From patchwork Sat Jan 9 10:42:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 359771 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D69EDC433DB for ; Sat, 9 Jan 2021 10:47:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A462123A1E for ; Sat, 9 Jan 2021 10:47:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726817AbhAIKrW (ORCPT ); Sat, 9 Jan 2021 05:47:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725956AbhAIKrV (ORCPT ); Sat, 9 Jan 2021 05:47:21 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 395FDC061786; Sat, 9 Jan 2021 02:46:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=tm46/p8xGvJZrA4UFHRSRl5YybeqFScWDNcbf2u9WV4=; b=R8EsSubjYzfHWHOhcdFz8vIWtg s3ZErXQrg2WYLXyM/qkf31uicxMafacZNC4iJtvH8Z5VlB/0AyXTANnXVE35/Hjs1SkXIe2cOYF2c FfSxggotM9it9zEejl4i/elmHPVrj+0J9fruBDnwzTgR7iizE/g+r9dn2tPWiqtyDtL4uDVjcF6eS TtWPLTRHot6isJFtb8affiE8cHw2oiXPENfZxAdFhoG/mN5rmf5q3MQV2QbzR9TOiuoRhdNwux9cH WzFJ0V5d8gyhmz2fdODSCcpqqbU2hB+x/h2hUDmTrF6uM/kv4RmJztmeDBA5mzDmUdlAA9TGTZsJR qhOAFXLg==; Received: from [2001:4bb8:19b:e528:4197:a20:99de:e7b0] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1kyBjS-000T18-2X; Sat, 09 Jan 2021 10:44:50 +0000 From: Christoph Hellwig To: Jens Axboe Cc: "Martin K . Petersen" , Oleksii Kurochko , Sagi Grimberg , Mike Snitzer , Ilya Dryomov , Dongsheng Yang , ceph-devel@vger.kernel.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, Ming Lei Subject: [PATCH 2/6] block: remove the NULL bdev check in bdev_read_only Date: Sat, 9 Jan 2021 11:42:50 +0100 Message-Id: <20210109104254.1077093-3-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210109104254.1077093-1-hch@lst.de> References: <20210109104254.1077093-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Only a single caller can end up in bdev_read_only, so move the check there. Signed-off-by: Christoph Hellwig Reviewed-by: Ming Lei Reviewed-by: Martin K. Petersen Reviewed-by: Hannes Reinecke --- block/genhd.c | 3 --- fs/super.c | 3 ++- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index 73faec438e49a8..4f90f80d7aa76d 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1654,11 +1654,8 @@ EXPORT_SYMBOL(set_disk_ro); int bdev_read_only(struct block_device *bdev) { - if (!bdev) - return 0; return bdev->bd_read_only; } - EXPORT_SYMBOL(bdev_read_only); /* diff --git a/fs/super.c b/fs/super.c index 2c6cdea2ab2d9e..5a1f384ffc74f6 100644 --- a/fs/super.c +++ b/fs/super.c @@ -865,7 +865,8 @@ int reconfigure_super(struct fs_context *fc) if (fc->sb_flags_mask & SB_RDONLY) { #ifdef CONFIG_BLOCK - if (!(fc->sb_flags & SB_RDONLY) && bdev_read_only(sb->s_bdev)) + if (!(fc->sb_flags & SB_RDONLY) && sb->s_bdev && + bdev_read_only(sb->s_bdev)) return -EACCES; #endif From patchwork Sat Jan 9 10:42:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 359770 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 50F48C433E6 for ; Sat, 9 Jan 2021 10:48:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1D75323A1E for ; Sat, 9 Jan 2021 10:48:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726852AbhAIKsk (ORCPT ); Sat, 9 Jan 2021 05:48:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54664 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725956AbhAIKsk (ORCPT ); Sat, 9 Jan 2021 05:48:40 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90A5BC0617A3; Sat, 9 Jan 2021 02:47:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=OuO8kXBwOVg2a0qlGOHd+KBfCRFHK5StyY10tKFHVS8=; b=VeZFfshSf9Ix0EcE41evKramMP jn5vZju+vCViJE/nGVWD9jxUQ4zuFVyTiarcua3S0nKzo7UtPQ3qIvoDASsUtzBegY+tOdk/8xOJU SYiCsPCW7JhSvmDRJr6Lorz+5qbHCPXUzOT+g++UB3pV/FLKrxmLDRt7hyQoDNuep1RFkMyXYIeP3 NbSdIibjh9ZG/rL8H6VX4+ebq8g12ZsuZ8yV1igsjWwJ+tzmCwWzJWONL0ss00jAta8hq2Gpvoi6u KxUiqhoHwmWMvQ0hEVuPfAn7NQKRcax/09Nx9Mv0b82q3hBiycqDf9GEL376cuzLHC4Vov+fP779e nSUoU8fw==; Received: from [2001:4bb8:19b:e528:4197:a20:99de:e7b0] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1kyBl7-000TC6-Dn; Sat, 09 Jan 2021 10:46:20 +0000 From: Christoph Hellwig To: Jens Axboe Cc: "Martin K . Petersen" , Oleksii Kurochko , Sagi Grimberg , Mike Snitzer , Ilya Dryomov , Dongsheng Yang , ceph-devel@vger.kernel.