| 1 | /*- |
| 2 | * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org> |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 24 | * SUCH DAMAGE. |
| 25 | * |
| 26 | * $FreeBSD: src/sys/fs/udf/udf_vfsops.c,v 1.16 2003/11/05 06:56:08 scottl Exp $ |
| 27 | * $DragonFly: src/sys/vfs/udf/udf_vfsops.c,v 1.28 2008/09/17 21:44:25 dillon Exp $ |
| 28 | */ |
| 29 | |
| 30 | /* udf_vfsops.c */ |
| 31 | /* Implement the VFS side of things */ |
| 32 | |
| 33 | /* |
| 34 | * Ok, here's how it goes. The UDF specs are pretty clear on how each data |
| 35 | * structure is made up, but not very clear on how they relate to each other. |
| 36 | * Here is the skinny... This demostrates a filesystem with one file in the |
| 37 | * root directory. Subdirectories are treated just as normal files, but they |
| 38 | * have File Id Descriptors of their children as their file data. As for the |
| 39 | * Anchor Volume Descriptor Pointer, it can exist in two of the following three |
| 40 | * places: sector 256, sector n (the max sector of the disk), or sector |
| 41 | * n - 256. It's a pretty good bet that one will exist at sector 256 though. |
| 42 | * One caveat is unclosed CD media. For that, sector 256 cannot be written, |
| 43 | * so the Anchor Volume Descriptor Pointer can exist at sector 512 until the |
| 44 | * media is closed. |
| 45 | * |
| 46 | * Sector: |
| 47 | * 256: |
| 48 | * n: Anchor Volume Descriptor Pointer |
| 49 | * n - 256: | |
| 50 | * | |
| 51 | * |-->Main Volume Descriptor Sequence |
| 52 | * | | |
| 53 | * | | |
| 54 | * | |-->Logical Volume Descriptor |
| 55 | * | | |
| 56 | * |-->Partition Descriptor | |
| 57 | * | | |
| 58 | * | | |
| 59 | * |-->Fileset Descriptor |
| 60 | * | |
| 61 | * | |
| 62 | * |-->Root Dir File Entry |
| 63 | * | |
| 64 | * | |
| 65 | * |-->File data: |
| 66 | * File Id Descriptor |
| 67 | * | |
| 68 | * | |
| 69 | * |-->File Entry |
| 70 | * | |
| 71 | * | |
| 72 | * |-->File data |
| 73 | */ |
| 74 | |
| 75 | #include <sys/types.h> |
| 76 | #include <sys/param.h> |
| 77 | #include <sys/systm.h> |
| 78 | #include <sys/uio.h> |
| 79 | #include <sys/buf.h> |
| 80 | #include <sys/conf.h> |
| 81 | #include <sys/fcntl.h> |
| 82 | #include <sys/module.h> |
| 83 | #include <sys/kernel.h> |
| 84 | #include <sys/malloc.h> |
| 85 | #include <sys/mount.h> |
| 86 | #include <sys/nlookup.h> |
| 87 | #include <sys/proc.h> |
| 88 | #include <sys/priv.h> |
| 89 | #include <sys/queue.h> |
| 90 | #include <sys/vnode.h> |
| 91 | |
| 92 | #include <vfs/udf/ecma167-udf.h> |
| 93 | #include <vfs/udf/osta.h> |
| 94 | #include <vfs/udf/udf.h> |
| 95 | #include <vfs/udf/udf_mount.h> |
| 96 | |
| 97 | extern struct vop_ops udf_vnode_vops; |
| 98 | |
| 99 | MALLOC_DEFINE(M_UDFNODE, "UDF node", "UDF node structure"); |
| 100 | MALLOC_DEFINE(M_UDFMOUNT, "UDF mount", "UDF mount structure"); |
| 101 | MALLOC_DEFINE(M_UDFFENTRY, "UDF fentry", "UDF file entry structure"); |
| 102 | |
| 103 | static int udf_mount(struct mount *, char *, caddr_t, struct ucred *); |
| 104 | static int udf_unmount(struct mount *, int); |
| 105 | static int udf_root(struct mount *, struct vnode **); |
| 106 | static int udf_statfs(struct mount *, struct statfs *, struct ucred *); |
| 107 | static int udf_fhtovp(struct mount *, struct vnode *, |
| 108 | struct fid *, struct vnode **); |
| 109 | static int udf_vptofh(struct vnode *, struct fid *); |
| 110 | |
| 111 | static int udf_find_partmaps(struct udf_mnt *, struct logvol_desc *); |
| 112 | |
| 113 | static struct vfsops udf_vfsops = { |
| 114 | .vfs_mount = udf_mount, |
| 115 | .vfs_unmount = udf_unmount, |
| 116 | .vfs_root = udf_root, |
| 117 | .vfs_statfs = udf_statfs, |
| 118 | .vfs_sync = vfs_stdsync, |
| 119 | .vfs_vget = udf_vget, |
| 120 | .vfs_fhtovp = udf_fhtovp, |
| 121 | .vfs_vptofh = udf_vptofh |
| 122 | }; |
| 123 | VFS_SET(udf_vfsops, udf, VFCF_READONLY); |
| 124 | |
| 125 | MODULE_VERSION(udf, 1); |
| 126 | |
| 127 | static int udf_mountfs(struct vnode *, struct mount *); |
| 128 | |
| 129 | static int |
| 130 | udf_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) |
| 131 | { |
| 132 | struct vnode *devvp; /* vnode of the mount device */ |
| 133 | struct udf_args args; |
| 134 | struct udf_mnt *imp = 0; |
| 135 | size_t size; |
| 136 | int error; |
| 137 | struct nlookupdata nd; |
| 138 | |
| 139 | if ((mp->mnt_flag & MNT_RDONLY) == 0) |
| 140 | return (EROFS); |
| 141 | |
| 142 | /* |
| 143 | * No root filesystem support. Probably not a big deal, since the |
| 144 | * bootloader doesn't understand UDF. |
| 145 | */ |
| 146 | if (mp->mnt_flag & MNT_ROOTFS) |
| 147 | return (ENOTSUP); |
| 148 | |
| 149 | if ((error = copyin(data, (caddr_t)&args, sizeof(struct udf_args)))) |
| 150 | return(error); |
| 151 | |
| 152 | if (mp->mnt_flag & MNT_UPDATE) { |
| 153 | imp = VFSTOUDFFS(mp); |
| 154 | if (args.fspec == NULL) |
| 155 | return(vfs_export(mp, &imp->im_export, &args.export)); |
| 156 | } |
| 157 | |
| 158 | /* Check that the mount device exists */ |
| 159 | devvp = NULL; |
| 160 | error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); |
| 161 | if (error == 0) |
| 162 | error = nlookup(&nd); |
| 163 | if (error == 0) |
| 164 | error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); |
| 165 | nlookup_done(&nd); |
| 166 | if (error) |
| 167 | return (error); |
| 168 | |
| 169 | if (vn_isdisk(devvp, &error) == 0) { |
| 170 | vrele(devvp); |
| 171 | return(error); |
| 172 | } |
| 173 | |
| 174 | /* Check the access rights on the mount device */ |
| 175 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 176 | error = VOP_EACCESS(devvp, VREAD, cred); |
| 177 | if (error) |
| 178 | error = priv_check_cred(cred, PRIV_ROOT, 0); |
| 179 | if (error) { |
| 180 | vput(devvp); |
| 181 | return(error); |
| 182 | } |
| 183 | vn_unlock(devvp); |
| 184 | |
| 185 | if ((error = udf_mountfs(devvp, mp))) { |
| 186 | vrele(devvp); |
| 187 | return(error); |
| 188 | } |
| 189 | |
| 190 | imp = VFSTOUDFFS(mp); |
| 191 | |
| 192 | imp->im_flags = args.flags; |
| 193 | |
| 194 | copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); |
| 195 | bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); |
