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Date: Thu, 15 May 2008 18:18:26 +0900 (JST)
From: YOSHIFUJI Hideaki / 吉藤英明
<yoshfuji@...ux-ipv6.org>
To: davem@...emloft.net
Cc: yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: [PATCH net-2.6 4/4] [IPV6] ADDRCONF: Allow longer lifetime on
64bit archs.
Allow longer lifetimes (>= 0x7fffffff/HZ) on 64bit archs
by using unsigned long.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
---
net/ipv6/addrconf.c | 22 +++++++++++++++++++---
net/ipv6/route.c | 4 +++-
2 files changed, 22 insertions(+), 4 deletions(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 3a78021..0d89370 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -731,8 +731,11 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
onlink = -1;
spin_lock(&ifa->lock);
- lifetime = min_t(unsigned long,
- ifa->valid_lft, 0x7fffffffUL/HZ);
+ lifetime = ifa->valid_lft;
+#if BITS_PER_LONG < 64
+ if (lifetime > 0x7FFFFFFFUL/HZ)
+ lifetime = 0x7FFFFFFFUL/HZ;
+#endif
if (time_before(expires,
ifa->tstamp + lifetime * HZ))
expires = ifa->tstamp + lifetime * HZ;
@@ -1766,6 +1769,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
if (valid_lft == INFINITY_LIFE_TIME)
rt_expires = ~0UL;
+#if BITS_PER_LONG < 64
else if (valid_lft >= 0x7FFFFFFF/HZ) {
/* Avoid arithmetic overflow. Really, we could
* save rt_expires in seconds, likely valid_lft,
@@ -1773,9 +1777,12 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
* not good.
*/
rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
- } else
+ }
+#endif
+ else
rt_expires = valid_lft * HZ;
+#if BITS_PER_LONG < 64
/*
* We convert this (in jiffies) to clock_t later.
* Avoid arithmetic overflow there as well.
@@ -1783,6 +1790,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
*/
if (HZ < USER_HZ && ~rt_expires && rt_expires > 0x7FFFFFFF / USER_HZ)
rt_expires = 0x7FFFFFFF / USER_HZ;
+#endif
if (pinfo->onlink) {
struct rt6_info *rt;
@@ -2057,17 +2065,21 @@ static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
flags = 0;
expires = 0;
} else {
+#if BITS_PER_LONG < 64
if (valid_lft >= 0x7FFFFFFF/HZ)
valid_lft = 0x7FFFFFFF/HZ;
+#endif
flags = RTF_EXPIRES;
expires = jiffies_to_clock_t(valid_lft * HZ);
}
if (prefered_lft == 0)
ifa_flags |= IFA_F_DEPRECATED;
+#if BITS_PER_LONG < 64
else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
(prefered_lft != INFINITY_LIFE_TIME))
prefered_lft = 0x7FFFFFFF/HZ;
+#endif
ifp = ipv6_add_addr(idev, pfx, plen, scope, ifa_flags);
@@ -3178,17 +3190,21 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
flags = 0;
expires = 0;
} else {
+#if BITS_PER_LONG < 64
if (valid_lft >= 0x7FFFFFFF/HZ)
valid_lft = 0x7FFFFFFF/HZ;
+#endif
flags = RTF_EXPIRES;
expires = jiffies_to_clock_t(valid_lft * HZ);
}
if (prefered_lft == 0)
ifa_flags |= IFA_F_DEPRECATED;
+#if BITS_PER_LONG < 64
else if ((prefered_lft >= 0x7FFFFFFF/HZ) &&
(prefered_lft != INFINITY_LIFE_TIME))
prefered_lft = 0x7FFFFFFF/HZ;
+#endif
spin_lock_bh(&ifp->lock);
ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index b7a4a87..e35bf90 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -446,7 +446,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
struct route_info *rinfo = (struct route_info *) opt;
struct in6_addr prefix_buf, *prefix;
unsigned int pref;
- u32 lifetime;
+ unsigned long lifetime;
struct rt6_info *rt;
if (len < sizeof(struct route_info)) {
@@ -473,12 +473,14 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
pref = ICMPV6_ROUTER_PREF_MEDIUM;
lifetime = ntohl(rinfo->lifetime);
+#if BITS_PER_LONG < 64
if (lifetime == 0xffffffff) {
/* infinity */
} else if (lifetime > 0x7fffffff/HZ - 1) {
/* Avoid arithmetic overflow */
lifetime = 0x7fffffff/HZ - 1;
}
+#endif
if (rinfo->length == 3)
prefix = (struct in6_addr *)rinfo->prefix;
--
1.4.4.4
--
YOSHIFUJI Hideaki @ USAGI Project <yoshfuji@...ux-ipv6.org>
GPG-FP : 9022 65EB 1ECF 3AD1 0BDF 80D8 4807 F894 E062 0EEA
--
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