Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/fs/msdosfs/msdosfs_vnops.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* $FreeBSD$ */ 2 /* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */ 3 4 /*- 5 * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 6 * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 7 * All rights reserved. 8 * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by TooLs GmbH. 21 * 4. The name of TooLs GmbH may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 30 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /*- 36 * Written by Paul Popelka (paulp@uts.amdahl.com) 37 * 38 * You can do anything you want with this software, just don't say you wrote 39 * it, and don't remove this notice. 40 * 41 * This software is provided "as is". 42 * 43 * The author supplies this software to be publicly redistributed on the 44 * understanding that the author is not responsible for the correct 45 * functioning of this software in any circumstances and is not liable for 46 * any damages caused by this software. 47 * 48 * October 1992 49 */ 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/lockf.h> 54 #include <sys/namei.h> 55 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */ 56 #include <sys/kernel.h> 57 #include <sys/stat.h> 58 #include <sys/bio.h> 59 #include <sys/buf.h> 60 #include <sys/proc.h> 61 #include <sys/mount.h> 62 #include <sys/unistd.h> 63 #include <sys/vnode.h> 64 #include <sys/malloc.h> 65 #include <sys/dirent.h> 66 #include <sys/signalvar.h> 67 68 #include <vm/vm.h> 69 #include <vm/vm_extern.h> 70 #include <vm/vnode_pager.h> 71 72 #include <machine/mutex.h> 73 74 #include <fs/msdosfs/bpb.h> 75 #include <fs/msdosfs/msdosfsmount.h> 76 #include <fs/msdosfs/direntry.h> 77 #include <fs/msdosfs/denode.h> 78 #include <fs/msdosfs/fat.h> 79 80 #include "opt_msdosfs.h" 81 82 #define DOS_FILESIZE_MAX 0xffffffff 83 84 /* 85 * Prototypes for MSDOSFS vnode operations 86 */ 87 static int msdosfs_advlock(struct vop_advlock_args *); 88 static int msdosfs_create(struct vop_create_args *); 89 static int msdosfs_mknod(struct vop_mknod_args *); 90 static int msdosfs_close(struct vop_close_args *); 91 static int msdosfs_access(struct vop_access_args *); 92 static int msdosfs_getattr(struct vop_getattr_args *); 93 static int msdosfs_setattr(struct vop_setattr_args *); 94 static int msdosfs_read(struct vop_read_args *); 95 static int msdosfs_write(struct vop_write_args *); 96 static int msdosfs_fsync(struct vop_fsync_args *); 97 static int msdosfs_remove(struct vop_remove_args *); 98 static int msdosfs_link(struct vop_link_args *); 99 static int msdosfs_rename(struct vop_rename_args *); 100 static int msdosfs_mkdir(struct vop_mkdir_args *); 101 static int msdosfs_rmdir(struct vop_rmdir_args *); 102 static int msdosfs_symlink(struct vop_symlink_args *); 103 static int msdosfs_readdir(struct vop_readdir_args *); 104 static int msdosfs_bmap(struct vop_bmap_args *); 105 static int msdosfs_strategy(struct vop_strategy_args *); 106 static int msdosfs_print(struct vop_print_args *); 107 static int msdosfs_pathconf(struct vop_pathconf_args *ap); 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. We must also free 130 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or 131 * only if the SAVESTART bit in cn_flags is clear on success. 132 */ 133 static int 134 msdosfs_create(ap) 135 struct vop_create_args /* { 136 struct vnode *a_dvp; 137 struct vnode **a_vpp; 138 struct componentname *a_cnp; 139 struct vattr *a_vap; 140 } */ *ap; 141 { 142 struct componentname *cnp = ap->a_cnp; 143 struct denode ndirent; 144 struct denode *dep; 145 struct denode *pdep = VTODE(ap->a_dvp); 146 struct timespec ts; 147 int error; 148 149 #ifdef MSDOSFS_DEBUG 150 printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap); 151 #endif 152 153 /* 154 * If this is the root directory and there is no space left we 155 * can't do anything. This is because the root directory can not 156 * change size. 157 */ 158 if (pdep->de_StartCluster == MSDOSFSROOT 159 && pdep->de_fndoffset >= pdep->de_FileSize) { 160 error = ENOSPC; 161 goto bad; 162 } 163 164 /* 165 * Create a directory entry for the file, then call createde() to 166 * have it installed. NOTE: DOS files are always executable. We 167 * use the absence of the owner write bit to make the file 168 * readonly. 169 */ 170 #ifdef DIAGNOSTIC 171 if ((cnp->cn_flags & HASBUF) == 0) 172 panic("msdosfs_create: no name"); 173 #endif 174 bzero(&ndirent, sizeof(ndirent)); 175 error = uniqdosname(pdep, cnp, ndirent.de_Name); 176 if (error) 177 goto bad; 178 179 ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ? 180 ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY; 181 ndirent.de_LowerCase = 0; 182 ndirent.de_StartCluster = 0; 183 ndirent.de_FileSize = 0; 184 ndirent.de_dev = pdep->de_dev; 185 ndirent.de_devvp = pdep->de_devvp; 186 ndirent.de_pmp = pdep->de_pmp; 187 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 188 getnanotime(&ts); 189 DETIMES(&ndirent, &ts, &ts, &ts); 190 error = createde(&ndirent, pdep, &dep, cnp); 191 if (error) 192 goto bad; 193 *ap->a_vpp = DETOV(dep); 194 return (0); 195 196 bad: 197 return (error); 198 } 199 200 static int 201 msdosfs_mknod(ap) 202 struct vop_mknod_args /* { 203 struct vnode *a_dvp; 204 struct vnode **a_vpp; 205 struct componentname *a_cnp; 206 struct vattr *a_vap; 207 } */ *ap; 208 { 209 return (EINVAL); 210 } 211 212 static int 213 msdosfs_close(ap) 214 struct vop_close_args /* { 215 struct vnode *a_vp; 216 int a_fflag; 217 struct ucred *a_cred; 218 struct thread *a_td; 219 } */ *ap; 220 { 221 struct vnode *vp = ap->a_vp; 222 struct denode *dep = VTODE(vp); 223 struct timespec ts; 224 225 VI_LOCK(vp); 226 if (vp->v_usecount > 1) { 227 getnanotime(&ts); 228 DETIMES(dep, &ts, &ts, &ts); 229 } 230 VI_UNLOCK(vp); 231 return 0; 232 } 233 234 static int 235 msdosfs_access(ap) 236 struct vop_access_args /* { 237 struct vnode *a_vp; 238 int a_mode; 239 struct ucred *a_cred; 240 struct thread *a_td; 241 } */ *ap; 242 { 243 struct vnode *vp = ap->a_vp; 244 struct denode *dep = VTODE(ap->a_vp); 245 struct msdosfsmount *pmp = dep->de_pmp; 246 mode_t file_mode, mode = ap->a_mode; 247 248 file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) | 249 ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH)); 250 file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 251 252 /* 253 * Disallow write attempts on read-only filesystems; 254 * unless the file is a socket, fifo, or a block or 255 * character device resident on the filesystem. 