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authorDavid Ahern <dsa@cumulusnetworks.com>2015-08-13 14:59:07 -0600
committerDavid S. Miller <davem@davemloft.net>2015-08-13 22:43:21 -0700
commit3bfd847203c6d89532f836ad3f5b4ff4ced26dd9 (patch)
tree1e6c9eae6bdf43bf1f184e1eeed51ef3a68bea51 /net/ipv4/fib_semantics.c
parent021dd3b8a142d482cb65a27bf6644e3764001460 (diff)
downloadlinux-3bfd847203c6d89532f836ad3f5b4ff4ced26dd9.tar.bz2
net: Use passed in table for nexthop lookups
If a user passes in a table for new routes use that table for nexthop lookups. Specifically, this solves the case where a connected route does not exist in the main table, but only another table and then a subsequent route is added with a next hop using the connected route. ie., $ ip route ls default via 10.0.2.2 dev eth0 10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15 169.254.0.0/16 dev eth0 scope link metric 1003 192.168.56.0/24 dev eth1 proto kernel scope link src 192.168.56.51 $ ip route ls table 10 1.1.1.0/24 dev eth2 scope link Without this patch adding a nexthop route fails: $ ip route add table 10 2.2.2.0/24 via 1.1.1.10 RTNETLINK answers: Network is unreachable With this patch the route is added successfully. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_semantics.c')
-rw-r--r--net/ipv4/fib_semantics.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 85e9a8abf15c..b7f1d20a9615 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -691,6 +691,7 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
}
rcu_read_lock();
{
+ struct fib_table *tbl = NULL;
struct flowi4 fl4 = {
.daddr = nh->nh_gw,
.flowi4_scope = cfg->fc_scope + 1,
@@ -701,8 +702,16 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
/* It is not necessary, but requires a bit of thinking */
if (fl4.flowi4_scope < RT_SCOPE_LINK)
fl4.flowi4_scope = RT_SCOPE_LINK;
- err = fib_lookup(net, &fl4, &res,
- FIB_LOOKUP_IGNORE_LINKSTATE);
+
+ if (cfg->fc_table)
+ tbl = fib_get_table(net, cfg->fc_table);
+
+ if (tbl)
+ err = fib_table_lookup(tbl, &fl4, &res,
+ FIB_LOOKUP_IGNORE_LINKSTATE);
+ else
+ err = fib_lookup(net, &fl4, &res,
+ FIB_LOOKUP_IGNORE_LINKSTATE);
if (err) {
rcu_read_unlock();
return err;