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Miller" , Eric Dumazet , Shuah Khan , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , linux-kernel@vger.kernel.org (open list), linux-kselftest@vger.kernel.org (open list:KERNEL SELFTEST FRAMEWORK), bpf@vger.kernel.org (open list:XDP (eXpress Data Path):Keyword:(?:\b|_)xdp(?:\b|_)) Subject: [PATCH net-next v4 3/3] selftests: drv-net: Test that NAPI ID is non-zero Date: Thu, 24 Apr 2025 00:27:33 +0000 Message-ID: <20250424002746.16891-4-jdamato@fastly.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250424002746.16891-1-jdamato@fastly.com> References: <20250424002746.16891-1-jdamato@fastly.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" Test that the SO_INCOMING_NAPI_ID of a network file descriptor is non-zero. This ensures that either the core networking stack or, in some cases like netdevsim, the driver correctly sets the NAPI ID. Signed-off-by: Joe Damato --- .../testing/selftests/drivers/net/.gitignore | 1 + tools/testing/selftests/drivers/net/Makefile | 6 +- .../testing/selftests/drivers/net/napi_id.py | 23 +++++ .../selftests/drivers/net/napi_id_helper.c | 83 +++++++++++++++++++ 4 files changed, 112 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/drivers/net/napi_id.py create mode 100644 tools/testing/selftests/drivers/net/napi_id_helper.c diff --git a/tools/testing/selftests/drivers/net/.gitignore b/tools/testing= /selftests/drivers/net/.gitignore index ec746f374e85..72d2124fd513 100644 --- a/tools/testing/selftests/drivers/net/.gitignore +++ b/tools/testing/selftests/drivers/net/.gitignore @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only +napi_id_helper xdp_helper diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/s= elftests/drivers/net/Makefile index 0c95bd944d56..47247c2ef948 100644 --- a/tools/testing/selftests/drivers/net/Makefile +++ b/tools/testing/selftests/drivers/net/Makefile @@ -6,9 +6,13 @@ TEST_INCLUDES :=3D $(wildcard lib/py/*.py) \ ../../net/net_helper.sh \ ../../net/lib.sh \ =20 -TEST_GEN_FILES :=3D xdp_helper +TEST_GEN_FILES :=3D \ + napi_id_helper \ + xdp_helper \ +# end of TEST_GEN_FILES =20 TEST_PROGS :=3D \ + napi_id.py \ netcons_basic.sh \ netcons_fragmented_msg.sh \ netcons_overflow.sh \ diff --git a/tools/testing/selftests/drivers/net/napi_id.py b/tools/testing= /selftests/drivers/net/napi_id.py new file mode 100755 index 000000000000..356bac46ba04 --- /dev/null +++ b/tools/testing/selftests/drivers/net/napi_id.py @@ -0,0 +1,23 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 + +from lib.py import ksft_run, ksft_exit +from lib.py import ksft_eq, NetDrvEpEnv +from lib.py import bkg, cmd, rand_port, NetNSEnter + +def test_napi_id(cfg) -> None: + port =3D rand_port() + listen_cmd =3D f"{cfg.test_dir}/napi_id_helper {cfg.addr_v['4']} {port= }" + + with bkg(listen_cmd, ksft_wait=3D3) as server: + cmd(f"echo a | socat - TCP:{cfg.addr_v['4']}:{port}", host=3Dcfg.r= emote, shell=3DTrue) + + ksft_eq(0, server.ret) + +def main() -> None: + with NetDrvEpEnv(__file__) as cfg: + ksft_run([test_napi_id], args=3D(cfg,)) + ksft_exit() + +if __name__ =3D=3D "__main__": + main() diff --git a/tools/testing/selftests/drivers/net/napi_id_helper.c b/tools/t= esting/selftests/drivers/net/napi_id_helper.c new file mode 100644 index 000000000000..7e8e7d373b61 --- /dev/null +++ b/tools/testing/selftests/drivers/net/napi_id_helper.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include + +#include "ksft.h" + +int main(int argc, char *argv[]) +{ + struct sockaddr_in address; + unsigned int napi_id; + unsigned int port; + socklen_t optlen; + char buf[1024]; + int opt =3D 1; + int server; + int client; + int ret; + + server =3D socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); + if (server < 0) { + perror("socket creation failed"); + if (errno =3D=3D EAFNOSUPPORT) + return -1; + return 1; + } + + port =3D atoi(argv[2]); + + if (setsockopt(server, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt))) { + perror("setsockopt"); + return 1; + } + + address.sin_family =3D AF_INET; + inet_pton(AF_INET, argv[1], &address.sin_addr); + address.sin_port =3D htons(port); + + if (bind(server, (struct sockaddr *)&address, sizeof(address)) < 0) { + perror("bind failed"); + return 1; + } + + if (listen(server, 1) < 0) { + perror("listen"); + return 1; + } + + ksft_ready(); + + client =3D accept(server, NULL, 0); + if (client < 0) { + perror("accept"); + return 1; + } + + optlen =3D sizeof(napi_id); + ret =3D getsockopt(client, SOL_SOCKET, SO_INCOMING_NAPI_ID, &napi_id, + &optlen); + if (ret !=3D 0) { + perror("getsockopt"); + return 1; + } + + read(client, buf, 1024); + + ksft_wait(); + + if (napi_id =3D=3D 0) { + fprintf(stderr, "napi ID is 0\n"); + return 1; + } + + close(client); + close(server); + + return 0; +} --=20 2.43.0