[DLM] add config entry to enable log_debug

Add a new dlm_config_info field to enable log_debug output and change
log_debug() to use it.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

3 files changed, 11 insertions, 7 deletions

diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 958021f91486..7cf20209b127 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -775,6 +775,7 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num)
 #define DEFAULT_RECOVER_TIMER      5
 #define DEFAULT_TOSS_SECS         10
 #define DEFAULT_SCAN_SECS          5
+#define DEFAULT_LOG_DEBUG          0
 
 struct dlm_config_info dlm_config = {
         .ci_tcp_port = DEFAULT_TCP_PORT,
@@ -784,6 +785,7 @@ struct dlm_config_info dlm_config = {
         .ci_dirtbl_size = DEFAULT_DIRTBL_SIZE,
         .ci_recover_timer = DEFAULT_RECOVER_TIMER,
         .ci_toss_secs = DEFAULT_TOSS_SECS,
-        .ci_scan_secs = DEFAULT_SCAN_SECS
+        .ci_scan_secs = DEFAULT_SCAN_SECS,
+        .ci_log_debug = DEFAULT_LOG_DEBUG
 };
 
diff --git a/fs/dlm/config.h b/fs/dlm/config.h
index ce603e1c3bac..1e978611a96e 100644
--- a/fs/dlm/config.h
+++ b/fs/dlm/config.h
@@ -25,6 +25,7 @@ struct dlm_config_info {
         int ci_recover_timer;
         int ci_toss_secs;
         int ci_scan_secs;
+        int ci_log_debug;
 };
 
 extern struct dlm_config_info dlm_config;
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 7185a132a8b5..ee993c5c2307 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -41,6 +41,7 @@
 #include <asm/uaccess.h>
 
 #include <linux/dlm.h>
+#include "config.h"
 
 #define DLM_LOCKSPACE_LEN       64
 
@@ -69,12 +70,12 @@ struct dlm_mhandle;
 #define log_error(ls, fmt, args...) \
         printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args)
 
-#define DLM_LOG_DEBUG
-#ifdef DLM_LOG_DEBUG
-#define log_debug(ls, fmt, args...) log_error(ls, fmt, ##args)
-#else
-#define log_debug(ls, fmt, args...)
-#endif
+#define log_debug(ls, fmt, args...) \
+do { \
+        if (dlm_config.ci_log_debug) \
+                printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
+                       (ls)->ls_name , ##args); \
+} while (0)
 
 #define DLM_ASSERT(x, do) \
 { \