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  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24  * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
  25  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  26  */
  27
  28 #ifndef _SYS_ZFS_CONTEXT_H
  29 #define _SYS_ZFS_CONTEXT_H
  30
  31 #ifdef __KERNEL__
  32
  33 #include <sys/note.h>
  34 #include <sys/types.h>
  35 #include <sys/t_lock.h>
  36 #include <sys/atomic.h>
  37 #include <sys/sysmacros.h>
  38 #include <sys/bitmap.h>
  39 #include <sys/cmn_err.h>
  40 #include <sys/kmem.h>
  41 #include <sys/kmem_cache.h>
  42 #include <sys/vmem.h>
  43 #include <sys/taskq.h>
  44 #include <sys/buf.h>
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/cpuvar.h>
  48 #include <sys/kobj.h>
  49 #include <sys/conf.h>
  50 #include <sys/disp.h>
  51 #include <sys/debug.h>
  52 #include <sys/random.h>
  53 #include <sys/byteorder.h>
  54 #include <sys/systm.h>
  55 #include <sys/list.h>
  56 #include <sys/uio_impl.h>
  57 #include <sys/dirent.h>
  58 #include <sys/time.h>
  59 #include <vm/seg_kmem.h>
  60 #include <sys/zone.h>
  61 #include <sys/sdt.h>
  62 #include <sys/kstat.h>
  63 #include <sys/zfs_debug.h>
  64 #include <sys/sysevent.h>
  65 #include <sys/sysevent/eventdefs.h>
  66 #include <sys/zfs_delay.h>
  67 #include <sys/sunddi.h>
  68 #include <sys/ctype.h>
  69 #include <sys/disp.h>
  70 #include <sys/trace.h>
  71 #include <linux/dcache_compat.h>
  72 #include <linux/utsname_compat.h>
  73
  74 #else /* _KERNEL */
  75
  76 #define _SYS_MUTEX_H
  77 #define _SYS_RWLOCK_H
  78 #define _SYS_CONDVAR_H
  79 #define _SYS_SYSTM_H
  80 #define _SYS_T_LOCK_H
  81 #define _SYS_VNODE_H
  82 #define _SYS_VFS_H
  83 #define _SYS_SUNDDI_H
  84 #define _SYS_CALLB_H
  85
  86 #include <stdio.h>
  87 #include <stdlib.h>
  88 #include <stddef.h>
  89 #include <stdarg.h>
  90 #include <fcntl.h>
  91 #include <unistd.h>
  92 #include <errno.h>
  93 #include <string.h>
  94 #include <strings.h>
  95 #include <pthread.h>
  96 #include <synch.h>
  97 #include <assert.h>
  98 #include <alloca.h>
  99 #include <umem.h>
 100 #include <limits.h>
 101 #include <atomic.h>
 102 #include <dirent.h>
 103 #include <time.h>
 104 #include <ctype.h>
 105 #include <signal.h>
 106 #include <sys/mman.h>
 107 #include <sys/note.h>
 108 #include <sys/types.h>
 109 #include <sys/cred.h>
 110 #include <sys/sysmacros.h>
 111 #include <sys/bitmap.h>
 112 #include <sys/resource.h>
 113 #include <sys/byteorder.h>
 114 #include <sys/list.h>
 115 #include <sys/uio.h>
 116 #include <sys/zfs_debug.h>
 117 #include <sys/sdt.h>
 118 #include <sys/kstat.h>
 119 #include <sys/u8_textprep.h>
 120 #include <sys/sysevent.h>
 121 #include <sys/sysevent/eventdefs.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 #define likely(x)       __builtin_expect((x), 1)
 132
 133 /*
 134  * Debugging
 135  */
 136
 137 /*
 138  * Note that we are not using the debugging levels.
