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dccp ccid-3: Overhaul CCID naming convention 2/2 

This implements the new naming scheme also for CCID-3.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gerrit Renker 2009-10-05 00:53:11 +00:00 committed by David S. Miller
parent b1c00fe3cf
commit 388d5e9905
3 changed files with 213 additions and 238 deletions
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321
net/dccp/ccids/ccid3.c
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@ -65,13 +65,13 @@ static void ccid3_hc_tx_set_state(struct sock *sk,
enum ccid3_hc_tx_states state)
{
struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
enum ccid3_hc_tx_states oldstate = hctx->ccid3hctx_state;
enum ccid3_hc_tx_states oldstate = hctx->tx_state;
ccid3_pr_debug("%s(%p) %-8.8s -> %s\n",
dccp_role(sk), sk, ccid3_tx_state_name(oldstate),
ccid3_tx_state_name(state));
WARN_ON(state == oldstate);
hctx->ccid3hctx_state = state;
hctx->tx_state = state;
}
/*
@ -86,10 +86,9 @@ static void ccid3_hc_tx_set_state(struct sock *sk,
static inline u64 rfc3390_initial_rate(struct sock *sk)
{
const struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
const __u32 w_init = clamp_t(__u32, 4380U,
2 * hctx->ccid3hctx_s, 4 * hctx->ccid3hctx_s);
const __u32 w_init = clamp_t(__u32, 4380U, 2 * hctx->tx_s, 4 * hctx->tx_s);
return scaled_div(w_init << 6, hctx->ccid3hctx_rtt);
return scaled_div(w_init << 6, hctx->tx_rtt);
}
/*
@ -98,24 +97,20 @@ static inline u64 rfc3390_initial_rate(struct sock *sk)
static void ccid3_update_send_interval(struct ccid3_hc_tx_sock *hctx)
{
/* Calculate new t_ipi = s / X_inst (X_inst is in 64 * bytes/second) */
hctx->ccid3hctx_t_ipi = scaled_div32(((u64)hctx->ccid3hctx_s) << 6,
hctx->ccid3hctx_x);
hctx->tx_t_ipi = scaled_div32(((u64)hctx->tx_s) << 6, hctx->tx_x);
/* Calculate new delta by delta = min(t_ipi / 2, t_gran / 2) */
hctx->ccid3hctx_delta = min_t(u32, hctx->ccid3hctx_t_ipi / 2,
TFRC_OPSYS_HALF_TIME_GRAN);
ccid3_pr_debug("t_ipi=%u, delta=%u, s=%u, X=%u\n",
hctx->ccid3hctx_t_ipi, hctx->ccid3hctx_delta,
hctx->ccid3hctx_s, (unsigned)(hctx->ccid3hctx_x >> 6));
hctx->tx_delta = min_t(u32, hctx->tx_t_ipi / 2, TFRC_OPSYS_HALF_TIME_GRAN);
ccid3_pr_debug("t_ipi=%u, delta=%u, s=%u, X=%u\n", hctx->tx_t_ipi,
hctx->tx_delta, hctx->tx_s, (unsigned)(hctx->tx_x >> 6));
}
static u32 ccid3_hc_tx_idle_rtt(struct ccid3_hc_tx_sock *hctx, ktime_t now)
{
u32 delta = ktime_us_delta(now, hctx->ccid3hctx_t_last_win_count);
u32 delta = ktime_us_delta(now, hctx->tx_t_last_win_count);
return delta / hctx->ccid3hctx_rtt;
return delta / hctx->tx_rtt;
}
/**
@ -131,8 +126,8 @@ static u32 ccid3_hc_tx_idle_rtt(struct ccid3_hc_tx_sock *hctx, ktime_t now)
static void ccid3_hc_tx_update_x(struct sock *sk, ktime_t *stamp)
{
struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
__u64 min_rate = 2 * hctx->ccid3hctx_x_recv;
const __u64 old_x = hctx->ccid3hctx_x;
__u64 min_rate = 2 * hctx->tx_x_recv;
const __u64 old_x = hctx->tx_x;
ktime_t now = stamp ? *stamp : ktime_get_real();
/*
@ -143,33 +138,27 @@ static void ccid3_hc_tx_update_x(struct sock *sk, ktime_t *stamp)
*/
if (ccid3_hc_tx_idle_rtt(hctx, now) >= 2) {
min_rate = rfc3390_initial_rate(sk);
min_rate = max(min_rate, 2 * hctx->ccid3hctx_x_recv);
min_rate = max(min_rate, 2 * hctx->tx_x_recv);
}
if (hctx->ccid3hctx_p > 0) {
if (hctx->tx_p > 0) {
hctx->ccid3hctx_x = min(((__u64)hctx->ccid3hctx_x_calc) << 6,
min_rate);
hctx->ccid3hctx_x = max(hctx->ccid3hctx_x,
(((__u64)hctx->ccid3hctx_s) << 6) /
TFRC_T_MBI);
hctx->tx_x = min(((__u64)hctx->tx_x_calc) << 6, min_rate);
hctx->tx_x = max(hctx->tx_x, (((__u64)hctx->tx_s) << 6) / TFRC_T_MBI);
} else if (ktime_us_delta(now, hctx->ccid3hctx_t_ld)
- (s64)hctx->ccid3hctx_rtt >= 0) {
} else if (ktime_us_delta(now, hctx->tx_t_ld) - (s64)hctx->tx_rtt >= 0) {
