nfsd: export NFSv4 callback op stats via netlink

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Add a proc4cb-ops nested attribute to the server-stats netlink dump,
reusing the existing server-proc-entry (op/count) layout. The dump
gains a callback section that emits one entry per callback opcode
(OP_CB_GETATTR..OP_CB_OFFLOAD) from the per-netns callback counters,
paged across messages like the other per-operation sections.

This lets nfsstat report NFSv4 backchannel operation counts over
netlink, including CB_GETATTR which corresponds to the procfs
wdeleg_getattr line.

Assisted-by: LLM
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260717-exportd-netlink-v7-6-b7ce17b83b60@kernel.org
Signed-off-by: Chuck Lever <cel@kernel.org>

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Jeff Layton 2026-07-17 07:08:58 -04:00 • committed by Chuck Lever

parent 1e5f641dfa

commit 46db3c8a1b

3 changed files with 34 additions and 0 deletions

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6

Documentation/netlink/specs/nfsd.yaml

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27

fs/nfsd/nfsctl.c

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1

include/uapi/linux/nfsd_netlink.h

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