From 0caa9a8ddec3bf87bffb0eb99635068ddddce35d Mon Sep 17 00:00:00 2001 From: David Wei Date: Thu, 15 Jan 2026 09:25:52 +0100 Subject: net: Proxy net_mp_{open,close}_rxq for leased queues When a process in a container wants to setup a memory provider, it will use the virtual netdev and a leased rxq, and call net_mp_{open,close}_rxq to try and restart the queue. At this point, proxy the queue restart on the real rxq in the physical netdev. For memory providers (io_uring zero-copy rx and devmem), it causes the real rxq in the physical netdev to be filled from a memory provider that has DMA mapped memory from a process within a container. Signed-off-by: David Wei Co-developed-by: Daniel Borkmann Signed-off-by: Daniel Borkmann Reviewed-by: Nikolay Aleksandrov Acked-by: Stanislav Fomichev Link: https://patch.msgid.link/20260115082603.219152-6-daniel@iogearbox.net Signed-off-by: Paolo Abeni --- include/net/netdev_rx_queue.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/net/netdev_rx_queue.h') diff --git a/include/net/netdev_rx_queue.h b/include/net/netdev_rx_queue.h index de04fdfdad72..508d11afaecb 100644 --- a/include/net/netdev_rx_queue.h +++ b/include/net/netdev_rx_queue.h @@ -73,4 +73,8 @@ enum netif_lease_dir { struct netdev_rx_queue * __netif_get_rx_queue_lease(struct net_device **dev, unsigned int *rxq, enum netif_lease_dir dir); +struct netdev_rx_queue * +netif_get_rx_queue_lease_locked(struct net_device **dev, unsigned int *rxq); +void netif_put_rx_queue_lease_locked(struct net_device *orig_dev, + struct net_device *dev); #endif /* _LINUX_NETDEV_RX_QUEUE_H */ -- cgit v1.2.3