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/zfs_debug.h>
  63 #include <sys/fm/fs/zfs.h>
  64 #include <sys/sunddi.h>
  65 #include <sys/ctype.h>
  66 #include <sys/disp.h>
  67 #include <linux/dcache_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_SYSTM_H
  75 #define _SYS_T_LOCK_H
  76 #define _SYS_VNODE_H
  77 #define _SYS_VFS_H
  78 #define _SYS_SUNDDI_H
  79 #define _SYS_CALLB_H
  80
  81 #include <stdio.h>
  82 #include <stdlib.h>
  83 #include <stddef.h>
  84 #include <stdarg.h>
  85 #include <fcntl.h>
  86 #include <unistd.h>
  87 #include <errno.h>
  88 #include <string.h>
  89 #include <strings.h>
  90 #include <pthread.h>
  91 #include <assert.h>
  92 #include <alloca.h>
  93 #include <umem.h>
  94 #include <limits.h>
  95 #include <atomic.h>
  96 #include <dirent.h>
  97 #include <time.h>
  98 #include <ctype.h>
  99 #include <sys/note.h>
 100 #include <sys/types.h>
 101 #include <sys/cred.h>
 102 #include <sys/sysmacros.h>
 103 #include <sys/bitmap.h>
 104 #include <sys/resource.h>
 105 #include <sys/byteorder.h>
 106 #include <sys/list.h>
 107 #include <sys/uio.h>
 108 #include <sys/zfs_debug.h>
 109 #include <sys/sdt.h>
 110 #include <sys/kstat.h>
 111 #include <sys/u8_textprep.h>
 112 #include <sys/fm/fs/zfs.h>
 113 #include <sys/sunddi.h>
 114 #include <sys/debug.h>
 115
 116 /*
 117  * Stack
 118  */
 119
 120 #define  noinline       __attribute__((noinline))
 121
 122 /*
 123  * Debugging
 124  */
 125
 126 /*
 127  * Note that we are not using the debugging levels.
 128  */
 129
 130 #define CE_CONT         0       /* continuation         */
 131 #define CE_NOTE         1       /* notice               */
 132 #define CE_WARN         2       /* warning              */
 133 #define CE_PANIC        3       /* panic                */
 134 #define CE_IGNORE       4       /* print nothing        */
 135
 136 extern int aok;
 137
 138 /*
 139  * ZFS debugging
 140  */
 141
 142 extern void dprintf_setup(int *argc, char **argv);
 143 extern void __dprintf(const char *file, const char *func,
 144     int line, const char *fmt, ...);
 145 extern void cmn_err(int, const char *, ...);
 146 extern void vcmn_err(int, const char *, __va_list);
 147 extern void panic(const char *, ...);
 148 extern void vpanic(const char *, __va_list);
 149
 150 #define fm_panic        panic
 151
 152 /*
 153  * DTrace SDT probes have different signatures in userland than they do in
 154  * kernel.  If they're being used in kernel code, re-define them out of
 155  * existence for their counterparts in libzpool.
