From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
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@xxxxxxxxx>
---
net/bluetooth/mgmt.c | 85 +++++++++++++++++++++++++++-------------------------
1 file changed, 45 insertions(+), 40 deletions(-)
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index ec7c0ec3d8d3..3d2f7ad1e655 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -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);
}
--
2.1.0
--
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