1 /* $FreeBSD$ */ 2 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 3 4 /*- 5 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 6 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 7 * All rights reserved. 8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by TooLs GmbH. 21 * 4. The name of TooLs GmbH may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /* 36 * Written by Paul Popelka (paulp@uts.amdahl.com) 37 * 38 * You can do anything you want with this software, just don't say you wrote 39 * it, and don't remove this notice. 40 * 41 * This software is provided "as is". 42 * 43 * The author supplies this software to be publicly redistributed on the 44 * understanding that the author is not responsible for the correct 45 * functioning of this software in any circumstances and is not liable for 46 * any damages caused by this software. 47 * 48 * October 1992 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/namei.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/mount.h> 60 #include <sys/unistd.h> 61 #include <sys/vnode.h> 62 #include <sys/malloc.h> 63 #include <sys/dirent.h> 64 #include <sys/signalvar.h> 65 66 #include <vm/vm.h> 67 #include <vm/vm_extern.h> 68 #include <vm/vm_zone.h> 69 #include <vm/vnode_pager.h> 70 71 #include <msdosfs/bpb.h> 72 #include <msdosfs/direntry.h> 73 #include <msdosfs/denode.h> 74 #include <msdosfs/msdosfsmount.h> 75 #include <msdosfs/fat.h> 76 77 /* 78 * Prototypes for MSDOSFS vnode operations 79 */ 80 static int msdosfs_create __P((struct vop_create_args *)); 81 static int msdosfs_mknod __P((struct vop_mknod_args *)); 82 static int msdosfs_close __P((struct vop_close_args *)); 83 static int msdosfs_access __P((struct vop_access_args *)); 84 static int msdosfs_getattr __P((struct vop_getattr_args *)); 85 static int msdosfs_setattr __P((struct vop_setattr_args *)); 86 static int msdosfs_read __P((struct vop_read_args *)); 87 static int msdosfs_write __P((struct vop_write_args *)); 88 static int msdosfs_fsync __P((struct vop_fsync_args *)); 89 static int msdosfs_remove __P((struct vop_remove_args *)); 90 static int msdosfs_link __P((struct vop_link_args *)); 91 static int msdosfs_rename __P((struct vop_rename_args *)); 92 static int msdosfs_mkdir __P((struct vop_mkdir_args *)); 93 static int msdosfs_rmdir __P((struct vop_rmdir_args *)); 94 static int msdosfs_symlink __P((struct vop_symlink_args *)); 95 static int msdosfs_readdir __P((struct vop_readdir_args *)); 96 static int msdosfs_bmap __P((struct vop_bmap_args *)); 97 static int msdosfs_strategy __P((struct vop_strategy_args *)); 98 static int msdosfs_print __P((struct vop_print_args *)); 99 static int msdosfs_pathconf __P((struct vop_pathconf_args *ap)); 100 static int msdosfs_getpages __P((struct vop_getpages_args *)); 101 static int msdosfs_putpages __P((struct vop_putpages_args *)); 102 103 /* 104 * Some general notes: 105 * 106 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 107 * read/written using the vnode for the filesystem. Blocks that represent 108 * the contents of a file are read/written using the vnode for the file 109 * (including directories when they are read/written as files). This 110 * presents problems for the dos filesystem because data that should be in 111 * an inode (if dos had them) resides in the directory itself. Since we 112 * must update directory entries without the benefit of having the vnode 113 * for the directory we must use the vnode for the filesystem. This means 114 * that when a directory is actually read/written (via read, write, or 115 * readdir, or seek) we must use the vnode for the filesystem instead of 116 * the vnode for the directory as would happen in ufs. This is to insure we 117 * retreive the correct block from the buffer cache since the hash value is 118 * based upon the vnode address and the desired block number. 119 */ 120 121 /* 122 * Create a regular file. On entry the directory to contain the file being 123 * created is locked. We must release before we return. We must also free 124 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 125 * only if the SAVESTART bit in cn_flags is clear on success. 126 */ 127 static int 128 msdosfs_create(ap) 129 struct vop_create_args /* { 130 struct vnode *a_dvp; 131 struct vnode **a_vpp; 132 struct componentname *a_cnp; 133 struct vattr *a_vap; 134 } */ *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 printf("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 #ifdef DIAGNOSTIC 165 if ((cnp->cn_flags & HASBUF) == 0) 166 panic("msdosfs_create: no name"); 167 #endif 168 bzero(&ndirent, sizeof(ndirent)); 169 error = uniqdosname(pdep, cnp, ndirent.de_Name); 170 if (error) 171 goto bad; 172 173 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 174 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 175 ndirent.de_LowerCase = 0; 176 ndirent.de_StartCluster = 0; 177 ndirent.de_FileSize = 0; 178 ndirent.de_dev = pdep->de_dev; 179 ndirent.de_devvp = pdep->de_devvp; 180 ndirent.de_pmp = pdep->de_pmp; 181 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 182 getnanotime(&ts); 183 DETIMES(&ndirent, &ts, &ts, &ts); 184 error = createde(&ndirent, pdep, &dep, cnp); 185 if (error) 186 goto bad; 187 *ap->a_vpp = DETOV(dep); 188 return (0); 189 190 bad: 191 return (error); 192 } 193 194 static int 195 msdosfs_mknod(ap) 196 struct vop_mknod_args /* { 197 struct vnode *a_dvp; 198 struct vnode **a_vpp; 199 struct componentname *a_cnp; 200 struct vattr *a_vap; 201 } */ *ap; 202 { 203 204 switch (ap->a_vap->va_type) { 205 case VDIR: 206 return (msdosfs_mkdir((struct vop_mkdir_args *)ap)); 207 break; 208 209 case VREG: 210 return (msdosfs_create((struct vop_create_args *)ap)); 211 break; 212 213 default: 214 return (EINVAL); 215 } 216 /* NOTREACHED */ 217 } 218 219 static int 220 msdosfs_close(ap) 221 struct vop_close_args /* { 222 struct vnode *a_vp; 223 int a_fflag; 224 struct ucred *a_cred; 225 struct proc *a_p; 226 } */ *ap; 227 { 228 struct vnode *vp = ap->a_vp; 229 struct denode *dep = VTODE(vp); 230 struct timespec ts; 231 232 simple_lock(&vp->v_interlock); 233 if (vp->v_usecount > 1) { 234 getnanotime(&ts); 235 DETIMES(dep, &ts, &ts, &ts); 236 } 237 simple_unlock(&vp->v_interlock); 238 return 0; 239 } 240 241 static int 242 msdosfs_access(ap) 243 struct vop_access_args /* { 244 struct vnode *a_vp; 245 int a_mode; 246 struct ucred *a_cred; 247 struct proc *a_p; 248 } */ *ap; 249 { 250 struct vnode *vp = ap->a_vp; 251 struct denode *dep = VTODE(ap->a_vp); 252 struct msdosfsmount *pmp = dep->de_pmp; 253 struct ucred *cred = ap->a_cred; 254 mode_t mask, file_mode, mode = ap->a_mode; 255 register gid_t *gp; 256 int i; 257 258 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 259 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 260 file_mode &= pmp->pm_mask; 261 262 /* 263 * Disallow write attempts on read-only file systems; 264 * unless the file is a socket, fifo, or a block or 265 * character device resident on the file system. 