From patchwork Fri May 22 15:38:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 11565879 X-Patchwork-Delegate: snitzer@redhat.com 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 93F691392 for ; Fri, 22 May 2020 15:40:10 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 51EBA20823 for ; Fri, 22 May 2020 15:40:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Cw36JO5K" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 51EBA20823 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dm-devel-bounces@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1590162009; 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=IeNDmZH05kg43DdJkxkavmazUS4n9838KfpKRvBLK2U=; b=Cw36JO5KYeRQqVsBZLzn1lMGyQPntxKta2WBnWtktK23VOeghq8TMFLNamt4f9VTbaSm4m odL8g1gOe2d6Po2PRERIVfVfib+DEJuhBylt/dHup0/7lp4jHGbePJYSXs2uKSpnhxkVC7 9d24N5jmksvdWZgCCb/NXwe2ecqtASg= 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-304-cgdLxFmjMHiNnDL-SSqnQw-1; Fri, 22 May 2020 11:40:02 -0400 X-MC-Unique: cgdLxFmjMHiNnDL-SSqnQw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id ED75CDFDEC; Fri, 22 May 2020 15:39:41 +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 BC76C78B3B; Fri, 22 May 2020 15:39:41 +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 9861254D0A; Fri, 22 May 2020 15:39:41 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 04MFdIFV012620 for ; Fri, 22 May 2020 11:39:18 -0400 Received: by smtp.corp.redhat.com (Postfix) id A8F112156A3B; Fri, 22 May 2020 15:39:18 +0000 (UTC) Delivered-To: dm-devel@redhat.com Received: from mimecast-mx02.redhat.com (mimecast01.extmail.prod.ext.rdu2.redhat.com [10.11.55.17]) by smtp.corp.redhat.com (Postfix) with ESMTPS id A4A572166B27 for ; Fri, 22 May 2020 15:39:16 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-2.mimecast.com [205.139.110.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id DDB9A8ECB57 for ; Fri, 22 May 2020 15:39:15 +0000 (UTC) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-22-Q_Hq1fQhPYulB_jigrmLww-1; Fri, 22 May 2020 11:39:11 -0400 X-MC-Unique: Q_Hq1fQhPYulB_jigrmLww-1 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 75389B20E; Fri, 22 May 2020 15:39:12 +0000 (UTC) From: Hannes Reinecke To: Damien LeMoal Date: Fri, 22 May 2020 17:38:52 +0200 Message-Id: <20200522153901.133375-4-hare@suse.de> In-Reply-To: <20200522153901.133375-1-hare@suse.de> References: <20200522153901.133375-1-hare@suse.de> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-loop: dm-devel@redhat.com Cc: dm-devel@redhat.com, Mike Snitzer Subject: [dm-devel] [PATCH 03/12] dm-zoned: use on-stack superblock for tertiary 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 10.5.11.11 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Checking the teriary superblock just consists of validating UUIDs, crcs, and the generation number; it doesn't have contents which would be required during the actual operation. So we should use an on-stack superblock and avoid having to store it together with the 'real' superblocks. Signed-off-by: Hannes Reinecke --- drivers/md/dm-zoned-metadata.c | 98 +++++++++++++++++++++++------------------- 1 file changed, 53 insertions(+), 45 deletions(-) diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c index 3da6702bb1ae..b70a988fa771 100644 --- a/drivers/md/dm-zoned-metadata.c +++ b/drivers/md/dm-zoned-metadata.c @@ -174,7 +174,7 @@ struct dmz_metadata { /* Zone information array */ struct xarray zones; - struct dmz_sb sb[3]; + struct dmz_sb sb[2]; unsigned int mblk_primary; unsigned int sb_version; u64 sb_gen; @@ -995,10 +995,11 @@ int dmz_flush_metadata(struct dmz_metadata *zmd) /* * Check super block. */ -static int dmz_check_sb(struct dmz_metadata *zmd, unsigned int set) +static int dmz_check_sb(struct dmz_metadata *zmd, struct dmz_sb *dsb, + bool tertiary) { - struct dmz_super *sb = zmd->sb[set].sb; - struct dmz_dev *dev = zmd->sb[set].dev; + struct dmz_super *sb = dsb->sb; + struct dmz_dev *dev = dsb->dev; unsigned int nr_meta_zones, nr_data_zones; u32 crc, stored_crc; u64 gen; @@ -1015,7 +1016,7 @@ static int dmz_check_sb(struct dmz_metadata *zmd, unsigned int set) DMZ_META_VER, zmd->sb_version); return -EINVAL; } - if ((zmd->sb_version < 1) && (set == 2)) { + if ((zmd->sb_version < 1) && tertiary) { dmz_dev_err(dev, "Tertiary superblocks are not supported"); return -EINVAL; } @@ -1059,7 +1060,7 @@ static int dmz_check_sb(struct dmz_metadata *zmd, unsigned int set) return -ENXIO; } - if (set == 2) { + if (tertiary) { /* * Generation number should be 0, but it doesn't * really matter if it isn't. @@ -1108,13 +1109,13 @@ static int dmz_check_sb(struct dmz_metadata *zmd, unsigned int set) /* * Read the first or second super block from disk. */ -static int dmz_read_sb(struct dmz_metadata *zmd, unsigned int set) +static int dmz_read_sb(struct dmz_metadata *zmd, struct dmz_sb *sb, int set) { DMDEBUG("(%s): read superblock set %d dev %s block %llu", zmd->devname, set, zmd->sb[set].dev->name, zmd->sb[set].block); - return dmz_rdwr_block(zmd->sb[set].dev, REQ_OP_READ, - zmd->sb[set].block, zmd->sb[set].mblk->page); + return dmz_rdwr_block(sb->dev, REQ_OP_READ, + sb->block, sb->mblk->page); } /* @@ -1142,7 +1143,7 @@ static int dmz_lookup_secondary_sb(struct dmz_metadata *zmd) zmd->sb[1].zone = xa_load(&zmd->zones, zone_id + 1); zmd->sb[1].dev = dmz_zone_to_dev(zmd, zmd->sb[1].zone); for (i = 1; i < zmd->nr_rnd_zones; i++) { - if (dmz_read_sb(zmd, 1) != 0) + if (dmz_read_sb(zmd, &zmd->sb[1], 1) != 0) break; if (le32_to_cpu(zmd->sb[1].sb->magic) == DMZ_MAGIC) return 0; @@ -1160,9 +1161,9 @@ static int dmz_lookup_secondary_sb(struct dmz_metadata *zmd) } /* - * Read the first or second super block from disk. + * Read a super block from disk. */ -static int dmz_get_sb(struct dmz_metadata *zmd, unsigned int set) +static int dmz_get_sb(struct dmz_metadata *zmd, struct dmz_sb *sb, int set) { struct dmz_mblock *mblk; int ret; @@ -1172,14 +1173,14 @@ static int dmz_get_sb(struct dmz_metadata *zmd, unsigned int set) if (!mblk) return -ENOMEM; - zmd->sb[set].mblk = mblk; - zmd->sb[set].sb = mblk->data; + sb->mblk = mblk; + sb->sb = mblk->data; /* Read super block */ - ret = dmz_read_sb(zmd, set); + ret = dmz_read_sb(zmd, sb, set); if (ret) { dmz_free_mblock(zmd, mblk); - zmd->sb[set].mblk = NULL; + sb->mblk = NULL; return ret; } @@ -1253,13 +1254,13 @@ static int dmz_load_sb(struct dmz_metadata *zmd) /* Read and check the primary super block */ zmd->sb[0].block = dmz_start_block(zmd, zmd->sb[0].zone); zmd->sb[0].dev = dmz_zone_to_dev(zmd, zmd->sb[0].zone); - ret = dmz_get_sb(zmd, 0); + ret = dmz_get_sb(zmd, &zmd->sb[0], 0); if (ret) { dmz_dev_err(zmd->sb[0].dev, "Read primary super block failed"); return ret; } - ret = dmz_check_sb(zmd, 0); + ret = dmz_check_sb(zmd, &zmd->sb[0], false); /* Read and check secondary super block */ if (ret == 0) { @@ -1272,7 +1273,7 @@ static int dmz_load_sb(struct dmz_metadata *zmd) } zmd->sb[1].block = dmz_start_block(zmd, zmd->sb[1].zone); zmd->sb[1].dev = dmz_zone_to_dev(zmd, zmd->sb[1].zone); - ret = dmz_get_sb(zmd, 1); + ret = dmz_get_sb(zmd, &zmd->sb[1], 1); } else ret = dmz_lookup_secondary_sb(zmd); @@ -1281,7 +1282,7 @@ static int dmz_load_sb(struct dmz_metadata *zmd) return ret; } - ret = dmz_check_sb(zmd, 1); + ret = dmz_check_sb(zmd, &zmd->sb[1], false); if (ret == 0) sb_good[1] = true; @@ -1326,18 +1327,32 @@ static int dmz_load_sb(struct dmz_metadata *zmd) "Using super block %u (gen %llu)", zmd->mblk_primary, zmd->sb_gen); - if ((zmd->sb_version > 1) && zmd->sb[2].zone) { - zmd->sb[2].block = dmz_start_block(zmd, zmd->sb[2].zone); - zmd->sb[2].dev = dmz_zone_to_dev(zmd, zmd->sb[2].zone); - ret = dmz_get_sb(zmd, 2); - if (ret) { - dmz_dev_err(zmd->sb[2].dev, - "Read tertiary super block failed"); - return ret; + if (zmd->sb_version > 1) { + int i; + + for (i = 1; i < zmd->nr_devs; i++) { + struct dmz_sb sb; + + sb.block = 0; + sb.zone = dmz_get(zmd, zmd->dev[i].zone_offset); + sb.dev = &zmd->dev[i]; + if (!dmz_is_meta(sb.zone)) { + dmz_dev_err(sb.dev, + "Tertiary super block zone %u not marked as metadata zone", + sb.zone->id); + return -EINVAL; + } + ret = dmz_get_sb(zmd, &sb, i + 1); + if (ret) { + dmz_dev_err(sb.dev, + "Read tertiary super block failed"); + return ret; + } + ret = dmz_check_sb(zmd, &sb, true); + dmz_free_mblock(zmd, sb.mblk); + if (ret == -EINVAL) + return ret; } - ret = dmz_check_sb(zmd, 2); - if (ret == -EINVAL) - return ret; } return 0; } @@ -1402,12 +1417,15 @@ static int dmz_init_zone(struct blk_zone *blkz, unsigned int num, void *data) zmd->sb[0].zone = zone; } } - if (zmd->nr_devs > 1 && !zmd->sb[2].zone) { - /* Tertiary superblock zone */ - zmd->sb[2].zone = zone; + if (zmd->nr_devs > 1 && num == 0) { + /* + * Tertiary superblock zones are always at the + * start of the zoned devices, so mark them + * as metadata zone. + */ + set_bit(DMZ_META, &zone->flags); } } - return 0; } @@ -2850,16 +2868,6 @@ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev, } set_bit(DMZ_META, &zone->flags); } - if (zmd->sb[2].zone) { - zone = dmz_get(zmd, zmd->sb[2].zone->id); - if (!zone) { - dmz_zmd_err(zmd, - "Tertiary metadata zone not present"); - ret = -ENXIO; - goto err; - } - set_bit(DMZ_META, &zone->flags); - } /* Load mapping table */ ret = dmz_load_mapping(zmd); if (ret)