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34 * @(#)vfs_vnops.c 8.2 (Berkeley) 1/21/94
35 * $FreeBSD: src/sys/kern/vfs_vnops.c,v 1.87.2.13 2002/12/29 18:19:53 dillon Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/fcntl.h>
46 #include <sys/mount.h>
47 #include <sys/nlookup.h>
48 #include <sys/vnode.h>
50 #include <sys/filio.h>
51 #include <sys/ttycom.h>
53 #include <sys/sysctl.h>
54 #include <sys/syslog.h>
56 #include <sys/mplock2.h>
58 static int vn_closefile (struct file *fp);
59 static int vn_ioctl (struct file *fp, u_long com, caddr_t data,
60 struct ucred *cred, struct sysmsg *msg);
61 static int vn_read (struct file *fp, struct uio *uio,
62 struct ucred *cred, int flags);
63 static int vn_kqfilter (struct file *fp, struct knote *kn);
64 static int vn_statfile (struct file *fp, struct stat *sb, struct ucred *cred);
65 static int vn_write (struct file *fp, struct uio *uio,
66 struct ucred *cred, int flags);
68 struct fileops vnode_fileops = {
72 .fo_kqfilter = vn_kqfilter,
73 .fo_stat = vn_statfile,
74 .fo_close = vn_closefile,
75 .fo_shutdown = nofo_shutdown
79 * Common code for vnode open operations. Check permissions, and call
80 * the VOP_NOPEN or VOP_NCREATE routine.
82 * The caller is responsible for setting up nd with nlookup_init() and
83 * for cleaning it up with nlookup_done(), whether we return an error
86 * On success nd->nl_open_vp will hold a referenced and, if requested,
87 * locked vnode. A locked vnode is requested via NLC_LOCKVP. If fp
88 * is non-NULL the vnode will be installed in the file pointer.
90 * NOTE: If the caller wishes the namecache entry to be operated with
91 * a shared lock it must use NLC_SHAREDLOCK. If NLC_LOCKVP is set
92 * then the vnode lock will also be shared.
94 * NOTE: The vnode is referenced just once on return whether or not it
95 * is also installed in the file pointer.
98 vn_open(struct nlookupdata *nd, struct file *fp, int fmode, int cmode)
101 struct ucred *cred = nd->nl_cred;
103 struct vattr *vap = &vat;
111 * Certain combinations are illegal
113 if ((fmode & (FWRITE | O_TRUNC)) == O_TRUNC)
117 * Lookup the path and create or obtain the vnode. After a
118 * successful lookup a locked nd->nl_nch will be returned.
120 * The result of this section should be a locked vnode.
122 * XXX with only a little work we should be able to avoid locking
123 * the vnode if FWRITE, O_CREAT, and O_TRUNC are *not* set.
125 nd->nl_flags |= NLC_OPEN;
126 if (fmode & O_APPEND)
127 nd->nl_flags |= NLC_APPEND;
129 nd->nl_flags |= NLC_TRUNCATE;
131 nd->nl_flags |= NLC_READ;
133 nd->nl_flags |= NLC_WRITE;
134 if ((fmode & O_EXCL) == 0 && (fmode & O_NOFOLLOW) == 0)
135 nd->nl_flags |= NLC_FOLLOW;
137 if (fmode & O_CREAT) {
139 * CONDITIONAL CREATE FILE CASE
141 * Setting NLC_CREATE causes a negative hit to store
142 * the negative hit ncp and not return an error. Then
143 * nc_error or nc_vp may be checked to see if the ncp
144 * represents a negative hit. NLC_CREATE also requires
145 * write permission on the governing directory or EPERM
147 * If the file exists but is missing write permission,
148 * nlookup() returns EACCES. This has to be handled specially
149 * when combined with O_EXCL.
151 nd->nl_flags |= NLC_CREATE;
152 nd->nl_flags |= NLC_REFDVP;
155 if (error == EACCES && nd->nl_nch.ncp->nc_vp != NULL &&
160 * NORMAL OPEN FILE CASE
169 * split case to allow us to re-resolve and retry the ncp in case
172 * (error is 0 on entry / retry)
176 * Checks for (likely) filesystem-modifying cases and allows
177 * the filesystem to stall the front-end.
