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sys/fs/msdosfs/msdosfs_vnops.c
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1 /* $FreeBSD: releng/8.4/sys/fs/msdosfs/msdosfs_vnops.c 246548 2013-02-08 11:15:57Z kib $ */ 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/bio.h> 54 #include <sys/buf.h> 55 #include <sys/clock.h> 56 #include <sys/dirent.h> 57 #include <sys/lock.h> 58 #include <sys/lockf.h> 59 #include <sys/malloc.h> 60 #include <sys/mount.h> 61 #include <sys/mutex.h> 62 #include <sys/namei.h> 63 #include <sys/priv.h> 64 #include <sys/stat.h> 65 #include <sys/unistd.h> 66 #include <sys/vnode.h> 67 68 #include <vm/vm.h> 69 #include <vm/vm_extern.h> 70 71 #include <fs/msdosfs/bpb.h> 72 #include <fs/msdosfs/direntry.h> 73 #include <fs/msdosfs/denode.h> 74 #include <fs/msdosfs/fat.h> 75 #include <fs/msdosfs/msdosfsmount.h> 76 77 #define DOS_FILESIZE_MAX 0xffffffff 78 79 /* 80 * Prototypes for MSDOSFS vnode operations 81 */ 82 static vop_create_t msdosfs_create; 83 static vop_mknod_t msdosfs_mknod; 84 static vop_open_t msdosfs_open; 85 static vop_close_t msdosfs_close; 86 static vop_access_t msdosfs_access; 87 static vop_getattr_t msdosfs_getattr; 88 static vop_setattr_t msdosfs_setattr; 89 static vop_read_t msdosfs_read; 90 static vop_write_t msdosfs_write; 91 static vop_fsync_t msdosfs_fsync; 92 static vop_remove_t msdosfs_remove; 93 static vop_link_t msdosfs_link; 94 static vop_rename_t msdosfs_rename; 95 static vop_mkdir_t msdosfs_mkdir; 96 static vop_rmdir_t msdosfs_rmdir; 97 static vop_symlink_t msdosfs_symlink; 98 static vop_readdir_t msdosfs_readdir; 99 static vop_bmap_t msdosfs_bmap; 100 static vop_strategy_t msdosfs_strategy; 101 static vop_print_t msdosfs_print; 102 static vop_pathconf_t msdosfs_pathconf; 103 static vop_vptofh_t msdosfs_vptofh; 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_LowerCase = 0; 178 ndirent.de_StartCluster = 0; 179 ndirent.de_FileSize = 0; 180 ndirent.de_pmp = pdep->de_pmp; 181 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 182 getnanotime(&ts); 183 DETIMES(&ndirent, &ts, &ts, &ts); 184 error = createde(&ndirent, pdep, &dep, cnp); 185 if (error) 186 goto bad; 187 *ap->a_vpp = DETOV(dep); 188 return (0); 189 190 bad: 191 return (error); 192 } 193 194 static int 195 msdosfs_mknod(ap) 196 struct vop_mknod_args /* { 197 struct vnode *a_dvp; 198 struct vnode **a_vpp; 199 struct componentname *a_cnp; 200 struct vattr *a_vap; 201 } */ *ap; 202 { 203 204 return (EINVAL); 205 } 206 207 static int 208 msdosfs_open(ap) 209 struct vop_open_args /* { 210 struct vnode *a_vp; 211 int a_mode; 212 struct ucred *a_cred; 213 struct thread *a_td; 214 struct file *a_fp; 215 } */ *ap; 216 { 217 struct denode *dep = VTODE(ap->a_vp); 218 vnode_create_vobject(ap->a_vp, dep->de_FileSize, ap->a_td); 219 return 0; 220 } 221 222 static int 223 msdosfs_close(ap) 224 struct vop_close_args /* { 225 struct vnode *a_vp; 226 int a_fflag; 227 struct ucred *a_cred; 228 struct thread *a_td; 229 } */ *ap; 230 { 231 struct vnode *vp = ap->a_vp; 232 struct denode *dep = VTODE(vp); 233 struct timespec ts; 234 235 VI_LOCK(vp); 236 if (vp->v_usecount > 1) { 237 getnanotime(&ts); 238 DETIMES(dep, &ts, &ts, &ts); 239 } 240 VI_UNLOCK(vp); 241 return 0; 242 } 243 244 static int 245 msdosfs_access(ap) 246 struct vop_access_args /* { 247 struct vnode *a_vp; 248 accmode_t a_accmode; 249 struct ucred *a_cred; 250 struct thread *a_td; 251 } */ *ap; 252 { 253 struct vnode *vp = ap->a_vp; 254 struct denode *dep = VTODE(ap->a_vp); 255 struct msdosfsmount *pmp = dep->de_pmp; 256 mode_t file_mode; 257 accmode_t accmode = ap->a_accmode; 258 259 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 260 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 261 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 262 263 /* 264 * Disallow writing to directories and regular files if the 265 * filesystem is read-only. 266 */ 267 if (accmode & VWRITE) { 268 switch (vp->v_type) { 269 case VDIR: 270 case VREG: 271 if (vp->v_mount->mnt_flag & MNT_RDONLY) 272 return (EROFS); 273 break; 274 default: 275 break; 276 } 277 } 278 279 return (vaccess(vp->v_type, file_mode, pmp->pm_uid, pmp->pm_gid, 280 ap->a_accmode, ap->a_cred, NULL)); 281 } 282 283 static int 284 msdosfs_getattr(ap) 285 struct vop_getattr_args /* { 286 struct vnode *a_vp; 287 struct vattr *a_vap; 288 struct ucred *a_cred; 289 } */ *ap; 290 { 291 struct denode *dep = VTODE(ap->a_vp); 292 struct msdosfsmount *pmp = dep->de_pmp; 293 struct vattr *vap = ap->a_vap; 294 mode_t mode; 295 struct timespec ts; 296 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 297 uint64_t fileid; 298 299 getnanotime(&ts); 300 DETIMES(dep, &ts, &ts, &ts); 301 vap->va_fsid = dev2udev(pmp->pm_dev); 302 /* 303 * The following computation of the fileid must be the same as that 304 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 305 * doesn't work. 306 */ 307 if (dep->de_Attributes & ATTR_DIRECTORY) { 308 fileid = (uint64_t)cntobn(pmp, dep->de_StartCluster) * 309 dirsperblk; 310 if (dep->de_StartCluster == MSDOSFSROOT) 311 fileid = 1; 312 } else { 313 fileid = (uint64_t)cntobn(pmp, dep->de_dirclust) * 314 dirsperblk; 315 if (dep->de_dirclust == MSDOSFSROOT) 316 fileid = (uint64_t)roottobn(pmp, 0) * dirsperblk; 317 fileid += (uoff_t)dep->de_diroffset / sizeof(struct direntry); 318 } 319 320 if (pmp->pm_flags & MSDOSFS_LARGEFS) 321 vap->va_fileid = msdosfs_fileno_map(pmp->pm_mountp, fileid); 322 else 323 vap->va_fileid = (long)fileid; 324 325 if ((dep->de_Attributes & ATTR_READONLY) == 0) 326 mode = S_IRWXU|S_IRWXG|S_IRWXO; 327 else 328 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 329 vap->va_mode = mode & 330 (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 331 vap->va_uid = pmp->pm_uid; 332 vap->va_gid = pmp->pm_gid; 333 vap->va_nlink = 1; 334 vap->va_rdev = NODEV; 335 vap->va_size = dep->de_FileSize; 336 fattime2timespec(dep->de_MDate, dep->de_MTime, 0, 0, &vap->va_mtime); 337 vap->va_ctime = vap->va_mtime; 338 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 339 fattime2timespec(dep->de_ADate, 0, 0, 0, &vap->va_atime); 340 fattime2timespec(dep->de_CDate, dep->de_CTime, dep->de_CHun, 341 0, &vap->va_birthtime); 342 } else { 343 vap->va_atime = vap->va_mtime; 344 vap->va_birthtime.tv_sec = -1; 345 vap->va_birthtime.tv_nsec = 0; 346 } 347 vap->va_flags = 0; 348 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 349 vap->va_flags |= SF_ARCHIVED; 350 vap->va_gen = 0; 351 vap->va_blocksize = pmp->pm_bpcluster; 352 vap->va_bytes = 353 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 354 vap->va_type = ap->a_vp->v_type; 355 vap->va_filerev = dep->de_modrev; 356 return (0); 357 } 358 359 static int 360 msdosfs_setattr(ap) 361 struct vop_setattr_args /* { 362 struct vnode *a_vp; 363 struct vattr *a_vap; 364 struct ucred *a_cred; 365 } */ *ap; 366 { 367 struct vnode *vp = ap->a_vp; 368 struct denode *dep = VTODE(ap->a_vp); 369 struct msdosfsmount *pmp = dep->de_pmp; 370 struct vattr *vap = ap->a_vap; 371 struct ucred *cred = ap->a_cred; 372 struct thread *td = curthread; 373 int error = 0; 374 375 #ifdef MSDOSFS_DEBUG 376 printf("msdosfs_setattr(): vp %p, vap %p, cred %p\n", 377 ap->a_vp, vap, cred); 378 #endif 379 380 /* 381 * Check for unsettable attributes. 382 */ 383 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 384 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 385 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 386 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 387 #ifdef MSDOSFS_DEBUG 388 printf("msdosfs_setattr(): returning EINVAL\n"); 389 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 390 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 391 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 392 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 393 printf(" va_uid %x, va_gid %x\n", 394 vap->va_uid, vap->va_gid); 395 #endif 396 return (EINVAL); 397 } 398 if (vap->va_flags != VNOVAL) { 399 if (vp->v_mount->mnt_flag & MNT_RDONLY) 400 return (EROFS); 401 if (cred->cr_uid != pmp->pm_uid) { 402 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0); 403 if (error) 404 return (error); 405 } 406 /* 407 * We are very inconsistent about handling unsupported 408 * attributes. We ignored the access time and the 409 * read and execute bits. We were strict for the other 410 * attributes. 411 * 412 * Here we are strict, stricter than ufs in not allowing 413 * users to attempt to set SF_SETTABLE bits or anyone to 414 * set unsupported bits. However, we ignore attempts to 415 * set ATTR_ARCHIVE for directories `cp -pr' from a more 416 * sensible filesystem attempts it a lot. 417 */ 418 if (vap->va_flags & SF_SETTABLE) { 419 error = priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0); 420 if (error) 421 return (error); 422 } 423 if (vap->va_flags & ~SF_ARCHIVED) 424 return EOPNOTSUPP; 425 if (vap->va_flags & SF_ARCHIVED) 426 dep->de_Attributes &= ~ATTR_ARCHIVE; 427 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 428 dep->de_Attributes |= ATTR_ARCHIVE; 429 dep->de_flag |= DE_MODIFIED; 430 } 431 432 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 433 uid_t uid; 434 gid_t gid; 435 436 if (vp->v_mount->mnt_flag & MNT_RDONLY) 437 return (EROFS); 438 uid = vap->va_uid; 439 if (uid == (uid_t)VNOVAL) 440 uid = pmp->pm_uid; 441 gid = vap->va_gid; 442 if (gid == (gid_t)VNOVAL) 443 gid = pmp->pm_gid; 444 if (cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 445 (gid != pmp->pm_gid && !groupmember(gid, cred))) { 446 error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0); 447 if (error) 448 return (error); 449 } 450 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 451 return EINVAL; 452 } 453 454 if (vap->va_size != VNOVAL) { 455 switch (vp->v_type) { 456 case VDIR: 457 return (EISDIR); 458 case VREG: 459 /* 460 * Truncation is only supported for regular files, 461 * Disallow it if the filesystem is read-only. 462 */ 463 if (vp->v_mount->mnt_flag & MNT_RDONLY) 464 return (EROFS); 465 break; 466 default: 467 /* 468 * According to POSIX, the result is unspecified 469 * for file types other than regular files, 470 * directories and shared memory objects. We 471 * don't support any file types except regular 472 * files and directories in this file system, so 473 * this (default) case is unreachable and can do 474 * anything. Keep falling through to detrunc() 475 * for now. 476 */ 477 break; 478 } 479 error = detrunc(dep, vap->va_size, 0, cred, td); 480 if (error) 481 return error; 482 } 483 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 484 if (vp->v_mount->mnt_flag & MNT_RDONLY) 485 return (EROFS); 486 if (vap->va_vaflags & VA_UTIMES_NULL) { 487 error = VOP_ACCESS(vp, VADMIN, cred, td); 488 if (error) 489 error = VOP_ACCESS(vp, VWRITE, cred, td); 490 } else 491 error = VOP_ACCESS(vp, VADMIN, cred, td); 492 if (vp->v_type != VDIR) { 493 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 494 vap->va_atime.tv_sec != VNOVAL) { 495 dep->de_flag &= ~DE_ACCESS; 496 timespec2fattime(&vap->va_atime, 0, 497 &dep->de_ADate, NULL, NULL); 498 } 499 if (vap->va_mtime.tv_sec != VNOVAL) { 500 dep->de_flag &= ~DE_UPDATE; 501 timespec2fattime(&vap->va_mtime, 0, 502 &dep->de_MDate, &dep->de_MTime, NULL); 503 } 504 dep->de_Attributes |= ATTR_ARCHIVE; 505 dep->de_flag |= DE_MODIFIED; 506 } 507 } 508 /* 509 * DOS files only have the ability to have their writability 510 * attribute set, so we use the owner write bit to set the readonly 511 * attribute. 512 */ 513 if (vap->va_mode != (mode_t)VNOVAL) { 514 if (vp->v_mount->mnt_flag & MNT_RDONLY) 515 return (EROFS); 516 if (cred->cr_uid != pmp->pm_uid) { 517 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0); 518 if (error) 519 return (error); 520 } 521 if (vp->v_type != VDIR) { 522 /* We ignore the read and execute bits. */ 523 if (vap->va_mode & VWRITE) 524 dep->de_Attributes &= ~ATTR_READONLY; 525 else 526 dep->de_Attributes |= ATTR_READONLY; 527 dep->de_Attributes |= ATTR_ARCHIVE; 528 dep->de_flag |= DE_MODIFIED; 529 } 530 } 531 return (deupdat(dep, 0)); 532 } 533 534 static int 535 msdosfs_read(ap) 536 struct vop_read_args /* { 537 struct vnode *a_vp; 538 struct uio *a_uio; 539 int a_ioflag; 540 struct ucred *a_cred; 541 } */ *ap; 542 { 543 int error = 0; 544 int blsize; 545 int isadir; 546 int orig_resid; 547 u_int n; 548 u_long diff; 549 u_long on; 550 daddr_t lbn; 551 daddr_t rablock; 552 int rasize; 553 int seqcount; 554 struct buf *bp; 555 struct vnode *vp = ap->a_vp; 556 struct denode *dep = VTODE(vp); 557 struct msdosfsmount *pmp = dep->de_pmp; 558 struct uio *uio = ap->a_uio; 559 560 /* 561 * If they didn't ask for any data, then we are done. 562 */ 563 orig_resid = uio->uio_resid; 564 if (orig_resid == 0) 565 return (0); 566 567 /* 568 * The caller is supposed to ensure that 569 * uio->uio_offset >= 0 and uio->uio_resid >= 0. 570 * We don't need to check for large offsets as in ffs because 571 * dep->de_FileSize <= DOS_FILESIZE_MAX < OFF_MAX, so large 572 * offsets cannot cause overflow even in theory. 