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FAILED: patch "[PATCH] scsi: target: Fix sense key for invalid EXTENDED COPY request" failed to apply to 4.19-stable tree

PATCH [email protected] 1 participant 1 message Sep 24, 2021

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The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 0394b5048efd73b04276979d014a67f30c0ad699 Mon Sep 17 00:00:00 2001
From: Sergey Samoylenko <[email protected]>
Date: Tue, 3 Aug 2021 17:54:10 +0300
Subject: [PATCH] scsi: target: Fix sense key for invalid EXTENDED COPY request

TCM fails to pass the following tests in libiscsi:

SCSI.ExtendedCopy.DescrType
SCSI.ExtendedCopy.DescrLimits
SCSI.ExtendedCopy.ParamHdr
SCSI.ExtendedCopy.ValidSegDescr
SCSI.ExtendedCopy.ValidTgtDescr

The xcopy code always returns the same NOT READY sense key for all detected errors. Change the sense key for invalid requests to ILLEGAL REQUEST, and for aborted transfers to COPY ABORTED.

Link https://lore.kernel.org/r/[email protected] open here
Fixes d877d7275be3 ("target: Fix a deadlock between the XCOPY code and iSCSI session shutdown")
Reviewed-by David Disseldorp <[email protected]>
Reviewed-by Roman Bolshakov <[email protected]>
Reviewed-by Konstantin Shelekhin <[email protected]>
Signed-off-by Sergey Samoylenko <[email protected]>
Signed-off-by Martin K. Petersen <[email protected]>
drivers/target/target_core_xcopy.c +15 -11
index 0f1319336f3e..d4fe7cb2bd00 100644
@@ -674,12 +674,16 @@ static void target_xcopy_do_work(struct work_struct *work)
 	unsigned int max_sectors;
 	int rc = 0;
 	unsigned short nolb, max_nolb, copied_nolb = 0;
+	sense_reason_t sense_rc;
 
-	if (target_parse_xcopy_cmd(xop) != TCM_NO_SENSE)
+	sense_rc = target_parse_xcopy_cmd(xop);
+	if (sense_rc != TCM_NO_SENSE)
 		goto err_free;
 
-	if (WARN_ON_ONCE(!xop->src_dev) || WARN_ON_ONCE(!xop->dst_dev))
+	if (WARN_ON_ONCE(!xop->src_dev) || WARN_ON_ONCE(!xop->dst_dev)) {
+		sense_rc = TCM_INVALID_PARAMETER_LIST;
 		goto err_free;
+	}
 
 	src_dev = xop->src_dev;
 	dst_dev = xop->dst_dev;

@@ -762,20 +766,20 @@ static void target_xcopy_do_work(struct work_struct *work)
 	return;
 
 out:
+	/*
+	 * The XCOPY command was aborted after some data was transferred.
+	 * Terminate command with CHECK CONDITION status, with the sense key
+	 * set to COPY ABORTED.
+	 */
+	sense_rc = TCM_COPY_TARGET_DEVICE_NOT_REACHABLE;
 	xcopy_pt_undepend_remotedev(xop);
 	target_free_sgl(xop->xop_data_sg, xop->xop_data_nents);
 
 err_free:
 	kfree(xop);
-	/*
-	 * Don't override an error scsi status if it has already been set
-	 */
-	if (ec_cmd->scsi_status == SAM_STAT_GOOD) {
-		pr_warn_ratelimited("target_xcopy_do_work: rc: %d, Setting X-COPY"
-			" CHECK_CONDITION -> sending response\n", rc);
-		ec_cmd->scsi_status = SAM_STAT_CHECK_CONDITION;
-	}
-	target_complete_cmd(ec_cmd, ec_cmd->scsi_status);
+	pr_warn_ratelimited("target_xcopy_do_work: rc: %d, sense: %u, XCOPY operation failed\n",
+			   rc, sense_rc);
+	target_complete_cmd_with_sense(ec_cmd, SAM_STAT_CHECK_CONDITION, sense_rc);
 }
 
 /*