1 /* $NetBSD: ntfs_vnops.c,v 1.47 2010/06/24 13:03:10 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * John Heidemann of the UCLA Ficus project. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Id: ntfs_vnops.c,v 1.5 1999/05/12 09:43:06 semenu Exp 35 * 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: ntfs_vnops.c,v 1.47 2010/06/24 13:03:10 hannken Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/time.h> 45 #include <sys/stat.h> 46 #include <sys/vnode.h> 47 #include <sys/mount.h> 48 #include <sys/namei.h> 49 #include <sys/malloc.h> 50 #include <sys/buf.h> 51 #include <sys/dirent.h> 52 #include <sys/kauth.h> 53 #include <sys/sysctl.h> 54 55 56 #include <fs/ntfs/ntfs.h> 57 #include <fs/ntfs/ntfs_inode.h> 58 #include <fs/ntfs/ntfs_subr.h> 59 #include <miscfs/specfs/specdev.h> 60 #include <miscfs/genfs/genfs.h> 61 62 #include <sys/unistd.h> /* for pathconf(2) constants */ 63 64 static int ntfs_bypass(void *); 65 static int ntfs_read(void *); 66 static int ntfs_write(void *); 67 static int ntfs_getattr(void *); 68 static int ntfs_inactive(void *); 69 static int ntfs_print(void *); 70 static int ntfs_reclaim(void *); 71 static int ntfs_strategy(void *); 72 static int ntfs_access(void *); 73 static int ntfs_open(void *); 74 static int ntfs_close(void *); 75 static int ntfs_readdir(void *); 76 static int ntfs_lookup(void *); 77 static int ntfs_bmap(void *); 78 static int ntfs_fsync(void *); 79 static int ntfs_pathconf(void *); 80 81 extern int prtactive; 82 83 /* 84 * This is a noop, simply returning what one has been given. 85 */ 86 int 87 ntfs_bmap(void *v) 88 { 89 struct vop_bmap_args /* { 90 struct vnode *a_vp; 91 daddr_t a_bn; 92 struct vnode **a_vpp; 93 daddr_t *a_bnp; 94 int *a_runp; 95 int *a_runb; 96 } */ *ap = v; 97 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 98 if (ap->a_vpp != NULL) 99 *ap->a_vpp = ap->a_vp; 100 if (ap->a_bnp != NULL) 101 *ap->a_bnp = ap->a_bn; 102 if (ap->a_runp != NULL) 103 *ap->a_runp = 0; 104 return (0); 105 } 106 107 static int 108 ntfs_read(void *v) 109 { 110 struct vop_read_args /* { 111 struct vnode *a_vp; 112 struct uio *a_uio; 113 int a_ioflag; 114 kauth_cred_t a_cred; 115 } */ *ap = v; 116 struct vnode *vp = ap->a_vp; 117 struct fnode *fp = VTOF(vp); 118 struct ntnode *ip = FTONT(fp); 119 struct uio *uio = ap->a_uio; 120 struct ntfsmount *ntmp = ip->i_mp; 121 u_int64_t toread; 122 int error; 123 124 dprintf(("ntfs_read: ino: %llu, off: %qd resid: %qd\n", 125 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 126 (long long)uio->uio_resid)); 127 128 dprintf(("ntfs_read: filesize: %qu",(long long)fp->f_size)); 129 130 /* don't allow reading after end of file */ 131 if (uio->uio_offset > fp->f_size) 132 toread = 0; 133 else 134 toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset ); 135 136 dprintf((", toread: %qu\n",(long long)toread)); 137 138 if (toread == 0) 139 return (0); 140 141 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 142 fp->f_attrname, uio->uio_offset, toread, NULL, uio); 143 if (error) { 144 printf("ntfs_read: ntfs_readattr failed: %d\n",error); 145 return (error); 146 } 147 148 return (0); 149 } 150 151 static int 152 ntfs_bypass(void *v) 153 { 154 struct vop_generic_args /* { 155 struct vnodeop_desc *a_desc; 156 <other random data follows, presumably> 157 } */ *ap __unused = v; 158 int error = ENOTTY; 159 dprintf(("ntfs_bypass: %s\n", ap->a_desc->vdesc_name)); 160 return (error); 161 } 162 163 164 static int 165 ntfs_getattr(void *v) 166 { 167 struct vop_getattr_args /* { 168 struct vnode *a_vp; 169 struct vattr *a_vap; 170 kauth_cred_t a_cred; 171 } */ *ap = v; 172 struct vnode *vp = ap->a_vp; 173 struct fnode *fp = VTOF(vp); 174 struct ntnode *ip = FTONT(fp); 