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02a0ba1c60
This patch adds creation of /sys/fs/nilfs2/<device>/checkpoints group. The checkpoints group contains attributes that describe details about volume's checkpoints: (1) checkpoints_number - show number of checkpoints on volume. (2) snapshots_number - show number of snapshots on volume. (3) last_seg_checkpoint - show checkpoint number of the latest segment. (4) next_checkpoint - show next checkpoint number. Signed-off-by: Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com> Cc: Vyacheslav Dubeyko <slava@dubeyko.com> Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Michael L. Semon <mlsemon35@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
145 lines
4.6 KiB
C
145 lines
4.6 KiB
C
/*
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* sysfs.h - sysfs support declarations.
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*
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* Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation.
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* Copyright (C) 2014 HGST, Inc., a Western Digital Company.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com>
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*/
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#ifndef _NILFS_SYSFS_H
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#define _NILFS_SYSFS_H
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#include <linux/sysfs.h>
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#define NILFS_ROOT_GROUP_NAME "nilfs2"
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/*
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* struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects
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* @sg_superblock_kobj: /sys/fs/<nilfs>/<device>/superblock
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* @sg_superblock_kobj_unregister: completion state
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* @sg_segctor_kobj: /sys/fs/<nilfs>/<device>/segctor
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* @sg_segctor_kobj_unregister: completion state
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* @sg_checkpoints_kobj: /sys/fs/<nilfs>/<device>/checkpoints
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* @sg_checkpoints_kobj_unregister: completion state
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* @sg_segments_kobj: /sys/fs/<nilfs>/<device>/segments
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* @sg_segments_kobj_unregister: completion state
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*/
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struct nilfs_sysfs_dev_subgroups {
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/* /sys/fs/<nilfs>/<device>/superblock */
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struct kobject sg_superblock_kobj;
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struct completion sg_superblock_kobj_unregister;
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/* /sys/fs/<nilfs>/<device>/segctor */
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struct kobject sg_segctor_kobj;
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struct completion sg_segctor_kobj_unregister;
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/* /sys/fs/<nilfs>/<device>/checkpoints */
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struct kobject sg_checkpoints_kobj;
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struct completion sg_checkpoints_kobj_unregister;
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/* /sys/fs/<nilfs>/<device>/segments */
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struct kobject sg_segments_kobj;
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struct completion sg_segments_kobj_unregister;
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};
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#define NILFS_COMMON_ATTR_STRUCT(name) \
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struct nilfs_##name##_attr { \
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struct attribute attr; \
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ssize_t (*show)(struct kobject *, struct attribute *, \
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char *); \
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ssize_t (*store)(struct kobject *, struct attribute *, \
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const char *, size_t); \
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};
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NILFS_COMMON_ATTR_STRUCT(feature);
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#define NILFS_DEV_ATTR_STRUCT(name) \
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struct nilfs_##name##_attr { \
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struct attribute attr; \
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ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \
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char *); \
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ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \
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const char *, size_t); \
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};
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NILFS_DEV_ATTR_STRUCT(dev);
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NILFS_DEV_ATTR_STRUCT(segments);
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NILFS_DEV_ATTR_STRUCT(checkpoints);
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NILFS_DEV_ATTR_STRUCT(superblock);
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NILFS_DEV_ATTR_STRUCT(segctor);
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#define NILFS_ATTR(type, name, mode, show, store) \
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static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \
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__ATTR(name, mode, show, store)
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#define NILFS_INFO_ATTR(type, name) \
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NILFS_ATTR(type, name, 0444, NULL, NULL)
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#define NILFS_RO_ATTR(type, name) \
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NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL)
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#define NILFS_RW_ATTR(type, name) \
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NILFS_ATTR(type, name, 0644, \
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nilfs_##type##_##name##_show, \
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nilfs_##type##_##name##_store)
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#define NILFS_FEATURE_INFO_ATTR(name) \
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NILFS_INFO_ATTR(feature, name)
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#define NILFS_FEATURE_RO_ATTR(name) \
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NILFS_RO_ATTR(feature, name)
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#define NILFS_FEATURE_RW_ATTR(name) \
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NILFS_RW_ATTR(feature, name)
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#define NILFS_DEV_INFO_ATTR(name) \
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NILFS_INFO_ATTR(dev, name)
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#define NILFS_DEV_RO_ATTR(name) \
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NILFS_RO_ATTR(dev, name)
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#define NILFS_DEV_RW_ATTR(name) \
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NILFS_RW_ATTR(dev, name)
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#define NILFS_SEGMENTS_RO_ATTR(name) \
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NILFS_RO_ATTR(segments, name)
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#define NILFS_SEGMENTS_RW_ATTR(name) \
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NILFS_RW_ATTR(segs_info, name)
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#define NILFS_CHECKPOINTS_RO_ATTR(name) \
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NILFS_RO_ATTR(checkpoints, name)
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#define NILFS_CHECKPOINTS_RW_ATTR(name) \
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NILFS_RW_ATTR(checkpoints, name)
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#define NILFS_SUPERBLOCK_RO_ATTR(name) \
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NILFS_RO_ATTR(superblock, name)
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#define NILFS_SUPERBLOCK_RW_ATTR(name) \
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NILFS_RW_ATTR(superblock, name)
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#define NILFS_SEGCTOR_INFO_ATTR(name) \
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NILFS_INFO_ATTR(segctor, name)
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#define NILFS_SEGCTOR_RO_ATTR(name) \
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NILFS_RO_ATTR(segctor, name)
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#define NILFS_SEGCTOR_RW_ATTR(name) \
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NILFS_RW_ATTR(segctor, name)
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#define NILFS_FEATURE_ATTR_LIST(name) \
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(&nilfs_feature_attr_##name.attr)
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#define NILFS_DEV_ATTR_LIST(name) \
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(&nilfs_dev_attr_##name.attr)
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#define NILFS_SEGMENTS_ATTR_LIST(name) \
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(&nilfs_segments_attr_##name.attr)
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#define NILFS_CHECKPOINTS_ATTR_LIST(name) \
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(&nilfs_checkpoints_attr_##name.attr)
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#define NILFS_SUPERBLOCK_ATTR_LIST(name) \
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(&nilfs_superblock_attr_##name.attr)
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#define NILFS_SEGCTOR_ATTR_LIST(name) \
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(&nilfs_segctor_attr_##name.attr)
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#endif /* _NILFS_SYSFS_H */
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