1 /* $FreeBSD$ */ 2 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 3 4 /*- 5 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 6 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 7 * All rights reserved. 8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by TooLs GmbH. 21 * 4. The name of TooLs GmbH may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /*- 36 * Written by Paul Popelka (paulp@uts.amdahl.com) 37 * 38 * You can do anything you want with this software, just don't say you wrote 39 * it, and don't remove this notice. 40 * 41 * This software is provided "as is". 42 * 43 * The author supplies this software to be publicly redistributed on the 44 * understanding that the author is not responsible for the correct 45 * functioning of this software in any circumstances and is not liable for 46 * any damages caused by this software. 47 * 48 * October 1992 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/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/proc.h> 65 #include <sys/resourcevar.h> 66 #include <sys/signalvar.h> 67 #include <sys/stat.h> 68 #include <sys/unistd.h> 69 #include <sys/vnode.h> 70 71 #include <vm/vm.h> 72 #include <vm/vm_extern.h> 73 74 #include <fs/msdosfs/bpb.h> 75 #include <fs/msdosfs/direntry.h> 76 #include <fs/msdosfs/denode.h> 77 #include <fs/msdosfs/fat.h> 78 #include <fs/msdosfs/msdosfsmount.h> 79 80 #define DOS_FILESIZE_MAX 0xffffffff 81 82 /* 83 * Prototypes for MSDOSFS vnode operations 84 */ 85 static vop_advlock_t msdosfs_advlock; 86 static vop_advlockasync_t msdosfs_advlockasync; 87 static vop_create_t msdosfs_create; 88 static vop_mknod_t msdosfs_mknod; 89 static vop_open_t msdosfs_open; 90 static vop_close_t msdosfs_close; 91 static vop_access_t msdosfs_access; 92 static vop_getattr_t msdosfs_getattr; 93 static vop_setattr_t msdosfs_setattr; 94 static vop_read_t msdosfs_read; 95 static vop_write_t msdosfs_write; 96 static vop_fsync_t msdosfs_fsync; 97 static vop_remove_t msdosfs_remove; 98 static vop_link_t msdosfs_link; 99 static vop_rename_t msdosfs_rename; 100 static vop_mkdir_t msdosfs_mkdir; 101 static vop_rmdir_t msdosfs_rmdir; 102 static vop_symlink_t msdosfs_symlink; 103 static vop_readdir_t msdosfs_readdir; 104 static vop_bmap_t msdosfs_bmap; 105 static vop_strategy_t msdosfs_strategy; 106 static vop_print_t msdosfs_print; 107 static vop_pathconf_t msdosfs_pathconf; 108 static vop_vptofh_t msdosfs_vptofh; 109 110 /* 111 * Some general notes: 112 * 113 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 114 * read/written using the vnode for the filesystem. Blocks that represent 115 * the contents of a file are read/written using the vnode for the file 116 * (including directories when they are read/written as files). This 117 * presents problems for the dos filesystem because data that should be in 118 * an inode (if dos had them) resides in the directory itself. Since we 119 * must update directory entries without the benefit of having the vnode 120 * for the directory we must use the vnode for the filesystem. This means 121 * that when a directory is actually read/written (via read, write, or 122 * readdir, or seek) we must use the vnode for the filesystem instead of 123 * the vnode for the directory as would happen in ufs. This is to insure we 124 * retreive the correct block from the buffer cache since the hash value is 125 * based upon the vnode address and the desired block number. 126 */ 127 128 /* 129 * Create a regular file. On entry the directory to contain the file being 130 * created is locked. We must release before we return. We must also free 131 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 132 * only if the SAVESTART bit in cn_flags is clear on success. 133 */ 134 static int 135 msdosfs_create(ap) 136 struct vop_create_args /* { 137 struct vnode *a_dvp; 138 struct vnode **a_vpp; 139 struct componentname *a_cnp; 140 struct vattr *a_vap; 141 } */ *ap; 142 { 143 struct componentname *cnp = ap->a_cnp; 144 struct denode ndirent; 145 struct denode *dep; 146 struct denode *pdep = VTODE(ap->a_dvp); 147 struct timespec ts; 148 int error; 149 150 #ifdef MSDOSFS_DEBUG 151 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 152 #endif 153 154 /* 155 * If this is the root directory and there is no space left we 156 * can't do anything. This is because the root directory can not 157 * change size. 158 */ 159 if (pdep->de_StartCluster == MSDOSFSROOT 160 && pdep->de_fndoffset >= pdep->de_FileSize) { 161 error = ENOSPC; 162 goto bad; 163 } 164 165 /* 166 * Create a directory entry for the file, then call createde() to 167 * have it installed. NOTE: DOS files are always executable. We 168 * use the absence of the owner write bit to make the file 169 * readonly. 170 */ 171 #ifdef DIAGNOSTIC 172 if ((cnp->cn_flags & HASBUF) == 0) 173 panic("msdosfs_create: no name"); 174 #endif 175 bzero(&ndirent, sizeof(ndirent)); 176 error = uniqdosname(pdep, cnp, ndirent.de_Name); 177 if (error) 178 goto bad; 179 180 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 181 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 182 ndirent.de_LowerCase = 0; 183 ndirent.de_StartCluster = 0; 184 ndirent.de_FileSize = 0; 185 ndirent.de_dev = pdep->de_dev; 186 ndirent.de_pmp = pdep->de_pmp; 187 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 188 getnanotime(&ts); 189 DETIMES(&ndirent, &ts, &ts, &ts); 190 error = createde(&ndirent, pdep, &dep, cnp); 191 if (error) 192 goto bad; 193 *ap->a_vpp = DETOV(dep); 194 return (0); 195 196 bad: 197 return (error); 198 } 199 200 static int 201 msdosfs_mknod(ap) 202 struct vop_mknod_args /* { 203 struct vnode *a_dvp; 204 struct vnode **a_vpp; 205 struct componentname *a_cnp; 206 struct vattr *a_vap; 207 } */ *ap; 208 { 209 210 return (EINVAL); 211 } 212 213 static int 214 msdosfs_open(ap) 215 struct vop_open_args /* { 216 struct vnode *a_vp; 217 int a_mode; 218 struct ucred *a_cred; 219 struct thread *a_td; 220 int a_fdidx; 221 } */ *ap; 222 { 223 struct denode *dep = VTODE(ap->a_vp); 224 vnode_create_vobject(ap->a_vp, dep->de_FileSize, ap->a_td); 225 return 0; 226 } 227 228 static int 229 msdosfs_close(ap) 230 struct vop_close_args /* { 231 struct vnode *a_vp; 232 int a_fflag; 233 struct ucred *a_cred; 234 struct thread *a_td; 235 } */ *ap; 236 { 237 struct vnode *vp = ap->a_vp; 238 struct denode *dep = VTODE(vp); 239 struct timespec ts; 240 241 VI_LOCK(vp); 242 if (vp->v_usecount > 1) { 243 getnanotime(&ts); 244 DETIMES(dep, &ts, &ts, &ts); 245 } 246 VI_UNLOCK(vp); 247 return 0; 248 } 249 250 static int 251 msdosfs_access(ap) 252 struct vop_access_args /* { 253 struct vnode *a_vp; 254 int a_mode; 255 struct ucred *a_cred; 256 struct thread *a_td; 257 } */ *ap; 258 { 259 struct vnode *vp = ap->a_vp; 260 struct denode *dep = VTODE(ap->a_vp); 261 struct msdosfsmount *pmp = dep->de_pmp; 262 mode_t file_mode, mode = ap->a_mode; 263 264 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 