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Sender: Chuck Lever <chucklever@gmail.com>
Subject: [PATCH v2 019/118] NFSD: Replace READ* macros in nfsd4_decode_fattr()
From:   Chuck Lever <chuck.lever@oracle.com>
To:     linux-nfs@vger.kernel.org
Date:   Fri, 20 Nov 2020 15:35:27 -0500
Message-ID: <160590452734.1340.16262869614648652550.stgit@klimt.1015granger.net>
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Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfs4xdr.c |   41 +++++++++++++++++++++++------------------
 1 file changed, 23 insertions(+), 18 deletions(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 046fe62bfa29..c7f14f0db432 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -350,17 +350,17 @@ nfsd4_decode_seclabel(struct nfsd4_compoundargs *argp,
 }
 
 static __be32
-nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
-		   struct iattr *iattr, struct nfs4_acl **acl,
-		   struct xdr_netobj *label, int *umask)
+nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
+		    struct iattr *iattr, struct nfs4_acl **acl,
+		    struct xdr_netobj *label, int *umask)
 {
 	unsigned int starting_pos;
 	u32 attrlist4_count;
+	__be32 *p, status;
 
-	DECODE_HEAD;
 	iattr->ia_valid = 0;
-	if ((status = nfsd4_decode_bitmap(argp, bmval)))
-		return status;
+	if (xdr_stream_decode_uint32_array(argp->xdr, bmval, bmlen) < 0)
+		return nfserr_bad_xdr;
 
 	if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
 	    || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
@@ -488,7 +488,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
 	if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
 		return nfserr_bad_xdr;
 
-	DECODE_TAIL;
+	return nfs_ok;
 }
 
 static __be32
@@ -676,9 +676,10 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create
 	if ((status = check_filename(create->cr_name, create->cr_namelen)))
 		return status;
 
-	status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
-				    &create->cr_acl, &create->cr_label,
-				    &create->cr_umask);
+	status = nfsd4_decode_fattr4(argp, create->cr_bmval,
+				    ARRAY_SIZE(create->cr_bmval),
+				    &create->cr_iattr, &create->cr_acl,
+				    &create->cr_label, &create->cr_umask);
 	if (status)
 		goto out;
 
@@ -927,9 +928,10 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
 		switch (open->op_createmode) {
 		case NFS4_CREATE_UNCHECKED:
 		case NFS4_CREATE_GUARDED:
-			status = nfsd4_decode_fattr(argp, open->op_bmval,
-				&open->op_iattr, &open->op_acl, &open->op_label,
-				&open->op_umask);
+			status = nfsd4_decode_fattr4(argp, open->op_bmval,
+						     ARRAY_SIZE(open->op_bmval),
+						     &open->op_iattr, &open->op_acl,
+						     &open->op_label, &open->op_umask);
 			if (status)
 				goto out;
 			break;
@@ -942,9 +944,10 @@ nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
 				goto xdr_error;
 			READ_BUF(NFS4_VERIFIER_SIZE);
 			COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
-			status = nfsd4_decode_fattr(argp, open->op_bmval,
-				&open->op_iattr, &open->op_acl, &open->op_label,
-				&open->op_umask);
+			status = nfsd4_decode_fattr4(argp, open->op_bmval,
+						     ARRAY_SIZE(open->op_bmval),
+						     &open->op_iattr, &open->op_acl,
+						     &open->op_label, &open->op_umask);
 			if (status)
 				goto out;
 			break;
@@ -1180,8 +1183,10 @@ nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *seta
 	status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
 	if (status)
 		return status;
-	return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
-				  &setattr->sa_acl, &setattr->sa_label, NULL);
+	return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
+				   ARRAY_SIZE(setattr->sa_bmval),
+				   &setattr->sa_iattr, &setattr->sa_acl,
+				   &setattr->sa_label, NULL);
 }
 
 static __be32