1e38abefcf
Add new selftest checking attachment of fentry/fexit/fmod_ret (and raw tracepoint ones for completeness) BPF programs to kernel module function. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20201203204634.1325171-15-andrii@kernel.org
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include <test_progs.h>
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#include "test_module_attach.skel.h"
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static int duration;
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static int trigger_module_test_read(int read_sz)
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{
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int fd, err;
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fd = open("/sys/kernel/bpf_testmod", O_RDONLY);
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err = -errno;
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if (CHECK(fd < 0, "testmod_file_open", "failed: %d\n", err))
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return err;
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read(fd, NULL, read_sz);
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close(fd);
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return 0;
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}
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void test_module_attach(void)
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{
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const int READ_SZ = 456;
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struct test_module_attach* skel;
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struct test_module_attach__bss *bss;
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int err;
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skel = test_module_attach__open_and_load();
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if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
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return;
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bss = skel->bss;
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err = test_module_attach__attach(skel);
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if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
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goto cleanup;
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/* trigger tracepoint */
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ASSERT_OK(trigger_module_test_read(READ_SZ), "trigger_read");
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ASSERT_EQ(bss->raw_tp_read_sz, READ_SZ, "raw_tp");
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ASSERT_EQ(bss->tp_btf_read_sz, READ_SZ, "tp_btf");
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ASSERT_EQ(bss->fentry_read_sz, READ_SZ, "fentry");
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ASSERT_EQ(bss->fexit_read_sz, READ_SZ, "fexit");
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ASSERT_EQ(bss->fexit_ret, -EIO, "fexit_tet");
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ASSERT_EQ(bss->fmod_ret_read_sz, READ_SZ, "fmod_ret");
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cleanup:
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test_module_attach__destroy(skel);
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}
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