Replace kfree_skb() with kfree_skb_reason() in vxlan_xmit(). Following
new skb drop reasons are introduced for vxlan:

/* no remote found for xmit */
SKB_DROP_REASON_VXLAN_NO_REMOTE
/* packet without necessary metatdata reached a device is in "eternal"
 * mode.
 */
SKB_DROP_REASON_TUNNEL_TXINFO

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Reviewed-by: Simon Horman <horms@kernel.org>
---
v5:
- modify the document for SKB_DROP_REASON_TUNNEL_TXINFO
v2:
- move the drop reason "TXINFO" from vxlan to core
- rename VXLAN_DROP_REMOTE to VXLAN_DROP_NO_REMOTE
---
 drivers/net/vxlan/vxlan_core.c | 6 +++---
 include/net/dropreason-core.h  | 8 ++++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 41191a28252a..b677ec901807 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2730,7 +2730,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 			if (info && info->mode & IP_TUNNEL_INFO_TX)
 				vxlan_xmit_one(skb, dev, vni, NULL, false);
 			else
-				kfree_skb(skb);
+				kfree_skb_reason(skb, SKB_DROP_REASON_TUNNEL_TXINFO);
 			return NETDEV_TX_OK;
 		}
 	}
@@ -2793,7 +2793,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 			dev_core_stats_tx_dropped_inc(dev);
 			vxlan_vnifilter_count(vxlan, vni, NULL,
 					      VXLAN_VNI_STATS_TX_DROPS, 0);
-			kfree_skb(skb);
+			kfree_skb_reason(skb, SKB_DROP_REASON_VXLAN_NO_REMOTE);
 			return NETDEV_TX_OK;
 		}
 	}
@@ -2816,7 +2816,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 		if (fdst)
 			vxlan_xmit_one(skb, dev, vni, fdst, did_rsc);
 		else
-			kfree_skb(skb);
+			kfree_skb_reason(skb, SKB_DROP_REASON_VXLAN_NO_REMOTE);
 	}
 
 	return NETDEV_TX_OK;
diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h
index fbf92d442c1b..0a2407e7e93f 100644
--- a/include/net/dropreason-core.h
+++ b/include/net/dropreason-core.h
@@ -96,7 +96,9 @@
 	FN(VXLAN_VNI_NOT_FOUND)		\
 	FN(MAC_INVALID_SOURCE)		\
 	FN(VXLAN_ENTRY_EXISTS)		\
+	FN(VXLAN_NO_REMOTE)		\
 	FN(IP_TUNNEL_ECN)		\
+	FN(TUNNEL_TXINFO)		\
 	FN(LOCAL_MAC)			\
 	FNe(MAX)
 
@@ -439,11 +441,17 @@ enum skb_drop_reason {
 	 * entry or an entry pointing to a nexthop.
 	 */
 	SKB_DROP_REASON_VXLAN_ENTRY_EXISTS,
+	/** @SKB_DROP_REASON_VXLAN_NO_REMOTE: no remote found for xmit */
+	SKB_DROP_REASON_VXLAN_NO_REMOTE,
 	/**
 	 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to
 	 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail.
 	 */
 	SKB_DROP_REASON_IP_TUNNEL_ECN,
+	/** @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metatdata
+	 * reached a device is in "eternal" mode.
+	 */
+	SKB_DROP_REASON_TUNNEL_TXINFO,
 	/**
 	 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to
 	 * the MAC address of the local netdev.
-- 
2.39.5

On Sun, Oct 06, 2024 at 02:56:12PM +0800, Menglong Dong wrote:
> Replace kfree_skb() with kfree_skb_reason() in vxlan_xmit(). Following
> new skb drop reasons are introduced for vxlan:
> 
> /* no remote found for xmit */
> SKB_DROP_REASON_VXLAN_NO_REMOTE
> /* packet without necessary metatdata reached a device is in "eternal"
>  * mode.
>  */
> SKB_DROP_REASON_TUNNEL_TXINFO

nit: metadata

     Flagged by checkpatch.pl --codespell

> 
> Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
> Reviewed-by: Simon Horman <horms@kernel.org>

...

> diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h

...

> @@ -439,11 +441,17 @@ enum skb_drop_reason {
>  	 * entry or an entry pointing to a nexthop.
>  	 */
>  	SKB_DROP_REASON_VXLAN_ENTRY_EXISTS,
> +	/** @SKB_DROP_REASON_VXLAN_NO_REMOTE: no remote found for xmit */
> +	SKB_DROP_REASON_VXLAN_NO_REMOTE,
>  	/**
>  	 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to
>  	 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail.
>  	 */
>  	SKB_DROP_REASON_IP_TUNNEL_ECN,
> +	/** @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metatdata
> +	 * reached a device is in "eternal" mode.
> +	 */
> +	SKB_DROP_REASON_TUNNEL_TXINFO,

nit: ./scripts/kernel-doc would like this to be formatted as follows.
     And metadata is misspelt.

	/**
	 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata
	 * reached a device is in "eternal" mode.
	 */
	SKB_DROP_REASON_TUNNEL_TXINFO,

>  	/**
>  	 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to
>  	 * the MAC address of the local netdev.
> -- 
> 2.39.5
>

On Tue, Oct 8, 2024 at 8:28 PM Simon Horman <horms@kernel.org> wrote:
>
> On Sun, Oct 06, 2024 at 02:56:12PM +0800, Menglong Dong wrote:
> > Replace kfree_skb() with kfree_skb_reason() in vxlan_xmit(). Following
> > new skb drop reasons are introduced for vxlan:
> >
> > /* no remote found for xmit */
> > SKB_DROP_REASON_VXLAN_NO_REMOTE
> > /* packet without necessary metatdata reached a device is in "eternal"
> >  * mode.
> >  */
> > SKB_DROP_REASON_TUNNEL_TXINFO
>
> nit: metadata
>
>      Flagged by checkpatch.pl --codespell
>
> >
> > Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
> > Reviewed-by: Simon Horman <horms@kernel.org>
>
> ...
>
> > diff --git a/include/net/dropreason-core.h b/include/net/dropreason-core.h
>
> ...
>
> > @@ -439,11 +441,17 @@ enum skb_drop_reason {
> >        * entry or an entry pointing to a nexthop.
> >        */
> >       SKB_DROP_REASON_VXLAN_ENTRY_EXISTS,
> > +     /** @SKB_DROP_REASON_VXLAN_NO_REMOTE: no remote found for xmit */
> > +     SKB_DROP_REASON_VXLAN_NO_REMOTE,
> >       /**
> >        * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to
> >        * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail.
> >        */
> >       SKB_DROP_REASON_IP_TUNNEL_ECN,
> > +     /** @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metatdata
> > +      * reached a device is in "eternal" mode.
> > +      */
> > +     SKB_DROP_REASON_TUNNEL_TXINFO,
>
> nit: ./scripts/kernel-doc would like this to be formatted as follows.
>      And metadata is misspelt.
>

Hello, thanks for reminding me. It seems that there is no
more comment on this series, and I'll send a V6 now to
fix this problem.

Thanks!
Menglong Dong

>         /**
>          * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata
>          * reached a device is in "eternal" mode.
>          */
>         SKB_DROP_REASON_TUNNEL_TXINFO,
>
> >       /**
> >        * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to
> >        * the MAC address of the local netdev.
> > --
> > 2.39.5
> >

On Sun, Oct 06, 2024 at 02:56:12PM +0800, Menglong Dong wrote:
> +	/** @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metatdata
> +	 * reached a device is in "eternal" mode.

Maybe 'a device which is in "external" mode.' instead?

> +	 */
> +	SKB_DROP_REASON_TUNNEL_TXINFO,
>  	/**
>  	 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to
>  	 * the MAC address of the local netdev.
> -- 
> 2.39.5
>

On Sun, Oct 6, 2024 at 4:53 PM Guillaume Nault <gnault@redhat.com> wrote:
>
> On Sun, Oct 06, 2024 at 02:56:12PM +0800, Menglong Dong wrote:
> > +     /** @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metatdata
> > +      * reached a device is in "eternal" mode.
>
> Maybe 'a device which is in "external" mode.' instead?

Yeah, there are some typos in this document. I'll
fix it in the next version.

Thanks!
Menglong Dong

>
> > +      */
> > +     SKB_DROP_REASON_TUNNEL_TXINFO,
> >       /**
> >        * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to
> >        * the MAC address of the local netdev.
> > --
> > 2.39.5
> >
>