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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: run various openat2(2) tests
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/uio.h>
#include "helpers.h"
#include "liburing.h"
static int test_openat2(struct io_uring *ring, const char *path, int dfd,
bool direct, int fixed_index)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct open_how how;
int ret;
sqe = io_uring_get_sqe(ring);
if (!sqe) {
fprintf(stderr, "get sqe failed\n");
return -1;
}
memset(&how, 0, sizeof(how));
how.flags = O_RDWR;
if (!direct)
io_uring_prep_openat2(sqe, dfd, path, &how);
else
io_uring_prep_openat2_direct(sqe, dfd, path, &how, fixed_index);
ret = io_uring_submit(ring);
if (ret <= 0) {
fprintf(stderr, "sqe submit failed: %d\n", ret);
return -1;
}
ret = io_uring_wait_cqe(ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait completion %d\n", ret);
return -1;
}
ret = cqe->res;
io_uring_cqe_seen(ring, cqe);
if (direct && ret > 0) {
close(ret);
return -EINVAL;
}
return ret;
}
static int test_open_fixed(const char *path, int dfd)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct io_uring ring;
const char pattern = 0xac;
char buffer[] = { 0, 0 };
int i, ret, fd = -1;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return -1;
}
ret = io_uring_register_files(&ring, &fd, 1);
if (ret) {
if (ret == -EINVAL || ret == -EBADF)
return 0;
fprintf(stderr, "%s: register ret=%d\n", __FUNCTION__, ret);
return -1;
}
ret = test_openat2(&ring, path, dfd, true, 0);
if (ret == -EINVAL) {
printf("fixed open isn't supported\n");
return 1;
} else if (ret) {
fprintf(stderr, "direct open failed %d\n", ret);
return -1;
}
sqe = io_uring_get_sqe(&ring);
io_uring_prep_write(sqe, 0, &pattern, 1, 0);
sqe->user_data = 1;
sqe->flags |= IOSQE_FIXED_FILE | IOSQE_IO_LINK;
sqe = io_uring_get_sqe(&ring);
io_uring_prep_read(sqe, 0, buffer, 1, 0);
sqe->user_data = 2;
sqe->flags |= IOSQE_FIXED_FILE;
ret = io_uring_submit(&ring);
if (ret != 2) {
fprintf(stderr, "%s: got %d, wanted 2\n", __FUNCTION__, ret);
return -1;
}
for (i = 0; i < 2; i++) {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait completion %d\n", ret);
return -1;
}
if (cqe->res != 1) {
fprintf(stderr, "unexpectetd ret %d\n", cqe->res);
return -1;
}
io_uring_cqe_seen(&ring, cqe);
}
if (memcmp(&pattern, buffer, 1) != 0) {
fprintf(stderr, "buf validation failed\n");
return -1;
}
io_uring_queue_exit(&ring);
return 0;
}
static int test_open_fixed_fail(const char *path, int dfd)
{
struct io_uring ring;
int ret, fd = -1;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return -1;
}
ret = test_openat2(&ring, path, dfd, true, 0);
if (ret != -ENXIO) {
fprintf(stderr, "install into not existing table, %i\n", ret);
return 1;
}
ret = io_uring_register_files(&ring, &fd, 1);
if (ret) {
if (ret == -EINVAL || ret == -EBADF)
return 0;
fprintf(stderr, "%s: register ret=%d\n", __FUNCTION__, ret);
return -1;
}
ret = test_openat2(&ring, path, dfd, true, 1);
if (ret != -EINVAL) {
fprintf(stderr, "install out of bounds, %i\n", ret);
return -1;
}
ret = test_openat2(&ring, path, dfd, true, (1u << 16));
if (ret != -EINVAL) {
fprintf(stderr, "install out of bounds or u16 overflow, %i\n", ret);
return -1;
}
ret = test_openat2(&ring, path, dfd, true, (1u << 16) + 1);
if (ret != -EINVAL) {
fprintf(stderr, "install out of bounds or u16 overflow, %i\n", ret);
return -1;
}
io_uring_queue_exit(&ring);
return 0;
}
static int test_direct_reinstall(const char *path, int dfd)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
char buf[1] = { 0xfa };
struct io_uring ring;
int ret, pipe_fds[2];
ssize_t ret2;
if (pipe2(pipe_fds, O_NONBLOCK)) {
fprintf(stderr, "pipe() failed\n");
return -1;
}
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return -1;
}
ret = io_uring_register_files(&ring, pipe_fds, 2);
if (ret) {
fprintf(stderr, "%s: register ret=%d\n", __FUNCTION__, ret);
return -1;
}
/* reinstall into the second slot */
ret = test_openat2(&ring, path, dfd, true, 1);
if (ret != 0) {
fprintf(stderr, "reinstall failed, %i\n", ret);
return -1;
}
/* verify it's reinstalled, first write into the slot... */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_write(sqe, 1, buf, sizeof(buf), 0);
sqe->flags |= IOSQE_FIXED_FILE;
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "sqe submit failed: %d\n", ret);
return -1;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait completion %d\n", ret);
return ret;
}
ret = cqe->res;
io_uring_cqe_seen(&ring, cqe);
if (ret != 1) {
fprintf(stderr, "invalid write %i\n", ret);
return -1;
}
/* ... and make sure nothing has been written to the pipe */
ret2 = read(pipe_fds[0], buf, 1);
if (ret2 != 0 && !(ret2 < 0 && errno == EAGAIN)) {
fprintf(stderr, "invalid pipe read, %d %d\n", errno, (int)ret2);
return -1;
}
close(pipe_fds[0]);
close(pipe_fds[1]);
io_uring_queue_exit(&ring);
return 0;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
const char *path, *path_rel;
int ret, do_unlink;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return 1;
}
if (argc > 1) {
path = "/tmp/.open.at2";
path_rel = argv[1];
do_unlink = 0;
} else {
path = "/tmp/.open.at2";
path_rel = ".open.at2";
do_unlink = 1;
}
t_create_file(path, 4096);
if (do_unlink)
t_create_file(path_rel, 4096);
ret = test_openat2(&ring, path, -1, false, 0);
if (ret < 0) {
if (ret == -EINVAL) {
fprintf(stdout, "openat2 not supported, skipping\n");
goto done;
}
fprintf(stderr, "test_openat2 absolute failed: %d\n", ret);
goto err;
}
ret = test_openat2(&ring, path_rel, AT_FDCWD, false, 0);
if (ret < 0) {
fprintf(stderr, "test_openat2 relative failed: %d\n", ret);
goto err;
}
ret = test_open_fixed(path, -1);
if (ret > 0)
goto done;
if (ret) {
fprintf(stderr, "test_open_fixed failed\n");
goto err;
}
ret = test_open_fixed_fail(path, -1);
if (ret) {
fprintf(stderr, "test_open_fixed_fail failed\n");
goto err;
}
ret = test_direct_reinstall(path, -1);
if (ret) {
fprintf(stderr, "test_direct_reinstall failed\n");
goto err;
}
done:
unlink(path);
if (do_unlink)
unlink(path_rel);
return 0;
err:
unlink(path);
if (do_unlink)
unlink(path_rel);
return 1;
}
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