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-rw-r--r--include/uapi/linux/nl80211.h4
-rw-r--r--net/wireless/nl80211.c11
-rw-r--r--net/wireless/reg.c80
-rw-r--r--net/wireless/reg.h6
4 files changed, 81 insertions, 20 deletions
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 95832ce03a44..f882fe1f9709 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -990,6 +990,8 @@
* &NL80211_CMD_CONNECT or &NL80211_CMD_ROAM. If the 4 way handshake failed
* &NL80211_CMD_DISCONNECT should be indicated instead.
*
+ * @NL80211_CMD_RELOAD_REGDB: Request that the regdb firmware file is reloaded.
+ *
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@@ -1194,6 +1196,8 @@ enum nl80211_commands {
NL80211_CMD_PORT_AUTHORIZED,
+ NL80211_CMD_RELOAD_REGDB,
+
/* 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 5129342151e6..67a03f2885a4 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5678,6 +5678,11 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
}
}
+static int nl80211_reload_regdb(struct sk_buff *skb, struct genl_info *info)
+{
+ return reg_reload_regdb();
+}
+
static int nl80211_get_mesh_config(struct sk_buff *skb,
struct genl_info *info)
{
@@ -12709,6 +12714,12 @@ static const struct genl_ops nl80211_ops[] = {
.flags = GENL_ADMIN_PERM,
},
{
+ .cmd = NL80211_CMD_RELOAD_REGDB,
+ .doit = nl80211_reload_regdb,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
.cmd = NL80211_CMD_GET_MESH_CONFIG,
.doit = nl80211_get_mesh_config,
.policy = nl80211_policy,
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index e9aeb05aaf3e..180addda52af 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -781,6 +781,8 @@ static int query_regdb(const char *alpha2)
const struct fwdb_header *hdr = regdb;
const struct fwdb_country *country;
+ ASSERT_RTNL();
+
if (IS_ERR(regdb))
return PTR_ERR(regdb);
@@ -796,41 +798,47 @@ static int query_regdb(const char *alpha2)
static void regdb_fw_cb(const struct firmware *fw, void *context)
{
+ int set_error = 0;
+ bool restore = true;
void *db;
if (!fw) {
pr_info("failed to load regulatory.db\n");
- regdb = ERR_PTR(-ENODATA);
- goto restore;
- }
-
- if (!valid_regdb(fw->data, fw->size)) {
+ set_error = -ENODATA;
+ } else if (!valid_regdb(fw->data, fw->size)) {
pr_info("loaded regulatory.db is malformed\n");
- release_firmware(fw);
- regdb = ERR_PTR(-EINVAL);
- goto restore;
+ set_error = -EINVAL;
}
- db = kmemdup(fw->data, fw->size, GFP_KERNEL);
- release_firmware(fw);
+ rtnl_lock();
+ if (WARN_ON(regdb && !IS_ERR(regdb))) {
+ /* just restore and free new db */
+ } else if (set_error) {
+ regdb = ERR_PTR(set_error);
+ } else if (fw) {
+ db = kmemdup(fw->data, fw->size, GFP_KERNEL);
+ if (db) {
+ regdb = db;
+ restore = context && query_regdb(context);
+ } else {
+ restore = true;
+ }
+ }
- if (!db)
- goto restore;
- regdb = db;
+ if (restore)
+ restore_regulatory_settings(true);
- if (query_regdb(context))
- goto restore;
- goto free;
- restore:
- rtnl_lock();
- restore_regulatory_settings(true);
rtnl_unlock();
- free:
+
kfree(context);
+
+ release_firmware(fw);
}
static int query_regdb_file(const char *alpha2)
{
+ ASSERT_RTNL();
+
if (regdb)
return query_regdb(alpha2);
@@ -843,6 +851,38 @@ static int query_regdb_file(const char *alpha2)
(void *)alpha2, regdb_fw_cb);
}
+int reg_reload_regdb(void)
+{
+ const struct firmware *fw;
+ void *db;
+ int err;
+
+ err = request_firmware(&fw, "regulatory.db", &reg_pdev->dev);
+ if (err)
+ return err;
+
+ if (!valid_regdb(fw->data, fw->size)) {
+ err = -ENODATA;
+ goto out;
+ }
+
+ db = kmemdup(fw->data, fw->size, GFP_KERNEL);
+ if (!db) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ rtnl_lock();
+ if (!IS_ERR_OR_NULL(regdb))
+ kfree(regdb);
+ regdb = db;
+ rtnl_unlock();
+
+ out:
+ release_firmware(fw);
+ return err;
+}
+
static bool reg_query_database(struct regulatory_request *request)
{
/* query internal regulatory database (if it exists) */
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index ca7fedf2e7a1..9529c522611a 100644
--- a/net/wireless/reg.h
+++ b/net/wireless/reg.h
@@ -179,4 +179,10 @@ void regulatory_propagate_dfs_state(struct wiphy *wiphy,
* @wiphy2 - wiphy it's dfs_region to be checked against that of wiphy1
*/
bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2);
+
+/**
+ * reg_reload_regdb - reload the regulatory.db firmware file
+ */
+int reg_reload_regdb(void);
+
#endif /* __NET_WIRELESS_REG_H */