265 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 266 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 267 268 /* 269 * Disallow writing to directories and regular files if the 270 * filesystem is read-only. 271 */ 272 if (mode & VWRITE) { 273 switch (vp->v_type) { 274 case VDIR: 275 case VREG: 276 if (vp->v_mount->mnt_flag & MNT_RDONLY) 277 return (EROFS); 278 break; 279 default: 280 break; 281 } 282 } 283 284 return (vaccess(vp->v_type, file_mode, pmp->pm_uid, pmp->pm_gid, 285 ap->a_mode, ap->a_cred, NULL)); 286 } 287 288 static int 289 msdosfs_getattr(ap) 290 struct vop_getattr_args /* { 291 struct vnode *a_vp; 292 struct vattr *a_vap; 293 struct ucred *a_cred; 294 struct thread *a_td; 295 } */ *ap; 296 { 297 struct denode *dep = VTODE(ap->a_vp); 298 struct msdosfsmount *pmp = dep->de_pmp; 299 struct vattr *vap = ap->a_vap; 300 mode_t mode; 301 struct timespec ts; 302 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 303 uint64_t fileid; 304 305 getnanotime(&ts); 306 DETIMES(dep, &ts, &ts, &ts); 307 vap->va_fsid = dev2udev(dep->de_dev); 308 /* 309 * The following computation of the fileid must be the same as that 310 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 311 * doesn't work. 312 */ 313 if (dep->de_Attributes & ATTR_DIRECTORY) { 314 fileid = (uint64_t)cntobn(pmp, dep->de_StartCluster) * 315 dirsperblk; 316 if (dep->de_StartCluster == MSDOSFSROOT) 317 fileid = 1; 318 } else { 319 fileid = (uint64_t)cntobn(pmp, dep->de_dirclust) * 320 dirsperblk; 321 if (dep->de_dirclust == MSDOSFSROOT) 322 fileid = (uint64_t)roottobn(pmp, 0) * dirsperblk; 323 fileid += (uoff_t)dep->de_diroffset / sizeof(struct direntry); 324 } 325 326 if (pmp->pm_flags & MSDOSFS_LARGEFS) 327 vap->va_fileid = msdosfs_fileno_map(pmp->pm_mountp, fileid); 328 else 329 vap->va_fileid = (long)fileid; 330 331 if ((dep->de_Attributes & ATTR_READONLY) == 0) 332 mode = S_IRWXU|S_IRWXG|S_IRWXO; 333 else 334 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 335 vap->va_mode = mode & 336 (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 337 vap->va_uid = pmp->pm_uid; 338 vap->va_gid = pmp->pm_gid; 339 vap->va_nlink = 1; 340 vap->va_rdev = 0; 341 vap->va_size = dep->de_FileSize; 342 fattime2timespec(dep->de_MDate, dep->de_MTime, 0, 0, &vap->va_mtime); 343 vap->va_ctime = vap->va_mtime; 344 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 345 fattime2timespec(dep->de_ADate, 0, 0, 0, &vap->va_atime); 346 fattime2timespec(dep->de_CDate, dep->de_CTime, dep->de_CHun, 347 0, &vap->va_birthtime); 348 } else { 349 vap->va_atime = vap->va_mtime; 350 vap->va_birthtime.tv_sec = -1; 351 vap->va_birthtime.tv_nsec = 0; 352 } 353 vap->va_flags = 0; 354 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 355 vap->va_flags |= SF_ARCHIVED; 356 vap->va_gen = 0; 357 vap->va_blocksize = pmp->pm_bpcluster; 358 vap->va_bytes = 359 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 360 vap->va_type = ap->a_vp->v_type; 361 vap->va_filerev = dep->de_modrev; 362 return (0); 363 } 364 365 static int 366 msdosfs_setattr(ap) 367 struct vop_setattr_args /* { 368 struct vnode *a_vp; 369 struct vattr *a_vap; 370 struct ucred *a_cred; 371 struct thread *a_td; 372 } */ *ap; 373 { 374 struct vnode *vp = ap->a_vp; 375 struct denode *dep = VTODE(ap->a_vp); 376 struct msdosfsmount *pmp = dep->de_pmp; 377 struct vattr *vap = ap->a_vap; 378 struct ucred *cred = ap->a_cred; 379 int error = 0; 380 381 #ifdef MSDOSFS_DEBUG 382 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 383 ap->a_vp, vap, cred, ap->a_td); 384 #endif 385 386 /* 387 * Check for unsettable attributes. 388 */ 389 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 390 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 391 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 392 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 393 #ifdef MSDOSFS_DEBUG 394 printf("msdosfs_setattr(): returning EINVAL\n"); 395 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 396 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 397 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 398 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 399 printf(" va_uid %x, va_gid %x\n", 400 vap->va_uid, vap->va_gid); 401 #endif 402 return (EINVAL); 403 } 404 if (vap->va_flags != VNOVAL) { 405 if (vp->v_mount->mnt_flag & MNT_RDONLY) 406 return (EROFS); 407 if (cred->cr_uid != pmp->pm_uid) { 408 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0); 409 if (error) 410 return (error); 411 } 412 /* 413 * We are very inconsistent about handling unsupported 414 * attributes. We ignored the access time and the 415 * read and execute bits. We were strict for the other 416 * attributes. 417 * 418 * Here we are strict, stricter than ufs in not allowing 419 * users to attempt to set SF_SETTABLE bits or anyone to 420 * set unsupported bits. However, we ignore attempts to 421 * set ATTR_ARCHIVE for directories `cp -pr' from a more 422 * sensible filesystem attempts it a lot. 423 */ 424 if (vap->va_flags & SF_SETTABLE) { 425 error = priv_check_cred(cred, PRIV_VFS_SYSFLAGS, 0); 426 if (error) 427 return (error); 428 } 429 if (vap->va_flags & ~SF_ARCHIVED) 430 return EOPNOTSUPP; 431 if (vap->va_flags & SF_ARCHIVED) 432 dep->de_Attributes &= ~ATTR_ARCHIVE; 433 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 434 dep->de_Attributes |= ATTR_ARCHIVE; 435 dep->de_flag |= DE_MODIFIED; 436 } 437 438 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 439 uid_t uid; 440 gid_t gid; 441 442 if (vp->v_mount->mnt_flag & MNT_RDONLY) 443 return (EROFS); 444 uid = vap->va_uid; 445 if (uid == (uid_t)VNOVAL) 446 uid = pmp->pm_uid; 447 gid = vap->va_gid; 448 if (gid == (gid_t)VNOVAL) 449 gid = pmp->pm_gid; 450 if (cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 451 (gid != pmp->pm_gid && !groupmember(gid, cred))) { 452 error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0); 453 if (error) 454 return (error); 455 } 456 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 457 return EINVAL; 458 } 459 460 if (vap->va_size != VNOVAL) { 461 switch (vp->v_type) { 462 case VDIR: 463 return (EISDIR); 464 case VREG: 465 /* 466 * Truncation is only supported for regular files, 467 * Disallow it if the filesystem is read-only. 468 */ 469 if (vp->v_mount->mnt_flag & MNT_RDONLY) 470 return (EROFS); 471 break; 472 default: 473 /* 474 * According to POSIX, the result is unspecified 475 * for file types other than regular files, 476 * directories and shared memory objects. We 477 * don't support any file types except regular 478 * files and directories in this file system, so 479 * this (default) case is unreachable and can do 480 * anything. Keep falling through to detrunc() 481 * for now. 482 */ 483 break; 484 } 485 error = detrunc(dep, vap->va_size, 0, cred, ap->a_td); 486 if (error) 487 return error; 488 } 489 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 490 if (vp->v_mount->mnt_flag & MNT_RDONLY) 491 return (EROFS); 492 if (vap->va_vaflags & VA_UTIMES_NULL) { 493 error = VOP_ACCESS(vp, VADMIN, cred, ap->a_td); 494 if (error) 495 error = VOP_ACCESS(vp, VWRITE, cred, 496 ap->a_td); 497 } else 498 error = VOP_ACCESS(vp, VADMIN, cred, ap->a_td); 499 if (vp->v_type != VDIR) { 500 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 501 vap->va_atime.tv_sec != VNOVAL) { 502 dep->de_flag &= ~DE_ACCESS; 503 timespec2fattime(&vap->va_atime, 0, 504 &dep->de_ADate, NULL, NULL); 505 } 506 if (vap->va_mtime.tv_sec != VNOVAL) { 507 dep->de_flag &= ~DE_UPDATE; 508 timespec2fattime(&vap->va_mtime, 0, 509 &dep->de_MDate, &dep->de_MTime, NULL); 510 } 511 dep->de_Attributes |= ATTR_ARCHIVE; 512 dep->de_flag |= DE_MODIFIED; 513 } 514 } 515 /* 516 * DOS files only have the ability to have their writability 517 * attribute set, so we use the owner write bit to set the readonly 518 * attribute. 