X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fnet%2Fchecksum.h;h=124246172a88990ba6e04c1c7315a4e09f81ce0a;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=cd3c52a594e4b3a1252a3f3a75782bd81fc6ee39;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/include/net/checksum.h b/include/net/checksum.h
index cd3c52a59..124246172 100644
--- a/include/net/checksum.h
+++ b/include/net/checksum.h
@@ -16,89 +16,21 @@
  *		2 of the License, or (at your option) any later version.
  */
 
-/*
- *	Fixes:
- *
- *	Ralf Baechle			:	generic ipv6 checksum
- *	<ralf@waldorf-gmbh.de>
- */
-
 #ifndef _CHECKSUM_H
 #define _CHECKSUM_H
 
+#include <linux/errno.h>
 #include <asm/types.h>
 #include <asm/byteorder.h>
-#include <net/ip.h>
-#include <linux/in6.h>
 #include <asm/uaccess.h>
 #include <asm/checksum.h>
 
-#ifndef _HAVE_ARCH_IPV6_CSUM
-
-static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
-						     struct in6_addr *daddr,
-						     __u16 len,
-						     unsigned short proto,
-						     unsigned int csum) 
-{
-
-	int carry;
-	__u32 ulen;
-	__u32 uproto;
-
-	csum += saddr->s6_addr32[0];
-	carry = (csum < saddr->s6_addr32[0]);
-	csum += carry;
-
-	csum += saddr->s6_addr32[1];
-	carry = (csum < saddr->s6_addr32[1]);
-	csum += carry;
-
-	csum += saddr->s6_addr32[2];
-	carry = (csum < saddr->s6_addr32[2]);
-	csum += carry;
-
-	csum += saddr->s6_addr32[3];
-	carry = (csum < saddr->s6_addr32[3]);
-	csum += carry;
-
-	csum += daddr->s6_addr32[0];
-	carry = (csum < daddr->s6_addr32[0]);
-	csum += carry;
-
-	csum += daddr->s6_addr32[1];
-	carry = (csum < daddr->s6_addr32[1]);
-	csum += carry;
-
-	csum += daddr->s6_addr32[2];
-	carry = (csum < daddr->s6_addr32[2]);
-	csum += carry;
-
-	csum += daddr->s6_addr32[3];
-	carry = (csum < daddr->s6_addr32[3]);
-	csum += carry;
-
-	ulen = htonl((__u32) len);
-	csum += ulen;
-	carry = (csum < ulen);
-	csum += carry;
-
-	uproto = htonl(proto);
-	csum += uproto;
-	carry = (csum < uproto);
-	csum += carry;
-
-	return csum_fold(csum);
-}
-
-#endif
-
 #ifndef _HAVE_ARCH_COPY_AND_CSUM_FROM_USER
 static inline
-unsigned int csum_and_copy_from_user (const char __user *src, char *dst,
-				      int len, int sum, int *err_ptr)
+__wsum csum_and_copy_from_user (const void __user *src, void *dst,
+				      int len, __wsum sum, int *err_ptr)
 {
-	if (verify_area(VERIFY_READ, src, len) == 0)
+	if (access_ok(VERIFY_READ, src, len))
 		return csum_partial_copy_from_user(src, dst, len, sum, err_ptr);
 
 	if (len)
@@ -109,8 +41,8 @@ unsigned int csum_and_copy_from_user (const char __user *src, char *dst,
 #endif
 
 #ifndef HAVE_CSUM_COPY_USER
-static __inline__ unsigned int csum_and_copy_to_user
-(const char *src, char __user *dst, int len, unsigned int sum, int *err_ptr)
+static __inline__ __wsum csum_and_copy_to_user
+(const void *src, void __user *dst, int len, __wsum sum, int *err_ptr)
 {
 	sum = csum_partial(src, len, sum);
 
@@ -121,35 +53,44 @@ static __inline__ unsigned int csum_and_copy_to_user
 	if (len)
 		*err_ptr = -EFAULT;
 
-	return -1; /* invalid checksum */
+	return (__force __wsum)-1; /* invalid checksum */
 }
 #endif
 
-static inline unsigned int csum_add(unsigned int csum, unsigned int addend)
+static inline __wsum csum_add(__wsum csum, __wsum addend)
 {
-	csum += addend;
-	return csum + (csum < addend);
+	u32 res = (__force u32)csum;
+	res += (__force u32)addend;
+	return (__force __wsum)(res + (res < (__force u32)addend));
 }
 
-static inline unsigned int csum_sub(unsigned int csum, unsigned int addend)
+static inline __wsum csum_sub(__wsum csum, __wsum addend)
 {
 	return csum_add(csum, ~addend);
 }
 
-static inline unsigned int
-csum_block_add(unsigned int csum, unsigned int csum2, int offset)
+static inline __wsum
+csum_block_add(__wsum csum, __wsum csum2, int offset)
 {
+	u32 sum = (__force u32)csum2;
 	if (offset&1)
-		csum2 = ((csum2&0xFF00FF)<<8)+((csum2>>8)&0xFF00FF);
-	return csum_add(csum, csum2);
+		sum = ((sum&0xFF00FF)<<8)+((sum>>8)&0xFF00FF);
+	return csum_add(csum, (__force __wsum)sum);
 }
 
-static inline unsigned int
-csum_block_sub(unsigned int csum, unsigned int csum2, int offset)
+static inline __wsum
+csum_block_sub(__wsum csum, __wsum csum2, int offset)
 {
+	u32 sum = (__force u32)csum2;
 	if (offset&1)
-		csum2 = ((csum2&0xFF00FF)<<8)+((csum2>>8)&0xFF00FF);
-	return csum_sub(csum, csum2);
+		sum = ((sum&0xFF00FF)<<8)+((sum>>8)&0xFF00FF);
+	return csum_sub(csum, (__force __wsum)sum);
+}
+
+static inline __wsum csum_unfold(__sum16 n)
+{
+	return (__force __wsum)n;
 }
 
+#define CSUM_MANGLED_0 ((__force __sum16)0xffff)
 #endif