ipv6 addrconf: add IFA_F_NOPREFIXROUTE flag to suppress creation of IP6 routes
When adding/modifying an IPv6 address, the userspace application needs a way to suppress adding a prefix route. This is for example relevant together with IFA_F_MANAGERTEMPADDR, where userspace creates autoconf generated addresses, but depending on on-link, no route for the prefix should be added. Signed-off-by: Thomas Haller <thaller@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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6631c5cea8
Коммит
761aac737e
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@ -49,6 +49,7 @@ enum {
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#define IFA_F_TENTATIVE 0x40
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#define IFA_F_PERMANENT 0x80
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#define IFA_F_MANAGETEMPADDR 0x100
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#define IFA_F_NOPREFIXROUTE 0x200
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struct ifa_cacheinfo {
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__u32 ifa_prefered;
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@ -2434,8 +2434,11 @@ static int inet6_addr_add(struct net *net, int ifindex,
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valid_lft, prefered_lft);
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if (!IS_ERR(ifp)) {
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addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
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expires, flags);
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if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
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addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
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expires, flags);
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}
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/*
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* Note that section 3.1 of RFC 4429 indicates
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* that the Optimistic flag should not be set for
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@ -3662,7 +3665,8 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags,
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spin_lock_bh(&ifp->lock);
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was_managetempaddr = ifp->flags & IFA_F_MANAGETEMPADDR;
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ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD |
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IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR);
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IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
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IFA_F_NOPREFIXROUTE);
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ifp->flags |= ifa_flags;
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ifp->tstamp = jiffies;
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ifp->valid_lft = valid_lft;
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@ -3672,8 +3676,10 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags,
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if (!(ifp->flags&IFA_F_TENTATIVE))
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ipv6_ifa_notify(0, ifp);
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addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
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expires, flags);
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if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) {
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addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
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expires, flags);
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}
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if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) {
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if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR))
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@ -3727,7 +3733,8 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
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ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags;
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/* We ignore other flags so far. */
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ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR;
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ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR |
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IFA_F_NOPREFIXROUTE;
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ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
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if (ifa == NULL) {
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