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


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FreeBSD/Linux Kernel Cross Reference
sys/fs/ntfs/ntfs_vfsops.c

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    1 /*      $NetBSD: ntfs_vfsops.c,v 1.23 1999/11/15 19:38:14 jdolecek Exp $        */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999 Semen Ustimenko
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD$
   29  */
   30 
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/namei.h>
   35 #include <sys/conf.h>
   36 #include <sys/proc.h>
   37 #include <sys/kernel.h>
   38 #include <sys/vnode.h>
   39 #include <sys/mount.h>
   40 #include <sys/bio.h>
   41 #include <sys/buf.h>
   42 #include <sys/fcntl.h>
   43 #include <sys/malloc.h>
   44 #include <sys/stat.h>
   45 #include <sys/systm.h>
   46 
   47 #include <geom/geom.h>
   48 #include <geom/geom_vfs.h>
   49 
   50 #include <vm/vm.h>
   51 #include <vm/vm_param.h>
   52 #include <vm/vm_page.h>
   53 #include <vm/vm_object.h>
   54 #include <vm/vm_extern.h>
   55 
   56 /*#define NTFS_DEBUG 1*/
   57 #include <fs/ntfs/ntfs.h>
   58 #include <fs/ntfs/ntfs_inode.h>
   59 #include <fs/ntfs/ntfs_subr.h>
   60 #include <fs/ntfs/ntfs_vfsops.h>
   61 #include <fs/ntfs/ntfs_ihash.h>
   62 #include <fs/ntfs/ntfsmount.h>
   63 
   64 static MALLOC_DEFINE(M_NTFSMNT, "ntfs_mount", "NTFS mount structure");
   65 MALLOC_DEFINE(M_NTFSNTNODE,"ntfs_ntnode",  "NTFS ntnode information");
   66 MALLOC_DEFINE(M_NTFSFNODE,"ntfs_fnode",  "NTFS fnode information");
   67 MALLOC_DEFINE(M_NTFSDIR,"ntfs_dir",  "NTFS dir buffer");
   68 
   69 struct sockaddr;
   70 
   71 static int      ntfs_mountfs(register struct vnode *, struct mount *, 
   72                                   struct thread *);
   73 static int      ntfs_calccfree(struct ntfsmount *ntmp, cn_t *cfreep);
   74 
   75 static vfs_init_t       ntfs_init;
   76 static vfs_uninit_t     ntfs_uninit;
   77 static vfs_vget_t       ntfs_vget;
   78 static vfs_fhtovp_t     ntfs_fhtovp;
   79 static vfs_cmount_t     ntfs_cmount;
   80 static vfs_mount_t      ntfs_mount;
   81 static vfs_root_t       ntfs_root;
   82 static vfs_statfs_t     ntfs_statfs;
   83 static vfs_unmount_t    ntfs_unmount;
   84 
   85 static b_strategy_t     ntfs_bufstrategy;
   86 
   87 /* 
   88  * Buffer operations for NTFS vnodes.
