switchdev: add netlink flags to IPv4 FIB add op

Pass in the netlink flags (NLM_F_*) into switchdev driver for IPv4 FIB add op
to allow driver to 1) optimize hardware updates, 2) handle ip route prepend
and append commands correctly.

Suggested-by: Jamal Hadi Salim <jhs@mojatatu.com>
Suggested-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 2 deletions

diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index aba6aa2656d8..8cf42a69baf4 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -1,6 +1,7 @@
 /*
  * net/switchdev/switchdev.c - Switch device API
  * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
+ * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -294,12 +295,13 @@ static struct net_device *netdev_switch_get_dev_by_nhs(struct fib_info *fi)
  *      @fi: route FIB info structure
  *      @tos: route TOS
  *      @type: route type
+ *      @nlflags: netlink flags passed in (NLM_F_*)
  *      @tb_id: route table ID
  *
  *      Add IPv4 route entry to switch device.
  */
 int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
-                               u8 tos, u8 type, u32 tb_id)
+                               u8 tos, u8 type, u32 nlflags, u32 tb_id)
 {
         struct net_device *dev;
         const struct net_device_ops *ops;
@@ -324,7 +326,8 @@ int netdev_switch_fib_ipv4_add(u32 dst, int dst_len, struct fib_info *fi,
 
         if (ops->ndo_switch_fib_ipv4_add) {
                 err = ops->ndo_switch_fib_ipv4_add(dev, htonl(dst), dst_len,
-                                                   fi, tos, type, tb_id);
+                                                   fi, tos, type, nlflags,
+                                                   tb_id);
                 if (!err)
                         fi->fib_flags |= RTNH_F_EXTERNAL;
         }