netdev - [PATCH RFC net-next v4 04/11] vsock: add net to vsock skb cb

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Message-Id: <20250616-vsock-vmtest-v4-4-bdd1659c33fb@meta.com>
Date: Mon, 16 Jun 2025 21:32:53 -0700
From: Bobby Eshleman <bobbyeshleman@...il.com>
To: Stefano Garzarella <sgarzare@...hat.com>, 
 Stefan Hajnoczi <stefanha@...hat.com>, Shuah Khan <shuah@...nel.org>
Cc: kvm@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
 linux-kernel@...r.kernel.org, virtualization@...ts.linux.dev, 
 netdev@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Bobby Eshleman <bobbyeshleman@...il.com>, 
 Bobby Eshleman <bobbyeshleman@...a.com>
Subject: [PATCH RFC net-next v4 04/11] vsock: add net to vsock skb cb

From: Bobby Eshleman <bobbyeshleman@...a.com>

Add a net pointer to the vsock skb and helpers for getting/setting it.
This is in preparation for adding vsock NS support.

Signed-off-by: Bobby Eshleman <bobbyeshleman@...a.com>
---
 include/linux/virtio_vsock.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
index 36fb3edfa403..93edc1e798a5 100644
--- a/include/linux/virtio_vsock.h
+++ b/include/linux/virtio_vsock.h
@@ -13,6 +13,7 @@ struct virtio_vsock_skb_cb {
 	bool reply;
 	bool tap_delivered;
 	u32 offset;
+	struct net *net;
 };

 #define VIRTIO_VSOCK_SKB_CB(skb) ((struct virtio_vsock_skb_cb *)((skb)->cb))
@@ -111,6 +112,16 @@ static inline size_t virtio_vsock_skb_len(struct sk_buff *skb)
 	return (size_t)(skb_end_pointer(skb) - skb->head);
 }

+static inline struct net *virtio_vsock_skb_net(struct sk_buff *skb)
+{
+	return VIRTIO_VSOCK_SKB_CB(skb)->net;
+}
+
+static inline void virtio_vsock_skb_set_net(struct sk_buff *skb, struct net *net)
+{
+	VIRTIO_VSOCK_SKB_CB(skb)->net = net;
+}
+
 #define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE	(1024 * 4)
 #define VIRTIO_VSOCK_MAX_BUF_SIZE		0xFFFFFFFFUL
 #define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE		(1024 * 64)

-- 
2.47.1