175 struct vattr *vap = ap->a_vap; 176 177 dprintf(("ntfs_getattr: %llu, flags: %d\n", 178 (unsigned long long)ip->i_number, ip->i_flag)); 179 180 vap->va_fsid = ip->i_dev; 181 vap->va_fileid = ip->i_number; 182 vap->va_mode = ip->i_mp->ntm_mode; 183 vap->va_nlink = ip->i_nlink; 184 vap->va_uid = ip->i_mp->ntm_uid; 185 vap->va_gid = ip->i_mp->ntm_gid; 186 vap->va_rdev = 0; /* XXX UNODEV ? */ 187 vap->va_size = fp->f_size; 188 vap->va_bytes = fp->f_allocated; 189 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 190 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 191 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 192 vap->va_flags = ip->i_flag; 193 vap->va_gen = 0; 194 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 195 vap->va_type = vp->v_type; 196 vap->va_filerev = 0; 197 return (0); 198 } 199 200 201 /* 202 * Last reference to an ntnode. If necessary, write or delete it. 203 */ 204 int 205 ntfs_inactive(void *v) 206 { 207 struct vop_inactive_args /* { 208 struct vnode *a_vp; 209 } */ *ap = v; 210 struct vnode *vp = ap->a_vp; 211 #ifdef NTFS_DEBUG 212 struct ntnode *ip = VTONT(vp); 213 #endif 214 215 dprintf(("ntfs_inactive: vnode: %p, ntnode: %llu\n", vp, 216 (unsigned long long)ip->i_number)); 217 218 VOP_UNLOCK(vp); 219 220 /* XXX since we don't support any filesystem changes 221 * right now, nothing more needs to be done 222 */ 223 return (0); 224 } 225 226 /* 227 * Reclaim an fnode/ntnode so that it can be used for other purposes. 228 */ 229 int 230 ntfs_reclaim(void *v) 231 { 232 struct vop_reclaim_args /* { 233 struct vnode *a_vp; 234 } */ *ap = v; 235 struct vnode *vp = ap->a_vp; 236 struct fnode *fp = VTOF(vp); 237 struct ntnode *ip = FTONT(fp); 238 int error; 239 240 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %llu\n", vp, 241 (unsigned long long)ip->i_number)); 242 243 if (prtactive && vp->v_usecount > 1) 244 vprint("ntfs_reclaim: pushing active", vp); 245 246 if ((error = ntfs_ntget(ip)) != 0) 247 return (error); 248 249 /* Purge old data structures associated with the inode. */ 250 cache_purge(vp); 251 if (ip->i_devvp) { 252 vrele(ip->i_devvp); 253 ip->i_devvp = NULL; 254 } 255 256 genfs_node_destroy(vp); 257 ntfs_frele(fp); 258 ntfs_ntput(ip); 259 vp->v_data = NULL; 260 261 return (0); 262 } 263 264 static int 265 ntfs_print(void *v) 266 { 267 struct vop_print_args /* { 268 struct vnode *a_vp; 269 } */ *ap = v; 270 struct ntnode *ip = VTONT(ap->a_vp); 271 272 printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n", 273 (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount, 274 ip->i_nlink); 275 printf(" "); 276 printf("\n"); 277 return (0); 278 } 279 280 /* 281 * Calculate the logical to physical mapping if not done already, 282 * then call the device strategy routine. 283 */ 284 int 285 ntfs_strategy(void *v) 286 { 287 struct vop_strategy_args /* { 288 struct vnode *a_vp; 289 struct buf *a_bp; 290 } */ *ap = v; 291 struct buf *bp = ap->a_bp; 292 struct vnode *vp = ap->a_vp; 293 struct fnode *fp = VTOF(vp); 294 struct ntnode *ip = FTONT(fp); 295 struct ntfsmount *ntmp = ip->i_mp; 296 int error; 297 298 dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n", 299 (u_int32_t)bp->b_blkno, 300 (u_int32_t)bp->b_lblkno)); 301 302 dprintf(("strategy: bcount: %u flags: 0x%x\n", 303 (u_int32_t)bp->b_bcount,bp->b_flags)); 304 305 if (bp->b_flags & B_READ) { 306 u_int32_t toread; 307 308 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { 309 clrbuf(bp); 310 error = 0; 311 } else { 312 toread = MIN(bp->b_bcount, 313 fp->f_size - ntfs_cntob(bp->b_blkno)); 314 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 315 toread,(u_int32_t)fp->f_size)); 316 317 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 