1 /* $FreeBSD: src/sys/msdosfs/msdosfs_vnops.c,v 1.95.2.4 2003/06/13 15:05:47 trhodes Exp $ */ 2 /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vnops.c,v 1.54 2007/11/20 21:03:50 dillon Exp $ */ 3 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 4 5 /*- 6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 8 * All rights reserved. 9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by TooLs GmbH. 22 * 4. The name of TooLs GmbH may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 /* 37 * Written by Paul Popelka (paulp@uts.amdahl.com) 38 * 39 * You can do anything you want with this software, just don't say you wrote 40 * it, and don't remove this notice. 41 * 42 * This software is provided "as is". 43 * 44 * The author supplies this software to be publicly redistributed on the 45 * understanding that the author is not responsible for the correct 46 * functioning of this software in any circumstances and is not liable for 47 * any damages caused by this software. 48 * 49 * October 1992 50 */ 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 55 #include <sys/kernel.h> 56 #include <sys/stat.h> 57 #include <sys/buf.h> 58 #include <sys/proc.h> 59 #include <sys/priv.h> 60 #include <sys/namei.h> 61 #include <sys/mount.h> 62 #include <sys/unistd.h> 63 #include <sys/vnode.h> 64 #include <sys/malloc.h> 65 #include <sys/dirent.h> 66 #include <sys/signalvar.h> 67 68 #include <vm/vm.h> 69 #include <vm/vm_extern.h> 70 #include <vm/vm_zone.h> 71 #include <vm/vnode_pager.h> 72 73 #include <sys/buf2.h> 74 75 #include "bpb.h" 76 #include "direntry.h" 77 #include "denode.h" 78 #include "msdosfsmount.h" 79 #include "fat.h" 80 81 #define DOS_FILESIZE_MAX 0xffffffff 82 83 /* 84 * Prototypes for MSDOSFS vnode operations 85 */ 86 static int msdosfs_create (struct vop_old_create_args *); 87 static int msdosfs_mknod (struct vop_old_mknod_args *); 88 static int msdosfs_open (struct vop_open_args *); 89 static int msdosfs_close (struct vop_close_args *); 90 static int msdosfs_access (struct vop_access_args *); 91 static int msdosfs_getattr (struct vop_getattr_args *); 92 static int msdosfs_setattr (struct vop_setattr_args *); 93 static int msdosfs_read (struct vop_read_args *); 94 static int msdosfs_write (struct vop_write_args *); 95 static int msdosfs_fsync (struct vop_fsync_args *); 96 static int msdosfs_remove (struct vop_old_remove_args *); 97 static int msdosfs_link (struct vop_old_link_args *); 98 static int msdosfs_rename (struct vop_old_rename_args *); 99 static int msdosfs_mkdir (struct vop_old_mkdir_args *); 100 static int msdosfs_rmdir (struct vop_old_rmdir_args *); 101 static int msdosfs_symlink (struct vop_old_symlink_args *); 102 static int msdosfs_readdir (struct vop_readdir_args *); 103 static int msdosfs_bmap (struct vop_bmap_args *); 104 static int msdosfs_strategy (struct vop_strategy_args *); 105 static int msdosfs_print (struct vop_print_args *); 106 static int msdosfs_pathconf (struct vop_pathconf_args *ap); 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. 129 * 130 * msdosfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 131 * struct componentname *a_cnp, struct vattr *a_vap) 132 */ 133 static int 134 msdosfs_create(struct vop_old_create_args *ap) 135 { 136 struct componentname *cnp = ap->a_cnp; 137 struct denode ndirent; 138 struct denode *dep; 139 struct denode *pdep = VTODE(ap->a_dvp); 140 struct timespec ts; 141 int error; 142 143 #ifdef MSDOSFS_DEBUG 144 kprintf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 145 #endif 146 147 /* 148 * If this is the root directory and there is no space left we 149 * can't do anything. This is because the root directory can not 150 * change size. 151 */ 152 if (pdep->de_StartCluster == MSDOSFSROOT 153 && pdep->de_fndoffset >= pdep->de_FileSize) { 154 error = ENOSPC; 155 goto bad; 156 } 157 158 /* 159 * Create a directory entry for the file, then call createde() to 160 * have it installed. NOTE: DOS files are always executable. We 161 * use the absence of the owner write bit to make the file 162 * readonly. 163 */ 164 bzero(&ndirent, sizeof(ndirent)); 165 error = uniqdosname(pdep, cnp, ndirent.de_Name); 166 if (error) 167 goto bad; 168 169 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 170 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 171 ndirent.de_LowerCase = 0; 172 ndirent.de_StartCluster = 0; 173 ndirent.de_FileSize = 0; 174 ndirent.de_dev = pdep->de_dev; 175 ndirent.de_devvp = pdep->de_devvp; 176 ndirent.de_pmp = pdep->de_pmp; 177 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 178 getnanotime(&ts); 179 DETIMES(&ndirent, &ts, &ts, &ts); 180 error = createde(&ndirent, pdep, &dep, cnp); 181 if (error) 182 goto bad; 183 *ap->a_vpp = DETOV(dep); 184 return (0); 185 186 bad: 187 return (error); 188 } 189 190 /* 191 * msdosfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, 192 * struct componentname *a_cnp, struct vattr *a_vap) 193 */ 194 static int 195 msdosfs_mknod(struct vop_old_mknod_args *ap) 196 { 197 switch (ap->a_vap->va_type) { 198 case VDIR: 199 return (msdosfs_mkdir((struct vop_old_mkdir_args *)ap)); 200 break; 201 202 case VREG: 203 return (msdosfs_create((struct vop_old_create_args *)ap)); 204 break; 205 206 default: 207 return (EINVAL); 208 } 209 /* NOTREACHED */ 210 } 211 212 /* 213 * msdosfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 214 * struct file *a_fp) 215 */ 216 static int 217 msdosfs_open(struct vop_open_args *ap) 218 { 219 return(vop_stdopen(ap)); 220 } 221 222 /* 223 * msdosfs_close(struct vnode *a_vp, int a_fflag) 224 */ 225 static int 226 msdosfs_close(struct vop_close_args *ap) 227 { 228 struct vnode *vp = ap->a_vp; 229 struct denode *dep = VTODE(vp); 230 struct timespec ts; 231 232 if (vp->v_sysref.refcnt > 1) { 233 getnanotime(&ts); 234 DETIMES(dep, &ts, &ts, &ts); 235 } 236 return (vop_stdclose(ap)); 237 } 238 239 /* 240 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) 241 */ 242 static int 243 msdosfs_access(struct vop_access_args *ap) 244 { 245 struct vnode *vp = ap->a_vp; 246 struct denode *dep = VTODE(ap->a_vp); 247 struct msdosfsmount *pmp = dep->de_pmp; 248 struct ucred *cred = ap->a_cred; 249 mode_t mask, file_mode, mode = ap->a_mode; 250 gid_t *gp; 251 int i; 252 253 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 254 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 255 file_mode &= pmp->pm_mask; 256 257 /* 258 * Disallow write attempts on read-only file systems; 259 * unless the file is a socket, fifo, or a block or 260 * character device resident on the file system. 