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[PATCH] selftests/bpf: Move test_lwt_ip_encap to test_progs

by Bastien Curutchet (eBPF Foundation)

test_lwt_ip_encap.sh isn't used by the BPF CI. Add a new file in the test_progs framework to migrate the tests done by test_lwt_ip_encap.sh. It uses the same network topology and the same BPF programs located in progs/test_lwt_ip_encap.c. Rework the GSO part to avoid using nc and dd. Remove test_lwt_ip_encap.sh and its Makefile entry. Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet(a)bootlin.com> --- tools/testing/selftests/bpf/Makefile | 3 +- .../selftests/bpf/prog_tests/lwt_ip_encap.c | 540 +++++++++++++++++++++ tools/testing/selftests/bpf/test_lwt_ip_encap.sh | 476 ------------------ 3 files changed, 541 insertions(+), 478 deletions(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index e6a02d5b87d123cef7e6b41bfbc96d34083f38e1..df4814b5200a5a0e732b19ab3a5975957fb7cbc9 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -95,7 +95,7 @@ TEST_GEN_PROGS += test_progs-cpuv4 TEST_INST_SUBDIRS += cpuv4 endif -TEST_GEN_FILES = test_lwt_ip_encap.bpf.o test_tc_edt.bpf.o +TEST_GEN_FILES = test_tc_edt.bpf.o TEST_FILES = xsk_prereqs.sh $(wildcard progs/btf_dump_test_case_*.c) # Order correspond to 'make run_tests' order @@ -104,7 +104,6 @@ TEST_PROGS := test_kmod.sh \ test_lirc_mode2.sh \ test_xdp_vlan_mode_generic.sh \ test_xdp_vlan_mode_native.sh \ - test_lwt_ip_encap.sh \ test_tc_tunnel.sh \ test_tc_edt.sh \ test_xdping.sh \ diff --git a/tools/testing/selftests/bpf/prog_tests/lwt_ip_encap.c b/tools/testing/selftests/bpf/prog_tests/lwt_ip_encap.c new file mode 100644 index 0000000000000000000000000000000000000000..61fcded43b46cab7775237c6d85de07b5df7d87e --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/lwt_ip_encap.c @@ -0,0 +1,540 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <netinet/in.h> + +#include "network_helpers.h" +#include "test_progs.h" + +#define BPF_FILE "test_lwt_ip_encap.bpf.o" + +#define NETNS_NAME_SIZE 32 +#define NETNS_BASE "ns-lwt-ip-encap" + +#define IP4_ADDR_1 "172.16.1.100" +#define IP4_ADDR_2 "172.16.2.100" +#define IP4_ADDR_3 "172.16.3.100" +#define IP4_ADDR_4 "172.16.4.100" +#define IP4_ADDR_5 "172.16.5.100" +#define IP4_ADDR_6 "172.16.6.100" +#define IP4_ADDR_7 "172.16.7.100" +#define IP4_ADDR_8 "172.16.8.100" +#define IP4_ADDR_GRE "172.16.16.100" + +#define IP4_ADDR_SRC IP4_ADDR_1 +#define IP4_ADDR_DST IP4_ADDR_4 + +#define IP6_ADDR_1 "fb01::1" +#define IP6_ADDR_2 "fb02::1" +#define IP6_ADDR_3 "fb03::1" +#define IP6_ADDR_4 "fb04::1" +#define IP6_ADDR_5 "fb05::1" +#define IP6_ADDR_6 "fb06::1" +#define IP6_ADDR_7 "fb07::1" +#define IP6_ADDR_8 "fb08::1" +#define IP6_ADDR_GRE "fb10::1" + +#define IP6_ADDR_SRC IP6_ADDR_1 +#define IP6_ADDR_DST IP6_ADDR_4 + +/* Setup/topology: + * + * NS1 NS2 NS3 + * veth1 <---> veth2 veth3 <---> veth4 (the top route) + * veth5 <---> veth6 veth7 <---> veth8 (the bottom route) + * + * Each vethN gets IP[4|6]_ADDR_N address. + * + * IP*_ADDR_SRC = IP*_ADDR_1 + * IP*_ADDR_DST = IP*_ADDR_4 + * + * All tests test pings from IP*_ADDR__SRC to IP*_ADDR_DST. + * + * By default, routes are configured to allow packets to go + * IP*_ADDR_1 <=> IP*_ADDR_2 <=> IP*_ADDR_3 <=> IP*_ADDR_4 (the top route). + * + * A GRE device is installed in NS3 with IP*_ADDR_GRE, and + * NS1/NS2 are configured to route packets to IP*_ADDR_GRE via IP*_ADDR_8 + * (the bottom route). + * + * Tests: + * + * 1. Routes NS2->IP*_ADDR_DST are brought down, so the only way a ping + * from IP*_ADDR_SRC to IP*_ADDR_DST can work is via IP*_ADDR_GRE. + * + * 2a. In an egress test, a bpf LWT_XMIT program is installed on veth1 + * that encaps the packets with an IP/GRE header to route to IP*_ADDR_GRE. + * + * ping: SRC->[encap at veth1:egress]->GRE:decap->DST + * ping replies go DST->SRC directly + * + * 2b. In an ingress test, a bpf LWT_IN program is installed on veth2 + * that encaps the packets with an IP/GRE header to route to IP*_ADDR_GRE. + * + * ping: SRC->[encap at veth2:ingress]->GRE:decap->DST + * ping replies go DST->SRC directly + */ + +static int create_ns(char *name, size_t name_sz) +{ + if (!name) + goto fail; + + if (!ASSERT_OK(append_tid(name, name_sz), "append TID")) + goto fail; + + SYS(fail, "ip netns add %s", name); + + /* rp_filter gets confused by what these tests are doing, so disable it */ + SYS(fail, "ip netns exec %s sysctl -wq net.ipv4.conf.all.rp_filter=0", name); + SYS(fail, "ip netns exec %s sysctl -wq net.ipv4.conf.default.rp_filter=0", name); + /* Disable IPv6 DAD because it sometimes takes too long and fails tests */ + SYS(fail, "ip netns exec %s sysctl -wq net.ipv6.conf.all.accept_dad=0", name); + SYS(fail, "ip netns exec %s sysctl -wq net.ipv6.conf.default.accept_dad=0", name); + + return 0; +fail: + return -1; +} + +static int set_top_addr(const char *ns1, const char *ns2, const char *ns3) +{ + SYS(fail, "ip -n %s a add %s/24 dev veth1", ns1, IP4_ADDR_1); + SYS(fail, "ip -n %s a add %s/24 dev veth2", ns2, IP4_ADDR_2); + SYS(fail, "ip -n %s a add %s/24 dev veth3", ns2, IP4_ADDR_3); + SYS(fail, "ip -n %s a add %s/24 dev veth4", ns3, IP4_ADDR_4); + SYS(fail, "ip -n %s -6 a add %s/128 dev veth1", ns1, IP6_ADDR_1); + SYS(fail, "ip -n %s -6 a add %s/128 dev veth2", ns2, IP6_ADDR_2); + SYS(fail, "ip -n %s -6 a add %s/128 dev veth3", ns2, IP6_ADDR_3); + SYS(fail, "ip -n %s -6 a add %s/128 dev veth4", ns3, IP6_ADDR_4); + + SYS(fail, "ip -n %s link set dev veth1 up", ns1); + SYS(fail, "ip -n %s link set dev veth2 up", ns2); + SYS(fail, "ip -n %s link set dev veth3 up", ns2); + SYS(fail, "ip -n %s link set dev veth4 up", ns3); + + return 0; +fail: + return 1; +} + +static int set_bottom_addr(const char *ns1, const char *ns2, const char *ns3) +{ + SYS(fail, "ip -n %s a add %s/24 dev veth5", ns1, IP4_ADDR_5); + SYS(fail, "ip -n %s a add %s/24 dev veth6", ns2, IP4_ADDR_6); + SYS(fail, "ip -n %s a add %s/24 dev veth7", ns2, IP4_ADDR_7); + SYS(fail, "ip -n %s a add %s/24 dev veth8", ns3, IP4_ADDR_8); + SYS(fail, "ip -n %s -6 a add %s/128 dev veth5", ns1, IP6_ADDR_5); + SYS(fail, "ip -n %s -6 a add %s/128 dev veth6", ns2, IP6_ADDR_6); + SYS(fail, "ip -n %s -6 a add %s/128 dev veth7", ns2, IP6_ADDR_7); + SYS(fail, "ip -n %s -6 a add %s/128 dev veth8", ns3, IP6_ADDR_8); + + SYS(fail, "ip -n %s link set dev veth5 up", ns1); + SYS(fail, "ip -n %s link set dev veth6 up", ns2); + SYS(fail, "ip -n %s link set dev veth7 up", ns2); + SYS(fail, "ip -n %s link set dev veth8 up", ns3); + + return 0; +fail: + return 1; +} + +static int configure_vrf(const char *ns1, const char *ns2) +{ + if (!ns1 || !ns2) + goto fail; + + SYS(fail, "ip -n %s link add red type vrf table 1001", ns1); + SYS(fail, "ip -n %s link set red up", ns1); + SYS(fail, "ip -n %s route add table 1001 unreachable default metric 8192", ns1); + SYS(fail, "ip -n %s -6 route add table 1001 unreachable default metric 8192", ns1); + SYS(fail, "ip -n %s link set veth1 vrf red", ns1); + SYS(fail, "ip -n %s link set veth5 vrf red", ns1); + + SYS(fail, "ip -n %s link add red type vrf table 1001", ns2); + SYS(fail, "ip -n %s link set red up", ns2); + SYS(fail, "ip -n %s route add table 1001 unreachable default metric 8192", ns2); + SYS(fail, "ip -n %s -6 route add table 1001 unreachable default metric 8192", ns2); + SYS(fail, "ip -n %s link set veth2 vrf red", ns2); + SYS(fail, "ip -n %s link set veth3 vrf red", ns2); + SYS(fail, "ip -n %s link set veth6 vrf red", ns2); + SYS(fail, "ip -n %s link set veth7 vrf red", ns2); + + return 0; +fail: + return -1; +} + +static int configure_ns1(const char *ns1, const char *vrf) +{ + struct nstoken *nstoken = NULL; + + if (!ns1 || !vrf) + goto fail; + + nstoken = open_netns(ns1); + if (!ASSERT_OK_PTR(nstoken, "open ns1")) + goto fail; + + /* Top route */ + SYS(fail, "ip route add %s/32 dev veth1 %s", IP4_ADDR_2, vrf); + SYS(fail, "ip route add default dev veth1 via %s %s", IP4_ADDR_2, vrf); + SYS(fail, "ip -6 route add %s/128 dev veth1 %s", IP6_ADDR_2, vrf); + SYS(fail, "ip -6 route add default dev veth1 via %s %s", IP6_ADDR_2, vrf); + /* Bottom route */ + SYS(fail, "ip route add %s/32 dev veth5 %s", IP4_ADDR_6, vrf); + SYS(fail, "ip route add %s/32 dev veth5 via %s %s", IP4_ADDR_7, IP4_ADDR_6, vrf); + SYS(fail, "ip route add %s/32 dev veth5 via %s %s", IP4_ADDR_8, IP4_ADDR_6, vrf); + SYS(fail, "ip -6 route add %s/128 dev veth5 %s", IP6_ADDR_6, vrf); + SYS(fail, "ip -6 route add %s/128 dev veth5 via %s %s", IP6_ADDR_7, IP6_ADDR_6, vrf); + SYS(fail, "ip -6 route add %s/128 dev veth5 via %s %s", IP6_ADDR_8, IP6_ADDR_6, vrf); + + close_netns(nstoken); + return 0; +fail: + close_netns(nstoken); + return -1; +} + +static int configure_ns2(const char *ns2, const