f2fs: clean up f2fs_ioctl functions

This patch cleans up f2fs_ioctl functions for better readability.
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/file.c

@@ -805,20 +805,21 @@ static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
 		return flags & F2FS_OTHER_FLMASK;
 }
 
-long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
 {
 	struct inode *inode = file_inode(filp);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
-	unsigned int flags;
-	int ret;
+	unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
+	return put_user(flags, (int __user *)arg);
+}
 
-	switch (cmd) {
-	case F2FS_IOC_GETFLAGS:
-		flags = fi->i_flags & FS_FL_USER_VISIBLE;
-		return put_user(flags, (int __user *) arg);
-	case F2FS_IOC_SETFLAGS:
-	{
+static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
 	unsigned int oldflags;
+	int ret;
 
 	ret = mnt_want_write_file(filp);
 	if (ret)
@@ -829,7 +830,7 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		goto out;
 	}
 
-		if (get_user(flags, (int __user *) arg)) {
+	if (get_user(flags, (int __user *)arg)) {
 		ret = -EFAULT;
 		goto out;
 	}
@@ -859,13 +860,15 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 out:
 	mnt_drop_write_file(filp);
 	return ret;
-	}
-	case FITRIM:
-	{
+}
+
+static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
 	struct super_block *sb = inode->i_sb;
 	struct request_queue *q = bdev_get_queue(sb->s_bdev);
 	struct fstrim_range range;
-		int ret = 0;
+	int ret;
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
@@ -886,9 +889,18 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	if (copy_to_user((struct fstrim_range __user *)arg, &range,
 				sizeof(range)))
 		return -EFAULT;
-
 	return 0;
-	}
+}
+
+long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	switch (cmd) {
+	case F2FS_IOC_GETFLAGS:
+		return f2fs_ioc_getflags(filp, arg);
+	case F2FS_IOC_SETFLAGS:
+		return f2fs_ioc_setflags(filp, arg);
+	case FITRIM:
+		return f2fs_ioc_fitrim(filp, arg);
 	default:
 		return -ENOTTY;
 	}