include/sys/zfs_context.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  24  * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
  25  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  26  */
  27
  28 #ifndef _SYS_ZFS_CONTEXT_H
  29 #define _SYS_ZFS_CONTEXT_H
  30
  31 #ifdef __KERNEL__
  32
  33 #include <sys/note.h>
  34 #include <sys/types.h>
  35 #include <sys/t_lock.h>
  36 #include <sys/atomic.h>
  37 #include <sys/sysmacros.h>
  38 #include <sys/bitmap.h>
  39 #include <sys/cmn_err.h>
  40 #include <sys/kmem.h>
  41 #include <sys/kmem_cache.h>
  42 #include <sys/vmem.h>
  43 #include <sys/taskq.h>
  44 #include <sys/buf.h>
  45 #include <sys/param.h>
  46 #include <sys/systm.h>
  47 #include <sys/cpuvar.h>
  48 #include <sys/kobj.h>
  49 #include <sys/conf.h>
  50 #include <sys/disp.h>
  51 #include <sys/debug.h>
  52 #include <sys/random.h>
  53 #include <sys/byteorder.h>
  54 #include <sys/systm.h>
  55 #include <sys/list.h>
  56 #include <sys/uio_impl.h>
  57 #include <sys/dirent.h>
  58 #include <sys/time.h>
  59 #include <vm/seg_kmem.h>
  60 #include <sys/zone.h>
  61 #include <sys/sdt.h>
  62 #include <sys/kstat.h>
  63 #include <sys/zfs_debug.h>
  64 #include <sys/sysevent.h>
  65 #include <sys/sysevent/eventdefs.h>
  66 #include <sys/zfs_delay.h>
  67 #include <sys/sunddi.h>
  68 #include <sys/ctype.h>
  69 #include <sys/disp.h>
  70 #include <sys/trace.h>
  71 #include <linux/dcache_compat.h>
  72 #include <linux/utsname_compat.h>
  73
  74 #else /* _KERNEL */
  75
  76 #define _SYS_MUTEX_H
  77 #define _SYS_RWLOCK_H
  78 #define _SYS_CONDVAR_H
  79 #define _SYS_SYSTM_H
  80 #define _SYS_T_LOCK_H
  81 #define _SYS_VNODE_H
  82 #define _SYS_VFS_H
  83 #define _SYS_SUNDDI_H
  84 #define _SYS_CALLB_H
  85
  86 #include <stdio.h>
  87 #include <stdlib.h>
  88 #include <stddef.h>
  89 #include <stdarg.h>
  90 #include <fcntl.h>
  91 #include <unistd.h>
  92 #include <errno.h>
  93 #include <string.h>
  94 #include <strings.h>
  95 #include <pthread.h>
  96 #include <setjmp.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/sysevent.h>
 122 #include <sys/sysevent/eventdefs.h>
 123 #include <sys/sunddi.h>
 124 #include <sys/debug.h>
 125 #include <sys/utsname.h>
 126
 127 /*
 128  * Stack
 129  */
 130
 131 #define noinline        __attribute__((noinline))
 132 #define likely(x)       __builtin_expect((x), 1)
 133
 134 /*
 135  * Debugging
 136  */
 137
 138 /*
 139  * Note that we are not using the debugging levels.
 140  */
 141
 142 #define CE_CONT         0       /* continuation         */
 143 #define CE_NOTE         1       /* notice               */
 144 #define CE_WARN         2       /* warning              */
 145 #define CE_PANIC        3       /* panic                */
 146 #define CE_IGNORE       4       /* print nothing        */
 147
 148 /*
 149  * ZFS debugging
 150  */
 151
 152 extern void dprintf_setup(int *argc, char **argv);
 153
 154 extern void cmn_err(int, const char *, ...);
 155 extern void vcmn_err(int, const char *, va_list);
 156 extern void panic(const char *, ...)  __NORETURN;
 157 extern void vpanic(const char *, va_list)  __NORETURN;
 158
 159 #define fm_panic        panic
 160
 161 extern int aok;
 162
 163 /*
 164  * DTrace SDT probes have different signatures in userland than they do in
 165  * the kernel.  If they're being used in kernel code, re-define them out of
 166  * existence for their counterparts in libzpool.
