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_abortop __P((struct vop_abortop_args *)); 97 static int msdosfs_bmap __P((struct vop_bmap_args *)); 98 static int msdosfs_strategy __P((struct vop_strategy_args *)); 99 static int msdosfs_print __P((struct vop_print_args *)); 100 static int msdosfs_pathconf __P((struct vop_pathconf_args *ap)); 101 static int msdosfs_getpages __P((struct vop_getpages_args *)); 102 static int msdosfs_putpages __P((struct vop_putpages_args *)); 103 104 /* 105 * Some general notes: 106 * 107 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 108 * read/written using the vnode for the filesystem. Blocks that represent 109 * the contents of a file are read/written using the vnode for the file 110 * (including directories when they are read/written as files). This 111 * presents problems for the dos filesystem because data that should be in 112 * an inode (if dos had them) resides in the directory itself. Since we 113 * must update directory entries without the benefit of having the vnode 114 * for the directory we must use the vnode for the filesystem. This means 115 * that when a directory is actually read/written (via read, write, or 116 * readdir, or seek) we must use the vnode for the filesystem instead of 117 * the vnode for the directory as would happen in ufs. This is to insure we 118 * retreive the correct block from the buffer cache since the hash value is 119 * based upon the vnode address and the desired block number. 120 */ 121 122 /* 123 * Create a regular file. On entry the directory to contain the file being 124 * created is locked. We must release before we return. We must also free 125 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 126 * only if the SAVESTART bit in cn_flags is clear on success. 127 */ 128 static int 129 msdosfs_create(ap) 130 struct vop_create_args /* { 131 struct vnode *a_dvp; 132 struct vnode **a_vpp; 133 struct componentname *a_cnp; 134 struct vattr *a_vap; 135 } */ *ap; 136 { 137 struct componentname *cnp = ap->a_cnp; 138 struct denode ndirent; 139 struct denode *dep; 140 struct denode *pdep = VTODE(ap->a_dvp); 141 struct timespec ts; 142 int error; 143 144 #ifdef MSDOSFS_DEBUG 145 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 146 #endif 147 148 /* 149 * If this is the root directory and there is no space left we 150 * can't do anything. This is because the root directory can not 151 * change size. 152 */ 153 if (pdep->de_StartCluster == MSDOSFSROOT 154 && pdep->de_fndoffset >= pdep->de_FileSize) { 155 error = ENOSPC; 156 goto bad; 157 } 158 159 /* 160 * Create a directory entry for the file, then call createde() to 161 * have it installed. NOTE: DOS files are always executable. We 162 * use the absence of the owner write bit to make the file 163 * readonly. 164 */ 165 #ifdef DIAGNOSTIC 166 if ((cnp->cn_flags & HASBUF) == 0) 167 panic("msdosfs_create: no name"); 168 #endif 169 bzero(&ndirent, sizeof(ndirent)); 170 error = uniqdosname(pdep, cnp, ndirent.de_Name); 171 if (error) 172 goto bad; 173 174 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 175 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 176 ndirent.de_LowerCase = 0; 177 ndirent.de_StartCluster = 0; 178 ndirent.de_FileSize = 0; 179 ndirent.de_dev = pdep->de_dev; 180 ndirent.de_devvp = pdep->de_devvp; 181 ndirent.de_pmp = pdep->de_pmp; 182 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 183 getnanotime(&ts); 184 DETIMES(&ndirent, &ts, &ts, &ts); 185 error = createde(&ndirent, pdep, &dep, cnp); 186 if (error) 187 goto bad; 188 if ((cnp->cn_flags & SAVESTART) == 0) 189 zfree(namei_zone, cnp->cn_pnbuf); 190 *ap->a_vpp = DETOV(dep); 191 return (0); 192 193 bad: 194 zfree(namei_zone, cnp->cn_pnbuf); 195 return (error); 196 } 197 198 static int 199 msdosfs_mknod(ap) 200 struct vop_mknod_args /* { 201 struct vnode *a_dvp; 202 struct vnode **a_vpp; 203 struct componentname *a_cnp; 204 struct vattr *a_vap; 205 } */ *ap; 206 { 207 208 switch (ap->a_vap->va_type) { 209 case VDIR: 210 return (msdosfs_mkdir((struct vop_mkdir_args *)ap)); 211 break; 212 213 case VREG: 214 return (msdosfs_create((struct vop_create_args *)ap)); 215 break; 216 217 default: 218 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 219 return (EINVAL); 220 } 221 /* NOTREACHED */ 222 } 223 224 static int 225 msdosfs_close(ap) 226 struct vop_close_args /* { 227 struct vnode *a_vp; 228 int a_fflag; 229 struct ucred *a_cred; 230 struct proc *a_p; 231 } */ *ap; 232 { 233 struct vnode *vp = ap->a_vp; 234 struct denode *dep = VTODE(vp); 235 struct timespec ts; 236 237 simple_lock(&vp->v_interlock); 238 if (vp->v_usecount > 1) { 239 getnanotime(&ts); 240 DETIMES(dep, &ts, &ts, &ts); 241 } 242 simple_unlock(&vp->v_interlock); 243 return 0; 244 } 245 246 static int 247 msdosfs_access(ap) 248 struct vop_access_args /* { 249 struct vnode *a_vp; 250 int a_mode; 251 struct ucred *a_cred; 252 struct proc *a_p; 253 } */ *ap; 254 { 255 struct vnode *vp = ap->a_vp; 256 struct denode *dep = VTODE(ap->a_vp); 257 struct msdosfsmount *pmp = dep->de_pmp; 258 struct ucred *cred = ap->a_cred; 259 mode_t mask, file_mode, mode = ap->a_mode; 260 register gid_t *gp; 261 int i; 262 263 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 264 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 265 file_mode &= pmp->pm_mask; 266 267 /* 268 * Disallow write attempts on read-only file systems; 269 * unless the file is a socket, fifo, or a block or 270 * character device resident on the file system. 271 */ 272 if (mode & VWRITE) { 273 switch (vp->v_type) { 274 case VDIR: 275 case VLNK: 276 case VREG: 277 if (vp->v_mount->mnt_flag & MNT_RDONLY) 278 return (EROFS); 279 break; 280 default: 281 break; 282 } 283 } 284 285 /* User id 0 always gets access. */ 286 if (cred->cr_uid == 0) 287 return 0; 288 289 mask = 0; 290 291 /* Otherwise, check the owner. */ 292 if (cred->cr_uid == pmp->pm_uid) { 293 if (mode & VEXEC) 294 mask |= S_IXUSR; 295 if (mode & VREAD) 296 mask |= S_IRUSR; 297 if (mode & VWRITE) 298 mask |= S_IWUSR; 299 return (file_mode & mask) == mask ? 0 : EACCES; 300 } 301 302 /* Otherwise, check the groups. */ 303 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 304 if (pmp->pm_gid == *gp) { 305 if (mode & VEXEC) 306 mask |= S_IXGRP; 307 if (mode & VREAD) 308 mask |= S_IRGRP; 309 if (mode & VWRITE) 310 mask |= S_IWGRP; 311 return (file_mode & mask) == mask ? 