From patchwork Tue Jul 4 12:56:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 13301193 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 DF46BC00528 for ; Tue, 4 Jul 2023 12:57:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231502AbjGDM5I (ORCPT ); Tue, 4 Jul 2023 08:57:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56126 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231455AbjGDM5H (ORCPT ); Tue, 4 Jul 2023 08:57:07 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6247F10CA; Tue, 4 Jul 2023 05:57:05 -0700 (PDT) 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 EB6722057C; Tue, 4 Jul 2023 12:57:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1688475423; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9aPmJAEDAWDAbogCcIWe3cTfiRzCVb6wX9w2+6QkZJo=; b=wRw6CtHwEV6KgCi4UJsfwzELJnNLLpln2ImrjV2EqRkv4L0q21klE6LlpjtVRgxmaVv5ZQ vNtJzI3Xp1/Ym++j69UaqwJP7ymxYy2n7oC10BJ0GPFKD0T2TdvKx9/WotgHgv4C3N6rYG 8GzRrreGDnZDtR3JF81cOblg7qgXyog= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1688475423; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9aPmJAEDAWDAbogCcIWe3cTfiRzCVb6wX9w2+6QkZJo=; b=gla0ZUkKNuT2lUov6b1A0TRpIx3QngSeIEv2YipUn11ZvpFbt9B191ysqwcsBQxshKrIe9 Uyg9y0hILhkdRgCg== 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 DF198139ED; Tue, 4 Jul 2023 12:57:03 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id oiZ4Nh8XpGRXQwAAMHmgww (envelope-from ); Tue, 04 Jul 2023 12:57:03 +0000 Received: by quack3.suse.cz (Postfix, from userid 1000) id 0524AA0767; Tue, 4 Jul 2023 14:57:03 +0200 (CEST) From: Jan Kara To: Cc: , Christoph Hellwig , Christian Brauner , Jens Axboe , Kees Cook , Ted Tso , syzkaller , Alexander Popov , Eric Biggers , , linux-btrfs@vger.kernel.org, Dmitry Vyukov , Jan Kara Subject: [PATCH 5/6] btrfs: Block writes to seed devices Date: Tue, 4 Jul 2023 14:56:53 +0200 Message-Id: <20230704125702.23180-5-jack@suse.cz> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230704122727.17096-1-jack@suse.cz> References: <20230704122727.17096-1-jack@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=795; i=jack@suse.cz; h=from:subject; bh=O/zE5ZJNriSyJ3rTPMJSXy9rJXYRwNILAjDv6We+cuk=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBkpBcU92ftJ81IhlIupYK00XjPLfBv/vGzXEoF7Mhb T05s0QOJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCZKQXFAAKCRCcnaoHP2RA2VarCA DeKZaEIbHcdCwD/PJ/ccAJnLaidMSFrgfnzsgxRc0O+Kgg/PlCsyChxvzbjboFWDJjVda6fLTjmm2n eO/UYTpZVDXHmtXjMpBjJP8IFcMSFg0z1I37HgjhuDy3GvGMzSegPRA+iSYNN+6AHS0kJWxiekt/SF ILQ6gqVMBM+EcU8CK1pLIki3yNLrZx9GS00EMdxRwlylrWlMLUfGsU9TFHjWCoiB2e65ixejCFgstL egjTkZiyp5IDTxnCSNYL4po6+DhFwGakKMJJSCwReivln8BvlTA2S23PJBfcFlokFjlYVvbnli29cL Tq2kK5apaeo2PCS2ouRImDoQCKdLrt X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org When opening seed devices, ask block layer to not allow other writers to open block device. Signed-off-by: Jan Kara Acked-by: David Sterba --- fs/btrfs/volumes.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index fb7082426498..496e0b6d86ab 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6898,7 +6898,8 @@ static struct btrfs_fs_devices *open_seed_devices(struct btrfs_fs_info *fs_info, if (IS_ERR(fs_devices)) return fs_devices; - ret = open_fs_devices(fs_devices, BLK_OPEN_READ, fs_info->bdev_holder); + ret = open_fs_devices(fs_devices, BLK_OPEN_READ | BLK_OPEN_BLOCK_WRITES, + fs_info->bdev_holder); if (ret) { free_fs_devices(fs_devices); return ERR_PTR(ret);