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wifi: mac80211: RCU-ify link STA pointers

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We need to be able to access these in a race-free way under
traffic while adding/removing them, so RCU-ify the pointers.
This requires passing a link_sta to a lot of functions so
we don't have to do the RCU handling everywhere.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2022-06-15 09:20:45 +02:00
parent ce6893e917
commit c71420db65
17 changed files with 180 additions and 146 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/mac80211.h
View File

@ -2201,7 +2201,7 @@ struct ieee80211_sta {
u16 valid_links;
struct ieee80211_link_sta deflink;
struct ieee80211_link_sta *link[IEEE80211_MLD_MAX_NUM_LINKS];
struct ieee80211_link_sta __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS];
/* must be last */
u8 drv_priv[] __aligned(sizeof(void *));

12
net/mac80211/cfg.c
View File

@ -1771,19 +1771,21 @@ static int sta_apply_parameters(struct ieee80211_local *local,
if (params->ht_capa)
ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
params->ht_capa, sta, 0);
params->ht_capa,
&sta->deflink);
/* VHT can override some HT caps such as the A-MSDU max length */
if (params->vht_capa)
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
params->vht_capa, sta, 0);
params->vht_capa,
&sta->deflink);
if (params->he_capa)
ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband,
(void *)params->he_capa,
params->he_capa_len,
(void *)params->he_6ghz_capa,
sta, 0);
&sta->deflink);
if (params->eht_capa)
ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
@ -1791,13 +1793,13 @@ static int sta_apply_parameters(struct ieee80211_local *local,
params->he_capa_len,
params->eht_capa,
params->eht_capa_len,
sta, 0);
&sta->deflink);
if (params->opmode_notif_used) {
/* returned value is only needed for rc update, but the
* rc isn't initialized here yet, so ignore it
*/
__ieee80211_vht_handle_opmode(sdata, sta, 0,
__ieee80211_vht_handle_opmode(sdata, &sta->deflink,
params->opmode_notif,
sband->band);
}

25
net/mac80211/chan.c
View File

@ -207,16 +207,20 @@ ieee80211_find_reservation_chanctx(struct ieee80211_local *local,
static enum nl80211_chan_width ieee80211_get_sta_bw(struct sta_info *sta,
unsigned int link_id)
{
enum ieee80211_sta_rx_bandwidth width =
ieee80211_sta_cap_rx_bw(sta, link_id);
enum ieee80211_sta_rx_bandwidth width;
struct link_sta_info *link_sta;
link_sta = rcu_dereference(sta->link[link_id]);
/* no effect if this STA has no presence on this link */
if (!sta->sta.link[link_id])
if (!link_sta)
return NL80211_CHAN_WIDTH_20_NOHT;
width = ieee80211_sta_cap_rx_bw(link_sta);
switch (width) {
case IEEE80211_STA_RX_BW_20:
if (sta->sta.link[link_id]->ht_cap.ht_supported)
if (link_sta->pub->ht_cap.ht_supported)
return NL80211_CHAN_WIDTH_20;
else
return NL80211_CHAN_WIDTH_20_NOHT;
@ -416,6 +420,7 @@ static void ieee80211_chan_bw_change(struct ieee80211_local *local,
for (link_id = 0; link_id < ARRAY_SIZE(sta->sdata->link); link_id++) {
struct ieee80211_bss_conf *link_conf =
sdata->vif.link_conf[link_id];
struct link_sta_info *link_sta;
if (!link_conf)
continue;
@ -423,18 +428,22 @@ static void ieee80211_chan_bw_change(struct ieee80211_local *local,
if (rcu_access_pointer(link_conf->chanctx_conf) != &ctx->conf)
continue;
new_sta_bw = ieee80211_sta_cur_vht_bw(sta, link_id);
link_sta = rcu_dereference(sta->link[link_id]);
if (!link_sta)
continue;
new_sta_bw = ieee80211_sta_cur_vht_bw(link_sta);
/* nothing change */
if (new_sta_bw == sta->sta.link[link_id]->bandwidth)
if (new_sta_bw == link_sta->pub->bandwidth)
continue;
/* vif changed to narrow BW and narrow BW for station wasn't
* requested or vise versa */
if ((new_sta_bw < sta->sta.link[link_id]->bandwidth) == !narrowed)
if ((new_sta_bw < link_sta->pub->bandwidth) == !narrowed)
continue;
sta->sta.link[link_id]->bandwidth = new_sta_bw;
link_sta->pub->bandwidth = new_sta_bw;
rate_control_rate_update(local, sband, sta, link_id,
IEEE80211_RC_BW_CHANGED);
}

13
net/mac80211/eht.c
View File

@ -12,11 +12,10 @@ ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const u8 *he_cap_ie, u8 he_cap_len,
const struct ieee80211_eht_cap_elem *eht_cap_ie_elem,
u8 eht_cap_len, struct sta_info *sta,
unsigned int link_id)
u8 eht_cap_len,
struct link_sta_info *link_sta)
{
struct ieee80211_sta_eht_cap *eht_cap =
&sta->sta.link[link_id]->eht_cap;
struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
u8 eht_ppe_size = 0;
u8 mcs_nss_size;
@ -73,8 +72,6 @@ ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
eht_cap->has_eht = true;
sta->link[link_id]->cur_max_bandwidth =
ieee80211_sta_cap_rx_bw(sta, link_id);
sta->sta.link[link_id]->bandwidth =
ieee80211_sta_cur_vht_bw(sta, link_id);
link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
}

17
net/mac80211/he.c
View File

@ -10,8 +10,9 @@
static void
ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
struct sta_info *sta, unsigned int link_id)
struct link_sta_info *link_sta)
{
struct sta_info *sta = link_sta->sta;
enum ieee80211_smps_mode smps_mode;
if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
@ -49,7 +50,7 @@ ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_
break;
}
sta->sta.link[link_id]->he_6ghz_capa = *he_6ghz_capa;
link_sta->pub->he_6ghz_capa = *he_6ghz_capa;
}
static void ieee80211_he_mcs_disable(__le16 *he_mcs)
@ -108,9 +109,9 @@ ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const u8 *he_cap_ie, u8 he_cap_len,
const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
struct sta_info *sta, unsigned int link_id)
struct link_sta_info *link_sta)
{
struct ieee80211_sta_he_cap *he_cap = &sta->sta.link[link_id]->he_cap;
struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
struct ieee80211_sta_he_cap own_he_cap;
struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
u8 he_ppe_size;
@ -153,13 +154,11 @@ ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
he_cap->has_he = true;
sta->link[link_id]->cur_max_bandwidth =
ieee80211_sta_cap_rx_bw(sta, link_id);
sta->sta.link[link_id]->bandwidth =
ieee80211_sta_cur_vht_bw(sta, link_id);
link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, sta, link_id);
ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, link_sta);
ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80,
&he_cap->he_mcs_nss_supp.rx_mcs_80,

14
net/mac80211/ht.c
View File

@ -138,8 +138,9 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const struct ieee80211_ht_cap *ht_cap_ie,
struct sta_info *sta, unsigned int link_id)
struct link_sta_info *link_sta)
{
struct sta_info *sta = link_sta->sta;
struct ieee80211_sta_ht_cap ht_cap, own_cap;
u8 ampdu_info, tx_mcs_set_cap;
int i, max_tx_streams;
@ -243,12 +244,11 @@ bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839;
apply:
changed = memcmp(&sta->sta.link[link_id]->ht_cap,
&ht_cap, sizeof(ht_cap));
changed = memcmp(&link_sta->pub->ht_cap, &ht_cap, sizeof(ht_cap));
memcpy(&sta->sta.link[link_id]->ht_cap, &ht_cap, sizeof(ht_cap));
memcpy(&link_sta->pub->ht_cap, &ht_cap, sizeof(ht_cap));
switch (sdata->vif.link_conf[link_id]->chandef.width) {
switch (sdata->vif.link_conf[link_sta->link_id]->chandef.width) {
default:
WARN_ON_ONCE(1);
fallthrough;
@ -265,9 +265,9 @@ bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
break;
}
sta->sta.link[link_id]->bandwidth = bw;
link_sta->pub->bandwidth = bw;
sta->link[link_id]->cur_max_bandwidth =
link_sta->cur_max_bandwidth =
ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;

