PMSR (a.k.a. peer measurement) is generalized measurement between two
devices with Wi-Fi support. And currently FTM (a.k.a. fine time
measurement or flight time measurement) is the one and only measurement.
This change allows mac80211_hwsim to abort previous PMSR request. The
abortion request is sent to the wmedium where the PMSR request is
actually handled.
This change adds HWSIM_CMD_ABORT_PMSR. When mac80211_hwsim receives the
PMSR abortion request via ieee80211_ops.abort_pmsr, the received
cfg80211_pmsr_request is resent to the wmediumd with command
HWSIM_CMD_ABORT_PMSR and attribute HWSIM_ATTR_PMSR_REQUEST. The
attribute is formatted as the same way as nl80211_pmsr_start() expects.
Signed-off-by: Jaewan Kim <jaewan@xxxxxxxxxx>
---
V1: Initial commit (split from previously large patch)
---
drivers/net/wireless/mac80211_hwsim.c | 61 +++++++++++++++++++++++++++
drivers/net/wireless/mac80211_hwsim.h | 2 +
2 files changed, 63 insertions(+)
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 331772ff5d45..874c768e73e7 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -3343,6 +3343,66 @@ static int mac80211_hwsim_start_pmsr(struct ieee80211_hw *hw,
return err;
}
+static void mac80211_hwsim_abort_pmsr(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct cfg80211_pmsr_request *request)
+{
+ struct mac80211_hwsim_data *data = hw->priv;
+ u32 _portid = READ_ONCE(data->wmediumd);
+ struct sk_buff *skb = NULL;
+ int err = 0;
+ void *msg_head;
+ struct nlattr *pmsr;
+
+ if (!_portid && !hwsim_virtio_enabled)
+ return;
+
+ mutex_lock(&data->mutex);
+
+ if (data->pmsr_request != request) {
+ err = -EINVAL;
+ goto out_err;
+ }
+
+ if (err)
+ return;
+
+ skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!skb)
+ return;
+
+ msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0, HWSIM_CMD_ABORT_PMSR);
+
+ if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER, ETH_ALEN, data->addresses[1].addr))
+ goto out_err;
+
+ pmsr = nla_nest_start(skb, HWSIM_ATTR_PMSR_REQUEST);
+ if (!pmsr) {
+ err = -ENOMEM;
+ goto out_err;
+ }
+
+ err = mac80211_hwsim_send_pmsr_request(skb, request);
+ if (err)
+ goto out_err;
+
+ err = nla_nest_end(skb, pmsr);
+ if (err)
+ goto out_err;
+
+ genlmsg_end(skb, msg_head);
+ if (hwsim_virtio_enabled)
+ hwsim_tx_virtio(data, skb);
+ else
+ hwsim_unicast_netgroup(data, skb, _portid);
+
+out_err:
+ if (err && skb)
+ nlmsg_free(skb);
+
+ mutex_unlock(&data->mutex);
+}
+
#define HWSIM_COMMON_OPS \
.tx = mac80211_hwsim_tx, \
.wake_tx_queue = ieee80211_handle_wake_tx_queue, \
@@ -3367,6 +3427,7 @@ static int mac80211_hwsim_start_pmsr(struct ieee80211_hw *hw,
.get_et_stats = mac80211_hwsim_get_et_stats, \
.get_et_strings = mac80211_hwsim_get_et_strings, \
.start_pmsr = mac80211_hwsim_start_pmsr, \
+ .abort_pmsr = mac80211_hwsim_abort_pmsr,
#define HWSIM_NON_MLO_OPS \
.sta_add = mac80211_hwsim_sta_add, \
diff --git a/drivers/net/wireless/mac80211_hwsim.h b/drivers/net/wireless/mac80211_hwsim.h
index 4af237cef904..39911cc9533d 100644
--- a/drivers/net/wireless/mac80211_hwsim.h
+++ b/drivers/net/wireless/mac80211_hwsim.h
@@ -82,6 +82,7 @@ enum hwsim_tx_control_flags {
* @HWSIM_CMD_DEL_MAC_ADDR: remove the MAC address again, the attributes
* are the same as to @HWSIM_CMD_ADD_MAC_ADDR.
* @HWSIM_CMD_START_PMSR: start PMSR
+ * @HWSIM_CMD_ABORT_PMSR: abort PMSR
* @__HWSIM_CMD_MAX: enum limit
*/
enum {
@@ -95,6 +96,7 @@ enum {
HWSIM_CMD_ADD_MAC_ADDR,
HWSIM_CMD_DEL_MAC_ADDR,
HWSIM_CMD_START_PMSR,
+ HWSIM_CMD_ABORT_PMSR,
__HWSIM_CMD_MAX,
};
#define HWSIM_CMD_MAX (_HWSIM_CMD_MAX - 1)
--
2.39.1.519.gcb327c4b5f-goog
