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-rw-r--r--fs/kernfs/dir.c9
-rw-r--r--fs/kernfs/kernfs-internal.h18
2 files changed, 27 insertions, 0 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index e6d9772ddb4c..61a8edc4ba8b 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -971,6 +971,15 @@ void kernfs_destroy_root(struct kernfs_root *root)
}
/**
+ * kernfs_root_to_node - return the kernfs_node associated with a kernfs_root
+ * @root: root to use to lookup
+ */
+struct kernfs_node *kernfs_root_to_node(struct kernfs_root *root)
+{
+ return root->kn;
+}
+
+/**
* kernfs_create_dir_ns - create a directory
* @parent: parent in which to create a new directory
* @name: name of the new directory
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index fc3b32f82a60..eeaa779b929c 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -31,6 +31,24 @@ struct kernfs_iattrs {
atomic_t user_xattr_size;
};
+struct kernfs_root {
+ /* published fields */
+ struct kernfs_node *kn;
+ unsigned int flags; /* KERNFS_ROOT_* flags */
+
+ /* private fields, do not use outside kernfs proper */
+ struct idr ino_idr;
+ u32 last_id_lowbits;
+ u32 id_highbits;
+ struct kernfs_syscall_ops *syscall_ops;
+
+ /* list of kernfs_super_info of this root, protected by kernfs_rwsem */
+ struct list_head supers;
+
+ wait_queue_head_t deactivate_waitq;
+ struct rw_semaphore kernfs_rwsem;
+};
+
/* +1 to avoid triggering overflow warning when negating it */
#define KN_DEACTIVATED_BIAS (INT_MIN + 1)