From patchwork Thu Oct 24 11:45:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Suchanek X-Patchwork-Id: 11209191 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 69CA9112B for ; Thu, 24 Oct 2019 11:46:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4963621872 for ; Thu, 24 Oct 2019 11:46:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727498AbfJXLqy (ORCPT ); Thu, 24 Oct 2019 07:46:54 -0400 Received: from mx2.suse.de ([195.135.220.15]:48888 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726389AbfJXLqy (ORCPT ); Thu, 24 Oct 2019 07:46:54 -0400 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 DDB76AD2C; Thu, 24 Oct 2019 11:46:51 +0000 (UTC) From: Michal Suchanek To: Hannes Reinecke Cc: Michal Suchanek , "James E.J. Bottomley" , "Martin K. Petersen" , Jens Axboe , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC] scsi: blacklist: add VMware ESXi cdrom - broken tray emulation. Date: Thu, 24 Oct 2019 13:45:35 +0200 Message-Id: <20191024114535.1559-1-msuchanek@suse.de> X-Mailer: git-send-email 2.23.0 In-Reply-To: <15c972ea-5b3a-487f-7be5-a62d780896da@suse.de> References: <15c972ea-5b3a-487f-7be5-a62d780896da@suse.de> MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The WMware ESXi cdrom identifies itself as: sr 0:0:0:0: [sr0] scsi3-mmc drive: vendor: "NECVMWarVMware SATA CD001.00" model: "VMware SATA CD001.00" with the following get_capabilities print in sr.c: sr_printk(KERN_INFO, cd, "scsi3-mmc drive: vendor: \"%s\" model: \"%s\"\n", cd->device->vendor, cd->device->model); The model looks like reliable identification while vendor does not. The drive claims to have a tray and claims to be able to close it. However, the UI has no notion of a tray - when medium is ejected it is dropped in the floor and the user must select a medium again before the drive can be re-loaded. On the kernel side the tray_move call to close the tray succeeds but the drive state does not change as a result of the call. The drive does not in fact emulate the tray state. There are two ways to get the medium state. One is the SCSI status: Physical drive: Fixed format, current; Sense key: Not Ready Additional sense: Medium not present - tray open Raw sense data (in hex): 70 00 02 00 00 00 00 0a 00 00 00 00 3a 02 00 00 00 00 Fixed format, current; Sense key: Not Ready Additional sense: Medium not present - tray closed Raw sense data (in hex): 70 00 02 00 00 00 00 0a 00 00 00 00 3a 01 00 00 00 00 VMware ESXi: Fixed format, current; Sense key: Not Ready Additional sense: Medium not present Info fld=0x0 [0] Raw sense data (in hex): f0 00 02 00 00 00 00 0a 00 00 00 00 3a 00 00 00 00 00 So the tray state is not reported here. Other is medium status which the kernel prefers if available. Adding a print here gives: cdrom: get_media_event success: code = 0, door_open = 1, medium_present = 0 door_open is interpreted as open tray. This is fine so long as tray_move would close the tray when requested or report an error which never happens on VMware ESXi servers (5.5 and 6.5 tested). This is a popular virtualization platform so a workaround is worthwhile. Signed-off-by: Michal Suchanek --- drivers/scsi/scsi_devinfo.c | 15 +++++++++------ drivers/scsi/sr.c | 6 ++++++ include/scsi/scsi_devinfo.h | 7 ++++++- 3 files changed, 21 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c index df14597752ec..8c1cb38f862b 100644 --- a/drivers/scsi/scsi_devinfo.c +++ b/drivers/scsi/scsi_devinfo.c @@ -252,6 +252,7 @@ static struct { {"TOSHIBA", "CD-ROM", NULL, BLIST_ISROM}, {"Traxdata", "CDR4120", NULL, BLIST_NOLUN}, /* locks up */ {"USB2.0", "SMARTMEDIA/XD", NULL, BLIST_FORCELUN | BLIST_INQUIRY_36}, + {"VMware", "VMware", NULL, BLIST_MATCH_VENDOR | BLIST_TRAY}, {"WangDAT", "Model 2600", "01.7", BLIST_SELECT_NO_ATN}, {"WangDAT", "Model 3200", "02.2", BLIST_SELECT_NO_ATN}, {"WangDAT", "Model 1300", "02.4", BLIST_SELECT_NO_ATN}, @@ -454,10 +455,11 @@ static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor, /* * vendor strings must be an exact match */ - if (vmax != strnlen(devinfo->vendor, - sizeof(devinfo->vendor)) || - memcmp(devinfo->vendor, vskip, vmax)) - continue; + if (!devinfo->flags & BLIST_MATCH_VENDOR) + if (vmax != strnlen(devinfo->vendor, + sizeof(devinfo->vendor)) || + memcmp(devinfo->vendor, vskip, vmax)) + continue; /* * @model specifies the full string, and @@ -468,8 +470,9 @@ static struct scsi_dev_info_list *scsi_dev_info_list_find(const char *vendor, continue; return devinfo; } else { - if (!memcmp(devinfo->vendor, vendor, - sizeof(devinfo->vendor)) && + if ((!memcmp(devinfo->vendor, vendor, + sizeof(devinfo->vendor)) + || (devinfo->flags & BLIST_MATCH_VENDOR)) && !memcmp(devinfo->model, model, sizeof(devinfo->model))) return devinfo; diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index 4664fdf75c0f..c5468829be34 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -58,6 +58,7 @@ #include #include #include /* For the door lock/unlock commands */ +#include #include "scsi_logging.h" #include "sr.h" @@ -922,6 +923,11 @@ static void get_capabilities(struct scsi_cd *cd) buffer[n + 4] & 0x20 ? "xa/form2 " : "", /* can read xa/from2 */ buffer[n + 5] & 0x01 ? "cdda " : "", /* can read audio data */ loadmech[buffer[n + 6] >> 5]); + if (cd->device->sdev_bflags & BLIST_TRAY) { + buffer[n + 6] &= ~(0xff << 5); + sr_printk(KERN_INFO, cd, + "Tray emulation bug workaround: tray -> caddy\n"); + } if ((buffer[n + 6] >> 5) == 0) /* caddy drives can't close tray... */ cd->cdi.mask |= CDC_CLOSE_TRAY; diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h index 3fdb322d4c4b..dbaf07888c16 100644 --- a/include/scsi/scsi_devinfo.h +++ b/include/scsi/scsi_devinfo.h @@ -67,8 +67,13 @@ #define BLIST_RETRY_ITF ((__force blist_flags_t)(1ULL << 32)) /* Always retry ABORTED_COMMAND with ASC 0xc1 */ #define BLIST_RETRY_ASC_C1 ((__force blist_flags_t)(1ULL << 33)) +/* Device reports to have a tray but it cannot be opearted reliably */ +#define BLIST_TRAY ((__force blist_flags_t)(1ULL << 34)) +/* Vendor string is bogus */ +#define BLIST_MATCH_VENDOR ((__force blist_flags_t)(1ULL << 35)) -#define __BLIST_LAST_USED BLIST_RETRY_ASC_C1 + +#define __BLIST_LAST_USED BLIST_MATCH_VENDOR #define __BLIST_HIGH_UNUSED (~(__BLIST_LAST_USED | \ (__force blist_flags_t) \