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