From patchwork Fri Nov 2 12:21:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Wilck X-Patchwork-Id: 10667671 X-Patchwork-Delegate: christophe.varoqui@free.fr 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 BA68514E2 for ; Mon, 5 Nov 2018 09:45:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A89B429461 for ; Mon, 5 Nov 2018 09:45:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9ACE929543; Mon, 5 Nov 2018 09:45:43 +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 mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 16E6929461 for ; Mon, 5 Nov 2018 09:45:43 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E8D5630832CE; Mon, 5 Nov 2018 09:45:40 +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 D5F7B60F8C; Mon, 5 Nov 2018 09:45:39 +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 1FF4C4CA95; Mon, 5 Nov 2018 09:45:37 +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 wA2CNTFF011711 for ; Fri, 2 Nov 2018 08:23:29 -0400 Received: by smtp.corp.redhat.com (Postfix) id 32A20105704B; Fri, 2 Nov 2018 12:23:29 +0000 (UTC) Delivered-To: dm-devel@redhat.com Received: from mx1.redhat.com (ext-mx12.extmail.prod.ext.phx2.redhat.com [10.5.110.41]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 251D61057047; Fri, 2 Nov 2018 12:23:29 +0000 (UTC) Received: from smtp2.provo.novell.com (smtp2.provo.novell.com [137.65.250.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E8506308A964; Fri, 2 Nov 2018 12:23:27 +0000 (UTC) Received: from apollon.suse.de.de (prv-ext-foundry1int.gns.novell.com [137.65.251.240]) by smtp2.provo.novell.com with ESMTP (TLS encrypted); Fri, 02 Nov 2018 06:23:19 -0600 From: Martin Wilck To: Christophe Varoqui , Benjamin Marzinski Date: Fri, 2 Nov 2018 13:21:17 +0100 Message-Id: <20181102122125.30906-14-mwilck@suse.com> In-Reply-To: <20181102122125.30906-1-mwilck@suse.com> References: <20181102122125.30906-1-mwilck@suse.com> MIME-Version: 1.0 X-Greylist: Sender passed SPF test, Sender IP whitelisted by DNSRBL, ACL 216 matched, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Fri, 02 Nov 2018 12:23:28 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Fri, 02 Nov 2018 12:23:28 +0000 (UTC) for IP:'137.65.250.81' DOMAIN:'smtp2.provo.novell.com' HELO:'smtp2.provo.novell.com' FROM:'mwilck@suse.com' RCPT:'' X-RedHat-Spam-Score: -2.301 (RCVD_IN_DNSWL_MED, SPF_PASS) 137.65.250.81 smtp2.provo.novell.com 137.65.250.81 smtp2.provo.novell.com X-Scanned-By: MIMEDefang 2.84 on 10.5.110.41 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-loop: dm-devel@redhat.com X-Mailman-Approved-At: Mon, 05 Nov 2018 04:40:58 -0500 Cc: dm-devel@redhat.com, Martin Wilck Subject: [dm-devel] [PATCH v5 13/21] libmultipath: clariion checker: leave unsupported paths alone 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: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Mon, 05 Nov 2018 09:45:42 +0000 (UTC) X-Virus-Scanned: ClamAV using ClamSMTP A checker shouldn't set the path state to PATH_DOWN if it fails to obtain information about the path in the first place. Add logic to the checker to distinguish a failed path from an unsupported path. Reviewed-by: Benjamin Marzinski Signed-off-by: Martin Wilck --- libmultipath/checkers/emc_clariion.c | 54 ++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/libmultipath/checkers/emc_clariion.c b/libmultipath/checkers/emc_clariion.c index f8e55b93..6fc89113 100644 --- a/libmultipath/checkers/emc_clariion.c +++ b/libmultipath/checkers/emc_clariion.c @@ -20,6 +20,11 @@ #define INQUIRY_CMD 0x12 #define INQUIRY_CMDLEN 6 #define HEAVY_CHECK_COUNT 10 +#define SCSI_COMMAND_TERMINATED 0x22 +#define SCSI_CHECK_CONDITION 0x2 +#define RECOVERED_ERROR 0x01 +#define ILLEGAL_REQUEST 0x05 +#define SG_ERR_DRIVER_SENSE 0x08 /* * Mechanism to track CLARiiON inactive snapshot LUs. @@ -130,7 +135,9 @@ int libcheck_check (struct checker * c) (struct emc_clariion_checker_path_context *)c->context; char wwnstr[33]; int ret; + int retry_emc = 5; +retry: memset(&io_hdr, 0, sizeof (struct sg_io_hdr)); memset(sense_buffer, 0, 128); memset(sb, 0, SENSE_BUFF_LEN); @@ -145,13 +152,60 @@ int libcheck_check (struct checker * c) io_hdr.timeout = c->timeout * 1000; io_hdr.pack_id = 0; if (ioctl(c->fd, SG_IO, &io_hdr) < 0) { + if (errno == ENOTTY) { + c->msgid = CHECKER_MSGID_UNSUPPORTED; + return PATH_WILD; + } c->msgid = MSG_CLARIION_QUERY_FAILED; return PATH_DOWN; } + if (io_hdr.info & SG_INFO_OK_MASK) { + switch (io_hdr.host_status) { + case DID_BUS_BUSY: + case DID_ERROR: + case DID_SOFT_ERROR: + case DID_TRANSPORT_DISRUPTED: + /* Transport error, retry */ + if (--retry_emc) + goto retry; + break; + default: + break; + } + } + + if (SCSI_CHECK_CONDITION == io_hdr.status || + SCSI_COMMAND_TERMINATED == io_hdr.status || + SG_ERR_DRIVER_SENSE == (0xf & io_hdr.driver_status)) { + if (io_hdr.sbp && (io_hdr.sb_len_wr > 2)) { + unsigned char *sbp = io_hdr.sbp; + int sense_key; + + if (sbp[0] & 0x2) + sense_key = sbp[1] & 0xf; + else + sense_key = sbp[2] & 0xf; + + if (sense_key == ILLEGAL_REQUEST) { + c->msgid = CHECKER_MSGID_UNSUPPORTED; + return PATH_WILD; + } else if (sense_key != RECOVERED_ERROR) { + condlog(1, "emc_clariion_checker: INQUIRY failed with sense key %02x", + sense_key); + c->msgid = MSG_CLARIION_QUERY_ERROR; + return PATH_DOWN; + } + } + } + + if (io_hdr.info & SG_INFO_OK_MASK) { + condlog(1, "emc_clariion_checker: INQUIRY failed without sense, status %02x", + io_hdr.status); c->msgid = MSG_CLARIION_QUERY_ERROR; return PATH_DOWN; } + if (/* Verify the code page - right page & revision */ sense_buffer[1] != 0xc0 || sense_buffer[9] != 0x00) { c->msgid = MSG_CLARIION_UNIT_REPORT;