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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012, 2016 by Delphix. All rights reserved.
24 * Copyright (c) 2012, Joyent, Inc. All rights reserved.
27 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
30 #ifndef _SYS_ZFS_CONTEXT_H
31 #define _SYS_ZFS_CONTEXT_H
39 #define _SYS_CONDVAR_H
70 #include <sys/debug.h>
72 #include <sys/types.h>
74 #include <sys/atomic.h>
75 #include <sys/sysmacros.h>
76 #include <sys/bitmap.h>
77 #include <sys/resource.h>
78 #include <sys/byteorder.h>
82 #include <sys/mntent.h>
83 #include <sys/mnttab.h>
84 #include <sys/zfs_debug.h>
86 #include <sys/kstat.h>
87 #include <sys/u8_textprep.h>
88 #include <sys/kernel.h>
90 #include <sys/sysevent.h>
91 #include <sys/sysevent/eventdefs.h>
92 #include <sys/sysevent/dev.h>
93 #include <machine/atomic.h>
94 #include <sys/debug.h>
99 #define ZFS_EXPORTS_PATH "/etc/zfs/exports"
106 * Note that we are not using the debugging levels.
109 #define CE_CONT 0 /* continuation */
110 #define CE_NOTE 1 /* notice */
111 #define CE_WARN 2 /* warning */
112 #define CE_PANIC 3 /* panic */
113 #define CE_IGNORE 4 /* print nothing */
119 #define ZFS_LOG(...) do { } while (0)
121 typedef u_longlong_t rlim64_t;
122 #define RLIM64_INFINITY ((rlim64_t)-3)
125 extern void dprintf_setup(int *argc, char **argv);
126 #endif /* ZFS_DEBUG */
128 extern void cmn_err(int, const char *, ...);
129 extern void vcmn_err(int, const char *, __va_list);
130 extern void panic(const char *, ...) __NORETURN;
131 extern void vpanic(const char *, __va_list) __NORETURN;
133 #define fm_panic panic
138 * DTrace SDT probes have different signatures in userland than they do in
139 * the kernel. If they're being used in kernel code, re-define them out of
140 * existence for their counterparts in libzpool.
142 * Here's an example of how to use the set-error probes in userland:
143 * zfs$target:::set-error /arg0 == EBUSY/ {stack();}
145 * Here's an example of how to use DTRACE_PROBE probes in userland:
146 * If there is a probe declared as follows:
147 * DTRACE_PROBE2(zfs__probe_name, uint64_t, blkid, dnode_t *, dn);
148 * Then you can use it as follows:
149 * zfs$target:::probe2 /copyinstr(arg0) == "zfs__probe_name"/
150 * {printf("%u %p\n", arg1, arg2);}
155 #endif /* DTRACE_PROBE */
157 #define DTRACE_PROBE(a) \
163 #endif /* DTRACE_PROBE1 */
165 #define DTRACE_PROBE1(a, b, c) \
166 ZFS_PROBE1(#a, (unsigned long)c)
171 #endif /* DTRACE_PROBE2 */
173 #define DTRACE_PROBE2(a, b, c, d, e) \
174 ZFS_PROBE2(#a, (unsigned long)c, (unsigned long)e)
179 #endif /* DTRACE_PROBE3 */
181 #define DTRACE_PROBE3(a, b, c, d, e, f, g) \
182 ZFS_PROBE3(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g)
187 #endif /* DTRACE_PROBE4 */
189 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) \
190 ZFS_PROBE4(#a, (unsigned long)c, (unsigned long)e, (unsigned long)g, \
196 * We use the comma operator so that this macro can be used without much
197 * additional code. For example, "return (EINVAL);" becomes
198 * "return (SET_ERROR(EINVAL));". Note that the argument will be evaluated
199 * twice, so it should not have side effects (e.g. something like:
200 * "return (SET_ERROR(log_error(EINVAL, info)));" would log the error twice).