573 */ 574 575 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 576 577 isadir = dep->de_Attributes & ATTR_DIRECTORY; 578 do { 579 if (uio->uio_offset >= dep->de_FileSize) 580 break; 581 lbn = de_cluster(pmp, uio->uio_offset); 582 rablock = lbn + 1; 583 blsize = pmp->pm_bpcluster; 584 on = uio->uio_offset & pmp->pm_crbomask; 585 /* 586 * If we are operating on a directory file then be sure to 587 * do i/o with the vnode for the filesystem instead of the 588 * vnode for the directory. 589 */ 590 if (isadir) { 591 /* convert cluster # to block # */ 592 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 593 if (error == E2BIG) { 594 error = EINVAL; 595 break; 596 } else if (error) 597 break; 598 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 599 } else if (de_cn2off(pmp, rablock) >= dep->de_FileSize) { 600 error = bread(vp, lbn, blsize, NOCRED, &bp); 601 } else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 602 error = cluster_read(vp, dep->de_FileSize, lbn, blsize, 603 NOCRED, on + uio->uio_resid, seqcount, &bp); 604 } else if (seqcount > 1) { 605 rasize = blsize; 606 error = breadn(vp, lbn, 607 blsize, &rablock, &rasize, 1, NOCRED, &bp); 608 } else { 609 error = bread(vp, lbn, blsize, NOCRED, &bp); 610 } 611 if (error) { 612 brelse(bp); 613 break; 614 } 615 diff = pmp->pm_bpcluster - on; 616 n = diff > uio->uio_resid ? uio->uio_resid : diff; 617 diff = dep->de_FileSize - uio->uio_offset; 618 if (diff < n) 619 n = diff; 620 diff = blsize - bp->b_resid; 621 if (diff < n) 622 n = diff; 623 error = uiomove(bp->b_data + on, (int) n, uio); 624 brelse(bp); 625 } while (error == 0 && uio->uio_resid > 0 && n != 0); 626 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 627 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 628 dep->de_flag |= DE_ACCESS; 629 return (error); 630 } 631 632 /* 633 * Write data to a file or directory. 634 */ 635 static int 636 msdosfs_write(ap) 637 struct vop_write_args /* { 638 struct vnode *a_vp; 639 struct uio *a_uio; 640 int a_ioflag; 641 struct ucred *a_cred; 642 } */ *ap; 643 { 644 int n; 645 int croffset; 646 int resid; 647 u_long osize; 648 int error = 0; 649 u_long count; 650 int seqcount; 651 daddr_t bn, lastcn; 652 struct buf *bp; 653 int ioflag = ap->a_ioflag; 654 struct uio *uio = ap->a_uio; 655 struct thread *td = uio->uio_td; 656 struct vnode *vp = ap->a_vp; 657 struct vnode *thisvp; 658 struct denode *dep = VTODE(vp); 659 struct msdosfsmount *pmp = dep->de_pmp; 660 struct ucred *cred = ap->a_cred; 661 662 #ifdef MSDOSFS_DEBUG 663 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 664 vp, uio, ioflag, cred); 665 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 666 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 667 #endif 668 669 switch (vp->v_type) { 670 case VREG: 671 if (ioflag & IO_APPEND) 672 uio->uio_offset = dep->de_FileSize; 673 thisvp = vp; 674 break; 675 case VDIR: 676 return EISDIR; 677 default: 678 panic("msdosfs_write(): bad file type"); 679 } 680 681 /* 682 * This is needed (unlike in ffs_write()) because we extend the 683 * file outside of the loop but we don't want to extend the file 684 * for writes of 0 bytes. 685 */ 686 if (uio->uio_resid == 0) 687 return (0); 688 689 /* 690 * The caller is supposed to ensure that 691 * uio->uio_offset >= 0 and uio->uio_resid >= 0. 692 */ 693 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 694 return (EFBIG); 695 696 /* 697 * If they've exceeded their filesize limit, tell them about it. 698 */ 699 if (vn_rlimit_fsize(vp, uio, td)) 700 return (EFBIG); 701 702 /* 703 * If the offset we are starting the write at is beyond the end of 704 * the file, then they've done a seek. Unix filesystems allow 705 * files with holes in them, DOS doesn't so we must fill the hole 706 * with zeroed blocks. 707 */ 708 if (uio->uio_offset > dep->de_FileSize) { 709 error = deextend(dep, uio->uio_offset, cred); 710 if (error) 711 return (error); 712 } 713 714 /* 715 * Remember some values in case the write fails. 716 */ 717 resid = uio->uio_resid; 718 osize = dep->de_FileSize; 719 720 /* 721 * If we write beyond the end of the file, extend it to its ultimate 722 * size ahead of the time to hopefully get a contiguous area. 723 */ 724 if (uio->uio_offset + resid > osize) { 725 count = de_clcount(pmp, uio->uio_offset + resid) - 726 de_clcount(pmp, osize); 727 error = extendfile(dep, count, NULL, NULL, 0); 728 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 729 goto errexit; 730 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 731 } else 732 lastcn = de_clcount(pmp, osize) - 1; 733 734 seqcount = ioflag >> IO_SEQSHIFT; 735 do { 736 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 737 error = ENOSPC; 738 break; 739 } 740 741 croffset = uio->uio_offset & pmp->pm_crbomask; 742 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 743 if (uio->uio_offset + n > dep->de_FileSize) { 744 dep->de_FileSize = uio->uio_offset + n; 745 /* The object size needs to be set before buffer is allocated */ 746 vnode_pager_setsize(vp, dep->de_FileSize); 747 } 748 749 bn = de_cluster(pmp, uio->uio_offset); 750 if ((uio->uio_offset & pmp->pm_crbomask) == 0 751 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 752 > de_cluster(pmp, uio->uio_offset) 753 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 754 /* 755 * If either the whole cluster gets written, 756 * or we write the cluster from its start beyond EOF, 757 * then no need to read data from disk. 758 */ 759 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0, 0); 760 vfs_bio_clrbuf(bp); 761 /* 762 * Do the bmap now, since pcbmap needs buffers 763 * for the fat table. (see msdosfs_strategy) 764 */ 765 if (bp->b_blkno == bp->b_lblkno) { 766 error = pcbmap(dep, bp->b_lblkno, &bn, 0, 0); 767 if (error) 768 bp->b_blkno = -1; 769 else 770 bp->b_blkno = bn; 771 } 772 if (bp->b_blkno == -1) { 773 brelse(bp); 774 if (!error) 775 error = EIO; /* XXX */ 776 break; 777 } 778 } else { 779 /* 780 * The block we need to write into exists, so read it in. 781 */ 782 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 783 if (error) { 784 brelse(bp); 785 break; 786 } 787 } 788 789 /* 790 * Should these vnode_pager_* functions be done on dir 791 * files? 792 */ 793 794 /* 795 * Copy the data from user space into the buf header. 796 */ 797 error = uiomove(bp->b_data + croffset, n, uio); 798 if (error) { 799 brelse(bp); 800 break; 801 } 802 803 /* Prepare for clustered writes in some else clauses. */ 804 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) 805 bp->b_flags |= B_CLUSTEROK; 806 807 /* 808 * If IO_SYNC, then each buffer is written synchronously. 