Release 4.7 arch/cris/include/asm/checksum.h
/* TODO: csum_tcpudp_magic could be speeded up, and csum_fold as well */
#ifndef _CRIS_CHECKSUM_H
#define _CRIS_CHECKSUM_H
#include <arch/checksum.h>
/*
* computes the checksum of a memory block at buff, length len,
* and adds in "sum" (32-bit)
*
* returns a 32-bit number suitable for feeding into itself
* or csum_tcpudp_magic
*
* this function must be called with even lengths, except
* for the last fragment, which may be odd
*
* it's best to have buff aligned on a 32-bit boundary
*/
__wsum csum_partial(const void *buff, int len, __wsum sum);
/*
* the same as csum_partial, but copies from src while it
* checksums
*
* here even more important to align src and dst on a 32-bit (or even
* better 64-bit) boundary
*/
__wsum csum_partial_copy_nocheck(const void *src, void *dst,
int len, __wsum sum);
/*
* Fold a partial checksum into a word
*/
static inline __sum16 csum_fold(__wsum csum)
{
u32 sum = (__force u32)csum;
sum = (sum & 0xffff) + (sum >> 16); /* add in end-around carry */
sum = (sum & 0xffff) + (sum >> 16); /* add in end-around carry */
return (__force __sum16)~sum;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| al viro | al viro | 28 | 49.12% | 1 | 33.33% |
| linus torvalds | linus torvalds | 28 | 49.12% | 1 | 33.33% |
| adrian bunk | adrian bunk | 1 | 1.75% | 1 | 33.33% |
| Total | 57 | 100.00% | 3 | 100.00% |
extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
int len, __wsum sum,
int *errptr);
/*
* This is a version of ip_compute_csum() optimized for IP headers,
* which always checksum on 4 octet boundaries.
*
*/
static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
{
return csum_fold(csum_partial(iph, ihl * 4, 0));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 27 | 87.10% | 1 | 33.33% |
| al viro | al viro | 3 | 9.68% | 1 | 33.33% |
| adrian bunk | adrian bunk | 1 | 3.23% | 1 | 33.33% |
| Total | 31 | 100.00% | 3 | 100.00% |
/*
* computes the checksum of the TCP/UDP pseudo-header
* returns a 16-bit checksum, already complemented
*/
static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
__u32 len, __u8 proto,
__wsum sum)
{
return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 32 | 82.05% | 1 | 25.00% |
| al viro | al viro | 4 | 10.26% | 1 | 25.00% |
| alexander duyck | alexander duyck | 2 | 5.13% | 1 | 25.00% |
| adrian bunk | adrian bunk | 1 | 2.56% | 1 | 25.00% |
| Total | 39 | 100.00% | 4 | 100.00% |
/*
* this routine is used for miscellaneous IP-like checksums, mainly
* in icmp.c
*/
static inline __sum16 ip_compute_csum(const void *buff, int len)
{
return csum_fold (csum_partial(buff, len, 0));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 24 | 85.71% | 1 | 33.33% |
| al viro | al viro | 3 | 10.71% | 1 | 33.33% |
| adrian bunk | adrian bunk | 1 | 3.57% | 1 | 33.33% |
| Total | 28 | 100.00% | 3 | 100.00% |
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| linus torvalds | linus torvalds | 173 | 74.57% | 2 | 28.57% |
| al viro | al viro | 50 | 21.55% | 1 | 14.29% |
| adrian bunk | adrian bunk | 4 | 1.72% | 1 | 14.29% |
| alexander duyck | alexander duyck | 2 | 0.86% | 1 | 14.29% |
| mikael starvik | mikael starvik | 2 | 0.86% | 1 | 14.29% |
| jesper nilsson | jesper nilsson | 1 | 0.43% | 1 | 14.29% |
| Total | 232 | 100.00% | 7 | 100.00% |
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