179 if ((fmode & (FWRITE | O_TRUNC)) ||
180 ((fmode & O_CREAT) && nd->nl_nch.ncp->nc_vp == NULL)) {
181 error = ncp_writechk(&nd->nl_nch);
187 if (fmode & O_CREAT) {
188 if (nd->nl_nch.ncp->nc_vp == NULL) {
191 vap->va_mode = cmode;
192 vap->va_fuseflags = fmode; /* FUSE */
194 vap->va_vaflags |= VA_EXCLUSIVE;
195 error = VOP_NCREATE(&nd->nl_nch, nd->nl_dvp, &vp,
200 /* locked vnode is returned */
202 if (fmode & O_EXCL) {
205 error = cache_vget(&nd->nl_nch, cred,
214 * In most other cases a shared lock on the vnode is
215 * sufficient. However, the O_RDWR case needs an
216 * exclusive lock if the vnode is executable. The
217 * NLC_EXCLLOCK_IFEXEC and NCF_NOTX flags help resolve
220 * NOTE: If NCF_NOTX is not set, we do not know the
221 * the state of the 'x' bits and have to get
222 * an exclusive lock for the EXCLLOCK_IFEXEC case.
224 if ((nd->nl_flags & NLC_SHAREDLOCK) &&
225 ((nd->nl_flags & NLC_EXCLLOCK_IFEXEC) == 0 ||
226 nd->nl_nch.ncp->nc_flag & NCF_NOTX)) {
227 error = cache_vget(&nd->nl_nch, cred, LK_SHARED, &vp);
230 error = cache_vget(&nd->nl_nch, cred,
238 * We have a locked vnode and ncp now. Note that the ncp will
239 * be cleaned up by the caller if nd->nl_nch is left intact.
241 if (vp->v_type == VLNK) {
245 if (vp->v_type == VSOCK) {
249 if (vp->v_type != VDIR && (fmode & O_DIRECTORY)) {
253 if ((fmode & O_CREAT) == 0) {
254 if (fmode & (FWRITE | O_TRUNC)) {
255 if (vp->v_type == VDIR) {
261 * Additional checks on vnode (does not substitute
262 * for ncp_writechk()).
264 error = vn_writechk(vp);
267 * Special stale handling, re-resolve the
270 if (error == ESTALE) {
274 cache_unlock(&nd->nl_nch);
275 cache_lock(&nd->nl_nch);
277 cache_setunresolved(&nd->nl_nch);
278 error = cache_resolve(&nd->nl_nch,
287 if (fmode & O_TRUNC) {
288 vn_unlock(vp); /* XXX */
289 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* XXX */
290 osize = vp->v_filesize;
293 error = VOP_SETATTR_FP(vp, vap, cred, fp);
296 error = VOP_GETATTR(vp, vap);
300 VFS_ACCOUNT(mp, vap->va_uid, vap->va_gid, -osize);
304 * Set or clear VNSWAPCACHE on the vp based on nd->nl_nch.ncp->nc_flag.
305 * These particular bits a tracked all the way from the root.
307 * NOTE: Might not work properly on NFS servers due to the
308 * disconnected namecache.
310 flags = nd->nl_nch.ncp->nc_flag;
311 if ((flags & (NCF_UF_CACHE | NCF_UF_PCACHE)) &&
312 (flags & (NCF_SF_NOCACHE | NCF_SF_PNOCACHE)) == 0) {
313 vsetflags(vp, VSWAPCACHE);
315 vclrflags(vp, VSWAPCACHE);
319 * Setup the fp so VOP_OPEN can override it. No descriptor has been
320 * associated with the fp yet so we own it clean.
322 * f_nchandle inherits nl_nch. This used to be necessary only for
323 * directories but now we do it unconditionally so f*() ops
324 * such as fchmod() can access the actual namespace that was
325 * used to open the file.
328 if (nd->nl_flags & NLC_APPENDONLY)
329 fmode |= FAPPENDONLY;
330 fp->f_nchandle = nd->nl_nch;
331 cache_zero(&nd->nl_nch);
332 cache_unlock(&fp->f_nchandle);
336 * Get rid of nl_nch. vn_open does not return it (it returns the
337 * vnode or the file pointer). Note: we can't leave nl_nch locked
338 * through the VOP_OPEN anyway since the VOP_OPEN may block, e.g.
342 cache_put(&nd->nl_nch);
344 error = VOP_OPEN(vp, fmode, cred, fp);
347 * setting f_ops to &badfileops will prevent the descriptor
348 * code from trying to close and release the vnode, since
349 * the open failed we do not want to call close.
