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.
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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
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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 1.7 2003/08/20 07:31:22 rob Exp $
41 #include <sys/queue.h>
43 #include <sys/select.h>
47 #include <machine/lock.h>
50 * The vnode is the focus of all file activity in UNIX. There is a
51 * unique vnode allocated for each active file, each current directory,
52 * each mounted-on file, text file, and the root.
56 * Vnode types. VNON means no type.
58 enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD };
62 * These are for the benefit of external programs only (e.g., pstat)
63 * and should NEVER be inspected by the kernel.
66 VT_NON, VT_UFS, VT_NFS, VT_MFS, VT_PC, VT_LFS, VT_LOFS, VT_FDESC,
67 VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS,
68 VT_UNION, VT_MSDOSFS, VT_TFS, VT_VFS, VT_CODA, VT_NTFS,
69 VT_HPFS, VT_NWFS, VT_SMBFS
73 * Each underlying filesystem allocates its own private area and hangs
74 * it from v_data. If non-null, this area is freed in getnewvnode().
76 TAILQ_HEAD(buflists, buf);
78 typedef int vop_t (void *);
82 * Reading or writing any of these items requires holding the appropriate lock.
83 * v_freelist is locked by the global vnode_free_list token.
84 * v_mntvnodes is locked by the global mntvnodes token.
85 * v_flag, v_usecount, v_holdcount and v_writecount are
86 * locked by the v_interlock token.
87 * v_pollinfo is locked by the lock contained inside it.
90 u_long v_flag; /* vnode flags (see below) */
91 int v_usecount; /* reference count of users */
92 int v_writecount; /* reference count of writers */
93 int v_holdcnt; /* page & buffer references */
94 u_long v_id; /* capability identifier */
95 struct mount *v_mount; /* ptr to vfs we are in */
96 vop_t **v_op; /* vnode operations vector */
97 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */
98 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */
99 struct buflists v_cleanblkhd; /* clean blocklist head */
100 struct buflists v_dirtyblkhd; /* dirty blocklist head */
101 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */
102 long v_numoutput; /* num of writes in progress */
103 enum vtype v_type; /* vnode type */
105 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
106 struct socket *vu_socket; /* unix ipc (VSOCK) */
108 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */
109 SLIST_ENTRY(vnode) vu_specnext;
111 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
113 struct nqlease *v_lease; /* Soft reference to lease */
114 daddr_t v_lastw; /* last write (write cluster) */
115 daddr_t v_cstart; /* start block of cluster */
116 daddr_t v_lasta; /* last allocation */
117 int v_clen; /* length of current cluster */
118 struct vm_object *v_object; /* Place to store VM object */
119 struct lwkt_token v_interlock; /* lock on usecount and flag */
120 struct lock *v_vnlock; /* used for non-locking fs's */
121 enum vtagtype v_tag; /* type of underlying data */
122 void *v_data; /* private data for fs */
123 LIST_HEAD(, namecache) v_cache_src; /* Cache entries from us */
124 TAILQ_HEAD(, namecache) v_cache_dst; /* Cache entries to us */
125 struct vnode *v_dd; /* .. vnode */
126 u_long v_ddid; /* .. capability identifier */
128 struct lwkt_token vpi_token; /* lock to protect below */
129 struct selinfo vpi_selinfo; /* identity of poller(s) */
130 short vpi_events; /* what they are looking for */
131 short vpi_revents; /* what has happened */
133 struct proc *v_vxproc; /* proc owning VXLOCK */
135 const char *filename; /* Source file doing locking */
136 int line; /* Line number doing locking */
139 #define v_mountedhere v_un.vu_mountedhere
140 #define v_socket v_un.vu_socket
141 #define v_rdev v_un.vu_spec.vu_specinfo
142 #define v_specnext v_un.vu_spec.vu_specnext
143 #define v_fifoinfo v_un.vu_fifoinfo
145 #define VN_POLLEVENT(vp, events) \
147 if ((vp)->v_pollinfo.vpi_events & (events)) \
148 vn_pollevent((vp), (events)); \
154 #define VROOT 0x00001 /* root of its file system */