 139  */
 140
 141 #define CE_CONT         0       /* continuation         */
 142 #define CE_NOTE         1       /* notice               */
 143 #define CE_WARN         2       /* warning              */
 144 #define CE_PANIC        3       /* panic                */
 145 #define CE_IGNORE       4       /* print nothing        */
 146
 147 /*
 148  * ZFS debugging
 149  */
 150
 151 extern void dprintf_setup(int *argc, char **argv);
 152
 153 extern void cmn_err(int, const char *, ...);
 154 extern void vcmn_err(int, const char *, va_list);
 155 extern void panic(const char *, ...);
 156 extern void vpanic(const char *, va_list);
 157
 158 #define fm_panic        panic
 159
 160 extern int aok;
 161
 162 /*
 163  * DTrace SDT probes have different signatures in userland than they do in
 164  * the kernel.  If they're being used in kernel code, re-define them out of
 165  * existence for their counterparts in libzpool.
 166  *
 167  * Here's an example of how to use the set-error probes in userland:
 168  * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
 169  *
 170  * Here's an example of how to use DTRACE_PROBE probes in userland:
 171  * If there is a probe declared as follows:
 172  * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
 173  * Then you can use it as follows:
 174  * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
 175  *     {printf("%u %p\n", arg1, arg2);}
 176  */
 177
 178 #ifdef DTRACE_PROBE
 179 #undef  DTRACE_PROBE
 180 #endif  /* DTRACE_PROBE */
 181 #define DTRACE_PROBE(a) \
 182         ZFS_PROBE0(#a)
 183
 184 #ifdef DTRACE_PROBE1
 185 #undef  DTRACE_PROBE1
 186 #endif  /* DTRACE_PROBE1 */
 187 #define DTRACE_PROBE1(a, b, c) \
 188         ZFS_PROBE1(#a, (unsigned long)c)
 189
 190 #ifdef DTRACE_PROBE2
 191 #undef  DTRACE_PROBE2
 192 #endif  /* DTRACE_PROBE2 */
 193 #define DTRACE_PROBE2(a, b, c, d, e) \
 194         ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
 195
 196 #ifdef DTRACE_PROBE3
 197 #undef  DTRACE_PROBE3
 198 #endif  /* DTRACE_PROBE3 */
 199 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
 200         ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
 201
 202 #ifdef DTRACE_PROBE4
 203 #undef  DTRACE_PROBE4
 204 #endif  /* DTRACE_PROBE4 */
 205 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
 206         ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
 207         (unsigned long)i)
 208
 209 /*
 210  * Threads.  TS_STACK_MIN is dictated by the minimum allowed pthread stack
 211  * size.  While TS_STACK_MAX is somewhat arbitrary, it was selected to be
 212  * large enough for the expected stack depth while small enough to avoid
 213  * exhausting address space with high thread counts.
 214  */
 215 #define TS_MAGIC                0x72f158ab4261e538ull
 216 #define TS_RUN                  0x00000002
 217 #define TS_STACK_MIN            MAX(PTHREAD_STACK_MIN, 32768)
 218 #define TS_STACK_MAX            (256 * 1024)
 219
 220 /* in libzpool, p0 exists only to have its address taken */
 221 typedef struct proc {
 222         uintptr_t       this_is_never_used_dont_dereference_it;
 223 } proc_t;
 224
 225 extern struct proc p0;
 226 #define curproc         (&p0)
 227
 228 typedef void (*thread_func_t)(void *);
 229 typedef void (*thread_func_arg_t)(void *);
 230 typedef pthread_t kt_did_t;
 231
 232 #define kpreempt(x)     ((void)0)
 233
 234 typedef struct kthread {
 235         kt_did_t        t_tid;
 236         thread_func_t   t_func;
 237         void *          t_arg;
 238         pri_t           t_pri;
 239 } kthread_t;
 240
 241 #define curthread                       zk_thread_current()
 242 #define getcomm()                       "unknown"
 243 #define thread_exit                     zk_thread_exit
 244 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 245         zk_thread_create(stk, stksize, (thread_func_t)func, arg,        \
 246             len, NULL, state, pri, PTHREAD_CREATE_DETACHED)
 247 #define thread_join(t)                  zk_thread_join(t)
 248 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 249
 250 extern kthread_t *zk_thread_current(void);
 251 extern void zk_thread_exit(void);
 252 extern kthread_t *zk_thread_create(caddr_t stk, size_t  stksize,
 253         thread_func_t func, void *arg, uint64_t len,
 254         proc_t *pp, int state, pri_t pri, int detachstate);
 255 extern void zk_thread_join(kt_did_t tid);
 256
 257 #define kpreempt_disable()      ((void)0)
 258 #define kpreempt_enable()       ((void)0)
 259
 260 #define PS_NONE         -1
 261
 262 #define issig(why)      (FALSE)
 263 #define ISSIG(thr, why) (FALSE)
 264
 265 /*
 266  * Mutexes
 267  */
 268 #define MTX_MAGIC       0x9522f51362a6e326ull
 269 #define MTX_INIT        ((void *)NULL)
 270 #define MTX_DEST        ((void *)-1UL)
 271
 272 typedef struct kmutex {
 273         void            *m_owner;
 274         uint64_t        m_magic;
 275         pthread_mutex_t m_lock;
 276 } kmutex_t;
 277
 278 #define MUTEX_DEFAULT   0
 279 #define MUTEX_NOLOCKDEP MUTEX_DEFAULT
 280 #define MUTEX_HELD(m)   ((m)->m_owner == curthread)
 281 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 282
 283 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 284 extern void mutex_destroy(kmutex_t *mp);
 285 extern void mutex_enter(kmutex_t *mp);
 286 extern void mutex_exit(kmutex_t *mp);
 287 extern int mutex_tryenter(kmutex_t *mp);
 288 extern void *mutex_owner(kmutex_t *mp);
 289 extern int mutex_held(kmutex_t *mp);
 290
 291 /*
 292  * RW locks
 293  */
 294 #define RW_MAGIC        0x4d31fb123648e78aull
 295 #define RW_INIT         ((void *)NULL)
 296 #define RW_DEST         ((void *)-1UL)
 297
 298 typedef struct krwlock {
 299         void                    *rw_owner;
 300         void                    *rw_wr_owner;
 301         uint64_t                rw_magic;
 302         pthread_rwlock_t        rw_lock;
 303         uint_t                  rw_readers;
 304 } krwlock_t;
 305
 306 typedef int krw_t;
 307
 308 #define RW_READER       0
 309 #define RW_WRITER       1
 310 #define RW_DEFAULT      RW_READER
 311 #define RW_NOLOCKDEP    RW_READER
 312
 313 #define RW_READ_HELD(x)         ((x)->rw_readers > 0)
 314 #define RW_WRITE_HELD(x)        ((x)->rw_wr_owner == curthread)
 315 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 316
 317 #undef RW_LOCK_HELD
 318 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 319
 320 #undef RW_LOCK_HELD
 321 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 322
 323 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 324 extern void rw_destroy(krwlock_t *rwlp);
 325 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 326 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 327 extern int rw_tryupgrade(krwlock_t *rwlp);
 328 extern void rw_exit(krwlock_t *rwlp);
 329 #define rw_downgrade(rwlp) do { } while (0)
 330
 331 extern uid_t crgetuid(cred_t *cr);
 332 extern uid_t crgetruid(cred_t *cr);
 333 extern gid_t crgetgid(cred_t *cr);
 334 extern int crgetngroups(cred_t *cr);
 335 extern gid_t *crgetgroups(cred_t *cr);
 336
 337 /*
 338  * Condition variables
 339  */
 340 #define CV_MAGIC        0xd31ea9a83b1b30c4ull
 341
 342 typedef struct kcondvar {
 343         uint64_t                cv_magic;
 344         pthread_cond_t          cv;
 345 } kcondvar_t;
 346
 347 #define CV_DEFAULT      0
 348 #define CALLOUT_FLAG_ABSOLUTE   0x2
 349
 350 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 351 extern void cv_destroy(kcondvar_t *cv);
 352 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 353 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 354 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
 355     hrtime_t res, int flag);
