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 $
40 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
43 #include <sys/queue.h>
49 #include <sys/event.h>
51 #ifndef _SYS_BIOTRACK_H_
52 #include <sys/biotrack.h>
60 #ifndef _SYS_NAMECACHE_H_
61 #include <sys/namecache.h>
63 #ifndef _SYS_THREAD_H_
64 #include <sys/thread.h>
66 #ifndef _SYS_VFSOPS_H_
67 #include <sys/vfsops.h>
69 #ifndef _SYS_VFSCACHE_H_
70 #include <sys/vfscache.h>
75 #ifndef _SYS_SYSLINK_RPC_H_
76 #include <sys/syslink_rpc.h>
78 #ifndef _SYS_SYSREF_H_
79 #include <sys/sysref.h>
81 #ifndef _MACHINE_LOCK_H_
82 #include <machine/lock.h>
86 * The vnode is the focus of all file activity in UNIX. There is a
87 * unique vnode allocated for each active file, each current directory,
88 * each mounted-on file, text file, and the root.
92 * Each underlying filesystem allocates its own private area and hangs
93 * it from v_data. If non-null, this area is freed in getnewvnode().
95 TAILQ_HEAD(buflists, buf);
98 * Struct for mount options to printable formats.
100 struct mountctl_opt {
106 * The vnode infrastructure is being reorgranized. Most reference-related
107 * fields are locked by the BGL, and most file I/O related operations and
108 * vnode teardown functions are locked by the vnode lock.
110 * File read operations require a shared lock, file write operations require
111 * an exclusive lock. Most directory operations (read or write) currently
112 * require an exclusive lock due to the side effects stored in the directory
113 * inode (which we intend to fix).
115 * File reads and writes are further protected by a range lock. The intention
116 * is to be able to break I/O operations down into more easily managed pieces
117 * so vm_page arrays can be passed through rather then UIOs. This work will
118 * occur in multiple stages. The range locks will also eventually be used to
119 * deal with clustered cache coherency issues and, more immediately, to
120 * protect operations associated with the kernel-managed journaling module.
122 * NOTE: Certain fields within the vnode structure requires v_token to be
123 * held. The vnode's normal lock need not be held when accessing
124 * these fields as long as the vnode is deterministically referenced
125 * (i.e. can't be ripped out from under the caller). This is typical
126 * for code paths based on descriptors or file pointers, but not for
127 * backdoor code paths that come in via the buffer cache.
134 * NOTE: The vnode operations vector, v_ops, is a double-indirect that
135 * typically points to &v_mount->mnt_vn_use_ops. We use a double
136 * pointer because mnt_vn_use_ops may change dynamically when e.g.
137 * journaling is turned on or off.
139 * NOTE: v_filesize is currently only applicable when a VM object is
140 * associated with the vnode. Otherwise it will be set to NOOFFSET.