155 #define VTEXT 0x00002 /* vnode is a pure text prototype */
156 #define VSYSTEM 0x00004 /* vnode being used by kernel */
157 #define VISTTY 0x00008 /* vnode represents a tty */
158 #define VXLOCK 0x00100 /* vnode is locked to change underlying type */
159 #define VXWANT 0x00200 /* process is waiting for vnode */
160 #define VBWAIT 0x00400 /* waiting for output to complete */
161 /* open for business 0x00800 */
162 /* open for business 0x01000 */
163 #define VOBJBUF 0x02000 /* Allocate buffers in VM object */
164 /* open for business 0x04000 */
165 #define VAGE 0x08000 /* Insert vnode at head of free list */
166 #define VOLOCK 0x10000 /* vnode is locked waiting for an object */
167 #define VOWANT 0x20000 /* a process is waiting for VOLOCK */
168 #define VDOOMED 0x40000 /* This vnode is being recycled */
169 #define VFREE 0x80000 /* This vnode is on the freelist */
170 #define VONWORKLST 0x200000 /* On syncer work-list */
171 #define VMOUNT 0x400000 /* Mount in progress */
172 #define VOBJDIRTY 0x800000 /* object might be dirty */
175 * Vnode attributes. A field value of VNOVAL represents a field whose value
176 * is unavailable (getattr) or which is not to be changed (setattr).
179 enum vtype va_type; /* vnode type (for create) */
180 u_short va_mode; /* files access mode and type */
181 short va_nlink; /* number of references to file */
182 uid_t va_uid; /* owner user id */
183 gid_t va_gid; /* owner group id */
184 udev_t va_fsid; /* file system id */
185 long va_fileid; /* file id */
186 u_quad_t va_size; /* file size in bytes */
187 long va_blocksize; /* blocksize preferred for i/o */
188 struct timespec va_atime; /* time of last access */
189 struct timespec va_mtime; /* time of last modification */
190 struct timespec va_ctime; /* time file changed */
191 u_long va_gen; /* generation number of file */
192 u_long va_flags; /* flags defined for file */
193 udev_t va_rdev; /* device the special file represents */
194 u_quad_t va_bytes; /* bytes of disk space held by file */
195 u_quad_t va_filerev; /* file modification number */
196 u_int va_vaflags; /* operations flags, see below */
197 long va_spare; /* remain quad aligned */
201 * Flags for va_vaflags.
203 #define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
204 #define VA_EXCLUSIVE 0x02 /* exclusive create request */
207 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
208 * help with write clustering)
210 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
211 #define IO_APPEND 0x0002 /* append write to end */
212 #define IO_SYNC 0x0004 /* do I/O synchronously */
213 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
214 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
215 #define IO_VMIO 0x0020 /* data already in VMIO space */
216 #define IO_INVAL 0x0040 /* invalidate after I/O */
217 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
218 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
219 #define IO_NOWDRAIN 0x0200 /* do not block on wdrain */
220 #define IO_CORE 0x0400 /* I/O is part of core dump */
222 #define IO_SEQMAX 0x7F /* seq heuristic max value */
223 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
226 * Modes. Some values same as Ixxx entries from inode.h for now.
228 #define VSUID 04000 /* set user id on execution */
229 #define VSGID 02000 /* set group id on execution */
230 #define VSVTX 01000 /* save swapped text even after use */
231 #define VREAD 00400 /* read, write, execute permissions */
236 * Token indicating no attribute value yet assigned.
241 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
243 #define VLKTIMEOUT (hz / 20 + 1)
247 #ifdef MALLOC_DECLARE
248 MALLOC_DECLARE(M_VNODE);
252 * Convert between vnode types and inode formats (since POSIX.1
253 * defines mode word of stat structure in terms of inode formats).
255 extern enum vtype iftovt_tab[];
256 extern int vttoif_tab[];
257 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
258 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
259 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
262 * Flags to various vnode functions.
