Bluetooth: Add ACL MTU, available buffers and total buffers to hci_co…

…nn_info.

This provides userspace debugging tools access to ACL flow control state.

Signed-off-by: Nick Pelly <npelly@google.com>

include/net/bluetooth/hci.h

@@ -1184,6 +1184,9 @@ struct hci_conn_info {
  __u8 out;
  __u16 state;
  __u32 link_mode;
+ __u32 mtu;
+ __u32 cnt;
+ __u32 pkts;
 };
 
 struct hci_dev_req {

net/bluetooth/hci_conn.c

@@ -826,6 +826,15 @@ int hci_get_conn_list(void __user *arg)
  (ci + n)->out = c->out;
  (ci + n)->state = c->state;
  (ci + n)->link_mode = c->link_mode;
+ if (c->type == SCO_LINK) {
+ (ci + n)->mtu = hdev->sco_mtu;
+ (ci + n)->cnt = hdev->sco_cnt;
+ (ci + n)->pkts = hdev->sco_pkts;
+ } else {
+ (ci + n)->mtu = hdev->acl_mtu;
+ (ci + n)->cnt = hdev->acl_cnt;
+ (ci + n)->pkts = hdev->acl_pkts;
+ }
  if (++n >= req.conn_num)
  break;
  }
@@ -862,6 +871,15 @@ int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
  ci.out = conn->out;
  ci.state = conn->state;
  ci.link_mode = conn->link_mode;
+ if (req.type == SCO_LINK) {
+ ci.mtu = hdev->sco_mtu;
+ ci.cnt = hdev->sco_cnt;
+ ci.pkts = hdev->sco_pkts;
+ } else {
+ ci.mtu = hdev->acl_mtu;
+ ci.cnt = hdev->acl_cnt;
+ ci.pkts = hdev->acl_pkts;
+ }
  }
  hci_dev_unlock_bh(hdev);