Re: [REGRESSION] 7.2.4: nfsd sends CB_OFFLOAD with all-zero stateid, async NFSv4.2 COPY never completes

[Fabian Grünbichler]

On October 11, 2026 6:48 pm, Sasha Levin wrote:
>> Since 7.2.4, an NFSv4.2 server-side COPY between two exports of a Linux
>> NFS server never completes, because nfsd sends CB_OFFLOAD with an
>> all-zero stateid.
> 
> Queued the fix for 7.2 and 6.18, thanks.

AFAICT (for 7.2.x) you queued a full pick of

f307b4f7ed17 nfsd: split nfsd4_copy into transient and durable async copy objects

in

0b2963340727 nfsd: split nfsd4_copy into transient and durable async copy objects

despite Jeff stating the following up-thread:

> We should probably just take Lubos' two-line fix as a separate one-off
> patch for stable. Backporting the COPY code refactor is too risky IMO.

Was this intentional, or an accident?

FWIW, the full refactor would include two more patches:

d6edc2a72513efce59eaf85acb204d2ddac71892 nfsd: drop dead COPY-vs-COPYNOTIFY type handling from s2s stateid IDR
80c376183411300b4c99977c66f3f84f64b38676 nfsd: make the copy offload stateid a first-class nfs4_stid

so this is kind of half-way between the discussed options..

Fabian