NFSD: Update the NFSv3 WRITE3res 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 859cc6c..0191cbf 100644 (file)
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -132,6 +132,19 @@ encode_fh(__be32 *p, struct svc_fh *fhp)
 }
 
 static bool
+svcxdr_encode_writeverf3(struct xdr_stream *xdr, const __be32 *verf)
+{
+       __be32 *p;
+
+       p = xdr_reserve_space(xdr, NFS3_WRITEVERFSIZE);
+       if (!p)
+               return false;
+       memcpy(p, verf, NFS3_WRITEVERFSIZE);
+
+       return true;
+}
+
+static bool
 svcxdr_decode_filename3(struct xdr_stream *xdr, char **name, unsigned int *len)
 {
        u32 size, i;
@@ -1038,17 +1051,28 @@ nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p)
 int
 nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p)
 {
+       struct xdr_stream *xdr = &rqstp->rq_res_stream;
        struct nfsd3_writeres *resp = rqstp->rq_resp;
 
-       *p++ = resp->status;
-       p = encode_wcc_data(rqstp, p, &resp->fh);
-       if (resp->status == 0) {
-               *p++ = htonl(resp->count);
-               *p++ = htonl(resp->committed);
-               *p++ = resp->verf[0];
-               *p++ = resp->verf[1];
+       if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+               return 0;
+       switch (resp->status) {
+       case nfs_ok:
+               if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
+                       return 0;
+               if (xdr_stream_encode_u32(xdr, resp->count) < 0)
+                       return 0;
+               if (xdr_stream_encode_u32(xdr, resp->committed) < 0)
+                       return 0;
+               if (!svcxdr_encode_writeverf3(xdr, resp->verf))
+                       return 0;
+               break;
+       default:
+               if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
+                       return 0;
        }
-       return xdr_ressize_check(rqstp, p);
+
+       return 1;
 }
 
 /* CREATE, MKDIR, SYMLINK, MKNOD */