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	__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  * the kernel.  If they're being used in kernel code, re-define them out of
120  * existence for their counterparts in libzpool.
121  *
122  * Here's an example of how to use the set-error probes in userland:
123  * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
124  *
125  * Here's an example of how to use DTRACE_PROBE probes in userland:
126  * If there is a probe declared as follows:
127  * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
128  * Then you can use it as follows:
129  * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
130  *     {printf("%u %p\n", arg1, arg2);}
131  */
132 
133 #ifdef DTRACE_PROBE
134 #undef	DTRACE_PROBE
135 #endif	/* DTRACE_PROBE */
136 #define	DTRACE_PROBE(a) \
137 	ZFS_PROBE0(#a)
138 
139 #ifdef DTRACE_PROBE1
140 #undef	DTRACE_PROBE1
141 #endif	/* DTRACE_PROBE1 */
142 #define	DTRACE_PROBE1(a, b, c) \
143 	ZFS_PROBE1(#a, (unsigned long)c)
144 
145 #ifdef DTRACE_PROBE2
146 #undef	DTRACE_PROBE2
147 #endif	/* DTRACE_PROBE2 */
148 #define	DTRACE_PROBE2(a, b, c, d, e) \
149 	ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
150 
151 #ifdef DTRACE_PROBE3
152 #undef	DTRACE_PROBE3
153 #endif	/* DTRACE_PROBE3 */
154 #define	DTRACE_PROBE3(a, b, c, d, e, f, g) \
155 	ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
156 
157 #ifdef DTRACE_PROBE4
158 #undef	DTRACE_PROBE4
159 #endif	/* DTRACE_PROBE4 */
160 #define	DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
161 	ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
162 	(unsigned long)i)
163 
164 /*
165  * We use the comma operator so that this macro can be used without much
166  * additional code.  For example, "return (EINVAL);" becomes
167  * "return (SET_ERROR(EINVAL));".  Note that the argument will be evaluated
168  * twice, so it should not have side effects (e.g. something like:
169  * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
170  */
171 #define	SET_ERROR(err) (ZFS_SET_ERROR(err), err)
172 
173 /*
174  * Threads
175  */
176 #define	curthread	((void *)(uintptr_t)thr_self())
177 
178 #define	kpreempt(x)	yield()
179 
180 typedef struct kthread kthread_t;
181 
182 #define	thread_create(stk, stksize, func, arg, len, pp, state, pri)	\
183 	zk_thread_create(func, arg, len)
184 #define	thread_exit() thr_exit(NULL)
185 #define	thread_join(t)	panic("libzpool cannot join threads")
186 
187 #define	newproc(f, a, cid, pri, ctp, pid)	(ENOSYS)
188 
189 /* in libzpool, p0 exists only to have its address taken */
190 struct proc {
191 	uintptr_t	this_is_never_used_dont_dereference_it;
192 };
193 
194 extern struct proc p0;
195 #define	curproc		(&p0)
196 
197 #define	PS_NONE		-1
198 
199 extern kthread_t *zk_thread_create(void (*func)(), void *arg, uint64_t len);
200 
201 #define	issig(why)	(FALSE)
202 #define	ISSIG(thr, why)	(FALSE)
203 
204 /*
205  * Mutexes
206  */
207 typedef struct kmutex {
208 	void		*m_owner;
209 	boolean_t	initialized;
210 	mutex_t		m_lock;
211 } kmutex_t;
212 
213 #define	MUTEX_DEFAULT	USYNC_THREAD
214 #undef	MUTEX_HELD
215 #undef	MUTEX_NOT_HELD
216 #define	MUTEX_HELD(m) _mutex_held(&(m)->m_lock)
217 #define	MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
218 
219 /*
220  * Argh -- we have to get cheesy here because the kernel and userland
221  * have different signatures for the same routine.
