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@pkit pkit commented Dec 10, 2025

Fixes #12319

This patch only supports various IP_MTU_DISCOVER flags.
To fully support tracepath actually tracing the path the correct propagation of TTL exceeded is needed.

@ayushr2 ayushr2 requested a review from milantracy December 10, 2025 09:27
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@pkit thanks!

copybara-service bot pushed a commit that referenced this pull request Dec 15, 2025
Fixes #12319

This patch only supports various IP_MTU_DISCOVER flags.
To fully support `tracepath` actually tracing the path the correct propagation of TTL exceeded is needed.

FUTURE_COPYBARA_INTEGRATE_REVIEW=#12366 from pkit:pmtu_probe_support 5ca5162
PiperOrigin-RevId: 844523992
copybara-service bot pushed a commit that referenced this pull request Dec 15, 2025
Fixes #12319

This patch only supports various IP_MTU_DISCOVER flags.
To fully support `tracepath` actually tracing the path the correct propagation of TTL exceeded is needed.

FUTURE_COPYBARA_INTEGRATE_REVIEW=#12366 from pkit:pmtu_probe_support 5ca5162
PiperOrigin-RevId: 844587171
copybara-service bot pushed a commit that referenced this pull request Dec 15, 2025
Fixes #12319

This patch only supports various IP_MTU_DISCOVER flags.
To fully support `tracepath` actually tracing the path the correct propagation of TTL exceeded is needed.

FUTURE_COPYBARA_INTEGRATE_REVIEW=#12366 from pkit:pmtu_probe_support 5ca5162
PiperOrigin-RevId: 844591169
copybara-service bot pushed a commit that referenced this pull request Dec 15, 2025
Fixes #12319

This patch only supports various IP_MTU_DISCOVER flags.
To fully support `tracepath` actually tracing the path the correct propagation of TTL exceeded is needed.

FUTURE_COPYBARA_INTEGRATE_REVIEW=#12366 from pkit:pmtu_probe_support 5ca5162
PiperOrigin-RevId: 844591169
copybara-service bot pushed a commit that referenced this pull request Dec 15, 2025
Fixes #12319

This patch only supports various IP_MTU_DISCOVER flags.
To fully support `tracepath` actually tracing the path the correct propagation of TTL exceeded is needed.

FUTURE_COPYBARA_INTEGRATE_REVIEW=#12366 from pkit:pmtu_probe_support 5ca5162
PiperOrigin-RevId: 844591169
copybara-service bot pushed a commit that referenced this pull request Dec 15, 2025
Fixes #12319

This patch only supports various IP_MTU_DISCOVER flags.
To fully support `tracepath` actually tracing the path the correct propagation of TTL exceeded is needed.

FUTURE_COPYBARA_INTEGRATE_REVIEW=#12366 from pkit:pmtu_probe_support 5ca5162
PiperOrigin-RevId: 844591169
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@milantracy milantracy left a comment

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we just realize that you will need to update the test cases at
https://github.com/google/gvisor/blob/master/test/syscalls/linux/tcp_socket.cc#L2360-L2373

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pkit commented Dec 15, 2025

@milantracy cool! I will.

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support IP_MTU_DISCOVER

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