519 */ 520 if (vap->va_mode != (mode_t)VNOVAL) { 521 if (vp->v_mount->mnt_flag & MNT_RDONLY) 522 return (EROFS); 523 if (cred->cr_uid != pmp->pm_uid) { 524 error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0); 525 if (error) 526 return (error); 527 } 528 if (vp->v_type != VDIR) { 529 /* We ignore the read and execute bits. */ 530 if (vap->va_mode & VWRITE) 531 dep->de_Attributes &= ~ATTR_READONLY; 532 else 533 dep->de_Attributes |= ATTR_READONLY; 534 dep->de_Attributes |= ATTR_ARCHIVE; 535 dep->de_flag |= DE_MODIFIED; 536 } 537 } 538 return (deupdat(dep, 0)); 539 } 540 541 static int 542 msdosfs_read(ap) 543 struct vop_read_args /* { 544 struct vnode *a_vp; 545 struct uio *a_uio; 546 int a_ioflag; 547 struct ucred *a_cred; 548 } */ *ap; 549 { 550 int error = 0; 551 int blsize; 552 int isadir; 553 int orig_resid; 554 u_int n; 555 u_long diff; 556 u_long on; 557 daddr_t lbn; 558 daddr_t rablock; 559 int rasize; 560 int seqcount; 561 struct buf *bp; 562 struct vnode *vp = ap->a_vp; 563 struct denode *dep = VTODE(vp); 564 struct msdosfsmount *pmp = dep->de_pmp; 565 struct uio *uio = ap->a_uio; 566 567 /* 568 * If they didn't ask for any data, then we are done. 569 */ 570 orig_resid = uio->uio_resid; 571 if (orig_resid == 0) 572 return (0); 573 574 /* 575 * The caller is supposed to ensure that 576 * uio->uio_offset >= 0 and uio->uio_resid >= 0. 577 * We don't need to check for large offsets as in ffs because 578 * dep->de_FileSize <= DOS_FILESIZE_MAX < OFF_MAX, so large 579 * offsets cannot cause overflow even in theory. 580 */ 581 582 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 583 584 isadir = dep->de_Attributes & ATTR_DIRECTORY; 585 do { 586 if (uio->uio_offset >= dep->de_FileSize) 587 break; 588 lbn = de_cluster(pmp, uio->uio_offset); 589 rablock = lbn + 1; 590 blsize = pmp->pm_bpcluster; 591 on = uio->uio_offset & pmp->pm_crbomask; 592 /* 593 * If we are operating on a directory file then be sure to 594 * do i/o with the vnode for the filesystem instead of the 595 * vnode for the directory. 596 */ 597 if (isadir) { 598 /* convert cluster # to block # */ 599 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 600 if (error == E2BIG) { 601 error = EINVAL; 602 break; 603 } else if (error) 604 break; 605 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 606 } else if (de_cn2off(pmp, rablock) >= dep->de_FileSize) { 607 error = bread(vp, lbn, blsize, NOCRED, &bp); 608 } else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 609 error = cluster_read(vp, dep->de_FileSize, lbn, blsize, 610 NOCRED, on + uio->uio_resid, seqcount, &bp); 611 } else if (seqcount > 1) { 612 rasize = blsize; 613 error = breadn(vp, lbn, 614 blsize, &rablock, &rasize, 1, NOCRED, &bp); 615 } else { 616 error = bread(vp, lbn, blsize, NOCRED, &bp); 617 } 618 if (error) { 619 brelse(bp); 620 break; 621 } 622 diff = pmp->pm_bpcluster - on; 623 n = diff > uio->uio_resid ? uio->uio_resid : diff; 624 diff = dep->de_FileSize - uio->uio_offset; 625 if (diff < n) 626 n = diff; 627 diff = blsize - bp->b_resid; 628 if (diff < n) 629 n = diff; 630 error = uiomove(bp->b_data + on, (int) n, uio); 631 brelse(bp); 632 } while (error == 0 && uio->uio_resid > 0 && n != 0); 633 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 634 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 635 dep->de_flag |= DE_ACCESS; 636 return (error); 637 } 638 639 /* 640 * Write data to a file or directory. 641 */ 642 static int 643 msdosfs_write(ap) 644 struct vop_write_args /* { 645 struct vnode *a_vp; 646 struct uio *a_uio; 647 int a_ioflag; 648 struct ucred *a_cred; 649 } */ *ap; 650 { 651 int n; 652 int croffset; 653 int resid; 654 u_long osize; 655 int error = 0; 656 u_long count; 657 int seqcount; 658 daddr_t bn, lastcn; 659 struct buf *bp; 660 int ioflag = ap->a_ioflag; 661 struct uio *uio = ap->a_uio; 662 struct thread *td = uio->uio_td; 663 struct vnode *vp = ap->a_vp; 664 struct vnode *thisvp; 665 struct denode *dep = VTODE(vp); 666 struct msdosfsmount *pmp = dep->de_pmp; 667 struct ucred *cred = ap->a_cred; 668 669 #ifdef MSDOSFS_DEBUG 670 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 671 vp, uio, ioflag, cred); 672 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 673 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 674 #endif 675 676 switch (vp->v_type) { 677 case VREG: 678 if (ioflag & IO_APPEND) 679 uio->uio_offset = dep->de_FileSize; 680 thisvp = vp; 681 break; 682 case VDIR: 683 return EISDIR; 684 default: 685 panic("msdosfs_write(): bad file type"); 686 } 687 688 /* 689 * This is needed (unlike in ffs_write()) because we extend the 690 * file outside of the loop but we don't want to extend the file 691 * for writes of 0 bytes. 692 */ 693 if (uio->uio_resid == 0) 694 return (0); 695 696 /* 697 * The caller is supposed to ensure that 698 * uio->uio_offset >= 0 and uio->uio_resid >= 0. 699 */ 700 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 701 return (EFBIG); 702 703 /* 704 * If they've exceeded their filesize limit, tell them about it. 705 */ 706 if (td != NULL) { 707 PROC_LOCK(td->td_proc); 708 if ((uoff_t)uio->uio_offset + uio->uio_resid > 709 lim_cur(td->td_proc, RLIMIT_FSIZE)) { 710 psignal(td->td_proc, SIGXFSZ); 711 PROC_UNLOCK(td->td_proc); 712 return (EFBIG); 713 } 714 PROC_UNLOCK(td->td_proc); 715 } 716 717 /* 718 * If the offset we are starting the write at is beyond the end of 719 * the file, then they've done a seek. Unix filesystems allow 720 * files with holes in them, DOS doesn't so we must fill the hole 721 * with zeroed blocks. 722 */ 723 if (uio->uio_offset > dep->de_FileSize) { 724 error = deextend(dep, uio->uio_offset, cred); 725 if (error) 726 return (error); 727 } 728 729 /* 730 * Remember some values in case the write fails. 