222  */
223 extern int _mutex_init(mutex_t *mp, int type, void *arg);
224 extern int _mutex_destroy(mutex_t *mp);
225 
226 #define	mutex_init(mp, b, c, d)		zmutex_init((kmutex_t *)(mp))
227 #define	mutex_destroy(mp)		zmutex_destroy((kmutex_t *)(mp))
228 #define	mutex_enter(mp)			zmutex_enter(mp)
229 #define	mutex_exit(mp)			zmutex_exit(mp)
230 
231 extern void zmutex_init(kmutex_t *mp);
232 extern void zmutex_destroy(kmutex_t *mp);
233 extern void zmutex_enter(kmutex_t *mp);
234 extern void zmutex_exit(kmutex_t *mp);
235 extern int mutex_tryenter(kmutex_t *mp);
236 extern void *mutex_owner(kmutex_t *mp);
237 
238 /*
239  * RW locks
240  */
241 typedef struct krwlock {
242 	void		*rw_owner;
243 	boolean_t	initialized;
244 	rwlock_t	rw_lock;
245 } krwlock_t;
246 
247 typedef int krw_t;
248 
249 #define	RW_READER	0
250 #define	RW_WRITER	1
251 #define	RW_DEFAULT	USYNC_THREAD
252 
253 #undef RW_READ_HELD
254 #define	RW_READ_HELD(x)		_rw_read_held(&(x)->rw_lock)
255 
256 #undef RW_WRITE_HELD
257 #define	RW_WRITE_HELD(x)	_rw_write_held(&(x)->rw_lock)
258 
259 #undef RW_LOCK_HELD
260 #define	RW_LOCK_HELD(x)		(RW_READ_HELD(x) || RW_WRITE_HELD(x))
261 
262 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
263 extern void rw_destroy(krwlock_t *rwlp);
264 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
265 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
266 extern int rw_tryupgrade(krwlock_t *rwlp);
267 extern void rw_exit(krwlock_t *rwlp);
268 #define	rw_downgrade(rwlp) do { } while (0)
269 
270 extern uid_t crgetuid(cred_t *cr);
271 extern uid_t crgetruid(cred_t *cr);
272 extern gid_t crgetgid(cred_t *cr);
273 extern int crgetngroups(cred_t *cr);
274 extern gid_t *crgetgroups(cred_t *cr);
275 
276 /*
277  * Condition variables
278  */
279 typedef cond_t kcondvar_t;
280 
281 #define	CV_DEFAULT	USYNC_THREAD
282 #define	CALLOUT_FLAG_ABSOLUTE	0x2
283 
284 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
285 extern void cv_destroy(kcondvar_t *cv);
286 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
287 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
288 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
289     hrtime_t res, int flag);
290 extern void cv_signal(kcondvar_t *cv);
291 extern void cv_broadcast(kcondvar_t *cv);
292 
293 /*
294  * Thread-specific data
295  */
296 #define	tsd_get(k) pthread_getspecific(k)
297 #define	tsd_set(k, v) pthread_setspecific(k, v)
298 #define	tsd_create(kp, d) pthread_key_create(kp, d)
299 #define	tsd_destroy(kp) /* nothing */
300 
301 /*
302  * kstat creation, installation and deletion
303  */
304 extern kstat_t *kstat_create(const char *, int,
305     const char *, const char *, uchar_t, ulong_t, uchar_t);
306 extern void kstat_install(kstat_t *);
307 extern void kstat_delete(kstat_t *);
308 extern void kstat_waitq_enter(kstat_io_t *);
309 extern void kstat_waitq_exit(kstat_io_t *);
310 extern void kstat_runq_enter(kstat_io_t *);
311 extern void kstat_runq_exit(kstat_io_t *);
312 extern void kstat_waitq_to_runq(kstat_io_t *);
313 extern void kstat_runq_back_to_waitq(kstat_io_t *);
314 
315 /*
316  * Kernel memory
317  */
318 #define	KM_SLEEP		UMEM_NOFAIL
319 #define	KM_PUSHPAGE		KM_SLEEP
320 #define	KM_NOSLEEP		UMEM_DEFAULT
321 #define	KMC_NODEBUG		UMC_NODEBUG
322 #define	KMC_NOTOUCH		0	/* not needed for userland caches */
323 #define	kmem_alloc(_s, _f)	umem_alloc(_s, _f)
324 #define	kmem_zalloc(_s, _f)	umem_zalloc(_s, _f)
325 #define	kmem_free(_b, _s)	umem_free(_b, _s)
326 #define	kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
327 	umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
328 #define	kmem_cache_destroy(_c)	umem_cache_destroy(_c)
