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sys/fs/ntfs/ntfs_vnops.c
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1 /* $NetBSD: ntfs_vnops.c,v 1.66 2021/06/29 22:34:07 dholland 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 1.66 2021/06/29 22:34:07 dholland 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 /* 83 * This is a noop, simply returning what one has been given. 84 */ 85 int 86 ntfs_bmap(void *v) 87 { 88 struct vop_bmap_args /* { 89 struct vnode *a_vp; 90 daddr_t a_bn; 91 struct vnode **a_vpp; 92 daddr_t *a_bnp; 93 int *a_runp; 94 int *a_runb; 95 } */ *ap = v; 96 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 97 if (ap->a_vpp != NULL) 98 *ap->a_vpp = ap->a_vp; 99 if (ap->a_bnp != NULL) 100 *ap->a_bnp = ap->a_bn; 101 if (ap->a_runp != NULL) 102 *ap->a_runp = 0; 103 return (0); 104 } 105 106 static int 107 ntfs_read(void *v) 108 { 109 struct vop_read_args /* { 110 struct vnode *a_vp; 111 struct uio *a_uio; 112 int a_ioflag; 113 kauth_cred_t a_cred; 114 } */ *ap = v; 115 struct vnode *vp = ap->a_vp; 116 struct fnode *fp = VTOF(vp); 117 struct ntnode *ip = FTONT(fp); 118 struct uio *uio = ap->a_uio; 119 struct ntfsmount *ntmp = ip->i_mp; 120 u_int64_t toread; 121 int error; 122 123 dprintf(("ntfs_read: ino: %llu, off: %qd resid: %qd\n", 124 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 125 (long long)uio->uio_resid)); 126 127 dprintf(("ntfs_read: filesize: %qu",(long long)fp->f_size)); 128 129 /* don't allow reading after end of file */ 130 if (uio->uio_offset > fp->f_size) 131 toread = 0; 132 else 133 toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset ); 134 135 dprintf((", toread: %qu\n",(long long)toread)); 136 137 if (toread == 0) 138 return (0); 139 140 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 141 fp->f_attrname, uio->uio_offset, toread, NULL, uio); 142 if (error) { 143 printf("ntfs_read: ntfs_readattr failed: %d\n",error); 144 return (error); 145 } 146 147 return (0); 148 } 149 150 static int 151 ntfs_bypass(void *v) 152 { 153 struct vop_generic_args /* { 154 struct vnodeop_desc *a_desc; 155 <other random data follows, presumably> 156 } */ *ap __unused = v; 157 int error = ENOTTY; 158 dprintf(("ntfs_bypass: %s\n", ap->a_desc->vdesc_name)); 159 return (error); 160 } 161 162 163 static int 164 ntfs_getattr(void *v) 165 { 166 struct vop_getattr_args /* { 167 struct vnode *a_vp; 168 struct vattr *a_vap; 169 kauth_cred_t a_cred; 170 } */ *ap = v; 171 struct vnode *vp = ap->a_vp; 172 struct fnode *fp = VTOF(vp); 173 struct ntnode *ip = FTONT(fp); 174 struct vattr *vap = ap->a_vap; 175 176 dprintf(("ntfs_getattr: %llu, flags: %d\n", 177 (unsigned long long)ip->i_number, ip->i_flag)); 178 179 vap->va_fsid = ip->i_dev; 180 vap->va_fileid = ip->i_number; 181 vap->va_mode = ip->i_mp->ntm_mode; 182 vap->va_nlink = ip->i_nlink; 183 vap->va_uid = ip->i_mp->ntm_uid; 184 vap->va_gid = ip->i_mp->ntm_gid; 185 vap->va_rdev = 0; /* XXX UNODEV ? */ 186 vap->va_size = fp->f_size; 187 vap->va_bytes = fp->f_allocated; 188 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 189 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 190 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 191 vap->va_flags = ip->i_flag; 192 vap->va_gen = 0; 193 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 194 vap->va_type = vp->v_type; 195 vap->va_filerev = 0; 196 return (0); 197 } 198 199 200 /* 201 * Last reference to an ntnode. If necessary, write or delete it. 202 */ 203 int 204 ntfs_inactive(void *v) 205 { 206 struct vop_inactive_v2_args /* { 207 struct vnode *a_vp; 208 bool *a_recycle; 209 } */ *ap = v; 210 struct vnode *vp __unused = 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 /* XXX since we don't support any filesystem changes 219 * right now, nothing more needs to be done 220 */ 221 return (0); 222 } 223 224 /* 225 * Reclaim an fnode/ntnode so that it can be used for other purposes. 