fuse: add fuse_conn->release()

Add fuse_conn->release() so that fuse_conn can be embedded in other
structures.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

2 files changed, 10 insertions, 1 deletions

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index eb488d48b833..5e64b815a5a1 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -465,6 +465,9 @@ struct fuse_conn {
 
         /** Version counter for attribute changes */
         u64 attr_version;
+
+        /** Called on final put */
+        void (*release)(struct fuse_conn *);
 };
 
 static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 6c9fa03aa367..47c96fdca1ac 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -533,7 +533,7 @@ void fuse_conn_put(struct fuse_conn *fc)
                         fuse_request_free(fc->destroy_req);
                 mutex_destroy(&fc->inst_mutex);
                 bdi_destroy(&fc->bdi);
-                kfree(fc);
+                fc->release(fc);
         }
 }
 
@@ -789,6 +789,11 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
         fuse_request_send_background(fc, req);
 }
 
+static void fuse_free_conn(struct fuse_conn *fc)
+{
+        kfree(fc);
+}
+
 static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 {
         struct fuse_conn *fc;
@@ -837,6 +842,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
                 return err;
         }
 
+        fc->release = fuse_free_conn;
         fc->flags = d.flags;
         fc->user_id = d.user_id;
         fc->group_id = d.group_id;