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