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 1.18 2004/08/28 19:02:18 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/namei.h> 60 #include <sys/mount.h> 61 #include <sys/unistd.h> 62 #include <sys/vnode.h> 63 #include <sys/malloc.h> 64 #include <sys/dirent.h> 65 #include <sys/signalvar.h> 66 67 #include <vm/vm.h> 68 #include <vm/vm_extern.h> 69 #include <vm/vm_zone.h> 70 #include <vm/vnode_pager.h> 71 72 #include <sys/buf2.h> 73 74 #include "bpb.h" 75 #include "direntry.h" 76 #include "denode.h" 77 #include "msdosfsmount.h" 78 #include "fat.h" 79 80 #define DOS_FILESIZE_MAX 0xffffffff 81 82 /* 83 * Prototypes for MSDOSFS vnode operations 84 */ 85 static int msdosfs_create (struct vop_create_args *); 86 static int msdosfs_mknod (struct vop_mknod_args *); 87 static int msdosfs_close (struct vop_close_args *); 88 static int msdosfs_access (struct vop_access_args *); 89 static int msdosfs_getattr (struct vop_getattr_args *); 90 static int msdosfs_setattr (struct vop_setattr_args *); 91 static int msdosfs_read (struct vop_read_args *); 92 static int msdosfs_write (struct vop_write_args *); 93 static int msdosfs_fsync (struct vop_fsync_args *); 94 static int msdosfs_remove (struct vop_remove_args *); 95 static int msdosfs_link (struct vop_link_args *); 96 static int msdosfs_rename (struct vop_rename_args *); 97 static int msdosfs_mkdir (struct vop_mkdir_args *); 98 static int msdosfs_rmdir (struct vop_rmdir_args *); 99 static int msdosfs_symlink (struct vop_symlink_args *); 100 static int msdosfs_readdir (struct vop_readdir_args *); 101 static int msdosfs_bmap (struct vop_bmap_args *); 102 static int msdosfs_strategy (struct vop_strategy_args *); 103 static int msdosfs_print (struct vop_print_args *); 104 static int msdosfs_pathconf (struct vop_pathconf_args *ap); 105 static int msdosfs_getpages (struct vop_getpages_args *); 106 static int msdosfs_putpages (struct vop_putpages_args *); 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 * msdosfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 133 * struct componentname *a_cnp, struct vattr *a_vap) 134 */ 135 static int 136 msdosfs_create(struct vop_create_args *ap) 137 { 138 struct componentname *cnp = ap->a_cnp; 139 struct denode ndirent; 140 struct denode *dep; 141 struct denode *pdep = VTODE(ap->a_dvp); 142 struct timespec ts; 143 int error; 144 145 #ifdef MSDOSFS_DEBUG 146 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 147 #endif 148 149 /* 150 * If this is the root directory and there is no space left we 151 * can't do anything. This is because the root directory can not 152 * change size. 153 */ 154 if (pdep->de_StartCluster == MSDOSFSROOT 155 && pdep->de_fndoffset >= pdep->de_FileSize) { 156 error = ENOSPC; 157 goto bad; 158 } 159 160 /* 161 * Create a directory entry for the file, then call createde() to 162 * have it installed. NOTE: DOS files are always executable. We 163 * use the absence of the owner write bit to make the file 164 * readonly. 165 */ 166 #ifdef DIAGNOSTIC 167 if ((cnp->cn_flags & CNP_HASBUF) == 0) 168 panic("msdosfs_create: no name"); 169 #endif 170 bzero(&ndirent, sizeof(ndirent)); 171 error = uniqdosname(pdep, cnp, ndirent.de_Name); 172 if (error) 173 goto bad; 174 175 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 176 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 177 ndirent.de_LowerCase = 0; 178 ndirent.de_StartCluster = 0; 179 ndirent.de_FileSize = 0; 180 ndirent.de_dev = pdep->de_dev; 181 ndirent.de_devvp = pdep->de_devvp; 182 ndirent.de_pmp = pdep->de_pmp; 183 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 184 getnanotime(&ts); 185 DETIMES(&ndirent, &ts, &ts, &ts); 186 error = createde(&ndirent, pdep, &dep, cnp); 187 if (error) 188 goto bad; 189 *ap->a_vpp = DETOV(dep); 190 return (0); 191 192 bad: 193 return (error); 194 } 195 196 /* 197 * msdosfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, 198 * struct componentname *a_cnp, struct vattr *a_vap) 199 */ 200 static int 201 msdosfs_mknod(struct vop_mknod_args *ap) 202 { 203 switch (ap->a_vap->va_type) { 204 case VDIR: 205 return (msdosfs_mkdir((struct vop_mkdir_args *)ap)); 206 break; 207 208 case VREG: 209 return (msdosfs_create((struct vop_create_args *)ap)); 210 break; 211 212 default: 213 return (EINVAL); 214 } 215 /* NOTREACHED */ 216 } 217 218 /* 219 * msdosfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, 220 * struct thread *a_td) 221 */ 222 static int 223 msdosfs_close(struct vop_close_args *ap) 224 { 225 struct vnode *vp = ap->a_vp; 226 struct denode *dep = VTODE(vp); 227 struct timespec ts; 228 lwkt_tokref vlock; 229 230 lwkt_gettoken(&vlock, vp->v_interlock); 231 if (vp->v_usecount > 1) { 232 getnanotime(&ts); 233 if (vp->v_usecount > 1) { 234 DETIMES(dep, &ts, &ts, &ts); 235 } 236 } 237 lwkt_reltoken(&vlock); 238 return 0; 239 } 240 241 /* 242 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 243 * struct thread *a_td) 244 */ 245 static int 246 msdosfs_access(struct vop_access_args *ap) 247 { 248 struct vnode *vp = ap->a_vp; 249 struct denode *dep = VTODE(ap->a_vp); 250 struct msdosfsmount *pmp = dep->de_pmp; 251 struct ucred *cred = ap->a_cred; 252 mode_t mask, file_mode, mode = ap->a_mode; 253 gid_t *gp; 254 int i; 255 256 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 257 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 258 file_mode &= pmp->pm_mask; 259 260 /* 261 * Disallow write attempts on read-only file systems; 262 * unless the file is a socket, fifo, or a block or 263 * character device resident on the file system. 264 */ 265 if (mode & VWRITE) { 266 switch (vp->v_type) { 267 case VDIR: 268 case VLNK: 269 case VREG: 270 if (vp->v_mount->mnt_flag & MNT_RDONLY) 271 return (EROFS); 272 break; 273 default: 274 break; 275 } 276 } 277 278 /* User id 0 always gets access. */ 279 if (cred->cr_uid == 0) 280 return 0; 281 282 mask = 0; 283 284 /* Otherwise, check the owner. */ 285 if (cred->cr_uid == pmp->pm_uid) { 286 if (mode & VEXEC) 287 mask |= S_IXUSR; 288 if (mode & VREAD) 289 mask |= S_IRUSR; 290 if (mode & VWRITE) 291 mask |= S_IWUSR; 292 return (file_mode & mask) == mask ? 0 : EACCES; 293 } 294 295 /* Otherwise, check the groups. */ 296 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 297 if (pmp->pm_gid == *gp) { 298 if (mode & VEXEC) 299 mask |= S_IXGRP; 300 if (mode & VREAD) 301 mask |= S_IRGRP; 302 if (mode & VWRITE) 303 mask |= S_IWGRP; 304 return (file_mode & mask) == mask ? 0 : EACCES; 305 } 306 307 /* Otherwise, check everyone else. */ 308 if (mode & VEXEC) 309 mask |= S_IXOTH; 310 if (mode & VREAD) 311 mask |= S_IROTH; 312 if (mode & VWRITE) 313 mask |= S_IWOTH; 314 return (file_mode & mask) == mask ? 