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-rw-r--r--net/bluetooth/msft.c412
1 files changed, 397 insertions, 15 deletions
diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c
index bf5cee48916c..abbafa6194ca 100644
--- a/net/bluetooth/msft.c
+++ b/net/bluetooth/msft.c
@@ -91,6 +91,33 @@ struct msft_ev_le_monitor_device {
struct msft_monitor_advertisement_handle_data {
__u8 msft_handle;
__u16 mgmt_handle;
+ __s8 rssi_high;
+ __s8 rssi_low;
+ __u8 rssi_low_interval;
+ __u8 rssi_sampling_period;
+ __u8 cond_type;
+ struct list_head list;
+};
+
+enum monitor_addr_filter_state {
+ AF_STATE_IDLE,
+ AF_STATE_ADDING,
+ AF_STATE_ADDED,
+ AF_STATE_REMOVING,
+};
+
+#define MSFT_MONITOR_ADVERTISEMENT_TYPE_ADDR 0x04
+struct msft_monitor_addr_filter_data {
+ __u8 msft_handle;
+ __u8 pattern_handle; /* address filters pertain to */
+ __u16 mgmt_handle;
+ int state;
+ __s8 rssi_high;
+ __s8 rssi_low;
+ __u8 rssi_low_interval;
+ __u8 rssi_sampling_period;
+ __u8 addr_type;
+ bdaddr_t bdaddr;
struct list_head list;
};
@@ -99,9 +126,12 @@ struct msft_data {
__u8 evt_prefix_len;
__u8 *evt_prefix;
struct list_head handle_map;
+ struct list_head address_filters;
__u8 resuming;
__u8 suspending;
__u8 filter_enabled;
+ /* To synchronize add/remove address filter and monitor device event.*/
+ struct mutex filter_lock;
};
bool msft_monitor_supported(struct hci_dev *hdev)
@@ -180,6 +210,24 @@ static struct msft_monitor_advertisement_handle_data *msft_find_handle_data
return NULL;
}
+/* This function requires the caller holds msft->filter_lock */
+static struct msft_monitor_addr_filter_data *msft_find_address_data
+ (struct hci_dev *hdev, u8 addr_type, bdaddr_t *addr,
+ u8 pattern_handle)
+{
+ struct msft_monitor_addr_filter_data *entry;
+ struct msft_data *msft = hdev->msft_data;
+
+ list_for_each_entry(entry, &msft->address_filters, list) {
+ if (entry->pattern_handle == pattern_handle &&
+ addr_type == entry->addr_type &&
+ !bacmp(addr, &entry->bdaddr))
+ return entry;
+ }
+
+ return NULL;
+}
+
/* This function requires the caller holds hdev->lock */
static int msft_monitor_device_del(struct hci_dev *hdev, __u16 mgmt_handle,
bdaddr_t *bdaddr, __u8 addr_type,
@@ -240,6 +288,7 @@ static int msft_le_monitor_advertisement_cb(struct hci_dev *hdev, u16 opcode,
handle_data->mgmt_handle = monitor->handle;
handle_data->msft_handle = rp->handle;
+ handle_data->cond_type = MSFT_MONITOR_ADVERTISEMENT_TYPE_PATTERN;
INIT_LIST_HEAD(&handle_data->list);
list_add(&handle_data->list, &msft->handle_map);
@@ -254,6 +303,70 @@ unlock:
return status;
}
+/* This function requires the caller holds hci_req_sync_lock */
+static void msft_remove_addr_filters_sync(struct hci_dev *hdev, u8 handle)
+{
+ struct msft_monitor_addr_filter_data *address_filter, *n;
+ struct msft_cp_le_cancel_monitor_advertisement cp;
+ struct msft_data *msft = hdev->msft_data;
+ struct list_head head;
+ struct sk_buff *skb;
+
+ INIT_LIST_HEAD(&head);
+
+ /* Cancel all corresponding address monitors */
+ mutex_lock(&msft->filter_lock);
+
+ list_for_each_entry_safe(address_filter, n, &msft->address_filters,
+ list) {
+ if (address_filter->pattern_handle != handle)
+ continue;
+
+ list_del(&address_filter->list);
+
+ /* Keep the address filter and let
+ * msft_add_address_filter_sync() remove and free the address
+ * filter.
