// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2023 Isovalent */ #include #include #include #include #define loopback 1 #define ping_cmd "ping -q -c1 -w1 127.0.0.1 > /dev/null" #include "test_tc_link.skel.h" #include "tc_helpers.h" void serial_test_tc_links_basic(void) { LIBBPF_OPTS(bpf_prog_query_opts, optq); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 prog_ids[2], link_ids[2]; __u32 pid1, pid2, lid1, lid2; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open_and_load(); if (!ASSERT_OK_PTR(skel, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); assert_mprog_count(BPF_TCX_INGRESS, 0); assert_mprog_count(BPF_TCX_EGRESS, 0); ASSERT_EQ(skel->bss->seen_tc1, false, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2"); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; lid1 = id_from_link_fd(bpf_link__fd(skel->links.tc1)); assert_mprog_count(BPF_TCX_INGRESS, 1); assert_mprog_count(BPF_TCX_EGRESS, 0); optq.prog_ids = prog_ids; optq.link_ids = link_ids; memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, BPF_TCX_INGRESS, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 1, "count"); ASSERT_EQ(optq.revision, 2, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], 0, "link_ids[1]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2"); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; lid2 = id_from_link_fd(bpf_link__fd(skel->links.tc2)); ASSERT_NEQ(lid1, lid2, "link_ids_1_2"); assert_mprog_count(BPF_TCX_INGRESS, 1); assert_mprog_count(BPF_TCX_EGRESS, 1); memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, BPF_TCX_EGRESS, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 1, "count"); ASSERT_EQ(optq.revision, 2, "revision"); ASSERT_EQ(optq.prog_ids[0], pid2, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid2, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], 0, "link_ids[1]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); cleanup: test_tc_link__destroy(skel); assert_mprog_count(BPF_TCX_INGRESS, 0); assert_mprog_count(BPF_TCX_EGRESS, 0); } static void test_tc_links_before_target(int target) { LIBBPF_OPTS(bpf_prog_query_opts, optq); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 prog_ids[5], link_ids[5]; __u32 pid1, pid2, pid3, pid4; __u32 lid1, lid2, lid3, lid4; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc3, target), 0, "tc3_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc4, target), 0, "tc4_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); pid4 = id_from_prog_fd(bpf_program__fd(skel->progs.tc4)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid3, pid4, "prog_ids_3_4"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; lid1 = id_from_link_fd(bpf_link__fd(skel->links.tc1)); assert_mprog_count(target, 1); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; lid2 = id_from_link_fd(bpf_link__fd(skel->links.tc2)); assert_mprog_count(target, 2); optq.prog_ids = prog_ids; optq.link_ids = link_ids; memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 2, "count"); ASSERT_EQ(optq.revision, 3, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid2, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid2, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], 0, "link_ids[2]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3"); ASSERT_EQ(skel->bss->seen_tc4, false, "seen_tc4"); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE, .relative_fd = bpf_program__fd(skel->progs.tc2), ); link = bpf_program__attach_tcx(skel->progs.tc3, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc3 = link; lid3 = id_from_link_fd(bpf_link__fd(skel->links.tc3)); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE | BPF_F_LINK, .relative_id = lid1, ); link = bpf_program__attach_tcx(skel->progs.tc4, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc4 = link; lid4 = id_from_link_fd(bpf_link__fd(skel->links.tc4)); assert_mprog_count(target, 4); memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 4, "count"); ASSERT_EQ(optq.revision, 