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 1.19 2006/02/17 19:18:07 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 59 #include <vm/vm.h> 60 #include <vm/vm_zone.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_read (struct vop_read_args *); 73 static int cd9660_setattr (struct vop_setattr_args *); 74 struct isoreaddir; 75 static int iso_uiodir (struct isoreaddir *idp, struct dirent *dp, 76 off_t off); 77 static int iso_shipdir (struct isoreaddir *idp); 78 static int cd9660_readdir (struct vop_readdir_args *); 79 static int cd9660_readlink (struct vop_readlink_args *ap); 80 static int cd9660_strategy (struct vop_strategy_args *); 81 static int cd9660_print (struct vop_print_args *); 82 static int cd9660_getpages (struct vop_getpages_args *); 83 static int cd9660_putpages (struct vop_putpages_args *); 84 85 /* 86 * Setattr call. Only allowed for block and character special devices. 87 * 88 * cd9660_setattr(struct vnodeop_desc *a_desc, struct vnode *a_vp, 89 * struct vattr *a_vap, struct ucred *a_cred, struct proc *a_p) 90 */ 91 int 92 cd9660_setattr(struct vop_setattr_args *ap) 93 { 94 struct vnode *vp = ap->a_vp; 95 struct vattr *vap = ap->a_vap; 96 97 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL || 98 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 99 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) 100 return (EROFS); 101 if (vap->va_size != (u_quad_t)VNOVAL) { 102 switch (vp->v_type) { 103 case VDIR: 104 return (EISDIR); 105 case VLNK: 106 case VREG: 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, struct thread *a_td) 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_rdev = ip->inode.iso_rdev; 217 218 vap->va_size = (u_quad_t)(unsigned long)ip->i_size; 219 if (ip->i_size == 0 && (vap->va_mode & S_IFMT) == S_IFLNK) { 220 struct vop_readlink_args rdlnk; 221 struct iovec aiov; 222 struct uio auio; 223 char *cp; 224 225 MALLOC(cp, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 226 aiov.iov_base = cp; 227 aiov.iov_len = MAXPATHLEN; 228 auio.uio_iov = &aiov; 229 auio.uio_iovcnt = 1; 230 auio.uio_offset = 0; 231 auio.uio_rw = UIO_READ; 232 auio.uio_segflg = UIO_SYSSPACE; 233 auio.uio_td = ap->a_td; 234 auio.uio_resid = MAXPATHLEN; 235 rdlnk.a_uio = &auio; 236 rdlnk.a_vp = ap->a_vp; 237 rdlnk.a_cred = proc0.p_ucred; /* use root cred */ 238 if (cd9660_readlink(&rdlnk) == 0) 239 vap->va_size = MAXPATHLEN - auio.uio_resid; 240 FREE(cp, M_TEMP); 241 } 242 vap->va_flags = 0; 243 vap->va_gen = 1; 244 vap->va_blocksize = ip->i_mnt->logical_block_size; 245 vap->va_bytes = (u_quad_t) ip->i_size; 246 vap->va_type = vp->v_type; 247 vap->va_filerev = 0; 248 return (0); 249 } 250 251 /* 252 * Vnode op for ioctl. 253 * 254 * cd9660_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data, 255 * int a_fflag, struct ucred *a_cred, struct proc *a_p) 256 */ 257 static int 258 cd9660_ioctl(struct vop_ioctl_args *ap) 259 { 260 struct vnode *vp = ap->a_vp; 261 struct iso_node *ip = VTOI(vp); 262 263 switch (ap->a_command) { 264 265 case FIOGETLBA: 266 *(int *)(ap->a_data) = ip->iso_start; 267 return 0; 268 default: 269 return (ENOTTY); 270 } 271 } 272 273 /* 274 * Vnode op for reading. 275 * 276 * cd9660_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, 277 * struct ucred *a_cred) 278 */ 279 static int 280 cd9660_read(struct vop_read_args *ap) 281 { 282 struct vnode *vp = ap->a_vp; 283 struct uio *uio = ap->a_uio; 284 struct iso_node *ip = VTOI(vp); 285 struct iso_mnt *imp; 286 struct buf *bp; 287 daddr_t lbn, rablock; 288 off_t diff; 289 int rasize, error = 0; 290 int seqcount; 291 long size, n, on; 292 293 seqcount = ap->a_ioflag >> 16; 294 295 if (uio->uio_resid == 0) 296 return (0); 297 if (uio->uio_offset < 0) 298 return (EINVAL); 299 ip->i_flag |= IN_ACCESS; 300 imp = ip->i_mnt; 301 do { 302 lbn = lblkno(imp, uio->uio_offset); 303 on = blkoff(imp, uio->uio_offset); 304 n = min((u_int)(imp->logical_block_size - on), 305 uio->uio_resid); 306 diff = (off_t)ip->i_size - uio->uio_offset; 307 if (diff <= 0) 308 return (0); 309 if (diff < n) 310 n = diff; 311 size = blksize(imp, ip, lbn); 312 rablock = lbn + 1; 313 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) { 314 if (lblktosize(imp, rablock) < ip->i_size) 315 error = cluster_read(vp, (off_t)ip->i_size, 316 lbn, size, uio->uio_resid, 317 (ap->a_ioflag >> 16), &bp); 318 else 319 error = bread(vp, lbn, size, &bp); 320 } else { 321 if (seqcount > 1 && 322 lblktosize(imp, rablock) < ip->i_size) { 323 rasize = blksize(imp, ip, rablock); 324 error = breadn(vp, lbn, size, &rablock, 325 &rasize, 1, &bp); 326 } else 327 error = bread(vp, lbn, size, &bp); 328 } 329 n = min(n, size - bp->b_resid); 330 if (error) { 331 brelse(bp); 332 return (error); 333 } 334 335 error = uiomove(bp->b_data + on, (int)n, uio); 336 brelse(bp); 337 } while (error == 0 && uio->uio_resid > 0 && n != 0); 338 return (error); 339 } 340 341 /* struct dirent + enough space for the maximum supported size */ 342 struct iso_dirent { 343 struct dirent de; 344 char de_name[_DIRENT_RECLEN(NAME_MAX) - sizeof(struct dirent)]; 345 }; 346 347 /* 348 * Structure for reading directories 349 */ 350 struct isoreaddir { 351 struct iso_dirent saveent; 352 struct iso_dirent assocent; 353 struct iso_dirent current; 354 off_t saveoff; 355 off_t assocoff; 356 off_t curroff; 357 struct uio *uio; 358 off_t uio_off; 359 int eofflag; 360 u_long *cookies; 361 int ncookies; 362 }; 363 364 int 365 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 366 { 367 int error; 368 369 dp->d_name[dp->d_namlen] = 0; 370 371 if (idp->uio->uio_resid < _DIRENT_DIRSIZ(dp)) { 372 idp->eofflag = 0; 373 return (-1); 374 } 375 376 if (idp->cookies) { 377 if (idp->ncookies <= 0) { 378 idp->eofflag = 0; 379 return (-1); 380 } 381 382 *idp->cookies++ = off; 383 --idp->ncookies; 384 } 385 386 if ((error = uiomove((caddr_t) dp,_DIRENT_DIRSIZ(dp),idp->uio)) != 0) 387 return (error); 388 idp->uio_off = off; 389 return (0); 390 } 391 392 int 393 iso_shipdir(struct isoreaddir *idp) 394 { 395 struct dirent *dp; 396 int cl, sl, assoc; 397 int error; 398 char *cname, *sname; 399 400 cl = idp->current.de.d_namlen; 401 cname = idp->current.de.d_name; 402 assoc = (cl > 1) && (*cname == ASSOCCHAR); 403 if (assoc) { 404 cl--; 405 cname++; 406 } 407 408 dp = &idp->saveent.de; 409 sname = dp->d_name; 410 if (!(sl = dp->d_namlen)) { 411 dp = &idp->assocent.de; 412 sname = dp->d_name + 1; 413 sl = dp->d_namlen - 1; 414 } 415 if (sl > 0) { 416 if (sl != cl 417 || bcmp(sname,cname,sl)) { 418 if (idp->assocent.de.d_namlen) { 419 if ((error = iso_uiodir(idp,&idp->assocent.de,idp->assocoff)) != 0) 420 return (error); 421 idp->assocent.de.d_namlen = 0; 422 } 423 if (idp->saveent.de.d_namlen) { 424 if ((error = iso_uiodir(idp,&idp->saveent.de,idp->saveoff)) != 0) 425 return (error); 426 idp->saveent.de.d_namlen = 0; 427 } 428 } 429 } 430 if (assoc) { 431 idp->assocoff = idp->curroff; 432 bcopy(&idp->current,&idp->assocent,_DIRENT_DIRSIZ(&idp->current.de)); 433 } else { 434 idp->saveoff = idp->curroff; 435 bcopy(&idp->current,&idp->saveent,_DIRENT_DIRSIZ(&idp->current.de)); 436 } 437 return (0); 438 } 439 440 /* 441 * Vnode op for readdir 442 * 443 * cd9660_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, 444 * int *a_eofflag, int *a_ncookies, u_long *a_cookies) 445 */ 446 static int 447 cd9660_readdir(struct vop_readdir_args *ap) 448 { 449 struct uio *uio = ap->a_uio; 450 struct isoreaddir *idp; 451 struct vnode *vdp = ap->a_vp; 452 struct iso_node *dp; 453 struct iso_mnt *imp; 454 struct buf *bp = NULL; 455 struct iso_directory_record *ep; 456 int entryoffsetinblock; 457 doff_t endsearch; 458 u_long bmask; 459 int error = 0; 460 int reclen; 461 u_short namelen; 462 int ncookies = 0; 463 u_long *cookies = NULL; 464 465 dp = VTOI(vdp); 466 imp = dp->i_mnt; 467 bmask = imp->im_bmask; 468 469 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK); 470 idp->saveent.de.d_namlen = idp->assocent.de.d_namlen = 0; 471 /* 472 * XXX 473 * Is it worth trying to figure out the type? 474 */ 475 idp->saveent.de.d_type = DT_UNKNOWN; 476 idp->assocent.de.d_type = DT_UNKNOWN; 477 idp->current.de.d_type = DT_UNKNOWN; 478 idp->uio = uio; 479 if (ap->a_ncookies == NULL) { 480 idp->cookies = NULL; 481 } else { 482 /* 483 * Guess the number of cookies needed. 484 */ 485 ncookies = uio->uio_resid / 16; 486 MALLOC(cookies, u_long *, ncookies * sizeof(u_int), M_TEMP, 487 M_WAITOK); 488 idp->cookies = cookies; 489 idp->ncookies = ncookies; 490 } 491 idp->eofflag = 1; 492 idp->curroff = uio->uio_offset; 493 494 if ((entryoffsetinblock = idp->curroff & bmask) && 495 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 496 FREE(idp, M_TEMP); 497 return (error); 498 } 499 endsearch = dp->i_size; 500 501 while (idp->curroff < endsearch) { 502 /* 503 * If offset is on a block boundary, 504 * read the next directory block. 505 * Release previous if it exists. 506 */ 507 if ((idp->curroff & bmask) == 0) { 508 if (bp != NULL) 509 brelse(bp); 510 if ((error = 511 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 512 break; 513 entryoffsetinblock = 0; 514 } 515 /* 516 * Get pointer to next entry. 517 */ 518 ep = (struct iso_directory_record *) 519 ((char *)bp->b_data + entryoffsetinblock); 520 521 reclen = isonum_711(ep->length); 522 if (reclen == 0) { 523 /* skip to next block, if any */ 524 idp->curroff = 525 (idp->curroff & ~bmask) + imp->logical_block_size; 526 continue; 527 } 528 529 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 530 error = EINVAL; 531 /* illegal entry, stop */ 532 break; 533 } 534 535 if (entryoffsetinblock + reclen > imp->logical_block_size) { 536 error = EINVAL; 537 /* illegal directory, so stop looking */ 538 break; 539 } 540 541 idp->current.de.d_namlen = isonum_711(ep->name_len); 542 543 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.de.d_namlen) { 544 error = EINVAL; 545 /* illegal entry, stop */ 546 break; 547 } 548 549 if (isonum_711(ep->flags)&2) 550 idp->current.de.d_ino = isodirino(ep, imp); 551 else 552 idp->current.de.d_ino = dbtob(bp->b_bio2.bio_blkno) + 553 entryoffsetinblock; 554 555 idp->curroff += reclen; 556 557 switch (imp->iso_ftype) { 558 case ISO_FTYPE_RRIP: 559 { 560 ino_t cur_fileno = idp->current.de.d_ino; 561 cd9660_rrip_getname(ep,idp->current.de.d_name, &namelen, 562 &cur_fileno,imp); 563 idp->current.de.d_ino = cur_fileno; 564 idp->current.de.d_namlen = namelen; 565 if (idp->current.de.d_namlen) 566 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 567 break; 568 } 569 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 570 strcpy(idp->current.de.d_name,".."); 571 if (idp->current.de.d_namlen == 1 && ep->name[0] == 0) { 572 idp->current.de.d_namlen = 1; 573 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 574 } else if (idp->current.de.d_namlen == 1 && ep->name[0] == 1) { 575 idp->current.de.d_namlen = 2; 576 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 577 } else { 578 isofntrans(ep->name,idp->current.de.d_namlen, 579 idp->current.de.d_name, &namelen, 580 imp->iso_ftype == ISO_FTYPE_9660, 581 isonum_711(ep->flags)&4, 582 imp->joliet_level); 583 idp->current.de.d_namlen = namelen; 584 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 585 error = iso_shipdir(idp); 586 else 587 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 588 } 589 } 590 if (error) 591 break; 592 593 entryoffsetinblock += reclen; 594 } 595 596 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 597 idp->current.de.d_namlen = 0; 598 error = iso_shipdir(idp); 599 } 600 if (error < 0) 601 error = 0; 602 603 if (ap->a_ncookies != NULL) { 604 if (error) 605 free(cookies, M_TEMP); 606 else { 607 /* 608 * Work out the number of cookies actually used. 609 */ 610 *ap->a_ncookies = ncookies - idp->ncookies; 611 *ap->a_cookies = cookies; 612 } 613 } 614 615 if (bp) 616 brelse (bp); 617 618 uio->uio_offset = idp->uio_off; 619 *ap->a_eofflag = idp->eofflag; 620 621 FREE(idp, M_TEMP); 622 623 return (error); 624 } 625 626 /* 627 * Return target name of a symbolic link 628 * Shouldn't we get the parent vnode and read the data from there? 629 * This could eventually result in deadlocks in cd9660_lookup. 630 * But otherwise the block read here is in the block buffer two times. 631 */ 632 typedef struct iso_directory_record ISODIR; 633 typedef struct iso_node ISONODE; 634 typedef struct iso_mnt ISOMNT; 635 /* 636 * cd9660_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 637 */ 638 static int 639 cd9660_readlink(struct vop_readlink_args *ap) 640 { 641 ISONODE *ip; 642 ISODIR *dirp; 643 ISOMNT *imp; 644 struct buf *bp; 645 struct uio *uio; 646 u_short symlen; 647 int error; 648 char *symname; 649 650 ip = VTOI(ap->a_vp); 651 imp = ip->i_mnt; 652 uio = ap->a_uio; 653 654 if (imp->iso_ftype != ISO_FTYPE_RRIP) 655 return (EINVAL); 656 657 /* 658 * Get parents directory record block that this inode included. 659 */ 660 error = bread(imp->im_devvp, 661 (ip->i_number >> imp->im_bshift) << 662 (imp->im_bshift - DEV_BSHIFT), 663 imp->logical_block_size, &bp); 664 if (error) { 665 brelse(bp); 666 return (EINVAL); 667 } 668 669 /* 670 * Setup the directory pointer for this inode 671 */ 672 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 673 674 /* 675 * Just make sure, we have a right one.... 676 * 1: Check not cross boundary on block 677 */ 678 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 679 > (unsigned)imp->logical_block_size) { 680 brelse(bp); 681 return (EINVAL); 682 } 683 684 /* 685 * Now get a buffer 686 * Abuse a namei buffer for now. 687 */ 688 if (uio->uio_segflg == UIO_SYSSPACE) 689 symname = uio->uio_iov->iov_base; 690 else 691 symname = zalloc(namei_zone); 692 693 /* 694 * Ok, we just gathering a symbolic name in SL record. 