From patchwork Wed Dec 5 12:18:36 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Disseldorp X-Patchwork-Id: 10713959 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 398E217D5 for ; Wed, 5 Dec 2018 12:18:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2A0092C13E for ; Wed, 5 Dec 2018 12:18:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1DCCE2C2B3; Wed, 5 Dec 2018 12:18:53 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 B66382C2C2 for ; Wed, 5 Dec 2018 12:18:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727591AbeLEMSw (ORCPT ); Wed, 5 Dec 2018 07:18:52 -0500 Received: from mx2.suse.de ([195.135.220.15]:46214 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727182AbeLEMSt (ORCPT ); Wed, 5 Dec 2018 07:18:49 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id D6453B7C2; Wed, 5 Dec 2018 12:18:46 +0000 (UTC) From: David Disseldorp To: target-devel@vger.kernel.org Cc: bvanassche@acm.org, lduncan@suse.com, hare@suse.com, bly@catalogicsoftware.com, r.bolshakov@yadro.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, David Disseldorp Subject: [PATCH v7 3/5] target: add device vendor_id configfs attribute Date: Wed, 5 Dec 2018 13:18:36 +0100 Message-Id: <20181205121838.23982-4-ddiss@suse.de> X-Mailer: git-send-email 2.13.7 In-Reply-To: <20181205121838.23982-1-ddiss@suse.de> References: <20181205121838.23982-1-ddiss@suse.de> 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 The vendor_id attribute will allow for the modification of the T10 Vendor Identification string returned in inquiry responses. Its value can be viewed and modified via the ConfigFS path at: target/core/$backstore/$name/wwn/vendor_id "LIO-ORG" remains the default value, which is set when the backstore device is enabled. Signed-off-by: David Disseldorp Reviewed-by: Roman Bolshakov --- drivers/target/target_core_configfs.c | 70 +++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 8277bcf81d6e..f099c2ae451f 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -1217,6 +1217,74 @@ static struct t10_wwn *to_t10_wwn(struct config_item *item) } /* + * STANDARD and VPD page 0x80 T10 Vendor Identification + */ +static ssize_t target_wwn_vendor_id_show(struct config_item *item, + char *page) +{ + return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); +} + +static ssize_t target_wwn_vendor_id_store(struct config_item *item, + const char *page, size_t count) +{ + struct t10_wwn *t10_wwn = to_t10_wwn(item); + struct se_device *dev = t10_wwn->t10_dev; + /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ + unsigned char buf[INQUIRY_VENDOR_LEN + 2]; + char *stripped = NULL; + size_t len; + int i; + + len = strlcpy(buf, page, sizeof(buf)); + if (len < sizeof(buf)) { + /* Strip any newline added from userspace. */ + stripped = strstrip(buf); + len = strlen(stripped); + } + if (len > INQUIRY_VENDOR_LEN) { + pr_err("Emulated T10 Vendor Identification exceeds" + " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) + "\n"); + return -EOVERFLOW; + } + + /* + * SPC 4.3.1: + * ASCII data fields shall contain only ASCII printable characters (i.e., + * code values 20h to 7Eh) and may be terminated with one or more ASCII + * null (00h) characters. + */ + for (i = 0; i < len; i++) { + if ((stripped[i] < 0x20) || (stripped[i] > 0x7E)) { + pr_err("Emulated T10 Vendor Identification contains" + " non-ASCII-printable characters\n"); + return -EINVAL; + } + } + + /* + * Check to see if any active exports exist. If they do exist, fail + * here as changing this information on the fly (underneath the + * initiator side OS dependent multipath code) could cause negative + * effects. + */ + if (dev->export_count) { + pr_err("Unable to set T10 Vendor Identification while" + " active %d exports exist\n", dev->export_count); + return -EINVAL; + } + + BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); + strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); + + pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" + " %s\n", dev->t10_wwn.vendor); + + return count; +} + +/* * VPD page 0x80 Unit serial */ static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, @@ -1362,6 +1430,7 @@ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); /* VPD page 0x83 Association: SCSI Target Device */ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); +CONFIGFS_ATTR(target_wwn_, vendor_id); CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); @@ -1369,6 +1438,7 @@ CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); static struct configfs_attribute *target_core_dev_wwn_attrs[] = { + &target_wwn_attr_vendor_id, &target_wwn_attr_vpd_unit_serial, &target_wwn_attr_vpd_protocol_identifier, &target_wwn_attr_vpd_assoc_logical_unit,