1 /* $Id: msdosfs_vnops.c,v 1.67 1998/03/26 20:52:58 phk 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 */ 81 static int msdosfs_create __P((struct vop_create_args *)); 82 static int msdosfs_mknod __P((struct vop_mknod_args *)); 83 static int msdosfs_close __P((struct vop_close_args *)); 84 static int msdosfs_access __P((struct vop_access_args *)); 85 static int msdosfs_getattr __P((struct vop_getattr_args *)); 86 static int msdosfs_setattr __P((struct vop_setattr_args *)); 87 static int msdosfs_read __P((struct vop_read_args *)); 88 static int msdosfs_write __P((struct vop_write_args *)); 89 static int msdosfs_fsync __P((struct vop_fsync_args *)); 90 static int msdosfs_remove __P((struct vop_remove_args *)); 91 static int msdosfs_link __P((struct vop_link_args *)); 92 static int msdosfs_rename __P((struct vop_rename_args *)); 93 static int msdosfs_mkdir __P((struct vop_mkdir_args *)); 94 static int msdosfs_rmdir __P((struct vop_rmdir_args *)); 95 static int msdosfs_symlink __P((struct vop_symlink_args *)); 96 static int msdosfs_readdir __P((struct vop_readdir_args *)); 97 static int msdosfs_abortop __P((struct vop_abortop_args *)); 98 static int msdosfs_bmap __P((struct vop_bmap_args *)); 99 static int msdosfs_strategy __P((struct vop_strategy_args *)); 100 static int msdosfs_print __P((struct vop_print_args *)); 101 static int msdosfs_pathconf __P((struct vop_pathconf_args *ap)); 102 static int msdosfs_getpages __P((struct vop_getpages_args *)); 103 static 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 */ 129 static int 130 msdosfs_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 *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 } 281 } 282 283 /* User id 0 always gets access. */ 284 if (cred->cr_uid == 0) 285 return 0; 286 287 mask = 0; 288 289 /* Otherwise, check the owner. */ 290 if (cred->cr_uid == pmp->pm_uid) { 291 if (mode & VEXEC) 292 mask |= S_IXUSR; 293 if (mode & VREAD) 294 mask |= S_IRUSR; 295 if (mode & VWRITE) 296 mask |= S_IWUSR; 297 return (file_mode & mask) == mask ? 0 : EACCES; 298 } 299 300 /* Otherwise, check the groups. */ 301 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 302 if (pmp->pm_gid == *gp) { 303 if (mode & VEXEC) 304 mask |= S_IXGRP; 305 if (mode & VREAD) 306 mask |= S_IRGRP; 307 if (mode & VWRITE) 308 mask |= S_IWGRP; 309 return (file_mode & mask) == mask ? 0 : EACCES; 310 } 311 312 /* Otherwise, check everyone else. */ 313 if (mode & VEXEC) 314 mask |= S_IXOTH; 315 if (mode & VREAD) 316 mask |= S_IROTH; 317 if (mode & VWRITE) 318 mask |= S_IWOTH; 319 return (file_mode & mask) == mask ? 0 : EACCES; 320 } 321 322 static int 323 msdosfs_getattr(ap) 324 struct vop_getattr_args /* { 325 struct vnode *a_vp; 326 struct vattr *a_vap; 327 struct ucred *a_cred; 328 struct proc *a_p; 329 } */ *ap; 330 { 331 u_int cn; 332 struct denode *dep = VTODE(ap->a_vp); 333 struct msdosfsmount *pmp = dep->de_pmp; 334 struct vattr *vap = ap->a_vap; 335 mode_t mode; 336 struct timespec ts; 337 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 338 u_long fileid; 339 340 getnanotime(&ts); 341 DETIMES(dep, &ts, &ts, &ts); 342 vap->va_fsid = dep->de_dev; 343 /* 344 * The following computation of the fileid must be the same as that 345 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 346 * doesn't work. 347 */ 348 if (dep->de_Attributes & ATTR_DIRECTORY) { 349 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk; 350 if (dep->de_StartCluster == MSDOSFSROOT) 351 fileid = 1; 352 } else { 353 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk; 354 if (dep->de_dirclust == MSDOSFSROOT) 355 fileid = roottobn(pmp, 0) * dirsperblk; 356 fileid += dep->de_diroffset / sizeof(struct direntry); 357 } 358 vap->va_fileid = fileid; 359 if ((dep->de_Attributes & ATTR_READONLY) == 0) 360 mode = S_IRWXU|S_IRWXG|S_IRWXO; 361 else 362 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 363 vap->va_mode = mode & pmp->pm_mask; 364 vap->va_uid = pmp->pm_uid; 365 vap->va_gid = pmp->pm_gid; 366 vap->va_nlink = 1; 367 vap->va_rdev = 0; 368 vap->va_size = dep->de_FileSize; 369 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 370 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 371 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 372 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 373 } else { 374 vap->va_atime = vap->va_mtime; 375 vap->va_ctime = vap->va_mtime; 376 } 377 vap->va_flags = 0; 378 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 379 vap->va_flags |= SF_ARCHIVED; 380 vap->va_gen = 0; 381 vap->va_blocksize = pmp->pm_bpcluster; 382 vap->va_bytes = 383 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 384 vap->va_type = ap->a_vp->v_type; 385 vap->va_filerev = dep->de_modrev; 386 return (0); 387 } 388 389 static int 390 msdosfs_setattr(ap) 391 struct vop_setattr_args /* { 392 struct vnode *a_vp; 393 struct vattr *a_vap; 394 struct ucred *a_cred; 395 struct proc *a_p; 396 } */ *ap; 397 { 398 struct vnode *vp = ap->a_vp; 399 struct denode *dep = VTODE(ap->a_vp); 400 struct msdosfsmount *pmp = dep->de_pmp; 401 struct vattr *vap = ap->a_vap; 402 struct ucred *cred = ap->a_cred; 403 int error = 0; 404 405 #ifdef MSDOSFS_DEBUG 406 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 407 ap->a_vp, vap, cred, ap->a_p); 408 #endif 409 410 /* 411 * Check for unsettable attributes. 412 */ 413 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 414 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 415 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 416 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 417 #ifdef MSDOSFS_DEBUG 418 printf("msdosfs_setattr(): returning EINVAL\n"); 419 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 420 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 421 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 422 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 423 printf(" va_uid %x, va_gid %x\n", 424 vap->va_uid, vap->va_gid); 425 #endif 426 return (EINVAL); 427 } 428 if (vap->va_flags != VNOVAL) { 429 if (vp->v_mount->mnt_flag & MNT_RDONLY) 430 return (EROFS); 431 if (cred->cr_uid != pmp->pm_uid && 432 (error = suser(cred, &ap->a_p->p_acflag))) 433 return (error); 434 /* 435 * We are very inconsistent about handling unsupported 436 * attributes. We ignored the the access time and the 437 * read and execute bits. We were strict for the other 438 * attributes. 