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.
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.
Thanks everyone for the v3 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: add pci_down/pci_up configuration
virtio_net: XDP support for adjust_head
drivers/net/virtio_net.c | 228 ++++++++++++++++++++++++---------------
drivers/virtio/virtio.c | 14 ++
drivers/virtio/virtio_balloon.c | 4 -
drivers/virtio/virtio_input.c | 4 -
include/linux/virtio.h | 5 -
5 files changed, 152 insertions(+), 103 deletions(-)
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