329 #define	kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
330 #define	kmem_cache_free(_c, _b)	umem_cache_free(_c, _b)
331 #define	kmem_debugging()	0
332 #define	kmem_cache_reap_now(_c)		/* nothing */
333 #define	kmem_cache_set_move(_c, _cb)	/* nothing */
334 #define	vmem_qcache_reap(_v)		/* nothing */
335 #define	POINTER_INVALIDATE(_pp)		/* nothing */
336 #define	POINTER_IS_VALID(_p)	0
337 
338 extern vmem_t *zio_arena;
339 
340 typedef umem_cache_t kmem_cache_t;
341 
342 typedef enum kmem_cbrc {
343 	KMEM_CBRC_YES,
344 	KMEM_CBRC_NO,
345 	KMEM_CBRC_LATER,
346 	KMEM_CBRC_DONT_NEED,
347 	KMEM_CBRC_DONT_KNOW
348 } kmem_cbrc_t;
349 
350 /*
351  * Task queues
352  */
353 typedef struct taskq taskq_t;
354 typedef uintptr_t taskqid_t;
355 typedef void (task_func_t)(void *);
356 
357 typedef struct taskq_ent {
358 	struct taskq_ent	*tqent_next;
359 	struct taskq_ent	*tqent_prev;
360 	task_func_t		*tqent_func;
361 	void			*tqent_arg;
362 	uintptr_t		tqent_flags;
363 } taskq_ent_t;
364 
365 #define	TQENT_FLAG_PREALLOC	0x1	/* taskq_dispatch_ent used */
366 
367 #define	TASKQ_PREPOPULATE	0x0001
368 #define	TASKQ_CPR_SAFE		0x0002	/* Use CPR safe protocol */
369 #define	TASKQ_DYNAMIC		0x0004	/* Use dynamic thread scheduling */
370 #define	TASKQ_THREADS_CPU_PCT	0x0008	/* Scale # threads by # cpus */
371 #define	TASKQ_DC_BATCH		0x0010	/* Mark threads as batch */
372 
373 #define	TQ_SLEEP	KM_SLEEP	/* Can block for memory */
374 #define	TQ_NOSLEEP	KM_NOSLEEP	/* cannot block for memory; may fail */
375 #define	TQ_NOQUEUE	0x02		/* Do not enqueue if can't dispatch */
376 #define	TQ_FRONT	0x08		/* Queue in front */
377 
378 
379 extern taskq_t *system_taskq;
380 
381 extern taskq_t	*taskq_create(const char *, int, pri_t, int, int, uint_t);
382 #define	taskq_create_proc(a, b, c, d, e, p, f) \
383 	    (taskq_create(a, b, c, d, e, f))
384 #define	taskq_create_sysdc(a, b, d, e, p, dc, f) \
385 	    (taskq_create(a, b, maxclsyspri, d, e, f))
386 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
387 extern void	taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
388     taskq_ent_t *);
389 extern void	taskq_destroy(taskq_t *);
390 extern void	taskq_wait(taskq_t *);
391 extern int	taskq_member(taskq_t *, void *);
392 extern void	system_taskq_init(void);
393 extern void	system_taskq_fini(void);
394 
395 #define	XVA_MAPSIZE	3
396 #define	XVA_MAGIC	0x78766174
397 
398 /*
399  * vnodes
400  */
401 typedef struct vnode {
402 	uint64_t	v_size;
403 	int		v_fd;
404 	char		*v_path;
405 	int		v_dump_fd;
406 } vnode_t;
407 
408 extern char *vn_dumpdir;
409 #define	AV_SCANSTAMP_SZ	32		/* length of anti-virus scanstamp */
410 
411 typedef struct xoptattr {
412 	timestruc_t	xoa_createtime;	/* Create time of file */
413 	uint8_t		xoa_archive;
414 	uint8_t		xoa_system;
415 	uint8_t		xoa_readonly;
416 	uint8_t		xoa_hidden;
417 	uint8_t		xoa_nounlink;
418 	uint8_t		xoa_immutable;
419 	uint8_t		xoa_appendonly;
420 	uint8_t		xoa_nodump;
421 	uint8_t		xoa_settable;
422 	uint8_t		xoa_opaque;
423 	uint8_t		xoa_av_quarantined;
424 	uint8_t		xoa_av_modified;
425 	uint8_t		xoa_av_scanstamp[AV_SCANSTAMP_SZ];
426 	uint8_t		xoa_reparse;
427 	uint8_t		xoa_offline;
428 	uint8_t		xoa_sparse;
429 } xoptattr_t;
430 
431 typedef struct vattr {
432 	uint_t		va_mask;	/* bit-mask of attributes */
433 	u_offset_t	va_size;	/* file size in bytes */
434 } vattr_t;
435 
436 
437 typedef struct xvattr {
438 	vattr_t		xva_vattr;	/* Embedded vattr structure */
439 	uint32_t	xva_magic;	/* Magic Number */
440 	uint32_t	xva_mapsize;	/* Size of attr bitmap (32-bit words) */
441 	uint32_t	*xva_rtnattrmapp;	/* Ptr to xva_rtnattrmap[] */
