1 /*- 2 * Copyright (c) 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley 6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 7 * Support code is derived from software contributed to Berkeley 8 * by Atsushi Murai (amurai@spec.co.jp). 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 the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)cd9660_vnops.c 8.19 (Berkeley) 5/27/95 39 * $FreeBSD: src/sys/isofs/cd9660/cd9660_vnops.c,v 1.62 1999/12/15 23:01:51 eivind Exp $ 40 * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vnops.c,v 1.36 2007/08/13 17:31:56 dillon Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/proc.h> 46 #include <sys/namei.h> 47 #include <sys/kernel.h> 48 #include <sys/stat.h> 49 #include <sys/buf.h> 50 #include <sys/mount.h> 51 #include <sys/vnode.h> 52 #include <vfs/fifofs/fifo.h> 53 #include <sys/malloc.h> 54 #include <sys/dirent.h> 55 #include <sys/unistd.h> 56 #include <sys/filio.h> 57 #include <sys/lockf.h> 58 #include <sys/objcache.h> 59 60 #include <vm/vm.h> 61 #include <vm/vnode_pager.h> 62 63 #include "iso.h" 64 #include "cd9660_node.h" 65 #include "iso_rrip.h" 66 67 static int cd9660_access (struct vop_access_args *); 68 static int cd9660_advlock (struct vop_advlock_args *); 69 static int cd9660_getattr (struct vop_getattr_args *); 70 static int cd9660_ioctl (struct vop_ioctl_args *); 71 static int cd9660_pathconf (struct vop_pathconf_args *); 72 static int cd9660_open (struct vop_open_args *); 73 static int cd9660_read (struct vop_read_args *); 74 static int cd9660_setattr (struct vop_setattr_args *); 75 struct isoreaddir; 76 static int iso_uiodir (struct isoreaddir *idp, struct dirent *dp, 77 off_t off); 78 static int iso_shipdir (struct isoreaddir *idp); 79 static int cd9660_readdir (struct vop_readdir_args *); 80 static int cd9660_readlink (struct vop_readlink_args *ap); 81 static int cd9660_strategy (struct vop_strategy_args *); 82 static int cd9660_print (struct vop_print_args *); 83 static int cd9660_getpages (struct vop_getpages_args *); 84 static int cd9660_putpages (struct vop_putpages_args *); 85 86 /* 87 * Setattr call. Only allowed for block and character special devices. 88 * 89 * cd9660_setattr(struct vnode *a_vp, struct vattr *a_vap, 90 * struct ucred *a_cred, struct proc *a_p) 91 */ 92 int 93 cd9660_setattr(struct vop_setattr_args *ap) 94 { 95 struct vnode *vp = ap->a_vp; 96 struct vattr *vap = ap->a_vap; 97 98 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 99 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 100 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 101 return (EROFS); 102 if (vap->va_size != (u_quad_t)VNOVAL) { 103 switch (vp->v_type) { 104 case VDIR: 105 return (EISDIR); 106 case VLNK: 107 case VREG: 108 return (EROFS); 109 case VCHR: 110 case VBLK: 111 case VSOCK: 112 case VFIFO: 113 case VNON: 114 case VBAD: 115 return (0); 116 } 117 } 118 return (0); 119 } 120 121 /* 122 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 123 * The mode is shifted to select the owner/group/other fields. The 124 * super user is granted all permissions. 