0 : EACCES; 315 } 316 317 /* 318 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap, 319 * struct ucred *a_cred, struct thread *a_td) 320 */ 321 static int 322 msdosfs_getattr(struct vop_getattr_args *ap) 323 { 324 struct denode *dep = VTODE(ap->a_vp); 325 struct msdosfsmount *pmp = dep->de_pmp; 326 struct vattr *vap = ap->a_vap; 327 mode_t mode; 328 struct timespec ts; 329 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 330 u_long fileid; 331 332 getnanotime(&ts); 333 DETIMES(dep, &ts, &ts, &ts); 334 vap->va_fsid = dev2udev(dep->de_dev); 335 /* 336 * The following computation of the fileid must be the same as that 337 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 338 * doesn't work. 339 */ 340 if (dep->de_Attributes & ATTR_DIRECTORY) { 341 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk; 342 if (dep->de_StartCluster == MSDOSFSROOT) 343 fileid = 1; 344 } else { 345 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk; 346 if (dep->de_dirclust == MSDOSFSROOT) 347 fileid = roottobn(pmp, 0) * dirsperblk; 348 fileid += dep->de_diroffset / sizeof(struct direntry); 349 } 350 vap->va_fileid = fileid; 351 if ((dep->de_Attributes & ATTR_READONLY) == 0) 352 mode = S_IRWXU|S_IRWXG|S_IRWXO; 353 else 354 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 355 vap->va_mode = mode & pmp->pm_mask; 356 vap->va_uid = pmp->pm_uid; 357 vap->va_gid = pmp->pm_gid; 358 vap->va_nlink = 1; 359 vap->va_rdev = 0; 360 vap->va_size = dep->de_FileSize; 361 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 362 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 363 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 364 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 365 } else { 366 vap->va_atime = vap->va_mtime; 367 vap->va_ctime = vap->va_mtime; 368 } 369 vap->va_flags = 0; 370 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 371 vap->va_flags |= SF_ARCHIVED; 372 vap->va_gen = 0; 373 vap->va_blocksize = pmp->pm_bpcluster; 374 vap->va_bytes = 375 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 376 vap->va_type = ap->a_vp->v_type; 377 vap->va_filerev = dep->de_modrev; 378 return (0); 379 } 380 381 /* 382 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap, 383 * struct ucred *a_cred, struct thread *a_td) 384 */ 385 static int 386 msdosfs_setattr(struct vop_setattr_args *ap) 387 { 388 struct vnode *vp = ap->a_vp; 389 struct denode *dep = VTODE(ap->a_vp); 390 struct msdosfsmount *pmp = dep->de_pmp; 391 struct vattr *vap = ap->a_vap; 392 struct ucred *cred = ap->a_cred; 393 int error = 0; 394 395 #ifdef MSDOSFS_DEBUG 396 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 397 ap->a_vp, vap, cred, ap->a_td); 398 #endif 399 400 /* 401 * Check for unsettable attributes. 402 */ 403 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 404 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 405 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 406 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 407 #ifdef MSDOSFS_DEBUG 408 printf("msdosfs_setattr(): returning EINVAL\n"); 409 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 410 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 411 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 412 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 413 printf(" va_uid %x, va_gid %x\n", 414 vap->va_uid, vap->va_gid); 415 #endif 416 return (EINVAL); 417 } 418 if (vap->va_flags != VNOVAL) { 419 if (vp->v_mount->mnt_flag & MNT_RDONLY) 420 return (EROFS); 421 if (cred->cr_uid != pmp->pm_uid && 422 (error = suser_cred(cred, PRISON_ROOT))) 423 return (error); 424 /* 425 * We are very inconsistent about handling unsupported 426 * attributes. We ignored the access time and the 427 * read and execute bits. We were strict for the other 428 * attributes. 429 * 430 * Here we are strict, stricter than ufs in not allowing 431 * users to attempt to set SF_SETTABLE bits or anyone to 432 * set unsupported bits. However, we ignore attempts to 433 * set ATTR_ARCHIVE for directories `cp -pr' from a more 434 * sensible file system attempts it a lot. 435 */ 436 if (cred->cr_uid != 0) { 437 if (vap->va_flags & SF_SETTABLE) 438 return EPERM; 439 } 440 if (vap->va_flags & ~SF_ARCHIVED) 441 return EOPNOTSUPP; 442 if (vap->va_flags & SF_ARCHIVED) 443 dep->de_Attributes &= ~ATTR_ARCHIVE; 444 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 445 dep->de_Attributes |= ATTR_ARCHIVE; 446 dep->de_flag |= DE_MODIFIED; 447 } 448 449 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 450 uid_t uid; 451 gid_t gid; 452 453 if (vp->v_mount->mnt_flag & MNT_RDONLY) 454 return (EROFS); 455 uid = vap->va_uid; 456 if (uid == (uid_t)VNOVAL) 457 uid = pmp->pm_uid; 458 gid = vap->va_gid; 459 if (gid == (gid_t)VNOVAL) 460 gid = pmp->pm_gid; 461 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 462 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 463 (error = suser_cred(cred, PRISON_ROOT))) 464 return error; 465 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 466 return EINVAL; 467 } 468 469 if (vap->va_size != VNOVAL) { 470 /* 471 * Disallow write attempts on read-only file systems; 472 * unless the file is a socket, fifo, or a block or 473 * character device resident on the file system. 474 */ 475 switch (vp->v_type) { 476 case VDIR: 477 return (EISDIR); 478 /* NOT REACHED */ 479 case VLNK: 480 case VREG: 481 if (vp->v_mount->mnt_flag & MNT_RDONLY) 482 return (EROFS); 483 break; 484 default: 485 break; 486 } 487 error = detrunc(dep, vap->va_size, 0, ap->a_td); 488 if (error) 489 return error; 490 } 491 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 492 if (vp->v_mount->mnt_flag & MNT_RDONLY) 493 return (EROFS); 494 if (cred->cr_uid != pmp->pm_uid && 495 (error = suser_cred(cred, PRISON_ROOT)) && 496 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 497 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td)))) 498 return (error); 499 if (vp->v_type != VDIR) { 500 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 501 vap->va_atime.tv_sec != VNOVAL) { 502 dep->de_flag &= ~DE_ACCESS; 503 unix2dostime(&vap->va_atime, &dep->de_ADate, 504 NULL, NULL); 505 } 506 if (vap->va_mtime.tv_sec != VNOVAL) { 507 dep->de_flag &= ~DE_UPDATE; 508 unix2dostime(&vap->va_mtime, &dep->de_MDate, 509 &dep->de_MTime, NULL); 510 } 511 dep->de_Attributes |= ATTR_ARCHIVE; 512 dep->de_flag |= DE_MODIFIED; 513 } 514 } 515 /* 516 * DOS files only have the ability to have their writability 517 * attribute set, so we use the owner write bit to set the readonly 518 * attribute. 