NFSD: Update the NFSv3 FSINFO3res encoder to use struct xdr_stream

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index e4a569e..514f53a 100644 (file)
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -25,6 +25,15 @@ static const struct svc_fh nfs3svc_null_fh = {
 };
 
 /*
+ * time_delta. {1, 0} means the server is accurate only
+ * to the nearest second.
+ */
+static const struct timespec64 nfs3svc_time_delta = {
+       .tv_sec         = 1,
+       .tv_nsec        = 0,
+};
+
+/*
  * Mapping of S_IF* types to NFS file types
  */
 static const u32 nfs3_ftypes[] = {
@@ -1445,30 +1454,51 @@ nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p)
        return 1;
 }
 
+static bool
+svcxdr_encode_fsinfo3resok(struct xdr_stream *xdr,
+                          const struct nfsd3_fsinfores *resp)
+{
+       __be32 *p;
+
+       p = xdr_reserve_space(xdr, XDR_UNIT * 12);
+       if (!p)
+               return false;
+       *p++ = cpu_to_be32(resp->f_rtmax);
+       *p++ = cpu_to_be32(resp->f_rtpref);
+       *p++ = cpu_to_be32(resp->f_rtmult);
+       *p++ = cpu_to_be32(resp->f_wtmax);
+       *p++ = cpu_to_be32(resp->f_wtpref);
+       *p++ = cpu_to_be32(resp->f_wtmult);
+       *p++ = cpu_to_be32(resp->f_dtpref);
+       p = xdr_encode_hyper(p, resp->f_maxfilesize);
+       p = encode_nfstime3(p, &nfs3svc_time_delta);
+       *p = cpu_to_be32(resp->f_properties);
+
+       return true;
+}
+
 /* FSINFO */
 int
 nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p)
 {
+       struct xdr_stream *xdr = &rqstp->rq_res_stream;
        struct nfsd3_fsinfores *resp = rqstp->rq_resp;
 
-       *p++ = resp->status;
-       *p++ = xdr_zero;        /* no post_op_attr */
-
-       if (resp->status == 0) {
-               *p++ = htonl(resp->f_rtmax);
-               *p++ = htonl(resp->f_rtpref);
-               *p++ = htonl(resp->f_rtmult);
-               *p++ = htonl(resp->f_wtmax);
-               *p++ = htonl(resp->f_wtpref);
-               *p++ = htonl(resp->f_wtmult);
-               *p++ = htonl(resp->f_dtpref);
-               p = xdr_encode_hyper(p, resp->f_maxfilesize);
-               *p++ = xdr_one;
-               *p++ = xdr_zero;
-               *p++ = htonl(resp->f_properties);
+       if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+               return 0;
+       switch (resp->status) {
+       case nfs_ok:
+               if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+                       return 0;
+               if (!svcxdr_encode_fsinfo3resok(xdr, resp))
+                       return 0;
+               break;
+       default:
+               if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+                       return 0;
        }
 
-       return xdr_ressize_check(rqstp, p);
+       return 1;
 }
 
 /* PATHCONF */