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) 2013 by Delphix. All rights reserved.
25 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
26 */
27
28 #ifndef _SYS_ZFS_CONTEXT_H
29 #define _SYS_ZFS_CONTEXT_H
30
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34
35 #define _SYS_MUTEX_H
36 #define _SYS_RWLOCK_H
37 #define _SYS_CONDVAR_H
38 #define _SYS_SYSTM_H
39 #define _SYS_T_LOCK_H
40 #define _SYS_VNODE_H
41 #define _SYS_VFS_H
42 #define _SYS_SUNDDI_H
43 #define _SYS_CALLB_H
44
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <stddef.h>
48 #include <stdarg.h>
49 #include <fcntl.h>
50 #include <unistd.h>
51 #include <errno.h>
52 #include <string.h>
53 #include <strings.h>
54 #include <synch.h>
55 #include <thread.h>
56 #include <assert.h>
57 #include <alloca.h>
58 #include <umem.h>
59 #include <limits.h>
60 #include <atomic.h>
61 #include <dirent.h>
62 #include <time.h>
63 #include <procfs.h>
64 #include <pthread.h>
65 #include <sys/debug.h>
66 #include <libsysevent.h>
67 #include <sys/note.h>
68 #include <sys/types.h>
69 #include <sys/cred.h>
70 #include <sys/sysmacros.h>
71 #include <sys/bitmap.h>
72 #include <sys/resource.h>
73 #include <sys/byteorder.h>
74 #include <sys/list.h>
75 #include <sys/uio.h>
76 #include <sys/zfs_debug.h>
77 #include <sys/sdt.h>
78 #include <sys/kstat.h>
79 #include <sys/u8_textprep.h>
80 #include <sys/sysevent/eventdefs.h>
81 #include <sys/sysevent/dev.h>
82 #include <sys/sunddi.h>
83 #include <sys/debug.h>
84 #include "zfs.h"
85
86 /*
87 * Debugging
88 */
89
90 /*
91 * Note that we are not using the debugging levels.
92 */
93
94 #define CE_CONT 0 /* continuation */
95 #define CE_NOTE 1 /* notice */
96 #define CE_WARN 2 /* warning */
97 #define CE_PANIC 3 /* panic */
98 #define CE_IGNORE 4 /* print nothing */
99
100 /*
101 * ZFS debugging
102 */
103
104 #ifdef ZFS_DEBUG
105 extern void dprintf_setup(int *argc, char **argv);
106 #endif /* ZFS_DEBUG */
107
108 extern void cmn_err(int, const char *, ...);
109 extern void vcmn_err(int, const char *, __va_list);
110 extern void panic(const char *, ...);
111 extern void vpanic(const char *, __va_list);
112
113 #define fm_panic panic
114
115 extern int aok;
116
117 /*
118 * DTrace SDT probes have different signatures in userland than they do in
119 * kernel. If they're being used in kernel code, re-define them out of
120 * existence for their counterparts in libzpool.
121 */
122
123 #ifdef DTRACE_PROBE
124 #undef DTRACE_PROBE
125 #endif /* DTRACE_PROBE */
126 #define DTRACE_PROBE(a) \
127 ZFS_PROBE0(#a)
128
129 #ifdef DTRACE_PROBE1
130 #undef DTRACE_PROBE1
131 #endif /* DTRACE_PROBE1 */
132 #define DTRACE_PROBE1(a, b, c) \
133 ZFS_PROBE1(#a, (unsigned long)c)
134
135 #ifdef DTRACE_PROBE2
136 #undef DTRACE_PROBE2
137 #endif /* DTRACE_PROBE2 */
138 #define DTRACE_PROBE2(a, b, c, d, e) \
139 ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
140
141 #ifdef DTRACE_PROBE3
142 #undef DTRACE_PROBE3
143 #endif /* DTRACE_PROBE3 */
144 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
145 ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
146
147 #ifdef DTRACE_PROBE4
148 #undef DTRACE_PROBE4
149 #endif /* DTRACE_PROBE4 */
150 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
151 ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
152 (unsigned long)i)
153
154 /*
155 * We use the comma operator so that this macro can be used without much
156 * additional code. For example, "return (EINVAL);" becomes
157 * "return (SET_ERROR(EINVAL));". Note that the argument will be evaluated
158 * twice, so it should not have side effects (e.g. something like:
159 * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
160 */
161 #define SET_ERROR(err) (ZFS_SET_ERROR(err), err)
162
163 /*
164 * Threads
165 */
