/* 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);