unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

Bluetooth: hci_sync: Convert MGMT_OP_GET_CLOCK_INFO

Browse source 
Synchronous version of MGMT_OP_GET_CLOCK_INFO.

Signed-off-by: Brian Gix <brian.gix@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Brian Gix 2021-10-27 16:58:50 -07:00 committed by Marcel Holtmann
parent 2f2eb0c9de
commit 5a75013746
3 changed files with 62 additions and 74 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
include/net/bluetooth/hci_sync.h
View file

@ -70,6 +70,7 @@ int hci_update_passive_scan(struct hci_dev *hdev);
int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle);
int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type);
int hci_write_sc_support_sync(struct hci_dev *hdev, u8 val);
int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp);
int hci_write_fast_connectable_sync(struct hci_dev *hdev, bool enable);
int hci_update_scan_sync(struct hci_dev *hdev);

6
net/bluetooth/hci_sync.c
View file

@ -1318,6 +1318,12 @@ int hci_read_rssi_sync(struct hci_dev *hdev, __le16 handle)
sizeof(cp), &cp, HCI_CMD_TIMEOUT);
}
int hci_read_clock_sync(struct hci_dev *hdev, struct hci_cp_read_clock *cp)
{
return __hci_cmd_sync_status(hdev, HCI_OP_READ_CLOCK,
sizeof(*cp), cp, HCI_CMD_TIMEOUT);
}
int hci_read_tx_power_sync(struct hci_dev *hdev, __le16 handle, u8 type)
{
struct hci_cp_read_tx_power cp;

129
net/bluetooth/mgmt.c
View file

@ -927,13 +927,6 @@ static struct mgmt_pending_cmd *pending_find(u16 opcode, struct hci_dev *hdev)
return mgmt_pending_find(HCI_CHANNEL_CONTROL, opcode, hdev);
}
static struct mgmt_pending_cmd *pending_find_data(u16 opcode,
struct hci_dev *hdev,
const void *data)
{
return mgmt_pending_find_data(HCI_CHANNEL_CONTROL, opcode, hdev, data);
}
u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev)
{
struct mgmt_pending_cmd *cmd;
@ -6702,82 +6695,76 @@ static int get_conn_info(struct sock *sk, struct hci_dev *hdev, void *data,
return err;
}
static int clock_info_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
static void get_clock_info_complete(struct hci_dev *hdev, void *data, int err)
{
struct hci_conn *conn = cmd->user_data;
struct mgmt_pending_cmd *cmd = data;
struct mgmt_cp_get_clock_info *cp = cmd->param;
struct mgmt_rp_get_clock_info rp;
struct hci_dev *hdev;
int err;
struct hci_conn *conn = cmd->user_data;
u8 status = mgmt_status(err);
bt_dev_dbg(hdev, "err %d", err);
memset(&rp, 0, sizeof(rp));
memcpy(&rp.addr, cmd->param, sizeof(rp.addr));
bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
rp.addr.type = cp->addr.type;
if (status)
if (err)
goto complete;
hdev = hci_dev_get(cmd->index);
if (hdev) {
rp.local_clock = cpu_to_le32(hdev->clock);
hci_dev_put(hdev);
}
rp.local_clock = cpu_to_le32(hdev->clock);
if (conn) {
rp.piconet_clock = cpu_to_le32(conn->clock);
rp.accuracy = cpu_to_le16(conn->clock_accuracy);
hci_conn_drop(conn);
hci_conn_put(conn);
}
complete:
err = mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, &rp,
sizeof(rp));
mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, &rp,
sizeof(rp));
mgmt_pending_free(cmd);
}
static int get_clock_info_sync(struct hci_dev *hdev, void *data)
{
struct mgmt_pending_cmd *cmd = data;
struct mgmt_cp_get_clock_info *cp = cmd->param;
struct hci_cp_read_clock hci_cp;
struct hci_conn *conn = cmd->user_data;
int err;
memset(&hci_cp, 0, sizeof(hci_cp));
err = hci_read_clock_sync(hdev, &hci_cp);
if (conn) {
hci_conn_drop(conn);
hci_conn_put(conn);
/* Make sure connection still exists */
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
&cp->addr.bdaddr);
if (conn && conn == cmd->user_data &&
conn->state == BT_CONNECTED) {
hci_cp.handle = cpu_to_le16(conn->handle);
hci_cp.which = 0x01; /* Piconet clock */
err = hci_read_clock_sync(hdev, &hci_cp);
} else if (cmd->user_data) {
hci_conn_drop(cmd->user_data);
hci_conn_put(cmd->user_data);
cmd->user_data = NULL;
}
}
return err;
}
static void get_clock_info_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
struct hci_cp_read_clock *hci_cp;
struct mgmt_pending_cmd *cmd;
struct hci_conn *conn;
bt_dev_dbg(hdev, "status %u", status);
hci_dev_lock(hdev);
hci_cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
if (!hci_cp)
goto unlock;
if (hci_cp->which) {
u16 handle = __le16_to_cpu(hci_cp->handle);
conn = hci_conn_hash_lookup_handle(hdev, handle);
} else {
conn = NULL;
}
cmd = pending_find_data(MGMT_OP_GET_CLOCK_INFO, hdev, conn);
if (!cmd)
goto unlock;
cmd->cmd_complete(cmd, mgmt_status(status));
mgmt_pending_remove(cmd);
unlock:
hci_dev_unlock(hdev);
}
static int get_clock_info(struct sock *sk, struct hci_dev *hdev, void *data,
u16 len)
u16 len)
{
struct mgmt_cp_get_clock_info *cp = data;
struct mgmt_rp_get_clock_info rp;
struct hci_cp_read_clock hci_cp;
struct mgmt_pending_cmd *cmd;
struct hci_request req;
struct hci_conn *conn;
int err;
@ -6815,31 +6802,25 @@ static int get_clock_info(struct sock *sk, struct hci_dev *hdev, void *data,
conn = NULL;
}
cmd = mgmt_pending_add(sk, MGMT_OP_GET_CLOCK_INFO, hdev, data, len);
if (!cmd) {
cmd = mgmt_pending_new(sk, MGMT_OP_GET_CLOCK_INFO, hdev, data, len);
if (!cmd)
err = -ENOMEM;
goto unlock;
}
else
err = hci_cmd_sync_queue(hdev, get_clock_info_sync, cmd,
get_clock_info_complete);
cmd->cmd_complete = clock_info_cmd_complete;
if (err < 0) {
err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CLOCK_INFO,
MGMT_STATUS_FAILED, &rp, sizeof(rp));
hci_req_init(&req, hdev);
if (cmd)
mgmt_pending_free(cmd);
memset(&hci_cp, 0, sizeof(hci_cp));
hci_req_add(&req, HCI_OP_READ_CLOCK, sizeof(hci_cp), &hci_cp);
if (conn) {
} else if (conn) {
hci_conn_hold(conn);
cmd->user_data = hci_conn_get(conn);
hci_cp.handle = cpu_to_le16(conn->handle);
hci_cp.which = 0x01; /* Piconet clock */
hci_req_add(&req, HCI_OP_READ_CLOCK, sizeof(hci_cp), &hci_cp);
}
err = hci_req_run(&req, get_clock_info_complete);
if (err < 0)
mgmt_pending_remove(cmd);
unlock:
hci_dev_unlock(hdev);