264 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
265 #define FORCECLOSE 0x0002 /* vflush: force file closure */
266 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
267 #define DOCLOSE 0x0008 /* vclean: close active files */
268 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
269 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
271 #define VREF(vp) vref(vp)
275 #define VATTR_NULL(vap) vattr_null(vap)
277 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
278 #endif /* DIAGNOSTIC */
280 #define NULLVP ((struct vnode *)NULL)
282 #define VNODEOP_SET(f) \
283 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \
284 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f);
289 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
290 extern int desiredvnodes; /* number of vnodes desired */
291 extern time_t syncdelay; /* max time to delay syncing data */
292 extern time_t filedelay; /* time to delay syncing files */
293 extern time_t dirdelay; /* time to delay syncing directories */
294 extern time_t metadelay; /* time to delay syncing metadata */
295 extern struct vm_zone *namei_zone;
296 extern int prtactive; /* nonzero to call vprint() */
297 extern struct vattr va_null; /* predefined null vattr structure */
298 extern int vfs_ioopt;
301 * Macro/function to check for client cache inconsistency w.r.t. leasing.
303 #define LEASE_READ 0x1 /* Check lease for readers */
304 #define LEASE_WRITE 0x2 /* Check lease for modifiers */
307 extern void (*lease_updatetime) (int deltat);
309 #define VSHOULDFREE(vp) \
310 (!((vp)->v_flag & (VFREE|VDOOMED)) && \
311 !(vp)->v_holdcnt && !(vp)->v_usecount && \
312 (!(vp)->v_object || \
313 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count)))
315 #define VMIGHTFREE(vp) \
316 (!((vp)->v_flag & (VFREE|VDOOMED|VXLOCK)) && \
317 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount)
319 #define VSHOULDBUSY(vp) \
320 (((vp)->v_flag & VFREE) && \
321 ((vp)->v_holdcnt || (vp)->v_usecount))
323 #define VI_LOCK(vp) lwkt_gettoken(&(vp)->v_interlock)
324 #define VI_UNLOCK(vp) lwkt_reltoken(&(vp)->v_interlock)
330 * Mods for extensibility.
334 * Flags for vdesc_flags:
336 #define VDESC_MAX_VPS 16
337 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
338 #define VDESC_VP0_WILLRELE 0x0001
339 #define VDESC_VP1_WILLRELE 0x0002
340 #define VDESC_VP2_WILLRELE 0x0004
341 #define VDESC_VP3_WILLRELE 0x0008
342 #define VDESC_NOMAP_VPP 0x0100
343 #define VDESC_VPP_WILLRELE 0x0200
346 * VDESC_NO_OFFSET is used to identify the end of the offset list
347 * and in places where no such field exists.
349 #define VDESC_NO_OFFSET -1
352 * This structure describes the vnode operation taking place.
354 struct vnodeop_desc {
355 int vdesc_offset; /* offset in vector--first for speed */
356 char *vdesc_name; /* a readable name for debugging */
357 int vdesc_flags; /* VDESC_* flags */
360 * These ops are used by bypass routines to map and locate arguments.
361 * Creds and procs are not needed in bypass routines, but sometimes
362 * they are useful to (for example) transport layers.
363 * Nameidata is useful because it has a cred in it.
365 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
366 int vdesc_vpp_offset; /* return vpp location */
367 int vdesc_cred_offset; /* cred location, if any */
368 int vdesc_proc_offset; /* proc location, if any */
369 int vdesc_componentname_offset; /* if any */
371 * Finally, we've got a list of private data (about each operation)
372 * for each transport layer. (Support to manage this list is not
375 caddr_t *vdesc_transports;
380 * A list of all the operation descs.
382 extern struct vnodeop_desc *vnodeop_descs[];
385 * Interlock for scanning list of vnodes attached to a mountpoint
387 extern struct lwkt_token mntvnode_token;
390 * This macro is very helpful in defining those offsets in the vdesc struct.
392 * This is stolen from X11R4. I ignored all the fancy stuff for
393 * Crays, so if you decide to port this to such a serious machine,
394 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
396 #define VOPARG_OFFSET(p_type,field) \
397 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
398 #define VOPARG_OFFSETOF(s_type,field) \
399 VOPARG_OFFSET(s_type*,field)
400 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
401 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
405 * This structure is used to configure the new vnodeops vector.
407 struct vnodeopv_entry_desc {
408 struct vnodeop_desc *opve_op; /* which operation this is */
409 vop_t *opve_impl; /* code implementing this operation */
411 struct vnodeopv_desc {
412 /* ptr to the ptr to the vector where op should go */
413 vop_t ***opv_desc_vector_p;
414 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */
418 * A generic structure.
