1 /* $NetBSD: ntfs_vnops.c,v 1.23 1999/10/31 19:45:27 jdolecek 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * $FreeBSD: src/sys/ntfs/ntfs_vnops.c,v 1.9.2.4 2002/08/06 19:35:18 semenu Exp $ 39 * 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/time.h> 46 #include <sys/types.h> 47 #include <sys/stat.h> 48 #include <sys/vnode.h> 49 #include <sys/mount.h> 50 #include <sys/proc.h> 51 #include <sys/namei.h> 52 #include <sys/malloc.h> 53 #include <sys/buf.h> 54 #include <sys/dirent.h> 55 #include <machine/limits.h> 56 57 #include <vm/vm.h> 58 #include <vm/vm_param.h> 59 #if defined(__NetBSD__) 60 #include <vm/vm_prot.h> 61 #endif 62 #include <vm/vm_page.h> 63 #include <vm/vm_object.h> 64 #include <vm/vm_pager.h> 65 #if defined(__DragonFly__) 66 #include <vm/vnode_pager.h> 67 #endif 68 #include <vm/vm_extern.h> 69 70 #include <sys/sysctl.h> 71 72 #include <sys/buf2.h> 73 74 /*#define NTFS_DEBUG 1*/ 75 #include "ntfs.h" 76 #include "ntfs_inode.h" 77 #include "ntfs_subr.h" 78 #if defined(__NetBSD__) 79 #include <miscfs/specfs/specdev.h> 80 #include <miscfs/genfs/genfs.h> 81 #endif 82 83 #include <sys/unistd.h> /* for pathconf(2) constants */ 84 85 static int ntfs_read (struct vop_read_args *); 86 static int ntfs_write (struct vop_write_args *ap); 87 static int ntfs_getattr (struct vop_getattr_args *ap); 88 static int ntfs_inactive (struct vop_inactive_args *ap); 89 static int ntfs_print (struct vop_print_args *ap); 90 static int ntfs_reclaim (struct vop_reclaim_args *ap); 91 static int ntfs_strategy (struct vop_strategy_args *ap); 92 static int ntfs_access (struct vop_access_args *ap); 93 static int ntfs_open (struct vop_open_args *ap); 94 static int ntfs_close (struct vop_close_args *ap); 95 static int ntfs_readdir (struct vop_readdir_args *ap); 96 static int ntfs_lookup (struct vop_old_lookup_args *ap); 97 static int ntfs_bmap (struct vop_bmap_args *ap); 98 #if defined(__DragonFly__) 99 static int ntfs_fsync (struct vop_fsync_args *ap); 100 #else 101 static int ntfs_bypass (struct vop_generic_args *); 102 #endif 103 static int ntfs_pathconf (struct vop_pathconf_args *); 104 105 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */ 106 107 /* 108 * This is a noop, simply returning what one has been given. 109 * 110 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset, 111 * daddr_t *a_doffsetp, int *a_runp, int *a_runb) 112 */ 113 int 114 ntfs_bmap(struct vop_bmap_args *ap) 115 { 116 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 117 if (ap->a_doffsetp != NULL) 118 *ap->a_doffsetp = ap->a_loffset; 119 if (ap->a_runp != NULL) 120 *ap->a_runp = 0; 121 #if !defined(__NetBSD__) 122 if (ap->a_runb != NULL) 123 *ap->a_runb = 0; 124 #endif 125 return (0); 126 } 127 128 /* 129 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 130 * struct ucred *a_cred) 131 */ 132 static int 133 ntfs_read(struct vop_read_args *ap) 134 { 135 struct vnode *vp = ap->a_vp; 136 struct fnode *fp = VTOF(vp); 137 struct ntnode *ip = FTONT(fp); 138 struct uio *uio = ap->a_uio; 139 struct ntfsmount *ntmp = ip->i_mp; 140 struct buf *bp; 141 daddr_t cn; 142 int resid, off, toread; 143 int error; 144 145 dprintf(("ntfs_read: ino: %d, off: %d resid: %ld, segflg: %d\n", 146 ip->i_number, (u_int32_t)uio->uio_offset, 147 uio->uio_resid, uio->uio_segflg)); 148 149 dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size)); 150 151 /* don't allow reading after end of file */ 152 if (uio->uio_offset > fp->f_size) 153 return (0); 154 155 resid = (int)szmin(uio->uio_resid, fp->f_size - uio->uio_offset); 156 157 dprintf((", resid: %d\n", resid)); 158 159 error = 0; 160 while (resid) { 161 cn = ntfs_btocn(uio->uio_offset); 162 off = ntfs_btocnoff(uio->uio_offset); 163 164 toread = min(off + resid, ntfs_cntob(1)); 165 166 error = bread(vp, ntfs_cntodoff(cn), ntfs_cntob(1), &bp); 167 if (error) { 168 brelse(bp); 169 break; 170 } 171 172 error = uiomove(bp->b_data + off, toread - off, uio); 173 if(error) { 174 brelse(bp); 175 break; 176 } 177 brelse(bp); 178 179 resid -= toread - off; 180 } 181 182 return (error); 183 } 184 185 #if !defined(__DragonFly__) 186 187 /* 188 * ntfs_bypass() 189 */ 190 static int 191 ntfs_bypass(struct vop_generic_args *ap) 192 { 193 int error = ENOTTY; 194 dprintf(("ntfs_bypass: %s\n", ap->a_desc->sd_name)); 195 return (error); 196 } 197 198 #endif 199 200 /* 201 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap) 202 */ 203 static int 204 ntfs_getattr(struct vop_getattr_args *ap) 205 { 206 struct vnode *vp = ap->a_vp; 207 struct fnode *fp = VTOF(vp); 208 struct ntnode *ip = FTONT(fp); 209 struct vattr *vap = ap->a_vap; 210 211 dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag)); 212 213 #if defined(__DragonFly__) 214 vap->va_fsid = dev2udev(ip->i_dev); 215 #else /* NetBSD */ 216 vap->va_fsid = ip->i_dev; 217 #endif 218 vap->va_fileid = ip->i_number; 219 vap->va_mode = ip->i_mp->ntm_mode; 220 vap->va_nlink = ip->i_nlink; 221 vap->va_uid = ip->i_mp->ntm_uid; 222 vap->va_gid = ip->i_mp->ntm_gid; 223 vap->va_rmajor = VNOVAL; 224 vap->va_rminor = VNOVAL; 225 vap->va_size = fp->f_size; 226 vap->va_bytes = fp->f_allocated; 227 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 228 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 229 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 230 vap->va_flags = ip->i_flag; 231 vap->va_gen = 0; 232 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 233 vap->va_type = vp->v_type; 234 vap->va_filerev = 0; 235 return (0); 236 } 237 238 239 /* 240 * Last reference to an ntnode. If necessary, write or delete it. 241 * 242 * ntfs_inactive(struct vnode *a_vp) 243 */ 244 int 245 ntfs_inactive(struct vop_inactive_args *ap) 246 { 247 struct vnode *vp = ap->a_vp; 248 #ifdef NTFS_DEBUG 249 struct ntnode *ip = VTONT(vp); 250 #endif 251 252 dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number)); 253 254 if (ntfs_prtactive && vp->v_sysref.refcnt > 1) 255 vprint("ntfs_inactive: pushing active", vp); 256 257 /* 258 * XXX since we don't support any filesystem changes 259 * right now, nothing more needs to be done 260 */ 261 return (0); 262 } 263 264 /* 265 * Reclaim an fnode/ntnode so that it can be used for other purposes. 266 * 267 * ntfs_reclaim(struct vnode *a_vp) 268 */ 269 int 270 ntfs_reclaim(struct vop_reclaim_args *ap) 271 { 272 struct vnode *vp = ap->a_vp; 273 struct fnode *fp = VTOF(vp); 274 struct ntnode *ip = FTONT(fp); 275 int error; 276 277 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number)); 278 279 if (ntfs_prtactive && vp->v_sysref.refcnt > 1) 280 vprint("ntfs_reclaim: pushing active", vp); 281 282 if ((error = ntfs_ntget(ip)) != 0) 283 return (error); 284 285 ntfs_frele(fp); 286 ntfs_ntput(ip); 287 vp->v_data = NULL; 288 289 return (0); 290 } 291 292 /* 293 * ntfs_print(struct vnode *a_vp) 294 */ 295 static int 296 ntfs_print(struct vop_print_args *ap) 297 { 298 return (0); 299 } 300 301 /* 302 * Calculate the logical to physical mapping if not done already, 303 * then call the device strategy routine. 