[PATCH 4/5] FUSE: add fuse_conn->release()

[Tejun Heo <tj@kernel.org>]

Add fuse_conn->release() so that fuse_conn can be embedded in other
structures.  If unspecified, the original action - kfree() - is done.

Signed-off-by: Tejun Heo <tj@kernel.org>
---
 fs/fuse/fuse_i.h |    3 +++
 fs/fuse/inode.c  |    6 +++++-
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 4795264..67f33e8 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.  If implemented, should free the connection */
+	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 8d092ea..b99bb95 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -543,7 +543,11 @@ 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);
+
+		if (fc->release)
+			fc->release(fc);
+		else
+			kfree(fc);
 	}
 }
 EXPORT_SYMBOL_GPL(fuse_conn_put);
-- 
1.5.4.5