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author | Magnus Karlsson <magnus.karlsson@intel.com> | 2018-05-02 13:01:26 +0200 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2018-05-03 15:55:23 -0700 |
commit | 965a990984432cd01a9eb3514c64d86f56704295 (patch) | |
tree | e5fe0883da83cbc9f69f297f3b5090f74222404e /include/net/xdp_sock.h | |
parent | b9b6b68e8abd101be6eb5330e4999218c696d1e8 (diff) | |
download | linux-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.h | 1 |
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; }; |