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libata: Include WWN ID in inquiry VPD emulation 

As per SAT-3 the WWN ID should be included in the VPD page 0x83
(device identification) emulation.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Hannes Reinecke 2011-03-07 08:56:44 +01:00 committed by Jeff Garzik
parent 60a230e4a6
commit 6b3b9d73e0
2 changed files with 18 additions and 0 deletions
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11
drivers/ata/libata-scsi.c
View File

@ -2056,6 +2056,17 @@ static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
ATA_ID_SERNO_LEN);
num += ATA_ID_SERNO_LEN;
if (ata_id_has_wwn(args->id)) {
/* SAT defined lu world wide name */
/* piv=0, assoc=lu, code_set=binary, designator=NAA */
rbuf[num + 0] = 1;
rbuf[num + 1] = 3;
rbuf[num + 3] = ATA_ID_WWN_LEN;
num += 4;
ata_id_string(args->id, (unsigned char *) rbuf + num,
ATA_ID_WWN, ATA_ID_WWN_LEN);
num += ATA_ID_WWN_LEN;
}
rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
return 0;
}

7
include/linux/ata.h
View File

@ -89,6 +89,7 @@ enum {
ATA_ID_SPG = 98,
ATA_ID_LBA_CAPACITY_2 = 100,
ATA_ID_SECTOR_SIZE = 106,
ATA_ID_WWN = 108,
ATA_ID_LOGICAL_SECTOR_SIZE = 117, /* and 118 */
ATA_ID_LAST_LUN = 126,
ATA_ID_DLF = 128,
@ -103,6 +104,7 @@ enum {
ATA_ID_SERNO_LEN = 20,
ATA_ID_FW_REV_LEN = 8,
ATA_ID_PROD_LEN = 40,
ATA_ID_WWN_LEN = 8,
ATA_PCI_CTL_OFS = 2,
@ -815,6 +817,11 @@ static inline int ata_id_has_unload(const u16 *id)
return 0;
}
static inline bool ata_id_has_wwn(const u16 *id)
{
return (id[ATA_ID_CSF_DEFAULT] & 0xC100) == 0x4100;
}
static inline int ata_id_form_factor(const u16 *id)
{
u16 val = id[168];