xsk: add Tx queue setup and mmap support
Another setsockopt (XDP_TX_QUEUE) is added to let the process allocate
a queue, where the user process can pass frames to be transmitted by
the kernel.
The mmapping of the queue is done using the XDP_PGOFF_TX_QUEUE offset.
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h
index ce3a2ab..185f492 100644
--- a/include/net/xdp_sock.h
+++ b/include/net/xdp_sock.h
@@ -30,6 +30,7 @@ struct xdp_sock {
struct xdp_umem *umem;
struct list_head flush_node;
u16 queue_id;
+ struct xsk_queue *tx ____cacheline_aligned_in_smp;
/* Protects multiple processes in the control path */
struct mutex mutex;
u64 rx_dropped;