| 196 | udf_statfs(mp, &mp->mnt_stat, cred); |
| 197 | return(0); |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Check the descriptor tag for both the correct id and correct checksum. |
| 202 | * Return zero if all is good, EINVAL if not. |
| 203 | */ |
| 204 | int |
| 205 | udf_checktag(struct desc_tag *tag, uint16_t id) |
| 206 | { |
| 207 | uint8_t *itag; |
| 208 | uint8_t i, cksum = 0; |
| 209 | |
| 210 | itag = (uint8_t *)tag; |
| 211 | |
| 212 | if (tag->id != id) |
| 213 | return(EINVAL); |
| 214 | |
| 215 | for (i = 0; i < 15; i++) |
| 216 | cksum = cksum + itag[i]; |
| 217 | cksum = cksum - itag[4]; |
| 218 | |
| 219 | if (cksum == tag->cksum) |
| 220 | return(0); |
| 221 | |
| 222 | return(EINVAL); |
| 223 | } |
| 224 | |
| 225 | static int |
| 226 | udf_mountfs(struct vnode *devvp, struct mount *mp) |
| 227 | { |
| 228 | struct buf *bp = NULL; |
| 229 | struct anchor_vdp avdp; |
| 230 | struct udf_mnt *udfmp = NULL; |
| 231 | struct part_desc *pd; |
| 232 | struct logvol_desc *lvd; |
| 233 | struct fileset_desc *fsd; |
| 234 | struct file_entry *root_fentry; |
| 235 | cdev_t dev; |
| 236 | uint32_t sector, size, mvds_start, mvds_end; |
| 237 | uint32_t fsd_offset = 0; |
| 238 | uint16_t part_num = 0, fsd_part = 0; |
| 239 | int error = EINVAL, needclose = 0; |
| 240 | int logvol_found = 0, part_found = 0, fsd_found = 0; |
| 241 | int bsize; |
| 242 | |
| 243 | /* |
| 244 | * Disallow multiple mounts of the same device. Flush the buffer |
| 245 | * cache for the device. |
| 246 | */ |
| 247 | if ((error = vfs_mountedon(devvp))) |
| 248 | return(error); |
| 249 | if (vcount(devvp) > 0) |
| 250 | return(EBUSY); |
| 251 | if ((error = vinvalbuf(devvp, V_SAVE, 0, 0))) |
| 252 | return(error); |
| 253 | |
| 254 | vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); |
| 255 | error = VOP_OPEN(devvp, FREAD, FSCRED, NULL); |
| 256 | vn_unlock(devvp); |
| 257 | if (error) |
| 258 | return(error); |
| 259 | needclose = 1; |
| 260 | dev = devvp->v_rdev; |
| 261 | |
| 262 | udfmp = kmalloc(sizeof(*udfmp), M_UDFMOUNT, M_WAITOK | M_ZERO); |
| 263 | |
| 264 | mp->mnt_data = (qaddr_t)udfmp; |
| 265 | mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); |
| 266 | mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; |
| 267 | mp->mnt_maxsymlinklen = 0; |
| 268 | mp->mnt_flag |= MNT_LOCAL; |
| 269 | udfmp->im_mountp = mp; |
| 270 | udfmp->im_dev = dev; |
| 271 | udfmp->im_devvp = devvp; |
| 272 | |
| 273 | bsize = 2048; /* XXX Should probe the media for it's size */ |
| 274 | |
| 275 | /* |
| 276 | * Get the Anchor Volume Descriptor Pointer from sector 256. |
| 277 | * XXX Should also check sector n - 256, n, and 512. |
| 278 | */ |
| 279 | sector = 256; |
| 280 | if ((error = bread(devvp, (off_t)sector * bsize, bsize, &bp)) != 0) |
| 281 | goto bail; |
| 282 | if ((error = udf_checktag((struct desc_tag *)bp->b_data, TAGID_ANCHOR))) |
| 283 | goto bail; |
| 284 | |
| 285 | bcopy(bp->b_data, &avdp, sizeof(struct anchor_vdp)); |
| 286 | brelse(bp); |
| 287 | bp = NULL; |
| 288 | |
| 289 | /* |