char *vrf) +{ + struct nstoken *nstoken = NULL; + + if (!ns2 || !vrf) + goto fail; + + nstoken = open_netns(ns2); + if (!ASSERT_OK_PTR(nstoken, "open ns2")) + goto fail; + + SYS(fail, "ip netns exec %s sysctl -wq net.ipv4.ip_forward=1", ns2); + SYS(fail, "ip netns exec %s sysctl -wq net.ipv6.conf.all.forwarding=1", ns2); + + /* Top route */ + SYS(fail, "ip route add %s/32 dev veth2 %s", IP4_ADDR_1, vrf); + SYS(fail, "ip route add %s/32 dev veth3 %s", IP4_ADDR_4, vrf); + SYS(fail, "ip -6 route add %s/128 dev veth2 %s", IP6_ADDR_1, vrf); + SYS(fail, "ip -6 route add %s/128 dev veth3 %s", IP6_ADDR_4, vrf); + /* Bottom route */ + SYS(fail, "ip route add %s/32 dev veth6 %s", IP4_ADDR_5, vrf); + SYS(fail, "ip route add %s/32 dev veth7 %s", IP4_ADDR_8, vrf); + SYS(fail, "ip -6 route add %s/128 dev veth6 %s", IP6_ADDR_5, vrf); + SYS(fail, "ip -6 route add %s/128 dev veth7 %s", IP6_ADDR_8, vrf); + + close_netns(nstoken); + return 0; +fail: + close_netns(nstoken); + return -1; +} + +static int configure_ns3(const char *ns3) +{ + struct nstoken *nstoken = NULL; + + if (!ns3) + goto fail; + + nstoken = open_netns(ns3); + if (!ASSERT_OK_PTR(nstoken, "open ns3")) + goto fail; + + /* Top route */ + SYS(fail, "ip route add %s/32 dev veth4", IP4_ADDR_3); + SYS(fail, "ip route add %s/32 dev veth4 via %s", IP4_ADDR_1, IP4_ADDR_3); + SYS(fail, "ip route add %s/32 dev veth4 via %s", IP4_ADDR_2, IP4_ADDR_3); + SYS(fail, "ip -6 route add %s/128 dev veth4", IP6_ADDR_3); + SYS(fail, "ip -6 route add %s/128 dev veth4 via %s", IP6_ADDR_1, IP6_ADDR_3); + SYS(fail, "ip -6 route add %s/128 dev veth4 via %s", IP6_ADDR_2, IP6_ADDR_3); + /* Bottom route */ + SYS(fail, "ip route add %s/32 dev veth8", IP4_ADDR_7); + SYS(fail, "ip route add %s/32 dev veth8 via %s", IP4_ADDR_5, IP4_ADDR_7); + SYS(fail, "ip route add %s/32 dev veth8 via %s", IP4_ADDR_6, IP4_ADDR_7); + SYS(fail, "ip -6 route add %s/128 dev veth8", IP6_ADDR_7); + SYS(fail, "ip -6 route add %s/128 dev veth8 via %s", IP6_ADDR_5, IP6_ADDR_7); + SYS(fail, "ip -6 route add %s/128 dev veth8 via %s", IP6_ADDR_6, IP6_ADDR_7); + + /* Configure IPv4 GRE device */ + SYS(fail, "ip tunnel add gre_dev mode gre remote %s local %s ttl 255", + IP4_ADDR_1, IP4_ADDR_GRE); + SYS(fail, "ip link set gre_dev up"); + SYS(fail, "ip a add %s dev gre_dev", IP4_ADDR_GRE); + + /* Configure IPv6 GRE device */ + SYS(fail, "ip tunnel add gre6_dev mode ip6gre remote %s local %s ttl 255", + IP6_ADDR_1, IP6_ADDR_GRE); + SYS(fail, "ip link set gre6_dev up"); + SYS(fail, "ip a add %s dev gre6_dev", IP6_ADDR_GRE); + + close_netns(nstoken); + return 0; +fail: + close_netns(nstoken); + return -1; +} + +static int setup_network(char *ns1, char *ns2, char *ns3, const char *vrf) +{ + if (!ns1 || !ns2 || !ns3 || !vrf) + goto fail; + + SYS(fail, "ip -n %s link add veth1 type veth peer name veth2 netns %s", ns1, ns2); + SYS(fail, "ip -n %s link add veth3 type veth peer name veth4 netns %s", ns2, ns3); + SYS(fail, "ip -n %s link add veth5 type veth peer name veth6 netns %s", ns1, ns2); + SYS(fail, "ip -n %s link add veth7 type veth peer name veth8 netns %s", ns2, ns3); + + if (vrf[0]) { + if (!ASSERT_OK(configure_vrf(ns1, ns2), "configure vrf")) + goto fail; + } + if (!ASSERT_OK(set_top_addr(ns1, ns2, ns3), "set top addresses")) + goto fail; + + if (!ASSERT_OK(set_bottom_addr(ns1, ns2, ns3), "set bottom addresses")) + goto fail; + + if (!ASSERT_OK(configure_ns1(ns1, vrf), "configure ns1 routes")) + goto fail; + + if (!ASSERT_OK(configure_ns2(ns2, vrf), "configure ns2 routes")) + goto fail; + + if (!ASSERT_OK(configure_ns3(ns3), "configure ns3 routes")) + goto fail; + + /* Link bottom route to the GRE tunnels */ + SYS(fail, "ip -n %s route add %s/32 dev veth5 via %s %s", + ns1, IP4_ADDR_GRE, IP4_ADDR_6, vrf); + SYS(fail, "ip -n %s route add %s/32 dev veth7 via %s %s", + ns2, IP4_ADDR_GRE, IP4_ADDR_8, vrf); + SYS(fail, "ip -n %s -6 route add %s/128 dev veth5 via %s %s", + ns1, IP6_ADDR_GRE, IP6_ADDR_6, vrf); + SYS(fail, "ip -n %s -6 route add %s/128 dev veth7 via %s %s", + ns2, IP6_ADDR_GRE, IP6_ADDR_8, vrf); + + return 0; +fail: + return -1; +} + +int remove_routes_to_gredev(const char *ns1, const char *ns2, const char *vrf) +{ + SYS(fail, "ip -n %s route del %s dev veth5 %s", ns1, IP4_ADDR_GRE, vrf); + SYS(fail, "ip -n %s route del %s dev veth7 %s", ns2, IP4_ADDR_GRE, vrf); + SYS(fail, "ip -n %s -6 route del %s/128 dev veth5 %s", ns1, IP6_ADDR_GRE, vrf); + SYS(fail, "ip -n %s -6 route del %s/128 dev veth7 %s", ns2, IP6_ADDR_GRE, vrf); + + return 0; +fail: + return -1; +} + +int add_unreachable_routes_to_gredev(const char *ns1, const char *ns2, const char *vrf) +{ + SYS(fail, "ip -n %s route add unreachable %s/32 %s", ns1, IP4_ADDR_GRE, vrf); + SYS(fail, "ip -n %s route add unreachable %s/32 %s", ns2, IP4_ADDR_GRE, vrf); + SYS(fail, "ip -n %s -6 route add unreachable %s/128 %s", ns1, IP6_ADDR_GRE, vrf); + SYS(fail, "ip -n %s -6 route add unreachable %s/128 %s", ns2, IP6_ADDR_GRE, vrf); + + return 0; +fail: + return -1; +} + +#define GSO_SIZE 5000 +#define GSO_TCP_PORT 9000 +/* This tests the fix from commit ea0371f78799 ("net: fix GSO in bpf_lwt_push_ip_encap") */ +static int test_gso_fix(const char *ns1, const char *ns3, int family) +{ + const char *ip_addr = family == AF_INET ? IP4_ADDR_DST : IP6_ADDR_DST; + char gso_packet[GSO_SIZE] = {}; + struct nstoken *nstoken = NULL; + int sfd, cfd, afd; + ssize_t bytes; + int ret = -1; + + if (!ns1 || !ns3) + return ret; + + nstoken = open_netns(ns3); + if (!ASSERT_OK_PTR(nstoken, "open ns3")) + return ret; + + sfd = start_server_str(family, SOCK_STREAM, ip_addr, GSO_TCP_PORT, NULL); + if (!ASSERT_OK_FD(sfd, "start server")) + goto close_netns; + + close_netns(nstoken); + + nstoken = open_netns(ns1); + if (!ASSERT_OK_PTR(nstoken, "open ns1")) + goto close_server; + + cfd = connect_to_addr_str(family, SOCK_STREAM, ip_addr, GSO_TCP_PORT, NULL); + if (!ASSERT_OK_FD(cfd, "connect to server")) + goto close_server; + + close_netns(nstoken); + nstoken = NULL; + + afd = accept(sfd, NULL, NULL); + if (!ASSERT_OK_FD(afd, "accept")) + goto close_client; + + /* Send a packet larger than MTU */ + bytes = send(cfd, gso_packet, GSO_SIZE, 0); + if (!ASSERT_EQ(bytes, GSO_SIZE, "send packet")) + goto close_accept; + + /* Verify we received all expected bytes */ + bytes = read(afd, gso_packet, GSO_SIZE); + if (!ASSERT_EQ(bytes, GSO_SIZE, "receive packet")) + goto close_accept; + + ret = 0; + +close_accept: + close(afd); +close_client: + close(cfd); +close_server: + close(sfd); +close_netns: + close_netns(nstoken); + + return ret; +} + +static int check_ping_ok(const char *ns1) +{ + SYS(fail, "ip netns exec %s ping -c 1 -W1 -I veth1 %s > /dev/null", ns1, IP4_ADDR_DST); + SYS(fail, "ip netns exec %s ping6 -c 1 -W1 -I veth1 %s > /dev/null", ns1, IP6_ADDR_DST); + return 0; +fail: + return -1; +} + +static int check_ping_fails(const char *ns1) +{ + int ret; + + ret = SYS_NOFAIL("ip netns exec %s ping -c 1 -W1 -I veth1 %s", ns1, IP4_ADDR_DST); + if (!ret) + return -1; + + ret = SYS_NOFAIL("ip netns exec %s ping6 -c 1 -W1 -I veth1 %s", ns1, IP6_ADDR_DST); + if (!ret) + return -1; + + return 0; +} + +#define EGRESS true +#define INGRESS false +#define IPV4_ENCAP true +#define IPV6_ENCAP false +static void lwt_ip_encap(bool ipv4_encap, bool egress, const char *vrf) +{ + char ns1[NETNS_NAME_SIZE] = NETNS_BASE "-1-"; + char ns2[NETNS_NAME_SIZE] = NETNS_BASE "-2-"; + char ns3[NETNS_NAME_SIZE] = NETNS_BASE "-3-"; + char *sec = ipv4_encap ? "encap_gre" : "encap_gre6"; + + if (!vrf) + return; + + if (!ASSERT_OK(create_ns(ns1, NETNS_NAME_SIZE), "create ns1")) + goto out; + if (!ASSERT_OK(create_ns(ns2, NETNS_NAME_SIZE), "create ns2")) + goto out; + if (!ASSERT_OK(create_ns(ns3, NETNS_NAME_SIZE), "create ns3")) + goto out; + + if (!ASSERT_OK(setup_network(ns1, ns2, ns3, vrf), "setup network")) + goto out; + + /* By default, pings work */ + if (!ASSERT_OK(check_ping_ok(ns1), "ping OK")) + goto out; + + /* Remove NS2->DST routes, ping fails */ + SYS(out, "ip -n %s route del %s/32 dev veth3 %s", ns2, IP4_ADDR_DST, vrf); + SYS(out, "ip -n %s -6 route del %s/128 dev veth3 %s", ns2, IP6_ADDR_DST, vrf); + if (!ASSERT_OK(check_ping_fails(ns1), "ping expected fail")) + goto out; + + /* Install replacement routes (LWT/eBPF), pings succeed */ + if (egress) { + SYS(out, "ip -n %s route add %s encap bpf xmit obj %s sec %s dev veth1 %s", + ns1, IP4_ADDR_DST, BPF_FILE, sec, vrf); + SYS(out, "ip -n %s -6 route add %s encap bpf xmit obj %s sec %s dev veth1 %s", + ns1, IP6_ADDR_DST, BPF_FILE, sec, vrf); + } else { + SYS(out, "ip -n %s route add %s encap bpf in obj %s sec %s dev veth2 %s", + ns2, IP4_ADDR_DST, BPF_FILE, sec, vrf); + SYS(out, "ip -n %s -6 route