netdev - [PATCH net v2 7/8] i40e: Fix add TC filter for IPv6

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Date:   Fri, 19 Feb 2021 13:36:05 -0800
From:   Tony Nguyen <anthony.l.nguyen@...el.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     Mateusz Palczewski <mateusz.palczewski@...el.com>,
        netdev@...r.kernel.org, sassmann@...hat.com,
        anthony.l.nguyen@...el.com,
        Grzegorz Szczurek <grzegorzx.szczurek@...el.com>,
        Jaroslaw Gawin <jaroslawx.gawin@...el.com>,
        Tony Brelinski <tonyx.brelinski@...el.com>
Subject: [PATCH net v2 7/8] i40e: Fix add TC filter for IPv6

From: Mateusz Palczewski <mateusz.palczewski@...el.com>

Fix insufficient distinction between IPv4 and IPv6 addresses
when creating a filter.
IPv4 and IPv6 are kept in the same memory area. If IPv6 is added,
then it's caught by IPv4 check, which leads to err -95.

Fixes: 2f4b411a3d67 ("i40e: Enable cloud filters via tc-flower")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@...el.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@...el.com>
Reviewed-by: Jaroslaw Gawin <jaroslawx.gawin@...el.com>
Tested-by: Tony Brelinski <tonyx.brelinski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 2e22ab5a0f9a..3e4a4d6f0419 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -7731,7 +7731,8 @@ int i40e_add_del_cloud_filter_big_buf(struct i40e_vsi *vsi,
 		return -EOPNOTSUPP;
 
 	/* adding filter using src_port/src_ip is not supported at this stage */
-	if (filter->src_port || filter->src_ipv4 ||
+	if (filter->src_port ||
+	    (filter->src_ipv4 && filter->n_proto != ETH_P_IPV6) ||
 	    !ipv6_addr_any(&filter->ip.v6.src_ip6))
 		return -EOPNOTSUPP;
 
@@ -7760,7 +7761,7 @@ int i40e_add_del_cloud_filter_big_buf(struct i40e_vsi *vsi,
 			cpu_to_le16(I40E_AQC_ADD_CLOUD_FILTER_MAC_VLAN_PORT);
 		}
 
-	} else if (filter->dst_ipv4 ||
+	} else if ((filter->dst_ipv4 && filter->n_proto != ETH_P_IPV6) ||
 		   !ipv6_addr_any(&filter->ip.v6.dst_ip6)) {
 		cld_filter.element.flags =
 				cpu_to_le16(I40E_AQC_ADD_CLOUD_FILTER_IP_PORT);
-- 
2.26.2