1 /* $FreeBSD$ */ 2 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 3 4 /*- 5 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 6 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 7 * All rights reserved. 8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 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 TooLs GmbH. 21 * 4. The name of TooLs GmbH may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /*- 36 * Written by Paul Popelka (paulp@uts.amdahl.com) 37 * 38 * You can do anything you want with this software, just don't say you wrote 39 * it, and don't remove this notice. 40 * 41 * This software is provided "as is". 42 * 43 * The author supplies this software to be publicly redistributed on the 44 * understanding that the author is not responsible for the correct 45 * functioning of this software in any circumstances and is not liable for 46 * any damages caused by this software. 47 * 48 * October 1992 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/bio.h> 54 #include <sys/buf.h> 55 #include <sys/clock.h> 56 #include <sys/dirent.h> 57 #include <sys/lock.h> 58 #include <sys/lockf.h> 59 #include <sys/malloc.h> 60 #include <sys/mount.h> 61 #include <sys/mutex.h> 62 #include <sys/namei.h> 63 #include <sys/priv.h> 64 #include <sys/proc.h> 65 #include <sys/resourcevar.h> 66 #include <sys/signalvar.h> 67 #include <sys/stat.h> 68 #include <sys/unistd.h> 69 #include <sys/vnode.h> 70 71 #include <vm/vm.h> 72 #include <vm/vm_extern.h> 73 74 #include <fs/msdosfs/bpb.h> 75 #include <fs/msdosfs/direntry.h> 76 #include <fs/msdosfs/denode.h> 77 #include <fs/msdosfs/fat.h> 78 #include <fs/msdosfs/msdosfsmount.h> 79 80 #define DOS_FILESIZE_MAX 0xffffffff 81 82 /* 83 * Prototypes for MSDOSFS vnode operations 84 */ 85 static vop_create_t msdosfs_create; 86 static vop_mknod_t msdosfs_mknod; 87 static vop_open_t msdosfs_open; 88 static vop_close_t msdosfs_close; 89 static vop_access_t msdosfs_access; 90 static vop_getattr_t msdosfs_getattr; 91 static vop_setattr_t msdosfs_setattr; 92 static vop_read_t msdosfs_read; 93 static vop_write_t msdosfs_write; 94 static vop_fsync_t msdosfs_fsync; 95 static vop_remove_t msdosfs_remove; 96 static vop_link_t msdosfs_link; 97 static vop_rename_t msdosfs_rename; 98 static vop_mkdir_t msdosfs_mkdir; 99 static vop_rmdir_t msdosfs_rmdir; 100 static vop_symlink_t msdosfs_symlink; 101 static vop_readdir_t msdosfs_readdir; 102 static vop_bmap_t msdosfs_bmap; 103 static vop_strategy_t msdosfs_strategy; 104 static vop_print_t msdosfs_print; 105 static vop_pathconf_t msdosfs_pathconf; 106 static vop_vptofh_t msdosfs_vptofh; 107 108 /* 109 * Some general notes: 110 * 111 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 112 * read/written using the vnode for the filesystem. Blocks that represent 113 * the contents of a file are read/written using the vnode for the file 114 * (including directories when they are read/written as files). This 115 * presents problems for the dos filesystem because data that should be in 116 * an inode (if dos had them) resides in the directory itself. Since we 117 * must update directory entries without the benefit of having the vnode 118 * for the directory we must use the vnode for the filesystem. This means 119 * that when a directory is actually read/written (via read, write, or 120 * readdir, or seek) we must use the vnode for the filesystem instead of 121 * the vnode for the directory as would happen in ufs. This is to insure we 122 * retreive the correct block from the buffer cache since the hash value is 123 * based upon the vnode address and the desired block number. 124 */ 125 126 /* 127 * Create a regular file. On entry the directory to contain the file being 128 * created is locked. We must release before we return. We must also free 129 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 130 * only if the SAVESTART bit in cn_flags is clear on success. 131 */ 132 static int 133 msdosfs_create(ap) 134 struct vop_create_args /* { 135 struct vnode *a_dvp; 136 struct vnode **a_vpp; 137 struct componentname *a_cnp; 138 struct vattr *a_vap; 139 } */ *ap; 140 { 141 struct componentname *cnp = ap->a_cnp; 142 struct denode ndirent; 143 struct denode *dep; 144 struct denode *pdep = VTODE(ap->a_dvp); 145 struct timespec ts; 146 int error; 147 148 #ifdef MSDOSFS_DEBUG 149 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 150 #endif 151 152 /* 153 * If this is the root directory and there is no space left we 154 * can't do anything. This is because the root directory can not 155 * change size. 156 */ 157 if (pdep->de_StartCluster == MSDOSFSROOT 158 && pdep->de_fndoffset >= pdep->de_FileSize) { 159 error = ENOSPC; 160 goto bad; 161 } 162 163 /* 164 * Create a directory entry for the file, then call createde() to 165 * have it installed. NOTE: DOS files are always executable. We 166 * use the absence of the owner write bit to make the file 167 * readonly. 168 */ 169 #ifdef DIAGNOSTIC 170 if ((cnp->cn_flags & HASBUF) == 0) 171 panic("msdosfs_create: no name"); 172 #endif 173 bzero(&ndirent, sizeof(ndirent)); 174 error = uniqdosname(pdep, cnp, ndirent.de_Name); 175 if (error) 176 goto bad; 177 178 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 179 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 180 ndirent.de_LowerCase = 0; 181 ndirent.de_StartCluster = 0; 182 ndirent.de_FileSize = 0; 183 ndirent.de_dev = pdep->de_dev; 184 ndirent.de_pmp = pdep->de_pmp; 185 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 186 getnanotime(&ts); 187 DETIMES(&ndirent, &ts, &ts, &ts); 188 error = createde(&ndirent, pdep, &dep, cnp); 189 if (error) 190 goto bad; 191 *ap->a_vpp = DETOV(dep); 192 return (0); 193 194 bad: 195 return (error); 196 } 197 198 static int 199 msdosfs_mknod(ap) 200 struct vop_mknod_args /* { 201 struct vnode *a_dvp; 202 struct vnode **a_vpp; 203 struct componentname *a_cnp; 204 struct vattr *a_vap; 205 } */ *ap; 206 { 207 208 return (EINVAL); 209 } 210 211 static int 212 msdosfs_open(ap) 213 struct vop_open_args /* { 214 struct vnode *a_vp; 215 int a_mode; 216 struct ucred *a_cred; 217 struct thread *a_td; 218 int a_fdidx; 219 } */ *ap; 220 { 221 struct denode *dep = VTODE(ap->a_vp); 222 vnode_create_vobject(ap->a_vp, dep->de_FileSize, ap->a_td); 223 return 0; 224 } 225 226 static int 227 msdosfs_close(ap) 228 struct vop_close_args /* { 229 struct vnode *a_vp; 230 int a_fflag; 231 struct ucred *a_cred; 232 struct thread *a_td; 233 } */ *ap; 234 { 235 struct vnode *vp = ap->a_vp; 236 struct denode *dep = VTODE(vp); 237 struct timespec ts; 238 239 VI_LOCK(vp); 240 if (vp->v_usecount > 1) { 241 getnanotime(&ts); 242 DETIMES(dep, &ts, &ts, &ts); 243 } 244 VI_UNLOCK(vp); 245 return 0; 246 } 247 248 static int 249 msdosfs_access(ap) 250 struct vop_access_args /* { 251 struct vnode *a_vp; 252 int a_mode; 253 struct ucred *a_cred; 254 struct thread *a_td; 255 } */ *ap; 256 { 257 struct vnode *vp = ap->a_vp; 258 struct denode *dep = VTODE(ap->a_vp); 259 struct msdosfsmount *pmp = dep->de_pmp; 260 mode_t