1 files changed, 33 insertions, 46 deletions

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 78d63b818f0b..f290cb7cb834 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -35,6 +35,7 @@
 #include <linux/kthread.h>
 #include <linux/poison.h>
 #include <linux/proc_fs.h>
+#include <linux/debugfs.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
@@ -528,7 +529,7 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid)
 {
         int err = 0;
 
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
         spin_lock(&journal->j_state_lock);
         if (!tid_geq(journal->j_commit_request, tid)) {
                 printk(KERN_EMERG
@@ -1709,7 +1710,7 @@ void jbd2_slab_free(void *ptr,  size_t size)
  * Journal_head storage management
  */
 static struct kmem_cache *jbd2_journal_head_cache;
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
 static atomic_t nr_journal_heads = ATOMIC_INIT(0);
 #endif
 
@@ -1747,7 +1748,7 @@ static struct journal_head *journal_alloc_journal_head(void)
         struct journal_head *ret;
         static unsigned long last_warning;
 
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
         atomic_inc(&nr_journal_heads);
 #endif
         ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS);
@@ -1768,7 +1769,7 @@ static struct journal_head *journal_alloc_journal_head(void)
 
 static void journal_free_journal_head(struct journal_head *jh)
 {
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
         atomic_dec(&nr_journal_heads);
         memset(jh, JBD_POISON_FREE, sizeof(*jh));
 #endif
@@ -1951,64 +1952,50 @@ void jbd2_journal_put_journal_head(struct journal_head *jh)
 }
 
 /*
- * /proc tunables
+ * debugfs tunables
  */
-#if defined(CONFIG_JBD_DEBUG)
-int jbd2_journal_enable_debug;
+#if defined(CONFIG_JBD2_DEBUG)
+u8 jbd2_journal_enable_debug;
 EXPORT_SYMBOL(jbd2_journal_enable_debug);
 #endif
 
-#if defined(CONFIG_JBD_DEBUG) && defined(CONFIG_PROC_FS)
+#if defined(CONFIG_JBD2_DEBUG) && defined(CONFIG_DEBUG_FS)
 
-static struct proc_dir_entry *proc_jbd_debug;
+#define JBD2_DEBUG_NAME "jbd2-debug"
 
-static int read_jbd_debug(char *page, char **start, off_t off,
-                          int count, int *eof, void *data)
-{
-        int ret;
+struct dentry *jbd2_debugfs_dir, *jbd2_debug;
 
-        ret = sprintf(page + off, "%d\n", jbd2_journal_enable_debug);
-        *eof = 1;
-        return ret;
+static void __init jbd2_create_debugfs_entry(void)
+{
+        jbd2_debugfs_dir = debugfs_create_dir("jbd2", NULL);
+        if (jbd2_debugfs_dir)
+                jbd2_debug = debugfs_create_u8(JBD2_DEBUG_NAME, S_IRUGO,
+                                               jbd2_debugfs_dir,
+                                               &jbd2_journal_enable_debug);
 }
 
-static int write_jbd_debug(struct file *file, const char __user *buffer,
-                           unsigned long count, void *data)
+static void __exit jbd2_remove_debugfs_entry(void)
 {
-        char buf[32];
-
-        if (count > ARRAY_SIZE(buf) - 1)
-                count = ARRAY_SIZE(buf) - 1;
-        if (copy_from_user(buf, buffer, count))
-                return -EFAULT;
-        buf[ARRAY_SIZE(buf) - 1] = '\0';
-        jbd2_journal_enable_debug = simple_strtoul(buf, NULL, 10);
-        return count;
+        if (jbd2_debug)
+                debugfs_remove(jbd2_debug);
+        if (jbd2_debugfs_dir)
+                debugfs_remove(jbd2_debugfs_dir);
 }
 
-#define JBD_PROC_NAME "sys/fs/jbd2-debug"
+#else
 
-static void __init create_jbd_proc_entry(void)
+static void __init jbd2_create_debugfs_entry(void)
 {
-        proc_jbd_debug = create_proc_entry(JBD_PROC_NAME, 0644, NULL);
-        if (proc_jbd_debug) {
-                /* Why is this so hard? */
-                proc_jbd_debug->read_proc = read_jbd_debug;
-                proc_jbd_debug->write_proc = write_jbd_debug;
-        }
+        do {
+        } while (0);
 }
 
-static void __exit jbd2_remove_jbd_proc_entry(void)
+static void __exit jbd2_remove_debugfs_entry(void)
 {
-        if (proc_jbd_debug)
-                remove_proc_entry(JBD_PROC_NAME, NULL);
+        do {
+        } while (0);
 }
 
-#else
-
-#define create_jbd_proc_entry() do {} while (0)
-#define jbd2_remove_jbd_proc_entry() do {} while (0)
-
 #endif
 
 struct kmem_cache *jbd2_handle_cache;
@@ -2067,18 +2054,18 @@ static int __init journal_init(void)
         ret = journal_init_caches();
         if (ret != 0)
                 jbd2_journal_destroy_caches();
-        create_jbd_proc_entry();
+        jbd2_create_debugfs_entry();
         return ret;
 }
 
 static void __exit journal_exit(void)
 {
-#ifdef CONFIG_JBD_DEBUG
+#ifdef CONFIG_JBD2_DEBUG
         int n = atomic_read(&nr_journal_heads);
         if (n)
                 printk(KERN_EMERG "JBD: leaked %d journal_heads!\n", n);
 #endif
-        jbd2_remove_jbd_proc_entry();
+        jbd2_remove_debugfs_entry();
         jbd2_journal_destroy_caches();
 }