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 * $DragonFly: src/sys/vfs/ntfs/ntfs_vnops.c,v 1.44 2007/11/20 21:03:50 dillon Exp $ 40 * 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/time.h> 47 #include <sys/types.h> 48 #include <sys/stat.h> 49 #include <sys/vnode.h> 50 #include <sys/mount.h> 51 #include <sys/proc.h> 52 #include <sys/namei.h> 53 #include <sys/malloc.h> 54 #include <sys/buf.h> 55 #include <sys/dirent.h> 56 #include <machine/limits.h> 57 58 #include <vm/vm.h> 59 #include <vm/vm_param.h> 60 #if defined(__NetBSD__) 61 #include <vm/vm_prot.h> 62 #endif 63 #include <vm/vm_page.h> 64 #include <vm/vm_object.h> 65 #include <vm/vm_pager.h> 66 #if defined(__DragonFly__) 67 #include <vm/vnode_pager.h> 68 #endif 69 #include <vm/vm_extern.h> 70 71 #include <sys/sysctl.h> 72 73 /*#define NTFS_DEBUG 1*/ 74 #include "ntfs.h" 75 #include "ntfs_inode.h" 76 #include "ntfs_subr.h" 77 #if defined(__NetBSD__) 78 #include <miscfs/specfs/specdev.h> 79 #include <miscfs/genfs/genfs.h> 80 #endif 81 82 #include <sys/unistd.h> /* for pathconf(2) constants */ 83 84 static int ntfs_read (struct vop_read_args *); 85 static int ntfs_write (struct vop_write_args *ap); 86 static int ntfs_getattr (struct vop_getattr_args *ap); 87 static int ntfs_inactive (struct vop_inactive_args *ap); 88 static int ntfs_print (struct vop_print_args *ap); 89 static int ntfs_reclaim (struct vop_reclaim_args *ap); 90 static int ntfs_strategy (struct vop_strategy_args *ap); 91 static int ntfs_access (struct vop_access_args *ap); 92 static int ntfs_open (struct vop_open_args *ap); 93 static int ntfs_close (struct vop_close_args *ap); 94 static int ntfs_readdir (struct vop_readdir_args *ap); 95 static int ntfs_lookup (struct vop_old_lookup_args *ap); 96 static int ntfs_bmap (struct vop_bmap_args *ap); 97 #if defined(__DragonFly__) 98 static int ntfs_fsync (struct vop_fsync_args *ap); 99 #else 100 static int ntfs_bypass (struct vop_generic_args *); 101 #endif 102 static int ntfs_pathconf (struct vop_pathconf_args *); 103 104 int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */ 105 106 /* 107 * This is a noop, simply returning what one has been given. 108 * 109 * ntfs_bmap(struct vnode *a_vp, off_t a_loffset, 110 * daddr_t *a_doffsetp, int *a_runp, int *a_runb) 111 */ 112 int 113 ntfs_bmap(struct vop_bmap_args *ap) 114 { 115 dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn)); 116 if (ap->a_doffsetp != NULL) 117 *ap->a_doffsetp = ap->a_loffset; 118 if (ap->a_runp != NULL) 119 *ap->a_runp = 0; 120 #if !defined(__NetBSD__) 121 if (ap->a_runb != NULL) 122 *ap->a_runb = 0; 123 #endif 124 return (0); 125 } 126 127 /* 128 * ntfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 129 * struct ucred *a_cred) 130 */ 131 static int 132 ntfs_read(struct vop_read_args *ap) 133 { 134 struct vnode *vp = ap->a_vp; 135 struct fnode *fp = VTOF(vp); 136 struct ntnode *ip = FTONT(fp); 137 struct uio *uio = ap->a_uio; 138 struct ntfsmount *ntmp = ip->i_mp; 139 struct buf *bp; 140 daddr_t cn; 141 int resid, off, toread; 142 int error; 143 144 dprintf(("ntfs_read: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg)); 145 146 dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size)); 147 148 /* don't allow reading after end of file */ 149 if (uio->uio_offset > fp->f_size) 150 return (0); 151 152 resid = min(uio->uio_resid, fp->f_size - uio->uio_offset); 153 154 dprintf((", resid: %d\n", resid)); 155 156 error = 0; 157 while (resid) { 158 cn = ntfs_btocn(uio->uio_offset); 159 off = ntfs_btocnoff(uio->uio_offset); 160 161 toread = min(off + resid, ntfs_cntob(1)); 162 163 error = bread(vp, ntfs_cntodoff(cn), ntfs_cntob(1), &bp); 164 if (error) { 165 brelse(bp); 166 break; 167 } 168 169 error = uiomove(bp->b_data + off, toread - off, uio); 170 if(error) { 171 brelse(bp); 172 break; 173 } 174 brelse(bp); 175 176 resid -= toread - off; 177 } 178 179 return (error); 180 } 181 182 #if !defined(__DragonFly__) 183 184 /* 185 * ntfs_bypass() 186 */ 187 static int 188 ntfs_bypass(struct vop_generic_args *ap) 189 { 190 int error = ENOTTY; 191 dprintf(("ntfs_bypass: %s\n", ap->a_desc->sd_name)); 192 return (error); 193 } 194 195 #endif 196 197 /* 198 * ntfs_getattr(struct vnode *a_vp, struct vattr *a_vap) 199 */ 200 static int 201 ntfs_getattr(struct vop_getattr_args *ap) 202 { 203 struct vnode *vp = ap->a_vp; 204 struct fnode *fp = VTOF(vp); 205 struct ntnode *ip = FTONT(fp); 206 struct vattr *vap = ap->a_vap; 207 208 dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag)); 209 210 #if defined(__DragonFly__) 211 vap->va_fsid = dev2udev(ip->i_dev); 212 #else /* NetBSD */ 213 vap->va_fsid = ip->i_dev; 214 #endif 215 vap->va_fileid = ip->i_number; 216 vap->va_mode = ip->i_mp->ntm_mode; 217 vap->va_nlink = ip->i_nlink; 218 vap->va_uid = ip->i_mp->ntm_uid; 219 vap->va_gid = ip->i_mp->ntm_gid; 220 vap->va_rmajor = VNOVAL; 221 vap->va_rminor = VNOVAL; 222 vap->va_size = fp->f_size; 223 vap->va_bytes = fp->f_allocated; 224 vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access); 225 vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write); 226 vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create); 227 vap->va_flags = ip->i_flag; 228 vap->va_gen = 0; 229 vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps; 230 vap->va_type = vp->v_type; 231 vap->va_filerev = 0; 232 return (0); 233 } 234 235 236 /* 237 * Last reference to an ntnode. If necessary, write or delete it. 238 * 239 * ntfs_inactive(struct vnode *a_vp) 240 */ 241 int 242 ntfs_inactive(struct vop_inactive_args *ap) 243 { 244 struct vnode *vp = ap->a_vp; 245 #ifdef NTFS_DEBUG 246 struct ntnode *ip = VTONT(vp); 247 #endif 248 249 dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number)); 250 251 if (ntfs_prtactive && vp->v_sysref.refcnt > 1) 252 vprint("ntfs_inactive: pushing active", vp); 253 254 /* 255 * XXX since we don't support any filesystem changes 256 * right now, nothing more needs to be done 257 */ 258 return (0); 259 } 260 261 /* 262 * Reclaim an fnode/ntnode so that it can be used for other purposes. 263 * 264 * ntfs_reclaim(struct vnode *a_vp) 265 */ 266 int 267 ntfs_reclaim(struct vop_reclaim_args *ap) 268 { 269 struct vnode *vp = ap->a_vp; 270 struct fnode *fp = VTOF(vp); 271 struct ntnode *ip = FTONT(fp); 272 int error; 273 274 dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number)); 275 276 if (ntfs_prtactive && vp->v_sysref.refcnt > 1) 277 vprint("ntfs_reclaim: pushing active", vp); 278 279 if ((error = ntfs_ntget(ip)) != 0) 280 return (error); 281 282 ntfs_frele(fp); 283 ntfs_ntput(ip); 284 vp->v_data = NULL; 285 286 return (0); 287 } 288 289 /* 290 * ntfs_print(struct vnode *a_vp) 291 */ 292 static int 293 ntfs_print(struct vop_print_args *ap) 294 { 295 return (0); 296 } 297 298 /* 299 * Calculate the logical to physical mapping if not done already, 300 * then call the device strategy routine. 