file_mode, mode = ap->a_mode; 261 262 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 263 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 264 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 265 266 /* 267 * Disallow writing to directories and regular files if the 268 * filesystem is read-only. 269 */ 270 if (mode & VWRITE) { 271 switch (vp->v_type) { 272 case VDIR: 273 case VREG: 274 if (vp->v_mount->mnt_flag & MNT_RDONLY) 275 return (EROFS); 276 break; 277 default: 278 break; 279 } 280 } 281 282 return (vaccess(vp->v_type, file_mode, pmp->pm_uid, pmp->pm_gid, 283 ap->a_mode, ap->a_cred, NULL)); 284 } 285 286 static int 287 msdosfs_getattr(ap) 288 struct vop_getattr_args /* { 289 struct vnode *a_vp; 290 struct vattr *a_vap; 291 struct ucred *a_cred; 292 } */ *ap; 293 { 294 struct denode *dep = VTODE(ap->a_vp); 295 struct msdosfsmount *pmp = dep->de_pmp; 296 struct vattr *vap = ap->a_vap; 297 mode_t mode; 298 struct timespec ts; 299 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 300 uint64_t fileid; 301 302 getnanotime(&ts); 303 DETIMES(dep, &ts, &ts, &ts); 304 vap->va_fsid = dev2udev(dep->de_dev); 305 /* 306 * The following computation of the fileid must be the same as that 307 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 308 * doesn't work. 309 */ 310 if (dep->de_Attributes & ATTR_DIRECTORY) { 311 fileid = (uint64_t)cntobn(pmp, dep->de_StartCluster) * 312 dirsperblk; 313 if (dep->de_StartCluster == MSDOSFSROOT) 314 fileid = 1; 315 } else { 316 fileid = (uint64_t)cntobn(pmp, dep->de_dirclust) * 317 dirsperblk; 318 if (dep->de_dirclust == MSDOSFSROOT) 319 fileid = (uint64_t)roottobn(pmp, 0) * dirsperblk; 320 fileid += (uoff_t)dep->de_diroffset / sizeof(struct direntry); 321 } 322 323 if (pmp->pm_flags & MSDOSFS_LARGEFS) 324 vap->va_fileid = msdosfs_fileno_map(pmp->pm_mountp, fileid); 325 else 326 vap->va_fileid = (long)fileid; 327 328 if ((dep->de_Attributes & ATTR_READONLY) == 0) 329 mode = S_IRWXU|S_IRWXG|S_IRWXO; 330 else 331 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 332 vap->va_mode = mode & 333 (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 334 vap->va_uid = pmp->pm_uid; 335 vap->va_gid = pmp->pm_gid; 336 vap->va_nlink = 1; 337 vap->va_rdev = NODEV; 338 vap->va_size = dep->de_FileSize; 339 fattime2timespec(dep->de_MDate, dep->de_MTime, 0, 0, &vap->va_mtime); 340 vap->va_ctime = vap->va_mtime; 341 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 342 fattime2timespec(dep->de_ADate, 0, 0, 0, &vap->va_atime); 343 fattime2timespec(dep->de_CDate, dep->de_CTime, dep->de_CHun, 344 0, &vap->va_birthtime); 345 } else { 346 vap->va_atime = vap->va_mtime; 347 vap->va_birthtime.tv_sec = -1; 348 vap->va_birthtime.tv_nsec = 0; 349 } 350 vap->va_flags = 0; 351 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 352 vap->va_flags |= SF_ARCHIVED; 353 vap->va_gen = 0; 354 vap->va_blocksize = pmp->pm_bpcluster; 355 vap->va_bytes = 356 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 357 vap->va_type = ap->a_vp->v_type; 358 vap->va_filerev = dep->de_modrev; 359 return (0); 360 } 361 362 static int 363 msdosfs_setattr(ap) 364 struct vop_setattr_args /* { 365 struct vnode *a_vp; 366 struct vattr *a_vap; 367 struct ucred *a_cred; 368 } */ *ap; 369 { 370 struct vnode *vp = ap->a_vp; 371 struct denode *dep = VTODE(ap->a_vp); 372 struct msdosfsmount *pmp = dep->de_pmp; 373 struct vattr *vap = ap->a_vap; 374 struct ucred *cred = ap->a_cred; 375 struct thread *td = curthread; 376 int error = 0; 377 378 #ifdef MSDOSFS_DEBUG 379 printf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 380 ap->a_vp, vap, cred); 381 #endif 382 383 /* 384 * Check for unsettable attributes. 385 */ 386 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 387 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 388 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 389 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 390 #ifdef MSDOSFS_DEBUG 391 printf("msdosfs_setattr(): returning EINVAL\n"); 392 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 393 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 394 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 395 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 396 printf(" va_uid %x, va_gid %x\n", 397 vap->va_uid, vap->va_gid); 398 #endif 399 return (EINVAL); 400 } 401 if (vap->va_flags != VNOVAL) { 402 if (vp->v_mount->mnt_flag & MNT_RDONLY) 403 return (EROFS); 404 if (cred->cr_uid != pmp->pm_uid) { 405 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0); 406 if (error) 407 return (error); 408 } 409 /* 410 * We are very inconsistent about handling unsupported 411 * attributes. We ignored the access time and the 412 * read and execute bits. We were strict for the other 413 * attributes. 414 * 415 * Here we are strict, stricter than ufs in not allowing 416 * users to attempt to set SF_SETTABLE bits or anyone to 417 * set unsupported bits. However, we ignore attempts to 418 * set ATTR_ARCHIVE for directories `cp -pr' from a more 419 * sensible filesystem attempts it a lot. 420 */ 421 if (vap->va_flags & SF_SETTABLE) { 422 error = priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0); 423 if (error) 424 return (error); 425 } 426 if (vap->va_flags & ~SF_ARCHIVED) 427 return EOPNOTSUPP; 428 if (vap->va_flags & SF_ARCHIVED) 429 dep->de_Attributes &= ~ATTR_ARCHIVE; 430 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 431 dep->de_Attributes |= ATTR_ARCHIVE; 432 dep->de_flag |= DE_MODIFIED; 433 } 434 435 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 436 uid_t uid; 437 gid_t gid; 438 439 if (vp->v_mount->mnt_flag & MNT_RDONLY) 440 return (EROFS); 441 uid = vap->va_uid; 442 if (uid == (uid_t)VNOVAL) 443 uid = pmp->pm_uid; 444 gid = vap->va_gid; 445 if (gid == (gid_t)VNOVAL) 446 gid = pmp->pm_gid; 447 if (cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 448 (gid != pmp->pm_gid && !groupmember(gid, cred))) { 449 error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0); 450 if (error) 451 return (error); 452 } 453 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 454 return EINVAL; 455 } 456 457 if (vap->va_size != VNOVAL) { 458 switch (vp->v_type) { 459 case VDIR: 460 return (EISDIR); 461 case VREG: 462 /* 463 * Truncation is only supported for regular files, 464 * Disallow it if the filesystem is read-only. 465 */ 466 if (vp->v_mount->mnt_flag & MNT_RDONLY) 467 return (EROFS); 468 break; 469 default: 470 /* 471 * According to POSIX, the result is unspecified 472 * for file types other than regular files, 473 * directories and shared memory objects. We 474 * don't support any file types except regular 475 * files and directories in this file system, so 476 * this (default) case is unreachable and can do 477 * anything. Keep falling through to detrunc() 478 * for now. 479 */ 480 break; 481 } 482 error = detrunc(dep, vap->va_size, 0, cred, td); 483 if (error) 484 return error; 485 } 486 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 487 if (vp->v_mount->mnt_flag & MNT_RDONLY) 488 return (EROFS); 489 if (vap->va_vaflags & VA_UTIMES_NULL) { 490 error = VOP_ACCESS(vp, VADMIN, cred, td); 491 if (error) 492 error = VOP_ACCESS(vp, VWRITE, cred, td); 493 } else 494 error = VOP_ACCESS(vp, VADMIN, cred, td); 495 if (vp->v_type != VDIR) { 496 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 497 vap->va_atime.tv_sec != VNOVAL) { 498 dep->de_flag &= ~DE_ACCESS; 499 timespec2fattime(&vap->va_atime, 0, 500 &dep->de_ADate, NULL, NULL); 501 } 502 if (vap->va_mtime.tv_sec != VNOVAL) { 503 dep->de_flag &= ~DE_UPDATE; 504 timespec2fattime(&vap->va_mtime, 0, 505 &dep->de_MDate, &dep->de_MTime, NULL); 506 } 507 dep->de_Attributes |= ATTR_ARCHIVE; 508 dep->de_flag |= DE_MODIFIED; 509 } 510 } 511 /* 512 * DOS files only have the ability to have their writability 513 * attribute set, so we use the owner write bit to set the readonly 514 * attribute. 