{"id":2198128,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2198128/?format=json","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.0/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":"<20260219115530.2019498-5-vsementsov@yandex-team.ru>","date":"2026-02-19T11:55:25","name":"[v11,4/8] net: introduce vmstate_net_peer_backend","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"cec2bb2dae8d50dbb4eb123321557c3894adde6a","submitter":{"id":84116,"url":"http://patchwork.ozlabs.org/api/1.0/people/84116/?format=json","name":"Vladimir Sementsov-Ogievskiy","email":"vsementsov@yandex-team.ru"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260219115530.2019498-5-vsementsov@yandex-team.ru/mbox/","series":[{"id":492667,"url":"http://patchwork.ozlabs.org/api/1.0/series/492667/?format=json","date":"2026-02-19T11:55:27","name":"virtio-net: live-TAP local migration","version":11,"mbox":"http://patchwork.ozlabs.org/series/492667/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2198128/checks/","tags":{},"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 (1024-bit key;\n unprotected) header.d=yandex-team.ru header.i=@yandex-team.ru\n header.a=rsa-sha256 header.s=default header.b=ndy7lZ53;\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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Thu, 19 Feb 2026 06:55:43 -0500","from mail-nwsmtp-smtp-corp-main-34.sas.yp-c.yandex.net\n (mail-nwsmtp-smtp-corp-main-34.sas.yp-c.yandex.net\n [IPv6:2a02:6b8:c24:fa2:0:640:41ee:0])\n by forwardcorp1b.mail.yandex.net (Yandex) with ESMTPS id DB13F808A6;\n Thu, 19 Feb 2026 14:55:38 +0300 (MSK)","from vsementsov-lin (unknown [2a02:6bf:8080:192::1:26])\n by mail-nwsmtp-smtp-corp-main-34.sas.yp-c.yandex.net (smtpcorp/Yandex) with\n ESMTPSA id VtZwpM4A6uQ0-T5PuHanP; Thu, 19 Feb 2026 14:55:38 +0300"],"Precedence":"bulk","X-Yandex-Fwd":"1","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru;\n s=default; t=1771502138;\n bh=uKqjTTla0ppSaS2iWSAYfvEBzwmJeIAv2EL1JoBxCqU=;\n h=Message-ID:Date:In-Reply-To:Cc:Subject:References:To:From;\n b=ndy7lZ53HSoiauG6hrkn+rAsgSzyXlUM14FHyYHosTi9Bz+dvEtlwOqtO+rUEPUHp\n urTLT7JfYYW+dF7/Raype//LiEG4wBt+R/NWUw7N2sHC6rjR81IjvOmc+ZAgJhxbaM\n B2e/xedsfOlunfaZe6tSKEXhTlmDXLU5aAV7iYFI=","From":"Vladimir Sementsov-Ogievskiy ","To":"jasowang@redhat.com,\n\tmst@redhat.com","Cc":"thuth@redhat.com, armbru@redhat.com, eblake@redhat.com, farosas@suse.de,\n peterx@redhat.com, zhao1.liu@intel.com, wangyanan55@huawei.com,\n philmd@linaro.org, marcel.apfelbaum@gmail.com, eduardo@habkost.net,\n davydov-max@yandex-team.ru, qemu-devel@nongnu.org,\n vsementsov@yandex-team.ru, yc-core@yandex-team.ru, leiyang@redhat.com,\n raphael.s.norwitz@gmail.com, bchaney@akamai.com","Subject":"[PATCH v11 4/8] net: introduce vmstate_net_peer_backend","Date":"Thu, 19 Feb 2026 14:55:25 +0300","Message-ID":"<20260219115530.2019498-5-vsementsov@yandex-team.ru>","X-Mailer":"git-send-email 2.52.0","In-Reply-To":"<20260219115530.2019498-1-vsementsov@yandex-team.ru>","References":"<20260219115530.2019498-1-vsementsov@yandex-team.ru>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Received-SPF":"pass client-ip=178.154.239.136;\n envelope-from=vsementsov@yandex-team.ru; helo=forwardcorp1b.mail.yandex.net","X-Spam_score_int":"-20","X-Spam_score":"-2.1","X-Spam_bar":"--","X-Spam_report":"(-2.1 / 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_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,\n SPF_HELO_NONE=0.001, 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","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":"To implement backend migration in virtio-net in the next commit, we need\na generic API to migrate net backend. Here is it.\n\nSigned-off-by: Vladimir Sementsov-Ogievskiy \n---\n include/net/net.h | 4 ++++\n net/net.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++\n 2 files changed, 51 insertions(+)","diff":"diff --git a/include/net/net.h b/include/net/net.h\nindex 45bc86fc86..aa34043b1a 100644\n--- a/include/net/net.h\n+++ b/include/net/net.h\n@@ -5,6 +5,7 @@\n #include \"qapi/qapi-types-net.h\"\n #include \"net/queue.h\"\n #include \"hw/core/qdev-properties-system.h\"\n+#include \"migration/vmstate.h\"\n \n #define MAC_FMT \"%02X:%02X:%02X:%02X:%02X:%02X\"\n #define MAC_ARG(x) ((uint8_t *)(x))[0], ((uint8_t *)(x))[1], \\\n@@ -110,6 +111,7 @@ typedef struct NetClientInfo {\n SetSteeringEBPF *set_steering_ebpf;\n NetCheckPeerType *check_peer_type;\n GetVHostNet *get_vhost_net;\n+ const VMStateDescription *backend_vmsd;\n } NetClientInfo;\n \n struct NetClientState {\n@@ -354,4 +356,6 @@ static inline bool net_peer_needs_padding(NetClientState *nc)\n return nc->peer && !nc->peer->do_not_pad;\n }\n \n+extern const VMStateInfo vmstate_net_peer_backend;\n+\n #endif\ndiff --git a/net/net.c b/net/net.c\nindex a176936f9b..8d09754fa0 100644\n--- a/net/net.c\n+++ b/net/net.c\n@@ -58,6 +58,7 @@\n #include \"qapi/string-output-visitor.h\"\n #include \"qapi/qobject-input-visitor.h\"\n #include \"standard-headers/linux/virtio_net.h\"\n+#include \"migration/vmstate.h\"\n \n /* Net bridge is currently not supported for W32. */\n #if !defined(_WIN32)\n@@ -2173,3 +2174,49 @@ int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size)\n assert(size == 0);\n return 0;\n }\n+\n+static int get_peer_backend(QEMUFile *f, void *pv, size_t size,\n+ const VMStateField *field)\n+{\n+ NetClientState *nc = pv;\n+ Error *local_err = NULL;\n+ int ret;\n+\n+ if (!nc->peer) {\n+ return -EINVAL;\n+ }\n+ nc = nc->peer;\n+\n+ ret = vmstate_load_state(f, nc->info->backend_vmsd, nc, 0, &local_err);\n+ if (ret < 0) {\n+ error_report_err(local_err);\n+ }\n+\n+ return ret;\n+}\n+\n+static int put_peer_backend(QEMUFile *f, void *pv, size_t size,\n+ const VMStateField *field, JSONWriter *vmdesc)\n+{\n+ NetClientState *nc = pv;\n+ Error *local_err = NULL;\n+ int ret;\n+\n+ if (!nc->peer) {\n+ return -EINVAL;\n+ }\n+ nc = nc->peer;\n+\n+ ret = vmstate_save_state(f, nc->info->backend_vmsd, nc, 0, &local_err);\n+ if (ret < 0) {\n+ error_report_err(local_err);\n+ }\n+\n+ return ret;\n+}\n+\n+const VMStateInfo vmstate_net_peer_backend = {\n+ .name = \"virtio-net-nic-nc-backend\",\n+ .get = get_peer_backend,\n+ .put = put_peer_backend,\n+};\n","prefixes":["v11","4/8"]}