[Devel] [PATCH 2.6.25 3/3] ipv4: last default route is a fib table property

[Denis V. Lunev]

ipv4: last default route is a fib table property

Signed-off-by: Denis V. Lunev <den at openvz.org>
Acked-by: Alexey Kuznetsov <kuznet at ms2.inr.ac.ru>
---
 include/net/ip_fib.h |    1 +
 net/ipv4/fib_hash.c  |   16 ++++++++--------
 net/ipv4/fib_trie.c  |   18 +++++++++---------
 3 files changed, 18 insertions(+), 17 deletions(-)

diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 690fb4d..d70b9b4 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -141,6 +141,7 @@ struct fib_table {
 	struct hlist_node tb_hlist;
 	u32		tb_id;
 	unsigned	tb_stamp;
+	int		tb_default;
 	int		(*tb_lookup)(struct fib_table *tb, const struct flowi *flp, struct fib_result *res);
 	int		(*tb_insert)(struct fib_table *, struct fib_config *);
 	int		(*tb_delete)(struct fib_table *, struct fib_config *);
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index a52b570..481de47 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -272,8 +272,6 @@ out:
 	return err;
 }
 
-static int fn_hash_last_dflt=-1;
-
 static void
 fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
 {
@@ -314,9 +312,9 @@ fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
 				if (next_fi != res->fi)
 					break;
 			} else if (!fib_detect_death(fi, order, &last_resort,
-						     &last_idx, fn_hash_last_dflt)) {
+						&last_idx, tb->tb_default)) {
 				fib_result_assign(res, fi);
-				fn_hash_last_dflt = order;
+				tb->tb_default = order;
 				goto out;
 			}
 			fi = next_fi;
@@ -325,19 +323,20 @@ fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
 	}
 
 	if (order <= 0 || fi == NULL) {
-		fn_hash_last_dflt = -1;
+		tb->tb_default = -1;
 		goto out;
 	}
 
-	if (!fib_detect_death(fi, order, &last_resort, &last_idx, fn_hash_last_dflt)) {
+	if (!fib_detect_death(fi, order, &last_resort, &last_idx,
+				tb->tb_default)) {
 		fib_result_assign(res, fi);
-		fn_hash_last_dflt = order;
+		tb->tb_default = order;
 		goto out;
 	}
 
 	if (last_idx >= 0)
 		fib_result_assign(res, last_resort);
-	fn_hash_last_dflt = last_idx;
+	tb->tb_default = last_idx;
 out:
 	read_unlock(&fib_hash_lock);
 }
@@ -772,6 +771,7 @@ struct fib_table * __init fib_hash_init(u32 id)
 		return NULL;
 
 	tb->tb_id = id;
+	tb->tb_default = -1;
 	tb->tb_lookup = fn_hash_lookup;
 	tb->tb_insert = fn_hash_insert;
 	tb->tb_delete = fn_hash_delete;
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 29a06af..850165a 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1779,8 +1779,6 @@ static int fn_trie_flush(struct fib_table *tb)
 	return found;
 }
 
-static int trie_last_dflt = -1;
-
 static void
 fn_trie_select_default(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
 {
@@ -1827,28 +1825,29 @@ fn_trie_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
 			if (next_fi != res->fi)
 				break;
 		} else if (!fib_detect_death(fi, order, &last_resort,
-					     &last_idx, trie_last_dflt)) {
+					     &last_idx, tb->tb_default)) {
 			fib_result_assign(res, fi);
-			trie_last_dflt = order;
+			tb->tb_default = order;
 			goto out;
 		}
 		fi = next_fi;
 		order++;
 	}
 	if (order <= 0 || fi == NULL) {
-		trie_last_dflt = -1;
+		tb->tb_default = -1;
 		goto out;
 	}
 
-	if (!fib_detect_death(fi, order, &last_resort, &last_idx, trie_last_dflt)) {
+	if (!fib_detect_death(fi, order, &last_resort, &last_idx,
+				tb->tb_default)) {
 		fib_result_assign(res, fi);
-		trie_last_dflt = order;
+		tb->tb_default = order;
 		goto out;
 	}
 	if (last_idx >= 0)
 		fib_result_assign(res, last_resort);
-	trie_last_dflt = last_idx;
- out:;
+	tb->tb_default = last_idx;
+out:
 	rcu_read_unlock();
 }
 
@@ -1975,6 +1974,7 @@ struct fib_table * __init fib_hash_init(u32 id)
 		return NULL;
 
 	tb->tb_id = id;
+	tb->tb_default = -1;
 	tb->tb_lookup = fn_trie_lookup;
 	tb->tb_insert = fn_trie_insert;
 	tb->tb_delete = fn_trie_delete;
-- 
1.5.3.rc5