diff options
| -rw-r--r-- | include/uapi/linux/nl80211.h | 7 | ||||
| -rw-r--r-- | net/wireless/nl80211.c | 62 |
2 files changed, 69 insertions, 0 deletions
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 4625a8624ba2..31ae5c7f10e3 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -1060,6 +1060,11 @@ * the measurement completed, using the measurement cookie * (%NL80211_ATTR_COOKIE). * + * @NL80211_CMD_NOTIFY_RADAR: Notify the kernel that a radar signal was + * detected and reported by a neighboring device on the channel + * indicated by %NL80211_ATTR_WIPHY_FREQ and other attributes + * determining the width and type. + * * @NL80211_CMD_MAX: highest used command number * @__NL80211_CMD_AFTER_LAST: internal use */ @@ -1278,6 +1283,8 @@ enum nl80211_commands { NL80211_CMD_PEER_MEASUREMENT_RESULT, NL80211_CMD_PEER_MEASUREMENT_COMPLETE, + NL80211_CMD_NOTIFY_RADAR, + /* add new commands above here */ /* used to define NL80211_CMD_MAX below */ diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 4e9133e4587b..71a54ada377b 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -7990,6 +7990,60 @@ static int nl80211_start_radar_detection(struct sk_buff *skb, return err; } +static int nl80211_notify_radar_detection(struct sk_buff *skb, + struct genl_info *info) +{ + struct cfg80211_registered_device *rdev = info->user_ptr[0]; + struct net_device *dev = info->user_ptr[1]; + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_chan_def chandef; + enum nl80211_dfs_regions dfs_region; + int err; + + dfs_region = reg_get_dfs_region(wiphy); + if (dfs_region == NL80211_DFS_UNSET) { + GENL_SET_ERR_MSG(info, + "DFS Region is not set. Unexpected Radar indication"); + return -EINVAL; + } + + err = nl80211_parse_chandef(rdev, info, &chandef); + if (err) { + GENL_SET_ERR_MSG(info, "Unable to extract chandef info"); + return err; + } + + err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype); + if (err < 0) { + GENL_SET_ERR_MSG(info, "chandef is invalid"); + return err; + } + + if (err == 0) { + GENL_SET_ERR_MSG(info, + "Unexpected Radar indication for chandef/iftype"); + return -EINVAL; + } + + /* Do not process this notification if radar is already detected + * by kernel on this channel, and return success. + */ + if (chandef.chan->dfs_state == NL80211_DFS_UNAVAILABLE) + return 0; + + cfg80211_set_dfs_state(wiphy, &chandef, NL80211_DFS_UNAVAILABLE); + + cfg80211_sched_dfs_chan_update(rdev); + + memcpy(&rdev->radar_chandef, &chandef, sizeof(chandef)); + + /* Propagate this notification to other radios as well */ + queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk); + + return 0; +} + static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev = info->user_ptr[0]; @@ -14074,6 +14128,14 @@ static const struct genl_ops nl80211_ops[] = { .internal_flags = NL80211_FLAG_NEED_WDEV_UP | NL80211_FLAG_NEED_RTNL, }, + { + .cmd = NL80211_CMD_NOTIFY_RADAR, + .doit = nl80211_notify_radar_detection, + .policy = nl80211_policy, + .flags = GENL_UNS_ADMIN_PERM, + .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | + NL80211_FLAG_NEED_RTNL, + }, }; static struct genl_family nl80211_fam __ro_after_init = { |