diff options
| -rw-r--r-- | net/dccp/ccids/ccid2.c | 322 |
1 files changed, 161 insertions, 161 deletions
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c index 0675fd6215c..a47a8c918ee 100644 --- a/net/dccp/ccids/ccid2.c +++ b/net/dccp/ccids/ccid2.c @@ -33,20 +33,20 @@ static int ccid2_debug; #define ccid2_pr_debug(format, a...) DCCP_PR_DEBUG(ccid2_debug, format, ##a) -static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx) +static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hc) { int len = 0; int pipe = 0; - struct ccid2_seq *seqp = hctx->tx_seqh; + struct ccid2_seq *seqp = hc->tx_seqh; /* there is data in the chain */ - if (seqp != hctx->tx_seqt) { + if (seqp != hc->tx_seqt) { seqp = seqp->ccid2s_prev; len++; if (!seqp->ccid2s_acked) pipe++; - while (seqp != hctx->tx_seqt) { + while (seqp != hc->tx_seqt) { struct ccid2_seq *prev = seqp->ccid2s_prev; len++; @@ -63,30 +63,30 @@ static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx) } } - BUG_ON(pipe != hctx->tx_pipe); + BUG_ON(pipe != hc->tx_pipe); ccid2_pr_debug("len of chain=%d\n", len); do { seqp = seqp->ccid2s_prev; len++; - } while (seqp != hctx->tx_seqh); + } while (seqp != hc->tx_seqh); ccid2_pr_debug("total len=%d\n", len); - BUG_ON(len != hctx->tx_seqbufc * CCID2_SEQBUF_LEN); + BUG_ON(len != hc->tx_seqbufc * CCID2_SEQBUF_LEN); } #else #define ccid2_pr_debug(format, a...) -#define ccid2_hc_tx_check_sanity(hctx) +#define ccid2_hc_tx_check_sanity(hc) #endif -static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx) +static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hc) { struct ccid2_seq *seqp; int i; /* check if we have space to preserve the pointer to the buffer */ - if (hctx->tx_seqbufc >= (sizeof(hctx->tx_seqbuf) / - sizeof(struct ccid2_seq *))) + if (hc->tx_seqbufc >= (sizeof(hc->tx_seqbuf) / + sizeof(struct ccid2_seq *))) return -ENOMEM; /* allocate buffer and initialize linked list */ @@ -102,29 +102,29 @@ static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx) seqp->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1]; /* This is the first allocation. Initiate the head and tail. */ - if (hctx->tx_seqbufc == 0) - hctx->tx_seqh = hctx->tx_seqt = seqp; + if (hc->tx_seqbufc == 0) + hc->tx_seqh = hc->tx_seqt = seqp; else { /* link the existing list with the one we just created */ - hctx->tx_seqh->ccid2s_next = seqp; - seqp->ccid2s_prev = hctx->tx_seqh; + hc->tx_seqh->ccid2s_next = seqp; + seqp->ccid2s_prev = hc->tx_seqh; - hctx->tx_seqt->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1]; - seqp[CCID2_SEQBUF_LEN - 1].ccid2s_next = hctx->tx_seqt; + hc->tx_seqt->ccid2s_prev = &seqp[CCID2_SEQBUF_LEN - 1]; + seqp[CCID2_SEQBUF_LEN - 1].ccid2s_next = hc->tx_seqt; } /* store the original pointer to the buffer so we can free it */ - hctx->tx_seqbuf[hctx->tx_seqbufc] = seqp; - hctx->tx_seqbufc++; + hc->tx_seqbuf[hc->tx_seqbufc] = seqp; + hc->tx_seqbufc++; return 0; } static int ccid2_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb) { - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); - if (hctx->tx_pipe < hctx->tx_cwnd) + if (hc->tx_pipe < hc->tx_cwnd) return 0; return 1; /* XXX