166 #define curthread ((void *)(uintptr_t)thr_self())
167
168 typedef struct kthread kthread_t;
169
170 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \
171 zk_thread_create(func, arg)
172 #define thread_exit() thr_exit(NULL)
173 #define thread_join(t) panic("libzpool cannot join threads")
174
175 #define newproc(f, a, cid, pri, ctp, pid) (ENOSYS)
176
177 /* in libzpool, p0 exists only to have its address taken */
178 struct proc {
179 uintptr_t this_is_never_used_dont_dereference_it;
180 };
181
182 extern struct proc p0;
183 #define curproc (&p0)
184
185 #define PS_NONE -1
186
187 extern kthread_t *zk_thread_create(void (*func)(), void *arg);
188
189 #define issig(why) (FALSE)
190 #define ISSIG(thr, why) (FALSE)
191
192 /*
193 * Mutexes
194 */
195 typedef struct kmutex {
196 void *m_owner;
197 boolean_t initialized;
198 mutex_t m_lock;
199 } kmutex_t;
200
201 #define MUTEX_DEFAULT USYNC_THREAD
202 #undef MUTEX_HELD
203 #undef MUTEX_NOT_HELD
204 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock)
205 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
206
207 /*
208 * Argh -- we have to get cheesy here because the kernel and userland
209 * have different signatures for the same routine.
210 */
211 extern int _mutex_init(mutex_t *mp, int type, void *arg);
212 extern int _mutex_destroy(mutex_t *mp);
213
214 #define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp))
215 #define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp))
216
217 extern void zmutex_init(kmutex_t *mp);
218 extern void zmutex_destroy(kmutex_t *mp);
219 extern void mutex_enter(kmutex_t *mp);
220 extern void mutex_exit(kmutex_t *mp);
221 extern int mutex_tryenter(kmutex_t *mp);
222 extern void *mutex_owner(kmutex_t *mp);
223
224 /*
225 * RW locks
226 */
227 typedef struct krwlock {
228 void *rw_owner;
229 boolean_t initialized;
230 rwlock_t rw_lock;
231 } krwlock_t;
232
233 typedef int krw_t;
234
235 #define RW_READER 0
236 #define RW_WRITER 1
237 #define RW_DEFAULT USYNC_THREAD
238
239 #undef RW_READ_HELD
240 #define RW_READ_HELD(x) _rw_read_held(&(x)->rw_lock)
241
242 #undef RW_WRITE_HELD
243 #define RW_WRITE_HELD(x) _rw_write_held(&(x)->rw_lock)
244
245 #undef RW_LOCK_HELD
246 #define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x))
247
248 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
249 extern void rw_destroy(krwlock_t *rwlp);
250 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
251 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
252 extern int rw_tryupgrade(krwlock_t *rwlp);
253 extern void rw_exit(krwlock_t *rwlp);
254 #define rw_downgrade(rwlp) do { } while (0)
255
256 extern uid_t crgetuid(cred_t *cr);
257 extern uid_t crgetruid(cred_t *cr);
258 extern gid_t crgetgid(cred_t *cr);
259 extern int crgetngroups(cred_t *cr);
260 extern gid_t *crgetgroups(cred_t *cr);
261
262 /*
263 * Condition variables
264 */
265 typedef cond_t kcondvar_t;
266
267 #define CV_DEFAULT USYNC_THREAD
268
269 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
270 extern void cv_destroy(kcondvar_t *cv);
271 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
272 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
273 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
274 hrtime_t res, int flag);
275 extern void cv_signal(kcondvar_t *cv);
276 extern void cv_broadcast(kcondvar_t *cv);
277
278 /*
279 * Thread-specific data
280 */
281 #define tsd_get(k) pthread_getspecific(k)
282 #define tsd_set(k, v) pthread_setspecific(k, v)
283 #define tsd_create(kp, d) pthread_key_create(kp, d)
284 #define tsd_destroy(kp) /* nothing */
285
286 /*
287 * kstat creation, installation and deletion
288 */
289 extern kstat_t *kstat_create(const char *, int,
290 const char *, const char *, uchar_t, ulong_t, uchar_t);
291 extern void kstat_install(kstat_t *);
