| 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 | * %sccs.include.redist.c% |
| 11 | * |
| 12 | * @(#)cd9660_vfsops.c 8.13 (Berkeley) %G% |
| 13 | */ |
| 14 | |
| 15 | #include <sys/param.h> |
| 16 | #include <sys/systm.h> |
| 17 | #include <sys/namei.h> |
| 18 | #include <sys/proc.h> |
| 19 | #include <sys/kernel.h> |
| 20 | #include <sys/vnode.h> |
| 21 | #include <miscfs/specfs/specdev.h> |
| 22 | #include <sys/mount.h> |
| 23 | #include <sys/buf.h> |
| 24 | #include <sys/file.h> |
| 25 | #include <sys/dkbad.h> |
| 26 | #include <sys/disklabel.h> |
| 27 | #include <sys/ioctl.h> |
| 28 | #include <sys/errno.h> |
| 29 | #include <sys/malloc.h> |
| 30 | #include <sys/stat.h> |
| 31 | |
| 32 | #include <isofs/cd9660/iso.h> |
| 33 | #include <isofs/cd9660/cd9660_node.h> |
| 34 | #include <isofs/cd9660/cd9660_mount.h> |
| 35 | |
| 36 | extern int enodev (); |
| 37 | |
| 38 | struct vfsops cd9660_vfsops = { |
| 39 | cd9660_mount, |
| 40 | cd9660_start, |
| 41 | cd9660_unmount, |
| 42 | cd9660_root, |
| 43 | cd9660_quotactl, |
| 44 | cd9660_statfs, |
| 45 | cd9660_sync, |
| 46 | cd9660_vget, |
| 47 | cd9660_fhtovp, |
| 48 | cd9660_vptofh, |
| 49 | cd9660_init, |
| 50 | cd9660_sysctl |
| 51 | }; |
| 52 | |
| 53 | /* |
| 54 | * Called by vfs_mountroot when iso is going to be mounted as root. |
| 55 | * |
| 56 | * Name is updated by mount(8) after booting. |
| 57 | */ |
| 58 | #define ROOTNAME "root_device" |
| 59 | |
| 60 | static iso_mountfs(); |
| 61 | |
| 62 | cd9660_mountroot() |
| 63 | { |
| 64 | register struct mount *mp; |
| 65 | extern struct vnode *rootvp; |
| 66 | struct proc *p = curproc; /* XXX */ |
| 67 | struct iso_mnt *imp; |
| 68 | register struct fs *fs; |
| 69 | u_int size; |
| 70 | int error; |
| 71 | struct iso_args args; |
| 72 | |
| 73 | /* |
| 74 | * Get vnodes for swapdev and rootdev. |
| 75 | */ |
| 76 | if (bdevvp(swapdev, &swapdev_vp) || bdevvp(rootdev, &rootvp)) |
| 77 | panic("cd9660_mountroot: can't setup bdevvp's"); |
| 78 | |
| 79 | mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); |
| 80 | bzero((char *)mp, (u_long)sizeof(struct mount)); |
| 81 | mp->mnt_op = &cd9660_vfsops; |
| 82 | mp->mnt_flag = MNT_RDONLY; |
| 83 | LIST_INIT(&mp->mnt_vnodelist); |
| 84 | args.flags = ISOFSMNT_ROOT; |
| 85 | if (error = iso_mountfs(rootvp, mp, p, &args)) { |
| 86 | free(mp, M_MOUNT); |
| 87 | return (error); |
| 88 | } |
| 89 | if (error = vfs_lock(mp)) { |
| 90 | (void)cd9660_unmount(mp, 0, p); |
| 91 | free(mp, M_MOUNT); |
| 92 | return (error); |
| 93 | } |
| 94 | CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); |
| 95 | mp->mnt_vnodecovered = NULLVP; |
| 96 | imp = VFSTOISOFS(mp); |
| 97 | (void) copystr("/", mp->mnt_stat.f_mntonname, MNAMELEN - 1, |
| 98 | &size); |
| 99 | bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); |
| 100 | (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
| 101 | &size); |
| 102 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); |
| 103 | (void)cd9660_statfs(mp, &mp->mnt_stat, p); |
| 104 | vfs_unlock(mp); |
| 105 | return (0); |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * VFS Operations. |
| 110 | * |
| 111 | * mount system call |
| 112 | */ |
| 113 | cd9660_mount(mp, path, data, ndp, p) |
| 114 | register struct mount *mp; |
| 115 | char *path; |
| 116 | caddr_t data; |
| 117 | struct nameidata *ndp; |
| 118 | struct proc *p; |
| 119 | { |
| 120 | struct vnode *devvp; |
| 121 | struct iso_args args; |
| 122 | u_int size; |
| 123 | int error; |
| 124 | struct iso_mnt *imp; |
| 125 | |
| 126 | if (error = copyin(data, (caddr_t)&args, sizeof (struct iso_args))) |
| 127 | return (error); |
| 128 | |
| 129 | if ((mp->mnt_flag & MNT_RDONLY) == 0) |
| 130 | return (EROFS); |
| 131 | |
| 132 | /* |
| 133 | * If updating, check whether changing from read-only to |
| 134 | * read/write; if there is no device name, that's all we do. |
| 135 | */ |
| 136 | if (mp->mnt_flag & MNT_UPDATE) { |
| 137 | imp = VFSTOISOFS(mp); |
| 138 | if (args.fspec == 0) |
| 139 | return (vfs_export(mp, &imp->im_export, &args.export)); |
| 140 | } |
| 141 | /* |
| 142 | * Not an update, or updating the name: look up the name |
| 143 | * and verify that it refers to a sensible block device. |
| 144 | */ |
| 145 | NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); |
| 146 | if (error = namei(ndp)) |
| 147 | return (error); |
| 148 | devvp = ndp->ni_vp; |
| 149 | |
| 150 | if (devvp->v_type != VBLK) { |
| 151 | vrele(devvp); |
| 152 | return ENOTBLK; |
| 153 | } |
| 154 | if (major(devvp->v_rdev) >= nblkdev) { |
| 155 | vrele(devvp); |
| 156 | return ENXIO; |
| 157 | } |
| 158 | if ((mp->mnt_flag & MNT_UPDATE) == 0) |
| 159 | error = iso_mountfs(devvp, mp, p, &args); |
| 160 | else { |
| 161 | if (devvp != imp->im_devvp) |
| 162 | error = EINVAL; /* needs translation */ |
| 163 | else |
| 164 | vrele(devvp); |
| 165 | } |
| 166 | if (error) { |
| 167 | vrele(devvp); |
| 168 | return error; |
| 169 | } |
| 170 | imp = VFSTOISOFS(mp); |
| 171 | (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); |
| 172 | bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); |
| 173 | (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, |
| 174 | &size); |
| 175 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); |
| 176 | (void) cd9660_statfs(mp, &mp->mnt_stat, p); |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /* |
| 181 | * Common code for mount and mountroot |
| 182 | */ |
| 183 | static iso_mountfs(devvp, mp, p, argp) |
| 184 | register struct vnode *devvp; |
| 185 | struct mount *mp; |
| 186 | struct proc *p; |
| 187 | struct iso_args *argp; |
| 188 | { |
| 189 | register struct iso_mnt *isomp = (struct iso_mnt *)0; |
| 190 | struct buf *bp = NULL; |
| 191 | dev_t dev = devvp->v_rdev; |
| 192 | caddr_t base, space; |
| 193 | int havepart = 0, blks; |
| 194 | int error = EINVAL, i, size; |
| 195 | int needclose = 0; |
| 196 | int ronly = (mp->mnt_flag & MNT_RDONLY) != 0; |
| 197 | extern struct vnode *rootvp; |
| 198 | int j; |
| 199 | int iso_bsize; |
