fa7f17d066
Add a writable bare tracepoint in bpf_testmod module, and trigger its calling when reading /sys/kernel/bpf_testmod with a specific buffer length. The reading will return the value in writable context if the early return flag is enabled in writable context. Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211004094857.30868-4-hotforest@gmail.com
25 lines
399 B
C
25 lines
399 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2020 Facebook */
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#ifndef _BPF_TESTMOD_H
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#define _BPF_TESTMOD_H
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#include <linux/types.h>
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struct bpf_testmod_test_read_ctx {
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char *buf;
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loff_t off;
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size_t len;
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};
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struct bpf_testmod_test_write_ctx {
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char *buf;
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loff_t off;
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size_t len;
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};
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struct bpf_testmod_test_writable_ctx {
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bool early_ret;
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int val;
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};
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#endif /* _BPF_TESTMOD_H */
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