162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * fs/bfs/bfs.h 462306a36Sopenharmony_ci * Copyright (C) 1999-2018 Tigran Aivazian <aivazian.tigran@gmail.com> 562306a36Sopenharmony_ci */ 662306a36Sopenharmony_ci#ifndef _FS_BFS_BFS_H 762306a36Sopenharmony_ci#define _FS_BFS_BFS_H 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci#include <linux/bfs_fs.h> 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ci/* In theory BFS supports up to 512 inodes, numbered from 2 (for /) up to 513 inclusive. 1262306a36Sopenharmony_ci In actual fact, attempting to create the 512th inode (i.e. inode No. 513 or file No. 511) 1362306a36Sopenharmony_ci will fail with ENOSPC in bfs_add_entry(): the root directory cannot contain so many entries, counting '..'. 1462306a36Sopenharmony_ci So, mkfs.bfs(8) should really limit its -N option to 511 and not 512. For now, we just print a warning 1562306a36Sopenharmony_ci if a filesystem is mounted with such "impossible to fill up" number of inodes */ 1662306a36Sopenharmony_ci#define BFS_MAX_LASTI 513 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ci/* 1962306a36Sopenharmony_ci * BFS file system in-core superblock info 2062306a36Sopenharmony_ci */ 2162306a36Sopenharmony_cistruct bfs_sb_info { 2262306a36Sopenharmony_ci unsigned long si_blocks; 2362306a36Sopenharmony_ci unsigned long si_freeb; 2462306a36Sopenharmony_ci unsigned long si_freei; 2562306a36Sopenharmony_ci unsigned long si_lf_eblk; 2662306a36Sopenharmony_ci unsigned long si_lasti; 2762306a36Sopenharmony_ci DECLARE_BITMAP(si_imap, BFS_MAX_LASTI+1); 2862306a36Sopenharmony_ci struct mutex bfs_lock; 2962306a36Sopenharmony_ci}; 3062306a36Sopenharmony_ci 3162306a36Sopenharmony_ci/* 3262306a36Sopenharmony_ci * BFS file system in-core inode info 3362306a36Sopenharmony_ci */ 3462306a36Sopenharmony_cistruct bfs_inode_info { 3562306a36Sopenharmony_ci unsigned long i_dsk_ino; /* inode number from the disk, can be 0 */ 3662306a36Sopenharmony_ci unsigned long i_sblock; 3762306a36Sopenharmony_ci unsigned long i_eblock; 3862306a36Sopenharmony_ci struct inode vfs_inode; 3962306a36Sopenharmony_ci}; 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_cistatic inline struct bfs_sb_info *BFS_SB(struct super_block *sb) 4262306a36Sopenharmony_ci{ 4362306a36Sopenharmony_ci return sb->s_fs_info; 4462306a36Sopenharmony_ci} 4562306a36Sopenharmony_ci 4662306a36Sopenharmony_cistatic inline struct bfs_inode_info *BFS_I(struct inode *inode) 4762306a36Sopenharmony_ci{ 4862306a36Sopenharmony_ci return container_of(inode, struct bfs_inode_info, vfs_inode); 4962306a36Sopenharmony_ci} 5062306a36Sopenharmony_ci 5162306a36Sopenharmony_ci 5262306a36Sopenharmony_ci#define printf(format, args...) \ 5362306a36Sopenharmony_ci printk(KERN_ERR "BFS-fs: %s(): " format, __func__, ## args) 5462306a36Sopenharmony_ci 5562306a36Sopenharmony_ci/* inode.c */ 5662306a36Sopenharmony_ciextern struct inode *bfs_iget(struct super_block *sb, unsigned long ino); 5762306a36Sopenharmony_ciextern void bfs_dump_imap(const char *, struct super_block *); 5862306a36Sopenharmony_ci 5962306a36Sopenharmony_ci/* file.c */ 6062306a36Sopenharmony_ciextern const struct inode_operations bfs_file_inops; 6162306a36Sopenharmony_ciextern const struct file_operations bfs_file_operations; 6262306a36Sopenharmony_ciextern const struct address_space_operations bfs_aops; 6362306a36Sopenharmony_ci 6462306a36Sopenharmony_ci/* dir.c */ 6562306a36Sopenharmony_ciextern const struct inode_operations bfs_dir_inops; 6662306a36Sopenharmony_ciextern const struct file_operations bfs_dir_operations; 6762306a36Sopenharmony_ci 6862306a36Sopenharmony_ci#endif /* _FS_BFS_BFS_H */ 69