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: releng/5.2/sys/fs/ntfs/ntfs_vfsops.c 120492 2003-09-26 20:26:25Z fjoe $
   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/systm.h>
   45 
   46 #include <vm/vm.h>
   47 #include <vm/vm_param.h>
   48 #include <vm/vm_page.h>
   49 #include <vm/vm_object.h>
   50 #include <vm/vm_extern.h>
   51 
   52 /*#define NTFS_DEBUG 1*/
   53 #include <fs/ntfs/ntfs.h>
   54 #include <fs/ntfs/ntfs_inode.h>
   55 #include <fs/ntfs/ntfs_subr.h>
   56 #include <fs/ntfs/ntfs_vfsops.h>
   57 #include <fs/ntfs/ntfs_ihash.h>
   58 #include <fs/ntfs/ntfsmount.h>
   59 
   60 MALLOC_DEFINE(M_NTFSMNT, "NTFS mount", "NTFS mount structure");
   61 MALLOC_DEFINE(M_NTFSNTNODE,"NTFS ntnode",  "NTFS ntnode information");
   62 MALLOC_DEFINE(M_NTFSFNODE,"NTFS fnode",  "NTFS fnode information");
   63 MALLOC_DEFINE(M_NTFSDIR,"NTFS dir",  "NTFS dir buffer");
   64 
   65 struct sockaddr;
   66 
   67 static int      ntfs_mountfs(register struct vnode *, struct mount *, 
   68                                   struct ntfs_args *, struct thread *);
   69 
   70 static vfs_init_t       ntfs_init;
   71 static vfs_uninit_t     ntfs_uninit;
   72 static vfs_vget_t       ntfs_vget;
   73 static vfs_fhtovp_t     ntfs_fhtovp;
   74 static vfs_mount_t      ntfs_mount;
   75 static vfs_root_t       ntfs_root;
   76 static vfs_statfs_t     ntfs_statfs;
   77 static vfs_unmount_t    ntfs_unmount;
   78 static vfs_vptofh_t     ntfs_vptofh;
   79 
   80 static int
   81 ntfs_init (
   82         struct vfsconf *vcp )
   83 {
   84         ntfs_nthashinit();
   85         ntfs_toupper_init();
   86         return 0;
   87 }
   88 
   89 static int
   90 ntfs_uninit (
   91         struct vfsconf *vcp )
   92 {
   93         ntfs_toupper_destroy();
   94         ntfs_nthashdestroy();
   95         return 0;
   96 }
   97 
   98 static int
   99 ntfs_mount ( 
  100         struct mount *mp,
  101         char *path,
  102         caddr_t data,
  103         struct nameidata *ndp,
  104         struct thread *td )
  105 {
  106         size_t          size;
  107         int             err = 0;
  108         struct vnode    *devvp;
  109         struct ntfs_args args;
  110 
  111         /*
  112          * Use NULL path to flag a root mount
  113          */
  114         if( path == NULL) {
  115                 /*
  116                  ***
  117                  * Mounting root filesystem
  118                  ***
  119                  */
  120         
  121                 /* Get vnode for root device*/
  122                 if( bdevvp( rootdev, &rootvp))
  123                         panic("ntfs_mountroot: can't setup bdevvp for root");
  124 
  125                 /*
  126                  * FS specific handling
  127                  */
  128                 mp->mnt_flag |= MNT_RDONLY;     /* XXX globally applicable?*/
  129 
  130                 /*
  131                  * Attempt mount
  132                  */
  133                 if( ( err = ntfs_mountfs(rootvp, mp, &args, td)) != 0) {
  134                         /* fs specific cleanup (if any)*/
  135                         goto error_1;
  136                 }
  137 
  138                 goto dostatfs;          /* success*/
  139 
  140         }
  141 
  142         /*
  143          ***
  144          * Mounting non-root filesystem or updating a filesystem
  145          ***
  146          */
  147 
  148         /* copy in user arguments*/
  149         err = copyin(data, (caddr_t)&args, sizeof (struct ntfs_args));
  150         if (err)
  151                 goto error_1;           /* can't get arguments*/
  152 
  153         /*
  154          * If updating, check whether changing from read-only to
  155          * read/write; if there is no device name, that's all we do.
  156          */
  157         if (mp->mnt_flag & MNT_UPDATE) {
  158                 /* if not updating name...*/
  159                 if (args.fspec == 0) {
  160                         /*
  161                          * Process export requests.  Jumping to "success"
  162                          * will return the vfs_export() error code.
  163                          */
  164                         err = vfs_export(mp, &args.export);
  165                         goto success;
  166                 }
  167 
  168                 printf("ntfs_mount(): MNT_UPDATE not supported\n");
  169                 err = EINVAL;
  170                 goto error_1;
  171         }
  172 
  173         /*
  174          * Not an update, or updating the name: look up the name
  175          * and verify that it refers to a sensible block device.
  176          */
  177         NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, td);
  178         err = namei(ndp);
  179         if (err) {
  180                 /* can't get devvp!*/
  181                 goto error_1;
  182         }
  183         NDFREE(ndp, NDF_ONLY_PNBUF);
  184         devvp = ndp->ni_vp;
  185 
  186         if (!vn_isdisk(devvp, &err)) 
  187                 goto error_2;
  188         if (mp->mnt_flag & MNT_UPDATE) {
  189 #if 0
  190                 /*
  191                  ********************
  192                  * UPDATE
  193                  ********************
  194                  */
  195 
  196                 if (devvp != ntmp->um_devvp)
  197                         err = EINVAL;   /* needs translation */
  198                 else
  199                         vrele(devvp);
  200                 /*
  201                  * Update device name only on success
  202                  */
  203                 if( !err) {
  204                         /* Save "mounted from" info for mount point (NULL pad)*/
  205                         copyinstr(      args.fspec,
  206                                         mp->mnt_stat.f_mntfromname,
  207                                         MNAMELEN - 1,
  208                                         &size);
  209                         bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
  210                 }
  211 #endif
  212         } else {
  213                 /*
  214                  ********************
  215                  * NEW MOUNT
  216                  ********************
  217                  */
  218 
  219                 /*
  220                  * Since this is a new mount, we want the names for
  221                  * the device and the mount point copied in.  If an
  222                  * error occurs, the mountpoint is discarded by the
  223                  * upper level code.  Note that vfs_mount() handles
  224                  * copying the mountpoint f_mntonname for us, so we
  225                  * don't have to do it here unless we want to set it
  226                  * to something other than "path" for some rason.
  227                  */
  228                 /* Save "mounted from" info for mount point (NULL pad)*/
  229                 copyinstr(      args.fspec,                     /* device name*/
  230                                 mp->mnt_stat.f_mntfromname,     /* save area*/
  231                                 MNAMELEN - 1,                   /* max size*/
  232                                 &size);                         /* real size*/
  233                 bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
  234 
  235                 err = ntfs_mountfs(devvp, mp, &args, td);
  236         }
  237         if (err) {
  238                 goto error_2;
  239         }
  240 
  241 dostatfs:
  242         /*
  243          * Initialize FS stat information in mount struct; uses both
  244          * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
  245          *
  246          * This code is common to root and non-root mounts
  247          */
  248         (void)VFS_STATFS(mp, &mp->mnt_stat, td);
  249 
  250         goto success;
  251 
  252 
  253 error_2:        /* error with devvp held*/
  254 
  255         /* release devvp before failing*/
  256         vrele(devvp);
  257 
  258 error_1:        /* no state to back out*/
  259 
  260 success:
  261         return(err);
  262 }
  263 
  264 /*
  265  * Common code for mount and mountroot
  266  */
  267 int
  268 ntfs_mountfs(devvp, mp, argsp, td)
  269         register struct vnode *devvp;
  270         struct mount *mp;
  271         struct ntfs_args *argsp;
  272         struct thread *td;
  273 {
  274         struct buf *bp;
  275         struct ntfsmount *ntmp;
  276         dev_t dev = devvp->v_rdev;
  277         int error, ronly, ncount, i;
  278         struct vnode *vp;
  279 
  280         /*
  281          * Disallow multiple mounts of the same device.
