44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/* RomFS internal definitions
|
||
|
|
*
|
||
|
|
* Copyright © 2007 Red Hat, Inc. All Rights Reserved.
|
||
|
|
* Written by David Howells (dhowells@redhat.com)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/romfs_fs.h>
|
||
|
|
|
||
|
|
struct romfs_inode_info {
|
||
|
|
struct inode vfs_inode;
|
||
|
|
unsigned long i_metasize; /* size of non-data area */
|
||
|
|
unsigned long i_dataoffset; /* from the start of fs */
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline size_t romfs_maxsize(struct super_block *sb)
|
||
|
|
{
|
||
|
|
return (size_t) (unsigned long) sb->s_fs_info;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline struct romfs_inode_info *ROMFS_I(struct inode *inode)
|
||
|
|
{
|
||
|
|
return container_of(inode, struct romfs_inode_info, vfs_inode);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mmap-nommu.c
|
||
|
|
*/
|
||
|
|
#if !defined(CONFIG_MMU) && defined(CONFIG_ROMFS_ON_MTD)
|
||
|
|
extern const struct file_operations romfs_ro_fops;
|
||
|
|
#else
|
||
|
|
#define romfs_ro_fops generic_ro_fops
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* storage.c
|
||
|
|
*/
|
||
|
|
extern int romfs_dev_read(struct super_block *sb, unsigned long pos,
|
||
|
|
void *buf, size_t buflen);
|
||
|
|
extern ssize_t romfs_dev_strnlen(struct super_block *sb,
|
||
|
|
unsigned long pos, size_t maxlen);
|
||
|
|
extern int romfs_dev_strcmp(struct super_block *sb, unsigned long pos,
|
||
|
|
const char *str, size_t size);
|