CCID should dequeue when ready instead of polling */ @@ -155,10 +155,10 @@ static void ccid2_change_l_ack_ratio(struct sock *sk, u32 val) dp->dccps_l_ack_ratio = val; } -static void ccid2_change_srtt(struct ccid2_hc_tx_sock *hctx, long val) +static void ccid2_change_srtt(struct ccid2_hc_tx_sock *hc, long val) { ccid2_pr_debug("change SRTT to %ld\n", val); - hctx->tx_srtt = val; + hc->tx_srtt = val; } static void ccid2_start_rto_timer(struct sock *sk); @@ -166,44 +166,44 @@ static void ccid2_start_rto_timer(struct sock *sk); static void ccid2_hc_tx_rto_expire(unsigned long data) { struct sock *sk = (struct sock *)data; - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); long s; bh_lock_sock(sk); if (sock_owned_by_user(sk)) { - sk_reset_timer(sk, &hctx->tx_rtotimer, jiffies + HZ / 5); + sk_reset_timer(sk, &hc->tx_rtotimer, jiffies + HZ / 5); goto out; } ccid2_pr_debug("RTO_EXPIRE\n"); - ccid2_hc_tx_check_sanity(hctx); + ccid2_hc_tx_check_sanity(hc); /* back-off timer */ - hctx->tx_rto <<= 1; + hc->tx_rto <<= 1; - s = hctx->tx_rto / HZ; + s = hc->tx_rto / HZ; if (s > 60) - hctx->tx_rto = 60 * HZ; + hc->tx_rto = 60 * HZ; ccid2_start_rto_timer(sk); /* adjust pipe, cwnd etc */ - hctx->tx_ssthresh = hctx->tx_cwnd / 2; - if (hctx->tx_ssthresh < 2) - hctx->tx_ssthresh = 2; - hctx->tx_cwnd = 1; - hctx->tx_pipe = 0; + hc->tx_ssthresh = hc->tx_cwnd / 2; + if (hc->tx_ssthresh < 2) + hc->tx_ssthresh = 2; + hc->tx_cwnd = 1; + hc->tx_pipe = 0; /* clear state about stuff we sent */ - hctx->tx_seqt = hctx->tx_seqh; - hctx->tx_packets_acked = 0; + hc->tx_seqt = hc->tx_seqh; + hc->tx_packets_acked = 0; /* clear ack ratio state. */ - hctx->tx_rpseq = 0; - hctx->tx_rpdupack = -1; + hc->tx_rpseq = 0; + hc->tx_rpdupack = -1; ccid2_change_l_ack_ratio(sk, 1); - ccid2_hc_tx_check_sanity(hctx); + ccid2_hc_tx_check_sanity(hc); out: bh_unlock_sock(sk); sock_put(sk); @@ -211,40 +211,40 @@ out: static void ccid2_start_rto_timer(struct sock *sk) { - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); - ccid2_pr_debug("setting RTO timeout=%ld\n", hctx->tx_rto); + ccid2_pr_debug("setting RTO timeout=%ld\n", hc->tx_rto); - BUG_ON(timer_pending(&hctx->tx_rtotimer)); - sk_reset_timer(sk, &hctx->tx_rtotimer, jiffies + hctx->tx_rto); + BUG_ON(timer_pending(&hc->tx_rtotimer)); + sk_reset_timer(sk, &hc->tx_rtotimer, jiffies + hc->tx_rto); } static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len) { struct dccp_sock *dp = dccp_sk(sk); - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); struct ccid2_seq *next; - hctx->tx_pipe++; + hc->tx_pipe++; - hctx->tx_seqh->ccid2s_seq = dp->dccps_gss; - hctx->tx_seqh->ccid2s_acked = 0; - hctx->tx_seqh->ccid2s_sent = jiffies; + hc->tx_seqh->ccid2s_seq = dp->dccps_gss; + hc->tx_seqh->ccid2s_acked = 0; + hc->tx_seqh->ccid2s_sent = jiffies; - next = hctx->tx_seqh->ccid2s_next; + next = hc->tx_seqh->ccid2s_next; /* check if we need to alloc more space */ - if (next == hctx->tx_seqt) { - if (ccid2_hc_tx_alloc_seq(hctx)) { + if (next == hc->tx_seqt) { + if (ccid2_hc_tx_alloc_seq(hc)) { DCCP_CRIT("packet history - out of memory!"); /* FIXME: find a more graceful way to bail out */ return; } - next = hctx->tx_seqh->ccid2s_next; - BUG_ON(next == hctx->tx_seqt); + next = hc->tx_seqh->ccid2s_next; + BUG_ON(next == hc->tx_seqt); } - hctx->tx_seqh = next; + hc->tx_seqh = next; - ccid2_pr_debug("cwnd=%d pipe=%d\n", hctx->tx_cwnd, hctx->tx_pipe); + ccid2_pr_debug("cwnd=%d pipe=%d\n", hc->tx_cwnd, hc->tx_pipe); /* * FIXME: The code below is broken and the variables have been removed @@ -267,12 +267,12 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len) */ #if 0 /* Ack Ratio. Need to maintain a concept of how many windows we sent */ - hctx->tx_arsent++; + hc->tx_arsent++; /* We had an ack loss in this window... */ - if (hctx->tx_ackloss) { - if (hctx->tx_arsent >= hctx->tx_cwnd) { - hctx->tx_arsent = 0; - hctx->tx_ackloss = 0; + if (hc->tx_ackloss) { + if (hc->tx_arsent >= hc->tx_cwnd) { + hc->tx_arsent = 0; + hc->tx_ackloss = 0; } } else { /* No acks lost up to now... */ @@ -282,28 +282,28 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len) int denom = dp->dccps_l_ack_ratio * dp->dccps_l_ack_ratio - dp->dccps_l_ack_ratio; - denom = hctx->tx_cwnd * hctx->tx_cwnd / denom; + denom = hc->tx_cwnd * hc->tx_cwnd / denom; - if (hctx->tx_arsent >= denom) { + if (hc->tx_arsent >= denom) { ccid2_change_l_ack_ratio(sk, dp->dccps_l_ack_ratio - 1); - hctx->tx_arsent = 0; + hc->tx_arsent = 0; } } else { /* we can't increase ack ratio further [1] */ - hctx->tx_arsent = 0; /* or maybe set it to cwnd*/ + hc->tx_arsent = 0; /* or maybe set it to cwnd*/ } } #endif /* setup RTO timer */ - if (!timer_pending(&hctx->tx_rtotimer)) + if (!timer_pending(&hc->tx_rtotimer)) ccid2_start_rto_timer(sk); #ifdef CONFIG_IP_DCCP_CCID2_DEBUG do { - struct ccid2_seq *seqp = hctx->tx_seqt; + struct ccid2_seq *seqp = hc->tx_seqt; - while (seqp != hctx->tx_seqh) { + while (seqp != hc->tx_seqh) { ccid2_pr_debug("out seq=%llu acked=%d time=%lu\n", (unsigned long long)seqp->ccid2s_seq, seqp->ccid2s_acked, seqp->ccid2s_sent); @@ -311,7 +311,7 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len) } } while (0); ccid2_pr_debug("=========\n"); - ccid2_hc_tx_check_sanity(hctx); + ccid2_hc_tx_check_sanity(hc); #endif } @@ -379,9 +379,9 @@ out_invalid_option: static void ccid2_hc_tx_kill_rto_timer(struct sock *sk) { - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); - sk_stop_timer(sk, &hctx->tx_rtotimer); + sk_stop_timer(sk, &hc->tx_rtotimer); ccid2_pr_debug("deleted RTO timer\n"); } @@ -389,75 +389,75 @@ static inline void ccid2_new_ack(struct sock *sk, struct ccid2_seq *seqp, unsigned int *maxincr) { - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); - if (hctx->tx_cwnd < hctx->tx_ssthresh) { - if (*maxincr > 0 && ++hctx->tx_packets_acked == 2) { - hctx->tx_cwnd += 1; - *maxincr -= 1; - hctx->tx_packets_acked = 0; + if (hc->tx_cwnd < hc->tx_ssthresh) { + if (*maxincr > 0 && ++hc->tx_packets_acked == 2) { + hc->tx_cwnd += 1; + *maxincr -= 1; + hc->tx_packets_acked = 0; } - } else if (++hctx->tx_packets_acked >= hctx->tx_cwnd) { - hctx->tx_cwnd += 1; - hctx->tx_packets_acked = 0; + } else if (++hc->tx_packets_acked >= hc->tx_cwnd) { + hc->tx_cwnd += 1; + hc->tx_packets_acked = 0; } /* update RTO */ - if (hctx->tx_srtt == -1 || - time_after(jiffies, hctx->tx_lastrtt + hctx->tx_srtt)) { + if (hc->tx_srtt == -1 || + time_after(jiffies, hc->tx_lastrtt + hc->tx_srtt)) { unsigned long r = (long)jiffies - (long)seqp->ccid2s_sent; int s; /* first measurement */ - if (hctx->tx_srtt == -1) { + if (hc->tx_srtt == -1) { ccid2_pr_debug("R: %lu Time=%lu seq=%llu\n", r, jiffies, (unsigned long long)seqp->ccid2s_seq); - ccid2_change_srtt(hctx, r); - hctx->tx_rttvar = r >> 1; + ccid2_change_srtt(hc, r); + hc->tx_rttvar = r >> 1; } else { /* RTTVAR */ - long tmp = hctx->tx_srtt - r; + long tmp = hc->tx_srtt - r; long srtt; if (tmp < 0) tmp *= -1; tmp >>= 2; - hctx->tx_rttvar *= 3; - hctx->tx_rttvar >>= 2; - hctx->tx_rttvar += tmp; + hc->tx_rttvar *= 3; + hc->tx_rttvar >>= 2; + hc->tx_rttvar += tmp; /* SRTT */ - srtt = hctx->tx_srtt; + srtt = hc->tx_srtt; srtt *= 7; srtt >>= 3; tmp = r >> 3; srtt += tmp; - ccid2_change_srtt(hctx, srtt); + ccid2_change_srtt(hc, srtt); } - s = hctx->tx_rttvar << 2; + s = hc->tx_rttvar << 2; /* clock granularity is 1 when based on jiffies */ if (!s) s = 1; - hctx->tx_rto = hctx->tx_srtt + s; + hc->tx_rto = hc->tx_srtt + s; /* must be at least a second */ - s = hctx->tx_rto / HZ; + s = hc->tx_rto / HZ; /* DCCP doesn't require this [but I like it cuz my code sux] */ #if 1 if (s < 1) - hctx->tx_rto = HZ; + hc->tx_rto = HZ; #endif /* max 60 seconds */ if (s > 60) - hctx->tx_rto = HZ * 60; + hc->tx_rto = HZ * 60; - hctx->tx_lastrtt = jiffies; + hc->tx_lastrtt = jiffies; ccid2_pr_debug("srtt: %ld rttvar: %ld rto: %ld (HZ=%d) R=%lu\n", - hctx->tx_srtt, hctx->tx_rttvar, - hctx->tx_rto, HZ, r); + hc->tx_srtt, hc->tx_rttvar, + hc->tx_rto, HZ, r); } /* we got a new ack, so re-start RTO timer */ @@ -467,40 +467,40 @@ static inline void ccid2_new_ack(struct sock *sk, static void ccid2_hc_tx_dec_pipe(struct sock *sk) { - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); - if (hctx->tx_pipe == 0) + if (hc->tx_pipe == 0) DCCP_BUG("pipe == 0"); else - hctx->tx_pipe--; + hc->tx_pipe--; - if (hctx->tx_pipe == 0) + if (hc->tx_pipe == 0) ccid2_hc_tx_kill_rto_timer(sk); } static void ccid2_congestion_event(struct sock *sk, struct ccid2_seq *seqp) { - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); - if (time_before(seqp->ccid2s_sent, hctx->tx_last_cong)) { + if (time_before(seqp->ccid2s_sent, hc->tx_last_cong)) { ccid2_pr_debug("Multiple losses in an RTT---treating as one\n"); return; } - hctx->tx_last_cong = jiffies; + hc->tx_last_cong = jiffies; - hctx->tx_cwnd = hctx->tx_cwnd / 2 ? : 1U; - hctx->tx_ssthresh = max(hctx->tx_cwnd, 2U); + hc->tx_cwnd = hc->tx_cwnd / 2 ? : 1U; + hc->tx_ssthresh = max(hc->tx_cwnd, 2U); /* Avoid spurious timeouts resulting from Ack Ratio > cwnd */ - if (dccp_sk(sk)->dccps_l_ack_ratio > hctx->tx_cwnd) - ccid2_change_l_ack_ratio(sk, hctx->tx_cwnd); + if (dccp_sk(sk)->dccps_l_ack_ratio > hc->tx_cwnd) + ccid2_change_l_ack_ratio(sk, hc->tx_cwnd); } static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) { struct dccp_sock *dp = dccp_sk(sk); - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); u64 ackno, seqno; struct ccid2_seq *seqp; unsigned char *vector; @@ -509,7 +509,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) int done = 0; unsigned int maxincr = 0; - ccid2_hc_tx_check_sanity(hctx); + ccid2_hc_tx_check_sanity(hc); /* check reverse path congestion */ seqno = DCCP_SKB_CB(skb)->dccpd_seq; @@ -518,21 +518,21 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) * -sorbo. */ /* need to bootstrap */ - if (hctx->tx_rpdupack == -1) { - hctx->tx_rpdupack = 0; - hctx->tx_rpseq = seqno; + if (hc->tx_rpdupack == -1) { + hc->tx_rpdupack = 0; + hc->tx_rpseq = seqno; } else { /* check if packet is consecutive */ - if (dccp_delta_seqno(hctx->tx_rpseq, seqno) == 1) - hctx->tx_rpseq = seqno; + if (dccp_delta_seqno(hc->tx_rpseq, seqno) == 1) + hc->tx_rpseq = seqno; /* it's a later packet */ - else if (after48(seqno, hctx->tx_rpseq)) { - hctx->tx_rpdupack++; + else if (after48(seqno, hc->tx_rpseq)) { + hc->tx_rpdupack++; /* check if we got enough dupacks */ - if (hctx->tx_rpdupack >= NUMDUPACK) { - hctx->tx_rpdupack = -1; /* XXX lame */ - hctx->tx_rpseq = 0; + if (hc->tx_rpdupack >= NUMDUPACK) { + hc->tx_rpdupack = -1; /* XXX lame */ + hc->tx_rpseq = 0; ccid2_change_l_ack_ratio(sk, 2 * dp->dccps_l_ack_ratio); } @@ -541,7 +541,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) /* check forward path congestion */ /* still didn't send out new data packets */ - if (hctx->tx_seqh == hctx->tx_seqt) + if (hc->tx_seqh == hc->tx_seqt) return; switch (DCCP_SKB_CB(skb)->dccpd_type) { @@ -553,14 +553,14 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) } ackno = DCCP_SKB_CB(skb)->dccpd_ack_seq; - if (after48(ackno, hctx->tx_high_ack)) - hctx->tx_high_ack = ackno; + if (after48(ackno, hc->tx_high_ack)) + hc->tx_high_ack = ackno; - seqp = hctx->tx_seqt; + seqp = hc->tx_seqt; while (before48(seqp->ccid2s_seq, ackno)) { seqp = seqp->ccid2s_next; - if (seqp == hctx->tx_seqh) { - seqp = hctx->tx_seqh->ccid2s_prev; + if (seqp == hc->tx_seqh) { + seqp = hc->tx_seqh->ccid2s_prev; break; } } @@ -570,7 +570,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) * packets per acknowledgement. Rounding up avoids that cwnd is not * advanced when Ack Ratio is 1 and gives a slight edge otherwise. */ - if (hctx->tx_cwnd < hctx->tx_ssthresh) + if (hc->tx_cwnd < hc->tx_ssthresh) maxincr = DIV_ROUND_UP(dp->dccps_l_ack_ratio, 2); /* go through all ack vectors */ @@ -589,7 +589,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) * seqnos. */ while (after48(seqp->ccid2s_seq, ackno)) { - if (seqp == hctx->tx_seqt) { + if (seqp == hc->tx_seqt) { done = 1; break; } @@ -621,7 +621,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) (unsigned long long)seqp->ccid2s_seq); ccid2_hc_tx_dec_pipe(sk); } - if (seqp == hctx->tx_seqt) { + if (seqp == hc->tx_seqt) { done = 1; break; } @@ -640,11 +640,11 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) /* The state about what is acked should be correct now * Check for NUMDUPACK */ - seqp = hctx->tx_seqt; - while (before48(seqp->ccid2s_seq, hctx->tx_high_ack)) { + seqp = hc->tx_seqt; + while (before48(seqp->ccid2s_seq, hc->tx_high_ack)) { seqp = seqp->ccid2s_next; - if (seqp == hctx->tx_seqh) { - seqp = hctx->tx_seqh->ccid2s_prev; + if (seqp == hc->tx_seqh) { + seqp = hc->tx_seqh->ccid2s_prev; break; } } @@ -655,7 +655,7 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) if (done == NUMDUPACK) break; } - if (seqp == hctx->tx_seqt) + if (seqp == hc->tx_seqt) break; seqp = seqp->ccid2s_prev; } @@ -678,86 +678,86 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) ccid2_congestion_event(sk, seqp); ccid2_hc_tx_dec_pipe(sk); } - if (seqp == hctx->tx_seqt) + if (seqp == hc->tx_seqt) break; seqp = seqp->ccid2s_prev; } - hctx->tx_seqt = last_acked; + hc->tx_seqt = last_acked; } /* trim acked packets in tail */ - while (hctx->tx_seqt != hctx->tx_seqh) { - if (!hctx->tx_seqt->ccid2s_acked) + while (hc->tx_seqt != hc->tx_seqh) { + if (!hc->tx_seqt->ccid2s_acked) break; - hctx->tx_seqt = hctx->tx_seqt->ccid2s_next; + hc->tx_seqt = hc->tx_seqt->ccid2s_next; } - ccid2_hc_tx_check_sanity(hctx); + ccid2_hc_tx_check_sanity(hc); } static int ccid2_hc_tx_init(struct ccid *ccid, struct sock *sk) { - struct ccid2_hc_tx_sock *hctx = ccid_priv(ccid); + struct ccid2_hc_tx_sock *hc = ccid_priv(ccid); struct dccp_sock *dp = dccp_sk(sk); u32 max_ratio; /* RFC 4341, 5: initialise ssthresh to arbitrarily high (max) value */ - hctx->tx_ssthresh = ~0U; + hc->tx_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->tx_cwnd = clamp(4380U / dp->dccps_mss_cache, 2U, 4U); + hc->tx_cwnd = clamp(4380U / dp->dccps_mss_cache, 2U, 4U); /* Make sure that Ack Ratio is enabled and within bounds. */ - max_ratio = DIV_ROUND_UP(hctx->tx_cwnd, 2); + max_ratio = DIV_ROUND_UP(hc->tx_cwnd, 2); if (dp->dccps_l_ack_ratio == 0 || dp->dccps_l_ack_ratio > max_ratio) dp->dccps_l_ack_ratio = max_ratio; /* XXX init ~ to window size... */ - if (ccid2_hc_tx_alloc_seq(hctx)) + if (ccid2_hc_tx_alloc_seq(hc)) return -ENOMEM; - hctx->tx_rto = 3 * HZ; - ccid2_change_srtt(hctx, -1); - hctx->tx_rttvar = -1; - hctx->tx_rpdupack = -1; - hctx->tx_last_cong = jiffies; - setup_timer(&hctx->tx_rtotimer, ccid2_hc_tx_rto_expire, + hc->tx_rto = 3 * HZ; + ccid2_change_srtt(hc, -1); + hc->tx_rttvar = -1; + hc->tx_rpdupack = -1; + hc->tx_last_cong = jiffies; + setup_timer(&hc->tx_rtotimer, ccid2_hc_tx_rto_expire, (unsigned long)sk); - ccid2_hc_tx_check_sanity(hctx); + ccid2_hc_tx_check_sanity(hc); return 0; } static void ccid2_hc_tx_exit(struct sock *sk) { - struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk); + struct ccid2_hc_tx_sock *hc = ccid2_hc_tx_sk(sk); int i; ccid2_hc_tx_kill_rto_timer(sk); - for (i = 0; i < hctx->tx_seqbufc; i++) - kfree(hctx->tx_seqbuf[i]); - hctx->tx_seqbufc = 0; + for (i = 0; i < hc->tx_seqbufc; i++) + kfree(hc->tx_seqbuf[i]); + hc->tx_seqbufc = 0; } static void ccid2_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb) { const struct dccp_sock *dp = dccp_sk(sk); - struct ccid2_hc_rx_sock *hcrx = ccid2_hc_rx_sk(sk); + struct ccid2_hc_rx_sock *hc = ccid2_hc_rx_sk(sk); switch (DCCP_SKB_CB(skb)->dccpd_type) { case DCCP_PKT_DATA: case DCCP_PKT_DATAACK: - hcrx->rx_data++; - if (hcrx->rx_data >= dp->dccps_r_ack_ratio) { + hc->rx_data++; + if (hc->rx_data >= dp->dccps_r_ack_ratio) { dccp_send_ack(sk); - hcrx->rx_data = 0; + hc->rx_data = 0; } break; } |