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, 2018 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 __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /*
  36  * This code compiles in three different contexts. When __KERNEL__ is defined,
  37  * the code uses "unix-like" kernel interfaces. When _STANDALONE is defined, the
  38  * code is running in a reduced capacity environment of the boot loader which is
  39  * generally a subset of both POSIX and kernel interfaces (with a few unique
  40  * interfaces too). When neither are defined, it's in a userland POSIX or
  41  * similar environment.
  42  */
  43 #if defined(__KERNEL__) || defined(_STANDALONE)
  44 #include <sys/note.h>
  45 #include <sys/types.h>
  46 #include <sys/atomic.h>
  47 #include <sys/sysmacros.h>
  48 #include <sys/vmsystm.h>
  49 #include <sys/condvar.h>
  50 #include <sys/cmn_err.h>
  51 #include <sys/kmem.h>
  52 #include <sys/kmem_cache.h>
  53 #include <sys/vmem.h>
  54 #include <sys/taskq.h>
  55 #include <sys/param.h>
  56 #include <sys/disp.h>
  57 #include <sys/debug.h>
  58 #include <sys/random.h>
  59 #include <sys/strings.h>
  60 #include <sys/byteorder.h>
  61 #include <sys/list.h>
  62 #include <sys/time.h>
  63 #include <sys/zone.h>
  64 #include <sys/kstat.h>
  65 #include <sys/zfs_debug.h>
  66 #include <sys/sysevent.h>
  67 #include <sys/sysevent/eventdefs.h>
  68 #include <sys/zfs_delay.h>
  69 #include <sys/sunddi.h>
  70 #include <sys/ctype.h>
  71 #include <sys/disp.h>
  72 #include <sys/trace.h>
  73 #include <sys/procfs_list.h>
  74 #include <sys/mod.h>
  75 #include <sys/uio_impl.h>
  76 #include <sys/zfs_context_os.h>
  77 #else /* _KERNEL || _STANDALONE */
  78
  79 #define _SYS_MUTEX_H
  80 #define _SYS_RWLOCK_H
  81 #define _SYS_CONDVAR_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 <setjmp.h>
  98 #include <assert.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/resource.h>
 112 #include <sys/byteorder.h>
 113 #include <sys/list.h>
 114 #include <sys/mod.h>
 115 #include <sys/uio.h>
 116 #include <sys/zfs_debug.h>
 117 #include <sys/kstat.h>
 118 #include <sys/u8_textprep.h>
 119 #include <sys/sysevent.h>
 120 #include <sys/sysevent/eventdefs.h>
 121 #include <sys/sunddi.h>
 122 #include <sys/debug.h>
 123 #include <sys/utsname.h>
 124 #include <sys/trace_zfs.h>
 125
 126 #include <sys/zfs_context_os.h>
 127
 128 /*
 129  * Stack
 130  */
 131
 132 #define noinline        __attribute__((noinline))
 133 #define likely(x)       __builtin_expect((x), 1)
 134 #define unlikely(x)     __builtin_expect((x), 0)
 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 *, ...)  __NORETURN;
 159 extern void vpanic(const char *, va_list)  __NORETURN;
 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
 186 #ifdef DTRACE_PROBE1
 187 #undef  DTRACE_PROBE1
 188 #endif  /* DTRACE_PROBE1 */
 189 #define DTRACE_PROBE1(a, b, c)
 190
 191 #ifdef DTRACE_PROBE2
 192 #undef  DTRACE_PROBE2
 193 #endif  /* DTRACE_PROBE2 */
 194 #define DTRACE_PROBE2(a, b, c, d, 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
 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
 206 /*
 207  * Tunables.
 208  */
 209 typedef struct zfs_kernel_param {
 210         const char *name;       /* unused stub */
 211 } zfs_kernel_param_t;
 212
 213 #define ZFS_MODULE_PARAM(scope_prefix, name_prefix, name, type, perm, desc)
 214 #define ZFS_MODULE_PARAM_ARGS void
 215 #define ZFS_MODULE_PARAM_CALL(scope_prefix, name_prefix, name, setfunc, \
 216         getfunc, perm, desc)
 217
 218 /*
 219  * Threads.
