1 #ifndef _OMFS_H
2 #define _OMFS_H
3 
4 #include <linux/module.h>
5 #include <linux/fs.h>
6 
7 #include "omfs_fs.h"
8 
9 /* In-memory structures */
10 struct omfs_sb_info {
11 	u64 s_num_blocks;
12 	u64 s_bitmap_ino;
13 	u64 s_root_ino;
14 	u32 s_blocksize;
15 	u32 s_mirrors;
16 	u32 s_sys_blocksize;
17 	u32 s_clustersize;
18 	int s_block_shift;
19 	unsigned long **s_imap;
20 	int s_imap_size;
21 	struct mutex s_bitmap_lock;
22 	int s_uid;
23 	int s_gid;
24 	int s_dmask;
25 	int s_fmask;
26 };
27 
28 /* convert a cluster number to a scaled block number */
clus_to_blk(struct omfs_sb_info * sbi,sector_t block)29 static inline sector_t clus_to_blk(struct omfs_sb_info *sbi, sector_t block)
30 {
31 	return block << sbi->s_block_shift;
32 }
33 
OMFS_SB(struct super_block * sb)34 static inline struct omfs_sb_info *OMFS_SB(struct super_block *sb)
35 {
36 	return sb->s_fs_info;
37 }
38 
39 /* bitmap.c */
40 extern unsigned long omfs_count_free(struct super_block *sb);
41 extern int omfs_allocate_block(struct super_block *sb, u64 block);
42 extern int omfs_allocate_range(struct super_block *sb, int min_request,
43 			int max_request, u64 *return_block, int *return_size);
44 extern int omfs_clear_range(struct super_block *sb, u64 block, int count);
45 
46 /* dir.c */
47 extern const struct file_operations omfs_dir_operations;
48 extern const struct inode_operations omfs_dir_inops;
49 extern int omfs_make_empty(struct inode *inode, struct super_block *sb);
50 extern int omfs_is_bad(struct omfs_sb_info *sbi, struct omfs_header *header,
51 			u64 fsblock);
52 
53 /* file.c */
54 extern const struct file_operations omfs_file_operations;
55 extern const struct inode_operations omfs_file_inops;
56 extern const struct address_space_operations omfs_aops;
57 extern void omfs_make_empty_table(struct buffer_head *bh, int offset);
58 extern int omfs_shrink_inode(struct inode *inode);
59 
60 /* inode.c */
61 extern struct buffer_head *omfs_bread(struct super_block *sb, sector_t block);
62 extern struct inode *omfs_iget(struct super_block *sb, ino_t inode);
63 extern struct inode *omfs_new_inode(struct inode *dir, int mode);
64 extern int omfs_reserve_block(struct super_block *sb, sector_t block);
65 extern int omfs_find_empty_block(struct super_block *sb, int mode, ino_t *ino);
66 extern int omfs_sync_inode(struct inode *inode);
67 
68 #endif
69