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  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  28  * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
  29  */
  30
  31 #ifndef _SYS_ZFS_CONTEXT_H
  32 #define _SYS_ZFS_CONTEXT_H
  33
  34 #ifdef __KERNEL__
  35
  36 #include <sys/note.h>
  37 #include <sys/types.h>
  38 #include <sys/t_lock.h>
  39 #include <sys/atomic.h>
  40 #include <sys/sysmacros.h>
  41 #include <sys/bitmap.h>
  42 #include <sys/cmn_err.h>
  43 #include <sys/kmem.h>
  44 #include <sys/kmem_cache.h>
  45 #include <sys/vmem.h>
  46 #include <sys/taskq.h>
  47 #include <sys/buf.h>
  48 #include <sys/param.h>
  49 #include <sys/systm.h>
  50 #include <sys/cpuvar.h>
  51 #include <sys/kobj.h>
  52 #include <sys/conf.h>
  53 #include <sys/disp.h>
  54 #include <sys/debug.h>
  55 #include <sys/random.h>
  56 #include <sys/byteorder.h>
  57 #include <sys/systm.h>
  58 #include <sys/list.h>
  59 #include <sys/uio_impl.h>
  60 #include <sys/dirent.h>
  61 #include <sys/time.h>
  62 #include <vm/seg_kmem.h>
  63 #include <sys/zone.h>
  64 #include <sys/sdt.h>
  65 #include <sys/zfs_debug.h>
  66 #include <sys/zfs_delay.h>
  67 #include <sys/fm/fs/zfs.h>
  68 #include <sys/sunddi.h>
  69 #include <sys/ctype.h>
  70 #include <sys/disp.h>
  71 #include <sys/trace.h>
  72 #include <linux/dcache_compat.h>
  73 #include <linux/utsname_compat.h>
  74
  75 #else /* _KERNEL */
  76
  77 #define _SYS_MUTEX_H
  78 #define _SYS_RWLOCK_H
  79 #define _SYS_CONDVAR_H
  80 #define _SYS_SYSTM_H
  81 #define _SYS_T_LOCK_H
  82 #define _SYS_VNODE_H
  83 #define _SYS_VFS_H
  84 #define _SYS_SUNDDI_H
  85 #define _SYS_CALLB_H
  86
  87 #include <stdio.h>
  88 #include <stdlib.h>
  89 #include <stddef.h>
  90 #include <stdarg.h>
  91 #include <fcntl.h>
  92 #include <unistd.h>
  93 #include <errno.h>
  94 #include <string.h>
  95 #include <strings.h>
  96 #include <pthread.h>
  97 #include <synch.h>
  98 #include <assert.h>
  99 #include <alloca.h>
 100 #include <umem.h>
 101 #include <limits.h>
 102 #include <atomic.h>
 103 #include <dirent.h>
 104 #include <time.h>
 105 #include <ctype.h>
 106 #include <signal.h>
 107 #include <sys/mman.h>
 108 #include <sys/note.h>
 109 #include <sys/types.h>
 110 #include <sys/cred.h>
 111 #include <sys/sysmacros.h>
 112 #include <sys/bitmap.h>
 113 #include <sys/resource.h>
 114 #include <sys/byteorder.h>
 115 #include <sys/list.h>
 116 #include <sys/uio.h>
 117 #include <sys/zfs_debug.h>
 118 #include <sys/sdt.h>
 119 #include <sys/kstat.h>
 120 #include <sys/u8_textprep.h>
 121 #include <sys/fm/fs/zfs.h>
 122 #include <sys/sunddi.h>
 123 #include <sys/debug.h>
 124 #include <sys/utsname.h>
 125
 126 /*
 127  * Stack
 128  */
 129
 130 #define noinline        __attribute__((noinline))
 131
 132 /*
 133  * Debugging
 134  */
 135
 136 /*
 137  * Note that we are not using the debugging levels.
 138  */
 139
 140 #define CE_CONT         0       /* continuation         */
 141 #define CE_NOTE         1       /* notice               */
 142 #define CE_WARN         2       /* warning              */
 143 #define CE_PANIC        3       /* panic                */
 144 #define CE_IGNORE       4       /* print nothing        */
 145
 146 /*
 147  * ZFS debugging
 148  */
 149
 150 extern void dprintf_setup(int *argc, char **argv);
 151
 152 extern void cmn_err(int, const char *, ...);
 153 extern void vcmn_err(int, const char *, va_list);
 154 extern void panic(const char *, ...);
 155 extern void vpanic(const char *, va_list);
 156
 157 #define fm_panic        panic
 158
 159 extern int aok;
 160
 161 /*
 162  * DTrace SDT probes have different signatures in userland than they do in
 163  * kernel.  If they're being used in kernel code, re-define them out of
 164  * existence for their counterparts in libzpool.
 165  */
 166
 167 #ifdef DTRACE_PROBE
 168 #undef  DTRACE_PROBE
 169 #endif  /* DTRACE_PROBE */
 170 #define DTRACE_PROBE(a) \
 171         ZFS_PROBE0(#a)
 172
 173 #ifdef DTRACE_PROBE1
 174 #undef  DTRACE_PROBE1
 175 #endif  /* DTRACE_PROBE1 */
 176 #define DTRACE_PROBE1(a, b, c) \
 177         ZFS_PROBE1(#a, (unsigned long)c)
 178
 179 #ifdef DTRACE_PROBE2
 180 #undef  DTRACE_PROBE2
 181 #endif  /* DTRACE_PROBE2 */
 182 #define DTRACE_PROBE2(a, b, c, d, e) \
 183         ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
 184
 185 #ifdef DTRACE_PROBE3
 186 #undef  DTRACE_PROBE3
 187 #endif  /* DTRACE_PROBE3 */
 188 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
 189         ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
 190
 191 #ifdef DTRACE_PROBE4
 192 #undef  DTRACE_PROBE4
 193 #endif  /* DTRACE_PROBE4 */
 194 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
 195         ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
 196         (unsigned long)i)
 197
 198 /*
 199  * We use the comma operator so that this macro can be used without much
 200  * additional code.  For example, "return (EINVAL);" becomes
 201  * "return (SET_ERROR(EINVAL));".  Note that the argument will be evaluated
 202  * twice, so it should not have side effects (e.g. something like:
 203  * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
 204  */
 205 #define SET_ERROR(err) (ZFS_SET_ERROR(err), err)
 206
 207 /*
 208  * Threads.  TS_STACK_MIN is dictated by the minimum allowed pthread stack
 209  * size.  While TS_STACK_MAX is somewhat arbitrary, it was selected to be
 210  * large enough for the expected stack depth while small enough to avoid
 211  * exhausting address space with high thread counts.
 212  */
 213 #define TS_MAGIC                0x72f158ab4261e538ull
 214 #define TS_RUN                  0x00000002
 215 #define TS_STACK_MIN            PTHREAD_STACK_MIN
 216 #define TS_STACK_MAX            (256 * 1024)
 217
 218 /* in libzpool, p0 exists only to have its address taken */
 219 typedef struct proc {
 220         uintptr_t       this_is_never_used_dont_dereference_it;
 221 } proc_t;
 222
 223 extern struct proc p0;
 224 #define curproc         (&p0)
 225
 226 typedef void (*thread_func_t)(void *);
 227 typedef void (*thread_func_arg_t)(void *);
 228 typedef pthread_t kt_did_t;
 229
 230 #define kpreempt(x)     ((void)0)
 231
 232 typedef struct kthread {
 233         kt_did_t        t_tid;
 234         thread_func_t   t_func;
 235         void *          t_arg;
 236 } kthread_t;
 237
 238 #define curthread                       zk_thread_current()
 239 #define getcomm()                       "unknown"
 240 #define thread_exit                     zk_thread_exit
 241 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 242         zk_thread_create(stk, stksize, (thread_func_t)func, arg,        \
 243             len, NULL, state, pri, PTHREAD_CREATE_DETACHED)
 244 #define thread_join(t)                  zk_thread_join(t)
 245 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 246
 247 extern kthread_t *zk_thread_current(void);
 248 extern void zk_thread_exit(void);
 249 extern kthread_t *zk_thread_create(caddr_t stk, size_t  stksize,
 250         thread_func_t func, void *arg, size_t len,
 251         proc_t *pp, int state, pri_t pri, int detachstate);
 252 extern void zk_thread_join(kt_did_t tid);
 253
 254 #define kpreempt_disable()      ((void)0)
 255 #define kpreempt_enable()       ((void)0)
 256
 257 #define PS_NONE         -1
 258
 259 #define issig(why)      (FALSE)
 260 #define ISSIG(thr, why) (FALSE)
 261
 262 /*
 263  * Mutexes
 264  */
 265 #define MTX_MAGIC       0x9522f51362a6e326ull
 266 #define MTX_INIT        ((void *)NULL)
 267 #define MTX_DEST        ((void *)-1UL)
 268
 269 typedef struct kmutex {
 270         void            *m_owner;
 271         uint64_t        m_magic;
 272         pthread_mutex_t m_lock;
 273 } kmutex_t;
 274
 275 #define MUTEX_DEFAULT   0
 276 #define MUTEX_HELD(m)   ((m)->m_owner == curthread)
 277 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 278
 279 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 280 extern void mutex_destroy(kmutex_t *mp);
 281 extern void mutex_enter(kmutex_t *mp);
 282 extern void mutex_exit(kmutex_t *mp);
 283 extern int mutex_tryenter(kmutex_t *mp);
