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authorLorenzo Colitti <lorenzo@google.com>2014-05-13 21:17:33 +0400
committerDavid S. Miller <davem@davemloft.net>2014-05-14 02:35:08 +0400
commite110861f86094cd78cc85593b873970092deb43a (patch)
tree535ecba8f65cefb68da0846ff54801bb32bf3c9e /include/net/netns
parent87e067cda6df60b55cea0239c2f3cee81e9f46df (diff)
downloadlinux-e110861f86094cd78cc85593b873970092deb43a.tar.xz
net: add a sysctl to reflect the fwmark on replies
Kernel-originated IP packets that have no user socket associated with them (e.g., ICMP errors and echo replies, TCP RSTs, etc.) are emitted with a mark of zero. Add a sysctl to make them have the same mark as the packet they are replying to. This allows an administrator that wishes to do so to use mark-based routing, firewalling, etc. for these replies by marking the original packets inbound. Tested using user-mode linux: - ICMP/ICMPv6 echo replies and errors. - TCP RST packets (IPv4 and IPv6). Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netns')
-rw-r--r--include/net/netns/ipv4.h2
-rw-r--r--include/net/netns/ipv6.h1
2 files changed, 3 insertions, 0 deletions
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index b2704fd0ec80..a32fc4d705da 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -77,6 +77,8 @@ struct netns_ipv4 {
int sysctl_ip_no_pmtu_disc;
int sysctl_ip_fwd_use_pmtu;
+ int sysctl_fwmark_reflect;
+
struct ping_group_range ping_group_range;
atomic_t dev_addr_genid;
diff --git a/include/net/netns/ipv6.h b/include/net/netns/ipv6.h
index 21edaf1f7916..19d3446e59d2 100644
--- a/include/net/netns/ipv6.h
+++ b/include/net/netns/ipv6.h
@@ -30,6 +30,7 @@ struct netns_sysctl_ipv6 {
int flowlabel_consistency;
int icmpv6_time;
int anycast_src_echo_reply;
+ int fwmark_reflect;
};
struct netns_ipv6 {