LXR linux/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 */
  11struct 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 */
  30static inline sector_t clus_to_blk(struct omfs_sb_info *sbi, sector_t block)
  31{
  32        return block << sbi->s_block_shift;
  33}
  34
  35static inline struct omfs_sb_info *OMFS_SB(struct super_block *sb)
  36{
  37        return sb->s_fs_info;
  38}
  39
  40/* bitmap.c */
  41extern unsigned long omfs_count_free(struct super_block *sb);
  42extern int omfs_allocate_block(struct super_block *sb, u64 block);
  43extern int omfs_allocate_range(struct super_block *sb, int min_request,
  44                        int max_request, u64 *return_block, int *return_size);
  45extern int omfs_clear_range(struct super_block *sb, u64 block, int count);
  46
  47/* dir.c */
  48extern const struct file_operations omfs_dir_operations;
  49extern const struct inode_operations omfs_dir_inops;
  50extern int omfs_make_empty(struct inode *inode, struct super_block *sb);
  51extern int omfs_is_bad(struct omfs_sb_info *sbi, struct omfs_header *header,
  52                        u64 fsblock);
  53
  54/* file.c */
  55extern const struct file_operations omfs_file_operations;
  56extern const struct inode_operations omfs_file_inops;
  57extern const struct address_space_operations omfs_aops;
  58extern void omfs_make_empty_table(struct buffer_head *bh, int offset);
  59extern int omfs_shrink_inode(struct inode *inode);
  60
  61/* inode.c */
  62extern struct buffer_head *omfs_bread(struct super_block *sb, sector_t block);
  63extern struct inode *omfs_iget(struct super_block *sb, ino_t inode);
  64extern struct inode *omfs_new_inode(struct inode *dir, umode_t mode);
  65extern int omfs_reserve_block(struct super_block *sb, sector_t block);
  66extern int omfs_find_empty_block(struct super_block *sb, int mode, ino_t *ino);
  67extern int omfs_sync_inode(struct inode *inode);
  68
  69#endif
  70