usr/src/lib/libzpool/common/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  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24  * Copyright (c) 2012, 2016 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 <setjmp.h>
  66 #include <sys/debug.h>
  67 #include <libsysevent.h>
  68 #include <sys/note.h>
  69 #include <sys/types.h>
  70 #include <sys/cred.h>
  71 #include <sys/sysmacros.h>
  72 #include <sys/bitmap.h>
  73 #include <sys/resource.h>
  74 #include <sys/byteorder.h>
  75 #include <sys/list.h>
  76 #include <sys/uio.h>
  77 #include <sys/zfs_debug.h>
  78 #include <sys/sdt.h>
  79 #include <sys/kstat.h>
  80 #include <sys/u8_textprep.h>
  81 #include <sys/sysevent/eventdefs.h>
  82 #include <sys/sysevent/dev.h>
  83 #include <sys/sunddi.h>
  84 #include <sys/debug.h>
  85 #include "zfs.h"
  86
  87 /*
  88  * Debugging
  89  */
  90
  91 /*
  92  * Note that we are not using the debugging levels.
  93  */
  94
  95 #define CE_CONT         0       /* continuation         */
  96 #define CE_NOTE         1       /* notice               */
  97 #define CE_WARN         2       /* warning              */
  98 #define CE_PANIC        3       /* panic                */
  99 #define CE_IGNORE       4       /* print nothing        */
 100
 101 /*
 102  * ZFS debugging
 103  */
 104
 105 #ifdef ZFS_DEBUG
 106 extern void dprintf_setup(int *argc, char **argv);
 107 #endif /* ZFS_DEBUG */
 108
 109 extern void cmn_err(int, const char *, ...);
 110 extern void vcmn_err(int, const char *, __va_list);
 111 extern void panic(const char *, ...)  __NORETURN;
 112 extern void vpanic(const char *, __va_list)  __NORETURN;
 113
 114 #define fm_panic        panic
 115
 116 extern int aok;
 117
 118 /*
 119  * DTrace SDT probes have different signatures in userland than they do in
 120  * the kernel.  If they're being used in kernel code, re-define them out of
 121  * existence for their counterparts in libzpool.
 122  *
 123  * Here's an example of how to use the set-error probes in userland:
 124  * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
 125  *
 126  * Here's an example of how to use DTRACE_PROBE probes in userland:
 127  * If there is a probe declared as follows:
 128  * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
 129  * Then you can use it as follows:
 130  * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
 131  *     {printf("%u %p\n", arg1, arg2);}
 132  */
 133
 134 #ifdef DTRACE_PROBE
 135 #undef  DTRACE_PROBE
 136 #endif  /* DTRACE_PROBE */
 137 #define DTRACE_PROBE(a) \
 138         ZFS_PROBE0(#a)
 139
 140 #ifdef DTRACE_PROBE1
 141 #undef  DTRACE_PROBE1
 142 #endif  /* DTRACE_PROBE1 */
 143 #define DTRACE_PROBE1(a, b, c) \
 144         ZFS_PROBE1(#a, (unsigned long)c)
 145
 146 #ifdef DTRACE_PROBE2
 147 #undef  DTRACE_PROBE2
 148 #endif  /* DTRACE_PROBE2 */
 149 #define DTRACE_PROBE2(a, b, c, d, e) \
 150         ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
 151
 152 #ifdef DTRACE_PROBE3
 153 #undef  DTRACE_PROBE3
 154 #endif  /* DTRACE_PROBE3 */
 155 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
 156         ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
 157
 158 #ifdef DTRACE_PROBE4
 159 #undef  DTRACE_PROBE4
 160 #endif  /* DTRACE_PROBE4 */
 161 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
 162         ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
 163         (unsigned long)i)
 164
 165 /*
 166  * We use the comma operator so that this macro can be used without much
 167  * additional code.  For example, "return (EINVAL);" becomes
 168  * "return (SET_ERROR(EINVAL));".  Note that the argument will be evaluated
 169  * twice, so it should not have side effects (e.g. something like:
 170  * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
 171  */
 172 #define SET_ERROR(err) (ZFS_SET_ERROR(err), err)
 173
 174 /*
 175  * Threads
 176  */
 177 #define curthread       ((void *)(uintptr_t)thr_self())
 178
 179 #define kpreempt(x)     yield()
 180
 181 typedef struct kthread kthread_t;
 182
 183 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 184         zk_thread_create(func, arg, len)
 185 #define thread_exit() thr_exit(NULL)
 186 #define thread_join(t)  panic("libzpool cannot join threads")
 187
 188 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 189
 190 /* in libzpool, p0 exists only to have its address taken */
 191 struct proc {
 192         uintptr_t       this_is_never_used_dont_dereference_it;
 193 };
 194
 195 extern struct proc p0;
 196 #define curproc         (&p0)
 197
 198 #define PS_NONE         -1
 199
 200 extern kthread_t *zk_thread_create(void (*func)(), void *arg, uint64_t len);
 201
 202 #define issig(why)      (FALSE)
 203 #define ISSIG(thr, why) (FALSE)
 204
 205 /*
 206  * Mutexes
 207  */
 208 typedef struct kmutex {
 209         void            *m_owner;
 210         boolean_t       initialized;
 211         mutex_t         m_lock;
 212 } kmutex_t;
 213
 214 #define MUTEX_DEFAULT   USYNC_THREAD
 215 #undef  MUTEX_HELD
 216 #undef  MUTEX_NOT_HELD
 217 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock)
 218 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 219
 220 /*
 221  * Argh -- we have to get cheesy here because the kernel and userland
 222  * have different signatures for the same routine.
