msdosfs_vnops.c revision 34901
1/* $Id: msdosfs_vnops.c,v 1.66 1998/03/20 02:33:42 kato Exp $ */ 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 <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */ 63#include <sys/malloc.h> 64#include <sys/dirent.h> 65#include <sys/signalvar.h> 66 67#include <vm/vm.h> 68#include <vm/vm_extern.h> 69#include <vm/vm_zone.h> 70#include <vm/vnode_pager.h> 71 72#include <msdosfs/bpb.h> 73#include <msdosfs/direntry.h> 74#include <msdosfs/denode.h> 75#include <msdosfs/msdosfsmount.h> 76#include <msdosfs/fat.h> 77 78/* 79 * Prototypes for MSDOSFS vnode operations 80 */ 81static int msdosfs_create __P((struct vop_create_args *)); 82static int msdosfs_mknod __P((struct vop_mknod_args *)); 83static int msdosfs_close __P((struct vop_close_args *)); 84static int msdosfs_access __P((struct vop_access_args *)); 85static int msdosfs_getattr __P((struct vop_getattr_args *)); 86static int msdosfs_setattr __P((struct vop_setattr_args *)); 87static int msdosfs_read __P((struct vop_read_args *)); 88static int msdosfs_write __P((struct vop_write_args *)); 89static int msdosfs_fsync __P((struct vop_fsync_args *)); 90static int msdosfs_remove __P((struct vop_remove_args *)); 91static int msdosfs_link __P((struct vop_link_args *)); 92static int msdosfs_rename __P((struct vop_rename_args *)); 93static int msdosfs_mkdir __P((struct vop_mkdir_args *)); 94static int msdosfs_rmdir __P((struct vop_rmdir_args *)); 95static int msdosfs_symlink __P((struct vop_symlink_args *)); 96static int msdosfs_readdir __P((struct vop_readdir_args *)); 97static int msdosfs_abortop __P((struct vop_abortop_args *)); 98static int msdosfs_bmap __P((struct vop_bmap_args *)); 99static int msdosfs_strategy __P((struct vop_strategy_args *)); 100static int msdosfs_print __P((struct vop_print_args *)); 101static int msdosfs_pathconf __P((struct vop_pathconf_args *ap)); 102static int msdosfs_getpages __P((struct vop_getpages_args *)); 103static int msdosfs_putpages __P((struct vop_putpages_args *)); 104 105/* 106 * Some general notes: 107 * 108 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 109 * read/written using the vnode for the filesystem. Blocks that represent 110 * the contents of a file are read/written using the vnode for the file 111 * (including directories when they are read/written as files). This 112 * presents problems for the dos filesystem because data that should be in 113 * an inode (if dos had them) resides in the directory itself. Since we 114 * must update directory entries without the benefit of having the vnode 115 * for the directory we must use the vnode for the filesystem. This means 116 * that when a directory is actually read/written (via read, write, or 117 * readdir, or seek) we must use the vnode for the filesystem instead of 118 * the vnode for the directory as would happen in ufs. This is to insure we 119 * retreive the correct block from the buffer cache since the hash value is 120 * based upon the vnode address and the desired block number. 121 */ 122 123/* 124 * Create a regular file. On entry the directory to contain the file being 125 * created is locked. We must release before we return. We must also free 126 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 127 * only if the SAVESTART bit in cn_flags is clear on success. 128 */ 129static int 130msdosfs_create(ap) 131 struct vop_create_args /* { 132 struct vnode *a_dvp; 133 struct vnode **a_vpp; 134 struct componentname *a_cnp; 135 struct vattr *a_vap; 136 } */ *ap; 137{ 138 struct componentname *cnp = ap->a_cnp; 139 struct denode ndirent; 140 struct denode *dep; 141 struct denode *pdep = VTODE(ap->a_dvp); 142 struct timespec ts; 143 int error; 144 145#ifdef MSDOSFS_DEBUG 146 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 147#endif 148 149 /* 150 * If this is the root directory and there is no space left we 151 * can't do anything. This is because the root directory can not 152 * change size. 153 */ 154 if (pdep->de_StartCluster == MSDOSFSROOT 155 && pdep->de_fndoffset >= pdep->de_FileSize) { 156 error = ENOSPC; 157 goto bad; 158 } 159 160 /* 161 * Create a directory entry for the file, then call createde() to 162 * have it installed. NOTE: DOS files are always executable. We 163 * use the absence of the owner write bit to make the file 164 * readonly. 165 */ 166#ifdef DIAGNOSTIC 167 if ((cnp->cn_flags & HASBUF) == 0) 168 panic("msdosfs_create: no name"); 169#endif 170 bzero(&ndirent, sizeof(ndirent)); 171 error = uniqdosname(pdep, cnp, ndirent.de_Name); 172 if (error) 173 goto bad; 174 175 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 176 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 177 ndirent.de_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 vput(ap->a_dvp); 191 *ap->a_vpp = DETOV(dep); 192 return (0); 193 194bad: 195 zfree(namei_zone, cnp->cn_pnbuf); 196 vput(ap->a_dvp); 197 return (error); 198} 199 200static int 201msdosfs_mknod(ap) 202 struct vop_mknod_args /* { 203 struct vnode *a_dvp; 204 struct vnode **a_vpp; 205 struct componentname *a_cnp; 206 struct vattr *a_vap; 207 } */ *ap; 208{ 209 210 switch (ap->a_vap->va_type) { 211 case VDIR: 212 return (msdosfs_mkdir((struct vop_mkdir_args *)ap)); 213 break; 214 215 case VREG: 216 return (msdosfs_create((struct vop_create_args *)ap)); 217 break; 218 219 default: 220 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 221 vput(ap->a_dvp); 222 return (EINVAL); 223 } 224 /* NOTREACHED */ 225} 226 227static int 228msdosfs_close(ap) 229 struct vop_close_args /* { 230 struct vnode *a_vp; 231 int a_fflag; 232 struct ucred *a_cred; 233 struct proc *a_p; 234 } */ *ap; 235{ 236 