ieee820154: add max csma backoffs setting support
This patch add support for max csma backoffs setting via nl802154
framework.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index d1cf302..af38355 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -642,6 +642,31 @@
return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be);
}
+static int
+nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg802154_registered_device *rdev = info->user_ptr[0];
+ struct net_device *dev = info->user_ptr[1];
+ struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
+ u8 max_csma_backoffs;
+
+ /* conflict here while other running iface settings */
+ if (netif_running(dev))
+ return -EBUSY;
+
+ if (!info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS])
+ return -EINVAL;
+
+ max_csma_backoffs = nla_get_u8(
+ info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]);
+
+ /* check 802.15.4 constraints */
+ if (max_csma_backoffs > 5)
+ return -EINVAL;
+
+ return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs);
+}
+
#define NL802154_FLAG_NEED_WPAN_PHY 0x01
#define NL802154_FLAG_NEED_NETDEV 0x02
#define NL802154_FLAG_NEED_RTNL 0x04
@@ -784,6 +809,14 @@
.internal_flags = NL802154_FLAG_NEED_NETDEV |
NL802154_FLAG_NEED_RTNL,
},
+ {
+ .cmd = NL802154_CMD_SET_MAX_CSMA_BACKOFFS,
+ .doit = nl802154_set_max_csma_backoffs,
+ .policy = nl802154_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = NL802154_FLAG_NEED_NETDEV |
+ NL802154_FLAG_NEED_RTNL,
+ },
};
/* initialisation/exit functions */