 156  */
 157
 158 #ifdef DTRACE_PROBE
 159 #undef  DTRACE_PROBE
 160 #define DTRACE_PROBE(a) ((void)0)
 161 #endif  /* DTRACE_PROBE */
 162
 163 #ifdef DTRACE_PROBE1
 164 #undef  DTRACE_PROBE1
 165 #define DTRACE_PROBE1(a, b, c)  ((void)0)
 166 #endif  /* DTRACE_PROBE1 */
 167
 168 #ifdef DTRACE_PROBE2
 169 #undef  DTRACE_PROBE2
 170 #define DTRACE_PROBE2(a, b, c, d, e)    ((void)0)
 171 #endif  /* DTRACE_PROBE2 */
 172
 173 #ifdef DTRACE_PROBE3
 174 #undef  DTRACE_PROBE3
 175 #define DTRACE_PROBE3(a, b, c, d, e, f, g)      ((void)0)
 176 #endif  /* DTRACE_PROBE3 */
 177
 178 #ifdef DTRACE_PROBE4
 179 #undef  DTRACE_PROBE4
 180 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)        ((void)0)
 181 #endif  /* DTRACE_PROBE4 */
 182
 183 /*
 184  * Threads
 185  */
 186 #define TS_MAGIC                0x72f158ab4261e538ull
 187 #define TS_RUN                  0x00000002
 188 #ifdef __linux__
 189 #define STACK_SIZE              8192    /* Linux x86 and amd64 */
 190 #else
 191 #define STACK_SIZE              24576   /* Solaris */
 192 #endif
 193
 194 /* in libzpool, p0 exists only to have its address taken */
 195 typedef struct proc {
 196         uintptr_t       this_is_never_used_dont_dereference_it;
 197 } proc_t;
 198
 199 extern struct proc p0;
 200 #define curproc         (&p0)
 201
 202 typedef void (*thread_func_t)(void *);
 203 typedef void (*thread_func_arg_t)(void *);
 204 typedef pthread_t kt_did_t;
 205
 206 typedef struct kthread {
 207         kt_did_t        t_tid;
 208         thread_func_t   t_func;
 209         void *          t_arg;
 210 } kthread_t;
 211
 212 #define curthread                       zk_thread_current()
 213 #define thread_exit                     zk_thread_exit
 214 #define thread_create(stk, stksize, func, arg, len, pp, state, pri)     \
 215         zk_thread_create(stk, stksize, (thread_func_t)func, arg,        \
 216                          len, NULL, state, pri, PTHREAD_CREATE_DETACHED)
 217 #define thread_join(t)                  zk_thread_join(t)
 218 #define newproc(f,a,cid,pri,ctp,pid)    (ENOSYS)
 219
 220 extern kthread_t *zk_thread_current(void);
 221 extern void zk_thread_exit(void);
 222 extern kthread_t *zk_thread_create(caddr_t stk, size_t  stksize,
 223         thread_func_t func, void *arg, size_t len,
 224         proc_t *pp, int state, pri_t pri, int detachstate);
 225 extern void zk_thread_join(kt_did_t tid);
 226
 227 #define kpreempt_disable()      ((void)0)
 228 #define kpreempt_enable()       ((void)0)
 229
 230 #define PS_NONE         -1
 231
 232 #define issig(why)      (FALSE)
 233 #define ISSIG(thr, why) (FALSE)
 234
 235 /*
 236  * Mutexes
 237  */
 238 #define MTX_MAGIC       0x9522f51362a6e326ull
 239 #define MTX_INIT        ((void *)NULL)
 240 #define MTX_DEST        ((void *)-1UL)
 241
 242 typedef struct kmutex {
 243         void            *m_owner;
 244         uint64_t        m_magic;
 245         pthread_mutex_t m_lock;
 246 } kmutex_t;
 247
 248 #define MUTEX_DEFAULT   0
 249 #define MUTEX_HELD(m)   ((m)->m_owner == curthread)
 250 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
 251
 252 extern void mutex_init(kmutex_t *mp, char *name, int type, void *cookie);
 253 extern void mutex_destroy(kmutex_t *mp);
 254 extern void mutex_enter(kmutex_t *mp);
 255 extern void mutex_exit(kmutex_t *mp);
 256 extern int mutex_tryenter(kmutex_t *mp);
 257 extern void *mutex_owner(kmutex_t *mp);
 258 extern int mutex_held(kmutex_t *mp);
 259
 260 /*
 261  * RW locks
 262  */
 263 #define RW_MAGIC        0x4d31fb123648e78aull
 264 #define RW_INIT         ((void *)NULL)
 265 #define RW_DEST         ((void *)-1UL)
 266
 267 typedef struct krwlock {
 268         void                    *rw_owner;
 269         void                    *rw_wr_owner;
 270         uint64_t                rw_magic;
