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: stable/8/sys/fs/ntfs/ntfs_vfsops.c 214420 2010-10-27 15:44:49Z kib $
   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 {
  122         struct ntfs_args args;
  123         struct export_args exp;
  124         int error;
  125 
  126         error = copyin(data, &args, sizeof(args));
  127         if (error)
  128                 return (error);
  129         vfs_oexport_conv(&args.export, &exp);
  130         ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN);
  131         ma = mount_arg(ma, "export", &exp, sizeof(exp));
  132         ma = mount_argf(ma, "uid", "%d", args.uid);
  133         ma = mount_argf(ma, "gid", "%d", args.gid);
  134         ma = mount_argf(ma, "mode", "%d", args.mode);
  135         ma = mount_argb(ma, args.flag & NTFS_MFLAG_CASEINS, "nocaseins");
  136         ma = mount_argb(ma, args.flag & NTFS_MFLAG_ALLNAMES, "noallnames");
  137         if (args.flag & NTFS_MFLAG_KICONV) {
  138                 ma = mount_argsu(ma, "cs_ntfs", args.cs_ntfs, 64);
  139                 ma = mount_argsu(ma, "cs_local", args.cs_local, 64);
  140         }
  141 
  142         error = kernel_mount(ma, flags);
  143 
  144         return (error);
  145 }
  146 
  147 static const char *ntfs_opts[] = {
  148         "from", "export", "uid", "gid", "mode", "caseins", "allnames",
  149         "kiconv", "cs_ntfs", "cs_local", NULL
  150 };
  151 
  152 static int
  153 ntfs_mount (struct mount *mp)
  154 {
  155         int             err = 0, error;
  156         struct vnode    *devvp;
  157         struct nameidata ndp;
  158         char *from;
  159 
  160         if (vfs_filteropt(mp->mnt_optnew, ntfs_opts))
  161                 return (EINVAL);
  162 
  163         from = vfs_getopts(mp->mnt_optnew, "from", &error);
  164         if (error)      
  165                 return (error);
  166 
  167         /*
  168          * If updating, check whether changing from read-only to
  169          * read/write.
  170          */
  171         if (mp->mnt_flag & MNT_UPDATE) {
  172                 if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) {
  173                         /* Process export requests in vfs_mount.c */
  174                         goto success;
  175                 } else {
  176                         printf("ntfs_mount(): MNT_UPDATE not supported\n");
  177                         err = EINVAL;
  178                         goto error_1;
  179                 }
  180         }
  181 
  182         /*
  183          * Not an update, or updating the name: look up the name
  184          * and verify that it refers to a sensible block device.
  185          */
  186         NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, from, curthread);
  187         err = namei(&ndp);
  188         if (err) {
  189                 /* can't get devvp!*/
  190                 goto error_1;
  191         }
  192         NDFREE(&ndp, NDF_ONLY_PNBUF);
  193         devvp = ndp.ni_vp;
  194 
  195         if (!vn_isdisk(devvp, &err))  {
  196                 vput(devvp);
  197                 return (err);
  198         }
  199 
  200         if (mp->mnt_flag & MNT_UPDATE) {
  201 #if 0
  202                 /*
  203                  ********************
  204                  * UPDATE
  205                  ********************
  206                  */
  207 
  208                 if (devvp != ntmp->um_devvp)
  209                         err = EINVAL;   /* needs translation */
  210                 vput(devvp);
  211                 if (err)
  212                         return (err);
  213 #endif
  214         } else {
  215                 /*
  216                  ********************
  217                  * NEW MOUNT
  218                  ********************
  219                  */
  220 
  221                 /*
  222                  * Since this is a new mount, we want the names for
  223                  * the device and the mount point copied in.  If an
  224                  * error occurs, the mountpoint is discarded by the
  225                  * upper level code.  Note that vfs_mount() handles
  226                  * copying the mountpoint f_mntonname for us, so we
  227                  * don't have to do it here unless we want to set it
  228                  * to something other than "path" for some rason.
