Caching data is a driver property. I think you need no to care about it.
On 19.09.2013, at 2:26, David F. wrote:
> Hi,
>
> Regarding the sync() question. Does it actually do anything if I find all
> Simple File Systems, open up the volume, run a .Flush then close them?
> Thinking at that point any cached data, no matter who put it there whenever
> they put it there, should be flushed (the volume is shared?) Or would that
> do nothing if something else had the volume open and had uncached data?
>
> TIA!!
>
>
>
> On Mon, Sep 9, 2013 at 8:53 AM, Andrew Fish <af...@apple.com> wrote:
>
> On Sep 7, 2013, at 10:51 PM, Sergey Isakov <isakov...@bk.ru> wrote:
>
> > Ops, corrected
> >
> > On 08.09.2013, at 8:34, Sergey Isakov <isakov...@bk.ru> wrote:
> >
> >>
> >> On 08.09.2013, at 4:59, David F. <df7...@gmail.com> wrote:
> >>
> >>> Hi,
> >>>
> >>> is there a generic equivalent to something like sync() in Linux or do you
> >>> loop through block handles and issue
> >>> disconnectcontroller()/connectcontroller() or do the exclusive open then
> >>> connectcontroller().
> >>>
>
> Some of the protocols support syncing via the protocol like,
> EFI_FILE_PROTOCOL.Flush(). Disconnect also does a sync for that part of the
> device tree.
>
> >>>
> >>> Also in general, what is the difference between a "ControllerHandle" and
> >>> a "DriverHandle" in terms of getting handles.
>
> The DriverHandle is the handle associated with the device driver, and it
> contains the EFI Loaded Image Protocol. See chapter 12 UEFI 2.4.
>
> >>> In other words, If I have a block io protocol handle is that a
> >>> controller handle or a driver handle or some other handle? If you had a
> >>> end-device like a hd, how would you get the controller's handle (what
> >>> protocol do you locate for the parent for a controller) ???
> >>>
>
> In general the device paths are generic abstractions. From a bus driver point
> of view you just copy your parents device path and append a node that
> represents what your driver manages. So for example the partition driver is
> adding the HD(1,GPT,E223FF7F-F2DA-4DBB-B765-756F2D95B0FE,0x28,0x64000) node,
> but it just copies PcieRoot(0x0)/Pci(0x1F,0x2)/Sata(0x0,0x0,0x0) and does not
> need to understand anything about that path.
>
> Thanks,
>
> Andrew Fish
>
> >> No differences.
> >> There are handles with protocols and with DevicePathes
> >> PcieRoot(0x0)/
> > this is a bus
> >> PcieRoot(0x0)/Pci(0x1F,0x2)/
> > this is SATA controller
> >> PcieRoot(0x0)/Pci(0x1F,0x2)/Sata(0x0,0x0,0x0)/
> > this is HDD
> >> PcieRoot(0x0)/Pci(0x1F,0x2)/Sata(0x0,0x0,0x0)/HD(1,GPT,E223FF7F-F2DA-4DBB-B765-756F2D95B0FE,0x28,0x64000)
> > this is partition
> >
> > Best wishes!
> > Sergey
> >
> >> and the last is a Partition.
> >> There is no Device HDD.
> >> There is another concept
> >>
> >>
> >>>
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