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Tue, 16 Sep 2025 07:49:10 -0700 (PDT) From: Richard Gobert To: netdev@vger.kernel.org, pabeni@redhat.com, ecree.xilinx@gmail.com, willemdebruijn.kernel@gmail.com Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, horms@kernel.org, corbet@lwn.net, saeedm@nvidia.com, tariqt@nvidia.com, mbloch@nvidia.com, leon@kernel.org, dsahern@kernel.org, ncardwell@google.com, kuniyu@google.com, shuah@kernel.org, sdf@fomichev.me, aleksander.lobakin@intel.com, florian.fainelli@broadcom.com, alexander.duyck@gmail.com, linux-kernel@vger.kernel.org, linux-net-drivers@amd.com, Richard Gobert , Willem de Bruijn Subject: [PATCH net-next v6 5/5] selftests/net: test ipip packets in gro.sh Date: Tue, 16 Sep 2025 16:48:41 +0200 Message-Id: <20250916144841.4884-6-richardbgobert@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250916144841.4884-1-richardbgobert@gmail.com> References: <20250916144841.4884-1-richardbgobert@gmail.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" Add IPIP test-cases to the GRO selftest. This selftest already contains IP ID test-cases. They are now also tested for encapsulated packets. This commit also fixes ipip packet generation in the test. Signed-off-by: Richard Gobert Reviewed-by: Willem de Bruijn --- tools/testing/selftests/net/gro.c | 49 ++++++++++++++++++++++++------ tools/testing/selftests/net/gro.sh | 2 +- 2 files changed, 40 insertions(+), 11 deletions(-) diff --git a/tools/testing/selftests/net/gro.c b/tools/testing/selftests/ne= t/gro.c index 3d4a82a2607c..2b1d9f2b3e9e 100644 --- a/tools/testing/selftests/net/gro.c +++ b/tools/testing/selftests/net/gro.c @@ -93,6 +93,7 @@ static bool tx_socket =3D true; static int tcp_offset =3D -1; static int total_hdr_len =3D -1; static int ethhdr_proto =3D -1; +static bool ipip; static const int num_flush_id_cases =3D 6; =20 static void vlog(const char *fmt, ...) @@ -114,7 +115,9 @@ static void setup_sock_filter(int fd) int ipproto_off, opt_ipproto_off; int next_off; =20 - if (proto =3D=3D PF_INET) + if (ipip) + next_off =3D sizeof(struct iphdr) + offsetof(struct iphdr, protocol); + else if (proto =3D=3D PF_INET) next_off =3D offsetof(struct iphdr, protocol); else next_off =3D offsetof(struct ipv6hdr, nexthdr); @@ -244,7 +247,7 @@ static void fill_datalinklayer(void *buf) eth->h_proto =3D ethhdr_proto; } =20 -static void fill_networklayer(void *buf, int payload_len) +static void fill_networklayer(void *buf, int payload_len, int protocol) { struct ipv6hdr *ip6h =3D buf; struct iphdr *iph =3D buf; @@ -254,7 +257,7 @@ static void fill_networklayer(void *buf, int payload_le= n) =20 ip6h->version =3D 6; ip6h->payload_len =3D htons(sizeof(struct tcphdr) + payload_len); - ip6h->nexthdr =3D IPPROTO_TCP; + ip6h->nexthdr =3D protocol; ip6h->hop_limit =3D 8; if (inet_pton(AF_INET6, addr6_src, &ip6h->saddr) !=3D 1) error(1, errno, "inet_pton source ip6"); @@ -266,7 +269,7 @@ static void fill_networklayer(void *buf, int payload_le= n) iph->version =3D 4; iph->ihl =3D 5; iph->ttl =3D 8; - iph->protocol =3D IPPROTO_TCP; + iph->protocol =3D protocol; iph->tot_len =3D htons(sizeof(struct tcphdr) + payload_len + sizeof(struct iphdr)); iph->frag_off =3D htons(0x4000); /* DF =3D 1, MF =3D 0 */ @@ -313,9 +316,19 @@ static void create_packet(void *buf, int seq_offset, i= nt ack_offset, { memset(buf, 0, total_hdr_len); memset(buf + total_hdr_len, 'a', payload_len); + fill_transportlayer(buf + tcp_offset, seq_offset, ack_offset, payload_len, fin); - fill_networklayer(buf + ETH_HLEN, payload_len); + + if (ipip) { + fill_networklayer(buf + ETH_HLEN, payload_len + sizeof(struct