[PATCH] udf: fix uid/gid options and add uid/gid=ignore and forget options
[linux-3.10.git] / fs / udf / super.c
1 /*
2  * super.c
3  *
4  * PURPOSE
5  *  Super block routines for the OSTA-UDF(tm) filesystem.
6  *
7  * DESCRIPTION
8  *  OSTA-UDF(tm) = Optical Storage Technology Association
9  *  Universal Disk Format.
10  *
11  *  This code is based on version 2.00 of the UDF specification,
12  *  and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
13  *    http://www.osta.org/
14  *    http://www.ecma.ch/
15  *    http://www.iso.org/
16  *
17  * COPYRIGHT
18  *  This file is distributed under the terms of the GNU General Public
19  *  License (GPL). Copies of the GPL can be obtained from:
20  *    ftp://prep.ai.mit.edu/pub/gnu/GPL
21  *  Each contributing author retains all rights to their own work.
22  *
23  *  (C) 1998 Dave Boynton
24  *  (C) 1998-2004 Ben Fennema
25  *  (C) 2000 Stelias Computing Inc
26  *
27  * HISTORY
28  *
29  *  09/24/98 dgb  changed to allow compiling outside of kernel, and
30  *                added some debugging.
31  *  10/01/98 dgb  updated to allow (some) possibility of compiling w/2.0.34
32  *  10/16/98      attempting some multi-session support
33  *  10/17/98      added freespace count for "df"
34  *  11/11/98 gr   added novrs option
35  *  11/26/98 dgb  added fileset,anchor mount options
36  *  12/06/98 blf  really hosed things royally. vat/sparing support. sequenced vol descs
37  *                rewrote option handling based on isofs
38  *  12/20/98      find the free space bitmap (if it exists)
39  */
40
41 #include "udfdecl.h"    
42
43 #include <linux/config.h>
44 #include <linux/blkdev.h>
45 #include <linux/slab.h>
46 #include <linux/kernel.h>
47 #include <linux/module.h>
48 #include <linux/parser.h>
49 #include <linux/stat.h>
50 #include <linux/cdrom.h>
51 #include <linux/nls.h>
52 #include <linux/smp_lock.h>
53 #include <linux/buffer_head.h>
54 #include <linux/vfs.h>
55 #include <linux/vmalloc.h>
56 #include <asm/byteorder.h>
57
58 #include <linux/udf_fs.h>
59 #include "udf_sb.h"
60 #include "udf_i.h"
61
62 #include <linux/init.h>
63 #include <asm/uaccess.h>
64
65 #define VDS_POS_PRIMARY_VOL_DESC        0
66 #define VDS_POS_UNALLOC_SPACE_DESC      1
67 #define VDS_POS_LOGICAL_VOL_DESC        2
68 #define VDS_POS_PARTITION_DESC          3
69 #define VDS_POS_IMP_USE_VOL_DESC        4
70 #define VDS_POS_VOL_DESC_PTR            5
71 #define VDS_POS_TERMINATING_DESC        6
72 #define VDS_POS_LENGTH                  7
73
74 static char error_buf[1024];
75
76 /* These are the "meat" - everything else is stuffing */
77 static int udf_fill_super(struct super_block *, void *, int);
78 static void udf_put_super(struct super_block *);
79 static void udf_write_super(struct super_block *);
80 static int udf_remount_fs(struct super_block *, int *, char *);
81 static int udf_check_valid(struct super_block *, int, int);
82 static int udf_vrs(struct super_block *sb, int silent);
83 static int udf_load_partition(struct super_block *, kernel_lb_addr *);
84 static int udf_load_logicalvol(struct super_block *, struct buffer_head *, kernel_lb_addr *);
85 static void udf_load_logicalvolint(struct super_block *, kernel_extent_ad);
86 static void udf_find_anchor(struct super_block *);
87 static int udf_find_fileset(struct super_block *, kernel_lb_addr *, kernel_lb_addr *);
88 static void udf_load_pvoldesc(struct super_block *, struct buffer_head *);
89 static void udf_load_fileset(struct super_block *, struct buffer_head *, kernel_lb_addr *);
90 static void udf_load_partdesc(struct super_block *, struct buffer_head *);
91 static void udf_open_lvid(struct super_block *);
92 static void udf_close_lvid(struct super_block *);
93 static unsigned int udf_count_free(struct super_block *);
94 static int udf_statfs(struct super_block *, struct kstatfs *);
95
96 /* UDF filesystem type */
97 static struct super_block *udf_get_sb(struct file_system_type *fs_type,
98         int flags, const char *dev_name, void *data)
99 {
100         return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super);
101 }
102
103 static struct file_system_type udf_fstype = {
104         .owner          = THIS_MODULE,
105         .name           = "udf",
106         .get_sb         = udf_get_sb,
107         .kill_sb        = kill_block_super,
108         .fs_flags       = FS_REQUIRES_DEV,
109 };
110
111 static kmem_cache_t * udf_inode_cachep;
112
113 static struct inode *udf_alloc_inode(struct super_block *sb)
114 {
115         struct udf_inode_info *ei;
116         ei = (struct udf_inode_info *)kmem_cache_alloc(udf_inode_cachep, SLAB_KERNEL);
117         if (!ei)
118                 return NULL;
119         return &ei->vfs_inode;
120 }
121
122 static void udf_destroy_inode(struct inode *inode)
123 {
124         kmem_cache_free(udf_inode_cachep, UDF_I(inode));
125 }
126
127 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
128 {
129         struct udf_inode_info *ei = (struct udf_inode_info *) foo;
130
131         if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
132             SLAB_CTOR_CONSTRUCTOR)
133         {
134                 ei->i_ext.i_data = NULL;
135                 inode_init_once(&ei->vfs_inode);
136         }
137 }
138
139 static int init_inodecache(void)
140 {
141         udf_inode_cachep = kmem_cache_create("udf_inode_cache",
142                                              sizeof(struct udf_inode_info),
143                                              0, SLAB_RECLAIM_ACCOUNT,
144                                              init_once, NULL);
145         if (udf_inode_cachep == NULL)
146                 return -ENOMEM;
147         return 0;
148 }
149
150 static void destroy_inodecache(void)
151 {
152         if (kmem_cache_destroy(udf_inode_cachep))
153                 printk(KERN_INFO "udf_inode_cache: not all structures were freed\n");
154 }
155
156 /* Superblock operations */
157 static struct super_operations udf_sb_ops = {
158         .alloc_inode            = udf_alloc_inode,
159         .destroy_inode          = udf_destroy_inode,
160         .write_inode            = udf_write_inode,
161         .delete_inode           = udf_delete_inode,
162         .clear_inode            = udf_clear_inode,
163         .put_super              = udf_put_super,
164         .write_super            = udf_write_super,
165         .statfs                 = udf_statfs,
166         .remount_fs             = udf_remount_fs,
167 };
168
169 struct udf_options
170 {
171         unsigned char novrs;
172         unsigned int blocksize;
173         unsigned int session;
174         unsigned int lastblock;
175         unsigned int anchor;
176         unsigned int volume;
177         unsigned short partition;
178         unsigned int fileset;
179         unsigned int rootdir;
180         unsigned int flags;
181         mode_t umask;
182         gid_t gid;
183         uid_t uid;
184         struct nls_table *nls_map;
185 };
186
187 static int __init init_udf_fs(void)
188 {
189         int err;
190         err = init_inodecache();
191         if (err)
192                 goto out1;
193         err = register_filesystem(&udf_fstype);
194         if (err)
195                 goto out;
196         return 0;
197 out:
198         destroy_inodecache();
199 out1:
200         return err;
201 }
202
203 static void __exit exit_udf_fs(void)
204 {
205         unregister_filesystem(&udf_fstype);
206         destroy_inodecache();
207 }
208
209 module_init(init_udf_fs)
210 module_exit(exit_udf_fs)
211
212 /*
213  * udf_parse_options
214  *
215  * PURPOSE
216  *      Parse mount options.
217  *
218  * DESCRIPTION
219  *      The following mount options are supported:
220  *
221  *      gid=            Set the default group.
222  *      umask=          Set the default umask.
223  *      uid=            Set the default user.
224  *      bs=             Set the block size.
225  *      unhide          Show otherwise hidden files.
226  *      undelete        Show deleted files in lists.
227  *      adinicb         Embed data in the inode (default)
228  *      noadinicb       Don't embed data in the inode
229  *      shortad         Use short ad's
230  *      longad          Use long ad's (default)
231  *      nostrict        Unset strict conformance
232  *      iocharset=      Set the NLS character set
233  *
234  *      The remaining are for debugging and disaster recovery:
235  *
236  *      novrs           Skip volume sequence recognition 
237  *
238  *      The following expect a offset from 0.
239  *
240  *      session=        Set the CDROM session (default= last session)
241  *      anchor=         Override standard anchor location. (default= 256)
242  *      volume=         Override the VolumeDesc location. (unused)
243  *      partition=      Override the PartitionDesc location. (unused)
244  *      lastblock=      Set the last block of the filesystem/
245  *
246  *      The following expect a offset from the partition root.
