diff options
| -rw-r--r-- | net/ipv4/devinet.c | 53 |
1 files changed, 37 insertions, 16 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 398e7b9ca66..0487677729c 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -88,7 +88,7 @@ static struct nla_policy ifa_ipv4_policy[IFA_MAX+1] __read_mostly = { [IFA_LABEL] = { .type = NLA_STRING }, }; -static void rtmsg_ifa(int event, struct in_ifaddr *); +static void rtmsg_ifa(int event, struct in_ifaddr *, struct nlmsghdr *, u32); static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, @@ -239,8 +239,8 @@ int inet_addr_onlink(struct in_device *in_dev, u32 a, u32 b) return 0; } -static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, - int destroy) +static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, + int destroy, struct nlmsghdr *nlh, u32 pid) { struct in_ifaddr *promote = NULL; struct in_ifaddr *ifa, *ifa1 = *ifap; @@ -273,7 +273,7 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, if (!do_promote) { *ifap1 = ifa->ifa_next; - rtmsg_ifa(RTM_DELADDR, ifa); + rtmsg_ifa(RTM_DELADDR, ifa, nlh, pid); blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa); inet_free_ifa(ifa); @@ -298,7 +298,7 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, is valid, it will try to restore deleted routes... Grr. So that, this order is correct. */ - rtmsg_ifa(RTM_DELADDR, ifa1); + rtmsg_ifa(RTM_DELADDR, ifa1, nlh, pid); blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); if (promote) { @@ -310,7 +310,7 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, } promote->ifa_flags &= ~IFA_F_SECONDARY; - rtmsg_ifa(RTM_NEWADDR, promote); + rtmsg_ifa(RTM_NEWADDR, promote, nlh, pid); blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, promote); for (ifa = promote->ifa_next; ifa; ifa = ifa->ifa_next) { @@ -329,7 +329,14 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, } } -static int inet_insert_ifa(struct in_ifaddr *ifa) +static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, + int destroy) +{ + __inet_del_ifa(in_dev, ifap, destroy, NULL, 0); +} + +static int __inet_insert_ifa(struct in_ifaddr *ifa, struct nlmsghdr *nlh, + u32 pid) { struct in_device *in_dev = ifa->ifa_dev; struct in_ifaddr *ifa1, **ifap, **last_primary; @@ -374,12 +381,17 @@ static int inet_insert_ifa(struct in_ifaddr *ifa) /* Send message first, then call notifier. Notifier will trigger FIB update, so that listeners of netlink will know about new ifaddr */ - rtmsg_ifa(RTM_NEWADDR, ifa); + rtmsg_ifa(RTM_NEWADDR, ifa, nlh, pid); blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); return 0; } +static int inet_insert_ifa(struct in_ifaddr *ifa) +{ + return __inet_insert_ifa(ifa, NULL, 0); +} + static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa) { struct in_device *in_dev = __in_dev_get_rtnl(dev); @@ -466,7 +478,7 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg !inet_ifa_match(nla_get_u32(tb[IFA_ADDRESS]), ifa))) continue; - inet_del_ifa(in_dev, ifap, 1); + __inet_del_ifa(in_dev, ifap, 1, nlh, NETLINK_CB(skb).pid); return 0; } @@ -558,7 +570,7 @@ static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg if (IS_ERR(ifa)) return PTR_ERR(ifa); - return inet_insert_ifa(ifa); + return __inet_insert_ifa(ifa, nlh, NETLINK_CB(skb).pid); } /* @@ -1189,18 +1201,27 @@ done: return skb->len; } -static void rtmsg_ifa(int event, struct in_ifaddr* ifa) +static void rtmsg_ifa(int event, struct in_ifaddr* ifa, struct nlmsghdr *nlh, + u32 pid) { struct sk_buff *skb; + u32 seq = nlh ? nlh->nlmsg_seq : 0; + int err = -ENOBUFS; skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (skb == NULL) - netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, ENOBUFS); - else if (inet_fill_ifaddr(skb, ifa, 0, 0, event, 0) < 0) { + goto errout; + + err = inet_fill_ifaddr(skb, ifa, pid, seq, event, 0); + if (err < 0) { kfree_skb(skb); - netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, EINVAL); - } else - netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV4_IFADDR, GFP_KERNEL); + goto errout; + } + + err = rtnl_notify(skb, pid, RTNLGRP_IPV4_IFADDR, nlh, GFP_KERNEL); +errout: + if (err < 0) + rtnl_set_sk_err(RTNLGRP_IPV4_IFADDR, err); } static struct rtnetlink_link inet_rtnetlink_table[RTM_NR_MSGTYPES] = { |