+ */
+ if (address_filter->state == AF_STATE_ADDING) {
+ address_filter->state = AF_STATE_REMOVING;
+ continue;
+ }
+
+ /* Keep the address filter and let
+ * msft_cancel_address_filter_sync() remove and free the address
+ * filter
+ */
+ if (address_filter->state == AF_STATE_REMOVING)
+ continue;
+
+ list_add_tail(&address_filter->list, &head);
+ }
+
+ mutex_unlock(&msft->filter_lock);
+
+ list_for_each_entry_safe(address_filter, n, &head, list) {
+ list_del(&address_filter->list);
+
+ cp.sub_opcode = MSFT_OP_LE_CANCEL_MONITOR_ADVERTISEMENT;
+ cp.handle = address_filter->msft_handle;
+
+ skb = __hci_cmd_sync(hdev, hdev->msft_opcode, sizeof(cp), &cp,
+ HCI_CMD_TIMEOUT);
+ if (IS_ERR_OR_NULL(skb)) {
+ kfree(address_filter);
+ continue;
+ }
+
+ kfree_skb(skb);
+
+ bt_dev_dbg(hdev, "MSFT: Canceled device %pMR address filter",
+ &address_filter->bdaddr);
+
+ kfree(address_filter);
+ }
+}
+
static int msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
u16 opcode,
struct adv_monitor *monitor,
@@ -263,6 +376,7 @@ static int msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
struct msft_monitor_advertisement_handle_data *handle_data;
struct msft_data *msft = hdev->msft_data;
int status = 0;
+ u8 msft_handle;
rp = (struct msft_rp_le_cancel_monitor_advertisement *)skb->data;
if (skb->len < sizeof(*rp)) {
@@ -293,11 +407,17 @@ static int msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
NULL, 0, false);
}
+ msft_handle = handle_data->msft_handle;
+
list_del(&handle_data->list);
kfree(handle_data);
- }
- hci_dev_unlock(hdev);
+ hci_dev_unlock(hdev);
+
+ msft_remove_addr_filters_sync(hdev, msft_handle);
+ } else {
+ hci_dev_unlock(hdev);
+ }
done:
return status;
@@ -394,12 +514,14 @@ static int msft_add_monitor_sync(struct hci_dev *hdev,
{
struct msft_cp_le_monitor_advertisement *cp;
struct msft_le_monitor_advertisement_pattern_data *pattern_data;
+ struct msft_monitor_advertisement_handle_data *handle_data;
struct msft_le_monitor_advertisement_pattern *pattern;
struct adv_pattern *entry;
size_t total_size = sizeof(*cp) + sizeof(*pattern_data);
ptrdiff_t offset = 0;
u8 pattern_count = 0;
struct sk_buff *skb;
+ int err;
if (!msft_monitor_pattern_valid(monitor))
return -EINVAL;
@@ -436,16 +558,31 @@ static int msft_add_monitor_sync(struct hci_dev *hdev,
skb = __hci_cmd_sync(hdev, hdev->msft_opcode, total_size, cp,
HCI_CMD_TIMEOUT);
- kfree(cp);
if (IS_ERR_OR_NULL(skb)) {
- if (!skb)
- return -EIO;
- return PTR_ERR(skb);
+ err = PTR_ERR(skb);
+ goto out_free;
}
- return msft_le_monitor_advertisement_cb(hdev, hdev->msft_opcode,
- monitor, skb);
+ err = msft_le_monitor_advertisement_cb(hdev, hdev->msft_opcode,
+ monitor, skb);
+ if (err)
+ goto out_free;
+
+ handle_data = msft_find_handle_data(hdev, monitor->handle, true);
+ if (!handle_data) {
+ err = -ENODATA;
+ goto out_free;
+ }
+
+ handle_data->rssi_high = cp->rssi_high;
+ handle_data->rssi_low = cp->rssi_low;
+ handle_data->rssi_low_interval = cp->rssi_low_interval;
+ handle_data->rssi_sampling_period = cp->rssi_sampling_period;
+
+out_free:
+ kfree(cp);
+ return err;
}
/* This function requires the caller holds hci_req_sync_lock */
@@ -538,6 +675,7 @@ void msft_do_close(struct hci_dev *hdev)
{
struct msft_data *msft = hdev->msft_data;
struct msft_monitor_advertisement_handle_data *handle_data, *tmp;
+ struct msft_monitor_addr_filter_data *address_filter, *n;
struct adv_monitor *monitor;
if (!msft)
@@ -559,6 +697,14 @@ void msft_do_close(struct hci_dev *hdev)
kfree(handle_data);
}
+ mutex_lock(&msft->filter_lock);
+ list_for_each_entry_safe(address_filter, n, &msft->address_filters,
+ list) {
+ list_del(&address_filter->list);
+ kfree(address_filter);
+ }
+ mutex_unlock(&msft->filter_lock);
+
hci_dev_lock(hdev);
/* Clear any devices that are being monitored and notify device lost */
@@ -568,6 +714,49 @@ void msft_do_close(struct hci_dev *hdev)
hci_dev_unlock(hdev);
}
+static int msft_cancel_address_filter_sync(struct hci_dev *hdev, void *data)
+{
+ struct msft_monitor_addr_filter_data *address_filter = data;
+ struct msft_cp_le_cancel_monitor_advertisement cp;
+ struct msft_data *msft = hdev->msft_data;
+ struct sk_buff *skb;
+ int err = 0;
+
+ if (!msft) {
+ bt_dev_err(hdev, "MSFT: msft data is freed");
+ return -EINVAL;
+ }
+
+ /* The address filter has been removed by hci dev close */
+ if (!test_bit(HCI_UP, &hdev->flags))
+ return 0;
+
+ mutex_lock(&msft->filter_lock);
+ list_del(&address_filter->list);
+ mutex_unlock(&msft->filter_lock);
+
+ cp.sub_opcode = MSFT_OP_LE_CANCEL_MONITOR_ADVERTISEMENT;
+ cp.handle = address_filter->msft_handle;
+
+ skb = __hci_cmd_sync(hdev, hdev->msft_opcode, sizeof(cp), &cp,
+ HCI_CMD_TIMEOUT);
+ if (IS_ERR_OR_NULL(skb)) {
+ bt_dev_err(hdev, "MSFT: Failed to cancel address (%pMR) filter",
+ &address_filter->bdaddr);
+ err = -EIO;
+ goto done;
+ }
+ kfree_skb(skb);
+
+ bt_dev_dbg(hdev, "MSFT: Canceled device %pMR address filter",
+ &address_filter->bdaddr);
+
+done:
+ kfree(address_filter);
+
+ return err;
+}
+
void msft_register(struct hci_dev *hdev)
{
struct msft_data *msft = NULL;
@@ -581,7 +770,9 @@ void msft_register(struct hci_dev *hdev)
}
INIT_LIST_HEAD(&msft->handle_map);
+ INIT_LIST_HEAD(&msft->address_filters);
hdev->msft_data = msft;
+ mutex_init(&msft->filter_lock);
}
void msft_unregister(struct hci_dev *hdev)
@@ -596,6 +787,7 @@ void msft_unregister(struct hci_dev *hdev)
hdev->msft_data = NULL;
kfree(msft->evt_prefix);
+ mutex_destroy(&msft->filter_lock);
kfree(msft);
}
@@ -645,11 +837,149 @@ static void *msft_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
return data;
}
+static int msft_add_address_filter_sync(struct hci_dev *hdev, void *data)
+{
+ struct msft_monitor_addr_filter_data *address_filter = data;
+ struct msft_rp_le_monitor_advertisement *rp;
+ struct msft_cp_le_monitor_advertisement *cp;
+ struct msft_data *msft = hdev->msft_data;
+ struct sk_buff *skb = NULL;
+ bool remove = false;
+ size_t size;
+
+ if (!msft) {
+ bt_dev_err(hdev, "MSFT: msft data is freed");
+ return -EINVAL;
+ }
+
+ /* The address filter has been removed by hci dev close */
+ if (!test_bit(HCI_UP, &hdev->flags))
+ return -ENODEV;
+
+ /* We are safe to use the address filter from now on.
+ * msft_monitor_device_evt() wouldn't delete this filter because it's
+ * not been added by now.
+ * And all other functions that requiring hci_req_sync_lock wouldn't
+ * touch this filter before this func completes because it's protected
+ * by hci_req_sync_lock.
+ */
+
+ if (address_filter->state == AF_STATE_REMOVING) {
+ mutex_lock(&msft->filter_lock);
+ list_del(&address_filter->list);
+ mutex_unlock(&msft->filter_lock);
+ kfree(address_filter);
+ return 0;
+ }
+
+ size = sizeof(*cp) +
+ sizeof(address_filter->addr_type) +
+ sizeof(address_filter->bdaddr);
+ cp = kzalloc(size, GFP_KERNEL);
+ if (!cp) {
+ bt_dev_err(hdev, "MSFT: Alloc cmd param err");
+ remove = true;
+ goto done;
+ }
+ cp->sub_opcode = MSFT_OP_LE_MONITOR_ADVERTISEMENT;
+ cp->rssi_high = address_filter->rssi_high;
+ cp->rssi_low = address_filter->rssi_low;
+ cp->rssi_low_interval = address_filter->rssi_low_interval;
+ cp->rssi_sampling_period = address_filter->rssi_sampling_period;
+ cp->cond_type = MSFT_MONITOR_ADVERTISEMENT_TYPE_ADDR;
+ cp->data[0] = address_filter->addr_type;
+ memcpy(&cp->data[1], &address_filter->bdaddr,
+ sizeof(address_filter->bdaddr));
+
+ skb = __hci_cmd_sync(hdev, hdev->msft_opcode, size, cp,
+ HCI_CMD_TIMEOUT);
+ if (IS_ERR_OR_NULL(skb)) {
+ bt_dev_err(hdev, "Failed to enable address %pMR filter",
+ &address_filter->bdaddr);
+ skb = NULL;
+ remove = true;
+ goto done;
+ }
+
+ rp = skb_pull_data(skb, sizeof(*rp));
+ if (!rp || rp->sub_opcode != MSFT_OP_LE_MONITOR_ADVERTISEMENT ||
+ rp->status)
+ remove = true;
+
+done:
+ mutex_lock(&msft->filter_lock);
+
+ if (remove) {
+ bt_dev_warn(hdev, "MSFT: Remove address (%pMR) filter",
+ &address_filter->bdaddr);
+ list_del(&address_filter->list);
+ kfree(address_filter);
+ } else {
+ address_filter->state = AF_STATE_ADDED;
+ address_filter->msft_handle = rp->handle;
+ bt_dev_dbg(hdev, "MSFT: Address %pMR filter enabled",
+ &address_filter->bdaddr);
+ }
+ mutex_unlock(&msft->filter_lock);
+
+ kfree_skb(skb);
+
+ return 0;
+}
+
+/* This function requires the caller holds msft->filter_lock */
+static struct msft_monitor_addr_filter_data *msft_add_address_filter
+ (struct hci_dev *hdev, u8 addr_type, bdaddr_t *bdaddr,
+ struct msft_monitor_advertisement_handle_data *handle_data)
+{
+ struct msft_monitor_addr_filter_data *address_filter = NULL;
+ struct msft_data *msft = hdev->msft_data;
+ int err;
+
+ address_filter = kzalloc(sizeof(*address_filter), GFP_KERNEL);
+ if (!address_filter)
+ return NULL;
+
+ address_filter->state = AF_STATE_ADDING;
+ address_filter->msft_handle = 0xff;
+ address_filter->pattern_handle = handle_data->msft_handle;
+ address_filter->mgmt_handle = handle_data->mgmt_handle;
+ address_filter->rssi_high = handle_data->rssi_high;
+ address_filter->rssi_low = handle_data->rssi_low;
+ address_filter->rssi_low_interval = handle_data->rssi_low_interval;
+ address_filter->rssi_sampling_period = handle_data->rssi_sampling_period;
+ address_filter->addr_type = addr_type;
+ bacpy(&address_filter->bdaddr, bdaddr);
+
+ /* With the above AF_STATE_ADDING, duplicated address filter can be
+ * avoided when receiving monitor device event (found/lost) frequently
+ * for the same device.