0 : EACCES; 312 } 313 314 /* Otherwise, check everyone else. */ 315 if (mode & VEXEC) 316 mask |= S_IXOTH; 317 if (mode & VREAD) 318 mask |= S_IROTH; 319 if (mode & VWRITE) 320 mask |= S_IWOTH; 321 return (file_mode & mask) == mask ? 0 : EACCES; 322 } 323 324 static int 325 msdosfs_getattr(ap) 326 struct vop_getattr_args /* { 327 struct vnode *a_vp; 328 struct vattr *a_vap; 329 struct ucred *a_cred; 330 struct proc *a_p; 331 } */ *ap; 332 { 333 struct denode *dep = VTODE(ap->a_vp); 334 struct msdosfsmount *pmp = dep->de_pmp; 335 struct vattr *vap = ap->a_vap; 336 mode_t mode; 337 struct timespec ts; 338 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 339 u_long fileid; 340 341 getnanotime(&ts); 342 DETIMES(dep, &ts, &ts, &ts); 343 vap->va_fsid = dev2udev(dep->de_dev); 344 /* 345 * The following computation of the fileid must be the same as that 346 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 347 * doesn't work. 348 */ 349 if (dep->de_Attributes & ATTR_DIRECTORY) { 350 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk; 351 if (dep->de_StartCluster == MSDOSFSROOT) 352 fileid = 1; 353 } else { 354 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk; 355 if (dep->de_dirclust == MSDOSFSROOT) 356 fileid = roottobn(pmp, 0) * dirsperblk; 357 fileid += dep->de_diroffset / sizeof(struct direntry); 358 } 359 vap->va_fileid = fileid; 360 if ((dep->de_Attributes & ATTR_READONLY) == 0) 361 mode = S_IRWXU|S_IRWXG|S_IRWXO; 362 else 363 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 364 vap->va_mode = mode & pmp->pm_mask; 365 vap->va_uid = pmp->pm_uid; 366 vap->va_gid = pmp->pm_gid; 367 vap->va_nlink = 1; 368 vap->va_rdev = 0; 369 vap->va_size = dep->de_FileSize; 370 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 371 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 372 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 373 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 374 } else { 375 vap->va_atime = vap->va_mtime; 376 vap->va_ctime = vap->va_mtime; 377 } 378 vap->va_flags = 0; 379 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 380 vap->va_flags |= SF_ARCHIVED; 381 vap->va_gen = 0; 382 vap->va_blocksize = pmp->pm_bpcluster; 383 vap->va_bytes = 384 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 385 vap->va_type = ap->a_vp->v_type; 386 vap->va_filerev = dep->de_modrev; 387 return (0); 388 } 389 390 static int 391 msdosfs_setattr(ap) 392 struct vop_setattr_args /* { 393 struct vnode *a_vp; 394 struct vattr *a_vap; 395 struct ucred *a_cred; 396 struct proc *a_p; 397 } */ *ap; 398 { 399 struct vnode *vp = ap->a_vp; 400 struct denode *dep = VTODE(ap->a_vp); 401 struct msdosfsmount *pmp = dep->de_pmp; 402 struct vattr *vap = ap->a_vap; 403 struct ucred *cred = ap->a_cred; 404 int error = 0; 405 406 #ifdef MSDOSFS_DEBUG 407 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 408 ap->a_vp, vap, cred, ap->a_p); 409 #endif 410 411 /* 412 * Check for unsettable attributes. 413 */ 414 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 415 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 416 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 417 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 418 #ifdef MSDOSFS_DEBUG 419 printf("msdosfs_setattr(): returning EINVAL\n"); 420 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 421 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 422 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 423 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 424 printf(" va_uid %x, va_gid %x\n", 425 vap->va_uid, vap->va_gid); 426 #endif 427 return (EINVAL); 428 } 429 if (vap->va_flags != VNOVAL) { 430 if (vp->v_mount->mnt_flag & MNT_RDONLY) 431 return (EROFS); 432 if (cred->cr_uid != pmp->pm_uid && 433 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT))) 434 return (error); 435 /* 436 * We are very inconsistent about handling unsupported 437 * attributes. We ignored the access time and the 438 * read and execute bits. We were strict for the other 439 * attributes. 440 * 441 * Here we are strict, stricter than ufs in not allowing 442 * users to attempt to set SF_SETTABLE bits or anyone to 443 * set unsupported bits. However, we ignore attempts to 444 * set ATTR_ARCHIVE for directories `cp -pr' from a more 445 * sensible file system attempts it a lot. 446 */ 447 if (cred->cr_uid != 0) { 448 if (vap->va_flags & SF_SETTABLE) 449 return EPERM; 450 } 451 if (vap->va_flags & ~SF_ARCHIVED) 452 return EOPNOTSUPP; 453 if (vap->va_flags & SF_ARCHIVED) 454 dep->de_Attributes &= ~ATTR_ARCHIVE; 455 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 456 dep->de_Attributes |= ATTR_ARCHIVE; 457 dep->de_flag |= DE_MODIFIED; 458 } 459 460 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 461 uid_t uid; 462 gid_t gid; 463 464 if (vp->v_mount->mnt_flag & MNT_RDONLY) 465 return (EROFS); 466 uid = vap->va_uid; 467 if (uid == (uid_t)VNOVAL) 468 uid = pmp->pm_uid; 469 gid = vap->va_gid; 470 if (gid == (gid_t)VNOVAL) 471 gid = pmp->pm_gid; 472 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 473 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 474 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT))) 475 return error; 476 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 477 return EINVAL; 478 } 479 480 if (vap->va_size != VNOVAL) { 481 /* 482 * Disallow write attempts on read-only file systems; 483 * unless the file is a socket, fifo, or a block or 484 * character device resident on the file system. 485 */ 486 switch (vp->v_type) { 487 case VDIR: 488 return (EISDIR); 489 /* NOT REACHED */ 490 case VLNK: 491 case VREG: 492 if (vp->v_mount->mnt_flag & MNT_RDONLY) 493 return (EROFS); 494 break; 495 default: 496 break; 497 } 498 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 499 if (error) 500 return error; 501 } 502 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 503 if (vp->v_mount->mnt_flag & MNT_RDONLY) 504 return (EROFS); 505 if (cred->cr_uid != pmp->pm_uid && 506 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)) && 507 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 508 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_p)))) 509 return (error); 510 if (vp->v_type != VDIR) { 511 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 512 vap->va_atime.tv_sec != VNOVAL) 513 unix2dostime(&vap->va_atime, &dep->de_ADate, NULL, NULL); 514 if (vap->va_mtime.tv_sec != VNOVAL) 515 unix2dostime(&vap->va_mtime, &dep->de_MDate, &dep->de_MTime, NULL); 516 dep->de_Attributes |= ATTR_ARCHIVE; 517 dep->de_flag |= DE_MODIFIED; 518 } 519 } 520 /* 521 * DOS files only have the ability to have their writability 522 * attribute set, so we use the owner write bit to set the readonly 523 * attribute. 