From: Hyunchul Lee <hyc.lee@gmail.com>
Date: Mon, 18 Dec 2023 15:32:40 +0000 (+0900)
Subject: ksmbd: smbd: change the default maximum read/write, receive size
X-Git-Tag: v5.15.145~140
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d15077ad35afb78e33ab22c9e8a459eb9c13990a;p=thirdparty%2Fkernel%2Fstable.git

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

[ Upstream commit 4d02c4fdc0e256b493f9a3b604c7ff18f0019f17 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/ksmbd/transport_rdma.c b/fs/ksmbd/transport_rdma.c
index 5901c4a2ece1d..7e85c2767cd03 100644
--- a/fs/ksmbd/transport_rdma.c
+++ b/fs/ksmbd/transport_rdma.c
@@ -1914,7 +1914,9 @@ 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: