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, 2015 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/kstat.h>
  66 #include <sys/zfs_debug.h>
  67 #include <sys/sysevent.h>
  68 #include <sys/sysevent/eventdefs.h>
  69 #include <sys/zfs_delay.h>
  70 #include <sys/sunddi.h>
  71 #include <sys/ctype.h>
  72 #include <sys/disp.h>
  73 #include <sys/trace.h>
  74 #include <linux/dcache_compat.h>
  75 #include <linux/utsname_compat.h>
  76
  77 #else /* _KERNEL */
  78
  79 #define _SYS_MUTEX_H
  80 #define _SYS_RWLOCK_H
  81 #define _SYS_CONDVAR_H
  82 #define _SYS_SYSTM_H
  83 #define _SYS_T_LOCK_H
  84 #define _SYS_VNODE_H
  85 #define _SYS_VFS_H
  86 #define _SYS_SUNDDI_H
  87 #define _SYS_CALLB_H
  88
  89 #include <stdio.h>
  90 #include <stdlib.h>
  91 #include <stddef.h>
  92 #include <stdarg.h>
  93 #include <fcntl.h>
  94 #include <unistd.h>
  95 #include <errno.h>
  96 #include <string.h>
  97 #include <strings.h>
  98 #include <pthread.h>
  99 #include <synch.h>
 100 #include <assert.h>
 101 #include <alloca.h>
 102 #include <umem.h>
 103 #include <limits.h>
 104 #include <atomic.h>
 105 #include <dirent.h>
 106 #include <time.h>
 107 #include <ctype.h>
 108 #include <signal.h>
 109 #include <sys/mman.h>
 110 #include <sys/note.h>
 111 #include <sys/types.h>
 112 #include <sys/cred.h>
 113 #include <sys/sysmacros.h>
 114 #include <sys/bitmap.h>
 115 #include <sys/resource.h>
 116 #include <sys/byteorder.h>
 117 #include <sys/list.h>
 118 #include <sys/uio.h>
 119 #include <sys/zfs_debug.h>
 120 #include <sys/sdt.h>
 121 #include <sys/kstat.h>
 122 #include <sys/u8_textprep.h>
 123 #include <sys/sysevent.h>
 124 #include <sys/sysevent/eventdefs.h>
 125 #include <sys/sunddi.h>
 126 #include <sys/debug.h>
 127 #include <sys/utsname.h>
 128
 129 /*
 130  * Stack
 131  */
 132
 133 #define noinline        __attribute__((noinline))
 134 #define likely(x)       __builtin_expect((x), 1)
 135
 136 /*
 137  * Debugging
 138  */
 139
 140 /*
 141  * Note that we are not using the debugging levels.
 142  */
 143
 144 #define CE_CONT         0       /* continuation         */
 145 #define CE_NOTE         1       /* notice               */
 146 #define CE_WARN         2       /* warning              */
 147 #define CE_PANIC        3       /* panic                */
 148 #define CE_IGNORE       4       /* print nothing        */
 149
 150 /*
 151  * ZFS debugging
 152  */
 153
 154 extern void dprintf_setup(int *argc, char **argv);
 155
 156 extern void cmn_err(int, const char *, ...);
 157 extern void vcmn_err(int, const char *, va_list);
 158 extern void panic(const char *, ...);
 159 extern void vpanic(const char *, va_list);
 160
 161 #define fm_panic        panic
 162
 163 extern int aok;
 164
 165 /*
 166  * DTrace SDT probes have different signatures in userland than they do in
 167  * the kernel.  If they're being used in kernel code, re-define them out of
 168  * existence for their counterparts in libzpool.