266 */ 267 if (mode & VWRITE) { 268 switch (vp->v_type) { 269 case VDIR: 270 case VLNK: 271 case VREG: 272 if (vp->v_mount->mnt_flag & MNT_RDONLY) 273 return (EROFS); 274 break; 275 default: 276 break; 277 } 278 } 279 280 /* User id 0 always gets access. */ 281 if (cred->cr_uid == 0) 282 return 0; 283 284 mask = 0; 285 286 /* Otherwise, check the owner. */ 287 if (cred->cr_uid == pmp->pm_uid) { 288 if (mode & VEXEC) 289 mask |= S_IXUSR; 290 if (mode & VREAD) 291 mask |= S_IRUSR; 292 if (mode & VWRITE) 293 mask |= S_IWUSR; 294 return (file_mode & mask) == mask ? 0 : EACCES; 295 } 296 297 /* Otherwise, check the groups. */ 298 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 299 if (pmp->pm_gid == *gp) { 300 if (mode & VEXEC) 301 mask |= S_IXGRP; 302 if (mode & VREAD) 303 mask |= S_IRGRP; 304 if (mode & VWRITE) 305 mask |= S_IWGRP; 306 return (file_mode & mask) == mask ? 0 : EACCES; 307 } 308 309 /* Otherwise, check everyone else. */ 310 if (mode & VEXEC) 311 mask |= S_IXOTH; 312 if (mode & VREAD) 313 mask |= S_IROTH; 314 if (mode & VWRITE) 315 mask |= S_IWOTH; 316 return (file_mode & mask) == mask ? 0 : EACCES; 317 } 318 319 static int 320 msdosfs_getattr(ap) 321 struct vop_getattr_args /* { 322 struct vnode *a_vp; 323 struct vattr *a_vap; 324 struct ucred *a_cred; 325 struct proc *a_p; 326 } */ *ap; 327 { 328 struct denode *dep = VTODE(ap->a_vp); 329 struct msdosfsmount *pmp = dep->de_pmp; 330 struct vattr *vap = ap->a_vap; 331 mode_t mode; 332 struct timespec ts; 333 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 334 u_long fileid; 335 336 getnanotime(&ts); 337 DETIMES(dep, &ts, &ts, &ts); 338 vap->va_fsid = dev2udev(dep->de_dev); 339 /* 340 * The following computation of the fileid must be the same as that 341 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 342 * doesn't work. 343 */ 344 if (dep->de_Attributes & ATTR_DIRECTORY) { 345 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk; 346 if (dep->de_StartCluster == MSDOSFSROOT) 347 fileid = 1; 348 } else { 349 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk; 350 if (dep->de_dirclust == MSDOSFSROOT) 351 fileid = roottobn(pmp, 0) * dirsperblk; 352 fileid += dep->de_diroffset / sizeof(struct direntry); 353 } 354 vap->va_fileid = fileid; 355 if ((dep->de_Attributes & ATTR_READONLY) == 0) 356 mode = S_IRWXU|S_IRWXG|S_IRWXO; 357 else 358 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 359 vap->va_mode = mode & pmp->pm_mask; 360 vap->va_uid = pmp->pm_uid; 361 vap->va_gid = pmp->pm_gid; 362 vap->va_nlink = 1; 363 vap->va_rdev = 0; 364 vap->va_size = dep->de_FileSize; 365 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 366 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 367 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 368 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 369 } else { 370 vap->va_atime = vap->va_mtime; 371 vap->va_ctime = vap->va_mtime; 372 } 373 vap->va_flags = 0; 374 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 375 vap->va_flags |= SF_ARCHIVED; 376 vap->va_gen = 0; 377 vap->va_blocksize = pmp->pm_bpcluster; 378 vap->va_bytes = 379 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 380 vap->va_type = ap->a_vp->v_type; 381 vap->va_filerev = dep->de_modrev; 382 return (0); 383 } 384 385 static int 386 msdosfs_setattr(ap) 387 struct vop_setattr_args /* { 388 struct vnode *a_vp; 389 struct vattr *a_vap; 390 struct ucred *a_cred; 391 struct proc *a_p; 392 } */ *ap; 393 { 394 struct vnode *vp = ap->a_vp; 395 struct denode *dep = VTODE(ap->a_vp); 396 struct msdosfsmount *pmp = dep->de_pmp; 397 struct vattr *vap = ap->a_vap; 398 struct ucred *cred = ap->a_cred; 399 int error = 0; 400 401 #ifdef MSDOSFS_DEBUG 402 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 403 ap->a_vp, vap, cred, ap->a_p); 404 #endif 405 406 /* 407 * Check for unsettable attributes. 408 */ 409 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 410 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 411 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 412 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 413 #ifdef MSDOSFS_DEBUG 414 printf("msdosfs_setattr(): returning EINVAL\n"); 415 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 416 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 417 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 418 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 419 printf(" va_uid %x, va_gid %x\n", 420 vap->va_uid, vap->va_gid); 421 #endif 422 return (EINVAL); 423 } 424 if (vap->va_flags != VNOVAL) { 425 if (vp->v_mount->mnt_flag & MNT_RDONLY) 426 return (EROFS); 427 if (cred->cr_uid != pmp->pm_uid && 428 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT))) 429 return (error); 430 /* 431 * We are very inconsistent about handling unsupported 432 * attributes. We ignored the access time and the 433 * read and execute bits. We were strict for the other 434 * attributes. 435 * 436 * Here we are strict, stricter than ufs in not allowing 437 * users to attempt to set SF_SETTABLE bits or anyone to 438 * set unsupported bits. However, we ignore attempts to 439 * set ATTR_ARCHIVE for directories `cp -pr' from a more 440 * sensible file system attempts it a lot. 441 */ 442 if (cred->cr_uid != 0) { 443 if (vap->va_flags & SF_SETTABLE) 444 return EPERM; 445 } 446 if (vap->va_flags & ~SF_ARCHIVED) 447 return EOPNOTSUPP; 448 if (vap->va_flags & SF_ARCHIVED) 449 dep->de_Attributes &= ~ATTR_ARCHIVE; 450 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 451 dep->de_Attributes |= ATTR_ARCHIVE; 452 dep->de_flag |= DE_MODIFIED; 453 } 454 455 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 456 uid_t uid; 457 gid_t gid; 458 459 if (vp->v_mount->mnt_flag & MNT_RDONLY) 460 return (EROFS); 461 uid = vap->va_uid; 462 if (uid == (uid_t)VNOVAL) 463 uid = pmp->pm_uid; 464 gid = vap->va_gid; 465 if (gid == (gid_t)VNOVAL) 466 gid = pmp->pm_gid; 467 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 468 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 469 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT))) 470 return error; 471 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 472 return EINVAL; 473 } 474 475 if (vap->va_size != VNOVAL) { 476 /* 477 * Disallow write attempts on read-only file systems; 478 * unless the file is a socket, fifo, or a block or 479 * character device resident on the file system. 