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 1.27 2006/06/01 06:10:56 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 vnodeop_desc *a_desc, struct vnode *a_vp, 90 * struct vattr *a_vap, 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, struct thread *a_td) 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_rdev = 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 u_long *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, u_long *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 u_long *cookies = NULL; 479 480 dp = VTOI(vdp); 481 imp = dp->i_mnt; 482 bmask = imp->im_bmask; 483 484 MALLOC(idp, struct isoreaddir *, sizeof(*idp), M_TEMP, M_WAITOK); 485 idp->saveent.de.d_namlen = idp->assocent.de.d_namlen = 0; 486 /* 487 * XXX 488 * Is it worth trying to figure out the type? 489 */ 490 idp->saveent.de.d_type = DT_UNKNOWN; 491 idp->assocent.de.d_type = DT_UNKNOWN; 492 idp->current.de.d_type = DT_UNKNOWN; 493 idp->uio = uio; 494 if (ap->a_ncookies == NULL) { 495 idp->cookies = NULL; 496 } else { 497 /* 498 * Guess the number of cookies needed. Guess at least 499 * 1 to avoid a degenerate case in malloc, and cap at 500 * a reasonable limit. 501 */ 502 ncookies = uio->uio_resid / 16 + 1; 503 if (ncookies > 1024) 504 ncookies = 1024; 505 MALLOC(cookies, u_long *, ncookies * sizeof(u_int), 506 M_TEMP, M_WAITOK); 507 idp->cookies = cookies; 508 idp->ncookies = ncookies; 509 } 510 idp->eofflag = 1; 511 idp->curroff = uio->uio_offset; 512 513 if ((entryoffsetinblock = idp->curroff & bmask) && 514 (error = cd9660_devblkatoff(vdp, (off_t)idp->curroff, NULL, &bp))) { 515 FREE(idp, M_TEMP); 516 return (error); 517 } 518 endsearch = dp->i_size; 519 520 while (idp->curroff < endsearch) { 521 /* 522 * If offset is on a block boundary, 523 * read the next directory block. 524 * Release previous if it exists. 525 */ 526 if ((idp->curroff & bmask) == 0) { 527 if (bp != NULL) 528 brelse(bp); 529 if ((error = 530 cd9660_devblkatoff(vdp, (off_t)idp->curroff, NULL, &bp)) != 0) 531 break; 532 entryoffsetinblock = 0; 533 } 534 /* 535 * Get pointer to next entry. 536 */ 537 ep = (struct iso_directory_record *) 538 ((char *)bp->b_data + entryoffsetinblock); 539 540 reclen = isonum_711(ep->length); 541 if (reclen == 0) { 542 /* skip to next block, if any */ 543 idp->curroff = 544 (idp->curroff & ~bmask) + imp->logical_block_size; 545 continue; 546 } 547 548 if (reclen < ISO_DIRECTORY_RECORD_SIZE) { 549 error = EINVAL; 550 /* illegal entry, stop */ 551 break; 552 } 553 554 if (entryoffsetinblock + reclen > imp->logical_block_size) { 555 error = EINVAL; 556 /* illegal directory, so stop looking */ 557 break; 558 } 559 560 idp->current.de.d_namlen = isonum_711(ep->name_len); 561 562 if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.de.d_namlen) { 563 error = EINVAL; 564 /* illegal entry, stop */ 565 break; 566 } 567 568 if (isonum_711(ep->flags)&2) 569 idp->current.de.d_ino = isodirino(ep, imp); 570 else 571 idp->current.de.d_ino = bp->b_bio1.bio_offset + 572 entryoffsetinblock; 573 574 idp->curroff += reclen; 575 576 switch (imp->iso_ftype) { 577 case ISO_FTYPE_RRIP: 578 { 579 ino_t cur_fileno = idp->current.de.d_ino; 580 cd9660_rrip_getname(ep,idp->current.de.d_name, &namelen, 581 &cur_fileno,imp); 582 idp->current.de.d_ino = cur_fileno; 583 idp->current.de.d_namlen = namelen; 584 if (idp->current.de.d_namlen) 585 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 586 break; 587 } 588 default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 || ISO_FTYPE_HIGH_SIERRA*/ 589 strcpy(idp->current.de.d_name,".."); 590 if (idp->current.de.d_namlen == 1 && ep->name[0] == 0) { 591 idp->current.de.d_namlen = 1; 592 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 593 } else if (idp->current.de.d_namlen == 1 && ep->name[0] == 1) { 594 idp->current.de.d_namlen = 2; 595 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 596 } else { 597 isofntrans(ep->name,idp->current.de.d_namlen, 598 idp->current.de.d_name, &namelen, 599 imp->iso_ftype == ISO_FTYPE_9660, 600 isonum_711(ep->flags)&4, 601 imp->joliet_level); 602 idp->current.de.d_namlen = namelen; 603 if (imp->iso_ftype == ISO_FTYPE_DEFAULT) 604 error = iso_shipdir(idp); 605 else 606 error = iso_uiodir(idp,&idp->current.de,idp->curroff); 607 } 608 } 609 if (error) 610 break; 611 612 entryoffsetinblock += reclen; 613 } 614 615 if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) { 616 idp->current.de.d_namlen = 0; 617 error = iso_shipdir(idp); 618 } 619 if (error < 0) 620 error = 0; 621 622 if (ap->a_ncookies != NULL) { 623 if (error) 624 free(cookies, M_TEMP); 625 else { 626 /* 627 * Work out the number of cookies actually used. 628 */ 629 *ap->a_ncookies = ncookies - idp->ncookies; 630 *ap->a_cookies = cookies; 631 } 632 } 633 634 if (bp) 635 brelse (bp); 636 637 uio->uio_offset = idp->uio_off; 638 *ap->a_eofflag = idp->eofflag; 639 640 FREE(idp, M_TEMP); 641 642 return (error); 643 } 644 645 /* 646 * Return target name of a symbolic link 647 * Shouldn't we get the parent vnode and read the data from there? 648 * This could eventually result in deadlocks in cd9660_lookup. 649 * But otherwise the block read here is in the block buffer two times. 650 */ 651 typedef struct iso_directory_record ISODIR; 652 typedef struct iso_node ISONODE; 653 typedef struct iso_mnt ISOMNT; 654 /* 655 * cd9660_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) 656 */ 657 static int 658 cd9660_readlink(struct vop_readlink_args *ap) 659 { 660 ISONODE *ip; 661 ISODIR *dirp; 662 ISOMNT *imp; 663 struct buf *bp; 664 struct uio *uio; 665 u_short symlen; 666 int error; 667 char *symname; 668 669 ip = VTOI(ap->a_vp); 670 imp = ip->i_mnt; 671 uio = ap->a_uio; 672 673 if (imp->iso_ftype != ISO_FTYPE_RRIP) 674 return (EINVAL); 675 676 /* 677 * Get parents directory record block that this inode included. 678 */ 679 error = bread(imp->im_devvp, 680 (off_t)ip->i_number & ~((1 << imp->im_bshift) - 1), 681 imp->logical_block_size, &bp); 682 if (error) { 683 brelse(bp); 684 return (EINVAL); 685 } 686 687 /* 688 * Setup the directory pointer for this inode 689 */ 690 dirp = (ISODIR *)(bp->b_data + (ip->i_number & imp->im_bmask)); 691 692 /* 693 * Just make sure, we have a right one.... 694 * 1: Check not cross boundary on block 695 */ 696 if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length) 697 > (unsigned)imp->logical_block_size) { 698 brelse(bp); 699 return (EINVAL); 700 } 701 702 /* 703 * Now get a buffer 704 * Abuse a namei buffer for now. 705 */ 706 if (uio->uio_segflg == UIO_SYSSPACE) 707 symname = uio->uio_iov->iov_base; 708 else 709 symname = objcache_get(namei_oc, M_WAITOK); 710 711 /* 712 * Ok, we just gathering a symbolic name in SL record. 713 */ 714 if (cd9660_rrip_getsymname(dirp, symname, &symlen, imp) == 0) { 715 if (uio->uio_segflg != UIO_SYSSPACE) 716 objcache_put(namei_oc, symname); 717 brelse(bp); 718 return (EINVAL); 719 } 720 /* 721 * Don't forget before you leave from home ;-) 722 */ 723 brelse(bp); 724 725 /* 726 * return with the symbolic name to caller's. 727 */ 728 if (uio->uio_segflg != UIO_SYSSPACE) { 729 error = uiomove(symname, symlen, uio); 730 objcache_put(namei_oc, symname); 731 return (error); 732 } 733 uio->uio_resid -= symlen; 734 uio->uio_iov->iov_base += symlen; 735 uio->uio_iov->iov_len -= symlen; 736 return (0); 737 } 738 739 /* 740 * Calculate the logical to physical mapping if not done already, 741 * then call the device strategy routine. 742 * 743 * cd9660_strategy(struct buf *a_vp, struct buf *a_bio) 744 */ 745 static int 746 cd9660_strategy(struct vop_strategy_args *ap) 747 { 748 struct bio *bio = ap->a_bio; 749 struct bio *nbio; 750 struct buf *bp = bio->bio_buf; 751 struct vnode *vp = ap->a_vp; 752 struct iso_node *ip; 753 int error; 754 755 ip = VTOI(vp); 756 if (vp->v_type == VBLK || vp->v_type == VCHR) 757 panic("cd9660_strategy: spec"); 758 nbio = push_bio(bio); 759 if (nbio->bio_offset == NOOFFSET) { 760 error = VOP_BMAP(vp, bio->bio_offset, NULL, 761 &nbio->bio_offset, NULL, NULL); 762 if (error) { 763 bp->b_error = error; 764 bp->b_flags |= B_ERROR; 765 /* I/O was never started on nbio, must biodone(bio) */ 766 biodone(bio); 767 return (error); 768 } 769 if (nbio->bio_offset == NOOFFSET) 770 clrbuf(bp); 771 } 772 if (nbio->bio_offset == NOOFFSET) { 773 /* I/O was never started on nbio, must biodone(bio) */ 774 biodone(bio); 775 return (0); 776 } 777 vp = ip->i_devvp; 778 vn_strategy(vp, nbio); 779 return (0); 780 } 781 782 /* 783 * Print out the contents of an inode. 784 * 785 * cd9660_print(struct vnode *a_vp) 786 */ 787 static int 788 cd9660_print(struct vop_print_args *ap) 789 { 790 printf("tag VT_ISOFS, isofs vnode\n"); 791 return (0); 792 } 793 794 /* 795 * Return POSIX pathconf information applicable to cd9660 filesystems. 796 * 797 * cd9660_pathconf(struct vnode *a_vp, int a_name, register_t *a_retval) 798 */ 799 static int 800 cd9660_pathconf(struct vop_pathconf_args *ap) 801 { 802 switch (ap->a_name) { 803 case _PC_LINK_MAX: 804 *ap->a_retval = 1; 805 return (0); 806 case _PC_NAME_MAX: 807 if (VTOI(ap->a_vp)->i_mnt->iso_ftype == ISO_FTYPE_RRIP) 808 *ap->a_retval = NAME_MAX; 809 else 810 *ap->a_retval = 37; 811 return (0); 812 case _PC_PATH_MAX: 813 *ap->a_retval = PATH_MAX; 814 return (0); 815 case _PC_PIPE_BUF: 816 *ap->a_retval = PIPE_BUF; 817 return (0); 818 case _PC_CHOWN_RESTRICTED: 819 *ap->a_retval = 1; 820 return (0); 821 case _PC_NO_TRUNC: 822 *ap->a_retval = 1; 823 return (0); 824 default: 825 return (EINVAL); 826 } 827 /* NOTREACHED */ 828 } 829 830 /* 831 * get page routine 832 * 833 * XXX By default, wimp out... note that a_offset is ignored (and always 834 * XXX has been). 835 */ 836 int 837 cd9660_getpages(struct vop_getpages_args *ap) 838 { 839 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, 840 ap->a_reqpage); 841 } 842 843 /* 844 * put page routine 845 * 846 * XXX By default, wimp out... note that a_offset is ignored (and always 847 * XXX has been). 