318 fp->f_attrname, ntfs_cntob(bp->b_blkno), 319 toread, bp->b_data, NULL); 320 321 if (error) { 322 printf("ntfs_strategy: ntfs_readattr failed\n"); 323 bp->b_error = error; 324 } 325 326 memset((char *)bp->b_data + toread, 0, 327 bp->b_bcount - toread); 328 } 329 } else { 330 size_t tmp; 331 u_int32_t towrite; 332 333 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { 334 printf("ntfs_strategy: CAN'T EXTEND FILE\n"); 335 bp->b_error = error = EFBIG; 336 } else { 337 towrite = MIN(bp->b_bcount, 338 fp->f_size - ntfs_cntob(bp->b_blkno)); 339 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 340 towrite,(u_int32_t)fp->f_size)); 341 342 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 343 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, 344 bp->b_data, &tmp, NULL); 345 346 if (error) { 347 printf("ntfs_strategy: ntfs_writeattr fail\n"); 348 bp->b_error = error; 349 } 350 } 351 } 352 biodone(bp); 353 return (error); 354 } 355 356 static int 357 ntfs_write(void *v) 358 { 359 struct vop_write_args /* { 360 struct vnode *a_vp; 361 struct uio *a_uio; 362 int a_ioflag; 363 kauth_cred_t a_cred; 364 } */ *ap = v; 365 struct vnode *vp = ap->a_vp; 366 struct fnode *fp = VTOF(vp); 367 struct ntnode *ip = FTONT(fp); 368 struct uio *uio = ap->a_uio; 369 struct ntfsmount *ntmp = ip->i_mp; 370 u_int64_t towrite; 371 size_t written; 372 int error; 373 374 dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n", 375 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 376 (long long)uio->uio_resid)); 377 dprintf(("ntfs_write: filesize: %qu",(long long)fp->f_size)); 378 379 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 380 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 381 return (EFBIG); 382 } 383 384 towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset); 385 386 dprintf((", towrite: %qu\n",(long long)towrite)); 387 388 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 389 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 390 #ifdef NTFS_DEBUG 391 if (error) 392 printf("ntfs_write: ntfs_writeattr failed: %d\n", error); 393 #endif 394 395 return (error); 396 } 397 398 static int 399 ntfs_check_possible(struct vnode *vp, struct ntnode *ip, mode_t mode) 400 { 401 402 /* 403 * Disallow write attempts on read-only file systems; 404 * unless the file is a socket, fifo, or a block or 405 * character device resident on the file system. 406 */ 407 if (mode & VWRITE) { 408 switch ((int)vp->v_type) { 409 case VDIR: 410 case VLNK: 411 case VREG: 412 if (vp->v_mount->mnt_flag & MNT_RDONLY) 413 return (EROFS); 414 break; 415 } 416 } 417 418 return 0; 419 } 420 421 static int 422 ntfs_check_permitted(struct vnode *vp, struct ntnode *ip, mode_t mode, 423 kauth_cred_t cred) 424 { 425 mode_t file_mode; 426 427 file_mode = ip->i_mp->ntm_mode | (S_IXUSR|S_IXGRP|S_IXOTH); 428 429 return genfs_can_access(vp->v_type, file_mode, ip->i_mp->ntm_uid, 430 ip->i_mp->ntm_gid, mode, cred); 431 } 432 433 int 434 ntfs_access(void *v) 435 { 436 struct vop_access_args /* { 437 struct vnode *a_vp; 438 int a_mode; 439 kauth_cred_t a_cred; 440 } */ *ap = v; 441 struct vnode *vp = ap->a_vp; 442 struct ntnode *ip = VTONT(vp); 443 int error; 444 445 dprintf(("ntfs_access: %llu\n", (unsigned long long)ip->i_number)); 446 447 error = ntfs_check_possible(vp, ip, ap->a_mode); 448 if (error) 449 return error; 450 451 error = ntfs_check_permitted(vp, ip, ap->a_mode, ap->a_cred); 452 453 return error; 454 } 455 456 /* 457 * Open called. 