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netlink: support setting devgroup parameters
If a rtnetlink request specifies a negative or zero ifindex and has no interface name attribute, but has a group attribute, then the chenges are made to all the interfaces belonging to the specified group. Signed-off-by: Vlad Dogaru <ddvlad@rosedu.org> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
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cbda10fa97
commit
e7ed828f10
1 changed files with 28 additions and 4 deletions
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@ -1558,6 +1558,24 @@ struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
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}
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EXPORT_SYMBOL(rtnl_create_link);
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static int rtnl_group_changelink(struct net *net, int group,
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struct ifinfomsg *ifm,
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struct nlattr **tb)
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{
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struct net_device *dev;
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int err;
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for_each_netdev(net, dev) {
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if (dev->group == group) {
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err = do_setlink(dev, ifm, tb, NULL, 0);
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if (err < 0)
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return err;
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}
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}
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return 0;
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}
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static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
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{
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struct net *net = sock_net(skb->sk);
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@ -1585,10 +1603,16 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
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ifm = nlmsg_data(nlh);
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if (ifm->ifi_index > 0)
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dev = __dev_get_by_index(net, ifm->ifi_index);
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else if (ifname[0])
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dev = __dev_get_by_name(net, ifname);
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else
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dev = NULL;
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else {
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if (ifname[0])
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dev = __dev_get_by_name(net, ifname);
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else if (tb[IFLA_GROUP])
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return rtnl_group_changelink(net,
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nla_get_u32(tb[IFLA_GROUP]),
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ifm, tb);
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else
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dev = NULL;
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}
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err = validate_linkmsg(dev, tb);
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if (err < 0)
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