256 */ 257 if (mode & VWRITE) { 258 switch (vp->v_type) { 259 case VDIR: 260 case VLNK: 261 case VREG: 262 if (vp->v_mount->mnt_flag & MNT_RDONLY) 263 return (EROFS); 264 break; 265 default: 266 break; 267 } 268 } 269 270 return (vaccess(vp->v_type, file_mode, pmp->pm_uid, pmp->pm_gid, 271 ap->a_mode, ap->a_cred, NULL)); 272 } 273 274 static int 275 msdosfs_getattr(ap) 276 struct vop_getattr_args /* { 277 struct vnode *a_vp; 278 struct vattr *a_vap; 279 struct ucred *a_cred; 280 struct thread *a_td; 281 } */ *ap; 282 { 283 struct denode *dep = VTODE(ap->a_vp); 284 struct msdosfsmount *pmp = dep->de_pmp; 285 struct vattr *vap = ap->a_vap; 286 mode_t mode; 287 struct timespec ts; 288 u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 289 uint64_t fileid; 290 291 getnanotime(&ts); 292 DETIMES(dep, &ts, &ts, &ts); 293 vap->va_fsid = dev2udev(dep->de_dev); 294 /* 295 * The following computation of the fileid must be the same as that 296 * used in msdosfs_readdir() to compute d_fileno. If not, pwd 297 * doesn't work. 298 */ 299 if (dep->de_Attributes & ATTR_DIRECTORY) { 300 fileid = (uint64_t)cntobn(pmp, dep->de_StartCluster) * 301 dirsperblk; 302 if (dep->de_StartCluster == MSDOSFSROOT) 303 fileid = 1; 304 } else { 305 fileid = (uint64_t)cntobn(pmp, dep->de_dirclust) * 306 dirsperblk; 307 if (dep->de_dirclust == MSDOSFSROOT) 308 fileid = (uint64_t)roottobn(pmp, 0) * dirsperblk; 309 fileid += (uint64_t)dep->de_diroffset / sizeof(struct direntry); 310 } 311 #ifdef MSDOSFS_LARGE 312 vap->va_fileid = msdosfs_fileno_map(pmp->pm_mountp, fileid); 313 #else 314 vap->va_fileid = (long)fileid; 315 #endif 316 if ((dep->de_Attributes & ATTR_READONLY) == 0) 317 mode = S_IRWXU|S_IRWXG|S_IRWXO; 318 else 319 mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 320 vap->va_mode = mode & 321 (ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask); 322 vap->va_uid = pmp->pm_uid; 323 vap->va_gid = pmp->pm_gid; 324 vap->va_nlink = 1; 325 vap->va_rdev = 0; 326 vap->va_size = dep->de_FileSize; 327 dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime); 328 if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) { 329 dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime); 330 dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime); 331 } else { 332 vap->va_atime = vap->va_mtime; 333 vap->va_ctime = vap->va_mtime; 334 } 335 vap->va_flags = 0; 336 if ((dep->de_Attributes & ATTR_ARCHIVE) == 0) 337 vap->va_flags |= SF_ARCHIVED; 338 vap->va_gen = 0; 339 vap->va_blocksize = pmp->pm_bpcluster; 340 vap->va_bytes = 341 (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask; 342 vap->va_type = ap->a_vp->v_type; 343 vap->va_filerev = dep->de_modrev; 344 return (0); 345 } 346 347 static int 348 msdosfs_setattr(ap) 349 struct vop_setattr_args /* { 350 struct vnode *a_vp; 351 struct vattr *a_vap; 352 struct ucred *a_cred; 353 struct thread *a_td; 354 } */ *ap; 355 { 356 struct vnode *vp = ap->a_vp; 357 struct denode *dep = VTODE(ap->a_vp); 358 struct msdosfsmount *pmp = dep->de_pmp; 359 struct vattr *vap = ap->a_vap; 360 struct ucred *cred = ap->a_cred; 361 int error = 0; 362 363 #ifdef MSDOSFS_DEBUG 364 printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n", 365 ap->a_vp, vap, cred, ap->a_td); 366 #endif 367 368 /* 369 * Check for unsettable attributes. 370 */ 371 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 372 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 373 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 374 (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 375 #ifdef MSDOSFS_DEBUG 376 printf("msdosfs_setattr(): returning EINVAL\n"); 377 printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n", 378 vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid); 379 printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n", 380 vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen); 381 printf(" va_uid %x, va_gid %x\n", 382 vap->va_uid, vap->va_gid); 383 #endif 384 return (EINVAL); 385 } 386 if (vap->va_flags != VNOVAL) { 387 if (vp->v_mount->mnt_flag & MNT_RDONLY) 388 return (EROFS); 389 if (cred->cr_uid != pmp->pm_uid && 390 (error = suser_cred(cred, SUSER_ALLOWJAIL))) 391 return (error); 392 /* 393 * We are very inconsistent about handling unsupported 394 * attributes. We ignored the access time and the 395 * read and execute bits. We were strict for the other 396 * attributes. 397 * 398 * Here we are strict, stricter than ufs in not allowing 399 * users to attempt to set SF_SETTABLE bits or anyone to 400 * set unsupported bits. However, we ignore attempts to 401 * set ATTR_ARCHIVE for directories `cp -pr' from a more 402 * sensible filesystem attempts it a lot. 403 */ 404 if (suser_cred(cred, SUSER_ALLOWJAIL)) { 405 if (vap->va_flags & SF_SETTABLE) 406 return EPERM; 407 } 408 if (vap->va_flags & ~SF_ARCHIVED) 409 return EOPNOTSUPP; 410 if (vap->va_flags & SF_ARCHIVED) 411 dep->de_Attributes &= ~ATTR_ARCHIVE; 412 else if (!(dep->de_Attributes & ATTR_DIRECTORY)) 413 dep->de_Attributes |= ATTR_ARCHIVE; 414 dep->de_flag |= DE_MODIFIED; 415 } 416 417 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 418 uid_t uid; 419 gid_t gid; 420 421 if (vp->v_mount->mnt_flag & MNT_RDONLY) 422 return (EROFS); 423 uid = vap->va_uid; 424 if (uid == (uid_t)VNOVAL) 425 uid = pmp->pm_uid; 426 gid = vap->va_gid; 427 if (gid == (gid_t)VNOVAL) 428 gid = pmp->pm_gid; 429 if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid || 430 (gid != pmp->pm_gid && !groupmember(gid, cred))) && 431 (error = suser_cred(cred, SUSER_ALLOWJAIL))) 432 return error; 433 if (uid != pmp->pm_uid || gid != pmp->pm_gid) 434 return EINVAL; 435 } 436 437 if (vap->va_size != VNOVAL) { 438 /* 439 * Disallow write attempts on read-only filesystems; 440 * unless the file is a socket, fifo, or a block or 441 * character device resident on the filesystem. 442 */ 443 switch (vp->v_type) { 444 case VDIR: 445 return (EISDIR); 446 /* NOT REACHED */ 447 case VLNK: 448 case VREG: 449 if (vp->v_mount->mnt_flag & MNT_RDONLY) 450 return (EROFS); 451 break; 452 default: 453 break; 454 } 455 error = detrunc(dep, vap->va_size, 0, cred, ap->a_td); 456 if (error) 457 return error; 458 } 459 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) { 460 if (vp->v_mount->mnt_flag & MNT_RDONLY) 461 return (EROFS); 462 if (cred->cr_uid != pmp->pm_uid && 463 (error = suser_cred(cred, SUSER_ALLOWJAIL)) && 464 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 465 (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_td)))) 466 return (error); 467 if (vp->v_type != VDIR) { 468 if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 && 469 vap->va_atime.tv_sec != VNOVAL) { 470 dep->de_flag &= ~DE_ACCESS; 471 unix2dostime(&vap->va_atime, &dep->de_ADate, 472 NULL, NULL); 473 } 474 if (vap->va_mtime.tv_sec != VNOVAL) { 475 dep->de_flag &= ~DE_UPDATE; 476 unix2dostime(&vap->va_mtime, &dep->de_MDate, 477 &dep->de_MTime, NULL); 478 } 479 dep->de_Attributes |= ATTR_ARCHIVE; 480 dep->de_flag |= DE_MODIFIED; 481 } 482 } 483 /* 484 * DOS files only have the ability to have their writability 485 * attribute set, so we use the owner write bit to set the readonly 486 * attribute. 487 */ 488 if (vap->va_mode != (mode_t)VNOVAL) { 489 if (vp->v_mount->mnt_flag & MNT_RDONLY) 490 return (EROFS); 491 if (cred->cr_uid != pmp->pm_uid && 492 (error = suser_cred(cred, SUSER_ALLOWJAIL))) 493 return (error); 494 if (vp->v_type != VDIR) { 495 /* We ignore the read and execute bits. */ 496 if (vap->va_mode & VWRITE) 497 dep->de_Attributes &= ~ATTR_READONLY; 498 else 499 dep->de_Attributes |= ATTR_READONLY; 500 dep->de_Attributes |= ATTR_ARCHIVE; 501 dep->de_flag |= DE_MODIFIED; 502 } 503 } 504 return (deupdat(dep, 1)); 505 } 506 507 static int 508 msdosfs_read(ap) 509 struct vop_read_args /* { 510 struct vnode *a_vp; 511 struct uio *a_uio; 512 int a_ioflag; 513 struct ucred *a_cred; 514 } */ *ap; 515 { 516 int error = 0; 517 int blsize; 518 int isadir; 519 int orig_resid; 520 u_int n; 521 u_long diff; 522 u_long on; 523 daddr_t lbn; 524 daddr_t rablock; 525 int rasize; 526 int seqcount; 527 struct buf *bp; 528 struct vnode *vp = ap->a_vp; 529 struct denode *dep = VTODE(vp); 530 struct msdosfsmount *pmp = dep->de_pmp; 531 struct uio *uio = ap->a_uio; 532 533 if (uio->uio_offset < 0) 534 return (EINVAL); 535 536 if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX) 537 return (0); 538 /* 539 * If they didn't ask for any data, then we are done. 540 */ 541 orig_resid = uio->uio_resid; 542 if (orig_resid <= 0) 543 return (0); 544 545 seqcount = ap->a_ioflag >> IO_SEQSHIFT; 546 547 isadir = dep->de_Attributes & ATTR_DIRECTORY; 548 do { 549 if (uio->uio_offset >= dep->de_FileSize) 550 break; 551 lbn = de_cluster(pmp, uio->uio_offset); 552 /* 553 * If we are operating on a directory file then be sure to 554 * do i/o with the vnode for the filesystem instead of the 555 * vnode for the directory. 556 */ 557 if (isadir) { 558 /* convert cluster # to block # */ 559 error = pcbmap(dep, lbn, &lbn, 0, &blsize); 560 if (error == E2BIG) { 561 error = EINVAL; 562 break; 563 } else if (error) 564 break; 565 error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp); 566 } else { 567 blsize = pmp->pm_bpcluster; 568 rablock = lbn + 1; 569 if (seqcount > 1 && 570 de_cn2off(pmp, rablock) < dep->de_FileSize) { 571 rasize = pmp->pm_bpcluster; 572 error = breadn(vp, lbn, blsize, 573 &rablock, &rasize, 1, NOCRED, &bp); 574 } else { 575 error = bread(vp, lbn, blsize, NOCRED, &bp); 576 } 577 } 578 if (error) { 579 brelse(bp); 580 break; 581 } 582 on = uio->uio_offset & pmp->pm_crbomask; 583 diff = pmp->pm_bpcluster - on; 584 n = diff > uio->uio_resid ? uio->uio_resid : diff; 585 diff = dep->de_FileSize - uio->uio_offset; 586 if (diff < n) 587 n = diff; 588 diff = blsize - bp->b_resid; 589 if (diff < n) 590 n = diff; 591 error = uiomove(bp->b_data + on, (int) n, uio); 592 brelse(bp); 593 } while (error == 0 && uio->uio_resid > 0 && n != 0); 594 if (!isadir && (error == 0 || uio->uio_resid != orig_resid) && 595 (vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 596 dep->de_flag |= DE_ACCESS; 597 return (error); 598 } 599 600 /* 601 * Write data to a file or directory. 602 */ 603 static int 604 msdosfs_write(ap) 605 struct vop_write_args /* { 606 struct vnode *a_vp; 607 struct uio *a_uio; 608 int a_ioflag; 609 struct ucred *a_cred; 610 } */ *ap; 611 { 612 int n; 613 int croffset; 614 int resid; 615 u_long osize; 616 int error = 0; 617 u_long count; 618 daddr_t bn, lastcn; 619 struct buf *bp; 620 int ioflag = ap->a_ioflag; 621 struct uio *uio = ap->a_uio; 622 struct thread *td = uio->uio_td; 623 struct vnode *vp = ap->a_vp; 624 struct vnode *thisvp; 625 struct denode *dep = VTODE(vp); 626 struct msdosfsmount *pmp = dep->de_pmp; 627 struct ucred *cred = ap->a_cred; 628 629 #ifdef MSDOSFS_DEBUG 630 printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n", 631 vp, uio, ioflag, cred); 632 printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n", 633 dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster); 634 #endif 635 636 switch (vp->v_type) { 637 case VREG: 638 if (ioflag & IO_APPEND) 639 uio->uio_offset = dep->de_FileSize; 640 thisvp = vp; 641 break; 642 case VDIR: 643 return EISDIR; 644 default: 645 panic("msdosfs_write(): bad file type"); 646 } 647 648 if (uio->uio_offset < 0) 649 return (EFBIG); 650 651 if (uio->uio_resid == 0) 652 return (0); 653 654 /* 655 * If they've exceeded their filesize limit, tell them about it. 656 */ 657 if (td != NULL) { 658 PROC_LOCK(td->td_proc); 659 if ((uoff_t)uio->uio_offset + uio->uio_resid > 660 lim_cur(td->td_proc, RLIMIT_FSIZE)) { 661 psignal(td->td_proc, SIGXFSZ); 662 PROC_UNLOCK(td->td_proc); 663 return (EFBIG); 664 } 665 PROC_UNLOCK(td->td_proc); 666 } 667 668 if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX) 669 return (EFBIG); 670 671 /* 672 * If the offset we are starting the write at is beyond the end of 673 * the file, then they've done a seek. Unix filesystems allow 674 * files with holes in them, DOS doesn't so we must fill the hole 675 * with zeroed blocks. 676 */ 677 if (uio->uio_offset > dep->de_FileSize) { 678 error = deextend(dep, uio->uio_offset, cred); 679 if (error) 680 return (error); 681 } 682 683 /* 684 * Remember some values in case the write fails. 685 */ 686 resid = uio->uio_resid; 687 osize = dep->de_FileSize; 688 689 /* 690 * If we write beyond the end of the file, extend it to its ultimate 691 * size ahead of the time to hopefully get a contiguous area. 692 */ 693 if (uio->uio_offset + resid > osize) { 694 count = de_clcount(pmp, uio->uio_offset + resid) - 695 de_clcount(pmp, osize); 696 error = extendfile(dep, count, NULL, NULL, 0); 697 if (error && (error != ENOSPC || (ioflag & IO_UNIT))) 698 goto errexit; 699 lastcn = dep->de_fc[FC_LASTFC].fc_frcn; 700 } else 701 lastcn = de_clcount(pmp, osize) - 1; 702 703 do { 704 if (de_cluster(pmp, uio->uio_offset) > lastcn) { 705 error = ENOSPC; 706 break; 707 } 708 709 croffset = uio->uio_offset & pmp->pm_crbomask; 710 n = min(uio->uio_resid, pmp->pm_bpcluster - croffset); 711 if (uio->uio_offset + n > dep->de_FileSize) { 712 dep->de_FileSize = uio->uio_offset + n; 713 /* The object size needs to be set before buffer is allocated */ 714 vnode_pager_setsize(vp, dep->de_FileSize); 715 } 716 717 bn = de_cluster(pmp, uio->uio_offset); 718 if ((uio->uio_offset & pmp->pm_crbomask) == 0 719 && (de_cluster(pmp, uio->uio_offset + uio->uio_resid) 720 > de_cluster(pmp, uio->uio_offset) 721 || uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) { 722 /* 723 * If either the whole cluster gets written, 724 * or we write the cluster from its start beyond EOF, 725 * then no need to read data from disk. 726 */ 727 bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0, 0); 728 clrbuf(bp); 729 /* 730 * Do the bmap now, since pcbmap needs buffers 731 * for the fat table. (see msdosfs_strategy) 732 */ 733 if (bp->b_blkno == bp->b_lblkno) { 734 error = pcbmap(dep, bp->b_lblkno, &bn, 0, 0); 735 if (error) 736 bp->b_blkno = -1; 737 else 738 bp->b_blkno = bn; 739 } 740 if (bp->b_blkno == -1) { 741 brelse(bp); 742 if (!error) 743 error = EIO; /* XXX */ 744 break; 745 } 746 } else { 747 /* 748 * The block we need to write into exists, so read it in. 749 */ 750 error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp); 751 if (error) { 752 brelse(bp); 753 break; 754 } 755 } 756 757 /* 758 * Should these vnode_pager_* functions be done on dir 759 * files? 760 */ 761 762 /* 763 * Copy the data from user space into the buf header. 764 */ 765 error = uiomove(bp->b_data + croffset, n, uio); 766 if (error) { 767 brelse(bp); 768 break; 769 } 770 771 /* 772 * If they want this synchronous then write it and wait for 773 * it. Otherwise, if on a cluster boundary write it 774 * asynchronously so we can move on to the next block 775 * without delay. Otherwise do a delayed write because we 776 * may want to write somemore into the block later. 777 */ 778 if (ioflag & IO_SYNC) 779 (void) bwrite(bp); 780 else if (n + croffset == pmp->pm_bpcluster) 781 bawrite(bp); 782 else 783 bdwrite(bp); 784 dep->de_flag |= DE_UPDATE; 785 } while (error == 0 && uio->uio_resid > 0); 786 787 /* 788 * If the write failed and they want us to, truncate the file back 789 * to the size it was before the write was attempted. 790 */ 791 errexit: 792 if (error) { 793 if (ioflag & IO_UNIT) { 794 detrunc(dep, osize, ioflag & IO_SYNC, NOCRED, NULL); 795 uio->uio_offset -= resid - uio->uio_resid; 796 uio->uio_resid = resid; 797 } else { 798 detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL); 799 if (uio->uio_resid != resid) 800 error = 0; 801 } 802 } else if (ioflag & IO_SYNC) 803 error = deupdat(dep, 1); 804 return (error); 805 } 806 807 /* 808 * Flush the blocks of a file to disk. 809 * 810 * This function is worthless for vnodes that represent directories. Maybe we 811 * could just do a sync if they try an fsync on a directory file. 812 */ 813 static int 814 msdosfs_fsync(ap) 815 struct vop_fsync_args /* { 816 struct vnode *a_vp; 817 struct ucred *a_cred; 818 int a_waitfor; 819 struct thread *a_td; 820 } */ *ap; 821 { 822 /* 823 * Flush our dirty buffers. 824 */ 825 vop_stdfsync(ap); 826 827 return (deupdat(VTODE(ap->a_vp), ap->a_waitfor == MNT_WAIT)); 828 } 829 830 static int 831 msdosfs_remove(ap) 832 struct vop_remove_args /* { 833 struct vnode *a_dvp; 834 struct vnode *a_vp; 835 struct componentname *a_cnp; 836 } */ *ap; 837 { 838 struct denode *dep = VTODE(ap->a_vp); 839 struct denode *ddep = VTODE(ap->a_dvp); 840 int error; 841 842 if (ap->a_vp->v_type == VDIR) 843 error = EPERM; 844 else 845 error = removede(ddep, dep); 846 #ifdef MSDOSFS_DEBUG 847 printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount); 848 #endif 849 return (error); 850 } 851 852 /* 853 * DOS filesystems don't know what links are. 854 */ 855 static int 856 msdosfs_link(ap) 857 struct vop_link_args /* { 858 struct vnode *a_tdvp; 859 struct vnode *a_vp; 860 struct componentname *a_cnp; 861 } */ *ap; 862 { 863 return (EOPNOTSUPP); 864 } 865 866 /* 867 * Renames on files require moving the denode to a new hash queue since the 868 * denode's location is used to compute which hash queue to put the file 869 * in. Unless it is a rename in place. For example "mv a b". 870 * 871 * What follows is the basic algorithm: 872 * 873 * if (file move) { 874 * if (dest file exists) { 875 * remove dest file 876 * } 877 * if (dest and src in same directory) { 878 * rewrite name in existing directory slot 879 * } else { 880 * write new entry in dest directory 881 * update offset and dirclust in denode 882 * move denode to new hash chain 883 * clear old directory entry 884 * } 885 * } else { 886 * directory move 887 * if (dest directory exists) { 888 * if (dest is not empty) { 889 * return ENOTEMPTY 890 * } 891 * remove dest directory 892 * } 893 * if (dest and src in same directory) { 894 * rewrite name in existing entry 895 * } else { 896 * be sure dest is not a child of src directory 897 * write entry in dest directory 898 * update "." and ".." in moved directory 899 * clear old directory entry for moved directory 900 * } 901 * } 902 * 903 * On entry: 904 * source's parent directory is unlocked 905 * source file or directory is unlocked 906 * destination's parent directory is locked 907 * destination file or directory is locked if it exists 908 * 909 * On exit: 910 * all denodes should be released 911 */ 912 static int 913 msdosfs_rename(ap) 914 struct vop_rename_args /* { 915 struct vnode *a_fdvp; 916 struct vnode *a_fvp; 917 struct componentname *a_fcnp; 918 struct vnode *a_tdvp; 919 struct vnode *a_tvp; 920 struct componentname *a_tcnp; 921 } */ *ap; 922 { 923 struct vnode *tdvp = ap->a_tdvp; 924 struct vnode *fvp = ap->a_fvp; 925 struct vnode *fdvp = ap->a_fdvp; 926 struct vnode *tvp = ap->a_tvp; 927 struct componentname *tcnp = ap->a_tcnp; 928 struct componentname *fcnp = ap->a_fcnp; 929 struct thread *td = fcnp->cn_thread; 930 struct denode *ip, *xp, *dp, *zp; 931 u_char toname[11], oldname[11]; 932 u_long from_diroffset, to_diroffset; 933 u_char to_count; 934 int doingdirectory = 0, newparent = 0; 935 int error; 936 u_long cn; 937 daddr_t bn; 938 struct denode *fddep; /* from file's parent directory */ 939 struct msdosfsmount *pmp; 940 struct direntry *dotdotp; 941 struct buf *bp; 942 943 fddep = VTODE(ap->a_fdvp); 944 pmp = fddep->de_pmp; 945 946 pmp = VFSTOMSDOSFS(fdvp->v_mount); 947 948 #ifdef DIAGNOSTIC 949 if ((tcnp->cn_flags & HASBUF) == 0 || 950 (fcnp->cn_flags & HASBUF) == 0) 951 panic("msdosfs_rename: no name"); 952 #endif 953 /* 954 * Check for cross-device rename. 955 */ 956 if ((fvp->v_mount != tdvp->v_mount) || 957 (tvp && (fvp->v_mount != tvp->v_mount))) { 958 error = EXDEV; 959 abortit: 960 if (tdvp == tvp) 961 vrele(tdvp); 962 else 963 vput(tdvp); 964 if (tvp) 965 vput(tvp); 966 vrele(fdvp); 967 vrele(fvp); 968 return (error); 969 } 970 971 /* 972 * If source and dest are the same, do nothing. 973 */ 974 if (tvp == fvp) { 975 error = 0; 976 goto abortit; 977 } 978 979 error = vn_lock(fvp, LK_EXCLUSIVE, td); 980 if (error) 981 goto abortit; 982 dp = VTODE(fdvp); 983 ip = VTODE(fvp); 984 985 /* 986 * Be sure we are not renaming ".", "..", or an alias of ".". This 987 * leads to a crippled directory tree. It's pretty tough to do a 988 * "ls" or "pwd" with the "." directory entry missing, and "cd .." 