static cs_error_t sam_parent_reply_send (
cs_error_t err,
int parent_fd_in,
int parent_fd_out)
{
char reply;
if (err == CS_OK) {
reply = SAM_REPLY_OK;
if (sam_safe_write (parent_fd_out, &reply, sizeof (reply)) != sizeof (reply)) {
err = CS_ERR_LIBRARY;
goto error_reply;
}
return (CS_OK);
}
error_reply:
reply = SAM_REPLY_ERROR;
if (sam_safe_write (parent_fd_out, &reply, sizeof (reply)) != sizeof (reply)) {
return (CS_ERR_LIBRARY);
}
if (sam_safe_write (parent_fd_out, &err, sizeof (err)) != sizeof (err)) {
return (CS_ERR_LIBRARY);
}
return (err);
}
cs_error_t sam_warn_signal_set (int warn_signal)
{
char command;
cs_error_t err;
if (sam_internal_data.internal_status != SAM_INTERNAL_STATUS_INITIALIZED &&
sam_internal_data.internal_status != SAM_INTERNAL_STATUS_REGISTERED &&
sam_internal_data.internal_status != SAM_INTERNAL_STATUS_STARTED) {
return (CS_ERR_BAD_HANDLE);
}
pthread_mutex_lock (&sam_internal_data.lock);
if (sam_internal_data.am_i_child) {
/*
* We are child so we must send data to parent
*/
command = SAM_COMMAND_WARN_SIGNAL_SET;
if (sam_safe_write (sam_internal_data.child_fd_out, &command, sizeof (command)) != sizeof (command)) {
err = CS_ERR_LIBRARY;
goto error_unlock;
}
if (sam_safe_write (sam_internal_data.child_fd_out, &warn_signal, sizeof (warn_signal)) !=
sizeof (warn_signal)) {
err = CS_ERR_LIBRARY;
goto error_unlock;
}
/*
* And wait for reply
*/
if ((err = sam_read_reply (sam_internal_data.child_fd_in)) != CS_OK) {
goto error_unlock;
}
}
/*
* We are parent or we received OK reply from parent -> do required action
*/
sam_internal_data.warn_signal = warn_signal;
pthread_mutex_unlock (&sam_internal_data.lock);
return (CS_OK);
error_unlock:
pthread_mutex_unlock (&sam_internal_data.lock);
return (err);
}
cs_error_t sam_start (void)
{
char command;
cs_error_t err;
sam_recovery_policy_t recpol;
if (sam_internal_data.internal_status != SAM_INTERNAL_STATUS_REGISTERED) {
return (CS_ERR_BAD_HANDLE);
}
recpol = sam_internal_data.recovery_policy;
if (recpol & SAM_RECOVERY_POLICY_QUORUM || recpol & SAM_RECOVERY_POLICY_CONFDB) {
pthread_mutex_lock (&sam_internal_data.lock);
}
command = SAM_COMMAND_START;
if (sam_safe_write (sam_internal_data.child_fd_out, &command, sizeof (command)) != sizeof (command)) {
if (recpol & SAM_RECOVERY_POLICY_QUORUM || recpol & SAM_RECOVERY_POLICY_CONFDB) {
pthread_mutex_unlock (&sam_internal_data.lock);
}
return (CS_ERR_LIBRARY);
}
if (recpol & SAM_RECOVERY_POLICY_QUORUM || recpol & SAM_RECOVERY_POLICY_CONFDB) {
/*
* Wait for parent reply
*/
if ((err = sam_read_reply (sam_internal_data.child_fd_in)) != CS_OK) {
pthread_mutex_unlock (&sam_internal_data.lock);
return (err);
}
pthread_mutex_unlock (&sam_internal_data.lock);
}
if (sam_internal_data.hc_callback)
if (sam_safe_write (sam_internal_data.cb_wpipe_fd, &command, sizeof (command)) != sizeof (command))
return (CS_ERR_LIBRARY);
sam_internal_data.internal_status = SAM_INTERNAL_STATUS_STARTED;
return (CS_OK);
}
cs_error_t sam_stop (void)
{
char command;
if (sam_internal_data.internal_status != SAM_INTERNAL_STATUS_STARTED) {
return (CS_ERR_BAD_HANDLE);
}
command = SAM_COMMAND_STOP;
if (sam_safe_write (sam_internal_data.parent_fd, &command, 1) == -1)
return (CS_ERR_LIBRARY);