304 * 305 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio) 306 */ 307 int 308 ntfs_strategy(struct vop_strategy_args *ap) 309 { 310 struct bio *bio = ap->a_bio; 311 struct buf *bp = bio->bio_buf; 312 struct vnode *vp = ap->a_vp; 313 struct fnode *fp = VTOF(vp); 314 struct ntnode *ip = FTONT(fp); 315 struct ntfsmount *ntmp = ip->i_mp; 316 u_int32_t toread; 317 u_int32_t towrite; 318 size_t tmp; 319 int error; 320 321 dprintf(("ntfs_strategy: loffset: %lld, doffset: %lld\n", 322 bp->b_loffset, bio->bio_offset)); 323 324 dprintf(("strategy: bcount: %d flags: 0x%lx\n", 325 (u_int32_t)bp->b_bcount,bp->b_flags)); 326 327 bp->b_error = 0; 328 329 switch(bp->b_cmd) { 330 case BUF_CMD_READ: 331 if (bio->bio_offset >= fp->f_size) { 332 clrbuf(bp); 333 error = 0; 334 } else { 335 toread = min(bp->b_bcount, 336 fp->f_size - bio->bio_offset); 337 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 338 toread,(u_int32_t)fp->f_size)); 339 340 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 341 fp->f_attrname, bio->bio_offset, 342 toread, bp->b_data, NULL); 343 344 if (error) { 345 kprintf("ntfs_strategy: ntfs_readattr failed\n"); 346 bp->b_error = error; 347 bp->b_flags |= B_ERROR; 348 } 349 350 bzero(bp->b_data + toread, bp->b_bcount - toread); 351 } 352 break; 353 case BUF_CMD_WRITE: 354 if (bio->bio_offset + bp->b_bcount >= fp->f_size) { 355 kprintf("ntfs_strategy: CAN'T EXTEND FILE\n"); 356 bp->b_error = error = EFBIG; 357 bp->b_flags |= B_ERROR; 358 } else { 359 towrite = min(bp->b_bcount, 360 fp->f_size - bio->bio_offset); 361 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 362 towrite,(u_int32_t)fp->f_size)); 363 364 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 365 fp->f_attrname, bio->bio_offset,towrite, 366 bp->b_data, &tmp, NULL); 367 368 if (error) { 369 kprintf("ntfs_strategy: ntfs_writeattr fail\n"); 370 bp->b_error = error; 371 bp->b_flags |= B_ERROR; 372 } 373 } 374 break; 375 default: 376 panic("ntfs: bad b_cmd %d\n", bp->b_cmd); 377 } 378 biodone(bio); 379 return (error); 380 } 381 382 /* 383 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 384 * struct ucred *a_cred) 385 */ 386 static int 387 ntfs_write(struct vop_write_args *ap) 388 { 389 struct vnode *vp = ap->a_vp; 390 struct fnode *fp = VTOF(vp); 391 struct ntnode *ip = FTONT(fp); 392 struct uio *uio = ap->a_uio; 393 struct ntfsmount *ntmp = ip->i_mp; 394 size_t towrite; 395 size_t written; 396 int error; 397 398 dprintf(("ntfs_write: ino: %d, off: %d resid: %ld, segflg: %d\n", 399 ip->i_number, (u_int32_t)uio->uio_offset, 400 uio->uio_resid, uio->uio_segflg)); 401 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size)); 402 403 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 404 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 405 return (EFBIG); 406 } 407 if (uio->uio_offset > fp->f_size) 408 return (EFBIG); 409 410 towrite = szmin(uio->uio_resid, fp->f_size - uio->uio_offset); 411 412 dprintf((", towrite: %ld\n", towrite)); 413 414 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 415 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 416 #ifdef NTFS_DEBUG 417 if (error) 418 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error); 419 #endif 420 421 return (error); 422 } 423 424 /* 425 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 426 */ 427 int 428 ntfs_access(struct vop_access_args *ap) 429 { 430 struct vnode *vp = ap->a_vp; 431 struct ntnode *ip = VTONT(vp); 432 struct ucred *cred = ap->a_cred; 433 mode_t mask, mode = ap->a_mode; 434 gid_t *gp; 435 int i; 436 #ifdef QUOTA 437 int error; 438 #endif 439 440 dprintf(("ntfs_access: %d\n",ip->i_number)); 441 442 /* 443 * Disallow write attempts on read-only file systems; 444 * unless the file is a socket, fifo, or a block or 445 * character device resident on the file system. 446 */ 447 if (mode & VWRITE) { 448 switch ((int)vp->v_type) { 449 case VDIR: 450 case VLNK: 451 case VREG: 452 if (vp->v_mount->mnt_flag & MNT_RDONLY) 453 return (EROFS); 454 #ifdef QUOTA 455 if (error = getinoquota(ip)) 456 return (error); 457 #endif 458 break; 459 } 460 } 461 462 /* Otherwise, user id 0 always gets access. */ 463 if (cred->cr_uid == 0) 464 return (0); 465 466 mask = 0; 467 468 /* Otherwise, check the owner. */ 469 if (cred->cr_uid == ip->i_mp->ntm_uid) { 470 if (mode & VEXEC) 471 mask |= S_IXUSR; 472 if (mode & VREAD) 473 mask |= S_IRUSR; 474 if (mode & VWRITE) 475 mask |= S_IWUSR; 476 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES); 477 } 478 479 /* Otherwise, check the groups. */ 480 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 481 if (ip->i_mp->ntm_gid == *gp) { 482 if (mode & VEXEC) 483 mask |= S_IXGRP; 484 if (mode & VREAD) 485 mask |= S_IRGRP; 486 if (mode & VWRITE) 487 mask |= S_IWGRP; 488 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES); 489 } 490 491 /* Otherwise, check everyone else. */ 492 if (mode & VEXEC) 493 mask |= S_IXOTH; 494 if (mode & VREAD) 495 mask |= S_IROTH; 496 if (mode & VWRITE) 497 mask |= S_IWOTH; 498 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES); 499 } 500 501 /* 502 * Open called. 503 * 504 * Nothing to do. 505 * 506 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 507 * struct file *a_fp) 508 */ 509 /* ARGSUSED */ 510 static int 511 ntfs_open(struct vop_open_args *ap) 512 { 513 return (vop_stdopen(ap)); 514 } 515 516 /* 517 * Close called. 518 * 519 * Update the times on the inode. 520 * 521 * ntfs_close(struct vnode *a_vp, int a_fflag) 522 */ 523 /* ARGSUSED */ 524 static int 525 ntfs_close(struct vop_close_args *ap) 526 { 527 #if NTFS_DEBUG 528 struct vnode *vp = ap->a_vp; 529 struct ntnode *ip = VTONT(vp); 530 531 kprintf("ntfs_close: %d\n",ip->i_number); 532 #endif 533 534 return (vop_stdclose(ap)); 535 } 536 537 /* 538 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, 539 * int *a_ncookies, off_t **cookies) 540 */ 541 int 542 ntfs_readdir(struct vop_readdir_args *ap) 543 { 544 struct vnode *vp = ap->a_vp; 545 struct fnode *fp = VTOF(vp); 546 struct ntnode *ip = FTONT(fp); 547 struct uio *uio = ap->a_uio; 548 struct ntfsmount *ntmp = ip->i_mp; 549 int i, j, error = 0; 550 wchar c; 551 u_int32_t faked = 0, num, off; 552 int ncookies = 0; 553 char convname[NTFS_MAXFILENAME + 1]; 554 555 dprintf(("ntfs_readdir %d off: %d resid: %ld\n", 556 ip->i_number, (u_int32_t)uio->uio_offset, 557 uio->uio_resid)); 558 559 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX) 560 return (EINVAL); 561 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 562 return (error); 563 564 /* 565 * uio->uio_offset carries the number of the entry 566 * where we should start returning dirents. 