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Commit a7c7fbff authored by Purushottam Kushwaha's avatar Purushottam Kushwaha Committed by Johannes Berg
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cfg80211: Add support to configure a beacon data rate 

This allows an option to configure a single beacon tx rate for an AP.
Signed-off-by: default avatarPurushottam Kushwaha <pkushwah@qti.qualcomm.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent c13ed534
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Inline Side-by-side
Showing with 302 additions and 233 deletions
include/net/cfg80211.h
View file @ a7c7fbff
...@@ -676,6 +676,18 @@ struct cfg80211_acl_data { ...@@ -676,6 +676,18 @@ struct cfg80211_acl_data {
struct mac_address mac_addrs[]; struct mac_address mac_addrs[];
}; };
/*
* cfg80211_bitrate_mask - masks for bitrate control
*/
struct cfg80211_bitrate_mask {
struct {
u32 legacy;
u8 ht_mcs[IEEE80211_HT_MCS_MASK_LEN];
u16 vht_mcs[NL80211_VHT_NSS_MAX];
enum nl80211_txrate_gi gi;
} control[NUM_NL80211_BANDS];
};
/** /**
* struct cfg80211_ap_settings - AP configuration * struct cfg80211_ap_settings - AP configuration
* *
...@@ -700,6 +712,7 @@ struct cfg80211_acl_data { ...@@ -700,6 +712,7 @@ struct cfg80211_acl_data {
* MAC address based access control * MAC address based access control
* @pbss: If set, start as a PCP instead of AP. Relevant for DMG * @pbss: If set, start as a PCP instead of AP. Relevant for DMG
* networks. * networks.
* @beacon_rate: masks for setting user configured beacon tx rate.
*/ */
struct cfg80211_ap_settings { struct cfg80211_ap_settings {
struct cfg80211_chan_def chandef; struct cfg80211_chan_def chandef;
...@@ -719,6 +732,7 @@ struct cfg80211_ap_settings { ...@@ -719,6 +732,7 @@ struct cfg80211_ap_settings {
bool p2p_opp_ps; bool p2p_opp_ps;
const struct cfg80211_acl_data *acl; const struct cfg80211_acl_data *acl;
bool pbss; bool pbss;
struct cfg80211_bitrate_mask beacon_rate;
}; };
/** /**
...@@ -2010,17 +2024,6 @@ enum wiphy_params_flags { ...@@ -2010,17 +2024,6 @@ enum wiphy_params_flags {
WIPHY_PARAM_DYN_ACK = 1 << 5, WIPHY_PARAM_DYN_ACK = 1 << 5,
}; };
/*
* cfg80211_bitrate_mask - masks for bitrate control
*/
struct cfg80211_bitrate_mask {
struct {
u32 legacy;
u8 ht_mcs[IEEE80211_HT_MCS_MASK_LEN];
u16 vht_mcs[NL80211_VHT_NSS_MAX];
enum nl80211_txrate_gi gi;
} control[NUM_NL80211_BANDS];
};
/** /**
* struct cfg80211_pmksa - PMK Security Association * struct cfg80211_pmksa - PMK Security Association
* *
......
