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Sender: Chuck Lever <chucklever@gmail.com>
Subject: [PATCH v1 41/42] NFSD: Update the NFSv2 SETACL argument decoder to
 use struct xdr_stream
From:   Chuck Lever <chuck.lever@oracle.com>
To:     linux-nfs@vger.kernel.org
Date:   Tue, 05 Jan 2021 10:33:17 -0500
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Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfs3acl.c |   31 +++++++++++++------------------
 1 file changed, 13 insertions(+), 18 deletions(-)

diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index addb0d7d5500..a568b842e9eb 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -140,28 +140,23 @@ static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
 
 static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
 {
-	struct nfsd3_setaclargs *args = rqstp->rq_argp;
-	struct kvec *head = rqstp->rq_arg.head;
-	unsigned int base;
-	int n;
+	struct xdr_stream *xdr = &rqstp->rq_arg_stream;
+	struct nfsd3_setaclargs *argp = rqstp->rq_argp;
 
-	p = nfs3svc_decode_fh(p, &args->fh);
-	if (!p)
+	if (!svcxdr_decode_nfs_fh3(xdr, &argp->fh))
+		return 0;
+	if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
 		return 0;
-	args->mask = ntohl(*p++);
-	if (args->mask & ~NFS_ACL_MASK ||
-	    !xdr_argsize_check(rqstp, p))
+	if (argp->mask & ~NFS_ACL_MASK)
+		return 0;
+	if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ?
+				   &argp->acl_access : NULL))
+		return 0;
+	if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ?
+				   &argp->acl_default : NULL))
 		return 0;
 
-	base = (char *)p - (char *)head->iov_base;
-	n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
-			  (args->mask & NFS_ACL) ?
-			  &args->acl_access : NULL);
-	if (n > 0)
-		n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
-				  (args->mask & NFS_DFACL) ?
-				  &args->acl_default : NULL);
-	return (n > 0);
+	return 1;
 }
 
 /*