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 D2B3019F487; Tue, 10 Sep 2024 15:45:06 +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=1725983107; cv=none; b=bDDN4pUsOXx0gMvuEDBtfIxRQPiUk2YY6krbmnagO63YUZkZ+q5q1TI+o2RS2wleHQPKKr07X93to0pqqMM1QBbbj0LtgLfYzBWkEp/EwHkwxFLTjy64UjuNn/gyoi1sjc7zQ2kpEvyMjBy8Cjb4GtDxJs180+Sv7YcR/+vydqY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725983107; c=relaxed/simple; bh=vKCyFrWSwfOvxxQ1vTj26ssmrkTu2qvbldV4m2Zs06A=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=r4TicwVez4cgujENn+nqaQfu/bDBz5z+0lE8FrWSmi+exLZd/nKA8hWowliNMpg06al71ulV49WzReIHoQMbXeaw6TjPaN24pbyNnAbidVlv12zPRmEx/tOW+i+1gYiYlmugSZ5zLvN1fT0h45+px4HK0o9ElB2Ep3etmrpARP4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NKhBvJaQ; 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="NKhBvJaQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66F10C4CEC3; Tue, 10 Sep 2024 15:45:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725983106; bh=vKCyFrWSwfOvxxQ1vTj26ssmrkTu2qvbldV4m2Zs06A=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=NKhBvJaQwYzTwcNMMH24gL3c+zK2UyrFQT2DXmMit4wXe/PBrxMFChrrx3OUz10Wu BCKptE0ZMT3YnguU7Bb8/G//2t972XAzWPhrO19e7D2GpohoZv/FnJC8Ujn46icJ8Z XK2w3JrUxHCSwkk6ygr2o6rh0on9Ot2LvxIVJD1uE7j758YAPFM282Gtv+FfQm2apg 6a5AWZyaSng8hab5CWDC51M5PtkmmxTsHoD6V0XSOXNKMX7JBNFswlCnPXQ0HoaRRP dxyvFJUZa/S4UhRA5Bb50rk8TiCtjmjvm5NNIuUQ0qk7Zn306skH3ItxpQ9Ovb/hv4 PJ2c9W+3M7EeQ== Message-ID: <1490adc3ae3f82968c6112bb6f9df3c3f2229b04.camel@kernel.org> Subject: Re: [PATCH 1/7] lockd: introduce safe async lock op From: Jeff Layton To: Benjamin Coddington , Alexander Aring Cc: linux-nfs@vger.kernel.org, ocfs2-devel@lists.linux.dev, linux-fsdevel@vger.kernel.org, teigland@redhat.com, rpeterso@redhat.com, agruenba@redhat.com, trond.myklebust@hammerspace.com, anna@kernel.org, chuck.lever@oracle.com Date: Tue, 10 Sep 2024 11:45:04 -0400 In-Reply-To: References: <20230823213352.1971009-1-aahringo@redhat.com> <20230823213352.1971009-2-aahringo@redhat.com> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv 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linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Tue, 2024-09-10 at 10:18 -0400, Benjamin Coddington wrote: > On 23 Aug 2023, at 17:33, Alexander Aring wrote: >=20 > > This patch reverts mostly commit 40595cdc93ed ("nfs: block notification > > on fs with its own ->lock") and introduces an EXPORT_OP_SAFE_ASYNC_LOCK > > export flag to signal that the "own ->lock" implementation supports > > async lock requests. The only main user is DLM that is used by GFS2 and > > OCFS2 filesystem. Those implement their own lock() implementation and > > return FILE_LOCK_DEFERRED as return value. Since commit 40595cdc93ed > > ("nfs: block notification on fs with its own ->lock") the DLM > > implementation were never updated. This patch should prepare for DLM > > to set the EXPORT_OP_SAFE_ASYNC_LOCK export flag and update the DLM > > plock implementation regarding to it. > >=20 > > Acked-by: Jeff Layton > > Signed-off-by: Alexander Aring > > --- > > fs/lockd/svclock.c | 5 ++--- > > fs/nfsd/nfs4state.c | 13 ++++++++++--- > > include/linux/exportfs.h | 8 ++++++++ > > 3 files changed, 20 insertions(+), 6 deletions(-) > >=20 > > diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c > > index c43ccdf28ed9..6e3b230e8317 100644 > > --- a/fs/lockd/svclock.c > > +++ b/fs/lockd/svclock.c > > @@ -470,9 +470,7 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file= *file, > > struct nlm_host *host, struct nlm_lock *lock, int wait, > > struct nlm_cookie *cookie, int reclaim) > > { > > -#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) > > struct inode *inode =3D nlmsvc_file_inode(file); > > -#endif > > struct nlm_block *block =3D NULL; > > int error; > > int mode; > > @@ -486,7 +484,8 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file= *file, > > (long long)lock->fl.fl_end, > > wait); > >=20 > > - if (nlmsvc_file_file(file)->f_op->lock) { > > + if (!export_op_support_safe_async_lock(inode->i_sb->s_export_op, > > + nlmsvc_file_file(file)->f_op)) { >=20 > ... but don't most filesystem use VFS' posix_lock_file(), which does the > right thing? I think this patch has broken async lock callbacks for NLM = for > all the other filesystems that just use posix_lock_file(). >=20 > Maybe I'm missing something, but why was that necessary? >=20 Good catch. Yeah, I think that probably should have been an && condition. IOW: if (nlmsvc_file_file(file)->f_op->lock && !export_op_support_safe_async_lock(inode->i_sb->s_export_op, Alex, thoughts? --=20 Jeff Layton