5, "revision"); ASSERT_EQ(optq.prog_ids[0], pid4, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid4, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid1, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid1, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], pid3, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], lid3, "link_ids[2]"); ASSERT_EQ(optq.prog_ids[3], pid2, "prog_ids[3]"); ASSERT_EQ(optq.link_ids[3], lid2, "link_ids[3]"); ASSERT_EQ(optq.prog_ids[4], 0, "prog_ids[4]"); ASSERT_EQ(optq.link_ids[4], 0, "link_ids[4]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3"); ASSERT_EQ(skel->bss->seen_tc4, true, "seen_tc4"); cleanup: test_tc_link__destroy(skel); assert_mprog_count(target, 0); } void serial_test_tc_links_before(void) { test_tc_links_before_target(BPF_TCX_INGRESS); test_tc_links_before_target(BPF_TCX_EGRESS); } static void test_tc_links_after_target(int target) { LIBBPF_OPTS(bpf_prog_query_opts, optq); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 prog_ids[5], link_ids[5]; __u32 pid1, pid2, pid3, pid4; __u32 lid1, lid2, lid3, lid4; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc3, target), 0, "tc3_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc4, target), 0, "tc4_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); pid4 = id_from_prog_fd(bpf_program__fd(skel->progs.tc4)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid3, pid4, "prog_ids_3_4"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; lid1 = id_from_link_fd(bpf_link__fd(skel->links.tc1)); assert_mprog_count(target, 1); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; lid2 = id_from_link_fd(bpf_link__fd(skel->links.tc2)); assert_mprog_count(target, 2); optq.prog_ids = prog_ids; optq.link_ids = link_ids; memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 2, "count"); ASSERT_EQ(optq.revision, 3, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid2, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid2, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], 0, "link_ids[2]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3"); ASSERT_EQ(skel->bss->seen_tc4, false, "seen_tc4"); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER, .relative_fd = bpf_program__fd(skel->progs.tc1), ); link = bpf_program__attach_tcx(skel->progs.tc3, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc3 = link; lid3 = id_from_link_fd(bpf_link__fd(skel->links.tc3)); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER | BPF_F_LINK, .relative_fd = bpf_link__fd(skel->links.tc2), ); link = bpf_program__attach_tcx(skel->progs.tc4, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc4 = link; lid4 = id_from_link_fd(bpf_link__fd(skel->links.tc4)); assert_mprog_count(target, 4); memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 4, "count"); ASSERT_EQ(optq.revision, 5, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid3, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid3, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], pid2, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], lid2, "link_ids[2]"); ASSERT_EQ(optq.prog_ids[3], pid4, "prog_ids[3]"); ASSERT_EQ(optq.link_ids[3], lid4, "link_ids[3]"); ASSERT_EQ(optq.prog_ids[4], 0, "prog_ids[4]"); ASSERT_EQ(optq.link_ids[4], 0, "link_ids[4]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3"); ASSERT_EQ(skel->bss->seen_tc4, true, "seen_tc4"); cleanup: test_tc_link__destroy(skel); assert_mprog_count(target, 0); } void serial_test_tc_links_after(void) { test_tc_links_after_target(BPF_TCX_INGRESS); test_tc_links_after_target(BPF_TCX_EGRESS); } static void test_tc_links_revision_target(int target) { LIBBPF_OPTS(bpf_prog_query_opts, optq); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 prog_ids[3], link_ids[3]; __u32 pid1, pid2, lid1, lid2; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); assert_mprog_count(target, 0); optl.expected_revision = 1; link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; lid1 = id_from_link_fd(bpf_link__fd(skel->links.tc1)); assert_mprog_count(target, 1); optl.expected_revision = 1; link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 1); optl.expected_revision = 2; link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; lid2 = id_from_link_fd(bpf_link__fd(skel->links.tc2)); assert_mprog_count(target, 2); optq.prog_ids = prog_ids; optq.link_ids = link_ids; memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 