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 E2975200A3 for ; Thu, 19 Dec 2024 14:06:58 +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=1734617219; cv=none; b=olzB9tF8tWMWaKR0IXkylvE12qHRC9nVhY+QeOnq3VXNRV88OrAF9TZfrbxDSOTAcT/R7vMeIR0V4+pUXJbcvtFd/Ni6C5aJlp7ezt2wCm/KqFsKYRqwYlzhHpkYhh5nr6Cft2UUVl9oq9HH36zhaW5/HXm/a5JSfKOVTDe30BE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734617219; c=relaxed/simple; bh=ualDn3TjmXuwqtqhc4e/EyoK+C/kWp2LzsnUMU24KKU=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=Lm/x6TSXPjESzz9iKKupTBIWIFEo9BpPgMg7o7xU47azlQuWjVz3ZGuNnpF9NghYaRedDMUwDiI2PVd1eybLNOqPz7Fq1ch96kb6BC/3D6GXHKchyORs/w6c9BKgQVnNQKNirIP4kIP6N+BkTR/DXqQNEobA3IBZQ92PGltg+bQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XclLbrMu; 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="XclLbrMu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0D76C4CECE; Thu, 19 Dec 2024 14:06:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734617218; bh=ualDn3TjmXuwqtqhc4e/EyoK+C/kWp2LzsnUMU24KKU=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=XclLbrMuz0a+V0o+O95Fyne/NYMiz0OGSr9p4OUvED0MarxbipHVDMsIQHJATWTNh TaK1kxMP6y/Vb3F4LgvFC0PD/PfppjQrU/Bf9DpeBPOwaUGartLvNh3Ks3DTZYa+pF akyljxTQBWBgmoMF3CdjNajcO8rMjA4whWjYkU1Csov1U82CBXIoUT0RvG+/frHY+t smrXcyejSAis8URbdca9oHlOdIq8zg/vcM+JknrKxENbARVpNRlTo6fLhoQjCLNmkr +JOh/3lBp/K/ovHRv1PfnkqiFo8dfyAM1r70UeJ0Isq4po055l+trJTl7oVwO2rwgU vx7a5wHxocsiA== Message-ID: Subject: Re: [PATCH v11 1/2] fuse: add kernel-enforced timeout option for requests From: Jeff Layton To: Joanne Koong , miklos@szeredi.hu, linux-fsdevel@vger.kernel.org Cc: josef@toxicpanda.com, bernd.schubert@fastmail.fm, jefflexu@linux.alibaba.com, laoar.shao@gmail.com, senozhatsky@chromium.org, tfiga@chromium.org, bgeffon@google.com, etmartin4313@gmail.com, kernel-team@meta.com Date: Thu, 19 Dec 2024 09:06:56 -0500 In-Reply-To: <4ab1f4dee6e15787ecdc304ce9e46bef06b9dffa.camel@kernel.org> References: <20241218222630.99920-1-joannelkoong@gmail.com> <20241218222630.99920-2-joannelkoong@gmail.com> <4ab1f4dee6e15787ecdc304ce9e46bef06b9dffa.camel@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw 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Evolution 3.52.4 (3.52.4-2.fc40) Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Thu, 2024-12-19 at 07:19 -0500, Jeff Layton wrote: > On Wed, 2024-12-18 at 14:26 -0800, Joanne Koong wrote: > > There are situations where fuse servers can become unresponsive or > > stuck, for example if the server is deadlocked. Currently, there's no > > good way to detect if a server is stuck and needs to be killed manually= . > >=20 > > This commit adds an option for enforcing a timeout (in seconds) for > > requests where if the timeout elapses without the server responding to > > the request, the connection will be automatically aborted. > >=20 > > Please note that these timeouts are not 100% precise. For example, the > > request may take roughly an extra FUSE_TIMEOUT_TIMER_FREQ seconds beyon= d > > the requested timeout due to internal implementation, in order to > > mitigate overhead. > >=20 > > Signed-off-by: Joanne Koong > > --- > > fs/fuse/dev.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++ > > fs/fuse/fuse_i.h | 22 +++++++++++++ > > fs/fuse/inode.c | 23 +++++++++++++ > > 3 files changed, 130 insertions(+) > >=20 > > diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c > > index 27ccae63495d..bcf8a7994944 100644 > > --- a/fs/fuse/dev.c > > +++ b/fs/fuse/dev.c > > @@ -45,6 +45,87 @@ static struct fuse_dev *fuse_get_dev(struct file *fi= le) > > return READ_ONCE(file->private_data); > > } > > =20 > > +static bool request_expired(struct fuse_conn *fc, struct list_head *li= st) > > +{ > > + struct fuse_req *req; > > + > > + req =3D list_first_entry_or_null(list, struct fuse_req, list); > > + if (!req) > > + return false; > > + return time_is_before_jiffies(req->create_time + fc->timeout.req_time= out); > > +} >=20 > Shouldn't that be time_is_after_jiffies() ? This is going to return > true when you've not yet hit the timeout, no? >=20 My mistake, I misinterpreted the time_is_before_jiffies() macro. You can add: Reviewed-by: Jeff Layton