fs84lowlayer.c

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/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 9

u8 Fs84_09AddedLayerToVol( t_fsVolStruct * pp_VolStruct, u16 vp_NbrCmds, void * pp_LayerContext)
{
   t_InterLayer * 	pl_Interlayer = (t_InterLayer *) pp_VolStruct->p_LayerCommunication;
   t_FunctionAndLevel * pl_FctLevelTab = NIL;
   u8			vl_Level = pl_Interlayer->v_NbrLayers;
   u8 			vl_NbrMaxLevelLayers = s_LowLayerDataBaseStruct.v_NbrMaxLevelLayers;
   u8 			vl_Index;


    /* Updates number of commands of lower layer */
    if ( vl_Level != vl_NbrMaxLevelLayers) pl_Interlayer[vl_Level].v_NbrCommands = vp_NbrCmds;

    /* Update interlayer pointer in interlayer table */
    pl_Interlayer[vl_Level].p_LayerContext = pp_LayerContext;


    /* Creates the function/level table and place its address in layer table */
    if ( vp_NbrCmds != 0 ) pl_FctLevelTab = pl_Interlayer[vl_Level].p_TabFctLevel = 
		( t_FunctionAndLevel *) MC_FS_GET_MEMORY(sizeof(t_FunctionAndLevel) 
									*
								 vp_NbrCmds );

    /* Increment number of layers for the volume for all levels in interlayer table */
    for (  vl_Index = 0; vl_Index< vl_NbrMaxLevelLayers; vl_Index++ )
		 	pl_Interlayer[vl_Index].v_NbrLayers ++;

    /* Fill all function addresses with FS_FCT_NOT_EXIST */
    for ( vl_Index = 0 ; vl_Index < vp_NbrCmds; vl_Index++ )
    {
	pl_FctLevelTab[vl_Index].p_Fct = (void (*)(void*,void*)) FS_FCT_NOT_EXIST;
    }

    /* Return current level of layer */
    return(vl_Level);
}


/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_10SetCommand()	  	 	          	      */
/* Object :    Set a new command for the new layer			      */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	t_fsVolStruct * pp_VolStruct: structure of the volume under mounting  */
/*	u16 vp_CommandId : Identifier of the command			      */
/* 	void (*pp_Fct)(void*,void*): Address of function to call for 	      */
/*					this command			      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*	none								      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*	Added a new command to the layer under mounting			      */
/*	The command is placed in the command/level table in index equal to    */
/*		the command ID.					              */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 10

void Fs84_10SetCommand( t_fsVolStruct * pp_VolStruct, u16 vp_CommandId, void (*pp_Fct)(void*,void*))
{
   t_InterLayer * 	pl_Interlayer = (t_InterLayer *) pp_VolStruct->p_LayerCommunication;
   t_FunctionAndLevel * pl_CurrFctLevelTab;
   u8			vl_Level = pl_Interlayer->v_NbrLayers - 1;

    /* Point on current layer function/level table */
    pl_CurrFctLevelTab = pl_Interlayer[vl_Level].p_TabFctLevel; 

    /* Verify if not out of table */
    if ( vp_CommandId >= pl_Interlayer[vl_Level].v_NbrCommands )
		 FS_EXCPTHANDLER( FS_BLOCKED , FS_ERR_BAD_OPER_ID );

    /* Place function address in table and update level */
    pl_CurrFctLevelTab[vp_CommandId].p_Fct = pp_Fct;
    pl_CurrFctLevelTab[vp_CommandId].v_Level = vl_Level;
}



/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_11SetCmdToLowLayerCommand()	          	      */
/* Object :    Set a new command to a command implemented in the just 	      */
/*				lower layer				      */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	t_fsVolStruct * pp_VolStruct: structure of the volume under mounting  */
/*	u16 vp_CommandId : Identifier of the command			      */
/* 	u16 vp_LowLayerCommandId: Identifier of the just lower layer's	      */ 
/*					command			 	      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*	none								      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*	Added a new command to the layer under mounting			      */
/*	The command characteristics ( addess of the function, level )	      */
/*		are copied from a just under-layer command		      */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 11

void Fs84_11SetCmdToLowLayerCommand(t_fsVolStruct * pp_VolStruct, u16 vp_CommandId, 
						u16 vp_LowLayerCommandId)
{
   t_InterLayer * 	pl_Interlayer = ( t_InterLayer *) pp_VolStruct->p_LayerCommunication;
   t_FunctionAndLevel * pl_CurrFctLevelTab;
   t_FunctionAndLevel * pl_LowerFctLevelTab;
   u8			vl_Level = pl_Interlayer->v_NbrLayers - 1;