301 * 302 * ntfs_strategy(struct vnode *a_vp, struct bio *a_bio) 303 */ 304 int 305 ntfs_strategy(struct vop_strategy_args *ap) 306 { 307 struct bio *bio = ap->a_bio; 308 struct buf *bp = bio->bio_buf; 309 struct vnode *vp = ap->a_vp; 310 struct fnode *fp = VTOF(vp); 311 struct ntnode *ip = FTONT(fp); 312 struct ntfsmount *ntmp = ip->i_mp; 313 u_int32_t toread; 314 u_int32_t towrite; 315 size_t tmp; 316 int error; 317 318 dprintf(("ntfs_strategy: loffset: %lld, doffset: %lld\n", 319 bp->b_loffset, bio->bio_offset)); 320 321 dprintf(("strategy: bcount: %d flags: 0x%lx\n", 322 (u_int32_t)bp->b_bcount,bp->b_flags)); 323 324 bp->b_error = 0; 325 326 switch(bp->b_cmd) { 327 case BUF_CMD_READ: 328 if (bio->bio_offset >= fp->f_size) { 329 clrbuf(bp); 330 error = 0; 331 } else { 332 toread = min(bp->b_bcount, 333 fp->f_size - bio->bio_offset); 334 dprintf(("ntfs_strategy: toread: %d, fsize: %d\n", 335 toread,(u_int32_t)fp->f_size)); 336 337 error = ntfs_readattr(ntmp, ip, fp->f_attrtype, 338 fp->f_attrname, bio->bio_offset, 339 toread, bp->b_data, NULL); 340 341 if (error) { 342 kprintf("ntfs_strategy: ntfs_readattr failed\n"); 343 bp->b_error = error; 344 bp->b_flags |= B_ERROR; 345 } 346 347 bzero(bp->b_data + toread, bp->b_bcount - toread); 348 } 349 break; 350 case BUF_CMD_WRITE: 351 if (bio->bio_offset + bp->b_bcount >= fp->f_size) { 352 kprintf("ntfs_strategy: CAN'T EXTEND FILE\n"); 353 bp->b_error = error = EFBIG; 354 bp->b_flags |= B_ERROR; 355 } else { 356 towrite = min(bp->b_bcount, 357 fp->f_size - bio->bio_offset); 358 dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n", 359 towrite,(u_int32_t)fp->f_size)); 360 361 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 362 fp->f_attrname, bio->bio_offset,towrite, 363 bp->b_data, &tmp, NULL); 364 365 if (error) { 366 kprintf("ntfs_strategy: ntfs_writeattr fail\n"); 367 bp->b_error = error; 368 bp->b_flags |= B_ERROR; 369 } 370 } 371 break; 372 default: 373 panic("ntfs: bad b_cmd %d\n", bp->b_cmd); 374 } 375 biodone(bio); 376 return (error); 377 } 378 379 /* 380 * ntfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 381 * struct ucred *a_cred) 382 */ 383 static int 384 ntfs_write(struct vop_write_args *ap) 385 { 386 struct vnode *vp = ap->a_vp; 387 struct fnode *fp = VTOF(vp); 388 struct ntnode *ip = FTONT(fp); 389 struct uio *uio = ap->a_uio; 390 struct ntfsmount *ntmp = ip->i_mp; 391 u_int64_t towrite; 392 size_t written; 393 int error; 394 395 dprintf(("ntfs_write: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg)); 396 dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size)); 397 398 if (uio->uio_resid + uio->uio_offset > fp->f_size) { 399 kprintf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n"); 400 return (EFBIG); 401 } 402 403 towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset); 404 405 dprintf((", towrite: %d\n",(u_int32_t)towrite)); 406 407 error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype, 408 fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio); 409 #ifdef NTFS_DEBUG 410 if (error) 411 kprintf("ntfs_write: ntfs_writeattr failed: %d\n", error); 412 #endif 413 414 return (error); 415 } 416 417 /* 418 * ntfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 