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net/ipv6: Add fib lookup stubs for use in bpf helper

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Add stubs to retrieve a handle to an IPv6 FIB table, fib6_get_table,
a stub to do a lookup in a specific table, fib6_table_lookup, and
a stub for a full route lookup.

The stubs are needed for core bpf code to handle the case when the
IPv6 module is not builtin.

Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
David Ahern
2018-05-09 20:34:25 -07:00
committed by Daniel Borkmann
parent d4bea421f7
commit 65a2022e89
3 changed files with 51 additions and 2 deletions
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33
net/ipv6/addrconf_core.c
View File

@ -134,8 +134,39 @@ static int eafnosupport_ipv6_dst_lookup(struct net *net, struct sock *u1,
return -EAFNOSUPPORT;
}
static struct fib6_table *eafnosupport_fib6_get_table(struct net *net, u32 id)
{
return NULL;
}
static struct fib6_info *
eafnosupport_fib6_table_lookup(struct net *net, struct fib6_table *table,
int oif, struct flowi6 *fl6, int flags)
{
return NULL;
}
static struct fib6_info *
eafnosupport_fib6_lookup(struct net *net, int oif, struct flowi6 *fl6,
int flags)
{
return NULL;
}
static struct fib6_info *
eafnosupport_fib6_multipath_select(const struct net *net, struct fib6_info *f6i,
struct flowi6 *fl6, int oif,
const struct sk_buff *skb, int strict)
{
return f6i;
}
const struct ipv6_stub *ipv6_stub __read_mostly = &(struct ipv6_stub) {
.ipv6_dst_lookup = eafnosupport_ipv6_dst_lookup,
.ipv6_dst_lookup = eafnosupport_ipv6_dst_lookup,
.fib6_get_table = eafnosupport_fib6_get_table,
.fib6_table_lookup = eafnosupport_fib6_table_lookup,
.fib6_lookup = eafnosupport_fib6_lookup,
.fib6_multipath_select = eafnosupport_fib6_multipath_select,
};
EXPORT_SYMBOL_GPL(ipv6_stub);