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[2003:cf:574a:7200::9a8]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-490ea4b39e9sm213758215e9.0.2026.06.15.07.12.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 07:12:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mihalicyn.com; s=mihalicyn; t=1781532739; x=1782137539; 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=SwI26bAPD++fDBpapjaelr4YYzGf4tn+w+2LSRNSEKk=; b=CbEPFWbOB/eM+tWKsvY+2fmxg8OqjHgYsR5URAbZ2PL9DqgttgzZXyU6j3H7+B5UmP DoaVVr1oQo+Px0XggsMYlWnQN/R1d0FVhbEV1SFXiRR7qGER/drxq4bUB0iwovHgMsDh o1XCobC0zUAuBGvaim8S/n+qi3ZWbeksTJWDA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781532739; x=1782137539; 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=SwI26bAPD++fDBpapjaelr4YYzGf4tn+w+2LSRNSEKk=; b=aOBo/ZEQZnGiAYuukrYFcBBfCZSrlBjGqfbupFhASPTjWWd6UuS2DVZknK1Rqq9W2K mDyaAvf9eNRd+ZAyuttWGAxi3BOXBMw6ufuB+PwGmqZdwq+XnJ+hNA56G4nAHkE4TbTC uO/Mv1Nx+mOnCZX7iMyRhSwjI1qIFHgovJ4mfnXf+MaKQlEM/as2GmUb2b1keezt2OZa 0hXJLq8fgJPrxDusX91hjqYw+U0bTinbl0WchXoy7Sz5k7tCWo4WiNhFucA5qlakbYSG hie/Mh/IjtafIiuLfsKVIu1MU+grYX0Q0PcwUxmMWAxQ07SD963DtWpVjbiBp3XThIoG 7qpA== X-Gm-Message-State: AOJu0Yx4IP+5lhwbRnTucQdH4Qv34fNGbdvBamzy2X4mySRl0rgnebmd rUOGuHZrg3jdkpDoqdCe7hO1HjtHHfa+gJ1llxtlGq8iApsule6DnoJT6SdOv21VqpWk05QADHs hrxhSf3w= X-Gm-Gg: Acq92OFKY5YAaLRoIAaYmYDO88nOtaMATcpfyNXN9uvut6J7YMVk754TdOgttJpS66s J803Lq0TSHbHf4oWFZy1Zb0UyfziX/nZibozbpMQuvuZZWh5dKeXL3q0VGaKOEa4OrCVgOASbp2 KaFPas2GP0be75svtBVP1LgMBiJ+vnK5KjyctgFJbZQ2tW2Md1oFwqWk8MUv1JmJD91zgm16hYy wcDi39ZlpjoUfzKde0DgQrV8aHHYep35JdhZwhLGkxEJtFR1L3gXDzXUfEC+VdkBBKIYkOfYvid PRSVLN32Wxt2PyA+ksV1QZbWRg5vqbctyWHZ2WLK2WKEjxVWrhED4t+4n+ZgHqU8ZD2j2CA9dS7 Gf6q/yNUNGslB23cGyvtAB78kH21xji3H2NYBHtvM/JlflhsXGdrwehwBgZhpGCwm18LqU1tlFn 8+SLxP7pD21nFA1KDKQIGSnVMEUIcyRycZXZuk7Sl5yFq1AJkeA5uqveR8cNpC+rXb+uKAbdtvJ SI= X-Received: by 2002:a05:600c:1f8c:b0:488:d6eb:e63c with SMTP id 5b1f17b1804b1-492200768abmr151599685e9.15.1781532739263; Mon, 15 Jun 2026 07:12:19 -0700 (PDT) From: Alexander Mikhalitsyn To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Alexander Mikhalitsyn , Klaus Jensen , =?UTF-8?q?St=C3=A9phane=20Graber?= , Jesper Devantier , Keith Busch , Alexander Mikhalitsyn Subject: [PATCH v2 1/2] hw/nvme: initialize ns->subsys for n->namespace Date: Mon, 15 Jun 2026 16:12:15 +0200 Message-ID: <20260615141216.162388-2-alexander@mihalicyn.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260615141216.162388-1-alexander@mihalicyn.com> References: <20260615141216.162388-1-alexander@mihalicyn.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=lists1p.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::335; envelope-from=alexander@mihalicyn.com; helo=mail-wm1-x335.google.com 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, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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 @mihalicyn.com) X-ZM-MESSAGEID: 1781532770903158500 Content-Type: text/plain; charset="utf-8" From: Alexander Mikhalitsyn We must properly initialize n->namespace.subsys too. Will be important in the following patches. Signed-off-by: Alexander Mikhalitsyn --- hw/nvme/ctrl.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c index 815f39173c8..391f8260fc2 100644 --- a/hw/nvme/ctrl.c +++ b/hw/nvme/ctrl.c @@ -9331,6 +9331,7 @@ static void nvme_realize(PCIDevice *pci_dev, Error **= errp) ns =3D &n->namespace; ns->params.nsid =3D 1; ns->ctrl =3D n; + ns->subsys =3D n->subsys; =20 if (nvme_ns_setup(ns, errp)) { return; --=20 2.47.3 From nobody Sun Jul 26 13:28:54 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=mihalicyn.com ARC-Seal: i=1; a=rsa-sha256; t=1781532794; cv=none; d=zohomail.com; s=zohoarc; b=V3wjZWOU+DpBs2/DtL895MG5cDsRtusCAzaPdPN5uyzeiZvhRGHFxHs6oKb42AmZMCpO61fJklW0/XF5QMltSVtcsvYLCOYdaePixtnCFKJjfYe2coaoBI0L65C4DYFRJWimw5lKRIop81cvoz5hHW7XkSGX8Jk1ZlqNHct/P0s= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1781532794; 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=Uo0uYCVEevWy1HQgBtgrdJB7a8Pps0WzO7ud5lijTbw=; b=kC2Qz8G0CPt6wyT+LL9roRZEORi3XHKXewBNLPlOWpEpx4tb+F+KMsR367xzrsYN5NyIkG13YuRvVSi9Fc37pLqIAtY8m9I1Zzb5pWtOKZ1hll1noBWBN64GxmIcW8nBa+7Bb0XuJAqgKlRTXcI/y43sokNTMVJ5fVsDrVLe338= 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 lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1781532794149286.48389333009163; Mon, 15 Jun 2026 07:13:14 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wZ83F-0008TF-3E; Mon, 15 Jun 2026 10:12:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wZ835-0008Qf-Tz for qemu-devel@nongnu.org; Mon, 15 Jun 2026 10:12:24 -0400 Received: from mail-wm1-x331.google.com ([2a00:1450:4864:20::331]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1wZ833-0005Fj-Sm for qemu-devel@nongnu.org; Mon, 15 Jun 2026 10:12:23 -0400 Received: by mail-wm1-x331.google.com with SMTP id 5b1f17b1804b1-4921e4dd62dso18721905e9.0 for ; Mon, 15 Jun 2026 07:12:21 -0700 (PDT) Received: from alex-laptop.lan (p200300cf574a720000000000000009a8.dip0.t-ipconnect.de. [2003:cf:574a:7200::9a8]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-490ea4b39e9sm213758215e9.0.2026.06.15.07.12.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 07:12:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mihalicyn.com; s=mihalicyn; t=1781532740; x=1782137540; 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=Uo0uYCVEevWy1HQgBtgrdJB7a8Pps0WzO7ud5lijTbw=; b=L4uHaBe5MP/yVJP12vG/3/Kaquwe90v5P+4XpSHNqkJNpSbGZvEnJHdqh8tuAheQQX 5TKE6BXyJSZVE4VUrA9eI16EQ6rP8io7lkLlAQKHmBfZfTmPfvhbIYQ8dNk4dy3Xb5rn Z3YI8dqqmUo39x620jppgKCokaCg4d0DxvlUI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781532740; x=1782137540; 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=Uo0uYCVEevWy1HQgBtgrdJB7a8Pps0WzO7ud5lijTbw=; b=mt1vJMfmpSzXP2svfckjmPeasSCKHAXaNyoieS0X38dE0SVEI1nT2DA9TK+FUn+OXo 