809 * Otherwise, if we have a severe page deficiency then 810 * write the buffer asynchronously. Otherwise, if on a 811 * cluster boundary then write the buffer asynchronously, 812 * combining it with contiguous clusters if permitted and 813 * possible, since we don't expect more writes into this 814 * buffer soon. Otherwise, do a delayed write because we 815 * expect more writes into this buffer soon. 816 */ 817 if (ioflag & IO_SYNC) 818 (void)bwrite(bp); 819 else if (vm_page_count_severe() || buf_dirty_count_severe()) 820 bawrite(bp); 821 else if (n + croffset == pmp->pm_bpcluster) { 822 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) 823 cluster_write(vp, bp, dep->de_FileSize, 824 seqcount); 825 else 826 bawrite(bp); 827 } else 828 bdwrite(bp); 829 dep->de_flag |= DE_UPDATE; 830 } while (error == 0 && uio->uio_resid > 0); 831 832 /* 833 * If the write failed and they want us to, truncate the file back 834 * to the size it was before the write was attempted. 835 */ 836 errexit: 837 if (error) { 838 if (ioflag & IO_UNIT) { 839 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 840 uio->uio_offset -= resid - uio->uio_resid; 841 uio->uio_resid = resid; 842 } else { 843 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 844 if (uio->uio_resid != resid) 845 error = 0; 846 } 847 } else if (ioflag & IO_SYNC) 848 error = deupdat(dep, 1); 849 return (error); 850 } 851 852 /* 853 * Flush the blocks of a file to disk. 854 * 855 * This function is worthless for vnodes that represent directories. Maybe we 856 * could just do a sync if they try an fsync on a directory file. 857 */ 858 static int 859 msdosfs_fsync(ap) 860 struct vop_fsync_args /* { 861 struct vnode *a_vp; 862 struct ucred *a_cred; 863 int a_waitfor; 864 struct thread *a_td; 865 } */ *ap; 866 { 867 868 vop_stdfsync(ap); 869 return (deupdat(VTODE(ap->a_vp), ap->a_waitfor == MNT_WAIT)); 870 } 871 872 static int 873 msdosfs_remove(ap) 874 struct vop_remove_args /* { 875 struct vnode *a_dvp; 876 struct vnode *a_vp; 877 struct componentname *a_cnp; 878 } */ *ap; 879 { 880 struct denode *dep = VTODE(ap->a_vp); 881 struct denode *ddep = VTODE(ap->a_dvp); 882 int error; 883 884 if (ap->a_vp->v_type == VDIR) 885 error = EPERM; 886 else 887 error = removede(ddep, dep); 888 #ifdef MSDOSFS_DEBUG 889 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 890 #endif 891 return (error); 892 } 893 894 /* 895 * DOS filesystems don't know what links are. 896 */ 897 static int 898 msdosfs_link(ap) 899 struct vop_link_args /* { 900 struct vnode *a_tdvp; 901 struct vnode *a_vp; 902 struct componentname *a_cnp; 903 } */ *ap; 904 { 905 return (EOPNOTSUPP); 906 } 907 908 /* 909 * Renames on files require moving the denode to a new hash queue since the 910 * denode's location is used to compute which hash queue to put the file 911 * in. Unless it is a rename in place. For example "mv a b". 912 * 913 * What follows is the basic algorithm: 914 * 915 * if (file move) { 916 * if (dest file exists) { 917 * remove dest file 918 * } 919 * if (dest and src in same directory) { 920 * rewrite name in existing directory slot 921 * } else { 922 * write new entry in dest directory 923 * update offset and dirclust in denode 924 * move denode to new hash chain 925 * clear old directory entry 926 * } 927 * } else { 928 * directory move 929 * if (dest directory exists) { 930 * if (dest is not empty) { 931 * return ENOTEMPTY 932 * } 933 * remove dest directory 934 * } 935 * if (dest and src in same directory) { 936 * rewrite name in existing entry 937 * } else { 938 * be sure dest is not a child of src directory 939 * write entry in dest directory 940 * update "." and ".." in moved directory 941 * clear old directory entry for moved directory 942 * } 943 * } 944 * 945 * On entry: 946 * source's parent directory is unlocked 947 * source file or directory is unlocked 948 * destination's parent directory is locked 949 * destination file or directory is locked if it exists 950 * 951 * On exit: 952 * all denodes should be released 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 denode *ip, *xp, *dp, *zp; 972 u_char toname[12], oldname[11]; 973 u_long from_diroffset, to_diroffset; 974 u_char to_count; 975 int doingdirectory = 0, newparent = 0; 976 int error; 977 u_long cn, pcl; 978 daddr_t bn; 979 struct denode *fddep; /* from file's parent directory */ 980 struct msdosfsmount *pmp; 981 struct direntry *dotdotp; 982 struct buf *bp; 983 984 fddep = VTODE(ap->a_fdvp); 985 pmp = fddep->de_pmp; 986 987 pmp = VFSTOMSDOSFS(fdvp->v_mount); 988 989 #ifdef DIAGNOSTIC 990 if ((tcnp->cn_flags & HASBUF) == 0 || 991 (fcnp->cn_flags & HASBUF) == 0) 992 panic("msdosfs_rename: no name"); 993 #endif 994 /* 995 * Check for cross-device rename. 996 */ 997 if (fvp->v_mount != tdvp->v_mount || 998 (tvp && fvp->v_mount != tvp->v_mount)) { 999 error = EXDEV; 1000 abortit: 1001 if (tdvp == tvp) 1002 vrele(tdvp); 1003 else 1004 vput(tdvp); 1005 if (tvp) 1006 vput(tvp); 1007 vrele(fdvp); 1008 vrele(fvp); 1009 return (error); 1010 } 1011 1012 /* 1013 * If source and dest are the same, do nothing. 1014 */ 1015 if (tvp == fvp) { 1016 error = 0; 1017 goto abortit; 1018 } 1019 1020 error = vn_lock(fvp, LK_EXCLUSIVE); 1021 if (error) 1022 goto abortit; 1023 dp = VTODE(fdvp); 1024 ip = VTODE(fvp); 1025 1026 /* 1027 * Be sure we are not renaming ".", "..", or an alias of ".". This 1028 * leads to a crippled directory tree. It's pretty tough to do a 1029 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1030 * doesn't work if the ".." entry is missing. 1031 */ 1032 if (ip->de_Attributes & ATTR_DIRECTORY) { 1033 /* 1034 * Avoid ".", "..", and aliases of "." for obvious reasons. 1035 */ 1036 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1037 dp == ip || 1038 (fcnp->cn_flags & ISDOTDOT) || 1039 (tcnp->cn_flags & ISDOTDOT) || 1040 (ip->de_flag & DE_RENAME)) { 1041 VOP_UNLOCK(fvp, 0); 1042 error = EINVAL; 1043 goto abortit; 1044 } 1045 ip->de_flag |= DE_RENAME; 1046 doingdirectory++; 1047 } 1048 1049 /* 1050 * When the target exists, both the directory 1051 * and target vnodes are returned locked. 1052 */ 1053 dp = VTODE(tdvp); 1054 xp = tvp ? VTODE(tvp) : NULL; 1055 /* 1056 * Remember direntry place to use for destination 1057 */ 1058 to_diroffset = dp->de_fndoffset; 1059 to_count = dp->de_fndcnt; 1060 1061 /* 1062 * If ".." must be changed (ie the directory gets a new 1063 * parent) then the source directory must not be in the 1064 * directory hierarchy above the target, as this would 1065 * orphan everything below the source directory. Also 1066 * the user must have write permission in the source so 1067 * as to be able to change "..". We must repeat the call 1068 * to namei, as the parent directory is unlocked by the 1069 * call to doscheckpath(). 