 220  */
 221 typedef pthread_t       kthread_t;
 222
 223 #define TS_RUN          0x00000002
 224 #define TS_JOINABLE     0x00000004
 225
 226 #define curthread       ((void *)(uintptr_t)pthread_self())
 227 #define kpreempt(x)     yield()
 228 #define getcomm()       "unknown"
 229
 230 #define thread_create_named(name, stk, stksize, func, arg, len, \
 231     pp, state, pri)     \
 232         zk_thread_create(func, arg, stksize, state)
 233 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 234         zk_thread_create(func, arg, stksize, state)
 235 #define thread_exit()   pthread_exit(NULL)
 236 #define thread_join(t)  pthread_join((pthread_t)(t), NULL)
 237
 238 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 239
 240 /* in libzpool, p0 exists only to have its address taken */
 241 typedef struct proc {
 242         uintptr_t       this_is_never_used_dont_dereference_it;
 243 } proc_t;
 244
 245 extern struct proc p0;
 246 #define curproc         (&p0)
 247
 248 #define PS_NONE         -1
 249
 250 extern kthread_t *zk_thread_create(void (*func)(void *), void *arg,
 251     size_t stksize, int state);
 252
 253 #define issig(why)      (FALSE)
 254 #define ISSIG(thr, why) (FALSE)
 255
 256 #define kpreempt_disable()      ((void)0)
 257 #define kpreempt_enable()       ((void)0)
 258 #define cond_resched()          sched_yield()
 259
 260 /*
 261  * Mutexes
 262  */
 263 typedef struct kmutex {
 264         pthread_mutex_t         m_lock;
 265         pthread_t               m_owner;
 266 } kmutex_t;
 267
 268 #define MUTEX_DEFAULT           0
 269 #define MUTEX_NOLOCKDEP         MUTEX_DEFAULT
 270 #define MUTEX_HELD(mp)          pthread_equal((mp)->m_owner, pthread_self())
 271 #define MUTEX_NOT_HELD(mp)      !MUTEX_HELD(mp)
 272
 273 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 274 extern void mutex_destroy(kmutex_t *mp);
 275 extern void mutex_enter(kmutex_t *mp);
 276 extern void mutex_exit(kmutex_t *mp);
 277 extern int mutex_tryenter(kmutex_t *mp);
 278
 279 #define NESTED_SINGLE 1
 280 #define mutex_enter_nested(mp, class) mutex_enter(mp)
 281 /*
 282  * RW locks
 283  */
 284 typedef struct krwlock {
 285         pthread_rwlock_t        rw_lock;
 286         pthread_t               rw_owner;
 287         uint_t                  rw_readers;
 288 } krwlock_t;
 289
 290 typedef int krw_t;
 291
 292 #define RW_READER               0
 293 #define RW_WRITER               1
 294 #define RW_DEFAULT              RW_READER
 295 #define RW_NOLOCKDEP            RW_READER
 296
 297 #define RW_READ_HELD(rw)        ((rw)->rw_readers > 0)
 298 #define RW_WRITE_HELD(rw)       pthread_equal((rw)->rw_owner, pthread_self())
 299 #define RW_LOCK_HELD(rw)        (RW_READ_HELD(rw) || RW_WRITE_HELD(rw))
 300
 301 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 302 extern void rw_destroy(krwlock_t *rwlp);
 303 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 304 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 305 extern int rw_tryupgrade(krwlock_t *rwlp);
 306 extern void rw_exit(krwlock_t *rwlp);
 307 #define rw_downgrade(rwlp) do { } while (0)
 308
 309 /*
 310  * Credentials
 311  */
 312 extern uid_t crgetuid(cred_t *cr);
 313 extern uid_t crgetruid(cred_t *cr);
 314 extern gid_t crgetgid(cred_t *cr);
 315 extern int crgetngroups(cred_t *cr);
 316 extern gid_t *crgetgroups(cred_t *cr);
 317
 318 /*
 319  * Condition variables
 320  */
 321 typedef pthread_cond_t          kcondvar_t;
 322
 323 #define CV_DEFAULT              0
 324 #define CALLOUT_FLAG_ABSOLUTE   0x2
 325
 326 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 327 extern void cv_destroy(kcondvar_t *cv);
 328 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 329 extern int cv_wait_sig(kcondvar_t *cv, kmutex_t *mp);
 330 extern int cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 331 extern int cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
 332     hrtime_t res, int flag);
 333 extern void cv_signal(kcondvar_t *cv);
 334 extern void cv_broadcast(kcondvar_t *cv);
 335
 336 #define cv_timedwait_io(cv, mp, at)             cv_timedwait(cv, mp, at)
 337 #define cv_timedwait_idle(cv, mp, at)           cv_timedwait(cv, mp, at)
 338 #define cv_timedwait_sig(cv, mp, at)            cv_timedwait(cv, mp, at)
 339 #define cv_wait_io(cv, mp)                      cv_wait(cv, mp)
 340 #define cv_wait_idle(cv, mp)                    cv_wait(cv, mp)
 341 #define cv_wait_io_sig(cv, mp)                  cv_wait_sig(cv, mp)
 342 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \
 343         cv_timedwait_hires(cv, mp, t, r, f)
 344 #define cv_timedwait_idle_hires(cv, mp, t, r, f) \
 345         cv_timedwait_hires(cv, mp, t, r, f)
 346
 347 /*
 348  * Thread-specific data
 349  */
 350 #define tsd_get(k) pthread_getspecific(k)
 351 #define tsd_set(k, v) pthread_setspecific(k, v)
 352 #define tsd_create(kp, d) pthread_key_create((pthread_key_t *)kp, d)
 353 #define tsd_destroy(kp) /* nothing */
 354 #ifdef __FreeBSD__
 355 typedef off_t loff_t;
 356 #endif
 357
 358 /*
 359  * kstat creation, installation and deletion
 360  */
 361 extern kstat_t *kstat_create(const char *, int,
 362     const char *, const char *, uchar_t, ulong_t, uchar_t);
 363 extern void kstat_install(kstat_t *);
 364 extern void kstat_delete(kstat_t *);
 365 extern void kstat_waitq_enter(kstat_io_t *);
 366 extern void kstat_waitq_exit(kstat_io_t *);
 367 extern void kstat_runq_enter(kstat_io_t *);
 368 extern void kstat_runq_exit(kstat_io_t *);
 369 extern void kstat_waitq_to_runq(kstat_io_t *);
 370 extern void kstat_runq_back_to_waitq(kstat_io_t *);
 371 extern void kstat_set_raw_ops(kstat_t *ksp,
 372     int (*headers)(char *buf, size_t size),
 373     int (*data)(char *buf, size_t size, void *data),
 374     void *(*addr)(kstat_t *ksp, loff_t index));
 375
 376 /*
 377  * procfs list manipulation
 378  */
 379
 380 typedef struct procfs_list {
 381         void            *pl_private;
 382         kmutex_t        pl_lock;
 383         list_t          pl_list;
 384         uint64_t        pl_next_id;
 385         size_t          pl_node_offset;
 386 } procfs_list_t;
 387
 388 #ifndef __cplusplus
 389 struct seq_file { };
 390 void seq_printf(struct seq_file *m, const char *fmt, ...);
 391
 392 typedef struct procfs_list_node {
 393         list_node_t     pln_link;
 394         uint64_t        pln_id;
 395 } procfs_list_node_t;
 396
 397 void procfs_list_install(const char *module,
 398     const char *submodule,
 399     const char *name,
 400     mode_t mode,
 401     procfs_list_t *procfs_list,
 402     int (*show)(struct seq_file *f, void *p),
 403     int (*show_header)(struct seq_file *f),
 404     int (*clear)(procfs_list_t *procfs_list),
 405     size_t procfs_list_node_off);
 406 void procfs_list_uninstall(procfs_list_t *procfs_list);
 407 void procfs_list_destroy(procfs_list_t *procfs_list);
 408 void procfs_list_add(procfs_list_t *procfs_list, void *p);
 409 #endif
 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 KM_NORMALPRI            0       /* not needed with UMEM_DEFAULT */
 418 #define KMC_NODEBUG             UMC_NODEBUG
 419 #define KMC_KVMEM               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 POINTER_INVALIDATE(_pp)         /* nothing */
 435 #define POINTER_IS_VALID(_p)    0
 436
 437 typedef umem_cache_t kmem_cache_t;
 438
 439 typedef enum kmem_cbrc {
 440         KMEM_CBRC_YES,
 441         KMEM_CBRC_NO,
 442         KMEM_CBRC_LATER,
 443         KMEM_CBRC_DONT_NEED,
 444         KMEM_CBRC_DONT_KNOW
 445 } kmem_cbrc_t;
 446
 447 /*
 448  * Task queues
 449  */
 450
 451 #define TASKQ_NAMELEN   31
 452
 453 typedef uintptr_t taskqid_t;
 454 typedef void (task_func_t)(void *);
 455
 456 typedef struct taskq_ent {
 457         struct taskq_ent        *tqent_next;
 458         struct taskq_ent        *tqent_prev;
 459         task_func_t             *tqent_func;
 460         void                    *tqent_arg;
 461         uintptr_t               tqent_flags;
 462 } taskq_ent_t;
 463
 464 typedef struct taskq {
 465         char            tq_name[TASKQ_NAMELEN + 1];
 466         kmutex_t        tq_lock;
 467         krwlock_t       tq_threadlock;
 468         kcondvar_t      tq_dispatch_cv;
 469         kcondvar_t      tq_wait_cv;
 470         kthread_t       **tq_threadlist;
 471         int             tq_flags;
 472         int             tq_active;
 473         int             tq_nthreads;
 474         int             tq_nalloc;
 475         int             tq_minalloc;
 476         int             tq_maxalloc;
 477         kcondvar_t      tq_maxalloc_cv;
 478         int             tq_maxalloc_wait;
 479         taskq_ent_t     *tq_freelist;
 480         taskq_ent_t     tq_task;
 481 } taskq_t;
 482
 483 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 484
 485 #define TASKQ_PREPOPULATE       0x0001
 486 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 487 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 488 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 489 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 490
 491 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 492 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 493 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 494 #define TQ_FRONT        0x08            /* Queue in front */
 495
 496 #define TASKQID_INVALID         ((taskqid_t)0)
 497
 498 extern taskq_t *system_taskq;
 499 extern taskq_t *system_delay_taskq;
 500
 501 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 502 #define taskq_create_proc(a, b, c, d, e, p, f) \
 503             (taskq_create(a, b, c, d, e, f))
 504 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 505             (taskq_create(a, b, maxclsyspri, d, e, f))
 506 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 507 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
 508     clock_t);
 509 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 510     taskq_ent_t *);
 511 extern int      taskq_empty_ent(taskq_ent_t *);
 512 extern void     taskq_init_ent(taskq_ent_t *);
 513 extern void     taskq_destroy(taskq_t *);
 514 extern void     taskq_wait(taskq_t *);
 515 extern void     taskq_wait_id(taskq_t *, taskqid_t);
 516 extern void     taskq_wait_outstanding(taskq_t *, taskqid_t);
 517 extern int      taskq_member(taskq_t *, kthread_t *);
 518 extern taskq_t  *taskq_of_curthread(void);
 519 extern int      taskq_cancel_id(taskq_t *, taskqid_t);
 520 extern void     system_taskq_init(void);
 521 extern void     system_taskq_fini(void);
 522
 523 #define XVA_MAPSIZE     3
 524 #define XVA_MAGIC       0x78766174
 525
 526 extern char *vn_dumpdir;
 527 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 528
 529 typedef struct xoptattr {
 530         inode_timespec_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_MODE         0x00002
 575 #define AT_UID          0x00004
 576 #define AT_GID          0x00008
 577 #define AT_FSID         0x00010
 578 #define AT_NODEID       0x00020
 579 #define AT_NLINK        0x00040
 580 #define AT_SIZE         0x00080
 581 #define AT_ATIME        0x00100
 582 #define AT_MTIME        0x00200
 583 #define AT_CTIME        0x00400
 584 #define AT_RDEV         0x00800
 585 #define AT_BLKSIZE      0x01000
 586 #define AT_NBLOCKS      0x02000
 587 #define AT_SEQ          0x08000
 588 #define AT_XVATTR       0x10000
 589
 590 #define CRCREAT         0
 591
 592 #define F_FREESP        11
 593 #define FIGNORECASE     0x80000 /* request case-insensitive lookups */
 594
 595 /*
 596  * Random stuff
 597  */
 598 #define ddi_get_lbolt()         (gethrtime() >> 23)
 599 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 600 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 601
 602 #define ddi_time_before(a, b)           (a < b)
 603 #define ddi_time_after(a, b)            ddi_time_before(b, a)
 604 #define ddi_time_before_eq(a, b)        (!ddi_time_after(a, b))
 605 #define ddi_time_after_eq(a, b)         ddi_time_before_eq(b, a)
 606
 607 #define ddi_time_before64(a, b)         (a < b)
 608 #define ddi_time_after64(a, b)          ddi_time_before64(b, a)
 609 #define ddi_time_before_eq64(a, b)      (!ddi_time_after64(a, b))
 610 #define ddi_time_after_eq64(a, b)       ddi_time_before_eq64(b, a)
 611
 612 extern void delay(clock_t ticks);
 613
 614 #define SEC_TO_TICK(sec)        ((sec) * hz)
 615 #define MSEC_TO_TICK(msec)      (howmany((hrtime_t)(msec) * hz, MILLISEC))
 616 #define USEC_TO_TICK(usec)      (howmany((hrtime_t)(usec) * hz, MICROSEC))
 617 #define NSEC_TO_TICK(nsec)      (howmany((hrtime_t)(nsec) * hz, NANOSEC))
 618
 619 #define max_ncpus       64
 620 #define boot_ncpus      (sysconf(_SC_NPROCESSORS_ONLN))
 621
 622 /*
 623  * Process priorities as defined by setpriority(2) and getpriority(2).
