1 /* $FreeBSD: src/sys/msdosfs/msdosfs_vnops.c,v 1.95.2.4 2003/06/13 15:05:47 trhodes Exp $ */ 2 /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vnops.c,v 1.47 2007/05/09 00:53:35 dillon Exp $ */ 3 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 4 5 /*- 6 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 7 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 8 * All rights reserved. 9 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by TooLs GmbH. 22 * 4. The name of TooLs GmbH may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 /* 37 * Written by Paul Popelka (paulp@uts.amdahl.com) 38 * 39 * You can do anything you want with this software, just don't say you wrote 40 * it, and don't remove this notice. 41 * 42 * This software is provided "as is". 43 * 44 * The author supplies this software to be publicly redistributed on the 45 * understanding that the author is not responsible for the correct 46 * functioning of this software in any circumstances and is not liable for 47 * any damages caused by this software. 48 * 49 * October 1992 50 */ 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 55 #include <sys/kernel.h> 56 #include <sys/stat.h> 57 #include <sys/buf.h> 58 #include <sys/proc.h> 59 #include <sys/namei.h> 60 #include <sys/mount.h> 61 #include <sys/unistd.h> 62 #include <sys/vnode.h> 63 #include <sys/malloc.h> 64 #include <sys/dirent.h> 65 #include <sys/signalvar.h> 66 67 #include <vm/vm.h> 68 #include <vm/vm_extern.h> 69 #include <vm/vm_zone.h> 70 #include <vm/vnode_pager.h> 71 72 #include <sys/buf2.h> 73 74 #include "bpb.h" 75 #include "direntry.h" 76 #include "denode.h" 77 #include "msdosfsmount.h" 78 #include "fat.h" 79 80 #define DOS_FILESIZE_MAX 0xffffffff 81 82 /* 83 * Prototypes for MSDOSFS vnode operations 84 */ 85 static int msdosfs_create (struct vop_old_create_args *); 86 static int msdosfs_mknod (struct vop_old_mknod_args *); 87 static int msdosfs_open (struct vop_open_args *); 88 static int msdosfs_close (struct vop_close_args *); 89 static int msdosfs_access (struct vop_access_args *); 90 static int msdosfs_getattr (struct vop_getattr_args *); 91 static int msdosfs_setattr (struct vop_setattr_args *); 92 static int msdosfs_read (struct vop_read_args *); 93 static int msdosfs_write (struct vop_write_args *); 94 static int msdosfs_fsync (struct vop_fsync_args *); 95 static int msdosfs_remove (struct vop_old_remove_args *); 96 static int msdosfs_link (struct vop_old_link_args *); 97 static int msdosfs_rename (struct vop_old_rename_args *); 98 static int msdosfs_mkdir (struct vop_old_mkdir_args *); 99 static int msdosfs_rmdir (struct vop_old_rmdir_args *); 100 static int msdosfs_symlink (struct vop_old_symlink_args *); 101 static int msdosfs_readdir (struct vop_readdir_args *); 102 static int msdosfs_bmap (struct vop_bmap_args *); 103 static int msdosfs_strategy (struct vop_strategy_args *); 104 static int msdosfs_print (struct vop_print_args *); 105 static int msdosfs_pathconf (struct vop_pathconf_args *ap); 106 static int msdosfs_getpages (struct vop_getpages_args *); 107 static int msdosfs_putpages (struct vop_putpages_args *); 108 109 /* 110 * Some general notes: 111 * 112 * In the ufs filesystem the inodes, superblocks, and indirect blocks are 113 * read/written using the vnode for the filesystem. Blocks that represent 114 * the contents of a file are read/written using the vnode for the file 115 * (including directories when they are read/written as files). This 116 * presents problems for the dos filesystem because data that should be in 117 * an inode (if dos had them) resides in the directory itself. Since we 118 * must update directory entries without the benefit of having the vnode 119 * for the directory we must use the vnode for the filesystem. This means 120 * that when a directory is actually read/written (via read, write, or 121 * readdir, or seek) we must use the vnode for the filesystem instead of 122 * the vnode for the directory as would happen in ufs. This is to insure we 123 * retreive the correct block from the buffer cache since the hash value is 124 * based upon the vnode address and the desired block number. 125 */ 126 127 /* 128 * Create a regular file. On entry the directory to contain the file being 129 * created is locked. We must release before we return. 130 * 131 * msdosfs_create(struct vnode *a_dvp, struct vnode **a_vpp, 132 * struct componentname *a_cnp, struct vattr *a_vap) 133 */ 134 static int 135 msdosfs_create(struct vop_old_create_args *ap) 136 { 137 struct componentname *cnp = ap->a_cnp; 138 struct denode ndirent; 139 struct denode *dep; 140 struct denode *pdep = VTODE(ap->a_dvp); 141 struct timespec ts; 142 int error; 143 144 #ifdef MSDOSFS_DEBUG 145 kprintf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 146 #endif 147 148 /* 149 * If this is the root directory and there is no space left we 150 * can't do anything. This is because the root directory can not 151 * change size. 152 */ 153 if (pdep->de_StartCluster == MSDOSFSROOT 154 && pdep->de_fndoffset >= pdep->de_FileSize) { 155 error = ENOSPC; 156 goto bad; 157 } 158 159 /* 160 * Create a directory entry for the file, then call createde() to 161 * have it installed. NOTE: DOS files are always executable. We 162 * use the absence of the owner write bit to make the file 163 * readonly. 164 */ 165 bzero(&ndirent, sizeof(ndirent)); 166 error = uniqdosname(pdep, cnp, ndirent.de_Name); 167 if (error) 168 goto bad; 169 170 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 171 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 172 ndirent.de_LowerCase = 0; 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 ndirent.de_pmp = pdep->de_pmp; 178 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 179 getnanotime(&ts); 180 DETIMES(&ndirent, &ts, &ts, &ts); 181 error = createde(&ndirent, pdep, &dep, cnp); 182 if (error) 183 goto bad; 184 *ap->a_vpp = DETOV(dep); 185 return (0); 186 187 bad: 188 return (error); 189 } 190 191 /* 192 * msdosfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, 193 * struct componentname *a_cnp, struct vattr *a_vap) 194 */ 195 static int 196 msdosfs_mknod(struct vop_old_mknod_args *ap) 197 { 198 switch (ap->a_vap->va_type) { 199 case VDIR: 200 return (msdosfs_mkdir((struct vop_old_mkdir_args *)ap)); 201 break; 202 203 case VREG: 204 return (msdosfs_create((struct vop_old_create_args *)ap)); 205 break; 206 207 default: 208 return (EINVAL); 209 } 210 /* NOTREACHED */ 211 } 212 213 /* 214 * msdosfs_open(struct vnode *a_vp) 215 */ 216 static int 217 msdosfs_open(struct vop_open_args *ap) 218 { 219 return(vop_stdopen(ap)); 220 } 221 222 /* 223 * msdosfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred, 224 * struct thread *a_td) 225 */ 226 static int 227 msdosfs_close(struct vop_close_args *ap) 228 { 229 struct vnode *vp = ap->a_vp; 230 struct denode *dep = VTODE(vp); 231 struct timespec ts; 232 233 if (vp->v_sysref.refcnt > 1) { 234 getnanotime(&ts); 235 DETIMES(dep, &ts, &ts, &ts); 236 } 237 return (vop_stdclose(ap)); 238 } 239 240 /* 241 * msdosfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 242 * struct thread *a_td) 243 */ 244 static int 245 msdosfs_access(struct vop_access_args *ap) 246 { 247 struct vnode *vp = ap->a_vp; 248 struct denode *dep = VTODE(ap->a_vp); 249 struct msdosfsmount *pmp = dep->de_pmp; 250 struct ucred *cred = ap->a_cred; 251 mode_t mask, file_mode, mode = ap->a_mode; 252 gid_t *gp; 253 int i; 254 255 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 256 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 257 file_mode &= pmp->pm_mask; 258 259 /* 260 * Disallow write attempts on read-only file systems; 261 * unless the file is a socket, fifo, or a block or 262 * character device resident on the file system. 