netdev - [RFC PATCH net-next 01/11] vxlan: In vxlan_rcv(), access flags through the vxlan netdevice

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Message-ID: <c890e76d13543021e20f7d5c1a3e2ebcdd677974.1731941465.git.petrm@nvidia.com>
Date: Mon, 18 Nov 2024 17:43:07 +0100
From: Petr Machata <petrm@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, <netdev@...r.kernel.org>
CC: Simon Horman <horms@...nel.org>, Ido Schimmel <idosch@...dia.com>, "Petr
 Machata" <petrm@...dia.com>, <mlxsw@...dia.com>, Andrew Lunn
	<andrew+netdev@...n.ch>, Menglong Dong <menglong8.dong@...il.com>, "Guillaume
 Nault" <gnault@...hat.com>, Alexander Lobakin <aleksander.lobakin@...el.com>,
	Breno Leitao <leitao@...ian.org>
Subject: [RFC PATCH net-next 01/11] vxlan: In vxlan_rcv(), access flags through the vxlan netdevice

vxlan_sock.flags is constructed from vxlan_dev.cfg.flags, as the subset of
flags (named VXLAN_F_RCV_FLAGS) that is important from the point of view of
socket sharing. Attempts to reconfigure these flags during the vxlan netdev
lifetime are also bounced. It is therefore immaterial whether we access the
flags through the vxlan_dev or through the socket.

Convert the socket accesses to netdevice accesses in this separate patch to
make the conversions that take place in the following patches more obvious.

Signed-off-by: Petr Machata <petrm@...dia.com>
Reviewed-by: Ido Schimmel <idosch@...dia.com>
---

Notes:
CC: Andrew Lunn <andrew+netdev@...n.ch>
CC: Menglong Dong <menglong8.dong@...il.com>
CC: Guillaume Nault <gnault@...hat.com>
CC: Alexander Lobakin <aleksander.lobakin@...el.com>
CC: Breno Leitao <leitao@...ian.org>

 drivers/net/vxlan/vxlan_core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index edef32a593c3..071d82a0e9f3 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -1717,7 +1717,7 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 	/* For backwards compatibility, only allow reserved fields to be
 	 * used by VXLAN extensions if explicitly requested.
 	 */
-	if (vs->flags & VXLAN_F_GPE) {
+	if (vxlan->cfg.flags & VXLAN_F_GPE) {
 		if (!vxlan_parse_gpe_proto(&unparsed, &protocol))
 			goto drop;
 		unparsed.vx_flags &= ~VXLAN_GPE_USED_BITS;
@@ -1730,8 +1730,8 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 		goto drop;
 	}
 
-	if (vs->flags & VXLAN_F_REMCSUM_RX) {
-		reason = vxlan_remcsum(&unparsed, skb, vs->flags);
+	if (vxlan->cfg.flags & VXLAN_F_REMCSUM_RX) {
+		reason = vxlan_remcsum(&unparsed, skb, vxlan->cfg.flags);
 		if (unlikely(reason))
 			goto drop;
 	}
@@ -1756,8 +1756,8 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 		memset(md, 0, sizeof(*md));
 	}
 
-	if (vs->flags & VXLAN_F_GBP)
-		vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
+	if (vxlan->cfg.flags & VXLAN_F_GBP)
+		vxlan_parse_gbp_hdr(&unparsed, skb, vxlan->cfg.flags, md);
 	/* Note that GBP and GPE can never be active together. This is
 	 * ensured in vxlan_dev_configure.
 	 */
-- 
2.47.0