848 */ 849 int 850 cd9660_putpages(struct vop_putpages_args *ap) 851 { 852 return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, 853 ap->a_sync, ap->a_rtvals); 854 } 855 856 /* 857 * Advisory lock support 858 */ 859 static int 860 cd9660_advlock(struct vop_advlock_args *ap) 861 { 862 struct iso_node *ip = VTOI(ap->a_vp); 863 return (lf_advlock(ap, &(ip->i_lockf), ip->i_size)); 864 } 865 866 867 /* 868 * Global vfs data structures for cd9660 869 */ 870 struct vnodeopv_entry_desc cd9660_vnodeop_entries[] = { 871 { &vop_default_desc, (vnodeopv_entry_t) vop_defaultop }, 872 { &vop_open_desc, (vnodeopv_entry_t) cd9660_open}, 873 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access }, 874 { &vop_advlock_desc, (vnodeopv_entry_t) cd9660_advlock }, 875 { &vop_bmap_desc, (vnodeopv_entry_t) cd9660_bmap }, 876 { &vop_old_lookup_desc, (vnodeopv_entry_t) cd9660_lookup }, 877 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr }, 878 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive }, 879 { &vop_ioctl_desc, (vnodeopv_entry_t) cd9660_ioctl }, 880 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, 881 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, 882 { &vop_pathconf_desc, (vnodeopv_entry_t) cd9660_pathconf }, 883 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print }, 884 { &vop_read_desc, (vnodeopv_entry_t) cd9660_read }, 885 { &vop_readdir_desc, (vnodeopv_entry_t) cd9660_readdir }, 886 { &vop_readlink_desc, (vnodeopv_entry_t) cd9660_readlink }, 887 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim }, 888 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr }, 889 { &vop_strategy_desc, (vnodeopv_entry_t) cd9660_strategy }, 890 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, 891 { &vop_getpages_desc, (vnodeopv_entry_t) cd9660_getpages }, 892 { &vop_putpages_desc, (vnodeopv_entry_t) cd9660_putpages }, 893 { NULL, NULL } 894 }; 895 896 /* 897 * Special device vnode ops 898 */ 899 struct vnodeopv_entry_desc cd9660_specop_entries[] = { 900 { &vop_default_desc, (vnodeopv_entry_t) spec_vnoperate }, 901 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access }, 902 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr }, 903 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive }, 904 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, 905 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, 906 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print }, 907 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim }, 908 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr }, 909 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, 910 { NULL, NULL } 911 }; 912 913 struct vnodeopv_entry_desc cd9660_fifoop_entries[] = { 914 { &vop_default_desc, (vnodeopv_entry_t) fifo_vnoperate }, 915 { &vop_access_desc, (vnodeopv_entry_t) cd9660_access }, 916 { &vop_getattr_desc, (vnodeopv_entry_t) cd9660_getattr }, 917 { &vop_inactive_desc, (vnodeopv_entry_t) cd9660_inactive }, 918 { &vop_islocked_desc, (vnodeopv_entry_t) vop_stdislocked }, 919 { &vop_lock_desc, (vnodeopv_entry_t) vop_stdlock }, 920 { &vop_print_desc, (vnodeopv_entry_t) cd9660_print }, 921 { &vop_reclaim_desc, (vnodeopv_entry_t) cd9660_reclaim }, 922 { &vop_setattr_desc, (vnodeopv_entry_t) cd9660_setattr }, 923 { &vop_unlock_desc, (vnodeopv_entry_t) vop_stdunlock }, 924 { NULL, NULL } 925 }; 926 927