mirror of
https://github.com/openvswitch/ovs
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2d3ef70b74
IPv6 fragmentation functionality is not exported by most kernels, so backport this code from the upstream 4.3 development tree. Signed-off-by: Joe Stringer <joestringer@nicira.com> Acked-by: Pravin B Shelar <pshelar@nicira.com>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
#ifndef __NET_IPV6_WRAPPER_H
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#define __NET_IPV6_WRAPPER_H 1
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#include <linux/version.h>
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#include_next <net/ipv6.h>
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#ifndef NEXTHDR_SCTP
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#define NEXTHDR_SCTP 132 /* Stream Control Transport Protocol */
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3,3,0)
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#define ipv6_skip_exthdr rpl_ipv6_skip_exthdr
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extern int rpl_ipv6_skip_exthdr(const struct sk_buff *skb, int start,
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u8 *nexthdrp, __be16 *frag_offp);
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#endif
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#ifndef HAVE_IP6_FH_F_SKIP_RH
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enum {
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IP6_FH_F_FRAG = (1 << 0),
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IP6_FH_F_AUTH = (1 << 1),
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IP6_FH_F_SKIP_RH = (1 << 2),
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};
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/* This function is upstream, but not the version which skips routing
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* headers with 0 segments_left. We fixed it when we introduced
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* IP6_FH_F_SKIP_RH.
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*/
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#define ipv6_find_hdr rpl_ipv6_find_hdr
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extern int rpl_ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
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int target, unsigned short *fragoff, int *fragflg);
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3,6,0)
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static inline u32 ipv6_addr_hash(const struct in6_addr *a)
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{
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#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
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const unsigned long *ul = (const unsigned long *)a;
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unsigned long x = ul[0] ^ ul[1];
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return (u32)(x ^ (x >> 32));
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#else
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return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^
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a->s6_addr32[2] ^ a->s6_addr32[3]);
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#endif
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}
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#endif
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#if defined(OVS_FRAGMENT_BACKPORT) && !defined(HAVE___IPV6_ADDR_JHASH)
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static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 unused)
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{
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return ipv6_addr_jhash(a);
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}
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#endif
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#endif
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