353 fp->f_ops = &badfileops;
360 * Assert that VREG files have been setup for vmio.
362 KASSERT(vp->v_type != VREG || vp->v_object != NULL,
363 ("vn_open: regular file was not VMIO enabled!"));
367 * Return the vnode. XXX needs some cleaning up. The vnode is
368 * only returned in the fp == NULL case.
372 nd->nl_vp_fmode = fmode;
373 if ((nd->nl_flags & NLC_LOCKVP) == 0)
386 vn_opendisk(const char *devname, int fmode, struct vnode **vpp)
391 if (strncmp(devname, "/dev/", 5) == 0)
393 if ((vp = getsynthvnode(devname)) == NULL) {
396 error = VOP_OPEN(vp, fmode, proc0.p_ucred, NULL);
408 * Checks for special conditions on the vnode which might prevent writing
409 * after the vnode has (likely) been locked. The vnode might or might not
410 * be locked as of this call, but will be at least referenced.
412 * Also re-checks the mount RDONLY flag that ncp_writechk() checked prior
413 * to the vnode being locked.
416 vn_writechk(struct vnode *vp)
419 * If there's shared text associated with
420 * the vnode, try to free it up once. If
421 * we fail, we can't allow writing.
423 if (vp->v_flag & VTEXT)
425 if (vp->v_mount && (vp->v_mount->mnt_flag & MNT_RDONLY))
431 * Check whether the underlying mount is read-only. The mount point
432 * referenced by the namecache may be different from the mount point
433 * used by the underlying vnode in the case of NULLFS, so a separate
436 * Must be called PRIOR to any vnodes being locked.
439 ncp_writechk(struct nchandle *nch)
443 if ((mp = nch->mount) != NULL) {
444 if (mp->mnt_flag & MNT_RDONLY)
446 if (mp->mnt_op->vfs_modifying != vfs_stdmodifying)
458 vn_close(struct vnode *vp, int flags, struct file *fp)
462 error = vn_lock(vp, LK_SHARED | LK_RETRY | LK_FAILRECLAIM);
464 error = VOP_CLOSE(vp, flags, fp);
472 * Sequential heuristic.
474 * MPSAFE (f_seqcount and f_nextoff are allowed to race)
478 sequential_heuristic(struct uio *uio, struct file *fp)
481 * Sequential heuristic - detect sequential operation
483 * NOTE: SMP: We allow f_seqcount updates to race.
485 if ((uio->uio_offset == 0 && fp->f_seqcount > 0) ||
486 uio->uio_offset == fp->f_nextoff) {
487 int tmpseq = fp->f_seqcount;
489 tmpseq += (uio->uio_resid + MAXBSIZE - 1) / MAXBSIZE;
490 if (tmpseq > IO_SEQMAX)
492 fp->f_seqcount = tmpseq;
493 return(fp->f_seqcount << IO_SEQSHIFT);
497 * Not sequential, quick draw-down of seqcount
499 * NOTE: SMP: We allow f_seqcount updates to race.
501 if (fp->f_seqcount > 1)
509 * get - lock and return the f_offset field.
510 * set - set and unlock the f_offset field.
512 * These routines serve the dual purpose of serializing access to the
513 * f_offset field (at least on x86) and guaranteeing operational integrity
514 * when multiple read()ers and write()ers are present on the same fp.
518 static __inline off_t
519 vn_get_fpf_offset(struct file *fp)
525 * Shortcut critical path.
527 flags = fp->f_flag & ~FOFFSETLOCK;
528 if (atomic_cmpset_int(&fp->f_flag, flags, flags | FOFFSETLOCK))
529 return(fp->f_offset);
536 if (flags & FOFFSETLOCK) {
537 nflags = flags | FOFFSETWAKE;
538 tsleep_interlock(&fp->f_flag, 0);
539 if (atomic_cmpset_int(&fp->f_flag, flags, nflags))
540 tsleep(&fp->f_flag, PINTERLOCKED, "fpoff", 0);
542 nflags = flags | FOFFSETLOCK;
543 if (atomic_cmpset_int(&fp->f_flag, flags, nflags))
547 return(fp->f_offset);
554 vn_set_fpf_offset(struct file *fp, off_t offset)
560 * We hold the lock so we can set the offset without interference.
