| 1 | /* $NetBSD: cd9660_vfsops.c,v 1.90 2015/03/28 19:24:05 maxv Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1994 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley |
| 8 | * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension |
| 9 | * Support code is derived from software contributed to Berkeley |
| 10 | * by Atsushi Murai (amurai@spec.co.jp). |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * 3. Neither the name of the University nor the names of its contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * @(#)cd9660_vfsops.c 8.18 (Berkeley) 5/22/95 |
| 37 | */ |
| 38 | |
| 39 | #include <sys/cdefs.h> |
| 40 | __KERNEL_RCSID(0, "$NetBSD: cd9660_vfsops.c,v 1.90 2015/03/28 19:24:05 maxv Exp $" ); |
| 41 | |
| 42 | #if defined(_KERNEL_OPT) |
| 43 | #include "opt_compat_netbsd.h" |
| 44 | #endif |
| 45 | |
| 46 | #include <sys/param.h> |
| 47 | #include <sys/sysctl.h> |
| 48 | #include <sys/systm.h> |
| 49 | #include <sys/namei.h> |
| 50 | #include <sys/proc.h> |
| 51 | #include <sys/kernel.h> |
| 52 | #include <sys/vnode.h> |
| 53 | #include <miscfs/genfs/genfs.h> |
| 54 | #include <miscfs/specfs/specdev.h> |
| 55 | #include <sys/mount.h> |
| 56 | #include <sys/buf.h> |
| 57 | #include <sys/file.h> |
| 58 | #include <sys/disklabel.h> |
| 59 | #include <sys/device.h> |
| 60 | #include <sys/ioctl.h> |
| 61 | #include <sys/cdio.h> |
| 62 | #include <sys/errno.h> |
| 63 | #include <sys/malloc.h> |
| 64 | #include <sys/pool.h> |
| 65 | #include <sys/stat.h> |
| 66 | #include <sys/conf.h> |
| 67 | #include <sys/dirent.h> |
| 68 | #include <sys/kauth.h> |
| 69 | #include <sys/module.h> |
| 70 | |
| 71 | #include <fs/cd9660/iso.h> |
| 72 | #include <fs/cd9660/cd9660_extern.h> |
| 73 | #include <fs/cd9660/iso_rrip.h> |
| 74 | #include <fs/cd9660/cd9660_node.h> |
| 75 | #include <fs/cd9660/cd9660_mount.h> |
| 76 | |
| 77 | MODULE(MODULE_CLASS_VFS, cd9660, NULL); |
| 78 | |
| 79 | MALLOC_JUSTDEFINE(M_ISOFSMNT, "ISOFS mount" , "ISOFS mount structure" ); |
| 80 | |
| 81 | static struct sysctllog *cd9660_sysctl_log; |
| 82 | |
| 83 | extern const struct vnodeopv_desc cd9660_vnodeop_opv_desc; |
| 84 | extern const struct vnodeopv_desc cd9660_specop_opv_desc; |
| 85 | extern const struct vnodeopv_desc cd9660_fifoop_opv_desc; |
| 86 | |
| 87 | const struct vnodeopv_desc * const cd9660_vnodeopv_descs[] = { |
| 88 | &cd9660_vnodeop_opv_desc, |
| 89 | &cd9660_specop_opv_desc, |
| 90 | &cd9660_fifoop_opv_desc, |
| 91 | NULL, |
| 92 | }; |
| 93 | |
| 94 | struct vfsops cd9660_vfsops = { |
| 95 | .vfs_name = MOUNT_CD9660, |
| 96 | .vfs_min_mount_data = sizeof (struct iso_args), |
| 97 | .vfs_mount = cd9660_mount, |
| 98 | .vfs_start = cd9660_start, |
| 99 | .vfs_unmount = cd9660_unmount, |
| 100 | .vfs_root = cd9660_root, |
| 101 | .vfs_quotactl = (void *)eopnotsupp, |
| 102 | .vfs_statvfs = cd9660_statvfs, |
| 103 | .vfs_sync = cd9660_sync, |
| 104 | .vfs_vget = cd9660_vget, |
| 105 | .vfs_loadvnode = cd9660_loadvnode, |
| 106 | .vfs_fhtovp = cd9660_fhtovp, |
| 107 | .vfs_vptofh = cd9660_vptofh, |
| 108 | .vfs_init = cd9660_init, |
| 109 | .vfs_reinit = cd9660_reinit, |
| 110 | .vfs_done = cd9660_done, |
| 111 | .vfs_mountroot = cd9660_mountroot, |
| 112 | .vfs_snapshot = (void *)eopnotsupp, |
| 113 | .vfs_extattrctl = vfs_stdextattrctl, |
| 114 | .vfs_suspendctl = (void *)eopnotsupp, |
| 115 | .vfs_renamelock_enter = genfs_renamelock_enter, |
