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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=Section1><p class=MsoNormal><span style='color:#1F497D'>Hi Steven,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thank you for your email.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Someone from my team will be working with you and will be contacting you tomorrow.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks and regards,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:black'>Sebastian Canevari</span></b><span style='font-size:12.0pt;color:navy'><br></span><span style='font-family:"Arial","sans-serif";color:black'>Senior Support Escalation Engineer, US-CSS DSC PROTOCOL TEAM</span><span style='color:navy'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>7100 N Hwy 161, Irving, TX - 75039</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>"Las Colinas - LC2"<o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>Tel: +1 469 775 7849<o:p></o:p></span></i></p><p class=MsoNormal style='margin-bottom:12.0pt'><i><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'><a href="mailto:sebastc@microsoft.com">e-mail: sebastc@microsoft.com</a></span></i><span style='color:#1F497D'><o:p></o:p></span></p></div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Steven Danneman [mailto:steven.danneman@isilon.com] <br><b>Sent:</b> Monday, November 30, 2009 5:58 PM<br><b>To:</b> Interoperability Documentation Help; cifs-protocol@samba.org; pfif@tridgell.net<br><b>Subject:</b> SMB2 mixed lock & unlock requests in a single SMB_LOCK request<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’ve come across another SMB2 locking issue that I can’t find explicit documentation for in MS-SMB2 (v18.0).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My first question, is whether a single SMB_LOCK request can contain both unlock and lock requests as the LockingAndX command type in SMBv1 could? The MS-SMB2 document hints that the answer to this question is “no” but it doesn’t seem to explicitly state it anywhere.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Section 2.2.26 states: “The SMB2 LOCK Request packet is sent by the client to either lock or unlock portions of a file.” <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This statement is ambiguous as to whether the “or” is inclusive or exclusive.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In my testing, sending both lock and unlock requests in a single SMB2 locking request returns a STATUS_INVALID_PARAMETER. However, if the requests are ordered such that a unlock structure come first, the unlock request seems to succeed.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The attached pcap, against W2K8R2 shows:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>1) Packet 27-28: A single lock request succeeding on range 0-10.<o:p></o:p></p><p class=MsoNormal>2) Packet 29-30: A lock request with unlock(0-10) and lock(10-10) failing with INVALID_PARAMETER.<o:p></o:p></p><p class=MsoNormal>3) Packet 31-32: A lock request with lock(0-10) and lock(10-10) succeeding, showing that the previous request, though it returned an error, succeeded in unlocking.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It seems to me the server behavior should be to return STATUS_INVALID_PARAMETER without completing any of the lock/unlock requests when they are mixed. Both the fact that this isn’t allowed, and the W2K8R2 behavior deviation should be documented.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Steven Danneman</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'> </span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#2676AE'>|</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'> <strong><span style='font-family:"Arial","sans-serif"'>Software Development Engineer</span></strong><br></span></b><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:black'>Isilon Systems</span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#666666'> P </span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:black'>+1-206-315-7500</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'> </span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#666666'> F </span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:black'>+1-206-315-7501</span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'><br></span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#003366'><a href="http://www.isilon.com">www.isilon.com</a></span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#666666'> </span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'> </span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#666666'> </span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:black'> </span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'> </span></b><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#666666'> </span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'><o:p></o:p></span></b></p><p style='vertical-align:middle'><span style='color:navy'><img border=0 width=82 height=46 id="Picture_x0020_1" src="cid:image001.gif@01CA720C.69080DF0" alt="cid:image001.gif@01C81005.1792D9C0"> </span><b><span style='color:#666666'> </span></b><strong><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#666666'>How breakthroughs begin. ™</span></strong><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>