| 200 | int iso_blknum; |
| 201 | struct iso_volume_descriptor *vdp; |
| 202 | struct iso_primary_descriptor *pri; |
| 203 | struct iso_directory_record *rootp; |
| 204 | int logical_block_size; |
| 205 | |
| 206 | if (!ronly) |
| 207 | return EROFS; |
| 208 | |
| 209 | /* |
| 210 | * Disallow multiple mounts of the same device. |
| 211 | * Disallow mounting of a device that is currently in use |
| 212 | * (except for root, which might share swap device for miniroot). |
| 213 | * Flush out any old buffers remaining from a previous use. |
| 214 | */ |
| 215 | if (error = vfs_mountedon(devvp)) |
| 216 | return error; |
| 217 | if (vcount(devvp) > 1 && devvp != rootvp) |
| 218 | return EBUSY; |
| 219 | if (error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0)) |
| 220 | return (error); |
| 221 | |
| 222 | if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p)) |
| 223 | return error; |
| 224 | needclose = 1; |
| 225 | |
| 226 | /* This is the "logical sector size". The standard says this |
| 227 | * should be 2048 or the physical sector size on the device, |
| 228 | * whichever is greater. For now, we'll just use a constant. |
| 229 | */ |
| 230 | iso_bsize = ISO_DEFAULT_BLOCK_SIZE; |
| 231 | |
| 232 | for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) { |
| 233 | if (error = bread(devvp, iso_blknum * btodb(iso_bsize), |
| 234 | iso_bsize, NOCRED, &bp)) |
| 235 | goto out; |
| 236 | |
| 237 | vdp = (struct iso_volume_descriptor *)bp->b_data; |
| 238 | if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) { |
| 239 | error = EINVAL; |
| 240 | goto out; |
| 241 | } |
| 242 | |
| 243 | if (isonum_711 (vdp->type) == ISO_VD_END) { |
| 244 | error = EINVAL; |
| 245 | goto out; |
| 246 | } |
| 247 | |
| 248 | if (isonum_711 (vdp->type) == ISO_VD_PRIMARY) |
| 249 | break; |
| 250 | brelse(bp); |
| 251 | } |
| 252 | |
| 253 | if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) { |
| 254 | error = EINVAL; |
| 255 | goto out; |
| 256 | } |
| 257 | |
| 258 | pri = (struct iso_primary_descriptor *)vdp; |
| 259 | |
| 260 | logical_block_size = isonum_723 (pri->logical_block_size); |
| 261 | |
| 262 | if (logical_block_size < DEV_BSIZE || logical_block_size > MAXBSIZE |
| 263 | || (logical_block_size & (logical_block_size - 1)) != 0) { |
| 264 | error = EINVAL; |
| 265 | goto out; |
| 266 | } |
| 267 | |
| 268 | rootp = (struct iso_directory_record *)pri->root_directory_record; |
| 269 | |
| 270 | isomp = malloc(sizeof *isomp, M_ISOFSMNT, M_WAITOK); |
| 271 | bzero((caddr_t)isomp, sizeof *isomp); |
| 272 | isomp->logical_block_size = logical_block_size; |
| 273 | isomp->volume_space_size = isonum_733 (pri->volume_space_size); |
| 274 | bcopy (rootp, isomp->root, sizeof isomp->root); |
| 275 | isomp->root_extent = isonum_733 (rootp->extent); |
| 276 | isomp->root_size = isonum_733 (rootp->size); |
| 277 | |
| 278 | isomp->im_bmask = logical_block_size - 1; |
| 279 | isomp->im_bshift = 0; |
| 280 | while ((1 << isomp->im_bshift) < isomp->logical_block_size) |
| 281 | isomp->im_bshift++; |