| 116 | .vfs_renamelock_exit = genfs_renamelock_exit, |
| 117 | .vfs_fsync = (void *)eopnotsupp, |
| 118 | .vfs_opv_descs = cd9660_vnodeopv_descs |
| 119 | }; |
| 120 | |
| 121 | static const struct genfs_ops cd9660_genfsops = { |
| 122 | .gop_size = genfs_size, |
| 123 | }; |
| 124 | |
| 125 | /* |
| 126 | * Called by vfs_mountroot when iso is going to be mounted as root. |
| 127 | * |
| 128 | * Name is updated by mount(8) after booting. |
| 129 | */ |
| 130 | static int iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len); |
| 131 | static int iso_mountfs(struct vnode *devvp, struct mount *mp, |
| 132 | struct lwp *l, struct iso_args *argp); |
| 133 | |
| 134 | static int |
| 135 | cd9660_modcmd(modcmd_t cmd, void *arg) |
| 136 | { |
| 137 | int error; |
| 138 | |
| 139 | switch (cmd) { |
| 140 | case MODULE_CMD_INIT: |
| 141 | error = vfs_attach(&cd9660_vfsops); |
| 142 | if (error != 0) |
| 143 | break; |
| 144 | sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, |
| 145 | CTLFLAG_PERMANENT, CTLTYPE_NODE, "cd9660" , |
| 146 | SYSCTL_DESCR("ISO-9660 file system" ), |
| 147 | NULL, 0, NULL, 0, |
| 148 | CTL_VFS, 14, CTL_EOL); |
| 149 | sysctl_createv(&cd9660_sysctl_log, 0, NULL, NULL, |
| 150 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| 151 | CTLTYPE_INT, "utf8_joliet" , |
| 152 | SYSCTL_DESCR("Encode Joliet filenames to UTF-8" ), |
| 153 | NULL, 0, &cd9660_utf8_joliet, 0, |
| 154 | CTL_VFS, 14, CD9660_UTF8_JOLIET, CTL_EOL); |
| 155 | /* |
| 156 | * XXX the "14" above could be dynamic, thereby eliminating |
| 157 | * one more instance of the "number to vfs" mapping problem, |
| 158 | * but "14" is the order as taken from sys/mount.h |
| 159 | */ |
| 160 | break; |
| 161 | case MODULE_CMD_FINI: |
| 162 | error = vfs_detach(&cd9660_vfsops); |
| 163 | if (error != 0) |
| 164 | break; |
| 165 | sysctl_teardown(&cd9660_sysctl_log); |
| 166 | break; |
| 167 | default: |
| 168 | error = ENOTTY; |
| 169 | break; |
| 170 | } |
| 171 | |
| 172 | return (error); |
| 173 | } |
| 174 | |
| 175 | int |
| 176 | cd9660_mountroot(void) |
| 177 | { |
| 178 | struct mount *mp; |
| 179 | struct lwp *l = curlwp; |
| 180 | int error; |
| 181 | struct iso_args args; |
| 182 | |
| 183 | if (device_class(root_device) != DV_DISK) |
| 184 | return (ENODEV); |
| 185 | |
| 186 | if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device" , &mp)) |
| 187 | != 0) { |
| 188 | vrele(rootvp); |
| 189 | return (error); |
| 190 | } |
| 191 | |
| 192 | args.flags = ISOFSMNT_ROOT; |
| 193 | if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) { |
| 194 | vfs_unbusy(mp, false, NULL); |
| 195 | vfs_destroy(mp); |
| 196 | return (error); |
| 197 | } |
| 198 | mountlist_append(mp); |
| 199 | (void)cd9660_statvfs(mp, &mp->mnt_stat); |
| 200 | vfs_unbusy(mp, false, NULL); |
| 201 | return (0); |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * VFS Operations. |
| 206 | * |
| 207 | * mount system call |
| 208 | */ |
| 209 | int |
| 210 | cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len) |
| 211 | { |
| 212 | struct lwp *l = curlwp; |
| 213 | struct vnode *devvp; |
| 214 | struct iso_args *args = data; |
| 215 | int error; |
| 216 | struct iso_mnt *imp = VFSTOISOFS(mp); |
| 217 | |
| 218 | if (args == NULL) |
| 219 | return EINVAL; |
| 220 | if (*data_len < sizeof *args) |
| 221 | return EINVAL; |
| 222 | |
