diff options
Diffstat (limited to 'arch/um/include/sysdep-i386/checksum.h')
| -rw-r--r-- | arch/um/include/sysdep-i386/checksum.h | 74 |
1 files changed, 30 insertions, 44 deletions
diff --git a/arch/um/include/sysdep-i386/checksum.h b/arch/um/include/sysdep-i386/checksum.h index 052bb061a97..0cb4645cbeb 100644 --- a/arch/um/include/sysdep-i386/checksum.h +++ b/arch/um/include/sysdep-i386/checksum.h @@ -20,8 +20,7 @@ * * it's best to have buff aligned on a 32-bit boundary */ -unsigned int csum_partial(const unsigned char * buff, int len, - unsigned int sum); +__wsum csum_partial(const void *buff, int len, __wsum sum); /* * Note: when you get a NULL pointer exception here this means someone @@ -32,8 +31,8 @@ unsigned int csum_partial(const unsigned char * buff, int len, */ static __inline__ -unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst, - int len, int sum) +__wsum csum_partial_copy_nocheck(const void *src, void *dst, + int len, __wsum sum) { memcpy(dst, src, len); return csum_partial(dst, len, sum); @@ -48,36 +47,25 @@ unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char * */ static __inline__ -unsigned int csum_partial_copy_from_user(const unsigned char __user *src, - unsigned char *dst, - int len, int sum, int *err_ptr) +__wsum csum_partial_copy_from_user(const void __user *src, void *dst, + int len, __wsum sum, int *err_ptr) { - if(copy_from_user(dst, src, len)){ + if (copy_from_user(dst, src, len)) { *err_ptr = -EFAULT; - return(-1); + return (__force __wsum)-1; } return csum_partial(dst, len, sum); } /* - * These are the old (and unsafe) way of doing checksums, a warning message - * will be printed if they are used and an exception occurs. - * - * these functions should go away after some time. - */ - -#define csum_partial_copy_fromuser csum_partial_copy_from_user - -/* * This is a version of ip_compute_csum() optimized for IP headers, * which always checksum on 4 octet boundaries. * * By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by * Arnt Gulbrandsen. */ -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; @@ -105,29 +93,29 @@ static inline unsigned short ip_fast_csum(unsigned char * iph, : "=r" (sum), "=r" (iph), "=r" (ihl) : "1" (iph), "2" (ihl) : "memory"); - return sum; + return (__force __sum16)sum; } /* * Fold a partial checksum */ -static inline unsigned int csum_fold(unsigned int sum) +static inline __sum16 csum_fold(__wsum sum) { __asm__( "addl %1, %0 ;\n" "adcl $0xffff, %0 ;\n" : "=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); } -static inline unsigned long csum_tcpudp_nofold(unsigned long saddr, - unsigned long daddr, +static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, unsigned short proto, - unsigned int sum) + __wsum sum) { __asm__( "addl %1, %0 ;\n" @@ -135,7 +123,7 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr, "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; } @@ -143,11 +131,10 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr, * computes the checksum of the TCP/UDP pseudo-header * returns a 16-bit checksum, already complemented */ -static inline unsigned short int csum_tcpudp_magic(unsigned long saddr, - unsigned long daddr, +static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len, unsigned short proto, - unsigned int sum) + __wsum sum) { return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); } @@ -157,17 +144,16 @@ static inline unsigned short int csum_tcpudp_magic(unsigned long saddr, * in icmp.c */ -static inline unsigned short ip_compute_csum(unsigned char * buff, int len) +static inline __sum16 ip_compute_csum(const void *buff, int len) { return csum_fold (csum_partial(buff, len, 0)); } #define _HAVE_ARCH_IPV6_CSUM -static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr, - struct in6_addr *daddr, - __u32 len, - unsigned short proto, - unsigned int sum) +static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr, + const struct in6_addr *daddr, + __u32 len, unsigned short proto, + __wsum sum) { __asm__( "addl 0(%1), %0 ;\n" @@ -192,14 +178,14 @@ static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr, * Copy and checksum to user */ #define HAVE_CSUM_COPY_USER -static __inline__ unsigned int csum_and_copy_to_user(const unsigned char *src, - unsigned char __user *dst, - int len, 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) { - if (access_ok(VERIFY_WRITE, dst, len)){ - if(copy_to_user(dst, src, len)){ + if (access_ok(VERIFY_WRITE, dst, len)) { + if (copy_to_user(dst, src, len)) { *err_ptr = -EFAULT; - return(-1); + return (__force __wsum)-1; } return csum_partial(src, len, sum); @@ -208,7 +194,7 @@ static __inline__ unsigned int csum_and_copy_to_user(const unsigned char *src, if (len) *err_ptr = -EFAULT; - return -1; /* invalid checksum */ + return (__force __wsum)-1; /* invalid checksum */ } #endif |