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 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 /*
  26  * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
  27  */
  28
  29 #ifndef _SYS_ZFS_CONTEXT_H
  30 #define _SYS_ZFS_CONTEXT_H
  31
  32 #ifdef __KERNEL__
  33
  34 #include <sys/note.h>
  35 #include <sys/types.h>
  36 #include <sys/t_lock.h>
  37 #include <sys/atomic.h>
  38 #include <sys/sysmacros.h>
  39 #include <sys/bitmap.h>
  40 #include <sys/cmn_err.h>
  41 #include <sys/kmem.h>
  42 #include <sys/taskq.h>
  43 #include <sys/buf.h>
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/cpuvar.h>
  47 #include <sys/kobj.h>
  48 #include <sys/conf.h>
  49 #include <sys/disp.h>
  50 #include <sys/debug.h>
  51 #include <sys/random.h>
  52 #include <sys/byteorder.h>
  53 #include <sys/systm.h>
  54 #include <sys/list.h>
  55 #include <sys/uio_impl.h>
  56 #include <sys/dirent.h>
  57 #include <sys/time.h>
  58 #include <vm/seg_kmem.h>
  59 #include <sys/zone.h>
  60 #include <sys/zfs_debug.h>
  61 #include <sys/fm/fs/zfs.h>
  62 #include <sys/sunddi.h>
  63 #include <sys/ctype.h>
  64 #include <sys/disp.h>
  65 #include <linux/dcache_compat.h>
  66
  67 #else /* _KERNEL */
  68
  69 #define _SYS_MUTEX_H
  70 #define _SYS_RWLOCK_H
  71 #define _SYS_CONDVAR_H
  72 #define _SYS_SYSTM_H
  73 #define _SYS_DEBUG_H
  74 #define _SYS_T_LOCK_H
  75 #define _SYS_VNODE_H
  76 #define _SYS_VFS_H
  77 #define _SYS_SUNDDI_H
  78 #define _SYS_CALLB_H
  79
  80 #include <stdio.h>
  81 #include <stdlib.h>
  82 #include <stddef.h>
  83 #include <stdarg.h>
  84 #include <fcntl.h>
  85 #include <unistd.h>
  86 #include <errno.h>
  87 #include <string.h>
  88 #include <strings.h>
  89 #include <pthread.h>
  90 #include <assert.h>
  91 #include <alloca.h>
  92 #include <umem.h>
  93 #include <limits.h>
  94 #include <atomic.h>
  95 #include <dirent.h>
  96 #include <time.h>
  97 #include <ctype.h>
  98 #include <sys/note.h>
  99 #include <sys/types.h>
 100 #include <sys/cred.h>
 101 #include <sys/sysmacros.h>
 102 #include <sys/bitmap.h>
 103 #include <sys/resource.h>
 104 #include <sys/byteorder.h>
 105 #include <sys/list.h>
 106 #include <sys/uio.h>
 107 #include <sys/zfs_debug.h>
 108 #include <sys/sdt.h>
 109 #include <sys/kstat.h>
 110 #include <sys/u8_textprep.h>
 111 #include <sys/fm/fs/zfs.h>
 112 #include <sys/sunddi.h>
 113
 114 /*
 115  * Stack
 116  */
 117
 118 #define  noinline       __attribute__((noinline))
 119
 120 /*
 121  * Debugging
 122  */
 123
 124 /*
 125  * Note that we are not using the debugging levels.
 126  */
 127
 128 #define CE_CONT         0       /* continuation         */
 129 #define CE_NOTE         1       /* notice               */
 130 #define CE_WARN         2       /* warning              */
 131 #define CE_PANIC        3       /* panic                */
 132 #define CE_IGNORE       4       /* print nothing        */
 133
 134 extern int aok;
 135
 136 /*
 137  * ZFS debugging
 138  */
 139
 140 extern void dprintf_setup(int *argc, char **argv);
 141 extern void __dprintf(const char *file, const char *func,
 142     int line, const char *fmt, ...);
 143 extern void cmn_err(int, const char *, ...);
 144 extern void vcmn_err(int, const char *, __va_list);
 145 extern void panic(const char *, ...);
 146 extern void vpanic(const char *, __va_list);
 147
 148 #define fm_panic        panic
 149
 150 /*
 151  * DTrace SDT probes have different signatures in userland than they do in
 152  * kernel.  If they're being used in kernel code, re-define them out of
 153  * existence for their counterparts in libzpool.