 169  *
 170  * Here's an example of how to use the set-error probes in userland:
 171  * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
 172  *
 173  * Here's an example of how to use DTRACE_PROBE probes in userland:
 174  * If there is a probe declared as follows:
 175  * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
 176  * Then you can use it as follows:
 177  * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
 178  *     {printf("%u %p\n", arg1, arg2);}
 179  */
 180
 181 #ifdef DTRACE_PROBE
 182 #undef  DTRACE_PROBE
 183 #endif  /* DTRACE_PROBE */
 184 #define DTRACE_PROBE(a) \
 185         ZFS_PROBE0(#a)
 186
 187 #ifdef DTRACE_PROBE1
 188 #undef  DTRACE_PROBE1
 189 #endif  /* DTRACE_PROBE1 */
 190 #define DTRACE_PROBE1(a, b, c) \
 191         ZFS_PROBE1(#a, (unsigned long)c)
 192
 193 #ifdef DTRACE_PROBE2
 194 #undef  DTRACE_PROBE2
 195 #endif  /* DTRACE_PROBE2 */
 196 #define DTRACE_PROBE2(a, b, c, d, e) \
 197         ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
 198
 199 #ifdef DTRACE_PROBE3
 200 #undef  DTRACE_PROBE3
 201 #endif  /* DTRACE_PROBE3 */
 202 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
 203         ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
 204
 205 #ifdef DTRACE_PROBE4
 206 #undef  DTRACE_PROBE4
 207 #endif  /* DTRACE_PROBE4 */
 208 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
 209         ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
 210         (unsigned long)i)
 211
 212 /*
 213  * We use the comma operator so that this macro can be used without much
 214  * additional code.  For example, "return (EINVAL);" becomes
 215  * "return (SET_ERROR(EINVAL));".  Note that the argument will be evaluated
 216  * twice, so it should not have side effects (e.g. something like:
 217  * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
 218  */
 219 #define SET_ERROR(err) (ZFS_SET_ERROR(err), err)
 220
 221 /*
 222  * Threads.  TS_STACK_MIN is dictated by the minimum allowed pthread stack
 223  * size.  While TS_STACK_MAX is somewhat arbitrary, it was selected to be
 224  * large enough for the expected stack depth while small enough to avoid
 225  * exhausting address space with high thread counts.
 226  */
 227 #define TS_MAGIC                0x72f158ab4261e538ull
 228 #define TS_RUN                  0x00000002
 229 #define TS_STACK_MIN            MAX(PTHREAD_STACK_MIN, 32768)
 230 #define TS_STACK_MAX            (256 * 1024)
 231
 232 /* in libzpool, p0 exists only to have its address taken */
 233 typedef struct proc {
 234         uintptr_t       this_is_never_used_dont_dereference_it;
 235 } proc_t;
 236
 237 extern struct proc p0;
 238 #define curproc         (&p0)
 239
 240 typedef void (*thread_func_t)(void *);
 241 typedef void (*thread_func_arg_t)(void *);
 242 typedef pthread_t kt_did_t;
 243
 244 #define kpreempt(x)     ((void)0)
 245
 246 typedef struct kthread {
 247         kt_did_t        t_tid;
 248         thread_func_t   t_func;
 249         void *          t_arg;
 250         pri_t           t_pri;
 251 } kthread_t;
 252
 253 #define curthread                       zk_thread_current()
 254 #define getcomm()                       "unknown"
 255 #define thread_exit                     zk_thread_exit
 256 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 257         zk_thread_create(stk, stksize, (thread_func_t)func, arg,        \
 258             len, NULL, state, pri, PTHREAD_CREATE_DETACHED)
 259 #define thread_join(t)                  zk_thread_join(t)
 260 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 261
 262 extern kthread_t *zk_thread_current(void);
 263 extern void zk_thread_exit(void);
 264 extern kthread_t *zk_thread_create(caddr_t stk, size_t  stksize,
 265         thread_func_t func, void *arg, uint64_t len,
