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 1.24 2005/04/15 19:08:19 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. 129 * 130 * msdosfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 131 * struct componentname *a_cnp, struct vattr *a_vap) 132 */ 133 static int 134 msdosfs_create(struct vop_create_args *ap) 135 { 136 struct componentname *cnp = ap->a_cnp; 137 struct denode ndirent; 138 struct denode *dep; 139 struct denode *pdep = VTODE(ap->a_dvp); 140 struct timespec ts; 141 int error; 142 143 #ifdef MSDOSFS_DEBUG 144 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 145 #endif 146 147 /* 148 * If this is the root directory and there is no space left we 149 * can't do anything. This is because the root directory can not 150 * change size. 151 */ 152 if (pdep->de_StartCluster == MSDOSFSROOT 153 && pdep->de_fndoffset >= pdep->de_FileSize) { 154 error = ENOSPC; 155 goto bad; 156 } 157 158 /* 159 * Create a directory entry for the file, then call createde() to 160 * have it installed. NOTE: DOS files are always executable. We 161 * use the absence of the owner write bit to make the file 162 * readonly. 163 */ 164 bzero(&ndirent, sizeof(ndirent)); 165 error = uniqdosname(pdep, cnp, ndirent.de_Name); 166 if (error) 167 goto bad; 168 169 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 170 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 171 ndirent.de_LowerCase = 0; 172 ndirent.de_StartCluster = 0; 173 ndirent.de_FileSize = 0; 174 ndirent.de_dev = pdep->de_dev; 175 ndirent.de_devvp = pdep->de_devvp; 176 ndirent.de_pmp = pdep->de_pmp; 177 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 178 getnanotime(&ts); 179 DETIMES(&ndirent, &ts, &ts, &ts); 180 error = createde(&ndirent, pdep, &dep, cnp); 181 if (error) 182 goto bad; 183 *ap->a_vpp = DETOV(dep); 184 return (0); 185 186 bad: 187 return (error); 188 } 189 190 /* 191 * msdosfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, 192 * struct componentname *a_cnp, struct vattr *a_vap) 193 */ 194 static int 195 msdosfs_mknod(struct vop_mknod_args *ap) 196 { 197 switch (ap->a_vap->va_type) { 198 case VDIR: 199 return (msdosfs_mkdir((struct vop_mkdir_args *)ap)); 200 break; 201 202 case VREG: 203 return (msdosfs_create((struct vop_create_args *)ap)); 204 break; 205 206 default: 207 return (EINVAL); 208 } 209 /* NOTREACHED */ 210 } 211 212 /* 213 * msdosfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, 214 * struct thread *a_td) 215 */ 216 static int 217 msdosfs_close(struct vop_close_args *ap) 218 { 219 struct vnode *vp = ap->a_vp; 220 struct denode *dep = VTODE(vp); 221 struct timespec ts; 222 223 if (vp->v_usecount > 1) { 224 getnanotime(&ts); 225 if (vp->v_usecount > 1) { 226 DETIMES(dep, &ts, &ts, &ts); 227 } 228 } 229 return 0; 230 } 231 232 /* 233 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 234 * struct thread *a_td) 235 */ 236 static int 237 msdosfs_access(struct vop_access_args *ap) 238 { 239 struct vnode *vp = ap->a_vp; 240 struct denode *dep = VTODE(ap->a_vp); 241 struct msdosfsmount *pmp = dep->de_pmp; 242 struct ucred *cred = ap->a_cred; 243 mode_t mask, file_mode, mode = ap->a_mode; 244 gid_t *gp; 245 int i; 246 247 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 248 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 249 file_mode &= pmp->pm_mask; 250 251 /* 252 * Disallow write attempts on read-only file systems; 253 * unless the file is a socket, fifo, or a block or 254 * character device resident on the file system. 255 */ 256 if (mode & VWRITE) { 257 switch (vp->v_type) { 258 case VDIR: 259 case VLNK: 260 case VREG: 261 if (vp->v_mount->mnt_flag & MNT_RDONLY) 262 return (EROFS); 263 break; 264 default: 265 break; 266 } 267 } 268 269 /* User id 0 always gets access. */ 270 if (cred->cr_uid == 0) 271 return 0; 272 273 mask = 0; 274 275 /* Otherwise, check the owner. */ 276 if (cred->cr_uid == pmp->pm_uid) { 277 if (mode & VEXEC) 278 mask |= S_IXUSR; 279 if (mode & VREAD) 280 mask |= S_IRUSR; 281 if (mode & VWRITE) 282 mask |= S_IWUSR; 283 return (file_mode & mask) == mask ? 0 : EACCES; 284 } 285 286 /* Otherwise, check the groups. */ 287 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 288 if (pmp->pm_gid == *gp) { 289 if (mode & VEXEC) 290 mask |= S_IXGRP; 291 if (mode & VREAD) 292 mask |= S_IRGRP; 293 if (mode & VWRITE) 294 mask |= S_IWGRP; 295 return (file_mode & mask) == mask ? 0 : EACCES; 296 } 297 298 /* Otherwise, check everyone else. */ 299 if (mode & VEXEC) 300 mask |= S_IXOTH; 301 if (mode & VREAD) 302 mask |= S_IROTH; 303 if (mode & VWRITE) 304 mask |= S_IWOTH; 305 return (file_mode & mask) == mask ? 0 : EACCES; 306 } 307 308 /* 309 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap, 310 * struct ucred *a_cred, struct thread *a_td) 311 */ 312 static int 313 msdosfs_getattr(struct vop_getattr_args *ap) 314 { 315 struct denode *dep = VTODE(ap->a_vp); 316 struct msdosfsmount *pmp = dep->de_pmp; 317 struct vattr *vap = ap->a_vap; 318 mode_t mode; 319 struct timespec ts; 320 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 321 u_long fileid; 322 323 getnanotime(&ts); 324 DETIMES(dep, &ts, &ts, &ts); 325 vap->va_fsid = dev2udev(dep->de_dev); 326 /* 327 * The following computation of the fileid must be the same as that 328 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 329 * doesn't work. 330 */ 331 if (dep->de_Attributes & ATTR_DIRECTORY) { 332 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk; 333 if (dep->de_StartCluster == MSDOSFSROOT) 334 fileid = 1; 335 } else { 336 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk; 337 if (dep->de_dirclust == MSDOSFSROOT) 338 fileid = roottobn(pmp, 0) * dirsperblk; 339 fileid += dep->de_diroffset / sizeof(struct direntry); 340 } 341 vap->va_fileid = fileid; 342 if ((dep->de_Attributes & ATTR_READONLY) == 0) 343 mode = S_IRWXU|S_IRWXG|S_IRWXO; 344 else 345 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 346 vap->va_mode = mode & pmp->pm_mask; 347 vap->va_uid = pmp->pm_uid; 348 vap->va_gid = pmp->pm_gid; 349 vap->va_nlink = 1; 350 vap->va_rdev = 0; 351 vap->va_size = dep->de_FileSize; 352 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 353 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 354 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 355 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 356 } else { 357 vap->va_atime = vap->va_mtime; 358 vap->va_ctime = vap->va_mtime; 359 } 360 vap->va_flags = 0; 361 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 362 vap->va_flags |= SF_ARCHIVED; 363 vap->va_gen = 0; 364 vap->va_blocksize = pmp->pm_bpcluster; 365 vap->va_bytes = 366 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 367 vap->va_type = ap->a_vp->v_type; 368 vap->va_filerev = dep->de_modrev; 369 return (0); 370 } 371 372 /* 373 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap, 374 * struct ucred *a_cred, struct thread *a_td) 375 */ 376 static int 377 msdosfs_setattr(struct vop_setattr_args *ap) 378 { 379 struct vnode *vp = ap->a_vp; 380 struct denode *dep = VTODE(ap->a_vp); 381 struct msdosfsmount *pmp = dep->de_pmp; 382 struct vattr *vap = ap->a_vap; 383 struct ucred *cred = ap->a_cred; 384 int error = 0; 385 386 #ifdef MSDOSFS_DEBUG 387 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 388 ap->a_vp, vap, cred, ap->a_td); 389 #endif 390 391 /* 392 * Check for unsettable attributes. 393 */ 394 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 395 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 396 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 397 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 398 #ifdef MSDOSFS_DEBUG 399 printf("msdosfs_setattr(): returning EINVAL\n"); 400 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 401 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 402 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 403 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 404 printf(" va_uid %x, va_gid %x\n", 405 vap->va_uid, vap->va_gid); 406 #endif 407 return (EINVAL); 408 } 409 if (vap->va_flags != VNOVAL) { 410 if (vp->v_mount->mnt_flag & MNT_RDONLY) 411 return (EROFS); 412 if (cred->cr_uid != pmp->pm_uid && 413 (error = suser_cred(cred, PRISON_ROOT))) 414 return (error); 415 /* 416 * We are very inconsistent about handling unsupported 417 * attributes. We ignored the access time and the 418 * read and execute bits. We were strict for the other 419 * attributes. 420 * 421 * Here we are strict, stricter than ufs in not allowing 422 * users to attempt to set SF_SETTABLE bits or anyone to 423 * set unsupported bits. However, we ignore attempts to 424 * set ATTR_ARCHIVE for directories `cp -pr' from a more 425 * sensible file system attempts it a lot. 426 */ 427 if (cred->cr_uid != 0) { 428 if (vap->va_flags & SF_SETTABLE) 429 return EPERM; 430 } 431 if (vap->va_flags & ~SF_ARCHIVED) 432 return EOPNOTSUPP; 433 if (vap->va_flags & SF_ARCHIVED) 434 dep->de_Attributes &= ~ATTR_ARCHIVE; 435 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 436 dep->de_Attributes |= ATTR_ARCHIVE; 437 dep->de_flag |= DE_MODIFIED; 438 } 439 440 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 441 uid_t uid; 442 gid_t gid; 443 444 if (vp->v_mount->mnt_flag & MNT_RDONLY) 445 return (EROFS); 446 uid = vap->va_uid; 447 if (uid == (uid_t)VNOVAL) 448 uid = pmp->pm_uid; 449 gid = vap->va_gid; 450 if (gid == (gid_t)VNOVAL) 451 gid = pmp->pm_gid; 452 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 453 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 454 (error = suser_cred(cred, PRISON_ROOT))) 455 return error; 456 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 457 return EINVAL; 458 } 459 460 if (vap->va_size != VNOVAL) { 461 /* 462 * Disallow write attempts on read-only file systems; 463 * unless the file is a socket, fifo, or a block or 464 * character device resident on the file system. 465 */ 466 switch (vp->v_type) { 467 case VDIR: 468 return (EISDIR); 469 /* NOT REACHED */ 470 case VLNK: 471 case VREG: 472 if (vp->v_mount->mnt_flag & MNT_RDONLY) 473 return (EROFS); 474 break; 475 default: 476 break; 477 } 478 error = detrunc(dep, vap->va_size, 0, ap->a_td); 479 if (error) 480 return error; 481 } 482 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 483 if (vp->v_mount->mnt_flag & MNT_RDONLY) 484 return (EROFS); 485 if (cred->cr_uid != pmp->pm_uid && 486 (error = suser_cred(cred, PRISON_ROOT)) && 487 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 488 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td)))) 489 return (error); 490 if (vp->v_type != VDIR) { 491 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 492 vap->va_atime.tv_sec != VNOVAL) { 493 dep->de_flag &= ~DE_ACCESS; 494 unix2dostime(&vap->va_atime, &dep->de_ADate, 495 NULL, NULL); 496 } 497 if (vap->va_mtime.tv_sec != VNOVAL) { 498 dep->de_flag &= ~DE_UPDATE; 499 unix2dostime(&vap->va_mtime, &dep->de_MDate, 500 &dep->de_MTime, NULL); 501 } 502 dep->de_Attributes |= ATTR_ARCHIVE; 503 dep->de_flag |= DE_MODIFIED; 504 } 505 } 506 /* 507 * DOS files only have the ability to have their writability 508 * attribute set, so we use the owner write bit to set the readonly 509 * attribute. 510 */ 511 if (vap->va_mode != (mode_t)VNOVAL) { 512 if (vp->v_mount->mnt_flag & MNT_RDONLY) 513 return (EROFS); 514 if (cred->cr_uid != pmp->pm_uid && 515 (error = suser_cred(cred, PRISON_ROOT))) 516 return (error); 517 if (vp->v_type != VDIR) { 518 /* We ignore the read and execute bits. */ 519 if (vap->va_mode & VWRITE) 520 dep->de_Attributes &= ~ATTR_READONLY; 521 else 522 dep->de_Attributes |= ATTR_READONLY; 523 dep->de_Attributes |= ATTR_ARCHIVE; 524 dep->de_flag |= DE_MODIFIED; 525 } 526 } 527 return (deupdat(dep, 1)); 528 } 529 530 /* 531 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 532 * struct ucred *a_cred) 533 */ 534 static int 535 msdosfs_read(struct vop_read_args *ap) 536 { 537 int error = 0; 538 int blsize; 539 int isadir; 540 int orig_resid; 541 u_int n; 542 u_long diff; 543 u_long on; 544 daddr_t lbn; 545 daddr_t rablock; 546 int rasize; 547 int seqcount; 548 struct buf *bp; 549 struct vnode *vp = ap->a_vp; 550 struct denode *dep = VTODE(vp); 551 struct msdosfsmount *pmp = dep->de_pmp; 552 struct uio *uio = ap->a_uio; 553 554 if (uio->uio_offset < 0) 555 return (EINVAL); 556 557 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 558 return (0); 559 /* 560 * If they didn't ask for any data, then we are done. 561 */ 562 orig_resid = uio->uio_resid; 563 if (orig_resid <= 0) 564 return (0); 565 566 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 567 568 isadir = dep->de_Attributes & ATTR_DIRECTORY; 569 do { 570 if (uio->uio_offset >= dep->de_FileSize) 571 break; 572 lbn = de_cluster(pmp, uio->uio_offset); 573 /* 574 * If we are operating on a directory file then be sure to 575 * do i/o with the vnode for the filesystem instead of the 576 * vnode for the directory. 