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9797d8fae3
Linux 7.0 added the ability to mark socket inodes with xattrs. Let's use that to clearly mark all our Varlink sockets as being varlink related. This is then used to implement a very useful new command "varlinkctl list-sockets" which lists all varlink entrypoint sockets marked this way. By marking not just the entrypoint inodes but also the connection sockets properly, we can one day add an ebpf based "varlinkctl trace" command that watches varlink sockets for traffic. but that's material for a later PR.