On Tue, Jan 17, 2017 at 02:19:27PM -0800, John Fastabend wrote:
> This has a fix to handle small buffer free logic correctly and then
> also adds adjust head support.
>
> I pushed adjust head at net (even though its rc3) to avoid having
> to push another exception case into virtio_net to catch if the
> program uses adjust_head and then block it. If there are any strong
> objections to this we can push it at net-next and use a patch from
> Jakub to add the exception handling but then user space has to deal
> with it either via try/fail logic or via kernel version checks. Granted
> we already have some cases that need to be configured to enable XDP
> but I don't see any reason to have yet another one when we can fix it
> now vs delaying a kernel version.
1, 3 and 4 definitely look good to me.
I don't like the big hammer approach that other patches
take though. Sent some comments, and I'd like to ponder it for a
couple of days.
>
> v2: fix spelling error, convert unsigned -> unsigned int
> v3: v2 git crashed during send so retrying sorry for the noise
> v4: changed layout of rtnl_lock fixes (Stephen)
> moved reset logic into virtio core with new patch (MST)
> fixed up linearize and some code cleanup (Jason)
>
> Otherwise did some generic code cleanup so might be a bit
> cleaner this time at least that is the hope.
> v5: fixed rtnl_lock issue (DaveM)
>
> In order to fix rtnl_lock issue and also to address Jason's
> comment questioning the need for a generic virtio_device_reset
> routine I exported some virtio core routines and then wrote
> virtio_net reset routine. This is the cleanest solution I
> came up with today and I do not at this time have any need
> for a more generic reset. If folks don't like this I could
> revert back to v3 variant but Stephen pointed out that the
> pattern used there is also not ideal.
>
> Thanks for the review.
>
> ---
>
> John Fastabend (6):
> virtio_net: use dev_kfree_skb for small buffer XDP receive
> virtio_net: wrap rtnl_lock in test for calling with lock already held
> virtio_net: factor out xdp handler for readability
> virtio_net: remove duplicate queue pair binding in XDP
> virtio_net: refactor freeze/restore logic into virtnet reset logic
> virtio_net: XDP support for adjust_head
>
>
> drivers/net/virtio_net.c | 332
> ++
> drivers/virtio/virtio.c | 42 +++---
> include/linux/virtio.h |4 +
> 3 files changed, 247 insertions(+), 131 deletions(-)
>
> --
> Signature
