1 /* $Id: msdosfs_vnops.c,v 1.33 1996/09/19 18:20:47 nate Exp $ */ 2 /* $NetBSD: msdosfs_vnops.c,v 1.20 1994/08/21 18:44:13 ws Exp $ */ 3 4 /*- 5 * Copyright (C) 1994 Wolfgang Solfrank. 6 * Copyright (C) 1994 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 <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */ 63 #include <sys/malloc.h> 64 #include <sys/dir.h> /* defines dirent structure */ 65 #include <sys/signalvar.h> 66 67 #include <vm/vm.h> 68 #include <vm/vm_param.h> 69 #include <vm/vm_extern.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 /* 78 * Prototypes for MSDOSFS vnode operations 79 */ 80 static int msdosfs_create __P((struct vop_create_args *)); 81 static int msdosfs_mknod __P((struct vop_mknod_args *)); 82 static int msdosfs_open __P((struct vop_open_args *)); 83 static int msdosfs_close __P((struct vop_close_args *)); 84 static int msdosfs_access __P((struct vop_access_args *)); 85 static int msdosfs_getattr __P((struct vop_getattr_args *)); 86 static int msdosfs_setattr __P((struct vop_setattr_args *)); 87 static int msdosfs_read __P((struct vop_read_args *)); 88 static int msdosfs_write __P((struct vop_write_args *)); 89 static int msdosfs_ioctl __P((struct vop_ioctl_args *)); 90 static int msdosfs_select __P((struct vop_select_args *)); 91 static int msdosfs_mmap __P((struct vop_mmap_args *)); 92 static int msdosfs_fsync __P((struct vop_fsync_args *)); 93 static int msdosfs_seek __P((struct vop_seek_args *)); 94 static int msdosfs_remove __P((struct vop_remove_args *)); 95 static int msdosfs_link __P((struct vop_link_args *)); 96 static int msdosfs_rename __P((struct vop_rename_args *)); 97 static int msdosfs_mkdir __P((struct vop_mkdir_args *)); 98 static int msdosfs_rmdir __P((struct vop_rmdir_args *)); 99 static int msdosfs_symlink __P((struct vop_symlink_args *)); 100 static int msdosfs_readdir __P((struct vop_readdir_args *)); 101 static int msdosfs_readlink __P((struct vop_readlink_args *)); 102 static int msdosfs_abortop __P((struct vop_abortop_args *)); 103 static int msdosfs_lock __P((struct vop_lock_args *)); 104 static int msdosfs_unlock __P((struct vop_unlock_args *)); 105 static int msdosfs_bmap __P((struct vop_bmap_args *)); 106 static int msdosfs_strategy __P((struct vop_strategy_args *)); 107 static int msdosfs_print __P((struct vop_print_args *)); 108 static int msdosfs_islocked __P((struct vop_islocked_args *)); 109 static int msdosfs_advlock __P((struct vop_advlock_args *)); 110 static int msdosfs_pathconf __P((struct vop_pathconf_args *ap)); 111 static int msdosfs_reallocblks __P((struct vop_reallocblks_args *)); 112 113 /* 114 * Some general notes: 115 * 116 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 117 * read/written using the vnode for the filesystem. Blocks that represent 118 * the contents of a file are read/written using the vnode for the file 119 * (including directories when they are read/written as files). This 120 * presents problems for the dos filesystem because data that should be in 121 * an inode (if dos had them) resides in the directory itself. Since we 122 * must update directory entries without the benefit of having the vnode 123 * for the directory we must use the vnode for the filesystem. This means 124 * that when a directory is actually read/written (via read, write, or 125 * readdir, or seek) we must use the vnode for the filesystem instead of 126 * the vnode for the directory as would happen in ufs. This is to insure we 127 * retreive the correct block from the buffer cache since the hash value is 128 * based upon the vnode address and the desired block number. 129 */ 130 131 /* 132 * Create a regular file. On entry the directory to contain the file being 133 * created is locked. We must release before we return. We must also free 134 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 135 * only if the SAVESTART bit in cn_flags is clear on success. 136 */ 137 static int 138 msdosfs_create(ap) 139 struct vop_create_args /* { 140 struct vnode *a_dvp; 141 struct vnode **a_vpp; 142 struct componentname *a_cnp; 143 struct vattr *a_vap; 144 } */ *ap; 145 { 146 struct componentname *cnp = ap->a_cnp; 147 struct denode ndirent; 148 struct denode *dep; 149 struct denode *pdep = VTODE(ap->a_dvp); 150 struct timespec ts; 151 int error; 152 153 #ifdef MSDOSFS_DEBUG 154 printf("msdosfs_create(cnp %08x, vap %08x\n", cnp, ap->a_vap); 155 #endif 156 157 /* 158 * Create a directory entry for the file, then call createde() to 159 * have it installed. NOTE: DOS files are always executable. We 160 * use the absence of the owner write bit to make the file 161 * readonly. 162 */ 163 #ifdef DIAGNOSTIC 164 if ((cnp->cn_flags & SAVENAME) == 0) 165 panic("msdosfs_create: no name"); 166 #endif 167 bzero(&ndirent, sizeof(ndirent)); 168 TIMEVAL_TO_TIMESPEC(&time, &ts); 169 unix2dostime(&ts, &ndirent.de_Date, &ndirent.de_Time); 170 unix2dosfn((u_char *)cnp->cn_nameptr, ndirent.de_Name, cnp->cn_namelen); 171 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) 172 ? ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 173 ndirent.de_StartCluster = 0; 174 ndirent.de_FileSize = 0; 175 ndirent.de_dev = pdep->de_dev; 176 ndirent.de_devvp = pdep->de_devvp; 177 if ((error = createde(&ndirent, pdep, &dep)) == 0) { 178 *ap->a_vpp = DETOV(dep); 179 if ((cnp->cn_flags & SAVESTART) == 0) 180 free(cnp->cn_pnbuf, M_NAMEI); 181 } else { 182 free(cnp->cn_pnbuf, M_NAMEI); 183 } 184 vput(ap->a_dvp); /* release parent dir */ 185 return error; 186 } 187 188 static int 189 msdosfs_mknod(ap) 190 struct vop_mknod_args /* { 191 struct vnode *a_dvp; 192 struct vnode **a_vpp; 193 struct componentname *a_cnp; 194 struct vattr *a_vap; 195 } */ *ap; 196 { 197 int error; 198 199 switch (ap->a_vap->va_type) { 200 case VDIR: 201 error = msdosfs_mkdir((struct vop_mkdir_args *)ap); 202 break; 203 204 case VREG: 205 error = msdosfs_create((struct vop_create_args *)ap); 206 break; 207 208 default: 209 error = EINVAL; 210 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 211 vput(ap->a_dvp); 212 break; 213 } 214 return error; 215 } 216 217 static int 218 msdosfs_open(ap) 219 struct vop_open_args /* { 220 struct vnode *a_vp; 221 int a_mode; 222 struct ucred *a_cred; 223 struct proc *a_p; 224 } */ *ap; 225 { 226 return 0; 227 } 228 229 static int 230 msdosfs_close(ap) 231 struct vop_close_args /* { 232 struct vnode *a_vp; 233 int a_fflag; 234 struct ucred *a_cred; 235 struct proc *a_p; 236 } */ *ap; 237 { 238 struct vnode *vp = ap->a_vp; 239 struct denode *dep = VTODE(vp); 240 241 if (vp->v_usecount > 1 && !(dep->de_flag & DE_LOCKED)) 242 DE_TIMES(dep, &time); 243 return 0; 244 } 245 246 static int 247 msdosfs_access(ap) 248 struct vop_access_args /* { 249 struct vnode *a_vp; 250 int a_mode; 251 struct ucred *a_cred; 252 struct proc *a_p; 253 } */ *ap; 254 { 255 struct vnode *vp = ap->a_vp; 256 struct denode *dep = VTODE(ap->a_vp); 257 struct msdosfsmount *pmp = dep->de_pmp; 258 struct ucred *cred = ap->a_cred; 259 mode_t mask, file_mode, mode = ap->a_mode; 260 register gid_t *gp; 261 int i; 262 263 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 264 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 265 file_mode &= pmp->pm_mask; 266 267 /* 268 * Disallow write attempts on read-only file systems; 269 * unless the file is a socket, fifo, or a block or 270 * character device resident on the file system. 