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