2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)vnode.h 8.7 (Berkeley) 2/4/94
34 * $FreeBSD: src/sys/sys/vnode.h,v 1.111.2.19 2002/12/29 18:19:53 dillon Exp $
35 * $DragonFly: src/sys/sys/vnode.h,v 1.82 2008/07/12 01:09:45 dillon Exp $
41 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
44 #include <sys/queue.h>
49 #ifndef _SYS_SELINFO_H_
50 #include <sys/selinfo.h>
52 #ifndef _SYS_BIOTRACK_H_
53 #include <sys/biotrack.h>
61 #ifndef _SYS_NAMECACHE_H_
62 #include <sys/namecache.h>
64 #ifndef _SYS_THREAD_H_
65 #include <sys/thread.h>
67 #ifndef _SYS_VFSOPS_H_
68 #include <sys/vfsops.h>
70 #ifndef _SYS_VFSCACHE_H_
71 #include <sys/vfscache.h>
76 #ifndef _SYS_SYSLINK_RPC_H_
77 #include <sys/syslink_rpc.h>
79 #ifndef _SYS_SYSREF_H_
80 #include <sys/sysref.h>
85 #ifndef _MACHINE_LOCK_H_
86 #include <machine/lock.h>
90 * The vnode is the focus of all file activity in UNIX. There is a
91 * unique vnode allocated for each active file, each current directory,
92 * each mounted-on file, text file, and the root.
96 * Each underlying filesystem allocates its own private area and hangs
97 * it from v_data. If non-null, this area is freed in getnewvnode().
99 TAILQ_HEAD(buflists
, buf
);
102 * Range locks protect offset ranges in files and directories at a high
103 * level, allowing the actual I/O to be broken down into smaller pieces.
104 * Range locks will eventually be integrated into the clustered cache
105 * coherency infrastructure.
107 * We use a simple data structure for now, but eventually this should
108 * probably be a btree or red-black tree.
112 TAILQ_HEAD(vrangelock_list
, vrangelock
);
115 struct vrangelock_list vh_list
;
119 TAILQ_ENTRY(vrangelock
) vr_node
;
125 #define RNGL_WAITING 0x0001 /* waiting for lock, else has lock */
126 #define RNGL_CHECK 0x0002 /* check for work on unlock */
127 #define RNGL_SHARED 0x0004 /* shared lock, else exclusive */
128 #define RNGL_ONLIST 0x0008 /* sanity check */
132 vrange_init(struct vrangelock
*vr
, int flags
, off_t offset
, off_t length
)
134 vr
->vr_flags
= flags
;
135 vr
->vr_offset
= offset
;
136 vr
->vr_length
= length
;
141 void vrange_lock(struct vnode
*vp
, struct vrangelock
*vr
);
142 void vrange_unlock(struct vnode
*vp
, struct vrangelock
*vr
);
146 vrange_lock_shared(struct vnode
*vp
, struct vrangelock
*vr
,
147 off_t offset
, off_t length
)
149 vrange_init(vr
, RNGL_SHARED
, offset
, length
);
155 vrange_lock_excl(struct vnode
*vp
, struct vrangelock
*vr
,
156 off_t offset
, off_t length
)
158 vrange_init(vr
, 0, offset
, length
);
165 * The vnode infrastructure is being reorgranized. Most reference-related
166 * fields are locked by the BGL, and most file I/O related operations and
167 * vnode teardown functions are locked by the vnode lock.
169 * File read operations require a shared lock, file write operations require
170 * an exclusive lock. Most directory operations (read or write) currently
171 * require an exclusive lock due to the side effects stored in the directory
172 * inode (which we intend to fix).
174 * File reads and writes are further protected by a range lock. The intention
175 * is to be able to break I/O operations down into more easily managed pieces
176 * so vm_page arrays can be passed through rather then UIOs. This work will
177 * occur in multiple stages. The range locks will also eventually be used to
178 * deal with clustered cache coherency issues and, more immediately, to
179 * protect operations associated with the kernel-managed journaling module.
181 * NOTE: The vnode operations vector, v_ops, is a double-indirect that
182 * typically points to &v_mount->mnt_vn_use_ops. We use a double
183 * pointer because mnt_vn_use_ops may change dynamically when e.g.
184 * journaling is turned on or off.
186 * NOTE: v_filesize is currently only applicable when a VM object is
187 * associated with the vnode. Otherwise it will be set to NOOFFSET.