| 290 | * Extract the Partition Descriptor and Logical Volume Descriptor |
| 291 | * from the Volume Descriptor Sequence. |
| 292 | * XXX Should we care about the partition type right now? |
| 293 | * XXX What about multiple partitions? |
| 294 | */ |
| 295 | mvds_start = avdp.main_vds_ex.loc; |
| 296 | mvds_end = mvds_start + (avdp.main_vds_ex.len - 1) / bsize; |
| 297 | for (sector = mvds_start; sector < mvds_end; sector++) { |
| 298 | if ((error = bread(devvp, (off_t)sector * bsize, bsize, |
| 299 | &bp)) != 0) { |
| 300 | kprintf("Can't read sector %d of VDS\n", sector); |
| 301 | goto bail; |
| 302 | } |
| 303 | lvd = (struct logvol_desc *)bp->b_data; |
| 304 | if (!udf_checktag(&lvd->tag, TAGID_LOGVOL)) { |
| 305 | udfmp->bsize = lvd->lb_size; |
| 306 | udfmp->bmask = udfmp->bsize - 1; |
| 307 | udfmp->bshift = ffs(udfmp->bsize) - 1; |
| 308 | fsd_part = lvd->_lvd_use.fsd_loc.loc.part_num; |
| 309 | fsd_offset = lvd->_lvd_use.fsd_loc.loc.lb_num; |
| 310 | if (udf_find_partmaps(udfmp, lvd)) |
| 311 | break; |
| 312 | logvol_found = 1; |
| 313 | } |
| 314 | pd = (struct part_desc *)bp->b_data; |
| 315 | if (!udf_checktag(&pd->tag, TAGID_PARTITION)) { |
| 316 | part_found = 1; |
| 317 | part_num = pd->part_num; |
| 318 | udfmp->part_len = pd->part_len; |
| 319 | udfmp->part_start = pd->start_loc; |
| 320 | } |
| 321 | |
| 322 | brelse(bp); |
| 323 | bp = NULL; |
| 324 | if ((part_found) && (logvol_found)) |
| 325 | break; |
| 326 | } |
| 327 | |
| 328 | if (!part_found || !logvol_found) { |
| 329 | error = EINVAL; |
| 330 | goto bail; |
| 331 | } |
| 332 | |
| 333 | if (fsd_part != part_num) { |
| 334 | kprintf("FSD does not lie within the partition!\n"); |
| 335 | error = EINVAL; |
| 336 | goto bail; |
| 337 | } |
| 338 | |
| 339 | |
| 340 | /* |
| 341 | * Grab the Fileset Descriptor |
| 342 | * Thanks to Chuck McCrobie <mccrobie@cablespeed.com> for pointing |
| 343 | * me in the right direction here. |
| 344 | */ |
| 345 | sector = udfmp->part_start + fsd_offset; |
| 346 | if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { |
| 347 | kprintf("Cannot read sector %d of FSD\n", sector); |
| 348 | goto bail; |
| 349 | } |
| 350 | fsd = (struct fileset_desc *)bp->b_data; |
| 351 | if (!udf_checktag(&fsd->tag, TAGID_FSD)) { |
| 352 | fsd_found = 1; |
| 353 | bcopy(&fsd->rootdir_icb, &udfmp->root_icb, |
| 354 | sizeof(struct long_ad)); |
| 355 | } |
| 356 | |
| 357 | brelse(bp); |
| 358 | bp = NULL; |
| 359 | |
| 360 | if (!fsd_found) { |
| 361 | kprintf("Couldn't find the fsd\n"); |
| 362 | error = EINVAL; |
| 363 | goto bail; |
| 364 | } |
| 365 | |
| 366 | vfs_add_vnodeops(mp, &udf_vnode_vops, &mp->mnt_vn_norm_ops); |
| 367 | |
| 368 | /* |
| 369 | * Find the file entry for the root directory. |
| 370 | */ |
| 371 | sector = udfmp->root_icb.loc.lb_num + udfmp->part_start; |
| 372 | size = udfmp->root_icb.len; |
| 373 | if ((error = udf_readlblks(udfmp, sector, size, &bp)) != 0) { |
| 374 | kprintf("Cannot read sector %d\n", sector); |
| 375 | goto bail; |
| 376 | } |
| 377 | |
| 378 | root_fentry = (struct file_entry *)bp->b_data; |
