From patchwork Wed Mar 9 23:09:44 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Mostafa X-Patchwork-Id: 595747 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 388D9140B0D; Thu, 10 Mar 2016 23:01:09 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1adzH8-0007xz-DL; Thu, 10 Mar 2016 12:01:06 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1adnEo-0000Ta-Fj for kernel-team@lists.ubuntu.com; Wed, 09 Mar 2016 23:09:54 +0000 Received: from 1.general.kamal.us.vpn ([10.172.68.52] helo=fourier) by youngberry.canonical.com with esmtpsa (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.76) (envelope-from ) id 1adnEn-0001uE-Kv; Wed, 09 Mar 2016 23:09:54 +0000 Received: from kamal by fourier with local (Exim 4.86) (envelope-from ) id 1adnEf-0002f4-KM; Wed, 09 Mar 2016 15:09:45 -0800 From: Kamal Mostafa To: Nicholas Bellinger Subject: [3.13.y-ckt stable] Patch "target: Fix TAS handling for multi-session se_node_acls" has been added to the 3.13.y-ckt tree Date: Wed, 9 Mar 2016 15:09:44 -0800 Message-Id: <1457564984-10195-1-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.0 X-Extended-Stable: 3.13 X-Mailman-Approved-At: Thu, 10 Mar 2016 12:00:52 +0000 Cc: Himanshu Madhani , Quinn Tran , Kamal Mostafa , Sagi Grimberg , kernel-team@lists.ubuntu.com, Mike Christie , Hannes Reinecke , Andy Grover , Christoph Hellwig X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com This is a note to let you know that I have just added a patch titled target: Fix TAS handling for multi-session se_node_acls to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.13.y-queue This patch is scheduled to be released in version 3.13.11-ckt36. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.13.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ---8<------------------------------------------------------------ From cf67a228f8f71db30f72fd57116f6071efe51070 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Sun, 6 Mar 2016 02:55:23 +0000 Subject: target: Fix TAS handling for multi-session se_node_acls commit ebde1ca5a908b10312db4ecd7553e3ba039319ab upstream. This patch fixes a bug in TMR task aborted status (TAS) handling when multiple sessions are connected to the same target WWPN endpoint and se_node_acl descriptor, resulting in TASK_ABORTED status to not be generated for aborted se_cmds on the remote port. This is due to core_tmr_handle_tas_abort() incorrectly comparing se_node_acl instead of se_session, for which the multi-session case is expected to be sharing the same se_node_acl. Instead, go ahead and update core_tmr_handle_tas_abort() to compare tmr_sess + cmd->se_sess in order to determine if the LUN_RESET was received on a different I_T nexus, and TASK_ABORTED status response needs to be generated. Reviewed-by: Christoph Hellwig Cc: Quinn Tran Cc: Himanshu Madhani Cc: Sagi Grimberg Cc: Hannes Reinecke Cc: Andy Grover Cc: Mike Christie Signed-off-by: Nicholas Bellinger Signed-off-by: Kamal Mostafa --- drivers/target/target_core_tmr.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) -- 2.7.0 diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c index 7adc5f5..5e7f5bd 100644 --- a/drivers/target/target_core_tmr.c +++ b/drivers/target/target_core_tmr.c @@ -83,7 +83,7 @@ void core_tmr_release_req( } static void core_tmr_handle_tas_abort( - struct se_node_acl *tmr_nacl, + struct se_session *tmr_sess, struct se_cmd *cmd, int tas) { @@ -91,8 +91,7 @@ static void core_tmr_handle_tas_abort( /* * TASK ABORTED status (TAS) bit support */ - if ((tmr_nacl && - (tmr_nacl != cmd->se_sess->se_node_acl)) && tas) { + if (tmr_sess && tmr_sess != cmd->se_sess && tas) { remove = false; transport_send_task_abort(cmd); } @@ -278,7 +277,7 @@ static void core_tmr_drain_tmr_list( static void core_tmr_drain_state_list( struct se_device *dev, struct se_cmd *prout_cmd, - struct se_node_acl *tmr_nacl, + struct se_session *tmr_sess, int tas, struct list_head *preempt_and_abort_list) { @@ -369,7 +368,7 @@ static void core_tmr_drain_state_list( cancel_work_sync(&cmd->work); transport_wait_for_tasks(cmd); - core_tmr_handle_tas_abort(tmr_nacl, cmd, tas); + core_tmr_handle_tas_abort(tmr_sess, cmd, tas); target_put_sess_cmd(cmd->se_sess, cmd); } } @@ -382,6 +381,7 @@ int core_tmr_lun_reset( { struct se_node_acl *tmr_nacl = NULL; struct se_portal_group *tmr_tpg = NULL; + struct se_session *tmr_sess = NULL; int tas; /* * TASK_ABORTED status bit, this is configurable via ConfigFS @@ -400,8 +400,9 @@ int core_tmr_lun_reset( * or struct se_device passthrough.. */ if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { - tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; - tmr_tpg = tmr->task_cmd->se_sess->se_tpg; + tmr_sess = tmr->task_cmd->se_sess; + tmr_nacl = tmr_sess->se_node_acl; + tmr_tpg = tmr_sess->se_tpg; if (tmr_nacl && tmr_tpg) { pr_debug("LUN_RESET: TMR caller fabric: %s" " initiator port %s\n", @@ -414,7 +415,7 @@ int core_tmr_lun_reset( dev->transport->name, tas); core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list); - core_tmr_drain_state_list(dev, prout_cmd, tmr_nacl, tas, + core_tmr_drain_state_list(dev, prout_cmd, tmr_sess, tas, preempt_and_abort_list); /*