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
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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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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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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 1.33 2005/04/20 17:01:51 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>
54 #include <machine/lock.h>
57 * The vnode is the focus of all file activity in UNIX. There is a
58 * unique vnode allocated for each active file, each current directory,
59 * each mounted-on file, text file, and the root.
63 * Each underlying filesystem allocates its own private area and hangs
64 * it from v_data. If non-null, this area is freed in getnewvnode().
66 TAILQ_HEAD(buflists, buf);
69 * Range locks protect offset ranges in files and directories at a high
70 * level, allowing the actual I/O to be broken down into smaller pieces.
71 * Range locks will eventually be integrated into the clustered cache
72 * coherency infrastructure.
74 * We use a simple data structure for now, but eventually this should
75 * probably be a btree or red-black tree.
79 TAILQ_HEAD(vrangelock_list, vrangelock);
82 struct vrangelock_list vh_list;
86 TAILQ_ENTRY(vrangelock) vr_node;
92 #define RNGL_WAITING 0x0001 /* waiting for lock, else has lock */
93 #define RNGL_CHECK 0x0002 /* check for work on unlock */
94 #define RNGL_SHARED 0x0004 /* shared lock, else exclusive */
95 #define RNGL_ONLIST 0x0008 /* sanity check */
99 vrange_init(struct vrangelock *vr, int flags, off_t offset, off_t length)
101 vr->vr_flags = flags;
102 vr->vr_offset = offset;
103 vr->vr_length = length;
108 void vrange_lock(struct vnode *vp, struct vrangelock *vr);
109 void vrange_unlock(struct vnode *vp, struct vrangelock *vr);
113 vrange_lock_shared(struct vnode *vp, struct vrangelock *vr,
114 off_t offset, off_t length)
116 vrange_init(vr, RNGL_SHARED, offset, length);
122 vrange_lock_excl(struct vnode *vp, struct vrangelock *vr,
123 off_t offset, off_t length)
125 vrange_init(vr, 0, offset, length);
132 * The vnode infrastructure is being reorgranized. Most reference-related
133 * fields are locked by the BGL, and most file I/O related operations and
134 * vnode teardown functions are locked by the vnode lock.
136 * File read operations require a shared lock, file write operations require
137 * an exclusive lock. Most directory operations (read or write) currently
138 * require an exclusive lock due to the side effects stored in the directory
139 * inode (which we intend to fix).
141 * File reads and writes are further protected by a range lock. The intention
142 * is to be able to break I/O operations down into more easily managed pieces
143 * so vm_page arrays can be passed through rather then UIOs. This work will
144 * occur in multiple stages. The range locks will also eventually be used to
145 * deal with clustered cache coherency issues and, more immediately, to
146 * protect operations associated with the kernel-managed journaling module.
148 * NOTE: XXX v_opencount currently only used by specfs. It should be used
151 * NOTE: The vnode operations vector, v_ops, is a double-indirect that
152 * typically points to &v_mount->mnt_vn_use_ops. We use a double
153 * pointer because mnt_vn_use_ops may change dynamically when e.g.
154 * journaling is turned on or off.