989 * doesn't work if the ".." entry is missing. 990 */ 991 if (ip->de_Attributes & ATTR_DIRECTORY) { 992 /* 993 * Avoid ".", "..", and aliases of "." for obvious reasons. 994 */ 995 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 996 dp == ip || 997 (fcnp->cn_flags & ISDOTDOT) || 998 (tcnp->cn_flags & ISDOTDOT) || 999 (ip->de_flag & DE_RENAME)) { 1000 VOP_UNLOCK(fvp, 0, td); 1001 error = EINVAL; 1002 goto abortit; 1003 } 1004 ip->de_flag |= DE_RENAME; 1005 doingdirectory++; 1006 } 1007 1008 /* 1009 * When the target exists, both the directory 1010 * and target vnodes are returned locked. 1011 */ 1012 dp = VTODE(tdvp); 1013 xp = tvp ? VTODE(tvp) : NULL; 1014 /* 1015 * Remember direntry place to use for destination 1016 */ 1017 to_diroffset = dp->de_fndoffset; 1018 to_count = dp->de_fndcnt; 1019 1020 /* 1021 * If ".." must be changed (ie the directory gets a new 1022 * parent) then the source directory must not be in the 1023 * directory heirarchy above the target, as this would 1024 * orphan everything below the source directory. Also 1025 * the user must have write permission in the source so 1026 * as to be able to change "..". We must repeat the call 1027 * to namei, as the parent directory is unlocked by the 1028 * call to doscheckpath(). 1029 */ 1030 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); 1031 VOP_UNLOCK(fvp, 0, td); 1032 if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster) 1033 newparent = 1; 1034 if (doingdirectory && newparent) { 1035 if (error) /* write access check above */ 1036 goto bad; 1037 if (xp != NULL) 1038 vput(tvp); 1039 /* 1040 * doscheckpath() vput()'s dp, 1041 * so we have to do a relookup afterwards 1042 */ 1043 error = doscheckpath(ip, dp); 1044 if (error) 1045 goto out; 1046 if ((tcnp->cn_flags & SAVESTART) == 0) 1047 panic("msdosfs_rename: lost to startdir"); 1048 error = relookup(tdvp, &tvp, tcnp); 1049 if (error) 1050 goto out; 1051 dp = VTODE(tdvp); 1052 xp = tvp ? VTODE(tvp) : NULL; 1053 } 1054 1055 if (xp != NULL) { 1056 /* 1057 * Target must be empty if a directory and have no links 1058 * to it. Also, ensure source and target are compatible 1059 * (both directories, or both not directories). 1060 */ 1061 if (xp->de_Attributes & ATTR_DIRECTORY) { 1062 if (!dosdirempty(xp)) { 1063 error = ENOTEMPTY; 1064 goto bad; 1065 } 1066 if (!doingdirectory) { 1067 error = ENOTDIR; 1068 goto bad; 1069 } 1070 cache_purge(tdvp); 1071 } else if (doingdirectory) { 1072 error = EISDIR; 1073 goto bad; 1074 } 1075 error = removede(dp, xp); 1076 if (error) 1077 goto bad; 1078 vput(tvp); 1079 xp = NULL; 1080 } 1081 1082 /* 1083 * Convert the filename in tcnp into a dos filename. We copy this 1084 * into the denode and directory entry for the destination 1085 * file/directory. 1086 */ 1087 error = uniqdosname(VTODE(tdvp), tcnp, toname); 1088 if (error) 1089 goto abortit; 1090 1091 /* 1092 * Since from wasn't locked at various places above, 1093 * have to do a relookup here. 1094 */ 1095 fcnp->cn_flags &= ~MODMASK; 1096 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1097 if ((fcnp->cn_flags & SAVESTART) == 0) 1098 panic("msdosfs_rename: lost from startdir"); 1099 if (!newparent) 1100 VOP_UNLOCK(tdvp, 0, td); 1101 if (relookup(fdvp, &fvp, fcnp) == 0) 1102 vrele(fdvp); 1103 if (fvp == NULL) { 1104 /* 1105 * From name has disappeared. 1106 */ 1107 if (doingdirectory) 1108 panic("rename: lost dir entry"); 1109 vrele(ap->a_fvp); 1110 if (newparent) 1111 VOP_UNLOCK(tdvp, 0, td); 1112 vrele(tdvp); 1113 return 0; 1114 } 1115 xp = VTODE(fvp); 1116 zp = VTODE(fdvp); 1117 from_diroffset = zp->de_fndoffset; 1118 1119 /* 1120 * Ensure that the directory entry still exists and has not 1121 * changed till now. If the source is a file the entry may 1122 * have been unlinked or renamed. In either case there is 1123 * no further work to be done. If the source is a directory 1124 * then it cannot have been rmdir'ed or renamed; this is 1125 * prohibited by the DE_RENAME flag. 1126 */ 1127 if (xp != ip) { 1128 if (doingdirectory) 1129 panic("rename: lost dir entry"); 1130 vrele(ap->a_fvp); 1131 VOP_UNLOCK(fvp, 0, td); 1132 if (newparent) 1133 VOP_UNLOCK(fdvp, 0, td); 1134 xp = NULL; 1135 } else { 1136 vrele(fvp); 1137 xp = NULL; 1138 1139 /* 1140 * First write a new entry in the destination 1141 * directory and mark the entry in the source directory 1142 * as deleted. Then move the denode to the correct hash 1143 * chain for its new location in the filesystem. And, if 1144 * we moved a directory, then update its .. entry to point 1145 * to the new parent directory. 1146 */ 1147 bcopy(ip->de_Name, oldname, 11); 1148 bcopy(toname, ip->de_Name, 11); /* update denode */ 1149 dp->de_fndoffset = to_diroffset; 1150 dp->de_fndcnt = to_count; 1151 error = createde(ip, dp, (struct denode **)0, tcnp); 1152 if (error) { 1153 bcopy(oldname, ip->de_Name, 11); 1154 if (newparent) 1155 VOP_UNLOCK(fdvp, 0, td); 1156 VOP_UNLOCK(fvp, 0, td); 1157 goto bad; 1158 } 1159 ip->de_refcnt++; 1160 zp->de_fndoffset = from_diroffset; 1161 error = removede(zp, ip); 1162 if (error) { 1163 /* XXX should really panic here, fs is corrupt */ 1164 if (newparent) 1165 VOP_UNLOCK(fdvp, 0, td); 1166 VOP_UNLOCK(fvp, 0, td); 1167 goto bad; 1168 } 1169 if (!doingdirectory) { 1170 error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0, 1171 &ip->de_dirclust, 0); 1172 if (error) { 1173 /* XXX should really panic here, fs is corrupt */ 1174 if (newparent) 1175 VOP_UNLOCK(fdvp, 0, td); 1176 VOP_UNLOCK(fvp, 0, td); 1177 goto bad; 1178 } 1179 if (ip->de_dirclust == MSDOSFSROOT) 1180 ip->de_diroffset = to_diroffset; 1181 else 1182 ip->de_diroffset = to_diroffset & pmp->pm_crbomask; 1183 } 1184 reinsert(ip); 1185 if (newparent) 1186 VOP_UNLOCK(fdvp, 0, td); 1187 } 1188 1189 /* 1190 * If we moved a directory to a new parent directory, then we must 1191 * fixup the ".." entry in the moved directory. 