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Fri, 21 Nov 2025 00:14:05 -0800 (PST) From: Hoyeon Lee To: bpf@vger.kernel.org Cc: andrii@kernel.org, eddyz87@gmail.com, ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, shuah@kernel.org, hoyeon.lee@suse.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next v2 1/2] selftests/bpf: use sockaddr_storage directly in cls_redirect test Date: Fri, 21 Nov 2025 17:13:31 +0900 Message-ID: <20251121081332.2309838-2-hoyeon.lee@suse.com> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251121081332.2309838-1-hoyeon.lee@suse.com> References: <20251121081332.2309838-1-hoyeon.lee@suse.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The cls_redirect test uses a custom addr_port/tuple wrapper to represent IPv4/IPv6 addresses and ports. This custom wrapper requires extra conversion logic and specific helpers such as fill_addr_port(), which are no longer necessary when using standard socket address structures. This commit replaces addr_port/tuple with the standard sockaddr_storage so test handles address families and ports using native socket types. It removes the custom helper, eliminates redundant casts, and simplifies the setup helpers without functional changes. set_up_conn() and build_input() now take src/dst sockaddr_storage directly. Signed-off-by: Hoyeon Lee --- Changes in v2: - Remove the tuple wrapper and pass src/dst sockaddr_storage directly. - Rely on ss_family for protocol/port selection. - No other logic changes. .../selftests/bpf/prog_tests/cls_redirect.c | 122 ++++++------------ 1 file changed, 43 insertions(+), 79 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/cls_redirect.c b/tools/= testing/selftests/bpf/prog_tests/cls_redirect.c index 34b59f6baca1..7488a7606e6a 100644 --- a/tools/testing/selftests/bpf/prog_tests/cls_redirect.c +++ b/tools/testing/selftests/bpf/prog_tests/cls_redirect.c @@ -22,79 +22,37 @@ =20 static int duration =3D 0; =20 -struct addr_port { - in_port_t port; - union { - struct in_addr in_addr; - struct in6_addr in6_addr; - }; -}; - -struct tuple { - int family; - struct addr_port src; - struct addr_port dst; -}; - -static bool fill_addr_port(const struct sockaddr *sa, struct addr_port *ap) -{ - const struct sockaddr_in6 *in6; - const struct sockaddr_in *in; - - switch (sa->sa_family) { - case AF_INET: - in =3D (const struct sockaddr_in *)sa; - ap->in_addr =3D in->sin_addr; - ap->port =3D in->sin_port; - return true; - - case AF_INET6: - in6 =3D (const struct sockaddr_in6 *)sa; - ap->in6_addr =3D in6->sin6_addr; - ap->port =3D in6->sin6_port; - return true; - - default: - return false; - } -} =20 -static bool set_up_conn(const struct sockaddr *addr, socklen_t len, int ty= pe, - int *server, int *conn, struct tuple *tuple) +static bool set_up_conn(const struct sockaddr_storage *addr, socklen_t len= , int type, + int *server, int *conn, + struct sockaddr_storage *src, + struct sockaddr_storage *dst) { struct sockaddr_storage ss; socklen_t slen =3D sizeof(ss); - struct sockaddr *sa =3D (struct sockaddr *)&ss; =20 - *server =3D start_server_addr(type, (struct sockaddr_storage *)addr, len,= NULL); + *server =3D start_server_addr(type, addr, len, NULL); if (*server < 0) return false; =20 - if (CHECK_FAIL(getsockname(*server, sa, &slen))) + if (CHECK_FAIL(getsockname(*server, (struct sockaddr *)&ss, &slen))) goto close_server; =20 - *conn =3D connect_to_addr(type, (struct sockaddr_storage *)sa, slen, NULL= ); + *conn =3D connect_to_addr(type, &ss, slen, NULL); if (*conn < 0) goto close_server; =20 /* We want to simulate packets arriving at conn, so we have to * swap src and dst. */ - slen =3D sizeof(ss); - if (CHECK_FAIL(getsockname(*conn, sa, &slen))) - goto close_conn; - - if (CHECK_FAIL(!fill_addr_port(sa, &tuple->dst))) + slen =3D sizeof(*dst); + if (CHECK_FAIL(getsockname(*conn, (struct sockaddr *)dst, &slen))) goto close_conn; =20 - slen =3D sizeof(ss); - if (CHECK_FAIL(getpeername(*conn, sa, &slen))) + slen =3D sizeof(*src); + if (CHECK_FAIL(getpeername(*conn, (struct sockaddr *)src, &slen))) goto close_conn; =20 - if (CHECK_FAIL(!fill_addr_port(sa, &tuple->src))) - goto close_conn; - - tuple->family =3D ss.ss_family; return true; =20 close_conn: @@ -110,17 +68,16 @@ static socklen_t prepare_addr(struct sockaddr_storage = *addr, int family) { struct sockaddr_in *addr4; struct sockaddr_in6 *addr6; + memset(addr, 0, sizeof(*addr)); =20 switch (family) { case AF_INET: addr4 =3D (struct sockaddr_in *)addr; - memset(addr4, 0, sizeof(*addr4)); addr4->sin_family =3D family; addr4->sin_addr.s_addr =3D htonl(INADDR_LOOPBACK); return sizeof(*addr4); case AF_INET6: addr6 =3D (struct sockaddr_in6 *)addr; - memset(addr6, 0, sizeof(*addr6)); addr6->sin6_family =3D family; addr6->sin6_addr =3D in6addr_loopback; return sizeof(*addr6); @@ -242,9 +199,15 @@ static void encap_init(encap_headers_t *encap, uint8_t= hop_count, uint8_t proto) } =20 static size_t build_input(const struct test_cfg *test, void *const buf, - const struct tuple *tuple) + const struct sockaddr_storage *src, + const struct sockaddr_storage *dst) { - in_port_t sport =3D tuple->src.port; + struct sockaddr_in6 *src_in6 =3D (struct sockaddr_in6 *)src; + struct sockaddr_in6 *dst_in6 =3D (struct sockaddr_in6 *)dst; + struct sockaddr_in *src_in =3D (struct sockaddr_in *)src; + struct sockaddr_in *dst_in =3D (struct sockaddr_in *)dst; + sa_family_t family =3D src->ss_family; + in_port_t sport, dport; encap_headers_t encap; struct iphdr ip; struct ipv6hdr ipv6; @@ -254,8 +217,11 @@ static size_t build_input(const struct test_cfg *test,= void *const buf, uint8_t *p =3D buf; int proto; =20 + sport =3D (family =3D=3D AF_INET) ? src_in->sin_port : src_in6->sin6_port; + dport =3D (family =3D=3D AF_INET) ? dst_in->sin_port : dst_in6->sin6_port; + proto =3D IPPROTO_IPIP; - if (tuple->family =3D=3D AF_INET6) + if (family =3D=3D AF_INET6) proto =3D IPPROTO_IPV6; =20 encap_init(&encap, test->hops =3D=3D ONE_HOP ? 