| 282 | |
| 283 | bp->b_flags |= B_AGE; |
| 284 | brelse(bp); |
| 285 | bp = NULL; |
| 286 | |
| 287 | mp->mnt_data = (qaddr_t)isomp; |
| 288 | mp->mnt_stat.f_fsid.val[0] = (long)dev; |
| 289 | mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; |
| 290 | mp->mnt_maxsymlinklen = 0; |
| 291 | mp->mnt_flag |= MNT_LOCAL; |
| 292 | isomp->im_mountp = mp; |
| 293 | isomp->im_dev = dev; |
| 294 | isomp->im_devvp = devvp; |
| 295 | |
| 296 | devvp->v_specflags |= SI_MOUNTEDON; |
| 297 | |
| 298 | /* Check the Rock Ridge Extention support */ |
| 299 | if (!(argp->flags & ISOFSMNT_NORRIP)) { |
| 300 | if (error = bread(isomp->im_devvp, |
| 301 | (isomp->root_extent + isonum_711(rootp->ext_attr_length)) << |
| 302 | (isomp->im_bshift - DEV_BSHIFT), |
| 303 | isomp->logical_block_size, NOCRED, &bp)) |
| 304 | goto out; |
| 305 | |
| 306 | rootp = (struct iso_directory_record *)bp->b_data; |
| 307 | |
| 308 | if ((isomp->rr_skip = cd9660_rrip_offset(rootp,isomp)) < 0) { |
| 309 | argp->flags |= ISOFSMNT_NORRIP; |
| 310 | } else { |
| 311 | argp->flags &= ~ISOFSMNT_GENS; |
| 312 | } |
| 313 | |
| 314 | /* |
| 315 | * The contents are valid, |
| 316 | * but they will get reread as part of another vnode, so... |
| 317 | */ |
| 318 | bp->b_flags |= B_AGE; |
| 319 | brelse(bp); |
| 320 | bp = NULL; |
| 321 | } |
| 322 | isomp->im_flags = argp->flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS|ISOFSMNT_EXTATT); |
| 323 | switch (isomp->im_flags&(ISOFSMNT_NORRIP|ISOFSMNT_GENS)) { |
| 324 | default: |
| 325 | isomp->iso_ftype = ISO_FTYPE_DEFAULT; |
| 326 | break; |
| 327 | case ISOFSMNT_GENS|ISOFSMNT_NORRIP: |
| 328 | isomp->iso_ftype = ISO_FTYPE_9660; |
| 329 | break; |
| 330 | case 0: |
| 331 | isomp->iso_ftype = ISO_FTYPE_RRIP; |
| 332 | break; |
| 333 | } |
| 334 | |
| 335 | return 0; |
| 336 | out: |
| 337 | if (bp) |
| 338 | brelse(bp); |
| 339 | if (needclose) |
| 340 | (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p); |
| 341 | if (isomp) { |
| 342 | free((caddr_t)isomp, M_ISOFSMNT); |
| 343 | mp->mnt_data = (qaddr_t)0; |
| 344 | } |
| 345 | return error; |
| 346 | } |
| 347 | |
| 348 | /* |
| 349 | * Make a filesystem operational. |
| 350 | * Nothing to do at the moment. |
| 351 | */ |
| 352 | /* ARGSUSED */ |
| 353 | cd9660_start(mp, flags, p) |
| 354 | struct mount *mp; |
| 355 | int flags; |
| 356 | struct proc *p; |
| 357 | { |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * unmount system call |
| 363 | */ |
| 364 | int |
| 365 | cd9660_unmount(mp, mntflags, p) |
| 366 | struct mount *mp; |
| 367 | int mntflags; |
| 368 | struct proc *p; |
| 369 | { |
| 370 | register struct iso_mnt *isomp; |
| 371 | int i, error, ronly, flags = 0; |
| 372 | |
| 373 | if (mntflags & MNT_FORCE) |
| 374 | flags |= FORCECLOSE; |
| 375 | #if 0 |
| 376 | mntflushbuf(mp, 0); |
| 377 | if (mntinvalbuf(mp)) |
| 378 | return EBUSY; |
| 379 | #endif |
| 380 | if (error = vflush(mp, NULLVP, flags)) |
| 381 | return (error); |
| 382 | |
| 383 | isomp = VFSTOISOFS(mp); |
