From nobody Thu Apr 9 21:49:53 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 CB85535E92F; Thu, 5 Mar 2026 23:30:28 +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=1772753428; cv=none; b=Th7Cs7Muvfe5kWBY6/Sc0zt/cnf2iYgExz6PyrPz/MFbLGt5ZczmnkQr6wYhWStv9J/uUqq/Ha72hXlxyVMtTrLw7hcBvfpsodKFGXO7e87FS6W1szQE2ZPeDa+JA3umOLPOH3JpyqM+uFQ6GLalJNON+HsNcN+BeMo6eGKiIhE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772753428; 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=BQc2AyOiA9EYjPv7nE5tHHRgCnKvVT7VBl8A9WS5aBjEYpVPBpvV/Tt95g2hEAXzhcMwEBcrz4ARfpZSaxaIqfBiHo78+s7rLjbhEN68hODNnrs2yJ7vMkdTjZ5ltz2j0ucZF3GRkwWaV1czcx1c6DDzfRFRwZF8fU0y8rf1ioY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NTQAPQCw; 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="NTQAPQCw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A3A1C116C6; Thu, 5 Mar 2026 23:30:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772753428; bh=jsmYqEfin/W6QXrJh5f/89X3/kJ/bACDGoIAjq0LjVg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=NTQAPQCwE7GWorbCtaq2XPX40KiiqXAO5phQMZne8DPF0ceqeg1R5PhDHPOyb/wfN 7djs+ZUVjODLfRGTcUQnhke+bVrl+293ECA1DNc6p75EzcGBqYgdsu4+bwy1KaXVMn kPTBoSsVqRApQPIj7Qsz8LEWkl7eCFXLJwPchbTpsRV8WQ5+K6/DVtuUKTuEHFf75L aS7qXRg8uw66+MHODZ7Zl5S2lJLeUWqCX67eDkSMyRR8I4kl0M9ogtBBoZWbjzY+YS QvsnjvW59yNNhkI/6NXi6sGiwQ/4YbKSvqHRiOX8K1Kn/xHT5aog0XJglQmOGjfN3M X8er0b+CmSIsw== From: Christian Brauner Date: Fri, 06 Mar 2026 00:30:06 +0100 Subject: [PATCH RFC v2 03/23] 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: <20260306-work-kthread-nullfs-v2-3-ad1b4bed7d3e@kernel.org> References: <20260306-work-kthread-nullfs-v2-0-ad1b4bed7d3e@kernel.org> In-Reply-To: <20260306-work-kthread-nullfs-v2-0-ad1b4bed7d3e@kernel.org> To: linux-fsdevel@vger.kernel.org, Linus Torvalds Cc: linux-kernel@vger.kernel.org, Alexander Viro , Jens Axboe , Jan Kara , Tejun Heo , Jann Horn , Christian Brauner X-Mailer: b4 0.15-dev-47773 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=owGbwMvMwCU28Zj0gdSKO4sYT6slMWSuEuIMVTipc2tu4JWcZHH5/fPO3ZuxKtjj8o4a1bpvz Mduqeu97ShlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZgIrx0jw2G10l1+atyy6ZM/ n4nsaXIN2JpR2Hzur4eX+1PNxY2Tixn+qQkVcmsslP0j4uPP8n3Oho0Ncd1bj3hlfJurWPggct9 nTgA= 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