1192 */ 1193 if (doingdirectory && newparent) { 1194 cn = ip->de_StartCluster; 1195 if (cn == MSDOSFSROOT) { 1196 /* this should never happen */ 1197 panic("msdosfs_rename(): updating .. in root directory?"); 1198 } else 1199 bn = cntobn(pmp, cn); 1200 error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster, 1201 NOCRED, &bp); 1202 if (error) { 1203 /* XXX should really panic here, fs is corrupt */ 1204 brelse(bp); 1205 VOP_UNLOCK(fvp, 0, td); 1206 goto bad; 1207 } 1208 dotdotp = (struct direntry *)bp->b_data + 1; 1209 putushort(dotdotp->deStartCluster, dp->de_StartCluster); 1210 if (FAT32(pmp)) 1211 putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16); 1212 error = bwrite(bp); 1213 if (error) { 1214 /* XXX should really panic here, fs is corrupt */ 1215 VOP_UNLOCK(fvp, 0, td); 1216 goto bad; 1217 } 1218 } 1219 1220 VOP_UNLOCK(fvp, 0, td); 1221 bad: 1222 if (xp) 1223 vput(tvp); 1224 vput(tdvp); 1225 out: 1226 ip->de_flag &= ~DE_RENAME; 1227 vrele(fdvp); 1228 vrele(fvp); 1229 return (error); 1230 1231 } 1232 1233 static struct { 1234 struct direntry dot; 1235 struct direntry dotdot; 1236 } dosdirtemplate = { 1237 { ". ", " ", /* the . entry */ 1238 ATTR_DIRECTORY, /* file attribute */ 1239 0, /* reserved */ 1240 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1241 { 0, 0 }, /* access date */ 1242 { 0, 0 }, /* high bits of start cluster */ 1243 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1244 { 0, 0 }, /* startcluster */ 1245 { 0, 0, 0, 0 } /* filesize */ 1246 }, 1247 { ".. ", " ", /* the .. entry */ 1248 ATTR_DIRECTORY, /* file attribute */ 1249 0, /* reserved */ 1250 0, { 0, 0 }, { 0, 0 }, /* create time & date */ 1251 { 0, 0 }, /* access date */ 1252 { 0, 0 }, /* high bits of start cluster */ 1253 { 210, 4 }, { 210, 4 }, /* modify time & date */ 1254 { 0, 0 }, /* startcluster */ 1255 { 0, 0, 0, 0 } /* filesize */ 1256 } 1257 }; 1258 1259 static int 1260 msdosfs_mkdir(ap) 1261 struct vop_mkdir_args /* { 1262 struct vnode *a_dvp; 1263 struvt vnode **a_vpp; 1264 struvt componentname *a_cnp; 1265 struct vattr *a_vap; 1266 } */ *ap; 1267 { 1268 struct componentname *cnp = ap->a_cnp; 1269 struct denode *dep; 1270 struct denode *pdep = VTODE(ap->a_dvp); 1271 struct direntry *denp; 1272 struct msdosfsmount *pmp = pdep->de_pmp; 1273 struct buf *bp; 1274 u_long newcluster, pcl; 1275 int bn; 1276 int error; 1277 struct denode ndirent; 1278 struct timespec ts; 1279 1280 /* 1281 * If this is the root directory and there is no space left we 1282 * can't do anything. This is because the root directory can not 1283 * change size. 1284 */ 1285 if (pdep->de_StartCluster == MSDOSFSROOT 1286 && pdep->de_fndoffset >= pdep->de_FileSize) { 1287 error = ENOSPC; 1288 goto bad2; 1289 } 1290 1291 /* 1292 * Allocate a cluster to hold the about to be created directory. 1293 */ 1294 error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL); 1295 if (error) 1296 goto bad2; 1297 1298 bzero(&ndirent, sizeof(ndirent)); 1299 ndirent.de_pmp = pmp; 1300 ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE; 1301 getnanotime(&ts); 1302 DETIMES(&ndirent, &ts, &ts, &ts); 1303 1304 /* 1305 * Now fill the cluster with the "." and ".." entries. And write 1306 * the cluster to disk. This way it is there for the parent 1307 * directory to be pointing at if there were a crash. 1308 */ 1309 bn = cntobn(pmp, newcluster); 1310 /* always succeeds */ 1311 bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0, 0); 1312 bzero(bp->b_data, pmp->pm_bpcluster); 1313 bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate); 1314 denp = (struct direntry *)bp->b_data; 1315 putushort(denp[0].deStartCluster, newcluster); 1316 putushort(denp[0].deCDate, ndirent.de_CDate); 1317 putushort(denp[0].deCTime, ndirent.de_CTime); 1318 denp[0].deCHundredth = ndirent.de_CHun; 1319 putushort(denp[0].deADate, ndirent.de_ADate); 1320 putushort(denp[0].deMDate, ndirent.de_MDate); 1321 putushort(denp[0].deMTime, ndirent.de_MTime); 1322 pcl = pdep->de_StartCluster; 1323 if (FAT32(pmp) && pcl == pmp->pm_rootdirblk) 1324 pcl = 0; 1325 putushort(denp[1].deStartCluster, pcl); 1326 putushort(denp[1].deCDate, ndirent.de_CDate); 1327 putushort(denp[1].deCTime, ndirent.de_CTime); 1328 denp[1].deCHundredth = ndirent.de_CHun; 1329 putushort(denp[1].deADate, ndirent.de_ADate); 1330 putushort(denp[1].deMDate, ndirent.de_MDate); 1331 putushort(denp[1].deMTime, ndirent.de_MTime); 1332 if (FAT32(pmp)) { 1333 putushort(denp[0].deHighClust, newcluster >> 16); 1334 putushort(denp[1].deHighClust, pdep->de_StartCluster >> 16); 1335 } 1336 1337 error = bwrite(bp); 1338 if (error) 1339 goto bad; 1340 1341 /* 1342 * Now build up a directory entry pointing to the newly allocated 1343 * cluster. This will be written to an empty slot in the parent 1344 * directory. 1345 */ 1346 #ifdef DIAGNOSTIC 1347 if ((cnp->cn_flags & HASBUF) == 0) 1348 panic("msdosfs_mkdir: no name"); 1349 #endif 1350 error = uniqdosname(pdep, cnp, ndirent.de_Name); 1351 if (error) 1352 goto bad; 1353 1354 ndirent.de_Attributes = ATTR_DIRECTORY; 1355 ndirent.de_LowerCase = 0; 1356 ndirent.de_StartCluster = newcluster; 1357 ndirent.de_FileSize = 0; 1358 ndirent.de_dev = pdep->de_dev; 1359 ndirent.de_devvp = pdep->de_devvp; 1360 error = createde(&ndirent, pdep, &dep, cnp); 1361 if (error) 1362 goto bad; 1363 *ap->a_vpp = DETOV(dep); 1364 return (0); 1365 1366 bad: 1367 clusterfree(pmp, newcluster, NULL); 1368 bad2: 1369 return (error); 1370 } 1371 1372 static int 1373 msdosfs_rmdir(ap) 1374 struct vop_rmdir_args /* { 1375 struct vnode *a_dvp; 1376 struct vnode *a_vp; 1377 struct componentname *a_cnp; 1378 } */ *ap; 1379 { 1380 struct vnode *vp = ap->a_vp; 1381 struct vnode *dvp = ap->a_dvp; 1382 struct componentname *cnp = ap->a_cnp; 1383 struct denode *ip, *dp; 1384 struct thread *td = cnp->cn_thread; 1385 int error; 1386 1387 ip = VTODE(vp); 1388 dp = VTODE(dvp); 1389 1390 /* 1391 * Verify the directory is empty (and valid). 1392 * (Rmdir ".." won't be valid since 1393 * ".." will contain a reference to 1394 * the current directory and thus be 1395 * non-empty.) 1396 */ 1397 error = 0; 1398 if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) { 1399 error = ENOTEMPTY; 1400 goto out; 1401 } 1402 /* 1403 * Delete the entry from the directory. For dos filesystems this 1404 * gets rid of the directory entry on disk, the in memory copy 1405 * still exists but the de_refcnt is <= 0. This prevents it from 1406 * being found by deget(). When the vput() on dep is done we give 1407 * up access and eventually msdosfs_reclaim() will be called which 1408 * will remove it from the denode cache. 1409 */ 1410 error = removede(dp, ip); 1411 if (error) 1412 goto out; 1413 /* 1414 * This is where we decrement the link count in the parent 1415 * directory. Since dos filesystems don't do this we just purge 1416 * the name cache. 1417 */ 1418 cache_purge(dvp); 1419 VOP_UNLOCK(dvp, 0, td); 1420 /* 1421 * Truncate the directory that is being deleted. 