1 : 0, proto); @@ -270,15 +236,15 @@ static size_t build_input(const struct test_cfg *test= , void *const buf, if (test->type =3D=3D UDP) proto =3D IPPROTO_UDP; =20 - switch (tuple->family) { + switch (family) { case AF_INET: ip =3D (struct iphdr){ .ihl =3D 5, .version =3D 4, .ttl =3D IPDEFTTL, .protocol =3D proto, - .saddr =3D tuple->src.in_addr.s_addr, - .daddr =3D tuple->dst.in_addr.s_addr, + .saddr =3D src_in->sin_addr.s_addr, + .daddr =3D dst_in->sin_addr.s_addr, }; p =3D mempcpy(p, &ip, sizeof(ip)); break; @@ -287,8 +253,8 @@ static size_t build_input(const struct test_cfg *test, = void *const buf, .version =3D 6, .hop_limit =3D IPDEFTTL, .nexthdr =3D proto, - .saddr =3D tuple->src.in6_addr, - .daddr =3D tuple->dst.in6_addr, + .saddr =3D src_in6->sin6_addr, + .daddr =3D dst_in6->sin6_addr, }; p =3D mempcpy(p, &ipv6, sizeof(ipv6)); break; @@ -303,18 +269,16 @@ static size_t build_input(const struct test_cfg *test= , void *const buf, case TCP: tcp =3D (struct tcphdr){ .source =3D sport, - .dest =3D tuple->dst.port, + .dest =3D dport, + .syn =3D (test->flags =3D=3D SYN), + .ack =3D (test->flags =3D=3D ACK), }; - if (test->flags =3D=3D SYN) - tcp.syn =3D true; - if (test->flags =3D=3D ACK) - tcp.ack =3D true; p =3D mempcpy(p, &tcp, sizeof(tcp)); break; case UDP: udp =3D (struct udphdr){ .source =3D sport, - .dest =3D tuple->dst.port, + .dest =3D dport, }; p =3D mempcpy(p, &udp, sizeof(udp)); break; @@ -339,27 +303,26 @@ static void test_cls_redirect_common(struct bpf_progr= am *prog) LIBBPF_OPTS(bpf_test_run_opts, tattr); int families[] =3D { AF_INET, AF_INET6 }; struct sockaddr_storage ss; - struct sockaddr *addr; socklen_t slen; int i, j, err, prog_fd; int servers[__NR_KIND][ARRAY_SIZE(families)] =3D {}; int conns[__NR_KIND][ARRAY_SIZE(families)] =3D {}; - struct tuple tuples[__NR_KIND][ARRAY_SIZE(families)]; + struct sockaddr_storage srcs[__NR_KIND][ARRAY_SIZE(families)]; + struct sockaddr_storage dsts[__NR_KIND][ARRAY_SIZE(families)]; =20 - addr =3D (struct sockaddr *)&ss; for (i =3D 0; i < ARRAY_SIZE(families); i++) { slen =3D prepare_addr(&ss, families[i]); if (CHECK_FAIL(!slen)) goto cleanup; =20 - if (CHECK_FAIL(!set_up_conn(addr, slen, SOCK_DGRAM, + if (CHECK_FAIL(!set_up_conn(&ss, slen, SOCK_DGRAM, &servers[UDP][i], &conns[UDP][i], - &tuples[UDP][i]))) + &srcs[UDP][i], &dsts[UDP][i]))) goto cleanup; =20 - if (CHECK_FAIL(!set_up_conn(addr, slen, SOCK_STREAM, + if (CHECK_FAIL(!set_up_conn(&ss, slen, SOCK_STREAM, &servers[TCP][i], &conns[TCP][i], - &tuples[TCP][i]))) + &srcs[TCP][i], &dsts[TCP][i]))) goto cleanup; } =20 @@ -368,11 +331,12 @@ static void test_cls_redirect_common(struct bpf_progr= am *prog) struct test_cfg *test =3D &tests[i]; =20 for (j =3D 0; j < ARRAY_SIZE(families); j++) { - struct tuple *tuple =3D &tuples[test->type][j]; + struct sockaddr_storage *src =3D &srcs[test->type][j]; + struct sockaddr_storage *dst =3D &dsts[test->type][j]; char input[256]; char tmp[256]; =20 - test_str(tmp, sizeof(tmp), test, tuple->family); + test_str(tmp, sizeof(tmp), test, families[j]); if (!test__start_subtest(tmp)) continue; =20 @@ -380,7 +344,7 @@ static void test_cls_redirect_common(struct bpf_program= *prog) tattr.data_size_out =3D sizeof(tmp); =20 tattr.data_in =3D input; - tattr.data_size_in =3D build_input(test, input, tuple); + tattr.data_size_in =3D build_input(test, input, src, dst); if (CHECK_FAIL(!tattr.data_size_in)) continue; =20 --=20 2.51.1