  282          * Disallow mounting of a device that is currently in use
  283          * (except for root, which might share swap device for miniroot).
  284          * Flush out any old buffers remaining from a previous use.
  285          */
  286         error = vfs_mountedon(devvp);
  287         if (error)
  288                 return (error);
  289         ncount = vcount(devvp);
  290         if (devvp->v_object)
  291                 ncount -= 1;
  292         if (ncount > 1 && devvp != rootvp)
  293                 return (EBUSY);
  294         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
  295         error = vinvalbuf(devvp, V_SAVE, td->td_ucred, td, 0, 0);
  296         VOP_UNLOCK(devvp, 0, td);
  297         if (error)
  298                 return (error);
  299 
  300         ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
  301         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td);
  302         error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, td, -1);
  303         VOP_UNLOCK(devvp, 0, td);
  304         if (error)
  305                 return (error);
  306 
  307         bp = NULL;
  308 
  309         error = bread(devvp, BBLOCK, BBSIZE, NOCRED, &bp);
  310         if (error)
  311                 goto out;
  312         ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK | M_ZERO);
  313         bcopy( bp->b_data, &ntmp->ntm_bootfile, sizeof(struct bootfile) );
  314         /*
  315          * We must not cache the boot block if its size is not exactly
  316          * one cluster in order to avoid confusing the buffer cache when
  317          * the boot file is read later by ntfs_readntvattr_plain(), which
  318          * reads a cluster at a time.
  319          */
  320         if (ntfs_cntob(1) != BBSIZE)
  321                 bp->b_flags |= B_NOCACHE;
  322         brelse( bp );
  323         bp = NULL;
  324 
  325         if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) {
  326                 error = EINVAL;
  327                 dprintf(("ntfs_mountfs: invalid boot block\n"));
  328                 goto out;
  329         }
  330 
  331         {
  332                 int8_t cpr = ntmp->ntm_mftrecsz;
  333                 if( cpr > 0 )
  334                         ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr;
  335                 else
  336                         ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps;
  337         }
  338         dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
  339                 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media,
  340                 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec));
  341         dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n",
  342                 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn));
  343 
  344         ntmp->ntm_mountp = mp;
  345         ntmp->ntm_dev = dev;
  346         ntmp->ntm_devvp = devvp;
  347         ntmp->ntm_uid = argsp->uid;
  348         ntmp->ntm_gid = argsp->gid;
  349         ntmp->ntm_mode = argsp->mode;
  350         ntmp->ntm_flag = argsp->flag;
  351 
  352         /* Copy in the 8-bit to Unicode conversion table */
  353         /* Initialize Unicode to 8-bit table from 8toU table */
  354         if (argsp->flag & NTFS_MFLAG_KICONV) {
  355                 ntfs_82u_init(ntmp, argsp->cs_local, argsp->cs_ntfs);
  356                 ntfs_u28_init(ntmp, NULL, argsp->cs_local, argsp->cs_ntfs);
  357         } else {
  358                 ntfs_82u_init(ntmp, NULL, NULL);
  359                 ntfs_u28_init(ntmp, ntmp->ntm_82u, NULL, NULL);
  360         }
  361 
  362         mp->mnt_data = (qaddr_t)ntmp;
  363 
  364         dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n",
  365                 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.",
  366                 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"",
  367                 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode));
  368 
  369         /*
  370          * We read in some system nodes to do not allow 
  371          * reclaim them and to have everytime access to them.