562 fp->f_offset = offset;
565 * Normal release is already a reasonably critical path.
569 nflags = flags & ~(FOFFSETLOCK | FOFFSETWAKE);
570 if (atomic_cmpset_int(&fp->f_flag, flags, nflags)) {
571 if (flags & FOFFSETWAKE)
581 static __inline off_t
582 vn_poll_fpf_offset(struct file *fp)
584 #if defined(__x86_64__)
585 return(fp->f_offset);
587 off_t off = vn_get_fpf_offset(fp);
588 vn_set_fpf_offset(fp, off);
594 * Package up an I/O request on a vnode into a uio and do it.
599 vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base, int len,
600 off_t offset, enum uio_seg segflg, int ioflg,
601 struct ucred *cred, int *aresid)
607 if ((ioflg & IO_NODELOCKED) == 0)
608 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
609 auio.uio_iov = &aiov;
611 aiov.iov_base = base;
613 auio.uio_resid = len;
614 auio.uio_offset = offset;
615 auio.uio_segflg = segflg;
617 auio.uio_td = curthread;
618 if (rw == UIO_READ) {
619 error = VOP_READ(vp, &auio, ioflg, cred);
621 error = VOP_WRITE(vp, &auio, ioflg, cred);
624 *aresid = auio.uio_resid;
626 if (auio.uio_resid && error == 0)
628 if ((ioflg & IO_NODELOCKED) == 0)
634 * Package up an I/O request on a vnode into a uio and do it. The I/O
635 * request is split up into smaller chunks and we try to avoid saturating
636 * the buffer cache while potentially holding a vnode locked, so we
637 * check bwillwrite() before calling vn_rdwr(). We also call lwkt_user_yield()
638 * to give other processes a chance to lock the vnode (either other processes
639 * core'ing the same binary, or unrelated processes scanning the directory).
644 vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base, int len,
645 off_t offset, enum uio_seg segflg, int ioflg,
646 struct ucred *cred, int *aresid)
654 * Force `offset' to a multiple of MAXBSIZE except possibly
655 * for the first chunk, so that filesystems only need to
656 * write full blocks except possibly for the first and last
659 chunk = MAXBSIZE - (uoff_t)offset % MAXBSIZE;
663 if (vp->v_type == VREG && (ioflg & IO_RECURSE) == 0) {
673 error = vn_rdwr(rw, vp, base, chunk, offset, segflg,
674 ioflg, cred, aresid);
675 len -= chunk; /* aresid calc already includes length */
688 * File pointers can no longer get ripped up by revoke so
689 * we don't need to lock access to the vp.
691 * f_offset updates are not guaranteed against multiple readers
694 vn_read(struct file *fp, struct uio *uio, struct ucred *cred, int flags)
699 KASSERT(uio->uio_td == curthread,
700 ("uio_td %p is not td %p", uio->uio_td, curthread));
701 vp = (struct vnode *)fp->f_data;
704 if (flags & O_FBLOCKING) {
705 /* ioflag &= ~IO_NDELAY; */
706 } else if (flags & O_FNONBLOCKING) {
708 } else if (fp->f_flag & FNONBLOCK) {
711 if (fp->f_flag & O_DIRECT) {
714 if ((flags & O_FOFFSET) == 0 && (vp->v_flag & VNOTSEEKABLE) == 0)
715 uio->uio_offset = vn_get_fpf_offset(fp);
716 vn_lock(vp, LK_SHARED | LK_RETRY);
717 ioflag |= sequential_heuristic(uio, fp);
719 error = VOP_READ_FP(vp, uio, ioflag, cred, fp);
720 fp->f_nextoff = uio->uio_offset;
722 if ((flags & O_FOFFSET) == 0 && (vp->v_flag & VNOTSEEKABLE) == 0)
723 vn_set_fpf_offset(fp, uio->uio_offset);