 271         pthread_rwlock_t        rw_lock;
 272         uint_t                  rw_readers;
 273 } krwlock_t;
 274
 275 typedef int krw_t;
 276
 277 #define RW_READER       0
 278 #define RW_WRITER       1
 279 #define RW_DEFAULT      RW_READER
 280
 281 #define RW_READ_HELD(x)         ((x)->rw_readers > 0)
 282 #define RW_WRITE_HELD(x)        ((x)->rw_wr_owner == curthread)
 283 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 284
 285 #undef RW_LOCK_HELD
 286 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 287
 288 #undef RW_LOCK_HELD
 289 #define RW_LOCK_HELD(x)         (RW_READ_HELD(x) || RW_WRITE_HELD(x))
 290
 291 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
 292 extern void rw_destroy(krwlock_t *rwlp);
 293 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
 294 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
 295 extern int rw_tryupgrade(krwlock_t *rwlp);
 296 extern void rw_exit(krwlock_t *rwlp);
 297 #define rw_downgrade(rwlp) do { } while (0)
 298
 299 extern uid_t crgetuid(cred_t *cr);
 300 extern uid_t crgetruid(cred_t *cr);
 301 extern gid_t crgetgid(cred_t *cr);
 302 extern int crgetngroups(cred_t *cr);
 303 extern gid_t *crgetgroups(cred_t *cr);
 304
 305 /*
 306  * Condition variables
 307  */
 308 #define CV_MAGIC        0xd31ea9a83b1b30c4ull
 309
 310 typedef struct kcondvar {
 311         uint64_t                cv_magic;
 312         pthread_cond_t          cv;
 313 } kcondvar_t;
 314
 315 #define CV_DEFAULT      0
 316
 317 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
 318 extern void cv_destroy(kcondvar_t *cv);
 319 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
 320 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
 321 extern void cv_signal(kcondvar_t *cv);
 322 extern void cv_broadcast(kcondvar_t *cv);
 323 #define cv_timedwait_interruptible(cv, mp, at)  cv_timedwait(cv, mp, at)
 324 #define cv_wait_interruptible(cv, mp)           cv_wait(cv, mp)
 325 #define cv_wait_io(cv, mp)                      cv_wait(cv, mp)
 326
 327 /*
 328  * Thread-specific data
 329  */
 330 #define tsd_get(k) pthread_getspecific(k)
 331 #define tsd_set(k, v) pthread_setspecific(k, v)
 332 #define tsd_create(kp, d) pthread_key_create(kp, d)
 333 #define tsd_destroy(kp) /* nothing */
 334
 335 /*
 336  * Thread-specific data
 337  */
 338 #define tsd_get(k) pthread_getspecific(k)
 339 #define tsd_set(k, v) pthread_setspecific(k, v)
 340 #define tsd_create(kp, d) pthread_key_create(kp, d)
 341 #define tsd_destroy(kp) /* nothing */
 342
 343 /*
 344  * kstat creation, installation and deletion
 345  */
 346 extern kstat_t *kstat_create(char *, int,
 347     char *, char *, uchar_t, ulong_t, uchar_t);
 348 extern void kstat_install(kstat_t *);
 349 extern void kstat_delete(kstat_t *);
 350
 351 /*
 352  * Kernel memory
 353  */
 354 #define KM_SLEEP                UMEM_NOFAIL
 355 #define KM_PUSHPAGE             KM_SLEEP
 356 #define KM_NOSLEEP              UMEM_DEFAULT
 357 #define KM_NODEBUG              0x0
 358 #define KMC_NODEBUG             UMC_NODEBUG
 359 #define KMC_KMEM                0x0
 360 #define KMC_VMEM                0x0
 361 #define kmem_alloc(_s, _f)      umem_alloc(_s, _f)
 362 #define kmem_zalloc(_s, _f)     umem_zalloc(_s, _f)
 363 #define kmem_free(_b, _s)       umem_free(_b, _s)
 364 #define vmem_alloc(_s, _f)      kmem_alloc(_s, _f)
 365 #define vmem_zalloc(_s, _f)     kmem_zalloc(_s, _f)
 366 #define vmem_free(_b, _s)       kmem_free(_b, _s)
 367 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
 368         umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
 369 #define kmem_cache_destroy(_c)  umem_cache_destroy(_c)
 370 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
 371 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
 372 #define kmem_debugging()        0