439 * 440 * Here we are strict, stricter than ufs in not allowing 441 * users to attempt to set SF_SETTABLE bits or anyone to 442 * set unsupported bits. However, we ignore attempts to 443 * set ATTR_ARCHIVE for directories `cp -pr' from a more 444 * sensible file system attempts it a lot. 445 */ 446 if (cred->cr_uid != 0) { 447 if (vap->va_flags & SF_SETTABLE) 448 return EPERM; 449 } 450 if (vap->va_flags & ~SF_ARCHIVED) 451 return EINVAL; 452 if (vap->va_flags & SF_ARCHIVED) 453 dep->de_Attributes &= ~ATTR_ARCHIVE; 454 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 455 dep->de_Attributes |= ATTR_ARCHIVE; 456 dep->de_flag |= DE_MODIFIED; 457 } 458 459 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 460 uid_t uid; 461 gid_t gid; 462 463 if (vp->v_mount->mnt_flag & MNT_RDONLY) 464 return (EROFS); 465 uid = vap->va_uid; 466 if (uid == (uid_t)VNOVAL) 467 uid = pmp->pm_uid; 468 gid = vap->va_gid; 469 if (gid == (gid_t)VNOVAL) 470 gid = pmp->pm_gid; 471 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 472 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 473 (error = suser(cred, &ap->a_p->p_acflag))) 474 return error; 475 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 476 return EINVAL; 477 } 478 479 if (vap->va_size != VNOVAL) { 480 /* 481 * Disallow write attempts on read-only file systems; 482 * unless the file is a socket, fifo, or a block or 483 * character device resident on the file system. 484 */ 485 switch (vp->v_type) { 486 case VDIR: 487 return (EISDIR); 488 case VLNK: 489 case VREG: 490 if (vp->v_mount->mnt_flag & MNT_RDONLY) 491 return (EROFS); 492 break; 493 } 494 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 495 if (error) 496 return error; 497 } 498 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 499 if (vp->v_mount->mnt_flag & MNT_RDONLY) 500 return (EROFS); 501 if (cred->cr_uid != pmp->pm_uid && 502 (error = suser(cred, &ap->a_p->p_acflag)) && 503 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 504 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_p)))) 505 return (error); 506 if (vp->v_type != VDIR) { 507 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 508 vap->va_atime.tv_sec != VNOVAL) 509 unix2dostime(&vap->va_atime, &dep->de_ADate, NULL, NULL); 510 if (vap->va_mtime.tv_sec != VNOVAL) 511 unix2dostime(&vap->va_mtime, &dep->de_MDate, &dep->de_MTime, NULL); 512 dep->de_Attributes |= ATTR_ARCHIVE; 513 dep->de_flag |= DE_MODIFIED; 514 } 515 } 516 /* 517 * DOS files only have the ability to have their writability 518 * attribute set, so we use the owner write bit to set the readonly 519 * attribute. 520 */ 521 if (vap->va_mode != (mode_t)VNOVAL) { 522 if (vp->v_mount->mnt_flag & MNT_RDONLY) 523 return (EROFS); 524 if (cred->cr_uid != pmp->pm_uid && 525 (error = suser(cred, &ap->a_p->p_acflag))) 526 return (error); 527 if (vp->v_type != VDIR) { 528 /* We ignore the read and execute bits. */ 529 if (vap->va_mode & VWRITE) 530 dep->de_Attributes &= ~ATTR_READONLY; 531 else 532 dep->de_Attributes |= ATTR_READONLY; 533 dep->de_flag |= DE_MODIFIED; 534 } 535 } 536 return (deupdat(dep, 1)); 537 } 538 539 static int 540 msdosfs_read(ap) 541 struct vop_read_args /* { 542 struct vnode *a_vp; 543 struct uio *a_uio; 544 int a_ioflag; 545 struct ucred *a_cred; 546 } */ *ap; 547 { 548 int error = 0; 549 int diff; 550 int blsize; 551 int isadir; 552 long n; 553 long on; 554 daddr_t lbn; 555 daddr_t rablock; 556 int rasize; 557 struct buf *bp; 558 struct vnode *vp = ap->a_vp; 559 struct denode *dep = VTODE(vp); 560 struct msdosfsmount *pmp = dep->de_pmp; 561 struct uio *uio = ap->a_uio; 562 563 /* 564 * If they didn't ask for any data, then we are done. 565 */ 566 if (uio->uio_resid == 0) 567 return (0); 568 if (uio->uio_offset < 0) 569 return (EINVAL); 570 571 isadir = dep->de_Attributes & ATTR_DIRECTORY; 572 do { 573 lbn = de_cluster(pmp, uio->uio_offset); 574 on = uio->uio_offset & pmp->pm_crbomask; 575 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 576 diff = dep->de_FileSize - uio->uio_offset; 577 if (diff <= 0) 578 return (0); 579 if (diff < n) 580 n = diff; 581 /* convert cluster # to block # if a directory */ 582 if (isadir) { 583 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 584 if (error) 585 return (error); 586 } 587 /* 588 * If we are operating on a directory file then be sure to 589 * do i/o with the vnode for the filesystem instead of the 590 * vnode for the directory. 591 */ 592 if (isadir) { 593 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 594 } else { 595 rablock = lbn + 1; 596 if (vp->v_lastr + 1 == lbn && 597 de_cn2off(pmp, rablock) < dep->de_FileSize) { 598 rasize = pmp->pm_bpcluster; 599 error = breadn(vp, lbn, pmp->pm_bpcluster, 600 &rablock, &rasize, 1, NOCRED, &bp); 601 } else 602 error = bread(vp, lbn, pmp->pm_bpcluster, 603 NOCRED, &bp); 604 vp->v_lastr = lbn; 605 } 606 n = min(n, pmp->pm_bpcluster - bp->b_resid); 607 if (error) { 608 brelse(bp); 609 return (error); 610 } 611 error = uiomove(bp->b_data + on, (int) n, uio); 612 if (!isadir) 613 dep->de_flag |= DE_ACCESS; 614 brelse(bp); 615 } while (error == 0 && uio->uio_resid > 0 && n != 0); 616 return (error); 617 } 618 619 /* 620 * Write data to a file or directory. 621 */ 622 static int 623 msdosfs_write(ap) 624 struct vop_write_args /* { 625 struct vnode *a_vp; 626 struct uio *a_uio; 627 int a_ioflag; 628 struct ucred *a_cred; 629 } */ *ap; 630 { 631 int n; 632 int croffset; 633 int resid; 634 u_long osize; 635 int error = 0; 636 u_long count; 637 daddr_t bn, lastcn; 638 struct buf *bp; 639 int ioflag = ap->a_ioflag; 640 struct uio *uio = ap->a_uio; 641 struct proc *p = uio->uio_procp; 642 struct vnode *vp = ap->a_vp; 643 struct vnode *thisvp; 644 struct denode *dep = VTODE(vp); 645 struct msdosfsmount *pmp = dep->de_pmp; 646 struct ucred *cred = ap->a_cred; 647 648 #ifdef MSDOSFS_DEBUG 649 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 650 vp, uio, ioflag, cred); 651 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 652 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 653 #endif 654 655 switch (vp->v_type) { 656 case VREG: 657 if (ioflag & IO_APPEND) 658 uio->uio_offset = dep->de_FileSize; 659 thisvp = vp; 660 break; 661 case VDIR: 662 return EISDIR; 663 default: 664 panic("msdosfs_write(): bad file type"); 665 } 666 667 if (uio->uio_offset < 0) 668 return (EINVAL); 669 670 if (uio->uio_resid == 0) 671 return (0); 672 673 /* 674 * If they've exceeded their filesize limit, tell them about it. 675 */ 676 if (p && 677 ((uio->uio_offset + uio->uio_resid) > 678 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 679 psignal(p, SIGXFSZ); 680 return (EFBIG); 681 } 682 683 /* 684 * If the offset we are starting the write at is beyond the end of 685 * the file, then they've done a seek. Unix filesystems allow 686 * files with holes in them, DOS doesn't so we must fill the hole 687 * with zeroed blocks. 688 */ 689 if (uio->uio_offset > dep->de_FileSize) { 690 error = deextend(dep, uio->uio_offset, cred); 691 if (error) 692 return (error); 693 } 694 695 /* 696 * Remember some values in case the write fails. 697 */ 698 resid = uio->uio_resid; 699 osize = dep->de_FileSize; 700 701 /* 702 * If we write beyond the end of the file, extend it to its ultimate 703 * size ahead of the time to hopefully get a contiguous area. 704 */ 705 if (uio->uio_offset + resid > osize) { 706 count = de_clcount(pmp, uio->uio_offset + resid) - 707 de_clcount(pmp, osize); 708 error = extendfile(dep, count, NULL, NULL, 0); 709 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 710 goto errexit; 711 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 712 } else 713 lastcn = de_clcount(pmp, osize) - 1; 714 715 do { 716 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 717 error = ENOSPC; 718 break; 719 } 720 721 croffset = uio->uio_offset & pmp->pm_crbomask; 722 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 723 if (uio->uio_offset + n > dep->de_FileSize) { 724 dep->de_FileSize = uio->uio_offset + n; 725 /* The object size needs to be set before buffer is allocated */ 726 vnode_pager_setsize(vp, dep->de_FileSize); 727 } 728 729 bn = de_cluster(pmp, uio->uio_offset); 730 if ((uio->uio_offset & pmp->pm_crbomask) == 0 731 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 732 > de_cluster(pmp, uio->uio_offset) 733 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 734 /* 735 * If either the whole cluster gets written, 736 * or we write the cluster from its start beyond EOF, 737 * then no need to read data from disk. 738 */ 739 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 740 clrbuf(bp); 741 /* 742 * Do the bmap now, since pcbmap needs buffers 743 * for the fat table. (see msdosfs_strategy) 744 */ 745 if (bp->b_blkno == bp->b_lblkno) { 746 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 747 0, 0); 748 if (error) 749 bp->b_blkno = -1; 750 } 751 if (bp->b_blkno == -1) { 752 brelse(bp); 753 if (!error) 754 error = EIO; /* XXX */ 755 break; 756 } 757 } else { 758 /* 759 * The block we need to write into exists, so read it in. 760 */ 761 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 762 if (error) { 763 brelse(bp); 764 break; 765 } 766 } 767 768 /* 769 * Should these vnode_pager_* functions be done on dir 770 * files? 771 */ 772 773 /* 774 * Copy the data from user space into the buf header. 775 */ 776 error = uiomove(bp->b_data + croffset, n, uio); 777 778 /* 779 * If they want this synchronous then write it and wait for 780 * it. Otherwise, if on a cluster boundary write it 781 * asynchronously so we can move on to the next block 782 * without delay. Otherwise do a delayed write because we 783 * may want to write somemore into the block later. 784 */ 785 if (ioflag & IO_SYNC) 786 (void) bwrite(bp); 787 else if (n + croffset == pmp->pm_bpcluster) 788 bawrite(bp); 789 else 790 bdwrite(bp); 791 dep->de_flag |= DE_UPDATE; 792 } while (error == 0 && uio->uio_resid > 0); 793 794 /* 795 * If the write failed and they want us to, truncate the file back 796 * to the size it was before the write was attempted. 797 */ 798 errexit: 799 if (error) { 800 if (ioflag & IO_UNIT) { 801 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 802 uio->uio_offset -= resid - uio->uio_resid; 803 uio->uio_resid = resid; 804 } else { 805 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 806 if (uio->uio_resid != resid) 807 error = 0; 808 } 809 } else if (ioflag & IO_SYNC) 810 error = deupdat(dep, 1); 811 return (error); 812 } 813 814 /* 815 * Flush the blocks of a file to disk. 816 * 817 * This function is worthless for vnodes that represent directories. Maybe we 818 * could just do a sync if they try an fsync on a directory file. 819 */ 820 static int 821 msdosfs_fsync(ap) 822 struct vop_fsync_args /* { 823 struct vnode *a_vp; 824 struct ucred *a_cred; 825 int a_waitfor; 826 struct proc *a_p; 827 } */ *ap; 828 { 829 struct vnode *vp = ap->a_vp; 830 int s; 831 struct buf *bp, *nbp; 832 833 /* 834 * Flush all dirty buffers associated with a vnode. 835 */ 836 loop: 837 s = splbio(); 838 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 839 nbp = bp->b_vnbufs.le_next; 840 if ((bp->b_flags & B_BUSY)) 841 continue; 842 if ((bp->b_flags & B_DELWRI) == 0) 843 panic("msdosfs_fsync: not dirty"); 844 bremfree(bp); 845 bp->b_flags |= B_BUSY; 846 splx(s); 847 (void) bwrite(bp); 848 goto loop; 849 } 850 while (vp->v_numoutput) { 851 vp->v_flag |= VBWAIT; 852 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 853 } 854 #ifdef DIAGNOSTIC 855 if (vp->v_dirtyblkhd.lh_first) { 856 vprint("msdosfs_fsync: dirty", vp); 857 goto loop; 858 } 859 #endif 860 splx(s); 861 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 862 } 863 864 static int 865 msdosfs_remove(ap) 866 struct vop_remove_args /* { 867 struct vnode *a_dvp; 868 struct vnode *a_vp; 869 struct componentname *a_cnp; 870 } */ *ap; 871 { 872 struct denode *dep = VTODE(ap->a_vp); 873 struct denode *ddep = VTODE(ap->a_dvp); 874 int error; 875 876 if (ap->a_vp->v_type == VDIR) 877 error = EPERM; 878 else 879 error = removede(ddep, dep); 880 #ifdef MSDOSFS_DEBUG 881 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 882 #endif 883 return (error); 884 } 885 886 /* 887 * DOS filesystems don't know what links are. But since we already called 888 * msdosfs_lookup() with create and lockparent, the parent is locked so we 889 * have to free it before we return the error. 