125 * 126 * cd9660_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 127 * struct proc *a_p) 128 */ 129 /* ARGSUSED */ 130 static int 131 cd9660_access(struct vop_access_args *ap) 132 { 133 struct vnode *vp = ap->a_vp; 134 struct iso_node *ip = VTOI(vp); 135 struct ucred *cred = ap->a_cred; 136 mode_t mask, mode = ap->a_mode; 137 gid_t *gp; 138 int i; 139 140 /* 141 * Disallow write attempts unless the file is a socket, 142 * fifo, or a block or character device resident on the 143 * file system. 144 */ 145 if (mode & VWRITE) { 146 switch (vp->v_type) { 147 case VDIR: 148 case VLNK: 149 case VREG: 150 return (EROFS); 151 /* NOT REACHED */ 152 default: 153 break; 154 } 155 } 156 157 /* User id 0 always gets access. */ 158 if (cred->cr_uid == 0) 159 return (0); 160 161 mask = 0; 162 163 /* Otherwise, check the owner. */ 164 if (cred->cr_uid == ip->inode.iso_uid) { 165 if (mode & VEXEC) 166 mask |= S_IXUSR; 167 if (mode & VREAD) 168 mask |= S_IRUSR; 169 if (mode & VWRITE) 170 mask |= S_IWUSR; 171 return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES); 172 } 173 174 /* Otherwise, check the groups. */ 175 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 176 if (ip->inode.iso_gid == *gp) { 177 if (mode & VEXEC) 178 mask |= S_IXGRP; 179 if (mode & VREAD) 180 mask |= S_IRGRP; 181 if (mode & VWRITE) 182 mask |= S_IWGRP; 183 return ((ip->inode.iso_mode & mask) == mask ? 184 0 : EACCES); 185 } 186 187 /* Otherwise, check everyone else. */ 188 if (mode & VEXEC) 189 mask |= S_IXOTH; 190 if (mode & VREAD) 191 mask |= S_IROTH; 192 if (mode & VWRITE) 193 mask |= S_IWOTH; 194 return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES); 195 } 196 197 /* 198 * cd9660_getattr(struct vnode *a_vp, struct vattr *a_vap) 199 */ 200 static int 201 cd9660_getattr(struct vop_getattr_args *ap) 202 { 203 struct vnode *vp = ap->a_vp; 204 struct vattr *vap = ap->a_vap; 205 struct iso_node *ip = VTOI(vp); 206 207 vap->va_fsid = dev2udev(ip->i_dev); 208 vap->va_fileid = ip->i_number; 209 210 vap->va_mode = ip->inode.iso_mode; 211 vap->va_nlink = ip->inode.iso_links; 212 vap->va_uid = ip->inode.iso_uid; 213 vap->va_gid = ip->inode.iso_gid; 214 vap->va_atime = ip->inode.iso_atime; 215 vap->va_mtime = ip->inode.iso_mtime; 216 vap->va_ctime = ip->inode.iso_ctime; 217 vap->va_rmajor = umajor(ip->inode.iso_rdev); 218 vap->va_rminor = uminor(ip->inode.iso_rdev); 219 220 vap->va_size = (u_quad_t)(unsigned long)ip->i_size; 221 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 222 struct vop_readlink_args rdlnk; 223 struct iovec aiov; 224 struct uio auio; 225 char *cp; 226 227 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 228 aiov.iov_base = cp; 229 aiov.iov_len = MAXPATHLEN; 230 auio.uio_iov = &aiov; 231 auio.uio_iovcnt = 1; 232 auio.uio_offset = 0; 233 auio.uio_rw = UIO_READ; 234 auio.uio_segflg = UIO_SYSSPACE; 235 auio.uio_td = curthread; 236 auio.uio_resid = MAXPATHLEN; 237 rdlnk.a_uio = &auio; 238 rdlnk.a_vp = ap->a_vp; 239 rdlnk.a_cred = proc0.p_ucred; /* use root cred */ 240 if (cd9660_readlink(&rdlnk) == 0) 241 vap->va_size = MAXPATHLEN - auio.uio_resid; 242 FREE(cp, M_TEMP); 243 } 244 vap->va_flags = 0; 245 vap->va_gen = 1; 246 vap->va_blocksize = ip->i_mnt->logical_block_size; 247 vap->va_bytes = (u_quad_t) ip->i_size; 248 vap->va_type = vp->v_type; 249 vap->va_filerev = 0; 250 return (0); 251 } 252 253 /* 254 * Vnode op for ioctl. 