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selftests/bpf: Add mptcp_connect link
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Signed-off-by: Geliang Tang <[email protected]>
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Geliang Tang committed Oct 25, 2024
1 parent 9dc12d7 commit eaca88d
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Showing 4 changed files with 193 additions and 7 deletions.
3 changes: 2 additions & 1 deletion tools/testing/selftests/bpf/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -157,7 +157,7 @@ TEST_GEN_PROGS_EXTENDED = \
flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \
test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \
xskxceiver xdp_redirect_multi xdp_synproxy veristat xdp_hw_metadata \
xdp_features bpf_test_no_cfi.ko mptcp_pm_nl_ctl
xdp_features bpf_test_no_cfi.ko mptcp_pm_nl_ctl mptcp_connect

TEST_GEN_FILES += liburandom_read.so urandom_read sign-file uprobe_multi

Expand Down Expand Up @@ -733,6 +733,7 @@ TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read $(OUTPUT)/bpf_testmod.ko \
$(OUTPUT)/sign-file \
$(OUTPUT)/uprobe_multi \
$(OUTPUT)/mptcp_pm_nl_ctl \
$(OUTPUT)/mptcp_connect \
ima_setup.sh \
verify_sig_setup.sh \
$(wildcard progs/btf_dump_test_case_*.c) \
Expand Down
1 change: 1 addition & 0 deletions tools/testing/selftests/bpf/mptcp_connect.c
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@@ -0,0 +1 @@
../net/mptcp/mptcp_connect.c
181 changes: 181 additions & 0 deletions tools/testing/selftests/bpf/prog_tests/mptcp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1277,6 +1277,183 @@ static void test_default(void)
cleanup_netns(nstoken);
}

#define NS1 NS_TEST"_1"
#define NS2 NS_TEST"_2"
#define ADDR_1_NS2 "10.0.1.2"
#define ADDR_2_NS2 "10.0.2.2"
#define ADDR_3_NS2 "10.0.3.2"
#define ADDR_3_NS4 "10.0.4.2"
#define ADDR6_1_NS2 "dead:beef:1::2"
#define ADDR6_2_NS2 "dead:beef:2::2"
#define ADDR6_3_NS2 "dead:beef:3::2"
#define ADDR6_4_NS2 "dead:beef:4::2"

static int address_init_1(void)
{
SYS(fail, "ip link add ns1eth1 netns %s type veth peer name ns2eth1 netns %s", NS1, NS2);
SYS(fail, "ip -net %s addr add %s/24 dev ns1eth1", NS1, ADDR_1);
SYS(fail, "ip -net %s addr add %s/64 dev ns1eth1 nodad", NS1, ADDR6_1);
SYS(fail, "ip -net %s link set dev ns1eth1 up", NS1);
SYS(fail, "ip -net %s addr add %s/24 dev ns2eth1", NS2, ADDR_1_NS2);
SYS(fail, "ip -net %s addr add %s/64 dev ns2eth1 nodad", NS2, ADDR6_1_NS2);
SYS(fail, "ip -net %s link set dev ns2eth1 up", NS2);
SYS(fail, "ip -net %s route add default via %s dev ns2eth1 metric 101", NS2, ADDR_1);
SYS(fail, "ip -net %s route add default via %s dev ns2eth1 metric 101", NS2, ADDR6_1);

SYS(fail, "ip link add ns1eth2 netns %s type veth peer name ns2eth2 netns %s", NS1, NS2);
SYS(fail, "ip -net %s addr add %s/24 dev ns1eth2", NS1, ADDR_2);
SYS(fail, "ip -net %s addr add %s/64 dev ns1eth2 nodad", NS1, ADDR6_2);
SYS(fail, "ip -net %s link set dev ns1eth2 up", NS1);
SYS(fail, "ip -net %s addr add %s/24 dev ns2eth2", NS2, ADDR_2_NS2);
SYS(fail, "ip -net %s addr add %s/64 dev ns2eth2 nodad", NS2, ADDR6_2_NS2);
SYS(fail, "ip -net %s link set dev ns2eth2 up", NS2);
SYS(fail, "ip -net %s route add default via %s dev ns2eth2 metric 102", NS2, ADDR_2);
SYS(fail, "ip -net %s route add default via %s dev ns2eth2 metric 102", NS2, ADDR6_2);