 223  */
 224 extern int _mutex_init(mutex_t *mp, int type, void *arg);
 225 extern int _mutex_destroy(mutex_t *mp);
 226
 227 #define mutex_init(mp, b, c, d)         zmutex_init((kmutex_t *)(mp))
 228 #define mutex_destroy(mp)               zmutex_destroy((kmutex_t *)(mp))
 229 #define mutex_enter(mp)                 zmutex_enter(mp)
 230 #define mutex_exit(mp)                  zmutex_exit(mp)
 231
 232 extern void zmutex_init(kmutex_t *mp);
 233 extern void zmutex_destroy(kmutex_t *mp);
 234 extern void zmutex_enter(kmutex_t *mp);
 235 extern void zmutex_exit(kmutex_t *mp);
 236 extern int mutex_tryenter(kmutex_t *mp);
 237 extern void *mutex_owner(kmutex_t *mp);
 238
 239 /*
 240  * RW locks
 241  */
 242 typedef struct krwlock {
 243         void            *rw_owner;
 244         boolean_t       initialized;
 245         rwlock_t        rw_lock;
 246 } krwlock_t;
 247
 248 typedef int krw_t;
 249
 250 #define RW_READER       0
 251 #define RW_WRITER       1
 252 #define RW_DEFAULT      USYNC_THREAD
 253
 254 #undef RW_READ_HELD
 255 #define RW_READ_HELD(x)         _rw_read_held(&(x)->rw_lock)
 256
 257 #undef RW_WRITE_HELD
 258 #define RW_WRITE_HELD(x)        _rw_write_held(&(x)->rw_lock)
 259
 260 #undef RW_LOCK_HELD
 261 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 262
 263 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 264 extern void rw_destroy(krwlock_t *rwlp);
 265 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 266 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 267 extern int rw_tryupgrade(krwlock_t *rwlp);
 268 extern void rw_exit(krwlock_t *rwlp);
 269 #define rw_downgrade(rwlp) do { } while (0)
 270
 271 extern uid_t crgetuid(cred_t *cr);
 272 extern uid_t crgetruid(cred_t *cr);
 273 extern gid_t crgetgid(cred_t *cr);
 274 extern int crgetngroups(cred_t *cr);
 275 extern gid_t *crgetgroups(cred_t *cr);
 276
 277 /*
 278  * Condition variables
 279  */
 280 typedef cond_t kcondvar_t;
 281
 282 #define CV_DEFAULT      USYNC_THREAD
 283 #define CALLOUT_FLAG_ABSOLUTE   0x2
 284
 285 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 286 extern void cv_destroy(kcondvar_t *cv);
 287 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 288 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 289 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
 290     hrtime_t res, int flag);
 291 extern void cv_signal(kcondvar_t *cv);
 292 extern void cv_broadcast(kcondvar_t *cv);
 293
 294 /*
 295  * Thread-specific data
 296  */
 297 #define tsd_get(k) pthread_getspecific(k)
 298 #define tsd_set(k, v) pthread_setspecific(k, v)
 299 #define tsd_create(kp, d) pthread_key_create(kp, d)
 300 #define tsd_destroy(kp) /* nothing */
 301
 302 /*
 303  * kstat creation, installation and deletion
 304  */
 305 extern kstat_t *kstat_create(const char *, int,
 306     const char *, const char *, uchar_t, ulong_t, uchar_t);
 307 extern void kstat_named_init(kstat_named_t *, const char *, uchar_t);
 308 extern void kstat_install(kstat_t *);
 309 extern void kstat_delete(kstat_t *);
 310 extern void kstat_waitq_enter(kstat_io_t *);
 311 extern void kstat_waitq_exit(kstat_io_t *);
 312 extern void kstat_runq_enter(kstat_io_t *);
 313 extern void kstat_runq_exit(kstat_io_t *);
 314 extern void kstat_waitq_to_runq(kstat_io_t *);
 315 extern void kstat_runq_back_to_waitq(kstat_io_t *);
 316
 317 /*
 318  * Kernel memory
 319  */
 320 #define KM_SLEEP                UMEM_NOFAIL
 321 #define KM_PUSHPAGE             KM_SLEEP
 322 #define KM_NOSLEEP              UMEM_DEFAULT
 323 #define KM_NORMALPRI            0       /* not needed with UMEM_DEFAULT */
 324 #define KMC_NODEBUG             UMC_NODEBUG
 325 #define KMC_NOTOUCH             0       /* not needed for userland caches */
 326 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 327 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 328 #define kmem_free(_b, _s)       umem_free(_b, _s)
 329 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 330         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 331 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 332 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 333 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 334 #define kmem_debugging()        0
 335 #define kmem_cache_reap_now(_c)         /* nothing */
 336 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 337 #define vmem_qcache_reap(_v)            /* nothing */
 338 #define POINTER_INVALIDATE(_pp)         /* nothing */
 339 #define POINTER_IS_VALID(_p)    0
 340
 341 extern vmem_t *zio_arena;
 342
 343 typedef umem_cache_t kmem_cache_t;
 344
 345 typedef enum kmem_cbrc {
 346         KMEM_CBRC_YES,
 347         KMEM_CBRC_NO,
 348         KMEM_CBRC_LATER,
 349         KMEM_CBRC_DONT_NEED,
 350         KMEM_CBRC_DONT_KNOW
 351 } kmem_cbrc_t;
 352
 353 /*
 354  * Task queues
 355  */
 356 typedef struct taskq taskq_t;
 357 typedef uintptr_t taskqid_t;
 358 typedef void (task_func_t)(void *);
 359
 360 typedef struct taskq_ent {
 361         struct taskq_ent        *tqent_next;
 362         struct taskq_ent        *tqent_prev;
 363         task_func_t             *tqent_func;
 364         void                    *tqent_arg;
 365         uintptr_t               tqent_flags;
 366 } taskq_ent_t;
 367
 368 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 369
 370 #define TASKQ_PREPOPULATE       0x0001
 371 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 372 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 373 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 374 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 375
 376 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 377 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 378 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 379 #define TQ_FRONT        0x08            /* Queue in front */
 380
 381
 382 extern taskq_t *system_taskq;
 383
 384 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 385 #define taskq_create_proc(a, b, c, d, e, p, f) \
 386             (taskq_create(a, b, c, d, e, f))
 387 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 388             (taskq_create(a, b, maxclsyspri, d, e, f))
 389 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 390 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 391     taskq_ent_t *);
 392 extern void     taskq_destroy(taskq_t *);
 393 extern void     taskq_wait(taskq_t *);
 394 extern int      taskq_member(taskq_t *, void *);
 395 extern void     system_taskq_init(void);
 396 extern void     system_taskq_fini(void);
 397
 398 #define XVA_MAPSIZE     3
 399 #define XVA_MAGIC       0x78766174
 400
 401 /*
 402  * vnodes
 403  */
 404 typedef struct vnode {
 405         uint64_t        v_size;
 406         int             v_fd;
 407         char            *v_path;
 408         int             v_dump_fd;
 409 } vnode_t;
 410
 411 extern char *vn_dumpdir;
 412 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 413
 414 typedef struct xoptattr {
 415         timestruc_t     xoa_createtime; /* Create time of file */
 416         uint8_t         xoa_archive;
 417         uint8_t         xoa_system;
 418         uint8_t         xoa_readonly;
 419         uint8_t         xoa_hidden;
 420         uint8_t         xoa_nounlink;
 421         uint8_t         xoa_immutable;
 422         uint8_t         xoa_appendonly;
 423         uint8_t         xoa_nodump;
 424         uint8_t         xoa_settable;
 425         uint8_t         xoa_opaque;
 426         uint8_t         xoa_av_quarantined;
 427         uint8_t         xoa_av_modified;
 428         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 429         uint8_t         xoa_reparse;
 430         uint8_t         xoa_offline;
 431         uint8_t         xoa_sparse;
 432 } xoptattr_t;
 433
 434 typedef struct vattr {
 435         uint_t          va_mask;        /* bit-mask of attributes */
 436         uoff_t          va_size;        /* file size in bytes */
 437 } vattr_t;
 438
 439
 440 typedef struct xvattr {
 441         vattr_t         xva_vattr;      /* Embedded vattr structure */
 442         uint32_t        xva_magic;      /* Magic Number */