add %s encap bpf in obj %s sec %s dev veth2 %s", + ns2, IP6_ADDR_DST, BPF_FILE, sec, vrf); + } + + if (!ASSERT_OK(check_ping_ok(ns1), "ping OK")) + goto out; + + /* Skip GSO tests with VRF: VRF routing needs properly assigned + * source IP/device, which is easy to do with ping but hard with TCP. + */ + if (egress && !vrf[0]) { + if (!ASSERT_OK(test_gso_fix(ns1, ns3, AF_INET), "test GSO")) + goto out; + } + + /* Negative test: remove routes to GRE devices: ping fails */ + if (!ASSERT_OK(remove_routes_to_gredev(ns1, ns2, vrf), "remove routes to gredev")) + goto out; + if (!ASSERT_OK(check_ping_fails(ns1), "ping expected fail")) + goto out; + + /* Another negative test */ + if (!ASSERT_OK(add_unreachable_routes_to_gredev(ns1, ns2, vrf), + "add unreachable routes")) + goto out; + ASSERT_OK(check_ping_fails(ns1), "ping expected fail"); + +out: + SYS_NOFAIL("ip netns del %s", ns1); + SYS_NOFAIL("ip netns del %s", ns2); + SYS_NOFAIL("ip netns del %s", ns3); +} + +void test_lwt_ip_encap_vrf_ipv6(void) +{ + if (test__start_subtest("egress")) + lwt_ip_encap(IPV6_ENCAP, EGRESS, "vrf red"); + + if (test__start_subtest("ingress")) + lwt_ip_encap(IPV6_ENCAP, INGRESS, "vrf red"); +} + +void test_lwt_ip_encap_vrf_ipv4(void) +{ + if (test__start_subtest("egress")) + lwt_ip_encap(IPV4_ENCAP, EGRESS, "vrf red"); + + if (test__start_subtest("ingress")) + lwt_ip_encap(IPV4_ENCAP, INGRESS, "vrf red"); +} + +void test_lwt_ip_encap_ipv6(void) +{ + if (test__start_subtest("egress")) + lwt_ip_encap(IPV6_ENCAP, EGRESS, ""); + + if (test__start_subtest("ingress")) + lwt_ip_encap(IPV6_ENCAP, INGRESS, ""); +} + +void test_lwt_ip_encap_ipv4(void) +{ + if (test__start_subtest("egress")) + lwt_ip_encap(IPV4_ENCAP, EGRESS, ""); + + if (test__start_subtest("ingress")) + lwt_ip_encap(IPV4_ENCAP, INGRESS, ""); +} diff --git a/tools/testing/selftests/bpf/test_lwt_ip_encap.sh b/tools/testing/selftests/bpf/test_lwt_ip_encap.sh deleted file mode 100755 index 1e565f47aca940d8dc7235d823c48537d7a708b8..0000000000000000000000000000000000000000 --- a/tools/testing/selftests/bpf/test_lwt_ip_encap.sh +++ /dev/null @@ -1,476 +0,0 @@ -#!/bin/bash -# SPDX-License-Identifier: GPL-2.0 -# -# Setup/topology: -# -# NS1 NS2 NS3 -# veth1 <---> veth2 veth3 <---> veth4 (the top route) -# veth5 <---> veth6 veth7 <---> veth8 (the bottom route) -# -# each vethN gets IPv[4|6]_N address -# -# IPv*_SRC = IPv*_1 -# IPv*_DST = IPv*_4 -# -# all tests test pings from IPv*_SRC to IPv*_DST -# -# by default, routes are configured to allow packets to go -# IP*_1 <=> IP*_2 <=> IP*_3 <=> IP*_4 (the top route) -# -# a GRE device is installed in NS3 with IPv*_GRE, and -# NS1/NS2 are configured to route packets to IPv*_GRE via IP*_8 -# (the bottom route) -# -# Tests: -# -# 1. routes NS2->IPv*_DST are brought down, so the only way a ping -# from IP*_SRC to IP*_DST can work is via IPv*_GRE -# -# 2a. in an egress test, a bpf LWT_XMIT program is installed on veth1 -# that encaps the packets with an IP/GRE header to route to IPv*_GRE -# -# ping: SRC->[encap at veth1:egress]->GRE:decap->DST -# ping replies go DST->SRC directly -# -# 2b. in an ingress test, a bpf LWT_IN program is installed on veth2 -# that encaps the packets with an IP/GRE header to route to IPv*_GRE -# -# ping: SRC->[encap at veth2:ingress]->GRE:decap->DST -# ping replies go DST->SRC directly - -BPF_FILE="test_lwt_ip_encap.bpf.o" -if [[ $EUID -ne 0 ]]; then - echo "This script must be run as root" - echo "FAIL" - exit 1 -fi - -readonly NS1="ns1-$(mktemp -u XXXXXX)" -readonly NS2="ns2-$(mktemp -u XXXXXX)" -readonly NS3="ns3-$(mktemp -u XXXXXX)" - -readonly IPv4_1="172.16.1.100" -readonly IPv4_2="172.16.2.100" -readonly IPv4_3="172.16.3.100" -readonly IPv4_4="172.16.4.100" -readonly IPv4_5="172.16.5.100" -readonly IPv4_6="172.16.6.100" -readonly IPv4_7="172.16.7.100" -readonly IPv4_8="172.16.8.100" -readonly IPv4_GRE="172.16.16.100" - -readonly IPv4_SRC=$IPv4_1 -readonly IPv4_DST=$IPv4_4 - -readonly IPv6_1="fb01::1" -readonly IPv6_2="fb02::1" -readonly IPv6_3="fb03::1" -readonly IPv6_4="fb04::1" -readonly IPv6_5="fb05::1" -readonly IPv6_6="fb06::1" -readonly IPv6_7="fb07::1" -readonly IPv6_8="fb08::1" -readonly IPv6_GRE="fb10::1" - -readonly IPv6_SRC=$IPv6_1 -readonly IPv6_DST=$IPv6_4 - -TEST_STATUS=0 -TESTS_SUCCEEDED=0 -TESTS_FAILED=0 - -TMPFILE="" - -process_test_results() -{ - if [[ "${TEST_STATUS}" -eq 0 ]] ; then - echo "PASS" - TESTS_SUCCEEDED=$((TESTS_SUCCEEDED+1)) - else - echo "FAIL" - TESTS_FAILED=$((TESTS_FAILED+1)) - fi -} - -print_test_summary_and_exit() -{ - echo "passed tests: ${TESTS_SUCCEEDED}" - echo "failed tests: ${TESTS_FAILED}" - if [ "${TESTS_FAILED}" -eq "0" ] ; then - exit 0 - else - exit 1 - fi -} - -setup() -{ - set -e # exit on error - TEST_STATUS=0 - - # create devices and namespaces - ip netns add "${NS1}" - ip netns add "${NS2}" - ip netns add "${NS3}" - - # rp_filter gets confused by what these tests are doing, so disable it - ip netns exec ${NS1} sysctl -wq net.ipv4.conf.all.rp_filter=0 - ip netns exec ${NS2} sysctl -wq net.ipv4.conf.all.rp_filter=0 - ip netns exec ${NS3} sysctl -wq net.ipv4.conf.all.rp_filter=0 - ip netns exec ${NS1} sysctl -wq net.ipv4.conf.default.rp_filter=0 - ip netns exec ${NS2} sysctl -wq net.ipv4.conf.default.rp_filter=0 - ip netns exec ${NS3} sysctl -wq net.ipv4.conf.default.rp_filter=0 - - # disable IPv6 DAD because it sometimes takes too long and fails tests - ip netns exec ${NS1} sysctl -wq net.ipv6.conf.all.accept_dad=0 - ip netns exec ${NS2} sysctl -wq net.ipv6.conf.all.accept_dad=0 - ip netns exec ${NS3} sysctl -wq net.ipv6.conf.all.accept_dad=0 - ip netns exec ${NS1} sysctl -wq net.ipv6.conf.default.accept_dad=0 - ip netns exec ${NS2} sysctl -wq net.ipv6.conf.default.accept_dad=0 - ip netns exec ${NS3} sysctl -wq net.ipv6.conf.default.accept_dad=0 - - ip link add veth1 type veth peer name veth2 - ip link add veth3 type veth peer name veth4 - ip link add veth5 type veth peer name veth6 - ip link add veth7 type veth peer name veth8 - - ip netns exec ${NS2} sysctl -wq net.ipv4.ip_forward=1 - ip netns exec ${NS2} sysctl -wq net.ipv6.conf.all.forwarding=1 - - ip link set veth1 netns ${NS1} - ip link set veth2 netns ${NS2} - ip link set veth3 netns ${NS2} - ip link set veth4 netns ${NS3} - ip link set veth5 netns ${NS1} - ip link set veth6 netns ${NS2} - ip link set veth7 netns ${NS2} - ip link set veth8 netns ${NS3} - - if [ ! -z "${VRF}" ] ; then - ip -netns ${NS1} link add red type vrf table 1001 - ip -netns ${NS1} link set red up - ip -netns ${NS1} route add table 1001 unreachable default metric 8192 - ip -netns ${NS1} -6 route add table 1001 unreachable default metric 8192 - ip -netns ${NS1} link set veth1 vrf red - ip -netns ${NS1} link set veth5 vrf red - - ip -netns ${NS2} link add red type vrf table 1001 - ip -netns ${NS2} link set red up - ip -netns ${NS2} route add table 1001 unreachable default metric 8192 - ip -netns ${NS2} -6 route add table 1001 unreachable default metric 8192 - ip -netns ${NS2} link set veth2 vrf red - ip -netns ${NS2} link set veth3 vrf red - ip -netns ${NS2} link set veth6 vrf red - ip -netns ${NS2} link set veth7 vrf red - fi - - # configure addesses: the top route (1-2-3-4) - ip -netns ${NS1} addr add ${IPv4_1}/24 dev veth1 - ip -netns ${NS2} addr add ${IPv4_2}/24 dev veth2 - ip -netns ${NS2} addr add ${IPv4_3}/24 dev veth3 - ip -netns ${NS3} addr add ${IPv4_4}/24 dev veth4 - ip -netns ${NS1} -6 addr add ${IPv6_1}/128 nodad dev veth1 - ip -netns ${NS2} -6 addr add ${IPv6_2}/128 nodad dev veth2 - ip -netns ${NS2} -6 addr add ${IPv6_3}/128 nodad dev veth3 - ip -netns ${NS3} -6 addr add ${IPv6_4}/128 nodad dev veth4 - - # configure addresses: the bottom route (5-6-7-8) - ip -netns ${NS1} addr add ${IPv4_5}/24 dev veth5 - ip -netns ${NS2} addr add ${IPv4_6}/24 dev veth6 - ip -netns ${NS2} addr add ${IPv4_7}/24 dev veth7 - ip -netns ${NS3} addr add ${IPv4_8}/24 dev veth8 - ip -netns ${NS1} -6 addr add ${IPv6_5}/128 nodad dev veth5 - ip -netns ${NS2} -6 addr add ${IPv6_6}/128 nodad dev veth6 - ip -netns ${NS2} -6 addr add ${IPv6_7}/128 nodad dev veth7 - ip -netns ${NS3} -6 addr add ${IPv6_8}/128 nodad dev veth8 - - ip -netns ${NS1} link set dev veth1 up - ip -netns ${NS2} link set dev veth2 up - ip -netns ${NS2} link set dev veth3 up - ip -netns ${NS3} link set dev veth4 up - ip -netns ${NS1} link set dev veth5 up - ip -netns ${NS2} link set dev veth6 up - ip -netns ${NS2} link set dev veth7 up - ip -netns ${NS3} link set dev veth8 up - - # configure routes: IP*_SRC -> veth1/IP*_2 (= top route) default; - # the bottom route to specific bottom addresses - - # NS1 - # top route - ip -netns ${NS1} route add ${IPv4_2}/32 dev veth1 ${VRF} - ip -netns ${NS1} route