  372          */ 
  373         {
  374                 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO };
  375                 for (i=0; i<3; i++) {
  376                         error = VFS_VGET(mp, pi[i], LK_EXCLUSIVE,
  377                                          &(ntmp->ntm_sysvn[pi[i]]));
  378                         if(error)
  379                                 goto out1;
  380                         ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM;
  381                         VREF(ntmp->ntm_sysvn[pi[i]]);
  382                         vput(ntmp->ntm_sysvn[pi[i]]);
  383                 }
  384         }
  385 
  386         /* read the Unicode lowercase --> uppercase translation table,
  387          * if necessary */
  388         if ((error = ntfs_toupper_use(mp, ntmp)))
  389                 goto out1;
  390 
  391         /*
  392          * Scan $BitMap and count free clusters
  393          */
  394         error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree);
  395         if(error)
  396                 goto out1;
  397 
  398         /*
  399          * Read and translate to internal format attribute
  400          * definition file. 
  401          */
  402         {
  403                 int num,j;
  404                 struct attrdef ad;
  405 
  406                 /* Open $AttrDef */
  407                 error = VFS_VGET(mp, NTFS_ATTRDEFINO, LK_EXCLUSIVE, &vp );
  408                 if(error) 
  409                         goto out1;
  410 
  411                 /* Count valid entries */
  412                 for(num=0;;num++) {
  413                         error = ntfs_readattr(ntmp, VTONT(vp),
  414                                         NTFS_A_DATA, NULL,
  415                                         num * sizeof(ad), sizeof(ad),
  416                                         &ad, NULL);
  417                         if (error)
  418                                 goto out1;
  419                         if (ad.ad_name[0] == 0)
  420                                 break;
  421                 }
  422 
  423                 /* Alloc memory for attribute definitions */
  424                 MALLOC(ntmp->ntm_ad, struct ntvattrdef *,
  425                         num * sizeof(struct ntvattrdef),
  426                         M_NTFSMNT, M_WAITOK);
  427 
  428                 ntmp->ntm_adnum = num;
  429 
  430                 /* Read them and translate */
  431                 for(i=0;i<num;i++){
  432                         error = ntfs_readattr(ntmp, VTONT(vp),
  433                                         NTFS_A_DATA, NULL,
  434                                         i * sizeof(ad), sizeof(ad),
  435                                         &ad, NULL);
  436                         if (error)
  437                                 goto out1;
  438                         j = 0;
  439                         do {
  440                                 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j];
  441                         } while(ad.ad_name[j++]);
  442                         ntmp->ntm_ad[i].ad_namelen = j - 1;
  443                         ntmp->ntm_ad[i].ad_type = ad.ad_type;
  444                 }
  445 
  446                 vput(vp);
  447         }
  448 
  449         mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
  450         mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
  451         mp->mnt_maxsymlinklen = 0;
  452         mp->mnt_flag |= MNT_LOCAL;
  453         devvp->v_rdev->si_mountpoint = mp;
  454         return (0);
  455 
  456 out1:
  457         for(i=0;i<NTFS_SYSNODESNUM;i++)
  458                 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
  459 
  460         if (vflush(mp, 0, 0))
  461                 dprintf(("ntfs_mountfs: vflush failed\n"));
  462 
  463 out:
  464         devvp->v_rdev->si_mountpoint = NULL;
