tests: shell: Test ifname-based hooks

Assert that:
- Non-matching interface specs are accepted
- Existing interfaces are hooked into upon flowtable/chain creation
- A new device matching the spec is hooked into immediately
- No stale hooks remain in 'nft list hooks' output
- Wildcard hooks basically work

Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: Pablo Neira Ayuso <pablo@netfilter.org>

tests/shell/features/list_hooks_flowtable_info.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# check for flowtable info in 'list hooks' output
+
+unshare -n bash -c " \
+$NFT \"table inet t { flowtable ft { hook ingress priority 0; devices = { lo }; }; }\"; \
+$NFT list hooks netdev device lo | grep -q flowtable\ inet\ t\ ft"

tests/shell/testcases/chains/dumps/netdev_chain_name_based_hook_0.json-nft

@@ -0,0 +1,34 @@
+{
+  "nftables": [
+    {
+      "metainfo": {
+        "version": "VERSION",
+        "release_name": "RELEASE_NAME",
+        "json_schema_version": 1
+      }
+    },
+    {
+      "table": {
+        "family": "netdev",
+        "name": "t",
+        "handle": 0
+      }
+    },
+    {
+      "chain": {
+        "family": "netdev",
+        "table": "t",
+        "name": "c",
+        "handle": 0,
+        "dev": [
+          "foo*",
+          "lo"
+        ],
+        "type": "filter",
+        "hook": "ingress",
+        "prio": 0,
+        "policy": "accept"
+      }
+    }
+  ]
+}

tests/shell/testcases/chains/dumps/netdev_chain_name_based_hook_0.nft

@@ -0,0 +1,5 @@
+table netdev t {
+	chain c {
+		type filter hook ingress devices = { "foo*", "lo" } priority filter; policy accept;
+	}
+}

tests/shell/testcases/chains/netdev_chain_name_based_hook_0

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+# NFT_TEST_REQUIRES(NFT_TEST_HAVE_ifname_based_hooks)
+
+cspec=' chain netdev t c '
+$NFT add table netdev t
+$NFT add $cspec '{ type filter hook ingress priority 0; devices = { lo, foo* }; }'
+$NFT list hooks netdev device lo | grep -q "$cspec" || {
+	echo "Existing device lo not hooked into chain as expected"
+	exit 1
+}
+
+[[ $($NFT list hooks | grep -c "$cspec") -eq 1 ]] || {
+	echo "Chain hooks into more than just lo"
+	exit 2
+}
+
+ip link add foo1 type dummy
+$NFT list hooks netdev device foo1 | grep -q "$cspec" || {
+	echo "Chain did not hook into new device foo1"
+	exit 3
+}
+[[ $($NFT list hooks | grep -c "$cspec") -eq 2 ]] || {
+	echo "Chain expected to hook into exactly two devices"
+	exit 4
+}
+
+ip link del foo1
+$NFT list hooks netdev device foo1 | grep -q "$cspec" && {
+	echo "Chain still hooks into removed device foo1"
+	exit 5
+}
+[[ $($NFT list hooks | grep -c "$cspec") -eq 1 ]] || {
+	echo "Chain expected to hook into just lo"
+	exit 6
+}
+
+for ((i = 0; i < 100; i++)); do
+	ip link add foo$i type dummy
+done
+[[ $($NFT list hooks | grep -c "$cspec") -eq 101 ]] || {
+	echo "Chain did not hook into all 100 new devices"
+	exit 7
+}

tests/shell/testcases/flowtable/0016name_based_hook_0

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+# NFT_TEST_REQUIRES(NFT_TEST_HAVE_ifname_based_hooks)
+# NFT_TEST_REQUIRES(NFT_TEST_HAVE_list_hooks_flowtable_info)
+
+ftspec=' flowtable ip t ft '
+$NFT add table t
+$NFT add $ftspec '{ hook ingress priority 0; devices = { lo, foo* }; }'
+$NFT list hooks netdev device lo | grep -q "$ftspec" || {
+	echo "Existing device lo not hooked into flowtable as expected"
+	exit 1
+}
+
+[[ $($NFT list hooks | grep -c "$ftspec") -eq 1 ]] || {
+	echo "Flowtable hooks into more than just lo"
+	exit 2
+}
+
+ip link add foo1 type dummy
+$NFT list hooks netdev device foo1 | grep -q "$ftspec" || {
+	echo "Flowtable did not hook into new device foo1"
+	exit 3
+}
+[[ $($NFT list hooks | grep -c "$ftspec") -eq 2 ]] || {
+	echo "Flowtable expected to hook into exactly two devices"
+	exit 4
+}
+
+ip link del foo1
+$NFT list hooks netdev device foo1 | grep -q "$ftspec" && {
+	echo "Flowtable still hooks into removed device foo1"
+	exit 5
+}
+[[ $($NFT list hooks | grep -c "$ftspec") -eq 1 ]] || {
+	echo "Flowtable expected to hook into just lo"
+	exit 6
+}
+
+for ((i = 0; i < 100; i++)); do
+	ip link add foo$i type dummy
+done
+[[ $($NFT list hooks | grep -c "$ftspec") -eq 101 ]] || {
+	echo "Flowtable did not hook into all 100 new devices"
+	exit 7
+}

tests/shell/testcases/flowtable/dumps/0016name_based_hook_0.json-nft

@@ -0,0 +1,32 @@
+{
+  "nftables": [
+    {
+      "metainfo": {
+        "version": "VERSION",
+        "release_name": "RELEASE_NAME",
+        "json_schema_version": 1
+      }
+    },
+    {
+      "table": {
+        "family": "ip",
+        "name": "t",
+        "handle": 0
+      }
+    },
+    {
+      "flowtable": {
+        "family": "ip",
+        "name": "ft",
+        "table": "t",
+        "handle": 0,
+        "hook": "ingress",
+        "prio": 0,
+        "dev": [
+          "foo*",
+          "lo"
+        ]
+      }
+    }
+  ]
+}

tests/shell/testcases/flowtable/dumps/0016name_based_hook_0.nft

@@ -0,0 +1,6 @@
+table ip t {
+	flowtable ft {
+		hook ingress priority filter
+		devices = { "foo*", "lo" }
+	}
+}