net: kill an RCU warning in inet_fill_link_af()
commits 9f0f7272 (ipv4: AF_INET link address family) and cf7afbfeb8c
(rtnl: make link af-specific updates atomic) used incorrect
__in_dev_get_rcu() in RTNL protected contexts, triggering PROVE_RCU
warnings.
Switch to __in_dev_get_rtnl(), wich is more appropriate, since we hold
RTNL.
Based on a report and initial patch from Amerigo Wang.
Reported-by: Amerigo Wang <amwang@redhat.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Thomas Graf <tgraf@infradead.org>
Reviewed-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index d9f71ba..3b06770 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1258,7 +1258,7 @@
static size_t inet_get_link_af_size(const struct net_device *dev)
{
- struct in_device *in_dev = __in_dev_get_rcu(dev);
+ struct in_device *in_dev = __in_dev_get_rtnl(dev);
if (!in_dev)
return 0;
@@ -1268,7 +1268,7 @@
static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
{
- struct in_device *in_dev = __in_dev_get_rcu(dev);
+ struct in_device *in_dev = __in_dev_get_rtnl(dev);
struct nlattr *nla;
int i;
@@ -1295,7 +1295,7 @@
struct nlattr *a, *tb[IFLA_INET_MAX+1];
int err, rem;
- if (dev && !__in_dev_get_rcu(dev))
+ if (dev && !__in_dev_get_rtnl(dev))
return -EAFNOSUPPORT;
err = nla_parse_nested(tb, IFLA_INET_MAX, nla, inet_af_policy);
@@ -1319,7 +1319,7 @@
static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla)
{
- struct in_device *in_dev = __in_dev_get_rcu(dev);
+ struct in_device *in_dev = __in_dev_get_rtnl(dev);
struct nlattr *a, *tb[IFLA_INET_MAX+1];
int rem;