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ipv6: Refactor fib6_ignore_linkdown 

fib6_ignore_linkdown takes a fib6_info but only looks at the net_device
and its IPv6 config. Change it to take a net_device over a fib6_info as
its input argument.

In addition, move it to a header file to make the check inline and usable
later with IPv4 code without going through the ipv6 stub, and rename to
ip6_ignore_linkdown since it is only checking the setting based on the
ipv6 struct on a device.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2019-03-27 20:53:53 -07:00 committed by David S. Miller
parent 2b2450ca4a
commit 6d3d07b45c
2 changed files with 11 additions and 18 deletions
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8
include/net/addrconf.h
View File

@ -425,6 +425,14 @@ static inline void in6_dev_hold(struct inet6_dev *idev)
refcount_inc(&idev->refcnt);
}
/* called with rcu_read_lock held */
static inline bool ip6_ignore_linkdown(const struct net_device *dev)
{
const struct inet6_dev *idev = __in6_dev_get(dev);
return !!idev->cnf.ignore_routes_with_linkdown;
}
void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
static inline void in6_ifa_put(struct inet6_ifaddr *ifp)

21
net/ipv6/route.c
View File

@ -639,21 +639,6 @@ static int rt6_score_route(struct fib6_info *rt, int oif, int strict)
return m;
}
/* called with rc_read_lock held */
static inline bool fib6_ignore_linkdown(const struct fib6_info *f6i)
{
const struct net_device *dev = fib6_info_nh_dev(f6i);
bool rc = false;
if (dev) {
const struct inet6_dev *idev = __in6_dev_get(dev);
rc = !!idev->cnf.ignore_routes_with_linkdown;
}
return rc;
}
static struct fib6_info *find_match(struct fib6_info *rt, int oif, int strict,
int *mpri, struct fib6_info *match,
bool *do_rr)
@ -664,7 +649,7 @@ static struct fib6_info *find_match(struct fib6_info *rt, int oif, int strict,
if (rt->fib6_nh.nh_flags & RTNH_F_DEAD)
goto out;
if (fib6_ignore_linkdown(rt) &&
if (ip6_ignore_linkdown(rt->fib6_nh.nh_dev) &&
rt->fib6_nh.nh_flags & RTNH_F_LINKDOWN &&
!(strict & RT6_LOOKUP_F_IGNORE_LINKSTATE))
goto out;
@ -3875,7 +3860,7 @@ static bool rt6_is_dead(const struct fib6_info *rt)
{
if (rt->fib6_nh.nh_flags & RTNH_F_DEAD ||
(rt->fib6_nh.nh_flags & RTNH_F_LINKDOWN &&
fib6_ignore_linkdown(rt)))
ip6_ignore_linkdown(rt->fib6_nh.nh_dev)))
return true;
return false;
@ -4608,7 +4593,7 @@ static int rt6_nexthop_info(struct sk_buff *skb, struct fib6_info *rt,
*flags |= RTNH_F_LINKDOWN;
rcu_read_lock();
if (fib6_ignore_linkdown(rt))
if (ip6_ignore_linkdown(rt->fib6_nh.nh_dev))
*flags |= RTNH_F_DEAD;
rcu_read_unlock();
}