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 1.43 2006/03/27 01:54:16 dillon Exp $
41 #include <sys/queue.h>
43 #include <sys/select.h>
44 #include <sys/biotrack.h>
47 #include <sys/namecache.h>
48 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
49 #include <sys/thread.h>
51 #include <sys/vfsops.h>
52 #include <sys/vfscache.h>
55 #include <machine/lock.h>
58 * The vnode is the focus of all file activity in UNIX. There is a
59 * unique vnode allocated for each active file, each current directory,
60 * each mounted-on file, text file, and the root.
64 * Each underlying filesystem allocates its own private area and hangs
65 * it from v_data. If non-null, this area is freed in getnewvnode().
67 TAILQ_HEAD(buflists, buf);
70 * Range locks protect offset ranges in files and directories at a high
71 * level, allowing the actual I/O to be broken down into smaller pieces.
72 * Range locks will eventually be integrated into the clustered cache
73 * coherency infrastructure.
75 * We use a simple data structure for now, but eventually this should
76 * probably be a btree or red-black tree.
80 TAILQ_HEAD(vrangelock_list, vrangelock);
83 struct vrangelock_list vh_list;
87 TAILQ_ENTRY(vrangelock) vr_node;
93 #define RNGL_WAITING 0x0001 /* waiting for lock, else has lock */
94 #define RNGL_CHECK 0x0002 /* check for work on unlock */
95 #define RNGL_SHARED 0x0004 /* shared lock, else exclusive */
96 #define RNGL_ONLIST 0x0008 /* sanity check */
100 vrange_init(struct vrangelock *vr, int flags, off_t offset, off_t length)
102 vr->vr_flags = flags;
103 vr->vr_offset = offset;
104 vr->vr_length = length;
109 void vrange_lock(struct vnode *vp, struct vrangelock *vr);
110 void vrange_unlock(struct vnode *vp, struct vrangelock *vr);
114 vrange_lock_shared(struct vnode *vp, struct vrangelock *vr,
115 off_t offset, off_t length)
117 vrange_init(vr, RNGL_SHARED, offset, length);
123 vrange_lock_excl(struct vnode *vp, struct vrangelock *vr,
124 off_t offset, off_t length)
126 vrange_init(vr, 0, offset, length);
133 * The vnode infrastructure is being reorgranized. Most reference-related
134 * fields are locked by the BGL, and most file I/O related operations and
135 * vnode teardown functions are locked by the vnode lock.
137 * File read operations require a shared lock, file write operations require
138 * an exclusive lock. Most directory operations (read or write) currently
139 * require an exclusive lock due to the side effects stored in the directory
140 * inode (which we intend to fix).
142 * File reads and writes are further protected by a range lock. The intention
143 * is to be able to break I/O operations down into more easily managed pieces
144 * so vm_page arrays can be passed through rather then UIOs. This work will
145 * occur in multiple stages. The range locks will also eventually be used to
146 * deal with clustered cache coherency issues and, more immediately, to
147 * protect operations associated with the kernel-managed journaling module.
149 * NOTE: XXX v_opencount currently only used by specfs. It should be used
152 * NOTE: The vnode operations vector, v_ops, is a double-indirect that
153 * typically points to &v_mount->mnt_vn_use_ops. We use a double
154 * pointer because mnt_vn_use_ops may change dynamically when e.g.
155 * journaling is turned on or off.
157 * NOTE: v_filesize is currently only applicable when a VM object is
158 * associated with the vnode. Otherwise it will be set to NOOFFSET.
