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Date: Mon, 3 Mar 2008 15:01:43 -0300
From: "Leandro Sales" <leandroal@...il.com>
To: "Gerrit Renker" <gerrit@....abdn.ac.uk>, Arnaldo <acme@...hat.com>,
dccp@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [DCCP] [RFC]: Getting rid of unwieldy struct prefixes
On Fri, Feb 29, 2008 at 6:45 AM, Gerrit Renker <gerrit@....abdn.ac.uk> wrote:
> [CCID-2]: Get rid of ccid2hc{tx,rx}_ prefixes
>
> Following discussion with Leandro yesterday, this is a request-for-comments
> patch to fix two problems caused by the ubiquitous long "hctx->ccid2htx_" and
> "hcrx->ccid2hcrx_" prefixes:
> -> code becomes hard to read;
> -> multiple-line statements are almost inevitable even for simple expressions;
> -> the prefixes are not really necessary - compare with "struct tcp_sock".
>
> There had been previous discussion of this on dccp@...r, but this was not
> followed up (most people agreed that the prefixes are too long).
>
> If this format is acceptable, I will put it into the tree. Suggestions are
> welcome and asked for since the same problem crops up in two other CCIDs; i.e.
> this change needs to be done consistently to keep the interface clear.
>
> Signed-off-by: Gerrit Renker <gerrit@....abdn.ac.uk>
> ---
> net/dccp/ccids/ccid2.c | 283 ++++++++++++++++++++++++-------------------------
> net/dccp/ccids/ccid2.h | 66 +++++------
> 2 files changed, 175 insertions(+), 174 deletions(-)
>
> --- a/net/dccp/ccids/ccid2.h
> +++ b/net/dccp/ccids/ccid2.h
> @@ -40,49 +40,49 @@ struct ccid2_seq {
>
> /** struct ccid2_hc_tx_sock - CCID2 TX half connection
> *
> - * @ccid2hctx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5
> - * @ccid2hctx_packets_acked: Ack counter for deriving cwnd growth (RFC 3465)
> - * @ccid2hctx_srtt: smoothed RTT estimate, scaled by 2^3
> - * @ccid2hctx_mdev: smoothed RTT variation, scaled by 2^2
> - * @ccid2hctx_mdev_max: maximum of @mdev during one flight
> - * @ccid2hctx_rttvar: moving average/maximum of @mdev_max
> - * @ccid2hctx_rto: RTO value deriving from SRTT and RTTVAR (RFC 2988)
> - * @ccid2hctx_rtt_seq: to decay RTTVAR at most once per flight
> - * @ccid2hctx_rpseq - last consecutive seqno
> - * @ccid2hctx_rpdupack - dupacks since rpseq
> - * @ccid2hctx_av_chunks: list of Ack Vectors received on current skb
> + * @{cwnd,ssthresh,pipe}: as per RFC 4341, section 5
> + * @packets_acked: Ack counter for deriving cwnd growth (RFC 3465)
> + * @srtt: smoothed RTT estimate, scaled by 2^3
> + * @mdev: smoothed RTT variation, scaled by 2^2
> + * @mdev_max: maximum of @mdev during one flight
> + * @rttvar: moving average/maximum of @mdev_max
> + * @rto: RTO value deriving from SRTT and RTTVAR (RFC 2988)
> + * @rtt_seq: to decay RTTVAR at most once per flight
> + * @rpseq - last consecutive seqno
> + * @rpdupack - dupacks since rpseq
> + * @av_chunks: list of Ack Vectors received on current skb
> */
> struct ccid2_hc_tx_sock {
> - u32 ccid2hctx_cwnd;
> - u32 ccid2hctx_ssthresh;
> - u32 ccid2hctx_pipe;
> - u32 ccid2hctx_packets_acked;
> - struct ccid2_seq *ccid2hctx_seqbuf[CCID2_SEQBUF_MAX];
> - int ccid2hctx_seqbufc;
> - struct ccid2_seq *ccid2hctx_seqh;
> - struct ccid2_seq *ccid2hctx_seqt;
> + u32 cwnd;
