Re: [PATCH] nfsd: add NFSD_CMD_FILEHANDLE_GET for root filehandle lookup

[Jakub Kicinski]

On Tue, 20 Oct 2026 11:32:16 -0400 Jeff Layton wrote:
> rpc.mountd still fetches export root filehandles via the
> /proc/fs/nfsd/filehandle transaction interface to satisfy v2/3 MNT
> requests.
> 
> Add a netlink equivalent:
> 
> FILEHANDLE_GET takes domain, path and maxsize and replies with the
> composed handle, mirroring write_filehandle() semantics. Include a
> kselftest covering validation and byte-parity with the /proc interface.
> 
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>

Reviewed-by: Jakub Kicinski <kuba@xxxxxxxxxx> # ynl