b8bff6f890
The tests checks how different ways of interacting with the helpers (getting retval, setting EUNATCH, EISCONN, and legacy reject returning 0 without setting retval), produce different results in both the setsockopt syscall and the retval returned by the helper. A few more tests verify the interaction between the retval of the helper and the retval in getsockopt context. Signed-off-by: YiFei Zhu <zhuyifei@google.com> Reviewed-by: Stanislav Fomichev <sdf@google.com> Link: https://lore.kernel.org/r/43ec60d679ae3f4f6fd2460559c28b63cb93cd12.1639619851.git.zhuyifei@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
46 lines
764 B
C
46 lines
764 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2021 Google LLC.
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*/
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#include <errno.h>
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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__u32 invocations = 0;
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__u32 assertion_error = 0;
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__u32 retval_value = 0;
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__u32 ctx_retval_value = 0;
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SEC("cgroup/getsockopt")
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int get_retval(struct bpf_sockopt *ctx)
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{
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retval_value = bpf_get_retval();
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ctx_retval_value = ctx->retval;
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__sync_fetch_and_add(&invocations, 1);
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return 1;
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}
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SEC("cgroup/getsockopt")
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int set_eisconn(struct bpf_sockopt *ctx)
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{
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__sync_fetch_and_add(&invocations, 1);
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if (bpf_set_retval(-EISCONN))
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assertion_error = 1;
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return 1;
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}
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SEC("cgroup/getsockopt")
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int clear_retval(struct bpf_sockopt *ctx)
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{
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__sync_fetch_and_add(&invocations, 1);
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ctx->retval = 0;
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return 1;
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}
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