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 #define kpreempt(x) yield()
169
170 typedef struct kthread kthread_t;
171
172 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \
173 zk_thread_create(func, arg)
174 #define thread_exit() thr_exit(NULL)
175 #define thread_join(t) panic("libzpool cannot join threads")
176
177 #define newproc(f, a, cid, pri, ctp, pid) (ENOSYS)
178
179 /* in libzpool, p0 exists only to have its address taken */
180 struct proc {
181 uintptr_t this_is_never_used_dont_dereference_it;
182 };
183
184 extern struct proc p0;
185 #define curproc (&p0)
186
187 #define PS_NONE -1
188
189 extern kthread_t *zk_thread_create(void (*func)(), void *arg);
190
191 #define issig(why) (FALSE)
192 #define ISSIG(thr, why) (FALSE)
193
194 /*
195 * Mutexes
196 */
197 typedef struct kmutex {
198 void *m_owner;
199 boolean_t initialized;
200 mutex_t m_lock;
201 } kmutex_t;
202
203 #define MUTEX_DEFAULT USYNC_THREAD
204 #undef MUTEX_HELD
205 #undef MUTEX_NOT_HELD
206 #define MUTEX_HELD(m) _mutex_held(&(m)->m_lock)
207 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
208
209 /*
210 * Argh -- we have to get cheesy here because the kernel and userland
211 * have different signatures for the same routine.
212 */
213 extern int _mutex_init(mutex_t *mp, int type, void *arg);
214 extern int _mutex_destroy(mutex_t *mp);
215
216 #define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp))
217 #define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp))
218
219 extern void zmutex_init(kmutex_t *mp);
220 extern void zmutex_destroy(kmutex_t *mp);
221 extern void mutex_enter(kmutex_t *mp);
222 extern void mutex_exit(kmutex_t *mp);
223 extern int mutex_tryenter(kmutex_t *mp);
224 extern void *mutex_owner(kmutex_t *mp);
225
226 /*
227 * RW locks
228 */
229 typedef struct krwlock {
230 void *rw_owner;
231 boolean_t initialized;
232 rwlock_t rw_lock;
233 } krwlock_t;
234
235 typedef int krw_t;
236
237 #define RW_READER 0
238 #define RW_WRITER 1
239 #define RW_DEFAULT USYNC_THREAD
240
241 #undef RW_READ_HELD
242 #define RW_READ_HELD(x) _rw_read_held(&(x)->rw_lock)
243
244 #undef RW_WRITE_HELD
245 #define RW_WRITE_HELD(x) _rw_write_held(&(x)->rw_lock)
246
247 #undef RW_LOCK_HELD
248 #define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x))
249
250 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
251 extern void rw_destroy(krwlock_t *rwlp);
252 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
253 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
254 extern int rw_tryupgrade(krwlock_t *rwlp);
255 extern void rw_exit(krwlock_t *rwlp);
256 #define rw_downgrade(rwlp) do { } while (0)
257
258 extern uid_t crgetuid(cred_t *cr);
259 extern uid_t crgetruid(cred_t *cr);
260 extern gid_t crgetgid(cred_t *cr);
261 extern int crgetngroups(cred_t *cr);
262 extern gid_t *crgetgroups(cred_t *cr);
263
264 /*
265 * Condition variables
266 */
267 typedef cond_t kcondvar_t;
268
269 #define CV_DEFAULT USYNC_THREAD
270
271 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
272 extern void cv_destroy(kcondvar_t *cv);
273 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
274 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
275 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
276 hrtime_t res, int flag);
277 extern void cv_signal(kcondvar_t *cv);
278 extern void cv_broadcast(kcondvar_t *cv);
279
280 /*
281 * Thread-specific data
282 */
283 #define tsd_get(k) pthread_getspecific(k)
284 #define tsd_set(k, v) pthread_setspecific(k, v)
285 #define tsd_create(kp, d) pthread_key_create(kp, d)
286 #define tsd_destroy(kp) /* nothing */
287
288 /*
289 * kstat creation, installation and deletion
290 */
291 extern kstat_t *kstat_create(const char *, int,
292 const char *, const char *, uchar_t, ulong_t, uchar_t);
