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[iptables,v2,4/8] nft: Introduce UDATA_TYPE_COMPAT_EXT

Message ID 20241009114819.15379-5-phil@nwl.cc
State Accepted
Headers show
Series nft: Implement forward compat for future binaries | expand

Commit Message

Phil Sutter Oct. 9, 2024, 11:48 a.m. UTC 
This new rule udata attribute will contain extensions which have been
converted to native nftables expressions for rule parsers to fall back
to.

While at it, export parse_udata_cb() as rule parsing code will call it
in future.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 iptables/nft.c | 11 +++--------
 iptables/nft.h | 12 ++++++++++++
 2 files changed, 15 insertions(+), 8 deletions(-)
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Patch

diff --git a/iptables/nft.c b/iptables/nft.c
index e629f995b7709..2cc654e2dd91d 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -1670,14 +1670,7 @@  int add_counters(struct nftnl_rule *r, uint64_t packets, uint64_t bytes)
 	return 0;
 }
 
-enum udata_type {
-	UDATA_TYPE_COMMENT,
-	UDATA_TYPE_EBTABLES_POLICY,
-	__UDATA_TYPE_MAX,
-};
-#define UDATA_TYPE_MAX (__UDATA_TYPE_MAX - 1)
-
-static int parse_udata_cb(const struct nftnl_udata *attr, void *data)
+int parse_udata_cb(const struct nftnl_udata *attr, void *data)
 {
 	unsigned char *value = nftnl_udata_get(attr);
 	uint8_t type = nftnl_udata_type(attr);
@@ -1691,6 +1684,8 @@  static int parse_udata_cb(const struct nftnl_udata *attr, void *data)
 		break;
 	case UDATA_TYPE_EBTABLES_POLICY:
 		break;
+	case UDATA_TYPE_COMPAT_EXT:
+		break;
 	default:
 		return 0;
 	}
diff --git a/iptables/nft.h b/iptables/nft.h
index 49653ecea7330..f1a58b9e52865 100644
--- a/iptables/nft.h
+++ b/iptables/nft.h
@@ -275,4 +275,16 @@  void nft_assert_table_compatible(struct nft_handle *h,
 int ebt_set_user_chain_policy(struct nft_handle *h, const char *table,
 			      const char *chain, const char *policy);
 
+struct nftnl_udata;
+
+enum udata_type {
+	UDATA_TYPE_COMMENT,
+	UDATA_TYPE_EBTABLES_POLICY,
+	UDATA_TYPE_COMPAT_EXT,
+	__UDATA_TYPE_MAX,
+};
+#define UDATA_TYPE_MAX (__UDATA_TYPE_MAX - 1)
+
+int parse_udata_cb(const struct nftnl_udata *attr, void *data);
+
 #endif