cmcb.c File Reference

#include "ext2fs.h"

Include dependency graph for cmcb.c:

Go to the source code of this file.

Macros
#define	CMCB_DEBUG_LEVEL   DL_NVR

Functions
BOOLEAN NTAPI	Ext2AcquireForLazyWrite (IN PVOID Context, IN BOOLEAN Wait)
VOID NTAPI	Ext2ReleaseFromLazyWrite (IN PVOID Context)
BOOLEAN NTAPI	Ext2AcquireForReadAhead (IN PVOID Context, IN BOOLEAN Wait)
VOID NTAPI	Ext2ReleaseFromReadAhead (IN PVOID Context)
BOOLEAN NTAPI	Ext2NoOpAcquire (IN PVOID Fcb, IN BOOLEAN Wait)
VOID NTAPI	Ext2NoOpRelease (IN PVOID Fcb)

Variables
PEXT2_GLOBAL	Ext2Global

Macro Definition Documentation

CMCB_DEBUG_LEVEL

#define CMCB_DEBUG_LEVEL   DL_NVR

Definition at line 20 of file cmcb.c.

Function Documentation

Ext2AcquireForLazyWrite()

BOOLEAN NTAPI Ext2AcquireForLazyWrite	(	IN PVOID	Context,
		IN BOOLEAN	Wait
	)

Definition at line 23 of file cmcb.c.

{
    //
    // On a readonly filesystem this function still has to exist but it
    // doesn't need to do anything.

    PEXT2_FCB    Fcb;

    Fcb = (PEXT2_FCB) Context;
    ASSERT(Fcb != NULL);
    ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
           (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
#if EXT2_DEBUG
    DEBUG(CMCB_DEBUG_LEVEL, ("Ext2AcquireForLazyWrite: %s %s Fcb=%p\n",
                             Ext2GetCurrentProcessName(), "ACQUIRE_FOR_LAZY_WRITE", Fcb));
#endif
    if (!ExAcquireResourceExclusiveLite(Fcb->Header.Resource, Wait)) {
        return FALSE;
    }

    ASSERT(Fcb->LazyWriterThread == NULL);
    Fcb->LazyWriterThread = PsGetCurrentThread();

    ASSERT(IoGetTopLevelIrp() == NULL);
    IoSetTopLevelIrp((PIRP)FSRTL_CACHE_TOP_LEVEL_IRP);

    return TRUE;
}

Referenced by DriverEntry().

Ext2AcquireForReadAhead()

BOOLEAN NTAPI Ext2AcquireForReadAhead	(	IN PVOID	Context,
		IN BOOLEAN	Wait
	)

Definition at line 80 of file cmcb.c.

{
    PEXT2_FCB    Fcb = (PEXT2_FCB) Context;

    ASSERT(Fcb != NULL);
    ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
           (Fcb->Identifier.Size == sizeof(EXT2_FCB)));

    DEBUG(CMCB_DEBUG_LEVEL, ("Ext2AcquireForReadAhead: i=%xh Fcb=%p\n",
                             Fcb->Mcb->Inode.i_ino, Fcb));

    if (!ExAcquireResourceSharedLite(Fcb->Header.Resource, Wait))
        return FALSE;
    ASSERT(IoGetTopLevelIrp() == NULL);
    IoSetTopLevelIrp((PIRP)FSRTL_CACHE_TOP_LEVEL_IRP);

    return TRUE;
}

Referenced by DriverEntry().

Ext2NoOpAcquire()

BOOLEAN NTAPI Ext2NoOpAcquire	(	IN PVOID	Fcb,
		IN BOOLEAN	Wait
	)

Definition at line 118 of file cmcb.c.

{
    ASSERT(IoGetTopLevelIrp() == NULL);
    IoSetTopLevelIrp((PIRP)FSRTL_CACHE_TOP_LEVEL_IRP);
    return TRUE;
}

Referenced by DriverEntry().

Ext2NoOpRelease()

VOID NTAPI Ext2NoOpRelease

(

IN PVOID

Fcb

)

Definition at line 129 of file cmcb.c.

{
    ASSERT(IoGetTopLevelIrp() == (PIRP)FSRTL_CACHE_TOP_LEVEL_IRP);
    IoSetTopLevelIrp( NULL );

    return;
}

Referenced by DriverEntry().

Ext2ReleaseFromLazyWrite()

VOID NTAPI Ext2ReleaseFromLazyWrite

(

IN PVOID

Context

)

Definition at line 55 of file cmcb.c.

{
    //
    // On a readonly filesystem this function still has to exist but it
    // doesn't need to do anything.
    PEXT2_FCB Fcb = (PEXT2_FCB) Context;

    ASSERT(Fcb != NULL);

    ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
           (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
#if EXT2_DEBUG
    DEBUG(CMCB_DEBUG_LEVEL, ( "Ext2ReleaseFromLazyWrite: %s %s Fcb=%p\n",
                              Ext2GetCurrentProcessName(), "RELEASE_FROM_LAZY_WRITE", Fcb));
#endif
    ASSERT(Fcb->LazyWriterThread == PsGetCurrentThread());
    Fcb->LazyWriterThread = NULL;

    ExReleaseResourceLite(Fcb->Header.Resource);

    ASSERT(IoGetTopLevelIrp() == (PIRP)FSRTL_CACHE_TOP_LEVEL_IRP);
    IoSetTopLevelIrp( NULL );
}

Referenced by DriverEntry().

Ext2ReleaseFromReadAhead()

VOID NTAPI Ext2ReleaseFromReadAhead

(

IN PVOID

Context

)

Definition at line 101 of file cmcb.c.

{
    PEXT2_FCB Fcb = (PEXT2_FCB) Context;

    ASSERT(Fcb != NULL);

    ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
           (Fcb->Identifier.Size == sizeof(EXT2_FCB)));

    DEBUG(CMCB_DEBUG_LEVEL, ("Ext2ReleaseFromReadAhead: i=%xh Fcb=%p\n",
                             Fcb->Mcb->Inode.i_ino, Fcb));

    IoSetTopLevelIrp(NULL);
    ExReleaseResourceLite(Fcb->Header.Resource);
}

Referenced by DriverEntry().

Variable Documentation

Ext2Global

PEXT2_GLOBAL Ext2Global

Definition at line 16 of file init.c.