From 1d0dc06930a917eaca4156193c6c49f798b95ce7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= Date: Thu, 24 Jan 2019 19:59:37 +0100 Subject: net: xsk: track AF_XDP sockets on a per-netns list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Track each AF_XDP socket in a per-netns list. This will be used later by the sock_diag interface for querying sockets from userspace. Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann --- include/net/net_namespace.h | 4 ++++ include/net/netns/xdp.h | 13 +++++++++++++ 2 files changed, 17 insertions(+) create mode 100644 include/net/netns/xdp.h (limited to 'include') diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 99d4148e0f90..a68ced28d8f4 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -160,6 +161,9 @@ struct net { #endif #if IS_ENABLED(CONFIG_CAN) struct netns_can can; +#endif +#ifdef CONFIG_XDP_SOCKETS + struct netns_xdp xdp; #endif struct sock *diag_nlsk; atomic_t fnhe_genid; diff --git a/include/net/netns/xdp.h b/include/net/netns/xdp.h new file mode 100644 index 000000000000..e5734261ba0a --- /dev/null +++ b/include/net/netns/xdp.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __NETNS_XDP_H__ +#define __NETNS_XDP_H__ + +#include +#include + +struct netns_xdp { + struct mutex lock; + struct hlist_head list; +}; + +#endif /* __NETNS_XDP_H__ */ -- cgit v1.2.3 From 50e74c0131a5b3a3e387798a5705158c04fb3bd0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= Date: Thu, 24 Jan 2019 19:59:38 +0100 Subject: xsk: add id to umem MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This commit adds an id to the umem structure. The id uniquely identifies a umem instance, and will be exposed to user-space via the socket monitoring interface. Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann --- include/net/xdp_sock.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h index 13acb9803a6d..61cf7dbb6782 100644 --- a/include/net/xdp_sock.h +++ b/include/net/xdp_sock.h @@ -42,6 +42,7 @@ struct xdp_umem { struct work_struct work; struct page **pgs; u32 npgs; + int id; struct net_device *dev; struct xdp_umem_fq_reuse *fq_reuse; u16 queue_id; -- cgit v1.2.3 From a36b38aa2af61146ea80980a01cf6e952ab021c1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= Date: Thu, 24 Jan 2019 19:59:39 +0100 Subject: xsk: add sock_diag interface for AF_XDP MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds the sock_diag interface for querying sockets from user space. Tools like iproute2 ss(8) can use this interface to list open AF_XDP sockets. The user-space ABI is defined in linux/xdp_diag.h and includes netlink request and response structs. The request can query sockets and the response contains socket information about the rings, umems, inode and more. Signed-off-by: Björn Töpel Signed-off-by: Daniel Borkmann --- include/uapi/linux/xdp_diag.h | 72 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 include/uapi/linux/xdp_diag.h (limited to 'include') diff --git a/include/uapi/linux/xdp_diag.h b/include/uapi/linux/xdp_diag.h new file mode 100644 index 000000000000..78b2591a7782 --- /dev/null +++ b/include/uapi/linux/xdp_diag.h @@ -0,0 +1,72 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * xdp_diag: interface for query/monitor XDP sockets + * Copyright(c) 2019 Intel Corporation. + */ + +#ifndef _LINUX_XDP_DIAG_H +#define _LINUX_XDP_DIAG_H + +#include + +struct xdp_diag_req { + __u8 sdiag_family; + __u8 sdiag_protocol; + __u16 pad; + __u32 xdiag_ino; + __u32 xdiag_show; + __u32 xdiag_cookie[2]; +}; + +struct xdp_diag_msg { + __u8 xdiag_family; + __u8 xdiag_type; + __u16 pad; + __u32 xdiag_ino; + __u32 xdiag_cookie[2]; +}; + +#define XDP_SHOW_INFO (1 << 0) /* Basic information */ +#define XDP_SHOW_RING_CFG (1 << 1) +#define XDP_SHOW_UMEM (1 << 2) +#define XDP_SHOW_MEMINFO (1 << 3) + +enum { + XDP_DIAG_NONE, + XDP_DIAG_INFO, + XDP_DIAG_UID, + XDP_DIAG_RX_RING, + XDP_DIAG_TX_RING, + XDP_DIAG_UMEM, + XDP_DIAG_UMEM_FILL_RING, + XDP_DIAG_UMEM_COMPLETION_RING, + XDP_DIAG_MEMINFO, + __XDP_DIAG_MAX, +}; + +#define XDP_DIAG_MAX (__XDP_DIAG_MAX - 1) + +struct xdp_diag_info { + __u32 ifindex; + __u32 queue_id; +}; + +struct xdp_diag_ring { + __u32 entries; /*num descs */ +}; + +#define XDP_DU_F_ZEROCOPY (1 << 0) + +struct xdp_diag_umem { + __u64 size; + __u32 id; + __u32 num_pages; + __u32 chunk_size; + __u32 headroom; + __u32 ifindex; + __u32 queue_id; + __u32 flags; + __u32 refs; +}; + +#endif /* _LINUX_XDP_DIAG_H */ -- cgit v1.2.3