{"id":1658300,"url":"http://patchwork.ozlabs.org/api/patches/1658300/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-um/patch/20220720030436.79520-22-xuanzhuo@linux.alibaba.com/","project":{"id":60,"url":"http://patchwork.ozlabs.org/api/projects/60/?format=json","name":"User-mode Linux Development","link_name":"linux-um","list_id":"linux-um.lists.infradead.org","list_email":"linux-um@lists.infradead.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20220720030436.79520-22-xuanzhuo@linux.alibaba.com>","list_archive_url":null,"date":"2022-07-20T03:04:17","name":"[v12,21/40] virtio_ring: packed: introduce virtqueue_resize_packed()","commit_ref":null,"pull_url":null,"state":"not-applicable","archived":false,"hash":"b37cbbeac8c88900cb5173250dc53e2fb4f315a5","submitter":{"id":80519,"url":"http://patchwork.ozlabs.org/api/people/80519/?format=json","name":"Xuan Zhuo","email":"xuanzhuo@linux.alibaba.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-um/patch/20220720030436.79520-22-xuanzhuo@linux.alibaba.com/mbox/","series":[{"id":310331,"url":"http://patchwork.ozlabs.org/api/series/310331/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-um/list/?series=310331","date":"2022-07-20T03:03:59","name":"virtio pci support VIRTIO_F_RING_RESET","version":12,"mbox":"http://patchwork.ozlabs.org/series/310331/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/1658300/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/1658300/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["bilbo.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=lists.infradead.org header.i=@lists.infradead.org\n header.a=rsa-sha256 header.s=bombadil.20210309 header.b=lEWUYPWE;\n\tdkim-atps=neutral","ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=lists.infradead.org\n (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org;\n envelope-from=linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org;\n receiver=)"],"Received":["from bombadil.infradead.org (bombadil.infradead.org\n [IPv6:2607:7c80:54:3::133])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n\t(No client certificate requested)\n\tby bilbo.ozlabs.org (Postfix) with ESMTPS id 4LngZ13XcLz9s2R\n\tfor ; Wed, 20 Jul 2022 13:05:45 +1000 (AEST)","from localhost ([::1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux))\n\tid 1oE01r-00HEzx-Gc; Wed, 20 Jul 2022 03:05:39 +0000","from out30-133.freemail.mail.aliyun.com ([115.124.30.133])\n\tby bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux))\n\tid 1oE01o-00HEsy-2T\n\tfor linux-um@lists.infradead.org; Wed, 20 Jul 2022 03:05:37 +0000","from localhost(mailfrom:xuanzhuo@linux.alibaba.com\n fp:SMTPD_---0VJux97M_1658286326)\n by smtp.aliyun-inc.com;\n Wed, 20 Jul 2022 11:05:28 +0800"],"DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20210309; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post:\n\tList-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:\n\tMessage-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tList-Owner; bh=JlPHx48gPhdqvKMFfped+qXm9k5HxlkSEC2XNRO1b6U=; b=lEWUYPWEpG/iUq\n\tW4sB0OHeC+XXkt2zXW78Aug0wL7TY+MESOOIP7Qng98UMHOJ66CNPGwhf7nOCueqQ/tTQd9fh65FY\n\tA13CgKCYW7i0HMF7ayLGdDxjosGFGzRdHfrhFCU0uhVC8qiLl2LqUixeW9KQk3cNP0lppN/g6xvS+\n\tNUZV9waGGmMheP72ZXW1qXoefW6BG0MIjpAcdbYxgNjCDaMPc+ywaY60C7LvXGpdydN0Q7wAcQnLt\n\tS6ZWqs13XTzBAr/yyDT665f4YMBZymgmAUTIUd86aw4pI/KdSlfDnEjvt3Buij/8onO82Z21bE4yr\n\thALXR66M+aDbO0RH93rw==;","X-Alimail-AntiSpam":"\n AC=PASS;BC=-1|-1;BR=01201311R461e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046060;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=37;SR=0;TI=SMTPD_---0VJux97M_1658286326;","From":"Xuan Zhuo ","To":"virtualization@lists.linux-foundation.org","Cc":"Richard Weinberger ,\n\tAnton Ivanov ,\n\tJohannes Berg ,\n\t\"Michael S. Tsirkin\" ,\n\tJason Wang ,\n\t\"David S. Miller\" ,\n\tEric Dumazet ,\n\tJakub Kicinski ,\n\tPaolo Abeni ,\n\tHans de Goede ,\n\tMark Gross ,\n\tVadim Pasternak ,\n\tBjorn Andersson ,\n\tMathieu Poirier ,\n\tCornelia Huck ,\n\tHalil Pasic ,\n\tEric Farman ,\n\tHeiko Carstens ,\n\tVasily Gorbik ,\n\tAlexander Gordeev ,\n\tChristian Borntraeger ,\n\tSven Schnelle ,\n\tAlexei Starovoitov ,\n\tDaniel Borkmann ,\n\tJesper Dangaard Brouer ,\n\tJohn Fastabend ,\n\tXuan Zhuo ,\n\tVincent Whitchurch ,\n\tlinux-um@lists.infradead.org,\n\tnetdev@vger.kernel.org,\n\tplatform-driver-x86@vger.kernel.org,\n\tlinux-remoteproc@vger.kernel.org,\n\tlinux-s390@vger.kernel.org,\n\tkvm@vger.kernel.org,\n\tbpf@vger.kernel.org,\n\tkangjie.xu@linux.alibaba.com","Subject":"[PATCH v12 21/40] virtio_ring: packed: introduce\n virtqueue_resize_packed()","Date":"Wed, 20 Jul 2022 11:04:17 +0800","Message-Id":"<20220720030436.79520-22-xuanzhuo@linux.alibaba.com>","X-Mailer":"git-send-email 2.31.0","In-Reply-To":"<20220720030436.79520-1-xuanzhuo@linux.alibaba.com>","References":"<20220720030436.79520-1-xuanzhuo@linux.alibaba.com>","MIME-Version":"1.0","X-Git-Hash":"366032b2ffac","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20220719_200536_321584_3B869727 ","X-CRM114-Status":"UNSURE ( 8.83 )","X-CRM114-Notice":"Please train this message.","X-Spam-Score":"-8.0 (--------)","X-Spam-Report":"Spam detection software,\n running on the system \"bombadil.infradead.org\",\n has NOT identified this incoming email as spam. The original\n message has been attached to this so you can view it or label\n similar future email. If you have any questions, see\n the administrator of that system for details.\n Content preview: virtio ring packed supports resize. Only after the new\n vring\n is successfully allocated based on the new num,\n we will release the old vring.\n In any case, an error is returned, indicating that the vring still points\n to the old vring.\n Content analysis details: (-8.0 points, 5.0 required)\n pts rule name description\n ---- ----------------------\n --------------------------------------------------\n -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/,\n no trust\n [115.124.30.133 listed in list.dnswl.org]\n -0.0 SPF_PASS SPF: sender matches SPF record\n 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record\n -7.5 USER_IN_DEF_SPF_WL From: address is in the default SPF\n white-list\n -0.5 ENV_AND_HDR_SPF_MATCH Env and Hdr From used in default SPF WL\n Match\n 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay\n lines","X-BeenThere":"linux-um@lists.infradead.org","X-Mailman-Version":"2.1.34","Precedence":"list","List-Id":"","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"\"linux-um\" ","Errors-To":"linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org"},"content":"virtio ring packed supports resize.\n\nOnly after the new vring is successfully allocated based on the new num,\nwe will release the old vring. In any case, an error is returned,\nindicating that the vring still points to the old vring.\n\nIn the case of an error, re-initialize(by virtqueue_reinit_packed()) the\nvirtqueue to ensure that the vring can be used.\n\nSigned-off-by: Xuan Zhuo \nAcked-by: Jason Wang \n---\n drivers/virtio/virtio_ring.c | 29 +++++++++++++++++++++++++++++\n 1 file changed, 29 insertions(+)","diff":"diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c\nindex 5802cd373fd1..b092914e9dcd 100644\n--- a/drivers/virtio/virtio_ring.c\n+++ b/drivers/virtio/virtio_ring.c\n@@ -2045,6 +2045,35 @@ static struct virtqueue *vring_create_virtqueue_packed(\n \treturn NULL;\n }\n \n+static int virtqueue_resize_packed(struct virtqueue *_vq, u32 num)\n+{\n+\tstruct vring_virtqueue_packed vring_packed = {};\n+\tstruct vring_virtqueue *vq = to_vvq(_vq);\n+\tstruct virtio_device *vdev = _vq->vdev;\n+\tint err;\n+\n+\tif (vring_alloc_queue_packed(&vring_packed, vdev, num))\n+\t\tgoto err_ring;\n+\n+\terr = vring_alloc_state_extra_packed(&vring_packed);\n+\tif (err)\n+\t\tgoto err_state_extra;\n+\n+\tvring_free(&vq->vq);\n+\n+\tvirtqueue_init(vq, vring_packed.vring.num);\n+\tvirtqueue_vring_attach_packed(vq, &vring_packed);\n+\tvirtqueue_vring_init_packed(vq);\n+\n+\treturn 0;\n+\n+err_state_extra:\n+\tvring_free_packed(&vring_packed, vdev);\n+err_ring:\n+\tvirtqueue_reinit_packed(vq);\n+\treturn -ENOMEM;\n+}\n+\n \n /*\n * Generic functions and exported symbols.\n","prefixes":["v12","21/40"]}