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 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/taskq.h>
  45 #include <sys/buf.h>
  46 #include <sys/param.h>
  47 #include <sys/systm.h>
  48 #include <sys/cpuvar.h>
  49 #include <sys/kobj.h>
  50 #include <sys/conf.h>
  51 #include <sys/disp.h>
  52 #include <sys/debug.h>
  53 #include <sys/random.h>
  54 #include <sys/byteorder.h>
  55 #include <sys/systm.h>
  56 #include <sys/list.h>
  57 #include <sys/uio_impl.h>
  58 #include <sys/dirent.h>
  59 #include <sys/time.h>
  60 #include <vm/seg_kmem.h>
  61 #include <sys/zone.h>
  62 #include <sys/sdt.h>
  63 #include <sys/zfs_debug.h>
  64 #include <sys/fm/fs/zfs.h>
  65 #include <sys/sunddi.h>
  66 #include <sys/ctype.h>
  67 #include <sys/disp.h>
  68 #include <linux/dcache_compat.h>
  69
  70 #else /* _KERNEL */
  71
  72 #define _SYS_MUTEX_H
  73 #define _SYS_RWLOCK_H
  74 #define _SYS_CONDVAR_H
  75 #define _SYS_SYSTM_H
  76 #define _SYS_T_LOCK_H
  77 #define _SYS_VNODE_H
  78 #define _SYS_VFS_H
  79 #define _SYS_SUNDDI_H
  80 #define _SYS_CALLB_H
  81
  82 #include <stdio.h>
  83 #include <stdlib.h>
  84 #include <stddef.h>
  85 #include <stdarg.h>
  86 #include <fcntl.h>
  87 #include <unistd.h>
  88 #include <errno.h>
  89 #include <string.h>
  90 #include <strings.h>
  91 #include <pthread.h>
  92 #include <assert.h>
  93 #include <alloca.h>
  94 #include <umem.h>
  95 #include <limits.h>
  96 #include <atomic.h>
  97 #include <dirent.h>
  98 #include <time.h>
  99 #include <ctype.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/fm/fs/zfs.h>
 114 #include <sys/sunddi.h>
 115 #include <sys/debug.h>
 116
 117 /*
 118  * Stack
 119  */
 120
 121 #define noinline        __attribute__((noinline))
 122
 123 /*
 124  * Debugging
 125  */
 126
 127 /*
 128  * Note that we are not using the debugging levels.
 129  */
 130
 131 #define CE_CONT         0       /* continuation         */
 132 #define CE_NOTE         1       /* notice               */
 133 #define CE_WARN         2       /* warning              */
 134 #define CE_PANIC        3       /* panic                */
 135 #define CE_IGNORE       4       /* print nothing        */
 136
 137 extern int aok;
 138
 139 /*
 140  * ZFS debugging
 141  */
 142
 143 extern void dprintf_setup(int *argc, char **argv);
 144 extern void __dprintf(const char *file, const char *func,
 145     int line, const char *fmt, ...);
 146 extern void cmn_err(int, const char *, ...);
 147 extern void vcmn_err(int, const char *, __va_list);
 148 extern void panic(const char *, ...);
 149 extern void vpanic(const char *, __va_list);
 150
 151 #define fm_panic        panic
 152
 153 #ifdef __sun
 154 /*
 155  * DTrace SDT probes have different signatures in userland than they do in
 156  * kernel.  If they're being used in kernel code, re-define them out of
 157  * existence for their counterparts in libzpool.
 158  */
 159
 160 #ifdef DTRACE_PROBE
 161 #undef  DTRACE_PROBE
 162 #endif  /* DTRACE_PROBE */
 163 #define DTRACE_PROBE(a) \
 164         ZFS_PROBE0(#a)
 165
 166 #ifdef DTRACE_PROBE1
 167 #undef  DTRACE_PROBE1
 168 #endif  /* DTRACE_PROBE1 */
 169 #define DTRACE_PROBE1(a, b, c) \
 170         ZFS_PROBE1(#a, (unsigned long)c)
 171
 172 #ifdef DTRACE_PROBE2
 173 #undef  DTRACE_PROBE2
 174 #endif  /* DTRACE_PROBE2 */
 175 #define DTRACE_PROBE2(a, b, c, d, e) \
 176         ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
 177
 178 #ifdef DTRACE_PROBE3
 179 #undef  DTRACE_PROBE3
 180 #endif  /* DTRACE_PROBE3 */
 181 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
 182         ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
 183
 184 #ifdef DTRACE_PROBE4
 185 #undef  DTRACE_PROBE4
 186 #endif  /* DTRACE_PROBE4 */
 187 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
 188         ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
 189         (unsigned long)i)
 190
 191 /*
 192  * We use the comma operator so that this macro can be used without much
 193  * additional code.  For example, "return (EINVAL);" becomes
 194  * "return (SET_ERROR(EINVAL));".  Note that the argument will be evaluated
 195  * twice, so it should not have side effects (e.g. something like:
 196  * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
 197  */
 198 #define SET_ERROR(err) (ZFS_SET_ERROR(err), err)
 199 #else
 200 #define SET_ERROR(err) (err)
 201 #endif
 202 /*
 203  * Threads
 204  */
 205 #define TS_MAGIC                0x72f158ab4261e538ull
 206 #define TS_RUN                  0x00000002
 207 #ifdef __linux__
 208 #define STACK_SIZE              8192    /* Linux x86 and amd64 */
 209 #else
 210 #define STACK_SIZE              24576   /* Solaris */
 211 #endif
 212
 213 /* in libzpool, p0 exists only to have its address taken */
 214 typedef struct proc {
 215         uintptr_t       this_is_never_used_dont_dereference_it;
 216 } proc_t;
 217
 218 extern struct proc p0;
 219 #define curproc         (&p0)
 220
 221 typedef void (*thread_func_t)(void *);
 222 typedef void (*thread_func_arg_t)(void *);
 223 typedef pthread_t kt_did_t;
 224
 225 typedef struct kthread {
 226         kt_did_t        t_tid;
 227         thread_func_t   t_func;
 228         void *          t_arg;
 229 } kthread_t;
 230
 231 #define curthread                       zk_thread_current()
 232 #define getcomm()                       "unknown"
 233 #define thread_exit                     zk_thread_exit
 234 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 235         zk_thread_create(stk, stksize, (thread_func_t)func, arg,        \
 236             len, NULL, state, pri, PTHREAD_CREATE_DETACHED)
 237 #define thread_join(t)                  zk_thread_join(t)
 238 #define newproc(f, a, cid, pri, ctp, pid)       (ENOSYS)
 239
 240 extern kthread_t *zk_thread_current(void);
 241 extern void zk_thread_exit(void);
 242 extern kthread_t *zk_thread_create(caddr_t stk, size_t  stksize,
 243         thread_func_t func, void *arg, size_t len,
 244         proc_t *pp, int state, pri_t pri, int detachstate);
 245 extern void zk_thread_join(kt_did_t tid);
 246
 247 #define kpreempt_disable()      ((void)0)
 248 #define kpreempt_enable()       ((void)0)
 249
 250 #define PS_NONE         -1
 251
 252 #define issig(why)      (FALSE)
 253 #define ISSIG(thr, why) (FALSE)
 254
 255 /*
 256  * Mutexes
 257  */
 258 #define MTX_MAGIC       0x9522f51362a6e326ull
 259 #define MTX_INIT        ((void *)NULL)
 260 #define MTX_DEST        ((void *)-1UL)
 261
 262 typedef struct kmutex {
 263         void            *m_owner;
 264         uint64_t        m_magic;
 265         pthread_mutex_t m_lock;
 266 } kmutex_t;
 267
 268 #define MUTEX_DEFAULT   0
 269 #define MUTEX_HELD(m)   ((m)->m_owner == curthread)
 270 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 271
 272 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 273 extern void mutex_destroy(kmutex_t *mp);
 274 extern void mutex_enter(kmutex_t *mp);
 275 extern void mutex_exit(kmutex_t *mp);
 276 extern int mutex_tryenter(kmutex_t *mp);
 277 extern void *mutex_owner(kmutex_t *mp);
 278 extern int mutex_held(kmutex_t *mp);
 279
 280 /*
 281  * RW locks
 282  */
 283 #define RW_MAGIC        0x4d31fb123648e78aull
 284 #define RW_INIT         ((void *)NULL)
 285 #define RW_DEST         ((void *)-1UL)
 286
 287 typedef struct krwlock {
 288         void                    *rw_owner;
 289         void                    *rw_wr_owner;
 290         uint64_t                rw_magic;
 291         pthread_rwlock_t        rw_lock;
 292         uint_t                  rw_readers;
 293 } krwlock_t;
 294
 295 typedef int krw_t;
 296
 297 #define RW_READER       0
 298 #define RW_WRITER       1
 299 #define RW_DEFAULT      RW_READER
 300
 301 #define RW_READ_HELD(x)         ((x)->rw_readers > 0)
 302 #define RW_WRITE_HELD(x)        ((x)->rw_wr_owner == curthread)
