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 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_DEBUG_H
  40 #define _SYS_T_LOCK_H
  41 #define _SYS_VNODE_H
  42 #define _SYS_VFS_H
  43 #define _SYS_SUNDDI_H
  44 #define _SYS_CALLB_H
  45 
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <stddef.h>
  49 #include <stdarg.h>
  50 #include <fcntl.h>
  51 #include <unistd.h>
  52 #include <errno.h>
  53 #include <string.h>
  54 #include <strings.h>
  55 #include <synch.h>
  56 #include <thread.h>
  57 #include <assert.h>
  58 #include <alloca.h>
  59 #include <umem.h>
  60 #include <limits.h>
  61 #include <atomic.h>
  62 #include <dirent.h>
  63 #include <time.h>
  64 #include <libsysevent.h>
  65 #include <sys/note.h>
  66 #include <sys/types.h>
  67 #include <sys/cred.h>
  68 #include <sys/sysmacros.h>
  69 #include <sys/bitmap.h>
  70 #include <sys/resource.h>
  71 #include <sys/byteorder.h>
  72 #include <sys/list.h>
  73 #include <sys/uio.h>
  74 #include <sys/zfs_debug.h>
  75 #include <sys/sdt.h>
  76 #include <sys/kstat.h>
  77 #include <sys/u8_textprep.h>
  78 #include <sys/sysevent/eventdefs.h>
  79 #include <sys/sysevent/dev.h>
  80 #include <sys/sunddi.h>
  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 /*
  97  * ZFS debugging
  98  */
  99 
 100 #ifdef ZFS_DEBUG
 101 extern void dprintf_setup(int *argc, char **argv);
 102 #endif /* ZFS_DEBUG */
 103 
 104 extern void cmn_err(int, const char *, ...);
 105 extern void vcmn_err(int, const char *, __va_list);
 106 extern void panic(const char *, ...);
 107 extern void vpanic(const char *, __va_list);
 108 
 109 #define fm_panic        panic
 110 
 111 extern int aok;
 112 
 113 /* This definition is copied from assert.h. */
 114 #if defined(__STDC__)
 115 #if __STDC_VERSION__ - 0 >= 199901L
 116 #define zverify(EX) (void)((EX) || (aok) || \
 117         (__assert_c99(#EX, __FILE__, __LINE__, __func__), 0))
 118 #else
 119 #define zverify(EX) (void)((EX) || (aok) || \
 120         (__assert(#EX, __FILE__, __LINE__), 0))
 121 #endif /* __STDC_VERSION__ - 0 >= 199901L */
 122 #else
 123 #define zverify(EX) (void)((EX) || (aok) || \
 124         (_assert("EX", __FILE__, __LINE__), 0))
 125 #endif  /* __STDC__ */
 126 
 127 
 128 #define VERIFY  zverify
 129 #define ASSERT  zverify
 130 #undef  assert
 131 #define assert  zverify
 132 
 133 extern void __assert(const char *, const char *, int);
 134 
 135 #ifdef lint
 136 #define VERIFY3_IMPL(x, y, z, t)        if (x == z) ((void)0)
 137 #else
 138 /* BEGIN CSTYLED */
 139 #define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
 140         const TYPE __left = (TYPE)(LEFT); \
 141         const TYPE __right = (TYPE)(RIGHT); \
 142         if (!(__left OP __right) && (!aok)) { \
 143                 char *__buf = alloca(256); \
 144                 (void) snprintf(__buf, 256, "%s %s %s (0x%llx %s 0x%llx)", \
 145                         #LEFT, #OP, #RIGHT, \
 146                         (u_longlong_t)__left, #OP, (u_longlong_t)__right); \
 147                 __assert(__buf, __FILE__, __LINE__); \
 148         } \
 149 _NOTE(CONSTCOND) } while (0)
 150 /* END CSTYLED */
 151 #endif /* lint */
 152 
 153 #define VERIFY3S(x, y, z)       VERIFY3_IMPL(x, y, z, int64_t)
 154 #define VERIFY3U(x, y, z)       VERIFY3_IMPL(x, y, z, uint64_t)
 155 #define VERIFY3P(x, y, z)       VERIFY3_IMPL(x, y, z, uintptr_t)
 156 
 157 #ifdef NDEBUG
 158 #define ASSERT3S(x, y, z)       ((void)0)
 159 #define ASSERT3U(x, y, z)       ((void)0)
 160 #define ASSERT3P(x, y, z)       ((void)0)
 161 #else
 162 #define ASSERT3S(x, y, z)       VERIFY3S(x, y, z)
 163 #define ASSERT3U(x, y, z)       VERIFY3U(x, y, z)
 164 #define ASSERT3P(x, y, z)       VERIFY3P(x, y, z)
 165 #endif
 166 
 167 /*
 168  * DTrace SDT probes have different signatures in userland than they do in
 169  * kernel.  If they're being used in kernel code, re-define them out of
 170  * existence for their counterparts in libzpool.