524 */ 525 if (vap->va_mode != (mode_t)VNOVAL) { 526 if (vp->v_mount->mnt_flag & MNT_RDONLY) 527 return (EROFS); 528 if (cred->cr_uid != pmp->pm_uid && 529 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT))) 530 return (error); 531 if (vp->v_type != VDIR) { 532 /* We ignore the read and execute bits. */ 533 if (vap->va_mode & VWRITE) 534 dep->de_Attributes &= ~ATTR_READONLY; 535 else 536 dep->de_Attributes |= ATTR_READONLY; 537 dep->de_flag |= DE_MODIFIED; 538 } 539 } 540 return (deupdat(dep, 1)); 541 } 542 543 static int 544 msdosfs_read(ap) 545 struct vop_read_args /* { 546 struct vnode *a_vp; 547 struct uio *a_uio; 548 int a_ioflag; 549 struct ucred *a_cred; 550 } */ *ap; 551 { 552 int error = 0; 553 int diff; 554 int blsize; 555 int isadir; 556 int orig_resid; 557 long n; 558 long on; 559 daddr_t lbn; 560 daddr_t rablock; 561 int rasize; 562 int seqcount; 563 struct buf *bp; 564 struct vnode *vp = ap->a_vp; 565 struct denode *dep = VTODE(vp); 566 struct msdosfsmount *pmp = dep->de_pmp; 567 struct uio *uio = ap->a_uio; 568 569 if (uio->uio_offset < 0) 570 return (EINVAL); 571 572 /* 573 * If they didn't ask for any data, then we are done. 574 */ 575 orig_resid = uio->uio_resid; 576 if (orig_resid <= 0) 577 return (0); 578 579 seqcount = ap->a_ioflag >> 16; 580 581 isadir = dep->de_Attributes & ATTR_DIRECTORY; 582 do { 583 lbn = de_cluster(pmp, uio->uio_offset); 584 on = uio->uio_offset & pmp->pm_crbomask; 585 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 586 diff = dep->de_FileSize - uio->uio_offset; 587 if (diff <= 0) 588 break; 589 if (diff < n) 590 n = diff; 591 /* convert cluster # to block # if a directory */ 592 if (isadir) { 593 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 594 if (error) 595 break; 596 } 597 /* 598 * If we are operating on a directory file then be sure to 599 * do i/o with the vnode for the filesystem instead of the 600 * vnode for the directory. 601 */ 602 if (isadir) { 603 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 604 } else { 605 rablock = lbn + 1; 606 if (seqcount > 1 && 607 de_cn2off(pmp, rablock) < dep->de_FileSize) { 608 rasize = pmp->pm_bpcluster; 609 error = breadn(vp, lbn, pmp->pm_bpcluster, 610 &rablock, &rasize, 1, NOCRED, &bp); 611 } else { 612 error = bread(vp, lbn, pmp->pm_bpcluster, 613 NOCRED, &bp); 614 } 615 } 616 n = min(n, pmp->pm_bpcluster - bp->b_resid); 617 if (error) { 618 brelse(bp); 619 break; 620 } 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 static int 634 msdosfs_write(ap) 635 struct vop_write_args /* { 636 struct vnode *a_vp; 637 struct uio *a_uio; 638 int a_ioflag; 639 struct ucred *a_cred; 640 } */ *ap; 641 { 642 int n; 643 int croffset; 644 int resid; 645 u_long osize; 646 int error = 0; 647 u_long count; 648 daddr_t bn, lastcn; 649 struct buf *bp; 650 int ioflag = ap->a_ioflag; 651 struct uio *uio = ap->a_uio; 652 struct proc *p = uio->uio_procp; 653 struct vnode *vp = ap->a_vp; 654 struct vnode *thisvp; 655 struct denode *dep = VTODE(vp); 656 struct msdosfsmount *pmp = dep->de_pmp; 657 struct ucred *cred = ap->a_cred; 658 659 #ifdef MSDOSFS_DEBUG 660 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 661 vp, uio, ioflag, cred); 662 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 663 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 664 #endif 665 666 switch (vp->v_type) { 667 case VREG: 668 if (ioflag & IO_APPEND) 669 uio->uio_offset = dep->de_FileSize; 670 thisvp = vp; 671 break; 672 case VDIR: 673 return EISDIR; 674 default: 675 panic("msdosfs_write(): bad file type"); 676 } 677 678 if (uio->uio_offset < 0) 679 return (EINVAL); 680 681 if (uio->uio_resid == 0) 682 return (0); 683 684 /* 685 * If they've exceeded their filesize limit, tell them about it. 686 */ 687 if (p && 688 ((uio->uio_offset + uio->uio_resid) > 689 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 690 psignal(p, SIGXFSZ); 691 return (EFBIG); 692 } 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, cred); 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, cred, &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); 788 789 /* 790 * If they want this synchronous then write it and wait for 791 * it. Otherwise, if on a cluster boundary write it 792 * asynchronously so we can move on to the next block 793 * without delay. Otherwise do a delayed write because we 794 * may want to write somemore into the block later. 795 */ 796 if (ioflag & IO_SYNC) 797 (void) bwrite(bp); 798 else if (n + croffset == pmp->pm_bpcluster) 799 bawrite(bp); 800 else 801 bdwrite(bp); 802 dep->de_flag |= DE_UPDATE; 803 } while (error == 0 && uio->uio_resid > 0); 804 805 /* 806 * If the write failed and they want us to, truncate the file back 807 * to the size it was before the write was attempted. 808 */ 809 errexit: 810 if (error) { 811 if (ioflag & IO_UNIT) { 812 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 813 uio->uio_offset -= resid - uio->uio_resid; 814 uio->uio_resid = resid; 815 } else { 816 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 817 if (uio->uio_resid != resid) 818 error = 0; 819 } 820 } else if (ioflag & IO_SYNC) 821 error = deupdat(dep, 1); 822 return (error); 823 } 824 825 /* 826 * Flush the blocks of a file to disk. 827 * 828 * This function is worthless for vnodes that represent directories. Maybe we 829 * could just do a sync if they try an fsync on a directory file. 830 */ 831 static int 832 msdosfs_fsync(ap) 833 struct vop_fsync_args /* { 834 struct vnode *a_vp; 835 struct ucred *a_cred; 836 int a_waitfor; 837 struct proc *a_p; 838 } */ *ap; 839 { 840 struct vnode *vp = ap->a_vp; 841 int s; 842 struct buf *bp, *nbp; 843 844 /* 845 * Flush all dirty buffers associated with a vnode. 