1 /* $NetBSD: ntfs_vnops.c,v 1.60 2016/08/20 12:37:07 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 1.60 2016/08/20 12:37:07 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 <fs/ntfs/ntfs_vfsops.h> 60 #include <miscfs/specfs/specdev.h> 61 #include <miscfs/genfs/genfs.h> 62 63 #include <sys/unistd.h> /* for pathconf(2) constants */ 64 65 static int ntfs_bypass(void *); 66 static int ntfs_read(void *); 67 static int ntfs_write(void *); 68 static int ntfs_getattr(void *); 69 static int ntfs_inactive(void *); 70 static int ntfs_print(void *); 71 static int ntfs_reclaim(void *); 72 static int ntfs_strategy(void *); 73 static int ntfs_access(void *); 74 static int ntfs_open(void *); 75 static int ntfs_close(void *); 76 static int ntfs_readdir(void *); 77 static int ntfs_lookup(void *); 78 static int ntfs_bmap(void *); 79 static int ntfs_fsync(void *); 80 static int ntfs_pathconf(void *); 81 82 extern int prtactive; 83 84 /* 85 * This is a noop, simply returning what one has been given. 86 */ 87 int 88 ntfs_bmap(void *v) 89 { 90 struct vop_bmap_args /* { 91 struct vnode *a_vp; 92 daddr_t a_bn; 93 struct vnode **a_vpp; 94 daddr_t *a_bnp; 95 int *a_runp; 96 int *a_runb; 97 } */ *ap = v; 98 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 99 if (ap->a_vpp != NULL) 100 *ap->a_vpp = ap->a_vp; 101 if (ap->a_bnp != NULL) 102 *ap->a_bnp = ap->a_bn; 103 if (ap->a_runp != NULL) 104 *ap->a_runp = 0; 105 return (0); 106 } 107 108 static int 109 ntfs_read(void *v) 110 { 111 struct vop_read_args /* { 112 struct vnode *a_vp; 113 struct uio *a_uio; 114 int a_ioflag; 115 kauth_cred_t a_cred; 116 } */ *ap = v; 117 struct vnode *vp = ap->a_vp; 118 struct fnode *fp = VTOF(vp); 119 struct ntnode *ip = FTONT(fp); 120 struct uio *uio = ap->a_uio; 121 struct ntfsmount *ntmp = ip->i_mp; 122 u_int64_t toread; 123 int error; 124 125 dprintf(("ntfs_read: ino: %llu, off: %qd resid: %qd\n", 126 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 127 (long long)uio->uio_resid)); 128 129 dprintf(("ntfs_read: filesize: %qu",(long long)fp->f_size)); 130 131 /* don't allow reading after end of file */ 132 if (uio->uio_offset > fp->f_size) 133 toread = 0; 134 else 135 toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset ); 136 137 dprintf((", toread: %qu\n",(long long)toread)); 138 139 if (toread == 0) 140 return (0); 141 142 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 143 fp->f_attrname, uio->uio_offset, toread, NULL, uio); 144 if (error) { 145 printf("ntfs_read: ntfs_readattr failed: %d\n",error); 146 return (error); 147 } 148 149 return (0); 150 } 151 152 static int 153 ntfs_bypass(void *v) 154 { 155 struct vop_generic_args /* { 156 struct vnodeop_desc *a_desc; 157 <other random data follows, presumably> 158 } */ *ap __unused = v; 159 int error = ENOTTY; 160 dprintf(("ntfs_bypass: %s\n", ap->a_desc->vdesc_name)); 161 return (error); 162 } 163 164 165 static int 166 ntfs_getattr(void *v) 167 { 168 struct vop_getattr_args /* { 169 struct vnode *a_vp; 170 struct vattr *a_vap; 171 kauth_cred_t a_cred; 172 } */ *ap = v; 173 struct vnode *vp = ap->a_vp; 174 struct fnode *fp = VTOF(vp); 175 struct ntnode *ip = FTONT(fp); 176 struct vattr *vap = ap->a_vap; 177 178 dprintf(("ntfs_getattr: %llu, flags: %d\n", 179 (unsigned long long)ip->i_number, ip->i_flag)); 180 181 vap->va_fsid = ip->i_dev; 182 vap->va_fileid = ip->i_number; 183 vap->va_mode = ip->i_mp->ntm_mode; 184 vap->va_nlink = ip->i_nlink; 185 vap->va_uid = ip->i_mp->ntm_uid; 186 vap->va_gid = ip->i_mp->ntm_gid; 187 vap->va_rdev = 0; /* XXX UNODEV ? */ 188 vap->va_size = fp->f_size; 189 vap->va_bytes = fp->f_allocated; 190 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 