[dpdk-dev] [RFC PATCH] log: track log level changes
David Marchand
david.marchand at redhat.com
Fri Jun 26 13:47:51 CEST 2020
Add a log message when changing log levels to be sure of which logtype
is enabled.
Suggested-by: Ilya Maximets <i.maximets at ovn.org>
Signed-off-by: David Marchand <david.marchand at redhat.com>
---
Sending this as a RFC, this makes it easier to notice the problem we have
lived with so far: shared library loading do not honor log levels set on
cmdline unless it uses rte_log_register_type_and_pick_level.
---
lib/librte_eal/common/eal_common_log.c | 56 ++++++++++++++++----------
1 file changed, 35 insertions(+), 21 deletions(-)
diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index 8835c8fff8..24d53ed9c7 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/lib/librte_eal/common/eal_common_log.c
@@ -130,6 +130,37 @@ rte_log_can_log(uint32_t logtype, uint32_t level)
return true;
}
+static const char *
+loglevel_to_string(uint32_t level)
+{
+ switch (level) {
+ case 0: return "disabled";
+ case RTE_LOG_EMERG: return "emerg";
+ case RTE_LOG_ALERT: return "alert";
+ case RTE_LOG_CRIT: return "critical";
+ case RTE_LOG_ERR: return "error";
+ case RTE_LOG_WARNING: return "warning";
+ case RTE_LOG_NOTICE: return "notice";
+ case RTE_LOG_INFO: return "info";
+ case RTE_LOG_DEBUG: return "debug";
+ default: return "unknown";
+ }
+}
+
+static void
+logtype_set_level(uint32_t type, uint32_t level)
+{
+ uint32_t current = rte_logs.dynamic_types[type].loglevel;
+
+ if (current != level) {
+ rte_logs.dynamic_types[type].loglevel = level;
+ RTE_LOG(DEBUG, EAL, "%s logtype level changed from %s to %s\n",
+ rte_logs.dynamic_types[type].name,
+ loglevel_to_string(current),
+ loglevel_to_string(level));
+ }
+}
+
int
rte_log_set_level(uint32_t type, uint32_t level)
{
@@ -138,7 +169,7 @@ rte_log_set_level(uint32_t type, uint32_t level)
if (level > RTE_LOG_DEBUG)
return -1;
- rte_logs.dynamic_types[type].loglevel = level;
+ logtype_set_level(type, level);
return 0;
}
@@ -161,7 +192,7 @@ rte_log_set_level_regexp(const char *regex, uint32_t level)
continue;
if (regexec(&r, rte_logs.dynamic_types[i].name, 0,
NULL, 0) == 0)
- rte_logs.dynamic_types[i].loglevel = level;
+ logtype_set_level(i, level);
}
regfree(&r);
@@ -221,7 +252,7 @@ rte_log_set_level_pattern(const char *pattern, uint32_t level)
continue;
if (fnmatch(pattern, rte_logs.dynamic_types[i].name, 0) == 0)
- rte_logs.dynamic_types[i].loglevel = level;
+ logtype_set_level(i, level);
}
return 0;
@@ -328,7 +359,7 @@ rte_log_register_type_and_pick_level(const char *name, uint32_t level_def)
}
}
- rte_logs.dynamic_types[type].loglevel = level;
+ logtype_set_level(type, level);
return type;
}
@@ -390,23 +421,6 @@ RTE_INIT_PRIO(rte_log_init, LOG)
rte_logs.dynamic_types_len = RTE_LOGTYPE_FIRST_EXT_ID;
}
-static const char *
-loglevel_to_string(uint32_t level)
-{
- switch (level) {
- case 0: return "disabled";
- case RTE_LOG_EMERG: return "emerg";
- case RTE_LOG_ALERT: return "alert";
- case RTE_LOG_CRIT: return "critical";
- case RTE_LOG_ERR: return "error";
- case RTE_LOG_WARNING: return "warning";
- case RTE_LOG_NOTICE: return "notice";
- case RTE_LOG_INFO: return "info";
- case RTE_LOG_DEBUG: return "debug";
- default: return "unknown";
- }
-}
-
/* dump global level and registered log types */
void
rte_log_dump(FILE *f)
--
2.23.0
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