 154  */
 155
 156 #ifdef DTRACE_PROBE
 157 #undef  DTRACE_PROBE
 158 #define DTRACE_PROBE(a) ((void)0)
 159 #endif  /* DTRACE_PROBE */
 160
 161 #ifdef DTRACE_PROBE1
 162 #undef  DTRACE_PROBE1
 163 #define DTRACE_PROBE1(a, b, c)  ((void)0)
 164 #endif  /* DTRACE_PROBE1 */
 165
 166 #ifdef DTRACE_PROBE2
 167 #undef  DTRACE_PROBE2
 168 #define DTRACE_PROBE2(a, b, c, d, e)    ((void)0)
 169 #endif  /* DTRACE_PROBE2 */
 170
 171 #ifdef DTRACE_PROBE3
 172 #undef  DTRACE_PROBE3
 173 #define DTRACE_PROBE3(a, b, c, d, e, f, g)      ((void)0)
 174 #endif  /* DTRACE_PROBE3 */
 175
 176 #ifdef DTRACE_PROBE4
 177 #undef  DTRACE_PROBE4
 178 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 179 #endif  /* DTRACE_PROBE4 */
 180
 181 /*
 182  * Threads
 183  */
 184 #define TS_MAGIC                0x72f158ab4261e538ull
 185 #define TS_RUN                  0x00000002
 186 #ifdef __linux__
 187 #define STACK_SIZE              8192    /* Linux x86 and amd64 */
 188 #else
 189 #define STACK_SIZE              24576   /* Solaris */
 190 #endif
 191
 192 #ifdef NPTL_GUARD_WITHIN_STACK
 193 #define EXTRA_GUARD_BYTES       PAGESIZE
 194 #else
 195 #define EXTRA_GUARD_BYTES       0
 196 #endif
 197
 198 /* in libzpool, p0 exists only to have its address taken */
 199 typedef struct proc {
 200         uintptr_t       this_is_never_used_dont_dereference_it;
 201 } proc_t;
 202
 203 extern struct proc p0;
 204
 205 typedef void (*thread_func_t)(void *);
 206 typedef void (*thread_func_arg_t)(void *);
 207 typedef pthread_t kt_did_t;
 208
 209 typedef struct kthread {
 210         kt_did_t        t_tid;
 211         thread_func_t   t_func;
 212         void *          t_arg;
 213 } kthread_t;
 214
 215 #define tsd_get(key)                    pthread_getspecific(key)
 216 #define tsd_set(key, val)               pthread_setspecific(key, val)
 217 #define curthread                       zk_thread_current()
 218 #define thread_exit                     zk_thread_exit
 219 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 220         zk_thread_create(stk, stksize, (thread_func_t)func, arg,        \
 221                          len, NULL, state, pri)
 222 #define thread_join(t)                  zk_thread_join(t)
 223 #define newproc(f,a,cid,pri,ctp,pid)    (ENOSYS)
 224
 225 extern kthread_t *zk_thread_current(void);
 226 extern void zk_thread_exit(void);
 227 extern kthread_t *zk_thread_create(caddr_t stk, size_t  stksize,
 228         thread_func_t func, void *arg, size_t len,
 229         proc_t *pp, int state, pri_t pri);
 230 extern void zk_thread_join(kt_did_t tid);
 231
 232 #define kpreempt_disable()      ((void)0)
 233 #define kpreempt_enable()       ((void)0)
 234
 235 #define PS_NONE         -1
 236
 237 #define issig(why)      (FALSE)
 238 #define ISSIG(thr, why) (FALSE)
 239
 240 /*
 241  * Mutexes
 242  */
 243 #define MTX_MAGIC       0x9522f51362a6e326ull
 244 #define MTX_INIT        ((void *)NULL)
 245 #define MTX_DEST        ((void *)-1UL)
 246
 247 typedef struct kmutex {
 248         void            *m_owner;
 249         uint64_t        m_magic;
 250         pthread_mutex_t m_lock;
 251 } kmutex_t;
 252
 253 #define MUTEX_DEFAULT   0
 254 #define MUTEX_HELD(m)   ((m)->m_owner == curthread)
 255 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 256
 257 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 258 extern void mutex_destroy(kmutex_t *mp);
 259 extern void mutex_enter(kmutex_t *mp);
 260 extern void mutex_exit(kmutex_t *mp);
 261 extern int mutex_tryenter(kmutex_t *mp);
 262 extern void *mutex_owner(kmutex_t *mp);
 263 extern int mutex_held(kmutex_t *mp);
 264
 265 /*
 266  * RW locks
 267  */
 268 #define RW_MAGIC        0x4d31fb123648e78aull
 269 #define RW_INIT         ((void *)NULL)
 270 #define RW_DEST         ((void *)-1UL)
 271
 272 typedef struct krwlock {
 273         void                    *rw_owner;
 274         void                    *rw_wr_owner;
 275         uint64_t                rw_magic;
 276         pthread_rwlock_t        rw_lock;
 277         uint_t                  rw_readers;
 278 } krwlock_t;
 279
 280 typedef int krw_t;
 281
 282 #define RW_READER       0
 283 #define RW_WRITER       1
 284 #define RW_DEFAULT      RW_READER
 285
 286 #define RW_READ_HELD(x)         ((x)->rw_readers > 0)
 287 #define RW_WRITE_HELD(x)        ((x)->rw_wr_owner == curthread)
 288 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 289
 290 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 291 extern void rw_destroy(krwlock_t *rwlp);
 292 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 293 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 294 extern int rw_tryupgrade(krwlock_t *rwlp);
 295 extern void rw_exit(krwlock_t *rwlp);
 296 #define rw_downgrade(rwlp) do { } while (0)
 297
 298 extern uid_t crgetuid(cred_t *cr);
 299 extern gid_t crgetgid(cred_t *cr);
 300 extern int crgetngroups(cred_t *cr);
 301 extern gid_t *crgetgroups(cred_t *cr);
 302
 303 /*
 304  * Condition variables
 305  */
 306 #define CV_MAGIC        0xd31ea9a83b1b30c4ull
 307
 308 typedef struct kcondvar {
 309         uint64_t                cv_magic;
 310         pthread_cond_t          cv;
 311 } kcondvar_t;
 312
 313 #define CV_DEFAULT      0
 314
 315 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 316 extern void cv_destroy(kcondvar_t *cv);
 317 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 318 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 319 extern void cv_signal(kcondvar_t *cv);
 320 extern void cv_broadcast(kcondvar_t *cv);
 321 #define cv_timedwait_interruptible(cv, mp, at)  cv_timedwait(cv, mp, at)
 322 #define cv_wait_interruptible(cv, mp)           cv_wait(cv, mp)
 323
 324 /*
 325  * kstat creation, installation and deletion
 326  */
 327 extern kstat_t *kstat_create(char *, int,
 328     char *, char *, uchar_t, ulong_t, uchar_t);
 329 extern void kstat_install(kstat_t *);
 330 extern void kstat_delete(kstat_t *);
 331
 332 /*
 333  * Kernel memory
 334  */
 335 #define KM_SLEEP                UMEM_NOFAIL
 336 #define KM_PUSHPAGE             KM_SLEEP
 337 #define KM_NOSLEEP              UMEM_DEFAULT
 338 #define KM_NODEBUG              0x0
 339 #define KMC_NODEBUG             UMC_NODEBUG
 340 #define KMC_KMEM                0x0
 341 #define KMC_VMEM                0x0
 342 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 343 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 344 #define kmem_free(_b, _s)       umem_free(_b, _s)
 345 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 346 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 347 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 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
 359 typedef umem_cache_t kmem_cache_t;
 360
 361 typedef 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  */
 372 typedef struct taskq taskq_t;
 373 typedef uintptr_t taskqid_t;
 374 typedef void (task_func_t)(void *);
 375
 376 typedef 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_PUSHPAGE     KM_PUSHPAGE     /* Cannot perform I/O */
 395 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 396 #define TQ_FRONT        0x08            /* Queue in front */
 397
 398 extern taskq_t *system_taskq;
 399
 400 extern 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))
 405 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 406 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 407     taskq_ent_t *);
 408 extern int      taskq_empty_ent(taskq_ent_t *);
 409 extern void     taskq_init_ent(taskq_ent_t *);
 410 extern void     taskq_destroy(taskq_t *);
 411 extern void     taskq_wait(taskq_t *);
 412 extern int      taskq_member(taskq_t *, kthread_t *);
 413 extern void     system_taskq_init(void);
 414 extern void     system_taskq_fini(void);
 415
 416 #define XVA_MAPSIZE     3
 417 #define XVA_MAGIC       0x78766174
 418
 419 /*
 420  * vnodes
 421  */
 422 typedef struct vnode {
 423         uint64_t        v_size;