189 RB_HEAD(buf_rb_tree
, buf
);
190 RB_HEAD(buf_rb_hash
, buf
);
193 int v_flag
; /* vnode flags (see below) */
195 int v_opencount
; /* number of explicit opens */
196 int v_auxrefs
; /* auxiliary references */
197 struct sysref v_sysref
; /* normal references */
198 struct bio_track v_track_read
; /* track I/O's in progress */
199 struct bio_track v_track_write
; /* track I/O's in progress */
200 struct mount
*v_mount
; /* ptr to vfs we are in */
201 struct vop_ops
**v_ops
; /* vnode operations vector */
202 TAILQ_ENTRY(vnode
) v_freelist
; /* vnode freelist */
203 TAILQ_ENTRY(vnode
) v_nmntvnodes
; /* vnodes for mount point */
204 struct buf_rb_tree v_rbclean_tree
; /* RB tree of clean bufs */
205 struct buf_rb_tree v_rbdirty_tree
; /* RB tree of dirty bufs */
206 struct buf_rb_hash v_rbhash_tree
; /* RB tree general lookup */
207 LIST_ENTRY(vnode
) v_synclist
; /* vnodes with dirty buffers */
208 enum vtype v_type
; /* vnode type */
210 struct socket
*vu_socket
; /* unix ipc (VSOCK) */
212 int vu_umajor
; /* device number for attach */
214 struct cdev
*vu_cdevinfo
; /* device (VCHR, VBLK) */
215 SLIST_ENTRY(vnode
) vu_cdevnext
;
217 struct fifoinfo
*vu_fifoinfo
; /* fifo (VFIFO) */
219 off_t v_filesize
; /* file EOF or NOOFFSET */
220 off_t v_lazyw
; /* lazy write iterator */
221 off_t v_lastw
; /* last write (write cluster) */
222 off_t v_cstart
; /* start block of cluster */
223 off_t v_lasta
; /* last allocation */
224 int v_clen
; /* length of current cluster */
225 struct vm_object
*v_object
; /* Place to store VM object */
226 struct lock v_lock
; /* file/dir ops lock */
227 enum vtagtype v_tag
; /* type of underlying data */
228 void *v_data
; /* private data for fs */
229 struct namecache_list v_namecache
; /* associated nc entries */
231 struct lwkt_token vpi_token
; /* lock to protect below */
232 struct selinfo vpi_selinfo
; /* identity of poller(s) */
233 short vpi_events
; /* what they are looking for */
234 short vpi_revents
; /* what has happened */
236 struct vmresident
*v_resident
; /* optional vmresident */
237 struct vrangehead v_range
; /* range lock */
238 struct ccms_dataspace v_ccms
; /* cache coherency */
240 const char *filename
; /* Source file doing locking */
241 int line
; /* Line number doing locking */
245 #define v_socket v_un.vu_socket
246 #define v_umajor v_un.vu_cdev.vu_umajor
247 #define v_uminor v_un.vu_cdev.vu_uminor
248 #define v_rdev v_un.vu_cdev.vu_cdevinfo
249 #define v_cdevnext v_un.vu_cdev.vu_cdevnext
250 #define v_fifoinfo v_un.vu_fifoinfo
251 #define v_spinlock v_lock.lk_spinlock
253 #define VN_POLLEVENT(vp, events) \
255 if ((vp)->v_pollinfo.vpi_events & (events)) \
256 vn_pollevent((vp), (events)); \
262 #define VROOT 0x00001 /* root of its file system */
263 #define VTEXT 0x00002 /* vnode is a pure text prototype */
264 #define VSYSTEM 0x00004 /* vnode being used by kernel */
265 #define VISTTY 0x00008 /* vnode represents a tty */
266 #define VCTTYISOPEN 0x00010 /* controlling terminal tty is open */
267 #define VCKPT 0x00020 /* checkpoint-restored vnode */
268 #define VFSMID 0x00040 /* request FSMID update */
269 #define VMAYHAVELOCKS 0x00080 /* there may be posix or flock locks on vp */
270 /* open for business 0x00100 */
271 /* open for business 0x00200 */
272 /* open for business 0x00400 */
273 /* open for business 0x00800 */
274 #define VCACHED 0x01000 /* No active references but has cache value */
275 #define VOBJBUF 0x02000 /* Allocate buffers in VM object */
276 #define VINACTIVE 0x04000 /* The vnode is inactive (did VOP_INACTIVE) */
277 #define VAGE 0x08000 /* Insert vnode at head of free list */
278 #define VOLOCK 0x10000 /* vnode is locked waiting for an object */
279 #define VOWANT 0x20000 /* a process is waiting for VOLOCK */
280 #define VRECLAIMED 0x40000 /* This vnode has been destroyed */
281 #define VFREE 0x80000 /* This vnode is on the freelist */
282 /* open for business 0x100000 */
