GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 07:12:09 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

bonding: Improve IGMP join processing

Browse source 
In active-backup mode, the current bonding code duplicates IGMP
traffic to all slaves, so that switches are up to date in case of a
failover from an active to a backup interface.  If bonding then fails
back to the original active interface, it is likely that the "active
slave" switch's IGMP forwarding for the port will be out of date until
some event occurs to refresh the switch (e.g., a membership query).

	This patch alters the behavior of bonding to no longer flood
IGMP to all ports, and to issue IGMP JOINs to the newly active port at
the time of a failover.  This insures that switches are kept up to date
for all cases.

	"GOELLESCH Niels" <niels.goellesch@eurocontrol.int> originally
reported this problem, and included a patch.  His original patch was
modified by Jay Vosburgh to additionally remove the existing IGMP flood
behavior, use RCU, streamline code paths, fix trailing white space, and
adjust for style.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Jay Vosburgh 2007-02-28 17:03:37 -08:00 • committed by Jeff Garzik
parent e245cb71d4
commit a816c7c712
3 changed files with 50 additions and 51 deletions
Download patch file Download diff file Expand all files Collapse all files

23
net/ipv4/igmp.c
View file

@ -1250,6 +1250,28 @@ out:
return;
}
/*
* Resend IGMP JOIN report; used for bonding.
*/
void ip_mc_rejoin_group(struct ip_mc_list *im)
{
struct in_device *in_dev = im->interface;
#ifdef CONFIG_IP_MULTICAST
if (im->multiaddr == IGMP_ALL_HOSTS)
return;
if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) {
igmp_mod_timer(im, IGMP_Initial_Report_Delay);
return;
}
/* else, v3 */
im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv :
IGMP_Unsolicited_Report_Count;
igmp_ifc_event(in_dev);
#endif
}
/*
* A socket has left a multicast group on device dev
*/
@ -2596,3 +2618,4 @@ int __init igmp_mc_proc_init(void)
EXPORT_SYMBOL(ip_mc_dec_group);
EXPORT_SYMBOL(ip_mc_inc_group);
EXPORT_SYMBOL(ip_mc_join_group);
EXPORT_SYMBOL(ip_mc_rejoin_group);