515 */ 516 if (vap->va_mode != (mode_t)VNOVAL) { 517 if (vp->v_mount->mnt_flag & MNT_RDONLY) 518 return (EROFS); 519 if (cred->cr_uid != pmp->pm_uid) { 520 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0); 521 if (error) 522 return (error); 523 } 524 if (vp->v_type != VDIR) { 525 /* We ignore the read and execute bits. */ 526 if (vap->va_mode & VWRITE) 527 dep->de_Attributes &= ~ATTR_READONLY; 528 else 529 dep->de_Attributes |= ATTR_READONLY; 530 dep->de_Attributes |= ATTR_ARCHIVE; 531 dep->de_flag |= DE_MODIFIED; 532 } 533 } 534 return (deupdat(dep, 0)); 535 } 536 537 static int 538 msdosfs_read(ap) 539 struct vop_read_args /* { 540 struct vnode *a_vp; 541 struct uio *a_uio; 542 int a_ioflag; 543 struct ucred *a_cred; 544 } */ *ap; 545 { 546 int error = 0; 547 int blsize; 548 int isadir; 549 int orig_resid; 550 u_int n; 551 u_long diff; 552 u_long on; 553 daddr_t lbn; 554 daddr_t rablock; 555 int rasize; 556 int seqcount; 557 struct buf *bp; 558 struct vnode *vp = ap->a_vp; 559 struct denode *dep = VTODE(vp); 560 struct msdosfsmount *pmp = dep->de_pmp; 561 struct uio *uio = ap->a_uio; 562 563 /* 564 * If they didn't ask for any data, then we are done. 565 */ 566 orig_resid = uio->uio_resid; 567 if (orig_resid == 0) 568 return (0); 569 570 /* 571 * The caller is supposed to ensure that 572 * uio->uio_offset >= 0 and uio->uio_resid >= 0. 573 * We don't need to check for large offsets as in ffs because 574 * dep->de_FileSize <= DOS_FILESIZE_MAX < OFF_MAX, so large 575 * offsets cannot cause overflow even in theory. 576 */ 577 578 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 579 580 isadir = dep->de_Attributes & ATTR_DIRECTORY; 581 do { 582 if (uio->uio_offset >= dep->de_FileSize) 583 break; 584 lbn = de_cluster(pmp, uio->uio_offset); 585 rablock = lbn + 1; 586 blsize = pmp->pm_bpcluster; 587 on = uio->uio_offset & pmp->pm_crbomask; 588 /* 589 * If we are operating on a directory file then be sure to 590 * do i/o with the vnode for the filesystem instead of the 591 * vnode for the directory. 592 */ 593 if (isadir) { 594 /* convert cluster # to block # */ 595 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 596 if (error == E2BIG) { 597 error = EINVAL; 598 break; 599 } else if (error) 600 break; 601 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 602 } else if (de_cn2off(pmp, rablock) >= dep->de_FileSize) { 603 error = bread(vp, lbn, blsize, NOCRED, &bp); 604 } else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 605 error = cluster_read(vp, dep->de_FileSize, lbn, blsize, 606 NOCRED, on + uio->uio_resid, seqcount, &bp); 607 } else if (seqcount > 1) { 608 rasize = blsize; 609 error = breadn(vp, lbn, 610 blsize, &rablock, &rasize, 1, NOCRED, &bp); 611 } else { 612 error = bread(vp, lbn, blsize, NOCRED, &bp); 613 } 614 if (error) { 615 brelse(bp); 616 break; 617 } 618 diff = pmp->pm_bpcluster - on; 619 n = diff > uio->uio_resid ? uio->uio_resid : diff; 620 diff = dep->de_FileSize - uio->uio_offset; 621 if (diff < n) 622 n = diff; 623 diff = blsize - bp->b_resid; 624 if (diff < n) 625 n = diff; 626 error = uiomove(bp->b_data + on, (int) n, uio); 627 brelse(bp); 628 } while (error == 0 && uio->uio_resid > 0 && n != 0); 629 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 630 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 631 dep->de_flag |= DE_ACCESS; 632 return (error); 633 } 634 635 /* 636 * Write data to a file or directory. 637 */ 638 static int 639 msdosfs_write(ap) 640 struct vop_write_args /* { 641 struct vnode *a_vp; 642 struct uio *a_uio; 643 int a_ioflag; 644 struct ucred *a_cred; 645 } */ *ap; 646 { 647 int n; 648 int croffset; 649 int resid; 650 u_long osize; 651 int error = 0; 652 u_long count; 653 int seqcount; 654 daddr_t bn, lastcn; 655 struct buf *bp; 656 int ioflag = ap->a_ioflag; 657 struct uio *uio = ap->a_uio; 658 struct thread *td = uio->uio_td; 659 struct vnode *vp = ap->a_vp; 660 struct vnode *thisvp; 661 struct denode *dep = VTODE(vp); 662 struct msdosfsmount *pmp = dep->de_pmp; 663 struct ucred *cred = ap->a_cred; 664 665 #ifdef MSDOSFS_DEBUG 666 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 667 vp, uio, ioflag, cred); 668 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 669 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 670 #endif 671 672 switch (vp->v_type) { 673 case VREG: 674 if (ioflag & IO_APPEND) 675 uio->uio_offset = dep->de_FileSize; 676 thisvp = vp; 677 break; 678 case VDIR: 679 return EISDIR; 680 default: 681 panic("msdosfs_write(): bad file type"); 682 } 683 684 /* 685 * This is needed (unlike in ffs_write()) because we extend the 686 * file outside of the loop but we don't want to extend the file 687 * for writes of 0 bytes. 688 */ 689 if (uio->uio_resid == 0) 690 return (0); 691 692 /* 693 * The caller is supposed to ensure that 694 * uio->uio_offset >= 0 and uio->uio_resid >= 0. 695 */ 696 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 697 return (EFBIG); 698 699 /* 700 * If they've exceeded their filesize limit, tell them about it. 701 */ 702 if (td != NULL) { 703 PROC_LOCK(td->td_proc); 704 if ((uoff_t)uio->uio_offset + uio->uio_resid > 705 lim_cur(td->td_proc, RLIMIT_FSIZE)) { 706 psignal(td->td_proc, SIGXFSZ); 707 PROC_UNLOCK(td->td_proc); 708 return (EFBIG); 709 } 710 PROC_UNLOCK(td->td_proc); 711 } 712 713 /* 714 * If the offset we are starting the write at is beyond the end of 715 * the file, then they've done a seek. Unix filesystems allow 716 * files with holes in them, DOS doesn't so we must fill the hole 717 * with zeroed blocks. 718 */ 719 if (uio->uio_offset > dep->de_FileSize) { 720 error = deextend(dep, uio->uio_offset, cred); 721 if (error) 722 return (error); 723 } 724 725 /* 726 * Remember some values in case the write fails. 