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Commit 345c435d authored by Boaz Harrosh's avatar Boaz Harrosh Committed by James Bottomley
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[SCSI] libosd: OSD Security processing stubs 



Layout the signing of OSD's CDB and all-data security modes. The actual
code for signing the data and CDB is missing, but the code flow and the extra
buffer segments are all in place.

Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
Reviewed-by: default avatarBenny Halevy <bhalevy@panasas.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 4ef1a3d7

drivers/scsi/osd/osd_initiator.c

+86 −0
Original line number Diff line number Diff line
@@ -111,6 +111,14 @@ static osd_cdb_offset osd_req_encode_offset(struct osd_request *or, 
				  OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT);

}



static struct osd_security_parameters *

_osd_req_sec_params(struct osd_request *or)

{

	struct osd_cdb *ocdb = &or->cdb;



	return &ocdb->v1.sec_params;

}



void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)

{

	memset(osdd, 0, sizeof(*osdd));
@@ -799,6 +807,64 @@ static int _osd_req_finalize_attr_page(struct osd_request *or) 
	return ret;

}



static int _osd_req_finalize_data_integrity(struct osd_request *or,

	bool has_in, bool has_out, const u8 *cap_key)

{

	struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);

	int ret;



	if (!osd_is_sec_alldata(sec_parms))

		return 0;



	if (has_out) {

		struct _osd_req_data_segment seg = {

			.buff = &or->out_data_integ,

			.total_bytes = sizeof(or->out_data_integ),

		};

		unsigned pad;



		or->out_data_integ.data_bytes = cpu_to_be64(

			or->out.bio ? or->out.bio->bi_size : 0);

		or->out_data_integ.set_attributes_bytes = cpu_to_be64(

			or->set_attr.total_bytes);

		or->out_data_integ.get_attributes_bytes = cpu_to_be64(

			or->enc_get_attr.total_bytes);



		sec_parms->data_out_integrity_check_offset =

			osd_req_encode_offset(or, or->out.total_bytes, &pad);



		ret = _req_append_segment(or, pad, &seg, or->out.last_seg,

					  &or->out);

		if (ret)

			return ret;

		or->out.last_seg = NULL;



		/* they are now all chained to request sign them all together */

		osd_sec_sign_data(&or->out_data_integ, or->out.req->bio,

				  cap_key);

	}



	if (has_in) {

		struct _osd_req_data_segment seg = {

			.buff = &or->in_data_integ,

			.total_bytes = sizeof(or->in_data_integ),

		};

		unsigned pad;



		sec_parms->data_in_integrity_check_offset =

			osd_req_encode_offset(or, or->in.total_bytes, &pad);



		ret = _req_append_segment(or, pad, &seg, or->in.last_seg,

					  &or->in);

		if (ret)

			return ret;



		or->in.last_seg = NULL;

	}



	return 0;

}



/*

 * osd_finalize_request and helpers

 */
@@ -919,6 +985,12 @@ int osd_finalize_request(struct osd_request *or, 
		}

	}



	ret = _osd_req_finalize_data_integrity(or, has_in, has_out, cap_key);

	if (ret)

		return ret;



	osd_sec_sign_cdb(&or->cdb, cap_key);



	or->request->cmd = or->cdb.buff;

	or->request->cmd_len = _osd_req_cdb_len(or);
@@ -984,6 +1056,20 @@ void osd_set_caps(struct osd_cdb *cdb, const void *caps) 
	memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN);

}



bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)

{

	return false;

}



void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)

{

}



void osd_sec_sign_data(void *data_integ __unused,

		       struct bio *bio __unused, const u8 *cap_key __unused)

{

}



/*

 * Declared in osd_protocol.h

 * 4.12.5 Data-In and Data-Out buffer offsets