293 extern void kstat_install(kstat_t *);
294 extern void kstat_delete(kstat_t *);
295 extern void kstat_waitq_enter(kstat_io_t *);
296 extern void kstat_waitq_exit(kstat_io_t *);
297 extern void kstat_runq_enter(kstat_io_t *);
298 extern void kstat_runq_exit(kstat_io_t *);
299 extern void kstat_waitq_to_runq(kstat_io_t *);
300 extern void kstat_runq_back_to_waitq(kstat_io_t *);
301
302 /*
303 * Kernel memory
304 */
305 #define KM_SLEEP UMEM_NOFAIL
306 #define KM_PUSHPAGE KM_SLEEP
307 #define KM_NOSLEEP UMEM_DEFAULT
308 #define KMC_NODEBUG UMC_NODEBUG
309 #define KMC_NOTOUCH 0 /* not needed for userland caches */
310 #define kmem_alloc(_s, _f) umem_alloc(_s, _f)
311 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f)
312 #define kmem_free(_b, _s) umem_free(_b, _s)
313 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
314 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
315 #define kmem_cache_destroy(_c) umem_cache_destroy(_c)
316 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
317 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
318 #define kmem_debugging() 0
319 #define kmem_cache_reap_now(_c) /* nothing */
320 #define kmem_cache_set_move(_c, _cb) /* nothing */
321 #define vmem_qcache_reap(_v) /* nothing */
322 #define POINTER_INVALIDATE(_pp) /* nothing */
323 #define POINTER_IS_VALID(_p) 0
324
325 extern vmem_t *zio_arena;
326
327 typedef umem_cache_t kmem_cache_t;
328
329 typedef enum kmem_cbrc {
330 KMEM_CBRC_YES,
331 KMEM_CBRC_NO,
332 KMEM_CBRC_LATER,
333 KMEM_CBRC_DONT_NEED,
334 KMEM_CBRC_DONT_KNOW
335 } kmem_cbrc_t;
336
337 /*
338 * Task queues
339 */
340 typedef struct taskq taskq_t;
341 typedef uintptr_t taskqid_t;
342 typedef void (task_func_t)(void *);
343
344 typedef struct taskq_ent {
345 struct taskq_ent *tqent_next;
346 struct taskq_ent *tqent_prev;
347 task_func_t *tqent_func;
348 void *tqent_arg;
349 uintptr_t tqent_flags;
350 } taskq_ent_t;
351
352 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */
353
354 #define TASKQ_PREPOPULATE 0x0001
355 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */
356 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */
357 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */
358 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */
359
360 #define TQ_SLEEP KM_SLEEP /* Can block for memory */
361 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */
362 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */
363 #define TQ_FRONT 0x08 /* Queue in front */
364
365
366 extern taskq_t *system_taskq;
367
368 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t);
369 #define taskq_create_proc(a, b, c, d, e, p, f) \
370 (taskq_create(a, b, c, d, e, f))
371 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
372 (taskq_create(a, b, maxclsyspri, d, e, f))
373 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
374 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
375 taskq_ent_t *);
376 extern void taskq_destroy(taskq_t *);
377 extern void taskq_wait(taskq_t *);
378 extern int taskq_member(taskq_t *, void *);
379 extern void system_taskq_init(void);
380 extern void system_taskq_fini(void);
381
382 #define XVA_MAPSIZE 3
383 #define XVA_MAGIC 0x78766174
384
385 /*
386 * vnodes
387 */
388 typedef struct vnode {
389 uint64_t v_size;
390 int v_fd;
391 char *v_path;
392 } vnode_t;
393
394 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */
395
396 typedef struct xoptattr {
397 timestruc_t xoa_createtime; /* Create time of file */
398 uint8_t xoa_archive;
399 uint8_t xoa_system;
400 uint8_t xoa_readonly;
401 uint8_t xoa_hidden;
402 uint8_t xoa_nounlink;
403 uint8_t xoa_immutable;
404 uint8_t xoa_appendonly;
405 uint8_t xoa_nodump;
406 uint8_t xoa_settable;
407 uint8_t xoa_opaque;
408 uint8_t xoa_av_quarantined;
409 uint8_t xoa_av_modified;