419 * This can be used by bypass routines to identify generic arguments.
421 struct vop_generic_args {
422 struct vnodeop_desc *a_desc;
423 /* other random data follows, presumably */
427 #ifdef DEBUG_VFS_LOCKS
429 * Macros to aid in tracing VFS locking problems. Not totally
430 * reliable since if the process sleeps between changing the lock
431 * state and checking it with the assert, some other process could
432 * change the state. They are good enough for debugging a single
433 * filesystem using a single-threaded test. I find that 'cvs co src'
434 * is a pretty good test.
438 * [dfr] Kludge until I get around to fixing all the vfs locking.
440 #define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \
441 || (vp)->v_tag == VT_MFS \
442 || (vp)->v_tag == VT_NFS \
443 || (vp)->v_tag == VT_LFS \
444 || (vp)->v_tag == VT_ISOFS \
445 || (vp)->v_tag == VT_MSDOSFS)
447 #define ASSERT_VOP_LOCKED(vp, str) \
449 struct vnode *_vp = (vp); \
451 if (_vp && IS_LOCKING_VFS(_vp) && !VOP_ISLOCKED(_vp, NULL)) \
452 panic("%s: %p is not locked but should be", str, _vp); \
455 #define ASSERT_VOP_UNLOCKED(vp, str) \
457 struct vnode *_vp = (vp); \
460 if (_vp && IS_LOCKING_VFS(_vp)) { \
461 lockstate = VOP_ISLOCKED(_vp, curthread); \
462 if (lockstate == LK_EXCLUSIVE) \
463 panic("%s: %p is locked but should not be", \
468 #define ASSERT_VOP_ELOCKED(vp, str) \
470 struct vnode *_vp = (vp); \
472 if (_vp && IS_LOCKING_VFS(_vp) && \
473 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \
474 panic("%s: %p is not exclusive locked but should be", \
478 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) \
480 struct vnode *_vp = (vp); \
482 if (_vp && IS_LOCKING_VFS(_vp) && \
483 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \
484 panic("%s: %p is not exclusive locked by another proc", \
488 #define ASSERT_VOP_SLOCKED(vp, str) \
490 struct vnode *_vp = (vp); \
492 if (_vp && IS_LOCKING_VFS(_vp) && \
493 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \
494 panic("%s: %p is not locked shared but should be", \
500 #define ASSERT_VOP_LOCKED(vp, str)
501 #define ASSERT_VOP_UNLOCKED(vp, str)
506 * VOCALL calls an op given an ops vector. We break it out because BSD's
507 * vclean changes the ops vector and then wants to call ops with the old
510 #define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
513 * This call works for vnodes in the kernel.
515 #define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP))
516 #define VDESC(OP) (& __CONCAT(OP,_desc))
517 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
520 * VMIO support inline
523 extern int vmiodirenable;
526 vn_canvmio(struct vnode *vp)
528 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
534 * Finally, include the default set of vnode operations.
536 #include "vnode_if.h"
539 * Public vnode manipulation functions.
