Patch "lockd: Update the NLMv1 SHARE results encoder to use struct xdr_stream" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    lockd: Update the NLMv1 SHARE results encoder to use struct xdr_stream

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     lockd-update-the-nlmv1-share-results-encoder-to-use-.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 01ccb013e2f1dc16d8664a240dbdb5fd10fca8bf
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date:   Thu Jun 3 16:52:10 2021 -0400

    lockd: Update the NLMv1 SHARE results encoder to use struct xdr_stream
    
    [ Upstream commit 529ca3a116e8978575fec061a71fa6865a344891 ]
    
    Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
    Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
    Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 4fb6090bc9158..9235e60b17694 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -41,18 +41,6 @@ loff_t_to_s32(loff_t offset)
 	return res;
 }
 
-/*
- * XDR functions for basic NLM types
- */
-static inline __be32 *
-nlm_encode_cookie(__be32 *p, struct nlm_cookie *c)
-{
-	*p++ = htonl(c->len);
-	memcpy(p, c->data, c->len);
-	p+=XDR_QUADLEN(c->len);
-	return p;
-}
-
 /*
  * NLM file handles are defined by specification to be a variable-length
  * XDR opaque no longer than 1024 bytes. However, this implementation
@@ -361,11 +349,16 @@ nlmsvc_encode_res(struct svc_rqst *rqstp, __be32 *p)
 int
 nlmsvc_encode_shareres(struct svc_rqst *rqstp, __be32 *p)
 {
+	struct xdr_stream *xdr = &rqstp->rq_res_stream;
 	struct nlm_res *resp = rqstp->rq_resp;
 
-	if (!(p = nlm_encode_cookie(p, &resp->cookie)))
+	if (!svcxdr_encode_cookie(xdr, &resp->cookie))
 		return 0;
-	*p++ = resp->status;
-	*p++ = xdr_zero;		/* sequence argument */
-	return xdr_ressize_check(rqstp, p);
+	if (!svcxdr_encode_stats(xdr, resp->status))
+		return 0;
+	/* sequence */
+	if (xdr_stream_encode_u32(xdr, 0) < 0)
+		return 0;
+
+	return 1;
 }