diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2022-06-17 22:36:37 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2022-07-15 11:43:14 +0200 |
| commit | d8675a63518c6148827838058feb7f18403faed1 (patch) | |
| tree | fbdee52aa9f31da2b33ad5804cc4ea76a9a82a24 /net/mac80211/trace.h | |
| parent | 3d1cc7cdf2e848181398837fe158bf0850d29ee6 (diff) | |
wifi: mac80211: RCU-ify link/link_conf pointers
Since links can be added and removed dynamically, we need to
somehow protect the sdata->link[] and vif->link_conf[] array
pointers from disappearing when accessing them without locks.
RCU-ify the pointers to achieve this, which requires quite a
bit of rework.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/trace.h')
| -rw-r--r-- | net/mac80211/trace.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h index f96e7cdca4c2..6aa06fba5b50 100644 --- a/net/mac80211/trace.h +++ b/net/mac80211/trace.h @@ -446,9 +446,10 @@ TRACE_EVENT(drv_vif_cfg_changed, TRACE_EVENT(drv_link_info_changed, TP_PROTO(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, + struct ieee80211_bss_conf *link_conf, int link_id, u64 changed), - TP_ARGS(local, sdata, link_id, changed), + TP_ARGS(local, sdata, link_conf, link_id, changed), TP_STRUCT__entry( LOCAL_ENTRY @@ -481,8 +482,6 @@ TRACE_EVENT(drv_link_info_changed, ), TP_fast_assign( - struct ieee80211_bss_conf *link_conf = sdata->vif.link_conf[link_id]; - LOCAL_ASSIGN; VIF_ASSIGN; __entry->changed = changed; @@ -1752,10 +1751,9 @@ DEFINE_EVENT(local_sdata_chanctx, drv_unassign_vif_chanctx, TRACE_EVENT(drv_start_ap, TP_PROTO(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, - struct ieee80211_bss_conf *info, unsigned int link_id), - TP_ARGS(local, sdata, info, link_id), + TP_ARGS(local, sdata, link_id), TP_STRUCT__entry( LOCAL_ENTRY @@ -1768,15 +1766,20 @@ TRACE_EVENT(drv_start_ap, ), TP_fast_assign( + struct ieee80211_bss_conf *info = + sdata_dereference(sdata->vif.link_conf[link_id], sdata); + LOCAL_ASSIGN; VIF_ASSIGN; __entry->link_id = link_id; - __entry->dtimper = info->dtim_period; - __entry->bcnint = info->beacon_int; + if (info) { + __entry->dtimper = info->dtim_period; + __entry->bcnint = info->beacon_int; + __entry->hidden_ssid = info->hidden_ssid; + } memcpy(__get_dynamic_array(ssid), sdata->vif.cfg.ssid, sdata->vif.cfg.ssid_len); - __entry->hidden_ssid = info->hidden_ssid; ), TP_printk( |