202 #define SET_ERROR(err) (ZFS_SET_ERROR(err), err)
205 #define DTRACE_PROBE(a) ((void)0)
206 #define DTRACE_PROBE1(a, b, c) ((void)0)
207 #define DTRACE_PROBE2(a, b, c, d, e) ((void)0)
208 #define DTRACE_PROBE3(a, b, c, d, e, f, g) ((void)0)
209 #define DTRACE_PROBE4(a, b, c, d, e, f, g, h, i) ((void)0)
211 #define SET_ERROR(err) (err)
212 #endif /* !illumos */
217 #define curthread ((void *)(uintptr_t)thr_self())
219 #define kpreempt(x) sched_yield()
221 typedef struct kthread kthread_t;
223 #define thread_create(stk, stksize, func, arg, len, pp, state, pri) \
224 zk_thread_create(func, arg)
225 #define thread_exit() thr_exit(NULL)
226 #define thread_join(t) panic("libzpool cannot join threads")
228 #define newproc(f, a, cid, pri, ctp, pid) (ENOSYS)
230 /* in libzpool, p0 exists only to have its address taken */
232 uintptr_t this_is_never_used_dont_dereference_it;
235 extern struct proc p0;
236 #define curproc (&p0)
240 extern kthread_t *zk_thread_create(void (*func)(void*), void *arg);
242 #define issig(why) (FALSE)
243 #define ISSIG(thr, why) (FALSE)
248 typedef struct kmutex {
250 boolean_t initialized;
254 #define MUTEX_DEFAULT USYNC_THREAD
256 #undef MUTEX_NOT_HELD
257 #define MUTEX_HELD(m) ((m)->m_owner == curthread)
258 #define MUTEX_NOT_HELD(m) (!MUTEX_HELD(m))
259 #define _mutex_held(m) pthread_mutex_isowned_np(m)
262 * Argh -- we have to get cheesy here because the kernel and userland
263 * have different signatures for the same routine.
265 //extern int _mutex_init(mutex_t *mp, int type, void *arg);
266 //extern int _mutex_destroy(mutex_t *mp);
267 //extern int _mutex_owned(mutex_t *mp);
269 #define mutex_init(mp, b, c, d) zmutex_init((kmutex_t *)(mp))
270 #define mutex_destroy(mp) zmutex_destroy((kmutex_t *)(mp))
271 #define mutex_owned(mp) zmutex_owned((kmutex_t *)(mp))
273 extern void zmutex_init(kmutex_t *mp);
274 extern void zmutex_destroy(kmutex_t *mp);
275 extern int zmutex_owned(kmutex_t *mp);
276 extern void mutex_enter(kmutex_t *mp);
277 extern void mutex_exit(kmutex_t *mp);
278 extern int mutex_tryenter(kmutex_t *mp);
279 extern void *mutex_owner(kmutex_t *mp);
284 typedef struct krwlock {
287 boolean_t initialized;
295 #define RW_DEFAULT USYNC_THREAD
298 #define RW_READ_HELD(x) ((x)->rw_owner == NULL && (x)->rw_count > 0)
301 #define RW_WRITE_HELD(x) ((x)->rw_owner == curthread)
302 #define RW_LOCK_HELD(x) rw_lock_held(x)
305 #define RW_LOCK_HELD(x) (RW_READ_HELD(x) || RW_WRITE_HELD(x))
307 extern void rw_init(krwlock_t *rwlp, char *name, int type, void *arg);
308 extern void rw_destroy(krwlock_t *rwlp);
309 extern void rw_enter(krwlock_t *rwlp, krw_t rw);
310 extern int rw_tryenter(krwlock_t *rwlp, krw_t rw);
311 extern int rw_tryupgrade(krwlock_t *rwlp);
312 extern void rw_exit(krwlock_t *rwlp);
313 extern int rw_lock_held(krwlock_t *rwlp);
314 #define rw_downgrade(rwlp) do { } while (0)
316 extern uid_t crgetuid(cred_t *cr);
317 extern uid_t crgetruid(cred_t *cr);
318 extern gid_t crgetgid(cred_t *cr);
319 extern int crgetngroups(cred_t *cr);
320 extern gid_t *crgetgroups(cred_t *cr);
323 * Condition variables
325 typedef cond_t kcondvar_t;
327 #define CV_DEFAULT USYNC_THREAD
328 #define CALLOUT_FLAG_ABSOLUTE 0x2
330 extern void cv_init(kcondvar_t *cv, char *name, int type, void *arg);
331 extern void cv_destroy(kcondvar_t *cv);
332 extern void cv_wait(kcondvar_t *cv, kmutex_t *mp);
333 extern clock_t cv_timedwait(kcondvar_t *cv, kmutex_t *mp, clock_t abstime);
334 extern clock_t cv_timedwait_hires(kcondvar_t *cvp, kmutex_t *mp, hrtime_t tim,
335 hrtime_t res, int flag);
336 extern void cv_signal(kcondvar_t *cv);
337 extern void cv_broadcast(kcondvar_t *cv);
340 * Thread-specific data
342 #define tsd_get(k) pthread_getspecific(k)
