1 /* 2 * linux/fs/isofs/inode.c 3 * 4 * (C) 1991 Linus Torvalds - minix filesystem 5 * 1992, 1993, 1994 Eric Youngdale Modified for ISO 9660 filesystem. 6 * 1994 Eberhard Moenkeberg - multi session handling. 7 * 1995 Mark Dobie - allow mounting of some weird VideoCDs and PhotoCDs. 8 * 1997 Gordon Chaffee - Joliet CDs 9 * 1998 Eric Lammerts - ISO 9660 Level 3 10 * 2004 Paul Serice - Inode Support pushed out from 4GB to 128GB 11 * 2004 Paul Serice - NFS Export Operations 12 */ 13 14 #include <linux/init.h> 15 #include <linux/module.h> 16 17 #include <linux/slab.h> 18 #include <linux/nls.h> 19 #include <linux/ctype.h> 20 #include <linux/smp_lock.h> 21 #include <linux/statfs.h> 22 #include <linux/cdrom.h> 23 #include <linux/parser.h> 24 25 #include "isofs.h" 26 #include "zisofs.h" 27 28 #define BEQUIET 29 30 static int isofs_hashi(struct dentry *parent, struct qstr *qstr); 31 static int isofs_hash(struct dentry *parent, struct qstr *qstr); 32 static int isofs_dentry_cmpi(struct dentry *dentry, struct qstr *a, struct qstr *b); 33 static int isofs_dentry_cmp(struct dentry *dentry, struct qstr *a, struct qstr *b); 34 35 #ifdef CONFIG_JOLIET 36 static int isofs_hashi_ms(struct dentry *parent, struct qstr *qstr); 37 static int isofs_hash_ms(struct dentry *parent, struct qstr *qstr); 38 static int isofs_dentry_cmpi_ms(struct dentry *dentry, struct qstr *a, struct qstr *b); 39 static int isofs_dentry_cmp_ms(struct dentry *dentry, struct qstr *a, struct qstr *b); 40 #endif 41 42 static void isofs_put_super(struct super_block *sb) 43 { 44 struct isofs_sb_info *sbi = ISOFS_SB(sb); 45 #ifdef CONFIG_JOLIET 46 if (sbi->s_nls_iocharset) { 47 unload_nls(sbi->s_nls_iocharset); 48 sbi->s_nls_iocharset = NULL; 49 } 50 #endif 51 52 kfree(sbi); 53 sb->s_fs_info = NULL; 54 return; 55 } 56 57 static void isofs_read_inode(struct inode *); 58 static int isofs_statfs (struct dentry *, struct kstatfs *); 59 60 static struct kmem_cache *isofs_inode_cachep; 61 62 static struct inode *isofs_alloc_inode(struct super_block *sb) 63 { 64 struct iso_inode_info *ei; 65 ei = kmem_cache_alloc(isofs_inode_cachep, GFP_KERNEL); 66 if (!ei) 67 return NULL; 68 return &ei->vfs_inode; 69 } 70 71 static void isofs_destroy_inode(struct inode *inode) 72 { 73 kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode)); 74 } 75 76 static void init_once(void *foo, struct kmem_cache *cachep, unsigned long flags) 77 { 78 struct iso_inode_info *ei = foo; 79 80 inode_init_once(&ei->vfs_inode); 81 } 82 83 static int init_inodecache(void) 84 { 85 isofs_inode_cachep = kmem_cache_create("isofs_inode_cache", 86 sizeof(struct iso_inode_info), 87 0, (SLAB_RECLAIM_ACCOUNT| 88 SLAB_MEM_SPREAD), 89 init_once); 90 if (isofs_inode_cachep == NULL) 91 return -ENOMEM; 92 return 0; 93 } 94 95 static void destroy_inodecache(void) 96 { 97 kmem_cache_destroy(isofs_inode_cachep); 98 } 99 100 static int isofs_remount(struct super_block *sb, int *flags, char *data) 101 { 102 /* we probably want a lot more here */ 103 *flags |= MS_RDONLY; 104 return 0; 105 } 106 107 static const struct super_operations isofs_sops = { 108 .alloc_inode = isofs_alloc_inode, 109 .destroy_inode = isofs_destroy_inode, 110 .read_inode = isofs_read_inode, 111 .put_super = isofs_put_super, 112 .statfs = isofs_statfs, 113 .remount_fs = isofs_remount, 114 }; 115 116 117 static struct dentry_operations isofs_dentry_ops[] = { 118 { 119 .d_hash = isofs_hash, 120 .d_compare = isofs_dentry_cmp, 121 }, 122 { 123 .d_hash = isofs_hashi, 124 .d_compare = isofs_dentry_cmpi, 125 }, 126 #ifdef CONFIG_JOLIET 127 { 128 .d_hash = isofs_hash_ms, 129 .d_compare = isofs_dentry_cmp_ms, 130 }, 131 { 132 .d_hash = isofs_hashi_ms, 133 .d_compare = isofs_dentry_cmpi_ms, 134 }, 135 #endif 136 }; 137 138 struct iso9660_options{ 139 char map; 140 char rock; 141 char joliet; 142 char cruft; 143 char hide; 144 char showassoc; 145 char nocompress; 146 unsigned char check; 147 unsigned int blocksize; 148 mode_t mode; 149 gid_t gid; 150 uid_t uid; 151 char *iocharset; 152 unsigned char utf8; 153 /* LVE */ 154 s32 session; 155 s32 sbsector; 156 }; 157 158 /* 159 * Compute the hash for the isofs name corresponding to the dentry. 160 */ 161 static int 162 isofs_hash_common(struct dentry *dentry, struct qstr *qstr, int ms) 163 { 164 const char *name; 165 int len; 166 167 len = qstr->len; 168 name = qstr->name; 169 if (ms) { 170 while (len && name[len-1] == '.') 171 len--; 172 } 173 174 qstr->hash = full_name_hash(name, len); 175 176 return 0; 177 } 178 179 /* 180 * Compute the hash for the isofs name corresponding to the dentry. 181 */ 182 static int 183 isofs_hashi_common(struct dentry *dentry, struct qstr *qstr, int ms) 184 { 185 const char *name; 186 int len; 187 char c; 188 unsigned long hash; 189 190 len = qstr->len; 191 name = qstr->name; 192 if (ms) { 193 while (len && name[len-1] == '.') 194 len--; 195 } 196 197 hash = init_name_hash(); 198 while (len--) { 199 c = tolower(*name++); 200 hash = partial_name_hash(c, hash); 201 } 202 qstr->hash = end_name_hash(hash); 203 204 return 0; 205 } 206 207 /* 208 * Case insensitive compare of two isofs names. 209 */ 210 static int isofs_dentry_cmpi_common(struct dentry *dentry, struct qstr *a, 211 struct qstr *b, int ms) 212 { 213 int alen, blen; 214 215 /* A filename cannot end in '.' or we treat it like it has none */ 216 alen = a->len; 217 blen = b->len; 218 if (ms) { 219 while (alen && a->name[alen-1] == '.') 220 alen--; 221 while (blen && b->name[blen-1] == '.') 222 blen--; 223 } 224 if (alen == blen) { 225 if (strnicmp(a->name, b->name, alen) == 0) 226 return 0; 227 } 228 return 1; 229 } 230 231 /* 232 * Case sensitive compare of two isofs names. 233 */ 234 static int isofs_dentry_cmp_common(struct dentry *dentry, struct qstr *a, 235 struct qstr *b, int ms) 236 { 237 int alen, blen; 238 239 /* A filename cannot end in '.' or we treat it like it has none */ 240 alen = a->len; 241 blen = b->len; 242 if (ms) { 243 while (alen && a->name[alen-1] == '.') 244 alen--; 245 while (blen && b->name[blen-1] == '.') 246 blen--; 247 } 248 if (alen == blen) { 249 if (strncmp(a->name, b->name, alen) == 0) 250 return 0; 251 } 252 return 1; 253 } 254 255 static int 256 isofs_hash(struct dentry *dentry, struct qstr *qstr) 257 { 258 return isofs_hash_common(dentry, qstr, 0); 259 } 260 261 static int 262 isofs_hashi(struct dentry *dentry, struct qstr *qstr) 263 { 264 return isofs_hashi_common(dentry, qstr, 0); 265 } 266 267 static int 268 isofs_dentry_cmp(struct dentry *dentry,struct qstr *a,struct qstr *b) 269 { 270 return isofs_dentry_cmp_common(dentry, a, b, 0); 271 } 272 273 static int 274 isofs_dentry_cmpi(struct dentry *dentry,struct qstr *a,struct qstr *b) 275 { 276 return isofs_dentry_cmpi_common(dentry, a, b, 0); 277 } 278 279 #ifdef CONFIG_JOLIET 280 static int 281 isofs_hash_ms(struct dentry *dentry, struct qstr *qstr) 282 { 283 return isofs_hash_common(dentry, qstr, 1); 284 } 285 286 static int 287 isofs_hashi_ms(struct dentry *dentry, struct qstr *qstr) 288 { 289 return isofs_hashi_common(dentry, qstr, 1); 290 } 291 292 static int 293 isofs_dentry_cmp_ms(struct dentry *dentry,struct qstr *a,struct qstr *b) 294 { 295 return isofs_dentry_cmp_common(dentry, a, b, 1); 296 } 297 298 static int 299 isofs_dentry_cmpi_ms(struct dentry *dentry,struct qstr *a,struct qstr *b) 300 { 301 return isofs_dentry_cmpi_common(dentry, a, b, 1); 302 } 303 #endif 304 305 enum { 306 Opt_block, Opt_check_r, Opt_check_s, Opt_cruft, Opt_gid, Opt_ignore, 307 Opt_iocharset, Opt_map_a, Opt_map_n, Opt_map_o, Opt_mode, Opt_nojoliet, 308 Opt_norock, Opt_sb, Opt_session, Opt_uid, Opt_unhide, Opt_utf8, Opt_err, 309 Opt_nocompress, Opt_hide, Opt_showassoc, 310 }; 311 312 static match_table_t tokens = { 313 {Opt_norock, "norock"}, 314 {Opt_nojoliet, "nojoliet"}, 315 {Opt_unhide, "unhide"}, 316 {Opt_hide, "hide"}, 317 {Opt_showassoc, "showassoc"}, 318 {Opt_cruft, "cruft"}, 319 {Opt_utf8, "utf8"}, 320 {Opt_iocharset, "iocharset=%s"}, 321 {Opt_map_a, "map=acorn"}, 322 {Opt_map_a, "map=a"}, 323 {Opt_map_n, "map=normal"}, 324 {Opt_map_n, "map=n"}, 325 {Opt_map_o, "map=off"}, 326 {Opt_map_o, "map=o"}, 327 {Opt_session, "session=%u"}, 328 {Opt_sb, "sbsector=%u"}, 329 {Opt_check_r, "check=relaxed"}, 330 {Opt_check_r, "check=r"}, 331 {Opt_check_s, "check=strict"}, 332 {Opt_check_s, "check=s"}, 333 {Opt_uid, "uid=%u"}, 334 {Opt_gid, "gid=%u"}, 335 {Opt_mode, "mode=%u"}, 336 {Opt_block, "block=%u"}, 337 {Opt_ignore, "conv=binary"}, 338 {Opt_ignore, "conv=b"}, 339 {Opt_ignore, "conv=text"}, 340 {Opt_ignore, "conv=t"}, 341 {Opt_ignore, "conv=mtext"}, 342 {Opt_ignore, "conv=m"}, 343 {Opt_ignore, "conv=auto"}, 344 {Opt_ignore, "conv=a"}, 345 {Opt_nocompress, "nocompress"}, 346 {Opt_err, NULL} 347 }; 348 349 static int parse_options(char *options, struct iso9660_options *popt) 350 { 351 char *p; 352 int option; 353 354 popt->map = 'n'; 355 popt->rock = 'y'; 356 popt->joliet = 'y'; 357 popt->cruft = 'n'; 358 popt->hide = 'n'; 359 popt->showassoc = 'n'; 360 popt->check = 'u'; /* unset */ 361 popt->nocompress = 0; 362 popt->blocksize = 1024; 363 popt->mode = S_IRUGO | S_IXUGO; /* 364 * r-x for all. The disc could 365 * be shared with DOS machines so 366 * virtually anything could be 367 * a valid executable. 368 */ 369 popt->gid = 0; 370 popt->uid = 0; 371 popt->iocharset = NULL; 372 popt->utf8 = 0; 373 popt->session=-1; 374 popt->sbsector=-1; 375 if (!options) 376 return 1; 377 378 while ((p = strsep(&options, ",")) != NULL) { 379 int token; 380 substring_t args[MAX_OPT_ARGS]; 381 unsigned n; 382 383 if (!