255 * 256 * cd9660_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data, 257 * int a_fflag, struct ucred *a_cred, struct proc *a_p) 258 */ 259 static int 260 cd9660_ioctl(struct vop_ioctl_args *ap) 261 { 262 struct vnode *vp = ap->a_vp; 263 struct iso_node *ip = VTOI(vp); 264 265 switch (ap->a_command) { 266 267 case FIOGETLBA: 268 *(int *)(ap->a_data) = ip->iso_start; 269 return 0; 270 default: 271 return (ENOTTY); 272 } 273 } 274 275 /* 276 * open is called when the kernel intends to read or memory map a vnode. 277 */ 278 static int 279 cd9660_open(struct vop_open_args *ap) 280 { 281 return(vop_stdopen(ap)); 282 } 283 284 /* 285 * Vnode op for reading. 286 * 287 * cd9660_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 288 * struct ucred *a_cred) 289 */ 290 static int 291 cd9660_read(struct vop_read_args *ap) 292 { 293 struct vnode *vp = ap->a_vp; 294 struct uio *uio = ap->a_uio; 295 struct iso_node *ip = VTOI(vp); 296 struct iso_mnt *imp; 297 struct buf *bp; 298 daddr_t lbn, rablock; 299 off_t raoffset; 300 off_t loffset; 301 off_t diff; 302 int rasize, error = 0; 303 int seqcount; 304 long size, n, on; 305 306 seqcount = ap->a_ioflag >> 16; 307 308 if (uio->uio_resid == 0) 309 return (0); 310 if (uio->uio_offset < 0) 311 return (EINVAL); 312 ip->i_flag |= IN_ACCESS; 313 imp = ip->i_mnt; 314 do { 315 lbn = lblkno(imp, uio->uio_offset); 316 loffset = lblktooff(imp, lbn); 317 on = blkoff(imp, uio->uio_offset); 318 n = min((u_int)(imp->logical_block_size - on), 319 uio->uio_resid); 320 diff = (off_t)ip->i_size - uio->uio_offset; 321 if (diff <= 0) 322 return (0); 323 if (diff < n) 324 n = diff; 325 size = blksize(imp, ip, lbn); 326 rablock = lbn + 1; 327 raoffset = lblktooff(imp, rablock); 328 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 329 if (raoffset < ip->i_size) 330 error = cluster_read(vp, (off_t)ip->i_size, 331 loffset, size, 332 uio->uio_resid, 333 (ap->a_ioflag >> 16), &bp); 334 else 335 error = bread(vp, loffset, size, &bp); 336 } else { 337 if (seqcount > 1 && 338 lblktosize(imp, rablock) < ip->i_size) { 339 rasize = blksize(imp, ip, rablock); 340 error = breadn(vp, loffset, size, &raoffset, 341 &rasize, 1, &bp); 342 } else 343 error = bread(vp, loffset, size, &bp); 344 } 345 n = min(n, size - bp->b_resid); 346 if (error) { 347 brelse(bp); 348 return (error); 349 } 350 351 error = uiomove(bp->b_data + on, (int)n, uio); 352 brelse(bp); 353 } while (error == 0 && uio->uio_resid > 0 && n != 0); 354 return (error); 355 } 356 357 /* struct dirent + enough space for the maximum supported size */ 358 struct iso_dirent { 359 struct dirent de; 360 char de_name[_DIRENT_RECLEN(NAME_MAX) - sizeof(struct dirent)]; 361 }; 362 363 /* 364 * Structure for reading directories 365 */ 366 struct isoreaddir { 367 struct iso_dirent saveent; 368 struct iso_dirent assocent; 369 struct iso_dirent current; 370 off_t saveoff; 371 off_t assocoff; 372 off_t curroff; 373 struct uio *uio; 374 off_t uio_off; 375 int eofflag; 376 u_long *cookies; 377 int ncookies; 378 }; 379 380 int 381 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 382 { 383 int error; 384 385 dp->d_name[dp->d_namlen] = 0; 386 387 if (idp->uio->uio_resid < _DIRENT_DIRSIZ(dp)) { 388 idp->eofflag = 0; 389 return (-1); 390 } 391 392 if (idp->cookies) { 393 if (idp->ncookies <= 0) { 394 idp->eofflag = 0; 395 return (-1); 396 } 397 398 *idp->cookies++ = off; 399 --idp->ncookies; 400 } 401 402 if ((error = uiomove((caddr_t) dp,_DIRENT_DIRSIZ(dp),idp->uio)) != 0) 403 return (error); 404 idp->uio_off = off; 405 return (0); 406 } 407 408 int 409 iso_shipdir(struct isoreaddir *idp) 410 { 411 struct dirent *dp; 412 int cl, sl, assoc; 413 int error; 414 char *cname, *sname; 415 416 cl = idp->current.de.d_namlen; 417 cname = idp->current.de.d_name; 418 assoc = (cl > 1) && (*cname == ASSOCCHAR); 419 if (assoc) { 420 cl--; 421 cname++; 422 } 423 424 dp = &idp->saveent.de; 425 sname = dp->d_name; 426 if (!(sl = dp->d_namlen)) { 427 dp = &idp->assocent.de; 428 sname = dp->d_name + 1; 429 sl = dp->d_namlen - 1; 430 } 431 if (sl > 0) { 432 if (sl != cl 433 || bcmp(sname,cname,sl)) { 434 if (idp->assocent.de.d_namlen) { 435 if ((error = iso_uiodir(idp,&idp->assocent.de,idp->assocoff)) != 0) 436 return (error); 437 idp->assocent.de.d_namlen = 0; 438 } 439 if (idp->saveent.de.d_namlen) { 440 if ((error = iso_uiodir(idp,&idp->saveent.de,idp->saveoff)) != 0) 441 return (error); 442 idp->saveent.de.d_namlen = 0; 443 } 444 } 445 } 446 if (assoc) { 447 idp->assocoff = idp->curroff; 448 bcopy(&idp->current,&idp->assocent,_DIRENT_DIRSIZ(&idp->current.de)); 449 } else { 450 idp->saveoff = idp->curroff; 451 bcopy(&idp->current,&idp->saveent,_DIRENT_DIRSIZ(&idp->current.de)); 452 } 453 return (0); 454 } 455 456 /* 457 * Vnode op for readdir 458 * 459 * cd9660_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, 460 * int *a_eofflag, int *a_ncookies, u_long *a_cookies) 461 */ 462 static int 463 cd9660_readdir(struct vop_readdir_args *ap) 464 { 465 struct uio *uio = ap->a_uio; 466 struct isoreaddir *idp; 467 struct vnode *vdp = ap->a_vp; 468 struct iso_node *dp; 469 struct iso_mnt *imp; 470 struct buf *bp = NULL; 471 struct iso_directory_record *ep; 472 int entryoffsetinblock; 473 doff_t endsearch; 474 u_long bmask; 475 int error = 0; 476 int reclen; 477 u_short namelen; 478 int ncookies = 0; 479 u_long *cookies = NULL; 480 481 dp = VTOI(vdp); 482 imp = dp->i_mnt; 483 bmask = imp->im_bmask; 484 485 if ((error = vn_lock(vdp, LK_EXCLUSIVE|LK_RETRY)) != 0) 486 return (error); 487 488 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK); 489 idp->saveent.de.d_namlen = idp->assocent.de.d_namlen = 0; 490 /* 491 * XXX 492 * Is it worth trying to figure out the type? 493 */ 494 idp->saveent.de.d_type = DT_UNKNOWN; 495 idp->assocent.de.d_type = DT_UNKNOWN; 496 idp->current.de.d_type = DT_UNKNOWN; 497 idp->uio = uio; 498 if (ap->a_ncookies == NULL) { 499 idp->cookies = NULL; 500 } else { 501 /* 502 * Guess the number of cookies needed. Guess at least 503 * 1 to avoid a degenerate case in malloc, and cap at 504 * a reasonable limit. 505 */ 506 ncookies = uio->uio_resid / 16 + 1; 507 if (ncookies > 1024) 508 ncookies = 1024; 509 MALLOC(cookies, u_long *, ncookies * sizeof(u_int), 510 M_TEMP, M_WAITOK); 511 idp->cookies = cookies; 512 idp->ncookies = ncookies; 513 } 514 idp->eofflag = 1; 515 idp->curroff = uio->uio_offset; 516 517 if ((entryoffsetinblock = idp->curroff & bmask) && 518 (error = cd9660_devblkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 519 FREE(idp, M_TEMP); 520 goto done; 521 } 522 endsearch = dp->i_size; 523 524 while (idp->curroff < endsearch) { 525 /* 526 * If offset is on a block boundary, 527 * read the next directory block. 528 * Release previous if it exists. 529 */ 530 if ((idp->curroff & bmask) == 0) { 531 if (bp != NULL) 532 brelse(bp); 533 if ((error = 534 cd9660_devblkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 535 break; 536 entryoffsetinblock = 0; 537 } 538 /* 539 * Get pointer to next entry. 540 */ 541 ep = (struct iso_directory_record *) 542 ((char *)bp->b_data + entryoffsetinblock); 543 544 reclen = isonum_711(ep->length); 545 if (reclen == 0) { 546 /* skip to next block, if any */ 547 idp->curroff = 548 (idp->curroff & ~bmask) + imp->logical_block_size; 549 continue; 550 } 551 552 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 553 error = EINVAL; 554 /* illegal entry, stop */ 555 break; 556 } 557 558 if (entryoffsetinblock + reclen > imp->logical_block_size) { 559 error = EINVAL; 560 /* illegal directory, so stop looking */ 561 break; 562 } 563 564 idp->current.de.d_namlen = isonum_711(ep->name_len); 565 566 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.de.d_namlen) { 567 error = EINVAL; 568 /* illegal entry, stop */ 569 break; 570 } 571 572 if (isonum_711(ep->flags)&2) 573 idp->current.de.d_ino = isodirino(ep, imp); 574 else 575 idp->current.de.d_ino = bp->b_bio1.bio_offset + 576 entryoffsetinblock; 577 578 idp->curroff += reclen; 579 580 switch (imp->iso_ftype) { 581 case ISO_FTYPE_RRIP: 582 { 583 ino_t cur_fileno = idp->current.de.d_ino; 584 cd9660_rrip_getname(ep,idp->current.de.d_name, &namelen, 585 &cur_fileno,imp); 586 idp->current.de.d_ino = cur_fileno; 587 idp->current.de.d_namlen = namelen; 588 if (idp->current.de.d_namlen) 589 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 590 break; 591 } 592 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 593 strcpy(idp->current.de.d_name,".."); 594 if (idp->current.de.d_namlen == 1 && ep->name[0] == 0) { 595 idp->current.de.d_namlen = 1; 596 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 597 } else if (idp->current.de.d_namlen == 1 && ep->name[0] == 1) { 598 idp->current.de.d_namlen = 2; 599 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 600 } else { 601 isofntrans(ep->name,idp->current.de.d_namlen, 602 idp->current.de.d_name, &namelen, 603 imp->iso_ftype == ISO_FTYPE_9660, 604 isonum_711(ep->flags)&4, 605 imp->joliet_level); 606 idp->current.de.d_namlen = namelen; 607 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 608 error = iso_shipdir(idp); 609 else 610 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 611 } 612 } 613 if (error) 614 break; 615 616 entryoffsetinblock += reclen; 617 } 618 619 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 620 idp->current.de.d_namlen = 0; 621 error = iso_shipdir(idp); 622 } 623 if (error < 0) 624 error = 0; 625 626 if (ap->a_ncookies != NULL) { 627 if (error) 628 kfree(cookies, M_TEMP); 629 else { 630 /* 631 * Work out the number of cookies actually used. 632 */ 633 *ap->a_ncookies = ncookies - idp->ncookies; 634 *ap->a_cookies = cookies; 635 } 636 } 637 638 if (bp) 639 brelse (bp); 640 641 uio->uio_offset = idp->uio_off; 642 *ap->a_eofflag = idp->eofflag; 643 644 FREE(idp, M_TEMP); 645 646 done: 647 vn_unlock(vdp); 648 return (error); 649 } 650 651 /* 652 * Return target name of a symbolic link 653 * Shouldn't we get the parent vnode and read the data from there? 654 * This could eventually result in deadlocks in cd9660_lookup. 