142 * NOTE: The following fields require a spin or token lock. Note that
143 * additional subsystems may use v_token or v_spin for other
144 * purposes, e.g. vfs/fifofs/fifo_vnops.c
149 RB_HEAD(buf_rb_tree, buf);
150 RB_HEAD(buf_rb_hash, buf);
153 struct spinlock v_spin;
154 int v_flag; /* vnode flags (see below) */
156 int v_opencount; /* number of explicit opens */
157 int v_auxrefs; /* auxiliary references */
159 struct bio_track v_track_read; /* track I/O's in progress */
160 struct bio_track v_track_write; /* track I/O's in progress */
161 struct mount *v_mount; /* ptr to vfs we are in */
162 struct vop_ops **v_ops; /* vnode operations vector */
163 TAILQ_ENTRY(vnode) v_list; /* vnode act/inact/cache/free */
164 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */
165 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */
166 struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */
167 struct buf_rb_tree v_rbdirty_tree; /* RB tree of dirty bufs */
168 struct buf_rb_hash v_rbhash_tree; /* RB tree general lookup */
169 enum vtype v_type; /* vnode type */
170 int16_t v_act; /* use heuristic */
171 int16_t v_state; /* active/free/cached */
173 struct socket *vu_socket; /* unix ipc (VSOCK) */
175 int vu_umajor; /* device number for attach */
177 struct cdev *vu_cdevinfo; /* device (VCHR, VBLK) */
178 SLIST_ENTRY(vnode) vu_cdevnext;
180 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
182 off_t v_filesize; /* file EOF or NOOFFSET */
183 off_t v_lazyw; /* lazy write iterator */
184 struct vm_object *v_object; /* Place to store VM object */
185 struct lock v_lock; /* file/dir ops lock */
186 struct lwkt_token v_token; /* (see above) */
187 enum vtagtype v_tag; /* type of underlying data */
188 void *v_data; /* private data for fs */
189 struct namecache_list v_namecache; /* (S) associated nc entries */
191 struct kqinfo vpi_kqinfo; /* identity of poller(s) */
193 struct vmresident *v_resident; /* optional vmresident */
194 struct mount *v_pfsmp; /* real mp for pfs/nullfs mt */
196 const char *filename; /* Source file doing locking */
197 int line; /* Line number doing locking */
200 #define v_socket v_un.vu_socket
201 #define v_umajor v_un.vu_cdev.vu_umajor
202 #define v_uminor v_un.vu_cdev.vu_uminor
203 #define v_rdev v_un.vu_cdev.vu_cdevinfo
204 #define v_cdevnext v_un.vu_cdev.vu_cdevnext
205 #define v_fifoinfo v_un.vu_fifoinfo
210 #define VROOT 0x00000001 /* root of its file system */
211 #define VTEXT 0x00000002 /* vnode is a pure text prototype */
212 #define VSYSTEM 0x00000004 /* vnode being used by kernel */
213 #define VISTTY 0x00000008 /* vnode represents a tty */
214 #define VCTTYISOPEN 0x00000010 /* controlling terminal tty is open */
215 #define VCKPT 0x00000020 /* checkpoint-restored vnode */
216 /* open for business 0x00000040 */
217 #define VMAYHAVELOCKS 0x00000080 /* maybe posix or flock locks on vp */
218 #define VPFSROOT 0x00000100 /* may be a pseudo filesystem root */
219 /* open for business 0x00000200 */
220 #define VAGE0 0x00000400 /* Age count for recycling - 2 bits */
221 #define VAGE1 0x00000800 /* Age count for recycling - 2 bits */
222 /* open for business 0x00001000 */
223 #define VOBJBUF 0x00002000 /* Allocate buffers in VM object */
224 #define VINACTIVE 0x00004000 /* ran VOP_INACTIVE */
225 /* open for business 0x00008000 */
226 /* open for business 0x00010000 */
227 /* open for business 0x00020000 */
228 #define VRECLAIMED 0x00040000 /* This vnode has been destroyed */
229 /* open for business 0x00080000 */
230 #define VNOTSEEKABLE 0x00100000 /* rd/wr ignores file offset */
231 #define VONWORKLST 0x00200000 /* On syncer work-list */
232 #define VISDIRTY 0x00400000 /* inode dirty from VFS */
233 #define VOBJDIRTY 0x00800000 /* object might be dirty */
234 #define VSWAPCACHE 0x01000000 /* enable swapcache */
235 /* open for business 0x02000000 */
236 /* open for business 0x04000000 */
239 * v_state flags (v_state is interlocked by v_spin and vfs_spin)
243 #define VS_INACTIVE 2
247 * v_refcnt uses bit 30 to flag that 1->0 transitions require finalization
248 * (actual deactivation) and bit 31 to indicate that deactivation is in
251 * The VREFCNT() macro returns a negative number if the vnode is undergoing
252 * termination (value should not be interpreted beyond being negative),
253 * zero if it is cached and has no references, or a positive number
254 * indicating the number of refs.