1422 */ 1423 error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, td); 1424 cache_purge(vp); 1425 1426 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td); 1427 out: 1428 return (error); 1429 } 1430 1431 /* 1432 * DOS filesystems don't know what symlinks are. 1433 */ 1434 static int 1435 msdosfs_symlink(ap) 1436 struct vop_symlink_args /* { 1437 struct vnode *a_dvp; 1438 struct vnode **a_vpp; 1439 struct componentname *a_cnp; 1440 struct vattr *a_vap; 1441 char *a_target; 1442 } */ *ap; 1443 { 1444 return (EOPNOTSUPP); 1445 } 1446 1447 static int 1448 msdosfs_readdir(ap) 1449 struct vop_readdir_args /* { 1450 struct vnode *a_vp; 1451 struct uio *a_uio; 1452 struct ucred *a_cred; 1453 int *a_eofflag; 1454 int *a_ncookies; 1455 u_long **a_cookies; 1456 } */ *ap; 1457 { 1458 int error = 0; 1459 int diff; 1460 long n; 1461 int blsize; 1462 long on; 1463 u_long cn; 1464 uint64_t fileno; 1465 u_long dirsperblk; 1466 long bias = 0; 1467 daddr_t bn, lbn; 1468 struct buf *bp; 1469 struct denode *dep = VTODE(ap->a_vp); 1470 struct msdosfsmount *pmp = dep->de_pmp; 1471 struct direntry *dentp; 1472 struct dirent dirbuf; 1473 struct uio *uio = ap->a_uio; 1474 u_long *cookies = NULL; 1475 int ncookies = 0; 1476 off_t offset, off; 1477 int chksum = -1; 1478 1479 #ifdef MSDOSFS_DEBUG 1480 printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n", 1481 ap->a_vp, uio, ap->a_cred, ap->a_eofflag); 1482 #endif 1483 1484 /* 1485 * msdosfs_readdir() won't operate properly on regular files since 1486 * it does i/o only with the the filesystem vnode, and hence can 1487 * retrieve the wrong block from the buffer cache for a plain file. 1488 * So, fail attempts to readdir() on a plain file. 1489 */ 1490 if ((dep->de_Attributes & ATTR_DIRECTORY) == 0) 1491 return (ENOTDIR); 1492 1493 /* 1494 * To be safe, initialize dirbuf 1495 */ 1496 bzero(dirbuf.d_name, sizeof(dirbuf.d_name)); 1497 1498 /* 1499 * If the user buffer is smaller than the size of one dos directory 1500 * entry or the file offset is not a multiple of the size of a 1501 * directory entry, then we fail the read. 1502 */ 1503 off = offset = uio->uio_offset; 1504 if (uio->uio_resid < sizeof(struct direntry) || 1505 (offset & (sizeof(struct direntry) - 1))) 1506 return (EINVAL); 1507 1508 if (ap->a_ncookies) { 1509 ncookies = uio->uio_resid / 16; 1510 MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP, 1511 M_WAITOK); 1512 *ap->a_cookies = cookies; 1513 *ap->a_ncookies = ncookies; 1514 } 1515 1516 dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry); 1517 1518 /* 1519 * If they are reading from the root directory then, we simulate 1520 * the . and .. entries since these don't exist in the root 1521 * directory. We also set the offset bias to make up for having to 1522 * simulate these entries. By this I mean that at file offset 64 we 1523 * read the first entry in the root directory that lives on disk. 1524 */ 1525 if (dep->de_StartCluster == MSDOSFSROOT 1526 || (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) { 1527 #if 0 1528 printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n", 1529 offset); 1530 #endif 1531 bias = 2 * sizeof(struct direntry); 1532 if (offset < bias) { 1533 for (n = (int)offset / sizeof(struct direntry); 1534 n < 2; n++) { 1535 if (FAT32(pmp)) 1536 fileno = (uint64_t)cntobn(pmp, 1537 pmp->pm_rootdirblk) 1538 * dirsperblk; 1539 else 1540 fileno = 1; 1541 #ifdef MSDOSFS_LARGE 1542 dirbuf.d_fileno = msdosfs_fileno_map( 1543 pmp->pm_mountp, fileno); 1544 #else 1545 dirbuf.d_fileno = (uint32_t)fileno; 1546 #endif 1547 dirbuf.d_type = DT_DIR; 1548 switch (n) { 1549 case 0: 1550 dirbuf.d_namlen = 1; 1551 strcpy(dirbuf.d_name, "."); 1552 break; 1553 case 1: 1554 dirbuf.d_namlen = 2; 1555 strcpy(dirbuf.d_name, ".."); 1556 break; 1557 } 1558 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1559 if (uio->uio_resid < dirbuf.d_reclen) 1560 goto out; 1561 error = uiomove(&dirbuf, dirbuf.d_reclen, uio); 1562 if (error) 1563 goto out; 1564 offset += sizeof(struct direntry); 1565 off = offset; 1566 if (cookies) { 1567 *cookies++ = offset; 1568 if (--ncookies <= 0) 1569 goto out; 1570 } 1571 } 1572 } 1573 } 1574 1575 mbnambuf_init(); 1576 off = offset; 1577 while (uio->uio_resid > 0) { 1578 lbn = de_cluster(pmp, offset - bias); 1579 on = (offset - bias) & pmp->pm_crbomask; 1580 n = min(pmp->pm_bpcluster - on, uio->uio_resid); 1581 diff = dep->de_FileSize - (offset - bias); 1582 if (diff <= 0) 1583 break; 1584 n = min(n, diff); 1585 error = pcbmap(dep, lbn, &bn, &cn, &blsize); 1586 if (error) 1587 break; 1588 error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp); 1589 if (error) { 1590 brelse(bp); 1591 return (error); 1592 } 1593 n = min(n, blsize - bp->b_resid); 1594 if (n == 0) { 1595 brelse(bp); 1596 return (EIO); 1597 } 1598 1599 /* 1600 * Convert from dos directory entries to fs-independent 1601 * directory entries. 1602 */ 1603 for (dentp = (struct direntry *)(bp->b_data + on); 1604 (char *)dentp < bp->b_data + on + n; 1605 dentp++, offset += sizeof(struct direntry)) { 1606 #if 0 1607 printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n", 1608 dentp, prev, crnt, dentp->deName[0], dentp->deAttributes); 1609 #endif 1610 /* 1611 * If this is an unused entry, we can stop. 1612 */ 1613 if (dentp->deName[0] == SLOT_EMPTY) { 1614 brelse(bp); 1615 goto out; 1616 } 1617 /* 1618 * Skip deleted entries. 1619 */ 1620 if (dentp->deName[0] == SLOT_DELETED) { 1621 chksum = -1; 1622 mbnambuf_init(); 1623 continue; 1624 } 1625 1626 /* 1627 * Handle Win95 long directory entries 1628 */ 1629 if (dentp->deAttributes == ATTR_WIN95) { 1630 if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME) 1631 continue; 1632 chksum = win2unixfn((struct winentry *)dentp, 1633 chksum, pmp); 1634 continue; 1635 } 1636 1637 /* 1638 * Skip volume labels 1639 */ 1640 if (dentp->deAttributes & ATTR_VOLUME) { 1641 chksum = -1; 1642 mbnambuf_init(); 1643 continue; 1644 } 1645 /* 1646 * This computation of d_fileno must match 1647 * the computation of va_fileid in 1648 * msdosfs_getattr. 1649 */ 1650 if (dentp->deAttributes & ATTR_DIRECTORY) { 1651 fileno = getushort(dentp->deStartCluster); 1652 if (FAT32(pmp)) 1653 fileno |= getushort(dentp->deHighClust) << 16; 1654 /* if this is the root directory */ 1655 if (fileno == MSDOSFSROOT) 1656 if (FAT32(pmp)) 1657 fileno = (uint64_t)cntobn(pmp, 1658 pmp->pm_rootdirblk) 1659 * dirsperblk; 1660 else 1661 fileno = 1; 1662 else 1663 fileno = (uint64_t)cntobn(pmp, fileno) * 1664 dirsperblk; 1665 dirbuf.d_type = DT_DIR; 1666 } else { 1667 fileno = (uint64_t)offset / sizeof(struct direntry); 1668 dirbuf.d_type = DT_REG; 1669 } 1670 #ifdef MSDOSFS_LARGE 1671 dirbuf.d_fileno = msdosfs_fileno_map(pmp->pm_mountp, 1672 fileno); 1673 #else 1674 dirbuf.d_fileno = (uint32_t)fileno; 1675 #endif 1676 if (chksum != winChksum(dentp->deName)) { 1677 dirbuf.d_namlen = dos2unixfn(dentp->deName, 1678 (u_char *)dirbuf.d_name, 1679 dentp->deLowerCase | 1680 ((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ? 