The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/kern/vfs_default.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed
    6  * to Berkeley by John Heidemann of the UCLA Ficus project.
    7  *
    8  * Source: * @(#)i405_init.c 2.10 92/04/27 UCLA Ficus project
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 4. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/bio.h>
   41 #include <sys/buf.h>
   42 #include <sys/conf.h>
   43 #include <sys/event.h>
   44 #include <sys/kernel.h>
   45 #include <sys/limits.h>
   46 #include <sys/lock.h>
   47 #include <sys/malloc.h>
   48 #include <sys/mount.h>
   49 #include <sys/mutex.h>
   50 #include <sys/unistd.h>
   51 #include <sys/vnode.h>
   52 #include <sys/poll.h>
   53 
   54 #include <vm/vm.h>
   55 #include <vm/vm_object.h>
   56 #include <vm/vm_extern.h>
   57 #include <vm/pmap.h>
   58 #include <vm/vm_map.h>
   59 #include <vm/vm_page.h>
   60 #include <vm/vm_pager.h>
   61 #include <vm/vnode_pager.h>
   62 
   63 static int      vop_nolookup(struct vop_lookup_args *);
   64 static int      vop_nostrategy(struct vop_strategy_args *);
   65 
   66 /*
   67  * This vnode table stores what we want to do if the filesystem doesn't
   68  * implement a particular VOP.
   69  *
   70  * If there is no specific entry here, we will return EOPNOTSUPP.
   71  *
   72  */
   73 
   74 struct vop_vector default_vnodeops = {
   75         .vop_default =          NULL,
   76         .vop_bypass =           VOP_EOPNOTSUPP,
   77 
   78         .vop_advlock =          VOP_EINVAL,
   79         .vop_bmap =             vop_stdbmap,
   80         .vop_close =            VOP_NULL,
   81         .vop_fsync =            VOP_NULL,
   82         .vop_getpages =         vop_stdgetpages,
   83         .vop_getwritemount =    vop_stdgetwritemount,
   84         .vop_inactive =         VOP_NULL,
   85         .vop_ioctl =            VOP_ENOTTY,
   86         .vop_kqfilter =         vop_stdkqfilter,
   87         .vop_islocked =         vop_stdislocked,
   88         .vop_lease =            VOP_NULL,
   89         .vop_lock =             vop_stdlock,
   90         .vop_lookup =           vop_nolookup,
   91         .vop_open =             VOP_NULL,
   92         .vop_pathconf =         VOP_EINVAL,
   93         .vop_poll =             vop_nopoll,
   94         .vop_putpages =         vop_stdputpages,
   95         .vop_readlink =         VOP_EINVAL,
   96         .vop_revoke =           VOP_PANIC,
   97         .vop_strategy =         vop_nostrategy,
   98         .vop_unlock =           vop_stdunlock,
   99 };
  100 
  101 /*
  102  * Series of placeholder functions for various error returns for
  103  * VOPs.
  104  */
  105 
  106 int
  107 vop_eopnotsupp(struct vop_generic_args *ap)
  108 {
  109         /*
  110         printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name);
  111         */
  112 
  113         return (EOPNOTSUPP);
  114 }
  115 
  116 int
  117 vop_ebadf(struct vop_generic_args *ap)
  118 {
  119 
  120         return (EBADF);
  121 }
  122 
  123 int
  124 vop_enotty(struct vop_generic_args *ap)
  125 {
  126 
  127         return (ENOTTY);
  128 }
  129 
  130 int
  131 vop_einval(struct vop_generic_args *ap)
  132 {
  133 
  134         return (EINVAL);
  135 }
  136 
  137 int
  138 vop_null(struct vop_generic_args *ap)
  139 {
  140 
  141         return (0);
  142 }
  143 
  144 /*
  145  * Helper function to panic on some bad VOPs in some filesystems.
  146  */
  147 int
  148 vop_panic(struct vop_generic_args *ap)
  149 {
  150 
  151         panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name);
  152 }
  153 
  154 /*
  155  * vop_std<something> and vop_no<something> are default functions for use by
  156  * filesystems that need the "default reasonable" implementation for a
  157  * particular operation.
