[PATCH v4 03/11] nfsd: don't request change attr in CB_GETATTR once file is modified

[Jeff Layton]

RFC8881, section 10.4.3 explains that states that once the server
recognizes that the file has been modified on the client, it needn't
request the change attribute.

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/nfsd/nfs4callback.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 0c49e31d4350..f88d4cfe9b38 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -361,13 +361,14 @@ static void
 encode_cb_getattr4args(struct xdr_stream *xdr, struct nfs4_cb_compound_hdr *hdr,
 			struct nfs4_cb_fattr *fattr)
 {
-	struct nfs4_delegation *dp =
-		container_of(fattr, struct nfs4_delegation, dl_cb_fattr);
+	struct nfs4_delegation *dp = container_of(fattr, struct nfs4_delegation, dl_cb_fattr);
 	struct knfsd_fh *fh = &dp->dl_stid.sc_file->fi_fhandle;
+	struct nfs4_cb_fattr *ncf = &dp->dl_cb_fattr;
 	u32 bmap[1];
 
-	bmap[0] = FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE;
-
+	bmap[0] = FATTR4_WORD0_SIZE;
+	if (!ncf->ncf_file_modified)
+		bmap[0] |= FATTR4_WORD0_CHANGE;
 	encode_nfs_cb_opnum4(xdr, OP_CB_GETATTR);
 	encode_nfs_fh4(xdr, fh);
 	encode_bitmap4(xdr, bmap, ARRAY_SIZE(bmap));

-- 
2.46.0