The u32 classifier The U32 filter is the most advanced filter available in the current implementation. It entirely based on hashing tables, which make it robust when there are many filter rules. In its simplest form the U32 filter is a list of record…

u32过滤器一般使用ip地址作为匹配规则,但按照其定义,它可以匹配ip包头的任意地址,这里使用mac地址限制局域网的下载速度,避免客户端修改ip后其下载速度得不到控制.tc qdisc del dev eth2 roottc qdisc add dev eth2 root handle 200: cbq bandwidth 10Mbit avpkt 1000tc class add dev eth2 parent 200:0 classid 200:1 cbq bandwidth 10Mbit…

Ingress qdisc All qdiscs discussed so far are egress qdiscs. Each interface however can also have an ingress qdisc which is not used to send packets out to the network adaptor. Instead, it allows you to apply tc filters to packets coming in over the…

摘要:本文是参考大量网上资源在结合自己查看源代码总结出来的,让自己同时也让大家加深对Android系统启动过程有一个更加深入的了解!再次强调,本文的大多数功劳应归功于那些原创者们,同时一些必要的参考链接我会一一附上. 注:由于本人采用Exynos4412开发板学习,所以本文大部分资料都是基于此处理器的 简介:对于整个Android系统的启动总的来说分为三个阶段: BootLoader引导即uBoot.bin linux内核启动即zImage Android系统启动即ramdisk.img与sys…

root@Taiyear:/# U-Boot 1.1.3 (Dec 27 2013 - 09:14:28) SoC:MediaTek MT7620 DRAM:  Memory Testing..65536K OK. is 64 MB relocate_code Pointer at: 83fac000 enable ephy clock...done. rf reg 29 = 5 SSC disabled. spi_wait_nsec: 14 spi device id: ef 40 18 0…

1. Introduction HTB is meant as a more understandable, intuitive and faster replacement for the CBQ qdisc in Linux. Both CBQ and HTB help you to control the use of the outbound bandwidth on a given link. Both allow you to use one physical link to sim…

一.替代arp, ifconfig, route等命令 显示网卡和IP地址 root@openstack:~# ip link list 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1…

tiny210V2开发板hdmi输出到10.1寸LCD,无图像... 用tiny210V2开发板的HDMI接口输出到的10.1寸LCD,LCD无任何现象.说明一下我的情况,我的10.1寸屏LCD是HDMI接口的,我用HDMI连接我的笔记本,信号一切输出正常(也就是说笔记本的HDMI输出能点亮我的10.1寸LCD屏),但我用TINY210V2来做,却行不通,LCD上什么都看不到.然后我将tiny210V2连接我的三星液晶电视输出到电视,却是可以的(设置为720P).但当我把HDMI连接线从电视拔到…

void procd_inittab(void) { #define LINE_LEN 128 FILE *fp = fopen(tab, "r"); struct init_action *a; regex_t pat_inittab; regmatch_t matches[5]; char *line; if (!fp) { ERROR("Failed to open %s\n", tab); return; } regcomp(&pat_inittab…

Android USB驱动中,上层应用协议里最重要的一个文件是android/kernel/drivers/usb/gadget/android.c.这个文件实现USB的上层应用协议. 首先包含了一些系统级别的头文件,如模块.电源管理.of API等 /* * Gadget Driver for Android * * Copyright (C) 2008 Google, Inc. *.Copyright (c) 2014, The Linux Foundation. All rights re…