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https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 08:34:20 +08:00
nl80211: fix dump callbacks
Julius Volz pointed out that the dump callbacks in nl80211 were broken and fixed one of them. This patch fixes the other three and also addresses the TODOs there. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Julius Volz <juliusv@google.com> Cc: Thomas Graf <tgraf@suug.ch> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
John W. Linville
parent
d0f0980414
commit
bba95fefb8
@ -29,16 +29,16 @@ static struct genl_family nl80211_fam = {
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};
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/* internal helper: get drv and dev */
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static int get_drv_dev_by_info_ifindex(struct genl_info *info,
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static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
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struct cfg80211_registered_device **drv,
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struct net_device **dev)
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{
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int ifindex;
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if (!info->attrs[NL80211_ATTR_IFINDEX])
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if (!attrs[NL80211_ATTR_IFINDEX])
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return -EINVAL;
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ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
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ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
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*dev = dev_get_by_index(&init_net, ifindex);
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if (!*dev)
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return -ENODEV;
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@ -291,21 +291,31 @@ static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *
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mutex_lock(&cfg80211_drv_mutex);
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list_for_each_entry(dev, &cfg80211_drv_list, list) {
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if (++wp_idx < wp_start)
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if (wp_idx < wp_start) {
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wp_idx++;
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continue;
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}
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if_idx = 0;
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mutex_lock(&dev->devlist_mtx);
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list_for_each_entry(wdev, &dev->netdev_list, list) {
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if (++if_idx < if_start)
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if (if_idx < if_start) {
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if_idx++;
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continue;
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}
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if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
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cb->nlh->nlmsg_seq, NLM_F_MULTI,
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wdev->netdev) < 0)
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break;
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wdev->netdev) < 0) {
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mutex_unlock(&dev->devlist_mtx);
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goto out;
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}
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if_idx++;
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}
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mutex_unlock(&dev->devlist_mtx);
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wp_idx++;
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}
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out:
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mutex_unlock(&cfg80211_drv_mutex);
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cb->args[0] = wp_idx;
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@ -321,7 +331,7 @@ static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
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struct net_device *netdev;
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int err;
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err = get_drv_dev_by_info_ifindex(info, &dev, &netdev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
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if (err)
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return err;
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@ -392,7 +402,7 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
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} else
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return -EINVAL;
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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ifindex = dev->ifindex;
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@ -477,7 +487,7 @@ static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
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int ifindex, err;
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struct net_device *dev;
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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ifindex = dev->ifindex;
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@ -545,7 +555,7 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
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if (info->attrs[NL80211_ATTR_MAC])
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mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -618,7 +628,7 @@ static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
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if (!info->attrs[NL80211_ATTR_KEY_DEFAULT])
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return -EINVAL;
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -699,7 +709,7 @@ static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
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return -EINVAL;
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}
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -735,7 +745,7 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
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if (info->attrs[NL80211_ATTR_MAC])
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mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -764,7 +774,7 @@ static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
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struct beacon_parameters params;
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int haveinfo = 0;
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -843,7 +853,7 @@ static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
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int err;
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struct net_device *dev;
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -937,67 +947,78 @@ static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
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}
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static int nl80211_dump_station(struct sk_buff *skb,
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struct netlink_callback *cb)
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struct netlink_callback *cb)
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{
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int wp_idx = 0;
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int if_idx = 0;
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int sta_idx = cb->args[2];
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int wp_start = cb->args[0];
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int if_start = cb->args[1];
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struct station_info sinfo;
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struct cfg80211_registered_device *dev;
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struct wireless_dev *wdev;
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struct net_device *netdev;
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u8 mac_addr[ETH_ALEN];
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int ifidx = cb->args[0];
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int sta_idx = cb->args[1];
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int err;
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int exit = 0;
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/* TODO: filter by device */
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mutex_lock(&cfg80211_drv_mutex);
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list_for_each_entry(dev, &cfg80211_drv_list, list) {
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if (exit)
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break;
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if (++wp_idx < wp_start)
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continue;
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if_idx = 0;
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if (!ifidx) {
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err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
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nl80211_fam.attrbuf, nl80211_fam.maxattr,
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nl80211_policy);
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if (err)
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return err;
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mutex_lock(&dev->devlist_mtx);
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list_for_each_entry(wdev, &dev->netdev_list, list) {
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if (exit)
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break;
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if (++if_idx < if_start)
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continue;
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if (!dev->ops->dump_station)
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continue;
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if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
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return -EINVAL;
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for (;; ++sta_idx) {
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rtnl_lock();
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err = dev->ops->dump_station(&dev->wiphy,
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wdev->netdev, sta_idx, mac_addr,
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&sinfo);
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rtnl_unlock();
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if (err) {
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sta_idx = 0;
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break;
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}
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if (nl80211_send_station(skb,
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NETLINK_CB(cb->skb).pid,
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cb->nlh->nlmsg_seq, NLM_F_MULTI,
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wdev->netdev, mac_addr,
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&sinfo) < 0) {
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exit = 1;
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break;
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}
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}
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}
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mutex_unlock(&dev->devlist_mtx);
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ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
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if (!ifidx)
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return -EINVAL;
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}
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mutex_unlock(&cfg80211_drv_mutex);
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cb->args[0] = wp_idx;
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cb->args[1] = if_idx;
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cb->args[2] = sta_idx;
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netdev = dev_get_by_index(&init_net, ifidx);
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if (!netdev)
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return -ENODEV;
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return skb->len;
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dev = cfg80211_get_dev_from_ifindex(ifidx);
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if (IS_ERR(dev)) {
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err = PTR_ERR(dev);
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goto out_put_netdev;
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}
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if (!dev->ops->dump_station) {
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err = -ENOSYS;
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goto out_err;
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}
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rtnl_lock();
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while (1) {
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err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
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mac_addr, &sinfo);
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if (err == -ENOENT)
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break;
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if (err)
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goto out_err_rtnl;
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if (nl80211_send_station(skb,
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NETLINK_CB(cb->skb).pid,
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cb->nlh->nlmsg_seq, NLM_F_MULTI,
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netdev, mac_addr,
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&sinfo) < 0)
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goto out;
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sta_idx++;
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}
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out:
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cb->args[1] = sta_idx;
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err = skb->len;
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out_err_rtnl:
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rtnl_unlock();
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out_err:
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cfg80211_put_dev(dev);
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out_put_netdev:
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dev_put(netdev);
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return err;
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}
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static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
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@ -1016,7 +1037,7 @@ static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
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mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -1112,7 +1133,7 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
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params.plink_action =
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nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -1172,7 +1193,7 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
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¶ms.station_flags))
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return -EINVAL;
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -1207,7 +1228,7 @@ static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
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if (info->attrs[NL80211_ATTR_MAC])
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mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -1277,68 +1298,78 @@ static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
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}
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static int nl80211_dump_mpath(struct sk_buff *skb,
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struct netlink_callback *cb)
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struct netlink_callback *cb)
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{
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int wp_idx = 0;
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int if_idx = 0;
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int sta_idx = cb->args[2];
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int wp_start = cb->args[0];
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int if_start = cb->args[1];
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struct mpath_info pinfo;
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struct cfg80211_registered_device *dev;
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struct wireless_dev *wdev;
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struct net_device *netdev;
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u8 dst[ETH_ALEN];
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u8 next_hop[ETH_ALEN];
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int ifidx = cb->args[0];
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int path_idx = cb->args[1];
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int err;
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int exit = 0;
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/* TODO: filter by device */
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mutex_lock(&cfg80211_drv_mutex);
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list_for_each_entry(dev, &cfg80211_drv_list, list) {
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if (exit)
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break;
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if (++wp_idx < wp_start)
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continue;
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if_idx = 0;
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if (!ifidx) {
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err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
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nl80211_fam.attrbuf, nl80211_fam.maxattr,
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nl80211_policy);
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if (err)
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return err;
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mutex_lock(&dev->devlist_mtx);
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list_for_each_entry(wdev, &dev->netdev_list, list) {
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if (exit)
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break;
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if (++if_idx < if_start)
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continue;
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if (!dev->ops->dump_mpath)
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continue;
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if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
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return -EINVAL;
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for (;; ++sta_idx) {
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rtnl_lock();
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err = dev->ops->dump_mpath(&dev->wiphy,
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wdev->netdev, sta_idx, dst,
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next_hop, &pinfo);
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rtnl_unlock();
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if (err) {
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sta_idx = 0;
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break;
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}
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if (nl80211_send_mpath(skb,
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NETLINK_CB(cb->skb).pid,
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cb->nlh->nlmsg_seq, NLM_F_MULTI,
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wdev->netdev, dst, next_hop,
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&pinfo) < 0) {
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exit = 1;
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break;
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}
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}
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}
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mutex_unlock(&dev->devlist_mtx);
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ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
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if (!ifidx)
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return -EINVAL;
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}
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mutex_unlock(&cfg80211_drv_mutex);
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cb->args[0] = wp_idx;
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cb->args[1] = if_idx;
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cb->args[2] = sta_idx;
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netdev = dev_get_by_index(&init_net, ifidx);
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if (!netdev)
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return -ENODEV;
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return skb->len;
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dev = cfg80211_get_dev_from_ifindex(ifidx);
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if (IS_ERR(dev)) {
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err = PTR_ERR(dev);
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goto out_put_netdev;
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}
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if (!dev->ops->dump_mpath) {
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err = -ENOSYS;
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goto out_err;
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}
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rtnl_lock();
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while (1) {
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err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
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dst, next_hop, &pinfo);
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if (err == -ENOENT)
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break;
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if (err)
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goto out_err_rtnl;
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if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
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cb->nlh->nlmsg_seq, NLM_F_MULTI,
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netdev, dst, next_hop,
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&pinfo) < 0)
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goto out;
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path_idx++;
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}
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out:
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cb->args[1] = path_idx;
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err = skb->len;
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out_err_rtnl:
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rtnl_unlock();
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out_err:
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cfg80211_put_dev(dev);
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out_put_netdev:
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dev_put(netdev);
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return err;
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}
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static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
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@ -1358,7 +1389,7 @@ static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
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dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
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if (err)
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return err;
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@ -1411,7 +1442,7 @@ static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
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dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
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next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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||||
err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
@ -1446,7 +1477,7 @@ static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
|
||||
dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
|
||||
next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
|
||||
|
||||
err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
|
||||
err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
@ -1475,7 +1506,7 @@ static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
|
||||
if (info->attrs[NL80211_ATTR_MAC])
|
||||
dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
|
||||
|
||||
err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
|
||||
err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user