> + u32 ssthresh;
> + u32 pipe;
> + u32 packets_acked;
> + struct ccid2_seq *seqbuf[CCID2_SEQBUF_MAX];
> + int seqbufc;
> + struct ccid2_seq *seqh;
> + struct ccid2_seq *seqt;
> /* RTT measurement: variables/principles are the same as in TCP */
> - u32 ccid2hctx_srtt,
> - ccid2hctx_mdev,
> - ccid2hctx_mdev_max,
> - ccid2hctx_rttvar,
> - ccid2hctx_rto;
> - u64 ccid2hctx_rtt_seq:48;
> - struct timer_list ccid2hctx_rtotimer;
> - u64 ccid2hctx_rpseq;
> - int ccid2hctx_rpdupack;
> - unsigned long ccid2hctx_last_cong;
> - u64 ccid2hctx_high_ack;
> - struct list_head ccid2hctx_av_chunks;
> + u32 srtt,
> + mdev,
> + mdev_max,
> + rttvar,
> + rto;
> + u64 rtt_seq:48;
> + struct timer_list rtotimer;
> + u64 rpseq;
> + int rpdupack;
> + unsigned long last_cong;
> + u64 high_ack;
> + struct list_head av_chunks;
> };
>
> static inline bool ccid2_cwnd_network_limited(struct ccid2_hc_tx_sock *hctx)
> {
> - return (hctx->ccid2hctx_pipe >= hctx->ccid2hctx_cwnd);
> + return (hctx->pipe >= hctx->cwnd);
> }
>
> struct ccid2_hc_rx_sock {
> - int ccid2hcrx_data;
> + int data;
> };
>
> static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk)
> --- a/net/dccp/ccids/ccid2.c
> +++ b/net/dccp/ccids/ccid2.c
> @@ -42,7 +42,7 @@ static int ccid2_hc_tx_alloc_seq(struct
> int i;
>
> /* check if we have space to preserve the pointer to the buffer */
> - if (hctx->ccid2hctx_seqbufc >= (sizeof(hctx->ccid2hctx_seqbuf) /
> + if (hctx->seqbufc >= (sizeof(hctx->seqbuf) /
> sizeof(struct ccid2_seq*)))
> return -ENOMEM;
>
> @@ -59,20 +59,20 @@ static int ccid2_hc_tx_alloc_seq(struct
> seqp->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1];
>
> /* This is the first allocation. Initiate the head and tail. */
> - if (hctx->ccid2hctx_seqbufc == 0)
> - hctx->ccid2hctx_seqh = hctx->ccid2hctx_seqt = seqp;
> + if (hctx->seqbufc == 0)
> + hctx->seqh = hctx->seqt = seqp;
> else {
> /* link the existing list with the one we just created */
> - hctx->ccid2hctx_seqh->ccid2s_next = seqp;
> - seqp->ccid2s_prev = hctx->ccid2hctx_seqh;
> + hctx->seqh->ccid2s_next = seqp;
> + seqp->ccid2s_prev = hctx->seqh;
>
> - hctx->ccid2hctx_seqt->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1];
> - seqp[CCID2_SEQBUF_LEN - 1].ccid2s_next = hctx->ccid2hctx_seqt;
> + hctx->seqt->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1];
> + seqp[CCID2_SEQBUF_LEN - 1].ccid2s_next = hctx->seqt;
> }
>
> /* store the original pointer to the buffer so we can free it */
> - hctx->ccid2hctx_seqbuf[hctx->ccid2hctx_seqbufc] = seqp;
> - hctx->ccid2hctx_seqbufc++;
> + hctx->seqbuf[hctx->seqbufc] = seqp;
> + hctx->seqbufc++;
>
> return 0;
> }
> @@ -87,7 +87,7 @@ static int ccid2_hc_tx_send_packet(struc
> static void ccid2_change_l_ack_ratio(struct sock *sk, u32 val)
> {
> struct dccp_sock *dp = dccp_sk(sk);
> - u32 max_ratio = DIV_ROUND_UP(ccid2_hc_tx_sk(sk)->ccid2hctx_cwnd, 2);
> + u32 max_ratio = DIV_ROUND_UP(ccid2_hc_tx_sk(sk)->cwnd, 2);
>
> /*
> * Ensure that Ack Ratio does not exceed ceil(cwnd/2), which is (2) from
> @@ -117,7 +117,7 @@ static void ccid2_hc_tx_rto_expire(unsig
>
> bh_lock_sock(sk);
> if (sock_owned_by_user(sk)) {
> - sk_reset_timer(sk, &hctx->ccid2hctx_rtotimer,
> + sk_reset_timer(sk, &hctx->rtotimer,
