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 1.39 2007/11/20 21:03:50 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 84 /* 85 * Setattr call. Only allowed for block and character special devices. 86 * 87 * cd9660_setattr(struct vnode *a_vp, struct vattr *a_vap, 88 * struct ucred *a_cred, struct proc *a_p) 89 */ 90 int 91 cd9660_setattr(struct vop_setattr_args *ap) 92 { 93 struct vnode *vp = ap->a_vp; 94 struct vattr *vap = ap->a_vap; 95 96 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 97 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 98 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 99 return (EROFS); 100 if (vap->va_size != (u_quad_t)VNOVAL) { 101 switch (vp->v_type) { 102 case VDIR: 103 return (EISDIR); 104 case VLNK: 105 case VREG: 106 case VDATABASE: 107 return (EROFS); 108 case VCHR: 109 case VBLK: 110 case VSOCK: 111 case VFIFO: 112 case VNON: 113 case VBAD: 114 return (0); 115 } 116 } 117 return (0); 118 } 119 120 /* 121 * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC. 122 * The mode is shifted to select the owner/group/other fields. The 123 * super user is granted all permissions. 124 * 125 * cd9660_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred, 126 * struct proc *a_p) 127 */ 128 /* ARGSUSED */ 129 static int 130 cd9660_access(struct vop_access_args *ap) 131 { 132 struct vnode *vp = ap->a_vp; 133 struct iso_node *ip = VTOI(vp); 134 struct ucred *cred = ap->a_cred; 135 mode_t mask, mode = ap->a_mode; 136 gid_t *gp; 137 int i; 138 139 /* 140 * Disallow write attempts unless the file is a socket, 141 * fifo, or a block or character device resident on the 142 * file system. 143 */ 144 if (mode & VWRITE) { 145 switch (vp->v_type) { 146 case VDIR: 147 case VLNK: 148 case VREG: 149 return (EROFS); 150 /* NOT REACHED */ 151 default: 152 break; 153 } 154 } 155 156 /* User id 0 always gets access. */ 157 if (cred->cr_uid == 0) 158 return (0); 159 160 mask = 0; 161 162 /* Otherwise, check the owner. */ 163 if (cred->cr_uid == ip->inode.iso_uid) { 164 if (mode & VEXEC) 165 mask |= S_IXUSR; 166 if (mode & VREAD) 167 mask |= S_IRUSR; 168 if (mode & VWRITE) 169 mask |= S_IWUSR; 170 return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES); 171 } 172 173 /* Otherwise, check the groups. */ 174 for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++) 175 if (ip->inode.iso_gid == *gp) { 176 if (mode & VEXEC) 177 mask |= S_IXGRP; 178 if (mode & VREAD) 179 mask |= S_IRGRP; 180 if (mode & VWRITE) 181 mask |= S_IWGRP; 182 return ((ip->inode.iso_mode & mask) == mask ? 183 0 : EACCES); 184 } 185 186 /* Otherwise, check everyone else. */ 187 if (mode & VEXEC) 188 mask |= S_IXOTH; 189 if (mode & VREAD) 190 mask |= S_IROTH; 191 if (mode & VWRITE) 192 mask |= S_IWOTH; 193 return ((ip->inode.iso_mode & mask) == mask ? 0 : EACCES); 194 } 195 196 /* 197 * cd9660_getattr(struct vnode *a_vp, struct vattr *a_vap) 198 */ 199 static int 200 cd9660_getattr(struct vop_getattr_args *ap) 201 { 202 struct vnode *vp = ap->a_vp; 203 struct vattr *vap = ap->a_vap; 204 struct iso_node *ip = VTOI(vp); 205 206 vap->va_fsid = dev2udev(ip->i_dev); 207 vap->va_fileid = ip->i_number; 208 209 vap->va_mode = ip->inode.iso_mode; 210 vap->va_nlink = ip->inode.iso_links; 211 vap->va_uid = ip->inode.iso_uid; 212 vap->va_gid = ip->inode.iso_gid; 213 vap->va_atime = ip->inode.iso_atime; 214 vap->va_mtime = ip->inode.iso_mtime; 215 vap->va_ctime = ip->inode.iso_ctime; 216 vap->va_rmajor = umajor(ip->inode.iso_rdev); 217 vap->va_rminor = uminor(ip->inode.iso_rdev); 218 219 vap->va_size = (u_quad_t)(unsigned long)ip->i_size; 220 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 221 struct vop_readlink_args rdlnk; 222 struct iovec aiov; 223 struct uio auio; 224 char *cp; 225 226 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 227 aiov.iov_base = cp; 228 aiov.iov_len = MAXPATHLEN; 229 auio.uio_iov = &aiov; 230 auio.uio_iovcnt = 1; 231 auio.uio_offset = 0; 232 auio.uio_rw = UIO_READ; 233 auio.uio_segflg = UIO_SYSSPACE; 234 auio.uio_td = curthread; 235 auio.uio_resid = MAXPATHLEN; 236 rdlnk.a_uio = &auio; 237 rdlnk.a_vp = ap->a_vp; 238 rdlnk.a_cred = proc0.p_ucred; /* use root cred */ 239 if (cd9660_readlink(&rdlnk) == 0) 240 vap->va_size = MAXPATHLEN - auio.uio_resid; 241 FREE(cp, M_TEMP); 242 } 243 vap->va_flags = 0; 244 vap->va_gen = 1; 245 vap->va_blocksize = ip->i_mnt->logical_block_size; 246 vap->va_bytes = (u_quad_t) ip->i_size; 247 vap->va_type = vp->v_type; 248 vap->va_filerev = 0; 249 return (0); 250 } 251 252 /* 253 * Vnode op for ioctl. 254 * 255 * cd9660_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data, 256 * int a_fflag, struct ucred *a_cred, struct proc *a_p) 257 */ 258 static int 259 cd9660_ioctl(struct vop_ioctl_args *ap) 260 { 261 struct vnode *vp = ap->a_vp; 262 struct iso_node *ip = VTOI(vp); 263 264 switch (ap->a_command) { 265 266 case FIOGETLBA: 267 *(int *)(ap->a_data) = ip->iso_start; 268 return 0; 269 default: 270 return (ENOTTY); 271 } 272 } 273 274 /* 275 * open is called when the kernel intends to read or memory map a vnode. 276 */ 277 static int 278 cd9660_open(struct vop_open_args *ap) 279 { 280 return(vop_stdopen(ap)); 281 } 282 283 /* 284 * Vnode op for reading. 285 * 286 * cd9660_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 287 * struct ucred *a_cred) 288 */ 289 static int 290 cd9660_read(struct vop_read_args *ap) 291 { 292 struct vnode *vp = ap->a_vp; 293 struct uio *uio = ap->a_uio; 294 struct iso_node *ip = VTOI(vp); 295 struct iso_mnt *imp; 296 struct buf *bp; 297 daddr_t lbn, rablock; 298 off_t raoffset; 299 off_t loffset; 300 off_t diff; 301 int rasize, error = 0; 302 int seqcount; 303 long size, n, on; 304 305 seqcount = ap->a_ioflag >> 16; 306 307 if (uio->uio_resid == 0) 308 return (0); 309 if (uio->uio_offset < 0) 310 return (EINVAL); 311 ip->i_flag |= IN_ACCESS; 312 imp = ip->i_mnt; 313 do { 314 lbn = lblkno(imp, uio->uio_offset); 315 loffset = lblktooff(imp, lbn); 316 on = blkoff(imp, uio->uio_offset); 317 n = min((u_int)(imp->logical_block_size - on), 318 uio->uio_resid); 319 diff = (off_t)ip->i_size - uio->uio_offset; 320 if (diff <= 0) 321 return (0); 322 if (diff < n) 323 n = diff; 324 size = blksize(imp, ip, lbn); 325 rablock = lbn + 1; 326 raoffset = lblktooff(imp, rablock); 327 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 328 if (raoffset < ip->i_size) 329 error = cluster_read(vp, (off_t)ip->i_size, 330 loffset, size, 331 uio->uio_resid, 332 (ap->a_ioflag >> 16), &bp); 333 else 334 error = bread(vp, loffset, size, &bp); 335 } else { 336 if (seqcount > 1 && 337 lblktosize(imp, rablock) < ip->i_size) { 338 rasize = blksize(imp, ip, rablock); 339 error = breadn(vp, loffset, size, &raoffset, 340 &rasize, 1, &bp); 341 } else 342 error = bread(vp, loffset, size, &bp); 343 } 344 n = min(n, size - bp->b_resid); 345 if (error) { 346 brelse(bp); 347 return (error); 348 } 349 350 error = uiomove(bp->b_data + on, (int)n, uio); 351 brelse(bp); 352 } while (error == 0 && uio->uio_resid > 0 && n != 0); 353 return (error); 354 } 355 356 /* struct dirent + enough space for the maximum supported size */ 357 struct iso_dirent { 358 struct dirent de; 359 char de_name[_DIRENT_RECLEN(NAME_MAX) - sizeof(struct dirent)]; 360 }; 361 362 /* 363 * Structure for reading directories 364 */ 365 struct isoreaddir { 366 struct iso_dirent saveent; 367 struct iso_dirent assocent; 368 struct iso_dirent current; 369 off_t saveoff; 370 off_t assocoff; 371 off_t curroff; 372 struct uio *uio; 373 off_t uio_off; 374 int eofflag; 375 off_t *cookies; 376 int ncookies; 377 }; 378 379 int 380 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 381 { 382 int error; 383 384 dp->d_name[dp->d_namlen] = 0; 385 386 if (idp->uio->uio_resid < _DIRENT_DIRSIZ(dp)) { 387 idp->eofflag = 0; 388 return (-1); 389 } 390 391 if (idp->cookies) { 392 if (idp->ncookies <= 0) { 393 idp->eofflag = 0; 394 return (-1); 395 } 396 397 *idp->cookies++ = off; 398 --idp->ncookies; 399 } 400 401 if ((error = uiomove((caddr_t) dp,_DIRENT_DIRSIZ(dp),idp->uio)) != 0) 402 return (error); 403 idp->uio_off = off; 404 return (0); 405 } 406 407 int 408 iso_shipdir(struct isoreaddir *idp) 409 { 410 struct dirent *dp; 411 int cl, sl, assoc; 412 int error; 413 char *cname, *sname; 414 415 cl = idp->current.de.d_namlen; 416 cname = idp->current.de.d_name; 417 assoc = (cl > 1) && (*cname == ASSOCCHAR); 418 if (assoc) { 419 cl--; 420 cname++; 421 } 422 423 dp = &idp->saveent.de; 424 sname = dp->d_name; 425 if (!(sl = dp->d_namlen)) { 426 dp = &idp->assocent.de; 427 sname = dp->d_name + 1; 428 sl = dp->d_namlen - 1; 429 } 430 if (sl > 0) { 431 if (sl != cl 432 || bcmp(sname,cname,sl)) { 433 if (idp->assocent.de.d_namlen) { 434 if ((error = iso_uiodir(idp,&idp->assocent.de,idp->assocoff)) != 0) 435 return (error); 436 idp->assocent.de.d_namlen = 0; 437 } 438 if (idp->saveent.de.d_namlen) { 439 if ((error = iso_uiodir(idp,&idp->saveent.de,idp->saveoff)) != 0) 440 return (error); 441 idp->saveent.de.d_namlen = 0; 442 } 443 } 444 } 445 if (assoc) { 446 idp->assocoff = idp->curroff; 447 bcopy(&idp->current,&idp->assocent,_DIRENT_DIRSIZ(&idp->current.de)); 448 } else { 449 idp->saveoff = idp->curroff; 450 bcopy(&idp->current,&idp->saveent,_DIRENT_DIRSIZ(&idp->current.de)); 451 } 452 return (0); 453 } 454 455 /* 456 * Vnode op for readdir 457 * 458 * cd9660_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, 459 * int *a_eofflag, int *a_ncookies, off_t *a_cookies) 460 */ 461 static int 462 cd9660_readdir(struct vop_readdir_args *ap) 463 { 464 struct uio *uio = ap->a_uio; 465 struct isoreaddir *idp; 466 struct vnode *vdp = ap->a_vp; 467 struct iso_node *dp; 468 struct iso_mnt *imp; 469 struct buf *bp = NULL; 470 struct iso_directory_record *ep; 471 int entryoffsetinblock; 472 doff_t endsearch; 473 u_long bmask; 474 int error = 0; 475 int reclen; 476 u_short namelen; 477 int ncookies = 0; 478 off_t *cookies = NULL; 479 480 dp = VTOI(vdp); 481 imp = dp->i_mnt; 482 bmask = imp->im_bmask; 483 484 if ((error = vn_lock(vdp, LK_EXCLUSIVE|LK_RETRY)) != 0) 485 return (error); 486 487 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK); 488 idp->saveent.de.d_namlen = idp->assocent.de.d_namlen = 0; 489 /* 490 * XXX 491 * Is it worth trying to figure out the type? 492 */ 493 idp->saveent.de.d_type = DT_UNKNOWN; 494 idp->assocent.de.d_type = DT_UNKNOWN; 495 idp->current.de.d_type = DT_UNKNOWN; 496 idp->uio = uio; 497 if (ap->a_ncookies == NULL) { 498 idp->cookies = NULL; 499 } else { 500 /* 501 * Guess the number of cookies needed. Guess at least 502 * 1 to avoid a degenerate case in malloc, and cap at 503 * a reasonable limit. 