netdev - [PATCH net-next v2 05/15] bnxt_en: Do not accept fragments for aRFS flow steering.

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Message-Id: <1580118987-30052-6-git-send-email-michael.chan@broadcom.com>
Date:   Mon, 27 Jan 2020 04:56:17 -0500
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org
Subject: [PATCH net-next v2 05/15] bnxt_en: Do not accept fragments for aRFS flow steering.

In bnxt_rx_flow_steer(), if the dissected packet is a fragment, do not
proceed to create the ntuple filter and return error instead.  Otherwise
we would create a filter with 0 source and destination ports because
the dissected ports would not be available for fragments.

Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index fb4a65f..fb67e66 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -11100,6 +11100,7 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 	struct ethhdr *eth = (struct ethhdr *)skb_mac_header(skb);
 	int rc = 0, idx, bit_id, l2_idx = 0;
 	struct hlist_head *head;
+	u32 flags;

 	if (!ether_addr_equal(dev->dev_addr, eth->h_dest)) {
 		struct bnxt_vnic_info *vnic = &bp->vnic_info[0];
@@ -11139,8 +11140,9 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 		rc = -EPROTONOSUPPORT;
 		goto err_free;
 	}
-	if ((fkeys->control.flags & FLOW_DIS_ENCAPSULATION) &&
-	    bp->hwrm_spec_code < 0x10601) {
+	flags = fkeys->control.flags;
+	if (((flags & FLOW_DIS_ENCAPSULATION) &&
+	     bp->hwrm_spec_code < 0x10601) || (flags & FLOW_DIS_IS_FRAGMENT)) {
 		rc = -EPROTONOSUPPORT;
 		goto err_free;
 	}
-- 
2.5.1