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cfg80211: clean up regulatory mess

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The recent code from Luis is an #ifdef hell and contains lots of
code that's stuffed into the wrong file making a whole bunch of
things needlessly non-static, and besides, what is it doing in
core.c??

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2008-09-15 10:56:48 +02:00 committed by John W. Linville
parent 762af43bda
commit 734366deae
3 changed files with 203 additions and 230 deletions
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144
net/wireless/core.c
View file

@ -29,107 +29,6 @@ MODULE_AUTHOR("Johannes Berg");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("wireless configuration support");
struct list_head regulatory_requests;
/* Central wireless core regulatory domains, we only need two,
* the current one and a world regulatory domain in case we have no
* information to give us an alpha2 */
struct ieee80211_regdomain *cfg80211_regdomain;
/* We keep a static world regulatory domain in case of the absence of CRDA */
const struct ieee80211_regdomain world_regdom = {
.n_reg_rules = 1,
.alpha2 = "00",
.reg_rules = {
REG_RULE(2412-10, 2462+10, 40, 6, 20,
NL80211_RRF_PASSIVE_SCAN |
NL80211_RRF_NO_IBSS),
}
};
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
/* All this fucking static junk will be removed soon, so
* don't fucking count on it !@#$ */
static char *ieee80211_regdom = "US";
module_param(ieee80211_regdom, charp, 0444);
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
/* We assume 40 MHz bandwidth for the old regulatory work.
* We make emphasis we are using the exact same frequencies
* as before */
const struct ieee80211_regdomain us_regdom = {
.n_reg_rules = 6,
.alpha2 = "US",
.reg_rules = {
/* IEEE 802.11b/g, channels 1..11 */
REG_RULE(2412-10, 2462+10, 40, 6, 27, 0),
/* IEEE 802.11a, channel 36 */
REG_RULE(5180-10, 5180+10, 40, 6, 23, 0),
/* IEEE 802.11a, channel 40 */
REG_RULE(5200-10, 5200+10, 40, 6, 23, 0),
/* IEEE 802.11a, channel 44 */
REG_RULE(5220-10, 5220+10, 40, 6, 23, 0),
/* IEEE 802.11a, channels 48..64 */
REG_RULE(5240-10, 5320+10, 40, 6, 23, 0),
/* IEEE 802.11a, channels 149..165, outdoor */
REG_RULE(5745-10, 5825+10, 40, 6, 30, 0),
}
};
const struct ieee80211_regdomain jp_regdom = {
.n_reg_rules = 3,
.alpha2 = "JP",
.reg_rules = {
/* IEEE 802.11b/g, channels 1..14 */
REG_RULE(2412-10, 2484+10, 40, 6, 20, 0),
/* IEEE 802.11a, channels 34..48 */
REG_RULE(5170-10, 5240+10, 40, 6, 20,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channels 52..64 */
REG_RULE(5260-10, 5320+10, 40, 6, 20,
NL80211_RRF_NO_IBSS |
NL80211_RRF_DFS),
}
};
const struct ieee80211_regdomain eu_regdom = {
.n_reg_rules = 6,
/* This alpha2 is bogus, we leave it here just for stupid
* backward compatibility */
.alpha2 = "EU",
.reg_rules = {
/* IEEE 802.11b/g, channels 1..13 */
REG_RULE(2412-10, 2472+10, 40, 6, 20, 0),
/* IEEE 802.11a, channel 36 */
REG_RULE(5180-10, 5180+10, 40, 6, 23,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channel 40 */
REG_RULE(5200-10, 5200+10, 40, 6, 23,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channel 44 */
REG_RULE(5220-10, 5220+10, 40, 6, 23,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channels 48..64 */
REG_RULE(5240-10, 5320+10, 40, 6, 20,
NL80211_RRF_NO_IBSS |
NL80211_RRF_DFS),
/* IEEE 802.11a, channels 100..140 */
REG_RULE(5500-10, 5700+10, 40, 6, 30,
NL80211_RRF_NO_IBSS |
NL80211_RRF_DFS),
}
};
#endif
struct ieee80211_regdomain *cfg80211_world_regdom =
(struct ieee80211_regdomain *) &world_regdom;
LIST_HEAD(regulatory_requests);
DEFINE_MUTEX(cfg80211_reg_mutex);
/* RCU might be appropriate here since we usually
* only read the list, and that can happen quite
* often because we need to do it for each command */
@ -514,34 +413,10 @@ static struct notifier_block cfg80211_netdev_notifier = {
.notifier_call = cfg80211_netdev_notifier_call,
};
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
const struct ieee80211_regdomain *static_regdom(char *alpha2)
{
if (alpha2[0] == 'U' && alpha2[1] == 'S')
return &us_regdom;
if (alpha2[0] == 'J' && alpha2[1] == 'P')
return &jp_regdom;
if (alpha2[0] == 'E' && alpha2[1] == 'U')
return &eu_regdom;
/* Default, as per the old rules */
return &us_regdom;
}
#endif
static int cfg80211_init(void)
{
int err;
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
cfg80211_regdomain =
(struct ieee80211_regdomain *) static_regdom(ieee80211_regdom);
/* Used during reset_regdomains_static() */
cfg80211_world_regdom = cfg80211_regdomain;
#else
cfg80211_regdomain =
(struct ieee80211_regdomain *) cfg80211_world_regdom;
#endif
err = wiphy_sysfs_init();
if (err)
goto out_fail_sysfs;
@ -560,25 +435,6 @@ static int cfg80211_init(void)
if (err)
goto out_fail_reg;
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
printk(KERN_INFO "cfg80211: Using old static regulatory domain:\n");
print_regdomain_info(cfg80211_regdomain);
/* The old code still requests for a new regdomain and if
* you have CRDA you get it updated, otherwise you get
* stuck with the static values. We ignore "EU" code as
* 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);
#else
err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL);
if (err)
printk(KERN_ERR "cfg80211: calling CRDA failed - "
"unable to update world regulatory domain, "
"using static definition\n");
#endif
return 0;
out_fail_reg:

