1 /* 2 * sysfs.h - sysfs support declarations. 3 * 4 * Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation. 5 * Copyright (C) 2014 HGST, Inc., a Western Digital Company. 6 * 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. 11 * 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. 16 * 17 * Written by Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com> 18 */ 19 20 #ifndef _NILFS_SYSFS_H 21 #define _NILFS_SYSFS_H 22 23 #include <linux/sysfs.h> 24 25 #define NILFS_ROOT_GROUP_NAME "nilfs2" 26 27 /* 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_mounted_snapshots_kobj: /sys/fs/<nilfs>/<device>/mounted_snapshots 34 * @sg_mounted_snapshots_kobj_unregister: completion state 35 * @sg_checkpoints_kobj: /sys/fs/<nilfs>/<device>/checkpoints 36 * @sg_checkpoints_kobj_unregister: completion state 37 * @sg_segments_kobj: /sys/fs/<nilfs>/<device>/segments 38 * @sg_segments_kobj_unregister: completion state 39 */ 40 struct nilfs_sysfs_dev_subgroups { 41 /* /sys/fs/<nilfs>/<device>/superblock */ 42 struct kobject sg_superblock_kobj; 43 struct completion sg_superblock_kobj_unregister; 44 45 /* /sys/fs/<nilfs>/<device>/segctor */ 46 struct kobject sg_segctor_kobj; 47 struct completion sg_segctor_kobj_unregister; 48 49 /* /sys/fs/<nilfs>/<device>/mounted_snapshots */ 50 struct kobject sg_mounted_snapshots_kobj; 51 struct completion sg_mounted_snapshots_kobj_unregister; 52 53 /* /sys/fs/<nilfs>/<device>/checkpoints */ 54 struct kobject sg_checkpoints_kobj; 55 struct completion sg_checkpoints_kobj_unregister; 56 57 /* /sys/fs/<nilfs>/<device>/segments */ 58 struct kobject sg_segments_kobj; 59 struct completion sg_segments_kobj_unregister; 60 }; 61 62 #define NILFS_COMMON_ATTR_STRUCT(name) \ 63 struct nilfs_##name##_attr { \ 64 struct attribute attr; \ 65 ssize_t (*show)(struct kobject *, struct attribute *, \ 66 char *); \ 67 ssize_t (*store)(struct kobject *, struct attribute *, \ 68 const char *, size_t); \ 69 } 70 71 NILFS_COMMON_ATTR_STRUCT(feature); 72 73 #define NILFS_DEV_ATTR_STRUCT(name) \ 74 struct nilfs_##name##_attr { \ 75 struct attribute attr; \ 76 ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \ 77 char *); \ 78 ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \ 79 const char *, size_t); \ 80 } 81 82 NILFS_DEV_ATTR_STRUCT(dev); 83 NILFS_DEV_ATTR_STRUCT(segments); 84 NILFS_DEV_ATTR_STRUCT(mounted_snapshots); 85 NILFS_DEV_ATTR_STRUCT(checkpoints); 86 NILFS_DEV_ATTR_STRUCT(superblock); 87 NILFS_DEV_ATTR_STRUCT(segctor); 88 89 #define NILFS_CP_ATTR_STRUCT(name) \ 90 struct nilfs_##name##_attr { \ 91 struct attribute attr; \ 92 ssize_t (*show)(struct nilfs_##name##_attr *, struct nilfs_root *, \ 93 char *); \ 94 ssize_t (*store)(struct nilfs_##name##_attr *, struct nilfs_root *, \ 95 const char *, size_t); \ 96 } 97 98 