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 * the kernel. If they're being used in kernel code, re-define them out of 120 * existence for their counterparts in libzpool. 121 * 122 * Here's an example of how to use the set-error probes in userland: 123 * zfs$target:::set-error /arg0 == EBUSY/ {stack();} 124 * 125 * Here's an example of how to use DTRACE_PROBE probes in userland: 126 * If there is a probe declared as follows: 127 * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn); 128 * Then you can use it as follows: 129 * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/ 130 * {printf("%u %p\n", arg1, arg2);} 131 */ 132 133 #ifdef DTRACE_PROBE 134 #undef DTRACE_PROBE 135 #endif /* DTRACE_PROBE */ 136 #define DTRACE_PROBE(a) \ 137 ZFS_PROBE0(#a) 138 139 #ifdef DTRACE_PROBE1 140 #undef DTRACE_PROBE1 141 #endif /* DTRACE_PROBE1 */ 142 #define DTRACE_PROBE1(a, b, c) \ 143 ZFS_PROBE1(#a, (unsigned long)c) 144 145 #ifdef DTRACE_PROBE2 146 #undef DTRACE_PROBE2 147 #endif /* DTRACE_PROBE2 */ 148 #define DTRACE_PROBE2(a, b, c, d, e) \ 149 ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e) 150 151 #ifdef DTRACE_PROBE3 152 #undef DTRACE_PROBE3 153 #endif /* DTRACE_PROBE3 */ 154 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \ 155 ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g) 156 157 #ifdef DTRACE_PROBE4 158 #undef DTRACE_PROBE4 159 #endif /* DTRACE_PROBE4 */ 160 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \ 161 ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \ 162 (unsigned long)i) 163 164 /* 165 * We use the comma operator so that this macro can be used without much 166 * additional code. For example, "return (EINVAL);" becomes 167 * "return (SET_ERROR(EINVAL));". Note that the argument will be evaluated 168 * twice, so it should not have side effects (e.g. something like: 169 * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice). 170 */ 171 #define SET_ERROR(err) (ZFS_SET_ERROR(err), err) 172 173 /* 174 * Threads 175 */ 176 #define curthread ((void *)(uintptr_t)thr_self()) 177 178 #define kpreempt(x) yield() 179 180 typedef struct kthread kthread_t; 181 182 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 183 zk_thread_create(func, arg) 184 #define thread_exit() thr_exit(NULL) 185 #define thread_join(t) panic("libzpool cannot join threads") 186 187 #define newproc(f, a, cid, pri, ctp, pid) (ENOSYS) 188 189 /* in libzpool, p0 exists only to have its address taken */ 190 struct proc { 191 uintptr_t this_is_never_used_dont_dereference_it; 192 }; 193 194 extern struct proc p0; 195 #define curproc (&p0) 196 197 #define PS_NONE -1 198 199 extern kthread_t *zk_thread_create(void (*func)(), void *arg); 200 201 #define issig(why) (FALSE) 202 #define ISSIG(thr, why) (FALSE) 203 204 /* 205 * Mutexes 206 */ 207 typedef struct kmutex { 208 void *m_owner; 209 boolean_t initialized; 210 mutex_t m_lock; 211 } kmutex_t; 212 213 #define MUTEX_DEFAULT USYNC_THREAD 214 #undef MUTEX_HELD 215 #undef MUTEX_NOT_HELD 216 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock) 217 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m)) 218 219 /* 220 * Argh -- we have to get cheesy here because the kernel and userland 221 * have different signatures for the same routine. 