6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dai Ngo dai.ngo@oracle.com
commit 036ac2778f7b28885814c6fbc07e156ad1624d03 upstream.
If nfs4_client is in courtesy state then there is no point to send the callback. This causes nfsd4_shutdown_callback to hang since cl_cb_inflight is not 0. This hang lasts about 15 minutes until TCP notifies NFSD that the connection was dropped.
This patch modifies nfsd4_run_cb_work to skip the RPC call if nfs4_client is in courtesy state.
Signed-off-by: Dai Ngo dai.ngo@oracle.com Fixes: 66af25799940 ("NFSD: add courteous server support for thread with only delegation") Cc: stable@vger.kernel.org Reviewed-by: Jeff Layton jlayton@kernel.org Signed-off-by: Chuck Lever chuck.lever@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/nfsd/nfs4callback.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
--- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -1410,8 +1410,11 @@ nfsd4_run_cb_work(struct work_struct *wo nfsd4_process_cb_update(cb);
clnt = clp->cl_cb_client; - if (!clnt) { - /* Callback channel broken, or client killed; give up: */ + if (!clnt || clp->cl_state == NFSD4_COURTESY) { + /* + * Callback channel broken, client killed or + * nfs4_client in courtesy state; give up. + */ nfsd41_destroy_cb(cb); return; }