292 extern void kstat_delete(kstat_t *);
293 extern void kstat_waitq_enter(kstat_io_t *);
294 extern void kstat_waitq_exit(kstat_io_t *);
295 extern void kstat_runq_enter(kstat_io_t *);
296 extern void kstat_runq_exit(kstat_io_t *);
297 extern void kstat_waitq_to_runq(kstat_io_t *);
298 extern void kstat_runq_back_to_waitq(kstat_io_t *);
299
300 /*
301 * Kernel memory
302 */
303 #define KM_SLEEP UMEM_NOFAIL
304 #define KM_PUSHPAGE KM_SLEEP
305 #define KM_NOSLEEP UMEM_DEFAULT
306 #define KMC_NODEBUG UMC_NODEBUG
307 #define KMC_NOTOUCH 0 /* not needed for userland caches */
308 #define kmem_alloc(_s, _f) umem_alloc(_s, _f)
309 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f)
310 #define kmem_free(_b, _s) umem_free(_b, _s)
311 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
312 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
313 #define kmem_cache_destroy(_c) umem_cache_destroy(_c)
314 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
315 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
316 #define kmem_debugging() 0
317 #define kmem_cache_reap_now(_c) /* nothing */
318 #define kmem_cache_set_move(_c, _cb) /* nothing */
319 #define vmem_qcache_reap(_v) /* nothing */
320 #define POINTER_INVALIDATE(_pp) /* nothing */
321 #define POINTER_IS_VALID(_p) 0
322
323 extern vmem_t *zio_arena;
324
325 typedef umem_cache_t kmem_cache_t;
326
327 typedef enum kmem_cbrc {
328 KMEM_CBRC_YES,
329 KMEM_CBRC_NO,
330 KMEM_CBRC_LATER,
331 KMEM_CBRC_DONT_NEED,
332 KMEM_CBRC_DONT_KNOW
333 } kmem_cbrc_t;
334
335 /*
336 * Task queues
337 */
338 typedef struct taskq taskq_t;
339 typedef uintptr_t taskqid_t;
340 typedef void (task_func_t)(void *);
341
342 typedef struct taskq_ent {
343 struct taskq_ent *tqent_next;
344 struct taskq_ent *tqent_prev;
345 task_func_t *tqent_func;
346 void *tqent_arg;
347 uintptr_t tqent_flags;
348 } taskq_ent_t;
349
350 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */
351
352 #define TASKQ_PREPOPULATE 0x0001
353 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */
354 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */
355 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */
356 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */
357
358 #define TQ_SLEEP KM_SLEEP /* Can block for memory */
359 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */
360 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */
361 #define TQ_FRONT 0x08 /* Queue in front */
362
363
364 extern taskq_t *system_taskq;
365
366 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t);
367 #define taskq_create_proc(a, b, c, d, e, p, f) \
368 (taskq_create(a, b, c, d, e, f))
369 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
370 (taskq_create(a, b, maxclsyspri, d, e, f))
371 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
372 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
373 taskq_ent_t *);
374 extern void taskq_destroy(taskq_t *);
375 extern void taskq_wait(taskq_t *);
376 extern int taskq_member(taskq_t *, void *);
377 extern void system_taskq_init(void);
378 extern void system_taskq_fini(void);
379
380 #define XVA_MAPSIZE 3
381 #define XVA_MAGIC 0x78766174
382
383 /*
384 * vnodes
385 */
386 typedef struct vnode {
387 uint64_t v_size;
388 int v_fd;
389 char *v_path;
390 } vnode_t;
391
392 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */
393
394 typedef struct xoptattr {
395 timestruc_t xoa_createtime; /* Create time of file */
396 uint8_t xoa_archive;
397 uint8_t xoa_system;
398 uint8_t xoa_readonly;
399 uint8_t xoa_hidden;
400 uint8_t xoa_nounlink;
401 uint8_t xoa_immutable;
402 uint8_t xoa_appendonly;
403 uint8_t xoa_nodump;
404 uint8_t xoa_settable;
405 uint8_t xoa_opaque;
406 uint8_t xoa_av_quarantined;
407 uint8_t xoa_av_modified;