 167  *
 168  * Here's an example of how to use the set-error probes in userland:
 169  * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
 170  *
 171  * Here's an example of how to use DTRACE_PROBE probes in userland:
 172  * If there is a probe declared as follows:
 173  * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
 174  * Then you can use it as follows:
 175  * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
 176  *     {printf("%u %p\n", arg1, arg2);}
 177  */
 178
 179 #ifdef DTRACE_PROBE
 180 #undef  DTRACE_PROBE
 181 #endif  /* DTRACE_PROBE */
 182 #define DTRACE_PROBE(a) \
 183         ZFS_PROBE0(#a)
 184
 185 #ifdef DTRACE_PROBE1
 186 #undef  DTRACE_PROBE1
 187 #endif  /* DTRACE_PROBE1 */
 188 #define DTRACE_PROBE1(a, b, c) \
 189         ZFS_PROBE1(#a, (unsigned long)c)
 190
 191 #ifdef DTRACE_PROBE2
 192 #undef  DTRACE_PROBE2
 193 #endif  /* DTRACE_PROBE2 */
 194 #define DTRACE_PROBE2(a, b, c, d, e) \
 195         ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
 196
 197 #ifdef DTRACE_PROBE3
 198 #undef  DTRACE_PROBE3
 199 #endif  /* DTRACE_PROBE3 */
 200 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
 201         ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
 202
 203 #ifdef DTRACE_PROBE4
 204 #undef  DTRACE_PROBE4
 205 #endif  /* DTRACE_PROBE4 */
 206 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
 207         ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
 208         (unsigned long)i)
 209
 210 /*
 211  * Threads.
 212  */
 213 typedef pthread_t       kthread_t;
 214
 215 #define TS_RUN          0x00000002
 216 #define TS_JOINABLE     0x00000004
 217
 218 #define curthread       ((void *)(uintptr_t)pthread_self())
 219 #define kpreempt(x)     yield()
 220 #define getcomm()       "unknown"
 221
 222 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 223         zk_thread_create(func, arg, stksize, state)
 224 #define thread_exit()   pthread_exit(NULL)
 225 #define thread_join(t)  pthread_join((pthread_t)(t), NULL)
 226
 227 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 228
 229 /* in libzpool, p0 exists only to have its address taken */
 230 typedef struct proc {
 231         uintptr_t       this_is_never_used_dont_dereference_it;
 232 } proc_t;
 233
 234 extern struct proc p0;
 235 #define curproc         (&p0)
 236
 237 #define PS_NONE         -1
 238
 239 extern kthread_t *zk_thread_create(void (*func)(void *), void *arg,
 240     size_t stksize, int state);
 241
 242 #define issig(why)      (FALSE)
 243 #define ISSIG(thr, why) (FALSE)
 244
 245 #define kpreempt_disable()      ((void)0)
 246 #define kpreempt_enable()       ((void)0)
 247
 248 /*
 249  * Mutexes
 250  */
 251 typedef struct kmutex {
 252         pthread_mutex_t         m_lock;
 253         pthread_t               m_owner;
 254 } kmutex_t;
 255
 256 #define MUTEX_DEFAULT           0
 257 #define MUTEX_NOLOCKDEP         MUTEX_DEFAULT
 258 #define MUTEX_HELD(mp)          pthread_equal((mp)->m_owner, pthread_self())
 259 #define MUTEX_NOT_HELD(mp)      !MUTEX_HELD(mp)
 260
 261 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 262 extern void mutex_destroy(kmutex_t *mp);
 263 extern void mutex_enter(kmutex_t *mp);
 264 extern void mutex_exit(kmutex_t *mp);
 265 extern int mutex_tryenter(kmutex_t *mp);
 266
 267 /*
 268  * RW locks
 269  */
 270 typedef struct krwlock {
 271         pthread_rwlock_t        rw_lock;
 272         pthread_t               rw_owner;
 273         uint_t                  rw_readers;
 274 } krwlock_t;
 275
 276 typedef int krw_t;
 277
 278 #define RW_READER               0
 279 #define RW_WRITER               1
 280 #define RW_DEFAULT              RW_READER
 281 #define RW_NOLOCKDEP            RW_READER
 282
 283 #define RW_READ_HELD(rw)        ((rw)->rw_readers > 0)
 284 #define RW_WRITE_HELD(rw)       pthread_equal((rw)->rw_owner, pthread_self())
 285 #define RW_LOCK_HELD(rw)        (RW_READ_HELD(rw) || RW_WRITE_HELD(rw))
 286
 287 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 288 extern void rw_destroy(krwlock_t *rwlp);
 289 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 290 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 291 extern int rw_tryupgrade(krwlock_t *rwlp);