731 */ 732 resid = uio->uio_resid; 733 osize = dep->de_FileSize; 734 735 /* 736 * If we write beyond the end of the file, extend it to its ultimate 737 * size ahead of the time to hopefully get a contiguous area. 738 */ 739 if (uio->uio_offset + resid > osize) { 740 count = de_clcount(pmp, uio->uio_offset + resid) - 741 de_clcount(pmp, osize); 742 error = extendfile(dep, count, NULL, NULL, 0); 743 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 744 goto errexit; 745 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 746 } else 747 lastcn = de_clcount(pmp, osize) - 1; 748 749 seqcount = ioflag >> IO_SEQSHIFT; 750 do { 751 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 752 error = ENOSPC; 753 break; 754 } 755 756 croffset = uio->uio_offset & pmp->pm_crbomask; 757 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 758 if (uio->uio_offset + n > dep->de_FileSize) { 759 dep->de_FileSize = uio->uio_offset + n; 760 /* The object size needs to be set before buffer is allocated */ 761 vnode_pager_setsize(vp, dep->de_FileSize); 762 } 763 764 bn = de_cluster(pmp, uio->uio_offset); 765 if ((uio->uio_offset & pmp->pm_crbomask) == 0 766 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 767 > de_cluster(pmp, uio->uio_offset) 768 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 769 /* 770 * If either the whole cluster gets written, 771 * or we write the cluster from its start beyond EOF, 772 * then no need to read data from disk. 773 */ 774 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0, 0); 775 vfs_bio_clrbuf(bp); 776 /* 777 * Do the bmap now, since pcbmap needs buffers 778 * for the fat table. (see msdosfs_strategy) 779 */ 780 if (bp->b_blkno == bp->b_lblkno) { 781 error = pcbmap(dep, bp->b_lblkno, &bn, 0, 0); 782 if (error) 783 bp->b_blkno = -1; 784 else 785 bp->b_blkno = bn; 786 } 787 if (bp->b_blkno == -1) { 788 brelse(bp); 789 if (!error) 790 error = EIO; /* XXX */ 791 break; 792 } 793 } else { 794 /* 795 * The block we need to write into exists, so read it in. 796 */ 797 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 798 if (error) { 799 brelse(bp); 800 break; 801 } 802 } 803 804 /* 805 * Should these vnode_pager_* functions be done on dir 806 * files? 807 */ 808 809 /* 810 * Copy the data from user space into the buf header. 811 */ 812 error = uiomove(bp->b_data + croffset, n, uio); 813 if (error) { 814 brelse(bp); 815 break; 816 } 817 818 /* Prepare for clustered writes in some else clauses. */ 819 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) 820 bp->b_flags |= B_CLUSTEROK; 821 822 /* 823 * If IO_SYNC, then each buffer is written synchronously. 824 * Otherwise, if we have a severe page deficiency then 825 * write the buffer asynchronously. Otherwise, if on a 826 * cluster boundary then write the buffer asynchronously, 827 * combining it with contiguous clusters if permitted and 828 * possible, since we don't expect more writes into this 829 * buffer soon. Otherwise, do a delayed write because we 830 * expect more writes into this buffer soon. 831 */ 832 if (ioflag & IO_SYNC) 833 (void)bwrite(bp); 834 else if (vm_page_count_severe() || buf_dirty_count_severe()) 835 bawrite(bp); 836 else if (n + croffset == pmp->pm_bpcluster) { 837 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0) 838 cluster_write(vp, bp, dep->de_FileSize, 839 seqcount); 840 else 841 bawrite(bp); 842 } else 843 bdwrite(bp); 844 dep->de_flag |= DE_UPDATE; 845 } while (error == 0 && uio->uio_resid > 0); 846 847 /* 848 * If the write failed and they want us to, truncate the file back 849 * to the size it was before the write was attempted. 850 */ 851 errexit: 852 if (error) { 853 if (ioflag & IO_UNIT) { 854 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 855 uio->uio_offset -= resid - uio->uio_resid; 856 uio->uio_resid = resid; 857 } else { 858 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 859 if (uio->uio_resid != resid) 860 error = 0; 861 } 862 } else if (ioflag & IO_SYNC) 863 error = deupdat(dep, 1); 864 return (error); 865 } 866 867 /* 868 * Flush the blocks of a file to disk. 869 * 870 * This function is worthless for vnodes that represent directories. Maybe we 871 * could just do a sync if they try an fsync on a directory file. 872 */ 873 static int 874 msdosfs_fsync(ap) 875 struct vop_fsync_args /* { 876 struct vnode *a_vp; 877 struct ucred *a_cred; 878 int a_waitfor; 879 struct thread *a_td; 880 } */ *ap; 881 { 882 883 vop_stdfsync(ap); 884 return (deupdat(VTODE(ap->a_vp), ap->a_waitfor == MNT_WAIT)); 885 } 886 887 static int 888 msdosfs_remove(ap) 889 struct vop_remove_args /* { 890 struct vnode *a_dvp; 891 struct vnode *a_vp; 892 struct componentname *a_cnp; 893 } */ *ap; 894 { 895 struct denode *dep = VTODE(ap->a_vp); 896 struct denode *ddep = VTODE(ap->a_dvp); 897 int error; 898 899 if (ap->a_vp->v_type == VDIR) 900 error = EPERM; 901 else 902 error = removede(ddep, dep); 903 #ifdef MSDOSFS_DEBUG 904 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 905 #endif 906 return (error); 907 } 908 909 /* 910 * DOS filesystems don't know what links are. 911 */ 912 static int 913 msdosfs_link(ap) 914 struct vop_link_args /* { 915 struct vnode *a_tdvp; 916 struct vnode *a_vp; 917 struct componentname *a_cnp; 918 } */ *ap; 919 { 920 return (EOPNOTSUPP); 921 } 922 923 /* 924 * Renames on files require moving the denode to a new hash queue since the 925 * denode's location is used to compute which hash queue to put the file 926 * in. Unless it is a rename in place. For example "mv a b". 927 * 928 * What follows is the basic algorithm: 929 * 930 * if (file move) { 931 * if (dest file exists) { 932 * remove dest file 933 * } 934 * if (dest and src in same directory) { 935 * rewrite name in existing directory slot 936 * } else { 937 * write new entry in dest directory 938 * update offset and dirclust in denode 939 * move denode to new hash chain 940 * clear old directory entry 941 * } 942 * } else { 943 * directory move 944 * if (dest directory exists) { 945 * if (dest is not empty) { 946 * return ENOTEMPTY 947 * } 948 * remove dest directory 949 * } 950 * if (dest and src in same directory) { 951 * rewrite name in existing entry 952 * } else { 953 * be sure dest is not a child of src directory 954 * write entry in dest directory 955 * update "." and ".." in moved directory 956 * clear old directory entry for moved directory 957 * } 958 * } 959 * 960 * On entry: 961 * source's parent directory is unlocked 962 * source file or directory is unlocked 963 * destination's parent directory is locked 964 * destination file or directory is locked if it exists 965 * 966 * On exit: 967 * all denodes should be released 968 */ 969 static int 970 msdosfs_rename(ap) 971 struct vop_rename_args /* { 972 struct vnode *a_fdvp; 973 struct vnode *a_fvp; 974 struct componentname *a_fcnp; 975 struct vnode *a_tdvp; 976 struct vnode *a_tvp; 977 struct componentname *a_tcnp; 978 } */ *ap; 979 { 980 struct vnode *tdvp = ap->a_tdvp; 981 struct vnode *fvp = ap->a_fvp; 982 struct vnode *fdvp = ap->a_fdvp; 983 struct vnode *tvp = ap->a_tvp; 984 struct componentname *tcnp = ap->a_tcnp; 985 struct componentname *fcnp = ap->a_fcnp; 986 struct denode *ip, *xp, *dp, *zp; 987 u_char toname[11], oldname[11]; 988 u_long from_diroffset, to_diroffset; 989 u_char to_count; 990 int doingdirectory = 0, newparent = 0; 991 int error; 992 u_long cn; 993 daddr_t bn; 994 struct denode *fddep; /* from file's parent directory */ 995 struct msdosfsmount *pmp; 996 struct direntry *dotdotp; 997 struct buf *bp; 998 999 fddep = VTODE(ap->a_fdvp); 1000 pmp = fddep->de_pmp; 1001 1002 pmp = VFSTOMSDOSFS(fdvp->v_mount); 1003 1004 #ifdef DIAGNOSTIC 1005 if ((tcnp->cn_flags & HASBUF) == 0 || 1006 (fcnp->cn_flags & HASBUF) == 0) 1007 panic("msdosfs_rename: no name"); 1008 #endif 1009 /* 1010 * Check for cross-device rename. 