*p) 384 continue; 385 386 token = match_token(p, tokens, args); 387 switch (token) { 388 case Opt_norock: 389 popt->rock = 'n'; 390 break; 391 case Opt_nojoliet: 392 popt->joliet = 'n'; 393 break; 394 case Opt_hide: 395 popt->hide = 'y'; 396 break; 397 case Opt_unhide: 398 case Opt_showassoc: 399 popt->showassoc = 'y'; 400 break; 401 case Opt_cruft: 402 popt->cruft = 'y'; 403 break; 404 case Opt_utf8: 405 popt->utf8 = 1; 406 break; 407 #ifdef CONFIG_JOLIET 408 case Opt_iocharset: 409 popt->iocharset = match_strdup(&args[0]); 410 break; 411 #endif 412 case Opt_map_a: 413 popt->map = 'a'; 414 break; 415 case Opt_map_o: 416 popt->map = 'o'; 417 break; 418 case Opt_map_n: 419 popt->map = 'n'; 420 break; 421 case Opt_session: 422 if (match_int(&args[0], &option)) 423 return 0; 424 n = option; 425 if (n > 99) 426 return 0; 427 popt->session = n + 1; 428 break; 429 case Opt_sb: 430 if (match_int(&args[0], &option)) 431 return 0; 432 popt->sbsector = option; 433 break; 434 case Opt_check_r: 435 popt->check = 'r'; 436 break; 437 case Opt_check_s: 438 popt->check = 's'; 439 break; 440 case Opt_ignore: 441 break; 442 case Opt_uid: 443 if (match_int(&args[0], &option)) 444 return 0; 445 popt->uid = option; 446 break; 447 case Opt_gid: 448 if (match_int(&args[0], &option)) 449 return 0; 450 popt->gid = option; 451 break; 452 case Opt_mode: 453 if (match_int(&args[0], &option)) 454 return 0; 455 popt->mode = option; 456 break; 457 case Opt_block: 458 if (match_int(&args[0], &option)) 459 return 0; 460 n = option; 461 if (n != 512 && n != 1024 && n != 2048) 462 return 0; 463 popt->blocksize = n; 464 break; 465 case Opt_nocompress: 466 popt->nocompress = 1; 467 break; 468 default: 469 return 0; 470 } 471 } 472 return 1; 473 } 474 475 /* 476 * look if the driver can tell the multi session redirection value 477 * 478 * don't change this if you don't know what you do, please! 479 * Multisession is legal only with XA disks. 480 * A non-XA disk with more than one volume descriptor may do it right, but 481 * usually is written in a nowhere standardized "multi-partition" manner. 482 * Multisession uses absolute addressing (solely the first frame of the whole 483 * track is #0), multi-partition uses relative addressing (each first frame of 484 * each track is #0), and a track is not a session. 485 * 486 * A broken CDwriter software or drive firmware does not set new standards, 487 * at least not if conflicting with the existing ones. 488 * 489 * emoenke@gwdg.de 490 */ 491 #define WE_OBEY_THE_WRITTEN_STANDARDS 1 492 493 static unsigned int isofs_get_last_session(struct super_block *sb, s32 session) 494 { 495 struct cdrom_multisession ms_info; 496 unsigned int vol_desc_start; 497 struct block_device *bdev = sb->s_bdev; 498 int i; 499 500 vol_desc_start=0; 501 ms_info.addr_format=CDROM_LBA; 502 if(session >= 0 && session <= 99) { 503 struct cdrom_tocentry Te; 504 Te.cdte_track=session; 505 Te.cdte_format=CDROM_LBA; 506 i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te); 507 if (!i) { 508 printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n", 509 session, Te.cdte_addr.lba, 510 Te.cdte_ctrl&CDROM_DATA_TRACK); 511 if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4) 512 return Te.cdte_addr.lba; 513 } 514 515 printk(KERN_ERR "ISOFS: Invalid session number or type of track\n"); 516 } 517 i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info); 518 if (session > 0) 519 printk(KERN_ERR "ISOFS: Invalid session number\n"); 520 #if 0 521 printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i); 522 if (i==0) { 523 printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no"); 524 printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba); 525 } 526 #endif 527 if (i==0) 528 #if WE_OBEY_THE_WRITTEN_STANDARDS 529 if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */ 530 #endif 531 vol_desc_start=ms_info.addr.lba; 532 return vol_desc_start; 533 } 534 535 /* 536 * Initialize the superblock and read the root inode. 537 * 538 * Note: a check_disk_change() has been done immediately prior 539 * to this call, so we don't need to check again. 540 */ 541 static int isofs_fill_super(struct super_block *s, void *data, int silent) 542 { 543 struct buffer_head *bh = NULL, *pri_bh = NULL; 544 struct hs_primary_descriptor *h_pri = NULL; 545 struct iso_primary_descriptor *pri = NULL; 546 struct iso_supplementary_descriptor *sec = NULL; 547 struct iso_directory_record *rootp; 548 struct inode *inode; 549 struct iso9660_options opt; 550 struct isofs_sb_info *sbi; 551 unsigned long first_data_zone; 552 int joliet_level = 0; 553 int iso_blknum, block; 554 int orig_zonesize; 555 int table; 556 unsigned int vol_desc_start; 557 558 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 559 if (!sbi) 560 return -ENOMEM; 561 s->s_fs_info = sbi; 562 563 if (!parse_options((char *)data, &opt)) 564 goto out_freesbi; 565 566 /* 567 * First of all, get the hardware blocksize for this device. 568 * If we don't know what it is, or the hardware blocksize is 569 * larger than the blocksize the user specified, then use 570 * that value. 571 */ 572 /* 573 * What if bugger tells us to go beyond page size? 574 */ 575 opt.blocksize = sb_min_blocksize(s, opt.blocksize); 576 577 sbi->s_high_sierra = 0; /* default is iso9660 */ 578 579 vol_desc_start = (opt.sbsector != -1) ? 580 opt.sbsector : isofs_get_last_session(s,opt.session); 581 582 for (iso_blknum = vol_desc_start+16; 583 iso_blknum < vol_desc_start+100; iso_blknum++) { 584 struct hs_volume_descriptor *hdp; 585 struct iso_volume_descriptor *vdp; 586 587 block = iso_blknum << (ISOFS_BLOCK_BITS - s->s_blocksize_bits); 588 if (!(bh = sb_bread(s, block))) 589 goto out_no_read; 590 591 vdp = (struct iso_volume_descriptor *)bh->b_data; 592 hdp = (struct hs_volume_descriptor *)bh->b_data; 593 594 /* 595 * Due to the overlapping physical location of the descriptors, 596 * ISO CDs can match hdp->id==HS_STANDARD_ID as well. To ensure 597 * proper identification in this case, we first check for ISO. 598 */ 599 if (strncmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) == 0) { 600 if (isonum_711(vdp->type) == ISO_VD_END) 601 break; 602 if (isonum_711(vdp->type) == ISO_VD_PRIMARY) { 603 if (pri == NULL) { 604 pri = (struct iso_primary_descriptor *)vdp; 605 /* Save the buffer in case we need it ... */ 606 pri_bh = bh; 607 bh = NULL; 608 } 609 } 610 #ifdef CONFIG_JOLIET 611 else if (isonum_711(vdp->type) == ISO_VD_SUPPLEMENTARY) { 612 sec = (struct iso_supplementary_descriptor *)vdp; 613 if (sec->escape[0] == 0x25 && sec->escape[1] == 0x2f) { 614 if (opt.joliet == 'y') { 615 if (sec->escape[2] == 0x40) 616 joliet_level = 1; 617 else if (sec->escape[2] == 0x43) 618 joliet_level = 2; 619 else if (sec->escape[2] == 0x45) 620 joliet_level = 3; 621 622 printk(KERN_DEBUG "ISO 9660 Extensions: " 623 "Microsoft Joliet Level %d\n", 624 joliet_level); 625 } 626 goto root_found; 627 } else { 628 /* Unknown supplementary volume descriptor */ 629 sec = NULL; 630 } 631 } 632 #endif 633 } else { 634 if (strncmp (hdp->id, HS_STANDARD_ID, sizeof hdp->id) == 0) { 635 if (isonum_711(hdp->type) != ISO_VD_PRIMARY) 636 goto out_freebh; 637 638 sbi->s_high_sierra = 1; 639 opt.rock = 'n'; 640 h_pri = (struct hs_primary_descriptor *)vdp; 641 goto root_found; 642 } 643 } 644 645 /* Just skip any volume descriptors we don't recognize */ 646 647 brelse(bh); 648 bh = NULL; 649 } 650 /* 651 * If we fall through, either no volume descriptor was found, 652 * or else we passed a primary descriptor looking for others. 653 */ 654 if (!pri) 655 goto out_unknown_format; 656 brelse(bh); 657 bh = pri_bh; 658 pri_bh = NULL; 659 660 root_found: 661 662 if (joliet_level && (pri == NULL || opt.rock == 'n')) { 663 /* This is the case of Joliet with the norock mount flag. 664 * A disc with both Joliet and Rock Ridge is handled later 665 */ 666 pri = (struct iso_primary_descriptor *) sec; 667 } 668 669 if(sbi->s_high_sierra){ 670 rootp = (struct iso_directory_record *) h_pri->root_directory_record; 671 sbi->s_nzones = isonum_733(h_pri->volume_space_size); 672 sbi->s_log_zone_size = isonum_723(h_pri->logical_block_size); 673 sbi->s_max_size = isonum_733(h_pri->volume_space_size); 674 } else { 675 if (!pri) 676 goto out_freebh; 677 rootp = (struct iso_directory_record *) pri->root_directory_record; 678 sbi->s_nzones = isonum_733(pri->volume_space_size); 679 sbi->s_log_zone_size = isonum_723(pri->logical_block_size); 680 sbi->s_max_size = isonum_733(pri->volume_space_size); 681 } 682 683 sbi->s_ninodes = 0; /* No way to figure this out easily */ 684 685 orig_zonesize = sbi->s_log_zone_size; 686 /* 687 * If the zone size is smaller than the hardware sector size, 688 * this is a fatal error. This would occur if the disc drive 689 * had sectors that were 2048 bytes, but the filesystem had 690 * blocks that were 512 bytes (which should only very rarely 691 * happen.) 692 */ 693 if (orig_zonesize < opt.blocksize) 694 goto out_bad_size; 695 696 /* RDE: convert log zone size to bit shift */ 697 switch (sbi->s_log_zone_size) { 698 case 512: sbi->s_log_zone_size = 9; break; 699 case 1024: sbi->s_log_zone_size = 10; break; 700 case 2048: sbi->s_log_zone_size = 11; break; 701 702 default: 703 goto out_bad_zone_size; 704 } 705 706 s->s_magic = ISOFS_SUPER_MAGIC; 707 s->s_maxbytes = 0xffffffff; /* We can handle files up to 4 GB */ 708 709 /* 710 * The CDROM is read-only, has no nodes (devices) on it, and since 711 * all of the files appear to be owned by root, we really do not want 712 * to allow suid. (suid or devices will not show up unless we have 713 * Rock Ridge extensions) 714 */ 715 716 s->s_flags |= MS_RDONLY /* | MS_NODEV | MS_NOSUID */; 717 718 /* Set this for reference. Its not currently used except on write 719 which we don't have .. */ 720 721 first_data_zone = isonum_733(rootp->extent) + 722 isonum_711(rootp->ext_attr_length); 723 sbi->s_firstdatazone = first_data_zone; 724 #ifndef BEQUIET 725 printk(KERN_DEBUG "ISOFS: Max size:%ld Log zone size:%ld\n", 726 sbi->s_max_size, 1UL << sbi->s_log_zone_size); 727 printk(KERN_DEBUG "ISOFS: First datazone:%ld\n", sbi->s_firstdatazone); 728 if(sbi->s_high_sierra) 729 printk(KERN_DEBUG "ISOFS: Disc in High Sierra format.\n"); 730 #endif 731 732 /* 733 * If the Joliet level is set, we _may_ decide to use the 734 * secondary descriptor, but can't be sure until after we 735 * read the root inode. But before reading the root inode 736 * we may need to change the device blocksize, and would 737 * rather release the old buffer first. So, we cache the 738 * first_data_zone value from the secondary descriptor. 