UBIFS: re-arrange debugging code a bit

Move 'dbg_debugfs_init()' and 'dbg_debugfs_exit()' functions which initialize
debugfs for whole UBIFS subsystem below the code which initializes debugfs for
a particular UBIFS instance. And do the same for 'ubifs_debugging_init()' and
'ubifs_debugging_exit()' functions. This layout is a bit better for the next
patches, so this is just a preparation.

Also, rename 'open_debugfs_file()' into 'dfs_file_open()' for consistency.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index e4a3630..24a8507 100644 (file)
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -2808,70 +2808,13 @@ int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype)
        return 0;
 }
 
-/**
- * ubifs_debugging_init - initialize UBIFS debugging.
- * @c: UBIFS file-system description object
- *
- * This function initializes debugging-related data for the file system.
- * Returns zero in case of success and a negative error code in case of
- * failure.
- */
-int ubifs_debugging_init(struct ubifs_info *c)
-{
-       c->dbg = kzalloc(sizeof(struct ubifs_debug_info), GFP_KERNEL);
-       if (!c->dbg)
-               return -ENOMEM;
-
-       failure_mode_init(c);
-       return 0;
-}
-
-/**
- * ubifs_debugging_exit - free debugging data.
- * @c: UBIFS file-system description object
- */
-void ubifs_debugging_exit(struct ubifs_info *c)
-{
-       failure_mode_exit(c);
-       kfree(c->dbg);
-}
-
 /*
  * Root directory for UBIFS stuff in debugfs. Contains sub-directories which
  * contain the stuff specific to particular file-system mounts.
  */
 static struct dentry *dfs_rootdir;
 
-/**
- * dbg_debugfs_init - initialize debugfs file-system.
- *
- * UBIFS uses debugfs file-system to expose various debugging knobs to
- * user-space. This function creates "ubifs" directory in the debugfs
- * file-system. Returns zero in case of success and a negative error code in
- * case of failure.
- */
-int dbg_debugfs_init(void)
-{
-       dfs_rootdir = debugfs_create_dir("ubifs", NULL);
-       if (IS_ERR_OR_NULL(dfs_rootdir)) {
-               int err = dfs_rootdir ? PTR_ERR(dfs_rootdir) : -ENODEV;
-               ubifs_err("cannot create \"ubifs\" debugfs directory, "
-                         "error %d\n", err);
-               return err;
-       }
-
-       return 0;
-}
-
-/**
- * dbg_debugfs_exit - remove the "ubifs" directory from debugfs file-system.
- */
-void dbg_debugfs_exit(void)
-{
-       debugfs_remove(dfs_rootdir);
-}
-
-static int open_debugfs_file(struct inode *inode, struct file *file)
+static int dfs_file_open(struct inode *inode, struct file *file)
 {
        file->private_data = inode->i_private;
        return nonseekable_open(inode, file);
@@ -2978,7 +2921,7 @@ static ssize_t dfs_file_write(struct file *file, const char __user *u,
 }
 
 static const struct file_operations dfs_fops = {
-       .open = open_debugfs_file,
+       .open = dfs_file_open,
        .read = dfs_file_read,
        .write = dfs_file_write,
        .owner = THIS_MODULE,
@@ -3099,4 +3042,61 @@ void dbg_debugfs_exit_fs(struct ubifs_info *c)
        debugfs_remove_recursive(c->dbg->dfs_dir);
 }
 
+/**
+ * dbg_debugfs_init - initialize debugfs file-system.
+ *
+ * UBIFS uses debugfs file-system to expose various debugging knobs to
+ * user-space. This function creates "ubifs" directory in the debugfs
+ * file-system. Returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+int dbg_debugfs_init(void)
+{
+       dfs_rootdir = debugfs_create_dir("ubifs", NULL);
+       if (IS_ERR_OR_NULL(dfs_rootdir)) {
+               int err = dfs_rootdir ? PTR_ERR(dfs_rootdir) : -ENODEV;
+               ubifs_err("cannot create \"ubifs\" debugfs directory, "
+                         "error %d\n", err);
+               return err;
+       }
+
+       return 0;
+}
+
+/**
+ * dbg_debugfs_exit - remove the "ubifs" directory from debugfs file-system.
+ */
+void dbg_debugfs_exit(void)
+{
+       debugfs_remove(dfs_rootdir);
+}
+
+/**
+ * ubifs_debugging_init - initialize UBIFS debugging.
+ * @c: UBIFS file-system description object
+ *
+ * This function initializes debugging-related data for the file system.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubifs_debugging_init(struct ubifs_info *c)
+{
+       c->dbg = kzalloc(sizeof(struct ubifs_debug_info), GFP_KERNEL);
+       if (!c->dbg)
+               return -ENOMEM;
+
+       failure_mode_init(c);
+       return 0;
+}
+
+/**
+ * ubifs_debugging_exit - free debugging data.
+ * @c: UBIFS file-system description object
+ */
+void ubifs_debugging_exit(struct ubifs_info *c)
+{
+       failure_mode_exit(c);
+       kfree(c->dbg);
+}
+
 #endif /* CONFIG_UBIFS_FS_DEBUG */