 443         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 444         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 445         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 446         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 447         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 448 } xvattr_t;
 449
 450 typedef struct vsecattr {
 451         uint_t          vsa_mask;       /* See below */
 452         int             vsa_aclcnt;     /* ACL entry count */
 453         void            *vsa_aclentp;   /* pointer to ACL entries */
 454         int             vsa_dfaclcnt;   /* default ACL entry count */
 455         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 456         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 457 } vsecattr_t;
 458
 459 #define AT_TYPE         0x00001
 460 #define AT_MODE         0x00002
 461 #define AT_UID          0x00004
 462 #define AT_GID          0x00008
 463 #define AT_FSID         0x00010
 464 #define AT_NODEID       0x00020
 465 #define AT_NLINK        0x00040
 466 #define AT_SIZE         0x00080
 467 #define AT_ATIME        0x00100
 468 #define AT_MTIME        0x00200
 469 #define AT_CTIME        0x00400
 470 #define AT_RDEV         0x00800
 471 #define AT_BLKSIZE      0x01000
 472 #define AT_NBLOCKS      0x02000
 473 #define AT_SEQ          0x08000
 474 #define AT_XVATTR       0x10000
 475
 476 #define CRCREAT         0
 477
 478 extern int fop_getattr_real(vnode_t *vp, vattr_t *vap);
 479
 480 #define fop_close(vp, f, c, o, cr, ct)  0
 481 #define fop_putpage(vp, of, sz, fl, cr, ct)     0
 482 #define fop_getattr(vp, vap, fl, cr, ct)  fop_getattr_real((vp), (vap))
 483
 484 #define fop_fsync(vp, f, cr, ct)        fsync((vp)->v_fd)
 485
 486 #define VN_RELE(vp)     vn_close(vp)
 487
 488 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 489     int x2, int x3);
 490 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 491     int x2, int x3, vnode_t *vp, int fd);
 492 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 493     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 494 extern void vn_close(vnode_t *vp);
 495
 496 #define vn_remove(path, x1, x2)         remove(path)
 497 #define vn_rename(from, to, seg)        rename((from), (to))
 498 #define vn_is_readonly(vp)              B_FALSE
 499
 500 extern vnode_t *rootdir;
 501
 502 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 503
 504 /*
 505  * Random stuff
 506  */
 507 #define ddi_get_lbolt()         (gethrtime() >> 23)
 508 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 509 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 510
 511 extern void delay(clock_t ticks);
 512
 513 #define SEC_TO_TICK(sec)        ((sec) * hz)
 514 #define NSEC_TO_TICK(usec)      ((usec) / (NANOSEC / hz))
 515
 516 #define gethrestime_sec() time(NULL)
 517 #define gethrestime(t) \
 518         do {\
 519                 (t)->tv_sec = gethrestime_sec();\
 520                 (t)->tv_nsec = 0;\
 521         } while (0);
 522
 523 #define max_ncpus       64
 524 #define boot_ncpus      (sysconf(_SC_NPROCESSORS_ONLN))
 525
 526 #define minclsyspri     60
 527 #define maxclsyspri     99
 528
 529 #define CPU_SEQID       (thr_self() & (max_ncpus - 1))
 530
 531 #define kcred           NULL
 532 #define CRED()          NULL
 533
 534 #define ptob(x)         ((x) * PAGESIZE)
 535
 536 extern uint64_t physmem;
 537
 538 extern int highbit64(uint64_t i);
 539 extern int random_get_bytes(uint8_t *ptr, size_t len);
 540 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 541
 542 extern void kernel_init(int);
 543 extern void kernel_fini(void);
 544
 545 struct spa;
 546 extern void nicenum(uint64_t num, char *buf);
 547 extern void show_pool_stats(struct spa *);
 548 extern int set_global_var(char *arg);
 549
 550 typedef struct callb_cpr {
 551         kmutex_t        *cc_lockp;
 552 } callb_cpr_t;
 553
 554 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 555         (cp)->cc_lockp = lockp;                                 \
 556 }
 557
 558 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 559         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 560 }
 561
 562 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 563         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 564 }
