diff options
| author | Gerrit Renker | 2007-12-17 10:07:44 -0200 |
|---|---|---|
| committer | David S. Miller | 2008-01-28 14:58:21 -0800 |
| commit | 8e138e7949490eebdccbd65b1f660a0488149a6b (patch) | |
| tree | 8013f8f699f3bac8daa9747183a704854150c496 /net/dccp | |
| parent | 17159b0b494ad27f397f914d6eab1b91faf57630 (diff) | |
[CCID3]: Use a function to update p_inv, and p is never used
This patch
1) concentrates previously scattered computation of p_inv into one function;
2) removes the `p' element of the CCID3 RX sock (it is redundant);
3) makes the tfrc_rx_info structure standalone, only used on demand.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
| -rw-r--r-- | net/dccp/ccids/ccid3.c | 11 | ||||
| -rw-r--r-- | net/dccp/ccids/ccid3.h | 8 |
2 files changed, 12 insertions, 7 deletions
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c index cd9b9ffe2ec4..e31560daa0b9 100644 --- a/net/dccp/ccids/ccid3.c +++ b/net/dccp/ccids/ccid3.c @@ -917,6 +917,7 @@ static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len, u32 __user *optval, int __user *optlen) { const struct ccid3_hc_rx_sock *hcrx; + struct tfrc_rx_info rx_info; const void *val; /* Listen socks doesn't have a private CCID block */ @@ -926,10 +927,14 @@ static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len, hcrx = ccid3_hc_rx_sk(sk); switch (optname) { case DCCP_SOCKOPT_CCID_RX_INFO: - if (len < sizeof(hcrx->ccid3hcrx_tfrc)) + if (len < sizeof(rx_info)) return -EINVAL; - len = sizeof(hcrx->ccid3hcrx_tfrc); - val = &hcrx->ccid3hcrx_tfrc; + 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); + len = sizeof(rx_info); + val = &rx_info; break; default: return -ENOPROTOOPT; diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h index e9f6ff4f0552..49ca32bd7e79 100644 --- a/net/dccp/ccids/ccid3.h +++ b/net/dccp/ccids/ccid3.h @@ -139,6 +139,8 @@ enum ccid3_hc_rx_states { * @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) @@ -147,13 +149,11 @@ enum ccid3_hc_rx_states { * @ccid3hcrx_pinv - Inverse of Loss Event Rate (RFC 4342, sec. 8.5) */ struct ccid3_hc_rx_sock { - struct tfrc_rx_info ccid3hcrx_tfrc; -#define ccid3hcrx_x_recv ccid3hcrx_tfrc.tfrcrx_x_recv -#define ccid3hcrx_rtt ccid3hcrx_tfrc.tfrcrx_rtt -#define ccid3hcrx_p ccid3hcrx_tfrc.tfrcrx_p 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; |