diff options
| author | David Ahern <dsahern@gmail.com> | 2019-04-23 18:05:33 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-23 21:53:11 -0700 |
| commit | a65120bae4b7425a39c5783aa3d4fc29677eef0e (patch) | |
| tree | 9314cbe3bc523ecae0c3ee46dfc244da8d7e972a | |
| parent | b2f97f7de2f6a4df8e431330cf467576486651c5 (diff) | |
| download | linux-a65120bae4b7425a39c5783aa3d4fc29677eef0e.tar.bz2 | |
ipv6: Use result arg in fib_lookup_arg consistently
arg.result is sometimes used as fib6_result and sometimes used to
hold the rt6_info. Add rt6_info to fib6_result and make the use
of arg.result consistent through ipv6 rules.
The rt6 entry is filled in for lookups returning a dst_entry, but not
for direct fib_lookups that just want a fib6_info.
Fixes: effda4dd97e8 ("ipv6: Pass fib6_result to fib lookups")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/ip6_fib.h | 1 | ||||
| -rw-r--r-- | net/ipv6/fib6_rules.c | 15 |
2 files changed, 12 insertions, 4 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h index 5a4a67b38712..40105738e2f6 100644 --- a/include/net/ip6_fib.h +++ b/include/net/ip6_fib.h @@ -195,6 +195,7 @@ struct fib6_result { struct fib6_info *f6i; u32 fib6_flags; u8 fib6_type; + struct rt6_info *rt6; }; #define for_each_fib6_node_rt_rcu(fn) \ diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c index dbedbe655c91..06d1b7763600 100644 --- a/net/ipv6/fib6_rules.c +++ b/net/ipv6/fib6_rules.c @@ -94,9 +94,11 @@ struct dst_entry *fib6_rule_lookup(struct net *net, struct flowi6 *fl6, int flags, pol_lookup_t lookup) { if (net->ipv6.fib6_has_custom_rules) { + struct fib6_result res = {}; struct fib_lookup_arg arg = { .lookup_ptr = lookup, .lookup_data = skb, + .result = &res, .flags = FIB_LOOKUP_NOREF, }; @@ -106,8 +108,8 @@ struct dst_entry *fib6_rule_lookup(struct net *net, struct flowi6 *fl6, fib_rules_lookup(net->ipv6.fib6_rules_ops, flowi6_to_flowi(fl6), flags, &arg); - if (arg.result) - return arg.result; + if (res.rt6) + return &res.rt6->dst; } else { struct rt6_info *rt; @@ -191,6 +193,7 @@ static int fib6_rule_action_alt(struct fib_rule *rule, struct flowi *flp, static int __fib6_rule_action(struct fib_rule *rule, struct flowi *flp, int flags, struct fib_lookup_arg *arg) { + struct fib6_result *res = arg->result; struct flowi6 *flp6 = &flp->u.ip6; struct rt6_info *rt = NULL; struct fib6_table *table; @@ -245,7 +248,7 @@ again: discard_pkt: dst_hold(&rt->dst); out: - arg->result = rt; + res->rt6 = rt; return err; } @@ -260,9 +263,13 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp, static bool fib6_rule_suppress(struct fib_rule *rule, struct fib_lookup_arg *arg) { - struct rt6_info *rt = (struct rt6_info *) arg->result; + struct fib6_result *res = arg->result; + struct rt6_info *rt = res->rt6; struct net_device *dev = NULL; + if (!rt) + return false; + if (rt->rt6i_idev) dev = rt->rt6i_idev->dev; |