| 384 | |
| 385 | #ifdef ISODEVMAP |
| 386 | if (isomp->iso_ftype == ISO_FTYPE_RRIP) |
| 387 | iso_dunmap(isomp->im_dev); |
| 388 | #endif |
| 389 | |
| 390 | isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON; |
| 391 | error = VOP_CLOSE(isomp->im_devvp, FREAD, NOCRED, p); |
| 392 | vrele(isomp->im_devvp); |
| 393 | free((caddr_t)isomp, M_ISOFSMNT); |
| 394 | mp->mnt_data = (qaddr_t)0; |
| 395 | mp->mnt_flag &= ~MNT_LOCAL; |
| 396 | return (error); |
| 397 | } |
| 398 | |
| 399 | /* |
| 400 | * Return root of a filesystem |
| 401 | */ |
| 402 | cd9660_root(mp, vpp) |
| 403 | struct mount *mp; |
| 404 | struct vnode **vpp; |
| 405 | { |
| 406 | struct iso_mnt *imp = VFSTOISOFS(mp); |
| 407 | struct iso_directory_record *dp = |
| 408 | (struct iso_directory_record *)imp->root; |
| 409 | ino_t ino = isodirino(dp, imp); |
| 410 | |
| 411 | /* |
| 412 | * With RRIP we must use the `.' entry of the root directory. |
| 413 | * Simply tell vget, that it's a relocated directory. |
| 414 | */ |
| 415 | return (cd9660_vget_internal(mp, ino, vpp, |
| 416 | imp->iso_ftype == ISO_FTYPE_RRIP, dp)); |
| 417 | } |
| 418 | |
| 419 | /* |
| 420 | * Do operations associated with quotas, not supported |
| 421 | */ |
| 422 | /* ARGSUSED */ |
| 423 | int |
| 424 | cd9660_quotactl(mp, cmd, uid, arg, p) |
| 425 | struct mount *mp; |
| 426 | int cmd; |
| 427 | uid_t uid; |
| 428 | caddr_t arg; |
| 429 | struct proc *p; |
| 430 | { |
| 431 | |
| 432 | return (EOPNOTSUPP); |
| 433 | } |
| 434 | |
| 435 | /* |
| 436 | * Get file system statistics. |
| 437 | */ |
| 438 | cd9660_statfs(mp, sbp, p) |
| 439 | struct mount *mp; |
| 440 | register struct statfs *sbp; |
| 441 | struct proc *p; |
| 442 | { |
| 443 | register struct iso_mnt *isomp; |
| 444 | register struct fs *fs; |
| 445 | |
| 446 | isomp = VFSTOISOFS(mp); |
| 447 | |
| 448 | #ifdef COMPAT_09 |
| 449 | sbp->f_type = 5; |
| 450 | #else |
| 451 | sbp->f_type = 0; |
| 452 | #endif |
| 453 | sbp->f_bsize = isomp->logical_block_size; |
| 454 | sbp->f_iosize = sbp->f_bsize; /* XXX */ |
| 455 | sbp->f_blocks = isomp->volume_space_size; |
| 456 | sbp->f_bfree = 0; /* total free blocks */ |
| 457 | sbp->f_bavail = 0; /* blocks free for non superuser */ |
| 458 | sbp->f_files = 0; /* total files */ |
| 459 | sbp->f_ffree = 0; /* free file nodes */ |
| 460 | if (sbp != &mp->mnt_stat) { |
| 461 | bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); |
| 462 | bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); |
| 463 | } |
| 464 | /* Use the first spare for flags: */ |
| 465 | sbp->f_spare[0] = isomp->im_flags; |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | /* ARGSUSED */ |
| 470 | int |
| 471 | cd9660_sync(mp, waitfor, cred, p) |
| 472 | struct mount *mp; |
| 473 | int waitfor; |
| 474 | struct ucred *cred; |
| 475 | struct proc *p; |
| 476 | { |
| 477 | return (0); |
| 478 | } |
| 479 | |
| 480 | /* |
| 481 | * File handle to vnode |
| 482 | * |
| 483 | * Have to be really careful about stale file handles: |
