diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_highspeed.c | 11 | ||||
| -rw-r--r-- | net/ipv4/tcp_illinois.c | 10 | ||||
| -rw-r--r-- | net/ipv4/tcp_scalable.c | 15 | ||||
| -rw-r--r-- | net/ipv4/tcp_veno.c | 10 | ||||
| -rw-r--r-- | net/ipv4/tcp_yeah.c | 10 |
5 files changed, 55 insertions, 1 deletions
diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c index db78424..6d9879e 100644 --- a/net/ipv4/tcp_highspeed.c +++ b/net/ipv4/tcp_highspeed.c @@ -94,6 +94,7 @@ static const struct hstcp_aimd_val { struct hstcp { u32 ai; + u32 loss_cwnd; }; static void hstcp_init(struct sock *sk) @@ -150,16 +151,24 @@ static void hstcp_cong_avoid(struct sock *sk, u32 ack, u32 acked) static u32 hstcp_ssthresh(struct sock *sk) { const struct tcp_sock *tp = tcp_sk(sk); - const struct hstcp *ca = inet_csk_ca(sk); + struct hstcp *ca = inet_csk_ca(sk); + ca->loss_cwnd = tp->snd_cwnd; /* Do multiplicative decrease */ return max(tp->snd_cwnd - ((tp->snd_cwnd * hstcp_aimd_vals[ca->ai].md) >> 8), 2U); } +static u32 hstcp_cwnd_undo(struct sock *sk) +{ + const struct hstcp *ca = inet_csk_ca(sk); + + return max(tcp_sk(sk)->snd_cwnd, ca->loss_cwnd); +} static struct tcp_congestion_ops tcp_highspeed __read_mostly = { .init = hstcp_init, .ssthresh = hstcp_ssthresh, + .undo_cwnd = hstcp_cwnd_undo, .cong_avoid = hstcp_cong_avoid, .owner = THIS_MODULE, diff --git a/net/ipv4/tcp_illinois.c b/net/ipv4/tcp_illinois.c index c8e6d86..60352ff 100644 --- a/net/ipv4/tcp_illinois.c +++ b/net/ipv4/tcp_illinois.c @@ -48,6 +48,7 @@ struct illinois { u32 end_seq; /* right edge of current RTT */ u32 alpha; /* Additive increase */ u32 beta; /* Muliplicative decrease */ + u32 loss_cwnd; /* cwnd on loss */ u16 acked; /* # packets acked by current ACK */ u8 rtt_above; /* average rtt has gone above threshold */ u8 rtt_low; /* # of rtts measurements below threshold */ @@ -296,10 +297,18 @@ static u32 tcp_illinois_ssthresh(struct sock *sk) struct tcp_sock *tp = tcp_sk(sk); struct illinois *ca = inet_csk_ca(sk); + ca->loss_cwnd = tp->snd_cwnd; /* Multiplicative decrease */ return max(tp->snd_cwnd - ((tp->snd_cwnd * ca->beta) >> BETA_SHIFT), 2U); } +static u32 tcp_illinois_cwnd_undo(struct sock *sk) +{ + const struct illinois *ca = inet_csk_ca(sk); + + return max(tcp_sk(sk)->snd_cwnd, ca->loss_cwnd); +} + /* Extract info for Tcp socket info provided via netlink. */ static size_t tcp_illinois_info(struct sock *sk, u32 ext, int *attr, union tcp_cc_info *info) @@ -327,6 +336,7 @@ static size_t tcp_illinois_info(struct sock *sk, u32 ext, int *attr, static struct tcp_congestion_ops tcp_illinois __read_mostly = { .init = tcp_illinois_init, .ssthresh = tcp_illinois_ssthresh, + .undo_cwnd = tcp_illinois_cwnd_undo, .cong_avoid = tcp_illinois_cong_avoid, .set_state = tcp_illinois_state, .get_info = tcp_illinois_info, diff --git a/net/ipv4/tcp_scalable.c b/net/ipv4/tcp_scalable.c index bf5ea9e..f212307 100644 --- a/net/ipv4/tcp_scalable.c +++ b/net/ipv4/tcp_scalable.c @@ -15,6 +15,10 @@ #define