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 5A3B33B8BC8 for ; Fri, 6 Mar 2026 20:49:24 +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=1772830164; cv=none; b=umHmobK5IqdyP3ttpBdFQDmR0YoCHQwf1kXWGvMRrc7HDXAId1/iFLhoFiLEwDnQ859ioXjTCaR+DefgujV8taa3kxCUjgWS10BbX7Yh0ijf9N8AKr+0HFQERyLS3R5LMAc0EY1x1qlZ+6+bqFdOUlIoL0jeTGFWt6dfWxGfNHE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772830164; c=relaxed/simple; bh=bYIrppqWkG4TDnQwMmxdv/z8oSjeyIov9yq3652Vsjo=; h=Message-ID:Subject:From:To:Date:In-Reply-To:References: Content-Type:MIME-Version; b=rfDlLEgdxgJ4GwK7bF3yot5blxltrgvqWqBfCEoUPSGA2yB7FXRa2soRIT5FHbgapmDJhIEOZ22jv7uLQynGBifHYP3KP0FQ8uETzz4sTl7zmcCoPP+UscuQWIn2GaEETfc80kzf9QVAfqjG2LhAVMR6iOm6rEsA29Hi1jvcWLI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=r9M2hcub; 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="r9M2hcub" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A78BC4CEF7; Fri, 6 Mar 2026 20:49:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772830163; bh=bYIrppqWkG4TDnQwMmxdv/z8oSjeyIov9yq3652Vsjo=; h=Subject:From:To:Date:In-Reply-To:References:From; b=r9M2hcubrukTTMCkRyOq1NKQzq+ewbRBi1xT3zUxFHP+QrK8tT42OKd6LUZlhmo2o bxd3Gc5hu+h4nmOk6i3+VrH1whOxEd6z+9YUNbdOTOlExfIzNeqewoht7Mx/aLLI5r El72YMVCS6g49e+hZeuaRi9MPvQPSc5p+tRdE7PbN2GrRtFDSmsUO+l1Mfsag/o8cs m7P7D2RBljK828D5H7pScFWJf69tW7H+ribyJLJKYeRo2Q9D+83a+IsEaDhrLAwIgX 8qva6qivqlvpTjJF9ir/FXqoZ12QLJ8Ow8rtWtiOk3Pb5jBRKKoFvRtT+ct6eaftMB ha/XCcDxq2Ugw== Message-ID: <1fcd27cb44217d5db08e488528a2648c2906a435.camel@kernel.org> Subject: Re: Current state of nfsdv4 recovery. From: Jeff Layton To: Matthew Schumacher , linux-nfs@vger.kernel.org Date: Fri, 06 Mar 2026 15:49:21 -0500 In-Reply-To: <0d586513-819c-4af9-8c9f-8d09d326e547@schu.net> References: <0d586513-819c-4af9-8c9f-8d09d326e547@schu.net> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 0OX6MYPtv76hka8lW4mnRmZqqx3UtfHX/hF/zH24Gj7A6sYKYLCU3YrI2Ogiu7/ksKcl7goQjpvtV YrOOI5VGLHge0awt7bhMCTM9KAfPc+xL/ZxAMVWd3NCk5SamL2cE99UWgtvNOIYU8m6EjTLhsj8sn VluJH0/RcxEeFbnSaswVChNSGa7mXJrTR22lRL6ZPjdMgS2Km90haWPRc8Wolcz07Y2se0xpGVLEQ cDEsvv5IMmeMe1/qLZ6NaVkNuL3WOXvxaVT9USW1+/SGipO2IpKJjeDZfehlB/kpfF24+RrK+seQf CBYyUE8QJpvTZyfUHNYldXlrjO6n5MdOempLqWpfOmcGkwnyNRBR46g/jf8KnPRwXs509yAqDB6sE 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AaM1LRC28muq91WCFhs/nzHozpbzcheyGtMUI2Ao4K6mnY+3zIuXPygZMFr9KXE6fF7HzKxKuZMJO aEZCiDOq0anx6FmOzs5E6Jqdpo/mtI8beK+BE7Va6ni7YrQlnT0i3vaTVMTiCThbqsB20VrbMjlhp f8lfK1XVNbRq/R7GZ9zHESlsa35ha60yd/j3pu5hT2xyy8krV8vGhHvnJ1XRMJBAB/UYb6FyC7S+m QZIQXVeAA+smfTT0tDrisj1U5x6ZB9b3nBg65kc= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.3 (3.58.3-1.fc43) Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2026-03-06 at 11:46 -0800, Matthew Schumacher wrote: > Hello List, >=20 > I am building an HA nfsv4 cluster and need to have my locking migrate=20 > when a node fails or goes into standby for maint.