Commit 95b21d7e authored by Gerrit Renker's avatar Gerrit Renker Committed by David S. Miller

[CCID2]: Replace pipe assignment-function with assignment

The function ccid2_change_pipe only does an assignment. This patch simplifies the code by
replacing the function with the assignment it performs.

Furthermore, the type of pipe is promoted from `signed' to unsigned (increasing the range).
As a result, a BUG_ON test for negative values now becomes obsolete (for safety not removed,
but replaced with a less annoying `DCCP_BUG').
Signed-off-by: default avatarGerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: default avatarIan McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3deeadd7
......@@ -171,11 +171,6 @@ static void ccid2_change_srtt(struct ccid2_hc_tx_sock *hctx, long val)
hctx->ccid2hctx_srtt = val;
}
static void ccid2_change_pipe(struct ccid2_hc_tx_sock *hctx, long val)
{
hctx->ccid2hctx_pipe = val;
}
static void ccid2_start_rto_timer(struct sock *sk);
static void ccid2_hc_tx_rto_expire(unsigned long data)
......@@ -205,11 +200,11 @@ static void ccid2_hc_tx_rto_expire(unsigned long data)
ccid2_start_rto_timer(sk);
/* adjust pipe, cwnd etc */
ccid2_change_pipe(hctx, 0);
hctx->ccid2hctx_ssthresh = hctx->ccid2hctx_cwnd / 2;
if (hctx->ccid2hctx_ssthresh < 2)
hctx->ccid2hctx_ssthresh = 2;
hctx->ccid2hctx_cwnd = 1;
hctx->ccid2hctx_pipe = 0;
/* clear state about stuff we sent */
hctx->ccid2hctx_seqt = hctx->ccid2hctx_seqh;
......@@ -248,8 +243,7 @@ static void ccid2_hc_tx_packet_sent(struct sock *sk, int more, unsigned int len)
BUG_ON(!hctx->ccid2hctx_sendwait);
hctx->ccid2hctx_sendwait = 0;
ccid2_change_pipe(hctx, hctx->ccid2hctx_pipe + 1);
BUG_ON(hctx->ccid2hctx_pipe < 0);
hctx->ccid2hctx_pipe++;
/* There is an issue. What if another packet is sent between
* packet_send() and packet_sent(). Then the sequence number would be
......@@ -519,8 +513,10 @@ static void ccid2_hc_tx_dec_pipe(struct sock *sk)
{
struct ccid2_hc_tx_sock *hctx = ccid2_hc_tx_sk(sk);
ccid2_change_pipe(hctx, hctx->ccid2hctx_pipe-1);
BUG_ON(hctx->ccid2hctx_pipe < 0);
if (hctx->ccid2hctx_pipe == 0)
DCCP_BUG("pipe == 0");
else
hctx->ccid2hctx_pipe--;
if (hctx->ccid2hctx_pipe == 0)
ccid2_hc_tx_kill_rto_timer(sk);
......
......@@ -42,6 +42,7 @@ struct ccid2_seq {
/** struct ccid2_hc_tx_sock - CCID2 TX half connection
*
* @ccid2hctx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5
* @ccid2hctx_ssacks - ACKs recv in slow start
* @ccid2hctx_acks - ACKS recv in AI phase
* @ccid2hctx_lastrtt -time RTT was last measured
......@@ -51,9 +52,9 @@ struct ccid2_seq {
struct ccid2_hc_tx_sock {
u32 ccid2hctx_cwnd;
u32 ccid2hctx_ssthresh;
u32 ccid2hctx_pipe;
int ccid2hctx_ssacks;
int ccid2hctx_acks;
int ccid2hctx_pipe;
struct ccid2_seq *ccid2hctx_seqbuf[CCID2_SEQBUF_MAX];
int ccid2hctx_seqbufc;
struct ccid2_seq *ccid2hctx_seqh;
......
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