From 75ea719cb4773b05cc48e741feb4e267522b9656 Mon Sep 17 00:00:00 2001 From: Bob Copeland Date: Thu, 3 Jan 2013 00:09:46 -0500 Subject: mac80211: fix mesh_hwmp kerneldoc One of the function names was wrong and some parameters were missing. Signed-off-by: Bob Copeland Signed-off-by: Johannes Berg diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c index 47aeee2..9044296 100644 --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -219,12 +219,14 @@ static void prepare_frame_for_deferred_tx(struct ieee80211_sub_if_data *sdata, } /** - * mesh_send_path error - Sends a PERR mesh management frame + * mesh_path_error_tx - Sends a PERR mesh management frame * + * @ttl: allowed remaining hops * @target: broken destination * @target_sn: SN of the broken destination * @target_rcode: reason code for this PERR * @ra: node this frame is addressed to + * @sdata: local mesh subif * * Note: This function may be called with driver locks taken that the driver * also acquires in the TX path. To avoid a deadlock we don't transmit the @@ -350,6 +352,7 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local, * @sdata: local mesh subif * @mgmt: mesh management frame * @hwmp_ie: hwmp information element (PREP or PREQ) + * @action: type of hwmp ie * * This function updates the path routing information to the originator and the * transmitter of a HWMP PREQ or PREP frame. -- cgit v0.10.2 From 45034bfb8c9ecc62db40b438bea7fe728ac8facf Mon Sep 17 00:00:00 2001 From: Thomas Pedersen Date: Wed, 2 Jan 2013 14:55:16 -0800 Subject: mac80211_hwsim: fix tsf adjustment Make hwsim TSF offset adjustments cumulative and relative to the fake PHY TSF. Now adding 1000us, then adding -1000us doesn't result in a tsf_offset of -1000. Also the beacon timestamp can now correctly be expressed as (tsf + data->tsf_offset), which will be done in a later patch. Signed-off-by: Thomas Pedersen Signed-off-by: Johannes Berg diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index d248a4c..807d713 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -361,7 +361,7 @@ struct mac80211_hwsim_data { int power_level; /* difference between this hw's clock and the real clock, in usecs */ - u64 tsf_offset; + s64 tsf_offset; }; @@ -427,9 +427,10 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u64 tsf) { struct mac80211_hwsim_data *data = hw->priv; - struct timeval tv = ktime_to_timeval(ktime_get_real()); - u64 now = tv.tv_sec * USEC_PER_SEC + tv.tv_usec; - data->tsf_offset = tsf - now; + u64 now = mac80211_hwsim_get_tsf(hw, vif); + s64 delta = tsf - now; + + data->tsf_offset += delta; } static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw, -- cgit v0.10.2 From 01e59e467ecf976c782eecd4dc99644802cc60e2 Mon Sep 17 00:00:00 2001 From: Thomas Pedersen Date: Wed, 2 Jan 2013 14:55:17 -0800 Subject: mac80211_hwsim: hrtimer beacon For testing various timing-sensitive protocols (power save, MBCA, etc.), a beacon accuracy of jiffies is not sufficient. A tasklet_hrtimer is used for the beacon since it runs the callback in soft-IRQ context with hrtimer resolution. Also handle BSS_CHANGED_BEACON_ENABLED for hwsim. Signed-off-by: Thomas Pedersen [simplify timer container_of] Signed-off-by: Johannes Berg diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index 807d713..c54c5d1 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -337,11 +337,11 @@ struct mac80211_hwsim_data { int scan_chan_idx; struct ieee80211_channel *channel; - unsigned long beacon_int; /* in jiffies unit */ + u64 beacon_int /* beacon interval in us */; unsigned int rx_filter; bool started, idle, scanning; struct mutex mutex; - struct timer_list beacon_timer; + struct tasklet_hrtimer beacon_timer; enum ps_mode { PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL } ps; @@ -917,7 +917,7 @@ static void mac80211_hwsim_stop(struct ieee80211_hw *hw) { struct mac80211_hwsim_data *data = hw->priv; data->started = false; - del_timer(&data->beacon_timer); + tasklet_hrtimer_cancel(&data->beacon_timer); wiphy_debug(hw->wiphy, "%s\n", __func__); } @@ -1001,21 +1001,28 @@ static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac, rcu_dereference(vif->chanctx_conf)->def.chan); } - -static