From nobody Tue Apr 05 22:11:52 2022 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id CAF6B1A8805E for ; Tue, 5 Apr 2022 22:12:24 +0000 (UTC) (envelope-from darius@dons.net.au) Received: from midget.dons.net.au (2403-5800-5200-4700-225-90ff-fe47-39b4.ip6.aussiebb.net [IPv6:2403:5800:5200:4700:225:90ff:fe47:39b4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature ECDSA (P-384) client-digest SHA384) (Client CN "dons.net.au", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4KY21y3MKnz4vgV for ; Tue, 5 Apr 2022 22:12:21 +0000 (UTC) (envelope-from darius@dons.net.au) Received: from midget.dons.net.au (localhost [127.0.0.1]) by midget.dons.net.au (8.17.1/8.16.1) with ESMTPS id 235MC9vH067862 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Wed, 6 Apr 2022 07:42:13 +0930 (ACST) (envelope-from darius@dons.net.au) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=dons.net.au; s=default; t=1649196737; bh=hajmV3m2B7HG11aP6JpmFdHE9SHVIGpaBxHfMH5MVV4=; h=Subject:From:In-Reply-To:Date:Cc:References:To; b=dU/KXoU/u5g8WyCp5v8YHbj3Sq27yJuiNnHj1zKkwwxiqsoiTqH1uwkBsE98MAnQ3 EPJtjaWLDC6eZUTCvLtYNQr7DdAtmmZVHL/xN8MkQ5pSkVfmR/kCrGQwlfx73GXCiJ uISZESRRX+Cef4R8j1Q92XZeSQeoIJXTFQMOtANg= Received: (from mailnull@localhost) by midget.dons.net.au (8.17.1/8.16.1/Submit) id 235MBrJ5067827 for ; Wed, 6 Apr 2022 07:41:53 +0930 (ACST) (envelope-from darius@dons.net.au) X-MIMEDefang-Relay-0ce1a11234c790b6ab6410cd70c6fdb820520472: 2403:5800:5200:4700:911c:5511:b47e:d9d Received: from smtpclient.apple (2403-5800-5200-4700-911c-5511-b47e-d9d.ip6.aussiebb.net [2403:5800:5200:4700:911c:5511:b47e:d9d]) by 2403-5800-5200-4700-225-90ff-fe47-39b4.ip6.aussiebb.net (envelope-sender ) (MIMEDefang) with ESMTP id 235MBq9W067822; Wed, 06 Apr 2022 07:41:53 +0930 Content-Type: text/plain; charset=us-ascii List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.80.82.1.1\)) Subject: Re: PEFS and advisory locking on ZFS From: "Daniel O'Connor" In-Reply-To: Date: Wed, 6 Apr 2022 07:41:52 +0930 Cc: freebsd-hackers Content-Transfer-Encoding: quoted-printable Message-Id: <7EA062FC-54F8-48BB-958A-84C92652BEA3@dons.net.au> References: <03F69985-51A4-4A35-801C-CFC7B40B766D@dons.net.au> To: Alan Somers X-Mailer: Apple Mail (2.3696.80.82.1.1) X-Spam-Score: 0.7 () No, score=0.7 required=5.0 tests=KHOP_HELO_FCRDNS, PDS_RDNS_DYNAMIC_FP,RDNS_DYNAMIC,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE, T_SPF_PERMERROR autolearn=no autolearn_force=no version=3.4.5 X-Scanned-By: MIMEDefang 2.83 on 10.0.2.1 X-Rspamd-Queue-Id: 4KY21y3MKnz4vgV X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=dons.net.au header.s=default header.b="dU/KXoU/"; dmarc=pass (policy=quarantine) header.from=dons.net.au; spf=pass (mx1.freebsd.org: domain of darius@dons.net.au designates 2403:5800:5200:4700:225:90ff:fe47:39b4 as permitted sender) smtp.mailfrom=darius@dons.net.au X-Spamd-Result: default: False [-3.50 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[dons.net.au:s=default]; FROM_HAS_DN(0.00)[]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; NEURAL_HAM_LONG(-1.00)[-1.000]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[dons.net.au:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[dons.net.au,quarantine]; NEURAL_HAM_SHORT(-1.00)[-0.999]; MLMMJ_DEST(0.00)[freebsd-hackers]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:4764, ipnet:2403:5800::/32, country:AU]; MID_RHS_MATCH_FROM(0.00)[] X-ThisMailContainsUnwantedMimeParts: N > On 6 Apr 2022, at 06:27, Alan Somers wrote: >> ZFS itself is fine, the lock test passes if PEFS isn't mounted, and = on the same version PEFS on UFS works fine also. >>=20 >> I plan on bisecting it but if anyone has a suggestion I'm all ears. >=20 > Does it use flock or fcntl with F_GETLK/F_SETLK? Or worse, does it > mix the two? Is fusefs involved? And does it work on top of UFS? I tested with lockf(1) which uses flock(3) but the odd part is it works = on top of UFS but not ZFS.. -- Daniel O'Connor "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum