* tun: need an ioctl() cmd to get multi_queue index?
@ 2024-07-10 9:40 ayaka
2024-07-10 15:18 ` Stephen Hemminger
0 siblings, 1 reply; 3+ messages in thread
From: ayaka @ 2024-07-10 9:40 UTC (permalink / raw)
To: netdev
Hello All
I have read some example that filter packet with tc qdisc. It could a very useful feature for dispatcher in a VPN program.
But I didn’t find an ioctl() to fetch the queue index, which I believe is the queue number used in tc qdisc.
There is an ioctl() which set the ifindex which would affect the queue_index storing in the same union. But I don’t think there is an ioctl() to fetch it.
If I was right, could I add a new ioctl() cmd for that?
Sincerely
Randy
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: tun: need an ioctl() cmd to get multi_queue index?
2024-07-10 9:40 tun: need an ioctl() cmd to get multi_queue index? ayaka
@ 2024-07-10 15:18 ` Stephen Hemminger
2024-07-10 15:23 ` Randy Li
0 siblings, 1 reply; 3+ messages in thread
From: Stephen Hemminger @ 2024-07-10 15:18 UTC (permalink / raw)
To: ayaka; +Cc: netdev
On Wed, 10 Jul 2024 17:40:46 +0800
ayaka <ayaka@soulik.info> wrote:
> Hello All
>
> I have read some example that filter packet with tc qdisc. It could a very useful feature for dispatcher in a VPN program.
> But I didn’t find an ioctl() to fetch the queue index, which I believe is the queue number used in tc qdisc.
> There is an ioctl() which set the ifindex which would affect the queue_index storing in the same union. But I don’t think there is an ioctl() to fetch it.
>
> If I was right, could I add a new ioctl() cmd for that?
>
> Sincerely
> Randy
In the case of TUN, each queue is handled by a different file descriptor.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: tun: need an ioctl() cmd to get multi_queue index?
2024-07-10 15:18 ` Stephen Hemminger
@ 2024-07-10 15:23 ` Randy Li
0 siblings, 0 replies; 3+ messages in thread
From: Randy Li @ 2024-07-10 15:23 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: netdev
Hello Stephen
On 2024/7/10 23:18, Stephen Hemminger wrote:
> On Wed, 10 Jul 2024 17:40:46 +0800
> ayaka <ayaka@soulik.info> wrote:
>
>> Hello All
>>
>> I have read some example that filter packet with tc qdisc. It could a very useful feature for dispatcher in a VPN program.
>> But I didn’t find an ioctl() to fetch the queue index, which I believe is the queue number used in tc qdisc.
>> There is an ioctl() which set the ifindex which would affect the queue_index storing in the same union. But I don’t think there is an ioctl() to fetch it.
>>
>> If I was right, could I add a new ioctl() cmd for that?
>>
>> Sincerely
>> Randy
> In the case of TUN, each queue is handled by a different file descriptor.
Yes, I know of that. But I think the argument that queue_mapping
requires in tc is the index not the file descriptor.
Although I am not sure whether the filter would work as I expected, I
would apply the filter in the reading from tun/tap side, which is the
socket data passes through the tun device.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2024-07-10 9:40 tun: need an ioctl() cmd to get multi_queue index? ayaka
2024-07-10 15:18 ` Stephen Hemminger
2024-07-10 15:23 ` Randy Li
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