diff options
| author | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2005-12-19 17:01:49 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-12-26 16:08:58 -0800 |
| commit | 974674b84fe907035254bc0a5257a4e1c511f156 (patch) | |
| tree | 251bcef2cca7bd6f55ce055325c6042d421cc10a | |
| parent | a7508849e7d21b89010539d54359ef8f3d89e8ec (diff) | |
[PATCH] Fix route lifetime.
The route expiration time is stored in rt6i_expires in jiffies.
The argument of rt6_route_add() for adding a route is not the
expiration time in jiffies nor in clock_t, but the lifetime
(or time left before expiration) in clock_t.
Because of the confusion, we sometimes saw several strange errors
(FAILs) in TAHI IPv6 Ready Logo Phase-2 Self Test.
The symptoms were analyzed by Mitsuru Chinen <CHINEN@jp.ibm.com>.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chris Wright <chrisw@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/ipv6/addrconf.c | 16 | ||||
| -rw-r--r-- | net/ipv6/route.c | 2 |
2 files changed, 13 insertions, 5 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index a970b4727ce8..99ca46d3a38a 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1456,9 +1456,17 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) not good. */ if (valid_lft >= 0x7FFFFFFF/HZ) - rt_expires = 0; + rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ); else - rt_expires = jiffies + valid_lft * HZ; + rt_expires = valid_lft * HZ; + + /* + * We convert this (in jiffies) to clock_t later. + * Avoid arithmetic overflow there as well. + * Overflow can happen only if HZ < USER_HZ. + */ + if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ) + rt_expires = 0x7FFFFFFF / USER_HZ; if (pinfo->onlink) { struct rt6_info *rt; @@ -1470,12 +1478,12 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len) ip6_del_rt(rt, NULL, NULL, NULL); rt = NULL; } else { - rt->rt6i_expires = rt_expires; + rt->rt6i_expires = jiffies + rt_expires; } } } else if (valid_lft) { addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, - dev, rt_expires, RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); + dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT); } if (rt) dst_release(&rt->u.dst); diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 5d5bbb49ec78..1e6f256f3578 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -829,7 +829,7 @@ int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh, } rt->u.dst.obsolete = -1; - rt->rt6i_expires = clock_t_to_jiffies(rtmsg->rtmsg_info); + rt->rt6i_expires = jiffies + clock_t_to_jiffies(rtmsg->rtmsg_info); if (nlh && (r = NLMSG_DATA(nlh))) { rt->rt6i_protocol = r->rtm_protocol; } else { |