ntfs_vfsops.c revision 1.87
1 /* $NetBSD: ntfs_vfsops.c,v 1.87 2011/11/14 18:35:13 hannken 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 1.87 2011/11/14 18:35:13 hannken 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 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 274 err = VOP_OPEN(devvp, flags, FSCRED); 275 VOP_UNLOCK(devvp); 276 if (err) 277 goto fail; 278 err = ntfs_mountfs(devvp, mp, args, l); 279 if (err) { 280 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 281 (void)VOP_CLOSE(devvp, flags, NOCRED); 282 VOP_UNLOCK(devvp); 283 goto fail; 284 } 285 } 286 287 /* 288 * Initialize FS stat information in mount struct; uses both 289 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname 290 * 291 * This code is common to root and non-root mounts 292 */ 293 (void)VFS_STATVFS(mp, &mp->mnt_stat); 294 return (err); 295 296 fail: 297 vrele(devvp); 298 return (err); 299 } 300 301 /* 302 * Common code for mount and mountroot 303 */ 304 int 305 ntfs_mountfs(struct vnode *devvp, struct mount *mp, struct ntfs_args *argsp, struct lwp *l) 306 { 307 struct buf *bp; 308 struct ntfsmount *ntmp; 309 dev_t dev = devvp->v_rdev; 310 int error, ronly, i; 311 struct vnode *vp; 312 313 ntmp = NULL; 314 315 /* 316 * Flush out any old buffers remaining from a previous use. 317 */ 318 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 319 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 320 VOP_UNLOCK(devvp); 321 if (error) 322 return (error); 323 324 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 325 326 bp = NULL; 327 328 error = bread(devvp, BBLOCK, BBSIZE, NOCRED, 0, &bp); 329 if (error) 330 goto out; 331 ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK|M_ZERO); 332 memcpy( &ntmp->ntm_bootfile, bp->b_data, sizeof(struct bootfile) ); 333 brelse( bp , 0 ); 334 bp = NULL; 335 336 if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) { 337 error = EINVAL; 338 dprintf(("ntfs_mountfs: invalid boot block\n")); 339 goto out; 340 } 341 342 { 343 int8_t cpr = ntmp->ntm_mftrecsz; 344 if( cpr > 0 ) 345 ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr; 346 else 347 ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps; 348 } 349 dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n", 350 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media, 351 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec)); 352 dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n", 353 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn)); 354 355 ntmp->ntm_mountp = mp; 356 ntmp->ntm_dev = dev; 357 ntmp->ntm_devvp = devvp; 358 ntmp->ntm_uid = argsp->uid; 359 ntmp->ntm_gid = argsp->gid; 360 ntmp->ntm_mode = argsp->mode; 361 ntmp->ntm_flag = argsp->flag; 362 mp->mnt_data = ntmp; 363 364 /* set file name encode/decode hooks XXX utf-8 only for now */ 365 ntmp->ntm_wget = ntfs_utf8_wget; 366 ntmp->ntm_wput = ntfs_utf8_wput; 367 ntmp->ntm_wcmp = ntfs_utf8_wcmp; 368 369 dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n", 370 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.", 371 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"", 372 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode)); 373 374 /* 375 * We read in some system nodes to do not allow 376 * reclaim them and to have everytime access to them. 377 */ 378 { 379 