  229                  */
  230                 /* Save "mounted from" info for mount point (NULL pad)*/
  231                 vfs_mountedfrom(mp, from);
  232 
  233                 err = ntfs_mountfs(devvp, mp, curthread);
  234         }
  235         if (err) {
  236                 vrele(devvp);
  237                 return (err);
  238         }
  239 
  240         goto success;
  241 
  242 error_1:        /* no state to back out*/
  243         /* XXX: missing NDFREE(&ndp, ...) */
  244 
  245 success:
  246         return(err);
  247 }
  248 
  249 /*
  250  * Common code for mount and mountroot
  251  */
  252 int
  253 ntfs_mountfs(devvp, mp, td)
  254         register struct vnode *devvp;
  255         struct mount *mp;
  256         struct thread *td;
  257 {
  258         struct buf *bp;
  259         struct ntfsmount *ntmp;
  260         struct cdev *dev = devvp->v_rdev;
  261         int error, ronly, i, v;
  262         struct vnode *vp;
  263         struct g_consumer *cp;
  264         struct g_provider *pp;
  265         char *cs_ntfs, *cs_local;
  266 
  267         ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
  268         DROP_GIANT();
  269         g_topology_lock();
  270 
  271         /*
  272          * XXX: Do not allow more than one consumer to open a device
  273          *      associated with a particular GEOM provider.
  274          *      This disables multiple read-only mounts of a device,
  275          *      but it gets rid of panics in vget() when you try to
  276          *      mount the same device more than once.
  277          */
  278         pp = g_dev_getprovider(devvp->v_rdev);
  279         if ((pp != NULL) && ((pp->acr | pp->acw | pp->ace ) != 0)) 
  280                 error = EPERM;
  281         else 
  282                 error = g_vfs_open(devvp, &cp, "ntfs", ronly ? 0 : 1);
  283 
  284         g_topology_unlock();
  285         PICKUP_GIANT();
  286         VOP_UNLOCK(devvp, 0);
  287         if (error)
  288                 return (error);
  289 
  290         bp = NULL;
  291 
  292         error = bread(devvp, BBLOCK, BBSIZE, NOCRED, &bp);
  293         if (error)
  294                 goto out;
  295         ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK | M_ZERO);
  296         bcopy( bp->b_data, &ntmp->ntm_bootfile, sizeof(struct bootfile) );
  297         /*
  298          * We must not cache the boot block if its size is not exactly
  299          * one cluster in order to avoid confusing the buffer cache when
  300          * the boot file is read later by ntfs_readntvattr_plain(), which
  301          * reads a cluster at a time.
  302          */
  303         if (ntfs_cntob(1) != BBSIZE)
  304                 bp->b_flags |= B_NOCACHE;
  305         brelse( bp );
  306         bp = NULL;
  307 
  308         if (strncmp((const char *)ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) {
  309                 error = EINVAL;
  310                 dprintf(("ntfs_mountfs: invalid boot block\n"));
  311                 goto out;
  312         }
  313 
  314         {
  315                 int8_t cpr = ntmp->ntm_mftrecsz;
  316                 if( cpr > 0 )
  317                         ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr;
  318                 else
  319                         ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps;
  320         }
  321         dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
  322                 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media,
  323                 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec));
  324         dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n",
  325                 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn));
  326 
  327         ntmp->ntm_mountp = mp;
  328         ntmp->ntm_devvp = devvp;
  329         if (1 == vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v))
  330                 ntmp->ntm_uid = v;
  331         if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v))
  332                 ntmp->ntm_gid = v;
  333         if (1 == vfs_scanopt(mp->mnt_optnew, "mode", "%d", &v))
  334                 ntmp->ntm_mode = v & ACCESSPERMS;
  335         vfs_flagopt(mp->mnt_optnew,
  336             "caseins", &ntmp->ntm_flag, NTFS_MFLAG_CASEINS);
  337         vfs_flagopt(mp->mnt_optnew,
  338             "allnames", &ntmp->ntm_flag, NTFS_MFLAG_ALLNAMES);
  339         ntmp->ntm_cp = cp;
  340         ntmp->ntm_bo = &devvp->v_bufobj;
  341 
  342         cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error);
  343         if (error && error != ENOENT)
  344                 goto out;
  345         cs_ntfs = vfs_getopts(mp->mnt_optnew, "cs_ntfs", &error);
  346         if (error && error != ENOENT)
  347                 goto out;
  348         /* Copy in the 8-bit to Unicode conversion table */
  349         /* Initialize Unicode to 8-bit table from 8toU table */
  350         ntfs_82u_init(ntmp, cs_local, cs_ntfs);
  351         if (cs_local != NULL && cs_ntfs != NULL)
  352                 ntfs_u28_init(ntmp, NULL, cs_local, cs_ntfs);
  353         else
  354                 ntfs_u28_init(ntmp, ntmp->ntm_82u, cs_local, cs_ntfs);
  355 
  356         mp->mnt_data = ntmp;
  357 
  358         dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n",
  359                 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.",
  360                 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"",
  361                 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode));
  362 
  363         /*
  364          * We read in some system nodes to do not allow 
  365          * reclaim them and to have everytime access to them.
