Anna Emese Nyiri wrote:
> Introduce tests to verify the correct functionality of the SO_RCVMARK and
> SO_RCVPRIORITY socket options.
>
> Key changes include:
>
> - so_rcv_listener.c: Implements a receiver application to test the correct
> behavior of the SO_RCVMARK and SO_RCVPRIORITY options.
> - test_so_rcv.sh: Provides a shell script to automate testing for these options.
> - Makefile: Integrates test_so_rcv.sh into the kernel selftests.
>
> Suggested-by: Jakub Kicinski <kuba@xxxxxxxxxx>
> Suggested-by: Ferenc Fejes <fejes@xxxxxxxxxxx>
> Signed-off-by: Anna Emese Nyiri <annaemesenyiri@xxxxxxxxx>
No need for a cover letter to a single patch.
net-next is closed.
>
> ---
> tools/testing/selftests/net/Makefile | 1 +
> tools/testing/selftests/net/so_rcv_listener.c | 147 ++++++++++++++++++
> tools/testing/selftests/net/test_so_rcv.sh | 56 +++++++
> 3 files changed, 204 insertions(+)
> create mode 100644 tools/testing/selftests/net/so_rcv_listener.c
> create mode 100755 tools/testing/selftests/net/test_so_rcv.sh
>
> diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
> index 73ee88d6b043..98f05473e672 100644
> --- a/tools/testing/selftests/net/Makefile
> +++ b/tools/testing/selftests/net/Makefile
> @@ -33,6 +33,7 @@ TEST_PROGS += gro.sh
> TEST_PROGS += gre_gso.sh
> TEST_PROGS += cmsg_so_mark.sh
> TEST_PROGS += cmsg_so_priority.sh
> +TEST_PROGS += test_so_rcv.sh
> TEST_PROGS += cmsg_time.sh cmsg_ipv6.sh
> TEST_PROGS += netns-name.sh
> TEST_PROGS += nl_netdev.py
> diff --git a/tools/testing/selftests/net/so_rcv_listener.c b/tools/testing/selftests/net/so_rcv_listener.c
> new file mode 100644
> index 000000000000..53b09582a7e3
> --- /dev/null
> +++ b/tools/testing/selftests/net/so_rcv_listener.c
> @@ -0,0 +1,147 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <errno.h>
> +#include <netdb.h>
> +#include <stdbool.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <unistd.h>
> +#include <linux/types.h>
> +#include <sys/socket.h>
> +#include <netinet/in.h>
> +#include <arpa/inet.h>
> +
> +#ifndef SO_RCVPRIORITY
> +#define SO_RCVPRIORITY 82
> +#endif
> +
> +struct options {
> + __u32 val;
> + int name;
> + int rcvname;
> + const char *host;
> + const char *service;
> +} opt;
> +
> +static void __attribute__((noreturn)) usage(const char *bin)
> +{
> + printf("Usage: %s [opts] <dst host> <dst port / service>\n", bin);
> + printf("Options:\n"
> + "\t\t-M val Test SO_RCVMARK\n"
> + "\t\t-P val Test SO_RCVPRIORITY\n"
> + "");
> + exit(EXIT_FAILURE);
> +}
> +
> +static void parse_args(int argc, char *argv[])
> +{
> + int o;
> +
> + while ((o = getopt(argc, argv, "M:P:")) != -1) {
> + switch (o) {
> + case 'M':
> + opt.val = atoi(optarg);
> + opt.name = SO_MARK;
> + opt.rcvname = SO_RCVMARK;
> + break;
> + case 'P':
> + opt.val = atoi(optarg);
> + opt.name = SO_PRIORITY;
> + opt.rcvname = SO_RCVPRIORITY;
> + break;
> + default:
> + usage(argv[0]);
> + break;
> + }
> + }
> +
> + if (optind != argc - 2)
> + usage(argv[0]);
> +
> + opt.host = argv[optind];
> + opt.service = argv[optind + 1];
> +}
> +
> +int main(int argc, char *argv[])
> +{
> + int err = 0;
> + int recv_fd = -1;
> + int ret_value = 0;
> + __u32 recv_val;
> + struct cmsghdr *cmsg;
> + char cbuf[1024];
Please use CMSG_SPACE and anticipate the minimum required space needed.
> + char recv_buf[1024];
> + struct iovec iov[1];
> + struct msghdr msg;
> + struct sockaddr_in recv_addr;
In general code should not be IPv4 only. In this case the logic in the
kernel is the same for IPv4 and IPv6, so I guess it's okay. If
explicitly testing only one of the two, I would suggest IPv6.
