blob: 65412d84a45d7c5e6e8563111c7ca4b66cec32b7 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * 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
Marcin Slusarz3a71fc52008-02-08 04:20:28 -080036 * 12/06/98 blf really hosed things royally. vat/sparing support. sequenced
37 * vol descs. rewrote option handling based on isofs
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 * 12/20/98 find the free space bitmap (if it exists)
39 */
40
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070041#include "udfdecl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/blkdev.h>
44#include <linux/slab.h>
45#include <linux/kernel.h>
46#include <linux/module.h>
47#include <linux/parser.h>
48#include <linux/stat.h>
49#include <linux/cdrom.h>
50#include <linux/nls.h>
51#include <linux/smp_lock.h>
52#include <linux/buffer_head.h>
53#include <linux/vfs.h>
54#include <linux/vmalloc.h>
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -080055#include <linux/errno.h>
Miklos Szeredi6da80892008-02-08 04:21:50 -080056#include <linux/mount.h>
57#include <linux/seq_file.h>
Marcin Slusarz01b954a2008-02-02 22:37:07 +010058#include <linux/bitmap.h>
Bob Copelandf845fce2008-04-17 09:47:48 +020059#include <linux/crc-itu-t.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <asm/byteorder.h>
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include "udf_sb.h"
63#include "udf_i.h"
64
65#include <linux/init.h>
66#include <asm/uaccess.h>
67
68#define VDS_POS_PRIMARY_VOL_DESC 0
69#define VDS_POS_UNALLOC_SPACE_DESC 1
70#define VDS_POS_LOGICAL_VOL_DESC 2
71#define VDS_POS_PARTITION_DESC 3
72#define VDS_POS_IMP_USE_VOL_DESC 4
73#define VDS_POS_VOL_DESC_PTR 5
74#define VDS_POS_TERMINATING_DESC 6
75#define VDS_POS_LENGTH 7
76
Miklos Szeredi6da80892008-02-08 04:21:50 -080077#define UDF_DEFAULT_BLOCKSIZE 2048
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079static char error_buf[1024];
80
81/* These are the "meat" - everything else is stuffing */
82static int udf_fill_super(struct super_block *, void *, int);
83static void udf_put_super(struct super_block *);
Jan Kara146bca72009-03-16 18:27:37 +010084static int udf_sync_fs(struct super_block *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085static int udf_remount_fs(struct super_block *, int *, char *);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020086static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020087static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
88 struct kernel_lb_addr *);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070089static void udf_load_fileset(struct super_block *, struct buffer_head *,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +020090 struct kernel_lb_addr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091static void udf_open_lvid(struct super_block *);
92static void udf_close_lvid(struct super_block *);
93static unsigned int udf_count_free(struct super_block *);
David Howells726c3342006-06-23 02:02:58 -070094static int udf_statfs(struct dentry *, struct kstatfs *);
Miklos Szeredi6da80892008-02-08 04:21:50 -080095static int udf_show_options(struct seq_file *, struct vfsmount *);
Adrian Bunkb8145a72008-02-17 10:19:55 +020096static void udf_error(struct super_block *sb, const char *function,
97 const char *fmt, ...);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Marcin Slusarz6c79e982008-02-08 04:20:30 -080099struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
100{
Marcin Slusarz4b111112008-02-08 04:20:36 -0800101 struct logicalVolIntegrityDesc *lvid =
102 (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800103 __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800104 __u32 offset = number_of_partitions * 2 *
105 sizeof(uint32_t)/sizeof(uint8_t);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800106 return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
107}
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109/* UDF filesystem type */
David Howells454e2392006-06-23 02:02:57 -0700110static int udf_get_sb(struct file_system_type *fs_type,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700111 int flags, const char *dev_name, void *data,
112 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113{
David Howells454e2392006-06-23 02:02:57 -0700114 return get_sb_bdev(fs_type, flags, dev_name, data, udf_fill_super, mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115}
116
117static struct file_system_type udf_fstype = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700118 .owner = THIS_MODULE,
119 .name = "udf",
120 .get_sb = udf_get_sb,
121 .kill_sb = kill_block_super,
122 .fs_flags = FS_REQUIRES_DEV,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123};
124
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700125static struct kmem_cache *udf_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127static struct inode *udf_alloc_inode(struct super_block *sb)
128{
129 struct udf_inode_info *ei;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800130 ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 if (!ei)
132 return NULL;
Dan Bastone95f87972006-08-13 23:24:18 -0700133
134 ei->i_unique = 0;
135 ei->i_lenExtents = 0;
136 ei->i_next_alloc_block = 0;
137 ei->i_next_alloc_goal = 0;
138 ei->i_strat4096 = 0;
139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 return &ei->vfs_inode;
141}
142
143static void udf_destroy_inode(struct inode *inode)
144{
145 kmem_cache_free(udf_inode_cachep, UDF_I(inode));
146}
147
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700148static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700150 struct udf_inode_info *ei = (struct udf_inode_info *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
Christoph Lametera35afb82007-05-16 22:10:57 -0700152 ei->i_ext.i_data = NULL;
153 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154}
155
156static int init_inodecache(void)
157{
158 udf_inode_cachep = kmem_cache_create("udf_inode_cache",
159 sizeof(struct udf_inode_info),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700160 0, (SLAB_RECLAIM_ACCOUNT |
161 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900162 init_once);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700163 if (!udf_inode_cachep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 return -ENOMEM;
165 return 0;
166}
167
168static void destroy_inodecache(void)
169{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700170 kmem_cache_destroy(udf_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171}
172
173/* Superblock operations */
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800174static const struct super_operations udf_sb_ops = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700175 .alloc_inode = udf_alloc_inode,
176 .destroy_inode = udf_destroy_inode,
177 .write_inode = udf_write_inode,
Al Viro3aac2b62010-06-07 00:43:39 -0400178 .evict_inode = udf_evict_inode,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700179 .put_super = udf_put_super,
Jan Kara146bca72009-03-16 18:27:37 +0100180 .sync_fs = udf_sync_fs,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700181 .statfs = udf_statfs,
182 .remount_fs = udf_remount_fs,
Miklos Szeredi6da80892008-02-08 04:21:50 -0800183 .show_options = udf_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184};
185
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700186struct udf_options {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 unsigned char novrs;
188 unsigned int blocksize;
189 unsigned int session;
190 unsigned int lastblock;
191 unsigned int anchor;
192 unsigned int volume;
193 unsigned short partition;
194 unsigned int fileset;
195 unsigned int rootdir;
196 unsigned int flags;
197 mode_t umask;
198 gid_t gid;
199 uid_t uid;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100200 mode_t fmode;
201 mode_t dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 struct nls_table *nls_map;
203};
204
205static int __init init_udf_fs(void)
206{
207 int err;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 err = init_inodecache();
210 if (err)
211 goto out1;
212 err = register_filesystem(&udf_fstype);
213 if (err)
214 goto out;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700215
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 return 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700217
218out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 destroy_inodecache();
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700220
221out1:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 return err;
223}
224
225static void __exit exit_udf_fs(void)
226{
227 unregister_filesystem(&udf_fstype);
228 destroy_inodecache();
229}
230
231module_init(init_udf_fs)
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700232module_exit(exit_udf_fs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800234static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
235{
236 struct udf_sb_info *sbi = UDF_SB(sb);
237
238 sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
239 GFP_KERNEL);
240 if (!sbi->s_partmaps) {
Harvey Harrison8e24eea2008-04-30 00:55:09 -0700241 udf_error(sb, __func__,
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -0800242 "Unable to allocate space for %d partition maps",
243 count);
244 sbi->s_partitions = 0;
245 return -ENOMEM;
246 }
247
248 sbi->s_partitions = count;
249 return 0;
250}
251
Miklos Szeredi6da80892008-02-08 04:21:50 -0800252static int udf_show_options(struct seq_file *seq, struct vfsmount *mnt)
253{
254 struct super_block *sb = mnt->mnt_sb;
255 struct udf_sb_info *sbi = UDF_SB(sb);
256
257 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT))
258 seq_puts(seq, ",nostrict");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100259 if (UDF_QUERY_FLAG(sb, UDF_FLAG_BLOCKSIZE_SET))
Miklos Szeredi6da80892008-02-08 04:21:50 -0800260 seq_printf(seq, ",bs=%lu", sb->s_blocksize);
261 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
262 seq_puts(seq, ",unhide");
263 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
264 seq_puts(seq, ",undelete");
265 if (!UDF_QUERY_FLAG(sb, UDF_FLAG_USE_AD_IN_ICB))
266 seq_puts(seq, ",noadinicb");
267 if (UDF_QUERY_FLAG(sb, UDF_FLAG_USE_SHORT_AD))
268 seq_puts(seq, ",shortad");
269 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
270 seq_puts(seq, ",uid=forget");
271 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
272 seq_puts(seq, ",uid=ignore");
273 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
274 seq_puts(seq, ",gid=forget");
275 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
276 seq_puts(seq, ",gid=ignore");
277 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
278 seq_printf(seq, ",uid=%u", sbi->s_uid);
279 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
280 seq_printf(seq, ",gid=%u", sbi->s_gid);
281 if (sbi->s_umask != 0)
282 seq_printf(seq, ",umask=%o", sbi->s_umask);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100283 if (sbi->s_fmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100284 seq_printf(seq, ",mode=%o", sbi->s_fmode);
Marcin Slusarz87bc7302008-12-02 13:40:11 +0100285 if (sbi->s_dmode != UDF_INVALID_MODE)
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100286 seq_printf(seq, ",dmode=%o", sbi->s_dmode);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800287 if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
288 seq_printf(seq, ",session=%u", sbi->s_session);
289 if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
290 seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
Jan Kara40346002009-03-19 16:21:38 +0100291 if (sbi->s_anchor != 0)
292 seq_printf(seq, ",anchor=%u", sbi->s_anchor);
Miklos Szeredi6da80892008-02-08 04:21:50 -0800293 /*
294 * volume, partition, fileset and rootdir seem to be ignored
295 * currently
296 */
297 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
298 seq_puts(seq, ",utf8");
299 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
300 seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
301
302 return 0;
303}
304
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305/*
306 * udf_parse_options
307 *
308 * PURPOSE
309 * Parse mount options.
310 *
311 * DESCRIPTION
312 * The following mount options are supported:
313 *
314 * gid= Set the default group.
315 * umask= Set the default umask.
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100316 * mode= Set the default file permissions.
317 * dmode= Set the default directory permissions.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 * uid= Set the default user.
319 * bs= Set the block size.
320 * unhide Show otherwise hidden files.
321 * undelete Show deleted files in lists.
