From nobody Wed Oct 15 22:50:09 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 65D6D2745F5; Sun, 24 Mar 2024 23:35:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711323341; cv=none; b=iW8085G+lhepst0L2+uer9ObLAy+OAjH0sbFiXuWqypAQkPeXDt13Be0wt89th4EdRRIUPrTB4L6dO5aUO10HtQqcyCFa0ihKNDAXqKRijd7+Yqki9tckasZAjFMMLpcXQJvip5/Q9Dss8/EWwzSxsLJw1mPtrjSzRhb8ugYDSA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711323341; c=relaxed/simple; bh=VKz/S+EARHQkPHWZCbtg1WoF8qFHQoAanzE/UknEQCQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fMd/g/xP2Ly0DRUBM6hxVX9ufTnlHkCmCKQDqIq5sxYu1AAE6JL5HEUfJrlNJGW7EINLQ/Sk86DudSo7EJ/bRTFS4MbEJWnktkUuyA7o8DqEm91sy/lx2psmWHHS454N8Ymk7nR9RcMa0zUm9FsJwqvYnYk7FIBO4Tv5OMb5T/Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iXMahLPX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iXMahLPX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87277C43399; Sun, 24 Mar 2024 23:35:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711323341; bh=VKz/S+EARHQkPHWZCbtg1WoF8qFHQoAanzE/UknEQCQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iXMahLPXUuLXXk9sUBETqjRifE1L5uORE6TjkGvAdzgwu2PP6cvyUYRFG0x60zU1o 8g4ZwF1Y1d/eyanNihoP/dR2Di7UCaCTqVZ4WqwVB8/TW9FBfYjhgI/eGWko4cogAT pwDbITKJuAm9GLCvwEnNJBG76DHl0E2lPncSbMHGA9bFMLMqC/cX8R0DMXIjUoxlvD VP030y4G8oHPdb1K6EjYO4KYxWdn4C7LoxmUHvezMpG/8AAzWXdTx8ww73mnpLPR1q kSxzvfrbV1XBqKnnnBA2xfSauhEGlwG4RlnLD7qfwRNn4iKQ5Fn5vSs6Y4ple3WtMM 9pJVYpKN+PaBQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Li Nan , Yu Kuai , Song Liu , Sasha Levin Subject: [PATCH 5.15 041/317] md: Don't clear MD_CLOSING when the raid is about to stop Date: Sun, 24 Mar 2024 19:30:21 -0400 Message-ID: <20240324233458.1352854-42-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324233458.1352854-1-sashal@kernel.org> References: <20240324233458.1352854-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Li Nan [ Upstream commit 9674f54e41fffaf06f6a60202e1fa4cc13de3cf5 ] The raid should not be opened anymore when it is about to be stopped. However, other processes can open it again if the flag MD_CLOSING is cleared before exiting. From now on, this flag will not be cleared when the raid will be stopped. Fixes: 065e519e71b2 ("md: MD_CLOSING needs to be cleared after called md_se= t_readonly or do_md_stop") Signed-off-by: Li Nan Reviewed-by: Yu Kuai Signed-off-by: Song Liu Link: https://lore.kernel.org/r/20240226031444.3606764-6-linan666@huaweiclo= ud.com Signed-off-by: Sasha Levin --- drivers/md/md.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index a17f2f725822a..c937ad7f6b73a 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -6230,7 +6230,15 @@ static void md_clean(struct mddev *mddev) mddev->persistent =3D 0; mddev->level =3D LEVEL_NONE; mddev->clevel[0] =3D 0; - mddev->flags =3D 0; + /* + * Don't clear MD_CLOSING, or mddev can be opened again. + * 'hold_active !=3D 0' means mddev is still in the creation + * process and will be used later. + */ + if (mddev->hold_active) + mddev->flags =3D 0; + else + mddev->flags &=3D BIT_ULL_MASK(MD_CLOSING); mddev->sb_flags =3D 0; mddev->ro =3D MD_RDWR; mddev->metadata_type[0] =3D 0; @@ -7550,7 +7558,6 @@ static int md_ioctl(struct block_device *bdev, fmode_= t mode, int err =3D 0; void __user *argp =3D (void __user *)arg; struct mddev *mddev =3D NULL; - bool did_set_md_closing =3D false; =20 if (!md_ioctl_valid(cmd)) return -ENOTTY; @@ -7637,7 +7644,6 @@ static int md_ioctl(struct block_device *bdev, fmode_= t mode, err =3D -EBUSY; goto out; } - did_set_md_closing =3D true; mutex_unlock(&mddev->open_mutex); sync_blockdev(bdev); } @@ -7800,7 +7806,7 @@ static int md_ioctl(struct block_device *bdev, fmode_= t mode, mddev->hold_active =3D 0; mddev_unlock(mddev); out: - if(did_set_md_closing) + if (cmd =3D=3D STOP_ARRAY_RO || (err && cmd =3D=3D STOP_ARRAY)) clear_bit(MD_CLOSING, &mddev->flags); return err; } --=20 2.43.0