c1ff181ffa
Use the prog_test kfuncs to test the referenced PTR_TO_BTF_ID kfunc support, and PTR_TO_CTX, PTR_TO_MEM argument passing support. Also testing the various failure cases for invalid kfunc prototypes. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20220114163953.1455836-10-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2021 Facebook */
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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extern int bpf_kfunc_call_test2(struct sock *sk, __u32 a, __u32 b) __ksym;
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extern __u64 bpf_kfunc_call_test1(struct sock *sk, __u32 a, __u64 b,
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__u32 c, __u64 d) __ksym;
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extern struct prog_test_ref_kfunc *bpf_kfunc_call_test_acquire(unsigned long *sp) __ksym;
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extern void bpf_kfunc_call_test_release(struct prog_test_ref_kfunc *p) __ksym;
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extern void bpf_kfunc_call_test_pass_ctx(struct __sk_buff *skb) __ksym;
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extern void bpf_kfunc_call_test_pass1(struct prog_test_pass1 *p) __ksym;
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extern void bpf_kfunc_call_test_pass2(struct prog_test_pass2 *p) __ksym;
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extern void bpf_kfunc_call_test_mem_len_pass1(void *mem, int len) __ksym;
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extern void bpf_kfunc_call_test_mem_len_fail2(__u64 *mem, int len) __ksym;
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SEC("tc")
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int kfunc_call_test2(struct __sk_buff *skb)
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{
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struct bpf_sock *sk = skb->sk;
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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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return bpf_kfunc_call_test2((struct sock *)sk, 1, 2);
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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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struct bpf_sock *sk = skb->sk;
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__u64 a = 1ULL << 32;
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__u32 ret;
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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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a = bpf_kfunc_call_test1((struct sock *)sk, 1, a | 2, 3, a | 4);
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ret = a >> 32; /* ret should be 2 */
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ret += (__u32)a; /* ret should be 12 */
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return ret;
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}
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SEC("tc")
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int kfunc_call_test_ref_btf_id(struct __sk_buff *skb)
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{
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struct prog_test_ref_kfunc *pt;
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unsigned long s = 0;
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int ret = 0;
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pt = bpf_kfunc_call_test_acquire(&s);
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if (pt) {
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if (pt->a != 42 || pt->b != 108)
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ret = -1;
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bpf_kfunc_call_test_release(pt);
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}
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return ret;
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}
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SEC("tc")
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int kfunc_call_test_pass(struct __sk_buff *skb)
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{
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struct prog_test_pass1 p1 = {};
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struct prog_test_pass2 p2 = {};
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short a = 0;
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__u64 b = 0;
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long c = 0;
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char d = 0;
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int e = 0;
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bpf_kfunc_call_test_pass_ctx(skb);
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bpf_kfunc_call_test_pass1(&p1);
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bpf_kfunc_call_test_pass2(&p2);
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bpf_kfunc_call_test_mem_len_pass1(&a, sizeof(a));
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bpf_kfunc_call_test_mem_len_pass1(&b, sizeof(b));
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bpf_kfunc_call_test_mem_len_pass1(&c, sizeof(c));
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bpf_kfunc_call_test_mem_len_pass1(&d, sizeof(d));
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bpf_kfunc_call_test_mem_len_pass1(&e, sizeof(e));
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bpf_kfunc_call_test_mem_len_fail2(&b, -1);
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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