This patch add support to configure peer specific rssi configuration
to monitor station's signal strength variation.
New NL80211_CMD_SET_STA_MON introduced to configure rssi threshold
and hysteresis info using NL80211_ATTR_STA_MON_RSSI_THOLD and
NL80211_ATTR_STA_MON_RSSI_HYST along with NL80211_ATTR_MAC.
Driver supporting this configuration should advertise
NL80211_EXT_FEATURE_STA_MON_RSSI_CONFIG.
Monitoring station's signal strength variation will be useful
for the application like steering.
Signed-off-by: Tamizh chelvam <tamizhr@xxxxxxxxxxxxxx>
---
include/net/cfg80211.h | 9 ++++++
include/uapi/linux/nl80211.h | 55 +++++++++++++++++++++++++++++++
net/wireless/nl80211.c | 77 ++++++++++++++++++++++++++++++++++++++++++++
net/wireless/rdev-ops.h | 16 +++++++++
net/wireless/trace.h | 25 ++++++++++++++
5 files changed, 182 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 656031e..8e4c7db 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -3024,6 +3024,11 @@ struct cfg80211_external_auth_params {
*
* @tx_control_port: TX a control port frame (EAPoL). The noencrypt parameter
* tells the driver that the frame should not be encrypted.
+ * @set_sta_mon_rssi_config: Configure RSSI threshold for a station.
+ * After configuration, the driver should (soon) send an event indicating
+ * the current level of a station is above/below the configured threshold;
+ * this may need some care when the configuration is changed
+ * (without first being disabled.)
*/
struct cfg80211_ops {
int (*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -3329,6 +3334,10 @@ struct cfg80211_ops {
const u8 *buf, size_t len,
const u8 *dest, const __be16 proto,
const bool noencrypt);
+ int (*set_sta_mon_rssi_config)(struct wiphy *wiphy,
+ struct net_device *dev,
+ const u8 *addr,
+ s32 rssi_thold, u32 rssi_hyst);
};
/*
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 28b3654..f13ad07 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1033,6 +1033,9 @@
* &NL80211_ATTR_CHANNEL_WIDTH,&NL80211_ATTR_NSS attributes with its
* address(specified in &NL80211_ATTR_MAC).
*
+ * @NL80211_CMD_SET_STA_MON: This command is used to configure station's
+ * connection monitoring notification trigger levels.
+ *
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@@ -1245,6 +1248,8 @@ enum nl80211_commands {
NL80211_CMD_CONTROL_PORT_FRAME,
+ NL80211_CMD_SET_STA_MON,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -2238,6 +2243,9 @@ enum nl80211_commands {
* @NL80211_ATTR_TXQ_QUANTUM: TXQ scheduler quantum (bytes). Number of bytes
* a flow is assigned on each round of the DRR scheduler.
*
+ * @NL80211_ATTR_STA_MON: Station's connection monitor configuration in a
+ * nested attribute with %NL80211_ATTR_STA_MON_* sub-attributes.
+ *
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@@ -2677,6 +2685,8 @@ enum nl80211_attrs {
NL80211_ATTR_TXQ_MEMORY_LIMIT,
NL80211_ATTR_TXQ_QUANTUM,
+ NL80211_ATTR_STA_MON,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -4276,6 +4286,46 @@ enum nl80211_ps_state {
};
/**
+ * enum nl80211_attr_sta_mon - Attributes to monitor station's connection
+ * @NL80211_ATTR_STA_MON_RSSI_THOLD: RSSI threshold in dBm. This value specifies
+ * the threshold for the RSSI level at which an event will be sent. Zero
+ * to disable. Alternatively, if %NL80211_EXT_FEATURE_STA_MON_RSSI_LIST is
+ * set, multiple values can be supplied as a low-to-high sorted array of\
+ * threshold values in dBm. Events will be sent when the RSSI value
+ * crosses any of the thresholds. This threshold values are station
+ * specific.
+ * @NL80211_ATTR_STA_MON_RSSI_HYST: RSSI hysteresis in dBm. This value specifies
+ * the minimum amount the RSSI level must change after an event before a
+ * new event may be issued (to reduce effects of RSSI oscillation).
+ * @NL80211_ATTR_STA_MON_RSSI_THRESHOLD_EVENT: RSSI threshold event
+ * @NL80211_ATTR_STA_MON_RSSI_LEVEL: the RSSI value in dBm that triggered the
+ * RSSI threshold event.
