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 1.83 2008/09/17 21:44:19 dillon Exp $
41 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
44 #include <sys/queue.h>
50 #include <sys/event.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 * Struct for mount options to printable formats.
104 struct mountctl_opt {
110 * Range locks protect offset ranges in files and directories at a high
111 * level, allowing the actual I/O to be broken down into smaller pieces.
112 * Range locks will eventually be integrated into the clustered cache
113 * coherency infrastructure.
115 * We use a simple data structure for now, but eventually this should
116 * probably be a btree or red-black tree.
120 TAILQ_HEAD(vrangelock_list, vrangelock);
123 struct vrangelock_list vh_list;
127 TAILQ_ENTRY(vrangelock) vr_node;
133 #define RNGL_WAITING 0x0001 /* waiting for lock, else has lock */
134 #define RNGL_CHECK 0x0002 /* check for work on unlock */
135 #define RNGL_SHARED 0x0004 /* shared lock, else exclusive */
136 #define RNGL_ONLIST 0x0008 /* sanity check */
140 vrange_init(struct vrangelock *vr, int flags, off_t offset, off_t length)
142 vr->vr_flags = flags;
143 vr->vr_offset = offset;
144 vr->vr_length = length;
149 void vrange_lock(struct vnode *vp, struct vrangelock *vr);
150 void vrange_unlock(struct vnode *vp, struct vrangelock *vr);
154 vrange_lock_shared(struct vnode *vp, struct vrangelock *vr,
155 off_t offset, off_t length)
157 vrange_init(vr, RNGL_SHARED, offset, length);
163 vrange_lock_excl(struct vnode *vp, struct vrangelock *vr,
164 off_t offset, off_t length)
166 vrange_init(vr, 0, offset, length);
173 * The vnode infrastructure is being reorgranized. Most reference-related
174 * fields are locked by the BGL, and most file I/O related operations and
175 * vnode teardown functions are locked by the vnode lock.
177 * File read operations require a shared lock, file write operations require
178 * an exclusive lock. Most directory operations (read or write) currently
179 * require an exclusive lock due to the side effects stored in the directory
180 * inode (which we intend to fix).
182 * File reads and writes are further protected by a range lock. The intention
183 * is to be able to break I/O operations down into more easily managed pieces
184 * so vm_page arrays can be passed through rather then UIOs. This work will
185 * occur in multiple stages. The range locks will also eventually be used to
186 * deal with clustered cache coherency issues and, more immediately, to
187 * protect operations associated with the kernel-managed journaling module.
189 * NOTE: Certain fields within the vnode structure requires v_token to be
190 * held. The vnode's normal lock need not be held when accessing
191 * these fields as long as the vnode is deterministically referenced
192 * (i.e. can't be ripped out from under the caller). This is typical
193 * for code paths based on descriptors or file pointers, but not for
194 * backdoor code paths that come in via the buffer cache.
201 * NOTE: The vnode operations vector, v_ops, is a double-indirect that
202 * typically points to &v_mount->mnt_vn_use_ops. We use a double
203 * pointer because mnt_vn_use_ops may change dynamically when e.g.
204 * journaling is turned on or off.
206 * NOTE: v_filesize is currently only applicable when a VM object is
207 * associated with the vnode. Otherwise it will be set to NOOFFSET.
209 * NOTE: The following fields require a spin or token lock. Note that
210 * additional subsystems may use v_token or v_spinlock for other
211 * purposes, e.g. vfs/fifofs/fifo_vnops.c
213 * v_namecache v_spinlock
216 RB_HEAD(buf_rb_tree, buf);
217 RB_HEAD(buf_rb_hash, buf);
220 int v_flag; /* vnode flags (see below) */
222 int v_opencount; /* number of explicit opens */
223 int v_auxrefs; /* auxiliary references */
224 struct sysref v_sysref; /* normal references */
225 struct bio_track v_track_read; /* track I/O's in progress */
226 struct bio_track v_track_write; /* track I/O's in progress */
227 struct mount *v_mount; /* ptr to vfs we are in */
228 struct vop_ops **v_ops; /* vnode operations vector */
229 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist/cachelist */
230 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */
231 struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */
232 struct buf_rb_tree v_rbdirty_tree; /* RB tree of dirty bufs */
233 struct buf_rb_hash v_rbhash_tree; /* RB tree general lookup */
234 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */
235 enum vtype v_type; /* vnode type */
237 struct socket *vu_socket; /* unix ipc (VSOCK) */
239 int vu_umajor; /* device number for attach */
241 struct cdev *vu_cdevinfo; /* device (VCHR, VBLK) */
242 SLIST_ENTRY(vnode) vu_cdevnext;
244 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
