ipv6: prepare fib6_age() for exception table
If all dst cache entries are stored in the exception table under the
main route, we have to go through them during fib6_age() when doing
garbage collecting.
Introduce a new function rt6_age_exception() which goes through all dst
entries in the exception table and remove those entries that are expired.
This function is called in fib6_age() so that all dst caches are also
garbage collected.
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 0ba4fbb..3afbe50 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -38,14 +38,6 @@
#include <net/ip6_fib.h>
#include <net/ip6_route.h>
-#define RT6_DEBUG 2
-
-#if RT6_DEBUG >= 3
-#define RT6_TRACE(x...) pr_debug(x)
-#else
-#define RT6_TRACE(x...) do { ; } while (0)
-#endif
-
static struct kmem_cache *fib6_node_kmem __read_mostly;
struct fib6_cleaner {
@@ -1890,12 +1882,6 @@ static void fib6_flush_trees(struct net *net)
* Garbage collection
*/
-struct fib6_gc_args
-{
- int timeout;
- int more;
-};
-
static int fib6_age(struct rt6_info *rt, void *arg)
{
struct fib6_gc_args *gc_args = arg;
@@ -1904,9 +1890,6 @@ static int fib6_age(struct rt6_info *rt, void *arg)
/*
* check addrconf expiration here.
* Routes are expired even if they are in use.
- *
- * Also age clones. Note, that clones are aged out
- * only if they are not in use now.
*/
if (rt->rt6i_flags & RTF_EXPIRES && rt->dst.expires) {
@@ -1915,6 +1898,9 @@ static int fib6_age(struct rt6_info *rt, void *arg)
return -1;
}
gc_args->more++;
+ /* The following part will soon be removed when the exception
+ * table is hooked up to store all cached routes.
+ */
} else if (rt->rt6i_flags & RTF_CACHE) {
if (time_after_eq(now, rt->dst.lastuse + gc_args->timeout))
rt->dst.obsolete = DST_OBSOLETE_KILL;
@@ -1940,6 +1926,12 @@ static int fib6_age(struct rt6_info *rt, void *arg)
gc_args->more++;
}
+ /* Also age clones in the exception table.
+ * Note, that clones are aged out
+ * only if they are not in use now.
+ */
+ rt6_age_exceptions(rt, gc_args, now);
+
return 0;
}