| 223 | if (mp->mnt_flag & MNT_GETARGS) { |
| 224 | if (imp == NULL) |
| 225 | return EIO; |
| 226 | args->fspec = NULL; |
| 227 | args->flags = imp->im_flags; |
| 228 | *data_len = sizeof (*args); |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | if ((mp->mnt_flag & MNT_RDONLY) == 0) |
| 233 | return (EROFS); |
| 234 | |
| 235 | if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL) |
| 236 | return EINVAL; |
| 237 | |
| 238 | /* |
| 239 | * Not an update, or updating the name: look up the name |
| 240 | * and verify that it refers to a sensible block device. |
| 241 | */ |
| 242 | error = namei_simple_user(args->fspec, |
| 243 | NSM_FOLLOW_NOEMULROOT, &devvp); |
| 244 | if (error != 0) |
| 245 | return (error); |
| 246 | |
| 247 | if (devvp->v_type != VBLK) { |
| 248 | vrele(devvp); |
| 249 | return ENOTBLK; |
| 250 | } |
| 251 | if (bdevsw_lookup(devvp->v_rdev) == NULL) { |
| 252 | vrele(devvp); |
| 253 | return ENXIO; |
| 254 | } |
| 255 | /* |
| 256 | * If mount by non-root, then verify that user has necessary |
| 257 | * permissions on the device. |
| 258 | */ |
| 259 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 260 | error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT, |
| 261 | KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD)); |
| 262 | if (error) { |
| 263 | goto fail; |
| 264 | } |
| 265 | if ((mp->mnt_flag & MNT_UPDATE) == 0) { |
| 266 | error = VOP_OPEN(devvp, FREAD, FSCRED); |
| 267 | if (error) |
| 268 | goto fail; |
| 269 | VOP_UNLOCK(devvp); |
| 270 | error = iso_mountfs(devvp, mp, l, args); |
| 271 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 272 | if (error) { |
| 273 | (void)VOP_CLOSE(devvp, FREAD, NOCRED); |
| 274 | goto fail; |
| 275 | } |
| 276 | VOP_UNLOCK(devvp); |
| 277 | /* reference to devvp is donated through iso_mountfs */ |
| 278 | } else { |
| 279 | if (devvp != imp->im_devvp && |
| 280 | devvp->v_rdev != imp->im_devvp->v_rdev) { |
| 281 | error = EINVAL; /* needs translation */ |
| 282 | goto fail; |
| 283 | } |
| 284 | VOP_UNLOCK(devvp); |
| 285 | vrele(devvp); |
| 286 | } |
| 287 | return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE, |
| 288 | mp->mnt_op->vfs_name, mp, l); |
| 289 | |
| 290 | fail: |
| 291 | VOP_UNLOCK(devvp); |
| 292 | vrele(devvp); |
| 293 | return (error); |
| 294 | } |
| 295 | |
| 296 | /* |
| 297 | * Make a mount point from a volume descriptor |
| 298 | */ |
| 299 | static int |
| 300 | iso_makemp(struct iso_mnt *isomp, struct buf *bp, int *ea_len) |
| 301 | { |
| 302 | struct iso_primary_descriptor *pri; |
| 303 | int logical_block_size; |
| 304 | struct iso_directory_record *rootp; |
| 305 | |
| 306 | pri = (struct iso_primary_descriptor *)bp->b_data; |
| 307 | |
| 308 | logical_block_size = isonum_723 (pri->logical_block_size); |
| 309 | |
| 310 | if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE |
| 311 | || (logical_block_size & (logical_block_size - 1)) != 0) |
| 312 | return -1; |
| 313 | |
| 314 | rootp = (struct iso_directory_record *)pri->root_directory_record; |
| 315 | |
| 316 | isomp->logical_block_size = logical_block_size; |
| 317 | isomp->volume_space_size = isonum_733 (pri->volume_space_size); |
| 318 | memcpy(isomp->root, rootp, sizeof(isomp->root)); |
| 319 | isomp->root_extent = isonum_733 (rootp->extent); |
| 320 | isomp->root_size = isonum_733 (rootp->size); |
| 321 | isomp->im_joliet_level = 0; |
| 322 | |
