eal: change several log levels matching a regexp

Introduce a function to set the log level of several log types that
match a regular expression.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>

lib/librte_eal/bsdapp/eal/rte_eal_version.map

@@ -189,5 +189,6 @@ DPDK_17.05 {
 	rte_log_dump;
 	rte_log_register;
 	rte_log_set_level;
+	rte_log_set_level_regexp;
 
 } DPDK_17.02;

lib/librte_eal/common/eal_common_log.c

@@ -37,6 +37,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#include <regex.h>
 
 #include <rte_eal.h>
 #include <rte_log.h>
@@ -132,6 +133,26 @@ rte_log_set_level(uint32_t type, uint32_t level)
 	return 0;
 }
 
+/* set level */
+int
+rte_log_set_level_regexp(const char *pattern, uint32_t level)
+{
+	regex_t r;
+	size_t i;
+
+	if (level > RTE_LOG_DEBUG)
+		return -1;
+
+	for (i = 0; i < rte_logs.dynamic_types_len; i++) {
+		if (rte_logs.dynamic_types[i].name == NULL)
+			continue;
+		if (regexec(&r, pattern, 0, NULL, 0) == 0)
+			rte_logs.dynamic_types[i].loglevel = level;
+	}
+
+	return 0;
+}
+
 /* get the current loglevel for the message beeing processed */
 int rte_log_cur_msg_loglevel(void)
 {

lib/librte_eal/common/include/rte_log.h

@@ -155,6 +155,18 @@ void rte_set_log_type(uint32_t type, int enable);
  */
 uint32_t rte_get_log_type(void);
 
+/**
+ * Set the log level for a given type.
+ *
+ * @param pattern
+ *   The regexp identifying the log type.
+ * @param level
+ *   The level to be set.
+ * @return
+ *   0 on success, a negative value if level is invalid.
+ */
+int rte_log_set_level_regexp(const char *pattern, uint32_t level);
+
 /**
  * Set the log level for a given type.
  *

lib/librte_eal/linuxapp/eal/rte_eal_version.map

@@ -194,5 +194,6 @@ DPDK_17.05 {
 	rte_log_dump;
 	rte_log_register;
 	rte_log_set_level;
+	rte_log_set_level_regexp;
 
 } DPDK_17.02;