 424         int             v_fd;
 425         char            *v_path;
 426 } vnode_t;
 427
 428 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 429
 430 typedef struct xoptattr {
 431         timestruc_t     xoa_createtime; /* Create time of file */
 432         uint8_t         xoa_archive;
 433         uint8_t         xoa_system;
 434         uint8_t         xoa_readonly;
 435         uint8_t         xoa_hidden;
 436         uint8_t         xoa_nounlink;
 437         uint8_t         xoa_immutable;
 438         uint8_t         xoa_appendonly;
 439         uint8_t         xoa_nodump;
 440         uint8_t         xoa_settable;
 441         uint8_t         xoa_opaque;
 442         uint8_t         xoa_av_quarantined;
 443         uint8_t         xoa_av_modified;
 444         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 445         uint8_t         xoa_reparse;
 446         uint8_t         xoa_offline;
 447         uint8_t         xoa_sparse;
 448 } xoptattr_t;
 449
 450 typedef struct vattr {
 451         uint_t          va_mask;        /* bit-mask of attributes */
 452         u_offset_t      va_size;        /* file size in bytes */
 453 } vattr_t;
 454
 455
 456 typedef struct xvattr {
 457         vattr_t         xva_vattr;      /* Embedded vattr structure */
 458         uint32_t        xva_magic;      /* Magic Number */
 459         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 460         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 461         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 462         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 463         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 464 } xvattr_t;
 465
 466 typedef struct vsecattr {
 467         uint_t          vsa_mask;       /* See below */
 468         int             vsa_aclcnt;     /* ACL entry count */
 469         void            *vsa_aclentp;   /* pointer to ACL entries */
 470         int             vsa_dfaclcnt;   /* default ACL entry count */
 471         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 472         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 473 } vsecattr_t;
 474
 475 #define AT_TYPE         0x00001
 476 #define AT_MODE         0x00002
 477 #define AT_UID          0x00004
 478 #define AT_GID          0x00008
 479 #define AT_FSID         0x00010
 480 #define AT_NODEID       0x00020
 481 #define AT_NLINK        0x00040
 482 #define AT_SIZE         0x00080
 483 #define AT_ATIME        0x00100
 484 #define AT_MTIME        0x00200
 485 #define AT_CTIME        0x00400
 486 #define AT_RDEV         0x00800
 487 #define AT_BLKSIZE      0x01000
 488 #define AT_NBLOCKS      0x02000
 489 #define AT_SEQ          0x08000
 490 #define AT_XVATTR       0x10000
 491
 492 #define CRCREAT         0
 493
 494 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 495
 496 #define VOP_CLOSE(vp, f, c, o, cr, ct)  0
 497 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 498 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 499
 500 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 501
 502 #define VN_RELE(vp)     vn_close(vp)
 503
 504 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 505     int x2, int x3);
 506 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 507     int x2, int x3, vnode_t *vp, int fd);
 508 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 509     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 510 extern void vn_close(vnode_t *vp);
 511
 512 #define vn_remove(path, x1, x2)         remove(path)
 513 #define vn_rename(from, to, seg)        rename((from), (to))
 514 #define vn_is_readonly(vp)              B_FALSE
 515
 516 extern vnode_t *rootdir;
 517
 518 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 519
 520 /*
 521  * Random stuff
 522  */
 523 #define ddi_get_lbolt()         (gethrtime() >> 23)
 524 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 525 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 526
