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wireless: remove struct regdom hinting
The code needs to be split out and cleaned up, so as a first step remove the capability, to add it back in a subsequent patch as a separate function. Also remove the publically facing return value of the function and the wiphy argument. A number of internal functions go from being generic helpers to just being used for alpha2 setting. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
John W. Linville
parent
d2372b3152
commit
be3d48106c
@ -131,11 +131,13 @@ are expected to do this during initialization.
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r = zd_reg2alpha2(mac->regdomain, alpha2);
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if (!r)
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regulatory_hint(hw->wiphy, alpha2, NULL);
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regulatory_hint(hw->wiphy, alpha2);
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Example code - drivers providing a built in regulatory domain:
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--------------------------------------------------------------
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[NOTE: This API is not currently available, it can be added when required]
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If you have regulatory information you can obtain from your
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driver and you *need* to use this we let you build a regulatory domain
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structure and pass it to the wireless core. To do this you should
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@ -182,6 +184,7 @@ Then in some part of your code after your wiphy has been registered:
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memcpy(rd, &mydriver_jp_regdom, sizeof(struct ieee80211_regdomain));
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for (i=0; i < num_rules; i++)
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memcpy(&rd->reg_rules[i], &mydriver_jp_regdom.reg_rules[i],
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sizeof(struct ieee80211_reg_rule));
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return regulatory_hint(hw->wiphy, NULL, rd);
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memcpy(&rd->reg_rules[i],
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&mydriver_jp_regdom.reg_rules[i],
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sizeof(struct ieee80211_reg_rule));
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regulatory_struct_hint(rd);
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@ -171,7 +171,7 @@ int zd_mac_init_hw(struct ieee80211_hw *hw)
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r = zd_reg2alpha2(mac->regdomain, alpha2);
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if (!r)
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regulatory_hint(hw->wiphy, alpha2, NULL);
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regulatory_hint(hw->wiphy, alpha2);
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r = 0;
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disable_int:
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@ -342,34 +342,19 @@ ieee80211_get_channel(struct wiphy *wiphy, int freq)
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/**
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* regulatory_hint - driver hint to the wireless core a regulatory domain
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* @wiphy: the driver's very own &struct wiphy
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* @wiphy: the wireless device giving the hint (used only for reporting
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* conflicts)
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* @alpha2: the ISO/IEC 3166 alpha2 the driver claims its regulatory domain
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* should be in. If @rd is set this should be NULL. Note that if you
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* set this to NULL you should still set rd->alpha2 to some accepted
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* alpha2.
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* @rd: a complete regulatory domain provided by the driver. If passed
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* the driver does not need to worry about freeing it.
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*
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* Wireless drivers can use this function to hint to the wireless core
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* what it believes should be the current regulatory domain by
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* giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
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* domain should be in or by providing a completely build regulatory domain.
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* If the driver provides an ISO/IEC 3166 alpha2 userspace will be queried
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* for a regulatory domain structure for the respective country. If
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* a regulatory domain is build and passed you should set the alpha2
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* if possible, otherwise set it to the special value of "99" which tells
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* the wireless core it is unknown.
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*
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* Returns -EALREADY if *a regulatory domain* has already been set. Note that
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* this could be by another driver. It is safe for drivers to continue if
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* -EALREADY is returned, if drivers are not capable of world roaming they
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* should not register more channels than they support. Right now we only
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* support listening to the first driver hint. If the driver is capable
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* of world roaming but wants to respect its own EEPROM mappings for
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* specific regulatory domains it should register the @reg_notifier callback
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* on the &struct wiphy. Returns 0 if the hint went through fine or through an
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* intersection operation. Otherwise a standard error code is returned.
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* for a regulatory domain structure for the respective country.
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*/
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extern int regulatory_hint(struct wiphy *wiphy,
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const char *alpha2, struct ieee80211_regdomain *rd);
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extern void regulatory_hint(struct wiphy *wiphy, const char *alpha2);
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#endif /* __NET_WIRELESS_H */
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@ -1695,7 +1695,7 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
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return -EINVAL;
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#endif
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mutex_lock(&cfg80211_drv_mutex);
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r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, NULL);
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r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data);
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mutex_unlock(&cfg80211_drv_mutex);
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return r;
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}
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@ -42,7 +42,10 @@
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#include "core.h"
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#include "reg.h"
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/* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */
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/*
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* wiphy is set if this request's initiator is
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* REGDOM_SET_BY_COUNTRY_IE or _DRIVER
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*/
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struct regulatory_request {
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struct wiphy *wiphy;
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enum reg_set_by initiator;
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@ -298,7 +301,7 @@ static int call_crda(const char *alpha2)
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/* This has the logic which determines when a new request
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* should be ignored. */
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static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
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char *alpha2, struct ieee80211_regdomain *rd)
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const char *alpha2)
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{
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/* All initial requests are respected */
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if (!last_request)
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@ -343,22 +346,8 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
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return 1;
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case REGDOM_SET_BY_DRIVER:
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BUG_ON(!wiphy);
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if (last_request->initiator == REGDOM_SET_BY_DRIVER) {
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/* Two separate drivers hinting different things,
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* this is possible if you have two devices present
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* on a system with different EEPROM regulatory
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* readings. XXX: Do intersection, we support only
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* the first regulatory hint for now */
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if (last_request->wiphy != wiphy)
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return -EALREADY;
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if (rd)
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return -EALREADY;
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/* Driver should not be trying to hint different
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* regulatory domains! */
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BUG_ON(!alpha2_equal(alpha2,
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cfg80211_regdomain->alpha2));
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if (last_request->initiator == REGDOM_SET_BY_DRIVER)
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return -EALREADY;
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}
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if (last_request->initiator == REGDOM_SET_BY_CORE)
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return 0;
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/* XXX: Handle intersection, and add the
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@ -557,40 +546,32 @@ void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby)
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/* Caller must hold &cfg80211_drv_mutex */
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int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
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const char *alpha2, struct ieee80211_regdomain *rd)
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const char *alpha2)
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{
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struct regulatory_request *request;
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char *rd_alpha2;
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int r = 0;
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r = ignore_request(wiphy, set_by, (char *) alpha2, rd);
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r = ignore_request(wiphy, set_by, alpha2);
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if (r)
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return r;
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if (rd)
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rd_alpha2 = rd->alpha2;
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else
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rd_alpha2 = (char *) alpha2;
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switch (set_by) {
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case REGDOM_SET_BY_CORE:
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case REGDOM_SET_BY_COUNTRY_IE:
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case REGDOM_SET_BY_DRIVER:
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case REGDOM_SET_BY_USER:
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request = kzalloc(sizeof(struct regulatory_request),
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GFP_KERNEL);
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GFP_KERNEL);
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if (!request)
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return -ENOMEM;
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request->alpha2[0] = rd_alpha2[0];
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request->alpha2[1] = rd_alpha2[1];
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request->alpha2[0] = alpha2[0];
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request->alpha2[1] = alpha2[1];
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request->initiator = set_by;
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request->wiphy = wiphy;
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kfree(last_request);
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last_request = request;
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if (rd)
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break;
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r = call_crda(alpha2);
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#ifndef CONFIG_WIRELESS_OLD_REGULATORY
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if (r)
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@ -605,25 +586,13 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
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return r;
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}
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int regulatory_hint(struct wiphy *wiphy, const char *alpha2,
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struct ieee80211_regdomain *rd)
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void regulatory_hint(struct wiphy *wiphy, const char *alpha2)
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{
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int r;
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BUG_ON(!rd && !alpha2);
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BUG_ON(!alpha2);
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mutex_lock(&cfg80211_drv_mutex);
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r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, rd);
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if (r || !rd)
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goto unlock_and_exit;
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/* If the driver passed a regulatory domain we skipped asking
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* userspace for one so we can now go ahead and set it */
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r = set_regdom(rd);
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unlock_and_exit:
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__regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2);
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mutex_unlock(&cfg80211_drv_mutex);
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return r;
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}
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EXPORT_SYMBOL(regulatory_hint);
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@ -792,11 +761,11 @@ int regulatory_init(void)
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* that is not a valid ISO / IEC 3166 alpha2 */
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if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U')
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err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE,
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ieee80211_regdom, NULL);
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ieee80211_regdom);
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#else
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cfg80211_regdomain = cfg80211_world_regdom;
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err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL);
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err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00");
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if (err)
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printk(KERN_ERR "cfg80211: calling CRDA failed - "
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"unable to update world regulatory domain, "
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@ -11,30 +11,21 @@ int set_regdom(const struct ieee80211_regdomain *rd);
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/**
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* __regulatory_hint - hint to the wireless core a regulatory domain
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* @wiphy: if a driver is providing the hint this is the driver's very
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* own &struct wiphy
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* @wiphy: if the hint comes from country information from an AP, this
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* is required to be set to the wiphy that received the information
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* @alpha2: the ISO/IEC 3166 alpha2 being claimed the regulatory domain
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* should be in. If @rd is set this should be NULL
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* @rd: a complete regulatory domain, if passed the caller need not worry
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* about freeing it
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* should be in.
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*
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* The Wireless subsystem can use this function to hint to the wireless core
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* what it believes should be the current regulatory domain by
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* giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
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* domain should be in or by providing a completely build regulatory domain.
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* domain should be in.
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*
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* Returns -EALREADY if *a regulatory domain* has already been set. Note that
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* this could be by another driver. It is safe for drivers to continue if
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* -EALREADY is returned, if drivers are not capable of world roaming they
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* should not register more channels than they support. Right now we only
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* support listening to the first driver hint. If the driver is capable
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* of world roaming but wants to respect its own EEPROM mappings for
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* specific regulatory domains it should register the @reg_notifier callback
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* on the &struct wiphy. Returns 0 if the hint went through fine or through an
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* intersection operation. Otherwise a standard error code is returned.
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* Returns zero if all went fine, %-EALREADY if a regulatory domain had
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* already been set or other standard error codes.
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*
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*/
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extern int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
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const char *alpha2, struct ieee80211_regdomain *rd);
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const char *alpha2);
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#endif /* __NET_WIRELESS_REG_H */
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