zfs_context.h revision 263393
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 (c) 2013 by Delphix. All rights reserved. 24 * Copyright (c) 2012, Joyent, Inc. All rights reserved. 25 */ 26/* 27 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 28 */ 29 30#ifndef _SYS_ZFS_CONTEXT_H 31#define _SYS_ZFS_CONTEXT_H 32 33#ifdef __cplusplus 34extern "C" { 35#endif 36 37#define _SYS_MUTEX_H 38#define _SYS_RWLOCK_H 39#define _SYS_CONDVAR_H 40#define _SYS_SYSTM_H 41#define _SYS_T_LOCK_H 42#define _SYS_VNODE_H 43#define _SYS_VFS_H 44#define _SYS_SUNDDI_H 45#define _SYS_CALLB_H 46#define _SYS_SCHED_H_ 47 48#include <solaris.h> 49#include <stdio.h> 50#include <stdlib.h> 51#include <stddef.h> 52#include <stdarg.h> 53#include <fcntl.h> 54#include <unistd.h> 55#include <errno.h> 56#include <string.h> 57#include <strings.h> 58#include <thread.h> 59#include <assert.h> 60#include <limits.h> 61#include <dirent.h> 62#include <time.h> 63#include <math.h> 64#include <umem.h> 65#include <inttypes.h> 66#include <fsshare.h> 67#include <pthread.h> 68#include <sched.h> 69#include <sys/debug.h> 70#include <sys/note.h> 71#include <sys/types.h> 72#include <sys/cred.h> 73#include <sys/atomic.h> 74#include <sys/sysmacros.h> 75#include <sys/bitmap.h> 76#include <sys/resource.h> 77#include <sys/byteorder.h> 78#include <sys/list.h> 79#include <sys/time.h> 80#include <sys/uio.h> 81#include <sys/mntent.h> 82#include <sys/mnttab.h> 83#include <sys/zfs_debug.h> 84#include <sys/sdt.h> 85#include <sys/kstat.h> 86#include <sys/u8_textprep.h> 87#include <sys/kernel.h> 88#include <sys/disk.h> 89#include <sys/sysevent.h> 90#include <sys/sysevent/eventdefs.h> 91#include <sys/sysevent/dev.h> 92#include <machine/atomic.h> 93#include <sys/debug.h> 94#ifdef illumos 95#include "zfs.h" 96#endif 97 98#define ZFS_EXPORTS_PATH "/etc/zfs/exports" 99 100/* 101 * Debugging 102 */ 103 104/* 105 * Note that we are not using the debugging levels. 106 */ 107 108#define CE_CONT 0 /* continuation */ 109#define CE_NOTE 1 /* notice */ 110#define CE_WARN 2 /* warning */ 111#define CE_PANIC 3 /* panic */ 112#define CE_IGNORE 4 /* print nothing */ 113 114/* 115 * ZFS debugging 116 */ 117 118#define ZFS_LOG(...) do { } while (0) 119 120typedef u_longlong_t rlim64_t; 121#define RLIM64_INFINITY ((rlim64_t)-3) 122 123#ifdef ZFS_DEBUG 124extern void dprintf_setup(int *argc, char **argv); 125#endif /* ZFS_DEBUG */ 126 127extern void cmn_err(int, const char *, ...); 128extern void vcmn_err(int, const char *, __va_list); 129extern void panic(const char *, ...); 130extern void vpanic(const char *, __va_list); 131 132#define fm_panic panic 133 134extern int aok; 135 136/* 137 * DTrace SDT probes have different signatures in userland than they do in 138 * kernel. If they're being used in kernel code, re-define them out of 139 * existence for their counterparts in libzpool. 140 */ 141 142#ifdef DTRACE_PROBE 143#undef DTRACE_PROBE 144#endif /* DTRACE_PROBE */ 145#ifdef illumos 146#define DTRACE_PROBE(a) \ 147 ZFS_PROBE0(#a) 148#endif 149 150#ifdef DTRACE_PROBE1 151#undef DTRACE_PROBE1 152#endif /* DTRACE_PROBE1 */ 153#ifdef illumos 154#define DTRACE_PROBE1(a, b, c) \ 155 ZFS_PROBE1(#a, (unsigned long)c) 156#endif 157 158#ifdef DTRACE_PROBE2 159#undef DTRACE_PROBE2 160#endif /* DTRACE_PROBE2 */ 161#ifdef illumos 162#define DTRACE_PROBE2(a, b, c, d, e) \ 163 ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e) 164#endif 165 166#ifdef DTRACE_PROBE3 167#undef DTRACE_PROBE3 168#endif /* DTRACE_PROBE3 */ 169#ifdef illumos 170#define DTRACE_PROBE3(a, b, c, d, e, f, g) \ 171 ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g) 172#endif 173 174#ifdef DTRACE_PROBE4 175#undef DTRACE_PROBE4 176#endif /* DTRACE_PROBE4 */ 177#ifdef illumos 178#define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \ 179 ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \ 180 (unsigned long)i) 181#endif 182 183#ifdef illumos 184/* 185 * We use the comma operator so that this macro can be used without much 186 * additional code. For example, "return (EINVAL);" becomes 187 * "return (SET_ERROR(EINVAL));". Note that the argument will be evaluated 188 * twice, so it should not have side effects (e.g. something like: 189 * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice). 190 */ 191#define SET_ERROR(err) (ZFS_SET_ERROR(err), err) 192#else /* !illumos */ 193 194#define DTRACE_PROBE(a) ((void)0) 195#define DTRACE_PROBE1(a, b, c) ((void)0) 196#define DTRACE_PROBE2(a, b, c, d, e) ((void)0) 197#define DTRACE_PROBE3(a, b, c, d, e, f, g) ((void)0) 198#define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) ((void)0) 199 200#define SET_ERROR(err) (err) 201#endif /* !illumos */ 202 203/* 204 * Threads 205 */ 206#define curthread ((void *)(uintptr_t)thr_self()) 207 208#define kpreempt(x) sched_yield() 209 210typedef struct kthread kthread_t; 211 212#define thread_create(stk, stksize, func, arg, len, pp, state, pri) \ 213 zk_thread_create(func, arg) 214#define thread_exit() thr_exit(NULL) 215#define thread_join(t) panic("libzpool cannot join threads") 216 217#define newproc(f, a, cid, pri, ctp, pid) (ENOSYS) 218 219/* in libzpool, p0 exists only to have its address taken */ 220struct proc { 221 uintptr_t this_is_never_used_dont_dereference_it; 222}; 223 224extern struct proc p0; 225#define curproc (&p0) 226 227#define PS_NONE -1 228 229extern kthread_t *zk_thread_create(void (*func)(), void *arg); 230 231#define issig(why) (FALSE) 232#define ISSIG(thr, why) (FALSE) 233 234/* 235 * Mutexes 236 */ 237typedef struct kmutex { 238 void *m_owner; 239 boolean_t initialized; 240 mutex_t m_lock; 241} kmutex_t; 242 243#define MUTEX_DEFAULT USYNC_THREAD 244#undef MUTEX_HELD 245#undef MUTEX_NOT_HELD 246#define MUTEX_HELD(m) ((m)->m_owner == curthread) 247#define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m)) 248#define _mutex_held(m) pthread_mutex_isowned_np(m) 249 250/* 251 * Argh -- we have to get cheesy here because the kernel and userland 252 * have different signatures for the same routine. 253 */ 254//extern int _mutex_init(mutex_t *mp, int type, void *arg); 255//extern int _mutex_destroy(mutex_t *mp); 256//extern int _mutex_owned(mutex_t *mp); 257 258#define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp)) 259#define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp)) 260#define mutex_owned(mp) zmutex_owned((kmutex_t *)(mp)) 261 262extern void zmutex_init(kmutex_t *mp); 263extern void zmutex_destroy(kmutex_t *mp); 264extern int zmutex_owned(kmutex_t *mp); 265extern void mutex_enter(kmutex_t *mp); 266extern void mutex_exit(kmutex_t *mp); 267extern int mutex_tryenter(kmutex_t *mp); 268extern void *mutex_owner(kmutex_t *mp); 269 270/* 271 * RW locks 272 */ 273typedef struct krwlock { 274 int rw_count; 275 void *rw_owner; 276 boolean_t initialized; 277 rwlock_t rw_lock; 278} krwlock_t; 279 280typedef int krw_t; 281 282#define RW_READER 0 283#define RW_WRITER 1 284#define RW_DEFAULT USYNC_THREAD 285 286#undef RW_READ_HELD 287#define RW_READ_HELD(x) ((x)->rw_owner == NULL && (x)->rw_count > 0) 288 289#undef RW_WRITE_HELD 290#define RW_WRITE_HELD(x) ((x)->rw_owner == curthread) 291#define RW_LOCK_HELD(x) rw_lock_held(x) 292 293#undef RW_LOCK_HELD 294#define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x)) 295 296extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg); 297extern void rw_destroy(krwlock_t *rwlp); 298extern void rw_enter(krwlock_t *rwlp, krw_t rw); 299extern int rw_tryenter(krwlock_t *rwlp, krw_t rw); 300extern int rw_tryupgrade(krwlock_t *rwlp); 301extern void rw_exit(krwlock_t *rwlp); 302extern int rw_lock_held(krwlock_t *rwlp); 303#define rw_downgrade(rwlp) do { } while (0) 304 305extern uid_t crgetuid(cred_t *cr); 306extern uid_t crgetruid(cred_t *cr); 307extern gid_t crgetgid(cred_t *cr); 308extern int crgetngroups(cred_t *cr); 309extern gid_t *crgetgroups(cred_t *cr); 310 311/* 312 * Condition variables 313 */ 314typedef cond_t kcondvar_t; 315 316#define CV_DEFAULT USYNC_THREAD 317 318extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg); 319extern void cv_destroy(kcondvar_t *cv); 320extern void cv_wait(kcondvar_t *cv, kmutex_t *mp); 321extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime); 322extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim, 323 hrtime_t res, int flag); 324extern void cv_signal(kcondvar_t *cv); 325extern void cv_broadcast(kcondvar_t *cv); 326 327/* 328 * Thread-specific data 329 */ 330#define tsd_get(k) pthread_getspecific(k) 331#define tsd_set(k, v) pthread_setspecific(k, v) 332#define tsd_create(kp, d) pthread_key_create(kp, d) 333#define tsd_destroy(kp) /* nothing */ 334 335/* 336 * Kernel memory 337 */ 338#define KM_SLEEP UMEM_NOFAIL 339#define KM_PUSHPAGE KM_SLEEP 340#define KM_NOSLEEP UMEM_DEFAULT 341#define KMC_NODEBUG UMC_NODEBUG 342#define KMC_NOTOUCH 0 /* not needed for userland caches */ 343#define KM_NODEBUG 0 344#define kmem_alloc(_s, _f) umem_alloc(_s, _f) 345#define kmem_zalloc(_s, _f) umem_zalloc(_s, _f) 346#define kmem_free(_b, _s) umem_free(_b, _s) 347#define kmem_size() (physmem * PAGESIZE) 348#define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \ 349 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) 350#define kmem_cache_destroy(_c) umem_cache_destroy(_c) 351#define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f) 352#define kmem_cache_free(_c, _b) umem_cache_free(_c, _b) 353#define kmem_debugging() 0 354#define kmem_cache_reap_now(_c) /* nothing */ 355#define kmem_cache_set_move(_c, _cb) /* nothing */ 356#define POINTER_INVALIDATE(_pp) /* nothing */ 357#define POINTER_IS_VALID(_p) 0 358 359typedef umem_cache_t kmem_cache_t; 360 361typedef enum kmem_cbrc { 362 KMEM_CBRC_YES, 363 KMEM_CBRC_NO, 364 KMEM_CBRC_LATER, 365 KMEM_CBRC_DONT_NEED, 366 KMEM_CBRC_DONT_KNOW 367} kmem_cbrc_t; 368 369/* 370 * Task queues 371 */ 372typedef struct taskq taskq_t; 373typedef uintptr_t taskqid_t; 374typedef void (task_func_t)(void *); 375 376typedef struct taskq_ent { 377 struct taskq_ent *tqent_next; 378 struct taskq_ent *tqent_prev; 379 task_func_t *tqent_func; 380 void *tqent_arg; 381 uintptr_t tqent_flags; 382} taskq_ent_t; 383 384#define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */ 385 386#define TASKQ_PREPOPULATE 0x0001 387#define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */ 388#define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */ 389#define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */ 390#define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */ 391 392#define TQ_SLEEP KM_SLEEP /* Can block for memory */ 393#define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */ 394#define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */ 395#define TQ_FRONT 0x08 /* Queue in front */ 396 397 398extern taskq_t *system_taskq; 399 400extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t); 401#define taskq_create_proc(a, b, c, d, e, p, f) \ 402 (taskq_create(a, b, c, d, e, f)) 403#define taskq_create_sysdc(a, b, d, e, p, dc, f) \ 404 (taskq_create(a, b, maxclsyspri, d, e, f)) 405extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t); 406extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t, 