727 */ 728 resid = uio->uio_resid; 729 osize = dep->de_FileSize; 730 731 /* 732 * If we write beyond the end of the file, extend it to its ultimate 733 * size ahead of the time to hopefully get a contiguous area. 734 */ 735 if (uio->uio_offset + resid > osize) { 736 count = de_clcount(pmp, uio->uio_offset + resid) - 737 de_clcount(pmp, osize); 738 error = extendfile(dep, count, NULL, NULL, 0); 739 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 740 goto errexit; 741 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 742 } else 743 lastcn = de_clcount(pmp, osize) - 1; 744 745 seqcount = ioflag >> IO_SEQSHIFT; 746 do { 747 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 748 error = ENOSPC; 749 break; 750 } 751 752 croffset = uio->uio_offset & pmp->pm_crbomask; 753 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 754 if (uio->uio_offset + n > dep->de_FileSize) { 755 dep->de_FileSize = uio->uio_offset + n; 756 /* The object size needs to be set before buffer is allocated */ 757 vnode_pager_setsize(vp, dep->de_FileSize); 758 } 759 760 bn = de_cluster(pmp, uio->uio_offset); 761 if ((uio->uio_offset & pmp->pm_crbomask) == 0 762 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 763 > de_cluster(pmp, uio->uio_offset) 764 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 765 /* 766 * If either the whole cluster gets written, 767 * or we write the cluster from its start beyond EOF, 768 * then no need to read data from disk. 769 */ 770 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0, 0); 771 vfs_bio_clrbuf(bp); 772 /* 773 * Do the bmap now, since pcbmap needs buffers 774 * for the fat table. (see msdosfs_strategy) 775 */ 776 if (bp->b_blkno == bp->b_lblkno) { 777 error = pcbmap(dep, bp->b_lblkno, &bn, 0, 0); 778 if (error) 779 bp->b_blkno = -1; 780 else 781 bp->b_blkno = bn; 782 } 783 if (bp->b_blkno == -1) { 784 brelse(bp); 785 if (!error) 786 error = EIO; /* XXX */ 787 break; 788 } 789 } else { 790 /* 791 * The block we need to write into exists, so read it in. 792 */ 793 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 794 if (error) { 795 brelse(bp); 796 break; 797 } 798 } 799 800 /* 801 * Should these vnode_pager_* functions be done on dir 802 * files? 803 */ 804 805 /* 806 * Copy the data from user space into the buf header. 807 */ 808 error = uiomove(bp->b_data + croffset, n, uio); 809 if (error) { 810 brelse(bp); 811 break; 812 } 813 814 /* Prepare for clustered writes in some else clauses. */ 815 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) 816 bp->b_flags |= B_CLUSTEROK; 817 818 /* 819 * If IO_SYNC, then each buffer is written synchronously. 820 * Otherwise, if we have a severe page deficiency then 821 * write the buffer asynchronously. Otherwise, if on a 822 * cluster boundary then write the buffer asynchronously, 823 * combining it with contiguous clusters if permitted and 824 * possible, since we don't expect more writes into this 825 * buffer soon. Otherwise, do a delayed write because we 826 * expect more writes into this buffer soon. 827 */ 828 if (ioflag & IO_SYNC) 829 (void)bwrite(bp); 830 else if (vm_page_count_severe() || buf_dirty_count_severe()) 831 bawrite(bp); 832 else if (n + croffset == pmp->pm_bpcluster) { 833 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) 834 cluster_write(vp, bp, dep->de_FileSize, 835 seqcount); 836 else 837 bawrite(bp); 838 } else 839 bdwrite(bp); 840 dep->de_flag |= DE_UPDATE; 841 } while (error == 0 && uio->uio_resid > 0); 842 843 /* 844 * If the write failed and they want us to, truncate the file back 845 * to the size it was before the write was attempted. 846 */ 847 errexit: 848 if (error) { 849 if (ioflag & IO_UNIT) { 850 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 851 uio->uio_offset -= resid - uio->uio_resid; 852 uio->uio_resid = resid; 853 } else { 854 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 855 if (uio->uio_resid != resid) 856 error = 0; 857 } 858 } else if (ioflag & IO_SYNC) 859 error = deupdat(dep, 1); 860 return (error); 861 } 862 863 /* 864 * Flush the blocks of a file to disk. 865 * 866 * This function is worthless for vnodes that represent directories. Maybe we 867 * could just do a sync if they try an fsync on a directory file. 868 */ 869 static int 870 msdosfs_fsync(ap) 871 struct vop_fsync_args /* { 872 struct vnode *a_vp; 873 struct ucred *a_cred; 874 int a_waitfor; 875 struct thread *a_td; 876 } */ *ap; 877 { 878 879 vop_stdfsync(ap); 880 return (deupdat(VTODE(ap->a_vp), ap->a_waitfor == MNT_WAIT)); 881 } 882 883 static int 884 msdosfs_remove(ap) 885 struct vop_remove_args /* { 886 struct vnode *a_dvp; 887 struct vnode *a_vp; 888 struct componentname *a_cnp; 889 } */ *ap; 890 { 891 struct denode *dep = VTODE(ap->a_vp); 892 struct denode *ddep = VTODE(ap->a_dvp); 893 int error; 894 895 if (ap->a_vp->v_type == VDIR) 896 error = EPERM; 897 else 898 error = removede(ddep, dep); 899 #ifdef MSDOSFS_DEBUG 900 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 901 #endif 902 return (error); 903 } 904 905 /* 906 * DOS filesystems don't know what links are. 907 */ 908 static int 909 msdosfs_link(ap) 910 struct vop_link_args /* { 911 struct vnode *a_tdvp; 912 struct vnode *a_vp; 913 struct componentname *a_cnp; 914 } */ *ap; 915 { 916 return (EOPNOTSUPP); 917 } 918 919 /* 920 * Renames on files require moving the denode to a new hash queue since the 921 * denode's location is used to compute which hash queue to put the file 922 * in. Unless it is a rename in place. For example "mv a b". 923 * 924 * What follows is the basic algorithm: 925 * 926 * if (file move) { 927 * if (dest file exists) { 928 * remove dest file 929 * } 930 * if (dest and src in same directory) { 931 * rewrite name in existing directory slot 932 * } else { 933 * write new entry in dest directory 934 * update offset and dirclust in denode 935 * move denode to new hash chain 936 * clear old directory entry 937 * } 938 * } else { 939 * directory move 940 * if (dest directory exists) { 941 * if (dest is not empty) { 942 * return ENOTEMPTY 943 * } 944 * remove dest directory 945 * } 946 * if (dest and src in same directory) { 947 * rewrite name in existing entry 948 * } else { 949 * be sure dest is not a child of src directory 950 * write entry in dest directory 951 * update "." and ".." in moved directory 952 * clear old directory entry for moved directory 953 * } 954 * } 955 * 956 * On entry: 957 * source's parent directory is unlocked 958 * source file or directory is unlocked 959 * destination's parent directory is locked 960 * destination file or directory is locked if it exists 961 * 962 * On exit: 963 * all denodes should be released 964 */ 965 static int 966 msdosfs_rename(ap) 967 struct vop_rename_args /* { 968 struct vnode *a_fdvp; 969 struct vnode *a_fvp; 970 struct componentname *a_fcnp; 971 struct vnode *a_tdvp; 972 struct vnode *a_tvp; 973 struct componentname *a_tcnp; 974 } */ *ap; 975 { 976 struct vnode *tdvp = ap->a_tdvp; 977 struct vnode *fvp = ap->a_fvp; 978 struct vnode *fdvp = ap->a_fdvp; 979 struct vnode *tvp = ap->a_tvp; 980 struct componentname *tcnp = ap->a_tcnp; 981 struct componentname *fcnp = ap->a_fcnp; 982 struct denode *ip, *xp, *dp, *zp; 983 u_char toname[12], oldname[11]; 984 u_long from_diroffset, to_diroffset; 985 u_char to_count; 986 int doingdirectory = 0, newparent = 0; 987 int error; 988 u_long cn; 989 daddr_t bn; 990 struct denode *fddep; /* from file's parent directory */ 991 struct msdosfsmount *pmp; 992 struct direntry *dotdotp; 993 struct buf *bp; 994 995 fddep = VTODE(ap->a_fdvp); 996 pmp = fddep->de_pmp; 997 998 pmp = VFSTOMSDOSFS(fdvp->v_mount); 999 1000 #ifdef DIAGNOSTIC 1001 if ((tcnp->cn_flags & HASBUF) == 0 || 1002 (fcnp->cn_flags & HASBUF) == 0) 1003 panic("msdosfs_rename: no name"); 1004 #endif 1005 /* 1006 * Check for cross-device rename. 