[PATCH nft] src: expand create commands

[Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>]

create commands also need to be expanded, otherwise elements are never
evaluated:

 # cat ruleset.nft
 define ip-block-4 = { 1.1.1.1 }
 create set netdev filter ip-block-4-test {
        type ipv4_addr
	flags interval
	auto-merge
	elements = $ip-block-4
 }
 # nft -f ruleset.nft
 BUG: unhandled expression type 0
 nft: src/intervals.c:211: interval_expr_key: Assertion `0' failed.
 Aborted

Same applies to chains in the form of:

 create chain x y {
	counter
 }

which is also accepted by the parser.

Fixes: 56c90a2dd2eb ("evaluate: expand sets and maps before evaluation")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
I will post a v2 includes tests.

 src/libnftables.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libnftables.c b/src/libnftables.c
index ec902009e002..0dee1bacb0db 100644
--- a/src/libnftables.c
+++ b/src/libnftables.c
@@ -532,7 +532,8 @@ static int nft_evaluate(struct nft_ctx *nft, struct list_head *msgs,
 		collapsed = true;
 
 	list_for_each_entry(cmd, cmds, list) {
-		if (cmd->op != CMD_ADD)
+		if (cmd->op != CMD_ADD &&
+		    cmd->op != CMD_CREATE)
 			continue;
 
 		nft_cmd_expand(cmd);
-- 
2.30.2