From patchwork Sat Sep 15 05:20:54 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikolay Nikolaev X-Patchwork-Id: 44754 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id B5AA94D3A; Sat, 15 Sep 2018 07:20:58 +0200 (CEST) Received: from mail-wr1-f67.google.com (mail-wr1-f67.google.com [209.85.221.67]) by dpdk.org (Postfix) with ESMTP id 26C2E4F9B for ; Sat, 15 Sep 2018 07:20:57 +0200 (CEST) Received: by mail-wr1-f67.google.com with SMTP id w11-v6so12386070wrc.5 for ; Fri, 14 Sep 2018 22:20:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:cc:date:message-id:in-reply-to:references :user-agent:mime-version:content-transfer-encoding; bh=Yv236JZO8MBwNudwgeRbvCz9ijAwsid6llq78vrEdfI=; b=M41PSF1384aSFyIeQmnyTLwZhfgtpePKAq68cWu2AmkFanCMs6ev5tCIUW5R/sYKVz QLSXOZrszJch5yrAWAzLJRlcnemgR9a2vh9W5OBogVZB2QdtsO8/J2uoGQFnxyQ4ihMV 4hCh6e3DzllOEJ7U7PjN6f/xwc3HJRaG0T5HGL2joMI1KWQNLmlg/PoLqBS3xF3/0pk5 iHPAY/YmdecJR5nv4GlzGmB5Lg5jc44wq8qIJLMCLfSm+AvU2FAu6hFXi92ucQ5Fwnnc VtSjC1nfmlcT7ZKmUg79iEkpM6KdRmYDjEQow8X4fUyeDT6UbWS5re6UcOX8KAQ1PTIp lQiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:date:message-id:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=Yv236JZO8MBwNudwgeRbvCz9ijAwsid6llq78vrEdfI=; b=V/2y2YZdKPRYHNnHfN3x+IVXQ3hyh4Cnnx03DjOUtkNyfm8vMbvz3TOyzOcVjeMV+0 5WotHn3AKNuxDZiTSjeC2EBtdy/9vqB0YpYPkKm9E3pEffBjkpr8fzX+WsNDquH2u3Zt ie/9RB6ZrRAf7KjeWRvW7n4AdPKkUlwJ8NMaHbIdLFZaD4CkVSQJFu+f3KxtEukcJMNs AY1h3pgKjZ0qQ3ykl6SiHNw1kdXizbi3be1A3xT9sCyP0uaSy26P5a5ek8rL7MvVt/Oy LJl6kHXle4gEQW+L0keGQMbgTw/ttYomqyEWhgjQAZzzi1UGBoGoE2YuMQqJjHbzfbiR mbZA== X-Gm-Message-State: APzg51CzKP1RdUfCCOtypRqY8LkDDvV+hh8MV1AHKIJBG55FyPSOX3bh IxkkHXZpP2sG9bUceRpd0AjY3K133EitbA== X-Google-Smtp-Source: ANB0VdYfa3diLEuEPiT3cjGCuB94gXBUQhE+nPNgtA95F/A5/9tg2IZ9xWKjAmPiIuTFQqKcOjxecw== X-Received: by 2002:a5d:50cf:: with SMTP id f15-v6mr12415525wrt.128.1536988856596; Fri, 14 Sep 2018 22:20:56 -0700 (PDT) Received: from [127.0.1.1] ([82.146.27.14]) by smtp.gmail.com with ESMTPSA id 60-v6sm9827382wre.82.2018.09.14.22.20.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 14 Sep 2018 22:20:56 -0700 (PDT) From: Nikolay Nikolaev To: maxime.coquelin@redhat.com, tiwei.bie@intel.com, zhihong.wang@intel.com Cc: dev@dpdk.org Date: Sat, 15 Sep 2018 08:20:54 +0300 Message-ID: <153698885466.23049.5627861471035122455.stgit@T460> In-Reply-To: <153698873346.23049.10966616323159180622.stgit@T460> References: <153698873346.23049.10966616323159180622.stgit@T460> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v3 5/5] vhost: message handling implemented as a callback array X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Introduce vhost_message_handlers, which maps the message request type to the message handler. Then replace the switch construct with a map and call. Failing vhost_user_set_features is fatal and all processing should stop immediately and propagate the error to the upper layers. Change the code accordingly to reflect that. Signed-off-by: Nikolay Nikolaev --- lib/librte_vhost/vhost_user.c | 161 +++++++++++++++++------------------------ 1 file changed, 66 insertions(+), 95 deletions(-) diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c index 81c0396de..9004e1ac8 100644 --- a/lib/librte_vhost/vhost_user.c +++ b/lib/librte_vhost/vhost_user.c @@ -73,6 +73,8 @@ static const char *vhost_message_str[VHOST_USER_MAX] = { /* The possible results of a message handling function */ enum vh_result { + /* Message handling failed with an unrecoverable error */ + VH_RESULT_FATAL = -2, /* Message handling failed */ VH_RESULT_ERR = -1, /* Message handling successful */ @@ -206,7 +208,7 @@ vhost_user_set_features(struct virtio_net **pdev, VhostUserMsg *msg) RTE_LOG(ERR, VHOST_CONFIG, "(%d) received invalid negotiated features.\n", dev->vid); - return VH_RESULT_ERR; + return VH_RESULT_FATAL; } if (dev->flags & VIRTIO_DEV_RUNNING) { @@ -222,7 +224,7 @@ vhost_user_set_features(struct virtio_net **pdev, VhostUserMsg *msg) RTE_LOG(ERR, VHOST_CONFIG, "(%d) features changed while device is running.\n", dev->vid); - return VH_RESULT_ERR; + return VH_RESULT_FATAL; } if (dev->notify_ops->features_changed) @@ -1477,6 +1479,34 @@ vhost_user_iotlb_msg(struct virtio_net **pdev, VhostUserMsg *msg) return VH_RESULT_OK; } +typedef int (*vhost_message_handler_t)(struct virtio_net **pdev, VhostUserMsg * msg); +static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = { + [VHOST_USER_NONE] = NULL, + [VHOST_USER_GET_FEATURES] = vhost_user_get_features, + [VHOST_USER_SET_FEATURES] = vhost_user_set_features, + [VHOST_USER_SET_OWNER] = vhost_user_set_owner, + [VHOST_USER_RESET_OWNER] = vhost_user_reset_owner, + [VHOST_USER_SET_MEM_TABLE] = vhost_user_set_mem_table, + [VHOST_USER_SET_LOG_BASE] = vhost_user_set_log_base, + [VHOST_USER_SET_LOG_FD] = vhost_user_set_log_fd, + [VHOST_USER_SET_VRING_NUM] = vhost_user_set_vring_num, + [VHOST_USER_SET_VRING_ADDR] = vhost_user_set_vring_addr, + [VHOST_USER_SET_VRING_BASE] = vhost_user_set_vring_base, + [VHOST_USER_GET_VRING_BASE] = vhost_user_get_vring_base, + [VHOST_USER_SET_VRING_KICK] = vhost_user_set_vring_kick, + [VHOST_USER_SET_VRING_CALL] = vhost_user_set_vring_call, + [VHOST_USER_SET_VRING_ERR] = vhost_user_set_vring_err, + [VHOST_USER_GET_PROTOCOL_FEATURES] = vhost_user_get_protocol_features, + [VHOST_USER_SET_PROTOCOL_FEATURES] = vhost_user_set_protocol_features, + [VHOST_USER_GET_QUEUE_NUM] = vhost_user_get_queue_num, + [VHOST_USER_SET_VRING_ENABLE] = vhost_user_set_vring_enable, + [VHOST_USER_SEND_RARP] = vhost_user_send_rarp, + [VHOST_USER_NET_SET_MTU] = vhost_user_net_set_mtu, + [VHOST_USER_SET_SLAVE_REQ_FD] = vhost_user_set_req_fd, + [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg, +}; + + /* return bytes# of read on success or negative val on failure. */ static int read_vhost_message(int sockfd, VhostUserMsg *msg) @@ -1629,6 +1659,7 @@ vhost_user_msg_handler(int vid, int fd) int ret; int unlock_required = 0; uint32_t skip_master = 0; + int request; dev = get_device(vid); if (dev == NULL) @@ -1721,100 +1752,40 @@ vhost_user_msg_handler(int vid, int fd) goto skip_to_post_handle; } - switch (msg.request.master) { - case VHOST_USER_GET_FEATURES: - ret = vhost_user_get_features(&dev, &msg); - send_vhost_reply(fd, &msg); - break; - case