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GET /api/1.1/patches/2225141/?format=api
{ "id": 2225141, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2225141/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420201317.30199-2-junjie.cao@intel.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/projects/14/?format=api", "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": "<20260420201317.30199-2-junjie.cao@intel.com>", "date": "2026-04-20T20:13:15", "name": "[1/3] migration/qemu-file: switch buffer_at functions to positioned I/O _all helpers", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "e6fbdd138f212f2403e77dde2694b266846bc3d5", "submitter": { "id": 91537, "url": "http://patchwork.ozlabs.org/api/1.1/people/91537/?format=api", "name": "Junjie Cao", "email": "junjie.cao@intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420201317.30199-2-junjie.cao@intel.com/mbox/", "series": [ { "id": 500601, "url": "http://patchwork.ozlabs.org/api/1.1/series/500601/?format=api", "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/patches/2225141/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225141/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "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=SXEpMtJ5;\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 4fzkpx5JXbz1yGs\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 20 Apr 2026 22:11:05 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wEnSP-00069T-7Q; Mon, 20 Apr 2026 08:10:29 -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 <junjie.cao@intel.com>)\n id 1wEnSK-00066J-57\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 <junjie.cao@intel.com>)\n id 1wEnSH-0004MY-Cv\n for qemu-devel@nongnu.org; Mon, 20 Apr 2026 08:10:23 -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 05:10:20 -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 05:10:18 -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=1776687022; x=1808223022;\n h=from:to:cc:subject:date:message-id:in-reply-to:\n references:mime-version:content-transfer-encoding;\n bh=co6/EQDKeNJbkhw8y9V//WgV6dqwIupeKLjGfA2y7iY=;\n b=SXEpMtJ5UqQxpMdbPkGyM0+hY/IqfHSVzFrAWGrzu67P+BTxNVtOZ9p3\n 6Oma0RvlmMYuHR4bYck1SaqYBFVkQdo130jP9GssHEWsDZl1fmQyUPpsb\n OJiMKk8iqYHk5YNyMzj/SjE2zywSLOR9akahNkPOthXrWfpm5WVqEeeaC\n a1CMM5G5+diazWJPzHNV2a5GpH0LHAnJSUhanlWlS2dG1asM8ohuLH6Hk\n khOxnji10zNMJqXY40P6hXtBLC8P2Kuog4iiqYiCbKPGoHKJpHJ58GaEC\n dZvRoTxD3X30i8KxVzxzg1FJcd5W5LZ3V3izaUcBbb2WJpxRvW7PMJgpN Q==;", "X-CSE-ConnectionGUID": [ "dnb50RiMSTejaZSkqJdhUA==", "KwNelD88S9S0NFWqQHEElg==" ], "X-CSE-MsgGUID": [ "Ne/jMz14Q3yXDA6BXyCtVg==", "8JVGcnV3QB+kHj3nYjU63Q==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6800,10657,11762\"; a=\"88674219\"", "E=Sophos;i=\"6.23,189,1770624000\"; d=\"scan'208\";a=\"88674219\"", "E=Sophos;i=\"6.23,189,1770624000\"; d=\"scan'208\";a=\"235708261\"" ], "X-ExtLoop1": "1", "From": "Junjie Cao <junjie.cao@intel.com>", "To": "qemu-devel@nongnu.org", "Cc": "peterx@redhat.com,\n\tfarosas@suse.de,\n\tjunjie.cao@intel.com", "Subject": "[PATCH 1/3] migration/qemu-file: switch buffer_at functions to\n positioned I/O _all helpers", "Date": "Tue, 21 Apr 2026 04:13:15 +0800", "Message-ID": "<20260420201317.30199-2-junjie.cao@intel.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20260420201317.30199-1-junjie.cao@intel.com>", "References": "<20260420201317.30199-1-junjie.cao@intel.com>", "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 <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "qemu_put_buffer_at() and qemu_get_buffer_at() have the same pattern as\nthe bug fixed in multifd_file_recv_data(): the ssize_t return value from\nthe channel layer is stored in a size_t variable, and a short transfer\nwould be mishandled rather than retried.\n\nSwitch to qio_channel_pwrite_all() / qio_channel_pread_all() which\nhandle short transfers internally and make the code more robust and\nconsistent with the rest of the positioned I/O call sites.\n\nFixes: 7f5b50a401 (\"migration/qemu-file: add utility methods for working with seekable channels\")\nSigned-off-by: Junjie Cao <junjie.cao@intel.com>\n---\n migration/qemu-file.c | 35 +++--------------------------------\n 1 file changed, 3 insertions(+), 32 deletions(-)", "diff": "diff --git a/migration/qemu-file.c b/migration/qemu-file.c\nindex 9cf7dc3bd5..9dfb202203 100644\n--- a/migration/qemu-file.c\n+++ b/migration/qemu-file.c\n@@ -535,28 +535,13 @@ void qemu_put_buffer_at(QEMUFile *f, const uint8_t *buf, size_t buflen,\n off_t pos)\n {\n Error *err = NULL;\n- size_t ret;\n \n if (f->last_error) {\n return;\n }\n \n qemu_fflush(f);\n- ret = qio_channel_pwrite(f->ioc, (char *)buf, buflen, pos, &err);\n-\n- if (err) {\n- qemu_file_set_error_obj(f, -EIO, err);\n- return;\n- }\n-\n- if ((ssize_t)ret == QIO_CHANNEL_ERR_BLOCK) {\n- qemu_file_set_error_obj(f, -EAGAIN, NULL);\n- return;\n- }\n-\n- if (ret != buflen) {\n- error_setg(&err, \"Partial write of size %zu, expected %zu\", ret,\n- buflen);\n+ if (qio_channel_pwrite_all(f->ioc, buf, buflen, pos, &err) < 0) {\n qemu_file_set_error_obj(f, -EIO, err);\n return;\n }\n@@ -569,31 +554,17 @@ size_t qemu_get_buffer_at(QEMUFile *f, const uint8_t *buf, size_t buflen,\n off_t pos)\n {\n Error *err = NULL;\n- size_t ret;\n \n if (f->last_error) {\n return 0;\n }\n \n- ret = qio_channel_pread(f->ioc, (char *)buf, buflen, pos, &err);\n-\n- if ((ssize_t)ret == -1 || err) {\n+ if (qio_channel_pread_all(f->ioc, (char *)buf, buflen, pos, &err) < 0) {\n qemu_file_set_error_obj(f, -EIO, err);\n return 0;\n }\n \n- if ((ssize_t)ret == QIO_CHANNEL_ERR_BLOCK) {\n- qemu_file_set_error_obj(f, -EAGAIN, NULL);\n- return 0;\n- }\n-\n- if (ret != buflen) {\n- error_setg(&err, \"Partial read of size %zu, expected %zu\", ret, buflen);\n- qemu_file_set_error_obj(f, -EIO, err);\n- return 0;\n- }\n-\n- return ret;\n+ return buflen;\n }\n \n void qemu_set_offset(QEMUFile *f, off_t off, int whence)\n", "prefixes": [ "1/3" ] }