net/wireless/nl80211.c
View file @ a7c7fbff
...@@ -3340,6 +3340,279 @@ static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info) ...@@ -3340,6 +3340,279 @@ static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
return err; return err;
} }
static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
u8 *rates, u8 rates_len)
{
u8 i;
u32 mask = 0;
for (i = 0; i < rates_len; i++) {
int rate = (rates[i] & 0x7f) * 5;
int ridx;
for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
struct ieee80211_rate *srate =
&sband->bitrates[ridx];
if (rate == srate->bitrate) {
mask |= 1 << ridx;
break;
}
}
if (ridx == sband->n_bitrates)
return 0; /* rate not found */
}
return mask;
}
static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
u8 *rates, u8 rates_len,
u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
{
u8 i;
memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
for (i = 0; i < rates_len; i++) {
int ridx, rbit;
ridx = rates[i] / 8;
rbit = BIT(rates[i] % 8);
/* check validity */
if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
return false;
/* check availability */
if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
mcs[ridx] |= rbit;
else
return false;
}
return true;
}
static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
{
u16 mcs_mask = 0;
switch (vht_mcs_map) {
case IEEE80211_VHT_MCS_NOT_SUPPORTED:
break;
case IEEE80211_VHT_MCS_SUPPORT_0_7:
mcs_mask = 0x00FF;
break;
case IEEE80211_VHT_MCS_SUPPORT_0_8:
mcs_mask = 0x01FF;
break;
case IEEE80211_VHT_MCS_SUPPORT_0_9:
mcs_mask = 0x03FF;
break;
default:
break;
}
return mcs_mask;
}
static void vht_build_mcs_mask(u16 vht_mcs_map,
u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
{
u8 nss;
for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
vht_mcs_map >>= 2;
}
}
static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
struct nl80211_txrate_vht *txrate,
u16 mcs[NL80211_VHT_NSS_MAX])
{
u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
u8 i;
if (!sband->vht_cap.vht_supported)
return false;
memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
/* Build vht_mcs_mask from VHT capabilities */
vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
mcs[i] = txrate->mcs[i];
else
return false;
}
return true;
}
static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
[NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_RATES },
[NL80211_TXRATE_HT] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_HT_RATES },
[NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
[NL80211_TXRATE_GI] = { .type = NLA_U8 },
};
static int nl80211_parse_tx_bitrate_mask(struct genl_info *info,
struct cfg80211_bitrate_mask *mask)
{
struct nlattr *tb[NL80211_TXRATE_MAX + 1];
struct cfg80211_registered_device *rdev = info->user_ptr[0];
int rem, i;
struct nlattr *tx_rates;
struct ieee80211_supported_band *sband;
u16 vht_tx_mcs_map;
memset(mask, 0, sizeof(*mask));
/* Default to all rates enabled */
for (i = 0; i < NUM_NL80211_BANDS; i++) {
sband = rdev->wiphy.bands[i];
if (!sband)
continue;
mask->control[i].legacy = (1 << sband->n_bitrates) - 1;
memcpy(mask->control[i].ht_mcs,
sband->ht_cap.mcs.rx_mask,
sizeof(mask->control[i].ht_mcs));
if (!sband->vht_cap.vht_supported)
continue;
vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
vht_build_mcs_mask(vht_tx_mcs_map, mask->control[i].vht_mcs);
}
/* if no rates are given set it back to the defaults */
if (!info->attrs[NL80211_ATTR_TX_RATES])
goto out;
/* The nested attribute uses enum nl80211_band as the index. This maps
* directly to the enum nl80211_band values used in cfg80211.
*/
BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
enum nl80211_band band = nla_type(tx_rates);
int err;
if (band < 0 || band >= NUM_NL80211_BANDS)
return -EINVAL;
sband = rdev->wiphy.bands[band];
if (sband == NULL)
return -EINVAL;
err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
nla_len(tx_rates), nl80211_txattr_policy);
if (err)
return err;
if (tb[NL80211_TXRATE_LEGACY]) {
mask->control[band].legacy = rateset_to_mask(
sband,
nla_data(tb[NL80211_TXRATE_LEGACY]),
nla_len(tb[NL80211_TXRATE_LEGACY]));
if ((mask->control[band].legacy == 0) &&
nla_len(tb[NL80211_TXRATE_LEGACY]))
return -EINVAL;
}
if (tb[NL80211_TXRATE_HT]) {
if (!ht_rateset_to_mask(
sband,
nla_data(tb[NL80211_TXRATE_HT]),
nla_len(tb[NL80211_TXRATE_HT]),
mask->control[band].ht_mcs))
return -EINVAL;
}
if (tb[NL80211_TXRATE_VHT]) {
if (!vht_set_mcs_mask(
sband,
nla_data(tb[NL80211_TXRATE_VHT]),
mask->control[band].vht_mcs))
return -EINVAL;
}
if (tb[NL80211_TXRATE_GI]) {
mask->control[band].gi =
nla_get_u8(tb[NL80211_TXRATE_GI]);
if (mask->control[band].gi > NL80211_TXRATE_FORCE_LGI)
return -EINVAL;
}
if (mask->control[band].legacy == 0) {
/* don't allow empty legacy rates if HT or VHT
* are not even supported.
*/
if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
rdev->wiphy.bands[band]->vht_cap.vht_supported))
return -EINVAL;
for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
if (mask->control[band].ht_mcs[i])
goto out;
for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
if (mask->control[band].vht_mcs[i])
goto out;
/* legacy and mcs rates may not be both empty */
return -EINVAL;
}
}
out:
return 0;
}
static int validate_beacon_tx_rate(struct cfg80211_ap_settings *params)
{
u32 rate, count_ht, count_vht, i;
enum nl80211_band band;
band = params->chandef.chan->band;
rate = params->beacon_rate.control[band].legacy;
/* Allow only one rate */
if (hweight32(rate) > 1)
return -EINVAL;
count_ht = 0;
for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
if (hweight8(params->beacon_rate.control[band].ht_mcs[i]) > 1) {
return -EINVAL;
} else if (params->beacon_rate.control[band].ht_mcs[i]) {
count_ht++;
if (count_ht > 1)
return -EINVAL;
}
if (count_ht && rate)
return -EINVAL;
}
count_vht = 0;
for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
if (hweight16(params->beacon_rate.control[band].vht_mcs[i]) > 1) {
return -EINVAL;
} else if (params->beacon_rate.control[band].vht_mcs[i]) {
count_vht++;
if (count_vht > 1)
return -EINVAL;
}
if (count_vht && rate)
return -EINVAL;
}
if ((count_ht && count_vht) || (!rate && !count_ht && !count_vht))
return -EINVAL;
return 0;
}
static int nl80211_parse_beacon(struct nlattr *attrs[], static int nl80211_parse_beacon(struct nlattr *attrs[],
struct cfg80211_beacon_data *bcn) struct cfg80211_beacon_data *bcn)
{ {
...@@ -3569,6 +3842,16 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) ...@@ -3569,6 +3842,16 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
wdev->iftype)) wdev->iftype))
return -EINVAL; return -EINVAL;
if (info->attrs[NL80211_ATTR_TX_RATES]) {
err = nl80211_parse_tx_bitrate_mask(info, &params.beacon_rate);
if (err)
return err;
err = validate_beacon_tx_rate(&params);
if (err)
return err;
}
if (info->attrs[NL80211_ATTR_SMPS_MODE]) { if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
params.smps_mode = params.smps_mode =
nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]); nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
...@@ -8641,238 +8924,21 @@ static int nl80211_cancel_remain_on_channel(struct sk_buff *skb, ...@@ -8641,238 +8924,21 @@ static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
return rdev_cancel_remain_on_channel(rdev, wdev, cookie); return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
} }
static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
u8 *rates, u8 rates_len)
{
u8 i;
u32 mask = 0;
for (i = 0; i < rates_len; i++) {
int rate = (rates[i] & 0x7f) * 5;
int ridx;
for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
struct ieee80211_rate *srate =
&sband->bitrates[ridx];
if (rate == srate->bitrate) {
mask |= 1 << ridx;
break;
}
}
if (ridx == sband->n_bitrates)
return 0; /* rate not found */
}
return mask;
}
static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
u8 *rates, u8 rates_len,
u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
{
u8 i;
memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
for (i = 0; i < rates_len; i++) {
int ridx, rbit;
ridx = rates[i] / 8;
rbit = BIT(rates[i] % 8);
/* check validity */
if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
return false;
/* check availability */
if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
mcs[ridx] |= rbit;
else
return false;
}
return true;
}
static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
{
u16 mcs_mask = 0;
switch (vht_mcs_map) {
case IEEE80211_VHT_MCS_NOT_SUPPORTED:
break;
case IEEE80211_VHT_MCS_SUPPORT_0_7:
mcs_mask = 0x00FF;
break;
case IEEE80211_VHT_MCS_SUPPORT_0_8:
mcs_mask = 0x01FF;
break;
case IEEE80211_VHT_MCS_SUPPORT_0_9:
mcs_mask = 0x03FF;
break;
default:
break;
}
return mcs_mask;
}
static void vht_build_mcs_mask(u16 vht_mcs_map,
u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
{
u8 nss;
