Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-09-28 05:26:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

[FASTFAT]

Browse source 
Implement some kind of volume dismount in FastFAT (ie, implement VfatDismountVolume())

This is not fully perfect situation, but it does most of the job (+ leaking a few things). So far, this is not dramatic as its main use is for 1st stage. This will have to be improved later on.

CORE-8732 #comment Can you retest please?

svn path=/trunk/; revision=65173
This commit is contained in:
Pierre Schweitzer 2014-11-01 20:19:52 +00:00
parent 2f120e9e6d
commit c1bbc436cb
1 changed files with 61 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

63
reactos/drivers/filesystems/fastfat/fsctl.c
View file

@ -909,18 +909,77 @@ VfatDismountVolume(
PVFAT_IRP_CONTEXT IrpContext)
{
PDEVICE_EXTENSION DeviceExt;
PLIST_ENTRY NextEntry;
PVFATFCB Fcb;
DPRINT1("VfatDismountVolume(%p)\n", IrpContext);
DeviceExt = IrpContext->DeviceExt;
/* We HAVE to be locked. Windows also allows dismount with no lock
* but we're here mainly for 1st stage, so KISS
*/
if (!(DeviceExt->Flags & VCB_VOLUME_LOCKED))
{
return STATUS_ACCESS_DENIED;
}
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
/* Race condition? */
if (DeviceExt->Flags & VCB_DISMOUNT_PENDING)
{
return STATUS_VOLUME_DISMOUNTED;
}
/* Notify we'll dismount. Pass that point there's no reason we fail */
FsRtlNotifyVolumeEvent(IrpContext->Stack->FileObject, FSRTL_VOLUME_DISMOUNT);
ExAcquireResourceExclusiveLite(&DeviceExt->FatResource, TRUE);
/* Browse all the available FCBs first, and force data writing to disk */
for (NextEntry = DeviceExt->FcbListHead.Flink;
NextEntry != &DeviceExt->FcbListHead;
NextEntry = NextEntry->Flink)
{
Fcb = CONTAINING_RECORD(NextEntry, VFATFCB, FcbListEntry);
ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
ExAcquireResourceExclusiveLite(&Fcb->PagingIoResource, TRUE);
if (Fcb->FileObject)
{
if (Fcb->Flags & FCB_IS_DIRTY)
{
VfatUpdateEntry(Fcb);
}
CcPurgeCacheSection(Fcb->FileObject->SectionObjectPointer, NULL, 0, FALSE);
CcUninitializeCacheMap(Fcb->FileObject, &Fcb->RFCB.FileSize, NULL);
}
ExReleaseResourceLite(&Fcb->PagingIoResource);
ExReleaseResourceLite(&Fcb->MainResource);
}
/* Rebrowse the FCB in order to free them now */
while (!IsListEmpty(&DeviceExt->FcbListHead))
{
NextEntry = RemoveHeadList(&DeviceExt->FcbListHead);
Fcb = CONTAINING_RECORD(NextEntry, VFATFCB, FcbListEntry);
vfatDestroyFCB(Fcb);
}
/* Mark we're being dismounted */
DeviceExt->Flags |= VCB_DISMOUNT_PENDING;
IrpContext->DeviceObject->Vpb->Flags &= ~VPB_MOUNTED;
ExReleaseResourceLite(&DeviceExt->FatResource);
/* Release a few resources and quit, we're done */
ExDeleteResourceLite(&DeviceExt->DirResource);
ExDeleteResourceLite(&DeviceExt->FatResource);
ObDereferenceObject(DeviceExt->FATFileObject);
return STATUS_SUCCESS;
}
/*