263 */ 264 if (mode & VWRITE) { 265 switch (vp->v_type) { 266 case VDIR: 267 case VLNK: 268 case VREG: 269 if (vp->v_mount->mnt_flag & MNT_RDONLY) 270 return (EROFS); 271 break; 272 default: 273 break; 274 } 275 } 276 277 /* User id 0 always gets access. */ 278 if (cred->cr_uid == 0) 279 return 0; 280 281 mask = 0; 282 283 /* Otherwise, check the owner. */ 284 if (cred->cr_uid == pmp->pm_uid) { 285 if (mode & VEXEC) 286 mask |= S_IXUSR; 287 if (mode & VREAD) 288 mask |= S_IRUSR; 289 if (mode & VWRITE) 290 mask |= S_IWUSR; 291 return (file_mode & mask) == mask ? 0 : EACCES; 292 } 293 294 /* Otherwise, check the groups. */ 295 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 296 if (pmp->pm_gid == *gp) { 297 if (mode & VEXEC) 298 mask |= S_IXGRP; 299 if (mode & VREAD) 300 mask |= S_IRGRP; 301 if (mode & VWRITE) 302 mask |= S_IWGRP; 303 return (file_mode & mask) == mask ? 0 : EACCES; 304 } 305 306 /* Otherwise, check everyone else. */ 307 if (mode & VEXEC) 308 mask |= S_IXOTH; 309 if (mode & VREAD) 310 mask |= S_IROTH; 311 if (mode & VWRITE) 312 mask |= S_IWOTH; 313 return (file_mode & mask) == mask ? 0 : EACCES; 314 } 315 316 /* 317 * msdosfs_getattr(struct vnode *a_vp, struct vattr *a_vap, 318 * struct ucred *a_cred, struct thread *a_td) 319 */ 320 static int 321 msdosfs_getattr(struct vop_getattr_args *ap) 322 { 323 struct denode *dep = VTODE(ap->a_vp); 324 struct msdosfsmount *pmp = dep->de_pmp; 325 struct vattr *vap = ap->a_vap; 326 mode_t mode; 327 struct timespec ts; 328 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 329 u_long fileid; 330 331 getnanotime(&ts); 332 DETIMES(dep, &ts, &ts, &ts); 333 vap->va_fsid = dev2udev(dep->de_dev); 334 /* 335 * The following computation of the fileid must be the same as that 336 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 337 * doesn't work. 338 */ 339 if (dep->de_Attributes & ATTR_DIRECTORY) { 340 fileid = xcntobn(pmp, dep->de_StartCluster) * dirsperblk; 341 if (dep->de_StartCluster == MSDOSFSROOT) 342 fileid = 1; 343 } else { 344 fileid = xcntobn(pmp, dep->de_dirclust) * dirsperblk; 345 if (dep->de_dirclust == MSDOSFSROOT) 346 fileid = roottobn(pmp, 0) * dirsperblk; 347 fileid += dep->de_diroffset / sizeof(struct direntry); 348 } 349 vap->va_fileid = fileid; 350 if ((dep->de_Attributes & ATTR_READONLY) == 0) 351 mode = S_IRWXU|S_IRWXG|S_IRWXO; 352 else 353 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 354 vap->va_mode = mode & pmp->pm_mask; 355 vap->va_uid = pmp->pm_uid; 356 vap->va_gid = pmp->pm_gid; 357 vap->va_nlink = 1; 358 vap->va_rmajor = VNOVAL; 359 vap->va_rminor = VNOVAL; 360 vap->va_size = dep->de_FileSize; 361 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 362 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 363 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 364 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 365 } else { 366 vap->va_atime = vap->va_mtime; 367 vap->va_ctime = vap->va_mtime; 368 } 369 vap->va_flags = 0; 370 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 371 vap->va_flags |= SF_ARCHIVED; 372 vap->va_gen = 0; 373 vap->va_blocksize = pmp->pm_bpcluster; 374 vap->va_bytes = 375 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 376 vap->va_type = ap->a_vp->v_type; 377 vap->va_filerev = dep->de_modrev; 378 return (0); 379 } 380 381 /* 382 * msdosfs_setattr(struct vnode *a_vp, struct vattr *a_vap, 383 * struct ucred *a_cred, struct thread *a_td) 384 */ 385 static int 386 msdosfs_setattr(struct vop_setattr_args *ap) 387 { 388 struct vnode *vp = ap->a_vp; 389 struct denode *dep = VTODE(ap->a_vp); 390 struct msdosfsmount *pmp = dep->de_pmp; 391 struct vattr *vap = ap->a_vap; 392 struct ucred *cred = ap->a_cred; 393 int error = 0; 394 395 #ifdef MSDOSFS_DEBUG 396 kprintf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 397 ap->a_vp, vap, cred, ap->a_td); 398 #endif 399 400 /* 401 * Check for unsettable attributes. 402 */ 403 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 404 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 405 (vap->va_blocksize != VNOVAL) || (vap->va_rmajor != VNOVAL) || 406 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 407 #ifdef MSDOSFS_DEBUG 408 kprintf("msdosfs_setattr(): returning EINVAL\n"); 409 kprintf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 410 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 411 kprintf(" va_blocksize %lx, va_rmajor %x, va_bytes %qx, va_gen %lx\n", 412 vap->va_blocksize, vap->va_rmajor, vap->va_bytes, vap->va_gen); 413 kprintf(" va_uid %x, va_gid %x\n", 414 vap->va_uid, vap->va_gid); 415 #endif 416 return (EINVAL); 417 } 418 if (vap->va_flags != VNOVAL) { 419 if (vp->v_mount->mnt_flag & MNT_RDONLY) 420 return (EROFS); 421 if (cred->cr_uid != pmp->pm_uid && 422 (error = suser_cred(cred, PRISON_ROOT))) 423 return (error); 424 /* 425 * We are very inconsistent about handling unsupported 426 * attributes. We ignored the access time and the 427 * read and execute bits. We were strict for the other 428 * attributes. 429 * 430 * Here we are strict, stricter than ufs in not allowing 431 * users to attempt to set SF_SETTABLE bits or anyone to 432 * set unsupported bits. However, we ignore attempts to 433 * set ATTR_ARCHIVE for directories `cp -pr' from a more 434 * sensible file system attempts it a lot. 435 */ 436 if (cred->cr_uid != 0) { 437 if (vap->va_flags & SF_SETTABLE) 438 return EPERM; 439 } 440 if (vap->va_flags & ~SF_ARCHIVED) 441 return EOPNOTSUPP; 442 if (vap->va_flags & SF_ARCHIVED) 443 dep->de_Attributes &= ~ATTR_ARCHIVE; 444 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 445 dep->de_Attributes |= ATTR_ARCHIVE; 446 dep->de_flag |= DE_MODIFIED; 447 } 448 449 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 450 uid_t uid; 451 gid_t gid; 452 453 if (vp->v_mount->mnt_flag & MNT_RDONLY) 454 return (EROFS); 455 uid = vap->va_uid; 456 if (uid == (uid_t)VNOVAL) 457 uid = pmp->pm_uid; 458 gid = vap->va_gid; 459 if (gid == (gid_t)VNOVAL) 460 gid = pmp->pm_gid; 461 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 462 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 463 (error = suser_cred(cred, PRISON_ROOT))) 464 return error; 465 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 466 return EINVAL; 467 } 468 469 if (vap->va_size != VNOVAL) { 470 /* 471 * Disallow write attempts on read-only file systems; 472 * unless the file is a socket, fifo, or a block or 473 * character device resident on the file system. 