261 */ 262 if (mode & VWRITE) { 263 switch (vp->v_type) { 264 case VDIR: 265 case VLNK: 266 case VREG: 267 if (vp->v_mount->mnt_flag & MNT_RDONLY) 268 return (EROFS); 269 break; 270 default: 271 break; 272 } 273 } 274 275 /* User id 0 always gets access. */ 276 if (cred->cr_uid == 0) 277 return 0; 278 279 mask = 0; 280 281 /* Otherwise, check the owner. */ 282 if (cred->cr_uid == pmp->pm_uid) { 283 if (mode & VEXEC) 284 mask |= S_IXUSR; 285 if (mode & VREAD) 286 mask |= S_IRUSR; 287 if (mode & VWRITE) 288 mask |= S_IWUSR; 289 return (file_mode & mask) == mask ? 0 : EACCES; 290 } 291 292 /* Otherwise, check the groups. */ 293 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 294 if (pmp->pm_gid == *gp) { 295 if (mode & VEXEC) 296 mask |= S_IXGRP; 297 if (mode & VREAD) 298 mask |= S_IRGRP; 299 if (mode & VWRITE) 300 mask |= S_IWGRP; 301 return (file_mode & mask) == mask ? 0 : EACCES; 302 } 303 304 /* Otherwise, check everyone else. */ 305 if (mode & VEXEC) 306 mask |= S_IXOTH; 307 if (mode & VREAD) 308 mask |= S_IROTH; 309 if (mode & VWRITE) 310 mask |= S_IWOTH; 311 return (file_mode & mask) == mask ? 0 : EACCES; 312 } 313 314 /* 315 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap) 316 */ 317 static int 318 msdosfs_getattr(struct vop_getattr_args *ap) 319 { 320 struct denode *dep = VTODE(ap->a_vp); 321 struct msdosfsmount *pmp = dep->de_pmp; 322 struct vattr *vap = ap->a_vap; 323 mode_t mode; 324 struct timespec ts; 325 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 326 u_long fileid; 327 328 getnanotime(&ts); 329 DETIMES(dep, &ts, &ts, &ts); 330 vap->va_fsid = dev2udev(dep->de_dev); 331 /* 332 * The following computation of the fileid must be the same as that 333 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 334 * doesn't work. 335 */ 336 if (dep->de_Attributes & ATTR_DIRECTORY) { 337 fileid = xcntobn(pmp, dep->de_StartCluster) * dirsperblk; 338 if (dep->de_StartCluster == MSDOSFSROOT) 339 fileid = 1; 340 } else { 341 fileid = xcntobn(pmp, dep->de_dirclust) * dirsperblk; 342 if (dep->de_dirclust == MSDOSFSROOT) 343 fileid = roottobn(pmp, 0) * dirsperblk; 344 fileid += dep->de_diroffset / sizeof(struct direntry); 345 } 346 vap->va_fileid = fileid; 347 if ((dep->de_Attributes & ATTR_READONLY) == 0) 348 mode = S_IRWXU|S_IRWXG|S_IRWXO; 349 else 350 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 351 vap->va_mode = mode & pmp->pm_mask; 352 vap->va_uid = pmp->pm_uid; 353 vap->va_gid = pmp->pm_gid; 354 vap->va_nlink = 1; 355 vap->va_rmajor = VNOVAL; 356 vap->va_rminor = VNOVAL; 357 vap->va_size = dep->de_FileSize; 358 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 359 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 360 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 361 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 362 } else { 363 vap->va_atime = vap->va_mtime; 364 vap->va_ctime = vap->va_mtime; 365 } 366 vap->va_flags = 0; 367 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 368 vap->va_flags |= SF_ARCHIVED; 369 vap->va_gen = 0; 370 vap->va_blocksize = pmp->pm_bpcluster; 371 vap->va_bytes = 372 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 373 vap->va_type = ap->a_vp->v_type; 374 vap->va_filerev = dep->de_modrev; 375 return (0); 376 } 377 378 /* 379 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap, 380 * struct ucred *a_cred) 381 */ 382 static int 383 msdosfs_setattr(struct vop_setattr_args *ap) 384 { 385 struct vnode *vp = ap->a_vp; 386 struct denode *dep = VTODE(ap->a_vp); 387 struct msdosfsmount *pmp = dep->de_pmp; 388 struct vattr *vap = ap->a_vap; 389 struct ucred *cred = ap->a_cred; 390 int error = 0; 391 392 #ifdef MSDOSFS_DEBUG 393 kprintf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 394 ap->a_vp, vap, cred); 395 #endif 396 397 /* 398 * Check for unsettable attributes. 399 */ 400 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 401 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 402 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) || 403 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 404 #ifdef MSDOSFS_DEBUG 405 kprintf("msdosfs_setattr(): returning EINVAL\n"); 406 kprintf(" va_type %d, va_nlink %llx, va_fsid %x, va_fileid %llx\n", 407 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 408 kprintf(" va_blocksize %lx, va_rmajor %x, va_bytes %qx, va_gen %llx\n", 409 vap->va_blocksize, vap->va_rmajor, vap->va_bytes, vap->va_gen); 410 kprintf(" va_uid %x, va_gid %x\n", 411 vap->va_uid, vap->va_gid); 412 #endif 413 return (EINVAL); 414 } 415 if (vap->va_flags != VNOVAL) { 416 if (vp->v_mount->mnt_flag & MNT_RDONLY) 417 return (EROFS); 418 if (cred->cr_uid != pmp->pm_uid && 419 (error = priv_check_cred(cred, PRIV_ROOT, PRISON_ROOT))) 420 return (error); 421 /* 422 * We are very inconsistent about handling unsupported 423 * attributes. We ignored the access time and the 424 * read and execute bits. We were strict for the other 425 * attributes. 426 * 427 * Here we are strict, stricter than ufs in not allowing 428 * users to attempt to set SF_SETTABLE bits or anyone to 429 * set unsupported bits. However, we ignore attempts to 430 * set ATTR_ARCHIVE for directories `cp -pr' from a more 431 * sensible file system attempts it a lot. 432 */ 433 if (cred->cr_uid != 0) { 434 if (vap->va_flags & SF_SETTABLE) 435 return EPERM; 436 } 437 if (vap->va_flags & ~SF_ARCHIVED) 438 return EOPNOTSUPP; 439 if (vap->va_flags & SF_ARCHIVED) 440 dep->de_Attributes &= ~ATTR_ARCHIVE; 441 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 442 dep->de_Attributes |= ATTR_ARCHIVE; 443 dep->de_flag |= DE_MODIFIED; 444 } 445 446 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 447 uid_t uid; 448 gid_t gid; 449 450 if (vp->v_mount->mnt_flag & MNT_RDONLY) 451 return (EROFS); 452 uid = vap->va_uid; 453 if (uid == (uid_t)VNOVAL) 454 uid = pmp->pm_uid; 455 gid = vap->va_gid; 456 if (gid == (gid_t)VNOVAL) 457 gid = pmp->pm_gid; 458 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 459 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 460 (error = priv_check_cred(cred, PRIV_ROOT, PRISON_ROOT))) 461 return error; 462 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 463 return EINVAL; 464 } 465 466 if (vap->va_size != VNOVAL) { 467 /* 468 * Disallow write attempts on read-only file systems; 469 * unless the file is a socket, fifo, or a block or 470 * character device resident on the file system. 471 */ 472 switch (vp->v_type) { 473 case VDIR: 474 return (EISDIR); 475 /* NOT REACHED */ 476 case VLNK: 477 case VREG: 478 if (vp->v_mount->mnt_flag & MNT_RDONLY) 479 return (EROFS); 480 break; 481 default: 482 break; 483 } 484 error = detrunc(dep, vap->va_size, 0); 485 if (error) 486 return error; 487 } 488 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 489 if (vp->v_mount->mnt_flag & MNT_RDONLY) 490 return (EROFS); 491 if (cred->cr_uid != pmp->pm_uid && 492 (error = priv_check_cred(cred, PRIV_ROOT, PRISON_ROOT)) && 493 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 494 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred)))) 495 return (error); 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 unix2dostime(&vap->va_atime, &dep->de_ADate, 501 NULL, NULL); 502 } 503 if (vap->va_mtime.tv_sec != VNOVAL) { 504 dep->de_flag &= ~DE_UPDATE; 505 unix2dostime(&vap->va_mtime, &dep->de_MDate, 506 &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_ROOT, PRISON_ROOT))) 522 return (error); 523 if (vp->v_type != VDIR) { 524 /* We ignore the read and execute bits. */ 525 if (vap->va_mode & VWRITE) 526 dep->de_Attributes &= ~ATTR_READONLY; 527 else 528 dep->de_Attributes |= ATTR_READONLY; 529 dep->de_Attributes |= ATTR_ARCHIVE; 530 dep->de_flag |= DE_MODIFIED; 531 } 532 } 533 return (deupdat(dep, 1)); 534 } 535 536 /* 537 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 538 * struct ucred *a_cred) 539 */ 540 static int 541 msdosfs_read(struct vop_read_args *ap) 542 { 543 int error = 0; 544 int blsize; 545 int isadir; 546 int orig_resid; 547 u_int n; 548 u_long diff; 549 u_long on; 550 daddr_t lbn; 551 daddr_t rablock; 552 off_t raoffset; 553 off_t loffset; 554 int rasize; 555 int seqcount; 556 struct buf *bp; 557 struct vnode *vp = ap->a_vp; 558 struct denode *dep = VTODE(vp); 559 struct msdosfsmount *pmp = dep->de_pmp; 560 struct uio *uio = ap->a_uio; 561 562 if (uio->uio_offset < 0) 563 return (EINVAL); 564 565 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 566 return (0); 567 /* 568 * If they didn't ask for any data, then we are done. 569 */ 570 orig_resid = uio->uio_resid; 571 if (orig_resid <= 0) 572 return (0); 573 574 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 575 576 isadir = dep->de_Attributes & ATTR_DIRECTORY; 577 do { 578 if (uio->uio_offset >= dep->de_FileSize) 579 break; 580 581 /* 582 * note: lbn is a cluster number, not a device block number. 583 */ 584 lbn = de_off2cn(pmp, uio->uio_offset); 585 loffset = de_cn2doff(pmp, lbn); 586 587 /* 588 * If we are operating on a directory file then be sure to 589 * do i/o with the vnode for the filesystem instead of the 590 * vnode for the directory. 591 */ 592 if (isadir) { 593 /* 594 * convert cluster # to block #. lbn is a 595 * device block number after this. 596 */ 597 error = pcbmap(dep, lbn, &lbn, NULL, &blsize); 598 loffset = de_bntodoff(pmp, lbn); 599 if (error == E2BIG) { 600 error = EINVAL; 601 break; 602 } else if (error) 603 break; 604 error = bread(pmp->pm_devvp, loffset, blsize, &bp); 605 } else { 606 blsize = pmp->pm_bpcluster; 607 rablock = lbn + 1; 608 raoffset = de_cn2doff(pmp, rablock); 609 if (seqcount > 1 && 610 raoffset < dep->de_FileSize) { 611 rasize = pmp->pm_bpcluster; 612 error = breadn(vp, loffset, blsize, 613 &raoffset, &rasize, 1, &bp); 614 } else { 615 error = bread(vp, loffset, blsize, &bp); 616 } 617 } 618 if (error) { 619 brelse(bp); 620 break; 621 } 622 on = uio->uio_offset & pmp->pm_crbomask; 623 diff = pmp->pm_bpcluster - on; 624 n = diff > uio->uio_resid ? uio->uio_resid : diff; 625 diff = dep->de_FileSize - uio->uio_offset; 626 if (diff < n) 627 n = diff; 628 diff = blsize - bp->b_resid; 629 if (diff < n) 630 n = diff; 631 error = uiomove(bp->b_data + on, (int) n, uio); 632 brelse(bp); 633 } while (error == 0 && uio->uio_resid > 0 && n != 0); 634 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 635 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 636 dep->de_flag |= DE_ACCESS; 637 return (error); 638 } 639 640 /* 641 * Write data to a file or directory. 642 * 643 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 644 * struct ucred *a_cred) 645 */ 646 static int 647 msdosfs_write(struct vop_write_args *ap) 648 { 649 int n; 650 int croffset; 651 int resid; 652 u_long osize; 653 int error = 0; 654 u_long count; 655 daddr_t cn, 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 proc *p = (td ? td->td_proc : NULL); 665 struct lwp *lp = (td ? td->td_lwp : NULL); 666 667 #ifdef MSDOSFS_DEBUG 668 kprintf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 669 vp, uio, ioflag, ap->a_cred); 670 kprintf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 671 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 672 #endif 673 674 switch (vp->v_type) { 675 case VREG: 676 if (ioflag & IO_APPEND) 677 uio->uio_offset = dep->de_FileSize; 678 thisvp = vp; 679 break; 680 case VDIR: 681 return EISDIR; 682 default: 683 panic("msdosfs_write(): bad file type"); 684 } 685 686 if (uio->uio_offset < 0) 687 return (EFBIG); 688 689 if (uio->uio_resid == 0) 690 return (0); 691 692 /* 693 * If they've exceeded their filesize limit, tell them about it. 694 */ 695 if (p && 696 ((uoff_t)uio->uio_offset + uio->uio_resid > 697 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 698 lwpsignal(p, lp, SIGXFSZ); 699 return (EFBIG); 700 } 701 702 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 703 return (EFBIG); 704 705 /* 706 * If the offset we are starting the write at is beyond the end of 707 * the file, then they've done a seek. Unix filesystems allow 708 * files with holes in them, DOS doesn't so we must fill the hole 709 * with zeroed blocks. 710 */ 711 if (uio->uio_offset > dep->de_FileSize) { 712 error = deextend(dep, uio->uio_offset); 713 if (error) 714 return (error); 715 } 716 717 /* 718 * Remember some values in case the write fails. 719 */ 720 resid = uio->uio_resid; 721 osize = dep->de_FileSize; 722 723 /* 724 * If we write beyond the end of the file, extend it to its ultimate 725 * size ahead of the time to hopefully get a contiguous area. 726 */ 727 if (uio->uio_offset + resid > osize) { 728 count = de_clcount(pmp, uio->uio_offset + resid) - 729 de_clcount(pmp, osize); 730 error = extendfile(dep, count, NULL, NULL, 0); 731 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 732 goto errexit; 733 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 734 } else 735 lastcn = de_clcount(pmp, osize) - 1; 736 737 do { 738 if (de_off2cn(pmp, uio->uio_offset) > lastcn) { 739 error = ENOSPC; 740 break; 741 } 742 743 croffset = uio->uio_offset & pmp->pm_crbomask; 744 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 745 if (uio->uio_offset + n > dep->de_FileSize) { 746 dep->de_FileSize = uio->uio_offset + n; 747 /* The object size needs to be set before buffer is allocated */ 748 vnode_pager_setsize(vp, dep->de_FileSize); 749 } 750 751 /* 752 * If either the whole cluster gets written, or we write 753 * the cluster from its start beyond EOF, then no need to 754 * read data from disk. 755 * 756 * If UIO_NOCOPY is set we have to do a read-before-write 757 * to fill in any missing pieces of the buffer since no 758 * actual overwrite will occur. 759 */ 760 cn = de_off2cn(pmp, uio->uio_offset); 761 if ((uio->uio_offset & pmp->pm_crbomask) == 0 762 && uio->uio_segflg != UIO_NOCOPY 763 && (de_off2cn(pmp, uio->uio_offset + uio->uio_resid) 764 > de_off2cn(pmp, uio->uio_offset) 765 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 766 bp = getblk(thisvp, de_cn2doff(pmp, cn), 767 pmp->pm_bpcluster, 0, 0); 768 clrbuf(bp); 769 /* 770 * Do the bmap now, since pcbmap needs buffers 771 * for the fat table. (see msdosfs_strategy) 772 */ 773 if (bp->b_bio2.bio_offset == NOOFFSET) { 774 daddr_t lblkno = de_off2cn(pmp, bp->b_loffset); 775 daddr_t dblkno; 776 777 error = pcbmap(dep, lblkno, 778 &dblkno, NULL, NULL); 779 if (error || dblkno == (daddr_t)-1) { 780 bp->b_bio2.bio_offset = NOOFFSET; 781 } else { 782 bp->b_bio2.bio_offset = de_bntodoff(pmp, dblkno); 783 } 784 } 785 if (bp->b_bio2.bio_offset == NOOFFSET) { 786 brelse(bp); 787 if (!error) 788 error = EIO; /* XXX */ 789 break; 790 } 791 } else { 792 /* 793 * The block we need to write into exists, so read 794 * it in. 795 */ 796 error = bread(thisvp, de_cn2doff(pmp, cn), 797 pmp->pm_bpcluster, &bp); 798 if (error) { 799 brelse(bp); 800 break; 801 } 802 } 803 804 /* 805 * Should these vnode_pager_* functions be done on dir 806 * files? 807 */ 808 809 /* 810 * Copy the data from user space into the buf header. 811 */ 812 error = uiomove(bp->b_data + croffset, n, uio); 813 if (error) { 814 brelse(bp); 815 break; 816 } 817 818 /* 819 * If they want this synchronous then write it and wait for 820 * it. Otherwise, if on a cluster boundary write it 821 * asynchronously so we can move on to the next block 822 * without delay. Otherwise do a delayed write because we 823 * may want to write somemore into the block later. 824 */ 825 if (ioflag & IO_SYNC) 826 bwrite(bp); 827 else if (n + croffset == pmp->pm_bpcluster) 828 bawrite(bp); 829 else 830 bdwrite(bp); 831 dep->de_flag |= DE_UPDATE; 832 } while (error == 0 && uio->uio_resid > 0); 833 834 /* 835 * If the write failed and they want us to, truncate the file back 836 * to the size it was before the write was attempted. 837 */ 838 errexit: 839 if (error) { 840 if (ioflag & IO_UNIT) { 841 detrunc(dep, osize, ioflag & IO_SYNC); 842 uio->uio_offset -= resid - uio->uio_resid; 843 uio->uio_resid = resid; 844 } else { 845 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC); 846 if (uio->uio_resid != resid) 847 error = 0; 848 } 849 } else if (ioflag & IO_SYNC) 850 error = deupdat(dep, 1); 851 return (error); 852 } 853 854 /* 855 * Flush the blocks of a file to disk. 856 * 857 * This function is worthless for vnodes that represent directories. Maybe we 858 * could just do a sync if they try an fsync on a directory file. 859 * 860 * msdosfs_fsync(struct vnode *a_vp, int a_waitfor) 861 */ 862 static int 863 msdosfs_fsync(struct vop_fsync_args *ap) 864 { 865 struct vnode *vp = ap->a_vp; 866 867 /* 868 * Flush all dirty buffers associated with a vnode. 869 */ 870 #ifdef DIAGNOSTIC 871 loop: 872 #endif 873 vfsync(vp, ap->a_waitfor, 0, NULL, NULL); 874 #ifdef DIAGNOSTIC 875 if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) { 876 vprint("msdosfs_fsync: dirty", vp); 877 goto loop; 878 } 879 #endif 880 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 881 } 882 883 /* 884 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 885 * struct componentname *a_cnp) 886 */ 887 static int 888 msdosfs_remove(struct vop_old_remove_args *ap) 889 { 890 struct denode *dep = VTODE(ap->a_vp); 891 struct denode *ddep = VTODE(ap->a_dvp); 892 int error; 893 894 if (ap->a_vp->v_type == VDIR) 895 error = EPERM; 896 else 897 error = removede(ddep, dep); 898 #ifdef MSDOSFS_DEBUG 899 kprintf("msdosfs_remove(), dep %p, v_sysrefs %d\n", 900 dep, ap->a_vp->v_sysref.refcnt); 901 #endif 902 return (error); 903 } 904 905 /* 906 * DOS filesystems don't know what links are. But since we already called 907 * msdosfs_lookup() with create and lockparent, the parent is locked so we 908 * have to free it before we return the error. 909 * 910 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 911 * struct componentname *a_cnp) 912 */ 913 static int 914 msdosfs_link(struct vop_old_link_args *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 * Notes: 966 * I'm not sure how the memory containing the pathnames pointed at by the 967 * componentname structures is freed, there may be some memory bleeding 968 * for each rename done. 969 * 970 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 971 * struct componentname *a_fcnp, struct vnode *a_tdvp, 972 * struct vnode *a_tvp, struct componentname *a_tcnp) 973 */ 974 static int 975 msdosfs_rename(struct vop_old_rename_args *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[11], 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 msdosfsmount *pmp; 992 struct direntry *dotdotp; 993 struct buf *bp; 994 995 pmp = VFSTOMSDOSFS(fdvp->v_mount); 996 997 /* 998 * Check for cross-device rename. 999 */ 1000 if ((fvp->v_mount != tdvp->v_mount) || 1001 (tvp && (fvp->v_mount != tvp->v_mount))) { 1002 error = EXDEV; 1003 abortit: 1004 if (tdvp == tvp) 1005 vrele(tdvp); 1006 else 1007 vput(tdvp); 1008 if (tvp) 1009 vput(tvp); 1010 vrele(fdvp); 1011 vrele(fvp); 1012 return (error); 1013 } 1014 1015 /* 1016 * If source and dest are the same, do nothing. 1017 */ 1018 if (tvp == fvp) { 1019 error = 0; 1020 goto abortit; 1021 } 1022 1023 /* 1024 * fvp, fdvp are unlocked, tvp, tdvp are locked. Lock fvp and note 1025 * that we have to unlock it to use the abortit target. 1026 */ 1027 error = vn_lock(fvp, LK_EXCLUSIVE); 1028 if (error) 1029 goto abortit; 1030 dp = VTODE(fdvp); 1031 ip = VTODE(fvp); 1032 1033 /* 1034 * Be sure we are not renaming ".", "..", or an alias of ".". This 1035 * leads to a crippled directory tree. It's pretty tough to do a 1036 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1037 * doesn't work if the ".." entry is missing. 1038 */ 1039 if (ip->de_Attributes & ATTR_DIRECTORY) { 1040 /* 1041 * Avoid ".", "..", and aliases of "." for obvious reasons. 1042 */ 1043 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1044 dp == ip || 1045 (fcnp->cn_flags & CNP_ISDOTDOT) || 1046 (tcnp->cn_flags & CNP_ISDOTDOT) || 1047 (ip->de_flag & DE_RENAME)) { 1048 vn_unlock(fvp); 1049 error = EINVAL; 1050 goto abortit; 1051 } 1052 ip->de_flag |= DE_RENAME; 1053 doingdirectory++; 1054 } 1055 1056 /* 1057 * fvp locked, fdvp unlocked, tvp, tdvp locked. DE_RENAME only 1058 * set if doingdirectory. We will get fvp unlocked in fairly 1059 * short order. dp and xp must be setup and fvp must be unlocked 1060 * for the out and bad targets to work properly. 