xref: /illumos-gate/usr/src/lib/libzpool/common/sys/zfs_context.h (revision 8c69cc8fbe729fa7b091e901c4b50508ccc6bb33)
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 <setjmp.h>
66 #include <sys/debug.h>
67 #include <libsysevent.h>
68 #include <sys/note.h>
69 #include <sys/types.h>
70 #include <sys/cred.h>
71 #include <sys/sysmacros.h>
72 #include <sys/bitmap.h>
73 #include <sys/resource.h>
74 #include <sys/byteorder.h>
75 #include <sys/list.h>
76 #include <sys/uio.h>
77 #include <sys/zfs_debug.h>
78 #include <sys/sdt.h>
79 #include <sys/kstat.h>
80 #include <sys/u8_textprep.h>
81 #include <sys/sysevent/eventdefs.h>
82 #include <sys/sysevent/dev.h>
83 #include <sys/sunddi.h>
84 #include <sys/debug.h>
85 #include "zfs.h"
86 
87 /*
88  * Debugging
89  */
90 
91 /*
92  * Note that we are not using the debugging levels.
93  */
94 
95 #define	CE_CONT		0	/* continuation		*/
96 #define	CE_NOTE		1	/* notice		*/
97 #define	CE_WARN		2	/* warning		*/
98 #define	CE_PANIC	3	/* panic		*/
99 #define	CE_IGNORE	4	/* print nothing	*/
100 
101 /*
102  * ZFS debugging
103  */
104 
105 #ifdef ZFS_DEBUG
106 extern void dprintf_setup(int *argc, char **argv);
107 #endif /* ZFS_DEBUG */
108 
109 extern void cmn_err(int, const char *, ...);
110 extern void vcmn_err(int, const char *, __va_list);
111 extern void panic(const char *, ...)  __NORETURN;
112 extern void vpanic(const char *, __va_list)  __NORETURN;
113 
114 #define	fm_panic	panic
115 
116 extern int aok;
117 
118 /*
119  * DTrace SDT probes have different signatures in userland than they do in
120  * the kernel.  If they're being used in kernel code, re-define them out of
121  * existence for their counterparts in libzpool.
122  *
123  * Here's an example of how to use the set-error probes in userland:
124  * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
125  *
126  * Here's an example of how to use DTRACE_PROBE probes in userland:
127  * If there is a probe declared as follows:
128  * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
129  * Then you can use it as follows:
130  * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
131  *     {printf("%u %p\n", arg1, arg2);}
132  */
133 
134 #ifdef DTRACE_PROBE
135 #undef	DTRACE_PROBE
136 #endif	/* DTRACE_PROBE */
137 #define	DTRACE_PROBE(a) \
138 	ZFS_PROBE0(#a)
139 
140 #ifdef DTRACE_PROBE1
141 #undef	DTRACE_PROBE1
142 #endif	/* DTRACE_PROBE1 */
143 #define	DTRACE_PROBE1(a, b, c) \
144 	ZFS_PROBE1(#a, (unsigned long)c)
145 
146 #ifdef DTRACE_PROBE2
147 #undef	DTRACE_PROBE2
148 #endif	/* DTRACE_PROBE2 */
149 #define	DTRACE_PROBE2(a, b, c, d, e) \
150 	ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
151 
152 #ifdef DTRACE_PROBE3
153 #undef	DTRACE_PROBE3
154 #endif	/* DTRACE_PROBE3 */
155 #define	DTRACE_PROBE3(a, b, c, d, e, f, g) \
156 	ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
157 
158 #ifdef DTRACE_PROBE4
159 #undef	DTRACE_PROBE4
160 #endif	/* DTRACE_PROBE4 */
161 #define	DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
162 	ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
163 	(unsigned long)i)
164 
165 /*
166  * We use the comma operator so that this macro can be used without much
167  * additional code.  For example, "return (EINVAL);" becomes
168  * "return (SET_ERROR(EINVAL));".  Note that the argument will be evaluated
