From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Tue, 20 Mar 2018 21:03:06 +0000 (-0400)
Subject: SUNRPC: Add a helper for encoding opaque data inline
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=85e3dd44c514a8bed6c713df4af657be83d00f68;p=linux.git

SUNRPC: Add a helper for encoding opaque data inline

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---

diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 7e609de34d857..a43c3b6455b64 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -318,6 +318,31 @@ xdr_stream_encode_u64(struct xdr_stream *xdr, __u64 n)
 	return len;
 }
 
+/**
+ * xdr_stream_encode_opaque_inline - Encode opaque xdr data
+ * @xdr: pointer to xdr_stream
+ * @ptr: pointer to void pointer
+ * @len: size of object
+ *
+ * Return values:
+ *   On success, returns length in bytes of XDR buffer consumed
+ *   %-EMSGSIZE on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_encode_opaque_inline(struct xdr_stream *xdr, void **ptr, size_t len)
+{
+	size_t count = sizeof(__u32) + xdr_align_size(len);
+	__be32 *p = xdr_reserve_space(xdr, count);
+
+	if (unlikely(!p)) {
+		*ptr = NULL;
+		return -EMSGSIZE;
+	}
+	xdr_encode_opaque(p, NULL, len);
+	*ptr = ++p;
+	return count;
+}
+
 /**
  * xdr_stream_encode_opaque_fixed - Encode fixed length opaque xdr data
  * @xdr: pointer to xdr_stream