655 * But otherwise the block read here is in the block buffer two times. 656 */ 657 typedef struct iso_directory_record ISODIR; 658 typedef struct iso_node ISONODE; 659 typedef struct iso_mnt ISOMNT; 660 /* 661 * cd9660_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 662 */ 663 static int 664 cd9660_readlink(struct vop_readlink_args *ap) 665 { 666 ISONODE *ip; 667 ISODIR *dirp; 668 ISOMNT *imp; 669 struct buf *bp; 670 struct uio *uio; 671 u_short symlen; 672 int error; 673 char *symname; 674 675 ip = VTOI(ap->a_vp); 676 imp = ip->i_mnt; 677 uio = ap->a_uio; 678 679 if (imp->iso_ftype != ISO_FTYPE_RRIP) 680 return (EINVAL); 681 682 /* 683 * Get parents directory record block that this inode included. 684 */ 685 error = bread(imp->im_devvp, 686 (off_t)ip->i_number & ~((1 << imp->im_bshift) - 1), 687 imp->logical_block_size, &bp); 688 if (error) { 689 brelse(bp); 690 return (EINVAL); 691 } 692 693 /* 694 * Setup the directory pointer for this inode 695 */ 696 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 697 698 /* 699 * Just make sure, we have a right one.... 700 * 1: Check not cross boundary on block 701 */ 702 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 703 > (unsigned)imp->logical_block_size) { 704 brelse(bp); 705 return (EINVAL); 706 } 707 708 /* 709 * Now get a buffer 710 * Abuse a namei buffer for now. 711 */ 712 if (uio->uio_segflg == UIO_SYSSPACE) 713 symname = uio->uio_iov->iov_base; 714 else 715 symname = objcache_get(namei_oc, M_WAITOK); 716 717 /* 718 * Ok, we just gathering a symbolic name in SL record. 719 */ 720 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 721 if (uio->uio_segflg != UIO_SYSSPACE) 722 objcache_put(namei_oc, symname); 723 brelse(bp); 724 return (EINVAL); 725 } 726 /* 727 * Don't forget before you leave from home ;-) 728 */ 729 brelse(bp); 730 731 /* 732 * return with the symbolic name to caller's. 733 */ 734 if (uio->uio_segflg != UIO_SYSSPACE) { 735 error = uiomove(symname, symlen, uio); 736 objcache_put(namei_oc, symname); 737 return (error); 738 } 739 uio->uio_resid -= symlen; 740 uio->uio_iov->iov_base += symlen; 741 uio->uio_iov->iov_len -= symlen; 742 return (0); 743 } 744 745 /* 746 * Calculate the logical to physical mapping if not done already, 747 * then call the device strategy routine. 748 * 749 * cd9660_strategy(struct buf *a_vp, struct buf *a_bio) 750 */ 751 static int 752 cd9660_strategy(struct vop_strategy_args *ap) 753 { 754 struct bio *bio = ap->a_bio; 755 struct bio *nbio; 756 struct buf *bp = bio->bio_buf; 757 struct vnode *vp = ap->a_vp; 758 struct iso_node *ip; 759 int error; 760 761 ip = VTOI(vp); 762 if (vp->v_type == VBLK || vp->v_type == VCHR) 763 panic("cd9660_strategy: spec"); 764 nbio = push_bio(bio); 765 if (nbio->bio_offset == NOOFFSET) { 766 error = VOP_BMAP(vp, bio->bio_offset, 767 &nbio->bio_offset, NULL, NULL); 768 if (error) { 769 bp->b_error = error; 770 bp->b_flags |= B_ERROR; 771 /* I/O was never started on nbio, must biodone(bio) */ 772 biodone(bio); 773 return (error); 774 } 775 if (nbio->bio_offset == NOOFFSET) 776 clrbuf(bp); 777 } 778 if (nbio->bio_offset == NOOFFSET) { 779 /* I/O was never started on nbio, must biodone(bio) */ 780 biodone(bio); 781 return (0); 782 } 783 vp = ip->i_devvp; 784 vn_strategy(vp, nbio); 785 return (0); 786 } 787 788 /* 789 * Print out the contents of an inode. 