   89  * We punt on VOP_BMAP, so we need to do
   90  * strategy on the file's vnode rather
   91  * than the underlying device's
   92  */
   93 static struct buf_ops ntfs_vnbufops = {
   94         .bop_name     = "NTFS",
   95         .bop_strategy = ntfs_bufstrategy,
   96 };
   97 
   98 static int
   99 ntfs_init (
  100         struct vfsconf *vcp )
  101 {
  102         ntfs_nthashinit();
  103         ntfs_toupper_init();
  104         return 0;
  105 }
  106 
  107 static int
  108 ntfs_uninit (
  109         struct vfsconf *vcp )
  110 {
  111         ntfs_toupper_destroy();
  112         ntfs_nthashdestroy();
  113         return 0;
  114 }
  115 
  116 static int
  117 ntfs_cmount ( 
  118         struct mntarg *ma,
  119         void *data,
  120         int flags,
  121         struct thread *td )
  122 {
  123         int error;
  124         struct ntfs_args args;
  125 
  126         error = copyin(data, (caddr_t)&args, sizeof args);
  127         if (error)
  128                 return (error);
  129         ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
  130         ma = mount_arg(ma, "export", &args.export, sizeof args.export);
  131         ma = mount_argf(ma, "uid", "%d", args.uid);
  132         ma = mount_argf(ma, "gid", "%d", args.gid);
  133         ma = mount_argf(ma, "mode", "%d", args.mode);
  134         ma = mount_argb(ma, args.flag & NTFS_MFLAG_CASEINS, "nocaseins");
  135         ma = mount_argb(ma, args.flag & NTFS_MFLAG_ALLNAMES, "noallnames");
  136         if (args.flag & NTFS_MFLAG_KICONV) {
  137                 ma = mount_argsu(ma, "cs_ntfs", args.cs_ntfs, 64);
  138                 ma = mount_argsu(ma, "cs_local", args.cs_local, 64);
  139         }
  140 
  141         error = kernel_mount(ma, flags);
  142 
  143         return (error);
  144 }
  145 
  146 static const char *ntfs_opts[] = {
  147         "from", "export", "uid", "gid", "mode", "caseins", "allnames",
  148         "kiconv", "cs_ntfs", "cs_local", NULL
  149 };
  150 
  151 static int
  152 ntfs_mount ( 
  153         struct mount *mp,
  154         struct thread *td )
  155 {
  156         int             err = 0, error;
  157         struct vnode    *devvp;
  158         struct nameidata ndp;
  159         char *from;
  160 
  161         if (vfs_filteropt(mp->mnt_optnew, ntfs_opts))
  162                 return (EINVAL);
  163 
  164         from = vfs_getopts(mp->mnt_optnew, "from", &error);
  165         if (error)      
  166                 return (error);
  167 
  168         /*
  169          * If updating, check whether changing from read-only to
  170          * read/write.
  171          */
  172         if (mp->mnt_flag & MNT_UPDATE) {
  173                 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) {
  174                         /* Process export requests in vfs_mount.c */
  175                         goto success;
  176                 } else {
  177                         printf("ntfs_mount(): MNT_UPDATE not supported\n");
  178                         err = EINVAL;
  179                         goto error_1;
  180                 }
  181         }
  182 
  183         /*
  184          * Not an update, or updating the name: look up the name
  185          * and verify that it refers to a sensible block device.
  186          */
  187         NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, from, td);
  188         err = namei(&ndp);
  189         if (err) {
  190                 /* can't get devvp!*/
  191                 goto error_1;
  192         }
  193         NDFREE(&ndp, NDF_ONLY_PNBUF);
  194         devvp = ndp.ni_vp;
  195 
  196         if (!vn_isdisk(devvp, &err))  {
  197                 vput(devvp);
  198                 return (err);
  199         }
  200 
  201         if (mp->mnt_flag & MNT_UPDATE) {
  202 #if 0
  203                 /*
  204                  ********************
  205                  * UPDATE
  206                  ********************
  207                  */
  208 
  209                 if (devvp != ntmp->um_devvp)
  210                         err = EINVAL;   /* needs translation */
  211                 vput(devvp);
  212                 if (err)
  213                         return (err);
  214 #endif
  215         } else {
  216                 /*
  217                  ********************
  218                  * NEW MOUNT
  219                  ********************
  220                  */
  221 
  222                 /*
  223                  * Since this is a new mount, we want the names for
  224                  * the device and the mount point copied in.  If an
  225                  * error occurs, the mountpoint is discarded by the
  226                  * upper level code.  Note that vfs_mount() handles
  227                  * copying the mountpoint f_mntonname for us, so we
  228                  * don't have to do it here unless we want to set it
  229                  * to something other than "path" for some rason.
  230                  */
  231                 /* Save "mounted from" info for mount point (NULL pad)*/
  232                 vfs_mountedfrom(mp, from);
  233 
  234                 err = ntfs_mountfs(devvp, mp, td);
  235         }
  236         if (err) {
  237                 vrele(devvp);
  238                 return (err);
  239         }
  240 
  241         goto success;
  242 
  243 error_1:        /* no state to back out*/
  244         /* XXX: missing NDFREE(&ndp, ...) */
  245 
  246 success:
  247         return(err);
  248 }
  249 
  250 /*
  251  * Common code for mount and mountroot
  252  */
  253 int
  254 ntfs_mountfs(devvp, mp, td)
  255         register struct vnode *devvp;
  256         struct mount *mp;
  257         struct thread *td;
  258 {
  259         struct buf *bp;
  260         struct ntfsmount *ntmp;
  261         struct cdev *dev = devvp->v_rdev;
  262         int error, ronly, i, v;
  263         struct vnode *vp;
  264         struct g_consumer *cp;
  265         struct g_provider *pp;
  266         char *cs_ntfs, *cs_local;
  267 
  268         ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
  269         DROP_GIANT();
  270         g_topology_lock();
  271 
  272         /*
  273          * XXX: Do not allow more than one consumer to open a device
  274          *      associated with a particular GEOM provider.
  275          *      This disables multiple read-only mounts of a device,
  276          *      but it gets rid of panics in vget() when you try to
  277          *      mount the same device more than once.
  278          */
  279         pp = g_dev_getprovider(devvp->v_rdev);
  280         if ((pp != NULL) && ((pp->acr | pp->acw | pp->ace ) != 0)) 
  281                 error = EPERM;
  282         else 
  283                 error = g_vfs_open(devvp, &cp, "ntfs", ronly ? 0 : 1);
  284 
  285         g_topology_unlock();
  286         PICKUP_GIANT();
  287         VOP_UNLOCK(devvp, 0, td);
  288         if (error)
  289                 return (error);
  290 
  291         bp = NULL;
  292 
  293         error = bread(devvp, BBLOCK, BBSIZE, NOCRED, &bp);
  294         if (error)
  295                 goto out;
  296         ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK | M_ZERO);
  297         bcopy( bp->b_data, &ntmp->ntm_bootfile, sizeof(struct bootfile) );
  298         /*
  299          * We must not cache the boot block if its size is not exactly
  300          * one cluster in order to avoid confusing the buffer cache when
  301          * the boot file is read later by ntfs_readntvattr_plain(), which
  302          * reads a cluster at a time.
  303          */
  304         if (ntfs_cntob(1) != BBSIZE)
  305                 bp->b_flags |= B_NOCACHE;
  306         brelse( bp );
  307         bp = NULL;
  308 
  309         if (strncmp((const char *)ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) {
  310                 error = EINVAL;
  311                 dprintf(("ntfs_mountfs: invalid boot block\n"));
  312                 goto out;
  313         }
  314 
  315         {
  316                 int8_t cpr = ntmp->ntm_mftrecsz;
  317                 if( cpr > 0 )
  318                         ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr;
  319                 else
  320                         ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps;
  321         }
  322         dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
  323                 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media,
  324                 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec));
  325         dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n",
  326                 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn));
  327 
  328         ntmp->ntm_mountp = mp;
  329         ntmp->ntm_devvp = devvp;
  330         if (1 == vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v))
  331                 ntmp->ntm_uid = v;
  332         if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v))
  333                 ntmp->ntm_gid = v;
  334         if (1 == vfs_scanopt(mp->mnt_optnew, "mode", "%d", &v))
  335                 ntmp->ntm_mode = v & ACCESSPERMS;
  336         vfs_flagopt(mp->mnt_optnew,
  337             "caseins", &ntmp->ntm_flag, NTFS_MFLAG_CASEINS);
  338         vfs_flagopt(mp->mnt_optnew,
  339             "allnames", &ntmp->ntm_flag, NTFS_MFLAG_ALLNAMES);
  340         ntmp->ntm_cp = cp;
  341         ntmp->ntm_bo = &devvp->v_bufobj;
  342 
  343         cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error);
  344         if (error && error != ENOENT)
  345                 goto out;
  346         cs_ntfs = vfs_getopts(mp->mnt_optnew, "cs_ntfs", &error);
  347         if (error && error != ENOENT)
  348                 goto out;
  349         /* Copy in the 8-bit to Unicode conversion table */
  350         /* Initialize Unicode to 8-bit table from 8toU table */
  351         ntfs_82u_init(ntmp, cs_local, cs_ntfs);
  352         if (cs_local != NULL && cs_ntfs != NULL)
  353                 ntfs_u28_init(ntmp, NULL, cs_local, cs_ntfs);
  354         else
  355                 ntfs_u28_init(ntmp, ntmp->ntm_82u, cs_local, cs_ntfs);
  356 
  357         mp->mnt_data = (qaddr_t)ntmp;
  358 
  359         dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n",
  360                 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.",
  361                 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"",
  362                 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode));
  363 
  364         /*
  365          * We read in some system nodes to do not allow 
  366          * reclaim them and to have everytime access to them.
