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-rw-r--r--net/tipc/node.c29
1 files changed, 24 insertions, 5 deletions
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 34e9a2bb7c19..ee952ad60218 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -600,12 +600,14 @@ u32 tipc_available_nodes(const u32 domain)
struct node *n_ptr;
u32 cnt = 0;
+ read_lock_bh(&tipc_net_lock);
for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) {
if (!in_scope(domain, n_ptr->addr))
continue;
if (tipc_node_is_up(n_ptr))
cnt++;
}
+ read_unlock_bh(&tipc_net_lock);
return cnt;
}
@@ -625,19 +627,26 @@ struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
" (network address)");
- if (!tipc_nodes)
+ read_lock_bh(&tipc_net_lock);
+ if (!tipc_nodes) {
+ read_unlock_bh(&tipc_net_lock);
return tipc_cfg_reply_none();
+ }
/* For now, get space for all other nodes
(will need to modify this when slave nodes are supported */
payload_size = TLV_SPACE(sizeof(node_info)) * (tipc_max_nodes - 1);
- if (payload_size > 32768u)
+ if (payload_size > 32768u) {
+ read_unlock_bh(&tipc_net_lock);
return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
" (too many nodes)");
+ }
buf = tipc_cfg_reply_alloc(payload_size);
- if (!buf)
+ if (!buf) {
+ read_unlock_bh(&tipc_net_lock);
return NULL;
+ }
/* Add TLVs for all nodes in scope */
@@ -650,6 +659,7 @@ struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
&node_info, sizeof(node_info));
}
+ read_unlock_bh(&tipc_net_lock);
return buf;
}
@@ -672,16 +682,22 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
if (tipc_mode != TIPC_NET_MODE)
return tipc_cfg_reply_none();
+ read_lock_bh(&tipc_net_lock);
+
/* Get space for all unicast links + multicast link */
payload_size = TLV_SPACE(sizeof(link_info)) *
(tipc_net.zones[tipc_zone(tipc_own_addr)]->links + 1);
- if (payload_size > 32768u)
+ if (payload_size > 32768u) {
+ read_unlock_bh(&tipc_net_lock);
return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
" (too many links)");
+ }
buf = tipc_cfg_reply_alloc(payload_size);
- if (!buf)
+ if (!buf) {
+ read_unlock_bh(&tipc_net_lock);
return NULL;
+ }
/* Add TLV for broadcast link */
@@ -697,6 +713,7 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
if (!in_scope(domain, n_ptr->addr))
continue;
+ tipc_node_lock(n_ptr);
for (i = 0; i < MAX_BEARERS; i++) {
if (!n_ptr->links[i])
continue;
@@ -706,7 +723,9 @@ 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));
}
+ tipc_node_unlock(n_ptr);
}
+ read_unlock_bh(&tipc_net_lock);
return buf;
}