sys/vfs/isofs/cd9660/cd9660_vnops.c

   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 1.40 2008/06/19 23:27:39 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 = (char *)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, bp->b_cmd);
 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