Piteball
/
android_kernel_samsung_msm8976
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
1
1
Fork 0
Code Issues Projects Releases Wiki Activity

dccp: Integrate the TFRC library with DCCP 

This patch integrates the TFRC library, which is a dependency of CCID-3 (and
CCID-4), with the new use of CCIDs in the DCCP module.		

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gerrit Renker 2009-01-04 21:45:33 -08:00 committed by David S. Miller
parent e5fd56ca4e
commit 129fa44785
12 changed files with 27 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/dccp/Makefile
View File

@ -8,6 +8,10 @@ dccp-y := ccid.o feat.o input.o minisocks.o options.o output.o proto.o timer.o
# CCID-2 is default (RFC 4340, p. 77) and has Ack Vectors as dependency
dccp-y += ccids/ccid2.o ackvec.o
dccp-$(CONFIG_IP_DCCP_CCID3) += ccids/ccid3.o
dccp-$(CONFIG_IP_DCCP_TFRC_LIB) += ccids/lib/tfrc.o \
ccids/lib/tfrc_equation.o \
ccids/lib/packet_history.o \
ccids/lib/loss_interval.o
dccp_ipv4-y := ipv4.o
@ -22,5 +26,3 @@ dccp-$(CONFIG_SYSCTL) += sysctl.o
dccp_diag-y := diag.o
dccp_probe-y := probe.o
obj-y += ccids/

8
net/dccp/ccid.c
View File

@ -12,6 +12,7 @@
*/
#include "ccid.h"
#include "ccids/lib/tfrc.h"
static struct ccid_operations *ccids[] = {
&ccid2_ops,
@ -199,7 +200,10 @@ void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk)
int __init ccid_initialize_builtins(void)
{
int i, err;
int i, err = tfrc_lib_init();
if (err)
return err;
for (i = 0; i < ARRAY_SIZE(ccids); i++) {
err = ccid_activate(ccids[i]);
@ -211,6 +215,7 @@ int __init ccid_initialize_builtins(void)
unwind_registrations:
while(--i >= 0)
ccid_deactivate(ccids[i]);
tfrc_lib_exit();
return err;
}
@ -220,4 +225,5 @@ void ccid_cleanup_builtins(void)
for (i = 0; i < ARRAY_SIZE(ccids); i++)
ccid_deactivate(ccids[i]);
tfrc_lib_exit();
}

9
net/dccp/ccids/Kconfig
View File

@ -14,7 +14,6 @@ config IP_DCCP_CCID2_DEBUG
config IP_DCCP_CCID3
bool "CCID-3 (TCP-Friendly) (EXPERIMENTAL)"
def_bool y if (IP_DCCP = y || IP_DCCP = m)
select IP_DCCP_TFRC_LIB
---help---
CCID-3 denotes TCP-Friendly Rate Control (TFRC), an equation-based
rate-controlled congestion control mechanism. TFRC is designed to
@ -80,12 +79,8 @@ config IP_DCCP_CCID3_RTO
therefore not be performed on WANs.
config IP_DCCP_TFRC_LIB
tristate
default n
def_bool y if IP_DCCP_CCID3
config IP_DCCP_TFRC_DEBUG
bool
depends on IP_DCCP_TFRC_LIB
default y if IP_DCCP_CCID3_DEBUG
def_bool y if IP_DCCP_CCID3_DEBUG
endmenu

1
net/dccp/ccids/Makefile
View File

@ -1 +0,0 @@
obj-y += lib/

3
net/dccp/ccids/lib/Makefile
View File

@ -1,3 +0,0 @@
obj-$(CONFIG_IP_DCCP_TFRC_LIB) += dccp_tfrc_lib.o
dccp_tfrc_lib-y := tfrc.o tfrc_equation.o packet_history.o loss_interval.o