  367          */ 
  368         {
  369                 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO };
  370                 for (i=0; i<3; i++) {
  371                         error = VFS_VGET(mp, pi[i], LK_EXCLUSIVE,
  372                                          &(ntmp->ntm_sysvn[pi[i]]));
  373                         if(error)
  374                                 goto out1;
  375                         ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM;
  376                         VREF(ntmp->ntm_sysvn[pi[i]]);
  377                         vput(ntmp->ntm_sysvn[pi[i]]);
  378                 }
  379         }
  380 
  381         /* read the Unicode lowercase --> uppercase translation table,
  382          * if necessary */
  383         if ((error = ntfs_toupper_use(mp, ntmp)))
  384                 goto out1;
  385 
  386         /*
  387          * Scan $BitMap and count free clusters
  388          */
  389         error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree);
  390         if(error)
  391                 goto out1;
  392 
  393         /*
  394          * Read and translate to internal format attribute
  395          * definition file. 
  396          */
  397         {
  398                 int num,j;
  399                 struct attrdef ad;
  400 
  401                 /* Open $AttrDef */
  402                 error = VFS_VGET(mp, NTFS_ATTRDEFINO, LK_EXCLUSIVE, &vp );
  403                 if(error) 
  404                         goto out1;
  405 
  406                 /* Count valid entries */
  407                 for(num=0;;num++) {
  408                         error = ntfs_readattr(ntmp, VTONT(vp),
  409                                         NTFS_A_DATA, NULL,
  410                                         num * sizeof(ad), sizeof(ad),
  411                                         &ad, NULL);
  412                         if (error)
  413                                 goto out1;
  414                         if (ad.ad_name[0] == 0)
  415                                 break;
  416                 }
  417 
  418                 /* Alloc memory for attribute definitions */
  419                 MALLOC(ntmp->ntm_ad, struct ntvattrdef *,
  420                         num * sizeof(struct ntvattrdef),
  421                         M_NTFSMNT, M_WAITOK);
  422 
  423                 ntmp->ntm_adnum = num;
  424 
  425                 /* Read them and translate */
  426                 for(i=0;i<num;i++){
  427                         error = ntfs_readattr(ntmp, VTONT(vp),
  428                                         NTFS_A_DATA, NULL,
  429                                         i * sizeof(ad), sizeof(ad),
  430                                         &ad, NULL);
  431                         if (error)
  432                                 goto out1;
  433                         j = 0;
  434                         do {
  435                                 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j];
  436                         } while(ad.ad_name[j++]);
  437                         ntmp->ntm_ad[i].ad_namelen = j - 1;
  438                         ntmp->ntm_ad[i].ad_type = ad.ad_type;
  439                 }
  440 
  441                 vput(vp);
  442         }
  443 
  444         mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
  445         mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
  446         mp->mnt_maxsymlinklen = 0;
  447         MNT_ILOCK(mp);
  448         mp->mnt_flag |= MNT_LOCAL;
  449         MNT_IUNLOCK(mp);
  450         return (0);
  451 
  452 out1:
  453         for(i=0;i<NTFS_SYSNODESNUM;i++)
  454                 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
  455 
  456         if (vflush(mp, 0, 0, td))
  457                 dprintf(("ntfs_mountfs: vflush failed\n"));
