ksmbd: smbd: change the default maximum read/write, receive size

Due to restriction that cannot handle multiple
buffer descriptor structures, decrease the maximum
read/write size for Windows clients.

And set the maximum fragmented receive size
in consideration of the receive queue size.

Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c
index f0b17da..86fd645 100644 (file)
--- a/fs/ksmbd/transport_rdma.c
+++ b/fs/ksmbd/transport_rdma.c
@@ -80,7 +80,7 @@ static int smb_direct_max_fragmented_recv_size = 1024 * 1024;
 /*  The maximum single-message size which can be received */
 static int smb_direct_max_receive_size = 8192;
 
-static int smb_direct_max_read_write_size = 1024 * 1024;
+static int smb_direct_max_read_write_size = 1048512;
 
 static int smb_direct_max_outstanding_rw_ops = 8;
 
@@ -1908,7 +1908,9 @@ static int smb_direct_prepare(struct ksmbd_transport *t)
        st->max_send_size = min_t(int, st->max_send_size,
                                  le32_to_cpu(req->max_receive_size));
        st->max_fragmented_send_size =
-                       le32_to_cpu(req->max_fragmented_size);
+               le32_to_cpu(req->max_fragmented_size);
+       st->max_fragmented_recv_size =
+               (st->recv_credit_max * st->max_recv_size) / 2;
 
        ret = smb_direct_send_negotiate_response(st, ret);
 out: