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31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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>
40 #include <sys/fcntl.h>
45 #include <sys/mount.h>
46 #include <sys/nlookup.h>
47 #include <sys/vnode.h>
49 #include <sys/filio.h>
50 #include <sys/ttycom.h>
52 #include <sys/sysctl.h>
53 #include <sys/syslog.h>
55 #include <sys/thread2.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: The vnode is referenced just once on return whether or not it
91 * is also installed in the file pointer.
94 vn_open(struct nlookupdata
*nd
, struct file
*fp
, int fmode
, int cmode
)
97 struct ucred
*cred
= nd
->nl_cred
;
99 struct vattr
*vap
= &vat
;
106 * Certain combinations are illegal
108 if ((fmode
& (FWRITE
| O_TRUNC
)) == O_TRUNC
)
112 * Lookup the path and create or obtain the vnode. After a
113 * successful lookup a locked nd->nl_nch will be returned.
115 * The result of this section should be a locked vnode.
117 * XXX with only a little work we should be able to avoid locking
118 * the vnode if FWRITE, O_CREAT, and O_TRUNC are *not* set.
120 nd
->nl_flags
|= NLC_OPEN
;
121 if (fmode
& O_APPEND
)
122 nd
->nl_flags
|= NLC_APPEND
;
124 nd
->nl_flags
|= NLC_TRUNCATE
;
126 nd
->nl_flags
|= NLC_READ
;
128 nd
->nl_flags
|= NLC_WRITE
;
129 if ((fmode
& O_EXCL
) == 0 && (fmode
& O_NOFOLLOW
) == 0)
130 nd
->nl_flags
|= NLC_FOLLOW
;
132 if (fmode
& O_CREAT
) {
134 * CONDITIONAL CREATE FILE CASE
136 * Setting NLC_CREATE causes a negative hit to store
137 * the negative hit ncp and not return an error. Then
138 * nc_error or nc_vp may be checked to see if the ncp
139 * represents a negative hit. NLC_CREATE also requires
140 * write permission on the governing directory or EPERM
143 nd
->nl_flags
|= NLC_CREATE
;
144 nd
->nl_flags
|= NLC_REFDVP
;
149 * NORMAL OPEN FILE CASE
158 * split case to allow us to re-resolve and retry the ncp in case
162 if (fmode
& O_CREAT
) {
163 if (nd
->nl_nch
.ncp
->nc_vp
== NULL
) {
164 if ((error
= ncp_writechk(&nd
->nl_nch
)) != 0)
168 vap
->va_mode
= cmode
;
170 vap
->va_vaflags
|= VA_EXCLUSIVE
;
171 error
= VOP_NCREATE(&nd
->nl_nch
, nd
->nl_dvp
, &vp
,
176 /* locked vnode is returned */
178 if (fmode
& O_EXCL
) {
181 error
= cache_vget(&nd
->nl_nch
, cred
,
189 error
= cache_vget(&nd
->nl_nch
, cred
, LK_EXCLUSIVE
, &vp
);
195 * We have a locked vnode and ncp now. Note that the ncp will
196 * be cleaned up by the caller if nd->nl_nch is left intact.
198 if (vp
->v_type
== VLNK
) {
202 if (vp
->v_type
== VSOCK
) {
206 if (vp
->v_type
!= VDIR
&& (fmode
& O_DIRECTORY
)) {
210 if ((fmode
& O_CREAT
) == 0) {
211 if (fmode
& (FWRITE
| O_TRUNC
)) {
212 if (vp
->v_type
== VDIR
) {
216 error
= vn_writechk(vp
, &nd
->nl_nch
);
219 * Special stale handling, re-resolve the
222 if (error
== ESTALE
) {
225 cache_setunresolved(&nd
->nl_nch
);
226 error
= cache_resolve(&nd
->nl_nch
, cred
);
234 if (fmode
& O_TRUNC
) {
235 vn_unlock(vp
); /* XXX */
236 vn_lock(vp
, LK_EXCLUSIVE
| LK_RETRY
); /* XXX */
237 osize
= vp
->v_filesize
;
240 error
= VOP_SETATTR(vp
, vap
, cred
);
243 error
= VOP_GETATTR(vp
, vap
);
247 VFS_ACCOUNT(mp
, vap
->va_uid
, vap
->va_gid
, -osize
);
251 * Set or clear VNSWAPCACHE on the vp based on nd->nl_nch.ncp->nc_flag.