254
net/wireless/reg.c
View file

@ -42,6 +42,18 @@
#include "core.h"
#include "reg.h"
/* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */
struct regulatory_request {
struct list_head list;
struct wiphy *wiphy;
int granted;
enum reg_set_by initiator;
char alpha2[2];
};
static LIST_HEAD(regulatory_requests);
DEFINE_MUTEX(cfg80211_reg_mutex);
/* To trigger userspace events */
static struct platform_device *reg_pdev;
@ -51,6 +63,161 @@ static u32 supported_bandwidths[] = {
MHZ_TO_KHZ(20),
};
static struct list_head regulatory_requests;
/* Central wireless core regulatory domains, we only need two,
* the current one and a world regulatory domain in case we have no
* information to give us an alpha2 */
static struct ieee80211_regdomain *cfg80211_regdomain;
/* We keep a static world regulatory domain in case of the absence of CRDA */
static const struct ieee80211_regdomain world_regdom = {
.n_reg_rules = 1,
.alpha2 = "00",
.reg_rules = {
REG_RULE(2412-10, 2462+10, 40, 6, 20,
NL80211_RRF_PASSIVE_SCAN |
NL80211_RRF_NO_IBSS),
}
};
static struct ieee80211_regdomain *cfg80211_world_regdom =
(struct ieee80211_regdomain *) &world_regdom;
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
static char *ieee80211_regdom = "US";
module_param(ieee80211_regdom, charp, 0444);
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
/* We assume 40 MHz bandwidth for the old regulatory work.
* We make emphasis we are using the exact same frequencies
* as before */
static const struct ieee80211_regdomain us_regdom = {
.n_reg_rules = 6,
.alpha2 = "US",
.reg_rules = {
/* IEEE 802.11b/g, channels 1..11 */
REG_RULE(2412-10, 2462+10, 40, 6, 27, 0),
/* IEEE 802.11a, channel 36 */
REG_RULE(5180-10, 5180+10, 40, 6, 23, 0),
/* IEEE 802.11a, channel 40 */
REG_RULE(5200-10, 5200+10, 40, 6, 23, 0),
/* IEEE 802.11a, channel 44 */
REG_RULE(5220-10, 5220+10, 40, 6, 23, 0),
/* IEEE 802.11a, channels 48..64 */
REG_RULE(5240-10, 5320+10, 40, 6, 23, 0),
/* IEEE 802.11a, channels 149..165, outdoor */
REG_RULE(5745-10, 5825+10, 40, 6, 30, 0),
}
};
static const struct ieee80211_regdomain jp_regdom = {
.n_reg_rules = 3,
.alpha2 = "JP",
.reg_rules = {
/* IEEE 802.11b/g, channels 1..14 */
REG_RULE(2412-10, 2484+10, 40, 6, 20, 0),
/* IEEE 802.11a, channels 34..48 */
REG_RULE(5170-10, 5240+10, 40, 6, 20,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channels 52..64 */
REG_RULE(5260-10, 5320+10, 40, 6, 20,
NL80211_RRF_NO_IBSS |
NL80211_RRF_DFS),
}
};
static const struct ieee80211_regdomain eu_regdom = {
.n_reg_rules = 6,
/* This alpha2 is bogus, we leave it here just for stupid
* backward compatibility */
.alpha2 = "EU",
.reg_rules = {
/* IEEE 802.11b/g, channels 1..13 */
REG_RULE(2412-10, 2472+10, 40, 6, 20, 0),
/* IEEE 802.11a, channel 36 */
REG_RULE(5180-10, 5180+10, 40, 6, 23,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channel 40 */
REG_RULE(5200-10, 5200+10, 40, 6, 23,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channel 44 */
REG_RULE(5220-10, 5220+10, 40, 6, 23,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channels 48..64 */
REG_RULE(5240-10, 5320+10, 40, 6, 20,
NL80211_RRF_NO_IBSS |
NL80211_RRF_DFS),
/* IEEE 802.11a, channels 100..140 */
REG_RULE(5500-10, 5700+10, 40, 6, 30,
NL80211_RRF_NO_IBSS |
NL80211_RRF_DFS),
}
};
static const struct ieee80211_regdomain *static_regdom(char *alpha2)
{
if (alpha2[0] == 'U' && alpha2[1] == 'S')
return &us_regdom;
if (alpha2[0] == 'J' && alpha2[1] == 'P')
return &jp_regdom;
if (alpha2[0] == 'E' && alpha2[1] == 'U')
return &eu_regdom;
/* Default, as per the old rules */
return &us_regdom;
}
static bool is_old_static_regdom(struct ieee80211_regdomain *rd)
{
if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom)
return true;
return false;
}
/* The old crap never deals with a world regulatory domain, it only
* deals with the static regulatory domain passed and if possible
* an updated "US" or "JP" regulatory domain. We do however store the
* old static regulatory domain in cfg80211_world_regdom for convenience
* of use here */
static void reset_regdomains_static(void)
{
if (!is_old_static_regdom(cfg80211_regdomain))
kfree(cfg80211_regdomain);
/* This is setting the regdom to the old static regdom */
cfg80211_regdomain =
(struct ieee80211_regdomain *) cfg80211_world_regdom;
}
#else
static void reset_regdomains(void)
{
if (cfg80211_world_regdom && cfg80211_world_regdom != &world_regdom) {
if (cfg80211_world_regdom == cfg80211_regdomain) {
kfree(cfg80211_regdomain);
} else {
kfree(cfg80211_world_regdom);
kfree(cfg80211_regdomain);
}
} else if (cfg80211_regdomain && cfg80211_regdomain != &world_regdom)
kfree(cfg80211_regdomain);
cfg80211_world_regdom = (struct ieee80211_regdomain *) &world_regdom;
cfg80211_regdomain = NULL;
}
/* Dynamic world regulatory domain requested by the wireless
* core upon initialization */
static void update_world_regdomain(struct ieee80211_regdomain *rd)
{
BUG_ON(list_empty(&regulatory_requests));
reset_regdomains();
cfg80211_world_regdom = rd;
cfg80211_regdomain = rd;
}
#endif
bool is_world_regdom(char *alpha2)
{
if (!alpha2)
@ -555,58 +722,6 @@ void print_regdomain_info(struct ieee80211_regdomain *rd)
print_rd_rules(rd);
}
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
static bool is_old_static_regdom(struct ieee80211_regdomain *rd)
{
if (rd == &us_regdom || rd == &jp_regdom || rd == &eu_regdom)
return true;
return false;
}
/* The old crap never deals with a world regulatory domain, it only
* deals with the static regulatory domain passed and if possible
* an updated "US" or "JP" regulatory domain. We do however store the
* old static regulatory domain in cfg80211_world_regdom for convenience
* of use here */
static void reset_regdomains_static(void)
{
if (!is_old_static_regdom(cfg80211_regdomain))
kfree(cfg80211_regdomain);
/* This is setting the regdom to the old static regdom */
cfg80211_regdomain =
(struct ieee80211_regdomain *) cfg80211_world_regdom;
}
#else
static void reset_regdomains(void)
{
if (cfg80211_world_regdom && cfg80211_world_regdom != &world_regdom) {
if (cfg80211_world_regdom == cfg80211_regdomain) {
kfree(cfg80211_regdomain);
} else {
kfree(cfg80211_world_regdom);
kfree(cfg80211_regdomain);
}
} else if (cfg80211_regdomain && cfg80211_regdomain != &world_regdom)
kfree(cfg80211_regdomain);
cfg80211_world_regdom = (struct ieee80211_regdomain *) &world_regdom;
cfg80211_regdomain = NULL;
}
/* Dynamic world regulatory domain requested by the wireless
* core upon initialization */
static void update_world_regdomain(struct ieee80211_regdomain *rd)
{
BUG_ON(list_empty(&regulatory_requests));
reset_regdomains();
cfg80211_world_regdom = rd;
cfg80211_regdomain = rd;
}
#endif
static int __set_regdom(struct ieee80211_regdomain *rd)
{
struct regulatory_request *request = NULL;
@ -615,7 +730,7 @@ static int __set_regdom(struct ieee80211_regdomain *rd)
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
/* We ignore the world regdom with the old static regdomains setup
* as there is no point to it with satic regulatory definitions :(
* as there is no point to it with static regulatory definitions :(
* Don't worry this shit will be removed soon... */
if (is_world_regdom(rd->alpha2))
return -EINVAL;
@ -735,25 +850,58 @@ int set_regdom(struct ieee80211_regdomain *rd)
int regulatory_init(void)
{
int err;
reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
if (IS_ERR(reg_pdev))
return PTR_ERR(reg_pdev);
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
cfg80211_regdomain =
(struct ieee80211_regdomain *) static_regdom(ieee80211_regdom);
/* Used during reset_regdomains_static() */
cfg80211_world_regdom = cfg80211_regdomain;
printk(KERN_INFO "cfg80211: Using old static regulatory domain:\n");
print_regdomain_info(cfg80211_regdomain);
/* The old code still requests for a new regdomain and if
* you have CRDA you get it updated, otherwise you get
* stuck with the static values. We ignore "EU" code as
* 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);
#else
cfg80211_regdomain =
(struct ieee80211_regdomain *) cfg80211_world_regdom;
err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL);
if (err)
printk(KERN_ERR "cfg80211: calling CRDA failed - "
"unable to update world regulatory domain, "
"using static definition\n");
#endif
return 0;
}
void regulatory_exit(void)
{
struct regulatory_request *req, *req_tmp;
mutex_lock(&cfg80211_drv_mutex);
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
reset_regdomains_static();
#else
reset_regdomains();
#endif
list_for_each_entry_safe(req, req_tmp, &regulatory_requests, list) {
list_del(&req->list);
kfree(req);
}
platform_device_unregister(reg_pdev);
mutex_unlock(&cfg80211_drv_mutex);
}

35
net/wireless/reg.h
View file

@ -1,44 +1,13 @@
#ifndef __NET_WIRELESS_REG_H
#define __NET_WIRELESS_REG_H
extern const struct ieee80211_regdomain world_regdom;
#ifdef CONFIG_WIRELESS_OLD_REGULATORY
extern const struct ieee80211_regdomain us_regdom;
extern const struct ieee80211_regdomain jp_regdom;
extern const struct ieee80211_regdomain eu_regdom;
#endif
extern struct ieee80211_regdomain *cfg80211_regdomain;
extern struct ieee80211_regdomain *cfg80211_world_regdom;
extern struct list_head regulatory_requests;
struct regdom_last_setby {
struct wiphy *wiphy;
u8 initiator;
};
/* wiphy is set if this request's initiator is REGDOM_SET_BY_DRIVER */
struct regulatory_request {
struct list_head list;
struct wiphy *wiphy;
int granted;
enum reg_set_by initiator;
char alpha2[2];
};
extern struct mutex cfg80211_reg_mutex;
bool is_world_regdom(char *alpha2);
bool reg_is_valid_request(char *alpha2);
int set_regdom(struct ieee80211_regdomain *rd);
int __regulatory_hint_alpha2(struct wiphy *wiphy, enum reg_set_by set_by,
const char *alpha2);
int regulatory_init(void);
void regulatory_exit(void);
void print_regdomain_info(struct ieee80211_regdomain *);
/* If a char is A-Z */
#define IS_ALPHA(letter) (letter >= 65 && letter <= 90)
int set_regdom(struct ieee80211_regdomain *rd);
#endif /* __NET_WIRELESS_REG_H */