222 */ 223 extern int _mutex_init(mutex_t *mp, int type, void *arg); 224 extern int _mutex_destroy(mutex_t *mp); 225 226 #define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp)) 227 #define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp)) 228 #define mutex_enter(mp) zmutex_enter(mp) 229 #define mutex_exit(mp) zmutex_exit(mp) 230 231 extern void zmutex_init(kmutex_t *mp); 232 extern void zmutex_destroy(kmutex_t *mp); 233 extern void zmutex_enter(kmutex_t *mp); 234 extern void zmutex_exit(kmutex_t *mp); 235 extern int mutex_tryenter(kmutex_t *mp); 236 extern void *mutex_owner(kmutex_t *mp); 237 238 /* 239 * RW locks 240 */ 241 typedef struct krwlock { 242 void *rw_owner; 243 boolean_t initialized; 244 rwlock_t rw_lock; 245 } krwlock_t; 246 247 typedef int krw_t; 248 249 #define RW_READER 0 250 #define RW_WRITER 1 251 #define RW_DEFAULT USYNC_THREAD 252 253 #undef RW_READ_HELD 254 #define RW_READ_HELD(x) _rw_read_held(&(x)->rw_lock) 255 256 #undef RW_WRITE_HELD 257 #define RW_WRITE_HELD(x) _rw_write_held(&(x)->rw_lock) 258 259 #undef RW_LOCK_HELD 260 #define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x)) 261 262 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 263 extern void rw_destroy(krwlock_t *rwlp); 264 extern void rw_enter(krwlock_t *rwlp, krw_t rw); 265 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 266 extern int rw_tryupgrade(krwlock_t *rwlp); 267 extern void rw_exit(krwlock_t *rwlp); 268 #define rw_downgrade(rwlp) do { } while (0) 269 270 extern uid_t crgetuid(cred_t *cr); 271 extern uid_t crgetruid(cred_t *cr); 272 extern gid_t crgetgid(cred_t *cr); 273 extern int crgetngroups(cred_t *cr); 274 extern gid_t *crgetgroups(cred_t *cr); 275 276 /* 277 * Condition variables 278 */ 279 typedef cond_t kcondvar_t; 280 281 #define CV_DEFAULT USYNC_THREAD 282 283 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 284 extern void cv_destroy(kcondvar_t *cv); 285 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 286 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 287 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim, 288 hrtime_t res, int flag); 289 extern void cv_signal(kcondvar_t *cv); 290 extern void cv_broadcast(kcondvar_t *cv); 291 292 /* 293 * Thread-specific data 294 */ 295 #define tsd_get(k) pthread_getspecific(k) 296 #define tsd_set(k, v) pthread_setspecific(k, v) 297 #define tsd_create(kp, d) pthread_key_create(kp, d) 298 #define tsd_destroy(kp) /* nothing */ 299 300 /* 301 * kstat creation, installation and deletion 302 */ 303 extern kstat_t *kstat_create(const char *, int, 304 const char *, const char *, uchar_t, ulong_t, uchar_t); 305 extern void kstat_install(kstat_t *); 306 extern void kstat_delete(kstat_t *); 307 extern void kstat_waitq_enter(kstat_io_t *); 308 extern void kstat_waitq_exit(kstat_io_t *); 309 extern void kstat_runq_enter(kstat_io_t *); 310 extern void kstat_runq_exit(kstat_io_t *); 311 extern void kstat_waitq_to_runq(kstat_io_t *); 312 extern void kstat_runq_back_to_waitq(kstat_io_t *); 313 314 /* 315 * Kernel memory 316 */ 317 #define KM_SLEEP UMEM_NOFAIL 318 #define KM_PUSHPAGE KM_SLEEP 319 #define KM_NOSLEEP UMEM_DEFAULT 320 #define KMC_NODEBUG UMC_NODEBUG 321 #define KMC_NOTOUCH 0 /* not needed for userland caches */ 322 #define kmem_alloc(_s, _f) umem_alloc(_s, _f) 323 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 324 #define kmem_free(_b, _s) umem_free(_b, _s) 325 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 326 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 327 #define kmem_cache_destroy(_c) umem_cache_destroy(_c) 328 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 329 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 