Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Subject: [PATCH v1 6/8] NFSD: Simplify starting_len
From:   Chuck Lever <chuck.lever@oracle.com>
To:     linux-nfs@vger.kernel.org
Date:   Fri, 22 Jul 2022 16:09:10 -0400
Message-ID: <165852055039.11198.3834750353256141137.stgit@manet.1015granger.net>
In-Reply-To: <165852051841.11198.2929614302983292322.stgit@manet.1015granger.net>
References: <165852051841.11198.2929614302983292322.stgit@manet.1015granger.net>
User-Agent: StGit/1.5.dev2+g9ce680a5
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Precedence: bulk

Clean-up: Now that nfsd4_encode_readv() does not have to encode the
EOF or rd_length values, it no longer needs to subtract 8 from
@starting_len.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfs4xdr.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 1e59d4ce529f..32f4f48458e6 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3939,7 +3939,7 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
 				 struct file *file, unsigned long maxcount)
 {
 	struct xdr_stream *xdr = resp->xdr;
-	int starting_len = xdr->buf->len - 8;
+	unsigned int starting_len = xdr->buf->len;
 	__be32 nfserr;
 	__be32 tmp;
 	int pad;
@@ -3954,14 +3954,13 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
 	read->rd_length = maxcount;
 	if (nfserr)
 		return nfserr;
-	if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount))
+	if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount))
 		return nfserr_io;
-	xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
+	xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount));
 
 	tmp = xdr_zero;
 	pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
-	write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
-								&tmp, pad);
+	write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &tmp, pad);
 	return 0;
 
 }