| 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_vfsops.c 8.18 (Berkeley) 5/22/95 |
| 39 | * $FreeBSD: src/sys/isofs/cd9660/cd9660_vfsops.c,v 1.74.2.7 2002/04/08 09:39:29 bde Exp $ |
| 40 | * $DragonFly: src/sys/vfs/isofs/cd9660/cd9660_vfsops.c,v 1.46 2008/09/17 21:44:23 dillon Exp $ |
| 41 | */ |
| 42 | |
| 43 | #include <sys/param.h> |
| 44 | #include <sys/systm.h> |
| 45 | #include <sys/proc.h> |
| 46 | #include <sys/priv.h> |
| 47 | #include <sys/nlookup.h> |
| 48 | #include <sys/kernel.h> |
| 49 | #include <sys/vnode.h> |
| 50 | #include <sys/mount.h> |
| 51 | #include <sys/buf.h> |
| 52 | #include <sys/cdio.h> |
| 53 | #include <sys/conf.h> |
| 54 | #include <sys/fcntl.h> |
| 55 | #include <sys/malloc.h> |
| 56 | #include <sys/stat.h> |
| 57 | #include <sys/syslog.h> |
| 58 | #include <sys/iconv.h> |
| 59 | |
| 60 | #include <vm/vm_zone.h> |
| 61 | |
| 62 | #include "iso.h" |
| 63 | #include "iso_rrip.h" |
| 64 | #include "cd9660_node.h" |
| 65 | #include "cd9660_mount.h" |
| 66 | |
| 67 | extern struct vop_ops cd9660_vnode_vops; |
| 68 | extern struct vop_ops cd9660_spec_vops; |
| 69 | extern struct vop_ops cd9660_fifo_vops; |
| 70 | |
| 71 | MALLOC_DEFINE(M_ISOFSMNT, "ISOFS mount", "ISOFS mount structure"); |
| 72 | MALLOC_DEFINE(M_ISOFSNODE, "ISOFS node", "ISOFS vnode private part"); |
| 73 | |
| 74 | struct iconv_functions *cd9660_iconv = NULL; |
| 75 | |
| 76 | static int cd9660_mount (struct mount *, char *, caddr_t, struct ucred *); |
| 77 | static int cd9660_unmount (struct mount *, int); |
| 78 | static int cd9660_root (struct mount *, struct vnode **); |
| 79 | static int cd9660_statfs (struct mount *, struct statfs *, struct ucred *); |
| 80 | static int cd9660_vget (struct mount *, struct vnode *, ino_t, struct vnode **); |
| 81 | static int cd9660_fhtovp (struct mount *, struct vnode *rootvp, |
| 82 | struct fid *, struct vnode **); |
| 83 | static int cd9660_checkexp (struct mount *, struct sockaddr *, |
| 84 | int *, struct ucred **); |
| 85 | static int cd9660_vptofh (struct vnode *, struct fid *); |
| 86 | |
| 87 | static struct vfsops cd9660_vfsops = { |
| 88 | .vfs_mount = cd9660_mount, |
| 89 | .vfs_unmount = cd9660_unmount, |
| 90 | .vfs_root = cd9660_root, |
| 91 | .vfs_statfs = cd9660_statfs, |
| 92 | .vfs_sync = vfs_stdsync, |
| 93 | .vfs_vget = cd9660_vget, |
| 94 | .vfs_fhtovp = cd9660_fhtovp, |
| 95 | .vfs_checkexp = cd9660_checkexp, |
| 96 | .vfs_vptofh = cd9660_vptofh, |
| 97 | .vfs_init = cd9660_init, |
| 98 | .vfs_uninit = cd9660_uninit, |
| 99 | }; |
| 100 | VFS_SET(cd9660_vfsops, cd9660, VFCF_READONLY); |
| 101 | MODULE_VERSION(cd9660, 1); |
| 102 | |
| 103 | |
| 104 | /* |
| 105 | * Called by vfs_mountroot when iso is going to be mounted as root. |
| 106 | */ |
| 107 | |
| 108 | static int iso_get_ssector (cdev_t dev); |
| 109 | static int iso_mountfs (struct vnode *devvp, struct mount *mp, |
| 110 | struct iso_args *argp); |
| 111 | |
| 112 | /* |
| 113 | * Try to find the start of the last data track on this CD-ROM. This |
| 114 | * is used to mount the last session of a multi-session CD. Bail out |
| 115 | * and return 0 if we fail, this is always a safe bet. |
| 116 | */ |
| 117 | static int |
| 118 | iso_get_ssector(cdev_t dev) |
| 119 | { |
| 120 | struct ioc_toc_header h; |
| 121 | struct ioc_read_toc_single_entry t; |
| 122 | int i; |
| 123 | |
| 124 | if (dev_dioctl(dev, CDIOREADTOCHEADER, (caddr_t)&h, FREAD, |
| 125 | proc0.p_ucred, NULL) != 0) |
| 126 | return 0; |
| 127 | |
| 128 | for (i = h.ending_track; i >= 0; i--) { |
| 129 | t.address_format = CD_LBA_FORMAT; |
| 130 | t.track = i; |
| 131 | if (dev_dioctl(dev, CDIOREADTOCENTRY, (caddr_t)&t, FREAD, |
| 132 | proc0.p_ucred, NULL) != 0) { |
| 133 | return 0; |
| 134 | } |
| 135 | if ((t.entry.control & 4) != 0) |
| 136 | /* found a data track */ |
| 137 | break; |
| 138 | } |
| 139 | |
| 140 | if (i < 0) |
| 141 | return 0; |
| 142 | |
| 143 | return ntohl(t.entry.addr.lba); |
| 144 | } |
| 145 | |
| 146 | static int |
| 147 | iso_mountroot(struct mount *mp) |
| 148 | { |
| 149 | struct iso_args args; |
| 150 | struct vnode *rootvp; |
| 151 | int error; |
| 152 | |
| 153 | if ((error = bdevvp(rootdev, &rootvp))) { |
| 154 | kprintf("iso_mountroot: can't find rootvp\n"); |
| 155 | return (error); |
| 156 | } |
| 157 | args.flags = ISOFSMNT_ROOT; |
| 158 | |
| 159 | vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY); |
| 160 | error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL); |
| 161 | vn_unlock(rootvp); |
| 162 | if (error) |
| 163 | return (error); |
| 164 | |
| 165 | args.ssector = iso_get_ssector(rootdev); |
| 166 | |
| 167 | VOP_CLOSE(rootvp, FREAD); |
| 168 | |
| 169 | if (bootverbose) |
| 170 | kprintf("iso_mountroot(): using session at block %d\n", |
| 171 | args.ssector); |
| 172 | if ((error = iso_mountfs(rootvp, mp, &args)) != 0) |
| 173 | return (error); |
| 174 | |
| 175 | cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred); |
| 176 | return (0); |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * VFS Operations. |
| 181 | * |
| 182 | * mount system call |
| 183 | */ |
| 184 | static int |
| 185 | cd9660_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) |
| 186 | { |
| 187 | struct vnode *devvp; |
| 188 | struct iso_args args; |
| 189 | size_t size; |
| 190 | int error; |
| 191 | mode_t accessmode; |
| 192 | struct iso_mnt *imp = 0; |
| 193 | struct nlookupdata nd; |
| 194 | |
| 195 | if ((mp->mnt_flag & (MNT_ROOTFS|MNT_UPDATE)) == MNT_ROOTFS) { |
| 196 | return (iso_mountroot(mp)); |
| 197 | } |
| 198 | if ((error = copyin(data, (caddr_t)&args, sizeof (struct iso_args)))) |
| 199 | return (error); |
| 200 | |
| 201 | if ((mp->mnt_flag & MNT_RDONLY) == 0) |
| 202 | return (EROFS); |
| 203 | |
| 204 | /* |
| 205 | * If updating, check whether changing from read-only to |
| 206 | * read/write; if there is no device name, that's all we do. |
| 207 | */ |
| 208 | if (mp->mnt_flag & MNT_UPDATE) { |
| 209 | imp = VFSTOISOFS(mp); |
| 210 | if (args.fspec == 0) |
| 211 | return (vfs_export(mp, &imp->im_export, &args.export)); |
| 212 | } |
| 213 | /* |
| 214 | * Not an update, or updating the name: look up the name |
| 215 | * and verify that it refers to a sensible block device. |
| 216 | */ |
| 217 | devvp = NULL; |
| 218 | error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); |
| 219 | if (error == 0) |
| 220 | error = nlookup(&nd); |
| 221 | if (error == 0) |
| 222 | error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); |
| 223 | nlookup_done(&nd); |
| 224 | if (error) |
| 225 | return (error); |
| 226 | |
| 227 | if (!vn_isdisk(devvp, &error)) { |
| 228 | vrele(devvp); |
| 229 | return (error); |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * Verify that user has necessary permissions on the device, |
| 234 | * or has superuser abilities |
| 235 | */ |
| 236 | accessmode = VREAD; |
| 237 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 238 | error = VOP_EACCESS(devvp, accessmode, cred); |
| 239 | if (error) |
| 240 | error = priv_check_cred(cred, PRIV_ROOT, 0); |
| 241 | if (error) { |
| 242 | vput(devvp); |
| 243 | return (error); |
| 244 | } |
| 245 | vn_unlock(devvp); |
| 246 | |
| 247 | if ((mp->mnt_flag & MNT_UPDATE) == 0) { |
| 248 | error = iso_mountfs(devvp, mp, &args); |
| 249 | } else { |
| 250 | if (devvp != imp->im_devvp) |
| 251 | error = EINVAL; /* needs translation */ |
| 252 | else |
| 253 | vrele(devvp); |
| 254 | } |
| 255 | if (error) { |
| 256 | vrele(devvp); |
| 257 | return error; |
| 258 | } |
| 259 | imp = VFSTOISOFS(mp); |
| 260 | copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
| 261 | &size); |
| 262 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); |
| 263 | cd9660_statfs(mp, &mp->mnt_stat, cred); |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | /* |
| 268 | * Common code for mount and mountroot |
| 269 | */ |
| 270 | static int |
| 271 | iso_mountfs(struct vnode *devvp, struct mount *mp, struct iso_args *argp) |
| 272 | { |
| 273 | struct iso_mnt *isomp = NULL; |
| 274 | struct buf *bp = NULL; |
| 275 | struct buf *pribp = NULL, *supbp = NULL; |
| 276 | cdev_t dev; |
| 277 | int error = EINVAL; |
| 278 | int needclose = 0; |
| 279 | int high_sierra = 0; |
| 280 | int iso_bsize; |
| 281 | int iso_blknum; |
| 282 | int joliet_level; |
| 283 | struct iso_volume_descriptor *vdp = 0; |
| 284 | struct iso_primary_descriptor *pri = NULL; |
| 285 | struct iso_sierra_primary_descriptor *pri_sierra = NULL; |
| 286 | struct iso_supplementary_descriptor *sup = NULL; |
| 287 | struct iso_directory_record *rootp; |
| 288 | int logical_block_size; |
| 289 | char cs_local[ICONV_CSNMAXLEN]; |
| 290 | char cs_disk[ICONV_CSNMAXLEN]; |
| 291 | |
| 292 | if (!(mp->mnt_flag & MNT_RDONLY)) |
| 293 | return EROFS; |
| 294 | |
| 295 | /* |
| 296 | * Disallow multiple mounts of the same device. |
| 297 | * Disallow mounting of a device that is currently in use |
| 298 | * Flush out any old buffers remaining from a previous use. |
| 299 | */ |
| 300 | if ((error = vfs_mountedon(devvp))) |
| 301 | return error; |
| 302 | if (vcount(devvp) > 0) |
| 303 | return EBUSY; |
| 304 | if ((error = vinvalbuf(devvp, V_SAVE, 0, 0))) |
| 305 | return (error); |
| 306 | |
| 307 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 308 | error = VOP_OPEN(devvp, FREAD, FSCRED, NULL); |
| 309 | vn_unlock(devvp); |
| 310 | if (error) |
| 311 | return error; |
| 312 | dev = devvp->v_rdev; |
| 313 | if (dev->si_iosize_max != 0) |
| 314 | mp->mnt_iosize_max = dev->si_iosize_max; |
| 315 | if (mp->mnt_iosize_max > MAXPHYS) |
| 316 | mp->mnt_iosize_max = MAXPHYS; |
| 317 | |
| 318 | needclose = 1; |
| 319 | |
| 320 | /* This is the "logical sector size". The standard says this |
| 321 | * should be 2048 or the physical sector size on the device, |
| 322 | * whichever is greater. For now, we'll just use a constant. |
| 323 | */ |
| 324 | iso_bsize = ISO_DEFAULT_BLOCK_SIZE; |
| 325 | |
| 326 | joliet_level = 0; |
| 327 | for (iso_blknum = 16 + argp->ssector; |
| 328 | iso_blknum < 100 + argp->ssector; |
| 329 | iso_blknum++) { |
| 330 | if ((error = bread(devvp, (off_t)iso_blknum * iso_bsize, |
| 331 | iso_bsize, &bp)) != 0) |
| 332 | goto out; |
| 333 | |
| 334 | vdp = (struct iso_volume_descriptor *)bp->b_data; |
| 335 | if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { |
| 336 | if (bcmp (vdp->id_sierra, ISO_SIERRA_ID, |
| 337 | sizeof vdp->id) != 0) { |
| 338 | error = EINVAL; |
| 339 | goto out; |
| 340 | } else |
| 341 | high_sierra = 1; |
| 342 | } |
| 343 | switch (isonum_711 (high_sierra? vdp->type_sierra: vdp->type)){ |
| 344 | case ISO_VD_PRIMARY: |
| 345 | if (pribp == NULL) { |