731 vn_write(struct file *fp, struct uio *uio, struct ucred *cred, int flags)
736 KASSERT(uio->uio_td == curthread,
737 ("uio_td %p is not p %p", uio->uio_td, curthread));
738 vp = (struct vnode *)fp->f_data;
741 if (vp->v_type == VREG &&
742 ((fp->f_flag & O_APPEND) || (flags & O_FAPPEND))) {
746 if (flags & O_FBLOCKING) {
747 /* ioflag &= ~IO_NDELAY; */
748 } else if (flags & O_FNONBLOCKING) {
750 } else if (fp->f_flag & FNONBLOCK) {
753 if (fp->f_flag & O_DIRECT) {
756 if (flags & O_FASYNCWRITE) {
757 /* ioflag &= ~IO_SYNC; */
758 } else if (flags & O_FSYNCWRITE) {
760 } else if (fp->f_flag & O_FSYNC) {
764 if (vp->v_mount && (vp->v_mount->mnt_flag & MNT_SYNCHRONOUS))
766 if ((flags & O_FOFFSET) == 0)
767 uio->uio_offset = vn_get_fpf_offset(fp);
769 VFS_MODIFYING(vp->v_mount);
770 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
771 ioflag |= sequential_heuristic(uio, fp);
772 error = VOP_WRITE_FP(vp, uio, ioflag, cred, fp);
773 fp->f_nextoff = uio->uio_offset;
775 if ((flags & O_FOFFSET) == 0)
776 vn_set_fpf_offset(fp, uio->uio_offset);
784 vn_statfile(struct file *fp, struct stat *sb, struct ucred *cred)
789 vp = (struct vnode *)fp->f_data;
790 error = vn_stat(vp, sb, cred);
798 vn_stat(struct vnode *vp, struct stat *sb, struct ucred *cred)
807 * vp already has a ref and is validated, can call unlocked.
810 error = VOP_GETATTR(vp, vap);
815 * Zero the spare stat fields
821 * Copy from vattr table
823 if (vap->va_fsid != VNOVAL)
824 sb->st_dev = vap->va_fsid;
826 sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0];
827 sb->st_ino = vap->va_fileid;
829 switch (vap->va_type) {
847 /* This is a cosmetic change, symlinks do not have a mode. */
848 if (vp->v_mount->mnt_flag & MNT_NOSYMFOLLOW)
849 sb->st_mode &= ~ACCESSPERMS; /* 0000 */
851 sb->st_mode |= ACCESSPERMS; /* 0777 */
863 if (vap->va_nlink > (nlink_t)-1)
864 sb->st_nlink = (nlink_t)-1;
866 sb->st_nlink = vap->va_nlink;
867 sb->st_uid = vap->va_uid;
868 sb->st_gid = vap->va_gid;
869 sb->st_rdev = devid_from_dev(vp->v_rdev);
870 sb->st_size = vap->va_size;
871 sb->st_atimespec = vap->va_atime;
872 sb->st_mtimespec = vap->va_mtime;
873 sb->st_ctimespec = vap->va_ctime;
876 * A VCHR and VBLK device may track the last access and last modified
877 * time independantly of the filesystem. This is particularly true
878 * because device read and write calls may bypass the filesystem.
880 if (vp->v_type == VCHR || vp->v_type == VBLK) {
883 if (dev->si_lastread) {
884 sb->st_atimespec.tv_sec = time_second +
887 sb->st_atimespec.tv_nsec = 0;
889 if (dev->si_lastwrite) {
890 sb->st_atimespec.tv_sec = time_second +
893 sb->st_atimespec.tv_nsec = 0;
899 * According to www.opengroup.org, the meaning of st_blksize is
900 * "a filesystem-specific preferred I/O block size for this
901 * object. In some filesystem types, this may vary from file
903 * Default to PAGE_SIZE after much discussion.
906 if (vap->va_type == VREG) {
907 sb->st_blksize = vap->va_blocksize;
908 } else if (vn_isdisk(vp, NULL)) {
910 * XXX this is broken. If the device is not yet open (aka
911 * stat() call, aka v_rdev == NULL), how are we supposed
912 * to get a valid block size out of it?
