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[FASTFAT]

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When un/locking a volume, also handle VPB state

svn path=/trunk/; revision=74047
This commit is contained in:
Pierre Schweitzer 2017-03-04 11:34:13 +00:00
parent a2bf0e2023
commit 3676af8656
1 changed files with 11 additions and 0 deletions
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11
reactos/drivers/filesystems/fastfat/fsctl.c
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@ -1058,12 +1058,14 @@ VfatLockOrUnlockVolume(
PFILE_OBJECT FileObject; PFILE_OBJECT FileObject;
PDEVICE_EXTENSION DeviceExt; PDEVICE_EXTENSION DeviceExt;
PVFATFCB Fcb; PVFATFCB Fcb;
PVPB Vpb;
DPRINT("VfatLockOrUnlockVolume(%p, %d)\n", IrpContext, Lock); DPRINT("VfatLockOrUnlockVolume(%p, %d)\n", IrpContext, Lock);
DeviceExt = IrpContext->DeviceExt; DeviceExt = IrpContext->DeviceExt;
FileObject = IrpContext->FileObject; FileObject = IrpContext->FileObject;
Fcb = FileObject->FsContext; Fcb = FileObject->FsContext;
Vpb = DeviceExt->FATFileObject->Vpb;
/* Only allow locking with the volume open */ /* Only allow locking with the volume open */
if (!BooleanFlagOn(Fcb->Flags, FCB_IS_VOLUME)) if (!BooleanFlagOn(Fcb->Flags, FCB_IS_VOLUME))
@ -1078,6 +1080,13 @@ VfatLockOrUnlockVolume(
return STATUS_ACCESS_DENIED; return STATUS_ACCESS_DENIED;
} }
/* Bail out if it's already in the demanded state */
if ((BooleanFlagOn(Vpb->Flags, VPB_LOCKED) && Lock) ||
(!BooleanFlagOn(Vpb->Flags, VPB_LOCKED) && !Lock))
{
return STATUS_ACCESS_DENIED;
}
/* Deny locking if we're not alone */ /* Deny locking if we're not alone */
if (Lock && DeviceExt->OpenHandleCount != 1) if (Lock && DeviceExt->OpenHandleCount != 1)
{ {
@ -1088,10 +1097,12 @@ VfatLockOrUnlockVolume(
if (Lock) if (Lock)
{ {
DeviceExt->Flags |= VCB_VOLUME_LOCKED; DeviceExt->Flags |= VCB_VOLUME_LOCKED;
Vpb->Flags |= VPB_LOCKED;
} }
else else
{ {
DeviceExt->Flags &= ~VCB_VOLUME_LOCKED; DeviceExt->Flags &= ~VCB_VOLUME_LOCKED;
Vpb->Flags &= ~VPB_LOCKED;
} }
return STATUS_SUCCESS; return STATUS_SUCCESS;