1 /* $FreeBSD: src/sys/msdosfs/msdosfs_vnops.c,v 1.95.2.4 2003/06/13 15:05:47 trhodes Exp $ */ 2 /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vnops.c,v 1.12 2003/09/23 05:03:52 dillon Exp $ */ 3 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 4 5 /*- 6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 8 * All rights reserved. 9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by TooLs GmbH. 22 * 4. The name of TooLs GmbH may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 /* 37 * Written by Paul Popelka (paulp@uts.amdahl.com) 38 * 39 * You can do anything you want with this software, just don't say you wrote 40 * it, and don't remove this notice. 41 * 42 * This software is provided "as is". 43 * 44 * The author supplies this software to be publicly redistributed on the 45 * understanding that the author is not responsible for the correct 46 * functioning of this software in any circumstances and is not liable for 47 * any damages caused by this software. 48 * 49 * October 1992 50 */ 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 55 #include <sys/kernel.h> 56 #include <sys/stat.h> 57 #include <sys/buf.h> 58 #include <sys/proc.h> 59 #include <sys/namei.h> 60 #include <sys/mount.h> 61 #include <sys/unistd.h> 62 #include <sys/vnode.h> 63 #include <sys/malloc.h> 64 #include <sys/dirent.h> 65 #include <sys/signalvar.h> 66 67 #include <vm/vm.h> 68 #include <vm/vm_extern.h> 69 #include <vm/vm_zone.h> 70 #include <vm/vnode_pager.h> 71 72 #include <sys/buf2.h> 73 74 #include "bpb.h" 75 #include "direntry.h" 76 #include "denode.h" 77 #include "msdosfsmount.h" 78 #include "fat.h" 79 80 #define DOS_FILESIZE_MAX 0xffffffff 81 82 /* 83 * Prototypes for MSDOSFS vnode operations 84 */ 85 static int msdosfs_create (struct vop_create_args *); 86 static int msdosfs_mknod (struct vop_mknod_args *); 87 static int msdosfs_close (struct vop_close_args *); 88 static int msdosfs_access (struct vop_access_args *); 89 static int msdosfs_getattr (struct vop_getattr_args *); 90 static int msdosfs_setattr (struct vop_setattr_args *); 91 static int msdosfs_read (struct vop_read_args *); 92 static int msdosfs_write (struct vop_write_args *); 93 static int msdosfs_fsync (struct vop_fsync_args *); 94 static int msdosfs_remove (struct vop_remove_args *); 95 static int msdosfs_link (struct vop_link_args *); 96 static int msdosfs_rename (struct vop_rename_args *); 97 static int msdosfs_mkdir (struct vop_mkdir_args *); 98 static int msdosfs_rmdir (struct vop_rmdir_args *); 99 static int msdosfs_symlink (struct vop_symlink_args *); 100 static int msdosfs_readdir (struct vop_readdir_args *); 101 static int msdosfs_bmap (struct vop_bmap_args *); 102 static int msdosfs_strategy (struct vop_strategy_args *); 103 static int msdosfs_print (struct vop_print_args *); 104 static int msdosfs_pathconf (struct vop_pathconf_args *ap); 105 static int msdosfs_getpages (struct vop_getpages_args *); 106 static int msdosfs_putpages (struct vop_putpages_args *); 107 108 /* 109 * Some general notes: 110 * 111 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 112 * read/written using the vnode for the filesystem. Blocks that represent 113 * the contents of a file are read/written using the vnode for the file 114 * (including directories when they are read/written as files). This 115 * presents problems for the dos filesystem because data that should be in 116 * an inode (if dos had them) resides in the directory itself. Since we 117 * must update directory entries without the benefit of having the vnode 118 * for the directory we must use the vnode for the filesystem. This means 119 * that when a directory is actually read/written (via read, write, or 120 * readdir, or seek) we must use the vnode for the filesystem instead of 121 * the vnode for the directory as would happen in ufs. This is to insure we 122 * retreive the correct block from the buffer cache since the hash value is 123 * based upon the vnode address and the desired block number. 124 */ 125 126 /* 127 * Create a regular file. On entry the directory to contain the file being 128 * created is locked. We must release before we return. We must also free 129 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 130 * only if the SAVESTART bit in cn_flags is clear on success. 131 */ 132 static int 133 msdosfs_create(ap) 134 struct vop_create_args /* { 135 struct vnode *a_dvp; 136 struct vnode **a_vpp; 137 struct componentname *a_cnp; 138 struct vattr *a_vap; 139 } */ *ap; 140 { 141 struct componentname *cnp = ap->a_cnp; 142 struct denode ndirent; 143 struct denode *dep; 144 struct denode *pdep = VTODE(ap->a_dvp); 145 struct timespec ts; 146 int error; 147 148 #ifdef MSDOSFS_DEBUG 149 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 150 #endif 151 152 /* 153 * If this is the root directory and there is no space left we 154 * can't do anything. This is because the root directory can not 155 * change size. 156 */ 157 if (pdep->de_StartCluster == MSDOSFSROOT 158 && pdep->de_fndoffset >= pdep->de_FileSize) { 159 error = ENOSPC; 160 goto bad; 161 } 162 163 /* 164 * Create a directory entry for the file, then call createde() to 165 * have it installed. NOTE: DOS files are always executable. We 166 * use the absence of the owner write bit to make the file 167 * readonly. 168 */ 169 #ifdef DIAGNOSTIC 170 if ((cnp->cn_flags & CNP_HASBUF) == 0) 171 panic("msdosfs_create: no name"); 172 #endif 173 bzero(&ndirent, sizeof(ndirent)); 174 error = uniqdosname(pdep, cnp, ndirent.de_Name); 175 if (error) 176 goto bad; 177 178 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 179 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 180 ndirent.de_LowerCase = 0; 181 ndirent.de_StartCluster = 0; 182 ndirent.de_FileSize = 0; 183 ndirent.de_dev = pdep->de_dev; 184 ndirent.de_devvp = pdep->de_devvp; 185 ndirent.de_pmp = pdep->de_pmp; 186 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 187 getnanotime(&ts); 188 DETIMES(&ndirent, &ts, &ts, &ts); 189 error = createde(&ndirent, pdep, &dep, cnp); 190 if (error) 191 goto bad; 192 *ap->a_vpp = DETOV(dep); 193 return (0); 194 195 bad: 196 return (error); 197 } 198 199 static int 200 msdosfs_mknod(ap) 201 struct vop_mknod_args /* { 202 struct vnode *a_dvp; 203 struct vnode **a_vpp; 204 struct componentname *a_cnp; 205 struct vattr *a_vap; 206 } */ *ap; 207 { 208 209 switch (ap->a_vap->va_type) { 210 case VDIR: 211 return (msdosfs_mkdir((struct vop_mkdir_args *)ap)); 212 break; 213 214 case VREG: 215 return (msdosfs_create((struct vop_create_args *)ap)); 216 break; 217 218 default: 219 return (EINVAL); 220 } 221 /* NOTREACHED */ 222 } 223 224 static int 225 msdosfs_close(ap) 226 struct vop_close_args /* { 227 struct vnode *a_vp; 228 int a_fflag; 229 struct ucred *a_cred; 230 struct thread *a_td; 231 } */ *ap; 232 { 233 struct vnode *vp = ap->a_vp; 234 struct denode *dep = VTODE(vp); 235 struct timespec ts; 236 237 lwkt_gettoken(&vp->v_interlock); 238 if (vp->v_usecount > 1) { 239 getnanotime(&ts); 240 lwkt_regettoken(&vp->v_interlock); 241 if (vp->v_usecount > 1) { 242 DETIMES(dep, &ts, &ts, &ts); 243 } 244 } 245 lwkt_reltoken(&vp->v_interlock); 246 return 0; 247 } 248 249 static int 250 msdosfs_access(ap) 251 struct vop_access_args /* { 252 struct vnode *a_vp; 253 int a_mode; 254 struct ucred *a_cred; 255 struct thread *a_td; 256 } */ *ap; 257 { 258 struct vnode *vp = ap->a_vp; 259 struct denode *dep = VTODE(ap->a_vp); 260 struct msdosfsmount *pmp = dep->de_pmp; 261 struct ucred *cred = ap->a_cred; 262 mode_t mask, file_mode, mode = ap->a_mode; 263 gid_t *gp; 264 int i; 265 266 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 267 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 268 file_mode &= pmp->pm_mask; 269 270 /* 271 * Disallow write attempts on read-only file systems; 272 * unless the file is a socket, fifo, or a block or 273 * character device resident on the file system. 