| 484 | * - check that the inode number is in range |
| 485 | * - call iget() to get the locked inode |
| 486 | * - check for an unallocated inode (i_mode == 0) |
| 487 | * - check that the generation number matches |
| 488 | */ |
| 489 | |
| 490 | struct ifid { |
| 491 | ushort ifid_len; |
| 492 | ushort ifid_pad; |
| 493 | int ifid_ino; |
| 494 | long ifid_start; |
| 495 | }; |
| 496 | |
| 497 | /* ARGSUSED */ |
| 498 | int |
| 499 | cd9660_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) |
| 500 | register struct mount *mp; |
| 501 | struct fid *fhp; |
| 502 | struct mbuf *nam; |
| 503 | struct vnode **vpp; |
| 504 | int *exflagsp; |
| 505 | struct ucred **credanonp; |
| 506 | { |
| 507 | struct ifid *ifhp = (struct ifid *)fhp; |
| 508 | register struct iso_node *ip; |
| 509 | register struct netcred *np; |
| 510 | register struct iso_mnt *imp = VFSTOISOFS(mp); |
| 511 | struct vnode *nvp; |
| 512 | int error; |
| 513 | |
| 514 | #ifdef ISOFS_DBG |
| 515 | printf("fhtovp: ino %d, start %ld\n", |
| 516 | ifhp->ifid_ino, ifhp->ifid_start); |
| 517 | #endif |
| 518 | |
| 519 | /* |
| 520 | * Get the export permission structure for this <mp, client> tuple. |
| 521 | */ |
| 522 | np = vfs_export_lookup(mp, &imp->im_export, nam); |
| 523 | if (np == NULL) |
| 524 | return (EACCES); |
| 525 | |
| 526 | if (error = VFS_VGET(mp, ifhp->ifid_ino, &nvp)) { |
| 527 | *vpp = NULLVP; |
| 528 | return (error); |
| 529 | } |
| 530 | ip = VTOI(nvp); |
| 531 | if (ip->inode.iso_mode == 0) { |
| 532 | vput(nvp); |
| 533 | *vpp = NULLVP; |
| 534 | return (ESTALE); |
| 535 | } |
| 536 | *vpp = nvp; |
| 537 | *exflagsp = np->netc_exflags; |
| 538 | *credanonp = &np->netc_anon; |
| 539 | return (0); |
| 540 | } |
| 541 | |
| 542 | int |
| 543 | cd9660_vget(mp, ino, vpp) |
| 544 | struct mount *mp; |
| 545 | ino_t ino; |
| 546 | struct vnode **vpp; |
| 547 | { |
| 548 | |
| 549 | /* |
| 550 | * XXXX |
| 551 | * It would be nice if we didn't always set the `relocated' flag |
| 552 | * and force the extra read, but I don't want to think about fixing |
| 553 | * that right now. |
| 554 | */ |
| 555 | return (cd9660_vget_internal(mp, ino, vpp, |
| 556 | #if 0 |
| 557 | VFSTOISOFS(mp)->iso_ftype == ISO_FTYPE_RRIP, |
| 558 | #else |
| 559 | 0, |
| 560 | #endif |
| 561 | (struct iso_directory_entry *)0)); |
| 562 | } |
| 563 | |
| 564 | int |
| 565 | cd9660_vget_internal(mp, ino, vpp, relocated, isodir) |
| 566 | struct mount *mp; |
| 567 | ino_t ino; |
| 568 | struct vnode **vpp; |
| 569 | int relocated; |
| 570 | struct iso_directory_record *isodir; |
| 571 | { |
| 572 | register struct iso_mnt *imp; |
| 573 | struct iso_node *ip; |
| 574 | struct buf *bp; |
| 575 | struct vnode *vp, *nvp; |
| 576 | dev_t dev; |
| 577 | int error; |
| 578 | |
| 579 | imp = VFSTOISOFS(mp); |
| 580 | dev = imp->im_dev; |
| 581 | if ((*vpp = cd9660_ihashget(dev, ino)) != NULLVP) |
| 582 | return (0); |
| 583 | |
| 584 | /* Allocate a new vnode/iso_node. */ |
| 585 | if (error = getnewvnode(VT_ISOFS, mp, cd9660_vnodeop_p, &vp)) { |
