ntfs_vfsops.c revision 1.91
1 /* $NetBSD: ntfs_vfsops.c,v 1.91 2013/12/10 18:20:32 christos 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 1.91 2013/12/10 18:20:32 christos 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 mountlist_append(mp); 122 (void)ntfs_statvfs(mp, &mp->mnt_stat); 123 vfs_unbusy(mp, false, NULL); 124 return (0); 125 } 126 127 static void 128 ntfs_init(void) 129 { 130 131 malloc_type_attach(M_NTFSMNT); 132 malloc_type_attach(M_NTFSNTNODE); 133 malloc_type_attach(M_NTFSFNODE); 134 malloc_type_attach(M_NTFSDIR); 135 malloc_type_attach(M_NTFSNTVATTR); 136 malloc_type_attach(M_NTFSRDATA); 137 malloc_type_attach(M_NTFSDECOMP); 138 malloc_type_attach(M_NTFSRUN); 139 ntfs_nthashinit(); 140 ntfs_toupper_init(); 141 } 142 143 static void 144 ntfs_reinit(void) 145 { 146 ntfs_nthashreinit(); 147 } 148 149 static void 150 ntfs_done(void) 151 { 152 ntfs_nthashdone(); 153 malloc_type_detach(M_NTFSMNT); 154 malloc_type_detach(M_NTFSNTNODE); 155 malloc_type_detach(M_NTFSFNODE); 156 malloc_type_detach(M_NTFSDIR); 157 malloc_type_detach(M_NTFSNTVATTR); 158 malloc_type_detach(M_NTFSRDATA); 159 malloc_type_detach(M_NTFSDECOMP); 160 malloc_type_detach(M_NTFSRUN); 161 } 162 163 static int 164 ntfs_mount ( 165 struct mount *mp, 166 const char *path, 167 void *data, 168 size_t *data_len) 169 { 170 struct lwp *l = curlwp; 171 int err = 0, flags; 172 struct vnode *devvp; 173 struct ntfs_args *args = data; 174 175 if (*data_len < sizeof *args) 176 return EINVAL; 177 178 if (mp->mnt_flag & MNT_GETARGS) { 179 struct ntfsmount *ntmp = VFSTONTFS(mp); 180 if (ntmp == NULL) 181 return EIO; 182 args->fspec = NULL; 183 args->uid = ntmp->ntm_uid; 184 args->gid = ntmp->ntm_gid; 185 args->mode = ntmp->ntm_mode; 186 args->flag = ntmp->ntm_flag; 187 *data_len = sizeof *args; 188 return 0; 189 } 190 /* 191 *** 192 * Mounting non-root file system or updating a file system 193 *** 194 */ 195 196 /* 197 * If updating, check whether changing from read-only to 198 * read/write; if there is no device name, that's all we do. 199 */ 200 if (mp->mnt_flag & MNT_UPDATE) { 201 printf("ntfs_mount(): MNT_UPDATE not supported\n"); 202 return (EINVAL); 203 } 204 205 /* 206 * Not an update, or updating the name: look up the name 207 * and verify that it refers to a sensible block device. 208 */ 209 err = namei_simple_user(args->fspec, 210 NSM_FOLLOW_NOEMULROOT, &devvp); 211 if (err) { 212 /* can't get devvp!*/ 213 return (err); 214 } 215 216 if (devvp->v_type != VBLK) { 217 err = ENOTBLK; 218 goto fail; 219 } 220 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 221 err = ENXIO; 222 goto fail; 223 } 224 if (mp->mnt_flag & MNT_UPDATE) { 225 #if 0 226 /* 227 ******************** 228 * UPDATE 229 ******************** 230 */ 231 232 if (devvp != ntmp->um_devvp) { 233 err = EINVAL; /* needs translation */ 234 goto fail; 235 } 236 237 /* 238 * Update device name only on success 239 */ 240 err = set_statvfs_info(NULL, UIO_USERSPACE, args->fspec, 241 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, p); 242 if (err) 243 goto fail; 244 245 vrele(devvp); 246 #endif 247 } else { 248 /* 249 ******************** 250 * NEW MOUNT 251 ******************** 252 */ 253 254 /* 255 * Since this is a new mount, we want the names for 256 * the device and the