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GET /api/patches/2215588/?format=api
{ "id": 2215588, "url": "http://patchwork.ozlabs.org/api/patches/2215588/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260324194333.30004-8-farosas@suse.de/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/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": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260324194333.30004-8-farosas@suse.de>", "list_archive_url": null, "date": "2026-03-24T19:43:22", "name": "[RFC,v1,07/17] vmstate: Create and save ptr marker in same function", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c22609192794da89d97fd79861bdfa672277b081", "submitter": { "id": 85343, "url": "http://patchwork.ozlabs.org/api/people/85343/?format=api", "name": "Fabiano Rosas", "email": "farosas@suse.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260324194333.30004-8-farosas@suse.de/mbox/", "series": [ { "id": 497339, "url": "http://patchwork.ozlabs.org/api/series/497339/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=497339", "date": "2026-03-24T19:43:16", "name": "migration: vmstate_save|load changes for peterx", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497339/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2215588/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2215588/checks/", "tags": {}, "related": [], "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 (1024-bit key;\n unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=TABpM8iw;\n\tdkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=/8a1gdHF;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.a=rsa-sha256 header.s=susede2_rsa header.b=TABpM8iw;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=/8a1gdHF;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Tue, 24 Mar 2026 19:43:46 +0000" ], "DKIM-Signature": [ "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n t=1774381427;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=DYM15ZCEzaavHO8mCOfxSzn/Gfj4uM9ceO5chRfQkKE=;\n b=TABpM8iwc2H4gQwKsgCPnGx/irZo567NFpkHyMvvphLCZJ30PC9cDzs1ZvaAL7Gi4hle4m\n zZTuRQUe+msMk17u0FXKQ12uH+nIxBbzAhnzX1VabFs6RPDoFTvnYK3zI2BLmrsUGeeH2h\n 9oZ9+N5w60XrLhaG6z0kjXMvtMrnP8E=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1774381427;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=DYM15ZCEzaavHO8mCOfxSzn/Gfj4uM9ceO5chRfQkKE=;\n b=/8a1gdHFNDnUXPkzAKbp5tKs18MeYli+pR3dwqvDcJ2Sn3OxgcdfCYa9e9O55DbQxq0cAe\n VhCvi5YnEcTEK0Dw==", "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n t=1774381427;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=DYM15ZCEzaavHO8mCOfxSzn/Gfj4uM9ceO5chRfQkKE=;\n b=TABpM8iwc2H4gQwKsgCPnGx/irZo567NFpkHyMvvphLCZJ30PC9cDzs1ZvaAL7Gi4hle4m\n zZTuRQUe+msMk17u0FXKQ12uH+nIxBbzAhnzX1VabFs6RPDoFTvnYK3zI2BLmrsUGeeH2h\n 9oZ9+N5w60XrLhaG6z0kjXMvtMrnP8E=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1774381427;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=DYM15ZCEzaavHO8mCOfxSzn/Gfj4uM9ceO5chRfQkKE=;\n b=/8a1gdHFNDnUXPkzAKbp5tKs18MeYli+pR3dwqvDcJ2Sn3OxgcdfCYa9e9O55DbQxq0cAe\n VhCvi5YnEcTEK0Dw==" ], "From": "Fabiano Rosas <farosas@suse.de>", "To": "qemu-devel@nongnu.org", "Cc": "Peter Xu <peterx@redhat.com>,\n Alexander Mikhalitsyn <alexander@mihalicyn.com>,\n Juraj Marcin <jmarcin@redhat.com>", "Subject": "[RFC PATCH v1 07/17] vmstate: Create and save ptr marker in same\n function", "Date": "Tue, 24 Mar 2026 16:43:22 -0300", "Message-ID": "<20260324194333.30004-8-farosas@suse.de>", "X-Mailer": "git-send-email 2.51.0", "In-Reply-To": "<20260324194333.30004-1-farosas@suse.de>", "References": "<20260324194333.30004-1-farosas@suse.de>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Spamd-Result": "default: False [-3.01 / 50.00]; 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envelope-from=farosas@suse.de;\n helo=smtp-out1.suse.de", "X-Spam_score_int": "-43", "X-Spam_score": "-4.4", "X-Spam_bar": "----", "X-Spam_report": "(-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, 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": "Move the creation of the pointer marker along with the vmstate_save\ncall that writes it to the stream.\n\nSigned-off-by: Fabiano Rosas <farosas@suse.de>\n---\n migration/vmstate.c | 78 ++++++++++++++++++++++-----------------------\n 1 file changed, 39 insertions(+), 39 deletions(-)", "diff": "diff --git a/migration/vmstate.c b/migration/vmstate.c\nindex a190c3f63f..0975d10793 100644\n--- a/migration/vmstate.c\n+++ b/migration/vmstate.c\n@@ -54,36 +54,6 @@ vmstate_field_exists(const VMStateDescription *vmsd, const VMStateField *field,\n return result;\n }\n \n-/*\n- * Create a ptr marker field when there's a NULL pointer detected in the\n- * array of a VMS_ARRAY_OF_POINTER VMSD field. It's needed because we\n- * can't dereference the NULL pointer.\n- */\n-static const VMStateField *\n-vmsd_create_ptr_marker_field(const VMStateField *field)\n-{\n- VMStateField *fake = g_new0(VMStateField, 1);\n-\n- /* It can only happen on an array of pointers! */\n- assert(field->flags & VMS_ARRAY_OF_POINTER);\n-\n- /* Some of fake's properties should match the original's */\n- fake->name = field->name;\n- fake->version_id = field->version_id;\n-\n- /* Do not need \"field_exists\" check as it always exists (which is null) */\n- fake->field_exists = NULL;\n-\n- /* See vmstate_info_nullptr - use 1 byte to represent nullptr */\n- fake->size = 1;\n- fake->info = &vmstate_info_ptr_marker;\n- fake->flags = VMS_SINGLE;\n-\n- /* All the rest fields shouldn't matter.. */\n-\n- return (const VMStateField *)fake;\n-}\n-\n static int vmstate_n_elems(void *opaque, const VMStateField *field)\n {\n int n_elems = 1;\n@@ -592,6 +562,42 @@ vmstate_save_field_with_vmdesc(QEMUFile *f, void *pv, size_t size,\n return ok;\n }\n \n+/*\n+ * Create a ptr marker field to precede an element of a\n+ * VMS_ARRAY_OF_POINTER VMSD field. This indicates whether the\n+ * following element is a NULL pointer or a valid pointer. This is\n+ * used to know whether a pointer needs to be followed when loading\n+ * the data.\n+ */\n+static bool vmstate_ptr_marker_save(QEMUFile *f, void *opaque,\n+ const VMStateDescription *vmsd,\n+ const VMStateField *field,\n+ JSONWriter *vmdesc,\n+ int i, int max, Error **errp)\n+{\n+ g_autofree VMStateField *fake = g_new0(VMStateField, 1);\n+\n+ /* It can only happen on an array of pointers! */\n+ assert(field->flags & VMS_ARRAY_OF_POINTER);\n+\n+ /* Some of fake's properties should match the original's */\n+ fake->name = field->name;\n+ fake->version_id = field->version_id;\n+\n+ /* Do not need \"field_exists\" check as it always exists */\n+ fake->field_exists = NULL;\n+\n+ /* use 1 byte for the marker */\n+ fake->size = 1;\n+ fake->info = &vmstate_info_ptr_marker;\n+ fake->flags = VMS_SINGLE;\n+\n+ /* All the rest fields shouldn't matter.. */\n+\n+ return vmstate_save_field_with_vmdesc(f, opaque, field->size, vmsd, fake,\n+ vmdesc, i, max, errp);\n+}\n+\n static bool vmstate_save_vmsd_v(QEMUFile *f, const VMStateDescription *vmsd,\n void *opaque, JSONWriter *vmdesc,\n int version_id, Error **errp)\n@@ -635,7 +641,6 @@ static bool vmstate_save_vmsd_v(QEMUFile *f, const VMStateDescription *vmsd,\n int max_elems = n_elems - i;\n \n if (field->flags & VMS_ARRAY_OF_POINTER) {\n- const VMStateField *inner_field;\n bool use_marker_field, is_null, use_dynamic_array;\n \n assert(curr_elem);\n@@ -688,14 +693,9 @@ static bool vmstate_save_vmsd_v(QEMUFile *f, const VMStateDescription *vmsd,\n }\n \n if (use_marker_field) {\n- inner_field = vmsd_create_ptr_marker_field(field);\n-\n- ok = vmstate_save_field_with_vmdesc(\n- f, curr_elem, 1, vmsd, inner_field,\n- use_vmdesc ? vmdesc : NULL, i, max_elems, errp);\n-\n- g_clear_pointer((gpointer *)&inner_field, g_free);\n-\n+ ok = vmstate_ptr_marker_save(f, curr_elem, vmsd, field,\n+ use_vmdesc ? vmdesc : NULL,\n+ i, max_elems, errp);\n if (!ok) {\n goto out;\n }\n", "prefixes": [ "RFC", "v1", "07/17" ] }