846 */ 847 loop: 848 s = splbio(); 849 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 850 nbp = TAILQ_NEXT(bp, b_vnbufs); 851 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) 852 continue; 853 if ((bp->b_flags & B_DELWRI) == 0) 854 panic("msdosfs_fsync: not dirty"); 855 bremfree(bp); 856 splx(s); 857 (void) bwrite(bp); 858 goto loop; 859 } 860 while (vp->v_numoutput) { 861 vp->v_flag |= VBWAIT; 862 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 863 } 864 #ifdef DIAGNOSTIC 865 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) { 866 vprint("msdosfs_fsync: dirty", vp); 867 goto loop; 868 } 869 #endif 870 splx(s); 871 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 872 } 873 874 static int 875 msdosfs_remove(ap) 876 struct vop_remove_args /* { 877 struct vnode *a_dvp; 878 struct vnode *a_vp; 879 struct componentname *a_cnp; 880 } */ *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 static int 902 msdosfs_link(ap) 903 struct vop_link_args /* { 904 struct vnode *a_tdvp; 905 struct vnode *a_vp; 906 struct componentname *a_cnp; 907 } */ *ap; 908 { 909 VOP_ABORTOP(ap->a_tdvp, ap->a_cnp); 910 return (EOPNOTSUPP); 911 } 912 913 /* 914 * Renames on files require moving the denode to a new hash queue since the 915 * denode's location is used to compute which hash queue to put the file 916 * in. Unless it is a rename in place. For example "mv a b". 917 * 918 * What follows is the basic algorithm: 919 * 920 * if (file move) { 921 * if (dest file exists) { 922 * remove dest file 923 * } 924 * if (dest and src in same directory) { 925 * rewrite name in existing directory slot 926 * } else { 927 * write new entry in dest directory 928 * update offset and dirclust in denode 929 * move denode to new hash chain 930 * clear old directory entry 931 * } 932 * } else { 933 * directory move 934 * if (dest directory exists) { 935 * if (dest is not empty) { 936 * return ENOTEMPTY 937 * } 938 * remove dest directory 939 * } 940 * if (dest and src in same directory) { 941 * rewrite name in existing entry 942 * } else { 943 * be sure dest is not a child of src directory 944 * write entry in dest directory 945 * update "." and ".." in moved directory 946 * clear old directory entry for moved directory 947 * } 948 * } 949 * 950 * On entry: 951 * source's parent directory is unlocked 952 * source file or directory is unlocked 953 * destination's parent directory is locked 954 * destination file or directory is locked if it exists 955 * 956 * On exit: 957 * all denodes should be released 958 * 959 * Notes: 960 * I'm not sure how the memory containing the pathnames pointed at by the 961 * componentname structures is freed, there may be some memory bleeding 962 * for each rename done. 963 */ 964 static int 965 msdosfs_rename(ap) 966 struct vop_rename_args /* { 967 struct vnode *a_fdvp; 968 struct vnode *a_fvp; 969 struct componentname *a_fcnp; 970 struct vnode *a_tdvp; 971 struct vnode *a_tvp; 972 struct componentname *a_tcnp; 973 } */ *ap; 974 { 975 struct vnode *tdvp = ap->a_tdvp; 976 struct vnode *fvp = ap->a_fvp; 977 struct vnode *fdvp = ap->a_fdvp; 978 struct vnode *tvp = ap->a_tvp; 979 struct componentname *tcnp = ap->a_tcnp; 980 struct componentname *fcnp = ap->a_fcnp; 981 struct proc *p = fcnp->cn_proc; 982 struct denode *ip, *xp, *dp, *zp; 983 u_char toname[11], oldname[11]; 984 u_long from_diroffset, to_diroffset; 985 u_char to_count; 986 int doingdirectory = 0, newparent = 0; 987 int error; 988 u_long cn; 989 daddr_t bn; 990 struct denode *fddep; /* from file's parent directory */ 991 struct denode *fdep; /* from file or directory */ 992 struct denode *tddep; /* to file's parent directory */ 993 struct denode *tdep; /* to file or directory */ 994 struct msdosfsmount *pmp; 995 struct direntry *dotdotp; 996 struct buf *bp; 997 998 fddep = VTODE(ap->a_fdvp); 999 fdep = VTODE(ap->a_fvp); 1000 tddep = VTODE(ap->a_tdvp); 1001 tdep = tvp ? VTODE(tvp) : NULL; 1002 pmp = fddep->de_pmp; 1003 1004 pmp = VFSTOMSDOSFS(fdvp->v_mount); 1005 1006 #ifdef DIAGNOSTIC 1007 if ((tcnp->cn_flags & HASBUF) == 0 || 1008 (fcnp->cn_flags & HASBUF) == 0) 1009 panic("msdosfs_rename: no name"); 1010 #endif 1011 /* 1012 * Check for cross-device rename. 1013 */ 1014 if ((fvp->v_mount != tdvp->v_mount) || 1015 (tvp && (fvp->v_mount != tvp->v_mount))) { 1016 error = EXDEV; 1017 abortit: 1018 VOP_ABORTOP(tdvp, tcnp); 1019 if (tdvp == tvp) 1020 vrele(tdvp); 1021 else 1022 vput(tdvp); 1023 if (tvp) 1024 vput(tvp); 1025 VOP_ABORTOP(fdvp, fcnp); 1026 vrele(fdvp); 1027 vrele(fvp); 1028 return (error); 1029 } 1030 1031 /* 1032 * If source and dest are the same, do nothing. 1033 */ 1034 if (tvp == fvp) { 1035 error = 0; 1036 goto abortit; 1037 } 1038 1039 error = vn_lock(fvp, LK_EXCLUSIVE, p); 1040 if (error) 1041 goto abortit; 1042 dp = VTODE(fdvp); 1043 ip = VTODE(fvp); 1044 1045 /* 1046 * Be sure we are not renaming ".", "..", or an alias of ".". This 1047 * leads to a crippled directory tree. It's pretty tough to do a 1048 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1049 * doesn't work if the ".." entry is missing. 1050 */ 1051 if (ip->de_Attributes & ATTR_DIRECTORY) { 1052 /* 1053 * Avoid ".", "..", and aliases of "." for obvious reasons. 1054 */ 1055 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1056 dp == ip || 1057 (fcnp->cn_flags & ISDOTDOT) || 1058 (tcnp->cn_flags & ISDOTDOT) || 1059 (ip->de_flag & DE_RENAME)) { 1060 VOP_UNLOCK(fvp, 0, p); 1061 error = EINVAL; 1062 goto abortit; 1063 } 1064 ip->de_flag |= DE_RENAME; 1065 doingdirectory++; 1066 } 1067 1068 /* 1069 * When the target exists, both the directory 1070 * and target vnodes are returned locked. 1071 */ 1072 dp = VTODE(tdvp); 1073 xp = tvp ? VTODE(tvp) : NULL; 1074 /* 1075 * Remember direntry place to use for destination 1076 */ 1077 to_diroffset = dp->de_fndoffset; 1078 to_count = dp->de_fndcnt; 1079 1080 /* 1081 * If ".." must be changed (ie the directory gets a new 1082 * parent) then the source directory must not be in the 1083 * directory heirarchy above the target, as this would 1084 * orphan everything below the source directory. Also 1085 * the user must have write permission in the source so 1086 * as to be able to change "..". We must repeat the call 1087 * to namei, as the parent directory is unlocked by the 1088 * call to doscheckpath(). 