480 */ 481 switch (vp->v_type) { 482 case VDIR: 483 return (EISDIR); 484 /* NOT REACHED */ 485 case VLNK: 486 case VREG: 487 if (vp->v_mount->mnt_flag & MNT_RDONLY) 488 return (EROFS); 489 break; 490 default: 491 break; 492 } 493 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 494 if (error) 495 return error; 496 } 497 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 498 if (vp->v_mount->mnt_flag & MNT_RDONLY) 499 return (EROFS); 500 if (cred->cr_uid != pmp->pm_uid && 501 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)) && 502 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 503 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_p)))) 504 return (error); 505 if (vp->v_type != VDIR) { 506 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 507 vap->va_atime.tv_sec != VNOVAL) 508 unix2dostime(&vap->va_atime, &dep->de_ADate, NULL, NULL); 509 if (vap->va_mtime.tv_sec != VNOVAL) 510 unix2dostime(&vap->va_mtime, &dep->de_MDate, &dep->de_MTime, NULL); 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_xxx(cred, ap->a_p, 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_flag |= DE_MODIFIED; 533 } 534 } 535 return (deupdat(dep, 1)); 536 } 537 538 static int 539 msdosfs_read(ap) 540 struct vop_read_args /* { 541 struct vnode *a_vp; 542 struct uio *a_uio; 543 int a_ioflag; 544 struct ucred *a_cred; 545 } */ *ap; 546 { 547 int error = 0; 548 off_t diff; 549 int blsize; 550 int isadir; 551 int orig_resid; 552 long n; 553 long on; 554 daddr_t lbn; 555 daddr_t rablock; 556 int rasize; 557 int seqcount; 558 struct buf *bp; 559 struct vnode *vp = ap->a_vp; 560 struct denode *dep = VTODE(vp); 561 struct msdosfsmount *pmp = dep->de_pmp; 562 struct uio *uio = ap->a_uio; 563 564 if (uio->uio_offset < 0) 565 return (EINVAL); 566 567 /* 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 >> 16; 575 576 isadir = dep->de_Attributes & ATTR_DIRECTORY; 577 do { 578 if (uio->uio_offset >= dep->de_FileSize) 579 break; 580 lbn = de_cluster(pmp, uio->uio_offset); 581 on = uio->uio_offset & pmp->pm_crbomask; 582 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 583 diff = dep->de_FileSize - uio->uio_offset; 584 if (diff < n) 585 n = diff; 586 /* convert cluster # to block # if a directory */ 587 if (isadir) { 588 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 589 if (error) 590 break; 591 } 592 /* 593 * If we are operating on a directory file then be sure to 594 * do i/o with the vnode for the filesystem instead of the 595 * vnode for the directory. 596 */ 597 if (isadir) { 598 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 599 } else { 600 rablock = lbn + 1; 601 if (seqcount > 1 && 602 de_cn2off(pmp, rablock) < dep->de_FileSize) { 603 rasize = pmp->pm_bpcluster; 604 error = breadn(vp, lbn, pmp->pm_bpcluster, 605 &rablock, &rasize, 1, NOCRED, &bp); 606 } else { 607 error = bread(vp, lbn, pmp->pm_bpcluster, 608 NOCRED, &bp); 609 } 610 } 611 n = min(n, pmp->pm_bpcluster - bp->b_resid); 612 if (error) { 613 brelse(bp); 614 break; 615 } 616 error = uiomove(bp->b_data + on, (int) n, uio); 617 brelse(bp); 618 } while (error == 0 && uio->uio_resid > 0 && n != 0); 619 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 620 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 621 dep->de_flag |= DE_ACCESS; 622 return (error); 623 } 624 625 /* 626 * Write data to a file or directory. 627 */ 628 static int 629 msdosfs_write(ap) 630 struct vop_write_args /* { 631 struct vnode *a_vp; 632 struct uio *a_uio; 633 int a_ioflag; 634 struct ucred *a_cred; 635 } */ *ap; 636 { 637 int n; 638 int croffset; 639 int resid; 640 u_long osize; 641 int error = 0; 642 u_long count; 643 daddr_t bn, lastcn; 644 struct buf *bp; 645 int ioflag = ap->a_ioflag; 646 struct uio *uio = ap->a_uio; 647 struct proc *p = uio->uio_procp; 648 struct vnode *vp = ap->a_vp; 649 struct vnode *thisvp; 650 struct denode *dep = VTODE(vp); 651 struct msdosfsmount *pmp = dep->de_pmp; 652 struct ucred *cred = ap->a_cred; 653 654 #ifdef MSDOSFS_DEBUG 655 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 656 vp, uio, ioflag, cred); 657 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 658 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 659 #endif 660 661 switch (vp->v_type) { 662 case VREG: 663 if (ioflag & IO_APPEND) 664 uio->uio_offset = dep->de_FileSize; 665 thisvp = vp; 666 break; 667 case VDIR: 668 return EISDIR; 669 default: 670 panic("msdosfs_write(): bad file type"); 671 } 672 673 if (uio->uio_offset < 0) 674 return (EINVAL); 675 676 if (uio->uio_resid == 0) 677 return (0); 678 679 /* 680 * If they've exceeded their filesize limit, tell them about it. 681 */ 682 if (p && 683 ((uio->uio_offset + uio->uio_resid) > 684 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 685 psignal(p, SIGXFSZ); 686 return (EFBIG); 687 } 688 689 /* 690 * If the offset we are starting the write at is beyond the end of 691 * the file, then they've done a seek. Unix filesystems allow 692 * files with holes in them, DOS doesn't so we must fill the hole 693 * with zeroed blocks. 694 */ 695 if (uio->uio_offset > dep->de_FileSize) { 696 error = deextend(dep, uio->uio_offset, cred); 697 if (error) 698 return (error); 699 } 700 701 /* 702 * Remember some values in case the write fails. 703 */ 704 resid = uio->uio_resid; 705 osize = dep->de_FileSize; 706 707 /* 708 * If we write beyond the end of the file, extend it to its ultimate 709 * size ahead of the time to hopefully get a contiguous area. 710 */ 711 if (uio->uio_offset + resid > osize) { 712 count = de_clcount(pmp, uio->uio_offset + resid) - 713 de_clcount(pmp, osize); 714 error = extendfile(dep, count, NULL, NULL, 0); 715 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 716 goto errexit; 717 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 718 } else 719 lastcn = de_clcount(pmp, osize) - 1; 720 721 do { 722 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 723 error = ENOSPC; 724 break; 725 } 726 727 croffset = uio->uio_offset & pmp->pm_crbomask; 728 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 729 if (uio->uio_offset + n > dep->de_FileSize) { 730 dep->de_FileSize = uio->uio_offset + n; 731 /* The object size needs to be set before buffer is allocated */ 732 vnode_pager_setsize(vp, dep->de_FileSize); 733 } 734 735 bn = de_cluster(pmp, uio->uio_offset); 736 if ((uio->uio_offset & pmp->pm_crbomask) == 0 737 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 738 > de_cluster(pmp, uio->uio_offset) 739 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 740 /* 741 * If either the whole cluster gets written, 742 * or we write the cluster from its start beyond EOF, 743 * then no need to read data from disk. 744 */ 745 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 746 clrbuf(bp); 747 /* 748 * Do the bmap now, since pcbmap needs buffers 749 * for the fat table. (see msdosfs_strategy) 750 */ 751 if (bp->b_blkno == bp->b_lblkno) { 752 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 753 0, 0); 754 if (error) 755 bp->b_blkno = -1; 756 } 757 if (bp->b_blkno == -1) { 758 brelse(bp); 759 if (!error) 760 error = EIO; /* XXX */ 761 break; 762 } 763 } else { 764 /* 765 * The block we need to write into exists, so read it in. 766 */ 767 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 768 if (error) { 769 brelse(bp); 770 break; 771 } 772 } 773 774 /* 775 * Should these vnode_pager_* functions be done on dir 776 * files? 