netlink: pad constant concat sub-expressions

Pad all but the last sub-expressions of a concat expressions.

Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/netlink.h b/include/netlink.h
index 9b42fdbd..185c4357 100644
--- a/include/netlink.h
+++ b/include/netlink.h
@@ -58,6 +58,16 @@ static inline unsigned int netlink_register_space(unsigned int size)
 	return div_round_up(size, NFT_REG32_SIZE * BITS_PER_BYTE);
 }
 
+static inline unsigned int netlink_padded_len(unsigned int size)
+{
+	return netlink_register_space(size) * NFT_REG32_SIZE * BITS_PER_BYTE;
+}
+
+static inline unsigned int netlink_padding_len(unsigned int size)
+{
+	return netlink_padded_len(size) - size;
+}
+
 extern void netlink_gen_data(const struct expr *expr,
 			     struct nft_data_linearize *data);
 extern void netlink_gen_raw_data(const mpz_t value, enum byteorder byteorder,