 266         proc_t *pp, int state, pri_t pri, int detachstate);
 267 extern void zk_thread_join(kt_did_t tid);
 268
 269 #define kpreempt_disable()      ((void)0)
 270 #define kpreempt_enable()       ((void)0)
 271
 272 #define PS_NONE         -1
 273
 274 #define issig(why)      (FALSE)
 275 #define ISSIG(thr, why) (FALSE)
 276
 277 /*
 278  * Mutexes
 279  */
 280 #define MTX_MAGIC       0x9522f51362a6e326ull
 281 #define MTX_INIT        ((void *)NULL)
 282 #define MTX_DEST        ((void *)-1UL)
 283
 284 typedef struct kmutex {
 285         void            *m_owner;
 286         uint64_t        m_magic;
 287         pthread_mutex_t m_lock;
 288 } kmutex_t;
 289
 290 #define MUTEX_DEFAULT   0
 291 #define MUTEX_NOLOCKDEP MUTEX_DEFAULT
 292 #define MUTEX_HELD(m)   ((m)->m_owner == curthread)
 293 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 294
 295 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 296 extern void mutex_destroy(kmutex_t *mp);
 297 extern void mutex_enter(kmutex_t *mp);
 298 extern void mutex_exit(kmutex_t *mp);
 299 extern int mutex_tryenter(kmutex_t *mp);
 300 extern void *mutex_owner(kmutex_t *mp);
 301 extern int mutex_held(kmutex_t *mp);
 302
 303 /*
 304  * RW locks
 305  */
 306 #define RW_MAGIC        0x4d31fb123648e78aull
 307 #define RW_INIT         ((void *)NULL)
 308 #define RW_DEST         ((void *)-1UL)
 309
 310 typedef struct krwlock {
 311         void                    *rw_owner;
 312         void                    *rw_wr_owner;
 313         uint64_t                rw_magic;
 314         pthread_rwlock_t        rw_lock;
 315         uint_t                  rw_readers;
 316 } krwlock_t;
 317
 318 typedef int krw_t;
 319
 320 #define RW_READER       0
 321 #define RW_WRITER       1
 322 #define RW_DEFAULT      RW_READER
 323 #define RW_NOLOCKDEP    RW_READER
 324
 325 #define RW_READ_HELD(x)         ((x)->rw_readers > 0)
 326 #define RW_WRITE_HELD(x)        ((x)->rw_wr_owner == curthread)
 327 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 328
 329 #undef RW_LOCK_HELD
 330 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 331
 332 #undef RW_LOCK_HELD
 333 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 334
 335 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 336 extern void rw_destroy(krwlock_t *rwlp);
 337 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 338 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 339 extern int rw_tryupgrade(krwlock_t *rwlp);
 340 extern void rw_exit(krwlock_t *rwlp);
 341 #define rw_downgrade(rwlp) do { } while (0)
 342
 343 extern uid_t crgetuid(cred_t *cr);
 344 extern uid_t crgetruid(cred_t *cr);
 345 extern gid_t crgetgid(cred_t *cr);
 346 extern int crgetngroups(cred_t *cr);
 347 extern gid_t *crgetgroups(cred_t *cr);
 348
 349 /*
 350  * Condition variables
 351  */
 352 #define CV_MAGIC        0xd31ea9a83b1b30c4ull
 353
 354 typedef struct kcondvar {
 355         uint64_t                cv_magic;
 356         pthread_cond_t          cv;
 357 } kcondvar_t;
 358
 359 #define CV_DEFAULT      0
 360 #define CALLOUT_FLAG_ABSOLUTE   0x2
 361
 362 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 363 extern void cv_destroy(kcondvar_t *cv);
 364 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 365 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 366 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
 367     hrtime_t res, int flag);
 368 extern void cv_signal(kcondvar_t *cv);
 369 extern void cv_broadcast(kcondvar_t *cv);
 370 #define cv_timedwait_sig(cv, mp, at)            cv_timedwait(cv, mp, at)
 371 #define cv_wait_sig(cv, mp)                     cv_wait(cv, mp)
 372 #define cv_wait_io(cv, mp)                      cv_wait(cv, mp)
 373 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \
 374         cv_timedwait_hires(cv, mp, t, r, f)
 375
 376 /*
 377  * Thread-specific data
 378  */
 379 #define tsd_get(k) pthread_getspecific(k)
 380 #define tsd_set(k, v) pthread_setspecific(k, v)
 381 #define tsd_create(kp, d) pthread_key_create(kp, d)
 382 #define tsd_destroy(kp) /* nothing */
 383
 384 /*
 385  * Thread-specific data
 386  */
 387 #define tsd_get(k) pthread_getspecific(k)
 388 #define tsd_set(k, v) pthread_setspecific(k, v)
 389 #define tsd_create(kp, d) pthread_key_create(kp, d)
 390 #define tsd_destroy(kp) /* nothing */
 391
 392 /*
 393  * kstat creation, installation and deletion
 394  */
 395 extern kstat_t *kstat_create(const char *, int,
 396     const char *, const char *, uchar_t, ulong_t, uchar_t);
 397 extern void kstat_named_init(kstat_named_t *, const char *, uchar_t);
 398 extern void kstat_install(kstat_t *);
 399 extern void kstat_delete(kstat_t *);
 400 extern void kstat_waitq_enter(kstat_io_t *);
 401 extern void kstat_waitq_exit(kstat_io_t *);
 402 extern void kstat_runq_enter(kstat_io_t *);
 403 extern void kstat_runq_exit(kstat_io_t *);
 404 extern void kstat_waitq_to_runq(kstat_io_t *);
 405 extern void kstat_runq_back_to_waitq(kstat_io_t *);
 406 extern void kstat_set_raw_ops(kstat_t *ksp,
 407     int (*headers)(char *buf, size_t size),
 408     int (*data)(char *buf, size_t size, void *data),
 409     void *(*addr)(kstat_t *ksp, loff_t index));
 410
 411 /*
 412  * Kernel memory
 413  */
 414 #define KM_SLEEP                UMEM_NOFAIL
 415 #define KM_PUSHPAGE             KM_SLEEP
 416 #define KM_NOSLEEP              UMEM_DEFAULT
 417 #define KMC_NODEBUG             UMC_NODEBUG
 418 #define KMC_KMEM                0x0
 419 #define KMC_VMEM                0x0
 420 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 421 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 422 #define kmem_free(_b, _s)       umem_free(_b, _s)
 423 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 424 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 425 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 426 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 427         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 428 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 429 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 430 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 431 #define kmem_debugging()        0
 432 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c);
 433 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 434 #define vmem_qcache_reap(_v)            /* nothing */
 435 #define POINTER_INVALIDATE(_pp)         /* nothing */
 436 #define POINTER_IS_VALID(_p)    0
 437
 438 extern vmem_t *zio_arena;
 439
 440 typedef umem_cache_t kmem_cache_t;
 441
 442 typedef enum kmem_cbrc {
 443         KMEM_CBRC_YES,
 444         KMEM_CBRC_NO,
 445         KMEM_CBRC_LATER,
 446         KMEM_CBRC_DONT_NEED,
 447         KMEM_CBRC_DONT_KNOW
 448 } kmem_cbrc_t;
 449
 450 /*
 451  * Task queues
 452  */
 453
 454 #define TASKQ_NAMELEN   31
 455
 456 typedef uintptr_t taskqid_t;
 457 typedef void (task_func_t)(void *);
 458
 459 typedef struct taskq_ent {
 460         struct taskq_ent        *tqent_next;
 461         struct taskq_ent        *tqent_prev;
 462         task_func_t             *tqent_func;
 463         void                    *tqent_arg;
 464         uintptr_t               tqent_flags;
 465 } taskq_ent_t;
 466
 467 typedef struct taskq {
 468         char            tq_name[TASKQ_NAMELEN + 1];
 469         kmutex_t        tq_lock;
 470         krwlock_t       tq_threadlock;
 471         kcondvar_t      tq_dispatch_cv;
 472         kcondvar_t      tq_wait_cv;
 473         kthread_t       **tq_threadlist;
 474         int             tq_flags;
 475         int             tq_active;
