From 248733e87d503e75624a2e95e241f51334fdd320 Mon Sep 17 00:00:00 2001 From: Kiran K Date: Tue, 7 Sep 2021 15:42:40 +0530 Subject: Bluetooth: Allow querying of supported offload codecs over SCO socket Add BT_CODEC option for getsockopt systemcall to get the details of offload codecs supported over SCO socket Signed-off-by: Kiran K Reviewed-by: Chethan T N Reviewed-by: Srivatsa Ravishankar Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/sco.c | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) (limited to 'net/bluetooth/sco.c') diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index 6e047e178c0a..df8cba0c9cc4 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -972,6 +972,12 @@ static int sco_sock_getsockopt(struct socket *sock, int level, int optname, struct bt_voice voice; u32 phys; int pkt_status; + int buf_len; + struct codec_list *c; + u8 num_codecs, i, __user *ptr; + struct hci_dev *hdev; + struct hci_codec_caps *caps; + struct bt_codec codec; BT_DBG("sk %p", sk); @@ -1036,6 +1042,101 @@ static int sco_sock_getsockopt(struct socket *sock, int level, int optname, err = -EFAULT; break; + case BT_CODEC: + num_codecs = 0; + buf_len = 0; + + hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR); + if (!hdev) { + err = -EBADFD; + break; + } + + if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) { + hci_dev_put(hdev); + err = -EOPNOTSUPP; + break; + } + + if (!hdev->get_data_path_id) { + hci_dev_put(hdev); + err = -EOPNOTSUPP; + break; + } + + /* find total buffer size required to copy codec + caps */ + hci_dev_lock(hdev); + list_for_each_entry(c, &hdev->local_codecs, list) { + if (c->transport != HCI_TRANSPORT_SCO_ESCO) + continue; + num_codecs++; + for (i = 0, caps = c->caps; i < c->num_caps; i++) { + buf_len += 1 + caps->len; + caps = (void *)&caps->data[caps->len]; + } + buf_len += sizeof(struct bt_codec); + } + hci_dev_unlock(hdev); + + buf_len += sizeof(struct bt_codecs); + if (buf_len > len) { + hci_dev_put(hdev); + err = -ENOBUFS; + break; + } + ptr = optval; + + if (put_user(num_codecs, ptr)) { + hci_dev_put(hdev); + err = -EFAULT; + break; + } + ptr += sizeof(num_codecs); + + /* Iterate all the codecs supported over SCO and populate + * codec data + */ + hci_dev_lock(hdev); + list_for_each_entry(c, &hdev->local_codecs, list) { + if (c->transport != HCI_TRANSPORT_SCO_ESCO) + continue; + + codec.id = c->id; + codec.cid = c->cid; + codec.vid = c->vid; + err = hdev->get_data_path_id(hdev, &codec.data_path); + if (err < 0) + break; + codec.num_caps = c->num_caps; + if (copy_to_user(ptr, &codec, sizeof(codec))) { + err = -EFAULT; + break; + } + ptr += sizeof(codec); + + /* find codec capabilities data length */ + len = 0; + for (i = 0, caps = c->caps; i < c->num_caps; i++) { + len += 1 + caps->len; + caps = (void *)&caps->data[caps->len]; + } + + /* copy codec capabilities data */ + if (len && copy_to_user(ptr, c->caps, len)) { + err = -EFAULT; + break; + } + ptr += len; + } + + if (!err && put_user(buf_len, optlen)) + err = -EFAULT; + + hci_dev_unlock(hdev); + hci_dev_put(hdev); + + break; + default: err = -ENOPROTOOPT; break; -- cgit v1.2.3-59-g8ed1b