  458 
  459 out:
  460         if (bp)
  461                 brelse(bp);
  462 
  463         DROP_GIANT();
  464         g_topology_lock();
  465         g_vfs_close(cp, td);
  466         g_topology_unlock();
  467         PICKUP_GIANT();
  468         
  469         return (error);
  470 }
  471 
  472 static int
  473 ntfs_unmount( 
  474         struct mount *mp,
  475         int mntflags,
  476         struct thread *td)
  477 {
  478         struct ntfsmount *ntmp;
  479         int error, flags, i;
  480 
  481         dprintf(("ntfs_unmount: unmounting...\n"));
  482         ntmp = VFSTONTFS(mp);
  483 
  484         flags = 0;
  485         if(mntflags & MNT_FORCE)
  486                 flags |= FORCECLOSE;
  487 
  488         dprintf(("ntfs_unmount: vflushing...\n"));
  489         error = vflush(mp, 0, flags | SKIPSYSTEM, td);
  490         if (error) {
  491                 printf("ntfs_unmount: vflush failed: %d\n",error);
  492                 return (error);
  493         }
  494 
  495         /* Check if only system vnodes are rest */
  496         for(i=0;i<NTFS_SYSNODESNUM;i++)
  497                  if((ntmp->ntm_sysvn[i]) && 
  498                     (vrefcnt(ntmp->ntm_sysvn[i]) > 1)) return (EBUSY);
  499 
  500         /* Dereference all system vnodes */
  501         for(i=0;i<NTFS_SYSNODESNUM;i++)
  502                  if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
  503 
  504         /* vflush system vnodes */
  505         error = vflush(mp, 0, flags, td);
  506         if (error)
  507                 printf("ntfs_unmount: vflush failed(sysnodes): %d\n",error);
  508 
  509         vinvalbuf(ntmp->ntm_devvp, V_SAVE, td, 0, 0);
  510 
  511         DROP_GIANT();
  512         g_topology_lock();
  513         g_vfs_close(ntmp->ntm_cp, td);
  514         g_topology_unlock();
  515         PICKUP_GIANT();
  516 
  517         vrele(ntmp->ntm_devvp);
  518 
  519         /* free the toupper table, if this has been last mounted ntfs volume */
  520         ntfs_toupper_unuse();
  521 
  522         dprintf(("ntfs_umount: freeing memory...\n"));
  523         ntfs_u28_uninit(ntmp);
  524         ntfs_82u_uninit(ntmp);
  525         mp->mnt_data = (qaddr_t)0;
  526         MNT_ILOCK(mp);
  527         mp->mnt_flag &= ~MNT_LOCAL;
  528         MNT_IUNLOCK(mp);
  529         FREE(ntmp->ntm_ad, M_NTFSMNT);
  530         FREE(ntmp, M_NTFSMNT);
  531         return (error);
  532 }
  533 
  534 static int
  535 ntfs_root(
  536         struct mount *mp,
  537         int flags,
  538         struct vnode **vpp,
  539         struct thread *td )
  540 {
  541         struct vnode *nvp;
  542         int error = 0;
  543 
  544         dprintf(("ntfs_root(): sysvn: %p\n",
  545                 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO]));
  546         error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, LK_EXCLUSIVE, &nvp);
  547         if(error) {
  548                 printf("ntfs_root: VFS_VGET failed: %d\n",error);
  549                 return (error);
  550         }
  551 
  552         *vpp = nvp;
  553         return (0);
  554 }
  555 
  556 static int
  557 ntfs_calccfree(
  558         struct ntfsmount *ntmp,
  559         cn_t *cfreep)
  560 {
  561         struct vnode *vp;
  562         u_int8_t *tmp;
  563         int j, error;
  564         long cfree = 0;
  565         size_t bmsize, i;
  566 
  567         vp = ntmp->ntm_sysvn[NTFS_BITMAPINO];
  568 
  569         bmsize = VTOF(vp)->f_size;
  570 
  571         MALLOC(tmp, u_int8_t *, bmsize, M_TEMP, M_WAITOK);
  572 
  573         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  574                                0, bmsize, tmp, NULL);
  575         if (error)
  576                 goto out;
  577 
  578         for(i=0;i<bmsize;i++)
  579                 for(j=0;j<8;j++)