247  *
248  *      fileset=        Override the fileset block location. (unused)
249  *      rootdir=        Override the root directory location. (unused)
250  *              WARNING: overriding the rootdir to a non-directory may
251  *              yield highly unpredictable results.
252  *
253  * PRE-CONDITIONS
254  *      options         Pointer to mount options string.
255  *      uopts           Pointer to mount options variable.
256  *
257  * POST-CONDITIONS
258  *      <return>        1       Mount options parsed okay.
259  *      <return>        0       Error parsing mount options.
260  *
261  * HISTORY
262  *      July 1, 1997 - Andrew E. Mileski
263  *      Written, tested, and released.
264  */
265
266 enum {
267         Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
268         Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
269         Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
270         Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
271         Opt_rootdir, Opt_utf8, Opt_iocharset,
272         Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore
273 };
274
275 static match_table_t tokens = {
276         {Opt_novrs, "novrs"},
277         {Opt_nostrict, "nostrict"},
278         {Opt_bs, "bs=%u"},
279         {Opt_unhide, "unhide"},
280         {Opt_undelete, "undelete"},
281         {Opt_noadinicb, "noadinicb"},
282         {Opt_adinicb, "adinicb"},
283         {Opt_shortad, "shortad"},
284         {Opt_longad, "longad"},
285         {Opt_uforget, "uid=forget"},
286         {Opt_uignore, "uid=ignore"},
287         {Opt_gforget, "gid=forget"},
288         {Opt_gignore, "gid=ignore"},
289         {Opt_gid, "gid=%u"},
290         {Opt_uid, "uid=%u"},
291         {Opt_umask, "umask=%o"},
292         {Opt_session, "session=%u"},
293         {Opt_lastblock, "lastblock=%u"},
294         {Opt_anchor, "anchor=%u"},
295         {Opt_volume, "volume=%u"},
296         {Opt_partition, "partition=%u"},
297         {Opt_fileset, "fileset=%u"},
298         {Opt_rootdir, "rootdir=%u"},
299         {Opt_utf8, "utf8"},
300         {Opt_iocharset, "iocharset=%s"},
301         {Opt_err, NULL}
302 };
303
304 static int
305 udf_parse_options(char *options, struct udf_options *uopt)
306 {
307         char *p;
308         int option;
309
310         uopt->novrs = 0;
311         uopt->blocksize = 2048;
312         uopt->partition = 0xFFFF;
313         uopt->session = 0xFFFFFFFF;
314         uopt->lastblock = 0;
315         uopt->anchor = 0;
316         uopt->volume = 0xFFFFFFFF;
317         uopt->rootdir = 0xFFFFFFFF;
318         uopt->fileset = 0xFFFFFFFF;
319         uopt->nls_map = NULL;
320
321         if (!options)
322                 return 1;
323
324         while ((p = strsep(&options, ",")) != NULL)
325         {
326                 substring_t args[MAX_OPT_ARGS];
327                 int token;
328                 if (!*p)
329                         continue;
330
331                 token = match_token(p, tokens, args);
332                 switch (token)
333                 {
334                         case Opt_novrs:
335                                 uopt->novrs = 1;
336                         case Opt_bs:
337                                 if (match_int(&args[0], &option))
338                                         return 0;
339                                 uopt->blocksize = option;
340                                 break;
341                         case Opt_unhide:
342                                 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
343                                 break;
344                         case Opt_undelete:
345                                 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
346                                 break;
347                         case Opt_noadinicb:
348                                 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
349                                 break;
350                         case Opt_adinicb:
351                                 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
352                                 break;
353                         case Opt_shortad:
354                                 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
355                                 break;
356                         case Opt_longad:
357                                 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
358                                 break;
359                         case Opt_gid:
360                                 if (match_int(args, &option))
361                                         return 0;
362                                 uopt->gid = option;
363                                 break;
364                         case Opt_uid:
365                                 if (match_int(args, &option))
366                                         return 0;
367                                 uopt->uid = option;
368                                 break;
369                         case Opt_umask:
370                                 if (match_octal(args, &option))
371                                         return 0;
372                                 uopt->umask = option;
373                                 break;
374                         case Opt_nostrict:
375                                 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
376                                 break;
377                         case Opt_session:
378                                 if (match_int(args, &option))
379                                         return 0;
380                                 uopt->session = option;
381                                 break;
382                         case Opt_lastblock:
383                                 if (match_int(args, &option))
384                                         return 0;
385                                 uopt->lastblock = option;
386                                 break;
387                         case Opt_anchor:
388                                 if (match_int(args, &option))
389                                         return 0;
390                                 uopt->anchor = option;
391                                 break;
392                         case Opt_volume:
393                                 if (match_int(args, &option))
394                                         return 0;
395                                 uopt->volume = option;
396                                 break;
397                         case Opt_partition:
398                                 if (match_int(args, &option))
399                                         return 0;
400                                 uopt->partition = option;
401                                 break;
402                         case Opt_fileset:
403                                 if (match_int(args, &option))
404                                         return 0;
405                                 uopt->fileset = option;
406                                 break;
407                         case Opt_rootdir:
408                                 if (match_int(args, &option))
409                                         return 0;
410                                 uopt->rootdir = option;
411                                 break;
412                         case Opt_utf8:
413                                 uopt->flags |= (1 << UDF_FLAG_UTF8);
414                                 break;
415 #ifdef CONFIG_UDF_NLS
416                         case Opt_iocharset:
417                                 uopt->nls_map = load_nls(args[0].from);
418                                 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
419                                 break;
420 #endif
421                         case Opt_uignore:
422                                 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
423                                 break;
424                         case Opt_uforget:
425                                 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
426                                 break;
427                         case Opt_gignore:
428                             uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
429                                 break;
430                         case Opt_gforget:
431                             uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
432                                 break;
433                         default:
434                                 printk(KERN_ERR "udf: bad mount option \"%s\" "
435                                                 "or missing value\n", p);
436                         return 0;
437                 }
438         }
439         return 1;
440 }
441
442 void
443 udf_write_super(struct super_block *sb)
444 {
445         lock_kernel();
446         if (!(sb->s_flags & MS_RDONLY))
447                 udf_open_lvid(sb);
448         sb->s_dirt = 0;
449         unlock_kernel();
450 }
451
452 static int
453 udf_remount_fs(struct super_block *sb, int *flags, char *options)
454 {
455         struct udf_options uopt;
456
457         uopt.flags = UDF_SB(sb)->s_flags ;
458         uopt.uid   = UDF_SB(sb)->s_uid ;
459         uopt.gid   = UDF_SB(sb)->s_gid ;
460         uopt.umask = UDF_SB(sb)->s_umask ;
461
462         if ( !udf_parse_options(options, &uopt) )
463                 return -EINVAL;
464
465         UDF_SB(sb)->s_flags = uopt.flags;
466         UDF_SB(sb)->s_uid   = uopt.uid;
467         UDF_SB(sb)->s_gid   = uopt.gid;
468         UDF_SB(sb)->s_umask = uopt.umask;
469
470         if (UDF_SB_LVIDBH(sb)) {
471                 int write_rev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev);
472                 if (write_rev > UDF_MAX_WRITE_VERSION)
473                         *flags |= MS_RDONLY;
474         }
475
476         if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
477                 return 0;
478         if (*flags & MS_RDONLY)
479                 udf_close_lvid(sb);
480         else
481                 udf_open_lvid(sb);
482
483         return 0;
484 }
485
486 /*
487  * udf_set_blocksize
488  *
489  * PURPOSE
490  *      Set the block size to be used in all transfers.
491  *
492  * DESCRIPTION
493  *      To allow room for a DMA transfer, it is best to guess big when unsure.
494  *      This routine picks 2048 bytes as the blocksize when guessing. This
495  *      should be adequate until devices with larger block sizes become common.
496  *
497  *      Note that the Linux kernel can currently only deal with blocksizes of
498  *      512, 1024, 2048, 4096, and 8192 bytes.
499  *
500  * PRE-CONDITIONS
501  *      sb                      Pointer to _locked_ superblock.
502  *
503  * POST-CONDITIONS
504  *      sb->s_blocksize         Blocksize.
505  *      sb->s_blocksize_bits    log2 of blocksize.
506  *      <return>        0       Blocksize is valid.
507  *      <return>        1       Blocksize is invalid.
508  *
509  * HISTORY
510  *      July 1, 1997 - Andrew E. Mileski
511  *      Written, tested, and released.
512  */
513 static  int
514 udf_set_blocksize(struct super_block *sb, int bsize)
515 {
516         if (!sb_min_blocksize(sb, bsize)) {
517                 udf_debug("Bad block size (%d)\n", bsize);
518                 printk(KERN_ERR "udf: bad block size (%d)\n", bsize);
519                 return 0;
520         }
521         return sb->s_blocksize;
522 }
523
524 static int
525 udf_vrs(struct super_block *sb, int silent)
526 {
527         struct volStructDesc *vsd = NULL;
528         int sector = 32768;
529         int sectorsize;
530         struct buffer_head *bh = NULL;
531         int iso9660=0;
532         int nsr02=0;
533         int nsr03=0;
534
535         /* Block size must be a multiple of 512 */
536         if (sb->s_blocksize & 511)
537                 return 0;
538
539         if (sb->s_blocksize < sizeof(struct volStructDesc))
540                 sectorsize = sizeof(struct volStructDesc);
541         else
542                 sectorsize = sb->s_blocksize;
543
544         sector += (UDF_SB_SESSION(sb) << sb->s_blocksize_bits);
545
546         udf_debug("Starting at sector %u (%ld byte sectors)\n",
547                 (sector >> sb->s_blocksize_bits), sb->s_blocksize);
548         /* Process the sequence (if applicable) */
549         for (;!nsr02 && !nsr03; sector += sectorsize)
550         {
551                 /* Read a block */
552                 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
553                 if (!bh)
554                         break;
555
556                 /* Look for ISO  descriptors */
557                 vsd = (struct volStructDesc *)(bh->b_data +
558                         (sector & (sb->s_blocksize - 1)));
559
560                 if (vsd->stdIdent[0] == 0)
561                 {
562                         udf_release_data(bh);
563                         break;
564                 }
565                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN))
566                 {
567                         iso9660 = sector;
568                         switch (vsd->structType)
569                         {
570                                 case 0: 
571                                         udf_debug("ISO9660 Boot Record found\n");
572                                         break;
573                                 case 1: 
574                                         udf_debug("ISO9660 Primary Volume Descriptor found\n");
575                                         break;
576                                 case 2: 
577                                         udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
578                                         break;
579                                 case 3: 
580                                         udf_debug("ISO9660 Volume Partition Descriptor found\n");
581                                         break;
582                                 case 255: 
583                                         udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
584                                         break;
585                                 default: 
586                                         udf_debug("ISO9660 VRS (%u) found\n", vsd->structType);
587                                         break;
588                         }
589                 }
590                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN))
591                 {
592                 }
593                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01, VSD_STD_ID_LEN))
594                 {
595                         udf_release_data(bh);
596                         break;
597                 }
598                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN))
599                 {
600                         nsr02 = sector;
601                 }
602                 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN))
603                 {
604                         nsr03 = sector;
605                 }
606                 udf_release_data(bh);
607         }
608
609         if (nsr03)
610                 return nsr03;
611         else if (nsr02)
612                 return nsr02;
613         else if (sector - (UDF_SB_SESSION(sb) << sb->s_blocksize_bits) == 32768)
614                 return -1;
615         else
616                 return 0;
617 }
618
619 /*
620  * udf_find_anchor
621  *
622  * PURPOSE
623  *      Find an anchor volume descriptor.
624  *
625  * PRE-CONDITIONS
626  *      sb                      Pointer to _locked_ superblock.
627  *      lastblock               Last block on media.
628  *
629  * POST-CONDITIONS
630  *      <return>                1 if not found, 0 if ok
631  *
632  * HISTORY
633  *      July 1, 1997 - Andrew E. Mileski
634  *      Written, tested, and released.
635  */
636 static void
637 udf_find_anchor(struct super_block *sb)
638 {
639         int lastblock = UDF_SB_LASTBLOCK(sb);
640         struct buffer_head *bh = NULL;
641         uint16_t ident;
642         uint32_t location;
643         int i;
644
645         if (lastblock)
646         {
647                 int varlastblock = udf_variable_to_fixed(lastblock);
648                 int last[] =  { lastblock, lastblock - 2,
649                                 lastblock - 150, lastblock - 152,
650                                 varlastblock, varlastblock - 2,
651                                 varlastblock - 150, varlastblock - 152 };
652
653                 lastblock = 0;
654
655                 /* Search for an anchor volume descriptor pointer */
656
657                 /*  according to spec, anchor is in either:
658                  *     block 256
659                  *     lastblock-256
660                  *     lastblock
661                  *  however, if the disc isn't closed, it could be 512 */
662
663                 for (i=0; (!lastblock && i<sizeof(last)/sizeof(int)); i++)
664                 {
665                         if (last[i] < 0 || !(bh = sb_bread(sb, last[i])))
666                         {
667                                 ident = location = 0;
668                         }
669                         else
670                         {
671                                 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
672                                 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
673                                 udf_release_data(bh);
674                         }
675         
676                         if (ident == TAG_IDENT_AVDP)
677                         {
678                                 if (location == last[i] - UDF_SB_SESSION(sb))
679                                 {
680                                         lastblock = UDF_SB_ANCHOR(sb)[0] = last[i] - UDF_SB_SESSION(sb);
681                                         UDF_SB_ANCHOR(sb)[1] = last[i] - 256 - UDF_SB_SESSION(sb);
682                                 }
683                                 else if (location == udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb))
684                                 {
685                                         UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
686                                         lastblock = UDF_SB_ANCHOR(sb)[0] = udf_variable_to_fixed(last[i]) - UDF_SB_SESSION(sb);
687                                         UDF_SB_ANCHOR(sb)[1] = lastblock - 256 - UDF_SB_SESSION(sb);
688                                 }
689                                 else
690                                         udf_debug("Anchor found at block %d, location mismatch %d.\n",
691                                                 last[i], location);
692                         }
693                         else if (ident == TAG_IDENT_FE || ident == TAG_IDENT_EFE)
694                         {
695                                 lastblock = last[i];
696                                 UDF_SB_ANCHOR(sb)[3] = 512;
697                         }
698                         else
699                         {
700                                 if (last[i] < 256 || !(bh = sb_bread(sb, last[i] - 256)))
701                                 {
702                                         ident = location = 0;
703                                 }
704                                 else
705                                 {
706                                         ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
707                                         location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
708                                         udf_release_data(bh);
709                                 }
710         
711                                 if (ident == TAG_IDENT_AVDP &&
712                                         location == last[i] - 256 - UDF_SB_SESSION(sb))
713                                 {
714                                         lastblock = last[i];
715                                         UDF_SB_ANCHOR(sb)[1] = last[i] - 256;
716                                 }
717                                 else
718                                 {
719                                         if (last[i] < 312 + UDF_SB_SESSION(sb) || !(bh = sb_bread(sb, last[i] - 312 - UDF_SB_SESSION(sb))))
720                                         {
721                                                 ident = location = 0;
722                                         }
723                                         else
724                                         {
725                                                 ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
726                                                 location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
727                                                 udf_release_data(bh);
728                                         }
729         
730                                         if (ident == TAG_IDENT_AVDP &&
731                                                 location == udf_variable_to_fixed(last[i]) - 256)
732                                         {
733                                                 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
734                                                 lastblock = udf_variable_to_fixed(last[i]);
735                                                 UDF_SB_ANCHOR(sb)[1] = lastblock - 256;
736                                         }
737                                 }
738                         }
739                 }
740         }
741
742         if (!lastblock)
743         {
744                 /* We havn't found the lastblock. check 312 */
745                 if ((bh = sb_bread(sb, 312 + UDF_SB_SESSION(sb))))
746                 {
747                         ident = le16_to_cpu(((tag *)bh->b_data)->tagIdent);
748                         location = le32_to_cpu(((tag *)bh->b_data)->tagLocation);
749                         udf_release_data(bh);
750
751                         if (ident == TAG_IDENT_AVDP && location == 256)
752                                 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
753                 }
754         }
755
756         for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++)
757         {
758                 if (UDF_SB_ANCHOR(sb)[i])
759                 {
760                         if (!(bh = udf_read_tagged(sb,
761                                 UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident)))
762                         {
763                                 UDF_SB_ANCHOR(sb)[i] = 0;
764                         }
765                         else
766                         {
767                                 udf_release_data(bh);
768                                 if ((ident != TAG_IDENT_AVDP) && (i ||
769                                         (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE)))
770                                 {
771                                         UDF_SB_ANCHOR(sb)[i] = 0;
772                                 }
773                         }
774                 }
775         }
776
777         UDF_SB_LASTBLOCK(sb) = lastblock;
778 }
779
780 static int 
781 udf_find_fileset(struct super_block *sb, kernel_lb_addr *fileset, kernel_lb_addr *root)
782 {
783         struct buffer_head *bh = NULL;
784         long lastblock;
785         uint16_t ident;
786
787         if (fileset->logicalBlockNum != 0xFFFFFFFF ||
788                 fileset->partitionReferenceNum != 0xFFFF)
789         {
790                 bh = udf_read_ptagged(sb, *fileset, 0, &ident);
791
792                 if (!bh)
793                         return 1;
794                 else if (ident != TAG_IDENT_FSD)
795                 {
796                         udf_release_data(bh);
797                         return 1;
798                 }
799                         
800         }
801
802         if (!bh) /* Search backwards through the partitions */
803         {
804                 kernel_lb_addr newfileset;
805
806                 return 1;
807                 
808                 for (newfileset.partitionReferenceNum=UDF_SB_NUMPARTS(sb)-1;
809                         (newfileset.partitionReferenceNum != 0xFFFF &&
810                                 fileset->logicalBlockNum == 0xFFFFFFFF &&
811                                 fileset->partitionReferenceNum == 0xFFFF);
812                         newfileset.partitionReferenceNum--)
813                 {
814                         lastblock = UDF_SB_PARTLEN(sb, newfileset.partitionReferenceNum);
815                         newfileset.logicalBlockNum = 0;
816
817                         do
818                         {
819                                 bh = udf_read_ptagged(sb, newfileset, 0, &ident);
820                                 if (!bh)
821                                 {
822                                         newfileset.logicalBlockNum ++;
823                                         continue;
824                                 }
825
826                                 switch (ident)
827                                 {
828                                         case TAG_IDENT_SBD:
829                                         {
830                                                 struct spaceBitmapDesc *sp;
831                                                 sp = (struct spaceBitmapDesc *)bh->b_data;
832                                                 newfileset.logicalBlockNum += 1 +
833                                                         ((le32_to_cpu(sp->numOfBytes) + sizeof(struct spaceBitmapDesc) - 1)
834                                                                 >> sb->s_blocksize_bits);
835                                                 udf_release_data(bh);
836                                                 break;
837                                         }
838                                         case TAG_IDENT_FSD:
839                                         {
840                                                 *fileset = newfileset;
841                                                 break;
842                                         }
843                                         default:
844                                         {
845                                                 newfileset.logicalBlockNum ++;
846                                                 udf_release_data(bh);
847                                                 bh = NULL;
848                                                 break;
849                                         }
850                                 }
851                         }
852                         while (newfileset.logicalBlockNum < lastblock &&
853                                 fileset->logicalBlockNum == 0xFFFFFFFF &&
854                                 fileset->partitionReferenceNum == 0xFFFF);
855                 }
856         }
857
858         if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
859                 fileset->partitionReferenceNum != 0xFFFF) && bh)
860         {
861                 udf_debug("Fileset at block=%d, partition=%d\n",
862                         fileset->logicalBlockNum, fileset->partitionReferenceNum);
863
864                 UDF_SB_PARTITION(sb) = fileset->partitionReferenceNum;
865                 udf_load_fileset(sb, bh, root);
866                 udf_release_data(bh);
867                 return 0;
868         }
869         return 1;
870 }
871
872 static void 
873 udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
874 {
875         struct primaryVolDesc *pvoldesc;
876         time_t recording;
877         long recording_usec;
878         struct ustr instr;
879         struct ustr outstr;
880
881         pvoldesc = (struct primaryVolDesc *)bh->b_data;
882
883         if ( udf_stamp_to_time(&recording, &recording_usec,
884                 lets_to_cpu(pvoldesc->recordingDateAndTime)) )
885         {
886                 kernel_timestamp ts;
887                 ts = lets_to_cpu(pvoldesc->recordingDateAndTime);
888                 udf_debug("recording time %ld/%ld, %04u/%02u/%02u %02u:%02u (%x)\n",
889                         recording, recording_usec,
890                         ts.year, ts.month, ts.day, ts.hour, ts.minute, ts.typeAndTimezone);
891                 UDF_SB_RECORDTIME(sb).tv_sec = recording;
892                 UDF_SB_RECORDTIME(sb).tv_nsec = recording_usec * 1000;
893         }
894
895         if ( !udf_build_ustr(&instr, pvoldesc->volIdent, 32) )
896         {
897                 if (udf_CS0toUTF8(&outstr, &instr))
898                 {
899                         strncpy( UDF_SB_VOLIDENT(sb), outstr.u_name,
900                                 outstr.u_len > 31 ? 31 : outstr.u_len);
901                         udf_debug("volIdent[] = '%s'\n", UDF_SB_VOLIDENT(sb));
902                 }
903         }
904
905         if ( !udf_build_ustr(&instr, pvoldesc->volSetIdent, 128) )
906         {
907                 if (udf_CS0toUTF8(&outstr, &instr))
908                         udf_debug("volSetIdent[] = '%s'\n", outstr.u_name);
909         }
910 }
911
912 static void 
913 udf_load_fileset(struct super_block *sb, struct buffer_head *bh, kernel_lb_addr *root)
914 {
915         struct fileSetDesc *fset;
916
917         fset = (struct fileSetDesc *)bh->b_data;
918
919         *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
920
921         UDF_SB_SERIALNUM(sb) = le16_to_cpu(fset->descTag.tagSerialNum);
922
923         udf_debug("Rootdir at block=%d, partition=%d\n", 
924                 root->logicalBlockNum, root->partitionReferenceNum);
925 }
926
927 static void 
928 udf_load_partdesc(struct super_block *sb, struct buffer_head *bh)
929 {
930         struct partitionDesc *p;
931         int i;
932
933         p = (struct partitionDesc *)bh->b_data;
934
935         for (i=0; i<UDF_SB_NUMPARTS(sb); i++)
936         {
937                 udf_debug("Searching map: (%d == %d)\n", 
938                         UDF_SB_PARTMAPS(sb)[i].s_partition_num, le16_to_cpu(p->partitionNumber));
939                 if (UDF_SB_PARTMAPS(sb)[i].s_partition_num == le16_to_cpu(p->partitionNumber))
940                 {
941                         UDF_SB_PARTLEN(sb,i) = le32_to_cpu(p->partitionLength); /* blocks */
942                         UDF_SB_PARTROOT(sb,i) = le32_to_cpu(p->partitionStartingLocation);
943                         if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_READ_ONLY)
944                                 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_READ_ONLY;
945                         if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_WRITE_ONCE)
946                                 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_WRITE_ONCE;
947                         if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_REWRITABLE)
948                                 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_REWRITABLE;
949                         if (le32_to_cpu(p->accessType) == PD_ACCESS_TYPE_OVERWRITABLE)
950                                 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_OVERWRITABLE;
951
952                         if (!strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) ||
953                                 !strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
954                         {
955                                 struct partitionHeaderDesc *phd;
956
957                                 phd = (struct partitionHeaderDesc *)(p->partitionContentsUse);
958                                 if (phd->unallocSpaceTable.extLength)
959                                 {
960                                         kernel_lb_addr loc = { le32_to_cpu(phd->unallocSpaceTable.extPosition), i };
961
962                                         UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table =
963                                                 udf_iget(sb, loc);
964                                         UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_TABLE;
965                                         udf_debug("unallocSpaceTable (part %d) @ %ld\n",
966                                                 i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_table->i_ino);
967                                 }
968                                 if (phd->unallocSpaceBitmap.extLength)
969                                 {
970                                         UDF_SB_ALLOC_BITMAP(sb, i, s_uspace);
971                                         if (UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap != NULL)