160 RB_HEAD(buf_rb_tree, buf);
161 RB_HEAD(buf_rb_hash, buf);
164 u_long v_flag; /* vnode flags (see below) */
165 int v_usecount; /* reference count of users */
167 int v_holdcnt; /* page & buffer references */
168 int v_opencount; /* number of explicit opens */
169 struct bio_track v_track_read; /* track I/O's in progress */
170 struct bio_track v_track_write; /* track I/O's in progress */
171 u_long v_id; /* capability identifier */
172 struct mount *v_mount; /* ptr to vfs we are in */
173 struct vop_ops **v_ops; /* vnode operations vector */
174 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */
175 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */
176 struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */
177 struct buf_rb_tree v_rbdirty_tree; /* RB tree of dirty bufs */
178 struct buf_rb_hash v_rbhash_tree; /* RB tree general lookup */
179 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */
180 enum vtype v_type; /* vnode type */
182 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
183 struct socket *vu_socket; /* unix ipc (VSOCK) */
185 udev_t vu_udev; /* device number for attach */
186 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */
187 SLIST_ENTRY(vnode) vu_specnext;
189 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
191 struct nqlease *v_lease; /* Soft reference to lease */
192 off_t v_filesize; /* file EOF or NOOFFSET */
193 off_t v_lazyw; /* lazy write iterator */
194 off_t v_lastw; /* last write (write cluster) */
195 off_t v_cstart; /* start block of cluster */
196 off_t v_lasta; /* last allocation */
197 int v_clen; /* length of current cluster */
198 struct vm_object *v_object; /* Place to store VM object */
199 struct lock v_lock; /* file/dir ops lock */
200 enum vtagtype v_tag; /* type of underlying data */
201 void *v_data; /* private data for fs */
202 struct namecache_list v_namecache; /* associated nc entries */
204 struct lwkt_token vpi_token; /* lock to protect below */
205 struct selinfo vpi_selinfo; /* identity of poller(s) */
206 short vpi_events; /* what they are looking for */
207 short vpi_revents; /* what has happened */
209 struct vmresident *v_resident; /* optional vmresident */
210 struct vrangehead v_range; /* range lock */
212 const char *filename; /* Source file doing locking */
213 int line; /* Line number doing locking */
217 #define v_mountedhere v_un.vu_mountedhere
218 #define v_socket v_un.vu_socket
219 #define v_udev v_un.vu_spec.vu_udev
220 #define v_rdev v_un.vu_spec.vu_specinfo
221 #define v_specnext v_un.vu_spec.vu_specnext
222 #define v_fifoinfo v_un.vu_fifoinfo
224 #define VN_POLLEVENT(vp, events) \
226 if ((vp)->v_pollinfo.vpi_events & (events)) \
227 vn_pollevent((vp), (events)); \
233 #define VROOT 0x00001 /* root of its file system */
234 #define VTEXT 0x00002 /* vnode is a pure text prototype */
235 #define VSYSTEM 0x00004 /* vnode being used by kernel */
236 #define VISTTY 0x00008 /* vnode represents a tty */
237 #define VCTTYISOPEN 0x00010 /* controlling terminal tty is open */
238 #define VCKPT 0x00020 /* checkpoint-restored vnode */
239 /* open for business 0x00040 */
240 /* open for business 0x00080 */
241 /* open for business 0x00100 */
242 /* open for business 0x00200 */
243 /* open for business 0x00400 */
244 /* open for business 0x00800 */
245 /* open for business 0x01000 */
246 #define VOBJBUF 0x02000 /* Allocate buffers in VM object */
247 #define VINACTIVE 0x04000 /* The vnode is inactive */
248 #define VAGE 0x08000 /* Insert vnode at head of free list */
249 #define VOLOCK 0x10000 /* vnode is locked waiting for an object */
250 #define VOWANT 0x20000 /* a process is waiting for VOLOCK */
251 #define VRECLAIMED 0x40000 /* This vnode has been destroyed */
252 #define VFREE 0x80000 /* This vnode is on the freelist */
253 /* open for business 0x100000 */
254 #define VONWORKLST 0x200000 /* On syncer work-list */
255 #define VMOUNT 0x400000 /* Mount in progress */
256 #define VOBJDIRTY 0x800000 /* object might be dirty */
259 * vmntvnodescan() flags
264 #define VMSC_NOWAIT 0x10
267 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
268 * help with write clustering)
270 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
271 #define IO_APPEND 0x0002 /* append write to end */
272 #define IO_SYNC 0x0004 /* do I/O synchronously */
273 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
274 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
275 #define IO_VMIO 0x0020 /* data already in VMIO space */
276 #define IO_INVAL 0x0040 /* invalidate after I/O */
277 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
278 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
279 #define IO_NOWDRAIN 0x0200 /* do not block on wdrain */
280 #define IO_CORE 0x0400 /* I/O is part of core dump */
282 #define IO_SEQMAX 0x7F /* seq heuristic max value */
283 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
286 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID,
287 * and SVTX flag bits.
289 * VCREATE, VDELETE, and VEXCL may only be used in naccess() calls.
291 #define VDELETE 040000 /* delete if the file/dir exists */
292 #define VCREATE 020000 /* create if the file/dir does not exist */
293 #define VEXCL 010000 /* error if the file/dir already exists */
295 #define VSUID 04000 /* set user id on execution */
296 #define VSGID 02000 /* set group id on execution */
297 #define VSVTX 01000 /* save swapped text even after use */
298 #define VREAD 00400 /* read, write, execute permissions */
303 * Token indicating no attribute value yet assigned.
308 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
310 #define VLKTIMEOUT (hz / 20 + 1)
315 * Convert between vnode types and inode formats (since POSIX.1
316 * defines mode word of stat structure in terms of inode formats).
318 extern enum vtype iftovt_tab[];
319 extern int vttoif_tab[];
320 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
321 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
322 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
325 * Flags to various vnode functions.
327 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
328 #define FORCECLOSE 0x0002 /* vflush: force file closure */
329 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
330 #define DOCLOSE 0x0008 /* vclean: close active files */
331 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
332 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
335 #define VATTR_NULL(vap) vattr_null(vap)
337 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
338 #endif /* DIAGNOSTIC */
340 #define NULLVP ((struct vnode *)NULL)
342 #define VNODEOP_SET(f) \
343 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops_sysinit, &f); \
344 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_rm_vnodeops_sysinit, &f);
349 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
350 extern struct namecache *rootncp; /* 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 vm_zone *namei_zone;
357 extern int prtactive; /* nonzero to call vprint() */
358 extern struct vattr va_null; /* predefined null vattr structure */
359 extern int vfs_ioopt;
360 extern int numvnodes;
361 extern int freevnodes;
362 extern int vfs_fastdev; /* fast specfs device access */
365 * Macro/function to check for client cache inconsistency w.r.t. leasing.
367 #define LEASE_READ 0x1 /* Check lease for readers */
368 #define LEASE_WRITE 0x2 /* Check lease for modifiers */
371 extern void (*lease_updatetime) (int deltat);
376 * Mods for extensibility.
380 * Flags for vdesc_flags:
382 #define VDESC_MAX_VPS 8
383 /* Low order 8 flag bits are reserved for willrele flags for vp arguments. */
384 #define VDESC_VP0_WILLRELE 0x00000001
385 #define VDESC_VP1_WILLRELE 0x00000002
386 #define VDESC_VP2_WILLRELE 0x00000004
387 #define VDESC_VP3_WILLRELE 0x00000008
388 #define VDESC_VP4_WILLRELE 0x00000010
389 #define VDESC_VP5_WILLRELE 0x00000020
390 #define VDESC_VP6_WILLRELE 0x00000040
391 #define VDESC_VP7_WILLRELE 0x00000080
392 #define VDESC_NOMAP_VPP 0x00000100
393 #define VDESC_VPP_WILLRELE 0x00000200
394 #define VDESC_VP0_WILLUNLOCK 0x00010000
395 #define VDESC_VP1_WILLUNLOCK 0x00020000
396 #define VDESC_VP2_WILLUNLOCK 0x00040000
397 #define VDESC_VP3_WILLUNLOCK 0x00080000
398 #define VDESC_VP4_WILLUNLOCK 0x00100000
399 #define VDESC_VP5_WILLUNLOCK 0x00200000
400 #define VDESC_VP6_WILLUNLOCK 0x00400000
401 #define VDESC_VP7_WILLUNLOCK 0x00800000
404 * VDESC_NO_OFFSET is used to identify the end of the offset list
405 * and in places where no such field exists.
