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Message-ID: <20081220080826.GE3853@gerrit.erg.abdn.ac.uk>
Date: Sat, 20 Dec 2008 09:08:26 +0100
From: Gerrit Renker <gerrit@....abdn.ac.uk>
To: acme@...stprotocols.net
Cc: dccp@...r.kernel.org, netdev@...r.kernel.org
Subject: [RFC] [Patch 4/4] dccp: Integrate the TFRC library (dependency)
dccp: Integrate the TFRC library objects into DCCP
The TFRC library is a dependency of the CCID-3 (and CCID-4)
modules. The patch updates the Kconfig menu and Makefiles.
Note -- This solution is simple, I am sure that it can be
done better and thus welcome suggestions to improve the
conditional build statement below.
Signed-off-by: Gerrit Renker <gerrit@....abdn.ac.uk>
---
net/dccp/Makefile | 7 +++++--
net/dccp/ccid.c | 5 +++++
net/dccp/ccid.h | 9 +++++++++
net/dccp/ccids/Kconfig | 5 ++---
net/dccp/ccids/Makefile | 1 -
net/dccp/ccids/lib/Makefile | 3 ---
net/dccp/ccids/lib/tfrc.c | 15 +++------------
7 files changed, 24 insertions(+), 21 deletions(-)
--- a/net/dccp/ccids/Kconfig
+++ b/net/dccp/ccids/Kconfig
@@ -16,7 +16,6 @@ config IP_DCCP_CCID2_DEBUG
config IP_DCCP_CCID3
bool "CCID3 (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
@@ -83,8 +82,8 @@ config IP_DCCP_CCID3_RTO
therefore not be performed on WANs.
config IP_DCCP_TFRC_LIB
- tristate
- default n
+ bool
+ def_bool y if (IP_DCCP_CCID3 = y)
config IP_DCCP_TFRC_DEBUG
bool
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -5,6 +5,11 @@ dccp-y := ccid.o feat.o input.o minisock
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
# build dccp_ipv6 as module whenever either IPv6 or DCCP is a module
@@ -18,5 +23,3 @@ dccp-$(CONFIG_SYSCTL) += sysctl.o
dccp_diag-y := diag.o
dccp_probe-y := probe.o
-
-obj-y += ccids/
--- a/net/dccp/ccids/lib/Makefile
+++ /dev/null
@@ -1,3 +0,0 @@
-obj-$(CONFIG_IP_DCCP_TFRC_LIB) += dccp_tfrc_lib.o
-
-dccp_tfrc_lib-y := tfrc.o tfrc_equation.o packet_history.o loss_interval.o
--- a/net/dccp/ccids/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-y += lib/
--- a/net/dccp/ccids/lib/tfrc.c
+++ b/net/dccp/ccids/lib/tfrc.c
@@ -11,10 +11,10 @@
#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 +38,9 @@ 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@....abdn.ac.uk>, "
- "Ian McDonald <ian.mcdonald@...di.co.nz>, "
- "Arnaldo Carvalho de Melo <acme@...hat.com>");
-MODULE_DESCRIPTION("DCCP TFRC library");
-MODULE_LICENSE("GPL");
--- a/net/dccp/ccid.c
+++ b/net/dccp/ccid.c
@@ -216,6 +216,9 @@ int __init ccid_register_builtins(void)
{
int i, err;
+ err = tfrc_lib_init();
+ if (err)
+ return err;
for (i = 0; i < ARRAY_SIZE(ccids); i++) {
err = ccid_register(ccids[i]);
if (err)
@@ -225,6 +228,7 @@ int __init ccid_register_builtins(void)
return 0;
unwind_registrations:
+ tfrc_lib_exit();
while(--i >= 0)
ccid_unregister(ccids[i]);
return err;
@@ -236,4 +240,5 @@ void ccid_unregister_builtins(void)
for (i = 0; i < ARRAY_SIZE(ccids); i++)
ccid_unregister(ccids[i]);
+ tfrc_lib_exit();
}
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -91,6 +91,15 @@ extern struct ccid_operations ccid2_ops;
extern struct ccid_operations ccid3_ops;
#endif
+/* The TFRC library is a dependency of CCID-3 */
+#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
+
extern int ccid_register_builtins(void);
extern void ccid_unregister_builtins(void);
--
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