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[NET]: XTENSA checksum annotations and cleanups.
* sanitize prototypes, annotate * kill csum_partial_copy_fromuser * kill csum_partial_copy * kill useless shifts * usual ntohs->shift Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 26 additions and 38 deletions
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@ -26,7 +26,7 @@
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*
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*
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* it's best to have buff aligned on a 32-bit boundary
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* it's best to have buff aligned on a 32-bit boundary
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*/
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*/
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asmlinkage unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
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asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum);
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/*
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/*
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* the same as csum_partial, but copies from src while it
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* the same as csum_partial, but copies from src while it
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@ -36,7 +36,7 @@ asmlinkage unsigned int csum_partial(const unsigned char * buff, int len, unsign
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* better 64-bit) boundary
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* better 64-bit) boundary
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*/
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*/
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asmlinkage unsigned int csum_partial_copy_generic( const char *src, char *dst, int len, int sum,
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asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst, int len, __wsum sum,
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int *src_err_ptr, int *dst_err_ptr);
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int *src_err_ptr, int *dst_err_ptr);
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/*
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/*
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@ -46,34 +46,25 @@ asmlinkage unsigned int csum_partial_copy_generic( const char *src, char *dst, i
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* If you use these functions directly please don't forget the access_ok().
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* If you use these functions directly please don't forget the access_ok().
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*/
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*/
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static inline
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static inline
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unsigned int csum_partial_copy_nocheck ( const char *src, char *dst,
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__wsum csum_partial_copy_nocheck(const void *src, void *dst,
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int len, int sum)
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int len, __wsum sum)
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{
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{
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return csum_partial_copy_generic ( src, dst, len, sum, NULL, NULL);
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return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
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}
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}
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static inline
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static inline
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unsigned int csum_partial_copy_from_user ( const char *src, char *dst,
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__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
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int len, int sum, int *err_ptr)
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int len, __wsum sum, int *err_ptr)
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{
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{
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return csum_partial_copy_generic ( src, dst, len, sum, err_ptr, NULL);
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return csum_partial_copy_generic((__force const void *)src, dst,
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len, sum, err_ptr, NULL);
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}
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}
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/*
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* These are the old (and unsafe) way of doing checksums, a warning message will be
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* printed if they are used and an exeption occurs.
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*
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* these functions should go away after some time.
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*/
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#define csum_partial_copy_fromuser csum_partial_copy
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unsigned int csum_partial_copy( const char *src, char *dst, int len, int sum);
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/*
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/*
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* Fold a partial checksum
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* Fold a partial checksum
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*/
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*/
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static __inline__ unsigned int csum_fold(unsigned int sum)
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static __inline__ __sum16 csum_fold(__wsum sum)
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{
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{
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unsigned int __dummy;
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unsigned int __dummy;
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__asm__("extui %1, %0, 16, 16\n\t"
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__asm__("extui %1, %0, 16, 16\n\t"
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@ -87,14 +78,14 @@ static __inline__ unsigned int csum_fold(unsigned int sum)
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"extui %0, %0, 0, 16\n\t"
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"extui %0, %0, 0, 16\n\t"
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: "=r" (sum), "=&r" (__dummy)
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: "=r" (sum), "=&r" (__dummy)
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: "0" (sum));
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: "0" (sum));
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return sum;
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return (__force __sum16)sum;
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}
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}
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/*
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/*
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* This is a version of ip_compute_csum() optimized for IP headers,
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* This is a version of ip_compute_csum() optimized for IP headers,
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* which always checksum on 4 octet boundaries.
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* which always checksum on 4 octet boundaries.
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*/
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*/
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static __inline__ unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl)
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static __inline__ __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
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{
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{
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unsigned int sum, tmp, endaddr;
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unsigned int sum, tmp, endaddr;
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@ -127,17 +118,16 @@ static __inline__ unsigned short ip_fast_csum(unsigned char * iph, unsigned int
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return csum_fold(sum);
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return csum_fold(sum);
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}
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}
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static __inline__ unsigned long csum_tcpudp_nofold(unsigned long saddr,
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static __inline__ __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
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unsigned long daddr,
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unsigned short len,
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unsigned short len,
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unsigned short proto,
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unsigned short proto,
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unsigned int sum)
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__wsum sum)
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{
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{
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#ifdef __XTENSA_EL__
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#ifdef __XTENSA_EL__
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unsigned long len_proto = (ntohs(len)<<16)+proto*256;
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unsigned long len_proto = (len + proto) << 8;
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#elif defined(__XTENSA_EB__)
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#elif defined(__XTENSA_EB__)
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unsigned long len_proto = (proto<<16)+len;
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unsigned long len_proto = len + proto;
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#else
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#else
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# error processor byte order undefined!
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# error processor byte order undefined!
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#endif
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#endif
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@ -162,11 +152,10 @@ static __inline__ unsigned long csum_tcpudp_nofold(unsigned long saddr,
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* computes the checksum of the TCP/UDP pseudo-header
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* computes the checksum of the TCP/UDP pseudo-header
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* returns a 16-bit checksum, already complemented
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* returns a 16-bit checksum, already complemented
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*/
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*/
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static __inline__ unsigned short int csum_tcpudp_magic(unsigned long saddr,
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static __inline__ __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
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unsigned long daddr,
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unsigned short len,
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unsigned short len,
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unsigned short proto,
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unsigned short proto,
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unsigned int sum)
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__wsum sum)
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{
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{
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return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
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return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
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}
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}
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@ -176,17 +165,16 @@ static __inline__ unsigned short int csum_tcpudp_magic(unsigned long saddr,
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* in icmp.c
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* in icmp.c
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*/
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*/
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static __inline__ unsigned short ip_compute_csum(unsigned char * buff, int len)
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static __inline__ __sum16 ip_compute_csum(const void *buff, int len)
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{
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{
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return csum_fold (csum_partial(buff, len, 0));
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return csum_fold (csum_partial(buff, len, 0));
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}
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}
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#define _HAVE_ARCH_IPV6_CSUM
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#define _HAVE_ARCH_IPV6_CSUM
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static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
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static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
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struct in6_addr *daddr,
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const struct in6_addr *daddr,
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__u32 len,
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__u32 len, unsigned short proto,
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unsigned short proto,
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__wsum sum)
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unsigned int sum)
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{
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{
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unsigned int __dummy;
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unsigned int __dummy;
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__asm__("l32i %1, %2, 0\n\t"
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__asm__("l32i %1, %2, 0\n\t"
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@ -248,8 +236,8 @@ static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
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* Copy and checksum to user
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* Copy and checksum to user
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*/
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*/
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#define HAVE_CSUM_COPY_USER
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#define HAVE_CSUM_COPY_USER
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static __inline__ unsigned int csum_and_copy_to_user (const char *src, char *dst,
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static __inline__ __wsum csum_and_copy_to_user(const void *src, void __user *dst,
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int len, int sum, int *err_ptr)
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int len, __wsum sum, int *err_ptr)
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{
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{
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if (access_ok(VERIFY_WRITE, dst, len))
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if (access_ok(VERIFY_WRITE, dst, len))
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return csum_partial_copy_generic(src, dst, len, sum, NULL, err_ptr);
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return csum_partial_copy_generic(src, dst, len, sum, NULL, err_ptr);
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@ -257,6 +245,6 @@ static __inline__ unsigned int csum_and_copy_to_user (const char *src, char *dst
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if (len)
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if (len)
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*err_ptr = -EFAULT;
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*err_ptr = -EFAULT;
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return -1; /* invalid checksum */
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return (__force __wsum)-1; /* invalid checksum */
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}
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}
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#endif
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#endif
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