[iptables PATCH v2 13/18] nft: cache: Introduce struct nft_cache_req

[Phil Sutter <phil@nwl.cc>]

This embedded struct collects cache requirement info gathered from parsed
nft_cmds and is interpreted by __nft_build_cache().

While being at it, remove unused parameters passed to the latter
function, nft_handle pointer is sufficient.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 iptables/nft-cache.c | 32 +++++++++++++++++---------------
 iptables/nft.h       |  6 +++++-
 2 files changed, 22 insertions(+), 16 deletions(-)

diff --git a/iptables/nft-cache.c b/iptables/nft-cache.c
index 2c6a170881eb3..305f2c12307f7 100644
--- a/iptables/nft-cache.c
+++ b/iptables/nft-cache.c
@@ -26,10 +26,12 @@
 
 void nft_cache_level_set(struct nft_handle *h, int level)
 {
-	if (level <= h->cache_level)
+	struct nft_cache_req *req = &h->cache_req;
+
+	if (level <= req->level)
 		return;
 
-	h->cache_level = level;
+	req->level = level;
 }
 
 static int genid_cb(const struct nlmsghdr *nlh, void *data)
@@ -430,26 +432,26 @@ static int fetch_rule_cache(struct nft_handle *h,
 }
 
 static void
-__nft_build_cache(struct nft_handle *h, enum nft_cache_level level,
-		  const struct builtin_table *t, const char *set,
-		  const char *chain)
+__nft_build_cache(struct nft_handle *h)
 {
+	struct nft_cache_req *req = &h->cache_req;
+
 	if (h->cache_init)
 		return;
 
 	h->cache_init = true;
 	mnl_genid_get(h, &h->nft_genid);
 
-	if (h->cache_level >= NFT_CL_TABLES)
+	if (req->level >= NFT_CL_TABLES)
 		fetch_table_cache(h);
-	if (h->cache_level == NFT_CL_FAKE)
+	if (req->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)
-		fetch_set_cache(h, t, set);
-	if (h->cache_level >= NFT_CL_RULES)
-		fetch_rule_cache(h, t);
+	if (req->level >= NFT_CL_CHAINS)
+		fetch_chain_cache(h, NULL, NULL);
+	if (req->level >= NFT_CL_SETS)
+		fetch_set_cache(h, NULL, NULL);
+	if (req->level >= NFT_CL_RULES)
+		fetch_rule_cache(h, NULL);
 }
 
 static void __nft_flush_cache(struct nft_handle *h)
@@ -563,12 +565,12 @@ void nft_rebuild_cache(struct nft_handle *h)
 		h->cache_init = false;
 	}
 
-	__nft_build_cache(h, h->cache_level, NULL, NULL, NULL);
+	__nft_build_cache(h);
 }
 
 void nft_cache_build(struct nft_handle *h)
 {
-	__nft_build_cache(h, h->cache_level, NULL, NULL, NULL);
+	__nft_build_cache(h);
 }
 
 void nft_release_cache(struct nft_handle *h)
diff --git a/iptables/nft.h b/iptables/nft.h
index 89c3620e7b7d7..c6aece7d1dac8 100644
--- a/iptables/nft.h
+++ b/iptables/nft.h
@@ -71,6 +71,10 @@ enum obj_update_type {
 	NFT_COMPAT_TABLE_NEW,
 };
 
+struct nft_cache_req {
+	enum nft_cache_level	level;
+};
+
 struct nft_handle {
 	int			family;
 	struct mnl_socket	*nl;
@@ -89,7 +93,7 @@ struct nft_handle {
 	unsigned int		cache_index;
 	struct nft_cache	__cache[2];
 	struct nft_cache	*cache;
-	enum nft_cache_level	cache_level;
+	struct nft_cache_req	cache_req;
 	bool			restore;
 	bool			noflush;
 	int8_t			config_done;
-- 
2.25.1