Feature request: tls metrics from /proc/net/tls_stat

[totallyunknown]

Linux kernel with loaded tls module exposes the following per-namespace statistics (/proc/net/tls_stat):

• TlsCurrTxSw, TlsCurrRxSw - number of TX and RX sessions currently installed where host handles cryptography
• TlsCurrTxDevice, TlsCurrRxDevice - number of TX and RX sessions currently installed where NIC handles cryptography
• TlsTxSw, TlsRxSw - number of TX and RX sessions opened with host cryptography
• TlsTxDevice, TlsRxDevice - number of TX and RX sessions opened with NIC cryptography
• TlsDecryptError - record decryption failed (e.g. due to incorrect authentication tag)
• TlsDeviceRxResync - number of RX resyncs sent to NICs handling cryptography

https://www.kernel.org/doc/html/latest/networking/tls.html#statistics

If this gets accepted, I can provide a PR for this.

[SuperQ]

Seems like a good feature to me. To start, we would want to add parsing of this file to the Prometheus procfs library.

https://github.com/prometheus/procfs

[mossblaser]

Update: The procfs side of this appears to have landed in master: https://github.com/prometheus/procfs/commit/6d8714c62d4165d2352f73816b44cb325eaf4296