577 */ 578 if (isadir) { 579 /* convert cluster # to block # */ 580 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 581 if (error == E2BIG) { 582 error = EINVAL; 583 break; 584 } else if (error) 585 break; 586 error = bread(pmp->pm_devvp, lbn, blsize, &bp); 587 } else { 588 blsize = pmp->pm_bpcluster; 589 rablock = lbn + 1; 590 if (seqcount > 1 && 591 de_cn2off(pmp, rablock) < dep->de_FileSize) { 592 rasize = pmp->pm_bpcluster; 593 error = breadn(vp, lbn, blsize, 594 &rablock, &rasize, 1, &bp); 595 } else { 596 error = bread(vp, lbn, blsize, &bp); 597 } 598 } 599 if (error) { 600 brelse(bp); 601 break; 602 } 603 on = uio->uio_offset & pmp->pm_crbomask; 604 diff = pmp->pm_bpcluster - on; 605 n = diff > uio->uio_resid ? uio->uio_resid : diff; 606 diff = dep->de_FileSize - uio->uio_offset; 607 if (diff < n) 608 n = diff; 609 diff = blsize - bp->b_resid; 610 if (diff < n) 611 n = diff; 612 error = uiomove(bp->b_data + on, (int) n, uio); 613 brelse(bp); 614 } while (error == 0 && uio->uio_resid > 0 && n != 0); 615 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 616 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 617 dep->de_flag |= DE_ACCESS; 618 return (error); 619 } 620 621 /* 622 * Write data to a file or directory. 623 * 624 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 625 * struct ucred *a_cred) 626 */ 627 static int 628 msdosfs_write(struct vop_write_args *ap) 629 { 630 int n; 631 int croffset; 632 int resid; 633 u_long osize; 634 int error = 0; 635 u_long count; 636 daddr_t bn, lastcn; 637 struct buf *bp; 638 int ioflag = ap->a_ioflag; 639 struct uio *uio = ap->a_uio; 640 struct thread *td = uio->uio_td; 641 struct vnode *vp = ap->a_vp; 642 struct vnode *thisvp; 643 struct denode *dep = VTODE(vp); 644 struct msdosfsmount *pmp = dep->de_pmp; 645 struct proc *p = (td ? td->td_proc : NULL); 646 647 #ifdef MSDOSFS_DEBUG 648 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 649 vp, uio, ioflag, cred); 650 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 651 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 652 #endif 653 654 switch (vp->v_type) { 655 case VREG: 656 if (ioflag & IO_APPEND) 657 uio->uio_offset = dep->de_FileSize; 658 thisvp = vp; 659 break; 660 case VDIR: 661 return EISDIR; 662 default: 663 panic("msdosfs_write(): bad file type"); 664 } 665 666 if (uio->uio_offset < 0) 667 return (EFBIG); 668 669 if (uio->uio_resid == 0) 670 return (0); 671 672 /* 673 * If they've exceeded their filesize limit, tell them about it. 674 */ 675 if (p && 676 ((uoff_t)uio->uio_offset + uio->uio_resid > 677 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 678 psignal(p, SIGXFSZ); 679 return (EFBIG); 680 } 681 682 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 683 return (EFBIG); 684 685 /* 686 * If the offset we are starting the write at is beyond the end of 687 * the file, then they've done a seek. Unix filesystems allow 688 * files with holes in them, DOS doesn't so we must fill the hole 689 * with zeroed blocks. 690 */ 691 if (uio->uio_offset > dep->de_FileSize) { 692 error = deextend(dep, uio->uio_offset); 693 if (error) 694 return (error); 695 } 696 697 /* 698 * Remember some values in case the write fails. 699 */ 700 resid = uio->uio_resid; 701 osize = dep->de_FileSize; 702 703 /* 704 * If we write beyond the end of the file, extend it to its ultimate 705 * size ahead of the time to hopefully get a contiguous area. 706 */ 707 if (uio->uio_offset + resid > osize) { 708 count = de_clcount(pmp, uio->uio_offset + resid) - 709 de_clcount(pmp, osize); 710 error = extendfile(dep, count, NULL, NULL, 0); 711 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 712 goto errexit; 713 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 714 } else 715 lastcn = de_clcount(pmp, osize) - 1; 716 717 do { 718 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 719 error = ENOSPC; 720 break; 721 } 722 723 croffset = uio->uio_offset & pmp->pm_crbomask; 724 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 725 if (uio->uio_offset + n > dep->de_FileSize) { 726 dep->de_FileSize = uio->uio_offset + n; 727 /* The object size needs to be set before buffer is allocated */ 728 vnode_pager_setsize(vp, dep->de_FileSize); 729 } 730 731 bn = de_cluster(pmp, uio->uio_offset); 732 if ((uio->uio_offset & pmp->pm_crbomask) == 0 733 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 734 > de_cluster(pmp, uio->uio_offset) 735 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 736 /* 737 * If either the whole cluster gets written, 738 * or we write the cluster from its start beyond EOF, 739 * then no need to read data from disk. 740 */ 741 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 742 clrbuf(bp); 743 /* 744 * Do the bmap now, since pcbmap needs buffers 745 * for the fat table. (see msdosfs_strategy) 746 */ 747 if (bp->b_blkno == bp->b_lblkno) { 748 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 749 0, 0); 750 if (error) 751 bp->b_blkno = -1; 752 } 753 if (bp->b_blkno == -1) { 754 brelse(bp); 755 if (!error) 756 error = EIO; /* XXX */ 757 break; 758 } 759 } else { 760 /* 761 * The block we need to write into exists, so read it in. 762 */ 763 error = bread(thisvp, bn, pmp->pm_bpcluster, &bp); 764 if (error) { 765 brelse(bp); 766 break; 767 } 768 } 769 770 /* 771 * Should these vnode_pager_* functions be done on dir 772 * files? 773 */ 774 775 /* 776 * Copy the data from user space into the buf header. 777 */ 778 error = uiomove(bp->b_data + croffset, n, uio); 779 if (error) { 780 brelse(bp); 781 break; 782 } 783 784 /* 785 * If they want this synchronous then write it and wait for 786 * it. Otherwise, if on a cluster boundary write it 787 * asynchronously so we can move on to the next block 788 * without delay. Otherwise do a delayed write because we 789 * may want to write somemore into the block later. 790 */ 791 if (ioflag & IO_SYNC) 792 (void) bwrite(bp); 793 else if (n + croffset == pmp->pm_bpcluster) 794 bawrite(bp); 795 else 796 bdwrite(bp); 797 dep->de_flag |= DE_UPDATE; 798 } while (error == 0 && uio->uio_resid > 0); 799 800 /* 801 * If the write failed and they want us to, truncate the file back 802 * to the size it was before the write was attempted. 803 */ 804 errexit: 805 if (error) { 806 if (ioflag & IO_UNIT) { 807 detrunc(dep, osize, ioflag & IO_SYNC, NULL); 808 uio->uio_offset -= resid - uio->uio_resid; 809 uio->uio_resid = resid; 810 } else { 811 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NULL); 812 if (uio->uio_resid != resid) 813 error = 0; 814 } 815 } else if (ioflag & IO_SYNC) 816 error = deupdat(dep, 1); 817 return (error); 818 } 819 820 /* 821 * Flush the blocks of a file to disk. 822 * 823 * This function is worthless for vnodes that represent directories. Maybe we 824 * could just do a sync if they try an fsync on a directory file. 825 * 826 * msdosfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor, 827 * struct thread *a_td) 828 */ 829 static int 830 msdosfs_fsync(struct vop_fsync_args *ap) 831 { 832 struct vnode *vp = ap->a_vp; 833 834 /* 835 * Flush all dirty buffers associated with a vnode. 836 */ 837 #ifdef DIAGNOSTIC 838 loop: 839 #endif 840 vfsync(vp, ap->a_waitfor, 0, (daddr_t)-1, NULL, NULL); 841 #ifdef DIAGNOSTIC 842 if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) { 843 vprint("msdosfs_fsync: dirty", vp); 844 goto loop; 845 } 846 #endif 847 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 848 } 849 850 /* 851 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 852 * struct componentname *a_cnp) 853 */ 854 static int 855 msdosfs_remove(struct vop_remove_args *ap) 856 { 857 struct denode *dep = VTODE(ap->a_vp); 858 struct denode *ddep = VTODE(ap->a_dvp); 859 int error; 860 861 if (ap->a_vp->v_type == VDIR) 862 error = EPERM; 863 else 864 error = removede(ddep, dep); 865 #ifdef MSDOSFS_DEBUG 866 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 867 #endif 868 return (error); 869 } 870 871 /* 872 * DOS filesystems don't know what links are. But since we already called 873 * msdosfs_lookup() with create and lockparent, the parent is locked so we 874 * have to free it before we return the error. 875 * 876 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 877 * struct componentname *a_cnp) 878 */ 879 static int 880 msdosfs_link(struct vop_link_args *ap) 881 { 882 return (EOPNOTSUPP); 883 } 884 885 /* 886 * Renames on files require moving the denode to a new hash queue since the 887 * denode's location is used to compute which hash queue to put the file 888 * in. Unless it is a rename in place. For example "mv a b". 889 * 890 * What follows is the basic algorithm: 891 * 892 * if (file move) { 893 * if (dest file exists) { 894 * remove dest file 895 * } 896 * if (dest and src in same directory) { 897 * rewrite name in existing directory slot 898 * } else { 899 * write new entry in dest directory 900 * update offset and dirclust in denode 901 * move denode to new hash chain 902 * clear old directory entry 903 * } 904 * } else { 905 * directory move 906 * if (dest directory exists) { 907 * if (dest is not empty) { 908 * return ENOTEMPTY 909 * } 910 * remove dest directory 911 * } 912 * if (dest and src in same directory) { 913 * rewrite name in existing entry 914 * } else { 915 * be sure dest is not a child of src directory 916 * write entry in dest directory 917 * update "." and ".." in moved directory 918 * clear old directory entry for moved directory 919 * } 920 * } 921 * 922 * On entry: 923 * source's parent directory is unlocked 924 * source file or directory is unlocked 925 * destination's parent directory is locked 926 * destination file or directory is locked if it exists 927 * 928 * On exit: 929 * all denodes should be released 930 * 931 * Notes: 932 * I'm not sure how the memory containing the pathnames pointed at by the 933 * componentname structures is freed, there may be some memory bleeding 934 * for each rename done. 935 * 936 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 937 * struct componentname *a_fcnp, struct vnode *a_tdvp, 938 * struct vnode *a_tvp, struct componentname *a_tcnp) 939 */ 940 static int 941 msdosfs_rename(struct vop_rename_args *ap) 942 { 943 struct vnode *tdvp = ap->a_tdvp; 944 struct vnode *fvp = ap->a_fvp; 945 struct vnode *fdvp = ap->a_fdvp; 946 struct vnode *tvp = ap->a_tvp; 947 struct componentname *tcnp = ap->a_tcnp; 948 struct componentname *fcnp = ap->a_fcnp; 949 struct thread *td = fcnp->cn_td; 950 struct denode *ip, *xp, *dp, *zp; 951 u_char toname[11], oldname[11]; 952 u_long from_diroffset, to_diroffset; 953 u_char to_count; 954 int doingdirectory = 0, newparent = 0; 955 int error; 956 u_long cn; 957 daddr_t bn; 958 struct denode *fddep; /* from file's parent directory */ 959 struct msdosfsmount *pmp; 960 struct direntry *dotdotp; 961 struct buf *bp; 962 963 fddep = VTODE(ap->a_fdvp); 964 pmp = fddep->de_pmp; 965 966 pmp = VFSTOMSDOSFS(fdvp->v_mount); 967 968 /* 969 * Check for cross-device rename. 970 */ 971 if ((fvp->v_mount != tdvp->v_mount) || 972 (tvp && (fvp->v_mount != tvp->v_mount))) { 973 error = EXDEV; 974 abortit: 975 if (tdvp == tvp) 976 vrele(tdvp); 977 else 978 vput(tdvp); 979 if (tvp) 980 vput(tvp); 981 vrele(fdvp); 982 vrele(fvp); 983 return (error); 984 } 985 986 /* 987 * If source and dest are the same, do nothing. 988 */ 989 if (tvp == fvp) { 990 error = 0; 991 goto abortit; 992 } 993 994 /* 995 * fvp, fdvp are unlocked, tvp, tdvp are locked. Lock fvp and note 996 * that we have to unlock it to use the abortit target. 997 */ 998 error = vn_lock(fvp, LK_EXCLUSIVE, td); 999 if (error) 1000 goto abortit; 1001 dp = VTODE(fdvp); 1002 ip = VTODE(fvp); 1003 1004 /* 1005 * Be sure we are not renaming ".", "..", or an alias of ".". This 1006 * leads to a crippled directory tree. It's pretty tough to do a 1007 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1008 * doesn't work if the ".." entry is missing. 1009 */ 1010 if (ip->de_Attributes & ATTR_DIRECTORY) { 1011 /* 1012 * Avoid ".", "..", and aliases of "." for obvious reasons. 1013 */ 1014 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1015 dp == ip || 1016 (fcnp->cn_flags & CNP_ISDOTDOT) || 1017 (tcnp->cn_flags & CNP_ISDOTDOT) || 1018 (ip->de_flag & DE_RENAME)) { 1019 VOP_UNLOCK(fvp, 0, td); 1020 error = EINVAL; 1021 goto abortit; 1022 } 1023 ip->de_flag |= DE_RENAME; 1024 doingdirectory++; 1025 } 1026 1027 /* 1028 * fvp locked, fdvp unlocked, tvp, tdvp locked. DE_RENAME only 1029 * set if doingdirectory. We will get fvp unlocked in fairly 1030 * short order. dp and xp must be setup and fvp must be unlocked 1031 * for the out and bad targets to work properly. 1032 */ 1033 dp = VTODE(tdvp); 1034 xp = tvp ? VTODE(tvp) : NULL; 1035 1036 /* 1037 * Remember direntry place to use for destination 1038 */ 1039 to_diroffset = dp->de_fndoffset; 1040 to_count = dp->de_fndcnt; 1041 1042 /* 1043 * If ".." must be changed (ie the directory gets a new 1044 * parent) then the source directory must not be in the 1045 * directory heirarchy above the target, as this would 1046 * orphan everything below the source directory. Also 1047 * the user must have write permission in the source so 1048 * as to be able to change "..". We must repeat the call 1049 * to namei, as the parent directory is unlocked by the 1050 * call to doscheckpath(). 