567 * 568 * We fake up "." if we're not reading the FS root 569 * and we always fake up "..". 570 * 571 * off contains the entry we are starting at, 572 * num increments while we are reading. 573 */ 574 575 off = num = uio->uio_offset; 576 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 577 578 /* Simulate . in every dir except ROOT */ 579 if (ip->i_number != NTFS_ROOTINO && num == 0) { 580 if (vop_write_dirent(&error, uio, ip->i_number, 581 DT_DIR, 1, ".")) 582 goto done; 583 if (error) 584 goto done; 585 586 num++; 587 ncookies++; 588 } 589 590 /* Simulate .. in every dir including ROOT */ 591 if (num == faked - 1) { 592 /* XXX NTFS_ROOTINO seems to be wrong here */ 593 if (vop_write_dirent(&error, uio, NTFS_ROOTINO, 594 DT_DIR, 2, "..")) 595 goto readdone; 596 if (error) 597 goto done; 598 599 num++; 600 ncookies++; 601 } 602 603 for (;;) { 604 struct attr_indexentry *iep; 605 606 /* 607 * num is the number of the entry we will return, 608 * but ntfs_ntreaddir takes the entry number of the 609 * ntfs directory listing, so subtract the faked 610 * . and .. entries. 611 */ 612 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep); 613 614 if (error) 615 goto done; 616 617 if( NULL == iep ) 618 break; 619 620 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST); 621 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 622 { 623 if(!ntfs_isnamepermitted(ntmp,iep)) 624 continue; 625 for(i=0, j=0; i < iep->ie_fnamelen; i++, j++) { 626 c = NTFS_U28(iep->ie_fname[i]); 627 if (c&0xFF00) 628 convname[j++] = (char)(c>>8); 629 convname[j] = (char)c&0xFF; 630 } 631 convname[j] = '\0'; 632 if (vop_write_dirent(&error, uio, iep->ie_number, 633 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG, 634 j, convname)) 635 goto readdone; 636 637 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, " 638 "flag: %d, %s\n", 639 ncookies, convname, iep->ie_fnametype, 640 iep->ie_flag, 641 (iep->ie_fflag & NTFS_FFLAG_DIR) ? 642 "dir" : "reg")); 643 644 if (error) 645 goto done; 646 647 ncookies++; 648 num++; 649 } 650 } 651 652 readdone: 653 uio->uio_offset = num; 654 655 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 656 ncookies,(u_int)(uio->uio_offset - off))); 657 dprintf(("ntfs_readdir: off: %d resid: %ld\n", 658 (u_int32_t)uio->uio_offset, uio->uio_resid)); 659 660 if (!error && ap->a_ncookies != NULL) { 661 off_t *cookies; 662 off_t *cookiep; 663 664 ddprintf(("ntfs_readdir: %d cookies\n",ncookies)); 665 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 666 panic("ntfs_readdir: unexpected uio from NFS server"); 667 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK); 668 cookiep = cookies; 669 while (off < num) 670 *cookiep++ = ++off; 671 672 *ap->a_ncookies = ncookies; 673 *ap->a_cookies = cookies; 674 } 675 /* 676 if (ap->a_eofflag) 677 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset; 678 */ 679 done: 680 vn_unlock(vp); 681 return (error); 682 } 683 684 /* 685 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp, 686 * struct componentname *a_cnp) 687 */ 688 int 689 ntfs_lookup(struct vop_old_lookup_args *ap) 690 { 691 struct vnode *dvp = ap->a_dvp; 692 struct ntnode *dip = VTONT(dvp); 693 struct ntfsmount *ntmp = dip->i_mp; 694 struct componentname *cnp = ap->a_cnp; 695 int error; 696 int lockparent = cnp->cn_flags & CNP_LOCKPARENT; 697 #if NTFS_DEBUG 698 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT); 699 #endif 