191 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 192 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 193 vap->va_flags = ip->i_flag; 194 vap->va_gen = 0; 195 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 196 vap->va_type = vp->v_type; 197 vap->va_filerev = 0; 198 return (0); 199 } 200 201 202 /* 203 * Last reference to an ntnode. If necessary, write or delete it. 204 */ 205 int 206 ntfs_inactive(void *v) 207 { 208 struct vop_inactive_args /* { 209 struct vnode *a_vp; 210 } */ *ap = v; 211 struct vnode *vp = ap->a_vp; 212 #ifdef NTFS_DEBUG 213 struct ntnode *ip = VTONT(vp); 214 #endif 215 216 dprintf(("ntfs_inactive: vnode: %p, ntnode: %llu\n", vp, 217 (unsigned long long)ip->i_number)); 218 219 VOP_UNLOCK(vp); 220 221 /* XXX since we don't support any filesystem changes 222 * right now, nothing more needs to be done 223 */ 224 return (0); 225 } 226 227 /* 228 * Reclaim an fnode/ntnode so that it can be used for other purposes. 229 */ 230 int 231 ntfs_reclaim(void *v) 232 { 233 struct vop_reclaim_args /* { 234 struct vnode *a_vp; 235 } */ *ap = v; 236 struct vnode *vp = ap->a_vp; 237 struct fnode *fp = VTOF(vp); 238 struct ntnode *ip = FTONT(fp); 239 const int attrlen = strlen(fp->f_attrname); 240 int error; 241 242 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %llu\n", vp, 243 (unsigned long long)ip->i_number)); 244 245 if (prtactive && vp->v_usecount > 1) 246 vprint("ntfs_reclaim: pushing active", vp); 247 248 if ((error = ntfs_ntget(ip)) != 0) 249 return (error); 250 251 if (ip->i_devvp) { 252 vrele(ip->i_devvp); 253 ip->i_devvp = NULL; 254 } 255 genfs_node_destroy(vp); 256 vp->v_data = NULL; 257 258 /* Destroy fnode. */ 259 if (fp->f_key != &fp->f_smallkey) 260 kmem_free(fp->f_key, NTKEY_SIZE(attrlen)); 261 if (fp->f_dirblbuf) 262 free(fp->f_dirblbuf, M_NTFSDIR); 263 kmem_free(fp, sizeof(*fp)); 264 ntfs_ntrele(ip); 265 266 ntfs_ntput(ip); 267 268 return (0); 269 } 270 271 static int 272 ntfs_print(void *v) 273 { 274 struct vop_print_args /* { 275 struct vnode *a_vp; 276 } */ *ap = v; 277 struct ntnode *ip = VTONT(ap->a_vp); 278 279 printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n", 280 (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount, 281 ip->i_nlink); 282 printf(" "); 283 printf("\n"); 284 return (0); 285 } 286 287 /* 288 * Calculate the logical to physical mapping if not done already, 289 * then call the device strategy routine. 290 */ 291 int 292 ntfs_strategy(void *v) 293 { 294 struct vop_strategy_args /* { 295 struct vnode *a_vp; 296 struct buf *a_bp; 297 } */ *ap = v; 298 struct buf *bp = ap->a_bp; 299 struct vnode *vp = ap->a_vp; 300 struct fnode *fp = VTOF(vp); 301 struct ntnode *ip = FTONT(fp); 302 struct ntfsmount *ntmp = ip->i_mp; 303 int error; 304 305 dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n", 306 (u_int32_t)bp->b_blkno, 307 (u_int32_t)bp->b_lblkno)); 308 309 dprintf(("strategy: bcount: %u flags: 0x%x\n", 310 (u_int32_t)bp->b_bcount,bp->b_flags)); 311 312 if (bp->b_flags & B_READ) { 313 u_int32_t toread; 314 315 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { 316 clrbuf(bp); 317 error = 0; 318 } else { 319 toread = MIN(bp->b_bcount, 320 fp->f_size - ntfs_cntob(bp->b_blkno)); 321 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 322 toread,(u_int32_t)fp->f_size)); 323 324 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 325 fp->f_attrname, ntfs_cntob(bp->b_blkno), 326 toread, bp->b_data, NULL); 327 328 if (error) { 329 printf("ntfs_strategy: ntfs_readattr failed\n"); 330 bp->b_error = error; 331 } 332 333 memset((char *)bp->b_data + toread, 0, 334 bp->b_bcount - toread); 335 } 336 } else { 337 size_t