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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * fs/bfs/bfs.h4 * Copyright (C) 1999-2018 Tigran Aivazian <aivazian.tigran@gmail.com>5 */6#ifndef _FS_BFS_BFS_H7#define _FS_BFS_BFS_H8 9#include <linux/bfs_fs.h>10 11/* In theory BFS supports up to 512 inodes, numbered from 2 (for /) up to 513 inclusive.12 In actual fact, attempting to create the 512th inode (i.e. inode No. 513 or file No. 511)13 will fail with ENOSPC in bfs_add_entry(): the root directory cannot contain so many entries, counting '..'.14 So, mkfs.bfs(8) should really limit its -N option to 511 and not 512. For now, we just print a warning15 if a filesystem is mounted with such "impossible to fill up" number of inodes */16#define BFS_MAX_LASTI 51317 18/*19 * BFS file system in-core superblock info20 */21struct bfs_sb_info {22 unsigned long si_blocks;23 unsigned long si_freeb;24 unsigned long si_freei;25 unsigned long si_lf_eblk;26 unsigned long si_lasti;27 DECLARE_BITMAP(si_imap, BFS_MAX_LASTI+1);28 struct mutex bfs_lock;29};30 31/*32 * BFS file system in-core inode info33 */34struct bfs_inode_info {35 unsigned long i_dsk_ino; /* inode number from the disk, can be 0 */36 unsigned long i_sblock;37 unsigned long i_eblock;38 struct inode vfs_inode;39};40 41static inline struct bfs_sb_info *BFS_SB(struct super_block *sb)42{43 return sb->s_fs_info;44}45 46static inline struct bfs_inode_info *BFS_I(struct inode *inode)47{48 return container_of(inode, struct bfs_inode_info, vfs_inode);49}50 51 52#define printf(format, args...) \53 printk(KERN_ERR "BFS-fs: %s(): " format, __func__, ## args)54 55/* inode.c */56extern struct inode *bfs_iget(struct super_block *sb, unsigned long ino);57extern void bfs_dump_imap(const char *, struct super_block *);58 59/* file.c */60extern const struct inode_operations bfs_file_inops;61extern const struct file_operations bfs_file_operations;62extern const struct address_space_operations bfs_aops;63 64/* dir.c */65extern const struct inode_operations bfs_dir_inops;66extern const struct file_operations bfs_dir_operations;67 68#endif /* _FS_BFS_BFS_H */69