if (sam_internal_data.hc_callback)
if (sam_safe_write (sam_internal_data.cb_wpipe_fd, &command, 1) == -1)
return (CS_ERR_LIBRARY);
sam_internal_data.internal_status = SAM_INTERNAL_STATUS_REGISTERED;
return (CS_OK);
}
cs_error_t sam_hc_send (void)
{
char command;
if (sam_internal_data.internal_status != SAM_INTERNAL_STATUS_STARTED) {
return (CS_ERR_BAD_HANDLE);
}
command = SAM_COMMAND_HB;
if (sam_safe_write (sam_internal_data.parent_fd, &command, 1) == -1)
return (CS_ERR_LIBRARY);
return (CS_OK);
}
cs_error_t sam_hc_send (void)
{
char command;
if (sam_internal_data.internal_status != SAM_INTERNAL_STATUS_STARTED) {
return (CS_ERR_BAD_HANDLE);
}
command = SAM_COMMAND_HB;
if (sam_safe_write (sam_internal_data.child_fd_out, &command, sizeof (command)) != sizeof (command))
return (CS_ERR_LIBRARY);
return (CS_OK);
}
cs_error_t sam_mark_failed (void)
{
char command;
if (sam_internal_data.internal_status != SAM_INTERNAL_STATUS_STARTED &&
sam_internal_data.internal_status != SAM_INTERNAL_STATUS_REGISTERED) {
return (CS_ERR_BAD_HANDLE);
}
if (!(sam_internal_data.recovery_policy & SAM_RECOVERY_POLICY_CONFDB)) {
return (CS_ERR_INVALID_PARAM);
}
command = SAM_COMMAND_MARK_FAILED;
if (sam_safe_write (sam_internal_data.child_fd_out, &command, sizeof (command)) != sizeof (command))
return (CS_ERR_LIBRARY);
return (CS_OK);
}
cs_error_t sam_data_store (
const void *data,
size_t size)
{
cs_error_t err;
char command;
char *new_data;
if (sam_internal_data.internal_status != SAM_INTERNAL_STATUS_INITIALIZED &&
sam_internal_data.internal_status != SAM_INTERNAL_STATUS_REGISTERED &&
sam_internal_data.internal_status != SAM_INTERNAL_STATUS_STARTED) {
return (CS_ERR_BAD_HANDLE);
}
if (data == NULL) {
size = 0;
}
pthread_mutex_lock (&sam_internal_data.lock);
if (sam_internal_data.am_i_child) {
/*
* We are child so we must send data to parent
*/
command = SAM_COMMAND_DATA_STORE;
if (sam_safe_write (sam_internal_data.child_fd_out, &command, sizeof (command)) != sizeof (command)) {
err = CS_ERR_LIBRARY;
goto error_unlock;
}
if (sam_safe_write (sam_internal_data.child_fd_out, &size, sizeof (size)) != sizeof (size)) {
err = CS_ERR_LIBRARY;
goto error_unlock;
}
if (data != NULL && sam_safe_write (sam_internal_data.child_fd_out, data, size) != size) {
err = CS_ERR_LIBRARY;
goto error_unlock;
}
/*
* And wait for reply
*/
if ((err = sam_read_reply (sam_internal_data.child_fd_in)) != CS_OK) {
goto error_unlock;
}
}
/*
* We are parent or we received OK reply from parent -> do required action
*/
if (data == NULL) {
free (sam_internal_data.user_data);
sam_internal_data.user_data = NULL;
sam_internal_data.user_data_allocated = 0;
sam_internal_data.user_data_size = 0;
} else {
if (sam_internal_data.user_data_allocated < size) {
if ((new_data = realloc (sam_internal_data.user_data, size)) == NULL) {
err = CS_ERR_NO_MEMORY;
goto error_unlock;
}
sam_internal_data.user_data_allocated = size;
} else {
new_data = sam_internal_data.user_data;
}
sam_internal_data.user_data = new_data;
sam_internal_data.user_data_size = size;
memcpy (sam_internal_data.user_data, data, size);
}
pthread_mutex_unlock (&sam_internal_data.lock);
return (CS_OK);
error_unlock:
pthread_mutex_unlock (&sam_internal_data.lock);
return (err);
}
