[dpdk-dev] [PATCH 3/8] eal: change several log levels matching a regexp

[Olivier Matz]

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

Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
---
 lib/librte_eal/bsdapp/eal/rte_eal_version.map   |  1 +
 lib/librte_eal/common/eal_common_log.c          | 21 +++++++++++++++++++++
 lib/librte_eal/common/include/rte_log.h         | 12 ++++++++++++
 lib/librte_eal/linuxapp/eal/rte_eal_version.map |  1 +
 4 files changed, 35 insertions(+)

diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index d7a46a7..be829cb 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -183,5 +183,6 @@ DPDK_17.02 {
 	rte_log_dump;
 	rte_log_register;
 	rte_log_set_level;
+	rte_log_set_level_regexp;
 
 } DPDK_16.11;
diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index a311279..b35c8b2 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/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>
@@ -134,6 +135,26 @@ 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)
 {
diff --git a/lib/librte_eal/common/include/rte_log.h b/lib/librte_eal/common/include/rte_log.h
index 97e0c5e..ce48b07 100644
--- a/lib/librte_eal/common/include/rte_log.h
+++ b/lib/librte_eal/common/include/rte_log.h
@@ -157,6 +157,18 @@ 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.
+ *
  * @param logtype
  *   The log type identifier.
  * @param level
diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
index 96cb961..a8116ed 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -187,5 +187,6 @@ DPDK_17.02 {
 	rte_log_dump;
 	rte_log_register;
 	rte_log_set_level;
+	rte_log_set_level_regexp;
 
 } DPDK_16.11;
-- 
2.8.1