  465         if (bp)
  466                 brelse(bp);
  467 
  468         (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, td);
  469         
  470         return (error);
  471 }
  472 
  473 static int
  474 ntfs_unmount( 
  475         struct mount *mp,
  476         int mntflags,
  477         struct thread *td)
  478 {
  479         struct ntfsmount *ntmp;
  480         int error, ronly, flags, i;
  481 
  482         dprintf(("ntfs_unmount: unmounting...\n"));
  483         ntmp = VFSTONTFS(mp);
  484 
  485         flags = 0;
  486         if(mntflags & MNT_FORCE)
  487                 flags |= FORCECLOSE;
  488 
  489         dprintf(("ntfs_unmount: vflushing...\n"));
  490         error = vflush(mp, 0, flags | SKIPSYSTEM);
  491         if (error) {
  492                 printf("ntfs_unmount: vflush failed: %d\n",error);
  493                 return (error);
  494         }
  495 
  496         /* Check if only system vnodes are rest */
  497         for(i=0;i<NTFS_SYSNODESNUM;i++)
  498                  if((ntmp->ntm_sysvn[i]) && 
  499                     (vrefcnt(ntmp->ntm_sysvn[i]) > 1)) return (EBUSY);
  500 
  501         /* Dereference all system vnodes */
  502         for(i=0;i<NTFS_SYSNODESNUM;i++)
  503                  if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
  504 
  505         /* vflush system vnodes */
  506         error = vflush(mp, 0, flags);
  507         if (error)
  508                 printf("ntfs_unmount: vflush failed(sysnodes): %d\n",error);
  509 
  510         /* Check if the type of device node isn't VBAD before
  511          * touching v_cdev.  If the device vnode is revoked, the
  512          * field is NULL and touching it causes null pointer derefercence.
  513          */
  514         if (ntmp->ntm_devvp->v_type != VBAD)
  515                 ntmp->ntm_devvp->v_rdev->si_mountpoint = NULL;
  516 
  517         vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, td, 0, 0);
  518 
  519         ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
  520         error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE,
  521                 NOCRED, td);
  522 
  523         vrele(ntmp->ntm_devvp);
  524 
  525         /* free the toupper table, if this has been last mounted ntfs volume */
  526         ntfs_toupper_unuse();
  527 
  528         dprintf(("ntfs_umount: freeing memory...\n"));
  529         ntfs_u28_uninit(ntmp);
  530         ntfs_82u_uninit(ntmp);
  531         mp->mnt_data = (qaddr_t)0;
  532         mp->mnt_flag &= ~MNT_LOCAL;
  533         FREE(ntmp->ntm_ad, M_NTFSMNT);
  534         FREE(ntmp, M_NTFSMNT);
  535         return (error);
  536 }
  537 
  538 static int
  539 ntfs_root(
  540         struct mount *mp,
  541         struct vnode **vpp )
  542 {
  543         struct vnode *nvp;
  544         int error = 0;
  545 
  546         dprintf(("ntfs_root(): sysvn: %p\n",
  547                 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO]));
  548         error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, LK_EXCLUSIVE, &nvp);
  549         if(error) {
  550                 printf("ntfs_root: VFS_VGET failed: %d\n",error);
  551                 return (error);
  552         }
  553 
  554         *vpp = nvp;
  555         return (0);
  556 }
  557 
  558 int
  559 ntfs_calccfree(
  560         struct ntfsmount *ntmp,
  561         cn_t *cfreep)
  562 {
  563         struct vnode *vp;
  564         u_int8_t *tmp;
  565         int j, error;
  566         long cfree = 0;
  567         size_t bmsize, i;
  568 
  569         vp = ntmp->ntm_sysvn[NTFS_BITMAPINO];
  570 
  571         bmsize = VTOF(vp)->f_size;
  572 
  573         MALLOC(tmp, u_int8_t *, bmsize, M_TEMP, M_WAITOK);
  574 
  575         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
  576                                0, bmsize, tmp, NULL);
