[NETNS][IPV6] ndisc - make ndisc handle multiple network namespaces

Make ndisc handle multiple network namespaces:
Remove references to init_net, add network namespace parameters and add
pernet_operations for ndisc

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index e0d0233..a539b9e 100644 (file)
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -541,7 +541,7 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
        };
 
        /* for anycast or proxy, solicited_addr != src_addr */
-       ifp = ipv6_get_ifaddr(&init_net, solicited_addr, dev, 1);
+       ifp = ipv6_get_ifaddr(dev->nd_net, solicited_addr, dev, 1);
        if (ifp) {
                src_addr = solicited_addr;
                if (ifp->flags & IFA_F_OPTIMISTIC)
@@ -601,7 +601,7 @@ void ndisc_send_rs(struct net_device *dev, struct in6_addr *saddr,
         * suppress the inclusion of the sllao.
         */
        if (send_sllao) {
-               struct inet6_ifaddr *ifp = ipv6_get_ifaddr(&init_net, saddr,
+               struct inet6_ifaddr *ifp = ipv6_get_ifaddr(dev->nd_net, saddr,
                                                           dev, 1);
                if (ifp) {
                        if (ifp->flags & IFA_F_OPTIMISTIC)  {
@@ -639,7 +639,7 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb)
        struct in6_addr *target = (struct in6_addr *)&neigh->primary_key;
        int probes = atomic_read(&neigh->probes);
 
-       if (skb && ipv6_chk_addr(&init_net, &ipv6_hdr(skb)->saddr, dev, 1))
+       if (skb && ipv6_chk_addr(dev->nd_net, &ipv6_hdr(skb)->saddr, dev, 1))
                saddr = &ipv6_hdr(skb)->saddr;
 
        if ((probes -= neigh->parms->ucast_probes) < 0) {
@@ -727,7 +727,8 @@ static void ndisc_recv_ns(struct sk_buff *skb)
 
        inc = ipv6_addr_is_multicast(daddr);
 
-       if ((ifp = ipv6_get_ifaddr(&init_net, &msg->target, dev, 1)) != NULL) {
+       ifp = ipv6_get_ifaddr(dev->nd_net, &msg->target, dev, 1);
+       if (ifp) {
 
                if (ifp->flags & (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)) {
                        if (dad) {
@@ -775,7 +776,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
                if (ipv6_chk_acast_addr(dev, &msg->target) ||
                    (idev->cnf.forwarding &&
                     (ipv6_devconf.proxy_ndp || idev->cnf.proxy_ndp) &&
-                    (pneigh = pneigh_lookup(&nd_tbl, &init_net,
+                    (pneigh = pneigh_lookup(&nd_tbl, dev->nd_net,
                                             &msg->target, dev, 0)) != NULL)) {
                        if (!(NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED) &&
                            skb->pkt_type != PACKET_HOST &&
@@ -885,7 +886,8 @@ static void ndisc_recv_na(struct sk_buff *skb)
                        return;
                }
        }
-       if ((ifp = ipv6_get_ifaddr(&init_net, &msg->target, dev, 1))) {
+       ifp = ipv6_get_ifaddr(dev->nd_net, &msg->target, dev, 1);
+       if (ifp) {
                if (ifp->flags & IFA_F_TENTATIVE) {
                        addrconf_dad_failure(ifp);
                        return;
@@ -916,7 +918,7 @@ static void ndisc_recv_na(struct sk_buff *skb)
                 */
                if (lladdr && !memcmp(lladdr, dev->dev_addr, dev->addr_len) &&
                    ipv6_devconf.forwarding && ipv6_devconf.proxy_ndp &&
-                   pneigh_lookup(&nd_tbl, &init_net, &msg->target, dev, 0)) {
+                   pneigh_lookup(&nd_tbl, dev->nd_net, &msg->target, dev, 0)) {
                        /* XXX: idev->cnf.prixy_ndp */
                        goto out;
                }
@@ -1006,6 +1008,7 @@ static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt)
        struct sk_buff *skb;
        struct nlmsghdr *nlh;
        struct nduseroptmsg *ndmsg;
+       struct net *net = ra->dev->nd_net;
        int err;
        int base_size = NLMSG_ALIGN(sizeof(struct nduseroptmsg)
                                    + (opt->nd_opt_len << 3));
@@ -1035,7 +1038,7 @@ static void ndisc_ra_useropt(struct sk_buff *ra, struct nd_opt_hdr *opt)
                &ipv6_hdr(ra)->saddr);
        nlmsg_end(skb, nlh);
 
-       err = rtnl_notify(skb, &init_net, 0, RTNLGRP_ND_USEROPT, NULL,
+       err = rtnl_notify(skb, net, 0, RTNLGRP_ND_USEROPT, NULL,
                          GFP_ATOMIC);
        if (err < 0)
                goto errout;
@@ -1046,7 +1049,7 @@ nla_put_failure:
        nlmsg_free(skb);
        err = -EMSGSIZE;
 errout:
-       rtnl_set_sk_err(&init_net, RTNLGRP_ND_USEROPT, err);
+       rtnl_set_sk_err(net, RTNLGRP_ND_USEROPT, err);
 }
 
 static void ndisc_router_discovery(struct sk_buff *skb)
@@ -1600,9 +1603,6 @@ static int ndisc_netdev_event(struct notifier_block *this, unsigned long event,
        struct net_device *dev = ptr;
        struct net *net = dev->nd_net;
 
-       if (dev->nd_net != &init_net)
-               return NOTIFY_DONE;
-
        switch (event) {
        case NETDEV_CHANGEADDR:
                neigh_changeaddr(&nd_tbl, dev);