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path: root/drivers/scsi/libiscsi.c
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Diffstat (limited to 'drivers/scsi/libiscsi.c')
-rw-r--r--drivers/scsi/libiscsi.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 40462415291e..3c11acf67849 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -395,6 +395,10 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
if (rc)
return rc;
}
+
+ if (scsi_get_prot_op(sc) != SCSI_PROT_NORMAL)
+ task->protected = true;
+
if (sc->sc_data_direction == DMA_TO_DEVICE) {
unsigned out_len = scsi_out(sc)->length;
struct iscsi_r2t_info *r2t = &task->unsol_r2t;
@@ -823,6 +827,33 @@ static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
sc->result = (DID_OK << 16) | rhdr->cmd_status;
+ if (task->protected) {
+ sector_t sector;
+ u8 ascq;
+
+ /**
+ * Transports that didn't implement check_protection
+ * callback but still published T10-PI support to scsi-mid
+ * deserve this BUG_ON.
+ **/
+ BUG_ON(!session->tt->check_protection);
+
+ ascq = session->tt->check_protection(task, &sector);
+ if (ascq) {
+ sc->result = DRIVER_SENSE << 24 |
+ SAM_STAT_CHECK_CONDITION;
+ scsi_build_sense_buffer(1, sc->sense_buffer,
+ ILLEGAL_REQUEST, 0x10, ascq);
+ sc->sense_buffer[7] = 0xc; /* Additional sense length */
+ sc->sense_buffer[8] = 0; /* Information desc type */
+ sc->sense_buffer[9] = 0xa; /* Additional desc length */
+ sc->sense_buffer[10] = 0x80; /* Validity bit */
+
+ put_unaligned_be64(sector, &sc->sense_buffer[12]);
+ goto out;
+ }
+ }
+
if (rhdr->response != ISCSI_STATUS_CMD_COMPLETED) {
sc->result = DID_ERROR << 16;
goto out;
@@ -1567,6 +1598,7 @@ static inline struct iscsi_task *iscsi_alloc_task(struct iscsi_conn *conn,
task->have_checked_conn = false;
task->last_timeout = jiffies;
task->last_xfer = jiffies;
+ task->protected = false;
INIT_LIST_HEAD(&task->running);
return task;
}