mirror of
https://github.com/torvalds/linux.git
synced 2024-11-13 23:51:39 +00:00
d187715589
Strengthen validation of BFS superblock against corruption. Make in-core inode bitmap static part of superblock info structure. Print a warning when mounting a BFS filesystem created with "-N 512" option as only 510 files can be created in the root directory. Make the kernel messages more uniform. Update the 'prefix' passed to bfs_dump_imap() to match the current naming of operations. White space and comments cleanup. Link: http://lkml.kernel.org/r/CAK+_RLkFZMduoQF36wZFd3zLi-6ZutWKsydjeHFNdtRvZZEb4w@mail.gmail.com Signed-off-by: Tigran Aivazian <aivazian.tigran@gmail.com> Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/* 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 */
|