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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: test fd passing with MSG_RING
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <pthread.h>
#include "liburing.h"
#include "helpers.h"
static int no_msg;
static int no_sparse;
static int no_fd_pass;
struct data {
pthread_t thread;
pthread_barrier_t barrier;
int ring_flags;
int ring_fd;
char buf[32];
};
static void *thread_fn(void *__data)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct data *d = __data;
struct io_uring ring;
int ret, fd = -1;
io_uring_queue_init(8, &ring, d->ring_flags);
ret = io_uring_register_files(&ring, &fd, 1);
if (ret) {
if (ret != -EINVAL && ret != -EBADF)
fprintf(stderr, "thread file register: %d\n", ret);
no_sparse = 1;
pthread_barrier_wait(&d->barrier);
return NULL;
}
d->ring_fd = ring.ring_fd;
pthread_barrier_wait(&d->barrier);
/* wait for MSG */
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe dst: %d\n", ret);
return NULL;
}
if (cqe->res < 0) {
fprintf(stderr, "cqe error dst: %d\n", cqe->res);
return NULL;
}
fd = cqe->res;
io_uring_cqe_seen(&ring, cqe);
sqe = io_uring_get_sqe(&ring);
io_uring_prep_read(sqe, fd, d->buf, sizeof(d->buf), 0);
sqe->flags |= IOSQE_FIXED_FILE;
io_uring_submit(&ring);
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe dst: %d\n", ret);
return NULL;
}
if (cqe->res < 0) {
fprintf(stderr, "cqe error dst: %d\n", cqe->res);
return NULL;
}
io_uring_queue_exit(&ring);
return NULL;
}
static int test_remote(struct io_uring *src, int ring_flags)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int fds[2], fd, ret;
struct data d;
char buf[32];
void *tret;
int i;
if (no_fd_pass)
return 0;
pthread_barrier_init(&d.barrier, NULL, 2);
d.ring_flags = ring_flags;
pthread_create(&d.thread, NULL, thread_fn, &d);
pthread_barrier_wait(&d.barrier);
memset(d.buf, 0, sizeof(d.buf));
if (no_sparse)
return 0;
if (pipe(fds) < 0) {
perror("pipe");
return 1;
}
fd = fds[0];
ret = io_uring_register_files(src, &fd, 1);
if (ret) {
fprintf(stderr, "register files failed: %d\n", ret);
return 1;
}
for (i = 0; i < ARRAY_SIZE(buf); i++)
buf[i] = rand();
sqe = io_uring_get_sqe(src);
io_uring_prep_write(sqe, fds[1], buf, sizeof(buf), 0);
sqe->user_data = 1;
sqe = io_uring_get_sqe(src);
io_uring_prep_msg_ring_fd(sqe, d.ring_fd, 0, 0, 0, 0);
sqe->user_data = 2;
io_uring_submit(src);
for (i = 0; i < 2; i++) {
ret = io_uring_wait_cqe(src, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe: %d\n", ret);
return 1;
}
if (cqe->res < 0) {
fprintf(stderr, "cqe res %d\n", cqe->res);
return 1;
}
if (cqe->user_data == 1 && cqe->res != sizeof(buf)) {
fprintf(stderr, "short write %d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(src, cqe);
}
pthread_join(d.thread, &tret);
if (memcmp(buf, d.buf, sizeof(buf))) {
fprintf(stderr, "buffers differ\n");
return 1;
}
close(fds[0]);
close(fds[1]);
io_uring_unregister_files(src);
return 0;
}
static int test_local(struct io_uring *src, struct io_uring *dst)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int fds[2], fd, ret;
char buf[32], dst_buf[32];
int i;
if (no_fd_pass)
return 0;
fd = -1;