169  * twice, so it should not have side effects (e.g. something like:
170  * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
171  */
172 #define	SET_ERROR(err) (ZFS_SET_ERROR(err), err)
173 
174 /*
175  * Threads
176  */
177 #define	curthread	((void *)(uintptr_t)thr_self())
178 
179 #define	kpreempt(x)	yield()
180 
181 typedef struct kthread kthread_t;
182 
183 #define	thread_create(stk, stksize, func, arg, len, pp, state, pri)	\
184 	zk_thread_create(func, arg, len)
185 #define	thread_exit() thr_exit(NULL)
186 #define	thread_join(t)	panic("libzpool cannot join threads")
187 
188 #define	newproc(f, a, cid, pri, ctp, pid)	(ENOSYS)
189 
190 /* in libzpool, p0 exists only to have its address taken */
191 struct proc {
192 	uintptr_t	this_is_never_used_dont_dereference_it;
193 };
194 
195 extern struct proc p0;
196 #define	curproc		(&p0)
197 
198 #define	PS_NONE		-1
199 
200 extern kthread_t *zk_thread_create(void (*func)(void*), void *arg,
201     uint64_t len);
202 
203 #define	issig(why)	(FALSE)
204 #define	ISSIG(thr, why)	(FALSE)
205 
206 /*
207  * Mutexes
208  */
209 typedef struct kmutex {
210 	void		*m_owner;
211 	boolean_t	initialized;
212 	mutex_t		m_lock;
213 } kmutex_t;
214 
215 #define	MUTEX_DEFAULT	USYNC_THREAD
216 #undef	MUTEX_HELD
217 #undef	MUTEX_NOT_HELD
218 #define	MUTEX_HELD(m) _mutex_held(&(m)->m_lock)
219 #define	MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
220 
221 /*
222  * Argh -- we have to get cheesy here because the kernel and userland
223  * have different signatures for the same routine.
224  */
225 extern int _mutex_init(mutex_t *mp, int type, void *arg);
226 extern int _mutex_destroy(mutex_t *mp);
227 
228 #define	mutex_init(mp, b, c, d)		zmutex_init((kmutex_t *)(mp))
229 #define	mutex_destroy(mp)		zmutex_destroy((kmutex_t *)(mp))
230 #define	mutex_enter(mp)			zmutex_enter(mp)
231 #define	mutex_exit(mp)			zmutex_exit(mp)
232 
233 extern void zmutex_init(kmutex_t *mp);
234 extern void zmutex_destroy(kmutex_t *mp);
235 extern void zmutex_enter(kmutex_t *mp);
236 extern void zmutex_exit(kmutex_t *mp);
237 extern int mutex_tryenter(kmutex_t *mp);
238 extern void *mutex_owner(kmutex_t *mp);
239 
240 /*
241  * RW locks
242  */
243 typedef struct krwlock {
244 	void		*rw_owner;
245 	boolean_t	initialized;
246 	rwlock_t	rw_lock;
247 } krwlock_t;
248 
249 typedef int krw_t;
250 
251 #define	RW_READER	0
252 #define	RW_WRITER	1
253 #define	RW_DEFAULT	USYNC_THREAD
254 
255 #undef RW_READ_HELD
256 #define	RW_READ_HELD(x)		_rw_read_held(&(x)->rw_lock)
257 
258 #undef RW_WRITE_HELD
259 #define	RW_WRITE_HELD(x)	_rw_write_held(&(x)->rw_lock)
260 
261 #undef RW_LOCK_HELD
262 #define	RW_LOCK_HELD(x)		(RW_READ_HELD(x) || RW_WRITE_HELD(x))
263 
264 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
265 extern void rw_destroy(krwlock_t *rwlp);
266 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
267 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
268 extern int rw_tryupgrade(krwlock_t *rwlp);
269 extern void rw_exit(krwlock_t *rwlp);
270 #define	rw_downgrade(rwlp) do { } while (0)
271 
272 extern uid_t crgetuid(cred_t *cr);
273 extern uid_t crgetruid(cred_t *cr);
274 extern gid_t crgetgid(cred_t *cr);
275 extern int crgetngroups(cred_t *cr);