890 */ 891 static int 892 msdosfs_link(ap) 893 struct vop_link_args /* { 894 struct vnode *a_tdvp; 895 struct vnode *a_vp; 896 struct componentname *a_cnp; 897 } */ *ap; 898 { 899 VOP_ABORTOP(ap->a_tdvp, ap->a_cnp); 900 return (EOPNOTSUPP); 901 } 902 903 /* 904 * Renames on files require moving the denode to a new hash queue since the 905 * denode's location is used to compute which hash queue to put the file 906 * in. Unless it is a rename in place. For example "mv a b". 907 * 908 * What follows is the basic algorithm: 909 * 910 * if (file move) { 911 * if (dest file exists) { 912 * remove dest file 913 * } 914 * if (dest and src in same directory) { 915 * rewrite name in existing directory slot 916 * } else { 917 * write new entry in dest directory 918 * update offset and dirclust in denode 919 * move denode to new hash chain 920 * clear old directory entry 921 * } 922 * } else { 923 * directory move 924 * if (dest directory exists) { 925 * if (dest is not empty) { 926 * return ENOTEMPTY 927 * } 928 * remove dest directory 929 * } 930 * if (dest and src in same directory) { 931 * rewrite name in existing entry 932 * } else { 933 * be sure dest is not a child of src directory 934 * write entry in dest directory 935 * update "." and ".." in moved directory 936 * clear old directory entry for moved directory 937 * } 938 * } 939 * 940 * On entry: 941 * source's parent directory is unlocked 942 * source file or directory is unlocked 943 * destination's parent directory is locked 944 * destination file or directory is locked if it exists 945 * 946 * On exit: 947 * all denodes should be released 948 * 949 * Notes: 950 * I'm not sure how the memory containing the pathnames pointed at by the 951 * componentname structures is freed, there may be some memory bleeding 952 * for each rename done. 953 */ 954 static int 955 msdosfs_rename(ap) 956 struct vop_rename_args /* { 957 struct vnode *a_fdvp; 958 struct vnode *a_fvp; 959 struct componentname *a_fcnp; 960 struct vnode *a_tdvp; 961 struct vnode *a_tvp; 962 struct componentname *a_tcnp; 963 } */ *ap; 964 { 965 struct vnode *tdvp = ap->a_tdvp; 966 struct vnode *fvp = ap->a_fvp; 967 struct vnode *fdvp = ap->a_fdvp; 968 struct vnode *tvp = ap->a_tvp; 969 struct componentname *tcnp = ap->a_tcnp; 970 struct componentname *fcnp = ap->a_fcnp; 971 struct proc *p = fcnp->cn_proc; 972 struct denode *ip, *xp, *dp, *zp; 973 u_char toname[11], oldname[11]; 974 u_long from_diroffset, to_diroffset; 975 u_char to_count; 976 int doingdirectory = 0, newparent = 0; 977 int error; 978 u_long cn; 979 daddr_t bn; 980 struct denode *fddep; /* from file's parent directory */ 981 struct denode *fdep; /* from file or directory */ 982 struct denode *tddep; /* to file's parent directory */ 983 struct denode *tdep; /* to file or directory */ 984 struct msdosfsmount *pmp; 985 struct direntry *dotdotp; 986 struct buf *bp; 987 988 fddep = VTODE(ap->a_fdvp); 989 fdep = VTODE(ap->a_fvp); 990 tddep = VTODE(ap->a_tdvp); 991 tdep = tvp ? VTODE(tvp) : NULL; 992 pmp = fddep->de_pmp; 993 994 pmp = VFSTOMSDOSFS(fdvp->v_mount); 995 996 #ifdef DIAGNOSTIC 997 if ((tcnp->cn_flags & HASBUF) == 0 || 998 (fcnp->cn_flags & HASBUF) == 0) 999 panic("msdosfs_rename: no name"); 1000 #endif 1001 /* 1002 * Check for cross-device rename. 1003 */ 1004 if ((fvp->v_mount != tdvp->v_mount) || 1005 (tvp && (fvp->v_mount != tvp->v_mount))) { 1006 error = EXDEV; 1007 abortit: 1008 VOP_ABORTOP(tdvp, tcnp); 1009 if (tdvp == tvp) 1010 vrele(tdvp); 1011 else 1012 vput(tdvp); 1013 if (tvp) 1014 vput(tvp); 1015 VOP_ABORTOP(fdvp, fcnp); 1016 vrele(fdvp); 1017 vrele(fvp); 1018 return (error); 1019 } 1020 1021 /* 1022 * If source and dest are the same, do nothing. 1023 */ 1024 if (tvp == fvp) { 1025 error = 0; 1026 goto abortit; 1027 } 1028 1029 error = vn_lock(fvp, LK_EXCLUSIVE | LK_RETRY, p); 1030 if (error) 1031 goto abortit; 1032 dp = VTODE(fdvp); 1033 ip = VTODE(fvp); 1034 1035 /* 1036 * Be sure we are not renaming ".", "..", or an alias of ".". This 1037 * leads to a crippled directory tree. It's pretty tough to do a 1038 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1039 * doesn't work if the ".." entry is missing. 1040 */ 1041 if (ip->de_Attributes & ATTR_DIRECTORY) { 1042 /* 1043 * Avoid ".", "..", and aliases of "." for obvious reasons. 1044 */ 1045 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1046 dp == ip || 1047 (fcnp->cn_flags & ISDOTDOT) || 1048 (tcnp->cn_flags & ISDOTDOT) || 1049 (ip->de_flag & DE_RENAME)) { 1050 VOP_UNLOCK(fvp, 0, p); 1051 error = EINVAL; 1052 goto abortit; 1053 } 1054 ip->de_flag |= DE_RENAME; 1055 doingdirectory++; 1056 } 1057 1058 /* 1059 * When the target exists, both the directory 1060 * and target vnodes are returned locked. 1061 */ 1062 dp = VTODE(tdvp); 1063 xp = tvp ? VTODE(tvp) : NULL; 1064 /* 1065 * Remember direntry place to use for destination 1066 */ 1067 to_diroffset = dp->de_fndoffset; 1068 to_count = dp->de_fndcnt; 1069 1070 /* 1071 * If ".." must be changed (ie the directory gets a new 1072 * parent) then the source directory must not be in the 1073 * directory heirarchy above the target, as this would 1074 * orphan everything below the source directory. Also 1075 * the user must have write permission in the source so 1076 * as to be able to change "..". We must repeat the call 1077 * to namei, as the parent directory is unlocked by the 1078 * call to doscheckpath(). 1079 */ 1080 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 1081 VOP_UNLOCK(fvp, 0, p); 1082 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1083 newparent = 1; 1084 vrele(fdvp); 1085 if (doingdirectory && newparent) { 1086 if (error) /* write access check above */ 1087 goto bad; 1088 if (xp != NULL) 1089 vput(tvp); 1090 /* 1091 * doscheckpath() vput()'s dp, 1092 * so we have to do a relookup afterwards 1093 */ 1094 error = doscheckpath(ip, dp); 1095 if (error) 1096 goto out; 1097 if ((tcnp->cn_flags & SAVESTART) == 0) 1098 panic("msdosfs_rename: lost to startdir"); 1099 error = relookup(tdvp, &tvp, tcnp); 1100 if (error) 1101 goto out; 1102 dp = VTODE(tdvp); 1103 xp = tvp ? VTODE(tvp) : NULL; 1104 } 1105 1106 if (xp != NULL) { 1107 /* 1108 * Target must be empty if a directory and have no links 1109 * to it. Also, ensure source and target are compatible 1110 * (both directories, or both not directories). 1111 */ 1112 if (xp->de_Attributes & ATTR_DIRECTORY) { 1113 if (!dosdirempty(xp)) { 1114 error = ENOTEMPTY; 1115 goto bad; 1116 } 1117 if (!doingdirectory) { 1118 error = ENOTDIR; 1119 goto bad; 1120 } 1121 cache_purge(tdvp); 1122 } else if (doingdirectory) { 1123 error = EISDIR; 1124 goto bad; 1125 } 1126 error = removede(dp, xp); 1127 if (error) 1128 goto bad; 1129 vput(tvp); 1130 xp = NULL; 1131 } 1132 1133 /* 1134 * Convert the filename in tcnp into a dos filename. We copy this 1135 * into the denode and directory entry for the destination 1136 * file/directory. 1137 */ 1138 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1139 if (error) 1140 goto abortit; 1141 1142 /* 1143 * Since from wasn't locked at various places above, 1144 * have to do a relookup here. 1145 */ 1146 fcnp->cn_flags &= ~MODMASK; 1147 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1148 if ((fcnp->cn_flags & SAVESTART) == 0) 1149 panic("msdosfs_rename: lost from startdir"); 1150 if (!newparent) 1151 VOP_UNLOCK(tdvp, 0, p); 1152 (void) relookup(fdvp, &fvp, fcnp); 1153 if (fvp == NULL) { 1154 /* 1155 * From name has disappeared. 1156 */ 1157 if (doingdirectory) 1158 panic("rename: lost dir entry"); 1159 vrele(ap->a_fvp); 1160 if (newparent) 1161 VOP_UNLOCK(tdvp, 0, p); 1162 vrele(tdvp); 1163 return 0; 1164 } 1165 xp = VTODE(fvp); 1166 zp = VTODE(fdvp); 1167 from_diroffset = zp->de_fndoffset; 1168 1169 /* 1170 * Ensure that the directory entry still exists and has not 1171 * changed till now. If the source is a file the entry may 1172 * have been unlinked or renamed. In either case there is 1173 * no further work to be done. If the source is a directory 1174 * then it cannot have been rmdir'ed or renamed; this is 1175 * prohibited by the DE_RENAME flag. 1176 */ 1177 if (xp != ip) { 1178 if (doingdirectory) 1179 panic("rename: lost dir entry"); 1180 vrele(ap->a_fvp); 1181 VOP_UNLOCK(fvp, 0, p); 1182 if (newparent) 1183 VOP_UNLOCK(fdvp, 0, p); 1184 xp = NULL; 1185 } else { 1186 vrele(fvp); 1187 xp = NULL; 1188 1189 /* 1190 * First write a new entry in the destination 1191 * directory and mark the entry in the source directory 1192 * as deleted. Then move the denode to the correct hash 1193 * chain for its new location in the filesystem. And, if 1194 * we moved a directory, then update its .. entry to point 1195 * to the new parent directory. 1196 */ 1197 bcopy(ip->de_Name, oldname, 11); 1198 bcopy(toname, ip->de_Name, 11); /* update denode */ 1199 dp->de_fndoffset = to_diroffset; 1200 dp->de_fndcnt = to_count; 1201 error = createde(ip, dp, (struct denode **)0, tcnp); 1202 if (error) { 1203 bcopy(oldname, ip->de_Name, 11); 1204 if (newparent) 1205 VOP_UNLOCK(fdvp, 0, p); 1206 VOP_UNLOCK(fvp, 0, p); 1207 goto bad; 1208 } 1209 ip->de_refcnt++; 1210 zp->de_fndoffset = from_diroffset; 1211 error = removede(zp, ip); 1212 if (error) { 1213 /* XXX should really panic here, fs is corrupt */ 1214 if (newparent) 1215 VOP_UNLOCK(fdvp, 0, p); 1216 VOP_UNLOCK(fvp, 0, p); 1217 goto bad; 1218 } 1219 if (!doingdirectory) { 1220 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1221 &ip->de_dirclust, 0); 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 (ip->de_dirclust != MSDOSFSROOT) 1230 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1231 } 1232 reinsert(ip); 1233 if (newparent) 1234 VOP_UNLOCK(fdvp, 0, p); 1235 } 1236 1237 /* 1238 * If we moved a directory to a new parent directory, then we must 1239 * fixup the ".." entry in the moved directory. 1240 */ 1241 if (doingdirectory && newparent) { 1242 cn = ip->de_StartCluster; 1243 if (cn == MSDOSFSROOT) { 1244 /* this should never happen */ 1245 panic("msdosfs_rename(): updating .. in root directory?"); 1246 } else 1247 bn = cntobn(pmp, cn); 1248 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1249 NOCRED, &bp); 1250 if (error) { 1251 /* XXX should really panic here, fs is corrupt */ 1252 brelse(bp); 1253 VOP_UNLOCK(fvp, 0, p); 1254 goto bad; 1255 } 1256 dotdotp = (struct direntry *)bp->b_data + 1; 1257 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1258 if (FAT32(pmp)) 1259 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1260 error = bwrite(bp); 1261 if (error) { 1262 /* XXX should really panic here, fs is corrupt */ 1263 VOP_UNLOCK(fvp, 0, p); 1264 goto bad; 1265 } 1266 } 1267 1268 VOP_UNLOCK(fvp, 0, p); 1269 bad: 1270 if (xp) 1271 vput(tvp); 1272 vput(tdvp); 1273 out: 1274 ip->de_flag &= ~DE_RENAME; 1275 vrele(fdvp); 1276 vrele(fvp); 1277 return (error); 1278 1279 } 1280 1281 static struct { 1282 struct direntry dot; 1283 struct direntry dotdot; 1284 } dosdirtemplate = { 1285 { ". ", " ", /* the . entry */ 1286 ATTR_DIRECTORY, /* file attribute */ 1287 0, /* reserved */ 1288 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1289 { 0, 0 }, /* access date */ 1290 { 0, 0 }, /* high bits of start cluster */ 1291 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1292 { 0, 0 }, /* startcluster */ 1293 { 0, 0, 0, 0 } /* filesize */ 1294 }, 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 }; 1306 1307 static int 1308 msdosfs_mkdir(ap) 1309 struct vop_mkdir_args /* { 1310 struct vnode *a_dvp; 1311 struvt vnode **a_vpp; 1312 struvt componentname *a_cnp; 1313 struct vattr *a_vap; 1314 } */ *ap; 1315 { 1316 struct componentname *cnp = ap->a_cnp; 1317 struct denode *dep; 1318 struct denode *pdep = VTODE(ap->a_dvp); 1319 struct direntry *denp; 1320 struct msdosfsmount *pmp = pdep->de_pmp; 1321 struct buf *bp; 1322 u_long newcluster, pcl; 1323 int bn; 1324 int error; 1325 struct denode ndirent; 1326 struct timespec ts; 1327 1328 /* 1329 * If this is the root directory and there is no space left we 1330 * can't do anything. This is because the root directory can not 1331 * change size. 1332 */ 1333 if (pdep->de_StartCluster == MSDOSFSROOT 1334 && pdep->de_fndoffset >= pdep->de_FileSize) { 1335 error = ENOSPC; 1336 goto bad2; 1337 } 1338 1339 /* 1340 * Allocate a cluster to hold the about to be created directory. 