1070 */ 1071 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); 1072 VOP_UNLOCK(fvp, 0); 1073 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1074 newparent = 1; 1075 if (doingdirectory && newparent) { 1076 if (error) /* write access check above */ 1077 goto bad; 1078 if (xp != NULL) 1079 vput(tvp); 1080 /* 1081 * doscheckpath() vput()'s dp, 1082 * so we have to do a relookup afterwards 1083 */ 1084 error = doscheckpath(ip, dp); 1085 if (error) 1086 goto out; 1087 if ((tcnp->cn_flags & SAVESTART) == 0) 1088 panic("msdosfs_rename: lost to startdir"); 1089 error = relookup(tdvp, &tvp, tcnp); 1090 if (error) 1091 goto out; 1092 dp = VTODE(tdvp); 1093 xp = tvp ? VTODE(tvp) : NULL; 1094 } 1095 1096 if (xp != NULL) { 1097 /* 1098 * Target must be empty if a directory and have no links 1099 * to it. Also, ensure source and target are compatible 1100 * (both directories, or both not directories). 1101 */ 1102 if (xp->de_Attributes & ATTR_DIRECTORY) { 1103 if (!dosdirempty(xp)) { 1104 error = ENOTEMPTY; 1105 goto bad; 1106 } 1107 if (!doingdirectory) { 1108 error = ENOTDIR; 1109 goto bad; 1110 } 1111 cache_purge(tdvp); 1112 } else if (doingdirectory) { 1113 error = EISDIR; 1114 goto bad; 1115 } 1116 error = removede(dp, xp); 1117 if (error) 1118 goto bad; 1119 vput(tvp); 1120 xp = NULL; 1121 } 1122 1123 /* 1124 * Convert the filename in tcnp into a dos filename. We copy this 1125 * into the denode and directory entry for the destination 1126 * file/directory. 1127 */ 1128 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1129 if (error) 1130 goto abortit; 1131 1132 /* 1133 * Since from wasn't locked at various places above, 1134 * have to do a relookup here. 1135 */ 1136 fcnp->cn_flags &= ~MODMASK; 1137 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1138 if ((fcnp->cn_flags & SAVESTART) == 0) 1139 panic("msdosfs_rename: lost from startdir"); 1140 if (!newparent) 1141 VOP_UNLOCK(tdvp, 0); 1142 if (relookup(fdvp, &fvp, fcnp) == 0) 1143 vrele(fdvp); 1144 if (fvp == NULL) { 1145 /* 1146 * From name has disappeared. 1147 */ 1148 if (doingdirectory) 1149 panic("rename: lost dir entry"); 1150 if (newparent) 1151 VOP_UNLOCK(tdvp, 0); 1152 vrele(tdvp); 1153 vrele(ap->a_fvp); 1154 return 0; 1155 } 1156 xp = VTODE(fvp); 1157 zp = VTODE(fdvp); 1158 from_diroffset = zp->de_fndoffset; 1159 1160 /* 1161 * Ensure that the directory entry still exists and has not 1162 * changed till now. If the source is a file the entry may 1163 * have been unlinked or renamed. In either case there is 1164 * no further work to be done. If the source is a directory 1165 * then it cannot have been rmdir'ed or renamed; this is 1166 * prohibited by the DE_RENAME flag. 1167 */ 1168 if (xp != ip) { 1169 if (doingdirectory) 1170 panic("rename: lost dir entry"); 1171 VOP_UNLOCK(fvp, 0); 1172 if (newparent) 1173 VOP_UNLOCK(fdvp, 0); 1174 vrele(ap->a_fvp); 1175 xp = NULL; 1176 } else { 1177 vrele(fvp); 1178 xp = NULL; 1179 1180 /* 1181 * First write a new entry in the destination 1182 * directory and mark the entry in the source directory 1183 * as deleted. Then move the denode to the correct hash 1184 * chain for its new location in the filesystem. And, if 1185 * we moved a directory, then update its .. entry to point 1186 * to the new parent directory. 1187 */ 1188 bcopy(ip->de_Name, oldname, 11); 1189 bcopy(toname, ip->de_Name, 11); /* update denode */ 1190 dp->de_fndoffset = to_diroffset; 1191 dp->de_fndcnt = to_count; 1192 error = createde(ip, dp, (struct denode **)0, tcnp); 1193 if (error) { 1194 bcopy(oldname, ip->de_Name, 11); 1195 if (newparent) 1196 VOP_UNLOCK(fdvp, 0); 1197 VOP_UNLOCK(fvp, 0); 1198 goto bad; 1199 } 1200 ip->de_refcnt++; 1201 zp->de_fndoffset = from_diroffset; 1202 error = removede(zp, ip); 1203 if (error) { 1204 /* XXX should downgrade to ro here, fs is corrupt */ 1205 if (newparent) 1206 VOP_UNLOCK(fdvp, 0); 1207 VOP_UNLOCK(fvp, 0); 1208 goto bad; 1209 } 1210 if (!doingdirectory) { 1211 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1212 &ip->de_dirclust, 0); 1213 if (error) { 1214 /* XXX should downgrade to ro here, fs is corrupt */ 1215 if (newparent) 1216 VOP_UNLOCK(fdvp, 0); 1217 VOP_UNLOCK(fvp, 0); 1218 goto bad; 1219 } 1220 if (ip->de_dirclust == MSDOSFSROOT) 1221 ip->de_diroffset = to_diroffset; 1222 else 1223 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1224 } 1225 reinsert(ip); 1226 if (newparent) 1227 VOP_UNLOCK(fdvp, 0); 1228 } 1229 1230 /* 1231 * If we moved a directory to a new parent directory, then we must 1232 * fixup the ".." entry in the moved directory. 1233 */ 1234 if (doingdirectory && newparent) { 1235 cn = ip->de_StartCluster; 1236 if (cn == MSDOSFSROOT) { 1237 /* this should never happen */ 1238 panic("msdosfs_rename(): updating .. in root directory?"); 1239 } else 1240 bn = cntobn(pmp, cn); 1241 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1242 NOCRED, &bp); 1243 if (error) { 1244 /* XXX should downgrade to ro here, fs is corrupt */ 1245 brelse(bp); 1246 VOP_UNLOCK(fvp, 0); 1247 goto bad; 1248 } 1249 dotdotp = (struct direntry *)bp->b_data + 1; 1250 pcl = dp->de_StartCluster; 1251 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1252 pcl = MSDOSFSROOT; 1253 putushort(dotdotp->deStartCluster, pcl); 1254 if (FAT32(pmp)) 1255 putushort(dotdotp->deHighClust, pcl >> 16); 1256 if (fvp->v_mount->mnt_flag & MNT_ASYNC) 1257 bdwrite(bp); 1258 else if ((error = bwrite(bp)) != 0) { 1259 /* XXX should downgrade to ro here, fs is corrupt */ 1260 VOP_UNLOCK(fvp, 0); 1261 goto bad; 1262 } 1263 } 1264 1265 /* 1266 * The msdosfs lookup is case insensitive. Several aliases may 1267 * be inserted for a single directory entry. As a consequnce, 1268 * name cache purge done by lookup for fvp when DELETE op for 1269 * namei is specified, might be not enough to expunge all 1270 * namecache entries that were installed for this direntry. 