519 */ 520 if (vap->va_mode != (mode_t)VNOVAL) { 521 if (vp->v_mount->mnt_flag & MNT_RDONLY) 522 return (EROFS); 523 if (cred->cr_uid != pmp->pm_uid && 524 (error = suser_cred(cred, PRISON_ROOT))) 525 return (error); 526 if (vp->v_type != VDIR) { 527 /* We ignore the read and execute bits. */ 528 if (vap->va_mode & VWRITE) 529 dep->de_Attributes &= ~ATTR_READONLY; 530 else 531 dep->de_Attributes |= ATTR_READONLY; 532 dep->de_Attributes |= ATTR_ARCHIVE; 533 dep->de_flag |= DE_MODIFIED; 534 } 535 } 536 return (deupdat(dep, 1)); 537 } 538 539 /* 540 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 541 * struct ucred *a_cred) 542 */ 543 static int 544 msdosfs_read(struct vop_read_args *ap) 545 { 546 int error = 0; 547 int blsize; 548 int isadir; 549 int orig_resid; 550 u_int n; 551 u_long diff; 552 u_long on; 553 daddr_t lbn; 554 daddr_t rablock; 555 int rasize; 556 int seqcount; 557 struct buf *bp; 558 struct vnode *vp = ap->a_vp; 559 struct denode *dep = VTODE(vp); 560 struct msdosfsmount *pmp = dep->de_pmp; 561 struct uio *uio = ap->a_uio; 562 563 if (uio->uio_offset < 0) 564 return (EINVAL); 565 566 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 567 return (0); 568 /* 569 * If they didn't ask for any data, then we are done. 570 */ 571 orig_resid = uio->uio_resid; 572 if (orig_resid <= 0) 573 return (0); 574 575 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 576 577 isadir = dep->de_Attributes & ATTR_DIRECTORY; 578 do { 579 if (uio->uio_offset >= dep->de_FileSize) 580 break; 581 lbn = de_cluster(pmp, uio->uio_offset); 582 /* 583 * If we are operating on a directory file then be sure to 584 * do i/o with the vnode for the filesystem instead of the 585 * vnode for the directory. 586 */ 587 if (isadir) { 588 /* convert cluster # to block # */ 589 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 590 if (error == E2BIG) { 591 error = EINVAL; 592 break; 593 } else if (error) 594 break; 595 error = bread(pmp->pm_devvp, lbn, blsize, &bp); 596 } else { 597 blsize = pmp->pm_bpcluster; 598 rablock = lbn + 1; 599 if (seqcount > 1 && 600 de_cn2off(pmp, rablock) < dep->de_FileSize) { 601 rasize = pmp->pm_bpcluster; 602 error = breadn(vp, lbn, blsize, 603 &rablock, &rasize, 1, &bp); 604 } else { 605 error = bread(vp, lbn, blsize, &bp); 606 } 607 } 608 if (error) { 609 brelse(bp); 610 break; 611 } 612 on = uio->uio_offset & pmp->pm_crbomask; 613 diff = pmp->pm_bpcluster - on; 614 n = diff > uio->uio_resid ? uio->uio_resid : diff; 615 diff = dep->de_FileSize - uio->uio_offset; 616 if (diff < n) 617 n = diff; 618 diff = blsize - bp->b_resid; 619 if (diff < n) 620 n = diff; 621 error = uiomove(bp->b_data + on, (int) n, uio); 622 brelse(bp); 623 } while (error == 0 && uio->uio_resid > 0 && n != 0); 624 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 625 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 626 dep->de_flag |= DE_ACCESS; 627 return (error); 628 } 629 630 /* 631 * Write data to a file or directory. 632 * 633 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 634 * struct ucred *a_cred) 635 */ 636 static int 637 msdosfs_write(struct vop_write_args *ap) 638 { 639 int n; 640 int croffset; 641 int resid; 642 u_long osize; 643 int error = 0; 644 u_long count; 645 daddr_t bn, lastcn; 646 struct buf *bp; 647 int ioflag = ap->a_ioflag; 648 struct uio *uio = ap->a_uio; 649 struct thread *td = uio->uio_td; 650 struct vnode *vp = ap->a_vp; 651 struct vnode *thisvp; 652 struct denode *dep = VTODE(vp); 653 struct msdosfsmount *pmp = dep->de_pmp; 654 struct proc *p = (td ? td->td_proc : NULL); 655 656 #ifdef MSDOSFS_DEBUG 657 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 658 vp, uio, ioflag, cred); 659 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 660 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 661 #endif 662 663 switch (vp->v_type) { 664 case VREG: 665 if (ioflag & IO_APPEND) 666 uio->uio_offset = dep->de_FileSize; 667 thisvp = vp; 668 break; 669 case VDIR: 670 return EISDIR; 671 default: 672 panic("msdosfs_write(): bad file type"); 673 } 674 675 if (uio->uio_offset < 0) 676 return (EFBIG); 677 678 if (uio->uio_resid == 0) 679 return (0); 680 681 /* 682 * If they've exceeded their filesize limit, tell them about it. 683 */ 684 if (p && 685 ((uoff_t)uio->uio_offset + uio->uio_resid > 686 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 687 psignal(p, SIGXFSZ); 688 return (EFBIG); 689 } 690 691 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 692 return (EFBIG); 693 694 /* 695 * If the offset we are starting the write at is beyond the end of 696 * the file, then they've done a seek. Unix filesystems allow 697 * files with holes in them, DOS doesn't so we must fill the hole 698 * with zeroed blocks. 699 */ 700 if (uio->uio_offset > dep->de_FileSize) { 701 error = deextend(dep, uio->uio_offset); 702 if (error) 703 return (error); 704 } 705 706 /* 707 * Remember some values in case the write fails. 708 */ 709 resid = uio->uio_resid; 710 osize = dep->de_FileSize; 711 712 /* 713 * If we write beyond the end of the file, extend it to its ultimate 714 * size ahead of the time to hopefully get a contiguous area. 715 */ 716 if (uio->uio_offset + resid > osize) { 717 count = de_clcount(pmp, uio->uio_offset + resid) - 718 de_clcount(pmp, osize); 719 error = extendfile(dep, count, NULL, NULL, 0); 720 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 721 goto errexit; 722 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 723 } else 724 lastcn = de_clcount(pmp, osize) - 1; 725 726 do { 727 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 728 error = ENOSPC; 729 break; 730 } 731 732 croffset = uio->uio_offset & pmp->pm_crbomask; 733 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 734 if (uio->uio_offset + n > dep->de_FileSize) { 735 dep->de_FileSize = uio->uio_offset + n; 736 /* The object size needs to be set before buffer is allocated */ 737 vnode_pager_setsize(vp, dep->de_FileSize); 738 } 739 740 bn = de_cluster(pmp, uio->uio_offset); 741 if ((uio->uio_offset & pmp->pm_crbomask) == 0 742 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 743 > de_cluster(pmp, uio->uio_offset) 744 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 745 /* 746 * If either the whole cluster gets written, 747 * or we write the cluster from its start beyond EOF, 748 * then no need to read data from disk. 749 */ 750 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 751 clrbuf(bp); 752 /* 753 * Do the bmap now, since pcbmap needs buffers 754 * for the fat table. (see msdosfs_strategy) 755 */ 756 if (bp->b_blkno == bp->b_lblkno) { 757 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 758 0, 0); 759 if (error) 760 bp->b_blkno = -1; 761 } 762 if (bp->b_blkno == -1) { 763 brelse(bp); 764 if (!error) 765 error = EIO; /* XXX */ 766 break; 767 } 768 } else { 769 /* 770 * The block we need to write into exists, so read it in. 771 */ 772 error = bread(thisvp, bn, pmp->pm_bpcluster, &bp); 773 if (error) { 774 brelse(bp); 775 break; 776 } 777 } 778 779 /* 780 * Should these vnode_pager_* functions be done on dir 781 * files? 