diff options
Diffstat (limited to 'package/kernel/mac80211/patches/308-cfg80211-use-RTNL-locked-reg_can_beacon-for-IR-relax.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/308-cfg80211-use-RTNL-locked-reg_can_beacon-for-IR-relax.patch | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/308-cfg80211-use-RTNL-locked-reg_can_beacon-for-IR-relax.patch b/package/kernel/mac80211/patches/308-cfg80211-use-RTNL-locked-reg_can_beacon-for-IR-relax.patch new file mode 100644 index 0000000000..d2a1cdc418 --- /dev/null +++ b/package/kernel/mac80211/patches/308-cfg80211-use-RTNL-locked-reg_can_beacon-for-IR-relax.patch @@ -0,0 +1,216 @@ +From: Arik Nemtsov <arik@wizery.com> +Date: Wed, 8 Jul 2015 15:41:44 +0300 +Subject: [PATCH] cfg80211: use RTNL locked reg_can_beacon for IR-relaxation + +The RTNL is required to check for IR-relaxation conditions that allow +more channels to beacon. Export an RTNL locked version of reg_can_beacon +and use it where possible in AP/STA interface type flows, where +IR-relaxation may be applicable. + +Fixes: 06f207fc5418 ("cfg80211: change GO_CONCURRENT to IR_CONCURRENT for STA") +Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> +Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> +--- + +--- a/include/net/cfg80211.h ++++ b/include/net/cfg80211.h +@@ -4871,6 +4871,23 @@ bool cfg80211_reg_can_beacon(struct wiph + struct cfg80211_chan_def *chandef, + enum nl80211_iftype iftype); + ++/** ++ * cfg80211_reg_can_beacon_relax - check if beaconing is allowed with relaxation ++ * @wiphy: the wiphy ++ * @chandef: the channel definition ++ * @iftype: interface type ++ * ++ * Return: %true if there is no secondary channel or the secondary channel(s) ++ * can be used for beaconing (i.e. is not a radar channel etc.). This version ++ * also checks if IR-relaxation conditions apply, to allow beaconing under ++ * more permissive conditions. ++ * ++ * Requires the RTNL to be held. ++ */ ++bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, ++ struct cfg80211_chan_def *chandef, ++ enum nl80211_iftype iftype); ++ + /* + * cfg80211_ch_switch_notify - update wdev channel and notify userspace + * @dev: the device which switched channels +--- a/net/mac80211/tdls.c ++++ b/net/mac80211/tdls.c +@@ -69,6 +69,7 @@ ieee80211_tdls_add_subband(struct ieee80 + struct ieee80211_channel *ch; + struct cfg80211_chan_def chandef; + int i, subband_start; ++ struct wiphy *wiphy = sdata->local->hw.wiphy; + + for (i = start; i <= end; i += spacing) { + if (!ch_cnt) +@@ -79,9 +80,8 @@ ieee80211_tdls_add_subband(struct ieee80 + /* we will be active on the channel */ + cfg80211_chandef_create(&chandef, ch, + NL80211_CHAN_NO_HT); +- if (cfg80211_reg_can_beacon(sdata->local->hw.wiphy, +- &chandef, +- sdata->wdev.iftype)) { ++ if (cfg80211_reg_can_beacon_relax(wiphy, &chandef, ++ sdata->wdev.iftype)) { + ch_cnt++; + /* + * check if the next channel is also part of +--- a/net/wireless/chan.c ++++ b/net/wireless/chan.c +@@ -797,23 +797,18 @@ static bool cfg80211_ir_permissive_chan( + return false; + } + +-bool cfg80211_reg_can_beacon(struct wiphy *wiphy, +- struct cfg80211_chan_def *chandef, +- enum nl80211_iftype iftype) ++static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, ++ struct cfg80211_chan_def *chandef, ++ enum nl80211_iftype iftype, ++ bool check_no_ir) + { + bool res; + u32 prohibited_flags = IEEE80211_CHAN_DISABLED | + IEEE80211_CHAN_RADAR; + +- trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype); ++ trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); + +- /* +- * Under certain conditions suggested by some regulatory bodies a +- * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag +- * only if such relaxations are not enabled and the conditions are not +- * met. +- */ +- if (!cfg80211_ir_permissive_chan(wiphy, iftype, chandef->chan)) ++ if (check_no_ir) + prohibited_flags |= IEEE80211_CHAN_NO_IR; + + if (cfg80211_chandef_dfs_required(wiphy, chandef, iftype) > 