407 taskq_ent_t *); 408extern void taskq_destroy(taskq_t *); 409extern void taskq_wait(taskq_t *); 410extern int taskq_member(taskq_t *, void *); 411extern void system_taskq_init(void); 412extern void system_taskq_fini(void); 413 414#define taskq_dispatch_safe(tq, func, arg, flags, task) \ 415 taskq_dispatch((tq), (func), (arg), (flags)) 416 417#define XVA_MAPSIZE 3 418#define XVA_MAGIC 0x78766174 419 420/* 421 * vnodes 422 */ 423typedef struct vnode { 424 uint64_t v_size; 425 int v_fd; 426 char *v_path; 427} vnode_t; 428 429#define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */ 430 431typedef struct xoptattr { 432 timestruc_t xoa_createtime; /* Create time of file */ 433 uint8_t xoa_archive; 434 uint8_t xoa_system; 435 uint8_t xoa_readonly; 436 uint8_t xoa_hidden; 437 uint8_t xoa_nounlink; 438 uint8_t xoa_immutable; 439 uint8_t xoa_appendonly; 440 uint8_t xoa_nodump; 441 uint8_t xoa_settable; 442 uint8_t xoa_opaque; 443 uint8_t xoa_av_quarantined; 444 uint8_t xoa_av_modified; 445 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ]; 446 uint8_t xoa_reparse; 447 uint8_t xoa_offline; 448 uint8_t xoa_sparse; 449} xoptattr_t; 450 451typedef struct vattr { 452 uint_t va_mask; /* bit-mask of attributes */ 453 u_offset_t va_size; /* file size in bytes */ 454} vattr_t; 455 456 457typedef struct xvattr { 458 vattr_t xva_vattr; /* Embedded vattr structure */ 459 uint32_t xva_magic; /* Magic Number */ 460 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */ 461 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */ 462 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */ 463 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */ 464 xoptattr_t xva_xoptattrs; /* Optional attributes */ 465} xvattr_t; 466 467typedef struct vsecattr { 468 uint_t vsa_mask; /* See below */ 469 int vsa_aclcnt; /* ACL entry count */ 470 void *vsa_aclentp; /* pointer to ACL entries */ 471 int vsa_dfaclcnt; /* default ACL entry count */ 472 void *vsa_dfaclentp; /* pointer to default ACL entries */ 473 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */ 474} vsecattr_t; 475 476#define AT_TYPE 0x00001 477#define AT_MODE 0x00002 478#define AT_UID 0x00004 479#define AT_GID 0x00008 480#define AT_FSID 0x00010 481#define AT_NODEID 0x00020 482#define AT_NLINK 0x00040 483#define AT_SIZE 0x00080 484#define AT_ATIME 0x00100 485#define AT_MTIME 0x00200 486#define AT_CTIME 0x00400 487#define AT_RDEV 0x00800 488#define AT_BLKSIZE 0x01000 489#define AT_NBLOCKS 0x02000 490#define AT_SEQ 0x08000 491#define AT_XVATTR 0x10000 492 493#define CRCREAT 0 494 495extern int fop_getattr(vnode_t *vp, vattr_t *vap); 496 497#define VOP_CLOSE(vp, f, c, o, cr, ct) 0 498#define VOP_PUTPAGE(vp, of, sz, fl, cr, ct) 0 499#define VOP_GETATTR(vp, vap, cr) fop_getattr((vp), (vap)); 500 501#define VOP_FSYNC(vp, f, cr, ct) fsync((vp)->v_fd) 502 503#define VN_RELE(vp) vn_close(vp, 0, NULL, NULL) 504#define VN_RELE_ASYNC(vp, taskq) vn_close(vp, 0, NULL, NULL) 505 506#define vn_lock(vp, type) 507#define VOP_UNLOCK(vp, type) 508 509extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp, 510 int x2, int x3); 511extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp, 512 int x2, int x3, vnode_t *vp, int fd); 513extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, 514 offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp); 515extern void vn_close(vnode_t *vp, int openflag, cred_t *cr, kthread_t *td); 516 517#define vn_remove(path, x1, x2) remove(path) 518#define vn_rename(from, to, seg) rename((from), (to)) 519#define vn_is_readonly(vp) B_FALSE 520 521extern vnode_t *rootdir; 522 523#include <sys/file.h> /* for FREAD, FWRITE, etc */ 524#define FTRUNC O_TRUNC 525 526/* 527 * Random