| 586 | *vpp = NULLVP; |
| 587 | return (error); |
| 588 | } |
| 589 | MALLOC(ip, struct iso_node *, sizeof(struct iso_node), M_ISOFSNODE, |
| 590 | M_WAITOK); |
| 591 | bzero((caddr_t)ip, sizeof(struct iso_node)); |
| 592 | vp->v_data = ip; |
| 593 | ip->i_vnode = vp; |
| 594 | ip->i_dev = dev; |
| 595 | ip->i_number = ino; |
| 596 | |
| 597 | /* |
| 598 | * Put it onto its hash chain and lock it so that other requests for |
| 599 | * this inode will block if they arrive while we are sleeping waiting |
| 600 | * for old data structures to be purged or for the contents of the |
| 601 | * disk portion of this inode to be read. |
| 602 | */ |
| 603 | cd9660_ihashins(ip); |
| 604 | |
| 605 | if (isodir == 0) { |
| 606 | int lbn, off; |
| 607 | |
| 608 | lbn = lblkno(imp, ino); |
| 609 | if (lbn >= imp->volume_space_size) { |
| 610 | vput(vp); |
| 611 | printf("fhtovp: lbn exceed volume space %d\n", lbn); |
| 612 | return (ESTALE); |
| 613 | } |
| 614 | |
| 615 | off = blkoff(imp, ino); |
| 616 | if (off + ISO_DIRECTORY_RECORD_SIZE > imp->logical_block_size) { |
| 617 | vput(vp); |
| 618 | printf("fhtovp: crosses block boundary %d\n", |
| 619 | off + ISO_DIRECTORY_RECORD_SIZE); |
| 620 | return (ESTALE); |
| 621 | } |
| 622 | |
| 623 | error = bread(imp->im_devvp, |
| 624 | lbn << (imp->im_bshift - DEV_BSHIFT), |
| 625 | imp->logical_block_size, NOCRED, &bp); |
| 626 | if (error) { |
| 627 | vput(vp); |
| 628 | brelse(bp); |
| 629 | printf("fhtovp: bread error %d\n",error); |
| 630 | return (error); |
| 631 | } |
| 632 | isodir = (struct iso_directory_record *)(bp->b_data + off); |
| 633 | |
| 634 | if (off + isonum_711(isodir->length) > |
| 635 | imp->logical_block_size) { |
| 636 | vput(vp); |
| 637 | if (bp != 0) |
| 638 | brelse(bp); |
| 639 | printf("fhtovp: directory crosses block boundary %d[off=%d/len=%d]\n", |
| 640 | off +isonum_711(isodir->length), off, |
| 641 | isonum_711(isodir->length)); |
| 642 | return (ESTALE); |
| 643 | } |
| 644 | |
| 645 | #if 0 |
| 646 | if (isonum_733(isodir->extent) + |
| 647 | isonum_711(isodir->ext_attr_length) != ifhp->ifid_start) { |
| 648 | if (bp != 0) |
| 649 | brelse(bp); |
| 650 | printf("fhtovp: file start miss %d vs %d\n", |
| 651 | isonum_733(isodir->extent) + isonum_711(isodir->ext_attr_length), |
| 652 | ifhp->ifid_start); |
| 653 | return (ESTALE); |
| 654 | } |
| 655 | #endif |
| 656 | } else |
| 657 | bp = 0; |
| 658 | |
| 659 | ip->i_mnt = imp; |
| 660 | ip->i_devvp = imp->im_devvp; |
| 661 | VREF(ip->i_devvp); |
| 662 | |
| 663 | if (relocated) { |
| 664 | /* |
| 665 | * On relocated directories we must |
| 666 | * read the `.' entry out of a dir. |
| 667 | */ |
| 668 | ip->iso_start = ino >> imp->im_bshift; |
| 669 | if (bp != 0) |
| 670 | brelse(bp); |
| 671 | if (error = VOP_BLKATOFF(vp, (off_t)0, NULL, &bp)) { |
| 672 | vput(vp); |
| 673 | return (error); |
| 674 | } |
| 675 | isodir = (struct iso_directory_record *)bp->b_data; |
| 676 | } |
| 677 | |
| 678 | ip->iso_extent = isonum_733(isodir->extent); |
