commit a2ecb791a9d6e71a2d37d66034475a92ebc7e02c
author Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com> Fri Aug 08 14:20:50 2014 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Fri Aug 08 15:57:21 2014 -0700
tree f9f5c2d3bd24ef0105786d73561bbcafaca3fb25
parent 02a0ba1c60c2ad532322089a60256c8b0f46678c

nilfs2: add /sys/fs/nilfs2/<device>/mounted_snapshots group

This patch adds creation of /sys/fs/nilfs2/<device>/mounted_snapshots
group.

The mounted_snapshots group contains group for every
mounted 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>

fs/nilfs2/sysfs.h

diff --git a/fs/nilfs2/sysfs.h b/fs/nilfs2/sysfs.h
index 62f0a0d..4e84e23 100644
--- a/fs/nilfs2/sysfs.h
+++ b/fs/nilfs2/sysfs.h
@@ -30,6 +30,8 @@
  * @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
@@ -44,6 +46,10 @@
 	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;
@@ -75,6 +81,7 @@
 
 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);
@@ -111,6 +118,9 @@
 #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) \
@@ -134,6 +144,8 @@
 	(&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_SUPERBLOCK_ATTR_LIST(name) \