From b8908e5e1d1de66e6905fbec7cdfbbf8ac3ecf9a Mon Sep 17 00:00:00 2001
From: Dmitry Bogdanov <d.bogdanov@yadro.com>
Date: Tue, 6 Sep 2022 13:34:20 +0300
Subject: [PATCH] scsi: target: core: Check emulate_3pc for RECEIVE COPY
RECEIVE COPY RESULTS is an opcode from 3rd party copy command set and shall
be rejected if emulate_3pc attribute is off like EXTENDED COPY.
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Link: https://lore.kernel.org/r/20220906103421.22348-6-d.bogdanov@yadro.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
drivers/target/target_core_xcopy.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c
index 8713cda0c2fb5..edf5222082855 100644
--- a/drivers/target/target_core_xcopy.c
+++ b/drivers/target/target_core_xcopy.c
@@ -1009,8 +1009,14 @@ sense_reason_t target_do_receive_copy_results(struct se_cmd *se_cmd)
{
unsigned char *cdb = &se_cmd->t_task_cdb[0];
int sa = (cdb[1] & 0x1f), list_id = cdb[2];
+ struct se_device *dev = se_cmd->se_dev;
sense_reason_t rc = TCM_NO_SENSE;
+ if (!dev->dev_attrib.emulate_3pc) {
+ pr_debug("Third-party copy operations explicitly disabled\n");
+ return TCM_UNSUPPORTED_SCSI_OPCODE;
+ }
+
pr_debug("Entering target_do_receive_copy_results: SA: 0x%02x, List ID:"
" 0x%02x, AL: %u\n", sa, list_id, se_cmd->data_length);
--
2.30.2