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 1.11 2004/08/17 18:57:33 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) 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 /* 342 * Structure for reading directories 343 */ 344 struct isoreaddir { 345 struct dirent saveent; 346 struct dirent assocent; 347 struct dirent current; 348 off_t saveoff; 349 off_t assocoff; 350 off_t curroff; 351 struct uio *uio; 352 off_t uio_off; 353 int eofflag; 354 u_long *cookies; 355 int ncookies; 356 }; 357 358 int 359 iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off) 360 { 361 int error; 362 363 dp->d_name[dp->d_namlen] = 0; 364 dp->d_reclen = GENERIC_DIRSIZ(dp); 365 366 if (idp->uio->uio_resid < dp->d_reclen) { 367 idp->eofflag = 0; 368 return (-1); 369 } 370 371 if (idp->cookies) { 372 if (idp->ncookies <= 0) { 373 idp->eofflag = 0; 374 return (-1); 375 } 376 377 *idp->cookies++ = off; 378 --idp->ncookies; 379 } 380 381 if ((error = uiomove((caddr_t) dp,dp->d_reclen,idp->uio)) != 0) 382 return (error); 383 idp->uio_off = off; 384 return (0); 385 } 386 387 int 388 iso_shipdir(struct isoreaddir *idp) 389 { 390 struct dirent *dp; 391 int cl, sl, assoc; 392 int error; 393 char *cname, *sname; 394 395 cl = idp->current.d_namlen; 396 cname = idp->current.d_name; 397 assoc = (cl > 1) && (*cname == ASSOCCHAR); 398 if (assoc) { 399 cl--; 400 cname++; 401 } 402 403 dp = &idp->saveent; 404 sname = dp->d_name; 405 if (!(sl = dp->d_namlen)) { 406 dp = &idp->assocent; 407 sname = dp->d_name + 1; 408 sl = dp->d_namlen - 1; 409 } 410 if (sl > 0) { 411 if (sl != cl 412 || bcmp(sname,cname,sl)) { 413 if (idp->assocent.d_namlen) { 414 if ((error = iso_uiodir(idp,&idp->assocent,idp->assocoff)) != 0) 415 return (error); 416 idp->assocent.d_namlen = 0; 417 } 418 if (idp->saveent.d_namlen) { 419 if ((error = iso_uiodir(idp,&idp->saveent,idp->saveoff)) != 0) 420 return (error); 421 idp->saveent.d_namlen = 0; 422 } 423 } 424 } 425 idp->current.d_reclen = GENERIC_DIRSIZ(&idp->current); 426 if (assoc) { 427 idp->assocoff = idp->curroff; 428 bcopy(&idp->current,&idp->assocent,idp->current.d_reclen); 429 } else { 430 idp->saveoff = idp->curroff; 431 bcopy(&idp->current,&idp->saveent,idp->current.d_reclen); 432 } 433 return (0); 434 } 435 436 /* 437 * Vnode op for readdir 438 * 439 * cd9660_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred, 440 * int *a_eofflag, int *a_ncookies, u_long *a_cookies) 441 */ 442 static int 443 cd9660_readdir(struct vop_readdir_args *ap) 444 { 445 struct uio *uio = ap->a_uio; 446 struct isoreaddir *idp; 447 struct vnode *vdp = ap->a_vp; 448 struct iso_node *dp; 449 struct iso_mnt *imp; 450 struct buf *bp = NULL; 451 struct iso_directory_record *ep; 452 int entryoffsetinblock; 453 doff_t endsearch; 454 u_long bmask; 455 int error = 0; 456 int reclen; 457 u_short namelen; 458 int ncookies = 0; 459 u_long *cookies = NULL; 460 461 dp = VTOI(vdp); 462 imp = dp->i_mnt; 463 bmask = imp->im_bmask; 464 465 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK); 466 idp->saveent.d_namlen = idp->assocent.d_namlen = 0; 467 /* 468 * XXX 469 * Is it worth trying to figure out the type? 470 */ 471 idp->saveent.d_type = idp->assocent.d_type = idp->current.d_type = 472 DT_UNKNOWN; 473 idp->uio = uio; 474 if (ap->a_ncookies == NULL) { 475 idp->cookies = NULL; 476 } else { 477 /* 478 * Guess the number of cookies needed. 479 */ 480 ncookies = uio->uio_resid / 16; 481 MALLOC(cookies, u_long *, ncookies * sizeof(u_int), M_TEMP, 482 M_WAITOK); 483 idp->cookies = cookies; 484 idp->ncookies = ncookies; 485 } 486 idp->eofflag = 1; 487 idp->curroff = uio->uio_offset; 488 489 if ((entryoffsetinblock = idp->curroff & bmask) && 490 (error = cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 491 FREE(idp, M_TEMP); 492 return (error); 493 } 494 endsearch = dp->i_size; 495 496 while (idp->curroff < endsearch) { 497 /* 498 * If offset is on a block boundary, 499 * read the next directory block. 500 * Release previous if it exists. 501 */ 502 if ((idp->curroff & bmask) == 0) { 503 if (bp != NULL) 504 brelse(bp); 505 if ((error = 506 cd9660_blkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 507 break; 508 entryoffsetinblock = 0; 509 } 510 /* 511 * Get pointer to next entry. 512 */ 513 ep = (struct iso_directory_record *) 514 ((char *)bp->b_data + entryoffsetinblock); 515 516 reclen = isonum_711(ep->length); 517 if (reclen == 0) { 518 /* skip to next block, if any */ 519 idp->curroff = 520 (idp->curroff & ~bmask) + imp->logical_block_size; 521 continue; 522 } 523 524 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 525 error = EINVAL; 526 /* illegal entry, stop */ 527 break; 528 } 529 530 if (entryoffsetinblock + reclen > imp->logical_block_size) { 531 error = EINVAL; 532 /* illegal directory, so stop looking */ 533 break; 534 } 535 536 idp->current.d_namlen = isonum_711(ep->name_len); 537 538 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) { 539 error = EINVAL; 540 /* illegal entry, stop */ 541 break; 542 } 543 544 if (isonum_711(ep->flags)&2) 545 idp->current.d_fileno = isodirino(ep, imp); 546 else 547 idp->current.d_fileno = dbtob(bp->b_blkno) + 548 entryoffsetinblock; 549 550 idp->curroff += reclen; 551 552 switch (imp->iso_ftype) { 553 case ISO_FTYPE_RRIP: 554 cd9660_rrip_getname(ep,idp->current.d_name, &namelen, 555 &idp->current.d_fileno,imp); 556 idp->current.d_namlen = (u_char)namelen; 557 if (idp->current.d_namlen) 558 error = iso_uiodir(idp,&idp->current,idp->curroff); 559 break; 560 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 561 strcpy(idp->current.d_name,".."); 562 if (idp->current.d_namlen == 1 && ep->name[0] == 0) { 563 idp->current.d_namlen = 1; 564 error = iso_uiodir(idp,&idp->current,idp->curroff); 565 } else if (idp->current.d_namlen == 1 && ep->name[0] == 1) { 566 idp->current.d_namlen = 2; 567 error = iso_uiodir(idp,&idp->current,idp->curroff); 568 } else { 569 isofntrans(ep->name,idp->current.d_namlen, 570 idp->current.d_name, &namelen, 571 imp->iso_ftype == ISO_FTYPE_9660, 572 isonum_711(ep->flags)&4, 573 imp->joliet_level); 574 idp->current.d_namlen = (u_char)namelen; 575 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 576 error = iso_shipdir(idp); 577 else 578 error = iso_uiodir(idp,&idp->current,idp->curroff); 579 } 580 } 581 if (error) 582 break; 583 584 entryoffsetinblock += reclen; 585 } 586 587 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 588 idp->current.d_namlen = 0; 589 error = iso_shipdir(idp); 590 } 591 if (error < 0) 592 error = 0; 593 594 if (ap->a_ncookies != NULL) { 595 if (error) 596 free(cookies, M_TEMP); 597 else { 598 /* 599 * Work out the number of cookies actually used. 600 */ 601 *ap->a_ncookies = ncookies - idp->ncookies; 602 *ap->a_cookies = cookies; 603 } 604 } 605 606 if (bp) 607 brelse (bp); 608 609 uio->uio_offset = idp->uio_off; 610 *ap->a_eofflag = idp->eofflag; 611 612 FREE(idp, M_TEMP); 613 614 return (error); 615 } 616 617 /* 618 * Return target name of a symbolic link 619 * Shouldn't we get the parent vnode and read the data from there? 620 * This could eventually result in deadlocks in cd9660_lookup. 621 * But otherwise the block read here is in the block buffer two times. 622 */ 623 typedef struct iso_directory_record ISODIR; 624 typedef struct iso_node ISONODE; 625 typedef struct iso_mnt ISOMNT; 626 /* 627 * cd9660_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 628 */ 629 static int 630 cd9660_readlink(struct vop_readlink_args *ap) 631 { 632 ISONODE *ip; 633 ISODIR *dirp; 634 ISOMNT *imp; 635 struct buf *bp; 636 struct uio *uio; 637 u_short symlen; 638 int error; 639 char *symname; 640 641 ip = VTOI(ap->a_vp); 642 imp = ip->i_mnt; 643 uio = ap->a_uio; 644 645 if (imp->iso_ftype != ISO_FTYPE_RRIP) 646 return (EINVAL); 647 648 /* 649 * Get parents directory record block that this inode included. 650 */ 651 error = bread(imp->im_devvp, 652 (ip->i_number >> imp->im_bshift) << 653 (imp->im_bshift - DEV_BSHIFT), 654 imp->logical_block_size, &bp); 655 if (error) { 656 brelse(bp); 657 return (EINVAL); 658 } 659 660 /* 661 * Setup the directory pointer for this inode 662 */ 663 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 664 665 /* 666 * Just make sure, we have a right one.... 667 * 1: Check not cross boundary on block 668 */ 669 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 670 > (unsigned)imp->logical_block_size) { 671 brelse(bp); 672 return (EINVAL); 673 } 674 675 /* 676 * Now get a buffer 677 * Abuse a namei buffer for now. 678 */ 679 if (uio->uio_segflg == UIO_SYSSPACE) 680 symname = uio->uio_iov->iov_base; 681 else 682 symname = zalloc(namei_zone); 683 684 /* 685 * Ok, we just gathering a symbolic name in SL record. 686 */ 687 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 688 if (uio->uio_segflg != UIO_SYSSPACE) 689 zfree(namei_zone, symname); 690 brelse(bp); 691 return (EINVAL); 692 } 693 /* 694 * Don't forget before you leave from home ;-) 695 */ 696 brelse(bp); 697 698 /* 699 * return with the symbolic name to caller's. 700 */ 701 if (uio->uio_segflg != UIO_SYSSPACE) { 702 error = uiomove(symname, symlen, uio); 703 zfree(namei_zone, symname); 704 return (error); 705 } 706 uio->uio_resid -= symlen; 707 uio->uio_iov->iov_base += symlen; 708 uio->uio_iov->iov_len -= symlen; 709 return (0); 710 } 711 712 /* 713 * Calculate the logical to physical mapping if not done already, 714 * then call the device strategy routine. 715 * 716 * cd9660_strategy(struct buf *a_vp, struct buf *a_bp) 717 */ 718 static int 719 cd9660_strategy(struct vop_strategy_args *ap) 720 { 721 struct buf *bp = ap->a_bp; 722 struct vnode *vp = bp->b_vp; 723 struct iso_node *ip; 724 int error; 725 726 ip = VTOI(vp); 727 if (vp->v_type == VBLK || vp->v_type == VCHR) 728 panic("cd9660_strategy: spec"); 729 if (bp->b_blkno == bp->b_lblkno) { 730 if ((error = 731 VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL, NULL))) { 732 bp->b_error = error; 733 bp->b_flags |= B_ERROR; 734 biodone(bp); 735 return (error); 736 } 737 if ((long)bp->b_blkno == -1) 738 clrbuf(bp); 739 } 740 if ((long)bp->b_blkno == -1) { 741 biodone(bp); 742 return (0); 743 } 744 vp = ip->i_devvp; 745 bp->b_dev = vp->v_rdev; 746 VOP_STRATEGY(vp, bp); 747 return (0); 748 } 749 750 /* 751 * Print out the contents of an inode. 752 * 753 * cd9660_print(struct vnode *a_vp) 754 */ 755 static int 756 cd9660_print(struct vop_print_args *ap) 757 { 758 printf("tag VT_ISOFS, isofs vnode\n"); 759 return (0); 760 } 761 762 /* 763 * Return POSIX pathconf information applicable to cd9660 filesystems. 764 * 765 * cd9660_pathconf(struct vnode *a_vp, int a_name, register_t *a_retval) 766 */ 767 static int 768 cd9660_pathconf(struct vop_pathconf_args *ap) 769 { 770 switch (ap->a_name) { 771 case _PC_LINK_MAX: 772 *ap->a_retval = 1; 773 return (0); 774 case _PC_NAME_MAX: 775 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 776 *ap->a_retval = NAME_MAX; 777 else 778 *ap->a_retval = 37; 779 return (0); 780 case _PC_PATH_MAX: 781 *ap->a_retval = PATH_MAX; 782 return (0); 783 case _PC_PIPE_BUF: 784 *ap->a_retval = PIPE_BUF; 785 return (0); 786 case _PC_CHOWN_RESTRICTED: 787 *ap->a_retval = 1; 788 return (0); 789 case _PC_NO_TRUNC: 790 *ap->a_retval = 1; 791 return (0); 792 default: 793 return (EINVAL); 794 } 795 /* NOTREACHED */ 796 } 797 798 /* 799 * get page routine 800 * 801 * XXX By default, wimp out... note that a_offset is ignored (and always 802 * XXX has been). 803 */ 804 int 805 cd9660_getpages(struct vop_getpages_args *ap) 806 { 807 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 808 ap->a_reqpage); 809 } 810 811 /* 812 * put page routine 813 * 814 * XXX By default, wimp out... note that a_offset is ignored (and always 815 * XXX has been). 816 */ 817 int 818 cd9660_putpages(struct vop_putpages_args *ap) 819 { 820 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 821 ap->a_sync, ap->a_rtvals); 822 } 823 824 /* 825 * Advisory lock support 826 */ 827 static int 828 cd9660_advlock(ap) 829 struct vop_advlock_args /* { 830 struct vnode *a_vp; 831 caddr_t a_id; 832 int a_op; 833 struct flock *a_fl; 834 int a_flags; 835 } */ *ap; 836 { 837 struct iso_node *ip = VTOI(ap->a_vp); 838 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size)); 839 } 840 841 842 /* 843 * Global vfs data structures for cd9660 844 */ 845 struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = { 846 { &vop_default_desc, (void *) vop_defaultop }, 847 { &vop_access_desc, (void *) cd9660_access }, 848 { &vop_advlock_desc, (void *) cd9660_advlock }, 849 { &vop_bmap_desc, (void *) cd9660_bmap }, 850 { &vop_cachedlookup_desc, (void *) cd9660_lookup }, 851 { &vop_getattr_desc, (void *) cd9660_getattr }, 852 { &vop_inactive_desc, (void *) cd9660_inactive }, 853 { &vop_ioctl_desc, (void *) cd9660_ioctl }, 854 { &vop_islocked_desc, (void *) vop_stdislocked }, 855 { &vop_lock_desc, (void *) vop_stdlock }, 856 { &vop_lookup_desc, (void *) vfs_cache_lookup }, 857 { &vop_pathconf_desc, (void *) cd9660_pathconf }, 858 { &vop_print_desc, (void *) cd9660_print }, 859 { &vop_read_desc, (void *) cd9660_read }, 860 { &vop_readdir_desc, (void *) cd9660_readdir }, 861 { &vop_readlink_desc, (void *) cd9660_readlink }, 862 { &vop_reclaim_desc, (void *) cd9660_reclaim }, 863 { &vop_setattr_desc, (void *) cd9660_setattr }, 864 { &vop_strategy_desc, (void *) cd9660_strategy }, 865 { &vop_unlock_desc, (void *) vop_stdunlock }, 866 { &vop_getpages_desc, (void *) cd9660_getpages }, 867 { &vop_putpages_desc, (void *) cd9660_putpages }, 868 { NULL, NULL } 869 }; 870 871 /* 872 * Special device vnode ops 873 */ 874 struct vnodeopv_entry_desc cd9660_specop_entries[] = { 875 { &vop_default_desc, (void *) spec_vnoperate }, 876 { &vop_access_desc, (void *) cd9660_access }, 877 { &vop_getattr_desc, (void *) cd9660_getattr }, 878 { &vop_inactive_desc, (void *) cd9660_inactive }, 879 { &vop_islocked_desc, (void *) vop_stdislocked }, 880 { &vop_lock_desc, (void *) vop_stdlock }, 881 { &vop_print_desc, (void *) cd9660_print }, 882 { &vop_reclaim_desc, (void *) cd9660_reclaim }, 883 { &vop_setattr_desc, (void *) cd9660_setattr }, 884 { &vop_unlock_desc, (void *) vop_stdunlock }, 885 { NULL, NULL } 886 }; 887 888 struct vnodeopv_entry_desc cd9660_fifoop_entries[] = { 889 { &vop_default_desc, (void *) fifo_vnoperate }, 890 { &vop_access_desc, (void *) cd9660_access }, 891 { &vop_getattr_desc, (void *) cd9660_getattr }, 892 { &vop_inactive_desc, (void *) cd9660_inactive }, 893 { &vop_islocked_desc, (void *) vop_stdislocked }, 894 { &vop_lock_desc, (void *) vop_stdlock }, 895 { &vop_print_desc, (void *) cd9660_print }, 896 { &vop_reclaim_desc, (void *) cd9660_reclaim }, 897 { &vop_setattr_desc, (void *) cd9660_setattr }, 898 { &vop_unlock_desc, (void *) vop_stdunlock }, 899 { NULL, NULL } 900 }; 901 902