ret = io_uring_register_files(dst, &fd, 1);
if (ret) {
if (ret == -EBADF || ret == -EINVAL)
return 0;
fprintf(stderr, "register files failed: %d\n", ret);
return 1;
}
if (pipe(fds) < 0) {
perror("pipe");
return 1;
}
fd = fds[0];
ret = io_uring_register_files(src, &fd, 1);
if (ret) {
fprintf(stderr, "register files failed: %d\n", ret);
return 1;
}
memset(dst_buf, 0, sizeof(dst_buf));
for (i = 0; i < ARRAY_SIZE(buf); i++)
buf[i] = rand();
sqe = io_uring_get_sqe(src);
io_uring_prep_write(sqe, fds[1], buf, sizeof(buf), 0);
sqe->user_data = 1;
sqe = io_uring_get_sqe(src);
io_uring_prep_msg_ring_fd(sqe, dst->ring_fd, 0, 0, 10, 0);
sqe->user_data = 2;
io_uring_submit(src);
fd = -1;
for (i = 0; i < 2; i++) {
ret = io_uring_wait_cqe(src, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe: %d\n", ret);
return 1;
}
if (cqe->user_data == 2 && cqe->res == -EINVAL) {
no_fd_pass = 1;
} else if (cqe->res < 0) {
fprintf(stderr, "cqe res %d\n", cqe->res);
return 1;
}
if (cqe->user_data == 1 && cqe->res != sizeof(buf)) {
fprintf(stderr, "short write %d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(src, cqe);
}
if (no_fd_pass)
goto out;
ret = io_uring_wait_cqe(dst, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe dst: %d\n", ret);
return 1;
}
if (cqe->res < 0) {
fprintf(stderr, "cqe error dst: %d\n", cqe->res);
return 1;
}
fd = cqe->res;
io_uring_cqe_seen(dst, cqe);
sqe = io_uring_get_sqe(dst);
io_uring_prep_read(sqe, fd, dst_buf, sizeof(dst_buf), 0);
sqe->flags |= IOSQE_FIXED_FILE;
sqe->user_data = 3;
io_uring_submit(dst);
ret = io_uring_wait_cqe(dst, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe dst: %d\n", ret);
return 1;
}
if (cqe->res < 0) {
fprintf(stderr, "cqe error dst: %d\n", cqe->res);
return 1;
}
if (cqe->res != sizeof(dst_buf)) {
fprintf(stderr, "short read %d\n", cqe->res);
return 1;
}
if (memcmp(buf, dst_buf, sizeof(buf))) {
fprintf(stderr, "buffers differ\n");
return 1;
}
out:
close(fds[0]);
close(fds[1]);
io_uring_unregister_files(src);
io_uring_unregister_files(dst);
return 0;
}
static int test(int ring_flags)
{
struct io_uring ring, ring2;
int ret;
ret = io_uring_queue_init(8, &ring, ring_flags);
if (ret) {
if (ret == -EINVAL)
return 0;
fprintf(stderr, "ring setup failed: %d\n", ret);
return T_EXIT_FAIL;
}
ret = io_uring_queue_init(8, &ring2, ring_flags);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return T_EXIT_FAIL;
}
ret = test_local(&ring, &ring2);
if (ret) {
fprintf(stderr, "test local failed\n");
return T_EXIT_FAIL;
}
if (no_msg)
return T_EXIT_SKIP;
ret = test_remote(&ring, ring_flags);
if (ret) {
fprintf(stderr, "test_remote failed\n");
return T_EXIT_FAIL;
}
io_uring_queue_exit(&ring);
io_uring_queue_exit(&ring2);
return T_EXIT_PASS;
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 1)
return T_EXIT_SKIP;
ret = test(0);
if (ret != T_EXIT_PASS) {
fprintf(stderr, "ring flags 0 failed\n");
return ret;
}
if (no_msg)
return T_EXIT_SKIP;
ret = test(IORING_SETUP_SINGLE_ISSUER|IORING_SETUP_DEFER_TASKRUN);
if (ret != T_EXIT_PASS) {
fprintf(stderr, "ring flags defer failed\n");
return ret;
}
return ret;
}
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