From: Martin Wilck <mwilck@xxxxxxxx>
Currently no libdm messages are logged at verbosity 3 and lower,
not even fatal ones. That seems wrong. Rather, we should map
our log levels (2 ~ WARN, 3 ~ NOTICE) to those of libdm
(_LOG_WARN = 4, _LOG_NOTICE = 5). Tests show that the results
are quite satisfactory for different verbosity levels.
dm_log_init_verbose() doesn't need to be called, as it only
sets the log level for libdm's internal logging function which
we don't use.
Signed-off-by: Martin Wilck <mwilck@xxxxxxxx>
---
libmultipath/devmapper.c | 25 ++++++++++++++++---------
1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c
index f597ff8..4096e9d 100644
--- a/libmultipath/devmapper.c
+++ b/libmultipath/devmapper.c
@@ -12,6 +12,7 @@
#include <ctype.h>
#include <unistd.h>
#include <errno.h>
+#include <syslog.h>
#include <sys/sysmacros.h>
#include <linux/dm-ioctl.h>
@@ -65,13 +66,15 @@ __attribute__((format(printf, 4, 5))) static void
dm_write_log (int level, const char *file, int line, const char *f, ...)
{
va_list ap;
- int thres;
- if (level > 6)
- level = 6;
+ /*
+ * libdm uses the same log levels as syslog,
+ * except that EMERG/ALERT are not used
+ */
+ if (level > LOG_DEBUG)
+ level = LOG_DEBUG;
- thres = dm_conf_verbosity;
- if (thres <= 3 || level > thres)
+ if (level > dm_conf_verbosity)
return;
va_start(ap, f);
@@ -90,8 +93,9 @@ dm_write_log (int level, const char *file, int line, const char *f, ...)
vfprintf(stderr, f, ap);
fprintf(stderr, "\n");
} else {
- condlog(level, "libdevmapper: %s(%i): ", file, line);
- log_safe(level + 3, f, ap);
+ condlog(level >= LOG_ERR ? level - LOG_ERR : 0,
+ "libdevmapper: %s(%i): ", file, line);
+ log_safe(level, f, ap);
}
va_end(ap);
@@ -100,9 +104,12 @@ dm_write_log (int level, const char *file, int line, const char *f, ...)
void dm_init(int v)
{
- dm_conf_verbosity = v;
+ /*
+ * This maps libdm's standard loglevel _LOG_WARN (= 4), which is rather
+ * quiet in practice, to multipathd's default verbosity 2
+ */
+ dm_conf_verbosity = v + 2;
dm_log_init(&dm_write_log);
- dm_log_init_verbose(v + 3);
}
static int
--
2.26.2
--
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