From: Jonathan Doron <jond@xxxxxxxxxx>
Allow usermode to query wiphy-specific regd info, for drivers that use
wiphy-specific regulatory management.
Use the existing API for sending regdomain info to usermode, but return
the wiphy-specific regd in case wiphy index is provided and the driver
employs wiphy-specific management. This implies user and kernel-mode
support for the feature and is backward compatible.
Signed-off-by: Jonathan Doron <jonathanx.doron@xxxxxxxxx>
Signed-off-by: Arik Nemtsov <arikx.nemtsov@xxxxxxxxx>
---
include/uapi/linux/nl80211.h | 6 +++++
net/wireless/nl80211.c | 54 +++++++++++++++++++++++++++++++++++---------
net/wireless/reg.c | 2 +-
net/wireless/reg.h | 1 +
4 files changed, 51 insertions(+), 12 deletions(-)
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index f050dcb..9c996bc 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1674,6 +1674,10 @@ enum nl80211_commands {
* @NL80211_ATTR_SMPS_MODE: SMPS mode to use (ap mode). see
* &enum nl80211_smps_mode.
*
+ * @NL80211_ATTR_WIPHY_SELF_MANAGED_REG: flag attribute indicating the
+ * regulatory information came from the driver and not from the global
+ * cfg80211 regulatory domain information.
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -2026,6 +2030,8 @@ enum nl80211_attrs {
NL80211_ATTR_SMPS_MODE,
+ NL80211_ATTR_WIPHY_SELF_MANAGED_REG,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 3a422e6..f1f632c 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -395,6 +395,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
[NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
[NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
[NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
+ [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
};
/* policy for the key attributes */
@@ -5287,14 +5288,24 @@ static int nl80211_update_mesh_config(struct sk_buff *skb,
static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
{
- const struct ieee80211_regdomain *regdom;
+ const struct ieee80211_regdomain *regdom = NULL;
+ struct cfg80211_registered_device *rdev;
struct sk_buff *msg;
void *hdr = NULL;
struct nlattr *nl_reg_rules;
unsigned int i;
- if (!cfg80211_regdomain)
- return -EINVAL;
+ if (info->attrs[NL80211_ATTR_WIPHY] != NULL) {
+ struct wiphy *wiphy;
+
+ rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
+ if (IS_ERR(rdev))
+ return PTR_ERR(rdev);
+
+ wiphy = &rdev->wiphy;
+ if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
+ regdom = get_wiphy_regdom(wiphy);
+ }
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
@@ -5305,13 +5316,27 @@ static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
if (!hdr)
goto put_failure;
- if (reg_last_request_cell_base() &&
- nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
- NL80211_USER_REG_HINT_CELL_BASE))
- goto nla_put_failure;
+ if (!regdom) {
+ if (!cfg80211_regdomain) {
+ nlmsg_free(msg);
+ return -EINVAL;
+ }
+
+ if (reg_last_request_cell_base() &&
+ nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
+ NL80211_USER_REG_HINT_CELL_BASE))
+ goto nla_put_failure;
+ } else {
+ if (nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
+ goto nla_put_failure;
+ if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
+ goto nla_put_failure;
+ }
rcu_read_lock();
- regdom = rcu_dereference(cfg80211_regdomain);
+
+ if (regdom == NULL)
+ regdom = rcu_dereference(cfg80211_regdomain);
if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
(regdom->dfs_region &&
@@ -10687,9 +10712,16 @@ static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
goto nla_put_failure;
}
- if (request->wiphy_idx != WIPHY_IDX_INVALID &&
- nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
- goto nla_put_failure;
+ if (request->wiphy_idx != WIPHY_IDX_INVALID) {
+ struct wiphy *wiphy;
+
+ wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
+ if ((wiphy != NULL) &&
+ nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx) &&
+ (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
+ (nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG)))
+ goto nla_put_failure;
+ }
return true;
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 4ee282d..a5f32d5 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -142,7 +142,7 @@ static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
return rtnl_dereference(cfg80211_regdomain);
}
-static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
+const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
{
return rtnl_dereference(wiphy->regd);
}
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index 5e48031..4b45d6e 100644
--- a/net/wireless/reg.h
+++ b/net/wireless/reg.h
@@ -38,6 +38,7 @@ unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
const struct ieee80211_reg_rule *rule);
bool reg_last_request_cell_base(void);
+const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy);
/**
* regulatory_hint_found_beacon - hints a beacon was found on a channel
--
1.9.1
--
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