lib/libzpool/include/sys/zfs_context.h

   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  */
  24
  25 #ifndef _SYS_ZFS_CONTEXT_H
  26 #define _SYS_ZFS_CONTEXT_H
  27
  28 #ifdef  __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 #define _SYS_MUTEX_H
  33 #define _SYS_RWLOCK_H
  34 #define _SYS_CONDVAR_H
  35 #define _SYS_SYSTM_H
  36 #define _SYS_DEBUG_H
  37 #define _SYS_T_LOCK_H
  38 #define _SYS_VNODE_H
  39 #define _SYS_VFS_H
  40 #define _SYS_SUNDDI_H
  41 #define _SYS_CALLB_H
  42
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <stddef.h>
  46 #include <stdarg.h>
  47 #include <fcntl.h>
  48 #include <unistd.h>
  49 #include <errno.h>
  50 #include <string.h>
  51 #include <strings.h>
  52 #include <pthread.h>
  53 #include <assert.h>
  54 #include <alloca.h>
  55 #include <umem.h>
  56 #include <limits.h>
  57 #include <atomic.h>
  58 #include <dirent.h>
  59 #include <time.h>
  60 #include <sys/note.h>
  61 #include <sys/types.h>
  62 #include <sys/cred.h>
  63 #include <sys/sysmacros.h>
  64 #include <sys/bitmap.h>
  65 #include <sys/resource.h>
  66 #include <sys/byteorder.h>
  67 #include <sys/list.h>
  68 #include <sys/uio.h>
  69 #include <sys/zfs_debug.h>
  70 #include <sys/sdt.h>
  71 #include <sys/kstat.h>
  72 #include <sys/u8_textprep.h>
  73 #include <sys/fm/fs/zfs.h>
  74 #include <sys/sunddi.h>
  75
  76 /*
  77  * Stack
  78  */
  79
  80 #define  noinline       __attribute__((noinline))
  81
  82 /*
  83  * Debugging
  84  */
  85
  86 /*
  87  * Note that we are not using the debugging levels.
  88  */
  89
  90 #define CE_CONT         0       /* continuation         */
  91 #define CE_NOTE         1       /* notice               */
  92 #define CE_WARN         2       /* warning              */
  93 #define CE_PANIC        3       /* panic                */
  94 #define CE_IGNORE       4       /* print nothing        */
  95
  96 extern int aok;
  97
  98 /*
  99  * ZFS debugging
 100  */
 101
 102 #ifdef ZFS_DEBUG
 103 extern void dprintf_setup(int *argc, char **argv);
 104 #endif /* ZFS_DEBUG */
 105
 106 extern void cmn_err(int, const char *, ...);
 107 extern void vcmn_err(int, const char *, __va_list);
 108 extern void panic(const char *, ...);
 109 extern void vpanic(const char *, __va_list);
 110
 111 #define fm_panic        panic
 112
 113 /*
 114  * DTrace SDT probes have different signatures in userland than they do in
 115  * kernel.  If they're being used in kernel code, re-define them out of
 116  * existence for their counterparts in libzpool.
 117  */
 118
 119 #ifdef DTRACE_PROBE
 120 #undef  DTRACE_PROBE
 121 #define DTRACE_PROBE(a) ((void)0)
 122 #endif  /* DTRACE_PROBE */
 123
 124 #ifdef DTRACE_PROBE1
 125 #undef  DTRACE_PROBE1
 126 #define DTRACE_PROBE1(a, b, c)  ((void)0)
 127 #endif  /* DTRACE_PROBE1 */
 128
 129 #ifdef DTRACE_PROBE2
 130 #undef  DTRACE_PROBE2
 131 #define DTRACE_PROBE2(a, b, c, d, e)    ((void)0)
 132 #endif  /* DTRACE_PROBE2 */
 133
 134 #ifdef DTRACE_PROBE3
 135 #undef  DTRACE_PROBE3
 136 #define DTRACE_PROBE3(a, b, c, d, e, f, g)      ((void)0)
 137 #endif  /* DTRACE_PROBE3 */
 138
 139 #ifdef DTRACE_PROBE4
 140 #undef  DTRACE_PROBE4
 141 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 142 #endif  /* DTRACE_PROBE4 */
 143
 144 /*
 145  * Threads
 146  */
 147 #define TS_MAGIC                0x72f158ab4261e538ull
 148 #define TS_RUN                  0x00000002
 149 #ifdef __linux__
 150 #define STACK_SIZE              8192    /* Linux x86 and amd64 */
 151 #else
 152 #define STACK_SIZE              24576   /* Solaris */
 153 #endif
 154
 155 #ifdef NPTL_GUARD_WITHIN_STACK
 156 #define EXTRA_GUARD_BYTES       PAGESIZE
 157 #else
 158 #define EXTRA_GUARD_BYTES       0
 159 #endif
 160
 161 /* in libzpool, p0 exists only to have its address taken */
 162 typedef struct proc {
 163         uintptr_t       this_is_never_used_dont_dereference_it;
 164 } proc_t;
 165
 166 extern struct proc p0;
 167
 168 typedef void (*thread_func_t)(void *);
 169 typedef void (*thread_func_arg_t)(void *);
 170 typedef pthread_t kt_did_t;
 171
 172 typedef struct kthread {
 173         kt_did_t        t_tid;
 174         thread_func_t   t_func;
 175         void *          t_arg;
 176 } kthread_t;
 177
 178 #define tsd_get(key)                    pthread_getspecific(key)
 179 #define tsd_set(key, val)               pthread_setspecific(key, val)
 180 #define curthread                       zk_thread_current()
 181 #define thread_exit                     zk_thread_exit
 182 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 183         zk_thread_create(stk, stksize, (thread_func_t)func, arg,        \
 184                          len, NULL, state, pri)
 185 #define thread_join(t)                  zk_thread_join(t)
 186 #define newproc(f,a,cid,pri,ctp,pid)    (ENOSYS)
 187
 188 extern kthread_t *zk_thread_current(void);
 189 extern void zk_thread_exit(void);
 190 extern kthread_t *zk_thread_create(caddr_t stk, size_t  stksize,
 191         thread_func_t func, void *arg, size_t len,
 192         proc_t *pp, int state, pri_t pri);
 193 extern void zk_thread_join(kt_did_t tid);
 194
 195 #define PS_NONE         -1
 196
 197 #define issig(why)      (FALSE)
 198 #define ISSIG(thr, why) (FALSE)
 199
 200 /*
 201  * Mutexes
 202  */
 203 #define MTX_MAGIC       0x9522f51362a6e326ull
 204 #define MTX_INIT        ((void *)NULL)
 205 #define MTX_DEST        ((void *)-1UL)
 206
 207 typedef struct kmutex {
 208         void            *m_owner;
 209         uint64_t        m_magic;
 210         pthread_mutex_t m_lock;
 211 } kmutex_t;
 212
 213 #define MUTEX_DEFAULT   0
 214 #define MUTEX_HELD(m)   ((m)->m_owner == curthread)
 215 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 216
 217 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 218 extern void mutex_destroy(kmutex_t *mp);
 219 extern void mutex_enter(kmutex_t *mp);
 220 extern void mutex_exit(kmutex_t *mp);
 221 extern int mutex_tryenter(kmutex_t *mp);
 222 extern void *mutex_owner(kmutex_t *mp);
 223 extern int mutex_held(kmutex_t *mp);
 224
 225 /*
 226  * RW locks
 227  */
 228 #define RW_MAGIC        0x4d31fb123648e78aull
 229 #define RW_INIT         ((void *)NULL)
 230 #define RW_DEST         ((void *)-1UL)
 231
 232 typedef struct krwlock {
 233         void                    *rw_owner;
 234         void                    *rw_wr_owner;
 235         uint64_t                rw_magic;
 236         pthread_rwlock_t        rw_lock;
 237         uint_t                  rw_readers;
 238 } krwlock_t;
 239
 240 typedef int krw_t;
 241
 242 #define RW_READER       0
 243 #define RW_WRITER       1
 244 #define RW_DEFAULT      RW_READER
 245
 246 #define RW_READ_HELD(x)         ((x)->rw_readers > 0)
 247 #define RW_WRITE_HELD(x)        ((x)->rw_wr_owner == curthread)
 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 gid_t crgetgid(cred_t *cr);
 260 extern int crgetngroups(cred_t *cr);
 261 extern gid_t *crgetgroups(cred_t *cr);
 262
 263 /*
 264  * Condition variables
 265  */
 266 #define CV_MAGIC        0xd31ea9a83b1b30c4ull
 267
 268 typedef struct kcondvar {
 269         uint64_t                cv_magic;
 270         pthread_cond_t          cv;
 271 } kcondvar_t;
 272
 273 #define CV_DEFAULT      0
 274
 275 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 276 extern void cv_destroy(kcondvar_t *cv);
 277 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 278 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 279 extern void cv_signal(kcondvar_t *cv);
 280 extern void cv_broadcast(kcondvar_t *cv);
 281
 282 /*
 283  * kstat creation, installation and deletion
 284  */
 285 extern kstat_t *kstat_create(char *, int,
 286     char *, char *, uchar_t, ulong_t, uchar_t);
 287 extern void kstat_install(kstat_t *);
 288 extern void kstat_delete(kstat_t *);
 289
 290 /*
 291  * Kernel memory
 292  */
 293 #define KM_SLEEP                UMEM_NOFAIL
 294 #define KM_PUSHPAGE             KM_SLEEP
 295 #define KM_NOSLEEP              UMEM_DEFAULT
 296 #define KM_NODEBUG              0x0
 297 #define KMC_NODEBUG             UMC_NODEBUG
 298 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 299 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 300 #define kmem_free(_b, _s)       umem_free(_b, _s)
 301 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 302 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 303 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 304 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 305         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 306 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 307 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 308 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 309 #define kmem_debugging()        0
 310 #define kmem_cache_reap_now(_c)         /* nothing */
 311 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 312 #define POINTER_INVALIDATE(_pp)         /* nothing */
 313 #define POINTER_IS_VALID(_p)    0
 314
 315 typedef umem_cache_t kmem_cache_t;
 316
 317 typedef enum kmem_cbrc {
 318         KMEM_CBRC_YES,
 319         KMEM_CBRC_NO,
 320         KMEM_CBRC_LATER,
 321         KMEM_CBRC_DONT_NEED,
 322         KMEM_CBRC_DONT_KNOW
 323 } kmem_cbrc_t;
 324
 325 /*
 326  * Task queues
 327  */
 328 typedef struct taskq taskq_t;
 329 typedef uintptr_t taskqid_t;