struct vnode *vp = ap->a_vp; 237 struct denode *dep = VTODE(vp); 238 struct timespec ts; 239 240 simple_lock(&vp->v_interlock); 241 if (vp->v_usecount > 1) { 242 getnanotime(&ts); 243 DETIMES(dep, &ts, &ts, &ts); 244 } 245 simple_unlock(&vp->v_interlock); 246 return 0; 247} 248 249static int 250msdosfs_access(ap) 251 struct vop_access_args /* { 252 struct vnode *a_vp; 253 int a_mode; 254 struct ucred *a_cred; 255 struct proc *a_p; 256 } */ *ap; 257{ 258 struct vnode *vp = ap->a_vp; 259 struct denode *dep = VTODE(ap->a_vp); 260 struct msdosfsmount *pmp = dep->de_pmp; 261 struct ucred *cred = ap->a_cred; 262 mode_t mask, file_mode, mode = ap->a_mode; 263 register gid_t *gp; 264 int i; 265 266 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 267 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 268 file_mode &= pmp->pm_mask; 269 270 /* 271 * Disallow write attempts on read-only file systems; 272 * unless the file is a socket, fifo, or a block or 273 * character device resident on the file system. 274 */ 275 if (mode & VWRITE) { 276 switch (vp->v_type) { 277 case VDIR: 278 case VLNK: 279 case VREG: 280 if (vp->v_mount->mnt_flag & MNT_RDONLY) 281 return (EROFS); 282 break; 283 } 284 } 285 286 /* User id 0 always gets access. */ 287 if (cred->cr_uid == 0) 288 return 0; 289 290 mask = 0; 291 292 /* Otherwise, check the owner. */ 293 if (cred->cr_uid == pmp->pm_uid) { 294 if (mode & VEXEC) 295 mask |= S_IXUSR; 296 if (mode & VREAD) 297 mask |= S_IRUSR; 298 if (mode & VWRITE) 299 mask |= S_IWUSR; 300 return (file_mode & mask) == mask ? 0 : EACCES; 301 } 302 303 /* Otherwise, check the groups. */ 304 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 305 if (pmp->pm_gid == *gp) { 306 if (mode & VEXEC) 307 mask |= S_IXGRP; 308 if (mode & VREAD) 309 mask |= S_IRGRP; 310 if (mode & VWRITE) 311 mask |= S_IWGRP; 312 return (file_mode & mask) == mask ? 0 : EACCES; 313 } 314 315 /* Otherwise, check everyone else. */ 316 if (mode & VEXEC) 317 mask |= S_IXOTH; 318 if (mode & VREAD) 319 mask |= S_IROTH; 320 if (mode & VWRITE) 321 mask |= S_IWOTH; 322 return (file_mode & mask) == mask ? 0 : EACCES; 323} 324 325static int 326msdosfs_getattr(ap) 327 struct vop_getattr_args /* { 328 struct vnode *a_vp; 329 struct vattr *a_vap; 330 struct ucred *a_cred; 331 struct proc *a_p; 332 } */ *ap; 333{ 334 u_int cn; 335 struct denode *dep = VTODE(ap->a_vp); 336 struct msdosfsmount *pmp = dep->de_pmp; 337 struct vattr *vap = ap->a_vap; 338 mode_t mode; 339 struct timespec ts; 340 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 341 u_long fileid; 342 343 getnanotime(&ts); 344 DETIMES(dep, &ts, &ts, &ts); 345 vap->va_fsid = dep->de_dev; 346 /* 347 * The following computation of the fileid must be the same as that 348 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 349 * doesn't work. 350 */ 351 if (dep->de_Attributes & ATTR_DIRECTORY) { 352 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk; 353 if (dep->de_StartCluster == MSDOSFSROOT) 354 fileid = 1; 355 } else { 356 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk; 357 if (dep->de_dirclust == MSDOSFSROOT) 358 fileid = roottobn(pmp, 0) * dirsperblk; 359 fileid += dep->de_diroffset / sizeof(struct direntry); 360 } 361 vap->va_fileid = fileid; 362 if ((dep->de_Attributes & ATTR_READONLY) == 0) 363 mode = S_IRWXU|S_IRWXG|S_IRWXO; 364 else 365 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 366 vap->va_mode = mode & pmp->pm_mask; 367 vap->va_uid = pmp->pm_uid; 368 vap->va_gid = pmp->pm_gid; 369 vap->va_nlink = 1; 370 vap->va_rdev = 0; 371 vap->va_size = dep->de_FileSize; 372 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 373 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 374 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 375 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 376 } else { 377 vap->va_atime = vap->va_mtime; 378 vap->va_ctime = vap->va_mtime; 379 } 380 vap->va_flags = 0; 381 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 382 vap->va_flags |= SF_ARCHIVED; 383 vap->va_gen = 0; 384 vap->va_blocksize = pmp->pm_bpcluster; 385 vap->va_bytes = 386 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 387 vap->va_type = ap->a_vp->v_type; 388 vap->va_filerev = dep->de_modrev; 389 return (0); 390} 391 392static int 393msdosfs_setattr(ap) 394 struct vop_setattr_args /* { 395 struct vnode *a_vp; 396 struct vattr *a_vap; 397 struct ucred *a_cred; 398 struct proc *a_p; 399 } */ *ap; 400{ 401 struct vnode *vp = ap->a_vp; 402 struct denode *dep = VTODE(ap->a_vp); 403 struct msdosfsmount *pmp = dep->de_pmp; 404 struct vattr *vap = ap->a_vap; 405 struct ucred *cred = ap->a_cred; 406 int error = 0; 407 408#ifdef MSDOSFS_DEBUG 409 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 410 ap->a_vp, vap, cred, ap->a_p); 411#endif 412 413 /* 414 * Check for unsettable attributes. 415 */ 416 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 417 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 418 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 419 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 420#ifdef MSDOSFS_DEBUG 421 printf("msdosfs_setattr(): returning EINVAL\n"); 422 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 423 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 424 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 425 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 426 printf(" va_uid %x, va_gid %x\n", 427 vap->va_uid, vap->va_gid); 428#endif 429 return (EINVAL); 430 } 431 if (vap->va_flags != VNOVAL) { 432 if (vp->v_mount->mnt_flag & MNT_RDONLY) 433 return (EROFS); 434 if (cred->cr_uid != pmp->pm_uid && 435 (error = suser(cred, &ap->a_p->p_acflag))) 436 return (error); 437 /* 438 * We are very inconsistent about handling unsupported 439 * attributes. We ignored the the access time and the 440 * read and execute bits. We were strict for the other 441 * attributes. 