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org Subject: [PATCH 4/6] block: propagate BLKROSET on the whole device to all partitions Date: Sat, 9 Jan 2021 11:42:52 +0100 Message-Id: <20210109104254.1077093-5-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210109104254.1077093-1-hch@lst.de> References: <20210109104254.1077093-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Change the policy so that a BLKROSET on the whole device also affects partitions. To quote Martin K. Petersen: It's very common for database folks to twiddle the read-only state of block devices and partitions. I know that our users will find it very counter-intuitive that setting /dev/sda read-only won't prevent writes to /dev/sda1. The existing behavior is inconsistent in the sense that doing: # blockdev --setro /dev/sda # echo foo > /dev/sda1 permits writes. But: # blockdev --setro /dev/sda # echo foo > /dev/sda1 doesn't. And a subsequent: # blockdev --setrw /dev/sda # echo foo > /dev/sda1 doesn't work either since sda1's read-only policy has been inherited from the whole-disk device. You need to do: # blockdev --rereadpt after setting the whole-disk device rw to effectuate the same change on the partitions, otherwise they are stuck being read-only indefinitely. However, setting the read-only policy on a partition does *not* require the revalidate step. As a matter of fact, doing the revalidate will blow away the policy setting you just made. So the user needs to take different actions depending on whether they are trying to read-protect a whole-disk device or a partition. Despite using the same ioctl. That is really confusing. I have lost count how many times our customers have had data clobbered because of ambiguity of the existing whole-disk device policy. The current behavior violates the principle of least surprise by letting the user think they write protected the whole disk when they actually didn't. Suggested-by: Martin K. Petersen Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Reviewed-by: Hannes Reinecke --- block/genhd.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index e70bdc9b0893c1..10c76320510fef 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1658,8 +1658,7 @@ EXPORT_SYMBOL(set_disk_ro); int bdev_read_only(struct block_device *bdev) { - return bdev->bd_read_only || - test_bit(GD_READ_ONLY, &bdev->bd_disk->state); + return bdev->bd_read_only || get_disk_ro(bdev->bd_disk); } EXPORT_SYMBOL(bdev_read_only); From patchwork Sat Jan 9 10:42:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 359769 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 46D29C433E6 for ; Sat, 9 Jan 2021 10:49:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 12E8723A23 for ; Sat, 9 Jan 2021 10:49:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726943AbhAIKtO (ORCPT ); Sat, 9 Jan 2021 05:49:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726062AbhAIKtO (ORCPT ); Sat, 9 Jan 2021 05:49:14 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7A8AC06179F; Sat, 9 Jan 2021 02:48:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=mDWnaDevg6j/LIqbxuNXDRQmS3LZ4FlK87nsZVHjQJ8=; b=KWvb1OYXxrnn4YYTtLmVo+sUvh /iI0OvkVFhTqLsH8n1T/r3RrxIhV/gOys37miH7wINjKVf9TAraHciY9ocqwizsyzQ/j4ESDKuQAC SwP9SVrXmj/yVzAxE5vJCfRTVqD2SDUlzvWwzTdQ4YqBgwUgDoMgxquxUnd27AKZP5shJrqbATSHz CBFv3TyeQyfWkFKDuubInO3wX1DKHCU/+jtsfauFpqEJacD+JPtCVGKwJaviI2UJnYFN3ku4dPdDy /xD7zzRDTGjxaAIYZ1QV8XhjRd7EYCRFFw7Iey938axTcUB7AEbzTtGfVRSdSY9HvIljiEFiORcfd FzOH+8bA==; Received: from [2001:4bb8:19b:e528:4197:a20:99de:e7b0] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1kyBmY-000TMB-Aq; Sat, 09 Jan 2021 10:47:49 +0000 From: Christoph Hellwig To: Jens Axboe Cc: "Martin K . Petersen" , Oleksii Kurochko , Sagi Grimberg , Mike Snitzer , Ilya Dryomov , Dongsheng Yang , ceph-devel@vger.kernel.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, Keith Busch Subject: [PATCH 6/6] nvme: allow revalidate to set a namespace read-only Date: Sat, 9 Jan 2021 11:42:54 +0100 Message-Id: <20210109104254.1077093-7-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210109104254.1077093-1-hch@lst.de> References: <20210109104254.1077093-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Unconditionally call set_disk_ro now that it only updates the hardware state. This allows to properly set up the Linux devices read-only when the controller turns a previously writable namespace read-only. Signed-off-by: Christoph Hellwig Reviewed-by: Keith Busch Reviewed-by: Martin K. Petersen Reviewed-by: Chaitanya Kulkarni Reviewed-by: Hannes Reinecke --- drivers/nvme/host/core.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index ce1b6151944131..3a0557ccc9fc5d 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2114,9 +2114,8 @@ static void nvme_update_disk_info(struct gendisk *disk, nvme_config_discard(disk, ns); nvme_config_write_zeroes(disk, ns); - if ((id->nsattr & NVME_NS_ATTR_RO) || - test_bit(NVME_NS_FORCE_RO, &ns->flags)) - set_disk_ro(disk, true); + set_disk_ro(disk, (id->nsattr & NVME_NS_ATTR_RO) || + test_bit(NVME_NS_FORCE_RO, &ns->flags)); } static inline bool nvme_first_scan(struct gendisk *disk)