2, "count"); ASSERT_EQ(optq.revision, 3, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid2, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid2, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], 0, "prog_ids[2]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); cleanup: test_tc_link__destroy(skel); assert_mprog_count(target, 0); } void serial_test_tc_links_revision(void) { test_tc_links_revision_target(BPF_TCX_INGRESS); test_tc_links_revision_target(BPF_TCX_EGRESS); } static void test_tc_chain_classic(int target, bool chain_tc_old) { LIBBPF_OPTS(bpf_tc_opts, tc_opts, .handle = 1, .priority = 1); LIBBPF_OPTS(bpf_tc_hook, tc_hook, .ifindex = loopback); bool hook_created = false, tc_attached = false; LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 pid1, pid2, pid3; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); if (chain_tc_old) { tc_hook.attach_point = target == BPF_TCX_INGRESS ? BPF_TC_INGRESS : BPF_TC_EGRESS; err = bpf_tc_hook_create(&tc_hook); if (err == 0) hook_created = true; err = err == -EEXIST ? 0 : err; if (!ASSERT_OK(err, "bpf_tc_hook_create")) goto cleanup; tc_opts.prog_fd = bpf_program__fd(skel->progs.tc3); err = bpf_tc_attach(&tc_hook, &tc_opts); if (!ASSERT_OK(err, "bpf_tc_attach")) goto cleanup; tc_attached = true; } link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; assert_mprog_count(target, 2); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, chain_tc_old, "seen_tc3"); err = bpf_link__detach(skel->links.tc2); if (!ASSERT_OK(err, "prog_detach")) goto cleanup; assert_mprog_count(target, 1); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, chain_tc_old, "seen_tc3"); cleanup: if (tc_attached) { tc_opts.flags = tc_opts.prog_fd = tc_opts.prog_id = 0; err = bpf_tc_detach(&tc_hook, &tc_opts); ASSERT_OK(err, "bpf_tc_detach"); } if (hook_created) { tc_hook.attach_point = BPF_TC_INGRESS | BPF_TC_EGRESS; bpf_tc_hook_destroy(&tc_hook); } assert_mprog_count(target, 1); test_tc_link__destroy(skel); assert_mprog_count(target, 0); } void serial_test_tc_links_chain_classic(void) { test_tc_chain_classic(BPF_TCX_INGRESS, false); test_tc_chain_classic(BPF_TCX_EGRESS, false); test_tc_chain_classic(BPF_TCX_INGRESS, true); test_tc_chain_classic(BPF_TCX_EGRESS, true); } static void test_tc_links_replace_target(int target) { LIBBPF_OPTS(bpf_prog_query_opts, optq); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 pid1, pid2, pid3, lid1, lid2; __u32 prog_ids[4], link_ids[4]; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc3, target), 0, "tc3_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); optl.expected_revision = 1; link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; lid1 = id_from_link_fd(bpf_link__fd(skel->links.tc1)); assert_mprog_count(target, 1); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE, .relative_id = pid1, .expected_revision = 2, ); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; lid2 = id_from_link_fd(bpf_link__fd(skel->links.tc2)); assert_mprog_count(target, 2); optq.prog_ids = prog_ids; optq.link_ids = link_ids; memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 2, "count"); ASSERT_EQ(optq.revision, 3, "revision"); ASSERT_EQ(optq.prog_ids[0], pid2, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid2, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid1, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid1, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], 0, "link_ids[2]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3"); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_REPLACE, .relative_fd = bpf_program__fd(skel->progs.tc2), .expected_revision = 3, ); link = bpf_program__attach_tcx(skel->progs.tc3, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 2); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_REPLACE | BPF_F_LINK, .relative_fd = bpf_link__fd(skel->links.tc2), .expected_revision = 3, ); link = bpf_program__attach_tcx(skel->progs.tc3, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 2); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_REPLACE | BPF_F_LINK | BPF_F_AFTER, .relative_id = lid2, ); link = bpf_program__attach_tcx(skel->progs.tc3, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 