From 8e22b29d3f3a1fff4387f767baae98d3216874fd Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Mon, 28 Apr 2008 10:54:37 -0700
Subject: [PATCH] kclient: drop leases before kill_anon_super

---
 src/kernel/mds_client.c | 18 ++++++++++++++++++
 src/kernel/mds_client.h |  1 +
 src/kernel/super.c      |  1 +
 3 files changed, 20 insertions(+)

diff --git a/src/kernel/mds_client.c b/src/kernel/mds_client.c
index d177bf7f1b23d..53526957130c8 100644
--- a/src/kernel/mds_client.c
+++ b/src/kernel/mds_client.c
@@ -848,6 +848,24 @@ bad:
 }
 
 
+/*
+ * drop all leases (and dentry refs) in preparation for umount
+ */
+void ceph_mdsc_drop_leases(struct ceph_mds_client *mdsc)
+{
+	int i;
+	
+	spin_lock(&mdsc->lock);
+	for (i = 0; i < mdsc->max_sessions; i++) {
+		struct ceph_mds_session *session = __get_session(mdsc, i);
+		if (!session)
+			continue;
+		spin_unlock(&mdsc->lock);
+		remove_session_leases(session);
+		spin_lock(&mdsc->lock);
+	}
+	spin_unlock(&mdsc->lock);
+}
 
 
 /* exported functions */
diff --git a/src/kernel/mds_client.h b/src/kernel/mds_client.h
index 63ec1f5786e7c..a865aa35fbf54 100644
--- a/src/kernel/mds_client.h
+++ b/src/kernel/mds_client.h
@@ -145,5 +145,6 @@ extern int __ceph_mdsc_send_cap(struct ceph_mds_client *mdsc,
 				struct ceph_mds_session *session,
 				struct ceph_inode_cap *cap,
 				int used, int wanted, int cancel_work);
+extern void ceph_mdsc_drop_leases(struct ceph_mds_client *mdsc);
 
 #endif
diff --git a/src/kernel/super.c b/src/kernel/super.c
index 3cb5897215087..cf4111beb66d5 100644
--- a/src/kernel/super.c
+++ b/src/kernel/super.c
@@ -535,6 +535,7 @@ static void ceph_kill_sb(struct super_block *s)
 {
 	struct ceph_client *client = ceph_sb_to_client(s);
 	dout(1, "kill_sb %p\n", s);
+	ceph_mdsc_drop_leases(&client->mdsc);
 	kill_anon_super(s);    /* will call put_super after sb is r/o */
 	ceph_destroy_client(client);
 }
-- 
2.39.5