[dpdk-dev] 答复: [PATCH] kni: Passing task_pid_vnr(current) to get_net_ns_by_pid() in kni_ioctl_create()
Wenfeng Liu
liuwf at arraynetworks.com.cn
Wed Jun 17 07:43:31 CEST 2015
Hi Helin,
Since I don’t have any 2.6.33 machine on hand right now, I tried to compile
this patch on 2.6.32, and it succeed.
I can't verify this modification in docker since it only support Linux
kernel >= 3.10.
Thanks,
liuwf
-----邮件原件-----
发件人: Zhang, Helin [mailto:helin.zhang at intel.com]
发送时间: 2015年6月17日 11:59
收件人: Wenfeng Liu
抄送: dev at dpdk.org
主题: RE: [PATCH] kni: Passing task_pid_vnr(current) to get_net_ns_by_pid()
in kni_ioctl_create()
> -----Original Message-----
> From: Wenfeng Liu [mailto:liuwf at arraynetworks.com.cn]
> Sent: Monday, June 15, 2015 12:08 PM
> To: Zhang, Helin; dev at dpdk.org
> Subject: [PATCH] kni: Passing task_pid_vnr(current) to
> get_net_ns_by_pid() in
> kni_ioctl_create()
>
> In containers like docker, current->pid returns current process's
> global PID instead of its own PID under containers's PID namespace,
> and
> get_net_ns_by_pid() suppose to accept a virtual PID under its own
> namespace, so we should use task_pid_vnr(current) to get current
> process's virtual PID instead of current->pid.
>
> Signed-off-by: Wenfeng Liu <liuwf at arraynetworks.com.cn>
> ---
> lib/librte_eal/linuxapp/kni/kni_misc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c
> b/lib/librte_eal/linuxapp/kni/kni_misc.c
> index 1935d32..18fb677 100644
> --- a/lib/librte_eal/linuxapp/kni/kni_misc.c
> +++ b/lib/librte_eal/linuxapp/kni/kni_misc.c
> @@ -359,7 +359,7 @@ kni_ioctl_create(unsigned int ioctl_num, unsigned
> long
> ioctl_param)
> return -EBUSY;
> }
>
> - net = get_net_ns_by_pid(current->pid);
> + net = get_net_ns_by_pid(task_pid_vnr(current));
Have you tried it on a very old kernel versions? E.g. 2.6.33
Helin
> if (IS_ERR(net)) {
> free_netdev(net_dev);
> return PTR_ERR(net);
> --
> 1.8.3.1
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