nl80211/cfg80211: support for mesh, sta dumping

Added support for mesh id and mesh path operation as well as
station structure dumping.

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 416 insertions, 22 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 5b3474798b8d..64a7460af734 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -81,8 +81,12 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
                                                .len = NL80211_MAX_SUPP_RATES },
+        [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
         [NL80211_ATTR_MNTR_FLAGS] = { .type = NLA_NESTED },
+        [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
+                                .len = IEEE80211_MAX_MESH_ID_LEN },
+        [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 };
 
 /* message building helper */
@@ -369,11 +373,14 @@ static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
 {
         struct cfg80211_registered_device *drv;
+        struct vif_params params;
         int err, ifindex;
         enum nl80211_iftype type;
         struct net_device *dev;
         u32 flags;
 
+        memset(&params, 0, sizeof(params));
+
         if (info->attrs[NL80211_ATTR_IFTYPE]) {
                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
                 if (type > NL80211_IFTYPE_MAX)
@@ -392,12 +399,18 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
                 goto unlock;
         }
 
+        if (type == NL80211_IFTYPE_MESH_POINT &&
+            info->attrs[NL80211_ATTR_MESH_ID]) {
+                params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
+                params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
+        }
+
         rtnl_lock();
         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
                                   &flags);
         err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
-                                            type, err ? NULL : &flags);
+                                            type, err ? NULL : &flags, &params);
         rtnl_unlock();
 
  unlock:
@@ -408,10 +421,13 @@ static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
 {
         struct cfg80211_registered_device *drv;
+        struct vif_params params;
         int err;
         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
         u32 flags;
 
+        memset(&params, 0, sizeof(params));
+
         if (!info->attrs[NL80211_ATTR_IFNAME])
                 return -EINVAL;
 
@@ -430,15 +446,22 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
                 goto unlock;
         }
 
+        if (type == NL80211_IFTYPE_MESH_POINT &&
+            info->attrs[NL80211_ATTR_MESH_ID]) {
+                params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
+                params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
+        }
+
         rtnl_lock();
         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
                                   &flags);
         err = drv->ops->add_virtual_intf(&drv->wiphy,
                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
-                type, err ? NULL : &flags);
+                type, err ? NULL : &flags, &params);
         rtnl_unlock();
 
+
  unlock:
         cfg80211_put_dev(drv);
         return err;
@@ -866,10 +889,10 @@ static int parse_station_flags(struct nlattr *nla, u32 *staflags)
 
 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
                                 int flags, struct net_device *dev,
-                                u8 *mac_addr, struct station_stats *stats)
+                                u8 *mac_addr, struct station_info *sinfo)
 {
         void *hdr;
-        struct nlattr *statsattr;
+        struct nlattr *sinfoattr;
 
         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
         if (!hdr)
@@ -878,20 +901,29 @@ static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
 
-        statsattr = nla_nest_start(msg, NL80211_ATTR_STA_STATS);
-        if (!statsattr)
+        sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
+        if (!sinfoattr)
                 goto nla_put_failure;
-        if (stats->filled & STATION_STAT_INACTIVE_TIME)
-                NLA_PUT_U32(msg, NL80211_STA_STAT_INACTIVE_TIME,
-                            stats->inactive_time);
-        if (stats->filled & STATION_STAT_RX_BYTES)
-                NLA_PUT_U32(msg, NL80211_STA_STAT_RX_BYTES,
-                            stats->rx_bytes);
-        if (stats->filled & STATION_STAT_TX_BYTES)
-                NLA_PUT_U32(msg, NL80211_STA_STAT_TX_BYTES,
-                            stats->tx_bytes);
-
-        nla_nest_end(msg, statsattr);
+        if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
+                NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
+                            sinfo->inactive_time);
+        if (sinfo->filled & STATION_INFO_RX_BYTES)
+                NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
+                            sinfo->rx_bytes);
+        if (sinfo->filled & STATION_INFO_TX_BYTES)
+                NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
+                            sinfo->tx_bytes);
+        if (sinfo->filled & STATION_INFO_LLID)
+                NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
+                            sinfo->llid);
+        if (sinfo->filled & STATION_INFO_PLID)
+                NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
+                            sinfo->plid);
+        if (sinfo->filled & STATION_INFO_PLINK_STATE)
+                NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
+                            sinfo->plink_state);
+
+        nla_nest_end(msg, sinfoattr);
 
         return genlmsg_end(msg, hdr);
 