SYS(fail, "ip link add ns1eth3 netns %s type veth peer name ns2eth3 netns %s", NS1, NS2);
SYS(fail, "ip -net %s addr add %s/24 dev ns1eth3", NS1, ADDR_3);
SYS(fail, "ip -net %s addr add %s/64 dev ns1eth3 nodad", NS1, ADDR6_3);
SYS(fail, "ip -net %s link set dev ns1eth3 up", NS1);
SYS(fail, "ip -net %s addr add %s/24 dev ns2eth3", NS2, ADDR_3_NS2);
SYS(fail, "ip -net %s addr add %s/64 dev ns2eth3 nodad", NS2, ADDR6_3_NS2);
SYS(fail, "ip -net %s link set dev ns2eth3 up", NS2);
SYS(fail, "ip -net %s route add default via %s dev ns2eth3 metric 103", NS2, ADDR_3);
SYS(fail, "ip -net %s route add default via %s dev ns2eth3 metric 103", NS2, ADDR6_3);

SYS(fail, "ip link add ns1eth4 netns %s type veth peer name ns2eth4 netns %s", NS1, NS2);
SYS(fail, "ip -net %s addr add %s/24 dev ns1eth4", NS1, ADDR_4);
SYS(fail, "ip -net %s addr add %s/64 dev ns1eth4 nodad", NS1, ADDR6_4);
SYS(fail, "ip -net %s link set dev ns1eth4 up", NS1);
SYS(fail, "ip -net %s addr add %s/24 dev ns2eth4", NS2, ADDR_3_NS4);
SYS(fail, "ip -net %s addr add %s/64 dev ns2eth4 nodad", NS2, ADDR6_4_NS2);
SYS(fail, "ip -net %s link set dev ns2eth4 up", NS2);
SYS(fail, "ip -net %s route add default via %s dev ns2eth4 metric 104", NS2, ADDR_4);
SYS(fail, "ip -net %s route add default via %s dev ns2eth4 metric 104", NS2, ADDR6_4);

return 0;
fail:
return -1;
}

static int endpoint_add_1(char *netns, char *addr, char *flags, bool ip_mptcp)
{
if (ip_mptcp)
return SYS_NOFAIL("ip -net %s mptcp endpoint add %s %s",
netns, addr, flags);
return SYS_NOFAIL("ip netns exec %s %s add %s flags %s",
netns, PM_CTL, addr, flags);
}

static int endpoint_init_1(char *flags, u8 endpoints)
{
bool ip_mptcp = true;
int ret = -1;

if (!endpoints || endpoints > 4)
goto fail;

if (address_init_1())
goto fail;

if (SYS_NOFAIL("ip -net %s mptcp limits set add_addr_accepted 4 subflows 4",
NS1)) {
SYS(fail, "ip netns exec %s %s limits 4 4", NS1, PM_CTL);
ip_mptcp = false;
}

if (endpoints > 1)
ret = endpoint_add_1(NS2, ADDR_2_NS2, flags, ip_mptcp);
if (endpoints > 2)
ret = ret ?: endpoint_add_1(NS2, ADDR_3, flags, ip_mptcp);
if (endpoints > 3)
ret = ret ?: endpoint_add_1(NS2, ADDR_4, flags, ip_mptcp);

fail:
return ret;
}

static int sched_init_1(char *flags, char *sched)
{
if (endpoint_init_1(flags, 2) < 0)
goto fail;

SYS(fail, "ip netns exec %s sysctl -qw net.mptcp.scheduler=%s", NS1, sched);

return 0;
fail:
return -1;
}

static void do_verify(struct mptcp_bpf_bytes *skel, bool addr1, bool addr2)
{
if (addr1)
ASSERT_GT(skel->bss->bytes_sent_1, 0, "should have bytes_sent on addr1");
else
ASSERT_EQ(skel->bss->bytes_sent_1, 0, "shouldn't have bytes_sent on addr1");
if (addr2)
;//ASSERT_GT(skel->bss->bytes_sent_2, 0, "should have bytes_sent on addr2");
else
ASSERT_EQ(skel->bss->bytes_sent_2, 0, "shouldn't have bytes_sent on addr2");
}

static char *sin = "/tmp/sin";
static char *cin = "/tmp/cin";
static char *sout = "/tmp/sout";
static char *cout = "/tmp/cout";

static void test_connect(void)
{
struct mptcp_bpf_bytes *skel;
int err;

