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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Fwd: iSCSI - revised 2.2.4]Julian, What is the resolution on this issue ? - Santosh Santosh Rao wrote: > > Julian, > > I apologize upfront for being so persistent on this. > > However, it would really help if you could give some clear example of a > scenario as to why the initiator cannot be considered the originator of > a negotiation, when it offers a key value implicitly, through the use of > a default. > > Several people on this list (Paul Konning, Sanjeev, Deva, myself, and > perhaps others, that I cannot recall at the moment) have asked that the > spec must not differentiate login behaviour when the initiator offers a > key explicitly vs. when it offers a key implicitly thru the use of the > default. > > Please help us understand the need for iscsi to distingush the login > behaviour in the above case. [through some tangible scenarios and > examples]. > > Thanks, > Santosh > > > "Sanjeev Bhagat (TRIPACE/Zoetermeer)" wrote: > > > > Julian, > > > > I would also request an explicit definition of offering party and > > responding party. The current text still leaves ambiguity when target > > sends a key in response to implicit default key of the Intiator. In > > this case who is the offering party and who is the responding party > > > > Sanjeev > > > > -----Original Message----- > > From: Julian Satran [mailto:Julian_Satran@il.ibm.com] > > Sent: Friday, October 05, 2001 2:06 PM > > To: ips@ece.cmu.edu > > Subject: iSCSI - revised 2.2.4 > > > > Here is a revised (complete) part 2.2.4 based on recent > > agreed changes: > > > > 1.1.1 Text Mode Negotiation > > > > During login and thereafter some session or connection > > parameters are negotiated through an exchange of textual > > information. > > > > All negotiations are stateless - i.e. the result MUST be > > based only on newly exchanged values. > > > > The general format of text negotiation is: > > > > Originator-> <key>=<valuex> > > Responder-> <key>=<valuey>|reject|NotUnderstood > > > > The value can be a number, a single literal constant a > > Boolean value (yes or no) or a list of comma separated > > literal constant values. > > > > In literal list negotiation, the originator sends for each > > key a list of options (literal constants which may include > > "none") in its order of preference. > > > > The responding party answers with the first value from the > > list it supports and is allowed to use for the specific > > originator. > > > > The constant "none" MUST always be used to indicate a > > missing function. However, none is a valid selection only if > > it is explicitly offered. > > > > If a target is not supporting, or not allowed to use with a > > specific originator, any of the offered options, it may use > > the constant "reject". The constants "none" and "reject" > > are reserved and must be used only as described here. Any > > key not understood is answered with "NotUnderstood". > > > > For numerical and single literal negotiations, the > > responding party MUST respond with the required key and the > > value it selects, based on the selection rule specific to > > the key, becomes the negotiation result. Selection of a > > value not admissible under the selection rules is considered > > a protocol error and handled accordingly. > > > > For Boolean negotiations (keys taking the values yes or no), > > the responding party MUST respond with the required key and > > the result of the negotiation when the received value does > > not determine that result by itself. The last value > > transmitted becomes the negotiation result. The rules for > > selecting the value to respond with are expressed as Boolean > > functions of the value received and the value that the > > responding party would select in the absence of knowledge of > > the received value. > > > > Specifically, the two cases in which responses are OPTIONAL > > are: > > > > - The Boolean function is "AND" and the value "no" is > > received. The outcome of the negotiation is "no". > > - The Boolean function is "OR" and the value "yes" is > > received. The outcome of the negotiation is "yes". > > > > Responses are REQUIRED in all other cases, and the value > > chosen and sent by the responder becomes the outcome of the > > negotiation. > > > > The value "?" with any key has the meaning of enquiry and > > should be answered with the current value or > > "NotUnderstood". > > > > The target may offer key=value pairs of its own. Target > > requests are not limited to matching key=value pairs as > > offered by the initiator. However, only the initiator can > > initiate the negotiation start (through the first Text > > request) and completion (by setting to 1 and keeping to 1 > > the F bit in a Text request). > > > > Comments ? > > > > Julo > > -- > ################################## > Santosh Rao > Software Design Engineer, > HP-UX iSCSI Driver Team, > Hewlett Packard, Cupertino. > email : santoshr@cup.hp.com > Phone : 408-447-3751 > ################################## -- ################################## Santosh Rao Software Design Engineer, HP-UX iSCSI Driver Team, Hewlett Packard, Cupertino. email : santoshr@cup.hp.com Phone : 408-447-3751 ##################################
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