> jiffies + HZ / 5);
> goto out;
> }
> @@ -125,32 +125,32 @@ static void ccid2_hc_tx_rto_expire(unsig
> ccid2_pr_debug("RTO_EXPIRE\n");
>
> /* back-off timer */
> - hctx->ccid2hctx_rto <<= 1;
> - if (hctx->ccid2hctx_rto > DCCP_RTO_MAX)
> - hctx->ccid2hctx_rto = DCCP_RTO_MAX;
> + hctx->rto <<= 1;
> + if (hctx->rto > DCCP_RTO_MAX)
> + hctx->rto = DCCP_RTO_MAX;
>
> /* adjust pipe, cwnd etc */
> - hctx->ccid2hctx_ssthresh = hctx->ccid2hctx_cwnd / 2;
> - if (hctx->ccid2hctx_ssthresh < 2)
> - hctx->ccid2hctx_ssthresh = 2;
> - hctx->ccid2hctx_cwnd = 1;
> - hctx->ccid2hctx_pipe = 0;
> + hctx->ssthresh = hctx->cwnd / 2;
> + if (hctx->ssthresh < 2)
> + hctx->ssthresh = 2;
> + hctx->cwnd = 1;
> + hctx->pipe = 0;
>
> /* clear state about stuff we sent */
> - hctx->ccid2hctx_seqt = hctx->ccid2hctx_seqh;
> - hctx->ccid2hctx_packets_acked = 0;
> + hctx->seqt = hctx->seqh;
> + hctx->packets_acked = 0;
>
> /* clear ack ratio state. */
> - hctx->ccid2hctx_rpseq = 0;
> - hctx->ccid2hctx_rpdupack = -1;
> + hctx->rpseq = 0;
> + hctx->rpdupack = -1;
> ccid2_change_l_ack_ratio(sk, 1);
>
> /* if we were blocked before, we may now send cwnd=1 packet */
> if (sender_was_blocked)
> tasklet_schedule(&dccp_sk(sk)->dccps_xmitlet);
> /* restart backed-off timer */
> - sk_reset_timer(sk, &hctx->ccid2hctx_rtotimer,
> - jiffies + hctx->ccid2hctx_rto);
> + sk_reset_timer(sk, &hctx->rtotimer,
> + jiffies + hctx->rto);
> out:
> bh_unlock_sock(sk);
> sock_put(sk);
> @@ -162,27 +162,27 @@ static void ccid2_hc_tx_packet_sent(stru
> struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
> struct ccid2_seq *next;
>
> - hctx->ccid2hctx_pipe++;
> + hctx->pipe++;
>
> - hctx->ccid2hctx_seqh->ccid2s_seq = dp->dccps_gss;
> - hctx->ccid2hctx_seqh->ccid2s_acked = 0;
> - hctx->ccid2hctx_seqh->ccid2s_sent = jiffies;
> + hctx->seqh->ccid2s_seq = dp->dccps_gss;
> + hctx->seqh->ccid2s_acked = 0;
> + hctx->seqh->ccid2s_sent = jiffies;
>
> - next = hctx->ccid2hctx_seqh->ccid2s_next;
> + next = hctx->seqh->ccid2s_next;
> /* check if we need to alloc more space */
> - if (next == hctx->ccid2hctx_seqt) {
> + if (next == hctx->seqt) {
> if (ccid2_hc_tx_alloc_seq(hctx)) {
> DCCP_CRIT("packet history - out of memory!");
> /* FIXME: find a more graceful way to bail out */
> return;
> }
> - next = hctx->ccid2hctx_seqh->ccid2s_next;
> - BUG_ON(next == hctx->ccid2hctx_seqt);
> + next = hctx->seqh->ccid2s_next;
> + BUG_ON(next == hctx->seqt);
> }
> - hctx->ccid2hctx_seqh = next;
> + hctx->seqh = next;
>
> - ccid2_pr_debug("cwnd=%d pipe=%d\n", hctx->ccid2hctx_cwnd,
> - hctx->ccid2hctx_pipe);
> + ccid2_pr_debug("cwnd=%d pipe=%d\n", hctx->cwnd,
> + hctx->pipe);
>
> /*
> * FIXME: The code below is broken and the variables have been removed
> @@ -205,12 +205,12 @@ static void ccid2_hc_tx_packet_sent(stru
> */
> #if 0
> /* Ack Ratio. Need to maintain a concept of how many windows we sent */
> - hctx->ccid2hctx_arsent++;
> + hctx->arsent++;
> /* We had an ack loss in this window... */
> - if (hctx->ccid2hctx_ackloss) {
> - if (hctx->ccid2hctx_arsent >= hctx->ccid2hctx_cwnd) {
> - hctx->ccid2hctx_arsent = 0;
> - hctx->ccid2hctx_ackloss = 0;
> + if (hctx->ackloss) {
> + if (hctx->arsent >= hctx->cwnd) {
> + hctx->arsent = 0;
