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
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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 1.25 2004/10/12 19:20:48 dillon Exp $
41 #include <sys/queue.h>
43 #include <sys/select.h>
46 #include <sys/namecache.h>
47 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
48 #include <sys/thread.h>
50 #include <sys/vfsops.h>
51 #include <sys/vfscache.h>
53 #include <machine/lock.h>
56 * The vnode is the focus of all file activity in UNIX. There is a
57 * unique vnode allocated for each active file, each current directory,
58 * each mounted-on file, text file, and the root.
62 * Each underlying filesystem allocates its own private area and hangs
63 * it from v_data. If non-null, this area is freed in getnewvnode().
65 TAILQ_HEAD(buflists, buf);
69 * Reading or writing any of these items requires holding the appropriate lock.
70 * v_freelist is locked by the global vnode_free_list token.
71 * v_mntvnodes is locked by the global mntvnodes token.
72 * v_flag, v_usecount, v_holdcount and v_writecount are
73 * locked by the v_interlock token.
74 * v_pollinfo is locked by the lock contained inside it.
76 * NOTE: XXX v_opencount currently only used by specfs. It should be used
79 * NOTE: The v_vnlock pointer is now an embedded lock structure, v_lock.
80 * v_lock is currently locked exclusively for writes but when a
81 * range lock is added later on it will be locked shared for writes
82 * and a range will be exclusively reserved in the rangelock space.
83 * v_lock is currently locked exclusively for directory modifying
84 * operations but when we start locking namespaces it will no longer
85 * be used for that function, only for the actual I/O on the directory.
88 u_long v_flag; /* vnode flags (see below) */
89 int v_usecount; /* reference count of users */
90 int v_writecount; /* reference count of writers */
91 int v_holdcnt; /* page & buffer references */
92 int v_opencount; /* number of explicit opens */
93 u_long v_id; /* capability identifier */
94 struct mount *v_mount; /* ptr to vfs we are in */
95 struct vop_ops *v_ops; /* mount, vops, other things */
96 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */
97 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */
98 struct buflists v_cleanblkhd; /* clean blocklist head */
99 struct buflists v_dirtyblkhd; /* dirty blocklist head */
100 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */
101 long v_numoutput; /* num of writes in progress */
102 enum vtype v_type; /* vnode type */
104 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
105 struct socket *vu_socket; /* unix ipc (VSOCK) */
107 udev_t vu_udev; /* device number for attach */
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 lock v_lock; /* file/dir ops lock */
120 enum vtagtype v_tag; /* type of underlying data */
121 void *v_data; /* private data for fs */
122 struct namecache_list v_namecache; /* associated nc entries */
124 struct lwkt_token vpi_token; /* lock to protect below */
125 struct selinfo vpi_selinfo; /* identity of poller(s) */
126 short vpi_events; /* what they are looking for */
127 short vpi_revents; /* what has happened */
129 struct vmresident *v_resident; /* optional vmresident */
131 const char *filename; /* Source file doing locking */
132 int line; /* Line number doing locking */
136 #define v_mountedhere v_un.vu_mountedhere
137 #define v_socket v_un.vu_socket
138 #define v_udev v_un.vu_spec.vu_udev
139 #define v_rdev v_un.vu_spec.vu_specinfo
140 #define v_specnext v_un.vu_spec.vu_specnext
141 #define v_fifoinfo v_un.vu_fifoinfo
143 #define VN_POLLEVENT(vp, events) \
145 if ((vp)->v_pollinfo.vpi_events & (events)) \
146 vn_pollevent((vp), (events)); \
152 #define VROOT 0x00001 /* root of its file system */
153 #define VTEXT 0x00002 /* vnode is a pure text prototype */
154 #define VSYSTEM 0x00004 /* vnode being used by kernel */
155 #define VISTTY 0x00008 /* vnode represents a tty */
156 #define VCTTYISOPEN 0x00010 /* controlling terminal tty is open */
157 /* open for business 0x00020 */
158 /* open for business 0x00040 */
159 /* open for business 0x00080 */
160 /* open for business 0x00100 */
161 /* open for business 0x00200 */
162 #define VBWAIT 0x00400 /* waiting for output to complete */
163 /* open for business 0x00800 */
164 /* open for business 0x01000 */
165 #define VOBJBUF 0x02000 /* Allocate buffers in VM object */
166 #define VINACTIVE 0x04000 /* The vnode is inactive */
167 #define VAGE 0x08000 /* Insert vnode at head of free list */
168 #define VOLOCK 0x10000 /* vnode is locked waiting for an object */
169 #define VOWANT 0x20000 /* a process is waiting for VOLOCK */
170 #define VRECLAIMED 0x40000 /* This vnode has been destroyed */
171 #define VFREE 0x80000 /* This vnode is on the freelist */
172 /* open for business 0x100000 */
173 #define VONWORKLST 0x200000 /* On syncer work-list */
174 #define VMOUNT 0x400000 /* Mount in progress */
175 #define VOBJDIRTY 0x800000 /* object might be dirty */
176 #define VPLACEMARKER 0x1000000 /* dummy vnode placemarker */
179 * vmntvnodescan() flags
184 #define VMSC_NOWAIT 0x10
187 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
188 * help with write clustering)
190 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
191 #define IO_APPEND 0x0002 /* append write to end */
192 #define IO_SYNC 0x0004 /* do I/O synchronously */
193 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
194 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
195 #define IO_VMIO 0x0020 /* data already in VMIO space */
196 #define IO_INVAL 0x0040 /* invalidate after I/O */
197 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
198 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
199 #define IO_NOWDRAIN 0x0200 /* do not block on wdrain */
200 #define IO_CORE 0x0400 /* I/O is part of core dump */
202 #define IO_SEQMAX 0x7F /* seq heuristic max value */
203 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
206 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID,
207 * and SVTX flag bits.
209 * VCREATE, VDELETE, and VEXCL may only be used in naccess() calls.
211 #define VDELETE 040000 /* delete if the file/dir exists */
212 #define VCREATE 020000 /* create if the file/dir does not exist */
213 #define VEXCL 010000 /* error if the file/dir already exists */
215 #define VSUID 04000 /* set user id on execution */
216 #define VSGID 02000 /* set group id on execution */
217 #define VSVTX 01000 /* save swapped text even after use */
218 #define VREAD 00400 /* read, write, execute permissions */
223 * Token indicating no attribute value yet assigned.
228 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
230 #define VLKTIMEOUT (hz / 20 + 1)
235 * Convert between vnode types and inode formats (since POSIX.1
236 * defines mode word of stat structure in terms of inode formats).
238 extern enum vtype iftovt_tab[];
239 extern int vttoif_tab[];
240 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
241 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
242 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
245 * Flags to various vnode functions.
247 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
248 #define FORCECLOSE 0x0002 /* vflush: force file closure */
249 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
250 #define DOCLOSE 0x0008 /* vclean: close active files */
251 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
252 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
255 #define VATTR_NULL(vap) vattr_null(vap)
257 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
258 #endif /* DIAGNOSTIC */
260 #define NULLVP ((struct vnode *)NULL)
262 #define VNODEOP_SET(f) \
263 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops_sysinit, &f); \
264 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_rm_vnodeops_sysinit, &f);
269 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
270 extern struct namecache *rootncp; /* root (i.e. "/") namecache */
271 extern int desiredvnodes; /* number of vnodes desired */
272 extern time_t syncdelay; /* max time to delay syncing data */
273 extern time_t filedelay; /* time to delay syncing files */
274 extern time_t dirdelay; /* time to delay syncing directories */
275 extern time_t metadelay; /* time to delay syncing metadata */
276 extern struct vm_zone *namei_zone;
277 extern int prtactive; /* nonzero to call vprint() */
278 extern struct vattr va_null; /* predefined null vattr structure */
279 extern int vfs_ioopt;
280 extern int numvnodes;
281 extern int freevnodes;
284 * Macro/function to check for client cache inconsistency w.r.t. leasing.
286 #define LEASE_READ 0x1 /* Check lease for readers */
287 #define LEASE_WRITE 0x2 /* Check lease for modifiers */
290 extern void (*lease_updatetime) (int deltat);
295 * Mods for extensibility.
299 * Flags for vdesc_flags:
301 #define VDESC_MAX_VPS 8
302 /* Low order 8 flag bits are reserved for willrele flags for vp arguments. */
303 #define VDESC_VP0_WILLRELE 0x00000001
304 #define VDESC_VP1_WILLRELE 0x00000002
305 #define VDESC_VP2_WILLRELE 0x00000004
306 #define VDESC_VP3_WILLRELE 0x00000008
307 #define VDESC_VP4_WILLRELE 0x00000010
308 #define VDESC_VP5_WILLRELE 0x00000020
309 #define VDESC_VP6_WILLRELE 0x00000040
310 #define VDESC_VP7_WILLRELE 0x00000080
311 #define VDESC_NOMAP_VPP 0x00000100
312 #define VDESC_VPP_WILLRELE 0x00000200
313 #define VDESC_VP0_WILLUNLOCK 0x00010000
314 #define VDESC_VP1_WILLUNLOCK 0x00020000
315 #define VDESC_VP2_WILLUNLOCK 0x00040000
316 #define VDESC_VP3_WILLUNLOCK 0x00080000
317 #define VDESC_VP4_WILLUNLOCK 0x00100000
318 #define VDESC_VP5_WILLUNLOCK 0x00200000
319 #define VDESC_VP6_WILLUNLOCK 0x00400000
320 #define VDESC_VP7_WILLUNLOCK 0x00800000
323 * VDESC_NO_OFFSET is used to identify the end of the offset list
324 * and in places where no such field exists.
326 #define VDESC_NO_OFFSET -1
329 * This structure describes the vnode operation taking place.
331 struct vnodeop_desc {
332 int vdesc_offset; /* offset in vector--first for speed */
333 char *vdesc_name; /* a readable name for debugging */
334 int vdesc_flags; /* VDESC_* flags */
337 * These ops are used by bypass routines to map and locate arguments.
338 * Creds and procs are not needed in bypass routines, but sometimes
339 * they are useful to (for example) transport layers.
340 * Nameidata is useful because it has a cred in it.
342 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
343 int vdesc_vpp_offset; /* return vpp location */
344 int vdesc_cred_offset; /* cred location, if any */
345 int vdesc_proc_offset; /* proc location, if any */
346 int vdesc_componentname_offset; /* if any */
351 * A list of all the operation descs.
353 extern struct vnodeop_desc *vnodeop_descs[];
356 * Interlock for scanning list of vnodes attached to a mountpoint
358 extern struct lwkt_token mntvnode_token;
361 * This macro is very helpful in defining those offsets in the vdesc struct.
363 * This is stolen from X11R4. I ignored all the fancy stuff for
364 * Crays, so if you decide to port this to such a serious machine,
365 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
367 #define VOPARG_OFFSET(p_type,field) \
368 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
369 #define VOPARG_OFFSETOF(s_type,field) \
370 VOPARG_OFFSET(s_type*,field)
371 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
372 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
376 * This structure is used to configure the new vnodeops vector. The entry
377 * descriptor describes a patricular VOP function while the operations
378 * vector descriptor recursively describes arrays of entry descriptors.
380 struct vnodeopv_entry_desc {
381 struct vnodeop_desc *opve_op;
382 int (*opve_func)(struct vop_generic_args *ap);
385 struct vnodeopv_desc {
386 struct vop_ops **opv_desc_vector; /* vect to allocate/fill*/
387 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */
390 struct vnodeopv_node {
391 TAILQ_ENTRY(vnodeopv_node) entry;
392 struct vop_ops *ops; /* allocated vector */
393 struct vnodeopv_entry_desc *descs; /* null terminated list */
396 #ifdef DEBUG_VFS_LOCKS
398 * Macros to aid in tracing VFS locking problems. Not totally
399 * reliable since if the process sleeps between changing the lock
400 * state and checking it with the assert, some other process could
401 * change the state. They are good enough for debugging a single
402 * filesystem using a single-threaded test. I find that 'cvs co src'
403 * is a pretty good test.
