Merge branches 'release' and 'wmi-2.6.25' into release

[deliverable/linux.git] / net / core / rtnetlink.c

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 4edc3dac4ccdf98459918e5736bb6a708d378925..61ac8d06292ce32b2dbe46e92f69f50bd327c398 100644 (file)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -60,7 +60,6 @@ struct rtnl_link
 };
 
 static DEFINE_MUTEX(rtnl_mutex);
-static struct sock *rtnl;
 
 void rtnl_lock(void)
 {
@@ -83,32 +82,6 @@ int rtnl_trylock(void)
        return mutex_trylock(&rtnl_mutex);
 }
 
-int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
-{
-       memset(tb, 0, sizeof(struct rtattr*)*maxattr);
-
-       while (RTA_OK(rta, len)) {
-               unsigned flavor = rta->rta_type;
-               if (flavor && flavor <= maxattr)
-                       tb[flavor-1] = rta;
-               rta = RTA_NEXT(rta, len);
-       }
-       return 0;
-}
-
-int __rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr,
-                                struct rtattr *rta, int len)
-{
-       if (RTA_PAYLOAD(rta) < len)
-               return -1;
-       if (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr)) {
-               rta = RTA_DATA(rta) + RTA_ALIGN(len);
-               return rtattr_parse_nested(tb, maxattr, rta);
-       }
-       memset(tb, 0, sizeof(struct rtattr *) * maxattr);
-       return 0;
-}
-
 static struct rtnl_link *rtnl_msg_handlers[NPROTO];
 
 static inline int rtm_msgindex(int msgtype)
@@ -443,23 +416,9 @@ void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data
        memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
 }
 
-size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
-{
-       size_t ret = RTA_PAYLOAD(rta);
-       char *src = RTA_DATA(rta);
-
-       if (ret > 0 && src[ret - 1] == '\0')
-               ret--;
-       if (size > 0) {
-               size_t len = (ret >= size) ? size - 1 : ret;
-               memset(dest, 0, size);
-               memcpy(dest, src, len);
-       }
-       return ret;
-}
-
-int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
+int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo)
 {
+       struct sock *rtnl = net->rtnl;
        int err = 0;
 
        NETLINK_CB(skb).dst_group = group;
@@ -471,14 +430,17 @@ int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
        return err;
 }
 
-int rtnl_unicast(struct sk_buff *skb, u32 pid)
+int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
 {
+       struct sock *rtnl = net->rtnl;
+
        return nlmsg_unicast(rtnl, skb, pid);
 }
 
-int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,
+int rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
                struct nlmsghdr *nlh, gfp_t flags)
 {
+       struct sock *rtnl = net->rtnl;
        int report = 0;
 
        if (nlh)
@@ -487,8 +449,10 @@ int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,
        return nlmsg_notify(rtnl, skb, pid, group, report, flags);
 }
 
-void rtnl_set_sk_err(u32 group, int error)
+void rtnl_set_sk_err(struct net *net, u32 group, int error)
 {
+       struct sock *rtnl = net->rtnl;
+
        netlink_set_err(rtnl, 0, group, error);
 }
 
@@ -703,9 +667,6 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
        int s_idx = cb->args[0];
        struct net_device *dev;
 
-       if (net != &init_net)
-               return 0;
-
        idx = 0;
        for_each_netdev(net, dev) {
                if (idx < s_idx)
@@ -908,9 +869,6 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
        struct nlattr *tb[IFLA_MAX+1];
        char ifname[IFNAMSIZ];
 
-       if (net != &init_net)
-               return -EINVAL;
-
        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
        if (err < 0)
                goto errout;
@@ -959,9 +917,6 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
        struct nlattr *tb[IFLA_MAX+1];
        int err;
 
-       if (net != &init_net)
-               return -EINVAL;
-
        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
        if (err < 0)
                return err;
@@ -1043,9 +998,6 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
        struct nlattr *linkinfo[IFLA_INFO_MAX+1];
        int err;
 
-       if (net != &init_net)
-               return -EINVAL;
-
 #ifdef CONFIG_KMOD
 replay:
 #endif
@@ -1172,9 +1124,6 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
        struct sk_buff *nskb;
        int err;
 
