Adds a locked function to do ipcache delete on metadata match

[Weil0ng]

Fixes potential racing condition introduced in PR #17161.

Suggested-by: Joe Stringer joe@cilium.io
Signed-off-by: Weilong Cui cuiwl@google.com

[joestringer]

Thanks, the fix looks good to me.

I see that you have referenced my handle in the git commit message. I appreciate the acknowledgement there. Unfortunately, this also means that github will notify me any time that this commit shows up in other PRs on github, including backports. In future, you may want to consider instead adding a tag next to the signed-off-by with just the name rather than the github handle, something like:

Reported-by: Joe Stringer <joe@cilium.io> or
Suggested-by: Joe Stringer <joe@cilium.io>

[Weil0ng]

In future, you may want to consider instead adding a tag next to the signed-off-by with just the name rather than the github handle, something like:

Reported-by: Joe Stringer <joe@cilium.io> or Suggested-by: Joe Stringer <joe@cilium.io>

Thanks for letting me know, changed commit msg, will default to this format when acknowledging folks in the future :)

[Weil0ng]

/test

[Weil0ng]

/test

Job 'Cilium-PR-K8s-GKE' failed and has not been observed before, so may be related to your PR:

Click to show.

Test Name

K8sDatapathConfig Encapsulation Check iptables masquerading with random-fully

Failure Output

FAIL: Pods are not ready in time: timed out waiting for pods with filter  to be ready: 4m0s timeout expired

If it is a flake, comment /mlh new-flake Cilium-PR-K8s-GKE so I can create a new GitHub issue to track it.

Job 'Cilium-PR-K8s-1.21-kernel-4.19' hit: #17881 (98.48% similarity)