tmp; 338 u_int32_t towrite; 339 340 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { 341 printf("ntfs_strategy: CAN'T EXTEND FILE\n"); 342 bp->b_error = error = EFBIG; 343 } else { 344 towrite = MIN(bp->b_bcount, 345 fp->f_size - ntfs_cntob(bp->b_blkno)); 346 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 347 towrite,(u_int32_t)fp->f_size)); 348 349 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 350 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, 351 bp->b_data, &tmp, NULL); 352 353 if (error) { 354 printf("ntfs_strategy: ntfs_writeattr fail\n"); 355 bp->b_error = error; 356 } 357 } 358 } 359 biodone(bp); 360 return (error); 361 } 362 363 static int 364 ntfs_write(void *v) 365 { 366 struct vop_write_args /* { 367 struct vnode *a_vp; 368 struct uio *a_uio; 369 int a_ioflag; 370 kauth_cred_t a_cred; 371 } */ *ap = v; 372 struct vnode *vp = ap->a_vp; 373 struct fnode *fp = VTOF(vp); 374 struct ntnode *ip = FTONT(fp); 375 struct uio *uio = ap->a_uio; 376 struct ntfsmount *ntmp = ip->i_mp; 377 u_int64_t towrite; 378 size_t written; 379 int error; 380 381 dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n", 382 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 383 (long long)uio->uio_resid)); 384 dprintf(("ntfs_write: filesize: %qu",(long long)fp->f_size)); 385 386 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 387 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 388 return (EFBIG); 389 } 390 391 towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset); 392 393 dprintf((", towrite: %qu\n",(long long)towrite)); 394 395 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 396 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 397 #ifdef NTFS_DEBUG 398 if (error) 399 printf("ntfs_write: ntfs_writeattr failed: %d\n", error); 400 #endif 401 402 return (error); 403 } 404 405 static int 406 ntfs_check_possible(struct vnode *vp, struct ntnode *ip, mode_t mode) 407 { 408 409 /* 410 * Disallow write attempts on read-only file systems; 411 * unless the file is a socket, fifo, or a block or 412 * character device resident on the file system. 413 */ 414 if (mode & VWRITE) { 415 switch ((int)vp->v_type) { 416 case VDIR: 417 case VLNK: 418 case VREG: 419 if (vp->v_mount->mnt_flag & MNT_RDONLY) 420 return (EROFS); 421 break; 422 } 423 } 424 425 return 0; 426 } 427 428 static int 429 ntfs_check_permitted(struct vnode *vp, struct ntnode *ip, mode_t mode, 430 kauth_cred_t cred) 431 { 432 mode_t file_mode; 433 434 file_mode = ip->i_mp->ntm_mode | (S_IXUSR|S_IXGRP|S_IXOTH); 435 436 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, vp->v_type, 437 file_mode), vp, NULL, genfs_can_access(vp->v_type, file_mode, 438 ip->i_mp->ntm_uid, ip->i_mp->ntm_gid, mode, cred)); 439 } 440 441 int 442 ntfs_access(void *v) 443 { 444 struct vop_access_args /* { 445 struct vnode *a_vp; 446 int a_mode; 447 kauth_cred_t a_cred; 448 } */ *ap = v; 449 struct vnode *vp = ap->a_vp; 450 struct ntnode *ip = VTONT(vp); 451 int error; 452 453 dprintf(("ntfs_access: %llu\n", (unsigned long long)ip->i_number)); 454 455 error = ntfs_check_possible(vp, ip, ap->a_mode); 456 if (error) 457 return error; 458 459 error = ntfs_check_permitted(vp, ip, ap->a_mode, ap->a_cred); 460 461 return error; 462 } 463 464 /* 465 * Open called. 466 * 467 * Nothing to do. 468 */ 469 /* ARGSUSED */ 470 static int 471 ntfs_open(void *v) 472 { 473 struct vop_open_args /* { 474 struct vnode *a_vp; 475 int a_mode; 476 kauth_cred_t a_cred; 477 } */ *ap __unused = v; 478 #ifdef NTFS_DEBUG 479 struct vnode *vp = ap->a_vp; 480 struct ntnode *ip = VTONT(vp); 481 482 dprintf(("ntfs_open: %llu\n", (unsigned long long)ip->i_number)); 483 #endif 484 485 /* 486 * Files marked append-only must be opened for appending. 