Date: Mon, 20 Apr 2026 05:25:01 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 294501] Cannot Mount Jailed Kerberized NFSv4 Server Exports After Upgrade to 15.0 Message-ID: <bug-294501-7501-PYIAiBG6KR@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-294501-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294501 --- Comment #14 from Gleb Smirnoff <glebius@FreeBSD.org> --- Thanks a lot for working on that, Rick! Where was it stuck and where further did you get? Sorry, I recalled my code and I'd probably withdraw my earlier advice on looking at making RB_HEAD rpcnl_clients virtualized :( I should have recalled the code better before making advices. The way I initially designed it is the following. Since generic Netlink is global, a kernel module (e.g. kgss) registers a global clnt_nl. The word "client" is a bit misleading here, as it hints for "ehrm, this should be virtualized". In reality this "client" is more like a "module", it creates linkage between certain class of kernel clients and a certain class of userland helpers. Thus, the vnet context appears only RPC call level. So, all calls and all replies for all vnets are routed through the same clnt_nl client instance. That's why kgss registers itself at gss_load() globally. Then, when kgss actually does a call, it does clnt_nl_call() in a proper vnet context and clnt_nl_call() will broadcast the message only to the helpers in this vnet and go to sleep(9). A kgssd(8) jailed to the same vnet that did clnt_nl_call() shall receive this message. Did you see that in your debugging? When kgssd(8) sends reply on its Netlink socket it is processed again in the same vnet and clnt_nl_reply() shall process it in the correct vnet (see CURVNET_ASSERT() there). Searching through request queue it matches this vnet against request vnet. So, the krpc<->netlink gate is kind of transparent wrt VIMAGE. All you need to do is to call clnt_nl_call in the right vnet. -- You are receiving this mail because: You are the assignee for the bug.home | help
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