Hi, this is a small patch by Janusz Krzysztofik to ip_route_output_slow() that allows VIP-less LVS linux director to generate packets originating >From VIP if sysctl_ip_nonlocal_bind is set.
In a nutshell, the intention is for an LVS linux director to be able to send ICMP unreachable responses to end-users when real-servers are removed. http://archive.linuxvirtualserver.org/html/lvs-users/2007-01/msg00106.html I'm not really sure about the correctness of this approach, so I am sending it here to netdev for review Cc: Janusz Krzysztofik <[EMAIL PROTECTED]> Signed-off-by: Simon Horman <[EMAIL PROTECTED]> Index: net-2.6/net/ipv4/route.c =================================================================== --- net-2.6.orig/net/ipv4/route.c 2007-02-11 11:46:08.000000000 +0900 +++ net-2.6/net/ipv4/route.c 2007-02-11 11:46:23.000000000 +0900 @@ -2397,7 +2397,7 @@ /* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */ dev_out = ip_dev_find(oldflp->fl4_src); - if (dev_out == NULL) + if ((dev_out == NULL) && !(sysctl_ip_nonlocal_bind)) goto out; /* I removed check for oif == dev_out->oif here. @@ -2408,7 +2408,7 @@ of another iface. --ANK */ - if (oldflp->oif == 0 + if (dev_out && oldflp->oif == 0 && (MULTICAST(oldflp->fl4_dst) || oldflp->fl4_dst == htonl(0xFFFFFFFF))) { /* Special hack: user can direct multicasts and limited broadcast via necessary interface - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
