From a860402d8f1756dae48cdcabe153c974116fc37e Mon Sep 17 00:00:00 2001 From: Michael Buesch Date: Wed, 15 Apr 2009 14:41:22 -0400 Subject: mac80211: quiet beacon loss messages On Sunday 05 April 2009 11:29:38 Michael Buesch wrote: > On Sunday 05 April 2009 11:23:59 Jaswinder Singh Rajput wrote: > > With latest linus tree I am getting, .config file attached: > > > > [ 22.895051] r8169: eth0: link down > > [ 22.897564] ADDRCONF(NETDEV_UP): eth0: link is not ready > > [ 22.928047] ADDRCONF(NETDEV_UP): wlan0: link is not ready > > [ 22.982292] libvirtd used greatest stack depth: 4200 bytes left > > [ 63.709879] wlan0: authenticate with AP 00:11:95:9e:df:f6 > > [ 63.712096] wlan0: authenticated > > [ 63.712127] wlan0: associate with AP 00:11:95:9e:df:f6 > > [ 63.726831] wlan0: RX AssocResp from 00:11:95:9e:df:f6 (capab=0x471 status=0 aid=1) > > [ 63.726855] wlan0: associated > > [ 63.730093] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready > > [ 74.296087] wlan0: no IPv6 routers present > > [ 79.349044] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 119.358200] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 179.354292] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 259.366044] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 359.348292] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 361.953459] packagekitd used greatest stack depth: 4160 bytes left > > [ 478.824258] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 598.813343] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 718.817292] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 838.824567] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 958.815402] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1078.848434] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1198.822913] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1318.824931] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1438.814157] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1558.827336] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1678.823011] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1798.830589] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 1918.828044] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 2038.827224] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 2116.517152] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 2158.840243] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > [ 2278.827427] wlan0: beacon loss from AP 00:11:95:9e:df:f6 - sending probe request > > > I think this message should only show if CONFIG_MAC80211_VERBOSE_DEBUG is set. > It's kind of expected that we lose a beacon once in a while, so we shouldn't print > verbose messages to the kernel log (even if they are KERN_DEBUG). > > And besides that, I think one can easily remotely trigger this message and flood the logs. > So it should probably _also_ be ratelimited. Something like this: Signed-off-by: Michael Buesch --- net/mac80211/mlme.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) (limited to 'net') diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 7ecda9d59d8..1b14d0204dd 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -945,9 +945,13 @@ void ieee80211_beacon_loss_work(struct work_struct *work) u.mgd.beacon_loss_work); struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; - printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " - "- sending probe request\n", sdata->dev->name, - sdata->u.mgd.bssid); +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM " + "- sending probe request\n", sdata->dev->name, + sdata->u.mgd.bssid); + } +#endif ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, @@ -1007,9 +1011,13 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata) (local->hw.conf.flags & IEEE80211_CONF_PS)) && time_after(jiffies, ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) { - printk(KERN_DEBUG "%s: beacon loss from AP %pM " - "- sending probe request\n", - sdata->dev->name, ifmgd->bssid); +#ifdef CONFIG_MAC80211_VERBOSE_DEBUG + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: beacon loss from AP %pM " + "- sending probe request\n", + sdata->dev->name, ifmgd->bssid); + } +#endif ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL; ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid, ifmgd->ssid_len, NULL, 0); -- cgit v1.2.3-70-g09d2