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/atomic.h>
  36 #include <sys/sysmacros.h>
  37 #include <sys/vmsystm.h>
  38 #include <sys/condvar.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/param.h>
  45 #include <sys/kobj.h>
  46 #include <sys/disp.h>
  47 #include <sys/debug.h>
  48 #include <sys/random.h>
  49 #include <sys/strings.h>
  50 #include <sys/byteorder.h>
  51 #include <sys/list.h>
  52 #include <sys/uio_impl.h>
  53 #include <sys/time.h>
  54 #include <sys/zone.h>
  55 #include <sys/sdt.h>
  56 #include <sys/kstat.h>
  57 #include <sys/zfs_debug.h>
  58 #include <sys/sysevent.h>
  59 #include <sys/sysevent/eventdefs.h>
  60 #include <sys/zfs_delay.h>
  61 #include <sys/sunddi.h>
  62 #include <sys/ctype.h>
  63 #include <sys/disp.h>
  64 #include <sys/trace.h>
  65 #include <sys/procfs_list.h>
  66 #include <linux/dcache_compat.h>
  67 #include <linux/utsname_compat.h>
  68
  69 #else /* _KERNEL */
  70
  71 #define _SYS_MUTEX_H
  72 #define _SYS_RWLOCK_H
  73 #define _SYS_CONDVAR_H
  74 #define _SYS_VNODE_H
  75 #define _SYS_VFS_H
  76 #define _SYS_SUNDDI_H
  77 #define _SYS_CALLB_H
  78
  79 #include <stdio.h>
  80 #include <stdlib.h>
  81 #include <stddef.h>
  82 #include <stdarg.h>
  83 #include <fcntl.h>
  84 #include <unistd.h>
  85 #include <errno.h>
  86 #include <string.h>
  87 #include <strings.h>
  88 #include <pthread.h>
  89 #include <setjmp.h>
  90 #include <assert.h>
  91 #include <alloca.h>
  92 #include <umem.h>
  93 #include <limits.h>
  94 #include <atomic.h>
  95 #include <dirent.h>
  96 #include <time.h>
  97 #include <ctype.h>
  98 #include <signal.h>
  99 #include <sys/mman.h>
 100 #include <sys/note.h>
 101 #include <sys/types.h>
 102 #include <sys/cred.h>
 103 #include <sys/sysmacros.h>
 104 #include <sys/bitmap.h>
 105 #include <sys/resource.h>
 106 #include <sys/byteorder.h>
 107 #include <sys/list.h>
 108 #include <sys/uio.h>
 109 #include <sys/zfs_debug.h>
 110 #include <sys/sdt.h>
 111 #include <sys/kstat.h>
 112 #include <sys/u8_textprep.h>
 113 #include <sys/sysevent.h>
 114 #include <sys/sysevent/eventdefs.h>
 115 #include <sys/sunddi.h>
 116 #include <sys/debug.h>
 117 #include <sys/utsname.h>
 118
 119 /*
 120  * Stack
 121  */
 122
 123 #define noinline        __attribute__((noinline))
 124 #define likely(x)       __builtin_expect((x), 1)
 125
 126 /*
 127  * Debugging
 128  */
 129
 130 /*
 131  * Note that we are not using the debugging levels.
 132  */
 133
 134 #define CE_CONT         0       /* continuation         */
 135 #define CE_NOTE         1       /* notice               */
 136 #define CE_WARN         2       /* warning              */
 137 #define CE_PANIC        3       /* panic                */
 138 #define CE_IGNORE       4       /* print nothing        */
 139
 140 /*
 141  * ZFS debugging
 142  */
 143
 144 extern void dprintf_setup(int *argc, char **argv);
 145
 146 extern void cmn_err(int, const char *, ...);
 147 extern void vcmn_err(int, const char *, va_list);
 148 extern void panic(const char *, ...)  __NORETURN;
 149 extern void vpanic(const char *, va_list)  __NORETURN;
 150
 151 #define fm_panic        panic
 152
 153 extern int aok;
 154
 155 /*
 156  * DTrace SDT probes have different signatures in userland than they do in
 157  * the kernel.  If they're being used in kernel code, re-define them out of
 158  * existence for their counterparts in libzpool.