283 #define VONWORKLST 0x200000 /* On syncer work-list */
284 #define VMOUNT 0x400000 /* Mount in progress */
285 #define VOBJDIRTY 0x800000 /* object might be dirty */
288 * vmntvnodescan() flags
290 #define VMSC_GETVP 0x01
291 #define VMSC_GETVX 0x02
292 #define VMSC_NOWAIT 0x10
293 #define VMSC_ONEPASS 0x20
296 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
297 * help with write clustering)
299 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
300 #define IO_APPEND 0x0002 /* append write to end */
301 #define IO_SYNC 0x0004 /* do I/O synchronously */
302 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
303 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
304 #define IO_VMIO 0x0020 /* data already in VMIO space */
305 #define IO_INVAL 0x0040 /* invalidate after I/O */
306 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
307 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
308 #define IO_UNUSED0200 0x0200
309 #define IO_CORE 0x0400 /* I/O is part of core dump */
311 #define IO_SEQMAX 0x7F /* seq heuristic max value */
312 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
315 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID,
316 * and SVTX flag bits.
318 * VCREATE, VDELETE, and VEXCL may only be used in naccess() calls.
320 #define VDELETE 040000 /* delete if the file/dir exists */
321 #define VCREATE 020000 /* create if the file/dir does not exist */
322 #define VEXCL 010000 /* error if the file/dir already exists */
324 #define VSUID 04000 /* set user id on execution */
325 #define VSGID 02000 /* set group id on execution */
326 #define VSVTX 01000 /* save swapped text even after use */
327 #define VREAD 00400 /* read, write, execute permissions */
332 * Token indicating no attribute value yet assigned.
337 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
339 #define VLKTIMEOUT (hz / 20 + 1)
344 * Convert between vnode types and inode formats (since POSIX.1
345 * defines mode word of stat structure in terms of inode formats).
347 extern enum vtype iftovt_tab
[];
348 extern int vttoif_tab
[];
349 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
350 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
351 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
354 * Flags to various vnode functions.
356 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
357 #define FORCECLOSE 0x0002 /* vflush: force file closure */
358 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
359 #define DOCLOSE 0x0008 /* vclean: close active files */
360 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
361 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
364 #define VATTR_NULL(vap) vattr_null(vap)
366 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
367 #endif /* DIAGNOSTIC */
369 #define NULLVP ((struct vnode *)NULL)
371 #define VNODEOP_SET(f) \
372 SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \
373 SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f);
380 extern struct vnode
*rootvnode
; /* root (i.e. "/") vnode */
381 extern struct nchandle rootnch
; /* root (i.e. "/") namecache */
382 extern int desiredvnodes
; /* number of vnodes desired */
383 extern time_t syncdelay
; /* max time to delay syncing data */
384 extern time_t filedelay
; /* time to delay syncing files */
385 extern time_t dirdelay
; /* time to delay syncing directories */
386 extern time_t metadelay
; /* time to delay syncing metadata */
387 extern struct objcache
*namei_oc
;
388 extern int prtactive
; /* nonzero to call vprint() */
389 extern struct vattr va_null
; /* predefined null vattr structure */
390 extern int vfs_ioopt
;
391 extern int numvnodes
;
392 extern int freevnodes
;
393 extern int vfs_fastdev
; /* fast specfs device access */
396 * Interlock for scanning list of vnodes attached to a mountpoint
398 extern struct lwkt_token mntvnode_token
;
401 * This macro is very helpful in defining those offsets in the vdesc struct.
403 * This is stolen from X11R4. I ignored all the fancy stuff for
404 * Crays, so if you decide to port this to such a serious machine,
405 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
407 #define VOPARG_OFFSET(p_type,field) \
408 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
409 #define VOPARG_OFFSETOF(s_type,field) \
410 VOPARG_OFFSET(s_type*,field)
411 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
412 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
414 typedef int (*vnodeopv_entry_t
)(struct vop_generic_args
*);
417 * VOCALL calls an op given an ops vector. We break it out because BSD's
418 * vclean changes the ops vector and then wants to call ops with the old
422 typedef int (*vocall_func_t
)(struct vop_generic_args
*);
425 * This call executes the vops vector for the offset stored in the ap's
426 * descriptor of the passed vops rather then the one related to the
427 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of
428 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
431 #define VOCALL(vops, ap) \
432 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap)
434 #define VDESC(OP) (& __CONCAT(OP,_desc))
437 * Public vnode manipulation functions.
450 struct vnode
*getsynthvnode(const char *devname
);
451 void addaliasu (struct vnode
*vp
, int x
, int y
);
452 int v_associate_rdev(struct vnode
*vp
, cdev_t dev
);
453 void v_release_rdev(struct vnode
*vp
);
454 int bdevvp (cdev_t dev
, struct vnode
**vpp
);
455 struct vnode
*allocvnode(int lktimeout
, int lkflags
);
456 int freesomevnodes(int count
);
457 int getnewvnode (enum vtagtype tag
, struct mount
*mp
,
458 struct vnode
**vpp
, int timo
, int lkflags
);
459 int getspecialvnode (enum vtagtype tag
, struct mount
*mp
,
460 struct vop_ops
**ops
, struct vnode
**vpp
, int timo
,
462 int spec_vnoperate (struct vop_generic_args
*);
463 int speedup_syncer (void);
464 void vattr_null (struct vattr
*vap
);
465 int vcount (struct vnode
*vp
);
466 int vfinddev (cdev_t dev
, enum vtype type
, struct vnode
**vpp
);
467 void vfs_nadd_vnodeops_sysinit (void *);
468 void vfs_nrm_vnodeops_sysinit (void *);
469 void vfs_add_vnodeops(struct mount
*, struct vop_ops
*, struct vop_ops
**);
470 void vfs_rm_vnodeops(struct mount
*, struct vop_ops
*, struct vop_ops
**);
471 int vflush (struct mount
*mp
, int rootrefs
, int flags
);
472 int vmntvnodescan(struct mount
*mp
, int flags
,
473 int (*fastfunc
)(struct mount
*mp
, struct vnode
*vp
, void *data
),
474 int (*slowfunc
)(struct mount
*mp
, struct vnode
*vp
, void *data
),
476 void insmntque(struct vnode
*vp
, struct mount
*mp
);
478 void vclean_vxlocked (struct vnode
*vp
, int flags
);
479 void vclean_unlocked (struct vnode
*vp
);
480 void vgone_vxlocked (struct vnode
*vp
);
481 void vupdatefsmid (struct vnode
*vp
);
482 int vinvalbuf (struct vnode
*vp
, int save
, int slpflag
, int slptimeo
);
483 int vtruncbuf (struct vnode
*vp
, off_t length
, int blksize
);
484 int vfsync(struct vnode
*vp
, int waitfor
, int passes
,
485 int (*checkdef
)(struct buf
*),
486 int (*waitoutput
)(struct vnode
*, struct thread
*));
487 int vinitvmio(struct vnode
*vp
, off_t filesize
);
488 void vprint (char *label
, struct vnode
*vp
);
489 int vrecycle (struct vnode
*vp
);
490 int vmaxiosize (struct vnode
*vp
);
491 void vn_strategy(struct vnode
*vp
, struct bio
*bio
);
492 int vn_close (struct vnode
*vp
, int flags
);
493 int vn_isdisk (struct vnode
*vp
, int *errp
);
494 int vn_lock (struct vnode
*vp
, int flags
);
495 int vn_islocked (struct vnode
*vp
);
496 void vn_unlock (struct vnode
*vp
);
498 int debug_vn_lock (struct vnode
*vp
, int flags
,
499 const char *filename
, int line
);
500 #define vn_lock(vp,flags) debug_vn_lock(vp, flags, __FILE__, __LINE__)
