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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: check that racing wakeups don't re-issue a poll multishot,
* this can leak ring provided buffers. also test if ring
* provided buffers for regular receive can leak if we hit a
* poll race.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <string.h>
#include <sys/socket.h>
#include "liburing.h"
#include "helpers.h"
#define NREQS 64
#define BUF_SIZE 64
static int no_buf_ring;
struct data {
pthread_barrier_t barrier;
int fd;
};
static void *thread(void *data)
{
struct data *d = data;
char buf[BUF_SIZE];
int ret, i, fd;
memset(buf, 0x5a, BUF_SIZE);
pthread_barrier_wait(&d->barrier);
fd = d->fd;
for (i = 0; i < NREQS; i++) {
ret = write(fd, buf, sizeof(buf));
if (ret != BUF_SIZE) {
if (ret < 0) {
perror("write");
printf("bad fd %d\n", fd);
} else
fprintf(stderr, "wrote short %d\n", ret);
}
}
return NULL;
}
static int test(struct io_uring *ring, struct data *d)
{
struct io_uring_buf_ring *br;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int fd[2], ret, i;
pthread_t t;
void *buf, *ptr;
void *ret2;
if (socketpair(PF_LOCAL, SOCK_STREAM, 0, fd) < 0) {
perror("socketpair");
return T_EXIT_FAIL;
}
d->fd = fd[1];
if (posix_memalign((void **) &buf, 16384, BUF_SIZE * NREQS))
return T_EXIT_FAIL;
br = io_uring_setup_buf_ring(ring, NREQS, 1, 0, &ret);
if (!br) {
if (ret == -EINVAL) {
no_buf_ring = 1;
return T_EXIT_SKIP;
}
fprintf(stderr, "buf ring reg %d\n", ret);
return T_EXIT_FAIL;
}
ptr = buf;
for (i = 0; i < NREQS; i++) {
io_uring_buf_ring_add(br, ptr, BUF_SIZE, i + 1,
io_uring_buf_ring_mask(NREQS), i);
ptr += BUF_SIZE;
}
io_uring_buf_ring_advance(br, NREQS);
pthread_create(&t, NULL, thread, d);
for (i = 0; i < NREQS; i++) {
sqe = io_uring_get_sqe(ring);
io_uring_prep_recv(sqe, fd[0], NULL, 0, 0);
sqe->flags |= IOSQE_BUFFER_SELECT;
sqe->buf_group = 1;
}
pthread_barrier_wait(&d->barrier);
ret = io_uring_submit(ring);
if (ret != NREQS) {
fprintf(stderr, "submit %d\n", ret);
return T_EXIT_FAIL;
}
i = 0;
do {
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "cqe wait %d\n", ret);
return T_EXIT_FAIL;
}
i++;
if (cqe->res != BUF_SIZE) {
fprintf(stderr, "Bad cqe res %d\n", cqe->res);
break;
}
if (cqe->flags & IORING_CQE_F_BUFFER) {
int bid = cqe->flags >> 16;
if (bid > NREQS) {
fprintf(stderr, "Bad BID %d\n", bid);
return T_EXIT_FAIL;
}
} else {
fprintf(stderr, "No BID set!\n");
printf("ret=%d\n", cqe->res);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(ring, cqe);
if (i > NREQS) {
fprintf(stderr, "Got too many requests?\n");
return T_EXIT_FAIL;
}
} while (i < NREQS);
pthread_join(t, &ret2);
free(buf);
io_uring_free_buf_ring(ring, br, NREQS, 1);
close(fd[0]);
close(fd[1]);
return T_EXIT_PASS;
}
static int test_mshot(struct io_uring *ring, struct data *d)
{
struct io_uring_buf_ring *br;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int fd[2], ret, i;
pthread_t t;
void *buf, *ptr;
void *ret2;
if (socketpair(PF_LOCAL, SOCK_STREAM, 0, fd) < 0) {
perror("socketpair");
return T_EXIT_FAIL;
}
d->fd = fd[1];
if (posix_memalign((void *) &buf, 16384, BUF_SIZE * NREQS))
return T_EXIT_FAIL;
br = io_uring_setup_buf_ring(ring, NREQS, 1, 0, &ret);
if (!br) {
fprintf(stderr, "buf ring reg %d\n", ret);
return T_EXIT_FAIL;
}
ptr = buf;
for (i = 0; i < NREQS; i++) {
io_uring_buf_ring_add(br, ptr, BUF_SIZE, i + 1,
io_uring_buf_ring_mask(NREQS), i);
ptr += BUF_SIZE;
}
io_uring_buf_ring_advance(br, NREQS);
pthread_create(&t, NULL, thread, d);
sqe = io_uring_get_sqe(ring);
io_uring_prep_recv_multishot(sqe, fd[0], NULL, 0, 0);
sqe->flags |= IOSQE_BUFFER_SELECT;
sqe->buf_group = 1;
pthread_barrier_wait(&d->barrier);
ret = io_uring_submit(ring);
if (ret != 1) {
fprintf(stderr, "submit %d\n", ret);
return T_EXIT_FAIL;
}
i = 0;
do {
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "cqe wait %d\n", ret);
return T_EXIT_FAIL;
}
i++;
if (!(cqe->flags & IORING_CQE_F_MORE))
break;
if (cqe->res != BUF_SIZE) {
fprintf(stderr, "Bad cqe res %d\n", cqe->res);
break;
}
if (cqe->flags & IORING_CQE_F_BUFFER) {
int bid = cqe->flags >> 16;
if (bid > NREQS) {
fprintf(stderr, "Bad BID %d\n", bid);
return T_EXIT_FAIL;
}
} else {
fprintf(stderr, "No BID set!\n");
printf("ret=%d\n", cqe->res);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(ring, cqe);
if (i > NREQS) {
fprintf(stderr, "Got too many requests?\n");
return T_EXIT_FAIL;
}
} while (1);
if (i != NREQS + 1) {
fprintf(stderr, "Only got %d requests\n", i);
return T_EXIT_FAIL;
}
pthread_join(t, &ret2);
io_uring_free_buf_ring(ring, br, NREQS, 1);
free(buf);
close(fd[0]);
close(fd[1]);
return T_EXIT_PASS;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
struct data d;
int i, ret;
if (argc > 1)
return T_EXIT_SKIP;
pthread_barrier_init(&d.barrier, NULL, 2);
for (i = 0; i < 1000; i++) {
io_uring_queue_init(NREQS, &ring, 0);
ret = test(&ring, &d);
if (ret != T_EXIT_PASS) {
if (no_buf_ring)
break;
fprintf(stderr, "Test failed loop %d\n", i);
return T_EXIT_FAIL;
}
io_uring_queue_exit(&ring);
}
if (no_buf_ring)
return T_EXIT_SKIP;
for (i = 0; i < 1000; i++) {
io_uring_queue_init(NREQS, &ring, 0);
ret = test_mshot(&ring, &d);
if (ret != T_EXIT_PASS) {
fprintf(stderr, "Test mshot failed loop %d\n", i);
return T_EXIT_FAIL;
}
io_uring_queue_exit(&ring);
}
return T_EXIT_PASS;
}
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