  158  *
  159  * The documentation for the operations they implement exists (if it exists)
  160  * in the VOP_<SOMETHING>(9) manpage (all uppercase).
  161  */
  162 
  163 /*
  164  * Default vop for filesystems that do not support name lookup
  165  */
  166 static int
  167 vop_nolookup(ap)
  168         struct vop_lookup_args /* {
  169                 struct vnode *a_dvp;
  170                 struct vnode **a_vpp;
  171                 struct componentname *a_cnp;
  172         } */ *ap;
  173 {
  174 
  175         *ap->a_vpp = NULL;
  176         return (ENOTDIR);
  177 }
  178 
  179 /*
  180  *      vop_nostrategy:
  181  *
  182  *      Strategy routine for VFS devices that have none.
  183  *
  184  *      BIO_ERROR and B_INVAL must be cleared prior to calling any strategy
  185  *      routine.  Typically this is done for a BIO_READ strategy call.
  186  *      Typically B_INVAL is assumed to already be clear prior to a write
  187  *      and should not be cleared manually unless you just made the buffer
  188  *      invalid.  BIO_ERROR should be cleared either way.
  189  */
  190 
  191 static int
  192 vop_nostrategy (struct vop_strategy_args *ap)
  193 {
  194         printf("No strategy for buffer at %p\n", ap->a_bp);
  195         vprint("vnode", ap->a_vp);
  196         ap->a_bp->b_ioflags |= BIO_ERROR;
  197         ap->a_bp->b_error = EOPNOTSUPP;
  198         bufdone(ap->a_bp);
  199         return (EOPNOTSUPP);
  200 }
  201 
  202 /*
  203  * vop_stdpathconf:
  204  *
  205  * Standard implementation of POSIX pathconf, to get information about limits
  206  * for a filesystem.
  207  * Override per filesystem for the case where the filesystem has smaller
  208  * limits.
  209  */
  210 int
  211 vop_stdpathconf(ap)
  212         struct vop_pathconf_args /* {
  213         struct vnode *a_vp;
  214         int a_name;
  215         int *a_retval;
  216         } */ *ap;
  217 {
  218 
  219         switch (ap->a_name) {
  220                 case _PC_LINK_MAX:
  221                         *ap->a_retval = LINK_MAX;
  222                         return (0);
  223                 case _PC_MAX_CANON:
  224                         *ap->a_retval = MAX_CANON;
  225                         return (0);
  226                 case _PC_MAX_INPUT:
  227                         *ap->a_retval = MAX_INPUT;
  228                         return (0);
  229                 case _PC_PIPE_BUF:
  230                         *ap->a_retval = PIPE_BUF;
  231                         return (0);
  232                 case _PC_CHOWN_RESTRICTED:
  233                         *ap->a_retval = 1;
  234                         return (0);
  235                 case _PC_VDISABLE:
  236                         *ap->a_retval = _POSIX_VDISABLE;
  237                         return (0);
  238                 default:
  239                         return (EINVAL);
  240         }
  241         /* NOTREACHED */
  242 }
  243 
  244 /*
  245  * Standard lock, unlock and islocked functions.
  246  */
  247 int
  248 vop_stdlock(ap)
  249         struct vop_lock_args /* {
  250                 struct vnode *a_vp;
  251                 int a_flags;
  252                 struct thread *a_td;
  253         } */ *ap;
  254 {
  255         struct vnode *vp = ap->a_vp;
  256 
  257         return (lockmgr(vp->v_vnlock, ap->a_flags, VI_MTX(vp), ap->a_td));
  258 }
  259 
  260 /* See above. */
  261 int
  262 vop_stdunlock(ap)
  263         struct vop_unlock_args /* {
  264                 struct vnode *a_vp;
  265                 int a_flags;
  266                 struct thread *a_td;
  267         } */ *ap;
  268 {
  269         struct vnode *vp = ap->a_vp;
  270 
  271         return (lockmgr(vp->v_vnlock, ap->a_flags | LK_RELEASE, VI_MTX(vp),
  272             ap->a_td));
  273 }
  274 
  275 /* See above. */
  276 int
  277 vop_stdislocked(ap)
  278         struct vop_islocked_args /* {
  279                 struct vnode *a_vp;
  280                 struct thread *a_td;
  281         } */ *ap;
  282 {
  283 
  284         return (lockstatus(ap->a_vp->v_vnlock, ap->a_td));
  285 }
  286 
  287 /*
  288  * Return true for select/poll.