916 sb->st_blksize = dev->si_bsize_best;
917 if (sb->st_blksize < dev->si_bsize_phys)
918 sb->st_blksize = dev->si_bsize_phys;
919 if (sb->st_blksize < BLKDEV_IOSIZE)
920 sb->st_blksize = BLKDEV_IOSIZE;
922 sb->st_blksize = PAGE_SIZE;
925 sb->st_flags = vap->va_flags;
927 error = priv_check_cred(cred, PRIV_VFS_GENERATION, 0);
931 sb->st_gen = (u_int32_t)vap->va_gen;
933 sb->st_blocks = vap->va_bytes / S_BLKSIZE;
936 * This is for ABI compatibility <= 5.7 (for ABI change made in
939 sb->__old_st_blksize = sb->st_blksize;
945 * MPALMOSTSAFE - acquires mplock
948 vn_ioctl(struct file *fp, u_long com, caddr_t data, struct ucred *ucred,
951 struct vnode *vp = ((struct vnode *)fp->f_data);
957 switch (vp->v_type) {
960 if (com == FIONREAD) {
961 error = VOP_GETATTR(vp, &vattr);
964 size = vattr.va_size;
965 if ((vp->v_flag & VNOTSEEKABLE) == 0)
966 size -= vn_poll_fpf_offset(fp);
967 if (size > 0x7FFFFFFF)
973 if (com == FIOASYNC) { /* XXX */
985 if (com == FIODTYPE) {
986 if (vp->v_type != VCHR && vp->v_type != VBLK) {
990 *(int *)data = dev_dflags(vp->v_rdev) & D_TYPEMASK;
994 error = VOP_IOCTL(vp, com, data, fp->f_flag, ucred, msg);
995 if (error == 0 && com == TIOCSCTTY) {
996 struct proc *p = curthread->td_proc;
997 struct session *sess;
1005 sess = p->p_session;
1006 /* Do nothing if reassigning same control tty */
1007 if (sess->s_ttyvp == vp) {
1013 /* Get rid of reference to old control tty */
1014 ovp = sess->s_ttyvp;
1027 * Obtain the requested vnode lock
1029 * LK_RETRY Automatically retry on timeout
1030 * LK_FAILRECLAIM Fail if the vnode is being reclaimed
1032 * Failures will occur if the vnode is undergoing recyclement, but not
1033 * all callers expect that the function will fail so the caller must pass
1034 * LK_FAILOK if it wants to process an error code.
1036 * Errors can occur for other reasons if you pass in other LK_ flags,
1037 * regardless of whether you pass in LK_FAILRECLAIM
1040 vn_lock(struct vnode *vp, int flags)
1045 error = lockmgr(&vp->v_lock, flags);
1048 } while (flags & LK_RETRY);
1051 * Because we (had better!) have a ref on the vnode, once it
1052 * goes to VRECLAIMED state it will not be recycled until all
1053 * refs go away. So we can just check the flag.
1055 if (error == 0 && (vp->v_flag & VRECLAIMED)) {
1056 if (flags & LK_FAILRECLAIM) {
1057 lockmgr(&vp->v_lock, LK_RELEASE);
1065 vn_relock(struct vnode *vp, int flags)
1070 error = lockmgr(&vp->v_lock, flags);
1073 } while (flags & LK_RETRY);
1078 #ifdef DEBUG_VN_UNLOCK
1081 debug_vn_unlock(struct vnode *vp, const char *filename, int line)
1083 kprintf("vn_unlock from %s:%d\n", filename, line);
1084 lockmgr(&vp->v_lock, LK_RELEASE);
1090 vn_unlock(struct vnode *vp)
1092 lockmgr(&vp->v_lock, LK_RELEASE);
1101 vn_islocked(struct vnode *vp)
1103 return (lockstatus(&vp->v_lock, curthread));
1107 * Return the lock status of a vnode and unlock the vnode
1108 * if we owned the lock. This is not a boolean, if the
1109 * caller cares what the lock status is the caller must
1110 * check the various possible values.
1112 * This only unlocks exclusive locks held by the caller,
1113 * it will NOT unlock shared locks (there is no way to
1114 * tell who the shared lock belongs to).
1119 vn_islocked_unlock(struct vnode *vp)
1123 vpls = lockstatus(&vp->v_lock, curthread);
1124 if (vpls == LK_EXCLUSIVE)
1125 lockmgr(&vp->v_lock, LK_RELEASE);
1130 * Restore a vnode lock that we previously released via
1131 * vn_islocked_unlock(). This is a NOP if we did not
1132 * own the original lock.
1137 vn_islocked_relock(struct vnode *vp, int vpls)
1141 if (vpls == LK_EXCLUSIVE)
1142 error = lockmgr(&vp->v_lock, vpls);
1149 vn_closefile(struct file *fp)
1153 fp->f_ops = &badfileops;
1154 error = vn_close(((struct vnode *)fp->f_data), fp->f_flag, fp);
1162 vn_kqfilter(struct file *fp, struct knote *kn)
1166 error = VOP_KQFILTER(((struct vnode *)fp->f_data), kn);