226 */ 227 int 228 ntfs_reclaim(void *v) 229 { 230 struct vop_reclaim_v2_args /* { 231 struct vnode *a_vp; 232 } */ *ap = v; 233 struct vnode *vp = ap->a_vp; 234 struct fnode *fp = VTOF(vp); 235 struct ntnode *ip = FTONT(fp); 236 const int attrlen = strlen(fp->f_attrname); 237 int error; 238 239 VOP_UNLOCK(vp); 240 241 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %llu\n", vp, 242 (unsigned long long)ip->i_number)); 243 244 if ((error = ntfs_ntget(ip)) != 0) 245 return (error); 246 247 if (ip->i_devvp) { 248 vrele(ip->i_devvp); 249 ip->i_devvp = NULL; 250 } 251 genfs_node_destroy(vp); 252 vp->v_data = NULL; 253 254 /* Destroy fnode. */ 255 if (fp->f_key != &fp->f_smallkey) 256 kmem_free(fp->f_key, NTKEY_SIZE(attrlen)); 257 if (fp->f_dirblbuf) 258 free(fp->f_dirblbuf, M_NTFSDIR); 259 kmem_free(fp, sizeof(*fp)); 260 ntfs_ntrele(ip); 261 262 ntfs_ntput(ip); 263 264 return (0); 265 } 266 267 static int 268 ntfs_print(void *v) 269 { 270 struct vop_print_args /* { 271 struct vnode *a_vp; 272 } */ *ap = v; 273 struct ntnode *ip = VTONT(ap->a_vp); 274 275 printf("tag VT_NTFS, ino %llu, flag %#x, usecount %d, nlink %ld\n", 276 (unsigned long long)ip->i_number, ip->i_flag, ip->i_usecount, 277 ip->i_nlink); 278 printf(" "); 279 printf("\n"); 280 return (0); 281 } 282 283 /* 284 * Calculate the logical to physical mapping if not done already, 285 * then call the device strategy routine. 286 */ 287 int 288 ntfs_strategy(void *v) 289 { 290 struct vop_strategy_args /* { 291 struct vnode *a_vp; 292 struct buf *a_bp; 293 } */ *ap = v; 294 struct buf *bp = ap->a_bp; 295 struct vnode *vp = ap->a_vp; 296 struct fnode *fp = VTOF(vp); 297 struct ntnode *ip = FTONT(fp); 298 struct ntfsmount *ntmp = ip->i_mp; 299 int error; 300 301 dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n", 302 (u_int32_t)bp->b_blkno, 303 (u_int32_t)bp->b_lblkno)); 304 305 dprintf(("strategy: bcount: %u flags: 0x%x\n", 306 (u_int32_t)bp->b_bcount,bp->b_flags)); 307 308 if (bp->b_flags & B_READ) { 309 u_int32_t toread; 310 311 if (ntfs_cntob(bp->b_blkno) >= fp->f_size) { 312 clrbuf(bp); 313 error = 0; 314 } else { 315 toread = MIN(bp->b_bcount, 316 fp->f_size - ntfs_cntob(bp->b_blkno)); 317 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 318 toread,(u_int32_t)fp->f_size)); 319 320 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 321 fp->f_attrname, ntfs_cntob(bp->b_blkno), 322 toread, bp->b_data, NULL); 323 324 if (error) { 325 printf("ntfs_strategy: ntfs_readattr failed\n"); 326 bp->b_error = error; 327 } 328 329 memset((char *)bp->b_data + toread, 0, 330 bp->b_bcount - toread); 331 } 332 } else { 333 size_t tmp; 334 u_int32_t towrite; 335 336 if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) { 337 printf("ntfs_strategy: CAN'T EXTEND FILE\n"); 338 bp->b_error = error = EFBIG; 339 } else { 340 towrite = MIN(bp->b_bcount, 341 fp->f_size - ntfs_cntob(bp->b_blkno)); 342 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 343 