1061 */ 1062 dp = VTODE(tdvp); 1063 xp = tvp ? VTODE(tvp) : NULL; 1064 1065 /* 1066 * Remember direntry place to use for destination 1067 */ 1068 to_diroffset = dp->de_fndoffset; 1069 to_count = dp->de_fndcnt; 1070 1071 /* 1072 * If ".." must be changed (ie the directory gets a new 1073 * parent) then the source directory must not be in the 1074 * directory heirarchy above the target, as this would 1075 * orphan everything below the source directory. Also 1076 * the user must have write permission in the source so 1077 * as to be able to change "..". We must repeat the call 1078 * to namei, as the parent directory is unlocked by the 1079 * call to doscheckpath(). 1080 */ 1081 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 1082 vn_unlock(fvp); 1083 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1084 newparent = 1; 1085 1086 /* 1087 * ok. fvp, fdvp unlocked, tvp, tdvp locked. tvp may be NULL. 1088 * DE_RENAME only set if doingdirectory. 1089 */ 1090 if (doingdirectory && newparent) { 1091 if (error) /* write access check above */ 1092 goto bad; 1093 if (xp != NULL) { 1094 vput(tvp); 1095 xp = NULL; 1096 } 1097 /* 1098 * checkpath vput's tdvp (VTOI(dp)) on return no matter what, 1099 * get an extra ref so we wind up with just an unlocked, ref'd 1100 * tdvp. The 'out' target skips tvp and tdvp cleanups (tdvp 1101 * isn't locked so we can't use the out target). 1102 */ 1103 vref(tdvp); 1104 error = doscheckpath(ip, dp); 1105 tcnp->cn_flags |= CNP_PDIRUNLOCK; 1106 if (error) { 1107 vrele(tdvp); 1108 goto out; 1109 } 1110 /* 1111 * relookup no longer messes with the ref count. tdvp must 1112 * be unlocked on entry and on success will be locked on 1113 * return. 1114 */ 1115 error = relookup(tdvp, &tvp, tcnp); 1116 if (error) { 1117 if (tcnp->cn_flags & CNP_PDIRUNLOCK) 1118 vrele(tdvp); 1119 else 1120 vput(tdvp); 1121 goto out; 1122 } 1123 1124 /* 1125 * tvp and tdvp are now locked again. 1126 */ 1127 dp = VTODE(tdvp); 1128 xp = tvp ? VTODE(tvp) : NULL; 1129 } 1130 1131 /* 1132 * tvp and tdvp are now locked again, the 'bad' target can be used 1133 * to clean them up again. Delete an existant target and clean 1134 * up tvp. Set xp to NULL to indicate that tvp has been cleaned up. 1135 */ 1136 if (xp != NULL) { 1137 /* 1138 * Target must be empty if a directory and have no links 1139 * to it. Also, ensure source and target are compatible 1140 * (both directories, or both not directories). 1141 */ 1142 if (xp->de_Attributes & ATTR_DIRECTORY) { 1143 if (!dosdirempty(xp)) { 1144 error = ENOTEMPTY; 1145 goto bad; 1146 } 1147 if (!doingdirectory) { 1148 error = ENOTDIR; 1149 goto bad; 1150 } 1151 } else if (doingdirectory) { 1152 error = EISDIR; 1153 goto bad; 1154 } 1155 error = removede(dp, xp); 1156 if (error) 1157 goto bad; 1158 vput(tvp); 1159 xp = NULL; 1160 tvp = NULL; 1161 } 1162 1163 /* 1164 * Convert the filename in tcnp into a dos filename. We copy this 1165 * into the denode and directory entry for the destination 1166 * file/directory. 1167 */ 1168 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1169 if (error) 1170 goto bad; 1171 1172 /* 1173 * Since from wasn't locked at various places above, we have to do 1174 * a relookup here. If the target and source are the same directory 1175 * we have to unlock the target directory in order to safely relookup 1176 * the source, because relookup expects its directory to be unlocked. 1177 * 1178 * Note that ap->a_fvp is still valid and ref'd. Any cleanup must 1179 * now take that into account. 1180 * 1181 * The tdvp locking issues make this a real mess. 1182 */ 1183 fcnp->cn_flags &= ~CNP_MODMASK; 1184 fcnp->cn_flags |= CNP_LOCKPARENT; 1185 if (newparent == 0) 1186 vn_unlock(tdvp); 1187 error = relookup(fdvp, &fvp, fcnp); 1188 if (error || fvp == NULL) { 1189 /* 1190 * From name has disappeared. Note: fdvp might == tdvp. 1191 * 1192 * DE_RENAME is only set if doingdirectory. 1193 */ 1194 if (doingdirectory) 1195 panic("rename: lost dir entry"); 1196 if (fcnp->cn_flags & CNP_PDIRUNLOCK) 1197 vrele(fdvp); 1198 else 1199 vput(fdvp); 1200 if (newparent == 0) 1201 vrele(tdvp); 1202 else 1203 vput(tdvp); 1204 vrele(ap->a_fvp); 1205 return(0); 1206 } 1207 1208 /* 1209 * No error occured. tdvp, fdvp and fvp are all locked. If 1210 * newparent was 0 be aware that fdvp == tdvp. tvp has been cleaned 1211 * up. ap->a_fvp is still refd. 1212 */ 1213 xp = VTODE(fvp); 1214 zp = VTODE(fdvp); 1215 from_diroffset = zp->de_fndoffset; 1216 1217 /* 1218 * Ensure that the directory entry still exists and has not 1219 * changed till now. If the source is a file the entry may 1220 * have been unlinked or renamed. In either case there is 1221 * no further work to be done. If the source is a directory 1222 * then it cannot have been rmdir'ed or renamed; this is 1223 * prohibited by the DE_RENAME flag. 1224 * 1225 * DE_RENAME is only set if doingdirectory. 1226 */ 1227 if (xp != ip) { 1228 if (doingdirectory) 1229 panic("rename: lost dir entry"); 1230 goto done; 1231 } else { 1232 u_long new_dirclust; 1233 u_long new_diroffset; 1234 1235 /* 1236 * First write a new entry in the destination 1237 * directory and mark the entry in the source directory 1238 * as deleted. Then move the denode to the correct hash 1239 * chain for its new location in the filesystem. And, if 1240 * we moved a directory, then update its .. entry to point 1241 * to the new parent directory. 1242 */ 1243 bcopy(ip->de_Name, oldname, 11); 1244 bcopy(toname, ip->de_Name, 11); /* update denode */ 1245 dp->de_fndoffset = to_diroffset; 1246 dp->de_fndcnt = to_count; 1247 error = createde(ip, dp, (struct denode **)0, tcnp); 1248 if (error) { 1249 bcopy(oldname, ip->de_Name, 11); 1250 goto done; 1251 } 1252 ip->de_refcnt++; 1253 zp->de_fndoffset = from_diroffset; 1254 error = removede(zp, ip); 1255 if (error) { 1256 /* XXX should really panic here, fs is corrupt */ 1257 goto done; 1258 } 1259 if (!doingdirectory) { 1260 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 1261 NULL, &new_dirclust, NULL); 1262 if (error) { 1263 /* XXX should really panic here, fs is corrupt */ 1264 goto done; 1265 } 1266 if (new_dirclust == MSDOSFSROOT) 1267 new_diroffset = to_diroffset; 1268 else 1269 new_diroffset = to_diroffset & pmp->pm_crbomask; 1270 msdosfs_reinsert(ip, new_dirclust, new_diroffset); 1271 } 1272 } 1273 1274 /* 1275 * If we moved a directory to a new parent directory, then we must 1276 * fixup the ".." entry in the moved directory. 