972                                         {
973                                                 UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extLength =
974                                                         le32_to_cpu(phd->unallocSpaceBitmap.extLength);
975                                                 UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition =
976                                                         le32_to_cpu(phd->unallocSpaceBitmap.extPosition);
977                                                 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_UNALLOC_BITMAP;
978                                                 udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
979                                                         i, UDF_SB_PARTMAPS(sb)[i].s_uspace.s_bitmap->s_extPosition);
980                                         }
981                                 }
982                                 if (phd->partitionIntegrityTable.extLength)
983                                         udf_debug("partitionIntegrityTable (part %d)\n", i);
984                                 if (phd->freedSpaceTable.extLength)
985                                 {
986                                         kernel_lb_addr loc = { le32_to_cpu(phd->freedSpaceTable.extPosition), i };
987
988                                         UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table =
989                                                 udf_iget(sb, loc);
990                                         UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_TABLE;
991                                         udf_debug("freedSpaceTable (part %d) @ %ld\n",
992                                                 i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_table->i_ino);
993                                 }
994                                 if (phd->freedSpaceBitmap.extLength)
995                                 {
996                                         UDF_SB_ALLOC_BITMAP(sb, i, s_fspace);
997                                         if (UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap != NULL)
998                                         {
999                                                 UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extLength =
1000                                                         le32_to_cpu(phd->freedSpaceBitmap.extLength);
1001                                                 UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition =
1002                                                         le32_to_cpu(phd->freedSpaceBitmap.extPosition);
1003                                                 UDF_SB_PARTFLAGS(sb,i) |= UDF_PART_FLAG_FREED_BITMAP;
1004                                                 udf_debug("freedSpaceBitmap (part %d) @ %d\n",
1005                                                         i, UDF_SB_PARTMAPS(sb)[i].s_fspace.s_bitmap->s_extPosition);
1006                                         }
1007                                 }
1008                         }
1009                         break;
1010                 }
1011         }
1012         if (i == UDF_SB_NUMPARTS(sb))
1013         {
1014                 udf_debug("Partition (%d) not found in partition map\n", le16_to_cpu(p->partitionNumber));
1015         }
1016         else
1017         {
1018                 udf_debug("Partition (%d:%d type %x) starts at physical %d, block length %d\n",
1019                         le16_to_cpu(p->partitionNumber), i, UDF_SB_PARTTYPE(sb,i),
1020                         UDF_SB_PARTROOT(sb,i), UDF_SB_PARTLEN(sb,i));
1021         }
1022 }
1023
1024 static int 
1025 udf_load_logicalvol(struct super_block *sb, struct buffer_head * bh, kernel_lb_addr *fileset)
1026 {
1027         struct logicalVolDesc *lvd;
1028         int i, j, offset;
1029         uint8_t type;
1030
1031         lvd = (struct logicalVolDesc *)bh->b_data;
1032
1033         UDF_SB_ALLOC_PARTMAPS(sb, le32_to_cpu(lvd->numPartitionMaps));
1034
1035         for (i=0,offset=0;
1036                  i<UDF_SB_NUMPARTS(sb) && offset<le32_to_cpu(lvd->mapTableLength);
1037                  i++,offset+=((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapLength)
1038         {
1039                 type = ((struct genericPartitionMap *)&(lvd->partitionMaps[offset]))->partitionMapType;
1040                 if (type == 1)
1041                 {
1042                         struct genericPartitionMap1 *gpm1 = (struct genericPartitionMap1 *)&(lvd->partitionMaps[offset]);
1043                         UDF_SB_PARTTYPE(sb,i) = UDF_TYPE1_MAP15;
1044                         UDF_SB_PARTVSN(sb,i) = le16_to_cpu(gpm1->volSeqNum);
1045                         UDF_SB_PARTNUM(sb,i) = le16_to_cpu(gpm1->partitionNum);
1046                         UDF_SB_PARTFUNC(sb,i) = NULL;
1047                 }
1048                 else if (type == 2)
1049                 {
1050                         struct udfPartitionMap2 *upm2 = (struct udfPartitionMap2 *)&(lvd->partitionMaps[offset]);
1051                         if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL, strlen(UDF_ID_VIRTUAL)))
1052                         {
1053                                 if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0150)
1054                                 {
1055                                         UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP15;
1056                                         UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt15;
1057                                 }
1058                                 else if (le16_to_cpu(((__le16 *)upm2->partIdent.identSuffix)[0]) == 0x0200)
1059                                 {
1060                                         UDF_SB_PARTTYPE(sb,i) = UDF_VIRTUAL_MAP20;
1061                                         UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_virt20;
1062                                 }
1063                         }
1064                         else if (!strncmp(upm2->partIdent.ident, UDF_ID_SPARABLE, strlen(UDF_ID_SPARABLE)))
1065                         {
1066                                 uint32_t loc;
1067                                 uint16_t ident;
1068                                 struct sparingTable *st;
1069                                 struct sparablePartitionMap *spm = (struct sparablePartitionMap *)&(lvd->partitionMaps[offset]);
1070
1071                                 UDF_SB_PARTTYPE(sb,i) = UDF_SPARABLE_MAP15;
1072                                 UDF_SB_TYPESPAR(sb,i).s_packet_len = le16_to_cpu(spm->packetLength);
1073                                 for (j=0; j<spm->numSparingTables; j++)
1074                                 {
1075                                         loc = le32_to_cpu(spm->locSparingTable[j]);
1076                                         UDF_SB_TYPESPAR(sb,i).s_spar_map[j] =
1077                                                 udf_read_tagged(sb, loc, loc, &ident);
1078                                         if (UDF_SB_TYPESPAR(sb,i).s_spar_map[j] != NULL)
1079                                         {
1080                                                 st = (struct sparingTable *)UDF_SB_TYPESPAR(sb,i).s_spar_map[j]->b_data;
1081                                                 if (ident != 0 ||
1082                                                         strncmp(st->sparingIdent.ident, UDF_ID_SPARING, strlen(UDF_ID_SPARING)))
1083                                                 {
1084                                                         udf_release_data(UDF_SB_TYPESPAR(sb,i).s_spar_map[j]);
1085                                                         UDF_SB_TYPESPAR(sb,i).s_spar_map[j] = NULL;
1086                                                 }
1087                                         }
1088                                 }
1089                                 UDF_SB_PARTFUNC(sb,i) = udf_get_pblock_spar15;
1090                         }
1091                         else
1092                         {
1093                                 udf_debug("Unknown ident: %s\n", upm2->partIdent.ident);
1094                                 continue;
1095                         }
1096                         UDF_SB_PARTVSN(sb,i) = le16_to_cpu(upm2->volSeqNum);
1097                         UDF_SB_PARTNUM(sb,i) = le16_to_cpu(upm2->partitionNum);
1098                 }
1099                 udf_debug("Partition (%d:%d) type %d on volume %d\n",
1100                         i, UDF_SB_PARTNUM(sb,i), type, UDF_SB_PARTVSN(sb,i));
1101         }
1102
1103         if (fileset)
1104         {
1105                 long_ad *la = (long_ad *)&(lvd->logicalVolContentsUse[0]);
1106
1107                 *fileset = lelb_to_cpu(la->extLocation);
1108                 udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
1109                         fileset->logicalBlockNum,
1110                         fileset->partitionReferenceNum);
1111         }
1112         if (lvd->integritySeqExt.extLength)
1113                 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
1114         return 0;
1115 }
1116
1117 /*
1118  * udf_load_logicalvolint
1119  *
1120  */
1121 static void
1122 udf_load_logicalvolint(struct super_block *sb, kernel_extent_ad loc)
1123 {
1124         struct buffer_head *bh = NULL;
1125         uint16_t ident;
1126
1127         while (loc.extLength > 0 &&
1128                 (bh = udf_read_tagged(sb, loc.extLocation,
1129                         loc.extLocation, &ident)) &&
1130                 ident == TAG_IDENT_LVID)
1131         {
1132                 UDF_SB_LVIDBH(sb) = bh;
1133                 
1134                 if (UDF_SB_LVID(sb)->nextIntegrityExt.extLength)
1135                         udf_load_logicalvolint(sb, leea_to_cpu(UDF_SB_LVID(sb)->nextIntegrityExt));
1136                 
1137                 if (UDF_SB_LVIDBH(sb) != bh)
1138                         udf_release_data(bh);
1139                 loc.extLength -= sb->s_blocksize;
1140                 loc.extLocation ++;
1141         }
1142         if (UDF_SB_LVIDBH(sb) != bh)
1143                 udf_release_data(bh);
1144 }
1145
1146 /*
1147  * udf_process_sequence
1148  *
1149  * PURPOSE
1150  *      Process a main/reserve volume descriptor sequence.
1151  *
1152  * PRE-CONDITIONS
1153  *      sb                      Pointer to _locked_ superblock.
1154  *      block                   First block of first extent of the sequence.
1155  *      lastblock               Lastblock of first extent of the sequence.
1156  *
1157  * HISTORY
1158  *      July 1, 1997 - Andrew E. Mileski
1159  *      Written, tested, and released.
