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"
28 * struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects
29 * @sg_superblock_kobj: /sys/fs/<nilfs>/<device>/superblock
30 * @sg_superblock_kobj_unregister: completion state
31 * @sg_segctor_kobj: /sys/fs/<nilfs>/<device>/segctor
32 * @sg_segctor_kobj_unregister: completion state
34 struct nilfs_sysfs_dev_subgroups {
35 /* /sys/fs/<nilfs>/<device>/superblock */
36 struct kobject sg_superblock_kobj;
37 struct completion sg_superblock_kobj_unregister;
39 /* /sys/fs/<nilfs>/<device>/segctor */
40 struct kobject sg_segctor_kobj;
41 struct completion sg_segctor_kobj_unregister;
44 #define NILFS_COMMON_ATTR_STRUCT(name) \
45 struct nilfs_##name##_attr { \
46 struct attribute attr; \
47 ssize_t (*show)(struct kobject *, struct attribute *, \
49 ssize_t (*store)(struct kobject *, struct attribute *, \
50 const char *, size_t); \
53 NILFS_COMMON_ATTR_STRUCT(feature);
55 #define NILFS_DEV_ATTR_STRUCT(name) \
56 struct nilfs_##name##_attr { \
57 struct attribute attr; \
58 ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \
60 ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \
61 const char *, size_t); \
64 NILFS_DEV_ATTR_STRUCT(dev);
65 NILFS_DEV_ATTR_STRUCT(superblock);
66 NILFS_DEV_ATTR_STRUCT(segctor);
68 #define NILFS_ATTR(type, name, mode, show, store) \
69 static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \
70 __ATTR(name, mode, show, store)
72 #define NILFS_INFO_ATTR(type, name) \
73 NILFS_ATTR(type, name, 0444, NULL, NULL)
74 #define NILFS_RO_ATTR(type, name) \
75 NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL)
76 #define NILFS_RW_ATTR(type, name) \
77 NILFS_ATTR(type, name, 0644, \
78 nilfs_##type##_##name##_show, \
79 nilfs_##type##_##name##_store)
81 #define NILFS_FEATURE_INFO_ATTR(name) \
82 NILFS_INFO_ATTR(feature, name)
83 #define NILFS_FEATURE_RO_ATTR(name) \
84 NILFS_RO_ATTR(feature, name)
85 #define NILFS_FEATURE_RW_ATTR(name) \
86 NILFS_RW_ATTR(feature, name)
88 #define NILFS_DEV_INFO_ATTR(name) \
89 NILFS_INFO_ATTR(dev, name)
90 #define NILFS_DEV_RO_ATTR(name) \
91 NILFS_RO_ATTR(dev, name)
92 #define NILFS_DEV_RW_ATTR(name) \
93 NILFS_RW_ATTR(dev, name)
95 #define NILFS_SUPERBLOCK_RO_ATTR(name) \
96 NILFS_RO_ATTR(superblock, name)
97 #define NILFS_SUPERBLOCK_RW_ATTR(name) \
98 NILFS_RW_ATTR(superblock, name)
100 #define NILFS_SEGCTOR_INFO_ATTR(name) \
101 NILFS_INFO_ATTR(segctor, name)
102 #define NILFS_SEGCTOR_RO_ATTR(name) \
103 NILFS_RO_ATTR(segctor, name)
104 #define NILFS_SEGCTOR_RW_ATTR(name) \
105 NILFS_RW_ATTR(segctor, name)
107 #define NILFS_FEATURE_ATTR_LIST(name) \
108 (&nilfs_feature_attr_##name.attr)
109 #define NILFS_DEV_ATTR_LIST(name) \
110 (&nilfs_dev_attr_##name.attr)
111 #define NILFS_SUPERBLOCK_ATTR_LIST(name) \
112 (&nilfs_superblock_attr_##name.attr)
113 #define NILFS_SEGCTOR_ATTR_LIST(name) \
114 (&nilfs_segctor_attr_##name.attr)
116 #endif /* _NILFS_SYSFS_H */