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/data.c b/fs/f2fs/data.c
index 5b80ada..973fd77 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -257,9 +257,6 @@
bool need_put = dn->inode_page ? false : true;
int err;
- /* if inode_page exists, index should be zero */
- f2fs_bug_on(F2FS_I_SB(dn->inode), !need_put && index);
-
err = get_dnode_of_data(dn, index, ALLOC_NODE);
if (err)
return err;
@@ -951,7 +948,7 @@
{
struct inode *inode = mapping->host;
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
- struct page *page;
+ struct page *page, *ipage;
pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT;
struct dnode_of_data dn;
int err = 0;
@@ -979,13 +976,26 @@
goto inline_data;
f2fs_lock_op(sbi);
- set_new_dnode(&dn, inode, NULL, NULL, 0);
- err = f2fs_reserve_block(&dn, index);
- f2fs_unlock_op(sbi);
- if (err) {
+
+ /* check inline_data */
+ ipage = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(ipage))
+ goto unlock_fail;
+
+ if (f2fs_has_inline_data(inode)) {
+ f2fs_put_page(ipage, 1);
+ f2fs_unlock_op(sbi);
f2fs_put_page(page, 0);
- goto fail;
+ goto repeat;
}
+
+ set_new_dnode(&dn, inode, ipage, NULL, 0);
+ err = f2fs_reserve_block(&dn, index);
+ if (err)
+ goto unlock_fail;
+ f2fs_put_dnode(&dn);
+ f2fs_unlock_op(sbi);
+
inline_data:
lock_page(page);
if (unlikely(page->mapping != mapping)) {
@@ -1038,6 +1048,10 @@
SetPageUptodate(page);
clear_cold_data(page);
return 0;
+
+unlock_fail:
+ f2fs_unlock_op(sbi);
+ f2fs_put_page(page, 0);
fail:
f2fs_write_failed(mapping, pos + len);
return err;