1160  */
1161 static  int
1162 udf_process_sequence(struct super_block *sb, long block, long lastblock, kernel_lb_addr *fileset)
1163 {
1164         struct buffer_head *bh = NULL;
1165         struct udf_vds_record vds[VDS_POS_LENGTH];
1166         struct generic_desc *gd;
1167         struct volDescPtr *vdp;
1168         int done=0;
1169         int i,j;
1170         uint32_t vdsn;
1171         uint16_t ident;
1172         long next_s = 0, next_e = 0;
1173
1174         memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1175
1176         /* Read the main descriptor sequence */
1177         for (;(!done && block <= lastblock); block++)
1178         {
1179
1180                 bh = udf_read_tagged(sb, block, block, &ident);
1181                 if (!bh) 
1182                         break;
1183
1184                 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1185                 gd = (struct generic_desc *)bh->b_data;
1186                 vdsn = le32_to_cpu(gd->volDescSeqNum);
1187                 switch (ident)
1188                 {
1189                         case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
1190                                 if (vdsn >= vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum)
1191                                 {
1192                                         vds[VDS_POS_PRIMARY_VOL_DESC].volDescSeqNum = vdsn;
1193                                         vds[VDS_POS_PRIMARY_VOL_DESC].block = block;
1194                                 }
1195                                 break;
1196                         case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
1197                                 if (vdsn >= vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum)
1198                                 {
1199                                         vds[VDS_POS_VOL_DESC_PTR].volDescSeqNum = vdsn;
1200                                         vds[VDS_POS_VOL_DESC_PTR].block = block;
1201
1202                                         vdp = (struct volDescPtr *)bh->b_data;
1203                                         next_s = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
1204                                         next_e = le32_to_cpu(vdp->nextVolDescSeqExt.extLength);
1205                                         next_e = next_e >> sb->s_blocksize_bits;
1206                                         next_e += next_s;
1207                                 }
1208                                 break;
1209                         case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
1210                                 if (vdsn >= vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum)
1211                                 {
1212                                         vds[VDS_POS_IMP_USE_VOL_DESC].volDescSeqNum = vdsn;
1213                                         vds[VDS_POS_IMP_USE_VOL_DESC].block = block;
1214                                 }
1215                                 break;
1216                         case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
1217                                 if (!vds[VDS_POS_PARTITION_DESC].block)
1218                                         vds[VDS_POS_PARTITION_DESC].block = block;
1219                                 break;
1220                         case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
1221                                 if (vdsn >= vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum)
1222                                 {
1223                                         vds[VDS_POS_LOGICAL_VOL_DESC].volDescSeqNum = vdsn;
1224                                         vds[VDS_POS_LOGICAL_VOL_DESC].block = block;
1225                                 }
1226                                 break;
1227                         case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
1228                                 if (vdsn >= vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum)
1229                                 {
1230                                         vds[VDS_POS_UNALLOC_SPACE_DESC].volDescSeqNum = vdsn;
1231                                         vds[VDS_POS_UNALLOC_SPACE_DESC].block = block;
1232                                 }
1233                                 break;
1234                         case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
1235                                 vds[VDS_POS_TERMINATING_DESC].block = block;
1236                                 if (next_e)
1237                                 {
1238                                         block = next_s;
1239                                         lastblock = next_e;
1240                                         next_s = next_e = 0;
1241                                 }
1242                                 else
1243                                         done = 1;
1244                                 break;
1245                 }
1246                 udf_release_data(bh);
1247         }
1248         for (i=0; i<VDS_POS_LENGTH; i++)
1249         {
1250                 if (vds[i].block)
1251                 {
1252                         bh = udf_read_tagged(sb, vds[i].block, vds[i].block, &ident);
1253
1254                         if (i == VDS_POS_PRIMARY_VOL_DESC)
1255                                 udf_load_pvoldesc(sb, bh);
1256                         else if (i == VDS_POS_LOGICAL_VOL_DESC)
1257                                 udf_load_logicalvol(sb, bh, fileset);
1258                         else if (i == VDS_POS_PARTITION_DESC)
1259                         {
1260                                 struct buffer_head *bh2 = NULL;
1261                                 udf_load_partdesc(sb, bh);
1262                                 for (j=vds[i].block+1; j<vds[VDS_POS_TERMINATING_DESC].block; j++)
1263                                 {
1264                                         bh2 = udf_read_tagged(sb, j, j, &ident);
1265                                         gd = (struct generic_desc *)bh2->b_data;
1266                                         if (ident == TAG_IDENT_PD)
1267                                                 udf_load_partdesc(sb, bh2);
1268                                         udf_release_data(bh2);
1269                                 }
1270                         }
1271                         udf_release_data(bh);
1272                 }
1273         }
1274
1275         return 0;
1276 }
1277
1278 /*
1279  * udf_check_valid()
1280  */
1281 static int
1282 udf_check_valid(struct super_block *sb, int novrs, int silent)
1283 {
1284         long block;
1285
1286         if (novrs)
1287         {
1288                 udf_debug("Validity check skipped because of novrs option\n");
1289                 return 0;
1290         }
1291         /* Check that it is NSR02 compliant */
1292         /* Process any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
1293         else if ((block = udf_vrs(sb, silent)) == -1)
1294         {
1295                 udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
1296                 if (!UDF_SB_LASTBLOCK(sb))
1297                         UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
1298                 return 0;
1299         }
1300         else 
1301                 return !block;
1302 }
1303
1304 static int
1305 udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
1306 {
1307         struct anchorVolDescPtr *anchor;
1308         uint16_t ident;
1309         struct buffer_head *bh;
1310         long main_s, main_e, reserve_s, reserve_e;
1311         int i, j;
1312
1313         if (!sb)
1314                 return 1;
1315
1316         for (i=0; i<sizeof(UDF_SB_ANCHOR(sb))/sizeof(int); i++)
1317         {
1318                 if (UDF_SB_ANCHOR(sb)[i] && (bh = udf_read_tagged(sb,
1319                         UDF_SB_ANCHOR(sb)[i], UDF_SB_ANCHOR(sb)[i], &ident)))
1320                 {
1321                         anchor = (struct anchorVolDescPtr *)bh->b_data;
1322
1323                         /* Locate the main sequence */
1324                         main_s = le32_to_cpu( anchor->mainVolDescSeqExt.extLocation );
1325                         main_e = le32_to_cpu( anchor->mainVolDescSeqExt.extLength );
1326                         main_e = main_e >> sb->s_blocksize_bits;
1327                         main_e += main_s;
1328         
1329                         /* Locate the reserve sequence */
1330                         reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1331                         reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1332                         reserve_e = reserve_e >> sb->s_blocksize_bits;
1333                         reserve_e += reserve_s;
1334
1335                         udf_release_data(bh);
1336
1337                         /* Process the main & reserve sequences */
1338                         /* responsible for finding the PartitionDesc(s) */
1339                         if (!(udf_process_sequence(sb, main_s, main_e, fileset) &&
1340                                 udf_process_sequence(sb, reserve_s, reserve_e, fileset)))
1341                         {
1342                                 break;
1343                         }
1344                 }
1345         }
1346
1347         if (i == sizeof(UDF_SB_ANCHOR(sb))/sizeof(int))
1348         {
1349                 udf_debug("No Anchor block found\n");
1350                 return 1;
1351         }
1352         else
1353                 udf_debug("Using anchor in block %d\n", UDF_SB_ANCHOR(sb)[i]);
1354
1355         for (i=0; i<UDF_SB_NUMPARTS(sb); i++)
1356         {
1357                 switch UDF_SB_PARTTYPE(sb, i)
1358                 {
1359                         case UDF_VIRTUAL_MAP15:
1360                         case UDF_VIRTUAL_MAP20:
1361                         {
1362                                 kernel_lb_addr ino;
1363
1364                                 if (!UDF_SB_LASTBLOCK(sb))
1365                                 {
1366                                         UDF_SB_LASTBLOCK(sb) = udf_get_last_block(sb);
1367                                         udf_find_anchor(sb);
1368                                 }
1369
1370                                 if (!UDF_SB_LASTBLOCK(sb))
1371                                 {
1372                                         udf_debug("Unable to determine Lastblock (For Virtual Partition)\n");
1373                                         return 1;
1374                                 }
1375
1376                                 for (j=0; j<UDF_SB_NUMPARTS(sb); j++)
1377                                 {
1378                                         if (j != i &&
1379                                                 UDF_SB_PARTVSN(sb,i) == UDF_SB_PARTVSN(sb,j) &&
1380                                                 UDF_SB_PARTNUM(sb,i) == UDF_SB_PARTNUM(sb,j))
1381                                         {
1382                                                 ino.partitionReferenceNum = j;
1383                                                 ino.logicalBlockNum = UDF_SB_LASTBLOCK(sb) -
1384                                                         UDF_SB_PARTROOT(sb,j);
1385                                                 break;
1386                                         }
1387                                 }
1388
1389                                 if (j == UDF_SB_NUMPARTS(sb))
1390                                         return 1;
1391
1392                                 if (!(UDF_SB_VAT(sb) = udf_iget(sb, ino)))
1393                                         return 1;
1394
1395                                 if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP15)
1396                                 {
1397                                         UDF_SB_TYPEVIRT(sb,i).s_start_offset = udf_ext0_offset(UDF_SB_VAT(sb));
1398                                         UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size - 36) >> 2;
1399                                 }
1400                                 else if (UDF_SB_PARTTYPE(sb,i) == UDF_VIRTUAL_MAP20)
1401                                 {
1402                                         struct buffer_head *bh = NULL;
1403                                         uint32_t pos;
1404
1405                                         pos = udf_block_map(UDF_SB_VAT(sb), 0);
1406                                         bh = sb_bread(sb, pos);
1407                                         UDF_SB_TYPEVIRT(sb,i).s_start_offset =
1408                                                 le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) +
1409                                                         udf_ext0_offset(UDF_SB_VAT(sb));
1410                                         UDF_SB_TYPEVIRT(sb,i).s_num_entries = (UDF_SB_VAT(sb)->i_size -
1411                                                 UDF_SB_TYPEVIRT(sb,i).s_start_offset) >> 2;
1412                                         udf_release_data(bh);
1413                                 }
1414                                 UDF_SB_PARTROOT(sb,i) = udf_get_pblock(sb, 0, i, 0);
1415                                 UDF_SB_PARTLEN(sb,i) = UDF_SB_PARTLEN(sb,ino.partitionReferenceNum);
1416                         }
1417                 }
1418         }
1419         return 0;
1420 }
1421
1422 static void udf_open_lvid(struct super_block *sb)
1423 {
1424         if (UDF_SB_LVIDBH(sb))
1425         {
1426                 int i;
1427                 kernel_timestamp cpu_time;
1428
1429                 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1430                 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1431                 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
1432                         UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
1433                 UDF_SB_LVID(sb)->integrityType = LVID_INTEGRITY_TYPE_OPEN;
1434
1435                 UDF_SB_LVID(sb)->descTag.descCRC =
1436                         cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
1437                         le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
1438
1439                 UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
1440                 for (i=0; i<16; i++)
1441                         if (i != 4)
1442                                 UDF_SB_LVID(sb)->descTag.tagChecksum +=
1443                                         ((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i];
1444
1445                 mark_buffer_dirty(UDF_SB_LVIDBH(sb));
1446         }
1447 }
1448
1449 static void udf_close_lvid(struct super_block *sb)
1450 {
1451         if (UDF_SB_LVIDBH(sb) &&
1452                 UDF_SB_LVID(sb)->integrityType == LVID_INTEGRITY_TYPE_OPEN)
1453         {
1454                 int i;
1455                 kernel_timestamp cpu_time;
1456
1457                 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1458                 UDF_SB_LVIDIU(sb)->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1459                 if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
1460                         UDF_SB_LVID(sb)->recordingDateAndTime = cpu_to_lets(cpu_time);
1461                 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev))
1462                         UDF_SB_LVIDIU(sb)->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1463                 if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev))
1464                         UDF_SB_LVIDIU(sb)->minUDFReadRev = cpu_to_le16(UDF_SB_UDFREV(sb));
1465                 if (UDF_SB_UDFREV(sb) > le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev))
1466                         UDF_SB_LVIDIU(sb)->minUDFWriteRev = cpu_to_le16(UDF_SB_UDFREV(sb));
1467                 UDF_SB_LVID(sb)->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
1468
1469                 UDF_SB_LVID(sb)->descTag.descCRC =
1470                         cpu_to_le16(udf_crc((char *)UDF_SB_LVID(sb) + sizeof(tag),
1471                         le16_to_cpu(UDF_SB_LVID(sb)->descTag.descCRCLength), 0));
1472
1473                 UDF_SB_LVID(sb)->descTag.tagChecksum = 0;
1474                 for (i=0; i<16; i++)
1475                         if (i != 4)
1476                                 UDF_SB_LVID(sb)->descTag.tagChecksum +=
1477                                         ((uint8_t *)&(UDF_SB_LVID(sb)->descTag))[i];
1478
1479                 mark_buffer_dirty(UDF_SB_LVIDBH(sb));
1480         }
1481 }
1482
1483 /*
1484  * udf_read_super
1485  *
1486  * PURPOSE
1487  *      Complete the specified super block.
1488  *
1489  * PRE-CONDITIONS
1490  *      sb                      Pointer to superblock to complete - never NULL.
1491  *      sb->s_dev               Device to read suberblock from.
1492  *      options                 Pointer to mount options.
1493  *      silent                  Silent flag.
1494  *
1495  * HISTORY
1496  *      July 1, 1997 - Andrew E. Mileski
1497  *      Written, tested, and released.
1498  */
1499 static int udf_fill_super(struct super_block *sb, void *options, int silent)
1500 {
1501         int i;
1502         struct inode *inode=NULL;
1503         struct udf_options uopt;
1504         kernel_lb_addr rootdir, fileset;
1505         struct udf_sb_info *sbi;
1506
1507         uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1508         uopt.uid = -1;
1509         uopt.gid = -1;
1510         uopt.umask = 0;
1511
1512         sbi = kmalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
1513         if (!sbi)
1514                 return -ENOMEM;
1515         sb->s_fs_info = sbi;
1516         memset(UDF_SB(sb), 0x00, sizeof(struct udf_sb_info));
1517
1518         init_MUTEX(&sbi->s_alloc_sem);
1519
1520         if (!udf_parse_options((char *)options, &uopt))
1521                 goto error_out;
1522
1523         if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
1524             uopt.flags & (1 << UDF_FLAG_NLS_MAP))
1525         {
1526                 udf_error(sb, "udf_read_super",
1527                         "utf8 cannot be combined with iocharset\n");
1528                 goto error_out;
1529         }
1530 #ifdef CONFIG_UDF_NLS
1531         if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map)
1532         {
1533                 uopt.nls_map = load_nls_default();
1534                 if (!uopt.nls_map)
1535                         uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1536                 else
1537                         udf_debug("Using default NLS map\n");
1538         }
1539 #endif
1540         if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1541                 uopt.flags |= (1 << UDF_FLAG_UTF8);
1542
1543         fileset.logicalBlockNum = 0xFFFFFFFF;
1544         fileset.partitionReferenceNum = 0xFFFF;
1545
1546         UDF_SB(sb)->s_flags = uopt.flags;
1547         UDF_SB(sb)->s_uid = uopt.uid;
1548         UDF_SB(sb)->s_gid = uopt.gid;
1549         UDF_SB(sb)->s_umask = uopt.umask;
1550         UDF_SB(sb)->s_nls_map = uopt.nls_map;
1551
1552         /* Set the block size for all transfers */
1553         if (!udf_set_blocksize(sb, uopt.blocksize))
1554                 goto error_out;
1555
1556         if ( uopt.session == 0xFFFFFFFF )
1557                 UDF_SB_SESSION(sb) = udf_get_last_session(sb);
1558         else
1559                 UDF_SB_SESSION(sb) = uopt.session;
1560
1561         udf_debug("Multi-session=%d\n", UDF_SB_SESSION(sb));
1562
1563         UDF_SB_LASTBLOCK(sb) = uopt.lastblock;
1564         UDF_SB_ANCHOR(sb)[0] = UDF_SB_ANCHOR(sb)[1] = 0;
1565         UDF_SB_ANCHOR(sb)[2] = uopt.anchor;
1566         UDF_SB_ANCHOR(sb)[3] = 256;
1567
1568         if (udf_check_valid(sb, uopt.novrs, silent)) /* read volume recognition sequences */
1569         {
1570                 printk("UDF-fs: No VRS found\n");
1571                 goto error_out;
1572         }
1573
1574         udf_find_anchor(sb);
1575
1576         /* Fill in the rest of the superblock */
1577         sb->s_op = &udf_sb_ops;
1578         sb->dq_op = NULL;
1579         sb->s_dirt = 0;
1580         sb->s_magic = UDF_SUPER_MAGIC;
1581         sb->s_time_gran = 1000;
1582
1583         if (udf_load_partition(sb, &fileset))
1584         {
1585                 printk("UDF-fs: No partition found (1)\n");
1586                 goto error_out;
1587         }
1588
1589         udf_debug("Lastblock=%d\n", UDF_SB_LASTBLOCK(sb));
1590
1591         if ( UDF_SB_LVIDBH(sb) )
1592         {
1593                 uint16_t minUDFReadRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev);
1594                 uint16_t minUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFWriteRev);
1595                 /* uint16_t maxUDFWriteRev = le16_to_cpu(UDF_SB_LVIDIU(sb)->maxUDFWriteRev); */
1596
1597                 if (minUDFReadRev > UDF_MAX_READ_VERSION)
1598                 {
1599                         printk("UDF-fs: minUDFReadRev=%x (max is %x)\n",
1600                                 le16_to_cpu(UDF_SB_LVIDIU(sb)->minUDFReadRev),
1601                                 UDF_MAX_READ_VERSION);
1602                         goto error_out;
1603                 }
1604                 else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
1605                 {
1606                         sb->s_flags |= MS_RDONLY;
1607                 }
1608
1609                 UDF_SB_UDFREV(sb) = minUDFWriteRev;
1610
1611                 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1612                         UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1613                 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1614                         UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1615         }
1616
1617         if ( !UDF_SB_NUMPARTS(sb) )
1618         {
1619                 printk("UDF-fs: No partition found (2)\n");
1620                 goto error_out;
1621         }
1622
1623         if ( udf_find_fileset(sb, &fileset, &rootdir) )
1624         {
1625                 printk("UDF-fs: No fileset found\n");
1626                 goto error_out;
1627         }
1628
1629         if (!silent)
1630         {
1631                 kernel_timestamp ts;
1632                 udf_time_to_stamp(&ts, UDF_SB_RECORDTIME(sb));
1633                 udf_info("UDF %s (%s) Mounting volume '%s', timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
1634                         UDFFS_VERSION, UDFFS_DATE,
1635                         UDF_SB_VOLIDENT(sb), ts.year, ts.month, ts.day, ts.hour, ts.minute,
1636                         ts.typeAndTimezone);
1637         }
1638         if (!(sb->s_flags & MS_RDONLY))
1639                 udf_open_lvid(sb);
1640
1641         /* Assign the root inode */
1642         /* assign inodes by physical block number */
1643         /* perhaps it's not extensible enough, but for now ... */
1644         inode = udf_iget(sb, rootdir); 
1645         if (!inode)
1646         {
1647                 printk("UDF-fs: Error in udf_iget, block=%d, partition=%d\n",
1648                         rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
1649                 goto error_out;
1650         }
1651
1652         /* Allocate a dentry for the root inode */
1653         sb->s_root = d_alloc_root(inode);
1654         if (!sb->s_root)
1655         {
1656                 printk("UDF-fs: Couldn't allocate root dentry\n");
1657                 iput(inode);
1658                 goto error_out;
1659         }
1660         sb->s_maxbytes = MAX_LFS_FILESIZE;
1661         return 0;
1662
1663 error_out:
1664         if (UDF_SB_VAT(sb))
1665                 iput(UDF_SB_VAT(sb));
1666         if (UDF_SB_NUMPARTS(sb))
1667         {
1668                 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
1669                         iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
1670                 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
1671                         iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
1672                 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
1673                         UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace);
1674                 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
1675                         UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace);
1676                 if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15)
1677                 {
1678                         for (i=0; i<4; i++)
1679                                 udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]);
1680                 }
1681         }
1682 #ifdef CONFIG_UDF_NLS
1683         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1684                 unload_nls(UDF_SB(sb)->s_nls_map);
1685 #endif
1686         if (!(sb->s_flags & MS_RDONLY))
1687                 udf_close_lvid(sb);
1688         udf_release_data(UDF_SB_LVIDBH(sb));
1689         UDF_SB_FREE(sb);
1690         kfree(sbi);
1691         sb->s_fs_info = NULL;
1692         return -EINVAL;
1693 }
1694
1695 void udf_error(struct super_block *sb, const char *function,
1696         const char *fmt, ...)