> + hctx->ackloss = 0;
> }
> } else {
> /* No acks lost up to now... */
> @@ -220,29 +220,29 @@ static void ccid2_hc_tx_packet_sent(stru
> int denom = dp->dccps_l_ack_ratio * dp->dccps_l_ack_ratio -
> dp->dccps_l_ack_ratio;
>
> - denom = hctx->ccid2hctx_cwnd * hctx->ccid2hctx_cwnd / denom;
> + denom = hctx->cwnd * hctx->cwnd / denom;
>
> - if (hctx->ccid2hctx_arsent >= denom) {
> + if (hctx->arsent >= denom) {
> ccid2_change_l_ack_ratio(sk, dp->dccps_l_ack_ratio - 1);
> - hctx->ccid2hctx_arsent = 0;
> + hctx->arsent = 0;
> }
> } else {
> /* we can't increase ack ratio further [1] */
> - hctx->ccid2hctx_arsent = 0; /* or maybe set it to cwnd*/
> + hctx->arsent = 0; /* or maybe set it to cwnd*/
> }
> }
> #endif
>
> /* setup RTO timer */
> - if (!timer_pending(&hctx->ccid2hctx_rtotimer))
> - sk_reset_timer(sk, &hctx->ccid2hctx_rtotimer,
> - jiffies + hctx->ccid2hctx_rto);
> + if (!timer_pending(&hctx->rtotimer))
> + sk_reset_timer(sk, &hctx->rtotimer,
> + jiffies + hctx->rto);
>
> #ifdef CONFIG_IP_DCCP_CCID2_DEBUG
> do {
> - struct ccid2_seq *seqp = hctx->ccid2hctx_seqt;
> + struct ccid2_seq *seqp = hctx->seqt;
>
> - while (seqp != hctx->ccid2hctx_seqh) {
> + while (seqp != hctx->seqh) {
> ccid2_pr_debug("out seq=%llu acked=%d time=%lu\n",
> (unsigned long long)seqp->ccid2s_seq,
> seqp->ccid2s_acked, seqp->ccid2s_sent);
> @@ -267,23 +267,23 @@ static void ccid2_rtt_estimator(struct s
> struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
> long m = mrtt ? : 1;
>
> - if (hctx->ccid2hctx_srtt == 0) {
> + if (hctx->srtt == 0) {
> /* First measurement m */
> - hctx->ccid2hctx_srtt = m << 3;
> - hctx->ccid2hctx_mdev = m << 1;
> + hctx->srtt = m << 3;
> + hctx->mdev = m << 1;
>
> - hctx->ccid2hctx_mdev_max = max(TCP_RTO_MIN, hctx->ccid2hctx_mdev);
> - hctx->ccid2hctx_rttvar = hctx->ccid2hctx_mdev_max;
> - hctx->ccid2hctx_rtt_seq = dccp_sk(sk)->dccps_gss;
> + hctx->mdev_max = max(TCP_RTO_MIN, hctx->mdev);
> + hctx->rttvar = hctx->mdev_max;
> + hctx->rtt_seq = dccp_sk(sk)->dccps_gss;
> } else {
> /* Update scaled SRTT as SRTT += 1/8 * (m - SRTT) */
> - m -= (hctx->ccid2hctx_srtt >> 3);
> - hctx->ccid2hctx_srtt += m;
> + m -= (hctx->srtt >> 3);
> + hctx->srtt += m;
>
> /* Similarly, update scaled mdev with regard to |m| */
> if (m < 0) {
> m = -m;
> - m -= (hctx->ccid2hctx_mdev >> 2);
> + m -= (hctx->mdev >> 2);
> /*
> * This neutralises RTO increase when RTT < SRTT - mdev
> * (see P. Sarolahti and * A. Kuznetsov,
> @@ -293,14 +293,14 @@ static void ccid2_rtt_estimator(struct s
> if (m > 0)
> m >>= 3;
> } else {
> - m -= (hctx->ccid2hctx_mdev >> 2);
> + m -= (hctx->mdev >> 2);
> }
> - hctx->ccid2hctx_mdev += m;
> + hctx->mdev += m;
>
> - if (hctx->ccid2hctx_mdev > hctx->ccid2hctx_mdev_max) {
> - hctx->ccid2hctx_mdev_max = hctx->ccid2hctx_mdev;
> - if (hctx->ccid2hctx_mdev_max > hctx->ccid2hctx_rttvar)
> - hctx->ccid2hctx_rttvar = hctx->ccid2hctx_mdev_max;
> + if (hctx->mdev > hctx->mdev_max) {
> + hctx->mdev_max = hctx->mdev;
> + if (hctx->mdev_max > hctx->rttvar)
> + hctx->rttvar = hctx->mdev_max;
> }
>
> /*
> @@ -310,11 +310,12 @@ static void ccid2_rtt_estimator(struct s
> * GAR is a useful bound for FlightSize = pipe, AWL is probably
> * too low as it over-estimates pipe.
