A question on Per Stream Context in W2K SP4

NTFSD
1

I searched the archive and found Per Stream Context is supported not only
in WinXP but also in W2K SP4(based on the message Neal answered). So,
how can I know if the system is running on W2K SP4? Is there any version
check that driver can use to detect the W2K SP4 installed?

Thanks

2

Per stream contexts are “not” generally available on W2K SP4. They will become available with the Security Rollup (SRP) that is being released later this year that contains full filter manager support.

The easiest way to detect this is to not test the version number. In the FSRTL_COMMON_FCB_HEADER you can test the flag FSRTL_FLAG2_SUPPORTS_FILTER_CONTEXTS. If set then this is actually an advanced FCB header and has been properly configured for pre-stream context support. In fact there is a macro in NTIFS.H called “FsRtlSupportsPerStreamContexts”. This macro works properly even on downlevel OS’s that don’t support per-stream contexts.

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no rights

From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of Dongli Wu
Sent: Tuesday, January 11, 2005 7:33 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] A question on Per Stream Context in W2K SP4

I searched the archive and found Per Stream Context is supported not only
in WinXP but also in W2K SP4(based on the message Neal answered). So,
how can I know if the system is running on W2K SP4? Is there any version
check that driver can use to detect the W2K SP4 installed?
?
Thanks
?
?
— Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17 You are currently subscribed to ntfsd as: xxxxx@windows.microsoft.com To unsubscribe send a blank email to xxxxx@lists.osr.com

3

Neal, Thank you for your pointing out. It seems that I misunderstand
Per Stream Contexts status on Win2K Platform.
One more question: I logged on to http://beta.microsoft.com to
Get beta version IFS kit but didn’t get approved e-mail. We did order
XP IFS kit before but the order was not under my name. Is it necessary
To get the approve that our XP IFS kit order under my name?

Thanks

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Neal Christiansen
Sent: Tuesday, January 11, 2005 12:42 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] A question on Per Stream Context in W2K SP4

Per stream contexts are “not” generally available on W2K SP4. They will
become available with the Security Rollup (SRP) that is being released later
this year that contains full filter manager support.

The easiest way to detect this is to not test the version number. In the
FSRTL_COMMON_FCB_HEADER you can test the flag
FSRTL_FLAG2_SUPPORTS_FILTER_CONTEXTS. If set then this is actually an
advanced FCB header and has been properly configured for pre-stream context
support. In fact there is a macro in NTIFS.H called
“FsRtlSupportsPerStreamContexts”. This macro works properly even on
downlevel OS’s that don’t support per-stream contexts.

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no rights

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Dongli Wu
Sent: Tuesday, January 11, 2005 7:33 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] A question on Per Stream Context in W2K SP4

I searched the archive and found Per Stream Context is supported not only in
WinXP but also in W2K SP4(based on the message Neal answered). So,
how can I know if the system is running on W2K SP4? Is there any version
check that driver can use to detect the W2K SP4 installed?
?
Thanks
?
?
— Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17 You are currently subscribed to
ntfsd as: xxxxx@windows.microsoft.com To unsubscribe send a blank email to
xxxxx@lists.osr.com

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

4

David,

It is not necessary for the IFS Kit order to be in your name, it just needs to have been ordered by your company. Please send an email to xxxxx@microsoft.com with this information so you can get registered.

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no rights

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of David Wu
Sent: Tuesday, January 11, 2005 5:42 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] A question on Per Stream Context in W2K SP4

Neal, Thank you for your pointing out. It seems that I misunderstand
Per Stream Contexts status on Win2K Platform.
One more question: I logged on to http://beta.microsoft.com to
Get beta version IFS kit but didn’t get approved e-mail. We did order
XP IFS kit before but the order was not under my name. Is it necessary
To get the approve that our XP IFS kit order under my name?

Thanks

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Neal Christiansen
Sent: Tuesday, January 11, 2005 12:42 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] A question on Per Stream Context in W2K SP4

Per stream contexts are “not” generally available on W2K SP4. They will
become available with the Security Rollup (SRP) that is being released later
this year that contains full filter manager support.

The easiest way to detect this is to not test the version number. In the
FSRTL_COMMON_FCB_HEADER you can test the flag
FSRTL_FLAG2_SUPPORTS_FILTER_CONTEXTS. If set then this is actually an
advanced FCB header and has been properly configured for pre-stream context
support. In fact there is a macro in NTIFS.H called
“FsRtlSupportsPerStreamContexts”. This macro works properly even on
downlevel OS’s that don’t support per-stream contexts.

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no rights

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Dongli Wu
Sent: Tuesday, January 11, 2005 7:33 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] A question on Per Stream Context in W2K SP4

I searched the archive and found Per Stream Context is supported not only in
WinXP but also in W2K SP4(based on the message Neal answered). So,
how can I know if the system is running on W2K SP4? Is there any version
check that driver can use to detect the W2K SP4 installed?
?
Thanks
?
?
— Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17 You are currently subscribed to
ntfsd as: xxxxx@windows.microsoft.com To unsubscribe send a blank email to
xxxxx@lists.osr.com

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

5

Thank you Neal. I got the registration permission today.

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Neal Christiansen
Sent: Wednesday, January 12, 2005 11:10 AM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] A question on Per Stream Context in W2K SP4

David,

It is not necessary for the IFS Kit order to be in your name, it just needs
to have been ordered by your company. Please send an email to
xxxxx@microsoft.com with this information so you can get registered.

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no rights

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of David Wu
Sent: Tuesday, January 11, 2005 5:42 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] A question on Per Stream Context in W2K SP4

Neal, Thank you for your pointing out. It seems that I misunderstand Per
Stream Contexts status on Win2K Platform. One more question: I logged on to
http://beta.microsoft.com to Get beta version IFS kit but didn’t get
approved e-mail. We did order XP IFS kit before but the order was not under
my name. Is it necessary To get the approve that our XP IFS kit order under
my name?

Thanks

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Neal Christiansen
Sent: Tuesday, January 11, 2005 12:42 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] A question on Per Stream Context in W2K SP4

Per stream contexts are “not” generally available on W2K SP4. They will
become available with the Security Rollup (SRP) that is being released later
this year that contains full filter manager support.

The easiest way to detect this is to not test the version number. In the
FSRTL_COMMON_FCB_HEADER you can test the flag
FSRTL_FLAG2_SUPPORTS_FILTER_CONTEXTS. If set then this is actually an
advanced FCB header and has been properly configured for pre-stream context
support. In fact there is a macro in NTIFS.H called
“FsRtlSupportsPerStreamContexts”. This macro works properly even on
downlevel OS’s that don’t support per-stream contexts.

Neal Christiansen
Microsoft File System Filter Group Lead
This posting is provided “AS IS” with no warranties, and confers no rights

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Dongli Wu
Sent: Tuesday, January 11, 2005 7:33 AM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] A question on Per Stream Context in W2K SP4

I searched the archive and found Per Stream Context is supported not only in
WinXP but also in W2K SP4(based on the message Neal answered). So,
how can I know if the system is running on W2K SP4? Is there any version
check that driver can use to detect the W2K SP4 installed?
?
Thanks
?
?
— Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17 You are currently subscribed to
ntfsd as: xxxxx@windows.microsoft.com To unsubscribe send a blank email to
xxxxx@lists.osr.com

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: unknown lmsubst tag argument: ‘’
To unsubscribe send a blank email to xxxxx@lists.osr.com