1011 */ 1012 if (fvp->v_mount != tdvp->v_mount || 1013 (tvp && fvp->v_mount != tvp->v_mount)) { 1014 error = EXDEV; 1015 abortit: 1016 if (tdvp == tvp) 1017 vrele(tdvp); 1018 else 1019 vput(tdvp); 1020 if (tvp) 1021 vput(tvp); 1022 vrele(fdvp); 1023 vrele(fvp); 1024 return (error); 1025 } 1026 1027 /* 1028 * If source and dest are the same, do nothing. 1029 */ 1030 if (tvp == fvp) { 1031 error = 0; 1032 goto abortit; 1033 } 1034 1035 error = vn_lock(fvp, LK_EXCLUSIVE); 1036 if (error) 1037 goto abortit; 1038 dp = VTODE(fdvp); 1039 ip = VTODE(fvp); 1040 1041 /* 1042 * Be sure we are not renaming ".", "..", or an alias of ".". This 1043 * leads to a crippled directory tree. It's pretty tough to do a 1044 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1045 * doesn't work if the ".." entry is missing. 1046 */ 1047 if (ip->de_Attributes & ATTR_DIRECTORY) { 1048 /* 1049 * Avoid ".", "..", and aliases of "." for obvious reasons. 1050 */ 1051 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1052 dp == ip || 1053 (fcnp->cn_flags & ISDOTDOT) || 1054 (tcnp->cn_flags & ISDOTDOT) || 1055 (ip->de_flag & DE_RENAME)) { 1056 VOP_UNLOCK(fvp, 0); 1057 error = EINVAL; 1058 goto abortit; 1059 } 1060 ip->de_flag |= DE_RENAME; 1061 doingdirectory++; 1062 } 1063 1064 /* 1065 * When the target exists, both the directory 1066 * and target vnodes are returned locked. 1067 */ 1068 dp = VTODE(tdvp); 1069 xp = tvp ? VTODE(tvp) : NULL; 1070 /* 1071 * Remember direntry place to use for destination 1072 */ 1073 to_diroffset = dp->de_fndoffset; 1074 to_count = dp->de_fndcnt; 1075 1076 /* 1077 * If ".." must be changed (ie the directory gets a new 1078 * parent) then the source directory must not be in the 1079 * directory heirarchy above the target, as this would 1080 * orphan everything below the source directory. Also 1081 * the user must have write permission in the source so 1082 * as to be able to change "..". We must repeat the call 1083 * to namei, as the parent directory is unlocked by the 1084 * call to doscheckpath(). 1085 */ 1086 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); 1087 VOP_UNLOCK(fvp, 0); 1088 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1089 newparent = 1; 1090 if (doingdirectory && newparent) { 1091 if (error) /* write access check above */ 1092 goto bad; 1093 if (xp != NULL) 1094 vput(tvp); 1095 /* 1096 * doscheckpath() vput()'s dp, 1097 * so we have to do a relookup afterwards 1098 */ 1099 error = doscheckpath(ip, dp); 1100 if (error) 1101 goto out; 1102 if ((tcnp->cn_flags & SAVESTART) == 0) 1103 panic("msdosfs_rename: lost to startdir"); 1104 error = relookup(tdvp, &tvp, tcnp); 1105 if (error) 1106 goto out; 1107 dp = VTODE(tdvp); 1108 xp = tvp ? VTODE(tvp) : NULL; 1109 } 1110 1111 if (xp != NULL) { 1112 /* 1113 * Target must be empty if a directory and have no links 1114 * to it. Also, ensure source and target are compatible 1115 * (both directories, or both not directories). 1116 */ 1117 if (xp->de_Attributes & ATTR_DIRECTORY) { 1118 if (!dosdirempty(xp)) { 1119 error = ENOTEMPTY; 1120 goto bad; 1121 } 1122 if (!doingdirectory) { 1123 error = ENOTDIR; 1124 goto bad; 1125 } 1126 cache_purge(tdvp); 1127 } else if (doingdirectory) { 1128 error = EISDIR; 1129 goto bad; 1130 } 1131 error = removede(dp, xp); 1132 if (error) 1133 goto bad; 1134 vput(tvp); 1135 xp = NULL; 1136 } 1137 1138 /* 1139 * Convert the filename in tcnp into a dos filename. We copy this 1140 * into the denode and directory entry for the destination 1141 * file/directory. 1142 */ 1143 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1144 if (error) 1145 goto abortit; 1146 1147 /* 1148 * Since from wasn't locked at various places above, 1149 * have to do a relookup here. 1150 */ 1151 fcnp->cn_flags &= ~MODMASK; 1152 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1153 if ((fcnp->cn_flags & SAVESTART) == 0) 1154 panic("msdosfs_rename: lost from startdir"); 1155 if (!newparent) 1156 VOP_UNLOCK(tdvp, 0); 1157 if (relookup(fdvp, &fvp, fcnp) == 0) 1158 vrele(fdvp); 1159 if (fvp == NULL) { 1160 /* 1161 * From name has disappeared. 1162 */ 1163 if (doingdirectory) 1164 panic("rename: lost dir entry"); 1165 if (newparent) 1166 VOP_UNLOCK(tdvp, 0); 1167 vrele(tdvp); 1168 vrele(ap->a_fvp); 1169 return 0; 1170 } 1171 xp = VTODE(fvp); 1172 zp = VTODE(fdvp); 1173 from_diroffset = zp->de_fndoffset; 1174 1175 /* 1176 * Ensure that the directory entry still exists and has not 1177 * changed till now. If the source is a file the entry may 1178 * have been unlinked or renamed. In either case there is 1179 * no further work to be done. If the source is a directory 1180 * then it cannot have been rmdir'ed or renamed; this is 1181 * prohibited by the DE_RENAME flag. 1182 */ 1183 if (xp != ip) { 1184 if (doingdirectory) 1185 panic("rename: lost dir entry"); 1186 VOP_UNLOCK(fvp, 0); 1187 if (newparent) 1188 VOP_UNLOCK(fdvp, 0); 1189 vrele(ap->a_fvp); 1190 xp = NULL; 1191 } else { 1192 vrele(fvp); 1193 xp = NULL; 1194 1195 /* 1196 * First write a new entry in the destination 1197 * directory and mark the entry in the source directory 1198 * as deleted. Then move the denode to the correct hash 1199 * chain for its new location in the filesystem. And, if 1200 * we moved a directory, then update its .. entry to point 1201 * to the new parent directory. 1202 */ 1203 bcopy(ip->de_Name, oldname, 11); 1204 bcopy(toname, ip->de_Name, 11); /* update denode */ 1205 dp->de_fndoffset = to_diroffset; 1206 dp->de_fndcnt = to_count; 1207 error = createde(ip, dp, (struct denode **)0, tcnp); 1208 if (error) { 1209 bcopy(oldname, ip->de_Name, 11); 1210 if (newparent) 1211 VOP_UNLOCK(fdvp, 0); 1212 VOP_UNLOCK(fvp, 0); 1213 goto bad; 1214 } 1215 ip->de_refcnt++; 1216 zp->de_fndoffset = from_diroffset; 1217 error = removede(zp, ip); 1218 if (error) { 1219 /* XXX should downgrade to ro here, fs is corrupt */ 1220 if (newparent) 1221 VOP_UNLOCK(fdvp, 0); 1222 VOP_UNLOCK(fvp, 0); 1223 goto bad; 1224 } 1225 if (!doingdirectory) { 1226 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1227 &ip->de_dirclust, 0); 1228 if (error) { 1229 /* XXX should downgrade to ro here, fs is corrupt */ 1230 if (newparent) 1231 VOP_UNLOCK(fdvp, 0); 1232 VOP_UNLOCK(fvp, 0); 1233 goto bad; 1234 } 1235 if (ip->de_dirclust == MSDOSFSROOT) 1236 ip->de_diroffset = to_diroffset; 1237 else 1238 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1239 } 1240 reinsert(ip); 1241 if (newparent) 1242 VOP_UNLOCK(fdvp, 0); 1243 } 1244 1245 /* 1246 * If we moved a directory to a new parent directory, then we must 1247 * fixup the ".." entry in the moved directory. 