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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/ia64/include/asm/checksum.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/ia64/include/asm/checksum.h')
-rw-r--r-- | kernel/arch/ia64/include/asm/checksum.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/kernel/arch/ia64/include/asm/checksum.h b/kernel/arch/ia64/include/asm/checksum.h new file mode 100644 index 000000000..97af15505 --- /dev/null +++ b/kernel/arch/ia64/include/asm/checksum.h @@ -0,0 +1,79 @@ +#ifndef _ASM_IA64_CHECKSUM_H +#define _ASM_IA64_CHECKSUM_H + +/* + * Modified 1998, 1999 + * David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co + */ + +/* + * This is a version of ip_compute_csum() optimized for IP headers, + * which always checksum on 4 octet boundaries. + */ +extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl); + +/* + * Computes the checksum of the TCP/UDP pseudo-header returns a 16-bit + * checksum, already complemented + */ +extern __sum16 csum_tcpudp_magic (__be32 saddr, __be32 daddr, + unsigned short len, + unsigned short proto, + __wsum sum); + +extern __wsum csum_tcpudp_nofold (__be32 saddr, __be32 daddr, + unsigned short len, + unsigned short proto, + __wsum sum); + +/* + * 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 + */ +extern __wsum csum_partial(const void *buff, int len, __wsum sum); + +/* + * Same as csum_partial, but copies from src while it checksums. + * + * Here it is even more important to align src and dst on a 32-bit (or + * even better 64-bit) boundary. + */ +extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst, + int len, __wsum sum, + int *errp); + +extern __wsum csum_partial_copy_nocheck(const void *src, void *dst, + int len, __wsum sum); + +/* + * This routine is used for miscellaneous IP-like checksums, mainly in + * icmp.c + */ +extern __sum16 ip_compute_csum(const void *buff, int len); + +/* + * Fold a partial checksum without adding pseudo headers. + */ +static inline __sum16 csum_fold(__wsum csum) +{ + u32 sum = (__force u32)csum; + sum = (sum & 0xffff) + (sum >> 16); + sum = (sum & 0xffff) + (sum >> 16); + return (__force __sum16)~sum; +} + +#define _HAVE_ARCH_IPV6_CSUM 1 +struct in6_addr; +extern __sum16 csum_ipv6_magic(const struct in6_addr *saddr, + const struct in6_addr *daddr, __u32 len, unsigned short proto, + __wsum csum); + +#endif /* _ASM_IA64_CHECKSUM_H */ |