From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9857CC433B4 for ; Sun, 11 Apr 2021 05:34:37 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4637E611AD for ; Sun, 11 Apr 2021 05:34:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4637E611AD Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.108376.206874 (Exim 4.92) (envelope-from ) id 1lVSjl-0004Du-Cd; Sun, 11 Apr 2021 05:34:21 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 108376.206874; Sun, 11 Apr 2021 05:34:21 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lVSjl-0004Dn-9W; Sun, 11 Apr 2021 05:34:21 +0000 Received: by outflank-mailman (input) for mailman id 108376; Sun, 11 Apr 2021 05:34:20 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lVSjj-0004Di-VB for xen-devel@lists.xenproject.org; Sun, 11 Apr 2021 05:34:19 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id c197115b-5a91-4d45-8207-3dcf9cf612da; Sun, 11 Apr 2021 05:34:18 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id AE31CAEB6; Sun, 11 Apr 2021 05:34:17 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: c197115b-5a91-4d45-8207-3dcf9cf612da X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1618119257; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=sG3BNuAw3+Fh0IlaF5NlAouMGBXgqhZROTRMgZgP8cw=; b=DaIkO0D4whttNxaKinpQhZ3dgEpvqyvmPSPZ9efROgO/xUrUQXNet6ETnDhpSD4CzFKTET 0xy2c8UoQOG5QZv45oQppcz0vhOqU2kSLnpr9fuYKviHKucwojdf7gERvbIDe6UCNVRjIN /zFPBIo6FMR+ZkjX5BHxnx8UKaXLrxg= Subject: Re: xenstore utils dropped support for -s in 4.15 To: Henrik Riomar , xen-devel@lists.xenproject.org References: <20210411000215.0d0f4015bbfab8b1f20876bb@riomar.se> From: Juergen Gross Message-ID: <215bcc74-baff-6345-73ed-16f7da266a1b@suse.com> Date: Sun, 11 Apr 2021 07:34:16 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <20210411000215.0d0f4015bbfab8b1f20876bb@riomar.se> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="2dmD4BbUrtvlsodY5R1yhseiCJEwwWQ1T" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --2dmD4BbUrtvlsodY5R1yhseiCJEwwWQ1T Content-Type: multipart/mixed; boundary="uDsvZhSRg6XDBko65kvXUX4dRgHBVx0eF"; protected-headers="v1" From: Juergen Gross To: Henrik Riomar , xen-devel@lists.xenproject.org Message-ID: <215bcc74-baff-6345-73ed-16f7da266a1b@suse.com> Subject: Re: xenstore utils dropped support for -s in 4.15 References: <20210411000215.0d0f4015bbfab8b1f20876bb@riomar.se> In-Reply-To: <20210411000215.0d0f4015bbfab8b1f20876bb@riomar.se> --uDsvZhSRg6XDBko65kvXUX4dRgHBVx0eF Content-Type: multipart/mixed; boundary="------------B82B82BB0A73106FEE33F962" Content-Language: en-US This is a multi-part message in MIME format. --------------B82B82BB0A73106FEE33F962 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 11.04.21 00:02, Henrik Riomar wrote: > Hi, >=20 > In Alpine and Debian (probably elsewhere as well), the -s flag removed = in these two commits: > * https://github.com/xen-project/xen/commit/fa06cb8c38832aafe597d7190= 40ba1d216e367b8 > * https://github.com/xen-project/xen/commit/c65687ed16d2289ec91036ec2= 862a4b4bd34ea4f > is actually used in the init scripts. >=20 > On one of the systems I tested 4.15 on things just hangs due to this: > 2222 open("/lib/libxentoolcore.so.1", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = =3D -1 ENOENT (No such file or directory) > 2222 open("/usr/local/lib/libxentoolcore.so.1", O_RDONLY|O_LARGEFILE|O= _CLOEXEC) =3D -1 ENOENT (No such file or directory) > 2222 open("/usr/lib/libxentoolcore.so.1", O_RDONLY|O_LARGEFILE|O_CLOEX= EC) =3D 3 > 2222 fcntl(3, F_SETFD, FD_CLOEXEC) =3D 0 > 2222 fstat(3, {st_mode=3DS_IFREG|0755, st_size=3D14072, ...}) =3D 0 > 2222 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\240\20\0\= 0\0\0\0\0"..., 960) =3D 960 > 2222 mmap(NULL, 20480, PROT_READ, MAP_PRIVATE, 3, 0) =3D 0x7f9925c0200= 0 > 2222 mmap(0x7f9925c03000, 4096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_F= IXED, 3, 0x1000) =3D 0x7f9925c03000 > 2222 mmap(0x7f9925c04000, 4096, PROT_READ, MAP_PRIVATE|MAP_FIXED, 3, 0= x2000) =3D 0x7f9925c04000 > 2222 mmap(0x7f9925c05000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_= FIXED, 3, 0x2000) =3D 0x7f9925c05000 > 2222 close(3) =3D 0 > 2222 mprotect(0x7f9925c0f000, 4096, PROT_READ) =3D 0 > 2222 mprotect(0x7f9925ca6000, 4096, PROT_READ) =3D 0 > 2222 mprotect(0x7f9925c05000, 4096, PROT_READ) =3D 0 > 2222 mprotect(0x5601e65dc000, 4096, PROT_READ) =3D 0 > 2222 stat("/var/run/xenstored/socket", 0x7ffd95b9f080) =3D -1 ENOENT (= No such file or directory) > 2222 access("/dev/xen/xenbus", F_OK) =3D 0 > 2222 stat("/dev/xen/xenbus", {st_mode=3DS_IFCHR|0600, st_rdev=3Dmakede= v(0xa, 0x3e), ...}) =3D 0 > 2222 open("/dev/xen/xenbus", O_RDWR|O_LARGEFILE) =3D 3 > 2222 rt_sigaction(SIGPIPE, {sa_handler=3DSIG_IGN, sa_mask=3D[], sa_fla= gs=3DSA_RESTORER, sa_restorer=3D0x7f9925c59c4b}, {sa_handler=3DSIG_DFL, s= a_mask=3D[], sa_flags=3D0}, 8) =3D 0 > 2222 write(3, "\2\0\0\0\0\0\0\0\0\0\0\0\2\0\0\0", 16) =3D 16 > 2222 write(3, "/\0", 2) =3D 2 > 2222 read(3, >=20 > Reverting the two commits mentioned above restores a booting system. >=20 > The -s flag was introduced in 2005 or so, so I guess you can say that d= ropping it should > at least be mentioned in the release notices, and an alternative be des= cribed, or > -s functionally should be brought back. The -s served exactly no purpose. It was meant to force socket usage. A socket will be used anyway in case xenstored is running in dom0, so specifying -s won't change anything in this case. In case xenstored is running in a stubdom specifying -s will result in the utility NOT working, as there is no socket connection to xenstored available. 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