Commit be3d4810 authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville

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: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent d2372b31
......@@ -131,11 +131,13 @@ are expected to do this during initialization.
r = zd_reg2alpha2(mac->regdomain, alpha2);
if (!r)
regulatory_hint(hw->wiphy, alpha2, NULL);
regulatory_hint(hw->wiphy, alpha2);
Example code - drivers providing a built in regulatory domain:
--------------------------------------------------------------
[NOTE: This API is not currently available, it can be added when required]
If you have regulatory information you can obtain from your
driver and you *need* to use this we let you build a regulatory domain
structure and pass it to the wireless core. To do this you should
......@@ -182,6 +184,7 @@ Then in some part of your code after your wiphy has been registered:
memcpy(rd, &mydriver_jp_regdom, sizeof(struct ieee80211_regdomain));
for (i=0; i < num_rules; i++)
memcpy(&rd->reg_rules[i], &mydriver_jp_regdom.reg_rules[i],
sizeof(struct ieee80211_reg_rule));
return regulatory_hint(hw->wiphy, NULL, rd);
memcpy(&rd->reg_rules[i],
&mydriver_jp_regdom.reg_rules[i],
sizeof(struct ieee80211_reg_rule));
regulatory_struct_hint(rd);
......@@ -171,7 +171,7 @@ int zd_mac_init_hw(struct ieee80211_hw *hw)
r = zd_reg2alpha2(mac->regdomain, alpha2);
if (!r)
regulatory_hint(hw->wiphy, alpha2, NULL);
regulatory_hint(hw->wiphy, alpha2);
r = 0;
disable_int:
......
......@@ -342,34 +342,19 @@ ieee80211_get_channel(struct wiphy *wiphy, int freq)
/**
* regulatory_hint - driver hint to the wireless core a regulatory domain
* @wiphy: the driver's very own &struct wiphy
* @wiphy: the wireless device giving the hint (used only for reporting
* conflicts)
* @alpha2: the ISO/IEC 3166 alpha2 the driver claims its regulatory domain
* should be in. If @rd is set this should be NULL. Note that if you
* set this to NULL you should still set rd->alpha2 to some accepted
* alpha2.
* @rd: a complete regulatory domain provided by the driver. If passed
* the driver does not need to worry about freeing it.
*
* Wireless drivers can use this function to hint to the wireless core
* what it believes should be the current regulatory domain by
* giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
* domain should be in or by providing a completely build regulatory domain.
* If the driver provides an ISO/IEC 3166 alpha2 userspace will be queried
* for a regulatory domain structure for the respective country. If
* a regulatory domain is build and passed you should set the alpha2
* if possible, otherwise set it to the special value of "99" which tells
* the wireless core it is unknown.
*
* Returns -EALREADY if *a regulatory domain* has already been set. Note that
* this could be by another driver. It is safe for drivers to continue if
* -EALREADY is returned, if drivers are not capable of world roaming they
* should not register more channels than they support. Right now we only
* support listening to the first driver hint. If the driver is capable
* of world roaming but wants to respect its own EEPROM mappings for
* specific regulatory domains it should register the @reg_notifier callback
* on the &struct wiphy. Returns 0 if the hint went through fine or through an
* intersection operation. Otherwise a standard error code is returned.
* for a regulatory domain structure for the respective country.
*/
extern int regulatory_hint(struct wiphy *wiphy,
const char *alpha2, struct ieee80211_regdomain *rd);
extern void regulatory_hint(struct wiphy *wiphy, const char *alpha2);
#endif /* __NET_WIRELESS_H */
......@@ -1695,7 +1695,7 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
#endif
mutex_lock(&cfg80211_drv_mutex);
r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data, NULL);
r = __regulatory_hint(NULL, REGDOM_SET_BY_USER, data);
mutex_unlock(&cfg80211_drv_mutex);
return r;
}
......
......@@ -42,7 +42,10 @@
#include "core.h"
#include "reg.h"
/* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */
/*
* wiphy is set if this request's initiator is
* REGDOM_SET_BY_COUNTRY_IE or _DRIVER
*/
struct regulatory_request {
struct wiphy *wiphy;
enum reg_set_by initiator;
......@@ -298,7 +301,7 @@ static int call_crda(const char *alpha2)
/* This has the logic which determines when a new request
* should be ignored. */
static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
char *alpha2, struct ieee80211_regdomain *rd)
const char *alpha2)
{
/* All initial requests are respected */
if (!last_request)
......@@ -343,22 +346,8 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by,
return 1;
case REGDOM_SET_BY_DRIVER:
BUG_ON(!wiphy);
if (last_request->initiator == REGDOM_SET_BY_DRIVER) {
/* Two separate drivers hinting different things,
* this is possible if you have two devices present
* on a system with different EEPROM regulatory
* readings. XXX: Do intersection, we support only
* the first regulatory hint for now */
if (last_request->wiphy != wiphy)
return -EALREADY;
if (rd)
return -EALREADY;
/* Driver should not be trying to hint different
* regulatory domains! */
BUG_ON(!alpha2_equal(alpha2,
cfg80211_regdomain->alpha2));
if (last_request->initiator == REGDOM_SET_BY_DRIVER)
return -EALREADY;
}
if (last_request->initiator == REGDOM_SET_BY_CORE)
return 0;
/* XXX: Handle intersection, and add the
......@@ -557,40 +546,32 @@ void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby)
/* Caller must hold &cfg80211_drv_mutex */
int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
const char *alpha2, struct ieee80211_regdomain *rd)
const char *alpha2)
{
struct regulatory_request *request;
char *rd_alpha2;
int r = 0;
r = ignore_request(wiphy, set_by, (char *) alpha2, rd);
r = ignore_request(wiphy, set_by, alpha2);
if (r)
return r;
if (rd)
rd_alpha2 = rd->alpha2;
else
rd_alpha2 = (char *) alpha2;
switch (set_by) {
case REGDOM_SET_BY_CORE:
case REGDOM_SET_BY_COUNTRY_IE:
case REGDOM_SET_BY_DRIVER:
case REGDOM_SET_BY_USER:
request = kzalloc(sizeof(struct regulatory_request),
GFP_KERNEL);
GFP_KERNEL);
if (!request)
return -ENOMEM;
request->alpha2[0] = rd_alpha2[0];
request->alpha2[1] = rd_alpha2[1];
request->alpha2[0] = alpha2[0];
request->alpha2[1] = alpha2[1];
request->initiator = set_by;
request->wiphy = wiphy;
kfree(last_request);
last_request = request;
if (rd)
break;
r = call_crda(alpha2);
#ifndef CONFIG_WIRELESS_OLD_REGULATORY
if (r)
......@@ -605,25 +586,13 @@ int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
return r;
}
int regulatory_hint(struct wiphy *wiphy, const char *alpha2,
struct ieee80211_regdomain *rd)
void regulatory_hint(struct wiphy *wiphy, const char *alpha2)
{
int r;
BUG_ON(!rd && !alpha2);
BUG_ON(!alpha2);
mutex_lock(&cfg80211_drv_mutex);
r = __regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2, rd);
if (r || !rd)
goto unlock_and_exit;
/* If the driver passed a regulatory domain we skipped asking
* userspace for one so we can now go ahead and set it */
r = set_regdom(rd);
unlock_and_exit:
__regulatory_hint(wiphy, REGDOM_SET_BY_DRIVER, alpha2);
mutex_unlock(&cfg80211_drv_mutex);
return r;
}
EXPORT_SYMBOL(regulatory_hint);
......@@ -792,11 +761,11 @@ int regulatory_init(void)
* that is not a valid ISO / IEC 3166 alpha2 */
if (ieee80211_regdom[0] != 'E' || ieee80211_regdom[1] != 'U')
err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE,
ieee80211_regdom, NULL);
ieee80211_regdom);
#else
cfg80211_regdomain = cfg80211_world_regdom;
err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL);
err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00");
if (err)
printk(KERN_ERR "cfg80211: calling CRDA failed - "
"unable to update world regulatory domain, "
......
......@@ -11,30 +11,21 @@ int set_regdom(const struct ieee80211_regdomain *rd);
/**
* __regulatory_hint - hint to the wireless core a regulatory domain
* @wiphy: if a driver is providing the hint this is the driver's very
* own &struct wiphy
* @wiphy: if the hint comes from country information from an AP, this
* is required to be set to the wiphy that received the information
* @alpha2: the ISO/IEC 3166 alpha2 being claimed the regulatory domain
* should be in. If @rd is set this should be NULL
* @rd: a complete regulatory domain, if passed the caller need not worry
* about freeing it
* should be in.
*
* The Wireless subsystem can use this function to hint to the wireless core
* what it believes should be the current regulatory domain by
* giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
* domain should be in or by providing a completely build regulatory domain.
* domain should be in.
*
* Returns -EALREADY if *a regulatory domain* has already been set. Note that
* this could be by another driver. It is safe for drivers to continue if
* -EALREADY is returned, if drivers are not capable of world roaming they
* should not register more channels than they support. Right now we only
* support listening to the first driver hint. If the driver is capable
* of world roaming but wants to respect its own EEPROM mappings for
* specific regulatory domains it should register the @reg_notifier callback
* on the &struct wiphy. Returns 0 if the hint went through fine or through an
* intersection operation. Otherwise a standard error code is returned.
* Returns zero if all went fine, %-EALREADY if a regulatory domain had
* already been set or other standard error codes.
*
*/
extern int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
const char *alpha2, struct ieee80211_regdomain *rd);
const char *alpha2);
#endif /* __NET_WIRELESS_REG_H */
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