Merge branch 'tipc-namespaces'

Ying Xue says:

====================
tipc: make tipc support namespace

This patchset aims to add net namespace support for TIPC stack.

Currently TIPC module declares the following global resources:
- TIPC network idenfication number
- TIPC node table
- TIPC bearer list table
- TIPC broadcast link
- TIPC socket reference table
- TIPC name service table
- TIPC node address
- TIPC service subscriber server
- TIPC random value
- TIPC netlink

In order that TIPC is aware of namespace, above each resource must be
allocated, initialized and destroyed inside per namespace. Therefore,
the major works of this patchset are to isolate these global resources
and make them private for each namespace. However, before these changes
come true, some necessary preparation works must be first done: convert
socket reference table with generic rhashtable, cleanup core.c and
core.h files, remove unnecessary wrapper functions for kernel timer
interfaces and so on.

It should be noted that commit ##1 ("tipc: fix bug in broadcast
retransmit code") was already submitted to 'net' tree, so please see
below link:

http://patchwork.ozlabs.org/patch/426717/

Since it is prerequisite for the rest of the series to apply, I
prepend them to the series.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 16 deletions

diff --git a/net/tipc/node.h b/net/tipc/node.h
index cbe0e950f1cc..43ef88ef3035 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -42,10 +42,10 @@
 #include "bearer.h"
 #include "msg.h"
 
-/*
- * Out-of-range value for node signature
- */
-#define INVALID_NODE_SIG 0x10000
+/* Out-of-range value for node signature */
+#define INVALID_NODE_SIG	0x10000
+
+#define NODE_HTABLE_SIZE	512
 
 /* Flags used to take different actions according to flag type
  * TIPC_WAIT_PEER_LINKS_DOWN: wait to see that peer's links are down
@@ -90,6 +90,7 @@ struct tipc_node_bclink {
  * struct tipc_node - TIPC node structure
  * @addr: network address of node
  * @lock: spinlock governing access to structure
+ * @net: the applicable net namespace
  * @hash: links to adjacent nodes in unsorted hash chain
  * @active_links: pointers to active links to node
  * @links: pointers to all links to node
@@ -106,6 +107,7 @@ struct tipc_node_bclink {
 struct tipc_node {
 	u32 addr;
 	spinlock_t lock;
+	struct net *net;
 	struct hlist_node hash;
 	struct tipc_link *active_links[2];
 	u32 act_mtus[2];
@@ -123,23 +125,24 @@ struct tipc_node {
 	struct rcu_head rcu;
 };
 
-extern struct list_head tipc_node_list;
-
-struct tipc_node *tipc_node_find(u32 addr);
-struct tipc_node *tipc_node_create(u32 addr);
-void tipc_node_stop(void);
+struct tipc_node *tipc_node_find(struct net *net, u32 addr);
+struct tipc_node *tipc_node_create(struct net *net, u32 addr);
+void tipc_node_stop(struct net *net);
 void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
 void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
 void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
 void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr);
 int tipc_node_active_links(struct tipc_node *n_ptr);
 int tipc_node_is_up(struct tipc_node *n_ptr);
-struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space);
-struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space);
-int tipc_node_get_linkname(u32 bearer_id, u32 node, char *linkname, size_t len);
+struct sk_buff *tipc_node_get_links(struct net *net, const void *req_tlv_area,
+				    int req_tlv_space);
+struct sk_buff *tipc_node_get_nodes(struct net *net, const void *req_tlv_area,
+				    int req_tlv_space);
+int tipc_node_get_linkname(struct net *net, u32 bearer_id, u32 node,
+			   char *linkname, size_t len);
 void tipc_node_unlock(struct tipc_node *node);
-int tipc_node_add_conn(u32 dnode, u32 port, u32 peer_port);
-void tipc_node_remove_conn(u32 dnode, u32 port);
+int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port);
+void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port);
 
 int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb);
 
@@ -154,12 +157,12 @@ static inline bool tipc_node_blocked(struct tipc_node *node)
 		TIPC_NOTIFY_NODE_DOWN | TIPC_WAIT_OWN_LINKS_DOWN));
 }
 
-static inline uint tipc_node_get_mtu(u32 addr, u32 selector)
+static inline uint tipc_node_get_mtu(struct net *net, u32 addr, u32 selector)
 {
 	struct tipc_node *node;
 	u32 mtu;
 
-	node = tipc_node_find(addr);
+	node = tipc_node_find(net, addr);
 
 	if (likely(node))
 		mtu = node->act_mtus[selector & 1];