782 */ 783 784 /* 785 * Copy the data from user space into the buf header. 786 */ 787 error = uiomove(bp->b_data + croffset, n, uio); 788 if (error) { 789 brelse(bp); 790 break; 791 } 792 793 /* 794 * If they want this synchronous then write it and wait for 795 * it. Otherwise, if on a cluster boundary write it 796 * asynchronously so we can move on to the next block 797 * without delay. Otherwise do a delayed write because we 798 * may want to write somemore into the block later. 799 */ 800 if (ioflag & IO_SYNC) 801 (void) bwrite(bp); 802 else if (n + croffset == pmp->pm_bpcluster) 803 bawrite(bp); 804 else 805 bdwrite(bp); 806 dep->de_flag |= DE_UPDATE; 807 } while (error == 0 && uio->uio_resid > 0); 808 809 /* 810 * If the write failed and they want us to, truncate the file back 811 * to the size it was before the write was attempted. 812 */ 813 errexit: 814 if (error) { 815 if (ioflag & IO_UNIT) { 816 detrunc(dep, osize, ioflag & IO_SYNC, NULL); 817 uio->uio_offset -= resid - uio->uio_resid; 818 uio->uio_resid = resid; 819 } else { 820 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NULL); 821 if (uio->uio_resid != resid) 822 error = 0; 823 } 824 } else if (ioflag & IO_SYNC) 825 error = deupdat(dep, 1); 826 return (error); 827 } 828 829 /* 830 * Flush the blocks of a file to disk. 831 * 832 * This function is worthless for vnodes that represent directories. Maybe we 833 * could just do a sync if they try an fsync on a directory file. 834 * 835 * msdosfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor, 836 * struct thread *a_td) 837 */ 838 static int 839 msdosfs_fsync(struct vop_fsync_args *ap) 840 { 841 struct vnode *vp = ap->a_vp; 842 int s; 843 struct buf *bp, *nbp; 844 845 /* 846 * Flush all dirty buffers associated with a vnode. 847 */ 848 loop: 849 s = splbio(); 850 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 851 nbp = TAILQ_NEXT(bp, b_vnbufs); 852 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) 853 continue; 854 if ((bp->b_flags & B_DELWRI) == 0) 855 panic("msdosfs_fsync: not dirty"); 856 bremfree(bp); 857 splx(s); 858 (void) bwrite(bp); 859 goto loop; 860 } 861 while (vp->v_numoutput) { 862 vp->v_flag |= VBWAIT; 863 (void) tsleep((caddr_t)&vp->v_numoutput, 0, "msdosfsn", 0); 864 } 865 #ifdef DIAGNOSTIC 866 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) { 867 vprint("msdosfs_fsync: dirty", vp); 868 goto loop; 869 } 870 #endif 871 splx(s); 872 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 873 } 874 875 /* 876 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 877 * struct componentname *a_cnp) 878 */ 879 static int 880 msdosfs_remove(struct vop_remove_args *ap) 881 { 882 struct denode *dep = VTODE(ap->a_vp); 883 struct denode *ddep = VTODE(ap->a_dvp); 884 int error; 885 886 if (ap->a_vp->v_type == VDIR) 887 error = EPERM; 888 else 889 error = removede(ddep, dep); 890 #ifdef MSDOSFS_DEBUG 891 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 892 #endif 893 return (error); 894 } 895 896 /* 897 * DOS filesystems don't know what links are. But since we already called 898 * msdosfs_lookup() with create and lockparent, the parent is locked so we 899 * have to free it before we return the error. 900 * 901 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 902 * struct componentname *a_cnp) 903 */ 904 static int 905 msdosfs_link(struct vop_link_args *ap) 906 { 907 return (EOPNOTSUPP); 908 } 909 910 /* 911 * Renames on files require moving the denode to a new hash queue since the 912 * denode's location is used to compute which hash queue to put the file 913 * in. Unless it is a rename in place. For example "mv a b". 914 * 915 * What follows is the basic algorithm: 916 * 917 * if (file move) { 918 * if (dest file exists) { 919 * remove dest file 920 * } 921 * if (dest and src in same directory) { 922 * rewrite name in existing directory slot 923 * } else { 924 * write new entry in dest directory 925 * update offset and dirclust in denode 926 * move denode to new hash chain 927 * clear old directory entry 928 * } 929 * } else { 930 * directory move 931 * if (dest directory exists) { 932 * if (dest is not empty) { 933 * return ENOTEMPTY 934 * } 935 * remove dest directory 936 * } 937 * if (dest and src in same directory) { 938 * rewrite name in existing entry 939 * } else { 940 * be sure dest is not a child of src directory 941 * write entry in dest directory 942 * update "." and ".." in moved directory 943 * clear old directory entry for moved directory 944 * } 945 * } 946 * 947 * On entry: 948 * source's parent directory is unlocked 949 * source file or directory is unlocked 950 * destination's parent directory is locked 951 * destination file or directory is locked if it exists 952 * 953 * On exit: 954 * all denodes should be released 955 * 956 * Notes: 957 * I'm not sure how the memory containing the pathnames pointed at by the 958 * componentname structures is freed, there may be some memory bleeding 959 * for each rename done. 960 * 961 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 962 * struct componentname *a_fcnp, struct vnode *a_tdvp, 963 * struct vnode *a_tvp, struct componentname *a_tcnp) 964 */ 965 static int 966 msdosfs_rename(struct vop_rename_args *ap) 967 { 968 struct vnode *tdvp = ap->a_tdvp; 969 struct vnode *fvp = ap->a_fvp; 970 struct vnode *fdvp = ap->a_fdvp; 971 struct vnode *tvp = ap->a_tvp; 972 struct componentname *tcnp = ap->a_tcnp; 973 struct componentname *fcnp = ap->a_fcnp; 974 struct thread *td = fcnp->cn_td; 975 struct denode *ip, *xp, *dp, *zp; 976 u_char toname[11], oldname[11]; 977 u_long from_diroffset, to_diroffset; 978 u_char to_count; 979 int doingdirectory = 0, newparent = 0; 980 int error; 981 u_long cn; 982 daddr_t bn; 983 struct denode *fddep; /* from file's parent directory */ 984 struct msdosfsmount *pmp; 985 struct direntry *dotdotp; 986 struct buf *bp; 987 988 fddep = VTODE(ap->a_fdvp); 989 pmp = fddep->de_pmp; 990 991 pmp = VFSTOMSDOSFS(fdvp->v_mount); 992 993 #ifdef DIAGNOSTIC 994 if ((tcnp->cn_flags & CNP_HASBUF) == 0 || 995 (fcnp->cn_flags & CNP_HASBUF) == 0) 996 panic("msdosfs_rename: no name"); 997 #endif 998 /* 999 * Check for cross-device rename. 1000 */ 1001 if ((fvp->v_mount != tdvp->v_mount) || 1002 (tvp && (fvp->v_mount != tvp->v_mount))) { 1003 error = EXDEV; 1004 abortit: 1005 if (tdvp == tvp) 1006 vrele(tdvp); 1007 else 1008 vput(tdvp); 1009 if (tvp) 1010 vput(tvp); 1011 vrele(fdvp); 1012 vrele(fvp); 1013 return (error); 1014 } 1015 1016 /* 1017 * If source and dest are the same, do nothing. 