322 * adinicb Embed data in the inode (default)
323 * noadinicb Don't embed data in the inode
324 * shortad Use short ad's
325 * longad Use long ad's (default)
326 * nostrict Unset strict conformance
327 * iocharset= Set the NLS character set
328 *
329 * The remaining are for debugging and disaster recovery:
330 *
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700331 * novrs Skip volume sequence recognition
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 *
333 * The following expect a offset from 0.
334 *
335 * session= Set the CDROM session (default= last session)
336 * anchor= Override standard anchor location. (default= 256)
337 * volume= Override the VolumeDesc location. (unused)
338 * partition= Override the PartitionDesc location. (unused)
339 * lastblock= Set the last block of the filesystem/
340 *
341 * The following expect a offset from the partition root.
342 *
343 * fileset= Override the fileset block location. (unused)
344 * rootdir= Override the root directory location. (unused)
345 * WARNING: overriding the rootdir to a non-directory may
346 * yield highly unpredictable results.
347 *
348 * PRE-CONDITIONS
349 * options Pointer to mount options string.
350 * uopts Pointer to mount options variable.
351 *
352 * POST-CONDITIONS
353 * <return> 1 Mount options parsed okay.
354 * <return> 0 Error parsing mount options.
355 *
356 * HISTORY
357 * July 1, 1997 - Andrew E. Mileski
358 * Written, tested, and released.
359 */
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361enum {
362 Opt_novrs, Opt_nostrict, Opt_bs, Opt_unhide, Opt_undelete,
363 Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
364 Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
365 Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
366 Opt_rootdir, Opt_utf8, Opt_iocharset,
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100367 Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
368 Opt_fmode, Opt_dmode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369};
370
Steven Whitehousea447c092008-10-13 10:46:57 +0100371static const match_table_t tokens = {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700372 {Opt_novrs, "novrs"},
373 {Opt_nostrict, "nostrict"},
374 {Opt_bs, "bs=%u"},
375 {Opt_unhide, "unhide"},
376 {Opt_undelete, "undelete"},
377 {Opt_noadinicb, "noadinicb"},
378 {Opt_adinicb, "adinicb"},
379 {Opt_shortad, "shortad"},
380 {Opt_longad, "longad"},
381 {Opt_uforget, "uid=forget"},
382 {Opt_uignore, "uid=ignore"},
383 {Opt_gforget, "gid=forget"},
384 {Opt_gignore, "gid=ignore"},
385 {Opt_gid, "gid=%u"},
386 {Opt_uid, "uid=%u"},
387 {Opt_umask, "umask=%o"},
388 {Opt_session, "session=%u"},
389 {Opt_lastblock, "lastblock=%u"},
390 {Opt_anchor, "anchor=%u"},
391 {Opt_volume, "volume=%u"},
392 {Opt_partition, "partition=%u"},
393 {Opt_fileset, "fileset=%u"},
394 {Opt_rootdir, "rootdir=%u"},
395 {Opt_utf8, "utf8"},
396 {Opt_iocharset, "iocharset=%s"},
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100397 {Opt_fmode, "mode=%o"},
398 {Opt_dmode, "dmode=%o"},
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700399 {Opt_err, NULL}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400};
401
Miklos Szeredi6da80892008-02-08 04:21:50 -0800402static int udf_parse_options(char *options, struct udf_options *uopt,
403 bool remount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404{
405 char *p;
406 int option;
407
408 uopt->novrs = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 uopt->partition = 0xFFFF;
410 uopt->session = 0xFFFFFFFF;
411 uopt->lastblock = 0;
412 uopt->anchor = 0;
413 uopt->volume = 0xFFFFFFFF;
414 uopt->rootdir = 0xFFFFFFFF;
415 uopt->fileset = 0xFFFFFFFF;
416 uopt->nls_map = NULL;
417
418 if (!options)
419 return 1;
420
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700421 while ((p = strsep(&options, ",")) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 substring_t args[MAX_OPT_ARGS];
423 int token;
424 if (!*p)
425 continue;
426
427 token = match_token(p, tokens, args);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700428 switch (token) {
429 case Opt_novrs:
430 uopt->novrs = 1;
Clemens Ladisch41368012009-03-06 09:16:49 +0100431 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700432 case Opt_bs:
433 if (match_int(&args[0], &option))
434 return 0;
435 uopt->blocksize = option;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +0100436 uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700437 break;
438 case Opt_unhide:
439 uopt->flags |= (1 << UDF_FLAG_UNHIDE);
440 break;
441 case Opt_undelete:
442 uopt->flags |= (1 << UDF_FLAG_UNDELETE);
443 break;
444 case Opt_noadinicb:
445 uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
446 break;
447 case Opt_adinicb:
448 uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
449 break;
450 case Opt_shortad:
451 uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
452 break;
453 case Opt_longad:
454 uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
455 break;
456 case Opt_gid:
457 if (match_int(args, &option))
458 return 0;
459 uopt->gid = option;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700460 uopt->flags |= (1 << UDF_FLAG_GID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700461 break;
462 case Opt_uid:
463 if (match_int(args, &option))
464 return 0;
465 uopt->uid = option;
Cyrill Gorcunovca76d2d2007-07-31 00:39:40 -0700466 uopt->flags |= (1 << UDF_FLAG_UID_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700467 break;
468 case Opt_umask:
469 if (match_octal(args, &option))
470 return 0;
471 uopt->umask = option;
472 break;
473 case Opt_nostrict:
474 uopt->flags &= ~(1 << UDF_FLAG_STRICT);
475 break;
476 case Opt_session:
477 if (match_int(args, &option))
478 return 0;
479 uopt->session = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800480 if (!remount)
481 uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700482 break;
483 case Opt_lastblock:
484 if (match_int(args, &option))
485 return 0;
486 uopt->lastblock = option;
Miklos Szeredi6da80892008-02-08 04:21:50 -0800487 if (!remount)
488 uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700489 break;
490 case Opt_anchor:
491 if (match_int(args, &option))
492 return 0;
493 uopt->anchor = option;
494 break;
495 case Opt_volume:
496 if (match_int(args, &option))
497 return 0;
498 uopt->volume = option;
499 break;
500 case Opt_partition:
501 if (match_int(args, &option))
502 return 0;
503 uopt->partition = option;
504 break;
505 case Opt_fileset:
506 if (match_int(args, &option))
507 return 0;
508 uopt->fileset = option;
509 break;
510 case Opt_rootdir:
511 if (match_int(args, &option))
512 return 0;
513 uopt->rootdir = option;
514 break;
515 case Opt_utf8:
516 uopt->flags |= (1 << UDF_FLAG_UTF8);
517 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700519 case Opt_iocharset:
520 uopt->nls_map = load_nls(args[0].from);
521 uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
522 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523#endif
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700524 case Opt_uignore:
525 uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
526 break;
527 case Opt_uforget:
528 uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
529 break;
530 case Opt_gignore:
531 uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
532 break;
533 case Opt_gforget:
534 uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
535 break;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100536 case Opt_fmode:
537 if (match_octal(args, &option))
538 return 0;
539 uopt->fmode = option & 0777;
540 break;
541 case Opt_dmode:
542 if (match_octal(args, &option))
543 return 0;
544 uopt->dmode = option & 0777;
545 break;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700546 default:
547 printk(KERN_ERR "udf: bad mount option \"%s\" "
548 "or missing value\n", p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 return 0;
550 }
551 }
552 return 1;
553}
554
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700555static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
557 struct udf_options uopt;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800558 struct udf_sb_info *sbi = UDF_SB(sb);
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400559 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800561 uopt.flags = sbi->s_flags;
562 uopt.uid = sbi->s_uid;
563 uopt.gid = sbi->s_gid;
564 uopt.umask = sbi->s_umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100565 uopt.fmode = sbi->s_fmode;
566 uopt.dmode = sbi->s_dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
Miklos Szeredi6da80892008-02-08 04:21:50 -0800568 if (!udf_parse_options(options, &uopt, true))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 return -EINVAL;
570
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200571 lock_kernel();
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800572 sbi->s_flags = uopt.flags;
573 sbi->s_uid = uopt.uid;
574 sbi->s_gid = uopt.gid;
575 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +0100576 sbi->s_fmode = uopt.fmode;
577 sbi->s_dmode = uopt.dmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800579 if (sbi->s_lvid_bh) {
580 int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 if (write_rev > UDF_MAX_WRITE_VERSION)
582 *flags |= MS_RDONLY;
583 }
584
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400585 if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
586 goto out_unlock;
587
Jan Kara36350462010-05-19 16:28:56 +0200588 if (*flags & MS_RDONLY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 udf_close_lvid(sb);
Jan Kara36350462010-05-19 16:28:56 +0200590 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 udf_open_lvid(sb);
592
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400593out_unlock:
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200594 unlock_kernel();
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400595 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596}
597
Jan Kara40346002009-03-19 16:21:38 +0100598/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
599/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
600static loff_t udf_check_vsd(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601{
602 struct volStructDesc *vsd = NULL;
Sebastian Manciuleaf4bcbbd2008-04-08 14:02:11 +0200603 loff_t sector = 32768;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 int sectorsize;
605 struct buffer_head *bh = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700606 int nsr02 = 0;
607 int nsr03 = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800608 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800610 sbi = UDF_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 if (sb->s_blocksize < sizeof(struct volStructDesc))
612 sectorsize = sizeof(struct volStructDesc);
613 else
614 sectorsize = sb->s_blocksize;
615
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800616 sector += (sbi->s_session << sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
618 udf_debug("Starting at sector %u (%ld byte sectors)\n",
Sebastian Manciulea706047a2008-04-14 17:13:01 +0200619 (unsigned int)(sector >> sb->s_blocksize_bits),
620 sb->s_blocksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 /* Process the sequence (if applicable) */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700622 for (; !nsr02 && !nsr03; sector += sectorsize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 /* Read a block */
624 bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
625 if (!bh)
626 break;
627
628 /* Look for ISO descriptors */
629 vsd = (struct volStructDesc *)(bh->b_data +
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800630 (sector & (sb->s_blocksize - 1)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700632 if (vsd->stdIdent[0] == 0) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700633 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800635 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
636 VSD_STD_ID_LEN)) {
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700637 switch (vsd->structType) {
638 case 0:
639 udf_debug("ISO9660 Boot Record found\n");
640 break;
641 case 1:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800642 udf_debug("ISO9660 Primary Volume Descriptor "
643 "found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700644 break;