276 extern gid_t *crgetgroups(cred_t *cr);
277 
278 /*
279  * Condition variables
280  */
281 typedef cond_t kcondvar_t;
282 
283 #define	CV_DEFAULT	USYNC_THREAD
284 #define	CALLOUT_FLAG_ABSOLUTE	0x2
285 
286 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
287 extern void cv_destroy(kcondvar_t *cv);
288 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
289 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
290 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
291     hrtime_t res, int flag);
292 extern void cv_signal(kcondvar_t *cv);
293 extern void cv_broadcast(kcondvar_t *cv);
294 
295 /*
296  * Thread-specific data
297  */
298 #define	tsd_get(k) pthread_getspecific(k)
299 #define	tsd_set(k, v) pthread_setspecific(k, v)
300 #define	tsd_create(kp, d) pthread_key_create(kp, d)
301 #define	tsd_destroy(kp) /* nothing */
302 
303 /*
304  * kstat creation, installation and deletion
305  */
306 extern kstat_t *kstat_create(const char *, int,
307     const char *, const char *, uchar_t, ulong_t, uchar_t);
308 extern void kstat_named_init(kstat_named_t *, const char *, uchar_t);
309 extern void kstat_install(kstat_t *);
310 extern void kstat_delete(kstat_t *);
311 extern void kstat_waitq_enter(kstat_io_t *);
312 extern void kstat_waitq_exit(kstat_io_t *);
313 extern void kstat_runq_enter(kstat_io_t *);
314 extern void kstat_runq_exit(kstat_io_t *);
315 extern void kstat_waitq_to_runq(kstat_io_t *);
316 extern void kstat_runq_back_to_waitq(kstat_io_t *);
317 
318 /*
319  * Kernel memory
320  */
321 #define	KM_SLEEP		UMEM_NOFAIL
322 #define	KM_PUSHPAGE		KM_SLEEP
323 #define	KM_NOSLEEP		UMEM_DEFAULT
324 #define	KM_NORMALPRI		0	/* not needed with UMEM_DEFAULT */
325 #define	KMC_NODEBUG		UMC_NODEBUG
326 #define	KMC_NOTOUCH		0	/* not needed for userland caches */
327 #define	kmem_alloc(_s, _f)	umem_alloc(_s, _f)
328 #define	kmem_zalloc(_s, _f)	umem_zalloc(_s, _f)
329 #define	kmem_free(_b, _s)	umem_free(_b, _s)
330 #define	kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
331 	umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
332 #define	kmem_cache_destroy(_c)	umem_cache_destroy(_c)
333 #define	kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
334 #define	kmem_cache_free(_c, _b)	umem_cache_free(_c, _b)
335 #define	kmem_debugging()	0
336 #define	kmem_cache_reap_now(_c)		/* nothing */
337 #define	kmem_cache_set_move(_c, _cb)	/* nothing */
338 #define	vmem_qcache_reap(_v)		/* nothing */
339 #define	POINTER_INVALIDATE(_pp)		/* nothing */
340 #define	POINTER_IS_VALID(_p)	0
341 
342 extern vmem_t *zio_arena;
343 
344 typedef umem_cache_t kmem_cache_t;
345 
346 typedef enum kmem_cbrc {
347 	KMEM_CBRC_YES,
348 	KMEM_CBRC_NO,
349 	KMEM_CBRC_LATER,
350 	KMEM_CBRC_DONT_NEED,
351 	KMEM_CBRC_DONT_KNOW
352 } kmem_cbrc_t;
353 
354 /*
355  * Task queues
356  */
357 typedef struct taskq taskq_t;
358 typedef uintptr_t taskqid_t;
359 typedef void (task_func_t)(void *);
360 
361 typedef struct taskq_ent {
362 	struct taskq_ent	*tqent_next;
363 	struct taskq_ent	*tqent_prev;
364 	task_func_t		*tqent_func;
365 	void			*tqent_arg;
366 	uintptr_t		tqent_flags;
367 } taskq_ent_t;
368 
369 #define	TQENT_FLAG_PREALLOC	0x1	/* taskq_dispatch_ent used */
370 
371 #define	TASKQ_PREPOPULATE	0x0001
372 #define	TASKQ_CPR_SAFE		0x0002	/* Use CPR safe protocol */