1018 */ 1019 if (tvp == fvp) { 1020 error = 0; 1021 goto abortit; 1022 } 1023 1024 error = vn_lock(fvp, NULL, LK_EXCLUSIVE, td); 1025 if (error) 1026 goto abortit; 1027 dp = VTODE(fdvp); 1028 ip = VTODE(fvp); 1029 1030 /* 1031 * Be sure we are not renaming ".", "..", or an alias of ".". This 1032 * leads to a crippled directory tree. It's pretty tough to do a 1033 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1034 * doesn't work if the ".." entry is missing. 1035 */ 1036 if (ip->de_Attributes & ATTR_DIRECTORY) { 1037 /* 1038 * Avoid ".", "..", and aliases of "." for obvious reasons. 1039 */ 1040 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1041 dp == ip || 1042 (fcnp->cn_flags & CNP_ISDOTDOT) || 1043 (tcnp->cn_flags & CNP_ISDOTDOT) || 1044 (ip->de_flag & DE_RENAME)) { 1045 VOP_UNLOCK(fvp, NULL, 0, td); 1046 error = EINVAL; 1047 goto abortit; 1048 } 1049 ip->de_flag |= DE_RENAME; 1050 doingdirectory++; 1051 } 1052 1053 /* 1054 * When the target exists, both the directory 1055 * and target vnodes are returned locked. 1056 */ 1057 dp = VTODE(tdvp); 1058 xp = tvp ? VTODE(tvp) : NULL; 1059 /* 1060 * Remember direntry place to use for destination 1061 */ 1062 to_diroffset = dp->de_fndoffset; 1063 to_count = dp->de_fndcnt; 1064 1065 /* 1066 * If ".." must be changed (ie the directory gets a new 1067 * parent) then the source directory must not be in the 1068 * directory heirarchy above the target, as this would 1069 * orphan everything below the source directory. Also 1070 * the user must have write permission in the source so 1071 * as to be able to change "..". We must repeat the call 1072 * to namei, as the parent directory is unlocked by the 1073 * call to doscheckpath(). 1074 */ 1075 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td); 1076 VOP_UNLOCK(fvp, NULL, 0, td); 1077 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1078 newparent = 1; 1079 if (doingdirectory && newparent) { 1080 if (error) /* write access check above */ 1081 goto bad; 1082 if (xp != NULL) 1083 vput(tvp); 1084 /* 1085 * doscheckpath() vput()'s dp, 1086 * so we have to do a relookup afterwards 1087 */ 1088 error = doscheckpath(ip, dp); 1089 if (error) 1090 goto out; 1091 if ((tcnp->cn_flags & CNP_SAVESTART) == 0) 1092 panic("msdosfs_rename: lost to startdir"); 1093 error = relookup(tdvp, &tvp, tcnp); 1094 if (error) 1095 goto out; 1096 dp = VTODE(tdvp); 1097 xp = tvp ? VTODE(tvp) : NULL; 1098 } 1099 1100 if (xp != NULL) { 1101 /* 1102 * Target must be empty if a directory and have no links 1103 * to it. Also, ensure source and target are compatible 1104 * (both directories, or both not directories). 1105 */ 1106 if (xp->de_Attributes & ATTR_DIRECTORY) { 1107 if (!dosdirempty(xp)) { 1108 error = ENOTEMPTY; 1109 goto bad; 1110 } 1111 if (!doingdirectory) { 1112 error = ENOTDIR; 1113 goto bad; 1114 } 1115 cache_purge(tdvp); 1116 } else if (doingdirectory) { 1117 error = EISDIR; 1118 goto bad; 1119 } 1120 error = removede(dp, xp); 1121 if (error) 1122 goto bad; 1123 vput(tvp); 1124 xp = NULL; 1125 } 1126 1127 /* 1128 * Convert the filename in tcnp into a dos filename. We copy this 1129 * into the denode and directory entry for the destination 1130 * file/directory. 1131 */ 1132 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1133 if (error) 1134 goto abortit; 1135 1136 /* 1137 * Since from wasn't locked at various places above, 1138 * have to do a relookup here. 1139 */ 1140 fcnp->cn_flags &= ~CNP_MODMASK; 1141 fcnp->cn_flags |= CNP_LOCKPARENT | CNP_LOCKLEAF; 1142 if ((fcnp->cn_flags & CNP_SAVESTART) == 0) 1143 panic("msdosfs_rename: lost from startdir"); 1144 if (!newparent) 1145 VOP_UNLOCK(tdvp, NULL, 0, td); 1146 if (relookup(fdvp, &fvp, fcnp) == 0) 1147 vrele(fdvp); 1148 if (fvp == NULL) { 1149 /* 1150 * From name has disappeared. 1151 */ 1152 if (doingdirectory) 1153 panic("rename: lost dir entry"); 1154 vrele(ap->a_fvp); 1155 if (newparent) 1156 VOP_UNLOCK(tdvp, NULL, 0, td); 1157 vrele(tdvp); 1158 return 0; 1159 } 1160 xp = VTODE(fvp); 1161 zp = VTODE(fdvp); 1162 from_diroffset = zp->de_fndoffset; 1163 1164 /* 1165 * Ensure that the directory entry still exists and has not 1166 * changed till now. If the source is a file the entry may 1167 * have been unlinked or renamed. In either case there is 1168 * no further work to be done. If the source is a directory 1169 * then it cannot have been rmdir'ed or renamed; this is 1170 * prohibited by the DE_RENAME flag. 1171 */ 1172 if (xp != ip) { 1173 if (doingdirectory) 1174 panic("rename: lost dir entry"); 1175 vrele(ap->a_fvp); 1176 VOP_UNLOCK(fvp, NULL, 0, td); 1177 if (newparent) 1178 VOP_UNLOCK(fdvp, NULL, 0, td); 1179 xp = NULL; 1180 } else { 1181 u_long new_dirclust; 1182 u_long new_diroffset; 1183 1184 vrele(fvp); 1185 xp = NULL; 1186 1187 /* 1188 * First write a new entry in the destination 1189 * directory and mark the entry in the source directory 1190 * as deleted. Then move the denode to the correct hash 1191 * chain for its new location in the filesystem. And, if 1192 * we moved a directory, then update its .. entry to point 1193 * to the new parent directory. 1194 */ 1195 bcopy(ip->de_Name, oldname, 11); 1196 bcopy(toname, ip->de_Name, 11); /* update denode */ 1197 dp->de_fndoffset = to_diroffset; 1198 dp->de_fndcnt = to_count; 1199 error = createde(ip, dp, (struct denode **)0, tcnp); 1200 if (error) { 1201 bcopy(oldname, ip->de_Name, 11); 1202 if (newparent) 1203 VOP_UNLOCK(fdvp, NULL, 0, td); 1204 VOP_UNLOCK(fvp, NULL, 0, td); 1205 goto bad; 1206 } 1207 ip->de_refcnt++; 1208 zp->de_fndoffset = from_diroffset; 1209 error = removede(zp, ip); 1210 if (error) { 1211 /* XXX should really panic here, fs is corrupt */ 1212 if (newparent) 1213 VOP_UNLOCK(fdvp, NULL, 0, td); 1214 VOP_UNLOCK(fvp, NULL, 0, td); 1215 goto bad; 1216 } 1217 if (!doingdirectory) { 1218 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1219 &new_dirclust, 0); 1220 if (error) { 1221 /* XXX should really panic here, fs is corrupt */ 1222 if (newparent) 1223 VOP_UNLOCK(fdvp, NULL, 0, td); 1224 VOP_UNLOCK(fvp, NULL, 0, td); 1225 goto bad; 1226 } 1227 if (new_dirclust == MSDOSFSROOT) 1228 new_diroffset = to_diroffset; 1229 else 1230 new_diroffset = to_diroffset & pmp->pm_crbomask; 1231 msdosfs_reinsert(ip, new_dirclust, new_diroffset); 1232 } 1233 if (newparent) 1234 VOP_UNLOCK(fdvp, NULL, 0, td); 1235 } 1236 1237 /* 1238 * If we moved a directory to a new parent directory, then we must 1239 * fixup the ".." entry in the moved directory. 