 527 extern void delay(clock_t ticks);
 528
 529 #define gethrestime_sec() time(NULL)
 530 #define gethrestime(t) \
 531         do {\
 532                 (t)->tv_sec = gethrestime_sec();\
 533                 (t)->tv_nsec = 0;\
 534         } while (0);
 535
 536 #define max_ncpus       64
 537
 538 #define minclsyspri     60
 539 #define maxclsyspri     99
 540
 541 #define CPU_SEQID       (pthread_self() & (max_ncpus - 1))
 542
 543 #define kcred           NULL
 544 #define CRED()          NULL
 545
 546 #define ptob(x)         ((x) * PAGESIZE)
 547
 548 extern uint64_t physmem;
 549
 550 extern int highbit(ulong_t i);
 551 extern int random_get_bytes(uint8_t *ptr, size_t len);
 552 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 553
 554 extern void kernel_init(int);
 555 extern void kernel_fini(void);
 556
 557 struct spa;
 558 extern void nicenum(uint64_t num, char *buf);
 559 extern void show_pool_stats(struct spa *);
 560
 561 typedef struct callb_cpr {
 562         kmutex_t        *cc_lockp;
 563 } callb_cpr_t;
 564
 565 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 566         (cp)->cc_lockp = lockp;                                 \
 567 }
 568
 569 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 570         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 571 }
 572
 573 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 574         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 575 }
 576
 577 #define CALLB_CPR_EXIT(cp) {                                    \
 578         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 579         mutex_exit((cp)->cc_lockp);                             \
 580 }
 581
 582 #define zone_dataset_visible(x, y)      (1)
 583 #define INGLOBALZONE(z)                 (1)
 584
 585 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 586 extern char *kmem_asprintf(const char *fmt, ...);
 587 #define strfree(str) kmem_free((str), strlen(str)+1)
 588
 589 /*
 590  * Hostname information
 591  */
 592 extern char hw_serial[];        /* for userland-emulated hostid access */
 593 extern int ddi_strtoul(const char *str, char **nptr, int base,
 594     unsigned long *result);
 595
 596 extern int ddi_strtoull(const char *str, char **nptr, int base,
 597     u_longlong_t *result);
 598
 599 /* ZFS Boot Related stuff. */
 600
 601 struct _buf {
 602         intptr_t        _fd;
 603 };
 604
 605 struct bootstat {
 606         uint64_t st_size;
 607 };
 608
 609 typedef struct ace_object {
 610         uid_t           a_who;
 611         uint32_t        a_access_mask;
 612         uint16_t        a_flags;
 613         uint16_t        a_type;
 614         uint8_t         a_obj_type[16];
 615         uint8_t         a_inherit_obj_type[16];
 616 } ace_object_t;
 617
 618
 619 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 620 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 621 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 622 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 623
 624 extern struct _buf *kobj_open_file(char *name);
 625 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 626     unsigned off);
 627 extern void kobj_close_file(struct _buf *file);
 628 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 629 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 630 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 631     cred_t *cr);
 632 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 633 extern zoneid_t getzoneid(void);
 634
 635 /* SID stuff */
 636 typedef struct ksiddomain {
 637         uint_t  kd_ref;
 638         uint_t  kd_len;
 639         char    *kd_name;
 640 } ksiddomain_t;
 641
 642 ksiddomain_t *ksid_lookupdomain(const char *);
 643 void ksiddomain_rele(ksiddomain_t *);
 644
 645 #define DDI_SLEEP       KM_SLEEP
 646 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 647         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 648
 649 #endif /* _KERNEL */
 650
 651 #endif  /* _SYS_ZFS_CONTEXT_H */