| 679 | ip->i_size = isonum_733(isodir->size); |
| 680 | ip->iso_start = isonum_711(isodir->ext_attr_length) + ip->iso_extent; |
| 681 | |
| 682 | /* |
| 683 | * Setup time stamp, attribute |
| 684 | */ |
| 685 | vp->v_type = VNON; |
| 686 | switch (imp->iso_ftype) { |
| 687 | default: /* ISO_FTYPE_9660 */ |
| 688 | { |
| 689 | struct buf *bp2; |
| 690 | int off; |
| 691 | if ((imp->im_flags & ISOFSMNT_EXTATT) |
| 692 | && (off = isonum_711(isodir->ext_attr_length))) |
| 693 | VOP_BLKATOFF(vp, (off_t)-(off << imp->im_bshift), NULL, |
| 694 | &bp2); |
| 695 | else |
| 696 | bp2 = NULL; |
| 697 | cd9660_defattr(isodir, ip, bp2); |
| 698 | cd9660_deftstamp(isodir, ip, bp2); |
| 699 | if (bp2) |
| 700 | brelse(bp2); |
| 701 | break; |
| 702 | } |
| 703 | case ISO_FTYPE_RRIP: |
| 704 | cd9660_rrip_analyze(isodir, ip, imp); |
| 705 | break; |
| 706 | } |
| 707 | |
| 708 | if (bp != 0) |
| 709 | brelse(bp); |
| 710 | |
| 711 | /* |
| 712 | * Initialize the associated vnode |
| 713 | */ |
| 714 | switch (vp->v_type = IFTOVT(ip->inode.iso_mode)) { |
| 715 | case VFIFO: |
| 716 | #ifdef FIFO |
| 717 | vp->v_op = cd9660_fifoop_p; |
| 718 | break; |
| 719 | #else |
| 720 | vput(vp); |
| 721 | return (EOPNOTSUPP); |
| 722 | #endif /* FIFO */ |
| 723 | case VCHR: |
| 724 | case VBLK: |
| 725 | /* |
| 726 | * if device, look at device number table for translation |
| 727 | */ |
| 728 | #ifdef ISODEVMAP |
| 729 | if (dp = iso_dmap(dev, ino, 0)) |
| 730 | ip->inode.iso_rdev = dp->d_dev; |
| 731 | #endif |
| 732 | vp->v_op = cd9660_specop_p; |
| 733 | if (nvp = checkalias(vp, ip->inode.iso_rdev, mp)) { |
| 734 | /* |
| 735 | * Discard unneeded vnode, but save its iso_node. |
| 736 | */ |
| 737 | cd9660_ihashrem(ip); |
| 738 | VOP_UNLOCK(vp); |
| 739 | nvp->v_data = vp->v_data; |
| 740 | vp->v_data = NULL; |
| 741 | vp->v_op = spec_vnodeop_p; |
| 742 | vrele(vp); |
| 743 | vgone(vp); |
| 744 | /* |
| 745 | * Reinitialize aliased inode. |
| 746 | */ |
| 747 | vp = nvp; |
| 748 | ip->i_vnode = vp; |
| 749 | cd9660_ihashins(ip); |
| 750 | } |
| 751 | break; |
| 752 | } |
| 753 | |
| 754 | if (ip->iso_extent == imp->root_extent) |
| 755 | vp->v_flag |= VROOT; |
| 756 | |
| 757 | /* |
| 758 | * XXX need generation number? |
| 759 | */ |
| 760 | |
| 761 | *vpp = vp; |
| 762 | return (0); |
| 763 | } |
| 764 | |
| 765 | /* |
| 766 | * Vnode pointer to File handle |
| 767 | */ |
| 768 | /* ARGSUSED */ |
| 769 | cd9660_vptofh(vp, fhp) |
| 770 | struct vnode *vp; |
| 771 | struct fid *fhp; |
| 772 | { |
| 773 | register struct iso_node *ip = VTOI(vp); |
| 774 | register struct ifid *ifhp; |
| 775 | register struct iso_mnt *mp = ip->i_mnt; |
| 776 | |
| 777 | ifhp = (struct ifid *)fhp; |
| 778 | ifhp->ifid_len = sizeof(struct ifid); |
| 779 | |
| 780 | ifhp->ifid_ino = ip->i_number; |
| 781 | ifhp->ifid_start = ip->iso_start; |
| 782 | |
| 783 | #ifdef ISOFS_DBG |
| 784 | printf("vptofh: ino %d, start %ld\n", |
| 785 | ifhp->ifid_ino,ifhp->ifid_start); |
| 786 | #endif |
| 787 | return 0; |
| 788 | } |