 330 typedef void (task_func_t)(void *);
 331
 332 #define TASKQ_PREPOPULATE       0x0001
 333 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 334 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 335 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 336 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 337
 338 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 339 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 340 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 341 #define TQ_FRONT        0x08            /* Queue in front */
 342
 343 extern taskq_t *system_taskq;
 344
 345 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 346 #define taskq_create_proc(a, b, c, d, e, p, f) \
 347             (taskq_create(a, b, c, d, e, f))
 348 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 349             (taskq_create(a, b, maxclsyspri, d, e, f))
 350 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 351 extern void     taskq_destroy(taskq_t *);
 352 extern void     taskq_wait(taskq_t *);
 353 extern int      taskq_member(taskq_t *, kthread_t *);
 354 extern void     system_taskq_init(void);
 355 extern void     system_taskq_fini(void);
 356
 357 #define XVA_MAPSIZE     3
 358 #define XVA_MAGIC       0x78766174
 359
 360 /*
 361  * vnodes
 362  */
 363 typedef struct vnode {
 364         uint64_t        v_size;
 365         int             v_fd;
 366         char            *v_path;
 367 } vnode_t;
 368
 369 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 370
 371 typedef struct xoptattr {
 372         timestruc_t     xoa_createtime; /* Create time of file */
 373         uint8_t         xoa_archive;
 374         uint8_t         xoa_system;
 375         uint8_t         xoa_readonly;
 376         uint8_t         xoa_hidden;
 377         uint8_t         xoa_nounlink;
 378         uint8_t         xoa_immutable;
 379         uint8_t         xoa_appendonly;
 380         uint8_t         xoa_nodump;
 381         uint8_t         xoa_settable;
 382         uint8_t         xoa_opaque;
 383         uint8_t         xoa_av_quarantined;
 384         uint8_t         xoa_av_modified;
 385         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 386         uint8_t         xoa_reparse;
 387         uint8_t         xoa_offline;
 388         uint8_t         xoa_sparse;
 389 } xoptattr_t;
 390
 391 typedef struct vattr {
 392         uint_t          va_mask;        /* bit-mask of attributes */
 393         u_offset_t      va_size;        /* file size in bytes */
 394 } vattr_t;
 395
 396
 397 typedef struct xvattr {
 398         vattr_t         xva_vattr;      /* Embedded vattr structure */
 399         uint32_t        xva_magic;      /* Magic Number */
 400         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 401         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 402         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 403         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 404         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 405 } xvattr_t;
 406
 407 typedef struct vsecattr {
 408         uint_t          vsa_mask;       /* See below */
 409         int             vsa_aclcnt;     /* ACL entry count */
 410         void            *vsa_aclentp;   /* pointer to ACL entries */
 411         int             vsa_dfaclcnt;   /* default ACL entry count */
 412         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 413         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 414 } vsecattr_t;
 415
 416 #define AT_TYPE         0x00001
 417 #define AT_MODE         0x00002
 418 #define AT_UID          0x00004
 419 #define AT_GID          0x00008
 420 #define AT_FSID         0x00010
 421 #define AT_NODEID       0x00020
 422 #define AT_NLINK        0x00040
 423 #define AT_SIZE         0x00080
 424 #define AT_ATIME        0x00100
 425 #define AT_MTIME        0x00200
 426 #define AT_CTIME        0x00400
 427 #define AT_RDEV         0x00800
 428 #define AT_BLKSIZE      0x01000
 429 #define AT_NBLOCKS      0x02000
 430 #define AT_SEQ          0x08000
 431 #define AT_XVATTR       0x10000
 432
 433 #define CRCREAT         0
 434
 435 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 436
 437 #define VOP_CLOSE(vp, f, c, o, cr, ct)  0
 438 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 439 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 440
 441 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 442
 443 #define VN_RELE(vp)     vn_close(vp)
 444
 445 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 446     int x2, int x3);
 447 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 448     int x2, int x3, vnode_t *vp, int fd);
 449 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 450     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 451 extern void vn_close(vnode_t *vp);
 452
 453 #define vn_remove(path, x1, x2)         remove(path)
 454 #define vn_rename(from, to, seg)        rename((from), (to))
 455 #define vn_is_readonly(vp)              B_FALSE
 456
 457 extern vnode_t *rootdir;
 458
 459 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 460
 461 /*
 462  * Random stuff
 463  */
 464 #define ddi_get_lbolt()         (gethrtime() >> 23)
 465 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 466 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 467
 468 extern void delay(clock_t ticks);
 469
 470 #define gethrestime_sec() time(NULL)
 471 #define gethrestime(t) \
 472         do {\
 473                 (t)->tv_sec = gethrestime_sec();\
 474                 (t)->tv_nsec = 0;\
 475         } while (0);
 476
 477 #define max_ncpus       64
 478
 479 #define minclsyspri     60
 480 #define maxclsyspri     99
 481
 482 #define CPU_SEQID       (pthread_self() & (max_ncpus - 1))
 483
 484 #define kcred           NULL
 485 #define CRED()          NULL
 486
 487 #define ptob(x)         ((x) * PAGESIZE)
 488
 489 extern uint64_t physmem;
 490
 491 extern int highbit(ulong_t i);
 492 extern int random_get_bytes(uint8_t *ptr, size_t len);
 493 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 494
 495 extern void kernel_init(int);
 496 extern void kernel_fini(void);
 497
 498 struct spa;
 499 extern void nicenum(uint64_t num, char *buf);
 500 extern void show_pool_stats(struct spa *);
 501
 502 typedef struct callb_cpr {
 503         kmutex_t        *cc_lockp;
 504 } callb_cpr_t;
 505
 506 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 507         (cp)->cc_lockp = lockp;                                 \
 508 }
 509
 510 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 511         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 512 }
 513
 514 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 515         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 516 }
 517
 518 #define CALLB_CPR_EXIT(cp) {                                    \
 519         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 520         mutex_exit((cp)->cc_lockp);                             \
 521 }
 522
 523 #define zone_dataset_visible(x, y)      (1)
 524 #define INGLOBALZONE(z)                 (1)
 525
 526 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 527 extern char *kmem_asprintf(const char *fmt, ...);
 528 #define strfree(str) kmem_free((str), strlen(str)+1)
 529
 530 /*
 531  * Hostname information
 532  */
 533 extern char hw_serial[];        /* for userland-emulated hostid access */
 534 extern int ddi_strtoul(const char *str, char **nptr, int base,
 535     unsigned long *result);
 536
 537 extern int ddi_strtoull(const char *str, char **nptr, int base,
 538     u_longlong_t *result);
 539
 540 /* ZFS Boot Related stuff. */
 541
 542 struct _buf {
 543         intptr_t        _fd;
 544 };
 545
 546 struct bootstat {
 547         uint64_t st_size;
 548 };
 549
 550 typedef struct ace_object {
 551         uid_t           a_who;
 552         uint32_t        a_access_mask;
 553         uint16_t        a_flags;
 554         uint16_t        a_type;
 555         uint8_t         a_obj_type[16];
 556         uint8_t         a_inherit_obj_type[16];
 557 } ace_object_t;
 558
 559
 560 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 561 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 562 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 563 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 564
 565 extern struct _buf *kobj_open_file(char *name);
 566 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 567     unsigned off);
 568 extern void kobj_close_file(struct _buf *file);
 569 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 570 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 571 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 572     cred_t *cr);
 573 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 574 extern zoneid_t getzoneid(void);
 575
 576 /* SID stuff */
 577 typedef struct ksiddomain {
 578         uint_t  kd_ref;
 579         uint_t  kd_len;
 580         char    *kd_name;
 581 } ksiddomain_t;
 582
 583 ksiddomain_t *ksid_lookupdomain(const char *);
 584 void ksiddomain_rele(ksiddomain_t *);
 585
 586 #define DDI_SLEEP       KM_SLEEP
 587 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 588         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 589
 590 #ifdef  __cplusplus
 591 }
 592 #endif
 593
 594 #endif  /* _SYS_ZFS_CONTEXT_H */