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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>
This commit is contained in:
Florian Westphal 2016-01-08 10:29:12 +01:00 committed by Pablo Neira Ayuso
parent e6d8ecac9e
commit ce1e7989d9
1 changed files with 23 additions and 0 deletions
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23
net/netfilter/nft_byteorder.c
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@ -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;