Patch "ipvlan: properly track tx_errors" has been added to the 6.1-stable tree

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This is a note to let you know that I've just added the patch titled

    ipvlan: properly track tx_errors

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ipvlan-properly-track-tx_errors.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 776bafeadb005d151f25f6617b63d1f71a8392da
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date:   Thu Oct 26 13:14:46 2023 +0000

    ipvlan: properly track tx_errors
    
    [ Upstream commit ff672b9ffeb3f82135488ac16c5c5eb4b992999b ]
    
    Both ipvlan_process_v4_outbound() and ipvlan_process_v6_outbound()
    increment dev->stats.tx_errors in case of errors.
    
    Unfortunately there are two issues :
    
    1) ipvlan_get_stats64() does not propagate dev->stats.tx_errors to user.
    
    2) Increments are not atomic. KCSAN would complain eventually.
    
    Use DEV_STATS_INC() to not miss an update, and change ipvlan_get_stats64()
    to copy the value back to user.
    
    Fixes: 2ad7bf363841 ("ipvlan: Initial check-in of the IPVLAN driver.")
    Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
    Cc: Mahesh Bandewar <maheshb@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20231026131446.3933175-1-edumazet@xxxxxxxxxx
    Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index 59e29e08398a0..b29b7d97b7739 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -441,12 +441,12 @@ static int ipvlan_process_v4_outbound(struct sk_buff *skb)
 
 	err = ip_local_out(net, skb->sk, skb);
 	if (unlikely(net_xmit_eval(err)))
-		dev->stats.tx_errors++;
+		DEV_STATS_INC(dev, tx_errors);
 	else
 		ret = NET_XMIT_SUCCESS;
 	goto out;
 err:
-	dev->stats.tx_errors++;
+	DEV_STATS_INC(dev, tx_errors);
 	kfree_skb(skb);
 out:
 	return ret;
@@ -482,12 +482,12 @@ static int ipvlan_process_v6_outbound(struct sk_buff *skb)
 
 	err = ip6_local_out(net, skb->sk, skb);
 	if (unlikely(net_xmit_eval(err)))
-		dev->stats.tx_errors++;
+		DEV_STATS_INC(dev, tx_errors);
 	else
 		ret = NET_XMIT_SUCCESS;
 	goto out;
 err:
-	dev->stats.tx_errors++;
+	DEV_STATS_INC(dev, tx_errors);
 	kfree_skb(skb);
 out:
 	return ret;
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index cd16bc8bf154c..fbf2d5b67aafa 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -324,6 +324,7 @@ static void ipvlan_get_stats64(struct net_device *dev,
 		s->rx_dropped = rx_errs;
 		s->tx_dropped = tx_drps;
 	}
+	s->tx_errors = DEV_STATS_READ(dev, tx_errors);
 }
 
 static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)



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