iphdr), + IPPROTO_IPIP); + fill_networklayer(buf + ETH_HLEN + sizeof(struct iphdr), + payload_len, IPPROTO_TCP); + } else { + fill_networklayer(buf + ETH_HLEN, payload_len, IPPROTO_TCP); + } + fill_datalinklayer(buf); } =20 @@ -416,6 +429,13 @@ static void recompute_packet(char *buf, char *no_ext, = int extlen) iph->tot_len =3D htons(ntohs(iph->tot_len) + extlen); iph->check =3D 0; iph->check =3D checksum_fold(iph, sizeof(struct iphdr), 0); + + if (ipip) { + iph +=3D 1; + iph->tot_len =3D htons(ntohs(iph->tot_len) + extlen); + iph->check =3D 0; + iph->check =3D checksum_fold(iph, sizeof(struct iphdr), 0); + } } else { ip6h->payload_len =3D htons(ntohs(ip6h->payload_len) + extlen); } @@ -777,7 +797,7 @@ static void send_fragment4(int fd, struct sockaddr_ll *= daddr) */ memset(buf + total_hdr_len, 'a', PAYLOAD_LEN * 2); fill_transportlayer(buf + tcp_offset, PAYLOAD_LEN, 0, PAYLOAD_LEN * 2, 0); - fill_networklayer(buf + ETH_HLEN, PAYLOAD_LEN); + fill_networklayer(buf + ETH_HLEN, PAYLOAD_LEN, IPPROTO_TCP); fill_datalinklayer(buf); =20 iph->frag_off =3D htons(0x6000); // DF =3D 1, MF =3D 1 @@ -1071,7 +1091,7 @@ static void gro_sender(void) * and min ipv6hdr size. Like MAX_HDR_SIZE, * MAX_PAYLOAD is defined with the larger header of the two. */ - int offset =3D proto =3D=3D PF_INET ? 20 : 0; + int offset =3D (proto =3D=3D PF_INET && !ipip) ? 20 : 0; int remainder =3D (MAX_PAYLOAD + offset) % MSS; =20 send_large(txfd, &daddr, remainder); @@ -1221,7 +1241,7 @@ static void gro_receiver(void) check_recv_pkts(rxfd, correct_payload, 2); } } else if (strcmp(testname, "large") =3D=3D 0) { - int offset =3D proto =3D=3D PF_INET ? 20 : 0; + int offset =3D (proto =3D=3D PF_INET && !ipip) ? 20 : 0; int remainder =3D (MAX_PAYLOAD + offset) % MSS; =20 correct_payload[0] =3D (MAX_PAYLOAD + offset); @@ -1250,6 +1270,7 @@ static void parse_args(int argc, char **argv) { "iface", required_argument, NULL, 'i' }, { "ipv4", no_argument, NULL, '4' }, { "ipv6", no_argument, NULL, '6' }, + { "ipip", no_argument, NULL, 'e' }, { "rx", no_argument, NULL, 'r' }, { "saddr", required_argument, NULL, 's' }, { "smac", required_argument, NULL, 'S' }, @@ -1259,7 +1280,7 @@ static void parse_args(int argc, char **argv) }; int c; =20 - while ((c =3D getopt_long(argc, argv, "46d:D:i:rs:S:t:v", opts, NULL)) != =3D -1) { + while ((c =3D getopt_long(argc, argv, "46d:D:ei:rs:S:t:v", opts, NULL)) != =3D -1) { switch (c) { case '4': proto =3D PF_INET; @@ -1269,6 +1290,11 @@ static void parse_args(int argc, char **argv) proto =3D PF_INET6; ethhdr_proto =3D htons(ETH_P_IPV6); break; + case 'e': + ipip =3D true; + proto =3D PF_INET; + ethhdr_proto =3D htons(ETH_P_IP); + break; case 'd': addr4_dst =3D addr6_dst =3D optarg; break; @@ -1304,7 +1330,10 @@ int main(int argc, char **argv) { parse_args(argc, argv); =20 - if (proto =3D=3D PF_INET) { + if (ipip) { + tcp_offset =3D ETH_HLEN + sizeof(struct iphdr) * 2; + total_hdr_len =3D tcp_offset + sizeof(struct tcphdr); + } else if (proto =3D=3D PF_INET) { tcp_offset =3D ETH_HLEN + sizeof(struct iphdr); total_hdr_len =3D tcp_offset + sizeof(struct tcphdr); } else if (proto =3D=3D PF_INET6) { diff --git a/tools/testing/selftests/net/gro.sh b/tools/testing/selftests/n= et/gro.sh index 9e3f186bc2a1..4c5144c6f652 100755 --- a/tools/testing/selftests/net/gro.sh +++ b/tools/testing/selftests/net/gro.sh @@ -4,7 +4,7 @@ readonly SERVER_MAC=3D"aa:00:00:00:00:02" readonly CLIENT_MAC=3D"aa:00:00:00:00:01" readonly TESTS=3D("data" "ack" "flags" "tcp" "ip" "large") -readonly PROTOS=3D("ipv4" "ipv6") +readonly PROTOS=3D("ipv4" "ipv6" "ipip") dev=3D"" test=3D"all" proto=3D"ipv4" --=20 2.36.1