8e9af82171
Move all kfunc exports into separate bpf_testmod_kfunc.h header file and include it in tests that need it. We will move all test kfuncs into bpf_testmod in following change, so it's convenient to have declarations in single place. The bpf_testmod_kfunc.h is included by both bpf_testmod and bpf programs that use test kfuncs. As suggested by David, the bpf_testmod_kfunc.h includes vmlinux.h and bpf/bpf_helpers.h for bpf programs build, so the declarations have proper __ksym attribute and we can resolve all the structs. Note in kfunc_call_test_subprog.c we can no longer use the sk_state define from bpf_tcp_helpers.h (because it clashed with vmlinux.h) and we need to address __sk_common.skc_state field directly. Acked-by: David Vernet <void@manifault.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20230515133756.1658301-3-jolsa@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
38 lines
759 B
C
38 lines
759 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2021 Facebook */
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#include "../bpf_testmod/bpf_testmod_kfunc.h"
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extern const int bpf_prog_active __ksym;
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int active_res = -1;
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int sk_state_res = -1;
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int __noinline f1(struct __sk_buff *skb)
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{
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struct bpf_sock *sk = skb->sk;
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int *active;
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if (!sk)
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return -1;
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sk = bpf_sk_fullsock(sk);
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if (!sk)
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return -1;
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active = (int *)bpf_per_cpu_ptr(&bpf_prog_active,
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bpf_get_smp_processor_id());
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if (active)
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active_res = *active;
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sk_state_res = bpf_kfunc_call_test3((struct sock *)sk)->__sk_common.skc_state;
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return (__u32)bpf_kfunc_call_test1((struct sock *)sk, 1, 2, 3, 4);
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}
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SEC("tc")
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int kfunc_call_test1(struct __sk_buff *skb)
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{
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return f1(skb);
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}
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char _license[] SEC("license") = "GPL";
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