[NETNS]: Add netns to nl_info structure.

nl_info is used to track the end-user destination of routing change
notification. This is a natural object to hold a namespace on. Place
it there and utilize the context in the appropriate places.

Acked-by: Benjamin Thery <benjamin.thery@bull.net>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 25 insertions, 9 deletions

diff --git a/include/net/netlink.h b/include/net/netlink.h
index a52d03601754..a5e6d0ef51dd 100644
--- a/include/net/netlink.h
+++ b/include/net/netlink.h
@@ -217,6 +217,7 @@ struct nla_policy {
  */
 struct nl_info {
         struct nlmsghdr         *nlh;
+        struct net              *nl_net;
         u32                     pid;
 };
 
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index d1a45cb6f6b0..90aa05f47f8e 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -310,6 +310,7 @@ static int rtentry_to_fib_config(int cmd, struct rtentry *rt,
         int plen;
 
         memset(cfg, 0, sizeof(*cfg));
+        cfg->fc_nlinfo.nl_net = &init_net;
 
         if (rt->rt_dst.sa_family != AF_INET)
                 return -EAFNOSUPPORT;
@@ -516,6 +517,7 @@ static int rtm_to_fib_config(struct sk_buff *skb, struct nlmsghdr *nlh,
 
         cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid;
         cfg->fc_nlinfo.nlh = nlh;
+        cfg->fc_nlinfo.nl_net = &init_net;
 
         if (cfg->fc_type > RTN_MAX) {
                 err = -EINVAL;
@@ -670,6 +672,9 @@ static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifad
                 .fc_prefsrc = ifa->ifa_local,
                 .fc_oif = ifa->ifa_dev->dev->ifindex,
                 .fc_nlflags = NLM_F_CREATE | NLM_F_APPEND,
+                .fc_nlinfo = {
+                        .nl_net = &init_net,
+                },
         };
 
         if (type == RTN_UNICAST)
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index c1263e23876b..0de6102020e2 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -320,11 +320,11 @@ void rtmsg_fib(int event, __be32 key, struct fib_alias *fa,
                 kfree_skb(skb);
                 goto errout;
         }
-        err = rtnl_notify(skb, &init_net, info->pid, RTNLGRP_IPV4_ROUTE,
+        err = rtnl_notify(skb, info->nl_net, info->pid, RTNLGRP_IPV4_ROUTE,
                           info->nlh, GFP_KERNEL);
 errout:
         if (err < 0)
-                rtnl_set_sk_err(&init_net, RTNLGRP_IPV4_ROUTE, err);
+                rtnl_set_sk_err(info->nl_net, RTNLGRP_IPV4_ROUTE, err);
 }
 
 /* Return the first fib alias matching TOS with
@@ -531,9 +531,11 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
 
                         if (cfg->fc_scope >= RT_SCOPE_LINK)
                                 return -EINVAL;
-                        if (inet_addr_type(&init_net, nh->nh_gw) != RTN_UNICAST)
+                        if (inet_addr_type(cfg->fc_nlinfo.nl_net,
+                                           nh->nh_gw) != RTN_UNICAST)
                                 return -EINVAL;
-                        if ((dev = __dev_get_by_index(&init_net, nh->nh_oif)) == NULL)
+                        if ((dev = __dev_get_by_index(cfg->fc_nlinfo.nl_net,
+                                                      nh->nh_oif)) == NULL)
                                 return -ENODEV;
                         if (!(dev->flags&IFF_UP))
                                 return -ENETDOWN;
@@ -795,7 +797,8 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
                 if (nhs != 1 || nh->nh_gw)
                         goto err_inval;
                 nh->nh_scope = RT_SCOPE_NOWHERE;
-                nh->nh_dev = dev_get_by_index(&init_net, fi->fib_nh->nh_oif);
+                nh->nh_dev = dev_get_by_index(cfg->fc_nlinfo.nl_net,
+                                              fi->fib_nh->nh_oif);
                 err = -ENODEV;
                 if (nh->nh_dev == NULL)
                         goto failure;
@@ -809,7 +812,8 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
         if (fi->fib_prefsrc) {
                 if (cfg->fc_type != RTN_LOCAL || !cfg->fc_dst ||
                     fi->fib_prefsrc != cfg->fc_dst)
-                        if (inet_addr_type(&init_net, fi->fib_prefsrc) != RTN_LOCAL)
+                        if (inet_addr_type(cfg->fc_nlinfo.nl_net,
+                                           fi->fib_prefsrc) != RTN_LOCAL)
                                 goto err_inval;
         }
 
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 0e83164aa3e6..f93407cf6515 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -1314,7 +1314,9 @@ static int fib6_walk(struct fib6_walker_t *w)
 
 static int fib6_clean_node(struct fib6_walker_t *w)
 {
-        struct nl_info info = {};
+        struct nl_info info = {
+                .nl_net = &init_net,
+        };
         int res;
         struct rt6_info *rt;
         struct fib6_cleaner_t *c = container_of(w, struct fib6_cleaner_t, w);
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index d2b3cf695aff..48c8d7cb9020 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -601,7 +601,9 @@ static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info)
 
 int ip6_ins_rt(struct rt6_info *rt)
 {
-        struct nl_info info = {};
+        struct nl_info info = {
+                .nl_net = &init_net,
+        };
         return __ip6_ins_rt(rt, &info);
 }
 
@@ -1259,7 +1261,9 @@ static int __ip6_del_rt(struct rt6_info *rt, struct nl_info *info)
 
 int ip6_del_rt(struct rt6_info *rt)
 {
-        struct nl_info info = {};
+        struct nl_info info = {
+                .nl_net = &init_net,
+        };
         return __ip6_del_rt(rt, &info);
 }