optimize: check for mergeable rules

Rules that are equal need to have at least one mergeable statement.

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

2 files changed, 28 insertions, 0 deletions

diff --git a/tests/shell/testcases/optimizations/dumps/not_mergeable.nft b/tests/shell/testcases/optimizations/dumps/not_mergeable.nft
new file mode 100644
index 00000000..08b2b58f
--- /dev/null
+++ b/tests/shell/testcases/optimizations/dumps/not_mergeable.nft
@@ -0,0 +1,12 @@
+table ip x {
+	chain t1 {
+	}
+
+	chain t2 {
+	}
+
+	chain y {
+		counter packets 0 bytes 0 jump t1
+		counter packets 0 bytes 0 jump t2
+	}
+}
diff --git a/tests/shell/testcases/optimizations/not_mergeable b/tests/shell/testcases/optimizations/not_mergeable
new file mode 100755
index 00000000..25635cdd
--- /dev/null
+++ b/tests/shell/testcases/optimizations/not_mergeable
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -e
+
+RULESET="table ip x {
+	chain t1 {
+	}
+	chain t2 {
+	}
+	chain y {
+		counter jump t1
+		counter jump t2
+	}
+}"
+
+$NFT -o -f - <<< $RULESET