在Linux系统中,网络驱动程序信号处理函数`ndo_start_xmit`是非常重要的一个函数。这个函数负责将数据包发送到网络设备进行传输。在Linux内核中有许多不同的网络设备,例如以太网卡、Wi-Fi模块等,它们都需要通过`ndo_start_xmit`函数来发送数据。 `ndo_start_xmit`函数的主要作用是将网络数据报传输给网络设备的硬件,这...
ndo_start_xmit函数的调用流程显然会涉及到多个环节和关键步骤。 一、发出发送请求 1.1 驱动层调用 在Linux内核网络层的设计中,网络设备的驱动程序承担着网络数据包发送和接收的任务。当上层应用需要发送数据包时,会调用网络套接字发送函数,将数据发送请求传递给网络协议栈。网络协议栈在处理发送请求时,会调用其对应...
[ Upstream commit d71ebe8 ] Commit a7766ef("virtio_net: disable cb aggressively") enables virtqueue callback via the following statement: do { if (use_napi) virtqueue_disable_cb(sq->vq); free_old_xmit_skbs(sq, false); } while (use_napi && kick && unlikely(!virtqueue_enable_cb_dela...
The ndo_start_xmit field in net_device_ops is expected to be of type netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev). The mismatched return type breaks forward edge kCFI since the underlying function definition does not match the function hook definition. The...
回答：调用参见:linux源码中 net\core\pktgen.c 中的pktgen_xmit函数的3227行,该函数负责向指定的网络接口发送数据包
1.你的结构net_dev_ops声明了.ndo_start_xmit =吗<your_start_xmit>？1.驱动程序中的某个例程是否...
Hi Roman, Although IFF_XMIT_DST_RELEASE has enabled in my code, I have disabled it and the same kernel panic occurs. [60576.286449] BUG: unable to handle kernel NULL pointer dereference at (null) [60576.286507] IP: [<f85eab7c>] myri10ge_xmit+0x42d/0x99b [myri10ge] [60576.286566] *...
> This patch adds skb_orphan to the start of dev_hard_start_xmit(): it > can be premature in the NETDEV_TX_BUSY case, but that's uncommon. Would it be possible to make the new skb_orphan() at the start of dev_hard_start_xmit() conditionally so that it is not executed for ...
netif_stop_queue(netdev);@@ -702,19 +713,6 @@ static netdev_tx_t usb_8dev_start_xmit(struct sk_buff *skb,return NETDEV_TX_BUSY;failed:can_free_echo_skb(netdev, context->echo_index);usb_unanchor_urb(urb);usb_free_coherent(priv->udev, size, buf, urb->transfer_dma);atomic...
<TASK> usbnet_start_xmit+0xfe5/0x2190 drivers/net/usb/usbnet.c:1453 __netdev_start_xmit include/linux/netdevice.h:4918 [inline] netdev_start_xmit include/linux/netdevice.h:4932 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x187/0x700 net/core/dev.c:3594 ....