739 */ 740 if (joliet_level) { 741 pri = (struct iso_primary_descriptor *) sec; 742 rootp = (struct iso_directory_record *) 743 pri->root_directory_record; 744 first_data_zone = isonum_733(rootp->extent) + 745 isonum_711(rootp->ext_attr_length); 746 } 747 748 /* 749 * We're all done using the volume descriptor, and may need 750 * to change the device blocksize, so release the buffer now. 751 */ 752 brelse(pri_bh); 753 brelse(bh); 754 755 /* 756 * Force the blocksize to 512 for 512 byte sectors. The file 757 * read primitives really get it wrong in a bad way if we don't 758 * do this. 759 * 760 * Note - we should never be setting the blocksize to something 761 * less than the hardware sector size for the device. If we 762 * do, we would end up having to read larger buffers and split 763 * out portions to satisfy requests. 764 * 765 * Note2- the idea here is that we want to deal with the optimal 766 * zonesize in the filesystem. If we have it set to something less, 767 * then we have horrible problems with trying to piece together 768 * bits of adjacent blocks in order to properly read directory 769 * entries. By forcing the blocksize in this way, we ensure 770 * that we will never be required to do this. 771 */ 772 sb_set_blocksize(s, orig_zonesize); 773 774 sbi->s_nls_iocharset = NULL; 775 776 #ifdef CONFIG_JOLIET 777 if (joliet_level && opt.utf8 == 0) { 778 char *p = opt.iocharset ? opt.iocharset : CONFIG_NLS_DEFAULT; 779 sbi->s_nls_iocharset = load_nls(p); 780 if (! sbi->s_nls_iocharset) { 781 /* Fail only if explicit charset specified */ 782 if (opt.iocharset) 783 goto out_freesbi; 784 sbi->s_nls_iocharset = load_nls_default(); 785 } 786 } 787 #endif 788 s->s_op = &isofs_sops; 789 s->s_export_op = &isofs_export_ops; 790 sbi->s_mapping = opt.map; 791 sbi->s_rock = (opt.rock == 'y' ? 2 : 0); 792 sbi->s_rock_offset = -1; /* initial offset, will guess until SP is found*/ 793 sbi->s_cruft = opt.cruft; 794 sbi->s_hide = opt.hide; 795 sbi->s_showassoc = opt.showassoc; 796 sbi->s_uid = opt.uid; 797 sbi->s_gid = opt.gid; 798 sbi->s_utf8 = opt.utf8; 799 sbi->s_nocompress = opt.nocompress; 800 /* 801 * It would be incredibly stupid to allow people to mark every file 802 * on the disk as suid, so we merely allow them to set the default 803 * permissions. 804 */ 805 sbi->s_mode = opt.mode & 0777; 806 807 /* 808 * Read the root inode, which _may_ result in changing 809 * the s_rock flag. Once we have the final s_rock value, 810 * we then decide whether to use the Joliet descriptor. 811 */ 812 inode = isofs_iget(s, sbi->s_firstdatazone, 0); 813 814 /* 815 * If this disk has both Rock Ridge and Joliet on it, then we 816 * want to use Rock Ridge by default. This can be overridden 817 * by using the norock mount option. There is still one other 818 * possibility that is not taken into account: a Rock Ridge 819 * CD with Unicode names. Until someone sees such a beast, it 820 * will not be supported. 821 */ 822 if (sbi->s_rock == 1) { 823 joliet_level = 0; 824 } else if (joliet_level) { 825 sbi->s_rock = 0; 826 if (sbi->s_firstdatazone != first_data_zone) { 827 sbi->s_firstdatazone = first_data_zone; 828 printk(KERN_DEBUG 829 "ISOFS: changing to secondary root\n"); 830 iput(inode); 831 inode = isofs_iget(s, sbi->s_firstdatazone, 0); 832 } 833 } 834 835 if (opt.check == 'u') { 836 /* Only Joliet is case insensitive by default */ 837 if (joliet_level) 838 opt.check = 'r'; 839 else 840 opt.check = 's'; 841 } 842 sbi->s_joliet_level = joliet_level; 843 844 /* check the root inode */ 845 if (!inode) 846 goto out_no_root; 847 if (!inode->i_op) 848 goto out_bad_root; 849 /* get the root dentry */ 850 s->s_root = d_alloc_root(inode); 851 if (!(s->s_root)) 852 goto out_no_root; 853 854 table = 0; 855 if (joliet_level) 856 table += 2; 857 if (opt.check == 'r') 858 table++; 859 s->s_root->d_op = &isofs_dentry_ops[table]; 860 861 kfree(opt.iocharset); 862 863 return 0; 864 865 /* 866 * Display error messages and free resources. 867 */ 868 out_bad_root: 869 printk(KERN_WARNING "%s: root inode not initialized\n", __func__); 870 goto out_iput; 871 out_no_root: 872 printk(KERN_WARNING "%s: get root inode failed\n", __func__); 873 out_iput: 874 iput(inode); 875 #ifdef CONFIG_JOLIET 876 if (sbi->s_nls_iocharset) 877 unload_nls(sbi->s_nls_iocharset); 878 #endif 879 goto out_freesbi; 880 out_no_read: 881 printk(KERN_WARNING "%s: bread failed, dev=%s, iso_blknum=%d, block=%d\n", 882 __func__, s->s_id, iso_blknum, block); 883 goto out_freesbi; 884 out_bad_zone_size: 885 printk(KERN_WARNING "ISOFS: Bad logical zone size %ld\n", 886 sbi->s_log_zone_size); 887 goto out_freebh; 888 out_bad_size: 889 printk(KERN_WARNING "ISOFS: Logical zone size(%d) < hardware blocksize(%u)\n", 890 orig_zonesize, opt.blocksize); 891 goto out_freebh; 892 out_unknown_format: 893 if (!silent) 894 printk(KERN_WARNING "ISOFS: Unable to identify CD-ROM format.\n"); 895 896 out_freebh: 897 brelse(bh); 898 out_freesbi: 899 kfree(opt.iocharset); 900 kfree(sbi); 901 s->s_fs_info = NULL; 902 return -EINVAL; 903 } 904 905 static int isofs_statfs (struct dentry *dentry, struct kstatfs *buf) 906 { 907 struct super_block *sb = dentry->d_sb; 908 909 buf->f_type = ISOFS_SUPER_MAGIC; 910 buf->f_bsize = sb->s_blocksize; 911 buf->f_blocks = (ISOFS_SB(sb)->s_nzones 912 << (ISOFS_SB(sb)->s_log_zone_size - sb->s_blocksize_bits)); 913 buf->f_bfree = 0; 914 buf->f_bavail = 0; 915 buf->f_files = ISOFS_SB(sb)->s_ninodes; 916 buf->f_ffree = 0; 917 buf->f_namelen = NAME_MAX; 918 return 0; 919 } 920 921 /* 922 * Get a set of blocks; filling in buffer_heads if already allocated 923 * or getblk() if they are not. Returns the number of blocks inserted 924 * (0 == error.) 