274 */ 275 if (mode & VWRITE) { 276 switch (vp->v_type) { 277 case VDIR: 278 case VLNK: 279 case VREG: 280 if (vp->v_mount->mnt_flag & MNT_RDONLY) 281 return (EROFS); 282 break; 283 default: 284 break; 285 } 286 } 287 288 /* User id 0 always gets access. */ 289 if (cred->cr_uid == 0) 290 return 0; 291 292 mask = 0; 293 294 /* Otherwise, check the owner. */ 295 if (cred->cr_uid == pmp->pm_uid) { 296 if (mode & VEXEC) 297 mask |= S_IXUSR; 298 if (mode & VREAD) 299 mask |= S_IRUSR; 300 if (mode & VWRITE) 301 mask |= S_IWUSR; 302 return (file_mode & mask) == mask ? 0 : EACCES; 303 } 304 305 /* Otherwise, check the groups. */ 306 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 307 if (pmp->pm_gid == *gp) { 308 if (mode & VEXEC) 309 mask |= S_IXGRP; 310 if (mode & VREAD) 311 mask |= S_IRGRP; 312 if (mode & VWRITE) 313 mask |= S_IWGRP; 314 return (file_mode & mask) == mask ? 0 : EACCES; 315 } 316 317 /* Otherwise, check everyone else. */ 318 if (mode & VEXEC) 319 mask |= S_IXOTH; 320 if (mode & VREAD) 321 mask |= S_IROTH; 322 if (mode & VWRITE) 323 mask |= S_IWOTH; 324 return (file_mode & mask) == mask ? 0 : EACCES; 325 } 326 327 static int 328 msdosfs_getattr(ap) 329 struct vop_getattr_args /* { 330 struct vnode *a_vp; 331 struct vattr *a_vap; 332 struct ucred *a_cred; 333 struct thread *a_td; 334 } */ *ap; 335 { 336 struct denode *dep = VTODE(ap->a_vp); 337 struct msdosfsmount *pmp = dep->de_pmp; 338 struct vattr *vap = ap->a_vap; 339 mode_t mode; 340 struct timespec ts; 341 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 342 u_long fileid; 343 344 getnanotime(&ts); 345 DETIMES(dep, &ts, &ts, &ts); 346 vap->va_fsid = dev2udev(dep->de_dev); 347 /* 348 * The following computation of the fileid must be the same as that 349 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 350 * doesn't work. 351 */ 352 if (dep->de_Attributes & ATTR_DIRECTORY) { 353 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk; 354 if (dep->de_StartCluster == MSDOSFSROOT) 355 fileid = 1; 356 } else { 357 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk; 358 if (dep->de_dirclust == MSDOSFSROOT) 359 fileid = roottobn(pmp, 0) * dirsperblk; 360 fileid += dep->de_diroffset / sizeof(struct direntry); 361 } 362 vap->va_fileid = fileid; 363 if ((dep->de_Attributes & ATTR_READONLY) == 0) 364 mode = S_IRWXU|S_IRWXG|S_IRWXO; 365 else 366 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 367 vap->va_mode = mode & pmp->pm_mask; 368 vap->va_uid = pmp->pm_uid; 369 vap->va_gid = pmp->pm_gid; 370 vap->va_nlink = 1; 371 vap->va_rdev = 0; 372 vap->va_size = dep->de_FileSize; 373 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 374 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 375 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 376 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 377 } else { 378 vap->va_atime = vap->va_mtime; 379 vap->va_ctime = vap->va_mtime; 380 } 381 vap->va_flags = 0; 382 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 383 vap->va_flags |= SF_ARCHIVED; 384 vap->va_gen = 0; 385 vap->va_blocksize = pmp->pm_bpcluster; 386 vap->va_bytes = 387 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 388 vap->va_type = ap->a_vp->v_type; 389 vap->va_filerev = dep->de_modrev; 390 return (0); 391 } 392 393 static int 394 msdosfs_setattr(ap) 395 struct vop_setattr_args /* { 396 struct vnode *a_vp; 397 struct vattr *a_vap; 398 struct ucred *a_cred; 399 struct thread *a_td; 400 } */ *ap; 401 { 402 struct vnode *vp = ap->a_vp; 403 struct denode *dep = VTODE(ap->a_vp); 404 struct msdosfsmount *pmp = dep->de_pmp; 405 struct vattr *vap = ap->a_vap; 406 struct ucred *cred = ap->a_cred; 407 int error = 0; 408 409 #ifdef MSDOSFS_DEBUG 410 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 411 ap->a_vp, vap, cred, ap->a_td); 412 #endif 413 414 /* 415 * Check for unsettable attributes. 416 */ 417 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 418 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 419 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 420 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 421 #ifdef MSDOSFS_DEBUG 422 printf("msdosfs_setattr(): returning EINVAL\n"); 423 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 424 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 425 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 426 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 427 printf(" va_uid %x, va_gid %x\n", 428 vap->va_uid, vap->va_gid); 429 #endif 430 return (EINVAL); 431 } 432 if (vap->va_flags != VNOVAL) { 433 if (vp->v_mount->mnt_flag & MNT_RDONLY) 434 return (EROFS); 435 if (cred->cr_uid != pmp->pm_uid && 436 (error = suser_cred(cred, PRISON_ROOT))) 437 return (error); 438 /* 439 * We are very inconsistent about handling unsupported 440 * attributes. We ignored the access time and the 441 * read and execute bits. We were strict for the other 442 * attributes. 443 * 444 * Here we are strict, stricter than ufs in not allowing 445 * users to attempt to set SF_SETTABLE bits or anyone to 446 * set unsupported bits. However, we ignore attempts to 447 * set ATTR_ARCHIVE for directories `cp -pr' from a more 448 * sensible file system attempts it a lot. 449 */ 450 if (cred->cr_uid != 0) { 451 if (vap->va_flags & SF_SETTABLE) 452 return EPERM; 453 } 454 if (vap->va_flags & ~SF_ARCHIVED) 455 return EOPNOTSUPP; 456 if (vap->va_flags & SF_ARCHIVED) 457 dep->de_Attributes &= ~ATTR_ARCHIVE; 458 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 459 dep->de_Attributes |= ATTR_ARCHIVE; 460 dep->de_flag |= DE_MODIFIED; 461 } 462 463 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 464 uid_t uid; 465 gid_t gid; 466 467 if (vp->v_mount->mnt_flag & MNT_RDONLY) 468 return (EROFS); 469 uid = vap->va_uid; 470 if (uid == (uid_t)VNOVAL) 471 uid = pmp->pm_uid; 472 gid = vap->va_gid; 473 if (gid == (gid_t)VNOVAL) 474 gid = pmp->pm_gid; 475 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 476 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 477 (error = suser_cred(cred, PRISON_ROOT))) 478 return error; 479 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 480 return EINVAL; 481 } 482 483 if (vap->va_size != VNOVAL) { 484 /* 485 * Disallow write attempts on read-only file systems; 486 * unless the file is a socket, fifo, or a block or 487 * character device resident on the file system. 