458 * 459 * Nothing to do. 460 */ 461 /* ARGSUSED */ 462 static int 463 ntfs_open(void *v) 464 { 465 struct vop_open_args /* { 466 struct vnode *a_vp; 467 int a_mode; 468 kauth_cred_t a_cred; 469 } */ *ap __unused = v; 470 #ifdef NTFS_DEBUG 471 struct vnode *vp = ap->a_vp; 472 struct ntnode *ip = VTONT(vp); 473 474 printf("ntfs_open: %llu\n", (unsigned long long)ip->i_number); 475 #endif 476 477 /* 478 * Files marked append-only must be opened for appending. 479 */ 480 481 return (0); 482 } 483 484 /* 485 * Close called. 486 * 487 * Update the times on the inode. 488 */ 489 /* ARGSUSED */ 490 static int 491 ntfs_close(void *v) 492 { 493 struct vop_close_args /* { 494 struct vnode *a_vp; 495 int a_fflag; 496 kauth_cred_t a_cred; 497 } */ *ap __unused = v; 498 #ifdef NTFS_DEBUG 499 struct vnode *vp = ap->a_vp; 500 struct ntnode *ip = VTONT(vp); 501 502 printf("ntfs_close: %llu\n", (unsigned long long)ip->i_number); 503 #endif 504 505 return (0); 506 } 507 508 int 509 ntfs_readdir(void *v) 510 { 511 struct vop_readdir_args /* { 512 struct vnode *a_vp; 513 struct uio *a_uio; 514 kauth_cred_t a_cred; 515 int *a_ncookies; 516 u_int **cookies; 517 } */ *ap = v; 518 struct vnode *vp = ap->a_vp; 519 struct fnode *fp = VTOF(vp); 520 struct ntnode *ip = FTONT(fp); 521 struct uio *uio = ap->a_uio; 522 struct ntfsmount *ntmp = ip->i_mp; 523 int i, error = 0; 524 u_int32_t faked = 0, num; 525 int ncookies = 0; 526 struct dirent *cde; 527 off_t off; 528 529 dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n", 530 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 531 (long long)uio->uio_resid)); 532 533 off = uio->uio_offset; 534 535 cde = malloc(sizeof(struct dirent), M_TEMP, M_WAITOK); 536 537 /* Simulate . in every dir except ROOT */ 538 if (ip->i_number != NTFS_ROOTINO 539 && uio->uio_offset < sizeof(struct dirent)) { 540 cde->d_fileno = ip->i_number; 541 cde->d_reclen = sizeof(struct dirent); 542 cde->d_type = DT_DIR; 543 cde->d_namlen = 1; 544 strncpy(cde->d_name, ".", 2); 545 error = uiomove((void *)cde, sizeof(struct dirent), uio); 546 if (error) 547 goto out; 548 549 ncookies++; 550 } 551 552 /* Simulate .. in every dir including ROOT */ 553 if (uio->uio_offset < 2 * sizeof(struct dirent)) { 554 cde->d_fileno = NTFS_ROOTINO; /* XXX */ 555 cde->d_reclen = sizeof(struct dirent); 556 cde->d_type = DT_DIR; 557 cde->d_namlen = 2; 558 strncpy(cde->d_name, "..", 3); 559 560 error = uiomove((void *) cde, sizeof(struct dirent), uio); 561 if (error) 562 goto out; 563 564 ncookies++; 565 } 566 567 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 568 num = uio->uio_offset / sizeof(struct dirent) - faked; 569 570 while (uio->uio_resid >= sizeof(struct dirent)) { 571 struct attr_indexentry *iep; 572 char *fname; 573 size_t remains; 574 int sz; 575 576 error = ntfs_ntreaddir(ntmp, fp, num, &iep); 577 if (error) 578 goto out; 579 580 if (NULL == iep) 581 break; 582 583 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); 584 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 585 { 586 if(!ntfs_isnamepermitted(ntmp,iep)) 587 continue; 588 589 remains = sizeof(cde->d_name) - 1; 590 fname = cde->d_name; 591 for(i=0; i<iep->ie_fnamelen; i++) { 592 sz = (*ntmp->ntm_wput)(fname, remains, 593 iep->ie_fname[i]); 594 fname += sz; 595 remains -= sz; 596 } 597 *fname = '\0'; 598 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ", 599 num, cde->d_name, iep->ie_fnametype, 600 iep->ie_flag)); 601 cde->d_namlen = fname - (char *) cde->d_name; 602 cde->d_fileno = iep->ie_number; 603 cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; 604 cde->d_reclen = sizeof(struct dirent); 605 dprintf(("%s\n", (cde->d_type == DT_DIR) ? "dir":"reg")); 606 607 error = uiomove((void *)cde, sizeof(struct dirent), uio); 608 if (error) 609 goto out; 610 611 ncookies++; 612 num++; 613 } 614 } 615 616 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 617 ncookies,(u_int)(uio->uio_offset - off))); 618 dprintf(("ntfs_readdir: off: %qd resid: %qu\n", 619 (long long)uio->uio_offset,(long long)uio->uio_resid)); 620 621 if (!error && ap->a_ncookies != NULL) { 622 struct dirent* dpStart; 623 struct dirent* dp; 624 off_t *cookies; 625 off_t *cookiep; 626 627 dprintf(("ntfs_readdir: %d cookies\n",ncookies)); 628 dpStart = (struct dirent *) 629 ((char *)uio->uio_iov->iov_base - 630 (uio->uio_offset - off)); 631 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 632 for (dp = dpStart, cookiep = cookies, i=0; 633 i < ncookies; 634 dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) { 635 off += dp->d_reclen; 636 *cookiep++ = (u_int) off; 637 } 638 *ap->a_ncookies = ncookies; 639 *ap->a_cookies = cookies; 640 } 641 /* 642 if (ap->a_eofflag) 643 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; 644 */ 645 out: 646 free(cde, M_TEMP); 647 return (error); 648 } 649 650 int 651 ntfs_lookup(void *v) 652 { 653 struct vop_lookup_args /* { 654 struct vnode *a_dvp; 655 struct vnode **a_vpp; 656 struct componentname *a_cnp; 657 } */ *ap = v; 658 struct vnode *dvp = ap->a_dvp; 659 struct ntnode *dip = VTONT(dvp); 660 struct ntfsmount *ntmp = dip->i_mp; 661 struct componentname *cnp = ap->a_cnp; 662 kauth_cred_t cred = cnp->cn_cred; 663 int error; 664 665 dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n", 666 (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen, 667 (unsigned long long)dip->i_number)); 668 669 error = VOP_ACCESS(dvp, VEXEC, cred); 670 if(error) 671 return (error); 672 673 if ((cnp->cn_flags & ISLASTCN) && 674 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 675 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 676 return (EROFS); 677 678 /* 679 * We now have a segment name to search for, and a directory 680 * to search. 681 * 682 * Before tediously performing a linear scan of the directory, 683 * check the name cache to see if the directory/name pair 684 * we are looking for is known already. 685 */ 686 if ((error = cache_lookup(ap->a_dvp, ap->a_vpp, cnp)) >= 0) 687 return (error); 688 689 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 690 dprintf(("ntfs_lookup: faking . directory in %llu\n", 691 (unsigned long long)dip->i_number)); 692 693 vref(dvp); 694 *ap->a_vpp = dvp; 695 error = 0; 696 } else if (cnp->cn_flags & ISDOTDOT) { 697 struct ntvattr *vap; 698 699 dprintf(("ntfs_lookup: faking .. directory in %llu\n", 700 (unsigned long long)dip->i_number)); 701 702 VOP_UNLOCK(dvp); 703 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 704 if (error) { 705 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 706 return (error); 707 } 708 709 dprintf(("ntfs_lookup: parentdir: %d\n", 710 vap->va_a_name->n_pnumber)); 711 error = VFS_VGET(ntmp->ntm_mountp, 712 vap->va_a_name->n_pnumber,ap->a_vpp); 713 ntfs_ntvattrrele(vap); 714 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 715 if (error) { 716 return (error); 717 } 718 } else { 719 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 720 if (error) { 721 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 722 return (error); 723 } 724 725 dprintf(("ntfs_lookup: found ino: %llu\n", 726 (unsigned long long)VTONT(*ap->a_vpp)->i_number)); 727 } 728 729 if (cnp->cn_flags & MAKEENTRY) 730 cache_enter(dvp, *ap->a_vpp, cnp); 731 732 return (error); 733 } 734 735 /* 736 * Flush the blocks of a file to disk. 737 * 738 * This function is worthless for vnodes that represent directories. Maybe we 739 * could just do a sync if they try an fsync on a directory file. 740 */ 741 static int 742 ntfs_fsync(void *v) 743 { 744 struct vop_fsync_args /* { 745 struct vnode *a_vp; 746 kauth_cred_t a_cred; 747 int a_flags; 748 off_t offlo; 749 off_t offhi; 