Differential D48553

gssd: use netlink(4) RPC service to talk to kernel GSS
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Authored by glebius on Jan 20 2025, 9:03 PM.

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rGa8f61691e9e5: gssd: use netlink(4) RPC service to talk to kernel GSS

Summary

Userland counterpart of the previous commit.

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rG FreeBSD src repository

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Buildable 61826
Build 58710: arc lint + arc unit

Event Timeline

glebius created this revision.Jan 20 2025, 9:03 PM

Herald added a subscriber: imp. · View Herald TranscriptJan 20 2025, 9:03 PM

glebius requested review of this revision.Jan 20 2025, 9:03 PM

Harbormaster completed remote builds in B61826: Diff 149600.Jan 20 2025, 9:03 PM

glebius added a parent revision: D48552: kgssapi: use netlink RPC client to talk to gssd(8).Jan 20 2025, 9:03 PM

glebius added a child revision: D48554: kgssapi: remove the gssd_syscall.

I think this looks fine. I cannot exactly remember what
the gssd_syscall("") did (it indicated the daemon was going away),
but I'll assume you no longer need it?

Does the kernel code know that the daemon has gone away so
that it will no longer attempt an upcall?

This revision is now accepted and ready to land.Jan 25 2025, 9:01 PM

In D48553#1110381, @rmacklem wrote:

Does the kernel code know that the daemon has gone away so
that it will no longer attempt an upcall?

Kernel will timeout the call. There is no way to quickly tell if there are any netlink listeners on the userland side. If we want to make a faster reaction of kernel to daemon failure we can play with timeouts algorithm. E.g. after first failure switch to very short timeout, so that we return in 1 second, but still leaving a chance for daemon to come up and then we will switch to a normal mode.

Closed by commit rGa8f61691e9e5: gssd: use netlink(4) RPC service to talk to kernel GSS (authored by glebius). · Explain WhyFeb 1 2025, 9:03 AM

This revision was automatically updated to reflect the committed changes.

glebius added a commit: rGa8f61691e9e5: gssd: use netlink(4) RPC service to talk to kernel GSS.

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usr.sbin/

gssd/

69 lines

Diff 149600

usr.sbin/gssd/gssd.c

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