| 346 | pribp = bp; |
| 347 | bp = NULL; |
| 348 | pri = (struct iso_primary_descriptor *)vdp; |
| 349 | pri_sierra = |
| 350 | (struct iso_sierra_primary_descriptor *)vdp; |
| 351 | } |
| 352 | break; |
| 353 | |
| 354 | case ISO_VD_SUPPLEMENTARY: |
| 355 | if (supbp == NULL) { |
| 356 | supbp = bp; |
| 357 | bp = NULL; |
| 358 | sup = (struct iso_supplementary_descriptor *)vdp; |
| 359 | |
| 360 | if (!(argp->flags & ISOFSMNT_NOJOLIET)) { |
| 361 | if (bcmp(sup->escape, "%/@", 3) == 0) |
| 362 | joliet_level = 1; |
| 363 | if (bcmp(sup->escape, "%/C", 3) == 0) |
| 364 | joliet_level = 2; |
| 365 | if (bcmp(sup->escape, "%/E", 3) == 0) |
| 366 | joliet_level = 3; |
| 367 | |
| 368 | if ((isonum_711 (sup->flags) & 1) && |
| 369 | (argp->flags & ISOFSMNT_BROKENJOLIET) == 0) |
| 370 | joliet_level = 0; |
| 371 | } |
| 372 | } |
| 373 | break; |
| 374 | |
| 375 | case ISO_VD_END: |
| 376 | goto vd_end; |
| 377 | |
| 378 | default: |
| 379 | break; |
| 380 | } |
| 381 | if (bp) { |
| 382 | brelse(bp); |
| 383 | bp = NULL; |
| 384 | } |
| 385 | } |
| 386 | vd_end: |
| 387 | if (bp) { |
| 388 | brelse(bp); |
| 389 | bp = NULL; |
| 390 | } |
| 391 | |
| 392 | if (pri == NULL) { |
| 393 | error = EINVAL; |
| 394 | goto out; |
| 395 | } |
| 396 | |
| 397 | logical_block_size = |
| 398 | isonum_723 (high_sierra? |
| 399 | pri_sierra->logical_block_size: |
| 400 | pri->logical_block_size); |
| 401 | |
| 402 | if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE |
| 403 | || (logical_block_size & (logical_block_size - 1)) != 0) { |
| 404 | error = EINVAL; |
| 405 | goto out; |
| 406 | } |
| 407 | |
| 408 | rootp = (struct iso_directory_record *) |
| 409 | (high_sierra? |
| 410 | pri_sierra->root_directory_record: |
| 411 | pri->root_directory_record); |
| 412 | |
| 413 | isomp = kmalloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK | M_ZERO); |
| 414 | isomp->logical_block_size = logical_block_size; |
| 415 | isomp->volume_space_size = |
| 416 | isonum_733 (high_sierra? |
| 417 | pri_sierra->volume_space_size: |
| 418 | pri->volume_space_size); |
| 419 | isomp->joliet_level = 0; |
| 420 | /* |
| 421 | * Since an ISO9660 multi-session CD can also access previous |
| 422 | * sessions, we have to include them into the space consider- |
| 423 | * ations. This doesn't yield a very accurate number since |
| 424 | * parts of the old sessions might be inaccessible now, but we |
| 425 | * can't do much better. This is also important for the NFS |
| 426 | * filehandle validation. |
| 427 | */ |
| 428 | isomp->volume_space_size += argp->ssector; |
| 429 | bcopy (rootp, isomp->root, sizeof isomp->root); |
| 430 | isomp->root_extent = isonum_733 (rootp->extent); |
| 431 | isomp->root_size = isonum_733 (rootp->size); |
| 432 | |
| 433 | isomp->im_bmask = logical_block_size - 1; |
| 434 | isomp->im_bshift = ffs(logical_block_size) - 1; |
| 435 | |
| 436 | pribp->b_flags |= B_AGE; |
| 437 | brelse(pribp); |
| 438 | pribp = NULL; |
| 439 | |
| 440 | mp->mnt_data = (qaddr_t)isomp; |
| 441 | mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); |
| 442 | mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; |
| 443 | mp->mnt_maxsymlinklen = 0; |
| 444 | mp->mnt_flag |= MNT_LOCAL; |
| 445 | isomp->im_mountp = mp; |
| 446 | isomp->im_dev = dev; |
| 447 | isomp->im_devvp = devvp; |
| 448 | |
| 449 | dev->si_mountpoint = mp; |
| 450 | |
| 451 | /* Check the Rock Ridge Extention support */ |
| 452 | if (!(argp->flags & ISOFSMNT_NORRIP)) { |
| 453 | if ((error = bread(isomp->im_devvp, |