 476         int             tq_nthreads;
 477         int             tq_nalloc;
 478         int             tq_minalloc;
 479         int             tq_maxalloc;
 480         kcondvar_t      tq_maxalloc_cv;
 481         int             tq_maxalloc_wait;
 482         taskq_ent_t     *tq_freelist;
 483         taskq_ent_t     tq_task;
 484 } taskq_t;
 485
 486 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 487
 488 #define TASKQ_PREPOPULATE       0x0001
 489 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 490 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 491 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 492 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 493
 494 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 495 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 496 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 497 #define TQ_FRONT        0x08            /* Queue in front */
 498
 499 #define TASKQID_INVALID         ((taskqid_t)0)
 500
 501 extern taskq_t *system_taskq;
 502 extern taskq_t *system_delay_taskq;
 503
 504 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 505 #define taskq_create_proc(a, b, c, d, e, p, f) \
 506             (taskq_create(a, b, c, d, e, f))
 507 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 508             (taskq_create(a, b, maxclsyspri, d, e, f))
 509 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 510 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
 511     clock_t);
 512 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 513     taskq_ent_t *);
 514 extern int      taskq_empty_ent(taskq_ent_t *);
 515 extern void     taskq_init_ent(taskq_ent_t *);
 516 extern void     taskq_destroy(taskq_t *);
 517 extern void     taskq_wait(taskq_t *);
 518 extern void     taskq_wait_id(taskq_t *, taskqid_t);
 519 extern void     taskq_wait_outstanding(taskq_t *, taskqid_t);
 520 extern int      taskq_member(taskq_t *, kthread_t *);
 521 extern int      taskq_cancel_id(taskq_t *, taskqid_t);
 522 extern void     system_taskq_init(void);
 523 extern void     system_taskq_fini(void);
 524
 525 #define XVA_MAPSIZE     3
 526 #define XVA_MAGIC       0x78766174
 527
 528 /*
 529  * vnodes
 530  */
 531 typedef struct vnode {
 532         uint64_t        v_size;
 533         int             v_fd;
 534         char            *v_path;
 535         int             v_dump_fd;
 536 } vnode_t;
 537
 538 extern char *vn_dumpdir;
 539 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 540
 541 typedef struct xoptattr {
 542         timestruc_t     xoa_createtime; /* Create time of file */
 543         uint8_t         xoa_archive;
 544         uint8_t         xoa_system;
 545         uint8_t         xoa_readonly;
 546         uint8_t         xoa_hidden;
 547         uint8_t         xoa_nounlink;
 548         uint8_t         xoa_immutable;
 549         uint8_t         xoa_appendonly;
 550         uint8_t         xoa_nodump;
 551         uint8_t         xoa_settable;
 552         uint8_t         xoa_opaque;
 553         uint8_t         xoa_av_quarantined;
 554         uint8_t         xoa_av_modified;
 555         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 556         uint8_t         xoa_reparse;
 557         uint8_t         xoa_offline;
 558         uint8_t         xoa_sparse;
 559 } xoptattr_t;
 560
 561 typedef struct vattr {
 562         uint_t          va_mask;        /* bit-mask of attributes */
 563         u_offset_t      va_size;        /* file size in bytes */
 564 } vattr_t;
 565
 566
 567 typedef struct xvattr {
 568         vattr_t         xva_vattr;      /* Embedded vattr structure */
 569         uint32_t        xva_magic;      /* Magic Number */
