{"id":2225142,"url":"http://patchwork.ozlabs.org/api/1.1/covers/2225142/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/cover/20260420201317.30199-1-junjie.cao@intel.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.1/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260420201317.30199-1-junjie.cao@intel.com>","date":"2026-04-20T20:13:14","name":"[0/3] migration: switch remaining positioned I/O to _all helpers","submitter":{"id":91537,"url":"http://patchwork.ozlabs.org/api/1.1/people/91537/?format=json","name":"Junjie Cao","email":"junjie.cao@intel.com"},"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/cover/20260420201317.30199-1-junjie.cao@intel.com/mbox/","series":[{"id":500601,"url":"http://patchwork.ozlabs.org/api/1.1/series/500601/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500601","date":"2026-04-20T20:13:15","name":"migration: switch remaining positioned I/O to _all helpers","version":1,"mbox":"http://patchwork.ozlabs.org/series/500601/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/2225142/comments/","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256\n header.s=Intel header.b=c6nI2WYe;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fzkqG00kbz1yGs\n\tfor ; Mon, 20 Apr 2026 22:11:21 +1000 (AEST)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1wEnSO-00069E-Dr; Mon, 20 Apr 2026 08:10:28 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1wEnSI-00065y-VU\n for qemu-devel@nongnu.org; Mon, 20 Apr 2026 08:10:25 -0400","from mgamail.intel.com ([198.175.65.13])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1wEnSE-0004LS-Te\n for qemu-devel@nongnu.org; Mon, 20 Apr 2026 08:10:22 -0400","from orviesa003.jf.intel.com ([10.64.159.143])\n by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;\n 20 Apr 2026 05:10:15 -0700","from junjie-optiplex-micro-plus-7010.bj.intel.com ([10.238.152.98])\n by ORVIESA003-auth.jf.intel.com with\n ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Apr 2026 05:10:13 -0700"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1776687020; x=1808223020;\n h=from:to:cc:subject:date:message-id:mime-version:\n content-transfer-encoding;\n bh=OlZhT4d147Vz4VQf3AFDJQdeb9CjW8ehhGdcHA16rqc=;\n b=c6nI2WYeFhZnwIyONLEDNFrfk51YviIYeC4OvwD9LMQmDOx+nhqMBpWB\n 1Ssp7n8PcO1vFELyu1w5BxSR0OFwJfnZzv3WGaxsoWwGV2U3WjsWlhamK\n rD91POnmUVEGAI78YEprRkaJXd/C/z5e2LdkHys/0EX3XW8PX2rEXURI4\n AuPtu7XagA0MbM8hymSPuLp21fD3UzNk/20hC1z/m5wtp80YzVAR2gRcc\n 7C8qUuCXH/YfKXxPO8VvwKujlV6YW/Ww/tHYf08hCyKwa7AYXfH4ePxZp\n MpYwb+ngTT0VaQJyDFo8o7WzPxs5gD5nVJNzyrASTJkmjxTOKl6HIajb2 w==;","X-CSE-ConnectionGUID":["iNo+yxsFQ+mc0ZxPuIaZ0Q==","T0bXxbg+RRuzQabSVoHaIw=="],"X-CSE-MsgGUID":["bmSWiZsnTlyjaClLLcRhfA==","sMOfYHiNShiDo1s1hzrnJw=="],"X-IronPort-AV":["E=McAfee;i=\"6800,10657,11762\"; a=\"88674191\"","E=Sophos;i=\"6.23,189,1770624000\"; d=\"scan'208\";a=\"88674191\"","E=Sophos;i=\"6.23,189,1770624000\"; d=\"scan'208\";a=\"235708250\""],"X-ExtLoop1":"1","From":"Junjie Cao ","To":"qemu-devel@nongnu.org","Cc":"peterx@redhat.com,\n\tfarosas@suse.de,\n\tjunjie.cao@intel.com","Subject":"[PATCH 0/3] migration: switch remaining positioned I/O to _all\n helpers","Date":"Tue, 21 Apr 2026 04:13:14 +0800","Message-ID":"<20260420201317.30199-1-junjie.cao@intel.com>","X-Mailer":"git-send-email 2.43.0","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Received-SPF":"pass client-ip=198.175.65.13;\n envelope-from=junjie.cao@intel.com;\n helo=mgamail.intel.com","X-Spam_score_int":"-24","X-Spam_score":"-2.5","X-Spam_bar":"--","X-Spam_report":"(-2.5 / 5.0 requ) BAYES_00=-1.9, DATE_IN_FUTURE_06_12=1.947,\n DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1,\n DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Follow-up to the pread/pwrite_all API series [1].\n\nqemu_put_buffer_at(), qemu_get_buffer_at(), and file_write_ramblock_iov()\nall use single-shot positioned I/O without retry. They share the same\npattern as the bug fixed in multifd_file_recv_data() where a short\ntransfer would be mishandled.\n\nConvert them to the _all helpers and clean up a pre-existing\nconst-correctness issue in qemu_get_buffer_at() along the way.\n\nAfter this series no positioned I/O call site in migration/ uses raw\nsingle-shot channel operations.\n\nDepends-on: <20260413214549.926435-1-junjie.cao@intel.com>\n(\"io/channel: complete pread/pwrite_all API and fix\nmultifd_file_recv_data\")\n\n[1] https://lore.kernel.org/qemu-devel/20260413214549.926435-1-junjie.cao@intel.com/\n\nJunjie Cao (3):\n migration/qemu-file: switch buffer_at functions to positioned I/O _all\n helpers\n migration/file: switch file_write_ramblock_iov to pwritev_all\n migration/qemu-file: drop incorrect const from qemu_get_buffer_at buf\n\n migration/file.c | 8 ++++----\n migration/qemu-file.c | 37 ++++---------------------------------\n migration/qemu-file.h | 2 +-\n 3 files changed, 9 insertions(+), 38 deletions(-)"}