 373 #define kmem_cache_reap_now(_c)         /* nothing */
 374 #define kmem_cache_set_move(_c, _cb)    /* nothing */
 375 #define POINTER_INVALIDATE(_pp)         /* nothing */
 376 #define POINTER_IS_VALID(_p)    0
 377
 378 typedef umem_cache_t kmem_cache_t;
 379
 380 typedef enum kmem_cbrc {
 381         KMEM_CBRC_YES,
 382         KMEM_CBRC_NO,
 383         KMEM_CBRC_LATER,
 384         KMEM_CBRC_DONT_NEED,
 385         KMEM_CBRC_DONT_KNOW
 386 } kmem_cbrc_t;
 387
 388 /*
 389  * Task queues
 390  */
 391 typedef struct taskq taskq_t;
 392 typedef uintptr_t taskqid_t;
 393 typedef void (task_func_t)(void *);
 394
 395 typedef struct taskq_ent {
 396         struct taskq_ent        *tqent_next;
 397         struct taskq_ent        *tqent_prev;
 398         task_func_t             *tqent_func;
 399         void                    *tqent_arg;
 400         uintptr_t               tqent_flags;
 401 } taskq_ent_t;
 402
 403 #define TQENT_FLAG_PREALLOC     0x1     /* taskq_dispatch_ent used */
 404
 405 #define TASKQ_PREPOPULATE       0x0001
 406 #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
 407 #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
 408 #define TASKQ_THREADS_CPU_PCT   0x0008  /* Scale # threads by # cpus */
 409 #define TASKQ_DC_BATCH          0x0010  /* Mark threads as batch */
 410
 411 #define TQ_SLEEP        KM_SLEEP        /* Can block for memory */
 412 #define TQ_NOSLEEP      KM_NOSLEEP      /* cannot block for memory; may fail */
 413 #define TQ_PUSHPAGE     KM_PUSHPAGE     /* Cannot perform I/O */
 414 #define TQ_NOQUEUE      0x02            /* Do not enqueue if can't dispatch */
 415 #define TQ_FRONT        0x08            /* Queue in front */
 416
 417 extern taskq_t *system_taskq;
 418
 419 extern taskq_t  *taskq_create(const char *, int, pri_t, int, int, uint_t);
 420 #define taskq_create_proc(a, b, c, d, e, p, f) \
 421             (taskq_create(a, b, c, d, e, f))
 422 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
 423             (taskq_create(a, b, maxclsyspri, d, e, f))
 424 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
 425 extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *, uint_t,
 426     clock_t);
 427 extern void     taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
 428     taskq_ent_t *);
 429 extern int      taskq_empty_ent(taskq_ent_t *);
 430 extern void     taskq_init_ent(taskq_ent_t *);
 431 extern void     taskq_destroy(taskq_t *);
 432 extern void     taskq_wait(taskq_t *);
 433 extern void     taskq_wait_id(taskq_t *, taskqid_t);
 434 extern int      taskq_member(taskq_t *, kthread_t *);
 435 extern int      taskq_cancel_id(taskq_t *, taskqid_t);
 436 extern void     system_taskq_init(void);
 437 extern void     system_taskq_fini(void);
 438
 439 #define XVA_MAPSIZE     3
 440 #define XVA_MAGIC       0x78766174
 441
 442 /*
 443  * vnodes
 444  */
 445 typedef struct vnode {
 446         uint64_t        v_size;
 447         int             v_fd;
 448         char            *v_path;
 449 } vnode_t;
 450
 451 #define AV_SCANSTAMP_SZ 32              /* length of anti-virus scanstamp */
 452
 453 typedef struct xoptattr {
 454         timestruc_t     xoa_createtime; /* Create time of file */
 455         uint8_t         xoa_archive;
 456         uint8_t         xoa_system;
 457         uint8_t         xoa_readonly;
 458         uint8_t         xoa_hidden;
 459         uint8_t         xoa_nounlink;
 460         uint8_t         xoa_immutable;
 461         uint8_t         xoa_appendonly;
 462         uint8_t         xoa_nodump;
 463         uint8_t         xoa_settable;
 464         uint8_t         xoa_opaque;
 465         uint8_t         xoa_av_quarantined;
 466         uint8_t         xoa_av_modified;
 467         uint8_t         xoa_av_scanstamp[AV_SCANSTAMP_SZ];
 468         uint8_t         xoa_reparse;