256 #define VREF_TERMINATE 0x80000000 /* termination in progress */
257 #define VREF_FINALIZE 0x40000000 /* deactivate on last vrele */
258 #define VREF_MASK 0xBFFFFFFF /* includes VREF_TERMINATE */
260 #define VREFCNT(vp) ((int)((vp)->v_refcnt & VREF_MASK))
263 * vmntvnodescan() flags
265 #define VMSC_GETVP 0x01
266 #define VMSC_GETVX 0x02
267 #define VMSC_NOWAIT 0x10
268 #define VMSC_ONEPASS 0x20
271 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
272 * help with write clustering)
274 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
275 #define IO_APPEND 0x0002 /* append write to end */
276 #define IO_SYNC 0x0004 /* do I/O synchronously */
277 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
278 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
279 #define IO_VMIO 0x0020 /* data already in VMIO space */
280 #define IO_INVAL 0x0040 /* invalidate after I/O */
281 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
282 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
283 #define IO_RECURSE 0x0200 /* possibly device-recursive (vn) */
284 #define IO_CORE 0x0400 /* I/O is part of core dump */
285 #define IO_NRDELAY 0x0800 /* do not block on disk reads */
287 #define IO_SEQMAX 0x7F /* seq heuristic max value */
288 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
291 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID,
292 * and SVTX flag bits.
294 #define VSUID 04000 /* set user id on execution */
295 #define VSGID 02000 /* set group id on execution */
296 #define VSVTX 01000 /* save swapped text even after use */
297 #define VREAD 00400 /* read, write, execute permissions */
302 * Token indicating no attribute value yet assigned.
307 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
309 #define VLKTIMEOUT (hz / 20 + 1)
314 * Convert between vnode types and inode formats (since POSIX.1
315 * defines mode word of stat structure in terms of inode formats).
317 extern enum vtype iftovt_tab[];
318 extern int vttoif_tab[];
319 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
320 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
321 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
324 * Flags to various vnode functions.
326 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
327 #define FORCECLOSE 0x0002 /* vflush: force file closure */
328 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
329 #define DOCLOSE 0x0008 /* vclean: close active files */
330 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
333 #define VATTR_NULL(vap) vattr_null(vap)
335 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
336 #endif /* DIAGNOSTIC */
338 #define NULLVP ((struct vnode *)NULL)
340 #define VNODEOP_SET(f) \
341 SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \
342 SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f);
349 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
350 extern struct nchandle rootnch; /* root (i.e. "/") namecache */
351 extern int desiredvnodes; /* number of vnodes desired */
352 extern time_t syncdelay; /* max time to delay syncing data */
353 extern time_t filedelay; /* time to delay syncing files */
354 extern time_t dirdelay; /* time to delay syncing directories */
355 extern time_t metadelay; /* time to delay syncing metadata */
356 extern struct objcache *namei_oc;
357 extern int prtactive; /* nonzero to call vprint() */
358 extern struct vattr va_null; /* predefined null vattr structure */
359 extern int numvnodes;
360 extern int inactivevnodes;
361 extern int activevnodes;
362 extern int cachedvnodes;
365 * This macro is very helpful in defining those offsets in the vdesc struct.
367 * This is stolen from X11R4. I ignored all the fancy stuff for
368 * Crays, so if you decide to port this to such a serious machine,
369 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
371 #define VOPARG_OFFSET(p_type,field) \
372 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
373 #define VOPARG_OFFSETOF(s_type,field) \
374 VOPARG_OFFSET(s_type*,field)
375 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
376 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
378 typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
381 * VOCALL calls an op given an ops vector. We break it out because BSD's
382 * vclean changes the ops vector and then wants to call ops with the old
386 typedef int (*vocall_func_t)(struct vop_generic_args *);
389 * This call executes the vops vector for the offset stored in the ap's
390 * descriptor of the passed vops rather then the one related to the
391 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of
392 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
395 #define VOCALL(vops, ap) \
396 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap)
398 #define VDESC(OP) (& __CONCAT(OP,_desc))
401 * Public vnode manipulation functions.
