From: "zhouyuhao.philozhou" <[email protected]>

When mod a flow table's name with table's prefix name, there
will be no change. Because when check whether the new and old
name are the same, only compare the length of the new name.

Case:
  table 10: "good"
  There will be no change if mod the table's name with "g" "go" "goo".

Signed-off-by: zhouyuhao.philozhou <[email protected]>
---
 ofproto/ofproto.c |  4 +++-
 tests/ofproto.at  | 12 ++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
index 122a06f30..bf7ed91b1 100644
--- a/ofproto/ofproto.c
+++ b/ofproto/ofproto.c
@@ -9293,7 +9293,9 @@ oftable_set_name(struct oftable *table, const char *name, 
int level)
     if (level >= table->name_level) {
         if (name) {
             if (name[0]) {
-                if (!table->name || strncmp(name, table->name, len)) {
+                if (!table->name
+                    || strncmp(name, table->name, len)
+                    || len != strlen(table->name)) {
                     free(table->name);
                     table->name = xmemdup0(name, len);
                 }
diff --git a/tests/ofproto.at b/tests/ofproto.at
index 2889f81fb..b68881a27 100644
--- a/tests/ofproto.at
+++ b/tests/ofproto.at
@@ -2418,6 +2418,18 @@ AT_CHECK([ovs-ofctl -O OpenFlow15 dump-table-features 
br0 |grep '^  table'],
   table 253:
 ])
 
+# Make sure that the new name is old table's name prefix can also take effect.
+AT_CHECK([ovs-ofctl -O OpenFlow13 mod-table br0 3 name:thr])
+AT_CHECK([ovs-ofctl -O OpenFlow15 dump-table-features br0 |grep '^  table'],
+  [0], [dnl
+  table 0 ("zero"):
+  table 1 ("one"): ditto
+  table 2: ditto
+  table 3 ("thr"): ditto
+  tables 4...252: ditto
+  table 253:
+])
+
 # Set some table names via OVSDB.
 AT_CHECK(
   [ovs-vsctl \
-- 
2.39.3 (Apple Git-146)

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