 469         uint8_t         xoa_offline;
 470         uint8_t         xoa_sparse;
 471 } xoptattr_t;
 472
 473 typedef struct vattr {
 474         uint_t          va_mask;        /* bit-mask of attributes */
 475         u_offset_t      va_size;        /* file size in bytes */
 476 } vattr_t;
 477
 478
 479 typedef struct xvattr {
 480         vattr_t         xva_vattr;      /* Embedded vattr structure */
 481         uint32_t        xva_magic;      /* Magic Number */
 482         uint32_t        xva_mapsize;    /* Size of attr bitmap (32-bit words) */
 483         uint32_t        *xva_rtnattrmapp;       /* Ptr to xva_rtnattrmap[] */
 484         uint32_t        xva_reqattrmap[XVA_MAPSIZE];    /* Requested attrs */
 485         uint32_t        xva_rtnattrmap[XVA_MAPSIZE];    /* Returned attrs */
 486         xoptattr_t      xva_xoptattrs;  /* Optional attributes */
 487 } xvattr_t;
 488
 489 typedef struct vsecattr {
 490         uint_t          vsa_mask;       /* See below */
 491         int             vsa_aclcnt;     /* ACL entry count */
 492         void            *vsa_aclentp;   /* pointer to ACL entries */
 493         int             vsa_dfaclcnt;   /* default ACL entry count */
 494         void            *vsa_dfaclentp; /* pointer to default ACL entries */
 495         size_t          vsa_aclentsz;   /* ACE size in bytes of vsa_aclentp */
 496 } vsecattr_t;
 497
 498 #define AT_TYPE         0x00001
 499 #define AT_MODE         0x00002
 500 #define AT_UID          0x00004
 501 #define AT_GID          0x00008
 502 #define AT_FSID         0x00010
 503 #define AT_NODEID       0x00020
 504 #define AT_NLINK        0x00040
 505 #define AT_SIZE         0x00080
 506 #define AT_ATIME        0x00100
 507 #define AT_MTIME        0x00200
 508 #define AT_CTIME        0x00400
 509 #define AT_RDEV         0x00800
 510 #define AT_BLKSIZE      0x01000
 511 #define AT_NBLOCKS      0x02000
 512 #define AT_SEQ          0x08000
 513 #define AT_XVATTR       0x10000
 514
 515 #define CRCREAT         0
 516
 517 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
 518
 519 #define VOP_CLOSE(vp, f, c, o, cr, ct)  vn_close(vp)
 520 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct)     0
 521 #define VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
 522
 523 #define VOP_FSYNC(vp, f, cr, ct)        fsync((vp)->v_fd)
 524
 525 #define VN_RELE(vp)     vn_close(vp)
 526
 527 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 528     int x2, int x3);
 529 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
 530     int x2, int x3, vnode_t *vp, int fd);
 531 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
 532     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
 533 extern void vn_close(vnode_t *vp);
 534
 535 #define vn_remove(path, x1, x2)         remove(path)
 536 #define vn_rename(from, to, seg)        rename((from), (to))
 537 #define vn_is_readonly(vp)              B_FALSE
 538
 539 extern vnode_t *rootdir;
 540
 541 #include <sys/file.h>           /* for FREAD, FWRITE, etc */
 542
 543 /*
 544  * Random stuff
 545  */
 546 #define ddi_get_lbolt()         (gethrtime() >> 23)
 547 #define ddi_get_lbolt64()       (gethrtime() >> 23)
 548 #define hz      119     /* frequency when using gethrtime() >> 23 for lbolt */
 549
 550 extern void delay(clock_t ticks);
 551
 552 #define SEC_TO_TICK(sec)        ((sec) * hz)
 553 #define MSEC_TO_TICK(msec)      ((msec) / (MILLISEC / hz))
 554 #define USEC_TO_TICK(usec)      ((usec) / (MICROSEC / hz))
 555 #define NSEC_TO_TICK(usec)      ((usec) / (NANOSEC / hz))
 556
 557 #define gethrestime_sec() time(NULL)
 558 #define gethrestime(t) \
 559         do {\
 560                 (t)->tv_sec = gethrestime_sec();\
 561                 (t)->tv_nsec = 0;\
 562         } while (0);
 563
 564 #define max_ncpus       64
