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authorAl Viro <viro@zeniv.linux.org.uk>2006-11-14 21:20:08 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-02 21:23:14 -0800
commita4f89fb7c072b8592b296c2ba216269c0c96db43 (patch)
tree81ed700573ed0bcf23b99e82ae0b538ac16e62e9 /include/asm-x86_64
parent9d3d41955845939cb41b87affb039db0bae03b65 (diff)
[NET]: X86_64 checksum annotations and cleanups.
* sanitize prototypes, annotate * usual ntohs->shift Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/checksum.h54
1 files changed, 28 insertions, 26 deletions
diff --git a/include/asm-x86_64/checksum.h b/include/asm-x86_64/checksum.h
index 989469e8e0b..419fe88a034 100644
--- a/include/asm-x86_64/checksum.h
+++ b/include/asm-x86_64/checksum.h
@@ -19,15 +19,16 @@
* the last step before putting a checksum into a packet.
* Make sure not to mix with 64bit checksums.
*/
-static inline unsigned int csum_fold(unsigned int sum)
+static inline __sum16 csum_fold(__wsum sum)
{
__asm__(
" addl %1,%0\n"
" adcl $0xffff,%0"
: "=r" (sum)
- : "r" (sum << 16), "0" (sum & 0xffff0000)
+ : "r" ((__force u32)sum << 16),
+ "0" ((__force u32)sum & 0xffff0000)
);
- return (~sum) >> 16;
+ return (__force __sum16)(~(__force u32)sum >> 16);
}
/*
@@ -43,7 +44,7 @@ static inline unsigned int csum_fold(unsigned int sum)
* iph: ipv4 header
* ihl: length of header / 4
*/
-static inline unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl)
+static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
{
unsigned int sum;
@@ -70,7 +71,7 @@ static inline unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl)
: "=r" (sum), "=r" (iph), "=r" (ihl)
: "1" (iph), "2" (ihl)
: "memory");
- return(sum);
+ return (__force __sum16)sum;
}
/**
@@ -84,16 +85,17 @@ static inline unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl)
* Returns the pseudo header checksum the input data. Result is
* 32bit unfolded.
*/
-static inline unsigned long
-csum_tcpudp_nofold(unsigned saddr, unsigned daddr, unsigned short len,
- unsigned short proto, unsigned int sum)
+static inline __wsum
+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
+ unsigned short proto, __wsum sum)
{
asm(" addl %1, %0\n"
" adcl %2, %0\n"
" adcl %3, %0\n"
" adcl $0, %0\n"
: "=r" (sum)
- : "g" (daddr), "g" (saddr), "g" ((ntohs(len)<<16)+proto*256), "0" (sum));
+ : "g" (daddr), "g" (saddr),
+ "g" ((len + proto)<<8), "0" (sum));
return sum;
}
@@ -109,9 +111,9 @@ csum_tcpudp_nofold(unsigned saddr, unsigned daddr, unsigned short len,
* Returns the 16bit pseudo header checksum the input data already
* complemented and ready to be filled in.
*/
-static inline unsigned short int
-csum_tcpudp_magic(unsigned long saddr, unsigned long daddr,
- unsigned short len, unsigned short proto, unsigned int sum)
+static inline __sum16
+csum_tcpudp_magic(__be32 saddr, __be32 daddr,
+ unsigned short len, unsigned short proto, __wsum sum)
{
return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
}
@@ -126,25 +128,25 @@ csum_tcpudp_magic(unsigned long saddr, unsigned long daddr,
* Before filling it in it needs to be csum_fold()'ed.
* buff should be aligned to a 64bit boundary if possible.
*/
-extern unsigned int csum_partial(const unsigned char *buff, unsigned len, unsigned int sum);
+extern __wsum csum_partial(const void *buff, int len, __wsum sum);
#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER 1
#define HAVE_CSUM_COPY_USER 1
/* Do not call this directly. Use the wrappers below */
-extern unsigned long csum_partial_copy_generic(const unsigned char *src, const unsigned char *dst,
- unsigned len,
- unsigned sum,
+extern __wsum csum_partial_copy_generic(const void *src, const void *dst,
+ int len,
+ __wsum sum,
int *src_err_ptr, int *dst_err_ptr);
-extern unsigned int csum_partial_copy_from_user(const unsigned char __user *src, unsigned char *dst,
- int len, unsigned int isum, int *errp);
-extern unsigned int csum_partial_copy_to_user(const unsigned char *src, unsigned char __user *dst,
- int len, unsigned int isum, int *errp);
-extern unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst, int len,
- unsigned int sum);
+extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
+ int len, __wsum isum, int *errp);
+extern __wsum csum_partial_copy_to_user(const void *src, void __user *dst,
+ int len, __wsum isum, int *errp);
+extern __wsum csum_partial_copy_nocheck(const void *src, void *dst, int len,
+ __wsum sum);
/* Old names. To be removed. */
#define csum_and_copy_to_user csum_partial_copy_to_user
@@ -158,7 +160,7 @@ extern unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned
* Returns the 16bit folded/inverted checksum of the passed buffer.
* Ready to fill in.
*/
-extern unsigned short ip_compute_csum(unsigned char * buff, int len);
+extern __sum16 ip_compute_csum(const void *buff, int len);
/**
* csum_ipv6_magic - Compute checksum of an IPv6 pseudo header.
@@ -176,9 +178,9 @@ extern unsigned short ip_compute_csum(unsigned char * buff, int len);
struct in6_addr;
#define _HAVE_ARCH_IPV6_CSUM 1
-extern unsigned short
-csum_ipv6_magic(struct in6_addr *saddr, struct in6_addr *daddr,
- __u32 len, unsigned short proto, unsigned int sum);
+extern __sum16
+csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr,
+ __u32 len, unsigned short proto, __wsum sum);
static inline unsigned add32_with_carry(unsigned a, unsigned b)
{