> */
> - if (after48(dccp_sk(sk)->dccps_gar, hctx->ccid2hctx_rtt_seq)) {
> - if (hctx->ccid2hctx_mdev_max < hctx->ccid2hctx_rttvar)
> - hctx->ccid2hctx_rttvar -= (hctx->ccid2hctx_rttvar - hctx->ccid2hctx_mdev_max) >> 2;
> - hctx->ccid2hctx_rtt_seq = dccp_sk(sk)->dccps_gss;
> - hctx->ccid2hctx_mdev_max = TCP_RTO_MIN;
> + if (after48(dccp_sk(sk)->dccps_gar, hctx->rtt_seq)) {
> + if (hctx->mdev_max < hctx->rttvar)
> + hctx->rttvar -= (hctx->rttvar -
> + hctx->mdev_max) >> 2;
> + hctx->rtt_seq = dccp_sk(sk)->dccps_gss;
> + hctx->mdev_max = TCP_RTO_MIN;
> }
> }
>
> @@ -326,10 +327,10 @@ static void ccid2_rtt_estimator(struct s
> * does not retransmit data, DCCP does not require TCP's recommended
> * minimum timeout of one second".
> */
> - hctx->ccid2hctx_rto = (hctx->ccid2hctx_srtt >> 3) + hctx->ccid2hctx_rttvar;
> + hctx->rto = (hctx->srtt >> 3) + hctx->rttvar;
>
> - if (hctx->ccid2hctx_rto > DCCP_RTO_MAX)
> - hctx->ccid2hctx_rto = DCCP_RTO_MAX;
> + if (hctx->rto > DCCP_RTO_MAX)
> + hctx->rto = DCCP_RTO_MAX;
> }
>
> static void ccid2_new_ack(struct sock *sk, struct ccid2_seq *seqp,
> @@ -337,15 +338,15 @@ static void ccid2_new_ack(struct sock *s
> {
> struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
>
> - if (hctx->ccid2hctx_cwnd < hctx->ccid2hctx_ssthresh) {
> - if (*maxincr > 0 && ++hctx->ccid2hctx_packets_acked == 2) {
> - hctx->ccid2hctx_cwnd += 1;
> - *maxincr -= 1;
> - hctx->ccid2hctx_packets_acked = 0;
> - }
> - } else if (++hctx->ccid2hctx_packets_acked >= hctx->ccid2hctx_cwnd) {
> - hctx->ccid2hctx_cwnd += 1;
> - hctx->ccid2hctx_packets_acked = 0;
> + if (hctx->cwnd < hctx->ssthresh) {
> + if (*maxincr > 0 && ++hctx->packets_acked == 2) {
> + hctx->cwnd += 1;
> + *maxincr -= 1;
> + hctx->packets_acked = 0;
> + }
> + } else if (++hctx->packets_acked >= hctx->cwnd) {
> + hctx->cwnd += 1;
> + hctx->packets_acked = 0;
> }
> /*
> * FIXME: RTT is sampled several times per acknowledgment (for each
> @@ -362,19 +363,19 @@ static void ccid2_congestion_event(struc
> {
> struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
>
> - if (time_before(seqp->ccid2s_sent, hctx->ccid2hctx_last_cong)) {
> + if (time_before(seqp->ccid2s_sent, hctx->last_cong)) {
> ccid2_pr_debug("Multiple losses in an RTT---treating as one\n");
> return;
> }
>
> - hctx->ccid2hctx_last_cong = jiffies;
> + hctx->last_cong = jiffies;
>
> - hctx->ccid2hctx_cwnd = hctx->ccid2hctx_cwnd / 2 ? : 1U;
> - hctx->ccid2hctx_ssthresh = max(hctx->ccid2hctx_cwnd, 2U);
> + hctx->cwnd = hctx->cwnd / 2 ? : 1U;
> + hctx->ssthresh = max(hctx->cwnd, 2U);
>
> /* Avoid spurious timeouts resulting from Ack Ratio > cwnd */