for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
vht_mcs_map >>= 2;
}
}
static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
struct nl80211_txrate_vht *txrate,
u16 mcs[NL80211_VHT_NSS_MAX])
{
u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
u8 i;
if (!sband->vht_cap.vht_supported)
return false;
memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
/* Build vht_mcs_mask from VHT capabilities */
vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
mcs[i] = txrate->mcs[i];
else
return false;
}
return true;
}
static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
[NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_RATES },
[NL80211_TXRATE_HT] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_HT_RATES },
[NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
[NL80211_TXRATE_GI] = { .type = NLA_U8 },
};
static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb, static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
struct genl_info *info) struct genl_info *info)
{ {
struct nlattr *tb[NL80211_TXRATE_MAX + 1];
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct cfg80211_bitrate_mask mask; struct cfg80211_bitrate_mask mask;
int rem, i; struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1]; struct net_device *dev = info->user_ptr[1];
struct nlattr *tx_rates; int err;
struct ieee80211_supported_band *sband;
u16 vht_tx_mcs_map;
if (!rdev->ops->set_bitrate_mask) if (!rdev->ops->set_bitrate_mask)
return -EOPNOTSUPP; return -EOPNOTSUPP;
memset(&mask, 0, sizeof(mask)); err = nl80211_parse_tx_bitrate_mask(info, &mask);
/* Default to all rates enabled */ if (err)
for (i = 0; i < NUM_NL80211_BANDS; i++) { return err;
sband = rdev->wiphy.bands[i];
if (!sband)
continue;
mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
memcpy(mask.control[i].ht_mcs,
sband->ht_cap.mcs.rx_mask,
sizeof(mask.control[i].ht_mcs));
if (!sband->vht_cap.vht_supported)
continue;
vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
}
/* if no rates are given set it back to the defaults */
if (!info->attrs[NL80211_ATTR_TX_RATES])
goto out;
/*
* The nested attribute uses enum nl80211_band as the index. This maps
* directly to the enum nl80211_band values used in cfg80211.
*/
BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
enum nl80211_band band = nla_type(tx_rates);
int err;
if (band < 0 || band >= NUM_NL80211_BANDS)
return -EINVAL;
sband = rdev->wiphy.bands[band];
if (sband == NULL)
return -EINVAL;
err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
nla_len(tx_rates), nl80211_txattr_policy);
if (err)
return err;
if (tb[NL80211_TXRATE_LEGACY]) {
mask.control[band].legacy = rateset_to_mask(
sband,
nla_data(tb[NL80211_TXRATE_LEGACY]),
nla_len(tb[NL80211_TXRATE_LEGACY]));
if ((mask.control[band].legacy == 0) &&
nla_len(tb[NL80211_TXRATE_LEGACY]))
return -EINVAL;
}
if (tb[NL80211_TXRATE_HT]) {
if (!ht_rateset_to_mask(
sband,
nla_data(tb[NL80211_TXRATE_HT]),
nla_len(tb[NL80211_TXRATE_HT]),
mask.control[band].ht_mcs))
return -EINVAL;
}
if (tb[NL80211_TXRATE_VHT]) {
if (!vht_set_mcs_mask(
sband,
nla_data(tb[NL80211_TXRATE_VHT]),
mask.control[band].vht_mcs))
return -EINVAL;
}
if (tb[NL80211_TXRATE_GI]) {
mask.control[band].gi =
nla_get_u8(tb[NL80211_TXRATE_GI]);
if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
return -EINVAL;
}
if (mask.control[band].legacy == 0) {
/* don't allow empty legacy rates if HT or VHT
* are not even supported.
*/
if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
rdev->wiphy.bands[band]->vht_cap.vht_supported))
return -EINVAL;
for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
if (mask.control[band].ht_mcs[i])
goto out;
for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
if (mask.control[band].vht_mcs[i])
goto out;
/* legacy and mcs rates may not be both empty */
return -EINVAL;
}
}
out:
return rdev_set_bitrate_mask(rdev, dev, NULL, &mask); return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
} }
......
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