stuff 528 */ 529#define ddi_get_lbolt() (gethrtime() >> 23) 530#define ddi_get_lbolt64() (gethrtime() >> 23) 531#define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */ 532 533extern void delay(clock_t ticks); 534 535#define SEC_TO_TICK(sec) ((sec) * hz) 536#define NSEC_TO_TICK(usec) ((usec) / (NANOSEC / hz)) 537 538#define gethrestime_sec() time(NULL) 539#define gethrestime(t) \ 540 do {\ 541 (t)->tv_sec = gethrestime_sec();\ 542 (t)->tv_nsec = 0;\ 543 } while (0); 544 545#define max_ncpus 64 546 547#define minclsyspri 60 548#define maxclsyspri 99 549 550#define CPU_SEQID (thr_self() & (max_ncpus - 1)) 551 552#define kcred NULL 553#define CRED() NULL 554 555#ifndef ptob 556#define ptob(x) ((x) * PAGESIZE) 557#endif 558 559extern uint64_t physmem; 560 561extern int highbit(ulong_t i); 562extern int random_get_bytes(uint8_t *ptr, size_t len); 563extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len); 564 565extern void kernel_init(int); 566extern void kernel_fini(void); 567 568struct spa; 569extern void nicenum(uint64_t num, char *buf); 570extern void show_pool_stats(struct spa *); 571 572typedef struct callb_cpr { 573 kmutex_t *cc_lockp; 574} callb_cpr_t; 575 576#define CALLB_CPR_INIT(cp, lockp, func, name) { \ 577 (cp)->cc_lockp = lockp; \ 578} 579 580#define CALLB_CPR_SAFE_BEGIN(cp) { \ 581 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 582} 583 584#define CALLB_CPR_SAFE_END(cp, lockp) { \ 585 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 586} 587 588#define CALLB_CPR_EXIT(cp) { \ 589 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \ 590 mutex_exit((cp)->cc_lockp); \ 591} 592 593#define zone_dataset_visible(x, y) (1) 594#define INGLOBALZONE(z) (1) 595 596extern char *kmem_asprintf(const char *fmt, ...); 597#define strfree(str) kmem_free((str), strlen(str) + 1) 598 599/* 600 * Hostname information 601 */ 602extern struct utsname utsname; 603extern char hw_serial[]; /* for userland-emulated hostid access */ 604extern int ddi_strtoul(const char *str, char **nptr, int base, 605 unsigned long *result); 606 607extern int ddi_strtoull(const char *str, char **nptr, int base, 608 u_longlong_t *result); 609 610/* ZFS Boot Related stuff. */ 611 612struct _buf { 613 intptr_t _fd; 614}; 615 616struct bootstat { 617 uint64_t st_size; 618}; 619 620typedef struct ace_object { 621 uid_t a_who; 622 uint32_t a_access_mask; 623 uint16_t a_flags; 624 uint16_t a_type; 625 uint8_t a_obj_type[16]; 626 uint8_t a_inherit_obj_type[16]; 627} ace_object_t; 628 629 630#define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05 631#define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06 632#define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07 633#define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08 634 635extern struct _buf *kobj_open_file(char *name); 636extern int kobj_read_file(struct _buf *file, char *buf, unsigned size, 637 unsigned off); 638extern void kobj_close_file(struct _buf *file); 639extern int kobj_get_filesize(struct _buf *file, uint64_t *size); 640extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr); 641extern int zfs_secpolicy_rename_perms(const char *from, const char *to, 642 cred_t *cr); 643extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr); 644extern zoneid_t getzoneid(void); 645/* Random compatibility stuff. */ 646#define lbolt (gethrtime() >> 23) 647#define lbolt64 (gethrtime() >> 23) 648 649extern uint64_t physmem; 650 651#define gethrestime_sec() time(NULL) 652 653#define pwrite64(d, p, n, o) pwrite(d, p, n, o) 654#define readdir64(d) readdir(d) 655#define SIGPENDING(td) (0) 656#define root_mount_wait() do { } while (0) 657#define root_mounted() (1) 658 659struct file { 660 void *dummy; 