343 #define tsd_set(k, v) pthread_setspecific(k, v)
344 #define tsd_create(kp, d) pthread_key_create(kp, d)
345 #define tsd_destroy(kp) /* nothing */
350 #define KM_SLEEP UMEM_NOFAIL
351 #define KM_PUSHPAGE KM_SLEEP
352 #define KM_NOSLEEP UMEM_DEFAULT
353 #define KM_NORMALPRI 0 /* not needed with UMEM_DEFAULT */
354 #define KMC_NODEBUG UMC_NODEBUG
355 #define KMC_NOTOUCH 0 /* not needed for userland caches */
357 #define kmem_alloc(_s, _f) umem_alloc(_s, _f)
358 #define kmem_zalloc(_s, _f) umem_zalloc(_s, _f)
359 #define kmem_free(_b, _s) umem_free(_b, _s)
360 #define kmem_size() (physmem * PAGESIZE)
361 #define kmem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i) \
362 umem_cache_create(_a, _b, _c, _d, _e, _f, _g, _h, _i)
363 #define kmem_cache_destroy(_c) umem_cache_destroy(_c)
364 #define kmem_cache_alloc(_c, _f) umem_cache_alloc(_c, _f)
365 #define kmem_cache_free(_c, _b) umem_cache_free(_c, _b)
366 #define kmem_debugging() 0
367 #define kmem_cache_reap_active() (B_FALSE)
368 #define kmem_cache_reap_soon(_c) /* nothing */
369 #define kmem_cache_set_move(_c, _cb) /* nothing */
370 #define POINTER_INVALIDATE(_pp) /* nothing */
371 #define POINTER_IS_VALID(_p) 0
373 typedef umem_cache_t kmem_cache_t;
375 typedef enum kmem_cbrc {
386 typedef struct taskq taskq_t;
387 typedef uintptr_t taskqid_t;
388 typedef void (task_func_t)(void *);
390 typedef struct taskq_ent {
391 struct taskq_ent *tqent_next;
392 struct taskq_ent *tqent_prev;
393 task_func_t *tqent_func;
395 uintptr_t tqent_flags;
398 #define TQENT_FLAG_PREALLOC 0x1 /* taskq_dispatch_ent used */
400 #define TASKQ_PREPOPULATE 0x0001
401 #define TASKQ_CPR_SAFE 0x0002 /* Use CPR safe protocol */
402 #define TASKQ_DYNAMIC 0x0004 /* Use dynamic thread scheduling */
403 #define TASKQ_THREADS_CPU_PCT 0x0008 /* Scale # threads by # cpus */
404 #define TASKQ_DC_BATCH 0x0010 /* Mark threads as batch */
406 #define TQ_SLEEP KM_SLEEP /* Can block for memory */
407 #define TQ_NOSLEEP KM_NOSLEEP /* cannot block for memory; may fail */
408 #define TQ_NOQUEUE 0x02 /* Do not enqueue if can't dispatch */
409 #define TQ_FRONT 0x08 /* Queue in front */
411 #define TASKQID_INVALID ((taskqid_t)0)
413 extern taskq_t *system_taskq;
415 extern taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t);
416 #define taskq_create_proc(a, b, c, d, e, p, f) \
417 (taskq_create(a, b, c, d, e, f))
418 #define taskq_create_sysdc(a, b, d, e, p, dc, f) \
419 (taskq_create(a, b, maxclsyspri, d, e, f))
420 extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
421 extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
423 extern void taskq_destroy(taskq_t *);
424 extern void taskq_wait(taskq_t *);
425 extern void taskq_wait_id(taskq_t *, taskqid_t);
426 extern int taskq_member(taskq_t *, void *);
427 extern void system_taskq_init(void);
428 extern void system_taskq_fini(void);
430 #define taskq_dispatch_safe(tq, func, arg, flags, task) \
431 taskq_dispatch((tq), (func), (arg), (flags))
433 #define XVA_MAPSIZE 3
434 #define XVA_MAGIC 0x78766174
439 typedef struct vnode {
446 extern char *vn_dumpdir;
447 #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */
449 typedef struct xoptattr {
450 timestruc_t xoa_createtime; /* Create time of file */
453 uint8_t xoa_readonly;
455 uint8_t xoa_nounlink;
456 uint8_t xoa_immutable;
457 uint8_t xoa_appendonly;
459 uint8_t xoa_settable;
461 uint8_t xoa_av_quarantined;
462 uint8_t xoa_av_modified;
463 uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ];
469 typedef struct vattr {
470 uint_t va_mask; /* bit-mask of attributes */
471 u_offset_t va_size; /* file size in bytes */
475 typedef struct xvattr {
476 vattr_t xva_vattr; /* Embedded vattr structure */
477 uint32_t xva_magic; /* Magic Number */
478 uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */
479 uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */
480 uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */
481 uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */
482 xoptattr_t xva_xoptattrs; /* Optional attributes */
485 typedef struct vsecattr {
486 uint_t vsa_mask; /* See below */
487 int vsa_aclcnt; /* ACL entry count */
488 void *vsa_aclentp; /* pointer to ACL entries */
489 int vsa_dfaclcnt; /* default ACL entry count */
490 void *vsa_dfaclentp; /* pointer to default ACL entries */
491 size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */
494 #define AT_TYPE 0x00001
495 #define AT_MODE 0x00002
496 #define AT_UID 0x00004
497 #define AT_GID 0x00008
498 #define AT_FSID 0x00010
499 #define AT_NODEID 0x00020
500 #define AT_NLINK 0x00040
501 #define AT_SIZE 0x00080
502 #define AT_ATIME 0x00100
503 #define AT_MTIME 0x00200
504 #define AT_CTIME 0x00400
505 #define AT_RDEV 0x00800
506 #define AT_BLKSIZE 0x01000
507 #define AT_NBLOCKS 0x02000
508 #define AT_SEQ 0x08000
509 #define AT_XVATTR 0x10000
513 extern int fop_getattr(vnode_t *vp, vattr_t *vap);
515 #define VOP_CLOSE(vp, f, c, o, cr, ct) 0
516 #define VOP_PUTPAGE(vp, of, sz, fl, cr, ct) 0
517 #define VOP_GETATTR(vp, vap, cr) fop_getattr((vp), (vap));
519 #define VOP_FSYNC(vp, f, cr, ct) fsync((vp)->v_fd)
521 #define VN_RELE(vp) vn_close(vp, 0, NULL, NULL)
522 #define VN_RELE_ASYNC(vp, taskq) vn_close(vp, 0, NULL, NULL)
524 #define vn_lock(vp, type)
525 #define VOP_UNLOCK(vp, type)
527 extern int vn_open(char *path, int x1, int oflags, int mode, vnode_t **vpp,
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, int openflag, cred_t *cr, kthread_t *td);
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
539 extern vnode_t *rootdir;
541 #include <sys/file.h> /* for FREAD, FWRITE, etc */
542 #define FTRUNC O_TRUNC
547 #define ddi_get_lbolt() (gethrtime() >> 23)
548 #define ddi_get_lbolt64() (gethrtime() >> 23)
549 #define hz 119 /* frequency when using gethrtime() >> 23 for lbolt */
551 extern void delay(clock_t ticks);
553 #define SEC_TO_TICK(sec) ((sec) * hz)
554 #define NSEC_TO_TICK(nsec) ((nsec) / (NANOSEC / hz))
556 #define gethrestime_sec() time(NULL)
557 #define gethrestime(t) \
559 (t)->tv_sec = gethrestime_sec();\
564 #define boot_ncpus (sysconf(_SC_NPROCESSORS_ONLN))
566 #define minclsyspri 60
567 #define maxclsyspri 99
569 #define CPU_SEQID (thr_self() & (max_ncpus - 1))
575 #define ptob(x) ((x) * PAGESIZE)
578 extern uint64_t physmem;
580 extern int highbit64(uint64_t i);
581 extern int random_get_bytes(uint8_t *ptr, size_t len);
582 extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
584 extern void kernel_init(int);
585 extern void kernel_fini(void);
588 extern void nicenum(uint64_t num, char *buf, size_t);
589 extern void show_pool_stats(struct spa *);
590 extern int set_global_var(char *arg);
592 typedef struct callb_cpr {
596 #define CALLB_CPR_INIT(cp, lockp, func, name) { \
597 (cp)->cc_lockp = lockp; \
600 #define CALLB_CPR_SAFE_BEGIN(cp) { \
601 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
604 #define CALLB_CPR_SAFE_END(cp, lockp) { \
605 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
608 #define CALLB_CPR_EXIT(cp) { \
609 ASSERT(MUTEX_HELD((cp)->cc_lockp)); \
610 mutex_exit((cp)->cc_lockp); \
613 #define zone_dataset_visible(x, y) (1)
614 #define INGLOBALZONE(z) (1)
615 extern uint32_t zone_get_hostid(void *zonep);
617 extern char *kmem_asprintf(const char *fmt, ...);
618 #define strfree(str) kmem_free((str), strlen(str) + 1)
621 * Hostname information
623 extern struct utsname utsname;
624 extern char hw_serial[]; /* for userland-emulated hostid access */
625 extern int ddi_strtoul(const char *str, char **nptr, int base,
626 unsigned long *result);
628 extern int ddi_strtoull(const char *str, char **nptr, int base,
629 u_longlong_t *result);
631 /* ZFS Boot Related stuff. */
641 typedef struct ace_object {
643 uint32_t a_access_mask;
646 uint8_t a_obj_type[16];
647 uint8_t a_inherit_obj_type[16];
651 #define ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05
652 #define ACE_ACCESS_DENIED_OBJECT_ACE_TYPE 0x06
653 #define ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07
654 #define ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08
656 extern struct _buf *kobj_open_file(char *name);
657 extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
659 extern void kobj_close_file(struct _buf *file);
660 extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
661 extern int zfs_secpolicy_snapshot_perms(const char *name, cred_t *cr);
662 extern int zfs_secpolicy_rename_perms(const char *from, const char *to,
664 extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
665 extern zoneid_t getzoneid(void);
666 /* Random compatibility stuff. */
667 #define pwrite64(d, p, n, o) pwrite(d, p, n, o)
668 #define readdir64(d) readdir(d)
669 #define SIGPENDING(td) (0)
670 #define root_mount_wait() do { } while (0)
671 #define root_mounted() (1)
677 #define FCREAT O_CREAT
681 typedef struct ksiddomain {
687 ksiddomain_t *ksid_lookupdomain(const char *);
688 void ksiddomain_rele(ksiddomain_t *);
690 typedef uint32_t idmap_rid_t;
692 #define DDI_SLEEP KM_SLEEP
693 #define ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) (0)
695 #define SX_SYSINIT(name, lock, desc)
697 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, \
698 intptr_t arg2, struct sysctl_req *req
701 * This describes the access space for a sysctl request. This is needed
702 * so that we can use the interface from the kernel or from user-space.
705 struct thread *td; /* used for access checking */
706 int lock; /* wiring state */
710 int (*oldfunc)(struct sysctl_req *, const void *, size_t);
714 int (*newfunc)(struct sysctl_req *, void *, size_t);
719 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
722 * This describes one "oid" in the MIB tree. Potentially more nodes can
723 * be hidden behind it, expanded by the handler.
726 struct sysctl_oid_list *oid_parent;
727 SLIST_ENTRY(sysctl_oid) oid_link;
732 const char *oid_name;
733 int (*oid_handler)(SYSCTL_HANDLER_ARGS);
737 const char *oid_descr;
740 #define SYSCTL_DECL(...)
741 #define SYSCTL_NODE(...)
742 #define SYSCTL_INT(...)
743 #define SYSCTL_UINT(...)
744 #define SYSCTL_ULONG(...)
745 #define SYSCTL_PROC(...)
746 #define SYSCTL_QUAD(...)
747 #define SYSCTL_UQUAD(...)
753 #define TUNABLE_INT(...)
754 #define TUNABLE_ULONG(...)
755 #define TUNABLE_QUAD(...)
757 int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
762 #define ERESTART (-1)
769 extern kmutex_t cpu_lock;
771 typedef uintptr_t cyclic_id_t;
772 typedef uint16_t cyc_level_t;
773 typedef void (*cyc_func_t)(void *);
775 #define CY_LOW_LEVEL 0
776 #define CY_INFINITY INT64_MAX
777 #define CYCLIC_NONE ((cyclic_id_t)0)
779 typedef struct cyc_time {
781 hrtime_t cyt_interval;
784 typedef struct cyc_handler {
787 cyc_level_t cyh_level;
790 extern cyclic_id_t cyclic_add(cyc_handler_t *, cyc_time_t *);
791 extern void cyclic_remove(cyclic_id_t);
792 extern int cyclic_reprogram(cyclic_id_t, hrtime_t);
799 #define B_BUSY 0x0001
800 #define B_DONE 0x0002
801 #define B_ERROR 0x0004
802 #define B_READ 0x0040 /* read when I/O occurs */
803 #define B_WRITE 0x0100 /* non-read pseudo-flag */
813 #define b_lblkno _b_blkno._f
816 int (*b_iodone)(struct buf *);
821 extern void bioinit(buf_t *);
822 extern void biodone(buf_t *);
823 extern void bioerror(buf_t *, int);
824 extern int geterror(buf_t *);
831 #endif /* _SYS_ZFS_CONTEXT_H */