mount point copied in. If an 257 * error occurs, the mountpoint is discarded by the 258 * upper level code. 259 */ 260 261 /* Save "last mounted on" info for mount point (NULL pad)*/ 262 err = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 263 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 264 if (err) 265 goto fail; 266 267 if (mp->mnt_flag & MNT_RDONLY) 268 flags = FREAD; 269 else 270 flags = FREAD|FWRITE; 271 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 272 err = VOP_OPEN(devvp, flags, FSCRED); 273 VOP_UNLOCK(devvp); 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); 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, 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); 319 if (error) 320 return (error); 321 322 bp = NULL; 323 324 error = bread(devvp, BBLOCK, BBSIZE, NOCRED, 0, &bp); 325 if (error) 326 goto out; 327 ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK|M_ZERO); 328 memcpy( &ntmp->ntm_bootfile, bp->b_data, sizeof(struct bootfile) ); 329 brelse( bp , 0 ); 330 bp = NULL; 331 332 if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) { 333 error = EINVAL; 334 dprintf(("ntfs_mountfs: invalid boot block\n")); 335 goto out; 336 } 337 338 { 339 int8_t cpr = ntmp->ntm_mftrecsz; 340 if( cpr > 0 ) 341 ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr; 342 else 343 ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps; 344 } 345 dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n", 346 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media, 347 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec)); 348 dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n", 349 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn)); 350 351 ntmp->ntm_mountp = mp; 352 ntmp->ntm_dev = dev; 353 ntmp->ntm_devvp = devvp; 354 ntmp->ntm_uid = argsp->uid; 355 ntmp->ntm_gid = argsp->gid; 356 ntmp->ntm_mode = argsp->mode; 357 ntmp->ntm_flag = argsp->flag; 358 mp->mnt_data = ntmp; 359 360 /* set file name encode/decode hooks XXX utf-8 only for now */ 361 ntmp->ntm_wget = ntfs_utf8_wget; 362 ntmp->ntm_wput = ntfs_utf8_wput; 363 ntmp->ntm_wcmp = ntfs_utf8_wcmp; 364 365 dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n", 366 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.", 367 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"", 368 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode)); 369 370 /* 371 * We read in some system nodes to do not allow 372 * reclaim them and to have everytime access to them. 373 */ 374 { 375 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO }; 376 for (i=0; i<3; i++) { 377 error = VFS_VGET(mp, pi[i], &(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, &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 ntmp->ntm_ad = (struct ntvattrdef *) malloc( 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_fsidx.__fsid_val[0] = dev; 450 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS); 451 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 452 mp->mnt_stat.f_namemax = NTFS_MAXFILENAME; 453 mp->mnt_flag |= MNT_LOCAL; 454 spec_node_setmountedfs(devvp, mp); 455 return (0); 456 457 out1: 458 for(i=0;i<NTFS_SYSNODESNUM;i++) 459 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]); 460 461 if (vflush(mp,NULLVP,0)) { 462 dprintf(("ntfs_mountfs: vflush failed\n")); 463 } 464 out: 465 spec_node_setmountedfs(devvp, NULL); 466 if (bp) 467 brelse(bp, 0); 468 469 if (error) { 470 if (ntmp) { 471 if (ntmp->ntm_ad) 472 free(ntmp->ntm_ad, M_NTFSMNT); 473 free(ntmp, M_NTFSMNT); 474 } 475 } 476 477 return (error); 478 } 479 480 static int 481 ntfs_start ( 482 struct mount *mp, 483 int flags) 484 { 485 return (0); 486 } 487 488 static int 489 ntfs_unmount( 490 struct mount *mp, 491 int mntflags) 492 { 493 struct lwp *l = curlwp; 494 struct ntfsmount *ntmp; 495 int error, ronly = 0, flags, i; 496 497 dprintf(("ntfs_unmount: unmounting...\n")); 498 ntmp = VFSTONTFS(mp); 499 500 flags = 0; 501 if(mntflags & MNT_FORCE) 502 flags |= FORCECLOSE; 503 504 dprintf(("ntfs_unmount: vflushing...\n")); 505 error = vflush(mp,NULLVP,flags | SKIPSYSTEM); 506 if (error) { 507 dprintf(("ntfs_unmount: vflush failed: %d\n",error)); 508 return (error); 509 } 510 511 /* Check if only system vnodes are rest */ 512 for(i=0;i<NTFS_SYSNODESNUM;i++) 513 if((ntmp->ntm_sysvn[i]) && 514 (ntmp->ntm_sysvn[i]->v_usecount > 1)) return (EBUSY); 515 516 /* Dereference all system vnodes */ 517 for(i=0;i<NTFS_SYSNODESNUM;i++) 518 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]); 519 520 /* vflush system vnodes */ 521 error = vflush(mp,NULLVP,flags); 522 if (error) { 523 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error); 524 } 525 526 /* Check if the type of device node isn't VBAD before 527 * touching v_specinfo. If the device vnode is revoked, the 528 * field is NULL and touching it causes null pointer derefercence. 529 */ 530 if (ntmp->ntm_devvp->v_type != VBAD) 531 spec_node_setmountedfs(ntmp->ntm_devvp, NULL); 532 533 error = vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0); 534 KASSERT(error == 0); 535 536 /* lock the device vnode before calling VOP_CLOSE() */ 537 vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY); 538 error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE, 539 NOCRED); 540 KASSERT(error == 0); 541 VOP_UNLOCK(ntmp->ntm_devvp); 542 543 vrele(ntmp->ntm_devvp); 544 545 /* free the toupper table, if this has been last mounted ntfs volume */ 546 ntfs_toupper_unuse(); 547 548 dprintf(("ntfs_umount: freeing memory...\n")); 549 mp->mnt_data = NULL; 550 mp->mnt_flag &= ~MNT_LOCAL; 551 free(ntmp->ntm_ad, M_NTFSMNT); 552 free(ntmp, M_NTFSMNT); 553 return (0); 554 } 555 556 static int 557 ntfs_root( 558 struct mount *mp, 559 struct vnode **vpp) 560 { 561 struct vnode *nvp; 562 int error = 0; 563 564 dprintf(("ntfs_root(): sysvn: %p\n", 565 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO])); 566 error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, &nvp); 567 if(error) { 568 printf("ntfs_root: VFS_VGET failed: %d\n",error); 569 return (error); 570 } 571 572 *vpp = nvp; 573 return (0); 574 } 575 576 int 577 ntfs_calccfree( 578 struct ntfsmount *ntmp, 579 cn_t *cfreep) 580 { 581 struct vnode *vp; 582 u_int8_t *tmp; 583 int j, error; 584 cn_t cfree = 0; 585 size_t bmsize, i; 586 587 vp = ntmp->ntm_sysvn[NTFS_BITMAPINO]; 588 589 bmsize = VTOF(vp)->f_size; 590 591 tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK); 592 593 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 594 0, bmsize, tmp, NULL); 595 if (error) 596 goto