  580                         if(~tmp[i] & (1 << j)) cfree++;
  581         *cfreep = cfree;
  582 
  583     out:
  584         FREE(tmp, M_TEMP);
  585         return(error);
  586 }
  587 
  588 static int
  589 ntfs_statfs(
  590         struct mount *mp,
  591         struct statfs *sbp,
  592         struct thread *td)
  593 {
  594         struct ntfsmount *ntmp = VFSTONTFS(mp);
  595         u_int64_t mftsize,mftallocated;
  596 
  597         dprintf(("ntfs_statfs():\n"));
  598 
  599         mftsize = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_size;
  600         mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated;
  601 
  602         sbp->f_type = mp->mnt_vfc->vfc_typenum;
  603         sbp->f_bsize = ntmp->ntm_bps;
  604         sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc;
  605         sbp->f_blocks = ntmp->ntm_bootfile.bf_spv;
  606         sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree);
  607         sbp->f_ffree = sbp->f_bfree / ntmp->ntm_bpmftrec;
  608         sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) +
  609                        sbp->f_ffree;
  610         sbp->f_flags = mp->mnt_flag;
  611 
  612         return (0);
  613 }
  614 
  615 /*ARGSUSED*/
  616 static int
  617 ntfs_fhtovp(
  618         struct mount *mp,
  619         struct fid *fhp,
  620         struct vnode **vpp)
  621 {
  622         struct vnode *nvp;
  623         struct ntfid *ntfhp = (struct ntfid *)fhp;
  624         int error;
  625 
  626         ddprintf(("ntfs_fhtovp(): %d\n", ntfhp->ntfid_ino));
  627 
  628         if ((error = VFS_VGET(mp, ntfhp->ntfid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
  629                 *vpp = NULLVP;
  630                 return (error);
  631         }
  632         /* XXX as unlink/rmdir/mkdir/creat are not currently possible
  633          * with NTFS, we don't need to check anything else for now */
  634         *vpp = nvp;
  635         vnode_create_vobject(nvp, VTOF(nvp)->f_size, curthread);
  636         return (0);
  637 }
  638 
  639 int
  640 ntfs_vgetex(
  641         struct mount *mp,
  642         ino_t ino,
  643         u_int32_t attrtype,
  644         char *attrname,
  645         u_long lkflags,
  646         u_long flags,
  647         struct thread *td,
  648         struct vnode **vpp) 
  649 {
  650         int error;
  651         register struct ntfsmount *ntmp;
  652         struct ntnode *ip;
  653         struct fnode *fp;
  654         struct vnode *vp;
  655         enum vtype f_type;
  656 
  657         dprintf(("ntfs_vgetex: ino: %d, attr: 0x%x:%s, lkf: 0x%lx, f: 0x%lx\n",
  658                 ino, attrtype, attrname?attrname:"", (u_long)lkflags,
  659                 (u_long)flags));
  660 
  661         ntmp = VFSTONTFS(mp);
  662         *vpp = NULL;
  663 
  664         /* Get ntnode */
  665         error = ntfs_ntlookup(ntmp, ino, &ip);
  666         if (error) {
  667                 printf("ntfs_vget: ntfs_ntget failed\n");
  668                 return (error);
  669         }
  670 
  671         /* It may be not initialized fully, so force load it */
  672         if (!(flags & VG_DONTLOADIN) && !(ip->i_flag & IN_LOADED)) {
  673                 error = ntfs_loadntnode(ntmp, ip);
  674                 if(error) {
  675                         printf("ntfs_vget: CAN'T LOAD ATTRIBUTES FOR INO: %d\n",
  676                                ip->i_number);
  677                         ntfs_ntput(ip);
  678                         return (error);
  679                 }
  680         }
  681 
  682         error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp);
  683         if (error) {
  684                 printf("ntfs_vget: ntfs_fget failed\n");
  685                 ntfs_ntput(ip);
  686                 return (error);