1277 */ 1278 if (doingdirectory && newparent) { 1279 cn = ip->de_StartCluster; 1280 if (cn == MSDOSFSROOT) { 1281 /* this should never happen */ 1282 panic("msdosfs_rename(): updating .. in root directory?"); 1283 } else { 1284 bn = xcntobn(pmp, cn); 1285 } 1286 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), pmp->pm_bpcluster, &bp); 1287 if (error) { 1288 /* XXX should really panic here, fs is corrupt */ 1289 brelse(bp); 1290 goto done; 1291 } 1292 dotdotp = (struct direntry *)bp->b_data + 1; 1293 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1294 if (FAT32(pmp)) 1295 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1296 error = bwrite(bp); 1297 if (error) { 1298 /* XXX should really panic here, fs is corrupt */ 1299 goto done; 1300 } 1301 } 1302 1303 /* 1304 * done case fvp, fdvp, tdvp are locked. ap->a_fvp is refd 1305 */ 1306 done: 1307 if (doingdirectory) 1308 ip->de_flag &= ~DE_RENAME; /* XXX fvp not locked */ 1309 vput(fvp); 1310 if (newparent) 1311 vput(fdvp); 1312 else 1313 vrele(fdvp); 1314 vput(tdvp); 1315 vrele(ap->a_fvp); 1316 return (error); 1317 1318 /* 1319 * 'bad' target: xp governs tvp. tvp and tdvp arel ocked, fdvp and fvp 1320 * are not locked. ip points to fvp's inode which may have DE_RENAME 1321 * set. 1322 */ 1323 bad: 1324 if (xp) 1325 vput(tvp); 1326 vput(tdvp); 1327 out: 1328 /* 1329 * 'out' target: tvp and tdvp have already been cleaned up. 1330 */ 1331 if (doingdirectory) 1332 ip->de_flag &= ~DE_RENAME; 1333 vrele(fdvp); 1334 vrele(fvp); 1335 return (error); 1336 1337 } 1338 1339 static struct { 1340 struct direntry dot; 1341 struct direntry dotdot; 1342 } dosdirtemplate = { 1343 { ". ", " ", /* the . entry */ 1344 ATTR_DIRECTORY, /* file attribute */ 1345 0, /* reserved */ 1346 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1347 { 0, 0 }, /* access date */ 1348 { 0, 0 }, /* high bits of start cluster */ 1349 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1350 { 0, 0 }, /* startcluster */ 1351 { 0, 0, 0, 0 } /* filesize */ 1352 }, 1353 { ".. ", " ", /* the .. entry */ 1354 ATTR_DIRECTORY, /* file attribute */ 1355 0, /* reserved */ 1356 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1357 { 0, 0 }, /* access date */ 1358 { 0, 0 }, /* high bits of start cluster */ 1359 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1360 { 0, 0 }, /* startcluster */ 1361 { 0, 0, 0, 0 } /* filesize */ 1362 } 1363 }; 1364 1365 /* 1366 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 1367 * struct componentname *a_cnp, struct vattr *a_vap) 1368 */ 1369 static int 1370 msdosfs_mkdir(struct vop_old_mkdir_args *ap) 1371 { 1372 struct componentname *cnp = ap->a_cnp; 1373 struct denode *dep; 1374 struct denode *pdep = VTODE(ap->a_dvp); 1375 struct direntry *denp; 1376 struct msdosfsmount *pmp = pdep->de_pmp; 1377 struct buf *bp; 1378 u_long newcluster, pcl; 1379 int bn; 1380 int error; 1381 struct denode ndirent; 1382 struct timespec ts; 1383 1384 /* 1385 * If this is the root directory and there is no space left we 1386 * can't do anything. This is because the root directory can not 1387 * change size. 1388 */ 1389 if (pdep->de_StartCluster == MSDOSFSROOT 1390 && pdep->de_fndoffset >= pdep->de_FileSize) { 1391 error = ENOSPC; 1392 goto bad2; 1393 } 1394 1395 /* 1396 * Allocate a cluster to hold the about to be created directory. 1397 */ 1398 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1399 if (error) 1400 goto bad2; 1401 1402 bzero(&ndirent, sizeof(ndirent)); 1403 ndirent.de_pmp = pmp; 1404 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1405 getnanotime(&ts); 1406 DETIMES(&ndirent, &ts, &ts, &ts); 1407 1408 /* 1409 * Now fill the cluster with the "." and ".." entries. And write 1410 * the cluster to disk. This way it is there for the parent 1411 * directory to be pointing at if there were a crash. 1412 */ 1413 bn = xcntobn(pmp, newcluster); 1414 /* always succeeds */ 1415 bp = getblk(pmp->pm_devvp, de_bntodoff(pmp, bn), 1416 pmp->pm_bpcluster, 0, 0); 1417 bzero(bp->b_data, pmp->pm_bpcluster); 1418 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1419 denp = (struct direntry *)bp->b_data; 1420 putushort(denp[0].deStartCluster, newcluster); 1421 putushort(denp[0].deCDate, ndirent.de_CDate); 1422 putushort(denp[0].deCTime, ndirent.de_CTime); 1423 denp[0].deCHundredth = ndirent.de_CHun; 1424 putushort(denp[0].deADate, ndirent.de_ADate); 1425 putushort(denp[0].deMDate, ndirent.de_MDate); 1426 putushort(denp[0].deMTime, ndirent.de_MTime); 1427 pcl = pdep->de_StartCluster; 1428 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1429 pcl = 0; 1430 putushort(denp[1].deStartCluster, pcl); 1431 putushort(denp[1].deCDate, ndirent.de_CDate); 1432 putushort(denp[1].deCTime, ndirent.de_CTime); 1433 denp[1].deCHundredth = ndirent.de_CHun; 1434 putushort(denp[1].deADate, ndirent.de_ADate); 1435 putushort(denp[1].deMDate, ndirent.de_MDate); 1436 putushort(denp[1].deMTime, ndirent.de_MTime); 1437 if (FAT32(pmp)) { 1438 putushort(denp[0].deHighClust, newcluster >> 16); 1439 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1440 } 1441 1442 error = bwrite(bp); 1443 if (error) 1444 goto bad; 1445 1446 /* 1447 * Now build up a directory entry pointing to the newly allocated 1448 * cluster. This will be written to an empty slot in the parent 1449 * directory. 1450 */ 1451 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1452 if (error) 1453 goto bad; 1454 1455 ndirent.de_Attributes = ATTR_DIRECTORY; 1456 ndirent.de_LowerCase = 0; 1457 ndirent.de_StartCluster = newcluster; 1458 ndirent.de_FileSize = 0; 1459 ndirent.de_dev = pdep->de_dev; 1460 ndirent.de_devvp = pdep->de_devvp; 1461 error = createde(&ndirent, pdep, &dep, cnp); 1462 if (error) 1463 goto bad; 1464 *ap->a_vpp = DETOV(dep); 1465 return (0); 1466 1467 bad: 1468 clusterfree(pmp, newcluster, NULL); 1469 bad2: 1470 return (error); 1471 } 1472 1473 /* 1474 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 1475 * struct componentname *a_cnp) 1476 */ 1477 static int 1478 msdosfs_rmdir(struct vop_old_rmdir_args *ap) 1479 { 1480 struct vnode *vp = ap->a_vp; 1481 struct vnode *dvp = ap->a_dvp; 1482 struct denode *ip, *dp; 1483 int error; 1484 1485 ip = VTODE(vp); 1486 dp = VTODE(dvp); 1487 1488 /* 1489 * Verify the directory is empty (and valid). 1490 * (Rmdir ".." won't be valid since 1491 * ".." will contain a reference to 1492 * the current directory and thus be 1493 * non-empty.) 