1007 */ 1008 if (fvp->v_mount != tdvp->v_mount || 1009 (tvp && fvp->v_mount != tvp->v_mount)) { 1010 error = EXDEV; 1011 abortit: 1012 if (tdvp == tvp) 1013 vrele(tdvp); 1014 else 1015 vput(tdvp); 1016 if (tvp) 1017 vput(tvp); 1018 vrele(fdvp); 1019 vrele(fvp); 1020 return (error); 1021 } 1022 1023 /* 1024 * If source and dest are the same, do nothing. 1025 */ 1026 if (tvp == fvp) { 1027 error = 0; 1028 goto abortit; 1029 } 1030 1031 error = vn_lock(fvp, LK_EXCLUSIVE); 1032 if (error) 1033 goto abortit; 1034 dp = VTODE(fdvp); 1035 ip = VTODE(fvp); 1036 1037 /* 1038 * Be sure we are not renaming ".", "..", or an alias of ".". This 1039 * leads to a crippled directory tree. It's pretty tough to do a 1040 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1041 * doesn't work if the ".." entry is missing. 1042 */ 1043 if (ip->de_Attributes & ATTR_DIRECTORY) { 1044 /* 1045 * Avoid ".", "..", and aliases of "." for obvious reasons. 1046 */ 1047 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1048 dp == ip || 1049 (fcnp->cn_flags & ISDOTDOT) || 1050 (tcnp->cn_flags & ISDOTDOT) || 1051 (ip->de_flag & DE_RENAME)) { 1052 VOP_UNLOCK(fvp, 0); 1053 error = EINVAL; 1054 goto abortit; 1055 } 1056 ip->de_flag |= DE_RENAME; 1057 doingdirectory++; 1058 } 1059 1060 /* 1061 * When the target exists, both the directory 1062 * and target vnodes are returned locked. 1063 */ 1064 dp = VTODE(tdvp); 1065 xp = tvp ? VTODE(tvp) : NULL; 1066 /* 1067 * Remember direntry place to use for destination 1068 */ 1069 to_diroffset = dp->de_fndoffset; 1070 to_count = dp->de_fndcnt; 1071 1072 /* 1073 * If ".." must be changed (ie the directory gets a new 1074 * parent) then the source directory must not be in the 1075 * directory heirarchy above the target, as this would 1076 * orphan everything below the source directory. Also 1077 * the user must have write permission in the source so 1078 * as to be able to change "..". We must repeat the call 1079 * to namei, as the parent directory is unlocked by the 1080 * call to doscheckpath(). 1081 */ 1082 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); 1083 VOP_UNLOCK(fvp, 0); 1084 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1085 newparent = 1; 1086 if (doingdirectory && newparent) { 1087 if (error) /* write access check above */ 1088 goto bad; 1089 if (xp != NULL) 1090 vput(tvp); 1091 /* 1092 * doscheckpath() vput()'s dp, 1093 * so we have to do a relookup afterwards 1094 */ 1095 error = doscheckpath(ip, dp); 1096 if (error) 1097 goto out; 1098 if ((tcnp->cn_flags & SAVESTART) == 0) 1099 panic("msdosfs_rename: lost to startdir"); 1100 error = relookup(tdvp, &tvp, tcnp); 1101 if (error) 1102 goto out; 1103 dp = VTODE(tdvp); 1104 xp = tvp ? VTODE(tvp) : NULL; 1105 } 1106 1107 if (xp != NULL) { 1108 /* 1109 * Target must be empty if a directory and have no links 1110 * to it. Also, ensure source and target are compatible 1111 * (both directories, or both not directories). 1112 */ 1113 if (xp->de_Attributes & ATTR_DIRECTORY) { 1114 if (!dosdirempty(xp)) { 1115 error = ENOTEMPTY; 1116 goto bad; 1117 } 1118 if (!doingdirectory) { 1119 error = ENOTDIR; 1120 goto bad; 1121 } 1122 cache_purge(tdvp); 1123 } else if (doingdirectory) { 1124 error = EISDIR; 1125 goto bad; 1126 } 1127 error = removede(dp, xp); 1128 if (error) 1129 goto bad; 1130 vput(tvp); 1131 xp = NULL; 1132 } 1133 1134 /* 1135 * Convert the filename in tcnp into a dos filename. We copy this 1136 * into the denode and directory entry for the destination 1137 * file/directory. 1138 */ 1139 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1140 if (error) 1141 goto abortit; 1142 1143 /* 1144 * Since from wasn't locked at various places above, 1145 * have to do a relookup here. 1146 */ 1147 fcnp->cn_flags &= ~MODMASK; 1148 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1149 if ((fcnp->cn_flags & SAVESTART) == 0) 1150 panic("msdosfs_rename: lost from startdir"); 1151 if (!newparent) 1152 VOP_UNLOCK(tdvp, 0); 1153 if (relookup(fdvp, &fvp, fcnp) == 0) 1154 vrele(fdvp); 1155 if (fvp == NULL) { 1156 /* 1157 * From name has disappeared. 1158 */ 1159 if (doingdirectory) 1160 panic("rename: lost dir entry"); 1161 if (newparent) 1162 VOP_UNLOCK(tdvp, 0); 1163 vrele(tdvp); 1164 vrele(ap->a_fvp); 1165 return 0; 1166 } 1167 xp = VTODE(fvp); 1168 zp = VTODE(fdvp); 1169 from_diroffset = zp->de_fndoffset; 1170 1171 /* 1172 * Ensure that the directory entry still exists and has not 1173 * changed till now. If the source is a file the entry may 1174 * have been unlinked or renamed. In either case there is 1175 * no further work to be done. If the source is a directory 1176 * then it cannot have been rmdir'ed or renamed; this is 1177 * prohibited by the DE_RENAME flag. 1178 */ 1179 if (xp != ip) { 1180 if (doingdirectory) 1181 panic("rename: lost dir entry"); 1182 VOP_UNLOCK(fvp, 0); 1183 if (newparent) 1184 VOP_UNLOCK(fdvp, 0); 1185 vrele(ap->a_fvp); 1186 xp = NULL; 1187 } else { 1188 vrele(fvp); 1189 xp = NULL; 1190 1191 /* 1192 * First write a new entry in the destination 1193 * directory and mark the entry in the source directory 1194 * as deleted. Then move the denode to the correct hash 1195 * chain for its new location in the filesystem. And, if 1196 * we moved a directory, then update its .. entry to point 1197 * to the new parent directory. 1198 */ 1199 bcopy(ip->de_Name, oldname, 11); 1200 bcopy(toname, ip->de_Name, 11); /* update denode */ 1201 dp->de_fndoffset = to_diroffset; 1202 dp->de_fndcnt = to_count; 1203 error = createde(ip, dp, (struct denode **)0, tcnp); 1204 if (error) { 1205 bcopy(oldname, ip->de_Name, 11); 1206 if (newparent) 1207 VOP_UNLOCK(fdvp, 0); 1208 VOP_UNLOCK(fvp, 0); 1209 goto bad; 1210 } 1211 ip->de_refcnt++; 1212 zp->de_fndoffset = from_diroffset; 1213 error = removede(zp, ip); 1214 if (error) { 1215 /* XXX should downgrade to ro here, fs is corrupt */ 1216 if (newparent) 1217 VOP_UNLOCK(fdvp, 0); 1218 VOP_UNLOCK(fvp, 0); 1219 goto bad; 1220 } 1221 if (!doingdirectory) { 1222 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1223 &ip->de_dirclust, 0); 1224 if (error) { 1225 /* XXX should downgrade to ro here, fs is corrupt */ 1226 if (newparent) 1227 VOP_UNLOCK(fdvp, 0); 1228 VOP_UNLOCK(fvp, 0); 1229 goto bad; 1230 } 1231 if (ip->de_dirclust == MSDOSFSROOT) 1232 ip->de_diroffset = to_diroffset; 1233 else 1234 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1235 } 1236 reinsert(ip); 1237 if (newparent) 1238 VOP_UNLOCK(fdvp, 0); 1239 } 1240 1241 /* 1242 * If we moved a directory to a new parent directory, then we must 1243 * fixup the ".." entry in the moved directory. 1244 */ 1245 if (doingdirectory && newparent) { 1246 cn = ip->de_StartCluster; 1247 if (cn == MSDOSFSROOT) { 1248 /* this should never happen */ 1249 panic("msdosfs_rename(): updating .. in root directory?"); 1250 } else 1251 bn = cntobn(pmp, cn); 1252 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1253 NOCRED, &bp); 1254 if (error) { 1255 /* XXX should downgrade to ro here, fs is corrupt */ 1256 brelse(bp); 1257 VOP_UNLOCK(fvp, 0); 1258 goto bad; 1259 } 1260 dotdotp = (struct direntry *)bp->b_data + 1; 1261 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1262 if (FAT32(pmp)) 1263 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1264 if (fvp->v_mount->mnt_flag & MNT_ASYNC) 1265 bdwrite(bp); 1266 else if ((error = bwrite(bp)) != 0) { 1267 /* XXX should downgrade to ro here, fs is corrupt */ 1268 VOP_UNLOCK(fvp, 0); 1269 goto bad; 1270 } 1271 } 1272 1273 VOP_UNLOCK(fvp, 0); 1274 bad: 1275 if (xp) 1276 vput(tvp); 1277 vput(tdvp); 1278 out: 1279 ip->de_flag &= ~DE_RENAME; 1280 vrele(fdvp); 1281 vrele(fvp); 1282 return (error); 1283 1284 } 1285 1286 static struct { 1287 struct direntry dot; 1288 struct direntry dotdot; 1289 } dosdirtemplate = { 1290 { ". ", " ", /* the . entry */ 1291 ATTR_DIRECTORY, /* file attribute */ 1292 0, /* reserved */ 1293 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1294 { 0, 0 }, /* access date */ 1295 { 0, 0 }, /* high bits of start cluster */ 1296 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1297 { 0, 0 }, /* startcluster */ 1298 { 0, 0, 0, 0 } /* filesize */ 1299 }, 1300 { ".. ", " ", /* the .. entry */ 1301 ATTR_DIRECTORY, /* file attribute */ 1302 0, /* reserved */ 1303 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1304 { 0, 0 }, /* access date */ 1305 { 0, 0 }, /* high bits of start cluster */ 1306 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1307 { 0, 0 }, /* startcluster */ 1308 { 0, 0, 0, 0 } /* filesize */ 1309 } 1310 }; 1311 1312 static int 1313 msdosfs_mkdir(ap) 1314 struct vop_mkdir_args /* { 1315 struct vnode *a_dvp; 1316 struct vnode **a_vpp; 1317 struvt componentname *a_cnp; 1318 struct vattr *a_vap; 1319 } */ *ap; 1320 { 1321 struct componentname *cnp = ap->a_cnp; 1322 struct denode *dep; 1323 struct denode *pdep = VTODE(ap->a_dvp); 1324 struct direntry *denp; 1325 struct msdosfsmount *pmp = pdep->de_pmp; 1326 struct buf *bp; 1327 u_long newcluster, pcl; 1328 int bn; 1329 int error; 1330 struct denode ndirent; 1331 struct timespec ts; 1332 1333 /* 1334 * If this is the root directory and there is no space left we 1335 * can't do anything. This is because the root directory can not 1336 * change size. 1337 */ 1338 if (pdep->de_StartCluster == MSDOSFSROOT 1339 && pdep->de_fndoffset >= pdep->de_FileSize) { 1340 error = ENOSPC; 1341 goto bad2; 1342 } 1343 1344 /* 1345 * Allocate a cluster to hold the about to be created directory. 1346 */ 1347 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1348 if (error) 1349 goto bad2; 1350 1351 bzero(&ndirent, sizeof(ndirent)); 1352 ndirent.de_pmp = pmp; 1353 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1354 getnanotime(&ts); 1355 DETIMES(&ndirent, &ts, &ts, &ts); 1356 1357 /* 1358 * Now fill the cluster with the "." and ".." entries. And write 1359 * the cluster to disk. This way it is there for the parent 1360 * directory to be pointing at if there were a crash. 1361 */ 1362 bn = cntobn(pmp, newcluster); 1363 /* always succeeds */ 1364 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0, 0); 1365 bzero(bp->b_data, pmp->pm_bpcluster); 1366 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1367 denp = (struct direntry *)bp->b_data; 1368 putushort(denp[0].deStartCluster, newcluster); 1369 putushort(denp[0].deCDate, ndirent.de_CDate); 1370 putushort(denp[0].deCTime, ndirent.de_CTime); 1371 denp[0].deCHundredth = ndirent.de_CHun; 1372 putushort(denp[0].deADate, ndirent.de_ADate); 1373 putushort(denp[0].deMDate, ndirent.de_MDate); 1374 putushort(denp[0].deMTime, ndirent.de_MTime); 1375 pcl = pdep->de_StartCluster; 1376 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1377 pcl = 0; 1378 putushort(denp[1].deStartCluster, pcl); 1379 putushort(denp[1].deCDate, ndirent.de_CDate); 1380 putushort(denp[1].deCTime, ndirent.de_CTime); 1381 denp[1].deCHundredth = ndirent.de_CHun; 1382 putushort(denp[1].deADate, ndirent.de_ADate); 1383 putushort(denp[1].deMDate, ndirent.de_MDate); 1384 putushort(denp[1].deMTime, ndirent.de_MTime); 1385 if (FAT32(pmp)) { 1386 putushort(denp[0].deHighClust, newcluster >> 16); 1387 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1388 } 1389 1390 if (ap->a_dvp->v_mount->mnt_flag & MNT_ASYNC) 1391 bdwrite(bp); 1392 else if ((error = bwrite(bp)) != 0) 1393 goto bad; 1394 1395 /* 1396 * Now build up a directory entry pointing to the newly allocated 1397 * cluster. This will be written to an empty slot in the parent 1398 * directory. 1399 */ 1400 #ifdef DIAGNOSTIC 1401 if ((cnp->cn_flags & HASBUF) == 0) 1402 panic("msdosfs_mkdir: no name"); 1403 #endif 1404 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1405 if (error) 1406 goto bad; 1407 1408 ndirent.de_Attributes = ATTR_DIRECTORY; 1409 ndirent.de_LowerCase = 0; 1410 ndirent.de_StartCluster = newcluster; 1411 ndirent.de_FileSize = 0; 1412 ndirent.de_dev = pdep->de_dev; 1413 error = createde(&ndirent, pdep, &dep, cnp); 1414 if (error) 1415 goto bad; 1416 *ap->a_vpp = DETOV(dep); 1417 return (0); 1418 1419 bad: 1420 clusterfree(pmp, newcluster, NULL); 1421 bad2: 1422 return (error); 1423 } 1424 1425 static int 1426 msdosfs_rmdir(ap) 1427 struct vop_rmdir_args /* { 1428 struct vnode *a_dvp; 1429 struct vnode *a_vp; 1430 struct componentname *a_cnp; 1431 } */ *ap; 1432 { 1433 struct vnode *vp = ap->a_vp; 1434 struct vnode *dvp = ap->a_dvp; 1435 struct componentname *cnp = ap->a_cnp; 1436 struct denode *ip, *dp; 1437 struct thread *td = cnp->cn_thread; 1438 int error; 1439 1440 ip = VTODE(vp); 1441 dp = VTODE(dvp); 1442 1443 /* 1444 * Verify the directory is empty (and valid). 1445 * (Rmdir ".." won't be valid since 1446 * ".." will contain a reference to 1447 * the current directory and thus be 1448 * non-empty.) 1449 */ 1450 error = 0; 1451 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1452 error = ENOTEMPTY; 1453 goto out; 1454 } 1455 /* 1456 * Delete the entry from the directory. For dos filesystems this 1457 * gets rid of the directory entry on disk, the in memory copy 1458 * still exists but the de_refcnt is <= 0. This prevents it from 1459 * being found by deget(). When the vput() on dep is done we give 1460 * up access and eventually msdosfs_reclaim() will be called which 1461 * will remove it from the denode cache. 1462 */ 1463 error = removede(dp, ip); 1464 if (error) 1465 goto out; 1466 /* 1467 * This is where we decrement the link count in the parent 1468 * directory. Since dos filesystems don't do this we just purge 1469 * the name cache. 1470 */ 1471 cache_purge(dvp); 1472 VOP_UNLOCK(dvp, 0); 1473 /* 1474 * Truncate the directory that is being deleted. 1475 */ 1476 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, td); 1477 cache_purge(vp); 1478 1479 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1480 out: 1481 return (error); 1482 } 1483 1484 /* 1485 * DOS filesystems don't know what symlinks are. 1486 */ 1487 static int 1488 msdosfs_symlink(ap) 1489 struct vop_symlink_args /* { 1490 struct vnode *a_dvp; 1491 struct vnode **a_vpp; 1492 struct componentname *a_cnp; 1493 struct vattr *a_vap; 1494 char *a_target; 1495 } */ *ap; 1496 { 1497 return (EOPNOTSUPP); 1498 } 1499 1500 static int 1501 msdosfs_readdir(ap) 1502 struct vop_readdir_args /* { 1503 struct vnode *a_vp; 1504 struct uio *a_uio; 1505 struct ucred *a_cred; 1506 int *a_eofflag; 1507 int *a_ncookies; 1508 u_long **a_cookies; 1509 } */ *ap; 1510 { 1511 struct mbnambuf nb; 1512 int error = 0; 1513 int diff; 1514 long n; 1515 int blsize; 1516 long on; 1517 u_long cn; 1518 uint64_t fileno; 1519 u_long dirsperblk; 1520 long bias = 0; 1521 daddr_t bn, lbn; 1522 struct buf *bp; 1523 struct denode *dep = VTODE(ap->a_vp); 1524 struct msdosfsmount *pmp = dep->de_pmp; 1525 struct direntry *dentp; 1526 struct dirent dirbuf; 1527 struct uio *uio = ap->a_uio; 1528 u_long *cookies = NULL; 1529 int ncookies = 0; 1530 off_t offset, off; 1531 int chksum = -1; 1532 1533 #ifdef MSDOSFS_DEBUG 1534 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1535 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1536 #endif 1537 1538 /* 1539 * msdosfs_readdir() won't operate properly on regular files since 1540 * it does i/o only with the the filesystem vnode, and hence can 1541 * retrieve the wrong block from the buffer cache for a plain file. 1542 * So, fail attempts to readdir() on a plain file. 1543 */ 1544 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1545 return (ENOTDIR); 1546 1547 /* 1548 * To be safe, initialize dirbuf 1549 */ 1550 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1551 1552 /* 1553 * If the user buffer is smaller than the size of one dos directory 1554 * entry or the file offset is not a multiple of the size of a 1555 * directory entry, then we fail the read. 1556 */ 1557 off = offset = uio->uio_offset; 1558 if (uio->uio_resid < sizeof(struct direntry) || 1559 (offset & (sizeof(struct direntry) - 1))) 1560 return (EINVAL); 1561 1562 if (ap->a_ncookies) { 1563 ncookies = uio->uio_resid / 16; 1564 cookies = malloc(ncookies * sizeof(u_long), M_TEMP, 1565 M_WAITOK); 1566 *ap->a_cookies = cookies; 1567 *ap->a_ncookies = ncookies; 1568 } 1569 1570 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1571 1572 /* 1573 * If they are reading from the root directory then, we simulate 1574 * the . and .. entries since these don't exist in the root 1575 * directory. We also set the offset bias to make up for having to 1576 * simulate these entries. By this I mean that at file offset 64 we 1577 * read the first entry in the root directory that lives on disk. 1578 */ 1579 if (dep->de_StartCluster == MSDOSFSROOT 1580 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1581 #if 0 1582 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1583 offset); 1584 #endif 1585 bias = 2 * sizeof(struct direntry); 1586 if (offset < bias) { 1587 for (n = (int)offset / sizeof(struct direntry); 1588 n < 2; n++) { 1589 if (FAT32(pmp)) 1590 fileno = (uint64_t)cntobn(pmp, 1591 pmp->pm_rootdirblk) 1592 * dirsperblk; 1593 else 1594 fileno = 1; 1595 if (pmp->pm_flags & MSDOSFS_LARGEFS) { 1596 dirbuf.d_fileno = 1597 msdosfs_fileno_map(pmp->pm_mountp, 1598 fileno); 1599 } else { 1600 1601 dirbuf.d_fileno = (uint32_t)fileno; 1602 } 1603 dirbuf.d_type = DT_DIR; 1604 switch (n) { 1605 case 0: 1606 dirbuf.d_namlen = 1; 1607 strcpy(dirbuf.d_name, "."); 1608 break; 1609 case 1: 1610 dirbuf.d_namlen = 2; 1611 strcpy(dirbuf.d_name, ".."); 1612 break; 1613 } 1614 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1615 if (uio->uio_resid < dirbuf.d_reclen) 1616 goto out; 1617 error = uiomove(&dirbuf, dirbuf.d_reclen, uio); 1618 if (error) 1619 goto out; 1620 offset += sizeof(struct direntry); 1621 off = offset; 1622 if (cookies) { 1623 *cookies++ = offset; 1624 if (--ncookies <= 0) 1625 goto out; 1626 } 1627 } 1628 } 1629 } 1630 1631 mbnambuf_init(&nb); 1632 off = offset; 1633 while (uio->uio_resid > 0) { 1634 lbn = de_cluster(pmp, offset - bias); 1635 on = (offset - bias) & pmp->pm_crbomask; 1636 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1637 diff = dep->de_FileSize - (offset - bias); 1638 if (diff <= 0) 1639 break; 1640 n = min(n, diff); 1641 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1642 if (error) 1643 break; 1644 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1645 if (error) { 1646 brelse(bp); 1647 return (error); 1648 } 1649 n = min(n, blsize - bp->b_resid); 1650 if (n == 0) { 1651 brelse(bp); 1652 return (EIO); 1653 } 1654 1655 /* 1656 * Convert from dos directory entries to fs-independent 1657 * directory entries. 1658 */ 1659 for (dentp = (struct direntry *)(bp->b_data + on); 1660 (char *)dentp < bp->b_data + on + n; 1661 dentp++, offset += sizeof(struct direntry)) { 1662 #if 0 1663 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1664 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1665 #endif 1666 /* 1667 * If this is an unused entry, we can stop. 1668 */ 1669 if (dentp->deName[0] == SLOT_EMPTY) { 1670 brelse(bp); 1671 goto out; 1672 } 1673 /* 1674 * Skip deleted entries. 1675 */ 1676 if (dentp->deName[0] == SLOT_DELETED) { 1677 chksum = -1; 1678 mbnambuf_init(&nb); 1679 continue; 1680 } 1681 1682 /* 1683 * Handle Win95 long directory entries 1684 */ 1685 if (dentp->deAttributes == ATTR_WIN95) { 1686 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1687 continue; 1688 chksum = win2unixfn(&nb, 1689 (struct winentry *)dentp, chksum, pmp); 1690 continue; 1691 } 1692 1693 /* 1694 * Skip volume labels 1695 */ 1696 if (dentp->deAttributes & ATTR_VOLUME) { 1697 chksum = -1; 1698 mbnambuf_init(&nb); 1699 continue; 1700 } 1701 /* 1702 * This computation of d_fileno must match 1703 * the computation of va_fileid in 1704 * msdosfs_getattr. 