  366          */ 
  367         {
  368                 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO };
  369                 for (i=0; i<3; i++) {
  370                         error = VFS_VGET(mp, pi[i], LK_EXCLUSIVE,
  371                                          &(ntmp->ntm_sysvn[pi[i]]));
  372                         if(error)
  373                                 goto out1;
  374                         ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM;
  375                         VREF(ntmp->ntm_sysvn[pi[i]]);
  376                         vput(ntmp->ntm_sysvn[pi[i]]);
  377                 }
  378         }
  379 
  380         /* read the Unicode lowercase --> uppercase translation table,
  381          * if necessary */
  382         if ((error = ntfs_toupper_use(mp, ntmp)))
  383                 goto out1;
  384 
  385         /*
  386          * Scan $BitMap and count free clusters
  387          */
  388         error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree);
  389         if(error)
  390                 goto out1;
  391 
  392         /*
  393          * Read and translate to internal format attribute
  394          * definition file. 
  395          */
  396         {
  397                 int num,j;
  398                 struct attrdef ad;
  399 
  400                 /* Open $AttrDef */
  401                 error = VFS_VGET(mp, NTFS_ATTRDEFINO, LK_EXCLUSIVE, &vp );
  402                 if(error) 
  403                         goto out1;
  404 
  405                 /* Count valid entries */
  406                 for(num=0;;num++) {
  407                         error = ntfs_readattr(ntmp, VTONT(vp),
  408                                         NTFS_A_DATA, NULL,
  409                                         num * sizeof(ad), sizeof(ad),
  410                                         &ad, NULL);
  411                         if (error)
  412                                 goto out1;
  413                         if (ad.ad_name[0] == 0)
  414                                 break;
  415                 }
  416 
  417                 /* Alloc memory for attribute definitions */
  418                 ntmp->ntm_ad = malloc(num * sizeof(struct ntvattrdef),
  419                         M_NTFSMNT, M_WAITOK);
  420 
  421                 ntmp->ntm_adnum = num;
  422 
  423                 /* Read them and translate */
  424                 for(i=0;i<num;i++){
  425                         error = ntfs_readattr(ntmp, VTONT(vp),
  426                                         NTFS_A_DATA, NULL,
  427                                         i * sizeof(ad), sizeof(ad),
  428                                         &ad, NULL);
  429                         if (error)
  430                                 goto out1;
  431                         j = 0;
  432                         do {
  433                                 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j];
  434                         } while(ad.ad_name[j++]);
  435                         ntmp->ntm_ad[i].ad_namelen = j - 1;
  436                         ntmp->ntm_ad[i].ad_type = ad.ad_type;
  437                 }
  438 
  439                 vput(vp);
  440         }
  441 
  442         mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
  443         mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
  444         mp->mnt_maxsymlinklen = 0;
  445         MNT_ILOCK(mp);
  446         mp->mnt_flag |= MNT_LOCAL;
  447         MNT_IUNLOCK(mp);
  448         return (0);
  449 
  450 out1:
  451         for(i=0;i<NTFS_SYSNODESNUM;i++)
  452                 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
  453 
  454         if (vflush(mp, 0, 0, td))
  455                 dprintf(("ntfs_mountfs: vflush failed\n"));
  456 
  457 out:
  458         if (bp)
  459                 brelse(bp);
  460 
  461         DROP_GIANT();
  462         g_topology_lock();
  463         g_vfs_close(cp);
  464         g_topology_unlock();
  465         PICKUP_GIANT();
  466         
  467         return (error);
  468 }
  469 
  470 static int
  471 ntfs_unmount( 
  472         struct mount *mp,
  473         int mntflags)
  474 {
  475         struct thread *td;
  476         struct ntfsmount *ntmp;
  477         int error, flags, i;
  478 
  479         dprintf(("ntfs_unmount: unmounting...\n"));
  480         td = curthread;
  481         ntmp = VFSTONTFS(mp);
  482 
  483         flags = 0;
  484         if(mntflags & MNT_FORCE)
  485                 flags |= FORCECLOSE;
  486 
  487         dprintf(("ntfs_unmount: vflushing...\n"));
  488         error = vflush(mp, 0, flags | SKIPSYSTEM, td);
  489         if (error) {
  490                 printf("ntfs_unmount: vflush failed: %d\n",error);
  491                 return (error);
  492         }
  493 
  494         /* Check if only system vnodes are rest */
  495         for(i=0;i<NTFS_SYSNODESNUM;i++)
  496                  if((ntmp->ntm_sysvn[i]) && 
  497                     (vrefcnt(ntmp->ntm_sysvn[i]) > 1)) return (EBUSY);
  498 
  499         /* Dereference all system vnodes */
  500         for(i=0;i<NTFS_SYSNODESNUM;i++)
  501                  if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
  502 
  503         /* vflush system vnodes */
  504         error = vflush(mp, 0, flags, td);
  505         if (error)
  506                 printf("ntfs_unmount: vflush failed(sysnodes): %d\n",error);
  507 
  508         vinvalbuf(ntmp->ntm_devvp, V_SAVE, 0, 0);
  509 
  510         DROP_GIANT();
  511         g_topology_lock();
  512         g_vfs_close(ntmp->ntm_cp);
  513         g_topology_unlock();
  514         PICKUP_GIANT();
  515 
  516         vrele(ntmp->ntm_devvp);
  517 
  518         /* free the toupper table, if this has been last mounted ntfs volume */
  519         ntfs_toupper_unuse();
  520 
  521         dprintf(("ntfs_umount: freeing memory...\n"));
  522         ntfs_u28_uninit(ntmp);
  523         ntfs_82u_uninit(ntmp);
  524         mp->mnt_data = NULL;
  525         MNT_ILOCK(mp);
  526         mp->mnt_flag &= ~MNT_LOCAL;
  527         MNT_IUNLOCK(mp);
  528         free(ntmp->ntm_ad, M_NTFSMNT);
  529         free(ntmp, M_NTFSMNT);
  530         return (error);
  531 }
  532 
  533 static int
  534 ntfs_root(
  535         struct mount *mp,
  536         int flags,
  537         struct vnode **vpp)
  538 {
  539         struct vnode *nvp;
  540         int error = 0;
  541 
  542         dprintf(("ntfs_root(): sysvn: %p\n",
  543                 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO]));
  544         error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, LK_EXCLUSIVE, &nvp);
  545         if(error) {
  546                 printf("ntfs_root: VFS_VGET failed: %d\n",error);
  547                 return (error);
  548         }
  549 
  550         *vpp = nvp;
  551         return (0);
  552 }
  553 
  554 static int
  555 ntfs_calccfree(
  556         struct ntfsmount *ntmp,
  557         cn_t *cfreep)
  558 {
  559         struct vnode *vp;
  560         u_int8_t *tmp;
  561         int j, error;
  562         long cfree = 0;
  563         size_t bmsize, i;
  564 
  565         vp = ntmp->ntm_sysvn[NTFS_BITMAPINO];
  566 
  567         bmsize = VTOF(vp)->f_size;
  568 
  569         tmp = malloc(bmsize, M_TEMP, M_WAITOK);
  570 
  571         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  572                                0, bmsize, tmp, NULL);
  573         if (error)
  574                 goto out;
  575 
  576         for(i=0;i<bmsize;i++)
  577                 for(j=0;j<8;j++)
