1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
2 | /* |
3 | * Sysfs support declarations. |
4 | * |
5 | * Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation. |
6 | * Copyright (C) 2014 HGST, Inc., a Western Digital Company. |
7 | * |
8 | * Written by Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com> |
9 | */ |
10 | |
11 | #ifndef _NILFS_SYSFS_H |
12 | #define _NILFS_SYSFS_H |
13 | |
14 | #include <linux/sysfs.h> |
15 | |
16 | #define NILFS_ROOT_GROUP_NAME "nilfs2" |
17 | |
18 | /* |
19 | * struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects |
20 | * @sg_superblock_kobj: /sys/fs/<nilfs>/<device>/superblock |
21 | * @sg_superblock_kobj_unregister: completion state |
22 | * @sg_segctor_kobj: /sys/fs/<nilfs>/<device>/segctor |
23 | * @sg_segctor_kobj_unregister: completion state |
24 | * @sg_mounted_snapshots_kobj: /sys/fs/<nilfs>/<device>/mounted_snapshots |
25 | * @sg_mounted_snapshots_kobj_unregister: completion state |
26 | * @sg_checkpoints_kobj: /sys/fs/<nilfs>/<device>/checkpoints |
27 | * @sg_checkpoints_kobj_unregister: completion state |
28 | * @sg_segments_kobj: /sys/fs/<nilfs>/<device>/segments |
29 | * @sg_segments_kobj_unregister: completion state |
30 | */ |
31 | struct nilfs_sysfs_dev_subgroups { |
32 | /* /sys/fs/<nilfs>/<device>/superblock */ |
33 | struct kobject sg_superblock_kobj; |
34 | struct completion sg_superblock_kobj_unregister; |
35 | |
36 | /* /sys/fs/<nilfs>/<device>/segctor */ |
37 | struct kobject sg_segctor_kobj; |
38 | struct completion sg_segctor_kobj_unregister; |
39 | |
40 | /* /sys/fs/<nilfs>/<device>/mounted_snapshots */ |
41 | struct kobject sg_mounted_snapshots_kobj; |
42 | struct completion sg_mounted_snapshots_kobj_unregister; |
43 | |
44 | /* /sys/fs/<nilfs>/<device>/checkpoints */ |
45 | struct kobject sg_checkpoints_kobj; |
46 | struct completion sg_checkpoints_kobj_unregister; |
47 | |
48 | /* /sys/fs/<nilfs>/<device>/segments */ |
49 | struct kobject sg_segments_kobj; |
50 | struct completion sg_segments_kobj_unregister; |
51 | }; |
52 | |
53 | #define NILFS_COMMON_ATTR_STRUCT(name) \ |
54 | struct nilfs_##name##_attr { \ |
55 | struct attribute attr; \ |
56 | ssize_t (*show)(struct kobject *, struct attribute *, \ |
57 | char *); \ |
58 | ssize_t (*store)(struct kobject *, struct attribute *, \ |
59 | const char *, size_t); \ |
60 | } |
61 | |
62 | NILFS_COMMON_ATTR_STRUCT(feature); |
63 | |
64 | #define NILFS_DEV_ATTR_STRUCT(name) \ |
65 | struct nilfs_##name##_attr { \ |
66 | struct attribute attr; \ |
67 | ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \ |
68 | char *); \ |
69 | ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \ |
70 | const char *, size_t); \ |
71 | } |
72 | |
73 | NILFS_DEV_ATTR_STRUCT(dev); |
74 | NILFS_DEV_ATTR_STRUCT(segments); |
75 | NILFS_DEV_ATTR_STRUCT(mounted_snapshots); |
76 | NILFS_DEV_ATTR_STRUCT(checkpoints); |
77 | NILFS_DEV_ATTR_STRUCT(superblock); |
78 | NILFS_DEV_ATTR_STRUCT(segctor); |
79 | |
80 | #define NILFS_CP_ATTR_STRUCT(name) \ |
81 | struct nilfs_##name##_attr { \ |
82 | struct attribute attr; \ |
83 | ssize_t (*show)(struct nilfs_##name##_attr *, struct nilfs_root *, \ |
84 | char *); \ |
85 | ssize_t (*store)(struct nilfs_##name##_attr *, struct nilfs_root *, \ |
86 | const char *, size_t); \ |
87 | } |
88 | |
89 | NILFS_CP_ATTR_STRUCT(snapshot); |
90 | |
91 | #define NILFS_ATTR(type, name, mode, show, store) \ |
92 | static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \ |
93 | __ATTR(name, mode, show, store) |
94 | |
95 | #define NILFS_INFO_ATTR(type, name) \ |
96 | NILFS_ATTR(type, name, 0444, NULL, NULL) |
97 | #define NILFS_RO_ATTR(type, name) \ |
98 | NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL) |
99 | #define NILFS_RW_ATTR(type, name) \ |
100 | NILFS_ATTR(type, name, 0644, \ |
101 | nilfs_##type##_##name##_show, \ |
102 | nilfs_##type##_##name##_store) |
103 | |
104 | #define NILFS_FEATURE_INFO_ATTR(name) \ |
105 | NILFS_INFO_ATTR(feature, name) |
106 | #define NILFS_FEATURE_RO_ATTR(name) \ |
107 | NILFS_RO_ATTR(feature, name) |
108 | #define NILFS_FEATURE_RW_ATTR(name) \ |
109 | NILFS_RW_ATTR(feature, name) |
110 | |
111 | #define NILFS_DEV_INFO_ATTR(name) \ |
112 | NILFS_INFO_ATTR(dev, name) |
113 | #define NILFS_DEV_RO_ATTR(name) \ |
114 | NILFS_RO_ATTR(dev, name) |
115 | #define NILFS_DEV_RW_ATTR(name) \ |
116 | NILFS_RW_ATTR(dev, name) |
117 | |
118 | #define NILFS_SEGMENTS_RO_ATTR(name) \ |
119 | NILFS_RO_ATTR(segments, name) |
120 | #define NILFS_SEGMENTS_RW_ATTR(name) \ |
121 | NILFS_RW_ATTR(segs_info, name) |
122 | |
123 | #define NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(name) \ |
124 | NILFS_RO_ATTR(mounted_snapshots, name) |
125 | |
126 | #define NILFS_CHECKPOINTS_RO_ATTR(name) \ |
127 | NILFS_RO_ATTR(checkpoints, name) |
128 | #define NILFS_CHECKPOINTS_RW_ATTR(name) \ |
129 | NILFS_RW_ATTR(checkpoints, name) |
130 | |
131 | #define NILFS_SNAPSHOT_INFO_ATTR(name) \ |
132 | NILFS_INFO_ATTR(snapshot, name) |
133 | #define NILFS_SNAPSHOT_RO_ATTR(name) \ |
134 | NILFS_RO_ATTR(snapshot, name) |
135 | #define NILFS_SNAPSHOT_RW_ATTR(name) \ |
136 | NILFS_RW_ATTR(snapshot, name) |
137 | |
138 | #define NILFS_SUPERBLOCK_RO_ATTR(name) \ |
139 | NILFS_RO_ATTR(superblock, name) |
140 | #define NILFS_SUPERBLOCK_RW_ATTR(name) \ |
141 | NILFS_RW_ATTR(superblock, name) |
142 | |
143 | #define NILFS_SEGCTOR_INFO_ATTR(name) \ |
144 | NILFS_INFO_ATTR(segctor, name) |
145 | #define NILFS_SEGCTOR_RO_ATTR(name) \ |
146 | NILFS_RO_ATTR(segctor, name) |
147 | #define NILFS_SEGCTOR_RW_ATTR(name) \ |
148 | NILFS_RW_ATTR(segctor, name) |
149 | |
150 | #define NILFS_FEATURE_ATTR_LIST(name) \ |
151 | (&nilfs_feature_attr_##name.attr) |
152 | #define NILFS_DEV_ATTR_LIST(name) \ |
153 | (&nilfs_dev_attr_##name.attr) |
154 | #define NILFS_SEGMENTS_ATTR_LIST(name) \ |
155 | (&nilfs_segments_attr_##name.attr) |
156 | #define NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(name) \ |
157 | (&nilfs_mounted_snapshots_attr_##name.attr) |
158 | #define NILFS_CHECKPOINTS_ATTR_LIST(name) \ |
159 | (&nilfs_checkpoints_attr_##name.attr) |
160 | #define NILFS_SNAPSHOT_ATTR_LIST(name) \ |
161 | (&nilfs_snapshot_attr_##name.attr) |
162 | #define NILFS_SUPERBLOCK_ATTR_LIST(name) \ |
163 | (&nilfs_superblock_attr_##name.attr) |
164 | #define NILFS_SEGCTOR_ATTR_LIST(name) \ |
165 | (&nilfs_segctor_attr_##name.attr) |
166 | |
167 | #endif /* _NILFS_SYSFS_H */ |
168 | |