  687         }
  688 
  689         f_type = VNON;
  690         if (!(flags & VG_DONTVALIDFN) && !(fp->f_flag & FN_VALID)) {
  691                 if ((ip->i_frflag & NTFS_FRFLAG_DIR) &&
  692                     (fp->f_attrtype == NTFS_A_DATA && fp->f_attrname == NULL)) {
  693                         f_type = VDIR;
  694                 } else if (flags & VG_EXT) {
  695                         f_type = VNON;
  696                         fp->f_size = fp->f_allocated = 0;
  697                 } else {
  698                         f_type = VREG;  
  699 
  700                         error = ntfs_filesize(ntmp, fp, 
  701                                               &fp->f_size, &fp->f_allocated);
  702                         if (error) {
  703                                 ntfs_ntput(ip);
  704                                 return (error);
  705                         }
  706                 }
  707 
  708                 fp->f_flag |= FN_VALID;
  709         }
  710 
  711         if (FTOV(fp)) {
  712                 vget(FTOV(fp), lkflags, td);
  713                 *vpp = FTOV(fp);
  714                 ntfs_ntput(ip);
  715                 return (0);
  716         }
  717 
  718         error = getnewvnode("ntfs", ntmp->ntm_mountp, &ntfs_vnodeops, &vp);
  719         if(error) {
  720                 ntfs_frele(fp);
  721                 ntfs_ntput(ip);
  722                 return (error);
  723         }
  724         /* XXX: Too early for mpsafe fs, lacks vnode lock */
  725         error = insmntque(vp, ntmp->ntm_mountp);
  726         if (error) {
  727                 ntfs_frele(fp);
  728                 ntfs_ntput(ip);
  729                 return (error);
  730         }
  731         dprintf(("ntfs_vget: vnode: %p for ntnode: %d\n", vp,ino));
  732 
  733         fp->f_vp = vp;
  734         vp->v_data = fp;
  735         vp->v_type = f_type;
  736 
  737         vp->v_bufobj.bo_ops = &ntfs_vnbufops;
  738         vp->v_bufobj.bo_private = vp;
  739 
  740         if (ino == NTFS_ROOTINO)
  741                 vp->v_vflag |= VV_ROOT;
  742 
  743         ntfs_ntput(ip);
  744 
  745         if (lkflags & LK_TYPE_MASK) {
  746                 error = vn_lock(vp, lkflags, td);
  747                 if (error) {
  748                         vput(vp);
  749                         return (error);
  750                 }
  751         }
  752 
  753         *vpp = vp;
  754         return (0);
  755         
  756 }
  757 
  758 static int
  759 ntfs_vget(
  760         struct mount *mp,
  761         ino_t ino,
  762         int lkflags,
  763         struct vnode **vpp) 
  764 {
  765         return ntfs_vgetex(mp, ino, NTFS_A_DATA, NULL, lkflags, 0,
  766             curthread, vpp);
  767 }
  768 
  769 static void
  770 ntfs_bufstrategy(struct bufobj *bo, struct buf *bp)
  771 {
  772         struct vnode *vp;
  773         int rc;
  774 
  775         vp = bo->bo_private;
  776         KASSERT(bo == &vp->v_bufobj, ("BO/VP mismatch: vp %p bo %p != %p",
  777             vp, &vp->v_bufobj, bo));
  778         rc = VOP_STRATEGY(vp, bp);
  779         KASSERT(rc == 0, ("NTFS VOP_STRATEGY failed: bp=%p, "
  780                 "vp=%p, rc=%d", bp, vp, rc));
  781 }
  782 
  783 static struct vfsops ntfs_vfsops = {
  784         .vfs_fhtovp =   ntfs_fhtovp,
  785         .vfs_init =     ntfs_init,
  786         .vfs_cmount =   ntfs_cmount,
  787         .vfs_mount =    ntfs_mount,
  788         .vfs_root =     ntfs_root,
  789         .vfs_statfs =   ntfs_statfs,
  790         .vfs_uninit =   ntfs_uninit,
  791         .vfs_unmount =  ntfs_unmount,
  792         .vfs_vget =     ntfs_vget,
  793 };
  794 VFS_SET(ntfs_vfsops, ntfs, 0);
  795 MODULE_VERSION(ntfs, 1);

Cache object: 102adc7e5fd2b0703ed258f4d53718f1


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