661}; 662 663#define FCREAT O_CREAT 664#define FOFFMAX 0x0 665 666/* SID stuff */ 667typedef struct ksiddomain { 668 uint_t kd_ref; 669 uint_t kd_len; 670 char *kd_name; 671} ksiddomain_t; 672 673ksiddomain_t *ksid_lookupdomain(const char *); 674void ksiddomain_rele(ksiddomain_t *); 675 676typedef uint32_t idmap_rid_t; 677 678#define DDI_SLEEP KM_SLEEP 679#define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) (0) 680 681#define SX_SYSINIT(name, lock, desc) 682 683#define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, \ 684 intptr_t arg2, struct sysctl_req *req 685 686/* 687 * This describes the access space for a sysctl request. This is needed 688 * so that we can use the interface from the kernel or from user-space. 689 */ 690struct sysctl_req { 691 struct thread *td; /* used for access checking */ 692 int lock; /* wiring state */ 693 void *oldptr; 694 size_t oldlen; 695 size_t oldidx; 696 int (*oldfunc)(struct sysctl_req *, const void *, size_t); 697 void *newptr; 698 size_t newlen; 699 size_t newidx; 700 int (*newfunc)(struct sysctl_req *, void *, size_t); 701 size_t validlen; 702 int flags; 703}; 704 705SLIST_HEAD(sysctl_oid_list, sysctl_oid); 706 707/* 708 * This describes one "oid" in the MIB tree. Potentially more nodes can 709 * be hidden behind it, expanded by the handler. 710 */ 711struct sysctl_oid { 712 struct sysctl_oid_list *oid_parent; 713 SLIST_ENTRY(sysctl_oid) oid_link; 714 int oid_number; 715 u_int oid_kind; 716 void *oid_arg1; 717 intptr_t oid_arg2; 718 const char *oid_name; 719 int (*oid_handler)(SYSCTL_HANDLER_ARGS); 720 const char *oid_fmt; 721 int oid_refcnt; 722 u_int oid_running; 723 const char *oid_descr; 724}; 725 726#define SYSCTL_DECL(...) 727#define SYSCTL_NODE(...) 728#define SYSCTL_INT(...) 729#define SYSCTL_UINT(...) 730#define SYSCTL_ULONG(...) 731#define SYSCTL_PROC(...) 732#define SYSCTL_QUAD(...) 733#define SYSCTL_UQUAD(...) 734#ifdef TUNABLE_INT 735#undef TUNABLE_INT 736#undef TUNABLE_ULONG 737#undef TUNABLE_QUAD 738#endif 739#define TUNABLE_INT(...) 740#define TUNABLE_ULONG(...) 741#define TUNABLE_QUAD(...) 742 743int sysctl_handle_64(SYSCTL_HANDLER_ARGS); 744 745/* Errors */ 746 747#ifndef ERESTART 748#define ERESTART (-1) 749#endif 750 751#ifdef illumos 752/* 753 * Cyclic information 754 */ 755extern kmutex_t cpu_lock; 756 757typedef uintptr_t cyclic_id_t; 758typedef uint16_t cyc_level_t; 759typedef void (*cyc_func_t)(void *); 760 761#define CY_LOW_LEVEL 0 762#define CY_INFINITY INT64_MAX 763#define CYCLIC_NONE ((cyclic_id_t)0) 764 765typedef struct cyc_time { 766 hrtime_t cyt_when; 767 hrtime_t cyt_interval; 768} cyc_time_t; 769 770typedef struct cyc_handler { 771 cyc_func_t cyh_func; 772 void *cyh_arg; 773 cyc_level_t cyh_level; 774} cyc_handler_t; 775 776extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *); 777extern void cyclic_remove(cyclic_id_t); 778extern int cyclic_reprogram(cyclic_id_t, hrtime_t); 779#endif /* illumos */ 780 781#ifdef illumos 782/* 783 * Buf structure 784 */ 785#define B_BUSY 0x0001 786#define B_DONE 0x0002 787#define B_ERROR 0x0004 788#define B_READ 0x0040 /* read when I/O occurs */ 789#define B_WRITE 0x0100 /* non-read pseudo-flag */ 790 791typedef struct buf { 792 int b_flags; 793 size_t b_bcount; 794 union { 795 caddr_t b_addr; 796 } b_un; 797 798 lldaddr_t _b_blkno; 799#define b_lblkno _b_blkno._f 800 size_t b_resid; 801 size_t b_bufsize; 802 int (*b_iodone)(struct buf *); 803 int b_error; 804 void *b_private; 805} buf_t; 806 807extern void bioinit(buf_t *); 808extern void biodone(buf_t *); 809extern void bioerror(buf_t *, int); 810extern int geterror(buf_t *); 811#endif 812 813#ifdef __cplusplus 814} 815#endif 816 817#endif /* _SYS_ZFS_CONTEXT_H */ 818