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 extern int aok;
 114
 115 /* This definition is copied from assert.h. */
 116 #if defined(__STDC__)
 117 #if __STDC_VERSION__ - 0 >= 199901L
 118 #define zverify(EX) (void)((EX) || (aok) || \
 119         (__assert_c99(#EX, __FILE__, __LINE__, __func__), 0))
 120 #else
 121 #define zverify(EX) (void)((EX) || (aok) || \
 122         (__assert(#EX, __FILE__, __LINE__), 0))
 123 #endif /* __STDC_VERSION__ - 0 >= 199901L */
 124 #else
 125 #define zverify(EX) (void)((EX) || (aok) || \
 126         (_assert("EX", __FILE__, __LINE__), 0))
 127 #endif  /* __STDC__ */
 128
 129
 130 #define VERIFY  zverify
 131 #define ASSERT  zverify
 132 #undef  assert
 133 #define assert  zverify
 134
 135 extern void __assert(const char *, const char *, int);
 136
 137 #ifdef lint
 138 #define VERIFY3_IMPL(x, y, z, t)        if (x == z) ((void)0)
 139 #else
 140 /* BEGIN CSTYLED */
 141 #define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
 142         const TYPE __left = (TYPE)(LEFT); \
 143         const TYPE __right = (TYPE)(RIGHT); \
 144         if (!(__left OP __right) && (!aok)) { \
 145                 char *__buf = alloca(256); \
 146                 (void) snprintf(__buf, 256, "%s %s %s (0x%llx %s 0x%llx)", \
 147                         #LEFT, #OP, #RIGHT, \
 148                         (u_longlong_t)__left, #OP, (u_longlong_t)__right); \
 149                 __assert(__buf, __FILE__, __LINE__); \
 150         } \
 151 _NOTE(CONSTCOND) } while (0)
 152 /* END CSTYLED */
 153 #endif /* lint */
 154
 155 #define VERIFY3S(x, y, z)       VERIFY3_IMPL(x, y, z, int64_t)
 156 #define VERIFY3U(x, y, z)       VERIFY3_IMPL(x, y, z, uint64_t)
 157 #define VERIFY3P(x, y, z)       VERIFY3_IMPL(x, y, z, uintptr_t)
 158
 159 #ifdef NDEBUG
 160 #define ASSERT3S(x, y, z)       ((void)0)
 161 #define ASSERT3U(x, y, z)       ((void)0)
 162 #define ASSERT3P(x, y, z)       ((void)0)
 163 #else
 164 #define ASSERT3S(x, y, z)       VERIFY3S(x, y, z)
 165 #define ASSERT3U(x, y, z)       VERIFY3U(x, y, z)
 166 #define ASSERT3P(x, y, z)       VERIFY3P(x, y, z)
 167 #endif
 168
 169 /*
 170  * DTrace SDT probes have different signatures in userland than they do in
 171  * kernel.  If they're being used in kernel code, re-define them out of
 172  * existence for their counterparts in libzpool.
 173  */
 174
 175 #ifdef DTRACE_PROBE
 176 #undef  DTRACE_PROBE
 177 #define DTRACE_PROBE(a) ((void)0)
 178 #endif  /* DTRACE_PROBE */
 179
 180 #ifdef DTRACE_PROBE1
 181 #undef  DTRACE_PROBE1
 182 #define DTRACE_PROBE1(a, b, c)  ((void)0)
 183 #endif  /* DTRACE_PROBE1 */
 184
 185 #ifdef DTRACE_PROBE2
 186 #undef  DTRACE_PROBE2
 187 #define DTRACE_PROBE2(a, b, c, d, e)    ((void)0)
 188 #endif  /* DTRACE_PROBE2 */
 189
 190 #ifdef DTRACE_PROBE3
 191 #undef  DTRACE_PROBE3
 192 #define DTRACE_PROBE3(a, b, c, d, e, f, g)      ((void)0)
 193 #endif  /* DTRACE_PROBE3 */
 194
 195 #ifdef DTRACE_PROBE4
 196 #undef  DTRACE_PROBE4
 197 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 198 #endif  /* DTRACE_PROBE4 */
 199
 200 /*
 201  * Threads
 202  */
 203 #define TS_MAGIC                0x72f158ab4261e538ull
 204 #define TS_RUN                  0x00000002
 205 #ifdef __linux__
 206 #define STACK_SIZE              8192    /* Linux x86 and amd64 */
 207 #else
 208 #define STACK_SIZE              24576   /* Solaris */
 209 #endif
 210
 211 #ifdef NPTL_GUARD_WITHIN_STACK
 212 #define EXTRA_GUARD_BYTES       PAGESIZE
 213 #else
 214 #define EXTRA_GUARD_BYTES       0
 215 #endif
 216
 217 /* in libzpool, p0 exists only to have its address taken */
 218 typedef struct proc {
 219         uintptr_t       this_is_never_used_dont_dereference_it;
 220 } proc_t;
 221
 222 extern struct proc p0;
 223
 224 typedef void (*thread_func_t)(void *);
 225 typedef void (*thread_func_arg_t)(void *);
 226 typedef pthread_t kt_did_t;
 227
 228 typedef struct kthread {
 229         kt_did_t        t_tid;
 230         thread_func_t   t_func;
 231         void *          t_arg;
 232 } kthread_t;
 233
 234 #define tsd_get(key)                    pthread_getspecific(key)
 235 #define tsd_set(key, val)               pthread_setspecific(key, val)
 236 #define curthread                       zk_thread_current()
 237 #define thread_exit                     zk_thread_exit
 238 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 239         zk_thread_create(stk, stksize, (thread_func_t)func, arg,        \
 240                          len, NULL, state, pri)
 241 #define thread_join(t)                  zk_thread_join(t)
 242 #define newproc(f,a,cid,pri,ctp,pid)    (ENOSYS)
 243
 244 extern kthread_t *zk_thread_current(void);
 245 extern void zk_thread_exit(void);
 246 extern kthread_t *zk_thread_create(caddr_t stk, size_t  stksize,
 247         thread_func_t func, void *arg, size_t len,
 248         proc_t *pp, int state, pri_t pri);
 249 extern void zk_thread_join(kt_did_t tid);
 250
 251 #define PS_NONE         -1
 252
 253 #define issig(why)      (FALSE)
 254 #define ISSIG(thr, why) (FALSE)
 255
 256 /*
 257  * Mutexes
 258  */
 259 #define MTX_MAGIC       0x9522f51362a6e326ull
 260 #define MTX_INIT        ((void *)NULL)
 261 #define MTX_DEST        ((void *)-1UL)
 262
 263 typedef struct kmutex {
 264         void            *m_owner;
 265         uint64_t        m_magic;
 266         pthread_mutex_t m_lock;
 267 } kmutex_t;
 268
 269 #define MUTEX_DEFAULT   0
 270 #define MUTEX_HELD(m)   ((m)->m_owner == curthread)
 271 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 272
 273 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 274 extern void mutex_destroy(kmutex_t *mp);
 275 extern void mutex_enter(kmutex_t *mp);
 276 extern void mutex_exit(kmutex_t *mp);
 277 extern int mutex_tryenter(kmutex_t *mp);
 278 extern void *mutex_owner(kmutex_t *mp);
 279 extern int mutex_held(kmutex_t *mp);
 280
 281 /*
 282  * RW locks
 283  */
 284 #define RW_MAGIC        0x4d31fb123648e78aull
 285 #define RW_INIT         ((void *)NULL)
 286 #define RW_DEST         ((void *)-1UL)
 287
 288 typedef struct krwlock {
 289         void                    *rw_owner;
 290         void                    *rw_wr_owner;
 291         uint64_t                rw_magic;
 292         pthread_rwlock_t        rw_lock;
 293         uint_t                  rw_readers;
 294 } krwlock_t;
 295
 296 typedef int krw_t;
 297
 298 #define RW_READER       0
 299 #define RW_WRITER       1
 300 #define RW_DEFAULT      RW_READER
 301
 302 #define RW_READ_HELD(x)         ((x)->rw_readers > 0)
 303 #define RW_WRITE_HELD(x)        ((x)->rw_wr_owner == curthread)
 304 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 305
 306 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 307 extern void rw_destroy(krwlock_t *rwlp);
 308 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 309 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 310 extern int rw_tryupgrade(krwlock_t *rwlp);
 311 extern void rw_exit(krwlock_t *rwlp);
 312 #define rw_downgrade(rwlp) do { } while (0)
 313
 314 extern uid_t crgetuid(cred_t *cr);
 315 extern gid_t crgetgid(cred_t *cr);
 316 extern int crgetngroups(cred_t *cr);
 317 extern gid_t *crgetgroups(cred_t *cr);
 318
 319 /*
 320  * Condition variables
 321  */
 322 #define CV_MAGIC        0xd31ea9a83b1b30c4ull
 323
 324 typedef struct kcondvar {
 325         uint64_t                cv_magic;
 326         pthread_cond_t          cv;
 327 } kcondvar_t;
 328
 329 #define CV_DEFAULT      0
 330
 331 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 332 extern void cv_destroy(kcondvar_t *cv);
 333 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 334 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 335 extern void cv_signal(kcondvar_t *cv);
 336 extern void cv_broadcast(kcondvar_t *cv);
 337
 338 /*
 339  * kstat creation, installation and deletion
 340  */
 341 extern kstat_t *kstat_create(char *, int,
 342     char *, char *, uchar_t, ulong_t, uchar_t);
 343 extern void kstat_install(kstat_t *);
 344 extern void kstat_delete(kstat_t *);
 345
 346 /*
 347  * Kernel memory
 348  */
 349 #define KM_SLEEP                UMEM_NOFAIL
 350 #define KM_PUSHPAGE             KM_SLEEP
 351 #define KM_NOSLEEP              UMEM_DEFAULT
 352 #define KMC_NODEBUG             UMC_NODEBUG
 353 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 354 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 355 #define kmem_free(_b, _s)       umem_free(_b, _s)
 356 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 357         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 358 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 359 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 360 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 361 #define kmem_debugging()        0
 362 #define kmem_cache_reap_now(_c)         /* nothing */
 363 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 364 #define POINTER_INVALIDATE(_pp)         /* nothing */
 365 #define POINTER_IS_VALID(_p)    0
 366
 367 typedef umem_cache_t kmem_cache_t;
 368
 369 typedef enum kmem_cbrc {
 370         KMEM_CBRC_YES,
 371         KMEM_CBRC_NO,
 372         KMEM_CBRC_LATER,
 373         KMEM_CBRC_DONT_NEED,
 374         KMEM_CBRC_DONT_KNOW
 375 } kmem_cbrc_t;
 376
 377 /*
 378  * Task queues
 379  */
 380 typedef struct taskq taskq_t;