700 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n", 701 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen, 702 dip->i_number, lockparent, wantparent)); 703 704 *ap->a_vpp = NULL; 705 706 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 707 dprintf(("ntfs_lookup: faking . directory in %d\n", 708 dip->i_number)); 709 710 vref(dvp); 711 *ap->a_vpp = dvp; 712 error = 0; 713 } else if (cnp->cn_flags & CNP_ISDOTDOT) { 714 struct ntvattr *vap; 715 716 dprintf(("ntfs_lookup: faking .. directory in %d\n", 717 dip->i_number)); 718 719 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 720 if(error) 721 return (error); 722 723 VOP__UNLOCK(dvp, 0); 724 cnp->cn_flags |= CNP_PDIRUNLOCK; 725 726 dprintf(("ntfs_lookup: parentdir: %d\n", 727 vap->va_a_name->n_pnumber)); 728 error = VFS_VGET(ntmp->ntm_mountp, NULL, 729 vap->va_a_name->n_pnumber,ap->a_vpp); 730 ntfs_ntvattrrele(vap); 731 if (error) { 732 if (VN_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 733 cnp->cn_flags &= ~CNP_PDIRUNLOCK; 734 return (error); 735 } 736 737 if (lockparent) { 738 error = VN_LOCK(dvp, LK_EXCLUSIVE); 739 if (error) { 740 vput(*ap->a_vpp); 741 *ap->a_vpp = NULL; 742 return (error); 743 } 744 cnp->cn_flags &= ~CNP_PDIRUNLOCK; 745 } 746 } else { 747 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 748 if (error) { 749 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 750 return (error); 751 } 752 753 dprintf(("ntfs_lookup: found ino: %d\n", 754 VTONT(*ap->a_vpp)->i_number)); 755 756 if (!lockparent) 757 VOP__UNLOCK(dvp, 0); 758 } 759 return (error); 760 } 761 762 #if defined(__DragonFly__) 763 /* 764 * Flush the blocks of a file to disk. 765 * 766 * This function is worthless for vnodes that represent directories. Maybe we 767 * could just do a sync if they try an fsync on a directory file. 768 * 769 * ntfs_fsync(struct vnode *a_vp, int a_waitfor) 770 */ 771 static int 772 ntfs_fsync(struct vop_fsync_args *ap) 773 { 774 return (0); 775 } 776 #endif 777 778 /* 779 * Return POSIX pathconf information applicable to NTFS filesystem 780 */ 781 int 782 ntfs_pathconf(struct vop_pathconf_args *ap) 783 { 784 switch (ap->a_name) { 785 case _PC_LINK_MAX: 786 *ap->a_retval = 1; 787 return (0); 788 case _PC_NAME_MAX: 789 *ap->a_retval = NTFS_MAXFILENAME; 790 return (0); 791 case _PC_PATH_MAX: 792 *ap->a_retval = PATH_MAX; 793 return (0); 794 case _PC_CHOWN_RESTRICTED: 795 *ap->a_retval = 1; 796 return (0); 797 case _PC_NO_TRUNC: 798 *ap->a_retval = 0; 799 return (0); 800 #if defined(__NetBSD__) 801 case _PC_SYNC_IO: 802 *ap->a_retval = 1; 803 return (0); 804 case _PC_FILESIZEBITS: 805 *ap->a_retval = 64; 806 return (0); 807 #endif 808 default: 809 return (EINVAL); 810 } 811 /* NOTREACHED */ 812 } 813 814 /* 815 * Global vfs data structures 816 */ 817 struct vop_ops ntfs_vnode_vops = { 818 .vop_default = vop_defaultop, 819 .vop_getattr = ntfs_getattr, 820 .vop_inactive = ntfs_inactive, 821 .vop_reclaim = ntfs_reclaim, 822 .vop_print = ntfs_print, 823 .vop_pathconf = ntfs_pathconf, 824 .vop_old_lookup = ntfs_lookup, 825 .vop_access = ntfs_access, 826 .vop_close = ntfs_close, 827 .vop_open = ntfs_open, 828 .vop_readdir = ntfs_readdir, 829 .vop_fsync = ntfs_fsync, 830 .vop_bmap = ntfs_bmap, 831 .vop_getpages = vop_stdgetpages, 832 .vop_putpages = vop_stdputpages, 833 .vop_strategy = ntfs_strategy, 834 .vop_read = ntfs_read, 835 .vop_write = ntfs_write 836 }; 837 838