add default dev veth1 via ${IPv4_2} ${VRF} # go top by default - ip -netns ${NS1} -6 route add ${IPv6_2}/128 dev veth1 ${VRF} - ip -netns ${NS1} -6 route add default dev veth1 via ${IPv6_2} ${VRF} # go top by default - # bottom route - ip -netns ${NS1} route add ${IPv4_6}/32 dev veth5 ${VRF} - ip -netns ${NS1} route add ${IPv4_7}/32 dev veth5 via ${IPv4_6} ${VRF} - ip -netns ${NS1} route add ${IPv4_8}/32 dev veth5 via ${IPv4_6} ${VRF} - ip -netns ${NS1} -6 route add ${IPv6_6}/128 dev veth5 ${VRF} - ip -netns ${NS1} -6 route add ${IPv6_7}/128 dev veth5 via ${IPv6_6} ${VRF} - ip -netns ${NS1} -6 route add ${IPv6_8}/128 dev veth5 via ${IPv6_6} ${VRF} - - # NS2 - # top route - ip -netns ${NS2} route add ${IPv4_1}/32 dev veth2 ${VRF} - ip -netns ${NS2} route add ${IPv4_4}/32 dev veth3 ${VRF} - ip -netns ${NS2} -6 route add ${IPv6_1}/128 dev veth2 ${VRF} - ip -netns ${NS2} -6 route add ${IPv6_4}/128 dev veth3 ${VRF} - # bottom route - ip -netns ${NS2} route add ${IPv4_5}/32 dev veth6 ${VRF} - ip -netns ${NS2} route add ${IPv4_8}/32 dev veth7 ${VRF} - ip -netns ${NS2} -6 route add ${IPv6_5}/128 dev veth6 ${VRF} - ip -netns ${NS2} -6 route add ${IPv6_8}/128 dev veth7 ${VRF} - - # NS3 - # top route - ip -netns ${NS3} route add ${IPv4_3}/32 dev veth4 - ip -netns ${NS3} route add ${IPv4_1}/32 dev veth4 via ${IPv4_3} - ip -netns ${NS3} route add ${IPv4_2}/32 dev veth4 via ${IPv4_3} - ip -netns ${NS3} -6 route add ${IPv6_3}/128 dev veth4 - ip -netns ${NS3} -6 route add ${IPv6_1}/128 dev veth4 via ${IPv6_3} - ip -netns ${NS3} -6 route add ${IPv6_2}/128 dev veth4 via ${IPv6_3} - # bottom route - ip -netns ${NS3} route add ${IPv4_7}/32 dev veth8 - ip -netns ${NS3} route add ${IPv4_5}/32 dev veth8 via ${IPv4_7} - ip -netns ${NS3} route add ${IPv4_6}/32 dev veth8 via ${IPv4_7} - ip -netns ${NS3} -6 route add ${IPv6_7}/128 dev veth8 - ip -netns ${NS3} -6 route add ${IPv6_5}/128 dev veth8 via ${IPv6_7} - ip -netns ${NS3} -6 route add ${IPv6_6}/128 dev veth8 via ${IPv6_7} - - # configure IPv4 GRE device in NS3, and a route to it via the "bottom" route - ip -netns ${NS3} tunnel add gre_dev mode gre remote ${IPv4_1} local ${IPv4_GRE} ttl 255 - ip -netns ${NS3} link set gre_dev up - ip -netns ${NS3} addr add ${IPv4_GRE} dev gre_dev - ip -netns ${NS1} route add ${IPv4_GRE}/32 dev veth5 via ${IPv4_6} ${VRF} - ip -netns ${NS2} route add ${IPv4_GRE}/32 dev veth7 via ${IPv4_8} ${VRF} - - - # configure IPv6 GRE device in NS3, and a route to it via the "bottom" route - ip -netns ${NS3} -6 tunnel add name gre6_dev mode ip6gre remote ${IPv6_1} local ${IPv6_GRE} ttl 255 - ip -netns ${NS3} link set gre6_dev up - ip -netns ${NS3} -6 addr add ${IPv6_GRE} nodad dev gre6_dev - ip -netns ${NS1} -6 route add ${IPv6_GRE}/128 dev veth5 via ${IPv6_6} ${VRF} - ip -netns ${NS2} -6 route add ${IPv6_GRE}/128 dev veth7 via ${IPv6_8} ${VRF} - - TMPFILE=$(mktemp /tmp/test_lwt_ip_encap.XXXXXX) - - sleep 1 # reduce flakiness - set +e -} - -cleanup() -{ - if [ -f ${TMPFILE} ] ; then - rm ${TMPFILE} - fi - - ip netns del ${NS1} 2> /dev/null - ip netns del ${NS2} 2> /dev/null - ip netns del ${NS3} 2> /dev/null -} - -trap cleanup EXIT - -remove_routes_to_gredev() -{ - ip -netns ${NS1} route del ${IPv4_GRE} dev veth5 ${VRF} - ip -netns ${NS2} route del ${IPv4_GRE} dev veth7 ${VRF} - ip -netns ${NS1} -6 route del ${IPv6_GRE}/128 dev veth5 ${VRF} - ip -netns ${NS2} -6 route del ${IPv6_GRE}/128 dev veth7 ${VRF} -} - -add_unreachable_routes_to_gredev() -{ - ip -netns ${NS1} route add unreachable ${IPv4_GRE}/32 ${VRF} - ip -netns ${NS2} route add unreachable ${IPv4_GRE}/32 ${VRF} - ip -netns ${NS1} -6 route add unreachable ${IPv6_GRE}/128 ${VRF} - ip -netns ${NS2} -6 route add unreachable ${IPv6_GRE}/128 ${VRF} -} - -test_ping() -{ - local readonly PROTO=$1 - local readonly EXPECTED=$2 - local RET=0 - - if [ "${PROTO}" == "IPv4" ] ; then - ip netns exec ${NS1} ping -c 1 -W 1 -I veth1 ${IPv4_DST} 2>&1 > /dev/null - RET=$? - elif [ "${PROTO}" == "IPv6" ] ; then - ip netns exec ${NS1} ping6 -c 1 -W 1 -I veth1 ${IPv6_DST} 2>&1 > /dev/null - RET=$? - else - echo " test_ping: unknown PROTO: ${PROTO}" - TEST_STATUS=1 - fi - - if [ "0" != "${RET}" ]; then - RET=1 - fi - - if [ "${EXPECTED}" != "${RET}" ] ; then - echo " test_ping failed: expected: ${EXPECTED}; got ${RET}" - TEST_STATUS=1 - fi -} - -test_gso() -{ - local readonly PROTO=$1 - local readonly PKT_SZ=5000 - local IP_DST="" - : > ${TMPFILE} # trim the capture file - - # check that nc is present - command -v nc >/dev/null 2>&1 || \ - { echo >&2 "nc is not available: skipping TSO tests"; return; } - - # listen on port 9000, capture TCP into $TMPFILE - if [ "${PROTO}" == "IPv4" ] ; then - IP_DST=${IPv4_DST} - ip netns exec ${NS3} bash -c \ - "nc -4 -l -p 9000 > ${TMPFILE} &" - elif [ "${PROTO}" == "IPv6" ] ; then - IP_DST=${IPv6_DST} - ip netns exec ${NS3} bash -c \ - "nc -6 -l -p 9000 > ${TMPFILE} &" - RET=$? - else - echo " test_gso: unknown PROTO: ${PROTO}" - TEST_STATUS=1 - fi - sleep 1 # let nc start listening - - # send a packet larger than MTU - ip netns exec ${NS1} bash -c \ - "dd if=/dev/zero bs=$PKT_SZ count=1 > /dev/tcp/${IP_DST}/9000 2>/dev/null" - sleep 2 # let the packet get delivered - - # verify we received all expected bytes - SZ=$(stat -c %s ${TMPFILE}) - if [ "$SZ" != "$PKT_SZ" ] ; then - echo " test_gso failed: ${PROTO}" - TEST_STATUS=1 - fi -} - -test_egress() -{ - local readonly ENCAP=$1 - echo "starting egress ${ENCAP} encap test ${VRF}" - setup - - # by default, pings work - test_ping IPv4 0 - test_ping IPv6 0 - - # remove NS2->DST routes, ping fails - ip -netns ${NS2} route del ${IPv4_DST}/32 dev veth3 ${VRF} - ip -netns ${NS2} -6 route del ${IPv6_DST}/128 dev veth3 ${VRF} - test_ping IPv4 1 - test_ping IPv6 1 - - # install replacement routes (LWT/eBPF), pings succeed - if [ "${ENCAP}" == "IPv4" ] ; then - ip -netns ${NS1} route add ${IPv4_DST} encap bpf xmit obj \ - ${BPF_FILE} sec encap_gre dev veth1 ${VRF} - ip -netns ${NS1} -6 route add ${IPv6_DST} encap bpf xmit obj \ - ${BPF_FILE} sec encap_gre dev veth1 ${VRF} - elif [ "${ENCAP}" == "IPv6" ] ; then - ip -netns ${NS1} route add ${IPv4_DST} encap bpf xmit obj \ - ${BPF_FILE} sec encap_gre6 dev veth1 ${VRF} - ip -netns ${NS1} -6 route add ${IPv6_DST} encap bpf xmit obj \ - ${BPF_FILE} sec encap_gre6 dev veth1 ${VRF} - else - echo " unknown encap ${ENCAP}" - TEST_STATUS=1 - fi - test_ping IPv4 0 - test_ping IPv6 0 - - # skip GSO tests with VRF: VRF routing needs properly assigned - # source IP/device, which is easy to do with ping and hard with dd/nc. - if [ -z "${VRF}" ] ; then - test_gso IPv4 - test_gso IPv6 - fi - - # a negative test: remove routes to GRE devices: ping fails - remove_routes_to_gredev - test_ping IPv4 1 - test_ping IPv6 1 - - # another negative test - add_unreachable_routes_to_gredev - test_ping IPv4 1 - test_ping IPv6 1 - - cleanup - process_test_results -} - -test_ingress() -{ - local readonly ENCAP=$1 - echo "starting ingress ${ENCAP} encap test ${VRF}" - setup - - # need to wait a bit for IPv6 to autoconf, otherwise - # ping6 sometimes fails with "unable to bind to address" - - # by default, pings work - test_ping IPv4 0 - test_ping IPv6 0 - - # remove NS2->DST routes, pings fail - ip -netns ${NS2} route del ${IPv4_DST}/32 dev veth3 ${VRF} - ip -netns ${NS2} -6 route del ${IPv6_DST}/128 dev veth3 ${VRF} - test_ping IPv4 1 - test_ping IPv6 1 - - # install replacement routes (LWT/eBPF), pings succeed - if [ "${ENCAP}" == "IPv4" ] ; then - ip -netns ${NS2} route add ${IPv4_DST} encap bpf in obj \ - ${BPF_FILE} sec encap_gre dev veth2 ${VRF} - ip -netns ${NS2} -6 route add ${IPv6_DST} encap bpf in obj \ - ${BPF_FILE} sec encap_gre dev veth2 ${VRF} - elif [ "${ENCAP}" == "IPv6" ] ; then - ip -netns ${NS2} route add ${IPv4_DST} encap bpf in obj \ - ${BPF_FILE} sec encap_gre6 dev veth2 ${VRF} - ip -netns ${NS2} -6 route add ${IPv6_DST} encap bpf in obj \ - ${BPF_FILE} sec encap_gre6 dev veth2 ${VRF} - else - echo "FAIL: unknown encap ${ENCAP}" - TEST_STATUS=1 - fi - test_ping IPv4 0 - test_ping IPv6 0 - - # a negative test: remove routes to GRE devices: ping fails - remove_routes_to_gredev - test_ping IPv4 1 - test_ping IPv6 1 - - # another negative test - add_unreachable_routes_to_gredev - test_ping IPv4 1 - test_ping IPv6 1 - - cleanup - process_test_results -} - -VRF="" -test_egress IPv4 -test_egress IPv6 -test_ingress IPv4 -test_ingress IPv6 - -VRF="vrf red" -test_egress IPv4 -test_egress IPv6 -test_ingress IPv4 -test_ingress IPv6 - -print_test_summary_and_exit --- base-commit: 5fd21aaac37919abc5c5d0df1eb06a9f02518f27 change-id: 20250206-lwt_ip-b6a91d2787bf Best regards, -- Bastien Curutchet (eBPF Foundation) <bastien.curutchet(a)bootlin.com>