1089 */ 1090 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 1091 VOP_UNLOCK(fvp, 0, p); 1092 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1093 newparent = 1; 1094 vrele(fdvp); 1095 if (doingdirectory && newparent) { 1096 if (error) /* write access check above */ 1097 goto bad; 1098 if (xp != NULL) 1099 vput(tvp); 1100 /* 1101 * doscheckpath() vput()'s dp, 1102 * so we have to do a relookup afterwards 1103 */ 1104 error = doscheckpath(ip, dp); 1105 if (error) 1106 goto out; 1107 if ((tcnp->cn_flags & SAVESTART) == 0) 1108 panic("msdosfs_rename: lost to startdir"); 1109 error = relookup(tdvp, &tvp, tcnp); 1110 if (error) 1111 goto out; 1112 dp = VTODE(tdvp); 1113 xp = tvp ? VTODE(tvp) : NULL; 1114 } 1115 1116 if (xp != NULL) { 1117 /* 1118 * Target must be empty if a directory and have no links 1119 * to it. Also, ensure source and target are compatible 1120 * (both directories, or both not directories). 1121 */ 1122 if (xp->de_Attributes & ATTR_DIRECTORY) { 1123 if (!dosdirempty(xp)) { 1124 error = ENOTEMPTY; 1125 goto bad; 1126 } 1127 if (!doingdirectory) { 1128 error = ENOTDIR; 1129 goto bad; 1130 } 1131 cache_purge(tdvp); 1132 } else if (doingdirectory) { 1133 error = EISDIR; 1134 goto bad; 1135 } 1136 error = removede(dp, xp); 1137 if (error) 1138 goto bad; 1139 vput(tvp); 1140 xp = NULL; 1141 } 1142 1143 /* 1144 * Convert the filename in tcnp into a dos filename. We copy this 1145 * into the denode and directory entry for the destination 1146 * file/directory. 1147 */ 1148 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1149 if (error) 1150 goto abortit; 1151 1152 /* 1153 * Since from wasn't locked at various places above, 1154 * have to do a relookup here. 1155 */ 1156 fcnp->cn_flags &= ~MODMASK; 1157 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1158 if ((fcnp->cn_flags & SAVESTART) == 0) 1159 panic("msdosfs_rename: lost from startdir"); 1160 if (!newparent) 1161 VOP_UNLOCK(tdvp, 0, p); 1162 (void) relookup(fdvp, &fvp, fcnp); 1163 if (fvp == NULL) { 1164 /* 1165 * From name has disappeared. 1166 */ 1167 if (doingdirectory) 1168 panic("rename: lost dir entry"); 1169 vrele(ap->a_fvp); 1170 if (newparent) 1171 VOP_UNLOCK(tdvp, 0, p); 1172 vrele(tdvp); 1173 return 0; 1174 } 1175 xp = VTODE(fvp); 1176 zp = VTODE(fdvp); 1177 from_diroffset = zp->de_fndoffset; 1178 1179 /* 1180 * Ensure that the directory entry still exists and has not 1181 * changed till now. If the source is a file the entry may 1182 * have been unlinked or renamed. In either case there is 1183 * no further work to be done. If the source is a directory 1184 * then it cannot have been rmdir'ed or renamed; this is 1185 * prohibited by the DE_RENAME flag. 1186 */ 1187 if (xp != ip) { 1188 if (doingdirectory) 1189 panic("rename: lost dir entry"); 1190 vrele(ap->a_fvp); 1191 VOP_UNLOCK(fvp, 0, p); 1192 if (newparent) 1193 VOP_UNLOCK(fdvp, 0, p); 1194 xp = NULL; 1195 } else { 1196 vrele(fvp); 1197 xp = NULL; 1198 1199 /* 1200 * First write a new entry in the destination 1201 * directory and mark the entry in the source directory 1202 * as deleted. Then move the denode to the correct hash 1203 * chain for its new location in the filesystem. And, if 1204 * we moved a directory, then update its .. entry to point 1205 * to the new parent directory. 1206 */ 1207 bcopy(ip->de_Name, oldname, 11); 1208 bcopy(toname, ip->de_Name, 11); /* update denode */ 1209 dp->de_fndoffset = to_diroffset; 1210 dp->de_fndcnt = to_count; 1211 error = createde(ip, dp, (struct denode **)0, tcnp); 1212 if (error) { 1213 bcopy(oldname, ip->de_Name, 11); 1214 if (newparent) 1215 VOP_UNLOCK(fdvp, 0, p); 1216 VOP_UNLOCK(fvp, 0, p); 1217 goto bad; 1218 } 1219 ip->de_refcnt++; 1220 zp->de_fndoffset = from_diroffset; 1221 error = removede(zp, ip); 1222 if (error) { 1223 /* XXX should really panic here, fs is corrupt */ 1224 if (newparent) 1225 VOP_UNLOCK(fdvp, 0, p); 1226 VOP_UNLOCK(fvp, 0, p); 1227 goto bad; 1228 } 1229 if (!doingdirectory) { 1230 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1231 &ip->de_dirclust, 0); 1232 if (error) { 1233 /* XXX should really panic here, fs is corrupt */ 1234 if (newparent) 1235 VOP_UNLOCK(fdvp, 0, p); 1236 VOP_UNLOCK(fvp, 0, p); 1237 goto bad; 1238 } 1239 if (ip->de_dirclust == MSDOSFSROOT) 1240 ip->de_diroffset = to_diroffset; 1241 else 1242 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1243 } 1244 reinsert(ip); 1245 if (newparent) 1246 VOP_UNLOCK(fdvp, 0, p); 1247 } 1248 1249 /* 1250 * If we moved a directory to a new parent directory, then we must 1251 * fixup the ".." entry in the moved directory. 1252 */ 1253 if (doingdirectory && newparent) { 1254 cn = ip->de_StartCluster; 1255 if (cn == MSDOSFSROOT) { 1256 /* this should never happen */ 1257 panic("msdosfs_rename(): updating .. in root directory?"); 1258 } else 1259 bn = cntobn(pmp, cn); 1260 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1261 NOCRED, &bp); 1262 if (error) { 1263 /* XXX should really panic here, fs is corrupt */ 1264 brelse(bp); 1265 VOP_UNLOCK(fvp, 0, p); 1266 goto bad; 1267 } 1268 dotdotp = (struct direntry *)bp->b_data + 1; 1269 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1270 if (FAT32(pmp)) 1271 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1272 error = bwrite(bp); 1273 if (error) { 1274 /* XXX should really panic here, fs is corrupt */ 1275 VOP_UNLOCK(fvp, 0, p); 1276 goto bad; 1277 } 1278 } 1279 1280 VOP_UNLOCK(fvp, 0, p); 1281 bad: 1282 if (xp) 1283 vput(tvp); 1284 vput(tdvp); 1285 out: 1286 ip->de_flag &= ~DE_RENAME; 1287 vrele(fdvp); 1288 vrele(fvp); 1289 return (error); 1290 1291 } 1292 1293 static struct { 1294 struct direntry dot; 1295 struct direntry dotdot; 1296 } dosdirtemplate = { 1297 { ". ", " ", /* the . entry */ 1298 ATTR_DIRECTORY, /* file attribute */ 1299 0, /* reserved */ 1300 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1301 { 0, 0 }, /* access date */ 1302 { 0, 0 }, /* high bits of start cluster */ 1303 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1304 { 0, 0 }, /* startcluster */ 1305 { 0, 0, 0, 0 } /* filesize */ 1306 }, 1307 { ".. ", " ", /* the .. entry */ 1308 ATTR_DIRECTORY, /* file attribute */ 1309 0, /* reserved */ 1310 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1311 { 0, 0 }, /* access date */ 1312 { 0, 0 }, /* high bits of start cluster */ 1313 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1314 { 0, 0 }, /* startcluster */ 1315 { 0, 0, 0, 0 } /* filesize */ 1316 } 1317 }; 1318 1319 static int 1320 msdosfs_mkdir(ap) 1321 struct vop_mkdir_args /* { 1322 struct vnode *a_dvp; 1323 struvt vnode **a_vpp; 1324 struvt componentname *a_cnp; 1325 struct vattr *a_vap; 1326 } */ *ap; 1327 { 1328 struct componentname *cnp = ap->a_cnp; 1329 struct denode *dep; 1330 struct denode *pdep = VTODE(ap->a_dvp); 1331 struct direntry *denp; 1332 struct msdosfsmount *pmp = pdep->de_pmp; 1333 struct buf *bp; 1334 u_long newcluster, pcl; 1335 int bn; 1336 int error; 1337 struct denode ndirent; 1338 struct timespec ts; 1339 1340 /* 1341 * If this is the root directory and there is no space left we 1342 * can't do anything. This is because the root directory can not 1343 * change size. 1344 */ 1345 if (pdep->de_StartCluster == MSDOSFSROOT 1346 && pdep->de_fndoffset >= pdep->de_FileSize) { 1347 error = ENOSPC; 1348 goto bad2; 1349 } 1350 1351 /* 1352 * Allocate a cluster to hold the about to be created directory. 