sys/fs/ntfs/ntfs_vfsops.c

   1 /*      $NetBSD: ntfs_vfsops.c,v 1.79 2009/09/01 15:16:41 pooka 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  *      Id: ntfs_vfsops.c,v 1.7 1999/05/31 11:28:30 phk Exp
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __KERNEL_RCSID(0, "$NetBSD: ntfs_vfsops.c,v 1.79 2009/09/01 15:16:41 pooka Exp $");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/namei.h>
  37 #include <sys/proc.h>
  38 #include <sys/kernel.h>
  39 #include <sys/vnode.h>
  40 #include <sys/mount.h>
  41 #include <sys/buf.h>
  42 #include <sys/fcntl.h>
  43 #include <sys/malloc.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/device.h>
  46 #include <sys/conf.h>
  47 #include <sys/kauth.h>
  48 #include <sys/module.h>
  49
  50 #include <uvm/uvm_extern.h>
  51
  52 #include <miscfs/genfs/genfs.h>
  53 #include <miscfs/specfs/specdev.h>
  54
  55 #include <fs/ntfs/ntfs.h>
  56 #include <fs/ntfs/ntfs_inode.h>
  57 #include <fs/ntfs/ntfs_subr.h>
  58 #include <fs/ntfs/ntfs_vfsops.h>
  59 #include <fs/ntfs/ntfs_ihash.h>
  60 #include <fs/ntfs/ntfsmount.h>
  61
  62 MODULE(MODULE_CLASS_VFS, ntfs, NULL);
  63
  64 MALLOC_JUSTDEFINE(M_NTFSMNT, "NTFS mount", "NTFS mount structure");
  65 MALLOC_JUSTDEFINE(M_NTFSNTNODE,"NTFS ntnode",  "NTFS ntnode information");
  66 MALLOC_JUSTDEFINE(M_NTFSFNODE,"NTFS fnode",  "NTFS fnode information");
  67 MALLOC_JUSTDEFINE(M_NTFSDIR,"NTFS dir",  "NTFS dir buffer");
  68
  69 static int      ntfs_mount(struct mount *, const char *, void *, size_t *);
  70 static int      ntfs_root(struct mount *, struct vnode **);
  71 static int      ntfs_start(struct mount *, int);
  72 static int      ntfs_statvfs(struct mount *, struct statvfs *);
  73 static int      ntfs_sync(struct mount *, int, kauth_cred_t);
  74 static int      ntfs_unmount(struct mount *, int);
  75 static int      ntfs_vget(struct mount *mp, ino_t ino,
  76                                struct vnode **vpp);
  77 static int      ntfs_mountfs(struct vnode *, struct mount *,
  78                                   struct ntfs_args *, struct lwp *);
  79 static int      ntfs_vptofh(struct vnode *, struct fid *, size_t *);
  80
  81 static void     ntfs_init(void);
  82 static void     ntfs_reinit(void);
  83 static void     ntfs_done(void);
  84 static int      ntfs_fhtovp(struct mount *, struct fid *,
  85                                 struct vnode **);
  86 static int      ntfs_mountroot(void);
  87
  88 static const struct genfs_ops ntfs_genfsops = {
  89         .gop_write = genfs_compat_gop_write,
  90 };
  91
  92 static struct sysctllog *ntfs_sysctl_log;
  93
  94 static int
  95 ntfs_mountroot(void)
  96 {
  97         struct mount *mp;
  98         struct lwp *l = curlwp; /* XXX */
  99         int error;
 100         struct ntfs_args args;
 101
 102         if (device_class(root_device) != DV_DISK)
 103                 return (ENODEV);
 104
 105         if ((error = vfs_rootmountalloc(MOUNT_NTFS, "root_device", &mp))) {
 106                 vrele(rootvp);
 107                 return (error);
 108         }
 109
 110         args.flag = 0;
 111         args.uid = 0;
 112         args.gid = 0;
