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* [PATCH v4 1/2] netfilter: Introduce new 64-bit helper functions
@ 2019-08-13 18:38 Ander Juaristi
  2019-08-13 18:38 ` [PATCH v4 2/2] netfilter: nft_meta: support for time matching Ander Juaristi
  2019-08-13 18:58 ` [PATCH v4 1/2] netfilter: Introduce new 64-bit helper functions Pablo Neira Ayuso
  0 siblings, 2 replies; 8+ messages in thread
From: Ander Juaristi @ 2019-08-13 18:38 UTC (permalink / raw)
  To: netfilter-devel

Introduce new helper functions to load/store 64-bit values
onto/from registers:

 - nft_reg_store64
 - nft_reg_load64

Signed-off-by: Ander Juaristi <a@juaristi.eus>
---
 include/net/netfilter/nf_tables.h | 11 +++++++++++
 net/netfilter/nft_byteorder.c     |  8 ++++----
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 9b624566b82d..aa33ada8728a 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -2,6 +2,7 @@
 #ifndef _NET_NF_TABLES_H
 #define _NET_NF_TABLES_H
 
+#include <asm/unaligned.h>
 #include <linux/list.h>
 #include <linux/netfilter.h>
 #include <linux/netfilter/nfnetlink.h>
@@ -119,6 +120,16 @@ static inline void nft_reg_store8(u32 *dreg, u8 val)
 	*(u8 *)dreg = val;
 }
 
+static inline void nft_reg_store64(u32 *dreg, u64 val)
+{
+	put_unaligned(val, (u64 *)dreg);
+}
+
+static inline u64 nft_reg_load64(u32 *sreg)
+{
+	return get_unaligned((u64 *)sreg);
+}
+
 static inline u16 nft_reg_load16(u32 *sreg)
 {
 	return *(u16 *)sreg;
diff --git a/net/netfilter/nft_byteorder.c b/net/netfilter/nft_byteorder.c
index e06318428ea0..a25a222d94c8 100644
--- a/net/netfilter/nft_byteorder.c
+++ b/net/netfilter/nft_byteorder.c
@@ -43,14 +43,14 @@ void nft_byteorder_eval(const struct nft_expr *expr,
 		switch (priv->op) {
 		case NFT_BYTEORDER_NTOH:
 			for (i = 0; i < priv->len / 8; i++) {
-				src64 = get_unaligned((u64 *)&src[i]);
-				put_unaligned_be64(src64, &dst[i]);
+				src64 = nft_reg_load64(&src[i]);
+				nft_reg_store64(&dst[i], cpu_to_be64(src64));
 			}
 			break;
 		case NFT_BYTEORDER_HTON:
 			for (i = 0; i < priv->len / 8; i++) {
-				src64 = get_unaligned_be64(&src[i]);
-				put_unaligned(src64, (u64 *)&dst[i]);
+				src64 = be64_to_cpu(nft_reg_load64(&src[i]));
+				nft_reg_store64(&dst[i], src64);
 			}
 			break;
 		}
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2019-08-15  9:57 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-13 18:38 [PATCH v4 1/2] netfilter: Introduce new 64-bit helper functions Ander Juaristi
2019-08-13 18:38 ` [PATCH v4 2/2] netfilter: nft_meta: support for time matching Ander Juaristi
2019-08-13 19:10   ` Pablo Neira Ayuso
2019-08-13 19:14   ` Florian Westphal
2019-08-13 19:15     ` Florian Westphal
2019-08-13 18:58 ` [PATCH v4 1/2] netfilter: Introduce new 64-bit helper functions Pablo Neira Ayuso
2019-08-15  9:46   ` Ander Juaristi
2019-08-15  9:56     ` Pablo Neira Ayuso

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