towrite,(u_int32_t)fp->f_size)); 344 345 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 346 fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite, 347 bp->b_data, &tmp, NULL); 348 349 if (error) { 350 printf("ntfs_strategy: ntfs_writeattr fail\n"); 351 bp->b_error = error; 352 } 353 } 354 } 355 biodone(bp); 356 return (error); 357 } 358 359 static int 360 ntfs_write(void *v) 361 { 362 struct vop_write_args /* { 363 struct vnode *a_vp; 364 struct uio *a_uio; 365 int a_ioflag; 366 kauth_cred_t a_cred; 367 } */ *ap = v; 368 struct vnode *vp = ap->a_vp; 369 struct fnode *fp = VTOF(vp); 370 struct ntnode *ip = FTONT(fp); 371 struct uio *uio = ap->a_uio; 372 struct ntfsmount *ntmp = ip->i_mp; 373 u_int64_t towrite; 374 size_t written; 375 int error; 376 377 dprintf(("ntfs_write: ino: %llu, off: %qd resid: %qd\n", 378 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 379 (long long)uio->uio_resid)); 380 dprintf(("ntfs_write: filesize: %qu",(long long)fp->f_size)); 381 382 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 383 printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 384 return (EFBIG); 385 } 386 387 towrite = MIN(uio->uio_resid, fp->f_size - uio->uio_offset); 388 389 dprintf((", towrite: %qu\n",(long long)towrite)); 390 391 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 392 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 393 #ifdef NTFS_DEBUG 394 if (error) 395 printf("ntfs_write: ntfs_writeattr failed: %d\n", error); 396 #endif 397 398 return (error); 399 } 400 401 static int 402 ntfs_check_possible(struct vnode *vp, struct ntnode *ip, accmode_t accmode) 403 { 404 405 /* 406 * Disallow write attempts on read-only file systems; 407 * unless the file is a socket, fifo, or a block or 408 * character device resident on the file system. 409 */ 410 if (accmode & VWRITE) { 411 switch ((int)vp->v_type) { 412 case VDIR: 413 case VLNK: 414 case VREG: 415 if (vp->v_mount->mnt_flag & MNT_RDONLY) 416 return (EROFS); 417 break; 418 } 419 } 420 421 return 0; 422 } 423 424 static int 425 ntfs_check_permitted(struct vnode *vp, struct ntnode *ip, accmode_t accmode, 426 kauth_cred_t cred) 427 { 428 mode_t file_mode; 429 430 file_mode = ip->i_mp->ntm_mode | (S_IXUSR|S_IXGRP|S_IXOTH); 431 432 return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(accmode, 433 vp->v_type, file_mode), vp, NULL, genfs_can_access(vp, cred, 434 ip->i_mp->ntm_uid, ip->i_mp->ntm_gid, file_mode, NULL, accmode)); 435 } 436 437 int 438 ntfs_access(void *v) 439 { 440 struct vop_access_args /* { 441 struct vnode *a_vp; 442 accmode_t a_accmode; 443 kauth_cred_t a_cred; 444 } */ *ap = v; 445 struct vnode *vp = ap->a_vp; 446 struct ntnode *ip = VTONT(vp); 447 int error; 448 449 dprintf(("ntfs_access: %llu\n", (unsigned long long)ip->i_number)); 450 451 error = ntfs_check_possible(vp, ip, ap->a_accmode); 452 if (error) 453 return error; 454 455 error = ntfs_check_permitted(vp, ip, ap->a_accmode, ap->a_cred); 456 457 return error; 458 } 459 460 /* 461 * Open called. 462 * 463 * Nothing to do. 464 */ 465 /* ARGSUSED */ 466 static int 467 ntfs_open(void *v) 468 { 469 struct vop_open_args /* { 470 struct vnode *a_vp; 471 int a_mode; 472 kauth_cred_t a_cred; 473 } */ *ap __unused = v; 474 #ifdef NTFS_DEBUG 475 struct vnode *vp = ap->a_vp; 476 struct ntnode *ip = VTONT(vp); 477 478 dprintf(("ntfs_open: %llu\n", (unsigned long long)ip->i_number)); 479 #endif 480 481 /* 482 * Files marked append-only must be opened for appending. 