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netfilter: nft_byteorder: provide 64bit le/be conversion
Needed to convert the (64bit) conntrack counters to BE ordering. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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@ -8,6 +8,7 @@
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* Development of this code funded by Astaro AG (http://www.astaro.com/)
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*/
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#include <asm/unaligned.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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@ -39,6 +40,27 @@ static void nft_byteorder_eval(const struct nft_expr *expr,
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d = (void *)dst;
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switch (priv->size) {
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case 8: {
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u64 src64;
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switch (priv->op) {
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case NFT_BYTEORDER_NTOH:
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for (i = 0; i < priv->len / 8; i++) {
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src64 = get_unaligned_be64(&src[i]);
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src64 = be64_to_cpu((__force __be64)src64);
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put_unaligned_be64(src64, &dst[i]);
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}
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break;
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case NFT_BYTEORDER_HTON:
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for (i = 0; i < priv->len / 8; i++) {
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src64 = get_unaligned_be64(&src[i]);
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src64 = (__force u64)cpu_to_be64(src64);
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put_unaligned_be64(src64, &dst[i]);
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}
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break;
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}
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break;
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}
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case 4:
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switch (priv->op) {
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case NFT_BYTEORDER_NTOH:
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@ -101,6 +123,7 @@ static int nft_byteorder_init(const struct nft_ctx *ctx,
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switch (priv->size) {
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case 2:
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case 4:
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case 8:
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break;
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default:
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return -EINVAL;
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