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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 /net/xdp/xsk_queue.h
parentb9b6b68e8abd101be6eb5330e4999218c696d1e8 (diff)
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 'net/xdp/xsk_queue.h')
-rw-r--r--net/xdp/xsk_queue.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
index 5439fa381763..9ddd2ee07a84 100644
--- a/net/xdp/xsk_queue.h
+++ b/net/xdp/xsk_queue.h
@@ -32,6 +32,7 @@ struct xsk_queue {
u64 invalid_descs;
};
+void xskq_set_umem(struct xsk_queue *q, struct xdp_umem_props *umem_props);
struct xsk_queue *xskq_create(u32 nentries, bool umem_queue);
void xskq_destroy(struct xsk_queue *q);