407 #define VDESC_NO_OFFSET -1
410 * This structure describes the vnode operation taking place.
412 struct vnodeop_desc {
413 int vdesc_offset; /* offset in vector--first for speed */
414 char *vdesc_name; /* a readable name for debugging */
415 int vdesc_flags; /* VDESC_* flags */
418 * These ops are used by bypass routines to map and locate arguments.
419 * Creds and procs are not needed in bypass routines, but sometimes
420 * they are useful to (for example) transport layers.
421 * Nameidata is useful because it has a cred in it.
423 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
424 int vdesc_vpp_offset; /* return vpp location */
425 int vdesc_cred_offset; /* cred location, if any */
426 int vdesc_proc_offset; /* proc location, if any */
427 int vdesc_componentname_offset; /* if any */
432 * A list of all the operation descs.
434 extern struct vnodeop_desc *vnodeop_descs[];
437 * Interlock for scanning list of vnodes attached to a mountpoint
439 extern struct lwkt_token mntvnode_token;
442 * This macro is very helpful in defining those offsets in the vdesc struct.
444 * This is stolen from X11R4. I ignored all the fancy stuff for
445 * Crays, so if you decide to port this to such a serious machine,
446 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
448 #define VOPARG_OFFSET(p_type,field) \
449 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
450 #define VOPARG_OFFSETOF(s_type,field) \
451 VOPARG_OFFSET(s_type*,field)
452 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
453 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
455 typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
458 * This structure is used to configure the new vnodeops vector. The entry
459 * descriptor describes a patricular VOP function while the operations
460 * vector descriptor recursively describes arrays of entry descriptors.
462 struct vnodeopv_entry_desc {
463 struct vnodeop_desc *opve_op;
464 vnodeopv_entry_t opve_func;
467 struct vnodeopv_desc {
468 struct vop_ops **opv_desc_vector; /* vect to allocate/fill*/
469 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */
473 struct vnodeopv_node {
474 TAILQ_ENTRY(vnodeopv_node) entry;
475 struct vop_ops *ops; /* allocated vector */
476 struct vnodeopv_entry_desc *descs; /* null terminated list */
479 #ifdef DEBUG_VFS_LOCKS
481 * Macros to aid in tracing VFS locking problems. Not totally
482 * reliable since if the process sleeps between changing the lock
483 * state and checking it with the assert, some other process could
484 * change the state. They are good enough for debugging a single
485 * filesystem using a single-threaded test. I find that 'cvs co src'
486 * is a pretty good test.
490 * [dfr] Kludge until I get around to fixing all the vfs locking.