442 * 443 * Here we are strict, stricter than ufs in not allowing 444 * users to attempt to set SF_SETTABLE bits or anyone to 445 * set unsupported bits. However, we ignore attempts to 446 * set ATTR_ARCHIVE for directories `cp -pr' from a more 447 * sensible file system attempts it a lot. 448 */ 449 if (cred->cr_uid != 0) { 450 if (vap->va_flags & SF_SETTABLE) 451 return EPERM; 452 } 453 if (vap->va_flags & ~SF_ARCHIVED) 454 return EINVAL; 455 if (vap->va_flags & SF_ARCHIVED) 456 dep->de_Attributes &= ~ATTR_ARCHIVE; 457 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 458 dep->de_Attributes |= ATTR_ARCHIVE; 459 dep->de_flag |= DE_MODIFIED; 460 } 461 462 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 463 uid_t uid; 464 gid_t gid; 465 466 if (vp->v_mount->mnt_flag & MNT_RDONLY) 467 return (EROFS); 468 uid = vap->va_uid; 469 if (uid == (uid_t)VNOVAL) 470 uid = pmp->pm_uid; 471 gid = vap->va_gid; 472 if (gid == (gid_t)VNOVAL) 473 gid = pmp->pm_gid; 474 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 475 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 476 (error = suser(cred, &ap->a_p->p_acflag))) 477 return error; 478 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 479 return EINVAL; 480 } 481 482 if (vap->va_size != VNOVAL) { 483 /* 484 * Disallow write attempts on read-only file systems; 485 * unless the file is a socket, fifo, or a block or 486 * character device resident on the file system. 487 */ 488 switch (vp->v_type) { 489 case VDIR: 490 return (EISDIR); 491 case VLNK: 492 case VREG: 493 if (vp->v_mount->mnt_flag & MNT_RDONLY) 494 return (EROFS); 495 break; 496 } 497 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 498 if (error) 499 return error; 500 } 501 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 502 if (vp->v_mount->mnt_flag & MNT_RDONLY) 503 return (EROFS); 504 if (cred->cr_uid != pmp->pm_uid && 505 (error = suser(cred, &ap->a_p->p_acflag)) && 506 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 507 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_p)))) 508 return (error); 509 if (vp->v_type != VDIR) { 510 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 511 vap->va_atime.tv_sec != VNOVAL) 512 unix2dostime(&vap->va_atime, &dep->de_ADate, NULL, NULL); 513 if (vap->va_mtime.tv_sec != VNOVAL) 514 unix2dostime(&vap->va_mtime, &dep->de_MDate, &dep->de_MTime, NULL); 515 dep->de_Attributes |= ATTR_ARCHIVE; 516 dep->de_flag |= DE_MODIFIED; 517 } 518 } 519 /* 520 * DOS files only have the ability to have their writability 521 * attribute set, so we use the owner write bit to set the readonly 522 * attribute. 523 */ 524 if (vap->va_mode != (mode_t)VNOVAL) { 525 if (vp->v_mount->mnt_flag & MNT_RDONLY) 526 return (EROFS); 527 if (cred->cr_uid != pmp->pm_uid && 528 (error = suser(cred, &ap->a_p->p_acflag))) 529 return (error); 530 if (vp->v_type != VDIR) { 531 /* We ignore the read and execute bits. */ 532 if (vap->va_mode & VWRITE) 533 dep->de_Attributes &= ~ATTR_READONLY; 534 else 535 dep->de_Attributes |= ATTR_READONLY; 536 dep->de_flag |= DE_MODIFIED; 537 } 538 } 539 return (deupdat(dep, 1)); 540} 541 542static int 543msdosfs_read(ap) 544 struct vop_read_args /* { 545 struct vnode *a_vp; 546 struct uio *a_uio; 547 int a_ioflag; 548 struct ucred *a_cred; 549 } */ *ap; 550{ 551 int error = 0; 552 int diff; 553 int blsize; 554 int isadir; 555 long n; 556 long on; 557 daddr_t lbn; 558 daddr_t rablock; 559 int rasize; 560 struct buf *bp; 561 struct vnode *vp = ap->a_vp; 562 struct denode *dep = VTODE(vp); 563 struct msdosfsmount *pmp = dep->de_pmp; 564 struct uio *uio = ap->a_uio; 565 566 /* 567 * If they didn't ask for any data, then we are done. 568 */ 569 if (uio->uio_resid == 0) 570 return (0); 571 if (uio->uio_offset < 0) 572 return (EINVAL); 573 574 isadir = dep->de_Attributes & ATTR_DIRECTORY; 575 do { 576 lbn = de_cluster(pmp, uio->uio_offset); 577 on = uio->uio_offset & pmp->pm_crbomask; 578 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 579 diff = dep->de_FileSize - uio->uio_offset; 580 if (diff <= 0) 581 return (0); 582 if (diff < n) 583 n = diff; 584 /* convert cluster # to block # if a directory */ 585 if (isadir) { 586 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 587 if (error) 588 return (error); 589 } 590 /* 591 * If we are operating on a directory file then be sure to 592 * do i/o with the vnode for the filesystem instead of the 593 * vnode for the directory. 594 */ 595 if (isadir) { 596 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 597 } else { 598 rablock = lbn + 1; 599 if (vp->v_lastr + 1 == lbn && 600 de_cn2off(pmp, rablock) < dep->de_FileSize) { 601 rasize = pmp->pm_bpcluster; 602 error = breadn(vp, lbn, pmp->pm_bpcluster, 603 &rablock, &rasize, 1, NOCRED, &bp); 604 } else 605 error = bread(vp, lbn, pmp->pm_bpcluster, 606 NOCRED, &bp); 607 vp->v_lastr = lbn; 608 } 609 n = min(n, pmp->pm_bpcluster - bp->b_resid); 610 if (error) { 611 brelse(bp); 612 return (error); 613 } 614 error = uiomove(bp->b_data + on, (int) n, uio); 615 if (!isadir) 616 dep->de_flag |= DE_ACCESS; 617 brelse(bp); 618 } while (error == 0 && uio->uio_resid > 0 && n != 0); 619 return (error); 620} 621 622/* 623 * Write data to a file or directory. 