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wifi: mac80211: refactor some sta_info link handling 

Refactor the code a bit to initialize a link belonging
to a station, and (later) free all allocated links.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-05-30 21:31:37 +02:00
parent 2a5ccbeec0
commit 246b39e4a1
1 changed files with 56 additions and 23 deletions
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79
net/mac80211/sta_info.c
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@ -245,6 +245,20 @@ struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
return NULL;
}
static void sta_info_free_links(struct sta_info *sta)
{
unsigned int link_id;
for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
if (!sta->link[link_id])
continue;
free_percpu(sta->link[link_id]->pcpu_rx_stats);
if (sta->link[link_id] != &sta->deflink)
kfree(sta->link[link_id]);
}
}
/**
* sta_info_free - free STA
*
@ -287,7 +301,8 @@ void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
#ifdef CONFIG_MAC80211_MESH
kfree(sta->mesh);
#endif
free_percpu(sta->deflink.pcpu_rx_stats);
sta_info_free_links(sta);
kfree(sta);
}
@ -333,6 +348,40 @@ static int sta_prepare_rate_control(struct ieee80211_local *local,
return 0;
}
static int sta_info_init_link(struct sta_info *sta,
unsigned int link_id,
struct link_sta_info *link_info,
struct ieee80211_link_sta *link_sta,
gfp_t gfp)
{
struct ieee80211_local *local = sta->local;
struct ieee80211_hw *hw = &local->hw;
int i;
link_info->sta = sta;
link_info->link_id = link_id;
if (ieee80211_hw_check(hw, USES_RSS)) {
link_info->pcpu_rx_stats =
alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
if (!link_info->pcpu_rx_stats)
return -ENOMEM;
}
sta->link[link_id] = link_info;
sta->sta.link[link_id] = link_sta;
link_info->rx_stats.last_rx = jiffies;
u64_stats_init(&link_info->rx_stats.syncp);
ewma_signal_init(&link_info->rx_stats_avg.signal);
ewma_avg_signal_init(&link_info->status_stats.avg_ack_signal);
for (i = 0; i < ARRAY_SIZE(link_info->rx_stats_avg.chain_signal); i++)
ewma_signal_init(&link_info->rx_stats_avg.chain_signal[i]);
return 0;
}
struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
const u8 *addr, gfp_t gfp)
{
@ -345,12 +394,11 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
if (!sta)
return NULL;
if (ieee80211_hw_check(hw, USES_RSS)) {
sta->deflink.pcpu_rx_stats =
alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
if (!sta->deflink.pcpu_rx_stats)
goto free;
}
sta->local = local;
sta->sdata = sdata;
if (sta_info_init_link(sta, 0, &sta->deflink, &sta->sta.deflink, gfp))
return NULL;
spin_lock_init(&sta->lock);
spin_lock_init(&sta->ps_lock);
@ -378,12 +426,6 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
/* TODO link specific alloc and assignments for MLO Link STA */
/* For non MLO STA, link info can be accessed either via deflink
* or link[0]
*/
sta->link[0] = &sta->deflink;
sta->sta.link[0] = &sta->sta.deflink;
/* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
* The Tx path starts to use a key as soon as the key slot ptk_idx
* references to is not NULL. To not use the initial Rx-only key
@ -393,11 +435,6 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
sta->ptk_idx = INVALID_PTK_KEYIDX;
sta->local = local;
sta->sdata = sdata;
sta->deflink.rx_stats.last_rx = jiffies;
u64_stats_init(&sta->deflink.rx_stats.syncp);
ieee80211_init_frag_cache(&sta->frags);
@ -407,10 +444,6 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
sta->reserved_tid = IEEE80211_TID_UNRESERVED;
sta->last_connected = ktime_get_seconds();
ewma_signal_init(&sta->deflink.rx_stats_avg.signal);
ewma_avg_signal_init(&sta->deflink.status_stats.avg_ack_signal);
for (i = 0; i < ARRAY_SIZE(sta->deflink.rx_stats_avg.chain_signal); i++)
ewma_signal_init(&sta->deflink.rx_stats_avg.chain_signal[i]);
if (local->ops->wake_tx_queue) {
void *txq_data;
@ -532,7 +565,7 @@ free_txq:
if (sta->sta.txq[0])
kfree(to_txq_info(sta->sta.txq[0]));
free:
free_percpu(sta->deflink.pcpu_rx_stats);
sta_info_free_links(sta);
#ifdef CONFIG_MAC80211_MESH
kfree(sta->mesh);
#endif