483 */ 484 485 return (0); 486 } 487 488 /* 489 * Close called. 490 * 491 * Update the times on the inode. 492 */ 493 /* ARGSUSED */ 494 static int 495 ntfs_close(void *v) 496 { 497 struct vop_close_args /* { 498 struct vnode *a_vp; 499 int a_fflag; 500 kauth_cred_t a_cred; 501 } */ *ap __unused = v; 502 #ifdef NTFS_DEBUG 503 struct vnode *vp = ap->a_vp; 504 struct ntnode *ip = VTONT(vp); 505 506 dprintf(("ntfs_close: %llu\n", (unsigned long long)ip->i_number)); 507 #endif 508 509 return (0); 510 } 511 512 int 513 ntfs_readdir(void *v) 514 { 515 struct vop_readdir_args /* { 516 struct vnode *a_vp; 517 struct uio *a_uio; 518 kauth_cred_t a_cred; 519 int *a_ncookies; 520 u_int **cookies; 521 } */ *ap = v; 522 struct vnode *vp = ap->a_vp; 523 struct fnode *fp = VTOF(vp); 524 struct ntnode *ip = FTONT(fp); 525 struct uio *uio = ap->a_uio; 526 struct ntfsmount *ntmp = ip->i_mp; 527 int i, error = 0; 528 u_int32_t faked = 0, num; 529 int ncookies = 0; 530 struct dirent *cde; 531 off_t off; 532 533 dprintf(("ntfs_readdir %llu off: %qd resid: %qd\n", 534 (unsigned long long)ip->i_number, (long long)uio->uio_offset, 535 (long long)uio->uio_resid)); 536 537 off = uio->uio_offset; 538 539 cde = malloc(sizeof(struct dirent), M_TEMP, M_WAITOK); 540 541 /* Simulate . in every dir except ROOT */ 542 if (ip->i_number != NTFS_ROOTINO 543 && uio->uio_offset < sizeof(struct dirent)) { 544 cde->d_fileno = ip->i_number; 545 cde->d_reclen = sizeof(struct dirent); 546 cde->d_type = DT_DIR; 547 cde->d_namlen = 1; 548 strncpy(cde->d_name, ".", 2); 549 error = uiomove((void *)cde, sizeof(struct dirent), uio); 550 if (error) 551 goto out; 552 553 ncookies++; 554 } 555 556 /* Simulate .. in every dir including ROOT */ 557 if (uio->uio_offset < 2 * sizeof(struct dirent)) { 558 cde->d_fileno = NTFS_ROOTINO; /* XXX */ 559 cde->d_reclen = sizeof(struct dirent); 560 cde->d_type = DT_DIR; 561 cde->d_namlen = 2; 562 strncpy(cde->d_name, "..", 3); 563 564 error = uiomove((void *) cde, sizeof(struct dirent), uio); 565 if (error) 566 goto out; 567 568 ncookies++; 569 } 570 571 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 572 num = uio->uio_offset / sizeof(struct dirent) - faked; 573 574 while (uio->uio_resid >= sizeof(struct dirent)) { 575 struct attr_indexentry *iep; 576 char *fname; 577 size_t remains; 578 int sz; 579 580 error = ntfs_ntreaddir(ntmp, fp, num, &iep); 581 if (error) 582 goto out; 583 584 if (NULL == iep) 585 break; 586 587 for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent)); 588 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 589 { 590 if(!ntfs_isnamepermitted(ntmp,iep)) 591 continue; 592 593 remains = sizeof(cde->d_name) - 1; 594 fname = cde->d_name; 595 for(i=0; i<iep->ie_fnamelen; i++) { 596 sz = (*ntmp->ntm_wput)(fname, remains, 597 iep->ie_fname[i]); 598 fname += sz; 599 remains -= sz; 600 } 601 *fname = '\0'; 602 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ", 603 num, cde->d_name, iep->ie_fnametype, 604 iep->ie_flag)); 605 cde->d_namlen = fname - (char *) cde->d_name; 606 cde->d_fileno = iep->ie_number; 607 cde->d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG; 608 cde->d_reclen = sizeof(struct dirent); 609 dprintf(("%s\n", (cde->d_type == DT_DIR) ? "dir":"reg")); 610 611 error = uiomove((void *)cde, sizeof(struct dirent), uio); 612 if (error) 613 goto out; 614 615 ncookies++; 616 num++; 617 } 618 } 619 620 