487 */ 488 489 return (0); 490 } 491 492 /* 493 * Close called. 494 * 495 * Update the times on the inode. 496 */ 497 /* ARGSUSED */ 498 static int 499 ntfs_close(void *v) 500 { 501 struct vop_close_args /* { 502 struct vnode *a_vp; 503 int a_fflag; 504 kauth_cred_t a_cred; 505 } */ *ap __unused = v; 506 #ifdef NTFS_DEBUG 507 struct vnode *vp = ap->a_vp; 508 struct ntnode *ip = VTONT(vp); 509 510 dprintf(("ntfs_close: %llu\n", (unsigned long long)ip->i_number)); 511 #endif 512 513 return (0); 514 } 515 516 int 517 ntfs_readdir(void *v) 518 { 519 struct vop_readdir_args /* { 520 struct vnode *a_vp; 521 struct uio *a_uio; 522 kauth_cred_t a_cred; 523 int *a_ncookies; 524 u_int **cookies; 525 } */ *ap = v; 526 struct vnode *vp = ap->a_vp; 527 struct fnode *fp = VTOF(vp); 528 struct ntnode *ip = FTONT(fp); 529 struct uio *uio = ap->a_uio; 530 struct ntfsmount *ntmp = ip->i_mp; 531 int i, error = 0; 532 u_int32_t faked = 0, num; 533 int ncookies = 0; 534 struct dirent *cde; 535 off_t off; 536 537 dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n", 538 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 539 (long long)uio->uio_resid)); 540 541 off = uio->uio_offset; 542 543 cde = malloc(sizeof(struct dirent), M_TEMP, M_WAITOK); 544 545 /* Simulate . in every dir except ROOT */ 546 if (ip->i_number != NTFS_ROOTINO 547 && uio->uio_offset < sizeof(struct dirent)) { 548 cde->d_fileno = ip->i_number; 549 cde->d_reclen = sizeof(struct dirent); 550 cde->d_type = DT_DIR; 551 cde->d_namlen = 1; 552 strncpy(cde->d_name, ".", 2); 553 error = uiomove((void *)cde, sizeof(struct dirent), uio); 554 if (error) 555 goto out; 556 557 ncookies++; 558 } 559 560 /* Simulate .. in every dir including ROOT */ 561 if (uio->uio_offset < 2 * sizeof(struct dirent)) { 562 cde->d_fileno = NTFS_ROOTINO; /* XXX */ 563 cde->d_reclen = sizeof(struct dirent); 564 cde->d_type = DT_DIR; 565 cde->d_namlen = 2; 566 strncpy(cde->d_name, "..", 3); 567 568 error = uiomove((void *) cde, sizeof(struct dirent), uio); 569 if (error) 570 goto out; 571 572 ncookies++; 573 } 574 575 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 576 num = uio->uio_offset / sizeof(struct dirent) - faked; 577 578 while (uio->uio_resid >= sizeof(struct dirent)) { 579 struct attr_indexentry *iep; 580 char *fname; 581 size_t remains; 582 int sz; 583 584 error = ntfs_ntreaddir(ntmp, fp, num, &iep); 585 if (error) 586 goto out; 587 588 if (NULL == iep) 589 break; 590 591 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); 592 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 593 { 594 if(!ntfs_isnamepermitted(ntmp,iep)) 595 continue; 596 597 remains = sizeof(cde->d_name) - 1; 598 fname = cde->d_name; 599 for(i=0; i<iep->ie_fnamelen; i++) { 600 sz = (*ntmp->ntm_wput)(fname, remains, 601 iep->ie_fname[i]); 602 fname += sz; 603 remains -= sz; 604 } 605 *fname = '\0'; 606 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ", 607 num, cde->d_name, iep->ie_fnametype, 608 iep->ie_flag)); 609 cde->d_namlen = fname - (char *) cde->d_name; 610 cde->d_fileno = iep->ie_number; 611 cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; 612 cde->d_reclen = sizeof(struct dirent); 613 dprintf(("%s\n", (cde->d_type == DT_DIR) ? "dir":"reg")); 614 615 error = uiomove((void *)cde, sizeof(struct dirent), uio); 616 if (error) 617 goto out; 618 619 ncookies++; 620 num++; 621 } 622 } 623 624 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 625 ncookies,(u_int)(uio->uio_offset - off))); 626 dprintf(("ntfs_readdir: off: %qd resid: %qu\n", 627 (long long)uio->uio_offset,(long long)uio->uio_resid)); 628 629 if (!error && ap->a_ncookies != NULL) { 630 struct dirent* dpStart; 631 struct dirent* dp; 632 off_t *cookies; 633 off_t *cookiep; 634 635 dprintf(("ntfs_readdir: %d cookies\n",ncookies)); 636 dpStart = (struct dirent *) 637 ((char *)uio->uio_iov->iov_base - 638 (uio->uio_offset - off)); 639 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 640 for (dp = dpStart, cookiep = cookies, i=0; 641 i < ncookies; 642 dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) { 643 off += dp->d_reclen; 644 *cookiep++ = (u_int) off; 645 } 646 *ap->a_ncookies = ncookies; 647 *ap->a_cookies = cookies; 648 } 649 /* 650 if (ap->a_eofflag) 651 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; 652 */ 653 out: 654 free(cde, M_TEMP); 655 return (error); 656 } 657 658 int 659 ntfs_lookup(void *v) 660 { 661 struct vop_lookup_v2_args /* { 662 struct vnode *a_dvp; 663 struct vnode **a_vpp; 664 struct componentname *a_cnp; 665 } */ *ap = v; 666 struct vnode *dvp = ap->a_dvp; 667 struct ntnode *dip = VTONT(dvp); 668 struct ntfsmount *ntmp = dip->i_mp; 669 struct componentname *cnp = ap->a_cnp; 670 kauth_cred_t cred = cnp->cn_cred; 671 int error; 672 673 dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n", 674 (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen, 675 (unsigned long long)dip->i_number)); 676 677 error = VOP_ACCESS(dvp, VEXEC, cred); 678 if(error) 679 return (error); 680 681 if ((cnp->cn_flags & ISLASTCN) && 682 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 683 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 684 return (EROFS); 685 686 /* 687 * We now have a segment name to search for, and a directory 688 * to search. 689 * 690 * Before tediously performing a linear scan of the directory, 691 * check the name cache to see if the directory/name pair 692 * we are looking for is known already. 693 */ 694 if (cache_lookup(ap->a_dvp, cnp->cn_nameptr, cnp->cn_namelen, 695 cnp->cn_nameiop, cnp->cn_flags, NULL, ap->a_vpp)) { 696 return *ap->a_vpp == NULLVP ? ENOENT : 0; 697 } 698 699 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 700 dprintf(("ntfs_lookup: faking . directory in %llu\n", 701 (unsigned long long)dip->i_number)); 702 703 vref(dvp); 704 *ap->a_vpp = dvp; 705 error = 0; 706 } else if (cnp->cn_flags & ISDOTDOT) { 707 struct ntvattr *vap; 708 709 dprintf(("ntfs_lookup: faking .. directory in %llu\n", 710 (unsigned long long)dip->i_number)); 711 712 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 713 if (error) { 714 return (error); 715 } 716 717 dprintf(("ntfs_lookup: parentdir: %d\n", 718 vap->va_a_name->n_pnumber)); 719 error = ntfs_vgetex(ntmp->ntm_mountp, 720 vap->va_a_name->n_pnumber, 721 NTFS_A_DATA, "", 0, ap->a_vpp); 722 ntfs_ntvattrrele(vap); 723 if (error) { 724 return (error); 725 } 726 } else { 727 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 728 if (error) { 729 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 730 return (error); 731 } 732 733 dprintf(("ntfs_lookup: found ino: %llu\n", 734 (unsigned long long)VTONT(*ap->a_vpp)->i_number)); 735 } 736 737 cache_enter(dvp, *ap->a_vpp, cnp->cn_nameptr, cnp->cn_namelen, 738 cnp->cn_flags); 739 740 return error; 741 } 742 743 /* 744 * Flush the blocks of a file to disk. 745 * 746 * This function is worthless for vnodes that represent directories. Maybe we 747 * could just do a sync if they try an fsync on a directory file. 748 */ 749 static int 750 ntfs_fsync(void *v) 751 { 752 struct vop_fsync_args /* { 753 struct vnode *a_vp; 754 kauth_cred_t a_cred; 755 int a_flags; 756 off_t offlo; 757 off_t offhi; 758 } */ *ap = v; 759 struct vnode *vp = ap->a_vp; 760 761 if (ap->a_flags & FSYNC_CACHE) { 762 return