netdev - [PATCH] ipv4/fib_trie: notify deleted routes on if down event

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Date:	Tue, 30 Oct 2012 16:32:56 +0100
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, Nicolas Dichtel <nicolas.dichtel@...nd.com>
Subject: [PATCH] ipv4/fib_trie: notify deleted routes on if down event

This notification is missing in IPv4 (in IPv6, deleted routes are
notified).

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
---
 net/ipv4/fib_trie.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 31d771c..5b1c7d0 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -1718,15 +1718,20 @@ int fib_table_delete(struct fib_table *tb, struct fib_config *cfg)
 	return 0;
 }
 
-static int trie_flush_list(struct list_head *head)
+static int trie_flush_list(struct fib_table *tb, struct leaf *l,
+			   struct leaf_info *li)
 {
 	struct fib_alias *fa, *fa_node;
 	int found = 0;
 
-	list_for_each_entry_safe(fa, fa_node, head, fa_list) {
+	list_for_each_entry_safe(fa, fa_node, &li->falh, fa_list) {
 		struct fib_info *fi = fa->fa_info;
 
 		if (fi && (fi->fib_flags & RTNH_F_DEAD)) {
+			struct nl_info nlinfo = { .nl_net = fi->fib_net, };
+
+			rtmsg_fib(RTM_DELROUTE, htonl(l->key), fa, li->plen,
+				  tb->tb_id, &nlinfo, 0);
 			list_del_rcu(&fa->fa_list);
 			fib_release_info(fa->fa_info);
 			alias_free_mem_rcu(fa);
@@ -1736,7 +1741,7 @@ static int trie_flush_list(struct list_head *head)
 	return found;
 }
 
-static int trie_flush_leaf(struct leaf *l)
+static int trie_flush_leaf(struct fib_table *tb, struct leaf *l)
 {
 	int found = 0;
 	struct hlist_head *lih = &l->list;
@@ -1744,7 +1749,7 @@ static int trie_flush_leaf(struct leaf *l)
 	struct leaf_info *li = NULL;
 
 	hlist_for_each_entry_safe(li, node, tmp, lih, hlist) {
-		found += trie_flush_list(&li->falh);
+		found += trie_flush_list(tb, l, li);
 
 		if (list_empty(&li->falh)) {
 			hlist_del_rcu(&li->hlist);
@@ -1835,7 +1840,7 @@ int fib_table_flush(struct fib_table *tb)
 	int found = 0;
 
 	for (l = trie_firstleaf(t); l; l = trie_nextleaf(l)) {
-		found += trie_flush_leaf(l);
+		found += trie_flush_leaf(tb, l);
 
 		if (ll && hlist_empty(&ll->list))
 			trie_leaf_remove(t, ll);
-- 
1.7.12

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