[PATCH 6/6] scsi: target: check emulate_3pc for RECEIVE COPY

Dmitry Bogdanov
2022-07-18T12:03:30Z

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>
---
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 6bb20aa9c5bc..37e6b4fef0e5 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);

--
2.25.1