nfsd: allow encoding a filehandle into fattr4 without a svc_fh

The current fattr4 encoder requires a svc_fh in order to encode the
filehandle. This is not available in a CB_NOTIFY callback. Add a new
"fhandle" field to struct nfsd4_fattr_args and copy the filehandle into
there from the svc_fh. CB_NOTIFY will populate it via other means.

A filehandle composed this way may still need a MAC appended on signed
exports, so generalize fh_append_mac() to operate on a bare knfsd_fh
(plus its maximum size and net) rather than a svc_fh.

The FSID attribute shares the same attrmask gate as the filehandle, so
do the same for it: add fsid_source_fh() which takes a bare knfsd_fh and
its svc_export, and have the FSID encoder use args->fhandle and
args->exp. fsid_source() becomes a wrapper for the v2/v3 callers. The
now-unused svc_fh pointer is dropped from struct nfsd4_fattr_args.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260616-dir-deleg-v7-15-6cbc7eac0ade@kernel.org
Signed-off-by: Chuck Lever <cel@kernel.org>

0 files changed, 0 insertions, 0 deletions