407 * [dfr] Kludge until I get around to fixing all the vfs locking.
409 #define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \
410 || (vp)->v_tag == VT_MFS \
411 || (vp)->v_tag == VT_NFS \
412 || (vp)->v_tag == VT_LFS \
413 || (vp)->v_tag == VT_ISOFS \
414 || (vp)->v_tag == VT_MSDOSFS)
416 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked(vp, str)
417 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked(vp, str);
419 #define ASSERT_VOP_ELOCKED(vp, str) \
421 struct vnode *_vp = (vp); \
423 if (_vp && IS_LOCKING_VFS(_vp) && \
424 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \
425 panic("%s: %p is not exclusive locked but should be", \
429 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) \
431 struct vnode *_vp = (vp); \
433 if (_vp && IS_LOCKING_VFS(_vp) && \
434 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \
435 panic("%s: %p is not exclusive locked by another proc", \
439 #define ASSERT_VOP_SLOCKED(vp, str) \
441 struct vnode *_vp = (vp); \
443 if (_vp && IS_LOCKING_VFS(_vp) && \
444 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \
445 panic("%s: %p is not locked shared but should be", \
449 void assert_vop_locked(struct vnode *vp, const char *str);
450 void assert_vop_unlocked(struct vnode *vp, const char *str);
454 #define ASSERT_VOP_LOCKED(vp, str)
455 #define ASSERT_VOP_UNLOCKED(vp, str)
457 #endif /* DEBUG_VFS_LOCKS */
460 * VOCALL calls an op given an ops vector. We break it out because BSD's
461 * vclean changes the ops vector and then wants to call ops with the old
465 typedef int (*vocall_func_t)(struct vop_generic_args *);
468 * This call executes the vops vector for the offset stored in the ap's
469 * descriptor of the passed vops rather then the one related to the
470 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of
471 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
474 #define VOCALL(vops, ap) \
475 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->vdesc_offset)))(ap)
477 #define VDESC(OP) (& __CONCAT(OP,_desc))
478 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
481 * VMIO support inline
484 extern int vmiodirenable;
487 vn_canvmio(struct vnode *vp)
489 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
495 * Public vnode manipulation functions.
509 struct vop_bwrite_args;
511 extern int (*lease_check_hook) (struct vop_lease_args *);
513 void addaliasu (struct vnode *vp, udev_t nvp_udev);
514 int v_associate_rdev(struct vnode *vp, dev_t dev);
515 void v_release_rdev(struct vnode *vp);
516 int bdevvp (dev_t dev, struct vnode **vpp);
517 void cvtstat (struct stat *st, struct ostat *ost);
518 void cvtnstat (struct stat *sb, struct nstat *nsb);
519 struct vnode *allocvnode(int lktimeout, int lkflags);
520 struct vnode *allocvnode_placemarker(void);
521 void freevnode_placemarker(struct vnode *);
522 int getnewvnode (enum vtagtype tag, struct mount *mp, struct vop_ops *ops,
523 struct vnode **vpp, int timo, int lkflags);
524 int lease_check (struct vop_lease_args *ap);
525 int spec_vnoperate (struct vop_generic_args *);
526 int speedup_syncer (void);
527 void vattr_null (struct vattr *vap);
528 int vcount (struct vnode *vp);
529 int vfinddev (dev_t dev, enum vtype type, struct vnode **vpp);
530 void vfs_add_vnodeops_sysinit (const void *);
531 void vfs_rm_vnodeops_sysinit (const void *);
532 void vfs_add_vnodeops(struct vop_ops **, struct vnodeopv_entry_desc *);
533 void vfs_rm_vnodeops(struct vop_ops **);
534 int vflush (struct mount *mp, int rootrefs, int flags);
535 int vmntvnodescan(struct mount *mp, int flags,
536 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
537 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
