f2fs: avoid to allocate when inline_data was written
The sceanrio is like this.
inline_data i_size page write_begin/vm_page_mkwrite
X 30 dirty_page
X 30 write to #4096 position
X 30 get_dnode_of_data wait for get_dnode_of_data
O 30 write inline_data
O 30 get_dnode_of_data
O 30 reserve data block
..
In this case, we have #0 = NEW_ADDR and inline_data as well.
We should not allow this condition for further access.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 543d8c6..456df07 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -35,12 +35,13 @@
struct inode *inode = file_inode(vma->vm_file);
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct dnode_of_data dn;
+ struct page *ipage;
int err;
f2fs_balance_fs(sbi);
sb_start_pagefault(inode->i_sb);
-
+retry:
/* force to convert with normal data indices */
err = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, page);
if (err)
@@ -48,11 +49,28 @@
/* block allocation */
f2fs_lock_op(sbi);
- set_new_dnode(&dn, inode, NULL, NULL, 0);
- err = f2fs_reserve_block(&dn, page->index);
- f2fs_unlock_op(sbi);
- if (err)
+
+ /* check inline_data */
+ ipage = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(ipage)) {
+ f2fs_unlock_op(sbi);
goto out;
+ }
+
+ if (f2fs_has_inline_data(inode)) {
+ f2fs_put_page(ipage, 1);
+ f2fs_unlock_op(sbi);
+ goto retry;
+ }
+
+ set_new_dnode(&dn, inode, ipage, NULL, 0);
+ err = f2fs_reserve_block(&dn, page->index);
+ if (err) {
+ f2fs_unlock_op(sbi);
+ goto out;
+ }
+ f2fs_put_dnode(&dn);
+ f2fs_unlock_op(sbi);
file_update_time(vma->vm_file);
lock_page(page);