1705 */ 1706 if (dentp->deAttributes & ATTR_DIRECTORY) { 1707 fileno = getushort(dentp->deStartCluster); 1708 if (FAT32(pmp)) 1709 fileno |= getushort(dentp->deHighClust) << 16; 1710 /* if this is the root directory */ 1711 if (fileno == MSDOSFSROOT) 1712 if (FAT32(pmp)) 1713 fileno = (uint64_t)cntobn(pmp, 1714 pmp->pm_rootdirblk) 1715 * dirsperblk; 1716 else 1717 fileno = 1; 1718 else 1719 fileno = (uint64_t)cntobn(pmp, fileno) * 1720 dirsperblk; 1721 dirbuf.d_type = DT_DIR; 1722 } else { 1723 fileno = (uoff_t)offset / 1724 sizeof(struct direntry); 1725 dirbuf.d_type = DT_REG; 1726 } 1727 if (pmp->pm_flags & MSDOSFS_LARGEFS) { 1728 dirbuf.d_fileno = 1729 msdosfs_fileno_map(pmp->pm_mountp, fileno); 1730 } else 1731 dirbuf.d_fileno = (uint32_t)fileno; 1732 1733 if (chksum != winChksum(dentp)) { 1734 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1735 (u_char *)dirbuf.d_name, 1736 dentp->deLowerCase | 1737 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1738 (LCASE_BASE | LCASE_EXT) : 0), 1739 pmp); 1740 mbnambuf_init(&nb); 1741 } else 1742 mbnambuf_flush(&nb, &dirbuf); 1743 chksum = -1; 1744 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1745 if (uio->uio_resid < dirbuf.d_reclen) { 1746 brelse(bp); 1747 goto out; 1748 } 1749 error = uiomove(&dirbuf, dirbuf.d_reclen, uio); 1750 if (error) { 1751 brelse(bp); 1752 goto out; 1753 } 1754 if (cookies) { 1755 *cookies++ = offset + sizeof(struct direntry); 1756 if (--ncookies <= 0) { 1757 brelse(bp); 1758 goto out; 1759 } 1760 } 1761 off = offset + sizeof(struct direntry); 1762 } 1763 brelse(bp); 1764 } 1765 out: 1766 /* Subtract unused cookies */ 1767 if (ap->a_ncookies) 1768 *ap->a_ncookies -= ncookies; 1769 1770 uio->uio_offset = off; 1771 1772 /* 1773 * Set the eofflag (NFS uses it) 1774 */ 1775 if (ap->a_eofflag) { 1776 if (dep->de_FileSize - (offset - bias) <= 0) 1777 *ap->a_eofflag = 1; 1778 else 1779 *ap->a_eofflag = 0; 1780 } 1781 return (error); 1782 } 1783 1784 /*- 1785 * a_vp - pointer to the file's vnode 1786 * a_bn - logical block number within the file (cluster number for us) 1787 * a_bop - where to return the bufobj of the special file containing the fs 1788 * a_bnp - where to return the "physical" block number corresponding to a_bn 1789 * (relative to the special file; units are blocks of size DEV_BSIZE) 1790 * a_runp - where to return the "run past" a_bn. This is the count of logical 1791 * blocks whose physical blocks (together with a_bn's physical block) 1792 * are contiguous. 1793 * a_runb - where to return the "run before" a_bn. 1794 */ 1795 static int 1796 msdosfs_bmap(ap) 1797 struct vop_bmap_args /* { 1798 struct vnode *a_vp; 1799 daddr_t a_bn; 1800 struct bufobj **a_bop; 1801 daddr_t *a_bnp; 1802 int *a_runp; 1803 int *a_runb; 1804 } */ *ap; 1805 { 1806 struct denode *dep; 1807 struct mount *mp; 1808 struct msdosfsmount *pmp; 1809 struct vnode *vp; 1810 daddr_t runbn; 1811 u_long cn; 1812 int bnpercn, error, maxio, maxrun, run; 1813 1814 vp = ap->a_vp; 1815 dep = VTODE(vp); 1816 pmp = dep->de_pmp; 1817 if (ap->a_bop != NULL) 1818 *ap->a_bop = &pmp->pm_devvp->v_bufobj; 1819 if (ap->a_bnp == NULL) 1820 return (0); 1821 if (ap->a_runp != NULL) 1822 *ap->a_runp = 0; 1823 if (ap->a_runb != NULL) 1824 *ap->a_runb = 0; 1825 cn = ap->a_bn; 1826 if (cn != ap->a_bn) 1827 return (EFBIG); 1828 error = pcbmap(dep, cn, ap->a_bnp, NULL, NULL); 1829 if (error != 0 || (ap->a_runp == NULL && ap->a_runb == NULL)) 1830 return (error); 1831 1832 mp = vp->v_mount; 1833 maxio = mp->mnt_iosize_max / mp->mnt_stat.f_iosize; 1834 bnpercn = de_cn2bn(pmp, 1); 1835 if (ap->a_runp != NULL) { 1836 maxrun = ulmin(maxio - 1, pmp->pm_maxcluster - cn); 1837 for (run = 1; run <= maxrun; run++) { 1838 if (pcbmap(dep, cn + run, &runbn, NULL, NULL) != 0 || 1839 runbn != *ap->a_bnp + run * bnpercn) 1840 break; 1841 } 1842 *ap->a_runp = run - 1; 1843 } 1844 if (ap->a_runb != NULL) { 1845 maxrun = ulmin(maxio - 1, cn); 1846 for (run = 1; run < maxrun; run++) { 1847 if (pcbmap(dep, cn - run, &runbn, NULL, NULL) != 0 || 1848 runbn != *ap->a_bnp - run * bnpercn) 1849 break; 1850 } 1851 *ap->a_runb = run - 1; 1852 } 1853 return (0); 1854 } 1855 1856 static int 1857 msdosfs_strategy(ap) 1858 struct vop_strategy_args /* { 1859 struct vnode *a_vp; 1860 struct buf *a_bp; 1861 } */ *ap; 1862 { 1863 struct buf *bp = ap->a_bp; 1864 struct denode *dep = VTODE(ap->a_vp); 1865 struct bufobj *bo; 1866 int error = 0; 1867 daddr_t blkno; 1868 1869 /* 1870 * If we don't already know the filesystem relative block number 1871 * then get it using pcbmap(). If pcbmap() returns the block 1872 * number as -1 then we've got a hole in the file. DOS filesystems 1873 * don't allow files with holes, so we shouldn't ever see this. 1874 */ 1875 if (bp->b_blkno == bp->b_lblkno) { 1876 error = pcbmap(dep, bp->b_lblkno, &blkno, 0, 0); 1877 bp->b_blkno = blkno; 1878 if (error) { 1879 bp->b_error = error; 1880 bp->b_ioflags |= BIO_ERROR; 1881 bufdone(bp); 1882 return (error); 1883 } 1884 if ((long)bp->b_blkno == -1) 1885 vfs_bio_clrbuf(bp); 1886 } 1887 if (bp->b_blkno == -1) { 1888 bufdone(bp); 1889 return (0); 1890 } 1891 /* 1892 * Read/write the block from/to the disk that contains the desired 1893 * file block. 1894 */ 1895 bp->b_iooffset = dbtob(bp->b_blkno); 1896 bo = dep->de_pmp->pm_bo; 1897 BO_STRATEGY(bo, bp); 1898 return (0); 1899 } 1900 1901 static int 1902 msdosfs_print(ap) 1903 struct vop_print_args /* { 1904 struct vnode *vp; 1905 } */ *ap; 1906 { 1907 struct denode *dep = VTODE(ap->a_vp); 1908 1909 printf("\tstartcluster %lu, dircluster %lu, diroffset %lu, ", 1910 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1911 printf("on dev %s\n", devtoname(dep->de_dev)); 1912 return (0); 1913 } 1914 1915 static int 1916 msdosfs_pathconf(ap) 1917 struct vop_pathconf_args /* { 1918 struct vnode *a_vp; 1919 int a_name; 1920 int *a_retval; 1921 } */ *ap; 1922 { 1923 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1924 1925 switch (ap->a_name) { 1926 case _PC_LINK_MAX: 1927 *ap->a_retval = 1; 1928 return (0); 1929 case _PC_NAME_MAX: 1930 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1931 return (0); 1932 case _PC_PATH_MAX: 1933 *ap->a_retval = PATH_MAX; 1934 return (0); 1935 case _PC_CHOWN_RESTRICTED: 1936 *ap->a_retval = 1; 1937 return (0); 1938 case _PC_NO_TRUNC: 1939 *ap->a_retval = 0; 1940 return (0); 1941 default: 1942 return (EINVAL); 1943 } 1944 /* NOTREACHED */ 1945 } 1946 1947 static int 1948 msdosfs_vptofh(ap) 1949 struct vop_vptofh_args /* { 1950 struct vnode *a_vp; 1951 struct fid *a_fhp; 1952 } */ *ap; 1953 { 1954 struct denode *dep; 1955 struct defid *defhp; 1956 1957 dep = VTODE(ap->a_vp); 1958 defhp = (struct defid *)ap->a_fhp; 1959 defhp->defid_len = sizeof(struct defid); 1960 defhp->defid_dirclust = dep->de_dirclust; 1961 defhp->defid_dirofs = dep->de_diroffset; 1962 /* defhp->defid_gen = dep->de_gen; */ 1963 return (0); 1964 } 1965 1966 /* Global vfs data structures for msdosfs */ 1967 struct vop_vector msdosfs_vnodeops = { 1968 .vop_default = &default_vnodeops, 1969 1970 .vop_access = msdosfs_access, 1971 .vop_bmap = msdosfs_bmap, 1972 .vop_cachedlookup = msdosfs_lookup, 1973 .vop_open = msdosfs_open, 1974 .vop_close = msdosfs_close, 1975 .vop_create = msdosfs_create, 1976 .vop_fsync = msdosfs_fsync, 1977 .vop_getattr = msdosfs_getattr, 1978 .vop_inactive = msdosfs_inactive, 1979 .vop_link = msdosfs_link, 1980 .vop_lookup = vfs_cache_lookup, 1981 .vop_mkdir = msdosfs_mkdir, 1982 .vop_mknod = msdosfs_mknod, 1983 .vop_pathconf = msdosfs_pathconf, 1984 .vop_print = msdosfs_print, 1985 .vop_read = msdosfs_read, 1986 .vop_readdir = msdosfs_readdir, 1987 .vop_reclaim = msdosfs_reclaim, 1988 .vop_remove = msdosfs_remove, 1989 .vop_rename = msdosfs_rename, 1990 .vop_rmdir = msdosfs_rmdir, 1991 .vop_setattr = msdosfs_setattr, 1992 .vop_strategy = msdosfs_strategy, 1993 .vop_symlink = msdosfs_symlink, 1994 .vop_write = msdosfs_write, 1995 .vop_vptofh = msdosfs_vptofh, 1996 }; 1997