 381 typedef uintptr_t taskqid_t;
 382 typedef void (task_func_t)(void *);
 383
 384 #define TASKQ_PREPOPULATE       0x0001
 385 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 386 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 387 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 388 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 389
 390 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 391 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 392 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 393 #define TQ_FRONT        0x08            /* Queue in front */
 394
 395 extern taskq_t *system_taskq;
 396
 397 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 398 #define taskq_create_proc(a, b, c, d, e, p, f) \
 399             (taskq_create(a, b, c, d, e, f))
 400 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 401             (taskq_create(a, b, maxclsyspri, d, e, f))
 402 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 403 extern void     taskq_destroy(taskq_t *);
 404 extern void     taskq_wait(taskq_t *);
 405 extern int      taskq_member(taskq_t *, kthread_t *);
 406 extern void     system_taskq_init(void);
 407 extern void     system_taskq_fini(void);
 408
 409 #define XVA_MAPSIZE     3
 410 #define XVA_MAGIC       0x78766174
 411
 412 /*
 413  * vnodes
 414  */
 415 typedef struct vnode {
 416         uint64_t        v_size;
 417         int             v_fd;
 418         char            *v_path;
 419 } vnode_t;
 420
 421 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 422
 423 typedef struct xoptattr {
 424         timestruc_t     xoa_createtime; /* Create time of file */
 425         uint8_t         xoa_archive;
 426         uint8_t         xoa_system;
 427         uint8_t         xoa_readonly;
 428         uint8_t         xoa_hidden;
 429         uint8_t         xoa_nounlink;
 430         uint8_t         xoa_immutable;
 431         uint8_t         xoa_appendonly;
 432         uint8_t         xoa_nodump;
 433         uint8_t         xoa_settable;
 434         uint8_t         xoa_opaque;
 435         uint8_t         xoa_av_quarantined;
 436         uint8_t         xoa_av_modified;
 437         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 438         uint8_t         xoa_reparse;
 439         uint8_t         xoa_offline;
 440         uint8_t         xoa_sparse;
 441 } xoptattr_t;
 442
 443 typedef struct vattr {
 444         uint_t          va_mask;        /* bit-mask of attributes */
 445         u_offset_t      va_size;        /* file size in bytes */
 446 } vattr_t;
 447
 448
 449 typedef struct xvattr {
 450         vattr_t         xva_vattr;      /* Embedded vattr structure */
 451         uint32_t        xva_magic;      /* Magic Number */
 452         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 453         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 454         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 455         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 456         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 457 } xvattr_t;
 458
 459 typedef struct vsecattr {
 460         uint_t          vsa_mask;       /* See below */
 461         int             vsa_aclcnt;     /* ACL entry count */
 462         void            *vsa_aclentp;   /* pointer to ACL entries */
 463         int             vsa_dfaclcnt;   /* default ACL entry count */
 464         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 465         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 466 } vsecattr_t;
 467
 468 #define AT_TYPE         0x00001
 469 #define AT_MODE         0x00002
 470 #define AT_UID          0x00004
 471 #define AT_GID          0x00008
 472 #define AT_FSID         0x00010
 473 #define AT_NODEID       0x00020
 474 #define AT_NLINK        0x00040
 475 #define AT_SIZE         0x00080
 476 #define AT_ATIME        0x00100
 477 #define AT_MTIME        0x00200
 478 #define AT_CTIME        0x00400
 479 #define AT_RDEV         0x00800
 480 #define AT_BLKSIZE      0x01000
 481 #define AT_NBLOCKS      0x02000
 482 #define AT_SEQ          0x08000
 483 #define AT_XVATTR       0x10000
 484
 485 #define CRCREAT         0
 486
 487 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 488
 489 #define VOP_CLOSE(vp, f, c, o, cr, ct)  0
 490 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 491 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 492
 493 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 494
 495 #define VN_RELE(vp)     vn_close(vp)
 496
 497 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 498     int x2, int x3);
 499 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 500     int x2, int x3, vnode_t *vp, int fd);