474 */ 475 switch (vp->v_type) { 476 case VDIR: 477 return (EISDIR); 478 /* NOT REACHED */ 479 case VLNK: 480 case VREG: 481 if (vp->v_mount->mnt_flag & MNT_RDONLY) 482 return (EROFS); 483 break; 484 default: 485 break; 486 } 487 error = detrunc(dep, vap->va_size, 0); 488 if (error) 489 return error; 490 } 491 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 492 if (vp->v_mount->mnt_flag & MNT_RDONLY) 493 return (EROFS); 494 if (cred->cr_uid != pmp->pm_uid && 495 (error = suser_cred(cred, PRISON_ROOT)) && 496 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 497 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred)))) 498 return (error); 499 if (vp->v_type != VDIR) { 500 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 501 vap->va_atime.tv_sec != VNOVAL) { 502 dep->de_flag &= ~DE_ACCESS; 503 unix2dostime(&vap->va_atime, &dep->de_ADate, 504 NULL, NULL); 505 } 506 if (vap->va_mtime.tv_sec != VNOVAL) { 507 dep->de_flag &= ~DE_UPDATE; 508 unix2dostime(&vap->va_mtime, &dep->de_MDate, 509 &dep->de_MTime, NULL); 510 } 511 dep->de_Attributes |= ATTR_ARCHIVE; 512 dep->de_flag |= DE_MODIFIED; 513 } 514 } 515 /* 516 * DOS files only have the ability to have their writability 517 * attribute set, so we use the owner write bit to set the readonly 518 * attribute. 519 */ 520 if (vap->va_mode != (mode_t)VNOVAL) { 521 if (vp->v_mount->mnt_flag & MNT_RDONLY) 522 return (EROFS); 523 if (cred->cr_uid != pmp->pm_uid && 524 (error = suser_cred(cred, PRISON_ROOT))) 525 return (error); 526 if (vp->v_type != VDIR) { 527 /* We ignore the read and execute bits. */ 528 if (vap->va_mode & VWRITE) 529 dep->de_Attributes &= ~ATTR_READONLY; 530 else 531 dep->de_Attributes |= ATTR_READONLY; 532 dep->de_Attributes |= ATTR_ARCHIVE; 533 dep->de_flag |= DE_MODIFIED; 534 } 535 } 536 return (deupdat(dep, 1)); 537 } 538 539 /* 540 * msdosfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 541 * struct ucred *a_cred) 542 */ 543 static int 544 msdosfs_read(struct vop_read_args *ap) 545 { 546 int error = 0; 547 int blsize; 548 int isadir; 549 int orig_resid; 550 u_int n; 551 u_long diff; 552 u_long on; 553 daddr_t lbn; 554 daddr_t rablock; 555 off_t raoffset; 556 off_t loffset; 557 int rasize; 558 int seqcount; 559 struct buf *bp; 560 struct vnode *vp = ap->a_vp; 561 struct denode *dep = VTODE(vp); 562 struct msdosfsmount *pmp = dep->de_pmp; 563 struct uio *uio = ap->a_uio; 564 565 if (uio->uio_offset < 0) 566 return (EINVAL); 567 568 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 569 return (0); 570 /* 571 * If they didn't ask for any data, then we are done. 572 */ 573 orig_resid = uio->uio_resid; 574 if (orig_resid <= 0) 575 return (0); 576 577 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 578 579 isadir = dep->de_Attributes & ATTR_DIRECTORY; 580 do { 581 if (uio->uio_offset >= dep->de_FileSize) 582 break; 583 584 /* 585 * note: lbn is a cluster number, not a device block number. 586 */ 587 lbn = de_off2cn(pmp, uio->uio_offset); 588 loffset = de_cn2doff(pmp, lbn); 589 590 /* 591 * If we are operating on a directory file then be sure to 592 * do i/o with the vnode for the filesystem instead of the 593 * vnode for the directory. 594 */ 595 if (isadir) { 596 /* 597 * convert cluster # to block #. lbn is a 598 * device block number after this. 599 */ 600 error = pcbmap(dep, lbn, &lbn, NULL, &blsize); 601 loffset = de_bntodoff(pmp, lbn); 602 if (error == E2BIG) { 603 error = EINVAL; 604 break; 605 } else if (error) 606 break; 607 error = bread(pmp->pm_devvp, loffset, blsize, &bp); 608 } else { 609 blsize = pmp->pm_bpcluster; 610 rablock = lbn + 1; 611 raoffset = de_cn2doff(pmp, rablock); 612 if (seqcount > 1 && 613 raoffset < dep->de_FileSize) { 614 rasize = pmp->pm_bpcluster; 615 error = breadn(vp, loffset, blsize, 616 &raoffset, &rasize, 1, &bp); 617 } else { 618 error = bread(vp, loffset, blsize, &bp); 619 } 620 } 621 if (error) { 622 brelse(bp); 623 break; 624 } 625 on = uio->uio_offset & pmp->pm_crbomask; 626 diff = pmp->pm_bpcluster - on; 627 n = diff > uio->uio_resid ? uio->uio_resid : diff; 628 diff = dep->de_FileSize - uio->uio_offset; 629 if (diff < n) 630 n = diff; 631 diff = blsize - bp->b_resid; 632 if (diff < n) 633 n = diff; 634 error = uiomove(bp->b_data + on, (int) n, uio); 635 brelse(bp); 636 } while (error == 0 && uio->uio_resid > 0 && n != 0); 637 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 638 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 639 dep->de_flag |= DE_ACCESS; 640 return (error); 641 } 642 643 /* 644 * Write data to a file or directory. 645 * 646 * msdosfs_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 647 * struct ucred *a_cred) 648 */ 649 static int 650 msdosfs_write(struct vop_write_args *ap) 651 { 652 int n; 653 int croffset; 654 int resid; 655 u_long osize; 656 int error = 0; 657 u_long count; 658 daddr_t cn, lastcn; 659 struct buf *bp; 660 int ioflag = ap->a_ioflag; 661 struct uio *uio = ap->a_uio; 662 struct thread *td = uio->uio_td; 663 struct vnode *vp = ap->a_vp; 664 struct vnode *thisvp; 665 struct denode *dep = VTODE(vp); 666 struct msdosfsmount *pmp = dep->de_pmp; 667 struct proc *p = (td ? td->td_proc : NULL); 668 struct lwp *lp = (td ? td->td_lwp : NULL); 669 670 #ifdef MSDOSFS_DEBUG 671 kprintf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 672 vp, uio, ioflag, cred); 673 kprintf("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 lwpsignal(p, lp, 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); 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_off2cn(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 cn = de_off2cn(pmp, uio->uio_offset); 755 if ((uio->uio_offset & pmp->pm_crbomask) == 0 756 && (de_off2cn(pmp, uio->uio_offset + uio->uio_resid) 757 > de_off2cn(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, de_cn2doff(pmp, cn), 765 pmp->pm_bpcluster, 0, 0); 766 clrbuf(bp); 767 /* 768 * Do the bmap now, since pcbmap needs buffers 769 * for the fat table. (see msdosfs_strategy) 770 */ 771 if (bp->b_bio2.bio_offset == NOOFFSET) { 772 daddr_t lblkno = de_off2cn(pmp, bp->b_loffset); 773 daddr_t dblkno; 774 775 error = pcbmap(dep, lblkno, 776 &dblkno, NULL, NULL); 777 if (error || dblkno == (daddr_t)-1) { 778 bp->b_bio2.bio_offset = NOOFFSET; 779 } else { 780 bp->b_bio2.bio_offset = de_bntodoff(pmp, dblkno); 781 } 782 } 783 if (bp->b_bio2.bio_offset == NOOFFSET) { 784 brelse(bp); 785 if (!error) 786 error = EIO; /* XXX */ 787 break; 788 } 789 } else { 790 /* 791 * The block we need to write into exists, so read 792 * it in. 793 */ 794 error = bread(thisvp, de_cn2doff(pmp, cn), 795 pmp->pm_bpcluster, &bp); 796 if (error) { 797 brelse(bp); 798 break; 799 } 800 } 801 802 /* 803 * Should these vnode_pager_* functions be done on dir 804 * files? 