  289  */
  290 int
  291 vop_nopoll(ap)
  292         struct vop_poll_args /* {
  293                 struct vnode *a_vp;
  294                 int  a_events;
  295                 struct ucred *a_cred;
  296                 struct thread *a_td;
  297         } */ *ap;
  298 {
  299         /*
  300          * Return true for read/write.  If the user asked for something
  301          * special, return POLLNVAL, so that clients have a way of
  302          * determining reliably whether or not the extended
  303          * functionality is present without hard-coding knowledge
  304          * of specific filesystem implementations.
  305          * Stay in sync with kern_conf.c::no_poll().
  306          */
  307         if (ap->a_events & ~POLLSTANDARD)
  308                 return (POLLNVAL);
  309 
  310         return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM));
  311 }
  312 
  313 /*
  314  * Implement poll for local filesystems that support it.
  315  */
  316 int
  317 vop_stdpoll(ap)
  318         struct vop_poll_args /* {
  319                 struct vnode *a_vp;
  320                 int  a_events;
  321                 struct ucred *a_cred;
  322                 struct thread *a_td;
  323         } */ *ap;
  324 {
  325         if (ap->a_events & ~POLLSTANDARD)
  326                 return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events));
  327         return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM));
  328 }
  329 
  330 /*
  331  * Return our mount point, as we will take charge of the writes.
  332  */
  333 int
  334 vop_stdgetwritemount(ap)
  335         struct vop_getwritemount_args /* {
  336                 struct vnode *a_vp;
  337                 struct mount **a_mpp;
  338         } */ *ap;
  339 {
  340         struct mount *mp;
  341 
  342         /*
  343          * XXX Since this is called unlocked we may be recycled while
  344          * attempting to ref the mount.  If this is the case or mountpoint
  345          * will be set to NULL.  We only have to prevent this call from
  346          * returning with a ref to an incorrect mountpoint.  It is not
  347          * harmful to return with a ref to our previous mountpoint.
  348          */
  349         mp = ap->a_vp->v_mount;
  350         if (mp != NULL) {
  351                 vfs_ref(mp);
  352                 if (mp != ap->a_vp->v_mount) {
  353                         vfs_rel(mp);
  354                         mp = NULL;
  355                 }
  356         }
  357         *(ap->a_mpp) = mp;
  358         return (0);
  359 }
  360 
  361 /* XXX Needs good comment and VOP_BMAP(9) manpage */
  362 int
  363 vop_stdbmap(ap)
  364         struct vop_bmap_args /* {
  365                 struct vnode *a_vp;
  366                 daddr_t  a_bn;
  367                 struct bufobj **a_bop;
  368                 daddr_t *a_bnp;
  369                 int *a_runp;
  370                 int *a_runb;
  371         } */ *ap;
  372 {
  373 
  374         if (ap->a_bop != NULL)
  375                 *ap->a_bop = &ap->a_vp->v_bufobj;
  376         if (ap->a_bnp != NULL)
  377                 *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize);
  378         if (ap->a_runp != NULL)
  379                 *ap->a_runp = 0;
  380         if (ap->a_runb != NULL)
  381                 *ap->a_runb = 0;
  382         return (0);
  383 }
  384 
  385 int
  386 vop_stdfsync(ap)
  387         struct vop_fsync_args /* {
  388                 struct vnode *a_vp;
  389                 struct ucred *a_cred;
  390                 int a_waitfor;
  391                 struct thread *a_td;
  392         } */ *ap;
  393 {
  394         struct vnode *vp = ap->a_vp;
  395         struct buf *bp;
  396         struct bufobj *bo;
  397         struct buf *nbp;
  398         int error = 0;
  399         int maxretry = 1000;     /* large, arbitrarily chosen */
  400 
  401         VI_LOCK(vp);
  402 loop1:
  403         /*
  404          * MARK/SCAN initialization to avoid infinite loops.
