From mboxrd@z Thu Jan 1 00:00:00 1970 From: Flavio Leitner Subject: [PATCH 2/3] bonding: fix to rejoin multicast groups immediately Date: Tue, 5 Oct 2010 21:23:58 -0300 Message-ID: <1286324639-22314-2-git-send-email-fleitner@redhat.com> References: <20101005220757.GB19931@redhat.com> Cc: bonding-devel@lists.sourceforge.net, Jay Vosburgh , Andy Gospodarek , David Miller , Flavio Leitner To: Return-path: Received: from mx1.redhat.com ([209.132.183.28]:17970 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757955Ab0JFAYY (ORCPT ); Tue, 5 Oct 2010 20:24:24 -0400 In-Reply-To: <20101005220757.GB19931@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: The IGMP specs states that if the system receives a membership report, it shouldn't send another for the next minute. However, if a link failure happens right after that, the backup slave and the switch connected to this slave will not know about the multicast and the traffic will hang for about a minute. This patch fixes it to rejoin multicast groups immediately after a failover restoring the multicast traffic. Signed-off-by: Flavio Leitner --- net/ipv4/igmp.c | 16 ++++++++-------- 1 files changed, 8 insertions(+), 8 deletions(-) diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 2a4bb76..25f3396 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -1269,14 +1269,14 @@ void ip_mc_rejoin_group(struct ip_mc_list *im) 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); + /* a failover is happening and switches + * must be notified immediately */ + if (IGMP_V1_SEEN(in_dev)) + igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT); + else if (IGMP_V2_SEEN(in_dev)) + igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT); + else + igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT); #endif } EXPORT_SYMBOL(ip_mc_rejoin_group); -- 1.7.0.1