539 void insmntque(struct vnode *vp, struct mount *mp);
541 void vclean (struct vnode *vp, int flags, struct thread *td);
542 void vgone (struct vnode *vp);
543 int vinvalbuf (struct vnode *vp, int save,
544 struct thread *td, int slpflag, int slptimeo);
545 int vtruncbuf (struct vnode *vp, struct thread *td,
546 off_t length, int blksize);
547 void vprint (char *label, struct vnode *vp);
548 int vrecycle (struct vnode *vp, struct thread *td);
549 int vn_close (struct vnode *vp, int flags, struct thread *td);
550 int vn_isdisk (struct vnode *vp, int *errp);
551 int vn_lock (struct vnode *vp, int flags, struct thread *td);
553 int debug_vn_lock (struct vnode *vp, int flags, struct thread *td,
554 const char *filename, int line);
555 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
558 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf);
559 int vn_open (struct nameidata *ndp, int fmode, int cmode);
560 void vn_pollevent (struct vnode *vp, int events);
561 void vn_pollgone (struct vnode *vp);
562 int vn_pollrecord (struct vnode *vp, struct thread *td, int events);
563 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
564 int len, off_t offset, enum uio_seg segflg, int ioflg,
565 struct ucred *cred, int *aresid, struct thread *td);
566 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
567 int len, off_t offset, enum uio_seg segflg, int ioflg,
568 struct ucred *cred, int *aresid, struct thread *td);
569 int vn_stat (struct vnode *vp, struct stat *sb, struct thread *td);
570 dev_t vn_todev (struct vnode *vp);
571 int vfs_object_create (struct vnode *vp, struct thread *td);
572 void vfs_timestamp (struct timespec *);
573 int vn_writechk (struct vnode *vp);
574 int vop_stdbwrite (struct vop_bwrite_args *ap);
575 int vop_stdislocked (struct vop_islocked_args *ap);
576 int vop_stdlock (struct vop_lock_args *ap);
577 int vop_stdrlock (struct vop_lock_args *ap);
578 int vop_stdunlock (struct vop_unlock_args *ap);
579 int vop_noresolve(struct vop_resolve_args *ap);
580 int vop_nopoll (struct vop_poll_args *ap);
581 int vop_stdpathconf (struct vop_pathconf_args *ap);
582 int vop_stdpoll (struct vop_poll_args *ap);
583 int vop_stdrevoke (struct vop_revoke_args *ap);
584 int vop_eopnotsupp (struct vop_generic_args *ap);
585 int vop_ebadf (struct vop_generic_args *ap);
586 int vop_einval (struct vop_generic_args *ap);
587 int vop_enotty (struct vop_generic_args *ap);
588 int vop_defaultop (struct vop_generic_args *ap);
589 int vop_null (struct vop_generic_args *ap);
590 int vop_panic (struct vop_generic_args *ap);
591 int vop_stdcreatevobject (struct vop_createvobject_args *ap);
592 int vop_stddestroyvobject (struct vop_destroyvobject_args *ap);
593 int vop_stdgetvobject (struct vop_getvobject_args *ap);
595 int vx_lock (struct vnode *vp);
596 void vx_unlock (struct vnode *vp);
597 int vx_get (struct vnode *vp);
598 int vx_get_nonblock (struct vnode *vp);
599 void vx_put (struct vnode *vp);
600 int vget (struct vnode *vp, int lockflag, struct thread *td);
601 void vput (struct vnode *vp);
602 void vhold (struct vnode *);
603 void vdrop (struct vnode *);
604 void vref (struct vnode *vp);
605 void vrele (struct vnode *vp);
606 void vsetflags (struct vnode *vp, int flags);
607 void vclrflags (struct vnode *vp, int flags);
609 void vfs_subr_init(void);
610 void vfs_mount_init(void);
611 void vfs_lock_init(void);
612 void vfs_sync_init(void);
614 void vn_syncer_add_to_worklist(struct vnode *, int);
615 void vnlru_proc_wait(void);
618 extern struct vop_ops *default_vnode_vops;
619 extern struct vop_ops *spec_vnode_vops;
620 extern struct vop_ops *dead_vnode_vops;
624 #endif /* !_SYS_VNODE_H_ */