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 621 ncookies,(u_int)(uio->uio_offset - off))); 622 dprintf(("ntfs_readdir: off: %qd resid: %qu\n", 623 (long long)uio->uio_offset,(long long)uio->uio_resid)); 624 625 if (!error && ap->a_ncookies != NULL) { 626 struct dirent* dpStart; 627 struct dirent* dp; 628 off_t *cookies; 629 off_t *cookiep; 630 631 dprintf(("ntfs_readdir: %d cookies\n",ncookies)); 632 dpStart = (struct dirent *) 633 ((char *)uio->uio_iov->iov_base - 634 (uio->uio_offset - off)); 635 cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 636 for (dp = dpStart, cookiep = cookies, i=0; 637 i < ncookies; 638 dp = (struct dirent *)((char *) dp + dp->d_reclen), i++) { 639 off += dp->d_reclen; 640 *cookiep++ = (u_int) off; 641 } 642 *ap->a_ncookies = ncookies; 643 *ap->a_cookies = cookies; 644 } 645 /* 646 if (ap->a_eofflag) 647 *ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset; 648 */ 649 out: 650 free(cde, M_TEMP); 651 return (error); 652 } 653 654 int 655 ntfs_lookup(void *v) 656 { 657 struct vop_lookup_v2_args /* { 658 struct vnode *a_dvp; 659 struct vnode **a_vpp; 660 struct componentname *a_cnp; 661 } */ *ap = v; 662 struct vnode *dvp = ap->a_dvp; 663 struct ntnode *dip = VTONT(dvp); 664 struct ntfsmount *ntmp = dip->i_mp; 665 struct componentname *cnp = ap->a_cnp; 666 kauth_cred_t cred = cnp->cn_cred; 667 int error; 668 669 dprintf(("ntfs_lookup: \"%.*s\" (%lld bytes) in %llu\n", 670 (int)cnp->cn_namelen, cnp->cn_nameptr, (long long)cnp->cn_namelen, 671 (unsigned long long)dip->i_number)); 672 673 error = VOP_ACCESS(dvp, VEXEC, cred); 674 if(error) 675 return (error); 676 677 if ((cnp->cn_flags & ISLASTCN) && 678 (dvp->v_mount->mnt_flag & MNT_RDONLY) && 679 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 680 return (EROFS); 681 682 /* 683 * We now have a segment name to search for, and a directory 684 * to search. 685 * 686 * Before tediously performing a linear scan of the directory, 687 * check the name cache to see if the directory/name pair 688 * we are looking for is known already. 689 */ 690 if (cache_lookup(ap->a_dvp, cnp->cn_nameptr, cnp->cn_namelen, 691 cnp->cn_nameiop, cnp->cn_flags, NULL, ap->a_vpp)) { 692 return *ap->a_vpp == NULLVP ? ENOENT : 0; 693 } 694 695 if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 696 dprintf(("ntfs_lookup: faking . directory in %llu\n", 697 (unsigned long long)dip->i_number)); 698 699 vref(dvp); 700 *ap->a_vpp = dvp; 701 error = 0; 702 } else if (cnp->cn_flags & ISDOTDOT) { 703 struct ntvattr *vap; 704 705 dprintf(("ntfs_lookup: faking .. directory in %llu\n", 706 (unsigned long long)dip->i_number)); 707 708 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 709 if (error) { 710 return (error); 711 } 712 713 dprintf(("ntfs_lookup: parentdir: %d\n", 714 vap->va_a_name->n_pnumber)); 715 error = ntfs_vgetex(ntmp->ntm_mountp, 716 vap->va_a_name->n_pnumber, 717 NTFS_A_DATA, "", 0, ap->a_vpp); 718 ntfs_ntvattrrele(vap); 719 if (error) { 720 return (error); 721 } 722 } else { 723 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 724 if (error) { 725 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 726 return (error); 727 } 728 729 dprintf(("ntfs_lookup: found ino: %llu\n", 730 (unsigned long long)VTONT(*ap->a_vpp)->i_number)); 731 } 732 733 cache_enter(dvp, *ap->a_vpp, cnp->cn_nameptr, cnp->cn_namelen, 734 cnp->cn_flags); 735 736 return error; 737 } 738 739 /* 740 * Flush the blocks of a file to disk. 741 * 742 * This function is worthless for vnodes that represent directories. Maybe we 743 * could just do a sync if they try an fsync on a directory file. 744 */ 745 static int 746 ntfs_fsync(void *v) 747 { 748 struct vop_fsync_args /* { 749 struct vnode *a_vp; 750 kauth_cred_t a_cred; 751 int a_flags; 752 off_t offlo; 753 off_t offhi; 754 } */ *ap = v; 755 struct vnode *vp = ap->a_vp; 756 757 if (ap->a_flags & FSYNC_CACHE) { 758 return EOPNOTSUPP; 759 } 760 761 return vflushbuf(vp, ap->a_flags); 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 genfs_pathconf(ap); 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_parsepath_desc, genfs_parsepath }, /* parsepath */ 812 { &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */ 813 { &vop_create_desc, genfs_eopnotsupp }, /* create */ 814 { &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */ 815 { &vop_open_desc, (vop_t *) ntfs_open }, /* open */ 816 { &vop_close_desc,(vop_t *) ntfs_close }, /* close */ 817 { &vop_access_desc, (vop_t *) ntfs_access }, /* access */ 818 { &vop_accessx_desc, (vop_t *) genfs_accessx }, /* accessx */ 819 { &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */ 820 { &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */ 821 { &vop_read_desc, (vop_t *) ntfs_read }, /* read */ 822 { &vop_write_desc, (vop_t *) ntfs_write }, /* write */ 823 { &vop_fallocate_desc, genfs_eopnotsupp }, /* fallocate */ 824 { &vop_fdiscard_desc, genfs_eopnotsupp }, /* fdiscard */ 825 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 826 { &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */ 827 { &vop_poll_desc, genfs_poll }, /* poll */ 828 { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */ 829 { &vop_revoke_desc, genfs_revoke }, /* revoke */ 830 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 831 { &vop_fsync_desc, (vop_t *) ntfs_fsync }, /* fsync */ 832 { &vop_seek_desc, genfs_seek }, /* seek */ 833 { &vop_remove_desc, genfs_eopnotsupp }, /* remove */ 834 { &vop_link_desc, genfs_eopnotsupp }, /* link */ 835 { &vop_rename_desc, genfs_eopnotsupp }, /* rename */ 836 { &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */ 837 { &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */ 838 { &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */ 839 { &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */ 840 { &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */ 841 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 842 { &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */ 843 { &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */ 844 { &vop_lock_desc, genfs_lock }, /* lock */ 845 { &vop_unlock_desc, genfs_unlock }, /* unlock */ 846 { &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */ 847 { &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */ 848 { &vop_print_desc, (vop_t *) ntfs_print }, /* print */ 849 { &vop_islocked_desc, genfs_islocked }, /* islocked */ 850 { &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */ 851 { &vop_advlock_desc, genfs_nullop }, /* advlock */ 852 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 853 { &vop_getpages_desc, genfs_compat_getpages }, /* getpages */ 854 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 855 { NULL, NULL } 856 }; 857 const struct vnodeopv_desc ntfs_vnodeop_opv_desc = 858 { &ntfs_vnodeop_p, ntfs_vnodeop_entries };
Cache object: 5f86c1d41a570ac98b4beafd4c6cd001
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