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authorDavid Ahern <dsa@cumulusnetworks.com>2015-10-05 08:51:26 -0700
committerDavid S. Miller <davem@davemloft.net>2015-10-07 04:27:44 -0700
commit8cbb512c923d5f695ff6265b2b741b1718e3b444 (patch)
tree194de9f9c5ec859456dc8274136fcda881dc8408 /drivers/net/vrf.c
parentnet: Refactor path selection in __ip_route_output_key_hash (diff)
downloadlinux-dev-8cbb512c923d5f695ff6265b2b741b1718e3b444.tar.xz
linux-dev-8cbb512c923d5f695ff6265b2b741b1718e3b444.zip
net: Add source address lookup op for VRF
Add operation to l3mdev to lookup source address for a given flow. Add support for the operation to VRF driver and convert existing IPv4 hooks to use the new lookup. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
-rw-r--r--drivers/net/vrf.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index 8713317eed86..64499766e00f 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -36,6 +36,9 @@
#include <net/addrconf.h>
#include <net/l3mdev.h>
+#define RT_FL_TOS(oldflp4) \
+ ((oldflp4)->flowi4_tos & (IPTOS_RT_MASK | RTO_ONLINK))
+
#define DRV_NAME "vrf"
#define DRV_VERSION "1.0"
@@ -553,9 +556,41 @@ static struct rtable *vrf_get_rtable(const struct net_device *dev,
return rth;
}
+/* called under rcu_read_lock */
+static void vrf_get_saddr(struct net_device *dev, struct flowi4 *fl4)
+{
+ struct fib_result res = { .tclassid = 0 };
+ struct net *net = dev_net(dev);
+ u32 orig_tos = fl4->flowi4_tos;
+ u8 flags = fl4->flowi4_flags;
+ u8 scope = fl4->flowi4_scope;
+ u8 tos = RT_FL_TOS(fl4);
+
+ if (unlikely(!fl4->daddr))
+ return;
+
+ fl4->flowi4_flags |= FLOWI_FLAG_SKIP_NH_OIF;
+ fl4->flowi4_iif = LOOPBACK_IFINDEX;
+ fl4->flowi4_tos = tos & IPTOS_RT_MASK;
+ fl4->flowi4_scope = ((tos & RTO_ONLINK) ?
+ RT_SCOPE_LINK : RT_SCOPE_UNIVERSE);
+
+ if (!fib_lookup(net, fl4, &res, 0)) {
+ if (res.type == RTN_LOCAL)
+ fl4->saddr = res.fi->fib_prefsrc ? : fl4->daddr;
+ else
+ fib_select_path(net, &res, fl4, -1);
+ }
+
+ fl4->flowi4_flags = flags;
+ fl4->flowi4_tos = orig_tos;
+ fl4->flowi4_scope = scope;
+}
+
static const struct l3mdev_ops vrf_l3mdev_ops = {
.l3mdev_fib_table = vrf_fib_table,
.l3mdev_get_rtable = vrf_get_rtable,
+ .l3mdev_get_saddr = vrf_get_saddr,
};
static void vrf_get_drvinfo(struct net_device *dev,