@@ -899,17 +931,80 @@ static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
         return genlmsg_cancel(msg, hdr);
 }
 
+static int nl80211_dump_station(struct sk_buff *skb,
+                struct netlink_callback *cb)
+{
+        int wp_idx = 0;
+        int if_idx = 0;
+        int sta_idx = cb->args[2];
+        int wp_start = cb->args[0];
+        int if_start = cb->args[1];
+        struct station_info sinfo;
+        struct cfg80211_registered_device *dev;
+        struct wireless_dev *wdev;
+        u8 mac_addr[ETH_ALEN];
+        int err;
+        int exit = 0;
+
+        /* TODO: filter by device */
+        mutex_lock(&cfg80211_drv_mutex);
+        list_for_each_entry(dev, &cfg80211_drv_list, list) {
+                if (exit)
+                        break;
+                if (++wp_idx < wp_start)
+                        continue;
+                if_idx = 0;
+
+                mutex_lock(&dev->devlist_mtx);
+                list_for_each_entry(wdev, &dev->netdev_list, list) {
+                        if (exit)
+                                break;
+                        if (++if_idx < if_start)
+                                continue;
+                        if (!dev->ops->dump_station)
+                                continue;
+
+                        for (;; ++sta_idx) {
+                                rtnl_lock();
+                                err = dev->ops->dump_station(&dev->wiphy,
+                                                wdev->netdev, sta_idx, mac_addr,
+                                                &sinfo);
+                                rtnl_unlock();
+                                if (err) {
+                                        sta_idx = 0;
+                                        break;
+                                }
+                                if (nl80211_send_station(skb,
+                                                NETLINK_CB(cb->skb).pid,
+                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
+                                                wdev->netdev, mac_addr,
+                                                &sinfo) < 0) {
+                                        exit = 1;
+                                        break;
+                                }
+                        }
+                }
+                mutex_unlock(&dev->devlist_mtx);
+        }
+        mutex_unlock(&cfg80211_drv_mutex);
+
+        cb->args[0] = wp_idx;
+        cb->args[1] = if_idx;
+        cb->args[2] = sta_idx;
+
+        return skb->len;
+}
 
 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
 {
         struct cfg80211_registered_device *drv;
         int err;
         struct net_device *dev;
-        struct station_stats stats;
+        struct station_info sinfo;
         struct sk_buff *msg;
         u8 *mac_addr = NULL;
 
-        memset(&stats, 0, sizeof(stats));
+        memset(&sinfo, 0, sizeof(sinfo));
 
         if (!info->attrs[NL80211_ATTR_MAC])
                 return -EINVAL;
@@ -926,15 +1021,18 @@ static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
         }
 
         rtnl_lock();
-        err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &stats);
+        err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
         rtnl_unlock();
 
+        if (err)
+                goto out;
+
         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
         if (!msg)
                 goto out;
 
         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
-                                 dev, mac_addr, &stats) < 0)
+                                 dev, mac_addr, &sinfo) < 0)
                 goto out_free;
 
         err = genlmsg_unicast(msg, info->snd_pid);
@@ -1005,6 +1103,10 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
                                 &params.station_flags))
                 return -EINVAL;
 
+        if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
+                params.plink_action =
+                    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
+
         err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
         if (err)
                 return err;
@@ -1119,6 +1221,273 @@ static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
         return err;
 }
 
+static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
+                                int flags, struct net_device *dev,
+                                u8 *dst, u8 *next_hop,
+                                struct mpath_info *pinfo)
+{
+        void *hdr;
+        struct nlattr *pinfoattr;
+
+        hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
+        if (!hdr)
+                return -1;
+
+        NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
+        NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
+        NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
+
+        pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
+        if (!pinfoattr)
+                goto nla_put_failure;
+        if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
+                NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
+                            pinfo->frame_qlen);
+        if (pinfo->filled & MPATH_INFO_DSN)
+                NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
+                            pinfo->dsn);
+        if (pinfo->filled & MPATH_INFO_METRIC)
+                NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
+                            pinfo->metric);
+        if (pinfo->filled & MPATH_INFO_EXPTIME)
+                NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
+                            pinfo->exptime);
+        if (pinfo->filled & MPATH_INFO_FLAGS)
+                NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
+                            pinfo->flags);
+        if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
+                NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
+                            pinfo->discovery_timeout);
+        if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
+                NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
+                            pinfo->discovery_retries);
+
+        nla_nest_end(msg, pinfoattr);
+
+        return genlmsg_end(msg, hdr);
+
+ nla_put_failure:
+        return genlmsg_cancel(msg, hdr);
+}
+
+static int nl80211_dump_mpath(struct sk_buff *skb,
+                struct netlink_callback *cb)
+{
+        int wp_idx = 0;
+        int if_idx = 0;
+        int sta_idx = cb->args[2];
+        int wp_start = cb->args[0];
+        int if_start = cb->args[1];
+        struct mpath_info pinfo;
+        struct cfg80211_registered_device *dev;
+        struct wireless_dev *wdev;
+        u8 dst[ETH_ALEN];
+        u8 next_hop[ETH_ALEN];
+        int err;
+        int exit = 0;
+
+        /* TODO: filter by device */
+        mutex_lock(&cfg80211_drv_mutex);
+        list_for_each_entry(dev, &cfg80211_drv_list, list) {
+                if (exit)
+                        break;
+                if (++wp_idx < wp_start)
+                        continue;
+                if_idx = 0;
+
+                mutex_lock(&dev->devlist_mtx);
+                list_for_each_entry(wdev, &dev->netdev_list, list) {
+                        if (exit)
+                                break;
+                        if (++if_idx < if_start)
+                                continue;
+                        if (!dev->ops->dump_mpath)
+                                continue;
+
+                        for (;; ++sta_idx) {
+                                rtnl_lock();
+                                err = dev->ops->dump_mpath(&dev->wiphy,
+                                                wdev->netdev, sta_idx, dst,
+                                                next_hop, &pinfo);
+                                rtnl_unlock();
+                                if (err) {
+                                        sta_idx = 0;
+                                        break;
+                                }
+                                if (nl80211_send_mpath(skb,
+                                                NETLINK_CB(cb->skb).pid,
+                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
+                                                wdev->netdev, dst, next_hop,
+                                                &pinfo) < 0) {
+                                        exit = 1;
+                                        break;
+                                }
+                        }
+                }
+                mutex_unlock(&dev->devlist_mtx);
+        }
+        mutex_unlock(&cfg80211_drv_mutex);
+
+        cb->args[0] = wp_idx;
+        cb->args[1] = if_idx;
+        cb->args[2] = sta_idx;
+
+        return skb->len;
+}
+
+static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
+{
+        struct cfg80211_registered_device *drv;
+        int err;
+        struct net_device *dev;
+        struct mpath_info pinfo;
+        struct sk_buff *msg;
+        u8 *dst = NULL;
+        u8 next_hop[ETH_ALEN];
+
+        memset(&pinfo, 0, sizeof(pinfo));
+
+        if (!info->attrs[NL80211_ATTR_MAC])
+                return -EINVAL;
+
+        dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
+
+        err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+        if (err)
+                return err;
+
+        if (!drv->ops->get_mpath) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
+        rtnl_lock();
+        err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
+        rtnl_unlock();
+
+        if (err)
+                goto out;
+
+        msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+        if (!msg)
+                goto out;
+
+        if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
+                                 dev, dst, next_hop, &pinfo) < 0)
+                goto out_free;
+
+        err = genlmsg_unicast(msg, info->snd_pid);
+        goto out;
+
+ out_free:
+        nlmsg_free(msg);
+
+ out:
+        cfg80211_put_dev(drv);
+        dev_put(dev);
+        return err;
+}
+
+static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
+{
+        struct cfg80211_registered_device *drv;
+        int err;
+        struct net_device *dev;
+        u8 *dst = NULL;
+        u8 *next_hop = NULL;
+
+        if (!info->attrs[NL80211_ATTR_MAC])
+                return -EINVAL;
+
+        if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
+                return -EINVAL;
+
+        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);
+        if (err)
+                return err;
+
+        if (!drv->ops->change_mpath) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
+        rtnl_lock();
+        err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
+        rtnl_unlock();
+
+ out:
+        cfg80211_put_dev(drv);
+        dev_put(dev);
+        return err;
+}
+static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
+{
+        struct cfg80211_registered_device *drv;
+        int err;
+        struct net_device *dev;
+        u8 *dst = NULL;
+        u8 *next_hop = NULL;
+
+        if (!info->attrs[NL80211_ATTR_MAC])
+                return -EINVAL;
+
+        if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
+                return -EINVAL;
+
+        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);
+        if (err)
+                return err;
+
+        if (!drv->ops->add_mpath) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
+        rtnl_lock();
+        err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
+        rtnl_unlock();
+
+ out:
+        cfg80211_put_dev(drv);
+        dev_put(dev);
+        return err;
+}
+
+static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
+{
+        struct cfg80211_registered_device *drv;
+        int err;
+        struct net_device *dev;
+        u8 *dst = NULL;
+
+        if (info->attrs[NL80211_ATTR_MAC])
+                dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
+
+        err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+        if (err)
+                return err;
+
+        if (!drv->ops->del_mpath) {
+                err = -EOPNOTSUPP;
+                goto out;
+        }
+
+        rtnl_lock();
+        err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
+        rtnl_unlock();
+
+ out:
+        cfg80211_put_dev(drv);
+        dev_put(dev);
+        return err;
+}
+
 static struct genl_ops nl80211_ops[] = {
         {
                 .cmd = NL80211_CMD_GET_WIPHY,
@@ -1203,7 +1572,7 @@ static struct genl_ops nl80211_ops[] = {
         {
                 .cmd = NL80211_CMD_GET_STATION,
                 .doit = nl80211_get_station,
-                /* TODO: implement dumpit */
+                .dumpit = nl80211_dump_station,
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
         },
@@ -1225,6 +1594,31 @@ static struct genl_ops nl80211_ops[] = {
                 .policy = nl80211_policy,
                 .flags = GENL_ADMIN_PERM,
         },
+        {
+                .cmd = NL80211_CMD_GET_MPATH,
+                .doit = nl80211_get_mpath,
+                .dumpit = nl80211_dump_mpath,
+                .policy = nl80211_policy,
+                .flags = GENL_ADMIN_PERM,
+        },
+        {
+                .cmd = NL80211_CMD_SET_MPATH,
+                .doit = nl80211_set_mpath,
+                .policy = nl80211_policy,
+                .flags = GENL_ADMIN_PERM,
+        },
+        {
+                .cmd = NL80211_CMD_NEW_MPATH,
+                .doit = nl80211_new_mpath,
+                .policy = nl80211_policy,
+                .flags = GENL_ADMIN_PERM,
+        },
+        {
+                .cmd = NL80211_CMD_DEL_MPATH,
+                .doit = nl80211_del_mpath,
+                .policy = nl80211_policy,
+                .flags = GENL_ADMIN_PERM,
+        },
 };
 
 /* multicast groups */