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO }; 380 for (i=0; i<3; i++) { 381 error = VFS_VGET(mp, pi[i], &(ntmp->ntm_sysvn[pi[i]])); 382 if(error) 383 goto out1; 384 ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM; 385 vref(ntmp->ntm_sysvn[pi[i]]); 386 vput(ntmp->ntm_sysvn[pi[i]]); 387 } 388 } 389 390 /* read the Unicode lowercase --> uppercase translation table, 391 * if necessary */ 392 if ((error = ntfs_toupper_use(mp, ntmp))) 393 goto out1; 394 395 /* 396 * Scan $BitMap and count free clusters 397 */ 398 error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree); 399 if(error) 400 goto out1; 401 402 /* 403 * Read and translate to internal format attribute 404 * definition file. 405 */ 406 { 407 int num,j; 408 struct attrdef ad; 409 410 /* Open $AttrDef */ 411 error = VFS_VGET(mp, NTFS_ATTRDEFINO, &vp ); 412 if(error) 413 goto out1; 414 415 /* Count valid entries */ 416 for(num=0;;num++) { 417 error = ntfs_readattr(ntmp, VTONT(vp), 418 NTFS_A_DATA, NULL, 419 num * sizeof(ad), sizeof(ad), 420 &ad, NULL); 421 if (error) 422 goto out1; 423 if (ad.ad_name[0] == 0) 424 break; 425 } 426 427 /* Alloc memory for attribute definitions */ 428 ntmp->ntm_ad = (struct ntvattrdef *) malloc( 429 num * sizeof(struct ntvattrdef), 430 M_NTFSMNT, M_WAITOK); 431 432 ntmp->ntm_adnum = num; 433 434 /* Read them and translate */ 435 for(i=0;i<num;i++){ 436 error = ntfs_readattr(ntmp, VTONT(vp), 437 NTFS_A_DATA, NULL, 438 i * sizeof(ad), sizeof(ad), 439 &ad, NULL); 440 if (error) 441 goto out1; 442 j = 0; 443 do { 444 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j]; 445 } while(ad.ad_name[j++]); 446 ntmp->ntm_ad[i].ad_namelen = j - 1; 447 ntmp->ntm_ad[i].ad_type = ad.ad_type; 448 } 449 450 vput(vp); 451 } 452 453 mp->mnt_stat.f_fsidx.__fsid_val[0] = dev; 454 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS); 455 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 456 mp->mnt_stat.f_namemax = NTFS_MAXFILENAME; 457 mp->mnt_flag |= MNT_LOCAL; 458 devvp->v_specmountpoint = mp; 459 return (0); 460 461 out1: 462 for(i=0;i<NTFS_SYSNODESNUM;i++) 463 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]); 464 465 if (vflush(mp,NULLVP,0)) { 466 dprintf(("ntfs_mountfs: vflush failed\n")); 467 } 468 out: 469 devvp->v_specmountpoint = NULL; 470 if (bp) 471 brelse(bp, 0); 472 473 if (error) { 474 if (ntmp) { 475 if (ntmp->ntm_ad) 476 free(ntmp->ntm_ad, M_NTFSMNT); 477 free(ntmp, M_NTFSMNT); 478 } 479 } 480 481 return (error); 482 } 483 484 static int 485 ntfs_start ( 486 struct mount *mp, 487 int flags) 488 { 489 return (0); 490 } 491 492 static int 493 ntfs_unmount( 494 struct mount *mp, 495 int mntflags) 496 { 497 struct lwp *l = curlwp; 498 struct ntfsmount *ntmp; 499 int error, ronly = 0, flags, i; 500 501 dprintf(("ntfs_unmount: unmounting...\n")); 502 ntmp = VFSTONTFS(mp); 503 504 flags = 0; 505 if(mntflags & MNT_FORCE) 506 flags |= FORCECLOSE; 507 508 dprintf(("ntfs_unmount: vflushing...\n")); 509 error = vflush(mp,NULLVP,flags | SKIPSYSTEM); 510 if (error) { 511 dprintf(("ntfs_unmount: vflush failed: %d\n",error)); 512 return (error); 513 } 514 515 /* Check if only system vnodes are rest */ 516 for(i=0;i<NTFS_SYSNODESNUM;i++) 517 if((ntmp->ntm_sysvn[i]) && 518 (ntmp->ntm_sysvn[i]->v_usecount > 1)) return (EBUSY); 519 520 /* Dereference all system vnodes */ 521 for(i=0;i<NTFS_SYSNODESNUM;i++) 522 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]); 523 524 /* vflush system vnodes */ 525 error = vflush(mp,NULLVP,flags); 526 if (error) { 527 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error); 528 } 529 530 /* Check if the type of device node isn't VBAD before 531 * touching v_specinfo. If the device vnode is revoked, the 532 * field is NULL and touching it causes null pointer derefercence. 533 */ 534 if (ntmp->ntm_devvp->v_type != VBAD) 535 ntmp->ntm_devvp->v_specmountpoint = NULL; 536 537 vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0); 538 539 /* lock the device vnode before calling VOP_CLOSE() */ 540 vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY); 541 error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE, 542 NOCRED); 543 KASSERT(error == 0); 544 VOP_UNLOCK(ntmp->ntm_devvp); 545 546 vrele(ntmp->ntm_devvp); 547 548 /* free the toupper table, if this has been last mounted ntfs volume */ 549 ntfs_toupper_unuse(); 550 551 dprintf(("ntfs_umount: freeing memory...\n")); 552 mp->mnt_data = NULL; 553 mp->mnt_flag &= ~MNT_LOCAL; 554 free(ntmp->ntm_ad, M_NTFSMNT); 555 free(ntmp, M_NTFSMNT); 556 return (0); 557 } 558 559 static int 560 ntfs_root( 561 struct mount *mp, 562 struct vnode **vpp) 563 { 564 struct vnode *nvp; 565 int error = 0; 566 567 dprintf(("ntfs_root(): sysvn: %p\n", 568 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO])); 569 error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, &nvp); 570 if(error) { 571 printf("ntfs_root: VFS_VGET failed: %d\n",error); 572 return (error); 573 } 574 575 *vpp = nvp; 576 return (0); 577 } 578 579 int 580 ntfs_calccfree( 581 struct ntfsmount *ntmp, 582 cn_t *cfreep) 583 { 584 struct vnode *vp; 585 u_int8_t *tmp; 586 int j, error; 587 cn_t cfree = 0; 588 size_t bmsize, i; 589 590 vp = ntmp->ntm_sysvn[NTFS_BITMAPINO]; 591 592 bmsize = VTOF(vp)->f_size; 593 594 tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK); 595 596 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 597 0, bmsize, tmp, NULL); 598 if (error) 599 goto out; 600 601 for(i=0;i<bmsize;i++) 602 for(j=0;j<8;j++) 603 if(~tmp[i] & (1 << j)) cfree++; 604 *cfreep = cfree; 605 606 out: 607 free(tmp, M_TEMP); 608 return(error); 609 } 610 611 static int 612 ntfs_statvfs( 613 struct mount *mp, 614 struct statvfs *sbp) 615 { 616 struct ntfsmount *ntmp = VFSTONTFS(mp); 617 u_int64_t mftallocated; 618 619 dprintf(("ntfs_statvfs():\n")); 620 621 mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated; 622 623 sbp->f_bsize = ntmp->ntm_bps; 624 sbp->f_frsize = sbp->f_bsize; /* XXX */ 625 sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc; 626 sbp->f_blocks = ntmp->ntm_bootfile.bf_spv; 627 sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree); 628 sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec; 629 sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) + 630 sbp->f_ffree; 631 sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */ 632 sbp->f_flag = mp->mnt_flag; 633 copy_statvfs_info(sbp, mp); 634 return (0); 635 } 636 637 static int 638 ntfs_sync ( 639 struct mount *mp, 640 int waitfor, 641 kauth_cred_t cred) 642 { 643 /*dprintf(("ntfs_sync():\n"));*/ 644 return (0); 645 } 646 647 /*ARGSUSED*/ 648 static int 649 ntfs_fhtovp( 650 struct mount *mp, 651 struct fid *fhp, 652 struct vnode **vpp) 653 { 654 struct ntfid ntfh; 655 int error; 656 657 if (fhp->fid_len != sizeof(struct ntfid)) 658 return EINVAL; 659 memcpy(&ntfh, fhp, sizeof(ntfh)); 660 ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname, 661 (unsigned long long)ntfh.ntfid_ino)); 662 663 error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, NULL, 664 LK_EXCLUSIVE, 0, vpp); 665 if (error != 0) { 666 *vpp = NULLVP; 667 return (error); 668 } 669 670 /* XXX as unlink/rmdir/mkdir/creat are not currently possible 671 * with NTFS, we don't need to check anything else for now */ 672 return (0); 673 } 674 675 static int 676 ntfs_vptofh( 677 struct vnode *vp, 678 struct fid *fhp, 679 size_t *fh_size) 680 { 681 struct ntnode *ntp; 682 struct ntfid ntfh; 683 struct fnode *fn; 684 685 if (*fh_size < sizeof(struct ntfid)) { 686 *fh_size = sizeof(struct ntfid); 687 return E2BIG; 688 } 689 *fh_size = sizeof(struct ntfid); 690 691 ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname, 692 vp)); 693 694 fn = VTOF(vp); 695 ntp = VTONT(vp); 696 memset(&ntfh, 0, sizeof(ntfh)); 697 ntfh.ntfid_len = sizeof(struct ntfid); 698 ntfh.ntfid_ino = ntp->i_number; 699 ntfh.ntfid_attr = fn->f_attrtype; 700 #ifdef notyet 701 ntfh.ntfid_gen = ntp->i_gen; 702 #endif 703 memcpy(fhp, &ntfh, sizeof(ntfh)); 704 return (0); 705 } 706 707 int 708 ntfs_vgetex( 709 struct mount *mp, 710 ino_t ino, 711 u_int32_t attrtype, 712 char *attrname, 713 u_long lkflags, 714 u_long flags, 715 struct vnode **vpp) 716 { 717 int error; 718 struct ntfsmount *ntmp; 719 struct ntnode *ip; 720 struct fnode *fp; 721 struct vnode *vp; 722 enum vtype f_type = VBAD; 723 724 dprintf(("ntfs_vgetex: ino: %llu, attr: 0x%x:%s, lkf: 0x%lx, f:" 725 " 0x%lx\n", (unsigned long long)ino, attrtype, 726 attrname ? attrname : "", (u_long)lkflags, (u_long)flags)); 727 728 ntmp = VFSTONTFS(mp); 729 *vpp = NULL; 730 731 loop: 732 /* Get ntnode */ 733 error = ntfs_ntlookup(ntmp, ino, &ip); 734 if (error) { 735 printf("ntfs_vget: ntfs_ntget failed\n"); 736 return (error); 737 } 738 739 /* It may be not initialized fully, so force load it */ 740 if (!(flags & VG_DONTLOADIN) && !(ip->i_flag & IN_LOADED)) { 741 error = ntfs_loadntnode(ntmp, ip); 742 if(error) { 743 printf("ntfs_vget: CAN'T LOAD ATTRIBUTES FOR INO:" 744 " %llu\n", (unsigned long long)ip->i_number); 745 ntfs_ntput(ip); 746 return (error); 747 } 748 } 749 750 error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp); 751 if (error) { 752 printf("ntfs_vget: ntfs_fget failed\n"); 753 ntfs_ntput(ip); 754 return (error); 755 } 756 757 if (!(flags & VG_DONTVALIDFN) && !(fp->f_flag & FN_VALID)) { 758 if ((ip->i_frflag & NTFS_FRFLAG_DIR) && 759 (fp->f_attrtype == NTFS_A_DATA && fp->f_attrname == NULL)) { 760 f_type = VDIR; 761 } else if (flags & VG_EXT) { 762 f_type = VNON; 763 fp->f_size = fp->f_allocated = 0; 764 } else { 765 f_type = VREG; 766 767 error = ntfs_filesize(ntmp, fp, 768 &fp->f_size, &fp->f_allocated); 769 if (error) { 770 ntfs_ntput(ip); 771 return (error); 772 } 773 } 774 775 fp->f_flag |= FN_VALID; 776 } 777 778 /* 779 * We may be calling vget() now. To avoid potential deadlock, we need 780 * to release ntnode lock, since due to locking order vnode 781 * lock has to be acquired first. 782 * ntfs_fget() bumped ntnode usecount, so ntnode won't be recycled 783 * prematurely. 784 * Take v_interlock before releasing ntnode lock to avoid races. 