442 	uint32_t	xva_reqattrmap[XVA_MAPSIZE];	/* Requested attrs */
443 	uint32_t	xva_rtnattrmap[XVA_MAPSIZE];	/* Returned attrs */
444 	xoptattr_t	xva_xoptattrs;	/* Optional attributes */
445 } xvattr_t;
446 
447 typedef struct vsecattr {
448 	uint_t		vsa_mask;	/* See below */
449 	int		vsa_aclcnt;	/* ACL entry count */
450 	void		*vsa_aclentp;	/* pointer to ACL entries */
451 	int		vsa_dfaclcnt;	/* default ACL entry count */
452 	void		*vsa_dfaclentp;	/* pointer to default ACL entries */
453 	size_t		vsa_aclentsz;	/* ACE size in bytes of vsa_aclentp */
454 } vsecattr_t;
455 
456 #define	AT_TYPE		0x00001
457 #define	AT_MODE		0x00002
458 #define	AT_UID		0x00004
459 #define	AT_GID		0x00008
460 #define	AT_FSID		0x00010
461 #define	AT_NODEID	0x00020
462 #define	AT_NLINK	0x00040
463 #define	AT_SIZE		0x00080
464 #define	AT_ATIME	0x00100
465 #define	AT_MTIME	0x00200
466 #define	AT_CTIME	0x00400
467 #define	AT_RDEV		0x00800
468 #define	AT_BLKSIZE	0x01000
469 #define	AT_NBLOCKS	0x02000
470 #define	AT_SEQ		0x08000
471 #define	AT_XVATTR	0x10000
472 
473 #define	CRCREAT		0
474 
475 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
476 
477 #define	VOP_CLOSE(vp, f, c, o, cr, ct)	0
478 #define	VOP_PUTPAGE(vp, of, sz, fl, cr, ct)	0
479 #define	VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
480 
481 #define	VOP_FSYNC(vp, f, cr, ct)	fsync((vp)->v_fd)
482 
483 #define	VN_RELE(vp)	vn_close(vp)
484 
485 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
486     int x2, int x3);
487 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
488     int x2, int x3, vnode_t *vp, int fd);
489 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
490     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
491 extern void vn_close(vnode_t *vp);
492 
493 #define	vn_remove(path, x1, x2)		remove(path)
494 #define	vn_rename(from, to, seg)	rename((from), (to))
495 #define	vn_is_readonly(vp)		B_FALSE
496 
497 extern vnode_t *rootdir;
498 
499 #include <sys/file.h>		/* for FREAD, FWRITE, etc */
500 
501 /*
502  * Random stuff
503  */
504 #define	ddi_get_lbolt()		(gethrtime() >> 23)
505 #define	ddi_get_lbolt64()	(gethrtime() >> 23)
506 #define	hz	119	/* frequency when using gethrtime() >> 23 for lbolt */
507 
508 extern void delay(clock_t ticks);
509 
510 #define	SEC_TO_TICK(sec)	((sec) * hz)
511 #define	NSEC_TO_TICK(usec)	((usec) / (NANOSEC / hz))
512 
513 #define	gethrestime_sec() time(NULL)
514 #define	gethrestime(t) \
515 	do {\
516 		(t)->tv_sec = gethrestime_sec();\
517 		(t)->tv_nsec = 0;\
518 	} while (0);
519 
520 #define	max_ncpus	64
521 #define	boot_ncpus	(sysconf(_SC_NPROCESSORS_ONLN))
522 
523 #define	minclsyspri	60
524 #define	maxclsyspri	99
525 
526 #define	CPU_SEQID	(thr_self() & (max_ncpus - 1))
527 
528 #define	kcred		NULL
529 #define	CRED()		NULL
530 
531 #define	ptob(x)		((x) * PAGESIZE)
532 
533 extern uint64_t physmem;
534 
535 extern int highbit64(uint64_t i);
536 extern int random_get_bytes(uint8_t *ptr, size_t len);
537 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
538 
539 extern void kernel_init(int);
540 extern void kernel_fini(void);
541 
542 struct spa;
543 extern void nicenum(uint64_t num, char *buf);
544 extern void show_pool_stats(struct spa *);
545 extern int set_global_var(char *arg);
546 
547 typedef struct callb_cpr {
548 	kmutex_t	*cc_lockp;
549 } callb_cpr_t;
550 
551 #define	CALLB_CPR_INIT(cp, lockp, func, name)	{		\
552 	(cp)->cc_lockp = lockp;					\
553 }
554 
555 #define	CALLB_CPR_SAFE_BEGIN(cp) {				\
556 	ASSERT(MUTEX_HELD((cp)->cc_lockp));			\
557 }
558 
559 #define	CALLB_CPR_SAFE_END(cp, lockp) {				\
560 	ASSERT(MUTEX_HELD((cp)->cc_lockp));			\