| 454 | lblktooff(isomp, isomp->root_extent + isonum_711(rootp->ext_attr_length)), |
| 455 | isomp->logical_block_size, &bp)) != 0) |
| 456 | goto out; |
| 457 | |
| 458 | rootp = (struct iso_directory_record *)bp->b_data; |
| 459 | |
| 460 | if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { |
| 461 | argp->flags |= ISOFSMNT_NORRIP; |
| 462 | } else { |
| 463 | argp->flags &= ~ISOFSMNT_GENS; |
| 464 | } |
| 465 | |
| 466 | /* |
| 467 | * The contents are valid, |
| 468 | * but they will get reread as part of another vnode, so... |
| 469 | */ |
| 470 | bp->b_flags |= B_AGE; |
| 471 | brelse(bp); |
| 472 | bp = NULL; |
| 473 | } |
| 474 | isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | |
| 475 | ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | |
| 476 | ISOFSMNT_KICONV); |
| 477 | if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { |
| 478 | bcopy(argp->cs_local, cs_local, sizeof(cs_local)); |
| 479 | bcopy(argp->cs_disk, cs_disk, sizeof(cs_disk)); |
| 480 | cd9660_iconv->open(cs_local, cs_disk, &isomp->im_d2l); |
| 481 | cd9660_iconv->open(cs_disk, cs_local, &isomp->im_l2d); |
| 482 | } else { |
| 483 | isomp->im_d2l = NULL; |
| 484 | isomp->im_l2d = NULL; |
| 485 | } |
| 486 | |
| 487 | if (high_sierra) { |
| 488 | /* this effectively ignores all the mount flags */ |
| 489 | log(LOG_INFO, "cd9660: High Sierra Format\n"); |
| 490 | isomp->iso_ftype = ISO_FTYPE_HIGH_SIERRA; |
| 491 | } else { |
| 492 | switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { |
| 493 | default: |
| 494 | isomp->iso_ftype = ISO_FTYPE_DEFAULT; |
| 495 | break; |
| 496 | case ISOFSMNT_GENS|ISOFSMNT_NORRIP: |
| 497 | isomp->iso_ftype = ISO_FTYPE_9660; |
| 498 | break; |
| 499 | case 0: |
| 500 | log(LOG_INFO, "cd9660: RockRidge Extension\n"); |
| 501 | isomp->iso_ftype = ISO_FTYPE_RRIP; |
| 502 | break; |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | /* Decide whether to use the Joliet descriptor */ |
| 507 | |
| 508 | if (isomp->iso_ftype != ISO_FTYPE_RRIP && joliet_level) { |
| 509 | log(LOG_INFO, "cd9660: Joliet Extension (Level %d)\n", joliet_level); |
| 510 | rootp = (struct iso_directory_record *) |
| 511 | sup->root_directory_record; |
| 512 | bcopy (rootp, isomp->root, sizeof isomp->root); |
| 513 | isomp->root_extent = isonum_733 (rootp->extent); |
| 514 | isomp->root_size = isonum_733 (rootp->size); |
| 515 | isomp->joliet_level = joliet_level; |
| 516 | supbp->b_flags |= B_AGE; |
| 517 | } |
| 518 | |
| 519 | if (supbp) { |
| 520 | brelse(supbp); |
| 521 | supbp = NULL; |
| 522 | } |
| 523 | |
| 524 | vfs_add_vnodeops(mp, &cd9660_vnode_vops, &mp->mnt_vn_norm_ops); |
| 525 | vfs_add_vnodeops(mp, &cd9660_spec_vops, &mp->mnt_vn_spec_ops); |
| 526 | vfs_add_vnodeops(mp, &cd9660_fifo_vops, &mp->mnt_vn_fifo_ops); |
| 527 | |
| 528 | return 0; |
| 529 | out: |
| 530 | dev->si_mountpoint = NULL; |
| 531 | if (bp) |
| 532 | brelse(bp); |
| 533 | if (pribp) |
| 534 | brelse(pribp); |
| 535 | if (supbp) |
| 536 | brelse(supbp); |
| 537 | if (needclose) |
| 538 | VOP_CLOSE(devvp, FREAD); |
| 539 | if (isomp) { |
| 540 | kfree((caddr_t)isomp, M_ISOFSMNT); |
| 541 | mp->mnt_data = (qaddr_t)0; |
| 542 | } |
| 543 | return error; |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * unmount system call |
| 548 | */ |
| 549 | static int |
| 550 | cd9660_unmount(struct mount *mp, int mntflags) |
| 551 | { |
| 552 | struct iso_mnt *isomp; |
| 553 | int error, flags = 0; |
| 554 | |
| 555 | if (mntflags & MNT_FORCE) |
| 556 | flags |= FORCECLOSE; |
| 557 | #if 0 |
| 558 | mntflushbuf(mp, 0); |