1681 (LCASE_BASE | LCASE_EXT) : 0), 1682 pmp); 1683 mbnambuf_init(); 1684 } else 1685 mbnambuf_flush(&dirbuf); 1686 chksum = -1; 1687 dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf); 1688 if (uio->uio_resid < dirbuf.d_reclen) { 1689 brelse(bp); 1690 goto out; 1691 } 1692 error = uiomove(&dirbuf, dirbuf.d_reclen, uio); 1693 if (error) { 1694 brelse(bp); 1695 goto out; 1696 } 1697 if (cookies) { 1698 *cookies++ = offset + sizeof(struct direntry); 1699 if (--ncookies <= 0) { 1700 brelse(bp); 1701 goto out; 1702 } 1703 } 1704 off = offset + sizeof(struct direntry); 1705 } 1706 brelse(bp); 1707 } 1708 out: 1709 /* Subtract unused cookies */ 1710 if (ap->a_ncookies) 1711 *ap->a_ncookies -= ncookies; 1712 1713 uio->uio_offset = off; 1714 1715 /* 1716 * Set the eofflag (NFS uses it) 1717 */ 1718 if (ap->a_eofflag) { 1719 if (dep->de_FileSize - (offset - bias) <= 0) 1720 *ap->a_eofflag = 1; 1721 else 1722 *ap->a_eofflag = 0; 1723 } 1724 return (error); 1725 } 1726 1727 /* 1728 * vp - address of vnode file the file 1729 * bn - which cluster we are interested in mapping to a filesystem block number. 1730 * vpp - returns the vnode for the block special file holding the filesystem 1731 * containing the file of interest 1732 * bnp - address of where to return the filesystem relative block number 1733 */ 1734 static int 1735 msdosfs_bmap(ap) 1736 struct vop_bmap_args /* { 1737 struct vnode *a_vp; 1738 daddr_t a_bn; 1739 struct vnode **a_vpp; 1740 daddr_t *a_bnp; 1741 int *a_runp; 1742 int *a_runb; 1743 } */ *ap; 1744 { 1745 struct denode *dep = VTODE(ap->a_vp); 1746 daddr_t blkno; 1747 int error; 1748 1749 if (ap->a_vpp != NULL) 1750 *ap->a_vpp = dep->de_devvp; 1751 if (ap->a_bnp == NULL) 1752 return (0); 1753 if (ap->a_runp) { 1754 /* 1755 * Sequential clusters should be counted here. 1756 */ 1757 *ap->a_runp = 0; 1758 } 1759 if (ap->a_runb) { 1760 *ap->a_runb = 0; 1761 } 1762 error = pcbmap(dep, ap->a_bn, &blkno, 0, 0); 1763 *ap->a_bnp = blkno; 1764 return (error); 1765 } 1766 1767 static int 1768 msdosfs_strategy(ap) 1769 struct vop_strategy_args /* { 1770 struct vnode *a_vp; 1771 struct buf *a_bp; 1772 } */ *ap; 1773 { 1774 struct buf *bp = ap->a_bp; 1775 struct denode *dep = VTODE(bp->b_vp); 1776 struct vnode *vp; 1777 int error = 0; 1778 daddr_t blkno; 1779 1780 KASSERT(ap->a_vp == ap->a_bp->b_vp, ("%s(%p != %p)", 1781 __func__, ap->a_vp, ap->a_bp->b_vp)); 1782 if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR) 1783 panic("msdosfs_strategy: spec"); 1784 /* 1785 * If we don't already know the filesystem relative block number 1786 * then get it using pcbmap(). If pcbmap() returns the block 1787 * number as -1 then we've got a hole in the file. DOS filesystems 1788 * don't allow files with holes, so we shouldn't ever see this. 1789 */ 1790 if (bp->b_blkno == bp->b_lblkno) { 1791 error = pcbmap(dep, bp->b_lblkno, &blkno, 0, 0); 1792 bp->b_blkno = blkno; 1793 if (error) { 1794 bp->b_error = error; 1795 bp->b_ioflags |= BIO_ERROR; 1796 bufdone(bp); 1797 return (error); 1798 } 1799 if ((long)bp->b_blkno == -1) 1800 vfs_bio_clrbuf(bp); 1801 } 1802 if (bp->b_blkno == -1) { 1803 bufdone(bp); 1804 return (0); 1805 } 1806 /* 1807 * Read/write the block from/to the disk that contains the desired 1808 * file block. 1809 */ 1810 vp = dep->de_devvp; 1811 bp->b_dev = vp->v_rdev; 1812 bp->b_iooffset = dbtob(bp->b_blkno); 1813 VOP_SPECSTRATEGY(vp, bp); 1814 return (0); 1815 } 1816 1817 static int 1818 msdosfs_print(ap) 1819 struct vop_print_args /* { 1820 struct vnode *vp; 1821 } */ *ap; 1822 { 1823 struct denode *dep = VTODE(ap->a_vp); 1824 1825 printf("\tstartcluster %lu, dircluster %lu, diroffset %lu, ", 1826 dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset); 1827 printf("on dev (%d, %d)\n", major(dep->de_dev), minor(dep->de_dev)); 1828 return (0); 1829 } 1830 1831 static int 1832 msdosfs_pathconf(ap) 1833 struct vop_pathconf_args /* { 1834 struct vnode *a_vp; 1835 int a_name; 1836 int *a_retval; 1837 } */ *ap; 1838 { 1839 struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp; 1840 1841 switch (ap->a_name) { 1842 case _PC_LINK_MAX: 1843 *ap->a_retval = 1; 1844 return (0); 1845 case _PC_NAME_MAX: 1846 *ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12; 1847 return (0); 1848 case _PC_PATH_MAX: 1849 *ap->a_retval = PATH_MAX; 1850 return (0); 1851 case _PC_CHOWN_RESTRICTED: 1852 *ap->a_retval = 1; 1853 return (0); 1854 case _PC_NO_TRUNC: 1855 *ap->a_retval = 0; 1856 return (0); 1857 default: 1858 return (EINVAL); 1859 } 1860 /* NOTREACHED */ 1861 } 1862 1863 static int 1864 msdosfs_advlock(ap) 1865 struct vop_advlock_args /* { 1866 struct vnode *a_vp; 1867 u_char a_id; 1868 int a_op; 1869 struct flock *a_fl; 1870 int a_flags; 1871 } */ *ap; 1872 { 1873 struct denode *dep = VTODE(ap->a_vp); 1874 1875 return (lf_advlock(ap, &dep->de_lockf, dep->de_FileSize)); 1876 } 1877 1878 /* Global vfs data structures for msdosfs */ 1879 vop_t **msdosfs_vnodeop_p; 1880 static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = { 1881 { &vop_default_desc, (vop_t *) vop_defaultop }, 1882 { &vop_access_desc, (vop_t *) msdosfs_access }, 1883 { &vop_advlock_desc, (vop_t *) msdosfs_advlock }, 1884 { &vop_bmap_desc, (vop_t *) msdosfs_bmap }, 1885 { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup }, 1886 { &vop_close_desc, (vop_t *) msdosfs_close }, 1887 { &vop_create_desc, (vop_t *) msdosfs_create }, 1888 { &vop_fsync_desc, (vop_t *) msdosfs_fsync }, 1889 { &vop_getattr_desc, (vop_t *) msdosfs_getattr }, 1890 { &vop_inactive_desc, (vop_t *) msdosfs_inactive }, 1891 { &vop_link_desc, (vop_t *) msdosfs_link }, 1892 { &vop_lookup_desc, (vop_t *) vfs_cache_lookup }, 1893 { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir }, 1894 { &vop_mknod_desc, (vop_t *) msdosfs_mknod }, 1895 { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf }, 1896 { &vop_print_desc, (vop_t *) msdosfs_print }, 1897 { &vop_read_desc, (vop_t *) msdosfs_read }, 1898 { &vop_readdir_desc, (vop_t *) msdosfs_readdir }, 1899 { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim }, 1900 { &vop_remove_desc, (vop_t *) msdosfs_remove }, 1901 { &vop_rename_desc, (vop_t *) msdosfs_rename }, 1902 { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir }, 1903 { &vop_setattr_desc, (vop_t *) msdosfs_setattr }, 1904 { &vop_strategy_desc, (vop_t *) msdosfs_strategy }, 1905 { &vop_symlink_desc, (vop_t *) msdosfs_symlink }, 1906 { &vop_write_desc, (vop_t *) msdosfs_write }, 1907 { NULL, NULL } 1908 }; 1909 static struct vnodeopv_desc msdosfs_vnodeop_opv_desc = 1910 { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries }; 1911 1912 VNODEOP_SET(msdosfs_vnodeop_opv_desc);
Cache object: c2fccfb3ecbd72640f9140fb8f5913c7
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]