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selftests/bpf: Add netkit to tc_redirect selftest 

Extend the existing tc_redirect selftest to also cover netkit devices
for exercising the bpf_redirect_peer() code paths, so that we have both
veth as well as netkit covered, all tests still pass after this change.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://lore.kernel.org/r/20231114004220.6495-9-daniel@iogearbox.net
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Daniel Borkmann 2023-11-14 01:42:20 +01:00 committed by Martin KaFai Lau
parent eee82da79f
commit adfeae2d24
1 changed files with 52 additions and 0 deletions
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52
tools/testing/selftests/bpf/prog_tests/tc_redirect.c
View File

@ -24,6 +24,7 @@
#include "test_progs.h"
#include "network_helpers.h"
#include "netlink_helpers.h"
#include "test_tc_neigh_fib.skel.h"
#include "test_tc_neigh.skel.h"
#include "test_tc_peer.skel.h"
@ -112,6 +113,7 @@ static void netns_setup_namespaces_nofail(const char *verb)
enum dev_mode {
MODE_VETH,
MODE_NETKIT,
};
struct netns_setup_result {
@ -142,10 +144,51 @@ static int get_ifaddr(const char *name, char *ifaddr)
return 0;
}
static int create_netkit(int mode, char *prim, char *peer)
{
struct rtattr *linkinfo, *data, *peer_info;
struct rtnl_handle rth = { .fd = -1 };
const char *type = "netkit";
struct {
struct nlmsghdr n;
struct ifinfomsg i;
char buf[1024];
} req = {};
int err;
err = rtnl_open(&rth, 0);
if (!ASSERT_OK(err, "open_rtnetlink"))
return err;
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
req.n.nlmsg_type = RTM_NEWLINK;
req.i.ifi_family = AF_UNSPEC;
addattr_l(&req.n, sizeof(req), IFLA_IFNAME, prim, strlen(prim));
linkinfo = addattr_nest(&req.n, sizeof(req), IFLA_LINKINFO);
addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type, strlen(type));
data = addattr_nest(&req.n, sizeof(req), IFLA_INFO_DATA);
addattr32(&req.n, sizeof(req), IFLA_NETKIT_MODE, mode);
peer_info = addattr_nest(&req.n, sizeof(req), IFLA_NETKIT_PEER_INFO);
req.n.nlmsg_len += sizeof(struct ifinfomsg);
addattr_l(&req.n, sizeof(req), IFLA_IFNAME, peer, strlen(peer));
addattr_nest_end(&req.n, peer_info);
addattr_nest_end(&req.n, data);
addattr_nest_end(&req.n, linkinfo);
err = rtnl_talk(&rth, &req.n, NULL);
ASSERT_OK(err, "talk_rtnetlink");
rtnl_close(&rth);
return err;
}
static int netns_setup_links_and_routes(struct netns_setup_result *result)
{
struct nstoken *nstoken = NULL;
char src_fwd_addr[IFADDR_STR_LEN+1] = {};
int err;
if (result->dev_mode == MODE_VETH) {
SYS(fail, "ip link add src type veth peer name src_fwd");
@ -153,6 +196,13 @@ static int netns_setup_links_and_routes(struct netns_setup_result *result)
SYS(fail, "ip link set dst_fwd address " MAC_DST_FWD);
SYS(fail, "ip link set dst address " MAC_DST);
} else if (result->dev_mode == MODE_NETKIT) {
err = create_netkit(NETKIT_L3, "src", "src_fwd");
if (!ASSERT_OK(err, "create_ifindex_src"))
goto fail;
err = create_netkit(NETKIT_L3, "dst", "dst_fwd");
if (!ASSERT_OK(err, "create_ifindex_dst"))
goto fail;
}
if (get_ifaddr("src_fwd", src_fwd_addr))
@ -1134,7 +1184,9 @@ static void *test_tc_redirect_run_tests(void *arg)
netns_setup_namespaces_nofail("delete");
RUN_TEST(tc_redirect_peer, MODE_VETH);
RUN_TEST(tc_redirect_peer, MODE_NETKIT);
RUN_TEST(tc_redirect_peer_l3, MODE_VETH);
RUN_TEST(tc_redirect_peer_l3, MODE_NETKIT);
RUN_TEST(tc_redirect_neigh, MODE_VETH);
RUN_TEST(tc_redirect_neigh_fib, MODE_VETH);
RUN_TEST(tc_redirect_dtime, MODE_VETH);