  578                         if(~tmp[i] & (1 << j)) cfree++;
  579         *cfreep = cfree;
  580 
  581     out:
  582         free(tmp, M_TEMP);
  583         return(error);
  584 }
  585 
  586 static int
  587 ntfs_statfs(
  588         struct mount *mp,
  589         struct statfs *sbp)
  590 {
  591         struct ntfsmount *ntmp = VFSTONTFS(mp);
  592         u_int64_t mftsize,mftallocated;
  593 
  594         dprintf(("ntfs_statfs():\n"));
  595 
  596         mftsize = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_size;
  597         mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated;
  598 
  599         sbp->f_type = mp->mnt_vfc->vfc_typenum;
  600         sbp->f_bsize = ntmp->ntm_bps;
  601         sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc;
  602         sbp->f_blocks = ntmp->ntm_bootfile.bf_spv;
  603         sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree);
  604         sbp->f_ffree = sbp->f_bfree / ntmp->ntm_bpmftrec;
  605         sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) +
  606                        sbp->f_ffree;
  607         sbp->f_flags = mp->mnt_flag;
  608 
  609         return (0);
  610 }
  611 
  612 /*ARGSUSED*/
  613 static int
  614 ntfs_fhtovp(
  615         struct mount *mp,
  616         struct fid *fhp,
  617         struct vnode **vpp)
  618 {
  619         struct vnode *nvp;
  620         struct ntfid *ntfhp = (struct ntfid *)fhp;
  621         int error;
  622 
  623         ddprintf(("ntfs_fhtovp(): %d\n", ntfhp->ntfid_ino));
  624 
  625         if ((error = VFS_VGET(mp, ntfhp->ntfid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
  626                 *vpp = NULLVP;
  627                 return (error);
  628         }
  629         /* XXX as unlink/rmdir/mkdir/creat are not currently possible
  630          * with NTFS, we don't need to check anything else for now */
  631         *vpp = nvp;
  632         vnode_create_vobject(nvp, VTOF(nvp)->f_size, curthread);
  633         return (0);
  634 }
  635 
  636 int
  637 ntfs_vgetex(
  638         struct mount *mp,
  639         ino_t ino,
  640         u_int32_t attrtype,
  641         char *attrname,
  642         u_long lkflags,
  643         u_long flags,
  644         struct thread *td,
  645         struct vnode **vpp) 
  646 {
  647         int error;
  648         register struct ntfsmount *ntmp;
  649         struct ntnode *ip;
  650         struct fnode *fp;
  651         struct vnode *vp;
  652         enum vtype f_type;
  653 
  654         dprintf(("ntfs_vgetex: ino: %d, attr: 0x%x:%s, lkf: 0x%lx, f: 0x%lx\n",
  655                 ino, attrtype, attrname?attrname:"", (u_long)lkflags,
  656                 (u_long)flags));
  657 
  658         ntmp = VFSTONTFS(mp);
  659         *vpp = NULL;
  660 
  661         /* Get ntnode */
  662         error = ntfs_ntlookup(ntmp, ino, &ip);
  663         if (error) {
  664                 printf("ntfs_vget: ntfs_ntget failed\n");
  665                 return (error);
  666         }
  667 
  668         /* It may be not initialized fully, so force load it */
  669         if (!(flags & VG_DONTLOADIN) && !(ip->i_flag & IN_LOADED)) {
  670                 error = ntfs_loadntnode(ntmp, ip);
  671                 if(error) {
  672                         printf("ntfs_vget: CAN'T LOAD ATTRIBUTES FOR INO: %d\n",
  673                                ip->i_number);
  674                         ntfs_ntput(ip);
  675                         return (error);
  676                 }
  677         }
  678 
  679         error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp);
  680         if (error) {
  681                 printf("ntfs_vget: ntfs_fget failed\n");
  682                 ntfs_ntput(ip);
  683                 return (error);
  684         }
  685 
