trace: add trace configuration parameter

[dpdk.git] / lib / librte_eal / common / eal_common_trace_utils.c

diff --git a/lib/librte_eal/common/eal_common_trace_utils.c b/lib/librte_eal/common/eal_common_trace_utils.c
index 98026b5..7c86a66 100644 (file)
--- a/lib/librte_eal/common/eal_common_trace_utils.c
+++ b/lib/librte_eal/common/eal_common_trace_utils.c
@@ -118,6 +118,65 @@ fail:
        return -rte_errno;
 }
 
+int
+eal_trace_args_save(const char *optarg)
+{
+       struct trace *trace = trace_obj_get();
+       char *trace_args;
+       uint8_t nb_args;
+
+       nb_args = trace->args.nb_args;
+
+       if (nb_args >= TRACE_MAX_ARGS) {
+               trace_err("ignoring trace %s as limit exceeds", optarg);
+               return 0;
+       }
+
+       trace_args = calloc(1, (strlen(optarg) + 1));
+       if (trace_args == NULL) {
+               trace_err("fail to allocate memory for %s", optarg);
+               return -ENOMEM;
+       }
+
+       memcpy(trace_args, optarg, strlen(optarg));
+       trace->args.args[nb_args++] = trace_args;
+       trace->args.nb_args = nb_args;
+       return 0;
+}
+
+void
+eal_trace_args_free(void)
+{
+       struct trace *trace = trace_obj_get();
+       int i;
+
+       for (i = 0; i < trace->args.nb_args; i++) {
+               if (trace->args.args[i]) {
+                       free((void *)trace->args.args[i]);
+                       trace->args.args[i] = NULL;
+               }
+       }
+}
+
+int
+trace_args_apply(const char *arg)
+{
+       char *str;
+
+       str = strdup(arg);
+       if (str == NULL)
+               return -1;
+
+       if (rte_trace_regexp(str, true) < 0) {
+               trace_err("cannot enable trace for %s", str);
+               free(str);
+               return -1;
+       }
+
+       free(str);
+       return 0;
+}
+
 int
 trace_epoch_time_save(void)
 {