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 70