tipc: Add routines for safe checking of node's network address
Introduces routines that test whether a given network address is
equal to a node's own network address or if it lies within the node's
own network cluster, and which work properly regardless of whether
the node is using the default network address <0.0.0> or a non-zero
network address that is assigned later on. In essence, these routines
ensure that address <0.0.0> is treated as an alias for "this node",
regardless of which network address the node is actually using.
Old users of the pre-existing more strict match in_own_cluster()
have been accordingly redirected to what is now called
in_own_cluster_exact() --- which does not extend matching to <0,0,0>.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/tipc/addr.h b/net/tipc/addr.h
index e4f35af..d706a1d 100644
--- a/net/tipc/addr.h
+++ b/net/tipc/addr.h
@@ -50,12 +50,30 @@
return addr & TIPC_CLUSTER_MASK;
}
-static inline int in_own_cluster(u32 addr)
+static inline int in_own_cluster_exact(u32 addr)
{
return !((addr ^ tipc_own_addr) >> 12);
}
/**
+ * in_own_node - test for node inclusion; <0.0.0> always matches
+ */
+
+static inline int in_own_node(u32 addr)
+{
+ return (addr == tipc_own_addr) || !addr;
+}
+
+/**
+ * in_own_cluster - test for cluster inclusion; <0.0.0> always matches
+ */
+
+static inline int in_own_cluster(u32 addr)
+{
+ return in_own_cluster_exact(addr) || !addr;
+}
+
+/**
* addr_domain - convert 2-bit scope value to equivalent message lookup domain
*
* Needed when address of a named message must be looked up a second time
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 5dfd89c..0bfdeba 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -449,7 +449,7 @@
if (tipc_in_scope(disc_domain, tipc_own_addr)) {
disc_domain = tipc_own_addr & TIPC_CLUSTER_MASK;
res = 0; /* accept any node in own cluster */
- } else if (in_own_cluster(disc_domain))
+ } else if (in_own_cluster_exact(disc_domain))
res = 0; /* accept specified node in own cluster */
}
if (res) {
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 5d70042..1e0518d 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -342,7 +342,7 @@
list_add(&publ->zone_list, &info->zone_list);
info->zone_list_size++;
- if (in_own_cluster(node)) {
+ if (in_own_cluster_exact(node)) {
list_add(&publ->cluster_list, &info->cluster_list);
info->cluster_list_size++;
}
@@ -411,7 +411,7 @@
/* Remove publication from cluster scope list, if present */
- if (in_own_cluster(node)) {
+ if (in_own_cluster_exact(node)) {
list_del(&publ->cluster_list);
info->cluster_list_size--;
}
@@ -604,7 +604,7 @@
publ = list_first_entry(&info->node_list, struct publication,
node_list);
list_move_tail(&publ->node_list, &info->node_list);
- } else if (in_own_cluster(*destnode)) {
+ } else if (in_own_cluster_exact(*destnode)) {
if (list_empty(&info->cluster_list))
goto no_match;
publ = list_first_entry(&info->cluster_list, struct publication,
diff --git a/net/tipc/node.c b/net/tipc/node.c
index a34cabc..6a71bea 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -72,7 +72,7 @@
struct tipc_node *node;
struct hlist_node *pos;
- if (unlikely(!in_own_cluster(addr)))
+ if (unlikely(!in_own_cluster_exact(addr)))
return NULL;
hlist_for_each_entry(node, pos, &node_htable[tipc_hashfn(addr)], hash) {