ext4: make ext4_init_dot_dotdot for inline dir usage

Currently, the initialization of dot and dotdot are encapsulated in
ext4_mkdir and also bond with dir_block. So create a new function
named ext4_init_new_dir and the initialization is moved to
ext4_init_dot_dotdot. Now it will called either in the normal non-inline
case(rec_len of ".." will cover the whole block) or when we converting an
inline dir to a block(rec len of ".." will be the real length). The start
of the next entry is also returned for inline dir usage.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 268636af7f5c..cf840146ce81 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2415,6 +2415,10 @@ extern void ext4_unwritten_wait(struct inode *inode);
 extern const struct inode_operations ext4_dir_inode_operations;
 extern const struct inode_operations ext4_special_inode_operations;
 extern struct dentry *ext4_get_parent(struct dentry *child);
+extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
+                                 struct ext4_dir_entry_2 *de,
+                                 int blocksize, int csum_size,
+                                 unsigned int parent_ino, int dotdot_real_len);
 
 /* symlink.c */
 extern const struct inode_operations ext4_symlink_inode_operations;