| 559 | if (mntinvalbuf(mp)) |
| 560 | return EBUSY; |
| 561 | #endif |
| 562 | if ((error = vflush(mp, 0, flags))) |
| 563 | return (error); |
| 564 | |
| 565 | isomp = VFSTOISOFS(mp); |
| 566 | |
| 567 | if (isomp->im_flags & ISOFSMNT_KICONV && cd9660_iconv) { |
| 568 | if (isomp->im_d2l) |
| 569 | cd9660_iconv->close(isomp->im_d2l); |
| 570 | if (isomp->im_l2d) |
| 571 | cd9660_iconv->close(isomp->im_l2d); |
| 572 | } |
| 573 | |
| 574 | isomp->im_devvp->v_rdev->si_mountpoint = NULL; |
| 575 | error = VOP_CLOSE(isomp->im_devvp, FREAD); |
| 576 | vrele(isomp->im_devvp); |
| 577 | kfree((caddr_t)isomp, M_ISOFSMNT); |
| 578 | mp->mnt_data = (qaddr_t)0; |
| 579 | mp->mnt_flag &= ~MNT_LOCAL; |
| 580 | return (error); |
| 581 | } |
| 582 | |
| 583 | /* |
| 584 | * Return root of a filesystem |
| 585 | */ |
| 586 | static int |
| 587 | cd9660_root(struct mount *mp, struct vnode **vpp) |
| 588 | { |
| 589 | struct iso_mnt *imp = VFSTOISOFS(mp); |
| 590 | struct iso_directory_record *dp = |
| 591 | (struct iso_directory_record *)imp->root; |
| 592 | ino_t ino = isodirino(dp, imp); |
| 593 | |
| 594 | /* |
| 595 | * With RRIP we must use the `.' entry of the root directory. |
| 596 | * Simply tell vget, that it's a relocated directory. |
| 597 | */ |
| 598 | return (cd9660_vget_internal(mp, ino, vpp, |
| 599 | imp->iso_ftype == ISO_FTYPE_RRIP, dp)); |
| 600 | } |
| 601 | |
| 602 | /* |
| 603 | * Get file system statistics. |
| 604 | */ |
| 605 | int |
| 606 | cd9660_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) |
| 607 | { |
| 608 | struct iso_mnt *isomp; |
| 609 | |
| 610 | isomp = VFSTOISOFS(mp); |
| 611 | |
| 612 | sbp->f_bsize = isomp->logical_block_size; |
| 613 | sbp->f_iosize = sbp->f_bsize; /* XXX */ |
| 614 | sbp->f_blocks = isomp->volume_space_size; |
| 615 | sbp->f_bfree = 0; /* total free blocks */ |
| 616 | sbp->f_bavail = 0; /* blocks free for non superuser */ |
| 617 | sbp->f_files = 0; /* total files */ |
| 618 | sbp->f_ffree = 0; /* free file nodes */ |
| 619 | if (sbp != &mp->mnt_stat) { |
| 620 | sbp->f_type = mp->mnt_vfc->vfc_typenum; |
| 621 | bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); |
| 622 | } |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * File handle to vnode |
| 628 | * |
| 629 | * Have to be really careful about stale file handles: |
| 630 | * - check that the inode number is in range |
| 631 | * - call iget() to get the locked inode |
| 632 | * - check for an unallocated inode (i_mode == 0) |
| 633 | * - check that the generation number matches |
| 634 | */ |
| 635 | |
| 636 | struct ifid { |
| 637 | ushort ifid_len; |
| 638 | ushort ifid_pad; |
| 639 | int ifid_ino; |
| 640 | long ifid_start; |
| 641 | }; |
| 642 | |
| 643 | /* ARGSUSED */ |
| 644 | int |
| 645 | cd9660_fhtovp(struct mount *mp, struct vnode *rootvp, |
| 646 | struct fid *fhp, struct vnode **vpp) |
| 647 | { |
| 648 | struct ifid *ifhp = (struct ifid *)fhp; |
| 649 | struct iso_node *ip; |
| 650 | struct vnode *nvp; |
| 651 | int error; |
| 652 | |
| 653 | #ifdef ISOFS_DBG |
| 654 | kprintf("fhtovp: ino %d, start %ld\n", |
| 655 | ifhp->ifid_ino, ifhp->ifid_start); |
| 656 | #endif |
| 657 | |
| 658 | if ((error = VFS_VGET(mp, NULL, ifhp->ifid_ino, &nvp)) != 0) { |
| 659 | *vpp = NULLVP; |
| 660 | return (error); |
| 661 | } |
| 662 | ip = VTOI(nvp); |
| 663 | if (ip->inode.iso_mode == 0) { |
| 664 | vput(nvp); |
| 665 | *vpp = NULLVP; |
| 666 | return (ESTALE); |
| 667 | } |
| 668 | *vpp = nvp; |
| 669 | return (0); |
| 670 | } |
| 671 | |
| 672 | int |
