projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | /* |
| 3 | * fs/bfs/bfs.h | |
| d1877155 | 4 | * Copyright (C) 1999-2018 Tigran Aivazian <[email protected]> |
| 1da177e4 LT |
5 | */ |
| 6 | #ifndef _FS_BFS_BFS_H | |
| 7 | #define _FS_BFS_BFS_H | |
| 8 | ||
| 9 | #include <linux/bfs_fs.h> | |
| 10 | ||
| d1877155 TA |
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 warning | |
| 15 | if a filesystem is mounted with such "impossible to fill up" number of inodes */ | |
| 16 | #define BFS_MAX_LASTI 513 | |
| 17 | ||
| 1da177e4 LT |
18 | /* |
| 19 | * BFS file system in-core superblock info | |
| 20 | */ | |
| 21 | struct bfs_sb_info { | |
| 22 | unsigned long si_blocks; | |
| 23 | unsigned long si_freeb; | |
| 24 | unsigned long si_freei; | |
| 1da177e4 LT |
25 | unsigned long si_lf_eblk; |
| 26 | unsigned long si_lasti; | |
| d1877155 | 27 | DECLARE_BITMAP(si_imap, BFS_MAX_LASTI+1); |
| 3f165e4c | 28 | struct mutex bfs_lock; |
| 1da177e4 LT |
29 | }; |
| 30 | ||
| 31 | /* | |
| 32 | * BFS file system in-core inode info | |
| 33 | */ | |
| 34 | struct 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 | ||
| 41 | static inline struct bfs_sb_info *BFS_SB(struct super_block *sb) | |
| 42 | { | |
| 43 | return sb->s_fs_info; | |
| 44 | } | |
| 45 | ||
| 46 | static inline struct bfs_inode_info *BFS_I(struct inode *inode) | |
| 47 | { | |
| f433dc56 | 48 | return container_of(inode, struct bfs_inode_info, vfs_inode); |
| 1da177e4 LT |
49 | } |
| 50 | ||
| 51 | ||
| 52 | #define printf(format, args...) \ | |
| 8e24eea7 | 53 | printk(KERN_ERR "BFS-fs: %s(): " format, __func__, ## args) |
| 1da177e4 | 54 | |
| e33ab086 DH |
55 | /* inode.c */ |
| 56 | extern struct inode *bfs_iget(struct super_block *sb, unsigned long ino); | |
| 1da85fdf | 57 | extern void bfs_dump_imap(const char *, struct super_block *); |
| 1da177e4 LT |
58 | |
| 59 | /* file.c */ | |
| 754661f1 | 60 | extern const struct inode_operations bfs_file_inops; |
| 4b6f5d20 | 61 | extern const struct file_operations bfs_file_operations; |
| f5e54d6e | 62 | extern const struct address_space_operations bfs_aops; |
| 1da177e4 LT |
63 | |
| 64 | /* dir.c */ | |
| 754661f1 | 65 | extern const struct inode_operations bfs_dir_inops; |
| 4b6f5d20 | 66 | extern const struct file_operations bfs_dir_operations; |
| 1da177e4 LT |
67 | |
| 68 | #endif /* _FS_BFS_BFS_H */ |