-       if (net != &init_net)
-               return -EINVAL;
-
        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
        if (err < 0)
                return err;
@@ -1201,7 +1150,7 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
                kfree_skb(nskb);
                goto errout;
        }
-       err = rtnl_unicast(nskb, NETLINK_CB(skb).pid);
+       err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid);
 errout:
        dev_put(dev);
 
@@ -1210,13 +1159,9 @@ errout:
 
 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
 {
-       struct net *net = skb->sk->sk_net;
        int idx;
        int s_idx = cb->family;
 
-       if (net != &init_net)
-               return 0;
-
        if (s_idx == 0)
                s_idx = 1;
        for (idx=1; idx<NPROTO; idx++) {
@@ -1238,6 +1183,7 @@ static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
 
 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
 {
+       struct net *net = dev->nd_net;
        struct sk_buff *skb;
        int err = -ENOBUFS;
 
@@ -1252,10 +1198,10 @@ void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
                kfree_skb(skb);
                goto errout;
        }
-       err = rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
+       err = rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
 errout:
        if (err < 0)
-               rtnl_set_sk_err(RTNLGRP_LINK, err);
+               rtnl_set_sk_err(net, RTNLGRP_LINK, err);
 }
 
 /* Protected by RTNL sempahore.  */
@@ -1266,6 +1212,7 @@ static int rtattr_max;
 
 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
+       struct net *net = skb->sk->sk_net;
        rtnl_doit_func doit;
        int sz_idx, kind;
        int min_len;
@@ -1294,6 +1241,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
                return -EPERM;
 
        if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
+               struct sock *rtnl;
                rtnl_dumpit_func dumpit;
 
                dumpit = rtnl_get_dumpit(family, type);
@@ -1301,6 +1249,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
                        return -EOPNOTSUPP;
 
                __rtnl_unlock();
+               rtnl = net->rtnl;
                err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
                rtnl_lock();
                return err;
@@ -1345,9 +1294,6 @@ static int rtnetlink_event(struct notifier_block *this, unsigned long event, voi
 {
        struct net_device *dev = ptr;
 
-       if (dev->nd_net != &init_net)
-               return NOTIFY_DONE;
-
        switch (event) {
        case NETDEV_UNREGISTER:
                rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
@@ -1373,6 +1319,29 @@ static struct notifier_block rtnetlink_dev_notifier = {
        .notifier_call  = rtnetlink_event,
 };
 
+
+static int rtnetlink_net_init(struct net *net)
+{
+       struct sock *sk;
+       sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX,
+                                  rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
+       if (!sk)
+               return -ENOMEM;
+       net->rtnl = sk;
+       return 0;
+}
+
+static void rtnetlink_net_exit(struct net *net)
+{
+       netlink_kernel_release(net->rtnl);
+       net->rtnl = NULL;
+}
+
+static struct pernet_operations rtnetlink_net_ops = {
+       .init = rtnetlink_net_init,
+       .exit = rtnetlink_net_exit,
+};
+
 void __init rtnetlink_init(void)
 {
        int i;
@@ -1385,10 +1354,9 @@ void __init rtnetlink_init(void)
        if (!rta_buf)
                panic("rtnetlink_init: cannot allocate rta_buf\n");
 
-       rtnl = netlink_kernel_create(&init_net, NETLINK_ROUTE, RTNLGRP_MAX,
-                                    rtnetlink_rcv, &rtnl_mutex, THIS_MODULE);
-       if (rtnl == NULL)
+       if (register_pernet_subsys(&rtnetlink_net_ops))
                panic("rtnetlink_init: cannot initialize rtnetlink\n");
+
        netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
        register_netdevice_notifier(&rtnetlink_dev_notifier);
 
@@ -1402,9 +1370,6 @@ void __init rtnetlink_init(void)
 }
 
 EXPORT_SYMBOL(__rta_fill);
-EXPORT_SYMBOL(rtattr_strlcpy);
-EXPORT_SYMBOL(rtattr_parse);
-EXPORT_SYMBOL(__rtattr_parse_nested_compat);
 EXPORT_SYMBOL(rtnetlink_put_metrics);
 EXPORT_SYMBOL(rtnl_lock);
 EXPORT_SYMBOL(rtnl_trylock);