252 * These particular bits a tracked all the way from the root.
254 * NOTE: Might not work properly on NFS servers due to the
255 * disconnected namecache.
257 flags
= nd
->nl_nch
.ncp
->nc_flag
;
258 if ((flags
& (NCF_UF_CACHE
| NCF_UF_PCACHE
)) &&
259 (flags
& (NCF_SF_NOCACHE
| NCF_SF_PNOCACHE
)) == 0) {
260 vsetflags(vp
, VSWAPCACHE
);
262 vclrflags(vp
, VSWAPCACHE
);
266 * Setup the fp so VOP_OPEN can override it. No descriptor has been
267 * associated with the fp yet so we own it clean.
269 * f_nchandle inherits nl_nch. This used to be necessary only for
270 * directories but now we do it unconditionally so f*() ops
271 * such as fchmod() can access the actual namespace that was
272 * used to open the file.
275 if (nd
->nl_flags
& NLC_APPENDONLY
)
276 fmode
|= FAPPENDONLY
;
277 fp
->f_nchandle
= nd
->nl_nch
;
278 cache_zero(&nd
->nl_nch
);
279 cache_unlock(&fp
->f_nchandle
);
283 * Get rid of nl_nch. vn_open does not return it (it returns the
284 * vnode or the file pointer). Note: we can't leave nl_nch locked
285 * through the VOP_OPEN anyway since the VOP_OPEN may block, e.g.
289 cache_put(&nd
->nl_nch
);
291 error
= VOP_OPEN(vp
, fmode
, cred
, fp
);
294 * setting f_ops to &badfileops will prevent the descriptor
295 * code from trying to close and release the vnode, since
296 * the open failed we do not want to call close.
300 fp
->f_ops
= &badfileops
;
307 * Assert that VREG files have been setup for vmio.
309 KASSERT(vp
->v_type
!= VREG
|| vp
->v_object
!= NULL
,
310 ("vn_open: regular file was not VMIO enabled!"));
314 * Return the vnode. XXX needs some cleaning up. The vnode is
315 * only returned in the fp == NULL case.
319 nd
->nl_vp_fmode
= fmode
;
320 if ((nd
->nl_flags
& NLC_LOCKVP
) == 0)
333 vn_opendisk(const char *devname
, int fmode
, struct vnode
**vpp
)
338 if (strncmp(devname
, "/dev/", 5) == 0)
340 if ((vp
= getsynthvnode(devname
)) == NULL
) {
343 error
= VOP_OPEN(vp
, fmode
, proc0
.p_ucred
, NULL
);
355 * Check for write permissions on the specified vnode. nch may be NULL.
358 vn_writechk(struct vnode
*vp
, struct nchandle
*nch
)
361 * If there's shared text associated with
362 * the vnode, try to free it up once. If
363 * we fail, we can't allow writing.
365 if (vp
->v_flag
& VTEXT
)
369 * If the vnode represents a regular file, check the mount
370 * point via the nch. This may be a different mount point
371 * then the one embedded in the vnode (e.g. nullfs).
373 * We can still write to non-regular files (e.g. devices)
374 * via read-only mounts.
376 if (nch
&& nch
->ncp
&& vp
->v_type
== VREG
)
377 return (ncp_writechk(nch
));
382 * Check whether the underlying mount is read-only. The mount point
383 * referenced by the namecache may be different from the mount point
384 * used by the underlying vnode in the case of NULLFS, so a separate
388 ncp_writechk(struct nchandle
*nch
)
390 if (nch
->mount
&& (nch
->mount
->mnt_flag
& MNT_RDONLY
))
401 vn_close(struct vnode
*vp
, int flags
)
405 error
= vn_lock(vp
, LK_EXCLUSIVE
| LK_RETRY
);
407 error
= VOP_CLOSE(vp
, flags
);
415 * Sequential heuristic.
