[v1] virtio-net: fixes for mergeable XDP receive path

[PATCH net 0/4] virtio-net: fixes for mergeable XDP receive path

Bui Quang Minh posted 4 patches 3 months, 2 weeks ago

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drivers/net/virtio_net.c | 91 ++++++++++++++++++++++++----------------
1 file changed, 54 insertions(+), 37 deletions(-)

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[PATCH net 0/4] virtio-net: fixes for mergeable XDP receive path

Posted by Bui Quang Minh 3 months, 2 weeks ago

Hi everyone,

This series contains fixes for XDP receive path in virtio-net
- Patch 1: add a missing check for the received data length with our
allocated buffer size in mergeable mode
- Patch 2: remove a redundant truesize check with PAGE_SIZE in mergeable
mode
- Patch 3: add a helper for mergeable received data length check to avoid
repeated code
- Patch 4: fix the flaky drivers/net/ping.py selftest due to frame drop
when the receive buffer is prefilled before XDP is set but is used after
XDP is set. It's because of current restriction that
headroom + frame's length + tailroom < PAGE_SIZE. XDP does not have this
restriction, so we can lift the restriction here and continue processing
the frame.

Thanks,
Quang Minh.

Bui Quang Minh (4):
  virtio-net: ensure the received length does not exceed allocated size
  virtio-net: remove redundant truesize check with PAGE_SIZE
  virtio-net: create a helper to check received mergeable buffer's
    length
  virtio-net: allow more allocated space for mergeable XDP

 drivers/net/virtio_net.c | 91 ++++++++++++++++++++++++----------------
 1 file changed, 54 insertions(+), 37 deletions(-)

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2.43.0