out; 597 598 for(i=0;i<bmsize;i++) 599 for(j=0;j<8;j++) 600 if(~tmp[i] & (1 << j)) cfree++; 601 *cfreep = cfree; 602 603 out: 604 free(tmp, M_TEMP); 605 return(error); 606 } 607 608 static int 609 ntfs_statvfs( 610 struct mount *mp, 611 struct statvfs *sbp) 612 { 613 struct ntfsmount *ntmp = VFSTONTFS(mp); 614 u_int64_t mftallocated; 615 616 dprintf(("ntfs_statvfs():\n")); 617 618 mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated; 619 620 sbp->f_bsize = ntmp->ntm_bps; 621 sbp->f_frsize = sbp->f_bsize; /* XXX */ 622 sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc; 623 sbp->f_blocks = ntmp->ntm_bootfile.bf_spv; 624 sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree); 625 sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec; 626 sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) + 627 sbp->f_ffree; 628 sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */ 629 sbp->f_flag = mp->mnt_flag; 630 copy_statvfs_info(sbp, mp); 631 return (0); 632 } 633 634 static int 635 ntfs_sync ( 636 struct mount *mp, 637 int waitfor, 638 kauth_cred_t cred) 639 { 640 /*dprintf(("ntfs_sync():\n"));*/ 641 return (0); 642 } 643 644 /*ARGSUSED*/ 645 static int 646 ntfs_fhtovp( 647 struct mount *mp, 648 struct fid *fhp, 649 struct vnode **vpp) 650 { 651 struct ntfid ntfh; 652 int error; 653 654 if (fhp->fid_len != sizeof(struct ntfid)) 655 return EINVAL; 656 memcpy(&ntfh, fhp, sizeof(ntfh)); 657 ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname, 658 (unsigned long long)ntfh.ntfid_ino)); 659 660 error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, NULL, 661 LK_EXCLUSIVE, 0, vpp); 662 if (error != 0) { 663 *vpp = NULLVP; 664 return (error); 665 } 666 667 /* XXX as unlink/rmdir/mkdir/creat are not currently possible 668 * with NTFS, we don't need to check anything else for now */ 669 return (0); 670 } 671 672 static int 673 ntfs_vptofh( 674 struct vnode *vp, 675 struct fid *fhp, 676 size_t *fh_size) 677 { 678 struct ntnode *ntp; 679 struct ntfid ntfh; 680 struct fnode *fn; 681 682 if (*fh_size < sizeof(struct ntfid)) { 683 *fh_size = sizeof(struct ntfid); 684 return E2BIG; 685 } 686 *fh_size = sizeof(struct ntfid); 687 688 ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname, 689 vp)); 690 691 fn = VTOF(vp); 692 ntp = VTONT(vp); 693 memset(&ntfh, 0, sizeof(ntfh)); 694 ntfh.ntfid_len = sizeof(struct ntfid); 695 ntfh.ntfid_ino = ntp->i_number; 696 ntfh.ntfid_attr = fn->f_attrtype; 697 #ifdef notyet 698 ntfh.ntfid_gen = ntp->i_gen; 699 #endif 700 memcpy(fhp, &ntfh, sizeof(ntfh)); 701 return (0); 702 } 703 704 int 705 ntfs_vgetex( 706 struct mount *mp, 707 ino_t ino, 708 u_int32_t attrtype, 709 char *attrname, 710 u_long lkflags, 711 u_long flags, 712 struct vnode **vpp) 713 { 714 int error; 715 struct ntfsmount *ntmp; 716 struct ntnode *ip; 717 struct fnode *fp; 718 struct vnode *vp; 719 enum vtype f_type = VBAD; 720 721 dprintf(("ntfs_vgetex: ino: %llu, attr: 0x%x:%s, lkf: 0x%lx, f:" 722 " 0x%lx\n", (unsigned long long)ino, attrtype, 723 attrname ? attrname : "", (u_long)lkflags, (u_long)flags)); 724 725 ntmp = VFSTONTFS(mp); 726 *vpp = NULL; 727 728 loop: 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 * Take v_interlock before releasing ntnode lock to avoid races. 