645 case 2:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800646 udf_debug("ISO9660 Supplementary Volume "
647 "Descriptor found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700648 break;
649 case 3:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800650 udf_debug("ISO9660 Volume Partition Descriptor "
651 "found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700652 break;
653 case 255:
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800654 udf_debug("ISO9660 Volume Descriptor Set "
655 "Terminator found\n");
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700656 break;
657 default:
658 udf_debug("ISO9660 VRS (%u) found\n",
659 vsd->structType);
660 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 }
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800662 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
663 VSD_STD_ID_LEN))
664 ; /* nothing */
665 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
666 VSD_STD_ID_LEN)) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700667 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 break;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800669 } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
670 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 nsr02 = sector;
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800672 else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
673 VSD_STD_ID_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 nsr03 = sector;
Jan Kara3bf25cb2007-05-08 00:35:16 -0700675 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 }
677
678 if (nsr03)
679 return nsr03;
680 else if (nsr02)
681 return nsr02;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800682 else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 return -1;
684 else
685 return 0;
686}
687
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800688static int udf_find_fileset(struct super_block *sb,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200689 struct kernel_lb_addr *fileset,
690 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{
692 struct buffer_head *bh = NULL;
693 long lastblock;
694 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800695 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 if (fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700698 fileset->partitionReferenceNum != 0xFFFF) {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200699 bh = udf_read_ptagged(sb, fileset, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700701 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 return 1;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700703 } else if (ident != TAG_IDENT_FSD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -0700704 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 return 1;
706 }
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 }
709
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800710 sbi = UDF_SB(sb);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800711 if (!bh) {
712 /* Search backwards through the partitions */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200713 struct kernel_lb_addr newfileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700715/* --> cvg: FIXME - is it reasonable? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 return 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700717
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800718 for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700719 (newfileset.partitionReferenceNum != 0xFFFF &&
720 fileset->logicalBlockNum == 0xFFFFFFFF &&
721 fileset->partitionReferenceNum == 0xFFFF);
722 newfileset.partitionReferenceNum--) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800723 lastblock = sbi->s_partmaps
724 [newfileset.partitionReferenceNum]
725 .s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 newfileset.logicalBlockNum = 0;
727
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700728 do {
Pekka Enberg97e961f2008-10-15 12:29:03 +0200729 bh = udf_read_ptagged(sb, &newfileset, 0,
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800730 &ident);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700731 if (!bh) {
732 newfileset.logicalBlockNum++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 continue;
734 }
735
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700736 switch (ident) {
737 case TAG_IDENT_SBD:
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700738 {
739 struct spaceBitmapDesc *sp;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800740 sp = (struct spaceBitmapDesc *)
741 bh->b_data;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700742 newfileset.logicalBlockNum += 1 +
743 ((le32_to_cpu(sp->numOfBytes) +
Marcin Slusarz4b111112008-02-08 04:20:36 -0800744 sizeof(struct spaceBitmapDesc)
745 - 1) >> sb->s_blocksize_bits);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700746 brelse(bh);
747 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 }
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700749 case TAG_IDENT_FSD:
750 *fileset = newfileset;
751 break;
752 default:
753 newfileset.logicalBlockNum++;
754 brelse(bh);
755 bh = NULL;
756 break;
757 }
758 } while (newfileset.logicalBlockNum < lastblock &&
759 fileset->logicalBlockNum == 0xFFFFFFFF &&
760 fileset->partitionReferenceNum == 0xFFFF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 }
762 }
763
764 if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700765 fileset->partitionReferenceNum != 0xFFFF) && bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 udf_debug("Fileset at block=%d, partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700767 fileset->logicalBlockNum,
768 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800770 sbi->s_partition = fileset->partitionReferenceNum;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 udf_load_fileset(sb, bh, root);
Jan Kara3bf25cb2007-05-08 00:35:16 -0700772 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 return 0;
774 }
775 return 1;
776}
777
Jan Karac0eb31e2008-04-01 16:50:35 +0200778static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
780 struct primaryVolDesc *pvoldesc;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100781 struct ustr *instr, *outstr;
Jan Karac0eb31e2008-04-01 16:50:35 +0200782 struct buffer_head *bh;
783 uint16_t ident;
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100784 int ret = 1;
785
786 instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
787 if (!instr)
788 return 1;
789
790 outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
791 if (!outstr)
792 goto out1;
Jan Karac0eb31e2008-04-01 16:50:35 +0200793
794 bh = udf_read_tagged(sb, block, block, &ident);
795 if (!bh)
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100796 goto out2;
797
Jan Karac0eb31e2008-04-01 16:50:35 +0200798 BUG_ON(ident != TAG_IDENT_PVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
800 pvoldesc = (struct primaryVolDesc *)bh->b_data;
801
Marcin Slusarz56774802008-02-10 11:25:31 +0100802 if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
803 pvoldesc->recordingDateAndTime)) {
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100804#ifdef UDFFS_DEBUG
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200805 struct timestamp *ts = &pvoldesc->recordingDateAndTime;
marcin.slusarz@gmail.comcbf56762008-02-27 22:50:14 +0100806 udf_debug("recording time %04u/%02u/%02u"
Marcin Slusarz3a71fc52008-02-08 04:20:28 -0800807 " %02u:%02u (%x)\n",
Marcin Slusarzaf15a292008-02-10 11:29:10 +0100808 le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
809 ts->minute, le16_to_cpu(ts->typeAndTimezone));
810#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 }
812
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100813 if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
814 if (udf_CS0toUTF8(outstr, instr)) {
815 strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
816 outstr->u_len > 31 ? 31 : outstr->u_len);
Marcin Slusarz4b111112008-02-08 04:20:36 -0800817 udf_debug("volIdent[] = '%s'\n",
818 UDF_SB(sb)->s_volume_ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100821 if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
822 if (udf_CS0toUTF8(outstr, instr))
823 udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
Jan Karac0eb31e2008-04-01 16:50:35 +0200824
825 brelse(bh);
Marcin Slusarzba9aadd2008-11-16 19:01:44 +0100826 ret = 0;
827out2:
828 kfree(outstr);
829out1:
830 kfree(instr);
831 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832}
833
Jan Karabfb257a2008-04-08 20:37:21 +0200834static int udf_load_metadata_files(struct super_block *sb, int partition)
835{
836 struct udf_sb_info *sbi = UDF_SB(sb);
837 struct udf_part_map *map;
838 struct udf_meta_data *mdata;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200839 struct kernel_lb_addr addr;
Jan Karabfb257a2008-04-08 20:37:21 +0200840 int fe_error = 0;
841
842 map = &sbi->s_partmaps[partition];
843 mdata = &map->s_type_specific.s_metadata;
844
845 /* metadata address */
846 addr.logicalBlockNum = mdata->s_meta_file_loc;
847 addr.partitionReferenceNum = map->s_partition_num;
848
849 udf_debug("Metadata file location: block = %d part = %d\n",
850 addr.logicalBlockNum, addr.partitionReferenceNum);
851
Pekka Enberg97e961f2008-10-15 12:29:03 +0200852 mdata->s_metadata_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200853
854 if (mdata->s_metadata_fe == NULL) {
855 udf_warning(sb, __func__, "metadata inode efe not found, "
856 "will try mirror inode.");
857 fe_error = 1;
858 } else if (UDF_I(mdata->s_metadata_fe)->i_alloc_type !=
859 ICBTAG_FLAG_AD_SHORT) {
860 udf_warning(sb, __func__, "metadata inode efe does not have "
861 "short allocation descriptors!");
862 fe_error = 1;
863 iput(mdata->s_metadata_fe);
864 mdata->s_metadata_fe = NULL;
865 }
866
867 /* mirror file entry */
868 addr.logicalBlockNum = mdata->s_mirror_file_loc;
869 addr.partitionReferenceNum = map->s_partition_num;
870
871 udf_debug("Mirror metadata file location: block = %d part = %d\n",
872 addr.logicalBlockNum, addr.partitionReferenceNum);
873
Pekka Enberg97e961f2008-10-15 12:29:03 +0200874 mdata->s_mirror_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200875
876 if (mdata->s_mirror_fe == NULL) {
877 if (fe_error) {
878 udf_error(sb, __func__, "mirror inode efe not found "
879 "and metadata inode is missing too, exiting...");
880 goto error_exit;
881 } else
882 udf_warning(sb, __func__, "mirror inode efe not found,"
883 " but metadata inode is OK");
884 } else if (UDF_I(mdata->s_mirror_fe)->i_alloc_type !=
885 ICBTAG_FLAG_AD_SHORT) {
886 udf_warning(sb, __func__, "mirror inode efe does not have "
887 "short allocation descriptors!");
888 iput(mdata->s_mirror_fe);
889 mdata->s_mirror_fe = NULL;
890 if (fe_error)
891 goto error_exit;
892 }
893
894 /*
895 * bitmap file entry
896 * Note:
897 * Load only if bitmap file location differs from 0xFFFFFFFF (DCN-5102)
898 */
899 if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
900 addr.logicalBlockNum = mdata->s_bitmap_file_loc;
901 addr.partitionReferenceNum = map->s_partition_num;
902
903 udf_debug("Bitmap file location: block = %d part = %d\n",
904 addr.logicalBlockNum, addr.partitionReferenceNum);
905
Pekka Enberg97e961f2008-10-15 12:29:03 +0200906 mdata->s_bitmap_fe = udf_iget(sb, &addr);
Jan Karabfb257a2008-04-08 20:37:21 +0200907
908 if (mdata->s_bitmap_fe == NULL) {
909 if (sb->s_flags & MS_RDONLY)
910 udf_warning(sb, __func__, "bitmap inode efe "
911 "not found but it's ok since the disc"
912 " is mounted read-only");
913 else {
914 udf_error(sb, __func__, "bitmap inode efe not "
915 "found and attempted read-write mount");
916 goto error_exit;
917 }
918 }
919 }
920
921 udf_debug("udf_load_metadata_files Ok\n");
922
923 return 0;
924
925error_exit:
926 return 1;
927}
928
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700929static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +0200930 struct kernel_lb_addr *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931{
932 struct fileSetDesc *fset;
933
934 fset = (struct fileSetDesc *)bh->b_data;
935
936 *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
937
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800938 UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700940 udf_debug("Rootdir at block=%d, partition=%d\n",