1353 */ 1354 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1355 if (error) 1356 goto bad2; 1357 1358 bzero(&ndirent, sizeof(ndirent)); 1359 ndirent.de_pmp = pmp; 1360 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1361 getnanotime(&ts); 1362 DETIMES(&ndirent, &ts, &ts, &ts); 1363 1364 /* 1365 * Now fill the cluster with the "." and ".." entries. And write 1366 * the cluster to disk. This way it is there for the parent 1367 * directory to be pointing at if there were a crash. 1368 */ 1369 bn = cntobn(pmp, newcluster); 1370 /* always succeeds */ 1371 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1372 bzero(bp->b_data, pmp->pm_bpcluster); 1373 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1374 denp = (struct direntry *)bp->b_data; 1375 putushort(denp[0].deStartCluster, newcluster); 1376 putushort(denp[0].deCDate, ndirent.de_CDate); 1377 putushort(denp[0].deCTime, ndirent.de_CTime); 1378 denp[0].deCHundredth = ndirent.de_CHun; 1379 putushort(denp[0].deADate, ndirent.de_ADate); 1380 putushort(denp[0].deMDate, ndirent.de_MDate); 1381 putushort(denp[0].deMTime, ndirent.de_MTime); 1382 pcl = pdep->de_StartCluster; 1383 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1384 pcl = 0; 1385 putushort(denp[1].deStartCluster, pcl); 1386 putushort(denp[1].deCDate, ndirent.de_CDate); 1387 putushort(denp[1].deCTime, ndirent.de_CTime); 1388 denp[1].deCHundredth = ndirent.de_CHun; 1389 putushort(denp[1].deADate, ndirent.de_ADate); 1390 putushort(denp[1].deMDate, ndirent.de_MDate); 1391 putushort(denp[1].deMTime, ndirent.de_MTime); 1392 if (FAT32(pmp)) { 1393 putushort(denp[0].deHighClust, newcluster >> 16); 1394 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1395 } 1396 1397 error = bwrite(bp); 1398 if (error) 1399 goto bad; 1400 1401 /* 1402 * Now build up a directory entry pointing to the newly allocated 1403 * cluster. This will be written to an empty slot in the parent 1404 * directory. 1405 */ 1406 #ifdef DIAGNOSTIC 1407 if ((cnp->cn_flags & HASBUF) == 0) 1408 panic("msdosfs_mkdir: no name"); 1409 #endif 1410 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1411 if (error) 1412 goto bad; 1413 1414 ndirent.de_Attributes = ATTR_DIRECTORY; 1415 ndirent.de_LowerCase = 0; 1416 ndirent.de_StartCluster = newcluster; 1417 ndirent.de_FileSize = 0; 1418 ndirent.de_dev = pdep->de_dev; 1419 ndirent.de_devvp = pdep->de_devvp; 1420 error = createde(&ndirent, pdep, &dep, cnp); 1421 if (error) 1422 goto bad; 1423 if ((cnp->cn_flags & SAVESTART) == 0) 1424 zfree(namei_zone, cnp->cn_pnbuf); 1425 *ap->a_vpp = DETOV(dep); 1426 return (0); 1427 1428 bad: 1429 clusterfree(pmp, newcluster, NULL); 1430 bad2: 1431 zfree(namei_zone, cnp->cn_pnbuf); 1432 return (error); 1433 } 1434 1435 static int 1436 msdosfs_rmdir(ap) 1437 struct vop_rmdir_args /* { 1438 struct vnode *a_dvp; 1439 struct vnode *a_vp; 1440 struct componentname *a_cnp; 1441 } */ *ap; 1442 { 1443 register struct vnode *vp = ap->a_vp; 1444 register struct vnode *dvp = ap->a_dvp; 1445 register struct componentname *cnp = ap->a_cnp; 1446 register struct denode *ip, *dp; 1447 struct proc *p = cnp->cn_proc; 1448 int error; 1449 1450 ip = VTODE(vp); 1451 dp = VTODE(dvp); 1452 1453 /* 1454 * Verify the directory is empty (and valid). 1455 * (Rmdir ".." won't be valid since 1456 * ".." will contain a reference to 1457 * the current directory and thus be 1458 * non-empty.) 1459 */ 1460 error = 0; 1461 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1462 error = ENOTEMPTY; 1463 goto out; 1464 } 1465 /* 1466 * Delete the entry from the directory. For dos filesystems this 1467 * gets rid of the directory entry on disk, the in memory copy 1468 * still exists but the de_refcnt is <= 0. This prevents it from 1469 * being found by deget(). When the vput() on dep is done we give 1470 * up access and eventually msdosfs_reclaim() will be called which 1471 * will remove it from the denode cache. 1472 */ 1473 error = removede(dp, ip); 1474 if (error) 1475 goto out; 1476 /* 1477 * This is where we decrement the link count in the parent 1478 * directory. Since dos filesystems don't do this we just purge 1479 * the name cache. 1480 */ 1481 cache_purge(dvp); 1482 VOP_UNLOCK(dvp, 0, p); 1483 /* 1484 * Truncate the directory that is being deleted. 1485 */ 1486 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, p); 1487 cache_purge(vp); 1488 1489 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p); 1490 out: 1491 return (error); 1492 } 1493 1494 /* 1495 * DOS filesystems don't know what symlinks are. 1496 */ 1497 static int 1498 msdosfs_symlink(ap) 1499 struct vop_symlink_args /* { 1500 struct vnode *a_dvp; 1501 struct vnode **a_vpp; 1502 struct componentname *a_cnp; 1503 struct vattr *a_vap; 1504 char *a_target; 1505 } */ *ap; 1506 { 1507 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 1508 /* VOP_ABORTOP(ap->a_dvp, ap->a_cnp); ??? */ 1509 return (EOPNOTSUPP); 1510 } 1511 1512 static int 1513 msdosfs_readdir(ap) 1514 struct vop_readdir_args /* { 1515 struct vnode *a_vp; 1516 struct uio *a_uio; 1517 struct ucred *a_cred; 1518 int *a_eofflag; 1519 int *a_ncookies; 1520 u_long **a_cookies; 1521 } */ *ap; 1522 { 1523 int error = 0; 1524 int diff; 1525 long n; 1526 int blsize; 1527 long on; 1528 u_long cn; 1529 u_long fileno; 1530 u_long dirsperblk; 1531 long bias = 0; 1532 daddr_t bn, lbn; 1533 struct buf *bp; 1534 struct denode *dep = VTODE(ap->a_vp); 1535 struct msdosfsmount *pmp = dep->de_pmp; 1536 struct direntry *dentp; 1537 struct dirent dirbuf; 1538 struct uio *uio = ap->a_uio; 1539 u_long *cookies = NULL; 1540 int ncookies = 0; 1541 off_t offset, off; 1542 int chksum = -1; 1543 1544 #ifdef MSDOSFS_DEBUG 1545 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1546 