1494 */ 1495 error = 0; 1496 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1497 error = ENOTEMPTY; 1498 goto out; 1499 } 1500 /* 1501 * Delete the entry from the directory. For dos filesystems this 1502 * gets rid of the directory entry on disk, the in memory copy 1503 * still exists but the de_refcnt is <= 0. This prevents it from 1504 * being found by deget(). When the vput() on dep is done we give 1505 * up access and eventually msdosfs_reclaim() will be called which 1506 * will remove it from the denode cache. 1507 */ 1508 error = removede(dp, ip); 1509 if (error) 1510 goto out; 1511 /* 1512 * This is where we decrement the link count in the parent 1513 * directory. Since dos filesystems don't do this we just purge 1514 * the name cache. 1515 */ 1516 vn_unlock(dvp); 1517 /* 1518 * Truncate the directory that is being deleted. 1519 */ 1520 error = detrunc(ip, (u_long)0, IO_SYNC); 1521 1522 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1523 out: 1524 return (error); 1525 } 1526 1527 /* 1528 * DOS filesystems don't know what symlinks are. 1529 * 1530 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 1531 * struct componentname *a_cnp, struct vattr *a_vap, 1532 * char *a_target) 1533 */ 1534 static int 1535 msdosfs_symlink(struct vop_old_symlink_args *ap) 1536 { 1537 return (EOPNOTSUPP); 1538 } 1539 1540 /* 1541 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio, 1542 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies, 1543 * off_t **a_cookies) 1544 */ 1545 static int 1546 msdosfs_readdir(struct vop_readdir_args *ap) 1547 { 1548 int error = 0; 1549 int diff; 1550 long n; 1551 int blsize; 1552 long on; 1553 u_long cn; 1554 u_long dirsperblk; 1555 long bias = 0; 1556 daddr_t bn, lbn; 1557 struct buf *bp; 1558 struct denode *dep; 1559 struct msdosfsmount *pmp; 1560 struct direntry *dentp; 1561 struct uio *uio = ap->a_uio; 1562 off_t *cookies = NULL; 1563 int ncookies = 0; 1564 off_t offset, off; 1565 int chksum = -1; 1566 ino_t d_ino; 1567 uint16_t d_namlen; 1568 uint8_t d_type; 1569 char *d_name_storage = NULL; 1570 char *d_name; 1571 1572 if ((error = vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 1573 return (error); 1574 1575 dep = VTODE(ap->a_vp); 1576 pmp = dep->de_pmp; 1577 1578 #ifdef MSDOSFS_DEBUG 1579 kprintf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1580 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1581 #endif 1582 1583 /* 1584 * msdosfs_readdir() won't operate properly on regular files since 1585 * it does i/o only with the the filesystem vnode, and hence can 1586 * retrieve the wrong block from the buffer cache for a plain file. 1587 * So, fail attempts to readdir() on a plain file. 1588 */ 1589 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) { 1590 error = ENOTDIR; 1591 goto done; 1592 } 1593 1594 /* 1595 * If the user buffer is smaller than the size of one dos directory 1596 * entry or the file offset is not a multiple of the size of a 1597 * directory entry, then we fail the read. 1598 */ 1599 off = offset = uio->uio_offset; 1600 if (uio->uio_resid < sizeof(struct direntry) || 1601 (offset & (sizeof(struct direntry) - 1))) { 1602 error = EINVAL; 1603 goto done; 1604 } 1605 1606 if (ap->a_ncookies) { 1607 ncookies = uio->uio_resid / 16 + 1; 1608 if (ncookies > 1024) 1609 ncookies = 1024; 1610 MALLOC(cookies, off_t *, ncookies * sizeof(off_t), M_TEMP, 1611 M_WAITOK); 1612 *ap->a_cookies = cookies; 1613 *ap->a_ncookies = ncookies; 1614 } 1615 1616 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1617 1618 /* 1619 * If they are reading from the root directory then, we simulate 1620 * the . and .. entries since these don't exist in the root 1621 * directory. We also set the offset bias to make up for having to 1622 * simulate these entries. By this I mean that at file offset 64 we 1623 * read the first entry in the root directory that lives on disk. 1624 */ 1625 if (dep->de_StartCluster == MSDOSFSROOT 1626 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1627 #if 0 1628 kprintf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1629 offset); 1630 #endif 1631 bias = 2 * sizeof(struct direntry); 1632 if (offset < bias) { 1633 for (n = (int)offset / sizeof(struct direntry); n < 2; 1634 n++) { 1635 if (FAT32(pmp)) 1636 d_ino = xcntobn(pmp, pmp->pm_rootdirblk) 1637 * dirsperblk; 1638 else 1639 d_ino = 1; 1640 d_type = DT_DIR; 1641 if (n == 0) { 1642 d_namlen = 1; 1643 d_name = "."; 1644 } else /* if (n == 1) */{ 1645 d_namlen = 2; 1646 d_name = ".."; 1647 } 1648 if (vop_write_dirent(&error, uio, d_ino, d_type, 1649 d_namlen, d_name)) 1650 goto out; 1651 if (error) 1652 goto out; 1653 offset += sizeof(struct direntry); 1654 off = offset; 1655 if (cookies) { 1656 *cookies++ = offset; 1657 if (--ncookies <= 0) 1658 goto out; 1659 } 1660 } 1661 } 1662 } 1663 1664 d_name_storage = kmalloc(WIN_MAXLEN, M_TEMP, M_WAITOK); 1665 off = offset; 1666 1667 while (uio->uio_resid > 0) { 1668 lbn = de_off2cn(pmp, offset - bias); 1669 on = (offset - bias) & pmp->pm_crbomask; 1670 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1671 diff = dep->de_FileSize - (offset - bias); 1672 if (diff <= 0) 1673 break; 1674 n = min(n, diff); 1675 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1676 if (error) 1677 break; 1678 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), blsize, &bp); 1679 if (error) { 1680 brelse(bp); 1681 kfree(d_name_storage, M_TEMP); 1682 goto done; 1683 } 1684 n = min(n, blsize - bp->b_resid); 1685 1686 /* 1687 * Convert from dos directory entries to fs-independent 1688 * directory entries. 1689 */ 1690 for (dentp = (struct direntry *)(bp->b_data + on); 1691 (char *)dentp < bp->b_data + on + n; 1692 dentp++, offset += sizeof(struct direntry)) { 1693 #if 0 1694 kprintf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1695 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1696 #endif 1697 d_name = d_name_storage; 1698 /* 1699 * If this is an unused entry, we can stop. 1700 */ 1701 if (dentp->deName[0] == SLOT_EMPTY) { 1702 brelse(bp); 1703 goto out; 1704 } 1705 /* 1706 * Skip deleted entries. 1707 */ 1708 if (dentp->deName[0] == SLOT_DELETED) { 1709 chksum = -1; 1710 continue; 1711 } 1712 1713 /* 1714 * Handle Win95 long directory entries 1715 */ 1716 if (dentp->deAttributes == ATTR_WIN95) { 1717 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1718 continue; 1719 chksum = win2unixfn((struct winentry *)dentp, 1720 d_name, &d_namlen, chksum, 1721 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1722 pmp->pm_u2w); 1723 continue; 1724 } 1725 1726 /* 1727 * Skip volume labels 1728 */ 1729 if (dentp->deAttributes & ATTR_VOLUME) { 1730 chksum = -1; 1731 continue; 1732 } 1733 /* 1734 * This computation of d_ino must match 1735 * the computation of va_fileid in 1736 * msdosfs_getattr. 