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Commit bd90fdcc authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

nl80211: refactor mesh parameter parsing 



I'm going to need this in a new place later.

Tested-by: default avatarJavier Cardona <javier@cozybit.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent f9e10ce4

net/wireless/nl80211.c

+38 −23
Original line number Diff line number Diff line
@@ -2613,14 +2613,6 @@ static int nl80211_get_mesh_params(struct sk_buff *skb, 
	return -ENOBUFS;

}



#define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \

do {\

	if (table[attr_num]) {\

		cfg.param = nla_fn(table[attr_num]); \

		mask |= (1 << (attr_num - 1)); \

	} \

} while (0);\



static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {

	[NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },

	[NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
@@ -2639,31 +2631,34 @@ static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_A 
	[NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },

};



static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)

static int nl80211_parse_mesh_params(struct genl_info *info,

				     struct mesh_config *cfg,

				     u32 *mask_out)

{

	u32 mask;

	struct cfg80211_registered_device *rdev = info->user_ptr[0];

	struct net_device *dev = info->user_ptr[1];

	struct mesh_config cfg;

	struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];

	struct nlattr *parent_attr;

	u32 mask = 0;



	parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];

	if (!parent_attr)

#define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \

do {\

	if (table[attr_num]) {\

		cfg->param = nla_fn(table[attr_num]); \

		mask |= (1 << (attr_num - 1)); \

	} \

} while (0);\





	if (!info->attrs[NL80211_ATTR_MESH_PARAMS])

		return -EINVAL;

	if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,

			parent_attr, nl80211_meshconf_params_policy))

			     info->attrs[NL80211_ATTR_MESH_PARAMS],

			     nl80211_meshconf_params_policy))

		return -EINVAL;



	if (!rdev->ops->set_mesh_params)

		return -EOPNOTSUPP;



	/* This makes sure that there aren't more than 32 mesh config

	 * parameters (otherwise our bitfield scheme would not work.) */

	BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);



	/* Fill in the params struct */

	mask = 0;

	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,

			mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);

	FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
@@ -2703,12 +2698,32 @@ static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info) 
			NL80211_MESHCONF_HWMP_ROOTMODE,

			nla_get_u8);



	if (mask_out)

		*mask_out = mask;

	return 0;



#undef FILL_IN_MESH_PARAM_IF_SET

}



static int nl80211_set_mesh_params(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 mesh_config cfg;

	u32 mask;

	int err;



	if (!rdev->ops->set_mesh_params)

		return -EOPNOTSUPP;



	err = nl80211_parse_mesh_params(info, &cfg, &mask);

	if (err)

		return err;



	/* Apply changes */

	return rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);

}



#undef FILL_IN_MESH_PARAM_IF_SET



static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)

{

	struct sk_buff *msg;