1248 */ 1249 if (doingdirectory && newparent) { 1250 cn = ip->de_StartCluster; 1251 if (cn == MSDOSFSROOT) { 1252 /* this should never happen */ 1253 panic("msdosfs_rename(): updating .. in root directory?"); 1254 } else 1255 bn = cntobn(pmp, cn); 1256 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1257 NOCRED, &bp); 1258 if (error) { 1259 /* XXX should downgrade to ro here, fs is corrupt */ 1260 brelse(bp); 1261 VOP_UNLOCK(fvp, 0); 1262 goto bad; 1263 } 1264 dotdotp = (struct direntry *)bp->b_data + 1; 1265 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1266 if (FAT32(pmp)) 1267 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1268 if (fvp->v_mount->mnt_flag & MNT_ASYNC) 1269 bdwrite(bp); 1270 else if ((error = bwrite(bp)) != 0) { 1271 /* XXX should downgrade to ro here, fs is corrupt */ 1272 VOP_UNLOCK(fvp, 0); 1273 goto bad; 1274 } 1275 } 1276 1277 VOP_UNLOCK(fvp, 0); 1278 bad: 1279 if (xp) 1280 vput(tvp); 1281 vput(tdvp); 1282 out: 1283 ip->de_flag &= ~DE_RENAME; 1284 vrele(fdvp); 1285 vrele(fvp); 1286 return (error); 1287 1288 } 1289 1290 static struct { 1291 struct direntry dot; 1292 struct direntry dotdot; 1293 } dosdirtemplate = { 1294 { ". ", " ", /* the . entry */ 1295 ATTR_DIRECTORY, /* file attribute */ 1296 0, /* reserved */ 1297 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1298 { 0, 0 }, /* access date */ 1299 { 0, 0 }, /* high bits of start cluster */ 1300 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1301 { 0, 0 }, /* startcluster */ 1302 { 0, 0, 0, 0 } /* filesize */ 1303 }, 1304 { ".. ", " ", /* the .. entry */ 1305 ATTR_DIRECTORY, /* file attribute */ 1306 0, /* reserved */ 1307 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1308 { 0, 0 }, /* access date */ 1309 { 0, 0 }, /* high bits of start cluster */ 1310 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1311 { 0, 0 }, /* startcluster */ 1312 { 0, 0, 0, 0 } /* filesize */ 1313 } 1314 }; 1315 1316 static int 1317 msdosfs_mkdir(ap) 1318 struct vop_mkdir_args /* { 1319 struct vnode *a_dvp; 1320 struct vnode **a_vpp; 1321 struvt componentname *a_cnp; 1322 struct vattr *a_vap; 1323 } */ *ap; 1324 { 1325 struct componentname *cnp = ap->a_cnp; 1326 struct denode *dep; 1327 struct denode *pdep = VTODE(ap->a_dvp); 1328 struct direntry *denp; 1329 struct msdosfsmount *pmp = pdep->de_pmp; 1330 struct buf *bp; 1331 u_long newcluster, pcl; 1332 int bn; 1333 int error; 1334 struct denode ndirent; 1335 struct timespec ts; 1336 1337 /* 1338 * If this is the root directory and there is no space left we 1339 * can't do anything. This is because the root directory can not 1340 * change size. 1341 */ 1342 if (pdep->de_StartCluster == MSDOSFSROOT 1343 && pdep->de_fndoffset >= pdep->de_FileSize) { 1344 error = ENOSPC; 1345 goto bad2; 1346 } 1347 1348 /* 1349 * Allocate a cluster to hold the about to be created directory. 1350 */ 1351 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1352 if (error) 1353 goto bad2; 1354 1355 bzero(&ndirent, sizeof(ndirent)); 1356 ndirent.de_pmp = pmp; 1357 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1358 getnanotime(&ts); 1359 DETIMES(&ndirent, &ts, &ts, &ts); 1360 1361 /* 1362 * Now fill the cluster with the "." and ".." entries. And write 1363 * the cluster to disk. This way it is there for the parent 1364 * directory to be pointing at if there were a crash. 1365 */ 1366 bn = cntobn(pmp, newcluster); 1367 /* always succeeds */ 1368 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0, 0); 1369 bzero(bp->b_data, pmp->pm_bpcluster); 1370 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1371 denp = (struct direntry *)bp->b_data; 1372 putushort(denp[0].deStartCluster, newcluster); 1373 putushort(denp[0].deCDate, ndirent.de_CDate); 1374 putushort(denp[0].deCTime, ndirent.de_CTime); 1375 denp[0].deCHundredth = ndirent.de_CHun; 1376 putushort(denp[0].deADate, ndirent.de_ADate); 1377 putushort(denp[0].deMDate, ndirent.de_MDate); 1378 putushort(denp[0].deMTime, ndirent.de_MTime); 1379 pcl = pdep->de_StartCluster; 1380 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1381 pcl = 0; 1382 putushort(denp[1].deStartCluster, pcl); 1383 putushort(denp[1].deCDate, ndirent.de_CDate); 1384 putushort(denp[1].deCTime, ndirent.de_CTime); 1385 denp[1].deCHundredth = ndirent.de_CHun; 1386 putushort(denp[1].deADate, ndirent.de_ADate); 1387 putushort(denp[1].deMDate, ndirent.de_MDate); 1388 putushort(denp[1].deMTime, ndirent.de_MTime); 1389 if (FAT32(pmp)) { 1390 putushort(denp[0].deHighClust, newcluster >> 16); 1391 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1392 } 1393 1394 if (ap->a_dvp->v_mount->mnt_flag & MNT_ASYNC) 1395 bdwrite(bp); 1396 else if ((error = bwrite(bp)) != 0) 1397 goto bad; 1398 1399 /* 1400 * Now build up a directory entry pointing to the newly allocated 1401 * cluster. This will be written to an empty slot in the parent 1402 * directory. 1403 */ 1404 #ifdef DIAGNOSTIC 1405 if ((cnp->cn_flags & HASBUF) == 0) 1406 panic("msdosfs_mkdir: no name"); 1407 #endif 1408 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1409 if (error) 1410 goto bad; 1411 1412 ndirent.de_Attributes = ATTR_DIRECTORY; 1413 ndirent.de_LowerCase = 0; 1414 ndirent.de_StartCluster = newcluster; 1415 ndirent.de_FileSize = 0; 1416 ndirent.de_dev = pdep->de_dev; 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 VOP_UNLOCK(dvp, 0); 1477 /* 1478 * Truncate the directory that is being deleted. 