TCP_SCALABLE_AI_CNT 50U #define TCP_SCALABLE_MD_SCALE 3 +struct scalable { + u32 loss_cwnd; +}; + static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 acked) { struct tcp_sock *tp = tcp_sk(sk); @@ -32,12 +36,23 @@ static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 acked) static u32 tcp_scalable_ssthresh(struct sock *sk) { const struct tcp_sock *tp = tcp_sk(sk); + struct scalable *ca = inet_csk_ca(sk); + + ca->loss_cwnd = tp->snd_cwnd; return max(tp->snd_cwnd - (tp->snd_cwnd>>TCP_SCALABLE_MD_SCALE), 2U); } +static u32 tcp_scalable_cwnd_undo(struct sock *sk) +{ + const struct scalable *ca = inet_csk_ca(sk); + + return max(tcp_sk(sk)->snd_cwnd, ca->loss_cwnd); +} + static struct tcp_congestion_ops tcp_scalable __read_mostly = { .ssthresh = tcp_scalable_ssthresh, + .undo_cwnd = tcp_scalable_cwnd_undo, .cong_avoid = tcp_scalable_cong_avoid, .owner = THIS_MODULE, diff --git a/net/ipv4/tcp_veno.c b/net/ipv4/tcp_veno.c index 40171e1..76005d4 100644 --- a/net/ipv4/tcp_veno.c +++ b/net/ipv4/tcp_veno.c @@ -30,6 +30,7 @@ struct veno { u32 basertt; /* the min of all Veno rtt measurements seen (in usec) */ u32 inc; /* decide whether to increase cwnd */ u32 diff; /* calculate the diff rate */ + u32 loss_cwnd; /* cwnd when loss occured */ }; /* There are several situations when we must "re-start" Veno: @@ -193,6 +194,7 @@ static u32 tcp_veno_ssthresh(struct sock *sk) const struct tcp_sock *tp = tcp_sk(sk); struct veno *veno = inet_csk_ca(sk); + veno->loss_cwnd = tp->snd_cwnd; if (veno->diff < beta) /* in "non-congestive state", cut cwnd by 1/5 */ return max(tp->snd_cwnd * 4 / 5, 2U); @@ -201,9 +203,17 @@ static u32 tcp_veno_ssthresh(struct sock *sk) return max(tp->snd_cwnd >> 1U, 2U); } +static u32 tcp_veno_cwnd_undo(struct sock *sk) +{ + const struct veno *veno = inet_csk_ca(sk); + + return max(tcp_sk(sk)->snd_cwnd, veno->loss_cwnd); +} + static struct tcp_congestion_ops tcp_veno __read_mostly = { .init = tcp_veno_init, .ssthresh = tcp_veno_ssthresh, + .undo_cwnd = tcp_veno_cwnd_undo, .cong_avoid = tcp_veno_cong_avoid, .pkts_acked = tcp_veno_pkts_acked, .set_state = tcp_veno_state, diff --git a/net/ipv4/tcp_yeah.c b/net/ipv4/tcp_yeah.c index 9c5fc97..e6ff99c 100644 --- a/net/ipv4/tcp_yeah.c +++ b/net/ipv4/tcp_yeah.c @@ -37,6 +37,7 @@ struct yeah { u32 fast_count; u32 pkts_acked; + u32 loss_cwnd; }; static void tcp_yeah_init(struct sock *sk) @@ -219,13 +220,22 @@ static u32 tcp_yeah_ssthresh(struct sock *sk) yeah->fast_count = 0; yeah->reno_count = max(yeah->reno_count>>1, 2U); + yeah->loss_cwnd = tp->snd_cwnd; return max_t(int, tp->snd_cwnd - reduction, 2); } +static u32 tcp_yeah_cwnd_undo(struct sock *sk) +{ + const struct yeah *yeah = inet_csk_ca(sk); + + return max(tcp_sk(sk)->snd_cwnd, yeah->loss_cwnd); +} + static struct tcp_congestion_ops tcp_yeah __read_mostly = { .init = tcp_yeah_init, .ssthresh = tcp_yeah_ssthresh, + .undo_cwnd = tcp_yeah_cwnd_undo, .cong_avoid = tcp_yeah_cong_avoid, .set_state = tcp_vegas_state, .cwnd_event = tcp_vegas_cwnd_event, |