492 #define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \
493 || (vp)->v_tag == VT_MFS \
494 || (vp)->v_tag == VT_NFS \
495 || (vp)->v_tag == VT_LFS \
496 || (vp)->v_tag == VT_ISOFS \
497 || (vp)->v_tag == VT_MSDOSFS)
499 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked(vp, str)
500 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked(vp, str);
502 #define ASSERT_VOP_ELOCKED(vp, str) \
504 struct vnode *_vp = (vp); \
506 if (_vp && IS_LOCKING_VFS(_vp) && \
507 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \
508 panic("%s: %p is not exclusive locked but should be", \
512 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) \
514 struct vnode *_vp = (vp); \
516 if (_vp && IS_LOCKING_VFS(_vp) && \
517 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \
518 panic("%s: %p is not exclusive locked by another proc", \
522 #define ASSERT_VOP_SLOCKED(vp, str) \
524 struct vnode *_vp = (vp); \
526 if (_vp && IS_LOCKING_VFS(_vp) && \
527 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \
528 panic("%s: %p is not locked shared but should be", \
532 void assert_vop_locked(struct vnode *vp, const char *str);
533 void assert_vop_unlocked(struct vnode *vp, const char *str);
537 #define ASSERT_VOP_LOCKED(vp, str)
538 #define ASSERT_VOP_UNLOCKED(vp, str)
540 #endif /* DEBUG_VFS_LOCKS */
543 * VOCALL calls an op given an ops vector. We break it out because BSD's
544 * vclean changes the ops vector and then wants to call ops with the old
548 typedef int (*vocall_func_t)(struct vop_generic_args *);
551 * This call executes the vops vector for the offset stored in the ap's
552 * descriptor of the passed vops rather then the one related to the
553 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of
554 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
557 #define VOCALL(vops, ap) \
558 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->vdesc_offset)))(ap)
560 #define VDESC(OP) (& __CONCAT(OP,_desc))
561 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
564 * VMIO support inline
567 extern int vmiodirenable;
570 vn_canvmio(struct vnode *vp)
572 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
578 * Public vnode manipulation functions.
590 struct vop_bwrite_args;
592 extern int (*lease_check_hook) (struct vop_lease_args *);
594 void addaliasu (struct vnode *vp, udev_t nvp_udev);
595 int v_associate_rdev(struct vnode *vp, dev_t dev);
596 void v_release_rdev(struct vnode *vp);
597 int bdevvp (dev_t dev, struct vnode **vpp);
598 struct vnode *allocvnode(int lktimeout, int lkflags);
599 int getnewvnode (enum vtagtype tag, struct mount *mp,
600 struct vnode **vpp, int timo, int lkflags);
601 int getspecialvnode (enum vtagtype tag, struct mount *mp,
602 struct vop_ops **ops, struct vnode **vpp, int timo,
604 int lease_check (struct vop_lease_args *ap);
605 int spec_vnoperate (struct vop_generic_args *);
606 int speedup_syncer (void);
607 void vattr_null (struct vattr *vap);
608 int vcount (struct vnode *vp);
609 int vfinddev (dev_t dev, enum vtype type, struct vnode **vpp);
610 void vfs_add_vnodeops_sysinit (const void *);
611 void vfs_rm_vnodeops_sysinit (const void *);
612 void vfs_add_vnodeops(struct mount *, struct vop_ops **,
613 struct vnodeopv_entry_desc *, int);
614 void vfs_rm_vnodeops(struct vop_ops **);
615 int vflush (struct mount *mp, int rootrefs, int flags);
616 int vmntvnodescan(struct mount *mp, int flags,
617 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
618 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
620 void insmntque(struct vnode *vp, struct mount *mp);
622 void vclean (struct vnode *vp, int flags, struct thread *td);
623 void vgone (struct vnode *vp);
624 int vinvalbuf (struct vnode *vp, int save,
625 struct thread *td, int slpflag, int slptimeo);
626 int vtruncbuf (struct vnode *vp, struct thread *td,
627 off_t length, int blksize);
628 int vfsync(struct vnode *vp, int waitfor, int passes, off_t loffset,
629 int (*checkdef)(struct buf *),
630 int (*waitoutput)(struct vnode *, struct thread *));
631 void vprint (char *label, struct vnode *vp);