6 months, 1 week

2
1
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[PATCH] selftests/nolibc: stop testing constructor order

by Thomas Weißschuh

The execution order of constructors in undefined and depends on the toolchain. While recent toolchains seems to have a stable order, it doesn't work for older ones and may also change at any time. Stop validating the order and instead only validate that all constructors are executed. Reported-by: Willy Tarreau <w(a)1wt.eu> Closes: https://lore.kernel.org/lkml/20250301110735.GA18621@1wt.eu/ Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- tools/testing/selftests/nolibc/nolibc-test-linkage.c | 6 +++--- tools/testing/selftests/nolibc/nolibc-test.c | 8 ++++---- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/tools/testing/selftests/nolibc/nolibc-test-linkage.c b/tools/testing/selftests/nolibc/nolibc-test-linkage.c index 5ff4c8a1db2a46cf3f8cb55bdabaa5e8819b344c..a7ca8325863face9cd4134a717fe4c7761bdeb7f 100644 --- a/tools/testing/selftests/nolibc/nolibc-test-linkage.c +++ b/tools/testing/selftests/nolibc/nolibc-test-linkage.c @@ -11,16 +11,16 @@ void *linkage_test_errno_addr(void) return &errno; } -int linkage_test_constructor_test_value; +int linkage_test_constructor_test_value = 0; __attribute__((constructor)) static void constructor1(void) { - linkage_test_constructor_test_value = 2; + linkage_test_constructor_test_value |= 1 << 0; } __attribute__((constructor)) static void constructor2(void) { - linkage_test_constructor_test_value *= 3; + linkage_test_constructor_test_value |= 1 << 1; } diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index a5abf16dbfe0f2aed286964fdfc391bc6201ef3b..5884a891c491544050fc35b07322c73a1a9dbaf3 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -692,14 +692,14 @@ int expect_strtox(int llen, void *func, const char *input, int base, intmax_t ex __attribute__((constructor)) static void constructor1(void) { - constructor_test_value = 1; + constructor_test_value |= 1 << 0; } __attribute__((constructor)) static void constructor2(int argc, char **argv, char **envp) { if (argc && argv && envp) - constructor_test_value *= 2; + constructor_test_value |= 1 << 1; } int run_startup(int min, int max) @@ -738,9 +738,9 @@ int run_startup(int min, int max) CASE_TEST(environ_HOME); EXPECT_PTRNZ(1, getenv("HOME")); break; CASE_TEST(auxv_addr); EXPECT_PTRGT(test_auxv != (void *)-1, test_auxv, brk); break; CASE_TEST(auxv_AT_UID); EXPECT_EQ(1, getauxval(AT_UID), getuid()); break; - CASE_TEST(constructor); EXPECT_EQ(is_nolibc, constructor_test_value, 2); break; + CASE_TEST(constructor); EXPECT_EQ(is_nolibc, constructor_test_value, 0x3); break; CASE_TEST(linkage_errno); EXPECT_PTREQ(1, linkage_test_errno_addr(), &errno); break; - CASE_TEST(linkage_constr); EXPECT_EQ(is_nolibc, linkage_test_constructor_test_value, 6); break; + CASE_TEST(linkage_constr); EXPECT_EQ(1, linkage_test_constructor_test_value, 0x3); break; case __LINE__: return ret; /* must be last */ /* note: do not set any defaults so as to permit holes above */ --- base-commit: 6e406202a44a1a37176da0333cec10d5320c4b33 change-id: 20250306-nolibc-constructor-order-6921e8c93591 Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

