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mac80211: refactor ieee80211_mesh_process_chanswitch() 

Refactor ieee80211_mesh_process_chanswitch() to use
ieee80211_channel_switch() and avoid code duplication.

Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Acked-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luciano Coelho 2014-01-13 19:42:58 +02:00 committed by Johannes Berg
parent 77d143de75
commit 0cb4d4dceb
3 changed files with 30 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
net/mac80211/cfg.c
View File

@ -3164,15 +3164,18 @@ int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
params->chandef.chan->band)
return -EINVAL;
ifmsh->chsw_init = true;
if (!ifmsh->pre_value)
ifmsh->pre_value = 1;
else
ifmsh->pre_value++;
err = ieee80211_mesh_csa_beacon(sdata, params, true);
if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_NONE)
ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_INIT;
err = ieee80211_mesh_csa_beacon(sdata, params,
(ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT));
if (err < 0) {
ifmsh->chsw_init = false;
ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
return err;
}
break;

6
net/mac80211/ieee80211_i.h
View File

@ -616,7 +616,11 @@ struct ieee80211_if_mesh {
struct ps_data ps;
/* Channel Switching Support */
struct mesh_csa_settings __rcu *csa;
bool chsw_init;
enum {
IEEE80211_MESH_CSA_ROLE_NONE,
IEEE80211_MESH_CSA_ROLE_INIT,
IEEE80211_MESH_CSA_ROLE_REPEATER,
} csa_role;
u8 chsw_ttl;
u16 pre_value;

74
net/mac80211/mesh.c
View File

@ -688,7 +688,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
*pos++ = csa->settings.count;
*pos++ = WLAN_EID_CHAN_SWITCH_PARAM;
*pos++ = 6;
if (ifmsh->chsw_init) {
if (ifmsh->csa_role == IEEE80211_MESH_CSA_ROLE_INIT) {
*pos++ = ifmsh->mshcfg.dot11MeshTTL;
*pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
} else {
@ -859,19 +859,11 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
{
struct cfg80211_csa_settings params;
struct ieee80211_csa_ie csa_ie;
struct ieee80211_chanctx_conf *chanctx_conf;
struct ieee80211_chanctx *chanctx;
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
int err, num_chanctx;
int err;
u32 sta_flags;
if (sdata->vif.csa_active)
return true;
if (!ifmsh->mesh_id)
return false;
sta_flags = IEEE80211_STA_DISABLE_VHT;
switch (sdata->vif.bss_conf.chandef.width) {
case NL80211_CHAN_WIDTH_20_NOHT:
@ -896,10 +888,6 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
params.chandef = csa_ie.chandef;
params.count = csa_ie.count;
if (sdata->vif.bss_conf.chandef.chan->band !=
params.chandef.chan->band)
return false;
if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, &params.chandef,
IEEE80211_CHAN_DISABLED)) {
sdata_info(sdata,
@ -922,24 +910,12 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
return false;
}
rcu_read_lock();
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
if (!chanctx_conf)
goto failed_chswitch;
/* don't handle for multi-VIF cases */
chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
if (chanctx->refcount > 1)
goto failed_chswitch;
num_chanctx = 0;
list_for_each_entry_rcu(chanctx, &sdata->local->chanctx_list, list)
num_chanctx++;
if (num_chanctx > 1)
goto failed_chswitch;
rcu_read_unlock();
if (cfg80211_chandef_identical(&params.chandef,
&sdata->vif.bss_conf.chandef)) {
mcsa_dbg(sdata,
"received csa with an identical chandef, ignoring\n");
return true;
}
mcsa_dbg(sdata,
"received channel switch announcement to go to channel %d MHz\n",
@ -953,30 +929,16 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata,
ifmsh->pre_value = csa_ie.pre_value;
}
if (ifmsh->chsw_ttl < ifmsh->mshcfg.dot11MeshTTL) {
if (ieee80211_mesh_csa_beacon(sdata, &params, false) < 0)
return false;
} else {
if (ifmsh->chsw_ttl >= ifmsh->mshcfg.dot11MeshTTL)
return false;
}
sdata->csa_radar_required = params.radar_required;
ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_REPEATER;
if (params.block_tx)
ieee80211_stop_queues_by_reason(&sdata->local->hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_CSA);
sdata->csa_chandef = params.chandef;
sdata->vif.csa_active = true;
ieee80211_bss_info_change_notify(sdata, err);
drv_channel_switch_beacon(sdata, &params.chandef);
if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
&params) < 0)
return false;
return true;
failed_chswitch:
rcu_read_unlock();
return false;
}
static void
@ -1086,7 +1048,8 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
ifmsh->sync_ops->rx_bcn_presp(sdata,
stype, mgmt, &elems, rx_status);
if (!ifmsh->chsw_init)
if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT &&
!sdata->vif.csa_active)
ieee80211_mesh_process_chnswitch(sdata, &elems, true);
}
@ -1097,7 +1060,7 @@ int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata)
int ret = 0;
/* Reset the TTL value and Initiator flag */
ifmsh->chsw_init = false;
ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
ifmsh->chsw_ttl = 0;
/* Remove the CSA and MCSP elements from the beacon */
@ -1210,7 +1173,8 @@ static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
ifmsh->pre_value = pre_value;
if (!ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
if (!sdata->vif.csa_active &&
!ieee80211_mesh_process_chnswitch(sdata, &elems, false)) {
mcsa_dbg(sdata, "Failed to process CSA action frame");
return;
}
@ -1365,7 +1329,7 @@ void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
mesh_rmc_init(sdata);
ifmsh->last_preq = jiffies;
ifmsh->next_perr = jiffies;
ifmsh->chsw_init = false;
ifmsh->csa_role = IEEE80211_MESH_CSA_ROLE_NONE;
/* Allocate all mesh structures when creating the first mesh interface. */
if (!mesh_allocated)
ieee80211s_init();