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    Annotation of /trunk/kernel26-xen/patches-2.6.25-r1/1003-2.6.25-xen-ipv6-no-autoconf.patch

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    Revision 609 - (hide annotations) (download)
    Fri May 23 17:35:37 2008 UTC (16 years ago) by niro
    File size: 1359 byte(s) 
    -using opensuse xen patchset, updated kernel configs
    1 niro 609 From: Olaf Kirch <okir@suse.de>
    2     Subject: Allow to bring up network interface w/o ipv6 autoconf
    3     References: 161888
    4    
    5     When bringing up a xen bridge device, it will always be configured to
    6     use a MAC address of ff:ff:ff:ff:ff:fe. This greatly confuses IPv6 DAD,
    7     which starts logging lots and lots of useless messages to syslog.
    8    
    9     We really want to disable IPv6 on these interfaces, and there doesn't
    10     seem to be a reliable way to do this without bringing the interface
    11     up first (and triggering IPv6 autoconf).
    12    
    13     This patch makes autoconf (DAD and router discovery) depend on the
    14     interface's ability to do multicast. Turning off multicast for an
    15     interface before bringing it up will suppress autoconfiguration.
    16    
    17     net/ipv6/addrconf.c | 2 ++
    18     1 files changed, 2 insertions(+)
    19    
    20     --- a/net/ipv6/addrconf.c
    21     +++ b/net/ipv6/addrconf.c
    22     @@ -2637,6 +2637,7 @@
    23     spin_lock_bh(&ifp->lock);
    24    
    25     if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
    26     + !(dev->flags&IFF_MULTICAST) ||
    27     !(ifp->flags&IFA_F_TENTATIVE) ||
    28     ifp->flags & IFA_F_NODAD) {
    29     ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC);
    30     @@ -2730,6 +2731,7 @@
    31     if (ifp->idev->cnf.forwarding == 0 &&
    32     ifp->idev->cnf.rtr_solicits > 0 &&
    33     (dev->flags&IFF_LOOPBACK) == 0 &&
    34     + (dev->flags & IFF_MULTICAST) &&
    35     (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
    36     struct in6_addr all_routers;
    37