 113         args.mode = 0777;
 114
 115         if ((error = ntfs_mountfs(rootvp, mp, &args, l)) != 0) {
 116                 vfs_unbusy(mp, false, NULL);
 117                 vfs_destroy(mp);
 118                 return (error);
 119         }
 120
 121         mutex_enter(&mountlist_lock);
 122         CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
 123         mutex_exit(&mountlist_lock);
 124         (void)ntfs_statvfs(mp, &mp->mnt_stat);
 125         vfs_unbusy(mp, false, NULL);
 126         return (0);
 127 }
 128
 129 static void
 130 ntfs_init(void)
 131 {
 132
 133         malloc_type_attach(M_NTFSMNT);
 134         malloc_type_attach(M_NTFSNTNODE);
 135         malloc_type_attach(M_NTFSFNODE);
 136         malloc_type_attach(M_NTFSDIR);
 137         malloc_type_attach(M_NTFSNTVATTR);
 138         malloc_type_attach(M_NTFSRDATA);
 139         malloc_type_attach(M_NTFSDECOMP);
 140         malloc_type_attach(M_NTFSRUN);
 141         ntfs_nthashinit();
 142         ntfs_toupper_init();
 143 }
 144
 145 static void
 146 ntfs_reinit(void)
 147 {
 148         ntfs_nthashreinit();
 149 }
 150
 151 static void
 152 ntfs_done(void)
 153 {
 154         ntfs_nthashdone();
 155         malloc_type_detach(M_NTFSMNT);
 156         malloc_type_detach(M_NTFSNTNODE);
 157         malloc_type_detach(M_NTFSFNODE);
 158         malloc_type_detach(M_NTFSDIR);
 159         malloc_type_detach(M_NTFSNTVATTR);
 160         malloc_type_detach(M_NTFSRDATA);
 161         malloc_type_detach(M_NTFSDECOMP);
 162         malloc_type_detach(M_NTFSRUN);
 163 }
 164
 165 static int
 166 ntfs_mount (
 167         struct mount *mp,
 168         const char *path,
 169         void *data,
 170         size_t *data_len)
 171 {
 172         struct lwp *l = curlwp;
 173         int             err = 0, flags;
 174         struct vnode    *devvp;
 175         struct ntfs_args *args = data;
 176
 177         if (*data_len < sizeof *args)
 178                 return EINVAL;
 179
 180         if (mp->mnt_flag & MNT_GETARGS) {
 181                 struct ntfsmount *ntmp = VFSTONTFS(mp);
 182                 if (ntmp == NULL)
 183                         return EIO;
 184                 args->fspec = NULL;
 185                 args->uid = ntmp->ntm_uid;
 186                 args->gid = ntmp->ntm_gid;
 187                 args->mode = ntmp->ntm_mode;
 188                 args->flag = ntmp->ntm_flag;
 189                 *data_len = sizeof *args;
 190                 return 0;
 191         }
 192         /*
 193          ***
 194          * Mounting non-root file system or updating a file system
 195          ***
 196          */
 197
 198         /*
 199          * If updating, check whether changing from read-only to
 200          * read/write; if there is no device name, that's all we do.
 201          */
 202         if (mp->mnt_flag & MNT_UPDATE) {
 203                 printf("ntfs_mount(): MNT_UPDATE not supported\n");
 204                 return (EINVAL);
 205         }
 206
 207         /*
 208          * Not an update, or updating the name: look up the name
 209          * and verify that it refers to a sensible block device.
 210          */
 211         err = namei_simple_user(args->fspec,
 212                                 NSM_FOLLOW_NOEMULROOT, &devvp);
 213         if (err) {
 214                 /* can't get devvp!*/
 215                 return (err);
 216         }
 217
 218         if (devvp->v_type != VBLK) {
 219                 err = ENOTBLK;
 220                 goto fail;
 221         }
 222         if (bdevsw_lookup(devvp->v_rdev) == NULL) {
 223                 err = ENXIO;
 224                 goto fail;
 225         }
 226         if (mp->mnt_flag & MNT_UPDATE) {
 227 #if 0
 228                 /*
 229                  ********************
 230                  * UPDATE
 231                  ********************
 232                  */
 233
 234                 if (devvp != ntmp->um_devvp) {
 235                         err = EINVAL;   /* needs translation */
 236                         goto fail;
 237                 }
 238
 239                 /*
 240                  * Update device name only on success
 241                  */
 242                 err = set_statvfs_info(NULL, UIO_USERSPACE, args->fspec,
 243                     UIO_USERSPACE, mp->mnt_op->vfs_name, mp, p);
 244                 if (err)
 245                         goto fail;
 246
 247                 vrele(devvp);
 248 #endif
 249         } else {
 250                 /*
 251                  ********************
 252                  * NEW MOUNT
 253                  ********************
 254                  */
 255
 256                 /*
 257                  * Since this is a new mount, we want the names for
 258                  * the device and the mount point copied in.  If an
 259                  * error occurs,  the mountpoint is discarded by the
 260                  * upper level code.
 261                  */
 262
 263                 /* Save "last mounted on" info for mount point (NULL pad)*/
 264                 err = set_statvfs_info(path, UIO_USERSPACE, args->fspec,
 265                     UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l);
 266                 if (err)
 267                         goto fail;
 268
 269                 if (mp->mnt_flag & MNT_RDONLY)
 270                         flags = FREAD;
 271                 else
 272                         flags = FREAD|FWRITE;
 273                 err = VOP_OPEN(devvp, flags, FSCRED);
 274                 if (err)
 275                         goto fail;
 276                 err = ntfs_mountfs(devvp, mp, args, l);
 277                 if (err) {
 278                         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 279                         (void)VOP_CLOSE(devvp, flags, NOCRED);
 280                         VOP_UNLOCK(devvp, 0);
 281                         goto fail;
 282                 }
 283         }
 284
 285         /*
 286          * Initialize FS stat information in mount struct; uses both
 287          * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
 288          *
 289          * This code is common to root and non-root mounts
 290          */
 291         (void)VFS_STATVFS(mp, &mp->mnt_stat);
 292         return (err);
 293
 294 fail:
 295         vrele(devvp);
 296         return (err);
 297 }
 298
 299 /*
 300  * Common code for mount and mountroot
 301  */
 302 int
 303 ntfs_mountfs(struct vnode *devvp, struct mount *mp, struct ntfs_args *argsp, struct lwp *l)
 304 {
 305         struct buf *bp;
 306         struct ntfsmount *ntmp;
 307         dev_t dev = devvp->v_rdev;
 308         int error, ronly, i;
 309         struct vnode *vp;
 310
 311         ntmp = NULL;
 312
 313         /*
 314          * Flush out any old buffers remaining from a previous use.
 315          */
 316         vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
 317         error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0);
 318         VOP_UNLOCK(devvp, 0);
 319         if (error)
 320                 return (error);
 321
 322         ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
 323
 324         bp = NULL;
 325
 326         error = bread(devvp, BBLOCK, BBSIZE, NOCRED, 0, &bp);
 327         if (error)
 328                 goto out;
 329         ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK|M_ZERO);
 330         memcpy( &ntmp->ntm_bootfile,  bp->b_data, sizeof(struct bootfile) );
 331         brelse( bp , 0 );
 332         bp = NULL;
 333
 334         if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) {
 335                 error = EINVAL;
 336                 dprintf(("ntfs_mountfs: invalid boot block\n"));
 337                 goto out;
 338         }
 339
 340         {
 341                 int8_t cpr = ntmp->ntm_mftrecsz;
 342                 if( cpr > 0 )
 343                         ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr;
 344                 else
 345                         ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps;
 346         }
 347         dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
 348                 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media,
 349                 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec));
 350         dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n",
 351                 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn));
 352
 353         ntmp->ntm_mountp = mp;
 354         ntmp->ntm_dev = dev;
 355         ntmp->ntm_devvp = devvp;
 356         ntmp->ntm_uid = argsp->uid;
 357         ntmp->ntm_gid = argsp->gid;
 358         ntmp->ntm_mode = argsp->mode;
 359         ntmp->ntm_flag = argsp->flag;
 360         mp->mnt_data = ntmp;
 361
 362         /* set file name encode/decode hooks XXX utf-8 only for now */
 363         ntmp->ntm_wget = ntfs_utf8_wget;
 364         ntmp->ntm_wput = ntfs_utf8_wput;
 365         ntmp->ntm_wcmp = ntfs_utf8_wcmp;
 366
 367         dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n",
 368                 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.",
 369                 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"",
 370                 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode));
 371
 372         /*
 373          * We read in some system nodes to do not allow
 374          * reclaim them and to have everytime access to them.