1240 */ 1241 if (doingdirectory && newparent) { 1242 cn = ip->de_StartCluster; 1243 if (cn == MSDOSFSROOT) { 1244 /* this should never happen */ 1245 panic("msdosfs_rename(): updating .. in root directory?"); 1246 } else 1247 bn = cntobn(pmp, cn); 1248 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp); 1249 if (error) { 1250 /* XXX should really panic here, fs is corrupt */ 1251 brelse(bp); 1252 VOP_UNLOCK(fvp, NULL, 0, td); 1253 goto bad; 1254 } 1255 dotdotp = (struct direntry *)bp->b_data + 1; 1256 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1257 if (FAT32(pmp)) 1258 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1259 error = bwrite(bp); 1260 if (error) { 1261 /* XXX should really panic here, fs is corrupt */ 1262 VOP_UNLOCK(fvp, NULL, 0, td); 1263 goto bad; 1264 } 1265 } 1266 1267 VOP_UNLOCK(fvp, NULL, 0, td); 1268 bad: 1269 if (xp) 1270 vput(tvp); 1271 vput(tdvp); 1272 out: 1273 ip->de_flag &= ~DE_RENAME; 1274 vrele(fdvp); 1275 vrele(fvp); 1276 return (error); 1277 1278 } 1279 1280 static struct { 1281 struct direntry dot; 1282 struct direntry dotdot; 1283 } dosdirtemplate = { 1284 { ". ", " ", /* the . entry */ 1285 ATTR_DIRECTORY, /* file attribute */ 1286 0, /* reserved */ 1287 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1288 { 0, 0 }, /* access date */ 1289 { 0, 0 }, /* high bits of start cluster */ 1290 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1291 { 0, 0 }, /* startcluster */ 1292 { 0, 0, 0, 0 } /* filesize */ 1293 }, 1294 { ".. ", " ", /* the .. entry */ 1295 ATTR_DIRECTORY, /* file attribute */ 1296 0, /* reserved */ 1297 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1298 { 0, 0 }, /* access date */ 1299 { 0, 0 }, /* high bits of start cluster */ 1300 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1301 { 0, 0 }, /* startcluster */ 1302 { 0, 0, 0, 0 } /* filesize */ 1303 } 1304 }; 1305 1306 /* 1307 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 1308 * struct componentname *a_cnp, struct vattr *a_vap) 1309 */ 1310 static int 1311 msdosfs_mkdir(struct vop_mkdir_args *ap) 1312 { 1313 struct componentname *cnp = ap->a_cnp; 1314 struct denode *dep; 1315 struct denode *pdep = VTODE(ap->a_dvp); 1316 struct direntry *denp; 1317 struct msdosfsmount *pmp = pdep->de_pmp; 1318 struct buf *bp; 1319 u_long newcluster, pcl; 1320 int bn; 1321 int error; 1322 struct denode ndirent; 1323 struct timespec ts; 1324 1325 /* 1326 * If this is the root directory and there is no space left we 1327 * can't do anything. This is because the root directory can not 1328 * change size. 1329 */ 1330 if (pdep->de_StartCluster == MSDOSFSROOT 1331 && pdep->de_fndoffset >= pdep->de_FileSize) { 1332 error = ENOSPC; 1333 goto bad2; 1334 } 1335 1336 /* 1337 * Allocate a cluster to hold the about to be created directory. 1338 */ 1339 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1340 if (error) 1341 goto bad2; 1342 1343 bzero(&ndirent, sizeof(ndirent)); 1344 ndirent.de_pmp = pmp; 1345 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1346 getnanotime(&ts); 1347 DETIMES(&ndirent, &ts, &ts, &ts); 1348 1349 /* 1350 * Now fill the cluster with the "." and ".." entries. And write 1351 * the cluster to disk. This way it is there for the parent 1352 * directory to be pointing at if there were a crash. 1353 */ 1354 bn = cntobn(pmp, newcluster); 1355 /* always succeeds */ 1356 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1357 bzero(bp->b_data, pmp->pm_bpcluster); 1358 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1359 denp = (struct direntry *)bp->b_data; 1360 putushort(denp[0].deStartCluster, newcluster); 1361 putushort(denp[0].deCDate, ndirent.de_CDate); 1362 putushort(denp[0].deCTime, ndirent.de_CTime); 1363 denp[0].deCHundredth = ndirent.de_CHun; 1364 putushort(denp[0].deADate, ndirent.de_ADate); 1365 putushort(denp[0].deMDate, ndirent.de_MDate); 1366 putushort(denp[0].deMTime, ndirent.de_MTime); 1367 pcl = pdep->de_StartCluster; 1368 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1369 pcl = 0; 1370 putushort(denp[1].deStartCluster, pcl); 1371 putushort(denp[1].deCDate, ndirent.de_CDate); 1372 putushort(denp[1].deCTime, ndirent.de_CTime); 1373 denp[1].deCHundredth = ndirent.de_CHun; 1374 putushort(denp[1].deADate, ndirent.de_ADate); 1375 putushort(denp[1].deMDate, ndirent.de_MDate); 1376 putushort(denp[1].deMTime, ndirent.de_MTime); 1377 if (FAT32(pmp)) { 1378 putushort(denp[0].deHighClust, newcluster >> 16); 1379 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1380 } 1381 1382 error = bwrite(bp); 1383 if (error) 1384 goto bad; 1385 1386 /* 1387 * Now build up a directory entry pointing to the newly allocated 1388 * cluster. This will be written to an empty slot in the parent 1389 * directory. 1390 */ 1391 #ifdef DIAGNOSTIC 1392 if ((cnp->cn_flags & CNP_HASBUF) == 0) 1393 panic("msdosfs_mkdir: no name"); 1394 #endif 1395 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1396 if (error) 1397 goto bad; 1398 1399 ndirent.de_Attributes = ATTR_DIRECTORY; 1400 ndirent.de_LowerCase = 0; 1401 ndirent.de_StartCluster = newcluster; 1402 ndirent.de_FileSize = 0; 1403 ndirent.de_dev = pdep->de_dev; 1404 ndirent.de_devvp = pdep->de_devvp; 1405 error = createde(&ndirent, pdep, &dep, cnp); 1406 if (error) 1407 goto bad; 1408 *ap->a_vpp = DETOV(dep); 1409 return (0); 1410 1411 bad: 1412 clusterfree(pmp, newcluster, NULL); 1413 bad2: 1414 return (error); 1415 } 1416 1417 /* 1418 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 1419 * struct componentname *a_cnp) 1420 */ 1421 static int 1422 msdosfs_rmdir(struct vop_rmdir_args *ap) 1423 { 1424 struct vnode *vp = ap->a_vp; 1425 struct vnode *dvp = ap->a_dvp; 1426 struct componentname *cnp = ap->a_cnp; 1427 struct denode *ip, *dp; 1428 struct thread *td = cnp->cn_td; 1429 int error; 1430 1431 ip = VTODE(vp); 1432 dp = VTODE(dvp); 1433 1434 /* 1435 * Verify the directory is empty (and valid). 1436 * (Rmdir ".." won't be valid since 1437 * ".." will contain a reference to 1438 * the current directory and thus be 1439 * non-empty.) 1440 */ 1441 error = 0; 1442 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1443 error = ENOTEMPTY; 1444 goto out; 1445 } 1446 /* 1447 * Delete the entry from the directory. For dos filesystems this 1448 * gets rid of the directory entry on disk, the in memory copy 1449 * still exists but the de_refcnt is <= 0. This prevents it from 1450 * being found by deget(). When the vput() on dep is done we give 1451 * up access and eventually msdosfs_reclaim() will be called which 1452 * will remove it from the denode cache. 1453 */ 1454 error = removede(dp, ip); 1455 if (error) 1456 goto out; 1457 /* 1458 * This is where we decrement the link count in the parent 1459 * directory. Since dos filesystems don't do this we just purge 1460 * the name cache. 1461 */ 1462 cache_purge(dvp); 1463 VOP_UNLOCK(dvp, NULL, 0, td); 1464 /* 1465 * Truncate the directory that is being deleted. 