From patchwork Mon Nov 19 21:06:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Disseldorp X-Patchwork-Id: 10689463 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 D40D614BD for ; Mon, 19 Nov 2018 21:06:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C7F9C29FF6 for ; Mon, 19 Nov 2018 21:06:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BC2B82A550; Mon, 19 Nov 2018 21:06:50 +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=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 41E6E2A4C7 for ; Mon, 19 Nov 2018 21:06:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730973AbeKTHcQ (ORCPT ); Tue, 20 Nov 2018 02:32:16 -0500 Received: from mx2.suse.de ([195.135.220.15]:53360 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730958AbeKTHcQ (ORCPT ); Tue, 20 Nov 2018 02:32:16 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 515EDB06F; Mon, 19 Nov 2018 21:06:47 +0000 (UTC) From: David Disseldorp To: target-devel@vger.kernel.org Cc: hare@suse.com, lduncan@suse.com, cvubrugier@fastmail.fm, Mike Christie , martin.petersen@oracle.com, linux-scsi@vger.kernel.org, David Disseldorp Subject: [PATCH v3 3/4] target: add device vendor_id configfs attribute Date: Mon, 19 Nov 2018 22:06:35 +0100 Message-Id: <20181119210636.22979-4-ddiss@suse.de> X-Mailer: git-send-email 2.13.7 In-Reply-To: <20181119210636.22979-1-ddiss@suse.de> References: <20181119210636.22979-1-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 --- drivers/target/target_core_configfs.c | 55 +++++++++++++++++++++++++++++++++++ include/target/target_core_base.h | 3 +- 2 files changed, 57 insertions(+), 1 deletion(-) diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index f6b1549f4142..64e95376d998 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -1211,6 +1211,59 @@ 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, "T10 Vendor Identification: %." + __stringify(INQUIRY_VENDOR_IDENTIFIER_LEN) "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; + /* +1 to ensure buf is zero terminated for stripping */ + unsigned char buf[INQUIRY_VENDOR_IDENTIFIER_LEN + 1]; + + if (strlen(page) > INQUIRY_VENDOR_IDENTIFIER_LEN) { + pr_err("Emulated T10 Vendor Identification exceeds" + " INQUIRY_VENDOR_IDENTIFIER_LEN: %d\n", + INQUIRY_VENDOR_IDENTIFIER_LEN); + return -EOVERFLOW; + } + strncpy(buf, page, sizeof(buf)); + /* + * Check to see if any active $FABRIC_MOD 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 $FABRIC_MOD exports exist\n", + dev->export_count); + return -EINVAL; + } + + /* + * Assume ASCII encoding. Strip any newline added from userspace. + * The result may *not* be null terminated. + */ + strncpy(dev->t10_wwn.vendor, strstrip(buf), + INQUIRY_VENDOR_IDENTIFIER_LEN); + + pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" + " %." __stringify(INQUIRY_VENDOR_IDENTIFIER_LEN) "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, @@ -1356,6 +1409,7 @@ 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); @@ -1363,6 +1417,7 @@ 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, diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index e3bdb0550a59..45be5427326d 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -45,6 +45,7 @@ #define INQUIRY_VPD_SERIAL_LEN 254 /* Used by transport_get_inquiry_vpd_device_ident() */ #define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254 +#define INQUIRY_VENDOR_IDENTIFIER_LEN 8 /* Attempts before moving from SHORT to LONG */ #define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3 @@ -314,7 +315,7 @@ struct t10_vpd { }; struct t10_wwn { - char vendor[8]; + char vendor[INQUIRY_VENDOR_IDENTIFIER_LEN]; char model[16]; char revision[4]; char unit_serial[INQUIRY_VPD_SERIAL_LEN];