1271 */ 1272 cache_purge(fvp); 1273 VOP_UNLOCK(fvp, 0); 1274 bad: 1275 if (xp) 1276 vput(tvp); 1277 vput(tdvp); 1278 out: 1279 ip->de_flag &= ~DE_RENAME; 1280 vrele(fdvp); 1281 vrele(fvp); 1282 return (error); 1283 1284 } 1285 1286 static struct { 1287 struct direntry dot; 1288 struct direntry dotdot; 1289 } dosdirtemplate = { 1290 { ". ", /* the . entry */ 1291 ATTR_DIRECTORY, /* file attribute */ 1292 0, /* reserved */ 1293 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1294 { 0, 0 }, /* access date */ 1295 { 0, 0 }, /* high bits of start cluster */ 1296 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1297 { 0, 0 }, /* startcluster */ 1298 { 0, 0, 0, 0 } /* filesize */ 1299 }, 1300 { ".. ", /* the .. entry */ 1301 ATTR_DIRECTORY, /* file attribute */ 1302 0, /* reserved */ 1303 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1304 { 0, 0 }, /* access date */ 1305 { 0, 0 }, /* high bits of start cluster */ 1306 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1307 { 0, 0 }, /* startcluster */ 1308 { 0, 0, 0, 0 } /* filesize */ 1309 } 1310 }; 1311 1312 static int 1313 msdosfs_mkdir(ap) 1314 struct vop_mkdir_args /* { 1315 struct vnode *a_dvp; 1316 struct vnode **a_vpp; 1317 struvt componentname *a_cnp; 1318 struct vattr *a_vap; 1319 } */ *ap; 1320 { 1321 struct componentname *cnp = ap->a_cnp; 1322 struct denode *dep; 1323 struct denode *pdep = VTODE(ap->a_dvp); 1324 struct direntry *denp; 1325 struct msdosfsmount *pmp = pdep->de_pmp; 1326 struct buf *bp; 1327 u_long newcluster, pcl; 1328 int bn; 1329 int error; 1330 struct denode ndirent; 1331 struct timespec ts; 1332 1333 /* 1334 * If this is the root directory and there is no space left we 1335 * can't do anything. This is because the root directory can not 1336 * change size. 1337 */ 1338 if (pdep->de_StartCluster == MSDOSFSROOT 1339 && pdep->de_fndoffset >= pdep->de_FileSize) { 1340 error = ENOSPC; 1341 goto bad2; 1342 } 1343 1344 /* 1345 * Allocate a cluster to hold the about to be created directory. 1346 */ 1347 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1348 if (error) 1349 goto bad2; 1350 1351 bzero(&ndirent, sizeof(ndirent)); 1352 ndirent.de_pmp = pmp; 1353 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1354 getnanotime(&ts); 1355 DETIMES(&ndirent, &ts, &ts, &ts); 1356 1357 /* 1358 * Now fill the cluster with the "." and ".." entries. And write 1359 * the cluster to disk. This way it is there for the parent 1360 * directory to be pointing at if there were a crash. 1361 */ 1362 bn = cntobn(pmp, newcluster); 1363 /* always succeeds */ 1364 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0, 0); 1365 bzero(bp->b_data, pmp->pm_bpcluster); 1366 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1367 denp = (struct direntry *)bp->b_data; 1368 putushort(denp[0].deStartCluster, newcluster); 1369 putushort(denp[0].deCDate, ndirent.de_CDate); 1370 putushort(denp[0].deCTime, ndirent.de_CTime); 1371 denp[0].deCHundredth = ndirent.de_CHun; 1372 putushort(denp[0].deADate, ndirent.de_ADate); 1373 putushort(denp[0].deMDate, ndirent.de_MDate); 1374 putushort(denp[0].deMTime, ndirent.de_MTime); 1375 pcl = pdep->de_StartCluster; 1376 /* 1377 * Although the root directory has a non-magic starting cluster 1378 * number for FAT32, chkdsk and fsck_msdosfs still require 1379 * references to it in dotdot entries to be magic. 1380 */ 1381 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1382 pcl = MSDOSFSROOT; 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, pcl >> 16); 1393 } 1394 1395 if (ap->a_dvp->v_mount->mnt_flag & MNT_ASYNC) 1396 bdwrite(bp); 1397 else if ((error = bwrite(bp)) != 0) 1398 goto bad; 1399 1400 /* 1401 * Now build up a directory entry pointing to the newly allocated 1402 * cluster. This will be written to an empty slot in the parent 1403 * directory. 1404 */ 1405 #ifdef DIAGNOSTIC 1406 if ((cnp->cn_flags & HASBUF) == 0) 1407 panic("msdosfs_mkdir: no name"); 1408 #endif 1409 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1410 if (error) 1411 goto bad; 1412 1413 ndirent.de_Attributes = ATTR_DIRECTORY; 1414 ndirent.de_LowerCase = 0; 1415 ndirent.de_StartCluster = newcluster; 1416 ndirent.de_FileSize = 0; 1417 error = createde(&ndirent, pdep, &dep, cnp); 1418 if (error) 1419 goto bad; 1420 *ap->a_vpp = DETOV(dep); 1421 return (0); 1422 1423 bad: 1424 clusterfree(pmp, newcluster, NULL); 1425 bad2: 1426 return (error); 1427 } 1428 1429 static int 1430 msdosfs_rmdir(ap) 1431 struct vop_rmdir_args /* { 1432 struct vnode *a_dvp; 1433 struct vnode *a_vp; 1434 struct componentname *a_cnp; 1435 } */ *ap; 1436 { 1437 struct vnode *vp = ap->a_vp; 1438 struct vnode *dvp = ap->a_dvp; 1439 struct componentname *cnp = ap->a_cnp; 1440 struct denode *ip, *dp; 1441 struct thread *td = cnp->cn_thread; 1442 int error; 1443 1444 ip = VTODE(vp); 1445 dp = VTODE(dvp); 1446 1447 /* 1448 * Verify the directory is empty (and valid). 1449 * (Rmdir ".." won't be valid since 1450 * ".." will contain a reference to 1451 * the current directory and thus be 1452 * non-empty.) 1453 */ 1454 error = 0; 1455 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1456 error = ENOTEMPTY; 1457 goto out; 1458 } 1459 /* 1460 * Delete the entry from the directory. For dos filesystems this 1461 * gets rid of the directory entry on disk, the in memory copy 1462 * still exists but the de_refcnt is <= 0. This prevents it from 1463 * being found by deget(). When the vput() on dep is done we give 1464 * up access and eventually msdosfs_reclaim() will be called which 1465 * will remove it from the denode cache. 1466 */ 1467 error = removede(dp, ip); 1468 if (error) 1469 goto out; 1470 /* 1471 * This is where we decrement the link count in the parent 1472 * directory. Since dos filesystems don't do this we just purge 1473 * the name cache. 1474 */ 1475 cache_purge(dvp); 1476 /* 1477 * Truncate the directory that is being deleted. 1478 */ 1479 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, td); 1480 cache_purge(vp); 1481 1482 out: 1483 return (error); 1484 } 1485 1486 /* 1487 * DOS filesystems don't know what symlinks are. 1488 */ 1489 static int 1490 msdosfs_symlink(ap) 1491 struct vop_symlink_args /* { 1492 struct vnode *a_dvp; 1493 struct vnode **a_vpp; 1494 struct componentname *a_cnp; 1495 struct vattr *a_vap; 1496 char *a_target; 1497 } */ *ap; 1498 { 1499 return (EOPNOTSUPP); 1500 } 1501 1502 static int 1503 msdosfs_readdir(ap) 1504 struct vop_readdir_args /* { 1505 struct vnode *a_vp; 1506 struct uio *a_uio; 1507 struct ucred *a_cred; 1508 int *a_eofflag; 1509 int *a_ncookies; 1510 u_long **a_cookies; 1511 } */ *ap; 1512 { 1513 struct mbnambuf nb; 1514 int error = 0; 1515 int diff; 1516 long n; 1517 int blsize; 1518 long on; 1519 u_long cn; 1520 uint64_t fileno; 1521 u_long dirsperblk; 1522 long bias = 0; 1523 daddr_t bn, lbn; 1524 struct buf *bp; 1525 struct denode *dep = VTODE(ap->a_vp); 1526 struct msdosfsmount *pmp = dep->de_pmp; 1527 struct direntry *dentp; 1528 struct dirent dirbuf; 1529 struct uio *uio = ap->a_uio; 1530 u_long *cookies = NULL; 1531 int ncookies = 0; 1532 off_t offset, off; 1533 int chksum = -1; 1534 1535 #ifdef MSDOSFS_DEBUG 1536 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1537 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1538 #endif 1539 1540 /* 1541 * msdosfs_readdir() won't operate properly on regular files since 1542 * it does i/o only with the filesystem vnode, and hence can 1543 * retrieve the wrong block from the buffer cache for a plain file. 1544 * So, fail attempts to readdir() on a plain file. 1545 */ 1546 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1547 return (ENOTDIR); 1548 1549 /* 1550 * To be safe, initialize dirbuf 1551 */ 1552 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1553 1554 /* 1555 * If the user buffer is smaller than the size of one dos directory 1556 * entry or the file offset is not a multiple of the size of a 1557 * directory entry, then we fail the read. 1558 */ 1559 off = offset = uio->uio_offset; 1560 if (uio->uio_resid < sizeof(struct direntry) || 1561 (offset & (sizeof(struct direntry) - 1))) 1562 return (EINVAL); 1563 1564 if (ap->a_ncookies) { 1565 ncookies = uio->uio_resid / 16; 1566 cookies = malloc(ncookies * sizeof(u_long), M_TEMP, 1567 M_WAITOK); 1568 *ap->a_cookies = cookies; 1569 *ap->a_ncookies = ncookies; 1570 } 1571 1572 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1573 1574 /* 1575 * If they are reading from the root directory then, we simulate 1576 * the . and .. entries since these don't exist in the root 1577 * directory. We also set the offset bias to make up for having to 1578 * simulate these entries. By this I mean that at file offset 64 we 1579 * read the first entry in the root directory that lives on disk. 1580 */ 1581 if (dep->de_StartCluster == MSDOSFSROOT 1582 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1583 #if 0 1584 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1585 offset); 1586 #endif 1587 bias = 2 * sizeof(struct direntry); 1588 if (offset < bias) { 1589 for (n = (int)offset / sizeof(struct direntry); 1590 n < 2; n++) { 1591 if (FAT32(pmp)) 1592 fileno = (uint64_t)cntobn(pmp, 1593 pmp->pm_rootdirblk) 1594 * dirsperblk; 1595 else 1596 fileno = 1; 1597 if (pmp->pm_flags & MSDOSFS_LARGEFS) { 1598 dirbuf.d_fileno = 1599 msdosfs_fileno_map(pmp->pm_mountp, 1600 fileno); 1601 } else { 1602 1603 dirbuf.d_fileno = (uint32_t)fileno; 1604 } 1605 dirbuf.d_type = DT_DIR; 1606 switch (n) { 1607 case 0: 1608 dirbuf.d_namlen = 1; 1609 strcpy(dirbuf.d_name, "."); 1610 break; 1611 case 1: 1612 dirbuf.d_namlen = 2; 1613 strcpy(dirbuf.d_name, ".."); 1614 break; 1615 } 1616 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1617 if (uio->uio_resid < dirbuf.d_reclen) 1618 goto out; 1619 error = uiomove(&dirbuf, dirbuf.d_reclen, uio); 1620 if (error) 1621 goto out; 1622 offset += sizeof(struct direntry); 1623 off = offset; 1624 if (cookies) { 1625 *cookies++ = offset; 1626 if (--ncookies <= 0) 1627 goto out; 1628 } 1629 } 1630 } 1631 } 1632 1633 mbnambuf_init(&nb); 1634 off = offset; 1635 while (uio->uio_resid > 0) { 1636 lbn = de_cluster(pmp, offset - bias); 1637 on = (offset - bias) & pmp->pm_crbomask; 1638 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1639 diff = dep->de_FileSize - (offset - bias); 1640 if (diff <= 0) 1641 break; 1642 n = min(n, diff); 1643 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1644 if (error) 1645 break; 1646 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1647 if (error) { 1648 brelse(bp); 1649 return (error); 1650 } 1651 n = min(n, blsize - bp->b_resid); 1652 if (n == 0) { 1653 brelse(bp); 1654 return (EIO); 1655 } 1656 1657 /* 1658 * Convert from dos directory entries to fs-independent 1659 * directory entries. 1660 */ 1661 for (dentp = (struct direntry *)(bp->b_data + on); 1662 (char *)dentp < bp->b_data + on + n; 1663 dentp++, offset += sizeof(struct direntry)) { 1664 #if 0 1665 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1666 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1667 #endif 1668 /* 1669 * If this is an unused entry, we can stop. 1670 */ 1671 if (dentp->deName[0] == SLOT_EMPTY) { 1672 brelse(bp); 1673 goto out; 1674 } 1675 /* 1676 * Skip deleted entries. 1677 */ 1678 if (dentp->deName[0] == SLOT_DELETED) { 1679 chksum = -1; 1680 mbnambuf_init(&nb); 1681 continue; 1682 } 1683 1684 /* 1685 * Handle Win95 long directory entries 1686 */ 1687 if (dentp->deAttributes == ATTR_WIN95) { 1688 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1689 continue; 1690 chksum = win2unixfn(&nb, 1691 (struct winentry *)dentp, chksum, pmp); 1692 continue; 1693 } 1694 1695 /* 1696 * Skip volume labels 1697 */ 1698 if (dentp->deAttributes & ATTR_VOLUME) { 1699 chksum = -1; 1700 mbnambuf_init(&nb); 1701 continue; 1702 } 1703 /* 1704 * This computation of d_fileno must match 1705 * the computation of va_fileid in 1706 * msdosfs_getattr. 1707 */ 1708 if (dentp->deAttributes & ATTR_DIRECTORY) { 1709 fileno = getushort(dentp->deStartCluster); 1710 if (FAT32(pmp)) 1711 fileno |= getushort(dentp->deHighClust) << 16; 1712 /* if this is the root directory */ 1713 if (fileno == MSDOSFSROOT) 1714 if (FAT32(pmp)) 1715 fileno = (uint64_t)cntobn(pmp, 1716 pmp->pm_rootdirblk) 1717 * dirsperblk; 1718 else 1719 fileno = 1; 1720 else 1721 fileno = (uint64_t)cntobn(pmp, fileno) * 1722 dirsperblk; 1723 dirbuf.d_type = DT_DIR; 1724 } else { 1725 fileno = (uoff_t)offset / 1726 sizeof(struct direntry); 1727 dirbuf.d_type = DT_REG; 1728 } 1729 if (pmp->pm_flags & MSDOSFS_LARGEFS) { 1730 dirbuf.d_fileno = 1731 msdosfs_fileno_map(pmp->pm_mountp, fileno); 1732 } else 1733 dirbuf.d_fileno = (uint32_t)fileno; 1734 1735 if (chksum != winChksum(dentp->deName)) { 1736 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1737 (u_char *)dirbuf.d_name, 1738 dentp->deLowerCase | 1739 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1740 (LCASE_BASE | LCASE_EXT) : 0), 1741 pmp); 1742 mbnambuf_init(&nb); 1743 } else 1744 mbnambuf_flush(&nb, &dirbuf); 1745 chksum = -1; 1746 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1747 if (uio->uio_resid < dirbuf.d_reclen) { 1748 brelse(bp); 1749 goto out; 1750 } 1751 error = uiomove(&dirbuf, dirbuf.d_reclen, uio); 1752 if (error) { 1753 brelse(bp); 1754 goto out; 1755 } 1756 if (cookies) { 1757 *cookies++ = offset + sizeof(struct direntry); 1758 if (--ncookies <= 0) { 1759 brelse(bp); 1760 goto out; 1761 } 1762 } 1763 off = offset + sizeof(struct direntry); 1764 } 1765 brelse(bp); 1766 } 1767 out: 1768 /* Subtract unused cookies */ 1769 if (ap->a_ncookies) 1770 *ap->a_ncookies -= ncookies; 1771 1772 uio->uio_offset = off; 1773 1774 /* 1775 * Set the eofflag (NFS uses it) 1776 */ 1777 if (ap->a_eofflag) { 1778 if (dep->de_FileSize - (offset - bias) <= 0) 1779 *ap->a_eofflag = 1; 1780 else 1781 *ap->a_eofflag = 0; 1782 } 1783 return (error); 1784 } 1785 1786 /*- 1787 * a_vp - pointer to the file's vnode 1788 * a_bn - logical block number within the file (cluster number for us) 1789 * a_bop - where to return the bufobj of the special file containing the fs 1790 * a_bnp - where to return the "physical" block number corresponding to a_bn 1791 * (relative to the special file; units are blocks of size DEV_BSIZE) 1792 * a_runp - where to return the "run past" a_bn. This is the count of logical 1793 * blocks whose physical blocks (together with a_bn's physical block) 1794 * are contiguous. 1795 * a_runb - where to return the "run before" a_bn. 1796 */ 1797 static int 1798 msdosfs_bmap(ap) 1799 struct vop_bmap_args /* { 1800 struct vnode *a_vp; 1801 daddr_t a_bn; 1802 struct bufobj **a_bop; 1803 daddr_t *a_bnp; 1804 int *a_runp; 1805 int *a_runb; 1806 } */ *ap; 1807 { 1808 struct denode *dep; 1809 struct mount *mp; 1810 struct msdosfsmount *pmp; 1811 struct vnode *vp; 1812 daddr_t runbn; 1813 u_long cn; 1814 int bnpercn, error, maxio, maxrun, run; 1815 1816 vp = ap->a_vp; 1817 dep = VTODE(vp); 1818 pmp = dep->de_pmp; 1819 if (ap->a_bop != NULL) 1820 *ap->a_bop = &pmp->pm_devvp->v_bufobj; 1821 if (ap->a_bnp == NULL) 1822 return (0); 1823 if (ap->a_runp != NULL) 1824 *ap->a_runp = 0; 1825 if (ap->a_runb != NULL) 1826 *ap->a_runb = 0; 1827 cn = ap->a_bn; 1828 if (cn != ap->a_bn) 1829 return (EFBIG); 1830 error = pcbmap(dep, cn, ap->a_bnp, NULL, NULL); 1831 if (error != 0 || (ap->a_runp == NULL && ap->a_runb == NULL)) 1832 return (error); 1833 1834 mp = vp->v_mount; 1835 maxio = mp->mnt_iosize_max / mp->mnt_stat.f_iosize; 1836 bnpercn = de_cn2bn(pmp, 1); 1837 if (ap->a_runp != NULL) { 1838 maxrun = ulmin(maxio - 1, pmp->pm_maxcluster - cn); 1839 for (run = 1; run <= maxrun; run++) { 1840 if (pcbmap(dep, cn + run, &runbn, NULL, NULL) != 0 || 1841 runbn != *ap->a_bnp + run * bnpercn) 1842 break; 1843 } 1844 *ap->a_runp = run - 1; 1845 } 1846 if (ap->a_runb != NULL) { 1847 maxrun = ulmin(maxio - 1, cn); 1848 for (run = 1; run < maxrun; run++) { 1849 if (pcbmap(dep, cn - run, &runbn, NULL, NULL) != 0 || 1850 runbn != *ap->a_bnp - run * bnpercn) 1851 break; 1852 } 1853 *ap->a_runb = run - 1; 1854 } 1855 return (0); 1856 } 1857 1858 static int 1859 msdosfs_strategy(ap) 1860 struct vop_strategy_args /* { 1861 struct vnode *a_vp; 1862 struct buf *a_bp; 1863 } */ *ap; 1864 { 1865 struct buf *bp = ap->a_bp; 1866 struct denode *dep = VTODE(ap->a_vp); 1867 struct bufobj *bo; 1868 int error = 0; 1869 daddr_t blkno; 1870 1871 /* 1872 * If we don't already know the filesystem relative block number 1873 * then get it using pcbmap(). If pcbmap() returns the block 1874 * number as -1 then we've got a hole in the file. DOS filesystems 1875 * don't allow files with holes, so we shouldn't ever see this. 1876 */ 1877 if (bp->b_blkno == bp->b_lblkno) { 1878 error = pcbmap(dep, bp->b_lblkno, &blkno, 0, 0); 1879 bp->b_blkno = blkno; 1880 if (error) { 1881 bp->b_error = error; 1882 bp->b_ioflags |= BIO_ERROR; 1883 bufdone(bp); 1884 return (0); 1885 } 1886 if ((long)bp->b_blkno == -1) 1887 vfs_bio_clrbuf(bp); 1888 } 1889 if (bp->b_blkno == -1) { 1890 bufdone(bp); 1891 return (0); 1892 } 1893 /* 1894 * Read/write the block from/to the disk that contains the desired 1895 * file block. 1896 */ 1897 bp->b_iooffset = dbtob(bp->b_blkno); 1898 bo = dep->de_pmp->pm_bo; 1899 BO_STRATEGY(bo, bp); 1900 return (0); 1901 } 1902 1903 static int 1904 msdosfs_print(ap) 1905 struct vop_print_args /* { 1906 struct vnode *vp; 1907 } */ *ap; 1908 { 1909 struct denode *dep = VTODE(ap->a_vp); 1910 1911 printf("\tstartcluster %lu, dircluster %lu, diroffset %lu, ", 1912 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1913 printf("on dev %s\n", devtoname(dep->de_pmp->pm_dev)); 1914 return (0); 1915 } 1916 1917 static int 1918 msdosfs_pathconf(ap) 1919 struct vop_pathconf_args /* { 1920 struct vnode *a_vp; 1921 int a_name; 1922 int *a_retval; 1923 } */ *ap; 1924 { 1925 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1926 1927 switch (ap->a_name) { 1928 case _PC_LINK_MAX: 1929 *ap->a_retval = 1; 1930 return (0); 1931 case _PC_NAME_MAX: 1932 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1933 return (0); 1934 case _PC_PATH_MAX: 1935 *ap->a_retval = PATH_MAX; 1936 return (0); 1937 case _PC_CHOWN_RESTRICTED: 1938 *ap->a_retval = 1; 1939 return (0); 1940 case _PC_NO_TRUNC: 1941 *ap->a_retval = 0; 1942 return (0); 1943 default: 1944 return (EINVAL); 1945 } 1946 /* NOTREACHED */ 1947 } 1948 1949 static int 1950 msdosfs_vptofh(ap) 1951 struct vop_vptofh_args /* { 1952 struct vnode *a_vp; 1953 struct fid *a_fhp; 1954 } */ *ap; 1955 { 1956 struct denode *dep; 1957 struct defid *defhp; 1958 1959 dep = VTODE(ap->a_vp); 1960 defhp = (struct defid *)ap->a_fhp; 1961 defhp->defid_len = sizeof(struct defid); 1962 defhp->defid_dirclust = dep->de_dirclust; 1963 defhp->defid_dirofs = dep->de_diroffset; 1964 /* defhp->defid_gen = dep->de_gen; */ 1965 return (0); 1966 } 1967 1968 /* Global vfs data structures for msdosfs */ 1969 struct vop_vector msdosfs_vnodeops = { 1970 .vop_default = &default_vnodeops, 1971 1972 .vop_access = msdosfs_access, 1973 .vop_bmap = msdosfs_bmap, 1974 .vop_cachedlookup = msdosfs_lookup, 1975 .vop_open = msdosfs_open, 1976 .vop_close = msdosfs_close, 1977 .vop_create = msdosfs_create, 1978 .vop_fsync = msdosfs_fsync, 1979 .vop_getattr = msdosfs_getattr, 1980 .vop_inactive = msdosfs_inactive, 1981 .vop_link = msdosfs_link, 1982 .vop_lookup = vfs_cache_lookup, 1983 .vop_mkdir = msdosfs_mkdir, 1984 .vop_mknod = msdosfs_mknod, 1985 .vop_pathconf = msdosfs_pathconf, 1986 .vop_print = msdosfs_print, 1987 .vop_read = msdosfs_read, 1988 .vop_readdir = msdosfs_readdir, 1989 .vop_reclaim = msdosfs_reclaim, 1990 .vop_remove = msdosfs_remove, 1991 .vop_rename = msdosfs_rename, 1992 .vop_rmdir = msdosfs_rmdir, 1993 .vop_setattr = msdosfs_setattr, 1994 .vop_strategy = msdosfs_strategy, 1995 .vop_symlink = msdosfs_symlink, 1996 .vop_write = msdosfs_write, 1997 .vop_vptofh = msdosfs_vptofh, 1998 };
Cache object: 05a4027ee04081721d4818e5a252a578
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