diff options
| -rw-r--r-- | net/ipv4/devinet.c | 7 | ||||
| -rw-r--r-- | net/ipv4/fib_semantics.c | 25 | ||||
| -rw-r--r-- | net/ipv4/igmp.c | 2 | ||||
| -rw-r--r-- | net/ipv4/ip_gre.c | 4 |
4 files changed, 16 insertions, 22 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index c2ff48fa18c..dc94b0316b7 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -403,6 +403,9 @@ static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) return inet_insert_ifa(ifa); } +/* Caller must hold RCU or RTNL : + * We dont take a reference on found in_device + */ struct in_device *inetdev_by_index(struct net *net, int ifindex) { struct net_device *dev; @@ -411,7 +414,7 @@ struct in_device *inetdev_by_index(struct net *net, int ifindex) rcu_read_lock(); dev = dev_get_by_index_rcu(net, ifindex); if (dev) - in_dev = in_dev_get(dev); + in_dev = rcu_dereference_rtnl(dev->ip_ptr); rcu_read_unlock(); return in_dev; } @@ -453,8 +456,6 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg goto errout; } - __in_dev_put(in_dev); - for (ifap = &in_dev->ifa_list; (ifa = *ifap) != NULL; ifap = &ifa->ifa_next) { if (tb[IFA_LOCAL] && diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index 0f80dfc2f7f..6734c9cab24 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -590,32 +590,29 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi, if (!dev) goto out; dev_hold(dev); - err = -ENETDOWN; - if (!(dev->flags & IFF_UP)) - goto out; - err = 0; -out: - rcu_read_unlock(); - return err; + err = (dev->flags & IFF_UP) ? 0 : -ENETDOWN; } else { struct in_device *in_dev; if (nh->nh_flags & (RTNH_F_PERVASIVE | RTNH_F_ONLINK)) return -EINVAL; + rcu_read_lock(); + err = -ENODEV; in_dev = inetdev_by_index(net, nh->nh_oif); if (in_dev == NULL) - return -ENODEV; - if (!(in_dev->dev->flags & IFF_UP)) { - in_dev_put(in_dev); - return -ENETDOWN; - } + goto out; + err = -ENETDOWN; + if (!(in_dev->dev->flags & IFF_UP)) + goto out; nh->nh_dev = in_dev->dev; dev_hold(nh->nh_dev); nh->nh_scope = RT_SCOPE_HOST; - in_dev_put(in_dev); + err = 0; } - return 0; +out: + rcu_read_unlock(); + return err; } static inline unsigned int fib_laddr_hashfn(__be32 val) diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index a525328ec37..c8877c6c721 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -1429,8 +1429,6 @@ static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr) if (imr->imr_ifindex) { idev = inetdev_by_index(net, imr->imr_ifindex); - if (idev) - __in_dev_put(idev); return idev; } if (imr->imr_address.s_addr) { diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 9d421f4cf3e..d0ffcbe369b 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -1245,10 +1245,8 @@ static int ipgre_close(struct net_device *dev) if (ipv4_is_multicast(t->parms.iph.daddr) && t->mlink) { struct in_device *in_dev; in_dev = inetdev_by_index(dev_net(dev), t->mlink); - if (in_dev) { + if (in_dev) ip_mc_dec_group(in_dev, t->parms.iph.daddr); - in_dev_put(in_dev); - } } return 0; } |