156 RB_HEAD(buf_rb_tree, buf);
159 u_long v_flag; /* vnode flags (see below) */
160 int v_usecount; /* reference count of users */
161 int v_writecount; /* reference count of writers */
162 int v_holdcnt; /* page & buffer references */
163 int v_opencount; /* number of explicit opens */
164 u_long v_id; /* capability identifier */
165 struct mount *v_mount; /* ptr to vfs we are in */
166 struct vop_ops **v_ops; /* vnode operations vector */
167 TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */
168 TAILQ_ENTRY(vnode) v_nmntvnodes; /* vnodes for mount point */
169 struct buf_rb_tree v_rbclean_tree; /* RB tree of clean bufs */
170 struct buf_rb_tree v_rbdirty_tree; /* RB tree of clean bufs */
171 LIST_ENTRY(vnode) v_synclist; /* vnodes with dirty buffers */
172 long v_numoutput; /* num of writes in progress */
173 enum vtype v_type; /* vnode type */
175 struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */
176 struct socket *vu_socket; /* unix ipc (VSOCK) */
178 udev_t vu_udev; /* device number for attach */
179 struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */
180 SLIST_ENTRY(vnode) vu_specnext;
182 struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */
184 struct nqlease *v_lease; /* Soft reference to lease */
185 daddr_t v_lazyw; /* lazy write iterator */
186 daddr_t v_lastw; /* last write (write cluster) */
187 daddr_t v_cstart; /* start block of cluster */
188 daddr_t v_lasta; /* last allocation */
189 int v_clen; /* length of current cluster */
190 struct vm_object *v_object; /* Place to store VM object */
191 struct lock v_lock; /* file/dir ops lock */
192 enum vtagtype v_tag; /* type of underlying data */
193 void *v_data; /* private data for fs */
194 struct namecache_list v_namecache; /* associated nc entries */
196 struct lwkt_token vpi_token; /* lock to protect below */
197 struct selinfo vpi_selinfo; /* identity of poller(s) */
198 short vpi_events; /* what they are looking for */
199 short vpi_revents; /* what has happened */
201 struct vmresident *v_resident; /* optional vmresident */
202 struct vrangehead v_range; /* range lock */
204 const char *filename; /* Source file doing locking */
205 int line; /* Line number doing locking */
209 #define v_mountedhere v_un.vu_mountedhere
210 #define v_socket v_un.vu_socket
211 #define v_udev v_un.vu_spec.vu_udev
212 #define v_rdev v_un.vu_spec.vu_specinfo
213 #define v_specnext v_un.vu_spec.vu_specnext
214 #define v_fifoinfo v_un.vu_fifoinfo
216 #define VN_POLLEVENT(vp, events) \
218 if ((vp)->v_pollinfo.vpi_events & (events)) \
219 vn_pollevent((vp), (events)); \
225 #define VROOT 0x00001 /* root of its file system */
226 #define VTEXT 0x00002 /* vnode is a pure text prototype */
227 #define VSYSTEM 0x00004 /* vnode being used by kernel */
228 #define VISTTY 0x00008 /* vnode represents a tty */
229 #define VCTTYISOPEN 0x00010 /* controlling terminal tty is open */
230 #define VCKPT 0x00020 /* checkpoint-restored vnode */
231 /* open for business 0x00040 */
232 /* open for business 0x00080 */
233 /* open for business 0x00100 */
234 /* open for business 0x00200 */
235 #define VBWAIT 0x00400 /* waiting for output to complete */
236 /* open for business 0x00800 */
237 /* open for business 0x01000 */
238 #define VOBJBUF 0x02000 /* Allocate buffers in VM object */
239 #define VINACTIVE 0x04000 /* The vnode is inactive */
240 #define VAGE 0x08000 /* Insert vnode at head of free list */
241 #define VOLOCK 0x10000 /* vnode is locked waiting for an object */
242 #define VOWANT 0x20000 /* a process is waiting for VOLOCK */
243 #define VRECLAIMED 0x40000 /* This vnode has been destroyed */
244 #define VFREE 0x80000 /* This vnode is on the freelist */
245 /* open for business 0x100000 */
246 #define VONWORKLST 0x200000 /* On syncer work-list */
247 #define VMOUNT 0x400000 /* Mount in progress */
248 #define VOBJDIRTY 0x800000 /* object might be dirty */
251 * vmntvnodescan() flags
256 #define VMSC_NOWAIT 0x10
259 * Flags for ioflag. (high 16 bits used to ask for read-ahead and
260 * help with write clustering)
262 #define IO_UNIT 0x0001 /* do I/O as atomic unit */
263 #define IO_APPEND 0x0002 /* append write to end */
264 #define IO_SYNC 0x0004 /* do I/O synchronously */
265 #define IO_NODELOCKED 0x0008 /* underlying node already locked */
266 #define IO_NDELAY 0x0010 /* FNDELAY flag set in file table */
267 #define IO_VMIO 0x0020 /* data already in VMIO space */
268 #define IO_INVAL 0x0040 /* invalidate after I/O */
269 #define IO_ASYNC 0x0080 /* bawrite rather then bdwrite */
270 #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */
271 #define IO_NOWDRAIN 0x0200 /* do not block on wdrain */
272 #define IO_CORE 0x0400 /* I/O is part of core dump */
274 #define IO_SEQMAX 0x7F /* seq heuristic max value */
275 #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */
278 * Modes. Note that these V-modes must match file S_I*USR, SUID, SGID,
279 * and SVTX flag bits.
