[PATCH libnftnl] table: add table owner support

[Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>]

Add support for NFTA_TABLE_OWNER.

Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
 include/libnftnl/table.h            |  1 +
 include/linux/netfilter/nf_tables.h |  1 +
 src/table.c                         | 14 +++++++++++++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/include/libnftnl/table.h b/include/libnftnl/table.h
index a37fba2c81a1..d28c375c63e8 100644
--- a/include/libnftnl/table.h
+++ b/include/libnftnl/table.h
@@ -24,6 +24,7 @@ enum nftnl_table_attr {
 	NFTNL_TABLE_USE,
 	NFTNL_TABLE_HANDLE,
 	NFTNL_TABLE_USERDATA,
+	NFTNL_TABLE_OWNER,
 	__NFTNL_TABLE_MAX
 };
 #define NFTNL_TABLE_MAX (__NFTNL_TABLE_MAX - 1)
diff --git a/include/linux/netfilter/nf_tables.h b/include/linux/netfilter/nf_tables.h
index 5cf3faf4b66f..b21be8afa6f1 100644
--- a/include/linux/netfilter/nf_tables.h
+++ b/include/linux/netfilter/nf_tables.h
@@ -181,6 +181,7 @@ enum nft_table_attributes {
 	NFTA_TABLE_HANDLE,
 	NFTA_TABLE_PAD,
 	NFTA_TABLE_USERDATA,
+	NFTA_TABLE_OWNER,
 	__NFTA_TABLE_MAX
 };
 #define NFTA_TABLE_MAX		(__NFTA_TABLE_MAX - 1)
diff --git a/src/table.c b/src/table.c
index 731c8183ad96..32f1bf705f9f 100644
--- a/src/table.c
+++ b/src/table.c
@@ -34,6 +34,7 @@ struct nftnl_table {
 	uint64_t 	handle;
 	uint32_t	use;
 	uint32_t	flags;
+	uint32_t	owner;
 	struct {
 		void		*data;
 		uint32_t	len;
@@ -76,8 +77,8 @@ void nftnl_table_unset(struct nftnl_table *t, uint16_t attr)
 	case NFTNL_TABLE_FLAGS:
 	case NFTNL_TABLE_HANDLE:
 	case NFTNL_TABLE_FAMILY:
-		break;
 	case NFTNL_TABLE_USE:
+	case NFTNL_TABLE_OWNER:
 		break;
 	}
 	t->flags &= ~(1 << attr);
@@ -127,6 +128,9 @@ int nftnl_table_set_data(struct nftnl_table *t, uint16_t attr,
 		memcpy(t->user.data, data, data_len);
 		t->user.len = data_len;
 		break;
+	case NFTNL_TABLE_OWNER:
+		memcpy(&t->owner, data, sizeof(t->owner));
+		break;
 	}
 	t->flags |= (1 << attr);
 	return 0;
@@ -188,6 +192,9 @@ const void *nftnl_table_get_data(const struct nftnl_table *t, uint16_t attr,
 	case NFTNL_TABLE_USERDATA:
 		*data_len = t->user.len;
 		return t->user.data;
+	case NFTNL_TABLE_OWNER:
+		*data_len = sizeof(uint32_t);
+		return &t->owner;
 	}
 	return NULL;
 }
@@ -258,6 +265,7 @@ static int nftnl_table_parse_attr_cb(const struct nlattr *attr, void *data)
 		break;
 	case NFTA_TABLE_FLAGS:
 	case NFTA_TABLE_USE:
+	case NFTA_TABLE_OWNER:
 		if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
 			abi_breakage();
 		break;
@@ -308,6 +316,10 @@ int nftnl_table_nlmsg_parse(const struct nlmsghdr *nlh, struct nftnl_table *t)
 		if (ret < 0)
 			return ret;
 	}
+	if (tb[NFTA_TABLE_OWNER]) {
+		t->owner = ntohl(mnl_attr_get_u32(tb[NFTA_TABLE_OWNER]));
+		t->flags |= (1 << NFTNL_TABLE_OWNER);
+	}
 
 	t->family = nfg->nfgen_family;
 	t->flags |= (1 << NFTNL_TABLE_FAMILY);
-- 
2.20.1