tipc: Remove internal linked list of node objects

Eliminates a sorted list TIPC uses to keep track of the neighboring
nodes it has links to, since this duplicates information already present
in the internal array of node object pointers.

Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/tipc/node.c b/net/tipc/node.c
index 58e189b..31dcca9 100644 (file)
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -43,9 +43,6 @@
 static void node_lost_contact(struct tipc_node *n_ptr);
 static void node_established_contact(struct tipc_node *n_ptr);
 
-/* sorted list of nodes within cluster */
-static struct tipc_node *tipc_nodes = NULL;
-
 static DEFINE_SPINLOCK(node_create_lock);
 
 u32 tipc_own_tag = 0;
@@ -63,21 +60,17 @@ u32 tipc_own_tag = 0;
 struct tipc_node *tipc_node_create(u32 addr)
 {
        struct tipc_node *n_ptr;
-       struct tipc_node **curr_node;
        u32 n_num;
 
        spin_lock_bh(&node_create_lock);
 
-       for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
-               if (addr < n_ptr->addr)
-                       break;
-               if (addr == n_ptr->addr) {
-                       spin_unlock_bh(&node_create_lock);
-                       return n_ptr;
-               }
+       n_ptr = tipc_node_find(addr);
+       if (n_ptr) {
+               spin_unlock_bh(&node_create_lock);
+               return n_ptr;
        }
 
-       n_ptr = kzalloc(sizeof(*n_ptr),GFP_ATOMIC);
+       n_ptr = kzalloc(sizeof(*n_ptr), GFP_ATOMIC);
        if (!n_ptr) {
                spin_unlock_bh(&node_create_lock);
                warn("Node creation failed, no memory\n");
@@ -93,15 +86,6 @@ struct tipc_node *tipc_node_create(u32 addr)
        if (n_num > tipc_net.highest_node)
                tipc_net.highest_node = n_num;
 
-       /* Insert node into ordered list */
-       for (curr_node = &tipc_nodes; *curr_node;
-            curr_node = &(*curr_node)->next) {
-               if (addr < (*curr_node)->addr) {
-                       n_ptr->next = *curr_node;
-                       break;
-               }
-       }
-       (*curr_node) = n_ptr;
        spin_unlock_bh(&node_create_lock);
        return n_ptr;
 }
@@ -405,6 +389,7 @@ struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
        struct tipc_node *n_ptr;
        struct tipc_node_info node_info;
        u32 payload_size;
+       u32 n_num;
 
        if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
                return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
@@ -415,14 +400,15 @@ struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
                                                   " (network address)");
 
        read_lock_bh(&tipc_net_lock);
-       if (!tipc_nodes) {
+       if (!tipc_net.nodes) {
                read_unlock_bh(&tipc_net_lock);
                return tipc_cfg_reply_none();
        }
 
        /* For now, get space for all other nodes */
 
-       payload_size = TLV_SPACE(sizeof(node_info)) * (tipc_max_nodes - 1);
+       payload_size = TLV_SPACE(sizeof(node_info)) *
+               (tipc_net.highest_node - 1);
        if (payload_size > 32768u) {
                read_unlock_bh(&tipc_net_lock);
                return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
@@ -436,8 +422,9 @@ struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
 
        /* Add TLVs for all nodes in scope */
 
-       for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
-               if (!tipc_in_scope(domain, n_ptr->addr))
+       for (n_num = 1; n_num <= tipc_net.highest_node; n_num++) {
+               n_ptr = tipc_net.nodes[n_num];
+               if (!n_ptr || !tipc_in_scope(domain, n_ptr->addr))
                        continue;
                node_info.addr = htonl(n_ptr->addr);
                node_info.up = htonl(tipc_node_is_up(n_ptr));
@@ -456,6 +443,7 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
        struct tipc_node *n_ptr;
        struct tipc_link_info link_info;
        u32 payload_size;
+       u32 n_num;
 
        if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
                return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
@@ -493,10 +481,11 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
 
        /* Add TLVs for any other links in scope */
 
-       for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
+       for (n_num = 1; n_num <= tipc_net.highest_node; n_num++) {
                u32 i;
 
-               if (!tipc_in_scope(domain, n_ptr->addr))
+               n_ptr = tipc_net.nodes[n_num];
+               if (!n_ptr || !tipc_in_scope(domain, n_ptr->addr))
                        continue;
                tipc_node_lock(n_ptr);
                for (i = 0; i < MAX_BEARERS; i++) {