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authorJeff Mahoney <jeffm@suse.com>2016-08-31 23:55:33 -0400
committerDavid Sterba <dsterba@suse.com>2016-09-26 17:59:49 +0200
commit897a41b1167955bd543bb252fd3f06f5844f2177 (patch)
treec9a0db81d7387ebb4f3cb5199b05a106e08efbc9
parent2309e79650100073ca8347279690742777c6698b (diff)
btrfs: add dynamic debug support
We can re-use the dynamic debugging descriptor to make use of the dynamic debugging mechanism but still use our own printk interface. Defining the DEBUG macro works as it did before. When it's defined, all of the messages default to print. We can also enable all debug messages at boot or module-load time using the 'dyndbg' and 'btrfs.dyndbg' options. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
-rw-r--r--fs/btrfs/ctree.h31
1 files changed, 30 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 33fe03551105..ae496e41692a 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -37,6 +37,7 @@
#include <linux/workqueue.h>
#include <linux/security.h>
#include <linux/sizes.h>
+#include <linux/dynamic_debug.h>
#include "extent_io.h"
#include "extent_map.h"
#include "async-thread.h"
@@ -3315,7 +3316,35 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
#define btrfs_info_rl(fs_info, fmt, args...) \
btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
-#ifdef DEBUG
+
+#if defined(CONFIG_DYNAMIC_DEBUG)
+#define btrfs_debug(fs_info, fmt, args...) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \
+} while (0)
+#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \
+} while (0)
+#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \
+ ##args);\
+} while (0)
+#define btrfs_debug_rl(fs_info, fmt, args...) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \
+ ##args); \
+} while (0)
+#elif defined(DEBUG)
#define btrfs_debug(fs_info, fmt, args...) \
btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
#define btrfs_debug_in_rcu(fs_info, fmt, args...) \