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-rw-r--r--net/dccp/ccids/ccid2.c76
1 files changed, 26 insertions, 50 deletions
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index b40c456..d4f9e2d 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -37,10 +37,7 @@
static int ccid2_debug;
-#if 0
-#define CCID2_DEBUG
-#endif
-
+#undef CCID2_DEBUG
#ifdef CCID2_DEBUG
#define ccid2_pr_debug(format, a...) \
do { if (ccid2_debug) \
@@ -56,10 +53,8 @@ static const int ccid2_seq_len = 128;
static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx)
{
int len = 0;
- struct ccid2_seq *seqp;
int pipe = 0;
-
- seqp = hctx->ccid2hctx_seqh;
+ struct ccid2_seq *seqp = hctx->ccid2hctx_seqh;
/* there is data in the chain */
if (seqp != hctx->ccid2hctx_seqt) {
@@ -69,9 +64,8 @@ static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx)
pipe++;
while (seqp != hctx->ccid2hctx_seqt) {
- struct ccid2_seq *prev;
+ struct ccid2_seq *prev = seqp->ccid2s_prev;
- prev = seqp->ccid2s_prev;
len++;
if (!prev->ccid2s_acked)
pipe++;
@@ -92,7 +86,7 @@ static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx)
seqp = seqp->ccid2s_prev;
len++;
BUG_ON(len > ccid2_seq_len);
- } while(seqp != hctx->ccid2hctx_seqh);
+ } while (seqp != hctx->ccid2hctx_seqh);
BUG_ON(len != ccid2_seq_len);
ccid2_pr_debug("total len=%d\n", len);
@@ -141,7 +135,7 @@ static void ccid2_change_l_ack_ratio(struct sock *sk, int val)
* -sorbo.
*/
if (val != 2) {
- struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
+ const struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
int max = hctx->ccid2hctx_cwnd / 2;
/* round up */
@@ -179,9 +173,6 @@ static void ccid2_hc_tx_rto_expire(unsigned long data)
struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
long s;
- /* XXX I don't think i'm locking correctly
- * -sorbo.
- */
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
sk_reset_timer(sk, &hctx->ccid2hctx_rtotimer,
@@ -278,36 +269,33 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, int len)
/* 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;
+ hctx->ccid2hctx_arsent = 0;
+ hctx->ccid2hctx_ackloss = 0;
}
- }
- /* No acks lost up to now... */
- else {
+ } else {
+ /* No acks lost up to now... */
/* decrease ack ratio if enough packets were sent */
if (dp->dccps_l_ack_ratio > 1) {
/* XXX don't calculate denominator each time */
- int denom;
+ int denom = dp->dccps_l_ack_ratio * dp->dccps_l_ack_ratio -
+ dp->dccps_l_ack_ratio;
- denom = dp->dccps_l_ack_ratio * dp->dccps_l_ack_ratio -
- dp->dccps_l_ack_ratio;
denom = hctx->ccid2hctx_cwnd * hctx->ccid2hctx_cwnd / denom;
if (hctx->ccid2hctx_arsent >= denom) {
ccid2_change_l_ack_ratio(sk, dp->dccps_l_ack_ratio - 1);
hctx->ccid2hctx_arsent = 0;
}
- }
- /* we can't increase ack ratio further [1] */
- else {
+ } else {
+ /* we can't increase ack ratio further [1] */
hctx->ccid2hctx_arsent = 0; /* or maybe set it to cwnd*/
}
}
/* setup RTO timer */
- if (!timer_pending(&hctx->ccid2hctx_rtotimer)) {
+ if (!timer_pending(&hctx->ccid2hctx_rtotimer))
ccid2_start_rto_timer(sk);
- }
+
#ifdef CCID2_DEBUG
ccid2_pr_debug("pipe=%d\n", hctx->ccid2hctx_pipe);
ccid2_pr_debug("Sent: seq=%llu\n", seq);
@@ -320,7 +308,7 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, int len)
seqp->ccid2s_sent);
seqp = seqp->ccid2s_next;
}
- } while(0);
+ } while (0);
ccid2_pr_debug("=========\n");
ccid2_hc_tx_check_sanity(hctx);
#endif
@@ -378,7 +366,6 @@ static int ccid2_ackvector(struct sock *sk, struct sk_buff *skb, int offset,
*vec = value;
*veclen = len;
return offset + (opt_ptr - options);
- break;
}
}
@@ -416,13 +403,11 @@ static inline void ccid2_new_ack(struct sock *sk,
hctx->ccid2hctx_ssacks = 0;
*maxincr = *maxincr - 1;
}
- }
- /* increased cwnd enough for this single ack */
- else {
+ } else {
+ /* increased cwnd enough for this single ack */
hctx->ccid2hctx_ssacks = 0;
}
- }
- else {
+ } else {
hctx->ccid2hctx_ssacks = 0;
hctx->ccid2hctx_acks++;
@@ -444,8 +429,7 @@ static inline void ccid2_new_ack(struct sock *sk,
r, jiffies, seqp->ccid2s_seq);
hctx->ccid2hctx_srtt = r;
hctx->ccid2hctx_rttvar = r >> 1;
- }
- else {
+ } else {
/* RTTVAR */
long tmp = hctx->ccid2hctx_srtt - r;
if (tmp < 0)
@@ -528,12 +512,10 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
if (hctx->ccid2hctx_rpdupack == -1) {
hctx->ccid2hctx_rpdupack = 0;
hctx->ccid2hctx_rpseq = seqno;
- }
- else {
+ } else {
/* check if packet is consecutive */
- if ((hctx->ccid2hctx_rpseq + 1) == seqno) {
+ if ((hctx->ccid2hctx_rpseq + 1) == seqno)
hctx->ccid2hctx_rpseq++;
- }
/* it's a later packet */
else if (after48(seqno, hctx->ccid2hctx_rpseq)) {
hctx->ccid2hctx_rpdupack++;
@@ -541,7 +523,6 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
/* check if we got enough dupacks */
if (hctx->ccid2hctx_rpdupack >=
hctx->ccid2hctx_numdupack) {
-
hctx->ccid2hctx_rpdupack = -1; /* XXX lame */
hctx->ccid2hctx_rpseq = 0;
@@ -559,7 +540,6 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
case DCCP_PKT_ACK:
case DCCP_PKT_DATAACK:
break;
-
default:
return;
}
@@ -612,11 +592,9 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
if (state ==
DCCP_ACKVEC_STATE_ECN_MARKED) {
loss = 1;
- }
- else {
+ } else
ccid2_new_ack(sk, seqp,
&maxincr);
- }
seqp->ccid2s_acked = 1;
ccid2_pr_debug("Got ack for %llu\n",
@@ -648,13 +626,11 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
while (1) {
if (seqp->ccid2s_acked) {
done++;
- if (done == hctx->ccid2hctx_numdupack) {
+ if (done == hctx->ccid2hctx_numdupack)
break;
- }
}
- if (seqp == hctx->ccid2hctx_seqt) {
+ if (seqp == hctx->ccid2hctx_seqt)
break;
- }
seqp = seqp->ccid2s_prev;
}
@@ -798,6 +774,6 @@ static __exit void ccid2_module_exit(void)
module_exit(ccid2_module_exit);
MODULE_AUTHOR("Andrea Bittau <a.bittau@cs.ucl.ac.uk>");
-MODULE_DESCRIPTION("DCCP TCP CCID2 CCID");
+MODULE_DESCRIPTION("DCCP TCP-Like (CCID2) CCID");
MODULE_LICENSE("GPL");
MODULE_ALIAS("net-dccp-ccid-2");
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