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Message-Id: <1438288494-32581-2-git-send-email-roopa@cumulusnetworks.com>
Date: Thu, 30 Jul 2015 13:34:53 -0700
From: Roopa Prabhu <roopa@...ulusnetworks.com>
To: davem@...emloft.net, tgraf@...g.ch, hannes@...essinduktion.org,
rshearma@...cade.com, stephen@...workplumber.org,
kuznet@....inr.ac.ru, jon.maloy@...csson.com
Cc: netdev@...r.kernel.org
Subject: [PATCH net-next v6 1/2] ipv6: change ipv6_stub_impl.ipv6_dst_lookup to take net argument
From: Roopa Prabhu <roopa@...ulusnetworks.com>
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@...ulusnetworks.com>
---
drivers/net/vxlan.c | 2 +-
include/net/addrconf.h | 4 ++--
include/net/ipv6.h | 3 ++-
net/ipv6/addrconf_core.c | 11 ++++++++++-
net/ipv6/icmp.c | 6 +++---
net/ipv6/ip6_output.c | 12 ++++++------
net/tipc/udp_media.c | 3 ++-
7 files changed, 26 insertions(+), 15 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 81f0f24..beed5d4 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -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++;
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index def59d3..0c3ac5a 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -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,
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 82dbdb0..09d0ea4 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -832,7 +832,8 @@ 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,
diff --git a/net/ipv6/addrconf_core.c b/net/ipv6/addrconf_core.c
index ca09bf4..bfa941f 100644
--- a/net/ipv6/addrconf_core.c
+++ b/net/ipv6/addrconf_core.c
@@ -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 */
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 713d743..6c2b213 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -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);
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index c5fc852..92b7cf0 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -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)
diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index 66deebc..c170d31 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -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);
--
1.7.10.4
--
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