Oracle^® Solaris Cluster Data Services Developer's Guide

xfnts_validate Method

The RGM calls the Validate method when a resource is created and when a cluster administrator updates the properties of the resource or its containing group. The RGM calls the Validate method before the creation or update is applied. A failure exit code from the method on any node causes the creation or update to be canceled.

The RGM calls Validate only when a cluster administrator changes resource or resource group properties or when a monitor sets the Status and Status_msg resource properties. The RGM does not call Validate when the RGM sets properties.

The RGM calls Validate with additional arguments to those that are passed to other methods, including the properties and values that are being updated. The call to scds_initialize() at the beginning of xfnts_validate parses all the arguments that the RGM passes to xfnts_validate and stores the information in the scds_handle argument. The subroutines that xfnts_validate calls make use of this information.

The xfnts_validate method calls svc_validate(), which verifies the following conditions:

• The Confdir_list property has been set for the resource and defines a single directory.

  scha_str_array_t *confdirs;
  confdirs = scds_get_ext_confdir_list(scds_handle);
  
  /* Return error if there is no confdir_list extension property */
  if (confdirs == NULL || confdirs->array_cnt != 1) {
  scds_syslog(LOG_ERR,
  "Property Confdir_list is not set properly.");
  return (1); /* Validation failure */
  }

• The directory that is specified by Confdir_list contains the fontserver.cfg file.

  (void) sprintf(xfnts_conf, "%s/fontserver.cfg", confdirs->str_array[0]);
  
  if (stat(xfnts_conf, &statbuf) != 0) {
  /*
  * suppress lint error because errno.h prototype
  * is missing void arg
  */
  scds_syslog(LOG_ERR,
  "Failed to access file <%s> : <%s>",
  xfnts_conf, strerror(errno));   /*lint !e746 */
  return (1);
  }

• The server daemon binary is accessible on the cluster node.

  if (stat("/usr/bin/xfs", &statbuf) != 0) {
  scds_syslog(LOG_ERR,
  "Cannot access XFS binary : <%s> ", strerror(errno));
  return (1);
  }

• The Port_list property specifies a single port.

  scds_port_list_t   *portlist;
  err = scds_get_port_list(scds_handle, &portlist);
  if (err != SCHA_ERR_NOERR) {
  scds_syslog(LOG_ERR,
  "Could not access property Port_list: %s.",
  scds_error_string(err));
  return (1); /* Validation Failure */
  }
  
  #ifdef TEST
  if (portlist->num_ports != 1) {
  scds_syslog(LOG_ERR,
  "Property Port_list must have only one value.");
  scds_free_port_list(portlist);
  return (1); /* Validation Failure */
  }
  #endif

• The resource group that contains the data service also contains at least one network address resource.

  scds_net_resource_list_t *snrlp;
  if ((err = scds_get_rs_hostnames(scds_handle, &snrlp))
  != SCHA_ERR_NOERR) {
  scds_syslog(LOG_ERR,
  "No network address resource in resource group: %s.",
  scds_error_string(err));
  return (1); /* Validation Failure */
  }
  
  /* Return an error if there are no network address resources */
  if (snrlp == NULL || snrlp->num_netresources == 0) {
  scds_syslog(LOG_ERR,
  "No network address resource in resource group.");
  rc = 1;
  goto finished;
  }

Before it returns, svc_validate() frees all allocated resources.

finished:
scds_free_net_list(snrlp);
scds_free_port_list(portlist);

return (rc); /* return result of validation */