1051 */ 1052 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_td); 1053 VOP_UNLOCK(fvp, 0, td); 1054 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1055 newparent = 1; 1056 1057 /* 1058 * ok. fvp, fdvp unlocked, tvp, tdvp locked. tvp may be NULL. 1059 * DE_RENAME only set if doingdirectory. 1060 */ 1061 if (doingdirectory && newparent) { 1062 if (error) /* write access check above */ 1063 goto bad; 1064 if (xp != NULL) { 1065 vput(tvp); 1066 xp = NULL; 1067 } 1068 /* 1069 * checkpath vput's tdvp (VTOI(dp)) on return no matter what, 1070 * get an extra ref so we wind up with just an unlocked, ref'd 1071 * tdvp. The 'out' target skips tvp and tdvp cleanups (tdvp 1072 * isn't locked so we can't use the out target). 1073 */ 1074 vref(tdvp); 1075 error = doscheckpath(ip, dp); 1076 tcnp->cn_flags |= CNP_PDIRUNLOCK; 1077 if (error) { 1078 vrele(tdvp); 1079 goto out; 1080 } 1081 /* 1082 * relookup no longer messes with the ref count. tdvp must 1083 * be unlocked on entry and on success will be locked on 1084 * return. 1085 */ 1086 error = relookup(tdvp, &tvp, tcnp); 1087 if (error) { 1088 if (tcnp->cn_flags & CNP_PDIRUNLOCK) 1089 vrele(tdvp); 1090 else 1091 vput(tdvp); 1092 goto out; 1093 } 1094 1095 /* 1096 * tvp and tdvp are now locked again. 1097 */ 1098 dp = VTODE(tdvp); 1099 xp = tvp ? VTODE(tvp) : NULL; 1100 } 1101 1102 /* 1103 * tvp and tdvp are now locked again, the 'bad' target can be used 1104 * to clean them up again. Delete an existant target and clean 1105 * up tvp. Set xp to NULL to indicate that tvp has been cleaned up. 1106 */ 1107 if (xp != NULL) { 1108 /* 1109 * Target must be empty if a directory and have no links 1110 * to it. Also, ensure source and target are compatible 1111 * (both directories, or both not directories). 1112 */ 1113 if (xp->de_Attributes & ATTR_DIRECTORY) { 1114 if (!dosdirempty(xp)) { 1115 error = ENOTEMPTY; 1116 goto bad; 1117 } 1118 if (!doingdirectory) { 1119 error = ENOTDIR; 1120 goto bad; 1121 } 1122 } else if (doingdirectory) { 1123 error = EISDIR; 1124 goto bad; 1125 } 1126 error = removede(dp, xp); 1127 if (error) 1128 goto bad; 1129 vput(tvp); 1130 xp = NULL; 1131 tvp = NULL; 1132 } 1133 1134 /* 1135 * Convert the filename in tcnp into a dos filename. We copy this 1136 * into the denode and directory entry for the destination 1137 * file/directory. 1138 */ 1139 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1140 if (error) 1141 goto bad; 1142 1143 /* 1144 * Since from wasn't locked at various places above, we have to do 1145 * a relookup here. If the target and source are the same directory 1146 * we have to unlock the target directory in order to safely relookup 1147 * the source, because relookup expects its directory to be unlocked. 1148 * 1149 * Note that ap->a_fvp is still valid and ref'd. Any cleanup must 1150 * now take that into account. 1151 * 1152 * The tdvp locking issues make this a real mess. 1153 */ 1154 fcnp->cn_flags &= ~CNP_MODMASK; 1155 fcnp->cn_flags |= CNP_LOCKPARENT; 1156 if (newparent == 0) 1157 VOP_UNLOCK(tdvp, 0, td); 1158 error = relookup(fdvp, &fvp, fcnp); 1159 if (error || fvp == NULL) { 1160 /* 1161 * From name has disappeared. Note: fdvp might == tdvp. 1162 * 1163 * DE_RENAME is only set if doingdirectory. 1164 */ 1165 if (doingdirectory) 1166 panic("rename: lost dir entry"); 1167 if (fcnp->cn_flags & CNP_PDIRUNLOCK) 1168 vrele(fdvp); 1169 else 1170 vput(fdvp); 1171 if (newparent == 0) 1172 vrele(tdvp); 1173 else 1174 vput(tdvp); 1175 vrele(ap->a_fvp); 1176 return(0); 1177 } 1178 1179 /* 1180 * No error occured. tdvp, fdvp and fvp are all locked. If 1181 * newparent was 0 be aware that fdvp == tdvp. tvp has been cleaned 1182 * up. ap->a_fvp is still refd. 1183 */ 1184 xp = VTODE(fvp); 1185 zp = VTODE(fdvp); 1186 from_diroffset = zp->de_fndoffset; 1187 1188 /* 1189 * Ensure that the directory entry still exists and has not 1190 * changed till now. If the source is a file the entry may 1191 * have been unlinked or renamed. In either case there is 1192 * no further work to be done. If the source is a directory 1193 * then it cannot have been rmdir'ed or renamed; this is 1194 * prohibited by the DE_RENAME flag. 1195 * 1196 * DE_RENAME is only set if doingdirectory. 1197 */ 1198 if (xp != ip) { 1199 if (doingdirectory) 1200 panic("rename: lost dir entry"); 1201 goto done; 1202 } else { 1203 u_long new_dirclust; 1204 u_long new_diroffset; 1205 1206 /* 1207 * First write a new entry in the destination 1208 * directory and mark the entry in the source directory 1209 * as deleted. Then move the denode to the correct hash 1210 * chain for its new location in the filesystem. And, if 1211 * we moved a directory, then update its .. entry to point 1212 * to the new parent directory. 1213 */ 1214 bcopy(ip->de_Name, oldname, 11); 1215 bcopy(toname, ip->de_Name, 11); /* update denode */ 1216 dp->de_fndoffset = to_diroffset; 1217 dp->de_fndcnt = to_count; 1218 error = createde(ip, dp, (struct denode **)0, tcnp); 1219 if (error) { 1220 bcopy(oldname, ip->de_Name, 11); 1221 goto done; 1222 } 1223 ip->de_refcnt++; 1224 zp->de_fndoffset = from_diroffset; 1225 error = removede(zp, ip); 1226 if (error) { 1227 /* XXX should really panic here, fs is corrupt */ 1228 goto done; 1229 } 1230 if (!doingdirectory) { 1231 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1232 &new_dirclust, 0); 1233 if (error) { 1234 /* XXX should really panic here, fs is corrupt */ 1235 goto done; 1236 } 1237 if (new_dirclust == MSDOSFSROOT) 1238 new_diroffset = to_diroffset; 1239 else 1240 new_diroffset = to_diroffset & pmp->pm_crbomask; 1241 msdosfs_reinsert(ip, new_dirclust, new_diroffset); 1242 } 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 } 1257 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, &bp); 1258 if (error) { 1259 /* XXX should really panic here, fs is corrupt */ 1260 brelse(bp); 1261 goto done; 1262 } 1263 dotdotp = (struct direntry *)bp->b_data + 1; 1264 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1265 if (FAT32(pmp)) 1266 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1267 error = bwrite(bp); 1268 if (error) { 1269 /* XXX should really panic here, fs is corrupt */ 1270 goto done; 1271 } 1272 } 1273 1274 /* 1275 * done case fvp, fdvp, tdvp are locked. ap->a_fvp is refd 1276 */ 1277 done: 1278 if (doingdirectory) 1279 ip->de_flag &= ~DE_RENAME; /* XXX fvp not locked */ 1280 vput(fvp); 1281 if (newparent) 1282 vput(fdvp); 1283 else 1284 vrele(fdvp); 1285 vput(tdvp); 1286 vrele(ap->a_fvp); 1287 return (error); 1288 1289 /* 1290 * 'bad' target: xp governs tvp. tvp and tdvp arel ocked, fdvp and fvp 1291 * are not