dm: add ratelimit logging macros

Add ratelimit extension to dm logging macros.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 36 insertions, 4 deletions

diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 2f796b1436b2..462ee652a890 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -18,13 +18,45 @@
 
 #define DM_NAME "device-mapper"
 
-#define DMERR(f, arg...) printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
-#define DMWARN(f, arg...) printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
-#define DMINFO(f, arg...) printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMERR(f, arg...) \
+        printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMERR_LIMIT(f, arg...) \
+        do { \
+                if (printk_ratelimit()) \
+                        printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " \
+                               f "\n", ## arg); \
+        } while (0)
+
+#define DMWARN(f, arg...) \
+        printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMWARN_LIMIT(f, arg...) \
+        do { \
+                if (printk_ratelimit()) \
+                        printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " \
+                               f "\n", ## arg); \
+        } while (0)
+
+#define DMINFO(f, arg...) \
+        printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMINFO_LIMIT(f, arg...) \
+        do { \
+                if (printk_ratelimit()) \
+                        printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f \
+                               "\n", ## arg); \
+        } while (0)
+
 #ifdef CONFIG_DM_DEBUG
-#  define DMDEBUG(f, arg...) printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg)
+#  define DMDEBUG(f, arg...) \
+        printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg)
+#  define DMDEBUG_LIMIT(f, arg...) \
+        do { \
+                if (printk_ratelimit()) \
+                        printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX ": " f \
+                               "\n", ## arg); \
+        } while (0)
 #else
 #  define DMDEBUG(f, arg...) do {} while (0)
+#  define DMDEBUG_LIMIT(f, arg...) do {} while (0)
 #endif
 
 #define DMEMIT(x...) sz += ((sz >= maxlen) ? \