IPv4 route fib table insert
0.0.0.1. summarytodo!!
Kernel Study Notes
IPv4 route fib find node
0.0.1. summary遍历路由树，查找是否存在key这条路由。如果有则返回对应的节点 struct leaf *，否则返回NULL。 0.0.1.1. 中间节点 和 叶子节点路由树（fib lc tree)是个多叉树,树的每个节点是struct rt_trie_node。每个节点的分叉个数(X)是可变的， 由 struct rt_trie_node里的bits决定。 X = 2
pfn_to_page and page_to_pfn
0.0.1. summarypage_to_pfn and pfn_to_page are often used in kernel. for PP81, kernel uses CONFIG_DISCONTIGMEM + NUMA.Every node has node_mem_map and node_start_pfnto help the page/pfn covertion.n
How does xfrm km work
0.0.1. summaryThere is a list xfrm_km_list in kernel.Each node of the list is struct xfrm_mgr,which has several methods to notify usersapce by netlink message.Different methods has corresponding metho
IPv4 route study part 1: basic fun
In order to understand kernel route LC-Trie,summary the basic functions here.
debug kernel with jprobe
0.1. kprobe is a useful tool when debug kernel.It can directly hook the related function of kernel,before or after it run. It also can be used to patch kernel in some special case.
how to use git bisect
0.1. usage:In version management, we often meet this case: 123When a line/file is deleted for git repo?or who did it ? In this case, we need git bisect. git bisect start git bisect good commit_id1 gi
Where is IPv6 route cache
0.1. Q: Does kernel IPv6 route support route cache ? yes. but it is very different with IPv4. It should be ‘clone’ strictly speaking. For simple let us only focus on ip6_pol_route, and variable st