| 323 | isomp->im_bmask = logical_block_size - 1; |
| 324 | isomp->im_bshift = 0; |
| 325 | while ((1 << isomp->im_bshift) < isomp->logical_block_size) |
| 326 | isomp->im_bshift++; |
| 327 | |
| 328 | if (ea_len != NULL) |
| 329 | *ea_len = isonum_711(rootp->ext_attr_length); |
| 330 | |
| 331 | return 0; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * Common code for mount and mountroot |
| 336 | */ |
| 337 | static int |
| 338 | iso_mountfs(struct vnode *devvp, struct mount *mp, struct lwp *l, |
| 339 | struct iso_args *argp) |
| 340 | { |
| 341 | struct iso_mnt *isomp = (struct iso_mnt *)0; |
| 342 | struct buf *bp = NULL, *pribp = NULL, *supbp = NULL; |
| 343 | dev_t dev = devvp->v_rdev; |
| 344 | int error = EINVAL; |
| 345 | int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; |
| 346 | int iso_bsize; |
| 347 | int iso_blknum; |
| 348 | int joliet_level; |
| 349 | struct iso_volume_descriptor *vdp; |
| 350 | struct iso_supplementary_descriptor *sup; |
| 351 | int sess = 0; |
| 352 | int ext_attr_length; |
| 353 | struct disklabel label; |
| 354 | |
| 355 | if (!ronly) |
| 356 | return EROFS; |
| 357 | |
| 358 | /* Flush out any old buffers remaining from a previous use. */ |
| 359 | if ((error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0)) != 0) |
| 360 | return (error); |
| 361 | |
| 362 | /* This is the "logical sector size". The standard says this |
| 363 | * should be 2048 or the physical sector size on the device, |
| 364 | * whichever is greater. For now, we'll just use a constant. |
| 365 | */ |
| 366 | iso_bsize = ISO_DEFAULT_BLOCK_SIZE; |
| 367 | |
| 368 | error = VOP_IOCTL(devvp, DIOCGDINFO, &label, FREAD, FSCRED); |
| 369 | if (!error) { |
| 370 | /* XXX more sanity checks? */ |
| 371 | sess = label.d_partitions[DISKPART(dev)].p_cdsession; |
| 372 | } else { |
| 373 | /* fallback to old method */ |
| 374 | error = VOP_IOCTL(devvp, CDIOREADMSADDR, &sess, 0, FSCRED); |
| 375 | if (error) |
| 376 | sess = 0; /* never mind */ |
| 377 | } |
| 378 | #ifdef ISO_DEBUG |
| 379 | printf("isofs: session offset (part %" PRId32") %d\n" , DISKPART(dev), sess); |
| 380 | #endif |
| 381 | |
| 382 | for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { |
| 383 | if ((error = bread(devvp, (iso_blknum+sess) * btodb(iso_bsize), |
| 384 | iso_bsize, 0, &bp)) != 0) |
| 385 | goto out; |
| 386 | |
| 387 | vdp = (struct iso_volume_descriptor *)bp->b_data; |
| 388 | if (memcmp(vdp->id, ISO_STANDARD_ID, sizeof(vdp->id)) != 0) { |
| 389 | error = EINVAL; |
| 390 | goto out; |
| 391 | } |
| 392 | |
| 393 | switch (isonum_711(vdp->type)) { |
| 394 | case ISO_VD_PRIMARY: |
| 395 | if (pribp == NULL) { |
| 396 | pribp = bp; |
| 397 | bp = NULL; |
| 398 | } |
| 399 | break; |
| 400 | |
| 401 | case ISO_VD_SUPPLEMENTARY: |
| 402 | if (supbp == NULL) { |
| 403 | supbp = bp; |
| 404 | bp = NULL; |
| 405 | } |
| 406 | break; |
| 407 | |
| 408 | default: |
| 409 | break; |
| 410 | } |
| 411 | |
| 412 | if (isonum_711 (vdp->type) == ISO_VD_END) { |
| 413 | brelse(bp, 0); |
| 414 | bp = NULL; |
| 415 | break; |
| 416 | } |
| 417 | |
| 418 | if (bp != NULL) { |
| 419 | brelse(bp, 0); |
| 420 | bp = NULL; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | if (pribp == NULL) { |
| 425 | error = EINVAL; |
| 426 | goto out; |
| 427 | } |
| 428 | |
| 429 | isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); |