941 root->logicalBlockNum, root->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942}
943
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800944int udf_compute_nr_groups(struct super_block *sb, u32 partition)
945{
946 struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
Julia Lawall8dee00b2008-02-14 16:15:45 +0100947 return DIV_ROUND_UP(map->s_partition_len +
948 (sizeof(struct spaceBitmapDesc) << 3),
949 sb->s_blocksize * 8);
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800950}
951
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800952static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
953{
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800954 struct udf_bitmap *bitmap;
955 int nr_groups;
956 int size;
957
Marcin Slusarz883cb9d2008-02-08 04:20:34 -0800958 nr_groups = udf_compute_nr_groups(sb, index);
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800959 size = sizeof(struct udf_bitmap) +
960 (sizeof(struct buffer_head *) * nr_groups);
961
962 if (size <= PAGE_SIZE)
963 bitmap = kmalloc(size, GFP_KERNEL);
964 else
965 bitmap = vmalloc(size); /* TODO: get rid of vmalloc */
966
967 if (bitmap == NULL) {
Harvey Harrison8e24eea2008-04-30 00:55:09 -0700968 udf_error(sb, __func__,
Marcin Slusarz66e1da32008-02-08 04:20:33 -0800969 "Unable to allocate space for bitmap "
970 "and %d buffer_head pointers", nr_groups);
971 return NULL;
972 }
973
974 memset(bitmap, 0x00, size);
975 bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
976 bitmap->s_nr_groups = nr_groups;
977 return bitmap;
978}
979
Jan Kara3fb38df2008-04-02 12:26:36 +0200980static int udf_fill_partdesc_info(struct super_block *sb,
981 struct partitionDesc *p, int p_index)
982{
983 struct udf_part_map *map;
984 struct udf_sb_info *sbi = UDF_SB(sb);
985 struct partitionHeaderDesc *phd;
986
987 map = &sbi->s_partmaps[p_index];
988
989 map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
990 map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
991
992 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
993 map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
994 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
995 map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
996 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
997 map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
998 if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
999 map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
1000
Sebastian Manciulea706047a2008-04-14 17:13:01 +02001001 udf_debug("Partition (%d type %x) starts at physical %d, "
1002 "block length %d\n", p_index,
Jan Kara3fb38df2008-04-02 12:26:36 +02001003 map->s_partition_type, map->s_partition_root,
1004 map->s_partition_len);
1005
1006 if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
1007 strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
1008 return 0;
1009
1010 phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
1011 if (phd->unallocSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001012 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001013 .logicalBlockNum = le32_to_cpu(
1014 phd->unallocSpaceTable.extPosition),
1015 .partitionReferenceNum = p_index,
1016 };
1017
Pekka Enberg97e961f2008-10-15 12:29:03 +02001018 map->s_uspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001019 if (!map->s_uspace.s_table) {
1020 udf_debug("cannot load unallocSpaceTable (part %d)\n",
1021 p_index);
1022 return 1;
1023 }
1024 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
1025 udf_debug("unallocSpaceTable (part %d) @ %ld\n",
1026 p_index, map->s_uspace.s_table->i_ino);
1027 }
1028
1029 if (phd->unallocSpaceBitmap.extLength) {
1030 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1031 if (!bitmap)
1032 return 1;
1033 map->s_uspace.s_bitmap = bitmap;
1034 bitmap->s_extLength = le32_to_cpu(
1035 phd->unallocSpaceBitmap.extLength);
1036 bitmap->s_extPosition = le32_to_cpu(
1037 phd->unallocSpaceBitmap.extPosition);
1038 map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
1039 udf_debug("unallocSpaceBitmap (part %d) @ %d\n", p_index,
1040 bitmap->s_extPosition);
1041 }
1042
1043 if (phd->partitionIntegrityTable.extLength)
1044 udf_debug("partitionIntegrityTable (part %d)\n", p_index);
1045
1046 if (phd->freedSpaceTable.extLength) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001047 struct kernel_lb_addr loc = {
Jan Kara3fb38df2008-04-02 12:26:36 +02001048 .logicalBlockNum = le32_to_cpu(
1049 phd->freedSpaceTable.extPosition),
1050 .partitionReferenceNum = p_index,
1051 };
1052
Pekka Enberg97e961f2008-10-15 12:29:03 +02001053 map->s_fspace.s_table = udf_iget(sb, &loc);
Jan Kara3fb38df2008-04-02 12:26:36 +02001054 if (!map->s_fspace.s_table) {
1055 udf_debug("cannot load freedSpaceTable (part %d)\n",
1056 p_index);
1057 return 1;
1058 }
1059
1060 map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
1061 udf_debug("freedSpaceTable (part %d) @ %ld\n",
1062 p_index, map->s_fspace.s_table->i_ino);
1063 }
1064
1065 if (phd->freedSpaceBitmap.extLength) {
1066 struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
1067 if (!bitmap)
1068 return 1;
1069 map->s_fspace.s_bitmap = bitmap;
1070 bitmap->s_extLength = le32_to_cpu(
1071 phd->freedSpaceBitmap.extLength);
1072 bitmap->s_extPosition = le32_to_cpu(
1073 phd->freedSpaceBitmap.extPosition);
1074 map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
1075 udf_debug("freedSpaceBitmap (part %d) @ %d\n", p_index,
1076 bitmap->s_extPosition);
1077 }
1078 return 0;
1079}
1080
Jan Karae971b0b2009-11-30 19:47:55 +01001081static void udf_find_vat_block(struct super_block *sb, int p_index,
1082 int type1_index, sector_t start_block)
1083{
1084 struct udf_sb_info *sbi = UDF_SB(sb);
1085 struct udf_part_map *map = &sbi->s_partmaps[p_index];
1086 sector_t vat_block;
1087 struct kernel_lb_addr ino;
1088
1089 /*
1090 * VAT file entry is in the last recorded block. Some broken disks have
1091 * it a few blocks before so try a bit harder...
1092 */
1093 ino.partitionReferenceNum = type1_index;
1094 for (vat_block = start_block;
1095 vat_block >= map->s_partition_root &&
1096 vat_block >= start_block - 3 &&
1097 !sbi->s_vat_inode; vat_block--) {
1098 ino.logicalBlockNum = vat_block - map->s_partition_root;
1099 sbi->s_vat_inode = udf_iget(sb, &ino);
1100 }
1101}
1102
Jan Kara38b74a52008-04-02 16:01:35 +02001103static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
1104{
1105 struct udf_sb_info *sbi = UDF_SB(sb);
1106 struct udf_part_map *map = &sbi->s_partmaps[p_index];
Jan Karafa5e0812008-04-08 02:08:53 +02001107 struct buffer_head *bh = NULL;
1108 struct udf_inode_info *vati;
1109 uint32_t pos;
1110 struct virtualAllocationTable20 *vat20;
Jan Kara4bf17af2009-07-14 19:30:23 +02001111 sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
Jan Kara38b74a52008-04-02 16:01:35 +02001112
Jan Karae971b0b2009-11-30 19:47:55 +01001113 udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
Jan Kara4bf17af2009-07-14 19:30:23 +02001114 if (!sbi->s_vat_inode &&
1115 sbi->s_last_block != blocks - 1) {
1116 printk(KERN_NOTICE "UDF-fs: Failed to read VAT inode from the"
1117 " last recorded block (%lu), retrying with the last "
1118 "block of the device (%lu).\n",
1119 (unsigned long)sbi->s_last_block,
1120 (unsigned long)blocks - 1);
Jan Karae971b0b2009-11-30 19:47:55 +01001121 udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
Jan Kara4bf17af2009-07-14 19:30:23 +02001122 }
Jan Kara38b74a52008-04-02 16:01:35 +02001123 if (!sbi->s_vat_inode)
1124 return 1;
1125
1126 if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001127 map->s_type_specific.s_virtual.s_start_offset = 0;
Jan Kara38b74a52008-04-02 16:01:35 +02001128 map->s_type_specific.s_virtual.s_num_entries =
1129 (sbi->s_vat_inode->i_size - 36) >> 2;
1130 } else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
Jan Karafa5e0812008-04-08 02:08:53 +02001131 vati = UDF_I(sbi->s_vat_inode);
1132 if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
1133 pos = udf_block_map(sbi->s_vat_inode, 0);
1134 bh = sb_bread(sb, pos);
1135 if (!bh)
1136 return 1;
1137 vat20 = (struct virtualAllocationTable20 *)bh->b_data;
1138 } else {
1139 vat20 = (struct virtualAllocationTable20 *)
1140 vati->i_ext.i_data;
1141 }
Jan Kara38b74a52008-04-02 16:01:35 +02001142
Jan Kara38b74a52008-04-02 16:01:35 +02001143 map->s_type_specific.s_virtual.s_start_offset =
Sebastian Manciulea47c93582008-04-14 17:06:36 +02001144 le16_to_cpu(vat20->lengthHeader);
Jan Kara38b74a52008-04-02 16:01:35 +02001145 map->s_type_specific.s_virtual.s_num_entries =
1146 (sbi->s_vat_inode->i_size -
1147 map->s_type_specific.s_virtual.
1148 s_start_offset) >> 2;
1149 brelse(bh);
1150 }
1151 return 0;
1152}
1153
Jan Karac0eb31e2008-04-01 16:50:35 +02001154static int udf_load_partdesc(struct super_block *sb, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155{
Jan Karac0eb31e2008-04-01 16:50:35 +02001156 struct buffer_head *bh;
Jan Karac0eb31e2008-04-01 16:50:35 +02001157 struct partitionDesc *p;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001158 struct udf_part_map *map;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001159 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara38b74a52008-04-02 16:01:35 +02001160 int i, type1_idx;
Jan Karac0eb31e2008-04-01 16:50:35 +02001161 uint16_t partitionNumber;
1162 uint16_t ident;
1163 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164
Jan Karac0eb31e2008-04-01 16:50:35 +02001165 bh = udf_read_tagged(sb, block, block, &ident);
1166 if (!bh)
1167 return 1;
1168 if (ident != TAG_IDENT_PD)
1169 goto out_bh;
1170
1171 p = (struct partitionDesc *)bh->b_data;
1172 partitionNumber = le16_to_cpu(p->partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001173
Jan Karabfb257a2008-04-08 20:37:21 +02001174 /* First scan for TYPE1, SPARABLE and METADATA partitions */
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001175 for (i = 0; i < sbi->s_partitions; i++) {
1176 map = &sbi->s_partmaps[i];
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001177 udf_debug("Searching map: (%d == %d)\n",
Marcin Slusarz165923f2008-02-10 11:33:08 +01001178 map->s_partition_num, partitionNumber);
Jan Kara38b74a52008-04-02 16:01:35 +02001179 if (map->s_partition_num == partitionNumber &&
1180 (map->s_partition_type == UDF_TYPE1_MAP15 ||
1181 map->s_partition_type == UDF_SPARABLE_MAP15))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 break;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001183 }
1184
Jan Kara38b74a52008-04-02 16:01:35 +02001185 if (i >= sbi->s_partitions) {
Marcin Slusarz165923f2008-02-10 11:33:08 +01001186 udf_debug("Partition (%d) not found in partition map\n",
1187 partitionNumber);
Jan Karac0eb31e2008-04-01 16:50:35 +02001188 goto out_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001189 }
1190
Jan Kara3fb38df2008-04-02 12:26:36 +02001191 ret = udf_fill_partdesc_info(sb, p, i);
Jan Kara38b74a52008-04-02 16:01:35 +02001192
1193 /*
Jan Karabfb257a2008-04-08 20:37:21 +02001194 * Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
1195 * PHYSICAL partitions are already set up
Jan Kara38b74a52008-04-02 16:01:35 +02001196 */
1197 type1_idx = i;
1198 for (i = 0; i < sbi->s_partitions; i++) {
1199 map = &sbi->s_partmaps[i];
1200
1201 if (map->s_partition_num == partitionNumber &&
1202 (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
Jan Karabfb257a2008-04-08 20:37:21 +02001203 map->s_partition_type == UDF_VIRTUAL_MAP20 ||
1204 map->s_partition_type == UDF_METADATA_MAP25))
Jan Kara38b74a52008-04-02 16:01:35 +02001205 break;
1206 }
1207
1208 if (i >= sbi->s_partitions)
1209 goto out_bh;
1210
1211 ret = udf_fill_partdesc_info(sb, p, i);
1212 if (ret)
1213 goto out_bh;
1214
Jan Karabfb257a2008-04-08 20:37:21 +02001215 if (map->s_partition_type == UDF_METADATA_MAP25) {
1216 ret = udf_load_metadata_files(sb, i);
1217 if (ret) {
1218 printk(KERN_ERR "UDF-fs: error loading MetaData "
1219 "partition map %d\n", i);
1220 goto out_bh;
1221 }
1222 } else {
1223 ret = udf_load_vat(sb, i, type1_idx);
1224 if (ret)
1225 goto out_bh;
1226 /*
1227 * Mark filesystem read-only if we have a partition with
1228 * virtual map since we don't handle writing to it (we
1229 * overwrite blocks instead of relocating them).