1466 */ 1467 error = detrunc(ip, (u_long)0, IO_SYNC, td); 1468 cache_purge(vp); 1469 1470 vn_lock(dvp, NULL, LK_EXCLUSIVE | LK_RETRY, td); 1471 out: 1472 return (error); 1473 } 1474 1475 /* 1476 * DOS filesystems don't know what symlinks are. 1477 * 1478 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 1479 * struct componentname *a_cnp, struct vattr *a_vap, 1480 * char *a_target) 1481 */ 1482 static int 1483 msdosfs_symlink(struct vop_symlink_args *ap) 1484 { 1485 return (EOPNOTSUPP); 1486 } 1487 1488 /* 1489 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio, 1490 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies, 1491 * u_long **a_cookies) 1492 */ 1493 static int 1494 msdosfs_readdir(struct vop_readdir_args *ap) 1495 { 1496 int error = 0; 1497 int diff; 1498 long n; 1499 int blsize; 1500 long on; 1501 u_long cn; 1502 u_long fileno; 1503 u_long dirsperblk; 1504 long bias = 0; 1505 daddr_t bn, lbn; 1506 struct buf *bp; 1507 struct denode *dep = VTODE(ap->a_vp); 1508 struct msdosfsmount *pmp = dep->de_pmp; 1509 struct direntry *dentp; 1510 struct dirent dirbuf; 1511 struct uio *uio = ap->a_uio; 1512 u_long *cookies = NULL; 1513 int ncookies = 0; 1514 off_t offset, off; 1515 int chksum = -1; 1516 1517 #ifdef MSDOSFS_DEBUG 1518 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1519 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1520 #endif 1521 1522 /* 1523 * msdosfs_readdir() won't operate properly on regular files since 1524 * it does i/o only with the the filesystem vnode, and hence can 1525 * retrieve the wrong block from the buffer cache for a plain file. 1526 * So, fail attempts to readdir() on a plain file. 1527 */ 1528 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1529 return (ENOTDIR); 1530 1531 /* 1532 * To be safe, initialize dirbuf 1533 */ 1534 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1535 1536 /* 1537 * If the user buffer is smaller than the size of one dos directory 1538 * entry or the file offset is not a multiple of the size of a 1539 * directory entry, then we fail the read. 1540 */ 1541 off = offset = uio->uio_offset; 1542 if (uio->uio_resid < sizeof(struct direntry) || 1543 (offset & (sizeof(struct direntry) - 1))) 1544 return (EINVAL); 1545 1546 if (ap->a_ncookies) { 1547 ncookies = uio->uio_resid / 16; 1548 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1549 M_WAITOK); 1550 *ap->a_cookies = cookies; 1551 *ap->a_ncookies = ncookies; 1552 } 1553 1554 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1555 1556 /* 1557 * If they are reading from the root directory then, we simulate 1558 * the . and .. entries since these don't exist in the root 1559 * directory. We also set the offset bias to make up for having to 1560 * simulate these entries. By this I mean that at file offset 64 we 1561 * read the first entry in the root directory that lives on disk. 1562 */ 1563 if (dep->de_StartCluster == MSDOSFSROOT 1564 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1565 #if 0 1566 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1567 offset); 1568 #endif 1569 bias = 2 * sizeof(struct direntry); 1570 if (offset < bias) { 1571 for (n = (int)offset / sizeof(struct direntry); 1572 n < 2; n++) { 1573 if (FAT32(pmp)) 1574 dirbuf.d_fileno = cntobn(pmp, 1575 pmp->pm_rootdirblk) 1576 * dirsperblk; 1577 else 1578 dirbuf.d_fileno = 1; 1579 dirbuf.d_type = DT_DIR; 1580 switch (n) { 1581 case 0: 1582 dirbuf.d_namlen = 1; 1583 strcpy(dirbuf.d_name, "."); 1584 break; 1585 case 1: 1586 dirbuf.d_namlen = 2; 1587 strcpy(dirbuf.d_name, ".."); 1588 break; 1589 } 1590 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1591 if (uio->uio_resid < dirbuf.d_reclen) 1592 goto out; 1593 error = uiomove((caddr_t) &dirbuf, 1594 dirbuf.d_reclen, uio); 1595 if (error) 1596 goto out; 1597 offset += sizeof(struct direntry); 1598 off = offset; 1599 if (cookies) { 1600 *cookies++ = offset; 1601 if (--ncookies <= 0) 1602 goto out; 1603 } 1604 } 1605 } 1606 } 1607 1608 off = offset; 1609 while (uio->uio_resid > 0) { 1610 lbn = de_cluster(pmp, offset - bias); 1611 on = (offset - bias) & pmp->pm_crbomask; 1612 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1613 diff = dep->de_FileSize - (offset - bias); 1614 if (diff <= 0) 1615 break; 1616 n = min(n, diff); 1617 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1618 if (error) 1619 break; 1620 error = bread(pmp->pm_devvp, bn, blsize, &bp); 1621 if (error) { 1622 brelse(bp); 1623 return (error); 1624 } 1625 n = min(n, blsize - bp->b_resid); 1626 1627 /* 1628 * Convert from dos directory entries to fs-independent 1629 * directory entries. 1630 */ 1631 for (dentp = (struct direntry *)(bp->b_data + on); 1632 (char *)dentp < bp->b_data + on + n; 1633 dentp++, offset += sizeof(struct direntry)) { 1634 #if 0 1635 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1636 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1637 #endif 1638 /* 1639 * If this is an unused entry, we can stop. 1640 */ 1641 if (dentp->deName[0] == SLOT_EMPTY) { 1642 brelse(bp); 1643 goto out; 1644 } 1645 /* 1646 * Skip deleted entries. 1647 */ 1648 if (dentp->deName[0] == SLOT_DELETED) { 1649 chksum = -1; 1650 continue; 1651 } 1652 1653 /* 1654 * Handle Win95 long directory entries 1655 */ 1656 if (dentp->deAttributes == ATTR_WIN95) { 1657 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1658 continue; 1659 chksum = win2unixfn((struct winentry *)dentp, 1660 &dirbuf, chksum, 1661 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1662 pmp->pm_u2w); 1663 continue; 1664 } 1665 1666 /* 1667 * Skip volume labels 1668 */ 1669 if (dentp->deAttributes & ATTR_VOLUME) { 1670 chksum = -1; 1671 continue; 1672 } 1673 /* 1674 * This computation of d_fileno must match 1675 * the computation of va_fileid in 1676 * msdosfs_getattr. 