| 673 | cd9660_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, |
| 674 | struct ucred **credanonp) |
| 675 | { |
| 676 | struct netcred *np; |
| 677 | struct iso_mnt *imp; |
| 678 | |
| 679 | imp = VFSTOISOFS(mp); |
| 680 | |
| 681 | /* |
| 682 | * Get the export permission structure for this <mp, client> tuple. |
| 683 | */ |
| 684 | np = vfs_export_lookup(mp, &imp->im_export, nam); |
| 685 | if (np == NULL) |
| 686 | return (EACCES); |
| 687 | |
| 688 | *exflagsp = np->netc_exflags; |
| 689 | *credanonp = &np->netc_anon; |
| 690 | return (0); |
| 691 | } |
| 692 | |
| 693 | int |
| 694 | cd9660_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp) |
| 695 | { |
| 696 | |
| 697 | /* |
| 698 | * XXXX |
| 699 | * It would be nice if we didn't always set the `relocated' flag |
| 700 | * and force the extra read, but I don't want to think about fixing |
| 701 | * that right now. |
| 702 | */ |
| 703 | return (cd9660_vget_internal(mp, ino, vpp, |
| 704 | #if 0 |
| 705 | VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, |
| 706 | #else |
| 707 | 0, |
| 708 | #endif |
| 709 | NULL)); |
| 710 | } |
| 711 | |
| 712 | int |
| 713 | cd9660_vget_internal(struct mount *mp, ino_t ino, struct vnode **vpp, |
| 714 | int relocated, struct iso_directory_record *isodir) |
| 715 | { |
| 716 | struct iso_mnt *imp; |
| 717 | struct iso_node *ip; |
| 718 | struct buf *bp; |
| 719 | struct vnode *vp; |
| 720 | cdev_t dev; |
| 721 | int error; |
| 722 | |
| 723 | imp = VFSTOISOFS(mp); |
| 724 | dev = imp->im_dev; |
| 725 | again: |
| 726 | if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) |
| 727 | return (0); |
| 728 | |
| 729 | /* Allocate a new vnode/iso_node. */ |
| 730 | error = getnewvnode(VT_ISOFS, mp, &vp, 0, 0); |
| 731 | if (error) { |
| 732 | *vpp = NULLVP; |
| 733 | return (error); |
| 734 | } |
| 735 | MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, |
| 736 | M_WAITOK | M_ZERO); |
| 737 | ip->i_vnode = vp; |
| 738 | ip->i_dev = dev; |
| 739 | ip->i_number = ino; |
| 740 | |
| 741 | /* |
| 742 | * Insert it into the inode hash table and check for a collision. |
| 743 | * If a collision occurs, throw away the vnode and try again. |
| 744 | */ |
| 745 | if (cd9660_ihashins(ip) != 0) { |
| 746 | kprintf("debug: cd9660 ihashins collision, retrying\n"); |
| 747 | vx_put(vp); |
| 748 | kfree(ip, M_ISOFSNODE); |
| 749 | goto again; |
| 750 | } |
| 751 | vp->v_data = ip; |
| 752 | |
| 753 | if (isodir == NULL) { |
| 754 | int lbn, off; |
| 755 | |
| 756 | lbn = lblkno(imp, ino); |
| 757 | if (lbn >= imp->volume_space_size) { |
| 758 | vx_put(vp); |
| 759 | kprintf("fhtovp: lbn exceed volume space %d\n", lbn); |
| 760 | return (ESTALE); |
| 761 | } |
| 762 | |
| 763 | off = blkoff(imp, ino); |
| 764 | if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { |
| 765 | vx_put(vp); |
| 766 | kprintf("fhtovp: crosses block boundary %d\n", |
| 767 | off + ISO_DIRECTORY_RECORD_SIZE); |
| 768 | return (ESTALE); |
| 769 | } |
| 770 | |
| 771 | error = bread(imp->im_devvp, |
| 772 | lblktooff(imp, lbn), |
| 773 | imp->logical_block_size, &bp); |
| 774 | if (error) { |
| 775 | vx_put(vp); |
| 776 | brelse(bp); |
| 777 | kprintf("fhtovp: bread error %d\n",error); |
| 778 | return (error); |
| 779 | } |
| 780 | isodir = (struct iso_directory_record *)(bp->b_data + off); |
| 781 | |
| 782 | if (off + isonum_711(isodir->length) > |
| 783 | imp->logical_block_size) { |
| 784 | vx_put(vp); |
| 785 | if (bp != NULL) |
| 786 | brelse(bp); |
| 787 | kprintf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", |
