diff options
Diffstat (limited to 'drivers/net/vrf.c')
| -rw-r--r-- | drivers/net/vrf.c | 35 |
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, |