[PATCH nft 4/5] cache: populate flowtable on demand from error path

[Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>]

Flowtables are only required for error reporting hints if kernel reports
ENOENT. Populate the cache from this error path only.

Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
 src/cache.c | 9 +++------
 src/cmd.c   | 4 ++++
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/cache.c b/src/cache.c
index 6ad8e2587806..1fc03f2bbe50 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -30,8 +30,7 @@ static unsigned int evaluate_cache_add(struct cmd *cmd, unsigned int flags)
 			break;
 
 		flags |= NFT_CACHE_TABLE |
-			 NFT_CACHE_SET |
-			 NFT_CACHE_FLOWTABLE;
+			 NFT_CACHE_SET;
 		list_for_each_entry(set, &cmd->table->sets, list) {
 			if (set->automerge)
 				 flags |= NFT_CACHE_SETELEM_MAYBE;
@@ -57,8 +56,7 @@ static unsigned int evaluate_cache_add(struct cmd *cmd, unsigned int flags)
 		break;
 	case CMD_OBJ_RULE:
 		flags |= NFT_CACHE_TABLE |
-			 NFT_CACHE_SET |
-			 NFT_CACHE_FLOWTABLE;
+			 NFT_CACHE_SET;
 
 		if (cmd->handle.index.id ||
 		    cmd->handle.position.id)
@@ -429,8 +427,7 @@ int nft_cache_evaluate(struct nft_ctx *nft, struct list_head *cmds,
 		case CMD_DELETE:
 		case CMD_DESTROY:
 			flags |= NFT_CACHE_TABLE |
-				 NFT_CACHE_SET |
-				 NFT_CACHE_FLOWTABLE;
+				 NFT_CACHE_SET;
 
 			flags = evaluate_cache_del(cmd, flags);
 			break;
diff --git a/src/cmd.c b/src/cmd.c
index 507796bdd6a8..e64171e7c4df 100644
--- a/src/cmd.c
+++ b/src/cmd.c
@@ -201,6 +201,10 @@ static int nft_cmd_enoent_flowtable(struct netlink_ctx *ctx,
 	if (!cmd->handle.flowtable.name)
 		return 0;
 
+	if (nft_cache_update(ctx->nft, NFT_CACHE_TABLE | NFT_CACHE_FLOWTABLE,
+			     ctx->msgs, NULL) < 0)
+		return 0;
+
 	ft = flowtable_lookup_fuzzy(cmd->handle.flowtable.name,
 				    &ctx->nft->cache, &table);
 	/* check table first. */
-- 
2.30.2