6 months, 1 week

2
1
0 0

[PATCH v2] selftests: livepatch: test if ftrace can trace a livepatched function

by Filipe Xavier

This new test makes sure that ftrace can trace a function that was introduced by a livepatch. Signed-off-by: Filipe Xavier <felipeaggger(a)gmail.com> --- Changes in v2: - functions.sh: added reset tracing on push and pop_config. - test-ftrace.sh: enabled tracing_on before test init. - nitpick: added double quotations on filenames and fixed some wording. - Link to v1: https://lore.kernel.org/r/20250102-ftrace-selftest-livepatch-v1-1-84880baef… --- tools/testing/selftests/livepatch/functions.sh | 14 ++++++++++ tools/testing/selftests/livepatch/test-ftrace.sh | 33 ++++++++++++++++++++++++ 2 files changed, 47 insertions(+) diff --git a/tools/testing/selftests/livepatch/functions.sh b/tools/testing/selftests/livepatch/functions.sh index e5d06fb402335d85959bafe099087effc6ddce12..e6c13514002dae5f8d7461f90b8241ab43024ea4 100644 --- a/tools/testing/selftests/livepatch/functions.sh +++ b/tools/testing/selftests/livepatch/functions.sh @@ -62,6 +62,9 @@ function push_config() { awk -F'[: ]' '{print "file " $1 " line " $2 " " $4}') FTRACE_ENABLED=$(sysctl --values kernel.ftrace_enabled) KPROBE_ENABLED=$(cat "$SYSFS_KPROBES_DIR/enabled") + TRACING_ON=$(cat "$SYSFS_DEBUG_DIR/tracing/tracing_on") + CURRENT_TRACER=$(cat "$SYSFS_DEBUG_DIR/tracing/current_tracer") + FTRACE_FILTER=$(cat "$SYSFS_DEBUG_DIR/tracing/set_ftrace_filter") } function pop_config() { @@ -74,6 +77,17 @@ function pop_config() { if [[ -n "$KPROBE_ENABLED" ]]; then echo "$KPROBE_ENABLED" > "$SYSFS_KPROBES_DIR/enabled" fi + if [[ -n "$TRACING_ON" ]]; then + echo "$TRACING_ON" > "$SYSFS_DEBUG_DIR/tracing/tracing_on" + fi + if [[ -n "$CURRENT_TRACER" ]]; then + echo "$CURRENT_TRACER" > "$SYSFS_DEBUG_DIR/tracing/current_tracer" + fi + if [[ "$FTRACE_FILTER" == *"#"* ]]; then + echo > "$SYSFS_DEBUG_DIR/tracing/set_ftrace_filter" + elif [[ -n "$FTRACE_FILTER" ]]; then + echo "$FTRACE_FILTER" > "$SYSFS_DEBUG_DIR/tracing/set_ftrace_filter" + fi } function set_dynamic_debug() { diff --git a/tools/testing/selftests/livepatch/test-ftrace.sh b/tools/testing/selftests/livepatch/test-ftrace.sh index fe14f248913acbec46fb6c0fec38a2fc84209d39..66af5d726c52e48e5177804e182b4ff31784d5ac 100755 --- a/tools/testing/selftests/livepatch/test-ftrace.sh +++ b/tools/testing/selftests/livepatch/test-ftrace.sh @@ -61,4 +61,37 @@ livepatch: '$MOD_LIVEPATCH': unpatching complete % rmmod $MOD_LIVEPATCH" +# - verify livepatch can load +# - check if traces have a patched function +# - unload livepatch and reset trace + +start_test "trace livepatched function and check that the live patch remains in effect" + +TRACE_FILE="$SYSFS_DEBUG_DIR/tracing/trace" +FUNCTION_NAME="livepatch_cmdline_proc_show" + +load_lp $MOD_LIVEPATCH + +echo 1 > "$SYSFS_DEBUG_DIR/tracing/tracing_on" +echo $FUNCTION_NAME > "$SYSFS_DEBUG_DIR/tracing/set_ftrace_filter" +echo "function" > "$SYSFS_DEBUG_DIR/tracing/current_tracer" +echo "" > "$TRACE_FILE" + +if [[ "$(cat /proc/cmdline)" != "$MOD_LIVEPATCH: this has been live patched" ]] ; then + echo -e "FAIL\n\n" + die "livepatch kselftest(s) failed" +fi + +grep -q $FUNCTION_NAME "$TRACE_FILE" +FOUND=$? + +disable_lp $MOD_LIVEPATCH +unload_lp $MOD_LIVEPATCH + +if [ "$FOUND" -eq 1 ]; then + echo -e "FAIL\n\n" + die "livepatch kselftest(s) failed" +fi + + exit 0 --- base-commit: fc033cf25e612e840e545f8d5ad2edd6ba613ed5 change-id: 20250101-ftrace-selftest-livepatch-161fb77dbed8 Best regards, -- Filipe Xavier <felipeaggger(a)gmail.com>

6 months, 1 week

4
4
0 0

[PATCH v3 1/5] tools/nolibc: add support for openat(2)

by Louis Taylor

openat is useful to avoid needing to construct relative paths, so expose a wrapper for using it directly. Signed-off-by: Louis Taylor <louis(a)kragniz.eu> --- tools/include/nolibc/sys.h | 25 ++++++++++++++++++++ tools/testing/selftests/nolibc/nolibc-test.c | 17 +++++++++++++ 2 files changed, 42 insertions(+) diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h index 8f44c33b1213..3cd938f9abda 100644 --- a/tools/include/nolibc/sys.h +++ b/tools/include/nolibc/sys.h @@ -765,6 +765,31 @@ int mount(const char *src, const char *tgt, return __sysret(sys_mount(src, tgt, fst, flags, data)); } +/* + * int openat(int dirfd, const char *path, int flags[, mode_t mode]); + */ + +static __attribute__((unused)) +int sys_openat(int dirfd, const char *path, int flags, mode_t mode) +{ + return my_syscall4(__NR_openat, dirfd, path, flags, mode); +} + +static __attribute__((unused)) +int openat(int dirfd, const char *path, int flags, ...) +{ + mode_t mode = 0; + + if (flags & O_CREAT) { + va_list args; + + va_start(args, flags); + mode = va_arg(args, mode_t); + va_end(args); + } + + return __sysret(sys_openat(dirfd, path, flags, mode)); +} /* * int open(const char *path, int flags[, mode_t mode]); diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 79c3e6a845f3..e8faddcecf9d 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -1028,6 +1028,22 @@ int test_rlimit(void) return 0; } +int test_openat(void) +{ + int dev, null; + + dev = openat(AT_FDCWD, "/dev", O_DIRECTORY); + if (dev < 0) + return -1; + + null = openat(dev, "null", O_RDONLY); + close(dev); + if (null < 0) + return -1; + + close(null); + return 0; +} /* Run syscall tests between IDs <min> and <max>. * Return 0 on success, non-zero on failure. @@ -1116,6 +1132,7 @@ int run_syscall(int min, int max) CASE_TEST(mmap_munmap_good); EXPECT_SYSZR(1, test_mmap_munmap()); break; CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break; CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break; + CASE_TEST(openat_dir); EXPECT_SYSZR(1, test_openat()); break; CASE_TEST(pipe); EXPECT_SYSZR(1, test_pipe()); break; CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break; CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break; -- 2.45.2

6 months, 1 week

2
2
0 0

[PATCH bpf-next v5 0/6] XDP metadata support for tun driver

by Marcus Wichelmann

Hi all, this v5 of the patch series is very similar to v4, but rebased onto the bpf-next/net branch instead of bpf-next/master. Because the commit c047e0e0e435 ("selftests/bpf: Optionally open a dedicated namespace to run test in it") is not yet included in this branch, I changed the xdp_context_tuntap test to manually create a namespace to run the test in. Not so successful pipeline: https://github.com/kernel-patches/bpf/actions/runs/13682405154 The CI pipeline failed because of veristat changes in seemingly unrelated eBPF programs. I don't think this has to do with the changes from this patch series, but if it does, please let me know what I may have to do different to make the CI pass. --- v5: - rebase onto bpf-next/net - resolve rebase conflicts - change xdp_context_tuntap test to manually create and open a network namespace using netns_new v4: https://lore.kernel.org/bpf/20250227142330.1605996-1-marcus.wichelmann@hetz… - strip unrelated changes from the selftest patches - extend commit message for "selftests/bpf: refactor xdp_context_functional test and bpf program" - the NOARP flag was not effective to prevent other packets from interfering with the tests, add a filter to the XDP program instead - run xdp_context_tuntap in a separate namespace to avoid conflicts with other tests v3: https://lore.kernel.org/bpf/20250224152909.3911544-1-marcus.wichelmann@hetz… - change the condition to handle xdp_buffs without metadata support, as suggested by Willem de Bruijn <willemb(a)google.com> - add clarifying comment why that condition is needed - set NOARP flag in selftests to ensure that the kernel does not send packets on the test interfaces that may interfere with the tests v2: https://lore.kernel.org/bpf/20250217172308.3291739-1-marcus.wichelmann@hetz… - submit against bpf-next subtree - split commits and improved commit messages - remove redundant metasize check and add clarifying comment instead - use max() instead of ternary operator - add selftest for metadata support in the tun driver v1: https://lore.kernel.org/all/20250130171614.1657224-1-marcus.wichelmann@hetz… Marcus Wichelmann (6): net: tun: enable XDP metadata support net: tun: enable transfer of XDP metadata to skb selftests/bpf: move open_tuntap to network helpers selftests/bpf: refactor xdp_context_functional test and bpf program selftests/bpf: add test for XDP metadata support in tun driver selftests/bpf: fix file descriptor assertion in open_tuntap helper drivers/net/tun.c | 28 +++- tools/testing/selftests/bpf/network_helpers.c | 28 ++++ tools/testing/selftests/bpf/network_helpers.h | 3 + .../selftests/bpf/prog_tests/lwt_helpers.h | 29 ---- .../bpf/prog_tests/xdp_context_test_run.c | 145 +++++++++++++++++- .../selftests/bpf/progs/test_xdp_meta.c | 53 +++++-- 6 files changed, 230 insertions(+), 56 deletions(-) -- 2.43.0

