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48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
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/* RomFS internal definitions
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*
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* Copyright © 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/romfs_fs.h>
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struct romfs_inode_info {
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struct inode vfs_inode;
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unsigned long i_metasize; /* size of non-data area */
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unsigned long i_dataoffset; /* from the start of fs */
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};
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static inline size_t romfs_maxsize(struct super_block *sb)
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{
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return (size_t) (unsigned long) sb->s_fs_info;
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}
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static inline struct romfs_inode_info *ROMFS_I(struct inode *inode)
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{
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return container_of(inode, struct romfs_inode_info, vfs_inode);
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}
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/*
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* mmap-nommu.c
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*/
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#if !defined(CONFIG_MMU) && defined(CONFIG_ROMFS_ON_MTD)
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extern const struct file_operations romfs_ro_fops;
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#else
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#define romfs_ro_fops generic_ro_fops
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#endif
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/*
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* storage.c
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*/
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extern int romfs_dev_read(struct super_block *sb, unsigned long pos,
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void *buf, size_t buflen);
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extern ssize_t romfs_dev_strnlen(struct super_block *sb,
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unsigned long pos, size_t maxlen);
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extern int romfs_dev_strncmp(struct super_block *sb, unsigned long pos,
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const char *str, size_t size);
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