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[SCSI] libosd: OSD Security processing stubs

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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: Boaz Harrosh <bharrosh@panasas.com>
Reviewed-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Boaz Harrosh 2009-01-25 17:03:07 +02:00 committed by James Bottomley
parent 4ef1a3d70d
commit 345c435dbb
1 changed files with 86 additions and 0 deletions
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86
drivers/scsi/osd/osd_initiator.c
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@ -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