246 off_t v_filesize; /* file EOF or NOOFFSET */
247 off_t v_lazyw; /* lazy write iterator */
248 off_t v_lastw; /* last write (write cluster) */
249 off_t v_cstart; /* start block of cluster */
250 off_t v_lasta; /* last allocation */
251 int v_clen; /* length of current cluster */
252 struct vm_object *v_object; /* Place to store VM object */
253 struct lock v_lock; /* file/dir ops lock */
254 struct lwkt_token v_token; /* (see above) */
255 enum vtagtype v_tag; /* type of underlying data */
256 void *v_data; /* private data for fs */
257 struct namecache_list v_namecache; /* (S) associated nc entries */
259 struct kqinfo vpi_kqinfo; /* identity of poller(s) */
261 struct vmresident *v_resident; /* optional vmresident */
262 struct vrangehead v_range; /* range lock */
263 struct ccms_dataspace v_ccms; /* cache coherency */
265 const char *filename; /* Source file doing locking */
266 int line; /* Line number doing locking */
270 #define v_socket v_un.vu_socket
271 #define v_umajor v_un.vu_cdev.vu_umajor
272 #define v_uminor v_un.vu_cdev.vu_uminor
273 #define v_rdev v_un.vu_cdev.vu_cdevinfo
274 #define v_cdevnext v_un.vu_cdev.vu_cdevnext
275 #define v_fifoinfo v_un.vu_fifoinfo
276 #define v_spinlock v_lock.lk_spinlock
281 #define VROOT 0x00000001 /* root of its file system */
282 #define VTEXT 0x00000002 /* vnode is a pure text prototype */
283 #define VSYSTEM 0x00000004 /* vnode being used by kernel */
284 #define VISTTY 0x00000008 /* vnode represents a tty */
285 #define VCTTYISOPEN 0x00000010 /* controlling terminal tty is open */
286 #define VCKPT 0x00000020 /* checkpoint-restored vnode */
287 /* open for business 0x00000040 */
288 #define VMAYHAVELOCKS 0x00000080 /* maybe posix or flock locks on vp */
289 #define VPFSROOT 0x00000100 /* may be a pseudo filesystem root */
290 /* open for business 0x00000200 */
291 #define VAGE0 0x00000400 /* Age count for recycling - 2 bits */
292 #define VAGE1 0x00000800 /* Age count for recycling - 2 bits */
293 #define VCACHED 0x00001000 /* No active references but has cache value */
294 #define VOBJBUF 0x00002000 /* Allocate buffers in VM object */
295 #define VINACTIVE 0x00004000 /* The vnode is inactive (did VOP_INACTIVE) */
296 /* open for business 0x00008000 */
297 #define VOLOCK 0x00010000 /* vnode is locked waiting for an object */
298 #define VOWANT 0x00020000 /* a process is waiting for VOLOCK */
299 #define VRECLAIMED 0x00040000 /* This vnode has been destroyed */
300 #define VFREE 0x00080000 /* This vnode is on the freelist */
301 #define VNOTSEEKABLE 0x00100000 /* rd/wr ignores file offset */
302 #define VONWORKLST 0x00200000 /* On syncer work-list */
303 #define VMOUNT 0x00400000 /* Mount in progress */
304 #define VOBJDIRTY 0x00800000 /* object might be dirty */
305 #define VSWAPCACHE 0x01000000 /* enable swapcache */
306 /* open for business 0x02000000 */
307 /* open for business 0x04000000 */
310 * vmntvnodescan() flags
312 #define VMSC_GETVP 0x01
313 #define VMSC_GETVX 0x02
314 #define VMSC_NOWAIT 0x10
315 #define VMSC_ONEPASS 0x20
318 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
319 * help with write clustering)
321 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
322 #define IO_APPEND 0x0002 /* append write to end */
323 #define IO_SYNC 0x0004 /* do I/O synchronously */
324 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
325 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
326 #define IO_VMIO 0x0020 /* data already in VMIO space */
327 #define IO_INVAL 0x0040 /* invalidate after I/O */
328 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
329 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
330 #define IO_RECURSE 0x0200 /* possibly device-recursive (vn) */
331 #define IO_CORE 0x0400 /* I/O is part of core dump */
333 #define IO_SEQMAX 0x7F /* seq heuristic max value */
334 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
337 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID,
338 * and SVTX flag bits.
340 #define VSUID 04000 /* set user id on execution */
341 #define VSGID 02000 /* set group id on execution */
342 #define VSVTX 01000 /* save swapped text even after use */
343 #define VREAD 00400 /* read, write, execute permissions */
348 * Token indicating no attribute value yet assigned.
353 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
355 #define VLKTIMEOUT (hz / 20 + 1)
360 * Convert between vnode types and inode formats (since POSIX.1
361 * defines mode word of stat structure in terms of inode formats).
363 extern enum vtype iftovt_tab[];
364 extern int vttoif_tab[];
365 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
366 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
367 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
370 * Flags to various vnode functions.
372 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
373 #define FORCECLOSE 0x0002 /* vflush: force file closure */
374 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
375 #define DOCLOSE 0x0008 /* vclean: close active files */
376 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
379 #define VATTR_NULL(vap) vattr_null(vap)
381 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
382 #endif /* DIAGNOSTIC */
384 #define NULLVP ((struct vnode *)NULL)
386 #define VNODEOP_SET(f) \
387 SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \
388 SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f);
395 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
396 extern struct nchandle rootnch; /* root (i.e. "/") namecache */
397 extern int desiredvnodes; /* number of vnodes desired */
398 extern time_t syncdelay; /* max time to delay syncing data */
399 extern time_t filedelay; /* time to delay syncing files */
400 extern time_t dirdelay; /* time to delay syncing directories */
401 extern time_t metadelay; /* time to delay syncing metadata */
402 extern struct objcache *namei_oc;
403 extern int prtactive; /* nonzero to call vprint() */
404 extern struct vattr va_null; /* predefined null vattr structure */
405 extern int vfs_ioopt;
406 extern int numvnodes;
407 extern int freevnodes;
410 * Interlock for scanning list of vnodes attached to a mountpoint
412 extern struct lwkt_token mntvnode_token;
415 * This macro is very helpful in defining those offsets in the vdesc struct.
417 * This is stolen from X11R4. I ignored all the fancy stuff for
418 * Crays, so if you decide to port this to such a serious machine,
419 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
421 #define VOPARG_OFFSET(p_type,field) \
422 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
423 #define VOPARG_OFFSETOF(s_type,field) \
424 VOPARG_OFFSET(s_type*,field)
425 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
426 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
428 typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
431 * VOCALL calls an op given an ops vector. We break it out because BSD's
432 * vclean changes the ops vector and then wants to call ops with the old
436 typedef int (*vocall_func_t)(struct vop_generic_args *);
439 * This call executes the vops vector for the offset stored in the ap's
440 * descriptor of the passed vops rather then the one related to the
441 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of
442 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
445 #define VOCALL(vops, ap) \
446 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap)
448 #define VDESC(OP) (& __CONCAT(OP,_desc))
451 * Public vnode manipulation functions.
464 struct vnode *getsynthvnode(const char *devname);
465 void addaliasu (struct vnode *vp, int x, int y);
466 int v_associate_rdev(struct vnode *vp, cdev_t dev);
467 void v_release_rdev(struct vnode *vp);
468 int bdevvp (cdev_t dev, struct vnode **vpp);
469 struct vnode *allocvnode(int lktimeout, int lkflags);
470 int freesomevnodes(int count);
471 int getnewvnode (enum vtagtype tag, struct mount *mp,
472 struct vnode **vpp, int timo, int lkflags);
473 int getspecialvnode (enum vtagtype tag, struct mount *mp,
474 struct vop_ops **ops, struct vnode **vpp, int timo,
476 int speedup_syncer (void);
477 int vaccess(enum vtype, mode_t, uid_t, gid_t, mode_t, struct ucred *);
478 void vattr_null (struct vattr *vap);
479 int vcount (struct vnode *vp);
480 int vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp);
481 void vfs_nadd_vnodeops_sysinit (void *);
482 void vfs_nrm_vnodeops_sysinit (void *);
483 void vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
484 void vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
485 int vflush (struct mount *mp, int rootrefs, int flags);
486 int vmntvnodescan(struct mount *mp, int flags,
487 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
488 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
490 void insmntque(struct vnode *vp, struct mount *mp);
492 void vclean_vxlocked (struct vnode *vp, int flags);
493 void vclean_unlocked (struct vnode *vp);
494 void vgone_vxlocked (struct vnode *vp);
495 int vrevoke (struct vnode *vp, struct ucred *cred);
496 int vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo);
497 int vtruncbuf (struct vnode *vp, off_t length, int blksize);
498 void vnode_pager_setsize (struct vnode *, vm_ooffset_t);
499 int nvtruncbuf (struct vnode *vp, off_t length, int blksize, int boff);
500 int nvextendbuf(struct vnode *vp, off_t olength, off_t nlength,
501 int oblksize, int nblksize,
502 int oboff, int nboff, int trivial);
503 void nvnode_pager_setsize (struct vnode *vp, off_t length,
