From mboxrd@z Thu Jan 1 00:00:00 1970 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 87F9E800 for ; Tue, 24 Mar 2026 00:04:36 +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=1774310676; cv=none; b=HSAU85KGOtQvz5B9GoF2zmZFL0fJigcMShFCzTB+3TuMKero4Pl0HJ7eCX3sRwME6H6tkjF+4qHrmuv/tmL5OKtiYdTkTWVcOY014d76OfnXtimJUtGlwOitRC47qBayDRaNtoOLD0zAJB0RVN4ekwnN/U9PTMcQoSZ0tGTsgkU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774310676; c=relaxed/simple; bh=RjVOR47qp24IAKEEe0ulRlNxqwb5qlwoFpI9Bby45rQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=czYdKYp+OWnead9F+o63ybu4Peyno+4JES8W/6Xm16fss+1/i5gKXiaCtyvHL4hTN7Q/5LfHWJwWqyCOm/nyQbp7gBEQY8XqTB/IEXXiBrvdlWhab6XrKlqySeitDFzwMQfA/1YhTINQ6nOUrYR0B9Dj2VfoJmJDvtcJFxlfk64= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cd1Kgcu7; 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="cd1Kgcu7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2BE73C4CEF7; Tue, 24 Mar 2026 00:04:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774310676; bh=RjVOR47qp24IAKEEe0ulRlNxqwb5qlwoFpI9Bby45rQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=cd1Kgcu7xA+BOlyd2ZurQi17eGiEe827ZSRv2CUGHCsSMevA1r8VK9y8d7S4Ogcmn GtfjFweZgEHVaovJm3Q3ROS/k+Itn4i+rets1eibX1Kt+VhFqIFg+Jl70mEjb5oZSG Ng1V3ambxEGT5k7H0YeDSstkDeHUL4VVlg8e4KpnM+405/IOdrH8aHY5WkmBgLP56A 4Ckfa5IxM3XcKgRqTt/AYqMKFKaQ9z2yfGCCKLhR5Pi64TsgkRdUHtrV9bbrXqW13X HA4B43neXNtKONvbPQp4lKMtP356HUrcVBmgWxaCcVG4/W9Z/ZrSJQ1JK/w7M39TE1 Fn6rakao9gadw== Date: Mon, 23 Mar 2026 17:04:35 -0700 From: "Darrick J. Wong" To: Bernd Schubert Cc: linux-fsdevel@vger.kernel.org, Miklos Szeredi , Joanne Koong , Bernd Schubert Subject: Re: [PATCH 13/19] Add fuse_session_set_debug() to enable debug output without foreground Message-ID: <20260324000435.GN6202@frogsfrogsfrogs> References: <20260323-fuse-init-before-mount-v1-0-a52d3040af69@bsbernd.com> <20260323-fuse-init-before-mount-v1-13-a52d3040af69@bsbernd.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260323-fuse-init-before-mount-v1-13-a52d3040af69@bsbernd.com> On Mon, Mar 23, 2026 at 06:45:08PM +0100, Bernd Schubert wrote: > From: Bernd Schubert > > One might want to print debug out in background mode, which the command > line parameter does not easily allow. Or one might want to enable and > disable at run time. > > Signed-off-by: Bernd Schubert Woot! Have been wanting this for fuse4fs for a while :) Reviewed-by: "Darrick J. Wong" --D > --- > include/fuse_lowlevel.h | 12 ++++++++++++ > lib/fuse_lowlevel.c | 5 +++++ > lib/fuse_versionscript | 1 + > 3 files changed, 18 insertions(+) > > diff --git a/include/fuse_lowlevel.h b/include/fuse_lowlevel.h > index d8626f85bdaf497534cd2835a589e30f1f4e2466..d85929e291a77de8caad7d6b3d9ac5b092ce0e62 100644 > --- a/include/fuse_lowlevel.h > +++ b/include/fuse_lowlevel.h > @@ -2441,6 +2441,18 @@ int fuse_session_receive_buf(struct fuse_session *se, struct fuse_buf *buf); > */ > void fuse_session_want_sync_init(struct fuse_session *se); > > +/** > + * Enable debug output > + * > + * This allows to enable debug output without a command line parameter and > + * without the enforcement of the command line parameter to run in foreground. > + * The daemon needs to handle either fuse_log output via stderr, or > + * redirection to its own logs or via syslog. > + * > + * @param se the session > + */ > +void fuse_session_set_debug(struct fuse_session *se); > + > /** > * Check if the request is submitted through fuse-io-uring > */ > diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c > index b10def03f3666757d312f87f177a560483691d6f..a7293a3898c37c3877eadf965d310ae2aa5cc2d1 100644 > --- a/lib/fuse_lowlevel.c > +++ b/lib/fuse_lowlevel.c > @@ -5007,3 +5007,8 @@ void fuse_session_want_sync_init(struct fuse_session *se) > return; > se->want_sync_init = true; > } > + > +void fuse_session_set_debug(struct fuse_session *se) > +{ > + se->debug = 1; > +} > diff --git a/lib/fuse_versionscript b/lib/fuse_versionscript > index f1765d39e13bc9b1f53e625b9a091c5fa53f5afd..64bf75ac2cb252d066ac301be8fc024b59f903ac 100644 > --- a/lib/fuse_versionscript > +++ b/lib/fuse_versionscript > @@ -230,6 +230,7 @@ FUSE_3.19 { > fuse_daemonize_start; > fuse_daemonize_signal; > fuse_daemonize_active; > + fuse_session_set_debug; > } FUSE_3.18; > > # Local Variables: > > -- > 2.43.0 > >