805 */ 806 807 /* 808 * Copy the data from user space into the buf header. 809 */ 810 error = uiomove(bp->b_data + croffset, n, uio); 811 if (error) { 812 brelse(bp); 813 break; 814 } 815 816 /* 817 * If they want this synchronous then write it and wait for 818 * it. Otherwise, if on a cluster boundary write it 819 * asynchronously so we can move on to the next block 820 * without delay. Otherwise do a delayed write because we 821 * may want to write somemore into the block later. 822 */ 823 if (ioflag & IO_SYNC) 824 bwrite(bp); 825 else if (n + croffset == pmp->pm_bpcluster) 826 bawrite(bp); 827 else 828 bdwrite(bp); 829 dep->de_flag |= DE_UPDATE; 830 } while (error == 0 && uio->uio_resid > 0); 831 832 /* 833 * If the write failed and they want us to, truncate the file back 834 * to the size it was before the write was attempted. 835 */ 836 errexit: 837 if (error) { 838 if (ioflag & IO_UNIT) { 839 detrunc(dep, osize, ioflag & IO_SYNC); 840 uio->uio_offset -= resid - uio->uio_resid; 841 uio->uio_resid = resid; 842 } else { 843 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC); 844 if (uio->uio_resid != resid) 845 error = 0; 846 } 847 } else if (ioflag & IO_SYNC) 848 error = deupdat(dep, 1); 849 return (error); 850 } 851 852 /* 853 * Flush the blocks of a file to disk. 854 * 855 * This function is worthless for vnodes that represent directories. Maybe we 856 * could just do a sync if they try an fsync on a directory file. 857 * 858 * msdosfs_fsync(struct vnode *a_vp, struct ucred *a_cred, int a_waitfor, 859 * struct thread *a_td) 860 */ 861 static int 862 msdosfs_fsync(struct vop_fsync_args *ap) 863 { 864 struct vnode *vp = ap->a_vp; 865 866 /* 867 * Flush all dirty buffers associated with a vnode. 868 */ 869 #ifdef DIAGNOSTIC 870 loop: 871 #endif 872 vfsync(vp, ap->a_waitfor, 0, NULL, NULL); 873 #ifdef DIAGNOSTIC 874 if (ap->a_waitfor == MNT_WAIT && !RB_EMPTY(&vp->v_rbdirty_tree)) { 875 vprint("msdosfs_fsync: dirty", vp); 876 goto loop; 877 } 878 #endif 879 return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT)); 880 } 881 882 /* 883 * msdosfs_remove(struct vnode *a_dvp, struct vnode *a_vp, 884 * struct componentname *a_cnp) 885 */ 886 static int 887 msdosfs_remove(struct vop_old_remove_args *ap) 888 { 889 struct denode *dep = VTODE(ap->a_vp); 890 struct denode *ddep = VTODE(ap->a_dvp); 891 int error; 892 893 if (ap->a_vp->v_type == VDIR) 894 error = EPERM; 895 else 896 error = removede(ddep, dep); 897 #ifdef MSDOSFS_DEBUG 898 kprintf("msdosfs_remove(), dep %p, v_sysrefs %d\n", 899 dep, ap->a_vp->v_sysref.refcnt); 900 #endif 901 return (error); 902 } 903 904 /* 905 * DOS filesystems don't know what links are. But since we already called 906 * msdosfs_lookup() with create and lockparent, the parent is locked so we 907 * have to free it before we return the error. 908 * 909 * msdosfs_link(struct vnode *a_tdvp, struct vnode *a_vp, 910 * struct componentname *a_cnp) 911 */ 912 static int 913 msdosfs_link(struct vop_old_link_args *ap) 914 { 915 return (EOPNOTSUPP); 916 } 917 918 /* 919 * Renames on files require moving the denode to a new hash queue since the 920 * denode's location is used to compute which hash queue to put the file 921 * in. Unless it is a rename in place. For example "mv a b". 922 * 923 * What follows is the basic algorithm: 924 * 925 * if (file move) { 926 * if (dest file exists) { 927 * remove dest file 928 * } 929 * if (dest and src in same directory) { 930 * rewrite name in existing directory slot 931 * } else { 932 * write new entry in dest directory 933 * update offset and dirclust in denode 934 * move denode to new hash chain 935 * clear old directory entry 936 * } 937 * } else { 938 * directory move 939 * if (dest directory exists) { 940 * if (dest is not empty) { 941 * return ENOTEMPTY 942 * } 943 * remove dest directory 944 * } 945 * if (dest and src in same directory) { 946 * rewrite name in existing entry 947 * } else { 948 * be sure dest is not a child of src directory 949 * write entry in dest directory 950 * update "." and ".." in moved directory 951 * clear old directory entry for moved directory 952 * } 953 * } 954 * 955 * On entry: 956 * source's parent directory is unlocked 957 * source file or directory is unlocked 958 * destination's parent directory is locked 959 * destination file or directory is locked if it exists 960 * 961 * On exit: 962 * all denodes should be released 963 * 964 * Notes: 965 * I'm not sure how the memory containing the pathnames pointed at by the 966 * componentname structures is freed, there may be some memory bleeding 967 * for each rename done. 968 * 969 * msdosfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, 970 * struct componentname *a_fcnp, struct vnode *a_tdvp, 971 * struct vnode *a_tvp, struct componentname *a_tcnp) 972 */ 973 static int 974 msdosfs_rename(struct vop_old_rename_args *ap) 975 { 976 struct vnode *tdvp = ap->a_tdvp; 977 struct vnode *fvp = ap->a_fvp; 978 struct vnode *fdvp = ap->a_fdvp; 979 struct vnode *tvp = ap->a_tvp; 980 struct componentname *tcnp = ap->a_tcnp; 981 struct componentname *fcnp = ap->a_fcnp; 982 struct denode *ip, *xp, *dp, *zp; 983 u_char toname[11], oldname[11]; 984 u_long from_diroffset, to_diroffset; 985 u_char to_count; 986 int doingdirectory = 0, newparent = 0; 987 int error; 988 u_long cn; 989 daddr_t bn; 990 struct denode *fddep; /* from file's parent directory */ 991 struct msdosfsmount *pmp; 992 struct direntry *dotdotp; 993 struct buf *bp; 994 995 fddep = VTODE(ap->a_fdvp); 996 pmp = fddep->de_pmp; 997 998 pmp = VFSTOMSDOSFS(fdvp->v_mount); 999 1000 /* 1001 * Check for cross-device rename. 1002 */ 1003 if ((fvp->v_mount != tdvp->v_mount) || 1004 (tvp && (fvp->v_mount != tvp->v_mount))) { 1005 error = EXDEV; 1006 abortit: 1007 if (tdvp == tvp) 1008 vrele(tdvp); 1009 else 1010 vput(tdvp); 1011 if (tvp) 1012 vput(tvp); 1013 vrele(fdvp); 1014 vrele(fvp); 1015 return (error); 1016 } 1017 1018 /* 1019 * If source and dest are the same, do nothing. 1020 */ 1021 if (tvp == fvp) { 1022 error = 0; 1023 goto abortit; 1024 } 1025 1026 /* 1027 * fvp, fdvp are unlocked, tvp, tdvp are locked. Lock fvp and note 1028 * that we have to unlock it to use the abortit target. 1029 */ 1030 error = vn_lock(fvp, LK_EXCLUSIVE); 1031 if (error) 1032 goto abortit; 1033 dp = VTODE(fdvp); 1034 ip = VTODE(fvp); 1035 1036 /* 1037 * Be sure we are not renaming ".", "..", or an alias of ".". This 1038 * leads to a crippled directory tree. It's pretty tough to do a 1039 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 1040 * doesn't work if the ".." entry is missing. 1041 */ 1042 if (ip->de_Attributes & ATTR_DIRECTORY) { 1043 /* 1044 * Avoid ".", "..", and aliases of "." for obvious reasons. 