695 */ 696 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 697 if (uio->uio_segflg != UIO_SYSSPACE) 698 zfree(namei_zone, symname); 699 brelse(bp); 700 return (EINVAL); 701 } 702 /* 703 * Don't forget before you leave from home ;-) 704 */ 705 brelse(bp); 706 707 /* 708 * return with the symbolic name to caller's. 709 */ 710 if (uio->uio_segflg != UIO_SYSSPACE) { 711 error = uiomove(symname, symlen, uio); 712 zfree(namei_zone, symname); 713 return (error); 714 } 715 uio->uio_resid -= symlen; 716 uio->uio_iov->iov_base += symlen; 717 uio->uio_iov->iov_len -= symlen; 718 return (0); 719 } 720 721 /* 722 * Calculate the logical to physical mapping if not done already, 723 * then call the device strategy routine. 724 * 725 * cd9660_strategy(struct buf *a_vp, struct buf *a_bio) 726 */ 727 static int 728 cd9660_strategy(struct vop_strategy_args *ap) 729 { 730 struct bio *bio = ap->a_bio; 731 struct bio *nbio; 732 struct buf *bp = bio->bio_buf; 733 struct vnode *vp = ap->a_vp; 734 struct iso_node *ip; 735 int error; 736 737 ip = VTOI(vp); 738 if (vp->v_type == VBLK || vp->v_type == VCHR) 739 panic("cd9660_strategy: spec"); 740 nbio = push_bio(bio); 741 if (nbio->bio_blkno == (daddr_t)-1) { 742 error = VOP_BMAP(vp, bio->bio_blkno, NULL, &nbio->bio_blkno, 743 NULL, NULL); 744 if (error) { 745 bp->b_error = error; 746 bp->b_flags |= B_ERROR; 747 /* I/O was never started on nbio, must biodone(bio) */ 748 biodone(bio); 749 return (error); 750 } 751 if (nbio->bio_blkno == (daddr_t)-1) 752 clrbuf(bp); 753 } 754 if (nbio->bio_blkno == (daddr_t)-1) { 755 /* I/O was never started on nbio, must biodone(bio) */ 756 biodone(bio); 757 return (0); 758 } 759 vp = ip->i_devvp; 760 vn_strategy(vp, nbio); 761 return (0); 762 } 763 764 /* 765 * Print out the contents of an inode. 766 * 767 * cd9660_print(struct vnode *a_vp) 768 */ 769 static int 770 cd9660_print(struct vop_print_args *ap) 771 { 772 printf("tag VT_ISOFS, isofs vnode\n"); 773 return (0); 774 } 775 776 /* 777 * Return POSIX pathconf information applicable to cd9660 filesystems. 778 * 779 * cd9660_pathconf(struct vnode *a_vp, int a_name, register_t *a_retval) 780 */ 781 static int 782 cd9660_pathconf(struct vop_pathconf_args *ap) 783 { 784 switch (ap->a_name) { 785 case _PC_LINK_MAX: 786 *ap->a_retval = 1; 787 return (0); 788 case _PC_NAME_MAX: 789 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 790 *ap->a_retval = NAME_MAX; 791 else 792 *ap->a_retval = 37; 793 return (0); 794 case _PC_PATH_MAX: 795 *ap->a_retval = PATH_MAX; 796 return (0); 797 case _PC_PIPE_BUF: 798 *ap->a_retval = PIPE_BUF; 799 return (0); 800 case _PC_CHOWN_RESTRICTED: 801 *ap->a_retval = 1; 802 return (0); 803 case _PC_NO_TRUNC: 804 *ap->a_retval = 1; 805 return (0); 806 default: 807 return (EINVAL); 808 } 809 /* NOTREACHED */ 810 } 811 812 /* 813 * get page routine 814 * 815 * XXX By default, wimp out... note that a_offset is ignored (and always 816 * XXX has been). 817 */ 818 int 819 cd9660_getpages(struct vop_getpages_args *ap) 820 { 821 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 822 ap->a_reqpage); 823 } 824 825 /* 826 * put page routine 827 * 828 * XXX By default, wimp out... note that a_offset is ignored (and always 829 * XXX has been). 830 */ 831 int 832 cd9660_putpages(struct vop_putpages_args *ap) 833 { 834 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 835 ap->a_sync, ap->a_rtvals); 836 } 837 838 /* 839 * Advisory lock support 840 */ 841 static int 842 cd9660_advlock(struct vop_advlock_args *ap) 843 { 844 struct iso_node *ip = VTOI(ap->a_vp); 845 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size)); 846 } 847 848 849 /* 850 * Global vfs data structures for cd9660 851 */ 852 struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = { 853 { &vop_default_desc, (vnodeopv_entry_t) vop_defaultop }, 854 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access }, 855 { &vop_advlock_desc, (vnodeopv_entry_t) cd9660_advlock }, 856 { &vop_bmap_desc, (vnodeopv_entry_t) cd9660_bmap }, 857 { &vop_old_lookup_desc, (vnodeopv_entry_t) cd9660_lookup }, 858 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr }, 859 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive }, 860 { &vop_ioctl_desc, (vnodeopv_entry_t) cd9660_ioctl }, 861 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, 862 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, 863 { &vop_pathconf_desc, (vnodeopv_entry_t) cd9660_pathconf }, 864 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print }, 865 { &vop_read_desc, (vnodeopv_entry_t) cd9660_read }, 866 { &vop_readdir_desc, (vnodeopv_entry_t) cd9660_readdir }, 867 { &vop_readlink_desc, (vnodeopv_entry_t) cd9660_readlink }, 868 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim }, 869 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr }, 870 { &vop_strategy_desc, (vnodeopv_entry_t) cd9660_strategy }, 871 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, 872 { &vop_getpages_desc, (vnodeopv_entry_t) cd9660_getpages }, 873 { &vop_putpages_desc, (vnodeopv_entry_t) cd9660_putpages }, 874 { NULL, NULL } 875 }; 876 877 /* 878 * Special device vnode ops 879 */ 880 struct vnodeopv_entry_desc cd9660_specop_entries[] = { 881 { &vop_default_desc, (vnodeopv_entry_t) spec_vnoperate }, 882 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access }, 883 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr }, 884 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive }, 885 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, 886 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, 887 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print }, 888 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim }, 889 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr }, 890 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, 891 { NULL, NULL } 892 }; 893 894 struct vnodeopv_entry_desc cd9660_fifoop_entries[] = { 895 { &vop_default_desc, (vnodeopv_entry_t) fifo_vnoperate }, 896 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access }, 897 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr }, 898 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive }, 899 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, 900 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, 901 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print }, 902 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim }, 903 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr }, 904 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, 905 { NULL, NULL } 906 }; 907 908