/* * sysfs.h - sysfs support declarations. * * Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation. * Copyright (C) 2014 HGST, Inc., a Western Digital Company. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Written by Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com> */ #ifndef _NILFS_SYSFS_H #define _NILFS_SYSFS_H #include <linux/sysfs.h> #define NILFS_ROOT_GROUP_NAME "nilfs2" /* * struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects * @sg_superblock_kobj: /sys/fs/<nilfs>/<device>/superblock * @sg_superblock_kobj_unregister: completion state * @sg_segctor_kobj: /sys/fs/<nilfs>/<device>/segctor * @sg_segctor_kobj_unregister: completion state * @sg_mounted_snapshots_kobj: /sys/fs/<nilfs>/<device>/mounted_snapshots * @sg_mounted_snapshots_kobj_unregister: completion state * @sg_checkpoints_kobj: /sys/fs/<nilfs>/<device>/checkpoints * @sg_checkpoints_kobj_unregister: completion state * @sg_segments_kobj: /sys/fs/<nilfs>/<device>/segments * @sg_segments_kobj_unregister: completion state */ struct nilfs_sysfs_dev_subgroups { /* /sys/fs/<nilfs>/<device>/superblock */ struct kobject sg_superblock_kobj; struct completion sg_superblock_kobj_unregister; /* /sys/fs/<nilfs>/<device>/segctor */ struct kobject sg_segctor_kobj; struct completion sg_segctor_kobj_unregister; /* /sys/fs/<nilfs>/<device>/mounted_snapshots */ struct kobject sg_mounted_snapshots_kobj; struct completion sg_mounted_snapshots_kobj_unregister; /* /sys/fs/<nilfs>/<device>/checkpoints */ struct kobject sg_checkpoints_kobj; struct completion sg_checkpoints_kobj_unregister; /* /sys/fs/<nilfs>/<device>/segments */ struct kobject sg_segments_kobj; struct completion sg_segments_kobj_unregister; }; #define NILFS_COMMON_ATTR_STRUCT(name) \ struct nilfs_##name##_attr { \ struct attribute attr; \ ssize_t (*show)(struct kobject *, struct attribute *, \ char *); \ ssize_t (*store)(struct kobject *, struct attribute *, \ const char *, size_t); \ } NILFS_COMMON_ATTR_STRUCT(feature); #define NILFS_DEV_ATTR_STRUCT(name) \ struct nilfs_##name##_attr { \ struct attribute attr; \ ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \ char *); \ ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \ const char *, size_t); \ } NILFS_DEV_ATTR_STRUCT(dev); NILFS_DEV_ATTR_STRUCT(segments); NILFS_DEV_ATTR_STRUCT(mounted_snapshots); NILFS_DEV_ATTR_STRUCT(checkpoints); NILFS_DEV_ATTR_STRUCT(superblock); NILFS_DEV_ATTR_STRUCT(segctor); #define NILFS_CP_ATTR_STRUCT(name) \ struct nilfs_##name##_attr { \ struct attribute attr; \ ssize_t (*show)(struct nilfs_##name##_attr *, struct nilfs_root *, \ char *); \ ssize_t (*store)(struct nilfs_##name##_attr *, struct nilfs_root *, \ const char *, size_t); \ } NILFS_CP_ATTR_STRUCT(snapshot); #define NILFS_ATTR(type, name, mode, show, store) \ static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \ __ATTR(name, mode, show, store) #define NILFS_INFO_ATTR(type, name) \ NILFS_ATTR(type, name, 0444, NULL, NULL) #define NILFS_RO_ATTR(type, name) \ NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL) #define NILFS_RW_ATTR(type, name) \ NILFS_ATTR(type, name, 0644, \ nilfs_##type##_##name##_show, \ nilfs_##type##_##name##_store) #define NILFS_FEATURE_INFO_ATTR(name) \ NILFS_INFO_ATTR(feature, name) #define NILFS_FEATURE_RO_ATTR(name) \ NILFS_RO_ATTR(feature, name) #define NILFS_FEATURE_RW_ATTR(name) \ NILFS_RW_ATTR(feature, name) #define NILFS_DEV_INFO_ATTR(name) \ NILFS_INFO_ATTR(dev, name) #define NILFS_DEV_RO_ATTR(name) \ NILFS_RO_ATTR(dev, name) #define NILFS_DEV_RW_ATTR(name) \ NILFS_RW_ATTR(dev, name) #define NILFS_SEGMENTS_RO_ATTR(name) \ NILFS_RO_ATTR(segments, name) #define NILFS_SEGMENTS_RW_ATTR(name) \ NILFS_RW_ATTR(segs_info, name) #define NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(name) \ NILFS_RO_ATTR(mounted_snapshots, name) #define NILFS_CHECKPOINTS_RO_ATTR(name) \ NILFS_RO_ATTR(checkpoints, name) #define NILFS_CHECKPOINTS_RW_ATTR(name) \ NILFS_RW_ATTR(checkpoints, name) #define NILFS_SNAPSHOT_INFO_ATTR(name) \ NILFS_INFO_ATTR(snapshot, name) #define NILFS_SNAPSHOT_RO_ATTR(name) \ NILFS_RO_ATTR(snapshot, name) #define NILFS_SNAPSHOT_RW_ATTR(name) \ NILFS_RW_ATTR(snapshot, name) #define NILFS_SUPERBLOCK_RO_ATTR(name) \ NILFS_RO_ATTR(superblock, name) #define NILFS_SUPERBLOCK_RW_ATTR(name) \ NILFS_RW_ATTR(superblock, name) #define NILFS_SEGCTOR_INFO_ATTR(name) \ NILFS_INFO_ATTR(segctor, name) #define NILFS_SEGCTOR_RO_ATTR(name) \ NILFS_RO_ATTR(segctor, name) #define NILFS_SEGCTOR_RW_ATTR(name) \ NILFS_RW_ATTR(segctor, name) #define NILFS_FEATURE_ATTR_LIST(name) \ (&nilfs_feature_attr_##name.attr) #define NILFS_DEV_ATTR_LIST(name) \ (&nilfs_dev_attr_##name.attr) #define NILFS_SEGMENTS_ATTR_LIST(name) \ (&nilfs_segments_attr_##name.attr) #define NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(name) \ (&nilfs_mounted_snapshots_attr_##name.attr) #define NILFS_CHECKPOINTS_ATTR_LIST(name) \ (&nilfs_checkpoints_attr_##name.attr) #define NILFS_SNAPSHOT_ATTR_LIST(name) \ (&nilfs_snapshot_attr_##name.attr) #define NILFS_SUPERBLOCK_ATTR_LIST(name) \ (&nilfs_superblock_attr_##name.attr) #define NILFS_SEGCTOR_ATTR_LIST(name) \ (&nilfs_segctor_attr_##name.attr) #endif /* _NILFS_SYSFS_H */