From be3d48106c1e5d075784e5e67928a6b5ffc0f3b6 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 24 Oct 2008 20:32:21 +0200 Subject: [PATCH] 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 Signed-off-by: John W. Linville --- Documentation/networking/regulatory.txt | 11 +++-- drivers/net/wireless/zd1211rw/zd_mac.c | 2 +- include/net/wireless.h | 23 ++------- net/wireless/nl80211.c | 2 +- net/wireless/reg.c | 63 +++++++------------------ net/wireless/reg.h | 23 +++------ 6 files changed, 36 insertions(+), 88 deletions(-) diff --git a/Documentation/networking/regulatory.txt b/Documentation/networking/regulatory.txt index 357d4ba4f135..dcf31648414a 100644 --- a/Documentation/networking/regulatory.txt +++ b/Documentation/networking/regulatory.txt @@ -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); diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c index 2f0802b29c4b..07513e48b8f2 100644 --- a/drivers/net/wireless/zd1211rw/zd_mac.c +++ b/drivers/net/wireless/zd1211rw/zd_mac.c @@ -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: diff --git a/include/net/wireless.h b/include/net/wireless.h index 6e3ea0159045..41294c5f6f8f 100644 --- a/include/net/wireless.h +++ b/include/net/wireless.h @@ -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 */ diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index f82cc9aa6908..5e1d658a8b5a 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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; } diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 038f8f133c54..dc10071deaaa 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -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, " diff --git a/net/wireless/reg.h b/net/wireless/reg.h index 0c1572b92fef..c9b6b6358bbe 100644 --- a/net/wireless/reg.h +++ b/net/wireless/reg.h @@ -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 */ -- 2.20.1