925 */ 926 int isofs_get_blocks(struct inode *inode, sector_t iblock_s, 927 struct buffer_head **bh, unsigned long nblocks) 928 { 929 unsigned long b_off; 930 unsigned offset, sect_size; 931 unsigned int firstext; 932 unsigned long nextblk, nextoff; 933 long iblock = (long)iblock_s; 934 int section, rv; 935 struct iso_inode_info *ei = ISOFS_I(inode); 936 937 lock_kernel(); 938 939 rv = 0; 940 if (iblock < 0 || iblock != iblock_s) { 941 printk(KERN_DEBUG "%s: block number too large\n", __func__); 942 goto abort; 943 } 944 945 b_off = iblock; 946 947 offset = 0; 948 firstext = ei->i_first_extent; 949 sect_size = ei->i_section_size >> ISOFS_BUFFER_BITS(inode); 950 nextblk = ei->i_next_section_block; 951 nextoff = ei->i_next_section_offset; 952 section = 0; 953 954 while (nblocks) { 955 /* If we are *way* beyond the end of the file, print a message. 956 * Access beyond the end of the file up to the next page boundary 957 * is normal, however because of the way the page cache works. 958 * In this case, we just return 0 so that we can properly fill 959 * the page with useless information without generating any 960 * I/O errors. 961 */ 962 if (b_off > ((inode->i_size + PAGE_CACHE_SIZE - 1) >> ISOFS_BUFFER_BITS(inode))) { 963 printk(KERN_DEBUG "%s: block >= EOF (%ld, %ld)\n", 964 __func__, iblock, (unsigned long) inode->i_size); 965 goto abort; 966 } 967 968 /* On the last section, nextblk == 0, section size is likely to 969 * exceed sect_size by a partial block, and access beyond the 970 * end of the file will reach beyond the section size, too. 971 */ 972 while (nextblk && (b_off >= (offset + sect_size))) { 973 struct inode *ninode; 974 975 offset += sect_size; 976 ninode = isofs_iget(inode->i_sb, nextblk, nextoff); 977 if (!ninode) 978 goto abort; 979 firstext = ISOFS_I(ninode)->i_first_extent; 980 sect_size = ISOFS_I(ninode)->i_section_size >> ISOFS_BUFFER_BITS(ninode); 981 nextblk = ISOFS_I(ninode)->i_next_section_block; 982 nextoff = ISOFS_I(ninode)->i_next_section_offset; 983 iput(ninode); 984 985 if (++section > 100) { 986 printk(KERN_DEBUG "%s: More than 100 file sections ?!?" 987 " aborting...\n", __func__); 988 printk(KERN_DEBUG "%s: block=%ld firstext=%u sect_size=%u " 989 "nextblk=%lu nextoff=%lu\n", __func__, 990 iblock, firstext, (unsigned) sect_size, 991 nextblk, nextoff); 992 goto abort; 993 } 994 } 995 996 if (*bh) { 997 map_bh(*bh, inode->i_sb, firstext + b_off - offset); 998 } else { 999 *bh = sb_getblk(inode->i_sb, firstext+b_off-offset); 1000 if (!*bh) 1001 goto abort; 1002 } 1003 bh++; /* Next buffer head */ 1004 b_off++; /* Next buffer offset */ 1005 nblocks--; 1006 rv++; 1007 } 1008 1009 abort: 1010 unlock_kernel(); 1011 return rv; 1012 } 1013 1014 /* 1015 * Used by the standard interfaces. 1016 */ 1017 static int isofs_get_block(struct inode *inode, sector_t iblock, 1018 struct buffer_head *bh_result, int create) 1019 { 1020 if (create) { 1021 printk(KERN_DEBUG "%s: Kernel tries to allocate a block\n", __func__); 1022 return -EROFS; 1023 } 1024 1025 return isofs_get_blocks(inode, iblock, &bh_result, 1) ? 0 : -EIO; 1026 } 1027 1028 static int isofs_bmap(struct inode *inode, sector_t block) 1029 { 1030 struct buffer_head dummy; 1031 int error; 1032 1033 dummy.b_state = 0; 1034 dummy.b_blocknr = -1000; 1035 error = isofs_get_block(inode, block, &dummy, 0); 1036 if (!error) 1037 return dummy.b_blocknr; 1038 return 0; 1039 } 1040 1041 struct buffer_head *isofs_bread(struct inode *inode, sector_t block) 1042 { 1043 sector_t blknr = isofs_bmap(inode, block); 1044 if (!blknr) 1045 return NULL; 1046 return sb_bread(inode->i_sb, blknr); 1047 } 1048 1049 static int isofs_readpage(struct file *file, struct page *page) 1050 { 1051 return block_read_full_page(page,isofs_get_block); 1052 } 1053 1054 static sector_t _isofs_bmap(struct address_space *mapping, sector_t block) 1055 { 1056 return generic_block_bmap(mapping,block,isofs_get_block); 1057 } 1058 1059 static const struct address_space_operations isofs_aops = { 1060 .readpage = isofs_readpage, 1061 .sync_page = block_sync_page, 1062 .bmap = _isofs_bmap 1063 }; 1064 1065 static inline void test_and_set_uid(uid_t *p, uid_t value) 1066 { 1067 if (value) 1068 *p = value; 1069 } 1070 1071 static inline void test_and_set_gid(gid_t *p, gid_t value) 1072 { 1073 if (value) 1074 *p = value; 1075 } 1076 1077 static int isofs_read_level3_size(struct inode *inode) 1078 { 1079 unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); 1080 int high_sierra = ISOFS_SB(inode->i_sb)->s_high_sierra; 1081 struct buffer_head *bh = NULL; 1082 unsigned long block, offset, block_saved, offset_saved; 1083 int i = 0; 1084 int more_entries = 0; 1085 struct iso_directory_record *tmpde = NULL; 1086 struct iso_inode_info *ei = ISOFS_I(inode); 1087 1088 inode->i_size = 0; 1089 