[stgt] [RESEND] [PATCH] Fix for segfault in tgtd sendtargets

[Arne Redlich]

Am Dienstag, den 21.04.2009, 05:46 +0100 schrieb Chris Webb: 
> If we hardcode this sendtargets limit, can we make sure it's something
> bigger than 8192? A iSCSI target daemon that silently fails to export more
> than 70 targets is okay for small-scale tests but not much more than that.
> 
> Cheers,
> 
> Chris.

No. And in fact even hardwiring it to 8k could potentially lead to
problems already, it's just very unlikely.

As I wrote before: to get it right (i.e. support an arbitrarily long
list of targets), the data must be split into several PDUs, each having
a max size of the MaxRecvDSL the initiator declared. And sequencing of
these PDUs is also different from SCSI Data In's, i.e. the first text
rsp is sent with a tag indicating there is more data, and the initiator
can then choose to request the next part of the response with another
text request.

We have support for that in IET trunk - given TGTs roots it might be
possible to port it.

Arne

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