From c0c77d8fb787cfe0c3fca689c2a30d1dad4eaba7 Mon Sep 17 00:00:00 2001 From: Björn Töpel Date: Wed, 2 May 2018 13:01:23 +0200 Subject: xsk: add user memory registration support sockopt MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In this commit the base structure of the AF_XDP address family is set up. Further, we introduce the abilty register a window of user memory to the kernel via the XDP_UMEM_REG setsockopt syscall. The memory window is viewed by an AF_XDP socket as a set of equally large frames. After a user memory registration all frames are "owned" by the user application, and not the kernel. v2: More robust checks on umem creation and unaccount on error. Call set_page_dirty_lock on cleanup. Simplified xdp_umem_reg. Co-authored-by: Magnus Karlsson Signed-off-by: Magnus Karlsson Signed-off-by: Björn Töpel Signed-off-by: Alexei Starovoitov --- include/net/xdp_sock.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 include/net/xdp_sock.h (limited to 'include/net/xdp_sock.h') diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h new file mode 100644 index 000000000000..94785f5db13e --- /dev/null +++ b/include/net/xdp_sock.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 + * AF_XDP internal functions + * Copyright(c) 2018 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#ifndef _LINUX_XDP_SOCK_H +#define _LINUX_XDP_SOCK_H + +#include +#include + +struct xdp_umem; + +struct xdp_sock { + /* struct sock must be the first member of struct xdp_sock */ + struct sock sk; + struct xdp_umem *umem; + /* Protects multiple processes in the control path */ + struct mutex mutex; +}; + +#endif /* _LINUX_XDP_SOCK_H */ -- cgit v1.2.3-59-g8ed1b