488 */ 489 switch (vp->v_type) { 490 case VDIR: 491 return (EISDIR); 492 /* NOT REACHED */ 493 case VLNK: 494 case VREG: 495 if (vp->v_mount->mnt_flag & MNT_RDONLY) 496 return (EROFS); 497 break; 498 default: 499 break; 500 } 501 error = detrunc(dep, vap->va_size, 0, ap->a_td); 502 if (error) 503 return error; 504 } 505 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 506 if (vp->v_mount->mnt_flag & MNT_RDONLY) 507 return (EROFS); 508 if (cred->cr_uid != pmp->pm_uid && 509 (error = suser_cred(cred, PRISON_ROOT)) && 510 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 511 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td)))) 512 return (error); 513 if (vp->v_type != VDIR) { 514 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 515 vap->va_atime.tv_sec != VNOVAL) { 516 dep->de_flag &= ~DE_ACCESS; 517 unix2dostime(&vap->va_atime, &dep->de_ADate, 518 NULL, NULL); 519 } 520 if (vap->va_mtime.tv_sec != VNOVAL) { 521 dep->de_flag &= ~DE_UPDATE; 522 unix2dostime(&vap->va_mtime, &dep->de_MDate, 523 &dep->de_MTime, NULL); 524 } 525 dep->de_Attributes |= ATTR_ARCHIVE; 526 dep->de_flag |= DE_MODIFIED; 527 } 528 } 529 /* 530 * DOS files only have the ability to have their writability 531 * attribute set, so we use the owner write bit to set the readonly 532 * attribute. 533 */ 534 if (vap->va_mode != (mode_t)VNOVAL) { 535 if (vp->v_mount->mnt_flag & MNT_RDONLY) 536 return (EROFS); 537 if (cred->cr_uid != pmp->pm_uid && 538 (error = suser_cred(cred, PRISON_ROOT))) 539 return (error); 540 if (vp->v_type != VDIR) { 541 /* We ignore the read and execute bits. */ 542 if (vap->va_mode & VWRITE) 543 dep->de_Attributes &= ~ATTR_READONLY; 544 else 545 dep->de_Attributes |= ATTR_READONLY; 546 dep->de_Attributes |= ATTR_ARCHIVE; 547 dep->de_flag |= DE_MODIFIED; 548 } 549 } 550 return (deupdat(dep, 1)); 551 } 552 553 static int 554 msdosfs_read(ap) 555 struct vop_read_args /* { 556 struct vnode *a_vp; 557 struct uio *a_uio; 558 int a_ioflag; 559 struct ucred *a_cred; 560 } */ *ap; 561 { 562 int error = 0; 563 int blsize; 564 int isadir; 565 int orig_resid; 566 u_int n; 567 u_long diff; 568 u_long on; 569 daddr_t lbn; 570 daddr_t rablock; 571 int rasize; 572 int seqcount; 573 struct buf *bp; 574 struct vnode *vp = ap->a_vp; 575 struct denode *dep = VTODE(vp); 576 struct msdosfsmount *pmp = dep->de_pmp; 577 struct uio *uio = ap->a_uio; 578 579 if (uio->uio_offset < 0) 580 return (EINVAL); 581 582 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 583 return (0); 584 /* 585 * If they didn't ask for any data, then we are done. 586 */ 587 orig_resid = uio->uio_resid; 588 if (orig_resid <= 0) 589 return (0); 590 591 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 592 593 isadir = dep->de_Attributes & ATTR_DIRECTORY; 594 do { 595 if (uio->uio_offset >= dep->de_FileSize) 596 break; 597 lbn = de_cluster(pmp, uio->uio_offset); 598 /* 599 * If we are operating on a directory file then be sure to 600 * do i/o with the vnode for the filesystem instead of the 601 * vnode for the directory. 602 */ 603 if (isadir) { 604 /* convert cluster # to block # */ 605 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 606 if (error == E2BIG) { 607 error = EINVAL; 608 break; 609 } else if (error) 610 break; 611 error = bread(pmp->pm_devvp, lbn, blsize, &bp); 612 } else { 613 blsize = pmp->pm_bpcluster; 614 rablock = lbn + 1; 615 if (seqcount > 1 && 616 de_cn2off(pmp, rablock) < dep->de_FileSize) { 617 rasize = pmp->pm_bpcluster; 618 error = breadn(vp, lbn, blsize, 619 &rablock, &rasize, 1, &bp); 620 } else { 621 error = bread(vp, lbn, blsize, &bp); 622 } 623 } 624 if (error) { 625 brelse(bp); 626 break; 627 } 628 on = uio->uio_offset & pmp->pm_crbomask; 629 diff = pmp->pm_bpcluster - on; 630 n = diff > uio->uio_resid ? uio->uio_resid : diff; 631 diff = dep->de_FileSize - uio->uio_offset; 632 if (diff < n) 633 n = diff; 634 diff = blsize - bp->b_resid; 635 if (diff < n) 636 n = diff; 637 error = uiomove(bp->b_data + on, (int) n, uio); 638 brelse(bp); 639 } while (error == 0 && uio->uio_resid > 0 && n != 0); 640 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 641 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 642 dep->de_flag |= DE_ACCESS; 643 return (error); 644 } 645 646 /* 647 * Write data to a file or directory. 648 */ 649 static int 650 msdosfs_write(ap) 651 struct vop_write_args /* { 652 struct vnode *a_vp; 653 struct uio *a_uio; 654 int a_ioflag; 655 struct ucred *a_cred; 656 } */ *ap; 657 { 658 int n; 659 int croffset; 660 int resid; 661 u_long osize; 662 int error = 0; 663 u_long count; 664 daddr_t bn, lastcn; 665 struct buf *bp; 666 int ioflag = ap->a_ioflag; 667 struct uio *uio = ap->a_uio; 668 struct thread *td = uio->uio_td; 669 struct vnode *vp = ap->a_vp; 670 struct vnode *thisvp; 671 struct denode *dep = VTODE(vp); 672 struct msdosfsmount *pmp = dep->de_pmp; 673 struct proc *p = td->td_proc; 674 675 #ifdef MSDOSFS_DEBUG 676 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 677 vp, uio, ioflag, cred); 678 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 679 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 680 #endif 681 682 switch (vp->v_type) { 683 case VREG: 684 if (ioflag & IO_APPEND) 685 uio->uio_offset = dep->de_FileSize; 686 thisvp = vp; 687 break; 688 case VDIR: 689 return EISDIR; 690 default: 691 panic("msdosfs_write(): bad file type"); 692 } 693 694 if (uio->uio_offset < 0) 695 return (EFBIG); 696 697 if (uio->uio_resid == 0) 698 return (0); 699 700 /* 701 * If they've exceeded their filesize limit, tell them about it. 702 */ 703 if (p && 704 ((uoff_t)uio->uio_offset + uio->uio_resid > 705 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 706 psignal(p, SIGXFSZ); 707 return (EFBIG); 708 } 709 710 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 711 return (EFBIG); 712 713 /* 714 * If the offset we are starting the write at is beyond the end of 715 * the file, then they've done a seek. Unix filesystems allow 716 * files with holes in them, DOS doesn't so we must fill the hole 717 * with zeroed blocks. 718 */ 719 if (uio->uio_offset > dep->de_FileSize) { 720 error = deextend(dep, uio->uio_offset); 721 if (error) 722 return (error); 723 } 724 725 /* 726 * Remember some values in case the write fails. 727 */ 728 resid = uio->uio_resid; 729 osize = dep->de_FileSize; 730 731 /* 732 * If we write beyond the end of the file, extend it to its ultimate 733 * size ahead of the time to hopefully get a contiguous area. 734 */ 735 if (uio->uio_offset + resid > osize) { 736 count = de_clcount(pmp, uio->uio_offset + resid) - 737 de_clcount(pmp, osize); 738 error = extendfile(dep, count, NULL, NULL, 0); 739 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 740 goto errexit; 741 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 742 } else 743 lastcn = de_clcount(pmp, osize) - 1; 744 745 do { 746 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 747 error = ENOSPC; 748 break; 749 } 750 751 croffset = uio->uio_offset & pmp->pm_crbomask; 752 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 753 if (uio->uio_offset + n > dep->de_FileSize) { 754 dep->de_FileSize = uio->uio_offset + n; 755 /* The object size needs to be set before buffer is allocated */ 756 vnode_pager_setsize(vp, dep->de_FileSize); 757 } 758 759 bn = de_cluster(pmp, uio->uio_offset); 760 if ((uio->uio_offset & pmp->pm_crbomask) == 0 761 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 762 > de_cluster(pmp, uio->uio_offset) 763 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 764 /* 765 * If either the whole cluster gets written, 766 * or we write the cluster from its start beyond EOF, 767 * then no need to read data from disk. 768 */ 769 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 770 clrbuf(bp); 771 /* 772 * Do the bmap now, since pcbmap needs buffers 773 * for the fat table. (see msdosfs_strategy) 774 */ 775 if (bp->b_blkno == bp->b_lblkno) { 776 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 777 0, 0); 778 if (error) 779 bp->b_blkno = -1; 780 } 781 if (bp->b_blkno == -1) { 782 brelse(bp); 783 if (!error) 784 error = EIO; /* XXX */ 785 break; 786 } 787 } else { 788 /* 789 * The block we need to write into exists, so read it in. 790 */ 791 error = bread(thisvp, bn, pmp->pm_bpcluster, &bp); 792 if (error) { 793 brelse(bp); 794 break; 795 } 796 } 797 798 /* 799 * Should these vnode_pager_* functions be done on dir 800 * files? 801 */ 802 803 /* 804 * Copy the data from user space into the buf header. 805 */ 806 error = uiomove(bp->b_data + croffset, n, uio); 807 if (error) { 808 brelse(bp); 809 break; 810 } 811 812 /* 813 * If they want this synchronous then write it and wait for 814 * it. Otherwise, if on a cluster boundary write it 815 * asynchronously so we can move on to the next block 816 * without delay. Otherwise do a delayed write because we 817 * may want to write somemore into the block later. 818 */ 819 if (ioflag & IO_SYNC) 820 (void) bwrite(bp); 821 else if (n + croffset == pmp->pm_bpcluster) 822 bawrite(bp); 823 else 824 bdwrite(bp); 825 dep->de_flag |= DE_UPDATE; 826 } while (error == 0 && uio->uio_resid > 0); 827 828 /* 829 * If the write failed and they want us to, truncate the file back 830 * to the size it was before the write was attempted. 831 */ 832 errexit: 833 if (error) { 834 if (ioflag & IO_UNIT) { 835 detrunc(dep, osize, ioflag & IO_SYNC, NULL); 836 uio->uio_offset -= resid - uio->uio_resid; 837 uio->uio_resid = resid; 838 } else { 839 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NULL); 840 if (uio->uio_resid != resid) 841 error = 0; 842 } 843 } else if (ioflag & IO_SYNC) 844 error = deupdat(dep, 1); 845 return (error); 846 } 847 848 /* 849 * Flush the blocks of a file to disk. 850 * 851 * This function is worthless for vnodes that represent directories. Maybe we 852 * could just do a sync if they try an fsync on a directory file. 853 */ 854 static int 855 msdosfs_fsync(ap) 856 struct vop_fsync_args /* { 857 struct vnode *a_vp; 858 struct ucred *a_cred; 859 int a_waitfor; 860 struct thread *a_td; 861 } */ *ap; 862 { 863 struct vnode *vp = ap->a_vp; 864 int s; 865 struct buf *bp, *nbp; 866 867 /* 868 * Flush all dirty buffers associated with a vnode. 869 */ 870 loop: 871 s = splbio(); 872 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 873 nbp = TAILQ_NEXT(bp, b_vnbufs); 874 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) 875 continue; 876 if ((bp->b_flags & B_DELWRI) == 0) 877 panic("msdosfs_fsync: not dirty"); 878 bremfree(bp); 879 splx(s); 880 (void) bwrite(bp); 881 goto loop; 882 } 883 while (vp->v_numoutput) { 884 vp->v_flag |= VBWAIT; 885 (void) tsleep((caddr_t)&vp->v_numoutput, 0, "msdosfsn", 0); 886 } 887 #ifdef DIAGNOSTIC 888 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) { 889 vprint("msdosfs_fsync: dirty", vp); 890 goto loop; 891 } 892 #endif 893 splx(s); 894 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 895 } 896 897 static int 898 msdosfs_remove(ap) 899 struct vop_remove_args /* { 900 struct vnode *a_dvp; 901 struct vnode *a_vp; 902 struct componentname *a_cnp; 903 } */ *ap; 904 { 905 struct denode *dep = VTODE(ap->a_vp); 906 struct denode *ddep = VTODE(ap->a_dvp); 907 int error; 908 909 if (ap->a_vp->v_type == VDIR) 910 error = EPERM; 911 else 912 error = removede(ddep, dep); 913 #ifdef MSDOSFS_DEBUG 914 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 915 #endif 916 return (error); 917 } 918 919 /* 920 * DOS filesystems don't know what links are. But since we already called 921 * msdosfs_lookup() with create and lockparent, the parent is locked so we 922 * have to free it before we return the error. 923 */ 924 static int 925 msdosfs_link(ap) 926 struct vop_link_args /* { 927 struct vnode *a_tdvp; 928 struct vnode *a_vp; 929 struct componentname *a_cnp; 930 } */ *ap; 931 { 932 return (EOPNOTSUPP); 933 } 934 935 /* 936 * Renames on files require moving the denode to a new hash queue since the 937 * denode's location is used to compute which hash queue to put the file 938 * in. Unless it is a rename in place. For example "mv a b". 939 * 940 * What follows is the basic algorithm: 941 * 942 * if (file move) { 943 * if (dest file exists) { 944 * remove dest file 945 * } 946 * if (dest and src in same directory) { 947 * rewrite name in existing directory slot 948 * } else { 949 * write new entry in dest directory 950 * update offset and dirclust in denode 951 * move denode to new hash chain 952 * clear old directory entry 953 * } 954 * } else { 955 * directory move 956 * if (dest directory exists) { 957 * if (dest is not empty) { 958 * return ENOTEMPTY 959 * } 960 * remove dest directory 961 * } 962 * if (dest and src in same directory) { 963 * rewrite name in existing entry 964 * } else { 965 * be sure dest is not a child of src directory 966 * write entry in dest directory 967 * update "." and ".." in moved directory 968 * clear old directory entry for moved directory 969 * } 970 * } 971 * 972 * On entry: 973 * source's parent directory is unlocked 974 * source file or directory is unlocked 975 * destination's parent directory is locked 976 * destination file or directory is locked if it exists 977 * 978 * On exit: 979 * all denodes should be released 980 * 981 * Notes: 982 * I'm not sure how the memory containing the pathnames pointed at by the 983 * componentname structures is freed, there may be some memory bleeding 984 * for each rename done. 985 */ 986 static int 987 msdosfs_rename(ap) 988 struct vop_rename_args /* { 989 struct vnode *a_fdvp; 990 struct vnode *a_fvp; 991 struct componentname *a_fcnp; 992 struct vnode *a_tdvp; 993 struct vnode *a_tvp; 994 struct componentname *a_tcnp; 995 } */ *ap; 996 { 997 struct vnode *tdvp = ap->a_tdvp; 998 struct vnode *fvp = ap->a_fvp; 999 struct vnode *fdvp = ap->a_fdvp; 1000 struct vnode *tvp = ap->a_tvp; 1001 struct componentname *tcnp = ap->a_tcnp; 1002 struct componentname *fcnp = ap->a_fcnp; 1003 struct thread *td = fcnp->cn_td; 1004 struct denode *ip, *xp, *dp, *zp; 1005 u_char toname[11], oldname[11]; 1006 u_long from_diroffset, to_diroffset; 1007 u_char to_count; 1008 int doingdirectory = 0, newparent = 0; 1009 int error; 1010 u_long cn; 1011 daddr_t bn; 1012 struct denode *fddep; /* from file's parent directory */ 1013 struct msdosfsmount *pmp; 1014 struct direntry *dotdotp; 1015 struct buf *bp; 1016 1017 fddep = VTODE(ap->a_fdvp); 1018 pmp = fddep->de_pmp; 1019 1020 pmp = VFSTOMSDOSFS(fdvp->v_mount); 1021 1022 #ifdef DIAGNOSTIC 1023 if ((tcnp->cn_flags & CNP_HASBUF) == 0 || 1024 (fcnp->cn_flags & CNP_HASBUF) == 0) 1025 panic("msdosfs_rename: no name"); 1026 #endif 1027 /* 1028 * Check for cross-device rename. 