netdev - [patch net-next 20/20] net: sched: cls_u32: no need to call tcf_exts

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Message-Id: <20170728144042.6380-21-jiri@resnulli.us>
Date:   Fri, 28 Jul 2017 16:40:42 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jhs@...atatu.com, xiyou.wangcong@...il.com,
        daniel@...earbox.net, mlxsw@...lanox.com
Subject: [patch net-next 20/20] net: sched: cls_u32: no need to call tcf_exts_change for newly allocated struct

From: Jiri Pirko <jiri@...lanox.com>

As the n struct was allocated right before u32_set_parms call,
no need to use tcf_exts_change to do atomic change, and we can just
fill-up the unused exts struct directly by tcf_exts_validate.

Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
 net/sched/cls_u32.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 2c834f3..b8b0786 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -723,27 +723,24 @@ static int u32_set_parms(struct net *net, struct tcf_proto *tp,
 			 struct tc_u_knode *n, struct nlattr **tb,
 			 struct nlattr *est, bool ovr)
 {
-	struct tcf_exts e;
 	int err;
 
-	tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE);
-	err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
+	err = tcf_exts_validate(net, tp, tb, est, &n->exts, ovr);
 	if (err < 0)
-		goto errout;
+		return err;
 
-	err = -EINVAL;
 	if (tb[TCA_U32_LINK]) {
 		u32 handle = nla_get_u32(tb[TCA_U32_LINK]);
 		struct tc_u_hnode *ht_down = NULL, *ht_old;
 
 		if (TC_U32_KEY(handle))
-			goto errout;
+			return -EINVAL;
 
 		if (handle) {
 			ht_down = u32_lookup_ht(ht->tp_c, handle);
 
 			if (ht_down == NULL)
-				goto errout;
+				return -EINVAL;
 			ht_down->refcnt++;
 		}
 
@@ -763,16 +760,11 @@ static int u32_set_parms(struct net *net, struct tcf_proto *tp,
 		int ret;
 		ret = tcf_change_indev(net, tb[TCA_U32_INDEV]);
 		if (ret < 0)
-			goto errout;
+			return -EINVAL;
 		n->ifindex = ret;
 	}
 #endif
-	tcf_exts_change(&n->exts, &e);
-
 	return 0;
-errout:
-	tcf_exts_destroy(&e);
-	return err;
 }
 
 static void u32_replace_knode(struct tcf_proto *tp, struct tc_u_common *tp_c,
-- 
2.9.3