6 months, 1 week

2
7
0 0

[PATCH v2 1/5] tools/nolibc: add support for openat(2)

by Louis Taylor

openat is useful to avoid needing to construct relative paths, so expose a wrapper for using it directly. Signed-off-by: Louis Taylor <louis(a)kragniz.eu> --- tools/include/nolibc/sys.h | 25 ++++++++++++++++++++ tools/testing/selftests/nolibc/nolibc-test.c | 21 ++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h index 8f44c33b1213..3cd938f9abda 100644 --- a/tools/include/nolibc/sys.h +++ b/tools/include/nolibc/sys.h @@ -765,6 +765,31 @@ int mount(const char *src, const char *tgt, return __sysret(sys_mount(src, tgt, fst, flags, data)); } +/* + * int openat(int dirfd, const char *path, int flags[, mode_t mode]); + */ + +static __attribute__((unused)) +int sys_openat(int dirfd, const char *path, int flags, mode_t mode) +{ + return my_syscall4(__NR_openat, dirfd, path, flags, mode); +} + +static __attribute__((unused)) +int openat(int dirfd, const char *path, int flags, ...) +{ + mode_t mode = 0; + + if (flags & O_CREAT) { + va_list args; + + va_start(args, flags); + mode = va_arg(args, mode_t); + va_end(args); + } + + return __sysret(sys_openat(dirfd, path, flags, mode)); +} /* * int open(const char *path, int flags[, mode_t mode]); diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 79c3e6a845f3..2a1629938dd6 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -1028,6 +1028,26 @@ int test_rlimit(void) return 0; } +static int test_openat(void) +{ + int dev; + int null; + + dev = openat(AT_FDCWD, "/dev", O_DIRECTORY); + if (dev < 0) + return -1; + + null = openat(dev, "null", 0); + if (null < 0) { + close(dev); + return -1; + } + + close(dev); + close(null); + + return 0; +} /* Run syscall tests between IDs <min> and <max>. * Return 0 on success, non-zero on failure. @@ -1116,6 +1136,7 @@ int run_syscall(int min, int max) CASE_TEST(mmap_munmap_good); EXPECT_SYSZR(1, test_mmap_munmap()); break; CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break; CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break; + CASE_TEST(openat_dir); EXPECT_SYSNE(1, test_openat(), -1); break; CASE_TEST(pipe); EXPECT_SYSZR(1, test_pipe()); break; CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break; CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break; -- 2.45.2

6 months, 1 week

3
8
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[PATCH] kunit: tool: Fix bug in parsing test plan

by Rae Moar

A bug was identified where the KTAP below caused an infinite loop: TAP version 13 ok 4 test_case 1..4 The infinite loop was caused by the parser not parsing a test plan if following a test result line. Fix bug to correctly parse test plan and add error if test plan is missing. Signed-off-by: Rae Moar <rmoar(a)google.com> --- tools/testing/kunit/kunit_parser.py | 12 +++++++----- tools/testing/kunit/kunit_tool_test.py | 5 ++--- 2 files changed, 9 insertions(+), 8 deletions(-) diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py index 29fc27e8949b..5dcbc670e1dc 100644 --- a/tools/testing/kunit/kunit_parser.py +++ b/tools/testing/kunit/kunit_parser.py @@ -761,20 +761,22 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: test.name = "main" ktap_line = parse_ktap_header(lines, test, printer) test.log.extend(parse_diagnostic(lines)) - parse_test_plan(lines, test) + plan_line = parse_test_plan(lines, test) parent_test = True else: # If not the main test, attempt to parse a test header containing # the KTAP version line and/or subtest header line ktap_line = parse_ktap_header(lines, test, printer) subtest_line = parse_test_header(lines, test) + test.log.extend(parse_diagnostic(lines)) + plan_line = parse_test_plan(lines, test) parent_test = (ktap_line or subtest_line) if parent_test: - # If KTAP version line and/or subtest header is found, attempt - # to parse test plan and print test header - test.log.extend(parse_diagnostic(lines)) - parse_test_plan(lines, test) print_test_header(test, printer) + + if parent_test and not plan_line: + test.add_error(printer, 'missing test plan!') + expected_count = test.expected_count subtests = [] test_num = 1 diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py index 0bcb0cc002f8..e1e142c1a850 100755 --- a/tools/testing/kunit/kunit_tool_test.py +++ b/tools/testing/kunit/kunit_tool_test.py @@ -181,8 +181,7 @@ class KUnitParserTest(unittest.TestCase): result = kunit_parser.parse_run_tests( kunit_parser.extract_tap_lines( file.readlines()), stdout) - # A missing test plan is not an error. - self.assertEqual(result.counts, kunit_parser.TestCounts(passed=10, errors=0)) + self.assertEqual(result.counts, kunit_parser.TestCounts(passed=10, errors=2)) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) def test_no_tests(self): @@ -203,7 +202,7 @@ class KUnitParserTest(unittest.TestCase): self.assertEqual( kunit_parser.TestStatus.NO_TESTS, result.subtests[0].subtests[0].status) - self.assertEqual(result.counts, kunit_parser.TestCounts(passed=1, errors=1)) + self.assertEqual(result.counts, kunit_parser.TestCounts(passed=1, errors=2)) def test_no_kunit_output(self): base-commit: 0619a4868fc1b32b07fb9ed6c69adc5e5cf4e4b2 -- 2.48.1.711.g2feabab25a-goog

6 months, 1 week

3
5
0 0

[PATCH v8 0/4] scanf: convert self-test to KUnit

by Tamir Duberstein

This is one of just 3 remaining "Test Module" kselftests (the others being bitmap and printf), the rest having been converted to KUnit. In addition to the enclosed patch, please consider this an RFC on the removal of the "Test Module" kselftest machinery. I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 scanf Failure output before this series: [ 383.100048] test_scanf: vsscanf("1574 9 64ca 935b 7 142d ff58 0", "%4hx %1hx %4hx %4hx %1hx %4hx %4hx %1hx", ...) expected 2472240330 got 1690959881 [ 383.102843] test_scanf: vsscanf("f12:2:d:2:c166:1:36b:1906", "%3hx:%1hx:%1hx:%1hx:%4hx:%1hx:%3hx:%4hx", ...) expected 131085 got 851970 [ 383.105376] test_scanf: vsscanf("4,b2fe,3,593,6,0,3bde,0", "%1hx,%4hx,%1hx,%3hx,%1hx,%1hx,%4hx,%1hx", ...) expected 93519875 got 242430 [ 383.105659] test_scanf: vsscanf("6-1-2-1-d9e6-f-93e-e567", "%1hx-%1hx-%1hx-%1hx-%4hx-%1hx-%3hx-%4hx", ...) expected 65538 got 131073 [ 383.106127] test_scanf: vsscanf("72d6/35/e88d/1/0/6c8c/7/1", "%4hx/%2hx/%4hx/%1hx/%1hx/%4hx/%1hx/%1hx", ...) expected 125069 got 3901554741 [ 383.106235] test_scanf: vsscanf("c9bea1b8122113e9a168df573", "%4hx%4hx%1hx%4hx%4hx%1hx%4hx%3hx", ...) expected 571539457 got 106936 ... [ 383.106398] test_scanf: failed 6 out of 2545 tests Failure output after this series: # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:94 lib/scanf_kunit.c:555: vsscanf("0 1e 3e43 31f0 0 0 5797 9c70", "%1hx %2hx %4hx %4hx %1hx %1hx %4hx %4hx", ...) expected 837828163 got 1044578334 not ok 1 " " # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:94 lib/scanf_kunit.c:555: vsscanf("dc2:1c:0:3531:2621:5172:1:7", "%3hx:%2hx:%1hx:%4hx:%4hx:%4hx:%1hx:%1hx", ...) expected 892403712 got 28 not ok 2 ":" # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:94 lib/scanf_kunit.c:555: vsscanf("e083,8f6e,b,70ca,1,1,aab1,10e4", "%4hx,%4hx,%1hx,%4hx,%1hx,%1hx,%4hx,%4hx", ...) expected 1892286475 got 757614 not ok 3 "," # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:94 lib/scanf_kunit.c:555: vsscanf("2e72-8435-1-2fc-7cbd-c2f1-7158-2b41", "%4hx-%4hx-%1hx-%3hx-%4hx-%4hx-%4hx-%4hx", ...) expected 50069505 got 99381 not ok 4 "-" # numbers_list_field_width_val_width: ASSERTION FAILED at lib/scanf_kunit.c:94 lib/scanf_kunit.c:555: vsscanf("403/0/17/1/11e7/1/1fe8/34ba", "%3hx/%1hx/%2hx/%1hx/%4hx/%1hx/%4hx/%4hx", ...) expected 65559 got 1507328 not ok 5 "/" Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v8: - Expand "scanf: remove redundant debug logs" commit message. (Andy Shevchenko) - Add patch "implicate test line in failure messages". - Rebase on linux-next, move scanf_kunit.c into lib/tests/. - Link to v7: https://lore.kernel.org/r/20250211-scanf-kunit-convert-v7-0-c057f0a3d9d8@gm… Changes in v7: - Remove redundant debug logs. (Petr Mladek) - Drop Petr's Acked-by. - Use original test assertions as KUNIT_*_EQ_MSG produces hard-to-parse messages. The new failure output is: - Link to v6: https://lore.kernel.org/r/20250210-scanf-kunit-convert-v6-0-4d583d07f92d@gm… Changes in v6: - s/at boot/at runtime/ for consistency with the printf series. - Go back to kmalloc. (Geert Uytterhoeven) - Link to v5: https://lore.kernel.org/r/20250210-scanf-kunit-convert-v5-0-8e64f3a7de99@gm… Changes in v5: - Remove extraneous trailing newlines from failure messages. - Replace `pr_debug` with `kunit_printk`. - Use static char arrays instead of kmalloc. - Drop KUnit boilerplate from CONFIG_SCANF_KUNIT_TEST help text. - Drop arch changes. - Link to v4: https://lore.kernel.org/r/20250207-scanf-kunit-convert-v4-0-a23e2afaede8@gm… Changes in v4: - Bake `test` into various macros, greatly reducing diff noise. - Revert control flow changes. - Link to v3: https://lore.kernel.org/r/20250204-scanf-kunit-convert-v3-0-386d7c3ee714@gm… Changes in v3: - Reduce diff noise in lib/Makefile. (Petr Mladek) - Split `scanf_test` into a few test cases. New output: : =================== scanf (10 subtests) ==================== : [PASSED] numbers_simple : ====================== numbers_list ======================= : [PASSED] delim=" " : [PASSED] delim=":" : [PASSED] delim="," : [PASSED] delim="-" : [PASSED] delim="/" : ================== [PASSED] numbers_list =================== : ============ numbers_list_field_width_typemax ============= : [PASSED] delim=" " : [PASSED] delim=":" : [PASSED] delim="," : [PASSED] delim="-" : [PASSED] delim="/" : ======== [PASSED] numbers_list_field_width_typemax ========= : =========== numbers_list_field_width_val_width ============ : [PASSED] delim=" " : [PASSED] delim=":" : [PASSED] delim="," : [PASSED] delim="-" : [PASSED] delim="/" : ======= [PASSED] numbers_list_field_width_val_width ======== : [PASSED] numbers_slice : [PASSED] numbers_prefix_overflow : [PASSED] test_simple_strtoull : [PASSED] test_simple_strtoll : [PASSED] test_simple_strtoul : [PASSED] test_simple_strtol : ====================== [PASSED] scanf ====================== : ============================================================ : Testing complete. Ran 22 tests: passed: 22 : Elapsed time: 5.517s total, 0.001s configuring, 5.440s building, 0.067s running - Link to v2: https://lore.kernel.org/r/20250203-scanf-kunit-convert-v2-1-277a618d804e@gm… Changes in v2: - Rename lib/{test_scanf.c => scanf_kunit.c}. (Andy Shevchenko) - Link to v1: https://lore.kernel.org/r/20250131-scanf-kunit-convert-v1-1-0976524f0eba@gm… --- Tamir Duberstein (4): scanf: implicate test line in failure messages scanf: remove redundant debug logs scanf: convert self-test to KUnit scanf: break kunit into test cases MAINTAINERS | 2 +- lib/Kconfig.debug | 12 +- lib/Makefile | 1 - lib/tests/Makefile | 1 + lib/{test_scanf.c => tests/scanf_kunit.c} | 299 +++++++++++++++--------------- tools/testing/selftests/lib/Makefile | 2 +- tools/testing/selftests/lib/config | 1 - tools/testing/selftests/lib/scanf.sh | 4 - 8 files changed, 160 insertions(+), 162 deletions(-) --- base-commit: 7b7a883c7f4de1ee5040bd1c32aabaafde54d209 change-id: 20250131-scanf-kunit-convert-f70dc33bb34c Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