  577         if (error)
  578                 goto out;
  579 
  580         for(i=0;i<bmsize;i++)
  581                 for(j=0;j<8;j++)
  582                         if(~tmp[i] & (1 << j)) cfree++;
  583         *cfreep = cfree;
  584 
  585     out:
  586         FREE(tmp, M_TEMP);
  587         return(error);
  588 }
  589 
  590 static int
  591 ntfs_statfs(
  592         struct mount *mp,
  593         struct statfs *sbp,
  594         struct thread *td)
  595 {
  596         struct ntfsmount *ntmp = VFSTONTFS(mp);
  597         u_int64_t mftsize,mftallocated;
  598 
  599         dprintf(("ntfs_statfs():\n"));
  600 
  601         mftsize = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_size;
  602         mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated;
  603 
  604         sbp->f_type = mp->mnt_vfc->vfc_typenum;
  605         sbp->f_bsize = ntmp->ntm_bps;
  606         sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc;
  607         sbp->f_blocks = ntmp->ntm_bootfile.bf_spv;
  608         sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree);
  609         sbp->f_ffree = sbp->f_bfree / ntmp->ntm_bpmftrec;
  610         sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) +
  611                        sbp->f_ffree;
  612         if (sbp != &mp->mnt_stat) {
  613                 bcopy((caddr_t)mp->mnt_stat.f_mntonname,
  614                         (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
  615                 bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
  616                         (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
  617         }
  618         sbp->f_flags = mp->mnt_flag;
  619 
  620         return (0);
  621 }
  622 
  623 /*ARGSUSED*/
  624 static int
  625 ntfs_fhtovp(
  626         struct mount *mp,
  627         struct fid *fhp,
  628         struct vnode **vpp)
  629 {
  630         struct vnode *nvp;
  631         struct ntfid *ntfhp = (struct ntfid *)fhp;
  632         int error;
  633 
  634         ddprintf(("ntfs_fhtovp(): %d\n", ntfhp->ntfid_ino));
  635 
  636         if ((error = VFS_VGET(mp, ntfhp->ntfid_ino, LK_EXCLUSIVE, &nvp)) != 0) {
  637                 *vpp = NULLVP;
  638                 return (error);
  639         }
  640         /* XXX as unlink/rmdir/mkdir/creat are not currently possible
  641          * with NTFS, we don't need to check anything else for now */
  642         *vpp = nvp;
  643 
  644         return (0);
  645 }
  646 
  647 static int
  648 ntfs_vptofh(
  649         struct vnode *vp,
  650         struct fid *fhp)
  651 {
  652         register struct ntnode *ntp;
  653         register struct ntfid *ntfhp;
  654 
  655         ddprintf(("ntfs_fhtovp(): %p\n", vp));
  656 
  657         ntp = VTONT(vp);
  658         ntfhp = (struct ntfid *)fhp;
  659         ntfhp->ntfid_len = sizeof(struct ntfid);
  660         ntfhp->ntfid_ino = ntp->i_number;
  661         /* ntfhp->ntfid_gen = ntp->i_gen; */
  662         return (0);
  663 }
  664 
  665 int
  666 ntfs_vgetex(
  667         struct mount *mp,
  668         ino_t ino,
  669         u_int32_t attrtype,
  670         char *attrname,
  671         u_long lkflags,
  672         u_long flags,
  673         struct thread *td,
  674         struct vnode **vpp) 
  675 {
  676         int error;
  677         register struct ntfsmount *ntmp;
  678         struct ntnode *ip;
  679         struct fnode *fp;
  680         struct vnode *vp;
  681         enum vtype f_type;
  682 
  683         dprintf(("ntfs_vgetex: ino: %d, attr: 0x%x:%s, lkf: 0x%lx, f: 0x%lx\n",
  684                 ino, attrtype, attrname?attrname:"", (u_long)lkflags,
  685                 (u_long)flags ));
  686 
  687         ntmp = VFSTONTFS(mp);
  688         *vpp = NULL;
  689 
  690         /* Get ntnode */
  691         error = ntfs_ntlookup(ntmp, ino, &ip);