1029 */ 1030 if ((fvp->v_mount != tdvp->v_mount) || 1031 (tvp && (fvp->v_mount != tvp->v_mount))) { 1032 error = EXDEV; 1033 abortit: 1034 if (tdvp == tvp) 1035 vrele(tdvp); 1036 else 1037 vput(tdvp); 1038 if (tvp) 1039 vput(tvp); 1040 vrele(fdvp); 1041 vrele(fvp); 1042 return (error); 1043 } 1044 1045 /* 1046 * If source and dest are the same, do nothing. 1047 */ 1048 if (tvp == fvp) { 1049 error = 0; 1050 goto abortit; 1051 } 1052 1053 error = vn_lock(fvp, LK_EXCLUSIVE, td); 1054 if (error) 1055 goto abortit; 1056 dp = VTODE(fdvp); 1057 ip = VTODE(fvp); 1058 1059 /* 1060 * Be sure we are not renaming ".", "..", or an alias of ".". This 1061 * leads to a crippled directory tree. It's pretty tough to do a 1062 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1063 * doesn't work if the ".." entry is missing. 1064 */ 1065 if (ip->de_Attributes & ATTR_DIRECTORY) { 1066 /* 1067 * Avoid ".", "..", and aliases of "." for obvious reasons. 1068 */ 1069 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1070 dp == ip || 1071 (fcnp->cn_flags & CNP_ISDOTDOT) || 1072 (tcnp->cn_flags & CNP_ISDOTDOT) || 1073 (ip->de_flag & DE_RENAME)) { 1074 VOP_UNLOCK(fvp, 0, td); 1075 error = EINVAL; 1076 goto abortit; 1077 } 1078 ip->de_flag |= DE_RENAME; 1079 doingdirectory++; 1080 } 1081 1082 /* 1083 * When the target exists, both the directory 1084 * and target vnodes are returned locked. 1085 */ 1086 dp = VTODE(tdvp); 1087 xp = tvp ? VTODE(tvp) : NULL; 1088 /* 1089 * Remember direntry place to use for destination 1090 */ 1091 to_diroffset = dp->de_fndoffset; 1092 to_count = dp->de_fndcnt; 1093 1094 /* 1095 * If ".." must be changed (ie the directory gets a new 1096 * parent) then the source directory must not be in the 1097 * directory heirarchy above the target, as this would 1098 * orphan everything below the source directory. Also 1099 * the user must have write permission in the source so 1100 * as to be able to change "..". We must repeat the call 1101 * to namei, as the parent directory is unlocked by the 1102 * call to doscheckpath(). 1103 */ 1104 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td); 1105 VOP_UNLOCK(fvp, 0, td); 1106 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1107 newparent = 1; 1108 if (doingdirectory && newparent) { 1109 if (error) /* write access check above */ 1110 goto bad; 1111 if (xp != NULL) 1112 vput(tvp); 1113 /* 1114 * doscheckpath() vput()'s dp, 1115 * so we have to do a relookup afterwards 1116 */ 1117 error = doscheckpath(ip, dp); 1118 if (error) 1119 goto out; 1120 if ((tcnp->cn_flags & CNP_SAVESTART) == 0) 1121 panic("msdosfs_rename: lost to startdir"); 1122 error = relookup(tdvp, &tvp, tcnp); 1123 if (error) 1124 goto out; 1125 dp = VTODE(tdvp); 1126 xp = tvp ? VTODE(tvp) : NULL; 1127 } 1128 1129 if (xp != NULL) { 1130 /* 1131 * Target must be empty if a directory and have no links 1132 * to it. Also, ensure source and target are compatible 1133 * (both directories, or both not directories). 1134 */ 1135 if (xp->de_Attributes & ATTR_DIRECTORY) { 1136 if (!dosdirempty(xp)) { 1137 error = ENOTEMPTY; 1138 goto bad; 1139 } 1140 if (!doingdirectory) { 1141 error = ENOTDIR; 1142 goto bad; 1143 } 1144 cache_purge(tdvp); 1145 } else if (doingdirectory) { 1146 error = EISDIR; 1147 goto bad; 1148 } 1149 error = removede(dp, xp); 1150 if (error) 1151 goto bad; 1152 vput(tvp); 1153 xp = NULL; 1154 } 1155 1156 /* 1157 * Convert the filename in tcnp into a dos filename. We copy this 1158 * into the denode and directory entry for the destination 1159 * file/directory. 1160 */ 1161 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1162 if (error) 1163 goto abortit; 1164 1165 /* 1166 * Since from wasn't locked at various places above, 1167 * have to do a relookup here. 1168 */ 1169 fcnp->cn_flags &= ~CNP_MODMASK; 1170 fcnp->cn_flags |= CNP_LOCKPARENT | CNP_LOCKLEAF; 1171 if ((fcnp->cn_flags & CNP_SAVESTART) == 0) 1172 panic("msdosfs_rename: lost from startdir"); 1173 if (!newparent) 1174 VOP_UNLOCK(tdvp, 0, td); 1175 if (relookup(fdvp, &fvp, fcnp) == 0) 1176 vrele(fdvp); 1177 if (fvp == NULL) { 1178 /* 1179 * From name has disappeared. 1180 */ 1181 if (doingdirectory) 1182 panic("rename: lost dir entry"); 1183 vrele(ap->a_fvp); 1184 if (newparent) 1185 VOP_UNLOCK(tdvp, 0, td); 1186 vrele(tdvp); 1187 return 0; 1188 } 1189 xp = VTODE(fvp); 1190 zp = VTODE(fdvp); 1191 from_diroffset = zp->de_fndoffset; 1192 1193 /* 1194 * Ensure that the directory entry still exists and has not 1195 * changed till now. If the source is a file the entry may 1196 * have been unlinked or renamed. In either case there is 1197 * no further work to be done. If the source is a directory 1198 * then it cannot have been rmdir'ed or renamed; this is 1199 * prohibited by the DE_RENAME flag. 1200 */ 1201 if (xp != ip) { 1202 if (doingdirectory) 1203 panic("rename: lost dir entry"); 1204 vrele(ap->a_fvp); 1205 VOP_UNLOCK(fvp, 0, td); 1206 if (newparent) 1207 VOP_UNLOCK(fdvp, 0, td); 1208 xp = NULL; 1209 } else { 1210 vrele(fvp); 1211 xp = NULL; 1212 1213 /* 1214 * First write a new entry in the destination 1215 * directory and mark the entry in the source directory 1216 * as deleted. Then move the denode to the correct hash 1217 * chain for its new location in the filesystem. And, if 1218 * we moved a directory, then update its .. entry to point 1219 * to the new parent directory. 1220 */ 1221 bcopy(ip->de_Name, oldname, 11); 1222 bcopy(toname, ip->de_Name, 11); /* update denode */ 1223 dp->de_fndoffset = to_diroffset; 1224 dp->de_fndcnt = to_count; 1225 error = createde(ip, dp, (struct denode **)0, tcnp); 1226 if (error) { 1227 bcopy(oldname, ip->de_Name, 11); 1228 if (newparent) 1229 VOP_UNLOCK(fdvp, 0, td); 1230 VOP_UNLOCK(fvp, 0, td); 1231 goto bad; 1232 } 1233 ip->de_refcnt++; 1234 zp->de_fndoffset = from_diroffset; 1235 error = removede(zp, ip); 1236 if (error) { 1237 /* XXX should really panic here, fs is corrupt */ 1238 if (newparent) 1239 VOP_UNLOCK(fdvp, 0, td); 1240 VOP_UNLOCK(fvp, 0, td); 1241 goto bad; 1242 } 1243 if (!doingdirectory) { 1244 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1245 &ip->de_dirclust, 0); 1246 if (error) { 1247 /* XXX should really panic here, fs is corrupt */ 1248 if (newparent) 1249 VOP_UNLOCK(fdvp, 0, td); 1250 VOP_UNLOCK(fvp, 0, td); 1251 goto bad; 1252 } 1253 if (ip->de_dirclust == MSDOSFSROOT) 1254 ip->de_diroffset = to_diroffset; 1255 else 1256 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1257 } 1258 reinsert(ip); 1259 if (newparent) 1260 VOP_UNLOCK(fdvp, 0, td); 1261 } 1262 1263 /* 1264 * If we moved a directory to a new parent directory, then we must 1265 * fixup the ".." entry in the moved directory. 1266 */ 1267 if (doingdirectory && newparent) { 1268 cn = ip->de_StartCluster; 1269 if (cn == MSDOSFSROOT) { 1270 /* this should never happen */ 1271 panic("msdosfs_rename(): updating .. in root directory?"); 1272 } else 1273 bn = cntobn(pmp, cn); 1274 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp); 1275 if (error) { 1276 /* XXX should really panic here, fs is corrupt */ 1277 brelse(bp); 1278 VOP_UNLOCK(fvp, 0, td); 1279 goto bad; 1280 } 1281 dotdotp = (struct direntry *)bp->b_data + 1; 1282 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1283 if (FAT32(pmp)) 1284 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1285 error = bwrite(bp); 1286 if (error) { 1287 /* XXX should really panic here, fs is corrupt */ 1288 VOP_UNLOCK(fvp, 0, td); 1289 goto bad; 1290 } 1291 } 1292 1293 VOP_UNLOCK(fvp, 0, td); 1294 bad: 1295 if (xp) 1296 vput(tvp); 1297 vput(tdvp); 1298 out: 1299 ip->de_flag &= ~DE_RENAME; 1300 vrele(fdvp); 1301 vrele(fvp); 1302 return (error); 1303 1304 } 1305 1306 static struct { 1307 struct direntry dot; 1308 struct direntry dotdot; 1309 } dosdirtemplate = { 1310 { ". ", " ", /* the . entry */ 1311 ATTR_DIRECTORY, /* file attribute */ 1312 0, /* reserved */ 1313 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1314 { 0, 0 }, /* access date */ 1315 { 0, 0 }, /* high bits of start cluster */ 1316 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1317 { 0, 0 }, /* startcluster */ 1318 { 0, 0, 0, 0 } /* filesize */ 1319 }, 1320 { ".. ", " ", /* the .. entry */ 1321 ATTR_DIRECTORY, /* file attribute */ 1322 0, /* reserved */ 1323 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1324 { 0, 0 }, /* access date */ 1325 { 0, 0 }, /* high bits of start cluster */ 1326 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1327 { 0, 0 }, /* startcluster */ 1328 { 0, 0, 0, 0 } /* filesize */ 1329 } 1330 }; 1331 1332 static int 1333 msdosfs_mkdir(ap) 1334 struct vop_mkdir_args /* { 1335 struct vnode *a_dvp; 1336 struvt vnode **a_vpp; 1337 struvt componentname *a_cnp; 1338 struct vattr *a_vap; 1339 } */ *ap; 1340 { 1341 struct componentname *cnp = ap->a_cnp; 1342 struct denode *dep; 1343 struct denode *pdep = VTODE(ap->a_dvp); 1344 struct direntry *denp; 1345 struct msdosfsmount *pmp = pdep->de_pmp; 1346 struct buf *bp; 1347 u_long newcluster, pcl; 1348 int bn; 1349 int error; 1350 struct denode ndirent; 1351 struct timespec ts; 1352 1353 /* 1354 * If this is the root directory and there is no space left we 1355 * can't do anything. This is because the root directory can not 1356 * change size. 1357 */ 1358 if (pdep->de_StartCluster == MSDOSFSROOT 1359 && pdep->de_fndoffset >= pdep->de_FileSize) { 1360 error = ENOSPC; 1361 goto bad2; 1362 } 1363 1364 /* 1365 * Allocate a cluster to hold the about to be created directory. 1366 */ 1367 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1368 if (error) 1369 goto bad2; 1370 1371 bzero(&ndirent, sizeof(ndirent)); 1372 ndirent.de_pmp = pmp; 1373 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1374 getnanotime(&ts); 1375 DETIMES(&ndirent, &ts, &ts, &ts); 1376 1377 /* 1378 * Now fill the cluster with the "." and ".." entries. And write 1379 * the cluster to disk. This way it is there for the parent 1380 * directory to be pointing at if there were a crash. 1381 */ 1382 bn = cntobn(pmp, newcluster); 1383 /* always succeeds */ 1384 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1385 bzero(bp->b_data, pmp->pm_bpcluster); 1386 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1387 denp = (struct direntry *)bp->b_data; 1388 putushort(denp[0].deStartCluster, newcluster); 1389 putushort(denp[0].deCDate, ndirent.de_CDate); 1390 putushort(denp[0].deCTime, ndirent.de_CTime); 1391 denp[0].deCHundredth = ndirent.de_CHun; 1392 putushort(denp[0].deADate, ndirent.de_ADate); 1393 putushort(denp[0].deMDate, ndirent.de_MDate); 1394 putushort(denp[0].deMTime, ndirent.de_MTime); 1395 pcl = pdep->de_StartCluster; 1396 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1397 pcl = 0; 1398 putushort(denp[1].deStartCluster, pcl); 1399 putushort(denp[1].deCDate, ndirent.de_CDate); 1400 putushort(denp[1].deCTime, ndirent.de_CTime); 1401 denp[1].deCHundredth = ndirent.de_CHun; 1402 putushort(denp[1].deADate, ndirent.de_ADate); 1403 putushort(denp[1].deMDate, ndirent.de_MDate); 1404 putushort(denp[1].deMTime, ndirent.de_MTime); 1405 if (FAT32(pmp)) { 1406 putushort(denp[0].deHighClust, newcluster >> 16); 1407 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1408 } 1409 1410 error = bwrite(bp); 1411 if (error) 1412 goto bad; 1413 1414 /* 1415 * Now build up a directory entry pointing to the newly allocated 1416 * cluster. This will be written to an empty slot in the parent 1417 * directory. 1418 */ 1419 #ifdef DIAGNOSTIC 1420 if ((cnp->cn_flags & CNP_HASBUF) == 0) 1421 panic("msdosfs_mkdir: no name"); 1422 #endif 1423 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1424 if (error) 1425 goto bad; 1426 1427 ndirent.de_Attributes = ATTR_DIRECTORY; 1428 ndirent.de_LowerCase = 0; 1429 ndirent.de_StartCluster = newcluster; 1430 ndirent.de_FileSize = 0; 1431 ndirent.de_dev = pdep->de_dev; 1432 ndirent.de_devvp = pdep->de_devvp; 1433 error = createde(&ndirent, pdep, &dep, cnp); 1434 if (error) 1435 goto bad; 1436 *ap->a_vpp = DETOV(dep); 1437 return (0); 1438 1439 bad: 1440 clusterfree(pmp, newcluster, NULL); 1441 bad2: 1442 return (error); 1443 } 1444 1445 static int 1446 msdosfs_rmdir(ap) 1447 struct vop_rmdir_args /* { 1448 struct vnode *a_dvp; 1449 struct vnode *a_vp; 1450 struct componentname *a_cnp; 1451 } */ *ap; 1452 { 1453 struct vnode *vp = ap->a_vp; 1454 struct vnode *dvp = ap->a_dvp; 1455 struct componentname *cnp = ap->a_cnp; 1456 struct denode *ip, *dp; 1457 struct thread *td = cnp->cn_td; 1458 int error; 1459 1460 ip = VTODE(vp); 1461 dp = VTODE(dvp); 1462 1463 /* 1464 * Verify the directory is empty (and valid). 1465 * (Rmdir ".." won't be valid since 1466 * ".." will contain a reference to 1467 * the current directory and thus be 1468 * non-empty.) 1469 */ 1470 error = 0; 1471 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1472 error = ENOTEMPTY; 1473 goto out; 1474 } 1475 /* 1476 * Delete the entry from the directory. For dos filesystems this 1477 * gets rid of the directory entry on disk, the in memory copy 1478 * still exists but the de_refcnt is <= 0. This prevents it from 1479 * being found by deget(). When the vput() on dep is done we give 1480 * up access and eventually msdosfs_reclaim() will be called which 1481 * will remove it from the denode cache. 1482 */ 1483 error = removede(dp, ip); 1484 if (error) 1485 goto out; 1486 /* 1487 * This is where we decrement the link count in the parent 1488 * directory. Since dos filesystems don't do this we just purge 1489 * the name cache. 1490 */ 1491 cache_purge(dvp); 1492 VOP_UNLOCK(dvp, 0, td); 1493 /* 1494 * Truncate the directory that is being deleted. 1495 */ 1496 error = detrunc(ip, (u_long)0, IO_SYNC, td); 1497 cache_purge(vp); 1498 1499 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 1500 out: 1501 return (error); 1502 } 1503 1504 /* 1505 * DOS filesystems don't know what symlinks are. 1506 */ 1507 static int 1508 msdosfs_symlink(ap) 1509 struct vop_symlink_args /* { 1510 struct vnode *a_dvp; 1511 struct vnode **a_vpp; 1512 struct componentname *a_cnp; 1513 struct vattr *a_vap; 1514 char *a_target; 1515 } */ *ap; 1516 { 1517 return (EOPNOTSUPP); 1518 } 1519 1520 static int 1521 msdosfs_readdir(ap) 1522 struct vop_readdir_args /* { 1523 struct vnode *a_vp; 1524 struct uio *a_uio; 1525 struct ucred *a_cred; 1526 int *a_eofflag; 1527 int *a_ncookies; 1528 u_long **a_cookies; 1529 } */ *ap; 1530 { 1531 int error = 0; 1532 int diff; 1533 long n; 1534 int blsize; 1535 long on; 1536 u_long cn; 1537 u_long fileno; 1538 u_long dirsperblk; 1539 long bias = 0; 1540 daddr_t bn, lbn; 1541 struct buf *bp; 1542 struct denode *dep = VTODE(ap->a_vp); 1543 struct msdosfsmount *pmp = dep->de_pmp; 1544 struct direntry *dentp; 1545 struct dirent dirbuf; 1546 struct uio *uio = ap->a_uio; 1547 u_long *cookies = NULL; 1548 int ncookies = 0; 1549 off_t offset, off; 1550 int chksum = -1; 1551 1552 #ifdef MSDOSFS_DEBUG 1553 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1554 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1555 #endif 1556 1557 /* 1558 * msdosfs_readdir() won't operate properly on regular files since 1559 * it does i/o only with the the filesystem vnode, and hence can 1560 * retrieve the wrong block from the buffer cache for a plain file. 1561 * So, fail attempts to readdir() on a plain file. 1562 */ 1563 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1564 return (ENOTDIR); 1565 1566 /* 1567 * To be safe, initialize dirbuf 1568 */ 1569 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1570 1571 /* 1572 * If the user buffer is smaller than the size of one dos directory 1573 * entry or the file offset is not a multiple of the size of a 1574 * directory entry, then we fail the read. 1575 */ 1576 off = offset = uio->uio_offset; 1577 if (uio->uio_resid < sizeof(struct direntry) || 1578 (offset & (sizeof(struct direntry) - 1))) 1579 return (EINVAL); 1580 1581 if (ap->a_ncookies) { 1582 ncookies = uio->uio_resid / 16; 1583 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1584 M_WAITOK); 1585 *ap->a_cookies = cookies; 1586 *ap->a_ncookies = ncookies; 1587 } 1588 1589 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1590 1591 /* 1592 * If they are reading from the root directory then, we simulate 1593 * the . and .. entries since these don't exist in the root 1594 * directory. We also set the offset bias to make up for having to 1595 * simulate these entries. By this I mean that at file offset 64 we 1596 * read the first entry in the root directory that lives on disk. 1597 */ 1598 if (dep->de_StartCluster == MSDOSFSROOT 1599 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1600 #if 0 1601 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1602 offset); 1603 #endif 1604 bias = 2 * sizeof(struct direntry); 1605 if (offset < bias) { 1606 for (n = (int)offset / sizeof(struct direntry); 1607 n < 2; n++) { 1608 if (FAT32(pmp)) 1609 dirbuf.d_fileno = cntobn(pmp, 1610 pmp->pm_rootdirblk) 1611 * dirsperblk; 1612 else 1613 dirbuf.d_fileno = 1; 1614 dirbuf.d_type = DT_DIR; 1615 switch (n) { 1616 case 0: 1617 dirbuf.d_namlen = 1; 1618 strcpy(dirbuf.d_name, "."); 1619 break; 1620 case 1: 1621 dirbuf.d_namlen = 2; 1622 strcpy(dirbuf.d_name, ".."); 1623 break; 1624 } 1625 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1626 if (uio->uio_resid < dirbuf.d_reclen) 1627 goto out; 1628 error = uiomove((caddr_t) &dirbuf, 1629 dirbuf.d_reclen, uio); 1630 if (error) 1631 goto out; 1632 offset += sizeof(struct direntry); 1633 off = offset; 1634 if (cookies) { 1635 *cookies++ = offset; 1636 if (--ncookies <= 0) 1637 goto out; 1638 } 1639 } 1640 } 1641 } 1642 1643 off = offset; 1644 while (uio->uio_resid > 0) { 1645 lbn = de_cluster(pmp, offset - bias); 1646 on = (offset - bias) & pmp->pm_crbomask; 1647 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1648 diff = dep->de_FileSize - (offset - bias); 1649 if (diff <= 0) 1650 break; 1651 n = min(n, diff); 1652 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1653 if (error) 1654 break; 1655 error = bread(pmp->pm_devvp, bn, blsize, &bp); 1656 if (error) { 1657 brelse(bp); 1658 return (error); 1659 } 1660 n = min(n, blsize - bp->b_resid); 1661 1662 /* 1663 * Convert from dos directory entries to fs-independent 1664 * directory entries. 1665 */ 1666 for (dentp = (struct direntry *)(bp->b_data + on); 1667 (char *)dentp < bp->b_data + on + n; 1668 dentp++, offset += sizeof(struct direntry)) { 1669 #if 0 1670 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1671 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1672 #endif 1673 /* 1674 * If this is an unused entry, we can stop. 1675 */ 1676 if (dentp->deName[0] == SLOT_EMPTY) { 1677 brelse(bp); 1678 goto out; 1679 } 1680 /* 1681 * Skip deleted entries. 1682 */ 1683 if (dentp->deName[0] == SLOT_DELETED) { 1684 chksum = -1; 1685 continue; 1686 } 1687 1688 /* 1689 * Handle Win95 long directory entries 1690 */ 1691 if (dentp->deAttributes == ATTR_WIN95) { 1692 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1693 continue; 1694 chksum = win2unixfn((struct winentry *)dentp, 1695 &dirbuf, chksum, 1696 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1697 pmp->pm_u2w); 1698 continue; 1699 } 1700 1701 /* 1702 * Skip volume labels 1703 */ 1704 if (dentp->deAttributes & ATTR_VOLUME) { 1705 chksum = -1; 1706 continue; 1707 } 1708 /* 1709 * This computation of d_fileno must match 1710 * the computation of va_fileid in 1711 * msdosfs_getattr. 