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ipv6: change ipv6_stub_impl.ipv6_dst_lookup to take net argument

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This patch adds net argument to ipv6_stub_impl.ipv6_dst_lookup
for use cases where sk is not available (like mpls).
sk appears to be needed to get the namespace 'net' and is optional
otherwise. This patch series changes ipv6_stub_impl.ipv6_dst_lookup
to take net argument. sk remains optional.

All callers of ipv6_stub_impl.ipv6_dst_lookup have been modified
to pass net. I have modified them to use already available
'net' in the scope of the call. I can change them to
sock_net(sk) to avoid any unintended change in behaviour if sock
namespace is different. They dont seem to be from code inspection.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2015-07-30 13:34:53 -07:00 committed by David S. Miller
parent d3aa45ce6b
commit 343d60aada
7 changed files with 26 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/vxlan.c
View File

@ -2034,7 +2034,7 @@ static void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
fl6.flowi6_mark = skb->mark;
fl6.flowi6_proto = IPPROTO_UDP;
if (ipv6_stub->ipv6_dst_lookup(sk, &ndst, &fl6)) {
if (ipv6_stub->ipv6_dst_lookup(vxlan->net, sk, &ndst, &fl6)) {
netdev_dbg(dev, "no route to %pI6\n",
&dst->sin6.sin6_addr);
dev->stats.tx_carrier_errors++;

4
include/net/addrconf.h
View File

@ -158,8 +158,8 @@ struct ipv6_stub {
const struct in6_addr *addr);
int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
const struct in6_addr *addr);
int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
struct flowi6 *fl6);
int (*ipv6_dst_lookup)(struct net *net, struct sock *sk,
struct dst_entry **dst, struct flowi6 *fl6);
void (*udpv6_encap_enable)(void);
void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
const struct in6_addr *daddr,

3
include/net/ipv6.h
View File

@ -813,7 +813,8 @@ static inline struct sk_buff *ip6_finish_skb(struct sock *sk)
&inet6_sk(sk)->cork);
}
int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi6 *fl6);
int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst,
struct flowi6 *fl6);
struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
const struct in6_addr *final_dst);
struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,

11
net/ipv6/addrconf_core.c
View File

@ -107,7 +107,16 @@ int inet6addr_notifier_call_chain(unsigned long val, void *v)
}
EXPORT_SYMBOL(inet6addr_notifier_call_chain);
const struct ipv6_stub *ipv6_stub __read_mostly;
static int eafnosupport_ipv6_dst_lookup(struct net *net, struct sock *u1,
struct dst_entry **u2,
struct flowi6 *u3)
{
return -EAFNOSUPPORT;
}
const struct ipv6_stub *ipv6_stub __read_mostly = &(struct ipv6_stub) {
.ipv6_dst_lookup = eafnosupport_ipv6_dst_lookup,
};
EXPORT_SYMBOL_GPL(ipv6_stub);
/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */

6
net/ipv6/icmp.c
View File

@ -329,7 +329,7 @@ static struct dst_entry *icmpv6_route_lookup(struct net *net,
struct flowi6 fl2;
int err;
err = ip6_dst_lookup(sk, &dst, fl6);
err = ip6_dst_lookup(net, sk, &dst, fl6);
if (err)
return ERR_PTR(err);
@ -361,7 +361,7 @@ static struct dst_entry *icmpv6_route_lookup(struct net *net,
if (err)
goto relookup_failed;
err = ip6_dst_lookup(sk, &dst2, &fl2);
err = ip6_dst_lookup(net, sk, &dst2, &fl2);
if (err)
goto relookup_failed;
@ -591,7 +591,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
else if (!fl6.flowi6_oif)
fl6.flowi6_oif = np->ucast_oif;
err = ip6_dst_lookup(sk, &dst, &fl6);
err = ip6_dst_lookup(net, sk, &dst, &fl6);
if (err)
goto out;
dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), sk, 0);

12
net/ipv6/ip6_output.c
View File

@ -881,10 +881,9 @@ out:
return dst;
}
static int ip6_dst_lookup_tail(struct sock *sk,
static int ip6_dst_lookup_tail(struct net *net, struct sock *sk,
struct dst_entry **dst, struct flowi6 *fl6)
{
struct net *net = sock_net(sk);
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
struct neighbour *n;
struct rt6_info *rt;
@ -994,10 +993,11 @@ out_err_release:
*
* It returns zero on success, or a standard errno code on error.
*/
int ip6_dst_lookup(struct sock *sk, struct dst_entry **dst, struct flowi6 *fl6)
int ip6_dst_lookup(struct net *net, struct sock *sk, struct dst_entry **dst,
struct flowi6 *fl6)
{
*dst = NULL;
return ip6_dst_lookup_tail(sk, dst, fl6);
return ip6_dst_lookup_tail(net, sk, dst, fl6);
}
EXPORT_SYMBOL_GPL(ip6_dst_lookup);
@ -1018,7 +1018,7 @@ struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
struct dst_entry *dst = NULL;
int err;
err = ip6_dst_lookup_tail(sk, &dst, fl6);
err = ip6_dst_lookup_tail(sock_net(sk), sk, &dst, fl6);
if (err)
return ERR_PTR(err);
if (final_dst)
@ -1052,7 +1052,7 @@ struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
dst = ip6_sk_dst_check(sk, dst, fl6);
err = ip6_dst_lookup_tail(sk, &dst, fl6);
err = ip6_dst_lookup_tail(sock_net(sk), sk, &dst, fl6);
if (err)
return ERR_PTR(err);
if (final_dst)

3
net/tipc/udp_media.c
View File

@ -194,7 +194,8 @@ static int tipc_udp_send_msg(struct net *net, struct sk_buff *skb,
.saddr = src->ipv6,
.flowi6_proto = IPPROTO_UDP
};
err = ipv6_stub->ipv6_dst_lookup(ub->ubsock->sk, &ndst, &fl6);
err = ipv6_stub->ipv6_dst_lookup(net, ub->ubsock->sk, &ndst,
&fl6);
if (err)
goto tx_error;
ttl = ip6_dst_hoplimit(ndst);