 356 extern void cv_signal(kcondvar_t *cv);
 357 extern void cv_broadcast(kcondvar_t *cv);
 358 #define cv_timedwait_sig(cv, mp, at)            cv_timedwait(cv, mp, at)
 359 #define cv_wait_sig(cv, mp)                     cv_wait(cv, mp)
 360 #define cv_wait_io(cv, mp)                      cv_wait(cv, mp)
 361 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \
 362         cv_timedwait_hires(cv, mp, t, r, f)
 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  * Thread-specific data
 374  */
 375 #define tsd_get(k) pthread_getspecific(k)
 376 #define tsd_set(k, v) pthread_setspecific(k, v)
 377 #define tsd_create(kp, d) pthread_key_create(kp, d)
 378 #define tsd_destroy(kp) /* nothing */
 379
 380 /*
 381  * kstat creation, installation and deletion
 382  */
 383 extern kstat_t *kstat_create(const char *, int,
 384     const char *, const char *, uchar_t, ulong_t, uchar_t);
 385 extern void kstat_named_init(kstat_named_t *, const char *, uchar_t);
 386 extern void kstat_install(kstat_t *);
 387 extern void kstat_delete(kstat_t *);
 388 extern void kstat_waitq_enter(kstat_io_t *);
 389 extern void kstat_waitq_exit(kstat_io_t *);
 390 extern void kstat_runq_enter(kstat_io_t *);
 391 extern void kstat_runq_exit(kstat_io_t *);
 392 extern void kstat_waitq_to_runq(kstat_io_t *);
 393 extern void kstat_runq_back_to_waitq(kstat_io_t *);
 394 extern void kstat_set_raw_ops(kstat_t *ksp,
 395     int (*headers)(char *buf, size_t size),
 396     int (*data)(char *buf, size_t size, void *data),
 397     void *(*addr)(kstat_t *ksp, loff_t index));
 398
 399 /*
 400  * Kernel memory
 401  */
 402 #define KM_SLEEP                UMEM_NOFAIL
 403 #define KM_PUSHPAGE             KM_SLEEP
 404 #define KM_NOSLEEP              UMEM_DEFAULT
 405 #define KMC_NODEBUG             UMC_NODEBUG
 406 #define KMC_KMEM                0x0
 407 #define KMC_VMEM                0x0
 408 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 409 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 410 #define kmem_free(_b, _s)       umem_free(_b, _s)
 411 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 412 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 413 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 414 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 415         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 416 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 417 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 418 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 419 #define kmem_debugging()        0
 420 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c);
 421 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 422 #define vmem_qcache_reap(_v)            /* nothing */
 423 #define POINTER_INVALIDATE(_pp)         /* nothing */
 424 #define POINTER_IS_VALID(_p)    0
 425
 426 extern vmem_t *zio_arena;
 427
 428 typedef umem_cache_t kmem_cache_t;
 429
 430 typedef enum kmem_cbrc {
 431         KMEM_CBRC_YES,
 432         KMEM_CBRC_NO,
 433         KMEM_CBRC_LATER,
 434         KMEM_CBRC_DONT_NEED,
 435         KMEM_CBRC_DONT_KNOW
 436 } kmem_cbrc_t;
 437
 438 /*
 439  * Task queues
 440  */
 441
 442 #define TASKQ_NAMELEN   31
 443
 444 typedef uintptr_t taskqid_t;
 445 typedef void (task_func_t)(void *);
 446
 447 typedef struct taskq_ent {
 448         struct taskq_ent        *tqent_next;
 449         struct taskq_ent        *tqent_prev;
 450         task_func_t             *tqent_func;
 451         void                    *tqent_arg;
 452         uintptr_t               tqent_flags;
 453 } taskq_ent_t;
 454
 455 typedef struct taskq {
 456         char            tq_name[TASKQ_NAMELEN + 1];
 457         kmutex_t        tq_lock;
 458         krwlock_t       tq_threadlock;
 459         kcondvar_t      tq_dispatch_cv;
 460         kcondvar_t      tq_wait_cv;
