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Differential D4131

Fix a checksum offloading bug in Hyper-V netvsc driver
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Authored by honzhan_microsoft.com on Nov 12 2015, 9:45 AM.
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whu
royger
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Contributor Reviewers (ports)
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rS291156: Ignore the inbound checksum flags when doing packet forwarding in netvsc driver.
Summary

In network forwarding test scenario, the checksum should be calculated again if

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rS FreeBSD src repository - subversion
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honzhan_microsoft.com updated this revision to Diff 10125.Nov 12 2015, 9:45 AM
honzhan_microsoft.com retitled this revision from to Fix a checksum offloading bug in Hyper-V netvsc driver.
honzhan_microsoft.com updated this object.
Herald added a reviewer: Contributor Reviewers (ports). · View Herald TranscriptNov 12 2015, 9:45 AM
Herald added a subscriber: imp. · View Herald Transcript
honzhan_microsoft.com added a reviewer: whu.Nov 12 2015, 9:49 AM
honzhan_microsoft.com added a reviewer: royger.

Could you please help me review the bug fix?

whu edited edge metadata.Nov 13 2015, 8:20 AM

This has been tested by several customers who were experiencing packet loss on their 10.2 gateway VMs. The patch fixed their problems. I just have one minor comment to add a little detailed comments in the code.

sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
576 ↗(On Diff #10125)

Can you put a little more detailed comment here, say to only check for out bound flags and ignore the inbound ones?

royger accepted this revision.Nov 13 2015, 9:33 AM
royger edited edge metadata.

LGTM, although I'm no networking expert.

@Wei: feel free to add my approved by and commit it when you feel it's ready.

This revision is now accepted and ready to land.Nov 13 2015, 9:33 AM
honzhan_microsoft.com updated this revision to Diff 10221.Nov 16 2015, 2:55 AM
honzhan_microsoft.com edited edge metadata.

refine the patch according to Wei Hu's comments

This revision now requires review to proceed.Nov 16 2015, 2:55 AM
Closed by commit rS291156: Ignore the inbound checksum flags when doing packet forwarding in netvsc driver. (authored by whu). · Explain WhyNov 22 2015, 5:26 AM
This revision was automatically updated to reflect the committed changes.

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PathSize
head/
sys/
dev/
hyperv/
netvsc/
12 lines

Diff 10417

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head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c

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