From nobody Mon Apr 6 21:55:02 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1773789898; cv=none; d=zohomail.com; s=zohoarc; b=HqR0GEkI/vYuOzpV/1e7EDguvMkIEyaTqWC2fZMioxqBbfudKeH4ytXDOWpaGpxVTzeq/GXSudqLMu68aih5gqCC2zeYvyv4JFyIDGhzwCV843g1wUhYFXcP9Lrz0liQ66A8q5g/artcM5xOFeZcglXAIdgBlo6fYhZru27VFXE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1773789898; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=t3NlxwHq8kLfCc7uDMmSml3SsH2i/1WLYIAZ4DD4aAk=; b=TkQXOLMlSnkijkFpdfTUP4eFxTqUTmAxlKydgsKmbcx6iZ9MEbxxHhHBV5oTzIIS9RlSDQF4aVsHwOsQ9jQ5JXauAEO1LXR3teNQyWxjOkxHYCy8lUQD0aClNCxfChGmNrxUV5JsFBgWAs8RuYFEeTAGImLtl9txifkM83lQ2iU= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1773789898773358.5608995224684; Tue, 17 Mar 2026 16:24:58 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w2dlO-0003y6-TF; Tue, 17 Mar 2026 19:23:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w2dlN-0003xN-87 for qemu-devel@nongnu.org; Tue, 17 Mar 2026 19:23:49 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w2dlL-0006SZ-NI for qemu-devel@nongnu.org; Tue, 17 Mar 2026 19:23:48 -0400 Received: from mail-qv1-f70.google.com (mail-qv1-f70.google.com [209.85.219.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-45-gacc5mPQMAaDX_LAJrz7yg-1; Tue, 17 Mar 2026 19:23:45 -0400 Received: by mail-qv1-f70.google.com with SMTP id 6a1803df08f44-8950562d351so536721916d6.3 for ; Tue, 17 Mar 2026 16:23:45 -0700 (PDT) Received: from x1.local ([142.189.10.167]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-89c6b9ea39asm8203806d6.37.2026.03.17.16.23.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Mar 2026 16:23:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1773789827; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=t3NlxwHq8kLfCc7uDMmSml3SsH2i/1WLYIAZ4DD4aAk=; b=Wbxm27KXFqhjzvet5A9YNKLELqmVL1xuEHIm3tQYsq4pb03C2OaJN3gTYqkIgYFZmbZz7p DD85wMZFIUkTLJ5UR2sau4BWXPXhcV53sdfALw8emxULi0bo3+8dW/FpsW+U3FJlPatkkf curHOOC9yO+4nbQ426KT4+d9EX2sO2w= X-MC-Unique: gacc5mPQMAaDX_LAJrz7yg-1 X-Mimecast-MFC-AGG-ID: gacc5mPQMAaDX_LAJrz7yg_1773789825 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1773789825; x=1774394625; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=t3NlxwHq8kLfCc7uDMmSml3SsH2i/1WLYIAZ4DD4aAk=; b=Pm6cntEk/iAs1EZLVomG86xp1wqFLvT7XaJhyQysnlHoCzoV//6xS/h/OZ6IuJULma prfZswcOAPDKxCKD2DR3wpDUNxHSwK/QC2jlIcrTfahNmWa+6wazdxT+sfkgzsPqbvY9 ksZd9o83JFCYMLwAdMtS32FqAPWnWn6EL24rjZDDi/YaUS0vuE5LJv8q2VNPOS5cilV/ lrhoPX8zWA4lYaw/IVQUeODZ9m3fPRdZvFleJtq9ZWKrQNoreewdo/q358E7p9T0AYCY 03pmSjhITZzRRxIbfI6pQUs7hrpBiZW2qwIZ+VDLX/I02Qlgo8Ug3WeXnjPHpNrm9Azi eFmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1773789825; x=1774394625; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=t3NlxwHq8kLfCc7uDMmSml3SsH2i/1WLYIAZ4DD4aAk=; b=oKjW8xhvgw1wqqcU3fDWqp9wJl6Ne2Urey0wmxnwxWfWpypeiQ/KnKXNjGcOV5Zct9 Z4Tfqi5cLgnPs5Om4vXThjXG3Coe/brrQJY54gvGeBYdM0713SVSyq2l7nBlMzHKdgwn OAbyn9E0+V0xfDbMqhVPWDgR8v7KvQUOZHTulhDeD3TspneOpuav1j2vs9ow3cJTvK3K T1A989GMZJbfocXRUVWGxk1rPlM55/QHC6+4zxhMy0kx9FxNXmpHxtOH+ZLknFVULEOO QivryKQeuGz+R8YYBAattL+uWe0icWrMDkfn6cQP4i1Jt4JGHbnLNp/aBQloyyAGhMTu C5og== X-Gm-Message-State: AOJu0Yyp09NyvYJUFfcSCc9ZUcRiwd8iJCYwbDH0TuBdXAm58WQS7wN9 HnrQpsx+oLPFqhxYpjIIOEV94Mn5XxQFaXHm7CPMudgzDUwT7PtCNsSQlTep2l8HyjsJqL9bcX+ +H5p128NsV2XWc9G6AgkU38kQeSgwd4k6jhQfZWbi0CcA/Alr3Jlt9RCOL9fb2cZFc0+Kr/xi/W F2+PeKc+JG2TJX8vDntma6IGl9XJcqeaiDJ95u0g== X-Gm-Gg: ATEYQzwjEWlHZI0A97tAH3mHj89HLJMPpP1oZ82IEN/2stzHVH5M0K3Q9SZxKFwVHnw buffYmNVq04XtwgNxdCk5wuYcfnAZNpoa6qSAFFRmRzZPpLZ1haH19ffy6FbtQoemx0ZPOKggHQ yEYAjNf3cYl/HEeAvPZ6Q9Qt8h+D21kN7Q7/WD0eQPPN8Aq9CW6ibEI2TzgkU2TewPC+FTUAtVB t7Dpare3gIQ9zjJtLLwvTINq8zeRq+17CeGHEjO3hhDpLbvdstg8qzobEi+HEdZ5jlrOYkl41+S gf0eLA/+eAFof2UuS0NJsX8OVkL38WW2VY12PCZBz+5mwYiD3twzXh79076MsrKSZ47DEYEKwA/ EmScB+Z+w5HAgqA== X-Received: by 2002:a05:6214:319a:b0:899:f2ba:9d7e with SMTP id 6a1803df08f44-89c6b595f87mr23211746d6.38.1773789824668; Tue, 17 Mar 2026 16:23:44 -0700 (PDT) X-Received: by 2002:a05:6214:319a:b0:899:f2ba:9d7e with SMTP id 6a1803df08f44-89c6b595f87mr23211476d6.38.1773789824232; Tue, 17 Mar 2026 16:23:44 -0700 (PDT) From: Peter Xu To: qemu-devel@nongnu.org Cc: Alexander Mikhalitsyn , Juraj Marcin , peterx@redhat.com, Fabiano Rosas Subject: [PATCH RFC 06/10] vmstate: Introduce vmstate_save_field_with_vmdesc() Date: Tue, 17 Mar 2026 19:23:28 -0400 Message-ID: <20260317232332.15209-7-peterx@redhat.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260317232332.15209-1-peterx@redhat.com> References: <20260317232332.15209-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no 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: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1773789901817154100 Content-Type: text/plain; charset="utf-8" Introduce a helper to do both the JSON blob dump and vmstate dump. This further shrinks the function a bit. More importantly, we'll need to dump two fields in one loop very soon in the future with the JSON blob. Signed-off-by: Peter Xu Reviewed-by: Alexander Mikhalitsyn --- migration/vmstate.c | 38 +++++++++++++++++++++++++++----------- 1 file changed, 27 insertions(+), 11 deletions(-) diff --git a/migration/vmstate.c b/migration/vmstate.c index caa7b50bce..5a6b352764 100644 --- a/migration/vmstate.c +++ b/migration/vmstate.c @@ -514,6 +514,30 @@ static bool vmstate_save_field(QEMUFile *f, void *pv, = size_t size, return true; } =20 +/* + * Dump a whole VMSD field, including its JSON blob separately when @vmdesc + * is specified. + */ +static inline bool +vmstate_save_field_with_vmdesc(QEMUFile *f, void *pv, size_t size, + const VMStateDescription *vmsd, + const VMStateField *field, JSONWriter *vmde= sc, + int i, int max, Error **errp) +{ + uint64_t old_offset, written_bytes; + bool ok; + + vmsd_desc_field_start(vmsd, vmdesc, field, i, max); + + old_offset =3D qemu_file_transferred(f); + ok =3D vmstate_save_field(f, pv, size, field, vmdesc, errp); + written_bytes =3D qemu_file_transferred(f) - old_offset; + + vmsd_desc_field_end(vmsd, vmdesc, field, written_bytes); + + return ok; +} + static bool vmstate_save_vmsd_v(QEMUFile *f, const VMStateDescription *vms= d, void *opaque, JSONWriter *vmdesc, int version_id, Error **errp) @@ -542,7 +566,6 @@ static bool vmstate_save_vmsd_v(QEMUFile *f, const VMSt= ateDescription *vmsd, void *first_elem =3D opaque + field->offset; int i, n_elems =3D vmstate_n_elems(opaque, field); int size =3D vmstate_size(opaque, field); - uint64_t old_offset, written_bytes; JSONWriter *vmdesc_loop =3D vmdesc; bool is_prev_null =3D false; =20 @@ -558,7 +581,6 @@ static bool vmstate_save_vmsd_v(QEMUFile *f, const VMSt= ateDescription *vmsd, bool is_null; int max_elems =3D n_elems - i; =20 - old_offset =3D qemu_file_transferred(f); if (field->flags & VMS_ARRAY_OF_POINTER) { assert(curr_elem); curr_elem =3D *(void **)curr_elem; @@ -606,15 +628,9 @@ static bool vmstate_save_vmsd_v(QEMUFile *f, const VMS= tateDescription *vmsd, } } =20 - vmsd_desc_field_start(vmsd, vmdesc_loop, inner_field, - i, max_elems); - - ok =3D vmstate_save_field(f, curr_elem, size, inner_field, - vmdesc_loop, errp); - - written_bytes =3D qemu_file_transferred(f) - old_offset; - vmsd_desc_field_end(vmsd, vmdesc_loop, inner_field, - written_bytes); + ok =3D vmstate_save_field_with_vmdesc(f, curr_elem, size, = vmsd, + inner_field, vmdesc_lo= op, + i, max_elems, errp); =20 /* If we used a fake temp field.. free it now */ if (is_null) { --=20 2.50.1