From nobody Tue Apr 7 21:23:55 2026 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 75C391E7660; Wed, 11 Mar 2026 21:56:27 +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=1773266189; cv=none; b=EXQ4aQWYn0n4Ru5OyRzd/+7apVfEL1NQJ7SN8ou3erbaKy1UcEaSMYx0xYfSoNZ7AmY2HVxWHNa64F+KzWA+nIhd3XWPBTGS9IaoAEKqD5dLQ75qFu6J7BnDQUmoCsIH4KL8xrTpK+vrEy/6kDgRkx3v2ZZEtp/nhj8Tpi3zu48= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773266189; c=relaxed/simple; bh=jsmYqEfin/W6QXrJh5f/89X3/kJ/bACDGoIAjq0LjVg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=X7b8Xi7K4WOBc013iqobARK17gOqXH2MYZzeFxv89M8rXoLYauxLZEdrAMgx57lVz/XNeT4MPmGleVy89FF57SH0n250ZiyLmlcQbor1X5G+VKRO1qXtAvX+wI35q3vOewIAJLyeaAdeXblCidx6URVzkBs8Ngjf6Qt0iwoqxR8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EJiGUF3S; 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="EJiGUF3S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 265F3C4CEF7; Wed, 11 Mar 2026 21:56:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773266187; bh=jsmYqEfin/W6QXrJh5f/89X3/kJ/bACDGoIAjq0LjVg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=EJiGUF3SEHU4DAbeLJypwaCzpwL8keAHscr6VgIJrRQmk6QBXBA950wk45PCagNNh hgYFvKrKNhcwKMpE4r8XBkVhB+FHiFMYabw3fmceN04OBC9wHRx4q2bSa2YZ4UUhQF 2IdZctwNME6439wSjTmkp+b5RnBeeJU6mPQcMPIbLP3zilXlmA/MhXEsJtfmFS1EtH dvsYiUe2d86US+0hnSTWsZ2Nb+TDy0DrC4YYcmyQT6fMjpI0NwwK7Azp3Ir6I9/xL1 xMSZnqXy3urPua3UKbYDPue8kZoSJb80P4TY62G15WpJ2vP/69gweu5VJVhk3Nh6vJ 7ojonbWBEkm9A== From: Christian Brauner Date: Wed, 11 Mar 2026 22:43:49 +0100 Subject: [PATCH RFC v3 06/26] rnbd: use scoped_with_init_fs() for block device open Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260311-work-kthread-nullfs-v3-6-3dd2cbe92ad0@kernel.org> References: <20260311-work-kthread-nullfs-v3-0-3dd2cbe92ad0@kernel.org> In-Reply-To: <20260311-work-kthread-nullfs-v3-0-3dd2cbe92ad0@kernel.org> To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , linux-kernel@vger.kernel.org, Alexander Viro , Jens Axboe , Jan Kara , Tejun Heo , Jann Horn , Christian Brauner X-Mailer: b4 0.15-dev-9fd7c X-Developer-Signature: v=1; a=openpgp-sha256; l=1270; i=brauner@kernel.org; h=from:subject:message-id; bh=jsmYqEfin/W6QXrJh5f/89X3/kJ/bACDGoIAjq0LjVg=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWRufPJD46zwgeP1CY5Gd0828T/I3MFqsGbBZ9fJIeZsG wQ+99zm6ihlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZjI7ruMDH3vnY52/tldf3PK vg39p7UDHKV0Pq7qyVj5V92yK9dU6SLD/4Ad5zSWWRj8rW1iiuUvfu8l91SM7UTz5DkJe6ucjjh EMAIA X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Use scoped_with_init_fs() to temporarily override current->fs for the bdev_file_open_by_path() call so the path lookup happens in init's filesystem context. process_msg_open() =E2=86=90 rnbd_srv_rdma_ev() =E2=86=90 RDMA completion c= allback =E2=86=90 ib_cq_poll_work() =E2=86=90 kworker (InfiniBand completion workqueue) Signed-off-by: Christian Brauner --- drivers/block/rnbd/rnbd-srv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c index 10e8c438bb43..79c9a5fb418f 100644 --- a/drivers/block/rnbd/rnbd-srv.c +++ b/drivers/block/rnbd/rnbd-srv.c @@ -11,6 +11,7 @@ =20 #include #include +#include =20 #include "rnbd-srv.h" #include "rnbd-srv-trace.h" @@ -734,7 +735,8 @@ static int process_msg_open(struct rnbd_srv_session *sr= v_sess, goto reject; } =20 - bdev_file =3D bdev_file_open_by_path(full_path, open_flags, NULL, NULL); + scoped_with_init_fs() + bdev_file =3D bdev_file_open_by_path(full_path, open_flags, NULL, NULL); if (IS_ERR(bdev_file)) { ret =3D PTR_ERR(bdev_file); pr_err("Opening device '%s' on session %s failed, failed to open the blo= ck device, err: %pe\n", --=20 2.47.3