624 */ 625static int 626msdosfs_write(ap) 627 struct vop_write_args /* { 628 struct vnode *a_vp; 629 struct uio *a_uio; 630 int a_ioflag; 631 struct ucred *a_cred; 632 } */ *ap; 633{ 634 int n; 635 int croffset; 636 int resid; 637 u_long osize; 638 int error = 0; 639 u_long count; 640 daddr_t bn, lastcn; 641 struct buf *bp; 642 int ioflag = ap->a_ioflag; 643 struct uio *uio = ap->a_uio; 644 struct proc *p = uio->uio_procp; 645 struct vnode *vp = ap->a_vp; 646 struct vnode *thisvp; 647 struct denode *dep = VTODE(vp); 648 struct msdosfsmount *pmp = dep->de_pmp; 649 struct ucred *cred = ap->a_cred; 650 651#ifdef MSDOSFS_DEBUG 652 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 653 vp, uio, ioflag, cred); 654 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 655 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 656#endif 657 658 switch (vp->v_type) { 659 case VREG: 660 if (ioflag & IO_APPEND) 661 uio->uio_offset = dep->de_FileSize; 662 thisvp = vp; 663 break; 664 case VDIR: 665 return EISDIR; 666 default: 667 panic("msdosfs_write(): bad file type"); 668 } 669 670 if (uio->uio_offset < 0) 671 return (EINVAL); 672 673 if (uio->uio_resid == 0) 674 return (0); 675 676 /* 677 * If they've exceeded their filesize limit, tell them about it. 678 */ 679 if (p && 680 ((uio->uio_offset + uio->uio_resid) > 681 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 682 psignal(p, SIGXFSZ); 683 return (EFBIG); 684 } 685 686 /* 687 * If the offset we are starting the write at is beyond the end of 688 * the file, then they've done a seek. Unix filesystems allow 689 * files with holes in them, DOS doesn't so we must fill the hole 690 * with zeroed blocks. 691 */ 692 if (uio->uio_offset > dep->de_FileSize) { 693 error = deextend(dep, uio->uio_offset, cred); 694 if (error) 695 return (error); 696 } 697 698 /* 699 * Remember some values in case the write fails. 700 */ 701 resid = uio->uio_resid; 702 osize = dep->de_FileSize; 703 704 /* 705 * If we write beyond the end of the file, extend it to its ultimate 706 * size ahead of the time to hopefully get a contiguous area. 707 */ 708 if (uio->uio_offset + resid > osize) { 709 count = de_clcount(pmp, uio->uio_offset + resid) - 710 de_clcount(pmp, osize); 711 error = extendfile(dep, count, NULL, NULL, 0); 712 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 713 goto errexit; 714 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 715 } else 716 lastcn = de_clcount(pmp, osize) - 1; 717 718 do { 719 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 720 error = ENOSPC; 721 break; 722 } 723 724 croffset = uio->uio_offset & pmp->pm_crbomask; 725 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 726 if (uio->uio_offset + n > dep->de_FileSize) { 727 dep->de_FileSize = uio->uio_offset + n; 728 /* The object size needs to be set before buffer is allocated */ 729 vnode_pager_setsize(vp, dep->de_FileSize); 730 } 731 732 bn = de_cluster(pmp, uio->uio_offset); 733 if ((uio->uio_offset & pmp->pm_crbomask) == 0 734 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 735 > de_cluster(pmp, uio->uio_offset) 736 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 737 /* 738 * If either the whole cluster gets written, 739 * or we write the cluster from its start beyond EOF, 740 * then no need to read data from disk. 741 */ 742 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 743 clrbuf(bp); 744 /* 745 * Do the bmap now, since pcbmap needs buffers 746 * for the fat table. (see msdosfs_strategy) 747 */ 748 if (bp->b_blkno == bp->b_lblkno) { 749 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 750 0, 0); 751 if (error) 752 bp->b_blkno = -1; 753 } 754 if (bp->b_blkno == -1) { 755 brelse(bp); 756 if (!error) 757 error = EIO; /* XXX */ 758 break; 759 } 760 } else { 761 /* 762 * The block we need to write into exists, so read it in. 763 */ 764 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 765 if (error) { 766 brelse(bp); 767 break; 768 } 769 } 770 771 /* 772 * Should these vnode_pager_* functions be done on dir 773 * files? 774 */ 775 776 /* 777 * Copy the data from user space into the buf header. 778 */ 779 error = uiomove(bp->b_data + croffset, n, uio); 780 781 /* 782 * If they want this synchronous then write it and wait for 783 * it. Otherwise, if on a cluster boundary write it 784 * asynchronously so we can move on to the next block 785 * without delay. Otherwise do a delayed write because we 786 * may want to write somemore into the block later. 787 */ 788 if (ioflag & IO_SYNC) 789 (void) bwrite(bp); 790 else if (n + croffset == pmp->pm_bpcluster) 791 bawrite(bp); 792 else 793 bdwrite(bp); 794 dep->de_flag |= DE_UPDATE; 795 } while (error == 0 && uio->uio_resid > 0); 796 797 /* 798 * If the write failed and they want us to, truncate the file back 799 * to the size it was before the write was attempted. 800 */ 801errexit: 802 if (error) { 803 if (ioflag & IO_UNIT) { 804 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 805 uio->uio_offset -= resid - uio->uio_resid; 806 uio->uio_resid = resid; 807 } else { 808 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 809 if (uio->uio_resid != resid) 810 error = 0; 811 } 812 } else if (ioflag & IO_SYNC) 813 error = deupdat(dep, 1); 814 return (error); 815} 816 817/* 818 * Flush the blocks of a file to disk. 819 * 820 * This function is worthless for vnodes that represent directories. Maybe we 821 * could just do a sync if they try an fsync on a directory file. 822 */ 823static int 824msdosfs_fsync(ap) 825 struct vop_fsync_args /* { 826 struct vnode *a_vp; 827 struct ucred *a_cred; 828 int a_waitfor; 829 struct proc *a_p; 830 } */ *ap; 831{ 832 struct vnode *vp = ap->a_vp; 833 int s; 834 struct buf *bp, *nbp; 835 836 /* 837 * Flush all dirty buffers associated with a vnode. 838 */ 839loop: 840 s = splbio(); 841 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 842 nbp = bp->b_vnbufs.le_next; 843 if ((bp->b_flags & B_BUSY)) 844 continue; 845 if ((bp->b_flags & B_DELWRI) == 0) 846 panic("msdosfs_fsync: not dirty"); 847 bremfree(bp); 848 bp->b_flags |= B_BUSY; 849 splx(s); 850 (void) bwrite(bp); 851 goto loop; 852 } 853 while (vp->v_numoutput) { 854 vp->v_flag |= VBWAIT; 855 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 856 } 857#ifdef DIAGNOSTIC 858 if (vp->v_dirtyblkhd.lh_first) { 859 vprint("msdosfs_fsync: dirty", vp); 860 goto loop; 861 } 862#endif 863 splx(s); 864 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 865} 866 867static int 868msdosfs_remove(ap) 869 struct vop_remove_args /* { 870 struct vnode *a_dvp; 871 struct vnode *a_vp; 872 struct componentname *a_cnp; 873 } */ *ap; 874{ 875 int error; 876 struct denode *dep = VTODE(ap->a_vp); 877 struct denode *ddep = VTODE(ap->a_dvp); 878 879 if (ap->a_vp->v_type == VDIR) 880 error = EPERM; 881 else 882 error = removede(ddep, dep); 883#ifdef MSDOSFS_DEBUG 884 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 885#endif 886 if (ddep == dep) 887 vrele(ap->a_vp); 888 else 889 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 890 * via vrele() */ 891 vput(ap->a_dvp); 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 */ 900static int 901msdosfs_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 VOP_ABORTOP(ap->a_tdvp, ap->a_cnp); 909 vput(ap->a_tdvp); 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 */ 964static int 965msdosfs_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; 1017abortit: 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 | LK_RETRY, 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 & pmp->pm_crbomask; 1241 } 1242 reinsert(ip); 1243 if (newparent) 1244 VOP_UNLOCK(fdvp, 0, p); 1245 } 1246 1247 /* 1248 * If we moved a directory to a new parent directory, then we must 1249 * fixup the ".." entry in the moved directory. 1250 */ 1251 if (doingdirectory && newparent) { 1252 cn = ip->de_StartCluster; 1253 if (cn == MSDOSFSROOT) { 1254 /* this should never happen */ 1255 panic("msdosfs_rename(): updating .. in root directory?"); 1256 } else 1257 bn = cntobn(pmp, cn); 1258 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1259 NOCRED, &bp); 1260 if (error) { 1261 /* XXX should really panic here, fs is corrupt */ 1262 brelse(bp); 1263 VOP_UNLOCK(fvp, 0, p); 1264 goto bad; 1265 } 1266 dotdotp = (struct direntry *)bp->b_data + 1; 1267 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1268 if (FAT32(pmp)) 1269 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1270 error = bwrite(bp); 1271 if (error) { 1272 /* XXX should really panic here, fs is corrupt */ 1273 VOP_UNLOCK(fvp, 0, p); 1274 goto bad; 1275 } 1276 } 1277 1278 VOP_UNLOCK(fvp, 0, p); 1279bad: 1280 if (xp) 1281 vput(tvp); 1282 vput(tdvp); 1283out: 1284 ip->de_flag &= ~DE_RENAME; 1285 vrele(fdvp); 1286 vrele(fvp); 1287 return (error); 1288 1289} 1290 1291static struct { 1292 struct direntry dot; 1293 struct direntry dotdot; 1294} dosdirtemplate = { 1295 { ". ", " ", /* the . entry */ 1296 ATTR_DIRECTORY, /* file attribute */ 1297 0, /* reserved */ 1298 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1299 { 0, 0 }, /* access date */ 1300 { 0, 0 }, /* high bits of start cluster */ 1301 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1302 { 0, 0 }, /* startcluster */ 1303 { 0, 0, 0, 0 } /* filesize */ 1304 }, 1305 { ".. ", " ", /* the .. entry */ 1306 ATTR_DIRECTORY, /* file attribute */ 1307 0, /* reserved */ 1308 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1309 { 0, 0 }, /* access date */ 1310 { 0, 0 }, /* high bits of start cluster */ 1311 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1312 { 0, 0 }, /* startcluster */ 1313 { 0, 0, 0, 0 } /* filesize */ 1314 } 1315}; 1316 1317static int 1318msdosfs_mkdir(ap) 1319 struct vop_mkdir_args /* { 1320 struct vnode *a_dvp; 1321 struvt vnode **a_vpp; 1322 struvt componentname *a_cnp; 1323 struct vattr *a_vap; 1324 } */ *ap; 1325{ 1326 struct componentname *cnp = ap->a_cnp; 1327 struct denode ndirent; 1328 struct denode *dep; 1329 struct denode *pdep = VTODE(ap->a_dvp); 1330 int error; 1331 int bn; 1332 u_long newcluster, pcl; 1333 struct direntry *denp; 1334 struct msdosfsmount *pmp = pdep->de_pmp; 1335 struct buf *bp; 1336 struct timespec ts; 1337 1338 /* 1339 * If this is the root directory and there is no space left we 1340 * can't do anything. This is because the root directory can not 1341 * change size. 1342 */ 1343 if (pdep->de_StartCluster == MSDOSFSROOT 1344 && pdep->de_fndoffset >= pdep->de_FileSize) { 1345 error = ENOSPC; 1346 goto bad2; 1347 } 1348 1349 /* 1350 * Allocate a cluster to hold the about to be created directory. 1351 */ 1352 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1353 if (error) 1354 goto bad2; 1355 1356 bzero(&ndirent, sizeof(ndirent)); 1357 ndirent.de_pmp = pmp; 1358 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1359 getnanotime(&ts); 1360 DETIMES(&ndirent, &ts, &ts, &ts); 1361 1362 /* 1363 * Now fill the cluster with the "." and ".." entries. And write 1364 * the cluster to disk. This way it is there for the parent 1365 * directory to be pointing at if there were a crash. 1366 */ 1367 bn = cntobn(pmp, newcluster); 1368 /* always succeeds */ 1369 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1370 bzero(bp->b_data, pmp->pm_bpcluster); 1371 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1372 denp = (struct direntry *)bp->b_data; 1373 putushort(denp[0].deStartCluster, newcluster); 1374 putushort(denp[0].deCDate, ndirent.de_CDate); 1375 putushort(denp[0].deCTime, ndirent.de_CTime); 1376 denp[0].deCHundredth = ndirent.de_CHun; 1377 putushort(denp[0].deADate, ndirent.de_ADate); 1378 putushort(denp[0].deMDate, ndirent.de_MDate); 1379 putushort(denp[0].deMTime, ndirent.de_MTime); 1380 pcl = pdep->de_StartCluster; 1381 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1382 pcl = 0; 1383 putushort(denp[1].deStartCluster, pcl); 1384 putushort(denp[1].deCDate, ndirent.de_CDate); 1385 putushort(denp[1].deCTime, ndirent.de_CTime); 1386 denp[1].deCHundredth = ndirent.de_CHun; 1387 putushort(denp[1].deADate, ndirent.de_ADate); 1388 putushort(denp[1].deMDate, ndirent.de_MDate); 1389 putushort(denp[1].deMTime, ndirent.de_MTime); 1390 if (FAT32(pmp)) { 1391 putushort(denp[0].deHighClust, newcluster >> 16); 1392 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1393 } 1394 1395 error = bwrite(bp); 1396 if (error) 1397 goto bad; 1398 1399 /* 1400 * Now build up a directory entry pointing to the newly allocated 1401 * cluster. This will be written to an empty slot in the parent 1402 * directory. 1403 */ 1404#ifdef DIAGNOSTIC 1405 if ((cnp->cn_flags & HASBUF) == 0) 1406 panic("msdosfs_mkdir: no name"); 1407#endif 1408 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1409 if (error) 1410 goto bad; 1411 1412 ndirent.de_Attributes = ATTR_DIRECTORY; 1413 ndirent.de_StartCluster = newcluster; 1414 ndirent.de_FileSize = 0; 1415 ndirent.de_dev = pdep->de_dev; 1416 ndirent.de_devvp = pdep->de_devvp; 1417 error = createde(&ndirent, pdep, &dep, cnp); 1418 if (error) 1419 goto bad; 1420 if ((cnp->cn_flags & SAVESTART) == 0) 1421 zfree(namei_zone, cnp->cn_pnbuf); 1422 vput(ap->a_dvp); 1423 *ap->a_vpp = DETOV(dep); 1424 return (0); 1425 1426bad: 1427 clusterfree(pmp, newcluster, NULL); 1428bad2: 1429 zfree(namei_zone, cnp->cn_pnbuf); 1430 vput(ap->a_dvp); 1431 return (error); 1432} 1433 1434static int 1435msdosfs_rmdir(ap) 1436 struct vop_rmdir_args /* { 1437 struct vnode *a_dvp; 1438 struct vnode *a_vp; 1439 struct componentname *a_cnp; 1440 } */ *ap; 1441{ 1442 register struct vnode *vp = ap->a_vp; 1443 register struct vnode *dvp = ap->a_dvp; 1444 register struct componentname *cnp = ap->a_cnp; 1445 register struct denode *ip, *dp; 1446 int error; 1447 1448 ip = VTODE(vp); 1449 dp = VTODE(dvp); 1450 1451 /* 1452 * Verify the directory is empty (and valid). 1453 * (Rmdir ".." won't be valid since 1454 * ".." will contain a reference to 1455 * the current directory and thus be 1456 * non-empty.) 1457 */ 1458 error = 0; 1459 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1460 error = ENOTEMPTY; 1461 goto out; 1462 } 1463 /* 1464 * Delete the entry from the directory. For dos filesystems this 1465 * gets rid of the directory entry on disk, the in memory copy 1466 * still exists but the de_refcnt is <= 0. This prevents it from 1467 * being found by deget(). When the vput() on dep is done we give 1468 * up access and eventually msdosfs_reclaim() will be called which 1469 * will remove it from the denode cache. 1470 */ 1471 error = removede(dp, ip); 1472 if (error) 1473 goto out; 1474 /* 1475 * This is where we decrement the link count in the parent 1476 * directory. Since dos filesystems don't do this we just purge 1477 * the name cache and let go of the parent directory denode. 1478 */ 1479 cache_purge(dvp); 1480 vput(dvp); 1481 dvp = NULL; 1482 /* 1483 * Truncate the directory that is being deleted. 1484 */ 1485 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, cnp->cn_proc); 1486 cache_purge(vp); 1487out: 1488 if (dvp) 1489 vput(dvp); 1490 vput(vp); 1491 return (error); 1492} 1493 1494/* 1495 * DOS filesystems don't know what symlinks are. 1496 */ 1497static int 1498msdosfs_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 vput(ap->a_dvp); 1510 return (EOPNOTSUPP); 1511} 1512 1513static int 1514msdosfs_readdir(ap) 1515 struct vop_readdir_args /* { 1516 struct vnode *a_vp; 1517 struct uio *a_uio; 1518 struct ucred *a_cred; 1519 int *a_eofflag; 1520 int *a_ncookies; 1521 u_long **a_cookies; 1522 } */ *ap; 1523{ 1524 int error = 0; 1525 int diff; 1526 long n; 1527 int blsize; 1528 long on; 1529 u_long cn; 1530 u_long fileno; 1531 u_long dirsperblk; 1532 long bias = 0; 1533 daddr_t bn, lbn; 1534 struct buf *bp; 1535 struct denode *dep = VTODE(ap->a_vp); 1536 struct msdosfsmount *pmp = dep->de_pmp; 1537 struct direntry *dentp; 1538 struct dirent dirbuf; 1539 struct uio *uio = ap->a_uio; 1540 u_long *cookies = NULL; 1541 int ncookies = 0; 1542 off_t offset, off; 1543 int chksum = -1; 1544 1545#ifdef MSDOSFS_DEBUG 1546 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1547 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1548#endif 1549 1550 /* 1551 * msdosfs_readdir() won't operate properly on regular files since 1552 * it does i/o only with the the filesystem vnode, and hence can 1553 * retrieve the wrong block from the buffer cache for a plain file. 1554 * So, fail attempts to readdir() on a plain file. 1555 */ 1556 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1557 return (ENOTDIR); 1558 1559 /* 1560 * To be safe, initialize dirbuf 1561 */ 1562 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1563 1564 /* 1565 * If the user buffer is smaller than the size of one dos directory 1566 * entry or the file offset is not a multiple of the size of a 1567 * directory entry, then we fail the read. 1568 */ 1569 off = offset = uio->uio_offset; 1570 if (uio->uio_resid < sizeof(struct direntry) || 1571 (offset & (sizeof(struct direntry) - 1))) 1572 return (EINVAL); 1573 1574 if (ap->a_ncookies) { 1575 ncookies = uio->uio_resid / 16; 1576 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1577 M_WAITOK); 1578 *ap->a_cookies = cookies; 1579 *ap->a_ncookies = ncookies; 1580 } 1581 1582 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1583 1584 /* 1585 * If they are reading from the root directory then, we simulate 1586 * the . and .. entries since these don't exist in the root 1587 * directory. We also set the offset bias to make up for having to 1588 * simulate these entries. By this I mean that at file offset 64 we 1589 * read the first entry in the root directory that lives on disk. 1590 */ 1591 if (dep->de_StartCluster == MSDOSFSROOT 1592 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1593#if 0 1594 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1595 offset); 1596#endif 1597 bias = 2 * sizeof(struct direntry); 1598 if (offset < bias) { 1599 for (n = (int)offset / sizeof(struct direntry); 1600 n < 2; n++) { 1601 if (FAT32(pmp)) 1602 dirbuf.d_fileno = cntobn(pmp, 1603 pmp->pm_rootdirblk) 1604 * dirsperblk; 1605 else 1606 dirbuf.d_fileno = 1; 1607 dirbuf.d_type = DT_DIR; 1608 switch (n) { 1609 case 0: 1610 dirbuf.d_namlen = 1; 1611 strcpy(dirbuf.d_name, "."); 1612 break; 1613 case 1: 1614 dirbuf.d_namlen = 2; 1615 strcpy(dirbuf.d_name, ".."); 1616 break; 1617 } 1618 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1619 if (uio->uio_resid < dirbuf.d_reclen) 1620 goto out; 1621 error = uiomove((caddr_t) &dirbuf, 1622 dirbuf.d_reclen, uio); 1623 if (error) 1624 goto out; 1625 offset += sizeof(struct direntry); 1626 off = offset; 1627 if (cookies) { 1628 *cookies++ = offset; 1629 if (--ncookies <= 0) 1630 goto out; 1631 } 1632 } 1633 } 1634 } 1635 1636 off = offset; 1637 while (uio->uio_resid > 0) { 1638 lbn = de_cluster(pmp, offset - bias); 1639 on = (offset - bias) & pmp->pm_crbomask; 1640 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1641 diff = dep->de_FileSize - (offset - bias); 1642 if (diff <= 0) 1643 break; 1644 n = min(n, diff); 1645 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1646 if (error) 1647 break; 1648 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1649 if (error) { 1650 brelse(bp); 1651 return (error); 1652 } 1653 n = min(n, blsize - bp->b_resid); 1654 1655 /* 1656 * Convert from dos directory entries to fs-independent 1657 * directory entries. 1658 */ 1659 for (dentp = (struct direntry *)(bp->b_data + on); 1660 (char *)dentp < bp->b_data + on + n; 1661 dentp++, offset += sizeof(struct direntry)) { 1662#if 0 1663 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1664 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1665#endif 1666 /* 1667 * If this is an unused entry, we can stop. 1668 */ 1669 if (dentp->deName[0] == SLOT_EMPTY) { 1670 brelse(bp); 1671 goto out; 1672 } 1673 /* 1674 * Skip deleted entries. 1675 */ 1676 if (dentp->deName[0] == SLOT_DELETED) { 1677 chksum = -1; 1678 continue; 1679 } 1680 1681 /* 1682 * Handle Win95 long directory entries 1683 */ 1684 if (dentp->deAttributes == ATTR_WIN95) { 1685 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1686 continue; 1687 chksum = win2unixfn((struct winentry *)dentp, 1688 &dirbuf, chksum, 1689 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1690 pmp->pm_u2w); 1691 continue; 1692 } 1693 1694 /* 1695 * Skip volume labels 1696 */ 1697 if (dentp->deAttributes & ATTR_VOLUME) { 1698 chksum = -1; 1699 continue; 1700 } 1701 /* 1702 * This computation of d_fileno must match 1703 * the computation of va_fileid in 1704 * msdosfs_getattr. 1705 */ 1706 if (dentp->deAttributes & ATTR_DIRECTORY) { 1707 fileno = getushort(dentp->deStartCluster); 1708 if (FAT32(pmp)) 1709 fileno |= getushort(dentp->deHighClust) << 16; 1710 /* if this is the root directory */ 1711 if (fileno == MSDOSFSROOT) 1712 if (FAT32(pmp)) 1713 fileno = cntobn(pmp, 1714 pmp->pm_rootdirblk) 1715 * dirsperblk; 1716 else 1717 fileno = 1; 1718 else 1719 fileno = cntobn(pmp, fileno) * dirsperblk; 1720 dirbuf.d_fileno = fileno; 1721 dirbuf.d_type = DT_DIR; 1722 } else { 1723 dirbuf.d_fileno = offset / sizeof(struct direntry); 1724 dirbuf.d_type = DT_REG; 1725 } 1726 if (chksum != winChksum(dentp->deName)) 1727 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1728 (u_char *)dirbuf.d_name, 1729 pmp->pm_flags & MSDOSFSMNT_SHORTNAME, 1730 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1731 pmp->pm_d2u, 1732 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1733 pmp->pm_ul); 1734 else 1735 dirbuf.d_name[dirbuf.d_namlen] = 0; 1736 chksum = -1; 1737 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1738 if (uio->uio_resid < dirbuf.d_reclen) { 1739 brelse(bp); 1740 goto out; 1741 } 1742 error = uiomove((caddr_t) &dirbuf, 1743 dirbuf.d_reclen, uio); 1744 if (error) { 1745 brelse(bp); 1746 goto out; 1747 } 1748 if (cookies) { 1749 *cookies++ = offset + sizeof(struct direntry); 1750 if (--ncookies <= 0) { 1751 brelse(bp); 1752 goto out; 1753 } 1754 } 1755 off = offset + sizeof(struct direntry); 1756 } 1757 brelse(bp); 1758 } 1759out: 1760 /* Subtract unused cookies */ 1761 if (ap->a_ncookies) 1762 *ap->a_ncookies -= ncookies; 1763 1764 uio->uio_offset = off; 1765 1766 /* 1767 * Set the eofflag (NFS uses it) 1768 */ 1769 if (ap->a_eofflag) 1770 if (dep->de_FileSize - (offset - bias) <= 0) 1771 *ap->a_eofflag = 1; 1772 else 1773 *ap->a_eofflag = 0; 1774 1775 return (error); 1776} 1777 1778static int 1779msdosfs_abortop(ap) 1780 struct vop_abortop_args /* { 1781 struct vnode *a_dvp; 1782 struct componentname *a_cnp; 1783 } */ *ap; 1784{ 1785 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 1786 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 1787 return (0); 1788} 1789 1790/* 1791 * vp - address of vnode file the file 1792 * bn - which cluster we are interested in mapping to a filesystem block number. 1793 * vpp - returns the vnode for the block special file holding the filesystem 1794 * containing the file of interest 1795 * bnp - address of where to return the filesystem relative block number 1796 */ 1797static int 1798msdosfs_bmap(ap) 1799 struct vop_bmap_args /* { 1800 struct vnode *a_vp; 1801 daddr_t a_bn; 1802 struct vnode **a_vpp; 1803 daddr_t *a_bnp; 1804 int *a_runp; 1805 int *a_runb; 1806 } */ *ap; 1807{ 1808 struct denode *dep = VTODE(ap->a_vp); 1809 struct msdosfsmount *pmp = dep->de_pmp; 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 1827static int 1828msdosfs_strategy(ap) 1829 struct vop_strategy_args /* { 1830 struct buf *a_bp; 1831 } */ *ap; 1832{ 1833 struct buf *bp = ap->a_bp; 1834 struct denode *dep = VTODE(bp->b_vp); 1835 struct vnode *vp; 1836 int error = 0; 1837 1838 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1839 panic("msdosfs_strategy: spec"); 1840 /* 1841 * If we don't already know the filesystem relative block number 1842 * then get it using pcbmap(). If pcbmap() returns the block 1843 * number as -1 then we've got a hole in the file. DOS filesystems 1844 * don't allow files with holes, so we shouldn't ever see this. 1845 */ 1846 if (bp->b_blkno == bp->b_lblkno) { 1847 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0); 1848 if (error) { 1849 bp->b_error = error; 1850 bp->b_flags |= B_ERROR; 1851 biodone(bp); 1852 return (error); 1853 } 1854 if ((long)bp->b_blkno == -1) 1855 vfs_bio_clrbuf(bp); 1856 } 1857 if (bp->b_blkno == -1) { 1858 biodone(bp); 1859 return (0); 1860 } 1861 /* 1862 * Read/write the block from/to the disk that contains the desired 1863 * file block. 1864 */ 1865 vp = dep->de_devvp; 1866 bp->b_dev = vp->v_rdev; 1867 VOCALL(vp->v_op, VOFFSET(vop_strategy), ap); 1868 return (0); 1869} 1870 1871static int 1872msdosfs_print(ap) 1873 struct vop_print_args /* { 1874 struct vnode *vp; 1875 } */ *ap; 1876{ 1877 struct denode *dep = VTODE(ap->a_vp); 1878 1879 printf( 1880 "tag VT_MSDOSFS, startcluster %d, dircluster %ld, diroffset %ld ", 1881 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1882 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1883 lockmgr_printinfo(&dep->de_lock); 1884 printf("\n"); 1885 return (0); 1886} 1887 1888static int 1889msdosfs_pathconf(ap) 1890 struct vop_pathconf_args /* { 1891 struct vnode *a_vp; 1892 int a_name; 1893 int *a_retval; 1894 } */ *ap; 1895{ 1896 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1897 1898 switch (ap->a_name) { 1899 case _PC_LINK_MAX: 1900 *ap->a_retval = 1; 1901 return (0); 1902 case _PC_NAME_MAX: 1903 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1904 return (0); 1905 case _PC_PATH_MAX: 1906 *ap->a_retval = PATH_MAX; 1907 return (0); 1908 case _PC_CHOWN_RESTRICTED: 1909 *ap->a_retval = 1; 1910 return (0); 1911 case _PC_NO_TRUNC: 1912 *ap->a_retval = 0; 1913 return (0); 1914 default: 1915 return (EINVAL); 1916 } 1917 /* NOTREACHED */ 1918} 1919 1920/* 1921 * get page routine 1922 * 1923 * XXX By default, wimp out... note that a_offset is ignored (and always 1924 * XXX has been). 1925 */ 1926int 1927msdosfs_getpages(ap) 1928 struct vop_getpages_args *ap; 1929{ 1930 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1931 ap->a_reqpage); 1932} 1933 1934/* 1935 * put page routine 1936 * 1937 * XXX By default, wimp out... note that a_offset is ignored (and always 1938 * XXX has been). 1939 */ 1940int 1941msdosfs_putpages(ap) 1942 struct vop_putpages_args *ap; 1943{ 1944 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1945 ap->a_sync, ap->a_rtvals); 1946} 1947 1948/* Global vfs data structures for msdosfs */ 1949vop_t **msdosfs_vnodeop_p; 1950static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1951 { &vop_default_desc, (vop_t *) vop_defaultop }, 1952 { &vop_abortop_desc, (vop_t *) msdosfs_abortop }, 1953 { &vop_access_desc, (vop_t *) msdosfs_access }, 1954 { &vop_bmap_desc, (vop_t *) msdosfs_bmap }, 1955 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup }, 1956 { &vop_close_desc, (vop_t *) msdosfs_close }, 1957 { &vop_create_desc, (vop_t *) msdosfs_create }, 1958 { &vop_fsync_desc, (vop_t *) msdosfs_fsync }, 1959 { &vop_getattr_desc, (vop_t *) msdosfs_getattr }, 1960 { &vop_inactive_desc, (vop_t *) msdosfs_inactive }, 1961 { &vop_islocked_desc, (vop_t *) vop_stdislocked }, 1962 { &vop_link_desc, (vop_t *) msdosfs_link }, 1963 { &vop_lock_desc, (vop_t *) vop_stdlock }, 1964 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup }, 1965 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir }, 1966 { &vop_mknod_desc, (vop_t *) msdosfs_mknod }, 1967 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf }, 1968 { &vop_print_desc, (vop_t *) msdosfs_print }, 1969 { &vop_read_desc, (vop_t *) msdosfs_read }, 1970 { &vop_readdir_desc, (vop_t *) msdosfs_readdir }, 1971 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim }, 1972 { &vop_remove_desc, (vop_t *) msdosfs_remove }, 1973 { &vop_rename_desc, (vop_t *) msdosfs_rename }, 1974 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir }, 1975 { &vop_setattr_desc, (vop_t *) msdosfs_setattr }, 1976 { &vop_strategy_desc, (vop_t *) msdosfs_strategy }, 1977 { &vop_symlink_desc, (vop_t *) msdosfs_symlink }, 1978 { &vop_unlock_desc, (vop_t *) vop_stdunlock }, 1979 { &vop_write_desc, (vop_t *) msdosfs_write }, 1980 { &vop_getpages_desc, (vop_t *) msdosfs_getpages }, 1981 { &vop_putpages_desc, (vop_t *) msdosfs_putpages }, 1982 { NULL, NULL } 1983}; 1984static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1985 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1986 1987VNODEOP_SET(msdosfs_vnodeop_opv_desc); 1988