1230 */
1231 sb->s_flags |= MS_RDONLY;
1232 printk(KERN_NOTICE "UDF-fs: Filesystem marked read-only "
1233 "because writing to pseudooverwrite partition is "
1234 "not implemented.\n");
1235 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001236out_bh:
Jan Kara2e0838f2008-04-01 18:08:51 +02001237 /* In case loading failed, we handle cleanup in udf_fill_super */
Jan Karac0eb31e2008-04-01 16:50:35 +02001238 brelse(bh);
1239 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240}
1241
Jan Karac0eb31e2008-04-01 16:50:35 +02001242static int udf_load_logicalvol(struct super_block *sb, sector_t block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001243 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244{
1245 struct logicalVolDesc *lvd;
1246 int i, j, offset;
1247 uint8_t type;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001248 struct udf_sb_info *sbi = UDF_SB(sb);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001249 struct genericPartitionMap *gpm;
Jan Karac0eb31e2008-04-01 16:50:35 +02001250 uint16_t ident;
1251 struct buffer_head *bh;
1252 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253
Jan Karac0eb31e2008-04-01 16:50:35 +02001254 bh = udf_read_tagged(sb, block, block, &ident);
1255 if (!bh)
1256 return 1;
1257 BUG_ON(ident != TAG_IDENT_LVD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 lvd = (struct logicalVolDesc *)bh->b_data;
1259
Marcin Slusarzdc5d39b2008-02-08 04:20:32 -08001260 i = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
Jan Karac0eb31e2008-04-01 16:50:35 +02001261 if (i != 0) {
1262 ret = i;
1263 goto out_bh;
1264 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001266 for (i = 0, offset = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001267 i < sbi->s_partitions && offset < le32_to_cpu(lvd->mapTableLength);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001268 i++, offset += gpm->partitionMapLength) {
1269 struct udf_part_map *map = &sbi->s_partmaps[i];
1270 gpm = (struct genericPartitionMap *)
1271 &(lvd->partitionMaps[offset]);
1272 type = gpm->partitionMapType;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001273 if (type == 1) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001274 struct genericPartitionMap1 *gpm1 =
1275 (struct genericPartitionMap1 *)gpm;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001276 map->s_partition_type = UDF_TYPE1_MAP15;
1277 map->s_volumeseqnum = le16_to_cpu(gpm1->volSeqNum);
1278 map->s_partition_num = le16_to_cpu(gpm1->partitionNum);
1279 map->s_partition_func = NULL;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001280 } else if (type == 2) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001281 struct udfPartitionMap2 *upm2 =
1282 (struct udfPartitionMap2 *)gpm;
1283 if (!strncmp(upm2->partIdent.ident, UDF_ID_VIRTUAL,
1284 strlen(UDF_ID_VIRTUAL))) {
1285 u16 suf =
1286 le16_to_cpu(((__le16 *)upm2->partIdent.
1287 identSuffix)[0]);
Jan Karac82a1272008-04-08 01:16:32 +02001288 if (suf < 0x0200) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001289 map->s_partition_type =
1290 UDF_VIRTUAL_MAP15;
1291 map->s_partition_func =
1292 udf_get_pblock_virt15;
Jan Karac82a1272008-04-08 01:16:32 +02001293 } else {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001294 map->s_partition_type =
1295 UDF_VIRTUAL_MAP20;
1296 map->s_partition_func =
1297 udf_get_pblock_virt20;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 }
Marcin Slusarz4b111112008-02-08 04:20:36 -08001299 } else if (!strncmp(upm2->partIdent.ident,
1300 UDF_ID_SPARABLE,
1301 strlen(UDF_ID_SPARABLE))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 uint32_t loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 struct sparingTable *st;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001304 struct sparablePartitionMap *spm =
1305 (struct sparablePartitionMap *)gpm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001307 map->s_partition_type = UDF_SPARABLE_MAP15;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001308 map->s_type_specific.s_sparing.s_packet_len =
1309 le16_to_cpu(spm->packetLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001310 for (j = 0; j < spm->numSparingTables; j++) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001311 struct buffer_head *bh2;
1312
1313 loc = le32_to_cpu(
1314 spm->locSparingTable[j]);
1315 bh2 = udf_read_tagged(sb, loc, loc,
1316 &ident);
1317 map->s_type_specific.s_sparing.
1318 s_spar_map[j] = bh2;
1319
Marcin Slusarz165923f2008-02-10 11:33:08 +01001320 if (bh2 == NULL)
1321 continue;
1322
1323 st = (struct sparingTable *)bh2->b_data;
1324 if (ident != 0 || strncmp(
1325 st->sparingIdent.ident,
1326 UDF_ID_SPARING,
1327 strlen(UDF_ID_SPARING))) {
1328 brelse(bh2);
1329 map->s_type_specific.s_sparing.
1330 s_spar_map[j] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 }
1332 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001333 map->s_partition_func = udf_get_pblock_spar15;
Jan Karabfb257a2008-04-08 20:37:21 +02001334 } else if (!strncmp(upm2->partIdent.ident,
1335 UDF_ID_METADATA,
1336 strlen(UDF_ID_METADATA))) {
1337 struct udf_meta_data *mdata =
1338 &map->s_type_specific.s_metadata;
1339 struct metadataPartitionMap *mdm =
1340 (struct metadataPartitionMap *)
1341 &(lvd->partitionMaps[offset]);
1342 udf_debug("Parsing Logical vol part %d "
1343 "type %d id=%s\n", i, type,
1344 UDF_ID_METADATA);
1345
1346 map->s_partition_type = UDF_METADATA_MAP25;
1347 map->s_partition_func = udf_get_pblock_meta25;
1348
1349 mdata->s_meta_file_loc =
1350 le32_to_cpu(mdm->metadataFileLoc);
1351 mdata->s_mirror_file_loc =
1352 le32_to_cpu(mdm->metadataMirrorFileLoc);
1353 mdata->s_bitmap_file_loc =
1354 le32_to_cpu(mdm->metadataBitmapFileLoc);
1355 mdata->s_alloc_unit_size =
1356 le32_to_cpu(mdm->allocUnitSize);
1357 mdata->s_align_unit_size =
1358 le16_to_cpu(mdm->alignUnitSize);
1359 mdata->s_dup_md_flag =
1360 mdm->flags & 0x01;
1361
1362 udf_debug("Metadata Ident suffix=0x%x\n",
1363 (le16_to_cpu(
1364 ((__le16 *)
1365 mdm->partIdent.identSuffix)[0])));
1366 udf_debug("Metadata part num=%d\n",
1367 le16_to_cpu(mdm->partitionNum));
1368 udf_debug("Metadata part alloc unit size=%d\n",
1369 le32_to_cpu(mdm->allocUnitSize));
1370 udf_debug("Metadata file loc=%d\n",
1371 le32_to_cpu(mdm->metadataFileLoc));
1372 udf_debug("Mirror file loc=%d\n",
1373 le32_to_cpu(mdm->metadataMirrorFileLoc));
1374 udf_debug("Bitmap file loc=%d\n",
1375 le32_to_cpu(mdm->metadataBitmapFileLoc));
1376 udf_debug("Duplicate Flag: %d %d\n",
1377 mdata->s_dup_md_flag, mdm->flags);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001378 } else {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001379 udf_debug("Unknown ident: %s\n",
1380 upm2->partIdent.ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 continue;
1382 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001383 map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
1384 map->s_partition_num = le16_to_cpu(upm2->partitionNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 }
1386 udf_debug("Partition (%d:%d) type %d on volume %d\n",
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001387 i, map->s_partition_num, type,
1388 map->s_volumeseqnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 }
1390
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001391 if (fileset) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001392 struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393
1394 *fileset = lelb_to_cpu(la->extLocation);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001395 udf_debug("FileSet found in LogicalVolDesc at block=%d, "
1396 "partition=%d\n", fileset->logicalBlockNum,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001397 fileset->partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398 }
1399 if (lvd->integritySeqExt.extLength)
1400 udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001401
Jan Karac0eb31e2008-04-01 16:50:35 +02001402out_bh:
1403 brelse(bh);
1404 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405}
1406
1407/*
1408 * udf_load_logicalvolint
1409 *
1410 */
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001411static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412{
1413 struct buffer_head *bh = NULL;
1414 uint16_t ident;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001415 struct udf_sb_info *sbi = UDF_SB(sb);
1416 struct logicalVolIntegrityDesc *lvid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417
1418 while (loc.extLength > 0 &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001419 (bh = udf_read_tagged(sb, loc.extLocation,
1420 loc.extLocation, &ident)) &&
1421 ident == TAG_IDENT_LVID) {
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001422 sbi->s_lvid_bh = bh;
1423 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001424
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001425 if (lvid->nextIntegrityExt.extLength)
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001426 udf_load_logicalvolint(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001427 leea_to_cpu(lvid->nextIntegrityExt));
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001428
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001429 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001430 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 loc.extLength -= sb->s_blocksize;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001432 loc.extLocation++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001434 if (sbi->s_lvid_bh != bh)
Jan Kara3bf25cb2007-05-08 00:35:16 -07001435 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436}
1437
1438/*
1439 * udf_process_sequence
1440 *
1441 * PURPOSE
1442 * Process a main/reserve volume descriptor sequence.
1443 *
1444 * PRE-CONDITIONS
1445 * sb Pointer to _locked_ superblock.
1446 * block First block of first extent of the sequence.
1447 * lastblock Lastblock of first extent of the sequence.
1448 *
1449 * HISTORY
1450 * July 1, 1997 - Andrew E. Mileski
1451 * Written, tested, and released.
1452 */
Jan Kara200a3592008-03-04 13:03:09 +01001453static noinline int udf_process_sequence(struct super_block *sb, long block,
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001454 long lastblock, struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455{
1456 struct buffer_head *bh = NULL;
1457 struct udf_vds_record vds[VDS_POS_LENGTH];
Marcin Slusarz4b111112008-02-08 04:20:36 -08001458 struct udf_vds_record *curr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 struct generic_desc *gd;
1460 struct volDescPtr *vdp;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001461 int done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 uint32_t vdsn;
1463 uint16_t ident;
1464 long next_s = 0, next_e = 0;
1465
1466 memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
1467
Jan Karac0eb31e2008-04-01 16:50:35 +02001468 /*
1469 * Read the main descriptor sequence and find which descriptors
1470 * are in it.
1471 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001472 for (; (!done && block <= lastblock); block++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473
1474 bh = udf_read_tagged(sb, block, block, &ident);
Jan Karac0eb31e2008-04-01 16:50:35 +02001475 if (!bh) {
1476 printk(KERN_ERR "udf: Block %Lu of volume descriptor "
1477 "sequence is corrupted or we could not read "
1478 "it.\n", (unsigned long long)block);
1479 return 1;
1480 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481
1482 /* Process each descriptor (ISO 13346 3/8.3-8.4) */
1483 gd = (struct generic_desc *)bh->b_data;
1484 vdsn = le32_to_cpu(gd->volDescSeqNum);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001485 switch (ident) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001486 case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001487 curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
1488 if (vdsn >= curr->volDescSeqNum) {
1489 curr->volDescSeqNum = vdsn;
1490 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001491 }
1492 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001493 case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001494 curr = &vds[VDS_POS_VOL_DESC_PTR];
1495 if (vdsn >= curr->volDescSeqNum) {
1496 curr->volDescSeqNum = vdsn;
1497 curr->block = block;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001499 vdp = (struct volDescPtr *)bh->b_data;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001500 next_s = le32_to_cpu(
1501 vdp->nextVolDescSeqExt.extLocation);
1502 next_e = le32_to_cpu(
1503 vdp->nextVolDescSeqExt.extLength);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001504 next_e = next_e >> sb->s_blocksize_bits;
1505 next_e += next_s;
1506 }
1507 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001508 case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001509 curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
1510 if (vdsn >= curr->volDescSeqNum) {
1511 curr->volDescSeqNum = vdsn;
1512 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001513 }
1514 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001515 case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001516 curr = &vds[VDS_POS_PARTITION_DESC];
1517 if (!curr->block)
1518 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001519 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001520 case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001521 curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
1522 if (vdsn >= curr->volDescSeqNum) {
1523 curr->volDescSeqNum = vdsn;
1524 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001525 }
1526 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001527 case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
Marcin Slusarz4b111112008-02-08 04:20:36 -08001528 curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
1529 if (vdsn >= curr->volDescSeqNum) {
1530 curr->volDescSeqNum = vdsn;
1531 curr->block = block;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001532 }
1533 break;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001534 case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001535 vds[VDS_POS_TERMINATING_DESC].block = block;
1536 if (next_e) {
1537 block = next_s;
1538 lastblock = next_e;
1539 next_s = next_e = 0;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001540 } else
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001541 done = 1;
1542 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07001544 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 }
Jan Karac0eb31e2008-04-01 16:50:35 +02001546 /*
1547 * Now read interesting descriptors again and process them
1548 * in a suitable order
1549 */
1550 if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
1551 printk(KERN_ERR "udf: Primary Volume Descriptor not found!\n");
1552 return 1;
1553 }
1554 if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
1555 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
Jan Karac0eb31e2008-04-01 16:50:35 +02001557 if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
1558 vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
1559 return 1;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001560
Jan Karac0eb31e2008-04-01 16:50:35 +02001561 if (vds[VDS_POS_PARTITION_DESC].block) {
1562 /*
1563 * We rescan the whole descriptor sequence to find
1564 * partition descriptor blocks and process them.
1565 */
1566 for (block = vds[VDS_POS_PARTITION_DESC].block;
1567 block < vds[VDS_POS_TERMINATING_DESC].block;
1568 block++)
1569 if (udf_load_partdesc(sb, block))
Marcin Slusarz165923f2008-02-10 11:33:08 +01001570 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 }
1572
1573 return 0;
1574}
1575
Jan Kara40346002009-03-19 16:21:38 +01001576static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
1577 struct kernel_lb_addr *fileset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578{
Jan Kara40346002009-03-19 16:21:38 +01001579 struct anchorVolDescPtr *anchor;
1580 long main_s, main_e, reserve_s, reserve_e;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581
Jan Kara40346002009-03-19 16:21:38 +01001582 anchor = (struct anchorVolDescPtr *)bh->b_data;
1583
1584 /* Locate the main sequence */
1585 main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
1586 main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
1587 main_e = main_e >> sb->s_blocksize_bits;
1588 main_e += main_s;
1589
1590 /* Locate the reserve sequence */
1591 reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
1592 reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
1593 reserve_e = reserve_e >> sb->s_blocksize_bits;
1594 reserve_e += reserve_s;
1595
1596 /* Process the main & reserve sequences */
1597 /* responsible for finding the PartitionDesc(s) */
1598 if (!udf_process_sequence(sb, main_s, main_e, fileset))
1599 return 1;
1600 return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601}
1602
Jan Kara40346002009-03-19 16:21:38 +01001603/*
1604 * Check whether there is an anchor block in the given block and
1605 * load Volume Descriptor Sequence if so.
1606 */
1607static int udf_check_anchor_block(struct super_block *sb, sector_t block,
1608 struct kernel_lb_addr *fileset)
1609{
1610 struct buffer_head *bh;
1611 uint16_t ident;
1612 int ret;
1613
1614 if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
1615 udf_fixed_to_variable(block) >=
1616 sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
1617 return 0;
1618
1619 bh = udf_read_tagged(sb, block, block, &ident);
1620 if (!bh)
1621 return 0;
1622 if (ident != TAG_IDENT_AVDP) {
1623 brelse(bh);
1624 return 0;
1625 }
1626 ret = udf_load_sequence(sb, bh, fileset);
1627 brelse(bh);
1628 return ret;
1629}
1630
1631/* Search for an anchor volume descriptor pointer */
1632static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
1633 struct kernel_lb_addr *fileset)
1634{
1635 sector_t last[6];
1636 int i;
1637 struct udf_sb_info *sbi = UDF_SB(sb);
1638 int last_count = 0;
1639
1640 /* First try user provided anchor */
1641 if (sbi->s_anchor) {
1642 if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
1643 return lastblock;
1644 }
1645 /*
1646 * according to spec, anchor is in either:
1647 * block 256
1648 * lastblock-256
1649 * lastblock
1650 * however, if the disc isn't closed, it could be 512.
1651 */
1652 if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
1653 return lastblock;
1654 /*
1655 * The trouble is which block is the last one. Drives often misreport
1656 * this so we try various possibilities.
1657 */
1658 last[last_count++] = lastblock;
1659 if (lastblock >= 1)
1660 last[last_count++] = lastblock - 1;
1661 last[last_count++] = lastblock + 1;
1662 if (lastblock >= 2)
1663 last[last_count++] = lastblock - 2;
1664 if (lastblock >= 150)
1665 last[last_count++] = lastblock - 150;
1666 if (lastblock >= 152)
1667 last[last_count++] = lastblock - 152;
1668
1669 for (i = 0; i < last_count; i++) {
1670 if (last[i] >= sb->s_bdev->bd_inode->i_size >>
1671 sb->s_blocksize_bits)
1672 continue;
1673 if (udf_check_anchor_block(sb, last[i], fileset))
1674 return last[i];
1675 if (last[i] < 256)
1676 continue;
1677 if (udf_check_anchor_block(sb, last[i] - 256, fileset))
1678 return last[i];
1679 }
1680
1681 /* Finally try block 512 in case media is open */
1682 if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
1683 return last[0];
1684 return 0;
1685}
1686
1687/*
1688 * Find an anchor volume descriptor and load Volume Descriptor Sequence from
1689 * area specified by it. The function expects sbi->s_lastblock to be the last
1690 * block on the media.
1691 *
1692 * Return 1 if ok, 0 if not found.