 292 extern void rw_exit(krwlock_t *rwlp);
 293 #define rw_downgrade(rwlp) do { } while (0)
 294
 295 /*
 296  * Credentials
 297  */
 298 extern uid_t crgetuid(cred_t *cr);
 299 extern uid_t crgetruid(cred_t *cr);
 300 extern gid_t crgetgid(cred_t *cr);
 301 extern int crgetngroups(cred_t *cr);
 302 extern gid_t *crgetgroups(cred_t *cr);
 303
 304 /*
 305  * Condition variables
 306  */
 307 typedef pthread_cond_t          kcondvar_t;
 308
 309 #define CV_DEFAULT              0
 310 #define CALLOUT_FLAG_ABSOLUTE   0x2
 311
 312 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 313 extern void cv_destroy(kcondvar_t *cv);
 314 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 315 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 316 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
 317     hrtime_t res, int flag);
 318 extern void cv_signal(kcondvar_t *cv);
 319 extern void cv_broadcast(kcondvar_t *cv);
 320
 321 #define cv_timedwait_io(cv, mp, at)             cv_timedwait(cv, mp, at)
 322 #define cv_timedwait_sig(cv, mp, at)            cv_timedwait(cv, mp, at)
 323 #define cv_wait_sig(cv, mp)                     cv_wait(cv, mp)
 324 #define cv_wait_io(cv, mp)                      cv_wait(cv, mp)
 325 #define cv_timedwait_sig_hires(cv, mp, t, r, f) \
 326         cv_timedwait_hires(cv, mp, t, r, f)
 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  * Thread-specific data
 338  */
 339 #define tsd_get(k) pthread_getspecific(k)
 340 #define tsd_set(k, v) pthread_setspecific(k, v)
 341 #define tsd_create(kp, d) pthread_key_create(kp, d)
 342 #define tsd_destroy(kp) /* nothing */
 343
 344 /*
 345  * kstat creation, installation and deletion
 346  */
 347 extern kstat_t *kstat_create(const char *, int,
 348     const char *, const char *, uchar_t, ulong_t, uchar_t);
 349 extern void kstat_named_init(kstat_named_t *, const char *, uchar_t);
 350 extern void kstat_install(kstat_t *);
 351 extern void kstat_delete(kstat_t *);
 352 extern void kstat_waitq_enter(kstat_io_t *);
 353 extern void kstat_waitq_exit(kstat_io_t *);
 354 extern void kstat_runq_enter(kstat_io_t *);
 355 extern void kstat_runq_exit(kstat_io_t *);
 356 extern void kstat_waitq_to_runq(kstat_io_t *);
 357 extern void kstat_runq_back_to_waitq(kstat_io_t *);
 358 extern void kstat_set_raw_ops(kstat_t *ksp,
 359     int (*headers)(char *buf, size_t size),
 360     int (*data)(char *buf, size_t size, void *data),
 361     void *(*addr)(kstat_t *ksp, loff_t index));
 362
 363 /*
 364  * Kernel memory
 365  */
 366 #define KM_SLEEP                UMEM_NOFAIL
 367 #define KM_PUSHPAGE             KM_SLEEP
 368 #define KM_NOSLEEP              UMEM_DEFAULT
 369 #define KM_NORMALPRI            0       /* not needed with UMEM_DEFAULT */
 370 #define KMC_NODEBUG             UMC_NODEBUG
 371 #define KMC_KMEM                0x0
 372 #define KMC_VMEM                0x0
 373 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 374 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 375 #define kmem_free(_b, _s)       umem_free(_b, _s)
 376 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 377 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 378 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 379 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 380         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 381 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 382 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 383 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 384 #define kmem_debugging()        0
 385 #define kmem_cache_reap_now(_c) umem_cache_reap_now(_c);
 386 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 387 #define vmem_qcache_reap(_v)            /* nothing */
 388 #define POINTER_INVALIDATE(_pp)         /* nothing */
 389 #define POINTER_IS_VALID(_p)    0
 390
 391 extern vmem_t *zio_arena;
 392
 393 typedef umem_cache_t kmem_cache_t;
 394
 395 typedef enum kmem_cbrc {
 396         KMEM_CBRC_YES,
 397         KMEM_CBRC_NO,
 398         KMEM_CBRC_LATER,
 399         KMEM_CBRC_DONT_NEED,
 400         KMEM_CBRC_DONT_KNOW
 401 } kmem_cbrc_t;
 402
 403 /*
 404  * Task queues
 405  */
 406
 407 #define TASKQ_NAMELEN   31
 408
 409 typedef uintptr_t taskqid_t;
 410 typedef void (task_func_t)(void *);
 411
 412 typedef struct taskq_ent {
 413         struct taskq_ent        *tqent_next;
 414         struct taskq_ent        *tqent_prev;
 415         task_func_t             *tqent_func;
 416         void                    *tqent_arg;
 417         uintptr_t               tqent_flags;
 418 } taskq_ent_t;
 419
 420 typedef struct taskq {
 421         char            tq_name[TASKQ_NAMELEN + 1];
 422         kmutex_t        tq_lock;
 423         krwlock_t       tq_threadlock;
 424         kcondvar_t      tq_dispatch_cv;
 425         kcondvar_t      tq_wait_cv;
 426         kthread_t       **tq_threadlist;
 427         int             tq_flags;
 428         int             tq_active;
 429         int             tq_nthreads;
 430         int             tq_nalloc;
 431         int             tq_minalloc;
 432         int             tq_maxalloc;
 433         kcondvar_t      tq_maxalloc_cv;
 434         int             tq_maxalloc_wait;
 435         taskq_ent_t     *tq_freelist;
 436         taskq_ent_t     tq_task;
 437 } taskq_t;
 438
 439 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 440
 441 #define TASKQ_PREPOPULATE       0x0001
 442 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 443 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 444 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 445 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 446
 447 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 448 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 449 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 450 #define TQ_FRONT        0x08            /* Queue in front */
 451
 452 #define TASKQID_INVALID         ((taskqid_t)0)
 453
 454 extern taskq_t *system_taskq;
 455 extern taskq_t *system_delay_taskq;
 456
 457 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 458 #define taskq_create_proc(a, b, c, d, e, p, f) \
 459             (taskq_create(a, b, c, d, e, f))
 460 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 461             (taskq_create(a, b, maxclsyspri, d, e, f))
 462 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 463 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
 464     clock_t);
 465 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 466     taskq_ent_t *);
 467 extern int      taskq_empty_ent(taskq_ent_t *);
 468 extern void     taskq_init_ent(taskq_ent_t *);
 469 extern void     taskq_destroy(taskq_t *);
 470 extern void     taskq_wait(taskq_t *);
 471 extern void     taskq_wait_id(taskq_t *, taskqid_t);
 472 extern void     taskq_wait_outstanding(taskq_t *, taskqid_t);
 473 extern int      taskq_member(taskq_t *, kthread_t *);
 474 extern int      taskq_cancel_id(taskq_t *, taskqid_t);
 475 extern void     system_taskq_init(void);
 476 extern void     system_taskq_fini(void);
 477
 478 #define XVA_MAPSIZE     3
 479 #define XVA_MAGIC       0x78766174
 480
 481 /*
 482  * vnodes
 483  */
 484 typedef struct vnode {
 485         uint64_t        v_size;
 486         int             v_fd;
 487         char            *v_path;
 488         int             v_dump_fd;
 489 } vnode_t;
 490
 491 extern char *vn_dumpdir;
 492 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 493
 494 typedef struct xoptattr {
 495         timestruc_t     xoa_createtime; /* Create time of file */
 496         uint8_t         xoa_archive;
 497         uint8_t         xoa_system;
 498         uint8_t         xoa_readonly;
 499         uint8_t         xoa_hidden;
 500         uint8_t         xoa_nounlink;
 501         uint8_t         xoa_immutable;
 502         uint8_t         xoa_appendonly;
 503         uint8_t         xoa_nodump;
 504         uint8_t         xoa_settable;
 505         uint8_t         xoa_opaque;
 506         uint8_t         xoa_av_quarantined;
 507         uint8_t         xoa_av_modified;
 508         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 509         uint8_t         xoa_reparse;
 510         uint8_t         xoa_offline;
 511         uint8_t         xoa_sparse;
 512 } xoptattr_t;
 513
 514 typedef struct vattr {