> +
> + parse_args(argc, argv);
> +
> + recv_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
> + if (recv_fd < 0) {
> + perror("Can't open recv socket");
> + ret_value = -errno;
> + goto cleanup;
> + }
> +
> + err = setsockopt(recv_fd, SOL_SOCKET, opt.rcvname, &opt.val, sizeof(opt.val));
> + if (err < 0) {
> + perror("Recv setsockopt error");
> + ret_value = -errno;
> + goto cleanup;
> + }
> +
> + memset(&recv_addr, 0, sizeof(recv_addr));
> + recv_addr.sin_family = AF_INET;
> + recv_addr.sin_port = htons(atoi(opt.service));
> +
> + if (inet_pton(AF_INET, opt.host, &recv_addr.sin_addr) <= 0) {
> + perror("Invalid address");
> + ret_value = -errno;
> + goto cleanup;
> + }
> +
> + err = bind(recv_fd, (struct sockaddr *)&recv_addr, sizeof(recv_addr));
> + if (err < 0) {
> + perror("Recv bind error");
> + ret_value = -errno;
> + goto cleanup;
> + }
> +
> + iov[0].iov_base = recv_buf;
> + iov[0].iov_len = sizeof(recv_buf);
> +
> + memset(&msg, 0, sizeof(msg));
> + msg.msg_iov = iov;
> + msg.msg_iovlen = 1;
> + msg.msg_control = cbuf;
> + msg.msg_controllen = sizeof(cbuf);
> +
> + err = recvmsg(recv_fd, &msg, 0);
> + if (err < 0) {
> + perror("Message receive error");
> + ret_value = -errno;
> + goto cleanup;
> + }
> +
> + for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
> + if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == opt.name) {
> + recv_val = *(__u32 *)CMSG_DATA(cmsg);
> + printf("Received value: %u\n", recv_val);
> +
> + if (recv_val != opt.val) {
> + fprintf(stderr, "Error: expected value: %u, got: %u\n",
> + opt.val, recv_val);
> + ret_value = -EINVAL;
> + goto cleanup;
> + }
> + }
> + }
> +
> +cleanup:
> + if (recv_fd >= 0)
> + close(recv_fd);
> +
> + return ret_value;
> +}
> diff --git a/tools/testing/selftests/net/test_so_rcv.sh b/tools/testing/selftests/net/test_so_rcv.sh
> new file mode 100755
> index 000000000000..12d37f9ab905
> --- /dev/null
> +++ b/tools/testing/selftests/net/test_so_rcv.sh
> @@ -0,0 +1,56 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +
> +HOST=127.0.0.1
> +PORT=1234
> +TOTAL_TESTS=0
> +FAILED_TESTS=0
> +
> +declare -A TESTS=(
> + ["SO_RCVPRIORITY"]="-P 2"
> + ["SO_RCVMARK"]="-M 3"
> +)
> +
> +check_result() {
> + ((TOTAL_TESTS++))
> + if [ "$1" -ne 0 ]; then
> + ((FAILED_TESTS++))
> + fi
> +}
> +
> +for test_name in "${!TESTS[@]}"; do
> + echo "Running $test_name test"
> + arg=${TESTS[$test_name]}
> +
> + ./so_rcv_listener $arg $HOST $PORT &
> + LISTENER_PID=$!
> +
> + if ./cmsg_sender $arg $HOST $PORT; then
> + echo "Sender succeeded for $test_name"
nit: such verbose comments are not very informative.
> + else
> + echo "Sender failed for $test_name"
> + kill "$LISTENER_PID" 2>/dev/null
> + wait "$LISTENER_PID"
> + check_result 1
> + continue
> + fi
> +
> + wait "$LISTENER_PID"
> + LISTENER_EXIT_CODE=$?
> +
> + if [ "$LISTENER_EXIT_CODE" -eq 0 ]; then
> + echo "Rcv test OK for $test_name"
> + check_result 0
> + else
> + echo "Rcv test FAILED for $test_name"
> + check_result 1
> + fi
> +done
> +
> +if [ "$FAILED_TESTS" -ne 0 ]; then
> + echo "FAIL - $FAILED_TESTS/$TOTAL_TESTS tests failed"
> + exit 1
please use kselftest exit codes: KSFT_FAIL
> +else
> + echo "OK - All $TOTAL_TESTS tests passed"
> + exit 0
KSFT_PASS
> +fi
> --
> 2.43.0
>
