { 435 uint_t vsa_mask; /* See below */ 436 int vsa_aclcnt; /* ACL entry count */ 437 void *vsa_aclentp; /* pointer to ACL entries */ 438 int vsa_dfaclcnt; /* default ACL entry count */ 439 void *vsa_dfaclentp; /* pointer to default ACL entries */ 440 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */ 441 } vsecattr_t; 442 443 #define AT_TYPE 0x00001 444 #define AT_MODE 0x00002 445 #define AT_UID 0x00004 446 #define AT_GID 0x00008 447 #define AT_FSID 0x00010 448 #define AT_NODEID 0x00020 449 #define AT_NLINK 0x00040 450 #define AT_SIZE 0x00080 451 #define AT_ATIME 0x00100 452 #define AT_MTIME 0x00200 453 #define AT_CTIME 0x00400 454 #define AT_RDEV 0x00800 455 #define AT_BLKSIZE 0x01000 456 #define AT_NBLOCKS 0x02000 457 #define AT_SEQ 0x08000 458 #define AT_XVATTR 0x10000 459 460 #define CRCREAT 0 461 462 extern int fop_getattr(vnode_t *vp, vattr_t *vap); 463 464 #define VOP_CLOSE(vp, f, c, o, cr, ct) 0 465 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct) 0 466 #define VOP_GETATTR(vp, vap, fl, cr, ct) fop_getattr((vp), (vap)); 467 468 #define VOP_FSYNC(vp, f, cr, ct) fsync((vp)->v_fd) 469 470 #define VN_RELE(vp) vn_close(vp) 471 472 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp, 473 int x2, int x3); 474 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp, 475 int x2, int x3, vnode_t *vp, int fd); 476 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, 477 offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp); 478 extern void vn_close(vnode_t *vp); 479 480 #define vn_remove(path, x1, x2) remove(path) 481 #define vn_rename(from, to, seg) rename((from), (to)) 482 #define vn_is_readonly(vp) B_FALSE 483 484 extern vnode_t *rootdir; 485 486 #include <sys/file.h> /* for FREAD, FWRITE, etc */ 487 488 /* 489 * Random stuff 490 */ 491 #define ddi_get_lbolt() (gethrtime() >> 23) 492 #define ddi_get_lbolt64() (gethrtime() >> 23) 493 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 494 495 extern void delay(clock_t ticks); 496 497 #define SEC_TO_TICK(sec) ((sec) * hz) 498 #define NSEC_TO_TICK(usec) ((usec) / (NANOSEC / hz)) 499 500 #define gethrestime_sec() time(NULL) 501 #define gethrestime(t) \ 502 do {\ 503 (t)->tv_sec = gethrestime_sec();\ 504 (t)->tv_nsec = 0;\ 505 } while (0); 506 507 #define max_ncpus 64 508 509 #define minclsyspri 60 510 #define maxclsyspri 99 511 512 #define CPU_SEQID (thr_self() & (max_ncpus - 1)) 513 514 #define kcred NULL 515 #define CRED() NULL 516 517 #define ptob(x) ((x) * PAGESIZE) 518 519 extern uint64_t physmem; 520 521 extern int highbit64(uint64_t i); 522 extern int random_get_bytes(uint8_t *ptr, size_t len); 523 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 524 525 extern void kernel_init(int); 526 extern void kernel_fini(void); 527 528 struct spa; 529 extern void nicenum(uint64_t num, char *buf); 530 extern void show_pool_stats(struct spa *); 531 532 typedef struct callb_cpr { 533 kmutex_t *cc_lockp; 534 } callb_cpr_t; 535 536 #define CALLB_CPR_INIT(cp, lockp, func, name) { \ 537 (cp)->cc_lockp = lockp; \ 538 } 539 540 #define CALLB_CPR_SAFE_BEGIN(cp) { \ 541 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 542 } 543 544 #define CALLB_CPR_SAFE_END(cp, lockp) { \ 545 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 546 } 547 548 #define CALLB_CPR_EXIT(cp) { \ 549 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 550 mutex_exit((cp)->cc_lockp); \ 551 } 552 553 #define