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1547 #endif 1548 1549 /* 1550 * msdosfs_readdir() won't operate properly on regular files since 1551 * it does i/o only with the the filesystem vnode, and hence can 1552 * retrieve the wrong block from the buffer cache for a plain file. 1553 * So, fail attempts to readdir() on a plain file. 1554 */ 1555 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1556 return (ENOTDIR); 1557 1558 /* 1559 * To be safe, initialize dirbuf 1560 */ 1561 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1562 1563 /* 1564 * If the user buffer is smaller than the size of one dos directory 1565 * entry or the file offset is not a multiple of the size of a 1566 * directory entry, then we fail the read. 1567 */ 1568 off = offset = uio->uio_offset; 1569 if (uio->uio_resid < sizeof(struct direntry) || 1570 (offset & (sizeof(struct direntry) - 1))) 1571 return (EINVAL); 1572 1573 if (ap->a_ncookies) { 1574 ncookies = uio->uio_resid / 16; 1575 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1576 M_WAITOK); 1577 *ap->a_cookies = cookies; 1578 *ap->a_ncookies = ncookies; 1579 } 1580 1581 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1582 1583 /* 1584 * If they are reading from the root directory then, we simulate 1585 * the . and .. entries since these don't exist in the root 1586 * directory. We also set the offset bias to make up for having to 1587 * simulate these entries. By this I mean that at file offset 64 we 1588 * read the first entry in the root directory that lives on disk. 1589 */ 1590 if (dep->de_StartCluster == MSDOSFSROOT 1591 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1592 #if 0 1593 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1594 offset); 1595 #endif 1596 bias = 2 * sizeof(struct direntry); 1597 if (offset < bias) { 1598 for (n = (int)offset / sizeof(struct direntry); 1599 n < 2; n++) { 1600 if (FAT32(pmp)) 1601 dirbuf.d_fileno = cntobn(pmp, 1602 pmp->pm_rootdirblk) 1603 * dirsperblk; 1604 else 1605 dirbuf.d_fileno = 1; 1606 dirbuf.d_type = DT_DIR; 1607 switch (n) { 1608 case 0: 1609 dirbuf.d_namlen = 1; 1610 strcpy(dirbuf.d_name, "."); 1611 break; 1612 case 1: 1613 dirbuf.d_namlen = 2; 1614 strcpy(dirbuf.d_name, ".."); 1615 break; 1616 } 1617 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1618 if (uio->uio_resid < dirbuf.d_reclen) 1619 goto out; 1620 error = uiomove((caddr_t) &dirbuf, 1621 dirbuf.d_reclen, uio); 1622 if (error) 1623 goto out; 1624 offset += sizeof(struct direntry); 1625 off = offset; 1626 if (cookies) { 1627 *cookies++ = offset; 1628 if (--ncookies <= 0) 1629 goto out; 1630 } 1631 } 1632 } 1633 } 1634 1635 off = offset; 1636 while (uio->uio_resid > 0) { 1637 lbn = de_cluster(pmp, offset - bias); 1638 on = (offset - bias) & pmp->pm_crbomask; 1639 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1640 diff = dep->de_FileSize - (offset - bias); 1641 if (diff <= 0) 1642 break; 1643 n = min(n, diff); 1644 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1645 if (error) 1646 break; 1647 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1648 if (error) { 1649 brelse(bp); 1650 return (error); 1651 } 1652 n = min(n, blsize - bp->b_resid); 1653 1654 /* 1655 * Convert from dos directory entries to fs-independent 1656 * directory entries. 1657 */ 1658 for (dentp = (struct direntry *)(bp->b_data + on); 1659 (char *)dentp < bp->b_data + on + n; 1660 dentp++, offset += sizeof(struct direntry)) { 1661 #if 0 1662 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1663 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1664 #endif 1665 /* 1666 * If this is an unused entry, we can stop. 1667 */ 1668 if (dentp->deName[0] == SLOT_EMPTY) { 1669 brelse(bp); 1670 goto out; 1671 } 1672 /* 1673 * Skip deleted entries. 1674 */ 1675 if (dentp->deName[0] == SLOT_DELETED) { 1676 chksum = -1; 1677 continue; 1678 } 1679 1680 /* 1681 * Handle Win95 long directory entries 1682 */ 1683 if (dentp->deAttributes == ATTR_WIN95) { 1684 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1685 continue; 1686 chksum = win2unixfn((struct winentry *)dentp, 1687 &dirbuf, chksum, 1688 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1689 pmp->pm_u2w); 1690 continue; 1691 } 1692 1693 /* 1694 * Skip volume labels 1695 */ 1696 if (dentp->deAttributes & ATTR_VOLUME) { 1697 chksum = -1; 1698 continue; 1699 } 1700 /* 1701 * This computation of d_fileno must match 1702 * the computation of va_fileid in 1703 * msdosfs_getattr. 1704 */ 1705 if (dentp->deAttributes & ATTR_DIRECTORY) { 1706 fileno = getushort(dentp->deStartCluster); 1707 if (FAT32(pmp)) 1708 fileno |= getushort(dentp->deHighClust) << 16; 1709 /* if this is the root directory */ 1710 if (fileno == MSDOSFSROOT) 1711 if (FAT32(pmp)) 1712 fileno = cntobn(pmp, 1713 pmp->pm_rootdirblk) 1714 * dirsperblk; 1715 else 1716 fileno = 1; 1717 else 1718 fileno = cntobn(pmp, fileno) * dirsperblk; 1719 dirbuf.d_fileno = fileno; 1720 dirbuf.d_type = DT_DIR; 1721 } else { 1722 dirbuf.d_fileno = offset / sizeof(struct direntry); 1723 dirbuf.d_type = DT_REG; 1724 } 1725 if (chksum != winChksum(dentp->deName)) 1726 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1727 (u_char *)dirbuf.d_name, 1728 dentp->deLowerCase | 1729 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1730 (LCASE_BASE | LCASE_EXT) : 0), 1731 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1732 pmp->pm_d2u, 1733 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1734 pmp->pm_ul); 1735 else 1736 dirbuf.d_name[dirbuf.d_namlen] = 0; 1737 chksum = -1; 1738 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1739 if (uio->uio_resid < dirbuf.d_reclen) { 1740 brelse(bp); 1741 goto out; 1742 } 1743 error = uiomove((caddr_t) &dirbuf, 1744 dirbuf.d_reclen, uio); 1745 if (error) { 1746 brelse(bp); 1747 goto out; 1748 } 1749 if (cookies) { 1750 *cookies++ = offset + sizeof(struct direntry); 1751 if (--ncookies <= 0) { 1752 brelse(bp); 1753 goto out; 1754 } 1755 } 1756 off = offset + sizeof(struct direntry); 1757 } 1758 brelse(bp); 1759 } 1760 out: 1761 /* Subtract unused cookies */ 1762 if (ap->a_ncookies) 1763 *ap->a_ncookies -= ncookies; 1764 1765 uio->uio_offset = off; 1766 1767 /* 1768 * Set the eofflag (NFS uses it) 1769 */ 1770 if (ap->a_eofflag) { 1771 if (dep->de_FileSize - (offset - bias) <= 0) 1772 *ap->a_eofflag = 1; 1773 else 1774 *ap->a_eofflag = 0; 1775 } 1776 return (error); 1777 } 1778 1779 static int 1780 msdosfs_abortop(ap) 1781 struct vop_abortop_args /* { 1782 struct vnode *a_dvp; 1783 struct componentname *a_cnp; 1784 } */ *ap; 1785 { 1786 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 1787 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 1788 return (0); 1789 } 1790 1791 /* 1792 * vp - address of vnode file the file 1793 * bn - which cluster we are interested in mapping to a filesystem block number. 