561 }
562 
563 #define	CALLB_CPR_EXIT(cp) {					\
564 	ASSERT(MUTEX_HELD((cp)->cc_lockp));			\
565 	mutex_exit((cp)->cc_lockp);				\
566 }
567 
568 #define	zone_dataset_visible(x, y)	(1)
569 #define	INGLOBALZONE(z)			(1)
570 
571 extern char *kmem_asprintf(const char *fmt, ...);
572 #define	strfree(str) kmem_free((str), strlen(str) + 1)
573 
574 /*
575  * Hostname information
576  */
577 extern char hw_serial[];	/* for userland-emulated hostid access */
578 extern int ddi_strtoul(const char *str, char **nptr, int base,
579     unsigned long *result);
580 
581 extern int ddi_strtoull(const char *str, char **nptr, int base,
582     u_longlong_t *result);
583 
584 /* ZFS Boot Related stuff. */
585 
586 struct _buf {
587 	intptr_t	_fd;
588 };
589 
590 struct bootstat {
591 	uint64_t st_size;
592 };
593 
594 typedef struct ace_object {
595 	uid_t		a_who;
596 	uint32_t	a_access_mask;
597 	uint16_t	a_flags;
598 	uint16_t	a_type;
599 	uint8_t		a_obj_type[16];
600 	uint8_t		a_inherit_obj_type[16];
601 } ace_object_t;
602 
603 
604 #define	ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE	0x05
605 #define	ACE_ACCESS_DENIED_OBJECT_ACE_TYPE	0x06
606 #define	ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE	0x07
607 #define	ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE	0x08
608 
609 extern struct _buf *kobj_open_file(char *name);
610 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
611     unsigned off);
612 extern void kobj_close_file(struct _buf *file);
613 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
614 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
615 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
616     cred_t *cr);
617 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
618 extern zoneid_t getzoneid(void);
619 
620 /* SID stuff */
621 typedef struct ksiddomain {
622 	uint_t	kd_ref;
623 	uint_t	kd_len;
624 	char	*kd_name;
625 } ksiddomain_t;
626 
627 ksiddomain_t *ksid_lookupdomain(const char *);
628 void ksiddomain_rele(ksiddomain_t *);
629 
630 #define	DDI_SLEEP	KM_SLEEP
631 #define	ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
632 	sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
633 
634 /*
635  * Cyclic information
636  */
637 extern kmutex_t cpu_lock;
638 
639 typedef uintptr_t cyclic_id_t;
640 typedef uint16_t cyc_level_t;
641 typedef void (*cyc_func_t)(void *);
642 
643 #define	CY_LOW_LEVEL	0
644 #define	CY_INFINITY	INT64_MAX
645 #define	CYCLIC_NONE	((cyclic_id_t)0)
646 
647 typedef struct cyc_time {
648 	hrtime_t cyt_when;
649 	hrtime_t cyt_interval;
650 } cyc_time_t;
651 
652 typedef struct cyc_handler {
653 	cyc_func_t cyh_func;
654 	void *cyh_arg;
655 	cyc_level_t cyh_level;
656 } cyc_handler_t;
657 
658 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
659 extern void cyclic_remove(cyclic_id_t);
660 extern int cyclic_reprogram(cyclic_id_t, hrtime_t);
661 
662 /*
663  * Buf structure
664  */
665 #define	B_BUSY		0x0001
666 #define	B_DONE		0x0002
667 #define	B_ERROR		0x0004
668 #define	B_READ		0x0040	/* read when I/O occurs */
669 #define	B_WRITE		0x0100	/* non-read pseudo-flag */
670 
671 typedef struct buf {
672 	int	b_flags;
673 	size_t b_bcount;
674 	union {
675 		caddr_t b_addr;
676 	} b_un;
677 
678 	lldaddr_t	_b_blkno;
679 #define	b_lblkno	_b_blkno._f
680 	size_t	b_resid;
681 	size_t	b_bufsize;
682 	int	(*b_iodone)(struct buf *);
683 	int	b_error;
684 	void	*b_private;
685 } buf_t;
686 
687 extern void bioinit(buf_t *);
688 extern void biodone(buf_t *);
689 extern void bioerror(buf_t *, int);
690 extern int geterror(buf_t *);
691 
692 #ifdef	__cplusplus
693 }
694 #endif
695 
696 #endif	/* _SYS_ZFS_CONTEXT_H */
697