417 * MPSAFE (f_seqcount and f_nextoff are allowed to race)
421 sequential_heuristic(struct uio
*uio
, struct file
*fp
)
424 * Sequential heuristic - detect sequential operation
426 * NOTE: SMP: We allow f_seqcount updates to race.
428 if ((uio
->uio_offset
== 0 && fp
->f_seqcount
> 0) ||
429 uio
->uio_offset
== fp
->f_nextoff
) {
430 int tmpseq
= fp
->f_seqcount
;
432 tmpseq
+= (uio
->uio_resid
+ BKVASIZE
- 1) / BKVASIZE
;
433 if (tmpseq
> IO_SEQMAX
)
435 fp
->f_seqcount
= tmpseq
;
436 return(fp
->f_seqcount
<< IO_SEQSHIFT
);
440 * Not sequential, quick draw-down of seqcount
442 * NOTE: SMP: We allow f_seqcount updates to race.
444 if (fp
->f_seqcount
> 1)
452 * get - lock and return the f_offset field.
453 * set - set and unlock the f_offset field.
455 * These routines serve the dual purpose of serializing access to the
456 * f_offset field (at least on i386) and guaranteeing operational integrity
457 * when multiple read()ers and write()ers are present on the same fp.
461 static __inline off_t
462 vn_get_fpf_offset(struct file
*fp
)
468 * Shortcut critical path.
470 flags
= fp
->f_flag
& ~FOFFSETLOCK
;
471 if (atomic_cmpset_int(&fp
->f_flag
, flags
, flags
| FOFFSETLOCK
))
472 return(fp
->f_offset
);
479 if (flags
& FOFFSETLOCK
) {
480 nflags
= flags
| FOFFSETWAKE
;
481 tsleep_interlock(&fp
->f_flag
, 0);
482 if (atomic_cmpset_int(&fp
->f_flag
, flags
, nflags
))
483 tsleep(&fp
->f_flag
, PINTERLOCKED
, "fpoff", 0);
485 nflags
= flags
| FOFFSETLOCK
;
486 if (atomic_cmpset_int(&fp
->f_flag
, flags
, nflags
))
490 return(fp
->f_offset
);
497 vn_set_fpf_offset(struct file
*fp
, off_t offset
)
503 * We hold the lock so we can set the offset without interference.
505 fp
->f_offset
= offset
;
508 * Normal release is already a reasonably critical path.
512 nflags
= flags
& ~(FOFFSETLOCK
| FOFFSETWAKE
);
513 if (atomic_cmpset_int(&fp
->f_flag
, flags
, nflags
)) {
514 if (flags
& FOFFSETWAKE
)
524 static __inline off_t
525 vn_poll_fpf_offset(struct file
*fp
)
527 #if defined(__x86_64__)
528 return(fp
->f_offset
);
530 off_t off
= vn_get_fpf_offset(fp
);
531 vn_set_fpf_offset(fp
, off
);
537 * Package up an I/O request on a vnode into a uio and do it.
542 vn_rdwr(enum uio_rw rw
, struct vnode
*vp
, caddr_t base
, int len
,
543 off_t offset
, enum uio_seg segflg
, int ioflg
,
544 struct ucred
*cred
, int *aresid
)
550 if ((ioflg
& IO_NODELOCKED
) == 0)
551 vn_lock(vp
, LK_EXCLUSIVE
| LK_RETRY
);
552 auio
.uio_iov
= &aiov
;
554 aiov
.iov_base
= base
;
556 auio
.uio_resid
= len
;
557 auio
.uio_offset
= offset
;
558 auio
.uio_segflg
= segflg
;
560 auio
.uio_td
= curthread
;
561 if (rw
== UIO_READ
) {
562 error
= VOP_READ(vp
, &auio
, ioflg
, cred
);
564 error
= VOP_WRITE(vp
, &auio
, ioflg
, cred
);
567 *aresid
= auio
.uio_resid
;
569 if (auio
.uio_resid
&& error
== 0)
571 if ((ioflg
& IO_NODELOCKED
) == 0)
577 * Package up an I/O request on a vnode into a uio and do it. The I/O
578 * request is split up into smaller chunks and we try to avoid saturating
579 * the buffer cache while potentially holding a vnode locked, so we
580 * check bwillwrite() before calling vn_rdwr(). We also call lwkt_user_yield()
581 * to give other processes a chance to lock the vnode (either other processes
582 * core'ing the same binary, or unrelated processes scanning the directory).
