diff options
| author | Björn Töpel <bjorn.topel@intel.com> | 2018-05-02 13:01:23 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-05-03 15:55:23 -0700 |
| commit | c0c77d8fb787cfe0c3fca689c2a30d1dad4eaba7 (patch) | |
| tree | 04413efa068765eb74d50fbb1ab6a4318f3d606f /include/net | |
| parent | 68e8b849b221b37a78a110a0307717d45e3593a0 (diff) | |
| download | linux-next-c0c77d8fb787cfe0c3fca689c2a30d1dad4eaba7.tar.gz | |
xsk: add user memory registration support sockopt
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 <magnus.karlsson@intel.com>
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/xdp_sock.h | 31 |
1 files changed, 31 insertions, 0 deletions
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 <linux/mutex.h> +#include <net/sock.h> + +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 */ |