cache: add status field to store the object status

This patch adds the status field to the cache object. This avoids
the (ab)use of the alarm to check if an entry is active or dead.
This is the first step to possibly move the alarm to the cache_extra
memory space of the ftfw (which is the only use by now).

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/cache.h b/include/cache.h
index dcd6bcd..fd8e05f 100644
--- a/include/cache.h
+++ b/include/cache.h
@@ -23,11 +23,19 @@ enum {
 };
 #define CACHE_MAX_FEATURE __CACHE_MAX_FEATURE
 
+enum {
+	C_OBJ_NONE = 0,		/* not in the cache */
+	C_OBJ_NEW,		/* just added to the cache */
+	C_OBJ_ALIVE,		/* in the cache, alive */
+	C_OBJ_DEAD		/* still in the cache, but dead */
+};
+
 struct cache;
 struct cache_object {
 	struct	hashtable_node hashnode;
 	struct	nf_conntrack *ct;
 	struct	cache *cache;
+	int	status;
 	struct	alarm_block alarm;
 	char	data[0];
 };