nfsd: probe the back channel on new connections
Initiate a CB probe when a new connection with the correct direction is added
to a session (IFF backchannel is marked as down). Without this a
BIND_CONN_TO_SESSION has no effect on the internal backchannel state, which
causes the server to reply to every SEQUENCE op with the
SEQ4_STATUS_CB_PATH_DOWN flag set until DESTROY_SESSION.
Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 94effd5..8b80a10 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -862,6 +862,11 @@
if (ret)
/* oops; xprt is already down: */
nfsd4_conn_lost(&conn->cn_xpt_user);
+ if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN &&
+ dir & NFS4_CDFC4_BACK) {
+ /* callback channel may be back up */
+ nfsd4_probe_callback(ses->se_client);
+ }
return nfs_ok;
}