/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 * 
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

#ifndef _xstat_fs_h_
#define	_xstat_fs_h_  1

/*------------------------------------------------------------------------
 * xstat_fs.h
 *
 * Interface to the AFS File Server extended statistics facility.  With
 * the routines defined here, the importer can gather extended statistics
 * from the given group of File Servers at regular intervals, or force
 * immediate collection.
 *
 *------------------------------------------------------------------------*/

#include <sys/types.h>			/*Basic system types*/
#ifndef	IPPROTO_IP
#include <netinet/in.h>			/*Internet definitions*/
#endif

#ifndef _netdb_h_
#define _netdb_h_
#include <netdb.h>			/*Network database library*/
#endif

#ifndef _socket_h_
#define _socket_h_
#include <sys/socket.h>			/*Socket definitions*/
#endif

#include <rx/rx.h>			/*Rx definitions*/
#include <afs/afsint.h>			/*AFS FileServer interface*/
#define FSINT_COMMON_XG			/* to allow the inclusion of
	xstat_cm.h with this file in an application. */
#include <afs/fs_stats.h>		/*AFS FileServer statistics interface*/


/*
 * ---------------------- Exported definitions ------------------------
 */
/*
 * Define the initialization flags used within the xstat_fs_Init() call.
 *	XSTAT_FS_INITFLAG_DEBUGGING	Turn debugging output on?
 *	XSTAT_FS_INITFLAG_ONE_SHOT	Do a one-shot collection?
 */
#define XSTAT_FS_INITFLAG_DEBUGGING	0x1
#define XSTAT_FS_INITFLAG_ONE_SHOT	0x2


/*
 * ----------------------- Exported structures ------------------------
 */
/*
 * Connection information per File Server host being probed.
 */
struct xstat_fs_ConnectionInfo {
    struct sockaddr_in skt;		/*Socket info*/
    struct rx_connection *rxconn;	/*Rx connection*/
    char hostName[256];			/*Computed hostname*/
};

/*
 * The results of a probe of one of the File Servers in the set being
 * watched.
 */
struct xstat_fs_ProbeResults {
    int probeNum;			   /*Probe number*/
    afs_int32 probeTime;			   /*Time probe initiated*/
    struct xstat_fs_ConnectionInfo *connP; /*Connection polled*/
    afs_int32 collectionNumber;		   /*Collection received*/
    AFS_CollData data;			   /*Ptr to data collected*/
    int probeOK;			   /*Latest probe successful?*/
};

/*
 * ------------------- Externally-visible variables -------------------
 */
extern int xstat_fs_numServers;		/*# connected servers*/
extern struct xstat_fs_ConnectionInfo
    *xstat_fs_ConnInfo;			/*Ptr to connections*/
extern int numCollections;		/*Num data collections*/
extern struct xstat_fs_ProbeResults
    xstat_fs_Results;			/*Latest probe results*/
extern char terminationEvent;		/*One-shot termination event*/

/*
 * ------------------------ Exported functions ------------------------
 */
extern int xstat_fs_Init();
    /*
     * Summary:
     *    Initialize the xstat_fs module: set up Rx connections to the
     *	  given set of File Servers, start up the probe and callback LWPs,
     *	  and associate the routine to be called when a probe completes.
     *	  Also, let it know which collections you're interested in.
     *
     * Args:
     *	  int a_numServers		    : Num. servers to connect.
     *	  struct sockaddr_in *a_socketArray : Array of server sockets.
     *	  int a_ProbeFreqInSecs		    : Probe frequency in seconds.
     *	  int (*a_ProbeHandler)()	    : Ptr to probe handler fcn.
     *	  int a_flags			    : Various flags.
     *	  int a_numCollections		    : Number of collections desired.
     *	  afs_int32 *a_collIDP		    : Ptr to collection IDs.
     *
     * Returns:
     *	  0 on success,
     *	  Error value otherwise.
     */

extern int xstat_fs_ForceProbeNow();
    /*
     * Summary:
     *    Force an immediate probe to the connected File Servers.
     *
     * Args:
     *	  None.
     *
     * Returns:
     *	  0 on success,
     *	  Error value otherwise.
     */

extern int xstat_fs_Cleanup();
    /*
     * Summary:
     *    Clean up our memory and connection state.
     *
     * Args:
     *	  int a_releaseMem : Should we free up malloc'ed areas?
     *
     * Returns:
     *	  0 on total success,
     *	  -1 if the module was never initialized, or there was a problem
     *		with the xstat_fs connection array.
     */

#endif /* _xstat_fs_h_ */
