[dpdk-dev] [PATCH] eal: fix log level check

[dpdk-dev] [PATCH] eal: fix log level check

[David Marchand]

From: Jean Dao <jean.dao@6wind.com>

According to the api, rte_log() / rte_vlog() are supposed to check the log level
and type but they were not doing so. This check was only done in the RTE_LOG
macro while this macro is only there to remove log messages at build time.

rte_log() always calls rte_vlog(), so move the check to rte_vlog() only.

Signed-off-by: Jean Dao <jean.dao@6wind.com>
Signed-off-by: David Marchand <david.marchand@6wind.com>
---
 lib/librte_eal/common/eal_common_log.c  |    8 +++++---
 lib/librte_eal/common/include/rte_log.h |    4 +---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index ff44d23..fe3d7d5 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/lib/librte_eal/common/eal_common_log.c
@@ -265,14 +265,15 @@ rte_log_dump_history(FILE *out)
  * defined by the previous call to rte_openlog_stream().
  */
 int
-rte_vlog(__attribute__((unused)) uint32_t level,
-	 __attribute__((unused)) uint32_t logtype,
-	   const char *format, va_list ap)
+rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
 {
 	int ret;
 	FILE *f = rte_logs.file;
 	unsigned lcore_id;
 
+	if ((level > rte_logs.level) || !(logtype & rte_logs.type))
+		return 0;
+
 	/* save loglevel and logtype in a global per-lcore variable */
 	lcore_id = rte_lcore_id();
 	if (lcore_id < RTE_MAX_LCORE) {
@@ -288,6 +289,7 @@ rte_vlog(__attribute__((unused)) uint32_t level,
 /*
  * Generates a log message The message will be sent in the stream
  * defined by the previous call to rte_openlog_stream().
+ * No need to check level here, done by rte_vlog().
  */
 int
 rte_log(uint32_t level, uint32_t logtype, const char *format, ...)
diff --git a/lib/librte_eal/common/include/rte_log.h b/lib/librte_eal/common/include/rte_log.h
index f83a0d9..3b467c1 100644
--- a/lib/librte_eal/common/include/rte_log.h
+++ b/lib/librte_eal/common/include/rte_log.h
@@ -299,9 +299,7 @@ int rte_vlog(uint32_t level, uint32_t logtype, const char *format, va_list ap)
  *   - Negative on error.
  */
 #define RTE_LOG(l, t, ...)					\
-	(void)(((RTE_LOG_ ## l <= RTE_LOG_LEVEL) &&			\
-	  (RTE_LOG_ ## l <= rte_logs.level) &&			\
-	  (RTE_LOGTYPE_ ## t & rte_logs.type)) ?		\
+	(void)((RTE_LOG_ ## l <= RTE_LOG_LEVEL) ?		\
 	 rte_log(RTE_LOG_ ## l,					\
 		 RTE_LOGTYPE_ ## t, # t ": " __VA_ARGS__) :	\
 	 0)
-- 
1.7.10.4

Re: [dpdk-dev] [PATCH] eal: fix log level check

[Thomas Monjalon]

> According to the api, rte_log() / rte_vlog() are supposed to check the log level
> and type but they were not doing so. This check was only done in the RTE_LOG
> macro while this macro is only there to remove log messages at build time.
> 
> rte_log() always calls rte_vlog(), so move the check to rte_vlog() only.
> 
> Signed-off-by: Jean Dao <jean.dao@6wind.com>
> Signed-off-by: David Marchand <david.marchand@6wind.com>

Applied, thanks