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Revert "ipv4: restore rt->fi for reference counting"

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This reverts commit 82486aa6f1.

As implemented, this causes dangling netdevice refs.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2017-05-08 22:35:32 -04:00
parent 922c60e89d
commit 32f1bc0f3d
2 changed files with 1 additions and 18 deletions
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1
include/net/route.h
View File

@ -69,7 +69,6 @@ struct rtable {
struct list_head rt_uncached;
struct uncached_list *rt_uncached_list;
struct fib_info *fi; /* for refcnt to shared metrics */
};
static inline bool rt_is_input_route(const struct rtable *rt)

18
net/ipv4/route.c
View File

@ -1387,11 +1387,6 @@ static void ipv4_dst_destroy(struct dst_entry *dst)
{
struct rtable *rt = (struct rtable *) dst;
if (rt->fi) {
fib_info_put(rt->fi);
rt->fi = NULL;
}
if (!list_empty(&rt->rt_uncached)) {
struct uncached_list *ul = rt->rt_uncached_list;
@ -1429,16 +1424,6 @@ static bool rt_cache_valid(const struct rtable *rt)
!rt_is_expired(rt);
}
static void rt_init_metrics(struct rtable *rt, struct fib_info *fi)
{
if (fi->fib_metrics != (u32 *)dst_default_metrics) {
fib_info_hold(fi);
rt->fi = fi;
}
dst_init_metrics(&rt->dst, fi->fib_metrics, true);
}
static void rt_set_nexthop(struct rtable *rt, __be32 daddr,
const struct fib_result *res,
struct fib_nh_exception *fnhe,
@ -1453,7 +1438,7 @@ static void rt_set_nexthop(struct rtable *rt, __be32 daddr,
rt->rt_gateway = nh->nh_gw;
rt->rt_uses_gateway = 1;
}
rt_init_metrics(rt, fi);
dst_init_metrics(&rt->dst, fi->fib_metrics, true);
#ifdef CONFIG_IP_ROUTE_CLASSID
rt->dst.tclassid = nh->nh_tclassid;
#endif
@ -1505,7 +1490,6 @@ struct rtable *rt_dst_alloc(struct net_device *dev,
rt->rt_gateway = 0;
rt->rt_uses_gateway = 0;
rt->rt_table_id = 0;
rt->fi = NULL;
INIT_LIST_HEAD(&rt->rt_uncached);
rt->dst.output = ip_output;