/**
* send a command to a sync server and wait for a response.
*
* @param[in] state pointer to sync client handle
* @param[in] com command object
* @param[out] res response object
*
* @return operation status
* @retval SYNC_OK success
* @retval SYNC_COM_ERROR communications error
* @retval SYNC_BAD_COMMAND server did not recognize command code
*
* @note this routine merely handles error processing; SYNC_ask_internal()
* handles the low-level details of communicating with the SYNC server.
*
* @see SYNC_ask_internal
*/
afs_int32
SYNC_ask(SYNC_client_state * state, SYNC_command * com, SYNC_response * res)
{
int tries;
afs_uint32 now, timeout, code=SYNC_OK;
if (state->fatal_error) {
return SYNC_COM_ERROR;
}
if (state->fd == -1) {
SYNC_connect(state);
}
if (state->fd == -1) {
state->fatal_error = 1;
return SYNC_COM_ERROR;
}
#ifdef AFS_DEMAND_ATTACH_FS
com->hdr.flags |= SYNC_FLAG_DAFS_EXTENSIONS;
#endif
now = FT_ApproxTime();
timeout = now + state->hard_timeout;
for (tries = 0;
(tries <= state->retry_limit) && (now <= timeout);
tries++, now = FT_ApproxTime()) {
code = SYNC_ask_internal(state, com, res);
if (code == SYNC_OK) {
break;
} else if (code == SYNC_BAD_COMMAND) {
Log("SYNC_ask: protocol mismatch on circuit '%s'; make sure "
"fileserver, volserver, salvageserver and salvager are same "
"version\n", state->proto_name);
break;
} else if ((code == SYNC_COM_ERROR) && (tries < state->retry_limit)) {
Log("SYNC_ask: protocol communications failure on circuit '%s'; "
"attempting reconnect to server\n", state->proto_name);
SYNC_reconnect(state);
/* try again */
} else {
/*
* unknown (probably protocol-specific) response code, pass it up to
* the caller, and let them deal with it
*/
break;
}
}
if (code == SYNC_COM_ERROR) {
Log("SYNC_ask: fatal protocol error on circuit '%s'; disabling sync "
"protocol until next server restart\n",
state->proto_name);
state->fatal_error = 1;
}
return code;
}
int
FSYNC_clientChildProcReconnect(void)
{
return SYNC_reconnect(&fssync_state);
}
int
SALVSYNC_clientReconnect(void)
{
return SYNC_reconnect(&salvsync_client_state);
}
