1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * sysfs.h - 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