 159  *
 160  * Here's an example of how to use the set-error probes in userland:
 161  * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
 162  *
 163  * Here's an example of how to use DTRACE_PROBE probes in userland:
 164  * If there is a probe declared as follows:
 165  * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
 166  * Then you can use it as follows:
 167  * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
 168  *     {printf("%u %p\n", arg1, arg2);}
 169  */
 170
 171 #ifdef DTRACE_PROBE
 172 #undef  DTRACE_PROBE
 173 #endif  /* DTRACE_PROBE */
 174 #define DTRACE_PROBE(a) \
 175         ZFS_PROBE0(#a)
 176
 177 #ifdef DTRACE_PROBE1
 178 #undef  DTRACE_PROBE1
 179 #endif  /* DTRACE_PROBE1 */
 180 #define DTRACE_PROBE1(a, b, c) \
 181         ZFS_PROBE1(#a, (unsigned long)c)
 182
 183 #ifdef DTRACE_PROBE2
 184 #undef  DTRACE_PROBE2
 185 #endif  /* DTRACE_PROBE2 */
 186 #define DTRACE_PROBE2(a, b, c, d, e) \
 187         ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
 188
 189 #ifdef DTRACE_PROBE3
 190 #undef  DTRACE_PROBE3
 191 #endif  /* DTRACE_PROBE3 */
 192 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
 193         ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
 194
 195 #ifdef DTRACE_PROBE4
 196 #undef  DTRACE_PROBE4
 197 #endif  /* DTRACE_PROBE4 */
 198 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
 199         ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
 200         (unsigned long)i)
 201
 202 /*
 203  * Threads.
 204  */
 205 typedef pthread_t       kthread_t;
 206
 207 #define TS_RUN          0x00000002
 208 #define TS_JOINABLE     0x00000004
 209
 210 #define curthread       ((void *)(uintptr_t)pthread_self())
 211 #define kpreempt(x)     yield()
 212 #define getcomm()       "unknown"
 213
 214 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 215         zk_thread_create(func, arg, stksize, state)
 216 #define thread_exit()   pthread_exit(NULL)
 217 #define thread_join(t)  pthread_join((pthread_t)(t), NULL)
 218
 219 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 220
 221 /* in libzpool, p0 exists only to have its address taken */
 222 typedef struct proc {
 223         uintptr_t       this_is_never_used_dont_dereference_it;
 224 } proc_t;
 225
 226 extern struct proc p0;
 227 #define curproc         (&p0)
 228
 229 #define PS_NONE         -1
 230
 231 extern kthread_t *zk_thread_create(void (*func)(void *), void *arg,
 232     size_t stksize, int state);
 233
 234 #define issig(why)      (FALSE)
 235 #define ISSIG(thr, why) (FALSE)
 236
 237 #define kpreempt_disable()      ((void)0)
 238 #define kpreempt_enable()       ((void)0)
 239
 240 /*
 241  * Mutexes
 242  */
 243 typedef struct kmutex {
 244         pthread_mutex_t         m_lock;
 245         pthread_t               m_owner;
 246 } kmutex_t;
 247
 248 #define MUTEX_DEFAULT           0
 249 #define MUTEX_NOLOCKDEP         MUTEX_DEFAULT
 250 #define MUTEX_HELD(mp)          pthread_equal((mp)->m_owner, pthread_self())
 251 #define MUTEX_NOT_HELD(mp)      !MUTEX_HELD(mp)
 252
 253 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 254 extern void mutex_destroy(kmutex_t *mp);
 255 extern void mutex_enter(kmutex_t *mp);
 256 extern void mutex_exit(kmutex_t *mp);
 257 extern int mutex_tryenter(kmutex_t *mp);
 258
 259 /*
 260  * RW locks
 261  */
 262 typedef struct krwlock {
 263         pthread_rwlock_t        rw_lock;
 264         pthread_t               rw_owner;
 265         uint_t                  rw_readers;
 266 } krwlock_t;
 267
 268 typedef int krw_t;
 269
 270 #define RW_READER               0
 271 #define RW_WRITER               1
 272 #define RW_DEFAULT              RW_READER
 273 #define RW_NOLOCKDEP            RW_READER
 274
 275 #define RW_READ_HELD(rw)        ((rw)->rw_readers > 0)
 276 #define RW_WRITE_HELD(rw)       pthread_equal((rw)->rw_owner, pthread_self())
 277 #define RW_LOCK_HELD(rw)        (RW_READ_HELD(rw) || RW_WRITE_HELD(rw))
 278
 279 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 280 extern void rw_destroy(krwlock_t *rwlp);
 281 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 282 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 283 extern int rw_tryupgrade(krwlock_t *rwlp);
 284 extern void rw_exit(krwlock_t *rwlp);
 285 #define rw_downgrade(rwlp) do { } while (0)
 286
 287 /*
 288  * Credentials
 289  */
 290 extern uid_t crgetuid(cred_t *cr);
 291 extern uid_t crgetruid(cred_t *cr);
 292 extern gid_t crgetgid(cred_t *cr);
 293 extern int crgetngroups(cred_t *cr);
 294 extern gid_t *crgetgroups(cred_t *cr);
 295
 296 /*
 297  * Condition variables
 298  */
 299 typedef pthread_cond_t          kcondvar_t;
 300
 301 #define CV_DEFAULT              0
 302 #define CALLOUT_FLAG_ABSOLUTE   0x2
 303
 304 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 305 extern void cv_destroy(kcondvar_t *cv);
 306 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 307 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 308 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
 309     hrtime_t res, int flag);
 310 extern void cv_signal(kcondvar_t *cv);
 311 extern void cv_broadcast(kcondvar_t *cv);
 312
 313 #define cv_timedwait_io(cv, mp, at)             cv_timedwait(cv, mp, at)
 314 #define cv_timedwait_sig(cv, mp, at)            cv_timedwait(cv, mp, at)
 315 #define cv_wait_sig(cv, mp)                     cv_wait(cv, mp)
 316 #define cv_wait_io(cv, mp)                      cv_wait(cv, mp)
 317 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \
 318         cv_timedwait_hires(cv, mp, t, r, f)
 319
 320 /*
 321  * Thread-specific data
 322  */
 323 #define tsd_get(k) pthread_getspecific(k)
 324 #define tsd_set(k, v) pthread_setspecific(k, v)
 325 #define tsd_create(kp, d) pthread_key_create(kp, d)
 326 #define tsd_destroy(kp) /* nothing */
 327
 328 /*
 329  * Thread-specific data
 330  */
 331 #define tsd_get(k) pthread_getspecific(k)
 332 #define tsd_set(k, v) pthread_setspecific(k, v)
 333 #define tsd_create(kp, d) pthread_key_create(kp, d)
 334 #define tsd_destroy(kp) /* nothing */
 335
 336 /*
 337  * kstat creation, installation and deletion
 338  */
 339 extern kstat_t *kstat_create(const char *, int,
 340     const char *, const char *, uchar_t, ulong_t, uchar_t);
 341 extern void kstat_named_init(kstat_named_t *, const char *, uchar_t);
 342 extern void kstat_install(kstat_t *);
 343 extern void kstat_delete(kstat_t *);
 344 extern void kstat_waitq_enter(kstat_io_t *);
 345 extern void kstat_waitq_exit(kstat_io_t *);
 346 extern void kstat_runq_enter(kstat_io_t *);
 347 extern void kstat_runq_exit(kstat_io_t *);
 348 extern void kstat_waitq_to_runq(kstat_io_t *);
 349 extern void kstat_runq_back_to_waitq(kstat_io_t *);
 350 extern void kstat_set_raw_ops(kstat_t *ksp,
 351     int (*headers)(char *buf, size_t size),
 352     int (*data)(char *buf, size_t size, void *data),
 353     void *(*addr)(kstat_t *ksp, loff_t index));
 354
 355 /*
 356  * procfs list manipulation
 357  */
 358
 359 struct seq_file { };
 360 void seq_printf(struct seq_file *m, const char *fmt, ...);
 361
 362 typedef struct procfs_list {
 363         void            *pl_private;
 364         kmutex_t        pl_lock;
 365         list_t          pl_list;
 366         uint64_t        pl_next_id;
 367         size_t          pl_node_offset;
 368 } procfs_list_t;
 369
 370 typedef struct procfs_list_node {
 371         list_node_t     pln_link;
 372         uint64_t        pln_id;
 373 } procfs_list_node_t;
 374
 375 void procfs_list_install(const char *module,
 376     const char *name,
 377     procfs_list_t *procfs_list,
 378     int (*show)(struct seq_file *f, void *p),
 379     int (*show_header)(struct seq_file *f),
 380     int (*clear)(procfs_list_t *procfs_list),
 381     size_t procfs_list_node_off);
 382 void procfs_list_uninstall(procfs_list_t *procfs_list);
 383 void procfs_list_destroy(procfs_list_t *procfs_list);
 384 void procfs_list_add(procfs_list_t *procfs_list, void *p);
 385
 386 /*
 387  * Kernel memory
 388  */
 389 #define KM_SLEEP                UMEM_NOFAIL
 390 #define KM_PUSHPAGE             KM_SLEEP
 391 #define KM_NOSLEEP              UMEM_DEFAULT
 392 #define KM_NORMALPRI            0       /* not needed with UMEM_DEFAULT */
 393 #define KMC_NODEBUG             UMC_NODEBUG
 394 #define KMC_KMEM                0x0
 395 #define KMC_VMEM                0x0
 396 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 397 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 398 #define kmem_free(_b, _s)       umem_free(_b, _s)
 399 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 400 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 401 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 402 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 403         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 404 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 405 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 406 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 407 #define kmem_debugging()        0
 408 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c);
 409 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 410 #define vmem_qcache_reap(_v)            /* nothing */
 411 #define POINTER_INVALIDATE(_pp)         /* nothing */
 412 #define POINTER_IS_VALID(_p)    0
 413
 414 extern vmem_t *zio_arena;
 415
 416 typedef umem_cache_t kmem_cache_t;
 417
 418 typedef enum kmem_cbrc {
 419         KMEM_CBRC_YES,
 420         KMEM_CBRC_NO,
 421         KMEM_CBRC_LATER,
 422         KMEM_CBRC_DONT_NEED,
 423         KMEM_CBRC_DONT_KNOW
 424 } kmem_cbrc_t;
 425
 426 /*
 427  * Task queues
 428  */
 429
 430 #define TASKQ_NAMELEN   31
 431
 432 typedef uintptr_t taskqid_t;
 433 typedef void (task_func_t)(void *);
 434
 435 typedef struct taskq_ent {
 436         struct taskq_ent        *tqent_next;
 437         struct taskq_ent        *tqent_prev;
 438         task_func_t             *tqent_func;
 439         void                    *tqent_arg;
 440         uintptr_t               tqent_flags;
 441 } taskq_ent_t;
 442
 443 typedef struct taskq {
 444         char            tq_name[TASKQ_NAMELEN + 1];
 445         kmutex_t        tq_lock;
 446         krwlock_t       tq_threadlock;
 447         kcondvar_t      tq_dispatch_cv;
 448         kcondvar_t      tq_wait_cv;
 449         kthread_t       **tq_threadlist;
 450         int             tq_flags;
 451         int             tq_active;
 452         int             tq_nthreads;
 453         int             tq_nalloc;
 454         int             tq_minalloc;
 455         int             tq_maxalloc;
 456         kcondvar_t      tq_maxalloc_cv;
 457         int             tq_maxalloc_wait;
 458         taskq_ent_t     *tq_freelist;
 459         taskq_ent_t     tq_task;
 460 } taskq_t;
 461
 462 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 463
 464 #define TASKQ_PREPOPULATE       0x0001
 465 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 466 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 467 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 468 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 469
 470 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 471 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 472 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 473 #define TQ_FRONT        0x08            /* Queue in front */
 474
 475 #define TASKQID_INVALID         ((taskqid_t)0)
 476
 477 extern taskq_t *system_taskq;
 478 extern taskq_t *system_delay_taskq;
 479
 480 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 481 #define taskq_create_proc(a, b, c, d, e, p, f) \
 482             (taskq_create(a, b, c, d, e, f))
 483 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 484             (taskq_create(a, b, maxclsyspri, d, e, f))
 485 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 486 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
 487     clock_t);
 488 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 489     taskq_ent_t *);
 490 extern int      taskq_empty_ent(taskq_ent_t *);
 491 extern void     taskq_init_ent(taskq_ent_t *);
 492 extern void     taskq_destroy(taskq_t *);
 493 extern void     taskq_wait(taskq_t *);
 494 extern void     taskq_wait_id(taskq_t *, taskqid_t);
 495 extern void     taskq_wait_outstanding(taskq_t *, taskqid_t);
 496 extern int      taskq_member(taskq_t *, kthread_t *);
 497 extern int      taskq_cancel_id(taskq_t *, taskqid_t);
 498 extern void     system_taskq_init(void);
 499 extern void     system_taskq_fini(void);
 500
 501 #define XVA_MAPSIZE     3
 502 #define XVA_MAGIC       0x78766174
 503
 504 /*
 505  * vnodes
 506  */
 507 typedef struct vnode {
 508         uint64_t        v_size;
 509         int             v_fd;
 510         char            *v_path;
 511         int             v_dump_fd;
 512 } vnode_t;
 513
 514 extern char *vn_dumpdir;
 515 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 516
 517 typedef struct xoptattr {
 518         inode_timespec_t xoa_createtime;        /* Create time of file */
 519         uint8_t         xoa_archive;
 520         uint8_t         xoa_system;
 521         uint8_t         xoa_readonly;
 522         uint8_t         xoa_hidden;
 523         uint8_t         xoa_nounlink;
 524         uint8_t         xoa_immutable;
 525         uint8_t         xoa_appendonly;
 526         uint8_t         xoa_nodump;
 527         uint8_t         xoa_settable;
 528         uint8_t         xoa_opaque;
 529         uint8_t         xoa_av_quarantined;
 530         uint8_t         xoa_av_modified;
 531         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 532         uint8_t         xoa_reparse;
 533         uint8_t         xoa_offline;
 534         uint8_t         xoa_sparse;
 535 } xoptattr_t;
 536
 537 typedef struct vattr {
 538         uint_t          va_mask;        /* bit-mask of attributes */
 539         u_offset_t      va_size;        /* file size in bytes */
 540 } vattr_t;
 541
 542
 543 typedef struct xvattr {
 544         vattr_t         xva_vattr;      /* Embedded vattr structure */
 545         uint32_t        xva_magic;      /* Magic Number */
 546         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 547         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 548         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 549         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 550         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 551 } xvattr_t;
 552
 553 typedef struct vsecattr {
 554         uint_t          vsa_mask;       /* See below */
 555         int             vsa_aclcnt;     /* ACL entry count */
 556         void            *vsa_aclentp;   /* pointer to ACL entries */
 557         int             vsa_dfaclcnt;   /* default ACL entry count */
 558         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 559         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 560 } vsecattr_t;
 561
 562 #define AT_TYPE         0x00001
 563 #define AT_MODE         0x00002
 564 #define AT_UID          0x00004
 565 #define AT_GID          0x00008
 566 #define AT_FSID         0x00010
 567 #define AT_NODEID       0x00020
 568 #define AT_NLINK        0x00040
 569 #define AT_SIZE         0x00080
 570 #define AT_ATIME        0x00100
 571 #define AT_MTIME        0x00200
 572 #define AT_CTIME        0x00400
 573 #define AT_RDEV         0x00800
 574 #define AT_BLKSIZE      0x01000
 575 #define AT_NBLOCKS      0x02000
 576 #define AT_SEQ          0x08000
 577 #define AT_XVATTR       0x10000
 578
 579 #define CRCREAT         0
 580
 581 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 582
 583 #define VOP_CLOSE(vp, f, c, o, cr, ct)  vn_close(vp)
 584 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 585 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 586
 587 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 588
 589 #define VN_RELE(vp)     vn_close(vp)
 590
 591 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 592     int x2, int x3);
 593 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 594     int x2, int x3, vnode_t *vp, int fd);
 595 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 596     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 597 extern void vn_close(vnode_t *vp);
 598
 599 #define vn_remove(path, x1, x2)         remove(path)
 600 #define vn_rename(from, to, seg)        rename((from), (to))
 601 #define vn_is_readonly(vp)              B_FALSE
 602
 603 extern vnode_t *rootdir;
 604
 605 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 606
 607 /*
 608  * Random stuff
 609  */
 610 #define ddi_get_lbolt()         (gethrtime() >> 23)
 611 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 612 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 613
 614 #define ddi_time_before(a, b)           (a < b)
 615 #define ddi_time_after(a, b)            ddi_time_before(b, a)
 616 #define ddi_time_before_eq(a, b)        (!ddi_time_after(a, b))
 617 #define ddi_time_after_eq(a, b)         ddi_time_before_eq(b, a)
 618
 619 #define ddi_time_before64(a, b)         (a < b)
 620 #define ddi_time_after64(a, b)          ddi_time_before64(b, a)
 621 #define ddi_time_before_eq64(a, b)      (!ddi_time_after64(a, b))
 622 #define ddi_time_after_eq64(a, b)       ddi_time_before_eq64(b, a)
 623
 624 extern void delay(clock_t ticks);
 625
 626 #define SEC_TO_TICK(sec)        ((sec) * hz)
 627 #define MSEC_TO_TICK(msec)      ((msec) / (MILLISEC / hz))
 628 #define USEC_TO_TICK(usec)      ((usec) / (MICROSEC / hz))
 629 #define NSEC_TO_TICK(usec)      ((usec) / (NANOSEC / hz))
 630
 631 #define max_ncpus       64
 632 #define boot_ncpus      (sysconf(_SC_NPROCESSORS_ONLN))
 633
 634 /*
 635  * Process priorities as defined by setpriority(2) and getpriority(2).
 636  */
 637 #define minclsyspri     19
 638 #define maxclsyspri     -20
 639 #define defclsyspri     0
 640
 641 #define CPU_SEQID       ((uintptr_t)pthread_self() & (max_ncpus - 1))
 642
 643 #define kcred           NULL
 644 #define CRED()          NULL
 645
 646 #define ptob(x)         ((x) * PAGESIZE)
 647
 648 #define NN_DIVISOR_1000 (1U << 0)
 649 #define NN_NUMBUF_SZ    (6)
 650
 651 extern uint64_t physmem;
 652 extern char *random_path;
 653 extern char *urandom_path;
 654
 655 extern int highbit64(uint64_t i);
 656 extern int lowbit64(uint64_t i);
 657 extern int random_get_bytes(uint8_t *ptr, size_t len);
 658 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 659
 660 extern void kernel_init(int);
 661 extern void kernel_fini(void);
 662 extern void random_init(void);
 663 extern void random_fini(void);
 664
 665 struct spa;
 666 extern void nicenum(uint64_t num, char *buf, size_t);
 667 extern void show_pool_stats(struct spa *);
 668 extern int set_global_var(char *arg);
 669
 670 typedef struct callb_cpr {
 671         kmutex_t        *cc_lockp;
 672 } callb_cpr_t;
 673
 674 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 675         (cp)->cc_lockp = lockp;                                 \
 676 }
 677
 678 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 679         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 680 }
 681
 682 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 683         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 684 }
 685
 686 #define CALLB_CPR_EXIT(cp) {                                    \
 687         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 688         mutex_exit((cp)->cc_lockp);                             \
 689 }
 690
 691 #define zone_dataset_visible(x, y)      (1)
 692 #define INGLOBALZONE(z)                 (1)
 693 extern uint32_t zone_get_hostid(void *zonep);
 694
 695 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 696 extern char *kmem_asprintf(const char *fmt, ...);
 697 #define strfree(str) kmem_free((str), strlen(str) + 1)
 698
 699 /*
 700  * Hostname information
 701  */
 702 extern char hw_serial[];        /* for userland-emulated hostid access */
 703 extern int ddi_strtoul(const char *str, char **nptr, int base,
 704     unsigned long *result);
 705
 706 extern int ddi_strtoull(const char *str, char **nptr, int base,
 707     u_longlong_t *result);
 708
 709 typedef struct utsname  utsname_t;
 710 extern utsname_t *utsname(void);
 711
 712 /* ZFS Boot Related stuff. */
 713
 714 struct _buf {
 715         intptr_t        _fd;
 716 };
 717
 718 struct bootstat {
 719         uint64_t st_size;
 720 };
 721
 722 typedef struct ace_object {
 723         uid_t           a_who;
 724         uint32_t        a_access_mask;
 725         uint16_t        a_flags;
 726         uint16_t        a_type;
 727         uint8_t         a_obj_type[16];
 728         uint8_t         a_inherit_obj_type[16];
 729 } ace_object_t;
 730
 731
 732 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 733 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 734 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 735 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 736
 737 extern struct _buf *kobj_open_file(char *name);
 738 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 739     unsigned off);
 740 extern void kobj_close_file(struct _buf *file);
 741 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 742 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 743 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 744     cred_t *cr);
 745 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 746 extern int secpolicy_zfs(const cred_t *cr);
 747 extern zoneid_t getzoneid(void);
 748
 749 /* SID stuff */
 750 typedef struct ksiddomain {
 751         uint_t  kd_ref;
 752         uint_t  kd_len;
 753         char    *kd_name;
 754 } ksiddomain_t;
 755
 756 ksiddomain_t *ksid_lookupdomain(const char *);
 757 void ksiddomain_rele(ksiddomain_t *);
 758
 759 #define DDI_SLEEP       KM_SLEEP
 760 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 761         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 762
 763 #define zfs_sleep_until(wakeup)                                         \
 764         do {                                                            \
 765                 hrtime_t delta = wakeup - gethrtime();                  \
 766                 struct timespec ts;                                     \
 767                 ts.tv_sec = delta / NANOSEC;                            \
 768                 ts.tv_nsec = delta % NANOSEC;                           \
 769                 (void) nanosleep(&ts, NULL);                            \
 770         } while (0)
 771
 772 typedef int fstrans_cookie_t;
 773
 774 extern fstrans_cookie_t spl_fstrans_mark(void);
 775 extern void spl_fstrans_unmark(fstrans_cookie_t);
 776 extern int __spl_pf_fstrans_check(void);
 777
 778 #define ____cacheline_aligned
 779
 780 #endif /* _KERNEL */
 781 #endif  /* _SYS_ZFS_CONTEXT_H */