| 379 | if ((error = udf_checktag(&root_fentry->tag, TAGID_FENTRY))) { |
| 380 | kprintf("Invalid root file entry!\n"); |
| 381 | goto bail; |
| 382 | } |
| 383 | |
| 384 | brelse(bp); |
| 385 | bp = NULL; |
| 386 | |
| 387 | lwkt_token_init(&udfmp->hash_token, 1); |
| 388 | udfmp->hashtbl = phashinit(UDF_HASHTBLSIZE, M_UDFMOUNT, &udfmp->hashsz); |
| 389 | |
| 390 | return(0); |
| 391 | |
| 392 | bail: |
| 393 | if (udfmp != NULL) |
| 394 | kfree(udfmp, M_UDFMOUNT); |
| 395 | if (bp != NULL) |
| 396 | brelse(bp); |
| 397 | if (needclose) |
| 398 | VOP_CLOSE(devvp, FREAD); |
| 399 | return(error); |
| 400 | } |
| 401 | |
| 402 | static int |
| 403 | udf_unmount(struct mount *mp, int mntflags) |
| 404 | { |
| 405 | struct udf_mnt *udfmp; |
| 406 | int error, flags = 0; |
| 407 | |
| 408 | udfmp = VFSTOUDFFS(mp); |
| 409 | |
| 410 | if (mntflags & MNT_FORCE) |
| 411 | flags |= FORCECLOSE; |
| 412 | |
| 413 | if ((error = vflush(mp, 0, flags))) |
| 414 | return (error); |
| 415 | |
| 416 | udfmp->im_devvp->v_rdev->si_mountpoint = NULL; |
| 417 | error = VOP_CLOSE(udfmp->im_devvp, FREAD); |
| 418 | vrele(udfmp->im_devvp); |
| 419 | |
| 420 | if (udfmp->s_table) |
| 421 | kfree(udfmp->s_table, M_UDFMOUNT); |
| 422 | if (udfmp->hashtbl) |
| 423 | kfree(udfmp->hashtbl, M_UDFMOUNT); |
| 424 | kfree(udfmp, M_UDFMOUNT); |
| 425 | |
| 426 | mp->mnt_data = (qaddr_t)0; |
| 427 | mp->mnt_flag &= ~MNT_LOCAL; |
| 428 | |
| 429 | return (error); |
| 430 | } |
| 431 | |
| 432 | static int |
| 433 | udf_root(struct mount *mp, struct vnode **vpp) |
| 434 | { |
| 435 | struct udf_mnt *udfmp; |
| 436 | struct vnode *vp; |
| 437 | ino_t id; |
| 438 | int error; |
| 439 | |
| 440 | udfmp = VFSTOUDFFS(mp); |
| 441 | |
| 442 | id = udf_getid(&udfmp->root_icb); |
| 443 | |
| 444 | error = udf_vget(mp, NULL, id, vpp); |
| 445 | if (error) |
| 446 | return(error); |
| 447 | |
| 448 | vp = *vpp; |
| 449 | vsetflags(vp, VROOT); |
| 450 | udfmp->root_vp = vp; |
| 451 | |
| 452 | return(0); |
| 453 | } |
| 454 | |
| 455 | static int |
| 456 | udf_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) |
| 457 | { |
| 458 | struct udf_mnt *udfmp; |
| 459 | |
| 460 | udfmp = VFSTOUDFFS(mp); |
| 461 | |
| 462 | sbp->f_bsize = udfmp->bsize; |
| 463 | sbp->f_iosize = udfmp->bsize; |
| 464 | sbp->f_blocks = udfmp->part_len; |
| 465 | sbp->f_bfree = 0; |
| 466 | sbp->f_bavail = 0; |
| 467 | sbp->f_files = 0; |
| 468 | sbp->f_ffree = 0; |
| 469 | if (sbp != &mp->mnt_stat) { |
| 470 | sbp->f_type = mp->mnt_vfc->vfc_typenum; |
| 471 | bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); |
| 472 | } |
| 473 | |
| 474 | return(0); |
| 475 | } |
| 476 | |
| 477 | int |
| 478 | udf_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp) |
| 479 | { |
| 480 | struct buf *bp; |
| 481 | struct vnode *devvp; |
| 482 | struct udf_mnt *udfmp; |
| 483 | struct thread *td; |
| 484 | struct vnode *vp; |
| 485 | struct udf_node *unode; |
| 486 | struct file_entry *fe; |
| 487 | int error, sector, size; |
| 488 | |
| 489 | td = curthread; |
| 490 | udfmp = VFSTOUDFFS(mp); |
| 491 | |