EOPNOTSUPP; 763 } 764 765 return vflushbuf(vp, ap->a_flags); 766 } 767 768 /* 769 * Return POSIX pathconf information applicable to NTFS filesystem 770 */ 771 static int 772 ntfs_pathconf(void *v) 773 { 774 struct vop_pathconf_args /* { 775 struct vnode *a_vp; 776 int a_name; 777 register_t *a_retval; 778 } */ *ap = v; 779 780 switch (ap->a_name) { 781 case _PC_LINK_MAX: 782 *ap->a_retval = 1; 783 return (0); 784 case _PC_NAME_MAX: 785 *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_namemax; 786 return (0); 787 case _PC_PATH_MAX: 788 *ap->a_retval = PATH_MAX; 789 return (0); 790 case _PC_CHOWN_RESTRICTED: 791 *ap->a_retval = 1; 792 return (0); 793 case _PC_NO_TRUNC: 794 *ap->a_retval = 0; 795 return (0); 796 case _PC_SYNC_IO: 797 *ap->a_retval = 1; 798 return (0); 799 case _PC_FILESIZEBITS: 800 *ap->a_retval = 64; 801 return (0); 802 default: 803 return (EINVAL); 804 } 805 /* NOTREACHED */ 806 } 807 808 /* 809 * Global vfs data structures 810 */ 811 vop_t **ntfs_vnodeop_p; 812 813 const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = { 814 { &vop_default_desc, (vop_t *) ntfs_bypass }, 815 { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */ 816 { &vop_create_desc, genfs_eopnotsupp }, /* create */ 817 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 818 { &vop_open_desc, (vop_t *) ntfs_open }, /* open */ 819 { &vop_close_desc,(vop_t *) ntfs_close }, /* close */ 820 { &vop_access_desc, (vop_t *) ntfs_access }, /* access */ 821 { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */ 822 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */ 823 { &vop_read_desc, (vop_t *) ntfs_read }, /* read */ 824 { &vop_write_desc, (vop_t *) ntfs_write }, /* write */ 825 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 826 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 827 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 828 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ 829 { &vop_poll_desc, genfs_poll }, /* poll */ 830 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 831 { &vop_revoke_desc, genfs_revoke }, /* revoke */ 832 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 833 { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */ 834 { &vop_seek_desc, genfs_seek }, /* seek */ 835 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ 836 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 837 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ 838 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ 839 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ 840 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 841 { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */ 842 { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */ 843 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 844 { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */ 845 { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */ 846 { &vop_lock_desc, genfs_lock }, /* lock */ 847 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 848 { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */ 849 { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */ 850 { &vop_print_desc, (vop_t *) ntfs_print }, /* print */ 851 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 852 { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */ 853 { &vop_advlock_desc, genfs_nullop }, /* advlock */ 854 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 855 { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */ 856 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 857 { NULL, NULL } 858 }; 859 const struct vnodeopv_desc ntfs_vnodeop_opv_desc = 860 { &ntfs_vnodeop_p, ntfs_vnodeop_entries }; 861