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dccp ccid-3: Remove redundant 'options_received' struct

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The `options_received' struct is redundant, since it re-duplicates the existing
`p' and `x_recv' fields. This patch removes the sub-struct and migrates the
format conversion operations to ccid3_hc_tx_parse_options().

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
This commit is contained in:
Gerrit Renker 2010-09-19 20:14:23 +02:00
parent 792e6d3389
commit 536bb20b45
2 changed files with 8 additions and 23 deletions
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24
net/dccp/ccids/ccid3.c
View File

@ -365,11 +365,10 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more,
static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
{
struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
struct ccid3_options_received *opt_recv = &hc->tx_options_received;
struct tfrc_tx_hist_entry *acked;
ktime_t now;
unsigned long t_nfb;
u32 pinv, r_sample;
u32 r_sample;
/* we are only interested in ACKs */
if (!(DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_ACK ||
@ -394,17 +393,6 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
r_sample = dccp_sample_rtt(sk, ktime_us_delta(now, acked->stamp));
hc->tx_rtt = tfrc_ewma(hc->tx_rtt, r_sample, 9);
/* Update receive rate in units of 64 * bytes/second */
hc->tx_x_recv = opt_recv->ccid3or_receive_rate;
hc->tx_x_recv <<= 6;
/* Update loss event rate (which is scaled by 1e6) */
pinv = opt_recv->ccid3or_loss_event_rate;
if (pinv == 0)
hc->tx_p = 0;
else
hc->tx_p = tfrc_invert_loss_event_rate(pinv);
/*
* Update allowed sending rate X as per draft rfc3448bis-00, 4.2/3
*/
@ -476,7 +464,6 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, u8 packet_type,
u8 option, u8 *optval, u8 optlen)
{
struct ccid3_hc_tx_sock *hc = ccid3_hc_tx_sk(sk);
struct ccid3_options_received *opt_recv = &hc->tx_options_received;
__be32 opt_val;
switch (option) {
@ -493,11 +480,16 @@ static int ccid3_hc_tx_parse_options(struct sock *sk, u8 packet_type,
opt_val = ntohl(get_unaligned((__be32 *)optval));
if (option == TFRC_OPT_RECEIVE_RATE) {
opt_recv->ccid3or_receive_rate = opt_val;
/* Receive Rate is kept in units of 64 bytes/second */
hc->tx_x_recv = opt_val;
hc->tx_x_recv <<= 6;
ccid3_pr_debug("%s(%p), RECEIVE_RATE=%u\n",
dccp_role(sk), sk, opt_val);
} else {
opt_recv->ccid3or_loss_event_rate = opt_val;
/* Update the fixpoint Loss Event Rate fraction */
hc->tx_p = tfrc_invert_loss_event_rate(opt_val);
ccid3_pr_debug("%s(%p), LOSS_EVENT_RATE=%u\n",
dccp_role(sk), sk, opt_val);
}

7
net/dccp/ccids/ccid3.h
View File

@ -67,11 +67,6 @@ enum ccid3_options {
TFRC_OPT_RECEIVE_RATE = 194,
};
struct ccid3_options_received {
u32 ccid3or_loss_event_rate;
u32 ccid3or_receive_rate;
};
/* TFRC sender states */
enum ccid3_hc_tx_states {
TFRC_SSTATE_NO_SENT = 1,
@ -97,7 +92,6 @@ enum ccid3_hc_tx_states {
* @tx_t_ld: Time last doubled during slow start
* @tx_t_nom: Nominal send time of next packet
* @tx_hist: Packet history
* @tx_options_received: Parsed set of retrieved options
*/
struct ccid3_hc_tx_sock {
u64 tx_x;
@ -115,7 +109,6 @@ struct ccid3_hc_tx_sock {
ktime_t tx_t_ld;
ktime_t tx_t_nom;
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)