In the next patch the hard-coded queue numbers are gonna be removed.
So introduce some initial support for ethtool YNL and use
it to enable header split.
Also, tcp-data-split requires latest ethtool which is unlikely
to be present in the distros right now.
(ideally, we should not shell out to ethtool at all).
Reviewed-by: Mina Almasry <almasrymina@xxxxxxxxxx>
Signed-off-by: Stanislav Fomichev <sdf@xxxxxxxxxxx>
---
tools/testing/selftests/net/Makefile | 2 +-
tools/testing/selftests/net/ncdevmem.c | 57 +++++++++++++++++++++++++-
2 files changed, 56 insertions(+), 3 deletions(-)
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index 26a4883a65c9..759b1d2dc8b4 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -111,7 +111,7 @@ TEST_INCLUDES := forwarding/lib.sh
include ../lib.mk
# YNL build
-YNL_GENS := netdev
+YNL_GENS := ethtool netdev
include ynl.mk
$(OUTPUT)/epoll_busy_poll: LDLIBS += -lcap
diff --git a/tools/testing/selftests/net/ncdevmem.c b/tools/testing/selftests/net/ncdevmem.c
index 8062d26fbce0..be89735d6408 100644
--- a/tools/testing/selftests/net/ncdevmem.c
+++ b/tools/testing/selftests/net/ncdevmem.c
@@ -55,10 +55,12 @@
#include <linux/netlink.h>
#include <linux/genetlink.h>
#include <linux/netdev.h>
+#include <linux/ethtool_netlink.h>
#include <time.h>
#include <net/if.h>
#include "netdev-user.h"
+#include "ethtool-user.h"
#include <ynl.h>
#define PAGE_SHIFT 12
@@ -231,10 +233,58 @@ static int reset_flow_steering(void)
return 0;
}
+static const char *tcp_data_split_str(int val)
+{
+ switch (val) {
+ case 0:
+ return "off";
+ case 1:
+ return "auto";
+ case 2:
+ return "on";
+ default:
+ return "?";
+ }
+}
+
static int configure_headersplit(bool on)
{
- return run_command("sudo ethtool -G %s tcp-data-split %s >&2", ifname,
- on ? "on" : "off");
+ struct ethtool_rings_get_req *get_req;
+ struct ethtool_rings_get_rsp *get_rsp;
+ struct ethtool_rings_set_req *req;
+ struct ynl_error yerr;
+ struct ynl_sock *ys;
+ int ret;
+
+ ys = ynl_sock_create(&ynl_ethtool_family, &yerr);
+ if (!ys) {
+ fprintf(stderr, "YNL: %s\n", yerr.msg);
+ return -1;
+ }
+
+ req = ethtool_rings_set_req_alloc();
+ ethtool_rings_set_req_set_header_dev_index(req, ifindex);
+ /* 0 - off, 1 - auto, 2 - on */
+ ethtool_rings_set_req_set_tcp_data_split(req, on ? 2 : 0);
+ ret = ethtool_rings_set(ys, req);
+ if (ret < 0)
+ fprintf(stderr, "YNL failed: %s\n", ys->err.msg);
+ ethtool_rings_set_req_free(req);
+
+ if (ret == 0) {
+ get_req = ethtool_rings_get_req_alloc();
+ ethtool_rings_get_req_set_header_dev_index(get_req, ifindex);
+ get_rsp = ethtool_rings_get(ys, get_req);
+ ethtool_rings_get_req_free(get_req);
+ if (get_rsp)
+ fprintf(stderr, "TCP header split: %s\n",
+ tcp_data_split_str(get_rsp->tcp_data_split));
+ ethtool_rings_get_rsp_free(get_rsp);
+ }
+
+ ynl_sock_destroy(ys);
+
+ return ret;
}
static int configure_rss(void)
@@ -384,6 +434,9 @@ int do_server(struct memory_buffer *mem)
if (reset_flow_steering())
error(1, 0, "Failed to reset flow steering\n");
+ if (configure_headersplit(1))
+ error(1, 0, "Failed to enable TCP header split\n");
+
/* Configure RSS to divert all traffic from our devmem queues */
if (configure_rss())
error(1, 0, "Failed to configure rss\n");
--
2.47.0