750 } */ *ap = v; 751 struct vnode *vp = ap->a_vp; 752 int wait; 753 754 if (ap->a_flags & FSYNC_CACHE) { 755 return EOPNOTSUPP; 756 } 757 758 wait = (ap->a_flags & FSYNC_WAIT) != 0; 759 vflushbuf(vp, wait); 760 761 return 0; 762 } 763 764 /* 765 * Return POSIX pathconf information applicable to NTFS filesystem 766 */ 767 static int 768 ntfs_pathconf(void *v) 769 { 770 struct vop_pathconf_args /* { 771 struct vnode *a_vp; 772 int a_name; 773 register_t *a_retval; 774 } */ *ap = v; 775 776 switch (ap->a_name) { 777 case _PC_LINK_MAX: 778 *ap->a_retval = 1; 779 return (0); 780 case _PC_NAME_MAX: 781 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 782 return (0); 783 case _PC_PATH_MAX: 784 *ap->a_retval = PATH_MAX; 785 return (0); 786 case _PC_CHOWN_RESTRICTED: 787 *ap->a_retval = 1; 788 return (0); 789 case _PC_NO_TRUNC: 790 *ap->a_retval = 0; 791 return (0); 792 case _PC_SYNC_IO: 793 *ap->a_retval = 1; 794 return (0); 795 case _PC_FILESIZEBITS: 796 *ap->a_retval = 64; 797 return (0); 798 default: 799 return (EINVAL); 800 } 801 /* NOTREACHED */ 802 } 803 804 /* 805 * Global vfs data structures 806 */ 807 vop_t **ntfs_vnodeop_p; 808 809 const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = { 810 { &vop_default_desc, (vop_t *) ntfs_bypass }, 811 { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */ 812 { &vop_create_desc, genfs_eopnotsupp }, /* create */ 813 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 814 { &vop_open_desc, (vop_t *) ntfs_open }, /* open */ 815 { &vop_close_desc,(vop_t *) ntfs_close }, /* close */ 816 { &vop_access_desc, (vop_t *) ntfs_access }, /* access */ 817 { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */ 818 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */ 819 { &vop_read_desc, (vop_t *) ntfs_read }, /* read */ 820 { &vop_write_desc, (vop_t *) ntfs_write }, /* write */ 821 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 822 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ 823 { &vop_poll_desc, genfs_poll }, /* poll */ 824 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 825 { &vop_revoke_desc, genfs_revoke }, /* revoke */ 826 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 827 { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */ 828 { &vop_seek_desc, genfs_seek }, /* seek */ 829 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ 830 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 831 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ 832 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ 833 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ 834 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 835 { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */ 836 { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */ 837 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 838 { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */ 839 { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */ 840 { &vop_lock_desc, genfs_lock }, /* lock */ 841 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 842 { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */ 843 { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */ 844 { &vop_print_desc, (vop_t *) ntfs_print }, /* print */ 845 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 846 { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */ 847 { &vop_advlock_desc, genfs_nullop }, /* advlock */ 848 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 849 { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */ 850 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 851 { NULL, NULL } 852 }; 853 const struct vnodeopv_desc ntfs_vnodeop_opv_desc = 854 { &ntfs_vnodeop_p, ntfs_vnodeop_entries }; 855