From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752443AbdKHEbO (ORCPT ); Tue, 7 Nov 2017 23:31:14 -0500 Received: from mail.linux-iscsi.org ([67.23.28.174]:60307 "EHLO linux-iscsi.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752183AbdKHEbK (ORCPT ); Tue, 7 Nov 2017 23:31:10 -0500 From: "Nicholas A. Bellinger" To: target-devel Cc: linux-scsi , lkml , Nicholas Bellinger , Michael Cyr , "Bryant G. Ly" , Mike Christie , Hannes Reinecke Subject: [PATCH 1/6] target: Fix QUEUE_FULL + SCSI task attribute handling Date: Wed, 8 Nov 2017 04:31:47 +0000 Message-Id: <1510115512-15617-2-git-send-email-nab@linux-iscsi.org> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1510115512-15617-1-git-send-email-nab@linux-iscsi.org> References: <1510115512-15617-1-git-send-email-nab@linux-iscsi.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nicholas Bellinger This patch fixes a bug during QUEUE_FULL where transport_complete_qf() calls transport_complete_task_attr() after it's already been invoked by target_complete_ok_work() or transport_generic_request_failure() during initial completion, preceeding QUEUE_FULL. This will result in se_device->simple_cmds, se_device->dev_cur_ordered_id and/or se_device->dev_ordered_sync being updated multiple times for a single se_cmd. To address this bug, clear SCF_TASK_ATTR_SET after the first call to transport_complete_task_attr(), and avoid updating SCSI task attribute related counters for any subsequent calls. Also, when a se_cmd is deferred due to ordered tags and executed via target_restart_delayed_cmds(), set CMD_T_SENT before execution matching what target_execute_cmd() does. Cc: Michael Cyr Cc: Bryant G. Ly Cc: Mike Christie Cc: Hannes Reinecke Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_transport.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 473d652..c33d1e9 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -2011,6 +2011,8 @@ static void target_restart_delayed_cmds(struct se_device *dev) list_del(&cmd->se_delayed_node); spin_unlock(&dev->delayed_cmd_lock); + cmd->transport_state |= CMD_T_SENT; + __target_execute_cmd(cmd, true); if (cmd->sam_task_attr == TCM_ORDERED_TAG) @@ -2046,6 +2048,8 @@ static void transport_complete_task_attr(struct se_cmd *cmd) pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED\n", dev->dev_cur_ordered_id); } + cmd->se_cmd_flags &= ~SCF_TASK_ATTR_SET; + restart: target_restart_delayed_cmds(dev); } -- 1.9.1