632 int vrecycle (struct vnode *vp, struct thread *td);
633 void vn_strategy(struct vnode *vp, struct bio *bio);
634 int vn_close (struct vnode *vp, int flags, struct thread *td);
635 int vn_isdisk (struct vnode *vp, int *errp);
636 int vn_lock (struct vnode *vp, int flags, struct thread *td);
638 int debug_vn_lock (struct vnode *vp, int flags, struct thread *td,
639 const char *filename, int line);
640 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
643 int vn_get_namelen(struct vnode *, int *);
644 void vn_setspecops (struct file *fp);
645 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf);
646 int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
647 void vn_pollevent (struct vnode *vp, int events);
648 void vn_pollgone (struct vnode *vp);
649 int vn_pollrecord (struct vnode *vp, struct thread *td, int events);
650 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
651 int len, off_t offset, enum uio_seg segflg, int ioflg,
652 struct ucred *cred, int *aresid, struct thread *td);
653 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
654 int len, off_t offset, enum uio_seg segflg, int ioflg,
655 struct ucred *cred, int *aresid, struct thread *td);
656 int vn_stat (struct vnode *vp, struct stat *sb, struct thread *td);
657 dev_t vn_todev (struct vnode *vp);
658 int vfs_object_create (struct vnode *vp, struct thread *td);
659 void vfs_timestamp (struct timespec *);
660 int vn_writechk (struct vnode *vp);
661 int vop_stdbwrite (struct vop_bwrite_args *ap);
662 int vop_stdislocked (struct vop_islocked_args *ap);
663 int vop_stdlock (struct vop_lock_args *ap);
664 int vop_stdrlock (struct vop_lock_args *ap);
665 int vop_stdunlock (struct vop_unlock_args *ap);
666 int vop_nopoll (struct vop_poll_args *ap);
667 int vop_stdpathconf (struct vop_pathconf_args *ap);
668 int vop_stdpoll (struct vop_poll_args *ap);
669 int vop_stdrevoke (struct vop_revoke_args *ap);
670 int vop_eopnotsupp (struct vop_generic_args *ap);
671 int vop_ebadf (struct vop_generic_args *ap);
672 int vop_einval (struct vop_generic_args *ap);
673 int vop_enotty (struct vop_generic_args *ap);
674 int vop_defaultop (struct vop_generic_args *ap);
675 int vop_null (struct vop_generic_args *ap);
676 int vop_panic (struct vop_generic_args *ap);
677 int vop_stdcreatevobject (struct vop_createvobject_args *ap);
678 int vop_stddestroyvobject (struct vop_destroyvobject_args *ap);
679 int vop_stdgetvobject (struct vop_getvobject_args *ap);
680 int vop_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t,
683 int vop_compat_nresolve(struct vop_nresolve_args *ap);
684 int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
685 int vop_compat_ncreate(struct vop_ncreate_args *ap);
686 int vop_compat_nmkdir(struct vop_nmkdir_args *ap);
687 int vop_compat_nmknod(struct vop_nmknod_args *ap);
688 int vop_compat_nlink(struct vop_nlink_args *ap);
689 int vop_compat_nsymlink(struct vop_nsymlink_args *ap);
690 int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
691 int vop_compat_nremove(struct vop_nremove_args *ap);
692 int vop_compat_nrmdir(struct vop_nrmdir_args *ap);
693 int vop_compat_nrename(struct vop_nrename_args *ap);
695 int vx_lock (struct vnode *vp);
696 void vx_unlock (struct vnode *vp);
697 int vx_get (struct vnode *vp);
698 int vx_get_nonblock (struct vnode *vp);
699 void vx_put (struct vnode *vp);
700 int vget (struct vnode *vp, int lockflag, struct thread *td);
701 void vput (struct vnode *vp);
702 void vhold (struct vnode *);
703 void vdrop (struct vnode *);
704 void vref (struct vnode *vp);
705 void vrele (struct vnode *vp);
706 void vsetflags (struct vnode *vp, int flags);
707 void vclrflags (struct vnode *vp, int flags);
709 void vfs_subr_init(void);
710 void vfs_mount_init(void);
711 void vfs_lock_init(void);
712 void vfs_sync_init(void);
714 void vn_syncer_add_to_worklist(struct vnode *, int);
715 void vnlru_proc_wait(void);
717 extern struct vop_ops *default_vnode_vops;
718 extern struct vop_ops *spec_vnode_vops;
719 extern struct vop_ops *dead_vnode_vops;
723 #endif /* !_SYS_VNODE_H_ */