782 */ 783 vp = FTOV(fp); 784 if (vp) { 785 mutex_enter(vp->v_interlock); 786 ntfs_ntput(ip); 787 if (vget(vp, lkflags) != 0) 788 goto loop; 789 *vpp = vp; 790 return 0; 791 } 792 ntfs_ntput(ip); 793 794 error = getnewvnode(VT_NTFS, ntmp->ntm_mountp, ntfs_vnodeop_p, 795 NULL, &vp); 796 if(error) { 797 ntfs_frele(fp); 798 return (error); 799 } 800 ntfs_ntget(ip); 801 error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp); 802 if (error) { 803 printf("ntfs_vget: ntfs_fget failed\n"); 804 ntfs_ntput(ip); 805 return (error); 806 } 807 if (FTOV(fp)) { 808 /* 809 * Another thread beat us, put back freshly allocated 810 * vnode and retry. 811 */ 812 ntfs_ntput(ip); 813 ungetnewvnode(vp); 814 goto loop; 815 } 816 dprintf(("ntfs_vget: vnode: %p for ntnode: %llu\n", vp, 817 (unsigned long long)ino)); 818 819 fp->f_vp = vp; 820 vp->v_data = fp; 821 if (f_type != VBAD) 822 vp->v_type = f_type; 823 genfs_node_init(vp, &ntfs_genfsops); 824 825 if (ino == NTFS_ROOTINO) 826 vp->v_vflag |= VV_ROOT; 827 828 ntfs_ntput(ip); 829 830 if (lkflags & (LK_EXCLUSIVE | LK_SHARED)) { 831 error = vn_lock(vp, lkflags); 832 if (error) { 833 vput(vp); 834 return (error); 835 } 836 } 837 838 uvm_vnp_setsize(vp, fp->f_size); /* XXX: mess, cf. ntfs_lookupfile() */ 839 vref(ip->i_devvp); 840 *vpp = vp; 841 return (0); 842 } 843 844 static int 845 ntfs_vget( 846 struct mount *mp, 847 ino_t ino, 848 struct vnode **vpp) 849 { 850 return ntfs_vgetex(mp, ino, NTFS_A_DATA, NULL, LK_EXCLUSIVE, 0, vpp); 851 } 852 853 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc; 854 855 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = { 856 &ntfs_vnodeop_opv_desc, 857 NULL, 858 }; 859 860 struct vfsops ntfs_vfsops = { 861 MOUNT_NTFS, 862 sizeof (struct ntfs_args), 863 ntfs_mount, 864 ntfs_start, 865 ntfs_unmount, 866 ntfs_root, 867 (void *)eopnotsupp, /* vfs_quotactl */ 868 ntfs_statvfs, 869 ntfs_sync, 870 ntfs_vget, 871 ntfs_fhtovp, 872 ntfs_vptofh, 873 ntfs_init, 874 ntfs_reinit, 875 ntfs_done, 876 ntfs_mountroot, 877 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 878 vfs_stdextattrctl, 879 (void *)eopnotsupp, /* vfs_suspendctl */ 880 genfs_renamelock_enter, 881 genfs_renamelock_exit, 882 (void *)eopnotsupp, 883 ntfs_vnodeopv_descs, 884 0, 885 { NULL, NULL }, 886 }; 887 888 static int 889 ntfs_modcmd(modcmd_t cmd, void *arg) 890 { 891 int error; 892 893 switch (cmd) { 894 case MODULE_CMD_INIT: 895 error = vfs_attach(&ntfs_vfsops); 896 if (error != 0) 897 break; 898 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 899 CTLFLAG_PERMANENT, 900 CTLTYPE_NODE, "vfs", NULL, 901 NULL, 0, NULL, 0, 902 CTL_VFS, CTL_EOL); 903 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 904 CTLFLAG_PERMANENT, 905 CTLTYPE_NODE, "ntfs", 906 SYSCTL_DESCR("NTFS file system"), 907 NULL, 0, NULL, 0, 908 CTL_VFS, 20, CTL_EOL); 909 /* 910 * XXX the "20" above could be dynamic, thereby eliminating 911 * one more instance of the "number to vfs" mapping problem, 912 * but "20" is the order as taken from sys/mount.h 913 */ 914 break; 915 case MODULE_CMD_FINI: 916 error = vfs_detach(&ntfs_vfsops); 917 if (error != 0) 918 break; 919 sysctl_teardown(&ntfs_sysctl_log); 920 break; 921 default: 922 error = ENOTTY; 923 break; 924 } 925 926 return (error); 927 } 928
Indexes created Wed Sep 24 05:09:52 GMT 2025