locked. ip points to fvp's inode which may have DE_RENAME 1292 * set. 1293 */ 1294 bad: 1295 if (xp) 1296 vput(tvp); 1297 vput(tdvp); 1298 out: 1299 /* 1300 * 'out' target: tvp and tdvp have already been cleaned up. 1301 */ 1302 if (doingdirectory) 1303 ip->de_flag &= ~DE_RENAME; 1304 vrele(fdvp); 1305 vrele(fvp); 1306 return (error); 1307 1308 } 1309 1310 static struct { 1311 struct direntry dot; 1312 struct direntry dotdot; 1313 } dosdirtemplate = { 1314 { ". ", " ", /* the . entry */ 1315 ATTR_DIRECTORY, /* file attribute */ 1316 0, /* reserved */ 1317 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1318 { 0, 0 }, /* access date */ 1319 { 0, 0 }, /* high bits of start cluster */ 1320 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1321 { 0, 0 }, /* startcluster */ 1322 { 0, 0, 0, 0 } /* filesize */ 1323 }, 1324 { ".. ", " ", /* the .. entry */ 1325 ATTR_DIRECTORY, /* file attribute */ 1326 0, /* reserved */ 1327 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1328 { 0, 0 }, /* access date */ 1329 { 0, 0 }, /* high bits of start cluster */ 1330 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1331 { 0, 0 }, /* startcluster */ 1332 { 0, 0, 0, 0 } /* filesize */ 1333 } 1334 }; 1335 1336 /* 1337 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 1338 * struct componentname *a_cnp, struct vattr *a_vap) 1339 */ 1340 static int 1341 msdosfs_mkdir(struct vop_mkdir_args *ap) 1342 { 1343 struct componentname *cnp = ap->a_cnp; 1344 struct denode *dep; 1345 struct denode *pdep = VTODE(ap->a_dvp); 1346 struct direntry *denp; 1347 struct msdosfsmount *pmp = pdep->de_pmp; 1348 struct buf *bp; 1349 u_long newcluster, pcl; 1350 int bn; 1351 int error; 1352 struct denode ndirent; 1353 struct timespec ts; 1354 1355 /* 1356 * If this is the root directory and there is no space left we 1357 * can't do anything. This is because the root directory can not 1358 * change size. 1359 */ 1360 if (pdep->de_StartCluster == MSDOSFSROOT 1361 && pdep->de_fndoffset >= pdep->de_FileSize) { 1362 error = ENOSPC; 1363 goto bad2; 1364 } 1365 1366 /* 1367 * Allocate a cluster to hold the about to be created directory. 1368 */ 1369 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1370 if (error) 1371 goto bad2; 1372 1373 bzero(&ndirent, sizeof(ndirent)); 1374 ndirent.de_pmp = pmp; 1375 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1376 getnanotime(&ts); 1377 DETIMES(&ndirent, &ts, &ts, &ts); 1378 1379 /* 1380 * Now fill the cluster with the "." and ".." entries. And write 1381 * the cluster to disk. This way it is there for the parent 1382 * directory to be pointing at if there were a crash. 1383 */ 1384 bn = cntobn(pmp, newcluster); 1385 /* always succeeds */ 1386 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1387 bzero(bp->b_data, pmp->pm_bpcluster); 1388 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1389 denp = (struct direntry *)bp->b_data; 1390 putushort(denp[0].deStartCluster, newcluster); 1391 putushort(denp[0].deCDate, ndirent.de_CDate); 1392 putushort(denp[0].deCTime, ndirent.de_CTime); 1393 denp[0].deCHundredth = ndirent.de_CHun; 1394 putushort(denp[0].deADate, ndirent.de_ADate); 1395 putushort(denp[0].deMDate, ndirent.de_MDate); 1396 putushort(denp[0].deMTime, ndirent.de_MTime); 1397 pcl = pdep->de_StartCluster; 1398 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1399 pcl = 0; 1400 putushort(denp[1].deStartCluster, pcl); 1401 putushort(denp[1].deCDate, ndirent.de_CDate); 1402 putushort(denp[1].deCTime, ndirent.de_CTime); 1403 denp[1].deCHundredth = ndirent.de_CHun; 1404 putushort(denp[1].deADate, ndirent.de_ADate); 1405 putushort(denp[1].deMDate, ndirent.de_MDate); 1406 putushort(denp[1].deMTime, ndirent.de_MTime); 1407 if (FAT32(pmp)) { 1408 putushort(denp[0].deHighClust, newcluster >> 16); 1409 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1410 } 1411 1412 error = bwrite(bp); 1413 if (error) 1414 goto bad; 1415 1416 /* 1417 * Now build up a directory entry pointing to the newly allocated 1418 * cluster. This will be written to an empty slot in the parent 1419 * directory. 1420 */ 1421 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1422 if (error) 1423 goto bad; 1424 1425 ndirent.de_Attributes = ATTR_DIRECTORY; 1426 ndirent.de_LowerCase = 0; 1427 ndirent.de_StartCluster = newcluster; 1428 ndirent.de_FileSize = 0; 1429 ndirent.de_dev = pdep->de_dev; 1430 ndirent.de_devvp = pdep->de_devvp; 1431 error = createde(&ndirent, pdep, &dep, cnp); 1432 if (error) 1433 goto bad; 1434 *ap->a_vpp = DETOV(dep); 1435 return (0); 1436 1437 bad: 1438 clusterfree(pmp, newcluster, NULL); 1439 bad2: 1440 return (error); 1441 } 1442 1443 /* 1444 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 1445 * struct componentname *a_cnp) 1446 */ 1447 static int 1448 msdosfs_rmdir(struct vop_rmdir_args *ap) 1449 { 1450 struct vnode *vp = ap->a_vp; 1451 struct vnode *dvp = ap->a_dvp; 1452 struct componentname *cnp = ap->a_cnp; 1453 struct denode *ip, *dp; 1454 struct thread *td = cnp->cn_td; 1455 int error; 1456 1457 ip = VTODE(vp); 1458 dp = VTODE(dvp); 1459 1460 /* 1461 * Verify the directory is empty (and valid). 1462 * (Rmdir ".." won't be valid since 1463 * ".." will contain a reference to 1464 * the current directory and thus be 1465 * non-empty.) 1466 */ 1467 error = 0; 1468 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1469 error = ENOTEMPTY; 1470 goto out; 1471 } 1472 /* 1473 * Delete the entry from the directory. For dos filesystems this 1474 * gets rid of the directory entry on disk, the in memory copy 1475 * still exists but the de_refcnt is <= 0. This prevents it from 1476 * being found by deget(). When the vput() on dep is done we give 1477 * up access and eventually msdosfs_reclaim() will be called which 1478 * will remove it from the denode cache. 1479 */ 1480 error = removede(dp, ip); 1481 if (error) 1482 goto out; 1483 /* 1484 * This is where we decrement the link count in the parent 1485 * directory. Since dos filesystems don't do this we just purge 1486 * the name cache. 1487 */ 1488 VOP_UNLOCK(dvp, 0, td); 1489 /* 1490 * Truncate the directory that is being deleted. 