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Date: Sun, 7 Mar 2010 19:14:44 +0900
From: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
To: davem@...emloft.net
CC: yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: [PATCH net-next-2.6] 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@...ux-ipv6.org>
---
include/net/ip6_route.h | 18 ++++++++++++++++++
net/ipv6/fib6_rules.c | 11 ++---------
net/ipv6/route.c | 11 ++---------
3 files changed, 22 insertions(+), 18 deletions(-)
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 4a808de..68f6783 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);
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index 551882b..5e463c4 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -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,
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index b08879e..52cd3ef 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -819,15 +819,8 @@ struct dst_entry * ip6_route_output(struct net *net, struct sock *sk,
if (!ipv6_addr_any(&fl->fl6_src))
flags |= RT6_LOOKUP_F_HAS_SADDR;
- else if (sk) {
- unsigned int prefs = inet6_sk(sk)->srcprefs;
- if (prefs & IPV6_PREFER_SRC_TMP)
- flags |= RT6_LOOKUP_F_SRCPREF_TMP;
- if (prefs & IPV6_PREFER_SRC_PUBLIC)
- flags |= RT6_LOOKUP_F_SRCPREF_PUBLIC;
- if (prefs & IPV6_PREFER_SRC_COA)
- flags |= RT6_LOOKUP_F_SRCPREF_COA;
- }
+ else if (sk)
+ flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs);
return fib6_rule_lookup(net, fl, flags, ip6_pol_route_output);
}
--
1.5.6.5
--
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