diff options
| author | Menglong Dong <imagedong@tencent.com> | 2022-02-20 15:06:35 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-02-20 13:55:31 +0000 |
| commit | 2a968ef60e1fac4e694d9f60ce19a3b66b40e8c3 (patch) | |
| tree | 67a6462d44dd2a9700b20c4cf835a6ad6e32351a /net/ipv4/tcp_input.c | |
| parent | 8eba65fa5f06519042b98564089b942d795e3f8d (diff) | |
| download | linux-2a968ef60e1fac4e694d9f60ce19a3b66b40e8c3.tar.bz2 | |
net: tcp: use tcp_drop_reason() for tcp_rcv_established()
Replace tcp_drop() used in tcp_rcv_established() with tcp_drop_reason().
Following drop reasons are added:
SKB_DROP_REASON_TCP_FLAGS
Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 0f41fdfd8c27..2d8495a62bc4 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -5787,6 +5787,7 @@ discard: */ void tcp_rcv_established(struct sock *sk, struct sk_buff *skb) { + enum skb_drop_reason reason = SKB_DROP_REASON_NOT_SPECIFIED; const struct tcphdr *th = (const struct tcphdr *)skb->data; struct tcp_sock *tp = tcp_sk(sk); unsigned int len = skb->len; @@ -5875,6 +5876,7 @@ void tcp_rcv_established(struct sock *sk, struct sk_buff *skb) tp->rcv_rtt_last_tsecr = tp->rx_opt.rcv_tsecr; return; } else { /* Header too small */ + reason = SKB_DROP_REASON_PKT_TOO_SMALL; TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS); goto discard; } @@ -5930,8 +5932,10 @@ slow_path: if (len < (th->doff << 2) || tcp_checksum_complete(skb)) goto csum_error; - if (!th->ack && !th->rst && !th->syn) + if (!th->ack && !th->rst && !th->syn) { + reason = SKB_DROP_REASON_TCP_FLAGS; goto discard; + } /* * Standard slow path. @@ -5957,12 +5961,13 @@ step5: return; csum_error: + reason = SKB_DROP_REASON_TCP_CSUM; trace_tcp_bad_csum(skb); TCP_INC_STATS(sock_net(sk), TCP_MIB_CSUMERRORS); TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS); discard: - tcp_drop(sk, skb); + tcp_drop_reason(sk, skb, reason); } EXPORT_SYMBOL(tcp_rcv_established); |