1491 */ 1492 error = detrunc(ip, (u_long)0, IO_SYNC, td); 1493 1494 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 1495 out: 1496 return (error); 1497 } 1498 1499 /* 1500 * DOS filesystems don't know what symlinks are. 1501 * 1502 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 1503 * struct componentname *a_cnp, struct vattr *a_vap, 1504 * char *a_target) 1505 */ 1506 static int 1507 msdosfs_symlink(struct vop_symlink_args *ap) 1508 { 1509 return (EOPNOTSUPP); 1510 } 1511 1512 /* 1513 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio, 1514 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies, 1515 * u_long **a_cookies) 1516 */ 1517 static int 1518 msdosfs_readdir(struct vop_readdir_args *ap) 1519 { 1520 int error = 0; 1521 int diff; 1522 long n; 1523 int blsize; 1524 long on; 1525 u_long cn; 1526 u_long fileno; 1527 u_long dirsperblk; 1528 long bias = 0; 1529 daddr_t bn, lbn; 1530 struct buf *bp; 1531 struct denode *dep = VTODE(ap->a_vp); 1532 struct msdosfsmount *pmp = dep->de_pmp; 1533 struct direntry *dentp; 1534 struct dirent dirbuf; 1535 struct uio *uio = ap->a_uio; 1536 u_long *cookies = NULL; 1537 int ncookies = 0; 1538 off_t offset, off; 1539 int chksum = -1; 1540 1541 #ifdef MSDOSFS_DEBUG 1542 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1543 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1544 #endif 1545 1546 /* 1547 * msdosfs_readdir() won't operate properly on regular files since 1548 * it does i/o only with the the filesystem vnode, and hence can 1549 * retrieve the wrong block from the buffer cache for a plain file. 1550 * So, fail attempts to readdir() on a plain file. 1551 */ 1552 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1553 return (ENOTDIR); 1554 1555 /* 1556 * To be safe, initialize dirbuf 1557 */ 1558 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1559 1560 /* 1561 * If the user buffer is smaller than the size of one dos directory 1562 * entry or the file offset is not a multiple of the size of a 1563 * directory entry, then we fail the read. 1564 */ 1565 off = offset = uio->uio_offset; 1566 if (uio->uio_resid < sizeof(struct direntry) || 1567 (offset & (sizeof(struct direntry) - 1))) 1568 return (EINVAL); 1569 1570 if (ap->a_ncookies) { 1571 ncookies = uio->uio_resid / 16; 1572 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1573 M_WAITOK); 1574 *ap->a_cookies = cookies; 1575 *ap->a_ncookies = ncookies; 1576 } 1577 1578 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1579 1580 /* 1581 * If they are reading from the root directory then, we simulate 1582 * the . and .. entries since these don't exist in the root 1583 * directory. We also set the offset bias to make up for having to 1584 * simulate these entries. By this I mean that at file offset 64 we 1585 * read the first entry in the root directory that lives on disk. 1586 */ 1587 if (dep->de_StartCluster == MSDOSFSROOT 1588 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1589 #if 0 1590 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1591 offset); 1592 #endif 1593 bias = 2 * sizeof(struct direntry); 1594 if (offset < bias) { 1595 for (n = (int)offset / sizeof(struct direntry); 1596 n < 2; n++) { 1597 if (FAT32(pmp)) 1598 dirbuf.d_fileno = cntobn(pmp, 1599 pmp->pm_rootdirblk) 1600 * dirsperblk; 1601 else 1602 dirbuf.d_fileno = 1; 1603 dirbuf.d_type = DT_DIR; 1604 switch (n) { 1605 case 0: 1606 dirbuf.d_namlen = 1; 1607 strcpy(dirbuf.d_name, "."); 1608 break; 1609 case 1: 1610 dirbuf.d_namlen = 2; 1611 strcpy(dirbuf.d_name, ".."); 1612 break; 1613 } 1614 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1615 if (uio->uio_resid < dirbuf.d_reclen) 1616 goto out; 1617 error = uiomove((caddr_t) &dirbuf, 1618 dirbuf.d_reclen, uio); 1619 if (error) 1620 goto out; 1621 offset += sizeof(struct direntry); 1622 off = offset; 1623 if (cookies) { 1624 *cookies++ = offset; 1625 if (--ncookies <= 0) 1626 goto out; 1627 } 1628 } 1629 } 1630 } 1631 1632 off = offset; 1633 while (uio->uio_resid > 0) { 1634 lbn = de_cluster(pmp, offset - bias); 1635 on = (offset - bias) & pmp->pm_crbomask; 1636 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1637 diff = dep->de_FileSize - (offset - bias); 1638 if (diff <= 0) 1639 break; 1640 n = min(n, diff); 1641 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1642 if (error) 1643 break; 1644 error = bread(pmp->pm_devvp, bn, blsize, &bp); 1645 if (error) { 1646 brelse(bp); 1647 return (error); 1648 } 1649 n = min(n, blsize - bp->b_resid); 1650 1651 /* 1652 * Convert from dos directory entries to fs-independent 1653 * directory entries. 1654 */ 1655 for (dentp = (struct direntry *)(bp->b_data + on); 1656 (char *)dentp < bp->b_data + on + n; 1657 dentp++, offset += sizeof(struct direntry)) { 1658 #if 0 1659 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1660 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1661 #endif 1662 /* 1663 * If this is an unused entry, we can stop. 1664 */ 1665 if (dentp->deName[0] == SLOT_EMPTY) { 1666 brelse(bp); 1667 goto out; 1668 } 1669 /* 1670 * Skip deleted entries. 1671 */ 1672 if (dentp->deName[0] == SLOT_DELETED) { 1673 chksum = -1; 1674 continue; 1675 } 1676 1677 /* 1678 * Handle Win95 long directory entries 1679 */ 1680 if (dentp->deAttributes == ATTR_WIN95) { 1681 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1682 continue; 1683 chksum = win2unixfn((struct winentry *)dentp, 1684 &dirbuf, chksum, 1685 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1686 pmp->pm_u2w); 1687 continue; 1688 } 1689 1690 /* 1691 * Skip volume labels 1692 */ 1693 if (dentp->deAttributes & ATTR_VOLUME) { 1694 chksum = -1; 1695 continue; 1696 } 1697 /* 1698 * This computation of d_fileno must match 1699 * the computation of va_fileid in 1700 * msdosfs_getattr. 1701 */ 1702 if (dentp->deAttributes & ATTR_DIRECTORY) { 1703 fileno = getushort(dentp->deStartCluster); 1704 if (FAT32(pmp)) 1705 fileno |= getushort(dentp->deHighClust) << 16; 1706 /* if this is the root directory */ 1707 if (fileno == MSDOSFSROOT) 1708 if (FAT32(pmp)) 1709 fileno = cntobn(pmp, 1710 pmp->pm_rootdirblk) 1711 * dirsperblk; 1712 else 1713 fileno = 1; 1714 else 1715 fileno = cntobn(pmp, fileno) * dirsperblk; 1716 dirbuf.d_fileno = fileno; 1717 dirbuf.d_type = DT_DIR; 1718 } else { 1719 dirbuf.d_fileno = offset / sizeof(struct direntry); 1720 dirbuf.d_type = DT_REG; 1721 } 1722 if (chksum != winChksum(dentp->deName)) 1723 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1724 (u_char *)dirbuf.d_name, 1725 dentp->deLowerCase | 1726 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1727 (LCASE_BASE | LCASE_EXT) : 0), 1728 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1729 pmp->pm_d2u, 1730 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1731 pmp->pm_ul); 1732 else 1733 dirbuf.d_name[dirbuf.d_namlen] = 0; 1734 chksum = -1; 1735 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1736 if (uio->uio_resid < dirbuf.d_reclen) { 1737 brelse(bp); 1738 goto out; 1739 } 1740 error = uiomove((caddr_t) &dirbuf, 1741 dirbuf.d_reclen, uio); 1742 if (error) { 1743 brelse(bp); 1744 goto out; 1745 } 1746 if (cookies) { 1747 *cookies++ = offset + sizeof(struct direntry); 1748 if (--ncookies <= 0) { 1749 brelse(bp); 1750 goto out; 1751 } 1752 } 1753 off = offset + sizeof(struct direntry); 1754 } 1755 brelse(bp); 1756 } 1757 out: 1758 /* Subtract unused cookies */ 1759 if (ap->a_ncookies) 1760 *ap->a_ncookies -= ncookies; 1761 1762 uio->uio_offset = off; 1763 1764 /* 1765 * Set the eofflag (NFS uses it) 1766 */ 1767 if (ap->a_eofflag) { 1768 if (dep->de_FileSize - (offset - bias) <= 0) 1769 *ap->a_eofflag = 1; 1770 else 1771 *ap->a_eofflag = 0; 1772 } 1773 return (error); 1774 } 1775 1776 /* 1777 * vp - address of vnode file the file 1778 * bn - which cluster we are interested in mapping to a filesystem block number. 