415 struct vnode *getsynthvnode(const char *devname);
416 void addaliasu (struct vnode *vp, int x, int y);
417 int v_associate_rdev(struct vnode *vp, cdev_t dev);
418 void v_release_rdev(struct vnode *vp);
419 int bdevvp (cdev_t dev, struct vnode **vpp);
420 struct vnode *allocvnode(int lktimeout, int lkflags);
421 void allocvnode_gc(void);
422 int freesomevnodes(int count);
423 int getnewvnode (enum vtagtype tag, struct mount *mp,
424 struct vnode **vpp, int timo, int lkflags);
425 int getspecialvnode (enum vtagtype tag, struct mount *mp,
426 struct vop_ops **ops, struct vnode **vpp, int timo,
428 void speedup_syncer (struct mount *mp);
429 int vaccess(enum vtype, mode_t, uid_t, gid_t, mode_t, struct ucred *);
430 void vattr_null (struct vattr *vap);
431 int vcount (struct vnode *vp);
432 int vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp);
433 void vfs_nadd_vnodeops_sysinit (void *);
434 void vfs_nrm_vnodeops_sysinit (void *);
435 void vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
436 void vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
437 int vflush (struct mount *mp, int rootrefs, int flags);
439 int vmntvnodescan(struct mount *mp, int flags,
440 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
441 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
443 int vsyncscan(struct mount *mp, int flags,
444 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
446 void vclrisdirty(struct vnode *vp);
447 void vclrobjdirty(struct vnode *vp);
448 void vsetisdirty(struct vnode *vp);
449 void vsetobjdirty(struct vnode *vp);
451 void insmntque(struct vnode *vp, struct mount *mp);
453 void vclean_vxlocked (struct vnode *vp, int flags);
454 void vclean_unlocked (struct vnode *vp);
455 void vgone_vxlocked (struct vnode *vp);
456 int vrevoke (struct vnode *vp, struct ucred *cred);
457 int vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo);
458 int vtruncbuf (struct vnode *vp, off_t length, int blksize);
459 void vnode_pager_setsize (struct vnode *, vm_ooffset_t);
460 int nvtruncbuf (struct vnode *vp, off_t length, int blksize, int boff,
462 int nvextendbuf(struct vnode *vp, off_t olength, off_t nlength,
463 int oblksize, int nblksize,
464 int oboff, int nboff, int trivial);
465 void nvnode_pager_setsize (struct vnode *vp, off_t length,
466 int blksize, int boff);
467 int vfsync(struct vnode *vp, int waitfor, int passes,
468 int (*checkdef)(struct buf *),
469 int (*waitoutput)(struct vnode *, struct thread *));
470 int vinitvmio(struct vnode *vp, off_t filesize, int blksize, int boff);
471 void vprint (char *label, struct vnode *vp);
472 int vrecycle (struct vnode *vp);
473 int vmaxiosize (struct vnode *vp);
474 void vn_strategy(struct vnode *vp, struct bio *bio);
475 int vn_cache_strategy(struct vnode *vp, struct bio *bio);
476 int vn_close (struct vnode *vp, int flags, struct file *fp);
477 void vn_gone (struct vnode *vp);
478 int vn_isdisk (struct vnode *vp, int *errp);
479 int vn_islocked (struct vnode *vp);
480 int vn_islocked_unlock (struct vnode *vp);
481 void vn_islocked_relock (struct vnode *vp, int vpls);
482 int vn_lock (struct vnode *vp, int flags);
483 void vn_unlock (struct vnode *vp);
486 int debug_vn_lock (struct vnode *vp, int flags,
487 const char *filename, int line);
488 #define vn_lock(vp,flags) debug_vn_lock(vp, flags, __FILE__, __LINE__)
491 /*#define DEBUG_VN_UNLOCK*/
492 #ifdef DEBUG_VN_UNLOCK
493 void debug_vn_unlock (struct vnode *vp,
494 const char *filename, int line);
495 #define vn_unlock(vp) debug_vn_unlock(vp, __FILE__, __LINE__)
498 int vn_get_namelen(struct vnode *, int *);
499 void vn_setspecops (struct file *fp);
