Re: [RFC] Simlify dif_verify routines and fixup fileio protection information code.

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On 4/15/2015 7:10 PM, Martin K. Petersen wrote:
"Sagi" == Sagi Grimberg <sagig@xxxxxxxxxxxxxxxxxx> writes:

By the commit 436f4a0a ("loopback: Add fabric_prot_type attribute
support"), When WRITE_SAME command with WRPROTECT=0 is executed,
sbc_dif_generate() is called but cmd->t_prot_sg is NULL as block
layer didn't allocate it for WRITE_SAME.

Sagi> Actually this is a bug. Why didn't the initiator allocate
Sagi> integrity meta-data for WRITE_SAME? Looking at the code it looks
Sagi> like it should.

We don't issue WRITE SAME with PI so there is no prot SGL.


Is there a specific reason why we don't?

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