Metze, Upon investigation, it appears that there are some size limits applied on SMB2 IOCTL commands in Windows Server 2008 and Windows Server 2008 R2. The behavior is version-specific. A future release of MS-SMB2 will be updated to reflect the following logic. The change will affect Section “3.3.5.15 Receiving an SMB2 IOCTL Request”. The server SHOULD fail the request with STATUS_INVALID_PARAMETER if InputCount or MaxInputResponse or MaxOutputResponse do not meet the following conditions: Windows 7 and Windows Server 2008 R2 SMB2 servers fail an IOCTL with STATUS_INVALID_PARAMETER if InputCount or MaxInputResponse or MaxOutputResponse is greater than an implementation-specific value. When the connection is on direct TCP transport, Windows 7 and Windows Server 2008 R2 SMB2 Servers set this value to 1024*1024 and on NetBIOS over TCP transport, the value is 64*1024. Windows Vista and Windows Server 2008 SMB2 servers fail an IOCTL request with STATUS_INVALID_PARAMETER if [ max(InputCount, MaxInputResponse) + max(OutputCount, MaxOutputResponse) ] is greater than 256*1024.
Regards, Edgar -----Original Message----- From: Edgar Olougouna Sent: Friday, October 14, 2011 1:36 PM To: Stefan (metze) Metzmacher (me...@samba.org); p...@tridgell.net; cifs-protocol@cifs.org Subject: RE: [REG: 111101256623456] SMB2: ioctl max size Metze, I have investigated this and engaged the product team to clarify SMB2 IOCTL sizes limit. I will update you as soon as I have news. Regards, Edgar -----Original Message----- From: Edgar Olougouna Sent: Wednesday, October 12, 2011 10:47 AM To: Stefan (metze) Metzmacher (me...@samba.org); p...@tridgell.net; cifs-protocol@cifs.org Subject: [REG: 111101256623456] SMB2: ioctl max size [Dochelp to bcc] [Adding case number in subject] Metze, I have opened the case number 111101256623456 for this inquiry. One of my colleagues will take ownership and follow up soon. Regards, Edgar -----Original Message----- From: Stefan (metze) Metzmacher [mailto:me...@samba.org] Sent: Wednesday, October 12, 2011 10:35 AM To: Interoperability Documentation Help; p...@tridgell.net; cifs-protocol@cifs.org Subject: SMB2: ioctl max size Hi dochelp, I wondering if there are any size limitations based on MaxTransactSize, MaxReadSize and/or MaxWriteSize in SMB2 IOCTL? I can't find anything related in the docs, but I guess there is a size limitation too. metze _______________________________________________ cifs-protocol mailing list cifs-protocol@cifs.org https://lists.samba.org/mailman/listinfo/cifs-protocol
