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device: Add ACTION_DELETE to prevent concurrent operations

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Delete needs to operate on the device, so no other actions are permitted
at the same time. And using the libfprint _sync methods does not
guard against reentrance.
This commit is contained in:
Benjamin Berg 2020-12-03 21:13:00 +01:00
parent c0ad5880a4
commit c5c81a2ea8
1 changed files with 29 additions and 0 deletions
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29
src/device.c
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@ -60,6 +60,7 @@ typedef enum {
ACTION_ENROLL,
ACTION_OPEN,
ACTION_CLOSE,
ACTION_DELETE,
} FprintDeviceAction;
typedef enum {
@ -908,6 +909,8 @@ static gboolean fprint_device_release (FprintDBusDevice *dbus_dev,
} else if (priv->current_action == ACTION_IDENTIFY ||
priv->current_action == ACTION_VERIFY) {
g_warning("Verification was in progress, stopping it");
} else if (priv->current_action == ACTION_DELETE) {
g_warning("Deletion was in progress, stopping it");
}
g_cancellable_cancel (priv->current_cancellable);
@ -1629,6 +1632,16 @@ static gboolean fprint_device_delete_enrolled_fingers (FprintDBusDevice *dbus_de
log_offending_client (invocation);
#endif
if (priv->current_action != ACTION_NONE) {
g_dbus_method_invocation_return_error_literal (invocation,
FPRINT_ERROR,
FPRINT_ERROR_ALREADY_IN_USE,
"Another operation is already in progress");
return TRUE;
}
priv->current_action = ACTION_DELETE;
if (!_fprint_device_check_claimed (rdev, invocation, &error)) {
/* Return error for anything but FPRINT_ERROR_CLAIM_DEVICE */
if (!g_error_matches (error, FPRINT_ERROR, FPRINT_ERROR_CLAIM_DEVICE)) {
@ -1657,6 +1670,8 @@ static gboolean fprint_device_delete_enrolled_fingers (FprintDBusDevice *dbus_de
if (!opened && fp_device_has_storage (priv->dev))
fp_device_close_sync (priv->dev, NULL, NULL);
priv->current_action = ACTION_NONE;
fprint_dbus_device_complete_delete_enrolled_fingers (dbus_dev,
invocation);
return TRUE;
@ -1675,9 +1690,23 @@ static gboolean fprint_device_delete_enrolled_fingers2 (FprintDBusDevice *dbus_d
return TRUE;
}
if (priv->current_action != ACTION_NONE) {
g_dbus_method_invocation_return_error_literal (invocation,
FPRINT_ERROR,
FPRINT_ERROR_ALREADY_IN_USE,
"Another operation is already in progress");
g_dbus_method_invocation_return_gerror (invocation, error);
return TRUE;
}
priv->current_action = ACTION_DELETE;
session = session_data_get (priv);
delete_enrolled_fingers (rdev, session->username);
priv->current_action = ACTION_NONE;
fprint_dbus_device_complete_delete_enrolled_fingers2 (dbus_dev,
invocation);
return TRUE;