541 struct componentname;
554 struct vop_bwrite_args;
556 extern int (*lease_check_hook) (struct vop_lease_args *);
558 void addalias (struct vnode *vp, dev_t nvp_rdev);
559 void addaliasu (struct vnode *vp, udev_t nvp_rdev);
560 int bdevvp (dev_t dev, struct vnode **vpp);
561 /* cache_* may belong in namei.h. */
562 void cache_enter (struct vnode *dvp, struct vnode *vp,
563 struct componentname *cnp);
564 int cache_lookup (struct vnode *dvp, struct vnode **vpp,
565 struct componentname *cnp);
566 void cache_purge (struct vnode *vp);
567 void cache_purgevfs (struct mount *mp);
568 int cache_leaf_test (struct vnode *vp);
569 void cvtstat (struct stat *st, struct ostat *ost);
570 void cvtnstat (struct stat *sb, struct nstat *nsb);
571 int getnewvnode (enum vtagtype tag,
572 struct mount *mp, vop_t **vops, struct vnode **vpp);
573 int lease_check (struct vop_lease_args *ap);
574 int spec_vnoperate (struct vop_generic_args *);
575 int speedup_syncer (void);
576 int textvp_fullpath (struct proc *p, char **retbuf, char **retfreebuf);
577 void vattr_null (struct vattr *vap);
578 int vcount (struct vnode *vp);
579 void vdrop (struct vnode *);
580 int vfinddev (dev_t dev, enum vtype type, struct vnode **vpp);
581 void vfs_add_vnodeops (const void *);
582 void vfs_rm_vnodeops (const void *);
583 int vflush (struct mount *mp, int rootrefs, int flags);
584 int vget (struct vnode *vp, int lockflag, struct thread *td);
585 void vgone (struct vnode *vp);
586 void vgonel (struct vnode *vp, struct thread *td);
587 void vhold (struct vnode *);
588 int vinvalbuf (struct vnode *vp, int save,
589 struct thread *td, int slpflag, int slptimeo);
590 int vtruncbuf (struct vnode *vp, struct thread *td,
591 off_t length, int blksize);
592 void vprint (char *label, struct vnode *vp);
593 int vrecycle (struct vnode *vp, struct lwkt_token *inter_lkp,
595 int vn_close (struct vnode *vp, int flags, struct thread *td);
596 int vn_isdisk (struct vnode *vp, int *errp);
597 int vn_lock (struct vnode *vp, int flags, struct thread *td);
599 int debug_vn_lock (struct vnode *vp, int flags, struct thread *td,
600 const char *filename, int line);
601 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
603 int vn_open (struct nameidata *ndp, int fmode, int cmode);
604 void vn_pollevent (struct vnode *vp, int events);
605 void vn_pollgone (struct vnode *vp);
606 int vn_pollrecord (struct vnode *vp, struct thread *td, int events);
607 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
608 int len, off_t offset, enum uio_seg segflg, int ioflg,
609 struct ucred *cred, int *aresid, struct thread *td);
610 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
611 int len, off_t offset, enum uio_seg segflg, int ioflg,
612 struct ucred *cred, int *aresid, struct thread *td);
613 int vn_stat (struct vnode *vp, struct stat *sb, struct thread *td);
614 dev_t vn_todev (struct vnode *vp);
615 int vfs_cache_lookup (struct vop_lookup_args *ap);
616 int vfs_object_create (struct vnode *vp, struct thread *td);
617 void vfs_timestamp (struct timespec *);
618 int vn_writechk (struct vnode *vp);
619 int vop_stdbwrite (struct vop_bwrite_args *ap);
620 int vop_stdislocked (struct vop_islocked_args *);
621 int vop_stdlock (struct vop_lock_args *);
622 int vop_stdunlock (struct vop_unlock_args *);
623 int vop_noislocked (struct vop_islocked_args *);
624 int vop_nolock (struct vop_lock_args *);
625 int vop_nopoll (struct vop_poll_args *);
626 int vop_nounlock (struct vop_unlock_args *);
627 int vop_stdpathconf (struct vop_pathconf_args *);
628 int vop_stdpoll (struct vop_poll_args *);
629 int vop_revoke (struct vop_revoke_args *);
630 int vop_sharedlock (struct vop_lock_args *);
631 int vop_eopnotsupp (struct vop_generic_args *ap);
632 int vop_ebadf (struct vop_generic_args *ap);
633 int vop_einval (struct vop_generic_args *ap);
634 int vop_enotty (struct vop_generic_args *ap);
635 int vop_defaultop (struct vop_generic_args *ap);
636 int vop_null (struct vop_generic_args *ap);
637 int vop_panic (struct vop_generic_args *ap);
638 int vop_stdcreatevobject (struct vop_createvobject_args *ap);
639 int vop_stddestroyvobject (struct vop_destroyvobject_args *ap);
640 int vop_stdgetvobject (struct vop_getvobject_args *ap);
642 void vfree (struct vnode *vp);
643 void vput (struct vnode *vp);
644 void vrele (struct vnode *vp);
645 void vref (struct vnode *vp);
646 void vbusy (struct vnode *vp);
648 extern vop_t **default_vnodeop_p;
649 extern vop_t **spec_vnodeop_p;
653 #endif /* !_SYS_VNODE_H_ */