[patch iproute2/net-next] tc: don't print error message on miss when parsing control action with default

[Jiri Pirko]

From: Jiri Pirko <j...@mellanox.com>

In case default control action parsing takes place, it is ok to miss.
So don't print error message.

Fixes: e67aba559581 ("tc: actions: add helpers to parse and print control 
actions")
Reported-by: Jiri Benc <jb...@redhat.com>
Signed-off-by: Jiri Pirko <j...@mellanox.com>
---
 tc/tc_util.c | 36 ++++++++++++++++++++++--------------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/tc/tc_util.c b/tc/tc_util.c
index 5a0f96a..3710468 100644
--- a/tc/tc_util.c
+++ b/tc/tc_util.c
@@ -481,18 +481,8 @@ static int action_a2n(char *arg, int *result, bool 
allow_num)
        return 0;
 }
 
-/* Parse action control including possible options.
- *
- * Parameters:
- * @argc_p - pointer to argc to parse
- * @argv_p - pointer to argv to parse
- * @result_p - pointer to output variable
- * @allow_num - whether action may be in numeric format already
- *
- * In error case, returns -1 and does not touch @result_1p. Otherwise returns 
0.
- */
-int parse_action_control(int *argc_p, char ***argv_p,
-                        int *result_p, bool allow_num)
+static int __parse_action_control(int *argc_p, char ***argv_p, int *result_p,
+                                 bool allow_num, bool ignore_a2n_miss)
 {
        int argc = *argc_p;
        char **argv = *argv_p;
@@ -501,7 +491,8 @@ int parse_action_control(int *argc_p, char ***argv_p,
        if (!argc)
                return -1;
        if (action_a2n(*argv, &result, allow_num) == -1) {
-               fprintf(stderr, "Bad action type %s\n", *argv);
+               if (!ignore_a2n_miss)
+                       fprintf(stderr, "Bad action type %s\n", *argv);
                return -1;
        }
        if (result == TC_ACT_GOTO_CHAIN) {
@@ -534,6 +525,23 @@ int parse_action_control(int *argc_p, char ***argv_p,
  * @argv_p - pointer to argv to parse
  * @result_p - pointer to output variable
  * @allow_num - whether action may be in numeric format already
+ *
+ * In error case, returns -1 and does not touch @result_1p. Otherwise returns 
0.
+ */
+int parse_action_control(int *argc_p, char ***argv_p,
+                        int *result_p, bool allow_num)
+{
+       return __parse_action_control(argc_p, argv_p, result_p,
+                                     allow_num, false);
+}
+
+/* Parse action control including possible options.
+ *
+ * Parameters:
+ * @argc_p - pointer to argc to parse
+ * @argv_p - pointer to argv to parse
+ * @result_p - pointer to output variable
+ * @allow_num - whether action may be in numeric format already
  * @default_result - set as a result in case of parsing error
  *
  * In case there is an error during parsing, the default result is used.
@@ -542,7 +550,7 @@ void parse_action_control_dflt(int *argc_p, char ***argv_p,
                               int *result_p, bool allow_num,
                               int default_result)
 {
-       if (parse_action_control(argc_p, argv_p, result_p, allow_num))
+       if (__parse_action_control(argc_p, argv_p, result_p, allow_num, true))
                *result_p = default_result;
 }
 
-- 
2.9.3