 171  */
 172 
 173 #ifdef DTRACE_PROBE
 174 #undef  DTRACE_PROBE
 175 #define DTRACE_PROBE(a) ((void)0)
 176 #endif  /* DTRACE_PROBE */
 177 
 178 #ifdef DTRACE_PROBE1
 179 #undef  DTRACE_PROBE1
 180 #define DTRACE_PROBE1(a, b, c)  ((void)0)
 181 #endif  /* DTRACE_PROBE1 */
 182 
 183 #ifdef DTRACE_PROBE2
 184 #undef  DTRACE_PROBE2
 185 #define DTRACE_PROBE2(a, b, c, d, e)    ((void)0)
 186 #endif  /* DTRACE_PROBE2 */
 187 
 188 #ifdef DTRACE_PROBE3
 189 #undef  DTRACE_PROBE3
 190 #define DTRACE_PROBE3(a, b, c, d, e, f, g)      ((void)0)
 191 #endif  /* DTRACE_PROBE3 */
 192 
 193 #ifdef DTRACE_PROBE4
 194 #undef  DTRACE_PROBE4
 195 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 196 #endif  /* DTRACE_PROBE4 */
 197 
 198 /*
 199  * Threads
 200  */
 201 #define curthread       ((void *)(uintptr_t)thr_self())
 202 
 203 typedef struct kthread kthread_t;
 204 
 205 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 206         zk_thread_create(func, arg)
 207 #define thread_exit() thr_exit(NULL)
 208 #define thread_join(t)  panic("libzpool cannot join threads")
 209 
 210 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 211 
 212 /* in libzpool, p0 exists only to have its address taken */
 213 struct proc {
 214         uintptr_t       this_is_never_used_dont_dereference_it;
 215 };
 216 
 217 extern struct proc p0;
 218 #define curproc         (&p0)
 219 
 220 #define PS_NONE         -1
 221 
 222 extern kthread_t *zk_thread_create(void (*func)(), void *arg);
 223 
 224 #define issig(why)      (FALSE)
 225 #define ISSIG(thr, why) (FALSE)
 226 
 227 /*
 228  * Mutexes
 229  */
 230 typedef struct kmutex {
 231         void            *m_owner;
 232         boolean_t       initialized;
 233         mutex_t         m_lock;
 234 } kmutex_t;
 235 
 236 #define MUTEX_DEFAULT   USYNC_THREAD
 237 #undef  MUTEX_HELD
 238 #undef  MUTEX_NOT_HELD
 239 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock)
 240 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 241 
 242 /*
 243  * Argh -- we have to get cheesy here because the kernel and userland
 244  * have different signatures for the same routine.
