NFSD: Finish converting the NFSv3 GETACL result encoder

jira LE-1907
Rebuild_History Non-Buildable kernel-rt-5.14.0-284.30.1.rt14.315.el9_2
commit-author Chuck Lever <chuck.lever@oracle.com>
commit 841fd0a

For some reason, the NFSv2 GETACL result encoder was fully converted
to use the new nfs_stream_encode_acl(), but the NFSv3 equivalent was
not similarly converted.

Fixes: 20798df ("NFSD: Update the NFSv3 GETACL result encoder to use struct xdr_stream")
	Reviewed-by: Jeff Layton <jlayton@kernel.org>
	Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
(cherry picked from commit 841fd0a)
	Signed-off-by: Jonathan Maple <jmaple@ciq.com>

Author: PlaidCat

fs/nfsd/nfs3acl.c

@@ -171,11 +171,7 @@ nfs3svc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 {
 	struct nfsd3_getaclres *resp = rqstp->rq_resp;
 	struct dentry *dentry = resp->fh.fh_dentry;
-	struct kvec *head = rqstp->rq_res.head;
 	struct inode *inode;
-	unsigned int base;
-	int n;
-	int w;
 
 	if (!svcxdr_encode_nfsstat3(xdr, resp->status))
 		return false;
@@ -187,26 +183,12 @@ nfs3svc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 		if (xdr_stream_encode_u32(xdr, resp->mask) < 0)
 			return false;
 
-		base = (char *)xdr->p - (char *)head->iov_base;
-
-		rqstp->rq_res.page_len = w = nfsacl_size(
-			(resp->mask & NFS_ACL)   ? resp->acl_access  : NULL,
-			(resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
-		while (w > 0) {
-			if (!*(rqstp->rq_next_page++))
-				return false;
-			w -= PAGE_SIZE;
-		}
-
-		n = nfsacl_encode(&rqstp->rq_res, base, inode,
-				  resp->acl_access,
-				  resp->mask & NFS_ACL, 0);
-		if (n > 0)
-			n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
-					  resp->acl_default,
-					  resp->mask & NFS_DFACL,
-					  NFS_ACL_DEFAULT);
-		if (n <= 0)
+		if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access,
+					   resp->mask & NFS_ACL, 0))
+			return false;
+		if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default,
+					   resp->mask & NFS_DFACL,
+					   NFS_ACL_DEFAULT))
 			return false;
 		break;
 	default: