NTSTATUS
Ext2WriteInode (
IN PEXT2_IRP_CONTEXT IrpContext,
IN PEXT2_VCB Vcb,
IN PEXT2_MCB Mcb,
IN ULONGLONG Offset,
IN PVOID Buffer,
IN ULONG Size,
IN BOOLEAN bDirectIo,
OUT PULONG BytesWritten
)
{
PEXT2_EXTENT Chain = NULL;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
__try {
if (BytesWritten) {
*BytesWritten = 0;
}
Status = Ext2BuildExtents (
IrpContext,
Vcb,
Mcb,
Offset,
Size,
S_ISDIR(Mcb->Inode.i_mode) ? FALSE : TRUE,
&Chain
);
if (!NT_SUCCESS(Status)) {
__leave;
}
if (Chain == NULL) {
Status = STATUS_SUCCESS;
__leave;
}
if (bDirectIo) {
ASSERT(IrpContext != NULL);
//
// We assume the offset is aligned.
//
Status = Ext2ReadWriteBlocks(
IrpContext,
Vcb,
Chain,
Size
);
} else {
PEXT2_EXTENT Extent;
for (Extent = Chain; Extent != NULL; Extent = Extent->Next) {
if ( !Ext2SaveBuffer(
IrpContext,
Vcb,
Extent->Lba,
Extent->Length,
(PVOID)((PUCHAR)Buffer + Extent->Offset)
)) {
__leave;
}
}
if (IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) {
DEBUG(DL_FLP, ("Ext2WriteInode is starting FlushingDpc...\n"));
Ext2StartFloppyFlushDpc(Vcb, NULL, NULL);
}
Status = STATUS_SUCCESS;
}
} __finally {
if (Chain) {
Ext2DestroyExtentChain(Chain);
}
if (NT_SUCCESS(Status) && BytesWritten) {
*BytesWritten = Size;
}
}
return Status;
}
NTSTATUS
Ext2WriteInode (
IN PEXT2_IRP_CONTEXT IrpContext,
IN PEXT2_VCB Vcb,
IN PEXT2_MCB Mcb,
IN ULONGLONG Offset,
IN PVOID Buffer,
IN ULONG Size,
IN BOOLEAN bDirectIo,
OUT PULONG dwRet
)
{
PEXT2_EXTENT Chain = NULL;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
BOOLEAN bAlloc = FALSE;
__try {
if (dwRet) {
*dwRet = 0;
}
/* For file/non pagingio, we support the allocation on writing. */
if (!IsFlagOn(Mcb->FileAttr, FILE_ATTRIBUTE_DIRECTORY)) {
if (!(IrpContext->Irp->Flags & IRP_PAGING_IO)) {
bAlloc = TRUE;
}
}
Status = Ext2BuildExtents (
IrpContext,
Vcb,
Mcb,
Offset,
Size,
bAlloc,
&Chain
);
if (!NT_SUCCESS(Status)) {
__leave;
}
if (Chain == NULL) {
Status = STATUS_SUCCESS;
__leave;
}
if (bDirectIo) {
ASSERT(IrpContext != NULL);
//
// We assume the offset is aligned.
//
Status = Ext2ReadWriteBlocks(
IrpContext,
Vcb,
Chain,
Size,
FALSE
);
} else {
PEXT2_EXTENT Extent;
for (Extent = Chain; Extent != NULL; Extent = Extent->Next) {
if ( !Ext2SaveBuffer(
IrpContext,
Vcb,
Extent->Lba,
Extent->Length,
(PVOID)((PUCHAR)Buffer + Extent->Offset)
)) {
__leave;
}
}
if (IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) {
DEBUG(DL_FLP, ("Ext2WriteInode is starting FlushingDpc...\n"));
Ext2StartFloppyFlushDpc(Vcb, NULL, NULL);
}
Status = STATUS_SUCCESS;
}
} __finally {
if (Chain) {
Ext2DestroyExtentChain(Chain);
}
if (NT_SUCCESS(Status)) {
if (dwRet) *dwRet = Size;
}
}
return Status;
}
