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Commit ce1e7989 authored by Florian Westphal's avatar Florian Westphal Committed by Pablo Neira Ayuso
Browse files

netfilter: nft_byteorder: provide 64bit le/be conversion 



Needed to convert the (64bit) conntrack counters to BE ordering.

Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent e6d8ecac

net/netfilter/nft_byteorder.c

+23 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
 * Development of this code funded by Astaro AG (http://www.astaro.com/)

 */



#include <asm/unaligned.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/module.h>
@@ -39,6 +40,27 @@ static void nft_byteorder_eval(const struct nft_expr *expr, 
	d = (void *)dst;



	switch (priv->size) {

	case 8: {

		u64 src64;



		switch (priv->op) {

		case NFT_BYTEORDER_NTOH:

			for (i = 0; i < priv->len / 8; i++) {

				src64 = get_unaligned_be64(&src[i]);

				src64 = be64_to_cpu((__force __be64)src64);

				put_unaligned_be64(src64, &dst[i]);

			}

			break;

		case NFT_BYTEORDER_HTON:

			for (i = 0; i < priv->len / 8; i++) {

				src64 = get_unaligned_be64(&src[i]);

				src64 = (__force u64)cpu_to_be64(src64);

				put_unaligned_be64(src64, &dst[i]);

			}

			break;

		}

		break;

	}

	case 4:

		switch (priv->op) {

		case NFT_BYTEORDER_NTOH:
@@ -101,6 +123,7 @@ static int nft_byteorder_init(const struct nft_ctx *ctx, 
	switch (priv->size) {

	case 2:

	case 4:

	case 8:

		break;

	default:

		return -EINVAL;