NILFS_CP_ATTR_STRUCT(snapshot); 99 100 #define NILFS_ATTR(type, name, mode, show, store) \ 101 static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \ 102 __ATTR(name, mode, show, store) 103 104 #define NILFS_INFO_ATTR(type, name) \ 105 NILFS_ATTR(type, name, 0444, NULL, NULL) 106 #define NILFS_RO_ATTR(type, name) \ 107 NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL) 108 #define NILFS_RW_ATTR(type, name) \ 109 NILFS_ATTR(type, name, 0644, \ 110 nilfs_##type##_##name##_show, \ 111 nilfs_##type##_##name##_store) 112 113 #define NILFS_FEATURE_INFO_ATTR(name) \ 114 NILFS_INFO_ATTR(feature, name) 115 #define NILFS_FEATURE_RO_ATTR(name) \ 116 NILFS_RO_ATTR(feature, name) 117 #define NILFS_FEATURE_RW_ATTR(name) \ 118 NILFS_RW_ATTR(feature, name) 119 120 #define NILFS_DEV_INFO_ATTR(name) \ 121 NILFS_INFO_ATTR(dev, name) 122 #define NILFS_DEV_RO_ATTR(name) \ 123 NILFS_RO_ATTR(dev, name) 124 #define NILFS_DEV_RW_ATTR(name) \ 125 NILFS_RW_ATTR(dev, name) 126 127 #define NILFS_SEGMENTS_RO_ATTR(name) \ 128 NILFS_RO_ATTR(segments, name) 129 #define NILFS_SEGMENTS_RW_ATTR(name) \ 130 NILFS_RW_ATTR(segs_info, name) 131 132 #define NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(name) \ 133 NILFS_RO_ATTR(mounted_snapshots, name) 134 135 #define NILFS_CHECKPOINTS_RO_ATTR(name) \ 136 NILFS_RO_ATTR(checkpoints, name) 137 #define NILFS_CHECKPOINTS_RW_ATTR(name) \ 138 NILFS_RW_ATTR(checkpoints, name) 139 140 #define NILFS_SNAPSHOT_INFO_ATTR(name) \ 141 NILFS_INFO_ATTR(snapshot, name) 142 #define NILFS_SNAPSHOT_RO_ATTR(name) \ 143 NILFS_RO_ATTR(snapshot, name) 144 #define NILFS_SNAPSHOT_RW_ATTR(name) \ 145 NILFS_RW_ATTR(snapshot, name) 146 147 #define NILFS_SUPERBLOCK_RO_ATTR(name) \ 148 NILFS_RO_ATTR(superblock, name) 149 #define NILFS_SUPERBLOCK_RW_ATTR(name) \ 150 NILFS_RW_ATTR(superblock, name) 151 152 #define NILFS_SEGCTOR_INFO_ATTR(name) \ 153 NILFS_INFO_ATTR(segctor, name) 154 #define NILFS_SEGCTOR_RO_ATTR(name) \ 155 NILFS_RO_ATTR(segctor, name) 156 #define NILFS_SEGCTOR_RW_ATTR(name) \ 157 NILFS_RW_ATTR(segctor, name) 158 159 #define NILFS_FEATURE_ATTR_LIST(name) \ 160 (&nilfs_feature_attr_##name.attr) 161 #define NILFS_DEV_ATTR_LIST(name) \ 162 (&nilfs_dev_attr_##name.attr) 163 #define NILFS_SEGMENTS_ATTR_LIST(name) \ 164 (&nilfs_segments_attr_##name.attr) 165 #define NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(name) \ 166 (&nilfs_mounted_snapshots_attr_##name.attr) 167 #define NILFS_CHECKPOINTS_ATTR_LIST(name) \ 168 (&nilfs_checkpoints_attr_##name.attr) 169 #define NILFS_SNAPSHOT_ATTR_LIST(name) \ 170 (&nilfs_snapshot_attr_##name.attr) 171 #define NILFS_SUPERBLOCK_ATTR_LIST(name) \ 172 (&nilfs_superblock_attr_##name.attr) 173 #define NILFS_SEGCTOR_ATTR_LIST(name) \ 174 (&nilfs_segctor_attr_##name.attr) 175 176 #endif /* _NILFS_SYSFS_H */ 177