 624  */
 625 #define minclsyspri     19
 626 #define maxclsyspri     -20
 627 #define defclsyspri     0
 628
 629 #define CPU_SEQID       ((uintptr_t)pthread_self() & (max_ncpus - 1))
 630 #define CPU_SEQID_UNSTABLE      CPU_SEQID
 631
 632 #define kcred           NULL
 633 #define CRED()          NULL
 634
 635 #define ptob(x)         ((x) * PAGESIZE)
 636
 637 #define NN_DIVISOR_1000 (1U << 0)
 638 #define NN_NUMBUF_SZ    (6)
 639
 640 extern uint64_t physmem;
 641 extern char *random_path;
 642 extern char *urandom_path;
 643
 644 extern int highbit64(uint64_t i);
 645 extern int lowbit64(uint64_t i);
 646 extern int random_get_bytes(uint8_t *ptr, size_t len);
 647 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 648
 649 extern void kernel_init(int mode);
 650 extern void kernel_fini(void);
 651 extern void random_init(void);
 652 extern void random_fini(void);
 653
 654 struct spa;
 655 extern void show_pool_stats(struct spa *);
 656 extern int set_global_var(char const *arg);
 657
 658 typedef struct callb_cpr {
 659         kmutex_t        *cc_lockp;
 660 } callb_cpr_t;
 661
 662 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 663         (cp)->cc_lockp = lockp;                                 \
 664 }
 665
 666 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 667         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 668 }
 669
 670 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 671         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 672 }
 673
 674 #define CALLB_CPR_EXIT(cp) {                                    \
 675         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 676         mutex_exit((cp)->cc_lockp);                             \
 677 }
 678
 679 #define zone_dataset_visible(x, y)      (1)
 680 #define INGLOBALZONE(z)                 (1)
 681 extern uint32_t zone_get_hostid(void *zonep);
 682
 683 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 684 extern char *kmem_asprintf(const char *fmt, ...);
 685 #define kmem_strfree(str) kmem_free((str), strlen(str) + 1)
 686 #define kmem_strdup(s)  strdup(s)
 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 int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 727 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 728     cred_t *cr);
 729 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 730 extern int secpolicy_zfs(const cred_t *cr);
 731 extern int secpolicy_zfs_proc(const cred_t *cr, proc_t *proc);
 732 extern zoneid_t getzoneid(void);
 733
 734 /* SID stuff */
 735 typedef struct ksiddomain {
 736         uint_t  kd_ref;
 737         uint_t  kd_len;
 738         char    *kd_name;
 739 } ksiddomain_t;
 740
 741 ksiddomain_t *ksid_lookupdomain(const char *);
 742 void ksiddomain_rele(ksiddomain_t *);
 743
 744 #define DDI_SLEEP       KM_SLEEP
 745 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 746         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 747
 748 #define zfs_sleep_until(wakeup)                                         \
 749         do {                                                            \
 750                 hrtime_t delta = wakeup - gethrtime();                  \
 751                 struct timespec ts;                                     \
 752                 ts.tv_sec = delta / NANOSEC;                            \
 753                 ts.tv_nsec = delta % NANOSEC;                           \
 754                 (void) nanosleep(&ts, NULL);                            \
 755         } while (0)
 756
 757 typedef int fstrans_cookie_t;
 758
 759 extern fstrans_cookie_t spl_fstrans_mark(void);
 760 extern void spl_fstrans_unmark(fstrans_cookie_t);
 761 extern int __spl_pf_fstrans_check(void);
 762 extern int kmem_cache_reap_active(void);
 763
 764 #define ____cacheline_aligned
 765
 766 /*
 767  * Kernel modules
 768  */
 769 #define __init
 770 #define __exit
 771
 772 #endif  /* _KERNEL || _STANDALONE */
 773
 774 #ifdef __cplusplus
 775 };
 776 #endif
 777
 778 #endif  /* _SYS_ZFS_CONTEXT_H */