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/* SPDX-License-Identifier: MIT */
/*
* Description: run various fixed file fd passing tests
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "liburing.h"
#include "helpers.h"
#define FSIZE 128
#define PAT 0x9a
static int no_fd_pass;
static int verify_fixed_read(struct io_uring *ring, int fixed_fd, int fail)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
unsigned char buf[FSIZE];
int i;
sqe = io_uring_get_sqe(ring);
io_uring_prep_read(sqe, fixed_fd, buf, FSIZE, 0);
sqe->flags |= IOSQE_FIXED_FILE;
io_uring_submit(ring);
io_uring_wait_cqe(ring, &cqe);
if (cqe->res != FSIZE) {
if (fail && cqe->res == -EBADF)
return 0;
fprintf(stderr, "Read: %d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(ring, cqe);
for (i = 0; i < FSIZE; i++) {
if (buf[i] != PAT) {
fprintf(stderr, "got %x, wanted %x\n", buf[i], PAT);
return 1;
}
}
return 0;
}
static int test(const char *filename)
{
struct io_uring sring, dring;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int ret;
ret = io_uring_queue_init(8, &sring, 0);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return T_EXIT_FAIL;
}
ret = io_uring_queue_init(8, &dring, 0);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return T_EXIT_FAIL;
}
ret = io_uring_register_files_sparse(&sring, 8);
if (ret) {
if (ret == -EINVAL)
return T_EXIT_SKIP;
fprintf(stderr, "register files failed %d\n", ret);
return T_EXIT_FAIL;
}
ret = io_uring_register_files_sparse(&dring, 8);
if (ret) {
fprintf(stderr, "register files failed %d\n", ret);
return T_EXIT_FAIL;
}
/* open direct descriptor */
sqe = io_uring_get_sqe(&sring);
io_uring_prep_openat_direct(sqe, AT_FDCWD, filename, 0, 0644, 0);
io_uring_submit(&sring);
ret = io_uring_wait_cqe(&sring, &cqe);
if (ret) {
fprintf(stderr, "wait cqe failed %d\n", ret);
return T_EXIT_FAIL;
}
if (cqe->res) {
fprintf(stderr, "cqe res %d\n", cqe->res);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(&sring, cqe);
/* verify data is sane for source ring */
if (verify_fixed_read(&sring, 0, 0))
return T_EXIT_FAIL;
/* send direct descriptor to destination ring */
sqe = io_uring_get_sqe(&sring);
io_uring_prep_msg_ring(sqe, dring.ring_fd, 0, 0x89, 0);
sqe->addr = 1;
sqe->addr3 = 0;
sqe->file_index = 1;
io_uring_submit(&sring);
ret = io_uring_wait_cqe(&sring, &cqe);
if (ret) {
fprintf(stderr, "wait cqe failed %d\n", ret);
return T_EXIT_FAIL;
}
if (cqe->res) {
if (cqe->res == -EINVAL && !no_fd_pass) {
no_fd_pass = 1;
return T_EXIT_SKIP;
}
fprintf(stderr, "msg_ring failed %d\n", cqe->res);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(&sring, cqe);
/* get posted completion for the passing */
ret = io_uring_wait_cqe(&dring, &cqe);
if (ret) {
fprintf(stderr, "wait cqe failed %d\n", ret);
return T_EXIT_FAIL;
}
if (cqe->user_data != 0x89) {
fprintf(stderr, "bad user_data %ld\n", (long) cqe->res);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(&dring, cqe);
/* now verify we can read the sane data from the destination ring */
if (verify_fixed_read(&dring, 0, 0))
return T_EXIT_FAIL;
/* close descriptor in source ring */
sqe = io_uring_get_sqe(&sring);
io_uring_prep_close_direct(sqe, 0);
io_uring_submit(&sring);
ret = io_uring_wait_cqe(&sring, &cqe);
if (ret) {
fprintf(stderr, "wait cqe failed %d\n", ret);
return T_EXIT_FAIL;
}
if (cqe->res) {
fprintf(stderr, "direct close failed %d\n", cqe->res);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(&sring, cqe);
/* check that source ring fails after close */
if (verify_fixed_read(&sring, 0, 1))
return T_EXIT_FAIL;
/* check we can still read from destination ring */
if (verify_fixed_read(&dring, 0, 0))
return T_EXIT_FAIL;
return T_EXIT_PASS;
}
int main(int argc, char *argv[])
{
char fname[80];
int ret;
if (argc > 1)
return T_EXIT_SKIP;
sprintf(fname, ".fd-pass.%d", getpid());
t_create_file_pattern(fname, FSIZE, PAT);
ret = test(fname);
if (ret == T_EXIT_FAIL) {
fprintf(stderr, "test failed\n");
ret = T_EXIT_FAIL;
}
unlink(fname);
return ret;
}
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