The device designator data returned in INQUIRY command will be useful to
fill in source/target fields during copy offloading. Do this when
connecting to the target and save the data for later use.
Signed-off-by: Fam Zheng <f...@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
---
block/iscsi.c | 41 +++++++++++++++++++++++++++++++++++++++++
include/scsi/constants.h | 2 ++
2 files changed, 43 insertions(+)
diff --git a/block/iscsi.c b/block/iscsi.c
index d19ae0e398..5811ff1d51 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -68,6 +68,7 @@ typedef struct IscsiLun {
QemuMutex mutex;
struct scsi_inquiry_logical_block_provisioning lbp;
struct scsi_inquiry_block_limits bl;
+ struct scsi_inquiry_device_designator *dd;
unsigned char *zeroblock;
/* The allocmap tracks which clusters (pages) on the iSCSI target are
* allocated and which are not. In case a target returns zeros for
@@ -1740,6 +1741,30 @@ static QemuOptsList runtime_opts = {
},
};
+static void iscsi_save_designator(IscsiLun *lun,
+ struct scsi_inquiry_device_identification
*inq_di)
+{
+ struct scsi_inquiry_device_designator *desig, *copy = NULL;
+
+ for (desig = inq_di->designators; desig; desig = desig->next) {
+ if (desig->association ||
+ desig->designator_type > SCSI_DESIGNATOR_TYPE_NAA) {
+ continue;
+ }
+ /* NAA works better than T10 vendor ID based designator. */
+ if (!copy || copy->designator_type < desig->designator_type) {
+ copy = desig;
+ }
+ }
+ if (copy) {
+ lun->dd = g_new(struct scsi_inquiry_device_designator, 1);
+ *lun->dd = *copy;
+ lun->dd->next = NULL;
+ lun->dd->designator = g_malloc(copy->designator_length);
+ memcpy(lun->dd->designator, copy->designator, copy->designator_length);
+ }
+}
+
static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
@@ -1922,6 +1947,7 @@ static int iscsi_open(BlockDriverState *bs, QDict
*options, int flags,
struct scsi_task *inq_task;
struct scsi_inquiry_logical_block_provisioning *inq_lbp;
struct scsi_inquiry_block_limits *inq_bl;
+ struct scsi_inquiry_device_identification *inq_di;
switch (inq_vpd->pages[i]) {
case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING:
inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
@@ -1947,6 +1973,17 @@ static int iscsi_open(BlockDriverState *bs, QDict
*options, int flags,
sizeof(struct scsi_inquiry_block_limits));
scsi_free_scsi_task(inq_task);
break;
+ case SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION:
+ inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
+
SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION,
+ (void **) &inq_di, errp);
+ if (inq_task == NULL) {
+ ret = -EINVAL;
+ goto out;
+ }
+ iscsi_save_designator(iscsilun, inq_di);
+ scsi_free_scsi_task(inq_task);
+ break;
default:
break;
}
@@ -2003,6 +2040,10 @@ static void iscsi_close(BlockDriverState *bs)
iscsi_logout_sync(iscsi);
}
iscsi_destroy_context(iscsi);
+ if (iscsilun->dd) {
+ g_free(iscsilun->dd->designator);
+ g_free(iscsilun->dd);
+ }
g_free(iscsilun->zeroblock);
iscsi_allocmap_free(iscsilun);
qemu_mutex_destroy(&iscsilun->mutex);
diff --git a/include/scsi/constants.h b/include/scsi/constants.h
index a141dd71f8..54733b7110 100644
--- a/include/scsi/constants.h
+++ b/include/scsi/constants.h
@@ -311,4 +311,6 @@
#define MMC_PROFILE_HDDVD_RW_DL 0x005A
#define MMC_PROFILE_INVALID 0xFFFF
+#define IDENT_DESCR_TGT_DESCR 0xE4
+
#endif
--
2.14.3