504 int blksize, int boff);
505 int vfsync(struct vnode *vp, int waitfor, int passes,
506 int (*checkdef)(struct buf *),
507 int (*waitoutput)(struct vnode *, struct thread *));
508 int vinitvmio(struct vnode *vp, off_t filesize, int blksize, int boff);
509 void vprint (char *label, struct vnode *vp);
510 int vrecycle (struct vnode *vp);
511 int vmaxiosize (struct vnode *vp);
512 void vn_strategy(struct vnode *vp, struct bio *bio);
513 int vn_cache_strategy(struct vnode *vp, struct bio *bio);
514 int vn_close (struct vnode *vp, int flags);
515 void vn_gone (struct vnode *vp);
516 int vn_isdisk (struct vnode *vp, int *errp);
517 int vn_lock (struct vnode *vp, int flags);
518 int vn_islocked (struct vnode *vp);
519 int vn_islocked_unlock (struct vnode *vp);
520 void vn_islocked_relock (struct vnode *vp, int vpls);
521 void vn_unlock (struct vnode *vp);
523 int debug_vn_lock (struct vnode *vp, int flags,
524 const char *filename, int line);
525 #define vn_lock(vp,flags) debug_vn_lock(vp, flags, __FILE__, __LINE__)
528 int vn_get_namelen(struct vnode *, int *);
529 void vn_setspecops (struct file *fp);
530 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf, int guess);
531 int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
532 int vn_opendisk (const char *devname, int fmode, struct vnode **vpp);
533 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
534 int len, off_t offset, enum uio_seg segflg, int ioflg,
535 struct ucred *cred, int *aresid);
536 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
537 int len, off_t offset, enum uio_seg segflg, int ioflg,
538 struct ucred *cred, int *aresid);
539 int vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred);
540 cdev_t vn_todev (struct vnode *vp);
541 void vfs_timestamp (struct timespec *);
542 size_t vfs_flagstostr(int flags, const struct mountctl_opt *optp, char *buf, size_t len, int *errorp);
543 void vn_mark_atime(struct vnode *vp, struct thread *td);
544 int vn_writechk (struct vnode *vp, struct nchandle *nch);
545 int ncp_writechk(struct nchandle *nch);
546 int vop_stdopen (struct vop_open_args *ap);
547 int vop_stdclose (struct vop_close_args *ap);
548 int vop_stdmountctl(struct vop_mountctl_args *ap);
549 int vop_stdgetpages(struct vop_getpages_args *ap);
550 int vop_stdputpages(struct vop_putpages_args *ap);
551 int vop_stdmarkatime(struct vop_markatime_args *ap);
552 int vop_stdnoread(struct vop_read_args *ap);
553 int vop_stdnowrite(struct vop_write_args *ap);
554 int vop_stdpathconf (struct vop_pathconf_args *ap);
555 int vop_eopnotsupp (struct vop_generic_args *ap);
556 int vop_ebadf (struct vop_generic_args *ap);
557 int vop_einval (struct vop_generic_args *ap);
558 int vop_enotty (struct vop_generic_args *ap);
559 int vop_defaultop (struct vop_generic_args *ap);
560 int vop_null (struct vop_generic_args *ap);
561 int vop_panic (struct vop_generic_args *ap);
562 int vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t,
565 int vop_compat_nresolve(struct vop_nresolve_args *ap);
566 int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
567 int vop_compat_ncreate(struct vop_ncreate_args *ap);
568 int vop_compat_nmkdir(struct vop_nmkdir_args *ap);
569 int vop_compat_nmknod(struct vop_nmknod_args *ap);
570 int vop_compat_nlink(struct vop_nlink_args *ap);
571 int vop_compat_nsymlink(struct vop_nsymlink_args *ap);
572 int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
573 int vop_compat_nremove(struct vop_nremove_args *ap);
574 int vop_compat_nrmdir(struct vop_nrmdir_args *ap);
575 int vop_compat_nrename(struct vop_nrename_args *ap);
577 void vx_lock (struct vnode *vp);
578 void vx_unlock (struct vnode *vp);
579 void vx_get (struct vnode *vp);
580 int vx_get_nonblock (struct vnode *vp);
581 void vx_put (struct vnode *vp);
582 int vget (struct vnode *vp, int lockflag);
583 void vput (struct vnode *vp);
584 void vhold (struct vnode *);
585 void vhold_interlocked (struct vnode *);
586 void vdrop (struct vnode *);
587 void vref (struct vnode *vp);
588 void vrele (struct vnode *vp);
589 void vsetflags (struct vnode *vp, int flags);
590 void vclrflags (struct vnode *vp, int flags);
592 void vfs_subr_init(void);
593 void vfs_mount_init(void);
594 void vfs_lock_init(void);
595 void vfs_sync_init(void);
596 void mount_init(struct mount *mp);
598 void vn_syncer_add(struct vnode *, int);
599 void vn_syncer_remove(struct vnode *);
600 void vnlru_proc_wait(void);
602 extern struct vop_ops default_vnode_vops;
603 extern struct vop_ops dead_vnode_vops;
605 extern struct vop_ops *default_vnode_vops_p;
606 extern struct vop_ops *dead_vnode_vops_p;
610 #endif /* _KERNEL || _KERNEL_STRUCTURES */
611 #endif /* !_SYS_VNODE_H_ */