1697 {
1698         va_list args;
1699
1700         if (!(sb->s_flags & MS_RDONLY))
1701         {
1702                 /* mark sb error */
1703                 sb->s_dirt = 1;
1704         }
1705         va_start(args, fmt);
1706         vsprintf(error_buf, fmt, args);
1707         va_end(args);
1708         printk (KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
1709                 sb->s_id, function, error_buf);
1710 }
1711
1712 void udf_warning(struct super_block *sb, const char *function,
1713         const char *fmt, ...)
1714 {
1715         va_list args;
1716
1717         va_start (args, fmt);
1718         vsprintf(error_buf, fmt, args);
1719         va_end(args);
1720         printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
1721                 sb->s_id, function, error_buf);
1722 }
1723
1724 /*
1725  * udf_put_super
1726  *
1727  * PURPOSE
1728  *      Prepare for destruction of the superblock.
1729  *
1730  * DESCRIPTION
1731  *      Called before the filesystem is unmounted.
1732  *
1733  * HISTORY
1734  *      July 1, 1997 - Andrew E. Mileski
1735  *      Written, tested, and released.
1736  */
1737 static void
1738 udf_put_super(struct super_block *sb)
1739 {
1740         int i;
1741
1742         if (UDF_SB_VAT(sb))
1743                 iput(UDF_SB_VAT(sb));
1744         if (UDF_SB_NUMPARTS(sb))
1745         {
1746                 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
1747                         iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
1748                 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
1749                         iput(UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
1750                 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
1751                         UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_uspace);
1752                 if (UDF_SB_PARTFLAGS(sb, UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
1753                         UDF_SB_FREE_BITMAP(sb,UDF_SB_PARTITION(sb),s_fspace);
1754                 if (UDF_SB_PARTTYPE(sb, UDF_SB_PARTITION(sb)) == UDF_SPARABLE_MAP15)
1755                 {
1756                         for (i=0; i<4; i++)
1757                                 udf_release_data(UDF_SB_TYPESPAR(sb, UDF_SB_PARTITION(sb)).s_spar_map[i]);
1758                 }
1759         }
1760 #ifdef CONFIG_UDF_NLS
1761         if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
1762                 unload_nls(UDF_SB(sb)->s_nls_map);
1763 #endif
1764         if (!(sb->s_flags & MS_RDONLY))
1765                 udf_close_lvid(sb);
1766         udf_release_data(UDF_SB_LVIDBH(sb));
1767         UDF_SB_FREE(sb);
1768         kfree(sb->s_fs_info);
1769         sb->s_fs_info = NULL;
1770 }
1771
1772 /*
1773  * udf_stat_fs
1774  *
1775  * PURPOSE
1776  *      Return info about the filesystem.
1777  *
1778  * DESCRIPTION
1779  *      Called by sys_statfs()
1780  *
1781  * HISTORY
1782  *      July 1, 1997 - Andrew E. Mileski
1783  *      Written, tested, and released.
1784  */
1785 static int
1786 udf_statfs(struct super_block *sb, struct kstatfs *buf)
1787 {
1788         buf->f_type = UDF_SUPER_MAGIC;
1789         buf->f_bsize = sb->s_blocksize;
1790         buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));
1791         buf->f_bfree = udf_count_free(sb);
1792         buf->f_bavail = buf->f_bfree;
1793         buf->f_files = (UDF_SB_LVIDBH(sb) ?
1794                 (le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) +
1795                 le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs)) : 0) + buf->f_bfree;
1796         buf->f_ffree = buf->f_bfree;
1797         /* __kernel_fsid_t f_fsid */
1798         buf->f_namelen = UDF_NAME_LEN-2;
1799
1800         return 0;
1801 }
1802
1803 static unsigned char udf_bitmap_lookup[16] = {
1804         0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4
1805 };
1806
1807 static unsigned int
1808 udf_count_free_bitmap(struct super_block *sb, struct udf_bitmap *bitmap)
1809 {
1810         struct buffer_head *bh = NULL;
1811         unsigned int accum = 0;
1812         int index;
1813         int block = 0, newblock;
1814         kernel_lb_addr loc;
1815         uint32_t bytes;
1816         uint8_t value;
1817         uint8_t *ptr;
1818         uint16_t ident;
1819         struct spaceBitmapDesc *bm;
1820
1821         lock_kernel();
1822
1823         loc.logicalBlockNum = bitmap->s_extPosition;
1824         loc.partitionReferenceNum = UDF_SB_PARTITION(sb);
1825         bh = udf_read_ptagged(sb, loc, 0, &ident);
1826
1827         if (!bh)
1828         {
1829                 printk(KERN_ERR "udf: udf_count_free failed\n");
1830                 goto out;
1831         }
1832         else if (ident != TAG_IDENT_SBD)
1833         {
1834                 udf_release_data(bh);
1835                 printk(KERN_ERR "udf: udf_count_free failed\n");
1836                 goto out;
1837         }
1838
1839         bm = (struct spaceBitmapDesc *)bh->b_data;
1840         bytes = le32_to_cpu(bm->numOfBytes);
1841         index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
1842         ptr = (uint8_t *)bh->b_data;
1843
1844         while ( bytes > 0 )
1845         {
1846                 while ((bytes > 0) && (index < sb->s_blocksize))
1847                 {
1848                         value = ptr[index];
1849                         accum += udf_bitmap_lookup[ value & 0x0f ];
1850                         accum += udf_bitmap_lookup[ value >> 4 ];
1851                         index++;
1852                         bytes--;
1853                 }
1854                 if ( bytes )
1855                 {
1856                         udf_release_data(bh);
1857                         newblock = udf_get_lb_pblock(sb, loc, ++block);
1858                         bh = udf_tread(sb, newblock);
1859                         if (!bh)
1860                         {
1861                                 udf_debug("read failed\n");
1862                                 goto out;
1863                         }
1864                         index = 0;
1865                         ptr = (uint8_t *)bh->b_data;
1866                 }
1867         }
1868         udf_release_data(bh);
1869
1870 out:
1871         unlock_kernel();
1872
1873         return accum;
1874 }
1875
1876 static unsigned int
1877 udf_count_free_table(struct super_block *sb, struct inode * table)
1878 {
1879         unsigned int accum = 0;
1880         uint32_t extoffset, elen;
1881         kernel_lb_addr bloc, eloc;
1882         int8_t etype;
1883         struct buffer_head *bh = NULL;
1884
1885         lock_kernel();
1886
1887         bloc = UDF_I_LOCATION(table);
1888         extoffset = sizeof(struct unallocSpaceEntry);
1889
1890         while ((etype = udf_next_aext(table, &bloc, &extoffset, &eloc, &elen, &bh, 1)) != -1)
1891         {
1892                 accum += (elen >> table->i_sb->s_blocksize_bits);
1893         }
1894         udf_release_data(bh);
1895
1896         unlock_kernel();
1897
1898         return accum;
1899 }
1900         
1901 static unsigned int
1902 udf_count_free(struct super_block *sb)
1903 {
1904         unsigned int accum = 0;
1905
1906         if (UDF_SB_LVIDBH(sb))
1907         {
1908                 if (le32_to_cpu(UDF_SB_LVID(sb)->numOfPartitions) > UDF_SB_PARTITION(sb))
1909                 {
1910                         accum = le32_to_cpu(UDF_SB_LVID(sb)->freeSpaceTable[UDF_SB_PARTITION(sb)]);
1911
1912                         if (accum == 0xFFFFFFFF)
1913                                 accum = 0;
1914                 }
1915         }
1916
1917         if (accum)
1918                 return accum;
1919
1920         if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_BITMAP)
1921         {
1922                 accum += udf_count_free_bitmap(sb,
1923                         UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_bitmap);
1924         }
1925         if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_BITMAP)
1926         {
1927                 accum += udf_count_free_bitmap(sb,
1928                         UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_bitmap);
1929         }
1930         if (accum)
1931                 return accum;
1932
1933         if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_UNALLOC_TABLE)
1934         {
1935                 accum += udf_count_free_table(sb,
1936                         UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_uspace.s_table);
1937         }
1938         if (UDF_SB_PARTFLAGS(sb,UDF_SB_PARTITION(sb)) & UDF_PART_FLAG_FREED_TABLE)
1939         {
1940                 accum += udf_count_free_table(sb,
1941                         UDF_SB_PARTMAPS(sb)[UDF_SB_PARTITION(sb)].s_fspace.s_table);
1942         }
1943
1944         return accum;
1945 }