  686         f_type = VNON;
  687         if (!(flags & VG_DONTVALIDFN) && !(fp->f_flag & FN_VALID)) {
  688                 if ((ip->i_frflag & NTFS_FRFLAG_DIR) &&
  689                     (fp->f_attrtype == NTFS_A_DATA && fp->f_attrname == NULL)) {
  690                         f_type = VDIR;
  691                 } else if (flags & VG_EXT) {
  692                         f_type = VNON;
  693                         fp->f_size = fp->f_allocated = 0;
  694                 } else {
  695                         f_type = VREG;  
  696 
  697                         error = ntfs_filesize(ntmp, fp, 
  698                                               &fp->f_size, &fp->f_allocated);
  699                         if (error) {
  700                                 ntfs_ntput(ip);
  701                                 return (error);
  702                         }
  703                 }
  704 
  705                 fp->f_flag |= FN_VALID;
  706         }
  707 
  708         if (FTOV(fp)) {
  709                 vget(FTOV(fp), lkflags, td);
  710                 *vpp = FTOV(fp);
  711                 ntfs_ntput(ip);
  712                 return (0);
  713         }
  714 
  715         error = getnewvnode("ntfs", ntmp->ntm_mountp, &ntfs_vnodeops, &vp);
  716         if(error) {
  717                 ntfs_frele(fp);
  718                 ntfs_ntput(ip);
  719                 return (error);
  720         }
  721         /* XXX: Too early for mpsafe fs, lacks vnode lock */
  722         error = insmntque(vp, ntmp->ntm_mountp);
  723         if (error) {
  724                 ntfs_frele(fp);
  725                 ntfs_ntput(ip);
  726                 return (error);
  727         }
  728         dprintf(("ntfs_vget: vnode: %p for ntnode: %d\n", vp,ino));
  729 
  730         fp->f_vp = vp;
  731         vp->v_data = fp;
  732         vp->v_type = f_type;
  733 
  734         vp->v_bufobj.bo_ops = &ntfs_vnbufops;
  735         vp->v_bufobj.bo_private = vp;
  736 
  737         if (ino == NTFS_ROOTINO)
  738                 vp->v_vflag |= VV_ROOT;
  739 
  740         ntfs_ntput(ip);
  741 
  742         if (lkflags & LK_TYPE_MASK) {
  743                 error = vn_lock(vp, lkflags);
  744                 if (error) {
  745                         vput(vp);
  746                         return (error);
  747                 }
  748         }
  749 
  750         *vpp = vp;
  751         return (0);
  752         
  753 }
  754 
  755 static int
  756 ntfs_vget(
  757         struct mount *mp,
  758         ino_t ino,
  759         int lkflags,
  760         struct vnode **vpp) 
  761 {
  762         return ntfs_vgetex(mp, ino, NTFS_A_DATA, NULL, lkflags, 0,
  763             curthread, vpp);
  764 }
  765 
  766 static void
  767 ntfs_bufstrategy(struct bufobj *bo, struct buf *bp)
  768 {
  769         struct vnode *vp;
  770         int rc;
  771 
  772         vp = bo->bo_private;
  773         KASSERT(bo == &vp->v_bufobj, ("BO/VP mismatch: vp %p bo %p != %p",
  774             vp, &vp->v_bufobj, bo));
  775         rc = VOP_STRATEGY(vp, bp);
  776         KASSERT(rc == 0, ("NTFS VOP_STRATEGY failed: bp=%p, "
  777                 "vp=%p, rc=%d", bp, vp, rc));
  778 }
  779 
  780 static struct vfsops ntfs_vfsops = {
  781         .vfs_fhtovp =   ntfs_fhtovp,
  782         .vfs_init =     ntfs_init,
  783         .vfs_cmount =   ntfs_cmount,
  784         .vfs_mount =    ntfs_mount,
  785         .vfs_root =     ntfs_root,
  786         .vfs_statfs =   ntfs_statfs,
  787         .vfs_uninit =   ntfs_uninit,
  788         .vfs_unmount =  ntfs_unmount,
  789         .vfs_vget =     ntfs_vget,
  790 };
  791 VFS_SET(ntfs_vfsops, ntfs, 0);
  792 MODULE_VERSION(ntfs, 1);

Cache object: 6da4f393f7d0f9ad1e857394c8e31288


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