VHOST_USER_SET_FEATURES: - ret = vhost_user_set_features(&dev, &msg); - break; - - case VHOST_USER_GET_PROTOCOL_FEATURES: - ret = vhost_user_get_protocol_features(&dev, &msg); - send_vhost_reply(fd, &msg); - break; - case VHOST_USER_SET_PROTOCOL_FEATURES: - ret = vhost_user_set_protocol_features(&dev, &msg); - break; - - case VHOST_USER_SET_OWNER: - ret = vhost_user_set_owner(&dev, &msg); - break; - case VHOST_USER_RESET_OWNER: - ret = vhost_user_reset_owner(&dev, &msg); - break; - - case VHOST_USER_SET_MEM_TABLE: - ret = vhost_user_set_mem_table(&dev, &msg); - break; - - case VHOST_USER_SET_LOG_BASE: - ret = vhost_user_set_log_base(&dev, &msg); - if (ret) - goto skip_to_reply; - /* it needs a reply */ - send_vhost_reply(fd, &msg); - break; - case VHOST_USER_SET_LOG_FD: - ret = vhost_user_set_log_fd(&dev, &msg); - break; - - case VHOST_USER_SET_VRING_NUM: - ret = vhost_user_set_vring_num(&dev, &msg); - break; - case VHOST_USER_SET_VRING_ADDR: - ret = vhost_user_set_vring_addr(&dev, &msg); - break; - case VHOST_USER_SET_VRING_BASE: - ret = vhost_user_set_vring_base(&dev, &msg); - break; - - case VHOST_USER_GET_VRING_BASE: - ret = vhost_user_get_vring_base(&dev, &msg); - if (ret) - goto skip_to_reply; - send_vhost_reply(fd, &msg); - break; - - case VHOST_USER_SET_VRING_KICK: - ret = vhost_user_set_vring_kick(&dev, &msg); - break; - case VHOST_USER_SET_VRING_CALL: - ret = vhost_user_set_vring_call(&dev, &msg); - break; - - case VHOST_USER_SET_VRING_ERR: - ret = vhost_user_set_vring_err(&dev, &msg); - break; - - case VHOST_USER_GET_QUEUE_NUM: - ret = vhost_user_get_queue_num(&dev, &msg); - send_vhost_reply(fd, &msg); - break; - - case VHOST_USER_SET_VRING_ENABLE: - ret = vhost_user_set_vring_enable(&dev, &msg); - break; - case VHOST_USER_SEND_RARP: - ret = vhost_user_send_rarp(&dev, &msg); - break; - - case VHOST_USER_NET_SET_MTU: - ret = vhost_user_net_set_mtu(&dev, &msg); - break; - - case VHOST_USER_SET_SLAVE_REQ_FD: - ret = vhost_user_set_req_fd(&dev, &msg); - break; - - case VHOST_USER_IOTLB_MSG: - ret = vhost_user_iotlb_msg(&dev, &msg); - break; + request = msg.request.master; + if (request > VHOST_USER_NONE && request < VHOST_USER_MAX) { + if (!vhost_message_handlers[request]) + goto skip_to_post_handle; + ret = vhost_message_handlers[request](&dev, &msg); - default: - ret = -1; - break; + switch (ret) { + case VH_RESULT_FATAL: + RTE_LOG(ERR, VHOST_CONFIG, + "Processing %s failed with an unrecoverable error.\n", + vhost_message_str[request]); + /* Propagate the error to the upper layer */ + return -1; + case VH_RESULT_ERR: + RTE_LOG(ERR, VHOST_CONFIG, + "Processing %s failed.\n", + vhost_message_str[request]); + break; + case VH_RESULT_OK: + RTE_LOG(DEBUG, VHOST_CONFIG, + "Processing %s succeeded.\n", + vhost_message_str[request]); + break; + case VH_RESULT_REPLY: + RTE_LOG(INFO, VHOST_CONFIG, + "Processing %s succeeded and needs reply.\n", + vhost_message_str[request]); + send_vhost_reply(fd, &msg); + break; + } + } else { + RTE_LOG(ERR, VHOST_CONFIG, + "Requested invalid message type %d.\n", request); + ret = VH_RESULT_ERR; } skip_to_post_handle: