[PATCH] Explicitly call fib_get_table() in fib_frontend.c

[PATCH] Explicitly call fib_get_table() in fib_frontend.c

[Pavel Emelyanov]

In case the "multiple tables" config option is y, the ip_fib_local_table
is not a variable, but a macro, that calls fib_get_table(RT_TABLE_LOCAL).

Some code uses this "variable" *3* times in one place, thus implicitly
making 3 calls. Fix it.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>

---

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 78b514b..6012390 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -128,13 +128,14 @@ struct net_device * ip_dev_find(__be32 addr)
 	struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } };
 	struct fib_result res;
 	struct net_device *dev = NULL;
+	struct fib_table *local_table;
 
 #ifdef CONFIG_IP_MULTIPLE_TABLES
 	res.r = NULL;
 #endif
 
-	if (!ip_fib_local_table ||
-	    ip_fib_local_table->tb_lookup(ip_fib_local_table, &fl, &res))
+	local_table = fib_get_table(RT_TABLE_LOCAL);
+	if (!local_table || local_table->tb_lookup(local_table, &fl, &res))
 		return NULL;
 	if (res.type != RTN_LOCAL)
 		goto out;
@@ -152,6 +153,7 @@ unsigned inet_addr_type(__be32 addr)
 	struct flowi		fl = { .nl_u = { .ip4_u = { .daddr = addr } } };
 	struct fib_result	res;
 	unsigned ret = RTN_BROADCAST;
+	struct fib_table *local_table;
 
 	if (ZERONET(addr) || BADCLASS(addr))
 		return RTN_BROADCAST;
@@ -162,10 +164,10 @@ unsigned inet_addr_type(__be32 addr)
 	res.r = NULL;
 #endif
 
-	if (ip_fib_local_table) {
+	local_table = fib_get_table(RT_TABLE_LOCAL);
+	if (local_table) {
 		ret = RTN_UNICAST;
-		if (!ip_fib_local_table->tb_lookup(ip_fib_local_table,
-						   &fl, &res)) {
+		if (!local_table->tb_lookup(local_table, &fl, &res)) {
 			ret = res.type;
 			fib_res_put(&res);
 		}

Re: [PATCH] Explicitly call fib_get_table() in fib_frontend.c

[David Miller]

From: Pavel Emelyanov <xemul@openvz.org>
Date: Mon, 22 Oct 2007 19:56:04 +0400

> In case the "multiple tables" config option is y, the ip_fib_local_table
> is not a variable, but a macro, that calls fib_get_table(RT_TABLE_LOCAL).
> 
> Some code uses this "variable" *3* times in one place, thus implicitly
> making 3 calls. Fix it.
> 
> Signed-off-by: Pavel Emelyanov <xemul@openvz.org>

Good catch, applied.