587 vn_rdwr_inchunks(enum uio_rw rw
, struct vnode
*vp
, caddr_t base
, int len
,
588 off_t offset
, enum uio_seg segflg
, int ioflg
,
589 struct ucred
*cred
, int *aresid
)
597 * Force `offset' to a multiple of MAXBSIZE except possibly
598 * for the first chunk, so that filesystems only need to
599 * write full blocks except possibly for the first and last
602 chunk
= MAXBSIZE
- (uoff_t
)offset
% MAXBSIZE
;
606 if (vp
->v_type
== VREG
) {
616 error
= vn_rdwr(rw
, vp
, base
, chunk
, offset
, segflg
,
617 ioflg
, cred
, aresid
);
618 len
-= chunk
; /* aresid calc already includes length */
631 * File pointers can no longer get ripped up by revoke so
632 * we don't need to lock access to the vp.
634 * f_offset updates are not guaranteed against multiple readers
637 vn_read(struct file
*fp
, struct uio
*uio
, struct ucred
*cred
, int flags
)
642 KASSERT(uio
->uio_td
== curthread
,
643 ("uio_td %p is not td %p", uio
->uio_td
, curthread
));
644 vp
= (struct vnode
*)fp
->f_data
;
647 if (flags
& O_FBLOCKING
) {
648 /* ioflag &= ~IO_NDELAY; */
649 } else if (flags
& O_FNONBLOCKING
) {
651 } else if (fp
->f_flag
& FNONBLOCK
) {
654 if (flags
& O_FBUFFERED
) {
655 /* ioflag &= ~IO_DIRECT; */
656 } else if (flags
& O_FUNBUFFERED
) {
658 } else if (fp
->f_flag
& O_DIRECT
) {
661 if ((flags
& O_FOFFSET
) == 0 && (vp
->v_flag
& VNOTSEEKABLE
) == 0)
662 uio
->uio_offset
= vn_get_fpf_offset(fp
);
663 vn_lock(vp
, LK_SHARED
| LK_RETRY
);
664 ioflag
|= sequential_heuristic(uio
, fp
);
666 error
= VOP_READ(vp
, uio
, ioflag
, cred
);
667 fp
->f_nextoff
= uio
->uio_offset
;
669 if ((flags
& O_FOFFSET
) == 0 && (vp
->v_flag
& VNOTSEEKABLE
) == 0)
670 vn_set_fpf_offset(fp
, uio
->uio_offset
);
678 vn_write(struct file
*fp
, struct uio
*uio
, struct ucred
*cred
, int flags
)
683 KASSERT(uio
->uio_td
== curthread
,
684 ("uio_td %p is not p %p", uio
->uio_td
, curthread
));
685 vp
= (struct vnode
*)fp
->f_data
;
688 if (vp
->v_type
== VREG
&&
689 ((fp
->f_flag
& O_APPEND
) || (flags
& O_FAPPEND
))) {
693 if (flags
& O_FBLOCKING
) {
694 /* ioflag &= ~IO_NDELAY; */
695 } else if (flags
& O_FNONBLOCKING
) {
697 } else if (fp
->f_flag
& FNONBLOCK
) {
700 if (flags
& O_FBUFFERED
) {
701 /* ioflag &= ~IO_DIRECT; */
702 } else if (flags
& O_FUNBUFFERED
) {
704 } else if (fp
->f_flag
& O_DIRECT
) {
707 if (flags
& O_FASYNCWRITE
) {
708 /* ioflag &= ~IO_SYNC; */
709 } else if (flags
& O_FSYNCWRITE
) {
711 } else if (fp
->f_flag
& O_FSYNC
) {
715 if (vp
->v_mount
&& (vp
->v_mount
->mnt_flag
& MNT_SYNCHRONOUS
))
717 if ((flags
& O_FOFFSET
) == 0)
718 uio
->uio_offset
= vn_get_fpf_offset(fp
);
719 vn_lock(vp
, LK_EXCLUSIVE
| LK_RETRY
);
720 ioflag
|= sequential_heuristic(uio
, fp
);
721 error
= VOP_WRITE(vp
, uio
, ioflag
, cred
);
722 fp
->f_nextoff
= uio
->uio_offset
;
724 if ((flags
& O_FOFFSET
) == 0)
725 vn_set_fpf_offset(fp
, uio
->uio_offset
);
733 vn_statfile(struct file
*fp
, struct stat
*sb
, struct ucred
*cred
)
738 vp
= (struct vnode
*)fp
->f_data
;
739 error
= vn_stat(vp
, sb
, cred
);
747 vn_stat(struct vnode
*vp
, struct stat
*sb
, struct ucred
*cred
)
756 error
= VOP_GETATTR(vp
, vap
);
761 * Zero the spare stat fields
768 * Copy from vattr table
770 if (vap
->va_fsid
!= VNOVAL
)
771 sb
->st_dev
= vap
->va_fsid
;
773 sb
->st_dev
= vp
->v_mount
->mnt_stat
.f_fsid
.val
[0];
774 sb
->st_ino
= vap
->va_fileid
;
776 switch (vap
->va_type
) {
794 /* This is a cosmetic change, symlinks do not have a mode. */
795 if (vp
->v_mount
->mnt_flag
& MNT_NOSYMFOLLOW
)
796 sb
->st_mode
&= ~ACCESSPERMS
; /* 0000 */
798 sb
->st_mode
|= ACCESSPERMS
; /* 0777 */
810 if (vap
->va_nlink
> (nlink_t
)-1)
811 sb
->st_nlink
= (nlink_t
)-1;
813 sb
->st_nlink
= vap
->va_nlink
;
814 sb
->st_uid
= vap
->va_uid
;
815 sb
->st_gid
= vap
->va_gid
;
816 sb
->st_rdev
= dev2udev(vp
->v_rdev
);
817 sb
->st_size
= vap
->va_size
;
818 sb
->st_atimespec
= vap
->va_atime
;
819 sb
->st_mtimespec
= vap
->va_mtime
;
820 sb
->st_ctimespec
= vap
->va_ctime
;
823 * A VCHR and VBLK device may track the last access and last modified
824 * time independantly of the filesystem. This is particularly true
825 * because device read and write calls may bypass the filesystem.
827 if (vp
->v_type
== VCHR
|| vp
->v_type
== VBLK
) {
830 if (dev
->si_lastread
) {
831 sb
->st_atimespec
.tv_sec
= dev
->si_lastread
;
832 sb
->st_atimespec
.tv_nsec
= 0;
834 if (dev
->si_lastwrite
) {
835 sb
->st_atimespec
.tv_sec
= dev
->si_lastwrite
;
836 sb
->st_atimespec
.tv_nsec
= 0;
842 * According to www.opengroup.org, the meaning of st_blksize is
843 * "a filesystem-specific preferred I/O block size for this
844 * object. In some filesystem types, this may vary from file
846 * Default to PAGE_SIZE after much discussion.
849 if (vap
->va_type
== VREG
) {
850 sb
->st_blksize
= vap
->va_blocksize
;
851 } else if (vn_isdisk(vp
, NULL
)) {
853 * XXX this is broken. If the device is not yet open (aka
854 * stat() call, aka v_rdev == NULL), how are we supposed
855 * to get a valid block size out of it?
859 sb
->st_blksize
= dev
->si_bsize_best
;
860 if (sb
->st_blksize
< dev
->si_bsize_phys
)
861 sb
->st_blksize
= dev
->si_bsize_phys
;
862 if (sb
->st_blksize
< BLKDEV_IOSIZE
)
863 sb
->st_blksize
= BLKDEV_IOSIZE
;
865 sb
->st_blksize
= PAGE_SIZE
;
868 sb
->st_flags
= vap
->va_flags
;
870 error
= priv_check_cred(cred
, PRIV_VFS_GENERATION
, 0);
874 sb
->st_gen
= (u_int32_t
)vap
->va_gen
;
876 sb
->st_blocks
= vap
->va_bytes
/ S_BLKSIZE
;
881 * MPALMOSTSAFE - acquires mplock
884 vn_ioctl(struct file
*fp
, u_long com
, caddr_t data
, struct ucred
*ucred
,
887 struct vnode
*vp
= ((struct vnode
*)fp
->f_data
);
893 switch (vp
->v_type
) {
896 if (com
== FIONREAD
) {
897 error
= VOP_GETATTR(vp
, &vattr
);
900 size
= vattr
.va_size
;
901 if ((vp
->v_flag
& VNOTSEEKABLE
) == 0)
902 size
-= vn_poll_fpf_offset(fp
);
903 if (size
> 0x7FFFFFFF)
909 if (com
== FIOASYNC
) { /* XXX */
921 if (com
== FIODTYPE
) {
922 if (vp
->v_type
!= VCHR
&& vp
->v_type
!= VBLK
) {
926 *(int *)data
= dev_dflags(vp
->v_rdev
) & D_TYPEMASK
;
930 error
= VOP_IOCTL(vp
, com
, data
, fp
->f_flag
, ucred
, msg
);
931 if (error
== 0 && com
== TIOCSCTTY
) {
932 struct proc
*p
= curthread
->td_proc
;
933 struct session
*sess
;
942 /* Do nothing if reassigning same control tty */
943 if (sess
->s_ttyvp
== vp
) {
949 /* Get rid of reference to old control tty */
963 * Check that the vnode is still valid, and if so
964 * acquire requested lock.
968 vn_lock(struct vnode
*vp
, int flags
)
970 debug_vn_lock(struct vnode
*vp
, int flags
, const char *filename
, int line
)
977 vp
->filename
= filename
;
979 error
= debuglockmgr(&vp
->v_lock
, flags
,
980 "vn_lock", filename
, line
);
982 error
= lockmgr(&vp
->v_lock
, flags
);
986 } while (flags
& LK_RETRY
);
989 * Because we (had better!) have a ref on the vnode, once it
990 * goes to VRECLAIMED state it will not be recycled until all
991 * refs go away. So we can just check the flag.
993 if (error
== 0 && (vp
->v_flag
& VRECLAIMED
)) {
994 lockmgr(&vp
->v_lock
, LK_RELEASE
);
1000 #ifdef DEBUG_VN_UNLOCK
1003 debug_vn_unlock(struct vnode
*vp
, const char *filename
, int line
)
1005 kprintf("vn_unlock from %s:%d\n", filename
, line
);
1006 lockmgr(&vp
->v_lock
, LK_RELEASE
);
1012 vn_unlock(struct vnode
*vp
)
1014 lockmgr(&vp
->v_lock
, LK_RELEASE
);
1023 vn_islocked(struct vnode
*vp
)
1025 return (lockstatus(&vp
->v_lock
, curthread
));
1029 * Return the lock status of a vnode and unlock the vnode
1030 * if we owned the lock. This is not a boolean, if the
1031 * caller cares what the lock status is the caller must
1032 * check the various possible values.
1034 * This only unlocks exclusive locks held by the caller,
1035 * it will NOT unlock shared locks (there is no way to
1036 * tell who the shared lock belongs to).
1041 vn_islocked_unlock(struct vnode
*vp
)
1045 vpls
= lockstatus(&vp
->v_lock
, curthread
);
1046 if (vpls
== LK_EXCLUSIVE
)
1047 lockmgr(&vp
->v_lock
, LK_RELEASE
);
1052 * Restore a vnode lock that we previously released via
1053 * vn_islocked_unlock(). This is a NOP if we did not
1054 * own the original lock.
1059 vn_islocked_relock(struct vnode
*vp
, int vpls
)
1063 if (vpls
== LK_EXCLUSIVE
)
1064 error
= lockmgr(&vp
->v_lock
, vpls
);
1071 vn_closefile(struct file
*fp
)
1075 fp
->f_ops
= &badfileops
;
1076 error
= vn_close(((struct vnode
*)fp
->f_data
), fp
->f_flag
);
1084 vn_kqfilter(struct file
*fp
, struct knote
*kn
)
1088 error
= VOP_KQFILTER(((struct vnode
*)fp
->f_data
), kn
);