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>

1 files changed, 19 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-fs-nilfs2 b/Documentation/ABI/testing/sysfs-fs-nilfs2
index 29dbc8f8bcbd..304ba84a973a 100644
--- a/Documentation/ABI/testing/sysfs-fs-nilfs2
+++ b/Documentation/ABI/testing/sysfs-fs-nilfs2
@@ -248,3 +248,22 @@ Contact:	"Vyacheslav Dubeyko" <slava@dubeyko.com>
 Description:
                 Describe content of /sys/fs/nilfs2/<device>/mounted_snapshots
                 group.
+
+What:           /sys/fs/nilfs2/<device>/mounted_snapshots/<id>/inodes_count
+Date:           April 2014
+Contact:        "Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+                Show number of inodes for snapshot.
+
+What:           /sys/fs/nilfs2/<device>/mounted_snapshots/<id>/blocks_count
+Date:           April 2014
+Contact:        "Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+                Show number of blocks for snapshot.
+
+What:           /sys/fs/nilfs2/<device>/mounted_snapshots/<id>/README
+Date:           April 2014
+Contact:        "Vyacheslav Dubeyko" <slava@dubeyko.com>
+Description:
+                Describe attributes of /sys/fs/nilfs2/<device>/mounted_snapshots/<id>
+                group.