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Bluetooth: Add return parameter to cmd_complete callbacks 

The cmd_complete callbacks for pending mgmt commands may fail e.g. in
the case of memory allocation. Previously this error would be caught and
returned to user space in the form of a failed write on the mgmt socket
(when the error happened in the mgmt command handler) but with the
introduction of the generic cmd_complete callback this information was
lost. This patch returns the feature by making cmd_complete callbacks
return int instead of void.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-12-19 22:26:03 +02:00 committed by Marcel Holtmann
parent 5a154e6f71
commit 9df7465351
1 changed files with 45 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
net/bluetooth/mgmt.c
View File

@ -139,7 +139,7 @@ struct pending_cmd {
size_t param_len;
struct sock *sk;
void *user_data;
void (*cmd_complete)(struct pending_cmd *cmd, u8 status);
int (*cmd_complete)(struct pending_cmd *cmd, u8 status);
};
/* HCI to MGMT error code conversion table */
@ -1487,16 +1487,16 @@ static void cmd_complete_rsp(struct pending_cmd *cmd, void *data)
cmd_status_rsp(cmd, data);
}
static void generic_cmd_complete(struct pending_cmd *cmd, u8 status)
static int generic_cmd_complete(struct pending_cmd *cmd, u8 status)
{
cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, cmd->param,
cmd->param_len);
return cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
cmd->param, cmd->param_len);
}
static void addr_cmd_complete(struct pending_cmd *cmd, u8 status)
static int addr_cmd_complete(struct pending_cmd *cmd, u8 status)
{
cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, cmd->param,
sizeof(struct mgmt_addr_info));
return cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, cmd->param,
sizeof(struct mgmt_addr_info));
}
static u8 mgmt_bredr_support(struct hci_dev *hdev)
@ -3098,16 +3098,17 @@ static struct pending_cmd *find_pairing(struct hci_conn *conn)
return NULL;
}
static void pairing_complete(struct pending_cmd *cmd, u8 status)
static int pairing_complete(struct pending_cmd *cmd, u8 status)
{
struct mgmt_rp_pair_device rp;
struct hci_conn *conn = cmd->user_data;
int err;
bacpy(&rp.addr.bdaddr, &conn->dst);
rp.addr.type = link_to_bdaddr(conn->type, conn->dst_type);
cmd_complete(cmd->sk, cmd->index, MGMT_OP_PAIR_DEVICE, status,
&rp, sizeof(rp));
err = cmd_complete(cmd->sk, cmd->index, MGMT_OP_PAIR_DEVICE, status,
&rp, sizeof(rp));
/* So we don't get further callbacks for this connection */
conn->connect_cfm_cb = NULL;
@ -3122,6 +3123,8 @@ static void pairing_complete(struct pending_cmd *cmd, u8 status)
clear_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags);
hci_conn_put(conn);
return err;
}
void mgmt_smp_complete(struct hci_conn *conn, bool complete)
@ -3947,9 +3950,10 @@ failed:
return err;
}
static void service_discovery_cmd_complete(struct pending_cmd *cmd, u8 status)
static int service_discovery_cmd_complete(struct pending_cmd *cmd, u8 status)
{
cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, cmd->param, 1);
return cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
cmd->param, 1);
}
static int start_service_discovery(struct sock *sk, struct hci_dev *hdev,
@ -5091,10 +5095,11 @@ static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
return err;
}
static void conn_info_cmd_complete(struct pending_cmd *cmd, u8 status)
static int conn_info_cmd_complete(struct pending_cmd *cmd, u8 status)
{
struct hci_conn *conn = cmd->user_data;
struct mgmt_rp_get_conn_info rp;
int err;
memcpy(&rp.addr, cmd->param, sizeof(rp.addr));
@ -5108,11 +5113,13 @@ static void conn_info_cmd_complete(struct pending_cmd *cmd, u8 status)
