nl80211: use generic check for netif_running

Use a new flag that requires the netdev to be
UP and use it to check instead of coding the
check into all functions that require it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 28 insertions, 69 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index a96da47d0640..ca8d04cb172f 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -411,9 +411,6 @@ static int nl80211_key_allowed(struct wireless_dev *wdev)
 {
         ASSERT_WDEV_LOCK(wdev);
 
-        if (!netif_running(wdev->netdev))
-                return -ENETDOWN;
-
         switch (wdev->iftype) {
         case NL80211_IFTYPE_AP:
         case NL80211_IFTYPE_AP_VLAN:
@@ -2083,11 +2080,6 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
                 goto out;
         }
 
-        if (!netif_running(dev)) {
-                err = -ENETDOWN;
-                goto out;
-        }
-
         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
 
  out:
@@ -2301,9 +2293,6 @@ static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
 }
 
@@ -2329,9 +2318,6 @@ static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
 }
 
@@ -2823,9 +2809,6 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
         if (!rdev->ops->scan)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         if (rdev->scan_req)
                 return -EBUSY;
 
@@ -3296,9 +3279,6 @@ static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
         chan = ieee80211_get_channel(&rdev->wiphy,
                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
@@ -3429,9 +3409,6 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
 
         chan = ieee80211_get_channel(&rdev->wiphy,
@@ -3493,9 +3470,6 @@ static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
 
         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
@@ -3540,9 +3514,6 @@ static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
 
         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
@@ -3596,9 +3567,6 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         wiphy = &rdev->wiphy;
 
         if (info->attrs[NL80211_ATTR_MAC])
@@ -3673,9 +3641,6 @@ static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         return cfg80211_leave_ibss(rdev, dev, false);
 }
 
@@ -3826,9 +3791,6 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         wiphy = &rdev->wiphy;
 
         if (info->attrs[NL80211_ATTR_MAC])
@@ -3881,9 +3843,6 @@ static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         return cfg80211_disconnect(rdev, dev, reason, true);
 }
 
@@ -3998,9 +3957,6 @@ static int nl80211_remain_on_channel(struct sk_buff *skb,
         if (!rdev->ops->remain_on_channel)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
                 channel_type = nla_get_u32(
                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
@@ -4060,9 +4016,6 @@ static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
         if (!rdev->ops->cancel_remain_on_channel)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
 
         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
@@ -4207,9 +4160,6 @@ static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
                 return -EOPNOTSUPP;
 
-        if (!netif_running(dev))
-                return -ENETDOWN;
-
         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
                 channel_type = nla_get_u32(
                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
@@ -4398,6 +4348,9 @@ out:
 #define NL80211_FLAG_NEED_WIPHY         0x01
 #define NL80211_FLAG_NEED_NETDEV        0x02
 #define NL80211_FLAG_NEED_RTNL          0x04
+#define NL80211_FLAG_CHECK_NETDEV_UP    0x08
+#define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
+                                         NL80211_FLAG_CHECK_NETDEV_UP)
 
 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
                             struct genl_info *info)
@@ -4425,6 +4378,12 @@ static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
                                 rtnl_unlock();
                         return err;
                 }
+                if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
+                    !netif_running(dev)) {
+                        if (rtnl)
+                                rtnl_unlock();
+                        return -ENETDOWN;
+                }
                 info->user_ptr[0] = rdev;
                 info->user_ptr[1] = dev;
         }
@@ -4504,7 +4463,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_set_key,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4512,7 +4471,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_new_key,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4520,7 +4479,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_del_key,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4568,7 +4527,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_new_station,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4585,7 +4544,7 @@ static struct genl_ops nl80211_ops[] = {
                 .dumpit = nl80211_dump_mpath,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4593,7 +4552,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_set_mpath,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4601,7 +4560,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_new_mpath,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4659,7 +4618,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_trigger_scan,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4672,7 +4631,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_authenticate,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4680,7 +4639,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_associate,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4688,7 +4647,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_deauthenticate,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4696,7 +4655,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_disassociate,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4704,7 +4663,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_join_ibss,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4712,7 +4671,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_leave_ibss,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
 #ifdef CONFIG_NL80211_TESTMODE
@@ -4730,7 +4689,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_connect,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4738,7 +4697,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_disconnect,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4783,7 +4742,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_remain_on_channel,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4791,7 +4750,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_cancel_remain_on_channel,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {
@@ -4815,7 +4774,7 @@ static struct genl_ops nl80211_ops[] = {
                 .doit = nl80211_tx_mgmt,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
-                .internal_flags = NL80211_FLAG_NEED_NETDEV |
+                .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
                                   NL80211_FLAG_NEED_RTNL,
         },
         {