281 * VCREATE, VDELETE, and VEXCL may only be used in naccess() calls.
283 #define VDELETE 040000 /* delete if the file/dir exists */
284 #define VCREATE 020000 /* create if the file/dir does not exist */
285 #define VEXCL 010000 /* error if the file/dir already exists */
287 #define VSUID 04000 /* set user id on execution */
288 #define VSGID 02000 /* set group id on execution */
289 #define VSVTX 01000 /* save swapped text even after use */
290 #define VREAD 00400 /* read, write, execute permissions */
295 * Token indicating no attribute value yet assigned.
300 * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
302 #define VLKTIMEOUT (hz / 20 + 1)
307 * Convert between vnode types and inode formats (since POSIX.1
308 * defines mode word of stat structure in terms of inode formats).
310 extern enum vtype iftovt_tab[];
311 extern int vttoif_tab[];
312 #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12])
313 #define VTTOIF(indx) (vttoif_tab[(int)(indx)])
314 #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode))
317 * Flags to various vnode functions.
319 #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */
320 #define FORCECLOSE 0x0002 /* vflush: force file closure */
321 #define WRITECLOSE 0x0004 /* vflush: only close writable files */
322 #define DOCLOSE 0x0008 /* vclean: close active files */
323 #define V_SAVE 0x0001 /* vinvalbuf: sync file first */
324 #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */
327 #define VATTR_NULL(vap) vattr_null(vap)
329 #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */
330 #endif /* DIAGNOSTIC */
332 #define NULLVP ((struct vnode *)NULL)
334 #define VNODEOP_SET(f) \
335 C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops_sysinit, &f); \
336 C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_rm_vnodeops_sysinit, &f);
341 extern struct vnode *rootvnode; /* root (i.e. "/") vnode */
342 extern struct namecache *rootncp; /* root (i.e. "/") namecache */
343 extern int desiredvnodes; /* number of vnodes desired */
344 extern time_t syncdelay; /* max time to delay syncing data */
345 extern time_t filedelay; /* time to delay syncing files */
346 extern time_t dirdelay; /* time to delay syncing directories */
347 extern time_t metadelay; /* time to delay syncing metadata */
348 extern struct vm_zone *namei_zone;
349 extern int prtactive; /* nonzero to call vprint() */
350 extern struct vattr va_null; /* predefined null vattr structure */
351 extern int vfs_ioopt;
352 extern int numvnodes;
353 extern int freevnodes;
354 extern int vfs_fastdev; /* fast specfs device access */
357 * Macro/function to check for client cache inconsistency w.r.t. leasing.
359 #define LEASE_READ 0x1 /* Check lease for readers */
360 #define LEASE_WRITE 0x2 /* Check lease for modifiers */
363 extern void (*lease_updatetime) (int deltat);
368 * Mods for extensibility.
372 * Flags for vdesc_flags:
374 #define VDESC_MAX_VPS 8
375 /* Low order 8 flag bits are reserved for willrele flags for vp arguments. */
376 #define VDESC_VP0_WILLRELE 0x00000001
377 #define VDESC_VP1_WILLRELE 0x00000002
378 #define VDESC_VP2_WILLRELE 0x00000004
379 #define VDESC_VP3_WILLRELE 0x00000008
380 #define VDESC_VP4_WILLRELE 0x00000010
381 #define VDESC_VP5_WILLRELE 0x00000020
382 #define VDESC_VP6_WILLRELE 0x00000040
383 #define VDESC_VP7_WILLRELE 0x00000080
384 #define VDESC_NOMAP_VPP 0x00000100
385 #define VDESC_VPP_WILLRELE 0x00000200
386 #define VDESC_VP0_WILLUNLOCK 0x00010000
387 #define VDESC_VP1_WILLUNLOCK 0x00020000
388 #define VDESC_VP2_WILLUNLOCK 0x00040000
389 #define VDESC_VP3_WILLUNLOCK 0x00080000
390 #define VDESC_VP4_WILLUNLOCK 0x00100000
391 #define VDESC_VP5_WILLUNLOCK 0x00200000
392 #define VDESC_VP6_WILLUNLOCK 0x00400000
393 #define VDESC_VP7_WILLUNLOCK 0x00800000
396 * VDESC_NO_OFFSET is used to identify the end of the offset list
397 * and in places where no such field exists.
