From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56BECC7EE2E for ; Mon, 27 Feb 2023 07:02:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229910AbjB0HCn (ORCPT ); Mon, 27 Feb 2023 02:02:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229451AbjB0HCk (ORCPT ); Mon, 27 Feb 2023 02:02:40 -0500 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6F471A495; Sun, 26 Feb 2023 23:02:38 -0800 (PST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 517DD1F8D4; Mon, 27 Feb 2023 07:02:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1677481357; h=from:from:reply-to: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; bh=G52KKZ0xD6rFHPvOmRSlgYtu0nGZqp70glW530+JIYs=; b=x9iCJosQDW1M6fY5ujwEGUZj9vgW3w765q0lexuHWY+2c9LXUZMj1PAkSQDNbiooE9hTc8 712ame1Pz253jwtCiz6uSk6Fxisw4as/7jbfPvDdERb1TYHeRENX3ywN7NBSk+TvYdjTes RbJbLAjOZjyYOpAznUVlEj0EaERetTU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1677481357; h=from:from:reply-to: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; bh=G52KKZ0xD6rFHPvOmRSlgYtu0nGZqp70glW530+JIYs=; b=4BTCqqR23qVEPmvjs7aWOYUerJBxRTfvbR3j/7eYI07qZqDnSYmW4Vks2UdGba8OYg+d0S U/tYUvTw1F/ivpBw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 194AD13912; Mon, 27 Feb 2023 07:02:37 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 5h1nBY1V/GP8DgAAMHmgww (envelope-from ); Mon, 27 Feb 2023 07:02:37 +0000 Message-ID: <0933dabe-2f3d-981d-72ff-43e1f2a2eb69@suse.de> Date: Mon, 27 Feb 2023 08:02:36 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.6.1 Subject: Re: [PATCH] scsi: core: Add BLIST_NO_ASK_VPD_SIZE for some VDASD Content-Language: en-US To: Lee Duncan , "James E.J. Bottomley" , "Martin K. Petersen" , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lee Duncan , Martin Wilck References: <20220928181350.9948-1-leeman.duncan@gmail.com> From: Hannes Reinecke In-Reply-To: <20220928181350.9948-1-leeman.duncan@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/28/22 20:13, Lee Duncan wrote: > From: Lee Duncan > > Some storage, such as AIX VDASD (virtual storage) and IBM 2076 > (front end) do not like the recent commit: > > commit c92a6b5d6335 ("scsi: core: Query VPD size before getting full page") > > That commit changed getting SCSI VPD pages so that we now read > just enough of the page to get the actual page size, then read > the whole page in a second read. The problem is that the above > mentioned hardware returns zero for the page size, because of > a firmware error. In such cases, until the firmware is fixed, > this new black flag says to revert to the original method of > reading the VPD pages, i.e. try to read as a whole buffer's > worth on the first try. > > Fixes: c92a6b5d6335 ("scsi: core: Query VPD size before getting full page") > Reported-by: Martin Wilck > Suggested-by: Hannes Reinecke > Signed-off-by: Lee Duncan > --- > drivers/scsi/scsi.c | 14 +++++++++++--- > drivers/scsi/scsi_devinfo.c | 3 ++- > drivers/scsi/scsi_scan.c | 3 +++ > include/scsi/scsi_device.h | 2 ++ > include/scsi/scsi_devinfo.h | 6 +++--- > 5 files changed, 21 insertions(+), 7 deletions(-) > > diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c > index c59eac7a32f2..f2db4b846190 100644 > --- a/drivers/scsi/scsi.c > +++ b/drivers/scsi/scsi.c > @@ -321,11 +321,19 @@ static int scsi_vpd_inquiry(struct scsi_device *sdev, unsigned char *buffer, > return get_unaligned_be16(&buffer[2]) + 4; > } > > -static int scsi_get_vpd_size(struct scsi_device *sdev, u8 page) > +static int scsi_get_vpd_size(struct scsi_device *sdev, u8 page, int buf_len) > { > unsigned char vpd_header[SCSI_VPD_HEADER_SIZE] __aligned(4); > int result; > > + /* > + * if this hardware is blacklisted then don't bother asking > + * the page size, since it will repy with zero -- just assume it > + * is the buffer size > + */ > + if (sdev->no_ask_vpd_sz_first) > + return buf_len; > + > /* > * Fetch the VPD page header to find out how big the page > * is. This is done to prevent problems on legacy devices > @@ -367,7 +375,7 @@ int scsi_get_vpd_page(struct scsi_device *sdev, u8 page, unsigned char *buf, > if (!scsi_device_supports_vpd(sdev)) > return -EINVAL; > > - vpd_len = scsi_get_vpd_size(sdev, page); > + vpd_len = scsi_get_vpd_size(sdev, page, buf_len); > if (vpd_len <= 0) > return -EINVAL; > > @@ -402,7 +410,7 @@ static struct scsi_vpd *scsi_get_vpd_buf(struct scsi_device *sdev, u8 page) > struct scsi_vpd *vpd_buf; > int vpd_len, result; > > - vpd_len = scsi_get_vpd_size(sdev, page); > + vpd_len = scsi_get_vpd_size(sdev, page, SCSI_VPD_PG_LEN); > if (vpd_len <= 0) > return NULL; > > diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c > index c7080454aea9..d2b2e841e570 100644 > --- a/drivers/scsi/scsi_devinfo.c > +++ b/drivers/scsi/scsi_devinfo.c > @@ -134,7 +134,7 @@ static struct { > {"3PARdata", "VV", NULL, BLIST_REPORTLUN2}, > {"ADAPTEC", "AACRAID", NULL, BLIST_FORCELUN}, > {"ADAPTEC", "Adaptec 5400S", NULL, BLIST_FORCELUN}, > - {"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES}, > + {"AIX", "VDASD", NULL, BLIST_TRY_VPD_PAGES | BLIST_NO_ASK_VPD_SIZE}, > {"AFT PRO", "-IX CF", "0.0>", BLIST_FORCELUN}, > {"BELKIN", "USB 2 HS-CF", "1.95", BLIST_FORCELUN | BLIST_INQUIRY_36}, > {"BROWNIE", "1200U3P", NULL, BLIST_NOREPORTLUN}, > @@ -188,6 +188,7 @@ static struct { > {"HPE", "OPEN-", "*", BLIST_REPORTLUN2 | BLIST_TRY_VPD_PAGES}, > {"IBM", "AuSaV1S2", NULL, BLIST_FORCELUN}, > {"IBM", "ProFibre 4000R", "*", BLIST_SPARSELUN | BLIST_LARGELUN}, > + {"IBM", "2076", NULL, BLIST_NO_ASK_VPD_SIZE}, > {"IBM", "2105", NULL, BLIST_RETRY_HWERROR}, > {"iomega", "jaz 1GB", "J.86", BLIST_NOTQ | BLIST_NOLUN}, > {"IOMEGA", "ZIP", NULL, BLIST_NOTQ | BLIST_NOLUN}, > diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c > index 5d27f5196de6..b67743e32089 100644 > --- a/drivers/scsi/scsi_scan.c > +++ b/drivers/scsi/scsi_scan.c > @@ -1056,6 +1056,9 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result, > else if (*bflags & BLIST_SKIP_VPD_PAGES) > sdev->skip_vpd_pages = 1; > > + if (*bflags & BLIST_NO_ASK_VPD_SIZE) > + sdev->no_ask_vpd_sz_first = 1; > + > transport_configure_device(&sdev->sdev_gendev); > > if (sdev->host->hostt->slave_configure) { > diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h > index 2493bd65351a..5d15784ccefc 100644 > --- a/include/scsi/scsi_device.h > +++ b/include/scsi/scsi_device.h > @@ -145,6 +145,7 @@ struct scsi_device { > const char * model; /* ... after scan; point to static string */ > const char * rev; /* ... "nullnullnullnull" before scan */ > > +#define SCSI_VPD_PG_LEN 255 /* default SCSI VPD page size (max) */ > struct scsi_vpd __rcu *vpd_pg0; > struct scsi_vpd __rcu *vpd_pg83; > struct scsi_vpd __rcu *vpd_pg80; > @@ -214,6 +215,7 @@ struct scsi_device { > * creation time */ > unsigned ignore_media_change:1; /* Ignore MEDIA CHANGE on resume */ > unsigned silence_suspend:1; /* Do not print runtime PM related messages */ > + unsigned no_ask_vpd_sz_first:1; /* Do not ask for VPD size first */ > > unsigned int queue_stopped; /* request queue is quiesced */ > bool offline_already; /* Device offline message logged */ > diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h > index 5d14adae21c7..ec12dbaff0e8 100644 > --- a/include/scsi/scsi_devinfo.h > +++ b/include/scsi/scsi_devinfo.h > @@ -32,7 +32,8 @@ > #define BLIST_IGN_MEDIA_CHANGE ((__force blist_flags_t)(1ULL << 11)) > /* do not do automatic start on add */ > #define BLIST_NOSTARTONADD ((__force blist_flags_t)(1ULL << 12)) > -#define __BLIST_UNUSED_13 ((__force blist_flags_t)(1ULL << 13)) > +/* do not ask for VPD page size first on some broken targets */ > +#define BLIST_NO_ASK_VPD_SIZE ((__force blist_flags_t)(1ULL << 13)) > #define __BLIST_UNUSED_14 ((__force blist_flags_t)(1ULL << 14)) > #define __BLIST_UNUSED_15 ((__force blist_flags_t)(1ULL << 15)) > #define __BLIST_UNUSED_16 ((__force blist_flags_t)(1ULL << 16)) > @@ -74,8 +75,7 @@ > #define __BLIST_HIGH_UNUSED (~(__BLIST_LAST_USED | \ > (__force blist_flags_t) \ > ((__force __u64)__BLIST_LAST_USED - 1ULL))) > -#define __BLIST_UNUSED_MASK (__BLIST_UNUSED_13 | \ > - __BLIST_UNUSED_14 | \ > +#define __BLIST_UNUSED_MASK (__BLIST_UNUSED_14 | \ > __BLIST_UNUSED_15 | \ > __BLIST_UNUSED_16 | \ > __BLIST_UNUSED_24 | \ To prod people a bit: Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Ivo Totev, Andrew Myers, Andrew McDonald, Martje Boudien Moerman