On Thu, 2025-01-30 at 11:01 -0800, Dai Ngo wrote:
> If nfs4_client is in courtesy state then there is no point to retry
> 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 nnfsd4_run_cb_work to skip the RPC call if
> nfs4_client is in courtesy state.
>
> Signed-off-by: Dai Ngo <dai.ngo@xxxxxxxxxx>
> ---
> fs/nfsd/nfs4callback.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
> index 50e468bdb8d4..cf6d29828f4e 100644
> --- a/fs/nfsd/nfs4callback.c
> +++ b/fs/nfsd/nfs4callback.c
> @@ -1583,8 +1583,11 @@ nfsd4_run_cb_work(struct work_struct *work)
> 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;
> }
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