777 */ 778 779 /* 780 * Copy the data from user space into the buf header. 781 */ 782 error = uiomove(bp->b_data + croffset, n, uio); 783 if (error) { 784 brelse(bp); 785 break; 786 } 787 788 /* 789 * If they want this synchronous then write it and wait for 790 * it. Otherwise, if on a cluster boundary write it 791 * asynchronously so we can move on to the next block 792 * without delay. Otherwise do a delayed write because we 793 * may want to write somemore into the block later. 794 */ 795 if (ioflag & IO_SYNC) 796 (void) bwrite(bp); 797 else if (n + croffset == pmp->pm_bpcluster) 798 bawrite(bp); 799 else 800 bdwrite(bp); 801 dep->de_flag |= DE_UPDATE; 802 } while (error == 0 && uio->uio_resid > 0); 803 804 /* 805 * If the write failed and they want us to, truncate the file back 806 * to the size it was before the write was attempted. 807 */ 808 errexit: 809 if (error) { 810 if (ioflag & IO_UNIT) { 811 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 812 uio->uio_offset -= resid - uio->uio_resid; 813 uio->uio_resid = resid; 814 } else { 815 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 816 if (uio->uio_resid != resid) 817 error = 0; 818 } 819 } else if (ioflag & IO_SYNC) 820 error = deupdat(dep, 1); 821 return (error); 822 } 823 824 /* 825 * Flush the blocks of a file to disk. 826 * 827 * This function is worthless for vnodes that represent directories. Maybe we 828 * could just do a sync if they try an fsync on a directory file. 829 */ 830 static int 831 msdosfs_fsync(ap) 832 struct vop_fsync_args /* { 833 struct vnode *a_vp; 834 struct ucred *a_cred; 835 int a_waitfor; 836 struct proc *a_p; 837 } */ *ap; 838 { 839 struct vnode *vp = ap->a_vp; 840 int s; 841 struct buf *bp, *nbp; 842 843 /* 844 * Flush all dirty buffers associated with a vnode. 845 */ 846 loop: 847 s = splbio(); 848 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 849 nbp = TAILQ_NEXT(bp, b_vnbufs); 850 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) 851 continue; 852 if ((bp->b_flags & B_DELWRI) == 0) 853 panic("msdosfs_fsync: not dirty"); 854 bremfree(bp); 855 splx(s); 856 (void) bwrite(bp); 857 goto loop; 858 } 859 while (vp->v_numoutput) { 860 vp->v_flag |= VBWAIT; 861 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 862 } 863 #ifdef DIAGNOSTIC 864 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) { 865 vprint("msdosfs_fsync: dirty", vp); 866 goto loop; 867 } 868 #endif 869 splx(s); 870 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 871 } 872 873 static int 874 msdosfs_remove(ap) 875 struct vop_remove_args /* { 876 struct vnode *a_dvp; 877 struct vnode *a_vp; 878 struct componentname *a_cnp; 879 } */ *ap; 880 { 881 struct denode *dep = VTODE(ap->a_vp); 882 struct denode *ddep = VTODE(ap->a_dvp); 883 int error; 884 885 if (ap->a_vp->v_type == VDIR) 886 error = EPERM; 887 else 888 error = removede(ddep, dep); 889 #ifdef MSDOSFS_DEBUG 890 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 891 #endif 892 return (error); 893 } 894 895 /* 896 * DOS filesystems don't know what links are. But since we already called 897 * msdosfs_lookup() with create and lockparent, the parent is locked so we 898 * have to free it before we return the error. 899 */ 900 static int 901 msdosfs_link(ap) 902 struct vop_link_args /* { 903 struct vnode *a_tdvp; 904 struct vnode *a_vp; 905 struct componentname *a_cnp; 906 } */ *ap; 907 { 908 return (EOPNOTSUPP); 909 } 910 911 /* 912 * Renames on files require moving the denode to a new hash queue since the 913 * denode's location is used to compute which hash queue to put the file 914 * in. Unless it is a rename in place. For example "mv a b". 915 * 916 * What follows is the basic algorithm: 917 * 918 * if (file move) { 919 * if (dest file exists) { 920 * remove dest file 921 * } 922 * if (dest and src in same directory) { 923 * rewrite name in existing directory slot 924 * } else { 925 * write new entry in dest directory 926 * update offset and dirclust in denode 927 * move denode to new hash chain 928 * clear old directory entry 929 * } 930 * } else { 931 * directory move 932 * if (dest directory exists) { 933 * if (dest is not empty) { 934 * return ENOTEMPTY 935 * } 936 * remove dest directory 937 * } 938 * if (dest and src in same directory) { 939 * rewrite name in existing entry 940 * } else { 941 * be sure dest is not a child of src directory 942 * write entry in dest directory 943 * update "." and ".." in moved directory 944 * clear old directory entry for moved directory 945 * } 946 * } 947 * 948 * On entry: 949 * source's parent directory is unlocked 950 * source file or directory is unlocked 951 * destination's parent directory is locked 952 * destination file or directory is locked if it exists 953 * 954 * On exit: 955 * all denodes should be released 956 * 957 * Notes: 958 * I'm not sure how the memory containing the pathnames pointed at by the 959 * componentname structures is freed, there may be some memory bleeding 960 * for each rename done. 961 */ 962 static int 963 msdosfs_rename(ap) 964 struct vop_rename_args /* { 965 struct vnode *a_fdvp; 966 struct vnode *a_fvp; 967 struct componentname *a_fcnp; 968 struct vnode *a_tdvp; 969 struct vnode *a_tvp; 970 struct componentname *a_tcnp; 971 } */ *ap; 972 { 973 struct vnode *tdvp = ap->a_tdvp; 974 struct vnode *fvp = ap->a_fvp; 975 struct vnode *fdvp = ap->a_fdvp; 976 struct vnode *tvp = ap->a_tvp; 977 struct componentname *tcnp = ap->a_tcnp; 978 struct componentname *fcnp = ap->a_fcnp; 979 struct proc *p = fcnp->cn_proc; 980 struct denode *ip, *xp, *dp, *zp; 981 u_char toname[11], oldname[11]; 982 u_long from_diroffset, to_diroffset; 983 u_char to_count; 984 int doingdirectory = 0, newparent = 0; 985 int error; 986 u_long cn; 987 daddr_t bn; 988 struct denode *fddep; /* from file's parent directory */ 989 struct denode *fdep; /* from file or directory */ 990 struct denode *tddep; /* to file's parent directory */ 991 struct denode *tdep; /* to file or directory */ 992 struct msdosfsmount *pmp; 993 struct direntry *dotdotp; 994 struct buf *bp; 995 996 fddep = VTODE(ap->a_fdvp); 997 fdep = VTODE(ap->a_fvp); 998 tddep = VTODE(ap->a_tdvp); 999 tdep = tvp ? VTODE(tvp) : NULL; 1000 pmp = fddep->de_pmp; 1001 1002 pmp = VFSTOMSDOSFS(fdvp->v_mount); 1003 1004 #ifdef DIAGNOSTIC 1005 if ((tcnp->cn_flags & HASBUF) == 0 || 1006 (fcnp->cn_flags & HASBUF) == 0) 1007 panic("msdosfs_rename: no name"); 1008 #endif 1009 /* 1010 * Check for cross-device rename. 