399 #define VDESC_NO_OFFSET -1
402 * This structure describes the vnode operation taking place.
404 struct vnodeop_desc {
405 int vdesc_offset; /* offset in vector--first for speed */
406 char *vdesc_name; /* a readable name for debugging */
407 int vdesc_flags; /* VDESC_* flags */
410 * These ops are used by bypass routines to map and locate arguments.
411 * Creds and procs are not needed in bypass routines, but sometimes
412 * they are useful to (for example) transport layers.
413 * Nameidata is useful because it has a cred in it.
415 int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */
416 int vdesc_vpp_offset; /* return vpp location */
417 int vdesc_cred_offset; /* cred location, if any */
418 int vdesc_proc_offset; /* proc location, if any */
419 int vdesc_componentname_offset; /* if any */
424 * A list of all the operation descs.
426 extern struct vnodeop_desc *vnodeop_descs[];
429 * Interlock for scanning list of vnodes attached to a mountpoint
431 extern struct lwkt_token mntvnode_token;
434 * This macro is very helpful in defining those offsets in the vdesc struct.
436 * This is stolen from X11R4. I ignored all the fancy stuff for
437 * Crays, so if you decide to port this to such a serious machine,
438 * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
440 #define VOPARG_OFFSET(p_type,field) \
441 ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
442 #define VOPARG_OFFSETOF(s_type,field) \
443 VOPARG_OFFSET(s_type*,field)
444 #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
445 ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
447 typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
450 * This structure is used to configure the new vnodeops vector. The entry
451 * descriptor describes a patricular VOP function while the operations
452 * vector descriptor recursively describes arrays of entry descriptors.
454 struct vnodeopv_entry_desc {
455 struct vnodeop_desc *opve_op;
456 vnodeopv_entry_t opve_func;
459 struct vnodeopv_desc {
460 struct vop_ops **opv_desc_vector; /* vect to allocate/fill*/
461 struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */
464 struct vnodeopv_node {
465 TAILQ_ENTRY(vnodeopv_node) entry;
466 struct vop_ops *ops; /* allocated vector */
467 struct vnodeopv_entry_desc *descs; /* null terminated list */
470 #ifdef DEBUG_VFS_LOCKS
472 * Macros to aid in tracing VFS locking problems. Not totally
473 * reliable since if the process sleeps between changing the lock
474 * state and checking it with the assert, some other process could
475 * change the state. They are good enough for debugging a single
476 * filesystem using a single-threaded test. I find that 'cvs co src'
477 * is a pretty good test.
481 * [dfr] Kludge until I get around to fixing all the vfs locking.
