[PATCH 5.10 172/770] NFSD: Update the NFSv3 GETACL argument decoder to use struct xdr_stream

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Chuck Lever <chuck.lever@xxxxxxxxxx>

[ Upstream commit 05027eafc266487c6e056d10ab352861df95b5d4 ]

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 fs/nfsd/nfs3acl.c | 11 ++++++-----
 fs/nfsd/nfs3xdr.c | 11 ++++++++++-
 fs/nfsd/xdr3.h    |  1 +
 3 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index 9e1a92fb97712..addb0d7d5500f 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -124,19 +124,20 @@ static __be32 nfsd3_proc_setacl(struct svc_rqst *rqstp)
 /*
  * XDR decode functions
  */
+
 static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
 {
+	struct xdr_stream *xdr = &rqstp->rq_arg_stream;
 	struct nfsd3_getaclargs *args = rqstp->rq_argp;
 
-	p = nfs3svc_decode_fh(p, &args->fh);
-	if (!p)
+	if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+		return 0;
+	if (xdr_stream_decode_u32(xdr, &args->mask) < 0)
 		return 0;
-	args->mask = ntohl(*p); p++;
 
-	return xdr_argsize_check(rqstp, p);
+	return 1;
 }
 
-
 static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
 {
 	struct nfsd3_setaclargs *args = rqstp->rq_argp;
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index a30b418a51160..aa55d0ba2a548 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -53,7 +53,16 @@ svcxdr_decode_nfstime3(struct xdr_stream *xdr, struct timespec64 *timep)
 	return true;
 }
 
-static bool
+/**
+ * svcxdr_decode_nfs_fh3 - Decode an NFSv3 file handle
+ * @xdr: XDR stream positioned at an undecoded NFSv3 FH
+ * @fhp: OUT: filled-in server file handle
+ *
+ * Return values:
+ *  %false: The encoded file handle was not valid
+ *  %true: @fhp has been initialized
+ */
+bool
 svcxdr_decode_nfs_fh3(struct xdr_stream *xdr, struct svc_fh *fhp)
 {
 	__be32 *p;
diff --git a/fs/nfsd/xdr3.h b/fs/nfsd/xdr3.h
index 5afb3ce4f0622..7456aee74f3df 100644
--- a/fs/nfsd/xdr3.h
+++ b/fs/nfsd/xdr3.h
@@ -308,6 +308,7 @@ int nfs3svc_encode_entry_plus(void *, const char *name,
 __be32 *nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p,
 				struct svc_fh *fhp);
 __be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp);
+bool svcxdr_decode_nfs_fh3(struct xdr_stream *xdr, struct svc_fh *fhp);
 
 
 #endif /* _LINUX_NFSD_XDR3_H */
-- 
2.43.0