    /* Verify if a lower layer exist */
    if ( vl_Level == 0  ) FS_EXCPTHANDLER( FS_BLOCKED , FS_EXCPT_NO_LOWER_LAYER );

    /* Point on current layer function/level table */
    pl_CurrFctLevelTab = pl_Interlayer[vl_Level].p_TabFctLevel; 

    /* Point on lower layer function/level table */
    pl_LowerFctLevelTab = pl_Interlayer[vl_Level-1].p_TabFctLevel; 

    /* Verify if command id not out of table */
    if ( vp_CommandId >= pl_Interlayer[vl_Level].v_NbrCommands )
		FS_EXCPTHANDLER( FS_BLOCKED , FS_ERR_BAD_OPER_ID );

    /* Verify if low layer command id not out of table */
    if ( vp_LowLayerCommandId >= pl_Interlayer[vl_Level-1].v_NbrCommands )
		FS_EXCPTHANDLER( FS_BLOCKED , FS_ERR_BAD_OPER_ID );

    /* Copy lower layer structure in current layer's structure */
    pl_CurrFctLevelTab[vp_CommandId].p_Fct = pl_LowerFctLevelTab[vp_LowLayerCommandId].p_Fct;
    pl_CurrFctLevelTab[vp_CommandId].v_Level = pl_LowerFctLevelTab[vp_LowLayerCommandId].v_Level;

}


/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_12MountVolume()	 	         	      */
/* Object :    Mount a new volume to the FS			 	      */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	t_fsVolStruct * pp_VolStruct: structure of the volume under mounting  */
/*	ascii * pp_VolName : Name of the new mounted volume		      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*	s32: Status of init runned after mount				      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*	Mounts a new volume to the FS, the volume structure is inserted       */
/*		mounted volume list					      */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 12

s32 Fs84_12MountVolume( void * pp_Volume, const fsVolName * pp_VolName )
{
    /* Creates communication structure */		   
    t_LayerCommunication s_LayerCom; 

    s32 vl_Status = FS_OK;

    /* Mount the FS layer to volume ( 0 functions, no context to mount ) */
    /* Fs84_09AddedLayerToVol( ( t_fsVolStruct *) pp_Volume, 0, NIL ); */

    /* Insert the volume sstructure in volume list */
    MC_FS_VD_INSERT_NEW_VOL( (( t_fsVolStruct *) pp_Volume)->v_VolID, (fsVolName*)pp_VolName,
				 ( t_fsVolStruct *)pp_Volume);

    /* Init thread on this communication structure */
    MC_FS_LL_THREAD_COMM_INIT( &s_LayerCom, 0);


    /* Set the interlayer table pointer */
    MC_FS_LL_SET_NEW_VOL(( t_fsVolStruct *) pp_Volume);
    
    /* Initialize lower layers */
    MC_FS_LL_INIT( &vl_Status);

    return(vl_Status);
}

/**/
/*P(***************************************************************************/
/* Procedure name : Fs84_13UnmountVolume()	 	         	      */
/* Object :    Unmount a mounted volume                                       */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*	ascii * pp_VolName : Name of the new mounted volume		      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*	s32: Status of init runned after mount				      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*	Unmounts a volume from the FS, the volume structure is released from the  */
/*		mounted volume list					      */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 13

s32 Fs84_13UnmountVolume(const fsVolName * pp_VolName )
{
    u16 vl_VolID;
    s32 vl_Status = FS_OK;
    t_fsVolStruct *pp_Vol;
    
    /* search for volume structure in volume list */
    pp_Vol = MC_FS_VD_SEARCH_VOL_BY_NAME((ascii *)pp_VolName, FSS_NAME_MAX);

    vl_VolID = MC_FS_VD_GET_VOL_ID(pp_Vol);

    /* Delete the volume structure from volume list */
    MC_FS_VD_DELETE_VOL(vl_VolID, pp_Vol);

    return(vl_Status);
}

#endif /* FSS_FTR */