microsoft / microsoft/WSL

WSL2 seems not support traffic control by `tc qdisc`

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feature kconfig
Dominant language
C++
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Avg merge
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Merged PRs (30d)
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Description

Is your feature request related to a problem? Please describe.
When I run tc qdisc add dev eth0 root netem delay 200ms, there would comes error Error: Specified qdisc not found.
Noticed someone else also have the same problem.

Describe the solution you'd like
If I'm not wrong, the reason is due to related kernel config is not set. A recommended config for this feature would be:

CONFIG_NET_SCHED=y
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_CSZ=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_INGRESS=m
CONFIG_NET_QOS=y
CONFIG_NET_ESTIMATOR=y
CONFIG_NET_CLS=y
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_ROUTE=y
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_POLICE=y

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the tc qdisc add dev eth0 root netem delay 200ms command in WSL2 and checking which kernel configuration options are enabled. Compare the configuration with the options listed in the issue and verify that traffic control with netem works after the relevant support is available.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux
Domain
networking, operating-systems
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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