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| author | Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com> | 2014-08-08 14:20:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-08 15:57:20 -0700 |
| commit | caa05d49dfd7fe04820ba8b7e424343d5426a7f3 (patch) | |
| tree | db3d3a85b97d9cbedf982e323771c0f1ad634b5f /fs/nilfs2/sysfs.h | |
| parent | da7141fb78db915680616e15677539fc8140cf53 (diff) | |
| download | linux-caa05d49dfd7fe04820ba8b7e424343d5426a7f3.tar.bz2 | |
nilfs2: add /sys/fs/nilfs2/<device>/superblock group
This patch adds creation of /sys/fs/nilfs2/<device>/superblock
group.
The superblock group contains attributes that describe
superblock's details:
(1) sb_write_time - show previous write time of super block in
human-readable format.
(2) sb_write_time_secs - show previous write time of super block
in seconds.
(3) sb_write_count - show write count of super block.
(4) sb_update_frequency - show/set interval of periodical update
of superblock (in seconds). You can set preferable frequency of
superblock update by command:
echo <value> > /sys/fs/nilfs2/<device>/superblock/sb_update_frequency
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>
Diffstat (limited to 'fs/nilfs2/sysfs.h')
| -rw-r--r-- | fs/nilfs2/sysfs.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/nilfs2/sysfs.h b/fs/nilfs2/sysfs.h index 2353b28c2796..1d76af59238c 100644 --- a/fs/nilfs2/sysfs.h +++ b/fs/nilfs2/sysfs.h @@ -24,6 +24,17 @@ #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 + */ +struct nilfs_sysfs_dev_subgroups { + /* /sys/fs/<nilfs>/<device>/superblock */ + struct kobject sg_superblock_kobj; + struct completion sg_superblock_kobj_unregister; +}; + #define NILFS_COMMON_ATTR_STRUCT(name) \ struct nilfs_##name##_attr { \ struct attribute attr; \ @@ -45,6 +56,7 @@ struct nilfs_##name##_attr { \ }; NILFS_DEV_ATTR_STRUCT(dev); +NILFS_DEV_ATTR_STRUCT(superblock); #define NILFS_ATTR(type, name, mode, show, store) \ static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \ @@ -73,9 +85,16 @@ NILFS_DEV_ATTR_STRUCT(dev); #define NILFS_DEV_RW_ATTR(name) \ NILFS_RW_ATTR(dev, 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_FEATURE_ATTR_LIST(name) \ (&nilfs_feature_attr_##name.attr) #define NILFS_DEV_ATTR_LIST(name) \ (&nilfs_dev_attr_##name.attr) +#define NILFS_SUPERBLOCK_ATTR_LIST(name) \ + (&nilfs_superblock_attr_##name.attr) #endif /* _NILFS_SYSFS_H */ |