> - if (dccp_sk(sk)->dccps_l_ack_ratio > hctx->ccid2hctx_cwnd)
> - ccid2_change_l_ack_ratio(sk, hctx->ccid2hctx_cwnd);
> + if (dccp_sk(sk)->dccps_l_ack_ratio > hctx->cwnd)
> + ccid2_change_l_ack_ratio(sk, hctx->cwnd);
> }
>
> static int ccid2_hc_tx_parse_options(struct sock *sk, unsigned char option,
> @@ -386,7 +387,7 @@ static int ccid2_hc_tx_parse_options(str
> switch (option) {
> case DCCPO_ACK_VECTOR_0:
> case DCCPO_ACK_VECTOR_1:
> - return dccp_ackvec_parsed_add(&hctx->ccid2hctx_av_chunks, value,
> + return dccp_ackvec_parsed_add(&hctx->av_chunks, value,
> len, option - DCCPO_ACK_VECTOR_0);
> }
> return 0;
> @@ -411,21 +412,21 @@ static void ccid2_hc_tx_packet_recv(stru
> * -sorbo.
> */
> /* need to bootstrap */
> - if (hctx->ccid2hctx_rpdupack == -1) {
> - hctx->ccid2hctx_rpdupack = 0;
> - hctx->ccid2hctx_rpseq = seqno;
> + if (hctx->rpdupack == -1) {
> + hctx->rpdupack = 0;
> + hctx->rpseq = seqno;
> } else {
> /* check if packet is consecutive */
> - if (dccp_delta_seqno(hctx->ccid2hctx_rpseq, seqno) == 1)
> - hctx->ccid2hctx_rpseq = seqno;
> + if (dccp_delta_seqno(hctx->rpseq, seqno) == 1)
> + hctx->rpseq = seqno;
> /* it's a later packet */
> - else if (after48(seqno, hctx->ccid2hctx_rpseq)) {
> - hctx->ccid2hctx_rpdupack++;
> + else if (after48(seqno, hctx->rpseq)) {
> + hctx->rpdupack++;
>
> /* check if we got enough dupacks */
> - if (hctx->ccid2hctx_rpdupack >= NUMDUPACK) {
> - hctx->ccid2hctx_rpdupack = -1; /* XXX lame */
> - hctx->ccid2hctx_rpseq = 0;
> + if (hctx->rpdupack >= NUMDUPACK) {
> + hctx->rpdupack = -1; /* XXX lame */
> + hctx->rpseq = 0;
>
> ccid2_change_l_ack_ratio(sk, 2 * dp->dccps_l_ack_ratio);
> }
> @@ -437,18 +438,18 @@ static void ccid2_hc_tx_packet_recv(stru
> return;
>
> /* still didn't send out new data packets */
> - if (hctx->ccid2hctx_seqh == hctx->ccid2hctx_seqt)
> + if (hctx->seqh == hctx->seqt)
> goto done;
>
> ackno = DCCP_SKB_CB(skb)->dccpd_ack_seq;
> - if (after48(ackno, hctx->ccid2hctx_high_ack))
> - hctx->ccid2hctx_high_ack = ackno;
> + if (after48(ackno, hctx->high_ack))
> + hctx->high_ack = ackno;
>
> - seqp = hctx->ccid2hctx_seqt;
> + seqp = hctx->seqt;
> while (before48(seqp->ccid2s_seq, ackno)) {
> seqp = seqp->ccid2s_next;
> - if (seqp == hctx->ccid2hctx_seqh) {
> - seqp = hctx->ccid2hctx_seqh->ccid2s_prev;
> + if (seqp == hctx->seqh) {
> + seqp = hctx->seqh->ccid2s_prev;
> break;
> }
> }
> @@ -458,11 +459,11 @@ static void ccid2_hc_tx_packet_recv(stru
> * packets per acknowledgement. Rounding up avoids that cwnd is not
> * advanced when Ack Ratio is 1 and gives a slight edge otherwise.