408 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ];
409 uint8_t xoa_reparse;
410 uint8_t xoa_offline;
411 uint8_t xoa_sparse;
412 } xoptattr_t;
413
414 typedef struct vattr {
415 uint_t va_mask; /* bit-mask of attributes */
416 u_offset_t va_size; /* file size in bytes */
417 } vattr_t;
418
419
420 typedef struct xvattr {
421 vattr_t xva_vattr; /* Embedded vattr structure */
422 uint32_t xva_magic; /* Magic Number */
423 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */
424 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */
425 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */
426 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */
427 xoptattr_t xva_xoptattrs; /* Optional attributes */
428 } xvattr_t;
429
430 typedef struct vsecattr {
431 uint_t vsa_mask; /* See below */
432 int vsa_aclcnt; /* ACL entry count */
433 void *vsa_aclentp; /* pointer to ACL entries */
434 int vsa_dfaclcnt; /* default ACL entry count */
435 void *vsa_dfaclentp; /* pointer to default ACL entries */
436 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */
437 } vsecattr_t;
438
439 #define AT_TYPE 0x00001
440 #define AT_MODE 0x00002
441 #define AT_UID 0x00004
442 #define AT_GID 0x00008
443 #define AT_FSID 0x00010
444 #define AT_NODEID 0x00020
445 #define AT_NLINK 0x00040
446 #define AT_SIZE 0x00080
447 #define AT_ATIME 0x00100
448 #define AT_MTIME 0x00200
449 #define AT_CTIME 0x00400
450 #define AT_RDEV 0x00800
451 #define AT_BLKSIZE 0x01000
452 #define AT_NBLOCKS 0x02000
453 #define AT_SEQ 0x08000
454 #define AT_XVATTR 0x10000
455
456 #define CRCREAT 0
457
458 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
459
460 #define VOP_CLOSE(vp, f, c, o, cr, ct) 0
461 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct) 0
462 #define VOP_GETATTR(vp, vap, fl, cr, ct) fop_getattr((vp), (vap));
463
464 #define VOP_FSYNC(vp, f, cr, ct) fsync((vp)->v_fd)
465
466 #define VN_RELE(vp) vn_close(vp)
467
468 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
469 int x2, int x3);
470 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
471 int x2, int x3, vnode_t *vp, int fd);
472 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
473 offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
474 extern void vn_close(vnode_t *vp);
475
476 #define vn_remove(path, x1, x2) remove(path)
477 #define vn_rename(from, to, seg) rename((from), (to))
478 #define vn_is_readonly(vp) B_FALSE
479
480 extern vnode_t *rootdir;
481
482 #include <sys/file.h> /* for FREAD, FWRITE, etc */
483
484 /*
485 * Random stuff
486 */
487 #define ddi_get_lbolt() (gethrtime() >> 23)
488 #define ddi_get_lbolt64() (gethrtime() >> 23)
489 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */
490
491 extern void delay(clock_t ticks);
492
493 #define SEC_TO_TICK(sec) ((sec) * hz)
494 #define NSEC_TO_TICK(usec) ((usec) / (NANOSEC / hz))
495
496 #define gethrestime_sec() time(NULL)
497 #define gethrestime(t) \
498 do {\
499 (t)->tv_sec = gethrestime_sec();\
500 (t)->tv_nsec = 0;\
501 } while (0);
502
503 #define max_ncpus 64
504
505 #define minclsyspri 60
506 #define maxclsyspri 99
507
508 #define CPU_SEQID (thr_self() & (max_ncpus - 1))
509
510 #define kcred NULL
511 #define CRED() NULL
512
513 #define ptob(x) ((x) * PAGESIZE)
514
515 extern uint64_t physmem;
516
517 extern int highbit(ulong_t i);
518 extern int random_get_bytes(uint8_t *ptr, size_t len);
519 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
520
521 extern void kernel_init(int);
522 extern void kernel_fini(void);
523
524 struct spa;
525 extern void nicenum(uint64_t num, char *buf);
526 extern void show_pool_stats(struct spa *);
527
528 typedef struct callb_cpr {
529 kmutex_t *cc_lockp;
530 } callb_cpr_t;
531
532 #define CALLB_CPR_INIT(cp, lockp, func, name) { \
