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cfg80211: add helper fn for single rule channels

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As a preparation to handle adjacent rule channels,
factor out handling channels located in a single
regulatory rule.

Signed-off-by: Markus Theil <markus.theil@tu-ilmenau.de>
Link: https://lore.kernel.org/r/20200803144353.305538-1-markus.theil@tu-ilmenau.de
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Markus Theil 2020-08-03 16:43:52 +02:00 committed by Johannes Berg
parent c8b8280230
commit 7c9ff7e232
1 changed files with 59 additions and 47 deletions
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106
net/wireless/reg.c
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@ -1691,57 +1691,18 @@ static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd
return bw_flags;
}
/*
* Note that right now we assume the desired channel bandwidth
* is always 20 MHz for each individual channel (HT40 uses 20 MHz
* per channel, the primary and the extension channel).
*/
static void handle_channel(struct wiphy *wiphy,
enum nl80211_reg_initiator initiator,
struct ieee80211_channel *chan)
static void handle_channel_single_rule(struct wiphy *wiphy,
enum nl80211_reg_initiator initiator,
struct ieee80211_channel *chan,
u32 flags,
struct regulatory_request *lr,
struct wiphy *request_wiphy,
const struct ieee80211_reg_rule *reg_rule)
{
u32 flags, bw_flags = 0;
const struct ieee80211_reg_rule *reg_rule = NULL;
u32 bw_flags = 0;
const struct ieee80211_power_rule *power_rule = NULL;
struct wiphy *request_wiphy = NULL;
struct regulatory_request *lr = get_last_request();
const struct ieee80211_regdomain *regd;
request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
flags = chan->orig_flags;
reg_rule = freq_reg_info(wiphy, ieee80211_channel_to_khz(chan));
if (IS_ERR(reg_rule)) {
/*
* We will disable all channels that do not match our
* received regulatory rule unless the hint is coming
* from a Country IE and the Country IE had no information
* about a band. The IEEE 802.11 spec allows for an AP
* to send only a subset of the regulatory rules allowed,
* so an AP in the US that only supports 2.4 GHz may only send
* a country IE with information for the 2.4 GHz band
* while 5 GHz is still supported.
*/
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
PTR_ERR(reg_rule) == -ERANGE)
return;
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
request_wiphy && request_wiphy == wiphy &&
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
pr_debug("Disabling freq %d.%03d MHz for good\n",
chan->center_freq, chan->freq_offset);
chan->orig_flags |= IEEE80211_CHAN_DISABLED;
chan->flags = chan->orig_flags;
} else {
pr_debug("Disabling freq %d.%03d MHz\n",
chan->center_freq, chan->freq_offset);
chan->flags |= IEEE80211_CHAN_DISABLED;
}
return;
}
regd = reg_get_regdomain(wiphy);
power_rule = &reg_rule->power_rule;
@ -1803,6 +1764,57 @@ static void handle_channel(struct wiphy *wiphy,
chan->max_power = chan->max_reg_power;
}
/* Note that right now we assume the desired channel bandwidth
* is always 20 MHz for each individual channel (HT40 uses 20 MHz
* per channel, the primary and the extension channel).
*/
static void handle_channel(struct wiphy *wiphy,
enum nl80211_reg_initiator initiator,
struct ieee80211_channel *chan)
{
u32 flags = 0;
const struct ieee80211_reg_rule *reg_rule = NULL;
struct wiphy *request_wiphy = NULL;
struct regulatory_request *lr = get_last_request();
request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
flags = chan->orig_flags;
reg_rule = freq_reg_info(wiphy, ieee80211_channel_to_khz(chan));
if (IS_ERR(reg_rule)) {
/* We will disable all channels that do not match our
* received regulatory rule unless the hint is coming
* from a Country IE and the Country IE had no information
* about a band. The IEEE 802.11 spec allows for an AP
* to send only a subset of the regulatory rules allowed,
* so an AP in the US that only supports 2.4 GHz may only send
* a country IE with information for the 2.4 GHz band
* while 5 GHz is still supported.
*/
if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
PTR_ERR(reg_rule) == -ERANGE)
return;
if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
request_wiphy && request_wiphy == wiphy &&
request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
pr_debug("Disabling freq %d.%03d MHz for good\n",
chan->center_freq, chan->freq_offset);
chan->orig_flags |= IEEE80211_CHAN_DISABLED;
chan->flags = chan->orig_flags;
} else {
pr_debug("Disabling freq %d.%03d MHz\n",
chan->center_freq, chan->freq_offset);
chan->flags |= IEEE80211_CHAN_DISABLED;
}
return;
}
handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
request_wiphy, reg_rule);
}
static void handle_band(struct wiphy *wiphy,
enum nl80211_reg_initiator initiator,
struct ieee80211_supported_band *sband)