> */
> - if (hctx->ccid2hctx_cwnd < hctx->ccid2hctx_ssthresh)
> + if (hctx->cwnd < hctx->ssthresh)
> maxincr = DIV_ROUND_UP(dp->dccps_l_ack_ratio, 2);
>
> /* go through all ack vectors */
> - list_for_each_entry(avp, &hctx->ccid2hctx_av_chunks, node) {
> + list_for_each_entry(avp, &hctx->av_chunks, node) {
> /* go through this ack vector */
> for (; avp->len--; avp->vec++) {
> u64 ackno_end_rl = SUB48(ackno,
> @@ -477,7 +478,7 @@ static void ccid2_hc_tx_packet_recv(stru
> * seqnos.
> */
> while (after48(seqp->ccid2s_seq, ackno)) {
> - if (seqp == hctx->ccid2hctx_seqt) {
> + if (seqp == hctx->seqt) {
> done = 1;
> break;
> }
> @@ -505,9 +506,9 @@ static void ccid2_hc_tx_packet_recv(stru
> seqp->ccid2s_acked = 1;
> ccid2_pr_debug("Got ack for %llu\n",
> (unsigned long long)seqp->ccid2s_seq);
> - hctx->ccid2hctx_pipe--;
> + hctx->pipe--;
> }
> - if (seqp == hctx->ccid2hctx_seqt) {
> + if (seqp == hctx->seqt) {
> done = 1;
> break;
> }
> @@ -525,11 +526,11 @@ static void ccid2_hc_tx_packet_recv(stru
> /* The state about what is acked should be correct now
> * Check for NUMDUPACK
> */
> - seqp = hctx->ccid2hctx_seqt;
> - while (before48(seqp->ccid2s_seq, hctx->ccid2hctx_high_ack)) {
> + seqp = hctx->seqt;
> + while (before48(seqp->ccid2s_seq, hctx->high_ack)) {
> seqp = seqp->ccid2s_next;
> - if (seqp == hctx->ccid2hctx_seqh) {
> - seqp = hctx->ccid2hctx_seqh->ccid2s_prev;
> + if (seqp == hctx->seqh) {
> + seqp = hctx->seqh->ccid2s_prev;
> break;
> }
> }
> @@ -540,7 +541,7 @@ static void ccid2_hc_tx_packet_recv(stru
> if (done == NUMDUPACK)
> break;
> }
> - if (seqp == hctx->ccid2hctx_seqt)
> + if (seqp == hctx->seqt)
> break;
> seqp = seqp->ccid2s_prev;
> }
> @@ -561,35 +562,35 @@ static void ccid2_hc_tx_packet_recv(stru
> * one ack vector.
> */
> ccid2_congestion_event(sk, seqp);
> - hctx->ccid2hctx_pipe--;
> + hctx->pipe--;
> }
> - if (seqp == hctx->ccid2hctx_seqt)
> + if (seqp == hctx->seqt)
> break;
> seqp = seqp->ccid2s_prev;
> }
>
> - hctx->ccid2hctx_seqt = last_acked;
> + hctx->seqt = last_acked;
> }
>
> /* trim acked packets in tail */
> - while (hctx->ccid2hctx_seqt != hctx->ccid2hctx_seqh) {
> - if (!hctx->ccid2hctx_seqt->ccid2s_acked)
> + while (hctx->seqt != hctx->seqh) {
> + if (!hctx->seqt->ccid2s_acked)
> break;
>
> - hctx->ccid2hctx_seqt = hctx->ccid2hctx_seqt->ccid2s_next;
> + hctx->seqt = hctx->seqt->ccid2s_next;
> }
>
> /* restart RTO timer if not all outstanding data has been acked */
> - if (hctx->ccid2hctx_pipe == 0)
> - sk_stop_timer(sk, &hctx->ccid2hctx_rtotimer);
> + if (hctx->pipe == 0)
> + sk_stop_timer(sk, &hctx->rtotimer);
> else
> - sk_reset_timer(sk, &hctx->ccid2hctx_rtotimer,
> - jiffies + hctx->ccid2hctx_rto);
> + sk_reset_timer(sk, &hctx->rtotimer,
> + jiffies + hctx->rto);
> done:
> /* check if incoming Acks allow pending packets to be sent */
> if (sender_was_blocked && !ccid2_cwnd_network_limited(hctx))
> tasklet_schedule(&dccp_sk(sk)->dccps_xmitlet);
> - dccp_ackvec_parsed_cleanup(&hctx->ccid2hctx_av_chunks);
> + dccp_ackvec_parsed_cleanup(&hctx->av_chunks);
> }
>
> static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk)
> @@ -599,17 +600,17 @@ static int ccid2_hc_tx_init(struct ccid
> u32 max_ratio;
>
> /* RFC 4341, 5: initialise ssthresh to arbitrarily high (max) value */
> - hctx->ccid2hctx_ssthresh = ~0U;
> + hctx->ssthresh = ~0U;
>
> /*
> * RFC 4341, 5: "The cwnd parameter is initialized to at most four
> * packets for new connections, following the rules from [RFC3390]".
