diff options
| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-01-14 07:10:38 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-14 13:17:01 -0500 |
| commit | 38675170e4235f859bb85564c33ffa077a1c1ef7 (patch) | |
| tree | 5a2395aea57f6c500b2107d0ea1306c8ec660ba9 /include | |
| parent | 2ef973320349cd536b33427aed98512e532d4cc6 (diff) | |
ipv6: 64bit version of ipv6_prefix_equal().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ipv6.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index fe95053d02c..dfc1363a97b 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -399,6 +399,31 @@ static inline bool ipv6_addr_equal(const struct in6_addr *a1, #endif } +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 +static inline bool __ipv6_prefix_equal64_half(const __be64 *a1, + const __be64 *a2, + unsigned int len) +{ + if (len && ((*a1 ^ *a2) & cpu_to_be64(~0UL) << (64 - len))) + return false; + return true; +} + +static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, + const struct in6_addr *addr2, + unsigned int prefixlen) +{ + const __be64 *a1 = (const __be64 *)addr1; + const __be64 *a2 = (const __be64 *)addr2; + + if (prefixlen >= 64) { + if (a1[0] ^ a2[0]) + return false; + return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64); + } + return __ipv6_prefix_equal64_half(a1, a2, prefixlen); +} +#else static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, const struct in6_addr *addr2, unsigned int prefixlen) @@ -419,6 +444,7 @@ static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, return true; } +#endif struct inet_frag_queue; |