1011 */ 1012 if ((fvp->v_mount != tdvp->v_mount) || 1013 (tvp && (fvp->v_mount != tvp->v_mount))) { 1014 error = EXDEV; 1015 abortit: 1016 if (tdvp == tvp) 1017 vrele(tdvp); 1018 else 1019 vput(tdvp); 1020 if (tvp) 1021 vput(tvp); 1022 vrele(fdvp); 1023 vrele(fvp); 1024 return (error); 1025 } 1026 1027 /* 1028 * If source and dest are the same, do nothing. 1029 */ 1030 if (tvp == fvp) { 1031 error = 0; 1032 goto abortit; 1033 } 1034 1035 error = vn_lock(fvp, LK_EXCLUSIVE, p); 1036 if (error) 1037 goto abortit; 1038 dp = VTODE(fdvp); 1039 ip = VTODE(fvp); 1040 1041 /* 1042 * Be sure we are not renaming ".", "..", or an alias of ".". This 1043 * leads to a crippled directory tree. It's pretty tough to do a 1044 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1045 * doesn't work if the ".." entry is missing. 1046 */ 1047 if (ip->de_Attributes & ATTR_DIRECTORY) { 1048 /* 1049 * Avoid ".", "..", and aliases of "." for obvious reasons. 1050 */ 1051 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1052 dp == ip || 1053 (fcnp->cn_flags & ISDOTDOT) || 1054 (tcnp->cn_flags & ISDOTDOT) || 1055 (ip->de_flag & DE_RENAME)) { 1056 VOP_UNLOCK(fvp, 0, p); 1057 error = EINVAL; 1058 goto abortit; 1059 } 1060 ip->de_flag |= DE_RENAME; 1061 doingdirectory++; 1062 } 1063 1064 /* 1065 * When the target exists, both the directory 1066 * and target vnodes are returned locked. 1067 */ 1068 dp = VTODE(tdvp); 1069 xp = tvp ? VTODE(tvp) : NULL; 1070 /* 1071 * Remember direntry place to use for destination 1072 */ 1073 to_diroffset = dp->de_fndoffset; 1074 to_count = dp->de_fndcnt; 1075 1076 /* 1077 * If ".." must be changed (ie the directory gets a new 1078 * parent) then the source directory must not be in the 1079 * directory heirarchy above the target, as this would 1080 * orphan everything below the source directory. Also 1081 * the user must have write permission in the source so 1082 * as to be able to change "..". We must repeat the call 1083 * to namei, as the parent directory is unlocked by the 1084 * call to doscheckpath(). 1085 */ 1086 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 1087 VOP_UNLOCK(fvp, 0, p); 1088 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1089 newparent = 1; 1090 vrele(fdvp); 1091 if (doingdirectory && newparent) { 1092 if (error) /* write access check above */ 1093 goto bad; 1094 if (xp != NULL) 1095 vput(tvp); 1096 /* 1097 * doscheckpath() vput()'s dp, 1098 * so we have to do a relookup afterwards 1099 */ 1100 error = doscheckpath(ip, dp); 1101 if (error) 1102 goto out; 1103 if ((tcnp->cn_flags & SAVESTART) == 0) 1104 panic("msdosfs_rename: lost to startdir"); 1105 error = relookup(tdvp, &tvp, tcnp); 1106 if (error) 1107 goto out; 1108 dp = VTODE(tdvp); 1109 xp = tvp ? VTODE(tvp) : NULL; 1110 } 1111 1112 if (xp != NULL) { 1113 /* 1114 * Target must be empty if a directory and have no links 1115 * to it. Also, ensure source and target are compatible 1116 * (both directories, or both not directories). 1117 */ 1118 if (xp->de_Attributes & ATTR_DIRECTORY) { 1119 if (!dosdirempty(xp)) { 1120 error = ENOTEMPTY; 1121 goto bad; 1122 } 1123 if (!doingdirectory) { 1124 error = ENOTDIR; 1125 goto bad; 1126 } 1127 cache_purge(tdvp); 1128 } else if (doingdirectory) { 1129 error = EISDIR; 1130 goto bad; 1131 } 1132 error = removede(dp, xp); 1133 if (error) 1134 goto bad; 1135 vput(tvp); 1136 xp = NULL; 1137 } 1138 1139 /* 1140 * Convert the filename in tcnp into a dos filename. We copy this 1141 * into the denode and directory entry for the destination 1142 * file/directory. 1143 */ 1144 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1145 if (error) 1146 goto abortit; 1147 1148 /* 1149 * Since from wasn't locked at various places above, 1150 * have to do a relookup here. 1151 */ 1152 fcnp->cn_flags &= ~MODMASK; 1153 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1154 if ((fcnp->cn_flags & SAVESTART) == 0) 1155 panic("msdosfs_rename: lost from startdir"); 1156 if (!newparent) 1157 VOP_UNLOCK(tdvp, 0, p); 1158 (void) relookup(fdvp, &fvp, fcnp); 1159 if (fvp == NULL) { 1160 /* 1161 * From name has disappeared. 1162 */ 1163 if (doingdirectory) 1164 panic("rename: lost dir entry"); 1165 vrele(ap->a_fvp); 1166 if (newparent) 1167 VOP_UNLOCK(tdvp, 0, p); 1168 vrele(tdvp); 1169 return 0; 1170 } 1171 xp = VTODE(fvp); 1172 zp = VTODE(fdvp); 1173 from_diroffset = zp->de_fndoffset; 1174 1175 /* 1176 * Ensure that the directory entry still exists and has not 1177 * changed till now. If the source is a file the entry may 1178 * have been unlinked or renamed. In either case there is 1179 * no further work to be done. If the source is a directory 1180 * then it cannot have been rmdir'ed or renamed; this is 1181 * prohibited by the DE_RENAME flag. 1182 */ 1183 if (xp != ip) { 1184 if (doingdirectory) 1185 panic("rename: lost dir entry"); 1186 vrele(ap->a_fvp); 1187 VOP_UNLOCK(fvp, 0, p); 1188 if (newparent) 1189 VOP_UNLOCK(fdvp, 0, p); 1190 xp = NULL; 1191 } else { 1192 vrele(fvp); 1193 xp = NULL; 1194 1195 /* 1196 * First write a new entry in the destination 1197 * directory and mark the entry in the source directory 1198 * as deleted. Then move the denode to the correct hash 1199 * chain for its new location in the filesystem. And, if 1200 * we moved a directory, then update its .. entry to point 1201 * to the new parent directory. 1202 */ 1203 bcopy(ip->de_Name, oldname, 11); 1204 bcopy(toname, ip->de_Name, 11); /* update denode */ 1205 dp->de_fndoffset = to_diroffset; 1206 dp->de_fndcnt = to_count; 1207 error = createde(ip, dp, (struct denode **)0, tcnp); 1208 if (error) { 1209 bcopy(oldname, ip->de_Name, 11); 1210 if (newparent) 1211 VOP_UNLOCK(fdvp, 0, p); 1212 VOP_UNLOCK(fvp, 0, p); 1213 goto bad; 1214 } 1215 ip->de_refcnt++; 1216 zp->de_fndoffset = from_diroffset; 1217 error = removede(zp, ip); 1218 if (error) { 1219 /* XXX should really panic here, fs is corrupt */ 1220 if (newparent) 1221 VOP_UNLOCK(fdvp, 0, p); 1222 VOP_UNLOCK(fvp, 0, p); 1223 goto bad; 1224 } 1225 if (!doingdirectory) { 1226 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1227 &ip->de_dirclust, 0); 1228 if (error) { 1229 /* XXX should really panic here, fs is corrupt */ 1230 if (newparent) 1231 VOP_UNLOCK(fdvp, 0, p); 1232 VOP_UNLOCK(fvp, 0, p); 1233 goto bad; 1234 } 1235 if (ip->de_dirclust == MSDOSFSROOT) 1236 ip->de_diroffset = to_diroffset; 1237 else 1238 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1239 } 1240 reinsert(ip); 1241 if (newparent) 1242 VOP_UNLOCK(fdvp, 0, p); 1243 } 1244 1245 /* 1246 * If we moved a directory to a new parent directory, then we must 1247 * fixup the ".." entry in the moved directory. 