1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* RomFS internal definitions |
3 | * |
4 | * Copyright © 2007 Red Hat, Inc. All Rights Reserved. |
5 | * Written by David Howells (dhowells@redhat.com) |
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); |
42 | extern int romfs_dev_strcmp(struct super_block *sb, unsigned long pos, |
43 | const char *str, size_t size); |
44 | |