f2fs: support fiemap() for directory inode

Adjust f2fs_fiemap() to support fiemap() on directory inode.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/data.c

@@ -1539,7 +1539,7 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		goto out;
 	}
 
-	if (f2fs_has_inline_data(inode)) {
+	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
 		ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
 		if (ret != -EAGAIN)
 			goto out;

fs/f2fs/inline.c

@@ -704,7 +704,13 @@ int f2fs_inline_data_fiemap(struct inode *inode,
 	if (IS_ERR(ipage))
 		return PTR_ERR(ipage);
 
-	if (!f2fs_has_inline_data(inode)) {
+	if ((S_ISREG(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
+				!f2fs_has_inline_data(inode)) {
+		err = -EAGAIN;
+		goto out;
+	}
+
+	if (S_ISDIR(inode->i_mode) && !f2fs_has_inline_dentry(inode)) {
 		err = -EAGAIN;
 		goto out;
 	}

fs/f2fs/namei.c

@@ -1250,6 +1250,7 @@ const struct inode_operations f2fs_dir_inode_operations = {
 #ifdef CONFIG_F2FS_FS_XATTR
 	.listxattr	= f2fs_listxattr,
 #endif
+	.fiemap		= f2fs_fiemap,
 };
 
 const struct inode_operations f2fs_symlink_inode_operations = {