373 #define	TASKQ_DYNAMIC		0x0004	/* Use dynamic thread scheduling */
374 #define	TASKQ_THREADS_CPU_PCT	0x0008	/* Scale # threads by # cpus */
375 #define	TASKQ_DC_BATCH		0x0010	/* Mark threads as batch */
376 
377 #define	TQ_SLEEP	KM_SLEEP	/* Can block for memory */
378 #define	TQ_NOSLEEP	KM_NOSLEEP	/* cannot block for memory; may fail */
379 #define	TQ_NOQUEUE	0x02		/* Do not enqueue if can't dispatch */
380 #define	TQ_FRONT	0x08		/* Queue in front */
381 
382 
383 extern taskq_t *system_taskq;
384 
385 extern taskq_t	*taskq_create(const char *, int, pri_t, int, int, uint_t);
386 #define	taskq_create_proc(a, b, c, d, e, p, f) \
387 	    (taskq_create(a, b, c, d, e, f))
388 #define	taskq_create_sysdc(a, b, d, e, p, dc, f) \
389 	    (taskq_create(a, b, maxclsyspri, d, e, f))
390 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
391 extern void	taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
392     taskq_ent_t *);
393 extern void	taskq_destroy(taskq_t *);
394 extern void	taskq_wait(taskq_t *);
395 extern int	taskq_member(taskq_t *, void *);
396 extern void	system_taskq_init(void);
397 extern void	system_taskq_fini(void);
398 
399 #define	XVA_MAPSIZE	3
400 #define	XVA_MAGIC	0x78766174
401 
402 /*
403  * vnodes
404  */
405 typedef struct vnode {
406 	uint64_t	v_size;
407 	int		v_fd;
408 	char		*v_path;
409 	int		v_dump_fd;
410 } vnode_t;
411 
412 extern char *vn_dumpdir;
413 #define	AV_SCANSTAMP_SZ	32		/* length of anti-virus scanstamp */
414 
415 typedef struct xoptattr {
416 	timestruc_t	xoa_createtime;	/* Create time of file */
417 	uint8_t		xoa_archive;
418 	uint8_t		xoa_system;
419 	uint8_t		xoa_readonly;
420 	uint8_t		xoa_hidden;
421 	uint8_t		xoa_nounlink;
422 	uint8_t		xoa_immutable;
423 	uint8_t		xoa_appendonly;
424 	uint8_t		xoa_nodump;
425 	uint8_t		xoa_settable;
426 	uint8_t		xoa_opaque;
427 	uint8_t		xoa_av_quarantined;
428 	uint8_t		xoa_av_modified;
429 	uint8_t		xoa_av_scanstamp[AV_SCANSTAMP_SZ];
430 	uint8_t		xoa_reparse;
431 	uint8_t		xoa_offline;
432 	uint8_t		xoa_sparse;
433 } xoptattr_t;
434 
435 typedef struct vattr {
436 	uint_t		va_mask;	/* bit-mask of attributes */
437 	u_offset_t	va_size;	/* file size in bytes */
438 } vattr_t;
439 
440 
441 typedef struct xvattr {
442 	vattr_t		xva_vattr;	/* Embedded vattr structure */
443 	uint32_t	xva_magic;	/* Magic Number */
444 	uint32_t	xva_mapsize;	/* Size of attr bitmap (32-bit words) */
445 	uint32_t	*xva_rtnattrmapp;	/* Ptr to xva_rtnattrmap[] */
446 	uint32_t	xva_reqattrmap[XVA_MAPSIZE];	/* Requested attrs */
447 	uint32_t	xva_rtnattrmap[XVA_MAPSIZE];	/* Returned attrs */
448 	xoptattr_t	xva_xoptattrs;	/* Optional attributes */
449 } xvattr_t;
450 
451 typedef struct vsecattr {
452 	uint_t		vsa_mask;	/* See below */
453 	int		vsa_aclcnt;	/* ACL entry count */
454 	void		*vsa_aclentp;	/* pointer to ACL entries */
455 	int		vsa_dfaclcnt;	/* default ACL entry count */
456 	void		*vsa_dfaclentp;	/* pointer to default ACL entries */
457 	size_t		vsa_aclentsz;	/* ACE size in bytes of vsa_aclentp */
458 } vsecattr_t;
459 
460 #define	AT_TYPE		0x00001
461 #define	AT_MODE		0x00002
462 #define	AT_UID		0x00004
463 #define	AT_GID		0x00008
464 #define	AT_FSID		0x00010
465 #define	AT_NODEID	0x00020
466 #define	AT_NLINK	0x00040
467 #define	AT_SIZE		0x00080
