diff options
| author |   Eric Dumazet <edumazet@google.com> | 2022-04-15 17:10:44 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-04-17 13:31:31 +0100 |
| commit | 4b506af9c5b8de0da34097d50d9448dfb33d70c3 (patch) | |
| tree | 85bf443d86dfce9485a99b41cb1ea5b96173d228 /net/ipv4/tcp_input.c | |
| parent | tcp: add drop reasons to tcp_rcv_state_process() (diff) | |
| download | linux-dev-4b506af9c5b8de0da34097d50d9448dfb33d70c3.tar.xz linux-dev-4b506af9c5b8de0da34097d50d9448dfb33d70c3.zip | |
tcp: add two drop reasons for tcp_ack()
Add TCP_TOO_OLD_ACK and TCP_ACK_UNSENT_DATA drop
reasons so that tcp_rcv_established() can report
them.
Signed-off-by: Eric Dumazet <edumazet@google.com>
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 | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 85fae79c894d..8a68785b0405 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3766,7 +3766,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) if (before(ack, prior_snd_una - tp->max_window)) { if (!(flag & FLAG_NO_CHALLENGE_ACK)) tcp_send_challenge_ack(sk); - return -1; + return -SKB_DROP_REASON_TCP_TOO_OLD_ACK; } goto old_ack; } @@ -3775,7 +3775,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) * this segment (RFC793 Section 3.9). */ if (after(ack, tp->snd_nxt)) - return -1; + return -SKB_DROP_REASON_TCP_ACK_UNSENT_DATA; if (after(ack, prior_snd_una)) { flag |= FLAG_SND_UNA_ADVANCED; @@ -5962,7 +5962,8 @@ slow_path: return; step5: - if (tcp_ack(sk, skb, FLAG_SLOWPATH | FLAG_UPDATE_TS_RECENT) < 0) + reason = tcp_ack(sk, skb, FLAG_SLOWPATH | FLAG_UPDATE_TS_RECENT); + if (reason < 0) goto discard; tcp_rcv_rtt_measure_ts(sk, skb); |