[Mellanox] Sentinel file management for sdk techsupport CT dumps on NVIDIA Bluefield DPUs. - #1994
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… feature. This is part of the feature for adding DASH CT dumps to techsupport on NVIDIA Bluefield DPUs in SmartSwitch. All changes are in the platform-specific function config_syncd_nvidia_bluefield(). This new code helps manage the lifetime of the sentinel file, which, when exists, means that the feature is enabled. The sentinel file path is: /var/run/sonic-platform-nvidia-bluefield/sdk-techsupport-ct-dump.enabled At container startup, create the directory for the sentinel file, but also delete the file if it exists. This gives the setting the same lifetime as the SDN application. Signed-off-by: Judson Wilson <judsonw@nvidia.com>
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croos12
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Jul 15, 2026
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Why I did it
SDK techsupport CT dumps on NVIDIA BlueField SmartSwitch DPUs use a sentinel file to signal that the feature is enabled. The file must not persist across syncd container restarts; its lifetime should match the SDN application.
This PR is required for the parent feature PR sonic-net/sonic-utilities#4696
Work item tracking
How I did it
config_syncd_nvidia_bluefield(), create/var/run/sonic-platform-nvidia-bluefield/at container startup.sdk-techsupport-ct-dump.enabledon startup so a stale sentinel is not left after restart.How to verify it
On a BlueField DPU image with the companion
sonic-utilitieschanges:config platform nvidia-bluefield sdk techsupport-ct-dump enabledls /var/run/sonic-platform-nvidia-bluefield/sdk-techsupport-ct-dump.enabledshow techsupportand confirm CT dump output when enabled.Which release branch to backport (provide reason below if selected)
Tested branch (Please provide the tested image version)
Description for the changelog
nvidia-bluefield sentinel file management for sdk techsupport CT dump feature.