 284 extern void *mutex_owner(kmutex_t *mp);
 285 extern int mutex_held(kmutex_t *mp);
 286
 287 /*
 288  * RW locks
 289  */
 290 #define RW_MAGIC        0x4d31fb123648e78aull
 291 #define RW_INIT         ((void *)NULL)
 292 #define RW_DEST         ((void *)-1UL)
 293
 294 typedef struct krwlock {
 295         void                    *rw_owner;
 296         void                    *rw_wr_owner;
 297         uint64_t                rw_magic;
 298         pthread_rwlock_t        rw_lock;
 299         uint_t                  rw_readers;
 300 } krwlock_t;
 301
 302 typedef int krw_t;
 303
 304 #define RW_READER       0
 305 #define RW_WRITER       1
 306 #define RW_DEFAULT      RW_READER
 307
 308 #define RW_READ_HELD(x)         ((x)->rw_readers > 0)
 309 #define RW_WRITE_HELD(x)        ((x)->rw_wr_owner == curthread)
 310 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 311
 312 #undef RW_LOCK_HELD
 313 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 314
 315 #undef RW_LOCK_HELD
 316 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 317
 318 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 319 extern void rw_destroy(krwlock_t *rwlp);
 320 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 321 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 322 extern int rw_tryupgrade(krwlock_t *rwlp);
 323 extern void rw_exit(krwlock_t *rwlp);
 324 #define rw_downgrade(rwlp) do { } while (0)
 325
 326 extern uid_t crgetuid(cred_t *cr);
 327 extern uid_t crgetruid(cred_t *cr);
 328 extern gid_t crgetgid(cred_t *cr);
 329 extern int crgetngroups(cred_t *cr);
 330 extern gid_t *crgetgroups(cred_t *cr);
 331
 332 /*
 333  * Condition variables
 334  */
 335 #define CV_MAGIC        0xd31ea9a83b1b30c4ull
 336
 337 typedef struct kcondvar {
 338         uint64_t                cv_magic;
 339         pthread_cond_t          cv;
 340 } kcondvar_t;
 341
 342 #define CV_DEFAULT      0
 343
 344 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 345 extern void cv_destroy(kcondvar_t *cv);
 346 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 347 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 348 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
 349     hrtime_t res, int flag);
 350 extern void cv_signal(kcondvar_t *cv);
 351 extern void cv_broadcast(kcondvar_t *cv);
 352 #define cv_timedwait_sig(cv, mp, at)            cv_timedwait(cv, mp, at)
 353 #define cv_wait_sig(cv, mp)                     cv_wait(cv, mp)
 354 #define cv_wait_io(cv, mp)                      cv_wait(cv, mp)
 355
 356 /*
 357  * Thread-specific data
 358  */
 359 #define tsd_get(k) pthread_getspecific(k)
 360 #define tsd_set(k, v) pthread_setspecific(k, v)
 361 #define tsd_create(kp, d) pthread_key_create(kp, d)
 362 #define tsd_destroy(kp) /* nothing */
 363
 364 /*
 365  * Thread-specific data
 366  */
 367 #define tsd_get(k) pthread_getspecific(k)
 368 #define tsd_set(k, v) pthread_setspecific(k, v)
 369 #define tsd_create(kp, d) pthread_key_create(kp, d)
 370 #define tsd_destroy(kp) /* nothing */
 371
 372 /*
 373  * kstat creation, installation and deletion
 374  */
 375 extern kstat_t *kstat_create(const char *, int,
 376     const char *, const char *, uchar_t, ulong_t, uchar_t);
 377 extern void kstat_install(kstat_t *);
 378 extern void kstat_delete(kstat_t *);
 379 extern void kstat_waitq_enter(kstat_io_t *);
 380 extern void kstat_waitq_exit(kstat_io_t *);
 381 extern void kstat_runq_enter(kstat_io_t *);
 382 extern void kstat_runq_exit(kstat_io_t *);
 383 extern void kstat_waitq_to_runq(kstat_io_t *);
 384 extern void kstat_runq_back_to_waitq(kstat_io_t *);
 385 extern void kstat_set_raw_ops(kstat_t *ksp,
 386     int (*headers)(char *buf, size_t size),
 387     int (*data)(char *buf, size_t size, void *data),
 388     void *(*addr)(kstat_t *ksp, loff_t index));
 389
 390 /*
 391  * Kernel memory
 392  */
 393 #define KM_SLEEP                UMEM_NOFAIL
 394 #define KM_PUSHPAGE             KM_SLEEP
 395 #define KM_NOSLEEP              UMEM_DEFAULT
 396 #define KMC_NODEBUG             UMC_NODEBUG
 397 #define KMC_KMEM                0x0
 398 #define KMC_VMEM                0x0
 399 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 400 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 401 #define kmem_free(_b, _s)       umem_free(_b, _s)