SYS_NOFAIL("ip netns del %s", NS1);
SYS_NOFAIL("ip netns del %s", NS2);
SYS(close_netns, "ip netns add %s", NS1);
SYS(close_netns, "ip netns add %s", NS2);

err = sched_init_1("subflow", "default");
if (!ASSERT_OK(err, "sched_init"))
goto close_netns;

skel = mptcp_bpf_bytes__open_and_load();
if (!ASSERT_OK_PTR(skel, "open_and_load: bytes"))
return;

skel->bss->pid = getpid();

err = mptcp_bpf_bytes__attach(skel);
if (!ASSERT_OK(err, "skel_attach: bytes"))
goto skel_destroy;

SYS(close_netns, "ip netns exec %s dd if=/dev/urandom of=%s bs=1M count=10 2> /dev/null", NS1, sin);
SYS(close_netns, "ip netns exec %s dd if=/dev/urandom of=%s bs=1M count=10 2> /dev/null", NS2, cin);
//SYS(close_netns, "ip netns exec %s echo hello > %s", NS1, sin);
//SYS(close_netns, "ip netns exec %s echo world > %s", NS2, cin);

SYS(close_netns, "ip netns exec %s ./mptcp_connect -l :: < %s > %s &", NS1, sin, sout);
usleep(100000); /* 0.1s */
SYS(close_netns, "ip netns exec %s ./mptcp_connect %s < %s > %s", NS2, ADDR_1, cin, cout);

//usleep(100000); /* 0.1s */

SYS_NOFAIL("ip netns exec %s killall ./mptcp_connect > /dev/null 2>&1", NS1);
//SYS_NOFAIL("ip netns exec %s killall ./mptcp_connect > /dev/null 2>&1", NS2);

//SYS(close_netns, "ip netns exec %s cat %s", NS1, sin);
//SYS(close_netns, "ip netns exec %s cat %s", NS2, cin);

do_verify(skel, WITH_DATA, WITH_DATA);
SYS_NOFAIL("ip netns exec %s rm -rf %s %s", NS1, sin, sout);
SYS_NOFAIL("ip netns exec %s rm -rf %s %s", NS2, cin, cout);
SYS(close_netns, "ip netns del %s", NS1);
SYS(close_netns, "ip netns del %s", NS2);

skel_destroy:
mptcp_bpf_bytes__destroy(skel);
close_netns:
;
}

static void test_bpf_sched(struct bpf_map *map, char *sched,
bool addr1, bool addr2)
{
Expand Down Expand Up @@ -1382,6 +1559,9 @@ static void test_stale(void)

void test_mptcp(void)
{
if (test__start_subtest("connect"))
test_connect();
#if 1
if (test__start_subtest("base"))
test_base();
if (test__start_subtest("mptcpify"))
Expand Down Expand Up @@ -1412,4 +1592,5 @@ void test_mptcp(void)
test_burst();
if (test__start_subtest("stale"))
test_stale();
#endif
}
15 changes: 9 additions & 6 deletions tools/testing/selftests/bpf/progs/mptcp_bpf_bytes.c
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Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,8 @@ int BPF_PROG(trace_mptcp_sched_get_send, struct mptcp_sock *msk)
{
struct mptcp_subflow_context *subflow;

if (bpf_get_current_pid_tgid() >> 32 != pid)
return 0;
//if (bpf_get_current_pid_tgid() >> 32 != pid)
// return 0;

if (!msk->pm.server_side)
return 0;
Expand All @@ -29,10 +29,13 @@ int BPF_PROG(trace_mptcp_sched_get_send, struct mptcp_sock *msk)
ssk = mptcp_subflow_tcp_sock(subflow);
tp = bpf_core_cast(ssk, struct tcp_sock);

if (subflow->subflow_id == 1)
bytes_sent_1 = tp->bytes_sent;
else if (subflow->subflow_id == 2)
bytes_sent_2 = tp->bytes_sent;
if (subflow->subflow_id == 1) {
bpf_printk("bytes 1: sent %lu received %lu subflows %u", tp->bytes_sent, tp->bytes_received, msk->pm.subflows);
bytes_sent_1 += tp->bytes_sent;
} else if (subflow->subflow_id == 2) {
bpf_printk("bytes 2: sent %lu received %lu subflows %u", tp->bytes_sent, tp->bytes_received, msk->pm.subflows);
bytes_sent_2 += tp->bytes_sent;
}
}

return 0;
Expand Down

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