503 int vn_get_namelen(struct vnode
*, int *);
504 void vn_setspecops (struct file
*fp
);
505 int vn_fullpath (struct proc
*p
, struct vnode
*vn
, char **retbuf
, char **freebuf
);
506 int vn_open (struct nlookupdata
*ndp
, struct file
*fp
, int fmode
, int cmode
);
507 int vn_opendisk (const char *devname
, int fmode
, struct vnode
**vpp
);
508 void vn_pollevent (struct vnode
*vp
, int events
);
509 void vn_pollgone (struct vnode
*vp
);
510 int vn_pollrecord (struct vnode
*vp
, int events
);
511 int vn_rdwr (enum uio_rw rw
, struct vnode
*vp
, caddr_t base
,
512 int len
, off_t offset
, enum uio_seg segflg
, int ioflg
,
513 struct ucred
*cred
, int *aresid
);
514 int vn_rdwr_inchunks (enum uio_rw rw
, struct vnode
*vp
, caddr_t base
,
515 int len
, off_t offset
, enum uio_seg segflg
, int ioflg
,
516 struct ucred
*cred
, int *aresid
);
517 int vn_stat (struct vnode
*vp
, struct stat
*sb
, struct ucred
*cred
);
518 cdev_t
vn_todev (struct vnode
*vp
);
519 void vfs_timestamp (struct timespec
*);
520 int vn_writechk (struct vnode
*vp
, struct nchandle
*nch
);
521 int ncp_writechk(struct nchandle
*nch
);
522 int vop_stdopen (struct vop_open_args
*ap
);
523 int vop_stdclose (struct vop_close_args
*ap
);
524 int vop_stdgetpages(struct vop_getpages_args
*ap
);
525 int vop_stdputpages(struct vop_putpages_args
*ap
);
526 int vop_nopoll (struct vop_poll_args
*ap
);
527 int vop_stdpathconf (struct vop_pathconf_args
*ap
);
528 int vop_stdpoll (struct vop_poll_args
*ap
);
529 int vop_stdrevoke (struct vop_revoke_args
*ap
);
530 int vop_eopnotsupp (struct vop_generic_args
*ap
);
531 int vop_ebadf (struct vop_generic_args
*ap
);
532 int vop_einval (struct vop_generic_args
*ap
);
533 int vop_enotty (struct vop_generic_args
*ap
);
534 int vop_defaultop (struct vop_generic_args
*ap
);
535 int vop_null (struct vop_generic_args
*ap
);
536 int vop_panic (struct vop_generic_args
*ap
);
537 int vop_write_dirent(int *, struct uio
*, ino_t
, uint8_t, uint16_t,
540 int vop_compat_nresolve(struct vop_nresolve_args
*ap
);
541 int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args
*ap
);
542 int vop_compat_ncreate(struct vop_ncreate_args
*ap
);
543 int vop_compat_nmkdir(struct vop_nmkdir_args
*ap
);
544 int vop_compat_nmknod(struct vop_nmknod_args
*ap
);
545 int vop_compat_nlink(struct vop_nlink_args
*ap
);
546 int vop_compat_nsymlink(struct vop_nsymlink_args
*ap
);
547 int vop_compat_nwhiteout(struct vop_nwhiteout_args
*ap
);
548 int vop_compat_nremove(struct vop_nremove_args
*ap
);
549 int vop_compat_nrmdir(struct vop_nrmdir_args
*ap
);
550 int vop_compat_nrename(struct vop_nrename_args
*ap
);
552 void vx_lock (struct vnode
*vp
);
553 void vx_unlock (struct vnode
*vp
);
554 void vx_get (struct vnode
*vp
);
555 int vx_get_nonblock (struct vnode
*vp
);
556 void vx_put (struct vnode
*vp
);
557 int vget (struct vnode
*vp
, int lockflag
);
558 void vput (struct vnode
*vp
);
559 void vhold (struct vnode
*);
560 void vdrop (struct vnode
*);
561 void vref (struct vnode
*vp
);
562 void vrele (struct vnode
*vp
);
563 void vsetflags (struct vnode
*vp
, int flags
);
564 void vclrflags (struct vnode
*vp
, int flags
);
566 void vfs_subr_init(void);
567 void vfs_mount_init(void);
568 void vfs_lock_init(void);
569 void vfs_sync_init(void);
571 void vn_syncer_add_to_worklist(struct vnode
*, int);
572 void vnlru_proc_wait(void);
574 extern struct vop_ops default_vnode_vops
;
575 extern struct vop_ops spec_vnode_vops
;
576 extern struct vop_ops dead_vnode_vops
;
578 extern struct vop_ops
*default_vnode_vops_p
;
579 extern struct vop_ops
*spec_vnode_vops_p
;
580 extern struct vop_ops
*dead_vnode_vops_p
;
584 #endif /* _KERNEL || _KERNEL_STRUCTURES */
585 #endif /* !_SYS_VNODE_H_ */