diff options
| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2012-10-25 22:28:51 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-10-28 19:05:00 -0400 |
| commit | 76f8f6cb76b110aaace90b6208b1ceb46bd78b7f (patch) | |
| tree | 0b70420e29479970155518d8ac3f147bf652328e | |
| parent | f3a1bfb11ccbc72d44f0b58c92115a40128979c3 (diff) | |
rtnl/ipv6: add support of RTM_GETNETCONF
This message allows to get the devconf for an interface.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/addrconf.c | 75 |
1 files changed, 73 insertions, 2 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 0c57a8f6771..8f0b12a6713 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -466,7 +466,8 @@ static int inet6_netconf_msgsize_devconf(int type) int size = NLMSG_ALIGN(sizeof(struct netconfmsg)) + nla_total_size(4); /* NETCONFA_IFINDEX */ - if (type == NETCONFA_FORWARDING) + /* type -1 is used for ALL */ + if (type == -1 || type == NETCONFA_FORWARDING) size += nla_total_size(4); return size; @@ -491,7 +492,8 @@ static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex, if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0) goto nla_put_failure; - if (type == NETCONFA_FORWARDING && + /* type -1 is used for ALL */ + if ((type == -1 || type == NETCONFA_FORWARDING) && nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0) goto nla_put_failure; @@ -527,6 +529,73 @@ errout: rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err); } +static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = { + [NETCONFA_IFINDEX] = { .len = sizeof(int) }, + [NETCONFA_FORWARDING] = { .len = sizeof(int) }, +}; + +static int inet6_netconf_get_devconf(struct sk_buff *in_skb, + struct nlmsghdr *nlh, + void *arg) +{ + struct net *net = sock_net(in_skb->sk); + struct nlattr *tb[NETCONFA_MAX+1]; + struct netconfmsg *ncm; + struct sk_buff *skb; + struct ipv6_devconf *devconf; + struct inet6_dev *in6_dev; + struct net_device *dev; + int ifindex; + int err; + + err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX, + devconf_ipv6_policy); + if (err < 0) + goto errout; + + err = EINVAL; + if (!tb[NETCONFA_IFINDEX]) + goto errout; + + ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]); + switch (ifindex) { + case NETCONFA_IFINDEX_ALL: + devconf = net->ipv6.devconf_all; + break; + case NETCONFA_IFINDEX_DEFAULT: + devconf = net->ipv6.devconf_dflt; + break; + default: + dev = __dev_get_by_index(net, ifindex); + if (dev == NULL) + goto errout; + in6_dev = __in6_dev_get(dev); + if (in6_dev == NULL) + goto errout; + devconf = &in6_dev->cnf; + break; + } + + err = -ENOBUFS; + skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC); + if (skb == NULL) + goto errout; + + err = inet6_netconf_fill_devconf(skb, ifindex, devconf, + NETLINK_CB(in_skb).portid, + nlh->nlmsg_seq, RTM_NEWNETCONF, 0, + -1); + if (err < 0) { + /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */ + WARN_ON(err == -EMSGSIZE); + kfree_skb(skb); + goto errout; + } + err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); +errout: + return err; +} + #ifdef CONFIG_SYSCTL static void dev_forward_change(struct inet6_dev *idev) { @@ -4861,6 +4930,8 @@ int __init addrconf_init(void) inet6_dump_ifmcaddr, NULL); __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr, NULL); + __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf, + NULL, NULL); ipv6_addr_label_rtnl_register(); |