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 */