1045 */ 1046 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 1047 dp == ip || 1048 (fcnp->cn_flags & CNP_ISDOTDOT) || 1049 (tcnp->cn_flags & CNP_ISDOTDOT) || 1050 (ip->de_flag & DE_RENAME)) { 1051 vn_unlock(fvp); 1052 error = EINVAL; 1053 goto abortit; 1054 } 1055 ip->de_flag |= DE_RENAME; 1056 doingdirectory++; 1057 } 1058 1059 /* 1060 * fvp locked, fdvp unlocked, tvp, tdvp locked. DE_RENAME only 1061 * set if doingdirectory. We will get fvp unlocked in fairly 1062 * short order. dp and xp must be setup and fvp must be unlocked 1063 * for the out and bad targets to work properly. 1064 */ 1065 dp = VTODE(tdvp); 1066 xp = tvp ? VTODE(tvp) : NULL; 1067 1068 /* 1069 * Remember direntry place to use for destination 1070 */ 1071 to_diroffset = dp->de_fndoffset; 1072 to_count = dp->de_fndcnt; 1073 1074 /* 1075 * If ".." must be changed (ie the directory gets a new 1076 * parent) then the source directory must not be in the 1077 * directory heirarchy above the target, as this would 1078 * orphan everything below the source directory. Also 1079 * the user must have write permission in the source so 1080 * as to be able to change "..". We must repeat the call 1081 * to namei, as the parent directory is unlocked by the 1082 * call to doscheckpath(). 1083 */ 1084 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred); 1085 vn_unlock(fvp); 1086 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1087 newparent = 1; 1088 1089 /* 1090 * ok. fvp, fdvp unlocked, tvp, tdvp locked. tvp may be NULL. 1091 * DE_RENAME only set if doingdirectory. 1092 */ 1093 if (doingdirectory && newparent) { 1094 if (error) /* write access check above */ 1095 goto bad; 1096 if (xp != NULL) { 1097 vput(tvp); 1098 xp = NULL; 1099 } 1100 /* 1101 * checkpath vput's tdvp (VTOI(dp)) on return no matter what, 1102 * get an extra ref so we wind up with just an unlocked, ref'd 1103 * tdvp. The 'out' target skips tvp and tdvp cleanups (tdvp 1104 * isn't locked so we can't use the out target). 1105 */ 1106 vref(tdvp); 1107 error = doscheckpath(ip, dp); 1108 tcnp->cn_flags |= CNP_PDIRUNLOCK; 1109 if (error) { 1110 vrele(tdvp); 1111 goto out; 1112 } 1113 /* 1114 * relookup no longer messes with the ref count. tdvp must 1115 * be unlocked on entry and on success will be locked on 1116 * return. 1117 */ 1118 error = relookup(tdvp, &tvp, tcnp); 1119 if (error) { 1120 if (tcnp->cn_flags & CNP_PDIRUNLOCK) 1121 vrele(tdvp); 1122 else 1123 vput(tdvp); 1124 goto out; 1125 } 1126 1127 /* 1128 * tvp and tdvp are now locked again. 1129 */ 1130 dp = VTODE(tdvp); 1131 xp = tvp ? VTODE(tvp) : NULL; 1132 } 1133 1134 /* 1135 * tvp and tdvp are now locked again, the 'bad' target can be used 1136 * to clean them up again. Delete an existant target and clean 1137 * up tvp. Set xp to NULL to indicate that tvp has been cleaned up. 1138 */ 1139 if (xp != NULL) { 1140 /* 1141 * Target must be empty if a directory and have no links 1142 * to it. Also, ensure source and target are compatible 1143 * (both directories, or both not directories). 1144 */ 1145 if (xp->de_Attributes & ATTR_DIRECTORY) { 1146 if (!dosdirempty(xp)) { 1147 error = ENOTEMPTY; 1148 goto bad; 1149 } 1150 if (!doingdirectory) { 1151 error = ENOTDIR; 1152 goto bad; 1153 } 1154 } else if (doingdirectory) { 1155 error = EISDIR; 1156 goto bad; 1157 } 1158 error = removede(dp, xp); 1159 if (error) 1160 goto bad; 1161 vput(tvp); 1162 xp = NULL; 1163 tvp = NULL; 1164 } 1165 1166 /* 1167 * Convert the filename in tcnp into a dos filename. We copy this 1168 * into the denode and directory entry for the destination 1169 * file/directory. 1170 */ 1171 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1172 if (error) 1173 goto bad; 1174 1175 /* 1176 * Since from wasn't locked at various places above, we have to do 1177 * a relookup here. If the target and source are the same directory 1178 * we have to unlock the target directory in order to safely relookup 1179 * the source, because relookup expects its directory to be unlocked. 1180 * 1181 * Note that ap->a_fvp is still valid and ref'd. Any cleanup must 1182 * now take that into account. 1183 * 1184 * The tdvp locking issues make this a real mess. 1185 */ 1186 fcnp->cn_flags &= ~CNP_MODMASK; 1187 fcnp->cn_flags |= CNP_LOCKPARENT; 1188 if (newparent == 0) 1189 vn_unlock(tdvp); 1190 error = relookup(fdvp, &fvp, fcnp); 1191 if (error || fvp == NULL) { 1192 /* 1193 * From name has disappeared. Note: fdvp might == tdvp. 1194 * 1195 * DE_RENAME is only set if doingdirectory. 1196 */ 1197 if (doingdirectory) 1198 panic("rename: lost dir entry"); 1199 if (fcnp->cn_flags & CNP_PDIRUNLOCK) 1200 vrele(fdvp); 1201 else 1202 vput(fdvp); 1203 if (newparent == 0) 1204 vrele(tdvp); 1205 else 1206 vput(tdvp); 1207 vrele(ap->a_fvp); 1208 return(0); 1209 } 1210 1211 /* 1212 * No error occured. tdvp, fdvp and fvp are all locked. If 1213 * newparent was 0 be aware that fdvp == tdvp. tvp has been cleaned 1214 * up. ap->a_fvp is still refd. 1215 */ 1216 xp = VTODE(fvp); 1217 zp = VTODE(fdvp); 1218 from_diroffset = zp->de_fndoffset; 1219 1220 /* 1221 * Ensure that the directory entry still exists and has not 1222 * changed till now. If the source is a file the entry may 1223 * have been unlinked or renamed. In either case there is 1224 * no further work to be done. If the source is a directory 1225 * then it cannot have been rmdir'ed or renamed; this is 1226 * prohibited by the DE_RENAME flag. 1227 * 1228 * DE_RENAME is only set if doingdirectory. 1229 */ 1230 if (xp != ip) { 1231 if (doingdirectory) 1232 panic("rename: lost dir entry"); 1233 goto done; 1234 } else { 1235 u_long new_dirclust; 1236 u_long new_diroffset; 1237 1238 /* 1239 * First write a new entry in the destination 1240 * directory and mark the entry in the source directory 1241 * as deleted. Then move the denode to the correct hash 1242 * chain for its new location in the filesystem. And, if 1243 * we moved a directory, then update its .. entry to point 1244 * to the new parent directory. 1245 */ 1246 bcopy(ip->de_Name, oldname, 11); 1247 bcopy(toname, ip->de_Name, 11); /* update denode */ 1248 dp->de_fndoffset = to_diroffset; 1249 dp->de_fndcnt = to_count; 1250 error = createde(ip, dp, (struct denode **)0, tcnp); 1251 if (error) { 1252 bcopy(oldname, ip->de_Name, 11); 1253 goto done; 1254 } 1255 ip->de_refcnt++; 1256 zp->de_fndoffset = from_diroffset; 1257 error = removede(zp, ip); 1258 if (error) { 1259 /* XXX should really panic here, fs is corrupt */ 1260 goto done; 1261 } 1262 if (!doingdirectory) { 1263 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 1264 NULL, &new_dirclust, NULL); 1265 if (error) { 1266 /* XXX should really panic here, fs is corrupt */ 1267 goto done; 1268 } 1269 if (new_dirclust == MSDOSFSROOT) 1270 new_diroffset = to_diroffset; 1271 else 1272 new_diroffset = to_diroffset & pmp->pm_crbomask; 1273 msdosfs_reinsert(ip, new_dirclust, new_diroffset); 1274 } 1275 } 1276 1277 /* 1278 * If we moved a directory to a new parent directory, then we must 1279 * fixup the ".." entry in the moved directory. 