1712 */ 1713 if (dentp->deAttributes & ATTR_DIRECTORY) { 1714 fileno = getushort(dentp->deStartCluster); 1715 if (FAT32(pmp)) 1716 fileno |= getushort(dentp->deHighClust) << 16; 1717 /* if this is the root directory */ 1718 if (fileno == MSDOSFSROOT) 1719 if (FAT32(pmp)) 1720 fileno = cntobn(pmp, 1721 pmp->pm_rootdirblk) 1722 * dirsperblk; 1723 else 1724 fileno = 1; 1725 else 1726 fileno = cntobn(pmp, fileno) * dirsperblk; 1727 dirbuf.d_fileno = fileno; 1728 dirbuf.d_type = DT_DIR; 1729 } else { 1730 dirbuf.d_fileno = offset / sizeof(struct direntry); 1731 dirbuf.d_type = DT_REG; 1732 } 1733 if (chksum != winChksum(dentp->deName)) 1734 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1735 (u_char *)dirbuf.d_name, 1736 dentp->deLowerCase | 1737 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1738 (LCASE_BASE | LCASE_EXT) : 0), 1739 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1740 pmp->pm_d2u, 1741 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1742 pmp->pm_ul); 1743 else 1744 dirbuf.d_name[dirbuf.d_namlen] = 0; 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((caddr_t) &dirbuf, 1752 dirbuf.d_reclen, uio); 1753 if (error) { 1754 brelse(bp); 1755 goto out; 1756 } 1757 if (cookies) { 1758 *cookies++ = offset + sizeof(struct direntry); 1759 if (--ncookies <= 0) { 1760 brelse(bp); 1761 goto out; 1762 } 1763 } 1764 off = offset + sizeof(struct direntry); 1765 } 1766 brelse(bp); 1767 } 1768 out: 1769 /* Subtract unused cookies */ 1770 if (ap->a_ncookies) 1771 *ap->a_ncookies -= ncookies; 1772 1773 uio->uio_offset = off; 1774 1775 /* 1776 * Set the eofflag (NFS uses it) 1777 */ 1778 if (ap->a_eofflag) { 1779 if (dep->de_FileSize - (offset - bias) <= 0) 1780 *ap->a_eofflag = 1; 1781 else 1782 *ap->a_eofflag = 0; 1783 } 1784 return (error); 1785 } 1786 1787 /* 1788 * vp - address of vnode file the file 1789 * bn - which cluster we are interested in mapping to a filesystem block number. 1790 * vpp - returns the vnode for the block special file holding the filesystem 1791 * containing the file of interest 1792 * bnp - address of where to return the filesystem relative block number 1793 */ 1794 static int 1795 msdosfs_bmap(ap) 1796 struct vop_bmap_args /* { 1797 struct vnode *a_vp; 1798 daddr_t a_bn; 1799 struct vnode **a_vpp; 1800 daddr_t *a_bnp; 1801 int *a_runp; 1802 int *a_runb; 1803 } */ *ap; 1804 { 1805 struct denode *dep = VTODE(ap->a_vp); 1806 1807 if (ap->a_vpp != NULL) 1808 *ap->a_vpp = dep->de_devvp; 1809 if (ap->a_bnp == NULL) 1810 return (0); 1811 if (ap->a_runp) { 1812 /* 1813 * Sequential clusters should be counted here. 1814 */ 1815 *ap->a_runp = 0; 1816 } 1817 if (ap->a_runb) { 1818 *ap->a_runb = 0; 1819 } 1820 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0)); 1821 } 1822 1823 static int 1824 msdosfs_strategy(ap) 1825 struct vop_strategy_args /* { 1826 struct vnode *a_vp; 1827 struct buf *a_bp; 1828 } */ *ap; 1829 { 1830 struct buf *bp = ap->a_bp; 1831 struct denode *dep = VTODE(bp->b_vp); 1832 struct vnode *vp; 1833 int error = 0; 1834 1835 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1836 panic("msdosfs_strategy: spec"); 1837 /* 1838 * If we don't already know the filesystem relative block number 1839 * then get it using pcbmap(). If pcbmap() returns the block 1840 * number as -1 then we've got a hole in the file. DOS filesystems 1841 * don't allow files with holes, so we shouldn't ever see this. 1842 */ 1843 if (bp->b_blkno == bp->b_lblkno) { 1844 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0); 1845 if (error) { 1846 bp->b_error = error; 1847 bp->b_flags |= B_ERROR; 1848 biodone(bp); 1849 return (error); 1850 } 1851 if ((long)bp->b_blkno == -1) 1852 vfs_bio_clrbuf(bp); 1853 } 1854 if (bp->b_blkno == -1) { 1855 biodone(bp); 1856 return (0); 1857 } 1858 /* 1859 * Read/write the block from/to the disk that contains the desired 1860 * file block. 1861 */ 1862 vp = dep->de_devvp; 1863 bp->b_dev = vp->v_rdev; 1864 VOP_STRATEGY(vp, bp); 1865 return (0); 1866 } 1867 1868 static int 1869 msdosfs_print(ap) 1870 struct vop_print_args /* { 1871 struct vnode *vp; 1872 } */ *ap; 1873 { 1874 struct denode *dep = VTODE(ap->a_vp); 1875 1876 printf( 1877 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1878 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1879 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1880 lockmgr_printinfo(&dep->de_lock); 1881 printf("\n"); 1882 return (0); 1883 } 1884 1885 static int 1886 msdosfs_pathconf(ap) 1887 struct vop_pathconf_args /* { 1888 struct vnode *a_vp; 1889 int a_name; 1890 int *a_retval; 1891 } */ *ap; 1892 { 1893 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1894 1895 switch (ap->a_name) { 1896 case _PC_LINK_MAX: 1897 *ap->a_retval = 1; 1898 return (0); 1899 case _PC_NAME_MAX: 1900 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1901 return (0); 1902 case _PC_PATH_MAX: 1903 *ap->a_retval = PATH_MAX; 1904 return (0); 1905 case _PC_CHOWN_RESTRICTED: 1906 *ap->a_retval = 1; 1907 return (0); 1908 case _PC_NO_TRUNC: 1909 *ap->a_retval = 0; 1910 return (0); 1911 default: 1912 return (EINVAL); 1913 } 1914 /* NOTREACHED */ 1915 } 1916 1917 /* 1918 * get page routine 1919 * 1920 * XXX By default, wimp out... note that a_offset is ignored (and always 1921 * XXX has been). 1922 */ 1923 int 1924 msdosfs_getpages(ap) 1925 struct vop_getpages_args *ap; 1926 { 1927 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1928 ap->a_reqpage); 1929 } 1930 1931 /* 1932 * put page routine 1933 * 1934 * XXX By default, wimp out... note that a_offset is ignored (and always 1935 * XXX has been). 1936 */ 1937 int 1938 msdosfs_putpages(ap) 1939 struct vop_putpages_args *ap; 1940 { 1941 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1942 ap->a_sync, ap->a_rtvals); 1943 } 1944 1945 /* Global vfs data structures for msdosfs */ 1946 vop_t **msdosfs_vnodeop_p; 1947 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1948 { &vop_default_desc, (vop_t *) vop_defaultop }, 1949 { &vop_access_desc, (vop_t *) msdosfs_access }, 1950 { &vop_bmap_desc, (vop_t *) msdosfs_bmap }, 1951 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup }, 1952 { &vop_close_desc, (vop_t *) msdosfs_close }, 1953 { &vop_create_desc, (vop_t *) msdosfs_create }, 1954 { &vop_fsync_desc, (vop_t *) msdosfs_fsync }, 1955 { &vop_getattr_desc, (vop_t *) msdosfs_getattr }, 1956 { &vop_inactive_desc, (vop_t *) msdosfs_inactive }, 1957 { &vop_islocked_desc, (vop_t *) vop_stdislocked }, 1958 { &vop_link_desc, (vop_t *) msdosfs_link }, 1959 { &vop_lock_desc, (vop_t *) vop_stdlock }, 1960 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup }, 1961 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir }, 1962 { &vop_mknod_desc, (vop_t *) msdosfs_mknod }, 1963 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf }, 1964 { &vop_print_desc, (vop_t *) msdosfs_print }, 1965 { &vop_read_desc, (vop_t *) msdosfs_read }, 1966 { &vop_readdir_desc, (vop_t *) msdosfs_readdir }, 1967 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim }, 1968 { &vop_remove_desc, (vop_t *) msdosfs_remove }, 1969 { &vop_rename_desc, (vop_t *) msdosfs_rename }, 1970 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir }, 1971 { &vop_setattr_desc, (vop_t *) msdosfs_setattr }, 1972 { &vop_strategy_desc, (vop_t *) msdosfs_strategy }, 1973 { &vop_symlink_desc, (vop_t *) msdosfs_symlink }, 1974 { &vop_unlock_desc, (vop_t *) vop_stdunlock }, 1975 { &vop_write_desc, (vop_t *) msdosfs_write }, 1976 { &vop_getpages_desc, (vop_t *) msdosfs_getpages }, 1977 { &vop_putpages_desc, (vop_t *) msdosfs_putpages }, 1978 { NULL, NULL } 1979 }; 1980 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1981 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1982 1983 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 1984