netdev - Re: [PATCH net-next] net/sched: simplify tc_action_load

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Date: Thu, 4 Jan 2024 15:57:49 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: Pedro Tammela <pctammela@...atatu.com>
Cc: netdev@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, jhs@...atatu.com,
	xiyou.wangcong@...il.com
Subject: Re: [PATCH net-next] net/sched: simplify tc_action_load_ops
 parameters

Thu, Jan 04, 2024 at 03:11:13PM CET, pctammela@...atatu.com wrote:
>Instead of using two bools derived from a flags passed as arguments to
>the parent function of tc_action_load_ops, just pass the flags itself
>to tc_action_load_ops to simplify its parameters.
>
>Signed-off-by: Pedro Tammela <pctammela@...atatu.com>
>---
> include/net/act_api.h | 3 +--
> net/sched/act_api.c   | 9 ++++-----
> net/sched/cls_api.c   | 5 ++---
> 3 files changed, 7 insertions(+), 10 deletions(-)
>
>diff --git a/include/net/act_api.h b/include/net/act_api.h
>index 447985a45ef6..e1e5e72b901e 100644
>--- a/include/net/act_api.h
>+++ b/include/net/act_api.h
>@@ -208,8 +208,7 @@ int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
> 		    struct nlattr *est,
> 		    struct tc_action *actions[], int init_res[], size_t *attr_size,
> 		    u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
>-struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, bool police,
>-					 bool rtnl_held,
>+struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, u32 flags,
> 					 struct netlink_ext_ack *extack);
> struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
> 				    struct nlattr *nla, struct nlattr *est,
>diff --git a/net/sched/act_api.c b/net/sched/act_api.c
>index ef70d4771811..dd3b893802db 100644
>--- a/net/sched/act_api.c
>+++ b/net/sched/act_api.c
>@@ -1324,10 +1324,10 @@ void tcf_idr_insert_many(struct tc_action *actions[], int init_res[])
> 	}
> }
> 
>-struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, bool police,
>-					 bool rtnl_held,
>+struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, u32 flags,
> 					 struct netlink_ext_ack *extack)
> {
>+	bool police = flags & TCA_ACT_FLAGS_POLICE;
> 	struct nlattr *tb[TCA_ACT_MAX + 1];
> 	struct tc_action_ops *a_o;
> 	char act_name[IFNAMSIZ];
>@@ -1359,6 +1359,7 @@ struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, bool police,
> 	a_o = tc_lookup_action_n(act_name);
> 	if (a_o == NULL) {
> #ifdef CONFIG_MODULES
>+		bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL);

Empty line here please.

Otherwise this looks fine to me.
Reviewed-by: Jiri Pirko <jiri@...dia.com>




> 		if (rtnl_held)
> 			rtnl_unlock();
> 		request_module("act_%s", act_name);
>@@ -1475,9 +1476,7 @@ int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
> 	for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
> 		struct tc_action_ops *a_o;
> 
>-		a_o = tc_action_load_ops(tb[i], flags & TCA_ACT_FLAGS_POLICE,
>-					 !(flags & TCA_ACT_FLAGS_NO_RTNL),
>-					 extack);
>+		a_o = tc_action_load_ops(tb[i], flags, extack);
> 		if (IS_ERR(a_o)) {
> 			err = PTR_ERR(a_o);
> 			goto err_mod;
>diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
>index 46c98367d205..8d25e6b561dd 100644
>--- a/net/sched/cls_api.c
>+++ b/net/sched/cls_api.c
>@@ -3297,12 +3297,11 @@ int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **
> 		if (exts->police && tb[exts->police]) {
> 			struct tc_action_ops *a_o;
> 
>-			a_o = tc_action_load_ops(tb[exts->police], true,
>-						 !(flags & TCA_ACT_FLAGS_NO_RTNL),
>+			flags |= TCA_ACT_FLAGS_POLICE | TCA_ACT_FLAGS_BIND;
>+			a_o = tc_action_load_ops(tb[exts->police], flags,
> 						 extack);
> 			if (IS_ERR(a_o))
> 				return PTR_ERR(a_o);
>-			flags |= TCA_ACT_FLAGS_POLICE | TCA_ACT_FLAGS_BIND;
> 			act = tcf_action_init_1(net, tp, tb[exts->police],
> 						rate_tlv, a_o, init_res, flags,
> 						extack);
>-- 
>2.40.1
>