1479 */ 1480 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, td); 1481 cache_purge(vp); 1482 1483 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1484 out: 1485 return (error); 1486 } 1487 1488 /* 1489 * DOS filesystems don't know what symlinks are. 1490 */ 1491 static int 1492 msdosfs_symlink(ap) 1493 struct vop_symlink_args /* { 1494 struct vnode *a_dvp; 1495 struct vnode **a_vpp; 1496 struct componentname *a_cnp; 1497 struct vattr *a_vap; 1498 char *a_target; 1499 } */ *ap; 1500 { 1501 return (EOPNOTSUPP); 1502 } 1503 1504 static int 1505 msdosfs_readdir(ap) 1506 struct vop_readdir_args /* { 1507 struct vnode *a_vp; 1508 struct uio *a_uio; 1509 struct ucred *a_cred; 1510 int *a_eofflag; 1511 int *a_ncookies; 1512 u_long **a_cookies; 1513 } */ *ap; 1514 { 1515 struct mbnambuf nb; 1516 int error = 0; 1517 int diff; 1518 long n; 1519 int blsize; 1520 long on; 1521 u_long cn; 1522 uint64_t fileno; 1523 u_long dirsperblk; 1524 long bias = 0; 1525 daddr_t bn, lbn; 1526 struct buf *bp; 1527 struct denode *dep = VTODE(ap->a_vp); 1528 struct msdosfsmount *pmp = dep->de_pmp; 1529 struct direntry *dentp; 1530 struct dirent dirbuf; 1531 struct uio *uio = ap->a_uio; 1532 u_long *cookies = NULL; 1533 int ncookies = 0; 1534 off_t offset, off; 1535 int chksum = -1; 1536 1537 #ifdef MSDOSFS_DEBUG 1538 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1539 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1540 #endif 1541 1542 /* 1543 * msdosfs_readdir() won't operate properly on regular files since 1544 * it does i/o only with the the filesystem vnode, and hence can 1545 * retrieve the wrong block from the buffer cache for a plain file. 1546 * So, fail attempts to readdir() on a plain file. 1547 */ 1548 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1549 return (ENOTDIR); 1550 1551 /* 1552 * To be safe, initialize dirbuf 1553 */ 1554 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1555 1556 /* 1557 * If the user buffer is smaller than the size of one dos directory 1558 * entry or the file offset is not a multiple of the size of a 1559 * directory entry, then we fail the read. 1560 */ 1561 off = offset = uio->uio_offset; 1562 if (uio->uio_resid < sizeof(struct direntry) || 1563 (offset & (sizeof(struct direntry) - 1))) 1564 return (EINVAL); 1565 1566 if (ap->a_ncookies) { 1567 ncookies = uio->uio_resid / 16; 1568 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1569 M_WAITOK); 1570 *ap->a_cookies = cookies; 1571 *ap->a_ncookies = ncookies; 1572 } 1573 1574 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1575 1576 /* 1577 * If they are reading from the root directory then, we simulate 1578 * the . and .. entries since these don't exist in the root 1579 * directory. We also set the offset bias to make up for having to 1580 * simulate these entries. By this I mean that at file offset 64 we 1581 * read the first entry in the root directory that lives on disk. 1582 */ 1583 if (dep->de_StartCluster == MSDOSFSROOT 1584 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1585 #if 0 1586 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1587 offset); 1588 #endif 1589 bias = 2 * sizeof(struct direntry); 1590 if (offset < bias) { 1591 for (n = (int)offset / sizeof(struct direntry); 1592 n < 2; n++) { 1593 if (FAT32(pmp)) 1594 fileno = (uint64_t)cntobn(pmp, 1595 pmp->pm_rootdirblk) 1596 * dirsperblk; 1597 else 1598 fileno = 1; 1599 if (pmp->pm_flags & MSDOSFS_LARGEFS) { 1600 dirbuf.d_fileno = 1601 msdosfs_fileno_map(pmp->pm_mountp, 1602 fileno); 1603 } else { 1604 1605 dirbuf.d_fileno = (uint32_t)fileno; 1606 } 1607 dirbuf.d_type = DT_DIR; 1608 switch (n) { 1609 case 0: 1610 dirbuf.d_namlen = 1; 1611 strcpy(dirbuf.d_name, "."); 1612 break; 1613 case 1: 1614 dirbuf.d_namlen = 2; 1615 strcpy(dirbuf.d_name, ".."); 1616 break; 1617 } 1618 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1619 if (uio->uio_resid < dirbuf.d_reclen) 1620 goto out; 1621 error = uiomove(&dirbuf, dirbuf.d_reclen, uio); 1622 if (error) 1623 goto out; 1624 offset += sizeof(struct direntry); 1625 off = offset; 1626 if (cookies) { 1627 *cookies++ = offset; 1628 if (--ncookies <= 0) 1629 goto out; 1630 } 1631 } 1632 } 1633 } 1634 1635 mbnambuf_init(&nb); 1636 off = offset; 1637 while (uio->uio_resid > 0) { 1638 lbn = de_cluster(pmp, offset - bias); 1639 on = (offset - bias) & pmp->pm_crbomask; 1640 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1641 diff = dep->de_FileSize - (offset - bias); 1642 if (diff <= 0) 1643 break; 1644 n = min(n, diff); 1645 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1646 if (error) 1647 break; 1648 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1649 if (error) { 1650 brelse(bp); 1651 return (error); 1652 } 1653 n = min(n, blsize - bp->b_resid); 1654 if (n == 0) { 1655 brelse(bp); 1656 return (EIO); 1657 } 1658 1659 /* 1660 * Convert from dos directory entries to fs-independent 1661 * directory entries. 1662 */ 1663 for (dentp = (struct direntry *)(bp->b_data + on); 1664 (char *)dentp < bp->b_data + on + n; 1665 dentp++, offset += sizeof(struct direntry)) { 1666 #if 0 1667 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1668 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1669 #endif 1670 /* 1671 * If this is an unused entry, we can stop. 1672 */ 1673 if (dentp->deName[0] == SLOT_EMPTY) { 1674 brelse(bp); 1675 goto out; 1676 } 1677 /* 1678 * Skip deleted entries. 1679 */ 1680 if (dentp->deName[0] == SLOT_DELETED) { 1681 chksum = -1; 1682 mbnambuf_init(&nb); 1683 continue; 1684 } 1685 1686 /* 1687 * Handle Win95 long directory entries 1688 */ 1689 if (dentp->deAttributes == ATTR_WIN95) { 1690 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1691 continue; 1692 chksum = win2unixfn(&nb, 1693 (struct winentry *)dentp, chksum, pmp); 1694 continue; 1695 } 1696 1697 /* 1698 * Skip volume labels 1699 */ 1700 if (dentp->deAttributes & ATTR_VOLUME) { 1701 chksum = -1; 1702 mbnambuf_init(&nb); 1703 continue; 1704 } 1705 /* 1706 * This computation of d_fileno must match 1707 * the computation of va_fileid in 1708 * msdosfs_getattr. 1709 */ 1710 if (dentp->deAttributes & ATTR_DIRECTORY) { 1711 fileno = getushort(dentp->deStartCluster); 1712 if (FAT32(pmp)) 1713 fileno |= getushort(dentp->deHighClust) << 16; 1714 /* if this is the root directory */ 1715 if (fileno == MSDOSFSROOT) 1716 if (FAT32(pmp)) 1717 fileno = (uint64_t)cntobn(pmp, 1718 pmp->pm_rootdirblk) 1719 * dirsperblk; 1720 else 1721 fileno = 1; 1722 else 1723 fileno = (uint64_t)cntobn(pmp, fileno) * 1724 dirsperblk; 1725 dirbuf.d_type = DT_DIR; 1726 } else { 1727 fileno = (uoff_t)offset / 1728 sizeof(struct direntry); 1729 dirbuf.d_type = DT_REG; 1730 } 1731 if (pmp->pm_flags & MSDOSFS_LARGEFS) { 1732 dirbuf.d_fileno = 1733 msdosfs_fileno_map(pmp->pm_mountp, fileno); 1734 } else 1735 dirbuf.d_fileno = (uint32_t)fileno; 1736 1737 if (chksum != winChksum(dentp)) { 1738 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1739 (u_char *)dirbuf.d_name, 1740 dentp->deLowerCase | 1741 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1742 (LCASE_BASE | LCASE_EXT) : 0), 1743 pmp); 1744 mbnambuf_init(&nb); 1745 } else 1746 mbnambuf_flush(&nb, &dirbuf); 1747 chksum = -1; 1748 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1749 if (uio->uio_resid < dirbuf.d_reclen) { 1750 brelse(bp); 1751 goto out; 1752 } 1753 error = uiomove(&dirbuf, dirbuf.d_reclen, uio); 1754 if (error) { 1755 brelse(bp); 1756 goto out; 1757 } 1758 if (cookies) { 1759 *cookies++ = offset + sizeof(struct direntry); 1760 if (--ncookies <= 0) { 1761 brelse(bp); 1762 goto out; 1763 } 1764 } 1765 off = offset + sizeof(struct direntry); 1766 } 1767 brelse(bp); 1768 } 1769 out: 1770 /* Subtract unused cookies */ 1771 if (ap->a_ncookies) 1772 *ap->a_ncookies -= ncookies; 1773 1774 uio->uio_offset = off; 1775 1776 /* 1777 * Set the eofflag (NFS uses it) 1778 */ 1779 if (ap->a_eofflag) { 1780 if (dep->de_FileSize - (offset - bias) <= 0) 1781 *ap->a_eofflag = 1; 1782 else 1783 *ap->a_eofflag = 0; 1784 } 1785 return (error); 1786 } 1787 1788 /*- 1789 * a_vp - pointer to the file's vnode 1790 * a_bn - logical block number within the file (cluster number for us) 1791 * a_bop - where to return the bufobj of the special file containing the fs 1792 * a_bnp - where to return the "physical" block number corresponding to a_bn 1793 * (relative to the special file; units are blocks of size DEV_BSIZE) 1794 * a_runp - where to return the "run past" a_bn. This is the count of logical 1795 * blocks whose physical blocks (together with a_bn's physical block) 1796 * are contiguous. 