1 files changed, 129 insertions, 15 deletions

diff --git a/net/tipc/net.c b/net/tipc/net.c
index 93b9944a6a8b..a54f3cbe2246 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -40,7 +40,11 @@
 #include "subscr.h"
 #include "socket.h"
 #include "node.h"
-#include "config.h"
+
+static const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
+        [TIPC_NLA_NET_UNSPEC]   = { .type = NLA_UNSPEC },
+        [TIPC_NLA_NET_ID]       = { .type = NLA_U32 }
+};
 
 /*
  * The TIPC locking policy is designed to ensure a very fine locking
@@ -103,38 +107,148 @@
  *     - A local spin_lock protecting the queue of subscriber events.
 */
 
-int tipc_net_start(u32 addr)
+int tipc_net_start(struct net *net, u32 addr)
 {
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
         char addr_string[16];
         int res;
 
-        tipc_own_addr = addr;
-        tipc_named_reinit();
-        tipc_sk_reinit();
-        res = tipc_bclink_init();
+        tn->own_addr = addr;
+        tipc_named_reinit(net);
+        tipc_sk_reinit(net);
+        res = tipc_bclink_init(net);
         if (res)
                 return res;
 
-        tipc_nametbl_publish(TIPC_CFG_SRV, tipc_own_addr, tipc_own_addr,
-                             TIPC_ZONE_SCOPE, 0, tipc_own_addr);
+        tipc_nametbl_publish(net, TIPC_CFG_SRV, tn->own_addr, tn->own_addr,
+                             TIPC_ZONE_SCOPE, 0, tn->own_addr);
 
         pr_info("Started in network mode\n");
         pr_info("Own node address %s, network identity %u\n",
-                tipc_addr_string_fill(addr_string, tipc_own_addr), tipc_net_id);
+                tipc_addr_string_fill(addr_string, tn->own_addr),
+                tn->net_id);
         return 0;
 }
 
-void tipc_net_stop(void)
+void tipc_net_stop(struct net *net)
 {
-        if (!tipc_own_addr)
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+
+        if (!tn->own_addr)
                 return;
 
-        tipc_nametbl_withdraw(TIPC_CFG_SRV, tipc_own_addr, 0, tipc_own_addr);
+        tipc_nametbl_withdraw(net, TIPC_CFG_SRV, tn->own_addr, 0,
+                              tn->own_addr);
         rtnl_lock();
-        tipc_bearer_stop();
-        tipc_bclink_stop();
-        tipc_node_stop();
+        tipc_bearer_stop(net);
+        tipc_bclink_stop(net);
+        tipc_node_stop(net);
         rtnl_unlock();
 
         pr_info("Left network mode\n");
 }
+
+static int __tipc_nl_add_net(struct net *net, struct tipc_nl_msg *msg)
+{
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        void *hdr;
+        struct nlattr *attrs;
+
+        hdr = genlmsg_put(msg->skb, msg->portid, msg->seq, &tipc_genl_family,
+                          NLM_F_MULTI, TIPC_NL_NET_GET);
+        if (!hdr)
+                return -EMSGSIZE;
+
+        attrs = nla_nest_start(msg->skb, TIPC_NLA_NET);
+        if (!attrs)
+                goto msg_full;
+
+        if (nla_put_u32(msg->skb, TIPC_NLA_NET_ID, tn->net_id))
+                goto attr_msg_full;
+
+        nla_nest_end(msg->skb, attrs);
+        genlmsg_end(msg->skb, hdr);
+
+        return 0;
+
+attr_msg_full:
+        nla_nest_cancel(msg->skb, attrs);
+msg_full:
+        genlmsg_cancel(msg->skb, hdr);
+
+        return -EMSGSIZE;
+}
+
+int tipc_nl_net_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+        struct net *net = sock_net(skb->sk);
+        int err;
+        int done = cb->args[0];
+        struct tipc_nl_msg msg;
+
+        if (done)
+                return 0;
+
+        msg.skb = skb;
+        msg.portid = NETLINK_CB(cb->skb).portid;
+        msg.seq = cb->nlh->nlmsg_seq;
+
+        err = __tipc_nl_add_net(net, &msg);
+        if (err)
+                goto out;
+
+        done = 1;
+out:
+        cb->args[0] = done;
+
+        return skb->len;
+}
+
+int tipc_nl_net_set(struct sk_buff *skb, struct genl_info *info)
+{
+        struct net *net = sock_net(skb->sk);
+        struct tipc_net *tn = net_generic(net, tipc_net_id);
+        struct nlattr *attrs[TIPC_NLA_NET_MAX + 1];
+        int err;
+
+        if (!info->attrs[TIPC_NLA_NET])
+                return -EINVAL;
+
+        err = nla_parse_nested(attrs, TIPC_NLA_NET_MAX,
+                               info->attrs[TIPC_NLA_NET],
+                               tipc_nl_net_policy);
+        if (err)
+                return err;
+
+        if (attrs[TIPC_NLA_NET_ID]) {
+                u32 val;
+
+                /* Can't change net id once TIPC has joined a network */
+                if (tn->own_addr)
+                        return -EPERM;
+
+                val = nla_get_u32(attrs[TIPC_NLA_NET_ID]);
+                if (val < 1 || val > 9999)
+                        return -EINVAL;
+
+                tn->net_id = val;
+        }
+
+        if (attrs[TIPC_NLA_NET_ADDR]) {
+                u32 addr;
+
+                /* Can't change net addr once TIPC has joined a network */
+                if (tn->own_addr)
+                        return -EPERM;
+
+                addr = nla_get_u32(attrs[TIPC_NLA_NET_ADDR]);
+                if (!tipc_addr_node_valid(addr))
+                        return -EINVAL;
+
+                rtnl_lock();
+                tipc_net_start(net, addr);
+                rtnl_unlock();
+        }
+
+        return 0;
+}