nft: cache: Improve fake cache integration

With NFT_CL_FAKE being highest cache level while at the same time
__nft_build_cache() treating it equal to NFT_CL_TABLES, no special
handling for fake cache is required anymore.

Signed-off-by: Phil Sutter <phil@nwl.cc>

iptables/nft-cache.c

diff --git a/iptables/nft-cache.c b/iptables/nft-cache.c
index e0c1387..2c6a170 100644
--- a/iptables/nft-cache.c
+++ b/iptables/nft-cache.c
@@ -442,6 +442,8 @@
 
 	if (h->cache_level >= NFT_CL_TABLES)
 		fetch_table_cache(h);
+	if (h->cache_level == NFT_CL_FAKE)
+		return;
 	if (h->cache_level >= NFT_CL_CHAINS)
 		fetch_chain_cache(h, t, chain);
 	if (h->cache_level >= NFT_CL_SETS)
@@ -450,15 +452,6 @@
 		fetch_rule_cache(h, t);
 }
 
-void nft_fake_cache(struct nft_handle *h)
-{
-	fetch_table_cache(h);
-
-	h->cache_level = NFT_CL_FAKE;
-	h->cache_init = true;
-	mnl_genid_get(h, &h->nft_genid);
-}
-
 static void __nft_flush_cache(struct nft_handle *h)
 {
 	if (!h->cache_index) {
@@ -570,10 +563,7 @@
 		h->cache_init = false;
 	}
 
-	if (h->cache_level == NFT_CL_FAKE)
-		nft_fake_cache(h);
-	else
-		__nft_build_cache(h, h->cache_level, NULL, NULL, NULL);
+	__nft_build_cache(h, h->cache_level, NULL, NULL, NULL);
 }
 
 void nft_cache_build(struct nft_handle *h)

iptables/nft-cache.h

diff --git a/iptables/nft-cache.h b/iptables/nft-cache.h
index 8c63d8d..01dd15e 100644
--- a/iptables/nft-cache.h
+++ b/iptables/nft-cache.h
@@ -4,7 +4,6 @@
 struct nft_handle;
 
 void nft_cache_level_set(struct nft_handle *h, int level);
-void nft_fake_cache(struct nft_handle *h);
 void nft_rebuild_cache(struct nft_handle *h);
 void nft_release_cache(struct nft_handle *h);
 void flush_chain_cache(struct nft_handle *h, const char *tablename);

iptables/xtables-restore.c

diff --git a/iptables/xtables-restore.c b/iptables/xtables-restore.c
index 0b0febd..28ef366 100644
--- a/iptables/xtables-restore.c
+++ b/iptables/xtables-restore.c
@@ -261,7 +261,7 @@
 	char buffer[10240] = {};
 
 	if (!h->noflush)
-		nft_fake_cache(h);
+		nft_cache_level_set(h, NFT_CL_FAKE);
 
 	line = 0;
 	while (fgets(buffer, sizeof(buffer), p->in)) {