linux-kernel - Re: [PATCH net-next 1/2] net: sparx5: flower: cleanup sparx5_tc_flower_handler_control

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Date: Tue, 23 Apr 2024 13:22:12 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Asbjørn Sloth Tønnesen <ast@...erby.net>
Cc: netdev@...r.kernel.org, Steen Hegelund <Steen.Hegelund@...rochip.com>,
	Lars Povlsen <lars.povlsen@...rochip.com>,
	Daniel Machon <daniel.machon@...rochip.com>,
	UNGLinuxDriver@...rochip.com,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-kernel@...r.kernel.org,
	Jacob Keller <jacob.e.keller@...el.com>
Subject: Re: [PATCH net-next 1/2] net: sparx5: flower: cleanup
 sparx5_tc_flower_handler_control_usage()

Tue, Apr 23, 2024 at 12:27:26PM CEST, ast@...erby.net wrote:
>Define extack locally, to reduce line lengths and future users.
>
>Only perform fragment handling, when at least one fragment flag is set.
>
>Remove goto, as it's only used once, and the error message is specific
>to that context.

3 changes, 3 patches?

>
>Only compile tested.
>
>Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
>---
> .../ethernet/microchip/sparx5/sparx5_tc_flower.c    | 13 ++++++-------
> 1 file changed, 6 insertions(+), 7 deletions(-)
>
>diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
>index 663571fe7b2d..d846edd77a01 100644
>--- a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
>+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
>@@ -159,13 +159,14 @@ sparx5_tc_flower_handler_basic_usage(struct vcap_tc_flower_parse_usage *st)
> static int
> sparx5_tc_flower_handler_control_usage(struct vcap_tc_flower_parse_usage *st)
> {
>+	struct netlink_ext_ack *extack = st->fco->common.extack;
> 	struct flow_match_control mt;
> 	u32 value, mask;
> 	int err = 0;
> 
> 	flow_rule_match_control(st->frule, &mt);
> 
>-	if (mt.mask->flags) {
>+	if (mt.mask->flags & (FLOW_DIS_IS_FRAGMENT | FLOW_DIS_FIRST_FRAG)) {
> 		u8 is_frag_key = !!(mt.key->flags & FLOW_DIS_IS_FRAGMENT);
> 		u8 is_frag_mask = !!(mt.mask->flags & FLOW_DIS_IS_FRAGMENT);
> 		u8 is_frag_idx = (is_frag_key << 1) | is_frag_mask;
>@@ -190,17 +191,15 @@ sparx5_tc_flower_handler_control_usage(struct vcap_tc_flower_parse_usage *st)
> 		err = vcap_rule_add_key_u32(st->vrule,
> 					    VCAP_KF_L3_FRAGMENT_TYPE,
> 					    value, mask);
>-		if (err)
>-			goto out;
>+		if (err) {
>+			NL_SET_ERR_MSG_MOD(extack, "ip_frag parse error");
>+			return err;
>+		}
> 	}
> 
> 	st->used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL);
> 
> 	return err;
>-
>-out:
>-	NL_SET_ERR_MSG_MOD(st->fco->common.extack, "ip_frag parse error");
>-	return err;
> }
> 
> static int
>-- 
>2.43.0
>
>