1341 */ 1342 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1343 if (error) 1344 goto bad2; 1345 1346 bzero(&ndirent, sizeof(ndirent)); 1347 ndirent.de_pmp = pmp; 1348 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1349 getnanotime(&ts); 1350 DETIMES(&ndirent, &ts, &ts, &ts); 1351 1352 /* 1353 * Now fill the cluster with the "." and ".." entries. And write 1354 * the cluster to disk. This way it is there for the parent 1355 * directory to be pointing at if there were a crash. 1356 */ 1357 bn = cntobn(pmp, newcluster); 1358 /* always succeeds */ 1359 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1360 bzero(bp->b_data, pmp->pm_bpcluster); 1361 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1362 denp = (struct direntry *)bp->b_data; 1363 putushort(denp[0].deStartCluster, newcluster); 1364 putushort(denp[0].deCDate, ndirent.de_CDate); 1365 putushort(denp[0].deCTime, ndirent.de_CTime); 1366 denp[0].deCHundredth = ndirent.de_CHun; 1367 putushort(denp[0].deADate, ndirent.de_ADate); 1368 putushort(denp[0].deMDate, ndirent.de_MDate); 1369 putushort(denp[0].deMTime, ndirent.de_MTime); 1370 pcl = pdep->de_StartCluster; 1371 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1372 pcl = 0; 1373 putushort(denp[1].deStartCluster, pcl); 1374 putushort(denp[1].deCDate, ndirent.de_CDate); 1375 putushort(denp[1].deCTime, ndirent.de_CTime); 1376 denp[1].deCHundredth = ndirent.de_CHun; 1377 putushort(denp[1].deADate, ndirent.de_ADate); 1378 putushort(denp[1].deMDate, ndirent.de_MDate); 1379 putushort(denp[1].deMTime, ndirent.de_MTime); 1380 if (FAT32(pmp)) { 1381 putushort(denp[0].deHighClust, newcluster >> 16); 1382 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1383 } 1384 1385 error = bwrite(bp); 1386 if (error) 1387 goto bad; 1388 1389 /* 1390 * Now build up a directory entry pointing to the newly allocated 1391 * cluster. This will be written to an empty slot in the parent 1392 * directory. 1393 */ 1394 #ifdef DIAGNOSTIC 1395 if ((cnp->cn_flags & HASBUF) == 0) 1396 panic("msdosfs_mkdir: no name"); 1397 #endif 1398 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1399 if (error) 1400 goto bad; 1401 1402 ndirent.de_Attributes = ATTR_DIRECTORY; 1403 ndirent.de_StartCluster = newcluster; 1404 ndirent.de_FileSize = 0; 1405 ndirent.de_dev = pdep->de_dev; 1406 ndirent.de_devvp = pdep->de_devvp; 1407 error = createde(&ndirent, pdep, &dep, cnp); 1408 if (error) 1409 goto bad; 1410 if ((cnp->cn_flags & SAVESTART) == 0) 1411 zfree(namei_zone, cnp->cn_pnbuf); 1412 *ap->a_vpp = DETOV(dep); 1413 return (0); 1414 1415 bad: 1416 clusterfree(pmp, newcluster, NULL); 1417 bad2: 1418 zfree(namei_zone, cnp->cn_pnbuf); 1419 return (error); 1420 } 1421 1422 static int 1423 msdosfs_rmdir(ap) 1424 struct vop_rmdir_args /* { 1425 struct vnode *a_dvp; 1426 struct vnode *a_vp; 1427 struct componentname *a_cnp; 1428 } */ *ap; 1429 { 1430 register struct vnode *vp = ap->a_vp; 1431 register struct vnode *dvp = ap->a_dvp; 1432 register struct componentname *cnp = ap->a_cnp; 1433 register struct denode *ip, *dp; 1434 struct proc *p = cnp->cn_proc; 1435 int error; 1436 1437 ip = VTODE(vp); 1438 dp = VTODE(dvp); 1439 1440 /* 1441 * Verify the directory is empty (and valid). 1442 * (Rmdir ".." won't be valid since 1443 * ".." will contain a reference to 1444 * the current directory and thus be 1445 * non-empty.) 1446 */ 1447 error = 0; 1448 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1449 error = ENOTEMPTY; 1450 goto out; 1451 } 1452 /* 1453 * Delete the entry from the directory. For dos filesystems this 1454 * gets rid of the directory entry on disk, the in memory copy 1455 * still exists but the de_refcnt is <= 0. This prevents it from 1456 * being found by deget(). When the vput() on dep is done we give 1457 * up access and eventually msdosfs_reclaim() will be called which 1458 * will remove it from the denode cache. 1459 */ 1460 error = removede(dp, ip); 1461 if (error) 1462 goto out; 1463 /* 1464 * This is where we decrement the link count in the parent 1465 * directory. Since dos filesystems don't do this we just purge 1466 * the name cache. 1467 */ 1468 cache_purge(dvp); 1469 VOP_UNLOCK(dvp, 0, p); 1470 /* 1471 * Truncate the directory that is being deleted. 1472 */ 1473 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, p); 1474 cache_purge(vp); 1475 1476 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p); 1477 out: 1478 return (error); 1479 } 1480 1481 /* 1482 * DOS filesystems don't know what symlinks are. 1483 */ 1484 static int 1485 msdosfs_symlink(ap) 1486 struct vop_symlink_args /* { 1487 struct vnode *a_dvp; 1488 struct vnode **a_vpp; 1489 struct componentname *a_cnp; 1490 struct vattr *a_vap; 1491 char *a_target; 1492 } */ *ap; 1493 { 1494 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 1495 /* VOP_ABORTOP(ap->a_dvp, ap->a_cnp); ??? */ 1496 return (EOPNOTSUPP); 1497 } 1498 1499 static int 1500 msdosfs_readdir(ap) 1501 struct vop_readdir_args /* { 1502 struct vnode *a_vp; 1503 struct uio *a_uio; 1504 struct ucred *a_cred; 1505 int *a_eofflag; 1506 int *a_ncookies; 1507 u_long **a_cookies; 1508 } */ *ap; 1509 { 1510 int error = 0; 1511 int diff; 1512 long n; 1513 int blsize; 1514 long on; 1515 u_long cn; 1516 u_long fileno; 1517 u_long dirsperblk; 1518 long bias = 0; 1519 daddr_t bn, lbn; 1520 struct buf *bp; 1521 struct denode *dep = VTODE(ap->a_vp); 1522 struct msdosfsmount *pmp = dep->de_pmp; 1523 struct direntry *dentp; 1524 struct dirent dirbuf; 1525 struct uio *uio = ap->a_uio; 1526 u_long *cookies = NULL; 1527 int ncookies = 0; 1528 off_t offset, off; 1529 int chksum = -1; 1530 1531 #ifdef MSDOSFS_DEBUG 1532 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1533 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1534 #endif 1535 1536 /* 1537 * msdosfs_readdir() won't operate properly on regular files since 1538 * it does i/o only with the the filesystem vnode, and hence can 1539 * retrieve the wrong block from the buffer cache for a plain file. 1540 * So, fail attempts to readdir() on a plain