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tipc: tipc: convert node list and node hlist to RCU lists

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Convert tipc_node_list list and node_htable hash list to RCU lists.
On read side, the two lists are protected with RCU read lock, and
on update side, node_list_lock is applied to them.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue 2014-03-27 12:54:37 +08:00 • committed by David S. Miller
parent 46651c59c4
commit 6c7a762e70
4 changed files with 31 additions and 21 deletions
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28
net/tipc/node.c
View file

@ -72,14 +72,14 @@ struct tipc_node *tipc_node_find(u32 addr)
if (unlikely(!in_own_cluster_exact(addr)))
return NULL;
spin_lock_bh(&node_list_lock);
hlist_for_each_entry(node, &node_htable[tipc_hashfn(addr)], hash) {
rcu_read_lock();
hlist_for_each_entry_rcu(node, &node_htable[tipc_hashfn(addr)], hash) {
if (node->addr == addr) {
spin_unlock_bh(&node_list_lock);
rcu_read_unlock();
return node;
}
}
spin_unlock_bh(&node_list_lock);
rcu_read_unlock();
return NULL;
}
@ -102,13 +102,13 @@ struct tipc_node *tipc_node_create(u32 addr)
INIT_LIST_HEAD(&n_ptr->list);
INIT_LIST_HEAD(&n_ptr->nsub);
hlist_add_head(&n_ptr->hash, &node_htable[tipc_hashfn(addr)]);
hlist_add_head_rcu(&n_ptr->hash, &node_htable[tipc_hashfn(addr)]);
list_for_each_entry(temp_node, &tipc_node_list, list) {
list_for_each_entry_rcu(temp_node, &tipc_node_list, list) {
if (n_ptr->addr < temp_node->addr)
break;
}
list_add_tail(&n_ptr->list, &temp_node->list);
list_add_tail_rcu(&n_ptr->list, &temp_node->list);
n_ptr->block_setup = WAIT_PEER_DOWN;
n_ptr->signature = INVALID_NODE_SIG;
@ -120,9 +120,9 @@ struct tipc_node *tipc_node_create(u32 addr)
static void tipc_node_delete(struct tipc_node *n_ptr)
{
list_del(&n_ptr->list);
hlist_del(&n_ptr->hash);
kfree(n_ptr);
list_del_rcu(&n_ptr->list);
hlist_del_rcu(&n_ptr->hash);
kfree_rcu(n_ptr, rcu);
tipc_num_nodes--;
}
@ -359,7 +359,8 @@ struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
}
/* Add TLVs for all nodes in scope */
list_for_each_entry(n_ptr, &tipc_node_list, list) {
rcu_read_lock();
list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) {
if (!tipc_in_scope(domain, n_ptr->addr))
continue;
node_info.addr = htonl(n_ptr->addr);
@ -367,6 +368,7 @@ struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
tipc_cfg_append_tlv(buf, TIPC_TLV_NODE_INFO,
&node_info, sizeof(node_info));
}
rcu_read_unlock();
spin_unlock_bh(&node_list_lock);
return buf;
}
@ -412,7 +414,8 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO, &link_info, sizeof(link_info));
/* Add TLVs for any other links in scope */
list_for_each_entry(n_ptr, &tipc_node_list, list) {
rcu_read_lock();
list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) {
u32 i;
if (!tipc_in_scope(domain, n_ptr->addr))
@ -429,6 +432,7 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
}
tipc_node_unlock(n_ptr);
}
rcu_read_unlock();
spin_unlock_bh(&node_list_lock);
return buf;
}