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Subject: [PATCH 20/29] lockd: Update the NLMv4 CANCEL arguments decoder to use
 struct xdr_stream
From:   Chuck Lever <chuck.lever@oracle.com>
To:     bfields@fieldses.org
Cc:     linux-nfs@vger.kernel.org
Date:   Thu, 03 Jun 2021 16:52:34 -0400
Message-ID: <162275355477.32691.762365878914843352.stgit@klimt.1015granger.net>
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Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/lockd/xdr4.c |   33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 1d3e780c25fd..37d45f1d7199 100644
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -291,30 +291,33 @@ nlm4svc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p)
 }
 
 int
-nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
+nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p)
 {
-	struct nlm_res *resp = rqstp->rq_resp;
+	struct xdr_stream *xdr = &rqstp->rq_arg_stream;
+	struct nlm_args *argp = rqstp->rq_argp;
+	u32 exclusive;
 
-	if (!(p = nlm4_encode_testres(p, resp)))
+	if (!svcxdr_decode_cookie(xdr, &argp->cookie))
 		return 0;
-	return xdr_ressize_check(rqstp, p);
+	if (xdr_stream_decode_bool(xdr, &argp->block) < 0)
+		return 0;
+	if (xdr_stream_decode_bool(xdr, &exclusive) < 0)
+		return 0;
+	if (!svcxdr_decode_lock(xdr, &argp->lock))
+		return 0;
+	if (exclusive)
+		argp->lock.fl.fl_type = F_WRLCK;
+	return 1;
 }
 
 int
-nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p)
+nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
 {
-	struct nlm_args *argp = rqstp->rq_argp;
-	u32	exclusive;
+	struct nlm_res *resp = rqstp->rq_resp;
 
-	if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
-		return 0;
-	argp->block = ntohl(*p++);
-	exclusive = ntohl(*p++);
-	if (!(p = nlm4_decode_lock(p, &argp->lock)))
+	if (!(p = nlm4_encode_testres(p, resp)))
 		return 0;
-	if (exclusive)
-		argp->lock.fl.fl_type = F_WRLCK;
-	return xdr_argsize_check(rqstp, p);
+	return xdr_ressize_check(rqstp, p);
 }
 
 int