500 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf, int guess);
501 int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
502 int vn_opendisk (const char *devname, int fmode, struct vnode **vpp);
503 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
504 int len, off_t offset, enum uio_seg segflg, int ioflg,
505 struct ucred *cred, int *aresid);
506 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
507 int len, off_t offset, enum uio_seg segflg, int ioflg,
508 struct ucred *cred, int *aresid);
509 int vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred);
510 cdev_t vn_todev (struct vnode *vp);
511 void vfs_timestamp (struct timespec *);
512 size_t vfs_flagstostr(int flags, const struct mountctl_opt *optp, char *buf, size_t len, int *errorp);
513 void vn_mark_atime(struct vnode *vp, struct thread *td);
514 int vn_writechk (struct vnode *vp, struct nchandle *nch);
515 int ncp_writechk(struct nchandle *nch);
516 int vop_stdopen (struct vop_open_args *ap);
517 int vop_stdclose (struct vop_close_args *ap);
518 int vop_stdmountctl(struct vop_mountctl_args *ap);
519 int vop_stdgetpages(struct vop_getpages_args *ap);
520 int vop_stdputpages(struct vop_putpages_args *ap);
521 int vop_stdmarkatime(struct vop_markatime_args *ap);
522 int vop_stdnoread(struct vop_read_args *ap);
523 int vop_stdnowrite(struct vop_write_args *ap);
524 int vop_stdpathconf (struct vop_pathconf_args *ap);
525 int vop_eopnotsupp (struct vop_generic_args *ap);
526 int vop_ebadf (struct vop_generic_args *ap);
527 int vop_einval (struct vop_generic_args *ap);
528 int vop_enotty (struct vop_generic_args *ap);
529 int vop_defaultop (struct vop_generic_args *ap);
530 int vop_null (struct vop_generic_args *ap);
531 int vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t,
534 int vop_compat_nresolve(struct vop_nresolve_args *ap);
535 int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
536 int vop_compat_ncreate(struct vop_ncreate_args *ap);
537 int vop_compat_nmkdir(struct vop_nmkdir_args *ap);
538 int vop_compat_nmknod(struct vop_nmknod_args *ap);
539 int vop_compat_nlink(struct vop_nlink_args *ap);
540 int vop_compat_nsymlink(struct vop_nsymlink_args *ap);
541 int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
542 int vop_compat_nremove(struct vop_nremove_args *ap);
543 int vop_compat_nrmdir(struct vop_nrmdir_args *ap);
544 int vop_compat_nrename(struct vop_nrename_args *ap);
546 void vx_lock (struct vnode *vp);
547 void vx_unlock (struct vnode *vp);
548 void vx_get (struct vnode *vp);
549 int vx_get_nonblock (struct vnode *vp);
550 void vx_put (struct vnode *vp);
551 int vget (struct vnode *vp, int lockflag);
552 void vput (struct vnode *vp);
553 void vhold (struct vnode *);
554 void vdrop (struct vnode *);
555 void vref (struct vnode *vp);
556 void vrele (struct vnode *vp);
557 void vsetflags (struct vnode *vp, int flags);
558 void vclrflags (struct vnode *vp, int flags);
560 /*#define DEBUG_VPUT*/
562 void debug_vput (struct vnode *vp, const char *filename, int line);
563 #define vput(vp) debug_vput(vp, __FILE__, __LINE__)
566 void vfs_subr_init(void);
567 void vfs_mount_init(void);
568 void vfs_lock_init(void);
569 void mount_init(struct mount *mp);
571 void vn_syncer_add(struct vnode *, int);
572 void vn_syncer_remove(struct vnode *);
573 void vn_syncer_thr_create(struct mount *);
574 void vn_syncer_thr_stop(struct mount *);
576 extern struct vop_ops default_vnode_vops;
577 extern struct vop_ops dead_vnode_vops;
579 extern struct vop_ops *default_vnode_vops_p;
580 extern struct vop_ops *dead_vnode_vops_p;
584 #endif /* _KERNEL || _KERNEL_STRUCTURES */
585 #endif /* !_SYS_VNODE_H_ */