fs/omfs/omfs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _OMFS_H
   3 #define _OMFS_H
   4
   5 #include <linux/module.h>
   6 #include <linux/fs.h>
   7
   8 #include "omfs_fs.h"
   9
  10 /* In-memory structures */
  11 struct omfs_sb_info {
  12         u64 s_num_blocks;
  13         u64 s_bitmap_ino;
  14         u64 s_root_ino;
  15         u32 s_blocksize;
  16         u32 s_mirrors;
  17         u32 s_sys_blocksize;
  18         u32 s_clustersize;
  19         int s_block_shift;
  20         unsigned long **s_imap;
  21         int s_imap_size;
  22         struct mutex s_bitmap_lock;
  23         kuid_t s_uid;
  24         kgid_t s_gid;
  25         int s_dmask;
  26         int s_fmask;
  27 };
  28
  29 /* convert a cluster number to a scaled block number */
  30 static inline sector_t clus_to_blk(struct omfs_sb_info *sbi, sector_t block)
  31 {
  32         return block << sbi->s_block_shift;
  33 }
  34
  35 static inline struct omfs_sb_info *OMFS_SB(struct super_block *sb)
  36 {
  37         return sb->s_fs_info;
  38 }
  39
  40 /* bitmap.c */
  41 extern unsigned long omfs_count_free(struct super_block *sb);
  42 extern int omfs_allocate_block(struct super_block *sb, u64 block);
  43 extern int omfs_allocate_range(struct super_block *sb, int min_request,
  44                         int max_request, u64 *return_block, int *return_size);
  45 extern int omfs_clear_range(struct super_block *sb, u64 block, int count);
  46
  47 /* dir.c */
  48 extern const struct file_operations omfs_dir_operations;
  49 extern const struct inode_operations omfs_dir_inops;
  50 extern int omfs_make_empty(struct inode *inode, struct super_block *sb);
  51 extern int omfs_is_bad(struct omfs_sb_info *sbi, struct omfs_header *header,
  52                         u64 fsblock);
  53
  54 /* file.c */
  55 extern const struct file_operations omfs_file_operations;
  56 extern const struct inode_operations omfs_file_inops;
  57 extern const struct address_space_operations omfs_aops;
  58 extern void omfs_make_empty_table(struct buffer_head *bh, int offset);
  59 extern int omfs_shrink_inode(struct inode *inode);
  60
  61 /* inode.c */
  62 extern struct buffer_head *omfs_bread(struct super_block *sb, sector_t block);
  63 extern struct inode *omfs_iget(struct super_block *sb, ino_t inode);
  64 extern struct inode *omfs_new_inode(struct inode *dir, umode_t mode);
  65 extern int omfs_reserve_block(struct super_block *sb, sector_t block);
  66 extern int omfs_find_empty_block(struct super_block *sb, int mode, ino_t *ino);
  67 extern int omfs_sync_inode(struct inode *inode);
  68
  69 #endif