1677 */ 1678 if (dentp->deAttributes & ATTR_DIRECTORY) { 1679 fileno = getushort(dentp->deStartCluster); 1680 if (FAT32(pmp)) 1681 fileno |= getushort(dentp->deHighClust) << 16; 1682 /* if this is the root directory */ 1683 if (fileno == MSDOSFSROOT) 1684 if (FAT32(pmp)) 1685 fileno = cntobn(pmp, 1686 pmp->pm_rootdirblk) 1687 * dirsperblk; 1688 else 1689 fileno = 1; 1690 else 1691 fileno = cntobn(pmp, fileno) * dirsperblk; 1692 dirbuf.d_fileno = fileno; 1693 dirbuf.d_type = DT_DIR; 1694 } else { 1695 dirbuf.d_fileno = offset / sizeof(struct direntry); 1696 dirbuf.d_type = DT_REG; 1697 } 1698 if (chksum != winChksum(dentp->deName)) 1699 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1700 (u_char *)dirbuf.d_name, 1701 dentp->deLowerCase | 1702 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1703 (LCASE_BASE | LCASE_EXT) : 0), 1704 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1705 pmp->pm_d2u, 1706 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1707 pmp->pm_ul); 1708 else 1709 dirbuf.d_name[dirbuf.d_namlen] = 0; 1710 chksum = -1; 1711 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1712 if (uio->uio_resid < dirbuf.d_reclen) { 1713 brelse(bp); 1714 goto out; 1715 } 1716 error = uiomove((caddr_t) &dirbuf, 1717 dirbuf.d_reclen, uio); 1718 if (error) { 1719 brelse(bp); 1720 goto out; 1721 } 1722 if (cookies) { 1723 *cookies++ = offset + sizeof(struct direntry); 1724 if (--ncookies <= 0) { 1725 brelse(bp); 1726 goto out; 1727 } 1728 } 1729 off = offset + sizeof(struct direntry); 1730 } 1731 brelse(bp); 1732 } 1733 out: 1734 /* Subtract unused cookies */ 1735 if (ap->a_ncookies) 1736 *ap->a_ncookies -= ncookies; 1737 1738 uio->uio_offset = off; 1739 1740 /* 1741 * Set the eofflag (NFS uses it) 1742 */ 1743 if (ap->a_eofflag) { 1744 if (dep->de_FileSize - (offset - bias) <= 0) 1745 *ap->a_eofflag = 1; 1746 else 1747 *ap->a_eofflag = 0; 1748 } 1749 return (error); 1750 } 1751 1752 /* 1753 * vp - address of vnode file the file 1754 * bn - which cluster we are interested in mapping to a filesystem block number. 1755 * vpp - returns the vnode for the block special file holding the filesystem 1756 * containing the file of interest 1757 * bnp - address of where to return the filesystem relative block number 1758 * 1759 * msdosfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp, 1760 * daddr_t *a_bnp, int *a_runp, int *a_runb) 1761 */ 1762 static int 1763 msdosfs_bmap(struct vop_bmap_args *ap) 1764 { 1765 struct denode *dep = VTODE(ap->a_vp); 1766 1767 if (ap->a_vpp != NULL) 1768 *ap->a_vpp = dep->de_devvp; 1769 if (ap->a_bnp == NULL) 1770 return (0); 1771 if (ap->a_runp) { 1772 /* 1773 * Sequential clusters should be counted here. 1774 */ 1775 *ap->a_runp = 0; 1776 } 1777 if (ap->a_runb) { 1778 *ap->a_runb = 0; 1779 } 1780 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0)); 1781 } 1782 1783 /* 1784 * msdosfs_strategy(struct vnode *a_vp, struct buf *a_bp) 1785 */ 1786 static int 1787 msdosfs_strategy(struct vop_strategy_args *ap) 1788 { 1789 struct buf *bp = ap->a_bp; 1790 struct denode *dep = VTODE(bp->b_vp); 1791 struct vnode *vp; 1792 int error = 0; 1793 1794 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1795 panic("msdosfs_strategy: spec"); 1796 /* 1797 * If we don't already know the filesystem relative block number 1798 * then get it using pcbmap(). If pcbmap() returns the block 1799 * number as -1 then we've got a hole in the file. DOS filesystems 1800 * don't allow files with holes, so we shouldn't ever see this. 1801 */ 1802 if (bp->b_blkno == bp->b_lblkno) { 1803 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0); 1804 if (error) { 1805 bp->b_error = error; 1806 bp->b_flags |= B_ERROR; 1807 biodone(bp); 1808 return (error); 1809 } 1810 if ((long)bp->b_blkno == -1) 1811 vfs_bio_clrbuf(bp); 1812 } 1813 if (bp->b_blkno == -1) { 1814 biodone(bp); 1815 return (0); 1816 } 1817 /* 1818 * Read/write the block from/to the disk that contains the desired 1819 * file block. 1820 */ 1821 vp = dep->de_devvp; 1822 bp->b_dev = vp->v_rdev; 1823 VOP_STRATEGY(vp, bp); 1824 return (0); 1825 } 1826 1827 /* 1828 * msdosfs_print(struct vnode *vp) 1829 */ 1830 static int 1831 msdosfs_print(struct vop_print_args *ap) 1832 { 1833 struct denode *dep = VTODE(ap->a_vp); 1834 1835 printf( 1836 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1837 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1838 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1839 lockmgr_printinfo(&ap->a_vp->v_lock); 1840 printf("\n"); 1841 return (0); 1842 } 1843 1844 /* 1845 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval) 1846 */ 1847 static int 1848 msdosfs_pathconf(struct vop_pathconf_args *ap) 1849 { 1850 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1851 1852 switch (ap->a_name) { 1853 case _PC_LINK_MAX: 1854 *ap->a_retval = 1; 1855 return (0); 1856 case _PC_NAME_MAX: 1857 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1858 return (0); 1859 case _PC_PATH_MAX: 1860 *ap->a_retval = PATH_MAX; 1861 return (0); 1862 case _PC_CHOWN_RESTRICTED: 1863 *ap->a_retval = 1; 1864 return (0); 1865 case _PC_NO_TRUNC: 1866 *ap->a_retval = 0; 1867 return (0); 1868 default: 1869 return (EINVAL); 1870 } 1871 /* NOTREACHED */ 1872 } 1873 1874 /* 1875 * get page routine 1876 * 1877 * XXX By default, wimp out... note that a_offset is ignored (and always 1878 * XXX has been). 1879 */ 1880 int 1881 msdosfs_getpages(struct vop_getpages_args *ap) 1882 { 1883 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1884 ap->a_reqpage); 1885 } 1886 1887 /* 1888 * put page routine 1889 * 1890 * XXX By default, wimp out... note that a_offset is ignored (and always 1891 * XXX has been). 1892 */ 1893 int 1894 msdosfs_putpages(struct vop_putpages_args *ap) 1895 { 1896 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1897 ap->a_sync, ap->a_rtvals); 1898 } 1899 1900 /* Global vfs data structures for msdosfs */ 1901 struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1902 { &vop_default_desc, vop_defaultop }, 1903 { &vop_access_desc, (void *) msdosfs_access }, 1904 { &vop_bmap_desc, (void *) msdosfs_bmap }, 1905 { &vop_cachedlookup_desc, (void *) msdosfs_lookup }, 1906 { &vop_close_desc, (void *) msdosfs_close }, 1907 { &vop_create_desc, (void *) msdosfs_create }, 1908 { &vop_fsync_desc, (void *) msdosfs_fsync }, 1909 { &vop_getattr_desc, (void *) msdosfs_getattr }, 1910 { &vop_inactive_desc, (void *) msdosfs_inactive }, 1911 { &vop_islocked_desc, (void *) vop_stdislocked }, 1912 { &vop_link_desc, (void *) msdosfs_link }, 1913 { &vop_lock_desc, (void *) vop_stdlock }, 1914 { &vop_lookup_desc, (void *) vfs_cache_lookup }, 1915 { &vop_mkdir_desc, (void *) msdosfs_mkdir }, 1916 { &vop_mknod_desc, (void *) msdosfs_mknod }, 1917 { &vop_pathconf_desc, (void *) msdosfs_pathconf }, 1918 { &vop_print_desc, (void *) msdosfs_print }, 1919 { &vop_read_desc, (void *) msdosfs_read }, 1920 { &vop_readdir_desc, (void *) msdosfs_readdir }, 1921 { &vop_reclaim_desc, (void *) msdosfs_reclaim }, 1922 { &vop_remove_desc, (void *) msdosfs_remove }, 1923 { &vop_rename_desc, (void *) msdosfs_rename }, 1924 { &vop_rmdir_desc, (void *) msdosfs_rmdir }, 1925 { &vop_setattr_desc, (void *) msdosfs_setattr }, 1926 { &vop_strategy_desc, (void *) msdosfs_strategy }, 1927 { &vop_symlink_desc, (void *) msdosfs_symlink }, 1928 { &vop_unlock_desc, (void *) vop_stdunlock }, 1929 { &vop_write_desc, (void *) msdosfs_write }, 1930 { &vop_getpages_desc, (void *) msdosfs_getpages }, 1931 { &vop_putpages_desc, (void *) msdosfs_putpages }, 1932 { NULL, NULL } 1933 }; 1934