diff options
Diffstat (limited to 'net/mptcp/options.c')
| -rw-r--r-- | net/mptcp/options.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index a044dd43411d..f2d1e27a2bc1 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -492,7 +492,7 @@ static bool mptcp_established_options_dss(struct sock *sk, struct sk_buff *skb, bool ret = false; mpext = skb ? mptcp_get_ext(skb) : NULL; - snd_data_fin_enable = READ_ONCE(msk->snd_data_fin_enable); + snd_data_fin_enable = mptcp_data_fin_enabled(msk); if (!skb || (mpext && mpext->use_map) || snd_data_fin_enable) { unsigned int map_size; @@ -809,11 +809,14 @@ static u64 expand_ack(u64 old_ack, u64 cur_ack, bool use_64bit) return cur_ack; } -static void update_una(struct mptcp_sock *msk, - struct mptcp_options_received *mp_opt) +static void ack_update_msk(struct mptcp_sock *msk, + const struct sock *ssk, + struct mptcp_options_received *mp_opt) { u64 new_snd_una, snd_una, old_snd_una = atomic64_read(&msk->snd_una); - u64 write_seq = READ_ONCE(msk->write_seq); + u64 new_wnd_end, wnd_end, old_wnd_end = atomic64_read(&msk->wnd_end); + u64 snd_nxt = READ_ONCE(msk->snd_nxt); + struct sock *sk = (struct sock *)msk; /* avoid ack expansion on update conflict, to reduce the risk of * wrongly expanding to a future ack sequence number, which is way @@ -822,15 +825,28 @@ static void update_una(struct mptcp_sock *msk, new_snd_una = expand_ack(old_snd_una, mp_opt->data_ack, mp_opt->ack64); /* ACK for data not even sent yet? Ignore. */ - if (after64(new_snd_una, write_seq)) + if (after64(new_snd_una, snd_nxt)) new_snd_una = old_snd_una; + new_wnd_end = new_snd_una + tcp_sk(ssk)->snd_wnd; + + while (after64(new_wnd_end, old_wnd_end)) { + wnd_end = old_wnd_end; + old_wnd_end = atomic64_cmpxchg(&msk->wnd_end, wnd_end, + new_wnd_end); + if (old_wnd_end == wnd_end) { + if (mptcp_send_head(sk)) + mptcp_schedule_work(sk); + break; + } + } + while (after64(new_snd_una, old_snd_una)) { snd_una = old_snd_una; old_snd_una = atomic64_cmpxchg(&msk->snd_una, snd_una, new_snd_una); if (old_snd_una == snd_una) { - mptcp_data_acked((struct sock *)msk); + mptcp_data_acked(sk); break; } } @@ -930,7 +946,7 @@ void mptcp_incoming_options(struct sock *sk, struct sk_buff *skb) * monodirectional flows will stuck */ if (mp_opt.use_ack) - update_una(msk, &mp_opt); + ack_update_msk(msk, sk, &mp_opt); /* Zero-data-length packets are dropped by the caller and not * propagated to the MPTCP layer, so the skb extension does not |