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authorMagnus Karlsson <magnus.karlsson@intel.com>2018-05-02 13:01:26 +0200
committerAlexei Starovoitov <ast@kernel.org>2018-05-03 15:55:23 -0700
commit965a990984432cd01a9eb3514c64d86f56704295 (patch)
treee5fe0883da83cbc9f69f297f3b5090f74222404e /include/net/xdp_sock.h
parentb9b6b68e8abd101be6eb5330e4999218c696d1e8 (diff)
downloadlinux-965a990984432cd01a9eb3514c64d86f56704295.tar.bz2
xsk: add support for bind for Rx
Here, the bind syscall is added. Binding an AF_XDP socket, means associating the socket to an umem, a netdev and a queue index. This can be done in two ways. The first way, creating a "socket from scratch". Create the umem using the XDP_UMEM_REG setsockopt and an associated fill queue with XDP_UMEM_FILL_QUEUE. Create the Rx queue using the XDP_RX_QUEUE setsockopt. Call bind passing ifindex and queue index ("channel" in ethtool speak). The second way to bind a socket, is simply skipping the umem/netdev/queue index, and passing another already setup AF_XDP socket. The new socket will then have the same umem/netdev/queue index as the parent so it will share the same umem. You must also set the flags field in the socket address to XDP_SHARED_UMEM. v2: Use PTR_ERR instead of passing error variable explicitly. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/net/xdp_sock.h')
-rw-r--r--include/net/xdp_sock.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h
index db9a321de087..85d02512f59b 100644
--- a/include/net/xdp_sock.h
+++ b/include/net/xdp_sock.h
@@ -28,6 +28,7 @@ struct xdp_sock {
struct xsk_queue *rx;
struct net_device *dev;
struct xdp_umem *umem;
+ u16 queue_id;
/* Protects multiple processes in the control path */
struct mutex mutex;
};