void mac80211_hwsim_beacon(unsigned long arg) +static enum hrtimer_restart +mac80211_hwsim_beacon(struct hrtimer *timer) { - struct ieee80211_hw *hw = (struct ieee80211_hw *) arg; - struct mac80211_hwsim_data *data = hw->priv; + struct mac80211_hwsim_data *data = + container_of(timer, struct mac80211_hwsim_data, + beacon_timer.timer); + struct ieee80211_hw *hw = data->hw; + u64 bcn_int = data->beacon_int; + ktime_t next_bcn; if (!data->started) - return; + goto out; ieee80211_iterate_active_interfaces_atomic( hw, IEEE80211_IFACE_ITER_NORMAL, mac80211_hwsim_beacon_tx, hw); - data->beacon_timer.expires = jiffies + data->beacon_int; - add_timer(&data->beacon_timer); + next_bcn = ktime_add(hrtimer_get_expires(timer), + ns_to_ktime(bcn_int * 1000)); + tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS); +out: + return HRTIMER_NORESTART; } static const char *hwsim_chantypes[] = { @@ -1053,9 +1060,12 @@ static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed) data->power_level = conf->power_level; if (!data->started || !data->beacon_int) - del_timer(&data->beacon_timer); - else - mod_timer(&data->beacon_timer, jiffies + data->beacon_int); + tasklet_hrtimer_cancel(&data->beacon_timer); + else if (!hrtimer_is_queued(&data->beacon_timer.timer)) { + tasklet_hrtimer_start(&data->beacon_timer, + ns_to_ktime(data->beacon_int * 1000), + HRTIMER_MODE_REL); + } return 0; } @@ -1105,12 +1115,22 @@ static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw, if (changed & BSS_CHANGED_BEACON_INT) { wiphy_debug(hw->wiphy, " BCNINT: %d\n", info->beacon_int); - data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000; - if (WARN_ON(!data->beacon_int)) - data->beacon_int = 1; - if (data->started) - mod_timer(&data->beacon_timer, - jiffies + data->beacon_int); + data->beacon_int = info->beacon_int * 1024; + } + + if (changed & BSS_CHANGED_BEACON_ENABLED) { + wiphy_debug(hw->wiphy, " BCN EN: %d\n", info->enable_beacon); + if (data->started && + !hrtimer_is_queued(&data->beacon_timer.timer) && + info->enable_beacon) { + if (WARN_ON(!data->beacon_int)) + data->beacon_int = 1000 * 1024; + tasklet_hrtimer_start(&data->beacon_timer, + ns_to_ktime(data->beacon_int * + 1000), + HRTIMER_MODE_REL); + } else if (!info->enable_beacon) + tasklet_hrtimer_cancel(&data->beacon_timer); } if (changed & BSS_CHANGED_ERP_CTS_PROT) { @@ -2393,8 +2413,9 @@ static int __init init_mac80211_hwsim(void) data->debugfs, data, &hwsim_fops_group); - setup_timer(&data->beacon_timer, mac80211_hwsim_beacon, - (unsigned long) hw); + tasklet_hrtimer_init(&data->beacon_timer, + mac80211_hwsim_beacon, + CLOCK_REALTIME, HRTIMER_MODE_ABS); list_add_tail(&data->list, &hwsim_radios); } -- cgit v0.10.2 From c51f878379b1d0677619798b1d9358d053bdbdb1 Mon Sep 17 00:00:00 2001 From: Thomas Pedersen Date: Wed, 2 Jan 2013 14:55:18 -0800 Subject: mac80211_hwsim: fix beacon timing A beacon period starts at TSF time 0. Spoof this by rounding the starting beacon time to a multiple of the beacon interval, and keep TBTT aligned on TSF adjustment. Signed-off-by: Thomas Pedersen Signed-off-by: Johannes Berg diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index c54c5d1..b6e2caa 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -362,6 +362,7 @@ struct mac80211_hwsim_data { /* difference between this hw's clock and the real clock, in usecs */ s64 tsf_offset; + s64 bcn_delta; }; @@ -428,9 +429,12 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw, { struct mac80211_hwsim_data *data = hw->priv; u64 now = mac80211_hwsim_get_tsf(hw, vif); + u32 bcn_int = data->beacon_int; s64 delta = tsf - now; data->tsf_offset += delta; + /* adjust after beaconing with new timestamp at old TBTT */ + data->bcn_delta = do_div(delta, bcn_int); } static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw, @@ -1018,6 +1022,12 @@ mac80211_hwsim_beacon(struct hrtimer *timer) hw, IEEE80211_IFACE_ITER_NORMAL, mac80211_hwsim_beacon_tx, hw); + /* beacon at new TBTT + beacon interval */ + if (data->bcn_delta) { + bcn_int -= data->bcn_delta; + data->bcn_delta = 0; + } + next_bcn = ktime_add(hrtimer_get_expires(timer), ns_to_ktime(bcn_int * 1000)); tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS); @@ -1062,8 +1072,12 @@ static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed) if (!data->started || !data->beacon_int) tasklet_hrtimer_cancel(&data->beacon_timer); else if (!hrtimer_is_queued(&data->beacon_timer.timer)) { + u64 tsf = mac80211_hwsim_get_tsf(hw, NULL); + u32 bcn_int = data->beacon_int; + u64 until_tbtt = bcn_int - do_div(tsf, bcn_int); + tasklet_hrtimer_start(&data->beacon_timer, - ns_to_ktime(data->beacon_int * 1000), + ns_to_ktime(until_tbtt * 1000), HRTIMER_MODE_REL); } @@ -1123,11 +1137,15 @@ static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw, if (data->started && !hrtimer_is_queued(&data->beacon_timer.timer) && info->enable_beacon) { + u64 tsf, until_tbtt; + u32 bcn_int; if (WARN_ON(!data->beacon_int)) data->beacon_int = 1000 * 1024; + tsf = mac80211_hwsim_get_tsf(hw, vif); + bcn_int = data->beacon_int; + until_tbtt = bcn_int - do_div(tsf, bcn_int); tasklet_hrtimer_start(&data->beacon_timer, - ns_to_ktime(data->beacon_int * - 1000), + ns_to_ktime(until_tbtt * 1000), HRTIMER_MODE_REL); } else if (!info->enable_beacon) tasklet_hrtimer_cancel(&data->beacon_timer); -- cgit v0.10.2 From 4a484cffc5e1836114e9556f7c704412d491200c Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 9 Jan 2013 10:22:07 +0100 Subject: regulatory: fix uevent The uevent callback doesn't protect its access to last_request, which now causes a warning since the conversion to get_last_request(). Fix this by allowing to use RCU protection for last_request. Reported-by: Emmanuel Grumbach Signed-off-by: Johannes Berg diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 0b35de0..2193f62 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -140,8 +140,8 @@ static void rcu_free_regdom(const struct ieee80211_regdomain *r) static struct regulatory_request *get_last_request(void) { - return rcu_dereference_protected(last_request, - lockdep_is_held(®_mutex)); + return rcu_dereference_check(last_request, + lockdep_is_held(®_mutex)); } /* Used to queue up regulatory hints */ @@ -2250,14 +2250,21 @@ int set_regdom(const struct ieee80211_regdomain *rd) #ifdef CONFIG_HOTPLUG int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) { - struct regulatory_request *lr = get_last_request(); + struct regulatory_request *lr; + u8 alpha2[2]; + bool add = false; + rcu_read_lock(); + lr = get_last_request(); if (lr && !lr->processed) { - if (add_uevent_var(env, "COUNTRY=%c%c", - lr->alpha2[0], lr->alpha2[1])) - return -ENOMEM; + memcpy(alpha2, lr->alpha2, 2); + add = true; } + rcu_read_unlock(); + if (add) + return add_uevent_var(env, "COUNTRY=%c%c", + alpha2[0], alpha2[1]); return 0; } #else -- cgit v0.10.2 From 2d31986764926630a6df72123a5e217219b32594 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 9 Jan 2013 12:01:38 +0100 Subject: regulatory: fix restore_regulatory_settings My commit 379b82f4c9dc6e67bf61aa61b096c06a2f320f60 ("regulatory: pass new regdomain to reset function") broke the restore_regulatory_settings() function due to a logic change. Consider this change: - reset_regdomains(true); - cfg80211_regdomain = cfg80211_world_regdom; + reset_regdomains(true, cfg80211_world_regdom); This looks innocent enough, until you realise that the called function (reset_regdomains) also resets the cfg80211_world_regdom pointer, so that the old version of the code would use the new object it pointed to and the new version of the code uses the old object. This lead to a double-free of this object. Since reset_regdomains() sets it to &world_regdom, use that directly. Reported-by: Sujith Manoharan Tested-by: Sujith Manoharan Reported-by: Bob Copeland Reported-by: Emmanuel Grumbach Signed-off-by: Johannes Berg diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 2193f62..8c114e8 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -1848,7 +1848,7 @@ static void restore_regulatory_settings(bool reset_user) mutex_lock(&cfg80211_mutex); mutex_lock(®_mutex); - reset_regdomains(true, cfg80211_world_regdom); + reset_regdomains(true, &world_regdom); restore_alpha2(alpha2, reset_user); /* -- cgit v0.10.2