fs/omfs/omfs.h

   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         kuid_t s_uid;
  23         kgid_t s_gid;
  24         int s_dmask;
  25         int s_fmask;
  26 };
  27
  28 /* convert a cluster number to a scaled block number */
  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
  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, umode_t 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