From patchwork Tue May 30 18:31:19 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: 9755113 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 F0105602BF for ; Tue, 30 May 2017 18:31:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E047826E56 for ; Tue, 30 May 2017 18:31:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D5102283FD; Tue, 30 May 2017 18:31:42 +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=unavailable 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 E319726E56 for ; Tue, 30 May 2017 18:31:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750985AbdE3Sbi (ORCPT ); Tue, 30 May 2017 14:31:38 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47758 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751063AbdE3Sbg (ORCPT ); Tue, 30 May 2017 14:31:36 -0400 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4UITVAb087833 for ; Tue, 30 May 2017 14:31:36 -0400 Received: from e17.ny.us.ibm.com (e17.ny.us.ibm.com [129.33.205.207]) by mx0a-001b2d01.pphosted.com with ESMTP id 2asc6jdg4v-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 30 May 2017 14:31:35 -0400 Received: from localhost by e17.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 30 May 2017 14:31:33 -0400 Received: from b01cxnp22035.gho.pok.ibm.com (9.57.198.25) by e17.ny.us.ibm.com (146.89.104.204) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 30 May 2017 14:31:30 -0400 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4UIVTvW65077272; Tue, 30 May 2017 18:31:29 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 02C11112054; Tue, 30 May 2017 14:31:33 -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 9F321112047; Tue, 30 May 2017 14:31:32 -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 4/5] tcmu: Make dev_config configurable Date: Tue, 30 May 2017 13:31:19 -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: 17053018-0040-0000-0000-0000034E76BA 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 18:31:32 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17053018-0041-0000-0000-00000742B120 Message-Id: <1496169080-58746-5-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: 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 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 | 41 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index c8c84b7..7575bc9 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -1548,6 +1548,46 @@ 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; + int ret; + + copy = kstrdup(page, GFP_KERNEL); + if (!copy) { + kree(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 +1666,7 @@ 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,