1280 */ 1281 if (doingdirectory && newparent) { 1282 cn = ip->de_StartCluster; 1283 if (cn == MSDOSFSROOT) { 1284 /* this should never happen */ 1285 panic("msdosfs_rename(): updating .. in root directory?"); 1286 } else { 1287 bn = xcntobn(pmp, cn); 1288 } 1289 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), pmp->pm_bpcluster, &bp); 1290 if (error) { 1291 /* XXX should really panic here, fs is corrupt */ 1292 brelse(bp); 1293 goto done; 1294 } 1295 dotdotp = (struct direntry *)bp->b_data + 1; 1296 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1297 if (FAT32(pmp)) 1298 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1299 error = bwrite(bp); 1300 if (error) { 1301 /* XXX should really panic here, fs is corrupt */ 1302 goto done; 1303 } 1304 } 1305 1306 /* 1307 * done case fvp, fdvp, tdvp are locked. ap->a_fvp is refd 1308 */ 1309 done: 1310 if (doingdirectory) 1311 ip->de_flag &= ~DE_RENAME; /* XXX fvp not locked */ 1312 vput(fvp); 1313 if (newparent) 1314 vput(fdvp); 1315 else 1316 vrele(fdvp); 1317 vput(tdvp); 1318 vrele(ap->a_fvp); 1319 return (error); 1320 1321 /* 1322 * 'bad' target: xp governs tvp. tvp and tdvp arel ocked, fdvp and fvp 1323 * are not locked. ip points to fvp's inode which may have DE_RENAME 1324 * set. 1325 */ 1326 bad: 1327 if (xp) 1328 vput(tvp); 1329 vput(tdvp); 1330 out: 1331 /* 1332 * 'out' target: tvp and tdvp have already been cleaned up. 1333 */ 1334 if (doingdirectory) 1335 ip->de_flag &= ~DE_RENAME; 1336 vrele(fdvp); 1337 vrele(fvp); 1338 return (error); 1339 1340 } 1341 1342 static struct { 1343 struct direntry dot; 1344 struct direntry dotdot; 1345 } dosdirtemplate = { 1346 { ". ", " ", /* the . entry */ 1347 ATTR_DIRECTORY, /* file attribute */ 1348 0, /* reserved */ 1349 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1350 { 0, 0 }, /* access date */ 1351 { 0, 0 }, /* high bits of start cluster */ 1352 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1353 { 0, 0 }, /* startcluster */ 1354 { 0, 0, 0, 0 } /* filesize */ 1355 }, 1356 { ".. ", " ", /* the .. entry */ 1357 ATTR_DIRECTORY, /* file attribute */ 1358 0, /* reserved */ 1359 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1360 { 0, 0 }, /* access date */ 1361 { 0, 0 }, /* high bits of start cluster */ 1362 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1363 { 0, 0 }, /* startcluster */ 1364 { 0, 0, 0, 0 } /* filesize */ 1365 } 1366 }; 1367 1368 /* 1369 * msdosfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, 1370 * struct componentname *a_cnp, struct vattr *a_vap) 1371 */ 1372 static int 1373 msdosfs_mkdir(struct vop_old_mkdir_args *ap) 1374 { 1375 struct componentname *cnp = ap->a_cnp; 1376 struct denode *dep; 1377 struct denode *pdep = VTODE(ap->a_dvp); 1378 struct direntry *denp; 1379 struct msdosfsmount *pmp = pdep->de_pmp; 1380 struct buf *bp; 1381 u_long newcluster, pcl; 1382 int bn; 1383 int error; 1384 struct denode ndirent; 1385 struct timespec ts; 1386 1387 /* 1388 * If this is the root directory and there is no space left we 1389 * can't do anything. This is because the root directory can not 1390 * change size. 1391 */ 1392 if (pdep->de_StartCluster == MSDOSFSROOT 1393 && pdep->de_fndoffset >= pdep->de_FileSize) { 1394 error = ENOSPC; 1395 goto bad2; 1396 } 1397 1398 /* 1399 * Allocate a cluster to hold the about to be created directory. 1400 */ 1401 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1402 if (error) 1403 goto bad2; 1404 1405 bzero(&ndirent, sizeof(ndirent)); 1406 ndirent.de_pmp = pmp; 1407 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1408 getnanotime(&ts); 1409 DETIMES(&ndirent, &ts, &ts, &ts); 1410 1411 /* 1412 * Now fill the cluster with the "." and ".." entries. And write 1413 * the cluster to disk. This way it is there for the parent 1414 * directory to be pointing at if there were a crash. 1415 */ 1416 bn = xcntobn(pmp, newcluster); 1417 /* always succeeds */ 1418 bp = getblk(pmp->pm_devvp, de_bntodoff(pmp, bn), 1419 pmp->pm_bpcluster, 0, 0); 1420 bzero(bp->b_data, pmp->pm_bpcluster); 1421 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1422 denp = (struct direntry *)bp->b_data; 1423 putushort(denp[0].deStartCluster, newcluster); 1424 putushort(denp[0].deCDate, ndirent.de_CDate); 1425 putushort(denp[0].deCTime, ndirent.de_CTime); 1426 denp[0].deCHundredth = ndirent.de_CHun; 1427 putushort(denp[0].deADate, ndirent.de_ADate); 1428 putushort(denp[0].deMDate, ndirent.de_MDate); 1429 putushort(denp[0].deMTime, ndirent.de_MTime); 1430 pcl = pdep->de_StartCluster; 1431 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1432 pcl = 0; 1433 putushort(denp[1].deStartCluster, pcl); 1434 putushort(denp[1].deCDate, ndirent.de_CDate); 1435 putushort(denp[1].deCTime, ndirent.de_CTime); 1436 denp[1].deCHundredth = ndirent.de_CHun; 1437 putushort(denp[1].deADate, ndirent.de_ADate); 1438 putushort(denp[1].deMDate, ndirent.de_MDate); 1439 putushort(denp[1].deMTime, ndirent.de_MTime); 1440 if (FAT32(pmp)) { 1441 putushort(denp[0].deHighClust, newcluster >> 16); 1442 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1443 } 1444 1445 error = bwrite(bp); 1446 if (error) 1447 goto bad; 1448 1449 /* 1450 * Now build up a directory entry pointing to the newly allocated 1451 * cluster. This will be written to an empty slot in the parent 1452 * directory. 1453 */ 1454 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1455 if (error) 1456 goto bad; 1457 1458 ndirent.de_Attributes = ATTR_DIRECTORY; 1459 ndirent.de_LowerCase = 0; 1460 ndirent.de_StartCluster = newcluster; 1461 ndirent.de_FileSize = 0; 1462 ndirent.de_dev = pdep->de_dev; 1463 ndirent.de_devvp = pdep->de_devvp; 1464 error = createde(&ndirent, pdep, &dep, cnp); 1465 if (error) 1466 goto bad; 1467 *ap->a_vpp = DETOV(dep); 1468 return (0); 1469 1470 bad: 1471 clusterfree(pmp, newcluster, NULL); 1472 bad2: 1473 return (error); 1474 } 1475 1476 /* 1477 * msdosfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, 1478 * struct componentname *a_cnp) 1479 */ 1480 static int 1481 msdosfs_rmdir(struct vop_old_rmdir_args *ap) 1482 { 1483 struct vnode *vp = ap->a_vp; 1484 struct vnode *dvp = ap->a_dvp; 1485 struct denode *ip, *dp; 1486 int error; 1487 1488 ip = VTODE(vp); 1489 dp = VTODE(dvp); 1490 1491 /* 1492 * Verify the directory is empty (and valid). 1493 * (Rmdir ".." won't be valid since 1494 * ".." will contain a reference to 1495 * the current directory and thus be 1496 * non-empty.) 1497 */ 1498 error = 0; 1499 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1500 error = ENOTEMPTY; 1501 goto out; 1502 } 1503 /* 1504 * Delete the entry from the directory. For dos filesystems this 1505 * gets rid of the directory entry on disk, the in memory copy 1506 * still exists but the de_refcnt is <= 0. This prevents it from 1507 * being found by deget(). When the vput() on dep is done we give 1508 * up access and eventually msdosfs_reclaim() will be called which 1509 * will remove it from the denode cache. 1510 */ 1511 error = removede(dp, ip); 1512 if (error) 1513 goto out; 1514 /* 1515 * This is where we decrement the link count in the parent 1516 * directory. Since dos filesystems don't do this we just purge 1517 * the name cache. 1518 */ 1519 vn_unlock(dvp); 1520 /* 1521 * Truncate the directory that is being deleted. 1522 */ 1523 error = detrunc(ip, (u_long)0, IO_SYNC); 1524 1525 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 1526 out: 1527 return (error); 1528 } 1529 1530 /* 1531 * DOS filesystems don't know what symlinks are. 1532 * 1533 * msdosfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, 1534 * struct componentname *a_cnp, struct vattr *a_vap, 1535 * char *a_target) 1536 */ 1537 static int 1538 msdosfs_symlink(struct vop_old_symlink_args *ap) 1539 { 1540 return (EOPNOTSUPP); 1541 } 1542 1543 /* 1544 * msdosfs_readdir(struct vnode *a_vp, struct uio *a_uio, 1545 * struct ucred *a_cred, int *a_eofflag, int *a_ncookies, 1546 * u_long **a_cookies) 1547 */ 1548 static int 1549 msdosfs_readdir(struct vop_readdir_args *ap) 1550 { 1551 int error = 0; 1552 int diff; 1553 long n; 1554 int blsize; 1555 long on; 1556 u_long cn; 1557 u_long dirsperblk; 1558 long bias = 0; 1559 daddr_t bn, lbn; 1560 struct buf *bp; 1561 struct denode *dep; 1562 struct msdosfsmount *pmp; 1563 struct direntry *dentp; 1564 struct uio *uio = ap->a_uio; 1565 u_long *cookies = NULL; 1566 int ncookies = 0; 1567 off_t offset, off; 1568 int chksum = -1; 1569 ino_t d_ino; 1570 uint16_t d_namlen; 1571 uint8_t d_type; 1572 char *d_name_storage = NULL; 1573 char *d_name; 1574 1575 if ((error = vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY)) != 0) 1576 return (error); 1577 1578 dep = VTODE(ap->a_vp); 1579 pmp = dep->de_pmp; 1580 1581 #ifdef MSDOSFS_DEBUG 1582 kprintf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1583 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1584 #endif 1585 1586 /* 1587 * msdosfs_readdir() won't operate properly on regular files since 1588 * it does i/o only with the the filesystem vnode, and hence can 1589 * retrieve the wrong block from the buffer cache for a plain file. 1590 * So, fail attempts to readdir() on a plain file. 1591 */ 1592 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) { 1593 error = ENOTDIR; 1594 goto done; 1595 } 1596 1597 /* 1598 * If the user buffer is smaller than the size of one dos directory 1599 * entry or the file offset is not a multiple of the size of a 1600 * directory entry, then we fail the read. 1601 */ 1602 off = offset = uio->uio_offset; 1603 if (uio->uio_resid < sizeof(struct direntry) || 1604 (offset & (sizeof(struct direntry) - 1))) { 1605 error = EINVAL; 1606 goto done; 1607 } 1608 1609 if (ap->a_ncookies) { 1610 ncookies = uio->uio_resid / 16 + 1; 1611 if (ncookies > 1024) 1612 ncookies = 1024; 1613 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1614 M_WAITOK); 1615 *ap->a_cookies = cookies; 1616 *ap->a_ncookies = ncookies; 1617 } 1618 1619 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1620 1621 /* 1622 * If they are reading from the root directory then, we simulate 1623 * the . and .. entries since these don't exist in the root 1624 * directory. We also set the offset bias to make up for having to 1625 * simulate these entries. By this I mean that at file offset 64 we 1626 * read the first entry in the root directory that lives on disk. 1627 */ 1628 if (dep->de_StartCluster == MSDOSFSROOT 1629 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1630 #if 0 1631 kprintf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1632 offset); 1633 #endif 1634 bias = 2 * sizeof(struct direntry); 1635 if (offset < bias) { 1636 for (n = (int)offset / sizeof(struct direntry); n < 2; 1637 n++) { 1638 if (FAT32(pmp)) 1639 d_ino = xcntobn(pmp, pmp->pm_rootdirblk) 1640 * dirsperblk; 1641 else 1642 d_ino = 1; 1643 d_type = DT_DIR; 1644 if (n == 0) { 1645 d_namlen = 1; 1646 d_name = "."; 1647 } else /* if (n == 1) */{ 1648 d_namlen = 2; 1649 d_name = ".."; 1650 } 1651 if (vop_write_dirent(&error, uio, d_ino, d_type, 1652 d_namlen, d_name)) 1653 goto out; 1654 if (error) 1655 goto out; 1656 offset += sizeof(struct direntry); 1657 off = offset; 1658 if (cookies) { 1659 *cookies++ = offset; 1660 if (--ncookies <= 0) 1661 goto out; 1662 } 1663 } 1664 } 1665 } 1666 1667 d_name_storage = kmalloc(WIN_MAXLEN, M_TEMP, M_WAITOK); 1668 off = offset; 1669 1670 while (uio->uio_resid > 0) { 1671 lbn = de_off2cn(pmp, offset - bias); 1672 on = (offset - bias) & pmp->pm_crbomask; 1673 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1674 diff = dep->de_FileSize - (offset - bias); 1675 if (diff <= 0) 1676 break; 1677 n = min(n, diff); 1678 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1679 if (error) 1680 break; 1681 error = bread(pmp->pm_devvp, de_bntodoff(pmp, bn), blsize, &bp); 1682 if (error) { 1683 brelse(bp); 1684 kfree(d_name_storage, M_TEMP); 1685 goto done; 1686 } 1687 n = min(n, blsize - bp->b_resid); 1688 1689 /* 1690 * Convert from dos directory entries to fs-independent 1691 * directory entries. 1692 */ 1693 for (dentp = (struct direntry *)(bp->b_data + on); 1694 (char *)dentp < bp->b_data + on + n; 1695 dentp++, offset += sizeof(struct direntry)) { 1696 #if 0 1697 kprintf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1698 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1699 #endif 1700 d_name = d_name_storage; 1701 /* 1702 * If this is an unused entry, we can stop. 1703 */ 1704 if (dentp->deName[0] == SLOT_EMPTY) { 1705 brelse(bp); 1706 goto out; 1707 } 1708 /* 1709 * Skip deleted entries. 1710 */ 1711 if (dentp->deName[0] == SLOT_DELETED) { 1712 chksum = -1; 1713 continue; 1714 } 1715 1716 /* 1717 * Handle Win95 long directory entries 1718 */ 1719 if (dentp->deAttributes == ATTR_WIN95) { 1720 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1721 continue; 1722 chksum = win2unixfn((struct winentry *)dentp, 1723 d_name, &d_namlen, chksum, 1724 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1725 pmp->pm_u2w); 1726 continue; 1727 } 1728 1729 /* 1730 * Skip volume labels 1731 */ 1732 if (dentp->deAttributes & ATTR_VOLUME) { 1733 chksum = -1; 1734 continue; 1735 } 1736 /* 1737 * This computation of d_ino must match 1738 * the computation of va_fileid in 1739 * msdosfs_getattr. 1740 */ 1741 if (dentp->deAttributes & ATTR_DIRECTORY) { 1742 d_ino = getushort(dentp->deStartCluster); 1743 if (FAT32(pmp)) 1744 d_ino |= getushort(dentp->deHighClust) << 16; 1745 /* if this is the root directory */ 1746 if (d_ino != MSDOSFSROOT) 1747 d_ino = xcntobn(pmp, d_ino) * dirsperblk; 1748 else if (FAT32(pmp)) 1749 d_ino = xcntobn(pmp, pmp->pm_rootdirblk) 1750 * dirsperblk; 1751 else 1752 d_ino = 1; 1753 d_type = DT_DIR; 1754 } else { 1755 d_ino = offset / sizeof(struct direntry); 1756 d_type = DT_REG; 1757 } 1758 if (chksum != winChksum(dentp->deName)) { 1759 d_namlen = dos2unixfn(dentp->deName, 1760 (u_char *)d_name, 1761 dentp->deLowerCase | 1762 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1763 (LCASE_BASE | LCASE_EXT) : 0), 1764 pmp->pm_flags & MSDOSFSMNT_U2WTABLE, 1765 pmp->pm_d2u, 1766 pmp->pm_flags & MSDOSFSMNT_ULTABLE, 1767 pmp->pm_ul); 1768 } 1769 chksum = -1; 1770 if (vop_write_dirent(&error, uio, d_ino, d_type, 1771 d_namlen, d_name)) { 1772 brelse(bp); 1773 goto out; 1774 } 1775 if (error) { 1776 brelse(bp); 1777 goto out; 1778 } 1779 1780 if (cookies) { 1781 *cookies++ = offset + sizeof(struct direntry); 1782 if (--ncookies <= 0) { 1783 brelse(bp); 1784 goto out; 1785 } 1786 } 1787 off = offset + sizeof(struct direntry); 1788 } 1789 brelse(bp); 1790 } 1791 out: 1792 if (d_name_storage != NULL) 1793 kfree(d_name_storage, M_TEMP); 1794 1795 /* Subtract unused cookies */ 1796 if (ap->a_ncookies) 1797 *ap->a_ncookies -= ncookies; 1798 1799 uio->uio_offset = off; 1800 1801 /* 1802 * Set the eofflag (NFS uses it) 1803 */ 1804 if (ap->a_eofflag) { 1805 if (dep->de_FileSize - (offset - bias) <= 0) 1806 *ap->a_eofflag = 1; 1807 else 1808 *ap->a_eofflag = 0; 1809 } 1810 done: 1811 vn_unlock(ap->a_vp); 1812 return (error); 1813 } 1814 1815 /* 1816 * vp - address of vnode file the file 1817 * bn - which cluster we are interested in mapping to a filesystem block number. 1818 * vpp - returns the vnode for the block special file holding the filesystem 1819 * containing the file of interest 1820 * bnp - address of where to return the filesystem relative block number 1821 * 1822 * msdosfs_bmap(struct vnode *a_vp, off_t a_loffset, struct vnode **a_vpp, 1823 * off_t *a_doffsetp, int *a_runp, int *a_runb) 1824 */ 1825 static int 1826 msdosfs_bmap(struct vop_bmap_args *ap) 1827 { 1828 struct denode *dep = VTODE(ap->a_vp); 1829 struct msdosfsmount *pmp = dep->de_pmp; 1830 daddr_t lbn; 1831 daddr_t dbn; 1832 int error; 1833 1834 if (ap->a_vpp != NULL) 1835 *ap->a_vpp = dep->de_devvp; 1836 if (ap->a_doffsetp == NULL) 1837 return (0); 1838 if (ap->a_runp) { 1839 /* 1840 * Sequential clusters should be counted here. 1841 */ 1842 *ap->a_runp = 0; 1843 } 1844 if (ap->a_runb) { 1845 *ap->a_runb = 0; 1846 } 1847 KKASSERT(((int)ap->a_loffset & ((1 << pmp->pm_cnshift) - 1)) == 0); 1848 lbn = de_off2cn(pmp, ap->a_loffset); 1849 error = pcbmap(dep, lbn, &dbn, NULL, NULL); 1850 if (error || dbn == (daddr_t)-1) { 1851 *ap->a_doffsetp = NOOFFSET; 1852 } else { 1853 *ap->a_doffsetp = de_bntodoff(pmp, dbn); 1854 } 1855 return (error); 1856 } 1857 1858 /* 1859 * msdosfs_strategy(struct vnode *a_vp, struct bio *a_bio) 1860 */ 1861 static int 1862 msdosfs_strategy(struct vop_strategy_args *ap) 1863 { 1864 struct bio *bio = ap->a_bio; 1865 struct bio *nbio; 1866 struct buf *bp = bio->bio_buf; 1867 struct vnode *vp = ap->a_vp; 1868 struct denode *dep = VTODE(vp); 1869 struct msdosfsmount *pmp = dep->de_pmp; 1870 int error = 0; 1871 daddr_t dblkno; 1872 1873 if (vp->v_type == VBLK || vp->v_type == VCHR) 1874 panic("msdosfs_strategy: spec"); 1875 /* 1876 * If we don't already know the filesystem relative block number 1877 * then get it using pcbmap(). If pcbmap() returns the block 1878 * number as -1 then we've got a hole in the file. DOS filesystems 1879 * don't allow files with holes, so we shouldn't ever see this. 1880 */ 1881 nbio = push_bio(bio); 1882 if (nbio->bio_offset == NOOFFSET) { 1883 error = pcbmap(dep, de_off2cn(pmp, bio->bio_offset), 1884 &dblkno, NULL, NULL); 1885 if (error) { 1886 bp->b_error = error; 1887 bp->b_flags |= B_ERROR; 1888 /* I/O was never started on nbio, must biodone(bio) */ 1889 biodone(bio); 1890 return (error); 1891 } 1892 if (dblkno == (daddr_t)-1) { 1893 nbio->bio_offset = NOOFFSET; 1894 vfs_bio_clrbuf(bp); 1895 } else { 1896 nbio->bio_offset = de_bntodoff(pmp, dblkno); 1897 } 1898 } 1899 if (nbio->bio_offset == NOOFFSET) { 1900 /* I/O was never started on nbio, must biodone(bio) */ 1901 biodone(bio); 1902 return (0); 1903 } 1904 /* 1905 * Read/write the block from/to the disk that contains the desired 1906 * file block. 1907 */ 1908 vn_strategy(dep->de_devvp, nbio); 1909 return (0); 1910 } 1911 1912 /* 1913 * msdosfs_print(struct vnode *vp) 1914 */ 1915 static int 1916 msdosfs_print(struct vop_print_args *ap) 1917 { 1918 struct denode *dep = VTODE(ap->a_vp); 1919 1920 kprintf( 1921 "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ", 1922 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1923 kprintf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev)); 1924 lockmgr_printinfo(&ap->a_vp->v_lock); 1925 kprintf("\n"); 1926 return (0); 1927 } 1928 1929 /* 1930 * msdosfs_pathconf(struct vnode *a_vp, int a_name, int *a_retval) 1931 */ 1932 static int 1933 msdosfs_pathconf(struct vop_pathconf_args *ap) 1934 { 1935 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1936 1937 switch (ap->a_name) { 1938 case _PC_LINK_MAX: 1939 *ap->a_retval = 1; 1940 return (0); 1941 case _PC_NAME_MAX: 1942 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1943 return (0); 1944 case _PC_PATH_MAX: 1945 *ap->a_retval = PATH_MAX; 1946 return (0); 1947 case _PC_CHOWN_RESTRICTED: 1948 *ap->a_retval = 1; 1949 return (0); 1950 case _PC_NO_TRUNC: 1951 *ap->a_retval = 0; 1952 return (0); 1953 default: 1954 return (EINVAL); 1955 } 1956 /* NOTREACHED */ 1957 } 1958 1959 /* 1960 * get page routine 1961 * 1962 * XXX By default, wimp out... note that a_offset is ignored (and always 1963 * XXX has been). 1964 */ 1965 int 1966 msdosfs_getpages(struct vop_getpages_args *ap) 1967 { 1968 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 1969 ap->a_reqpage); 1970 } 1971 1972 /* 1973 * put page routine 1974 * 1975 * XXX By default, wimp out... note that a_offset is ignored (and always 1976 * XXX has been). 1977 */ 1978 int 1979 msdosfs_putpages(struct vop_putpages_args *ap) 1980 { 1981 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 1982 ap->a_sync, ap->a_rtvals); 1983 } 1984 1985 /* Global vfs data structures for msdosfs */ 1986 struct vop_ops msdosfs_vnode_vops = { 1987 .vop_default = vop_defaultop, 1988 .vop_access = msdosfs_access, 1989 .vop_bmap = msdosfs_bmap, 1990 .vop_old_lookup = msdosfs_lookup, 1991 .vop_open = msdosfs_open, 1992 .vop_close = msdosfs_close, 1993 .vop_old_create = msdosfs_create, 1994 .vop_fsync = msdosfs_fsync, 1995 .vop_getattr = msdosfs_getattr, 1996 .vop_inactive = msdosfs_inactive, 1997 .vop_old_link = msdosfs_link, 1998 .vop_old_mkdir = msdosfs_mkdir, 1999 .vop_old_mknod = msdosfs_mknod, 2000 .vop_pathconf = msdosfs_pathconf, 2001 .vop_print = msdosfs_print, 2002 .vop_read = msdosfs_read, 2003 .vop_readdir = msdosfs_readdir, 2004 .vop_reclaim = msdosfs_reclaim, 2005 .vop_old_remove = msdosfs_remove, 2006 .vop_old_rename = msdosfs_rename, 2007 .vop_old_rmdir = msdosfs_rmdir, 2008 .vop_setattr = msdosfs_setattr, 2009 .vop_strategy = msdosfs_strategy, 2010 .vop_old_symlink = msdosfs_symlink, 2011 .vop_write = msdosfs_write, 2012 .vop_getpages = msdosfs_getpages, 2013 .vop_putpages = msdosfs_putpages 2014 }; 2015