+ */
+enum nl80211_attr_sta_mon {
+ __NL80211_ATTR_STA_MON_INVALID,
+ NL80211_ATTR_STA_MON_RSSI_THOLD,
+ NL80211_ATTR_STA_MON_RSSI_HYST,
+ NL80211_ATTR_STA_MON_RSSI_THRESHOLD_EVENT,
+ NL80211_ATTR_STA_MON_RSSI_LEVEL,
+
+ /* keep last */
+ __NL80211_ATTR_STA_MON_AFTER_LAST,
+ NL80211_ATTR_STA_MON_MAX = __NL80211_ATTR_STA_MON_AFTER_LAST - 1,
+};
+
+/**
+ * enum nl80211_sta_mon_rssi_threshold_event - RSSI threshold event
+ * @NL80211_STA_MON_RSSI_THRESHOLD_EVENT_LOW: The RSSI level is lower than the
+ * configured threshold
+ * @NL80211_STA_MON_RSSI_THRESHOLD_EVENT_HIGH: The RSSI is higher than the
+ * configured threshold
+ */
+enum nl80211_sta_mon_rssi_threshold_event {
+ NL80211_STA_MON_RSSI_THRESHOLD_EVENT_LOW,
+ NL80211_STA_MON_RSSI_THRESHOLD_EVENT_HIGH,
+};
+
+/**
* enum nl80211_attr_cqm - connection quality monitor attributes
* @__NL80211_ATTR_CQM_INVALID: invalid
* @NL80211_ATTR_CQM_RSSI_THOLD: RSSI threshold in dBm. This value specifies
@@ -5134,6 +5184,10 @@ enum nl80211_feature_flags {
* @NL80211_EXT_FEATURE_TXQS: Driver supports FQ-CoDel-enabled intermediate
* TXQs.
*
+ * @NL80211_EXT_FEATURE_STA_MON_RSSI_CONFIG: With this driver can set
+ * rssi threshold using %NL80211_ATTR_STA_MON_RSSI_THOLD attribute
+ * for a connected station.
+ *
* @NUM_NL80211_EXT_FEATURES: number of extended features.
* @MAX_NL80211_EXT_FEATURES: highest extended feature index.
*/
@@ -5167,6 +5221,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211,
NL80211_EXT_FEATURE_DATA_ACK_SIGNAL_SUPPORT,
NL80211_EXT_FEATURE_TXQS,
+ NL80211_EXT_FEATURE_STA_MON_RSSI_CONFIG,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 2fb2e97..587a5cb1 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -428,6 +428,7 @@ enum nl80211_multicast_groups {
[NL80211_ATTR_TXQ_LIMIT] = { .type = NLA_U32 },
[NL80211_ATTR_TXQ_MEMORY_LIMIT] = { .type = NLA_U32 },
[NL80211_ATTR_TXQ_QUANTUM] = { .type = NLA_U32 },
+ [NL80211_ATTR_STA_MON] = { .type = NLA_NESTED },
};
/* policy for the key attributes */
@@ -10131,6 +10132,14 @@ static int nl80211_set_cqm_txe(struct genl_info *info,
return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
}
+static const struct nla_policy
+nl80211_attr_sta_mon_policy[NL80211_ATTR_STA_MON_MAX + 1] = {
+ [NL80211_ATTR_STA_MON_RSSI_THOLD] = { .type = NLA_U32 },
+ [NL80211_ATTR_STA_MON_RSSI_HYST] = { .type = NLA_U32 },
+ [NL80211_ATTR_STA_MON_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
+ [NL80211_ATTR_STA_MON_RSSI_LEVEL] = { .type = NLA_S32 },
+};
+
static int cfg80211_cqm_rssi_update(struct cfg80211_registered_device *rdev,
struct net_device *dev)
{
@@ -12912,6 +12921,66 @@ static int nl80211_tx_control_port(struct sk_buff *skb, struct genl_info *info)
return err;
}
+static int nl80211_set_sta_mon_rssi(struct genl_info *info,
+ const u8 *peer, s32 threshold,
+ u32 hysteresis)
+{
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ struct net_device *dev = info->user_ptr[1];
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+
+ if (threshold > 0)
+ return -EINVAL;
+
+ if (threshold == 0)
+ hysteresis = 0;
+
+ if (!rdev->ops->set_sta_mon_rssi_config)
+ return -EOPNOTSUPP;
+
+ if ((wdev->iftype != NL80211_IFTYPE_AP &&
+ wdev->iftype != NL80211_IFTYPE_P2P_GO &&
+ wdev->iftype != NL80211_IFTYPE_AP_VLAN) ||