 501 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 502     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 503 extern void vn_close(vnode_t *vp);
 504
 505 #define vn_remove(path, x1, x2)         remove(path)
 506 #define vn_rename(from, to, seg)        rename((from), (to))
 507 #define vn_is_readonly(vp)              B_FALSE
 508
 509 extern vnode_t *rootdir;
 510
 511 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 512
 513 /*
 514  * Random stuff
 515  */
 516 #define ddi_get_lbolt()         (gethrtime() >> 23)
 517 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 518 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 519
 520 extern void delay(clock_t ticks);
 521
 522 #define gethrestime_sec() time(NULL)
 523 #define gethrestime(t) \
 524         do {\
 525                 (t)->tv_sec = gethrestime_sec();\
 526                 (t)->tv_nsec = 0;\
 527         } while (0);
 528
 529 #define max_ncpus       64
 530
 531 #define minclsyspri     60
 532 #define maxclsyspri     99
 533
 534 #define CPU_SEQID       (pthread_self() & (max_ncpus - 1))
 535
 536 #define kcred           NULL
 537 #define CRED()          NULL
 538
 539 #define ptob(x)         ((x) * PAGESIZE)
 540
 541 extern uint64_t physmem;
 542
 543 extern int highbit(ulong_t i);
 544 extern int random_get_bytes(uint8_t *ptr, size_t len);
 545 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 546
 547 extern void kernel_init(int);
 548 extern void kernel_fini(void);
 549
 550 struct spa;
 551 extern void nicenum(uint64_t num, char *buf);
 552 extern void show_pool_stats(struct spa *);
 553
 554 typedef struct callb_cpr {
 555         kmutex_t        *cc_lockp;
 556 } callb_cpr_t;
 557
 558 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 559         (cp)->cc_lockp = lockp;                                 \
 560 }
 561
 562 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 563         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 564 }
 565
 566 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 567         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 568 }
 569
 570 #define CALLB_CPR_EXIT(cp) {                                    \
 571         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 572         mutex_exit((cp)->cc_lockp);                             \
 573 }
 574
 575 #define zone_dataset_visible(x, y)      (1)
 576 #define INGLOBALZONE(z)                 (1)
 577
 578 extern char *kmem_asprintf(const char *fmt, ...);
 579 #define strfree(str) kmem_free((str), strlen(str)+1)
 580
 581 /*
 582  * Hostname information
 583  */
 584 extern char hw_serial[];        /* for userland-emulated hostid access */
 585 extern int ddi_strtoul(const char *str, char **nptr, int base,
 586     unsigned long *result);
 587
 588 extern int ddi_strtoull(const char *str, char **nptr, int base,
 589     u_longlong_t *result);
 590
 591 /* ZFS Boot Related stuff. */
 592
 593 struct _buf {
 594         intptr_t        _fd;
 595 };
 596
 597 struct bootstat {
 598         uint64_t st_size;
 599 };
 600
 601 typedef struct ace_object {
 602         uid_t           a_who;
 603         uint32_t        a_access_mask;
 604         uint16_t        a_flags;
 605         uint16_t        a_type;
 606         uint8_t         a_obj_type[16];
 607         uint8_t         a_inherit_obj_type[16];
 608 } ace_object_t;
 609
 610
 611 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 612 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 613 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 614 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 615
 616 extern struct _buf *kobj_open_file(char *name);
 617 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 618     unsigned off);
 619 extern void kobj_close_file(struct _buf *file);
 620 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 621 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 622 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 623     cred_t *cr);
 624 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 625 extern zoneid_t getzoneid(void);
 626
 627 /* SID stuff */
 628 typedef struct ksiddomain {
 629         uint_t  kd_ref;
 630         uint_t  kd_len;
 631         char    *kd_name;
 632 } ksiddomain_t;
 633
 634 ksiddomain_t *ksid_lookupdomain(const char *);
 635 void ksiddomain_rele(ksiddomain_t *);
 636
 637 #define DDI_SLEEP       KM_SLEEP
 638 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 639         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 640
 641 #ifdef  __cplusplus
 642 }
 643 #endif
 644
 645 #endif  /* _SYS_ZFS_CONTEXT_H */