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// SPDX-License-Identifier: GPL-2.0
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <test_progs.h>
#include "test_pinning_devmap.skel.h"
void test_pinning_devmap_reuse(void)
{
const char *pinpath1 = "/sys/fs/bpf/pinmap1";
const char *pinpath2 = "/sys/fs/bpf/pinmap2";
struct test_pinning_devmap *skel1 = NULL, *skel2 = NULL;
int err;
DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts);
/* load the object a first time */
skel1 = test_pinning_devmap__open_and_load();
if (!ASSERT_OK_PTR(skel1, "skel_load1"))
goto out;
/* load the object a second time, re-using the pinned map */
skel2 = test_pinning_devmap__open_and_load();
if (!ASSERT_OK_PTR(skel2, "skel_load2"))
goto out;
/* we can close the reference safely without
* the map's refcount falling to 0
*/
test_pinning_devmap__destroy(skel1);
skel1 = NULL;
/* now, swap the pins */
err = renameat2(0, pinpath1, 0, pinpath2, RENAME_EXCHANGE);
if (!ASSERT_OK(err, "swap pins"))
goto out;
/* load the object again, this time the re-use should fail */
skel1 = test_pinning_devmap__open_and_load();
if (!ASSERT_ERR_PTR(skel1, "skel_load3"))
goto out;
out:
unlink(pinpath1);
unlink(pinpath2);
test_pinning_devmap__destroy(skel1);
test_pinning_devmap__destroy(skel2);
}
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