 375          */
 376         {
 377                 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO };
 378                 for (i=0; i<3; i++) {
 379                         error = VFS_VGET(mp, pi[i], &(ntmp->ntm_sysvn[pi[i]]));
 380                         if(error)
 381                                 goto out1;
 382                         ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM;
 383                         vref(ntmp->ntm_sysvn[pi[i]]);
 384                         vput(ntmp->ntm_sysvn[pi[i]]);
 385                 }
 386         }
 387
 388         /* read the Unicode lowercase --> uppercase translation table,
 389          * if necessary */
 390         if ((error = ntfs_toupper_use(mp, ntmp)))
 391                 goto out1;
 392
 393         /*
 394          * Scan $BitMap and count free clusters
 395          */
 396         error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree);
 397         if(error)
 398                 goto out1;
 399
 400         /*
 401          * Read and translate to internal format attribute
 402          * definition file.
 403          */
 404         {
 405                 int num,j;
 406                 struct attrdef ad;
 407
 408                 /* Open $AttrDef */
 409                 error = VFS_VGET(mp, NTFS_ATTRDEFINO, &vp );
 410                 if(error)
 411                         goto out1;
 412
 413                 /* Count valid entries */
 414                 for(num=0;;num++) {
 415                         error = ntfs_readattr(ntmp, VTONT(vp),
 416                                         NTFS_A_DATA, NULL,
 417                                         num * sizeof(ad), sizeof(ad),
 418                                         &ad, NULL);
 419                         if (error)
 420                                 goto out1;
 421                         if (ad.ad_name[0] == 0)
 422                                 break;
 423                 }
 424
 425                 /* Alloc memory for attribute definitions */
 426                 ntmp->ntm_ad = (struct ntvattrdef *) malloc(
 427                         num * sizeof(struct ntvattrdef),
 428                         M_NTFSMNT, M_WAITOK);
 429
 430                 ntmp->ntm_adnum = num;
 431
 432                 /* Read them and translate */
 433                 for(i=0;i<num;i++){
 434                         error = ntfs_readattr(ntmp, VTONT(vp),
 435                                         NTFS_A_DATA, NULL,
 436                                         i * sizeof(ad), sizeof(ad),
 437                                         &ad, NULL);
 438                         if (error)
 439                                 goto out1;
 440                         j = 0;
 441                         do {
 442                                 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j];
 443                         } while(ad.ad_name[j++]);
 444                         ntmp->ntm_ad[i].ad_namelen = j - 1;
 445                         ntmp->ntm_ad[i].ad_type = ad.ad_type;
 446                 }
 447
 448                 vput(vp);
 449         }
 450
 451         mp->mnt_stat.f_fsidx.__fsid_val[0] = dev;
 452         mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS);
 453         mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
 454         mp->mnt_stat.f_namemax = NTFS_MAXFILENAME;
 455         mp->mnt_flag |= MNT_LOCAL;
 456         devvp->v_specmountpoint = mp;
 457         return (0);
 458
 459 out1:
 460         for(i=0;i<NTFS_SYSNODESNUM;i++)
 461                 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
 462
 463         if (vflush(mp,NULLVP,0)) {
 464                 dprintf(("ntfs_mountfs: vflush failed\n"));
 465         }
 466 out:
 467         devvp->v_specmountpoint = NULL;
 468         if (bp)
 469                 brelse(bp, 0);
 470
 471         if (error) {
 472                 if (ntmp) {
 473                         if (ntmp->ntm_ad)
 474                                 free(ntmp->ntm_ad, M_NTFSMNT);
 475                         free(ntmp, M_NTFSMNT);
 476                 }
 477         }
 478
 479         return (error);
 480 }
 481
 482 static int
 483 ntfs_start (
 484         struct mount *mp,
 485         int flags)
 486 {
 487         return (0);
 488 }
 489
 490 static int
 491 ntfs_unmount(
 492         struct mount *mp,
 493         int mntflags)
 494 {
 495         struct lwp *l = curlwp;
 496         struct ntfsmount *ntmp;
 497         int error, ronly = 0, flags, i;
 498
 499         dprintf(("ntfs_unmount: unmounting...\n"));
 500         ntmp = VFSTONTFS(mp);
 501
 502         flags = 0;
 503         if(mntflags & MNT_FORCE)
 504                 flags |= FORCECLOSE;
 505
 506         dprintf(("ntfs_unmount: vflushing...\n"));
 507         error = vflush(mp,NULLVP,flags | SKIPSYSTEM);
 508         if (error) {
 509                 dprintf(("ntfs_unmount: vflush failed: %d\n",error));
 510                 return (error);
 511         }
 512
 513         /* Check if only system vnodes are rest */
 514         for(i=0;i<NTFS_SYSNODESNUM;i++)
 515                  if((ntmp->ntm_sysvn[i]) &&
 516                     (ntmp->ntm_sysvn[i]->v_usecount > 1)) return (EBUSY);
 517
 518         /* Dereference all system vnodes */
 519         for(i=0;i<NTFS_SYSNODESNUM;i++)
 520                  if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
 521
 522         /* vflush system vnodes */
 523         error = vflush(mp,NULLVP,flags);
 524         if (error) {
 525                 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error);
 526         }
 527
 528         /* Check if the type of device node isn't VBAD before
 529          * touching v_specinfo.  If the device vnode is revoked, the
 530          * field is NULL and touching it causes null pointer derefercence.
 531          */
 532         if (ntmp->ntm_devvp->v_type != VBAD)
 533                 ntmp->ntm_devvp->v_specmountpoint = NULL;
 534
 535         vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0);
 536
 537         /* lock the device vnode before calling VOP_CLOSE() */
 538         vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY);
 539         error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE,
 540                 NOCRED);
 541         KASSERT(error == 0);
 542         VOP_UNLOCK(ntmp->ntm_devvp, 0);
 543
 544         vrele(ntmp->ntm_devvp);
 545
 546         /* free the toupper table, if this has been last mounted ntfs volume */
 547         ntfs_toupper_unuse();
 548
 549         dprintf(("ntfs_umount: freeing memory...\n"));
 550         mp->mnt_data = NULL;
 551         mp->mnt_flag &= ~MNT_LOCAL;
 552         free(ntmp->ntm_ad, M_NTFSMNT);
 553         free(ntmp, M_NTFSMNT);
 554         return (0);
 555 }
 556
 557 static int
 558 ntfs_root(
 559         struct mount *mp,
 560         struct vnode **vpp)
 561 {
 562         struct vnode *nvp;
 563         int error = 0;
 564
 565         dprintf(("ntfs_root(): sysvn: %p\n",
 566                 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO]));
 567         error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, &nvp);
