trace: add trace mode 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 4fce605..fce8892 100644 (file)
--- a/lib/librte_eal/common/eal_common_trace_utils.c
+++ b/lib/librte_eal/common/eal_common_trace_utils.c
@@ -223,6 +223,46 @@ trace_bufsz_args_apply(void)
                trace->buff_len = 1024 * 1024; /* 1MB */
 }
 
+int
+eal_trace_mode_args_save(const char *optarg)
+{
+       struct trace *trace = trace_obj_get();
+       size_t len = strlen(optarg);
+       unsigned long tmp;
+       char *pattern;
+
+       if (optarg == NULL) {
+               trace_err("no optarg is passed");
+               return -EINVAL;
+       }
+
+       if (len == 0) {
+               trace_err("value is not provided with option");
+               return -EINVAL;
+       }
+
+       pattern = (char *)calloc(1, len + 2);
+       if (pattern == NULL) {
+               trace_err("fail to allocate memory");
+               return -ENOMEM;
+       }
+
+       sprintf(pattern, "%s*", optarg);
+
+       if (fnmatch(pattern, "overwrite", 0) == 0)
+               tmp = RTE_TRACE_MODE_OVERWRITE;
+       else if (fnmatch(pattern, "discard", 0) == 0)
+               tmp = RTE_TRACE_MODE_DISCARD;
+       else {
+               free(pattern);
+               return -EINVAL;
+       }
+
+       trace->mode = tmp;
+       free(pattern);
+       return 0;
+}
+
 int
 eal_trace_dir_args_save(char const *optarg)
 {