 565
 566 #define CALLB_CPR_EXIT(cp) {                                    \
 567         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 568         mutex_exit((cp)->cc_lockp);                             \
 569 }
 570
 571 #define zone_dataset_visible(x, y)      (1)
 572 #define INGLOBALZONE(z)                 (1)
 573
 574 extern char *kmem_asprintf(const char *fmt, ...);
 575 #define strfree(str) kmem_free((str), strlen(str) + 1)
 576
 577 /*
 578  * Hostname information
 579  */
 580 extern char hw_serial[];        /* for userland-emulated hostid access */
 581 extern int ddi_strtoul(const char *str, char **nptr, int base,
 582     unsigned long *result);
 583
 584 extern int ddi_strtoull(const char *str, char **nptr, int base,
 585     u_longlong_t *result);
 586
 587 /* ZFS Boot Related stuff. */
 588
 589 struct _buf {
 590         intptr_t        _fd;
 591 };
 592
 593 struct bootstat {
 594         uint64_t st_size;
 595 };
 596
 597 typedef struct ace_object {
 598         uid_t           a_who;
 599         uint32_t        a_access_mask;
 600         uint16_t        a_flags;
 601         uint16_t        a_type;
 602         uint8_t         a_obj_type[16];
 603         uint8_t         a_inherit_obj_type[16];
 604 } ace_object_t;
 605
 606
 607 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 608 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 609 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 610 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 611
 612 extern struct _buf *kobj_open_file(char *name);
 613 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 614     unsigned off);
 615 extern void kobj_close_file(struct _buf *file);
 616 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 617 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 618 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 619     cred_t *cr);
 620 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 621 extern zoneid_t getzoneid(void);
 622
 623 /* SID stuff */
 624 typedef struct ksiddomain {
 625         uint_t  kd_ref;
 626         uint_t  kd_len;
 627         char    *kd_name;
 628 } ksiddomain_t;
 629
 630 ksiddomain_t *ksid_lookupdomain(const char *);
 631 void ksiddomain_rele(ksiddomain_t *);
 632
 633 #define DDI_SLEEP       KM_SLEEP
 634 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 635         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 636
 637 /*
 638  * Cyclic information
 639  */
 640 extern kmutex_t cpu_lock;
 641
 642 typedef uintptr_t cyclic_id_t;
 643 typedef uint16_t cyc_level_t;
 644 typedef void (*cyc_func_t)(void *);
 645
 646 #define CY_LOW_LEVEL    0
 647 #define CY_INFINITY     INT64_MAX
 648 #define CYCLIC_NONE     ((cyclic_id_t)0)
 649
 650 typedef struct cyc_time {
 651         hrtime_t cyt_when;
 652         hrtime_t cyt_interval;
 653 } cyc_time_t;
 654
 655 typedef struct cyc_handler {
 656         cyc_func_t cyh_func;
 657         void *cyh_arg;
 658         cyc_level_t cyh_level;
 659 } cyc_handler_t;
 660
 661 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
 662 extern void cyclic_remove(cyclic_id_t);
 663 extern int cyclic_reprogram(cyclic_id_t, hrtime_t);
 664
 665 /*
 666  * Buf structure
 667  */
 668 #define B_BUSY          0x0001
 669 #define B_DONE          0x0002
 670 #define B_ERROR         0x0004
 671 #define B_READ          0x0040  /* read when I/O occurs */
 672 #define B_WRITE         0x0100  /* non-read pseudo-flag */
 673
 674 typedef struct buf {
 675         int     b_flags;
 676         size_t b_bcount;
 677         union {
 678                 caddr_t b_addr;
 679         } b_un;
 680
 681         lldaddr_t       _b_blkno;
 682 #define b_lblkno        _b_blkno._f
 683         size_t  b_resid;
 684         size_t  b_bufsize;
 685         int     (*b_iodone)(struct buf *);
 686         int     b_error;
 687         void    *b_private;
 688 } buf_t;
 689
 690 extern void bioinit(buf_t *);
 691 extern void biodone(buf_t *);
 692 extern void bioerror(buf_t *, int);
 693 extern int geterror(buf_t *);
 694
 695 #ifdef  __cplusplus
 696 }
 697 #endif
 698
 699 #endif  /* _SYS_ZFS_CONTEXT_H */