diff options
| author | Michal Kazior | 2014-04-09 15:29:27 +0200 |
|---|---|---|
| committer | Johannes Berg | 2014-04-25 17:08:29 +0200 |
| commit | e3afb920227d37fe72914350c41621c028539077 (patch) | |
| tree | 8a33d0983dd8db843e98ad52d590075f9c0fbc4e /net | |
| parent | mac80211: track assigned vifs in chanctx (diff) | |
| download | kernel-qcow2-linux-e3afb920227d37fe72914350c41621c028539077.tar.gz kernel-qcow2-linux-e3afb920227d37fe72914350c41621c028539077.tar.xz kernel-qcow2-linux-e3afb920227d37fe72914350c41621c028539077.zip | |
mac80211: track reserved vifs in chanctx
This can be useful. Provides a more straghtforward
way to iterate over interfaces taking part in
chanctx reservation and allows tracking chanctx
usage explicitly.
The structure is protected by local->chanctx_mtx.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/chan.c | 14 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 2 | ||||
| -rw-r--r-- | net/mac80211/iface.c | 1 |
3 files changed, 13 insertions, 4 deletions
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 504526c97867..79eac96d9e5f 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -277,6 +277,7 @@ ieee80211_new_chanctx(struct ieee80211_local *local, return ERR_PTR(-ENOMEM); INIT_LIST_HEAD(&ctx->assigned_vifs); + INIT_LIST_HEAD(&ctx->reserved_vifs); ctx->conf.def = *chandef; ctx->conf.rx_chains_static = 1; ctx->conf.rx_chains_dynamic = 1; @@ -731,16 +732,19 @@ void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata) { + struct ieee80211_chanctx *ctx = sdata->reserved_chanctx; + lockdep_assert_held(&sdata->local->chanctx_mtx); - if (WARN_ON(!sdata->reserved_chanctx)) + if (WARN_ON(!ctx)) return -EINVAL; - if (--sdata->reserved_chanctx->refcount == 0) - ieee80211_free_chanctx(sdata->local, sdata->reserved_chanctx); - + list_del(&sdata->reserved_chanctx_list); sdata->reserved_chanctx = NULL; + if (--ctx->refcount == 0) + ieee80211_free_chanctx(sdata->local, ctx); + return 0; } @@ -788,6 +792,7 @@ int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, } } + list_add(&sdata->reserved_chanctx_list, &new_ctx->reserved_vifs); new_ctx->refcount++; sdata->reserved_chanctx = new_ctx; sdata->reserved_chandef = *chandef; @@ -837,6 +842,7 @@ int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata, ctx->refcount--; sdata->reserved_chanctx = NULL; sdata->radar_required = sdata->reserved_radar_required; + list_del(&sdata->reserved_chanctx_list); if (old_ctx == ctx) { /* This is our own context, just change it */ diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 3b3b45a21501..3eaf6d7fad52 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -692,6 +692,7 @@ struct ieee80211_chanctx { struct rcu_head rcu_head; struct list_head assigned_vifs; + struct list_head reserved_vifs; enum ieee80211_chanctx_mode mode; int refcount; @@ -759,6 +760,7 @@ struct ieee80211_sub_if_data { struct cfg80211_chan_def csa_chandef; struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */ + struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */ /* context reservation -- protected with chanctx_mtx */ struct ieee80211_chanctx *reserved_chanctx; diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index a562d0f489e1..e91569d887e3 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -1292,6 +1292,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); INIT_LIST_HEAD(&sdata->assigned_chanctx_list); + INIT_LIST_HEAD(&sdata->reserved_chanctx_list); switch (type) { case NL80211_IFTYPE_P2P_GO: |