proc->thread stage 3: synchronize ps, top, and libkvm, and add some convenience
[dragonfly.git] / sys / sys / vnode.h
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1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
32 *
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 $
1de703da 35 * $DragonFly: src/sys/sys/vnode.h,v 1.2 2003/06/17 04:28:59 dillon Exp $
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36 */
37
38#ifndef _SYS_VNODE_H_
39#define _SYS_VNODE_H_
40
41#include <sys/queue.h>
42#include <sys/lock.h>
43#include <sys/select.h>
44#include <sys/uio.h>
45#include <sys/acl.h>
46
47#include <machine/lock.h>
48
49/*
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.
53 */
54
55/*
56 * Vnode types. VNON means no type.
57 */
58enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD };
59
60/*
61 * Vnode tag types.
62 * These are for the benefit of external programs only (e.g., pstat)
63 * and should NEVER be inspected by the kernel.
64 */
65enum vtagtype {
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
70};
71
72/*
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().
75 */
76TAILQ_HEAD(buflists, buf);
77
78typedef int vop_t __P((void *));
79struct namecache;
80
81/*
82 * Reading or writing any of these items requires holding the appropriate lock.
83 * v_freelist is locked by the global vnode_free_list simple lock.
84 * v_mntvnodes is locked by the global mntvnodes simple lock.
85 * v_flag, v_usecount, v_holdcount and v_writecount are
86 * locked by the v_interlock simple lock.
87 * v_pollinfo is locked by the lock contained inside it.
88 */
89struct vnode {
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 */
104 union {
105 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
106 struct socket *vu_socket; /* unix ipc (VSOCK) */
107 struct {
108 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */
109 SLIST_ENTRY(vnode) vu_specnext;
110 } vu_spec;
111 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
112 } v_un;
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 simplelock 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 */
127 struct {
128 struct simplelock vpi_lock; /* 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 */
132 } v_pollinfo;
133 struct proc *v_vxproc; /* proc owning VXLOCK */
134#ifdef DEBUG_LOCKS
135 const char *filename; /* Source file doing locking */
136 int line; /* Line number doing locking */
137#endif
138};
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
144
145#define VN_POLLEVENT(vp, events) \
146 do { \
147 if ((vp)->v_pollinfo.vpi_events & (events)) \
148 vn_pollevent((vp), (events)); \
149 } while (0)
150
151/*
152 * Vnode flags.
153 */
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 */
173
174/*
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).
177 */
178struct vattr {
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 */
198};
199
200/*
201 * Flags for va_vaflags.
202 */
203#define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */
204#define VA_EXCLUSIVE 0x02 /* exclusive create request */
205
206/*
207 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
208 * help with write clustering)
209 */
210#define IO_UNIT 0x01 /* do I/O as atomic unit */
211#define IO_APPEND 0x02 /* append write to end */
212#define IO_SYNC 0x04 /* do I/O synchronously */
213#define IO_NODELOCKED 0x08 /* underlying node already locked */
214#define IO_NDELAY 0x10 /* FNDELAY flag set in file table */
215#define IO_VMIO 0x20 /* data already in VMIO space */
216#define IO_INVAL 0x40 /* invalidate after I/O */
217#define IO_ASYNC 0x80 /* bawrite rather then bdwrite */
218#define IO_DIRECT 0x100 /* attempt to bypass buffer cache */
219#define IO_NOWDRAIN 0x200 /* do not block on wdrain */
220
221#define IO_SEQMAX 0x7F /* seq heuristic max value */
222#define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
223
224/*
225 * Modes. Some values same as Ixxx entries from inode.h for now.
226 */
227#define VSUID 04000 /* set user id on execution */
228#define VSGID 02000 /* set group id on execution */
229#define VSVTX 01000 /* save swapped text even after use */
230#define VREAD 00400 /* read, write, execute permissions */
231#define VWRITE 00200
232#define VEXEC 00100
233
234/*
235 * Token indicating no attribute value yet assigned.
236 */
237#define VNOVAL (-1)
238
239/*
240 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
241 */
242#define VLKTIMEOUT (hz / 20 + 1)
243
244#ifdef _KERNEL
245
246#ifdef MALLOC_DECLARE
247MALLOC_DECLARE(M_VNODE);
248#endif
249
250/*
251 * Convert between vnode types and inode formats (since POSIX.1
252 * defines mode word of stat structure in terms of inode formats).
253 */
254extern enum vtype iftovt_tab[];
255extern int vttoif_tab[];
256#define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
257#define VTTOIF(indx) (vttoif_tab[(int)(indx)])
258#define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
259
260/*
261 * Flags to various vnode functions.
262 */
263#define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
264#define FORCECLOSE 0x0002 /* vflush: force file closure */
265#define WRITECLOSE 0x0004 /* vflush: only close writable files */
266#define DOCLOSE 0x0008 /* vclean: close active files */
267#define V_SAVE 0x0001 /* vinvalbuf: sync file first */
268#define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
269
270#define VREF(vp) vref(vp)
271
272
273#ifdef DIAGNOSTIC
274#define VATTR_NULL(vap) vattr_null(vap)
275#else
276#define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
277#endif /* DIAGNOSTIC */
278
279#define NULLVP ((struct vnode *)NULL)
280
281#define VNODEOP_SET(f) \
282 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \
283 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f);
284
285/*
286 * Global vnode data.
287 */
288extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
289extern int desiredvnodes; /* number of vnodes desired */
290extern time_t syncdelay; /* max time to delay syncing data */
291extern time_t filedelay; /* time to delay syncing files */
292extern time_t dirdelay; /* time to delay syncing directories */
293extern time_t metadelay; /* time to delay syncing metadata */
294extern struct vm_zone *namei_zone;
295extern int prtactive; /* nonzero to call vprint() */
296extern struct vattr va_null; /* predefined null vattr structure */
297extern int vfs_ioopt;
298
299/*
300 * Macro/function to check for client cache inconsistency w.r.t. leasing.
301 */
302#define LEASE_READ 0x1 /* Check lease for readers */
303#define LEASE_WRITE 0x2 /* Check lease for modifiers */
304
305
306extern void (*lease_updatetime) __P((int deltat));
307
308#define VSHOULDFREE(vp) \
309 (!((vp)->v_flag & (VFREE|VDOOMED)) && \
310 !(vp)->v_holdcnt && !(vp)->v_usecount && \
311 (!(vp)->v_object || \
312 !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count)))
313
314#define VMIGHTFREE(vp) \
315 (!((vp)->v_flag & (VFREE|VDOOMED|VXLOCK)) && \
316 LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount)
317
318#define VSHOULDBUSY(vp) \
319 (((vp)->v_flag & VFREE) && \
320 ((vp)->v_holdcnt || (vp)->v_usecount))
321
322#define VI_LOCK(vp) simple_lock(&(vp)->v_interlock)
323#define VI_TRYLOCK(vp) simple_lock_try(&(vp)->v_interlock)
324#define VI_UNLOCK(vp) simple_unlock(&(vp)->v_interlock)
325
326#endif /* _KERNEL */
327
328
329/*
330 * Mods for extensibility.
331 */
332
333/*
334 * Flags for vdesc_flags:
335 */
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
344
345/*
346 * VDESC_NO_OFFSET is used to identify the end of the offset list
347 * and in places where no such field exists.
348 */
349#define VDESC_NO_OFFSET -1
350
351/*
352 * This structure describes the vnode operation taking place.
353 */
354struct 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 */
358
359 /*
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.
364 */
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 */
370 /*
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
373 * yet part of BSD.)
374 */
375 caddr_t *vdesc_transports;
376};
377
378#ifdef _KERNEL
379/*
380 * A list of all the operation descs.
381 */
382extern struct vnodeop_desc *vnodeop_descs[];
383
384/*
385 * Interlock for scanning list of vnodes attached to a mountpoint
386 */
387extern struct simplelock mntvnode_slock;
388
389/*
390 * This macro is very helpful in defining those offsets in the vdesc struct.
391 *
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}.
395 */
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)))
402
403
404/*
405 * This structure is used to configure the new vnodeops vector.
406 */
407struct vnodeopv_entry_desc {
408 struct vnodeop_desc *opve_op; /* which operation this is */
409 vop_t *opve_impl; /* code implementing this operation */
410};
411struct 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 */
415};
416
417/*
418 * A generic structure.
419 * This can be used by bypass routines to identify generic arguments.
420 */
421struct vop_generic_args {
422 struct vnodeop_desc *a_desc;
423 /* other random data follows, presumably */
424};
425
426
427#ifdef DEBUG_VFS_LOCKS
428/*
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.
435 */
436
437/*
438 * [dfr] Kludge until I get around to fixing all the vfs locking.
439 */
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)
446
447#define ASSERT_VOP_LOCKED(vp, str) \
448do { \
449 struct vnode *_vp = (vp); \
450 \
451 if (_vp && IS_LOCKING_VFS(_vp) && !VOP_ISLOCKED(_vp, NULL)) \
452 panic("%s: %p is not locked but should be", str, _vp); \
453} while (0)
454
455#define ASSERT_VOP_UNLOCKED(vp, str) \
456do { \
457 struct vnode *_vp = (vp); \
458 int lockstate; \
459 \
460 if (_vp && IS_LOCKING_VFS(_vp)) { \
461 lockstate = VOP_ISLOCKED(_vp, curproc); \
462 if (lockstate == LK_EXCLUSIVE) \
463 panic("%s: %p is locked but should not be", \
464 str, _vp); \
465 } \
466} while (0)
467
468#define ASSERT_VOP_ELOCKED(vp, str) \
469do { \
470 struct vnode *_vp = (vp); \
471 \
472 if (_vp && IS_LOCKING_VFS(_vp) && \
473 VOP_ISLOCKED(_vp, curproc) != LK_EXCLUSIVE) \
474 panic("%s: %p is not exclusive locked but should be", \
475 str, _vp); \
476} while (0)
477
478#define ASSERT_VOP_ELOCKED_OTHER(vp, str) \
479do { \
480 struct vnode *_vp = (vp); \
481 \
482 if (_vp && IS_LOCKING_VFS(_vp) && \
483 VOP_ISLOCKED(_vp, curproc) != LK_EXCLOTHER) \
484 panic("%s: %p is not exclusive locked by another proc", \
485 str, _vp); \
486} while (0)
487
488#define ASSERT_VOP_SLOCKED(vp, str) \
489do { \
490 struct vnode *_vp = (vp); \
491 \
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", \
495 str, _vp); \
496} while (0)
497
498#else
499
500#define ASSERT_VOP_LOCKED(vp, str)
501#define ASSERT_VOP_UNLOCKED(vp, str)
502
503#endif
504
505/*
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
508 * vector.
509 */
510#define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
511
512/*
513 * This call works for vnodes in the kernel.
514 */
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)
518
519/*
520 * VMIO support inline
521 */
522
523extern int vmiodirenable;
524
525static __inline int
526vn_canvmio(struct vnode *vp)
527{
528 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
529 return(TRUE);
530 return(FALSE);
531}
532
533/*
534 * Finally, include the default set of vnode operations.
535 */
536#include "vnode_if.h"
537
538/*
539 * Public vnode manipulation functions.
540 */
541struct componentname;
542struct file;
543struct mount;
544struct nameidata;
545struct ostat;
546struct proc;
547struct stat;
548struct nstat;
549struct ucred;
550struct uio;
551struct vattr;
552struct vnode;
553struct vop_bwrite_args;
554
555extern int (*lease_check_hook) __P((struct vop_lease_args *));
556
557void addalias __P((struct vnode *vp, dev_t nvp_rdev));
558void addaliasu __P((struct vnode *vp, udev_t nvp_rdev));
559int bdevvp __P((dev_t dev, struct vnode **vpp));
560/* cache_* may belong in namei.h. */
561void cache_enter __P((struct vnode *dvp, struct vnode *vp,
562 struct componentname *cnp));
563int cache_lookup __P((struct vnode *dvp, struct vnode **vpp,
564 struct componentname *cnp));
565void cache_purge __P((struct vnode *vp));
566void cache_purgevfs __P((struct mount *mp));
567int cache_leaf_test __P((struct vnode *vp));
568void cvtstat __P((struct stat *st, struct ostat *ost));
569void cvtnstat __P((struct stat *sb, struct nstat *nsb));
570int getnewvnode __P((enum vtagtype tag,
571 struct mount *mp, vop_t **vops, struct vnode **vpp));
572int lease_check __P((struct vop_lease_args *ap));
573int spec_vnoperate __P((struct vop_generic_args *));
574int speedup_syncer __P((void));
575int textvp_fullpath __P((struct proc *p, char **retbuf, char **retfreebuf));
576void vattr_null __P((struct vattr *vap));
577int vcount __P((struct vnode *vp));
578void vdrop __P((struct vnode *));
579int vfinddev __P((dev_t dev, enum vtype type, struct vnode **vpp));
580void vfs_add_vnodeops __P((const void *));
581void vfs_rm_vnodeops __P((const void *));
582int vflush __P((struct mount *mp, int rootrefs, int flags));
583int vget __P((struct vnode *vp, int lockflag, struct proc *p));
584void vgone __P((struct vnode *vp));
585void vgonel __P((struct vnode *vp, struct proc *p));
586void vhold __P((struct vnode *));
587int vinvalbuf __P((struct vnode *vp, int save, struct ucred *cred,
588
589 struct proc *p, int slpflag, int slptimeo));
590int vtruncbuf __P((struct vnode *vp, struct ucred *cred, struct proc *p,
591 off_t length, int blksize));
592void vprint __P((char *label, struct vnode *vp));
593int vrecycle __P((struct vnode *vp, struct simplelock *inter_lkp,
594 struct proc *p));
595int vn_close __P((struct vnode *vp,
596 int flags, struct ucred *cred, struct proc *p));
597int vn_isdisk __P((struct vnode *vp, int *errp));
598int vn_lock __P((struct vnode *vp, int flags, struct proc *p));
599#ifdef DEBUG_LOCKS
600int debug_vn_lock __P((struct vnode *vp, int flags, struct proc *p,
601 const char *filename, int line));
602#define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
603#endif
604int vn_open __P((struct nameidata *ndp, int fmode, int cmode));
605void vn_pollevent __P((struct vnode *vp, int events));
606void vn_pollgone __P((struct vnode *vp));
607int vn_pollrecord __P((struct vnode *vp, struct proc *p, int events));
608int vn_rdwr __P((enum uio_rw rw, struct vnode *vp, caddr_t base,
609 int len, off_t offset, enum uio_seg segflg, int ioflg,
610 struct ucred *cred, int *aresid, struct proc *p));
611int vn_rdwr_inchunks __P((enum uio_rw rw, struct vnode *vp, caddr_t base,
612 int len, off_t offset, enum uio_seg segflg, int ioflg,
613 struct ucred *cred, int *aresid, struct proc *p));
614int vn_stat __P((struct vnode *vp, struct stat *sb, struct proc *p));
615dev_t vn_todev __P((struct vnode *vp));
616int vfs_cache_lookup __P((struct vop_lookup_args *ap));
617int vfs_object_create __P((struct vnode *vp, struct proc *p,
618 struct ucred *cred));
619void vfs_timestamp __P((struct timespec *));
620int vn_writechk __P((struct vnode *vp));
621int vop_stdbwrite __P((struct vop_bwrite_args *ap));
622int vop_stdislocked __P((struct vop_islocked_args *));
623int vop_stdlock __P((struct vop_lock_args *));
624int vop_stdunlock __P((struct vop_unlock_args *));
625int vop_noislocked __P((struct vop_islocked_args *));
626int vop_nolock __P((struct vop_lock_args *));
627int vop_nopoll __P((struct vop_poll_args *));
628int vop_nounlock __P((struct vop_unlock_args *));
629int vop_stdpathconf __P((struct vop_pathconf_args *));
630int vop_stdpoll __P((struct vop_poll_args *));
631int vop_revoke __P((struct vop_revoke_args *));
632int vop_sharedlock __P((struct vop_lock_args *));
633int vop_eopnotsupp __P((struct vop_generic_args *ap));
634int vop_ebadf __P((struct vop_generic_args *ap));
635int vop_einval __P((struct vop_generic_args *ap));
636int vop_enotty __P((struct vop_generic_args *ap));
637int vop_defaultop __P((struct vop_generic_args *ap));
638int vop_null __P((struct vop_generic_args *ap));
639int vop_panic __P((struct vop_generic_args *ap));
640int vop_stdcreatevobject __P((struct vop_createvobject_args *ap));
641int vop_stddestroyvobject __P((struct vop_destroyvobject_args *ap));
642int vop_stdgetvobject __P((struct vop_getvobject_args *ap));
643
644void vfree __P((struct vnode *vp));
645void vput __P((struct vnode *vp));
646void vrele __P((struct vnode *vp));
647void vref __P((struct vnode *vp));
648void vbusy __P((struct vnode *vp));
649
650extern vop_t **default_vnodeop_p;
651extern vop_t **spec_vnodeop_p;
652
653#endif /* _KERNEL */
654
655#endif /* !_SYS_VNODE_H_ */