5
net/mac80211/ibss.c
View File

@ -1051,7 +1051,7 @@ static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata,
memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie));
rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
&htcap_ie,
sta, 0);
&sta->deflink);
if (elems->vht_operation && elems->vht_cap_elem &&
sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 &&
@ -1068,7 +1068,8 @@ static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata,
&chandef);
memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie));
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
&cap_ie, sta, 0);
&cap_ie,
&sta->deflink);
if (memcmp(&cap, &sta->sta.deflink.vht_cap, sizeof(cap)))
rates_updated |= true;
}

30
net/mac80211/ieee80211_i.h
View File

@ -2061,7 +2061,7 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const struct ieee80211_ht_cap *ht_cap_ie,
struct sta_info *sta, unsigned int link_id);
struct link_sta_info *link_sta);
void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
const u8 *da, u16 tid,
u16 initiator, u16 reason_code);
@ -2117,31 +2117,31 @@ void
ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const struct ieee80211_vht_cap *vht_cap_ie,
struct sta_info *sta, unsigned int link_id);
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta,
unsigned int link_id);
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta,
unsigned int link_id);
void ieee80211_sta_set_rx_nss(struct sta_info *sta, unsigned int link_id);
struct link_sta_info *link_sta);
enum ieee80211_sta_rx_bandwidth
ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta);
enum ieee80211_sta_rx_bandwidth
ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta);
void ieee80211_sta_set_rx_nss(struct link_sta_info *link_sta);
enum ieee80211_sta_rx_bandwidth
ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width);
enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta,
unsigned int link_id);
enum nl80211_chan_width
ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta);
void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
unsigned int link_id,
struct ieee80211_mgmt *mgmt);
u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, unsigned int link_id,
struct link_sta_info *sta,
u8 opmode, enum nl80211_band band);
void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, unsigned int link_id,
struct link_sta_info *sta,
u8 opmode, enum nl80211_band band);
void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
struct ieee80211_sta_vht_cap *vht_cap);
void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
u16 vht_mask[NL80211_VHT_NSS_MAX]);
enum nl80211_chan_width
ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta, unsigned int link_id);
ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *sta);
/* HE */
void
@ -2149,7 +2149,7 @@ ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const u8 *he_cap_ie, u8 he_cap_len,
const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
struct sta_info *sta, unsigned int link_id);
struct link_sta_info *link_sta);
void
ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
const struct ieee80211_he_spr *he_spr_ie_elem);
@ -2560,6 +2560,6 @@ ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const u8 *he_cap_ie, u8 he_cap_len,
const struct ieee80211_eht_cap_elem *eht_cap_ie_elem,
u8 eht_cap_len, struct sta_info *sta,
unsigned int link_id);
u8 eht_cap_len,
struct link_sta_info *link_sta);
#endif /* IEEE80211_I_H */

3
net/mac80211/iface.c
View File

@ -1525,7 +1525,8 @@ static void ieee80211_iface_process_skb(struct ieee80211_local *local,
sta = sta_info_get_bss(sdata, mgmt->sa);
if (sta)
ieee80211_vht_handle_opmode(sdata, sta, 0,
ieee80211_vht_handle_opmode(sdata,
&sta->deflink,
opmode, band);
mutex_unlock(&local->sta_mtx);

8
net/mac80211/mesh_plink.c
View File

@ -438,16 +438,18 @@ static void mesh_sta_info_init(struct ieee80211_sub_if_data *sdata,
sta->sta.deflink.supp_rates[sband->band] = rates;
if (ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
elems->ht_cap_elem, sta, 0))
elems->ht_cap_elem,
&sta->deflink))
changed |= IEEE80211_RC_BW_CHANGED;
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
elems->vht_cap_elem, sta, 0);
elems->vht_cap_elem,
&sta->deflink);
ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, elems->he_cap,
elems->he_cap_len,
elems->he_6ghz_capa,
sta, 0);
&sta->deflink);
if (bw != sta->sta.deflink.bandwidth)
changed |= IEEE80211_RC_BW_CHANGED;

12
net/mac80211/mlme.c
View File

@ -3566,12 +3566,13 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
/* Set up internal HT/VHT capabilities */
if (elems->ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
elems->ht_cap_elem, sta, 0);
elems->ht_cap_elem,
&sta->deflink);
if (elems->vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
elems->vht_cap_elem,
sta, 0);
&sta->deflink);
if (elems->he_operation && !(ifmgd->flags & IEEE80211_STA_DISABLE_HE) &&
elems->he_cap) {
@ -3579,7 +3580,7 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
elems->he_cap,
elems->he_cap_len,
elems->he_6ghz_capa,
sta, 0);
&sta->deflink);
bss_conf->he_support = sta->sta.deflink.he_cap.has_he;
if (elems->rsnx && elems->rsnx_len &&
@ -3599,7 +3600,7 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
elems->he_cap_len,
elems->eht_cap,
elems->eht_cap_len,
sta, 0);
&sta->deflink);
bss_conf->eht_support = sta->sta.deflink.eht_cap.has_eht;
} else {
@ -4378,7 +4379,8 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
}
if (sta && elems->opmode_notif)
ieee80211_vht_handle_opmode(sdata, sta, 0,
ieee80211_vht_handle_opmode(sdata,
&sta->deflink,
*elems->opmode_notif,
rx_status->band);
mutex_unlock(&local->sta_mtx);

2
net/mac80211/rate.c
View File

@ -37,7 +37,7 @@ void rate_control_rate_init(struct sta_info *sta)
struct ieee80211_supported_band *sband;
struct ieee80211_chanctx_conf *chanctx_conf;
ieee80211_sta_set_rx_nss(sta, 0);
ieee80211_sta_set_rx_nss(&sta->deflink);
if (!ref)
return;

6
net/mac80211/rx.c
View File

@ -3391,11 +3391,11 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ)
max_bw = IEEE80211_STA_RX_BW_20;
else
max_bw = ieee80211_sta_cap_rx_bw(rx->sta, 0);
max_bw = ieee80211_sta_cap_rx_bw(&rx->sta->deflink);
/* set cur_max_bandwidth and recalc sta bw */
rx->sta->deflink.cur_max_bandwidth = max_bw;
new_bw = ieee80211_sta_cur_vht_bw(rx->sta, 0);
new_bw = ieee80211_sta_cur_vht_bw(&rx->sta->deflink);
if (rx->sta->sta.deflink.bandwidth == new_bw)
goto handled;
@ -3403,7 +3403,7 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
rx->sta->sta.deflink.bandwidth = new_bw;
sband = rx->local->hw.wiphy->bands[status->band];
sta_opmode.bw =
ieee80211_sta_rx_bw_to_chan_width(rx->sta, 0);
ieee80211_sta_rx_bw_to_chan_width(&rx->sta->deflink);
sta_opmode.changed = STA_OPMODE_MAX_BW_CHANGED;
rate_control_rate_update(local, sband, rx->sta, 0,