483 #define IS_LOCKING_VFS(vp) ((vp)->v_tag == VT_UFS \
484 || (vp)->v_tag == VT_MFS \
485 || (vp)->v_tag == VT_NFS \
486 || (vp)->v_tag == VT_LFS \
487 || (vp)->v_tag == VT_ISOFS \
488 || (vp)->v_tag == VT_MSDOSFS)
490 #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked(vp, str)
491 #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked(vp, str);
493 #define ASSERT_VOP_ELOCKED(vp, str) \
495 struct vnode *_vp = (vp); \
497 if (_vp && IS_LOCKING_VFS(_vp) && \
498 VOP_ISLOCKED(_vp, curthread) != LK_EXCLUSIVE) \
499 panic("%s: %p is not exclusive locked but should be", \
503 #define ASSERT_VOP_ELOCKED_OTHER(vp, str) \
505 struct vnode *_vp = (vp); \
507 if (_vp && IS_LOCKING_VFS(_vp) && \
508 VOP_ISLOCKED(_vp, curthread) != LK_EXCLOTHER) \
509 panic("%s: %p is not exclusive locked by another proc", \
513 #define ASSERT_VOP_SLOCKED(vp, str) \
515 struct vnode *_vp = (vp); \
517 if (_vp && IS_LOCKING_VFS(_vp) && \
518 VOP_ISLOCKED(_vp, NULL) != LK_SHARED) \
519 panic("%s: %p is not locked shared but should be", \
523 void assert_vop_locked(struct vnode *vp, const char *str);
524 void assert_vop_unlocked(struct vnode *vp, const char *str);
528 #define ASSERT_VOP_LOCKED(vp, str)
529 #define ASSERT_VOP_UNLOCKED(vp, str)
531 #endif /* DEBUG_VFS_LOCKS */
534 * VOCALL calls an op given an ops vector. We break it out because BSD's
535 * vclean changes the ops vector and then wants to call ops with the old
539 typedef int (*vocall_func_t)(struct vop_generic_args *);
542 * This call executes the vops vector for the offset stored in the ap's
543 * descriptor of the passed vops rather then the one related to the
544 * ap's vop_ops structure. It is used to chain VOPS calls on behalf of
545 * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
548 #define VOCALL(vops, ap) \
549 (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->vdesc_offset)))(ap)
551 #define VDESC(OP) (& __CONCAT(OP,_desc))
552 #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
555 * VMIO support inline
558 extern int vmiodirenable;
561 vn_canvmio(struct vnode *vp)
563 if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
569 * Public vnode manipulation functions.
583 struct vop_bwrite_args;
585 extern int (*lease_check_hook) (struct vop_lease_args *);
587 void addaliasu (struct vnode *vp, udev_t nvp_udev);
588 int v_associate_rdev(struct vnode *vp, dev_t dev);
589 void v_release_rdev(struct vnode *vp);
590 int bdevvp (dev_t dev, struct vnode **vpp);
591 void cvtstat (struct stat *st, struct ostat *ost);
592 void cvtnstat (struct stat *sb, struct nstat *nsb);
593 struct vnode *allocvnode(int lktimeout, int lkflags);
594 int getnewvnode (enum vtagtype tag, struct mount *mp,
595 struct vnode **vpp, int timo, int lkflags);
596 int getspecialvnode (enum vtagtype tag, struct mount *mp,
597 struct vop_ops **ops, struct vnode **vpp, int timo,
599 int lease_check (struct vop_lease_args *ap);
600 int spec_vnoperate (struct vop_generic_args *);
601 int speedup_syncer (void);
602 void vattr_null (struct vattr *vap);
603 int vcount (struct vnode *vp);
604 int vfinddev (dev_t dev, enum vtype type, struct vnode **vpp);
605 void vfs_add_vnodeops_sysinit (const void *);
606 void vfs_rm_vnodeops_sysinit (const void *);
607 void vfs_add_vnodeops(struct mount *, struct vop_ops **,
608 struct vnodeopv_entry_desc *);
609 void vfs_rm_vnodeops(struct vop_ops **);
610 int vflush (struct mount *mp, int rootrefs, int flags);
611 int vmntvnodescan(struct mount *mp, int flags,
612 int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
613 int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
615 void insmntque(struct vnode *vp, struct mount *mp);
617 void vclean (struct vnode *vp, int flags, struct thread *td);
618 void vgone (struct vnode *vp);
619 int vinvalbuf (struct vnode *vp, int save,
620 struct thread *td, int slpflag, int slptimeo);
621 int vtruncbuf (struct vnode *vp, struct thread *td,
622 off_t length, int blksize);
623 int vfsync(struct vnode *vp, int waitfor, int passes, daddr_t lbn,
624 int (*checkdef)(struct buf *),
