From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 02997163A90; Mon, 29 Jan 2024 18:36:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706553397; cv=none; b=uP0/73CPnDuTA/wvU6vWKNGLJiUj5Bv2nWvkzCaJRzN9fwtJt2ylKOkCzoIMG5qGQTudK0J+2we+BK/NAmA4mrwIVxET973EUzgndfG3NzQx+8VfjsQERpZqWqKk2Xn9i//9k7FNgNPV3TUSwuZ1y5uqee5ykjJIDGepucxjcUM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706553397; c=relaxed/simple; bh=8+O35hG4S9TnllCWxGdxV+fD6BRhl7a744frjYfU15c=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=P79rkaM0sS/Xr63/94hZtTD/Jky1cdWVDx2FVSIs1/sJNMNlm3854gPctjhBAl1hzByPsAFyzg3PspXVqZL0oOvDdrQ+gW2uEMtLdLbxluuHkZqLe89ZCvxY4Rpn/bWoR1tZJtkLdKP1Vn0yk0lO8qscFExAqZMz2BmxCrljYjk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=erpjfTK3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="erpjfTK3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C59DBC433F1; Mon, 29 Jan 2024 18:36:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706553396; bh=8+O35hG4S9TnllCWxGdxV+fD6BRhl7a744frjYfU15c=; h=From:To:Cc:Subject:Date:From; b=erpjfTK3mlyTtQYX61P54SDS4onnfiZYoYet6qUnydpZGVZm0dBgAH7kvjczfngQ7 Ov4tTtpbjPHBU0VPPewI73u1RNs0+ZRcUzjkzrxgG0PrDvsOqvQYuQ90sB9npHROHU XtlPzRbQavI4CHG57zl11N63N0Bue1Yp0vof8hpTyNqrAOwF5tWSmhqvysqLD10Jea 9xhQaWTZzlelh5kfglZa9rBdKLC/+T8Eno3w0bPK9FN/5DXpAv0QrbMOLsUka1aeUo qctyDrThsu4mZh1PA14bSqbiqC1v3Cx4nlrV+w0di82yPS6tJ8ud1qkysMtssEzvu1 DWMWmkBA21pXA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Bogdanov , Mike Christie , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org, target-devel@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 1/2] scsi: target: core: Add TMF to tmr_list handling Date: Mon, 29 Jan 2024 13:36:30 -0500 Message-ID: <20240129183633.464847-1-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 4.19.306 Content-Transfer-Encoding: 8bit From: Dmitry Bogdanov [ Upstream commit 83ab68168a3d990d5ff39ab030ad5754cbbccb25 ] An abort that is responded to by iSCSI itself is added to tmr_list but does not go to target core. A LUN_RESET that goes through tmr_list takes a refcounter on the abort and waits for completion. However, the abort will be never complete because it was not started in target core. Unable to locate ITT: 0x05000000 on CID: 0 Unable to locate RefTaskTag: 0x05000000 on CID: 0. wait_for_tasks: Stopping tmf LUN_RESET with tag 0x0 ref_task_tag 0x0 i_state 34 t_state ISTATE_PROCESSING refcnt 2 transport_state active,stop,fabric_stop wait for tasks: tmf LUN_RESET with tag 0x0 ref_task_tag 0x0 i_state 34 t_state ISTATE_PROCESSING refcnt 2 transport_state active,stop,fabric_stop ... INFO: task kworker/0:2:49 blocked for more than 491 seconds. task:kworker/0:2 state:D stack: 0 pid: 49 ppid: 2 flags:0x00000800 Workqueue: events target_tmr_work [target_core_mod] Call Trace: __switch_to+0x2c4/0x470 _schedule+0x314/0x1730 schedule+0x64/0x130 schedule_timeout+0x168/0x430 wait_for_completion+0x140/0x270 target_put_cmd_and_wait+0x64/0xb0 [target_core_mod] core_tmr_lun_reset+0x30/0xa0 [target_core_mod] target_tmr_work+0xc8/0x1b0 [target_core_mod] process_one_work+0x2d4/0x5d0 worker_thread+0x78/0x6c0 To fix this, only add abort to tmr_list if it will be handled by target core. Signed-off-by: Dmitry Bogdanov Link: https://lore.kernel.org/r/20240111125941.8688-1-d.bogdanov@yadro.com Reviewed-by: Mike Christie Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/target/target_core_device.c | 5 ----- drivers/target/target_core_transport.c | 4 ++++ 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index a23dcbe79e14..3ed43a5f1fd3 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -164,7 +164,6 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun) struct se_session *se_sess = se_cmd->se_sess; struct se_node_acl *nacl = se_sess->se_node_acl; struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; - unsigned long flags; rcu_read_lock(); deve = target_nacl_find_deve(nacl, unpacked_lun); @@ -195,10 +194,6 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun) se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); se_tmr->tmr_dev = rcu_dereference_raw(se_lun->lun_se_dev); - spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); - list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); - spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); - return 0; } EXPORT_SYMBOL(transport_lookup_tmr_lun); diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 64481a3a34d4..f8ba730fa1cf 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -3463,6 +3463,10 @@ int transport_generic_handle_tmr( unsigned long flags; bool aborted = false; + spin_lock_irqsave(&cmd->se_dev->se_tmr_lock, flags); + list_add_tail(&cmd->se_tmr_req->tmr_list, &cmd->se_dev->dev_tmr_list); + spin_unlock_irqrestore(&cmd->se_dev->se_tmr_lock, flags); + spin_lock_irqsave(&cmd->t_state_lock, flags); if (cmd->transport_state & CMD_T_ABORTED) { aborted = true; -- 2.43.0