 568         if(error) {
 569                 printf("ntfs_root: VFS_VGET failed: %d\n",error);
 570                 return (error);
 571         }
 572
 573         *vpp = nvp;
 574         return (0);
 575 }
 576
 577 int
 578 ntfs_calccfree(
 579         struct ntfsmount *ntmp,
 580         cn_t *cfreep)
 581 {
 582         struct vnode *vp;
 583         u_int8_t *tmp;
 584         int j, error;
 585         cn_t cfree = 0;
 586         size_t bmsize, i;
 587
 588         vp = ntmp->ntm_sysvn[NTFS_BITMAPINO];
 589
 590         bmsize = VTOF(vp)->f_size;
 591
 592         tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK);
 593
 594         error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
 595                                0, bmsize, tmp, NULL);
 596         if (error)
 597                 goto out;
 598
 599         for(i=0;i<bmsize;i++)
 600                 for(j=0;j<8;j++)
 601                         if(~tmp[i] & (1 << j)) cfree++;
 602         *cfreep = cfree;
 603
 604     out:
 605         free(tmp, M_TEMP);
 606         return(error);
 607 }
 608
 609 static int
 610 ntfs_statvfs(
 611         struct mount *mp,
 612         struct statvfs *sbp)
 613 {
 614         struct ntfsmount *ntmp = VFSTONTFS(mp);
 615         u_int64_t mftallocated;
 616
 617         dprintf(("ntfs_statvfs():\n"));
 618
 619         mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated;
 620
 621         sbp->f_bsize = ntmp->ntm_bps;
 622         sbp->f_frsize = sbp->f_bsize; /* XXX */
 623         sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc;
 624         sbp->f_blocks = ntmp->ntm_bootfile.bf_spv;
 625         sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree);
 626         sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec;
 627         sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) +
 628             sbp->f_ffree;
 629         sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */
 630         sbp->f_flag = mp->mnt_flag;
 631         copy_statvfs_info(sbp, mp);
 632         return (0);
 633 }
 634
 635 static int
 636 ntfs_sync (
 637         struct mount *mp,
 638         int waitfor,
 639         kauth_cred_t cred)
 640 {
 641         /*dprintf(("ntfs_sync():\n"));*/
 642         return (0);
 643 }
 644
 645 /*ARGSUSED*/
 646 static int
 647 ntfs_fhtovp(
 648         struct mount *mp,
 649         struct fid *fhp,
 650         struct vnode **vpp)
 651 {
 652         struct ntfid ntfh;
 653         int error;
 654
 655         if (fhp->fid_len != sizeof(struct ntfid))
 656                 return EINVAL;
 657         memcpy(&ntfh, fhp, sizeof(ntfh));
 658         ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname,
 659             (unsigned long long)ntfh.ntfid_ino));
 660
 661         error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, NULL,
 662                         LK_EXCLUSIVE | LK_RETRY, 0, vpp);
 663         if (error != 0) {
 664                 *vpp = NULLVP;
 665                 return (error);
 666         }
 667
 668         /* XXX as unlink/rmdir/mkdir/creat are not currently possible
 669          * with NTFS, we don't need to check anything else for now */
 670         return (0);
 671 }
 672
 673 static int
 674 ntfs_vptofh(
 675         struct vnode *vp,
 676         struct fid *fhp,
 677         size_t *fh_size)
 678 {
 679         struct ntnode *ntp;
 680         struct ntfid ntfh;
 681         struct fnode *fn;
 682
 683         if (*fh_size < sizeof(struct ntfid)) {
 684                 *fh_size = sizeof(struct ntfid);
 685                 return E2BIG;
 686         }
 687         *fh_size = sizeof(struct ntfid);
 688
 689         ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname,
 690                 vp));
 691
 692         fn = VTOF(vp);
 693         ntp = VTONT(vp);
 694         memset(&ntfh, 0, sizeof(ntfh));
 695         ntfh.ntfid_len = sizeof(struct ntfid);
 696         ntfh.ntfid_ino = ntp->i_number;
 697         ntfh.ntfid_attr = fn->f_attrtype;
 698 #ifdef notyet
 699         ntfh.ntfid_gen = ntp->i_gen;
 700 #endif
 701         memcpy(fhp, &ntfh, sizeof(ntfh));
 702         return (0);
 703 }
 704
 705 int
 706 ntfs_vgetex(
 707         struct mount *mp,
 708         ino_t ino,
 709         u_int32_t attrtype,
 710         char *attrname,
 711         u_long lkflags,
 712         u_long flags,
 713         struct vnode **vpp)
 714 {
 715         int error;
 716         struct ntfsmount *ntmp;
 717         struct ntnode *ip;
 718         struct fnode *fp;
 719         struct vnode *vp;
 720         enum vtype f_type = VBAD;
 721
 722         dprintf(("ntfs_vgetex: ino: %llu, attr: 0x%x:%s, lkf: 0x%lx, f:"
 723             " 0x%lx\n", (unsigned long long)ino, attrtype,
 724             attrname ? attrname : "", (u_long)lkflags, (u_long)flags));
 725
 726         ntmp = VFSTONTFS(mp);
 727         *vpp = NULL;
 728
 729         /* Get ntnode */
 730         error = ntfs_ntlookup(ntmp, ino, &ip);
 731         if (error) {
 732                 printf("ntfs_vget: ntfs_ntget failed\n");
 733                 return (error);
 734         }
 735
 736         /* It may be not initialized fully, so force load it */
 737         if (!(flags & VG_DONTLOADIN) && !(ip->i_flag & IN_LOADED)) {
 738                 error = ntfs_loadntnode(ntmp, ip);
 739                 if(error) {
 740                         printf("ntfs_vget: CAN'T LOAD ATTRIBUTES FOR INO:"
 741                             " %llu\n", (unsigned long long)ip->i_number);
 742                         ntfs_ntput(ip);
 743                         return (error);
 744                 }
 745         }
 746
 747         error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp);
 748         if (error) {
 749                 printf("ntfs_vget: ntfs_fget failed\n");
 750                 ntfs_ntput(ip);
 751                 return (error);
 752         }
 753
 754         if (!(flags & VG_DONTVALIDFN) && !(fp->f_flag & FN_VALID)) {
 755                 if ((ip->i_frflag & NTFS_FRFLAG_DIR) &&
 756                     (fp->f_attrtype == NTFS_A_DATA && fp->f_attrname == NULL)) {
 757                         f_type = VDIR;
 758                 } else if (flags & VG_EXT) {
 759                         f_type = VNON;
 760                         fp->f_size = fp->f_allocated = 0;
 761                 } else {
 762                         f_type = VREG;
 763
 764                         error = ntfs_filesize(ntmp, fp,
 765                                               &fp->f_size, &fp->f_allocated);
 766                         if (error) {
 767                                 ntfs_ntput(ip);
 768                                 return (error);
 769                         }
 770                 }
 771
 772                 fp->f_flag |= FN_VALID;
 773         }
 774
 775         /*
 776          * We may be calling vget() now. To avoid potential deadlock, we need
 777          * to release ntnode lock, since due to locking order vnode
 778          * lock has to be acquired first.
 779          * ntfs_fget() bumped ntnode usecount, so ntnode won't be recycled
 780          * prematurely.
