ntfs_vfsops.c revision 1.87.20.1
1 /* $NetBSD: ntfs_vfsops.c,v 1.87.20.1 2014/04/21 10:17:48 bouyer 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 1.87.20.1 2014/04/21 10:17:48 bouyer 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 (args == NULL) 178 return EINVAL; 179 if (*data_len < sizeof *args) 180 return EINVAL; 181 182 if (mp->mnt_flag & MNT_GETARGS) { 183 struct ntfsmount *ntmp = VFSTONTFS(mp); 184 if (ntmp == NULL) 185 return EIO; 186 args->fspec = NULL; 187 args->uid = ntmp->ntm_uid; 188 args->gid = ntmp->ntm_gid; 189 args->mode = ntmp->ntm_mode; 190 args->flag = ntmp->ntm_flag; 191 *data_len = sizeof *args; 192 return 0; 193 } 194 /* 195 *** 196 * Mounting non-root file system or updating a file system 197 *** 198 */ 199 200 /* 201 * If updating, check whether changing from read-only to 202 * read/write; if there is no device name, that's all we do. 203 */ 204 if (mp->mnt_flag & MNT_UPDATE) { 205 printf("ntfs_mount(): MNT_UPDATE not supported\n"); 206 return (EINVAL); 207 } 208 209 /* 210 * Not an update, or updating the name: look up the name 211 * and verify that it refers to a sensible block device. 212 */ 213 err = namei_simple_user(args->fspec, 214 NSM_FOLLOW_NOEMULROOT, &devvp); 215 if (err) { 216 /* can't get devvp!*/ 217 return (err); 218 } 219 220 if (devvp->v_type != VBLK) { 221 err = ENOTBLK; 222 goto fail; 223 } 224 if (bdevsw_lookup(devvp->v_rdev) == NULL) { 225 err = ENXIO; 226 goto fail; 227 } 228 if (mp->mnt_flag & MNT_UPDATE) { 229 #if 0 230 /* 231 ******************** 232 * UPDATE 233 ******************** 234 */ 235 236 if (devvp != ntmp->um_devvp) { 237 err = EINVAL; /* needs translation */ 238 goto fail; 239 } 240 241 /* 242 * Update device name only on success 243 */ 244 err = set_statvfs_info(NULL, UIO_USERSPACE, args->fspec, 245 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, p); 246 if (err) 247 goto fail; 248 249 vrele(devvp); 250 #endif 251 } else { 252 /* 253 ******************** 254 * NEW MOUNT 255 ******************** 256 */ 257 258 /* 259 * Since this is a new mount, we want the names for 260 * the device and the mount point copied in. If an 261 * error occurs, the mountpoint is discarded by the 262 * upper level code. 263 */ 264 265 /* Save "last mounted on" info for mount point (NULL pad)*/ 266 err = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 267 UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 268 if (err) 269 goto fail; 270 271 if (mp->mnt_flag & MNT_RDONLY) 272 flags = FREAD; 273 else 274 flags = FREAD|FWRITE; 275 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 276 err = VOP_OPEN(devvp, flags, FSCRED); 277 VOP_UNLOCK(devvp); 278 if (err) 279 goto fail; 280 err = ntfs_mountfs(devvp, mp, args, l); 281 if (err) { 282 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 283 (void)VOP_CLOSE(devvp, flags, NOCRED); 284 VOP_UNLOCK(devvp); 285 goto fail; 286 } 287 } 288 289 /* 290 * Initialize FS stat information in mount struct; uses both 291 * mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname 292 * 293 * This code is common to root and non-root mounts 294 */ 295 (void)VFS_STATVFS(mp, &mp->mnt_stat); 296 return (err); 297 298 fail: 