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authorTao Ma <boyu.mt@taobao.com>2012-12-10 14:05:57 -0500
committerTheodore Ts'o <tytso@mit.edu>2012-12-10 14:05:57 -0500
commit9c3569b50f12e47cc5e907b5e37e4a45c0c10b43 (patch)
treedfd2c1cf5ad98ca059ff2f1f330f34faed2f79eb /fs/ext4/xattr.h
parent3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb (diff)
downloadlinux-9c3569b50f12e47cc5e907b5e37e4a45c0c10b43.tar.bz2
ext4: add delalloc support for inline data
For delayed allocation mode, we write to inline data if the file is small enough. And in case of we write to some offset larger than the inline size, the 1st page is dirtied, so that ext4_da_writepages can handle the conversion. When the 1st page is initialized with blocks, the inline part is removed. Signed-off-by: Tao Ma <boyu.mt@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/xattr.h')
-rw-r--r--fs/ext4/xattr.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 7095ac13fbc2..37e66f867645 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -154,6 +154,15 @@ extern struct buffer_head *
ext4_journalled_write_inline_data(struct inode *inode,
unsigned len,
struct page *page);
+extern int ext4_da_write_inline_data_begin(struct address_space *mapping,
+ struct inode *inode,
+ loff_t pos, unsigned len,
+ unsigned flags,
+ struct page **pagep,
+ void **fsdata);
+extern int ext4_da_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
@@ -300,6 +309,24 @@ ext4_journalled_write_inline_data(struct inode *inode,
{
return NULL;
}
+
+static inline int
+ext4_da_write_inline_data_begin(struct address_space *mapping,
+ struct inode *inode,
+ loff_t pos, unsigned len,
+ unsigned flags,
+ struct page **pagep,
+ void **fsdata)
+{
+ return 0;
+}
+
+static inline int ext4_da_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