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Hari BathiniandAlexei Starovoitov
8ebfe65e22
Test whether tail call count is incorrectly accounted for, when the tail call fails due to a missing BPF program. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com> Link: https://lore.kernel.org/r/20260216090802.1805655-1-hbathini@linux.ibm.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
34 lines
608 B
C
34 lines
608 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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struct {
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__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
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__uint(max_entries, 2);
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__uint(key_size, sizeof(__u32));
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__uint(value_size, sizeof(__u32));
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} jmp_table SEC(".maps");
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int count = 0;
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SEC("tc")
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int classifier_0(struct __sk_buff *skb)
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{
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count++;
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bpf_tail_call_static(skb, &jmp_table, 0);
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return 1;
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}
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SEC("tc")
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int entry(struct __sk_buff *skb)
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{
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/* prog == NULL case */
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bpf_tail_call_static(skb, &jmp_table, 1);
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bpf_tail_call_static(skb, &jmp_table, 0);
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return 0;
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}
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char __license[] SEC("license") = "GPL";
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