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Diffstat (limited to 'fs/bfs/bfs.h')
| -rw-r--r-- | fs/bfs/bfs.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/fs/bfs/bfs.h b/fs/bfs/bfs.h new file mode 100644 index 000000000..606f9378b --- /dev/null +++ b/fs/bfs/bfs.h @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * fs/bfs/bfs.h + * Copyright (C) 1999-2018 Tigran Aivazian <aivazian.tigran@gmail.com> + */ +#ifndef _FS_BFS_BFS_H +#define _FS_BFS_BFS_H + +#include <linux/bfs_fs.h> + +/* In theory BFS supports up to 512 inodes, numbered from 2 (for /) up to 513 inclusive. + In actual fact, attempting to create the 512th inode (i.e. inode No. 513 or file No. 511) + will fail with ENOSPC in bfs_add_entry(): the root directory cannot contain so many entries, counting '..'. + So, mkfs.bfs(8) should really limit its -N option to 511 and not 512. For now, we just print a warning + if a filesystem is mounted with such "impossible to fill up" number of inodes */ +#define BFS_MAX_LASTI 513 + +/* + * BFS file system in-core superblock info + */ +struct bfs_sb_info { + unsigned long si_blocks; + unsigned long si_freeb; + unsigned long si_freei; + unsigned long si_lf_eblk; + unsigned long si_lasti; + DECLARE_BITMAP(si_imap, BFS_MAX_LASTI+1); + struct mutex bfs_lock; +}; + +/* + * BFS file system in-core inode info + */ +struct bfs_inode_info { + unsigned long i_dsk_ino; /* inode number from the disk, can be 0 */ + unsigned long i_sblock; + unsigned long i_eblock; + struct inode vfs_inode; +}; + +static inline struct bfs_sb_info *BFS_SB(struct super_block *sb) +{ + return sb->s_fs_info; +} + +static inline struct bfs_inode_info *BFS_I(struct inode *inode) +{ + return container_of(inode, struct bfs_inode_info, vfs_inode); +} + + +#define printf(format, args...) \ + printk(KERN_ERR "BFS-fs: %s(): " format, __func__, ## args) + +/* inode.c */ +extern struct inode *bfs_iget(struct super_block *sb, unsigned long ino); +extern void bfs_dump_imap(const char *, struct super_block *); + +/* file.c */ +extern const struct inode_operations bfs_file_inops; +extern const struct file_operations bfs_file_operations; +extern const struct address_space_operations bfs_aops; + +/* dir.c */ +extern const struct inode_operations bfs_dir_inops; +extern const struct file_operations bfs_dir_operations; + +#endif /* _FS_BFS_BFS_H */ |