410 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ];
411 uint8_t xoa_reparse;
412 uint8_t xoa_offline;
413 uint8_t xoa_sparse;
414 } xoptattr_t;
415
416 typedef struct vattr {
417 uint_t va_mask; /* bit-mask of attributes */
418 u_offset_t va_size; /* file size in bytes */
419 } vattr_t;
420
421
422 typedef struct xvattr {
423 vattr_t xva_vattr; /* Embedded vattr structure */
424 uint32_t xva_magic; /* Magic Number */
425 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */
426 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */
427 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */
428 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */
429 xoptattr_t xva_xoptattrs; /* Optional attributes */
430 } xvattr_t;
431
432 typedef struct vsecattr {
433 uint_t vsa_mask; /* See below */
434 int vsa_aclcnt; /* ACL entry count */
435 void *vsa_aclentp; /* pointer to ACL entries */
436 int vsa_dfaclcnt; /* default ACL entry count */
437 void *vsa_dfaclentp; /* pointer to default ACL entries */
438 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */
439 } vsecattr_t;
440
441 #define AT_TYPE 0x00001
442 #define AT_MODE 0x00002
443 #define AT_UID 0x00004
444 #define AT_GID 0x00008
445 #define AT_FSID 0x00010
446 #define AT_NODEID 0x00020
447 #define AT_NLINK 0x00040
448 #define AT_SIZE 0x00080
449 #define AT_ATIME 0x00100
450 #define AT_MTIME 0x00200
451 #define AT_CTIME 0x00400
452 #define AT_RDEV 0x00800
453 #define AT_BLKSIZE 0x01000
454 #define AT_NBLOCKS 0x02000
455 #define AT_SEQ 0x08000
456 #define AT_XVATTR 0x10000
457
458 #define CRCREAT 0
459
460 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
461
462 #define VOP_CLOSE(vp, f, c, o, cr, ct) 0
463 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct) 0
464 #define VOP_GETATTR(vp, vap, fl, cr, ct) fop_getattr((vp), (vap));
465
466 #define VOP_FSYNC(vp, f, cr, ct) fsync((vp)->v_fd)
467
468 #define VN_RELE(vp) vn_close(vp)
469
470 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
471 int x2, int x3);
472 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
473 int x2, int x3, vnode_t *vp, int fd);
474 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
475 offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
476 extern void vn_close(vnode_t *vp);
477
478 #define vn_remove(path, x1, x2) remove(path)
479 #define vn_rename(from, to, seg) rename((from), (to))
480 #define vn_is_readonly(vp) B_FALSE
481
482 extern vnode_t *rootdir;
483
484 #include <sys/file.h> /* for FREAD, FWRITE, etc */
485
486 /*
487 * Random stuff
488 */
489 #define ddi_get_lbolt() (gethrtime() >> 23)
490 #define ddi_get_lbolt64() (gethrtime() >> 23)
491 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */
492
493 extern void delay(clock_t ticks);
494
495 #define SEC_TO_TICK(sec) ((sec) * hz)
496 #define NSEC_TO_TICK(usec) ((usec) / (NANOSEC / hz))
497
498 #define gethrestime_sec() time(NULL)
499 #define gethrestime(t) \
500 do {\
501 (t)->tv_sec = gethrestime_sec();\
502 (t)->tv_nsec = 0;\
503 } while (0);
504
505 #define max_ncpus 64
506
507 #define minclsyspri 60
508 #define maxclsyspri 99
509
510 #define CPU_SEQID (thr_self() & (max_ncpus - 1))
511
512 #define kcred NULL
513 #define CRED() NULL
514
515 #define ptob(x) ((x) * PAGESIZE)
516
517 extern uint64_t physmem;
518
519 extern int highbit(ulong_t i);
520 extern int random_get_bytes(uint8_t *ptr, size_t len);
521 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
522
523 extern void kernel_init(int);
524 extern void kernel_fini(void);
525
526 struct spa;
527 extern void nicenum(uint64_t num, char *buf);
528 extern void show_pool_stats(struct spa *);
529
530 typedef struct callb_cpr {
531 kmutex_t *cc_lockp;
532 } callb_cpr_t;
533
534 #define CALLB_CPR_INIT(cp, lockp, func, name) { \
535 (cp)->cc_lockp = lockp; \
536 }
537
538 #define CALLB_CPR_SAFE_BEGIN(cp) { \
539 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
540 }
541
542 #define CALLB_CPR_SAFE_END(cp, lockp) { \
543 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
544 }
545
546 #define CALLB_CPR_EXIT(cp) { \
547 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
548 mutex_exit((cp)->cc_lockp); \
549 }
550
551 #define zone_dataset_visible(x, y) (1)
552 #define INGLOBALZONE(z) (1)
553
554 extern char *kmem_asprintf(const char *fmt, ...);
555 #define strfree(str) kmem_free((str), strlen(str) + 1)
556
557 /*
558 * Hostname information
559 */
560 extern char hw_serial[]; /* for userland-emulated hostid access */
561 extern int ddi_strtoul(const char *str, char **nptr, int base,
562 unsigned long *result);
563
564 extern int ddi_strtoull(const char *str, char **nptr, int base,
565 u_longlong_t *result);
566
567 /* ZFS Boot Related stuff. */
568
569 struct _buf {
570 intptr_t _fd;
571 };
572
573 struct bootstat {
574 uint64_t st_size;
575 };
576
577 typedef struct ace_object {
578 uid_t a_who;
579 uint32_t a_access_mask;
580 uint16_t a_flags;
581 uint16_t a_type;
582 uint8_t a_obj_type[16];
583 uint8_t a_inherit_obj_type[16];
584 } ace_object_t;
585
586
587 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05
588 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06
589 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07
590 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08
591
592 extern struct _buf *kobj_open_file(char *name);
593 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
594 unsigned off);
595 extern void kobj_close_file(struct _buf *file);
596 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
597 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
598 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
599 cred_t *cr);
600 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
601 extern zoneid_t getzoneid(void);
602
603 /* SID stuff */
604 typedef struct ksiddomain {
605 uint_t kd_ref;
606 uint_t kd_len;
607 char *kd_name;
608 } ksiddomain_t;
609
610 ksiddomain_t *ksid_lookupdomain(const char *);
611 void ksiddomain_rele(ksiddomain_t *);
612
613 #define DDI_SLEEP KM_SLEEP
614 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
615 sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
616
617 /*
618 * Cyclic information
619 */
620 extern kmutex_t cpu_lock;
621
622 typedef uintptr_t cyclic_id_t;
623 typedef uint16_t cyc_level_t;
624 typedef void (*cyc_func_t)(void *);
625
626 #define CY_LOW_LEVEL 0
627 #define CY_INFINITY INT64_MAX
628 #define CYCLIC_NONE ((cyclic_id_t)0)
629
630 typedef struct cyc_time {
631 hrtime_t cyt_when;
632 hrtime_t cyt_interval;
633 } cyc_time_t;
634
635 typedef struct cyc_handler {
636 cyc_func_t cyh_func;
637 void *cyh_arg;
638 cyc_level_t cyh_level;
639 } cyc_handler_t;
640
641 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
642 extern void cyclic_remove(cyclic_id_t);
643 extern int cyclic_reprogram(cyclic_id_t, hrtime_t);
644
645 /*
646 * Buf structure
647 */
648 #define B_BUSY 0x0001
649 #define B_DONE 0x0002
650 #define B_ERROR 0x0004
651 #define B_READ 0x0040 /* read when I/O occurs */
652 #define B_WRITE 0x0100 /* non-read pseudo-flag */
653
654 typedef struct buf {
655 int b_flags;
656 size_t b_bcount;
657 union {
658 caddr_t b_addr;
659 } b_un;
660
661 lldaddr_t _b_blkno;
662 #define b_lblkno _b_blkno._f
663 size_t b_resid;
664 size_t b_bufsize;
665 int (*b_iodone)(struct buf *);
666 int b_error;
667 void *b_private;
668 } buf_t;
669
670 extern void bioinit(buf_t *);
671 extern void biodone(buf_t *);
672 extern void bioerror(buf_t *, int);
673 extern int geterror(buf_t *);
674
675 #ifdef __cplusplus
676 }
677 #endif
678
679 #endif /* _SYS_ZFS_CONTEXT_H */