| 788 | off +isonum_711(isodir->length), off, |
| 789 | isonum_711(isodir->length)); |
| 790 | return (ESTALE); |
| 791 | } |
| 792 | |
| 793 | #if 0 |
| 794 | if (isonum_733(isodir->extent) + |
| 795 | isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { |
| 796 | if (bp != NULL) |
| 797 | brelse(bp); |
| 798 | kprintf("fhtovp: file start miss %d vs %d\n", |
| 799 | isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), |
| 800 | ifhp->ifid_start); |
| 801 | return (ESTALE); |
| 802 | } |
| 803 | #endif |
| 804 | } else |
| 805 | bp = 0; |
| 806 | |
| 807 | ip->i_mnt = imp; |
| 808 | ip->i_devvp = imp->im_devvp; |
| 809 | vref(ip->i_devvp); |
| 810 | |
| 811 | if (relocated) { |
| 812 | /* |
| 813 | * On relocated directories we must |
| 814 | * read the `.' entry out of a dir. |
| 815 | */ |
| 816 | ip->iso_start = ino >> imp->im_bshift; |
| 817 | if (bp != NULL) |
| 818 | brelse(bp); |
| 819 | if ((error = cd9660_devblkatoff(vp, (off_t)0, NULL, &bp)) != 0) { |
| 820 | vx_put(vp); |
| 821 | return (error); |
| 822 | } |
| 823 | isodir = (struct iso_directory_record *)bp->b_data; |
| 824 | } |
| 825 | |
| 826 | ip->iso_extent = isonum_733(isodir->extent); |
| 827 | ip->i_size = isonum_733(isodir->size); |
| 828 | ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; |
| 829 | |
| 830 | /* |
| 831 | * Setup time stamp, attribute |
| 832 | */ |
| 833 | vp->v_type = VNON; |
| 834 | switch (imp->iso_ftype) { |
| 835 | default: /* ISO_FTYPE_9660 */ |
| 836 | { |
| 837 | struct buf *bp2; |
| 838 | int off; |
| 839 | if ((imp->im_flags & ISOFSMNT_EXTATT) |
| 840 | && (off = isonum_711(isodir->ext_attr_length))) |
| 841 | cd9660_devblkatoff(vp, (off_t)-(off << imp->im_bshift), NULL, |
| 842 | &bp2); |
| 843 | else |
| 844 | bp2 = NULL; |
| 845 | cd9660_defattr(isodir, ip, bp2, ISO_FTYPE_9660); |
| 846 | cd9660_deftstamp(isodir, ip, bp2, ISO_FTYPE_9660); |
| 847 | if (bp2) |
| 848 | brelse(bp2); |
| 849 | break; |
| 850 | } |
| 851 | case ISO_FTYPE_RRIP: |
| 852 | cd9660_rrip_analyze(isodir, ip, imp); |
| 853 | break; |
| 854 | } |
| 855 | |
| 856 | if (bp != NULL) |
| 857 | brelse(bp); |
| 858 | |
| 859 | /* |
| 860 | * Initialize the associated vnode |
| 861 | */ |
| 862 | vp->v_type = IFTOVT(ip->inode.iso_mode); |
| 863 | |
| 864 | switch (vp->v_type) { |
| 865 | case VFIFO: |
| 866 | vp->v_ops = &mp->mnt_vn_fifo_ops; |
| 867 | break; |
| 868 | case VCHR: |
| 869 | case VBLK: |
| 870 | vp->v_ops = &mp->mnt_vn_spec_ops; |
| 871 | addaliasu(vp, umajor(ip->inode.iso_rdev), |
| 872 | uminor(ip->inode.iso_rdev)); |
| 873 | break; |
| 874 | case VREG: |
| 875 | case VDIR: |
| 876 | vinitvmio(vp, ip->i_size); |
| 877 | break; |
| 878 | default: |
| 879 | break; |
| 880 | } |
| 881 | |
| 882 | if (ip->iso_extent == imp->root_extent) |
| 883 | vsetflags(vp, VROOT); |
| 884 | |
| 885 | /* |
| 886 | * Return the locked and refd vp |
| 887 | */ |
| 888 | *vpp = vp; |
| 889 | return (0); |
| 890 | } |
| 891 | |
| 892 | /* |
| 893 | * Vnode pointer to File handle |
| 894 | */ |
| 895 | /* ARGSUSED */ |
| 896 | int |
| 897 | cd9660_vptofh(struct vnode *vp, struct fid *fhp) |
| 898 | { |
| 899 | struct iso_node *ip = VTOI(vp); |
| 900 | struct ifid *ifhp; |
| 901 | |
| 902 | ifhp = (struct ifid *)fhp; |
| 903 | ifhp->ifid_len = sizeof(struct ifid); |
| 904 | |
| 905 | ifhp->ifid_ino = ip->i_number; |
| 906 | ifhp->ifid_start = ip->iso_start; |
| 907 | |
| 908 | #ifdef ISOFS_DBG |
| 909 | kprintf("vptofh: ino %d, start %ld\n", |
| 910 | ifhp->ifid_ino,ifhp->ifid_start); |
| 911 | #endif |
| 912 | return 0; |
| 913 | } |