1794 * vpp - returns the vnode for the block special file holding the filesystem 1795 * containing the file of interest 1796 * bnp - address of where to return the filesystem relative block number 1797 */ 1798 static int 1799 msdosfs_bmap(ap) 1800 struct vop_bmap_args /* { 1801 struct vnode *a_vp; 1802 daddr_t a_bn; 1803 struct vnode **a_vpp; 1804 daddr_t *a_bnp; 1805 int *a_runp; 1806 int *a_runb; 1807 } */ *ap; 1808 { 1809 struct denode *dep = VTODE(ap->a_vp); 1810 1811 if (ap->a_vpp != NULL) 1812 *ap->a_vpp = dep->de_devvp; 1813 if (ap->a_bnp == NULL) 1814 return (0); 1815 if (ap->a_runp) { 1816 /* 1817 * Sequential clusters should be counted here. 1818 */ 1819 *ap->a_runp = 0; 1820 } 1821 if (ap->a_runb) { 1822 *ap->a_runb = 0; 1823 } 1824 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0)); 1825 } 1826 1827 static int 1828 msdosfs_strategy(ap) 1829 struct vop_strategy_args /* { 1830 struct vnode *a_vp; 1831 struct buf *a_bp; 1832 } */ *ap; 1833 { 1834 struct buf *bp = ap->a_bp; 1835 struct denode *dep = VTODE(bp->b_vp); 1836 struct vnode *vp; 1837 int error = 0; 1838 1839 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1840 panic("msdosfs_strategy: spec"); 1841 /* 1842 * If we don't already know the filesystem relative block number 1843 * then get it using pcbmap(). If pcbmap() returns the block 1844 * number as -1 then we've got a hole in the file. DOS filesystems 1845 * don't allow files with holes, so we shouldn't ever see this. 1846 */ 1847 if (bp->b_blkno == bp->b_lblkno) { 1848 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0); 1849 if (error) { 1850 bp->b_error = error; 1851 bp->b_flags |= B_ERROR; 1852 biodone(bp); 1853 return (error); 1854 } 1855 if ((long)bp->b_blkno == -1) 1856 vfs_bio_clrbuf(bp); 1857 } 1858 if (bp->b_blkno == -1) { 1859 biodone(bp); 1860 return (0); 1861 } 1862 /* 1863 * Read/write the block from/to the disk that contains the desired 1864 * file block. 1865 */ 1866 vp = dep->de_devvp; 1867 bp->b_dev = vp->v_rdev; 1868 VOP_STRATEGY(vp, bp); 1869 return (0); 1870 } 1871 1872 static int 1873 msdosfs_print(ap) 1874 struct vop_print_args /* { 1875 struct vnode *vp; 1876 } */ *ap; 1877 { 1878 struct denode *dep = VTODE(ap->a_vp); 1879 1880 printf( 1881 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1882 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1883 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1884 lockmgr_printinfo(&dep->de_lock); 1885 printf("\n"); 1886 return (0); 1887 } 1888 1889 static int 1890 msdosfs_pathconf(ap) 1891 struct vop_pathconf_args /* { 1892 struct vnode *a_vp; 1893 int a_name; 1894 int *a_retval; 1895 } */ *ap; 1896 { 1897 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1898 1899 switch (ap->a_name) { 1900 case _PC_LINK_MAX: 1901 *ap->a_retval = 1; 1902 return (0); 1903 case _PC_NAME_MAX: 1904 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1905 return (0); 1906 case _PC_PATH_MAX: 1907 *ap->a_retval = PATH_MAX; 1908 return (0); 1909 case _PC_CHOWN_RESTRICTED: 1910 *ap->a_retval = 1; 1911 return (0); 1912 case _PC_NO_TRUNC: 1913 *ap->a_retval = 0; 1914 return (0); 1915 default: 1916 return (EINVAL); 1917 } 1918 /* NOTREACHED */ 1919 } 1920 1921 /* 1922 * get page routine 1923 * 1924 * XXX By default, wimp out... note that a_offset is ignored (and always 1925 * XXX has been). 1926 */ 1927 int 1928 msdosfs_getpages(ap) 1929 struct vop_getpages_args *ap; 1930 { 1931 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1932 ap->a_reqpage); 1933 } 1934 1935 /* 1936 * put page routine 1937 * 1938 * XXX By default, wimp out... note that a_offset is ignored (and always 1939 * XXX has been). 1940 */ 1941 int 1942 msdosfs_putpages(ap) 1943 struct vop_putpages_args *ap; 1944 { 1945 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1946 ap->a_sync, ap->a_rtvals); 1947 } 1948 1949 /* Global vfs data structures for msdosfs */ 1950 vop_t **msdosfs_vnodeop_p; 1951 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1952 { &vop_default_desc, (vop_t *) vop_defaultop }, 1953 { &vop_abortop_desc, (vop_t *) msdosfs_abortop }, 1954 { &vop_access_desc, (vop_t *) msdosfs_access }, 1955 { &vop_bmap_desc, (vop_t *) msdosfs_bmap }, 1956 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup }, 1957 { &vop_close_desc, (vop_t *) msdosfs_close }, 1958 { &vop_create_desc, (vop_t *) msdosfs_create }, 1959 { &vop_fsync_desc, (vop_t *) msdosfs_fsync }, 1960 { &vop_getattr_desc, (vop_t *) msdosfs_getattr }, 1961 { &vop_inactive_desc, (vop_t *) msdosfs_inactive }, 1962 { &vop_islocked_desc, (vop_t *) vop_stdislocked }, 1963 { &vop_link_desc, (vop_t *) msdosfs_link }, 1964 { &vop_lock_desc, (vop_t *) vop_stdlock }, 1965 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup }, 1966 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir }, 1967 { &vop_mknod_desc, (vop_t *) msdosfs_mknod }, 1968 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf }, 1969 { &vop_print_desc, (vop_t *) msdosfs_print }, 1970 { &vop_read_desc, (vop_t *) msdosfs_read }, 1971 { &vop_readdir_desc, (vop_t *) msdosfs_readdir }, 1972 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim }, 1973 { &vop_remove_desc, (vop_t *) msdosfs_remove }, 1974 { &vop_rename_desc, (vop_t *) msdosfs_rename }, 1975 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir }, 1976 { &vop_setattr_desc, (vop_t *) msdosfs_setattr }, 1977 { &vop_strategy_desc, (vop_t *) msdosfs_strategy }, 1978 { &vop_symlink_desc, (vop_t *) msdosfs_symlink }, 1979 { &vop_unlock_desc, (vop_t *) vop_stdunlock }, 1980 { &vop_write_desc, (vop_t *) msdosfs_write }, 1981 { &vop_getpages_desc, (vop_t *) msdosfs_getpages }, 1982 { &vop_putpages_desc, (vop_t *) msdosfs_putpages }, 1983 { NULL, NULL } 1984 }; 1985 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1986 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1987 1988 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 1989