| 430 | memset(isomp, 0, sizeof *isomp); |
| 431 | if (iso_makemp(isomp, pribp, &ext_attr_length) == -1) { |
| 432 | error = EINVAL; |
| 433 | goto out; |
| 434 | } |
| 435 | |
| 436 | isomp->volume_space_size += sess; |
| 437 | |
| 438 | brelse(pribp, BC_AGE); |
| 439 | pribp = NULL; |
| 440 | |
| 441 | mp->mnt_data = isomp; |
| 442 | mp->mnt_stat.f_fsidx.__fsid_val[0] = (long)dev; |
| 443 | mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_CD9660); |
| 444 | mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; |
| 445 | mp->mnt_stat.f_namemax = ISO_MAXNAMLEN; |
| 446 | mp->mnt_flag |= MNT_LOCAL; |
| 447 | mp->mnt_iflag |= IMNT_MPSAFE; |
| 448 | mp->mnt_dev_bshift = iso_bsize; |
| 449 | mp->mnt_fs_bshift = isomp->im_bshift; |
| 450 | isomp->im_mountp = mp; |
| 451 | isomp->im_dev = dev; |
| 452 | isomp->im_devvp = devvp; |
| 453 | |
| 454 | /* Check the Rock Ridge Extension support */ |
| 455 | if (!(argp->flags & ISOFSMNT_NORRIP)) { |
| 456 | struct iso_directory_record *rootp; |
| 457 | |
| 458 | if ((error = bread(isomp->im_devvp, |
| 459 | (isomp->root_extent + ext_attr_length) << |
| 460 | (isomp->im_bshift - DEV_BSHIFT), |
| 461 | isomp->logical_block_size, |
| 462 | 0, &bp)) != 0) |
| 463 | goto out; |
| 464 | |
| 465 | rootp = (struct iso_directory_record *)bp->b_data; |
| 466 | |
| 467 | if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { |
| 468 | argp->flags |= ISOFSMNT_NORRIP; |
| 469 | } else { |
| 470 | argp->flags &= ~ISOFSMNT_GENS; |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * The contents are valid, |
| 475 | * but they will get reread as part of another vnode, so... |
| 476 | */ |
| 477 | brelse(bp, BC_AGE); |
| 478 | bp = NULL; |
| 479 | } |
| 480 | isomp->im_flags = argp->flags & (ISOFSMNT_NORRIP | ISOFSMNT_GENS | |
| 481 | ISOFSMNT_EXTATT | ISOFSMNT_NOJOLIET | ISOFSMNT_RRCASEINS); |
| 482 | |
| 483 | if (isomp->im_flags & ISOFSMNT_GENS) |
| 484 | isomp->iso_ftype = ISO_FTYPE_9660; |
| 485 | else if (isomp->im_flags & ISOFSMNT_NORRIP) { |
| 486 | isomp->iso_ftype = ISO_FTYPE_DEFAULT; |
| 487 | if (argp->flags & ISOFSMNT_NOCASETRANS) |
| 488 | isomp->im_flags |= ISOFSMNT_NOCASETRANS; |
| 489 | } else |
| 490 | isomp->iso_ftype = ISO_FTYPE_RRIP; |
| 491 | |
| 492 | /* Check the Joliet Extension support */ |
| 493 | if ((argp->flags & ISOFSMNT_NORRIP) != 0 && |
| 494 | (argp->flags & ISOFSMNT_NOJOLIET) == 0 && |
| 495 | supbp != NULL) { |
| 496 | joliet_level = 0; |
| 497 | sup = (struct iso_supplementary_descriptor *)supbp->b_data; |
| 498 | |
| 499 | if ((isonum_711(sup->flags) & 1) == 0) { |
| 500 | if (memcmp(sup->escape, "%/@" , 3) == 0) |
| 501 | joliet_level = 1; |
| 502 | if (memcmp(sup->escape, "%/C" , 3) == 0) |
| 503 | joliet_level = 2; |
| 504 | if (memcmp(sup->escape, "%/E" , 3) == 0) |
| 505 | joliet_level = 3; |
| 506 | } |
| 507 | if (joliet_level != 0) { |
| 508 | if (iso_makemp(isomp, supbp, NULL) == -1) { |
| 509 | error = EINVAL; |
| 510 | goto out; |
| 511 | } |
| 512 | isomp->im_joliet_level = joliet_level; |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | if (supbp != NULL) { |
| 517 | brelse(supbp, 0); |
| 518 | supbp = NULL; |
| 519 | } |
| 520 | |
| 521 | spec_node_setmountedfs(devvp, mp); |
| 522 | |
| 523 | return 0; |
| 524 | out: |
| 525 | if (bp) |
| 526 | brelse(bp, 0); |
| 527 | if (pribp) |
| 528 | brelse(pribp, 0); |
| 529 | if (supbp) |
| 530 | brelse(supbp, 0); |
