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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: test io_uring fpos handling
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <assert.h>
#include "helpers.h"
#include "liburing.h"
#define FILE_SIZE 5000
#define QUEUE_SIZE 2048
static void create_file(const char *file, size_t size)
{
ssize_t ret;
char *buf;
size_t idx;
int fd;
buf = t_malloc(size);
for (idx = 0; idx < size; ++idx) {
/* write 0 or 1 */
buf[idx] = (unsigned char)(idx & 0x01);
}
fd = open(file, O_WRONLY | O_CREAT, 0644);
assert(fd >= 0);
ret = write(fd, buf, size);
fsync(fd);
close(fd);
free(buf);
assert(ret == size);
}
static int test_read(struct io_uring *ring, bool async, int blocksize)
{
int ret, fd, i;
bool done = false;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
loff_t current, expected = 0;
int count_ok;
int count_0 = 0, count_1 = 0;
unsigned char buff[QUEUE_SIZE * blocksize];
unsigned char reordered[QUEUE_SIZE * blocksize];
memset(buff, 0, QUEUE_SIZE * blocksize);
memset(reordered, 0, QUEUE_SIZE * blocksize);
create_file(".test_fpos_read", FILE_SIZE);
fd = open(".test_fpos_read", O_RDONLY);
unlink(".test_fpos_read");
assert(fd >= 0);
while (!done) {
for (i = 0; i < QUEUE_SIZE; ++i) {
sqe = io_uring_get_sqe(ring);
if (!sqe) {
fprintf(stderr, "no sqe\n");
return -1;
}
io_uring_prep_read(sqe, fd,
buff + i * blocksize,
blocksize, -1);
sqe->user_data = i;
if (async)
sqe->flags |= IOSQE_ASYNC;
if (i != QUEUE_SIZE - 1)
sqe->flags |= IOSQE_IO_LINK;
}
ret = io_uring_submit_and_wait(ring, QUEUE_SIZE);
if (ret != QUEUE_SIZE) {
fprintf(stderr, "submit failed: %d\n", ret);
return 1;
}
count_ok = 0;
for (i = 0; i < QUEUE_SIZE; ++i) {
int res;
ret = io_uring_peek_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "peek failed: %d\n", ret);
return ret;
}
assert(cqe->user_data < QUEUE_SIZE);
memcpy(reordered + count_ok,
buff + cqe->user_data * blocksize, blocksize);
res = cqe->res;
io_uring_cqe_seen(ring, cqe);
if (res == 0) {
done = true;
} else if (res == -ECANCELED) {
/* cancelled, probably ok */
} else if (res < 0 || res > blocksize) {
fprintf(stderr, "bad read: %d\n", res);
return -1;
} else {
expected += res;
count_ok += res;
}
}
ret = 0;
for (i = 0; i < count_ok; i++) {
if (reordered[i] == 1) {
count_1++;
} else if (reordered[i] == 0) {
count_0++;
} else {
fprintf(stderr, "odd read %d\n",
(int)reordered[i]);
ret = -1;
break;
}
}
if (labs(count_1 - count_0) > 1) {
fprintf(stderr, "inconsistent reads, got 0s:%d 1s:%d\n",
count_0, count_1);
ret = -1;
}
current = lseek(fd, 0, SEEK_CUR);
if (current != expected) {
fprintf(stderr, "f_pos incorrect, expected %ld have %ld\n",
(long) expected, (long) current);
ret = -1;
}
if (ret)
return ret;
}
return 0;
}
static int test_write(struct io_uring *ring, bool async, int blocksize)
{
int ret, fd, i;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
bool fail = false;
loff_t current;
char data[blocksize+1];
char readbuff[QUEUE_SIZE*blocksize+1];
fd = open(".test_fpos_write", O_RDWR | O_CREAT, 0644);
unlink(".test_fpos_write");
assert(fd >= 0);
for (i = 0; i < blocksize; i++)
data[i] = 'A' + i;
data[blocksize] = '\0';
for (i = 0; i < QUEUE_SIZE; ++i) {
sqe = io_uring_get_sqe(ring);
if (!sqe) {
fprintf(stderr, "no sqe\n");
return -1;
}
io_uring_prep_write(sqe, fd, data + (i % blocksize), 1, -1);
sqe->user_data = 1;
if (async)
sqe->flags |= IOSQE_ASYNC;
if (i != QUEUE_SIZE - 1)
sqe->flags |= IOSQE_IO_LINK;
}
ret = io_uring_submit_and_wait(ring, QUEUE_SIZE);
if (ret != QUEUE_SIZE) {
fprintf(stderr, "submit failed: %d\n", ret);
return 1;
}
for (i = 0; i < QUEUE_SIZE; ++i) {
int res;
ret = io_uring_peek_cqe(ring, &cqe);
res = cqe->res;
if (ret) {
fprintf(stderr, "peek failed: %d\n", ret);
return ret;
}
io_uring_cqe_seen(ring, cqe);
if (!fail && res != 1) {
fprintf(stderr, "bad result %d\n", res);
fail = true;
}
}
current = lseek(fd, 0, SEEK_CUR);
if (current != QUEUE_SIZE) {
fprintf(stderr, "f_pos incorrect, expected %ld have %d\n",
(long) current, QUEUE_SIZE);
fail = true;
}
current = lseek(fd, 0, SEEK_SET);
if (current != 0) {
perror("seek to start");
return -1;
}
ret = read(fd, readbuff, QUEUE_SIZE);
if (ret != QUEUE_SIZE) {
fprintf(stderr, "did not write enough: %d\n", ret);
return -1;
}
i = 0;
while (i < QUEUE_SIZE - blocksize) {
if (strncmp(readbuff + i, data, blocksize)) {
char bad[QUEUE_SIZE+1];
memcpy(bad, readbuff + i, blocksize);
bad[blocksize] = '\0';
fprintf(stderr, "unexpected data %s\n", bad);
fail = true;
}
i += blocksize;
}
return fail ? -1 : 0;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
int ret;
if (argc > 1)
return T_EXIT_SKIP;
ret = io_uring_queue_init(QUEUE_SIZE, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return T_EXIT_FAIL;
}
for (int test = 0; test < 8; test++) {
int async = test & 0x01;
int write = test & 0x02;
int blocksize = test & 0x04 ? 1 : 7;
ret = write
? test_write(&ring, !!async, blocksize)
: test_read(&ring, !!async, blocksize);
if (ret) {
fprintf(stderr, "failed %s async=%d blocksize=%d\n",
write ? "write" : "read",
async, blocksize);
return -1;
}
}
return T_EXIT_PASS;
}
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