 402 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 403 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 404 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 405 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 406         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 407 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 408 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 409 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 410 #define kmem_debugging()        0
 411 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c);
 412 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 413 #define POINTER_INVALIDATE(_pp)         /* nothing */
 414 #define POINTER_IS_VALID(_p)    0
 415
 416 typedef umem_cache_t kmem_cache_t;
 417
 418 typedef enum kmem_cbrc {
 419         KMEM_CBRC_YES,
 420         KMEM_CBRC_NO,
 421         KMEM_CBRC_LATER,
 422         KMEM_CBRC_DONT_NEED,
 423         KMEM_CBRC_DONT_KNOW
 424 } kmem_cbrc_t;
 425
 426 /*
 427  * Task queues
 428  */
 429 typedef struct taskq taskq_t;
 430 typedef uintptr_t taskqid_t;
 431 typedef void (task_func_t)(void *);
 432
 433 typedef struct taskq_ent {
 434         struct taskq_ent        *tqent_next;
 435         struct taskq_ent        *tqent_prev;
 436         task_func_t             *tqent_func;
 437         void                    *tqent_arg;
 438         uintptr_t               tqent_flags;
 439 } taskq_ent_t;
 440
 441 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 442
 443 #define TASKQ_PREPOPULATE       0x0001
 444 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 445 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 446 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 447 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 448
 449 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 450 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 451 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 452 #define TQ_FRONT        0x08            /* Queue in front */
 453
 454 extern taskq_t *system_taskq;
 455
 456 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 457 #define taskq_create_proc(a, b, c, d, e, p, f) \
 458             (taskq_create(a, b, c, d, e, f))
 459 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 460             (taskq_create(a, b, maxclsyspri, d, e, f))
 461 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 462 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
 463     clock_t);
 464 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 465     taskq_ent_t *);
 466 extern int      taskq_empty_ent(taskq_ent_t *);
 467 extern void     taskq_init_ent(taskq_ent_t *);
 468 extern void     taskq_destroy(taskq_t *);
 469 extern void     taskq_wait(taskq_t *);
 470 extern void     taskq_wait_id(taskq_t *, taskqid_t);
 471 extern void     taskq_wait_outstanding(taskq_t *, taskqid_t);
 472 extern int      taskq_member(taskq_t *, kthread_t *);
 473 extern int      taskq_cancel_id(taskq_t *, taskqid_t);
 474 extern void     system_taskq_init(void);
 475 extern void     system_taskq_fini(void);
 476
 477 #define XVA_MAPSIZE     3
 478 #define XVA_MAGIC       0x78766174
 479
 480 /*
 481  * vnodes
 482  */
 483 typedef struct vnode {
 484         uint64_t        v_size;
 485         int             v_fd;
 486         char            *v_path;
 487 } vnode_t;
 488
 489 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 490
 491 typedef struct xoptattr {
 492         timestruc_t     xoa_createtime; /* Create time of file */
 493         uint8_t         xoa_archive;
 494         uint8_t         xoa_system;
 495         uint8_t         xoa_readonly;
 496         uint8_t         xoa_hidden;
 497         uint8_t         xoa_nounlink;
 498         uint8_t         xoa_immutable;
 499         uint8_t         xoa_appendonly;
 500         uint8_t         xoa_nodump;
 501         uint8_t         xoa_settable;
 502         uint8_t         xoa_opaque;
 503         uint8_t         xoa_av_quarantined;
 504         uint8_t         xoa_av_modified;
 505         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 506         uint8_t         xoa_reparse;
 507         uint8_t         xoa_offline;
 508         uint8_t         xoa_sparse;
 509 } xoptattr_t;
 510
 511 typedef struct vattr {
 512         uint_t          va_mask;        /* bit-mask of attributes */
