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Introduce support for DIF/DIX in zfcp: Report the capabilities for the Scsi_host, map the protection data when issuing I/O requests and handle the new error codes. Also add the fsf data_direction field to the hba trace, it is useful information for debugging in that area. This is an EXPERIMENTAL feature for now. Signed-off-by: Felix Beck <felix.beck@de.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>