On 05/04/2016 08:58 AM, Paul Mackerras wrote:
> This adds code to scsi_vpd_lun_id() to enable it to use T10 vendor ID
> based designators. This is needed to allow alua to work on disks that
> don't have any designators of type 2, 3 or 8. Commit 0047220c6c36
> ("scsi_dh_alua: use unique device id", 2016-02-19) added a requirement
> that alua can only be used on disks for which scsi_vpd_lun_id() can
> produce an identifying string.
>
> Signed-off-by: Paul Mackerras <[email protected]>
> ---
> drivers/scsi/scsi_lib.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
> index 8106515..f4f69cc 100644
> --- a/drivers/scsi/scsi_lib.c
> +++ b/drivers/scsi/scsi_lib.c
> @@ -3214,6 +3214,20 @@ int scsi_vpd_lun_id(struct scsi_device *sdev, char
> *id, size_t id_len)
> goto next_desig;
>
> switch (d[1] & 0xf) {
> + case 0x1:
> + /* T10 vendor ID */
> + if (cur_id_size > d[3])
> + break;
> + /* Prefer EUI-64 or NAA IEEE Registered Extended */
> + if ((cur_id_type == 0x2 || cur_id_type == 0x3) &&
> + cur_id_size == d[3])
> + break;
> + cur_id_size = d[3];
> + cur_id_str = d + 4;
> + cur_id_type = d[1] & 0xf;
> + id_size = snprintf(id, id_len, "%*phN", cur_id_size,
> + cur_id_str);
> + break;
> case 0x2:
> /* EUI-64 */
> if (cur_id_size > d[3])
>
Nearly.
The thing is, a T-10 vendor specific ID is _supposed_ to be an ASCII
string. So I'd rather have it decoded as such.
And we're missing decoding for 'vendor-specific' ID, too.
I'll be sending a replacement patch.
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
[email protected] +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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