330 #define kmem_debugging() 0 331 #define kmem_cache_reap_now(_c) /* nothing */ 332 #define kmem_cache_set_move(_c, _cb) /* nothing */ 333 #define vmem_qcache_reap(_v) /* nothing */ 334 #define POINTER_INVALIDATE(_pp) /* nothing */ 335 #define POINTER_IS_VALID(_p) 0 336 337 extern vmem_t *zio_arena; 338 339 typedef umem_cache_t kmem_cache_t; 340 341 typedef enum kmem_cbrc { 342 KMEM_CBRC_YES, 343 KMEM_CBRC_NO, 344 KMEM_CBRC_LATER, 345 KMEM_CBRC_DONT_NEED, 346 KMEM_CBRC_DONT_KNOW 347 } kmem_cbrc_t; 348 349 /* 350 * Task queues 351 */ 352 typedef struct taskq taskq_t; 353 typedef uintptr_t taskqid_t; 354 typedef void (task_func_t)(void *); 355 356 typedef struct taskq_ent { 357 struct taskq_ent *tqent_next; 358 struct taskq_ent *tqent_prev; 359 task_func_t *tqent_func; 360 void *tqent_arg; 361 uintptr_t tqent_flags; 362 } taskq_ent_t; 363 364 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */ 365 366 #define TASKQ_PREPOPULATE 0x0001 367 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 368 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 369 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */ 370 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */ 371 372 #define TQ_SLEEP KM_SLEEP /* Can block for memory */ 373 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 374 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 375 #define TQ_FRONT 0x08 /* Queue in front */ 376 377 378 extern taskq_t *system_taskq; 379 380 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 381 #define taskq_create_proc(a, b, c, d, e, p, f) \ 382 (taskq_create(a, b, c, d, e, f)) 383 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \ 384 (taskq_create(a, b, maxclsyspri, d, e, f)) 385 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 386 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, 387 taskq_ent_t *); 388 extern void taskq_destroy(taskq_t *); 389 extern void taskq_wait(taskq_t *); 390 extern int taskq_member(taskq_t *, void *); 391 extern void system_taskq_init(void); 392 extern void system_taskq_fini(void); 393 394 #define XVA_MAPSIZE 3 395 #define XVA_MAGIC 0x78766174 396 397 /* 398 * vnodes 399 */ 400 typedef struct vnode { 401 uint64_t v_size; 402 int v_fd; 403 char *v_path; 404 int v_dump_fd; 405 } vnode_t; 406 407 extern char *vn_dumpdir; 408 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */ 409 410 typedef struct xoptattr { 411 timestruc_t xoa_createtime; /* Create time of file */ 412 uint8_t xoa_archive; 413 uint8_t xoa_system; 414 uint8_t xoa_readonly; 415 uint8_t xoa_hidden; 416 uint8_t xoa_nounlink; 417 uint8_t xoa_immutable; 418 uint8_t xoa_appendonly; 419 uint8_t xoa_nodump; 420 uint8_t xoa_settable; 421 uint8_t xoa_opaque; 422 uint8_t xoa_av_quarantined; 423 uint8_t xoa_av_modified; 424 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ]; 425 uint8_t xoa_reparse; 426 uint8_t xoa_offline; 427 uint8_t xoa_sparse; 428 } xoptattr_t; 429 430 typedef struct vattr { 431 uint_t va_mask; /* bit-mask of attributes */ 432 u_offset_t va_size; /* file size in bytes */ 433 } vattr_t; 434 435 436 typedef struct xvattr { 437 vattr_t xva_vattr; /* Embedded vattr structure */ 438 uint32_t xva_magic; /* Magic Number */ 439 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */ 440 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */ 441 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */ 442 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */ 443 xoptattr_t xva_xoptattrs; /* Optional attributes */ 444 } xvattr_t; 445 446 typedef struct vsecattr { 447 uint_t vsa_mask; /* See below */ 448 int vsa_aclcnt; /* ACL entry count */ 449 void *vsa_aclentp; /* pointer to ACL entries */ 450 int vsa_dfaclcnt; /* default ACL entry count */ 451 void *vsa_dfaclentp; /* pointer to default ACL entries */ 452 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */ 453 } vsecattr_t; 454 455 #define AT_TYPE 0x00001 456 #define AT_MODE 0x00002 457 #define AT_UID 0x00004 458 #define AT_GID 0x00008 459 #define AT_FSID 0x00010 460 #define AT_NODEID 0x00020 461 #define AT_NLINK 0x00040 462 #define AT_SIZE 0x00080 463 #define AT_ATIME 0x00100 464 #define AT_MTIME 0x00200 465 #define AT_CTIME 0x00400 466 #define AT_RDEV 0x00800 467 #define AT_BLKSIZE 0x01000 468 #define AT_NBLOCKS 0x02000 469 #define AT_SEQ 0x08000 470 #define AT_XVATTR 0x10000 471 472 #define CRCREAT 0 473 474 extern int fop_getattr(vnode_t *vp, vattr_t *vap); 475 476 #define VOP_CLOSE(vp, f, c, o, cr, ct) 0 477 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct) 0 478 #define VOP_GETATTR(vp, vap, fl, cr, ct) fop_getattr((vp), (vap)); 479 480 #define VOP_FSYNC(vp, f, cr, ct) fsync((vp)->v_fd) 481 482 #define VN_RELE(vp) vn_close(vp) 483 484 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp, 485 int x2, int x3); 486 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp, 487 int x2, int x3, vnode_t *vp, int fd); 488 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, 489 offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp); 490 extern void vn_close(vnode_t *vp); 491 492 #define vn_remove(path, x1, x2) remove(path) 493 #define vn_rename(from, to, seg) rename((from), (to)) 494 #define vn_is_readonly(vp) B_FALSE 495 496 extern vnode_t *rootdir; 497 498 #include <sys/file.h> /* for FREAD, FWRITE, etc */ 499 500 /* 501 * Random stuff 502 */ 503 #define ddi_get_lbolt() (gethrtime() >> 23) 504 #define ddi_get_lbolt64() (gethrtime() >> 23) 505 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 506 507 extern void delay(clock_t ticks); 508 509 #define SEC_TO_TICK(sec) ((sec) * hz) 510 #define NSEC_TO_TICK(usec) ((usec) / (NANOSEC / hz)) 511 512 #define gethrestime_sec() time(NULL) 513 #define gethrestime(t) \ 514 do {\ 515 (t)->tv_sec = gethrestime_sec();\ 516 (t)->tv_nsec = 0;\ 517 } while (0); 518 519 #define max_ncpus 64 520 #define boot_ncpus (sysconf(_SC_NPROCESSORS_ONLN)) 521 522 #define minclsyspri 60 523 #define maxclsyspri 99 524 525 #define CPU_SEQID (thr_self() & (max_ncpus - 1)) 526 527 #define kcred NULL 528 #define CRED() NULL 529 530 #define ptob(x) ((x) * PAGESIZE) 531 532 extern uint64_t physmem; 533 534 extern int highbit64(uint64_t i); 535 extern int random_get_bytes(uint8_t *ptr, size_t len); 536 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 537 538 extern void kernel_init(int); 539 extern void kernel_fini(void); 540 541 struct spa; 542 extern void nicenum(uint64_t num, char *buf); 543 extern void show_pool_stats(struct spa *); 544 545 typedef struct callb_cpr { 546 kmutex_t *cc_lockp; 547 } callb_cpr_t; 548 549 #define CALLB_CPR_INIT(cp, lockp, func, name) { \ 550 (cp)->cc_lockp = lockp; \ 551 } 552 553 #define CALLB_CPR_SAFE_BEGIN(cp) { \ 554 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 555 } 556 557 #define CALLB_CPR_SAFE_END(cp, lockp) { \ 558 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 559 } 560 561 #define CALLB_CPR_EXIT(cp) { \ 562 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 563 mutex_exit((cp)->cc_lockp); \ 564 } 565 566 #define zone_dataset_visible(x, y) (1) 567 #define INGLOBALZONE(z) (1) 568 569 extern char *kmem_asprintf(const char *fmt, ...); 570 #define strfree(str) kmem_free((str), strlen(str) + 1) 571 572 /* 573 * Hostname information 574 */ 575 extern char hw_serial[]; /* for userland-emulated hostid access */ 576 extern int ddi_strtoul(const char *str, char **nptr, int base, 577 unsigned long *result); 578 579 extern int ddi_strtoull(const char *str, char **nptr, int base, 580 u_longlong_t *result); 581 582 /* ZFS Boot Related stuff. */ 583 584 struct _buf { 585 intptr_t _fd; 586 }; 587 588 struct bootstat { 589 uint64_t st_size; 590 }; 591 592 typedef struct ace_object { 593 uid_t a_who; 594 uint32_t a_access_mask; 595 uint16_t a_flags; 596 uint16_t a_type; 597 uint8_t a_obj_type[16]; 598 uint8_t a_inherit_obj_type[16]; 599 } ace_object_t; 600 601 602 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05 603 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06 604 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07 605 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08 606 607 extern struct _buf *kobj_open_file(char *name); 608 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size, 609 unsigned off); 610 extern void kobj_close_file(struct _buf *file); 611 extern int kobj_get_filesize(struct _buf *file, uint64_t *size); 612 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr); 613 extern int zfs_secpolicy_rename_perms(const char *from, const char *to, 614 cred_t *cr); 615 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr); 616 extern zoneid_t getzoneid(void); 617 618 /* SID stuff */ 619 typedef struct ksiddomain { 620 uint_t kd_ref; 621 uint_t kd_len; 622 char *kd_name; 623 } ksiddomain_t; 624 625 ksiddomain_t *ksid_lookupdomain(const char *); 626 void ksiddomain_rele(ksiddomain_t *); 627 628 #define DDI_SLEEP KM_SLEEP 629 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \ 630 sysevent_post_event(_c, _d, _b, "libzpool", _e, _f) 631 632 /* 633 * Cyclic information 634 */ 635 extern kmutex_t cpu_lock; 636 637 typedef uintptr_t cyclic_id_t; 638 typedef uint16_t cyc_level_t; 639 typedef void (*cyc_func_t)(void *); 640 641 #define CY_LOW_LEVEL 0 642 #define CY_INFINITY INT64_MAX 643 #define CYCLIC_NONE ((cyclic_id_t)0) 644 645 typedef struct cyc_time { 646 hrtime_t cyt_when; 647 hrtime_t cyt_interval; 648 } cyc_time_t; 649 650 typedef struct cyc_handler { 651 cyc_func_t cyh_func; 652 void *cyh_arg; 653 cyc_level_t cyh_level; 654 } cyc_handler_t; 655 656 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *); 657 extern void cyclic_remove(cyclic_id_t); 658 extern int cyclic_reprogram(cyclic_id_t, hrtime_t); 659 660 /* 661 * Buf structure 662 */ 663 #define B_BUSY 0x0001 664 #define B_DONE 0x0002 665 #define B_ERROR 0x0004 666 #define B_READ 0x0040 /* read when I/O occurs */ 667 #define B_WRITE 0x0100 /* non-read pseudo-flag */ 668 669 typedef struct buf { 670 int b_flags; 671 size_t b_bcount; 672 union { 673 caddr_t b_addr; 674 } b_un; 675 676 lldaddr_t _b_blkno; 677 #define b_lblkno _b_blkno._f 678 size_t b_resid; 679 size_t b_bufsize; 680 int (*b_iodone)(struct buf *); 681 int b_error; 682 void *b_private; 683 } buf_t; 684 685 extern void bioinit(buf_t *); 686 extern void biodone(buf_t *); 687 extern void bioerror(buf_t *, int); 688 extern int geterror(buf_t *); 689 690 #ifdef __cplusplus 691 } 692 #endif 693 694 #endif /* _SYS_ZFS_CONTEXT_H */ 695