diff options
| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2007-12-12 13:50:51 -0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:57:18 -0800 |
| commit | 8a9c7e92e0ca97632126feee32ba2698b4eb6c8f (patch) | |
| tree | b569d6e39f3630f7a973814a925502035c63904b /net/dccp/ccids/lib/packet_history.h | |
| parent | 8995a238ef6869bc5c80240440bc58452c7af283 (diff) | |
[TFRC]: Ringbuffer to track loss interval history
A ringbuffer-based implementation of loss interval history is easier to
maintain, allocate, and update.
The `swap' routine to keep the RX history sorted is due to and was written
by Arnaldo Carvalho de Melo, simplifying an earlier macro-based variant.
Details:
* access to the Loss Interval Records via macro wrappers (with safety checks);
* simplified, on-demand allocation of entries (no extra memory consumption on
lossless links); cache allocation is local to the module / exported as service;
* provision of RFC-compliant algorithm to re-compute average loss interval;
* provision of comprehensive, new loss detection algorithm
- support for all cases of loss, including re-ordered/duplicate packets;
- waiting for NDUPACK=3 packets to fill the hole;
- updating loss records when a late-arriving packet fills a hole.
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/ccids/lib/packet_history.h')
| -rw-r--r-- | net/dccp/ccids/lib/packet_history.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/net/dccp/ccids/lib/packet_history.h b/net/dccp/ccids/lib/packet_history.h index e58b0fcdc6a..24edd8df54b 100644 --- a/net/dccp/ccids/lib/packet_history.h +++ b/net/dccp/ccids/lib/packet_history.h @@ -36,10 +36,9 @@ #ifndef _DCCP_PKT_HIST_ #define _DCCP_PKT_HIST_ -#include <linux/ktime.h> -#include <linux/types.h> - -struct sk_buff; +#include <linux/list.h> +#include <linux/slab.h> +#include "tfrc.h" struct tfrc_tx_hist_entry; @@ -125,6 +124,10 @@ extern void tfrc_rx_hist_add_packet(struct tfrc_rx_hist *h, extern int tfrc_rx_hist_duplicate(struct tfrc_rx_hist *h, struct sk_buff *skb); extern int tfrc_rx_hist_new_loss_indicated(struct tfrc_rx_hist *h, const struct sk_buff *skb, u32 ndp); +struct tfrc_loss_hist; +extern int tfrc_rx_handle_loss(struct tfrc_rx_hist *, struct tfrc_loss_hist *, + struct sk_buff *skb, u32 ndp, + u32 (*first_li)(struct sock *), struct sock *); extern u32 tfrc_rx_hist_sample_rtt(struct tfrc_rx_hist *h, const struct sk_buff *skb); extern int tfrc_rx_hist_alloc(struct tfrc_rx_hist *h); |