int mars_send_dent_list(struct mars_socket *sock, struct list_head *anchor)
{
struct list_head *tmp;
struct mars_dent *dent;
int status = 0;
for (tmp = anchor->next; tmp != anchor; tmp = tmp->next) {
dent = container_of(tmp, struct mars_dent, dent_link);
status = mars_send_struct(sock, dent, mars_dent_meta);
if (status < 0)
break;
}
if (status >= 0) { // send EOR
status = mars_send_struct(sock, NULL, mars_dent_meta);
}
return status;
}
static int _request_info(struct client_output *output)
{
struct mars_cmd cmd = {
.cmd_code = CMD_GETINFO,
};
int status;
MARS_DBG("\n");
status = mars_send_struct(&output->socket, &cmd, mars_cmd_meta);
if (unlikely(status < 0)) {
MARS_DBG("send of getinfo failed, status = %d\n", status);
}
return status;
}
static int _connect(struct client_output *output, const char *str)
{
struct sockaddr_storage sockaddr = {};
int status;
if (unlikely(!output->path)) {
output->path = brick_strdup(str);
status = -ENOMEM;
if (!output->path) {
MARS_DBG("no mem\n");
goto done;
}
status = -EINVAL;
output->host = strchr(output->path, '@');
if (!output->host) {
brick_string_free(output->path);
output->path = NULL;
MARS_ERR("parameter string '%s' contains no remote specifier with '@'-syntax\n", str);
goto done;
}
*output->host++ = '\0';
}
if (unlikely(output->receiver.thread)) {
MARS_WRN("receiver thread unexpectedly not dead\n");
_kill_thread(&output->receiver, "receiver");
}
status = mars_create_sockaddr(&sockaddr, output->host);
if (unlikely(status < 0)) {
MARS_DBG("no sockaddr, status = %d\n", status);
goto done;
}
status = mars_create_socket(&output->socket, &sockaddr, false);
if (unlikely(status < 0)) {
MARS_DBG("no socket, status = %d\n", status);
goto really_done;
}
output->socket.s_shutdown_on_err = true;
output->receiver.thread = brick_thread_create(receiver_thread, output, "mars_receiver%d", thread_count++);
if (unlikely(!output->receiver.thread)) {
MARS_ERR("cannot start receiver thread, status = %d\n", status);
status = -ENOENT;
goto done;
}
{
struct mars_cmd cmd = {
.cmd_code = CMD_CONNECT,
.cmd_str1 = output->path,
};
status = mars_send_struct(&output->socket, &cmd, mars_cmd_meta);
if (unlikely(status < 0)) {
MARS_DBG("send of connect failed, status = %d\n", status);
goto done;
}
}
if (status >= 0) {
status = _request_info(output);
}
done:
if (status < 0) {
MARS_INF("cannot connect to remote host '%s' (status = %d) -- retrying\n", output->host ? output->host : "NULL", status);
_kill_socket(output);
}
really_done:
return status;
}
////////////////// own brick / input / output operations //////////////////
static int client_get_info(struct client_output *output, struct mars_info *info)
{
int status;
output->got_info = false;
output->get_info = true;
wake_up_interruptible(&output->event);
wait_event_interruptible_timeout(output->info_event, output->got_info, 60 * HZ);
status = -EIO;
if (output->got_info && info) {
memcpy(info, &output->info, sizeof(*info));
status = 0;
}
//done:
return status;
}