1248 */ 1249 if (doingdirectory && newparent) { 1250 cn = ip->de_StartCluster; 1251 if (cn == MSDOSFSROOT) { 1252 /* this should never happen */ 1253 panic("msdosfs_rename(): updating .. in root directory?"); 1254 } else 1255 bn = cntobn(pmp, cn); 1256 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1257 NOCRED, &bp); 1258 if (error) { 1259 /* XXX should really panic here, fs is corrupt */ 1260 brelse(bp); 1261 VOP_UNLOCK(fvp, 0, p); 1262 goto bad; 1263 } 1264 dotdotp = (struct direntry *)bp->b_data + 1; 1265 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1266 if (FAT32(pmp)) 1267 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1268 error = bwrite(bp); 1269 if (error) { 1270 /* XXX should really panic here, fs is corrupt */ 1271 VOP_UNLOCK(fvp, 0, p); 1272 goto bad; 1273 } 1274 } 1275 1276 VOP_UNLOCK(fvp, 0, p); 1277 bad: 1278 if (xp) 1279 vput(tvp); 1280 vput(tdvp); 1281 out: 1282 ip->de_flag &= ~DE_RENAME; 1283 vrele(fdvp); 1284 vrele(fvp); 1285 return (error); 1286 1287 } 1288 1289 static struct { 1290 struct direntry dot; 1291 struct direntry dotdot; 1292 } dosdirtemplate = { 1293 { ". ", " ", /* the . entry */ 1294 ATTR_DIRECTORY, /* file attribute */ 1295 0, /* reserved */ 1296 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1297 { 0, 0 }, /* access date */ 1298 { 0, 0 }, /* high bits of start cluster */ 1299 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1300 { 0, 0 }, /* startcluster */ 1301 { 0, 0, 0, 0 } /* filesize */ 1302 }, 1303 { ".. ", " ", /* the .. entry */ 1304 ATTR_DIRECTORY, /* file attribute */ 1305 0, /* reserved */ 1306 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1307 { 0, 0 }, /* access date */ 1308 { 0, 0 }, /* high bits of start cluster */ 1309 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1310 { 0, 0 }, /* startcluster */ 1311 { 0, 0, 0, 0 } /* filesize */ 1312 } 1313 }; 1314 1315 static int 1316 msdosfs_mkdir(ap) 1317 struct vop_mkdir_args /* { 1318 struct vnode *a_dvp; 1319 struvt vnode **a_vpp; 1320 struvt componentname *a_cnp; 1321 struct vattr *a_vap; 1322 } */ *ap; 1323 { 1324 struct componentname *cnp = ap->a_cnp; 1325 struct denode *dep; 1326 struct denode *pdep = VTODE(ap->a_dvp); 1327 struct direntry *denp; 1328 struct msdosfsmount *pmp = pdep->de_pmp; 1329 struct buf *bp; 1330 u_long newcluster, pcl; 1331 int bn; 1332 int error; 1333 struct denode ndirent; 1334 struct timespec ts; 1335 1336 /* 1337 * If this is the root directory and there is no space left we 1338 * can't do anything. This is because the root directory can not 1339 * change size. 1340 */ 1341 if (pdep->de_StartCluster == MSDOSFSROOT 1342 && pdep->de_fndoffset >= pdep->de_FileSize) { 1343 error = ENOSPC; 1344 goto bad2; 1345 } 1346 1347 /* 1348 * Allocate a cluster to hold the about to be created directory. 1349 */ 1350 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1351 if (error) 1352 goto bad2; 1353 1354 bzero(&ndirent, sizeof(ndirent)); 1355 ndirent.de_pmp = pmp; 1356 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1357 getnanotime(&ts); 1358 DETIMES(&ndirent, &ts, &ts, &ts); 1359 1360 /* 1361 * Now fill the cluster with the "." and ".." entries. And write 1362 * the cluster to disk. This way it is there for the parent 1363 * directory to be pointing at if there were a crash. 1364 */ 1365 bn = cntobn(pmp, newcluster); 1366 /* always succeeds */ 1367 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1368 bzero(bp->b_data, pmp->pm_bpcluster); 1369 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1370 denp = (struct direntry *)bp->b_data; 1371 putushort(denp[0].deStartCluster, newcluster); 1372 putushort(denp[0].deCDate, ndirent.de_CDate); 1373 putushort(denp[0].deCTime, ndirent.de_CTime); 1374 denp[0].deCHundredth = ndirent.de_CHun; 1375 putushort(denp[0].deADate, ndirent.de_ADate); 1376 putushort(denp[0].deMDate, ndirent.de_MDate); 1377 putushort(denp[0].deMTime, ndirent.de_MTime); 1378 pcl = pdep->de_StartCluster; 1379 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1380 pcl = 0; 1381 putushort(denp[1].deStartCluster, pcl); 1382 putushort(denp[1].deCDate, ndirent.de_CDate); 1383 putushort(denp[1].deCTime, ndirent.de_CTime); 1384 denp[1].deCHundredth = ndirent.de_CHun; 1385 putushort(denp[1].deADate, ndirent.de_ADate); 1386 putushort(denp[1].deMDate, ndirent.de_MDate); 1387 putushort(denp[1].deMTime, ndirent.de_MTime); 1388 if (FAT32(pmp)) { 1389 putushort(denp[0].deHighClust, newcluster >> 16); 1390 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1391 } 1392 1393 error = bwrite(bp); 1394 if (error) 1395 goto bad; 1396 1397 /* 1398 * Now build up a directory entry pointing to the newly allocated 1399 * cluster. This will be written to an empty slot in the parent 1400 * directory. 1401 */ 1402 #ifdef DIAGNOSTIC 1403 if ((cnp->cn_flags & HASBUF) == 0) 1404 panic("msdosfs_mkdir: no name"); 1405 #endif 1406 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1407 if (error) 1408 goto bad; 1409 1410 ndirent.de_Attributes = ATTR_DIRECTORY; 1411 ndirent.de_LowerCase = 0; 1412 ndirent.de_StartCluster = newcluster; 1413 ndirent.de_FileSize = 0; 1414 ndirent.de_dev = pdep->de_dev; 1415 ndirent.de_devvp = pdep->de_devvp; 1416 error = createde(&ndirent, pdep, &dep, cnp); 1417 if (error) 1418 goto bad; 1419 *ap->a_vpp = DETOV(dep); 1420 return (0); 1421 1422 bad: 1423 clusterfree(pmp, newcluster, NULL); 1424 bad2: 1425 return (error); 1426 } 1427 1428 static int 1429 msdosfs_rmdir(ap) 1430 struct vop_rmdir_args /* { 1431 struct vnode *a_dvp; 1432 struct vnode *a_vp; 1433 struct componentname *a_cnp; 1434 } */ *ap; 1435 { 1436 register struct vnode *vp = ap->a_vp; 1437 register struct vnode *dvp = ap->a_dvp; 1438 register struct componentname *cnp = ap->a_cnp; 1439 register struct denode *ip, *dp; 1440 struct proc *p = cnp->cn_proc; 1441 int error; 1442 1443 ip = VTODE(vp); 1444 dp = VTODE(dvp); 1445 1446 /* 1447 * Verify the directory is empty (and valid). 1448 * (Rmdir ".." won't be valid since 1449 * ".." will contain a reference to 1450 * the current directory and thus be 1451 * non-empty.) 1452 */ 1453 error = 0; 1454 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1455 error = ENOTEMPTY; 1456 goto out; 1457 } 1458 /* 1459 * Delete the entry from the directory. For dos filesystems this 1460 * gets rid of the directory entry on disk, the in memory copy 1461 * still exists but the de_refcnt is <= 0. This prevents it from 1462 * being found by deget(). When the vput() on dep is done we give 1463 * up access and eventually msdosfs_reclaim() will be called which 1464 * will remove it from the denode cache. 1465 */ 1466 error = removede(dp, ip); 1467 if (error) 1468 goto out; 1469 /* 1470 * This is where we decrement the link count in the parent 1471 * directory. Since dos filesystems don't do this we just purge 1472 * the name cache. 1473 */ 1474 cache_purge(dvp); 1475 VOP_UNLOCK(dvp, 0, p); 1476 /* 1477 * Truncate the directory that is being deleted. 