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authorKonstantin Shelekhin <k.shelekhin@yadro.com>2021-05-13 21:28:04 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2021-05-15 20:34:26 +0200
commitb790a56d66eaac4a1ac6c558575fd0a694b06159 (patch)
tree8a5f6106e0f3fe866305eb9979bd3afd49fd91f2
parentscsi: target: core: Bump INQUIRY VERSION to SPC-4 (diff)
downloadlinux-b790a56d66eaac4a1ac6c558575fd0a694b06159.tar.xz
linux-b790a56d66eaac4a1ac6c558575fd0a694b06159.zip
scsi: target: core: Add the VERSION DESCRIPTOR fields to the INQUIRY data
Extend the standard INQUIRY data to 96 bytes and fill in the VERSION DESCRIPTOR fields. The layout follows SPC-4: - SCSI architecture standard - SCSI transport protocol standard - SCSI primary command set standard - SCSI device type command set standard All version descriptor values are defined as "no version claimed" because some initiators fail to recognize anything else. [mkp: whitespace] Link: https://lore.kernel.org/r/20210513192804.1252142-3-k.shelekhin@yadro.com Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Signed-off-by: Konstantin Shelekhin <k.shelekhin@yadro.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/target/target_core_spc.c34
-rw-r--r--include/scsi/scsi_proto.h12
2 files changed, 45 insertions, 1 deletions
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index 0f30b71f0acc..2cb141ed68f5 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -47,10 +47,32 @@ static void spc_fill_alua_data(struct se_lun *lun, unsigned char *buf)
spin_unlock(&lun->lun_tg_pt_gp_lock);
}
+static u16
+spc_find_scsi_transport_vd(int proto_id)
+{
+ switch (proto_id) {
+ case SCSI_PROTOCOL_FCP:
+ return SCSI_VERSION_DESCRIPTOR_FCP4;
+ case SCSI_PROTOCOL_ISCSI:
+ return SCSI_VERSION_DESCRIPTOR_ISCSI;
+ case SCSI_PROTOCOL_SAS:
+ return SCSI_VERSION_DESCRIPTOR_SAS3;
+ case SCSI_PROTOCOL_SBP:
+ return SCSI_VERSION_DESCRIPTOR_SBP3;
+ case SCSI_PROTOCOL_SRP:
+ return SCSI_VERSION_DESCRIPTOR_SRP;
+ default:
+ pr_warn("Cannot find VERSION DESCRIPTOR value for unknown SCSI"
+ " transport PROTOCOL IDENTIFIER %#x\n", proto_id);
+ return 0;
+ }
+}
+
sense_reason_t
spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
{
struct se_lun *lun = cmd->se_lun;
+ struct se_portal_group *tpg = lun->lun_tpg;
struct se_device *dev = cmd->se_dev;
struct se_session *sess = cmd->se_sess;
@@ -108,7 +130,17 @@ spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf)
strnlen(dev->t10_wwn.model, INQUIRY_MODEL_LEN));
memcpy(&buf[32], dev->t10_wwn.revision,
strnlen(dev->t10_wwn.revision, INQUIRY_REVISION_LEN));
- buf[4] = 31; /* Set additional length to 31 */
+
+ /*
+ * Set the VERSION DESCRIPTOR fields
+ */
+ put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SAM5, &buf[58]);
+ put_unaligned_be16(spc_find_scsi_transport_vd(tpg->proto_id), &buf[60]);
+ put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SPC4, &buf[62]);
+ if (cmd->se_dev->transport->get_device_type(dev) == TYPE_DISK)
+ put_unaligned_be16(SCSI_VERSION_DESCRIPTOR_SBC3, &buf[64]);
+
+ buf[4] = 91; /* Set additional length to 91 */
return 0;
}
diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h
index c36860111932..5c106c4f249e 100644
--- a/include/scsi/scsi_proto.h
+++ b/include/scsi/scsi_proto.h
@@ -341,4 +341,16 @@ enum zbc_zone_cond {
ZBC_ZONE_COND_OFFLINE = 0xf,
};
+/* Version descriptor values for INQUIRY */
+enum scsi_version_descriptor {
+ SCSI_VERSION_DESCRIPTOR_FCP4 = 0x0a40,
+ SCSI_VERSION_DESCRIPTOR_ISCSI = 0x0960,
+ SCSI_VERSION_DESCRIPTOR_SAM5 = 0x00a0,
+ SCSI_VERSION_DESCRIPTOR_SAS3 = 0x0c60,
+ SCSI_VERSION_DESCRIPTOR_SBC3 = 0x04c0,
+ SCSI_VERSION_DESCRIPTOR_SBP3 = 0x0980,
+ SCSI_VERSION_DESCRIPTOR_SPC4 = 0x0460,
+ SCSI_VERSION_DESCRIPTOR_SRP = 0x0940
+};
+
#endif /* _SCSI_PROTO_H_ */