ext4: add normal write support for inline data

For a normal write case (not journalled write, not delayed
allocation), we write to the inline if the file is small and convert
it to an extent based file when the write is larger than the max
inline size.

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

1 files changed, 26 insertions, 0 deletions

diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 646c9b9be8ed..db5672206238 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -141,6 +141,15 @@ extern int ext4_init_inline_data(handle_t *handle, struct inode *inode,
 extern int ext4_destroy_inline_data(handle_t *handle, struct inode *inode);
 
 extern int ext4_readpage_inline(struct inode *inode, struct page *page);
+extern int ext4_try_to_write_inline_data(struct address_space *mapping,
+                                         struct inode *inode,
+                                         loff_t pos, unsigned len,
+                                         unsigned flags,
+                                         struct page **pagep);
+extern int ext4_write_inline_data_end(struct inode *inode,
+                                      loff_t pos, unsigned len,
+                                      unsigned copied,
+                                      struct page *page);
 # else  /* CONFIG_EXT4_FS_XATTR */
 
 static inline int
@@ -262,6 +271,23 @@ static inline int ext4_readpage_inline(struct inode *inode, struct page *page)
 {
         return 0;
 }
+
+static inline int ext4_try_to_write_inline_data(struct address_space *mapping,
+                                                struct inode *inode,
+                                                loff_t pos, unsigned len,
+                                                unsigned flags,
+                                                struct page **pagep)
+{
+        return 0;
+}
+
+static inline int ext4_write_inline_data_end(struct inode *inode,
+                                             loff_t pos, unsigned len,
+                                             unsigned copied,
+                                             struct page *page)
+{
+        return 0;
+}
 # endif  /* CONFIG_EXT4_FS_XATTR */
 
 #ifdef CONFIG_EXT4_FS_SECURITY