468 #define	AT_ATIME	0x00100
469 #define	AT_MTIME	0x00200
470 #define	AT_CTIME	0x00400
471 #define	AT_RDEV		0x00800
472 #define	AT_BLKSIZE	0x01000
473 #define	AT_NBLOCKS	0x02000
474 #define	AT_SEQ		0x08000
475 #define	AT_XVATTR	0x10000
476 
477 #define	CRCREAT		0
478 
479 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
480 
481 #define	VOP_CLOSE(vp, f, c, o, cr, ct)	0
482 #define	VOP_PUTPAGE(vp, of, sz, fl, cr, ct)	0
483 #define	VOP_GETATTR(vp, vap, fl, cr, ct)  fop_getattr((vp), (vap));
484 
485 #define	VOP_FSYNC(vp, f, cr, ct)	fsync((vp)->v_fd)
486 
487 #define	VN_RELE(vp)	vn_close(vp)
488 
489 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
490     int x2, int x3);
491 extern int vn_openat(char *path, int x1, int oflags, int mode, vnode_t **vpp,
492     int x2, int x3, vnode_t *vp, int fd);
493 extern int vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len,
494     offset_t offset, int x1, int x2, rlim64_t x3, void *x4, ssize_t *residp);
495 extern void vn_close(vnode_t *vp);
496 
497 #define	vn_remove(path, x1, x2)		remove(path)
498 #define	vn_rename(from, to, seg)	rename((from), (to))
499 #define	vn_is_readonly(vp)		B_FALSE
500 
501 extern vnode_t *rootdir;
502 
503 #include <sys/file.h>		/* for FREAD, FWRITE, etc */
504 
505 /*
506  * Random stuff
507  */
508 #define	ddi_get_lbolt()		(gethrtime() >> 23)
509 #define	ddi_get_lbolt64()	(gethrtime() >> 23)
510 #define	hz	119	/* frequency when using gethrtime() >> 23 for lbolt */
511 
512 extern void delay(clock_t ticks);
513 
514 #define	SEC_TO_TICK(sec)	((sec) * hz)
515 #define	NSEC_TO_TICK(usec)	((usec) / (NANOSEC / hz))
516 
517 #define	gethrestime_sec() time(NULL)
518 #define	gethrestime(t) \
519 	do {\
520 		(t)->tv_sec = gethrestime_sec();\
521 		(t)->tv_nsec = 0;\
522 	} while (0);
523 
524 #define	max_ncpus	64
525 #define	boot_ncpus	(sysconf(_SC_NPROCESSORS_ONLN))
526 
527 #define	minclsyspri	60
528 #define	maxclsyspri	99
529 
530 #define	CPU_SEQID	(thr_self() & (max_ncpus - 1))
531 
532 #define	kcred		NULL
533 #define	CRED()		NULL
534 
535 #define	ptob(x)		((x) * PAGESIZE)
536 
537 extern uint64_t physmem;
538 
539 extern int highbit64(uint64_t i);
540 extern int random_get_bytes(uint8_t *ptr, size_t len);
541 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
542 
543 extern void kernel_init(int);
544 extern void kernel_fini(void);
545 
546 struct spa;
547 extern void nicenum(uint64_t num, char *buf, size_t);
548 extern void show_pool_stats(struct spa *);
549 extern int set_global_var(char *arg);
550 
551 typedef struct callb_cpr {
552 	kmutex_t	*cc_lockp;
553 } callb_cpr_t;
554 
555 #define	CALLB_CPR_INIT(cp, lockp, func, name)	{		\
556 	(cp)->cc_lockp = lockp;					\
557 }
558 
559 #define	CALLB_CPR_SAFE_BEGIN(cp) {				\
560 	ASSERT(MUTEX_HELD((cp)->cc_lockp));			\
561 }
562 
563 #define	CALLB_CPR_SAFE_END(cp, lockp) {				\
564 	ASSERT(MUTEX_HELD((cp)->cc_lockp));			\
565 }
566 
567 #define	CALLB_CPR_EXIT(cp) {					\
568 	ASSERT(MUTEX_HELD((cp)->cc_lockp));			\
569 	mutex_exit((cp)->cc_lockp);				\
570 }
571 
572 #define	zone_dataset_visible(x, y)	(1)
573 #define	INGLOBALZONE(z)			(1)
574 
575 extern char *kmem_asprintf(const char *fmt, ...);
576 #define	strfree(str) kmem_free((str), strlen(str) + 1)
577 
578 /*
579  * Hostname information
580  */
581 extern char hw_serial[];	/* for userland-emulated hostid access */
582 extern int ddi_strtoul(const char *str, char **nptr, int base,
583     unsigned long *result);
584 
585 extern int ddi_strtoull(const char *str, char **nptr, int base,
586     u_longlong_t *result);
587 
588 /* ZFS Boot Related stuff. */
589 
590 struct _buf {
591 	intptr_t	_fd;
592 };
593 
594 struct bootstat {
595 	uint64_t st_size;
596 };
597 
598 typedef struct ace_object {
599 	uid_t		a_who;
600 	uint32_t	a_access_mask;
601 	uint16_t	a_flags;
602 	uint16_t	a_type;
603 	uint8_t		a_obj_type[16];
604 	uint8_t		a_inherit_obj_type[16];
605 } ace_object_t;
606 
607 
608 #define	ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE	0x05
609 #define	ACE_ACCESS_DENIED_OBJECT_ACE_TYPE	0x06
610 #define	ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE	0x07
611 #define	ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE	0x08
612 
613 extern struct _buf *kobj_open_file(char *name);
614 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
615     unsigned off);
616 extern void kobj_close_file(struct _buf *file);
617 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
618 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
619 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
620     cred_t *cr);
621 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
622 extern zoneid_t getzoneid(void);
623 
624 /* SID stuff */
625 typedef struct ksiddomain {
626 	uint_t	kd_ref;
627 	uint_t	kd_len;
628 	char	*kd_name;
629 } ksiddomain_t;
630 
631 ksiddomain_t *ksid_lookupdomain(const char *);
632 void ksiddomain_rele(ksiddomain_t *);
633 
634 #define	DDI_SLEEP	KM_SLEEP
635 #define	ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
636 	sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)
637 
638 /*
639  * Cyclic information
640  */
641 extern kmutex_t cpu_lock;
642 
643 typedef uintptr_t cyclic_id_t;
644 typedef uint16_t cyc_level_t;
645 typedef void (*cyc_func_t)(void *);
646 
647 #define	CY_LOW_LEVEL	0
648 #define	CY_INFINITY	INT64_MAX
649 #define	CYCLIC_NONE	((cyclic_id_t)0)
650 
651 typedef struct cyc_time {
652 	hrtime_t cyt_when;
653 	hrtime_t cyt_interval;
654 } cyc_time_t;
655 
656 typedef struct cyc_handler {
657 	cyc_func_t cyh_func;
658 	void *cyh_arg;
659 	cyc_level_t cyh_level;
660 } cyc_handler_t;
661 
662 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
663 extern void cyclic_remove(cyclic_id_t);
664 extern int cyclic_reprogram(cyclic_id_t, hrtime_t);
665 
666 /*
667  * Buf structure
668  */
669 #define	B_BUSY		0x0001
670 #define	B_DONE		0x0002
671 #define	B_ERROR		0x0004
672 #define	B_READ		0x0040	/* read when I/O occurs */
673 #define	B_WRITE		0x0100	/* non-read pseudo-flag */
674 
675 typedef struct buf {
676 	int	b_flags;
677 	size_t b_bcount;
678 	union {
679 		caddr_t b_addr;
680 	} b_un;
681 
682 	lldaddr_t	_b_blkno;
683 #define	b_lblkno	_b_blkno._f
684 	size_t	b_resid;
685 	size_t	b_bufsize;
686 	int	(*b_iodone)(struct buf *);
687 	int	b_error;
688 	void	*b_private;
689 } buf_t;
690 
691 extern void bioinit(buf_t *);
692 extern void biodone(buf_t *);
693 extern void bioerror(buf_t *, int);
694 extern int geterror(buf_t *);
695 
696 #ifdef	__cplusplus
697 }
698 #endif
699 
700 #endif	/* _SYS_ZFS_CONTEXT_H */
701