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Subject: [PATCH v1 28/42] NFSD: Update the NFSv2 STATFS result encoder to use
 struct xdr_stream
From:   Chuck Lever <chuck.lever@oracle.com>
To:     linux-nfs@vger.kernel.org
Date:   Mon, 01 Mar 2021 10:18:07 -0500
Message-ID: <161461188720.8508.6558067613011265623.stgit@klimt.1015granger.net>
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Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfsxdr.c |   25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index d6d7d07dbb1b..39d296aecd3e 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -592,19 +592,26 @@ nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p)
 int
 nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p)
 {
+	struct xdr_stream *xdr = &rqstp->rq_res_stream;
 	struct nfsd_statfsres *resp = rqstp->rq_resp;
 	struct kstatfs	*stat = &resp->stats;
 
-	*p++ = resp->status;
-	if (resp->status != nfs_ok)
-		return xdr_ressize_check(rqstp, p);
+	if (!svcxdr_encode_stat(xdr, resp->status))
+		return 0;
+	switch (resp->status) {
+	case nfs_ok:
+		p = xdr_reserve_space(xdr, XDR_UNIT * 5);
+		if (!p)
+			return 0;
+		*p++ = cpu_to_be32(NFSSVC_MAXBLKSIZE_V2);
+		*p++ = cpu_to_be32(stat->f_bsize);
+		*p++ = cpu_to_be32(stat->f_blocks);
+		*p++ = cpu_to_be32(stat->f_bfree);
+		*p = cpu_to_be32(stat->f_bavail);
+		break;
+	}
 
-	*p++ = htonl(NFSSVC_MAXBLKSIZE_V2);	/* max transfer size */
-	*p++ = htonl(stat->f_bsize);
-	*p++ = htonl(stat->f_blocks);
-	*p++ = htonl(stat->f_bfree);
-	*p++ = htonl(stat->f_bavail);
-	return xdr_ressize_check(rqstp, p);
+	return 1;
 }
 
 int