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sys/msdosfs/msdosfs_vnops.c
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1 /* $FreeBSD$ */ 2 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 3 4 /*- 5 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 6 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 7 * All rights reserved. 8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by TooLs GmbH. 21 * 4. The name of TooLs GmbH may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /* 36 * Written by Paul Popelka (paulp@uts.amdahl.com) 37 * 38 * You can do anything you want with this software, just don't say you wrote 39 * it, and don't remove this notice. 40 * 41 * This software is provided "as is". 42 * 43 * The author supplies this software to be publicly redistributed on the 44 * understanding that the author is not responsible for the correct 45 * functioning of this software in any circumstances and is not liable for 46 * any damages caused by this software. 47 * 48 * October 1992 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/namei.h> 54 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 55 #include <sys/kernel.h> 56 #include <sys/stat.h> 57 #include <sys/buf.h> 58 #include <sys/proc.h> 59 #include <sys/mount.h> 60 #include <sys/unistd.h> 61 #include <sys/vnode.h> 62 #include <sys/malloc.h> 63 #include <sys/dirent.h> 64 #include <sys/signalvar.h> 65 66 #include <vm/vm.h> 67 #include <vm/vm_extern.h> 68 #include <vm/vm_zone.h> 69 #include <vm/vnode_pager.h> 70 71 #include <msdosfs/bpb.h> 72 #include <msdosfs/direntry.h> 73 #include <msdosfs/denode.h> 74 #include <msdosfs/msdosfsmount.h> 75 #include <msdosfs/fat.h> 76 77 #define DOS_FILESIZE_MAX 0xffffffff 78 79 /* 80 * Prototypes for MSDOSFS vnode operations 81 */ 82 static int msdosfs_create __P((struct vop_create_args *)); 83 static int msdosfs_mknod __P((struct vop_mknod_args *)); 84 static int msdosfs_close __P((struct vop_close_args *)); 85 static int msdosfs_access __P((struct vop_access_args *)); 86 static int msdosfs_getattr __P((struct vop_getattr_args *)); 87 static int msdosfs_setattr __P((struct vop_setattr_args *)); 88 static int msdosfs_read __P((struct vop_read_args *)); 89 static int msdosfs_write __P((struct vop_write_args *)); 90 static int msdosfs_fsync __P((struct vop_fsync_args *)); 91 static int msdosfs_remove __P((struct vop_remove_args *)); 92 static int msdosfs_link __P((struct vop_link_args *)); 93 static int msdosfs_rename __P((struct vop_rename_args *)); 94 static int msdosfs_mkdir __P((struct vop_mkdir_args *)); 95 static int msdosfs_rmdir __P((struct vop_rmdir_args *)); 96 static int msdosfs_symlink __P((struct vop_symlink_args *)); 97 static int msdosfs_readdir __P((struct vop_readdir_args *)); 98 static int msdosfs_bmap __P((struct vop_bmap_args *)); 99 static int msdosfs_strategy __P((struct vop_strategy_args *)); 100 static int msdosfs_print __P((struct vop_print_args *)); 101 static int msdosfs_pathconf __P((struct vop_pathconf_args *ap)); 102 static int msdosfs_getpages __P((struct vop_getpages_args *)); 103 static int msdosfs_putpages __P((struct vop_putpages_args *)); 104 105 /* 106 * Some general notes: 107 * 108 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 109 * read/written using the vnode for the filesystem. Blocks that represent 110 * the contents of a file are read/written using the vnode for the file 111 * (including directories when they are read/written as files). This 112 * presents problems for the dos filesystem because data that should be in 113 * an inode (if dos had them) resides in the directory itself. Since we 114 * must update directory entries without the benefit of having the vnode 115 * for the directory we must use the vnode for the filesystem. This means 116 * that when a directory is actually read/written (via read, write, or 117 * readdir, or seek) we must use the vnode for the filesystem instead of 118 * the vnode for the directory as would happen in ufs. This is to insure we 119 * retreive the correct block from the buffer cache since the hash value is 120 * based upon the vnode address and the desired block number. 121 */ 122 123 /* 124 * Create a regular file. On entry the directory to contain the file being 125 * created is locked. We must release before we return. We must also free 126 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 127 * only if the SAVESTART bit in cn_flags is clear on success. 128 */ 129 static int 130 msdosfs_create(ap) 131 struct vop_create_args /* { 132 struct vnode *a_dvp; 133 struct vnode **a_vpp; 134 struct componentname *a_cnp; 135 struct vattr *a_vap; 136 } */ *ap; 137 { 138 struct componentname *cnp = ap->a_cnp; 139 struct denode ndirent; 140 struct denode *dep; 141 struct denode *pdep = VTODE(ap->a_dvp); 142 struct timespec ts; 143 int error; 144 145 #ifdef MSDOSFS_DEBUG 146 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 147 #endif 148 149 /* 150 * If this is the root directory and there is no space left we 151 * can't do anything. This is because the root directory can not 152 * change size. 153 */ 154 if (pdep->de_StartCluster == MSDOSFSROOT 155 && pdep->de_fndoffset >= pdep->de_FileSize) { 156 error = ENOSPC; 157 goto bad; 158 } 159 160 /* 161 * Create a directory entry for the file, then call createde() to 162 * have it installed. NOTE: DOS files are always executable. We 163 * use the absence of the owner write bit to make the file 164 * readonly. 