Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
da4458bd DH |
2 | /* RomFS internal definitions |
3 | * | |
4 | * Copyright © 2007 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
da4458bd DH |
6 | */ |
7 | ||
8 | #include <linux/romfs_fs.h> | |
9 | ||
10 | struct romfs_inode_info { | |
11 | struct inode vfs_inode; | |
12 | unsigned long i_metasize; /* size of non-data area */ | |
13 | unsigned long i_dataoffset; /* from the start of fs */ | |
14 | }; | |
15 | ||
16 | static inline size_t romfs_maxsize(struct super_block *sb) | |
17 | { | |
18 | return (size_t) (unsigned long) sb->s_fs_info; | |
19 | } | |
20 | ||
21 | static inline struct romfs_inode_info *ROMFS_I(struct inode *inode) | |
22 | { | |
23 | return container_of(inode, struct romfs_inode_info, vfs_inode); | |
24 | } | |
25 | ||
26 | /* | |
27 | * mmap-nommu.c | |
28 | */ | |
29 | #if !defined(CONFIG_MMU) && defined(CONFIG_ROMFS_ON_MTD) | |
30 | extern const struct file_operations romfs_ro_fops; | |
31 | #else | |
32 | #define romfs_ro_fops generic_ro_fops | |
33 | #endif | |
34 | ||
35 | /* | |
36 | * storage.c | |
37 | */ | |
38 | extern int romfs_dev_read(struct super_block *sb, unsigned long pos, | |
39 | void *buf, size_t buflen); | |
40 | extern ssize_t romfs_dev_strnlen(struct super_block *sb, | |
41 | unsigned long pos, size_t maxlen); | |
84baf74b DH |
42 | extern int romfs_dev_strcmp(struct super_block *sb, unsigned long pos, |
43 | const char *str, size_t size); |