From: Quentin Monnet <quentin.monnet@netronome.com>
Date: Fri, 19 Jan 2018 17:44:45 -0800
Subject: net: sched: cls_u32: propagate extack support for filter offload
Patch-mainline: v4.16-rc1
Git-commit: 10a47e0f0930149664dbc44169edc1fef09c4257
References: bsc#1109837

Propagate the extack pointer from the `->change()` classifier operation
to the function used for filter replacement in cls_u32. This makes it
possible to use netlink extack messages in the future at replacement
time for this filter, although it is not used at this point.

Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 net/sched/cls_u32.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -502,7 +502,7 @@ static void u32_clear_hw_hnode(struct tc
 }
 
 static int u32_replace_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h,
-				u32 flags)
+				u32 flags, struct netlink_ext_ack *extack)
 {
 	struct tcf_block *block = tp->chain->block;
 	struct tc_cls_u32_offload cls_u32 = {};
@@ -544,7 +544,7 @@ static void u32_remove_hw_knode(struct t
 }
 
 static int u32_replace_hw_knode(struct tcf_proto *tp, struct tc_u_knode *n,
-				u32 flags)
+				u32 flags, struct netlink_ext_ack *extack)
 {
 	struct tcf_block *block = tp->chain->block;
 	struct tc_cls_u32_offload cls_u32 = {};
@@ -966,7 +966,7 @@ static int u32_change(struct net *net, s
 			return err;
 		}
 
-		err = u32_replace_hw_knode(tp, new, flags);
+		err = u32_replace_hw_knode(tp, new, flags, extack);
 		if (err) {
 			u32_destroy_key(tp, new, false);
 			return err;
@@ -1017,7 +1017,7 @@ static int u32_change(struct net *net, s
 		ht->prio = tp->prio;
 		idr_init(&ht->handle_idr);
 
-		err = u32_replace_hw_hnode(tp, ht, flags);
+		err = u32_replace_hw_hnode(tp, ht, flags, extack);
 		if (err) {
 			idr_remove_ext(&tp_c->handle_idr, handle);
 			kfree(ht);
@@ -1123,7 +1123,7 @@ static int u32_change(struct net *net, s
 		struct tc_u_knode __rcu **ins;
 		struct tc_u_knode *pins;
 
-		err = u32_replace_hw_knode(tp, n, flags);
+		err = u32_replace_hw_knode(tp, n, flags, extack);
 		if (err)
 			goto errhw;