Introduce NL80211_CMD_OFFCHAN_CHAIN command in order to configure
offchannel chain if supported by the underlay driver.
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
include/uapi/linux/nl80211.h | 6 ++++++
net/wireless/nl80211.c | 41 ++++++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+)
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index c2efea98e060..51ddd6f198d4 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1200,6 +1200,10 @@
* @NL80211_CMD_COLOR_CHANGE_COMPLETED: Notify userland that the color change
* has completed
*
+ * @NL80211_CMD_OFFCHAN_CHAIN: Configure dedicated chain available for radar
+ * detection on some hw. The driver is supposed to implement CAC
+ * management in sw or fw.
+ *
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@@ -1440,6 +1444,8 @@ enum nl80211_commands {
NL80211_CMD_COLOR_CHANGE_ABORTED,
NL80211_CMD_COLOR_CHANGE_COMPLETED,
+ NL80211_CMD_OFFCHAN_CHAIN,
+
/* 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 bf7cd4752547..7c0902d35635 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -9064,6 +9064,39 @@ static int nl80211_stop_sched_scan(struct sk_buff *skb,
return cfg80211_stop_sched_scan_req(rdev, req, false);
}
+static int nl80211_set_offchan_chain(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ enum nl80211_dfs_regions dfs_region;
+ struct wiphy *wiphy = &rdev->wiphy;
+ struct cfg80211_chan_def chandef;
+ int err;
+
+ dfs_region = reg_get_dfs_region(wiphy);
+ if (dfs_region == NL80211_DFS_UNSET)
+ return -EINVAL;
+
+ err = nl80211_parse_chandef(rdev, info, &chandef);
+ if (err)
+ return err;
+
+ err = cfg80211_chandef_dfs_required(wiphy, &chandef, NL80211_IFTYPE_AP);
+ if (err < 0)
+ return err;
+
+ if (!err)
+ return -EINVAL;
+
+ if (!cfg80211_chandef_dfs_usable(wiphy, &chandef))
+ return -EINVAL;
+
+ if (!rdev->ops->set_offchan_chain)
+ return -EOPNOTSUPP;
+
+ return rdev_set_offchan_chain(rdev, &chandef);
+}
+
static int nl80211_start_radar_detection(struct sk_buff *skb,
struct genl_info *info)
{
@@ -15907,6 +15940,14 @@ static const struct genl_small_ops nl80211_small_ops[] = {
.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
NL80211_FLAG_NEED_RTNL,
},
+ {
+ .cmd = NL80211_CMD_OFFCHAN_CHAIN,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = nl80211_set_offchan_chain,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .internal_flags = NL80211_FLAG_NEED_WIPHY |
+ NL80211_FLAG_NEED_RTNL,
+ },
};
static struct genl_family nl80211_fam __ro_after_init = {
--
2.31.1