file. 1541 */ 1542 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1543 return (ENOTDIR); 1544 1545 /* 1546 * To be safe, initialize dirbuf 1547 */ 1548 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1549 1550 /* 1551 * If the user buffer is smaller than the size of one dos directory 1552 * entry or the file offset is not a multiple of the size of a 1553 * directory entry, then we fail the read. 1554 */ 1555 off = offset = uio->uio_offset; 1556 if (uio->uio_resid < sizeof(struct direntry) || 1557 (offset & (sizeof(struct direntry) - 1))) 1558 return (EINVAL); 1559 1560 if (ap->a_ncookies) { 1561 ncookies = uio->uio_resid / 16; 1562 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1563 M_WAITOK); 1564 *ap->a_cookies = cookies; 1565 *ap->a_ncookies = ncookies; 1566 } 1567 1568 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1569 1570 /* 1571 * If they are reading from the root directory then, we simulate 1572 * the . and .. entries since these don't exist in the root 1573 * directory. We also set the offset bias to make up for having to 1574 * simulate these entries. By this I mean that at file offset 64 we 1575 * read the first entry in the root directory that lives on disk. 1576 */ 1577 if (dep->de_StartCluster == MSDOSFSROOT 1578 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1579 #if 0 1580 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1581 offset); 1582 #endif 1583 bias = 2 * sizeof(struct direntry); 1584 if (offset < bias) { 1585 for (n = (int)offset / sizeof(struct direntry); 1586 n < 2; n++) { 1587 if (FAT32(pmp)) 1588 dirbuf.d_fileno = cntobn(pmp, 1589 pmp->pm_rootdirblk) 1590 * dirsperblk; 1591 else 1592 dirbuf.d_fileno = 1; 1593 dirbuf.d_type = DT_DIR; 1594 switch (n) { 1595 case 0: 1596 dirbuf.d_namlen = 1; 1597 strcpy(dirbuf.d_name, "."); 1598 break; 1599 case 1: 1600 dirbuf.d_namlen = 2; 1601 strcpy(dirbuf.d_name, ".."); 1602 break; 1603 } 1604 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1605 if (uio->uio_resid < dirbuf.d_reclen) 1606 goto out; 1607 error = uiomove((caddr_t) &dirbuf, 1608 dirbuf.d_reclen, uio); 1609 if (error) 1610 goto out; 1611 offset += sizeof(struct direntry); 1612 off = offset; 1613 if (cookies) { 1614 *cookies++ = offset; 1615 if (--ncookies <= 0) 1616 goto out; 1617 } 1618 } 1619 } 1620 } 1621 1622 off = offset; 1623 while (uio->uio_resid > 0) { 1624 lbn = de_cluster(pmp, offset - bias); 1625 on = (offset - bias) & pmp->pm_crbomask; 1626 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1627 diff = dep->de_FileSize - (offset - bias); 1628 if (diff <= 0) 1629 break; 1630 n = min(n, diff); 1631 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1632 if (error) 1633 break; 1634 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1635 if (error) { 1636 brelse(bp); 1637 return (error); 1638 } 1639 n = min(n, blsize - bp->b_resid); 1640 1641 /* 1642 * Convert from dos directory entries to fs-independent 1643 * directory entries. 1644 */ 1645 for (dentp = (struct direntry *)(bp->b_data + on); 1646 (char *)dentp < bp->b_data + on + n; 1647 dentp++, offset += sizeof(struct direntry)) { 1648 #if 0 1649 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1650 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1651 #endif 1652 /* 1653 * If this is an unused entry, we can stop. 1654 */ 1655 if (dentp->deName[0] == SLOT_EMPTY) { 1656 brelse(bp); 1657 goto out; 1658 } 1659 /* 1660 * Skip deleted entries. 1661 */ 1662 if (dentp->deName[0] == SLOT_DELETED) { 1663 chksum = -1; 1664 continue; 1665 } 1666 1667 /* 1668 * Handle Win95 long directory entries 1669 */ 1670 if (dentp->deAttributes == ATTR_WIN95) { 1671 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1672 continue; 1673 chksum = win2unixfn((struct winentry *)dentp, 1674 &dirbuf, chksum, 1675 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1676 pmp->pm_u2w); 1677 continue; 1678 } 1679 1680 /* 1681 * Skip volume labels 1682 */ 1683 if (dentp->deAttributes & ATTR_VOLUME) { 1684 chksum = -1; 1685 continue; 1686 } 1687 /* 1688 * This computation of d_fileno must match 1689 * the computation of va_fileid in 1690 * msdosfs_getattr. 1691 */ 1692 if (dentp->deAttributes & ATTR_DIRECTORY) { 1693 fileno = getushort(dentp->deStartCluster); 1694 if (FAT32(pmp)) 1695 fileno |= getushort(dentp->deHighClust) << 16; 1696 /* if this is the root directory */ 1697 if (fileno == MSDOSFSROOT) 1698 if (FAT32(pmp)) 1699 fileno = cntobn(pmp, 1700 pmp->pm_rootdirblk) 1701 * dirsperblk; 1702 else 1703 fileno = 1; 1704 else 1705 fileno = cntobn(pmp, fileno) * dirsperblk; 1706 dirbuf.d_fileno = fileno; 1707 dirbuf.d_type = DT_DIR; 1708 } else { 1709 dirbuf.d_fileno = offset / sizeof(struct direntry); 1710 dirbuf.d_type = DT_REG; 1711 } 1712 if (chksum != winChksum(dentp->deName)) 1713 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1714 (u_char *)dirbuf.d_name, 1715 pmp->pm_flags & MSDOSFSMNT_SHORTNAME, 1716 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1717 pmp->pm_d2u, 1718 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1719 pmp->pm_ul); 1720 else 1721 dirbuf.d_name[dirbuf.d_namlen] = 0; 1722 chksum = -1; 1723 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1724 if (uio->uio_resid < dirbuf.d_reclen) { 1725 brelse(bp); 1726 goto out; 1727 } 1728 error = uiomove((caddr_t) &dirbuf, 1729 dirbuf.d_reclen, uio); 1730 if (error) { 1731 brelse(bp); 1732 goto out; 1733 } 1734 if (cookies) { 1735 *cookies++ = offset + sizeof(struct direntry); 1736 if (--ncookies <= 0) { 1737 brelse(bp); 1738 goto out; 1739 } 1740 } 1741 off = offset + sizeof(struct direntry); 1742 } 1743 brelse(bp); 1744 } 1745 out: 1746 /* Subtract unused cookies */ 1747 if (ap->a_ncookies) 1748 *ap->a_ncookies -= ncookies; 1749 1750 uio->uio_offset = off; 1751 1752 /* 1753 * Set the eofflag (NFS uses it) 1754 */ 1755 if (ap->a_eofflag) 1756 if (dep->de_FileSize - (offset - bias) <= 0) 1757 *ap->a_eofflag = 1; 1758 else 1759 *ap->a_eofflag = 0; 1760 1761 return (error); 1762 } 1763 1764 static int 1765 msdosfs_abortop(ap) 1766 struct vop_abortop_args /* { 1767 struct vnode *a_dvp; 1768 struct componentname *a_cnp; 1769 } */ *ap; 1770 { 1771 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 1772 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 1773 return (0); 1774 } 1775 1776 /* 1777 * vp - address of vnode file the file 1778 * bn - which cluster we are interested in mapping to a filesystem block number. 