| 492 | /* See if we already have this in the cache */ |
| 493 | if ((error = udf_hashlookup(udfmp, ino, vpp)) != 0) |
| 494 | return(error); |
| 495 | if (*vpp != NULL) { |
| 496 | return(0); |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Allocate memory and check the tag id's before grabbing a new |
| 501 | * vnode, since it's hard to roll back if there is a problem. |
| 502 | */ |
| 503 | unode = kmalloc(sizeof(*unode), M_UDFNODE, M_WAITOK | M_ZERO); |
| 504 | |
| 505 | /* |
| 506 | * Copy in the file entry. Per the spec, the size can only be 1 block. |
| 507 | */ |
| 508 | sector = ino + udfmp->part_start; |
| 509 | devvp = udfmp->im_devvp; |
| 510 | if ((error = RDSECTOR(devvp, sector, udfmp->bsize, &bp)) != 0) { |
| 511 | kprintf("Cannot read sector %d\n", sector); |
| 512 | kfree(unode, M_UDFNODE); |
| 513 | return(error); |
| 514 | } |
| 515 | |
| 516 | fe = (struct file_entry *)bp->b_data; |
| 517 | if (udf_checktag(&fe->tag, TAGID_FENTRY)) { |
| 518 | kprintf("Invalid file entry!\n"); |
| 519 | kfree(unode, M_UDFNODE); |
| 520 | brelse(bp); |
| 521 | return(ENOMEM); |
| 522 | } |
| 523 | size = UDF_FENTRY_SIZE + fe->l_ea + fe->l_ad; |
| 524 | unode->fentry = kmalloc(size, M_UDFFENTRY, M_WAITOK | M_ZERO); |
| 525 | |
| 526 | bcopy(bp->b_data, unode->fentry, size); |
| 527 | |
| 528 | brelse(bp); |
| 529 | bp = NULL; |
| 530 | |
| 531 | if ((error = udf_allocv(mp, &vp))) { |
| 532 | kprintf("Error from udf_allocv\n"); |
| 533 | kfree(unode, M_UDFNODE); |
| 534 | return(error); |
| 535 | } |
| 536 | |
| 537 | unode->i_vnode = vp; |
| 538 | unode->hash_id = ino; |
| 539 | unode->i_devvp = udfmp->im_devvp; |
| 540 | unode->i_dev = udfmp->im_dev; |
| 541 | unode->udfmp = udfmp; |
| 542 | vp->v_data = unode; |
| 543 | vref(udfmp->im_devvp); |
| 544 | udf_hashins(unode); |
| 545 | |
| 546 | switch (unode->fentry->icbtag.file_type) { |
| 547 | default: |
| 548 | vp->v_type = VBAD; |
| 549 | break; |
| 550 | case 4: |
| 551 | vp->v_type = VDIR; |
| 552 | break; |
| 553 | case 5: |
| 554 | vp->v_type = VREG; |
| 555 | break; |
| 556 | case 6: |
| 557 | vp->v_type = VBLK; |
| 558 | break; |
| 559 | case 7: |
| 560 | vp->v_type = VCHR; |
| 561 | break; |
| 562 | case 9: |
| 563 | vp->v_type = VFIFO; |
| 564 | break; |
| 565 | case 10: |
| 566 | vp->v_type = VSOCK; |
| 567 | break; |
| 568 | case 12: |
| 569 | vp->v_type = VLNK; |
| 570 | break; |
| 571 | } |
| 572 | /* |
| 573 | * Locked and refd vnode returned |
| 574 | */ |
| 575 | *vpp = vp; |
| 576 | |
| 577 | return(0); |
| 578 | } |
| 579 | |
| 580 | struct ifid { |
| 581 | u_short ifid_len; |
| 582 | u_short ifid_pad; |
| 583 | int ifid_ino; |
| 584 | long ifid_start; |
| 585 | }; |
| 586 | |
| 587 | static int |
| 588 | udf_fhtovp(struct mount *mp, struct vnode *rootvp, |
| 589 | struct fid *fhp, struct vnode **vpp) |
| 590 | { |
| 591 | struct ifid *ifhp; |
| 592 | struct vnode *nvp; |
| 593 | int error; |
| 594 | |
| 595 | ifhp = (struct ifid *)fhp; |
| 596 | |
| 597 | if ((error = VFS_VGET(mp, NULL, ifhp->ifid_ino, &nvp)) != 0) { |
| 598 | *vpp = NULLVP; |
| 599 | return(error); |
