On Mon, 2014-10-27 at 14:43 +0200, Tomasz Bursztyka wrote:
> Let the other listeners being notified when a new or del interface
> command has been issued, thus reducing later necessary request to be in
> sync with current context.
I see no reason to list "wireless:" in the subject - please just use
nl80211: prefix.
> It bloats a bit nl80211_send_iface() function (I wanted to reuse its logic
> for both commands). Tell me if you would prefer a better way to do this.
I guess I'll see that below :)
It really bloats the *arguments* more than anything, no way to change
that, say by sending the delete message before the wdev is destroyed?
> @@ -2370,10 +2376,8 @@ static int nl80211_send_iface(struct sk_buff *msg, u32
> portid, u32 seq, int flag
> }
> }
>
> - if (wdev->ssid_len) {
> - if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
> + if (ssid_len && nla_put(msg, NL80211_ATTR_SSID, ssid_len, ssid))
> goto nla_put_failure;
> - }
This results in bad indentation.
> @@ -2687,10 +2725,17 @@ static int nl80211_del_interface(struct sk_buff *skb,
> struct genl_info *info)
> {
> struct cfg80211_registered_device *rdev = info->user_ptr[0];
> struct wireless_dev *wdev = info->user_ptr[1];
> + enum nl80211_iftype iftype = wdev->iftype;
> + struct net_device *dev = wdev->netdev;
> + u8 address[ETH_ALEN];
> + u64 id = wdev_id(wdev);
> + int status;
>
> if (!rdev->ops->del_virtual_intf)
> return -EOPNOTSUPP;
>
> + memcpy(address, wdev_address(wdev), ETH_ALEN);
> +
> /*
> * If we remove a wireless device without a netdev then clear
> * user_ptr[1] so that nl80211_post_doit won't dereference it
> @@ -2698,10 +2743,17 @@ static int nl80211_del_interface(struct sk_buff *skb,
> struct genl_info *info)
> * since the wdev has been freed, unlike with a netdev where
> * we need the dev_put() for the netdev to really be freed.
> */
> - if (!wdev->netdev)
> + if (!dev)
> info->user_ptr[1] = NULL;
>
> - return rdev_del_virtual_intf(rdev, wdev);
> + status = rdev_del_virtual_intf(rdev, wdev);
> + if (status < 0)
> + return status;
> +
> + nl80211_notify_iface(rdev, NULL, iftype, id, address, dev,
> + 0, NULL, false, info->snd_portid);
I'm not sure why this needs to be so late in the command, if you put it
first you don't have the whole argument bloating issue.
johannes
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