hctx->ccid3hctx_x = min(2 * hctx->ccid3hctx_x, min_rate);
hctx->ccid3hctx_x = max(hctx->ccid3hctx_x,
scaled_div(((__u64)hctx->ccid3hctx_s) << 6,
hctx->ccid3hctx_rtt));
hctx->ccid3hctx_t_ld = now;
hctx->tx_x = min(2 * hctx->tx_x, min_rate);
hctx->tx_x = max(hctx->tx_x, scaled_div(((__u64)hctx->tx_s) << 6,
hctx->tx_rtt));
hctx->tx_t_ld = now;
}
if (hctx->ccid3hctx_x != old_x) {
if (hctx->tx_x != old_x) {
ccid3_pr_debug("X_prev=%u, X_now=%u, X_calc=%u, "
"X_recv=%u\n", (unsigned)(old_x >> 6),
(unsigned)(hctx->ccid3hctx_x >> 6),
hctx->ccid3hctx_x_calc,
(unsigned)(hctx->ccid3hctx_x_recv >> 6));
(unsigned)(hctx->tx_x >> 6), hctx->tx_x_calc,
(unsigned)(hctx->tx_x_recv >> 6));
ccid3_update_send_interval(hctx);
}
@ -181,11 +170,11 @@ static void ccid3_hc_tx_update_x(struct sock *sk, ktime_t *stamp)
*/
static inline void ccid3_hc_tx_update_s(struct ccid3_hc_tx_sock *hctx, int len)
{
const u16 old_s = hctx->ccid3hctx_s;
const u16 old_s = hctx->tx_s;
hctx->ccid3hctx_s = tfrc_ewma(hctx->ccid3hctx_s, len, 9);
hctx->tx_s = tfrc_ewma(hctx->tx_s, len, 9);
if (hctx->ccid3hctx_s != old_s)
if (hctx->tx_s != old_s)
ccid3_update_send_interval(hctx);
}
@ -196,13 +185,13 @@ static inline void ccid3_hc_tx_update_s(struct ccid3_hc_tx_sock *hctx, int len)
static inline void ccid3_hc_tx_update_win_count(struct ccid3_hc_tx_sock *hctx,
ktime_t now)
{
u32 delta = ktime_us_delta(now, hctx->ccid3hctx_t_last_win_count),
quarter_rtts = (4 * delta) / hctx->ccid3hctx_rtt;
u32 delta = ktime_us_delta(now, hctx->tx_t_last_win_count),
quarter_rtts = (4 * delta) / hctx->tx_rtt;
if (quarter_rtts > 0) {
hctx->ccid3hctx_t_last_win_count = now;
hctx->ccid3hctx_last_win_count += min(quarter_rtts, 5U);
hctx->ccid3hctx_last_win_count &= 0xF; /* mod 16 */
hctx->tx_t_last_win_count = now;
hctx->tx_last_win_count += min(quarter_rtts, 5U);
hctx->tx_last_win_count &= 0xF; /* mod 16 */
}
}
@ -220,23 +209,22 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
}
ccid3_pr_debug("%s(%p, state=%s) - entry \n", dccp_role(sk), sk,
ccid3_tx_state_name(hctx->ccid3hctx_state));
ccid3_tx_state_name(hctx->tx_state));
if (hctx->ccid3hctx_state == TFRC_SSTATE_FBACK)
if (hctx->tx_state == TFRC_SSTATE_FBACK)
ccid3_hc_tx_set_state(sk, TFRC_SSTATE_NO_FBACK);
else if (hctx->ccid3hctx_state != TFRC_SSTATE_NO_FBACK)
else if (hctx->tx_state != TFRC_SSTATE_NO_FBACK)
goto out;
/*
* Determine new allowed sending rate X as per draft rfc3448bis-00, 4.4
*/
if (hctx->ccid3hctx_t_rto == 0 || /* no feedback received yet */
hctx->ccid3hctx_p == 0) {
if (hctx->tx_t_rto == 0 || /* no feedback received yet */
hctx->tx_p == 0) {
/* halve send rate directly */
hctx->ccid3hctx_x = max(hctx->ccid3hctx_x / 2,
(((__u64)hctx->ccid3hctx_s) << 6) /
TFRC_T_MBI);
hctx->tx_x = max(hctx->tx_x / 2,
(((__u64)hctx->tx_s) << 6) / TFRC_T_MBI);
ccid3_update_send_interval(hctx);
} else {
/*
@ -249,33 +237,33 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
*
* Note that X_recv is scaled by 2^6 while X_calc is not
*/
BUG_ON(hctx->ccid3hctx_p && !hctx->ccid3hctx_x_calc);
BUG_ON(hctx->tx_p && !hctx->tx_x_calc);
if (hctx->ccid3hctx_x_calc > (hctx->ccid3hctx_x_recv >> 5))
hctx->ccid3hctx_x_recv =
max(hctx->ccid3hctx_x_recv / 2,
(((__u64)hctx->ccid3hctx_s) << 6) /
if (hctx->tx_x_calc > (hctx->tx_x_recv >> 5))
hctx->tx_x_recv =
max(hctx->tx_x_recv / 2,
(((__u64)hctx->tx_s) << 6) /
(2 * TFRC_T_MBI));
else {
hctx->ccid3hctx_x_recv = hctx->ccid3hctx_x_calc;
hctx->ccid3hctx_x_recv <<= 4;
hctx->tx_x_recv = hctx->tx_x_calc;
hctx->tx_x_recv <<= 4;
}
ccid3_hc_tx_update_x(sk, NULL);
}
ccid3_pr_debug("Reduced X to %llu/64 bytes/sec\n",
(unsigned long long)hctx->ccid3hctx_x);
(unsigned long long)hctx->tx_x);
/*
* Set new timeout for the nofeedback timer.
* See comments in packet_recv() regarding the value of t_RTO.