| 600 | } |
| 601 | |
| 602 | *vpp = nvp; |
| 603 | return(0); |
| 604 | } |
| 605 | |
| 606 | static int |
| 607 | udf_vptofh (struct vnode *vp, struct fid *fhp) |
| 608 | { |
| 609 | struct udf_node *node; |
| 610 | struct ifid *ifhp; |
| 611 | |
| 612 | node = VTON(vp); |
| 613 | ifhp = (struct ifid *)fhp; |
| 614 | ifhp->ifid_len = sizeof(struct ifid); |
| 615 | ifhp->ifid_ino = node->hash_id; |
| 616 | |
| 617 | return(0); |
| 618 | } |
| 619 | |
| 620 | static int |
| 621 | udf_find_partmaps(struct udf_mnt *udfmp, struct logvol_desc *lvd) |
| 622 | { |
| 623 | union udf_pmap *pmap; |
| 624 | struct part_map_spare *pms; |
| 625 | struct regid *pmap_id; |
| 626 | struct buf *bp; |
| 627 | unsigned char regid_id[UDF_REGID_ID_SIZE + 1]; |
| 628 | int ptype, psize, error; |
| 629 | unsigned int i; |
| 630 | |
| 631 | for (i = 0; i < lvd->n_pm; i++) { |
| 632 | pmap = (union udf_pmap *)&lvd->maps[i * UDF_PMAP_SIZE]; |
| 633 | ptype = pmap->data[0]; |
| 634 | psize = pmap->data[1]; |
| 635 | if (((ptype != 1) && (ptype != 2)) || |
| 636 | ((psize != UDF_PMAP_SIZE) && (psize != 6))) { |
| 637 | kprintf("Invalid partition map found\n"); |
| 638 | return(1); |
| 639 | } |
| 640 | |
| 641 | if (ptype == 1) { |
| 642 | /* Type 1 map. We don't care */ |
| 643 | continue; |
| 644 | } |
| 645 | |
| 646 | /* Type 2 map. Gotta find out the details */ |
| 647 | pmap_id = (struct regid *)&pmap->data[4]; |
| 648 | bzero(®id_id[0], UDF_REGID_ID_SIZE); |
| 649 | bcopy(&pmap_id->id[0], ®id_id[0], UDF_REGID_ID_SIZE); |
| 650 | |
| 651 | if (bcmp(®id_id[0], "*UDF Sparable Partition", |
| 652 | UDF_REGID_ID_SIZE)) { |
| 653 | kprintf("Unsupported partition map: %s\n", ®id_id[0]); |
| 654 | return(1); |
| 655 | } |
| 656 | |
| 657 | pms = &pmap->pms; |
| 658 | udfmp->s_table = kmalloc(pms->st_size, M_UDFMOUNT, |
| 659 | M_WAITOK | M_ZERO); |
| 660 | |
| 661 | /* Calculate the number of sectors per packet. */ |
| 662 | /* XXX Logical or physical? */ |
| 663 | udfmp->p_sectors = pms->packet_len / udfmp->bsize; |
| 664 | |
| 665 | /* |
| 666 | * XXX If reading the first Sparing Table fails, should look |
| 667 | * for another table. |
| 668 | */ |
| 669 | if ((error = udf_readlblks(udfmp, pms->st_loc[0], pms->st_size, |
| 670 | &bp)) != 0) { |
| 671 | if (bp) |
| 672 | brelse(bp); |
| 673 | kprintf("Failed to read Sparing Table at sector %d\n", |
| 674 | pms->st_loc[0]); |
| 675 | return(error); |
| 676 | } |
| 677 | bcopy(bp->b_data, udfmp->s_table, pms->st_size); |
| 678 | brelse(bp); |
| 679 | |
| 680 | if (udf_checktag(&udfmp->s_table->tag, 0)) { |
| 681 | kprintf("Invalid sparing table found\n"); |
| 682 | return(EINVAL); |
| 683 | } |
| 684 | |
| 685 | /* See how many valid entries there are here. The list is |
| 686 | * supposed to be sorted. 0xfffffff0 and higher are not valid |
| 687 | */ |
| 688 | for (i = 0; i < udfmp->s_table->rt_l; i++) { |
| 689 | udfmp->s_table_entries = i; |
| 690 | if (udfmp->s_table->entries[i].org >= 0xfffffff0) |
| 691 | break; |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | return(0); |
| 696 | } |