2 * sysfs.h - sysfs support declarations.
4 * Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation.
5 * Copyright (C) 2014 HGST, Inc., a Western Digital Company.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * Written by Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com>
20 #ifndef _NILFS_SYSFS_H
21 #define _NILFS_SYSFS_H
23 #include <linux/sysfs.h>
25 #define NILFS_ROOT_GROUP_NAME "nilfs2"
27 #define NILFS_COMMON_ATTR_STRUCT(name) \
28 struct nilfs_##name##_attr { \
29 struct attribute attr; \
30 ssize_t (*show)(struct kobject *, struct attribute *, \
32 ssize_t (*store)(struct kobject *, struct attribute *, \
33 const char *, size_t); \
36 NILFS_COMMON_ATTR_STRUCT(feature);
38 #define NILFS_ATTR(type, name, mode, show, store) \
39 static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \
40 __ATTR(name, mode, show, store)
42 #define NILFS_INFO_ATTR(type, name) \
43 NILFS_ATTR(type, name, 0444, NULL, NULL)
44 #define NILFS_RO_ATTR(type, name) \
45 NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL)
46 #define NILFS_RW_ATTR(type, name) \
47 NILFS_ATTR(type, name, 0644, \
48 nilfs_##type##_##name##_show, \
49 nilfs_##type##_##name##_store)
51 #define NILFS_FEATURE_INFO_ATTR(name) \
52 NILFS_INFO_ATTR(feature, name)
53 #define NILFS_FEATURE_RO_ATTR(name) \
54 NILFS_RO_ATTR(feature, name)
55 #define NILFS_FEATURE_RW_ATTR(name) \
56 NILFS_RW_ATTR(feature, name)
58 #define NILFS_FEATURE_ATTR_LIST(name) \
59 (&nilfs_feature_attr_##name.attr)
61 #endif /* _NILFS_SYSFS_H */