1478 */ 1479 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, p); 1480 cache_purge(vp); 1481 1482 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p); 1483 out: 1484 return (error); 1485 } 1486 1487 /* 1488 * DOS filesystems don't know what symlinks are. 1489 */ 1490 static int 1491 msdosfs_symlink(ap) 1492 struct vop_symlink_args /* { 1493 struct vnode *a_dvp; 1494 struct vnode **a_vpp; 1495 struct componentname *a_cnp; 1496 struct vattr *a_vap; 1497 char *a_target; 1498 } */ *ap; 1499 { 1500 return (EOPNOTSUPP); 1501 } 1502 1503 static int 1504 msdosfs_readdir(ap) 1505 struct vop_readdir_args /* { 1506 struct vnode *a_vp; 1507 struct uio *a_uio; 1508 struct ucred *a_cred; 1509 int *a_eofflag; 1510 int *a_ncookies; 1511 u_long **a_cookies; 1512 } */ *ap; 1513 { 1514 int error = 0; 1515 int diff; 1516 long n; 1517 int blsize; 1518 long on; 1519 u_long cn; 1520 u_long fileno; 1521 u_long dirsperblk; 1522 long bias = 0; 1523 daddr_t bn, lbn; 1524 struct buf *bp; 1525 struct denode *dep = VTODE(ap->a_vp); 1526 struct msdosfsmount *pmp = dep->de_pmp; 1527 struct direntry *dentp; 1528 struct dirent dirbuf; 1529 struct uio *uio = ap->a_uio; 1530 u_long *cookies = NULL; 1531 int ncookies = 0; 1532 off_t offset, off; 1533 int chksum = -1; 1534 1535 #ifdef MSDOSFS_DEBUG 1536 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1537 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1538 #endif 1539 1540 /* 1541 * msdosfs_readdir() won't operate properly on regular files since 1542 * it does i/o only with the the filesystem vnode, and hence can 1543 * retrieve the wrong block from the buffer cache for a plain file. 1544 * So, fail attempts to readdir() on a plain file. 1545 */ 1546 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1547 return (ENOTDIR); 1548 1549 /* 1550 * To be safe, initialize dirbuf 1551 */ 1552 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1553 1554 /* 1555 * If the user buffer is smaller than the size of one dos directory 1556 * entry or the file offset is not a multiple of the size of a 1557 * directory entry, then we fail the read. 1558 */ 1559 off = offset = uio->uio_offset; 1560 if (uio->uio_resid < sizeof(struct direntry) || 1561 (offset & (sizeof(struct direntry) - 1))) 1562 return (EINVAL); 1563 1564 if (ap->a_ncookies) { 1565 ncookies = uio->uio_resid / 16; 1566 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1567 M_WAITOK); 1568 *ap->a_cookies = cookies; 1569 *ap->a_ncookies = ncookies; 1570 } 1571 1572 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1573 1574 /* 1575 * If they are reading from the root directory then, we simulate 1576 * the . and .. entries since these don't exist in the root 1577 * directory. We also set the offset bias to make up for having to 1578 * simulate these entries. By this I mean that at file offset 64 we 1579 * read the first entry in the root directory that lives on disk. 1580 */ 1581 if (dep->de_StartCluster == MSDOSFSROOT 1582 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1583 #if 0 1584 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1585 offset); 1586 #endif 1587 bias = 2 * sizeof(struct direntry); 1588 if (offset < bias) { 1589 for (n = (int)offset / sizeof(struct direntry); 1590 n < 2; n++) { 1591 if (FAT32(pmp)) 1592 dirbuf.d_fileno = cntobn(pmp, 1593 pmp->pm_rootdirblk) 1594 * dirsperblk; 1595 else 1596 dirbuf.d_fileno = 1; 1597 dirbuf.d_type = DT_DIR; 1598 switch (n) { 1599 case 0: 1600 dirbuf.d_namlen = 1; 1601 strcpy(dirbuf.d_name, "."); 1602 break; 1603 case 1: 1604 dirbuf.d_namlen = 2; 1605 strcpy(dirbuf.d_name, ".."); 1606 break; 1607 } 1608 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1609 if (uio->uio_resid < dirbuf.d_reclen) 1610 goto out; 1611 error = uiomove((caddr_t) &dirbuf, 1612 dirbuf.d_reclen, uio); 1613 if (error) 1614 goto out; 1615 offset += sizeof(struct direntry); 1616 off = offset; 1617 if (cookies) { 1618 *cookies++ = offset; 1619 if (--ncookies <= 0) 1620 goto out; 1621 } 1622 } 1623 } 1624 } 1625 1626 off = offset; 1627 while (uio->uio_resid > 0) { 1628 lbn = de_cluster(pmp, offset - bias); 1629 on = (offset - bias) & pmp->pm_crbomask; 1630 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1631 diff = dep->de_FileSize - (offset - bias); 1632 if (diff <= 0) 1633 break; 1634 n = min(n, diff); 1635 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1636 if (error) 1637 break; 1638 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1639 if (error) { 1640 brelse(bp); 1641 return (error); 1642 } 1643 n = min(n, blsize - bp->b_resid); 1644 1645 /* 1646 * Convert from dos directory entries to fs-independent 1647 * directory entries. 1648 */ 1649 for (dentp = (struct direntry *)(bp->b_data + on); 1650 (char *)dentp < bp->b_data + on + n; 1651 dentp++, offset += sizeof(struct direntry)) { 1652 #if 0 1653 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1654 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1655 #endif 1656 /* 1657 * If this is an unused entry, we can stop. 1658 */ 1659 if (dentp->deName[0] == SLOT_EMPTY) { 1660 brelse(bp); 1661 goto out; 1662 } 1663 /* 1664 * Skip deleted entries. 1665 */ 1666 if (dentp->deName[0] == SLOT_DELETED) { 1667 chksum = -1; 1668 continue; 1669 } 1670 1671 /* 1672 * Handle Win95 long directory entries 1673 */ 1674 if (dentp->deAttributes == ATTR_WIN95) { 1675 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1676 continue; 1677 chksum = win2unixfn((struct winentry *)dentp, 1678 &dirbuf, chksum, 1679 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1680 pmp->pm_u2w); 1681 continue; 1682 } 1683 1684 /* 1685 * Skip volume labels 1686 */ 1687 if (dentp->deAttributes & ATTR_VOLUME) { 1688 chksum = -1; 1689 continue; 1690 } 1691 /* 1692 * This computation of d_fileno must match 1693 * the computation of va_fileid in 1694 * msdosfs_getattr. 1695 */ 1696 if (dentp->deAttributes & ATTR_DIRECTORY) { 1697 fileno = getushort(dentp->deStartCluster); 1698 if (FAT32(pmp)) 1699 fileno |= getushort(dentp->deHighClust) << 16; 1700 /* if this is the root directory */ 1701 if (fileno == MSDOSFSROOT) 1702 if (FAT32(pmp)) 1703 fileno = cntobn(pmp, 1704 pmp->pm_rootdirblk) 1705 * dirsperblk; 1706 else 1707 fileno = 1; 1708 else 1709 fileno = cntobn(pmp, fileno) * dirsperblk; 1710 dirbuf.d_fileno = fileno; 1711 dirbuf.d_type = DT_DIR; 1712 } else { 1713 dirbuf.d_fileno = offset / sizeof(struct direntry); 1714 dirbuf.d_type = DT_REG; 1715 } 1716 if (chksum != winChksum(dentp->deName)) 1717 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1718 (u_char *)dirbuf.d_name, 1719 dentp->deLowerCase | 1720 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1721 (LCASE_BASE | LCASE_EXT) : 0), 1722 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1723 pmp->pm_d2u, 1724 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1725 pmp->pm_ul); 1726 else 1727 dirbuf.d_name[dirbuf.d_namlen] = 0; 1728 chksum = -1; 1729 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1730 if (uio->uio_resid < dirbuf.d_reclen) { 1731 brelse(bp); 1732 goto out; 1733 } 1734 error = uiomove((caddr_t) &dirbuf, 1735 dirbuf.d_reclen, uio); 1736 if (error) { 1737 brelse(bp); 1738 goto out; 1739 } 1740 if (cookies) { 1741 *cookies++ = offset + sizeof(struct direntry); 1742 if (--ncookies <= 0) { 1743 brelse(bp); 1744 goto out; 1745 } 1746 } 1747 off = offset + sizeof(struct direntry); 1748 } 1749 brelse(bp); 1750 } 1751 out: 1752 /* Subtract unused cookies */ 1753 if (ap->a_ncookies) 1754 *ap->a_ncookies -= ncookies; 1755 1756 uio->uio_offset = off; 1757 1758 /* 1759 * Set the eofflag (NFS uses it) 1760 */ 1761 if (ap->a_eofflag) { 1762 if (dep->de_FileSize - (offset - bias) <= 0) 1763 *ap->a_eofflag = 1; 1764 else 1765 *ap->a_eofflag = 0; 1766 } 1767 return (error); 1768 } 1769 1770 /* 1771 * vp - address of vnode file the file 1772 * bn - which cluster we are interested in mapping to a filesystem block number. 