nfsd4: make sure sequence flags are set after destroy_session

If this loses any backchannel, make sure we have a chance to notice that
and set the sequence flags.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

3 files changed, 8 insertions, 2 deletions

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index d32f49d6ca2c..cb002dce5630 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -589,6 +589,12 @@ void nfsd4_probe_callback(struct nfs4_client *clp)
         do_probe_callback(clp);
 }
 
+void nfsd4_probe_callback_sync(struct nfs4_client *clp)
+{
+        nfsd4_probe_callback(clp);
+        flush_workqueue(callback_wq);
+}
+
 void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *conn)
 {
         clp->cl_cb_state = NFSD4_CB_UNKNOWN;
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index b24f19d4187a..00a50b8ac878 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1686,8 +1686,7 @@ nfsd4_destroy_session(struct svc_rqst *r,
         spin_unlock(&client_lock);
 
         nfs4_lock_state();
-        /* wait for callbacks */
-        nfsd4_shutdown_callback(ses->se_client);
+        nfsd4_probe_callback_sync(ses->se_client);
         nfs4_unlock_state();
 
         nfsd4_del_conns(ses);
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 32ff615c36f4..4e5bdfd9169c 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -464,6 +464,7 @@ extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
 extern void nfs4_free_stateowner(struct kref *kref);
 extern int set_callback_cred(void);
 extern void nfsd4_probe_callback(struct nfs4_client *clp);
+extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
 extern void nfsd4_do_callback_rpc(struct work_struct *);
 extern void nfsd4_cb_recall(struct nfs4_delegation *dp);