From patchwork Fri Sep 15 23:00:34 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 9953959 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 26517601AE for ; Fri, 15 Sep 2017 23:03:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1176929588 for ; Fri, 15 Sep 2017 23:03:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 065182958D; Fri, 15 Sep 2017 23:03:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A5B3F29588 for ; Fri, 15 Sep 2017 23:03:35 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dszbN-0004Ud-F7; Fri, 15 Sep 2017 23:00:49 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dszbL-0004SO-KP for xen-devel@lists.xen.org; Fri, 15 Sep 2017 23:00:47 +0000 Received: from [193.109.254.147] by server-11.bemta-6.messagelabs.com id CB/5E-03616-F9B5CB95; Fri, 15 Sep 2017 23:00:47 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpkkeJIrShJLcpLzFFi42I5NlE2WXde9J5 Igw2H1C2WfFzM4sDocXT3b6YAxijWzLyk/IoE1ozVR5YwF0wUqWi7vpOtgXGPYBcjF4eQwDom ie/3z7N1MXJysAg4SGw5up2li5GDg1EgRuLBD2uQMKNAmMTky0tYQWw2AUOJv082gZWLCEhLX Pt8mRFkDrPAZEaJ1+9+MYMkhAXsJebd7WeBmKkq8bV/JiOIzSvgJrHwyw8mEFtCQE7i5LHJYE M5Bdwlnu+/xAJxUBujxLO9G9gnMPIuYGRYxahRnFpUllqka2ysl1SUmZ5RkpuYmaNraGCml5t aXJyYnpqTmFSsl5yfu4kRGBAMQLCDcef6wEOMkhxMSqK8Vn57IoX4kvJTKjMSizPii0pzUosP McpwcChJ8LpGAeUEi1LTUyvSMnOAoQmTluDgURLhFQJJ8xYXJOYWZ6ZDpE4xGnMc23T5DxNHx 827f5iEWPLy81KlxHlPgJQKgJRmlObBDYLFzCVGWSlhXkag04R4ClKLcjNLUOVfMYpzMCoJ84 qBTOHJzCuB2/cK6BQmoFPOnN4BckpJIkJKqoGR3bxqzcaZX9gvLi440hl9oZHjdcp2szWNC81 rbl6XZT4ze1VrUnXhT44pjIVHzWOavt6UrfLQEdLevkHp3jm721pH+eZukWh2UFjGGqz7d0nR r6ZNDtaF4r5v777mK1511dpDZs/2CwKnE7y6849PdK5sb7iUabPM5KrAPhYHHfbIhYtStvgos RRnJBpqMRcVJwIAJ/JGG5QCAAA= X-Env-Sender: sstabellini@kernel.org X-Msg-Ref: server-3.tower-27.messagelabs.com!1505516445!116729824!1 X-Originating-IP: [198.145.29.99] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 9.4.45; banners=-,-,- X-VirusChecked: Checked Received: (qmail 65179 invoked from network); 15 Sep 2017 23:00:46 -0000 Received: from mail.kernel.org (HELO mail.kernel.org) (198.145.29.99) by server-3.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 15 Sep 2017 23:00:46 -0000 Received: from localhost.localdomain (162-198-228-33.lightspeed.wlfrct.sbcglobal.net [162.198.228.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E39C222A7C; Fri, 15 Sep 2017 23:00:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E39C222A7C From: Stefano Stabellini To: xen-devel@lists.xen.org Date: Fri, 15 Sep 2017 16:00:34 -0700 Message-Id: <1505516440-11111-7-git-send-email-sstabellini@kernel.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1505516440-11111-1-git-send-email-sstabellini@kernel.org> References: <1505516440-11111-1-git-send-email-sstabellini@kernel.org> Cc: jgross@suse.com, Stefano Stabellini , boris.ostrovsky@oracle.com, sstabellini@kernel.org, linux-kernel@vger.kernel.org Subject: [Xen-devel] [PATCH v4 07/13] xen/pvcalls: implement listen command X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP Send PVCALLS_LISTEN to the backend. Signed-off-by: Stefano Stabellini Reviewed-by: Boris Ostrovsky CC: boris.ostrovsky@oracle.com CC: jgross@suse.com --- drivers/xen/pvcalls-front.c | 56 +++++++++++++++++++++++++++++++++++++++++++++ drivers/xen/pvcalls-front.h | 1 + 2 files changed, 57 insertions(+) diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c index 50b6588..4ecc1e5 100644 --- a/drivers/xen/pvcalls-front.c +++ b/drivers/xen/pvcalls-front.c @@ -414,6 +414,62 @@ int pvcalls_front_bind(struct socket *sock, struct sockaddr *addr, int addr_len) return 0; } +int pvcalls_front_listen(struct socket *sock, int backlog) +{ + struct pvcalls_bedata *bedata; + struct sock_mapping *map; + struct xen_pvcalls_request *req; + int notify, req_id, ret; + + pvcalls_enter; + if (!pvcalls_front_dev) { + pvcalls_exit; + return -ENOTCONN; + } + bedata = dev_get_drvdata(&pvcalls_front_dev->dev); + + map = (struct sock_mapping *) sock->sk->sk_send_head; + if (!map) { + pvcalls_exit; + return -ENOTSOCK; + } + + if (map->passive.status != PVCALLS_STATUS_BIND) { + pvcalls_exit; + return -EOPNOTSUPP; + } + + spin_lock(&bedata->socket_lock); + ret = get_request(bedata, &req_id); + if (ret < 0) { + spin_unlock(&bedata->socket_lock); + pvcalls_exit; + return ret; + } + req = RING_GET_REQUEST(&bedata->ring, req_id); + req->req_id = req_id; + req->cmd = PVCALLS_LISTEN; + req->u.listen.id = (uint64_t) map; + req->u.listen.backlog = backlog; + + bedata->ring.req_prod_pvt++; + RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&bedata->ring, notify); + spin_unlock(&bedata->socket_lock); + if (notify) + notify_remote_via_irq(bedata->irq); + + wait_event(bedata->inflight_req, + READ_ONCE(bedata->rsp[req_id].req_id) == req_id); + + map->passive.status = PVCALLS_STATUS_LISTEN; + ret = bedata->rsp[req_id].ret; + /* read ret, then set this rsp slot to be reused */ + smp_mb(); + WRITE_ONCE(bedata->rsp[req_id].req_id, PVCALLS_INVALID_ID); + pvcalls_exit; + return ret; +} + static const struct xenbus_device_id pvcalls_front_ids[] = { { "pvcalls" }, { "" } diff --git a/drivers/xen/pvcalls-front.h b/drivers/xen/pvcalls-front.h index 8b0a274..aa8fe10 100644 --- a/drivers/xen/pvcalls-front.h +++ b/drivers/xen/pvcalls-front.h @@ -9,5 +9,6 @@ int pvcalls_front_connect(struct socket *sock, struct sockaddr *addr, int pvcalls_front_bind(struct socket *sock, struct sockaddr *addr, int addr_len); +int pvcalls_front_listen(struct socket *sock, int backlog); #endif