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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_H12#define _NILFS_SYSFS_H13 14#include <linux/sysfs.h>15 16#define NILFS_ROOT_GROUP_NAME "nilfs2"17 18/*19 * struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects20 * @sg_superblock_kobj: /sys/fs/<nilfs>/<device>/superblock21 * @sg_superblock_kobj_unregister: completion state22 * @sg_segctor_kobj: /sys/fs/<nilfs>/<device>/segctor23 * @sg_segctor_kobj_unregister: completion state24 * @sg_mounted_snapshots_kobj: /sys/fs/<nilfs>/<device>/mounted_snapshots25 * @sg_mounted_snapshots_kobj_unregister: completion state26 * @sg_checkpoints_kobj: /sys/fs/<nilfs>/<device>/checkpoints27 * @sg_checkpoints_kobj_unregister: completion state28 * @sg_segments_kobj: /sys/fs/<nilfs>/<device>/segments29 * @sg_segments_kobj_unregister: completion state30 */31struct 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) \54struct 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 62NILFS_COMMON_ATTR_STRUCT(feature);63 64#define NILFS_DEV_ATTR_STRUCT(name) \65struct 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 73NILFS_DEV_ATTR_STRUCT(dev);74NILFS_DEV_ATTR_STRUCT(segments);75NILFS_DEV_ATTR_STRUCT(mounted_snapshots);76NILFS_DEV_ATTR_STRUCT(checkpoints);77NILFS_DEV_ATTR_STRUCT(superblock);78NILFS_DEV_ATTR_STRUCT(segctor);79 80#define NILFS_CP_ATTR_STRUCT(name) \81struct 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 89NILFS_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