504 */ 505 ncookies = uio->uio_resid / 16 + 1; 506 if (ncookies > 1024) 507 ncookies = 1024; 508 MALLOC(cookies, off_t *, ncookies * sizeof(off_t), 509 M_TEMP, M_WAITOK); 510 idp->cookies = cookies; 511 idp->ncookies = ncookies; 512 } 513 idp->eofflag = 1; 514 idp->curroff = uio->uio_offset; 515 516 if ((entryoffsetinblock = idp->curroff & bmask) && 517 (error = cd9660_devblkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 518 FREE(idp, M_TEMP); 519 goto done; 520 } 521 endsearch = dp->i_size; 522 523 while (idp->curroff < endsearch) { 524 /* 525 * If offset is on a block boundary, 526 * read the next directory block. 527 * Release previous if it exists. 528 */ 529 if ((idp->curroff & bmask) == 0) { 530 if (bp != NULL) 531 brelse(bp); 532 if ((error = 533 cd9660_devblkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 534 break; 535 entryoffsetinblock = 0; 536 } 537 /* 538 * Get pointer to next entry. 539 */ 540 ep = (struct iso_directory_record *) 541 ((char *)bp->b_data + entryoffsetinblock); 542 543 reclen = isonum_711(ep->length); 544 if (reclen == 0) { 545 /* skip to next block, if any */ 546 idp->curroff = 547 (idp->curroff & ~bmask) + imp->logical_block_size; 548 continue; 549 } 550 551 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 552 error = EINVAL; 553 /* illegal entry, stop */ 554 break; 555 } 556 557 if (entryoffsetinblock + reclen > imp->logical_block_size) { 558 error = EINVAL; 559 /* illegal directory, so stop looking */ 560 break; 561 } 562 563 idp->current.de.d_namlen = isonum_711(ep->name_len); 564 565 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.de.d_namlen) { 566 error = EINVAL; 567 /* illegal entry, stop */ 568 break; 569 } 570 571 if (isonum_711(ep->flags)&2) 572 idp->current.de.d_ino = isodirino(ep, imp); 573 else 574 idp->current.de.d_ino = bp->b_bio1.bio_offset + 575 entryoffsetinblock; 576 577 idp->curroff += reclen; 578 579 switch (imp->iso_ftype) { 580 case ISO_FTYPE_RRIP: 581 { 582 ino_t cur_fileno = idp->current.de.d_ino; 583 cd9660_rrip_getname(ep,idp->current.de.d_name, &namelen, 584 &cur_fileno,imp); 585 idp->current.de.d_ino = cur_fileno; 586 idp->current.de.d_namlen = namelen; 587 if (idp->current.de.d_namlen) 588 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 589 break; 590 } 591 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 592 strcpy(idp->current.de.d_name,".."); 593 if (idp->current.de.d_namlen == 1 && ep->name[0] == 0) { 594 idp->current.de.d_namlen = 1; 595 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 596 } else if (idp->current.de.d_namlen == 1 && ep->name[0] == 1) { 597 idp->current.de.d_namlen = 2; 598 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 599 } else { 600 isofntrans(ep->name,idp->current.de.d_namlen, 601 idp->current.de.d_name, &namelen, 602 imp->iso_ftype == ISO_FTYPE_9660, 603 isonum_711(ep->flags)&4, 604 imp->joliet_level); 605 idp->current.de.d_namlen = namelen; 606 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 607 error = iso_shipdir(idp); 608 else 609 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 610 } 611 } 612 if (error) 613 break; 614 615 entryoffsetinblock += reclen; 616 } 617 618 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 619 idp->current.de.d_namlen = 0; 620 error = iso_shipdir(idp); 621 } 622 if (error < 0) 623 error = 0; 624 625 if (ap->a_ncookies != NULL) { 626 if (error) 627 kfree(cookies, M_TEMP); 628 else { 629 /* 630 * Work out the number of cookies actually used. 631 */ 632 *ap->a_ncookies = ncookies - idp->ncookies; 633 *ap->a_cookies = cookies; 634 } 635 } 636 637 if (bp) 638 brelse (bp); 639 640 uio->uio_offset = idp->uio_off; 641 *ap->a_eofflag = idp->eofflag; 642 643 FREE(idp, M_TEMP); 644 645 done: 646 vn_unlock(vdp); 647 return (error); 648 } 649 650 /* 651 * Return target name of a symbolic link 652 * Shouldn't we get the parent vnode and read the data from there? 653 * This could eventually result in deadlocks in cd9660_lookup. 654 * But otherwise the block read here is in the block buffer two times. 655 */ 656 typedef struct iso_directory_record ISODIR; 657 typedef struct iso_node ISONODE; 658 typedef struct iso_mnt ISOMNT; 659 /* 660 * cd9660_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 661 */ 662 static int 663 cd9660_readlink(struct vop_readlink_args *ap) 664 { 665 ISONODE *ip; 666 ISODIR *dirp; 667 ISOMNT *imp; 668 struct buf *bp; 669 struct uio *uio; 670 u_short symlen; 671 int error; 672 char *symname; 673 674 ip = VTOI(ap->a_vp); 675 imp = ip->i_mnt; 676 uio = ap->a_uio; 677 678 if (imp->iso_ftype != ISO_FTYPE_RRIP) 679 return (EINVAL); 680 681 /* 682 * Get parents directory record block that this inode included. 683 */ 684 error = bread(imp->im_devvp, 685 (off_t)ip->i_number & ~((1 << imp->im_bshift) - 1), 686 imp->logical_block_size, &bp); 687 if (error) { 688 brelse(bp); 689 return (EINVAL); 690 } 691 692 /* 693 * Setup the directory pointer for this inode 694 */ 695 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 696 697 /* 698 * Just make sure, we have a right one.... 699 * 1: Check not cross boundary on block 700 */ 701 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 702 > (unsigned)imp->logical_block_size) { 703 brelse(bp); 704 return (EINVAL); 705 } 706 707 /* 708 * Now get a buffer 709 * Abuse a namei buffer for now. 710 */ 711 if (uio->uio_segflg == UIO_SYSSPACE) 712 symname = uio->uio_iov->iov_base; 713 else 714 symname = objcache_get(namei_oc, M_WAITOK); 715 716 /* 717 * Ok, we just gathering a symbolic name in SL record. 718 */ 719 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 720 if (uio->uio_segflg != UIO_SYSSPACE) 721 objcache_put(namei_oc, symname); 722 brelse(bp); 723 return (EINVAL); 724 } 725 /* 726 * Don't forget before you leave from home ;-) 727 */ 728 brelse(bp); 729 730 /* 731 * return with the symbolic name to caller's. 732 */ 733 if (uio->uio_segflg != UIO_SYSSPACE) { 734 error = uiomove(symname, symlen, uio); 735 objcache_put(namei_oc, symname); 736 return (error); 737 } 738 uio->uio_resid -= symlen; 739 uio->uio_iov->iov_base += symlen; 740 uio->uio_iov->iov_len -= symlen; 741 return (0); 742 } 743 744 /* 745 * Calculate the logical to physical mapping if not done already, 746 * then call the device strategy routine. 