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/* SPDX-License-Identifier: MIT */
/*
* Description: test various offset of fixed buffer read
*
*/
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include "liburing.h"
#include "helpers.h"
static struct iovec rvec, wvec;
static int read_it(struct io_uring *ring, int fd, int len, int off)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int ret;
sqe = io_uring_get_sqe(ring);
io_uring_prep_read_fixed(sqe, fd, rvec.iov_base + off, len, 0, 0);
sqe->user_data = 1;
io_uring_submit(ring);
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "wait %d\n", ret);
return 1;
}
if (cqe->res < 0) {
fprintf(stderr, "cqe res %s\n", strerror(-cqe->res));
return 1;
}
if (cqe->res != len) {
fprintf(stderr, "Bad read amount: %d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(ring, cqe);
if (memcmp(wvec.iov_base, rvec.iov_base + off, len)) {
fprintf(stderr, "%d %d verify failed\n", len, off);
return 1;
}
return 0;
}
static int test(struct io_uring *ring, int fd, int vec_off)
{
struct iovec v = rvec;
int ret;
v.iov_base += vec_off;
v.iov_len -= vec_off;
ret = io_uring_register_buffers(ring, &v, 1);
if (ret) {
fprintf(stderr, "Vec register: %d\n", ret);
return T_EXIT_FAIL;
}
ret = read_it(ring, fd, 4096, vec_off);
if (ret) {
fprintf(stderr, "4096 0 failed\n");
return T_EXIT_FAIL;
}
ret = read_it(ring, fd, 8192, 4096);
if (ret) {
fprintf(stderr, "8192 4096 failed\n");
return T_EXIT_FAIL;
}
ret = read_it(ring, fd, 4096, 4096);
if (ret) {
fprintf(stderr, "4096 4096 failed\n");
return T_EXIT_FAIL;
}
io_uring_unregister_buffers(ring);
return T_EXIT_PASS;
}
static int is_bdev(int fd)
{
struct stat sb;
if (fstat(fd, &sb) < 0) {
perror("fstat");
return -1;
}
return S_ISBLK(sb.st_mode);
}
int main(int argc, char *argv[])
{
struct io_uring ring;
const char *fname;
char buf[256];
int fd, rnd_fd, ret, bs = 512;
if (argc > 1) {
fname = argv[1];
} else {
srand((unsigned)time(NULL));
snprintf(buf, sizeof(buf), ".fixed-seg-%u-%u", (unsigned) rand(),
(unsigned)getpid());
fname = buf;
t_create_file(fname, 128*1024);
}
fd = open(fname, O_RDWR | O_DIRECT | O_EXCL);
if (fd < 0) {
perror("open");
return 1;
}
ret = is_bdev(fd);
if (fd < 0)
return 1;
if (ret && ioctl(fd, BLKSSZGET, &bs) < 0) {
perror("ioctl BLKSSZGET,");
return 1;
}
rnd_fd = open("/dev/urandom", O_RDONLY);
if (fd < 0) {
perror("urandom: open");
goto err;
}
if (posix_memalign(&wvec.iov_base, 4096, 512*1024))
goto err;
wvec.iov_len = 512*1024;
ret = read(rnd_fd, wvec.iov_base, wvec.iov_len);
if (ret != wvec.iov_len) {
fprintf(stderr, "Precondition, urandom read failed, ret: %d\n", ret);
goto err;
}
ret = write(fd, wvec.iov_base, wvec.iov_len);
if (ret != wvec.iov_len) {
fprintf(stderr, "Precondition, write failed, ret: %d\n", ret);
goto err;
}
if (posix_memalign(&rvec.iov_base, 4096, 512*1024))
goto err;
rvec.iov_len = 512*1024;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "queue_init: %d\n", ret);
goto err;
}
ret = test(&ring, fd, 0);
if (ret) {
fprintf(stderr, "test 0 failed\n");
goto err;
}
ret = test(&ring, fd, bs);
if (ret) {
fprintf(stderr, "test %d failed\n", bs);
goto err;
}
if ((bs == 512) && test(&ring, fd, 3584)) {
fprintf(stderr, "test 3584 failed\n");
goto err;
}
close(fd);
io_uring_queue_exit(&ring);
if (fname != argv[1])
unlink(fname);
return T_EXIT_PASS;
err:
if (fname != argv[1])
unlink(fname);
return T_EXIT_FAIL;
}
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