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/* SPDX-License-Identifier: MIT */
/*
* Description: IOPOLL with overflow test case
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#include <poll.h>
#include <sys/eventfd.h>
#include <sys/resource.h>
#include "helpers.h"
#include "liburing.h"
#include "../src/syscall.h"
#define FILE_SIZE (128 * 1024)
#define BS 4096
#define BUFFERS (FILE_SIZE / BS)
static struct iovec *vecs;
static int test(struct io_uring *ring, int fd)
{
struct io_uring_sqe *sqe;
int i, j, ret;
loff_t off;
off = FILE_SIZE - BS;
for (j = 0; j < 8; j++) {
for (i = 0; i < BUFFERS; i++) {
sqe = io_uring_get_sqe(ring);
io_uring_prep_read(sqe, fd, vecs[i].iov_base,
vecs[i].iov_len, off);
if (!off)
off = FILE_SIZE - BS;
else
off -= BS;
}
ret = io_uring_submit(ring);
if (ret != BUFFERS) {
fprintf(stderr, "submitted %d\n", ret);
return T_EXIT_FAIL;
}
}
sleep(1);
ret = __sys_io_uring_enter(ring->ring_fd, 0, BUFFERS * 8,
IORING_ENTER_GETEVENTS, NULL);
for (i = 0; i < BUFFERS * 8; i++) {
struct io_uring_cqe *cqe;
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "wait=%d\n", ret);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(ring, cqe);
}
return T_EXIT_PASS;
}
int main(int argc, char *argv[])
{
struct io_uring_params p = { };
struct io_uring ring;
char buf[256];
char *fname;
int ret, fd;
p.flags = IORING_SETUP_IOPOLL | IORING_SETUP_CQSIZE |
IORING_SETUP_SUBMIT_ALL;
p.cq_entries = 64;
ret = t_create_ring_params(64, &ring, &p);
if (ret == T_SETUP_SKIP || ret == -EINVAL)
return T_EXIT_SKIP;
if (ret != T_SETUP_OK) {
fprintf(stderr, "ring create failed: %d\n", ret);
return T_EXIT_FAIL;
}
if (argc > 1) {
fname = argv[1];
} else {
srand((unsigned)time(NULL));
snprintf(buf, sizeof(buf), ".basic-rw-%u-%u",
(unsigned)rand(), (unsigned)getpid());
fname = buf;
t_create_file(fname, FILE_SIZE);
}
fd = open(fname, O_RDONLY | O_DIRECT);
if (fd < 0) {
if (errno == EINVAL || errno == EACCES || errno == EPERM) {
if (fname != argv[1])
unlink(fname);
return T_EXIT_SKIP;
}
perror("open");
goto err;
}
vecs = t_create_buffers(BUFFERS, BS);
ret = test(&ring, fd);
if (fname != argv[1])
unlink(fname);
return ret;
err:
if (fname != argv[1])
unlink(fname);
return T_EXIT_FAIL;
}
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