3
net/dccp/ccids/lib/loss_interval.c
View File

@ -60,7 +60,6 @@ void tfrc_lh_cleanup(struct tfrc_loss_hist *lh)
lh->ring[LIH_INDEX(lh->counter)] = NULL;
}
}
EXPORT_SYMBOL_GPL(tfrc_lh_cleanup);
static void tfrc_lh_calc_i_mean(struct tfrc_loss_hist *lh)
{
@ -121,7 +120,6 @@ u8 tfrc_lh_update_i_mean(struct tfrc_loss_hist *lh, struct sk_buff *skb)
return (lh->i_mean < old_i_mean);
}
EXPORT_SYMBOL_GPL(tfrc_lh_update_i_mean);
/* Determine if `new_loss' does begin a new loss interval [RFC 4342, 10.2] */
static inline u8 tfrc_lh_is_new_loss(struct tfrc_loss_interval *cur,
@ -169,7 +167,6 @@ int tfrc_lh_interval_add(struct tfrc_loss_hist *lh, struct tfrc_rx_hist *rh,
}
return 1;
}
EXPORT_SYMBOL_GPL(tfrc_lh_interval_add);
int __init tfrc_li_init(void)
{

9
net/dccp/ccids/lib/packet_history.c
View File

@ -94,7 +94,6 @@ int tfrc_tx_hist_add(struct tfrc_tx_hist_entry **headp, u64 seqno)
*headp = entry;
return 0;
}
EXPORT_SYMBOL_GPL(tfrc_tx_hist_add);
void tfrc_tx_hist_purge(struct tfrc_tx_hist_entry **headp)
{
@ -109,7 +108,6 @@ void tfrc_tx_hist_purge(struct tfrc_tx_hist_entry **headp)
*headp = NULL;
}
EXPORT_SYMBOL_GPL(tfrc_tx_hist_purge);
u32 tfrc_tx_hist_rtt(struct tfrc_tx_hist_entry *head, const u64 seqno,
const ktime_t now)
@ -127,7 +125,6 @@ u32 tfrc_tx_hist_rtt(struct tfrc_tx_hist_entry *head, const u64 seqno,
return rtt;
}
EXPORT_SYMBOL_GPL(tfrc_tx_hist_rtt);
/*
@ -172,7 +169,6 @@ void tfrc_rx_hist_add_packet(struct tfrc_rx_hist *h,
tfrc_rx_hist_entry_from_skb(entry, skb, ndp);
}
EXPORT_SYMBOL_GPL(tfrc_rx_hist_add_packet);
/* has the packet contained in skb been seen before? */
int tfrc_rx_hist_duplicate(struct tfrc_rx_hist *h, struct sk_buff *skb)
@ -189,7 +185,6 @@ int tfrc_rx_hist_duplicate(struct tfrc_rx_hist *h, struct sk_buff *skb)
return 0;
}
EXPORT_SYMBOL_GPL(tfrc_rx_hist_duplicate);
static void tfrc_rx_hist_swap(struct tfrc_rx_hist *h, const u8 a, const u8 b)
{
@ -390,7 +385,6 @@ int tfrc_rx_handle_loss(struct tfrc_rx_hist *h,
}
return is_new_loss;
}
EXPORT_SYMBOL_GPL(tfrc_rx_handle_loss);
int tfrc_rx_hist_alloc(struct tfrc_rx_hist *h)
{
@ -412,7 +406,6 @@ out_free:
}
return -ENOBUFS;
}
EXPORT_SYMBOL_GPL(tfrc_rx_hist_alloc);
void tfrc_rx_hist_purge(struct tfrc_rx_hist *h)
{
@ -424,7 +417,6 @@ void tfrc_rx_hist_purge(struct tfrc_rx_hist *h)
h->ring[i] = NULL;
}
}
EXPORT_SYMBOL_GPL(tfrc_rx_hist_purge);
/**
* tfrc_rx_hist_rtt_last_s - reference entry to compute RTT samples against
@ -495,4 +487,3 @@ keep_ref_for_next_time:
return sample;
}
EXPORT_SYMBOL_GPL(tfrc_rx_hist_sample_rtt);

19
net/dccp/ccids/lib/tfrc.c
View File

@ -1,20 +1,18 @@
/*
* TFRC: main module holding the pieces of the TFRC library together
* TFRC library initialisation
*
* Copyright (c) 2007 The University of Aberdeen, Scotland, UK
* Copyright (c) 2007 Arnaldo Carvalho de Melo <acme@redhat.com>
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include "tfrc.h"
#ifdef CONFIG_IP_DCCP_TFRC_DEBUG
int tfrc_debug;
module_param(tfrc_debug, bool, 0644);
MODULE_PARM_DESC(tfrc_debug, "Enable debug messages");
MODULE_PARM_DESC(tfrc_debug, "Enable TFRC debug messages");
#endif
static int __init tfrc_module_init(void)
int __init tfrc_lib_init(void)
{
int rc = tfrc_li_init();
@ -38,18 +36,9 @@ out:
return rc;
}
static void __exit tfrc_module_exit(void)
void __exit tfrc_lib_exit(void)
{
tfrc_rx_packet_history_exit();
tfrc_tx_packet_history_exit();
tfrc_li_exit();
}
module_init(tfrc_module_init);
module_exit(tfrc_module_exit);
MODULE_AUTHOR("Gerrit Renker <gerrit@erg.abdn.ac.uk>, "
"Ian McDonald <ian.mcdonald@jandi.co.nz>, "
"Arnaldo Carvalho de Melo <acme@redhat.com>");
MODULE_DESCRIPTION("DCCP TFRC library");
MODULE_LICENSE("GPL");

11
net/dccp/ccids/lib/tfrc.h
View File

@ -17,7 +17,8 @@
#include <linux/types.h>
#include <linux/math64.h>
#include "../../dccp.h"
/* internal includes that this module exports: */
/* internal includes that this library exports: */
#include "loss_interval.h"
#include "packet_history.h"
@ -66,4 +67,12 @@ extern void tfrc_rx_packet_history_exit(void);
extern int tfrc_li_init(void);
extern void tfrc_li_exit(void);
#ifdef CONFIG_IP_DCCP_TFRC_LIB
extern int tfrc_lib_init(void);
extern void tfrc_lib_exit(void);
#else
#define tfrc_lib_init() (0)
#define tfrc_lib_exit()
#endif
#endif /* _TFRC_H_ */

4
net/dccp/ccids/lib/tfrc_equation.c
View File

@ -659,8 +659,6 @@ u32 tfrc_calc_x(u16 s, u32 R, u32 p)
return scaled_div32(result, f);
}
EXPORT_SYMBOL_GPL(tfrc_calc_x);
/**
* tfrc_calc_x_reverse_lookup - try to find p given f(p)
*
@ -693,5 +691,3 @@ u32 tfrc_calc_x_reverse_lookup(u32 fvalue)
index = tfrc_binsearch(fvalue, 0);
return (index + 1) * 1000000 / TFRC_CALC_X_ARRSIZE;
}
EXPORT_SYMBOL_GPL(tfrc_calc_x_reverse_lookup);

4
net/dccp/feat.c
View File

@ -1214,8 +1214,6 @@ const char *dccp_feat_typename(const u8 type)
return NULL;
}
EXPORT_SYMBOL_GPL(dccp_feat_typename);
const char *dccp_feat_name(const u8 feat)
{
static const char *feature_names[] = {
@ -1240,6 +1238,4 @@ const char *dccp_feat_name(const u8 feat)
return feature_names[feat];
}
EXPORT_SYMBOL_GPL(dccp_feat_name);
#endif /* CONFIG_IP_DCCP_DEBUG */

2
net/dccp/input.c
View File

@ -741,5 +741,3 @@ u32 dccp_sample_rtt(struct sock *sk, long delta)
return delta;
}
EXPORT_SYMBOL_GPL(dccp_sample_rtt);