1090 /* The first 16 blocks are reserved as the System Area. Thus, 1091 * no inodes can appear in block 0. We use this to flag that 1092 * this is the last section. */ 1093 ei->i_next_section_block = 0; 1094 ei->i_next_section_offset = 0; 1095 1096 block = ei->i_iget5_block; 1097 offset = ei->i_iget5_offset; 1098 1099 do { 1100 struct iso_directory_record *de; 1101 unsigned int de_len; 1102 1103 if (!bh) { 1104 bh = sb_bread(inode->i_sb, block); 1105 if (!bh) 1106 goto out_noread; 1107 } 1108 de = (struct iso_directory_record *) (bh->b_data + offset); 1109 de_len = *(unsigned char *) de; 1110 1111 if (de_len == 0) { 1112 brelse(bh); 1113 bh = NULL; 1114 ++block; 1115 offset = 0; 1116 continue; 1117 } 1118 1119 block_saved = block; 1120 offset_saved = offset; 1121 offset += de_len; 1122 1123 /* Make sure we have a full directory entry */ 1124 if (offset >= bufsize) { 1125 int slop = bufsize - offset + de_len; 1126 if (!tmpde) { 1127 tmpde = kmalloc(256, GFP_KERNEL); 1128 if (!tmpde) 1129 goto out_nomem; 1130 } 1131 memcpy(tmpde, de, slop); 1132 offset &= bufsize - 1; 1133 block++; 1134 brelse(bh); 1135 bh = NULL; 1136 if (offset) { 1137 bh = sb_bread(inode->i_sb, block); 1138 if (!bh) 1139 goto out_noread; 1140 memcpy((void *)tmpde+slop, bh->b_data, offset); 1141 } 1142 de = tmpde; 1143 } 1144 1145 inode->i_size += isonum_733(de->size); 1146 if (i == 1) { 1147 ei->i_next_section_block = block_saved; 1148 ei->i_next_section_offset = offset_saved; 1149 } 1150 1151 more_entries = de->flags[-high_sierra] & 0x80; 1152 1153 i++; 1154 if (i > 100) 1155 goto out_toomany; 1156 } while (more_entries); 1157 out: 1158 kfree(tmpde); 1159 if (bh) 1160 brelse(bh); 1161 return 0; 1162 1163 out_nomem: 1164 if (bh) 1165 brelse(bh); 1166 return -ENOMEM; 1167 1168 out_noread: 1169 printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block); 1170 kfree(tmpde); 1171 return -EIO; 1172 1173 out_toomany: 1174 printk(KERN_INFO "%s: More than 100 file sections ?!?, aborting...\n" 1175 "isofs_read_level3_size: inode=%lu\n", 1176 __func__, inode->i_ino); 1177 goto out; 1178 } 1179 1180 static void isofs_read_inode(struct inode *inode) 1181 { 1182 struct super_block *sb = inode->i_sb; 1183 struct isofs_sb_info *sbi = ISOFS_SB(sb); 1184 unsigned long bufsize = ISOFS_BUFFER_SIZE(inode); 1185 unsigned long block; 1186 int high_sierra = sbi->s_high_sierra; 1187 struct buffer_head *bh = NULL; 1188 struct iso_directory_record *de; 1189 struct iso_directory_record *tmpde = NULL; 1190 unsigned int de_len; 1191 unsigned long offset; 1192 struct iso_inode_info *ei = ISOFS_I(inode); 1193 1194 block = ei->i_iget5_block; 1195 bh = sb_bread(inode->i_sb, block); 1196 if (!bh) 1197 goto out_badread; 1198 1199 offset = ei->i_iget5_offset; 1200 1201 de = (struct iso_directory_record *) (bh->b_data + offset); 1202 de_len = *(unsigned char *) de; 1203 1204 if (offset + de_len > bufsize) { 1205 int frag1 = bufsize - offset; 1206 1207 tmpde = kmalloc(de_len, GFP_KERNEL); 1208 if (tmpde == NULL) { 1209 printk(KERN_INFO "%s: out of memory\n", __func__); 1210 goto fail; 1211 } 1212 memcpy(tmpde, bh->b_data + offset, frag1); 1213 brelse(bh); 1214 bh = sb_bread(inode->i_sb, ++block); 1215 if (!bh) 1216 goto out_badread; 1217 memcpy((char *)tmpde+frag1, bh->b_data, de_len - frag1); 1218 de = tmpde; 1219 } 1220 1221 inode->i_ino = isofs_get_ino(ei->i_iget5_block, 1222 ei->i_iget5_offset, 1223 ISOFS_BUFFER_BITS(inode)); 1224 1225 /* Assume it is a normal-format file unless told otherwise */ 1226 ei->i_file_format = isofs_file_normal; 1227 1228 if (de->flags[-high_sierra] & 2) { 1229 inode->i_mode = S_IRUGO | S_IXUGO | S_IFDIR; 1230 inode->i_nlink = 1; /* 1231 * Set to 1. We know there are 2, but 1232 * the find utility tries to optimize 1233 * if it is 2, and it screws up. It is 1234 * easier to give 1 which tells find to 1235 * do it the hard way. 1236 */ 1237 } else { 1238 /* Everybody gets to read the file. */ 1239 inode->i_mode = sbi->s_mode; 1240 inode->i_nlink = 1; 1241 inode->i_mode |= S_IFREG; 1242 } 1243 inode->i_uid = sbi->s_uid; 1244 inode->i_gid = sbi->s_gid; 1245 inode->i_blocks = 0; 1246 1247 ei->i_format_parm[0] = 0; 1248 ei->i_format_parm[1] = 0; 1249 ei->i_format_parm[2] = 0; 1250 1251 ei->i_section_size = isonum_733(de->size); 1252 if (de->flags[-high_sierra] & 0x80) { 1253 if(isofs_read_level3_size(inode)) 1254 goto fail; 1255 } else { 1256 ei->i_next_section_block = 0; 1257 ei->i_next_section_offset = 0; 1258 inode->i_size = isonum_733(de->size); 1259 } 1260 1261 /* 1262 * Some dipshit decided to store some other bit of information 1263 * in the high byte of the file length. Truncate size in case 1264 * this CDROM was mounted with the cruft option. 1265 */ 1266 1267 if (sbi->s_cruft == 'y') 1268 inode->i_size &= 0x00ffffff; 1269 1270 if (de->interleave[0]) { 1271 printk(KERN_DEBUG "ISOFS: Interleaved files not (yet) supported.\n"); 1272 inode->i_size = 0; 1273 } 1274 1275 /* I have no idea what file_unit_size is used for, so 1276 we will flag it for now */ 1277 if (de->file_unit_size[0] != 0) { 1278 printk(KERN_DEBUG "ISOFS: File unit size != 0 for ISO file (%ld).