| 531 | if (isomp) { |
| 532 | free(isomp, M_ISOFSMNT); |
| 533 | mp->mnt_data = NULL; |
| 534 | } |
| 535 | return error; |
| 536 | } |
| 537 | |
| 538 | /* |
| 539 | * Make a filesystem operational. |
| 540 | * Nothing to do at the moment. |
| 541 | */ |
| 542 | /* ARGSUSED */ |
| 543 | int |
| 544 | cd9660_start(struct mount *mp, int flags) |
| 545 | { |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | /* |
| 550 | * unmount system call |
| 551 | */ |
| 552 | int |
| 553 | cd9660_unmount(struct mount *mp, int mntflags) |
| 554 | { |
| 555 | struct iso_mnt *isomp; |
| 556 | int error, flags = 0; |
| 557 | |
| 558 | if (mntflags & MNT_FORCE) |
| 559 | flags |= FORCECLOSE; |
| 560 | if ((error = vflush(mp, NULLVP, flags)) != 0) |
| 561 | return (error); |
| 562 | |
| 563 | isomp = VFSTOISOFS(mp); |
| 564 | |
| 565 | if (isomp->im_devvp->v_type != VBAD) |
| 566 | spec_node_setmountedfs(isomp->im_devvp, NULL); |
| 567 | |
| 568 | vn_lock(isomp->im_devvp, LK_EXCLUSIVE | LK_RETRY); |
| 569 | error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED); |
| 570 | vput(isomp->im_devvp); |
| 571 | free(isomp, M_ISOFSMNT); |
| 572 | mp->mnt_data = NULL; |
| 573 | mp->mnt_flag &= ~MNT_LOCAL; |
| 574 | return (error); |
| 575 | } |
| 576 | |
| 577 | /* |
| 578 | * Return root of a filesystem |
| 579 | */ |
| 580 | int |
| 581 | cd9660_root(struct mount *mp, struct vnode **vpp) |
| 582 | { |
| 583 | struct iso_mnt *imp = VFSTOISOFS(mp); |
| 584 | struct iso_directory_record *dp = |
| 585 | (struct iso_directory_record *)imp->root; |
| 586 | ino_t ino = isodirino(dp, imp); |
| 587 | |
| 588 | return cd9660_vget(mp, ino, vpp); |
| 589 | } |
| 590 | |
| 591 | /* |
| 592 | * Get file system statistics. |
| 593 | */ |
| 594 | int |
| 595 | cd9660_statvfs(struct mount *mp, struct statvfs *sbp) |
| 596 | { |
| 597 | struct iso_mnt *isomp; |
| 598 | |
| 599 | isomp = VFSTOISOFS(mp); |
| 600 | |
| 601 | sbp->f_bsize = isomp->logical_block_size; |
| 602 | sbp->f_frsize = sbp->f_bsize; |
| 603 | sbp->f_iosize = sbp->f_bsize; /* XXX */ |
| 604 | sbp->f_blocks = isomp->volume_space_size; |
| 605 | sbp->f_bfree = 0; /* total free blocks */ |
| 606 | sbp->f_bavail = 0; /* blocks free for non superuser */ |
| 607 | sbp->f_bresvd = 0; /* total reserved blocks */ |
| 608 | sbp->f_files = 0; /* total files */ |
| 609 | sbp->f_ffree = 0; /* free file nodes */ |
| 610 | sbp->f_favail = 0; /* free file nodes for non superuser */ |
| 611 | sbp->f_fresvd = 0; /* reserved file nodes */ |
| 612 | copy_statvfs_info(sbp, mp); |
| 613 | /* Use the first spare for flags: */ |
| 614 | sbp->f_spare[0] = isomp->im_flags; |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | /* ARGSUSED */ |
| 619 | int |
| 620 | cd9660_sync(struct mount *mp, int waitfor, kauth_cred_t cred) |
| 621 | { |
| 622 | return 0; |
| 623 | } |
| 624 | |
| 625 | /* |
| 626 | * File handle to vnode |
| 627 | * |
| 628 | * Have to be really careful about stale file handles: |
| 629 | * - check that the inode number is in range |
| 630 | * - call iget() to get the locked inode |
| 631 | * - check for an unallocated inode (i_mode == 0) |
| 632 | * - check that the generation number matches |
| 633 | */ |
| 634 | |
| 635 | struct ifid { |
| 636 | ushort ifid_len; |
| 637 | ushort ifid_pad; |
| 638 | ino_t ifid_ino; |
| 639 | #ifdef ISOFS_DBG |
| 640 | u_long ifid_start; |
| 641 | #endif |
| 642 | }; |