28
net/mac80211/sta_info.c
View File

@ -67,6 +67,7 @@
struct sta_link_alloc {
struct link_sta_info info;
struct ieee80211_link_sta sta;
struct rcu_head rcu_head;
};
static const struct rhashtable_params sta_rht_params = {
@ -258,19 +259,23 @@ static void sta_info_free_link(struct link_sta_info *link_sta)
static void sta_remove_link(struct sta_info *sta, unsigned int link_id)
{
struct sta_link_alloc *alloc = NULL;
struct link_sta_info *link_sta;
if (WARN_ON(!sta->link[link_id]))
link_sta = rcu_dereference_protected(sta->link[link_id],
lockdep_is_held(&sta->local->sta_mtx));
if (WARN_ON(!link_sta))
return;
if (sta->link[link_id] != &sta->deflink)
alloc = container_of(sta->link[link_id], typeof(*alloc), info);
if (link_sta != &sta->deflink)
alloc = container_of(link_sta, typeof(*alloc), info);
sta->sta.valid_links &= ~BIT(link_id);
sta->link[link_id] = NULL;
sta->sta.link[link_id] = NULL;
RCU_INIT_POINTER(sta->link[link_id], NULL);
RCU_INIT_POINTER(sta->sta.link[link_id], NULL);
if (alloc) {
sta_info_free_link(&alloc->info);
kfree(alloc);
kfree_rcu(alloc, rcu_head);
}
}
@ -404,8 +409,9 @@ static void sta_info_add_link(struct sta_info *sta,
{
link_info->sta = sta;
link_info->link_id = link_id;
sta->link[link_id] = link_info;
sta->sta.link[link_id] = link_sta;
link_info->pub = link_sta;
rcu_assign_pointer(sta->link[link_id], link_info);
rcu_assign_pointer(sta->sta.link[link_id], link_sta);
}
struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
@ -2682,13 +2688,15 @@ int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id)
int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct link_sta_info *link_sta;
u16 old_links = sta->sta.valid_links;
u16 new_links = old_links | BIT(link_id);
int ret;
lockdep_assert_held(&sdata->local->sta_mtx);
link_sta = rcu_dereference_protected(sta->link[link_id],
lockdep_is_held(&sdata->local->sta_mtx));
if (WARN_ON(old_links == new_links || !sta->link[link_id]))
if (WARN_ON(old_links == new_links || !link_sta))
return -EINVAL;
sta->sta.valid_links = new_links;

5
net/mac80211/sta_info.h
View File

@ -516,6 +516,7 @@ struct ieee80211_fragment_cache {
* @status_stats.last_ack_signal: last ACK signal
* @status_stats.ack_signal_filled: last ACK signal validity
* @status_stats.avg_ack_signal: average ACK signal
* @pub: public (driver visible) link STA data
* TODO Move other link params from sta_info as required for MLD operation
*/
struct link_sta_info {
@ -561,6 +562,8 @@ struct link_sta_info {
} tx_stats;
enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
struct ieee80211_link_sta *pub;
};
/**
@ -708,7 +711,7 @@ struct sta_info {
struct ieee80211_fragment_cache frags;
struct link_sta_info deflink;
struct link_sta_info *link[IEEE80211_MLD_MAX_NUM_LINKS];
struct link_sta_info __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS];
/* keep last! */
struct ieee80211_sta sta;

5
net/mac80211/tdls.c
View File

@ -308,7 +308,8 @@ ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata,
/* IEEE802.11ac-2013 Table E-4 */
u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 };
struct cfg80211_chan_def uc = sta->tdls_chandef;
enum nl80211_chan_width max_width = ieee80211_sta_cap_chan_bw(sta, 0);
enum nl80211_chan_width max_width =
ieee80211_sta_cap_chan_bw(&sta->deflink);
int i;
/* only support upgrading non-narrow channels up to 80Mhz */
@ -1268,7 +1269,7 @@ static void iee80211_tdls_recalc_chanctx(struct ieee80211_sub_if_data *sdata,
enum ieee80211_sta_rx_bandwidth bw;
bw = ieee80211_chan_width_to_rx_bw(conf->def.width);
bw = min(bw, ieee80211_sta_cap_rx_bw(sta, 0));
bw = min(bw, ieee80211_sta_cap_rx_bw(&sta->deflink));
if (bw != sta->sta.deflink.bandwidth) {
sta->sta.deflink.bandwidth = bw;
rate_control_rate_update(local, sband, sta, 0,