 245  */
 246 extern int _mutex_init(mutex_t *mp, int type, void *arg);
 247 extern int _mutex_destroy(mutex_t *mp);
 248 
 249 #define mutex_init(mp, b, c, d)         zmutex_init((kmutex_t *)(mp))
 250 #define mutex_destroy(mp)               zmutex_destroy((kmutex_t *)(mp))
 251 
 252 extern void zmutex_init(kmutex_t *mp);
 253 extern void zmutex_destroy(kmutex_t *mp);
 254 extern void mutex_enter(kmutex_t *mp);
 255 extern void mutex_exit(kmutex_t *mp);
 256 extern int mutex_tryenter(kmutex_t *mp);
 257 extern void *mutex_owner(kmutex_t *mp);
 258 
 259 /*
 260  * RW locks
 261  */
 262 typedef struct krwlock {
 263         void            *rw_owner;
 264         boolean_t       initialized;
 265         rwlock_t        rw_lock;
 266 } krwlock_t;
 267 
 268 typedef int krw_t;
 269 
 270 #define RW_READER       0
 271 #define RW_WRITER       1
 272 #define RW_DEFAULT      USYNC_THREAD
 273 
 274 #undef RW_READ_HELD
 275 #define RW_READ_HELD(x)         _rw_read_held(&(x)->rw_lock)
 276 
 277 #undef RW_WRITE_HELD
 278 #define RW_WRITE_HELD(x)        _rw_write_held(&(x)->rw_lock)
 279 
 280 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 281 extern void rw_destroy(krwlock_t *rwlp);
 282 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 283 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 284 extern int rw_tryupgrade(krwlock_t *rwlp);
 285 extern void rw_exit(krwlock_t *rwlp);
 286 #define rw_downgrade(rwlp) do { } while (0)
 287 
 288 extern uid_t crgetuid(cred_t *cr);
 289 extern gid_t crgetgid(cred_t *cr);
 290 extern int crgetngroups(cred_t *cr);
 291 extern gid_t *crgetgroups(cred_t *cr);
 292 
 293 /*
 294  * Condition variables
 295  */
 296 typedef cond_t kcondvar_t;
 297 
 298 #define CV_DEFAULT      USYNC_THREAD
 299 
 300 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 301 extern void cv_destroy(kcondvar_t *cv);
 302 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 303 extern int  cv_wait_sig(kcondvar_t *cv, kmutex_t *mp);
 304 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 305 extern void cv_signal(kcondvar_t *cv);
 306 extern void cv_broadcast(kcondvar_t *cv);
 307 
 308 /*
 309  * kstat creation, installation and deletion
 310  */
 311 extern kstat_t *kstat_create(char *, int,
 312     char *, char *, uchar_t, ulong_t, uchar_t);
 313 extern void kstat_install(kstat_t *);
 314 extern void kstat_delete(kstat_t *);
 315 
 316 /*
 317  * Kernel memory
 318  */
 319 #define KM_SLEEP                UMEM_NOFAIL
 320 #define KM_PUSHPAGE             KM_SLEEP
 321 #define KM_NOSLEEP              UMEM_DEFAULT
 322 #define KMC_NODEBUG             UMC_NODEBUG
 323 #define KMC_NOTOUCH             0       /* not needed for userland caches */
 324 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 325 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 326 #define kmem_free(_b, _s)       umem_free(_b, _s)
 327 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 328         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 329 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 330 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 331 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 332 #define kmem_debugging()        0
 333 #define kmem_cache_reap_now(_c)         /* nothing */
 334 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 335 #define vmem_qcache_reap(_v)            /* nothing */
 336 #define POINTER_INVALIDATE(_pp)         /* nothing */
 337 #define POINTER_IS_VALID(_p)    0
 338 
 339 extern vmem_t *zio_arena;
 340 
 341 typedef umem_cache_t kmem_cache_t;
 342 
 343 typedef enum kmem_cbrc {
 344         KMEM_CBRC_YES,
 345         KMEM_CBRC_NO,
 346         KMEM_CBRC_LATER,
 347         KMEM_CBRC_DONT_NEED,
 348         KMEM_CBRC_DONT_KNOW
 349 } kmem_cbrc_t;
 350 
 351 /*
 352  * Task queues
 353  */
 354 typedef struct taskq taskq_t;
 355 typedef uintptr_t taskqid_t;
 356 typedef void (task_func_t)(void *);
 357 
 358 typedef struct taskq_ent {
 359         struct taskq_ent        *tqent_next;
 360         struct taskq_ent        *tqent_prev;
 361         task_func_t             *tqent_func;
 362         void                    *tqent_arg;
 363         uintptr_t               tqent_flags;
 364 } taskq_ent_t;
 365 
 366 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 367 
 368 #define TASKQ_PREPOPULATE       0x0001
 369 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 370 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 371 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 372 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 373 
 374 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 375 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 376 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 377 #define TQ_FRONT        0x08            /* Queue in front */
 378 
 379 
 380 extern taskq_t *system_taskq;
 381 