299 vrele(devvp); 300 return (err); 301 } 302 303 /* 304 * Common code for mount and mountroot 305 */ 306 int 307 ntfs_mountfs(struct vnode *devvp, struct mount *mp, struct ntfs_args *argsp, struct lwp *l) 308 { 309 struct buf *bp; 310 struct ntfsmount *ntmp; 311 dev_t dev = devvp->v_rdev; 312 int error, ronly, i; 313 struct vnode *vp; 314 315 ntmp = NULL; 316 317 /* 318 * Flush out any old buffers remaining from a previous use. 319 */ 320 vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); 321 error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0); 322 VOP_UNLOCK(devvp); 323 if (error) 324 return (error); 325 326 ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 327 328 bp = NULL; 329 330 error = bread(devvp, BBLOCK, BBSIZE, NOCRED, 0, &bp); 331 if (error) 332 goto out; 333 ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK|M_ZERO); 334 memcpy( &ntmp->ntm_bootfile, bp->b_data, sizeof(struct bootfile) ); 335 brelse( bp , 0 ); 336 bp = NULL; 337 338 if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) { 339 error = EINVAL; 340 dprintf(("ntfs_mountfs: invalid boot block\n")); 341 goto out; 342 } 343 344 { 345 int8_t cpr = ntmp->ntm_mftrecsz; 346 if( cpr > 0 ) 347 ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr; 348 else 349 ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps; 350 } 351 dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n", 352 ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media, 353 ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec)); 354 dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n", 355 (u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn)); 356 357 ntmp->ntm_mountp = mp; 358 ntmp->ntm_dev = dev; 359 ntmp->ntm_devvp = devvp; 360 ntmp->ntm_uid = argsp->uid; 361 ntmp->ntm_gid = argsp->gid; 362 ntmp->ntm_mode = argsp->mode; 363 ntmp->ntm_flag = argsp->flag; 364 mp->mnt_data = ntmp; 365 366 /* set file name encode/decode hooks XXX utf-8 only for now */ 367 ntmp->ntm_wget = ntfs_utf8_wget; 368 ntmp->ntm_wput = ntfs_utf8_wput; 369 ntmp->ntm_wcmp = ntfs_utf8_wcmp; 370 371 dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n", 372 (ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.", 373 (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"", 374 ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode)); 375 376 /* 377 * We read in some system nodes to do not allow 378 * reclaim them and to have everytime access to them. 379 */ 380 { 381 int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO }; 382 for (i=0; i<3; i++) { 383 error = VFS_VGET(mp, pi[i], &(ntmp->ntm_sysvn[pi[i]])); 384 if(error) 385 goto out1; 386 ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM; 387 vref(ntmp->ntm_sysvn[pi[i]]); 388 vput(ntmp->ntm_sysvn[pi[i]]); 389 } 390 } 391 392 /* read the Unicode lowercase --> uppercase translation table, 393 * if necessary */ 394 if ((error = ntfs_toupper_use(mp, ntmp))) 395 goto out1; 396 397 /* 398 * Scan $BitMap and count free clusters 399 */ 400 error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree); 401 if(error) 402 goto out1; 403 404 /* 405 * Read and translate to internal format attribute 406 * definition