Merge branch 'linus' into perf/urgent

Merge reason: we need to fix a non-trivial merge conflict.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 23 insertions, 61 deletions

diff --git a/net/tipc/node.c b/net/tipc/node.c
index 6b226faad89f..a34cabc2c43a 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -39,6 +39,8 @@
 #include "node.h"
 #include "name_distr.h"
 
+#define NODE_HTABLE_SIZE 512
+
 static void node_lost_contact(struct tipc_node *n_ptr);
 static void node_established_contact(struct tipc_node *n_ptr);
 
@@ -49,9 +51,19 @@ LIST_HEAD(tipc_node_list);
 static u32 tipc_num_nodes;
 
 static atomic_t tipc_num_links = ATOMIC_INIT(0);
-u32 tipc_own_tag;
 
-/**
+/*
+ * A trivial power-of-two bitmask technique is used for speed, since this
+ * operation is done for every incoming TIPC packet. The number of hash table
+ * entries has been chosen so that no hash chain exceeds 8 nodes and will
+ * usually be much smaller (typically only a single node).
+ */
+static inline unsigned int tipc_hashfn(u32 addr)
+{
+        return addr & (NODE_HTABLE_SIZE - 1);
+}
+
+/*
  * tipc_node_find - locate specified node object, if it exists
  */
 
@@ -113,6 +125,7 @@ struct tipc_node *tipc_node_create(u32 addr)
         }
         list_add_tail(&n_ptr->list, &temp_node->list);
         n_ptr->block_setup = WAIT_PEER_DOWN;
+        n_ptr->signature = INVALID_NODE_SIG;
 
         tipc_num_nodes++;
 
@@ -253,63 +266,14 @@ void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
         n_ptr->link_cnt--;
 }
 
-/*
- * Routing table management - five cases to handle:
- *
- * 1: A link towards a zone/cluster external node comes up.
- *    => Send a multicast message updating routing tables of all
- *    system nodes within own cluster that the new destination
- *    can be reached via this node.
- *    (node.establishedContact()=>cluster.multicastNewRoute())
- *
- * 2: A link towards a slave node comes up.
- *    => Send a multicast message updating routing tables of all
- *    system nodes within own cluster that the new destination
- *    can be reached via this node.
- *    (node.establishedContact()=>cluster.multicastNewRoute())
- *    => Send a  message to the slave node about existence
- *    of all system nodes within cluster:
- *    (node.establishedContact()=>cluster.sendLocalRoutes())
- *
- * 3: A new cluster local system node becomes available.
- *    => Send message(s) to this particular node containing
- *    information about all cluster external and slave
- *     nodes which can be reached via this node.
- *    (node.establishedContact()==>network.sendExternalRoutes())
- *    (node.establishedContact()==>network.sendSlaveRoutes())
- *    => Send messages to all directly connected slave nodes
- *    containing information about the existence of the new node
- *    (node.establishedContact()=>cluster.multicastNewRoute())
- *
- * 4: The link towards a zone/cluster external node or slave
- *    node goes down.
- *    => Send a multcast message updating routing tables of all
- *    nodes within cluster that the new destination can not any
- *    longer be reached via this node.
- *    (node.lostAllLinks()=>cluster.bcastLostRoute())
- *
- * 5: A cluster local system node becomes unavailable.
- *    => Remove all references to this node from the local
- *    routing tables. Note: This is a completely node
- *    local operation.
- *    (node.lostAllLinks()=>network.removeAsRouter())
- *    => Send messages to all directly connected slave nodes
- *    containing information about loss of the node
- *    (node.establishedContact()=>cluster.multicastLostRoute())
- *
- */
-
 static void node_established_contact(struct tipc_node *n_ptr)
 {
         tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr);
 
-        /* Syncronize broadcast acks */
-        n_ptr->bclink.acked = tipc_bclink_get_last_sent();
-
-        if (n_ptr->bclink.supported) {
+        if (n_ptr->bclink.supportable) {
+                n_ptr->bclink.acked = tipc_bclink_get_last_sent();
                 tipc_bclink_add_node(n_ptr->addr);
-                if (n_ptr->addr < tipc_own_addr)
-                        tipc_own_tag++;
+                n_ptr->bclink.supported = 1;
         }
 }
 
@@ -338,22 +302,20 @@ static void node_lost_contact(struct tipc_node *n_ptr)
         /* Flush broadcast link info associated with lost node */
 
         if (n_ptr->bclink.supported) {
-                n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0;
                 while (n_ptr->bclink.deferred_head) {
                         struct sk_buff *buf = n_ptr->bclink.deferred_head;
                         n_ptr->bclink.deferred_head = buf->next;
-                        buf_discard(buf);
+                        kfree_skb(buf);
                 }
+                n_ptr->bclink.deferred_size = 0;
 
                 if (n_ptr->bclink.defragm) {
-                        buf_discard(n_ptr->bclink.defragm);
+                        kfree_skb(n_ptr->bclink.defragm);
                         n_ptr->bclink.defragm = NULL;
                 }
 
                 tipc_bclink_remove_node(n_ptr->addr);
                 tipc_bclink_acknowledge(n_ptr, INVALID_LINK_SEQ);
-                if (n_ptr->addr < tipc_own_addr)
-                        tipc_own_tag--;
 
                 n_ptr->bclink.supported = 0;
         }
@@ -444,12 +406,12 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
                 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
                                                    " (network address)");
 
-        if (tipc_mode != TIPC_NET_MODE)
+        if (!tipc_own_addr)
                 return tipc_cfg_reply_none();
 
         read_lock_bh(&tipc_net_lock);
 
-        /* Get space for all unicast links + multicast link */
+        /* Get space for all unicast links + broadcast link */
 
         payload_size = TLV_SPACE(sizeof(link_info)) *
                 (atomic_read(&tipc_num_links) + 1);