8ba218e625
Add a few more tests in sockmap_basic.c and sockmap_listen.c to test bpf_link based APIs for SK_MSG and SK_SKB programs. Link attach/detach/update are all tested. All tests are passed. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Reviewed-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20240410043547.3738448-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2020 Isovalent, Inc.
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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struct {
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__uint(type, BPF_MAP_TYPE_SOCKMAP);
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__uint(max_entries, 2);
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__type(key, __u32);
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__type(value, __u64);
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} sock_map SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_SOCKHASH);
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__uint(max_entries, 2);
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__type(key, __u32);
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__type(value, __u64);
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} sock_hash SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_SK_STORAGE);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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__type(key, __u32);
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__type(value, __u64);
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} socket_storage SEC(".maps");
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static int prog_msg_verdict_common(struct sk_msg_md *msg)
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{
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struct task_struct *task = (struct task_struct *)bpf_get_current_task();
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int verdict = SK_PASS;
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__u32 pid, tpid;
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__u64 *sk_stg;
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pid = bpf_get_current_pid_tgid() >> 32;
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sk_stg = bpf_sk_storage_get(&socket_storage, msg->sk, 0, BPF_SK_STORAGE_GET_F_CREATE);
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if (!sk_stg)
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return SK_DROP;
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*sk_stg = pid;
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bpf_probe_read_kernel(&tpid , sizeof(tpid), &task->tgid);
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if (pid != tpid)
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verdict = SK_DROP;
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bpf_sk_storage_delete(&socket_storage, (void *)msg->sk);
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return verdict;
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}
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SEC("sk_msg")
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int prog_msg_verdict(struct sk_msg_md *msg)
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{
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return prog_msg_verdict_common(msg);
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}
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SEC("sk_msg")
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int prog_msg_verdict_clone(struct sk_msg_md *msg)
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{
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return prog_msg_verdict_common(msg);
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}
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SEC("sk_msg")
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int prog_msg_verdict_clone2(struct sk_msg_md *msg)
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{
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return prog_msg_verdict_common(msg);
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}
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SEC("sk_skb/stream_verdict")
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int prog_skb_verdict(struct __sk_buff *skb)
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{
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return SK_PASS;
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}
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char _license[] SEC("license") = "GPL";
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