139
net/mac80211/vht.c
View File

@ -116,16 +116,16 @@ void
ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
const struct ieee80211_vht_cap *vht_cap_ie,
struct sta_info *sta, unsigned int link_id)
struct link_sta_info *link_sta)
{
struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.link[link_id]->vht_cap;
struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
struct ieee80211_sta_vht_cap own_cap;
u32 cap_info, i;
bool have_80mhz;
memset(vht_cap, 0, sizeof(*vht_cap));
if (!sta->sta.link[link_id]->ht_cap.ht_supported)
if (!link_sta->pub->ht_cap.ht_supported)
return;
if (!vht_cap_ie || !sband->vht_cap.vht_supported)
@ -162,7 +162,7 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
* our own capabilities and then use those below.
*/
if (sdata->vif.type == NL80211_IFTYPE_STATION &&
!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
!test_sta_flag(link_sta->sta, WLAN_STA_TDLS_PEER))
ieee80211_apply_vhtcap_overrides(sdata, &own_cap);
/* take some capabilities as-is */
@ -286,8 +286,9 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
*/
if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) {
vht_cap->vht_supported = false;
sdata_info(sdata, "Ignoring VHT IE from %pM due to invalid rx_mcs_map\n",
sta->addr);
sdata_info(sdata,
"Ignoring VHT IE from %pM (link:%pM) due to invalid rx_mcs_map\n",
link_sta->sta->addr, link_sta->addr);
return;
}
@ -295,10 +296,10 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
sta->link[link_id]->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
break;
default:
sta->link[link_id]->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
if (!(vht_cap->vht_mcs.tx_highest &
cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
@ -310,35 +311,40 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
* above) between 160 and 80+80 yet.
*/
if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
sta->link[link_id]->cur_max_bandwidth =
link_sta->cur_max_bandwidth =
IEEE80211_STA_RX_BW_160;
}
sta->sta.link[link_id]->bandwidth = ieee80211_sta_cur_vht_bw(sta, link_id);
link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
/*
* FIXME - should the amsdu len be per link? store per link
* and maintain a minimum?
*/
switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
link_sta->sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
break;
case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
link_sta->sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
break;
case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
default:
sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
link_sta->sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
break;
}
}
/* FIXME: move this to some better location - parses HE/EHT now */
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta,
unsigned int link_id)
enum ieee80211_sta_rx_bandwidth
ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta)
{
struct ieee80211_bss_conf *link_conf = sta->sdata->vif.link_conf[link_id];
struct ieee80211_link_sta *link_sta = sta->sta.link[link_id];
struct ieee80211_sta_vht_cap *vht_cap = &link_sta->vht_cap;
struct ieee80211_sta_he_cap *he_cap = &link_sta->he_cap;
struct ieee80211_sta_eht_cap *eht_cap = &link_sta->eht_cap;
unsigned int link_id = link_sta->link_id;
struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata;
struct ieee80211_bss_conf *link_conf = sdata->vif.link_conf[link_id];
struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
u32 cap_width;
if (he_cap->has_he) {
@ -371,7 +377,7 @@ enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta,
}
if (!vht_cap->vht_supported)
return link_sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
IEEE80211_STA_RX_BW_40 :
IEEE80211_STA_RX_BW_20;
