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>

include/linux/ceph/osd_client.h

@@ -91,8 +91,8 @@ struct ceph_osd_req_op {
 		struct {
 			const char *class_name;
 			const char *method_name;
-			const void *indata;
-			u32 indata_len;
+			const void *request_data;
+			u32 request_data_len;
 			__u8 class_len;
 			__u8 method_len;
 			__u8 argc;

net/ceph/osd_client.c

@@ -395,9 +395,9 @@ void osd_req_op_cls_init(struct ceph_osd_req_op *op, u16 opcode,
 	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 @@ static u64 osd_req_encode_op(struct ceph_osd_request *req,
 			      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 @@ static u64 osd_req_encode_op(struct ceph_osd_request *req,
 	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 @@ static u64 osd_req_encode_op(struct ceph_osd_request *req,
 
 		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 @@ static u64 osd_req_encode_op(struct ceph_osd_request *req,
 	dst->op = cpu_to_le16(src->op);
 	dst->payload_len = cpu_to_le32(src->payload_len);
 
-	return out_data_len;
+	return request_data_len;
 }
 
 /*