2); err = bpf_link__update_program(skel->links.tc2, skel->progs.tc3); if (!ASSERT_OK(err, "link_update")) goto cleanup; assert_mprog_count(target, 2); memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 2, "count"); ASSERT_EQ(optq.revision, 4, "revision"); ASSERT_EQ(optq.prog_ids[0], pid3, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid2, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid1, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid1, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], 0, "link_ids[2]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3"); err = bpf_link__detach(skel->links.tc2); if (!ASSERT_OK(err, "link_detach")) goto cleanup; assert_mprog_count(target, 1); memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 1, "count"); ASSERT_EQ(optq.revision, 5, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], 0, "link_ids[1]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3"); err = bpf_link__update_program(skel->links.tc1, skel->progs.tc1); if (!ASSERT_OK(err, "link_update_self")) goto cleanup; assert_mprog_count(target, 1); memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 1, "count"); ASSERT_EQ(optq.revision, 5, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], 0, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], 0, "link_ids[1]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3"); cleanup: test_tc_link__destroy(skel); assert_mprog_count(target, 0); } void serial_test_tc_links_replace(void) { test_tc_links_replace_target(BPF_TCX_INGRESS); test_tc_links_replace_target(BPF_TCX_EGRESS); } static void test_tc_links_invalid_target(int target) { LIBBPF_OPTS(bpf_prog_query_opts, optq); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 pid1, pid2, lid1; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); assert_mprog_count(target, 0); optl.flags = BPF_F_BEFORE | BPF_F_AFTER; link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE | BPF_F_ID, ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER | BPF_F_ID, ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_ID, ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_LINK, .relative_fd = bpf_program__fd(skel->progs.tc2), ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_LINK, ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .relative_fd = bpf_program__fd(skel->progs.tc2), ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE | BPF_F_AFTER, .relative_fd = bpf_program__fd(skel->progs.tc2), ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE, .relative_fd = bpf_program__fd(skel->progs.tc1), ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_ID, .relative_id = pid2, ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_ID, .relative_id = 42, ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE, .relative_fd = bpf_program__fd(skel->progs.tc1), ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE | BPF_F_LINK, .relative_fd = bpf_program__fd(skel->progs.tc1), ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER, .relative_fd = bpf_program__fd(skel->progs.tc1), ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl); link = bpf_program__attach_tcx(skel->progs.tc1, 0, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER | BPF_F_LINK, .relative_fd = bpf_program__fd(skel->progs.tc1), ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 0); LIBBPF_OPTS_RESET(optl); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; lid1 = id_from_link_fd(bpf_link__fd(skel->links.tc1)); assert_mprog_count(target, 1); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER | BPF_F_LINK, .relative_fd = bpf_program__fd(skel->progs.tc1), ); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 1); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE | BPF_F_LINK | BPF_F_ID, .relative_id = ~0, ); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 1); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE | BPF_F_LINK | BPF_F_ID, .relative_id = lid1, ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 1); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE | BPF_F_ID, .relative_id = pid1, ); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_ERR_PTR(link, "link_attach_should_fail")) { bpf_link__destroy(link); goto cleanup; } assert_mprog_count(target, 1); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE | BPF_F_LINK | BPF_F_ID, .relative_id = lid1, ); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; assert_mprog_count(target, 2); cleanup: test_tc_link__destroy(skel); assert_mprog_count(target, 0); } void serial_test_tc_links_invalid(void) { test_tc_links_invalid_target(BPF_TCX_INGRESS); test_tc_links_invalid_target(BPF_TCX_EGRESS); } static void test_tc_links_prepend_target(int target) { LIBBPF_OPTS(bpf_prog_query_opts, optq); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 prog_ids[5], link_ids[5]; __u32 pid1, pid2, pid3, pid4; __u32 lid1, lid2, lid3, lid4; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc3, target), 0, "tc3_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc4, target), 0, "tc4_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); pid4 = id_from_prog_fd(bpf_program__fd(skel->progs.tc4)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid3, pid4, "prog_ids_3_4"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; lid1 = id_from_link_fd(bpf_link__fd(skel->links.tc1)); assert_mprog_count(target, 1); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE, ); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; lid2 = id_from_link_fd(bpf_link__fd(skel->links.tc2)); assert_mprog_count(target, 2); optq.prog_ids = prog_ids; optq.link_ids = link_ids; memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 2, "count"); ASSERT_EQ(optq.revision, 3, "revision"); ASSERT_EQ(optq.prog_ids[0], pid2, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid2, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid1, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid1, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], 0, "link_ids[2]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3"); ASSERT_EQ(skel->bss->seen_tc4, false, "seen_tc4"); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE, ); link = bpf_program__attach_tcx(skel->progs.tc3, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc3 = link; lid3 = id_from_link_fd(bpf_link__fd(skel->links.tc3)); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_BEFORE, ); link = bpf_program__attach_tcx(skel->progs.tc4, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc4 = link; lid4 = id_from_link_fd(bpf_link__fd(skel->links.tc4)); assert_mprog_count(target, 4); memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 4, "count"); ASSERT_EQ(optq.revision, 5, "revision"); ASSERT_EQ(optq.prog_ids[0], pid4, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid4, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid3, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid3, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], pid2, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], lid2, "link_ids[2]"); ASSERT_EQ(optq.prog_ids[3], pid1, "prog_ids[3]"); ASSERT_EQ(optq.link_ids[3], lid1, "link_ids[3]"); ASSERT_EQ(optq.prog_ids[4], 0, "prog_ids[4]"); ASSERT_EQ(optq.link_ids[4], 0, "link_ids[4]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3"); ASSERT_EQ(skel->bss->seen_tc4, true, "seen_tc4"); cleanup: test_tc_link__destroy(skel); assert_mprog_count(target, 0); } void serial_test_tc_links_prepend(void) { test_tc_links_prepend_target(BPF_TCX_INGRESS); test_tc_links_prepend_target(BPF_TCX_EGRESS); } static void test_tc_links_append_target(int target) { LIBBPF_OPTS(bpf_prog_query_opts, optq); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 prog_ids[5], link_ids[5]; __u32 pid1, pid2, pid3, pid4; __u32 lid1, lid2, lid3, lid4; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc3, target), 0, "tc3_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc4, target), 0, "tc4_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); pid4 = id_from_prog_fd(bpf_program__fd(skel->progs.tc4)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid3, pid4, "prog_ids_3_4"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; lid1 = id_from_link_fd(bpf_link__fd(skel->links.tc1)); assert_mprog_count(target, 1); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER, ); link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; lid2 = id_from_link_fd(bpf_link__fd(skel->links.tc2)); assert_mprog_count(target, 2); optq.prog_ids = prog_ids; optq.link_ids = link_ids; memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 2, "count"); ASSERT_EQ(optq.revision, 3, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid2, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid2, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], 0, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], 0, "link_ids[2]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, false, "seen_tc3"); ASSERT_EQ(skel->bss->seen_tc4, false, "seen_tc4"); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER, ); link = bpf_program__attach_tcx(skel->progs.tc3, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc3 = link; lid3 = id_from_link_fd(bpf_link__fd(skel->links.tc3)); LIBBPF_OPTS_RESET(optl, .flags = BPF_F_AFTER, ); link = bpf_program__attach_tcx(skel->progs.tc4, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc4 = link; lid4 = id_from_link_fd(bpf_link__fd(skel->links.tc4)); assert_mprog_count(target, 4); memset(prog_ids, 0, sizeof(prog_ids)); memset(link_ids, 0, sizeof(link_ids)); optq.count = ARRAY_SIZE(prog_ids); err = bpf_prog_query_opts(loopback, target, &optq); if (!ASSERT_OK(err, "prog_query")) goto cleanup; ASSERT_EQ(optq.count, 4, "count"); ASSERT_EQ(optq.revision, 5, "revision"); ASSERT_EQ(optq.prog_ids[0], pid1, "prog_ids[0]"); ASSERT_EQ(optq.link_ids[0], lid1, "link_ids[0]"); ASSERT_EQ(optq.prog_ids[1], pid2, "prog_ids[1]"); ASSERT_EQ(optq.link_ids[1], lid2, "link_ids[1]"); ASSERT_EQ(optq.prog_ids[2], pid3, "prog_ids[2]"); ASSERT_EQ(optq.link_ids[2], lid3, "link_ids[2]"); ASSERT_EQ(optq.prog_ids[3], pid4, "prog_ids[3]"); ASSERT_EQ(optq.link_ids[3], lid4, "link_ids[3]"); ASSERT_EQ(optq.prog_ids[4], 0, "prog_ids[4]"); ASSERT_EQ(optq.link_ids[4], 0, "link_ids[4]"); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, true, "seen_tc3"); ASSERT_EQ(skel->bss->seen_tc4, true, "seen_tc4"); cleanup: test_tc_link__destroy(skel); assert_mprog_count(target, 0); } void serial_test_tc_links_append(void) { test_tc_links_append_target(BPF_TCX_INGRESS); test_tc_links_append_target(BPF_TCX_EGRESS); } static void test_tc_links_dev_cleanup_target(int target) { LIBBPF_OPTS(bpf_tcx_opts, optl); LIBBPF_OPTS(bpf_prog_query_opts, optq); __u32 pid1, pid2, pid3, pid4; struct test_tc_link *skel; struct bpf_link *link; int err, ifindex; ASSERT_OK(system("ip link add dev tcx_opts1 type veth peer name tcx_opts2"), "add veth"); ifindex = if_nametoindex("tcx_opts1"); ASSERT_NEQ(ifindex, 0, "non_zero_ifindex"); skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc3, target), 0, "tc3_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc4, target), 0, "tc4_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); pid4 = id_from_prog_fd(bpf_program__fd(skel->progs.tc4)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid3, pid4, "prog_ids_3_4"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); link = bpf_program__attach_tcx(skel->progs.tc1, ifindex, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; assert_mprog_count_ifindex(ifindex, target, 1); link = bpf_program__attach_tcx(skel->progs.tc2, ifindex, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; assert_mprog_count_ifindex(ifindex, target, 2); link = bpf_program__attach_tcx(skel->progs.tc3, ifindex, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc3 = link; assert_mprog_count_ifindex(ifindex, target, 3); link = bpf_program__attach_tcx(skel->progs.tc4, ifindex, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc4 = link; assert_mprog_count_ifindex(ifindex, target, 4); ASSERT_OK(system("ip link del dev tcx_opts1"), "del veth"); ASSERT_EQ(if_nametoindex("tcx_opts1"), 0, "dev1_removed"); ASSERT_EQ(if_nametoindex("tcx_opts2"), 0, "dev2_removed"); ASSERT_EQ(ifindex_from_link_fd(bpf_link__fd(skel->links.tc1)), 0, "tc1_ifindex"); ASSERT_EQ(ifindex_from_link_fd(bpf_link__fd(skel->links.tc2)), 0, "tc2_ifindex"); ASSERT_EQ(ifindex_from_link_fd(bpf_link__fd(skel->links.tc3)), 0, "tc3_ifindex"); ASSERT_EQ(ifindex_from_link_fd(bpf_link__fd(skel->links.tc4)), 0, "tc4_ifindex"); test_tc_link__destroy(skel); return; cleanup: test_tc_link__destroy(skel); ASSERT_OK(system("ip link del dev tcx_opts1"), "del veth"); ASSERT_EQ(if_nametoindex("tcx_opts1"), 0, "dev1_removed"); ASSERT_EQ(if_nametoindex("tcx_opts2"), 0, "dev2_removed"); } void serial_test_tc_links_dev_cleanup(void) { test_tc_links_dev_cleanup_target(BPF_TCX_INGRESS); test_tc_links_dev_cleanup_target(BPF_TCX_EGRESS); } static void test_tc_chain_mixed(int target) { LIBBPF_OPTS(bpf_tc_opts, tc_opts, .handle = 1, .priority = 1); LIBBPF_OPTS(bpf_tc_hook, tc_hook, .ifindex = loopback); LIBBPF_OPTS(bpf_tcx_opts, optl); struct test_tc_link *skel; struct bpf_link *link; __u32 pid1, pid2, pid3; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc4, target), 0, "tc4_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc5, target), 0, "tc5_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc6, target), 0, "tc6_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc4)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc5)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc6)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); tc_hook.attach_point = target == BPF_TCX_INGRESS ? BPF_TC_INGRESS : BPF_TC_EGRESS; err = bpf_tc_hook_create(&tc_hook); err = err == -EEXIST ? 0 : err; if (!ASSERT_OK(err, "bpf_tc_hook_create")) goto cleanup; tc_opts.prog_fd = bpf_program__fd(skel->progs.tc5); err = bpf_tc_attach(&tc_hook, &tc_opts); if (!ASSERT_OK(err, "bpf_tc_attach")) goto cleanup; link = bpf_program__attach_tcx(skel->progs.tc6, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc6 = link; assert_mprog_count(target, 1); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc4, false, "seen_tc4"); ASSERT_EQ(skel->bss->seen_tc5, false, "seen_tc5"); ASSERT_EQ(skel->bss->seen_tc6, true, "seen_tc6"); err = bpf_link__update_program(skel->links.tc6, skel->progs.tc4); if (!ASSERT_OK(err, "link_update")) goto cleanup; assert_mprog_count(target, 1); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc4, true, "seen_tc4"); ASSERT_EQ(skel->bss->seen_tc5, true, "seen_tc5"); ASSERT_EQ(skel->bss->seen_tc6, false, "seen_tc6"); err = bpf_link__detach(skel->links.tc6); if (!ASSERT_OK(err, "prog_detach")) goto cleanup; assert_mprog_count(target, 0); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc4, false, "seen_tc4"); ASSERT_EQ(skel->bss->seen_tc5, true, "seen_tc5"); ASSERT_EQ(skel->bss->seen_tc6, false, "seen_tc6"); cleanup: tc_opts.flags = tc_opts.prog_fd = tc_opts.prog_id = 0; err = bpf_tc_detach(&tc_hook, &tc_opts); ASSERT_OK(err, "bpf_tc_detach"); tc_hook.attach_point = BPF_TC_INGRESS | BPF_TC_EGRESS; bpf_tc_hook_destroy(&tc_hook); test_tc_link__destroy(skel); } void serial_test_tc_links_chain_mixed(void) { test_tc_chain_mixed(BPF_TCX_INGRESS); test_tc_chain_mixed(BPF_TCX_EGRESS); } static void test_tc_links_ingress(int target, bool chain_tc_old, bool tcx_teardown_first) { LIBBPF_OPTS(bpf_tc_opts, tc_opts, .handle = 1, .priority = 1, ); LIBBPF_OPTS(bpf_tc_hook, tc_hook, .ifindex = loopback, .attach_point = BPF_TC_CUSTOM, .parent = TC_H_INGRESS, ); bool hook_created = false, tc_attached = false; LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 pid1, pid2, pid3; struct test_tc_link *skel; struct bpf_link *link; int err; skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); if (chain_tc_old) { ASSERT_OK(system("tc qdisc add dev lo ingress"), "add_ingress"); hook_created = true; tc_opts.prog_fd = bpf_program__fd(skel->progs.tc3); err = bpf_tc_attach(&tc_hook, &tc_opts); if (!ASSERT_OK(err, "bpf_tc_attach")) goto cleanup; tc_attached = true; } link = bpf_program__attach_tcx(skel->progs.tc1, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; link = bpf_program__attach_tcx(skel->progs.tc2, loopback, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; assert_mprog_count(target, 2); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, true, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, chain_tc_old, "seen_tc3"); err = bpf_link__detach(skel->links.tc2); if (!ASSERT_OK(err, "prog_detach")) goto cleanup; assert_mprog_count(target, 1); tc_skel_reset_all_seen(skel); ASSERT_OK(system(ping_cmd), ping_cmd); ASSERT_EQ(skel->bss->seen_tc1, true, "seen_tc1"); ASSERT_EQ(skel->bss->seen_tc2, false, "seen_tc2"); ASSERT_EQ(skel->bss->seen_tc3, chain_tc_old, "seen_tc3"); cleanup: if (tc_attached) { tc_opts.flags = tc_opts.prog_fd = tc_opts.prog_id = 0; err = bpf_tc_detach(&tc_hook, &tc_opts); ASSERT_OK(err, "bpf_tc_detach"); } ASSERT_OK(system(ping_cmd), ping_cmd); assert_mprog_count(target, 1); if (hook_created && tcx_teardown_first) ASSERT_OK(system("tc qdisc del dev lo ingress"), "del_ingress"); ASSERT_OK(system(ping_cmd), ping_cmd); test_tc_link__destroy(skel); ASSERT_OK(system(ping_cmd), ping_cmd); if (hook_created && !tcx_teardown_first) ASSERT_OK(system("tc qdisc del dev lo ingress"), "del_ingress"); ASSERT_OK(system(ping_cmd), ping_cmd); assert_mprog_count(target, 0); } void serial_test_tc_links_ingress(void) { test_tc_links_ingress(BPF_TCX_INGRESS, true, true); test_tc_links_ingress(BPF_TCX_INGRESS, true, false); test_tc_links_ingress(BPF_TCX_INGRESS, false, false); } static void test_tc_links_dev_mixed(int target) { LIBBPF_OPTS(bpf_tc_opts, tc_opts, .handle = 1, .priority = 1); LIBBPF_OPTS(bpf_tc_hook, tc_hook); LIBBPF_OPTS(bpf_tcx_opts, optl); __u32 pid1, pid2, pid3, pid4; struct test_tc_link *skel; struct bpf_link *link; int err, ifindex; ASSERT_OK(system("ip link add dev tcx_opts1 type veth peer name tcx_opts2"), "add veth"); ifindex = if_nametoindex("tcx_opts1"); ASSERT_NEQ(ifindex, 0, "non_zero_ifindex"); skel = test_tc_link__open(); if (!ASSERT_OK_PTR(skel, "skel_open")) goto cleanup; ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc1, target), 0, "tc1_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc2, target), 0, "tc2_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc3, target), 0, "tc3_attach_type"); ASSERT_EQ(bpf_program__set_expected_attach_type(skel->progs.tc4, target), 0, "tc4_attach_type"); err = test_tc_link__load(skel); if (!ASSERT_OK(err, "skel_load")) goto cleanup; pid1 = id_from_prog_fd(bpf_program__fd(skel->progs.tc1)); pid2 = id_from_prog_fd(bpf_program__fd(skel->progs.tc2)); pid3 = id_from_prog_fd(bpf_program__fd(skel->progs.tc3)); pid4 = id_from_prog_fd(bpf_program__fd(skel->progs.tc4)); ASSERT_NEQ(pid1, pid2, "prog_ids_1_2"); ASSERT_NEQ(pid3, pid4, "prog_ids_3_4"); ASSERT_NEQ(pid2, pid3, "prog_ids_2_3"); assert_mprog_count(target, 0); link = bpf_program__attach_tcx(skel->progs.tc1, ifindex, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc1 = link; assert_mprog_count_ifindex(ifindex, target, 1); link = bpf_program__attach_tcx(skel->progs.tc2, ifindex, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc2 = link; assert_mprog_count_ifindex(ifindex, target, 2); link = bpf_program__attach_tcx(skel->progs.tc3, ifindex, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc3 = link; assert_mprog_count_ifindex(ifindex, target, 3); link = bpf_program__attach_tcx(skel->progs.tc4, ifindex, &optl); if (!ASSERT_OK_PTR(link, "link_attach")) goto cleanup; skel->links.tc4 = link; assert_mprog_count_ifindex(ifindex, target, 4); tc_hook.ifindex = ifindex; tc_hook.attach_point = target == BPF_TCX_INGRESS ? BPF_TC_INGRESS : BPF_TC_EGRESS; err = bpf_tc_hook_create(&tc_hook); err = err == -EEXIST ? 0 : err; if (!ASSERT_OK(err, "bpf_tc_hook_create")) goto cleanup; tc_opts.prog_fd = bpf_program__fd(skel->progs.tc5); err = bpf_tc_attach(&tc_hook, &tc_opts); if (!ASSERT_OK(err, "bpf_tc_attach")) goto cleanup; ASSERT_OK(system("ip link del dev tcx_opts1"), "del veth"); ASSERT_EQ(if_nametoindex("tcx_opts1"), 0, "dev1_removed"); ASSERT_EQ(if_nametoindex("tcx_opts2"), 0, "dev2_removed"); ASSERT_EQ(ifindex_from_link_fd(bpf_link__fd(skel->links.tc1)), 0, "tc1_ifindex"); ASSERT_EQ(ifindex_from_link_fd(bpf_link__fd(skel->links.tc2)), 0, "tc2_ifindex"); ASSERT_EQ(ifindex_from_link_fd(bpf_link__fd(skel->links.tc3)), 0, "tc3_ifindex"); ASSERT_EQ(ifindex_from_link_fd(bpf_link__fd(skel->links.tc4)), 0, "tc4_ifindex"); test_tc_link__destroy(skel); return; cleanup: test_tc_link__destroy(skel); ASSERT_OK(system("ip link del dev tcx_opts1"), "del veth"); ASSERT_EQ(if_nametoindex("tcx_opts1"), 0, "dev1_removed"); ASSERT_EQ(if_nametoindex("tcx_opts2"), 0, "dev2_removed"); } void serial_test_tc_links_dev_mixed(void) { test_tc_links_dev_mixed(BPF_TCX_INGRESS); test_tc_links_dev_mixed(BPF_TCX_EGRESS); }