  405          */
  406         TAILQ_FOREACH(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs) {
  407                 bp->b_vflags &= ~BV_SCANNED;
  408                 bp->b_error = 0;
  409         }
  410 
  411         /*
  412          * Flush all dirty buffers associated with a vnode.
  413          */
  414 loop2:
  415         TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) {
  416                 if ((bp->b_vflags & BV_SCANNED) != 0)
  417                         continue;
  418                 bp->b_vflags |= BV_SCANNED;
  419                 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL))
  420                         continue;
  421                 VI_UNLOCK(vp);
  422                 KASSERT(bp->b_bufobj == &vp->v_bufobj,
  423                     ("bp %p wrong b_bufobj %p should be %p",
  424                     bp, bp->b_bufobj, &vp->v_bufobj));
  425                 if ((bp->b_flags & B_DELWRI) == 0)
  426                         panic("fsync: not dirty");
  427                 if ((vp->v_object != NULL) && (bp->b_flags & B_CLUSTEROK)) {
  428                         vfs_bio_awrite(bp);
  429                 } else {
  430                         bremfree(bp);
  431                         bawrite(bp);
  432                 }
  433                 VI_LOCK(vp);
  434                 goto loop2;
  435         }
  436 
  437         /*
  438          * If synchronous the caller expects us to completely resolve all
  439          * dirty buffers in the system.  Wait for in-progress I/O to
  440          * complete (which could include background bitmap writes), then
  441          * retry if dirty blocks still exist.
  442          */
  443         if (ap->a_waitfor == MNT_WAIT) {
  444                 bo = &vp->v_bufobj;
  445                 bufobj_wwait(bo, 0, 0);
  446                 if (bo->bo_dirty.bv_cnt > 0) {
  447                         /*
  448                          * If we are unable to write any of these buffers
  449                          * then we fail now rather than trying endlessly
  450                          * to write them out.
  451                          */
  452                         TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs)
  453                                 if ((error = bp->b_error) == 0)
  454                                         continue;
  455                         if (error == 0 && --maxretry >= 0)
  456                                 goto loop1;
  457                         error = EAGAIN;
  458                 }
  459         }
  460         VI_UNLOCK(vp);
  461         if (error == EAGAIN)
  462                 vprint("fsync: giving up on dirty", vp);
  463 
  464         return (error);
  465 }
  466 
  467 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */
  468 int
  469 vop_stdgetpages(ap)
  470         struct vop_getpages_args /* {
  471                 struct vnode *a_vp;
  472                 vm_page_t *a_m;
  473                 int a_count;
  474                 int a_reqpage;
  475                 vm_ooffset_t a_offset;
  476         } */ *ap;
  477 {
  478 
  479         return vnode_pager_generic_getpages(ap->a_vp, ap->a_m,
  480             ap->a_count, ap->a_reqpage);
  481 }
  482 
  483 int
  484 vop_stdkqfilter(struct vop_kqfilter_args *ap)
  485 {
  486         return vfs_kqfilter(ap);
  487 }
  488 
  489 /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */
  490 int
  491 vop_stdputpages(ap)
  492         struct vop_putpages_args /* {
  493                 struct vnode *a_vp;
  494                 vm_page_t *a_m;
  495                 int a_count;
  496                 int a_sync;
  497                 int *a_rtvals;
  498                 vm_ooffset_t a_offset;
  499         } */ *ap;
  500 {
  501 
  502         return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
  503              ap->a_sync, ap->a_rtvals);
  504 }
  505 
  506 /*
  507  * vfs default ops
  508  * used to fill the vfs function table to get reasonable default return values.
  509  */
  510 int
  511 vfs_stdroot (mp, flags, vpp, td)
  512         struct mount *mp;
  513         int flags;
  514         struct vnode **vpp;
  515         struct thread *td;
  516 {
  517 
  518         return (EOPNOTSUPP);
  519 }
  520 
  521 int
  522 vfs_stdstatfs (mp, sbp, td)
  523         struct mount *mp;
  524         struct statfs *sbp;
  525         struct thread *td;
  526 {
  527 
  528         return (EOPNOTSUPP);
  529 }
  530 
  531 int
  532 vfs_stdvptofh (vp, fhp)
  533         struct vnode *vp;
  534         struct fid *fhp;
  535 {
  536 
  537         return (EOPNOTSUPP);
  538 }
  539 
  540 int
  541 vfs_stdquotactl (mp, cmds, uid, arg, td)
  542         struct mount *mp;
  543         int cmds;
  544         uid_t uid;
  545         caddr_t arg;
  546         struct thread *td;
  547 {
  548 
  549         return (EOPNOTSUPP);
  550 }
  551 
  552 int
  553 vfs_stdsync(mp, waitfor, td)
  554         struct mount *mp;
  555         int waitfor;
  556         struct thread *td;
  557 {
  558         struct vnode *vp, *mvp;
  559         int error, lockreq, allerror = 0;
  560 
  561         lockreq = LK_EXCLUSIVE | LK_INTERLOCK;
  562         if (waitfor != MNT_WAIT)
  563                 lockreq |= LK_NOWAIT;
  564         /*
  565          * Force stale buffer cache information to be flushed.
  566          */
  567         MNT_ILOCK(mp);
  568 loop:
  569         MNT_VNODE_FOREACH(vp, mp, mvp) {
  570 
  571                 VI_LOCK(vp);
  572                 if (vp->v_bufobj.bo_dirty.bv_cnt == 0) {
  573                         VI_UNLOCK(vp);
  574                         continue;
  575                 }
  576                 MNT_IUNLOCK(mp);
  577 
  578                 if ((error = vget(vp, lockreq, td)) != 0) {
  579                         MNT_ILOCK(mp);
  580                         if (error == ENOENT) {
  581                                 MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
  582                                 goto loop;
  583                         }
  584                         continue;
  585                 }
  586                 error = VOP_FSYNC(vp, waitfor, td);
  587                 if (error)
  588                         allerror = error;
  589 
  590                 VOP_UNLOCK(vp, 0, td);
  591                 vrele(vp);
  592                 MNT_ILOCK(mp);
  593         }
  594         MNT_IUNLOCK(mp);
  595         return (allerror);
  596 }
  597 
  598 int
  599 vfs_stdnosync (mp, waitfor, td)
  600         struct mount *mp;
  601         int waitfor;
  602         struct thread *td;
  603 {
  604 
  605         return (0);
  606 }
  607 
  608 int
  609 vfs_stdvget (mp, ino, flags, vpp)
  610         struct mount *mp;
  611         ino_t ino;
  612         int flags;
  613         struct vnode **vpp;
  614 {
  615 
  616         return (EOPNOTSUPP);
  617 }
  618 
  619 int
  620 vfs_stdfhtovp (mp, fhp, vpp)
  621         struct mount *mp;
  622         struct fid *fhp;
  623         struct vnode **vpp;
  624 {
  625 
  626         return (EOPNOTSUPP);
  627 }
  628 
  629 int
  630 vfs_stdinit (vfsp)
  631         struct vfsconf *vfsp;
  632 {
  633 
  634         return (0);
  635 }
  636 
  637 int
  638 vfs_stduninit (vfsp)
  639         struct vfsconf *vfsp;
  640 {
  641 
  642         return(0);
  643 }
  644 
  645 int
  646 vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname, td)
  647         struct mount *mp;
  648         int cmd;
  649         struct vnode *filename_vp;
  650         int attrnamespace;
  651         const char *attrname;
  652         struct thread *td;
  653 {
  654 
  655         if (filename_vp != NULL)
  656                 VOP_UNLOCK(filename_vp, 0, td);
  657         return (EOPNOTSUPP);
  658 }
  659 
  660 int
  661 vfs_stdsysctl(mp, op, req)
  662         struct mount *mp;
  663         fsctlop_t op;
  664         struct sysctl_req *req;
  665 {
  666 
  667         return (EOPNOTSUPP);
  668 }
  669 
  670 /* end of vfs default ops */

Cache object: 3c0d0b5e29659aa06c26a6d34cedd841


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.