6 months, 1 week

4
19
0 0

[PATCH net-next v7 0/6] tun: Introduce virtio-net hashing feature

by Akihiko Odaki

virtio-net have two usage of hashes: one is RSS and another is hash reporting. Conventionally the hash calculation was done by the VMM. However, computing the hash after the queue was chosen defeats the purpose of RSS. Another approach is to use eBPF steering program. This approach has another downside: it cannot report the calculated hash due to the restrictive nature of eBPF. Introduce the code to compute hashes to the kernel in order to overcome thse challenges. An alternative solution is to extend the eBPF steering program so that it will be able to report to the userspace, but it is based on context rewrites, which is in feature freeze. We can adopt kfuncs, but they will not be UAPIs. We opt to ioctl to align with other relevant UAPIs (KVM and vhost_net). The patches for QEMU to use this new feature was submitted as RFC and is available at: https://patchew.org/QEMU/20240915-hash-v3-0-79cb08d28647@daynix.com/ This work was presented at LPC 2024: https://lpc.events/event/18/contributions/1963/ V1 -> V2: Changed to introduce a new BPF program type. Signed-off-by: Akihiko Odaki <akihiko.odaki(a)daynix.com> --- Changes in v7: - Ensured to set hash_report to VIRTIO_NET_HASH_REPORT_NONE for VHOST_NET_F_VIRTIO_NET_HDR. - s/4/sizeof(u32)/ in patch "virtio_net: Add functions for hashing". - Added tap_skb_cb type. - Rebased. - Link to v6: https://lore.kernel.org/r/20250109-rss-v6-0-b1c90ad708f6@daynix.com Changes in v6: - Extracted changes to fill vnet header holes into another series. - Squashed patches "skbuff: Introduce SKB_EXT_TUN_VNET_HASH", "tun: Introduce virtio-net hash reporting feature", and "tun: Introduce virtio-net RSS" into patch "tun: Introduce virtio-net hash feature". - Dropped the RFC tag. - Link to v5: https://lore.kernel.org/r/20241008-rss-v5-0-f3cf68df005d@daynix.com Changes in v5: - Fixed a compilation error with CONFIG_TUN_VNET_CROSS_LE. - Optimized the calculation of the hash value according to: https://git.dpdk.org/dpdk/commit/?id=3fb1ea032bd6ff8317af5dac9af901f1f324ca… - Added patch "tun: Unify vnet implementation". - Dropped patch "tap: Pad virtio header with zero". - Added patch "selftest: tun: Test vnet ioctls without device". - Reworked selftests to skip for older kernels. - Documented the case when the underlying device is deleted and packets have queue_mapping set by TC. - Reordered test harness arguments. - Added code to handle fragmented packets. - Link to v4: https://lore.kernel.org/r/20240924-rss-v4-0-84e932ec0e6c@daynix.com Changes in v4: - Moved tun_vnet_hash_ext to if_tun.h. - Renamed virtio_net_toeplitz() to virtio_net_toeplitz_calc(). - Replaced htons() with cpu_to_be16(). - Changed virtio_net_hash_rss() to return void. - Reordered variable declarations in virtio_net_hash_rss(). - Removed virtio_net_hdr_v1_hash_from_skb(). - Updated messages of "tap: Pad virtio header with zero" and "tun: Pad virtio header with zero". - Fixed vnet_hash allocation size. - Ensured to free vnet_hash when destructing tun_struct. - Link to v3: https://lore.kernel.org/r/20240915-rss-v3-0-c630015db082@daynix.com Changes in v3: - Reverted back to add ioctl. - Split patch "tun: Introduce virtio-net hashing feature" into "tun: Introduce virtio-net hash reporting feature" and "tun: Introduce virtio-net RSS". - Changed to reuse hash values computed for automq instead of performing RSS hashing when hash reporting is requested but RSS is not. - Extracted relevant data from struct tun_struct to keep it minimal. - Added kernel-doc. - Changed to allow calling TUNGETVNETHASHCAP before TUNSETIFF. - Initialized num_buffers with 1. - Added a test case for unclassified packets. - Fixed error handling in tests. - Changed tests to verify that the queue index will not overflow. - Rebased. - Link to v2: https://lore.kernel.org/r/20231015141644.260646-1-akihiko.odaki@daynix.com --- Akihiko Odaki (6): virtio_net: Add functions for hashing net: flow_dissector: Export flow_keys_dissector_symmetric tun: Introduce virtio-net hash feature selftest: tun: Test vnet ioctls without device selftest: tun: Add tests for virtio-net hashing vhost/net: Support VIRTIO_NET_F_HASH_REPORT Documentation/networking/tuntap.rst | 7 + drivers/net/Kconfig | 1 + drivers/net/tap.c | 62 +++- drivers/net/tun.c | 89 ++++- drivers/net/tun_vnet.h | 180 +++++++++- drivers/vhost/net.c | 49 +-- include/linux/if_tap.h | 2 + include/linux/skbuff.h | 3 + include/linux/virtio_net.h | 188 +++++++++++ include/net/flow_dissector.h | 1 + include/uapi/linux/if_tun.h | 75 +++++ net/core/flow_dissector.c | 3 +- net/core/skbuff.c | 4 + tools/testing/selftests/net/Makefile | 2 +- tools/testing/selftests/net/tun.c | 627 ++++++++++++++++++++++++++++++++++- 15 files changed, 1231 insertions(+), 62 deletions(-) --- base-commit: dd83757f6e686a2188997cb58b5975f744bb7786 change-id: 20240403-rss-e737d89efa77 prerequisite-change-id: 20241230-tun-66e10a49b0c7:v6 prerequisite-patch-id: 871dc5f146fb6b0e3ec8612971a8e8190472c0fb prerequisite-patch-id: 2797ed249d32590321f088373d4055ff3f430a0e prerequisite-patch-id: ea3370c72d4904e2f0536ec76ba5d26784c0cede prerequisite-patch-id: 837e4cf5d6b451424f9b1639455e83a260c4440d prerequisite-patch-id: ea701076f57819e844f5a35efe5cbc5712d3080d prerequisite-patch-id: 701646fb43ad04cc64dd2bf13c150ccbe6f828ce prerequisite-patch-id: 53176dae0c003f5b6c114d43f936cf7140d31bb5 prerequisite-change-id: 20250116-buffers-96e14bf023fc:v2 prerequisite-patch-id: 25fd4f99d4236a05a5ef16ab79f3e85ee57e21cc Best regards, -- Akihiko Odaki <akihiko.odaki(a)daynix.com>

6 months, 1 week

4
12
0 0

Re: [brauner-github:vfs.all 205/231] WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x0 (section: .data) -> initramfs_test_extract (section: .init.text)

by David Disseldorp

[cc'ing linux-kselftest and kunit-dev] Hi, On Wed, 5 Mar 2025 01:47:55 +0800, kernel test robot wrote: > tree: https://github.com/brauner/linux.git vfs.all > head: ea47e99a3a234837d5fea0d1a20bb2ad1eaa6dd4 > commit: b6736cfccb582b7c016cba6cd484fbcf30d499af [205/231] initramfs_test: kunit tests for initramfs unpacking > config: x86_64-buildonly-randconfig-002-20250304 (https://download.01.org/0day-ci/archive/20250305/202503050109.t5Ab93hX-lkp@…) > compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250305/202503050109.t5Ab93hX-lkp@…) > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot <lkp(a)intel.com> > | Closes: https://lore.kernel.org/oe-kbuild-all/202503050109.t5Ab93hX-lkp@intel.com/ > > All warnings (new ones prefixed by >>, old ones prefixed by <<): > > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x0 (section: .data) -> initramfs_test_extract (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x30 (section: .data) -> initramfs_test_fname_overrun (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x60 (section: .data) -> initramfs_test_data (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x90 (section: .data) -> initramfs_test_csum (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0xc0 (section: .data) -> initramfs_test_hardlink (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0xf0 (section: .data) -> initramfs_test_many (section: .init.text) These new warnings are covered in the commit message. The kunit_test_init_section_suites() registered tests aren't in the .init section as debugfs entries are retained for results reporting (without an ability to rerun them). IIUC, the __kunit_init_test_suites->CONCATENATE(..., _probe) suffix is intended to suppress the modpost warning - @kunit-dev: any ideas why this isn't working as intended? Thanks, David

6 months, 1 week

3
3
0 0

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