625 int (*waitoutput)(struct vnode *, struct thread *));
626 void vprint (char *label, struct vnode *vp);
627 int vrecycle (struct vnode *vp, struct thread *td);
628 int vn_close (struct vnode *vp, int flags, struct thread *td);
629 int vn_isdisk (struct vnode *vp, int *errp);
630 int vn_lock (struct vnode *vp, int flags, struct thread *td);
632 int debug_vn_lock (struct vnode *vp, int flags, struct thread *td,
633 const char *filename, int line);
634 #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
637 void vn_setspecops (struct file *fp);
638 int vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf);
639 int vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
640 void vn_pollevent (struct vnode *vp, int events);
641 void vn_pollgone (struct vnode *vp);
642 int vn_pollrecord (struct vnode *vp, struct thread *td, int events);
643 int vn_rdwr (enum uio_rw rw, struct vnode *vp, caddr_t base,
644 int len, off_t offset, enum uio_seg segflg, int ioflg,
645 struct ucred *cred, int *aresid, struct thread *td);
646 int vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, caddr_t base,
647 int len, off_t offset, enum uio_seg segflg, int ioflg,
648 struct ucred *cred, int *aresid, struct thread *td);
649 int vn_stat (struct vnode *vp, struct stat *sb, struct thread *td);
650 dev_t vn_todev (struct vnode *vp);
651 int vfs_object_create (struct vnode *vp, struct thread *td);
652 void vfs_timestamp (struct timespec *);
653 int vn_writechk (struct vnode *vp);
654 int vop_stdbwrite (struct vop_bwrite_args *ap);
655 int vop_stdislocked (struct vop_islocked_args *ap);
656 int vop_stdlock (struct vop_lock_args *ap);
657 int vop_stdrlock (struct vop_lock_args *ap);
658 int vop_stdunlock (struct vop_unlock_args *ap);
659 int vop_nopoll (struct vop_poll_args *ap);
660 int vop_stdpathconf (struct vop_pathconf_args *ap);
661 int vop_stdpoll (struct vop_poll_args *ap);
662 int vop_stdrevoke (struct vop_revoke_args *ap);
663 int vop_eopnotsupp (struct vop_generic_args *ap);
664 int vop_ebadf (struct vop_generic_args *ap);
665 int vop_einval (struct vop_generic_args *ap);
666 int vop_enotty (struct vop_generic_args *ap);
667 int vop_defaultop (struct vop_generic_args *ap);
668 int vop_null (struct vop_generic_args *ap);
669 int vop_panic (struct vop_generic_args *ap);
670 int vop_stdcreatevobject (struct vop_createvobject_args *ap);
671 int vop_stddestroyvobject (struct vop_destroyvobject_args *ap);
672 int vop_stdgetvobject (struct vop_getvobject_args *ap);
674 int vop_compat_nresolve(struct vop_nresolve_args *ap);
675 int vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
676 int vop_compat_ncreate(struct vop_ncreate_args *ap);
677 int vop_compat_nmkdir(struct vop_nmkdir_args *ap);
678 int vop_compat_nmknod(struct vop_nmknod_args *ap);
679 int vop_compat_nlink(struct vop_nlink_args *ap);
680 int vop_compat_nsymlink(struct vop_nsymlink_args *ap);
681 int vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
682 int vop_compat_nremove(struct vop_nremove_args *ap);
683 int vop_compat_nrmdir(struct vop_nrmdir_args *ap);
684 int vop_compat_nrename(struct vop_nrename_args *ap);
686 int vx_lock (struct vnode *vp);
687 void vx_unlock (struct vnode *vp);
688 int vx_get (struct vnode *vp);
689 int vx_get_nonblock (struct vnode *vp);
690 void vx_put (struct vnode *vp);
691 int vget (struct vnode *vp, int lockflag, struct thread *td);
692 void vput (struct vnode *vp);
693 void vhold (struct vnode *);
694 void vdrop (struct vnode *);
695 void vref (struct vnode *vp);
696 void vrele (struct vnode *vp);
697 void vsetflags (struct vnode *vp, int flags);
698 void vclrflags (struct vnode *vp, int flags);
700 void vfs_subr_init(void);
701 void vfs_mount_init(void);
702 void vfs_lock_init(void);
703 void vfs_sync_init(void);
705 void vn_syncer_add_to_worklist(struct vnode *, int);
706 void vnlru_proc_wait(void);
708 extern struct vop_ops *default_vnode_vops;
709 extern struct vop_ops *spec_vnode_vops;
710 extern struct vop_ops *dead_vnode_vops;
714 #endif /* !_SYS_VNODE_H_ */