cmdpkt.h

T-kernel 的extension源代码

/*
 *----------------------------------------------------------------------
 *    T-Kernel / Standard Extension
 *
 *    Copyright (C) 2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel / Standard Extension is distributed 
 *      under the T-License for T-Kernel / Standard Extension.
 *----------------------------------------------------------------------
 *
 *    Version:   1.00.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/11.
 *
 *----------------------------------------------------------------------
 */

/*
 *	cmdpkt.h (file)
 *
 *	File management
 *	Command packet format
 */

#ifndef _FM_CMDPKT_H_
#define _FM_CMDPKT_H_

#include "filemgr.h"
#include <sys/syscall.h>
#include <extension/sys/segment.h>
#include <extension/sys/tkse_ssid.h>
#include <extension/sys/svc/iffile.h>


/*
 * Service function number
 */
typedef enum {
	/* Initialize/End the file system. */
	FM_INIT_FN			= (INT)(0x80010000U | FM_SVC),
	FM_FINISH_FN			= (INT)(0x80020000U | FM_SVC),

	/* Call the manager service. */
	FM_STARTUP_FN			= (INT)(0x80030100U | FM_SVC),
	FM_CLEANUP_FN			= (INT)(0x80040100U | FM_SVC),
	FM_BREAK_FN			= (INT)(0x80050100U | FM_SVC),

	/* Service command between file systems for internal use. */
	FMI_GetFileInfo_FN		= (INT)(0x80100400U | FM_SVC),
	FMI_ChangeLinkFileName_FN	= (INT)(0x80110200U | FM_SVC),
	FMI_SetWorkFile_FN		= (INT)(0x80120200U | FM_SVC),

	/* Forced termination of command */
	FMI_BreakSysCall_FN		= (INT)0xffffffffU
} FmFunctionNumber;

/*
 * Work area in the command packet.
 */
typedef struct FmWorkSpace {
	PINFO		*pinfo;		/* Management information of request process. */
	RNO		rdvno;		/* Request accept rendezvous number */

	LINK		lnk;		/* Link for forwarding */
	TC		*pathp;		/* Path pointer for forwarding */
} FmWorkSpace;

/*
 * File management command packet
 */
typedef struct FmCmdPkt {
	SyscallCmdPacket	cmd;
	FmWorkSpace		wrk;
} FmCmdPkt;

/*
 * Rendezvous port attribute for packet passing
 */
#define FmPortAttr	/*(T_CPOR)*/{0, (TA_TPRI), sizeof(VP), sizeof(VP), "fmport"}
IMPORT	T_CPOR		fmPortAttr;

/*
 * Rendezvous port ID for forwarding directions
 *	Do not forward when NoForward.
 *	Forward to the port of the manager task when ForwardMgr.
 *	Forward to the port of the specified ID otherwise.
 */
typedef	ID	FwdID;

#define	NoForward		((FwdID)(InvalidID))	/* Show that it is not forwarded. */
#define	ForwardMgr		((FwdID)(InvalidID - 1))	/* Forward to the manager task. */
#define	WaitRequest		((FwdID)(InvalidID - 2))	/* Go into indeterminate waiting. */

/*
 * TRUE when forwarding request from a file system task.
 */

#define	isCmdForward(pkt)	( (pkt)->wrk.lnk.fs_name[0] != 0 )

#define	resetCmdForward(pkt)	( (pkt)->wrk.lnk.fs_name[0] = (TC)0 )

/*
 * Waiting time and semaphore attribute for synchronous execution control flag.
 */
#define	SyncExecFlagAttr	/*(T_CSEM)*/{0, (TA_TFIFO), 1, 1, "syncexec"}
#define	SyncExecWait		( (TMO)10 )		/* Millisecond */


#include "accmode.h"
#include "filedes.h"

/*
 * Argument packet of the service function
 */
typedef struct {
	PINFO		*pinfo;
} FM_STARTUP_PARA;

typedef struct {
	PINFO		*pinfo;
} FM_CLEANUP_PARA;

typedef struct {
	ID		tskid;
} FM_BREAK_PARA;

typedef struct {
	LINK		*lnk;
	TC		*fname;
	STIME		*ctime;
	FileAccMode	*amode;
} FMI_GetFileInfo_PARA;

typedef struct {
	LINK		*lnk;
	TC		*fname;
} FMI_ChangeLinkFileName_PARA;

typedef struct {
	LINK		*lnk;
	PINFO		*pinfo;
} FMI_SetWorkFile_PARA;


IMPORT ER	fmDefineEntries( BOOL StartUp );
IMPORT ER	fmCallMgrTask( FmCmdPkt *pkt, SyscallPattern ptn );
IMPORT ER	fmForwardMgrTask( RNO rdvno, FmCmdPkt *pkt );
IMPORT ER	fmcCallFsTask( ID port, FmCmdPkt *pkt );
IMPORT ER	fmForwardFsTask( ID port, RNO rdvno, FmCmdPkt *pkt );

/*
 * Service command between file systems for internal use.
 * Entry for calling
 */
IMPORT ER	fmIGetFileInfo( LINK *lnk, FileName fname,
				STIME *ctime, FileAccMode *amode );
IMPORT ER	fmIChangeLinkFileName( LINK *lnk, FileName fname );
IMPORT ER	fmISetWorkFile( LINK *lnk, PINFO *pinfo );
IMPORT ER	fmcICloseFile( struct FD *fd );

#endif