1779 * vpp - returns the vnode for the block special file holding the filesystem 1780 * containing the file of interest 1781 * bnp - address of where to return the filesystem relative block number 1782 */ 1783 static int 1784 msdosfs_bmap(ap) 1785 struct vop_bmap_args /* { 1786 struct vnode *a_vp; 1787 daddr_t a_bn; 1788 struct vnode **a_vpp; 1789 daddr_t *a_bnp; 1790 int *a_runp; 1791 int *a_runb; 1792 } */ *ap; 1793 { 1794 struct denode *dep = VTODE(ap->a_vp); 1795 struct msdosfsmount *pmp = dep->de_pmp; 1796 1797 if (ap->a_vpp != NULL) 1798 *ap->a_vpp = dep->de_devvp; 1799 if (ap->a_bnp == NULL) 1800 return (0); 1801 if (ap->a_runp) { 1802 /* 1803 * Sequential clusters should be counted here. 1804 */ 1805 *ap->a_runp = 0; 1806 } 1807 if (ap->a_runb) { 1808 *ap->a_runb = 0; 1809 } 1810 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0)); 1811 } 1812 1813 static int 1814 msdosfs_strategy(ap) 1815 struct vop_strategy_args /* { 1816 struct buf *a_bp; 1817 } */ *ap; 1818 { 1819 struct buf *bp = ap->a_bp; 1820 struct denode *dep = VTODE(bp->b_vp); 1821 struct vnode *vp; 1822 int error = 0; 1823 1824 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1825 panic("msdosfs_strategy: spec"); 1826 /* 1827 * If we don't already know the filesystem relative block number 1828 * then get it using pcbmap(). If pcbmap() returns the block 1829 * number as -1 then we've got a hole in the file. DOS filesystems 1830 * don't allow files with holes, so we shouldn't ever see this. 1831 */ 1832 if (bp->b_blkno == bp->b_lblkno) { 1833 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0); 1834 if (error) { 1835 bp->b_error = error; 1836 bp->b_flags |= B_ERROR; 1837 biodone(bp); 1838 return (error); 1839 } 1840 if ((long)bp->b_blkno == -1) 1841 vfs_bio_clrbuf(bp); 1842 } 1843 if (bp->b_blkno == -1) { 1844 biodone(bp); 1845 return (0); 1846 } 1847 /* 1848 * Read/write the block from/to the disk that contains the desired 1849 * file block. 1850 */ 1851 vp = dep->de_devvp; 1852 bp->b_dev = vp->v_rdev; 1853 VOCALL(vp->v_op, VOFFSET(vop_strategy), ap); 1854 return (0); 1855 } 1856 1857 static int 1858 msdosfs_print(ap) 1859 struct vop_print_args /* { 1860 struct vnode *vp; 1861 } */ *ap; 1862 { 1863 struct denode *dep = VTODE(ap->a_vp); 1864 1865 printf( 1866 "tag VT_MSDOSFS, startcluster %d, dircluster %ld, diroffset %ld ", 1867 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1868 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1869 lockmgr_printinfo(&dep->de_lock); 1870 printf("\n"); 1871 return (0); 1872 } 1873 1874 static int 1875 msdosfs_pathconf(ap) 1876 struct vop_pathconf_args /* { 1877 struct vnode *a_vp; 1878 int a_name; 1879 int *a_retval; 1880 } */ *ap; 1881 { 1882 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1883 1884 switch (ap->a_name) { 1885 case _PC_LINK_MAX: 1886 *ap->a_retval = 1; 1887 return (0); 1888 case _PC_NAME_MAX: 1889 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1890 return (0); 1891 case _PC_PATH_MAX: 1892 *ap->a_retval = PATH_MAX; 1893 return (0); 1894 case _PC_CHOWN_RESTRICTED: 1895 *ap->a_retval = 1; 1896 return (0); 1897 case _PC_NO_TRUNC: 1898 *ap->a_retval = 0; 1899 return (0); 1900 default: 1901 return (EINVAL); 1902 } 1903 /* NOTREACHED */ 1904 } 1905 1906 /* 1907 * get page routine 1908 * 1909 * XXX By default, wimp out... note that a_offset is ignored (and always 1910 * XXX has been). 1911 */ 1912 int 1913 msdosfs_getpages(ap) 1914 struct vop_getpages_args *ap; 1915 { 1916 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1917 ap->a_reqpage); 1918 } 1919 1920 /* 1921 * put page routine 1922 * 1923 * XXX By default, wimp out... note that a_offset is ignored (and always 1924 * XXX has been). 1925 */ 1926 int 1927 msdosfs_putpages(ap) 1928 struct vop_putpages_args *ap; 1929 { 1930 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1931 ap->a_sync, ap->a_rtvals); 1932 } 1933 1934 /* Global vfs data structures for msdosfs */ 1935 vop_t **msdosfs_vnodeop_p; 1936 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1937 { &vop_default_desc, (vop_t *) vop_defaultop }, 1938 { &vop_abortop_desc, (vop_t *) msdosfs_abortop }, 1939 { &vop_access_desc, (vop_t *) msdosfs_access }, 1940 { &vop_bmap_desc, (vop_t *) msdosfs_bmap }, 1941 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup }, 1942 { &vop_close_desc, (vop_t *) msdosfs_close }, 1943 { &vop_create_desc, (vop_t *) msdosfs_create }, 1944 { &vop_fsync_desc, (vop_t *) msdosfs_fsync }, 1945 { &vop_getattr_desc, (vop_t *) msdosfs_getattr }, 1946 { &vop_inactive_desc, (vop_t *) msdosfs_inactive }, 1947 { &vop_islocked_desc, (vop_t *) vop_stdislocked }, 1948 { &vop_link_desc, (vop_t *) msdosfs_link }, 1949 { &vop_lock_desc, (vop_t *) vop_stdlock }, 1950 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup }, 1951 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir }, 1952 { &vop_mknod_desc, (vop_t *) msdosfs_mknod }, 1953 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf }, 1954 { &vop_print_desc, (vop_t *) msdosfs_print }, 1955 { &vop_read_desc, (vop_t *) msdosfs_read }, 1956 { &vop_readdir_desc, (vop_t *) msdosfs_readdir }, 1957 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim }, 1958 { &vop_remove_desc, (vop_t *) msdosfs_remove }, 1959 { &vop_rename_desc, (vop_t *) msdosfs_rename }, 1960 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir }, 1961 { &vop_setattr_desc, (vop_t *) msdosfs_setattr }, 1962 { &vop_strategy_desc, (vop_t *) msdosfs_strategy }, 1963 { &vop_symlink_desc, (vop_t *) msdosfs_symlink }, 1964 { &vop_unlock_desc, (vop_t *) vop_stdunlock }, 1965 { &vop_write_desc, (vop_t *) msdosfs_write }, 1966 { &vop_getpages_desc, (vop_t *) msdosfs_getpages }, 1967 { &vop_putpages_desc, (vop_t *) msdosfs_putpages }, 1968 { NULL, NULL } 1969 }; 1970 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1971 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1972 1973 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 1974