+ !wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_STA_MON_RSSI_CONFIG))
+ return -EOPNOTSUPP;
+
+ return rdev_set_sta_mon_rssi_config(rdev, dev, peer,
+ threshold, hysteresis);
+}
+
+static int nl80211_sta_mon(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *attrs[NL80211_ATTR_STA_MON_MAX + 1];
+ struct nlattr *sta_mon;
+ u8 *addr = NULL;
+ int err;
+
+ sta_mon = info->attrs[NL80211_ATTR_STA_MON];
+ if (!sta_mon || !(info->attrs[NL80211_ATTR_MAC]))
+ return -EINVAL;
+
+ err = nla_parse_nested(attrs, NL80211_ATTR_STA_MON_MAX,
+ sta_mon, nl80211_attr_sta_mon_policy,
+ info->extack);
+
+ if (err)
+ return err;
+
+ addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
+ if (attrs[NL80211_ATTR_STA_MON_RSSI_THOLD] &&
+ attrs[NL80211_ATTR_STA_MON_RSSI_HYST]) {
+ s32 threshold =
+ nla_get_s32(attrs[NL80211_ATTR_STA_MON_RSSI_THOLD]);
+ u32 hysteresis =
+ nla_get_u32(attrs[NL80211_ATTR_STA_MON_RSSI_HYST]);
+
+ return nl80211_set_sta_mon_rssi(info, addr, threshold,
+ hysteresis);
+ }
+ return -EINVAL;
+}
+
#define NL80211_FLAG_NEED_WIPHY 0x01
#define NL80211_FLAG_NEED_NETDEV 0x02
#define NL80211_FLAG_NEED_RTNL 0x04
@@ -13823,6 +13892,14 @@ static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
NL80211_FLAG_NEED_RTNL,
},
+ {
+ .cmd = NL80211_CMD_SET_STA_MON,
+ .doit = nl80211_sta_mon,
+ .policy = nl80211_policy,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
+ NL80211_FLAG_NEED_RTNL,
+ },
};
static struct genl_family nl80211_fam __ro_after_init = {
diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h
index 364f5d6..faccfae 100644
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -1232,4 +1232,20 @@ static inline int rdev_del_pmk(struct cfg80211_registered_device *rdev,
return ret;
}
+static inline int
+rdev_set_sta_mon_rssi_config(struct cfg80211_registered_device *rdev,
+ struct net_device *dev, const u8 *peer,
+ s32 rssi_thold, u32 rssi_hyst)
+
+{
+ int ret;
+
+ trace_rdev_set_sta_mon_rssi_config(&rdev->wiphy, dev, peer,
+ rssi_thold, rssi_hyst);
+ ret = rdev->ops->set_sta_mon_rssi_config(&rdev->wiphy, dev, peer,
+ rssi_thold, rssi_hyst);
+ trace_rdev_return_int(&rdev->wiphy, ret);
+ return ret;
+}
+
#endif /* __CFG80211_RDEV_OPS */
diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index 2b417a2..361ec08 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -3257,6 +3257,31 @@
),
TP_printk(WIPHY_PR_FMT ", " WDEV_PR_FMT, WIPHY_PR_ARG, WDEV_PR_ARG)
);
+
+TRACE_EVENT(rdev_set_sta_mon_rssi_config,
+ TP_PROTO(struct wiphy *wiphy,
+ struct net_device *netdev, const u8 *peer,
+ s32 rssi_thold, u32 rssi_hyst),
+ TP_ARGS(wiphy, netdev, peer, rssi_thold, rssi_hyst),
+ TP_STRUCT__entry(
+ WIPHY_ENTRY
+ NETDEV_ENTRY
+ MAC_ENTRY(peer)
+ __field(s32, rssi_thold)
+ __field(u32, rssi_hyst)
+ ),
+ TP_fast_assign(
+ WIPHY_ASSIGN;
+ NETDEV_ASSIGN;
+ MAC_ASSIGN(peer, peer);
+ __entry->rssi_thold = rssi_thold;
+ __entry->rssi_hyst = rssi_hyst;
+ ),
+ TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", " MAC_PR_FMT
+ ", rssi_thold: %d, rssi_hyst: %u ",
+ WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(peer),
+ __entry->rssi_thold, __entry->rssi_hyst)
+);
#endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
#undef TRACE_INCLUDE_PATH
--
1.9.1