> * We need to convert the bytes of RFC3390 into the packets of RFC 4341.
> */
> - hctx->ccid2hctx_cwnd = min(4U, max(2U, 4380U / dp->dccps_mss_cache));
> + hctx->cwnd = min(4U, max(2U, 4380U / dp->dccps_mss_cache));
>
> /* Make sure that Ack Ratio is enabled and within bounds. */
> - max_ratio = DIV_ROUND_UP(hctx->ccid2hctx_cwnd, 2);
> + max_ratio = DIV_ROUND_UP(hctx->cwnd, 2);
> if (dp->dccps_l_ack_ratio == 0 || dp->dccps_l_ack_ratio > max_ratio)
> dp->dccps_l_ack_ratio = max_ratio;
>
> @@ -617,12 +618,12 @@ static int ccid2_hc_tx_init(struct ccid
> if (ccid2_hc_tx_alloc_seq(hctx))
> return -ENOMEM;
>
> - hctx->ccid2hctx_rto = DCCP_TIMEOUT_INIT;
> - hctx->ccid2hctx_rpdupack = -1;
> - hctx->ccid2hctx_last_cong = jiffies;
> - setup_timer(&hctx->ccid2hctx_rtotimer, ccid2_hc_tx_rto_expire,
> + hctx->rto = DCCP_TIMEOUT_INIT;
> + hctx->rpdupack = -1;
> + hctx->last_cong = jiffies;
> + setup_timer(&hctx->rtotimer, ccid2_hc_tx_rto_expire,
> (unsigned long)sk);
> - INIT_LIST_HEAD(&hctx->ccid2hctx_av_chunks);
> + INIT_LIST_HEAD(&hctx->av_chunks);
> return 0;
> }
>
> @@ -631,11 +632,11 @@ static void ccid2_hc_tx_exit(struct sock
> struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
> int i;
>
> - sk_stop_timer(sk, &hctx->ccid2hctx_rtotimer);
> + sk_stop_timer(sk, &hctx->rtotimer);
>
> - for (i = 0; i < hctx->ccid2hctx_seqbufc; i++)
> - kfree(hctx->ccid2hctx_seqbuf[i]);
> - hctx->ccid2hctx_seqbufc = 0;
> + for (i = 0; i < hctx->seqbufc; i++)
> + kfree(hctx->seqbuf[i]);
> + hctx->seqbufc = 0;
> }
>
> static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
> @@ -646,10 +647,10 @@ static void ccid2_hc_rx_packet_recv(stru
> switch (DCCP_SKB_CB(skb)->dccpd_type) {
> case DCCP_PKT_DATA:
> case DCCP_PKT_DATAACK:
> - hcrx->ccid2hcrx_data++;
> - if (hcrx->ccid2hcrx_data >= dp->dccps_r_ack_ratio) {
> + hcrx->data++;
> + if (hcrx->data >= dp->dccps_r_ack_ratio) {
> dccp_send_ack(sk);
> - hcrx->ccid2hcrx_data = 0;
> + hcrx->data = 0;
> }
> break;
> }
> --
> --
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>
Acked-off-by: Leandro Melo de Sales <leandroal@...il.com>
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