419 */ 420 int 421 ntfs_access(struct vop_access_args *ap) 422 { 423 struct vnode *vp = ap->a_vp; 424 struct ntnode *ip = VTONT(vp); 425 struct ucred *cred = ap->a_cred; 426 mode_t mask, mode = ap->a_mode; 427 gid_t *gp; 428 int i; 429 #ifdef QUOTA 430 int error; 431 #endif 432 433 dprintf(("ntfs_access: %d\n",ip->i_number)); 434 435 /* 436 * Disallow write attempts on read-only file systems; 437 * unless the file is a socket, fifo, or a block or 438 * character device resident on the file system. 439 */ 440 if (mode & VWRITE) { 441 switch ((int)vp->v_type) { 442 case VDIR: 443 case VLNK: 444 case VREG: 445 if (vp->v_mount->mnt_flag & MNT_RDONLY) 446 return (EROFS); 447 #ifdef QUOTA 448 if (error = getinoquota(ip)) 449 return (error); 450 #endif 451 break; 452 } 453 } 454 455 /* Otherwise, user id 0 always gets access. */ 456 if (cred->cr_uid == 0) 457 return (0); 458 459 mask = 0; 460 461 /* Otherwise, check the owner. */ 462 if (cred->cr_uid == ip->i_mp->ntm_uid) { 463 if (mode & VEXEC) 464 mask |= S_IXUSR; 465 if (mode & VREAD) 466 mask |= S_IRUSR; 467 if (mode & VWRITE) 468 mask |= S_IWUSR; 469 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES); 470 } 471 472 /* Otherwise, check the groups. */ 473 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 474 if (ip->i_mp->ntm_gid == *gp) { 475 if (mode & VEXEC) 476 mask |= S_IXGRP; 477 if (mode & VREAD) 478 mask |= S_IRGRP; 479 if (mode & VWRITE) 480 mask |= S_IWGRP; 481 return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES); 482 } 483 484 /* Otherwise, check everyone else. */ 485 if (mode & VEXEC) 486 mask |= S_IXOTH; 487 if (mode & VREAD) 488 mask |= S_IROTH; 489 if (mode & VWRITE) 490 mask |= S_IWOTH; 491 return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES); 492 } 493 494 /* 495 * Open called. 496 * 497 * Nothing to do. 498 * 499 * ntfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 500 * struct file *a_fp) 501 */ 502 /* ARGSUSED */ 503 static int 504 ntfs_open(struct vop_open_args *ap) 505 { 506 return (vop_stdopen(ap)); 507 } 508 509 /* 510 * Close called. 511 * 512 * Update the times on the inode. 513 * 514 * ntfs_close(struct vnode *a_vp, int a_fflag) 515 */ 516 /* ARGSUSED */ 517 static int 518 ntfs_close(struct vop_close_args *ap) 519 { 520 #if NTFS_DEBUG 521 struct vnode *vp = ap->a_vp; 522 struct ntnode *ip = VTONT(vp); 523 524 kprintf("ntfs_close: %d\n",ip->i_number); 525 #endif 526 527 return (vop_stdclose(ap)); 528 } 529 530 /* 531 * ntfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, 532 * int *a_ncookies, off_t **cookies) 533 */ 534 int 535 ntfs_readdir(struct vop_readdir_args *ap) 536 { 537 struct vnode *vp = ap->a_vp; 538 struct fnode *fp = VTOF(vp); 539 struct ntnode *ip = FTONT(fp); 540 struct uio *uio = ap->a_uio; 541 struct ntfsmount *ntmp = ip->i_mp; 542 int i, error = 0; 543 u_int32_t faked = 0, num, off; 544 int ncookies = 0; 545 char convname[NTFS_MAXFILENAME + 1]; 546 547 dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid)); 548 549 if (uio->uio_offset < 0 || uio->uio_offset > INT_MAX) 550 return (EINVAL); 551 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 552 return (error); 553 554 /* 555 * uio->uio_offset carries the number of the entry 556 * where we should start returning dirents. 557 * 558 * We fake up "." if we're not reading the FS root 559 * and we always fake up "..". 