zone_dataset_visible(x, y) (1) 554 #define INGLOBALZONE(z) (1) 555 556 extern char *kmem_asprintf(const char *fmt, ...); 557 #define strfree(str) kmem_free((str), strlen(str) + 1) 558 559 /* 560 * Hostname information 561 */ 562 extern char hw_serial[]; /* for userland-emulated hostid access */ 563 extern int ddi_strtoul(const char *str, char **nptr, int base, 564 unsigned long *result); 565 566 extern int ddi_strtoull(const char *str, char **nptr, int base, 567 u_longlong_t *result); 568 569 /* ZFS Boot Related stuff. */ 570 571 struct _buf { 572 intptr_t _fd; 573 }; 574 575 struct bootstat { 576 uint64_t st_size; 577 }; 578 579 typedef struct ace_object { 580 uid_t a_who; 581 uint32_t a_access_mask; 582 uint16_t a_flags; 583 uint16_t a_type; 584 uint8_t a_obj_type[16]; 585 uint8_t a_inherit_obj_type[16]; 586 } ace_object_t; 587 588 589 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05 590 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06 591 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07 592 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08 593 594 extern struct _buf *kobj_open_file(char *name); 595 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size, 596 unsigned off); 597 extern void kobj_close_file(struct _buf *file); 598 extern int kobj_get_filesize(struct _buf *file, uint64_t *size); 599 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr); 600 extern int zfs_secpolicy_rename_perms(const char *from, const char *to, 601 cred_t *cr); 602 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr); 603 extern zoneid_t getzoneid(void); 604 605 /* SID stuff */ 606 typedef struct ksiddomain { 607 uint_t kd_ref; 608 uint_t kd_len; 609 char *kd_name; 610 } ksiddomain_t; 611 612 ksiddomain_t *ksid_lookupdomain(const char *); 613 void ksiddomain_rele(ksiddomain_t *); 614 615 #define DDI_SLEEP KM_SLEEP 616 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \ 617 sysevent_post_event(_c, _d, _b, "libzpool", _e, _f) 618 619 /* 620 * Cyclic information 621 */ 622 extern kmutex_t cpu_lock; 623 624 typedef uintptr_t cyclic_id_t; 625 typedef uint16_t cyc_level_t; 626 typedef void (*cyc_func_t)(void *); 627 628 #define CY_LOW_LEVEL 0 629 #define CY_INFINITY INT64_MAX 630 #define CYCLIC_NONE ((cyclic_id_t)0) 631 632 typedef struct cyc_time { 633 hrtime_t cyt_when; 634 hrtime_t cyt_interval; 635 } cyc_time_t; 636 637 typedef struct cyc_handler { 638 cyc_func_t cyh_func; 639 void *cyh_arg; 640 cyc_level_t cyh_level; 641 } cyc_handler_t; 642 643 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *); 644 extern void cyclic_remove(cyclic_id_t); 645 extern int cyclic_reprogram(cyclic_id_t, hrtime_t); 646 647 /* 648 * Buf structure 649 */ 650 #define B_BUSY 0x0001 651 #define B_DONE 0x0002 652 #define B_ERROR 0x0004 653 #define B_READ 0x0040 /* read when I/O occurs */ 654 #define B_WRITE 0x0100 /* non-read pseudo-flag */ 655 656 typedef struct buf { 657 int b_flags; 658 size_t b_bcount; 659 union { 660 caddr_t b_addr; 661 } b_un; 662 663 lldaddr_t _b_blkno; 664 #define b_lblkno _b_blkno._f 665 size_t b_resid; 666 size_t b_bufsize; 667 int (*b_iodone)(struct buf *); 668 int b_error; 669 void *b_private; 670 } buf_t; 671 672 extern void bioinit(buf_t *); 673 extern void biodone(buf_t *); 674 extern void bioerror(buf_t *, int); 675 extern int geterror(buf_t *); 676 677 #ifdef __cplusplus 678 } 679 #endif 680 681 #endif /* _SYS_ZFS_CONTEXT_H */ 682