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/9.0/sys/fs/ntfs/ntfs_vfsops.c 222167 2011-05-22 01:07:54Z rmacklem $
   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         ntmp->ntm_multiplier = ntmp->ntm_bps / DEV_BSIZE;
  322 
  323         dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
  324                 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media,
  325                 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec));
  326         dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n",
  327                 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn));
  328 
  329         ntmp->ntm_mountp = mp;
  330         ntmp->ntm_devvp = devvp;
  331         if (1 == vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v))
  332                 ntmp->ntm_uid = v;
  333         if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v))
  334                 ntmp->ntm_gid = v;
  335         if (1 == vfs_scanopt(mp->mnt_optnew, "mode", "%d", &v))
  336                 ntmp->ntm_mode = v & ACCESSPERMS;
  337         vfs_flagopt(mp->mnt_optnew,
  338             "caseins", &ntmp->ntm_flag, NTFS_MFLAG_CASEINS);
  339         vfs_flagopt(mp->mnt_optnew,
  340             "allnames", &ntmp->ntm_flag, NTFS_MFLAG_ALLNAMES);
  341         ntmp->ntm_cp = cp;
  342         ntmp->ntm_bo = &devvp->v_bufobj;
  343 
  344         cs_local = vfs_getopts(mp->mnt_optnew, "cs_local", &error);
  345         if (error && error != ENOENT)
  346                 goto out;
  347         cs_ntfs = vfs_getopts(mp->mnt_optnew, "cs_ntfs", &error);
  348         if (error && error != ENOENT)
  349                 goto out;
  350         /* Copy in the 8-bit to Unicode conversion table */
  351         /* Initialize Unicode to 8-bit table from 8toU table */
  352         ntfs_82u_init(ntmp, cs_local, cs_ntfs);
  353         if (cs_local != NULL && cs_ntfs != NULL)
  354                 ntfs_u28_init(ntmp, NULL, cs_local, cs_ntfs);
  355         else
  356                 ntfs_u28_init(ntmp, ntmp->ntm_82u, cs_local, cs_ntfs);
  357 
  358         mp->mnt_data = ntmp;
  359 
  360         dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n",
  361                 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.",
  362                 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"",
  363                 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode));
  364 
  365         /*
  366          * We read in some system nodes to do not allow 
  367          * reclaim them and to have everytime access to them.
  368          */ 
  369         {
  370                 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO };
  371                 for (i=0; i<3; i++) {
  372                         error = VFS_VGET(mp, pi[i], LK_EXCLUSIVE,
  373                                          &(ntmp->ntm_sysvn[pi[i]]));
  374                         if(error)
  375                                 goto out1;
  376                         ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM;
  377                         VREF(ntmp->ntm_sysvn[pi[i]]);
  378                         vput(ntmp->ntm_sysvn[pi[i]]);
  379                 }
  380         }
  381 
  382         /* read the Unicode lowercase --> uppercase translation table,
  383          * if necessary */
  384         if ((error = ntfs_toupper_use(mp, ntmp)))
  385                 goto out1;
  386 
  387         /*
  388          * Scan $BitMap and count free clusters
  389          */
  390         error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree);
  391         if(error)
  392                 goto out1;
  393 
  394         /*
  395          * Read and translate to internal format attribute
  396          * definition file. 
  397          */
  398         {
  399                 int num,j;
  400                 struct attrdef ad;
  401 
  402                 /* Open $AttrDef */
  403                 error = VFS_VGET(mp, NTFS_ATTRDEFINO, LK_EXCLUSIVE, &vp );
  404                 if(error) 
  405                         goto out1;
  406 
  407                 /* Count valid entries */
  408                 for(num=0;;num++) {
  409                         error = ntfs_readattr(ntmp, VTONT(vp),
  410                                         NTFS_A_DATA, NULL,
  411                                         num * sizeof(ad), sizeof(ad),
  412                                         &ad, NULL);
  413                         if (error)
  414                                 goto out1;
  415                         if (ad.ad_name[0] == 0)
  416                                 break;
  417                 }
  418 
  419                 /* Alloc memory for attribute definitions */
  420                 ntmp->ntm_ad = malloc(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);
  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 {
  477         struct thread *td;
  478         struct ntfsmount *ntmp;
  479         int error, flags, i;
  480 
  481         dprintf(("ntfs_unmount: unmounting...\n"));
  482         td = curthread;
  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, td);
  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, td);
  507         if (error)
  508                 printf("ntfs_unmount: vflush failed(sysnodes): %d\n",error);
  509 
  510         vinvalbuf(ntmp->ntm_devvp, V_SAVE, 0, 0);
  511 
  512         DROP_GIANT();
  513         g_topology_lock();
  514         g_vfs_close(ntmp->ntm_cp);
  515         g_topology_unlock();
  516         PICKUP_GIANT();
  517 
  518         vrele(ntmp->ntm_devvp);
  519 
  520         /* free the toupper table, if this has been last mounted ntfs volume */
  521         ntfs_toupper_unuse();
  522 
  523         dprintf(("ntfs_umount: freeing memory...\n"));
  524         ntfs_u28_uninit(ntmp);
  525         ntfs_82u_uninit(ntmp);
  526         mp->mnt_data = NULL;
  527         MNT_ILOCK(mp);
  528         mp->mnt_flag &= ~MNT_LOCAL;
  529         MNT_IUNLOCK(mp);
  530         free(ntmp->ntm_ad, M_NTFSMNT);
  531         free(ntmp, M_NTFSMNT);
  532         return (error);
  533 }
  534 
  535 static int
  536 ntfs_root(
  537         struct mount *mp,
  538         int flags,
  539         struct vnode **vpp)
  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         tmp = malloc(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 {
  593         struct ntfsmount *ntmp = VFSTONTFS(mp);
  594         u_int64_t mftsize,mftallocated;
  595 
  596         dprintf(("ntfs_statfs():\n"));
  597 
  598         mftsize = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_size;
  599         mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated;
  600 
  601         sbp->f_type = mp->mnt_vfc->vfc_typenum;
  602         sbp->f_bsize = ntmp->ntm_bps;
  603         sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc;
  604         sbp->f_blocks = ntmp->ntm_bootfile.bf_spv;
  605         sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree);
  606         sbp->f_ffree = sbp->f_bfree / ntmp->ntm_bpmftrec;
  607         sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) +
  608                        sbp->f_ffree;
  609         sbp->f_flags = mp->mnt_flag;
  610 
  611         return (0);
  612 }
  613 
  614 /*ARGSUSED*/
  615 static int
  616 ntfs_fhtovp(
  617         struct mount *mp,
  618         struct fid *fhp,
  619         int flags,
  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);
  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: 711c46475d592450d1a779ecd90647e6


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