From patchwork Fri May 26 14:27:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Bryant G. Ly" X-Patchwork-Id: 9750621 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4F8D160249 for ; Fri, 26 May 2017 14:27:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4268D280B0 for ; Fri, 26 May 2017 14:27:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 37479283D2; Fri, 26 May 2017 14:27:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D6528280B0 for ; Fri, 26 May 2017 14:27:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762371AbdEZO1v (ORCPT ); Fri, 26 May 2017 10:27:51 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:45718 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762128AbdEZO1u (ORCPT ); Fri, 26 May 2017 10:27:50 -0400 Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4QEODT7113456 for ; Fri, 26 May 2017 10:27:49 -0400 Received: from e16.ny.us.ibm.com (e16.ny.us.ibm.com [129.33.205.206]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ap8vrfwbf-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 26 May 2017 10:27:49 -0400 Received: from localhost by e16.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 26 May 2017 10:27:48 -0400 Received: from b01cxnp22033.gho.pok.ibm.com (9.57.198.23) by e16.ny.us.ibm.com (146.89.104.203) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Fri, 26 May 2017 10:27:45 -0400 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4QERjlB43384990; Fri, 26 May 2017 14:27:45 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 99C4AB2046; Fri, 26 May 2017 10:25:21 -0400 (EDT) Received: from localhost.localdomain (unknown [9.85.196.247]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP id 1EA2BB2054; Fri, 26 May 2017 10:25:21 -0400 (EDT) From: "Bryant G. Ly" To: nab@linux-iscsi.org, mchristi@redhat.com Cc: seroyer@linux.vnet.ibm.com, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, "Bryant G. Ly" Subject: [PATCH v1 2/4] tcmu: Add netlink for device reconfiguration Date: Fri, 26 May 2017 09:27:21 -0500 X-Mailer: git-send-email 2.5.4 (Apple Git-61) In-Reply-To: <1495808843-40222-1-git-send-email-bryantly@linux.vnet.ibm.com> References: <1495808843-40222-1-git-send-email-bryantly@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17052614-0024-0000-0000-0000027C87E6 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007121; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000212; SDB=6.00865864; UDB=6.00430031; IPR=6.00645726; BA=6.00005375; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015595; XFM=3.00000015; UTC=2017-05-26 14:27:47 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17052614-0025-0000-0000-0000442556C9 Message-Id: <1495808843-40222-3-git-send-email-bryantly@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-26_09:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1705260265 Sender: target-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This gives tcmu the ability to handle events that can cause reconfiguration, such as resize, path changes, write_cache, etc... Signed-off-by: Bryant G. Ly Reviewed-By: Mike Christie --- drivers/target/target_core_user.c | 12 ++++++++++++ include/uapi/linux/target_core_user.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 0c797cc..ae91822 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -1562,6 +1562,7 @@ static ssize_t tcmu_emulate_write_cache_store(struct config_item *item, { struct se_dev_attrib *da = container_of(to_config_group(item), struct se_dev_attrib, da_group); + struct tcmu_dev *udev = TCMU_DEV(da->da_dev); int val; int ret; @@ -1570,6 +1571,17 @@ static ssize_t tcmu_emulate_write_cache_store(struct config_item *item, return ret; da->emulate_write_cache = val; + + /* Check if device has been configured before */ + if (tcmu_dev_configured(udev)) { + ret = tcmu_netlink_event(TCMU_CMD_RECONFIG_DEVICE, + udev->uio_info.name, + udev->uio_info.uio_dev->minor); + if (ret) { + pr_err("Unable to reconfigure device\n"); + return ret; + } + } return count; } CONFIGFS_ATTR(tcmu_, emulate_write_cache); diff --git a/include/uapi/linux/target_core_user.h b/include/uapi/linux/target_core_user.h index af17b41..403a61f 100644 --- a/include/uapi/linux/target_core_user.h +++ b/include/uapi/linux/target_core_user.h @@ -130,6 +130,7 @@ enum tcmu_genl_cmd { TCMU_CMD_UNSPEC, TCMU_CMD_ADDED_DEVICE, TCMU_CMD_REMOVED_DEVICE, + TCMU_CMD_RECONFIG_DEVICE, __TCMU_CMD_MAX, }; #define TCMU_CMD_MAX (__TCMU_CMD_MAX - 1)