mirror of https://github.com/torvalds/linux.git
79 lines
1.1 KiB
C
79 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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__noinline
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long changes_pkt_data(struct __sk_buff *sk)
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{
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return bpf_skb_pull_data(sk, 0);
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}
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__noinline __weak
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long does_not_change_pkt_data(struct __sk_buff *sk)
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{
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return 0;
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}
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SEC("?tc")
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int main_changes_with_subprogs(struct __sk_buff *sk)
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{
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changes_pkt_data(sk);
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does_not_change_pkt_data(sk);
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return 0;
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}
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SEC("?tc")
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int main_changes(struct __sk_buff *sk)
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{
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bpf_skb_pull_data(sk, 0);
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return 0;
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}
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SEC("?tc")
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int main_does_not_change(struct __sk_buff *sk)
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{
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return 0;
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}
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__noinline
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long might_sleep(struct pt_regs *ctx __arg_ctx)
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{
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int i;
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bpf_copy_from_user(&i, sizeof(i), NULL);
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return i;
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}
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__noinline __weak
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long does_not_sleep(struct pt_regs *ctx __arg_ctx)
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{
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return 0;
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}
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SEC("?uprobe.s")
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int main_might_sleep_with_subprogs(struct pt_regs *ctx)
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{
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might_sleep(ctx);
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does_not_sleep(ctx);
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return 0;
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}
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SEC("?uprobe.s")
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int main_might_sleep(struct pt_regs *ctx)
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{
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int i;
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bpf_copy_from_user(&i, sizeof(i), NULL);
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return i;
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}
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SEC("?uprobe.s")
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int main_does_not_sleep(struct pt_regs *ctx)
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{
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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