| 643 | |
| 644 | /* ARGSUSED */ |
| 645 | int |
| 646 | cd9660_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) |
| 647 | { |
| 648 | struct ifid ifh; |
| 649 | struct iso_node *ip; |
| 650 | struct vnode *nvp; |
| 651 | int error; |
| 652 | |
| 653 | if (fhp->fid_len != sizeof(ifh)) |
| 654 | return EINVAL; |
| 655 | |
| 656 | memcpy(&ifh, fhp, sizeof(ifh)); |
| 657 | #ifdef ISOFS_DBG |
| 658 | printf("fhtovp: ino %" PRIu64", start %lu\n" , |
| 659 | ifh.ifid_ino, ifh.ifid_start); |
| 660 | #endif |
| 661 | |
| 662 | if ((error = VFS_VGET(mp, ifh.ifid_ino, &nvp)) != 0) { |
| 663 | *vpp = NULLVP; |
| 664 | return (error); |
| 665 | } |
| 666 | ip = VTOI(nvp); |
| 667 | if (ip->inode.iso_mode == 0) { |
| 668 | vput(nvp); |
| 669 | *vpp = NULLVP; |
| 670 | return (ESTALE); |
| 671 | } |
| 672 | *vpp = nvp; |
| 673 | return (0); |
| 674 | } |
| 675 | |
| 676 | int |
| 677 | cd9660_vget(struct mount *mp, ino_t ino, struct vnode **vpp) |
| 678 | { |
| 679 | int error; |
| 680 | |
| 681 | error = vcache_get(mp, &ino, sizeof(ino), vpp); |
| 682 | if (error) |
| 683 | return error; |
| 684 | error = vn_lock(*vpp, LK_EXCLUSIVE); |
| 685 | if (error) { |
| 686 | vrele(*vpp); |
| 687 | *vpp = NULL; |
| 688 | return error; |
| 689 | } |
| 690 | return 0; |
| 691 | } |
| 692 | |
| 693 | int |
| 694 | cd9660_loadvnode(struct mount *mp, struct vnode *vp, |
| 695 | const void *key, size_t key_len, const void **new_key) |
| 696 | { |
| 697 | struct iso_mnt *imp; |
| 698 | struct iso_node *ip; |
| 699 | struct iso_directory_record *isodir; |
| 700 | struct buf *bp; |
| 701 | dev_t dev; |
| 702 | ino_t ino; |
| 703 | int lbn, off; |
| 704 | int error; |
| 705 | |
| 706 | KASSERT(key_len == sizeof(ino)); |
| 707 | memcpy(&ino, key, key_len); |
| 708 | imp = VFSTOISOFS(mp); |
| 709 | dev = imp->im_dev; |
| 710 | |
| 711 | ip = pool_get(&cd9660_node_pool, PR_WAITOK); |
| 712 | |
| 713 | memset(ip, 0, sizeof(struct iso_node)); |
| 714 | ip->i_vnode = vp; |
| 715 | ip->i_dev = dev; |
| 716 | ip->i_number = ino; |
| 717 | ip->i_mnt = imp; |
| 718 | ip->i_devvp = imp->im_devvp; |
| 719 | |
| 720 | lbn = cd9660_lblkno(imp, ino); |
| 721 | if (lbn >= imp->volume_space_size) { |
| 722 | pool_put(&cd9660_node_pool, ip); |
| 723 | printf("fhtovp: lbn exceed volume space %d\n" , lbn); |
| 724 | return (ESTALE); |
| 725 | } |
| 726 | |
| 727 | off = cd9660_blkoff(imp, ino); |
| 728 | if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { |
| 729 | pool_put(&cd9660_node_pool, ip); |
| 730 | printf("fhtovp: crosses block boundary %d\n" , |
| 731 | off + ISO_DIRECTORY_RECORD_SIZE); |
| 732 | return (ESTALE); |
| 733 | } |
| 734 | |
| 735 | error = bread(imp->im_devvp, |
| 736 | lbn << (imp->im_bshift - DEV_BSHIFT), |
| 737 | imp->logical_block_size, 0, &bp); |
| 738 | if (error) { |
| 739 | pool_put(&cd9660_node_pool, ip); |
| 740 | printf("fhtovp: bread error %d\n" ,error); |
| 741 | return (error); |
| 742 | } |
| 743 | isodir = (struct iso_directory_record *)((char *)bp->b_data + off); |
| 744 | |
| 745 | if (off + isonum_711(isodir->length) > imp->logical_block_size) { |
| 746 | pool_put(&cd9660_node_pool, ip); |
| 747 | brelse(bp, 0); |
| 748 | printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n" , |
| 749 | off +isonum_711(isodir->length), off, |
| 750 | isonum_711(isodir->length)); |
| 751 | return (ESTALE); |
| 752 | } |
| 753 | |