@ -392,17 +398,17 @@ enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta,
return IEEE80211_STA_RX_BW_80;
}
enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta,
unsigned int link_id)
enum nl80211_chan_width
ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta)
{
struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.link[link_id]->vht_cap;
struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
u32 cap_width;
if (!vht_cap->vht_supported) {
if (!sta->sta.link[link_id]->ht_cap.ht_supported)
if (!link_sta->pub->ht_cap.ht_supported)
return NL80211_CHAN_WIDTH_20_NOHT;
return sta->sta.link[link_id]->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20;
}
@ -417,17 +423,17 @@ enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta,
}
enum nl80211_chan_width
ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta, unsigned int link_id)
ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta)
{
enum ieee80211_sta_rx_bandwidth cur_bw =
sta->sta.link[link_id]->bandwidth;
link_sta->pub->bandwidth;
struct ieee80211_sta_vht_cap *vht_cap =
&sta->sta.link[link_id]->vht_cap;
&link_sta->pub->vht_cap;
u32 cap_width;
switch (cur_bw) {
case IEEE80211_STA_RX_BW_20:
if (!sta->sta.link[link_id]->ht_cap.ht_supported)
if (!link_sta->pub->ht_cap.ht_supported)
return NL80211_CHAN_WIDTH_20_NOHT;
else
return NL80211_CHAN_WIDTH_20;
@ -471,15 +477,17 @@ ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
}
/* FIXME: rename/move - this deals with everything not just VHT */
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta,
unsigned int link_id)
enum ieee80211_sta_rx_bandwidth
ieee80211_sta_cur_vht_bw(struct link_sta_info *link_sta)
{
struct ieee80211_bss_conf *link_conf = sta->sdata->vif.link_conf[link_id];
struct sta_info *sta = link_sta->sta;
struct ieee80211_bss_conf *link_conf =
sta->sdata->vif.link_conf[link_sta->link_id];
enum nl80211_chan_width bss_width = link_conf->chandef.width;
enum ieee80211_sta_rx_bandwidth bw;
bw = ieee80211_sta_cap_rx_bw(sta, link_id);
bw = min(bw, sta->link[link_id]->cur_max_bandwidth);
bw = ieee80211_sta_cap_rx_bw(link_sta);
bw = min(bw, link_sta->cur_max_bandwidth);
/* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of
* IEEE80211-2016 specification makes higher bandwidth operation
@ -501,18 +509,18 @@ enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta,
return bw;
}
void ieee80211_sta_set_rx_nss(struct sta_info *sta, unsigned int link_id)
void ieee80211_sta_set_rx_nss(struct link_sta_info *link_sta)
{
u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss;
bool support_160;
/* if we received a notification already don't overwrite it */
if (sta->sta.link[link_id]->rx_nss)
if (link_sta->pub->rx_nss)
return;
if (sta->sta.link[link_id]->eht_cap.has_eht) {
if (link_sta->pub->eht_cap.has_eht) {
int i;
const u8 *rx_nss_mcs = (void *)&sta->sta.link[link_id]->eht_cap.eht_mcs_nss_supp;
const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp;
/* get the max nss for EHT over all possible bandwidths and mcs */
for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++)
@ -521,10 +529,10 @@ void ieee80211_sta_set_rx_nss(struct sta_info *sta, unsigned int link_id)
IEEE80211_EHT_MCS_NSS_RX));
}
if (sta->sta.link[link_id]->he_cap.has_he) {
if (link_sta->pub->he_cap.has_he) {
int i;
u8 rx_mcs_80 = 0, rx_mcs_160 = 0;
const struct ieee80211_sta_he_cap *he_cap = &sta->sta.link[link_id]->he_cap;
const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
u16 mcs_160_map =
le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
@ -555,23 +563,23 @@ void ieee80211_sta_set_rx_nss(struct sta_info *sta, unsigned int link_id)
he_rx_nss = rx_mcs_80;
}
if (sta->sta.link[link_id]->ht_cap.ht_supported) {
if (sta->sta.link[link_id]->ht_cap.mcs.rx_mask[0])