1693 *
1694 */
1695static int udf_find_anchor(struct super_block *sb,
1696 struct kernel_lb_addr *fileset)
1697{
1698 sector_t lastblock;
1699 struct udf_sb_info *sbi = UDF_SB(sb);
1700
1701 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1702 if (lastblock)
1703 goto out;
1704
1705 /* No anchor found? Try VARCONV conversion of block numbers */
1706 UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
1707 /* Firstly, we try to not convert number of the last block */
1708 lastblock = udf_scan_anchors(sb,
1709 udf_variable_to_fixed(sbi->s_last_block),
1710 fileset);
1711 if (lastblock)
1712 goto out;
1713
1714 /* Secondly, we try with converted number of the last block */
1715 lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
1716 if (!lastblock) {
1717 /* VARCONV didn't help. Clear it. */
1718 UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
1719 return 0;
1720 }
1721out:
1722 sbi->s_last_block = lastblock;
1723 return 1;
1724}
1725
1726/*
1727 * Check Volume Structure Descriptor, find Anchor block and load Volume
1728 * Descriptor Sequence
1729 */
1730static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
1731 int silent, struct kernel_lb_addr *fileset)
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001732{
1733 struct udf_sb_info *sbi = UDF_SB(sb);
Jan Kara40346002009-03-19 16:21:38 +01001734 loff_t nsr_off;
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001735
1736 if (!sb_set_blocksize(sb, uopt->blocksize)) {
1737 if (!silent)
1738 printk(KERN_WARNING "UDF-fs: Bad block size\n");
1739 return 0;
1740 }
1741 sbi->s_last_block = uopt->lastblock;
Jan Kara40346002009-03-19 16:21:38 +01001742 if (!uopt->novrs) {
1743 /* Check that it is NSR02 compliant */
1744 nsr_off = udf_check_vsd(sb);
1745 if (!nsr_off) {
1746 if (!silent)
1747 printk(KERN_WARNING "UDF-fs: No VRS found\n");
1748 return 0;
1749 }
1750 if (nsr_off == -1)
1751 udf_debug("Failed to read byte 32768. Assuming open "
1752 "disc. Skipping validity check\n");
1753 if (!sbi->s_last_block)
1754 sbi->s_last_block = udf_get_last_block(sb);
1755 } else {
1756 udf_debug("Validity check skipped because of novrs option\n");
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001757 }
Jan Kara40346002009-03-19 16:21:38 +01001758
1759 /* Look for anchor block and load Volume Descriptor Sequence */
1760 sbi->s_anchor = uopt->anchor;
1761 if (!udf_find_anchor(sb, fileset)) {
Clemens Ladisch1197e4d2009-03-11 15:57:47 +01001762 if (!silent)
1763 printk(KERN_WARNING "UDF-fs: No anchor found\n");
1764 return 0;
1765 }
1766 return 1;
1767}
1768
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769static void udf_open_lvid(struct super_block *sb)
1770{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001771 struct udf_sb_info *sbi = UDF_SB(sb);
1772 struct buffer_head *bh = sbi->s_lvid_bh;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001773 struct logicalVolIntegrityDesc *lvid;
1774 struct logicalVolIntegrityDescImpUse *lvidiu;
Jan Kara146bca72009-03-16 18:27:37 +01001775
Marcin Slusarz165923f2008-02-10 11:33:08 +01001776 if (!bh)
1777 return;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001778 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
1779 lvidiu = udf_sb_lvidiu(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780
Marcin Slusarz165923f2008-02-10 11:33:08 +01001781 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1782 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1783 udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
1784 CURRENT_TIME);
Jan Kara146bca72009-03-16 18:27:37 +01001785 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786
Marcin Slusarz165923f2008-02-10 11:33:08 +01001787 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001788 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001789 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001790
1791 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1792 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001793 sbi->s_lvid_dirty = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794}
1795
1796static void udf_close_lvid(struct super_block *sb)
1797{
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001798 struct udf_sb_info *sbi = UDF_SB(sb);
1799 struct buffer_head *bh = sbi->s_lvid_bh;
1800 struct logicalVolIntegrityDesc *lvid;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001801 struct logicalVolIntegrityDescImpUse *lvidiu;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001802
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001803 if (!bh)
1804 return;
1805
1806 lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
Marcin Slusarz165923f2008-02-10 11:33:08 +01001807 lvidiu = udf_sb_lvidiu(sbi);
1808 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
1809 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
1810 udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
1811 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
1812 lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
1813 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
1814 lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
1815 if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
1816 lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
1817 lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818
Marcin Slusarz165923f2008-02-10 11:33:08 +01001819 lvid->descTag.descCRC = cpu_to_le16(
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001820 crc_itu_t(0, (char *)lvid + sizeof(struct tag),
Bob Copelandf845fce2008-04-17 09:47:48 +02001821 le16_to_cpu(lvid->descTag.descCRCLength)));
Marcin Slusarz165923f2008-02-10 11:33:08 +01001822
1823 lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
1824 mark_buffer_dirty(bh);
Jan Kara146bca72009-03-16 18:27:37 +01001825 sbi->s_lvid_dirty = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826}
1827
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001828static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
1829{
1830 int i;
1831 int nr_groups = bitmap->s_nr_groups;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001832 int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
1833 nr_groups);
Marcin Slusarz66e1da32008-02-08 04:20:33 -08001834
1835 for (i = 0; i < nr_groups; i++)
1836 if (bitmap->s_block_bitmap[i])
1837 brelse(bitmap->s_block_bitmap[i]);
1838
1839 if (size <= PAGE_SIZE)
1840 kfree(bitmap);
1841 else
1842 vfree(bitmap);
1843}
1844
Jan Kara2e0838f2008-04-01 18:08:51 +02001845static void udf_free_partition(struct udf_part_map *map)
1846{
1847 int i;
Jan Karabfb257a2008-04-08 20:37:21 +02001848 struct udf_meta_data *mdata;
Jan Kara2e0838f2008-04-01 18:08:51 +02001849
1850 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
1851 iput(map->s_uspace.s_table);
1852 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
1853 iput(map->s_fspace.s_table);
1854 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
1855 udf_sb_free_bitmap(map->s_uspace.s_bitmap);
1856 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
1857 udf_sb_free_bitmap(map->s_fspace.s_bitmap);
1858 if (map->s_partition_type == UDF_SPARABLE_MAP15)
1859 for (i = 0; i < 4; i++)
1860 brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
Jan Karabfb257a2008-04-08 20:37:21 +02001861 else if (map->s_partition_type == UDF_METADATA_MAP25) {
1862 mdata = &map->s_type_specific.s_metadata;
1863 iput(mdata->s_metadata_fe);
1864 mdata->s_metadata_fe = NULL;
1865
1866 iput(mdata->s_mirror_fe);
1867 mdata->s_mirror_fe = NULL;
1868
1869 iput(mdata->s_bitmap_fe);
1870 mdata->s_bitmap_fe = NULL;
1871 }
Jan Kara2e0838f2008-04-01 18:08:51 +02001872}
1873
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874static int udf_fill_super(struct super_block *sb, void *options, int silent)
1875{
1876 int i;
Jan Kara40346002009-03-19 16:21:38 +01001877 int ret;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001878 struct inode *inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 struct udf_options uopt;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02001880 struct kernel_lb_addr rootdir, fileset;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 struct udf_sb_info *sbi;
1882
1883 uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
1884 uopt.uid = -1;
1885 uopt.gid = -1;
1886 uopt.umask = 0;
Marcin Slusarz87bc7302008-12-02 13:40:11 +01001887 uopt.fmode = UDF_INVALID_MODE;
1888 uopt.dmode = UDF_INVALID_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001890 sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 if (!sbi)
1892 return -ENOMEM;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07001893
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 sb->s_fs_info = sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895
Ingo Molnar1e7933d2006-03-23 03:00:44 -08001896 mutex_init(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897
Miklos Szeredi6da80892008-02-08 04:21:50 -08001898 if (!udf_parse_options((char *)options, &uopt, false))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899 goto error_out;
1900
1901 if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001902 uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 udf_error(sb, "udf_read_super",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001904 "utf8 cannot be combined with iocharset\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905 goto error_out;
1906 }
1907#ifdef CONFIG_UDF_NLS
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001908 if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 uopt.nls_map = load_nls_default();
1910 if (!uopt.nls_map)
1911 uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
1912 else
1913 udf_debug("Using default NLS map\n");
1914 }
1915#endif
1916 if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
1917 uopt.flags |= (1 << UDF_FLAG_UTF8);
1918
1919 fileset.logicalBlockNum = 0xFFFFFFFF;
1920 fileset.partitionReferenceNum = 0xFFFF;
1921
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001922 sbi->s_flags = uopt.flags;
1923 sbi->s_uid = uopt.uid;
1924 sbi->s_gid = uopt.gid;
1925 sbi->s_umask = uopt.umask;
Marcin Slusarz7ac9bcd2008-11-16 20:52:19 +01001926 sbi->s_fmode = uopt.fmode;
1927 sbi->s_dmode = uopt.dmode;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001928 sbi->s_nls_map = uopt.nls_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001930 if (uopt.session == 0xFFFFFFFF)
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001931 sbi->s_session = udf_get_last_session(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 else
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001933 sbi->s_session = uopt.session;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001935 udf_debug("Multi-session=%d\n", sbi->s_session);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 /* Fill in the rest of the superblock */
1938 sb->s_op = &udf_sb_ops;
Rasmus Rohde221e5832008-04-30 17:22:06 +02001939 sb->s_export_op = &udf_export_ops;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -04001940
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 sb->s_dirt = 0;
1942 sb->s_magic = UDF_SUPER_MAGIC;
1943 sb->s_time_gran = 1000;
1944
Jan Kara40346002009-03-19 16:21:38 +01001945 if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
1946 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1947 } else {
Martin K. Petersene1defc42009-05-22 17:17:49 -04001948 uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
Jan Kara40346002009-03-19 16:21:38 +01001949 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1950 if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
1951 if (!silent)
1952 printk(KERN_NOTICE
1953 "UDF-fs: Rescanning with blocksize "
1954 "%d\n", UDF_DEFAULT_BLOCKSIZE);
1955 uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
1956 ret = udf_load_vrs(sb, &uopt, silent, &fileset);
1957 }
1958 }
1959 if (!ret) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001960 printk(KERN_WARNING "UDF-fs: No partition found (1)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961 goto error_out;
1962 }
1963
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001964 udf_debug("Lastblock=%d\n", sbi->s_last_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001966 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001967 struct logicalVolIntegrityDescImpUse *lvidiu =
1968 udf_sb_lvidiu(sbi);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001969 uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
1970 uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
Marcin Slusarz4b111112008-02-08 04:20:36 -08001971 /* uint16_t maxUDFWriteRev =
1972 le16_to_cpu(lvidiu->maxUDFWriteRev); */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001974 if (minUDFReadRev > UDF_MAX_READ_VERSION) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08001975 printk(KERN_ERR "UDF-fs: minUDFReadRev=%x "
1976 "(max is %x)\n",
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001977 le16_to_cpu(lvidiu->minUDFReadRev),
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07001978 UDF_MAX_READ_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 goto error_out;
Marcin Slusarz4b111112008-02-08 04:20:36 -08001980 } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 sb->s_flags |= MS_RDONLY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001983 sbi->s_udfrev = minUDFWriteRev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984
1985 if (minUDFReadRev >= UDF_VERS_USE_EXTENDED_FE)
1986 UDF_SET_FLAG(sb, UDF_FLAG_USE_EXTENDED_FE);
1987 if (minUDFReadRev >= UDF_VERS_USE_STREAMS)
1988 UDF_SET_FLAG(sb, UDF_FLAG_USE_STREAMS);
1989 }
1990
Marcin Slusarz6c79e982008-02-08 04:20:30 -08001991 if (!sbi->s_partitions) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08001992 printk(KERN_WARNING "UDF-fs: No partition found (2)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 goto error_out;
1994 }
1995
Marcin Slusarz4b111112008-02-08 04:20:36 -08001996 if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
1997 UDF_PART_FLAG_READ_ONLY) {
1998 printk(KERN_NOTICE "UDF-fs: Partition marked readonly; "
