From: Johannes Berg <johannes.berg@xxxxxxxxx>
There aren't any channel width restrictions in the
2.4 GHz band (except the natural ones by the (sub)band
boundaries), nor do default restrictions in the 5 GHz
band make sense when limited to passive scan/no IBSS
etc.
Allow passing NL80211_NO_REG_BANDWIDTH_LIMIT as the
max_bandwidth_khz and make that mean no restrictions.
Use it for the default world roaming regdomain.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
include/net/regulatory.h | 5 ++-
include/uapi/linux/nl80211.h | 4 ++-
net/wireless/reg.c | 77 +++++++++++++++++++++++---------------------
3 files changed, 48 insertions(+), 38 deletions(-)
diff --git a/include/net/regulatory.h b/include/net/regulatory.h
index 7dcaa27..9414a8f 100644
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -118,7 +118,10 @@ struct ieee80211_regdomain {
{ \
.freq_range.start_freq_khz = MHZ_TO_KHZ(start), \
.freq_range.end_freq_khz = MHZ_TO_KHZ(end), \
- .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \
+ .freq_range.max_bandwidth_khz = \
+ (bw) == NL80211_NO_REG_BANDWIDTH_LIMIT ?\
+ NL80211_NO_REG_BANDWIDTH_LIMIT :\
+ MHZ_TO_KHZ(bw), \
.power_rule.max_antenna_gain = DBI_TO_MBI(gain),\
.power_rule.max_eirp = DBM_TO_MBM(eirp), \
.flags = reg_flags, \
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 5470171..331cfb3 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2070,7 +2070,7 @@ enum nl80211_reg_type {
* in KHz. This is not a center a frequency but an actual regulatory
* band edge.
* @NL80211_ATTR_FREQ_RANGE_MAX_BW: maximum allowed bandwidth for this
- * frequency range, in KHz.
+ * frequency range, in KHz, or %NL80211_NO_REG_BANDWIDTH_LIMIT.
* @NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN: the maximum allowed antenna gain
* for a given frequency range. The value is in mBi (100 * dBi).
* If you don't have one then don't send this.
@@ -2096,6 +2096,8 @@ enum nl80211_reg_rule_attr {
NL80211_REG_RULE_ATTR_MAX = __NL80211_REG_RULE_ATTR_AFTER_LAST - 1
};
+#define NL80211_NO_REG_BANDWIDTH_LIMIT 0xffffffff
+
/**
* enum nl80211_sched_scan_match_attr - scheduled scan match attributes
* @__NL80211_SCHED_SCAN_MATCH_ATTR_INVALID: attribute number 0 is reserved
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 4e0ccad..5deb60c 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -146,29 +146,29 @@ static const struct ieee80211_regdomain world_regdom = {
.alpha2 = "00",
.reg_rules = {
/* IEEE 802.11b/g, channels 1..11 */
- REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
- /* IEEE 802.11b/g, channels 12..13. No HT40
- * channel fits here. */
- REG_RULE(2467-10, 2472+10, 20, 6, 20,
- NL80211_RRF_PASSIVE_SCAN |
- NL80211_RRF_NO_IBSS),
+ REG_RULE(2412-10, 2462+10, NL80211_NO_REG_BANDWIDTH_LIMIT,
+ 6, 20, 0),
+ /* IEEE 802.11b/g, channels 12..13. */
+ REG_RULE(2467-10, 2472+10, NL80211_NO_REG_BANDWIDTH_LIMIT,
+ 6, 20, NL80211_RRF_PASSIVE_SCAN |
+ NL80211_RRF_NO_IBSS),
/* IEEE 802.11 channel 14 - Only JP enables
* this and for 802.11b only */
- REG_RULE(2484-10, 2484+10, 20, 6, 20,
- NL80211_RRF_PASSIVE_SCAN |
- NL80211_RRF_NO_IBSS |
- NL80211_RRF_NO_OFDM),
+ REG_RULE(2484-10, 2484+10, NL80211_NO_REG_BANDWIDTH_LIMIT,
+ 6, 20, NL80211_RRF_PASSIVE_SCAN |