 303 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 304
 305 #undef RW_LOCK_HELD
 306 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 307
 308 #undef RW_LOCK_HELD
 309 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 310
 311 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 312 extern void rw_destroy(krwlock_t *rwlp);
 313 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 314 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 315 extern int rw_tryupgrade(krwlock_t *rwlp);
 316 extern void rw_exit(krwlock_t *rwlp);
 317 #define rw_downgrade(rwlp) do { } while (0)
 318
 319 extern uid_t crgetuid(cred_t *cr);
 320 extern uid_t crgetruid(cred_t *cr);
 321 extern gid_t crgetgid(cred_t *cr);
 322 extern int crgetngroups(cred_t *cr);
 323 extern gid_t *crgetgroups(cred_t *cr);
 324
 325 /*
 326  * Condition variables
 327  */
 328 #define CV_MAGIC        0xd31ea9a83b1b30c4ull
 329
 330 typedef struct kcondvar {
 331         uint64_t                cv_magic;
 332         pthread_cond_t          cv;
 333 } kcondvar_t;
 334
 335 #define CV_DEFAULT      0
 336
 337 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 338 extern void cv_destroy(kcondvar_t *cv);
 339 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 340 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 341 extern void cv_signal(kcondvar_t *cv);
 342 extern void cv_broadcast(kcondvar_t *cv);
 343 #define cv_timedwait_interruptible(cv, mp, at)  cv_timedwait(cv, mp, at)
 344 #define cv_wait_interruptible(cv, mp)           cv_wait(cv, mp)
 345 #define cv_wait_io(cv, mp)                      cv_wait(cv, mp)
 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(kp, d)
 353 #define tsd_destroy(kp) /* nothing */
 354
 355 /*
 356  * Thread-specific data
 357  */
 358 #define tsd_get(k) pthread_getspecific(k)
 359 #define tsd_set(k, v) pthread_setspecific(k, v)
 360 #define tsd_create(kp, d) pthread_key_create(kp, d)
 361 #define tsd_destroy(kp) /* nothing */
 362
 363 /*
 364  * kstat creation, installation and deletion
 365  */
 366 extern kstat_t *kstat_create(const char *, int,
 367     const char *, const char *, uchar_t, ulong_t, uchar_t);
 368 extern void kstat_install(kstat_t *);
 369 extern void kstat_delete(kstat_t *);
 370 extern void kstat_waitq_enter(kstat_io_t *);
 371 extern void kstat_waitq_exit(kstat_io_t *);
 372 extern void kstat_runq_enter(kstat_io_t *);
 373 extern void kstat_runq_exit(kstat_io_t *);
 374 extern void kstat_waitq_to_runq(kstat_io_t *);
 375 extern void kstat_runq_back_to_waitq(kstat_io_t *);
 376 extern void kstat_set_raw_ops(kstat_t *ksp,
 377     int (*headers)(char *buf, size_t size),
 378     int (*data)(char *buf, size_t size, void *data),
 379     void *(*addr)(kstat_t *ksp, loff_t index));
 380
 381 /*
 382  * Kernel memory
 383  */
 384 #define KM_SLEEP                UMEM_NOFAIL
 385 #define KM_PUSHPAGE             KM_SLEEP
 386 #define KM_NOSLEEP              UMEM_DEFAULT
 387 #define KM_NODEBUG              0x0
 388 #define KMC_NODEBUG             UMC_NODEBUG
 389 #define KMC_KMEM                0x0
 390 #define KMC_VMEM                0x0
 391 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 392 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 393 #define kmem_free(_b, _s)       umem_free(_b, _s)
 394 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 395 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 396 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 397 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 398         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 399 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 400 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 401 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 402 #define kmem_debugging()        0
 403 #define kmem_cache_reap_now(_c)         /* nothing */
 404 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 405 #define POINTER_INVALIDATE(_pp)         /* nothing */
 406 #define POINTER_IS_VALID(_p)    0
 407
 408 typedef umem_cache_t kmem_cache_t;
 409
 410 typedef enum kmem_cbrc {
 411         KMEM_CBRC_YES,
 412         KMEM_CBRC_NO,
 413         KMEM_CBRC_LATER,
 414         KMEM_CBRC_DONT_NEED,
 415         KMEM_CBRC_DONT_KNOW
 416 } kmem_cbrc_t;
 417
 418 /*
 419  * Task queues
 420  */
 421 typedef struct taskq taskq_t;
 422 typedef uintptr_t taskqid_t;
 423 typedef void (task_func_t)(void *);
 424
 425 typedef struct taskq_ent {
 426         struct taskq_ent        *tqent_next;
 427         struct taskq_ent        *tqent_prev;
 428         task_func_t             *tqent_func;
 429         void                    *tqent_arg;
 430         uintptr_t               tqent_flags;
 431 } taskq_ent_t;
 432
 433 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 434
 435 #define TASKQ_PREPOPULATE       0x0001
 436 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 437 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 438 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 439 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 440
 441 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 442 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 443 #define TQ_PUSHPAGE     KM_PUSHPAGE     /* Cannot perform I/O */
 444 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 445 #define TQ_FRONT        0x08            /* Queue in front */
 446
 447 extern taskq_t *system_taskq;
 448
 449 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 450 #define taskq_create_proc(a, b, c, d, e, p, f) \
 451             (taskq_create(a, b, c, d, e, f))
 452 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 453             (taskq_create(a, b, maxclsyspri, d, e, f))
 454 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 455 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
 456     clock_t);
 457 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 458     taskq_ent_t *);
 459 extern int      taskq_empty_ent(taskq_ent_t *);
 460 extern void     taskq_init_ent(taskq_ent_t *);
 461 extern void     taskq_destroy(taskq_t *);
 462 extern void     taskq_wait(taskq_t *);
 463 extern void     taskq_wait_id(taskq_t *, taskqid_t);
 464 extern int      taskq_member(taskq_t *, kthread_t *);
 465 extern int      taskq_cancel_id(taskq_t *, taskqid_t);
 466 extern void     system_taskq_init(void);
 467 extern void     system_taskq_fini(void);
 468
 469 #define XVA_MAPSIZE     3
 470 #define XVA_MAGIC       0x78766174
 471
 472 /*
 473  * vnodes
 474  */
 475 typedef struct vnode {
 476         uint64_t        v_size;
 477         int             v_fd;
 478         char            *v_path;
 479 } vnode_t;
 480
 481 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 482
 483 typedef struct xoptattr {
 484         timestruc_t     xoa_createtime; /* Create time of file */
 485         uint8_t         xoa_archive;
 486         uint8_t         xoa_system;
 487         uint8_t         xoa_readonly;
 488         uint8_t         xoa_hidden;
 489         uint8_t         xoa_nounlink;
 490         uint8_t         xoa_immutable;
 491         uint8_t         xoa_appendonly;
 492         uint8_t         xoa_nodump;
 493         uint8_t         xoa_settable;
 494         uint8_t         xoa_opaque;
 495         uint8_t         xoa_av_quarantined;
 496         uint8_t         xoa_av_modified;
 497         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 498         uint8_t         xoa_reparse;
 499         uint8_t         xoa_offline;
 500         uint8_t         xoa_sparse;
 501 } xoptattr_t;
 502
 503 typedef struct vattr {
 504         uint_t          va_mask;        /* bit-mask of attributes */
 505         u_offset_t      va_size;        /* file size in bytes */
 506 } vattr_t;
 507
 508
 509 typedef struct xvattr {
 510         vattr_t         xva_vattr;      /* Embedded vattr structure */
 511         uint32_t        xva_magic;      /* Magic Number */
 512         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 513         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 514         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 515         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 516         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 517 } xvattr_t;
 518
 519 typedef struct vsecattr {
 520         uint_t          vsa_mask;       /* See below */
 521         int             vsa_aclcnt;     /* ACL entry count */
 522         void            *vsa_aclentp;   /* pointer to ACL entries */
 523         int             vsa_dfaclcnt;   /* default ACL entry count */
 524         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 525         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 526 } vsecattr_t;
 527
 528 #define AT_TYPE         0x00001
 529 #define AT_MODE         0x00002
 530 #define AT_UID          0x00004
 531 #define AT_GID          0x00008
 532 #define AT_FSID         0x00010
 533 #define AT_NODEID       0x00020
 534 #define AT_NLINK        0x00040
 535 #define AT_SIZE         0x00080
 536 #define AT_ATIME        0x00100
 537 #define AT_MTIME        0x00200
 538 #define AT_CTIME        0x00400
 539 #define AT_RDEV         0x00800
 540 #define AT_BLKSIZE      0x01000
 541 #define AT_NBLOCKS      0x02000
 542 #define AT_SEQ          0x08000
 543 #define AT_XVATTR       0x10000
 544
 545 #define CRCREAT         0
 546
 547 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 548
 549 #define VOP_CLOSE(vp, f, c, o, cr, ct)  vn_close(vp)
 550 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 551 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 552
 553 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 554
 555 #define VN_RELE(vp)     vn_close(vp)
 556
 557 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 558     int x2, int x3);
 559 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 560     int x2, int x3, vnode_t *vp, int fd);
 561 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 562     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 563 extern void vn_close(vnode_t *vp);
 564
 565 #define vn_remove(path, x1, x2)         remove(path)
 566 #define vn_rename(from, to, seg)        rename((from), (to))
 567 #define vn_is_readonly(vp)              B_FALSE
 568
 569 extern vnode_t *rootdir;
 570
 571 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 572
 573 /*
 574  * Random stuff
 575  */
 576 #define ddi_get_lbolt()         (gethrtime() >> 23)
 577 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 578 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 579
 580 extern void delay(clock_t ticks);
 581
 582 #define SEC_TO_TICK(sec)        ((sec) * hz)
 583 #define MSEC_TO_TICK(msec)      ((msec) / (MILLISEC / hz))
 584 #define USEC_TO_TICK(usec)      ((usec) / (MICROSEC / hz))
 585 #define NSEC_TO_TICK(usec)      ((usec) / (NANOSEC / hz))
 586
 587 #define gethrestime_sec() time(NULL)
 588 #define gethrestime(t) \
 589         do {\
 590                 (t)->tv_sec = gethrestime_sec();\
 591                 (t)->tv_nsec = 0;\
 592         } while (0);
 593
 594 #define max_ncpus       64
 595
 596 #define minclsyspri     60
 597 #define maxclsyspri     99
 598
 599 #define CPU_SEQID       (pthread_self() & (max_ncpus - 1))
 600
 601 #define kcred           NULL
 602 #define CRED()          NULL
 603
 604 #define ptob(x)         ((x) * PAGESIZE)
 605
 606 extern uint64_t physmem;
 607
 608 extern int highbit(ulong_t i);
 609 extern int random_get_bytes(uint8_t *ptr, size_t len);
 610 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 611
 612 extern void kernel_init(int);
 613 extern void kernel_fini(void);
 614
 615 struct spa;
 616 extern void nicenum(uint64_t num, char *buf);
 617 extern void show_pool_stats(struct spa *);
 618
 619 typedef struct callb_cpr {
 620         kmutex_t        *cc_lockp;
 621 } callb_cpr_t;
 622
 623 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 624         (cp)->cc_lockp = lockp;                                 \
 625 }
 626
 627 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 628         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 629 }
 630
 631 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 632         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 633 }
 634
 635 #define CALLB_CPR_EXIT(cp) {                                    \
 636         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 637         mutex_exit((cp)->cc_lockp);                             \
 638 }
 639
 640 #define zone_dataset_visible(x, y)      (1)
 641 #define INGLOBALZONE(z)                 (1)
 642
 643 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 644 extern char *kmem_asprintf(const char *fmt, ...);
 645 #define strfree(str) kmem_free((str), strlen(str) + 1)
 646
 647 /*
 648  * Hostname information
 649  */
 650 extern char hw_serial[];        /* for userland-emulated hostid access */
 651 extern int ddi_strtoul(const char *str, char **nptr, int base,
 652     unsigned long *result);
 653
 654 extern int ddi_strtoull(const char *str, char **nptr, int base,
 655     u_longlong_t *result);
 656
 657 /* ZFS Boot Related stuff. */
 658
 659 struct _buf {
 660         intptr_t        _fd;
 661 };
 662
 663 struct bootstat {
 664         uint64_t st_size;
 665 };
 666
 667 typedef struct ace_object {
 668         uid_t           a_who;
 669         uint32_t        a_access_mask;
 670         uint16_t        a_flags;
 671         uint16_t        a_type;
 672         uint8_t         a_obj_type[16];
 673         uint8_t         a_inherit_obj_type[16];
 674 } ace_object_t;
 675
 676
 677 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 678 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 679 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 680 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 681
 682 extern struct _buf *kobj_open_file(char *name);
 683 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 684     unsigned off);
 685 extern void kobj_close_file(struct _buf *file);
 686 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 687 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 688 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 689     cred_t *cr);
 690 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 691 extern zoneid_t getzoneid(void);
 692
 693 /* SID stuff */
 694 typedef struct ksiddomain {
 695         uint_t  kd_ref;
 696         uint_t  kd_len;
 697         char    *kd_name;
 698 } ksiddomain_t;
 699
 700 ksiddomain_t *ksid_lookupdomain(const char *);
 701 void ksiddomain_rele(ksiddomain_t *);
 702
 703 #define DDI_SLEEP       KM_SLEEP
 704 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 705         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 706
 707 #endif /* _KERNEL */
 708
 709 #endif  /* _SYS_ZFS_CONTEXT_H */