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
33 * @sg_segments_kobj: /sys/fs/<nilfs>/<device>/segments
34 * @sg_segments_kobj_unregister: completion state
36 struct nilfs_sysfs_dev_subgroups {
37 /* /sys/fs/<nilfs>/<device>/superblock */
38 struct kobject sg_superblock_kobj;
39 struct completion sg_superblock_kobj_unregister;
41 /* /sys/fs/<nilfs>/<device>/segctor */
42 struct kobject sg_segctor_kobj;
43 struct completion sg_segctor_kobj_unregister;
45 /* /sys/fs/<nilfs>/<device>/segments */
46 struct kobject sg_segments_kobj;
47 struct completion sg_segments_kobj_unregister;
50 #define NILFS_COMMON_ATTR_STRUCT(name) \
51 struct nilfs_##name##_attr { \
52 struct attribute attr; \
53 ssize_t (*show)(struct kobject *, struct attribute *, \
55 ssize_t (*store)(struct kobject *, struct attribute *, \
56 const char *, size_t); \
59 NILFS_COMMON_ATTR_STRUCT(feature);
61 #define NILFS_DEV_ATTR_STRUCT(name) \
62 struct nilfs_##name##_attr { \
63 struct attribute attr; \
64 ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \
66 ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \
67 const char *, size_t); \
70 NILFS_DEV_ATTR_STRUCT(dev);
71 NILFS_DEV_ATTR_STRUCT(segments);
72 NILFS_DEV_ATTR_STRUCT(superblock);
73 NILFS_DEV_ATTR_STRUCT(segctor);
75 #define NILFS_ATTR(type, name, mode, show, store) \
76 static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \
77 __ATTR(name, mode, show, store)
79 #define NILFS_INFO_ATTR(type, name) \
80 NILFS_ATTR(type, name, 0444, NULL, NULL)
81 #define NILFS_RO_ATTR(type, name) \
82 NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL)
83 #define NILFS_RW_ATTR(type, name) \
84 NILFS_ATTR(type, name, 0644, \
85 nilfs_##type##_##name##_show, \
86 nilfs_##type##_##name##_store)
88 #define NILFS_FEATURE_INFO_ATTR(name) \
89 NILFS_INFO_ATTR(feature, name)
90 #define NILFS_FEATURE_RO_ATTR(name) \
91 NILFS_RO_ATTR(feature, name)
92 #define NILFS_FEATURE_RW_ATTR(name) \
93 NILFS_RW_ATTR(feature, name)
95 #define NILFS_DEV_INFO_ATTR(name) \
96 NILFS_INFO_ATTR(dev, name)
97 #define NILFS_DEV_RO_ATTR(name) \
98 NILFS_RO_ATTR(dev, name)
99 #define NILFS_DEV_RW_ATTR(name) \
100 NILFS_RW_ATTR(dev, name)
102 #define NILFS_SEGMENTS_RO_ATTR(name) \
103 NILFS_RO_ATTR(segments, name)
104 #define NILFS_SEGMENTS_RW_ATTR(name) \
105 NILFS_RW_ATTR(segs_info, name)
107 #define NILFS_SUPERBLOCK_RO_ATTR(name) \
108 NILFS_RO_ATTR(superblock, name)
109 #define NILFS_SUPERBLOCK_RW_ATTR(name) \
110 NILFS_RW_ATTR(superblock, name)
112 #define NILFS_SEGCTOR_INFO_ATTR(name) \
113 NILFS_INFO_ATTR(segctor, name)
114 #define NILFS_SEGCTOR_RO_ATTR(name) \
115 NILFS_RO_ATTR(segctor, name)
116 #define NILFS_SEGCTOR_RW_ATTR(name) \
117 NILFS_RW_ATTR(segctor, name)
119 #define NILFS_FEATURE_ATTR_LIST(name) \
120 (&nilfs_feature_attr_##name.attr)
121 #define NILFS_DEV_ATTR_LIST(name) \
122 (&nilfs_dev_attr_##name.attr)
123 #define NILFS_SEGMENTS_ATTR_LIST(name) \
124 (&nilfs_segments_attr_##name.attr)
125 #define NILFS_SUPERBLOCK_ATTR_LIST(name) \
126 (&nilfs_superblock_attr_##name.attr)
127 #define NILFS_SEGCTOR_ATTR_LIST(name) \
128 (&nilfs_segctor_attr_##name.attr)
130 #endif /* _NILFS_SYSFS_H */