+ */
+ list_add_tail(&address_filter->list, &msft->address_filters);
+
+ err = hci_cmd_sync_queue(hdev, msft_add_address_filter_sync,
+ address_filter, NULL);
+ if (err < 0) {
+ bt_dev_err(hdev, "MSFT: Add address %pMR filter err", bdaddr);
+ list_del(&address_filter->list);
+ kfree(address_filter);
+ return NULL;
+ }
+
+ bt_dev_dbg(hdev, "MSFT: Add device %pMR address filter",
+ &address_filter->bdaddr);
+
+ return address_filter;
+}
+
/* This function requires the caller holds hdev->lock */
static void msft_monitor_device_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
+ struct msft_monitor_addr_filter_data *n, *address_filter = NULL;
struct msft_ev_le_monitor_device *ev;
struct msft_monitor_advertisement_handle_data *handle_data;
+ struct msft_data *msft = hdev->msft_data;
+ u16 mgmt_handle = 0xffff;
u8 addr_type;
ev = msft_skb_pull(hdev, skb, MSFT_EV_LE_MONITOR_DEVICE, sizeof(*ev));
@@ -662,9 +992,53 @@ static void msft_monitor_device_evt(struct hci_dev *hdev, struct sk_buff *skb)
ev->monitor_state, &ev->bdaddr);
handle_data = msft_find_handle_data(hdev, ev->monitor_handle, false);
- if (!handle_data)
+
+ if (!test_bit(HCI_QUIRK_USE_MSFT_EXT_ADDRESS_FILTER, &hdev->quirks)) {
+ if (!handle_data)
+ return;
+ mgmt_handle = handle_data->mgmt_handle;
+ goto report_state;
+ }
+
+ if (handle_data) {
+ /* Don't report any device found/lost event from pattern
+ * monitors. Pattern monitor always has its address filters for
+ * tracking devices.
+ */
+
+ address_filter = msft_find_address_data(hdev, ev->addr_type,
+ &ev->bdaddr,
+ handle_data->msft_handle);
+ if (address_filter)
+ return;
+
+ if (ev->monitor_state && handle_data->cond_type ==
+ MSFT_MONITOR_ADVERTISEMENT_TYPE_PATTERN)
+ msft_add_address_filter(hdev, ev->addr_type,
+ &ev->bdaddr, handle_data);
+
return;
+ }
+ /* This device event is not from pattern monitor.
+ * Report it if there is a corresponding address_filter for it.
+ */
+ list_for_each_entry(n, &msft->address_filters, list) {
+ if (n->state == AF_STATE_ADDED &&
+ n->msft_handle == ev->monitor_handle) {
+ mgmt_handle = n->mgmt_handle;
+ address_filter = n;
+ break;
+ }
+ }
+
+ if (!address_filter) {
+ bt_dev_warn(hdev, "MSFT: Unexpected device event %pMR, %u, %u",
+ &ev->bdaddr, ev->monitor_handle, ev->monitor_state);
+ return;
+ }
+
+report_state:
switch (ev->addr_type) {
case ADDR_LE_DEV_PUBLIC:
addr_type = BDADDR_LE_PUBLIC;
@@ -681,12 +1055,18 @@ static void msft_monitor_device_evt(struct hci_dev *hdev, struct sk_buff *skb)
return;
}
- if (ev->monitor_state)
- msft_device_found(hdev, &ev->bdaddr, addr_type,
- handle_data->mgmt_handle);
- else
- msft_device_lost(hdev, &ev->bdaddr, addr_type,
- handle_data->mgmt_handle);
+ if (ev->monitor_state) {
+ msft_device_found(hdev, &ev->bdaddr, addr_type, mgmt_handle);
+ } else {
+ if (address_filter && address_filter->state == AF_STATE_ADDED) {
+ address_filter->state = AF_STATE_REMOVING;
+ hci_cmd_sync_queue(hdev,
+ msft_cancel_address_filter_sync,
+ address_filter,
+ NULL);
+ }
+ msft_device_lost(hdev, &ev->bdaddr, addr_type, mgmt_handle);
+ }
}
void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb)
@@ -724,7 +1104,9 @@ void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb)
switch (*evt) {
case MSFT_EV_LE_MONITOR_DEVICE:
+ mutex_lock(&msft->filter_lock);
msft_monitor_device_evt(hdev, skb);
+ mutex_unlock(&msft->filter_lock);
break;
default:
generated by cgit (git 2.34.1) at 2024-06-13 20:45:13 +0000