747 * 748 * cd9660_strategy(struct buf *a_vp, struct buf *a_bio) 749 */ 750 static int 751 cd9660_strategy(struct vop_strategy_args *ap) 752 { 753 struct bio *bio = ap->a_bio; 754 struct bio *nbio; 755 struct buf *bp = bio->bio_buf; 756 struct vnode *vp = ap->a_vp; 757 struct iso_node *ip; 758 int error; 759 760 ip = VTOI(vp); 761 if (vp->v_type == VBLK || vp->v_type == VCHR) 762 panic("cd9660_strategy: spec"); 763 nbio = push_bio(bio); 764 if (nbio->bio_offset == NOOFFSET) { 765 error = VOP_BMAP(vp, bio->bio_offset, 766 &nbio->bio_offset, NULL, NULL); 767 if (error) { 768 bp->b_error = error; 769 bp->b_flags |= B_ERROR; 770 /* I/O was never started on nbio, must biodone(bio) */ 771 biodone(bio); 772 return (error); 773 } 774 if (nbio->bio_offset == NOOFFSET) 775 clrbuf(bp); 776 } 777 if (nbio->bio_offset == NOOFFSET) { 778 /* I/O was never started on nbio, must biodone(bio) */ 779 biodone(bio); 780 return (0); 781 } 782 vp = ip->i_devvp; 783 vn_strategy(vp, nbio); 784 return (0); 785 } 786 787 /* 788 * Print out the contents of an inode. 789 * 790 * cd9660_print(struct vnode *a_vp) 791 */ 792 static int 793 cd9660_print(struct vop_print_args *ap) 794 { 795 kprintf("tag VT_ISOFS, isofs vnode\n"); 796 return (0); 797 } 798 799 /* 800 * Return POSIX pathconf information applicable to cd9660 filesystems. 801 * 802 * cd9660_pathconf(struct vnode *a_vp, int a_name, register_t *a_retval) 803 */ 804 static int 805 cd9660_pathconf(struct vop_pathconf_args *ap) 806 { 807 switch (ap->a_name) { 808 case _PC_LINK_MAX: 809 *ap->a_retval = 1; 810 return (0); 811 case _PC_NAME_MAX: 812 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 813 *ap->a_retval = NAME_MAX; 814 else 815 *ap->a_retval = 37; 816 return (0); 817 case _PC_PATH_MAX: 818 *ap->a_retval = PATH_MAX; 819 return (0); 820 case _PC_PIPE_BUF: 821 *ap->a_retval = PIPE_BUF; 822 return (0); 823 case _PC_CHOWN_RESTRICTED: 824 *ap->a_retval = 1; 825 return (0); 826 case _PC_NO_TRUNC: 827 *ap->a_retval = 1; 828 return (0); 829 default: 830 return (EINVAL); 831 } 832 /* NOTREACHED */ 833 } 834 835 /* 836 * Advisory lock support 837 */ 838 static int 839 cd9660_advlock(struct vop_advlock_args *ap) 840 { 841 struct iso_node *ip = VTOI(ap->a_vp); 842 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size)); 843 } 844 845 846 /* 847 * Global vfs data structures for cd9660 848 */ 849 struct vop_ops cd9660_vnode_vops = { 850 .vop_default = vop_defaultop, 851 .vop_open = cd9660_open, 852 .vop_access = cd9660_access, 853 .vop_advlock = cd9660_advlock, 854 .vop_bmap = cd9660_bmap, 855 .vop_old_lookup = cd9660_lookup, 856 .vop_getattr = cd9660_getattr, 857 .vop_inactive = cd9660_inactive, 858 .vop_ioctl = cd9660_ioctl, 859 .vop_pathconf = cd9660_pathconf, 860 .vop_print = cd9660_print, 861 .vop_read = cd9660_read, 862 .vop_readdir = cd9660_readdir, 863 .vop_readlink = cd9660_readlink, 864 .vop_reclaim = cd9660_reclaim, 865 .vop_setattr = cd9660_setattr, 866 .vop_strategy = cd9660_strategy, 867 .vop_getpages = vop_stdgetpages, 868 .vop_putpages = vop_stdputpages 869 }; 870 871 /* 872 * Special device vnode ops 873 */ 874 struct vop_ops cd9660_spec_vops = { 875 .vop_default = spec_vnoperate, 876 .vop_access = cd9660_access, 877 .vop_getattr = cd9660_getattr, 878 .vop_inactive = cd9660_inactive, 879 .vop_print = cd9660_print, 880 .vop_reclaim = cd9660_reclaim, 881 .vop_setattr = cd9660_setattr, 882 }; 883 884 struct vop_ops cd9660_fifo_vops = { 885 .vop_default = fifo_vnoperate, 886 .vop_access = cd9660_access, 887 .vop_getattr = cd9660_getattr, 888 .vop_inactive = cd9660_inactive, 889 .vop_print = cd9660_print, 890 .vop_reclaim = cd9660_reclaim, 891 .vop_setattr = cd9660_setattr, 892 }; 893 894