1797 * a_runb - where to return the "run before" a_bn. 1798 */ 1799 static int 1800 msdosfs_bmap(ap) 1801 struct vop_bmap_args /* { 1802 struct vnode *a_vp; 1803 daddr_t a_bn; 1804 struct bufobj **a_bop; 1805 daddr_t *a_bnp; 1806 int *a_runp; 1807 int *a_runb; 1808 } */ *ap; 1809 { 1810 struct denode *dep; 1811 struct mount *mp; 1812 struct msdosfsmount *pmp; 1813 struct vnode *vp; 1814 daddr_t runbn; 1815 u_long cn; 1816 int bnpercn, error, maxio, maxrun, run; 1817 1818 vp = ap->a_vp; 1819 dep = VTODE(vp); 1820 pmp = dep->de_pmp; 1821 if (ap->a_bop != NULL) 1822 *ap->a_bop = &pmp->pm_devvp->v_bufobj; 1823 if (ap->a_bnp == NULL) 1824 return (0); 1825 if (ap->a_runp != NULL) 1826 *ap->a_runp = 0; 1827 if (ap->a_runb != NULL) 1828 *ap->a_runb = 0; 1829 cn = ap->a_bn; 1830 if (cn != ap->a_bn) 1831 return (EFBIG); 1832 error = pcbmap(dep, cn, ap->a_bnp, NULL, NULL); 1833 if (error != 0 || (ap->a_runp == NULL && ap->a_runb == NULL)) 1834 return (error); 1835 1836 mp = vp->v_mount; 1837 maxio = mp->mnt_iosize_max / mp->mnt_stat.f_iosize; 1838 bnpercn = de_cn2bn(pmp, 1); 1839 if (ap->a_runp != NULL) { 1840 maxrun = ulmin(maxio - 1, pmp->pm_maxcluster - cn); 1841 for (run = 1; run <= maxrun; run++) { 1842 if (pcbmap(dep, cn + run, &runbn, NULL, NULL) != 0 || 1843 runbn != *ap->a_bnp + run * bnpercn) 1844 break; 1845 } 1846 *ap->a_runp = run - 1; 1847 } 1848 if (ap->a_runb != NULL) { 1849 maxrun = ulmin(maxio - 1, cn); 1850 for (run = 1; run < maxrun; run++) { 1851 if (pcbmap(dep, cn - run, &runbn, NULL, NULL) != 0 || 1852 runbn != *ap->a_bnp - run * bnpercn) 1853 break; 1854 } 1855 *ap->a_runb = run - 1; 1856 } 1857 return (0); 1858 } 1859 1860 static int 1861 msdosfs_strategy(ap) 1862 struct vop_strategy_args /* { 1863 struct vnode *a_vp; 1864 struct buf *a_bp; 1865 } */ *ap; 1866 { 1867 struct buf *bp = ap->a_bp; 1868 struct denode *dep = VTODE(ap->a_vp); 1869 struct bufobj *bo; 1870 int error = 0; 1871 daddr_t blkno; 1872 1873 /* 1874 * If we don't already know the filesystem relative block number 1875 * then get it using pcbmap(). If pcbmap() returns the block 1876 * number as -1 then we've got a hole in the file. DOS filesystems 1877 * don't allow files with holes, so we shouldn't ever see this. 1878 */ 1879 if (bp->b_blkno == bp->b_lblkno) { 1880 error = pcbmap(dep, bp->b_lblkno, &blkno, 0, 0); 1881 bp->b_blkno = blkno; 1882 if (error) { 1883 bp->b_error = error; 1884 bp->b_ioflags |= BIO_ERROR; 1885 bufdone(bp); 1886 return (error); 1887 } 1888 if ((long)bp->b_blkno == -1) 1889 vfs_bio_clrbuf(bp); 1890 } 1891 if (bp->b_blkno == -1) { 1892 bufdone(bp); 1893 return (0); 1894 } 1895 /* 1896 * Read/write the block from/to the disk that contains the desired 1897 * file block. 1898 */ 1899 bp->b_iooffset = dbtob(bp->b_blkno); 1900 bo = dep->de_pmp->pm_bo; 1901 BO_STRATEGY(bo, bp); 1902 return (0); 1903 } 1904 1905 static int 1906 msdosfs_print(ap) 1907 struct vop_print_args /* { 1908 struct vnode *vp; 1909 } */ *ap; 1910 { 1911 struct denode *dep = VTODE(ap->a_vp); 1912 1913 printf("\tstartcluster %lu, dircluster %lu, diroffset %lu, ", 1914 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1915 printf("on dev %s\n", devtoname(dep->de_dev)); 1916 return (0); 1917 } 1918 1919 static int 1920 msdosfs_pathconf(ap) 1921 struct vop_pathconf_args /* { 1922 struct vnode *a_vp; 1923 int a_name; 1924 int *a_retval; 1925 } */ *ap; 1926 { 1927 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1928 1929 switch (ap->a_name) { 1930 case _PC_LINK_MAX: 1931 *ap->a_retval = 1; 1932 return (0); 1933 case _PC_NAME_MAX: 1934 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1935 return (0); 1936 case _PC_PATH_MAX: 1937 *ap->a_retval = PATH_MAX; 1938 return (0); 1939 case _PC_CHOWN_RESTRICTED: 1940 *ap->a_retval = 1; 1941 return (0); 1942 case _PC_NO_TRUNC: 1943 *ap->a_retval = 0; 1944 return (0); 1945 default: 1946 return (EINVAL); 1947 } 1948 /* NOTREACHED */ 1949 } 1950 1951 static int 1952 msdosfs_advlock(ap) 1953 struct vop_advlock_args /* { 1954 struct vnode *a_vp; 1955 u_char a_id; 1956 int a_op; 1957 struct flock *a_fl; 1958 int a_flags; 1959 } */ *ap; 1960 { 1961 struct denode *dep = VTODE(ap->a_vp); 1962 1963 return (lf_advlock(ap, &dep->de_lockf, dep->de_FileSize)); 1964 } 1965 1966 static int 1967 msdosfs_advlockasync(ap) 1968 struct vop_advlockasync_args /* { 1969 struct vnode *a_vp; 1970 u_char a_id; 1971 int a_op; 1972 struct flock *a_fl; 1973 int a_flags; 1974 struct task *a_task; 1975 } */ *ap; 1976 { 1977 struct denode *dep = VTODE(ap->a_vp); 1978 1979 return (lf_advlockasync(ap, &dep->de_lockf, dep->de_FileSize)); 1980 } 1981 1982 static int 1983 msdosfs_vptofh(ap) 1984 struct vop_vptofh_args /* { 1985 struct vnode *a_vp; 1986 struct fid *a_fhp; 1987 } */ *ap; 1988 { 1989 struct denode *dep; 1990 struct defid *defhp; 1991 1992 dep = VTODE(ap->a_vp); 1993 defhp = (struct defid *)ap->a_fhp; 1994 defhp->defid_len = sizeof(struct defid); 1995 defhp->defid_dirclust = dep->de_dirclust; 1996 defhp->defid_dirofs = dep->de_diroffset; 1997 /* defhp->defid_gen = dep->de_gen; */ 1998 return (0); 1999 } 2000 2001 /* Global vfs data structures for msdosfs */ 2002 struct vop_vector msdosfs_vnodeops = { 2003 .vop_default = &default_vnodeops, 2004 2005 .vop_access = msdosfs_access, 2006 .vop_advlock = msdosfs_advlock, 2007 .vop_advlockasync = msdosfs_advlockasync, 2008 .vop_bmap = msdosfs_bmap, 2009 .vop_cachedlookup = msdosfs_lookup, 2010 .vop_open = msdosfs_open, 2011 .vop_close = msdosfs_close, 2012 .vop_create = msdosfs_create, 2013 .vop_fsync = msdosfs_fsync, 2014 .vop_getattr = msdosfs_getattr, 2015 .vop_inactive = msdosfs_inactive, 2016 .vop_link = msdosfs_link, 2017 .vop_lookup = vfs_cache_lookup, 2018 .vop_mkdir = msdosfs_mkdir, 2019 .vop_mknod = msdosfs_mknod, 2020 .vop_pathconf = msdosfs_pathconf, 2021 .vop_print = msdosfs_print, 2022 .vop_read = msdosfs_read, 2023 .vop_readdir = msdosfs_readdir, 2024 .vop_reclaim = msdosfs_reclaim, 2025 .vop_remove = msdosfs_remove, 2026 .vop_rename = msdosfs_rename, 2027 .vop_rmdir = msdosfs_rmdir, 2028 .vop_setattr = msdosfs_setattr, 2029 .vop_strategy = msdosfs_strategy, 2030 .vop_symlink = msdosfs_symlink, 2031 .vop_write = msdosfs_write, 2032 .vop_vptofh = msdosfs_vptofh, 2033 }; 2034