NFSD: Add nfsd4_encode_fattr4_maxfilesize()

Refactor the encoder for FATTR4_MAXFILESIZE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index ce0cfd5..8f1e7f3 100644 (file)
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3151,6 +3151,14 @@ static __be32 nfsd4_encode_fattr4_fs_locations(struct xdr_stream *xdr,
        return nfsd4_encode_fs_locations4(xdr, args->rqstp, args->exp);
 }
 
+static __be32 nfsd4_encode_fattr4_maxfilesize(struct xdr_stream *xdr,
+                                             const struct nfsd4_fattr_args *args)
+{
+       struct super_block *sb = args->exp->ex_path.mnt->mnt_sb;
+
+       return nfsd4_encode_uint64_t(xdr, sb->s_maxbytes);
+}
+
 /*
  * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
  * ourselves.
@@ -3405,10 +3413,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
                        goto out;
        }
        if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
-               p = xdr_reserve_space(xdr, 8);
-               if (!p)
-                       goto out_resource;
-               p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
+               status = nfsd4_encode_fattr4_maxfilesize(xdr, &args);
+               if (status != nfs_ok)
+                       goto out;
        }
        if (bmval0 & FATTR4_WORD0_MAXLINK) {
                p = xdr_reserve_space(xdr, 4);