diff options
| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2010-03-07 03:14:44 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-08 02:25:53 +0300 |
| commit | 0c9a2ac1f8a2e55b3382dfc27256878a58ea49e9 (patch) | |
| tree | 0084f79428afa47efd40594cc96fd3a6b87cfc24 /include/net | |
| parent | 25dc27d17dc868aae78fd03bef3113cf586b12e5 (diff) | |
| download | linux-0c9a2ac1f8a2e55b3382dfc27256878a58ea49e9.tar.xz | |
ipv6: Optmize translation between IPV6_PREFER_SRC_xxx and RT6_LOOKUP_F_xxx.
IPV6_PREFER_SRC_xxx definitions:
| #define IPV6_PREFER_SRC_TMP 0x0001
| #define IPV6_PREFER_SRC_PUBLIC 0x0002
| #define IPV6_PREFER_SRC_COA 0x0004
RT6_LOOKUP_F_xxx definitions:
| #define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008
| #define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010
| #define RT6_LOOKUP_F_SRCPREF_COA 0x00000020
So, we can translate between these two groups by shift operation
instead of multiple 'if's.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/ip6_route.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h index 4a808de7c0f6..68f67836e146 100644 --- a/include/net/ip6_route.h +++ b/include/net/ip6_route.h @@ -37,6 +37,24 @@ struct route_info { #define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010 #define RT6_LOOKUP_F_SRCPREF_COA 0x00000020 +/* + * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate + * between IPV6_ADDR_PREFERENCES socket option values + * IPV6_PREFER_SRC_TMP = 0x1 + * IPV6_PREFER_SRC_PUBLIC = 0x2 + * IPV6_PREFER_SRC_COA = 0x4 + * and above RT6_LOOKUP_F_SRCPREF_xxx flags. + */ +static inline int rt6_srcprefs2flags(unsigned int srcprefs) +{ + /* No need to bitmask because srcprefs have only 3 bits. */ + return srcprefs << 3; +} + +static inline unsigned int rt6_flags2srcprefs(int flags) +{ + return (flags >> 3) & 7; +} extern void ip6_route_input(struct sk_buff *skb); |