165 */ 166 #ifdef DIAGNOSTIC 167 if ((cnp->cn_flags & HASBUF) == 0) 168 panic("msdosfs_create: no name"); 169 #endif 170 bzero(&ndirent, sizeof(ndirent)); 171 error = uniqdosname(pdep, cnp, ndirent.de_Name); 172 if (error) 173 goto bad; 174 175 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 176 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 177 ndirent.de_LowerCase = 0; 178 ndirent.de_StartCluster = 0; 179 ndirent.de_FileSize = 0; 180 ndirent.de_dev = pdep->de_dev; 181 ndirent.de_devvp = pdep->de_devvp; 182 ndirent.de_pmp = pdep->de_pmp; 183 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 184 getnanotime(&ts); 185 DETIMES(&ndirent, &ts, &ts, &ts); 186 error = createde(&ndirent, pdep, &dep, cnp); 187 if (error) 188 goto bad; 189 *ap->a_vpp = DETOV(dep); 190 return (0); 191 192 bad: 193 return (error); 194 } 195 196 static int 197 msdosfs_mknod(ap) 198 struct vop_mknod_args /* { 199 struct vnode *a_dvp; 200 struct vnode **a_vpp; 201 struct componentname *a_cnp; 202 struct vattr *a_vap; 203 } */ *ap; 204 { 205 206 switch (ap->a_vap->va_type) { 207 case VDIR: 208 return (msdosfs_mkdir((struct vop_mkdir_args *)ap)); 209 break; 210 211 case VREG: 212 return (msdosfs_create((struct vop_create_args *)ap)); 213 break; 214 215 default: 216 return (EINVAL); 217 } 218 /* NOTREACHED */ 219 } 220 221 static int 222 msdosfs_close(ap) 223 struct vop_close_args /* { 224 struct vnode *a_vp; 225 int a_fflag; 226 struct ucred *a_cred; 227 struct proc *a_p; 228 } */ *ap; 229 { 230 struct vnode *vp = ap->a_vp; 231 struct denode *dep = VTODE(vp); 232 struct timespec ts; 233 234 simple_lock(&vp->v_interlock); 235 if (vp->v_usecount > 1) { 236 getnanotime(&ts); 237 DETIMES(dep, &ts, &ts, &ts); 238 } 239 simple_unlock(&vp->v_interlock); 240 return 0; 241 } 242 243 static int 244 msdosfs_access(ap) 245 struct vop_access_args /* { 246 struct vnode *a_vp; 247 int a_mode; 248 struct ucred *a_cred; 249 struct proc *a_p; 250 } */ *ap; 251 { 252 struct vnode *vp = ap->a_vp; 253 struct denode *dep = VTODE(ap->a_vp); 254 struct msdosfsmount *pmp = dep->de_pmp; 255 struct ucred *cred = ap->a_cred; 256 mode_t mask, file_mode, mode = ap->a_mode; 257 register gid_t *gp; 258 int i; 259 260 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 261 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 262 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 263 264 /* 265 * Disallow write attempts on read-only file systems; 266 * unless the file is a socket, fifo, or a block or 267 * character device resident on the file system. 268 */ 269 if (mode & VWRITE) { 270 switch (vp->v_type) { 271 case VDIR: 272 case VLNK: 273 case VREG: 274 if (vp->v_mount->mnt_flag & MNT_RDONLY) 275 return (EROFS); 276 break; 277 default: 278 break; 279 } 280 } 281 282 /* User id 0 always gets access. */ 283 if (cred->cr_uid == 0) 284 return 0; 285 286 mask = 0; 287 288 /* Otherwise, check the owner. */ 289 if (cred->cr_uid == pmp->pm_uid) { 290 if (mode & VEXEC) 291 mask |= S_IXUSR; 292 if (mode & VREAD) 293 mask |= S_IRUSR; 294 if (mode & VWRITE) 295 mask |= S_IWUSR; 296 return (file_mode & mask) == mask ? 0 : EACCES; 297 } 298 299 /* Otherwise, check the groups. */ 300 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 301 if (pmp->pm_gid == *gp) { 302 if (mode & VEXEC) 303 mask |= S_IXGRP; 304 if (mode & VREAD) 305 mask |= S_IRGRP; 306 if (mode & VWRITE) 307 mask |= S_IWGRP; 308 return (file_mode & mask) == mask ? 0 : EACCES; 309 } 310 311 /* Otherwise, check everyone else. */ 312 if (mode & VEXEC) 313 mask |= S_IXOTH; 314 if (mode & VREAD) 315 mask |= S_IROTH; 316 if (mode & VWRITE) 317 mask |= S_IWOTH; 318 return (file_mode & mask) == mask ? 0 : EACCES; 319 } 320 321 static int 322 msdosfs_getattr(ap) 323 struct vop_getattr_args /* { 324 struct vnode *a_vp; 325 struct vattr *a_vap; 326 struct ucred *a_cred; 327 struct proc *a_p; 328 } */ *ap; 329 { 330 struct denode *dep = VTODE(ap->a_vp); 331 struct msdosfsmount *pmp = dep->de_pmp; 332 struct vattr *vap = ap->a_vap; 333 mode_t mode; 334 struct timespec ts; 335 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 336 u_long fileid; 337 338 getnanotime(&ts); 339 DETIMES(dep, &ts, &ts, &ts); 340 vap->va_fsid = dev2udev(dep->de_dev); 341 /* 342 * The following computation of the fileid must be the same as that 343 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 344 * doesn't work. 345 */ 346 if (dep->de_Attributes & ATTR_DIRECTORY) { 347 fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk; 348 if (dep->de_StartCluster == MSDOSFSROOT) 349 fileid = 1; 350 } else { 351 fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk; 352 if (dep->de_dirclust == MSDOSFSROOT) 353 fileid = roottobn(pmp, 0) * dirsperblk; 354 fileid += dep->de_diroffset / sizeof(struct direntry); 355 } 356 vap->va_fileid = fileid; 357 if ((dep->de_Attributes & ATTR_READONLY) == 0) 358 mode = S_IRWXU|S_IRWXG|S_IRWXO; 359 else 360 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 361 vap->va_mode = mode & 362 (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 363 vap->va_uid = pmp->pm_uid; 364 vap->va_gid = pmp->pm_gid; 365 vap->va_nlink = 1; 366 vap->va_rdev = 0; 367 vap->va_size = dep->de_FileSize; 368 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 369 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 370 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 371 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 372 } else { 373 vap->va_atime = vap->va_mtime; 374 vap->va_ctime = vap->va_mtime; 375 } 376 vap->va_flags = 0; 377 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 378 vap->va_flags |= SF_ARCHIVED; 379 vap->va_gen = 0; 380 vap->va_blocksize = pmp->pm_bpcluster; 381 vap->va_bytes = 382 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 383 vap->va_type = ap->a_vp->v_type; 384 vap->va_filerev = dep->de_modrev; 385 return (0); 386 } 387 388 static int 389 msdosfs_setattr(ap) 390 struct vop_setattr_args /* { 391 struct vnode *a_vp; 392 struct vattr *a_vap; 393 struct ucred *a_cred; 394 struct proc *a_p; 395 } */ *ap; 396 { 397 struct vnode *vp = ap->a_vp; 398 struct denode *dep = VTODE(ap->a_vp); 399 struct msdosfsmount *pmp = dep->de_pmp; 400 struct vattr *vap = ap->a_vap; 401 struct ucred *cred = ap->a_cred; 402 int error = 0; 403 404 #ifdef MSDOSFS_DEBUG 405 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 406 ap->a_vp, vap, cred, ap->a_p); 407 #endif 408 409 /* 410 * Check for unsettable attributes. 411 */ 412 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 413 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 414 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 415 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 416 #ifdef MSDOSFS_DEBUG 417 printf("msdosfs_setattr(): returning EINVAL\n"); 418 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 419 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 420 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 421 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 422 printf(" va_uid %x, va_gid %x\n", 423 vap->va_uid, vap->va_gid); 424 #endif 425 return (EINVAL); 426 } 427 if (vap->va_flags != VNOVAL) { 428 if (vp->v_mount->mnt_flag & MNT_RDONLY) 429 return (EROFS); 430 if (cred->cr_uid != pmp->pm_uid && 431 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT))) 432 return (error); 433 /* 434 * We are very inconsistent about handling unsupported 435 * attributes. We ignored the access time and the 436 * read and execute bits. We were strict for the other 437 * attributes. 438 * 439 * Here we are strict, stricter than ufs in not allowing 440 * users to attempt to set SF_SETTABLE bits or anyone to 441 * set unsupported bits. However, we ignore attempts to 442 * set ATTR_ARCHIVE for directories `cp -pr' from a more 443 * sensible file system attempts it a lot. 444 */ 445 if (cred->cr_uid != 0) { 446 if (vap->va_flags & SF_SETTABLE) 447 return EPERM; 448 } 449 if (vap->va_flags & ~SF_ARCHIVED) 450 return EOPNOTSUPP; 451 if (vap->va_flags & SF_ARCHIVED) 452 dep->de_Attributes &= ~ATTR_ARCHIVE; 453 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 454 dep->de_Attributes |= ATTR_ARCHIVE; 455 dep->de_flag |= DE_MODIFIED; 456 } 457 458 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 459 uid_t uid; 460 gid_t gid; 461 462 if (vp->v_mount->mnt_flag & MNT_RDONLY) 463 return (EROFS); 464 uid = vap->va_uid; 465 if (uid == (uid_t)VNOVAL) 466 uid = pmp->pm_uid; 467 gid = vap->va_gid; 468 if (gid == (gid_t)VNOVAL) 469 gid = pmp->pm_gid; 470 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 471 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 472 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT))) 473 return error; 474 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 475 return EINVAL; 476 } 477 478 if (vap->va_size != VNOVAL) { 479 /* 480 * Disallow write attempts on read-only file systems; 481 * unless the file is a socket, fifo, or a block or 482 * character device resident on the file system. 483 */ 484 switch (vp->v_type) { 485 case VDIR: 486 return (EISDIR); 487 /* NOT REACHED */ 488 case VLNK: 489 case VREG: 490 if (vp->v_mount->mnt_flag & MNT_RDONLY) 491 return (EROFS); 492 break; 493 default: 494 break; 495 } 496 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 497 if (error) 498 return error; 499 } 500 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 501 if (vp->v_mount->mnt_flag & MNT_RDONLY) 502 return (EROFS); 503 if (cred->cr_uid != pmp->pm_uid && 504 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)) && 505 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 506 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_p)))) 507 return (error); 508 if (vp->v_type != VDIR) { 509 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 510 vap->va_atime.tv_sec != VNOVAL) { 511 dep->de_flag &= ~DE_ACCESS; 512 unix2dostime(&vap->va_atime, &dep->de_ADate, 513 NULL, NULL); 514 } 515 if (vap->va_mtime.tv_sec != VNOVAL) { 516 dep->de_flag &= ~DE_UPDATE; 517 unix2dostime(&vap->va_mtime, &dep->de_MDate, 518 &dep->de_MTime, NULL); 519 } 520 dep->de_Attributes |= ATTR_ARCHIVE; 521 dep->de_flag |= DE_MODIFIED; 522 } 523 } 524 /* 525 * DOS files only have the ability to have their writability 526 * attribute set, so we use the owner write bit to set the readonly 527 * attribute. 528 */ 529 if (vap->va_mode != (mode_t)VNOVAL) { 530 if (vp->v_mount->mnt_flag & MNT_RDONLY) 531 return (EROFS); 532 if (cred->cr_uid != pmp->pm_uid && 533 (error = suser_xxx(cred, ap->a_p, PRISON_ROOT))) 534 return (error); 535 if (vp->v_type != VDIR) { 536 /* We ignore the read and execute bits. */ 537 if (vap->va_mode & VWRITE) 538 dep->de_Attributes &= ~ATTR_READONLY; 539 else 540 dep->de_Attributes |= ATTR_READONLY; 541 dep->de_Attributes |= ATTR_ARCHIVE; 542 dep->de_flag |= DE_MODIFIED; 543 } 544 } 545 return (deupdat(dep, 1)); 546 } 547 548 static int 549 msdosfs_read(ap) 550 struct vop_read_args /* { 551 struct vnode *a_vp; 552 struct uio *a_uio; 553 int a_ioflag; 554 struct ucred *a_cred; 555 } */ *ap; 556 { 557 int error = 0; 558 int blsize; 559 int isadir; 560 int orig_resid; 561 u_int n; 562 u_long diff; 563 u_long on; 564 daddr_t lbn; 565 daddr_t rablock; 566 int rasize; 567 int seqcount; 568 struct buf *bp; 569 struct vnode *vp = ap->a_vp; 570 struct denode *dep = VTODE(vp); 571 struct msdosfsmount *pmp = dep->de_pmp; 572 struct uio *uio = ap->a_uio; 573 574 if (uio->uio_offset < 0) 575 return (EINVAL); 576 577 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 578 return (0); 579 /* 580 * If they didn't ask for any data, then we are done. 581 */ 582 orig_resid = uio->uio_resid; 583 if (orig_resid <= 0) 584 return (0); 585 586 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 587 588 isadir = dep->de_Attributes & ATTR_DIRECTORY; 589 do { 590 if (uio->uio_offset >= dep->de_FileSize) 591 break; 592 lbn = de_cluster(pmp, uio->uio_offset); 593 /* 594 * If we are operating on a directory file then be sure to 595 * do i/o with the vnode for the filesystem instead of the 596 * vnode for the directory. 597 */ 598 if (isadir) { 599 /* convert cluster # to block # */ 600 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 601 if (error == E2BIG) { 602 error = EINVAL; 603 break; 604 } else if (error) 605 break; 606 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 607 } else { 608 blsize = pmp->pm_bpcluster; 609 rablock = lbn + 1; 610 if (seqcount > 1 && 611 de_cn2off(pmp, rablock) < dep->de_FileSize) { 612 rasize = pmp->pm_bpcluster; 613 error = breadn(vp, lbn, blsize, 614 &rablock, &rasize, 1, NOCRED, &bp); 615 } else { 616 error = bread(vp, lbn, blsize, NOCRED, &bp); 617 } 618 } 619 if (error) { 620 brelse(bp); 621 break; 622 } 623 on = uio->uio_offset & pmp->pm_crbomask; 624 diff = pmp->pm_bpcluster - on; 625 n = diff > uio->uio_resid ? uio->uio_resid : diff; 626 diff = dep->de_FileSize - uio->uio_offset; 627 if (diff < n) 628 n = diff; 629 diff = blsize - bp->b_resid; 630 if (diff < n) 631 n = diff; 632 error = uiomove(bp->b_data + on, (int) n, uio); 633 brelse(bp); 634 } while (error == 0 && uio->uio_resid > 0 && n != 0); 635 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 636 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 637 dep->de_flag |= DE_ACCESS; 638 return (error); 639 } 640 641 /* 642 * Write data to a file or directory. 643 */ 644 static int 645 msdosfs_write(ap) 646 struct vop_write_args /* { 647 struct vnode *a_vp; 648 struct uio *a_uio; 649 int a_ioflag; 650 struct ucred *a_cred; 651 } */ *ap; 652 { 653 int n; 654 int croffset; 655 int resid; 656 u_long osize; 657 int error = 0; 658 u_long count; 659 daddr_t bn, lastcn; 660 struct buf *bp; 661 int ioflag = ap->a_ioflag; 662 struct uio *uio = ap->a_uio; 663 struct proc *p = uio->uio_procp; 664 struct vnode *vp = ap->a_vp; 665 struct vnode *thisvp; 666 struct denode *dep = VTODE(vp); 667 struct msdosfsmount *pmp = dep->de_pmp; 668 struct ucred *cred = ap->a_cred; 669 670 #ifdef MSDOSFS_DEBUG 671 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 672 vp, uio, ioflag, cred); 673 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 674 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 675 #endif 676 677 switch (vp->v_type) { 678 case VREG: 679 if (ioflag & IO_APPEND) 680 uio->uio_offset = dep->de_FileSize; 681 thisvp = vp; 682 break; 683 case VDIR: 684 return EISDIR; 685 default: 686 panic("msdosfs_write(): bad file type"); 687 } 688 689 if (uio->uio_offset < 0) 690 return (EFBIG); 691 692 if (uio->uio_resid == 0) 693 return (0); 694 695 /* 696 * If they've exceeded their filesize limit, tell them about it. 697 */ 698 if (p && 699 ((uoff_t)uio->uio_offset + uio->uio_resid > 700 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 701 psignal(p, SIGXFSZ); 702 return (EFBIG); 703 } 704 705 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 706 return (EFBIG); 707 708 /* 709 * If the offset we are starting the write at is beyond the end of 710 * the file, then they've done a seek. Unix filesystems allow 711 * files with holes in them, DOS doesn't so we must fill the hole 712 * with zeroed blocks. 713 */ 714 if (uio->uio_offset > dep->de_FileSize) { 715 error = deextend(dep, uio->uio_offset, cred); 716 if (error) 717 return (error); 718 } 719 720 /* 721 * Remember some values in case the write fails. 722 */ 723 resid = uio->uio_resid; 724 osize = dep->de_FileSize; 725 726 /* 727 * If we write beyond the end of the file, extend it to its ultimate 728 * size ahead of the time to hopefully get a contiguous area. 729 */ 730 if (uio->uio_offset + resid > osize) { 731 count = de_clcount(pmp, uio->uio_offset + resid) - 732 de_clcount(pmp, osize); 733 error = extendfile(dep, count, NULL, NULL, 0); 734 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 735 goto errexit; 736 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 737 } else 738 lastcn = de_clcount(pmp, osize) - 1; 739 740 do { 741 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 742 error = ENOSPC; 743 break; 744 } 745 746 croffset = uio->uio_offset & pmp->pm_crbomask; 747 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 748 if (uio->uio_offset + n > dep->de_FileSize) { 749 dep->de_FileSize = uio->uio_offset + n; 750 /* The object size needs to be set before buffer is allocated */ 751 vnode_pager_setsize(vp, dep->de_FileSize); 752 } 753 754 bn = de_cluster(pmp, uio->uio_offset); 755 if ((uio->uio_offset & pmp->pm_crbomask) == 0 756 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 757 > de_cluster(pmp, uio->uio_offset) 758 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 759 /* 760 * If either the whole cluster gets written, 761 * or we write the cluster from its start beyond EOF, 762 * then no need to read data from disk. 763 */ 764 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 765 clrbuf(bp); 766 /* 767 * Do the bmap now, since pcbmap needs buffers 768 * for the fat table. (see msdosfs_strategy) 769 */ 770 if (bp->b_blkno == bp->b_lblkno) { 771 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 772 0, 0); 773 if (error) 774 bp->b_blkno = -1; 775 } 776 if (bp->b_blkno == -1) { 777 brelse(bp); 778 if (!error) 779 error = EIO; /* XXX */ 780 break; 781 } 782 } else { 783 /* 784 * The block we need to write into exists, so read it in. 785 */ 786 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 787 if (error) { 788 brelse(bp); 789 break; 790 } 791 } 792 793 /* 794 * Should these vnode_pager_* functions be done on dir 795 * files? 796 */ 797 798 /* 799 * Copy the data from user space into the buf header. 800 */ 801 error = uiomove(bp->b_data + croffset, n, uio); 802 if (error) { 803 brelse(bp); 804 break; 805 } 806 807 /* 808 * If they want this synchronous then write it and wait for 809 * it. Otherwise, if on a cluster boundary write it 810 * asynchronously so we can move on to the next block 811 * without delay. Otherwise do a delayed write because we 812 * may want to write somemore into the block later. 