\n", 1279 inode->i_ino); 1280 } 1281 1282 /* I have no idea what other flag bits are used for, so 1283 we will flag it for now */ 1284 #ifdef DEBUG 1285 if((de->flags[-high_sierra] & ~2)!= 0){ 1286 printk(KERN_DEBUG "ISOFS: Unusual flag settings for ISO file " 1287 "(%ld %x).\n", 1288 inode->i_ino, de->flags[-high_sierra]); 1289 } 1290 #endif 1291 1292 inode->i_mtime.tv_sec = 1293 inode->i_atime.tv_sec = 1294 inode->i_ctime.tv_sec = iso_date(de->date, high_sierra); 1295 inode->i_mtime.tv_nsec = 1296 inode->i_atime.tv_nsec = 1297 inode->i_ctime.tv_nsec = 0; 1298 1299 ei->i_first_extent = (isonum_733(de->extent) + 1300 isonum_711(de->ext_attr_length)); 1301 1302 /* Set the number of blocks for stat() - should be done before RR */ 1303 inode->i_blocks = (inode->i_size + 511) >> 9; 1304 1305 /* 1306 * Now test for possible Rock Ridge extensions which will override 1307 * some of these numbers in the inode structure. 1308 */ 1309 1310 if (!high_sierra) { 1311 parse_rock_ridge_inode(de, inode); 1312 /* if we want uid/gid set, override the rock ridge setting */ 1313 test_and_set_uid(&inode->i_uid, sbi->s_uid); 1314 test_and_set_gid(&inode->i_gid, sbi->s_gid); 1315 } 1316 1317 /* Install the inode operations vector */ 1318 if (S_ISREG(inode->i_mode)) { 1319 inode->i_fop = &generic_ro_fops; 1320 switch (ei->i_file_format) { 1321 #ifdef CONFIG_ZISOFS 1322 case isofs_file_compressed: 1323 inode->i_data.a_ops = &zisofs_aops; 1324 break; 1325 #endif 1326 default: 1327 inode->i_data.a_ops = &isofs_aops; 1328 break; 1329 } 1330 } else if (S_ISDIR(inode->i_mode)) { 1331 inode->i_op = &isofs_dir_inode_operations; 1332 inode->i_fop = &isofs_dir_operations; 1333 } else if (S_ISLNK(inode->i_mode)) { 1334 inode->i_op = &page_symlink_inode_operations; 1335 inode->i_data.a_ops = &isofs_symlink_aops; 1336 } else 1337 /* XXX - parse_rock_ridge_inode() had already set i_rdev. */ 1338 init_special_inode(inode, inode->i_mode, inode->i_rdev); 1339 1340 out: 1341 kfree(tmpde); 1342 if (bh) 1343 brelse(bh); 1344 return; 1345 1346 out_badread: 1347 printk(KERN_WARNING "ISOFS: unable to read i-node block\n"); 1348 fail: 1349 make_bad_inode(inode); 1350 goto out; 1351 } 1352 1353 struct isofs_iget5_callback_data { 1354 unsigned long block; 1355 unsigned long offset; 1356 }; 1357 1358 static int isofs_iget5_test(struct inode *ino, void *data) 1359 { 1360 struct iso_inode_info *i = ISOFS_I(ino); 1361 struct isofs_iget5_callback_data *d = 1362 (struct isofs_iget5_callback_data*)data; 1363 return (i->i_iget5_block == d->block) 1364 && (i->i_iget5_offset == d->offset); 1365 } 1366 1367 static int isofs_iget5_set(struct inode *ino, void *data) 1368 { 1369 struct iso_inode_info *i = ISOFS_I(ino); 1370 struct isofs_iget5_callback_data *d = 1371 (struct isofs_iget5_callback_data*)data; 1372 i->i_iget5_block = d->block; 1373 i->i_iget5_offset = d->offset; 1374 return 0; 1375 } 1376 1377 /* Store, in the inode's containing structure, the block and block 1378 * offset that point to the underlying meta-data for the inode. The 1379 * code below is otherwise similar to the iget() code in 1380 * include/linux/fs.h */ 1381 struct inode *isofs_iget(struct super_block *sb, 1382 unsigned long block, 1383 unsigned long offset) 1384 { 1385 unsigned long hashval; 1386 struct inode *inode; 1387 struct isofs_iget5_callback_data data; 1388 1389 if (offset >= 1ul << sb->s_blocksize_bits) 1390 return NULL; 1391 1392 data.block = block; 1393 data.offset = offset; 1394 1395 hashval = (block << sb->s_blocksize_bits) | offset; 1396 1397 inode = iget5_locked(sb, hashval, &isofs_iget5_test, 1398 &isofs_iget5_set, &data); 1399 1400 if (inode && (inode->i_state & I_NEW)) { 1401 sb->s_op->read_inode(inode); 1402 unlock_new_inode(inode); 1403 } 1404 1405 return inode; 1406 } 1407 1408 static int isofs_get_sb(struct file_system_type *fs_type, 1409 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 1410 { 1411 return get_sb_bdev(fs_type, flags, dev_name, data, isofs_fill_super, 1412 mnt); 1413 } 1414 1415 static struct file_system_type iso9660_fs_type = { 1416 .owner = THIS_MODULE, 1417 .name = "iso9660", 1418 .get_sb = isofs_get_sb, 1419 .kill_sb = kill_block_super, 1420 .fs_flags = FS_REQUIRES_DEV, 1421 }; 1422 1423 static int __init init_iso9660_fs(void) 1424 { 1425 int err = init_inodecache(); 1426 if (err) 1427 goto out; 1428 #ifdef CONFIG_ZISOFS 1429 err = zisofs_init(); 1430 if (err) 1431 goto out1; 1432 #endif 1433 err = register_filesystem(&iso9660_fs_type); 1434 if (err) 1435 goto out2; 1436 return 0; 1437 out2: 1438 #ifdef CONFIG_ZISOFS 1439 zisofs_cleanup(); 1440 out1: 1441 #endif 1442 destroy_inodecache(); 1443 out: 1444 return err; 1445 } 1446 1447 static void __exit exit_iso9660_fs(void) 1448 { 1449 unregister_filesystem(&iso9660_fs_type); 1450 #ifdef CONFIG_ZISOFS 1451 zisofs_cleanup(); 1452 #endif 1453 destroy_inodecache(); 1454 } 1455 1456 module_init(init_iso9660_fs) 1457 module_exit(exit_iso9660_fs) 1458 MODULE_LICENSE("GPL"); 1459 /* Actual filesystem name is iso9660, as requested in filesystems.c */ 1460 MODULE_ALIAS("iso9660"); 1461