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authorAl Viro <viro@www.linux.org.uk>2005-04-25 21:32:12 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-25 21:32:12 -0400
commit94f2f715771d0aa5554451d1e2a920f11b8be3fe (patch)
tree07ebba8f6bbb91627c64c1f27e91e916dfd70756 /include/linux/iso_fs.h
parent7366d36cb967d7a3ac324c789a8b718e61d01b31 (diff)
[PATCH] isofs includes sanitized
fs/isofs includes trimmed down to something resembling sanity. Kernel-only parts of linux/iso_fs.h and entire linux/iso_fs_{sb,i}.h moved to fs/isofs/isofs.h. A lot of useless #include in fs/isofs/*.c killed. Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/iso_fs.h')
-rw-r--r--include/linux/iso_fs.h147
1 files changed, 0 insertions, 147 deletions
diff --git a/include/linux/iso_fs.h b/include/linux/iso_fs.h
index 099039d4b10d..47967878bfef 100644
--- a/include/linux/iso_fs.h
+++ b/include/linux/iso_fs.h
@@ -1,4 +1,3 @@
1
2#ifndef _ISOFS_FS_H 1#ifndef _ISOFS_FS_H
3#define _ISOFS_FS_H 2#define _ISOFS_FS_H
4 3
@@ -163,150 +162,4 @@ struct iso_directory_record {
163 162
164#define ISOFS_SUPER_MAGIC 0x9660 163#define ISOFS_SUPER_MAGIC 0x9660
165 164
166#ifdef __KERNEL__
167/* Number conversion inlines, named after the section in ISO 9660
168 they correspond to. */
169
170#include <asm/byteorder.h>
171#include <asm/unaligned.h>
172#include <linux/iso_fs_i.h>
173#include <linux/iso_fs_sb.h>
174
175static inline struct isofs_sb_info *ISOFS_SB(struct super_block *sb)
176{
177 return sb->s_fs_info;
178}
179
180static inline struct iso_inode_info *ISOFS_I(struct inode *inode)
181{
182 return container_of(inode, struct iso_inode_info, vfs_inode);
183}
184
185static inline int isonum_711(char *p)
186{
187 return *(u8 *)p;
188}
189static inline int isonum_712(char *p)
190{
191 return *(s8 *)p;
192}
193static inline unsigned int isonum_721(char *p)
194{
195 return le16_to_cpu(get_unaligned((__le16 *)p));
196}
197static inline unsigned int isonum_722(char *p)
198{
199 return be16_to_cpu(get_unaligned((__le16 *)p));
200}
201static inline unsigned int isonum_723(char *p)
202{
203 /* Ignore bigendian datum due to broken mastering programs */
204 return le16_to_cpu(get_unaligned((__le16 *)p));
205}
206static inline unsigned int isonum_731(char *p)
207{
208 return le32_to_cpu(get_unaligned((__le32 *)p));
209}
210static inline unsigned int isonum_732(char *p)
211{
212 return be32_to_cpu(get_unaligned((__le32 *)p));
213}
214static inline unsigned int isonum_733(char *p)
215{
216 /* Ignore bigendian datum due to broken mastering programs */
217 return le32_to_cpu(get_unaligned((__le32 *)p));
218}
219extern int iso_date(char *, int);
220
221struct inode; /* To make gcc happy */
222
223extern int parse_rock_ridge_inode(struct iso_directory_record *, struct inode *);
224extern int get_rock_ridge_filename(struct iso_directory_record *, char *, struct inode *);
225extern int isofs_name_translate(struct iso_directory_record *, char *, struct inode *);
226
227int get_joliet_filename(struct iso_directory_record *, unsigned char *, struct inode *);
228int get_acorn_filename(struct iso_directory_record *, char *, struct inode *);
229
230extern struct dentry *isofs_lookup(struct inode *, struct dentry *, struct nameidata *);
231extern struct buffer_head *isofs_bread(struct inode *, sector_t);
232extern int isofs_get_blocks(struct inode *, sector_t, struct buffer_head **, unsigned long);
233
234extern struct inode *isofs_iget(struct super_block *sb,
235 unsigned long block,
236 unsigned long offset);
237
238/* Because the inode number is no longer relevant to finding the
239 * underlying meta-data for an inode, we are free to choose a more
240 * convenient 32-bit number as the inode number. The inode numbering
241 * scheme was recommended by Sergey Vlasov and Eric Lammerts. */
242static inline unsigned long isofs_get_ino(unsigned long block,
243 unsigned long offset,
244 unsigned long bufbits)
245{
246 return (block << (bufbits - 5)) | (offset >> 5);
247}
248
249/* Every directory can have many redundant directory entries scattered
250 * throughout the directory tree. First there is the directory entry
251 * with the name of the directory stored in the parent directory.
252 * Then, there is the "." directory entry stored in the directory
253 * itself. Finally, there are possibly many ".." directory entries
254 * stored in all the subdirectories.
255 *
256 * In order for the NFS get_parent() method to work and for the
257 * general consistency of the dcache, we need to make sure the
258 * "i_iget5_block" and "i_iget5_offset" all point to exactly one of
259 * the many redundant entries for each directory. We normalize the
260 * block and offset by always making them point to the "." directory.
261 *
262 * Notice that we do not use the entry for the directory with the name
263 * that is located in the parent directory. Even though choosing this
264 * first directory is more natural, it is much easier to find the "."
265 * entry in the NFS get_parent() method because it is implicitly
266 * encoded in the "extent + ext_attr_length" fields of _all_ the
267 * redundant entries for the directory. Thus, it can always be
268 * reached regardless of which directory entry you have in hand.
269 *
270 * This works because the "." entry is simply the first directory
271 * record when you start reading the file that holds all the directory
272 * records, and this file starts at "extent + ext_attr_length" blocks.
273 * Because the "." entry is always the first entry listed in the
274 * directories file, the normalized "offset" value is always 0.
275 *
276 * You should pass the directory entry in "de". On return, "block"
277 * and "offset" will hold normalized values. Only directories are
278 * affected making it safe to call even for non-directory file
279 * types. */
280static inline void
281isofs_normalize_block_and_offset(struct iso_directory_record* de,
282 unsigned long *block,
283 unsigned long *offset)
284{
285 /* Only directories are normalized. */
286 if (de->flags[0] & 2) {
287 *offset = 0;
288 *block = (unsigned long)isonum_733(de->extent)
289 + (unsigned long)isonum_711(de->ext_attr_length);
290 }
291}
292
293extern struct inode_operations isofs_dir_inode_operations;
294extern struct file_operations isofs_dir_operations;
295extern struct address_space_operations isofs_symlink_aops;
296extern struct export_operations isofs_export_ops;
297
298/* The following macros are used to check for memory leaks. */
299#ifdef LEAK_CHECK
300#define free_s leak_check_free_s
301#define malloc leak_check_malloc
302#define sb_bread leak_check_bread
303#define brelse leak_check_brelse
304extern void * leak_check_malloc(unsigned int size);
305extern void leak_check_free_s(void * obj, int size);
306extern struct buffer_head * leak_check_bread(struct super_block *sb, int block);
307extern void leak_check_brelse(struct buffer_head * bh);
308#endif /* LEAK_CHECK */
309
310#endif /* __KERNEL__ */
311
312#endif 165#endif