+ NL80211_RRF_NO_IBSS |
+ NL80211_RRF_NO_OFDM),
/* IEEE 802.11a, channel 36..48 */
- REG_RULE(5180-10, 5240+10, 40, 6, 20,
- NL80211_RRF_PASSIVE_SCAN |
- NL80211_RRF_NO_IBSS),
+ REG_RULE(5180-10, 5240+10, NL80211_NO_REG_BANDWIDTH_LIMIT,
+ 6, 20, NL80211_RRF_PASSIVE_SCAN |
+ NL80211_RRF_NO_IBSS),
/* NB: 5260 MHz - 5700 MHz requies DFS */
/* IEEE 802.11a, channel 149..165 */
- REG_RULE(5745-10, 5825+10, 40, 6, 20,
- NL80211_RRF_PASSIVE_SCAN |
- NL80211_RRF_NO_IBSS),
+ REG_RULE(5745-10, 5825+10, NL80211_NO_REG_BANDWIDTH_LIMIT,
+ 6, 20, NL80211_RRF_PASSIVE_SCAN |
+ NL80211_RRF_NO_IBSS),
/* IEEE 802.11ad (60gHz), channels 1..3 */
REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
@@ -453,8 +453,13 @@ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
- if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
- freq_range->max_bandwidth_khz > freq_diff)
+ if (freq_range->end_freq_khz <= freq_range->start_freq_khz)
+ return false;
+
+ if (freq_range->max_bandwidth_khz == NL80211_NO_REG_BANDWIDTH_LIMIT)
+ return true;
+
+ if (freq_range->max_bandwidth_khz > freq_diff)
return false;
return true;
@@ -559,7 +564,8 @@ static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1,
freq_range2->max_bandwidth_khz);
freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
- if (freq_range->max_bandwidth_khz > freq_diff)
+ if (freq_range->max_bandwidth_khz != NL80211_NO_REG_BANDWIDTH_LIMIT &&
+ freq_range->max_bandwidth_khz > freq_diff)
freq_range->max_bandwidth_khz = freq_diff;
power_rule->max_eirp = min(power_rule1->max_eirp,
@@ -789,7 +795,7 @@ static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
chan->center_freq);
- REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n",
+ REG_DBG_PRINT("%d KHz - %d KHz @ %u KHz), (%s mBi, %d mBm)\n",
freq_range->start_freq_khz, freq_range->end_freq_khz,
freq_range->max_bandwidth_khz, max_antenna_gain,
power_rule->max_eirp);
@@ -1950,27 +1956,26 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd)
pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
for (i = 0; i < rd->n_reg_rules; i++) {
+ char bandwidth[20] = "";
+ char max_ag[20] = "N/A";
+
reg_rule = &rd->reg_rules[i];
freq_range = ®_rule->freq_range;
power_rule = ®_rule->power_rule;
- /*
- * There may not be documentation for max antenna gain
- * in certain regions
- */
+ if (freq_range->max_bandwidth_khz != NL80211_NO_REG_BANDWIDTH_LIMIT)
+ snprintf(bandwidth, sizeof(bandwidth),
+ " @ %u KHz", freq_range->max_bandwidth_khz);
+
if (power_rule->max_antenna_gain)
- pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
- freq_range->start_freq_khz,
- freq_range->end_freq_khz,
- freq_range->max_bandwidth_khz,
- power_rule->max_antenna_gain,
- power_rule->max_eirp);
- else
- pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
- freq_range->start_freq_khz,
- freq_range->end_freq_khz,
- freq_range->max_bandwidth_khz,
- power_rule->max_eirp);
+ snprintf(max_ag, sizeof(max_ag),
+ "%u mBi", power_rule->max_antenna_gain);
+
+ pr_info(" (%d KHz - %d KHz%s), (%s, %d mBm)\n",
+ freq_range->start_freq_khz,
+ freq_range->end_freq_khz,
+ bandwidth, max_ag,
+ power_rule->max_eirp);
}
}
--
1.8.0
--
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