selftests/xsk: automatically switch XDP programs

Implement automatic switching of XDP programs and execution modes if
needed by a test. This makes it much simpler to write a test as it
only has to say what XDP program it needs if it is not the default
one. This also makes it possible to remove the initial explicit
attachment of the XDP program as well as the explicit mode switch in
the code. These are now handled by the same code that just checks if a
switch is necessary, so no special cases are needed.

The default XDP program for all tests is one that sends all packets to
the AF_XDP socket. If you need another one, please use the new
function test_spec_set_xdp_prog() to specify what XDP programs and
maps to use for this test.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20230111093526.11682-16-magnus.karlsson@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/tools/testing/selftests/bpf/xskxceiver.h b/tools/testing/selftests/bpf/xskxceiver.h
index a4daa5134fc0..3e8ec7d8ec32 100644
--- a/tools/testing/selftests/bpf/xskxceiver.h
+++ b/tools/testing/selftests/bpf/xskxceiver.h
@@ -143,10 +143,11 @@ struct ifobject {
 	struct pkt_stream *pkt_stream;
 	struct xsk_xdp_progs *xdp_progs;
 	struct bpf_map *xskmap;
+	struct bpf_program *xdp_prog;
+	enum test_mode mode;
 	int ifindex;
 	u32 dst_ip;
 	u32 src_ip;
-	u32 xdp_flags;
 	u32 bind_flags;
 	u16 src_port;
 	u16 dst_port;
@@ -166,6 +167,10 @@ struct test_spec {
 	struct ifobject *ifobj_rx;
 	struct pkt_stream *tx_pkt_stream_default;
 	struct pkt_stream *rx_pkt_stream_default;
+	struct bpf_program *xdp_prog_rx;
+	struct bpf_program *xdp_prog_tx;
+	struct bpf_map *xskmap_rx;
+	struct bpf_map *xskmap_tx;
 	u16 total_steps;
 	u16 current_step;
 	u16 nb_sockets;