netdev - [PATCH net] sfc: include vport_id in filter spec hash and equal()

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Date:   Tue, 18 Oct 2022 10:28:41 +0100
From:   <pieter.jansen-van-vuuren@....com>
To:     <netdev@...r.kernel.org>, <linux-net-drivers@....com>
CC:     <davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <edumazet@...gle.com>, <ecree.xilinx@...il.com>,
        <habetsm.xilinx@...il.com>,
        Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@....com>
Subject: [PATCH net] sfc: include vport_id in filter spec hash and equal()

From: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@....com>

Filters on different vports are qualified by different implicit MACs and/or
VLANs, so shouldn't be considered equal even if their other match fields
are identical.

Fixes: 7c460d9be610 ("sfc: Extend and abstract efx_filter_spec to cover Huntington/EF10")
Co-developed-by: Edward Cree <ecree.xilinx@...il.com>
Signed-off-by: Edward Cree <ecree.xilinx@...il.com>
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@....com>
Reviewed-by: Martin Habets <habetsm.xilinx@...il.com>
---
 drivers/net/ethernet/sfc/filter.h    |  4 ++--
 drivers/net/ethernet/sfc/rx_common.c | 10 +++++-----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/sfc/filter.h b/drivers/net/ethernet/sfc/filter.h
index be72e71da027..5f201a547e5b 100644
--- a/drivers/net/ethernet/sfc/filter.h
+++ b/drivers/net/ethernet/sfc/filter.h
@@ -162,9 +162,9 @@ struct efx_filter_spec {
 	u32	priority:2;
 	u32	flags:6;
 	u32	dmaq_id:12;
-	u32	vport_id;
 	u32	rss_context;
-	__be16	outer_vid __aligned(4); /* allow jhash2() of match values */
+	u32	vport_id;
+	__be16	outer_vid;
 	__be16	inner_vid;
 	u8	loc_mac[ETH_ALEN];
 	u8	rem_mac[ETH_ALEN];
diff --git a/drivers/net/ethernet/sfc/rx_common.c b/drivers/net/ethernet/sfc/rx_common.c
index 4826e6a7e4ce..9220afeddee8 100644
--- a/drivers/net/ethernet/sfc/rx_common.c
+++ b/drivers/net/ethernet/sfc/rx_common.c
@@ -660,17 +660,17 @@ bool efx_filter_spec_equal(const struct efx_filter_spec *left,
 	     (EFX_FILTER_FLAG_RX | EFX_FILTER_FLAG_TX)))
 		return false;
 
-	return memcmp(&left->outer_vid, &right->outer_vid,
+	return memcmp(&left->vport_id, &right->vport_id,
 		      sizeof(struct efx_filter_spec) -
-		      offsetof(struct efx_filter_spec, outer_vid)) == 0;
+		      offsetof(struct efx_filter_spec, vport_id)) == 0;
 }
 
 u32 efx_filter_spec_hash(const struct efx_filter_spec *spec)
 {
-	BUILD_BUG_ON(offsetof(struct efx_filter_spec, outer_vid) & 3);
-	return jhash2((const u32 *)&spec->outer_vid,
+	BUILD_BUG_ON(offsetof(struct efx_filter_spec, vport_id) & 3);
+	return jhash2((const u32 *)&spec->vport_id,
 		      (sizeof(struct efx_filter_spec) -
-		       offsetof(struct efx_filter_spec, outer_vid)) / 4,
+		       offsetof(struct efx_filter_spec, vport_id)) / 4,
 		      0);
 }
 
-- 
2.25.1