nilfs2: add /sys/fs/nilfs2/<device>/mounted_snapshots/<snapshot> group
This patch adds creation of <snapshot> group for every mounted
snapshot in /sys/fs/nilfs2/<device>/mounted_snapshots group.
The group contains details about mounted snapshot:
(1) inodes_count - show number of inodes for snapshot.
(2) blocks_count - show number of blocks for snapshot.
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>
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h
index 7fe8223..d01ead1 100644
--- a/fs/nilfs2/the_nilfs.h
+++ b/fs/nilfs2/the_nilfs.h
@@ -243,6 +243,8 @@
* @ifile: inode file
* @inodes_count: number of inodes
* @blocks_count: number of blocks
+ * @snapshot_kobj: /sys/fs/<nilfs>/<device>/mounted_snapshots/<snapshot>
+ * @snapshot_kobj_unregister: completion state for kernel object
*/
struct nilfs_root {
__u64 cno;
@@ -254,6 +256,10 @@
atomic64_t inodes_count;
atomic64_t blocks_count;
+
+ /* /sys/fs/<nilfs>/<device>/mounted_snapshots/<snapshot> */
+ struct kobject snapshot_kobj;
+ struct completion snapshot_kobj_unregister;
};
/* Special checkpoint number */
