libceph: rename data out field in osd request op

There are fields "indata" and "indata_len" defined the ceph osd
request op structure.  The "in" part is with from the point of view
of the osd server, but is a little confusing here on the client
side.  Change their names to use "request" instead of "in" to
indicate that it defines data provided with the request (as opposed
the data returned in the response).

Rename the local variable in osd_req_encode_op() to match.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index a498d2d..87fcf0b 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -395,9 +395,9 @@
 	op->cls.method_len = size;
 	payload_len += size;
 
-	op->cls.indata = request_data;
+	op->cls.request_data = request_data;
 	BUG_ON(request_data_size > (size_t) U32_MAX);
-	op->cls.indata_len = (u32) request_data_size;
+	op->cls.request_data_len = (u32) request_data_size;
 	payload_len += request_data_size;
 
 	op->cls.argc = 0;	/* currently unused */
@@ -425,7 +425,7 @@
 			      struct ceph_osd_op *dst, unsigned int which)
 {
 	struct ceph_osd_req_op *src;
-	u64 out_data_len = 0;
+	u64 request_data_len = 0;
 	struct ceph_pagelist *pagelist;
 
 	BUG_ON(which >= req->r_num_ops);
@@ -442,7 +442,7 @@
 	case CEPH_OSD_OP_READ:
 	case CEPH_OSD_OP_WRITE:
 		if (src->op == CEPH_OSD_OP_WRITE)
-			out_data_len = src->extent.length;
+			request_data_len = src->extent.length;
 		dst->extent.offset = cpu_to_le64(src->extent.offset);
 		dst->extent.length = cpu_to_le64(src->extent.length);
 		dst->extent.truncate_size =
@@ -457,16 +457,16 @@
 
 		dst->cls.class_len = src->cls.class_len;
 		dst->cls.method_len = src->cls.method_len;
-		dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
+		dst->cls.indata_len = cpu_to_le32(src->cls.request_data_len);
 		ceph_pagelist_append(pagelist, src->cls.class_name,
 				     src->cls.class_len);
 		ceph_pagelist_append(pagelist, src->cls.method_name,
 				     src->cls.method_len);
-		ceph_pagelist_append(pagelist, src->cls.indata,
-				     src->cls.indata_len);
+		ceph_pagelist_append(pagelist, src->cls.request_data,
+				     src->cls.request_data_len);
 
 		ceph_osd_data_pagelist_init(&req->r_data_out, pagelist);
-		out_data_len = pagelist->length;
+		request_data_len = pagelist->length;
 		break;
 	case CEPH_OSD_OP_STARTSYNC:
 		break;
@@ -486,7 +486,7 @@
 	dst->op = cpu_to_le16(src->op);
 	dst->payload_len = cpu_to_le32(src->payload_len);
 
-	return out_data_len;
+	return request_data_len;
 }
 
 /*