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