 461         kthread_t       **tq_threadlist;
 462         int             tq_flags;
 463         int             tq_active;
 464         int             tq_nthreads;
 465         int             tq_nalloc;
 466         int             tq_minalloc;
 467         int             tq_maxalloc;
 468         kcondvar_t      tq_maxalloc_cv;
 469         int             tq_maxalloc_wait;
 470         taskq_ent_t     *tq_freelist;
 471         taskq_ent_t     tq_task;
 472 } taskq_t;
 473
 474 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 475
 476 #define TASKQ_PREPOPULATE       0x0001
 477 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 478 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 479 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 480 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 481
 482 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 483 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 484 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 485 #define TQ_FRONT        0x08            /* Queue in front */
 486
 487 #define TASKQID_INVALID         ((taskqid_t)0)
 488
 489 extern taskq_t *system_taskq;
 490 extern taskq_t *system_delay_taskq;
 491
 492 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 493 #define taskq_create_proc(a, b, c, d, e, p, f) \
 494             (taskq_create(a, b, c, d, e, f))
 495 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 496             (taskq_create(a, b, maxclsyspri, d, e, f))
 497 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 498 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
 499     clock_t);
 500 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 501     taskq_ent_t *);
 502 extern int      taskq_empty_ent(taskq_ent_t *);
 503 extern void     taskq_init_ent(taskq_ent_t *);
 504 extern void     taskq_destroy(taskq_t *);
 505 extern void     taskq_wait(taskq_t *);
 506 extern void     taskq_wait_id(taskq_t *, taskqid_t);
 507 extern void     taskq_wait_outstanding(taskq_t *, taskqid_t);
 508 extern int      taskq_member(taskq_t *, kthread_t *);
 509 extern int      taskq_cancel_id(taskq_t *, taskqid_t);
 510 extern void     system_taskq_init(void);
 511 extern void     system_taskq_fini(void);
 512
 513 #define XVA_MAPSIZE     3
 514 #define XVA_MAGIC       0x78766174
 515
 516 /*
 517  * vnodes
 518  */
 519 typedef struct vnode {
 520         uint64_t        v_size;
 521         int             v_fd;
 522         char            *v_path;
 523         int             v_dump_fd;
 524 } vnode_t;
 525
 526 extern char *vn_dumpdir;
 527 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 528
 529 typedef struct xoptattr {
 530         timestruc_t     xoa_createtime; /* Create time of file */
 531         uint8_t         xoa_archive;
 532         uint8_t         xoa_system;
 533         uint8_t         xoa_readonly;
 534         uint8_t         xoa_hidden;
 535         uint8_t         xoa_nounlink;
 536         uint8_t         xoa_immutable;
 537         uint8_t         xoa_appendonly;
 538         uint8_t         xoa_nodump;
 539         uint8_t         xoa_settable;
 540         uint8_t         xoa_opaque;
 541         uint8_t         xoa_av_quarantined;
 542         uint8_t         xoa_av_modified;
 543         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 544         uint8_t         xoa_reparse;
 545         uint8_t         xoa_offline;
 546         uint8_t         xoa_sparse;
 547 } xoptattr_t;
 548
 549 typedef struct vattr {
 550         uint_t          va_mask;        /* bit-mask of attributes */
 551         u_offset_t      va_size;        /* file size in bytes */
 552 } vattr_t;
 553
 554
 555 typedef struct xvattr {
 556         vattr_t         xva_vattr;      /* Embedded vattr structure */
 557         uint32_t        xva_magic;      /* Magic Number */
