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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: run NAPI receive test. Meant to be run from the associated
* script, napi-test.sh. That will invoke this test program
* as either a sender or receiver, with the queue flags passed
* in for testing.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <arpa/inet.h>
#include <linux/if_packet.h>
#include <linux/socket.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include "liburing.h"
#include "helpers.h"
static const char receiver_address[] = "10.10.10.20";
static const int port = 9999;
#define BUF_SIZE 4096
static char buffer[BUF_SIZE];
static unsigned current_byte = 0;
static void do_setsockopt(int fd, int level, int optname, int val)
{
int ret = setsockopt(fd, level, optname, &val, sizeof(val));
assert(ret == 0);
}
static int sender(int queue_flags)
{
unsigned long long written = 0;
struct sockaddr_in addr;
struct io_uring ring;
int i, ret, fd;
/*
* Sender doesn't use the ring, but try and set one up with the same
* flags that the receiver will use. If that fails, we know the
* receiver will have failed too - just skip the test in that case.
*/
ret = io_uring_queue_init(1, &ring, queue_flags);
if (ret)
return T_EXIT_SKIP;
io_uring_queue_exit(&ring);
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
ret = inet_pton(AF_INET, receiver_address, &addr.sin_addr);
assert(ret == 1);
fd = socket(PF_INET, SOCK_STREAM, 0);
assert(fd >= 0);
/* don't race with receiver, give it 1 second to connect */
i = 0;
do {
ret = connect(fd, (void *)&addr, sizeof(addr));
if (!ret)
break;
if (ret == -1 && errno == ECONNREFUSED) {
if (i >= 10000) {
fprintf(stderr, "Gave up trying to connect\n");
return 1;
}
usleep(100);
continue;
}
i++;
} while (1);
while (written < 8 * 1024 * 1024) {
for (i = 0; i < BUF_SIZE; i++)
buffer[i] = current_byte + i;
ret = write(fd, buffer, BUF_SIZE);
if (ret <= 0) {
if (!ret || errno == ECONNRESET)
break;
fprintf(stderr, "write failed %i %i\n", ret, errno);
return 1;
}
written += ret;
current_byte += ret;
}
close(fd);
return 0;
}
static int receiver(int queue_flags)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct io_uring ring;
struct io_uring_napi napi = { };
struct sockaddr_in addr;
int fd, listen_fd;
int i, ret;
ret = io_uring_queue_init(8, &ring, queue_flags);
if (ret < 0) {
if (ret == -EINVAL)
return T_EXIT_SKIP;
fprintf(stderr, "queue_init: %s\n", strerror(-ret));
return 1;
}
napi.prefer_busy_poll = 1;
napi.busy_poll_to = 50;
io_uring_register_napi(&ring, &napi);
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = INADDR_ANY;
listen_fd = socket(AF_INET, SOCK_STREAM, 0);
assert(listen_fd >= 0);
do_setsockopt(listen_fd, SOL_SOCKET, SO_REUSEPORT, 1);
ret = bind(listen_fd, (void *)&addr, sizeof(addr));
if (ret) {
fprintf(stderr, "bind failed %i %i\n", ret, errno);
return 1;
}
ret = listen(listen_fd, 8);
assert(ret == 0);
fd = accept(listen_fd, NULL, NULL);
assert(fd >= 0);
while (1) {
sqe = io_uring_get_sqe(&ring);
io_uring_prep_recv(sqe, fd, buffer, BUF_SIZE, 0);
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "io_uring_submit: %i\n", ret);
return 1;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "io_uring_wait_cqe: %i\n", ret);
return 1;
}
ret = cqe->res;
if (ret <= 0) {
if (!ret)
break;
fprintf(stderr, "recv failed %i %i\n", ret, errno);
return 1;
}
for (i = 0; i < ret; i++) {
char expected = current_byte + i;
if (buffer[i] != expected) {
fprintf(stderr, "data mismatch: idx %i, %c vs %c\n",
i, buffer[i], expected);
return 1;
}
}
current_byte += ret;
io_uring_cqe_seen(&ring, cqe);
}
close(fd);
io_uring_queue_exit(&ring);
return 0;
}
int main(int argc, char **argv)
{
int queue_flags;
int is_rx;
if (geteuid()) {
fprintf(stdout, "NAPI test requires root\n");
return T_EXIT_SKIP;
}
if (argc == 1) {
struct stat sb;
if (!stat("napi-test.sh", &sb)) {
return system("bash napi-test.sh");
} else if (!stat("test/napi-test.sh", &sb)) {
return system("bash test/napi-test.sh");
} else {
fprintf(stderr, "Can't find napi-test.sh\n");
return T_EXIT_SKIP;
}
} else if (argc == 2) {
return T_EXIT_SKIP;
} else if (argc != 3) {
return T_EXIT_SKIP;
}
if (!strcmp(argv[1], "receive"))
is_rx = 1;
else if (!strcmp(argv[1], "send"))
is_rx = 0;
else
return T_EXIT_FAIL;
queue_flags = strtoul(argv[2], NULL, 16);
if (is_rx)
return receiver(queue_flags);
return sender(queue_flags);
}
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