560 * 561 * off contains the entry we are starting at, 562 * num increments while we are reading. 563 */ 564 565 off = num = uio->uio_offset; 566 faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2; 567 568 /* Simulate . in every dir except ROOT */ 569 if (ip->i_number != NTFS_ROOTINO && num == 0) { 570 if (vop_write_dirent(&error, uio, ip->i_number, 571 DT_DIR, 1, ".")) 572 goto done; 573 if (error) 574 goto done; 575 576 num++; 577 ncookies++; 578 } 579 580 /* Simulate .. in every dir including ROOT */ 581 if (num == faked - 1) { 582 /* XXX NTFS_ROOTINO seems to be wrong here */ 583 if (vop_write_dirent(&error, uio, NTFS_ROOTINO, 584 DT_DIR, 2, "..")) 585 goto readdone; 586 if (error) 587 goto done; 588 589 num++; 590 ncookies++; 591 } 592 593 for (;;) { 594 struct attr_indexentry *iep; 595 596 /* 597 * num is the number of the entry we will return, 598 * but ntfs_ntreaddir takes the entry number of the 599 * ntfs directory listing, so subtract the faked 600 * . and .. entries. 601 */ 602 error = ntfs_ntreaddir(ntmp, fp, num - faked, &iep); 603 604 if (error) 605 goto done; 606 607 if( NULL == iep ) 608 break; 609 610 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST); 611 iep = NTFS_NEXTREC(iep, struct attr_indexentry *)) 612 { 613 if(!ntfs_isnamepermitted(ntmp,iep)) 614 continue; 615 616 for (i=0; i < iep->ie_fnamelen; i++) 617 convname[i] = NTFS_U28(iep->ie_fname[i]); 618 convname[i] = '\0'; 619 620 if (vop_write_dirent(&error, uio, iep->ie_number, 621 (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG, 622 iep->ie_fnamelen, convname)) 623 goto readdone; 624 625 dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, " 626 "flag: %d, %s\n", 627 ncookies, convname, iep->ie_fnametype, 628 iep->ie_flag, 629 (iep->ie_fflag & NTFS_FFLAG_DIR) ? 630 "dir" : "reg")); 631 632 if (error) 633 goto done; 634 635 ncookies++; 636 num++; 637 } 638 } 639 640 readdone: 641 uio->uio_offset = num; 642 643 dprintf(("ntfs_readdir: %d entries (%d bytes) read\n", 644 ncookies,(u_int)(uio->uio_offset - off))); 645 dprintf(("ntfs_readdir: off: %d resid: %d\n", 646 (u_int32_t)uio->uio_offset,uio->uio_resid)); 647 648 if (!error && ap->a_ncookies != NULL) { 649 off_t *cookies; 650 off_t *cookiep; 651 652 ddprintf(("ntfs_readdir: %d cookies\n",ncookies)); 653 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 654 panic("ntfs_readdir: unexpected uio from NFS server"); 655 MALLOC(cookies, off_t *, ncookies * sizeof(off_t), 656 M_TEMP, M_WAITOK); 657 cookiep = cookies; 658 while (off < num) 659 *cookiep++ = ++off; 660 661 *ap->a_ncookies = ncookies; 662 *ap->a_cookies = cookies; 663 } 664 /* 665 if (ap->a_eofflag) 666 *ap->a_eofflag = VTONT(vp)->i_size <= uio->uio_offset; 667 */ 668 done: 669 vn_unlock(vp); 670 return (error); 671 } 672 673 /* 674 * ntfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp, 675 * struct componentname *a_cnp) 676 */ 677 int 678 ntfs_lookup(struct vop_old_lookup_args *ap) 679 { 680 struct vnode *dvp = ap->a_dvp; 681 struct ntnode *dip = VTONT(dvp); 682 struct ntfsmount *ntmp = dip->i_mp; 683 struct componentname *cnp = ap->a_cnp; 684 int error; 685 int lockparent = cnp->cn_flags & CNP_LOCKPARENT; 686 #if NTFS_DEBUG 687 int wantparent = cnp->cn_flags & (CNP_LOCKPARENT | CNP_WANTPARENT); 688 #endif 689 dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n", 690 (int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen, 691 dip->i_number, lockparent, wantparent)); 692 693 *ap->a_vpp = NULL; 694 695 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 696 dprintf(("ntfs_lookup: faking . directory in %d\n", 697 dip->i_number)); 698 699 vref(dvp); 700 *ap->a_vpp = dvp; 701 error = 0; 702 } else if (cnp->cn_flags & CNP_ISDOTDOT) { 703 struct ntvattr *vap; 704 705 dprintf(("ntfs_lookup: faking .. directory in %d\n", 706 dip->i_number)); 707 708 error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap); 709 if(error) 710 return (error); 711 712 VOP__UNLOCK(dvp, 0); 713 cnp->cn_flags |= CNP_PDIRUNLOCK; 714 715 dprintf(("ntfs_lookup: parentdir: %d\n", 716 vap->va_a_name->n_pnumber)); 717 error = VFS_VGET(ntmp->ntm_mountp, 718 vap->va_a_name->n_pnumber,ap->a_vpp); 719 ntfs_ntvattrrele(vap); 720 if (error) { 721 if (VN_LOCK(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 722 cnp->cn_flags &= ~CNP_PDIRUNLOCK; 723 return (error); 724 } 725 726 if (lockparent) { 727 error = VN_LOCK(dvp, LK_EXCLUSIVE); 728 if (error) { 729 vput(*ap->a_vpp); 730 *ap->a_vpp = NULL; 731 return (error); 732 } 733 cnp->cn_flags &= ~CNP_PDIRUNLOCK; 734 } 735 } else { 736 error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp); 737 if (error) { 738 dprintf(("ntfs_ntlookupfile: returned %d\n", error)); 739 return (error); 740 } 741 742 dprintf(("ntfs_lookup: found ino: %d\n", 743 VTONT(*ap->a_vpp)->i_number)); 744 745 if (!lockparent) 746 VOP__UNLOCK(dvp, 0); 747 } 748 return (error); 749 } 750 751 #if defined(__DragonFly__) 752 /* 753 * Flush the blocks of a file to disk. 754 * 755 * This function is worthless for vnodes that represent directories. Maybe we 756 * could just do a sync if they try an fsync on a directory file. 757 * 758 * ntfs_fsync(struct vnode *a_vp, int a_waitfor) 759 */ 760 static int 761 ntfs_fsync(struct vop_fsync_args *ap) 762 { 763 return (0); 764 } 765 #endif 766 767 /* 768 * Return POSIX pathconf information applicable to NTFS filesystem 769 */ 770 int 771 ntfs_pathconf(struct vop_pathconf_args *ap) 772 { 773 switch (ap->a_name) { 774 case _PC_LINK_MAX: 775 *ap->a_retval = 1; 776 return (0); 777 case _PC_NAME_MAX: 778 *ap->a_retval = NTFS_MAXFILENAME; 779 return (0); 780 case _PC_PATH_MAX: 781 *ap->a_retval = PATH_MAX; 782 return (0); 783 case _PC_CHOWN_RESTRICTED: 784 *ap->a_retval = 1; 785 return (0); 786 case _PC_NO_TRUNC: 787 *ap->a_retval = 0; 788 return (0); 789 #if defined(__NetBSD__) 790 case _PC_SYNC_IO: 791 *ap->a_retval = 1; 792 return (0); 793 case _PC_FILESIZEBITS: 794 *ap->a_retval = 64; 795 return (0); 796 #endif 797 default: 798 return (EINVAL); 799 } 800 /* NOTREACHED */ 801 } 802 803 /* 804 * Global vfs data structures 805 */ 806 struct vop_ops ntfs_vnode_vops = { 807 .vop_default = vop_defaultop, 808 .vop_getattr = ntfs_getattr, 809 .vop_inactive = ntfs_inactive, 810 .vop_reclaim = ntfs_reclaim, 811 .vop_print = ntfs_print, 812 .vop_pathconf = ntfs_pathconf, 813 .vop_old_lookup = ntfs_lookup, 814 .vop_access = ntfs_access, 815 .vop_close = ntfs_close, 816 .vop_open = ntfs_open, 817 .vop_readdir = ntfs_readdir, 818 .vop_fsync = ntfs_fsync, 819 .vop_bmap = ntfs_bmap, 820 .vop_getpages = vop_stdgetpages, 821 .vop_putpages = vop_stdputpages, 822 .vop_strategy = ntfs_strategy, 823 .vop_read = ntfs_read, 824 .vop_write = ntfs_write 825 }; 826 827