1999 "forcing readonly mount\n");
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002000 sb->s_flags |= MS_RDONLY;
Peter Osterlundc1a26e72006-10-05 21:17:50 +02002001 }
Eric Sandeen39b3f6d2006-09-29 01:59:41 -07002002
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002003 if (udf_find_fileset(sb, &fileset, &rootdir)) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002004 printk(KERN_WARNING "UDF-fs: No fileset found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 goto error_out;
2006 }
2007
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002008 if (!silent) {
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002009 struct timestamp ts;
Marcin Slusarz56774802008-02-10 11:25:31 +01002010 udf_time_to_disk_stamp(&ts, sbi->s_record_time);
Adrian Bunka9ca6632008-02-08 04:20:47 -08002011 udf_info("UDF: Mounting volume '%s', "
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002012 "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
Marcin Slusarz56774802008-02-10 11:25:31 +01002013 sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
2014 ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015 }
2016 if (!(sb->s_flags & MS_RDONLY))
2017 udf_open_lvid(sb);
2018
2019 /* Assign the root inode */
2020 /* assign inodes by physical block number */
2021 /* perhaps it's not extensible enough, but for now ... */
Pekka Enberg97e961f2008-10-15 12:29:03 +02002022 inode = udf_iget(sb, &rootdir);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002023 if (!inode) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002024 printk(KERN_ERR "UDF-fs: Error in udf_iget, block=%d, "
2025 "partition=%d\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002026 rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027 goto error_out;
2028 }
2029
2030 /* Allocate a dentry for the root inode */
2031 sb->s_root = d_alloc_root(inode);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002032 if (!sb->s_root) {
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002033 printk(KERN_ERR "UDF-fs: Couldn't allocate root dentry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034 iput(inode);
2035 goto error_out;
2036 }
Jan Kara31170b62007-05-08 00:35:21 -07002037 sb->s_maxbytes = MAX_LFS_FILESIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038 return 0;
2039
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002040error_out:
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002041 if (sbi->s_vat_inode)
2042 iput(sbi->s_vat_inode);
Jan Kara2e0838f2008-04-01 18:08:51 +02002043 if (sbi->s_partitions)
2044 for (i = 0; i < sbi->s_partitions; i++)
2045 udf_free_partition(&sbi->s_partmaps[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046#ifdef CONFIG_UDF_NLS
2047 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002048 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049#endif
2050 if (!(sb->s_flags & MS_RDONLY))
2051 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002052 brelse(sbi->s_lvid_bh);
2053
2054 kfree(sbi->s_partmaps);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055 kfree(sbi);
2056 sb->s_fs_info = NULL;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002057
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 return -EINVAL;
2059}
2060
Adrian Bunkb8145a72008-02-17 10:19:55 +02002061static void udf_error(struct super_block *sb, const char *function,
2062 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063{
2064 va_list args;
2065
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002066 if (!(sb->s_flags & MS_RDONLY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067 /* mark sb error */
2068 sb->s_dirt = 1;
2069 }
2070 va_start(args, fmt);
Alexey Dobriyan4a6e6172006-12-06 20:37:04 -08002071 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 va_end(args);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002073 printk(KERN_CRIT "UDF-fs error (device %s): %s: %s\n",
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002074 sb->s_id, function, error_buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075}
2076
2077void udf_warning(struct super_block *sb, const char *function,
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002078 const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079{
2080 va_list args;
2081
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002082 va_start(args, fmt);
Alexey Dobriyan4a6e6172006-12-06 20:37:04 -08002083 vsnprintf(error_buf, sizeof(error_buf), fmt, args);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 va_end(args);
2085 printk(KERN_WARNING "UDF-fs warning (device %s): %s: %s\n",
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002086 sb->s_id, function, error_buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087}
2088
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002089static void udf_put_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090{
2091 int i;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002092 struct udf_sb_info *sbi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002094 sbi = UDF_SB(sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002095
2096 lock_kernel();
2097
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002098 if (sbi->s_vat_inode)
2099 iput(sbi->s_vat_inode);
Jan Kara2e0838f2008-04-01 18:08:51 +02002100 if (sbi->s_partitions)
2101 for (i = 0; i < sbi->s_partitions; i++)
2102 udf_free_partition(&sbi->s_partmaps[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103#ifdef CONFIG_UDF_NLS
2104 if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002105 unload_nls(sbi->s_nls_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106#endif
2107 if (!(sb->s_flags & MS_RDONLY))
2108 udf_close_lvid(sb);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002109 brelse(sbi->s_lvid_bh);
2110 kfree(sbi->s_partmaps);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 kfree(sb->s_fs_info);
2112 sb->s_fs_info = NULL;
Christoph Hellwig6cfd0142009-05-05 15:40:36 +02002113
2114 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115}
2116
Jan Kara146bca72009-03-16 18:27:37 +01002117static int udf_sync_fs(struct super_block *sb, int wait)
2118{
2119 struct udf_sb_info *sbi = UDF_SB(sb);
2120
2121 mutex_lock(&sbi->s_alloc_mutex);
2122 if (sbi->s_lvid_dirty) {
2123 /*
2124 * Blockdevice will be synced later so we don't have to submit
2125 * the buffer for IO
2126 */
2127 mark_buffer_dirty(sbi->s_lvid_bh);
2128 sb->s_dirt = 0;
2129 sbi->s_lvid_dirty = 0;
2130 }
2131 mutex_unlock(&sbi->s_alloc_mutex);
2132
2133 return 0;
2134}
2135
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002136static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137{
David Howells726c3342006-06-23 02:02:58 -07002138 struct super_block *sb = dentry->d_sb;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002139 struct udf_sb_info *sbi = UDF_SB(sb);
2140 struct logicalVolIntegrityDescImpUse *lvidiu;
Coly Li557f5a12009-01-20 01:36:55 +08002141 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002142
2143 if (sbi->s_lvid_bh != NULL)
2144 lvidiu = udf_sb_lvidiu(sbi);
2145 else
2146 lvidiu = NULL;
David Howells726c3342006-06-23 02:02:58 -07002147
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148 buf->f_type = UDF_SUPER_MAGIC;
2149 buf->f_bsize = sb->s_blocksize;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002150 buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 buf->f_bfree = udf_count_free(sb);
2152 buf->f_bavail = buf->f_bfree;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002153 buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
2154 le32_to_cpu(lvidiu->numDirs)) : 0)
2155 + buf->f_bfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 buf->f_ffree = buf->f_bfree;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002157 buf->f_namelen = UDF_NAME_LEN - 2;
Coly Li557f5a12009-01-20 01:36:55 +08002158 buf->f_fsid.val[0] = (u32)id;
2159 buf->f_fsid.val[1] = (u32)(id >> 32);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160
2161 return 0;
2162}
2163
Marcin Slusarz4b111112008-02-08 04:20:36 -08002164static unsigned int udf_count_free_bitmap(struct super_block *sb,
2165 struct udf_bitmap *bitmap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166{
2167 struct buffer_head *bh = NULL;
2168 unsigned int accum = 0;
2169 int index;
2170 int block = 0, newblock;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002171 struct kernel_lb_addr loc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172 uint32_t bytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173 uint8_t *ptr;
2174 uint16_t ident;
2175 struct spaceBitmapDesc *bm;
2176
2177 lock_kernel();
2178
2179 loc.logicalBlockNum = bitmap->s_extPosition;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002180 loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
Pekka Enberg97e961f2008-10-15 12:29:03 +02002181 bh = udf_read_ptagged(sb, &loc, 0, &ident);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002183 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 printk(KERN_ERR "udf: udf_count_free failed\n");
2185 goto out;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002186 } else if (ident != TAG_IDENT_SBD) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002187 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 printk(KERN_ERR "udf: udf_count_free failed\n");
2189 goto out;
2190 }
2191
2192 bm = (struct spaceBitmapDesc *)bh->b_data;
2193 bytes = le32_to_cpu(bm->numOfBytes);
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002194 index = sizeof(struct spaceBitmapDesc); /* offset in first block only */
2195 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002197 while (bytes > 0) {
Marcin Slusarz01b954a2008-02-02 22:37:07 +01002198 u32 cur_bytes = min_t(u32, bytes, sb->s_blocksize - index);
2199 accum += bitmap_weight((const unsigned long *)(ptr + index),
2200 cur_bytes * 8);
2201 bytes -= cur_bytes;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002202 if (bytes) {
Jan Kara3bf25cb2007-05-08 00:35:16 -07002203 brelse(bh);
Pekka Enberg97e961f2008-10-15 12:29:03 +02002204 newblock = udf_get_lb_pblock(sb, &loc, ++block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205 bh = udf_tread(sb, newblock);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002206 if (!bh) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 udf_debug("read failed\n");
2208 goto out;
2209 }
2210 index = 0;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002211 ptr = (uint8_t *)bh->b_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212 }
2213 }
Jan Kara3bf25cb2007-05-08 00:35:16 -07002214 brelse(bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002216out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 unlock_kernel();
2218
2219 return accum;
2220}
2221
Marcin Slusarz4b111112008-02-08 04:20:36 -08002222static unsigned int udf_count_free_table(struct super_block *sb,
2223 struct inode *table)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224{
2225 unsigned int accum = 0;
Jan Karaff116fc2007-05-08 00:35:14 -07002226 uint32_t elen;
Pekka Enberg5ca4e4b2008-10-15 12:28:03 +02002227 struct kernel_lb_addr eloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228 int8_t etype;
Jan Karaff116fc2007-05-08 00:35:14 -07002229 struct extent_position epos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230
2231 lock_kernel();
2232
Marcin Slusarzc0b34432008-02-08 04:20:42 -08002233 epos.block = UDF_I(table)->i_location;
Jan Karaff116fc2007-05-08 00:35:14 -07002234 epos.offset = sizeof(struct unallocSpaceEntry);
2235 epos.bh = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002237 while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238 accum += (elen >> table->i_sb->s_blocksize_bits);
Marcin Slusarz3a71fc52008-02-08 04:20:28 -08002239
Jan Kara3bf25cb2007-05-08 00:35:16 -07002240 brelse(epos.bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241
2242 unlock_kernel();
2243
2244 return accum;
2245}
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -07002246
2247static unsigned int udf_count_free(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248{
2249 unsigned int accum = 0;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002250 struct udf_sb_info *sbi;
2251 struct udf_part_map *map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002253 sbi = UDF_SB(sb);
2254 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002255 struct logicalVolIntegrityDesc *lvid =
2256 (struct logicalVolIntegrityDesc *)
2257 sbi->s_lvid_bh->b_data;
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002258 if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
Marcin Slusarz4b111112008-02-08 04:20:36 -08002259 accum = le32_to_cpu(
2260 lvid->freeSpaceTable[sbi->s_partition]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 if (accum == 0xFFFFFFFF)
2262 accum = 0;
2263 }
2264 }
2265
2266 if (accum)
2267 return accum;
2268
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002269 map = &sbi->s_partmaps[sbi->s_partition];
2270 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002271 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002272 map->s_uspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002274 if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002275 accum += udf_count_free_bitmap(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002276 map->s_fspace.s_bitmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277 }
2278 if (accum)
2279 return accum;
2280
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002281 if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002282 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002283 map->s_uspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284 }
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002285 if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
Cyrill Gorcunov28de7942007-07-21 04:37:18 -07002286 accum += udf_count_free_table(sb,
Marcin Slusarz6c79e982008-02-08 04:20:30 -08002287 map->s_fspace.s_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 }
2289
2290 return accum;
2291}