813 */ 814 if (ioflag & IO_SYNC) 815 (void) bwrite(bp); 816 else if (n + croffset == pmp->pm_bpcluster) 817 bawrite(bp); 818 else 819 bdwrite(bp); 820 dep->de_flag |= DE_UPDATE; 821 } while (error == 0 && uio->uio_resid > 0); 822 823 /* 824 * If the write failed and they want us to, truncate the file back 825 * to the size it was before the write was attempted. 826 */ 827 errexit: 828 if (error) { 829 if (ioflag & IO_UNIT) { 830 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 831 uio->uio_offset -= resid - uio->uio_resid; 832 uio->uio_resid = resid; 833 } else { 834 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 835 if (uio->uio_resid != resid) 836 error = 0; 837 } 838 } else if (ioflag & IO_SYNC) 839 error = deupdat(dep, 1); 840 return (error); 841 } 842 843 /* 844 * Flush the blocks of a file to disk. 845 * 846 * This function is worthless for vnodes that represent directories. Maybe we 847 * could just do a sync if they try an fsync on a directory file. 848 */ 849 static int 850 msdosfs_fsync(ap) 851 struct vop_fsync_args /* { 852 struct vnode *a_vp; 853 struct ucred *a_cred; 854 int a_waitfor; 855 struct proc *a_p; 856 } */ *ap; 857 { 858 struct vnode *vp = ap->a_vp; 859 int s; 860 struct buf *bp, *nbp; 861 862 /* 863 * Flush all dirty buffers associated with a vnode. 864 */ 865 loop: 866 s = splbio(); 867 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) { 868 nbp = TAILQ_NEXT(bp, b_vnbufs); 869 if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) 870 continue; 871 if ((bp->b_flags & B_DELWRI) == 0) 872 panic("msdosfs_fsync: not dirty"); 873 bremfree(bp); 874 splx(s); 875 (void) bwrite(bp); 876 goto loop; 877 } 878 while (vp->v_numoutput) { 879 vp->v_flag |= VBWAIT; 880 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 881 } 882 #ifdef DIAGNOSTIC 883 if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) { 884 vprint("msdosfs_fsync: dirty", vp); 885 goto loop; 886 } 887 #endif 888 splx(s); 889 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 890 } 891 892 static int 893 msdosfs_remove(ap) 894 struct vop_remove_args /* { 895 struct vnode *a_dvp; 896 struct vnode *a_vp; 897 struct componentname *a_cnp; 898 } */ *ap; 899 { 900 struct denode *dep = VTODE(ap->a_vp); 901 struct denode *ddep = VTODE(ap->a_dvp); 902 int error; 903 904 if (ap->a_vp->v_type == VDIR) 905 error = EPERM; 906 else 907 error = removede(ddep, dep); 908 #ifdef MSDOSFS_DEBUG 909 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 910 #endif 911 return (error); 912 } 913 914 /* 915 * DOS filesystems don't know what links are. But since we already called 916 * msdosfs_lookup() with create and lockparent, the parent is locked so we 917 * have to free it before we return the error. 918 */ 919 static int 920 msdosfs_link(ap) 921 struct vop_link_args /* { 922 struct vnode *a_tdvp; 923 struct vnode *a_vp; 924 struct componentname *a_cnp; 925 } */ *ap; 926 { 927 return (EOPNOTSUPP); 928 } 929 930 /* 931 * Renames on files require moving the denode to a new hash queue since the 932 * denode's location is used to compute which hash queue to put the file 933 * in. Unless it is a rename in place. For example "mv a b". 934 * 935 * What follows is the basic algorithm: 936 * 937 * if (file move) { 938 * if (dest file exists) { 939 * remove dest file 940 * } 941 * if (dest and src in same directory) { 942 * rewrite name in existing directory slot 943 * } else { 944 * write new entry in dest directory 945 * update offset and dirclust in denode 946 * move denode to new hash chain 947 * clear old directory entry 948 * } 949 * } else { 950 * directory move 951 * if (dest directory exists) { 952 * if (dest is not empty) { 953 * return ENOTEMPTY 954 * } 955 * remove dest directory 956 * } 957 * if (dest and src in same directory) { 958 * rewrite name in existing entry 959 * } else { 960 * be sure dest is not a child of src directory 961 * write entry in dest directory 962 * update "." and ".." in moved directory 963 * clear old directory entry for moved directory 964 * } 965 * } 966 * 967 * On entry: 968 * source's parent directory is unlocked 969 * source file or directory is unlocked 970 * destination's parent directory is locked 971 * destination file or directory is locked if it exists 972 * 973 * On exit: 974 * all denodes should be released 975 * 976 * Notes: 977 * I'm not sure how the memory containing the pathnames pointed at by the 978 * componentname structures is freed, there may be some memory bleeding 979 * for each rename done. 980 */ 981 static int 982 msdosfs_rename(ap) 983 struct vop_rename_args /* { 984 struct vnode *a_fdvp; 985 struct vnode *a_fvp; 986 struct componentname *a_fcnp; 987 struct vnode *a_tdvp; 988 struct vnode *a_tvp; 989 struct componentname *a_tcnp; 990 } */ *ap; 991 { 992 struct vnode *tdvp = ap->a_tdvp; 993 struct vnode *fvp = ap->a_fvp; 994 struct vnode *fdvp = ap->a_fdvp; 995 struct vnode *tvp = ap->a_tvp; 996 struct componentname *tcnp = ap->a_tcnp; 997 struct componentname *fcnp = ap->a_fcnp; 998 struct proc *p = fcnp->cn_proc; 999 struct denode *ip, *xp, *dp, *zp; 1000 u_char toname[11], oldname[11]; 1001 u_long from_diroffset, to_diroffset; 1002 u_char to_count; 1003 int doingdirectory = 0, newparent = 0; 1004 int error; 1005 u_long cn; 1006 daddr_t bn; 1007 struct denode *fddep; /* from file's parent directory */ 1008 struct msdosfsmount *pmp; 1009 struct direntry *dotdotp; 1010 struct buf *bp; 1011 1012 fddep = VTODE(ap->a_fdvp); 1013 pmp = fddep->de_pmp; 1014 1015 pmp = VFSTOMSDOSFS(fdvp->v_mount); 1016 1017 #ifdef DIAGNOSTIC 1018 if ((tcnp->cn_flags & HASBUF) == 0 || 1019 (fcnp->cn_flags & HASBUF) == 0) 1020 panic("msdosfs_rename: no name"); 1021 #endif 1022 /* 1023 * Check for cross-device rename. 1024 */ 1025 if ((fvp->v_mount != tdvp->v_mount) || 1026 (tvp && (fvp->v_mount != tvp->v_mount))) { 1027 error = EXDEV; 1028 abortit: 1029 if (tdvp == tvp) 1030 vrele(tdvp); 1031 else 1032 vput(tdvp); 1033 if (tvp) 1034 vput(tvp); 1035 vrele(fdvp); 1036 vrele(fvp); 1037 return (error); 1038 } 1039 1040 /* 1041 * If source and dest are the same, do nothing. 