rp.max_tx_power = HCI_TX_POWER_INVALID;
}
cmd_complete(cmd->sk, cmd->index, MGMT_OP_GET_CONN_INFO, status,
&rp, sizeof(rp));
err = cmd_complete(cmd->sk, cmd->index, MGMT_OP_GET_CONN_INFO, status,
&rp, sizeof(rp));
hci_conn_drop(conn);
hci_conn_put(conn);
return err;
}
static void conn_info_refresh_complete(struct hci_dev *hdev, u8 hci_status)
@ -5286,11 +5293,12 @@ unlock:
return err;
}
static void clock_info_cmd_complete(struct pending_cmd *cmd, u8 status)
static int clock_info_cmd_complete(struct pending_cmd *cmd, u8 status)
{
struct hci_conn *conn = cmd->user_data;
struct mgmt_rp_get_clock_info rp;
struct hci_dev *hdev;
int err;
memset(&rp, 0, sizeof(rp));
memcpy(&rp.addr, &cmd->param, sizeof(rp.addr));
@ -5310,12 +5318,15 @@ static void clock_info_cmd_complete(struct pending_cmd *cmd, u8 status)
}
complete:
cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, &rp, sizeof(rp));
err = cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, &rp,
sizeof(rp));
if (conn) {
hci_conn_drop(conn);
hci_conn_put(conn);
}
return err;
}
static void get_clock_info_complete(struct hci_dev *hdev, u8 status)
@ -5552,8 +5563,8 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
if (cp->addr.type == BDADDR_BREDR) {
/* Only incoming connections action is supported for now */
if (cp->action != 0x01) {
err = 0;
cmd->cmd_complete(cmd, MGMT_STATUS_INVALID_PARAMS);
err = cmd->cmd_complete(cmd,
MGMT_STATUS_INVALID_PARAMS);
mgmt_pending_remove(cmd);
goto unlock;
}
@ -5585,8 +5596,7 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
*/
if (hci_conn_params_set(&req, &cp->addr.bdaddr, addr_type,
auto_conn) < 0) {
err = 0;
cmd->cmd_complete(cmd, MGMT_STATUS_FAILED);
err = cmd->cmd_complete(cmd, MGMT_STATUS_FAILED);
mgmt_pending_remove(cmd);
goto unlock;
}
@ -5599,10 +5609,8 @@ added:
/* ENODATA means no HCI commands were needed (e.g. if
* the adapter is powered off).
*/
if (err == -ENODATA) {
cmd->cmd_complete(cmd, MGMT_STATUS_SUCCESS);
err = 0;
}
if (err == -ENODATA)
err = cmd->cmd_complete(cmd, MGMT_STATUS_SUCCESS);
mgmt_pending_remove(cmd);
}
@ -5668,8 +5676,8 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
u8 addr_type;
if (!bdaddr_type_is_valid(cp->addr.type)) {
err = 0;
cmd->cmd_complete(cmd, MGMT_STATUS_INVALID_PARAMS);
err = cmd->cmd_complete(cmd,
MGMT_STATUS_INVALID_PARAMS);
mgmt_pending_remove(cmd);
goto unlock;
}
@ -5679,9 +5687,8 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
&cp->addr.bdaddr,
cp->addr.type);
if (err) {
err = 0;
cmd->cmd_complete(cmd,
MGMT_STATUS_INVALID_PARAMS);
err = cmd->cmd_complete(cmd,
MGMT_STATUS_INVALID_PARAMS);
mgmt_pending_remove(cmd);
goto unlock;
}
@ -5701,15 +5708,15 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
addr_type);
if (!params) {
err = 0;
cmd->cmd_complete(cmd, MGMT_STATUS_INVALID_PARAMS);
err = cmd->cmd_complete(cmd,
MGMT_STATUS_INVALID_PARAMS);
mgmt_pending_remove(cmd);
goto unlock;
}
if (params->auto_connect == HCI_AUTO_CONN_DISABLED) {
err = 0;
cmd->cmd_complete(cmd, MGMT_STATUS_INVALID_PARAMS);
err = cmd->cmd_complete(cmd,
MGMT_STATUS_INVALID_PARAMS);
mgmt_pending_remove(cmd);
goto unlock;
}
@ -5725,8 +5732,8 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
struct bdaddr_list *b, *btmp;
if (cp->addr.type) {
err = 0;
cmd->cmd_complete(cmd, MGMT_STATUS_INVALID_PARAMS);
err = cmd->cmd_complete(cmd,
MGMT_STATUS_INVALID_PARAMS);
mgmt_pending_remove(cmd);
goto unlock;
}
@ -5759,10 +5766,8 @@ complete:
/* ENODATA means no HCI commands were needed (e.g. if
* the adapter is powered off).
*/
if (err == -ENODATA) {
cmd->cmd_complete(cmd, MGMT_STATUS_SUCCESS);
err = 0;
}
if (err == -ENODATA)
err = cmd->cmd_complete(cmd, MGMT_STATUS_SUCCESS);
mgmt_pending_remove(cmd);
}