From patchwork Thu Sep 24 04:59:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Marzinski X-Patchwork-Id: 11796115 X-Patchwork-Delegate: christophe.varoqui@free.fr Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 340516CB for ; Thu, 24 Sep 2020 05:00:41 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A090E206C1 for ; Thu, 24 Sep 2020 05:00:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="eAzbhMBH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A090E206C1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=dm-devel-bounces@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600923639; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=x/jsplALy+29Vv4BUD2SDfvZL0D/zUjnu22T7qqhIQM=; b=eAzbhMBH/2dBMFBSKhldKnO5u8Jr/K0WWZWLU+8Ccbl/YG5HM8bWgvdC7/hKFGgDBVnQWq 9iJxQjvkmXk1oefIoy6zZXIYcxy/uNUE9fKcV+95sfMSoEpD5GsV3G3sf1LAEQaBE9XzAT zhYYpOO0LJWyBrzC0SUa+rTxHmQ74co= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-474-_F1rcIJsOsi8pOskbHFp_w-1; Thu, 24 Sep 2020 01:00:37 -0400 X-MC-Unique: _F1rcIJsOsi8pOskbHFp_w-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 33EFC85B683; Thu, 24 Sep 2020 05:00:33 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 14DEA5578B; Thu, 24 Sep 2020 05:00:33 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id DBEBA44A6A; Thu, 24 Sep 2020 05:00:32 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 08O4xbXK024610 for ; Thu, 24 Sep 2020 00:59:37 -0400 Received: by smtp.corp.redhat.com (Postfix) id 5802C10013C1; Thu, 24 Sep 2020 04:59:37 +0000 (UTC) Delivered-To: dm-devel@redhat.com Received: from octiron.msp.redhat.com (octiron.msp.redhat.com [10.15.80.209]) by smtp.corp.redhat.com (Postfix) with ESMTPS id BA6401002C05; Thu, 24 Sep 2020 04:59:33 +0000 (UTC) Received: from octiron.msp.redhat.com (localhost.localdomain [127.0.0.1]) by octiron.msp.redhat.com (8.14.9/8.14.9) with ESMTP id 08O4xWDi017458; Wed, 23 Sep 2020 23:59:32 -0500 Received: (from bmarzins@localhost) by octiron.msp.redhat.com (8.14.9/8.14.9/Submit) id 08O4xWiw017457; Wed, 23 Sep 2020 23:59:32 -0500 From: Benjamin Marzinski To: Christophe Varoqui Date: Wed, 23 Sep 2020 23:59:28 -0500 Message-Id: <1600923569-17412-3-git-send-email-bmarzins@redhat.com> In-Reply-To: <1600923569-17412-1-git-send-email-bmarzins@redhat.com> References: <1600923569-17412-1-git-send-email-bmarzins@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-loop: dm-devel@redhat.com Cc: device-mapper development , Martin Wilck Subject: [dm-devel] [RFC PATCH v2 2/3] libmultipath: add uid failback for dasd devices X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Add failback code to get the uid for dasd devices from sysfs. Copied from dasdinfo Reviewed-by: Martin Wilck Signed-off-by: Benjamin Marzinski --- libmultipath/defaults.h | 1 + libmultipath/discovery.c | 37 ++++++++++++++++++++++++++++++++++++- 2 files changed, 37 insertions(+), 1 deletion(-) diff --git a/libmultipath/defaults.h b/libmultipath/defaults.h index 39a5e415..947ba467 100644 --- a/libmultipath/defaults.h +++ b/libmultipath/defaults.h @@ -8,6 +8,7 @@ */ #define DEFAULT_UID_ATTRIBUTE "ID_SERIAL" #define DEFAULT_NVME_UID_ATTRIBUTE "ID_WWN" +#define DEFAULT_DASD_UID_ATTRIBUTE "ID_UID" #define DEFAULT_UDEVDIR "/dev" #define DEFAULT_MULTIPATHDIR "/" LIB_STRING "/multipath" #define DEFAULT_SELECTOR "service-time 0" diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c index 000f4c96..f650534f 100644 --- a/libmultipath/discovery.c +++ b/libmultipath/discovery.c @@ -1953,12 +1953,44 @@ get_vpd_uid(struct path * pp) return get_vpd_sysfs(parent, 0x83, pp->wwid, WWID_SIZE); } +/* based on code from s390-tools/dasdinfo/dasdinfo.c */ +static ssize_t dasd_get_uid(struct path *pp) +{ + struct udev_device *parent; + char value[80]; + char *p; + int i; + + parent = udev_device_get_parent_with_subsystem_devtype(pp->udev, "ccw", + NULL); + if (!parent) + return -1; + + if (sysfs_attr_get_value(parent, "uid", value, 80) < 0) + return -1; + + p = value - 1; + /* look for the 4th '.' and cut there */ + for (i = 0; i < 4; i++) { + p = index(p + 1, '.'); + if (!p) + break; + } + if (p) + *p = '\0'; + + return strlcpy(pp->wwid, value, WWID_SIZE); +} + static ssize_t uid_fallback(struct path *pp, int path_state, const char **origin) { ssize_t len = -1; - if (pp->bus == SYSFS_BUS_SCSI) { + if (pp->bus == SYSFS_BUS_CCW) { + len = dasd_get_uid(pp); + *origin = "sysfs"; + } else if (pp->bus == SYSFS_BUS_SCSI) { len = get_vpd_uid(pp); *origin = "sysfs"; if (len < 0 && path_state == PATH_UP) { @@ -2006,6 +2038,9 @@ static bool has_uid_fallback(struct path *pp) !strcmp(pp->uid_attribute, ""))) || (pp->bus == SYSFS_BUS_NVME && (!strcmp(pp->uid_attribute, DEFAULT_NVME_UID_ATTRIBUTE) || + !strcmp(pp->uid_attribute, ""))) || + (pp->bus == SYSFS_BUS_CCW && + (!strcmp(pp->uid_attribute, DEFAULT_DASD_UID_ATTRIBUTE) || !strcmp(pp->uid_attribute, "")))); }