From: Ilya Maximets <i.maximets@samsung.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>,
dev@dpdk.org, tiwei.bie@intel.com, zhihong.wang@intel.com,
jfreimann@redhat.com, nicknickolaev@gmail.com,
bruce.richardson@intel.com, alejandro.lucero@netronome.com
Cc: dgilbert@redhat.com, stable@dpdk.org
Subject: Re: [dpdk-stable] [PATCH v2 14/17] vhost: add support to postcopy's end request
Date: Tue, 2 Oct 2018 17:18:41 +0300 [thread overview]
Message-ID: <20181002141625eucas1p229ea75e76bb8b48baa7a842fa8603be0~Z0E73oLiy2051120511eucas1p2m@eucas1p2.samsung.com> (raw)
In-Reply-To: <20181002093651.24795-15-maxime.coquelin@redhat.com>
On 02.10.2018 12:36, Maxime Coquelin wrote:
> The master sends this message before stopping handling
> userfaults, so that the backend closes the userfaultfd.
>
> The master waits for the slave to acknowledge the request
> with an empty 64bits payload for synchronization purpose.
>
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
> lib/librte_vhost/vhost_user.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> index b207de6e0..ee7337ac8 100644
> --- a/lib/librte_vhost/vhost_user.c
> +++ b/lib/librte_vhost/vhost_user.c
> @@ -77,6 +77,7 @@ static const char *vhost_message_str[VHOST_USER_MAX] = {
> [VHOST_USER_CRYPTO_CLOSE_SESS] = "VHOST_USER_CRYPTO_CLOSE_SESS",
> [VHOST_USER_POSTCOPY_ADVISE] = "VHOST_USER_POSTCOPY_ADVISE",
> [VHOST_USER_POSTCOPY_LISTEN] = "VHOST_USER_POSTCOPY_LISTEN",
> + [VHOST_USER_POSTCOPY_END] = "VHOST_USER_POSTCOPY_END",
> };
>
> /* The possible results of a message handling function */
> @@ -1640,6 +1641,25 @@ vhost_user_set_postcopy_listen(struct virtio_net **pdev,
> return VH_RESULT_OK;
> }
>
> +static int
> +vhost_user_postcopy_end(struct virtio_net **pdev, struct VhostUserMsg *msg,
> + int main_fd __rte_unused)
> +{
> + struct virtio_net *dev = *pdev;
> +
> + dev->postcopy_listening = 0;
> + if (dev->postcopy_ufd >= 0) {
> + close(dev->postcopy_ufd);
> + dev->postcopy_ufd = -1;
> + }
> +
> + msg->payload.u64 = 0;
> + msg->size = sizeof(msg->payload.u64);
> + msg->fd_num = 0;
> +
> + return 0;
I think, it should return VH_RESULT_REPLY as the reply is
mandatory according to specification. In pair with change
in patch #1 this will not produce double replies.
> +}
> +
> typedef int (*vhost_message_handler_t)(struct virtio_net **pdev,
> struct VhostUserMsg *msg,
> int main_fd);
> @@ -1669,6 +1689,7 @@ static vhost_message_handler_t vhost_message_handlers[VHOST_USER_MAX] = {
> [VHOST_USER_IOTLB_MSG] = vhost_user_iotlb_msg,
> [VHOST_USER_POSTCOPY_ADVISE] = vhost_user_set_postcopy_advise,
> [VHOST_USER_POSTCOPY_LISTEN] = vhost_user_set_postcopy_listen,
> + [VHOST_USER_POSTCOPY_END] = vhost_user_postcopy_end,
> };
>
>
>
next prev parent reply other threads:[~2018-10-02 14:16 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-02 9:36 [dpdk-stable] [PATCH v2 00/17] vhost: add postcopy live-migration support Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 01/17] vhost: fix messages error checks Maxime Coquelin
2018-10-02 14:15 ` Ilya Maximets
2018-10-03 7:50 ` Maxime Coquelin
2018-10-03 7:57 ` Ilya Maximets
2018-10-03 8:02 ` Maxime Coquelin
2018-10-03 8:32 ` Ilya Maximets
2018-10-03 9:07 ` Ilya Maximets
2018-10-03 14:39 ` Maxime Coquelin
2018-10-04 5:42 ` Ilya Maximets
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 02/17] vhost: fix return code of messages requiring replies Maxime Coquelin
2018-10-03 13:26 ` Ilya Maximets
2018-10-03 14:49 ` Maxime Coquelin
2018-10-04 5:49 ` Ilya Maximets
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 03/17] vhost: fix error handling when mem table gets updated Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 04/17] vhost: define postcopy protocol flag Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 05/17] vhost: add number of fds to vhost-user messages and use it Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 06/17] vhost: pass socket fd to message handling callbacks Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 07/17] vhost: enable fds passing when sending vhost-user messages Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 08/17] vhost: add config flag for postcopy feature Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 09/17] vhost: introduce postcopy's advise message Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 10/17] vhost: add support for postcopy's listen message Maxime Coquelin
2018-10-02 14:11 ` Ilya Maximets
2018-10-03 7:46 ` Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 11/17] vhost: register new regions with userfaultfd Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 12/17] vhost: avoid useless VhostUserMemory copy Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 13/17] vhost: send userfault range addresses back to qemu Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 14/17] vhost: add support to postcopy's end request Maxime Coquelin
2018-10-02 14:18 ` Ilya Maximets [this message]
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 15/17] vhost: enable postcopy protocol feature Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 16/17] vhost: add flag to enable postcopy live-migration Maxime Coquelin
2018-10-02 9:36 ` [dpdk-stable] [PATCH v2 17/17] net/vhost: add parameter to enable postcopy support Maxime Coquelin
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