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ipv6: Optmize translation between IPV6_PREFER_SRC_xxx and RT6_LOOKUP_F_xxx.

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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>
This commit is contained in:
YOSHIFUJI Hideaki / 吉藤英明
2010-03-07 00:14:44 +00:00
committed by David S. Miller
parent 25dc27d17d
commit 0c9a2ac1f8
3 changed files with 22 additions and 18 deletions
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11
net/ipv6/fib6_rules.c
View File

@ -84,18 +84,11 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
if ((rule->flags & FIB_RULE_FIND_SADDR) &&
r->src.plen && !(flags & RT6_LOOKUP_F_HAS_SADDR)) {
struct in6_addr saddr;
unsigned int srcprefs = 0;
if (flags & RT6_LOOKUP_F_SRCPREF_TMP)
srcprefs |= IPV6_PREFER_SRC_TMP;
if (flags & RT6_LOOKUP_F_SRCPREF_PUBLIC)
srcprefs |= IPV6_PREFER_SRC_PUBLIC;
if (flags & RT6_LOOKUP_F_SRCPREF_COA)
srcprefs |= IPV6_PREFER_SRC_COA;
if (ipv6_dev_get_saddr(net,
ip6_dst_idev(&rt->u.dst)->dev,
&flp->fl6_dst, srcprefs,
&flp->fl6_dst,
rt6_flags2srcprefs(flags),
&saddr))
goto again;
if (!ipv6_prefix_equal(&saddr, &r->src.addr,