[vbox-dev] No more supports DrvStoregeFilter Sample ?

[Woof]

I treid DrvStoregeFilter sample, but it makes crash. because PDMIMEDIA does
not have pfnGetSectorSize member.

so add that function but still occur access violation on running time. ;(

I wanna to know this sample is not supported now?

working on 4.3.12 (4.3.14 makes crash with A/Vs..)

I hope just not updated problem.. :|

Thanks. :D
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[Woof]

Hm..

I fixed crash, it was in below interface.

these code could not get pfnDiscard and pfnStartDiscard members.
pThis->pIMediaBelow = PDMIBASE_QUERY_INTERFACE(pIBaseBelow,
PDMIMEDIA);
pThis->pIMediaAsyncBelow = PDMIBASE_QUERY_INTERFACE(pIBaseBelow,
PDMIMEDIAASYNC);

Actually, below is DrvVD. it has allocated drvvdDiskcard(),
drvvdStartDiscard(). but members are NULL.

so.. I tried to assign these functions using debugger, it does not make
crash but does not work.

finally, i modified when it call below driver interface member, if the
interface member is null, just return success(0). it seems like no problem.

*If this sample is still valid, should be fixed these point.*
** it needs pfnGetSectorsize member in iMedia*
** Checks below interface functions pointer*

thanks~


ps.. I do not know when that members are ignored.. ;(

Post by Woof
I treid DrvStoregeFilter sample, but it makes crash. because PDMIMEDIA
does not have pfnGetSectorSize member.
so add that function but still occur access violation on running time. ;(
I wanna to know this sample is not supported now?
working on 4.3.12 (4.3.14 makes crash with A/Vs..)
I hope just not updated problem.. :|
Thanks. :D

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[Woof]

Sorry about separated Questions.

How can i figure out pfnTranserCompleteNotify callback from read or write?
and its buffers information.

i wanna write encryption/decryption filter for HDD Image. am i right way??

Thanks..

Post by Woof
Hm..
I fixed crash, it was in below interface.
these code could not get pfnDiscard and pfnStartDiscard members.
pThis->pIMediaBelow = PDMIBASE_QUERY_INTERFACE(pIBaseBelow,
PDMIMEDIA);
pThis->pIMediaAsyncBelow = PDMIBASE_QUERY_INTERFACE(pIBaseBelow,
PDMIMEDIAASYNC);
Actually, below is DrvVD. it has allocated drvvdDiskcard(),
drvvdStartDiscard(). but members are NULL.
so.. I tried to assign these functions using debugger, it does not make
crash but does not work.
finally, i modified when it call below driver interface member, if the
interface member is null, just return success(0). it seems like no problem.
*If this sample is still valid, should be fixed these point.*
** it needs pfnGetSectorsize member in iMedia*
** Checks below interface functions pointer*
thanks~
ps.. I do not know when that members are ignored.. ;(

Post by Woof
I treid DrvStoregeFilter sample, but it makes crash. because PDMIMEDIA
does not have pfnGetSectorSize member.
so add that function but still occur access violation on running time. ;(
I wanna to know this sample is not supported now?
working on 4.3.12 (4.3.14 makes crash with A/Vs..)
I hope just not updated problem.. :|
Thanks. :D

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[Klaus Espenlaub]

Hi Woof,

the DrvStorageFilter sample apparently became somewhat broken due to the
introduction of new optional functionality. Minor bit rot, will be fixed
in the next 4.3 release. If you're impatient,
https://www.virtualbox.org/changeset/52547/vbox shows what changes are
needed to get it working.

Post by Woof
Sorry about separated Questions.
How can i figure out pfnTranserCompleteNotify callback from read or
write? and its buffers information.
i wanna write encryption/decryption filter for HDD Image. am i right way??

Not really... for such functionality we introduced filter support at the
VD layer level (which has the necessary means to implement this, a
generic storage filter driver has far less possibilities) - and the fact
that we're introducing such support should be a clear enough hint that
we're working on such functionality already.

BTW, if you have trouble with 4.3.14, try the latest test build in
https://www.virtualbox.org/ticket/13187 and let us know if it addresses
your problems (or what's the exact error you're getting).

Klaus

Post by Woof
Thanks..
2014-08-29 14:44 GMT+09:00 Woof <he1.woof at gmail.com
Hm..
I fixed crash, it was in below interface.
these code could not get pfnDiscard and pfnStartDiscard members.
pThis->pIMediaBelow = PDMIBASE_QUERY_INTERFACE(pIBaseBelow,
PDMIMEDIA);
pThis->pIMediaAsyncBelow = PDMIBASE_QUERY_INTERFACE(pIBaseBelow,
PDMIMEDIAASYNC);
Actually, below is DrvVD. it has allocated drvvdDiskcard(),
drvvdStartDiscard(). but members are NULL.
so.. I tried to assign these functions using debugger, it does not
make crash but does not work.
finally, i modified when it call below driver interface member, if
the interface member is null, just return success(0). it seems like
no problem.
*If this sample is still valid, should be fixed these point.*
** it needs pfnGetSectorsize member in iMedia*
** Checks below interface functions pointer*
thanks~
ps.. I do not know when that members are ignored.. ;(
2014-08-29 11:33 GMT+09:00 Woof <he1.woof at gmail.com
I treid DrvStoregeFilter sample, but it makes crash. because
PDMIMEDIA does not have pfnGetSectorSize member.
so add that function but still occur access violation on running time. ;(
I wanna to know this sample is not supported now?
working on 4.3.12 (4.3.14 makes crash with A/Vs..)
I hope just not updated problem.. :|
Thanks. :D