 781          */
 782         ntfs_ntput(ip);
 783
 784         if (FTOV(fp)) {
 785                 /* vget() returns error if the vnode has been recycled */
 786                 if (vget(FTOV(fp), lkflags) == 0) {
 787                         *vpp = FTOV(fp);
 788                         return (0);
 789                 }
 790         }
 791
 792         error = getnewvnode(VT_NTFS, ntmp->ntm_mountp, ntfs_vnodeop_p, &vp);
 793         if(error) {
 794                 ntfs_frele(fp);
 795                 ntfs_ntput(ip);
 796                 return (error);
 797         }
 798         dprintf(("ntfs_vget: vnode: %p for ntnode: %llu\n", vp,
 799             (unsigned long long)ino));
 800
 801         fp->f_vp = vp;
 802         vp->v_data = fp;
 803         if (f_type != VBAD)
 804                 vp->v_type = f_type;
 805         genfs_node_init(vp, &ntfs_genfsops);
 806
 807         if (ino == NTFS_ROOTINO)
 808                 vp->v_vflag |= VV_ROOT;
 809
 810         if (lkflags & LK_TYPE_MASK) {
 811                 error = vn_lock(vp, lkflags);
 812                 if (error) {
 813                         vput(vp);
 814                         return (error);
 815                 }
 816         }
 817
 818         uvm_vnp_setsize(vp, fp->f_size); /* XXX: mess, cf. ntfs_lookupfile() */
 819         vref(ip->i_devvp);
 820         *vpp = vp;
 821         return (0);
 822 }
 823
 824 static int
 825 ntfs_vget(
 826         struct mount *mp,
 827         ino_t ino,
 828         struct vnode **vpp)
 829 {
 830         return ntfs_vgetex(mp, ino, NTFS_A_DATA, NULL,
 831                         LK_EXCLUSIVE | LK_RETRY, 0, vpp);
 832 }
 833
 834 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc;
 835
 836 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = {
 837         &ntfs_vnodeop_opv_desc,
 838         NULL,
 839 };
 840
 841 struct vfsops ntfs_vfsops = {
 842         MOUNT_NTFS,
 843         sizeof (struct ntfs_args),
 844         ntfs_mount,
 845         ntfs_start,
 846         ntfs_unmount,
 847         ntfs_root,
 848         (void *)eopnotsupp,     /* vfs_quotactl */
 849         ntfs_statvfs,
 850         ntfs_sync,
 851         ntfs_vget,
 852         ntfs_fhtovp,
 853         ntfs_vptofh,
 854         ntfs_init,
 855         ntfs_reinit,
 856         ntfs_done,
 857         ntfs_mountroot,
 858         (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
 859         vfs_stdextattrctl,
 860         (void *)eopnotsupp,             /* vfs_suspendctl */
 861         genfs_renamelock_enter,
 862         genfs_renamelock_exit,
 863         (void *)eopnotsupp,
 864         ntfs_vnodeopv_descs,
 865         0,
 866         { NULL, NULL },
 867 };
 868
 869 static int
 870 ntfs_modcmd(modcmd_t cmd, void *arg)
 871 {
 872         int error;
 873
 874         switch (cmd) {
 875         case MODULE_CMD_INIT:
 876                 error = vfs_attach(&ntfs_vfsops);
 877                 if (error != 0)
 878                         break;
 879                 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL,
 880                                CTLFLAG_PERMANENT,
 881                                CTLTYPE_NODE, "vfs", NULL,
 882                                NULL, 0, NULL, 0,
 883                                CTL_VFS, CTL_EOL);
 884                 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL,
 885                                CTLFLAG_PERMANENT,
 886                                CTLTYPE_NODE, "ntfs",
 887                                SYSCTL_DESCR("NTFS file system"),
 888                                NULL, 0, NULL, 0,
 889                                CTL_VFS, 20, CTL_EOL);
 890                 /*
 891                  * XXX the "20" above could be dynamic, thereby eliminating
 892                  * one more instance of the "number to vfs" mapping problem,
 893                  * but "20" is the order as taken from sys/mount.h
 894                  */
 895                 break;
 896         case MODULE_CMD_FINI:
 897                 error = vfs_detach(&ntfs_vfsops);
 898                 if (error != 0)
 899                         break;
 900                 sysctl_teardown(&ntfs_sysctl_log);
 901                 break;
 902         default:
 903                 error = ENOTTY;
 904                 break;
 905         }
 906
 907         return (error);
 908 }