1779 * vpp - returns the vnode for the block special file holding the filesystem 1780 * containing the file of interest 1781 * bnp - address of where to return the filesystem relative block number 1782 * 1783 * msdosfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp, 1784 * daddr_t *a_bnp, int *a_runp, int *a_runb) 1785 */ 1786 static int 1787 msdosfs_bmap(struct vop_bmap_args *ap) 1788 { 1789 struct denode *dep = VTODE(ap->a_vp); 1790 1791 if (ap->a_vpp != NULL) 1792 *ap->a_vpp = dep->de_devvp; 1793 if (ap->a_bnp == NULL) 1794 return (0); 1795 if (ap->a_runp) { 1796 /* 1797 * Sequential clusters should be counted here. 1798 */ 1799 *ap->a_runp = 0; 1800 } 1801 if (ap->a_runb) { 1802 *ap->a_runb = 0; 1803 } 1804 return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0)); 1805 } 1806 1807 /* 1808 * msdosfs_strategy(struct vnode *a_vp, struct buf *a_bp) 1809 */ 1810 static int 1811 msdosfs_strategy(struct vop_strategy_args *ap) 1812 { 1813 struct buf *bp = ap->a_bp; 1814 struct denode *dep = VTODE(bp->b_vp); 1815 struct vnode *vp; 1816 int error = 0; 1817 1818 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1819 panic("msdosfs_strategy: spec"); 1820 /* 1821 * If we don't already know the filesystem relative block number 1822 * then get it using pcbmap(). If pcbmap() returns the block 1823 * number as -1 then we've got a hole in the file. DOS filesystems 1824 * don't allow files with holes, so we shouldn't ever see this. 1825 */ 1826 if (bp->b_blkno == bp->b_lblkno) { 1827 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0, 0); 1828 if (error) { 1829 bp->b_error = error; 1830 bp->b_flags |= B_ERROR; 1831 biodone(bp); 1832 return (error); 1833 } 1834 if ((long)bp->b_blkno == -1) 1835 vfs_bio_clrbuf(bp); 1836 } 1837 if (bp->b_blkno == -1) { 1838 biodone(bp); 1839 return (0); 1840 } 1841 /* 1842 * Read/write the block from/to the disk that contains the desired 1843 * file block. 1844 */ 1845 vp = dep->de_devvp; 1846 bp->b_dev = vp->v_rdev; 1847 VOP_STRATEGY(vp, bp); 1848 return (0); 1849 } 1850 1851 /* 1852 * msdosfs_print(struct vnode *vp) 1853 */ 1854 static int 1855 msdosfs_print(struct vop_print_args *ap) 1856 { 1857 struct denode *dep = VTODE(ap->a_vp); 1858 1859 printf( 1860 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1861 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1862 printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1863 lockmgr_printinfo(&ap->a_vp->v_lock); 1864 printf("\n"); 1865 return (0); 1866 } 1867 1868 /* 1869 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval) 1870 */ 1871 static int 1872 msdosfs_pathconf(struct vop_pathconf_args *ap) 1873 { 1874 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1875 1876 switch (ap->a_name) { 1877 case _PC_LINK_MAX: 1878 *ap->a_retval = 1; 1879 return (0); 1880 case _PC_NAME_MAX: 1881 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1882 return (0); 1883 case _PC_PATH_MAX: 1884 *ap->a_retval = PATH_MAX; 1885 return (0); 1886 case _PC_CHOWN_RESTRICTED: 1887 *ap->a_retval = 1; 1888 return (0); 1889 case _PC_NO_TRUNC: 1890 *ap->a_retval = 0; 1891 return (0); 1892 default: 1893 return (EINVAL); 1894 } 1895 /* NOTREACHED */ 1896 } 1897 1898 /* 1899 * get page routine 1900 * 1901 * XXX By default, wimp out... note that a_offset is ignored (and always 1902 * XXX has been). 1903 */ 1904 int 1905 msdosfs_getpages(struct vop_getpages_args *ap) 1906 { 1907 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1908 ap->a_reqpage); 1909 } 1910 1911 /* 1912 * put page routine 1913 * 1914 * XXX By default, wimp out... note that a_offset is ignored (and always 1915 * XXX has been). 1916 */ 1917 int 1918 msdosfs_putpages(struct vop_putpages_args *ap) 1919 { 1920 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1921 ap->a_sync, ap->a_rtvals); 1922 } 1923 1924 /* Global vfs data structures for msdosfs */ 1925 struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1926 { &vop_default_desc, vop_defaultop }, 1927 { &vop_access_desc, (vnodeopv_entry_t) msdosfs_access }, 1928 { &vop_bmap_desc, (vnodeopv_entry_t) msdosfs_bmap }, 1929 { &vop_lookup_desc, (vnodeopv_entry_t) msdosfs_lookup }, 1930 { &vop_close_desc, (vnodeopv_entry_t) msdosfs_close }, 1931 { &vop_create_desc, (vnodeopv_entry_t) msdosfs_create }, 1932 { &vop_fsync_desc, (vnodeopv_entry_t) msdosfs_fsync }, 1933 { &vop_getattr_desc, (vnodeopv_entry_t) msdosfs_getattr }, 1934 { &vop_inactive_desc, (vnodeopv_entry_t) msdosfs_inactive }, 1935 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, 1936 { &vop_link_desc, (vnodeopv_entry_t) msdosfs_link }, 1937 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, 1938 { &vop_mkdir_desc, (vnodeopv_entry_t) msdosfs_mkdir }, 1939 { &vop_mknod_desc, (vnodeopv_entry_t) msdosfs_mknod }, 1940 { &vop_pathconf_desc, (vnodeopv_entry_t) msdosfs_pathconf }, 1941 { &vop_print_desc, (vnodeopv_entry_t) msdosfs_print }, 1942 { &vop_read_desc, (vnodeopv_entry_t) msdosfs_read }, 1943 { &vop_readdir_desc, (vnodeopv_entry_t) msdosfs_readdir }, 1944 { &vop_reclaim_desc, (vnodeopv_entry_t) msdosfs_reclaim }, 1945 { &vop_remove_desc, (vnodeopv_entry_t) msdosfs_remove }, 1946 { &vop_rename_desc, (vnodeopv_entry_t) msdosfs_rename }, 1947 { &vop_rmdir_desc, (vnodeopv_entry_t) msdosfs_rmdir }, 1948 { &vop_setattr_desc, (vnodeopv_entry_t) msdosfs_setattr }, 1949 { &vop_strategy_desc, (vnodeopv_entry_t) msdosfs_strategy }, 1950 { &vop_symlink_desc, (vnodeopv_entry_t) msdosfs_symlink }, 1951 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, 1952 { &vop_write_desc, (vnodeopv_entry_t) msdosfs_write }, 1953 { &vop_getpages_desc, (vnodeopv_entry_t) msdosfs_getpages }, 1954 { &vop_putpages_desc, (vnodeopv_entry_t) msdosfs_putpages }, 1955 { NULL, NULL } 1956 }; 1957