if (link_sta->pub->ht_cap.ht_supported) {
if (link_sta->pub->ht_cap.mcs.rx_mask[0])
ht_rx_nss++;
if (sta->sta.link[link_id]->ht_cap.mcs.rx_mask[1])
if (link_sta->pub->ht_cap.mcs.rx_mask[1])
ht_rx_nss++;
if (sta->sta.link[link_id]->ht_cap.mcs.rx_mask[2])
if (link_sta->pub->ht_cap.mcs.rx_mask[2])
ht_rx_nss++;
if (sta->sta.link[link_id]->ht_cap.mcs.rx_mask[3])
if (link_sta->pub->ht_cap.mcs.rx_mask[3])
ht_rx_nss++;
/* FIXME: consider rx_highest? */
}
if (sta->sta.link[link_id]->vht_cap.vht_supported) {
if (link_sta->pub->vht_cap.vht_supported) {
int i;
u16 rx_mcs_map;
rx_mcs_map = le16_to_cpu(sta->sta.link[link_id]->vht_cap.vht_mcs.rx_mcs_map);
rx_mcs_map = le16_to_cpu(link_sta->pub->vht_cap.vht_mcs.rx_mcs_map);
for (i = 7; i >= 0; i--) {
u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
@ -587,11 +595,11 @@ void ieee80211_sta_set_rx_nss(struct sta_info *sta, unsigned int link_id)
rx_nss = max(vht_rx_nss, ht_rx_nss);
rx_nss = max(he_rx_nss, rx_nss);
rx_nss = max(eht_rx_nss, rx_nss);
sta->sta.link[link_id]->rx_nss = max_t(u8, 1, rx_nss);
link_sta->pub->rx_nss = max_t(u8, 1, rx_nss);
}
u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, unsigned int link_id,
struct link_sta_info *link_sta,
u8 opmode, enum nl80211_band band)
{
enum ieee80211_sta_rx_bandwidth new_bw;
@ -607,8 +615,8 @@ u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
nss += 1;
if (sta->sta.link[link_id]->rx_nss != nss) {
sta->sta.link[link_id]->rx_nss = nss;
if (link_sta->pub->rx_nss != nss) {
link_sta->pub->rx_nss = nss;
sta_opmode.rx_nss = nss;
changed |= IEEE80211_RC_NSS_CHANGED;
sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
@ -617,34 +625,34 @@ u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
/* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
sta->link[link_id]->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
break;
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
/* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */
sta->link[link_id]->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
break;
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80)
sta->link[link_id]->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
else
sta->link[link_id]->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
break;
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
/* legacy only, no longer used by newer spec */
sta->link[link_id]->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
break;
}
new_bw = ieee80211_sta_cur_vht_bw(sta, link_id);
if (new_bw != sta->sta.link[link_id]->bandwidth) {
sta->sta.link[link_id]->bandwidth = new_bw;
sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(sta, link_id);
new_bw = ieee80211_sta_cur_vht_bw(link_sta);
if (new_bw != link_sta->pub->bandwidth) {
link_sta->pub->bandwidth = new_bw;
sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_sta);
changed |= IEEE80211_RC_BW_CHANGED;
sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED;
}
if (sta_opmode.changed)
cfg80211_sta_opmode_change_notify(sdata->dev, sta->addr,
cfg80211_sta_opmode_change_notify(sdata->dev, link_sta->addr,
&sta_opmode, GFP_KERNEL);
return changed;
@ -689,18 +697,19 @@ void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id,
EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, unsigned int link_id,
struct link_sta_info *link_sta,
u8 opmode, enum nl80211_band band)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, link_id,
u32 changed = __ieee80211_vht_handle_opmode(sdata, link_sta,
opmode, band);
if (changed > 0) {
ieee80211_recalc_min_chandef(sdata);
rate_control_rate_update(local, sband, sta, link_id, changed);
rate_control_rate_update(local, sband, link_sta->sta,
link_sta->link_id, changed);
}
}