271 */ 272 if (mode & VWRITE) { 273 switch (vp->v_type) { 274 case VDIR: 275 case VLNK: 276 case VREG: 277 if (vp->v_mount->mnt_flag & MNT_RDONLY) 278 return (EROFS); 279 break; 280 } 281 } 282 283 /* User id 0 always gets access. */ 284 if (cred->cr_uid == 0) 285 return 0; 286 287 mask = 0; 288 289 /* Otherwise, check the owner. */ 290 if (cred->cr_uid == pmp->pm_uid) { 291 if (mode & VEXEC) 292 mask |= S_IXUSR; 293 if (mode & VREAD) 294 mask |= S_IRUSR; 295 if (mode & VWRITE) 296 mask |= S_IWUSR; 297 return (file_mode & mask) == mask ? 0 : EACCES; 298 } 299 300 /* Otherwise, check the groups. */ 301 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 302 if (pmp->pm_gid == *gp) { 303 if (mode & VEXEC) 304 mask |= S_IXGRP; 305 if (mode & VREAD) 306 mask |= S_IRGRP; 307 if (mode & VWRITE) 308 mask |= S_IWGRP; 309 return (file_mode & mask) == mask ? 0 : EACCES; 310 } 311 312 /* Otherwise, check everyone else. */ 313 if (mode & VEXEC) 314 mask |= S_IXOTH; 315 if (mode & VREAD) 316 mask |= S_IROTH; 317 if (mode & VWRITE) 318 mask |= S_IWOTH; 319 return (file_mode & mask) == mask ? 0 : EACCES; 320 } 321 322 static int 323 msdosfs_getattr(ap) 324 struct vop_getattr_args /* { 325 struct vnode *a_vp; 326 struct vattr *a_vap; 327 struct ucred *a_cred; 328 struct proc *a_p; 329 } */ *ap; 330 { 331 u_int cn; 332 struct denode *dep = VTODE(ap->a_vp); 333 struct vattr *vap = ap->a_vap; 334 335 DE_TIMES(dep, &time); 336 vap->va_fsid = dep->de_dev; 337 /* 338 * The following computation of the fileid must be the same as that 339 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 340 * doesn't work. 341 */ 342 if (dep->de_Attributes & ATTR_DIRECTORY) { 343 if ((cn = dep->de_StartCluster) == MSDOSFSROOT) 344 cn = 1; 345 } else { 346 if ((cn = dep->de_dirclust) == MSDOSFSROOT) 347 cn = 1; 348 cn = (cn << 16) | (dep->de_diroffset & 0xffff); 349 } 350 vap->va_fileid = cn; 351 vap->va_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 352 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 353 vap->va_mode &= dep->de_pmp->pm_mask; 354 if (dep->de_Attributes & ATTR_DIRECTORY) 355 vap->va_mode |= S_IFDIR; 356 vap->va_nlink = 1; 357 vap->va_gid = dep->de_pmp->pm_gid; 358 vap->va_uid = dep->de_pmp->pm_uid; 359 vap->va_rdev = 0; 360 vap->va_size = dep->de_FileSize; 361 dos2unixtime(dep->de_Date, dep->de_Time, &vap->va_atime); 362 vap->va_mtime = vap->va_atime; 363 #if 0 364 #ifndef MSDOSFS_NODIRMOD 365 if (vap->va_mode & S_IFDIR) 366 TIMEVAL_TO_TIMESPEC(&time, &vap->va_mtime); 367 #endif 368 #endif 369 vap->va_ctime = vap->va_atime; 370 vap->va_flags = (dep->de_Attributes & ATTR_ARCHIVE) ? 0 : SF_ARCHIVED; 371 vap->va_gen = 0; 372 vap->va_blocksize = dep->de_pmp->pm_bpcluster; 373 vap->va_bytes = (dep->de_FileSize + dep->de_pmp->pm_crbomask) & 374 ~(dep->de_pmp->pm_crbomask); 375 vap->va_type = ap->a_vp->v_type; 376 vap->va_filerev = dep->de_modrev; 377 return 0; 378 } 379 380 static int 381 msdosfs_setattr(ap) 382 struct vop_setattr_args /* { 383 struct vnode *a_vp; 384 struct vattr *a_vap; 385 struct ucred *a_cred; 386 struct proc *a_p; 387 } */ *ap; 388 { 389 struct vnode *vp = ap->a_vp; 390 struct denode *dep = VTODE(ap->a_vp); 391 struct vattr *vap = ap->a_vap; 392 struct ucred *cred = ap->a_cred; 393 int error = 0; 394 395 /* 396 * Check for unsettable attributes. 397 */ 398 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 399 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 400 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 401 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 402 return (EINVAL); 403 } 404 if (vap->va_flags != VNOVAL) { 405 if (vp->v_mount->mnt_flag & MNT_RDONLY) 406 return (EROFS); 407 if (cred->cr_uid != dep->de_pmp->pm_uid && 408 (error = suser(cred, &ap->a_p->p_acflag))) 409 return (error); 410 /* 411 * We are very inconsistent about handling unsupported 412 * attributes. We ignored the the access time and the 413 * read and execute bits. We were strict for the other 414 * attributes. 415 * 416 * Here we are strict, stricter than ufs in not allowing 417 * users to attempt to set SF_SETTABLE bits or anyone to 418 * set unsupported bits. However, we ignore attempts to 419 * set ATTR_ARCHIVE for directories `cp -pr' from a more 420 * sensible file system attempts it a lot. 421 */ 422 if (cred->cr_uid != 0) { 423 if (vap->va_flags & SF_SETTABLE) 424 return EPERM; 425 } 426 if (vap->va_flags & ~SF_ARCHIVED) 427 return EINVAL; 428 if (vap->va_flags & SF_ARCHIVED) 429 dep->de_Attributes &= ~ATTR_ARCHIVE; 430 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 431 dep->de_Attributes |= ATTR_ARCHIVE; 432 dep->de_flag |= DE_MODIFIED; 433 } 434 435 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (uid_t)VNOVAL) { 436 if (vp->v_mount->mnt_flag & MNT_RDONLY) 437 return (EROFS); 438 if ((cred->cr_uid != dep->de_pmp->pm_uid || 439 vap->va_uid != dep->de_pmp->pm_uid || 440 (vap->va_gid != dep->de_pmp->pm_gid && 441 !groupmember(vap->va_gid, cred))) && 442 (error = suser(cred, &ap->a_p->p_acflag))) 443 return error; 444 if (vap->va_uid != dep->de_pmp->pm_uid || 445 vap->va_gid != dep->de_pmp->pm_gid) 446 return EINVAL; 447 } 448 if (vap->va_size != VNOVAL) { 449 /* 450 * Disallow write attempts on read-only file systems; 451 * unless the file is a socket, fifo, or a block or 452 * character device resident on the file system. 453 */ 454 switch (vp->v_type) { 455 case VDIR: 456 return (EISDIR); 457 case VLNK: 458 case VREG: 459 if (vp->v_mount->mnt_flag & MNT_RDONLY) 460 return (EROFS); 461 break; 462 } 463 error = detrunc(dep, vap->va_size, 0, cred, ap->a_p); 464 if (error) 465 return error; 466 } 467 if (vap->va_mtime.tv_sec != VNOVAL) { 468 if (vp->v_mount->mnt_flag & MNT_RDONLY) 469 return (EROFS); 470 if (cred->cr_uid != dep->de_pmp->pm_uid && 471 (error = suser(cred, &ap->a_p->p_acflag)) && 472 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 473 (error = VOP_ACCESS(vp, VWRITE, cred, ap->a_p)))) 474 return error; 475 dep->de_flag |= DE_UPDATE; 476 error = deupdat(dep, &vap->va_mtime, 1); 477 if (error) 478 return error; 479 } 480 481 /* 482 * DOS files only have the ability to have their writability 483 * attribute set, so we use the owner write bit to set the readonly 484 * attribute. 