 558         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 559         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 560         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 561         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 562         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 563 } xvattr_t;
 564
 565 typedef struct vsecattr {
 566         uint_t          vsa_mask;       /* See below */
 567         int             vsa_aclcnt;     /* ACL entry count */
 568         void            *vsa_aclentp;   /* pointer to ACL entries */
 569         int             vsa_dfaclcnt;   /* default ACL entry count */
 570         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 571         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 572 } vsecattr_t;
 573
 574 #define AT_TYPE         0x00001
 575 #define AT_MODE         0x00002
 576 #define AT_UID          0x00004
 577 #define AT_GID          0x00008
 578 #define AT_FSID         0x00010
 579 #define AT_NODEID       0x00020
 580 #define AT_NLINK        0x00040
 581 #define AT_SIZE         0x00080
 582 #define AT_ATIME        0x00100
 583 #define AT_MTIME        0x00200
 584 #define AT_CTIME        0x00400
 585 #define AT_RDEV         0x00800
 586 #define AT_BLKSIZE      0x01000
 587 #define AT_NBLOCKS      0x02000
 588 #define AT_SEQ          0x08000
 589 #define AT_XVATTR       0x10000
 590
 591 #define CRCREAT         0
 592
 593 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 594
 595 #define VOP_CLOSE(vp, f, c, o, cr, ct)  vn_close(vp)
 596 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 597 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 598
 599 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 600
 601 #define VN_RELE(vp)     vn_close(vp)
 602
 603 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 604     int x2, int x3);
 605 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 606     int x2, int x3, vnode_t *vp, int fd);
 607 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 608     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 609 extern void vn_close(vnode_t *vp);
 610
 611 #define vn_remove(path, x1, x2)         remove(path)
 612 #define vn_rename(from, to, seg)        rename((from), (to))
 613 #define vn_is_readonly(vp)              B_FALSE
 614
 615 extern vnode_t *rootdir;
 616
 617 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 618
 619 /*
 620  * Random stuff
 621  */
 622 #define ddi_get_lbolt()         (gethrtime() >> 23)
 623 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 624 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 625
 626 #define ddi_time_before(a, b)           (a < b)
 627 #define ddi_time_after(a, b)            ddi_time_before(b, a)
 628 #define ddi_time_before_eq(a, b)        (!ddi_time_after(a, b))
 629 #define ddi_time_after_eq(a, b)         ddi_time_before_eq(b, a)
 630
 631 #define ddi_time_before64(a, b)         (a < b)
 632 #define ddi_time_after64(a, b)          ddi_time_before64(b, a)
 633 #define ddi_time_before_eq64(a, b)      (!ddi_time_after64(a, b))
 634 #define ddi_time_after_eq64(a, b)       ddi_time_before_eq64(b, a)
 635
 636 extern void delay(clock_t ticks);
 637
 638 #define SEC_TO_TICK(sec)        ((sec) * hz)
 639 #define MSEC_TO_TICK(msec)      ((msec) / (MILLISEC / hz))
 640 #define USEC_TO_TICK(usec)      ((usec) / (MICROSEC / hz))
 641 #define NSEC_TO_TICK(usec)      ((usec) / (NANOSEC / hz))
 642
 643 #define gethrestime_sec() time(NULL)
 644 #define gethrestime(t) \
 645         do {\
 646                 (t)->tv_sec = gethrestime_sec();\
 647                 (t)->tv_nsec = 0;\
 648         } while (0);
 649
 650 #define max_ncpus       64
 651 #define boot_ncpus      (sysconf(_SC_NPROCESSORS_ONLN))
 652
 653 /*
 654  * Process priorities as defined by setpriority(2) and getpriority(2).
 655  */
 656 #define minclsyspri     19
 657 #define maxclsyspri     -20
 658 #define defclsyspri     0
 659
 660 #define CPU_SEQID       ((uintptr_t)pthread_self() & (max_ncpus - 1))
 661
 662 #define kcred           NULL
 663 #define CRED()          NULL
 664
 665 #define ptob(x)         ((x) * PAGESIZE)
 666
 667 extern uint64_t physmem;
 668
 669 extern int highbit64(uint64_t i);
 670 extern int lowbit64(uint64_t i);
 671 extern int highbit(ulong_t i);
 672 extern int lowbit(ulong_t i);
 673 extern int random_get_bytes(uint8_t *ptr, size_t len);
 674 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 675
 676 extern void kernel_init(int);
 677 extern void kernel_fini(void);
 678 extern void thread_init(void);
 679 extern void thread_fini(void);
 680 extern void random_init(void);
 681 extern void random_fini(void);
 682
 683 struct spa;
 684 extern void nicenum(uint64_t num, char *buf);
 685 extern void show_pool_stats(struct spa *);
 686 extern int set_global_var(char *arg);
 687
 688 typedef struct callb_cpr {
 689         kmutex_t        *cc_lockp;
 690 } callb_cpr_t;
 691
 692 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 693         (cp)->cc_lockp = lockp;                                 \
 694 }
 695
 696 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 697         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 698 }
 699
 700 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 701         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 702 }
 703
 704 #define CALLB_CPR_EXIT(cp) {                                    \
 705         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 706         mutex_exit((cp)->cc_lockp);                             \
 707 }
 708
 709 #define zone_dataset_visible(x, y)      (1)
 710 #define INGLOBALZONE(z)                 (1)
 711
 712 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 713 extern char *kmem_asprintf(const char *fmt, ...);
 714 #define strfree(str) kmem_free((str), strlen(str) + 1)
 715
 716 /*
 717  * Hostname information
 718  */
 719 extern char hw_serial[];        /* for userland-emulated hostid access */
 720 extern int ddi_strtoul(const char *str, char **nptr, int base,
 721     unsigned long *result);
 722
 723 extern int ddi_strtoull(const char *str, char **nptr, int base,
 724     u_longlong_t *result);
 725
 726 typedef struct utsname  utsname_t;
 727 extern utsname_t *utsname(void);
 728
 729 /* ZFS Boot Related stuff. */
 730
 731 struct _buf {
 732         intptr_t        _fd;
 733 };
 734
 735 struct bootstat {
 736         uint64_t st_size;
 737 };
 738
 739 typedef struct ace_object {
 740         uid_t           a_who;
 741         uint32_t        a_access_mask;
 742         uint16_t        a_flags;
 743         uint16_t        a_type;
 744         uint8_t         a_obj_type[16];
 745         uint8_t         a_inherit_obj_type[16];
 746 } ace_object_t;
 747
 748
 749 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 750 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 751 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 752 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 753
 754 extern struct _buf *kobj_open_file(char *name);
 755 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 756     unsigned off);
 757 extern void kobj_close_file(struct _buf *file);
 758 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 759 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 760 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 761     cred_t *cr);
 762 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 763 extern int secpolicy_zfs(const cred_t *cr);
 764 extern zoneid_t getzoneid(void);
 765
 766 /* SID stuff */
 767 typedef struct ksiddomain {
 768         uint_t  kd_ref;
 769         uint_t  kd_len;
 770         char    *kd_name;
 771 } ksiddomain_t;
 772
 773 ksiddomain_t *ksid_lookupdomain(const char *);
 774 void ksiddomain_rele(ksiddomain_t *);
 775
 776 #define DDI_SLEEP       KM_SLEEP
 777 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 778         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 779
 780 #define zfs_sleep_until(wakeup)                                         \
 781         do {                                                            \
 782                 hrtime_t delta = wakeup - gethrtime();                  \
 783                 struct timespec ts;                                     \
 784                 ts.tv_sec = delta / NANOSEC;                            \
 785                 ts.tv_nsec = delta % NANOSEC;                           \
 786                 (void) nanosleep(&ts, NULL);                            \
 787         } while (0)
 788
 789 typedef int fstrans_cookie_t;
 790
 791 extern fstrans_cookie_t spl_fstrans_mark(void);
 792 extern void spl_fstrans_unmark(fstrans_cookie_t);
 793 extern int __spl_pf_fstrans_check(void);
 794
 795 #endif /* _KERNEL */
 796 #endif  /* _SYS_ZFS_CONTEXT_H */