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Re: [Qemu-devel] [PATCH] vhost-user: save features if the char dev is cl
From: |
Adrian Moreno |
Subject: |
Re: [Qemu-devel] [PATCH] vhost-user: save features if the char dev is closed |
Date: |
Wed, 18 Sep 2019 10:40:40 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 |
On 9/17/19 11:40 PM, Michael S. Tsirkin wrote:
> On Tue, Sep 17, 2019 at 09:19:01PM +0200, Adrian Moreno wrote:
>> That way the state can be correctly restored when the device is opened
>> again. This might happen if the backend is restarted.
>>
>> Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1738768
>> Reported-by: Pei Zhang <address@hidden>
>> Fixes: 6ab79a20af3a (do not call vhost_net_cleanup() on running net from
>> char user event)
>> Cc: address@hidden
>> Cc: Michael S. Tsirkin <address@hidden>
>>
>> Signed-off-by: Adrian Moreno <address@hidden>
>> ---
>> net/vhost-user.c | 7 +++++++
>> 1 file changed, 7 insertions(+)
>>
>> diff --git a/net/vhost-user.c b/net/vhost-user.c
>> index 51921de443..acf20cb9e0 100644
>> --- a/net/vhost-user.c
>> +++ b/net/vhost-user.c
>> @@ -235,6 +235,13 @@ static void chr_closed_bh(void *opaque)
>>
>> s = DO_UPCAST(NetVhostUserState, nc, ncs[0]);
>>
>> + if (s->vhost_net) {
>> + uint64_t features = vhost_net_get_acked_features(s->vhost_net);
>> + if (features) {
>> + s->acked_features = features;
>> + }
>
> why does it make sense to check if (features)?
> 0x0 is a valid feature bitmap, isn't it?
You're right. It doesn't.
I'll remove the check.
>
>> + }
>> +
>> qmp_set_link(name, false, &err);
>>
>> qemu_chr_fe_set_handlers(&s->chr, NULL, NULL, net_vhost_user_event,
>> --
>> 2.21.0
Thanks.