*/
if (unlikely(hctx->ccid3hctx_t_rto == 0)) /* no feedback yet */
if (unlikely(hctx->tx_t_rto == 0)) /* no feedback yet */
t_nfb = TFRC_INITIAL_TIMEOUT;
else
t_nfb = max(hctx->ccid3hctx_t_rto, 2 * hctx->ccid3hctx_t_ipi);
t_nfb = max(hctx->tx_t_rto, 2 * hctx->tx_t_ipi);
restart_timer:
sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
sk_reset_timer(sk, &hctx->tx_no_feedback_timer,
jiffies + usecs_to_jiffies(t_nfb));
out:
bh_unlock_sock(sk);
@ -303,18 +291,17 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
if (unlikely(skb->len == 0))
return -EBADMSG;
switch (hctx->ccid3hctx_state) {
switch (hctx->tx_state) {
case TFRC_SSTATE_NO_SENT:
sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
(jiffies +
sk_reset_timer(sk, &hctx->tx_no_feedback_timer, (jiffies +
usecs_to_jiffies(TFRC_INITIAL_TIMEOUT)));
hctx->ccid3hctx_last_win_count = 0;
hctx->ccid3hctx_t_last_win_count = now;
hctx->tx_last_win_count = 0;
hctx->tx_t_last_win_count = now;
/* Set t_0 for initial packet */
hctx->ccid3hctx_t_nom = now;
hctx->tx_t_nom = now;
hctx->ccid3hctx_s = skb->len;
hctx->tx_s = skb->len;
/*
* Use initial RTT sample when available: recommended by erratum
@ -323,9 +310,9 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
*/
if (dp->dccps_syn_rtt) {
ccid3_pr_debug("SYN RTT = %uus\n", dp->dccps_syn_rtt);
hctx->ccid3hctx_rtt = dp->dccps_syn_rtt;
hctx->ccid3hctx_x = rfc3390_initial_rate(sk);
hctx->ccid3hctx_t_ld = now;
hctx->tx_rtt = dp->dccps_syn_rtt;
hctx->tx_x = rfc3390_initial_rate(sk);
hctx->tx_t_ld = now;
} else {
/*
* Sender does not have RTT sample:
@ -333,9 +320,9 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
* is needed in several parts (e.g. window counter);
* - set sending rate X_pps = 1pps as per RFC 3448, 4.2.
*/
hctx->ccid3hctx_rtt = DCCP_FALLBACK_RTT;
hctx->ccid3hctx_x = hctx->ccid3hctx_s;
hctx->ccid3hctx_x <<= 6;
hctx->tx_rtt = DCCP_FALLBACK_RTT;
hctx->tx_x = hctx->tx_s;
hctx->tx_x <<= 6;
}
ccid3_update_send_interval(hctx);
@ -343,7 +330,7 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
break;
case TFRC_SSTATE_NO_FBACK:
case TFRC_SSTATE_FBACK:
delay = ktime_us_delta(hctx->ccid3hctx_t_nom, now);
delay = ktime_us_delta(hctx->tx_t_nom, now);
ccid3_pr_debug("delay=%ld\n", (long)delay);
/*
* Scheduling of packet transmissions [RFC 3448, 4.6]
@ -353,7 +340,7 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
* else
* // send the packet in (t_nom - t_now) milliseconds.
*/
if (delay - (s64)hctx->ccid3hctx_delta >= 1000)
if (delay - (s64)hctx->tx_delta >= 1000)
return (u32)delay / 1000L;
ccid3_hc_tx_update_win_count(hctx, now);
@ -365,11 +352,10 @@ static int ccid3_hc_tx_send_packet(struct sock *sk, struct sk_buff *skb)
/* prepare to send now (add options etc.) */
dp->dccps_hc_tx_insert_options = 1;
DCCP_SKB_CB(skb)->dccpd_ccval = hctx->ccid3hctx_last_win_count;
DCCP_SKB_CB(skb)->dccpd_ccval = hctx->tx_last_win_count;
/* set the nominal send time for the next following packet */
hctx->ccid3hctx_t_nom = ktime_add_us(hctx->ccid3hctx_t_nom,
hctx->ccid3hctx_t_ipi);
hctx->tx_t_nom = ktime_add_us(hctx->tx_t_nom, hctx->tx_t_ipi);
return 0;
}
@ -380,7 +366,7 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more,
ccid3_hc_tx_update_s(hctx, len);
if (tfrc_tx_hist_add(&hctx->ccid3hctx_hist, dccp_sk(sk)->dccps_gss))
if (tfrc_tx_hist_add(&hctx->tx_hist, dccp_sk(sk)->dccps_gss))
DCCP_CRIT("packet history - out of memory!");
}
@ -397,15 +383,15 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_DATAACK))
return;
/* ... and only in the established state */
if (hctx->ccid3hctx_state != TFRC_SSTATE_FBACK &&
hctx->ccid3hctx_state != TFRC_SSTATE_NO_FBACK)
if (hctx->tx_state != TFRC_SSTATE_FBACK &&
hctx->tx_state != TFRC_SSTATE_NO_FBACK)
return;
opt_recv = &hctx->ccid3hctx_options_received;
opt_recv = &hctx->tx_options_received;
now = ktime_get_real();
/* Estimate RTT from history if ACK number is valid */
r_sample = tfrc_tx_hist_rtt(hctx->ccid3hctx_hist,
r_sample = tfrc_tx_hist_rtt(hctx->tx_hist,
DCCP_SKB_CB(skb)->dccpd_ack_seq, now);
if (r_sample == 0) {
DCCP_WARN("%s(%p): %s with bogus ACK-%llu\n", dccp_role(sk), sk,
@ -415,37 +401,37 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
}
/* Update receive rate in units of 64 * bytes/second */
hctx->ccid3hctx_x_recv = opt_recv->ccid3or_receive_rate;
hctx->ccid3hctx_x_recv <<= 6;
hctx->tx_x_recv = opt_recv->ccid3or_receive_rate;
hctx->tx_x_recv <<= 6;
/* Update loss event rate (which is scaled by 1e6) */
pinv = opt_recv->ccid3or_loss_event_rate;
if (pinv == ~0U || pinv == 0) /* see RFC 4342, 8.5 */
hctx->ccid3hctx_p = 0;
hctx->tx_p = 0;
else /* can not exceed 100% */
hctx->ccid3hctx_p = scaled_div(1, pinv);
hctx->tx_p = scaled_div(1, pinv);
/*
* Validate new RTT sample and update moving average
*/
r_sample = dccp_sample_rtt(sk, r_sample);
hctx->ccid3hctx_rtt = tfrc_ewma(hctx->ccid3hctx_rtt, r_sample, 9);
hctx->tx_rtt = tfrc_ewma(hctx->tx_rtt, r_sample, 9);
/*
* Update allowed sending rate X as per draft rfc3448bis-00, 4.2/3
*/
if (hctx->ccid3hctx_state == TFRC_SSTATE_NO_FBACK) {
if (hctx->tx_state == TFRC_SSTATE_NO_FBACK) {
ccid3_hc_tx_set_state(sk, TFRC_SSTATE_FBACK);
if (hctx->ccid3hctx_t_rto == 0) {
if (hctx->tx_t_rto == 0) {
/*
* Initial feedback packet: Larger Initial Windows (4.2)
*/
hctx->ccid3hctx_x = rfc3390_initial_rate(sk);
hctx->ccid3hctx_t_ld = now;
hctx->tx_x = rfc3390_initial_rate(sk);
hctx->tx_t_ld = now;
ccid3_update_send_interval(hctx);
goto done_computing_x;
} else if (hctx->ccid3hctx_p == 0) {
} else if (hctx->tx_p == 0) {
/*
* First feedback after nofeedback timer expiry (4.3)
*/
@ -454,25 +440,20 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
}
/* Update sending rate (step 4 of [RFC 3448, 4.3]) */
if (hctx->ccid3hctx_p > 0)
hctx->ccid3hctx_x_calc =
tfrc_calc_x(hctx->ccid3hctx_s,
hctx->ccid3hctx_rtt,
hctx->ccid3hctx_p);
if (hctx->tx_p > 0)
hctx->tx_x_calc = tfrc_calc_x(hctx->tx_s, hctx->tx_rtt, hctx->tx_p);
ccid3_hc_tx_update_x(sk, &now);
done_computing_x:
ccid3_pr_debug("%s(%p), RTT=%uus (sample=%uus), s=%u, "
"p=%u, X_calc=%u, X_recv=%u, X=%u\n",
dccp_role(sk),
sk, hctx->ccid3hctx_rtt, r_sample,
hctx->ccid3hctx_s, hctx->ccid3hctx_p,
hctx->ccid3hctx_x_calc,
(unsigned)(hctx->ccid3hctx_x_recv >> 6),
(unsigned)(hctx->ccid3hctx_x >> 6));
dccp_role(sk), sk, hctx->tx_rtt, r_sample,
hctx->tx_s, hctx->tx_p, hctx->tx_x_calc,
(unsigned)(hctx->tx_x_recv >> 6),
(unsigned)(hctx->tx_x >> 6));
/* unschedule no feedback timer */
sk_stop_timer(sk, &hctx->ccid3hctx_no_feedback_timer);
sk_stop_timer(sk, &hctx->tx_no_feedback_timer);
/*
* As we have calculated new ipi, delta, t_nom it is possible
@ -486,21 +467,19 @@ done_computing_x:
* This can help avoid triggering the nofeedback timer too
* often ('spinning') on LANs with small RTTs.
*/
hctx->ccid3hctx_t_rto = max_t(u32, 4 * hctx->ccid3hctx_rtt,
(CONFIG_IP_DCCP_CCID3_RTO *
(USEC_PER_SEC / 1000)));
hctx->tx_t_rto = max_t(u32, 4 * hctx->tx_rtt, (CONFIG_IP_DCCP_CCID3_RTO *
(USEC_PER_SEC / 1000)));
/*
* Schedule no feedback timer to expire in
* max(t_RTO, 2 * s/X) = max(t_RTO, 2 * t_ipi)
*/
t_nfb = max(hctx->ccid3hctx_t_rto, 2 * hctx->ccid3hctx_t_ipi);
t_nfb = max(hctx->tx_t_rto, 2 * hctx->tx_t_ipi);
ccid3_pr_debug("%s(%p), Scheduled no feedback timer to "
"expire in %lu jiffies (%luus)\n",
dccp_role(sk),
sk, usecs_to_jiffies(t_nfb), t_nfb);
dccp_role(sk), sk, usecs_to_jiffies(t_nfb), t_nfb);
sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
sk_reset_timer(sk, &hctx->tx_no_feedback_timer,
jiffies + usecs_to_jiffies(t_nfb));
}
@ -514,7 +493,7 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
struct ccid3_options_received *opt_recv;
__be32 opt_val;
opt_recv = &hctx->ccid3hctx_options_received;
opt_recv = &hctx->tx_options_received;
if (opt_recv->ccid3or_seqno != dp->dccps_gsr) {
opt_recv->ccid3or_seqno = dp->dccps_gsr;
@ -570,11 +549,10 @@ static int ccid3_hc_tx_init(struct ccid *ccid, struct sock *sk)
{
struct ccid3_hc_tx_sock *hctx = ccid_priv(ccid);
hctx->ccid3hctx_state = TFRC_SSTATE_NO_SENT;
hctx->ccid3hctx_hist = NULL;
setup_timer(&hctx->ccid3hctx_no_feedback_timer,
hctx->tx_state = TFRC_SSTATE_NO_SENT;
hctx->tx_hist = NULL;
setup_timer(&hctx->tx_no_feedback_timer,
ccid3_hc_tx_no_feedback_timer, (unsigned long)sk);
return 0;
}
@ -583,9 +561,9 @@ static void ccid3_hc_tx_exit(struct sock *sk)
struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
ccid3_hc_tx_set_state(sk, TFRC_SSTATE_TERM);
sk_stop_timer(sk, &hctx->ccid3hctx_no_feedback_timer);
sk_stop_timer(sk, &hctx->tx_no_feedback_timer);
tfrc_tx_hist_purge(&hctx->ccid3hctx_hist);
tfrc_tx_hist_purge(&hctx->tx_hist);
}
static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
@ -597,8 +575,8 @@ static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
return;
hctx = ccid3_hc_tx_sk(sk);
info->tcpi_rto = hctx->ccid3hctx_t_rto;
info->tcpi_rtt = hctx->ccid3hctx_rtt;
info->tcpi_rto = hctx->tx_t_rto;
info->tcpi_rtt = hctx->tx_rtt;
}
static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len,