785 */ 786 vp = FTOV(fp); 787 if (vp) { 788 mutex_enter(vp->v_interlock); 789 ntfs_ntput(ip); 790 if (vget(vp, lkflags) != 0) 791 goto loop; 792 *vpp = vp; 793 return 0; 794 } 795 ntfs_ntput(ip); 796 797 error = getnewvnode(VT_NTFS, ntmp->ntm_mountp, ntfs_vnodeop_p, 798 NULL, &vp); 799 if(error) { 800 ntfs_frele(fp); 801 return (error); 802 } 803 ntfs_ntget(ip); 804 error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp); 805 if (error) { 806 printf("ntfs_vget: ntfs_fget failed\n"); 807 ntfs_ntput(ip); 808 return (error); 809 } 810 if (FTOV(fp)) { 811 /* 812 * Another thread beat us, put back freshly allocated 813 * vnode and retry. 814 */ 815 ntfs_ntput(ip); 816 ungetnewvnode(vp); 817 goto loop; 818 } 819 dprintf(("ntfs_vget: vnode: %p for ntnode: %llu\n", vp, 820 (unsigned long long)ino)); 821 822 fp->f_vp = vp; 823 vp->v_data = fp; 824 if (f_type != VBAD) 825 vp->v_type = f_type; 826 genfs_node_init(vp, &ntfs_genfsops); 827 828 if (ino == NTFS_ROOTINO) 829 vp->v_vflag |= VV_ROOT; 830 831 ntfs_ntput(ip); 832 833 if (lkflags & (LK_EXCLUSIVE | LK_SHARED)) { 834 error = vn_lock(vp, lkflags); 835 if (error) { 836 vput(vp); 837 return (error); 838 } 839 } 840 841 uvm_vnp_setsize(vp, fp->f_size); /* XXX: mess, cf. ntfs_lookupfile() */ 842 vref(ip->i_devvp); 843 *vpp = vp; 844 return (0); 845 } 846 847 static int 848 ntfs_vget( 849 struct mount *mp, 850 ino_t ino, 851 struct vnode **vpp) 852 { 853 return ntfs_vgetex(mp, ino, NTFS_A_DATA, NULL, LK_EXCLUSIVE, 0, vpp); 854 } 855 856 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc; 857 858 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = { 859 &ntfs_vnodeop_opv_desc, 860 NULL, 861 }; 862 863 struct vfsops ntfs_vfsops = { 864 MOUNT_NTFS, 865 sizeof (struct ntfs_args), 866 ntfs_mount, 867 ntfs_start, 868 ntfs_unmount, 869 ntfs_root, 870 (void *)eopnotsupp, /* vfs_quotactl */ 871 ntfs_statvfs, 872 ntfs_sync, 873 ntfs_vget, 874 ntfs_fhtovp, 875 ntfs_vptofh, 876 ntfs_init, 877 ntfs_reinit, 878 ntfs_done, 879 ntfs_mountroot, 880 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 881 vfs_stdextattrctl, 882 (void *)eopnotsupp, /* vfs_suspendctl */ 883 genfs_renamelock_enter, 884 genfs_renamelock_exit, 885 (void *)eopnotsupp, 886 ntfs_vnodeopv_descs, 887 0, 888 { NULL, NULL }, 889 }; 890 891 static int 892 ntfs_modcmd(modcmd_t cmd, void *arg) 893 { 894 int error; 895 896 switch (cmd) { 897 case MODULE_CMD_INIT: 898 error = vfs_attach(&ntfs_vfsops); 899 if (error != 0) 900 break; 901 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 902 CTLFLAG_PERMANENT, 903 CTLTYPE_NODE, "vfs", NULL, 904 NULL, 0, NULL, 0, 905 CTL_VFS, CTL_EOL); 906 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 907 CTLFLAG_PERMANENT, 908 CTLTYPE_NODE, "ntfs", 909 SYSCTL_DESCR("NTFS file system"), 910 NULL, 0, NULL, 0, 911 CTL_VFS, 20, CTL_EOL); 912 /* 913 * XXX the "20" above could be dynamic, thereby eliminating 914 * one more instance of the "number to vfs" mapping problem, 915 * but "20" is the order as taken from sys/mount.h 916 */ 917 break; 918 case MODULE_CMD_FINI: 919 error = vfs_detach(&ntfs_vfsops); 920 if (error != 0) 921 break; 922 sysctl_teardown(&ntfs_sysctl_log); 923 break; 924 default: 925 error = ENOTTY; 926 break; 927 } 928 929 return (error); 930 } 931
Indexes created Mon Sep 22 10:09:38 GMT 2025