=C2=A0 There is a lot of= =20 > documentation around the net, but some of it seems old, like this:=20 > https://wiki.linux-nfs.org/wiki/index.php/Nfsd4_server_recovery. I think= =20 > I have what I need worked out, but I'm still losing locks on recovery.=C2= =A0=20 > Can someone help me understand how this currently works or point me to= =20 > the up to date documentation? >=20 > This is what I'm currently doing: >=20 > Moving from nodeA to nodeB >=20 > NodeA: Remove nfsd ip address > NodeA: /usr/sbin/exportfs -au > NodeA: /usr/sbin/rpc.nfsd 0 > NodeA: killall --ns $$ -q -v -w rpc.mountd > NodeA: killall --ns $$ -q -v -w nfsdcld > NodeA: killall --ns $$ -q -v -w rpc.idmapd > NodeA: killall --ns $$ -q -v -w rpcbind > NodeA: umount /var/lib/nfs/rpc_pipefs > NodeA: zpool export (which umounts /var/lib/nfs) >=20 > NodeB: zpool import (which mounts /var/lib/nfs) > NodeB: mount /proc/fs/nfs if not previously mounted > NodeB: mount -t rpc_pipefs -o nodev sunrpc /var/lib/nfs/rpc_pipefs > NodeB: /sbin/rpcbind -l -w > NodeB: /usr/sbin/rpc.idmapd > NodeB: /usr/sbin/nfsdcld -d > NodeB: /usr/sbin/exportfs -av > NodeB: /usr/sbin/rpc.mountd > NodeB: /usr/sbin/rpc.nfsd -s -V 4.2 -U -t 8 > NodeB: start nfsd ip address >=20 > From what I understand, nfsdcld writes the lock information to=20 > /var/lib/nfs/nfsdcltrack/main.sqlite which is moved to the other side=20 > and everything is started, but I still lose locks when I migrate. >=20 > Mar=C2=A0 6 08:39:14 nfsha user.warn kernel: [37675.787509] NFS:=20 > 10.255.255.3: lost 1 locks >=20 > I think the problem is that kernel (6.12.74) isn't getting the locks=20 > reported to it when nfsdcld starts.=C2=A0 Here are some logs: >=20 > Mar=C2=A0 6 08:38:46 nfsha daemon.warn rpc.idmapd[14113]: Setting log lev= el to 0 > Mar=C2=A0 6 08:38:46 nfsha daemon.warn rpc.idmapd[14113]: libnfsidmap: Un= able=20 > to determine the NFSv4 domain; Using 'localdomain' as the NFSv4 domain= =20 > which means UIDs will be mapped to the 'Nobody-User' user defined in=20 > /etc/idmapd.conf > Mar=C2=A0 6 08:38:46 nfsha daemon.info nfsdcld[14116]:=20 > sqlite_startup_query_grace: current_epoch=3D2 recovery_epoch=3D1 > Mar=C2=A0 6 08:38:46 nfsha daemon.info nfsdcld[14116]:=20 > sqlite_check_db_health: returning 0 > Mar=C2=A0 6 08:38:46 nfsha daemon.info nfsdcld[14116]: attaching=20 > /var/lib/nfs/nfsdcltrack/main.sqlite > Mar=C2=A0 6 08:38:46 nfsha daemon.notice rpc.mountd[14125]: Version 2.8.5= =20 > starting > Mar=C2=A0 6 08:38:46 nfsha daemon.info nfsdcld[14116]: detaching database > Mar=C2=A0 6 08:38:46 nfsha daemon.info nfsdcld[14116]:=20 > sqlite_copy_cltrack_records: returning 0 > Mar=C2=A0 6 08:38:46 nfsha daemon.info nfsdcld[14116]: sqlite_prepare_dbh= :=20 > num_cltrack_records =3D 2 > Mar=C2=A0 6 08:38:47 nfsha user.info kernel: [37649.053531] NFSD: Using U= MH=20 > upcall client tracking operations. > Mar=C2=A0 6 08:38:47 nfsha user.info kernel: [37649.055262] NFSD: Using U= MH=20 > upcall client tracking operations. The kernel failed to recognize the cld upcall for some reason, so it fell back to running the usermodehelper upcall. > Mar=C2=A0 6 08:38:47 nfsha user.info kernel: [37649.055264] NFSD: startin= g=20 > 90-second grace period (net f0000000) > Mar=C2=A0 6 08:38:47 nfsha daemon.info nfsdcld[14116]: sqlite_prepare_dbh= :=20 > num_legacy_records =3D 0 > Mar=C2=A0 6 08:38:47 nfsha daemon.info nfsdcld[14116]: cld_pipe_init: ini= t=20 > pipe handlers > Mar=C2=A0 6 08:38:47 nfsha daemon.info nfsdcld[14116]: cld_pipe_open: ope= ning=20 > upcall pipe /var/lib/nfs/rpc_pipefs/nfsd/cld > Mar=C2=A0 6 08:38:47 nfsha daemon.info nfsdcld[14116]: cld_pipe_open: ope= n of=20 > /var/lib/nfs/rpc_pipefs/nfsd/cld failed: No such file or directory > Mar=C2=A0 6 08:38:47 nfsha daemon.info nfsdcld[14116]: main: Starting eve= nt=20 > dispatch handler. > Mar=C2=A0 6 08:38:47 nfsha daemon.info IPaddr(failover-ip)[14153]: INFO: = eval=20 > ifconfig eth3:0 10.255.255.3 netmask 255.255.255.0 broadcast 10.255.255.2= 55 > Mar=C2=A0 6 08:38:47 nfsha daemon.notice rpc.mountd[14125]: v4.2 client= =20 > attached: 0x7bdfeba269ab0316 from "10.255.255.2:47380" > Mar=C2=A0 6 08:39:13 nfsha daemon.notice rpc.mountd[14125]: v4.2 client= =20 > attached: 0x7bdfeba369ab0316 from "10.255.255.1:49220" > Mar=C2=A0 6 08:39:14 nfsha user.warn kernel: [37675.787509] NFS:=20 > 10.255.255.3: lost 1 locks >=20 > I think the problem is that nfsdcld can't pass the locks to the kernel= =20 > using /var/lib/nfs/rpc_pipefs/nfsd/cld as it's missing.=C2=A0 I'm not sur= e=20 > why, /var/lib/nfs/rpc_pipefs/ has everything else: >=20 > find /var/lib/nfs/rpc_pipefs/ > /var/lib/nfs/rpc_pipefs/ > /var/lib/nfs/rpc_pipefs/gssd > /var/lib/nfs/rpc_pipefs/gssd/clntXX > /var/lib/nfs/rpc_pipefs/gssd/clntXX/gssd > /var/lib/nfs/rpc_pipefs/gssd/clntXX/info > /var/lib/nfs/rpc_pipefs/nfsd > /var/lib/nfs/rpc_pipefs/cache > /var/lib/nfs/rpc_pipefs/nfsd4_cb > /var/lib/nfs/rpc_pipefs/statd > /var/lib/nfs/rpc_pipefs/portmap > /var/lib/nfs/rpc_pipefs/nfs > /var/lib/nfs/rpc_pipefs/nfs/blocklayout > /var/lib/nfs/rpc_pipefs/nfs/clnt1 > /var/lib/nfs/rpc_pipefs/nfs/clnt1/info > /var/lib/nfs/rpc_pipefs/nfs/clnt0 > /var/lib/nfs/rpc_pipefs/nfs/clnt0/info > /var/lib/nfs/rpc_pipefs/mount > /var/lib/nfs/rpc_pipefs/lockd >=20 That's very odd. You might want to look in dmesg and see if there are any warnings in there about creating the pipes in rpc_pipefs. > Anyone able to point me in the right direction?=C2=A0 I feel like I'm pre= tty=20 > close to getting this to work. --=20 Jeff Layton