 382 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 383 #define taskq_create_proc(a, b, c, d, e, p, f) \
 384             (taskq_create(a, b, c, d, e, f))
 385 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 386             (taskq_create(a, b, maxclsyspri, d, e, f))
 387 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 388 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 389     taskq_ent_t *);
 390 extern void     taskq_destroy(taskq_t *);
 391 extern void     taskq_wait(taskq_t *);
 392 extern int      taskq_member(taskq_t *, void *);
 393 extern void     system_taskq_init(void);
 394 extern void     system_taskq_fini(void);
 395 
 396 #define XVA_MAPSIZE     3
 397 #define XVA_MAGIC       0x78766174
 398 
 399 /*
 400  * vnodes
 401  */
 402 typedef struct vnode {
 403         uint64_t        v_size;
 404         int             v_fd;
 405         char            *v_path;
 406 } vnode_t;
 407 
 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 gethrestime_sec() time(NULL)
 510 #define gethrestime(t) \
 511         do {\
 512                 (t)->tv_sec = gethrestime_sec();\
 513                 (t)->tv_nsec = 0;\
 514         } while (0);
 515 
 516 #define max_ncpus       64
 517 
 518 #define minclsyspri     60
 519 #define maxclsyspri     99
 520 
 521 #define CPU_SEQID       (thr_self() & (max_ncpus - 1))
 522 
 523 #define kcred           NULL
 524 #define CRED()          NULL
 525 
 526 #define ptob(x)         ((x) * PAGESIZE)
 527 
 528 extern uint64_t physmem;
 529 
 530 extern int highbit(ulong_t i);
 531 extern int random_get_bytes(uint8_t *ptr, size_t len);
 532 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 533 
 534 extern void kernel_init(int);
 535 extern void kernel_fini(void);
 536 
 537 struct spa;
 538 extern void nicenum(uint64_t num, char *buf);
 539 extern void show_pool_stats(struct spa *);
 540 
 541 typedef struct callb_cpr {
 542         kmutex_t        *cc_lockp;
 543 } callb_cpr_t;
 544 
 545 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 546         (cp)->cc_lockp = lockp;                                      \
 547 }
 548 
 549 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 550         ASSERT(MUTEX_HELD((cp)->cc_lockp));                  \
 551 }
 552 
 553 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 554         ASSERT(MUTEX_HELD((cp)->cc_lockp));                  \
 555 }
 556 
 557 #define CALLB_CPR_EXIT(cp) {                                    \
 558         ASSERT(MUTEX_HELD((cp)->cc_lockp));                  \
 559         mutex_exit((cp)->cc_lockp);                          \
 560 }
 561 
 562 #define zone_dataset_visible(x, y)      (1)
 563 #define INGLOBALZONE(z)                 (1)
 564 
 565 extern char *kmem_asprintf(const char *fmt, ...);
 566 #define strfree(str) kmem_free((str), strlen(str)+1)
 567 
 568 /*
 569  * Hostname information
 570  */
 571 extern char hw_serial[];        /* for userland-emulated hostid access */
 572 extern int ddi_strtoul(const char *str, char **nptr, int base,
 573     unsigned long *result);
 574 
 575 extern int ddi_strtoull(const char *str, char **nptr, int base,
 576     u_longlong_t *result);
 577 
 578 /* ZFS Boot Related stuff. */
 579 
 580 struct _buf {
 581         intptr_t        _fd;
 582 };
 583 
 584 struct bootstat {
 585         uint64_t st_size;
 586 };
 587 
 588 typedef struct ace_object {
 589         uid_t           a_who;
 590         uint32_t        a_access_mask;
 591         uint16_t        a_flags;
 592         uint16_t        a_type;
 593         uint8_t         a_obj_type[16];
 594         uint8_t         a_inherit_obj_type[16];
 595 } ace_object_t;
 596 
 597 
 598 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 599 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 600 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 601 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 602 
 603 extern struct _buf *kobj_open_file(char *name);
 604 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 605     unsigned off);
 606 extern void kobj_close_file(struct _buf *file);
 607 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 608 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 609 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 610     cred_t *cr);
 611 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 612 extern zoneid_t getzoneid(void);
 613 
 614 /* SID stuff */
 615 typedef struct ksiddomain {
 616         uint_t  kd_ref;
 617         uint_t  kd_len;
 618         char    *kd_name;
 619 } ksiddomain_t;
 620 
 621 ksiddomain_t *ksid_lookupdomain(const char *);
 622 void ksiddomain_rele(ksiddomain_t *);
 623 
 624 #define DDI_SLEEP       KM_SLEEP
 625 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 626         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 627 
 628 #ifdef  __cplusplus
 629 }
 630 #endif
 631 
 632 #endif  /* _SYS_ZFS_CONTEXT_H */