 513         u_offset_t      va_size;        /* file size in bytes */
 514 } vattr_t;
 515
 516
 517 typedef struct xvattr {
 518         vattr_t         xva_vattr;      /* Embedded vattr structure */
 519         uint32_t        xva_magic;      /* Magic Number */
 520         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 521         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 522         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 523         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 524         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 525 } xvattr_t;
 526
 527 typedef struct vsecattr {
 528         uint_t          vsa_mask;       /* See below */
 529         int             vsa_aclcnt;     /* ACL entry count */
 530         void            *vsa_aclentp;   /* pointer to ACL entries */
 531         int             vsa_dfaclcnt;   /* default ACL entry count */
 532         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 533         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 534 } vsecattr_t;
 535
 536 #define AT_TYPE         0x00001
 537 #define AT_MODE         0x00002
 538 #define AT_UID          0x00004
 539 #define AT_GID          0x00008
 540 #define AT_FSID         0x00010
 541 #define AT_NODEID       0x00020
 542 #define AT_NLINK        0x00040
 543 #define AT_SIZE         0x00080
 544 #define AT_ATIME        0x00100
 545 #define AT_MTIME        0x00200
 546 #define AT_CTIME        0x00400
 547 #define AT_RDEV         0x00800
 548 #define AT_BLKSIZE      0x01000
 549 #define AT_NBLOCKS      0x02000
 550 #define AT_SEQ          0x08000
 551 #define AT_XVATTR       0x10000
 552
 553 #define CRCREAT         0
 554
 555 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 556
 557 #define VOP_CLOSE(vp, f, c, o, cr, ct)  vn_close(vp)
 558 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 559 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 560
 561 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 562
 563 #define VN_RELE(vp)     vn_close(vp)
 564
 565 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 566     int x2, int x3);
 567 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 568     int x2, int x3, vnode_t *vp, int fd);
 569 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 570     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 571 extern void vn_close(vnode_t *vp);
 572
 573 #define vn_remove(path, x1, x2)         remove(path)
 574 #define vn_rename(from, to, seg)        rename((from), (to))
 575 #define vn_is_readonly(vp)              B_FALSE
 576
 577 extern vnode_t *rootdir;
 578
 579 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 580
 581 /*
 582  * Random stuff
 583  */
 584 #define ddi_get_lbolt()         (gethrtime() >> 23)
 585 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 586 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 587
 588 #define ddi_time_before(a, b)           (a < b)
 589 #define ddi_time_after(a, b)            ddi_time_before(b, a)
 590 #define ddi_time_before_eq(a, b)        (!ddi_time_after(a, b))
 591 #define ddi_time_after_eq(a, b)         ddi_time_before_eq(b, a)
 592
 593 #define ddi_time_before64(a, b)         (a < b)
 594 #define ddi_time_after64(a, b)          ddi_time_before64(b, a)
 595 #define ddi_time_before_eq64(a, b)      (!ddi_time_after64(a, b))
 596 #define ddi_time_after_eq64(a, b)       ddi_time_before_eq64(b, a)
 597
 598 extern void delay(clock_t ticks);
 599
 600 #define SEC_TO_TICK(sec)        ((sec) * hz)
 601 #define MSEC_TO_TICK(msec)      ((msec) / (MILLISEC / hz))
 602 #define USEC_TO_TICK(usec)      ((usec) / (MICROSEC / hz))
 603 #define NSEC_TO_TICK(usec)      ((usec) / (NANOSEC / hz))
 604
 605 #define gethrestime_sec() time(NULL)
 606 #define gethrestime(t) \
 607         do {\
 608                 (t)->tv_sec = gethrestime_sec();\
 609                 (t)->tv_nsec = 0;\
 610         } while (0);
 611
 612 #define max_ncpus       64
 613 #define num_online_cpus() (sysconf(_SC_NPROCESSORS_ONLN))
 614
 615 #define minclsyspri     60
 616 #define maxclsyspri     99
 617
 618 #define CPU_SEQID       (pthread_self() & (max_ncpus - 1))
 619
 620 #define kcred           NULL
 621 #define CRED()          NULL
 622
 623 #define ptob(x)         ((x) * PAGESIZE)