1737 */ 1738 if (dentp->deAttributes & ATTR_DIRECTORY) { 1739 d_ino = getushort(dentp->deStartCluster); 1740 if (FAT32(pmp)) 1741 d_ino |= getushort(dentp->deHighClust) << 16; 1742 /* if this is the root directory */ 1743 if (d_ino != MSDOSFSROOT) 1744 d_ino = xcntobn(pmp, d_ino) * dirsperblk; 1745 else if (FAT32(pmp)) 1746 d_ino = xcntobn(pmp, pmp->pm_rootdirblk) 1747 * dirsperblk; 1748 else 1749 d_ino = 1; 1750 d_type = DT_DIR; 1751 } else { 1752 d_ino = offset / sizeof(struct direntry); 1753 d_type = DT_REG; 1754 } 1755 if (chksum != winChksum(dentp->deName)) { 1756 d_namlen = dos2unixfn(dentp->deName, 1757 (u_char *)d_name, 1758 dentp->deLowerCase | 1759 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1760 (LCASE_BASE | LCASE_EXT) : 0), 1761 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1762 pmp->pm_d2u, 1763 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1764 pmp->pm_ul); 1765 } 1766 chksum = -1; 1767 if (vop_write_dirent(&error, uio, d_ino, d_type, 1768 d_namlen, d_name)) { 1769 brelse(bp); 1770 goto out; 1771 } 1772 if (error) { 1773 brelse(bp); 1774 goto out; 1775 } 1776 1777 if (cookies) { 1778 *cookies++ = offset + sizeof(struct direntry); 1779 if (--ncookies <= 0) { 1780 brelse(bp); 1781 goto out; 1782 } 1783 } 1784 off = offset + sizeof(struct direntry); 1785 } 1786 brelse(bp); 1787 } 1788 out: 1789 if (d_name_storage != NULL) 1790 kfree(d_name_storage, M_TEMP); 1791 1792 /* Subtract unused cookies */ 1793 if (ap->a_ncookies) 1794 *ap->a_ncookies -= ncookies; 1795 1796 uio->uio_offset = off; 1797 1798 /* 1799 * Set the eofflag (NFS uses it) 1800 */ 1801 if (ap->a_eofflag) { 1802 if (dep->de_FileSize - (offset - bias) <= 0) 1803 *ap->a_eofflag = 1; 1804 else 1805 *ap->a_eofflag = 0; 1806 } 1807 done: 1808 vn_unlock(ap->a_vp); 1809 return (error); 1810 } 1811 1812 /* 1813 * vp - address of vnode file the file 1814 * bn - which cluster we are interested in mapping to a filesystem block number. 1815 * vpp - returns the vnode for the block special file holding the filesystem 1816 * containing the file of interest 1817 * bnp - address of where to return the filesystem relative block number 1818 * 1819 * msdosfs_bmap(struct vnode *a_vp, off_t a_loffset, 1820 * off_t *a_doffsetp, int *a_runp, int *a_runb) 1821 */ 1822 static int 1823 msdosfs_bmap(struct vop_bmap_args *ap) 1824 { 1825 struct denode *dep = VTODE(ap->a_vp); 1826 struct msdosfsmount *pmp = dep->de_pmp; 1827 daddr_t lbn; 1828 daddr_t dbn; 1829 int error; 1830 1831 if (ap->a_doffsetp == NULL) 1832 return (0); 1833 if (ap->a_runp) { 1834 /* 1835 * Sequential clusters should be counted here. 1836 */ 1837 *ap->a_runp = 0; 1838 } 1839 if (ap->a_runb) { 1840 *ap->a_runb = 0; 1841 } 1842 KKASSERT(((int)ap->a_loffset & ((1 << pmp->pm_cnshift) - 1)) == 0); 1843 lbn = de_off2cn(pmp, ap->a_loffset); 1844 error = pcbmap(dep, lbn, &dbn, NULL, NULL); 1845 if (error || dbn == (daddr_t)-1) { 1846 *ap->a_doffsetp = NOOFFSET; 1847 } else { 1848 *ap->a_doffsetp = de_bntodoff(pmp, dbn); 1849 } 1850 return (error); 1851 } 1852 1853 /* 1854 * msdosfs_strategy(struct vnode *a_vp, struct bio *a_bio) 1855 */ 1856 static int 1857 msdosfs_strategy(struct vop_strategy_args *ap) 1858 { 1859 struct bio *bio = ap->a_bio; 1860 struct bio *nbio; 1861 struct buf *bp = bio->bio_buf; 1862 struct vnode *vp = ap->a_vp; 1863 struct denode *dep = VTODE(vp); 1864 struct msdosfsmount *pmp = dep->de_pmp; 1865 int error = 0; 1866 daddr_t dblkno; 1867 1868 if (vp->v_type == VBLK || vp->v_type == VCHR) 1869 panic("msdosfs_strategy: spec"); 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 nbio = push_bio(bio); 1877 if (nbio->bio_offset == NOOFFSET) { 1878 error = pcbmap(dep, de_off2cn(pmp, bio->bio_offset), 1879 &dblkno, NULL, NULL); 1880 if (error) { 1881 bp->b_error = error; 1882 bp->b_flags |= B_ERROR; 1883 /* I/O was never started on nbio, must biodone(bio) */ 1884 biodone(bio); 1885 return (error); 1886 } 1887 if (dblkno == (daddr_t)-1) { 1888 nbio->bio_offset = NOOFFSET; 1889 vfs_bio_clrbuf(bp); 1890 } else { 1891 nbio->bio_offset = de_bntodoff(pmp, dblkno); 1892 } 1893 } 1894 if (nbio->bio_offset == NOOFFSET) { 1895 /* I/O was never started on nbio, must biodone(bio) */ 1896 biodone(bio); 1897 return (0); 1898 } 1899 /* 1900 * Read/write the block from/to the disk that contains the desired 1901 * file block. 1902 */ 1903 vn_strategy(dep->de_devvp, nbio); 1904 return (0); 1905 } 1906 1907 /* 1908 * msdosfs_print(struct vnode *vp) 1909 */ 1910 static int 1911 msdosfs_print(struct vop_print_args *ap) 1912 { 1913 struct denode *dep = VTODE(ap->a_vp); 1914 1915 kprintf( 1916 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1917 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1918 kprintf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1919 lockmgr_printinfo(&ap->a_vp->v_lock); 1920 kprintf("\n"); 1921 return (0); 1922 } 1923 1924 /* 1925 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval) 1926 */ 1927 static int 1928 msdosfs_pathconf(struct vop_pathconf_args *ap) 1929 { 1930 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1931 1932 switch (ap->a_name) { 1933 case _PC_LINK_MAX: 1934 *ap->a_retval = 1; 1935 return (0); 1936 case _PC_NAME_MAX: 1937 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1938 return (0); 1939 case _PC_PATH_MAX: 1940 *ap->a_retval = PATH_MAX; 1941 return (0); 1942 case _PC_CHOWN_RESTRICTED: 1943 *ap->a_retval = 1; 1944 return (0); 1945 case _PC_NO_TRUNC: 1946 *ap->a_retval = 0; 1947 return (0); 1948 default: 1949 return (EINVAL); 1950 } 1951 /* NOTREACHED */ 1952 } 1953 1954 /* Global vfs data structures for msdosfs */ 1955 struct vop_ops msdosfs_vnode_vops = { 1956 .vop_default = vop_defaultop, 1957 .vop_access = msdosfs_access, 1958 .vop_bmap = msdosfs_bmap, 1959 .vop_old_lookup = msdosfs_lookup, 1960 .vop_open = msdosfs_open, 1961 .vop_close = msdosfs_close, 1962 .vop_old_create = msdosfs_create, 1963 .vop_fsync = msdosfs_fsync, 1964 .vop_getattr = msdosfs_getattr, 1965 .vop_inactive = msdosfs_inactive, 1966 .vop_old_link = msdosfs_link, 1967 .vop_old_mkdir = msdosfs_mkdir, 1968 .vop_old_mknod = msdosfs_mknod, 1969 .vop_pathconf = msdosfs_pathconf, 1970 .vop_print = msdosfs_print, 1971 .vop_read = msdosfs_read, 1972 .vop_readdir = msdosfs_readdir, 1973 .vop_reclaim = msdosfs_reclaim, 1974 .vop_old_remove = msdosfs_remove, 1975 .vop_old_rename = msdosfs_rename, 1976 .vop_old_rmdir = msdosfs_rmdir, 1977 .vop_setattr = msdosfs_setattr, 1978 .vop_strategy = msdosfs_strategy, 1979 .vop_old_symlink = msdosfs_symlink, 1980 .vop_write = msdosfs_write, 1981 .vop_getpages = vop_stdgetpages, 1982 .vop_putpages = vop_stdputpages 1983 }; 1984