file. 407 */ 408 { 409 int num,j; 410 struct attrdef ad; 411 412 /* Open $AttrDef */ 413 error = VFS_VGET(mp, NTFS_ATTRDEFINO, &vp ); 414 if(error) 415 goto out1; 416 417 /* Count valid entries */ 418 for(num=0;;num++) { 419 error = ntfs_readattr(ntmp, VTONT(vp), 420 NTFS_A_DATA, NULL, 421 num * sizeof(ad), sizeof(ad), 422 &ad, NULL); 423 if (error) 424 goto out1; 425 if (ad.ad_name[0] == 0) 426 break; 427 } 428 429 /* Alloc memory for attribute definitions */ 430 ntmp->ntm_ad = (struct ntvattrdef *) malloc( 431 num * sizeof(struct ntvattrdef), 432 M_NTFSMNT, M_WAITOK); 433 434 ntmp->ntm_adnum = num; 435 436 /* Read them and translate */ 437 for(i=0;i<num;i++){ 438 error = ntfs_readattr(ntmp, VTONT(vp), 439 NTFS_A_DATA, NULL, 440 i * sizeof(ad), sizeof(ad), 441 &ad, NULL); 442 if (error) 443 goto out1; 444 j = 0; 445 do { 446 ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j]; 447 } while(ad.ad_name[j++]); 448 ntmp->ntm_ad[i].ad_namelen = j - 1; 449 ntmp->ntm_ad[i].ad_type = ad.ad_type; 450 } 451 452 vput(vp); 453 } 454 455 mp->mnt_stat.f_fsidx.__fsid_val[0] = dev; 456 mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS); 457 mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 458 mp->mnt_stat.f_namemax = NTFS_MAXFILENAME; 459 mp->mnt_flag |= MNT_LOCAL; 460 devvp->v_specmountpoint = mp; 461 return (0); 462 463 out1: 464 for(i=0;i<NTFS_SYSNODESNUM;i++) 465 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]); 466 467 if (vflush(mp,NULLVP,0)) { 468 dprintf(("ntfs_mountfs: vflush failed\n")); 469 } 470 out: 471 devvp->v_specmountpoint = NULL; 472 if (bp) 473 brelse(bp, 0); 474 475 if (error) { 476 if (ntmp) { 477 if (ntmp->ntm_ad) 478 free(ntmp->ntm_ad, M_NTFSMNT); 479 free(ntmp, M_NTFSMNT); 480 } 481 } 482 483 return (error); 484 } 485 486 static int 487 ntfs_start ( 488 struct mount *mp, 489 int flags) 490 { 491 return (0); 492 } 493 494 static int 495 ntfs_unmount( 496 struct mount *mp, 497 int mntflags) 498 { 499 struct lwp *l = curlwp; 500 struct ntfsmount *ntmp; 501 int error, ronly = 0, flags, i; 502 503 dprintf(("ntfs_unmount: unmounting...\n")); 504 ntmp = VFSTONTFS(mp); 505 506 flags = 0; 507 if(mntflags & MNT_FORCE) 508 flags |= FORCECLOSE; 509 510 dprintf(("ntfs_unmount: vflushing...\n")); 511 error = vflush(mp,NULLVP,flags | SKIPSYSTEM); 512 if (error) { 513 dprintf(("ntfs_unmount: vflush failed: %d\n",error)); 514 return (error); 515 } 516 517 /* Check if only system vnodes are rest */ 518 for(i=0;i<NTFS_SYSNODESNUM;i++) 519 if((ntmp->ntm_sysvn[i]) && 520 (ntmp->ntm_sysvn[i]->v_usecount > 1)) return (EBUSY); 521 522 /* Dereference all system vnodes */ 523 for(i=0;i<NTFS_SYSNODESNUM;i++) 524 if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]); 525 526 /* vflush system vnodes */ 527 error = vflush(mp,NULLVP,flags); 528 if (error) { 529 panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error); 530 } 531 532 /* Check if the type of device node isn't VBAD before 533 * touching v_specinfo. If the device vnode is revoked, the 534 * field is NULL and touching it causes null pointer derefercence. 535 */ 536 if (ntmp->ntm_devvp->v_type != VBAD) 537 ntmp->ntm_devvp->v_specmountpoint = NULL; 538 539 vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0); 540 541 /* lock the device vnode before calling VOP_CLOSE() */ 542 vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY); 543 error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE, 544 NOCRED); 545 KASSERT(error == 0); 546 VOP_UNLOCK(ntmp->ntm_devvp); 547 548 vrele(ntmp->ntm_devvp); 549 550 /* free the toupper table, if this has been last mounted ntfs volume */ 551 ntfs_toupper_unuse(); 552 553 dprintf(("ntfs_umount: freeing memory...\n")); 554 mp->mnt_data = NULL; 555 mp->mnt_flag &= ~MNT_LOCAL; 556 free(ntmp->ntm_ad, M_NTFSMNT); 557 free(ntmp, M_NTFSMNT); 558 return (0); 559 } 560 561 static int 562 ntfs_root( 563 struct mount *mp, 564 struct vnode **vpp) 565 { 566 struct vnode *nvp; 567 int error = 0; 568 569 dprintf(("ntfs_root(): sysvn: %p\n", 570 VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO])); 571 error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, &nvp); 572 if(error) { 573 printf("ntfs_root: VFS_VGET failed: %d\n",error); 574 return (error); 575 } 576 577 *vpp = nvp; 578 return (0); 579 } 580 581 int 582 ntfs_calccfree( 583 struct ntfsmount *ntmp, 584 cn_t *cfreep) 585 { 586 struct vnode *vp; 587 u_int8_t *tmp; 588 int j, error; 589 cn_t cfree = 0; 590 size_t bmsize, i; 591 592 vp = ntmp->ntm_sysvn[NTFS_BITMAPINO]; 593 594 bmsize = VTOF(vp)->f_size; 595 596 tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK); 597 598 error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL, 599 0, bmsize, tmp, NULL); 600 if (error) 601 goto out; 602 603 for(i=0;i<bmsize;i++) 604 for(j=0;j<8;j++) 605 if(~tmp[i] & (1 << j)) cfree++; 606 *cfreep = cfree; 607 608 out: 609 free(tmp, M_TEMP); 610 return(error); 611 } 612 613 static int 614 ntfs_statvfs( 615 struct mount *mp, 616 struct statvfs *sbp) 617 { 618 struct ntfsmount *ntmp = VFSTONTFS(mp); 619 u_int64_t mftallocated; 620 621 dprintf(("ntfs_statvfs():\n")); 622 623 mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated; 624 625 sbp->f_bsize = ntmp->ntm_bps; 626 sbp->f_frsize = sbp->f_bsize; /* XXX */ 627 sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc; 628 sbp->f_blocks = ntmp->ntm_bootfile.bf_spv; 629 sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree); 630 sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec; 631 sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) + 632 sbp->f_ffree; 633 sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */ 634 sbp->f_flag = mp->mnt_flag; 635 copy_statvfs_info(sbp, mp); 636 return (0); 637 } 638 639 static int 640 ntfs_sync ( 641 struct mount *mp, 642 int waitfor, 643 kauth_cred_t cred) 644 { 645 /*dprintf(("ntfs_sync():\n"));*/ 646 return (0); 647 } 648 649 /*ARGSUSED*/ 650 static int 651 ntfs_fhtovp( 652 struct mount *mp, 653 struct fid *fhp, 654 struct vnode **vpp) 655 { 656 struct ntfid ntfh; 657 int error; 658 659 if (fhp->fid_len != sizeof(struct ntfid)) 660 return EINVAL; 661 memcpy(&ntfh, fhp, sizeof(ntfh)); 662 ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname, 663 (unsigned long long)ntfh.ntfid_ino)); 664 665 error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, NULL, 666 LK_EXCLUSIVE, 