mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2025-01-27 00:04:47 +08:00
36b5d47113
Split off few legacy things from bpf_helpers.h into separate
bpf_legacy.h file:
- load_{byte|half|word};
- remove extra inner_idx and numa_node fields from bpf_map_def and
introduce bpf_map_def_legacy for use in samples;
- move BPF_ANNOTATE_KV_PAIR into bpf_legacy.h.
Adjust samples and selftests accordingly by either including
bpf_legacy.h and using bpf_map_def_legacy, or switching to BTF-defined
maps altogether.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20191008175942.1769476-3-andriin@fb.com
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/bpf.h>
|
|
#include "bpf_helpers.h"
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
__u32 _version SEC("version") = 1;
|
|
|
|
struct tcp_rtt_storage {
|
|
__u32 invoked;
|
|
__u32 dsack_dups;
|
|
__u32 delivered;
|
|
__u32 delivered_ce;
|
|
__u32 icsk_retransmits;
|
|
};
|
|
|
|
struct {
|
|
__uint(type, BPF_MAP_TYPE_SK_STORAGE);
|
|
__uint(map_flags, BPF_F_NO_PREALLOC);
|
|
__type(key, int);
|
|
__type(value, struct tcp_rtt_storage);
|
|
} socket_storage_map SEC(".maps");
|
|
|
|
SEC("sockops")
|
|
int _sockops(struct bpf_sock_ops *ctx)
|
|
{
|
|
struct tcp_rtt_storage *storage;
|
|
struct bpf_tcp_sock *tcp_sk;
|
|
int op = (int) ctx->op;
|
|
struct bpf_sock *sk;
|
|
|
|
sk = ctx->sk;
|
|
if (!sk)
|
|
return 1;
|
|
|
|
storage = bpf_sk_storage_get(&socket_storage_map, sk, 0,
|
|
BPF_SK_STORAGE_GET_F_CREATE);
|
|
if (!storage)
|
|
return 1;
|
|
|
|
if (op == BPF_SOCK_OPS_TCP_CONNECT_CB) {
|
|
bpf_sock_ops_cb_flags_set(ctx, BPF_SOCK_OPS_RTT_CB_FLAG);
|
|
return 1;
|
|
}
|
|
|
|
if (op != BPF_SOCK_OPS_RTT_CB)
|
|
return 1;
|
|
|
|
tcp_sk = bpf_tcp_sock(sk);
|
|
if (!tcp_sk)
|
|
return 1;
|
|
|
|
storage->invoked++;
|
|
|
|
storage->dsack_dups = tcp_sk->dsack_dups;
|
|
storage->delivered = tcp_sk->delivered;
|
|
storage->delivered_ce = tcp_sk->delivered_ce;
|
|
storage->icsk_retransmits = tcp_sk->icsk_retransmits;
|
|
|
|
return 1;
|
|
}
|