  692         if (error) {
  693                 printf("ntfs_vget: ntfs_ntget failed\n");
  694                 return (error);
  695         }
  696 
  697         /* It may be not initialized fully, so force load it */
  698         if (!(flags & VG_DONTLOADIN) && !(ip->i_flag & IN_LOADED)) {
  699                 error = ntfs_loadntnode(ntmp, ip);
  700                 if(error) {
  701                         printf("ntfs_vget: CAN'T LOAD ATTRIBUTES FOR INO: %d\n",
  702                                ip->i_number);
  703                         ntfs_ntput(ip);
  704                         return (error);
  705                 }
  706         }
  707 
  708         error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp);
  709         if (error) {
  710                 printf("ntfs_vget: ntfs_fget failed\n");
  711                 ntfs_ntput(ip);
  712                 return (error);
  713         }
  714 
  715         f_type = VNON;
  716         if (!(flags & VG_DONTVALIDFN) && !(fp->f_flag & FN_VALID)) {
  717                 if ((ip->i_frflag & NTFS_FRFLAG_DIR) &&
  718                     (fp->f_attrtype == NTFS_A_DATA && fp->f_attrname == NULL)) {
  719                         f_type = VDIR;
  720                 } else if (flags & VG_EXT) {
  721                         f_type = VNON;
  722                         fp->f_size = fp->f_allocated = 0;
  723                 } else {
  724                         f_type = VREG;  
  725 
  726                         error = ntfs_filesize(ntmp, fp, 
  727                                               &fp->f_size, &fp->f_allocated);
  728                         if (error) {
  729                                 ntfs_ntput(ip);
  730                                 return (error);
  731                         }
  732                 }
  733 
  734                 fp->f_flag |= FN_VALID;
  735         }
  736 
  737         if (FTOV(fp)) {
  738                 vget(FTOV(fp), lkflags, td);
  739                 *vpp = FTOV(fp);
  740                 ntfs_ntput(ip);
  741                 return (0);
  742         }
  743 
  744         error = getnewvnode("ntfs", ntmp->ntm_mountp, ntfs_vnodeop_p, &vp);
  745         if(error) {
  746                 ntfs_frele(fp);
  747                 ntfs_ntput(ip);
  748                 return (error);
  749         }
  750         dprintf(("ntfs_vget: vnode: %p for ntnode: %d\n", vp,ino));
  751 
  752         fp->f_vp = vp;
  753         vp->v_data = fp;
  754         vp->v_type = f_type;
  755 
  756         if (ino == NTFS_ROOTINO)
  757                 vp->v_vflag |= VV_ROOT;
  758 
  759         ntfs_ntput(ip);
  760 
  761         if (lkflags & LK_TYPE_MASK) {
  762                 error = vn_lock(vp, lkflags, td);
  763                 if (error) {
  764                         vput(vp);
  765                         return (error);
  766                 }
  767         }
  768 
  769         *vpp = vp;
  770         return (0);
  771         
  772 }
  773 
  774 static int
  775 ntfs_vget(
  776         struct mount *mp,
  777         ino_t ino,
  778         int lkflags,
  779         struct vnode **vpp) 
  780 {
  781         return ntfs_vgetex(mp, ino, NTFS_A_DATA, NULL, lkflags, 0,
  782             curthread, vpp);
  783 }
  784 
  785 static struct vfsops ntfs_vfsops = {
  786         .vfs_fhtovp =   ntfs_fhtovp,
  787         .vfs_init =     ntfs_init,
  788         .vfs_mount =    ntfs_mount,
  789         .vfs_root =     ntfs_root,
  790         .vfs_statfs =   ntfs_statfs,
  791         .vfs_uninit =   ntfs_uninit,
  792         .vfs_unmount =  ntfs_unmount,
  793         .vfs_vget =     ntfs_vget,
  794         .vfs_vptofh =   ntfs_vptofh,
  795 };
  796 VFS_SET(ntfs_vfsops, ntfs, 0);
  797 MODULE_VERSION(ntfs, 1);

Cache object: 7e6d20ecc8b779d9c85a1717ba48e1f0


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