485 */ 486 error = 0; 487 if (vap->va_mode != (u_short) VNOVAL) { 488 if (vp->v_mount->mnt_flag & MNT_RDONLY) 489 return (EROFS); 490 if (cred->cr_uid != dep->de_pmp->pm_uid && 491 (error = suser(cred, &ap->a_p->p_acflag))) 492 return error; 493 494 /* We ignore the read and execute bits */ 495 if (vap->va_mode & VWRITE) 496 dep->de_Attributes &= ~ATTR_READONLY; 497 else 498 dep->de_Attributes |= ATTR_READONLY; 499 dep->de_flag |= DE_MODIFIED; 500 } 501 return error; 502 } 503 504 static int 505 msdosfs_read(ap) 506 struct vop_read_args /* { 507 struct vnode *a_vp; 508 struct uio *a_uio; 509 int a_ioflag; 510 struct ucred *a_cred; 511 } */ *ap; 512 { 513 int error = 0; 514 int diff; 515 int isadir; 516 long n; 517 long on; 518 daddr_t lbn; 519 daddr_t rablock; 520 int rasize; 521 struct buf *bp; 522 struct vnode *vp = ap->a_vp; 523 struct denode *dep = VTODE(vp); 524 struct msdosfsmount *pmp = dep->de_pmp; 525 struct uio *uio = ap->a_uio; 526 527 /* 528 * If they didn't ask for any data, then we are done. 529 */ 530 if (uio->uio_resid == 0) 531 return 0; 532 if (uio->uio_offset < 0) 533 return EINVAL; 534 535 isadir = dep->de_Attributes & ATTR_DIRECTORY; 536 do { 537 lbn = uio->uio_offset >> pmp->pm_cnshift; 538 on = uio->uio_offset & pmp->pm_crbomask; 539 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 540 diff = dep->de_FileSize - uio->uio_offset; 541 if (diff <= 0) 542 return 0; 543 /* convert cluster # to block # if a directory */ 544 if (isadir) { 545 error = pcbmap(dep, lbn, &lbn, 0); 546 if (error) 547 return error; 548 } 549 if (diff < n) 550 n = diff; 551 /* 552 * If we are operating on a directory file then be sure to 553 * do i/o with the vnode for the filesystem instead of the 554 * vnode for the directory. 555 */ 556 if (isadir) { 557 error = bread(pmp->pm_devvp, lbn, pmp->pm_bpcluster, 558 NOCRED, &bp); 559 } else { 560 rablock = lbn + 1; 561 #ifdef PC98 562 /* 563 * 1024byte/sector support 564 */ 565 if (pmp->pm_BytesPerSec == 1024) 566 vp->v_flag |= 0x10000; 567 #endif 568 if (vp->v_lastr + 1 == lbn && 569 rablock * pmp->pm_bpcluster < dep->de_FileSize) { 570 rasize = pmp->pm_bpcluster; 571 error = breadn(vp, lbn, pmp->pm_bpcluster, 572 &rablock, &rasize, 1, 573 NOCRED, &bp); 574 } else { 575 error = bread(vp, lbn, pmp->pm_bpcluster, NOCRED, 576 &bp); 577 } 578 vp->v_lastr = lbn; 579 } 580 n = min(n, pmp->pm_bpcluster - bp->b_resid); 581 if (error) { 582 brelse(bp); 583 return error; 584 } 585 error = uiomove(bp->b_data + on, (int) n, uio); 586 /* 587 * If we have read everything from this block or have read 588 * to end of file then we are done with this block. Mark 589 * it to say the buffer can be reused if need be. 590 */ 591 #if 0 592 if (n + on == pmp->pm_bpcluster || 593 uio->uio_offset == dep->de_FileSize) 594 bp->b_flags |= B_AGE; 595 #endif 596 brelse(bp); 597 } while (error == 0 && uio->uio_resid > 0 && n != 0); 598 return error; 599 } 600 601 /* 602 * Write data to a file or directory. 603 */ 604 static int 605 msdosfs_write(ap) 606 struct vop_write_args /* { 607 struct vnode *a_vp; 608 struct uio *a_uio; 609 int a_ioflag; 610 struct ucred *a_cred; 611 } */ *ap; 612 { 613 int n; 614 int isadir; 615 int croffset; 616 int resid; 617 int osize; 618 int error = 0; 619 u_long count; 620 daddr_t bn, lastcn; 621 struct buf *bp; 622 int ioflag = ap->a_ioflag; 623 struct uio *uio = ap->a_uio; 624 struct proc *p = uio->uio_procp; 625 struct vnode *vp = ap->a_vp; 626 struct vnode *thisvp; 627 struct denode *dep = VTODE(vp); 628 struct msdosfsmount *pmp = dep->de_pmp; 629 struct ucred *cred = ap->a_cred; 630 struct timespec ts; 631 632 #ifdef MSDOSFS_DEBUG 633 printf("msdosfs_write(vp %08x, uio %08x, ioflag %08x, cred %08x\n", 634 vp, uio, ioflag, cred); 635 printf("msdosfs_write(): diroff %d, dirclust %d, startcluster %d\n", 636 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 637 #endif 638 639 switch (vp->v_type) { 640 case VREG: 641 if (ioflag & IO_APPEND) 642 uio->uio_offset = dep->de_FileSize; 643 isadir = 0; 644 thisvp = vp; 645 break; 646 647 case VDIR: 648 if ((ioflag & IO_SYNC) == 0) 649 panic("msdosfs_write(): non-sync directory update"); 650 isadir = 1; 651 thisvp = pmp->pm_devvp; 652 break; 653 654 default: 655 panic("msdosfs_write(): bad file type"); 656 break; 657 } 658 659 if (uio->uio_offset < 0) 660 return EINVAL; 661 662 if (uio->uio_resid == 0) 663 return 0; 664 665 /* 666 * If they've exceeded their filesize limit, tell them about it. 667 */ 668 if (vp->v_type == VREG && p && 669 ((uio->uio_offset + uio->uio_resid) > 670 p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) { 671 psignal(p, SIGXFSZ); 672 return EFBIG; 673 } 674 675 /* 676 * If attempting to write beyond the end of the root directory we 677 * stop that here because the root directory can not grow. 678 */ 679 if ((dep->de_Attributes & ATTR_DIRECTORY) && 680 dep->de_StartCluster == MSDOSFSROOT && 681 (uio->uio_offset + uio->uio_resid) > dep->de_FileSize) 682 return ENOSPC; 683 684 /* 685 * If the offset we are starting the write at is beyond the end of 686 * the file, then they've done a seek. Unix filesystems allow 687 * files with holes in them, DOS doesn't so we must fill the hole 688 * with zeroed blocks. 689 */ 690 if (uio->uio_offset > dep->de_FileSize) { 691 error = deextend(dep, uio->uio_offset, cred); 692 if (error) 693 return error; 694 } 695 696 /* 697 * Remember some values in case the write fails. 698 */ 699 resid = uio->uio_resid; 700 osize = dep->de_FileSize; 701 702 703 #ifdef PC98 704 /* 705 * 1024byte/sector support 706 */ 707 if (pmp->pm_BytesPerSec == 1024) 708 thisvp->v_flag |= 0x10000; 709 #endif 710 /* 711 * If we write beyond the end of the file, extend it to its ultimate 712 * size ahead of the time to hopefully get a contiguous area. 713 */ 714 if (uio->uio_offset + resid > osize) { 715 count = de_clcount(pmp, uio->uio_offset + resid) - de_clcount(pmp, osize); 716 if ((error = extendfile(dep, count, NULL, NULL, 0)) 717 && (error != ENOSPC || (ioflag & IO_UNIT))) 718 goto errexit; 719 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 720 } else 721 lastcn = de_clcount(pmp, osize) - 1; 722 723 do { 724 bn = de_blk(pmp, uio->uio_offset); 725 if (isadir) { 726 error = pcbmap(dep, bn, &bn, 0); 727 if (error) 728 break; 729 } else if (bn > lastcn) { 730 error = ENOSPC; 731 break; 732 } 733 734 croffset = uio->uio_offset & pmp->pm_crbomask; 735 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 736 if (uio->uio_offset + n > dep->de_FileSize) { 737 dep->de_FileSize = uio->uio_offset + n; 738 /* The object size needs to be set before buffer is allocated */ 739 vnode_pager_setsize(vp, dep->de_FileSize); 740 } 741 742 if ((uio->uio_offset & pmp->pm_crbomask) == 0 743 && (de_blk(pmp, uio->uio_offset + uio->uio_resid) > de_blk(pmp, uio->uio_offset) 744 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 745 /* 746 * If either the whole cluster gets written, 747 * or we write the cluster from its start beyond EOF, 748 * then no need to read data from disk. 749 */ 750 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0); 751 clrbuf(bp); 752 /* 753 * Do the bmap now, since pcbmap needs buffers 754 * for the fat table. (see msdosfs_strategy) 755 */ 756 if (!isadir) { 757 if (bp->b_blkno == bp->b_lblkno) { 758 error = pcbmap(dep, bp->b_lblkno, 759 &bp->b_blkno, 0); 760 if (error) 761 bp->b_blkno = -1; 762 } 763 if (bp->b_blkno == -1) { 764 brelse(bp); 765 if (!error) 766 error = EIO; /* XXX */ 767 break; 768 } 769 } 770 } else { 771 /* 772 * The block we need to write into exists, so read it in. 773 */ 774 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 775 if (error) 776 break; 777 } 778 779 /* 780 * Should these vnode_pager_* functions be done on dir 781 * files? 782 */ 783 784 /* 785 * Copy the data from user space into the buf header. 786 */ 787 error = uiomove(bp->b_data + croffset, n, uio); 788 789 /* 790 * If they want this synchronous then write it and wait for 791 * it. Otherwise, if on a cluster boundary write it 792 * asynchronously so we can move on to the next block 793 * without delay. Otherwise do a delayed write because we 794 * may want to write somemore into the block later. 795 */ 796 if (ioflag & IO_SYNC) 797 (void) bwrite(bp); 798 else if (n + croffset == pmp->pm_bpcluster) { 799 bawrite(bp); 800 } else 801 bdwrite(bp); 802 dep->de_flag |= DE_UPDATE; 803 } while (error == 0 && uio->uio_resid > 0); 804 805 /* 806 * If the write failed and they want us to, truncate the file back 807 * to the size it was before the write was attempted. 808 */ 809 errexit: 810 if (error) { 811 if (ioflag & IO_UNIT) { 812 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 813 uio->uio_offset -= resid - uio->uio_resid; 814 uio->uio_resid = resid; 815 } else { 816 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 817 if (uio->uio_resid != resid) 818 error = 0; 819 } 820 } else { 821 TIMEVAL_TO_TIMESPEC(&time, &ts); 822 error = deupdat(dep, &ts, 1); 823 } 824 return error; 825 } 826 827 static int 828 msdosfs_ioctl(ap) 829 struct vop_ioctl_args /* { 830 struct vnode *a_vp; 831 int a_command; 832 caddr_t a_data; 833 int a_fflag; 834 struct ucred *a_cred; 835 struct proc *a_p; 836 } */ *ap; 837 { 838 return ENOTTY; 839 } 840 841 static int 842 msdosfs_select(ap) 843 struct vop_select_args /* { 844 struct vnode *a_vp; 845 int a_which; 846 int a_fflags; 847 struct ucred *a_cred; 848 struct proc *a_p; 849 } */ *ap; 850 { 851 return 1; /* DOS filesystems never block? */ 852 } 853 854 static int 855 msdosfs_mmap(ap) 856 struct vop_mmap_args /* { 857 struct vnode *a_vp; 858 int a_fflags; 859 struct ucred *a_cred; 860 struct proc *a_p; 861 } */ *ap; 862 { 863 return EINVAL; 864 } 865 866 /* 867 * Flush the blocks of a file to disk. 868 * 869 * This function is worthless for vnodes that represent directories. Maybe we 870 * could just do a sync if they try an fsync on a directory file. 871 */ 872 static int 873 msdosfs_fsync(ap) 874 struct vop_fsync_args /* { 875 struct vnode *a_vp; 876 struct ucred *a_cred; 877 int a_waitfor; 878 struct proc *a_p; 879 } */ *ap; 880 { 881 register struct vnode *vp = ap->a_vp; 882 register struct buf *bp; 883 int wait = ap->a_waitfor == MNT_WAIT; 884 struct timespec ts; 885 struct buf *nbp; 886 int s; 887 888 /* 889 * Flush all dirty buffers associated with a vnode. 890 */ 891 loop: 892 s = splbio(); 893 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 894 nbp = bp->b_vnbufs.le_next; 895 if ((bp->b_flags & B_BUSY)) 896 continue; 897 if ((bp->b_flags & B_DELWRI) == 0) 898 panic("msdosfs_fsync: not dirty"); 899 bremfree(bp); 900 bp->b_flags |= B_BUSY; 901 splx(s); 902 (void) bwrite(bp); 903 goto loop; 904 } 905 while (vp->v_numoutput) { 906 vp->v_flag |= VBWAIT; 907 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0); 908 } 909 #ifdef DIAGNOSTIC 910 if (vp->v_dirtyblkhd.lh_first) { 911 vprint("msdosfs_fsync: dirty", vp); 912 goto loop; 913 } 914 #endif 915 splx(s); 916 TIMEVAL_TO_TIMESPEC(&time, &ts); 917 return deupdat(VTODE(vp), &ts, wait); 918 } 919 920 /* 921 * Now the whole work of extending a file is done in the write function. 922 * So nothing to do here. 923 */ 924 static int 925 msdosfs_seek(ap) 926 struct vop_seek_args /* { 927 struct vnode *a_vp; 928 off_t a_oldoff; 929 off_t a_newoff; 930 struct ucred *a_cred; 931 } */ *ap; 932 { 933 return 0; 934 } 935 936 static int 937 msdosfs_remove(ap) 938 struct vop_remove_args /* { 939 struct vnode *a_dvp; 940 struct vnode *a_vp; 941 struct componentname *a_cnp; 942 } */ *ap; 943 { 944 int error; 945 struct denode *dep = VTODE(ap->a_vp); 946 struct denode *ddep = VTODE(ap->a_dvp); 947 948 error = removede(ddep,dep); 949 #ifdef MSDOSFS_DEBUG 950 printf("msdosfs_remove(), dep %08x, v_usecount %d\n", dep, ap->a_vp->v_usecount); 951 #endif 952 if (ddep == dep) 953 vrele(ap->a_vp); 954 else 955 vput(ap->a_vp); /* causes msdosfs_inactive() to be called 956 * via vrele() */ 957 vput(ap->a_dvp); 958 return error; 959 } 960 961 /* 962 * DOS filesystems don't know what links are. But since we already called 963 * msdosfs_lookup() with create and lockparent, the parent is locked so we 964 * have to free it before we return the error. 965 */ 966 static int 967 msdosfs_link(ap) 968 struct vop_link_args /* { 969 struct vnode *a_tdvp; 970 struct vnode *a_vp; 971 struct componentname *a_cnp; 972 } */ *ap; 973 { 974 VOP_ABORTOP(ap->a_tdvp, ap->a_cnp); 975 vput(ap->a_tdvp); 976 return EOPNOTSUPP; 977 } 978 979 /* 980 * Renames on files require moving the denode to a new hash queue since the 981 * denode's location is used to compute which hash queue to put the file 982 * in. Unless it is a rename in place. For example "mv a b". 983 * 984 * What follows is the basic algorithm: 985 * 986 * if (file move) { 987 * if (dest file exists) { 988 * remove dest file 989 * } 990 * if (dest and src in same directory) { 991 * rewrite name in existing directory slot 992 * } else { 993 * write new entry in dest directory 994 * update offset and dirclust in denode 995 * move denode to new hash chain 996 * clear old directory entry 997 * } 998 * } else { 999 * directory move 1000 * if (dest directory exists) { 1001 * if (dest is not empty) { 1002 * return ENOTEMPTY 1003 * } 1004 * remove dest directory 1005 * } 1006 * if (dest and src in same directory) { 1007 * rewrite name in existing entry 1008 * } else { 1009 * be sure dest is not a child of src directory 1010 * write entry in dest directory 1011 * update "." and ".." in moved directory 1012 * clear old directory entry for moved directory 1013 * } 1014 * } 1015 * 1016 * On entry: 1017 * source's parent directory is unlocked 1018 * source file or directory is unlocked 1019 * destination's parent directory is locked 1020 * destination file or directory is locked if it exists 1021 * 1022 * On exit: 1023 * all denodes should be released 1024 * 1025 * Notes: 1026 * I'm not sure how the memory containing the pathnames pointed at by the 1027 * componentname structures is freed, there may be some memory bleeding 1028 * for each rename done. 1029 */ 1030 static int 1031 msdosfs_rename(ap) 1032 struct vop_rename_args /* { 1033 struct vnode *a_fdvp; 1034 struct vnode *a_fvp; 1035 struct componentname *a_fcnp; 1036 struct vnode *a_tdvp; 1037 struct vnode *a_tvp; 1038 struct componentname *a_tcnp; 1039 } */ *ap; 1040 { 1041 u_char toname[11]; 1042 int error; 1043 int newparent = 0; 1044 int sourceisadirectory = 0; 1045 u_long cn; 1046 daddr_t bn; 1047 struct vnode *tvp = ap->a_tvp; 1048 struct denode *fddep; /* from file's parent directory */ 1049 struct denode *fdep; /* from file or directory */ 1050 struct denode *tddep; /* to file's parent directory */ 1051 struct denode *tdep; /* to file or directory */ 1052 struct msdosfsmount *pmp; 1053 struct direntry *dotdotp; 1054 struct direntry *ep; 1055 struct buf *bp; 1056 1057 fddep = VTODE(ap->a_fdvp); 1058 fdep = VTODE(ap->a_fvp); 1059 tddep = VTODE(ap->a_tdvp); 1060 tdep = tvp ? VTODE(tvp) : NULL; 1061 pmp = fddep->de_pmp; 1062 1063 /* Check for cross-device rename */ 1064 if ((ap->a_fvp->v_mount != ap->a_tdvp->v_mount) || 1065 (tvp && (ap->a_fvp->v_mount != tvp->v_mount))) { 1066 error = EXDEV; 1067 goto bad; 1068 } 1069 1070 /* 1071 * Convert the filename in tcnp into a dos filename. We copy this 1072 * into the denode and directory entry for the destination 1073 * file/directory. 1074 */ 1075 unix2dosfn((u_char *) ap->a_tcnp->cn_nameptr, 1076 toname, ap->a_tcnp->cn_namelen); 1077 1078 /* 1079 * At this point this is the lock state of the denodes: 1080 * fddep referenced 1081 * fdep referenced 1082 * tddep locked 1083 * tdep locked if it exists 1084 */ 1085 1086 /* 1087 * Be sure we are not renaming ".", "..", or an alias of ".". This 1088 * leads to a crippled directory tree. It's pretty tough to do a 1089 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1090 * doesn't work if the ".." entry is missing. 1091 */ 1092 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1093 if ((ap->a_fcnp->cn_namelen == 1 1094 && ap->a_fcnp->cn_nameptr[0] == '.') 1095 || fddep == fdep 1096 || (ap->a_fcnp->cn_flags | ap->a_tcnp->cn_flags) 1097 & ISDOTDOT) { 1098 VOP_ABORTOP(ap->a_tdvp, ap->a_tcnp); 1099 vput(ap->a_tdvp); 1100 if (tvp) 1101 vput(tvp); 1102 VOP_ABORTOP(ap->a_fdvp, ap->a_fcnp); 1103 vrele(ap->a_fdvp); 1104 vrele(ap->a_fvp); 1105 return EINVAL; 1106 } 1107 sourceisadirectory = 1; 1108 } 1109 1110 /* 1111 * If we are renaming a directory, and the directory is being moved 1112 * to another directory, then we must be sure the destination 1113 * directory is not in the subtree of the source directory. This 1114 * could orphan everything under the source directory. 1115 * doscheckpath() unlocks the destination's parent directory so we 1116 * must look it up again to relock it. 1117 */ 1118 if (fddep->de_StartCluster != tddep->de_StartCluster) 1119 newparent = 1; 1120 if (sourceisadirectory && newparent) { 1121 if (tdep) { 1122 vput(ap->a_tvp); 1123 tdep = NULL; 1124 } 1125 /* doscheckpath() vput()'s tddep */ 1126 error = doscheckpath(fdep, tddep); 1127 tddep = NULL; 1128 if (error) 1129 goto bad; 1130 if ((ap->a_tcnp->cn_flags & SAVESTART) == 0) 1131 panic("msdosfs_rename(): lost to startdir"); 1132 error = relookup(ap->a_tdvp, &tvp, ap->a_tcnp); 1133 if (error) 1134 goto bad; 1135 tddep = VTODE(ap->a_tdvp); 1136 tdep = tvp ? VTODE(tvp) : NULL; 1137 } 1138 1139 /* 1140 * If the destination exists, then be sure its type (file or dir) 1141 * matches that of the source. And, if it is a directory make sure 1142 * it is empty. Then delete the destination. 1143 */ 1144 if (tdep) { 1145 if (tdep->de_Attributes & ATTR_DIRECTORY) { 1146 if (!sourceisadirectory) { 1147 error = ENOTDIR; 1148 goto bad; 1149 } 1150 if (!dosdirempty(tdep)) { 1151 error = ENOTEMPTY; 1152 goto bad; 1153 } 1154 cache_purge(DETOV(tddep)); 1155 } else { /* destination is file */ 1156 if (sourceisadirectory) { 1157 error = EISDIR; 1158 goto bad; 1159 } 1160 } 1161 error = removede(tddep,tdep); 1162 if (error) 1163 goto bad; 1164 vput(ap->a_tvp); 1165 tdep = NULL; 1166 } 1167 1168 /* 1169 * If the source and destination are in the same directory then 1170 * just read in the directory entry, change the name in the 1171 * directory entry and write it back to disk. 1172 */ 1173 if (newparent == 0) { 1174 /* tddep and fddep point to the same denode here */ 1175 VOP_LOCK(ap->a_fvp); /* ap->a_fdvp is already locked */ 1176 error = readep(fddep->de_pmp, fdep->de_dirclust, 1177 fdep->de_diroffset, &bp, &ep); 1178 if (error) { 1179 VOP_UNLOCK(ap->a_fvp); 1180 goto bad; 1181 } 1182 bcopy(toname, ep->deName, 11); 1183 error = bwrite(bp); 1184 if (error) { 1185 VOP_UNLOCK(ap->a_fvp); 1186 goto bad; 1187 } 1188 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1189 /* 1190 * fdep locked fddep and tddep point to the same denode 1191 * which is locked tdep is NULL 1192 */ 1193 } else { 1194 u_long dirsize = 0L; 1195 1196 /* 1197 * If the source and destination are in different 1198 * directories, then mark the entry in the source directory 1199 * as deleted and write a new entry in the destination 1200 * directory. Then move the denode to the correct hash 1201 * chain for its new location in the filesystem. And, if 1202 * we moved a directory, then update its .. entry to point 1203 * to the new parent directory. If we moved a directory 1204 * will also insure that the directory entry on disk has a 1205 * filesize of zero. 1206 */ 1207 VOP_LOCK(ap->a_fvp); 1208 bcopy(toname, fdep->de_Name, 11); /* update denode */ 1209 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1210 dirsize = fdep->de_FileSize; 1211 fdep->de_FileSize = 0; 1212 } 1213 error = createde(fdep, tddep, (struct denode **) 0); 1214 if (fdep->de_Attributes & ATTR_DIRECTORY) { 1215 fdep->de_FileSize = dirsize; 1216 } 1217 if (error) { 1218 /* should put back filename */ 1219 VOP_UNLOCK(ap->a_fvp); 1220 goto bad; 1221 } 1222 VOP_LOCK(ap->a_fdvp); 1223 error = readep(fddep->de_pmp, fddep->de_fndclust, 1224 fddep->de_fndoffset, &bp, &ep); 1225 if (error) { 1226 VOP_UNLOCK(ap->a_fvp); 1227 VOP_UNLOCK(ap->a_fdvp); 1228 goto bad; 1229 } 1230 ep->deName[0] = SLOT_DELETED; 1231 error = bwrite(bp); 1232 if (error) { 1233 VOP_UNLOCK(ap->a_fvp); 1234 VOP_UNLOCK(ap->a_fdvp); 1235 goto bad; 1236 } 1237 if (!sourceisadirectory) { 1238 fdep->de_dirclust = tddep->de_fndclust; 1239 fdep->de_diroffset = tddep->de_fndoffset; 1240 reinsert(fdep); 1241 } 1242 VOP_UNLOCK(ap->a_fdvp); 1243 } 1244 /* fdep is still locked here */ 1245 1246 /* 1247 * If we moved a directory to a new parent directory, then we must 1248 * fixup the ".." entry in the moved directory. 1249 */ 1250 if (sourceisadirectory && newparent) { 1251 cn = fdep->de_StartCluster; 1252 if (cn == MSDOSFSROOT) { 1253 /* this should never happen */ 1254 panic("msdosfs_rename(): updating .. in root directory?"); 1255 } else { 1256 bn = cntobn(pmp, cn); 1257 } 1258 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1259 NOCRED, &bp); 1260 if (error) { 1261 /* should really panic here, fs is corrupt */ 1262 VOP_UNLOCK(ap->a_fvp); 1263 goto bad; 1264 } 1265 dotdotp = (struct direntry *) bp->b_data + 1; 1266 putushort(dotdotp->deStartCluster, tddep->de_StartCluster); 1267 error = bwrite(bp); 1268 VOP_UNLOCK(ap->a_fvp); 1269 if (error) { 1270 /* should really panic here, fs is corrupt */ 1271 goto bad; 1272 } 1273 } else 1274 VOP_UNLOCK(ap->a_fvp); 1275 bad: ; 1276 vrele(DETOV(fdep)); 1277 vrele(DETOV(fddep)); 1278 if (tdep) 1279 vput(DETOV(tdep)); 1280 if (tddep) 1281 vput(DETOV(tddep)); 1282 return error; 1283 } 1284 1285 static struct { 1286 struct direntry dot; 1287 struct direntry dotdot; 1288 } dosdirtemplate = { 1289 { 1290 ". ", " ", /* the . entry */ 1291 ATTR_DIRECTORY, /* file attribute */ 1292 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1293 {210, 4}, {210, 4}, /* time and date */ 1294 {0, 0}, /* startcluster */ 1295 {0, 0, 0, 0}, /* filesize */ 1296 },{ 1297 ".. ", " ", /* the .. entry */ 1298 ATTR_DIRECTORY, /* file attribute */ 1299 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* resevered */ 1300 {210, 4}, {210, 4}, /* time and date */ 1301 {0, 0}, /* startcluster */ 1302 {0, 0, 0, 0}, /* filesize */ 1303 } 1304 }; 1305 1306 static int 1307 msdosfs_mkdir(ap) 1308 struct vop_mkdir_args /* { 1309 struct vnode *a_dvp; 1310 struvt vnode **a_vpp; 1311 struvt componentname *a_cnp; 1312 struct vattr *a_vap; 1313 } */ *ap; 1314 { 1315 int bn; 1316 int error; 1317 u_long newcluster; 1318 struct denode *pdep; 1319 struct denode *ndep; 1320 struct direntry *denp; 1321 struct denode ndirent; 1322 struct msdosfsmount *pmp; 1323 struct buf *bp; 1324 struct timespec ts; 1325 u_short dDate, dTime; 1326 1327 pdep = VTODE(ap->a_dvp); 1328 1329 /* 1330 * If this is the root directory and there is no space left we 1331 * can't do anything. This is because the root directory can not 1332 * change size. 1333 */ 1334 if (pdep->de_StartCluster == MSDOSFSROOT && pdep->de_fndclust == (u_long)-1) { 1335 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1336 vput(ap->a_dvp); 1337 return ENOSPC; 1338 } 1339 1340 pmp = pdep->de_pmp; 1341 1342 /* 1343 * Allocate a cluster to hold the about to be created directory. 1344 */ 1345 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1346 if (error) { 1347 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1348 vput(ap->a_dvp); 1349 return error; 1350 } 1351 1352 /* 1353 * Now fill the cluster with the "." and ".." entries. And write 1354 * the cluster to disk. This way it is there for the parent 1355 * directory to be pointing at if there were a crash. 1356 */ 1357 bn = cntobn(pmp, newcluster); 1358 /* always succeeds */ 1359 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0); 1360 bzero(bp->b_data, pmp->pm_bpcluster); 1361 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1362 denp = (struct direntry *) bp->b_data; 1363 putushort(denp->deStartCluster, newcluster); 1364 TIMEVAL_TO_TIMESPEC(&time, &ts); 1365 unix2dostime(&ts, &dDate, &dTime); 1366 putushort(denp->deDate, dDate); 1367 putushort(denp->deTime, dTime); 1368 denp++; 1369 putushort(denp->deStartCluster, pdep->de_StartCluster); 1370 putushort(denp->deDate, dDate); 1371 putushort(denp->deTime, dTime); 1372 error = bwrite(bp); 1373 if (error) { 1374 clusterfree(pmp, newcluster, NULL); 1375 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1376 vput(ap->a_dvp); 1377 return error; 1378 } 1379 1380 /* 1381 * Now build up a directory entry pointing to the newly allocated 1382 * cluster. This will be written to an empty slot in the parent 1383 * directory. 1384 */ 1385 ndep = &ndirent; 1386 bzero(ndep, sizeof(*ndep)); 1387 unix2dosfn((u_char *)ap->a_cnp->cn_nameptr, 1388 ndep->de_Name, ap->a_cnp->cn_namelen); 1389 TIMEVAL_TO_TIMESPEC(&time, &ts); 1390 unix2dostime(&ts, &ndep->de_Date, &ndep->de_Time); 1391 ndep->de_StartCluster = newcluster; 1392 ndep->de_Attributes = ATTR_DIRECTORY; 1393 1394 error = createde(ndep, pdep, &ndep); 1395 if (error) { 1396 clusterfree(pmp, newcluster, NULL); 1397 } else { 1398 *ap->a_vpp = DETOV(ndep); 1399 } 1400 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1401 #ifdef MSDOSFS_DEBUG 1402 printf("msdosfs_mkdir(): vput(%08x)\n", ap->a_dvp); 1403 #endif 1404 vput(ap->a_dvp); 1405 return error; 1406 } 1407 1408 static int 1409 msdosfs_rmdir(ap) 1410 struct vop_rmdir_args /* { 1411 struct vnode *a_dvp; 1412 struct vnode *a_vp; 1413 struct componentname *a_cnp; 1414 } */ *ap; 1415 { 1416 struct denode *ddep; 1417 struct denode *dep; 1418 int error = 0; 1419 1420 ddep = VTODE(ap->a_dvp); /* parent dir of dir to delete */ 1421 dep = VTODE(ap->a_vp);/* directory to delete */ 1422 1423 /* 1424 * Don't let "rmdir ." go thru. 1425 */ 1426 if (ddep == dep) { 1427 vrele(ap->a_vp); 1428 vput(ap->a_vp); 1429 return EINVAL; 1430 } 1431 1432 /* 1433 * Be sure the directory being deleted is empty. 1434 */ 1435 if (dosdirempty(dep) == 0) { 1436 error = ENOTEMPTY; 1437 goto out; 1438 } 1439 1440 /* 1441 * Delete the entry from the directory. For dos filesystems this 1442 * gets rid of the directory entry on disk, the in memory copy 1443 * still exists but the de_refcnt is <= 0. This prevents it from 1444 * being found by deget(). When the vput() on dep is done we give 1445 * up access and eventually msdosfs_reclaim() will be called which 1446 * will remove it from the denode cache. 1447 */ 1448 error = removede(ddep,dep); 1449 if (error) 1450 goto out; 1451 1452 /* 1453 * This is where we decrement the link count in the parent 1454 * directory. Since dos filesystems don't do this we just purge 1455 * the name cache and let go of the parent directory denode. 1456 */ 1457 cache_purge(DETOV(ddep)); 1458 vput(ap->a_dvp); 1459 ap->a_dvp = NULL; 1460 1461 /* 1462 * Truncate the directory that is being deleted. 1463 */ 1464 error = detrunc(dep, (u_long) 0, IO_SYNC, NOCRED, NULL); 1465 cache_purge(DETOV(dep)); 1466 1467 out: ; 1468 if (ap->a_dvp) 1469 vput(ap->a_dvp); 1470 vput(ap->a_vp); 1471 return error; 1472 } 1473 1474 /* 1475 * DOS filesystems don't know what symlinks are. 1476 */ 1477 static int 1478 msdosfs_symlink(ap) 1479 struct vop_symlink_args /* { 1480 struct vnode *a_dvp; 1481 struct vnode **a_vpp; 1482 struct componentname *a_cnp; 1483 struct vattr *a_vap; 1484 char *a_target; 1485 } */ *ap; 1486 { 1487 free(ap->a_cnp->cn_pnbuf, M_NAMEI); 1488 vput(ap->a_dvp); 1489 return EINVAL; 1490 } 1491 1492 /* 1493 * Dummy dirents to simulate the "." and ".." entries of the root directory 1494 * in a dos filesystem. Dos doesn't provide these. Note that each entry 1495 * must be the same size as a dos directory entry (32 bytes). 1496 */ 1497 static struct dos_dirent { 1498 u_long d_fileno; 1499 u_short d_reclen; 1500 u_char d_type; 1501 u_char d_namlen; 1502 u_char d_name[24]; 1503 } rootdots[2] = { 1504 1505 { 1506 1, /* d_fileno */ 1507 sizeof(struct direntry), /* d_reclen */ 1508 DT_DIR, /* d_type */ 1509 1, /* d_namlen */ 1510 "." /* d_name */ 1511 }, 1512 { 1513 1, /* d_fileno */ 1514 sizeof(struct direntry), /* d_reclen */ 1515 DT_DIR, /* d_type */ 1516 2, /* d_namlen */ 1517 ".." /* d_name */ 1518 } 1519 }; 1520 1521 static int 1522 msdosfs_readdir(ap) 1523 struct vop_readdir_args /* { 1524 struct vnode *a_vp; 1525 struct uio *a_uio; 1526 struct ucred *a_cred; 1527 int *a_eofflag; 1528 u_int *a_cookies; 1529 int a_ncookies; 1530 } */ *ap; 1531 { 1532 int error = 0; 1533 int diff; 1534 char pushout; 1535 long n; 1536 long on; 1537 long lost; 1538 long count; 1539 u_long cn; 1540 u_long fileno; 1541 long bias = 0; 1542 daddr_t bn; 1543 daddr_t lbn; 1544 struct buf *bp; 1545 struct denode *dep = VTODE(ap->a_vp); 1546 struct msdosfsmount *pmp = dep->de_pmp; 1547 struct direntry *dentp; 1548 struct dirent *prev; 1549 struct dirent *crnt; 1550 u_char dirbuf[512]; /* holds converted dos directories */ 1551 struct uio *uio = ap->a_uio; 1552 off_t off; 1553 int ncookies = 0; 1554 1555 #ifdef MSDOSFS_DEBUG 1556 printf("msdosfs_readdir(): vp %08x, uio %08x, cred %08x, eofflagp %08x\n", 1557 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1558 #endif 1559 1560 /* 1561 * msdosfs_readdir() won't operate properly on regular files since 1562 * it does i/o only with the the filesystem vnode, and hence can 1563 * retrieve the wrong block from the buffer cache for a plain file. 1564 * So, fail attempts to readdir() on a plain file. 1565 */ 1566 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1567 return ENOTDIR; 1568 1569 /* 1570 * If the user buffer is smaller than the size of one dos directory 1571 * entry or the file offset is not a multiple of the size of a 1572 * directory entry, then we fail the read. 1573 */ 1574 count = uio->uio_resid & ~(sizeof(struct direntry) - 1); 1575 lost = uio->uio_resid - count; 1576 if (count < sizeof(struct direntry) || 1577 (uio->uio_offset & (sizeof(struct direntry) - 1))) 1578 return EINVAL; 1579 uio->uio_resid = count; 1580 uio->uio_iov->iov_len = count; 1581 off = uio->uio_offset; 1582 1583 /* 1584 * If they are reading from the root directory then, we simulate 1585 * the . and .. entries since these don't exist in the root 1586 * directory. We also set the offset bias to make up for having to 1587 * simulate these entries. By this I mean that at file offset 64 we 1588 * read the first entry in the root directory that lives on disk. 1589 */ 1590 if (dep->de_StartCluster == MSDOSFSROOT) { 1591 /* 1592 * printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1593 * uio->uio_offset); 1594 */ 1595 bias = 2 * sizeof(struct direntry); 1596 if (uio->uio_offset < 2 * sizeof(struct direntry)) { 1597 if (uio->uio_offset 1598 && uio->uio_offset != sizeof(struct direntry)) { 1599 error = EINVAL; 1600 goto out; 1601 } 1602 n = 1; 1603 if (!uio->uio_offset) { 1604 n = 2; 1605 ncookies++; 1606 } 1607 ncookies++; 1608 error = uiomove((char *) rootdots + uio->uio_offset, 1609 n * sizeof(struct direntry), uio); 1610 } 1611 } 1612 while (!error && uio->uio_resid > 0) { 1613 lbn = (uio->uio_offset - bias) >> pmp->pm_cnshift; 1614 on = (uio->uio_offset - bias) & pmp->pm_crbomask; 1615 n = min((u_long) (pmp->pm_bpcluster - on), uio->uio_resid); 1616 diff = dep->de_FileSize - (uio->uio_offset - bias); 1617 if (diff <= 0) 1618 break; 1619 if (diff < n) 1620 n = diff; 1621 error = pcbmap(dep, lbn, &bn, &cn); 1622 if (error) 1623 break; 1624 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, NOCRED, &bp); 1625 n = min(n, pmp->pm_bpcluster - bp->b_resid); 1626 if (error) { 1627 brelse(bp); 1628 return error; 1629 } 1630 1631 /* 1632 * code to convert from dos directory entries to ufs 1633 * directory entries 1634 */ 1635 pushout = 0; 1636 dentp = (struct direntry *)(bp->b_data + on); 1637 prev = 0; 1638 crnt = (struct dirent *) dirbuf; 1639 while ((char *) dentp < bp->b_data + on + n) { 1640 /* 1641 * printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1642 * dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1643 */ 1644 /* 1645 * If we have an empty entry or a slot from a 1646 * deleted file, or a volume label entry just 1647 * concatenate its space onto the end of the 1648 * previous entry or, manufacture an empty entry if 1649 * there is no previous entry. 1650 */ 1651 if (dentp->deName[0] == SLOT_EMPTY || 1652 dentp->deName[0] == SLOT_DELETED || 1653 (dentp->deAttributes & ATTR_VOLUME)) { 1654 if (prev) { 1655 prev->d_reclen += sizeof(struct direntry); 1656 } else { 1657 prev = crnt; 1658 prev->d_fileno = 0; 1659 prev->d_reclen = sizeof(struct direntry); 1660 prev->d_type = DT_UNKNOWN; 1661 prev->d_namlen = 0; 1662 prev->d_name[0] = 0; 1663 ncookies++; 1664 } 1665 } else { 1666 /* 1667 * this computation of d_fileno must match 1668 * the computation of va_fileid in 1669 * msdosfs_getattr 1670 */ 1671 if (dentp->deAttributes & ATTR_DIRECTORY) { 1672 /* if this is the root directory */ 1673 fileno = getushort(dentp->deStartCluster); 1674 if (fileno == MSDOSFSROOT) 1675 fileno = 1; 1676 } else { 1677 /* 1678 * if the file's dirent lives in 1679 * root dir 1680 */ 1681 if ((fileno = cn) == MSDOSFSROOT) 1682 fileno = 1; 1683 fileno = (fileno << 16) | 1684 ((dentp - (struct direntry *) bp->b_data) & 0xffff); 1685 } 1686 crnt->d_fileno = fileno; 1687 crnt->d_reclen = sizeof(struct direntry); 1688 crnt->d_type = (dentp->deAttributes & ATTR_DIRECTORY) 1689 ? DT_DIR : DT_REG; 1690 crnt->d_namlen = dos2unixfn(dentp->deName, 1691 (u_char *)crnt->d_name); 1692 /* 1693 * printf("readdir: file %s, fileno %08x, attr %02x, start %08x\n", 1694 * crnt->d_name, crnt->d_fileno, dentp->deAttributes, 1695 * dentp->deStartCluster); 1696 */ 1697 prev = crnt; 1698 ncookies++; 1699 } 1700 dentp++; 1701 1702 crnt = (struct dirent *) ((char *) crnt + sizeof(struct direntry)); 1703 pushout = 1; 1704 1705 /* 1706 * If our intermediate buffer is full then copy its 1707 * contents to user space. I would just use the 1708 * buffer the buf header points to but, I'm afraid 1709 * that when we brelse() it someone else might find 1710 * it in the cache and think its contents are 1711 * valid. Maybe there is a way to invalidate the 1712 * buffer before brelse()'ing it. 1713 */ 1714 if ((u_char *) crnt >= &dirbuf[sizeof dirbuf]) { 1715 pushout = 0; 1716 error = uiomove(dirbuf, sizeof(dirbuf), uio); 1717 if (error) 1718 break; 1719 prev = 0; 1720 crnt = (struct dirent *) dirbuf; 1721 } 1722 } 1723 if (pushout) { 1724 pushout = 0; 1725 error = uiomove(dirbuf, (char *) crnt - (char *) dirbuf, 1726 uio); 1727 } 1728 1729 #if 0 1730 /* 1731 * If we have read everything from this block or have read 1732 * to end of file then we are done with this block. Mark 1733 * it to say the buffer can be reused if need be. 1734 */ 1735 if (n + on == pmp->pm_bpcluster || 1736 (uio->uio_offset - bias) == dep->de_FileSize) 1737 bp->b_flags |= B_AGE; 1738 #endif /* if 0 */ 1739 brelse(bp); 1740 if (n == 0) 1741 break; 1742 } 1743 out: ; 1744 uio->uio_resid += lost; 1745 if (!error && ap->a_ncookies != NULL) { 1746 struct dirent* dpStart; 1747 struct dirent* dpEnd; 1748 struct dirent* dp; 1749 u_int *cookies; 1750 u_int *cookiep; 1751 1752 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 1753 panic("msdosfs_readdir: unexpected uio from NFS server"); 1754 dpStart = (struct dirent *) 1755 (uio->uio_iov->iov_base - (uio->uio_offset - off)); 1756 dpEnd = (struct dirent *) uio->uio_iov->iov_base; 1757 MALLOC(cookies, u_int *, ncookies * sizeof(u_int), 1758 M_TEMP, M_WAITOK); 1759 for (dp = dpStart, cookiep = cookies; 1760 dp < dpEnd; 1761 dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) { 1762 off += dp->d_reclen; 1763 *cookiep++ = (u_int) off; 1764 } 1765 *ap->a_ncookies = ncookies; 1766 *ap->a_cookies = cookies; 1767 } 1768 1769 /* 1770 * Set the eofflag (NFS uses it) 1771 */ 1772 if (ap->a_eofflag) 1773 if (dep->de_FileSize - (uio->uio_offset - bias) <= 0) 1774 *ap->a_eofflag = 1; 1775 else 1776 *ap->a_eofflag = 0; 1777 1778 return error; 1779 } 1780 1781 /* 1782 * DOS filesystems don't know what symlinks are. 1783 */ 1784 static int 1785 msdosfs_readlink(ap) 1786 struct vop_readlink_args /* { 1787 struct vnode *a_vp; 1788 struct uio *a_uio; 1789 struct ucred *a_cred; 1790 } */ *ap; 1791 { 1792 return EINVAL; 1793 } 1794 1795 static int 1796 msdosfs_abortop(ap) 1797 struct vop_abortop_args /* { 1798 struct vnode *a_dvp; 1799 struct componentname *a_cnp; 1800 } */ *ap; 1801 { 1802 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 1803 FREE(ap->a_cnp->cn_pnbuf, M_NAMEI); 1804 return 0; 1805 } 1806 1807 static int 1808 msdosfs_lock(ap) 1809 struct vop_lock_args /* { 1810 struct vnode *a_vp; 1811 } */ *ap; 1812 { 1813 struct denode *dep = VTODE(ap->a_vp); 1814 1815 while (dep->de_flag & DE_LOCKED) { 1816 dep->de_flag |= DE_WANTED; 1817 if (dep->de_lockholder == curproc->p_pid) 1818 panic("msdosfs_lock: locking against myself"); 1819 dep->de_lockwaiter = curproc->p_pid; 1820 (void) tsleep((caddr_t) dep, PINOD, "msdlck", 0); 1821 } 1822 dep->de_lockwaiter = 0; 1823 dep->de_lockholder = curproc->p_pid; 1824 dep->de_flag |= DE_LOCKED; 1825 return 0; 1826 } 1827 1828 static int 1829 msdosfs_unlock(ap) 1830 struct vop_unlock_args /* { 1831 struct vnode *vp; 1832 } */ *ap; 1833 { 1834 struct denode *dep = VTODE(ap->a_vp); 1835 1836 if (!(dep->de_flag & DE_LOCKED)) 1837 panic("msdosfs_unlock: denode not locked"); 1838 dep->de_lockholder = 0; 1839 dep->de_flag &= ~DE_LOCKED; 1840 if (dep->de_flag & DE_WANTED) { 1841 dep->de_flag &= ~DE_WANTED; 1842 wakeup((caddr_t) dep); 1843 } 1844 return 0; 1845 } 1846 1847 static int 1848 msdosfs_islocked(ap) 1849 struct vop_islocked_args /* { 1850 struct vnode *a_vp; 1851 } */ *ap; 1852 { 1853 return VTODE(ap->a_vp)->de_flag & DE_LOCKED ? 1 : 0; 1854 } 1855 1856 /* 1857 * vp - address of vnode file the file 1858 * bn - which cluster we are interested in mapping to a filesystem block number. 1859 * vpp - returns the vnode for the block special file holding the filesystem 1860 * containing the file of interest 1861 * bnp - address of where to return the filesystem relative block number 1862 */ 1863 static int 1864 msdosfs_bmap(ap) 1865 struct vop_bmap_args /* { 1866 struct vnode *a_vp; 1867 daddr_t a_bn; 1868 struct vnode **a_vpp; 1869 daddr_t *a_bnp; 1870 int *a_runp; 1871 int *a_runb; 1872 } */ *ap; 1873 { 1874 struct denode *dep = VTODE(ap->a_vp); 1875 1876 if (ap->a_vpp != NULL) 1877 *ap->a_vpp = dep->de_devvp; 1878 if (ap->a_bnp == NULL) 1879 return 0; 1880 if (ap->a_runp) { 1881 /* 1882 * Sequential clusters should be counted here. 1883 */ 1884 *ap->a_runp = 0; 1885 } 1886 if (ap->a_runb) { 1887 *ap->a_runb = 0; 1888 } 1889 return pcbmap(dep, ap->a_bn, ap->a_bnp, 0); 1890 } 1891 1892 static int 1893 msdosfs_reallocblks(ap) 1894 struct vop_reallocblks_args /* { 1895 struct vnode *a_vp; 1896 struct cluster_save *a_buflist; 1897 } */ *ap; 1898 { 1899 /* Currently no support for clustering */ /* XXX */ 1900 return ENOSPC; 1901 } 1902 1903 static int 1904 msdosfs_strategy(ap) 1905 struct vop_strategy_args /* { 1906 struct buf *a_bp; 1907 } */ *ap; 1908 { 1909 struct buf *bp = ap->a_bp; 1910 struct denode *dep = VTODE(bp->b_vp); 1911 struct vnode *vp; 1912 int error = 0; 1913 1914 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1915 panic("msdosfs_strategy: spec"); 1916 /* 1917 * If we don't already know the filesystem relative block number 1918 * then get it using pcbmap(). If pcbmap() returns the block 1919 * number as -1 then we've got a hole in the file. DOS filesystems 1920 * don't allow files with holes, so we shouldn't ever see this. 1921 */ 1922 if (bp->b_blkno == bp->b_lblkno) { 1923 error = pcbmap(dep, bp->b_lblkno, &bp->b_blkno, 0); 1924 if (error) 1925 bp->b_blkno = -1; 1926 if (bp->b_blkno == -1) 1927 clrbuf(bp); 1928 } 1929 if (bp->b_blkno == -1) { 1930 biodone(bp); 1931 return error; 1932 } 1933 #ifdef DIAGNOSTIC 1934 #endif 1935 /* 1936 * Read/write the block from/to the disk that contains the desired 1937 * file block. 1938 */ 1939 vp = dep->de_devvp; 1940 bp->b_dev = vp->v_rdev; 1941 VOCALL(vp->v_op, VOFFSET(vop_strategy), ap); 1942 return 0; 1943 } 1944 1945 static int 1946 msdosfs_print(ap) 1947 struct vop_print_args /* { 1948 struct vnode *vp; 1949 } */ *ap; 1950 { 1951 struct denode *dep = VTODE(ap->a_vp); 1952 1953 printf( 1954 "tag VT_MSDOSFS, startcluster %d, dircluster %ld, diroffset %ld ", 1955 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1956 printf(" dev %d, %d, %s\n", 1957 major(dep->de_dev), minor(dep->de_dev), 1958 dep->de_flag & DE_LOCKED ? "(LOCKED)" : ""); 1959 if (dep->de_lockholder) { 1960 printf(" owner pid %d", (int)dep->de_lockholder); 1961 if (dep->de_lockwaiter) 1962 printf(" waiting pid %d", (int)dep->de_lockwaiter); 1963 printf("\n"); 1964 } 1965 return 0; 1966 } 1967 1968 static int 1969 msdosfs_advlock(ap) 1970 struct vop_advlock_args /* { 1971 struct vnode *a_vp; 1972 caddr_t a_id; 1973 int a_op; 1974 struct flock *a_fl; 1975 int a_flags; 1976 } */ *ap; 1977 { 1978 return EINVAL; /* we don't do locking yet */ 1979 } 1980 1981 static int 1982 msdosfs_pathconf(ap) 1983 struct vop_pathconf_args /* { 1984 struct vnode *a_vp; 1985 int a_name; 1986 int *a_retval; 1987 } */ *ap; 1988 { 1989 switch (ap->a_name) { 1990 case _PC_LINK_MAX: 1991 *ap->a_retval = 1; 1992 return 0; 1993 case _PC_NAME_MAX: 1994 *ap->a_retval = 12; 1995 return 0; 1996 case _PC_PATH_MAX: 1997 *ap->a_retval = PATH_MAX; /* 255? */ 1998 return 0; 1999 case _PC_CHOWN_RESTRICTED: 2000 *ap->a_retval = 1; 2001 return 0; 2002 case _PC_NO_TRUNC: 2003 *ap->a_retval = 0; 2004 return 0; 2005 default: 2006 return EINVAL; 2007 } 2008 } 2009 2010 /* Global vfs data structures for msdosfs */ 2011 vop_t **msdosfs_vnodeop_p; 2012 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 2013 { &vop_default_desc, (vop_t *)vn_default_error }, 2014 { &vop_lookup_desc, (vop_t *)msdosfs_lookup }, /* lookup */ 2015 { &vop_create_desc, (vop_t *)msdosfs_create }, /* create */ 2016 { &vop_mknod_desc, (vop_t *)msdosfs_mknod }, /* mknod */ 2017 { &vop_open_desc, (vop_t *)msdosfs_open }, /* open */ 2018 { &vop_close_desc, (vop_t *)msdosfs_close }, /* close */ 2019 { &vop_access_desc, (vop_t *)msdosfs_access }, /* access */ 2020 { &vop_getattr_desc, (vop_t *)msdosfs_getattr }, /* getattr */ 2021 { &vop_setattr_desc, (vop_t *)msdosfs_setattr }, /* setattr */ 2022 { &vop_read_desc, (vop_t *)msdosfs_read }, /* read */ 2023 { &vop_write_desc, (vop_t *)msdosfs_write }, /* write */ 2024 { &vop_ioctl_desc, (vop_t *)msdosfs_ioctl }, /* ioctl */ 2025 { &vop_select_desc, (vop_t *)msdosfs_select }, /* select */ 2026 { &vop_mmap_desc, (vop_t *)msdosfs_mmap }, /* mmap */ 2027 { &vop_fsync_desc, (vop_t *)msdosfs_fsync }, /* fsync */ 2028 { &vop_seek_desc, (vop_t *)msdosfs_seek }, /* seek */ 2029 { &vop_remove_desc, (vop_t *)msdosfs_remove }, /* remove */ 2030 { &vop_link_desc, (vop_t *)msdosfs_link }, /* link */ 2031 { &vop_rename_desc, (vop_t *)msdosfs_rename }, /* rename */ 2032 { &vop_mkdir_desc, (vop_t *)msdosfs_mkdir }, /* mkdir */ 2033 { &vop_rmdir_desc, (vop_t *)msdosfs_rmdir }, /* rmdir */ 2034 { &vop_symlink_desc, (vop_t *)msdosfs_symlink }, /* symlink */ 2035 { &vop_readdir_desc, (vop_t *)msdosfs_readdir }, /* readdir */ 2036 { &vop_readlink_desc, (vop_t *)msdosfs_readlink }, /* readlink */ 2037 { &vop_abortop_desc, (vop_t *)msdosfs_abortop }, /* abortop */ 2038 { &vop_inactive_desc, (vop_t *)msdosfs_inactive }, /* inactive */ 2039 { &vop_reclaim_desc, (vop_t *)msdosfs_reclaim }, /* reclaim */ 2040 { &vop_lock_desc, (vop_t *)msdosfs_lock }, /* lock */ 2041 { &vop_unlock_desc, (vop_t *)msdosfs_unlock }, /* unlock */ 2042 { &vop_bmap_desc, (vop_t *)msdosfs_bmap }, /* bmap */ 2043 { &vop_strategy_desc, (vop_t *)msdosfs_strategy }, /* strategy */ 2044 { &vop_print_desc, (vop_t *)msdosfs_print }, /* print */ 2045 { &vop_islocked_desc, (vop_t *)msdosfs_islocked }, /* islocked */ 2046 { &vop_pathconf_desc, (vop_t *)msdosfs_pathconf }, /* pathconf */ 2047 { &vop_advlock_desc, (vop_t *)msdosfs_advlock }, /* advlock */ 2048 { &vop_reallocblks_desc, (vop_t *)msdosfs_reallocblks }, /* reallocblks */ 2049 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 2050 { NULL, NULL } 2051 }; 2052 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 2053 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 2054 2055 VNODEOP_SET(msdosfs_vnodeop_opv_desc); 2056