1042 */ 1043 if (tvp == fvp) { 1044 error = 0; 1045 goto abortit; 1046 } 1047 1048 error = vn_lock(fvp, LK_EXCLUSIVE, p); 1049 if (error) 1050 goto abortit; 1051 dp = VTODE(fdvp); 1052 ip = VTODE(fvp); 1053 1054 /* 1055 * Be sure we are not renaming ".", "..", or an alias of ".". This 1056 * leads to a crippled directory tree. It's pretty tough to do a 1057 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1058 * doesn't work if the ".." entry is missing. 1059 */ 1060 if (ip->de_Attributes & ATTR_DIRECTORY) { 1061 /* 1062 * Avoid ".", "..", and aliases of "." for obvious reasons. 1063 */ 1064 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1065 dp == ip || 1066 (fcnp->cn_flags & ISDOTDOT) || 1067 (tcnp->cn_flags & ISDOTDOT) || 1068 (ip->de_flag & DE_RENAME)) { 1069 VOP_UNLOCK(fvp, 0, p); 1070 error = EINVAL; 1071 goto abortit; 1072 } 1073 ip->de_flag |= DE_RENAME; 1074 doingdirectory++; 1075 } 1076 1077 /* 1078 * When the target exists, both the directory 1079 * and target vnodes are returned locked. 1080 */ 1081 dp = VTODE(tdvp); 1082 xp = tvp ? VTODE(tvp) : NULL; 1083 /* 1084 * Remember direntry place to use for destination 1085 */ 1086 to_diroffset = dp->de_fndoffset; 1087 to_count = dp->de_fndcnt; 1088 1089 /* 1090 * If ".." must be changed (ie the directory gets a new 1091 * parent) then the source directory must not be in the 1092 * directory heirarchy above the target, as this would 1093 * orphan everything below the source directory. Also 1094 * the user must have write permission in the source so 1095 * as to be able to change "..". We must repeat the call 1096 * to namei, as the parent directory is unlocked by the 1097 * call to doscheckpath(). 1098 */ 1099 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc); 1100 VOP_UNLOCK(fvp, 0, p); 1101 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1102 newparent = 1; 1103 if (doingdirectory && newparent) { 1104 if (error) /* write access check above */ 1105 goto bad; 1106 if (xp != NULL) 1107 vput(tvp); 1108 /* 1109 * doscheckpath() vput()'s dp, 1110 * so we have to do a relookup afterwards 1111 */ 1112 error = doscheckpath(ip, dp); 1113 if (error) 1114 goto out; 1115 if ((tcnp->cn_flags & SAVESTART) == 0) 1116 panic("msdosfs_rename: lost to startdir"); 1117 error = relookup(tdvp, &tvp, tcnp); 1118 if (error) 1119 goto out; 1120 dp = VTODE(tdvp); 1121 xp = tvp ? VTODE(tvp) : NULL; 1122 } 1123 1124 if (xp != NULL) { 1125 /* 1126 * Target must be empty if a directory and have no links 1127 * to it. Also, ensure source and target are compatible 1128 * (both directories, or both not directories). 1129 */ 1130 if (xp->de_Attributes & ATTR_DIRECTORY) { 1131 if (!dosdirempty(xp)) { 1132 error = ENOTEMPTY; 1133 goto bad; 1134 } 1135 if (!doingdirectory) { 1136 error = ENOTDIR; 1137 goto bad; 1138 } 1139 cache_purge(tdvp); 1140 } else if (doingdirectory) { 1141 error = EISDIR; 1142 goto bad; 1143 } 1144 error = removede(dp, xp); 1145 if (error) 1146 goto bad; 1147 vput(tvp); 1148 xp = NULL; 1149 } 1150 1151 /* 1152 * Convert the filename in tcnp into a dos filename. We copy this 1153 * into the denode and directory entry for the destination 1154 * file/directory. 1155 */ 1156 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1157 if (error) 1158 goto abortit; 1159 1160 /* 1161 * Since from wasn't locked at various places above, 1162 * have to do a relookup here. 1163 */ 1164 fcnp->cn_flags &= ~MODMASK; 1165 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1166 if ((fcnp->cn_flags & SAVESTART) == 0) 1167 panic("msdosfs_rename: lost from startdir"); 1168 if (!newparent) 1169 VOP_UNLOCK(tdvp, 0, p); 1170 if (relookup(fdvp, &fvp, fcnp) == 0) 1171 vrele(fdvp); 1172 if (fvp == NULL) { 1173 /* 1174 * From name has disappeared. 1175 */ 1176 if (doingdirectory) 1177 panic("rename: lost dir entry"); 1178 vrele(ap->a_fvp); 1179 if (newparent) 1180 VOP_UNLOCK(tdvp, 0, p); 1181 vrele(tdvp); 1182 return 0; 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 if (xp != ip) { 1197 if (doingdirectory) 1198 panic("rename: lost dir entry"); 1199 vrele(ap->a_fvp); 1200 VOP_UNLOCK(fvp, 0, p); 1201 if (newparent) 1202 VOP_UNLOCK(fdvp, 0, p); 1203 xp = NULL; 1204 } else { 1205 vrele(fvp); 1206 xp = NULL; 1207 1208 /* 1209 * First write a new entry in the destination 1210 * directory and mark the entry in the source directory 1211 * as deleted. Then move the denode to the correct hash 1212 * chain for its new location in the filesystem. And, if 1213 * we moved a directory, then update its .. entry to point 1214 * to the new parent directory. 1215 */ 1216 bcopy(ip->de_Name, oldname, 11); 1217 bcopy(toname, ip->de_Name, 11); /* update denode */ 1218 dp->de_fndoffset = to_diroffset; 1219 dp->de_fndcnt = to_count; 1220 error = createde(ip, dp, (struct denode **)0, tcnp); 1221 if (error) { 1222 bcopy(oldname, ip->de_Name, 11); 1223 if (newparent) 1224 VOP_UNLOCK(fdvp, 0, p); 1225 VOP_UNLOCK(fvp, 0, p); 1226 goto bad; 1227 } 1228 ip->de_refcnt++; 1229 zp->de_fndoffset = from_diroffset; 1230 error = removede(zp, ip); 1231 if (error) { 1232 /* XXX should really panic here, fs is corrupt */ 1233 if (newparent) 1234 VOP_UNLOCK(fdvp, 0, p); 1235 VOP_UNLOCK(fvp, 0, p); 1236 goto bad; 1237 } 1238 if (!doingdirectory) { 1239 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1240 &ip->de_dirclust, 0); 1241 if (error) { 1242 /* XXX should really panic here, fs is corrupt */ 1243 if (newparent) 1244 VOP_UNLOCK(fdvp, 0, p); 1245 VOP_UNLOCK(fvp, 0, p); 1246 goto bad; 1247 } 1248 if (ip->de_dirclust == MSDOSFSROOT) 1249 ip->de_diroffset = to_diroffset; 1250 else 1251 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1252 } 1253 reinsert(ip); 1254 if (newparent) 1255 VOP_UNLOCK(fdvp, 0, p); 1256 } 1257 1258 /* 1259 * If we moved a directory to a new parent directory, then we must 1260 * fixup the ".." entry in the moved directory. 1261 */ 1262 if (doingdirectory && newparent) { 1263 cn = ip->de_StartCluster; 1264 if (cn == MSDOSFSROOT) { 1265 /* this should never happen */ 1266 panic("msdosfs_rename(): updating .. in root directory?"); 1267 } else 1268 bn = cntobn(pmp, cn); 1269 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1270 NOCRED, &bp); 1271 if (error) { 1272 /* XXX should really panic here, fs is corrupt */ 1273 brelse(bp); 1274 VOP_UNLOCK(fvp, 0, p); 1275 goto bad; 1276 } 1277 dotdotp = (struct direntry *)bp->b_data + 1; 1278 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1279 if (FAT32(pmp)) 1280 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1281 error = bwrite(bp); 1282 if (error) { 1283 /* XXX should really panic here, fs is corrupt */ 1284 VOP_UNLOCK(fvp, 0, p); 1285 goto bad; 1286 } 1287 } 1288 1289 VOP_UNLOCK(fvp, 0, p); 1290 bad: 1291 if (xp) 1292 vput(tvp); 1293 vput(tdvp); 1294 out: 1295 ip->de_flag &= ~DE_RENAME; 1296 vrele(fdvp); 1297 vrele(fvp); 1298 return (error); 1299 1300 } 1301 1302 static struct { 1303 struct direntry dot; 1304 struct direntry dotdot; 1305 } dosdirtemplate = { 1306 { ". ", " ", /* the . entry */ 1307 ATTR_DIRECTORY, /* file attribute */ 1308 0, /* reserved */ 1309 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1310 { 0, 0 }, /* access date */ 1311 { 0, 0 }, /* high bits of start cluster */ 1312 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1313 { 0, 0 }, /* startcluster */ 1314 { 0, 0, 0, 0 } /* filesize */ 1315 }, 1316 { ".. ", " ", /* the .. entry */ 1317 ATTR_DIRECTORY, /* file attribute */ 1318 0, /* reserved */ 1319 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1320 { 0, 0 }, /* access date */ 1321 { 0, 0 }, /* high bits of start cluster */ 1322 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1323 { 0, 0 }, /* startcluster */ 1324 { 0, 0, 0, 0 } /* filesize */ 1325 } 1326 }; 1327 1328 static int 1329 msdosfs_mkdir(ap) 1330 struct vop_mkdir_args /* { 1331 struct vnode *a_dvp; 1332 struvt vnode **a_vpp; 1333 struvt componentname *a_cnp; 1334 struct vattr *a_vap; 1335 } */ *ap; 1336 { 1337 struct componentname *cnp = ap->a_cnp; 1338 struct denode *dep; 1339 struct denode *pdep = VTODE(ap->a_dvp); 1340 struct direntry *denp; 1341 struct msdosfsmount *pmp = pdep->de_pmp; 1342 struct buf *bp; 1343 u_long newcluster, pcl; 1344 int bn; 1345 int error; 1346 struct denode ndirent; 1347 struct timespec ts; 1348 1349 /* 1350 * If this is the root directory and there is no space left we 1351 * can't do anything. This is because the root directory can not 1352 * change size. 1353 */ 1354 if (pdep->de_StartCluster == MSDOSFSROOT 1355 && pdep->de_fndoffset >= pdep->de_FileSize) { 1356 error = ENOSPC; 1357 goto bad2; 1358 } 1359 1360 /* 1361 * Allocate a cluster to hold the about to be created directory. 1362 */ 1363 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1364 if (error) 1365 goto bad2; 1366 1367 bzero(&ndirent, sizeof(ndirent)); 1368 ndirent.de_pmp = pmp; 1369 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1370 getnanotime(&ts); 1371 DETIMES(&ndirent, &ts, &ts, &ts); 1372 1373 /* 1374 * Now fill the cluster with the "." and ".." entries. And write 1375 * the cluster to disk. This way it is there for the parent 1376 * directory to be pointing at if there were a crash. 1377 */ 1378 bn = cntobn(pmp, newcluster); 1379 /* always succeeds */ 1380 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1381 bzero(bp->b_data, pmp->pm_bpcluster); 1382 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1383 denp = (struct direntry *)bp->b_data; 1384 putushort(denp[0].deStartCluster, newcluster); 1385 putushort(denp[0].deCDate, ndirent.de_CDate); 1386 putushort(denp[0].deCTime, ndirent.de_CTime); 1387 denp[0].deCHundredth = ndirent.de_CHun; 1388 putushort(denp[0].deADate, ndirent.de_ADate); 1389 putushort(denp[0].deMDate, ndirent.de_MDate); 1390 putushort(denp[0].deMTime, ndirent.de_MTime); 1391 pcl = pdep->de_StartCluster; 1392 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1393 pcl = 0; 1394 putushort(denp[1].deStartCluster, pcl); 1395 putushort(denp[1].deCDate, ndirent.de_CDate); 1396 putushort(denp[1].deCTime, ndirent.de_CTime); 1397 denp[1].deCHundredth = ndirent.de_CHun; 1398 putushort(denp[1].deADate, ndirent.de_ADate); 1399 putushort(denp[1].deMDate, ndirent.de_MDate); 1400 putushort(denp[1].deMTime, ndirent.de_MTime); 1401 if (FAT32(pmp)) { 1402 putushort(denp[0].deHighClust, newcluster >> 16); 1403 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1404 } 1405 1406 error = bwrite(bp); 1407 if (error) 1408 goto bad; 1409 1410 /* 1411 * Now build up a directory entry pointing to the newly allocated 1412 * cluster. This will be written to an empty slot in the parent 1413 * directory. 1414 */ 1415 #ifdef DIAGNOSTIC 1416 if ((cnp->cn_flags & HASBUF) == 0) 1417 panic("msdosfs_mkdir: no name"); 1418 #endif 1419 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1420 if (error) 1421 goto bad; 1422 1423 ndirent.de_Attributes = ATTR_DIRECTORY; 1424 ndirent.de_LowerCase = 0; 1425 ndirent.de_StartCluster = newcluster; 1426 ndirent.de_FileSize = 0; 1427 ndirent.de_dev = pdep->de_dev; 1428 ndirent.de_devvp = pdep->de_devvp; 1429 error = createde(&ndirent, pdep, &dep, cnp); 1430 if (error) 1431 goto bad; 1432 *ap->a_vpp = DETOV(dep); 1433 return (0); 1434 1435 bad: 1436 clusterfree(pmp, newcluster, NULL); 1437 bad2: 1438 return (error); 1439 } 1440 1441 static int 1442 msdosfs_rmdir(ap) 1443 struct vop_rmdir_args /* { 1444 struct vnode *a_dvp; 1445 struct vnode *a_vp; 1446 struct componentname *a_cnp; 1447 } */ *ap; 1448 { 1449 register struct vnode *vp = ap->a_vp; 1450 register struct vnode *dvp = ap->a_dvp; 1451 register struct componentname *cnp = ap->a_cnp; 1452 register struct denode *ip, *dp; 1453 struct proc *p = cnp->cn_proc; 1454 int error; 1455 1456 ip = VTODE(vp); 1457 dp = VTODE(dvp); 1458 1459 /* 1460 * Verify the directory is empty (and valid). 1461 * (Rmdir ".." won't be valid since 1462 * ".." will contain a reference to 1463 * the current directory and thus be 1464 * non-empty.) 1465 */ 1466 error = 0; 1467 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1468 error = ENOTEMPTY; 1469 goto out; 1470 } 1471 /* 1472 * Delete the entry from the directory. For dos filesystems this 1473 * gets rid of the directory entry on disk, the in memory copy 1474 * still exists but the de_refcnt is <= 0. This prevents it from 1475 * being found by deget(). When the vput() on dep is done we give 1476 * up access and eventually msdosfs_reclaim() will be called which 1477 * will remove it from the denode cache. 1478 */ 1479 error = removede(dp, ip); 1480 if (error) 1481 goto out; 1482 /* 1483 * This is where we decrement the link count in the parent 1484 * directory. Since dos filesystems don't do this we just purge 1485 * the name cache. 1486 */ 1487 cache_purge(dvp); 1488 VOP_UNLOCK(dvp, 0, p); 1489 /* 1490 * Truncate the directory that is being deleted. 1491 */ 1492 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, p); 1493 cache_purge(vp); 1494 1495 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p); 1496 out: 1497 return (error); 1498 } 1499 1500 /* 1501 * DOS filesystems don't know what symlinks are. 1502 */ 1503 static int 1504 msdosfs_symlink(ap) 1505 struct vop_symlink_args /* { 1506 struct vnode *a_dvp; 1507 struct vnode **a_vpp; 1508 struct componentname *a_cnp; 1509 struct vattr *a_vap; 1510 char *a_target; 1511 } */ *ap; 1512 { 1513 return (EOPNOTSUPP); 1514 } 1515 1516 static int 1517 msdosfs_readdir(ap) 1518 struct vop_readdir_args /* { 1519 struct vnode *a_vp; 1520 struct uio *a_uio; 1521 struct ucred *a_cred; 1522 int *a_eofflag; 1523 int *a_ncookies; 1524 u_long **a_cookies; 1525 } */ *ap; 1526 { 1527 int error = 0; 1528 int diff; 1529 long n; 1530 int blsize; 1531 long on; 1532 u_long cn; 1533 u_long fileno; 1534 u_long dirsperblk; 1535 long bias = 0; 1536 daddr_t bn, lbn; 1537 struct buf *bp; 1538 struct denode *dep = VTODE(ap->a_vp); 1539 struct msdosfsmount *pmp = dep->de_pmp; 1540 struct direntry *dentp; 1541 struct dirent dirbuf; 1542 struct uio *uio = ap->a_uio; 1543 u_long *cookies = NULL; 1544 int ncookies = 0; 1545 off_t offset, off; 1546 int chksum = -1; 1547 1548 #ifdef MSDOSFS_DEBUG 1549 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1550 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1551 #endif 1552 1553 /* 1554 * msdosfs_readdir() won't operate properly on regular files since 1555 * it does i/o only with the the filesystem vnode, and hence can 1556 * retrieve the wrong block from the buffer cache for a plain file. 1557 * So, fail attempts to readdir() on a plain file. 1558 */ 1559 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1560 return (ENOTDIR); 1561 1562 /* 1563 * To be safe, initialize dirbuf 1564 */ 1565 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1566 1567 /* 1568 * If the user buffer is smaller than the size of one dos directory 1569 * entry or the file offset is not a multiple of the size of a 1570 * directory entry, then we fail the read. 1571 */ 1572 off = offset = uio->uio_offset; 1573 if (uio->uio_resid < sizeof(struct direntry) || 1574 (offset & (sizeof(struct direntry) - 1))) 1575 return (EINVAL); 1576 1577 if (ap->a_ncookies) { 1578 ncookies = uio->uio_resid / 16; 1579 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1580 M_WAITOK); 1581 *ap->a_cookies = cookies; 1582 *ap->a_ncookies = ncookies; 1583 } 1584 1585 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1586 1587 /* 1588 * If they are reading from the root directory then, we simulate 1589 * the . and .. entries since these don't exist in the root 1590 * directory. We also set the offset bias to make up for having to 1591 * simulate these entries. By this I mean that at file offset 64 we 1592 * read the first entry in the root directory that lives on disk. 1593 */ 1594 if (dep->de_StartCluster == MSDOSFSROOT 1595 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1596 #if 0 1597 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1598 offset); 1599 #endif 1600 bias = 2 * sizeof(struct direntry); 1601 if (offset < bias) { 1602 for (n = (int)offset / sizeof(struct direntry); 1603 n < 2; n++) { 1604 if (FAT32(pmp)) 1605 dirbuf.d_fileno = cntobn(pmp, 1606 pmp->pm_rootdirblk) 1607 * dirsperblk; 1608 else 1609 dirbuf.d_fileno = 1; 1610 dirbuf.d_type = DT_DIR; 1611 switch (n) { 1612 case 0: 1613 dirbuf.d_namlen = 1; 1614 strcpy(dirbuf.d_name, "."); 1615 break; 1616 case 1: 1617 dirbuf.d_namlen = 2; 1618 strcpy(dirbuf.d_name, ".."); 1619 break; 1620 } 1621 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1622 if (uio->uio_resid < dirbuf.d_reclen) 1623 goto out; 1624 error = uiomove((caddr_t) &dirbuf, 1625 dirbuf.d_reclen, uio); 1626 if (error) 1627 goto out; 1628 offset += sizeof(struct direntry); 1629 off = offset; 1630 if (cookies) { 1631 *cookies++ = offset; 1632 if (--ncookies <= 0) 1633 goto out; 1634 } 1635 } 1636 } 1637 } 1638 1639 off = offset; 1640 while (uio->uio_resid > 0) { 1641 lbn = de_cluster(pmp, offset - bias); 1642 on = (offset - bias) & pmp->pm_crbomask; 1643 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1644 diff = dep->de_FileSize - (offset - bias); 1645 if (diff <= 0) 1646 break; 1647 n = min(n, diff); 1648 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1649 if (error) 1650 break; 1651 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1652 if (error) { 1653 brelse(bp); 1654 return (error); 1655 } 1656 n = min(n, blsize - bp->b_resid); 1657 if (n == 0) { 1658 brelse(bp); 1659 return (EIO); 1660 } 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);
Cache object: c92b344b34639bb416acd588f623398b
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