@ -614,10 +592,10 @@ static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len,
hctx = ccid3_hc_tx_sk(sk);
switch (optname) {
case DCCP_SOCKOPT_CCID_TX_INFO:
if (len < sizeof(hctx->ccid3hctx_tfrc))
if (len < sizeof(hctx->tx_tfrc))
return -EINVAL;
len = sizeof(hctx->ccid3hctx_tfrc);
val = &hctx->ccid3hctx_tfrc;
len = sizeof(hctx->tx_tfrc);
val = &hctx->tx_tfrc;
break;
default:
return -ENOPROTOOPT;
@ -658,13 +636,13 @@ static void ccid3_hc_rx_set_state(struct sock *sk,
enum ccid3_hc_rx_states state)
{
struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
enum ccid3_hc_rx_states oldstate = hcrx->ccid3hcrx_state;
enum ccid3_hc_rx_states oldstate = hcrx->rx_state;
ccid3_pr_debug("%s(%p) %-8.8s -> %s\n",
dccp_role(sk), sk, ccid3_rx_state_name(oldstate),
ccid3_rx_state_name(state));
WARN_ON(state == oldstate);
hcrx->ccid3hcrx_state = state;
hcrx->rx_state = state;
}
static void ccid3_hc_rx_send_feedback(struct sock *sk,
@ -676,15 +654,15 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk,
ktime_t now;
s64 delta = 0;
if (unlikely(hcrx->ccid3hcrx_state == TFRC_RSTATE_TERM))
if (unlikely(hcrx->rx_state == TFRC_RSTATE_TERM))
return;
now = ktime_get_real();
switch (fbtype) {
case CCID3_FBACK_INITIAL:
hcrx->ccid3hcrx_x_recv = 0;
hcrx->ccid3hcrx_pinv = ~0U; /* see RFC 4342, 8.5 */
hcrx->rx_x_recv = 0;
hcrx->rx_pinv = ~0U; /* see RFC 4342, 8.5 */
break;
case CCID3_FBACK_PARAM_CHANGE:
/*
@ -697,27 +675,26 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk,
* the number of bytes since last feedback.
* This is a safe fallback, since X is bounded above by X_calc.
*/
if (hcrx->ccid3hcrx_x_recv > 0)
if (hcrx->rx_x_recv > 0)
break;
/* fall through */
case CCID3_FBACK_PERIODIC:
delta = ktime_us_delta(now, hcrx->ccid3hcrx_tstamp_last_feedback);
delta = ktime_us_delta(now, hcrx->rx_tstamp_last_feedback);
if (delta <= 0)
DCCP_BUG("delta (%ld) <= 0", (long)delta);
else
hcrx->ccid3hcrx_x_recv =
scaled_div32(hcrx->ccid3hcrx_bytes_recv, delta);
hcrx->rx_x_recv = scaled_div32(hcrx->rx_bytes_recv, delta);
break;
default:
return;
}
ccid3_pr_debug("Interval %ldusec, X_recv=%u, 1/p=%u\n", (long)delta,
hcrx->ccid3hcrx_x_recv, hcrx->ccid3hcrx_pinv);
hcrx->rx_x_recv, hcrx->rx_pinv);
hcrx->ccid3hcrx_tstamp_last_feedback = now;
hcrx->ccid3hcrx_last_counter = dccp_hdr(skb)->dccph_ccval;
hcrx->ccid3hcrx_bytes_recv = 0;
hcrx->rx_tstamp_last_feedback = now;
hcrx->rx_last_counter = dccp_hdr(skb)->dccph_ccval;
hcrx->rx_bytes_recv = 0;
dp->dccps_hc_rx_insert_options = 1;
dccp_send_ack(sk);
@ -736,8 +713,8 @@ static int ccid3_hc_rx_insert_options(struct sock *sk, struct sk_buff *skb)
if (dccp_packet_without_ack(skb))
return 0;
x_recv = htonl(hcrx->ccid3hcrx_x_recv);
pinv = htonl(hcrx->ccid3hcrx_pinv);
x_recv = htonl(hcrx->rx_x_recv);
pinv = htonl(hcrx->rx_pinv);
if (dccp_insert_option(sk, skb, TFRC_OPT_LOSS_EVENT_RATE,
&pinv, sizeof(pinv)) ||
@ -764,22 +741,22 @@ static u32 ccid3_first_li(struct sock *sk)
u32 x_recv, p, delta;
u64 fval;
if (hcrx->ccid3hcrx_rtt == 0) {
if (hcrx->rx_rtt == 0) {
DCCP_WARN("No RTT estimate available, using fallback RTT\n");
hcrx->ccid3hcrx_rtt = DCCP_FALLBACK_RTT;
hcrx->rx_rtt = DCCP_FALLBACK_RTT;
}
delta = ktime_to_us(net_timedelta(hcrx->ccid3hcrx_tstamp_last_feedback));
x_recv = scaled_div32(hcrx->ccid3hcrx_bytes_recv, delta);
delta = ktime_to_us(net_timedelta(hcrx->rx_tstamp_last_feedback));
x_recv = scaled_div32(hcrx->rx_bytes_recv, delta);
if (x_recv == 0) { /* would also trigger divide-by-zero */
DCCP_WARN("X_recv==0\n");
if ((x_recv = hcrx->ccid3hcrx_x_recv) == 0) {
if ((x_recv = hcrx->rx_x_recv) == 0) {
DCCP_BUG("stored value of X_recv is zero");
return ~0U;
}
}
fval = scaled_div(hcrx->ccid3hcrx_s, hcrx->ccid3hcrx_rtt);
fval = scaled_div(hcrx->rx_s, hcrx->rx_rtt);
fval = scaled_div32(fval, x_recv);
p = tfrc_calc_x_reverse_lookup(fval);
@ -796,14 +773,14 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
const u64 ndp = dccp_sk(sk)->dccps_options_received.dccpor_ndp;
const bool is_data_packet = dccp_data_packet(skb);
if (unlikely(hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA)) {
if (unlikely(hcrx->rx_state == TFRC_RSTATE_NO_DATA)) {
if (is_data_packet) {
const u32 payload = skb->len - dccp_hdr(skb)->dccph_doff * 4;
do_feedback = CCID3_FBACK_INITIAL;
ccid3_hc_rx_set_state(sk, TFRC_RSTATE_DATA);
hcrx->ccid3hcrx_s = payload;
hcrx->rx_s = payload;
/*
* Not necessary to update ccid3hcrx_bytes_recv here,
* Not necessary to update rx_bytes_recv here,
* since X_recv = 0 for the first feedback packet (cf.
* RFC 3448, 6.3) -- gerrit
*/
@ -811,7 +788,7 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
goto update_records;
}
if (tfrc_rx_hist_duplicate(&hcrx->ccid3hcrx_hist, skb))
if (tfrc_rx_hist_duplicate(&hcrx->rx_hist, skb))
return; /* done receiving */
if (is_data_packet) {
@ -819,20 +796,20 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
/*
* Update moving-average of s and the sum of received payload bytes
*/
hcrx->ccid3hcrx_s = tfrc_ewma(hcrx->ccid3hcrx_s, payload, 9);
hcrx->ccid3hcrx_bytes_recv += payload;
hcrx->rx_s = tfrc_ewma(hcrx->rx_s, payload, 9);
hcrx->rx_bytes_recv += payload;
}
/*
* Perform loss detection and handle pending losses
*/
if (tfrc_rx_handle_loss(&hcrx->ccid3hcrx_hist, &hcrx->ccid3hcrx_li_hist,
if (tfrc_rx_handle_loss(&hcrx->rx_hist, &hcrx->rx_li_hist,
skb, ndp, ccid3_first_li, sk)) {
do_feedback = CCID3_FBACK_PARAM_CHANGE;
goto done_receiving;
}
if (tfrc_rx_hist_loss_pending(&hcrx->ccid3hcrx_hist))
if (tfrc_rx_hist_loss_pending(&hcrx->rx_hist))
return; /* done receiving */
/*
@ -841,17 +818,17 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
if (unlikely(!is_data_packet))
goto update_records;
if (!tfrc_lh_is_initialised(&hcrx->ccid3hcrx_li_hist)) {
const u32 sample = tfrc_rx_hist_sample_rtt(&hcrx->ccid3hcrx_hist, skb);
if (!tfrc_lh_is_initialised(&hcrx->rx_li_hist)) {
const u32 sample = tfrc_rx_hist_sample_rtt(&hcrx->rx_hist, skb);
/*
* Empty loss history: no loss so far, hence p stays 0.
* Sample RTT values, since an RTT estimate is required for the
* computation of p when the first loss occurs; RFC 3448, 6.3.1.
*/
if (sample != 0)
hcrx->ccid3hcrx_rtt = tfrc_ewma(hcrx->ccid3hcrx_rtt, sample, 9);
hcrx->rx_rtt = tfrc_ewma(hcrx->rx_rtt, sample, 9);
} else if (tfrc_lh_update_i_mean(&hcrx->ccid3hcrx_li_hist, skb)) {
} else if (tfrc_lh_update_i_mean(&hcrx->rx_li_hist, skb)) {
/*
* Step (3) of [RFC 3448, 6.1]: Recompute I_mean and, if I_mean
* has decreased (resp. p has increased), send feedback now.
