From 03cd34939e0f90fab30daf74034de0fbd1af17ec Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Thu, 26 May 2011 09:34:05 -0700
Subject: [PATCH] openflow: Remove 'body' member from struct ofp_stats_msg.

This member does not actually help with anything.
---
 include/openflow/openflow.h |  1 -
 lib/ofp-util.c              | 17 ++++++++---------
 utilities/ovs-ofctl.c       |  5 ++---
 3 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/include/openflow/openflow.h b/include/openflow/openflow.h
index 9213be640..5329f20ac 100644
--- a/include/openflow/openflow.h
+++ b/include/openflow/openflow.h
@@ -738,7 +738,6 @@ struct ofp_stats_msg {
     ovs_be16 type;              /* One of the OFPST_* constants. */
     ovs_be16 flags;             /* Requests: always 0.
                                  * Replies: 0 or OFPSF_REPLY_MORE. */
-    uint8_t body[0];            /* Body of the request. */
 };
 OFP_ASSERT(sizeof(struct ofp_stats_msg) == 12);
 
diff --git a/lib/ofp-util.c b/lib/ofp-util.c
index 2c6afbe01..e96ace941 100644
--- a/lib/ofp-util.c
+++ b/lib/ofp-util.c
@@ -413,7 +413,7 @@ check_nxstats_msg(const struct ofp_header *oh)
     const struct ofp_stats_msg *osm = (const struct ofp_stats_msg *) oh;
     ovs_be32 vendor;
 
-    memcpy(&vendor, osm->body, sizeof vendor);
+    memcpy(&vendor, osm + 1, sizeof vendor);
     if (vendor != htonl(NX_VENDOR_ID)) {
         VLOG_WARN_RL(&bad_ofmsg_rl, "received vendor stats message for "
                      "unknown vendor %"PRIx32, ntohl(vendor));
@@ -1524,15 +1524,14 @@ update_openflow_length(struct ofpbuf *buffer)
 }
 
 /* Creates an ofp_stats_msg with the given 'type' and 'body_len' bytes of space
- * allocated for the 'body' member.  Returns the first byte of the 'body'
- * member. */
+ * allocated following the ofp_stats_msg header. */
 void *
 ofputil_make_stats_request(size_t body_len, uint16_t type,
                            struct ofpbuf **bufferp)
 {
     struct ofp_stats_msg *request;
-    request = make_openflow(offsetof(struct ofp_stats_msg, body)
-                            + body_len, OFPT_STATS_REQUEST, bufferp);
+    request = make_openflow(sizeof *request + body_len, OFPT_STATS_REQUEST,
+                            bufferp);
     request->type = htons(type);
     request->flags = htons(0);
     return request + 1;
@@ -1554,7 +1553,7 @@ ofputil_make_nxstats_request(size_t openflow_len, uint32_t subtype,
     return nsm;
 }
 
-/* Returns the first byte of the body of the ofp_stats_msg in 'oh'. */
+/* Returns the first byte past the ofp_stats_msg header in 'oh'. */
 const void *
 ofputil_stats_body(const struct ofp_header *oh)
 {
@@ -1562,7 +1561,7 @@ ofputil_stats_body(const struct ofp_header *oh)
     return (const struct ofp_stats_msg *) oh + 1;
 }
 
-/* Returns the length of the body of the ofp_stats_msg in 'oh'. */
+/* Returns the number of bytes past the ofp_stats_msg header in 'oh'. */
 size_t
 ofputil_stats_body_len(const struct ofp_header *oh)
 {
@@ -1570,7 +1569,7 @@ ofputil_stats_body_len(const struct ofp_header *oh)
     return ntohs(oh->length) - sizeof(struct ofp_stats_msg);
 }
 
-/* Returns the first byte of the body of the nicira_stats_msg in 'oh'. */
+/* Returns the first byte past the nicira_stats_msg header in 'oh'. */
 const void *
 ofputil_nxstats_body(const struct ofp_header *oh)
 {
@@ -1578,7 +1577,7 @@ ofputil_nxstats_body(const struct ofp_header *oh)
     return ((const struct nicira_stats_msg *) oh) + 1;
 }
 
-/* Returns the length of the body of the nicira_stats_msg in 'oh'. */
+/* Returns the number of bytes past the nicira_stats_msg header in 'oh'. */
 size_t
 ofputil_nxstats_body_len(const struct ofp_header *oh)
 {
diff --git a/utilities/ovs-ofctl.c b/utilities/ovs-ofctl.c
index 751176942..473385d37 100644
--- a/utilities/ovs-ofctl.c
+++ b/utilities/ovs-ofctl.c
@@ -263,11 +263,10 @@ static void *
 alloc_stats_request(size_t body_len, uint16_t type, struct ofpbuf **bufferp)
 {
     struct ofp_stats_msg *rq;
-    rq = make_openflow((offsetof(struct ofp_stats_msg, body)
-                        + body_len), OFPT_STATS_REQUEST, bufferp);
+    rq = make_openflow(sizeof *rq + body_len, OFPT_STATS_REQUEST, bufferp);
     rq->type = htons(type);
     rq->flags = htons(0);
-    return rq->body;
+    return rq + 1;
 }
 
 static void
-- 
2.43.0