 515         uint_t          va_mask;        /* bit-mask of attributes */
 516         u_offset_t      va_size;        /* file size in bytes */
 517 } vattr_t;
 518
 519
 520 typedef struct xvattr {
 521         vattr_t         xva_vattr;      /* Embedded vattr structure */
 522         uint32_t        xva_magic;      /* Magic Number */
 523         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 524         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 525         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 526         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 527         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 528 } xvattr_t;
 529
 530 typedef struct vsecattr {
 531         uint_t          vsa_mask;       /* See below */
 532         int             vsa_aclcnt;     /* ACL entry count */
 533         void            *vsa_aclentp;   /* pointer to ACL entries */
 534         int             vsa_dfaclcnt;   /* default ACL entry count */
 535         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 536         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 537 } vsecattr_t;
 538
 539 #define AT_TYPE         0x00001
 540 #define AT_MODE         0x00002
 541 #define AT_UID          0x00004
 542 #define AT_GID          0x00008
 543 #define AT_FSID         0x00010
 544 #define AT_NODEID       0x00020
 545 #define AT_NLINK        0x00040
 546 #define AT_SIZE         0x00080
 547 #define AT_ATIME        0x00100
 548 #define AT_MTIME        0x00200
 549 #define AT_CTIME        0x00400
 550 #define AT_RDEV         0x00800
 551 #define AT_BLKSIZE      0x01000
 552 #define AT_NBLOCKS      0x02000
 553 #define AT_SEQ          0x08000
 554 #define AT_XVATTR       0x10000
 555
 556 #define CRCREAT         0
 557
 558 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 559
 560 #define VOP_CLOSE(vp, f, c, o, cr, ct)  vn_close(vp)
 561 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 562 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 563
 564 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 565
 566 #define VN_RELE(vp)     vn_close(vp)
 567
 568 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 569     int x2, int x3);
 570 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 571     int x2, int x3, vnode_t *vp, int fd);
 572 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 573     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 574 extern void vn_close(vnode_t *vp);
 575
 576 #define vn_remove(path, x1, x2)         remove(path)
 577 #define vn_rename(from, to, seg)        rename((from), (to))
 578 #define vn_is_readonly(vp)              B_FALSE
 579
 580 extern vnode_t *rootdir;
 581
 582 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 583
 584 /*
 585  * Random stuff
 586  */
 587 #define ddi_get_lbolt()         (gethrtime() >> 23)
 588 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 589 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 590
 591 #define ddi_time_before(a, b)           (a < b)
 592 #define ddi_time_after(a, b)            ddi_time_before(b, a)
 593 #define ddi_time_before_eq(a, b)        (!ddi_time_after(a, b))
 594 #define ddi_time_after_eq(a, b)         ddi_time_before_eq(b, a)
 595
 596 #define ddi_time_before64(a, b)         (a < b)
 597 #define ddi_time_after64(a, b)          ddi_time_before64(b, a)
 598 #define ddi_time_before_eq64(a, b)      (!ddi_time_after64(a, b))
 599 #define ddi_time_after_eq64(a, b)       ddi_time_before_eq64(b, a)
 600
 601 extern void delay(clock_t ticks);
 602
 603 #define SEC_TO_TICK(sec)        ((sec) * hz)
 604 #define MSEC_TO_TICK(msec)      ((msec) / (MILLISEC / hz))
 605 #define USEC_TO_TICK(usec)      ((usec) / (MICROSEC / hz))
 606 #define NSEC_TO_TICK(usec)      ((usec) / (NANOSEC / hz))
 607
 608 #define gethrestime_sec() time(NULL)
 609 #define gethrestime(t) \
 610         do {\
 611                 (t)->tv_sec = gethrestime_sec();\
 612                 (t)->tv_nsec = 0;\
 613         } while (0);
 614
 615 #define max_ncpus       64
 616 #define boot_ncpus      (sysconf(_SC_NPROCESSORS_ONLN))
 617
 618 /*
 619  * Process priorities as defined by setpriority(2) and getpriority(2).