 624
 625 extern uint64_t physmem;
 626
 627 extern int highbit64(uint64_t i);
 628 extern int random_get_bytes(uint8_t *ptr, size_t len);
 629 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 630
 631 extern void kernel_init(int);
 632 extern void kernel_fini(void);
 633
 634 struct spa;
 635 extern void nicenum(uint64_t num, char *buf);
 636 extern void show_pool_stats(struct spa *);
 637
 638 typedef struct callb_cpr {
 639         kmutex_t        *cc_lockp;
 640 } callb_cpr_t;
 641
 642 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 643         (cp)->cc_lockp = lockp;                                 \
 644 }
 645
 646 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 647         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 648 }
 649
 650 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 651         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 652 }
 653
 654 #define CALLB_CPR_EXIT(cp) {                                    \
 655         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 656         mutex_exit((cp)->cc_lockp);                             \
 657 }
 658
 659 #define zone_dataset_visible(x, y)      (1)
 660 #define INGLOBALZONE(z)                 (1)
 661
 662 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 663 extern char *kmem_asprintf(const char *fmt, ...);
 664 #define strfree(str) kmem_free((str), strlen(str) + 1)
 665
 666 /*
 667  * Hostname information
 668  */
 669 extern char hw_serial[];        /* for userland-emulated hostid access */
 670 extern int ddi_strtoul(const char *str, char **nptr, int base,
 671     unsigned long *result);
 672
 673 extern int ddi_strtoull(const char *str, char **nptr, int base,
 674     u_longlong_t *result);
 675
 676 typedef struct utsname  utsname_t;
 677 extern utsname_t *utsname(void);
 678
 679 /* ZFS Boot Related stuff. */
 680
 681 struct _buf {
 682         intptr_t        _fd;
 683 };
 684
 685 struct bootstat {
 686         uint64_t st_size;
 687 };
 688
 689 typedef struct ace_object {
 690         uid_t           a_who;
 691         uint32_t        a_access_mask;
 692         uint16_t        a_flags;
 693         uint16_t        a_type;
 694         uint8_t         a_obj_type[16];
 695         uint8_t         a_inherit_obj_type[16];
 696 } ace_object_t;
 697
 698
 699 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 700 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 701 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 702 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 703
 704 extern struct _buf *kobj_open_file(char *name);
 705 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 706     unsigned off);
 707 extern void kobj_close_file(struct _buf *file);
 708 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 709 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 710 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 711     cred_t *cr);
 712 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 713 extern zoneid_t getzoneid(void);
 714
 715 /* SID stuff */
 716 typedef struct ksiddomain {
 717         uint_t  kd_ref;
 718         uint_t  kd_len;
 719         char    *kd_name;
 720 } ksiddomain_t;
 721
 722 ksiddomain_t *ksid_lookupdomain(const char *);
 723 void ksiddomain_rele(ksiddomain_t *);
 724
 725 #define DDI_SLEEP       KM_SLEEP
 726 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 727         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 728
 729 #define zfs_sleep_until(wakeup)                                         \
 730         do {                                                            \
 731                 hrtime_t delta = wakeup - gethrtime();                  \
 732                 struct timespec ts;                                     \
 733                 ts.tv_sec = delta / NANOSEC;                            \
 734                 ts.tv_nsec = delta % NANOSEC;                           \
 735                 (void) nanosleep(&ts, NULL);                            \
 736         } while (0)
 737
 738 typedef int fstrans_cookie_t;
 739
 740 extern fstrans_cookie_t spl_fstrans_mark(void);
 741 extern void spl_fstrans_unmark(fstrans_cookie_t);
 742 extern int spl_fstrans_check(void);
 743
 744 #endif /* _KERNEL */
 745 #endif  /* _SYS_ZFS_CONTEXT_H */