9nOO1VicjQZZcGuEytc6IW5Iof7Wgme9b+K06MJH+hktIi0jmrgjqXJPSmRjNywzYt4x 9T0ZKRuTY9GNPBAuTXI21LAcgbMpBej1hO5JrCtzyEuc67DKHuVulc23g7EHT19HI8d1 8oVLkF601+qbelQvVl5aSW2mq0pGW3WySw5813w/wxAI/N5bA0F9sXwrRRx7oZDLhezh lBVTnwxPHBfG7xKtdViVOHvlekWCNwFI7ji4bj9ZknYG7UIDDxHyFDlHMlWIosr63RiX GSTg== X-Gm-Message-State: AOJu0Yy7XJ9Qisu6GhdEypfL4ZstlFRTQ+0Y24Qh2KakgGIHSaOHXhie wEPxiBvuorl0FzIz+CnYDDK1vhwcRtpFX9xiH4JRCQDcqt4bPirDj3XMeu64bz0W6gYdiNVYl9o EsGxPnDA= X-Gm-Gg: Acq92OHZRBIuok87qafA+4Ek4cV0scA6YIVS0UzIaIL1dyvtcncsOUrzbBRysSVEPkJ ilABjvNJNqrc8LnBQ7tPt6+yTDSpITqVIsjKxbfDrkXZ+XGZjWcsGuE30KAil+HCsutFVED1Kmi /gsyAM2jWZ13wJlkACnPUM6/l7/nIPpgVabuesQyttsv7ElsAeKPXmLuhgfJ7Nfg9MIQGVW8adt 0b5FeiIOZzgDUZGKCWpgM1hQZITuk0V9mqe002BcdCNFVCBkvchM+ze38ti6ZJsTTlKxlQZRlti ro1aJjSb0Q4pVD4wRhMe3PeYF73SXdwyCVsxaPRmYJXvFeZU+HpfEYZMEXwjAgd9xibHTvSSstn Zzt8v5qRgCz0r30P+Gw8JT3na08U3/tqpbrtgVTwSOaztplNTrAlKKp8LudiZDmmsaV6UOXhMR6 lySVpvfalzJ6gRjQ+uz/EQJaRI6K1V3dGt6YnEi5SHYkPM+2quUWWIVKl2yZz9sBbuD8A87DIr7 H0= X-Received: by 2002:a05:600d:6451:20b0:490:e180:2e0 with SMTP id 5b1f17b1804b1-490ec481088mr113019415e9.3.1781532740133; Mon, 15 Jun 2026 07:12:20 -0700 (PDT) From: Alexander Mikhalitsyn To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Alexander Mikhalitsyn , Klaus Jensen , =?UTF-8?q?St=C3=A9phane=20Graber?= , Jesper Devantier , Keith Busch , Alexander Mikhalitsyn Subject: [PATCH v2 2/2] hw/nvme: support online resize Date: Mon, 15 Jun 2026 16:12:16 +0200 Message-ID: <20260615141216.162388-3-alexander@mihalicyn.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260615141216.162388-1-alexander@mihalicyn.com> References: <20260615141216.162388-1-alexander@mihalicyn.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=lists1p.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::331; envelope-from=alexander@mihalicyn.com; helo=mail-wm1-x331.google.com 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, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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 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 @mihalicyn.com) X-ZM-MESSAGEID: 1781532796803158500 Content-Type: text/plain; charset="utf-8" From: Alexander Mikhalitsyn Implement (BlockDevOps *)->resize_cb() for NVMe namespace to enable online resize support. We must handle cases when multiple namespaces are attached to a single controller, or namespace is shared across a few different controllers by iterating over controllers attached to a NvmeSubsystem and properly notify every controller about a size change. Signed-off-by: Alexander Mikhalitsyn --- v2: - check-patch fixes --- hw/nvme/ctrl.c | 9 +++++++ hw/nvme/ns.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++- hw/nvme/nvme.h | 2 ++ 3 files changed, 78 insertions(+), 1 deletion(-) diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c index 391f8260fc2..d329276e127 100644 --- a/hw/nvme/ctrl.c +++ b/hw/nvme/ctrl.c @@ -6898,6 +6898,15 @@ static uint16_t nvme_ns_attachment(NvmeCtrl *n, Nvme= Request *req) return NVME_SUCCESS; } =20 +void nvme_ctrl_notify_ns_resize(NvmeCtrl *ctrl, NvmeNamespace *ns) +{ + if (!test_and_set_bit(ns->params.nsid, ctrl->changed_nsids)) { + nvme_enqueue_event(ctrl, NVME_AER_TYPE_NOTICE, + NVME_AER_INFO_NOTICE_NS_ATTR_CHANGED, + NVME_LOG_CHANGED_NSLIST); + } +} + typedef struct NvmeFormatAIOCB { BlockAIOCB common; BlockAIOCB *aiocb; diff --git a/hw/nvme/ns.c b/hw/nvme/ns.c index b0106eaa5c8..6814fd74898 100644 --- a/hw/nvme/ns.c +++ b/hw/nvme/ns.c @@ -162,6 +162,70 @@ lbaf_found: return 0; } =20 +static void nvme_ns_resize_cb(void *opaque) +{ + NvmeNamespace *ns =3D opaque; + int64_t size; + int cntlid, notified_ctrls; + + size =3D blk_getlength(ns->blkconf.blk); + if (size < 0) { + error_report("can't get size of block device %s: %s", + blk_name(ns->blkconf.blk), strerror(-size)); + return; + } + + ns->size =3D size; + nvme_ns_init_format(ns); + + if (!ns->attached) { + return; + } + + /* + * Okay, the namespace is attached so we need to notify all controllers + * about size change. + * + * Let's just take ns->subsys, iterate over all controllers and find + * to which of them our namespace is attached. + */ + + assert(ns->subsys); + assert(ns->subsys->ctrls); + + notified_ctrls =3D 0; + for (cntlid =3D 0; cntlid < ARRAY_SIZE(ns->subsys->ctrls); cntlid++) { + NvmeCtrl *ctrl; + + /* notified everyone? */ + if (notified_ctrls =3D=3D ns->attached) { + break; + } + + ctrl =3D nvme_subsys_ctrl(ns->subsys, cntlid); + if (!ctrl) { + continue; + } + + for (uint32_t nsid =3D 1; nsid <=3D NVME_MAX_NAMESPACES; nsid++) { + NvmeNamespace *ns_iter =3D ctrl->namespaces[nsid]; + + if (!ns_iter || ns_iter !=3D ns) { + continue; + } + + nvme_ctrl_notify_ns_resize(ctrl, ns); + + notified_ctrls++; + break; + } + } +} + +static const BlockDevOps nvme_ns_block_ops =3D { + .resize_cb =3D nvme_ns_resize_cb, +}; + static int nvme_ns_init_blk(NvmeNamespace *ns, Error **errp) { bool read_only; @@ -171,10 +235,12 @@ static int nvme_ns_init_blk(NvmeNamespace *ns, Error = **errp) } =20 read_only =3D !blk_supports_write_perm(ns->blkconf.blk); - if (!blkconf_apply_backend_options(&ns->blkconf, read_only, false, err= p)) { + if (!blkconf_apply_backend_options(&ns->blkconf, read_only, true, errp= )) { return -1; } =20 + blk_set_dev_ops(ns->blkconf.blk, &nvme_ns_block_ops, ns); + if (ns->blkconf.discard_granularity =3D=3D -1) { ns->blkconf.discard_granularity =3D MAX(ns->blkconf.logical_block_size, MIN_DISCARD_GRANULARITY); diff --git a/hw/nvme/nvme.h b/hw/nvme/nvme.h index 5ef3ebee29e..ac94cc72c0f 100644 --- a/hw/nvme/nvme.h +++ b/hw/nvme/nvme.h @@ -748,4 +748,6 @@ void nvme_atomic_configure_max_write_size(bool dn, uint= 16_t awun, void nvme_ns_atomic_configure_boundary(bool dn, uint16_t nabsn, uint16_t nabspf, NvmeAtomic *atomic= ); =20 +void nvme_ctrl_notify_ns_resize(NvmeCtrl *ctrl, NvmeNamespace *ns); + #endif /* HW_NVME_NVME_H */ --=20 2.47.3