1773 * vpp - returns the vnode for the block special file holding the filesystem 1774 * containing the file of interest 1775 * bnp - address of where to return the filesystem relative block number 1776 */ 1777 static int 1778 msdosfs_bmap(ap) 1779 struct vop_bmap_args /* { 1780 struct vnode *a_vp; 1781 daddr_t a_bn; 1782 struct vnode **a_vpp; 1783 daddr_t *a_bnp; 1784 int *a_runp; 1785 int *a_runb; 1786 } */ *ap; 1787 { 1788 struct denode *dep = VTODE(ap->a_vp); 1789 1790 if (ap->a_vpp != NULL) 1791 *ap->a_vpp = dep->de_devvp; 1792 if (ap->a_bnp == NULL) 1793 return (0); 1794 if (ap->a_runp) { 1795 /* 1796 * Sequential clusters should be counted here. 1797 */ 1798 *ap->a_runp = 0; 1799 } 1800 if (ap->a_runb) { 1801 *ap->a_runb = 0; 1802 } 1803 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0)); 1804 } 1805 1806 static int 1807 msdosfs_strategy(ap) 1808 struct vop_strategy_args /* { 1809 struct vnode *a_vp; 1810 struct buf *a_bp; 1811 } */ *ap; 1812 { 1813 struct buf *bp = ap->a_bp; 1814 struct denode *dep = VTODE(bp->b_vp); 1815 struct vnode *vp; 1816 int error = 0; 1817 1818 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1819 panic("msdosfs_strategy: spec"); 1820 /* 1821 * If we don't already know the filesystem relative block number 1822 * then get it using pcbmap(). If pcbmap() returns the block 1823 * number as -1 then we've got a hole in the file. DOS filesystems 1824 * don't allow files with holes, so we shouldn't ever see this. 1825 */ 1826 if (bp->b_blkno == bp->b_lblkno) { 1827 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0); 1828 if (error) { 1829 bp->b_error = error; 1830 bp->b_flags |= B_ERROR; 1831 biodone(bp); 1832 return (error); 1833 } 1834 if ((long)bp->b_blkno == -1) 1835 vfs_bio_clrbuf(bp); 1836 } 1837 if (bp->b_blkno == -1) { 1838 biodone(bp); 1839 return (0); 1840 } 1841 /* 1842 * Read/write the block from/to the disk that contains the desired 1843 * file block. 1844 */ 1845 vp = dep->de_devvp; 1846 bp->b_dev = vp->v_rdev; 1847 VOP_STRATEGY(vp, bp); 1848 return (0); 1849 } 1850 1851 static int 1852 msdosfs_print(ap) 1853 struct vop_print_args /* { 1854 struct vnode *vp; 1855 } */ *ap; 1856 { 1857 struct denode *dep = VTODE(ap->a_vp); 1858 1859 printf( 1860 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1861 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1862 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1863 lockmgr_printinfo(&dep->de_lock); 1864 printf("\n"); 1865 return (0); 1866 } 1867 1868 static int 1869 msdosfs_pathconf(ap) 1870 struct vop_pathconf_args /* { 1871 struct vnode *a_vp; 1872 int a_name; 1873 int *a_retval; 1874 } */ *ap; 1875 { 1876 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1877 1878 switch (ap->a_name) { 1879 case _PC_LINK_MAX: 1880 *ap->a_retval = 1; 1881 return (0); 1882 case _PC_NAME_MAX: 1883 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1884 return (0); 1885 case _PC_PATH_MAX: 1886 *ap->a_retval = PATH_MAX; 1887 return (0); 1888 case _PC_CHOWN_RESTRICTED: 1889 *ap->a_retval = 1; 1890 return (0); 1891 case _PC_NO_TRUNC: 1892 *ap->a_retval = 0; 1893 return (0); 1894 default: 1895 return (EINVAL); 1896 } 1897 /* NOTREACHED */ 1898 } 1899 1900 /* 1901 * get page routine 1902 * 1903 * XXX By default, wimp out... note that a_offset is ignored (and always 1904 * XXX has been). 1905 */ 1906 int 1907 msdosfs_getpages(ap) 1908 struct vop_getpages_args *ap; 1909 { 1910 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1911 ap->a_reqpage); 1912 } 1913 1914 /* 1915 * put page routine 1916 * 1917 * XXX By default, wimp out... note that a_offset is ignored (and always 1918 * XXX has been). 1919 */ 1920 int 1921 msdosfs_putpages(ap) 1922 struct vop_putpages_args *ap; 1923 { 1924 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1925 ap->a_sync, ap->a_rtvals); 1926 } 1927 1928 /* Global vfs data structures for msdosfs */ 1929 vop_t **msdosfs_vnodeop_p; 1930 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1931 { &vop_default_desc, (vop_t *) vop_defaultop }, 1932 { &vop_access_desc, (vop_t *) msdosfs_access }, 1933 { &vop_bmap_desc, (vop_t *) msdosfs_bmap }, 1934 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup }, 1935 { &vop_close_desc, (vop_t *) msdosfs_close }, 1936 { &vop_create_desc, (vop_t *) msdosfs_create }, 1937 { &vop_fsync_desc, (vop_t *) msdosfs_fsync }, 1938 { &vop_getattr_desc, (vop_t *) msdosfs_getattr }, 1939 { &vop_inactive_desc, (vop_t *) msdosfs_inactive }, 1940 { &vop_islocked_desc, (vop_t *) vop_stdislocked }, 1941 { &vop_link_desc, (vop_t *) msdosfs_link }, 1942 { &vop_lock_desc, (vop_t *) vop_stdlock }, 1943 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup }, 1944 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir }, 1945 { &vop_mknod_desc, (vop_t *) msdosfs_mknod }, 1946 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf }, 1947 { &vop_print_desc, (vop_t *) msdosfs_print }, 1948 { &vop_read_desc, (vop_t *) msdosfs_read }, 1949 { &vop_readdir_desc, (vop_t *) msdosfs_readdir }, 1950 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim }, 1951 { &vop_remove_desc, (vop_t *) msdosfs_remove }, 1952 { &vop_rename_desc, (vop_t *) msdosfs_rename }, 1953 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir }, 1954 { &vop_setattr_desc, (vop_t *) msdosfs_setattr }, 1955 { &vop_strategy_desc, (vop_t *) msdosfs_strategy }, 1956 { &vop_symlink_desc, (vop_t *) msdosfs_symlink }, 1957 { &vop_unlock_desc, (vop_t *) vop_stdunlock }, 1958 { &vop_write_desc, (vop_t *) msdosfs_write }, 1959 { &vop_getpages_desc, (vop_t *) msdosfs_getpages }, 1960 { &vop_putpages_desc, (vop_t *) msdosfs_putpages }, 1961 { NULL, NULL } 1962 }; 1963 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1964 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1965 1966 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 1967