On 07/28/2017 05:46 AM, Michael S. Tsirkin wrote:
On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
+ old_prog = rtnl_dereference(tun->xdp_prog);
+ if (old_prog)
+ bpf_prog_put(old_prog);
+ rcu_assign_pointer(tun->xdp_prog, prog);
Is this OK? Could
On 07/28/2017 05:46 AM, Michael S. Tsirkin wrote:
On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
+ old_prog = rtnl_dereference(tun->xdp_prog);
+ if (old_prog)
+ bpf_prog_put(old_prog);
+ rcu_assign_pointer(tun->xdp_prog, prog);
Is this OK? Could
On Fri, Jul 28, 2017 at 11:50:45AM +0800, Jason Wang wrote:
>
>
> On 2017年07月28日 11:46, Michael S. Tsirkin wrote:
> > On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
> > > > > + old_prog = rtnl_dereference(tun->xdp_prog);
> > > > > + if (old_prog)
> > > > > +
On Fri, Jul 28, 2017 at 11:50:45AM +0800, Jason Wang wrote:
>
>
> On 2017年07月28日 11:46, Michael S. Tsirkin wrote:
> > On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
> > > > > + old_prog = rtnl_dereference(tun->xdp_prog);
> > > > > + if (old_prog)
> > > > > +
On Fri, 28 Jul 2017 06:46:40 +0300, Michael S. Tsirkin wrote:
> On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
> > > > + old_prog = rtnl_dereference(tun->xdp_prog);
> > > > + if (old_prog)
> > > > + bpf_prog_put(old_prog);
> > > > +
On Fri, 28 Jul 2017 06:46:40 +0300, Michael S. Tsirkin wrote:
> On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
> > > > + old_prog = rtnl_dereference(tun->xdp_prog);
> > > > + if (old_prog)
> > > > + bpf_prog_put(old_prog);
> > > > +
On 2017年07月28日 11:46, Michael S. Tsirkin wrote:
On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
+ old_prog = rtnl_dereference(tun->xdp_prog);
+ if (old_prog)
+ bpf_prog_put(old_prog);
+ rcu_assign_pointer(tun->xdp_prog, prog);
Is this OK? Could
On 2017年07月28日 11:46, Michael S. Tsirkin wrote:
On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
+ old_prog = rtnl_dereference(tun->xdp_prog);
+ if (old_prog)
+ bpf_prog_put(old_prog);
+ rcu_assign_pointer(tun->xdp_prog, prog);
Is this OK? Could
On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
> > > + old_prog = rtnl_dereference(tun->xdp_prog);
> > > + if (old_prog)
> > > + bpf_prog_put(old_prog);
> > > + rcu_assign_pointer(tun->xdp_prog, prog);
> > Is this OK? Could this lead to the program getting freed and then
> >
On Fri, Jul 28, 2017 at 11:28:54AM +0800, Jason Wang wrote:
> > > + old_prog = rtnl_dereference(tun->xdp_prog);
> > > + if (old_prog)
> > > + bpf_prog_put(old_prog);
> > > + rcu_assign_pointer(tun->xdp_prog, prog);
> > Is this OK? Could this lead to the program getting freed and then
> >
On 2017年07月28日 11:13, Jakub Kicinski wrote:
On Thu, 27 Jul 2017 17:25:33 +0800, Jason Wang wrote:
This patch tries to implement XDP for tun. The implementation was
split into two parts:
- fast path: small and no gso packet. We try to do XDP at page level
before build_skb(). For XDP_TX,
On 2017年07月28日 11:13, Jakub Kicinski wrote:
On Thu, 27 Jul 2017 17:25:33 +0800, Jason Wang wrote:
This patch tries to implement XDP for tun. The implementation was
split into two parts:
- fast path: small and no gso packet. We try to do XDP at page level
before build_skb(). For XDP_TX,
On Thu, 27 Jul 2017 17:25:33 +0800, Jason Wang wrote:
> This patch tries to implement XDP for tun. The implementation was
> split into two parts:
>
> - fast path: small and no gso packet. We try to do XDP at page level
> before build_skb(). For XDP_TX, since creating/destroying queues
> were
On Thu, 27 Jul 2017 17:25:33 +0800, Jason Wang wrote:
> This patch tries to implement XDP for tun. The implementation was
> split into two parts:
>
> - fast path: small and no gso packet. We try to do XDP at page level
> before build_skb(). For XDP_TX, since creating/destroying queues
> were
This patch tries to implement XDP for tun. The implementation was
split into two parts:
- fast path: small and no gso packet. We try to do XDP at page level
before build_skb(). For XDP_TX, since creating/destroying queues
were completely under control of userspace, it was implemented
This patch tries to implement XDP for tun. The implementation was
split into two parts:
- fast path: small and no gso packet. We try to do XDP at page level
before build_skb(). For XDP_TX, since creating/destroying queues
were completely under control of userspace, it was implemented
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