Bug 2230213

Summary: Please enable CONFIG_INET_DIAG_DESTROY kernel option
Product: Red Hat Enterprise Linux 8 Reporter: Martin Schwenke <martin>
Component: kernelAssignee: Andrea Claudi <aclaudi>
kernel sub component: Networking QA Contact: Mingyu Shi <mshi>
Status: MODIFIED --- Docs Contact:
Severity: medium    
Priority: unspecified CC: aclaudi, asn, jiji, kzhang
Version: 8.8Keywords: Triaged
Target Milestone: rc   
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Hardware: All   
OS: Linux   
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Description Martin Schwenke 2023-08-09 01:50:24 UTC 
Description of problem:

The ss command's -K | --kill option can be used to forcibly close sockets.  This is very useful for scripting failover in a high-availability setting.  In particular, it can be used to reset the server end of TCP connections so failback will work if a client reconnects using the same source socket.

Other Linux distributions such as Debian and Ubuntu enable this kernel option.

Version-Release number of selected component (if applicable):

all

How reproducible:

This is wishlist, so always.


Steps to Reproduce:
1. ssh 127.0.0.1
2. Try "ss -tanH --kill  state established src 127.0.0.1:22"

If this worked then it would print the connection(s) that were closed.  Can see connection(s) still exist with above command but without --kill option.

Actual results:

Does not close connection(s) and print details


Expected results:

Closes connection(s) and prints details

Additional info:

Kernel config says

# CONFIG_INET_DIAG_DESTROY is not set

This is the case on RHEL 8 and 9.