 620  */
 621 #define minclsyspri     19
 622 #define maxclsyspri     -20
 623 #define defclsyspri     0
 624
 625 #define CPU_SEQID       ((uintptr_t)pthread_self() & (max_ncpus - 1))
 626
 627 #define kcred           NULL
 628 #define CRED()          NULL
 629
 630 #define ptob(x)         ((x) * PAGESIZE)
 631
 632 #define NN_DIVISOR_1000 (1U << 0)
 633 #define NN_NUMBUF_SZ    (6)
 634
 635 extern uint64_t physmem;
 636 extern char *random_path;
 637 extern char *urandom_path;
 638
 639 extern int highbit64(uint64_t i);
 640 extern int lowbit64(uint64_t i);
 641 extern int random_get_bytes(uint8_t *ptr, size_t len);
 642 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 643
 644 extern void kernel_init(int);
 645 extern void kernel_fini(void);
 646 extern void random_init(void);
 647 extern void random_fini(void);
 648
 649 struct spa;
 650 extern void nicenum(uint64_t num, char *buf, size_t);
 651 extern void show_pool_stats(struct spa *);
 652 extern int set_global_var(char *arg);
 653
 654 typedef struct callb_cpr {
 655         kmutex_t        *cc_lockp;
 656 } callb_cpr_t;
 657
 658 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 659         (cp)->cc_lockp = lockp;                                 \
 660 }
 661
 662 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 663         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 664 }
 665
 666 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 667         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 668 }
 669
 670 #define CALLB_CPR_EXIT(cp) {                                    \
 671         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 672         mutex_exit((cp)->cc_lockp);                             \
 673 }
 674
 675 #define zone_dataset_visible(x, y)      (1)
 676 #define INGLOBALZONE(z)                 (1)
 677 extern uint32_t zone_get_hostid(void *zonep);
 678
 679 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 680 extern char *kmem_asprintf(const char *fmt, ...);
 681 #define strfree(str) kmem_free((str), strlen(str) + 1)
 682
 683 /*
 684  * Hostname information
 685  */
 686 extern char hw_serial[];        /* for userland-emulated hostid access */
 687 extern int ddi_strtoul(const char *str, char **nptr, int base,
 688     unsigned long *result);
 689
 690 extern int ddi_strtoull(const char *str, char **nptr, int base,
 691     u_longlong_t *result);
 692
 693 typedef struct utsname  utsname_t;
 694 extern utsname_t *utsname(void);
 695
 696 /* ZFS Boot Related stuff. */
 697
 698 struct _buf {
 699         intptr_t        _fd;
 700 };
 701
 702 struct bootstat {
 703         uint64_t st_size;
 704 };
 705
 706 typedef struct ace_object {
 707         uid_t           a_who;
 708         uint32_t        a_access_mask;
 709         uint16_t        a_flags;
 710         uint16_t        a_type;
 711         uint8_t         a_obj_type[16];
 712         uint8_t         a_inherit_obj_type[16];
 713 } ace_object_t;
 714
 715
 716 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 717 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 718 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 719 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 720
 721 extern struct _buf *kobj_open_file(char *name);
 722 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 723     unsigned off);
 724 extern void kobj_close_file(struct _buf *file);
 725 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 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 zoneid_t getzoneid(void);
 732
 733 /* SID stuff */
 734 typedef struct ksiddomain {
 735         uint_t  kd_ref;
 736         uint_t  kd_len;
 737         char    *kd_name;
 738 } ksiddomain_t;
 739
 740 ksiddomain_t *ksid_lookupdomain(const char *);
 741 void ksiddomain_rele(ksiddomain_t *);
 742
 743 #define DDI_SLEEP       KM_SLEEP
 744 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 745         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 746
 747 #define zfs_sleep_until(wakeup)                                         \
 748         do {                                                            \
 749                 hrtime_t delta = wakeup - gethrtime();                  \
 750                 struct timespec ts;                                     \
 751                 ts.tv_sec = delta / NANOSEC;                            \
 752                 ts.tv_nsec = delta % NANOSEC;                           \
 753                 (void) nanosleep(&ts, NULL);                            \
 754         } while (0)
 755
 756 typedef int fstrans_cookie_t;
 757
 758 extern fstrans_cookie_t spl_fstrans_mark(void);
 759 extern void spl_fstrans_unmark(fstrans_cookie_t);
 760 extern int __spl_pf_fstrans_check(void);
 761
 762 #endif /* _KERNEL */
 763 #endif  /* _SYS_ZFS_CONTEXT_H */