| 754 | #if 0 |
| 755 | if (isonum_733(isodir->extent) + |
| 756 | isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { |
| 757 | pool_put(&cd9660_node_pool, ip); |
| 758 | if (bp != 0) |
| 759 | brelse(bp, 0); |
| 760 | printf("fhtovp: file start miss %d vs %d\n" , |
| 761 | isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), |
| 762 | ifhp->ifid_start); |
| 763 | return (ESTALE); |
| 764 | } |
| 765 | #endif |
| 766 | |
| 767 | ip->iso_extent = isonum_733(isodir->extent); |
| 768 | ip->i_size = isonum_733(isodir->size); |
| 769 | ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; |
| 770 | |
| 771 | vp->v_tag = VT_ISOFS; |
| 772 | vp->v_op = cd9660_vnodeop_p; |
| 773 | vp->v_data = ip; |
| 774 | genfs_node_init(vp, &cd9660_genfsops); |
| 775 | |
| 776 | /* |
| 777 | * Setup time stamp, attribute |
| 778 | */ |
| 779 | switch (imp->iso_ftype) { |
| 780 | default: /* ISO_FTYPE_9660 */ |
| 781 | { |
| 782 | struct buf *bp2; |
| 783 | if ((imp->im_flags & ISOFSMNT_EXTATT) |
| 784 | && (off = isonum_711(isodir->ext_attr_length))) |
| 785 | cd9660_blkatoff(vp, (off_t)-(off << imp->im_bshift), |
| 786 | NULL, &bp2); |
| 787 | else |
| 788 | bp2 = NULL; |
| 789 | cd9660_defattr(isodir, ip, bp2); |
| 790 | cd9660_deftstamp(isodir, ip, bp2); |
| 791 | if (bp2) |
| 792 | brelse(bp2, 0); |
| 793 | break; |
| 794 | } |
| 795 | case ISO_FTYPE_RRIP: |
| 796 | cd9660_rrip_analyze(isodir, ip, imp); |
| 797 | break; |
| 798 | } |
| 799 | |
| 800 | brelse(bp, 0); |
| 801 | |
| 802 | /* |
| 803 | * Initialize the associated vnode |
| 804 | */ |
| 805 | switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { |
| 806 | case VFIFO: |
| 807 | vp->v_op = cd9660_fifoop_p; |
| 808 | break; |
| 809 | case VCHR: |
| 810 | case VBLK: |
| 811 | /* |
| 812 | * if device, look at device number table for translation |
| 813 | */ |
| 814 | vp->v_op = cd9660_specop_p; |
| 815 | spec_node_init(vp, ip->inode.iso_rdev); |
| 816 | break; |
| 817 | case VLNK: |
| 818 | case VNON: |
| 819 | case VSOCK: |
| 820 | case VDIR: |
| 821 | case VBAD: |
| 822 | break; |
| 823 | case VREG: |
| 824 | uvm_vnp_setsize(vp, ip->i_size); |
| 825 | break; |
| 826 | } |
| 827 | |
| 828 | if (vp->v_type != VREG) |
| 829 | uvm_vnp_setsize(vp, 0); |
| 830 | |
| 831 | if (ip->iso_extent == imp->root_extent) |
| 832 | vp->v_vflag |= VV_ROOT; |
| 833 | |
| 834 | /* |
| 835 | * XXX need generation number? |
| 836 | */ |
| 837 | |
| 838 | *new_key = &ip->i_number; |
| 839 | return 0; |
| 840 | } |
| 841 | |
| 842 | /* |
| 843 | * Vnode pointer to File handle |
| 844 | */ |
| 845 | /* ARGSUSED */ |
| 846 | int |
| 847 | cd9660_vptofh(struct vnode *vp, struct fid *fhp, size_t *fh_size) |
| 848 | { |
| 849 | struct iso_node *ip = VTOI(vp); |
| 850 | struct ifid ifh; |
| 851 | |
| 852 | if (*fh_size < sizeof(struct ifid)) { |
| 853 | *fh_size = sizeof(struct ifid); |
| 854 | return E2BIG; |
| 855 | } |
| 856 | *fh_size = sizeof(struct ifid); |
| 857 | |
| 858 | memset(&ifh, 0, sizeof(ifh)); |
| 859 | ifh.ifid_len = sizeof(struct ifid); |
| 860 | ifh.ifid_ino = ip->i_number; |
| 861 | #ifdef ISOFS_DBG |
| 862 | ifh.ifid_start = ip->iso_start; |
| 863 | #endif |
| 864 | memcpy(fhp, &ifh, sizeof(ifh)); |
| 865 | |
| 866 | #ifdef ISOFS_DBG |
| 867 | printf("vptofh: ino %" PRIu64", start %lu\n" , |
| 868 | ifh.ifid_ino,ifh.ifid_start); |
| 869 | #endif |
| 870 | return 0; |
| 871 | } |
| 872 | |