On 31/10/2013 5:24, Sagi Grimberg wrote:
+ * @type3_inc_reftag: T10-DIF type 3 does not state + * about the reference tag, it is the user + * choice to increment it or not.
Can you explain this further ? Does this mean that the HCA can check whether the reference tags are increasing when receiving data for TYPE 3 protection mode ? My understanding of SPC-4 is that the application is free to use the reference tag in any way when using TYPE 3 protection and hence that the HCA must not check whether the reference tag is increasing for TYPE 3 protection. See e.g. sd_dif_type3_get_tag() in drivers/scsi/sd_dif.c.
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