 565
 566 #define minclsyspri     60
 567 #define maxclsyspri     99
 568
 569 #define CPU_SEQID       (pthread_self() & (max_ncpus - 1))
 570
 571 #define kcred           NULL
 572 #define CRED()          NULL
 573
 574 #define ptob(x)         ((x) * PAGESIZE)
 575
 576 extern uint64_t physmem;
 577
 578 extern int highbit(ulong_t i);
 579 extern int random_get_bytes(uint8_t *ptr, size_t len);
 580 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
 581
 582 extern void kernel_init(int);
 583 extern void kernel_fini(void);
 584
 585 struct spa;
 586 extern void nicenum(uint64_t num, char *buf);
 587 extern void show_pool_stats(struct spa *);
 588
 589 typedef struct callb_cpr {
 590         kmutex_t        *cc_lockp;
 591 } callb_cpr_t;
 592
 593 #define CALLB_CPR_INIT(cp, lockp, func, name)   {               \
 594         (cp)->cc_lockp = lockp;                                 \
 595 }
 596
 597 #define CALLB_CPR_SAFE_BEGIN(cp) {                              \
 598         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 599 }
 600
 601 #define CALLB_CPR_SAFE_END(cp, lockp) {                         \
 602         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 603 }
 604
 605 #define CALLB_CPR_EXIT(cp) {                                    \
 606         ASSERT(MUTEX_HELD((cp)->cc_lockp));                     \
 607         mutex_exit((cp)->cc_lockp);                             \
 608 }
 609
 610 #define zone_dataset_visible(x, y)      (1)
 611 #define INGLOBALZONE(z)                 (1)
 612
 613 extern char *kmem_vasprintf(const char *fmt, va_list adx);
 614 extern char *kmem_asprintf(const char *fmt, ...);
 615 #define strfree(str) kmem_free((str), strlen(str) + 1)
 616
 617 /*
 618  * Hostname information
 619  */
 620 extern char hw_serial[];        /* for userland-emulated hostid access */
 621 extern int ddi_strtoul(const char *str, char **nptr, int base,
 622     unsigned long *result);
 623
 624 extern int ddi_strtoull(const char *str, char **nptr, int base,
 625     u_longlong_t *result);
 626
 627 /* ZFS Boot Related stuff. */
 628
 629 struct _buf {
 630         intptr_t        _fd;
 631 };
 632
 633 struct bootstat {
 634         uint64_t st_size;
 635 };
 636
 637 typedef struct ace_object {
 638         uid_t           a_who;
 639         uint32_t        a_access_mask;
 640         uint16_t        a_flags;
 641         uint16_t        a_type;
 642         uint8_t         a_obj_type[16];
 643         uint8_t         a_inherit_obj_type[16];
 644 } ace_object_t;
 645
 646
 647 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE      0x05
 648 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE       0x06
 649 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE        0x07
 650 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE        0x08
 651
 652 extern struct _buf *kobj_open_file(char *name);
 653 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
 654     unsigned off);
 655 extern void kobj_close_file(struct _buf *file);
 656 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
 657 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
 658 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
 659     cred_t *cr);
 660 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 661 extern zoneid_t getzoneid(void);
 662
 663 /* SID stuff */
 664 typedef struct ksiddomain {
 665         uint_t  kd_ref;
 666         uint_t  kd_len;
 667         char    *kd_name;
 668 } ksiddomain_t;
 669
 670 ksiddomain_t *ksid_lookupdomain(const char *);
 671 void ksiddomain_rele(ksiddomain_t *);
 672
 673 #define DDI_SLEEP       KM_SLEEP
 674 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 675         sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
 676
 677 #endif /* _KERNEL */
 678
 679 #endif  /* _SYS_ZFS_CONTEXT_H */