From patchwork Fri May 26 14:27:23 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: 9750631 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 1F2C560249 for ; Fri, 26 May 2017 14:27:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1236D283D2 for ; Fri, 26 May 2017 14:27:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 06FF0283DA; Fri, 26 May 2017 14:27:58 +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 98D24283D2 for ; Fri, 26 May 2017 14:27:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1034365AbdEZO14 (ORCPT ); Fri, 26 May 2017 10:27:56 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:35690 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030748AbdEZO1y (ORCPT ); Fri, 26 May 2017 10:27:54 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4QEOEt3076351 for ; Fri, 26 May 2017 10:27:54 -0400 Received: from e13.ny.us.ibm.com (e13.ny.us.ibm.com [129.33.205.203]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ap7mcsxc9-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 26 May 2017 10:27:54 -0400 Received: from localhost by e13.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 26 May 2017 10:27:53 -0400 Received: from b01cxnp22033.gho.pok.ibm.com (9.57.198.23) by e13.ny.us.ibm.com (146.89.104.200) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Fri, 26 May 2017 10:27:49 -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 v4QERlbW43384998; Fri, 26 May 2017 14:27:49 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2AF19B2050; Fri, 26 May 2017 10:25:26 -0400 (EDT) Received: from localhost.localdomain (unknown [9.85.196.247]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP id 964DBB2046; Fri, 26 May 2017 10:25:25 -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 4/4] tcmu: Make dev_config configurable Date: Fri, 26 May 2017 09:27:23 -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: 17052614-0008-0000-0000-0000022AFD57 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007121; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000212; SDB=6.00865865; UDB=6.00430031; IPR=6.00645725; 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 14:27:51 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17052614-0009-0000-0000-0000356BDB2F Message-Id: <1495808843-40222-5-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: 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 allows for userspace to change the device path after it has been created. Thus giving the user the ability to change the path. The use case for this is to allow for virtual optical to have media change. Signed-off-by: Bryant G. Ly --- drivers/target/target_core_user.c | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index c8c84b7..3036a57 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -1548,6 +1548,45 @@ static ssize_t tcmu_cmd_time_out_store(struct config_item *item, const char *pag } CONFIGFS_ATTR(tcmu_, cmd_time_out); +static ssize_t tcmu_dev_path_show(struct config_item *item, char *page) +{ + 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); + + return snprintf(page, PAGE_SIZE, "%s\n", udev->dev_config); +} + +static ssize_t tcmu_dev_path_store(struct config_item *item, const char *page, + size_t count) +{ + 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); + char *copy = NULL; + + copy = kstrdup(page, GFP_KERNEL); + + if (!copy) + return -EINVAL; + + strcpy(udev->dev_config, copy); + + /* 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_, dev_path); + static ssize_t tcmu_dev_size_show(struct config_item *item, char *page) { struct se_dev_attrib *da = container_of(to_config_group(item), @@ -1626,6 +1665,7 @@ CONFIGFS_ATTR(tcmu_, emulate_write_cache); struct configfs_attribute *tcmu_attrib_attrs[] = { &tcmu_attr_cmd_time_out, + &tcmu_attr_dev_path, &tcmu_attr_dev_size, &tcmu_attr_emulate_write_cache, NULL,