@ -862,11 +839,11 @@ static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
/*
* Check if the periodic once-per-RTT feedback is due; RFC 4342, 10.3
*/
if (SUB16(dccp_hdr(skb)->dccph_ccval, hcrx->ccid3hcrx_last_counter) > 3)
if (SUB16(dccp_hdr(skb)->dccph_ccval, hcrx->rx_last_counter) > 3)
do_feedback = CCID3_FBACK_PERIODIC;
update_records:
tfrc_rx_hist_add_packet(&hcrx->ccid3hcrx_hist, skb, ndp);
tfrc_rx_hist_add_packet(&hcrx->rx_hist, skb, ndp);
done_receiving:
if (do_feedback)
@ -877,9 +854,9 @@ static int ccid3_hc_rx_init(struct ccid *ccid, struct sock *sk)
{
struct ccid3_hc_rx_sock *hcrx = ccid_priv(ccid);
hcrx->ccid3hcrx_state = TFRC_RSTATE_NO_DATA;
tfrc_lh_init(&hcrx->ccid3hcrx_li_hist);
return tfrc_rx_hist_alloc(&hcrx->ccid3hcrx_hist);
hcrx->rx_state = TFRC_RSTATE_NO_DATA;
tfrc_lh_init(&hcrx->rx_li_hist);
return tfrc_rx_hist_alloc(&hcrx->rx_hist);
}
static void ccid3_hc_rx_exit(struct sock *sk)
@ -888,8 +865,8 @@ static void ccid3_hc_rx_exit(struct sock *sk)
ccid3_hc_rx_set_state(sk, TFRC_RSTATE_TERM);
tfrc_rx_hist_purge(&hcrx->ccid3hcrx_hist);
tfrc_lh_cleanup(&hcrx->ccid3hcrx_li_hist);
tfrc_rx_hist_purge(&hcrx->rx_hist);
tfrc_lh_cleanup(&hcrx->rx_li_hist);
}
static void ccid3_hc_rx_get_info(struct sock *sk, struct tcp_info *info)
@ -901,9 +878,9 @@ static void ccid3_hc_rx_get_info(struct sock *sk, struct tcp_info *info)
return;
hcrx = ccid3_hc_rx_sk(sk);
info->tcpi_ca_state = hcrx->ccid3hcrx_state;
info->tcpi_ca_state = hcrx->rx_state;
info->tcpi_options |= TCPI_OPT_TIMESTAMPS;
info->tcpi_rcv_rtt = hcrx->ccid3hcrx_rtt;
info->tcpi_rcv_rtt = hcrx->rx_rtt;
}
static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
@ -922,10 +899,10 @@ static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
case DCCP_SOCKOPT_CCID_RX_INFO:
if (len < sizeof(rx_info))
return -EINVAL;
rx_info.tfrcrx_x_recv = hcrx->ccid3hcrx_x_recv;
rx_info.tfrcrx_rtt = hcrx->ccid3hcrx_rtt;
rx_info.tfrcrx_p = hcrx->ccid3hcrx_pinv == 0 ? ~0U :
scaled_div(1, hcrx->ccid3hcrx_pinv);
rx_info.tfrcrx_x_recv = hcrx->rx_x_recv;
rx_info.tfrcrx_rtt = hcrx->rx_rtt;
rx_info.tfrcrx_p = hcrx->rx_pinv == 0 ? ~0U :
scaled_div(1, hcrx->rx_pinv);
len = sizeof(rx_info);
val = &rx_info;
break;

120
net/dccp/ccids/ccid3.h
View File

@ -75,44 +75,44 @@ enum ccid3_hc_tx_states {
/**
* struct ccid3_hc_tx_sock - CCID3 sender half-connection socket
* @ccid3hctx_x - Current sending rate in 64 * bytes per second
* @ccid3hctx_x_recv - Receive rate in 64 * bytes per second
* @ccid3hctx_x_calc - Calculated rate in bytes per second
* @ccid3hctx_rtt - Estimate of current round trip time in usecs
* @ccid3hctx_p - Current loss event rate (0-1) scaled by 1000000
* @ccid3hctx_s - Packet size in bytes
* @ccid3hctx_t_rto - Nofeedback Timer setting in usecs
* @ccid3hctx_t_ipi - Interpacket (send) interval (RFC 3448, 4.6) in usecs
* @ccid3hctx_state - Sender state, one of %ccid3_hc_tx_states
* @ccid3hctx_last_win_count - Last window counter sent
* @ccid3hctx_t_last_win_count - Timestamp of earliest packet
* with last_win_count value sent
* @ccid3hctx_no_feedback_timer - Handle to no feedback timer
* @ccid3hctx_t_ld - Time last doubled during slow start
* @ccid3hctx_t_nom - Nominal send time of next packet
* @ccid3hctx_delta - Send timer delta (RFC 3448, 4.6) in usecs
* @ccid3hctx_hist - Packet history
* @ccid3hctx_options_received - Parsed set of retrieved options
* @tx_x: Current sending rate in 64 * bytes per second
* @tx_x_recv: Receive rate in 64 * bytes per second
* @tx_x_calc: Calculated rate in bytes per second
* @tx_rtt: Estimate of current round trip time in usecs
* @tx_p: Current loss event rate (0-1) scaled by 1000000
* @tx_s: Packet size in bytes
* @tx_t_rto: Nofeedback Timer setting in usecs
* @tx_t_ipi: Interpacket (send) interval (RFC 3448, 4.6) in usecs
* @tx_state: Sender state, one of %ccid3_hc_tx_states
* @tx_last_win_count: Last window counter sent
* @tx_t_last_win_count: Timestamp of earliest packet
* with last_win_count value sent
* @tx_no_feedback_timer: Handle to no feedback timer
* @tx_t_ld: Time last doubled during slow start
* @tx_t_nom: Nominal send time of next packet
* @tx_delta: Send timer delta (RFC 3448, 4.6) in usecs
* @tx_hist: Packet history
* @tx_options_received: Parsed set of retrieved options
*/
struct ccid3_hc_tx_sock {
struct tfrc_tx_info ccid3hctx_tfrc;
#define ccid3hctx_x ccid3hctx_tfrc.tfrctx_x
#define ccid3hctx_x_recv ccid3hctx_tfrc.tfrctx_x_recv
#define ccid3hctx_x_calc ccid3hctx_tfrc.tfrctx_x_calc
#define ccid3hctx_rtt ccid3hctx_tfrc.tfrctx_rtt
#define ccid3hctx_p ccid3hctx_tfrc.tfrctx_p
#define ccid3hctx_t_rto ccid3hctx_tfrc.tfrctx_rto
#define ccid3hctx_t_ipi ccid3hctx_tfrc.tfrctx_ipi
u16 ccid3hctx_s;
enum ccid3_hc_tx_states ccid3hctx_state:8;
u8 ccid3hctx_last_win_count;
ktime_t ccid3hctx_t_last_win_count;
struct timer_list ccid3hctx_no_feedback_timer;
ktime_t ccid3hctx_t_ld;
ktime_t ccid3hctx_t_nom;
u32 ccid3hctx_delta;
struct tfrc_tx_hist_entry *ccid3hctx_hist;
struct ccid3_options_received ccid3hctx_options_received;
struct tfrc_tx_info tx_tfrc;
#define tx_x tx_tfrc.tfrctx_x
#define tx_x_recv tx_tfrc.tfrctx_x_recv
#define tx_x_calc tx_tfrc.tfrctx_x_calc
#define tx_rtt tx_tfrc.tfrctx_rtt
#define tx_p tx_tfrc.tfrctx_p
#define tx_t_rto tx_tfrc.tfrctx_rto
#define tx_t_ipi tx_tfrc.tfrctx_ipi
u16 tx_s;
enum ccid3_hc_tx_states tx_state:8;
u8 tx_last_win_count;
ktime_t tx_t_last_win_count;
struct timer_list tx_no_feedback_timer;
ktime_t tx_t_ld;
ktime_t tx_t_nom;
u32 tx_delta;
struct tfrc_tx_hist_entry *tx_hist;
struct ccid3_options_received tx_options_received;
};
static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk)
@ -131,32 +131,32 @@ enum ccid3_hc_rx_states {
/**
* struct ccid3_hc_rx_sock - CCID3 receiver half-connection socket
* @ccid3hcrx_x_recv - Receiver estimate of send rate (RFC 3448 4.3)
* @ccid3hcrx_rtt - Receiver estimate of rtt (non-standard)
* @ccid3hcrx_p - Current loss event rate (RFC 3448 5.4)
* @ccid3hcrx_last_counter - Tracks window counter (RFC 4342, 8.1)
* @ccid3hcrx_state - Receiver state, one of %ccid3_hc_rx_states
* @ccid3hcrx_bytes_recv - Total sum of DCCP payload bytes
* @ccid3hcrx_x_recv - Receiver estimate of send rate (RFC 3448, sec. 4.3)
* @ccid3hcrx_rtt - Receiver estimate of RTT
* @ccid3hcrx_tstamp_last_feedback - Time at which last feedback was sent
* @ccid3hcrx_tstamp_last_ack - Time at which last feedback was sent
* @ccid3hcrx_hist - Packet history (loss detection + RTT sampling)
* @ccid3hcrx_li_hist - Loss Interval database
* @ccid3hcrx_s - Received packet size in bytes
* @ccid3hcrx_pinv - Inverse of Loss Event Rate (RFC 4342, sec. 8.5)
* @rx_x_recv: Receiver estimate of send rate (RFC 3448 4.3)
* @rx_rtt: Receiver estimate of rtt (non-standard)
* @rx_p: Current loss event rate (RFC 3448 5.4)
* @rx_last_counter: Tracks window counter (RFC 4342, 8.1)
* @rx_state: Receiver state, one of %ccid3_hc_rx_states
* @rx_bytes_recv: Total sum of DCCP payload bytes
* @rx_x_recv: Receiver estimate of send rate (RFC 3448, sec. 4.3)
* @rx_rtt: Receiver estimate of RTT
* @rx_tstamp_last_feedback: Time at which last feedback was sent
* @rx_tstamp_last_ack: Time at which last feedback was sent
* @rx_hist: Packet history (loss detection + RTT sampling)
* @rx_li_hist: Loss Interval database
* @rx_s: Received packet size in bytes
* @rx_pinv: Inverse of Loss Event Rate (RFC 4342, sec. 8.5)
*/
struct ccid3_hc_rx_sock {
u8 ccid3hcrx_last_counter:4;
enum ccid3_hc_rx_states ccid3hcrx_state:8;
u32 ccid3hcrx_bytes_recv;
u32 ccid3hcrx_x_recv;
u32 ccid3hcrx_rtt;
ktime_t ccid3hcrx_tstamp_last_feedback;
struct tfrc_rx_hist ccid3hcrx_hist;
struct tfrc_loss_hist ccid3hcrx_li_hist;
u16 ccid3hcrx_s;
#define ccid3hcrx_pinv ccid3hcrx_li_hist.i_mean
u8 rx_last_counter:4;
enum ccid3_hc_rx_states rx_state:8;
u32 rx_bytes_recv;
u32 rx_x_recv;
u32 rx_rtt;
ktime_t rx_tstamp_last_feedback;
struct tfrc_rx_hist rx_hist;
struct tfrc_loss_hist rx_li_hist;
u16 rx_s;
#define rx_pinv rx_li_hist.i_mean
};
static inline struct ccid3_hc_rx_sock *ccid3_hc_rx_sk(const struct sock *sk)

10
net/dccp/probe.c
View File

@ -83,14 +83,12 @@ static int jdccp_sendmsg(struct kiocb *iocb, struct sock *sk,
if (port == 0 || ntohs(inet->dport) == port ||
ntohs(inet->sport) == port) {
if (hctx)
printl("%pI4:%u %pI4:%u %d %d %d %d %u "
"%llu %llu %d\n",
printl("%pI4:%u %pI4:%u %d %d %d %d %u %llu %llu %d\n",
&inet->saddr, ntohs(inet->sport),
&inet->daddr, ntohs(inet->dport), size,
hctx->ccid3hctx_s, hctx->ccid3hctx_rtt,
hctx->ccid3hctx_p, hctx->ccid3hctx_x_calc,
hctx->ccid3hctx_x_recv >> 6,
hctx->ccid3hctx_x >> 6, hctx->ccid3hctx_t_ipi);
hctx->tx_s, hctx->tx_rtt, hctx->tx_p,
hctx->tx_x_calc, hctx->tx_x_recv >> 6,
hctx->tx_x >> 6, hctx->tx_t_ipi);
else
printl("%pI4:%u %pI4:%u %d\n",
&inet->saddr, ntohs(inet->sport),