0, vpp); 667 if (error != 0) { 668 *vpp = NULLVP; 669 return (error); 670 } 671 672 /* XXX as unlink/rmdir/mkdir/creat are not currently possible 673 * with NTFS, we don't need to check anything else for now */ 674 return (0); 675 } 676 677 static int 678 ntfs_vptofh( 679 struct vnode *vp, 680 struct fid *fhp, 681 size_t *fh_size) 682 { 683 struct ntnode *ntp; 684 struct ntfid ntfh; 685 struct fnode *fn; 686 687 if (*fh_size < sizeof(struct ntfid)) { 688 *fh_size = sizeof(struct ntfid); 689 return E2BIG; 690 } 691 *fh_size = sizeof(struct ntfid); 692 693 ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname, 694 vp)); 695 696 fn = VTOF(vp); 697 ntp = VTONT(vp); 698 memset(&ntfh, 0, sizeof(ntfh)); 699 ntfh.ntfid_len = sizeof(struct ntfid); 700 ntfh.ntfid_ino = ntp->i_number; 701 ntfh.ntfid_attr = fn->f_attrtype; 702 #ifdef notyet 703 ntfh.ntfid_gen = ntp->i_gen; 704 #endif 705 memcpy(fhp, &ntfh, sizeof(ntfh)); 706 return (0); 707 } 708 709 int 710 ntfs_vgetex( 711 struct mount *mp, 712 ino_t ino, 713 u_int32_t attrtype, 714 char *attrname, 715 u_long lkflags, 716 u_long flags, 717 struct vnode **vpp) 718 { 719 int error; 720 struct ntfsmount *ntmp; 721 struct ntnode *ip; 722 struct fnode *fp; 723 struct vnode *vp; 724 enum vtype f_type = VBAD; 725 726 dprintf(("ntfs_vgetex: ino: %llu, attr: 0x%x:%s, lkf: 0x%lx, f:" 727 " 0x%lx\n", (unsigned long long)ino, attrtype, 728 attrname ? attrname : "", (u_long)lkflags, (u_long)flags)); 729 730 ntmp = VFSTONTFS(mp); 731 *vpp = NULL; 732 733 loop: 734 /* Get ntnode */ 735 error = ntfs_ntlookup(ntmp, ino, &ip); 736 if (error) { 737 printf("ntfs_vget: ntfs_ntget failed\n"); 738 return (error); 739 } 740 741 /* It may be not initialized fully, so force load it */ 742 if (!(flags & VG_DONTLOADIN) && !(ip->i_flag & IN_LOADED)) { 743 error = ntfs_loadntnode(ntmp, ip); 744 if(error) { 745 printf("ntfs_vget: CAN'T LOAD ATTRIBUTES FOR INO:" 746 " %llu\n", (unsigned long long)ip->i_number); 747 ntfs_ntput(ip); 748 return (error); 749 } 750 } 751 752 error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp); 753 if (error) { 754 printf("ntfs_vget: ntfs_fget failed\n"); 755 ntfs_ntput(ip); 756 return (error); 757 } 758 759 if (!(flags & VG_DONTVALIDFN) && !(fp->f_flag & FN_VALID)) { 760 if ((ip->i_frflag & NTFS_FRFLAG_DIR) && 761 (fp->f_attrtype == NTFS_A_DATA && fp->f_attrname == NULL)) { 762 f_type = VDIR; 763 } else if (flags & VG_EXT) { 764 f_type = VNON; 765 fp->f_size = fp->f_allocated = 0; 766 } else { 767 f_type = VREG; 768 769 error = ntfs_filesize(ntmp, fp, 770 &fp->f_size, &fp->f_allocated); 771 if (error) { 772 ntfs_ntput(ip); 773 return (error); 774 } 775 } 776 777 fp->f_flag |= FN_VALID; 778 } 779 780 /* 781 * We may be calling vget() now. To avoid potential deadlock, we need 782 * to release ntnode lock, since due to locking order vnode 783 * lock has to be acquired first. 784 * ntfs_fget() bumped ntnode usecount, so ntnode won't be recycled 785 * prematurely. 786 * Take v_interlock before releasing ntnode lock to avoid races. 787 */ 788 vp = FTOV(fp); 789 if (vp) { 790 mutex_enter(vp->v_interlock); 791 ntfs_ntput(ip); 792 if (vget(vp, lkflags) != 0) 793 goto loop; 794 *vpp = vp; 795 return 0; 796 } 797 ntfs_ntput(ip); 798 799 error = getnewvnode(VT_NTFS, ntmp->ntm_mountp, ntfs_vnodeop_p, 800 NULL, &vp); 801 if(error) { 802 ntfs_frele(fp); 803 return (error); 804 } 805 ntfs_ntget(ip); 806 error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp); 807 if (error) { 808 printf("ntfs_vget: ntfs_fget failed\n"); 809 ntfs_ntput(ip); 810 return (error); 811 } 812 if (FTOV(fp)) { 813 /* 814 * Another thread beat us, put back freshly allocated 815 * vnode and retry. 816 */ 817 ntfs_ntput(ip); 818 ungetnewvnode(vp); 819 goto loop; 820 } 821 dprintf(("ntfs_vget: vnode: %p for ntnode: %llu\n", vp, 822 (unsigned long long)ino)); 823 824 fp->f_vp = vp; 825 vp->v_data = fp; 826 if (f_type != VBAD) 827 vp->v_type = f_type; 828 genfs_node_init(vp, &ntfs_genfsops); 829 830 if (ino == NTFS_ROOTINO) 831 vp->v_vflag |= VV_ROOT; 832 833 ntfs_ntput(ip); 834 835 if (lkflags & (LK_EXCLUSIVE | LK_SHARED)) { 836 error = vn_lock(vp, lkflags); 837 if (error) { 838 vput(vp); 839 return (error); 840 } 841 } 842 843 uvm_vnp_setsize(vp, fp->f_size); /* XXX: mess, cf. ntfs_lookupfile() */ 844 vref(ip->i_devvp); 845 *vpp = vp; 846 return (0); 847 } 848 849 static int 850 ntfs_vget( 851 struct mount *mp, 852 ino_t ino, 853 struct vnode **vpp) 854 { 855 return ntfs_vgetex(mp, ino, NTFS_A_DATA, NULL, LK_EXCLUSIVE, 0, vpp); 856 } 857 858 extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc; 859 860 const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = { 861 &ntfs_vnodeop_opv_desc, 862 NULL, 863 }; 864 865 struct vfsops ntfs_vfsops = { 866 MOUNT_NTFS, 867 sizeof (struct ntfs_args), 868 ntfs_mount, 869 ntfs_start, 870 ntfs_unmount, 871 ntfs_root, 872 (void *)eopnotsupp, /* vfs_quotactl */ 873 ntfs_statvfs, 874 ntfs_sync, 875 ntfs_vget, 876 ntfs_fhtovp, 877 ntfs_vptofh, 878 ntfs_init, 879 ntfs_reinit, 880 ntfs_done, 881 ntfs_mountroot, 882 (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 883 vfs_stdextattrctl, 884 (void *)eopnotsupp, /* vfs_suspendctl */ 885 genfs_renamelock_enter, 886 genfs_renamelock_exit, 887 (void *)eopnotsupp, 888 ntfs_vnodeopv_descs, 889 0, 890 { NULL, NULL }, 891 }; 892 893 static int 894 ntfs_modcmd(modcmd_t cmd, void *arg) 895 { 896 int error; 897 898 switch (cmd) { 899 case MODULE_CMD_INIT: 900 error = vfs_attach(&ntfs_vfsops); 901 if (error != 0) 902 break; 903 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 904 CTLFLAG_PERMANENT, 905 CTLTYPE_NODE, "vfs", NULL, 906 NULL, 0, NULL, 0, 907 CTL_VFS, CTL_EOL); 908 sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL, 909 CTLFLAG_PERMANENT, 910 CTLTYPE_NODE, "ntfs", 911 SYSCTL_DESCR("NTFS file system"), 912 NULL, 0, NULL, 0, 913 CTL_VFS, 20, CTL_EOL); 914 /* 915 * XXX the "20" above could be dynamic, thereby eliminating 916 * one more instance of the "number to vfs" mapping problem, 917 * but "20" is the order as taken from sys/mount.h 918 */ 919 break; 920 case MODULE_CMD_FINI: 921 error = vfs_detach(&ntfs_vfsops); 922 if (error != 0) 923 break; 924 sysctl_teardown(&ntfs_sysctl_log); 925 break; 926 default: 927 error = ENOTTY; 928 break; 929 } 930 931 return (error); 932 } 933
Indexes created Wed Oct 01 15:09:59 GMT 2025