533 (cp)->cc_lockp = lockp; \
534 }
535
536 #define CALLB_CPR_SAFE_BEGIN(cp) { \
537 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
538 }
539
540 #define CALLB_CPR_SAFE_END(cp, lockp) { \
541 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
542 }
543
544 #define CALLB_CPR_EXIT(cp) { \
545 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
546 mutex_exit((cp)->cc_lockp); \
547 }
548
549 #define zone_dataset_visible(x, y) (1)
550 #define INGLOBALZONE(z) (1)
551
552 extern char *kmem_asprintf(const char *fmt, ...);
553 #define strfree(str) kmem_free((str), strlen(str) + 1)
554
555 /*
556 * Hostname information
557 */
558 extern char hw_serial[]; /* for userland-emulated hostid access */
559 extern int ddi_strtoul(const char *str, char **nptr, int base,
560 unsigned long *result);
561
562 extern int ddi_strtoull(const char *str, char **nptr, int base,
563 u_longlong_t *result);
564
565 /* ZFS Boot Related stuff. */
566
567 struct _buf {
568 intptr_t _fd;
569 };
570
571 struct bootstat {
572 uint64_t st_size;
573 };
574
575 typedef struct ace_object {
576 uid_t a_who;
577 uint32_t a_access_mask;
578 uint16_t a_flags;
579 uint16_t a_type;
580 uint8_t a_obj_type[16];
581 uint8_t a_inherit_obj_type[16];
582 } ace_object_t;
583
584
585 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05
586 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06
587 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07
588 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08
589
590 extern struct _buf *kobj_open_file(char *name);
591 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
592 unsigned off);
593 extern void kobj_close_file(struct _buf *file);
594 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
595 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
596 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
597 cred_t *cr);
598 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
599 extern zoneid_t getzoneid(void);
600
601 /* SID stuff */
602 typedef struct ksiddomain {
603 uint_t kd_ref;
604 uint_t kd_len;
605 char *kd_name;
606 } ksiddomain_t;
607
608 ksiddomain_t *ksid_lookupdomain(const char *);
609 void ksiddomain_rele(ksiddomain_t *);
610
611 #define DDI_SLEEP KM_SLEEP
612 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
613 sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
614
615 /*
616 * Cyclic information
617 */
618 extern kmutex_t cpu_lock;
619
620 typedef uintptr_t cyclic_id_t;
621 typedef uint16_t cyc_level_t;
622 typedef void (*cyc_func_t)(void *);
623
624 #define CY_LOW_LEVEL 0
625 #define CY_INFINITY INT64_MAX
626 #define CYCLIC_NONE ((cyclic_id_t)0)
627
628 typedef struct cyc_time {
629 hrtime_t cyt_when;
630 hrtime_t cyt_interval;
631 } cyc_time_t;
632
633 typedef struct cyc_handler {
634 cyc_func_t cyh_func;
635 void *cyh_arg;
636 cyc_level_t cyh_level;
637 } cyc_handler_t;
638
639 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
640 extern void cyclic_remove(cyclic_id_t);
641 extern int cyclic_reprogram(cyclic_id_t, hrtime_t);
642
643 /*
644 * Buf structure
645 */
646 #define B_BUSY 0x0001
647 #define B_DONE 0x0002
648 #define B_ERROR 0x0004
649 #define B_READ 0x0040 /* read when I/O occurs */
650 #define B_WRITE 0x0100 /* non-read pseudo-flag */
651
652 typedef struct buf {
653 int b_flags;
654 size_t b_bcount;
655 union {
656 caddr_t b_addr;
657 } b_un;
658
659 lldaddr_t _b_blkno;
660 #define b_lblkno _b_blkno._f
661 size_t b_resid;
662 size_t b_bufsize;
663 int (*b_iodone)(struct buf *);
664 int b_error;
665 void *b_private;
666 } buf_t;
667
668 extern void bioinit(buf_t *);
669 extern void biodone(buf_t *);
670 extern void bioerror(buf_t *, int);
671 extern int geterror(buf_t *);
672
673 #ifdef __cplusplus
674 }
675 #endif
676
677 #endif /* _SYS_ZFS_CONTEXT_H */