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From: Tiwei Bie <tiwei.bie@intel.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: dev@dpdk.org, zhihong.wang@intel.com, jfreimann@redhat.com,
	nicknickolaev@gmail.com, i.maximets@samsung.com,
	bruce.richardson@intel.com, alejandro.lucero@netronome.com,
	dgilbert@redhat.com, stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v4 01/19] vhost: fix messages error checks
Date: Tue, 9 Oct 2018 16:03:34 +0800	[thread overview]
Message-ID: <20181009080333.GA23638@debian> (raw)
In-Reply-To: <20181008152557.14275-2-maxime.coquelin@redhat.com>

On Mon, Oct 08, 2018 at 05:25:39PM +0200, Maxime Coquelin wrote:
> Return of message handling has now changed to an enum that can
> take non-negative value that is not zero in case a reply is
> needed. But the code checking the variable afterwards has not
> been updated, leading to success messages handling being
> treated as errors.
> 
> Fixes: 2f270595c05d ("vhost: rework message handling as a callback array")

Fixline should be:
Fixes: 0bff510b5ea6 ("vhost: unify message handling function signature")

> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> Acked-by: Ilya Maximets <i.maximets@samsung.com>
> ---
>  lib/librte_vhost/vhost_user.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> index 7ef3fb4a4..060b41893 100644
> --- a/lib/librte_vhost/vhost_user.c
> +++ b/lib/librte_vhost/vhost_user.c
> @@ -1783,7 +1783,7 @@ vhost_user_msg_handler(int vid, int fd)
>  	}
>  
>  skip_to_post_handle:
> -	if (!ret && dev->extern_ops.post_msg_handle) {
> +	if (ret != VH_RESULT_ERR && dev->extern_ops.post_msg_handle) {
>  		uint32_t need_reply;
>  
>  		ret = (*dev->extern_ops.post_msg_handle)(
> @@ -1800,10 +1800,10 @@ vhost_user_msg_handler(int vid, int fd)
>  		vhost_user_unlock_all_queue_pairs(dev);
>  
>  	if (msg.flags & VHOST_USER_NEED_REPLY) {
> -		msg.payload.u64 = !!ret;
> +		msg.payload.u64 = ret == VH_RESULT_ERR;
>  		msg.size = sizeof(msg.payload.u64);
>  		send_vhost_reply(fd, &msg);
> -	} else if (ret) {
> +	} else if (ret == VH_RESULT_ERR) {
>  		RTE_LOG(ERR, VHOST_CONFIG,
>  			"vhost message handling failed.\n");
>  		return -1;

We also need to take care of the return value of .pre_msg_handle()
and .post_msg_handle(). Otherwise, errors could be ignored.

> -- 
> 2.17.1
> 

  reply	other threads:[~2018-10-09  8:05 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-08 15:25 [dpdk-dev] [PATCH v4 00/19] vhost: add postcopy live-migration support Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 01/19] vhost: fix messages error checks Maxime Coquelin
2018-10-09  8:03   ` Tiwei Bie [this message]
2018-10-09 12:20     ` Maxime Coquelin
2018-10-09 12:54       ` Tiwei Bie
2018-10-09 17:53         ` Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 02/19] vhost: fix return code of messages requiring replies Maxime Coquelin
2018-10-09  8:05   ` Tiwei Bie
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 03/19] vhost: clarify reply-ack in case a reply was already sent Maxime Coquelin
2018-10-09  8:12   ` Tiwei Bie
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 04/19] vhost: fix payload size of reply Maxime Coquelin
2018-10-09 10:21   ` Tiwei Bie
2018-10-09 10:30     ` Maxime Coquelin
2018-10-09 10:34       ` Maxime Coquelin
2018-10-09 11:02         ` Tiwei Bie
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 05/19] vhost: fix error handling when mem table gets updated Maxime Coquelin
2018-10-09 11:35   ` Tiwei Bie
2018-10-09 11:47     ` Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 06/19] vhost: define postcopy protocol flag Maxime Coquelin
2018-10-09 11:41   ` Tiwei Bie
2018-10-09 11:47     ` Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 07/19] vhost: add number of fds to vhost-user messages and use it Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 08/19] vhost: pass socket fd to message handling callbacks Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 09/19] vhost: enable fds passing when sending vhost-user messages Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 10/19] vhost: add config flag for postcopy feature Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 11/19] vhost: introduce postcopy's advise message Maxime Coquelin
2018-10-08 16:22   ` Ilya Maximets
2018-10-09  7:59     ` Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 12/19] vhost: add support for postcopy's listen message Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 13/19] vhost: register new regions with userfaultfd Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 14/19] vhost: avoid useless VhostUserMemory copy Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 15/19] vhost: send userfault range addresses back to qemu Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 16/19] vhost: add support to postcopy's end request Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 17/19] vhost: enable postcopy protocol feature Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 18/19] vhost: add flag to enable postcopy live-migration Maxime Coquelin
2018-10-08 15:25 ` [dpdk-dev] [PATCH v4 19/19] net/vhost: add parameter to enable postcopy support Maxime Coquelin

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