From: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx> Date: Thu, 15 Jan 2015 15:11:14 +0100 > The goal of this serie is to be able to multicast netlink messages with an > attribute that identify a peer netns. > This is needed by the userland to interpret some information contained in > netlink messages (like IFLA_LINK value, but also some other attributes in case > of x-netns netdevice (see also > http://thread.gmane.org/gmane.linux.network/315933/focus=316064 and > http://thread.gmane.org/gmane.linux.kernel.containers/28301/focus=4239)). > > Ids of peer netns can be set by userland via a new rtnl cmd RTM_NEWNSID. When > the kernel needs an id for a peer (for example when advertising a new x-netns > interface via netlink), if the user didn't allocate an id, one will be > automatically allocated. > These ids are stored per netns and are local (ie only valid in the netns where > they are set). To avoid allocating an int for each peer netns, I use > idr_for_each() to retrieve the id of a peer netns. Note that it will be possible > to add a table (struct net -> id) later to optimize this lookup if needed. > > Patch 1/4 introduces the rtnetlink API mechanism to set and get these ids. > Patch 2/4 and 3/4 implements an example of how to use these ids when advertising > information about a x-netns interface. > And patch 4/4 shows that the netlink messages can be symetric between a GET and > a SET. ... Seires applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
