From bb4c0419476bd3982ba802f0f49de83cd79532d8 Mon Sep 17 00:00:00 2001 From: Long Li Date: Tue, 17 Apr 2018 12:17:08 -0700 Subject: cifs: smbd: Don't use RDMA read/write when signing is used SMB server will not sign data transferred through RDMA read/write. When signing is used, it's a good idea to have all the data signed. In this case, use RDMA send/recv for all data transfers. This will degrade performance as this is not generally configured in RDMA environemnt. So warn the user on signing and RDMA send/recv. Signed-off-by: Long Li Acked-by: Ronnie Sahlberg Cc: stable@vger.kernel.org Signed-off-by: Steve French --- fs/cifs/cifssmb.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/cifs/cifssmb.c') diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 6d3e40d7029c..1529a088383d 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -455,6 +455,9 @@ cifs_enable_signing(struct TCP_Server_Info *server, bool mnt_sign_required) server->sign = true; } + if (cifs_rdma_enabled(server) && server->sign) + cifs_dbg(VFS, "Signing is enabled, and RDMA read/write will be disabled"); + return 0; } -- cgit v1.2.3-59-g8ed1b