From patchwork Tue May 30 18:31:17 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: 9755103 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 38299602BF for ; Tue, 30 May 2017 18:31:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 231D62785D for ; Tue, 30 May 2017 18:31:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 17E12283F5; Tue, 30 May 2017 18:31:35 +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 ABE9F26E56 for ; Tue, 30 May 2017 18:31:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750993AbdE3Sba (ORCPT ); Tue, 30 May 2017 14:31:30 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:59217 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750970AbdE3Sb3 (ORCPT ); Tue, 30 May 2017 14:31:29 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4UISw8j053869 for ; Tue, 30 May 2017 14:31:28 -0400 Received: from e19.ny.us.ibm.com (e19.ny.us.ibm.com [129.33.205.209]) by mx0b-001b2d01.pphosted.com with ESMTP id 2asbx6xas7-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 30 May 2017 14:31:28 -0400 Received: from localhost by e19.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 30 May 2017 14:31:27 -0400 Received: from b01cxnp22036.gho.pok.ibm.com (9.57.198.26) by e19.ny.us.ibm.com (146.89.104.206) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 30 May 2017 14:31:26 -0400 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp22036.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4UIVPQM52822242; Tue, 30 May 2017 18:31:25 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 46464112034; Tue, 30 May 2017 14:31:29 -0400 (EDT) Received: from bryants-mbp-3.rchland.ibm.com (unknown [9.10.80.125]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP id E5882112047; Tue, 30 May 2017 14:31:28 -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 v2 2/5] tcmu: Add netlink for device reconfiguration Date: Tue, 30 May 2017 13:31:17 -0500 X-Mailer: git-send-email 2.5.4 (Apple Git-61) In-Reply-To: <1496169080-58746-1-git-send-email-bryantly@linux.vnet.ibm.com> References: <1496169080-58746-1-git-send-email-bryantly@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17053018-0056-0000-0000-0000037576DC X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007146; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000212; SDB=6.00867831; UDB=6.00431217; IPR=6.00647710; BA=6.00005387; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015648; XFM=3.00000015; UTC=2017-05-30 18:31:27 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17053018-0057-0000-0000-000007ABAFFE Message-Id: <1496169080-58746-3-git-send-email-bryantly@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-30_12:, , 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-1705300337 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@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)