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46db3c8a1b
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>