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authorDavid Ahern <dsa@cumulusnetworks.com>2015-12-16 13:20:44 -0800
committerDavid S. Miller <davem@davemloft.net>2015-12-18 14:43:38 -0500
commit6dd9a14e92e54895e143f10fef4d0b9abe109aa9 (patch)
treebb02bd14741b26fc9ba0abcaeb9a7f01a8339e68 /net/ipv4/sysctl_net_ipv4.c
parentnet: l3mdev: Add master device lookup by index (diff)
downloadlinux-dev-6dd9a14e92e54895e143f10fef4d0b9abe109aa9.tar.xz
linux-dev-6dd9a14e92e54895e143f10fef4d0b9abe109aa9.zip
net: Allow accepted sockets to be bound to l3mdev domain
Allow accepted sockets to derive their sk_bound_dev_if setting from the l3mdev domain in which the packets originated. A sysctl setting is added to control the behavior which is similar to sk_mark and sysctl_tcp_fwmark_accept. This effectively allow a process to have a "VRF-global" listen socket, with child sockets bound to the VRF device in which the packet originated. A similar behavior can be achieved using sk_mark, but a solution using marks is incomplete as it does not handle duplicate addresses in different L3 domains/VRFs. Allowing sockets to inherit the sk_bound_dev_if from l3mdev domain provides a complete solution. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
-rw-r--r--net/ipv4/sysctl_net_ipv4.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index a0bd7a55193e..41ff1f87dfd7 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -915,6 +915,17 @@ static struct ctl_table ipv4_net_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
+#ifdef CONFIG_NET_L3_MASTER_DEV
+ {
+ .procname = "tcp_l3mdev_accept",
+ .data = &init_net.ipv4.sysctl_tcp_l3mdev_accept,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+#endif
{
.procname = "tcp_mtu_probing",
.data = &init_net.ipv4.sysctl_tcp_mtu_probing,