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<p>A current passive side CM will reject the incoming CM REQ, because the Service ID will not be recognized.<br>
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Renato J Recio<br>
Chief Architect, eServer I/O<br>
IBM Distinguished Engineer<br>
Member IBM Academy of Technology<br>
Tel 512-838-3685, T/L 678-3685<br>
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<img src="cid:10__=09BBFA24DF97D7C78f9e8a93df938@us.ibm.com" width="16" height="16" alt="Inactive hide details for "Caitlin Bestler" <caitlinb@broadcom.com>">"Caitlin Bestler" <caitlinb@broadcom.com><br>
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<ul><b><font size="2">"Caitlin Bestler" <caitlinb@broadcom.com></font></b>
<p><font size="2">11/11/2005 03:12 PM</font></ul>
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<font size="1" face="Arial"> </font><br>
<font size="2"> To: </font><font size="2">Renato Recio/Austin/IBM@IBMUS</font><br>
<font size="2"> cc: </font><font size="2">"Kanevsky, Arkady" <Arkady.Kanevsky@netapp.com>, dat-discussions@yahoogroups.com, "Sean Hefty" <mshefty@ichips.intel.com>, openib-general@openib.org, swg@infinibandta.org</font><br>
<font size="2"> Subject: </font><font size="2">RE: [swg] RE: [openib-general] RE: [dat-discussions] socket based connectionmodel for IB proposal - round 3</font></td></tr>
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<hr width="100%" size="2" align="left"><b><font face="Tahoma">From:</font></b><font face="Tahoma"> Renato Recio [<a href="mailto:recio@us.ibm.com">mailto:recio@us.ibm.com</a>] </font><b><font face="Tahoma"><br>
Sent:</font></b><font face="Tahoma"> Friday, November 11, 2005 12:25 PM</font><b><font face="Tahoma"><br>
To:</font></b><font face="Tahoma"> Caitlin Bestler</font><b><font face="Tahoma"><br>
Cc:</font></b><font face="Tahoma"> Kanevsky, Arkady; dat-discussions@yahoogroups.com; Sean Hefty; openib-general@openib.org; swg@infinibandta.org</font><b><font face="Tahoma"><br>
Subject:</font></b><font face="Tahoma"> RE: [swg] RE: [openib-general] RE: [dat-discussions] socket based connectionmodel for IB proposal - round 3</font><font size="4" face="Times New Roman"><br>
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<p><font size="4" face="Times New Roman">Any active side QP can target a passive side CM QP (QP1 or redirected QPN). However, due to the use of priviliged Q_Keys, only an active side priviliged QP can target the passive side CM QP. <br>
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It seems to me that our proposal of having the Service ID be generated by priviliged mode code, having a Service ID associated with RDMA Services (e.g. iSER, NFSeR, ...), and having priviliged mode code generate the first N bytes of the private data field (i.e. the bytes in question); allows the passive side: </font>
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<ul><font size="4" face="Times New Roman">- Transport to validate an incoming CM message was generated by a priviliged consumer; and<br>
- CM to know the Service ID and first N-bytes of the private data field were generated by a priviliged consumer.</font></ul>
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How does this prevent a non-privileged client running on a remote host with current</font><br>
<font color="#0000FF" face="Arial">CM software from generating a connection request to the targeted Service ID</font><br>
<font color="#0000FF" face="Arial">with the entire private data coming from the non-privileged consumer.</font><br>
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<font color="#0000FF" face="Arial">A current CM does not know that the Service ID requires it to generate/validate</font><br>
<font color="#0000FF" face="Arial">any portion of the private data.</font><br>
<font size="4" face="Times New Roman"> </font><br>
<font color="#0000FF" face="Arial">A current CM does not know how to use a later version number or to set a</font><br>
<font color="#0000FF" face="Arial">bit that is currently defined as reserved.</font><br>
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