From 1191dcfd650f8342c99f13898fa6e9c6ead01fb9 Mon Sep 17 00:00:00 2001 From: Dinesh Israni Date: Mon, 10 Oct 2016 20:22:03 -0700 Subject: target: Don't override EXTENDED_COPY xcopy_pt_cmd SCSI status code commit 926317de33998c112c5510301868ea9aa34097e2 upstream. This patch addresses a bug where a local EXTENDED_COPY WRITE or READ backend I/O request would always return SAM_STAT_CHECK_CONDITION, even if underlying xcopy_pt_cmd->se_cmd generated a different SCSI status code. ESX host environments expect to hit SAM_STAT_RESERVATION_CONFLICT for certain scenarios, and SAM_STAT_CHECK_CONDITION results in non-retriable status for these cases. Tested on v4.1.y with ESX v5.5u2+ with local IBLOCK backend copy. Reported-by: Nixon Vincent Tested-by: Nixon Vincent Cc: Nixon Vincent Tested-by: Dinesh Israni Signed-off-by: Dinesh Israni Cc: Dinesh Israni Signed-off-by: Nicholas Bellinger Signed-off-by: Greg Kroah-Hartman --- drivers/target/target_core_xcopy.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c index 73c5907dfd82..153a6f255b6d 100644 --- a/drivers/target/target_core_xcopy.c +++ b/drivers/target/target_core_xcopy.c @@ -662,6 +662,7 @@ static int target_xcopy_read_source( rc = target_xcopy_setup_pt_cmd(xpt_cmd, xop, src_dev, &cdb[0], remote_port, true); if (rc < 0) { + ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; transport_generic_free_cmd(se_cmd, 0); return rc; } @@ -673,6 +674,7 @@ static int target_xcopy_read_source( rc = target_xcopy_issue_pt_cmd(xpt_cmd); if (rc < 0) { + ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; transport_generic_free_cmd(se_cmd, 0); return rc; } @@ -723,6 +725,7 @@ static int target_xcopy_write_destination( remote_port, false); if (rc < 0) { struct se_cmd *src_cmd = &xop->src_pt_cmd->se_cmd; + ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; /* * If the failure happened before the t_mem_list hand-off in * target_xcopy_setup_pt_cmd(), Reset memory + clear flag so that @@ -738,6 +741,7 @@ static int target_xcopy_write_destination( rc = target_xcopy_issue_pt_cmd(xpt_cmd); if (rc < 0) { + ec_cmd->scsi_status = xpt_cmd->se_cmd.scsi_status; se_cmd->se_cmd_flags &= ~SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC; transport_generic_free_cmd(se_cmd, 0); return rc; @@ -824,10 +828,14 @@ static void target_xcopy_do_work(struct work_struct *work) out: xcopy_pt_undepend_remotedev(xop); kfree(xop); - - 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; + /* + * 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, SAM_STAT_CHECK_CONDITION); } -- cgit v1.2.3