790 * 791 * cd9660_print(struct vnode *a_vp) 792 */ 793 static int 794 cd9660_print(struct vop_print_args *ap) 795 { 796 kprintf("tag VT_ISOFS, isofs vnode\n"); 797 return (0); 798 } 799 800 /* 801 * Return POSIX pathconf information applicable to cd9660 filesystems. 802 * 803 * cd9660_pathconf(struct vnode *a_vp, int a_name, register_t *a_retval) 804 */ 805 static int 806 cd9660_pathconf(struct vop_pathconf_args *ap) 807 { 808 switch (ap->a_name) { 809 case _PC_LINK_MAX: 810 *ap->a_retval = 1; 811 return (0); 812 case _PC_NAME_MAX: 813 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 814 *ap->a_retval = NAME_MAX; 815 else 816 *ap->a_retval = 37; 817 return (0); 818 case _PC_PATH_MAX: 819 *ap->a_retval = PATH_MAX; 820 return (0); 821 case _PC_PIPE_BUF: 822 *ap->a_retval = PIPE_BUF; 823 return (0); 824 case _PC_CHOWN_RESTRICTED: 825 *ap->a_retval = 1; 826 return (0); 827 case _PC_NO_TRUNC: 828 *ap->a_retval = 1; 829 return (0); 830 default: 831 return (EINVAL); 832 } 833 /* NOTREACHED */ 834 } 835 836 /* 837 * get page routine 838 * 839 * XXX By default, wimp out... note that a_offset is ignored (and always 840 * XXX has been). 841 */ 842 int 843 cd9660_getpages(struct vop_getpages_args *ap) 844 { 845 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 846 ap->a_reqpage); 847 } 848 849 /* 850 * put page routine 851 * 852 * XXX By default, wimp out... note that a_offset is ignored (and always 853 * XXX has been). 854 */ 855 int 856 cd9660_putpages(struct vop_putpages_args *ap) 857 { 858 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 859 ap->a_sync, ap->a_rtvals); 860 } 861 862 /* 863 * Advisory lock support 864 */ 865 static int 866 cd9660_advlock(struct vop_advlock_args *ap) 867 { 868 struct iso_node *ip = VTOI(ap->a_vp); 869 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size)); 870 } 871 872 873 /* 874 * Global vfs data structures for cd9660 875 */ 876 struct vop_ops cd9660_vnode_vops = { 877 .vop_default = vop_defaultop, 878 .vop_open = cd9660_open, 879 .vop_access = cd9660_access, 880 .vop_advlock = cd9660_advlock, 881 .vop_bmap = cd9660_bmap, 882 .vop_old_lookup = cd9660_lookup, 883 .vop_getattr = cd9660_getattr, 884 .vop_inactive = cd9660_inactive, 885 .vop_ioctl = cd9660_ioctl, 886 .vop_pathconf = cd9660_pathconf, 887 .vop_print = cd9660_print, 888 .vop_read = cd9660_read, 889 .vop_readdir = cd9660_readdir, 890 .vop_readlink = cd9660_readlink, 891 .vop_reclaim = cd9660_reclaim, 892 .vop_setattr = cd9660_setattr, 893 .vop_strategy = cd9660_strategy, 894 .vop_getpages = cd9660_getpages, 895 .vop_putpages = cd9660_putpages 896 }; 897 898 /* 899 * Special device vnode ops 900 */ 901 struct vop_ops cd9660_spec_vops = { 902 .vop_default = spec_vnoperate, 903 .vop_access = cd9660_access, 904 .vop_getattr = cd9660_getattr, 905 .vop_inactive = cd9660_inactive, 906 .vop_print = cd9660_print, 907 .vop_reclaim = cd9660_reclaim, 908 .vop_setattr = cd9660_setattr, 909 }; 910 911 struct vop_ops cd9660_fifo_vops = { 912 .vop_default = fifo_vnoperate, 913 .vop_access = cd9660_access, 914 .vop_getattr = cd9660_getattr, 915 .vop_inactive = cd9660_inactive, 916 .vop_print = cd9660_print, 917 .vop_reclaim = cd9660_reclaim, 918 .vop_setattr = cd9660_setattr, 919 }; 920 921