 570         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 571         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 572         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 573         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 574         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 575 } xvattr_t;
 576
 577 typedef struct vsecattr {
 578         uint_t          vsa_mask;       /* See below */
 579         int             vsa_aclcnt;     /* ACL entry count */
 580         void            *vsa_aclentp;   /* pointer to ACL entries */
 581         int             vsa_dfaclcnt;   /* default ACL entry count */
 582         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 583         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 584 } vsecattr_t;
 585
 586 #define AT_TYPE         0x00001
 587 #define AT_MODE         0x00002
 588 #define AT_UID          0x00004
 589 #define AT_GID          0x00008
 590 #define AT_FSID         0x00010
 591 #define AT_NODEID       0x00020
 592 #define AT_NLINK        0x00040
 593 #define AT_SIZE         0x00080
 594 #define AT_ATIME        0x00100
 595 #define AT_MTIME        0x00200
 596 #define AT_CTIME        0x00400
 597 #define AT_RDEV         0x00800
 598 #define AT_BLKSIZE      0x01000
 599 #define AT_NBLOCKS      0x02000
 600 #define AT_SEQ          0x08000
 601 #define AT_XVATTR       0x10000
 602
 603 #define CRCREAT         0
 604
 605 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 606
 607 #define VOP_CLOSE(vp, f, c, o, cr, ct)  vn_close(vp)
 608 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 609 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 610
 611 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 612
 613 #define VN_RELE(vp)     vn_close(vp)
 614
 615 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 616     int x2, int x3);
 617 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 618     int x2, int x3, vnode_t *vp, int fd);
 619 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 620     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 621 extern void vn_close(vnode_t *vp);
 622
 623 #define vn_remove(path, x1, x2)         remove(path)
 624 #define vn_rename(from, to, seg)        rename((from), (to))
 625 #define vn_is_readonly(vp)              B_FALSE
 626
 627 extern vnode_t *rootdir;
 628
 629 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 630
 631 /*
 632  * Random stuff
 633  */
 634 #define ddi_get_lbolt()         (gethrtime() >> 23)
 635 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 636 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 637
 638 #define ddi_time_before(a, b)           (a < b)
 639 #define ddi_time_after(a, b)            ddi_time_before(b, a)
 640 #define ddi_time_before_eq(a, b)        (!ddi_time_after(a, b))
 641 #define ddi_time_after_eq(a, b)         ddi_time_before_eq(b, a)
 642
 643 #define ddi_time_before64(a, b)         (a < b)
 644 #define ddi_time_after64(a, b)          ddi_time_before64(b, a)
 645 #define ddi_time_before_eq64(a, b)      (!ddi_time_after64(a, b))
 646 #define ddi_time_after_eq64(a, b)       ddi_time_before_eq64(b, a)
 647
 648 extern void delay(clock_t ticks);
 649
 650 #define SEC_TO_TICK(sec)        ((sec) * hz)
 651 #define MSEC_TO_TICK(msec)      ((msec) / (MILLISEC / hz))
 652 #define USEC_TO_TICK(usec)      ((usec) / (MICROSEC / hz))
 653 #define NSEC_TO_TICK(usec)      ((usec) / (NANOSEC / hz))
 654
 655 #define gethrestime_sec() time(NULL)
 656 #define gethrestime(t) \
 657         do {\
 658                 (t)->tv_sec = gethrestime_sec();\
 659                 (t)->tv_nsec = 0;\
 660         } while (0);
 661
 662 #define max_ncpus       64
 663 #define boot_ncpus      (sysconf(_SC_NPROCESSORS_ONLN))
 664
 665 /*
 666  * Process priorities as defined by setpriority(2) and getpriority(2).
 667  */
 668 #define minclsyspri     19
 669 #define maxclsyspri     -20
 670 #define defclsyspri     0
 671
 672 #define CPU_SEQID       ((uintptr_t)pthread_self() & (max_ncpus - 1))
 673
 674 #define kcred           NULL
 675 #define CRED()          NULL
 676
 677 #define ptob(x)         ((x) * PAGESIZE)
 678
 679 extern uint64_t physmem;
 680
 681 extern int highbit64(uint64_t i);
 682 extern int lowbit64(uint64_t i);
 683 extern int highbit(ulong_t i);
 684 extern int lowbit(ulong_t i);
 685 extern int random_get_bytes(uint8_t *ptr, size_t len);
 686 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 687
 688 extern void kernel_init(int);
 689 extern void kernel_fini(void);
 690 extern void thread_init(void);
 691 extern void thread_fini(void);
 692 extern void random_init(void);
 693 extern void random_fini(void);
 694
 695 struct spa;
 696 extern void nicenum(uint64_t num, char *buf);
 697 extern void show_pool_stats(struct spa *);
 698
 699 typedef struct callb_cpr {
 700         kmutex_t        *cc_lockp;
 701 } callb_cpr_t;
 702
 703 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 704         (cp)->cc_lockp = lockp;                                 \
 705 }
 706
 707 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 708         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 709 }
 710
 711 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 712         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 713 }
 714
 715 #define CALLB_CPR_EXIT(cp) {                                    \
 716         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 717         mutex_exit((cp)->cc_lockp);                             \
 718 }
 719
 720 #define zone_dataset_visible(x, y)      (1)
 721 #define INGLOBALZONE(z)                 (1)
 722
 723 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 724 extern char *kmem_asprintf(const char *fmt, ...);
 725 #define strfree(str) kmem_free((str), strlen(str) + 1)
 726
 727 /*
 728  * Hostname information
 729  */
 730 extern char hw_serial[];        /* for userland-emulated hostid access */
 731 extern int ddi_strtoul(const char *str, char **nptr, int base,
 732     unsigned long *result);
 733
 734 extern int ddi_strtoull(const char *str, char **nptr, int base,
 735     u_longlong_t *result);
 736
 737 typedef struct utsname  utsname_t;
 738 extern utsname_t *utsname(void);
 739
 740 /* ZFS Boot Related stuff. */
 741
 742 struct _buf {
 743         intptr_t        _fd;
 744 };
 745
 746 struct bootstat {
 747         uint64_t st_size;
 748 };
 749
 750 typedef struct ace_object {
 751         uid_t           a_who;
 752         uint32_t        a_access_mask;
 753         uint16_t        a_flags;
 754         uint16_t        a_type;
 755         uint8_t         a_obj_type[16];
 756         uint8_t         a_inherit_obj_type[16];
 757 } ace_object_t;
 758
 759
 760 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 761 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 762 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 763 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 764
 765 extern struct _buf *kobj_open_file(char *name);
 766 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 767     unsigned off);
 768 extern void kobj_close_file(struct _buf *file);
 769 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 770 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 771 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 772     cred_t *cr);
 773 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 774 extern int secpolicy_zfs(const cred_t *cr);
 775 extern zoneid_t getzoneid(void);
 776
 777 /* SID stuff */
 778 typedef struct ksiddomain {
 779         uint_t  kd_ref;
 780         uint_t  kd_len;
 781         char    *kd_name;
 782 } ksiddomain_t;
 783
 784 ksiddomain_t *ksid_lookupdomain(const char *);
 785 void ksiddomain_rele(ksiddomain_t *);
 786
 787 #define DDI_SLEEP       KM_SLEEP
 788 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 789         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 790
 791 #define zfs_sleep_until(wakeup)                                         \
 792         do {                                                            \
 793                 hrtime_t delta = wakeup - gethrtime();                  \
 794                 struct timespec ts;                                     \
 795                 ts.tv_sec = delta / NANOSEC;                            \
 796                 ts.tv_nsec = delta % NANOSEC;                           \
 797                 (void) nanosleep(&ts, NULL);                            \
 798         } while (0)
 799
 800 typedef int fstrans_cookie_t;
 801
 802 extern fstrans_cookie_t spl_fstrans_mark(void);
 803 extern void spl_fstrans_unmark(fstrans_cookie_t);
 804 extern int spl_fstrans_check(void);
 805
 806 #endif /* _KERNEL */
 807 #endif  /* _SYS_ZFS_CONTEXT_H */