0 && +@@ -827,8 +822,36 @@ bool cfg80211_reg_can_beacon(struct wiph + trace_cfg80211_return_bool(res); + return res; + } ++ ++bool cfg80211_reg_can_beacon(struct wiphy *wiphy, ++ struct cfg80211_chan_def *chandef, ++ enum nl80211_iftype iftype) ++{ ++ return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); ++} + EXPORT_SYMBOL(cfg80211_reg_can_beacon); + ++bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, ++ struct cfg80211_chan_def *chandef, ++ enum nl80211_iftype iftype) ++{ ++ bool check_no_ir; ++ ++ ASSERT_RTNL(); ++ ++ /* ++ * Under certain conditions suggested by some regulatory bodies a ++ * GO/STA can IR on channels marked with IEEE80211_NO_IR. Set this flag ++ * only if such relaxations are not enabled and the conditions are not ++ * met. ++ */ ++ check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, ++ chandef->chan); ++ ++ return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); ++} ++EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); ++ + int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, + struct cfg80211_chan_def *chandef) + { +--- a/net/wireless/nl80211.c ++++ b/net/wireless/nl80211.c +@@ -2007,7 +2007,8 @@ static int __nl80211_set_channel(struct + switch (iftype) { + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: +- if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef, iftype)) { ++ if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef, ++ iftype)) { + result = -EINVAL; + break; + } +@@ -3408,8 +3409,8 @@ static int nl80211_start_ap(struct sk_bu + } else if (!nl80211_get_ap_channel(rdev, ¶ms)) + return -EINVAL; + +- if (!cfg80211_reg_can_beacon(&rdev->wiphy, ¶ms.chandef, +- wdev->iftype)) ++ if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, ¶ms.chandef, ++ wdev->iftype)) + return -EINVAL; + + if (info->attrs[NL80211_ATTR_ACL_POLICY]) { +@@ -6500,8 +6501,8 @@ skip_beacons: + if (err) + return err; + +- if (!cfg80211_reg_can_beacon(&rdev->wiphy, ¶ms.chandef, +- wdev->iftype)) ++ if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, ¶ms.chandef, ++ wdev->iftype)) + return -EINVAL; + + err = cfg80211_chandef_dfs_required(wdev->wiphy, +@@ -10188,7 +10189,8 @@ static int nl80211_tdls_channel_switch(s + return -EINVAL; + + /* we will be active on the TDLS link */ +- if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef, wdev->iftype)) ++ if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef, ++ wdev->iftype)) + return -EINVAL; + + /* don't allow switching to DFS channels */ +--- a/net/wireless/reg.c ++++ b/net/wireless/reg.c +@@ -1589,7 +1589,7 @@ static bool reg_wdev_chan_valid(struct w + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: + case NL80211_IFTYPE_ADHOC: +- return cfg80211_reg_can_beacon(wiphy, &chandef, iftype); ++ return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); + case NL80211_IFTYPE_STATION: + case NL80211_IFTYPE_P2P_CLIENT: + return cfg80211_chandef_usable(wiphy, &chandef, +--- a/net/wireless/trace.h ++++ b/net/wireless/trace.h +@@ -2358,20 +2358,23 @@ TRACE_EVENT(cfg80211_cqm_rssi_notify, + + TRACE_EVENT(cfg80211_reg_can_beacon, + TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef, +- enum nl80211_iftype iftype), +- TP_ARGS(wiphy, chandef, iftype), ++ enum nl80211_iftype iftype, bool check_no_ir), ++ TP_ARGS(wiphy, chandef, iftype, check_no_ir), + TP_STRUCT__entry( + WIPHY_ENTRY + CHAN_DEF_ENTRY + __field(enum nl80211_iftype, iftype) ++ __field(bool, check_no_ir) + ), + TP_fast_assign( + WIPHY_ASSIGN; + CHAN_DEF_ASSIGN(chandef); + __entry->iftype = iftype; ++ __entry->check_no_ir = check_no_ir; + ), +- TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT ", iftype=%d", +- WIPHY_PR_ARG, CHAN_DEF_PR_ARG, __entry->iftype) ++ TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT ", iftype=%d check_no_ir=%s", ++ WIPHY_PR_ARG, CHAN_DEF_PR_ARG, __entry->iftype, ++ BOOL_TO_STR(__entry->check_no_ir)) + ); + + TRACE_EVENT(cfg80211_chandef_dfs_required, |